Release 4.10 fs/btrfs/volumes.c
/*
* Copyright (C) 2007 Oracle. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License v2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*/
#include <linux/sched.h>
#include <linux/bio.h>
#include <linux/slab.h>
#include <linux/buffer_head.h>
#include <linux/blkdev.h>
#include <linux/iocontext.h>
#include <linux/capability.h>
#include <linux/ratelimit.h>
#include <linux/kthread.h>
#include <linux/raid/pq.h>
#include <linux/semaphore.h>
#include <linux/uuid.h>
#include <asm/div64.h>
#include "ctree.h"
#include "extent_map.h"
#include "disk-io.h"
#include "transaction.h"
#include "print-tree.h"
#include "volumes.h"
#include "raid56.h"
#include "async-thread.h"
#include "check-integrity.h"
#include "rcu-string.h"
#include "math.h"
#include "dev-replace.h"
#include "sysfs.h"
const struct btrfs_raid_attr btrfs_raid_array[BTRFS_NR_RAID_TYPES] = {
[BTRFS_RAID_RAID10] = {
.sub_stripes = 2,
.dev_stripes = 1,
.devs_max = 0, /* 0 == as many as possible */
.devs_min = 4,
.tolerated_failures = 1,
.devs_increment = 2,
.ncopies = 2,
},
[BTRFS_RAID_RAID1] = {
.sub_stripes = 1,
.dev_stripes = 1,
.devs_max = 2,
.devs_min = 2,
.tolerated_failures = 1,
.devs_increment = 2,
.ncopies = 2,
},
[BTRFS_RAID_DUP] = {
.sub_stripes = 1,
.dev_stripes = 2,
.devs_max = 1,
.devs_min = 1,
.tolerated_failures = 0,
.devs_increment = 1,
.ncopies = 2,
},
[BTRFS_RAID_RAID0] = {
.sub_stripes = 1,
.dev_stripes = 1,
.devs_max = 0,
.devs_min = 2,
.tolerated_failures = 0,
.devs_increment = 1,
.ncopies = 1,
},
[BTRFS_RAID_SINGLE] = {
.sub_stripes = 1,
.dev_stripes = 1,
.devs_max = 1,
.devs_min = 1,
.tolerated_failures = 0,
.devs_increment = 1,
.ncopies = 1,
},
[BTRFS_RAID_RAID5] = {
.sub_stripes = 1,
.dev_stripes = 1,
.devs_max = 0,
.devs_min = 2,
.tolerated_failures = 1,
.devs_increment = 1,
.ncopies = 2,
},
[BTRFS_RAID_RAID6] = {
.sub_stripes = 1,
.dev_stripes = 1,
.devs_max = 0,
.devs_min = 3,
.tolerated_failures = 2,
.devs_increment = 1,
.ncopies = 3,
},
};
const u64 btrfs_raid_group[BTRFS_NR_RAID_TYPES] = {
[BTRFS_RAID_RAID10] = BTRFS_BLOCK_GROUP_RAID10,
[BTRFS_RAID_RAID1] = BTRFS_BLOCK_GROUP_RAID1,
[BTRFS_RAID_DUP] = BTRFS_BLOCK_GROUP_DUP,
[BTRFS_RAID_RAID0] = BTRFS_BLOCK_GROUP_RAID0,
[BTRFS_RAID_SINGLE] = 0,
[BTRFS_RAID_RAID5] = BTRFS_BLOCK_GROUP_RAID5,
[BTRFS_RAID_RAID6] = BTRFS_BLOCK_GROUP_RAID6,
};
/*
* Table to convert BTRFS_RAID_* to the error code if minimum number of devices
* condition is not met. Zero means there's no corresponding
* BTRFS_ERROR_DEV_*_NOT_MET value.
*/
const int btrfs_raid_mindev_error[BTRFS_NR_RAID_TYPES] = {
[BTRFS_RAID_RAID10] = BTRFS_ERROR_DEV_RAID10_MIN_NOT_MET,
[BTRFS_RAID_RAID1] = BTRFS_ERROR_DEV_RAID1_MIN_NOT_MET,
[BTRFS_RAID_DUP] = 0,
[BTRFS_RAID_RAID0] = 0,
[BTRFS_RAID_SINGLE] = 0,
[BTRFS_RAID_RAID5] = BTRFS_ERROR_DEV_RAID5_MIN_NOT_MET,
[BTRFS_RAID_RAID6] = BTRFS_ERROR_DEV_RAID6_MIN_NOT_MET,
};
static int init_first_rw_device(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info,
struct btrfs_device *device);
static int btrfs_relocate_sys_chunks(struct btrfs_fs_info *fs_info);
static void __btrfs_reset_dev_stats(struct btrfs_device *dev);
static void btrfs_dev_stat_print_on_error(struct btrfs_device *dev);
static void btrfs_dev_stat_print_on_load(struct btrfs_device *device);
DEFINE_MUTEX(uuid_mutex);
static LIST_HEAD(fs_uuids);
struct list_head *btrfs_get_fs_uuids(void)
{
return &fs_uuids;
}
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static struct btrfs_fs_devices *__alloc_fs_devices(void)
{
struct btrfs_fs_devices *fs_devs;
fs_devs = kzalloc(sizeof(*fs_devs), GFP_KERNEL);
if (!fs_devs)
return ERR_PTR(-ENOMEM);
mutex_init(&fs_devs->device_list_mutex);
INIT_LIST_HEAD(&fs_devs->devices);
INIT_LIST_HEAD(&fs_devs->resized_devices);
INIT_LIST_HEAD(&fs_devs->alloc_list);
INIT_LIST_HEAD(&fs_devs->list);
return fs_devs;
}
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| david sterba | david sterba | 1 | 1.20% | 1 | 33.33% |
| Total | 83 | 100.00% | 3 | 100.00% |
/**
* alloc_fs_devices - allocate struct btrfs_fs_devices
* @fsid: a pointer to UUID for this FS. If NULL a new UUID is
* generated.
*
* Return: a pointer to a new &struct btrfs_fs_devices on success;
* ERR_PTR() on error. Returned struct is not linked onto any lists and
* can be destroyed with kfree() right away.
*/
static struct btrfs_fs_devices *alloc_fs_devices(const u8 *fsid)
{
struct btrfs_fs_devices *fs_devs;
fs_devs = __alloc_fs_devices();
if (IS_ERR(fs_devs))
return fs_devs;
if (fsid)
memcpy(fs_devs->fsid, fsid, BTRFS_FSID_SIZE);
else
generate_random_uuid(fs_devs->fsid);
return fs_devs;
}
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static void free_fs_devices(struct btrfs_fs_devices *fs_devices)
{
struct btrfs_device *device;
WARN_ON(fs_devices->opened);
while (!list_empty(&fs_devices->devices)) {
device = list_entry(fs_devices->devices.next,
struct btrfs_device, dev_list);
list_del(&device->dev_list);
rcu_string_free(device->name);
kfree(device);
}
kfree(fs_devices);
}
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| zheng yan | zheng yan | 25 | 32.47% | 2 | 40.00% |
| josef bacik | josef bacik | 1 | 1.30% | 1 | 20.00% |
| Total | 77 | 100.00% | 5 | 100.00% |
static void btrfs_kobject_uevent(struct block_device *bdev,
enum kobject_action action)
{
int ret;
ret = kobject_uevent(&disk_to_dev(bdev->bd_disk)->kobj, action);
if (ret)
pr_warn("BTRFS: Sending event '%d' to kobject: '%s' (%p): failed\n",
action,
kobject_name(&disk_to_dev(bdev->bd_disk)->kobj),
&disk_to_dev(bdev->bd_disk)->kobj);
}
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| lukas czerner | lukas czerner | 68 | 98.55% | 1 | 50.00% |
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| Total | 69 | 100.00% | 2 | 100.00% |
void btrfs_cleanup_fs_uuids(void)
{
struct btrfs_fs_devices *fs_devices;
while (!list_empty(&fs_uuids)) {
fs_devices = list_entry(fs_uuids.next,
struct btrfs_fs_devices, list);
list_del(&fs_devices->list);
free_fs_devices(fs_devices);
}
}
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| zheng yan | zheng yan | 47 | 94.00% | 2 | 50.00% |
| chris mason | chris mason | 2 | 4.00% | 1 | 25.00% |
| jeff mahoney | jeff mahoney | 1 | 2.00% | 1 | 25.00% |
| Total | 50 | 100.00% | 4 | 100.00% |
static struct btrfs_device *__alloc_device(void)
{
struct btrfs_device *dev;
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (!dev)
return ERR_PTR(-ENOMEM);
INIT_LIST_HEAD(&dev->dev_list);
INIT_LIST_HEAD(&dev->dev_alloc_list);
INIT_LIST_HEAD(&dev->resized_list);
spin_lock_init(&dev->io_lock);
spin_lock_init(&dev->reada_lock);
atomic_set(&dev->reada_in_flight, 0);
atomic_set(&dev->dev_stats_ccnt, 0);
btrfs_device_data_ordered_init(dev);
INIT_RADIX_TREE(&dev->reada_zones, GFP_NOFS & ~__GFP_DIRECT_RECLAIM);
INIT_RADIX_TREE(&dev->reada_extents, GFP_NOFS & ~__GFP_DIRECT_RECLAIM);
return dev;
}
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| Person | Tokens | Prop | Commits | CommitProp |
| ilya dryomov | ilya dryomov | 108 | 80.60% | 1 | 16.67% |
| miao xie | miao xie | 18 | 13.43% | 2 | 33.33% |
| sebastian andrzej siewior | sebastian andrzej siewior | 5 | 3.73% | 1 | 16.67% |
| mel gorman | mel gorman | 2 | 1.49% | 1 | 16.67% |
| david sterba | david sterba | 1 | 0.75% | 1 | 16.67% |
| Total | 134 | 100.00% | 6 | 100.00% |
static noinline struct btrfs_device *__find_device(struct list_head *head,
u64 devid, u8 *uuid)
{
struct btrfs_device *dev;
list_for_each_entry(dev, head, dev_list) {
if (dev->devid == devid &&
(!uuid || !memcmp(dev->uuid, uuid, BTRFS_UUID_SIZE))) {
return dev;
}
}
return NULL;
}
static
noinline struct btrfs_fs_devices *find_fsid(u8 *fsid)
{
struct btrfs_fs_devices *fs_devices;
list_for_each_entry(fs_devices, &fs_uuids, list) {
if (memcmp(fsid, fs_devices->fsid, BTRFS_FSID_SIZE) == 0)
return fs_devices;
}
return NULL;
}
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| chris mason | chris mason | 45 | 91.84% | 2 | 66.67% |
| qinghuang feng | qinghuang feng | 4 | 8.16% | 1 | 33.33% |
| Total | 49 | 100.00% | 3 | 100.00% |
static int
btrfs_get_bdev_and_sb(const char *device_path, fmode_t flags, void *holder,
int flush, struct block_device **bdev,
struct buffer_head **bh)
{
int ret;
*bdev = blkdev_get_by_path(device_path, flags, holder);
if (IS_ERR(*bdev)) {
ret = PTR_ERR(*bdev);
goto error;
}
if (flush)
filemap_write_and_wait((*bdev)->bd_inode->i_mapping);
ret = set_blocksize(*bdev, 4096);
if (ret) {
blkdev_put(*bdev, flags);
goto error;
}
invalidate_bdev(*bdev);
*bh = btrfs_read_dev_super(*bdev);
if (IS_ERR(*bh)) {
ret = PTR_ERR(*bh);
blkdev_put(*bdev, flags);
goto error;
}
return 0;
error:
*bdev = NULL;
*bh = NULL;
return ret;
}
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| Total | 174 | 100.00% | 2 | 100.00% |
static void requeue_list(struct btrfs_pending_bios *pending_bios,
struct bio *head, struct bio *tail)
{
struct bio *old_head;
old_head = pending_bios->head;
pending_bios->head = head;
if (pending_bios->tail)
tail->bi_next = old_head;
else
pending_bios->tail = tail;
}
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| Total | 57 | 100.00% | 1 | 100.00% |
/*
* we try to collect pending bios for a device so we don't get a large
* number of procs sending bios down to the same device. This greatly
* improves the schedulers ability to collect and merge the bios.
*
* But, it also turns into a long list of bios to process and that is sure
* to eventually make the worker thread block. The solution here is to
* make some progress and then put this work struct back at the end of
* the list if the block device is congested. This way, multiple devices
* can make progress from a single worker thread.
*/
static noinline void run_scheduled_bios(struct btrfs_device *device)
{
struct btrfs_fs_info *fs_info = device->fs_info;
struct bio *pending;
struct backing_dev_info *bdi;
struct btrfs_pending_bios *pending_bios;
struct bio *tail;
struct bio *cur;
int again = 0;
unsigned long num_run;
unsigned long batch_run = 0;
unsigned long limit;
unsigned long last_waited = 0;
int force_reg = 0;
int sync_pending = 0;
struct blk_plug plug;
/*
* this function runs all the bios we've collected for
* a particular device. We don't want to wander off to
* another device without first sending all of these down.
* So, setup a plug here and finish it off before we return
*/
blk_start_plug(&plug);
bdi = blk_get_backing_dev_info(device->bdev);
limit = btrfs_async_submit_limit(fs_info);
limit = limit * 2 / 3;
loop:
spin_lock(&device->io_lock);
loop_lock:
num_run = 0;
/* take all the bios off the list at once and process them
* later on (without the lock held). But, remember the
* tail and other pointers so the bios can be properly reinserted
* into the list if we hit congestion
*/
if (!force_reg && device->pending_sync_bios.head) {
pending_bios = &device->pending_sync_bios;
force_reg = 1;
} else {
pending_bios = &device->pending_bios;
force_reg = 0;
}
pending = pending_bios->head;
tail = pending_bios->tail;
WARN_ON(pending && !tail);
/*
* if pending was null this time around, no bios need processing
* at all and we can stop. Otherwise it'll loop back up again
* and do an additional check so no bios are missed.
*
* device->running_pending is used to synchronize with the
* schedule_bio code.
*/
if (device->pending_sync_bios.head == NULL &&
device->pending_bios.head == NULL) {
again = 0;
device->running_pending = 0;
} else {
again = 1;
device->running_pending = 1;
}
pending_bios->head = NULL;
pending_bios->tail = NULL;
spin_unlock(&device->io_lock);
while (pending) {
rmb();
/* we want to work on both lists, but do more bios on the
* sync list than the regular list
*/
if ((num_run > 32 &&
pending_bios != &device->pending_sync_bios &&
device->pending_sync_bios.head) ||
(num_run > 64 && pending_bios == &device->pending_sync_bios &&
device->pending_bios.head)) {
spin_lock(&device->io_lock);
requeue_list(pending_bios, pending, tail);
goto loop_lock;
}
cur = pending;
pending = pending->bi_next;
cur->bi_next = NULL;
/*
* atomic_dec_return implies a barrier for waitqueue_active
*/
if (atomic_dec_return(&fs_info->nr_async_bios) < limit &&
waitqueue_active(&fs_info->async_submit_wait))
wake_up(&fs_info->async_submit_wait);
BUG_ON(atomic_read(&cur->__bi_cnt) == 0);
/*
* if we're doing the sync list, record that our
* plug has some sync requests on it
*
* If we're doing the regular list and there are
* sync requests sitting around, unplug before
* we add more
*/
if (pending_bios == &device->pending_sync_bios) {
sync_pending = 1;
} else if (sync_pending) {
blk_finish_plug(&plug);
blk_start_plug(&plug);
sync_pending = 0;
}
btrfsic_submit_bio(cur);
num_run++;
batch_run++;
cond_resched();
/*
* we made progress, there is more work to do and the bdi
* is now congested. Back off and let other work structs
* run instead
*/
if (pending && bdi_write_congested(bdi) && batch_run > 8 &&
fs_info->fs_devices->open_devices > 1) {
struct io_context *ioc;
ioc = current->io_context;
/*
* the main goal here is that we don't want to
* block if we're going to be able to submit
* more requests without blocking.
*
* This code does two great things, it pokes into
* the elevator code from a filesystem _and_
* it makes assumptions about how batching works.
*/
if (ioc && ioc->nr_batch_requests > 0 &&
time_before(jiffies, ioc->last_waited + HZ/50UL) &&
(last_waited == 0 ||
ioc->last_waited == last_waited)) {
/*
* we want to go through our batch of
* requests and stop. So, we copy out
* the ioc->last_waited time and test
* against it before looping
*/
last_waited = ioc->last_waited;
cond_resched();
continue;
}
spin_lock(&device->io_lock);
requeue_list(pending_bios, pending, tail);
device->running_pending = 1;
spin_unlock(&device->io_lock);
btrfs_queue_work(fs_info->submit_workers,
&device->work);
goto done;
}
/* unplug every 64 requests just for good measure */
if (batch_run % 64 == 0) {
blk_finish_plug(&plug);
blk_start_plug(&plug);
sync_pending = 0;
}
}
cond_resched();
if (again)
goto loop;
spin_lock(&device->io_lock);
if (device->pending_bios.head || device->pending_sync_bios.head)
goto loop_lock;
spin_unlock(&device->io_lock);
done:
blk_finish_plug(&plug);
}
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| chris mason | chris mason | 625 | 96.75% | 17 | 68.00% |
| jeff mahoney | jeff mahoney | 10 | 1.55% | 2 | 8.00% |
| qu wenruo | qu wenruo | 5 | 0.77% | 1 | 4.00% |
| miao xie | miao xie | 2 | 0.31% | 1 | 4.00% |
| stefan behrens | stefan behrens | 1 | 0.15% | 1 | 4.00% |
| josef bacik | josef bacik | 1 | 0.15% | 1 | 4.00% |
| david sterba | david sterba | 1 | 0.15% | 1 | 4.00% |
| jens axboe | jens axboe | 1 | 0.15% | 1 | 4.00% |
| Total | 646 | 100.00% | 25 | 100.00% |
static void pending_bios_fn(struct btrfs_work *work)
{
struct btrfs_device *device;
device = container_of(work, struct btrfs_device, work);
run_scheduled_bios(device);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chris mason | chris mason | 32 | 96.97% | 1 | 50.00% |
| christoph hellwig | christoph hellwig | 1 | 3.03% | 1 | 50.00% |
| Total | 33 | 100.00% | 2 | 100.00% |
void btrfs_free_stale_device(struct btrfs_device *cur_dev)
{
struct btrfs_fs_devices *fs_devs;
struct btrfs_device *dev;
if (!cur_dev->name)
return;
list_for_each_entry(fs_devs, &fs_uuids, list) {
int del = 1;
if (fs_devs->opened)
continue;
if (fs_devs->seeding)
continue;
list_for_each_entry(dev, &fs_devs->devices, dev_list) {
if (dev == cur_dev)
continue;
if (!dev->name)
continue;
/*
* Todo: This won't be enough. What if the same device
* comes back (with new uuid and) with its mapper path?
* But for now, this does help as mostly an admin will
* either use mapper or non mapper path throughout.
*/
rcu_read_lock();
del = strcmp(rcu_str_deref(dev->name),
rcu_str_deref(cur_dev->name));
rcu_read_unlock();
if (!del)
break;
}
if (!del) {
/* delete the stale device */
if (fs_devs->num_devices == 1) {
btrfs_sysfs_remove_fsid(fs_devs);
list_del(&fs_devs->list);
free_fs_devices(fs_devs);
} else {
fs_devs->num_devices--;
list_del(&dev->dev_list);
rcu_string_free(dev->name);
kfree(dev);
}
break;
}
}
}
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| anand jain | anand jain | 179 | 100.00% | 1 | 100.00% |
| Total | 179 | 100.00% | 1 | 100.00% |
/*
* Add new device to list of registered devices
*
* Returns:
* 1 - first time device is seen
* 0 - device already known
* < 0 - error
*/
static noinline int device_list_add(const char *path,
struct btrfs_super_block *disk_super,
u64 devid, struct btrfs_fs_devices **fs_devices_ret)
{
struct btrfs_device *device;
struct btrfs_fs_devices *fs_devices;
struct rcu_string *name;
int ret = 0;
u64 found_transid = btrfs_super_generation(disk_super);
fs_devices = find_fsid(disk_super->fsid);
if (!fs_devices) {
fs_devices = alloc_fs_devices(disk_super->fsid);
if (IS_ERR(fs_devices))
return PTR_ERR(fs_devices);
list_add(&fs_devices->list, &fs_uuids);
device = NULL;
} else {
device = __find_device(&fs_devices->devices, devid,
disk_super->dev_item.uuid);
}
if (!device) {
if (fs_devices->opened)
return -EBUSY;
device = btrfs_alloc_device(NULL, &devid,
disk_super->dev_item.uuid);
if (IS_ERR(device)) {
/* we can safely leave the fs_devices entry around */
return PTR_ERR(device);
}
name = rcu_string_strdup(path, GFP_NOFS);
if (!name) {
kfree(device);
return -ENOMEM;
}
rcu_assign_pointer(device->name, name);
mutex_lock(&fs_devices->device_list_mutex);
list_add_rcu(&device->dev_list, &fs_devices->devices);
fs_devices->num_devices++;
mutex_unlock(&fs_devices->device_list_mutex);
ret = 1;
device->fs_devices = fs_devices;
} else if (!device->name || strcmp(device->name->str, path)) {
/*
* When FS is already mounted.
* 1. If you are here and if the device->name is NULL that
* means this device was missing at time of FS mount.
* 2. If you are here and if the device->name is different
* from 'path' that means either
* a. The same device disappeared and reappeared with
* different name. or
* b. The missing-disk-which-was-replaced, has
* reappeared now.
*
* We must allow 1 and 2a above. But 2b would be a spurious
* and unintentional.
*
* Further in case of 1 and 2a above, the disk at 'path'
* would have missed some transaction when it was away and
* in case of 2a the stale bdev has to be updated as well.
* 2b must not be allowed at all time.
*/
/*
* For now, we do allow update to btrfs_fs_device through the
* btrfs dev scan cli after FS has been mounted. We're still
* tracking a problem where systems fail mount by subvolume id
* when we reject replacement on a mounted FS.
*/
if (!fs_devices->opened && found_transid < device->generation) {
/*
* That is if the FS is _not_ mounted and if you
* are here, that means there is more than one
* disk with same uuid and devid.We keep the one
* with larger generation number or the last-in if
* generation are equal.
*/
return -EEXIST;
}
name = rcu_string_strdup(path, GFP_NOFS);
if (!name)
return -ENOMEM;
rcu_string_free(device->name);
rcu_assign_pointer(device->name, name);
if (device->missing) {
fs_devices->missing_devices--;
device->missing = 0;
}
}
/*
* Unmount does not free the btrfs_device struct but would zero
* generation along with most of the other members. So just update
* it back. We need it to pick the disk with largest generation
* (as above).
*/
if (!fs_devices->opened)
device->generation = found_transid;
/*
* if there is new btrfs on an already registered device,
* then remove the stale device entry.
*/
if (ret > 0)
btrfs_free_stale_device(device);
*fs_devices_ret = fs_devices;
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chris mason | chris mason | 196 | 50.91% | 8 | 38.10% |
| anand jain | anand jain | 43 | 11.17% | 4 | 19.05% |
| taruisi hiroaki | taruisi hiroaki | 42 | 10.91% | 1 | 4.76% |
| zheng yan | zheng yan | 42 | 10.91% | 2 | 9.52% |
| josef bacik | josef bacik | 23 | 5.97% | 1 | 4.76% |
| ilya dryomov | ilya dryomov | 23 | 5.97% | 2 | 9.52% |
| david sterba | david sterba | 10 | 2.60% | 1 | 4.76% |
| filipe david borba manana | filipe david borba manana | 5 | 1.30% | 1 | 4.76% |
| xiao guangrong | xiao guangrong | 1 | 0.26% | 1 | 4.76% |
| Total | 385 | 100.00% | 21 | 100.00% |
static struct btrfs_fs_devices *clone_fs_devices(struct btrfs_fs_devices *orig)
{
struct btrfs_fs_devices *fs_devices;
struct btrfs_device *device;
struct btrfs_device *orig_dev;
fs_devices = alloc_fs_devices(orig->fsid);
if (IS_ERR(fs_devices))
return fs_devices;
mutex_lock(&orig->device_list_mutex);
fs_devices->total_devices = orig->total_devices;
/* We have held the volume lock, it is safe to get the devices. */
list_for_each_entry(orig_dev, &orig->devices, dev_list) {
struct rcu_string *name;
device = btrfs_alloc_device(NULL, &orig_dev->devid,
orig_dev->uuid);
if (IS_ERR(device))
goto error;
/*
* This is ok to do without rcu read locked because we hold the
* uuid mutex so nothing we touch in here is going to disappear.
*/
if (orig_dev->name) {
name = rcu_string_strdup(orig_dev->name->str,
GFP_KERNEL);
if (!name) {
kfree(device);
goto error;
}
rcu_assign_pointer(device->name, name);
}
list_add(&device->dev_list, &fs_devices->devices);
device->fs_devices = fs_devices;
fs_devices->num_devices++;
}
mutex_unlock(&orig->device_list_mutex);
return fs_devices;
error:
mutex_unlock(&orig->device_list_mutex);
free_fs_devices(fs_devices);
return ERR_PTR(-ENOMEM);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| zheng yan | zheng yan | 99 | 47.60% | 2 | 13.33% |
| josef bacik | josef bacik | 26 | 12.50% | 2 | 13.33% |
| chris mason | chris mason | 24 | 11.54% | 4 | 26.67% |
| miao xie | miao xie | 21 | 10.10% | 1 | 6.67% |
| ilya dryomov | ilya dryomov | 21 | 10.10% | 2 | 13.33% |
| anand jain | anand jain | 8 | 3.85% | 1 | 6.67% |
| julia lawall | julia lawall | 7 | 3.37% | 1 | 6.67% |
| xiao guangrong | xiao guangrong | 1 | 0.48% | 1 | 6.67% |
| david sterba | david sterba | 1 | 0.48% | 1 | 6.67% |
| Total | 208 | 100.00% | 15 | 100.00% |
void btrfs_close_extra_devices(struct btrfs_fs_devices *fs_devices, int step)
{
struct btrfs_device *device, *next;
struct btrfs_device *latest_dev = NULL;
mutex_lock(&uuid_mutex);
again:
/* This is the initialized path, it is safe to release the devices. */
list_for_each_entry_safe(device, next, &fs_devices->devices, dev_list) {
if (device->in_fs_metadata) {
if (!device->is_tgtdev_for_dev_replace &&
(!latest_dev ||
device->generation > latest_dev->generation)) {
latest_dev = device;
}
continue;
}
if (device->devid == BTRFS_DEV_REPLACE_DEVID) {
/*
* In the first step, keep the device which has
* the correct fsid and the devid that is used
* for the dev_replace procedure.
* In the second step, the dev_replace state is
* read from the device tree and it is known
* whether the procedure is really active or
* not, which means whether this device is
* used or whether it should be removed.
*/
if (step == 0 || device->is_tgtdev_for_dev_replace) {
continue;
}
}
if (device->bdev) {
blkdev_put(device->bdev, device->mode);
device->bdev = NULL;
fs_devices->open_devices--;
}
if (device->writeable) {
list_del_init(&device->dev_alloc_list);
device->writeable = 0;
if (!device->is_tgtdev_for_dev_replace)
fs_devices->rw_devices--;
}
list_del_init(&device->dev_list);
fs_devices->num_devices--;
rcu_string_free(device->name);
kfree(device);
}
if (fs_devices->seed) {
fs_devices = fs_devices->seed;
goto again;
}
fs_devices->latest_bdev = latest_dev->bdev;
mutex_unlock(&uuid_mutex);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chris mason | chris mason | 115 | 50.44% | 6 | 40.00% |
| zheng yan | zheng yan | 51 | 22.37% | 1 | 6.67% |
| stefan behrens | stefan behrens | 41 | 17.98% | 2 | 13.33% |
| miao xie | miao xie | 9 | 3.95% | 1 | 6.67% |
| qinghuang feng | qinghuang feng | 8 | 3.51% | 1 | 6.67% |
| josef bacik | josef bacik | 1 | 0.44% | 1 | 6.67% |
| tejun heo | tejun heo | 1 | 0.44% | 1 | 6.67% |
| xiao guangrong | xiao guangrong | 1 | 0.44% | 1 | 6.67% |
| jeff mahoney | jeff mahoney | 1 | 0.44% | 1 | 6.67% |
| Total | 228 | 100.00% | 15 | 100.00% |
static void __free_device(struct work_struct *work)
{
struct btrfs_device *device;
device = container_of(work, struct btrfs_device, rcu_work);
rcu_string_free(device->name);
kfree(device);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| xiao guangrong | xiao guangrong | 39 | 97.50% | 1 | 50.00% |
| josef bacik | josef bacik | 1 | 2.50% | 1 | 50.00% |
| Total | 40 | 100.00% | 2 | 100.00% |
static void free_device(struct rcu_head *head)
{
struct btrfs_device *device;
device = container_of(head, struct btrfs_device, rcu);
INIT_WORK(&device->rcu_work, __free_device);
schedule_work(&device->rcu_work);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| xiao guangrong | xiao guangrong | 46 | 100.00% | 1 | 100.00% |
| Total | 46 | 100.00% | 1 | 100.00% |
static void btrfs_close_bdev(struct btrfs_device *device)
{
if (device->bdev && device->writeable) {
sync_blockdev(device->bdev);
invalidate_bdev(device->bdev);
}
if (device->bdev)
blkdev_put(device->bdev, device->mode);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| anand jain | anand jain | 54 | 100.00% | 1 | 100.00% |
| Total | 54 | 100.00% | 1 | 100.00% |
static void btrfs_prepare_close_one_device(struct btrfs_device *device)
{
struct btrfs_fs_devices *fs_devices = device->fs_devices;
struct btrfs_device *new_device;
struct rcu_string *name;
if (device->bdev)
fs_devices->open_devices--;
if (device->writeable &&
device->devid != BTRFS_DEV_REPLACE_DEVID) {
list_del_init(&device->dev_alloc_list);
fs_devices->rw_devices--;
}
if (device->missing)
fs_devices->missing_devices--;
new_device = btrfs_alloc_device(NULL, &device->devid,
device->uuid);
BUG_ON(IS_ERR(new_device)); /* -ENOMEM */
/* Safe because we are under uuid_mutex */
if (device->name) {
name = rcu_string_strdup(device->name->str, GFP_NOFS);
BUG_ON(!name); /* -ENOMEM */
rcu_assign_pointer(new_device->name, name);
}
list_replace_rcu(&device->dev_list, &new_device->dev_list);
new_device->fs_devices = device->fs_devices;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| anand jain | anand jain | 163 | 100.00% | 2 | 100.00% |
| Total | 163 | 100.00% | 2 | 100.00% |
static int __btrfs_close_devices(struct btrfs_fs_devices *fs_devices)
{
struct btrfs_device *device, *tmp;
struct list_head pending_put;
INIT_LIST_HEAD(&pending_put);
if (--fs_devices->opened > 0)
return 0;
mutex_lock(&fs_devices->device_list_mutex);
list_for_each_entry_safe(device, tmp, &fs_devices->devices, dev_list) {
btrfs_prepare_close_one_device(device);
list_add(&device->dev_list, &pending_put);
}
mutex_unlock(&fs_devices->device_list_mutex);
/*
* btrfs_show_devname() is using the device_list_mutex,
* sometimes call to blkdev_put() leads vfs calling
* into this func. So do put outside of device_list_mutex,
* as of now.
*/
while (!list_empty(&pending_put)) {
device = list_first_entry(&pending_put,
struct btrfs_device, dev_list);
list_del(&device->dev_list);
btrfs_close_bdev(device);
call_rcu(&device->rcu, free_device);
}
WARN_ON(fs_devices->open_devices);
WARN_ON(fs_devices->rw_devices);
fs_devices->opened = 0;
fs_devices->seeding = 0;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| anand jain | anand jain | 70 | 43.21% | 1 | 11.11% |
| zheng yan | zheng yan | 43 | 26.54% | 2 | 22.22% |
| chris mason | chris mason | 22 | 13.58% | 2 | 22.22% |
| xiao guangrong | xiao guangrong | 18 | 11.11% | 2 | 22.22% |
| sasha levin | sasha levin | 6 | 3.70% | 1 | 11.11% |
| qinghuang feng | qinghuang feng | 3 | 1.85% | 1 | 11.11% |
| Total | 162 | 100.00% | 9 | 100.00% |
int btrfs_close_devices(struct btrfs_fs_devices *fs_devices)
{
struct btrfs_fs_devices *seed_devices = NULL;
int ret;
mutex_lock(&uuid_mutex);
ret = __btrfs_close_devices(fs_devices);
if (!fs_devices->opened) {
seed_devices = fs_devices->seed;
fs_devices->seed = NULL;
}
mutex_unlock(&uuid_mutex);
while (seed_devices) {
fs_devices = seed_devices;
seed_devices = fs_devices->seed;
__btrfs_close_devices(fs_devices);
free_fs_devices(fs_devices);
}
/*
* Wait for rcu kworkers under __btrfs_close_devices
* to finish all blkdev_puts so device is really
* free when umount is done.
*/
rcu_barrier();
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| zheng yan | zheng yan | 79 | 84.95% | 2 | 40.00% |
| chris mason | chris mason | 10 | 10.75% | 2 | 40.00% |
| eric sandeen | eric sandeen | 4 | 4.30% | 1 | 20.00% |
| Total | 93 | 100.00% | 5 | 100.00% |
static int __btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
fmode_t flags, void *holder)
{
struct request_queue *q;
struct block_device *bdev;
struct list_head *head = &fs_devices->devices;
struct btrfs_device *device;
struct btrfs_device *latest_dev = NULL;
struct buffer_head *bh;
struct btrfs_super_block *disk_super;
u64 devid;
int seeding = 1;
int ret = 0;
flags |= FMODE_EXCL;
list_for_each_entry(device, head, dev_list) {
if (device->bdev)
continue;
if (!device->name)
continue;
/* Just open everything we can; ignore failures here */
if (btrfs_get_bdev_and_sb(device->name->str, flags, holder, 1,
&bdev, &bh))
continue;
disk_super = (struct btrfs_super_block *)bh->b_data;
devid = btrfs_stack_device_id(&disk_super->dev_item);
if (devid != device->devid)
goto error_brelse;
if (memcmp(device->uuid, disk_super->dev_item.uuid,
BTRFS_UUID_SIZE))
goto error_brelse;
device->generation = btrfs_super_generation(disk_super);
if (!latest_dev ||
device->generation > latest_dev->generation)
latest_dev = device;
if (btrfs_super_flags(disk_super) & BTRFS_SUPER_FLAG_SEEDING) {
device->writeable = 0;
} else {
device->writeable = !bdev_read_only(bdev);
seeding = 0;
}
q = bdev_get_queue(bdev);
if (blk_queue_discard(q))
device->can_discard = 1;
device->bdev = bdev;
device->in_fs_metadata = 0;
device->mode = flags;
if (!blk_queue_nonrot(bdev_get_queue(bdev)))
fs_devices->rotating = 1;
fs_devices->open_devices++;
if (device->writeable &&
device->devid != BTRFS_DEV_REPLACE_DEVID) {
fs_devices->rw_devices++;
list_add(&device->dev_alloc_list,
&fs_devices->alloc_list);
}
brelse(bh);
continue;
error_brelse:
brelse(bh);
blkdev_put(bdev, flags);
continue;
}
if (fs_devices->open_devices == 0) {
ret = -EINVAL;
goto out;
}
fs_devices->seeding = seeding;
fs_devices->opened = 1;
fs_devices->latest_bdev = latest_dev->bdev;
fs_devices->total_rw_bytes = 0;
out:
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chris mason | chris mason | 223 | 55.61% | 8 | 32.00% |
| zheng yan | zheng yan | 108 | 26.93% | 2 | 8.00% |
| josef bacik | josef bacik | 27 | 6.73% | 2 | 8.00% |
| stefan behrens | stefan behrens | 9 | 2.24% | 2 | 8.00% |
| miao xie | miao xie | 9 | 2.24% | 1 | 4.00% |
| xiao guangrong | xiao guangrong | 7 | 1.75% | 2 | 8.00% |
| tejun heo | tejun heo | 6 | 1.50% | 3 | 12.00% |
| qinghuang feng | qinghuang feng | 4 | 1.00% | 1 | 4.00% |
| ilya dryomov | ilya dryomov | 4 | 1.00% | 2 | 8.00% |
| eric sandeen | eric sandeen | 3 | 0.75% | 1 | 4.00% |
| christoph hellwig | christoph hellwig | 1 | 0.25% | 1 | 4.00% |
| Total | 401 | 100.00% | 25 | 100.00% |
int btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
fmode_t flags, void *holder)
{
int ret;
mutex_lock(&uuid_mutex);
if (fs_devices->opened) {
fs_devices->opened++;
ret = 0;
} else {
ret = __btrfs_open_devices(fs_devices, flags, holder);
}
mutex_unlock(&uuid_mutex);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| zheng yan | zheng yan | 49 | 74.24% | 1 | 25.00% |
| chris mason | chris mason | 16 | 24.24% | 2 | 50.00% |
| christoph hellwig | christoph hellwig | 1 | 1.52% | 1 | 25.00% |
| Total | 66 | 100.00% | 4 | 100.00% |
void btrfs_release_disk_super(struct page *page)
{
kunmap(page);
put_page(page);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| anand jain | anand jain | 15 | 75.00% | 1 | 50.00% |
| zheng yan | zheng yan | 5 | 25.00% | 1 | 50.00% |
| Total | 20 | 100.00% | 2 | 100.00% |
int btrfs_read_disk_super(struct block_device *bdev, u64 bytenr,
struct page **page, struct btrfs_super_block **disk_super)
{
void *p;
pgoff_t index;
/* make sure our super fits in the device */
if (bytenr + PAGE_SIZE >= i_size_read(bdev->bd_inode))
return 1;
/* make sure our super fits in the page */
if (sizeof(**disk_super) > PAGE_SIZE)
return 1;
/* make sure our super doesn't straddle pages on disk */
index = bytenr >> PAGE_SHIFT;
if ((bytenr + sizeof(**disk_super) - 1) >> PAGE_SHIFT != index)
return 1;
/* pull in the page with our super */
*page = read_cache_page_gfp(bdev->bd_inode->i_mapping,
index, GFP_KERNEL);
if (IS_ERR_OR_NULL(*page))
return 1;
p = kmap(*page);
/* align our pointer to the offset of the super block */
*disk_super = p + (bytenr & ~PAGE_MASK);
if (btrfs_super_bytenr(*disk_super) != bytenr ||
btrfs_super_magic(*disk_super) != BTRFS_MAGIC) {
btrfs_release_disk_super(*page);
return 1;
}
if ((*disk_super)->label[0] &&
(*disk_super)->label[BTRFS_LABEL_SIZE - 1])
(*disk_super)->label[BTRFS_LABEL_SIZE - 1] = '\0';
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| david sterba | david sterba | 95 | 44.81% | 1 | 10.00% |
| anand jain | anand jain | 86 | 40.57% | 1 | 10.00% |
| chris mason | chris mason | 12 | 5.66% | 2 | 20.00% |
| zheng yan | zheng yan | 7 | 3.30% | 1 | 10.00% |
| kirill a. shutemov | kirill a. shutemov | 5 | 2.36% | 1 | 10.00% |
| qu wenruo | qu wenruo | 3 | 1.42% | 1 | 10.00% |
| zach brown | zach brown | 2 | 0.94% | 1 | 10.00% |
| josef bacik | josef bacik | 1 | 0.47% | 1 | 10.00% |
| stefan behrens | stefan behrens | 1 | 0.47% | 1 | 10.00% |
| Total | 212 | 100.00% | 10 | 100.00% |
/*
* Look for a btrfs signature on a device. This may be called out of the mount path
* and we are not allowed to call set_blocksize during the scan. The superblock
* is read via pagecache
*/
int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder,
struct btrfs_fs_devices **fs_devices_ret)
{
struct btrfs_super_block *disk_super;
struct block_device *bdev;
struct page *page;
int ret = -EINVAL;
u64 devid;
u64 transid;
u64 total_devices;
u64 bytenr;
/*
* we would like to check all the supers, but that would make
* a btrfs mount succeed after a mkfs from a different FS.
* So, we need to add a special mount option to scan for
* later supers, using BTRFS_SUPER_MIRROR_MAX instead
*/
bytenr = btrfs_sb_offset(0);
flags |= FMODE_EXCL;
mutex_lock(&uuid_mutex);
bdev = blkdev_get_by_path(path, flags, holder);
if (IS_ERR(bdev)) {
ret = PTR_ERR(bdev);
goto error;
}
if (btrfs_read_disk_super(bdev, bytenr, &page, &disk_super))
goto error_bdev_put;
devid = btrfs_stack_device_id(&disk_super->dev_item);
transid = btrfs_super_generation(disk_super);
total_devices = btrfs_super_num_devices(disk_super);
ret = device_list_add(path, disk_super, devid, fs_devices_ret);
if (ret > 0) {
if (disk_super->label[0]) {
pr_info("BTRFS: device label %s ", disk_super->label);
} else {
pr_info("BTRFS: device fsid %pU ", disk_super->fsid);
}
pr_cont("devid %llu transid %llu %s\n", devid, transid, path);
ret = 0;
}
if (!ret && fs_devices_ret)
(*fs_devices_ret)->total_devices = total_devices;
btrfs_release_disk_super(page);
error_bdev_put:
blkdev_put(bdev, flags);
error:
mutex_unlock(&uuid_mutex);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| anand jain | anand jain | 120 | 47.06% | 1 | 6.67% |
| chris mason | chris mason | 64 | 25.10% | 5 | 33.33% |
| david sterba | david sterba | 30 | 11.76% | 2 | 13.33% |
| josef bacik | josef bacik | 23 | 9.02% | 1 | 6.67% |
| stefan behrens | stefan behrens | 10 | 3.92% | 2 | 13.33% |
| jeff mahoney | jeff mahoney | 3 | 1.18% | 1 | 6.67% |
| xiao guangrong | xiao guangrong | 2 | 0.78% | 1 | 6.67% |
| frank holton | frank holton | 2 | 0.78% | 1 | 6.67% |
| tejun heo | tejun heo | 1 | 0.39% | 1 | 6.67% |
| Total | 255 | 100.00% | 15 | 100.00% |
/* helper to account the used device space in the range */
int btrfs_account_dev_extents_size(struct btrfs_device *device, u64 start,
u64 end, u64 *length)
{
struct btrfs_key key;
struct btrfs_root *root = device->fs_info->dev_root;
struct btrfs_dev_extent *dev_extent;
struct btrfs_path *path;
u64 extent_end;
int ret;
int slot;
struct extent_buffer *l;
*length = 0;
if (start >= device->total_bytes || device->is_tgtdev_for_dev_replace)
return 0;
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
path->reada = READA_FORWARD;
key.objectid = device->devid;
key.offset = start;
key.type = BTRFS_DEV_EXTENT_KEY;
ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
if (ret < 0)
goto out;
if (ret > 0) {
ret = btrfs_previous_item(root, path, key.objectid, key.type);
if (ret < 0)
goto out;
}
while (1) {
l = path->nodes[0];
slot = path->slots[0];
if (slot >= btrfs_header_nritems(l)) {
ret = btrfs_next_leaf(root, path);
if (ret == 0)
continue;
if (ret < 0)
goto out;
break;
}
btrfs_item_key_to_cpu(l, &key, slot);
if (key.objectid < device->devid)
goto next;
if (key.objectid > device->devid)
break;
if (key.type != BTRFS_DEV_EXTENT_KEY)
goto next;
dev_extent = btrfs_item_ptr(l, slot, struct btrfs_dev_extent);
extent_end = key.offset + btrfs_dev_extent_length(l,
dev_extent);
if (key.offset <= start && extent_end > end) {
*length = end - start + 1;
break;
} else if (key.offset <= start && extent_end > start)
*length += extent_end - start;
else if (key.offset > start && extent_end <= end)
*length += extent_end - key.offset;
else if (key.offset > start && key.offset <= end) {
*length += end - key.offset + 1;
break;
} else if (key.offset > end)
break;
next:
path->slots[0]++;
}
ret = 0;
out:
btrfs_free_path(path);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chris mason | chris mason | 269 | 61.14% | 2 | 22.22% |
| miao xie | miao xie | 130 | 29.55% | 1 | 11.11% |
| zheng yan | zheng yan | 32 | 7.27% | 2 | 22.22% |
| stefan behrens | stefan behrens | 4 | 0.91% | 1 | 11.11% |
| david sterba | david sterba | 3 | 0.68% | 2 | 22.22% |
| jeff mahoney | jeff mahoney | 2 | 0.45% | 1 | 11.11% |
| Total | 440 | 100.00% | 9 | 100.00% |
static int contains_pending_extent(struct btrfs_transaction *transaction,
struct btrfs_device *device,
u64 *start, u64 len)
{
struct btrfs_fs_info *fs_info = device->fs_info;
struct extent_map *em;
struct list_head *search_list = &fs_info->pinned_chunks;
int ret = 0;
u64 physical_start = *start;
if (transaction)
search_list = &transaction->pending_chunks;
again:
list_for_each_entry(em, search_list, list) {
struct map_lookup *map;
int i;
map = em->map_lookup;
for (i = 0; i < map->num_stripes; i++) {
u64 end;
if (map->stripes[i].dev != device)
continue;
if (map->stripes[i].physical >= physical_start + len ||
map->stripes[i].physical + em->orig_block_len <=
physical_start)
continue;
/*
* Make sure that while processing the pinned list we do
* not override our *start with a lower value, because
* we can have pinned chunks that fall within this
* device hole and that have lower physical addresses
* than the pending chunks we processed before. If we
* do not take this special care we can end up getting
* 2 pending chunks that start at the same physical
* device offsets because the end offset of a pinned
* chunk can be equal to the start offset of some
* pending chunk.
*/
end = map->stripes[i].physical + em->orig_block_len;
if (end > *start) {
*start = end;
ret = 1;
}
}
}
if (search_list != &fs_info->pinned_chunks) {
search_list = &fs_info->pinned_chunks;
goto again;
}
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| josef bacik | josef bacik | 134 | 61.47% | 1 | 16.67% |
| filipe david borba manana | filipe david borba manana | 48 | 22.02% | 2 | 33.33% |
| jeff mahoney | jeff mahoney | 28 | 12.84% | 2 | 33.33% |
| forrest liu | forrest liu | 8 | 3.67% | 1 | 16.67% |
| Total | 218 | 100.00% | 6 | 100.00% |
/*
* find_free_dev_extent_start - find free space in the specified device
* @device: the device which we search the free space in
* @num_bytes: the size of the free space that we need
* @search_start: the position from which to begin the search
* @start: store the start of the free space.
* @len: the size of the free space. that we find, or the size
* of the max free space if we don't find suitable free space
*
* this uses a pretty simple search, the expectation is that it is
* called very infrequently and that a given device has a small number
* of extents
*
* @start is used to store the start of the free space if we find. But if we
* don't find suitable free space, it will be used to store the start position
* of the max free space.
*
* @len is used to store the size of the free space that we find.
* But if we don't find suitable free space, it is used to store the size of
* the max free space.
*/
int find_free_dev_extent_start(struct btrfs_transaction *transaction,
struct btrfs_device *device, u64 num_bytes,
u64 search_start, u64 *start, u64 *len)
{
struct btrfs_fs_info *fs_info = device->fs_info;
struct btrfs_root *root = fs_info->dev_root;
struct btrfs_key key;
struct btrfs_dev_extent *dev_extent;
struct btrfs_path *path;
u64 hole_size;
u64 max_hole_start;
u64 max_hole_size;
u64 extent_end;
u64 search_end = device->total_bytes;
int ret;
int slot;
struct extent_buffer *l;
u64 min_search_start;
/*
* We don't want to overwrite the superblock on the drive nor any area
* used by the boot loader (grub for example), so we make sure to start
* at an offset of at least 1MB.
*/
min_search_start = max(fs_info->alloc_start, 1024ull * 1024);
search_start = max(search_start, min_search_start);
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
max_hole_start = search_start;
max_hole_size = 0;
again:
if (search_start >= search_end || device->is_tgtdev_for_dev_replace) {
ret = -ENOSPC;
goto out;
}
path->reada = READA_FORWARD;
path->search_commit_root = 1;
path->skip_locking = 1;
key.objectid = device->devid;
key.offset = search_start;
key.type = BTRFS_DEV_EXTENT_KEY;
ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
if (ret < 0)
goto out;
if (ret > 0) {
ret = btrfs_previous_item(root, path, key.objectid, key.type);
if (ret < 0)
goto out;
}
while (1) {
l = path->nodes[0];
slot = path->slots[0];
if (slot >= btrfs_header_nritems(l)) {
ret = btrfs_next_leaf(root, path);
if (ret == 0)
continue;
if (ret < 0)
goto out;
break;
}
btrfs_item_key_to_cpu(l, &key, slot);
if (key.objectid < device->devid)
goto next;
if (key.objectid > device->devid)
break;
if (key.type != BTRFS_DEV_EXTENT_KEY)
goto next;
if (key.offset > search_start) {
hole_size = key.offset - search_start;
/*
* Have to check before we set max_hole_start, otherwise
* we could end up sending back this offset anyway.
*/
if (contains_pending_extent(transaction, device,
&search_start,
hole_size)) {
if (key.offset >= search_start) {
hole_size = key.offset - search_start;
} else {
WARN_ON_ONCE(1);
hole_size = 0;
}
}
if (hole_size > max_hole_size) {
max_hole_start = search_start;
max_hole_size = hole_size;
}
/*
* If this free space is greater than which we need,
* it must be the max free space that we have found
* until now, so max_hole_start must point to the start
* of this free space and the length of this free space
* is stored in max_hole_size. Thus, we return
* max_hole_start and max_hole_size and go back to the
* caller.
*/
if (hole_size >= num_bytes) {
ret = 0;
goto out;
}
}
dev_extent = btrfs_item_ptr(l, slot, struct btrfs_dev_extent);
extent_end = key.offset + btrfs_dev_extent_length(l,
dev_extent);
if (extent_end > search_start)
search_start = extent_end;
next:
path->slots[0]++;
cond_resched();
}
/*
* At this point, search_start should be the end of
* allocated dev extents, and when shrinking the device,
* search_end may be smaller than search_start.
*/
if (search_end > search_start) {
hole_size = search_end - search_start;
if (contains_pending_extent(transaction, device, &search_start,
hole_size)) {
btrfs_release_path(path);
goto again;
}
if (hole_size > max_hole_size) {
max_hole_start = search_start;
max_hole_size = hole_size;
}
}
/* See above. */
if (max_hole_size < num_bytes)
ret = -ENOSPC;
else
ret = 0;
out:
btrfs_free_path(path);
*start = max_hole_start;
if (len)
*len = max_hole_size;
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chris mason | chris mason | 323 | 53.21% | 5 | 25.00% |
| miao xie | miao xie | 104 | 17.13% | 1 | 5.00% |
| josef bacik | josef bacik | 64 | 10.54% | 1 | 5.00% |
| forrest liu | forrest liu | 28 | 4.61% | 1 | 5.00% |
| filipe david borba manana | filipe david borba manana | 26 | 4.28% | 1 | 5.00% |
| zhao lei | zhao lei | 21 | 3.46% | 1 | 5.00% |
| jeff mahoney | jeff mahoney | 16 | 2.64% | 3 | 15.00% |
| zheng yan | zheng yan | 10 | 1.65% | 2 | 10.00% |
| liu bo | liu bo | 7 | 1.15% | 1 | 5.00% |
| stefan behrens | stefan behrens | 4 | 0.66% | 1 | 5.00% |
| david sterba | david sterba | 3 | 0.49% | 2 | 10.00% |
| li zefan | li zefan | 1 | 0.16% | 1 | 5.00% |
| Total | 607 | 100.00% | 20 | 100.00% |
int find_free_dev_extent(struct btrfs_trans_handle *trans,
struct btrfs_device *device, u64 num_bytes,
u64 *start, u64 *len)
{
/* FIXME use last free of some kind */
return find_free_dev_extent_start(trans->transaction, device,
num_bytes, 0, start, len);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jeff mahoney | jeff mahoney | 44 | 97.78% | 1 | 50.00% |
| filipe david borba manana | filipe david borba manana | 1 | 2.22% | 1 | 50.00% |
| Total | 45 | 100.00% | 2 | 100.00% |
static int btrfs_free_dev_extent(struct btrfs_trans_handle *trans,
struct btrfs_device *device,
u64 start, u64 *dev_extent_len)
{
struct btrfs_fs_info *fs_info = device->fs_info;
struct btrfs_root *root = fs_info->dev_root;
int ret;
struct btrfs_path *path;
struct btrfs_key key;
struct btrfs_key found_key;
struct extent_buffer *leaf = NULL;
struct btrfs_dev_extent *extent = NULL;
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
key.objectid = device->devid;
key.offset = start;
key.type = BTRFS_DEV_EXTENT_KEY;
again:
ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
if (ret > 0) {
ret = btrfs_previous_item(root, path, key.objectid,
BTRFS_DEV_EXTENT_KEY);
if (ret)
goto out;
leaf = path->nodes[0];
btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]);
extent = btrfs_item_ptr(leaf, path->slots[0],
struct btrfs_dev_extent);
BUG_ON(found_key.offset > start || found_key.offset +
btrfs_dev_extent_length(leaf, extent) < start);
key = found_key;
btrfs_release_path(path);
goto again;
} else if (ret == 0) {
leaf = path->nodes[0];
extent = btrfs_item_ptr(leaf, path->slots[0],
struct btrfs_dev_extent);
} else {
btrfs_handle_fs_error(fs_info, ret, "Slot search failed");
goto out;
}
*dev_extent_len = btrfs_dev_extent_length(leaf, extent);
ret = btrfs_del_item(trans, root, path);
if (ret) {
btrfs_handle_fs_error(fs_info, ret,
"Failed to remove dev extent item");
} else {
set_bit(BTRFS_TRANS_HAVE_FREE_BGS, &trans->transaction->flags);
}
out:
btrfs_free_path(path);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chris mason | chris mason | 258 | 75.44% | 4 | 26.67% |
| jeff mahoney | jeff mahoney | 36 | 10.53% | 3 | 20.00% |
| miao xie | miao xie | 21 | 6.14% | 2 | 13.33% |
| zhao lei | zhao lei | 8 | 2.34% | 1 | 6.67% |
| tsutomu itoh | tsutomu itoh | 8 | 2.34% | 1 | 6.67% |
| josef bacik | josef bacik | 7 | 2.05% | 1 | 6.67% |
| anand jain | anand jain | 2 | 0.58% | 1 | 6.67% |
| christoph hellwig | christoph hellwig | 1 | 0.29% | 1 | 6.67% |
| zheng yan | zheng yan | 1 | 0.29% | 1 | 6.67% |
| Total | 342 | 100.00% | 15 | 100.00% |
static int btrfs_alloc_dev_extent(struct btrfs_trans_handle *trans,
struct btrfs_device *device,
u64 chunk_tree, u64 chunk_objectid,
u64 chunk_offset, u64 start, u64 num_bytes)
{
int ret;
struct btrfs_path *path;
struct btrfs_fs_info *fs_info = device->fs_info;
struct btrfs_root *root = fs_info->dev_root;
struct btrfs_dev_extent *extent;
struct extent_buffer *leaf;
struct btrfs_key key;
WARN_ON(!device->in_fs_metadata);
WARN_ON(device->is_tgtdev_for_dev_replace);
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
key.objectid = device->devid;
key.offset = start;
key.type = BTRFS_DEV_EXTENT_KEY;
ret = btrfs_insert_empty_item(trans, root, path, &key,
sizeof(*extent));
if (ret)
goto out;
leaf = path->nodes[0];
extent = btrfs_item_ptr(leaf, path->slots[0],
struct btrfs_dev_extent);
btrfs_set_dev_extent_chunk_tree(leaf, extent, chunk_tree);
btrfs_set_dev_extent_chunk_objectid(leaf, extent, chunk_objectid);
btrfs_set_dev_extent_chunk_offset(leaf, extent, chunk_offset);
write_extent_buffer_chunk_tree_uuid(leaf, fs_info->chunk_tree_uuid);
btrfs_set_dev_extent_length(leaf, extent, num_bytes);
btrfs_mark_buffer_dirty(leaf);
out:
btrfs_free_path(path);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chris mason | chris mason | 208 | 89.27% | 3 | 30.00% |
| mark fasheh | mark fasheh | 8 | 3.43% | 1 | 10.00% |
| stefan behrens | stefan behrens | 7 | 3.00% | 1 | 10.00% |
| jeff mahoney | jeff mahoney | 6 | 2.58% | 2 | 20.00% |
| zheng yan | zheng yan | 2 | 0.86% | 1 | 10.00% |
| david sterba | david sterba | 1 | 0.43% | 1 | 10.00% |
| eric sandeen | eric sandeen | 1 | 0.43% | 1 | 10.00% |
| Total | 233 | 100.00% | 10 | 100.00% |
static u64 find_next_chunk(struct btrfs_fs_info *fs_info)
{
struct extent_map_tree *em_tree;
struct extent_map *em;
struct rb_node *n;
u64 ret = 0;
em_tree = &fs_info->mapping_tree.map_tree;
read_lock(&em_tree->lock);
n = rb_last(&em_tree->map);
if (n) {
em = rb_entry(n, struct extent_map, rb_node);
ret = em->start + em->len;
}
read_unlock(&em_tree->lock);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chris mason | chris mason | 51 | 52.58% | 2 | 66.67% |
| josef bacik | josef bacik | 46 | 47.42% | 1 | 33.33% |
| Total | 97 | 100.00% | 3 | 100.00% |
static noinline int find_next_devid(struct btrfs_fs_info *fs_info,
u64 *devid_ret)
{
int ret;
struct btrfs_key key;
struct btrfs_key found_key;
struct btrfs_path *path;
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
key.objectid = BTRFS_DEV_ITEMS_OBJECTID;
key.type = BTRFS_DEV_ITEM_KEY;
key.offset = (u64)-1;
ret = btrfs_search_slot(NULL, fs_info->chunk_root, &key, path, 0, 0);
if (ret < 0)
goto error;
BUG_ON(ret == 0); /* Corruption */
ret = btrfs_previous_item(fs_info->chunk_root, path,
BTRFS_DEV_ITEMS_OBJECTID,
BTRFS_DEV_ITEM_KEY);
if (ret) {
*devid_ret = 1;
} else {
btrfs_item_key_to_cpu(path->nodes[0], &found_key,
path->slots[0]);
*devid_ret = found_key.offset + 1;
}
ret = 0;
error:
btrfs_free_path(path);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chris mason | chris mason | 145 | 81.92% | 2 | 40.00% |
| zheng yan | zheng yan | 20 | 11.30% | 1 | 20.00% |
| ilya dryomov | ilya dryomov | 11 | 6.21% | 1 | 20.00% |
| jeff mahoney | jeff mahoney | 1 | 0.56% | 1 | 20.00% |
| Total | 177 | 100.00% | 5 | 100.00% |
/*
* the device information is stored in the chunk root
* the btrfs_device struct should be fully filled in
*/
static int btrfs_add_device(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info,
struct btrfs_device *device)
{
struct btrfs_root *root = fs_info->chunk_root;
int ret;
struct btrfs_path *path;
struct btrfs_dev_item *dev_item;
struct extent_buffer *leaf;
struct btrfs_key key;
unsigned long ptr;
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
key.objectid = BTRFS_DEV_ITEMS_OBJECTID;
key.type = BTRFS_DEV_ITEM_KEY;
key.offset = device->devid;
ret = btrfs_insert_empty_item(trans, root, path, &key,
sizeof(*dev_item));
if (ret)
goto out;
leaf = path->nodes[0];
dev_item = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_dev_item);
btrfs_set_device_id(leaf, dev_item, device->devid);
btrfs_set_device_generation(leaf, dev_item, 0);
btrfs_set_device_type(leaf, dev_item, device->type);
btrfs_set_device_io_align(leaf, dev_item, device->io_align);
btrfs_set_device_io_width(leaf, dev_item, device->io_width);
btrfs_set_device_sector_size(leaf, dev_item, device->sector_size);
btrfs_set_device_total_bytes(leaf, dev_item,
btrfs_device_get_disk_total_bytes(device));
btrfs_set_device_bytes_used(leaf, dev_item,
btrfs_device_get_bytes_used(device));
btrfs_set_device_group(leaf, dev_item, 0);
btrfs_set_device_seek_speed(leaf, dev_item, 0);
btrfs_set_device_bandwidth(leaf, dev_item, 0);
btrfs_set_device_start_offset(leaf, dev_item, 0);
ptr = btrfs_device_uuid(dev_item);
write_extent_buffer(leaf, device->uuid, ptr, BTRFS_UUID_SIZE);
ptr = btrfs_device_fsid(dev_item);
write_extent_buffer(leaf, fs_info->fsid, ptr, BTRFS_UUID_SIZE);
btrfs_mark_buffer_dirty(leaf);
ret = 0;
out:
btrfs_free_path(path);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chris mason | chris mason | 271 | 83.13% | 3 | 42.86% |
| zheng yan | zheng yan | 37 | 11.35% | 1 | 14.29% |
| jeff mahoney | jeff mahoney | 11 | 3.37% | 1 | 14.29% |
| miao xie | miao xie | 6 | 1.84% | 1 | 14.29% |
| eric sandeen | eric sandeen | 1 | 0.31% | 1 | 14.29% |
| Total | 326 | 100.00% | 7 | 100.00% |
/*
* Function to update ctime/mtime for a given device path.
* Mainly used for ctime/mtime based probe like libblkid.
*/
static void update_dev_time(char *path_name)
{
struct file *filp;
filp = filp_open(path_name, O_RDWR, 0);
if (IS_ERR(filp))
return;
file_update_time(filp);
filp_close(filp, NULL);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| qu wenruo | qu wenruo | 43 | 93.48% | 1 | 50.00% |
| al viro | al viro | 3 | 6.52% | 1 | 50.00% |
| Total | 46 | 100.00% | 2 | 100.00% |
static int btrfs_rm_dev_item(struct btrfs_fs_info *fs_info,
struct btrfs_device *device)
{
struct btrfs_root *root = fs_info->chunk_root;
int ret;
struct btrfs_path *path;
struct btrfs_key key;
struct btrfs_trans_handle *trans;
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
trans = btrfs_start_transaction(root, 0);
if (IS_ERR(trans)) {
btrfs_free_path(path);
return PTR_ERR(trans);
}
key.objectid = BTRFS_DEV_ITEMS_OBJECTID;
key.type = BTRFS_DEV_ITEM_KEY;
key.offset = device->devid;
ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
if (ret < 0)
goto out;
if (ret > 0) {
ret = -ENOENT;
goto out;
}
ret = btrfs_del_item(trans, root, path);
if (ret)
goto out;
out:
btrfs_free_path(path);
btrfs_commit_transaction(trans);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chris mason | chris mason | 150 | 82.42% | 1 | 25.00% |
| tsutomu itoh | tsutomu itoh | 20 | 10.99% | 1 | 25.00% |
| jeff mahoney | jeff mahoney | 11 | 6.04% | 1 | 25.00% |
| zheng yan | zheng yan | 1 | 0.55% | 1 | 25.00% |
| Total | 182 | 100.00% | 4 | 100.00% |
/*
* Verify that @num_devices satisfies the RAID profile constraints in the whole
* filesystem. It's up to the caller to adjust that number regarding eg. device
* replace.
*/
static int btrfs_check_raid_min_devices(struct btrfs_fs_info *fs_info,
u64 num_devices)
{
u64 all_avail;
unsigned seq;
int i;
do {
seq = read_seqbegin(&fs_info->profiles_lock);
all_avail = fs_info->avail_data_alloc_bits |
fs_info->avail_system_alloc_bits |
fs_info->avail_metadata_alloc_bits;
} while (read_seqretry(&fs_info->profiles_lock, seq));
for (i = 0; i < BTRFS_NR_RAID_TYPES; i++) {
if (!(all_avail & btrfs_raid_group[i]))
continue;
if (num_devices < btrfs_raid_array[i].devs_min) {
int ret = btrfs_raid_mindev_error[i];
if (ret)
return ret;
}
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| david sterba | david sterba | 39 | 31.97% | 3 | 27.27% |
| chris mason | chris mason | 34 | 27.87% | 1 | 9.09% |
| miao xie | miao xie | 28 | 22.95% | 1 | 9.09% |
| anand jain | anand jain | 9 | 7.38% | 2 | 18.18% |
| david woodhouse | david woodhouse | 5 | 4.10% | 1 | 9.09% |
| stefan behrens | stefan behrens | 5 | 4.10% | 1 | 9.09% |
| zheng yan | zheng yan | 1 | 0.82% | 1 | 9.09% |
| liu bo | liu bo | 1 | 0.82% | 1 | 9.09% |
| Total | 122 | 100.00% | 11 | 100.00% |
struct btrfs_device *btrfs_find_next_active_device(struct btrfs_fs_devices *fs_devs,
struct btrfs_device *device)
{
struct btrfs_device *next_device;
list_for_each_entry(next_device, &fs_devs->devices, dev_list) {
if (next_device != device &&
!next_device->missing && next_device->bdev)
return next_device;
}
return NULL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| anand jain | anand jain | 45 | 84.91% | 1 | 25.00% |
| stefan behrens | stefan behrens | 5 | 9.43% | 1 | 25.00% |
| chris mason | chris mason | 2 | 3.77% | 1 | 25.00% |
| liu bo | liu bo | 1 | 1.89% | 1 | 25.00% |
| Total | 53 | 100.00% | 4 | 100.00% |
/*
* Helper function to check if the given device is part of s_bdev / latest_bdev
* and replace it with the provided or the next active device, in the context
* where this function called, there should be always be another device (or
* this_dev) which is active.
*/
void btrfs_assign_next_active_device(struct btrfs_fs_info *fs_info,
struct btrfs_device *device, struct btrfs_device *this_dev)
{
struct btrfs_device *next_device;
if (this_dev)
next_device = this_dev;
else
next_device = btrfs_find_next_active_device(fs_info->fs_devices,
device);
ASSERT(next_device);
if (fs_info->sb->s_bdev &&
(fs_info->sb->s_bdev == device->bdev))
fs_info->sb->s_bdev = next_device->bdev;
if (fs_info->fs_devices->latest_bdev == device->bdev)
fs_info->fs_devices->latest_bdev = next_device->bdev;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| anand jain | anand jain | 77 | 75.49% | 1 | 33.33% |
| david woodhouse | david woodhouse | 18 | 17.65% | 1 | 33.33% |
| chris mason | chris mason | 7 | 6.86% | 1 | 33.33% |
| Total | 102 | 100.00% | 3 | 100.00% |
int btrfs_rm_device(struct btrfs_fs_info *fs_info, char *device_path, u64 devid)
{
struct btrfs_device *device;
struct btrfs_fs_devices *cur_devices;
u64 num_devices;
int ret = 0;
bool clear_super = false;
mutex_lock(&uuid_mutex);
num_devices = fs_info->fs_devices->num_devices;
btrfs_dev_replace_lock(&fs_info->dev_replace, 0);
if (btrfs_dev_replace_is_ongoing(&fs_info->dev_replace)) {
WARN_ON(num_devices < 1);
num_devices--;
}
btrfs_dev_replace_unlock(&fs_info->dev_replace, 0);
ret = btrfs_check_raid_min_devices(fs_info, num_devices - 1);
if (ret)
goto out;
ret = btrfs_find_device_by_devspec(fs_info, devid, device_path,
&device);
if (ret)
goto out;
if (device->is_tgtdev_for_dev_replace) {
ret = BTRFS_ERROR_DEV_TGT_REPLACE;
goto out;
}
if (device->writeable && fs_info->fs_devices->rw_devices == 1) {
ret = BTRFS_ERROR_DEV_ONLY_WRITABLE;
goto out;
}
if (device->writeable) {
mutex_lock(&fs_info->chunk_mutex);
list_del_init(&device->dev_alloc_list);
device->fs_devices->rw_devices--;
mutex_unlock(&fs_info->chunk_mutex);
clear_super = true;
}
mutex_unlock(&uuid_mutex);
ret = btrfs_shrink_device(device, 0);
mutex_lock(&uuid_mutex);
if (ret)
goto error_undo;
/*
* TODO: the superblock still includes this device in its num_devices
* counter although write_all_supers() is not locked out. This
* could give a filesystem state which requires a degraded mount.
*/
ret = btrfs_rm_dev_item(fs_info, device);
if (ret)
goto error_undo;
device->in_fs_metadata = 0;
btrfs_scrub_cancel_dev(fs_info, device);
/*
* the device list mutex makes sure that we don't change
* the device list while someone else is writing out all
* the device supers. Whoever is writing all supers, should
* lock the device list mutex before getting the number of
* devices in the super block (super_copy). Conversely,
* whoever updates the number of devices in the super block
* (super_copy) should hold the device list mutex.
*/
cur_devices = device->fs_devices;
mutex_lock(&fs_info->fs_devices->device_list_mutex);
list_del_rcu(&device->dev_list);
device->fs_devices->num_devices--;
device->fs_devices->total_devices--;
if (device->missing)
device->fs_devices->missing_devices--;
btrfs_assign_next_active_device(fs_info, device, NULL);
if (device->bdev) {
device->fs_devices->open_devices--;
/* remove sysfs entry */
btrfs_sysfs_rm_device_link(fs_info->fs_devices, device);
}
num_devices = btrfs_super_num_devices(fs_info->super_copy) - 1;
btrfs_set_super_num_devices(fs_info->super_copy, num_devices);
mutex_unlock(&fs_info->fs_devices->device_list_mutex);
/*
* at this point, the device is zero sized and detached from
* the devices list. All that's left is to zero out the old
* supers and free the device.
*/
if (device->writeable)
btrfs_scratch_superblocks(device->bdev, device->name->str);
btrfs_close_bdev(device);
call_rcu(&device->rcu, free_device);
if (cur_devices->open_devices == 0) {
struct btrfs_fs_devices *fs_devices;
fs_devices = fs_info->fs_devices;
while (fs_devices) {
if (fs_devices->seed == cur_devices) {
fs_devices->seed = cur_devices->seed;
break;
}
fs_devices = fs_devices->seed;
}
cur_devices->seed = NULL;
__btrfs_close_devices(cur_devices);
free_fs_devices(cur_devices);
}
fs_info->num_tolerated_disk_barrier_failures =
btrfs_calc_num_tolerated_disk_barrier_failures(fs_info);
out:
mutex_unlock(&uuid_mutex);
return ret;
error_undo:
if (device->writeable) {
mutex_lock(&fs_info->chunk_mutex);
list_add(&device->dev_alloc_list,
&fs_info->fs_devices->alloc_list);
device->fs_devices->rw_devices++;
mutex_unlock(&fs_info->chunk_mutex);
}
goto out;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| zheng yan | zheng yan | 131 | 23.23% | 2 | 4.55% |
| chris mason | chris mason | 128 | 22.70% | 10 | 22.73% |
| anand jain | anand jain | 74 | 13.12% | 10 | 22.73% |
| david sterba | david sterba | 49 | 8.69% | 4 | 9.09% |
| jeff mahoney | jeff mahoney | 42 | 7.45% | 3 | 6.82% |
| ilya dryomov | ilya dryomov | 35 | 6.21% | 1 | 2.27% |
| stefan behrens | stefan behrens | 31 | 5.50% | 4 | 9.09% |
| xiao guangrong | xiao guangrong | 22 | 3.90% | 2 | 4.55% |
| filipe david borba manana | filipe david borba manana | 11 | 1.95% | 1 | 2.27% |
| carey underwood | carey underwood | 11 | 1.95% | 1 | 2.27% |
| miao xie | miao xie | 9 | 1.60% | 2 | 4.55% |
| josef bacik | josef bacik | 7 | 1.24% | 1 | 2.27% |
| rickard strandqvist | rickard strandqvist | 6 | 1.06% | 1 | 2.27% |
| arne jansen | arne jansen | 6 | 1.06% | 1 | 2.27% |
| eric sandeen | eric sandeen | 2 | 0.35% | 1 | 2.27% |
| Total | 564 | 100.00% | 44 | 100.00% |
void btrfs_rm_dev_replace_remove_srcdev(struct btrfs_fs_info *fs_info,
struct btrfs_device *srcdev)
{
struct btrfs_fs_devices *fs_devices;
WARN_ON(!mutex_is_locked(&fs_info->fs_devices->device_list_mutex));
/*
* in case of fs with no seed, srcdev->fs_devices will point
* to fs_devices of fs_info. However when the dev being replaced is
* a seed dev it will point to the seed's local fs_devices. In short
* srcdev will have its correct fs_devices in both the cases.
*/
fs_devices = srcdev->fs_devices;
list_del_rcu(&srcdev->dev_list);
list_del_rcu(&srcdev->dev_alloc_list);
fs_devices->num_devices--;
if (srcdev->missing)
fs_devices->missing_devices--;
if (srcdev->writeable)
fs_devices->rw_devices--;
if (srcdev->bdev)
fs_devices->open_devices--;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| stefan behrens | stefan behrens | 74 | 77.89% | 3 | 37.50% |
| anand jain | anand jain | 15 | 15.79% | 3 | 37.50% |
| miao xie | miao xie | 4 | 4.21% | 1 | 12.50% |
| qu wenruo | qu wenruo | 2 | 2.11% | 1 | 12.50% |
| Total | 95 | 100.00% | 8 | 100.00% |
void btrfs_rm_dev_replace_free_srcdev(struct btrfs_fs_info *fs_info,
struct btrfs_device *srcdev)
{
struct btrfs_fs_devices *fs_devices = srcdev->fs_devices;
if (srcdev->writeable) {
/* zero out the old super if it is writable */
btrfs_scratch_superblocks(srcdev->bdev, srcdev->name->str);
}
btrfs_close_bdev(srcdev);
call_rcu(&srcdev->rcu, free_device);
/*
* unless fs_devices is seed fs, num_devices shouldn't go
* zero
*/
BUG_ON(!fs_devices->num_devices && !fs_devices->seeding);
/* if this is no devs we rather delete the fs_devices */
if (!fs_devices->num_devices) {
struct btrfs_fs_devices *tmp_fs_devices;
tmp_fs_devices = fs_info->fs_devices;
while (tmp_fs_devices) {
if (tmp_fs_devices->seed == fs_devices) {
tmp_fs_devices->seed = fs_devices->seed;
break;
}
tmp_fs_devices = tmp_fs_devices->seed;
}
fs_devices->seed = NULL;
__btrfs_close_devices(fs_devices);
free_fs_devices(fs_devices);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| anand jain | anand jain | 89 | 62.24% | 4 | 44.44% |
| stefan behrens | stefan behrens | 23 | 16.08% | 2 | 22.22% |
| qu wenruo | qu wenruo | 23 | 16.08% | 1 | 11.11% |
| ilya dryomov | ilya dryomov | 4 | 2.80% | 1 | 11.11% |
| miao xie | miao xie | 4 | 2.80% | 1 | 11.11% |
| Total | 143 | 100.00% | 9 | 100.00% |
void btrfs_destroy_dev_replace_tgtdev(struct btrfs_fs_info *fs_info,
struct btrfs_device *tgtdev)
{
mutex_lock(&uuid_mutex);
WARN_ON(!tgtdev);
mutex_lock(&fs_info->fs_devices->device_list_mutex);
btrfs_sysfs_rm_device_link(fs_info->fs_devices, tgtdev);
if (tgtdev->bdev)
fs_info->fs_devices->open_devices--;
fs_info->fs_devices->num_devices--;
btrfs_assign_next_active_device(fs_info, tgtdev, NULL);
list_del_rcu(&tgtdev->dev_list);
mutex_unlock(&fs_info->fs_devices->device_list_mutex);
mutex_unlock(&uuid_mutex);
/*
* The update_dev_time() with in btrfs_scratch_superblocks()
* may lead to a call to btrfs_show_devname() which will try
* to hold device_list_mutex. And here this device
* is already out of device list, so we don't have to hold
* the device_list_mutex lock.
*/
btrfs_scratch_superblocks(tgtdev->bdev, tgtdev->name->str);
btrfs_close_bdev(tgtdev);
call_rcu(&tgtdev->rcu, free_device);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| stefan behrens | stefan behrens | 54 | 42.19% | 2 | 15.38% |
| anand jain | anand jain | 40 | 31.25% | 5 | 38.46% |
| miao xie | miao xie | 12 | 9.38% | 1 | 7.69% |
| xiao guangrong | xiao guangrong | 9 | 7.03% | 1 | 7.69% |
| chris mason | chris mason | 9 | 7.03% | 2 | 15.38% |
| zheng yan | zheng yan | 4 | 3.12% | 2 | 15.38% |
| Total | 128 | 100.00% | 13 | 100.00% |
static int btrfs_find_device_by_path(struct btrfs_fs_info *fs_info,
char *device_path,
struct btrfs_device **device)
{
int ret = 0;
struct btrfs_super_block *disk_super;
u64 devid;
u8 *dev_uuid;
struct block_device *bdev;
struct buffer_head *bh;
*device = NULL;
ret = btrfs_get_bdev_and_sb(device_path, FMODE_READ,
fs_info->bdev_holder, 0, &bdev, &bh);
if (ret)
return ret;
disk_super = (struct btrfs_super_block *)bh->b_data;
devid = btrfs_stack_device_id(&disk_super->dev_item);
dev_uuid = disk_super->dev_item.uuid;
*device = btrfs_find_device(fs_info, devid, dev_uuid, disk_super->fsid);
brelse(bh);
if (!*device)
ret = -ENOENT;
blkdev_put(bdev, FMODE_READ);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| stefan behrens | stefan behrens | 113 | 74.34% | 1 | 11.11% |
| zheng yan | zheng yan | 21 | 13.82% | 1 | 11.11% |
| chris mason | chris mason | 11 | 7.24% | 3 | 33.33% |
| xiao guangrong | xiao guangrong | 3 | 1.97% | 1 | 11.11% |
| jeff mahoney | jeff mahoney | 2 | 1.32% | 1 | 11.11% |
| josef bacik | josef bacik | 1 | 0.66% | 1 | 11.11% |
| eric sandeen | eric sandeen | 1 | 0.66% | 1 | 11.11% |
| Total | 152 | 100.00% | 9 | 100.00% |
int btrfs_find_device_missing_or_by_path(struct btrfs_fs_info *fs_info,
char *device_path,
struct btrfs_device **device)
{
*device = NULL;
if (strcmp(device_path, "missing") == 0) {
struct list_head *devices;
struct btrfs_device *tmp;
devices = &fs_info->fs_devices->devices;
/*
* It is safe to read the devices since the volume_mutex
* is held by the caller.
*/
list_for_each_entry(tmp, devices, dev_list) {
if (tmp->in_fs_metadata && !tmp->bdev) {
*device = tmp;
break;
}
}
if (!*device)
return BTRFS_ERROR_DEV_MISSING_NOT_FOUND;
return 0;
} else {
return btrfs_find_device_by_path(fs_info, device_path, device);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| stefan behrens | stefan behrens | 93 | 83.04% | 1 | 25.00% |
| chris mason | chris mason | 15 | 13.39% | 1 | 25.00% |
| jeff mahoney | jeff mahoney | 3 | 2.68% | 1 | 25.00% |
| anand jain | anand jain | 1 | 0.89% | 1 | 25.00% |
| Total | 112 | 100.00% | 4 | 100.00% |
/*
* Lookup a device given by device id, or the path if the id is 0.
*/
int btrfs_find_device_by_devspec(struct btrfs_fs_info *fs_info, u64 devid,
char *devpath, struct btrfs_device **device)
{
int ret;
if (devid) {
ret = 0;
*device = btrfs_find_device(fs_info, devid, NULL, NULL);
if (!*device)
ret = -ENOENT;
} else {
if (!devpath || !devpath[0])
return -EINVAL;
ret = btrfs_find_device_missing_or_by_path(fs_info, devpath,
device);
}
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| anand jain | anand jain | 82 | 88.17% | 2 | 50.00% |
| david sterba | david sterba | 8 | 8.60% | 1 | 25.00% |
| jeff mahoney | jeff mahoney | 3 | 3.23% | 1 | 25.00% |
| Total | 93 | 100.00% | 4 | 100.00% |
/*
* does all the dirty work required for changing file system's UUID.
*/
static int btrfs_prepare_sprout(struct btrfs_fs_info *fs_info)
{
struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
struct btrfs_fs_devices *old_devices;
struct btrfs_fs_devices *seed_devices;
struct btrfs_super_block *disk_super = fs_info->super_copy;
struct btrfs_device *device;
u64 super_flags;
BUG_ON(!mutex_is_locked(&uuid_mutex));
if (!fs_devices->seeding)
return -EINVAL;
seed_devices = __alloc_fs_devices();
if (IS_ERR(seed_devices))
return PTR_ERR(seed_devices);
old_devices = clone_fs_devices(fs_devices);
if (IS_ERR(old_devices)) {
kfree(seed_devices);
return PTR_ERR(old_devices);
}
list_add(&old_devices->list, &fs_uuids);
memcpy(seed_devices, fs_devices, sizeof(*seed_devices));
seed_devices->opened = 1;
INIT_LIST_HEAD(&seed_devices->devices);
INIT_LIST_HEAD(&seed_devices->alloc_list);
mutex_init(&seed_devices->device_list_mutex);
mutex_lock(&fs_info->fs_devices->device_list_mutex);
list_splice_init_rcu(&fs_devices->devices, &seed_devices->devices,
synchronize_rcu);
list_for_each_entry(device, &seed_devices->devices, dev_list)
device->fs_devices = seed_devices;
mutex_lock(&fs_info->chunk_mutex);
list_splice_init(&fs_devices->alloc_list, &seed_devices->alloc_list);
mutex_unlock(&fs_info->chunk_mutex);
fs_devices->seeding = 0;
fs_devices->num_devices = 0;
fs_devices->open_devices = 0;
fs_devices->missing_devices = 0;
fs_devices->rotating = 0;
fs_devices->seed = seed_devices;
generate_random_uuid(fs_devices->fsid);
memcpy(fs_info->fsid, fs_devices->fsid, BTRFS_FSID_SIZE);
memcpy(disk_super->fsid, fs_devices->fsid, BTRFS_FSID_SIZE);
mutex_unlock(&fs_info->fs_devices->device_list_mutex);
super_flags = btrfs_super_flags(disk_super) &
~BTRFS_SUPER_FLAG_SEEDING;
btrfs_set_super_flags(disk_super, super_flags);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| stefan behrens | stefan behrens | 275 | 82.34% | 1 | 12.50% |
| miao xie | miao xie | 29 | 8.68% | 2 | 25.00% |
| filipe david borba manana | filipe david borba manana | 10 | 2.99% | 1 | 12.50% |
| david sterba | david sterba | 8 | 2.40% | 1 | 12.50% |
| ilya dryomov | ilya dryomov | 8 | 2.40% | 1 | 12.50% |
| jeff mahoney | jeff mahoney | 4 | 1.20% | 2 | 25.00% |
| Total | 334 | 100.00% | 8 | 100.00% |
/*
* Store the expected generation for seed devices in device items.
*/
static int btrfs_finish_sprout(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info)
{
struct btrfs_root *root = fs_info->chunk_root;
struct btrfs_path *path;
struct extent_buffer *leaf;
struct btrfs_dev_item *dev_item;
struct btrfs_device *device;
struct btrfs_key key;
u8 fs_uuid[BTRFS_UUID_SIZE];
u8 dev_uuid[BTRFS_UUID_SIZE];
u64 devid;
int ret;
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
key.objectid = BTRFS_DEV_ITEMS_OBJECTID;
key.offset = 0;
key.type = BTRFS_DEV_ITEM_KEY;
while (1) {
ret = btrfs_search_slot(trans, root, &key, path, 0, 1);
if (ret < 0)
goto error;
leaf = path->nodes[0];
next_slot:
if (path->slots[0] >= btrfs_header_nritems(leaf)) {
ret = btrfs_next_leaf(root, path);
if (ret > 0)
break;
if (ret < 0)
goto error;
leaf = path->nodes[0];
btrfs_item_key_to_cpu(leaf, &key, path->slots[0]);
btrfs_release_path(path);
continue;
}
btrfs_item_key_to_cpu(leaf, &key, path->slots[0]);
if (key.objectid != BTRFS_DEV_ITEMS_OBJECTID ||
key.type != BTRFS_DEV_ITEM_KEY)
break;
dev_item = btrfs_item_ptr(leaf, path->slots[0],
struct btrfs_dev_item);
devid = btrfs_device_id(leaf, dev_item);
read_extent_buffer(leaf, dev_uuid, btrfs_device_uuid(dev_item),
BTRFS_UUID_SIZE);
read_extent_buffer(leaf, fs_uuid, btrfs_device_fsid(dev_item),
BTRFS_UUID_SIZE);
device = btrfs_find_device(fs_info, devid, dev_uuid, fs_uuid);
BUG_ON(!device); /* Logic error */
if (device->fs_devices->seeding) {
btrfs_set_device_generation(leaf, dev_item,
device->generation);
btrfs_mark_buffer_dirty(leaf);
}
path->slots[0]++;
goto next_slot;
}
ret = 0;
error:
btrfs_free_path(path);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| stefan behrens | stefan behrens | 358 | 97.02% | 1 | 50.00% |
| jeff mahoney | jeff mahoney | 11 | 2.98% | 1 | 50.00% |
| Total | 369 | 100.00% | 2 | 100.00% |
int btrfs_init_new_device(struct btrfs_fs_info *fs_info, char *device_path)
{
struct btrfs_root *root = fs_info->dev_root;
struct request_queue *q;
struct btrfs_trans_handle *trans;
struct btrfs_device *device;
struct block_device *bdev;
struct list_head *devices;
struct super_block *sb = fs_info->sb;
struct rcu_string *name;
u64 tmp;
int seeding_dev = 0;
int ret = 0;
if ((sb->s_flags & MS_RDONLY) && !fs_info->fs_devices->seeding)
return -EROFS;
bdev = blkdev_get_by_path(device_path, FMODE_WRITE | FMODE_EXCL,
fs_info->bdev_holder);
if (IS_ERR(bdev))
return PTR_ERR(bdev);
if (fs_info->fs_devices->seeding) {
seeding_dev = 1;
down_write(&sb->s_umount);
mutex_lock(&uuid_mutex);
}
filemap_write_and_wait(bdev->bd_inode->i_mapping);
devices = &fs_info->fs_devices->devices;
mutex_lock(&fs_info->fs_devices->device_list_mutex);
list_for_each_entry(device, devices, dev_list) {
if (device->bdev == bdev) {
ret = -EEXIST;
mutex_unlock(
&fs_info->fs_devices->device_list_mutex);
goto error;
}
}
mutex_unlock(&fs_info->fs_devices->device_list_mutex);
device = btrfs_alloc_device(fs_info, NULL, NULL);
if (IS_ERR(device)) {
/* we can safely leave the fs_devices entry around */
ret = PTR_ERR(device);
goto error;
}
name = rcu_string_strdup(device_path, GFP_KERNEL);
if (!name) {
kfree(device);
ret = -ENOMEM;
goto error;
}
rcu_assign_pointer(device->name, name);
trans = btrfs_start_transaction(root, 0);
if (IS_ERR(trans)) {
rcu_string_free(device->name);
kfree(device);
ret = PTR_ERR(trans);
goto error;
}
q = bdev_get_queue(bdev);
if (blk_queue_discard(q))
device->can_discard = 1;
device->writeable = 1;
device->generation = trans->transid;
device->io_width = fs_info->sectorsize;
device->io_align = fs_info->sectorsize;
device->sector_size = fs_info->sectorsize;
device->total_bytes = i_size_read(bdev->bd_inode);
device->disk_total_bytes = device->total_bytes;
device->commit_total_bytes = device->total_bytes;
device->fs_info = fs_info;
device->bdev = bdev;
device->in_fs_metadata = 1;
device->is_tgtdev_for_dev_replace = 0;
device->mode = FMODE_EXCL;
device->dev_stats_valid = 1;
set_blocksize(device->bdev, 4096);
if (seeding_dev) {
sb->s_flags &= ~MS_RDONLY;
ret = btrfs_prepare_sprout(fs_info);
BUG_ON(ret); /* -ENOMEM */
}
device->fs_devices = fs_info->fs_devices;
mutex_lock(&fs_info->fs_devices->device_list_mutex);
mutex_lock(&fs_info->chunk_mutex);
list_add_rcu(&device->dev_list, &fs_info->fs_devices->devices);
list_add(&device->dev_alloc_list,
&fs_info->fs_devices->alloc_list);
fs_info->fs_devices->num_devices++;
fs_info->fs_devices->open_devices++;
fs_info->fs_devices->rw_devices++;
fs_info->fs_devices->total_devices++;
fs_info->fs_devices->total_rw_bytes += device->total_bytes;
spin_lock(&fs_info->free_chunk_lock);
fs_info->free_chunk_space += device->total_bytes;
spin_unlock(&fs_info->free_chunk_lock);
if (!blk_queue_nonrot(bdev_get_queue(bdev)))
fs_info->fs_devices->rotating = 1;
tmp = btrfs_super_total_bytes(fs_info->super_copy);
btrfs_set_super_total_bytes(fs_info->super_copy,
tmp + device->total_bytes);
tmp = btrfs_super_num_devices(fs_info->super_copy);
btrfs_set_super_num_devices(fs_info->super_copy, tmp + 1);
/* add sysfs device entry */
btrfs_sysfs_add_device_link(fs_info->fs_devices, device);
/*
* we've got more storage, clear any full flags on the space
* infos
*/
btrfs_clear_space_info_full(fs_info);
mutex_unlock(&fs_info->chunk_mutex);
mutex_unlock(&fs_info->fs_devices->device_list_mutex);
if (seeding_dev) {
mutex_lock(&fs_info->chunk_mutex);
ret = init_first_rw_device(trans, fs_info, device);
mutex_unlock(&fs_info->chunk_mutex);
if (ret) {
btrfs_abort_transaction(trans, ret);
goto error_trans;
}
}
ret = btrfs_add_device(trans, fs_info, device);
if (ret) {
btrfs_abort_transaction(trans, ret);
goto error_trans;
}
if (seeding_dev) {
char fsid_buf[BTRFS_UUID_UNPARSED_SIZE];
ret = btrfs_finish_sprout(trans, fs_info);
if (ret) {
btrfs_abort_transaction(trans, ret);
goto error_trans;
}
/* Sprouting would change fsid of the mounted root,
* so rename the fsid on the sysfs
*/
snprintf(fsid_buf, BTRFS_UUID_UNPARSED_SIZE, "%pU",
fs_info->fsid);
if (kobject_rename(&fs_info->fs_devices->fsid_kobj, fsid_buf))
btrfs_warn(fs_info,
"sysfs: failed to create fsid for sprout");
}
fs_info->num_tolerated_disk_barrier_failures =
btrfs_calc_num_tolerated_disk_barrier_failures(fs_info);
ret = btrfs_commit_transaction(trans);
if (seeding_dev) {
mutex_unlock(&uuid_mutex);
up_write(&sb->s_umount);
if (ret) /* transaction commit */
return ret;
ret = btrfs_relocate_sys_chunks(fs_info);
if (ret < 0)
btrfs_handle_fs_error(fs_info, ret,
"Failed to relocate sys chunks after device initialization. This can be fixed using the \"btrfs balance\" command.");
trans = btrfs_attach_transaction(root);
if (IS_ERR(trans)) {
if (PTR_ERR(trans) == -ENOENT)
return 0;
return PTR_ERR(trans);
}
ret = btrfs_commit_transaction(trans);
}
/* Update ctime/mtime for libblkid */
update_dev_time(device_path);
return ret;
error_trans:
btrfs_end_transaction(trans);
rcu_string_free(device->name);
btrfs_sysfs_rm_device_link(fs_info->fs_devices, device);
kfree(device);
error:
blkdev_put(bdev, FMODE_EXCL);
if (seeding_dev) {
mutex_unlock(&uuid_mutex);
up_write(&sb->s_umount);
}
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| stefan behrens | stefan behrens | 625 | 60.62% | 3 | 7.32% |
| chris mason | chris mason | 113 | 10.96% | 5 | 12.20% |
| zheng yan | zheng yan | 92 | 8.92% | 1 | 2.44% |
| miao xie | miao xie | 58 | 5.63% | 2 | 4.88% |
| anand jain | anand jain | 34 | 3.30% | 11 | 26.83% |
| jeff mahoney | jeff mahoney | 25 | 2.42% | 7 | 17.07% |
| david sterba | david sterba | 21 | 2.04% | 3 | 7.32% |
| josef bacik | josef bacik | 20 | 1.94% | 4 | 9.76% |
| liu bo | liu bo | 18 | 1.75% | 1 | 2.44% |
| ilya dryomov | ilya dryomov | 13 | 1.26% | 2 | 4.88% |
| qu wenruo | qu wenruo | 6 | 0.58% | 1 | 2.44% |
| tsutomu itoh | tsutomu itoh | 6 | 0.58% | 1 | 2.44% |
| Total | 1031 | 100.00% | 41 | 100.00% |
int btrfs_init_dev_replace_tgtdev(struct btrfs_fs_info *fs_info,
char *device_path,
struct btrfs_device *srcdev,
struct btrfs_device **device_out)
{
struct request_queue *q;
struct btrfs_device *device;
struct block_device *bdev;
struct list_head *devices;
struct rcu_string *name;
u64 devid = BTRFS_DEV_REPLACE_DEVID;
int ret = 0;
*device_out = NULL;
if (fs_info->fs_devices->seeding) {
btrfs_err(fs_info, "the filesystem is a seed filesystem!");
return -EINVAL;
}
bdev = blkdev_get_by_path(device_path, FMODE_WRITE | FMODE_EXCL,
fs_info->bdev_holder);
if (IS_ERR(bdev)) {
btrfs_err(fs_info, "target device %s is invalid!", device_path);
return PTR_ERR(bdev);
}
filemap_write_and_wait(bdev->bd_inode->i_mapping);
devices = &fs_info->fs_devices->devices;
list_for_each_entry(device, devices, dev_list) {
if (device->bdev == bdev) {
btrfs_err(fs_info,
"target device is in the filesystem!");
ret = -EEXIST;
goto error;
}
}
if (i_size_read(bdev->bd_inode) <
btrfs_device_get_total_bytes(srcdev)) {
btrfs_err(fs_info,
"target device is smaller than source device!");
ret = -EINVAL;
goto error;
}
device = btrfs_alloc_device(NULL, &devid, NULL);
if (IS_ERR(device)) {
ret = PTR_ERR(device);
goto error;
}
name = rcu_string_strdup(device_path, GFP_NOFS);
if (!name) {
kfree(device);
ret = -ENOMEM;
goto error;
}
rcu_assign_pointer(device->name, name);
q = bdev_get_queue(bdev);
if (blk_queue_discard(q))
device->can_discard = 1;
mutex_lock(&fs_info->fs_devices->device_list_mutex);
device->writeable = 1;
device->generation = 0;
device->io_width = fs_info->sectorsize;
device->io_align = fs_info->sectorsize;
device->sector_size = fs_info->sectorsize;
device->total_bytes = btrfs_device_get_total_bytes(srcdev);
device->disk_total_bytes = btrfs_device_get_disk_total_bytes(srcdev);
device->bytes_used = btrfs_device_get_bytes_used(srcdev);
ASSERT(list_empty(&srcdev->resized_list));
device->commit_total_bytes = srcdev->commit_total_bytes;
device->commit_bytes_used = device->bytes_used;
device->fs_info = fs_info;
device->bdev = bdev;
device->in_fs_metadata = 1;
device->is_tgtdev_for_dev_replace = 1;
device->mode = FMODE_EXCL;
device->dev_stats_valid = 1;
set_blocksize(device->bdev, 4096);
device->fs_devices = fs_info->fs_devices;
list_add(&device->dev_list, &fs_info->fs_devices->devices);
fs_info->fs_devices->num_devices++;
fs_info->fs_devices->open_devices++;
mutex_unlock(&fs_info->fs_devices->device_list_mutex);
*device_out = device;
return ret;
error:
blkdev_put(bdev, FMODE_EXCL);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| stefan behrens | stefan behrens | 287 | 56.27% | 3 | 14.29% |
| miao xie | miao xie | 109 | 21.37% | 5 | 23.81% |
| chris mason | chris mason | 41 | 8.04% | 5 | 23.81% |
| zheng yan | zheng yan | 22 | 4.31% | 1 | 4.76% |
| jeff mahoney | jeff mahoney | 20 | 3.92% | 4 | 19.05% |
| ilya dryomov | ilya dryomov | 18 | 3.53% | 1 | 4.76% |
| david sterba | david sterba | 11 | 2.16% | 1 | 4.76% |
| josef bacik | josef bacik | 2 | 0.39% | 1 | 4.76% |
| Total | 510 | 100.00% | 21 | 100.00% |
void btrfs_init_dev_replace_tgtdev_for_resume(struct btrfs_fs_info *fs_info,
struct btrfs_device *tgtdev)
{
u32 sectorsize = fs_info->sectorsize;
WARN_ON(fs_info->fs_devices->rw_devices == 0);
tgtdev->io_width = sectorsize;
tgtdev->io_align = sectorsize;
tgtdev->sector_size = sectorsize;
tgtdev->fs_info = fs_info;
tgtdev->in_fs_metadata = 1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| stefan behrens | stefan behrens | 44 | 69.84% | 1 | 14.29% |
| jeff mahoney | jeff mahoney | 14 | 22.22% | 3 | 42.86% |
| chris mason | chris mason | 4 | 6.35% | 2 | 28.57% |
| zheng yan | zheng yan | 1 | 1.59% | 1 | 14.29% |
| Total | 63 | 100.00% | 7 | 100.00% |
static noinline int btrfs_update_device(struct btrfs_trans_handle *trans,
struct btrfs_device *device)
{
int ret;
struct btrfs_path *path;
struct btrfs_root *root = device->fs_info->chunk_root;
struct btrfs_dev_item *dev_item;
struct extent_buffer *leaf;
struct btrfs_key key;
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
key.objectid = BTRFS_DEV_ITEMS_OBJECTID;
key.type = BTRFS_DEV_ITEM_KEY;
key.offset = device->devid;
ret = btrfs_search_slot(trans, root, &key, path, 0, 1);
if (ret < 0)
goto out;
if (ret > 0) {
ret = -ENOENT;
goto out;
}
leaf = path->nodes[0];
dev_item = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_dev_item);
btrfs_set_device_id(leaf, dev_item, device->devid);
btrfs_set_device_type(leaf, dev_item, device->type);
btrfs_set_device_io_align(leaf, dev_item, device->io_align);
btrfs_set_device_io_width(leaf, dev_item, device->io_width);
btrfs_set_device_sector_size(leaf, dev_item, device->sector_size);
btrfs_set_device_total_bytes(leaf, dev_item,
btrfs_device_get_disk_total_bytes(device));
btrfs_set_device_bytes_used(leaf, dev_item,
btrfs_device_get_bytes_used(device));
btrfs_mark_buffer_dirty(leaf);
out:
btrfs_free_path(path);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| zheng yan | zheng yan | 186 | 75.30% | 2 | 25.00% |
| chris mason | chris mason | 48 | 19.43% | 3 | 37.50% |
| miao xie | miao xie | 6 | 2.43% | 1 | 12.50% |
| jeff mahoney | jeff mahoney | 6 | 2.43% | 1 | 12.50% |
| christoph hellwig | christoph hellwig | 1 | 0.40% | 1 | 12.50% |
| Total | 247 | 100.00% | 8 | 100.00% |
int btrfs_grow_device(struct btrfs_trans_handle *trans,
struct btrfs_device *device, u64 new_size)
{
struct btrfs_fs_info *fs_info = device->fs_info;
struct btrfs_super_block *super_copy = fs_info->super_copy;
struct btrfs_fs_devices *fs_devices;
u64 old_total;
u64 diff;
if (!device->writeable)
return -EACCES;
mutex_lock(&fs_info->chunk_mutex);
old_total = btrfs_super_total_bytes(super_copy);
diff = new_size - device->total_bytes;
if (new_size <= device->total_bytes ||
device->is_tgtdev_for_dev_replace) {
mutex_unlock(&fs_info->chunk_mutex);
return -EINVAL;
}
fs_devices = fs_info->fs_devices;
btrfs_set_super_total_bytes(super_copy, old_total + diff);
device->fs_devices->total_rw_bytes += diff;
btrfs_device_set_total_bytes(device, new_size);
btrfs_device_set_disk_total_bytes(device, new_size);
btrfs_clear_space_info_full(device->fs_info);
if (list_empty(&device->resized_list))
list_add_tail(&device->resized_list,
&fs_devices->resized_devices);
mutex_unlock(&fs_info->chunk_mutex);
return btrfs_update_device(trans, device);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| zheng yan | zheng yan | 68 | 35.79% | 1 | 8.33% |
| miao xie | miao xie | 60 | 31.58% | 3 | 25.00% |
| chris mason | chris mason | 38 | 20.00% | 4 | 33.33% |
| jeff mahoney | jeff mahoney | 11 | 5.79% | 2 | 16.67% |
| david sterba | david sterba | 9 | 4.74% | 1 | 8.33% |
| stefan behrens | stefan behrens | 4 | 2.11% | 1 | 8.33% |
| Total | 190 | 100.00% | 12 | 100.00% |
static int btrfs_free_chunk(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info, u64 chunk_objectid,
u64 chunk_offset)
{
struct btrfs_root *root = fs_info->chunk_root;
int ret;
struct btrfs_path *path;
struct btrfs_key key;
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
key.objectid = chunk_objectid;
key.offset = chunk_offset;
key.type = BTRFS_CHUNK_ITEM_KEY;
ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
if (ret < 0)
goto out;
else if (ret > 0) { /* Logic error or corruption */
btrfs_handle_fs_error(fs_info, -ENOENT,
"Failed lookup while freeing chunk.");
ret = -ENOENT;
goto out;
}
ret = btrfs_del_item(trans, root, path);
if (ret < 0)
btrfs_handle_fs_error(fs_info, ret,
"Failed to delete chunk item.");
out:
btrfs_free_path(path);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chris mason | chris mason | 59 | 35.33% | 2 | 28.57% |
| jeff mahoney | jeff mahoney | 59 | 35.33% | 2 | 28.57% |
| zheng yan | zheng yan | 46 | 27.54% | 1 | 14.29% |
| anand jain | anand jain | 2 | 1.20% | 1 | 14.29% |
| tsutomu itoh | tsutomu itoh | 1 | 0.60% | 1 | 14.29% |
| Total | 167 | 100.00% | 7 | 100.00% |
static int btrfs_del_sys_chunk(struct btrfs_fs_info *fs_info,
u64 chunk_objectid, u64 chunk_offset)
{
struct btrfs_super_block *super_copy = fs_info->super_copy;
struct btrfs_disk_key *disk_key;
struct btrfs_chunk *chunk;
u8 *ptr;
int ret = 0;
u32 num_stripes;
u32 array_size;
u32 len = 0;
u32 cur;
struct btrfs_key key;
mutex_lock(&fs_info->chunk_mutex);
array_size = btrfs_super_sys_array_size(super_copy);
ptr = super_copy->sys_chunk_array;
cur = 0;
while (cur < array_size) {
disk_key = (struct btrfs_disk_key *)ptr;
btrfs_disk_key_to_cpu(&key, disk_key);
len = sizeof(*disk_key);
if (key.type == BTRFS_CHUNK_ITEM_KEY) {
chunk = (struct btrfs_chunk *)(ptr + len);
num_stripes = btrfs_stack_chunk_num_stripes(chunk);
len += btrfs_chunk_item_size(num_stripes);
} else {
ret = -EIO;
break;
}
if (key.objectid == chunk_objectid &&
key.offset == chunk_offset) {
memmove(ptr, ptr + len, array_size - (cur + len));
array_size -= len;
btrfs_set_super_sys_array_size(super_copy, array_size);
} else {
ptr += len;
cur += len;
}
}
mutex_unlock(&fs_info->chunk_mutex);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| zheng yan | zheng yan | 144 | 61.80% | 1 | 12.50% |
| chris mason | chris mason | 70 | 30.04% | 2 | 25.00% |
| david sterba | david sterba | 8 | 3.43% | 1 | 12.50% |
| miao xie | miao xie | 6 | 2.58% | 1 | 12.50% |
| jeff mahoney | jeff mahoney | 4 | 1.72% | 2 | 25.00% |
| christoph hellwig | christoph hellwig | 1 | 0.43% | 1 | 12.50% |
| Total | 233 | 100.00% | 8 | 100.00% |
int btrfs_remove_chunk(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info, u64 chunk_offset)
{
struct extent_map_tree *em_tree;
struct extent_map *em;
struct map_lookup *map;
u64 dev_extent_len = 0;
u64 chunk_objectid = BTRFS_FIRST_CHUNK_TREE_OBJECTID;
int i, ret = 0;
struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
em_tree = &fs_info->mapping_tree.map_tree;
read_lock(&em_tree->lock);
em = lookup_extent_mapping(em_tree, chunk_offset, 1);
read_unlock(&em_tree->lock);
if (!em || em->start > chunk_offset ||
em->start + em->len < chunk_offset) {
/*
* This is a logic error, but we don't want to just rely on the
* user having built with ASSERT enabled, so if ASSERT doesn't
* do anything we still error out.
*/
ASSERT(0);
if (em)
free_extent_map(em);
return -EINVAL;
}
map = em->map_lookup;
mutex_lock(&fs_info->chunk_mutex);
check_system_chunk(trans, fs_info, map->type);
mutex_unlock(&fs_info->chunk_mutex);
/*
* Take the device list mutex to prevent races with the final phase of
* a device replace operation that replaces the device object associated
* with map stripes (dev-replace.c:btrfs_dev_replace_finishing()).
*/
mutex_lock(&fs_devices->device_list_mutex);
for (i = 0; i < map->num_stripes; i++) {
struct btrfs_device *device = map->stripes[i].dev;
ret = btrfs_free_dev_extent(trans, device,
map->stripes[i].physical,
&dev_extent_len);
if (ret) {
mutex_unlock(&fs_devices->device_list_mutex);
btrfs_abort_transaction(trans, ret);
goto out;
}
if (device->bytes_used > 0) {
mutex_lock(&fs_info->chunk_mutex);
btrfs_device_set_bytes_used(device,
device->bytes_used - dev_extent_len);
spin_lock(&fs_info->free_chunk_lock);
fs_info->free_chunk_space += dev_extent_len;
spin_unlock(&fs_info->free_chunk_lock);
btrfs_clear_space_info_full(fs_info);
mutex_unlock(&fs_info->chunk_mutex);
}
if (map->stripes[i].dev) {
ret = btrfs_update_device(trans, map->stripes[i].dev);
if (ret) {
mutex_unlock(&fs_devices->device_list_mutex);
btrfs_abort_transaction(trans, ret);
goto out;
}
}
}
mutex_unlock(&fs_devices->device_list_mutex);
ret = btrfs_free_chunk(trans, fs_info, chunk_objectid, chunk_offset);
if (ret) {
btrfs_abort_transaction(trans, ret);
goto out;
}
trace_btrfs_chunk_free(fs_info, map, chunk_offset, em->len);
if (map->type & BTRFS_BLOCK_GROUP_SYSTEM) {
ret = btrfs_del_sys_chunk(fs_info, chunk_objectid,
chunk_offset);
if (ret) {
btrfs_abort_transaction(trans, ret);
goto out;
}
}
ret = btrfs_remove_block_group(trans, fs_info, chunk_offset, em);
if (ret) {
btrfs_abort_transaction(trans, ret);
goto out;
}
out:
/* once for us */
free_extent_map(em);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| zheng yan | zheng yan | 161 | 32.26% | 1 | 5.26% |
| josef bacik | josef bacik | 110 | 22.04% | 2 | 10.53% |
| miao xie | miao xie | 67 | 13.43% | 1 | 5.26% |
| filipe david borba manana | filipe david borba manana | 64 | 12.83% | 3 | 15.79% |
| chris mason | chris mason | 55 | 11.02% | 2 | 10.53% |
| david sterba | david sterba | 14 | 2.81% | 1 | 5.26% |
| liu bo | liu bo | 14 | 2.81% | 2 | 10.53% |
| jeff mahoney | jeff mahoney | 10 | 2.00% | 5 | 26.32% |
| tsutomu itoh | tsutomu itoh | 3 | 0.60% | 1 | 5.26% |
| adam buchbinder | adam buchbinder | 1 | 0.20% | 1 | 5.26% |
| Total | 499 | 100.00% | 19 | 100.00% |
static int btrfs_relocate_chunk(struct btrfs_fs_info *fs_info, u64 chunk_offset)
{
struct btrfs_root *root = fs_info->chunk_root;
struct btrfs_trans_handle *trans;
int ret;
/*
* Prevent races with automatic removal of unused block groups.
* After we relocate and before we remove the chunk with offset
* chunk_offset, automatic removal of the block group can kick in,
* resulting in a failure when calling btrfs_remove_chunk() below.
*
* Make sure to acquire this mutex before doing a tree search (dev
* or chunk trees) to find chunks. Otherwise the cleaner kthread might
* call btrfs_remove_chunk() (through btrfs_delete_unused_bgs()) after
* we release the path used to search the chunk/dev tree and before
* the current task acquires this mutex and calls us.
*/
ASSERT(mutex_is_locked(&fs_info->delete_unused_bgs_mutex));
ret = btrfs_can_relocate(fs_info, chunk_offset);
if (ret)
return -ENOSPC;
/* step one, relocate all the extents inside this chunk */
btrfs_scrub_pause(fs_info);
ret = btrfs_relocate_block_group(fs_info, chunk_offset);
btrfs_scrub_continue(fs_info);
if (ret)
return ret;
trans = btrfs_start_trans_remove_block_group(root->fs_info,
chunk_offset);
if (IS_ERR(trans)) {
ret = PTR_ERR(trans);
btrfs_handle_fs_error(root->fs_info, ret, NULL);
return ret;
}
/*
* step two, delete the device extents and the
* chunk tree entries
*/
ret = btrfs_remove_chunk(trans, fs_info, chunk_offset);
btrfs_end_transaction(trans);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| josef bacik | josef bacik | 55 | 37.16% | 1 | 9.09% |
| chris mason | chris mason | 53 | 35.81% | 2 | 18.18% |
| filipe david borba manana | filipe david borba manana | 15 | 10.14% | 3 | 27.27% |
| jeff mahoney | jeff mahoney | 12 | 8.11% | 3 | 27.27% |
| zhao lei | zhao lei | 8 | 5.41% | 1 | 9.09% |
| naohiro aota | naohiro aota | 5 | 3.38% | 1 | 9.09% |
| Total | 148 | 100.00% | 11 | 100.00% |
static int btrfs_relocate_sys_chunks(struct btrfs_fs_info *fs_info)
{
struct btrfs_root *chunk_root = fs_info->chunk_root;
struct btrfs_path *path;
struct extent_buffer *leaf;
struct btrfs_chunk *chunk;
struct btrfs_key key;
struct btrfs_key found_key;
u64 chunk_type;
bool retried = false;
int failed = 0;
int ret;
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
again:
key.objectid = BTRFS_FIRST_CHUNK_TREE_OBJECTID;
key.offset = (u64)-1;
key.type = BTRFS_CHUNK_ITEM_KEY;
while (1) {
mutex_lock(&fs_info->delete_unused_bgs_mutex);
ret = btrfs_search_slot(NULL, chunk_root, &key, path, 0, 0);
if (ret < 0) {
mutex_unlock(&fs_info->delete_unused_bgs_mutex);
goto error;
}
BUG_ON(ret == 0); /* Corruption */
ret = btrfs_previous_item(chunk_root, path, key.objectid,
key.type);
if (ret)
mutex_unlock(&fs_info->delete_unused_bgs_mutex);
if (ret < 0)
goto error;
if (ret > 0)
break;
leaf = path->nodes[0];
btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]);
chunk = btrfs_item_ptr(leaf, path->slots[0],
struct btrfs_chunk);
chunk_type = btrfs_chunk_type(leaf, chunk);
btrfs_release_path(path);
if (chunk_type & BTRFS_BLOCK_GROUP_SYSTEM) {
ret = btrfs_relocate_chunk(fs_info, found_key.offset);
if (ret == -ENOSPC)
failed++;
else
BUG_ON(ret);
}
mutex_unlock(&fs_info->delete_unused_bgs_mutex);
if (found_key.offset == 0)
break;
key.offset = found_key.offset - 1;
}
ret = 0;
if (failed && !retried) {
failed = 0;
retried = true;
goto again;
} else if (WARN_ON(failed && retried)) {
ret = -ENOSPC;
}
error:
btrfs_free_path(path);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| zheng yan | zheng yan | 214 | 57.99% | 1 | 10.00% |
| josef bacik | josef bacik | 56 | 15.18% | 1 | 10.00% |
| chris mason | chris mason | 50 | 13.55% | 2 | 20.00% |
| filipe david borba manana | filipe david borba manana | 38 | 10.30% | 1 | 10.00% |
| himangi saraogi | himangi saraogi | 4 | 1.08% | 1 | 10.00% |
| jeff mahoney | jeff mahoney | 4 | 1.08% | 3 | 30.00% |
| dulshani gunawardhana | dulshani gunawardhana | 3 | 0.81% | 1 | 10.00% |
| Total | 369 | 100.00% | 10 | 100.00% |
static int insert_balance_item(struct btrfs_fs_info *fs_info,
struct btrfs_balance_control *bctl)
{
struct btrfs_root *root = fs_info->tree_root;
struct btrfs_trans_handle *trans;
struct btrfs_balance_item *item;
struct btrfs_disk_balance_args disk_bargs;
struct btrfs_path *path;
struct extent_buffer *leaf;
struct btrfs_key key;
int ret, err;
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
trans = btrfs_start_transaction(root, 0);
if (IS_ERR(trans)) {
btrfs_free_path(path);
return PTR_ERR(trans);
}
key.objectid = BTRFS_BALANCE_OBJECTID;
key.type = BTRFS_TEMPORARY_ITEM_KEY;
key.offset = 0;
ret = btrfs_insert_empty_item(trans, root, path, &key,
sizeof(*item));
if (ret)
goto out;
leaf = path->nodes[0];
item = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_balance_item);
memzero_extent_buffer(leaf, (unsigned long)item, sizeof(*item));
btrfs_cpu_balance_args_to_disk(&disk_bargs, &bctl->data);
btrfs_set_balance_data(leaf, item, &disk_bargs);
btrfs_cpu_balance_args_to_disk(&disk_bargs, &bctl->meta);
btrfs_set_balance_meta(leaf, item, &disk_bargs);
btrfs_cpu_balance_args_to_disk(&disk_bargs, &bctl->sys);
btrfs_set_balance_sys(leaf, item, &disk_bargs);
btrfs_set_balance_flags(leaf, item, bctl->flags);
btrfs_mark_buffer_dirty(leaf);
out:
btrfs_free_path(path);
err = btrfs_commit_transaction(trans);
if (err && !ret)
ret = err;
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| ilya dryomov | ilya dryomov | 199 | 67.23% | 1 | 7.14% |
| chris mason | chris mason | 42 | 14.19% | 7 | 50.00% |
| zheng yan | zheng yan | 35 | 11.82% | 1 | 7.14% |
| jeff mahoney | jeff mahoney | 11 | 3.72% | 1 | 7.14% |
| ben hutchings | ben hutchings | 5 | 1.69% | 1 | 7.14% |
| tsutomu itoh | tsutomu itoh | 2 | 0.68% | 1 | 7.14% |
| david sterba | david sterba | 2 | 0.68% | 2 | 14.29% |
| Total | 296 | 100.00% | 14 | 100.00% |
static int del_balance_item(struct btrfs_fs_info *fs_info)
{
struct btrfs_root *root = fs_info->tree_root;
struct btrfs_trans_handle *trans;
struct btrfs_path *path;
struct btrfs_key key;
int ret, err;
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
trans = btrfs_start_transaction(root, 0);
if (IS_ERR(trans)) {
btrfs_free_path(path);
return PTR_ERR(trans);
}
key.objectid = BTRFS_BALANCE_OBJECTID;
key.type = BTRFS_TEMPORARY_ITEM_KEY;
key.offset = 0;
ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
if (ret < 0)
goto out;
if (ret > 0) {
ret = -ENOENT;
goto out;
}
ret = btrfs_del_item(trans, root, path);
out:
btrfs_free_path(path);
err = btrfs_commit_transaction(trans);
if (err && !ret)
ret = err;
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| ilya dryomov | ilya dryomov | 141 | 77.05% | 1 | 14.29% |
| zheng yan | zheng yan | 14 | 7.65% | 1 | 14.29% |
| jeff mahoney | jeff mahoney | 11 | 6.01% | 1 | 14.29% |
| chris mason | chris mason | 10 | 5.46% | 2 | 28.57% |
| mark fasheh | mark fasheh | 6 | 3.28% | 1 | 14.29% |
| david sterba | david sterba | 1 | 0.55% | 1 | 14.29% |
| Total | 183 | 100.00% | 7 | 100.00% |
/*
* This is a heuristic used to reduce the number of chunks balanced on
* resume after balance was interrupted.
*/
static void update_balance_args(struct btrfs_balance_control *bctl)
{
/*
* Turn on soft mode for chunk types that were being converted.
*/
if (bctl->data.flags & BTRFS_BALANCE_ARGS_CONVERT)
bctl->data.flags |= BTRFS_BALANCE_ARGS_SOFT;
if (bctl->sys.flags & BTRFS_BALANCE_ARGS_CONVERT)
bctl->sys.flags |= BTRFS_BALANCE_ARGS_SOFT;
if (bctl->meta.flags & BTRFS_BALANCE_ARGS_CONVERT)
bctl->meta.flags |= BTRFS_BALANCE_ARGS_SOFT;
/*
* Turn on usage filter if is not already used. The idea is
* that chunks that we have already balanced should be
* reasonably full. Don't do it for chunks that are being
* converted - that will keep us from relocating unconverted
* (albeit full) chunks.
*/
if (!(bctl->data.flags & BTRFS_BALANCE_ARGS_USAGE) &&
!(bctl->data.flags & BTRFS_BALANCE_ARGS_USAGE_RANGE) &&
!(bctl->data.flags & BTRFS_BALANCE_ARGS_CONVERT)) {
bctl->data.flags |= BTRFS_BALANCE_ARGS_USAGE;
bctl->data.usage = 90;
}
if (!(bctl->sys.flags & BTRFS_BALANCE_ARGS_USAGE) &&
!(bctl->sys.flags & BTRFS_BALANCE_ARGS_USAGE_RANGE) &&
!(bctl->sys.flags & BTRFS_BALANCE_ARGS_CONVERT)) {
bctl->sys.flags |= BTRFS_BALANCE_ARGS_USAGE;
bctl->sys.usage = 90;
}
if (!(bctl->meta.flags & BTRFS_BALANCE_ARGS_USAGE) &&
!(bctl->meta.flags & BTRFS_BALANCE_ARGS_USAGE_RANGE) &&
!(bctl->meta.flags & BTRFS_BALANCE_ARGS_CONVERT)) {
bctl->meta.flags |= BTRFS_BALANCE_ARGS_USAGE;
bctl->meta.usage = 90;
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| ilya dryomov | ilya dryomov | 193 | 85.40% | 1 | 50.00% |
| david sterba | david sterba | 33 | 14.60% | 1 | 50.00% |
| Total | 226 | 100.00% | 2 | 100.00% |
/*
* Should be called with both balance and volume mutexes held to
* serialize other volume operations (add_dev/rm_dev/resize) with
* restriper. Same goes for unset_balance_control.
*/
static void set_balance_control(struct btrfs_balance_control *bctl)
{
struct btrfs_fs_info *fs_info = bctl->fs_info;
BUG_ON(fs_info->balance_ctl);
spin_lock(&fs_info->balance_lock);
fs_info->balance_ctl = bctl;
spin_unlock(&fs_info->balance_lock);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| ilya dryomov | ilya dryomov | 49 | 100.00% | 1 | 100.00% |
| Total | 49 | 100.00% | 1 | 100.00% |
static void unset_balance_control(struct btrfs_fs_info *fs_info)
{
struct btrfs_balance_control *bctl = fs_info->balance_ctl;
BUG_ON(!fs_info->balance_ctl);
spin_lock(&fs_info->balance_lock);
fs_info->balance_ctl = NULL;
spin_unlock(&fs_info->balance_lock);
kfree(bctl);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| ilya dryomov | ilya dryomov | 55 | 100.00% | 1 | 100.00% |
| Total | 55 | 100.00% | 1 | 100.00% |
/*
* Balance filters. Return 1 if chunk should be filtered out
* (should not be balanced).
*/
static int chunk_profiles_filter(u64 chunk_type,
struct btrfs_balance_args *bargs)
{
chunk_type = chunk_to_extended(chunk_type) &
BTRFS_EXTENDED_PROFILE_MASK;
if (bargs->profiles & chunk_type)
return 0;
return 1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| ilya dryomov | ilya dryomov | 37 | 100.00% | 2 | 100.00% |
| Total | 37 | 100.00% | 2 | 100.00% |
static int chunk_usage_range_filter(struct btrfs_fs_info *fs_info, u64 chunk_offset,
struct btrfs_balance_args *bargs)
{
struct btrfs_block_group_cache *cache;
u64 chunk_used;
u64 user_thresh_min;
u64 user_thresh_max;
int ret = 1;
cache = btrfs_lookup_block_group(fs_info, chunk_offset);
chunk_used = btrfs_block_group_used(&cache->item);
if (bargs->usage_min == 0)
user_thresh_min = 0;
else
user_thresh_min = div_factor_fine(cache->key.offset,
bargs->usage_min);
if (bargs->usage_max == 0)
user_thresh_max = 1;
else if (bargs->usage_max > 100)
user_thresh_max = cache->key.offset;
else
user_thresh_max = div_factor_fine(cache->key.offset,
bargs->usage_max);
if (user_thresh_min <= chunk_used && chunk_used < user_thresh_max)
ret = 0;
btrfs_put_block_group(cache);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| david sterba | david sterba | 127 | 83.55% | 1 | 33.33% |
| ilya dryomov | ilya dryomov | 24 | 15.79% | 1 | 33.33% |
| holger hoffstatte | holger hoffstatte | 1 | 0.66% | 1 | 33.33% |
| Total | 152 | 100.00% | 3 | 100.00% |
static int chunk_usage_filter(struct btrfs_fs_info *fs_info,
u64 chunk_offset, struct btrfs_balance_args *bargs)
{
struct btrfs_block_group_cache *cache;
u64 chunk_used, user_thresh;
int ret = 1;
cache = btrfs_lookup_block_group(fs_info, chunk_offset);
chunk_used = btrfs_block_group_used(&cache->item);
if (bargs->usage_min == 0)
user_thresh = 1;
else if (bargs->usage > 100)
user_thresh = cache->key.offset;
else
user_thresh = div_factor_fine(cache->key.offset,
bargs->usage);
if (chunk_used < user_thresh)
ret = 0;
btrfs_put_block_group(cache);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| ilya dryomov | ilya dryomov | 90 | 77.59% | 3 | 60.00% |
| david sterba | david sterba | 25 | 21.55% | 1 | 20.00% |
| holger hoffstatte | holger hoffstatte | 1 | 0.86% | 1 | 20.00% |
| Total | 116 | 100.00% | 5 | 100.00% |
static int chunk_devid_filter(struct extent_buffer *leaf,
struct btrfs_chunk *chunk,
struct btrfs_balance_args *bargs)
{
struct btrfs_stripe *stripe;
int num_stripes = btrfs_chunk_num_stripes(leaf, chunk);
int i;
for (i = 0; i < num_stripes; i++) {
stripe = btrfs_stripe_nr(chunk, i);
if (btrfs_stripe_devid(leaf, stripe) == bargs->devid)
return 0;
}
return 1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| ilya dryomov | ilya dryomov | 82 | 100.00% | 1 | 100.00% |
| Total | 82 | 100.00% | 1 | 100.00% |
/* [pstart, pend) */
static int chunk_drange_filter(struct extent_buffer *leaf,
struct btrfs_chunk *chunk,
u64 chunk_offset,
struct btrfs_balance_args *bargs)
{
struct btrfs_stripe *stripe;
int num_stripes = btrfs_chunk_num_stripes(leaf, chunk);
u64 stripe_offset;
u64 stripe_length;
int factor;
int i;
if (!(bargs->flags & BTRFS_BALANCE_ARGS_DEVID))
return 0;
if (btrfs_chunk_type(leaf, chunk) & (BTRFS_BLOCK_GROUP_DUP |
BTRFS_BLOCK_GROUP_RAID1 | BTRFS_BLOCK_GROUP_RAID10)) {
factor = num_stripes / 2;
} else if (btrfs_chunk_type(leaf, chunk) & BTRFS_BLOCK_GROUP_RAID5) {
factor = num_stripes - 1;
} else if (btrfs_chunk_type(leaf, chunk) & BTRFS_BLOCK_GROUP_RAID6) {
factor = num_stripes - 2;
} else {
factor = num_stripes;
}
for (i = 0; i < num_stripes; i++) {
stripe = btrfs_stripe_nr(chunk, i);
if (btrfs_stripe_devid(leaf, stripe) != bargs->devid)
continue;
stripe_offset = btrfs_stripe_offset(leaf, stripe);
stripe_length = btrfs_chunk_length(leaf, chunk);
stripe_length = div_u64(stripe_length, factor);
if (stripe_offset < bargs->pend &&
stripe_offset + stripe_length > bargs->pstart)
return 0;
}
return 1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| ilya dryomov | ilya dryomov | 179 | 79.91% | 1 | 33.33% |
| david woodhouse | david woodhouse | 42 | 18.75% | 1 | 33.33% |
| david sterba | david sterba | 3 | 1.34% | 1 | 33.33% |
| Total | 224 | 100.00% | 3 | 100.00% |
/* [vstart, vend) */
static int chunk_vrange_filter(struct extent_buffer *leaf,
struct btrfs_chunk *chunk,
u64 chunk_offset,
struct btrfs_balance_args *bargs)
{
if (chunk_offset < bargs->vend &&
chunk_offset + btrfs_chunk_length(leaf, chunk) > bargs->vstart)
/* at least part of the chunk is inside this vrange */
return 0;
return 1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| ilya dryomov | ilya dryomov | 52 | 100.00% | 1 | 100.00% |
| Total | 52 | 100.00% | 1 | 100.00% |
static int chunk_stripes_range_filter(struct extent_buffer *leaf,
struct btrfs_chunk *chunk,
struct btrfs_balance_args *bargs)
{
int num_stripes = btrfs_chunk_num_stripes(leaf, chunk);
if (bargs->stripes_min <= num_stripes
&& num_stripes <= bargs->stripes_max)
return 0;
return 1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| gabriel arthur petursson | gabriel arthur petursson | 51 | 100.00% | 1 | 100.00% |
| Total | 51 | 100.00% | 1 | 100.00% |
static int chunk_soft_convert_filter(u64 chunk_type,
struct btrfs_balance_args *bargs)
{
if (!(bargs->flags & BTRFS_BALANCE_ARGS_CONVERT))
return 0;
chunk_type = chunk_to_extended(chunk_type) &
BTRFS_EXTENDED_PROFILE_MASK;
if (bargs->target == chunk_type)
return 1;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| ilya dryomov | ilya dryomov | 51 | 100.00% | 2 | 100.00% |
| Total | 51 | 100.00% | 2 | 100.00% |
static int should_balance_chunk(struct btrfs_fs_info *fs_info,
struct extent_buffer *leaf,
struct btrfs_chunk *chunk, u64 chunk_offset)
{
struct btrfs_balance_control *bctl = fs_info->balance_ctl;
struct btrfs_balance_args *bargs = NULL;
u64 chunk_type = btrfs_chunk_type(leaf, chunk);
/* type filter */
if (!((chunk_type & BTRFS_BLOCK_GROUP_TYPE_MASK) &
(bctl->flags & BTRFS_BALANCE_TYPE_MASK))) {
return 0;
}
if (chunk_type & BTRFS_BLOCK_GROUP_DATA)
bargs = &bctl->data;
else if (chunk_type & BTRFS_BLOCK_GROUP_SYSTEM)
bargs = &bctl->sys;
else if (chunk_type & BTRFS_BLOCK_GROUP_METADATA)
bargs = &bctl->meta;
/* profiles filter */
if ((bargs->flags & BTRFS_BALANCE_ARGS_PROFILES) &&
chunk_profiles_filter(chunk_type, bargs)) {
return 0;
}
/* usage filter */
if ((bargs->flags & BTRFS_BALANCE_ARGS_USAGE) &&
chunk_usage_filter(fs_info, chunk_offset, bargs)) {
return 0;
} else if ((bargs->flags & BTRFS_BALANCE_ARGS_USAGE_RANGE) &&
chunk_usage_range_filter(fs_info, chunk_offset, bargs)) {
return 0;
}
/* devid filter */
if ((bargs->flags & BTRFS_BALANCE_ARGS_DEVID) &&
chunk_devid_filter(leaf, chunk, bargs)) {
return 0;
}
/* drange filter, makes sense only with devid filter */
if ((bargs->flags & BTRFS_BALANCE_ARGS_DRANGE) &&
chunk_drange_filter(leaf, chunk, chunk_offset, bargs)) {
return 0;
}
/* vrange filter */
if ((bargs->flags & BTRFS_BALANCE_ARGS_VRANGE) &&
chunk_vrange_filter(leaf, chunk, chunk_offset, bargs)) {
return 0;
}
/* stripes filter */
if ((bargs->flags & BTRFS_BALANCE_ARGS_STRIPES_RANGE) &&
chunk_stripes_range_filter(leaf, chunk, bargs)) {
return 0;
}
/* soft profile changing mode */
if ((bargs->flags & BTRFS_BALANCE_ARGS_SOFT) &&
chunk_soft_convert_filter(chunk_type, bargs)) {
return 0;
}
/*
* limited by count, must be the last filter
*/
if ((bargs->flags & BTRFS_BALANCE_ARGS_LIMIT)) {
if (bargs->limit == 0)
return 0;
else
bargs->limit--;
} else if ((bargs->flags & BTRFS_BALANCE_ARGS_LIMIT_RANGE)) {
/*
* Same logic as the 'limit' filter; the minimum cannot be
* determined here because we do not have the global information
* about the count of all chunks that satisfy the filters.
*/
if (bargs->limit_max == 0)
return 0;
else
bargs->limit_max--;
}
return 1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| ilya dryomov | ilya dryomov | 267 | 70.26% | 7 | 53.85% |
| david sterba | david sterba | 85 | 22.37% | 3 | 23.08% |
| gabriel arthur petursson | gabriel arthur petursson | 25 | 6.58% | 1 | 7.69% |
| jeff mahoney | jeff mahoney | 2 | 0.53% | 1 | 7.69% |
| nicholas d steeves | nicholas d steeves | 1 | 0.26% | 1 | 7.69% |
| Total | 380 | 100.00% | 13 | 100.00% |
static int __btrfs_balance(struct btrfs_fs_info *fs_info)
{
struct btrfs_balance_control *bctl = fs_info->balance_ctl;
struct btrfs_root *chunk_root = fs_info->chunk_root;
struct btrfs_root *dev_root = fs_info->dev_root;
struct list_head *devices;
struct btrfs_device *device;
u64 old_size;
u64 size_to_free;
u64 chunk_type;
struct btrfs_chunk *chunk;
struct btrfs_path *path = NULL;
struct btrfs_key key;
struct btrfs_key found_key;
struct btrfs_trans_handle *trans;
struct extent_buffer *leaf;
int slot;
int ret;
int enospc_errors = 0;
bool counting = true;
/* The single value limit and min/max limits use the same bytes in the */
u64 limit_data = bctl->data.limit;
u64 limit_meta = bctl->meta.limit;
u64 limit_sys = bctl->sys.limit;
u32 count_data = 0;
u32 count_meta = 0;
u32 count_sys = 0;
int chunk_reserved = 0;
u64 bytes_used = 0;
/* step one make some room on all the devices */
devices = &fs_info->fs_devices->devices;
list_for_each_entry(device, devices, dev_list) {
old_size = btrfs_device_get_total_bytes(device);
size_to_free = div_factor(old_size, 1);
size_to_free = min_t(u64, size_to_free, SZ_1M);
if (!device->writeable ||
btrfs_device_get_total_bytes(device) -
btrfs_device_get_bytes_used(device) > size_to_free ||
device->is_tgtdev_for_dev_replace)
continue;
ret = btrfs_shrink_device(device, old_size - size_to_free);
if (ret == -ENOSPC)
break;
if (ret) {
/* btrfs_shrink_device never returns ret > 0 */
WARN_ON(ret > 0);
goto error;
}
trans = btrfs_start_transaction(dev_root, 0);
if (IS_ERR(trans)) {
ret = PTR_ERR(trans);
btrfs_info_in_rcu(fs_info,
"resize: unable to start transaction after shrinking device %s (error %d), old size %llu, new size %llu",
rcu_str_deref(device->name), ret,
old_size, old_size - size_to_free);
goto error;
}
ret = btrfs_grow_device(trans, device, old_size);
if (ret) {
btrfs_end_transaction(trans);
/* btrfs_grow_device never returns ret > 0 */
WARN_ON(ret > 0);
btrfs_info_in_rcu(fs_info,
"resize: unable to grow device after shrinking device %s (error %d), old size %llu, new size %llu",
rcu_str_deref(device->name), ret,
old_size, old_size - size_to_free);
goto error;
}
btrfs_end_transaction(trans);
}
/* step two, relocate all the chunks */
path = btrfs_alloc_path();
if (!path) {
ret = -ENOMEM;
goto error;
}
/* zero out stat counters */
spin_lock(&fs_info->balance_lock);
memset(&bctl->stat, 0, sizeof(bctl->stat));
spin_unlock(&fs_info->balance_lock);
again:
if (!counting) {
/*
* The single value limit and min/max limits use the same bytes
* in the
*/
bctl->data.limit = limit_data;
bctl->meta.limit = limit_meta;
bctl->sys.limit = limit_sys;
}
key.objectid = BTRFS_FIRST_CHUNK_TREE_OBJECTID;
key.offset = (u64)-1;
key.type = BTRFS_CHUNK_ITEM_KEY;
while (1) {
if ((!counting && atomic_read(&fs_info->balance_pause_req)) ||
atomic_read(&fs_info->balance_cancel_req)) {
ret = -ECANCELED;
goto error;
}
mutex_lock(&fs_info->delete_unused_bgs_mutex);
ret = btrfs_search_slot(NULL, chunk_root, &key, path, 0, 0);
if (ret < 0) {
mutex_unlock(&fs_info->delete_unused_bgs_mutex);
goto error;
}
/*
* this shouldn't happen, it means the last relocate
* failed
*/
if (ret == 0)
BUG(); /* FIXME break ? */
ret = btrfs_previous_item(chunk_root, path, 0,
BTRFS_CHUNK_ITEM_KEY);
if (ret) {
mutex_unlock(&fs_info->delete_unused_bgs_mutex);
ret = 0;
break;
}
leaf = path->nodes[0];
slot = path->slots[0];
btrfs_item_key_to_cpu(leaf, &found_key, slot);
if (found_key.objectid != key.objectid) {
mutex_unlock(&fs_info->delete_unused_bgs_mutex);
break;
}
chunk = btrfs_item_ptr(leaf, slot, struct btrfs_chunk);
chunk_type = btrfs_chunk_type(leaf, chunk);
if (!counting) {
spin_lock(&fs_info->balance_lock);
bctl->stat.considered++;
spin_unlock(&fs_info->balance_lock);
}
ret = should_balance_chunk(fs_info, leaf, chunk,
found_key.offset);
btrfs_release_path(path);
if (!ret) {
mutex_unlock(&fs_info->delete_unused_bgs_mutex);
goto loop;
}
if (counting) {
mutex_unlock(&fs_info->delete_unused_bgs_mutex);
spin_lock(&fs_info->balance_lock);
bctl->stat.expected++;
spin_unlock(&fs_info->balance_lock);
if (chunk_type & BTRFS_BLOCK_GROUP_DATA)
count_data++;
else if (chunk_type & BTRFS_BLOCK_GROUP_SYSTEM)
count_sys++;
else if (chunk_type & BTRFS_BLOCK_GROUP_METADATA)
count_meta++;
goto loop;
}
/*
* Apply limit_min filter, no need to check if the LIMITS
* filter is used, limit_min is 0 by default
*/
if (((chunk_type & BTRFS_BLOCK_GROUP_DATA) &&
count_data < bctl->data.limit_min)
|| ((chunk_type & BTRFS_BLOCK_GROUP_METADATA) &&
count_meta < bctl->meta.limit_min)
|| ((chunk_type & BTRFS_BLOCK_GROUP_SYSTEM) &&
count_sys < bctl->sys.limit_min)) {
mutex_unlock(&fs_info->delete_unused_bgs_mutex);
goto loop;
}
ASSERT(fs_info->data_sinfo);
spin_lock(&fs_info->data_sinfo->lock);
bytes_used = fs_info->data_sinfo->bytes_used;
spin_unlock(&fs_info->data_sinfo->lock);
if ((chunk_type & BTRFS_BLOCK_GROUP_DATA) &&
!chunk_reserved && !bytes_used) {
trans = btrfs_start_transaction(chunk_root, 0);
if (IS_ERR(trans)) {
mutex_unlock(&fs_info->delete_unused_bgs_mutex);
ret = PTR_ERR(trans);
goto error;
}
ret = btrfs_force_chunk_alloc(trans, fs_info,
BTRFS_BLOCK_GROUP_DATA);
btrfs_end_transaction(trans);
if (ret < 0) {
mutex_unlock(&fs_info->delete_unused_bgs_mutex);
goto error;
}
chunk_reserved = 1;
}
ret = btrfs_relocate_chunk(fs_info, found_key.offset);
mutex_unlock(&fs_info->delete_unused_bgs_mutex);
if (ret && ret != -ENOSPC)
goto error;
if (ret == -ENOSPC) {
enospc_errors++;
} else {
spin_lock(&fs_info->balance_lock);
bctl->stat.completed++;
spin_unlock(&fs_info->balance_lock);
}
loop:
if (found_key.offset == 0)
break;
key.offset = found_key.offset - 1;
}
if (counting) {
btrfs_release_path(path);
counting = false;
goto again;
}
error:
btrfs_free_path(path);
if (enospc_errors) {
btrfs_info(fs_info, "%d enospc errors during balance",
enospc_errors);
if (!ret)
ret = -ENOSPC;
}
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| ilya dryomov | ilya dryomov | 341 | 29.63% | 6 | 17.14% |
| zheng yan | zheng yan | 206 | 17.90% | 2 | 5.71% |
| david sterba | david sterba | 180 | 15.64% | 2 | 5.71% |
| liu bo | liu bo | 129 | 11.21% | 2 | 5.71% |
| zhao lei | zhao lei | 87 | 7.56% | 1 | 2.86% |
| chris mason | chris mason | 69 | 5.99% | 9 | 25.71% |
| filipe david borba manana | filipe david borba manana | 67 | 5.82% | 2 | 5.71% |
| josef bacik | josef bacik | 29 | 2.52% | 2 | 5.71% |
| mark fasheh | mark fasheh | 12 | 1.04% | 1 | 2.86% |
| miao xie | miao xie | 9 | 0.78% | 1 | 2.86% |
| stefan behrens | stefan behrens | 4 | 0.35% | 1 | 2.86% |
| frank holton | frank holton | 4 | 0.35% | 1 | 2.86% |
| qinghuang feng | qinghuang feng | 4 | 0.35% | 1 | 2.86% |
| byongho lee | byongho lee | 4 | 0.35% | 1 | 2.86% |
| jeff mahoney | jeff mahoney | 3 | 0.26% | 2 | 5.71% |
| tsutomu itoh | tsutomu itoh | 3 | 0.26% | 1 | 2.86% |
| Total | 1151 | 100.00% | 35 | 100.00% |
/**
* alloc_profile_is_valid - see if a given profile is valid and reduced
* @flags: profile to validate
* @extended: if true @flags is treated as an extended profile
*/
static int alloc_profile_is_valid(u64 flags, int extended)
{
u64 mask = (extended ? BTRFS_EXTENDED_PROFILE_MASK :
BTRFS_BLOCK_GROUP_PROFILE_MASK);
flags &= ~BTRFS_BLOCK_GROUP_TYPE_MASK;
/* 1) check that all other bits are zeroed */
if (flags & ~mask)
return 0;
/* 2) see if profile is reduced */
if (flags == 0)
return !extended; /* "0" is valid for usual profiles */
/* true if exactly one bit set */
return (flags & (flags - 1)) == 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| ilya dryomov | ilya dryomov | 65 | 100.00% | 1 | 100.00% |
| Total | 65 | 100.00% | 1 | 100.00% |
static inline int balance_need_close(struct btrfs_fs_info *fs_info)
{
/* cancel requested || normal exit path */
return atomic_read(&fs_info->balance_cancel_req) ||
(atomic_read(&fs_info->balance_pause_req) == 0 &&
atomic_read(&fs_info->balance_cancel_req) == 0);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| ilya dryomov | ilya dryomov | 44 | 100.00% | 2 | 100.00% |
| Total | 44 | 100.00% | 2 | 100.00% |
static void __cancel_balance(struct btrfs_fs_info *fs_info)
{
int ret;
unset_balance_control(fs_info);
ret = del_balance_item(fs_info);
if (ret)
btrfs_handle_fs_error(fs_info, ret, NULL);
atomic_set(&fs_info->mutually_exclusive_operation_running, 0);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| ilya dryomov | ilya dryomov | 40 | 81.63% | 3 | 50.00% |
| liu bo | liu bo | 6 | 12.24% | 1 | 16.67% |
| anand jain | anand jain | 3 | 6.12% | 2 | 33.33% |
| Total | 49 | 100.00% | 6 | 100.00% |
/* Non-zero return value signifies invalidity */
static inline int validate_convert_profile(struct btrfs_balance_args *bctl_arg,
u64 allowed)
{
return ((bctl_arg->flags & BTRFS_BALANCE_ARGS_CONVERT) &&
(!alloc_profile_is_valid(bctl_arg->target, 1) ||
(bctl_arg->target & ~allowed)));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| alexandru moise | alexandru moise | 47 | 100.00% | 1 | 100.00% |
| Total | 47 | 100.00% | 1 | 100.00% |
/*
* Should be called with both balance and volume mutexes held
*/
int btrfs_balance(struct btrfs_balance_control *bctl,
struct btrfs_ioctl_balance_args *bargs)
{
struct btrfs_fs_info *fs_info = bctl->fs_info;
u64 allowed;
int mixed = 0;
int ret;
u64 num_devices;
unsigned seq;
if (btrfs_fs_closing(fs_info) ||
atomic_read(&fs_info->balance_pause_req) ||
atomic_read(&fs_info->balance_cancel_req)) {
ret = -EINVAL;
goto out;
}
allowed = btrfs_super_incompat_flags(fs_info->super_copy);
if (allowed & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS)
mixed = 1;
/*
* In case of mixed groups both data and meta should be picked,
* and identical options should be given for both of them.
*/
allowed = BTRFS_BALANCE_DATA | BTRFS_BALANCE_METADATA;
if (mixed && (bctl->flags & allowed)) {
if (!(bctl->flags & BTRFS_BALANCE_DATA) ||
!(bctl->flags & BTRFS_BALANCE_METADATA) ||
memcmp(&bctl->data, &bctl->meta, sizeof(bctl->data))) {
btrfs_err(fs_info,
"with mixed groups data and metadata balance options must be the same");
ret = -EINVAL;
goto out;
}
}
num_devices = fs_info->fs_devices->num_devices;
btrfs_dev_replace_lock(&fs_info->dev_replace, 0);
if (btrfs_dev_replace_is_ongoing(&fs_info->dev_replace)) {
BUG_ON(num_devices < 1);
num_devices--;
}
btrfs_dev_replace_unlock(&fs_info->dev_replace, 0);
allowed = BTRFS_AVAIL_ALLOC_BIT_SINGLE | BTRFS_BLOCK_GROUP_DUP;
if (num_devices > 1)
allowed |= (BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1);
if (num_devices > 2)
allowed |= BTRFS_BLOCK_GROUP_RAID5;
if (num_devices > 3)
allowed |= (BTRFS_BLOCK_GROUP_RAID10 |
BTRFS_BLOCK_GROUP_RAID6);
if (validate_convert_profile(&bctl->data, allowed)) {
btrfs_err(fs_info,
"unable to start balance with target data profile %llu",
bctl->data.target);
ret = -EINVAL;
goto out;
}
if (validate_convert_profile(&bctl->meta, allowed)) {
btrfs_err(fs_info,
"unable to start balance with target metadata profile %llu",
bctl->meta.target);
ret = -EINVAL;
goto out;
}
if (validate_convert_profile(&bctl->sys, allowed)) {
btrfs_err(fs_info,
"unable to start balance with target system profile %llu",
bctl->sys.target);
ret = -EINVAL;
goto out;
}
/* allow to reduce meta or sys integrity only if force set */
allowed = BTRFS_BLOCK_GROUP_DUP | BTRFS_BLOCK_GROUP_RAID1 |
BTRFS_BLOCK_GROUP_RAID10 |
BTRFS_BLOCK_GROUP_RAID5 |
BTRFS_BLOCK_GROUP_RAID6;
do {
seq = read_seqbegin(&fs_info->profiles_lock);
if (((bctl->sys.flags & BTRFS_BALANCE_ARGS_CONVERT) &&
(fs_info->avail_system_alloc_bits & allowed) &&
!(bctl->sys.target & allowed)) ||
((bctl->meta.flags & BTRFS_BALANCE_ARGS_CONVERT) &&
(fs_info->avail_metadata_alloc_bits & allowed) &&
!(bctl->meta.target & allowed))) {
if (bctl->flags & BTRFS_BALANCE_FORCE) {
btrfs_info(fs_info,
"force reducing metadata integrity");
} else {
btrfs_err(fs_info,
"balance will reduce metadata integrity, use force if you want this");
ret = -EINVAL;
goto out;
}
}
} while (read_seqretry(&fs_info->profiles_lock, seq));
if (btrfs_get_num_tolerated_disk_barrier_failures(bctl->meta.target) <
btrfs_get_num_tolerated_disk_barrier_failures(bctl->data.target)) {
btrfs_warn(fs_info,
"metadata profile 0x%llx has lower redundancy than data profile 0x%llx",
bctl->meta.target, bctl->data.target);
}
if (bctl->sys.flags & BTRFS_BALANCE_ARGS_CONVERT) {
fs_info->num_tolerated_disk_barrier_failures = min(
btrfs_calc_num_tolerated_disk_barrier_failures(fs_info),
btrfs_get_num_tolerated_disk_barrier_failures(
bctl->sys.target));
}
ret = insert_balance_item(fs_info, bctl);
if (ret && ret != -EEXIST)
goto out;
if (!(bctl->flags & BTRFS_BALANCE_RESUME)) {
BUG_ON(ret == -EEXIST);
set_balance_control(bctl);
} else {
BUG_ON(ret != -EEXIST);
spin_lock(&fs_info->balance_lock);
update_balance_args(bctl);
spin_unlock(&fs_info->balance_lock);
}
atomic_inc(&fs_info->balance_running);
mutex_unlock(&fs_info->balance_mutex);
ret = __btrfs_balance(fs_info);
mutex_lock(&fs_info->balance_mutex);
atomic_dec(&fs_info->balance_running);
if (bctl->sys.flags & BTRFS_BALANCE_ARGS_CONVERT) {
fs_info->num_tolerated_disk_barrier_failures =
btrfs_calc_num_tolerated_disk_barrier_failures(fs_info);
}
if (bargs) {
memset(bargs, 0, sizeof(*bargs));
update_ioctl_balance_args(fs_info, 0, bargs);
}
if ((ret && ret != -ECANCELED && ret != -ENOSPC) ||
balance_need_close(fs_info)) {
__cancel_balance(fs_info);
}
wake_up(&fs_info->balance_wait_q);
return ret;
out:
if (bctl->flags & BTRFS_BALANCE_RESUME)
__cancel_balance(fs_info);
else {
kfree(bctl);
atomic_set(&fs_info->mutually_exclusive_operation_running, 0);
}
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| ilya dryomov | ilya dryomov | 610 | 73.85% | 12 | 46.15% |
| stefan behrens | stefan behrens | 66 | 7.99% | 2 | 7.69% |
| sam tygier | sam tygier | 40 | 4.84% | 1 | 3.85% |
| miao xie | miao xie | 29 | 3.51% | 1 | 3.85% |
| frank holton | frank holton | 21 | 2.54% | 1 | 3.85% |
| andreas philipp | andreas philipp | 18 | 2.18% | 1 | 3.85% |
| zhao lei | zhao lei | 12 | 1.45% | 1 | 3.85% |
| alexandru moise | alexandru moise | 9 | 1.09% | 1 | 3.85% |
| david woodhouse | david woodhouse | 6 | 0.73% | 1 | 3.85% |
| zheng yan | zheng yan | 6 | 0.73% | 1 | 3.85% |
| liu bo | liu bo | 4 | 0.48% | 1 | 3.85% |
| jeff mahoney | jeff mahoney | 3 | 0.36% | 1 | 3.85% |
| filipe david borba manana | filipe david borba manana | 1 | 0.12% | 1 | 3.85% |
| austin s. hemmelgarn | austin s. hemmelgarn | 1 | 0.12% | 1 | 3.85% |
| Total | 826 | 100.00% | 26 | 100.00% |
static int balance_kthread(void *data)
{
struct btrfs_fs_info *fs_info = data;
int ret = 0;
mutex_lock(&fs_info->volume_mutex);
mutex_lock(&fs_info->balance_mutex);
if (fs_info->balance_ctl) {
btrfs_info(fs_info, "continuing balance");
ret = btrfs_balance(fs_info->balance_ctl, NULL);
}
mutex_unlock(&fs_info->balance_mutex);
mutex_unlock(&fs_info->volume_mutex);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| ilya dryomov | ilya dryomov | 79 | 95.18% | 3 | 75.00% |
| frank holton | frank holton | 4 | 4.82% | 1 | 25.00% |
| Total | 83 | 100.00% | 4 | 100.00% |
int btrfs_resume_balance_async(struct btrfs_fs_info *fs_info)
{
struct task_struct *tsk;
spin_lock(&fs_info->balance_lock);
if (!fs_info->balance_ctl) {
spin_unlock(&fs_info->balance_lock);
return 0;
}
spin_unlock(&fs_info->balance_lock);
if (btrfs_test_opt(fs_info, SKIP_BALANCE)) {
btrfs_info(fs_info, "force skipping balance");
return 0;
}
tsk = kthread_run(balance_kthread, fs_info, "btrfs-balance");
return PTR_ERR_OR_ZERO(tsk);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| ilya dryomov | ilya dryomov | 84 | 94.38% | 1 | 33.33% |
| frank holton | frank holton | 4 | 4.49% | 1 | 33.33% |
| sachin kamat | sachin kamat | 1 | 1.12% | 1 | 33.33% |
| Total | 89 | 100.00% | 3 | 100.00% |
int btrfs_recover_balance(struct btrfs_fs_info *fs_info)
{
struct btrfs_balance_control *bctl;
struct btrfs_balance_item *item;
struct btrfs_disk_balance_args disk_bargs;
struct btrfs_path *path;
struct extent_buffer *leaf;
struct btrfs_key key;
int ret;
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
key.objectid = BTRFS_BALANCE_OBJECTID;
key.type = BTRFS_TEMPORARY_ITEM_KEY;
key.offset = 0;
ret = btrfs_search_slot(NULL, fs_info->tree_root, &key, path, 0, 0);
if (ret < 0)
goto out;
if (ret > 0) { /* ret = -ENOENT; */
ret = 0;
goto out;
}
bctl = kzalloc(sizeof(*bctl), GFP_NOFS);
if (!bctl) {
ret = -ENOMEM;
goto out;
}
leaf = path->nodes[0];
item = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_balance_item);
bctl->fs_info = fs_info;
bctl->flags = btrfs_balance_flags(leaf, item);
bctl->flags |= BTRFS_BALANCE_RESUME;
btrfs_balance_data(leaf, item, &disk_bargs);
btrfs_disk_balance_args_to_cpu(&bctl->data, &disk_bargs);
btrfs_balance_meta(leaf, item, &disk_bargs);
btrfs_disk_balance_args_to_cpu(&bctl->meta, &disk_bargs);
btrfs_balance_sys(leaf, item, &disk_bargs);
btrfs_disk_balance_args_to_cpu(&bctl->sys, &disk_bargs);
WARN_ON(atomic_xchg(&fs_info->mutually_exclusive_operation_running, 1));
mutex_lock(&fs_info->volume_mutex);
mutex_lock(&fs_info->balance_mutex);
set_balance_control(bctl);
mutex_unlock(&fs_info->balance_mutex);
mutex_unlock(&fs_info->volume_mutex);
out:
btrfs_free_path(path);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| ilya dryomov | ilya dryomov | 311 | 97.80% | 3 | 60.00% |
| zheng yan | zheng yan | 6 | 1.89% | 1 | 20.00% |
| david sterba | david sterba | 1 | 0.31% | 1 | 20.00% |
| Total | 318 | 100.00% | 5 | 100.00% |
int btrfs_pause_balance(struct btrfs_fs_info *fs_info)
{
int ret = 0;
mutex_lock(&fs_info->balance_mutex);
if (!fs_info->balance_ctl) {
mutex_unlock(&fs_info->balance_mutex);
return -ENOTCONN;
}
if (atomic_read(&fs_info->balance_running)) {
atomic_inc(&fs_info->balance_pause_req);
mutex_unlock(&fs_info->balance_mutex);
wait_event(fs_info->balance_wait_q,
atomic_read(&fs_info->balance_running) == 0);
mutex_lock(&fs_info->balance_mutex);
/* we are good with balance_ctl ripped off from under us */
BUG_ON(atomic_read(&fs_info->balance_running));
atomic_dec(&fs_info->balance_pause_req);
} else {
ret = -ENOTCONN;
}
mutex_unlock(&fs_info->balance_mutex);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| ilya dryomov | ilya dryomov | 136 | 100.00% | 1 | 100.00% |
| Total | 136 | 100.00% | 1 | 100.00% |
int btrfs_cancel_balance(struct btrfs_fs_info *fs_info)
{
if (fs_info->sb->s_flags & MS_RDONLY)
return -EROFS;
mutex_lock(&fs_info->balance_mutex);
if (!fs_info->balance_ctl) {
mutex_unlock(&fs_info->balance_mutex);
return -ENOTCONN;
}
atomic_inc(&fs_info->balance_cancel_req);
/*
* if we are running just wait and return, balance item is
* deleted in btrfs_balance in this case
*/
if (atomic_read(&fs_info->balance_running)) {
mutex_unlock(&fs_info->balance_mutex);
wait_event(fs_info->balance_wait_q,
atomic_read(&fs_info->balance_running) == 0);
mutex_lock(&fs_info->balance_mutex);
} else {
/* __cancel_balance needs volume_mutex */
mutex_unlock(&fs_info->balance_mutex);
mutex_lock(&fs_info->volume_mutex);
mutex_lock(&fs_info->balance_mutex);
if (fs_info->balance_ctl)
__cancel_balance(fs_info);
mutex_unlock(&fs_info->volume_mutex);
}
BUG_ON(fs_info->balance_ctl || atomic_read(&fs_info->balance_running));
atomic_dec(&fs_info->balance_cancel_req);
mutex_unlock(&fs_info->balance_mutex);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| ilya dryomov | ilya dryomov | 141 | 75.00% | 2 | 33.33% |
| zheng yan | zheng yan | 42 | 22.34% | 1 | 16.67% |
| josef bacik | josef bacik | 4 | 2.13% | 2 | 33.33% |
| chris mason | chris mason | 1 | 0.53% | 1 | 16.67% |
| Total | 188 | 100.00% | 6 | 100.00% |
static int btrfs_uuid_scan_kthread(void *data)
{
struct btrfs_fs_info *fs_info = data;
struct btrfs_root *root = fs_info->tree_root;
struct btrfs_key key;
struct btrfs_key max_key;
struct btrfs_path *path = NULL;
int ret = 0;
struct extent_buffer *eb;
int slot;
struct btrfs_root_item root_item;
u32 item_size;
struct btrfs_trans_handle *trans = NULL;
path = btrfs_alloc_path();
if (!path) {
ret = -ENOMEM;
goto out;
}
key.objectid = 0;
key.type = BTRFS_ROOT_ITEM_KEY;
key.offset = 0;
max_key.objectid = (u64)-1;
max_key.type = BTRFS_ROOT_ITEM_KEY;
max_key.offset = (u64)-1;
while (1) {
ret = btrfs_search_forward(root, &key, path, 0);
if (ret) {
if (ret > 0)
ret = 0;
break;
}
if (key.type != BTRFS_ROOT_ITEM_KEY ||
(key.objectid < BTRFS_FIRST_FREE_OBJECTID &&
key.objectid != BTRFS_FS_TREE_OBJECTID) ||
key.objectid > BTRFS_LAST_FREE_OBJECTID)
goto skip;
eb = path->nodes[0];
slot = path->slots[0];
item_size = btrfs_item_size_nr(eb, slot);
if (item_size < sizeof(root_item))
goto skip;
read_extent_buffer(eb, &root_item,
btrfs_item_ptr_offset(eb, slot),
(int)sizeof(root_item));
if (btrfs_root_refs(&root_item) == 0)
goto skip;
if (!btrfs_is_empty_uuid(root_item.uuid) ||
!btrfs_is_empty_uuid(root_item.received_uuid)) {
if (trans)
goto update_tree;
btrfs_release_path(path);
/*
* 1 - subvol uuid item
* 1 - received_subvol uuid item
*/
trans = btrfs_start_transaction(fs_info->uuid_root, 2);
if (IS_ERR(trans)) {
ret = PTR_ERR(trans);
break;
}
continue;
} else {
goto skip;
}
update_tree:
if (!btrfs_is_empty_uuid(root_item.uuid)) {
ret = btrfs_uuid_tree_add(trans, fs_info,
root_item.uuid,
BTRFS_UUID_KEY_SUBVOL,
key.objectid);
if (ret < 0) {
btrfs_warn(fs_info, "uuid_tree_add failed %d",
ret);
break;
}
}
if (!btrfs_is_empty_uuid(root_item.received_uuid)) {
ret = btrfs_uuid_tree_add(trans, fs_info,
root_item.received_uuid,
BTRFS_UUID_KEY_RECEIVED_SUBVOL,
key.objectid);
if (ret < 0) {
btrfs_warn(fs_info, "uuid_tree_add failed %d",
ret);
break;
}
}
skip:
if (trans) {
ret = btrfs_end_transaction(trans);
trans = NULL;
if (ret)
break;
}
btrfs_release_path(path);
if (key.offset < (u64)-1) {
key.offset++;
} else if (key.type < BTRFS_ROOT_ITEM_KEY) {
key.offset = 0;
key.type = BTRFS_ROOT_ITEM_KEY;
} else if (key.objectid < (u64)-1) {
key.offset = 0;
key.type = BTRFS_ROOT_ITEM_KEY;
key.objectid++;
} else {
break;
}
cond_resched();
}
out:
btrfs_free_path(path);
if (trans && !IS_ERR(trans))
btrfs_end_transaction(trans);
if (ret)
btrfs_warn(fs_info, "btrfs_uuid_scan_kthread failed %d", ret);
else
set_bit(BTRFS_FS_UPDATE_UUID_TREE_GEN, &fs_info->flags);
up(&fs_info->uuid_tree_rescan_sem);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| stefan behrens | stefan behrens | 527 | 86.39% | 3 | 50.00% |
| filipe david borba manana | filipe david borba manana | 64 | 10.49% | 1 | 16.67% |
| frank holton | frank holton | 12 | 1.97% | 1 | 16.67% |
| josef bacik | josef bacik | 7 | 1.15% | 1 | 16.67% |
| Total | 610 | 100.00% | 6 | 100.00% |
/*
* Callback for btrfs_uuid_tree_iterate().
* returns:
* 0 check succeeded, the entry is not outdated.
* < 0 if an error occurred.
* > 0 if the check failed, which means the caller shall remove the entry.
*/
static int btrfs_check_uuid_tree_entry(struct btrfs_fs_info *fs_info,
u8 *uuid, u8 type, u64 subid)
{
struct btrfs_key key;
int ret = 0;
struct btrfs_root *subvol_root;
if (type != BTRFS_UUID_KEY_SUBVOL &&
type != BTRFS_UUID_KEY_RECEIVED_SUBVOL)
goto out;
key.objectid = subid;
key.type = BTRFS_ROOT_ITEM_KEY;
key.offset = (u64)-1;
subvol_root = btrfs_read_fs_root_no_name(fs_info, &key);
if (IS_ERR(subvol_root)) {
ret = PTR_ERR(subvol_root);
if (ret == -ENOENT)
ret = 1;
goto out;
}
switch (type) {
case BTRFS_UUID_KEY_SUBVOL:
if (memcmp(uuid, subvol_root->root_item.uuid, BTRFS_UUID_SIZE))
ret = 1;
break;
case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
if (memcmp(uuid, subvol_root->root_item.received_uuid,
BTRFS_UUID_SIZE))
ret = 1;
break;
}
out:
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| stefan behrens | stefan behrens | 167 | 100.00% | 1 | 100.00% |
| Total | 167 | 100.00% | 1 | 100.00% |
static int btrfs_uuid_rescan_kthread(void *data)
{
struct btrfs_fs_info *fs_info = (struct btrfs_fs_info *)data;
int ret;
/*
* 1st step is to iterate through the existing UUID tree and
* to delete all entries that contain outdated data.
* 2nd step is to add all missing entries to the UUID tree.
*/
ret = btrfs_uuid_tree_iterate(fs_info, btrfs_check_uuid_tree_entry);
if (ret < 0) {
btrfs_warn(fs_info, "iterating uuid_tree failed %d", ret);
up(&fs_info->uuid_tree_rescan_sem);
return ret;
}
return btrfs_uuid_scan_kthread(data);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| stefan behrens | stefan behrens | 54 | 78.26% | 1 | 33.33% |
| ilya dryomov | ilya dryomov | 11 | 15.94% | 1 | 33.33% |
| frank holton | frank holton | 4 | 5.80% | 1 | 33.33% |
| Total | 69 | 100.00% | 3 | 100.00% |
int btrfs_create_uuid_tree(struct btrfs_fs_info *fs_info)
{
struct btrfs_trans_handle *trans;
struct btrfs_root *tree_root = fs_info->tree_root;
struct btrfs_root *uuid_root;
struct task_struct *task;
int ret;
/*
* 1 - root node
* 1 - root item
*/
trans = btrfs_start_transaction(tree_root, 2);
if (IS_ERR(trans))
return PTR_ERR(trans);
uuid_root = btrfs_create_tree(trans, fs_info,
BTRFS_UUID_TREE_OBJECTID);
if (IS_ERR(uuid_root)) {
ret = PTR_ERR(uuid_root);
btrfs_abort_transaction(trans, ret);
btrfs_end_transaction(trans);
return ret;
}
fs_info->uuid_root = uuid_root;
ret = btrfs_commit_transaction(trans);
if (ret)
return ret;
down(&fs_info->uuid_tree_rescan_sem);
task = kthread_run(btrfs_uuid_scan_kthread, fs_info, "btrfs-uuid");
if (IS_ERR(task)) {
/* fs_info->update_uuid_tree_gen remains 0 in all error case */
btrfs_warn(fs_info, "failed to start uuid_scan task");
up(&fs_info->uuid_tree_rescan_sem);
return PTR_ERR(task);
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| stefan behrens | stefan behrens | 97 | 55.43% | 3 | 27.27% |
| ilya dryomov | ilya dryomov | 42 | 24.00% | 1 | 9.09% |
| zheng yan | zheng yan | 13 | 7.43% | 1 | 9.09% |
| josef bacik | josef bacik | 9 | 5.14% | 3 | 27.27% |
| david sterba | david sterba | 9 | 5.14% | 1 | 9.09% |
| frank holton | frank holton | 4 | 2.29% | 1 | 9.09% |
| chris mason | chris mason | 1 | 0.57% | 1 | 9.09% |
| Total | 175 | 100.00% | 11 | 100.00% |
int btrfs_check_uuid_tree(struct btrfs_fs_info *fs_info)
{
struct task_struct *task;
down(&fs_info->uuid_tree_rescan_sem);
task = kthread_run(btrfs_uuid_rescan_kthread, fs_info, "btrfs-uuid");
if (IS_ERR(task)) {
/* fs_info->update_uuid_tree_gen remains 0 in all error case */
btrfs_warn(fs_info, "failed to start uuid_rescan task");
up(&fs_info->uuid_tree_rescan_sem);
return PTR_ERR(task);
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| stefan behrens | stefan behrens | 43 | 63.24% | 1 | 25.00% |
| zheng yan | zheng yan | 13 | 19.12% | 1 | 25.00% |
| ilya dryomov | ilya dryomov | 8 | 11.76% | 1 | 25.00% |
| frank holton | frank holton | 4 | 5.88% | 1 | 25.00% |
| Total | 68 | 100.00% | 4 | 100.00% |
/*
* shrinking a device means finding all of the device extents past
* the new size, and then following the back refs to the chunks.
* The chunk relocation code actually frees the device extent
*/
int btrfs_shrink_device(struct btrfs_device *device, u64 new_size)
{
struct btrfs_fs_info *fs_info = device->fs_info;
struct btrfs_root *root = fs_info->dev_root;
struct btrfs_trans_handle *trans;
struct btrfs_dev_extent *dev_extent = NULL;
struct btrfs_path *path;
u64 length;
u64 chunk_offset;
int ret;
int slot;
int failed = 0;
bool retried = false;
bool checked_pending_chunks = false;
struct extent_buffer *l;
struct btrfs_key key;
struct btrfs_super_block *super_copy = fs_info->super_copy;
u64 old_total = btrfs_super_total_bytes(super_copy);
u64 old_size = btrfs_device_get_total_bytes(device);
u64 diff = old_size - new_size;
if (device->is_tgtdev_for_dev_replace)
return -EINVAL;
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
path->reada = READA_FORWARD;
mutex_lock(&fs_info->chunk_mutex);
btrfs_device_set_total_bytes(device, new_size);
if (device->writeable) {
device->fs_devices->total_rw_bytes -= diff;
spin_lock(&fs_info->free_chunk_lock);
fs_info->free_chunk_space -= diff;
spin_unlock(&fs_info->free_chunk_lock);
}
mutex_unlock(&fs_info->chunk_mutex);
again:
key.objectid = device->devid;
key.offset = (u64)-1;
key.type = BTRFS_DEV_EXTENT_KEY;
do {
mutex_lock(&fs_info->delete_unused_bgs_mutex);
ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
if (ret < 0) {
mutex_unlock(&fs_info->delete_unused_bgs_mutex);
goto done;
}
ret = btrfs_previous_item(root, path, 0, key.type);
if (ret)
mutex_unlock(&fs_info->delete_unused_bgs_mutex);
if (ret < 0)
goto done;
if (ret) {
ret = 0;
btrfs_release_path(path);
break;
}
l = path->nodes[0];
slot = path->slots[0];
btrfs_item_key_to_cpu(l, &key, path->slots[0]);
if (key.objectid != device->devid) {
mutex_unlock(&fs_info->delete_unused_bgs_mutex);
btrfs_release_path(path);
break;
}
dev_extent = btrfs_item_ptr(l, slot, struct btrfs_dev_extent);
length = btrfs_dev_extent_length(l, dev_extent);
if (key.offset + length <= new_size) {
mutex_unlock(&fs_info->delete_unused_bgs_mutex);
btrfs_release_path(path);
break;
}
chunk_offset = btrfs_dev_extent_chunk_offset(l, dev_extent);
btrfs_release_path(path);
ret = btrfs_relocate_chunk(fs_info, chunk_offset);
mutex_unlock(&fs_info->delete_unused_bgs_mutex);
if (ret && ret != -ENOSPC)
goto done;
if (ret == -ENOSPC)
failed++;
} while (key.offset-- > 0);
if (failed && !retried) {
failed = 0;
retried = true;
goto again;
} else if (failed && retried) {
ret = -ENOSPC;
goto done;
}
/* Shrinking succeeded, else we would be at "done". */
trans = btrfs_start_transaction(root, 0);
if (IS_ERR(trans)) {
ret = PTR_ERR(trans);
goto done;
}
mutex_lock(&fs_info->chunk_mutex);
/*
* We checked in the above loop all device extents that were already in
* the device tree. However before we have updated the device's
* total_bytes to the new size, we might have had chunk allocations that
* have not complete yet (new block groups attached to transaction
* handles), and therefore their device extents were not yet in the
* device tree and we missed them in the loop above. So if we have any
* pending chunk using a device extent that overlaps the device range
* that we can not use anymore, commit the current transaction and
* repeat the search on the device tree - this way we guarantee we will
* not have chunks using device extents that end beyond 'new_size'.
*/
if (!checked_pending_chunks) {
u64 start = new_size;
u64 len = old_size - new_size;
if (contains_pending_extent(trans->transaction, device,
&start, len)) {
mutex_unlock(&fs_info->chunk_mutex);
checked_pending_chunks = true;
failed = 0;
retried = false;
ret = btrfs_commit_transaction(trans);
if (ret)
goto done;
goto again;
}
}
btrfs_device_set_disk_total_bytes(device, new_size);
if (list_empty(&device->resized_list))
list_add_tail(&device->resized_list,
&fs_info->fs_devices->resized_devices);
WARN_ON(diff > old_total);
btrfs_set_super_total_bytes(super_copy, old_total - diff);
mutex_unlock(&fs_info->chunk_mutex);
/* Now btrfs_update_device() will change the on-disk size. */
ret = btrfs_update_device(trans, device);
btrfs_end_transaction(trans);
done:
btrfs_free_path(path);
if (ret) {
mutex_lock(&fs_info->chunk_mutex);
btrfs_device_set_total_bytes(device, old_size);
if (device->writeable)
device->fs_devices->total_rw_bytes += diff;
spin_lock(&fs_info->free_chunk_lock);
fs_info->free_chunk_space += diff;
spin_unlock(&fs_info->free_chunk_lock);
mutex_unlock(&fs_info->chunk_mutex);
}
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| zheng yan | zheng yan | 325 | 40.78% | 3 | 13.04% |
| filipe david borba manana | filipe david borba manana | 173 | 21.71% | 2 | 8.70% |
| josef bacik | josef bacik | 110 | 13.80% | 2 | 8.70% |
| chris ball | chris ball | 50 | 6.27% | 1 | 4.35% |
| miao xie | miao xie | 40 | 5.02% | 4 | 17.39% |
| david sterba | david sterba | 29 | 3.64% | 2 | 8.70% |
| jeff mahoney | jeff mahoney | 22 | 2.76% | 5 | 21.74% |
| tsutomu itoh | tsutomu itoh | 19 | 2.38% | 1 | 4.35% |
| stefan behrens | stefan behrens | 10 | 1.25% | 1 | 4.35% |
| zhao lei | zhao lei | 10 | 1.25% | 1 | 4.35% |
| ilya dryomov | ilya dryomov | 9 | 1.13% | 1 | 4.35% |
| Total | 797 | 100.00% | 23 | 100.00% |
static int btrfs_add_system_chunk(struct btrfs_fs_info *fs_info,
struct btrfs_key *key,
struct btrfs_chunk *chunk, int item_size)
{
struct btrfs_super_block *super_copy = fs_info->super_copy;
struct btrfs_disk_key disk_key;
u32 array_size;
u8 *ptr;
mutex_lock(&fs_info->chunk_mutex);
array_size = btrfs_super_sys_array_size(super_copy);
if (array_size + item_size + sizeof(disk_key)
> BTRFS_SYSTEM_CHUNK_ARRAY_SIZE) {
mutex_unlock(&fs_info->chunk_mutex);
return -EFBIG;
}
ptr = super_copy->sys_chunk_array + array_size;
btrfs_cpu_key_to_disk(&disk_key, key);
memcpy(ptr, &disk_key, sizeof(disk_key));
ptr += sizeof(disk_key);
memcpy(ptr, chunk, item_size);
item_size += sizeof(disk_key);
btrfs_set_super_sys_array_size(super_copy, array_size + item_size);
mutex_unlock(&fs_info->chunk_mutex);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| zhao lei | zhao lei | 134 | 84.81% | 1 | 12.50% |
| david sterba | david sterba | 12 | 7.59% | 1 | 12.50% |
| jeff mahoney | jeff mahoney | 5 | 3.16% | 2 | 25.00% |
| liu bo | liu bo | 2 | 1.27% | 1 | 12.50% |
| chris mason | chris mason | 2 | 1.27% | 1 | 12.50% |
| david woodhouse | david woodhouse | 2 | 1.27% | 1 | 12.50% |
| eric sandeen | eric sandeen | 1 | 0.63% | 1 | 12.50% |
| Total | 158 | 100.00% | 8 | 100.00% |
/*
* sort the devices in descending order by max_avail, total_avail
*/
static int btrfs_cmp_device_info(const void *a, const void *b)
{
const struct btrfs_device_info *di_a = a;
const struct btrfs_device_info *di_b = b;
if (di_a->max_avail > di_b->max_avail)
return -1;
if (di_a->max_avail < di_b->max_avail)
return 1;
if (di_a->total_avail > di_b->total_avail)
return -1;
if (di_a->total_avail < di_b->total_avail)
return 1;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| zhao lei | zhao lei | 85 | 95.51% | 1 | 50.00% |
| david woodhouse | david woodhouse | 4 | 4.49% | 1 | 50.00% |
| Total | 89 | 100.00% | 2 | 100.00% |
static u32 find_raid56_stripe_len(u32 data_devices, u32 dev_stripe_target)
{
/* TODO allow them to set a preferred stripe size */
return SZ_64K;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| david woodhouse | david woodhouse | 12 | 75.00% | 1 | 33.33% |
| miao xie | miao xie | 3 | 18.75% | 1 | 33.33% |
| byongho lee | byongho lee | 1 | 6.25% | 1 | 33.33% |
| Total | 16 | 100.00% | 3 | 100.00% |
static void check_raid56_incompat_flag(struct btrfs_fs_info *info, u64 type)
{
if (!(type & BTRFS_BLOCK_GROUP_RAID56_MASK))
return;
btrfs_set_fs_incompat(info, RAID56);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| david woodhouse | david woodhouse | 21 | 67.74% | 1 | 20.00% |
| miao xie | miao xie | 7 | 22.58% | 2 | 40.00% |
| zheng yan | zheng yan | 2 | 6.45% | 1 | 20.00% |
| zhao lei | zhao lei | 1 | 3.23% | 1 | 20.00% |
| Total | 31 | 100.00% | 5 | 100.00% |
#define BTRFS_MAX_DEVS(r) ((BTRFS_MAX_ITEM_SIZE(r->fs_info) \
- sizeof(struct btrfs_chunk)) \
/ sizeof(struct btrfs_stripe) + 1)
#define BTRFS_MAX_DEVS_SYS_CHUNK ((BTRFS_SYSTEM_CHUNK_ARRAY_SIZE \
- 2 * sizeof(struct btrfs_disk_key) \
- 2 * sizeof(struct btrfs_chunk)) \
/ sizeof(struct btrfs_stripe) + 1)
static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info, u64 start,
u64 type)
{
struct btrfs_fs_info *info = trans->fs_info;
struct btrfs_fs_devices *fs_devices = info->fs_devices;
struct list_head *cur;
struct map_lookup *map = NULL;
struct extent_map_tree *em_tree;
struct extent_map *em;
struct btrfs_device_info *devices_info = NULL;
u64 total_avail;
int num_stripes; /* total number of stripes to allocate */
int data_stripes; /* number of stripes that count for
block group size */
int sub_stripes; /* sub_stripes info for map */
int dev_stripes; /* stripes per dev */
int devs_max; /* max devs to use */
int devs_min; /* min devs needed */
int devs_increment; /* ndevs has to be a multiple of this */
int ncopies; /* how many copies to data has */
int ret;
u64 max_stripe_size;
u64 max_chunk_size;
u64 stripe_size;
u64 num_bytes;
u64 raid_stripe_len = BTRFS_STRIPE_LEN;
int ndevs;
int i;
int j;
int index;
BUG_ON(!alloc_profile_is_valid(type, 0));
if (list_empty(&fs_devices->alloc_list))
return -ENOSPC;
index = __get_raid_index(type);
sub_stripes = btrfs_raid_array[index].sub_stripes;
dev_stripes = btrfs_raid_array[index].dev_stripes;
devs_max = btrfs_raid_array[index].devs_max;
devs_min = btrfs_raid_array[index].devs_min;
devs_increment = btrfs_raid_array[index].devs_increment;
ncopies = btrfs_raid_array[index].ncopies;
if (type & BTRFS_BLOCK_GROUP_DATA) {
max_stripe_size = SZ_1G;
max_chunk_size = 10 * max_stripe_size;
if (!devs_max)
devs_max = BTRFS_MAX_DEVS(info->chunk_root);
} else if (type & BTRFS_BLOCK_GROUP_METADATA) {
/* for larger filesystems, use larger metadata chunks */
if (fs_devices->total_rw_bytes > 50ULL * SZ_1G)
max_stripe_size = SZ_1G;
else
max_stripe_size = SZ_256M;
max_chunk_size = max_stripe_size;
if (!devs_max)
devs_max = BTRFS_MAX_DEVS(info->chunk_root);
} else if (type & BTRFS_BLOCK_GROUP_SYSTEM) {
max_stripe_size = SZ_32M;
max_chunk_size = 2 * max_stripe_size;
if (!devs_max)
devs_max = BTRFS_MAX_DEVS_SYS_CHUNK;
} else {
btrfs_err(info, "invalid chunk type 0x%llx requested",
type);
BUG_ON(1);
}
/* we don't want a chunk larger than 10% of writeable space */
max_chunk_size = min(div_factor(fs_devices->total_rw_bytes, 1),
max_chunk_size);
devices_info = kcalloc(fs_devices->rw_devices, sizeof(*devices_info),
GFP_NOFS);
if (!devices_info)
return -ENOMEM;
cur = fs_devices->alloc_list.next;
/*
* in the first pass through the devices list, we gather information
* about the available holes on each device.
*/
ndevs = 0;
while (cur != &fs_devices->alloc_list) {
struct btrfs_device *device;
u64 max_avail;
u64 dev_offset;
device = list_entry(cur, struct btrfs_device, dev_alloc_list);
cur = cur->next;
if (!device->writeable) {
WARN(1, KERN_ERR
"BTRFS: read-only device in alloc_list\n");
continue;
}
if (!device->in_fs_metadata ||
device->is_tgtdev_for_dev_replace)
continue;
if (device->total_bytes > device->bytes_used)
total_avail = device->total_bytes - device->bytes_used;
else
total_avail = 0;
/* If there is no space on this device, skip it. */
if (total_avail == 0)
continue;
ret = find_free_dev_extent(trans, device,
max_stripe_size * dev_stripes,
&dev_offset, &max_avail);
if (ret && ret != -ENOSPC)
goto error;
if (ret == 0)
max_avail = max_stripe_size * dev_stripes;
if (max_avail < BTRFS_STRIPE_LEN * dev_stripes)
continue;
if (ndevs == fs_devices->rw_devices) {
WARN(1, "%s: found more than %llu devices\n",
__func__, fs_devices->rw_devices);
break;
}
devices_info[ndevs].dev_offset = dev_offset;
devices_info[ndevs].max_avail = max_avail;
devices_info[ndevs].total_avail = total_avail;
devices_info[ndevs].dev = device;
++ndevs;
}
/*
* now sort the devices by hole size / available space
*/
sort(devices_info, ndevs, sizeof(struct btrfs_device_info),
btrfs_cmp_device_info, NULL);
/* round down to number of usable stripes */
ndevs -= ndevs % devs_increment;
if (ndevs < devs_increment * sub_stripes || ndevs < devs_min) {
ret = -ENOSPC;
goto error;
}
if (devs_max && ndevs > devs_max)
ndevs = devs_max;
/*
* the primary goal is to maximize the number of stripes, so use as many
* devices as possible, even if the stripes are not maximum sized.
*/
stripe_size = devices_info[ndevs-1].max_avail;
num_stripes = ndevs * dev_stripes;
/*
* this will have to be fixed for RAID1 and RAID10 over
* more drives
*/
data_stripes = num_stripes / ncopies;
if (type & BTRFS_BLOCK_GROUP_RAID5) {
raid_stripe_len = find_raid56_stripe_len(ndevs - 1,
info->stripesize);
data_stripes = num_stripes - 1;
}
if (type & BTRFS_BLOCK_GROUP_RAID6) {
raid_stripe_len = find_raid56_stripe_len(ndevs - 2,
info->stripesize);
data_stripes = num_stripes - 2;
}
/*
* Use the number of data stripes to figure out how big this chunk
* is really going to be in terms of logical address space,
* and compare that answer with the max chunk size
*/
if (stripe_size * data_stripes > max_chunk_size) {
u64 mask = (1ULL << 24) - 1;
stripe_size = div_u64(max_chunk_size, data_stripes);
/* bump the answer up to a 16MB boundary */
stripe_size = (stripe_size + mask) & ~mask;
/* but don't go higher than the limits we found
* while searching for free extents
*/
if (stripe_size > devices_info[ndevs-1].max_avail)
stripe_size = devices_info[ndevs-1].max_avail;
}
stripe_size = div_u64(stripe_size, dev_stripes);
/* align to BTRFS_STRIPE_LEN */
stripe_size = div_u64(stripe_size, raid_stripe_len);
stripe_size *= raid_stripe_len;
map = kmalloc(map_lookup_size(num_stripes), GFP_NOFS);
if (!map) {
ret = -ENOMEM;
goto error;
}
map->num_stripes = num_stripes;
for (i = 0; i < ndevs; ++i) {
for (j = 0; j < dev_stripes; ++j) {
int s = i * dev_stripes + j;
map->stripes[s].dev = devices_info[i].dev;
map->stripes[s].physical = devices_info[i].dev_offset +
j * stripe_size;
}
}
map->sector_size = info->sectorsize;
map->stripe_len = raid_stripe_len;
map->io_align = raid_stripe_len;
map->io_width = raid_stripe_len;
map->type = type;
map->sub_stripes = sub_stripes;
num_bytes = stripe_size * data_stripes;
trace_btrfs_chunk_alloc(info, map, start, num_bytes);
em = alloc_extent_map();
if (!em) {
kfree(map);
ret = -ENOMEM;
goto error;
}
set_bit(EXTENT_FLAG_FS_MAPPING, &em->flags);
em->map_lookup = map;
em->start = start;
em->len = num_bytes;
em->block_start = 0;
em->block_len = em->len;
em->orig_block_len = stripe_size;
em_tree = &info->mapping_tree.map_tree;
write_lock(&em_tree->lock);
ret = add_extent_mapping(em_tree, em, 0);
if (!ret) {
list_add_tail(&em->list, &trans->transaction->pending_chunks);
atomic_inc(&em->refs);
}
write_unlock(&em_tree->lock);
if (ret) {
free_extent_map(em);
goto error;
}
ret = btrfs_make_block_group(trans, info, 0, type,
BTRFS_FIRST_CHUNK_TREE_OBJECTID,
start, num_bytes);
if (ret)
goto error_del_extent;
for (i = 0; i < map->num_stripes; i++) {
num_bytes = map->stripes[i].dev->bytes_used + stripe_size;
btrfs_device_set_bytes_used(map->stripes[i].dev, num_bytes);
}
spin_lock(&info->free_chunk_lock);
info->free_chunk_space -= (stripe_size * map->num_stripes);
spin_unlock(&info->free_chunk_lock);
free_extent_map(em);
check_raid56_incompat_flag(info, type);
kfree(devices_info);
return 0;
error_del_extent:
write_lock(&em_tree->lock);
remove_extent_mapping(em_tree, em);
write_unlock(&em_tree->lock);
/* One for our allocation */
free_extent_map(em);
/* One for the tree reference */
free_extent_map(em);
/* One for the pending_chunks list reference */
free_extent_map(em);
error:
kfree(devices_info);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| arne jansen | arne jansen | 396 | 29.60% | 1 | 2.38% |
| zheng yan | zheng yan | 236 | 17.64% | 1 | 2.38% |
| miao xie | miao xie | 224 | 16.74% | 5 | 11.90% |
| josef bacik | josef bacik | 98 | 7.32% | 5 | 11.90% |
| david woodhouse | david woodhouse | 88 | 6.58% | 1 | 2.38% |
| chris mason | chris mason | 86 | 6.43% | 5 | 11.90% |
| liu bo | liu bo | 63 | 4.71% | 3 | 7.14% |
| gui hecheng | gui hecheng | 37 | 2.77% | 1 | 2.38% |
| eric sandeen | eric sandeen | 24 | 1.79% | 1 | 2.38% |
| jeff mahoney | jeff mahoney | 22 | 1.64% | 5 | 11.90% |
| david sterba | david sterba | 15 | 1.12% | 4 | 9.52% |
| wang shilong | wang shilong | 15 | 1.12% | 1 | 2.38% |
| ilya dryomov | ilya dryomov | 9 | 0.67% | 2 | 4.76% |
| filipe david borba manana | filipe david borba manana | 6 | 0.45% | 1 | 2.38% |
| byongho lee | byongho lee | 5 | 0.37% | 1 | 2.38% |
| stefan behrens | stefan behrens | 4 | 0.30% | 1 | 2.38% |
| frank holton | frank holton | 4 | 0.30% | 1 | 2.38% |
| julia lawall | julia lawall | 3 | 0.22% | 1 | 2.38% |
| chandan rajendra | chandan rajendra | 2 | 0.15% | 1 | 2.38% |
| mark fasheh | mark fasheh | 1 | 0.07% | 1 | 2.38% |
| Total | 1338 | 100.00% | 42 | 100.00% |
int btrfs_finish_chunk_alloc(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info,
u64 chunk_offset, u64 chunk_size)
{
struct btrfs_root *extent_root = fs_info->extent_root;
struct btrfs_root *chunk_root = fs_info->chunk_root;
struct btrfs_key key;
struct btrfs_device *device;
struct btrfs_chunk *chunk;
struct btrfs_stripe *stripe;
struct extent_map_tree *em_tree;
struct extent_map *em;
struct map_lookup *map;
size_t item_size;
u64 dev_offset;
u64 stripe_size;
int i = 0;
int ret = 0;
em_tree = &fs_info->mapping_tree.map_tree;
read_lock(&em_tree->lock);
em = lookup_extent_mapping(em_tree, chunk_offset, chunk_size);
read_unlock(&em_tree->lock);
if (!em) {
btrfs_crit(fs_info, "unable to find logical %Lu len %Lu",
chunk_offset, chunk_size);
return -EINVAL;
}
if (em->start != chunk_offset || em->len != chunk_size) {
btrfs_crit(fs_info,
"found a bad mapping, wanted %Lu-%Lu, found %Lu-%Lu",
chunk_offset, chunk_size, em->start, em->len);
free_extent_map(em);
return -EINVAL;
}
map = em->map_lookup;
item_size = btrfs_chunk_item_size(map->num_stripes);
stripe_size = em->orig_block_len;
chunk = kzalloc(item_size, GFP_NOFS);
if (!chunk) {
ret = -ENOMEM;
goto out;
}
/*
* Take the device list mutex to prevent races with the final phase of
* a device replace operation that replaces the device object associated
* with the map's stripes, because the device object's id can change
* at any time during that final phase of the device replace operation
* (dev-replace.c:btrfs_dev_replace_finishing()).
*/
mutex_lock(&fs_info->fs_devices->device_list_mutex);
for (i = 0; i < map->num_stripes; i++) {
device = map->stripes[i].dev;
dev_offset = map->stripes[i].physical;
ret = btrfs_update_device(trans, device);
if (ret)
break;
ret = btrfs_alloc_dev_extent(trans, device,
chunk_root->root_key.objectid,
BTRFS_FIRST_CHUNK_TREE_OBJECTID,
chunk_offset, dev_offset,
stripe_size);
if (ret)
break;
}
if (ret) {
mutex_unlock(&fs_info->fs_devices->device_list_mutex);
goto out;
}
stripe = &chunk->stripe;
for (i = 0; i < map->num_stripes; i++) {
device = map->stripes[i].dev;
dev_offset = map->stripes[i].physical;
btrfs_set_stack_stripe_devid(stripe, device->devid);
btrfs_set_stack_stripe_offset(stripe, dev_offset);
memcpy(stripe->dev_uuid, device->uuid, BTRFS_UUID_SIZE);
stripe++;
}
mutex_unlock(&fs_info->fs_devices->device_list_mutex);
btrfs_set_stack_chunk_length(chunk, chunk_size);
btrfs_set_stack_chunk_owner(chunk, extent_root->root_key.objectid);
btrfs_set_stack_chunk_stripe_len(chunk, map->stripe_len);
btrfs_set_stack_chunk_type(chunk, map->type);
btrfs_set_stack_chunk_num_stripes(chunk, map->num_stripes);
btrfs_set_stack_chunk_io_align(chunk, map->stripe_len);
btrfs_set_stack_chunk_io_width(chunk, map->stripe_len);
btrfs_set_stack_chunk_sector_size(chunk, fs_info->sectorsize);
btrfs_set_stack_chunk_sub_stripes(chunk, map->sub_stripes);
key.objectid = BTRFS_FIRST_CHUNK_TREE_OBJECTID;
key.type = BTRFS_CHUNK_ITEM_KEY;
key.offset = chunk_offset;
ret = btrfs_insert_item(trans, chunk_root, &key, chunk, item_size);
if (ret == 0 && map->type & BTRFS_BLOCK_GROUP_SYSTEM) {
/*
* TODO: Cleanup of inserted chunk root in case of
* failure.
*/
ret = btrfs_add_system_chunk(fs_info, &key, chunk, item_size);
}
out:
kfree(chunk);
free_extent_map(em);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| zheng yan | zheng yan | 235 | 39.36% | 1 | 5.26% |
| josef bacik | josef bacik | 207 | 34.67% | 2 | 10.53% |
| chris mason | chris mason | 83 | 13.90% | 8 | 42.11% |
| filipe david borba manana | filipe david borba manana | 39 | 6.53% | 1 | 5.26% |
| jeff mahoney | jeff mahoney | 18 | 3.02% | 5 | 26.32% |
| mark fasheh | mark fasheh | 15 | 2.51% | 2 | 10.53% |
| Total | 597 | 100.00% | 19 | 100.00% |
/*
* Chunk allocation falls into two parts. The first part does works
* that make the new allocated chunk useable, but not do any operation
* that modifies the chunk tree. The second part does the works that
* require modifying the chunk tree. This division is important for the
* bootstrap process of adding storage to a seed btrfs.
*/
int btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info, u64 type)
{
u64 chunk_offset;
ASSERT(mutex_is_locked(&fs_info->chunk_mutex));
chunk_offset = find_next_chunk(fs_info);
return __btrfs_alloc_chunk(trans, fs_info, chunk_offset, type);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| zheng yan | zheng yan | 25 | 49.02% | 1 | 16.67% |
| chris mason | chris mason | 11 | 21.57% | 2 | 33.33% |
| filipe david borba manana | filipe david borba manana | 11 | 21.57% | 1 | 16.67% |
| jeff mahoney | jeff mahoney | 3 | 5.88% | 1 | 16.67% |
| josef bacik | josef bacik | 1 | 1.96% | 1 | 16.67% |
| Total | 51 | 100.00% | 6 | 100.00% |
static noinline int init_first_rw_device(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info,
struct btrfs_device *device)
{
struct btrfs_root *extent_root = fs_info->extent_root;
u64 chunk_offset;
u64 sys_chunk_offset;
u64 alloc_profile;
int ret;
chunk_offset = find_next_chunk(fs_info);
alloc_profile = btrfs_get_alloc_profile(extent_root, 0);
ret = __btrfs_alloc_chunk(trans, fs_info, chunk_offset, alloc_profile);
if (ret)
return ret;
sys_chunk_offset = find_next_chunk(fs_info);
alloc_profile = btrfs_get_alloc_profile(fs_info->chunk_root, 0);
ret = __btrfs_alloc_chunk(trans, fs_info, sys_chunk_offset,
alloc_profile);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| zheng yan | zheng yan | 46 | 40.71% | 1 | 8.33% |
| chris mason | chris mason | 35 | 30.97% | 7 | 58.33% |
| jeff mahoney | jeff mahoney | 20 | 17.70% | 2 | 16.67% |
| miao xie | miao xie | 7 | 6.19% | 1 | 8.33% |
| josef bacik | josef bacik | 5 | 4.42% | 1 | 8.33% |
| Total | 113 | 100.00% | 12 | 100.00% |
static inline int btrfs_chunk_max_errors(struct map_lookup *map)
{
int max_errors;
if (map->type & (BTRFS_BLOCK_GROUP_RAID1 |
BTRFS_BLOCK_GROUP_RAID10 |
BTRFS_BLOCK_GROUP_RAID5 |
BTRFS_BLOCK_GROUP_DUP)) {
max_errors = 1;
} else if (map->type & BTRFS_BLOCK_GROUP_RAID6) {
max_errors = 2;
} else {
max_errors = 0;
}
return max_errors;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| miao xie | miao xie | 49 | 79.03% | 1 | 16.67% |
| jeff mahoney | jeff mahoney | 6 | 9.68% | 1 | 16.67% |
| chris mason | chris mason | 4 | 6.45% | 2 | 33.33% |
| zheng yan | zheng yan | 2 | 3.23% | 1 | 16.67% |
| david sterba | david sterba | 1 | 1.61% | 1 | 16.67% |
| Total | 62 | 100.00% | 6 | 100.00% |
int btrfs_chunk_readonly(struct btrfs_fs_info *fs_info, u64 chunk_offset)
{
struct extent_map *em;
struct map_lookup *map;
struct btrfs_mapping_tree *map_tree = &fs_info->mapping_tree;
int readonly = 0;
int miss_ndevs = 0;
int i;
read_lock(&map_tree->map_tree.lock);
em = lookup_extent_mapping(&map_tree->map_tree, chunk_offset, 1);
read_unlock(&map_tree->map_tree.lock);
if (!em)
return 1;
map = em->map_lookup;
for (i = 0; i < map->num_stripes; i++) {
if (map->stripes[i].dev->missing) {
miss_ndevs++;
continue;
}
if (!map->stripes[i].dev->writeable) {
readonly = 1;
goto end;
}
}
/*
* If the number of missing devices is larger than max errors,
* we can not write the data into that chunk successfully, so
* set it readonly.
*/
if (miss_ndevs > btrfs_chunk_max_errors(map))
readonly = 1;
end:
free_extent_map(em);
return readonly;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| zheng yan | zheng yan | 99 | 55.93% | 1 | 14.29% |
| miao xie | miao xie | 43 | 24.29% | 1 | 14.29% |
| chris mason | chris mason | 32 | 18.08% | 3 | 42.86% |
| jeff mahoney | jeff mahoney | 3 | 1.69% | 2 | 28.57% |
| Total | 177 | 100.00% | 7 | 100.00% |
void btrfs_mapping_init(struct btrfs_mapping_tree *tree)
{
extent_map_tree_init(&tree->map_tree);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chris mason | chris mason | 18 | 100.00% | 1 | 100.00% |
| Total | 18 | 100.00% | 1 | 100.00% |
void btrfs_mapping_tree_free(struct btrfs_mapping_tree *tree)
{
struct extent_map *em;
while (1) {
write_lock(&tree->map_tree.lock);
em = lookup_extent_mapping(&tree->map_tree, 0, (u64)-1);
if (em)
remove_extent_mapping(&tree->map_tree, em);
write_unlock(&tree->map_tree.lock);
if (!em)
break;
/* once for us */
free_extent_map(em);
/* once for the tree */
free_extent_map(em);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chris mason | chris mason | 91 | 100.00% | 2 | 100.00% |
| Total | 91 | 100.00% | 2 | 100.00% |
int btrfs_num_copies(struct btrfs_fs_info *fs_info, u64 logical, u64 len)
{
struct btrfs_mapping_tree *map_tree = &fs_info->mapping_tree;
struct extent_map *em;
struct map_lookup *map;
struct extent_map_tree *em_tree = &map_tree->map_tree;
int ret;
read_lock(&em_tree->lock);
em = lookup_extent_mapping(em_tree, logical, len);
read_unlock(&em_tree->lock);
/*
* We could return errors for these cases, but that could get ugly and
* we'd probably do the same thing which is just not do anything else
* and exit, so return 1 so the callers don't try to use other copies.
*/
if (!em) {
btrfs_crit(fs_info, "No mapping for %Lu-%Lu", logical,
logical+len);
return 1;
}
if (em->start > logical || em->start + em->len < logical) {
btrfs_crit(fs_info, "Invalid mapping for %Lu-%Lu, got %Lu-%Lu",
logical, logical+len, em->start,
em->start + em->len);
free_extent_map(em);
return 1;
}
map = em->map_lookup;
if (map->type & (BTRFS_BLOCK_GROUP_DUP | BTRFS_BLOCK_GROUP_RAID1))
ret = map->num_stripes;
else if (map->type & BTRFS_BLOCK_GROUP_RAID10)
ret = map->sub_stripes;
else if (map->type & BTRFS_BLOCK_GROUP_RAID5)
ret = 2;
else if (map->type & BTRFS_BLOCK_GROUP_RAID6)
ret = 3;
else
ret = 1;
free_extent_map(em);
btrfs_dev_replace_lock(&fs_info->dev_replace, 0);
if (btrfs_dev_replace_is_ongoing(&fs_info->dev_replace))
ret++;
btrfs_dev_replace_unlock(&fs_info->dev_replace, 0);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chris mason | chris mason | 136 | 51.52% | 4 | 28.57% |
| josef bacik | josef bacik | 47 | 17.80% | 1 | 7.14% |
| stefan behrens | stefan behrens | 41 | 15.53% | 2 | 14.29% |
| david woodhouse | david woodhouse | 26 | 9.85% | 1 | 7.14% |
| liu bo | liu bo | 9 | 3.41% | 2 | 14.29% |
| david sterba | david sterba | 3 | 1.14% | 2 | 14.29% |
| jeff mahoney | jeff mahoney | 2 | 0.76% | 2 | 14.29% |
| Total | 264 | 100.00% | 14 | 100.00% |
unsigned long btrfs_full_stripe_len(struct btrfs_fs_info *fs_info,
struct btrfs_mapping_tree *map_tree,
u64 logical)
{
struct extent_map *em;
struct map_lookup *map;
struct extent_map_tree *em_tree = &map_tree->map_tree;
unsigned long len = fs_info->sectorsize;
read_lock(&em_tree->lock);
em = lookup_extent_mapping(em_tree, logical, len);
read_unlock(&em_tree->lock);
BUG_ON(!em);
BUG_ON(em->start > logical || em->start + em->len < logical);
map = em->map_lookup;
if (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK)
len = map->stripe_len * nr_data_stripes(map);
free_extent_map(em);
return len;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| david woodhouse | david woodhouse | 109 | 82.58% | 1 | 14.29% |
| stefan behrens | stefan behrens | 12 | 9.09% | 1 | 14.29% |
| chris mason | chris mason | 6 | 4.55% | 1 | 14.29% |
| jeff mahoney | jeff mahoney | 4 | 3.03% | 3 | 42.86% |
| zhao lei | zhao lei | 1 | 0.76% | 1 | 14.29% |
| Total | 132 | 100.00% | 7 | 100.00% |
int btrfs_is_parity_mirror(struct btrfs_mapping_tree *map_tree,
u64 logical, u64 len, int mirror_num)
{
struct extent_map *em;
struct map_lookup *map;
struct extent_map_tree *em_tree = &map_tree->map_tree;
int ret = 0;
read_lock(&em_tree->lock);
em = lookup_extent_mapping(em_tree, logical, len);
read_unlock(&em_tree->lock);
BUG_ON(!em);
BUG_ON(em->start > logical || em->start + em->len < logical);
map = em->map_lookup;
if (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK)
ret = 1;
free_extent_map(em);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| david woodhouse | david woodhouse | 120 | 98.36% | 1 | 33.33% |
| jeff mahoney | jeff mahoney | 1 | 0.82% | 1 | 33.33% |
| zhao lei | zhao lei | 1 | 0.82% | 1 | 33.33% |
| Total | 122 | 100.00% | 3 | 100.00% |
static int find_live_mirror(struct btrfs_fs_info *fs_info,
struct map_lookup *map, int first, int num,
int optimal, int dev_replace_is_ongoing)
{
int i;
int tolerance;
struct btrfs_device *srcdev;
if (dev_replace_is_ongoing &&
fs_info->dev_replace.cont_reading_from_srcdev_mode ==
BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID)
srcdev = fs_info->dev_replace.srcdev;
else
srcdev = NULL;
/*
* try to avoid the drive that is the source drive for a
* dev-replace procedure, only choose it if no other non-missing
* mirror is available
*/
for (tolerance = 0; tolerance < 2; tolerance++) {
if (map->stripes[optimal].dev->bdev &&
(tolerance || map->stripes[optimal].dev != srcdev))
return optimal;
for (i = first; i < first + num; i++) {
if (map->stripes[i].dev->bdev &&
(tolerance || map->stripes[i].dev != srcdev))
return i;
}
}
/* we couldn't find one that doesn't fail. Just return something
* and the io error handling code will clean up eventually
*/
return optimal;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| stefan behrens | stefan behrens | 60 | 36.81% | 1 | 33.33% |
| chris mason | chris mason | 54 | 33.13% | 1 | 33.33% |
| david woodhouse | david woodhouse | 49 | 30.06% | 1 | 33.33% |
| Total | 163 | 100.00% | 3 | 100.00% |
static inline int parity_smaller(u64 a, u64 b)
{
return a > b;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| david woodhouse | david woodhouse | 18 | 100.00% | 1 | 100.00% |
| Total | 18 | 100.00% | 1 | 100.00% |
/* Bubble-sort the stripe set to put the parity/syndrome stripes last */
static void sort_parity_stripes(struct btrfs_bio *bbio, int num_stripes)
{
struct btrfs_bio_stripe s;
int i;
u64 l;
int again = 1;
while (again) {
again = 0;
for (i = 0; i < num_stripes - 1; i++) {
if (parity_smaller(bbio->raid_map[i],
bbio->raid_map[i+1])) {
s = bbio->stripes[i];
l = bbio->raid_map[i];
bbio->stripes[i] = bbio->stripes[i+1];
bbio->raid_map[i] = bbio->raid_map[i+1];
bbio->stripes[i+1] = s;
bbio->raid_map[i+1] = l;
again = 1;
}
}
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| david woodhouse | david woodhouse | 140 | 90.32% | 1 | 33.33% |
| zhao lei | zhao lei | 15 | 9.68% | 2 | 66.67% |
| Total | 155 | 100.00% | 3 | 100.00% |
static struct btrfs_bio *alloc_btrfs_bio(int total_stripes, int real_stripes)
{
struct btrfs_bio *bbio = kzalloc(
/* the size of the btrfs_bio */
sizeof(struct btrfs_bio) +
/* plus the variable array for the stripes */
sizeof(struct btrfs_bio_stripe) * (total_stripes) +
/* plus the variable array for the tgt dev */
sizeof(int) * (real_stripes) +
/*
* plus the raid_map, which includes both the tgt dev
* and the stripes
*/
sizeof(u64) * (total_stripes),
GFP_NOFS|__GFP_NOFAIL);
atomic_set(&bbio->error, 0);
atomic_set(&bbio->refs, 1);
return bbio;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| zhao lei | zhao lei | 80 | 91.95% | 1 | 33.33% |
| chris mason | chris mason | 5 | 5.75% | 1 | 33.33% |
| michal hocko | michal hocko | 2 | 2.30% | 1 | 33.33% |
| Total | 87 | 100.00% | 3 | 100.00% |
void btrfs_get_bbio(struct btrfs_bio *bbio)
{
WARN_ON(!atomic_read(&bbio->refs));
atomic_inc(&bbio->refs);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| zhao lei | zhao lei | 30 | 100.00% | 1 | 100.00% |
| Total | 30 | 100.00% | 1 | 100.00% |
void btrfs_put_bbio(struct btrfs_bio *bbio)
{
if (!bbio)
return;
if (atomic_dec_and_test(&bbio->refs))
kfree(bbio);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| zhao lei | zhao lei | 31 | 100.00% | 1 | 100.00% |
| Total | 31 | 100.00% | 1 | 100.00% |
static int __btrfs_map_block(struct btrfs_fs_info *fs_info,
enum btrfs_map_op op,
u64 logical, u64 *length,
struct btrfs_bio **bbio_ret,
int mirror_num, int need_raid_map)
{
struct extent_map *em;
struct map_lookup *map;
struct btrfs_mapping_tree *map_tree = &fs_info->mapping_tree;
struct extent_map_tree *em_tree = &map_tree->map_tree;
u64 offset;
u64 stripe_offset;
u64 stripe_end_offset;
u64 stripe_nr;
u64 stripe_nr_orig;
u64 stripe_nr_end;
u64 stripe_len;
u32 stripe_index;
int i;
int ret = 0;
int num_stripes;
int max_errors = 0;
int tgtdev_indexes = 0;
struct btrfs_bio *bbio = NULL;
struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;
int dev_replace_is_ongoing = 0;
int num_alloc_stripes;
int patch_the_first_stripe_for_dev_replace = 0;
u64 physical_to_patch_in_first_stripe = 0;
u64 raid56_full_stripe_start = (u64)-1;
read_lock(&em_tree->lock);
em = lookup_extent_mapping(em_tree, logical, *length);
read_unlock(&em_tree->lock);
if (!em) {
btrfs_crit(fs_info, "unable to find logical %llu len %llu",
logical, *length);
return -EINVAL;
}
if (em->start > logical || em->start + em->len < logical) {
btrfs_crit(fs_info,
"found a bad mapping, wanted %Lu, found %Lu-%Lu",
logical, em->start, em->start + em->len);
free_extent_map(em);
return -EINVAL;
}
map = em->map_lookup;
offset = logical - em->start;
stripe_len = map->stripe_len;
stripe_nr = offset;
/*
* stripe_nr counts the total number of stripes we have to stride
* to get to this block
*/
stripe_nr = div64_u64(stripe_nr, stripe_len);
stripe_offset = stripe_nr * stripe_len;
if (offset < stripe_offset) {
btrfs_crit(fs_info,
"stripe math has gone wrong, stripe_offset=%llu, offset=%llu, start=%llu, logical=%llu, stripe_len=%llu",
stripe_offset, offset, em->start, logical,
stripe_len);
free_extent_map(em);
return -EINVAL;
}
/* stripe_offset is the offset of this block in its stripe*/
stripe_offset = offset - stripe_offset;
/* if we're here for raid56, we need to know the stripe aligned start */
if (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK) {
unsigned long full_stripe_len = stripe_len * nr_data_stripes(map);
raid56_full_stripe_start = offset;
/* allow a write of a full stripe, but make sure we don't
* allow straddling of stripes
*/
raid56_full_stripe_start = div64_u64(raid56_full_stripe_start,
full_stripe_len);
raid56_full_stripe_start *= full_stripe_len;
}
if (op == BTRFS_MAP_DISCARD) {
/* we don't discard raid56 yet */
if (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK) {
ret = -EOPNOTSUPP;
goto out;
}
*length = min_t(u64, em->len - offset, *length);
} else if (map->type & BTRFS_BLOCK_GROUP_PROFILE_MASK) {
u64 max_len;
/* For writes to RAID[56], allow a full stripeset across all disks.
For other RAID types and for RAID[56] reads, just allow a single
stripe (on a single disk). */
if ((map->type & BTRFS_BLOCK_GROUP_RAID56_MASK) &&
(op == BTRFS_MAP_WRITE)) {
max_len = stripe_len * nr_data_stripes(map) -
(offset - raid56_full_stripe_start);
} else {
/* we limit the length of each bio to what fits in a stripe */
max_len = stripe_len - stripe_offset;
}
*length = min_t(u64, em->len - offset, max_len);
} else {
*length = em->len - offset;
}
/* This is for when we're called from btrfs_merge_bio_hook() and all
it cares about is the length */
if (!bbio_ret)
goto out;
btrfs_dev_replace_lock(dev_replace, 0);
dev_replace_is_ongoing = btrfs_dev_replace_is_ongoing(dev_replace);
if (!dev_replace_is_ongoing)
btrfs_dev_replace_unlock(dev_replace, 0);
else
btrfs_dev_replace_set_lock_blocking(dev_replace);
if (dev_replace_is_ongoing && mirror_num == map->num_stripes + 1 &&
op != BTRFS_MAP_WRITE && op != BTRFS_MAP_DISCARD &&
op != BTRFS_MAP_GET_READ_MIRRORS && dev_replace->tgtdev != NULL) {
/*
* in dev-replace case, for repair case (that's the only
* case where the mirror is selected explicitly when
* calling btrfs_map_block), blocks left of the left cursor
* can also be read from the target drive.
* For REQ_GET_READ_MIRRORS, the target drive is added as
* the last one to the array of stripes. For READ, it also
* needs to be supported using the same mirror number.
* If the requested block is not left of the left cursor,
* EIO is returned. This can happen because btrfs_num_copies()
* returns one more in the dev-replace case.
*/
u64 tmp_length = *length;
struct btrfs_bio *tmp_bbio = NULL;
int tmp_num_stripes;
u64 srcdev_devid = dev_replace->srcdev->devid;
int index_srcdev = 0;
int found = 0;
u64 physical_of_found = 0;
ret = __btrfs_map_block(fs_info, BTRFS_MAP_GET_READ_MIRRORS,
logical, &tmp_length, &tmp_bbio, 0, 0);
if (ret) {
WARN_ON(tmp_bbio != NULL);
goto out;
}
tmp_num_stripes = tmp_bbio->num_stripes;
if (mirror_num > tmp_num_stripes) {
/*
* BTRFS_MAP_GET_READ_MIRRORS does not contain this
* mirror, that means that the requested area
* is not left of the left cursor
*/
ret = -EIO;
btrfs_put_bbio(tmp_bbio);
goto out;
}
/*
* process the rest of the function using the mirror_num
* of the source drive. Therefore look it up first.
* At the end, patch the device pointer to the one of the
* target drive.
*/
for (i = 0; i < tmp_num_stripes; i++) {
if (tmp_bbio->stripes[i].dev->devid != srcdev_devid)
continue;
/*
* In case of DUP, in order to keep it simple, only add
* the mirror with the lowest physical address
*/
if (found &&
physical_of_found <= tmp_bbio->stripes[i].physical)
continue;
index_srcdev = i;
found = 1;
physical_of_found = tmp_bbio->stripes[i].physical;
}
btrfs_put_bbio(tmp_bbio);
if (!found) {
WARN_ON(1);
ret = -EIO;
goto out;
}
mirror_num = index_srcdev + 1;
patch_the_first_stripe_for_dev_replace = 1;
physical_to_patch_in_first_stripe = physical_of_found;
} else if (mirror_num > map->num_stripes) {
mirror_num = 0;
}
num_stripes = 1;
stripe_index = 0;
stripe_nr_orig = stripe_nr;
stripe_nr_end = ALIGN(offset + *length, map->stripe_len);
stripe_nr_end = div_u64(stripe_nr_end, map->stripe_len);
stripe_end_offset = stripe_nr_end * map->stripe_len -
(offset + *length);
if (map->type & BTRFS_BLOCK_GROUP_RAID0) {
if (op == BTRFS_MAP_DISCARD)
num_stripes = min_t(u64, map->num_stripes,
stripe_nr_end - stripe_nr_orig);
stripe_nr = div_u64_rem(stripe_nr, map->num_stripes,
&stripe_index);
if (op != BTRFS_MAP_WRITE && op != BTRFS_MAP_DISCARD &&
op != BTRFS_MAP_GET_READ_MIRRORS)
mirror_num = 1;
} else if (map->type & BTRFS_BLOCK_GROUP_RAID1) {
if (op == BTRFS_MAP_WRITE || op == BTRFS_MAP_DISCARD ||
op == BTRFS_MAP_GET_READ_MIRRORS)
num_stripes = map->num_stripes;
else if (mirror_num)
stripe_index = mirror_num - 1;
else {
stripe_index = find_live_mirror(fs_info, map, 0,
map->num_stripes,
current->pid % map->num_stripes,
dev_replace_is_ongoing);
mirror_num = stripe_index + 1;
}
} else if (map->type & BTRFS_BLOCK_GROUP_DUP) {
if (op == BTRFS_MAP_WRITE || op == BTRFS_MAP_DISCARD ||
op == BTRFS_MAP_GET_READ_MIRRORS) {
num_stripes = map->num_stripes;
} else if (mirror_num) {
stripe_index = mirror_num - 1;
} else {
mirror_num = 1;
}
} else if (map->type & BTRFS_BLOCK_GROUP_RAID10) {
u32 factor = map->num_stripes / map->sub_stripes;
stripe_nr = div_u64_rem(stripe_nr, factor, &stripe_index);
stripe_index *= map->sub_stripes;
if (op == BTRFS_MAP_WRITE || op == BTRFS_MAP_GET_READ_MIRRORS)
num_stripes = map->sub_stripes;
else if (op == BTRFS_MAP_DISCARD)
num_stripes = min_t(u64, map->sub_stripes *
(stripe_nr_end - stripe_nr_orig),
map->num_stripes);
else if (mirror_num)
stripe_index += mirror_num - 1;
else {
int old_stripe_index = stripe_index;
stripe_index = find_live_mirror(fs_info, map,
stripe_index,
map->sub_stripes, stripe_index +
current->pid % map->sub_stripes,
dev_replace_is_ongoing);
mirror_num = stripe_index - old_stripe_index + 1;
}
} else if (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK) {
if (need_raid_map &&
(op == BTRFS_MAP_WRITE || op == BTRFS_MAP_GET_READ_MIRRORS ||
mirror_num > 1)) {
/* push stripe_nr back to the start of the full stripe */
stripe_nr = div_u64(raid56_full_stripe_start,
stripe_len * nr_data_stripes(map));
/* RAID[56] write or recovery. Return all stripes */
num_stripes = map->num_stripes;
max_errors = nr_parity_stripes(map);
*length = map->stripe_len;
stripe_index = 0;
stripe_offset = 0;
} else {
/*
* Mirror #0 or #1 means the original data block.
* Mirror #2 is RAID5 parity block.
* Mirror #3 is RAID6 Q block.
*/
stripe_nr = div_u64_rem(stripe_nr,
nr_data_stripes(map), &stripe_index);
if (mirror_num > 1)
stripe_index = nr_data_stripes(map) +
mirror_num - 2;
/* We distribute the parity blocks across stripes */
div_u64_rem(stripe_nr + stripe_index, map->num_stripes,
&stripe_index);
if ((op != BTRFS_MAP_WRITE && op != BTRFS_MAP_DISCARD &&
op != BTRFS_MAP_GET_READ_MIRRORS) && mirror_num <= 1)
mirror_num = 1;
}
} else {
/*
* after this, stripe_nr is the number of stripes on this
* device we have to walk to find the data, and stripe_index is
* the number of our device in the stripe array
*/
stripe_nr = div_u64_rem(stripe_nr, map->num_stripes,
&stripe_index);
mirror_num = stripe_index + 1;
}
if (stripe_index >= map->num_stripes) {
btrfs_crit(fs_info,
"stripe index math went horribly wrong, got stripe_index=%u, num_stripes=%u",
stripe_index, map->num_stripes);
ret = -EINVAL;
goto out;
}
num_alloc_stripes = num_stripes;
if (dev_replace_is_ongoing) {
if (op == BTRFS_MAP_WRITE || op == BTRFS_MAP_DISCARD)
num_alloc_stripes <<= 1;
if (op == BTRFS_MAP_GET_READ_MIRRORS)
num_alloc_stripes++;
tgtdev_indexes = num_stripes;
}
bbio = alloc_btrfs_bio(num_alloc_stripes, tgtdev_indexes);
if (!bbio) {
ret = -ENOMEM;
goto out;
}
if (dev_replace_is_ongoing)
bbio->tgtdev_map = (int *)(bbio->stripes + num_alloc_stripes);
/* build raid_map */
if (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK &&
need_raid_map &&
((op == BTRFS_MAP_WRITE || op == BTRFS_MAP_GET_READ_MIRRORS) ||
mirror_num > 1)) {
u64 tmp;
unsigned rot;
bbio->raid_map = (u64 *)((void *)bbio->stripes +
sizeof(struct btrfs_bio_stripe) *
num_alloc_stripes +
sizeof(int) * tgtdev_indexes);
/* Work out the disk rotation on this stripe-set */
div_u64_rem(stripe_nr, num_stripes, &rot);
/* Fill in the logical address of each stripe */
tmp = stripe_nr * nr_data_stripes(map);
for (i = 0; i < nr_data_stripes(map); i++)
bbio->raid_map[(i+rot) % num_stripes] =
em->start + (tmp + i) * map->stripe_len;
bbio->raid_map[(i+rot) % map->num_stripes] = RAID5_P_STRIPE;
if (map->type & BTRFS_BLOCK_GROUP_RAID6)
bbio->raid_map[(i+rot+1) % num_stripes] =
RAID6_Q_STRIPE;
}
if (op == BTRFS_MAP_DISCARD) {
u32 factor = 0;
u32 sub_stripes = 0;
u64 stripes_per_dev = 0;
u32 remaining_stripes = 0;
u32 last_stripe = 0;
if (map->type &
(BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID10)) {
if (map->type & BTRFS_BLOCK_GROUP_RAID0)
sub_stripes = 1;
else
sub_stripes = map->sub_stripes;
factor = map->num_stripes / sub_stripes;
stripes_per_dev = div_u64_rem(stripe_nr_end -
stripe_nr_orig,
factor,
&remaining_stripes);
div_u64_rem(stripe_nr_end - 1, factor, &last_stripe);
last_stripe *= sub_stripes;
}
for (i = 0; i < num_stripes; i++) {
bbio->stripes[i].physical =
map->stripes[stripe_index].physical +
stripe_offset + stripe_nr * map->stripe_len;
bbio->stripes[i].dev = map->stripes[stripe_index].dev;
if (map->type & (BTRFS_BLOCK_GROUP_RAID0 |
BTRFS_BLOCK_GROUP_RAID10)) {
bbio->stripes[i].length = stripes_per_dev *
map->stripe_len;
if (i / sub_stripes < remaining_stripes)
bbio->stripes[i].length +=
map->stripe_len;
/*
* Special for the first stripe and
* the last stripe:
*
* |-------|...|-------|
* |----------|
* off end_off
*/
if (i < sub_stripes)
bbio->stripes[i].length -=
stripe_offset;
if (stripe_index >= last_stripe &&
stripe_index <= (last_stripe +
sub_stripes - 1))
bbio->stripes[i].length -=
stripe_end_offset;
if (i == sub_stripes - 1)
stripe_offset = 0;
} else
bbio->stripes[i].length = *length;
stripe_index++;
if (stripe_index == map->num_stripes) {
/* This could only happen for RAID0/10 */
stripe_index = 0;
stripe_nr++;
}
}
} else {
for (i = 0; i < num_stripes; i++) {
bbio->stripes[i].physical =
map->stripes[stripe_index].physical +
stripe_offset +
stripe_nr * map->stripe_len;
bbio->stripes[i].dev =
map->stripes[stripe_index].dev;
stripe_index++;
}
}
if (op == BTRFS_MAP_WRITE || op == BTRFS_MAP_GET_READ_MIRRORS)
max_errors = btrfs_chunk_max_errors(map);
if (bbio->raid_map)
sort_parity_stripes(bbio, num_stripes);
tgtdev_indexes = 0;
if (dev_replace_is_ongoing &&
(op == BTRFS_MAP_WRITE || op == BTRFS_MAP_DISCARD) &&
dev_replace->tgtdev != NULL) {
int index_where_to_add;
u64 srcdev_devid = dev_replace->srcdev->devid;
/*
* duplicate the write operations while the dev replace
* procedure is running. Since the copying of the old disk
* to the new disk takes place at run time while the
* filesystem is mounted writable, the regular write
* operations to the old disk have to be duplicated to go
* to the new disk as well.
* Note that device->missing is handled by the caller, and
* that the write to the old disk is already set up in the
* stripes array.
*/
index_where_to_add = num_stripes;
for (i = 0; i < num_stripes; i++) {
if (bbio->stripes[i].dev->devid == srcdev_devid) {
/* write to new disk, too */
struct btrfs_bio_stripe *new =
bbio->stripes + index_where_to_add;
struct btrfs_bio_stripe *old =
bbio->stripes + i;
new->physical = old->physical;
new->length = old->length;
new->dev = dev_replace->tgtdev;
bbio->tgtdev_map[i] = index_where_to_add;
index_where_to_add++;
max_errors++;
tgtdev_indexes++;
}
}
num_stripes = index_where_to_add;
} else if (dev_replace_is_ongoing &&
op == BTRFS_MAP_GET_READ_MIRRORS &&
dev_replace->tgtdev != NULL) {
u64 srcdev_devid = dev_replace->srcdev->devid;
int index_srcdev = 0;
int found = 0;
u64 physical_of_found = 0;
/*
* During the dev-replace procedure, the target drive can
* also be used to read data in case it is needed to repair
* a corrupt block elsewhere. This is possible if the
* requested area is left of the left cursor. In this area,
* the target drive is a full copy of the source drive.
*/
for (i = 0; i < num_stripes; i++) {
if (bbio->stripes[i].dev->devid == srcdev_devid) {
/*
* In case of DUP, in order to keep it
* simple, only add the mirror with the
* lowest physical address
*/
if (found &&
physical_of_found <=
bbio->stripes[i].physical)
continue;
index_srcdev = i;
found = 1;
physical_of_found = bbio->stripes[i].physical;
}
}
if (found) {
struct btrfs_bio_stripe *tgtdev_stripe =
bbio->stripes + num_stripes;
tgtdev_stripe->physical = physical_of_found;
tgtdev_stripe->length =
bbio->stripes[index_srcdev].length;
tgtdev_stripe->dev = dev_replace->tgtdev;
bbio->tgtdev_map[index_srcdev] = num_stripes;
tgtdev_indexes++;
num_stripes++;
}
}
*bbio_ret = bbio;
bbio->map_type = map->type;
bbio->num_stripes = num_stripes;
bbio->max_errors = max_errors;
bbio->mirror_num = mirror_num;
bbio->num_tgtdevs = tgtdev_indexes;
/*
* this is the case that REQ_READ && dev_replace_is_ongoing &&
* mirror_num == num_stripes + 1 && dev_replace target drive is
* available as a mirror
*/
if (patch_the_first_stripe_for_dev_replace && num_stripes > 0) {
WARN_ON(num_stripes > 1);
bbio->stripes[0].dev = dev_replace->tgtdev;
bbio->stripes[0].physical = physical_to_patch_in_first_stripe;
bbio->mirror_num = map->num_stripes + 1;
}
out:
if (dev_replace_is_ongoing) {
btrfs_dev_replace_clear_lock_blocking(dev_replace);
btrfs_dev_replace_unlock(dev_replace, 0);
}
free_extent_map(em);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| stefan behrens | stefan behrens | 648 | 26.14% | 4 | 7.69% |
| chris mason | chris mason | 383 | 15.45% | 16 | 30.77% |
| david woodhouse | david woodhouse | 363 | 14.64% | 1 | 1.92% |
| li dongyang | li dongyang | 334 | 13.47% | 1 | 1.92% |
| zhao lei | zhao lei | 216 | 8.71% | 7 | 13.46% |
| li zefan | li zefan | 89 | 3.59% | 2 | 3.85% |
| miao xie | miao xie | 88 | 3.55% | 3 | 5.77% |
| michael christie | michael christie | 83 | 3.35% | 1 | 1.92% |
| josef bacik | josef bacik | 82 | 3.31% | 2 | 3.85% |
| liu bo | liu bo | 55 | 2.22% | 3 | 5.77% |
| david sterba | david sterba | 47 | 1.90% | 3 | 5.77% |
| christoph hellwig | christoph hellwig | 38 | 1.53% | 1 | 1.92% |
| jan schmidt | jan schmidt | 38 | 1.53% | 2 | 3.85% |
| simon kirby | simon kirby | 4 | 0.16% | 1 | 1.92% |
| qu wenruo | qu wenruo | 4 | 0.16% | 1 | 1.92% |
| jeff mahoney | jeff mahoney | 4 | 0.16% | 2 | 3.85% |
| vincent stehle | vincent stehle | 2 | 0.08% | 1 | 1.92% |
| ilya dryomov | ilya dryomov | 1 | 0.04% | 1 | 1.92% |
| Total | 2479 | 100.00% | 52 | 100.00% |
int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op,
u64 logical, u64 *length,
struct btrfs_bio **bbio_ret, int mirror_num)
{
return __btrfs_map_block(fs_info, op, logical, length, bbio_ret,
mirror_num, 0);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chris mason | chris mason | 36 | 75.00% | 1 | 14.29% |
| stefan behrens | stefan behrens | 3 | 6.25% | 1 | 14.29% |
| jan schmidt | jan schmidt | 3 | 6.25% | 1 | 14.29% |
| michael christie | michael christie | 2 | 4.17% | 1 | 14.29% |
| christoph hellwig | christoph hellwig | 2 | 4.17% | 1 | 14.29% |
| zhao lei | zhao lei | 1 | 2.08% | 1 | 14.29% |
| david woodhouse | david woodhouse | 1 | 2.08% | 1 | 14.29% |
| Total | 48 | 100.00% | 7 | 100.00% |
/* For Scrub/replace */
int btrfs_map_sblock(struct btrfs_fs_info *fs_info, enum btrfs_map_op op,
u64 logical, u64 *length,
struct btrfs_bio **bbio_ret, int mirror_num,
int need_raid_map)
{
return __btrfs_map_block(fs_info, op, logical, length, bbio_ret,
mirror_num, need_raid_map);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| miao xie | miao xie | 44 | 86.27% | 1 | 25.00% |
| zhao lei | zhao lei | 3 | 5.88% | 1 | 25.00% |
| michael christie | michael christie | 2 | 3.92% | 1 | 25.00% |
| christoph hellwig | christoph hellwig | 2 | 3.92% | 1 | 25.00% |
| Total | 51 | 100.00% | 4 | 100.00% |
int btrfs_rmap_block(struct btrfs_fs_info *fs_info,
u64 chunk_start, u64 physical, u64 devid,
u64 **logical, int *naddrs, int *stripe_len)
{
struct btrfs_mapping_tree *map_tree = &fs_info->mapping_tree;
struct extent_map_tree *em_tree = &map_tree->map_tree;
struct extent_map *em;
struct map_lookup *map;
u64 *buf;
u64 bytenr;
u64 length;
u64 stripe_nr;
u64 rmap_len;
int i, j, nr = 0;
read_lock(&em_tree->lock);
em = lookup_extent_mapping(em_tree, chunk_start, 1);
read_unlock(&em_tree->lock);
if (!em) {
btrfs_err(fs_info, "couldn't find em for chunk %Lu",
chunk_start);
return -EIO;
}
if (em->start != chunk_start) {
btrfs_err(fs_info, "bad chunk start, em=%Lu, wanted=%Lu",
em->start, chunk_start);
free_extent_map(em);
return -EIO;
}
map = em->map_lookup;
length = em->len;
rmap_len = map->stripe_len;
if (map->type & BTRFS_BLOCK_GROUP_RAID10)
length = div_u64(length, map->num_stripes / map->sub_stripes);
else if (map->type & BTRFS_BLOCK_GROUP_RAID0)
length = div_u64(length, map->num_stripes);
else if (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK) {
length = div_u64(length, nr_data_stripes(map));
rmap_len = map->stripe_len * nr_data_stripes(map);
}
buf = kcalloc(map->num_stripes, sizeof(u64), GFP_NOFS);
BUG_ON(!buf); /* -ENOMEM */
for (i = 0; i < map->num_stripes; i++) {
if (devid && map->stripes[i].dev->devid != devid)
continue;
if (map->stripes[i].physical > physical ||
map->stripes[i].physical + length <= physical)
continue;
stripe_nr = physical - map->stripes[i].physical;
stripe_nr = div_u64(stripe_nr, map->stripe_len);
if (map->type & BTRFS_BLOCK_GROUP_RAID10) {
stripe_nr = stripe_nr * map->num_stripes + i;
stripe_nr = div_u64(stripe_nr, map->sub_stripes);
} else if (map->type & BTRFS_BLOCK_GROUP_RAID0) {
stripe_nr = stripe_nr * map->num_stripes + i;
} /* else if RAID[56], multiply by nr_data_stripes().
* Alternatively, just use rmap_len below instead of
* map->stripe_len */
bytenr = chunk_start + stripe_nr * rmap_len;
WARN_ON(nr >= map->num_stripes);
for (j = 0; j < nr; j++) {
if (buf[j] == bytenr)
break;
}
if (j == nr) {
WARN_ON(nr >= map->num_stripes);
buf[nr++] = bytenr;
}
}
*logical = buf;
*naddrs = nr;
*stripe_len = rmap_len;
free_extent_map(em);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| zheng yan | zheng yan | 333 | 64.91% | 1 | 6.25% |
| chris mason | chris mason | 60 | 11.70% | 7 | 43.75% |
| david woodhouse | david woodhouse | 42 | 8.19% | 1 | 6.25% |
| josef bacik | josef bacik | 35 | 6.82% | 1 | 6.25% |
| jeff mahoney | jeff mahoney | 22 | 4.29% | 3 | 18.75% |
| david sterba | david sterba | 20 | 3.90% | 2 | 12.50% |
| zhao lei | zhao lei | 1 | 0.19% | 1 | 6.25% |
| Total | 513 | 100.00% | 16 | 100.00% |
static inline void btrfs_end_bbio(struct btrfs_bio *bbio, struct bio *bio)
{
bio->bi_private = bbio->private;
bio->bi_end_io = bbio->end_io;
bio_endio(bio);
btrfs_put_bbio(bbio);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| miao xie | miao xie | 30 | 69.77% | 1 | 33.33% |
| mike snitzer | mike snitzer | 12 | 27.91% | 1 | 33.33% |
| zhao lei | zhao lei | 1 | 2.33% | 1 | 33.33% |
| Total | 43 | 100.00% | 3 | 100.00% |
static void btrfs_end_bio(struct bio *bio)
{
struct btrfs_bio *bbio = bio->bi_private;
int is_orig_bio = 0;
if (bio->bi_error) {
atomic_inc(&bbio->error);
if (bio->bi_error == -EIO || bio->bi_error == -EREMOTEIO) {
unsigned int stripe_index =
btrfs_io_bio(bio)->stripe_index;
struct btrfs_device *dev;
BUG_ON(stripe_index >= bbio->num_stripes);
dev = bbio->stripes[stripe_index].dev;
if (dev->bdev) {
if (bio_op(bio) == REQ_OP_WRITE)
btrfs_dev_stat_inc(dev,
BTRFS_DEV_STAT_WRITE_ERRS);
else
btrfs_dev_stat_inc(dev,
BTRFS_DEV_STAT_READ_ERRS);
if (bio->bi_opf & REQ_PREFLUSH)
btrfs_dev_stat_inc(dev,
BTRFS_DEV_STAT_FLUSH_ERRS);
btrfs_dev_stat_print_on_error(dev);
}
}
}
if (bio == bbio->orig_bio)
is_orig_bio = 1;
btrfs_bio_counter_dec(bbio->fs_info);
if (atomic_dec_and_test(&bbio->stripes_pending)) {
if (!is_orig_bio) {
bio_put(bio);
bio = bbio->orig_bio;
}
btrfs_io_bio(bio)->mirror_num = bbio->mirror_num;
/* only send an error to the higher layers if it is
* beyond the tolerance of the btrfs bio
*/
if (atomic_read(&bbio->error) > bbio->max_errors) {
bio->bi_error = -EIO;
} else {
/*
* this bio is actually up to date, we didn't
* go over the max number of errors
*/
bio->bi_error = 0;
}
btrfs_end_bbio(bbio, bio);
} else if (!is_orig_bio) {
bio_put(bio);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| stefan behrens | stefan behrens | 87 | 33.33% | 2 | 9.52% |
| zheng yan | zheng yan | 68 | 26.05% | 1 | 4.76% |
| chris mason | chris mason | 51 | 19.54% | 6 | 28.57% |
| jan schmidt | jan schmidt | 17 | 6.51% | 2 | 9.52% |
| christoph hellwig | christoph hellwig | 14 | 5.36% | 2 | 9.52% |
| miao xie | miao xie | 11 | 4.21% | 3 | 14.29% |
| michael christie | michael christie | 5 | 1.92% | 1 | 4.76% |
| zhao lei | zhao lei | 5 | 1.92% | 1 | 4.76% |
| miguel filipe | miguel filipe | 1 | 0.38% | 1 | 4.76% |
| david woodhouse | david woodhouse | 1 | 0.38% | 1 | 4.76% |
| jens axboe | jens axboe | 1 | 0.38% | 1 | 4.76% |
| Total | 261 | 100.00% | 21 | 100.00% |
/*
* see run_scheduled_bios for a description of why bios are collected for
* async submit.
*
* This will add one bio to the pending list for a device and make sure
* the work struct is scheduled.
*/
static noinline void btrfs_schedule_bio(struct btrfs_device *device,
struct bio *bio)
{
struct btrfs_fs_info *fs_info = device->fs_info;
int should_queue = 1;
struct btrfs_pending_bios *pending_bios;
if (device->missing || !device->bdev) {
bio_io_error(bio);
return;
}
/* don't bother with additional async steps for reads, right now */
if (bio_op(bio) == REQ_OP_READ) {
bio_get(bio);
btrfsic_submit_bio(bio);
bio_put(bio);
return;
}
/*
* nr_async_bios allows us to reliably return congestion to the
* higher layers. Otherwise, the async bio makes it appear we have
* made progress against dirty pages when we've really just put it
* on a queue for later
*/
atomic_inc(&fs_info->nr_async_bios);
WARN_ON(bio->bi_next);
bio->bi_next = NULL;
spin_lock(&device->io_lock);
if (op_is_sync(bio->bi_opf))
pending_bios = &device->pending_sync_bios;
else
pending_bios = &device->pending_bios;
if (pending_bios->tail)
pending_bios->tail->bi_next = bio;
pending_bios->tail = bio;
if (!pending_bios->head)
pending_bios->head = bio;
if (device->running_pending)
should_queue = 0;
spin_unlock(&device->io_lock);
if (should_queue)
btrfs_queue_work(fs_info->submit_workers, &device->work);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chris mason | chris mason | 159 | 77.94% | 6 | 33.33% |
| david woodhouse | david woodhouse | 19 | 9.31% | 1 | 5.56% |
| jeff mahoney | jeff mahoney | 11 | 5.39% | 2 | 11.11% |
| michael christie | michael christie | 6 | 2.94% | 2 | 11.11% |
| christoph hellwig | christoph hellwig | 5 | 2.45% | 3 | 16.67% |
| eric sandeen | eric sandeen | 1 | 0.49% | 1 | 5.56% |
| qu wenruo | qu wenruo | 1 | 0.49% | 1 | 5.56% |
| jens axboe | jens axboe | 1 | 0.49% | 1 | 5.56% |
| stefan behrens | stefan behrens | 1 | 0.49% | 1 | 5.56% |
| Total | 204 | 100.00% | 18 | 100.00% |
static void submit_stripe_bio(struct btrfs_bio *bbio, struct bio *bio,
u64 physical, int dev_nr, int async)
{
struct btrfs_device *dev = bbio->stripes[dev_nr].dev;
struct btrfs_fs_info *fs_info = bbio->fs_info;
bio->bi_private = bbio;
btrfs_io_bio(bio)->stripe_index = dev_nr;
bio->bi_end_io = btrfs_end_bio;
bio->bi_iter.bi_sector = physical >> 9;
#ifdef DEBUG
{
struct rcu_string *name;
rcu_read_lock();
name = rcu_dereference(dev->name);
btrfs_debug(fs_info,
"btrfs_map_bio: rw %d 0x%x, sector=%llu, dev=%lu (%s id %llu), size=%u",
bio_op(bio), bio->bi_opf,
(u64)bio->bi_iter.bi_sector,
(u_long)dev->bdev->bd_dev, name->str, dev->devid,
bio->bi_iter.bi_size);
rcu_read_unlock();
}
#endif
bio->bi_bdev = dev->bdev;
btrfs_bio_counter_inc_noblocked(fs_info);
if (async)
btrfs_schedule_bio(dev, bio);
else
btrfsic_submit_bio(bio);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| josef bacik | josef bacik | 147 | 79.89% | 1 | 10.00% |
| jeff mahoney | jeff mahoney | 13 | 7.07% | 2 | 20.00% |
| michael christie | michael christie | 7 | 3.80% | 1 | 10.00% |
| miao xie | miao xie | 5 | 2.72% | 1 | 10.00% |
| chris mason | chris mason | 4 | 2.17% | 1 | 10.00% |
| fabian frederick | fabian frederick | 4 | 2.17% | 1 | 10.00% |
| kent overstreet | kent overstreet | 2 | 1.09% | 1 | 10.00% |
| jens axboe | jens axboe | 1 | 0.54% | 1 | 10.00% |
| david woodhouse | david woodhouse | 1 | 0.54% | 1 | 10.00% |
| Total | 184 | 100.00% | 10 | 100.00% |
static void bbio_error(struct btrfs_bio *bbio, struct bio *bio, u64 logical)
{
atomic_inc(&bbio->error);
if (atomic_dec_and_test(&bbio->stripes_pending)) {
/* Should be the original bio. */
WARN_ON(bio != bbio->orig_bio);
btrfs_io_bio(bio)->mirror_num = bbio->mirror_num;
bio->bi_iter.bi_sector = logical >> 9;
bio->bi_error = -EIO;
btrfs_end_bbio(bbio, bio);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| josef bacik | josef bacik | 59 | 70.24% | 1 | 16.67% |
| miao xie | miao xie | 11 | 13.10% | 1 | 16.67% |
| christoph hellwig | christoph hellwig | 7 | 8.33% | 1 | 16.67% |
| chris mason | chris mason | 4 | 4.76% | 1 | 16.67% |
| kent overstreet | kent overstreet | 2 | 2.38% | 1 | 16.67% |
| nicholas d steeves | nicholas d steeves | 1 | 1.19% | 1 | 16.67% |
| Total | 84 | 100.00% | 6 | 100.00% |
int btrfs_map_bio(struct btrfs_fs_info *fs_info, struct bio *bio,
int mirror_num, int async_submit)
{
struct btrfs_device *dev;
struct bio *first_bio = bio;
u64 logical = (u64)bio->bi_iter.bi_sector << 9;
u64 length = 0;
u64 map_length;
int ret;
int dev_nr;
int total_devs;
struct btrfs_bio *bbio = NULL;
length = bio->bi_iter.bi_size;
map_length = length;
btrfs_bio_counter_inc_blocked(fs_info);
ret = __btrfs_map_block(fs_info, bio_op(bio), logical,
&map_length, &bbio, mirror_num, 1);
if (ret) {
btrfs_bio_counter_dec(fs_info);
return ret;
}
total_devs = bbio->num_stripes;
bbio->orig_bio = first_bio;
bbio->private = first_bio->bi_private;
bbio->end_io = first_bio->bi_end_io;
bbio->fs_info = fs_info;
atomic_set(&bbio->stripes_pending, bbio->num_stripes);
if ((bbio->map_type & BTRFS_BLOCK_GROUP_RAID56_MASK) &&
((bio_op(bio) == REQ_OP_WRITE) || (mirror_num > 1))) {
/* In this case, map_length has been set to the length of
a single stripe; not the whole write */
if (bio_op(bio) == REQ_OP_WRITE) {
ret = raid56_parity_write(fs_info, bio, bbio,
map_length);
} else {
ret = raid56_parity_recover(fs_info, bio, bbio,
map_length, mirror_num, 1);
}
btrfs_bio_counter_dec(fs_info);
return ret;
}
if (map_length < length) {
btrfs_crit(fs_info,
"mapping failed logical %llu bio len %llu len %llu",
logical, length, map_length);
BUG();
}
for (dev_nr = 0; dev_nr < total_devs; dev_nr++) {
dev = bbio->stripes[dev_nr].dev;
if (!dev || !dev->bdev ||
(bio_op(bio) == REQ_OP_WRITE && !dev->writeable)) {
bbio_error(bbio, first_bio, logical);
continue;
}
if (dev_nr < total_devs - 1) {
bio = btrfs_bio_clone(first_bio, GFP_NOFS);
BUG_ON(!bio); /* -ENOMEM */
} else
bio = first_bio;
submit_stripe_bio(bbio, bio, bbio->stripes[dev_nr].physical,
dev_nr, async_submit);
}
btrfs_bio_counter_dec(fs_info);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chris mason | chris mason | 164 | 41.10% | 11 | 40.74% |
| david woodhouse | david woodhouse | 70 | 17.54% | 1 | 3.70% |
| josef bacik | josef bacik | 46 | 11.53% | 2 | 7.41% |
| miao xie | miao xie | 39 | 9.77% | 3 | 11.11% |
| zhao lei | zhao lei | 29 | 7.27% | 3 | 11.11% |
| michael christie | michael christie | 22 | 5.51% | 1 | 3.70% |
| jan schmidt | jan schmidt | 10 | 2.51% | 1 | 3.70% |
| jeff mahoney | jeff mahoney | 10 | 2.51% | 2 | 7.41% |
| simon kirby | simon kirby | 4 | 1.00% | 1 | 3.70% |
| kent overstreet | kent overstreet | 4 | 1.00% | 1 | 3.70% |
| stefan behrens | stefan behrens | 1 | 0.25% | 1 | 3.70% |
| Total | 399 | 100.00% | 27 | 100.00% |
struct btrfs_device *btrfs_find_device(struct btrfs_fs_info *fs_info, u64 devid,
u8 *uuid, u8 *fsid)
{
struct btrfs_device *device;
struct btrfs_fs_devices *cur_devices;
cur_devices = fs_info->fs_devices;
while (cur_devices) {
if (!fsid ||
!memcmp(cur_devices->fsid, fsid, BTRFS_UUID_SIZE)) {
device = __find_device(&cur_devices->devices,
devid, uuid);
if (device)
return device;
}
cur_devices = cur_devices->seed;
}
return NULL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| zheng yan | zheng yan | 61 | 64.89% | 1 | 20.00% |
| chris mason | chris mason | 31 | 32.98% | 3 | 60.00% |
| stefan behrens | stefan behrens | 2 | 2.13% | 1 | 20.00% |
| Total | 94 | 100.00% | 5 | 100.00% |
static struct btrfs_device *add_missing_dev(struct btrfs_fs_devices *fs_devices,
u64 devid, u8 *dev_uuid)
{
struct btrfs_device *device;
device = btrfs_alloc_device(NULL, &devid, dev_uuid);
if (IS_ERR(device))
return NULL;
list_add(&device->dev_list, &fs_devices->devices);
device->fs_devices = fs_devices;
fs_devices->num_devices++;
device->missing = 1;
fs_devices->missing_devices++;
return device;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chris mason | chris mason | 53 | 62.35% | 2 | 33.33% |
| ilya dryomov | ilya dryomov | 17 | 20.00% | 1 | 16.67% |
| yanhai zhu | yanhai zhu | 7 | 8.24% | 1 | 16.67% |
| zheng yan | zheng yan | 4 | 4.71% | 1 | 16.67% |
| miao xie | miao xie | 4 | 4.71% | 1 | 16.67% |
| Total | 85 | 100.00% | 6 | 100.00% |
/**
* btrfs_alloc_device - allocate struct btrfs_device
* @fs_info: used only for generating a new devid, can be NULL if
* devid is provided (i.e. @devid != NULL).
* @devid: a pointer to devid for this device. If NULL a new devid
* is generated.
* @uuid: a pointer to UUID for this device. If NULL a new UUID
* is generated.
*
* Return: a pointer to a new &struct btrfs_device on success; ERR_PTR()
* on error. Returned struct is not linked onto any lists and can be
* destroyed with kfree() right away.
*/
struct btrfs_device *btrfs_alloc_device(struct btrfs_fs_info *fs_info,
const u64 *devid,
const u8 *uuid)
{
struct btrfs_device *dev;
u64 tmp;
if (WARN_ON(!devid && !fs_info))
return ERR_PTR(-EINVAL);
dev = __alloc_device();
if (IS_ERR(dev))
return dev;
if (devid)
tmp = *devid;
else {
int ret;
ret = find_next_devid(fs_info, &tmp);
if (ret) {
kfree(dev);
return ERR_PTR(ret);
}
}
dev->devid = tmp;
if (uuid)
memcpy(dev->uuid, uuid, BTRFS_UUID_SIZE);
else
generate_random_uuid(dev->uuid);
btrfs_init_work(&dev->work, btrfs_submit_helper,
pending_bios_fn, NULL, NULL);
return dev;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| ilya dryomov | ilya dryomov | 120 | 78.43% | 1 | 16.67% |
| chris mason | chris mason | 19 | 12.42% | 2 | 33.33% |
| qu wenruo | qu wenruo | 9 | 5.88% | 1 | 16.67% |
| dulshani gunawardhana | dulshani gunawardhana | 3 | 1.96% | 1 | 16.67% |
| liu bo | liu bo | 2 | 1.31% | 1 | 16.67% |
| Total | 153 | 100.00% | 6 | 100.00% |
/* Return -EIO if any error, otherwise return 0. */
static int btrfs_check_chunk_valid(struct btrfs_fs_info *fs_info,
struct extent_buffer *leaf,
struct btrfs_chunk *chunk, u64 logical)
{
u64 length;
u64 stripe_len;
u16 num_stripes;
u16 sub_stripes;
u64 type;
length = btrfs_chunk_length(leaf, chunk);
stripe_len = btrfs_chunk_stripe_len(leaf, chunk);
num_stripes = btrfs_chunk_num_stripes(leaf, chunk);
sub_stripes = btrfs_chunk_sub_stripes(leaf, chunk);
type = btrfs_chunk_type(leaf, chunk);
if (!num_stripes) {
btrfs_err(fs_info, "invalid chunk num_stripes: %u",
num_stripes);
return -EIO;
}
if (!IS_ALIGNED(logical, fs_info->sectorsize)) {
btrfs_err(fs_info, "invalid chunk logical %llu", logical);
return -EIO;
}
if (btrfs_chunk_sector_size(leaf, chunk) != fs_info->sectorsize) {
btrfs_err(fs_info, "invalid chunk sectorsize %u",
btrfs_chunk_sector_size(leaf, chunk));
return -EIO;
}
if (!length || !IS_ALIGNED(length, fs_info->sectorsize)) {
btrfs_err(fs_info, "invalid chunk length %llu", length);
return -EIO;
}
if (!is_power_of_2(stripe_len) || stripe_len != BTRFS_STRIPE_LEN) {
btrfs_err(fs_info, "invalid chunk stripe length: %llu",
stripe_len);
return -EIO;
}
if (~(BTRFS_BLOCK_GROUP_TYPE_MASK | BTRFS_BLOCK_GROUP_PROFILE_MASK) &
type) {
btrfs_err(fs_info, "unrecognized chunk type: %llu",
~(BTRFS_BLOCK_GROUP_TYPE_MASK |
BTRFS_BLOCK_GROUP_PROFILE_MASK) &
btrfs_chunk_type(leaf, chunk));
return -EIO;
}
if ((type & BTRFS_BLOCK_GROUP_RAID10 && sub_stripes != 2) ||
(type & BTRFS_BLOCK_GROUP_RAID1 && num_stripes < 1) ||
(type & BTRFS_BLOCK_GROUP_RAID5 && num_stripes < 2) ||
(type & BTRFS_BLOCK_GROUP_RAID6 && num_stripes < 3) ||
(type & BTRFS_BLOCK_GROUP_DUP && num_stripes > 2) ||
((type & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0 &&
num_stripes != 1)) {
btrfs_err(fs_info,
"invalid num_stripes:sub_stripes %u:%u for profile %llu",
num_stripes, sub_stripes,
type & BTRFS_BLOCK_GROUP_PROFILE_MASK);
return -EIO;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| liu bo | liu bo | 155 | 44.41% | 2 | 25.00% |
| qu wenruo | qu wenruo | 155 | 44.41% | 1 | 12.50% |
| chris mason | chris mason | 34 | 9.74% | 3 | 37.50% |
| jeff mahoney | jeff mahoney | 5 | 1.43% | 2 | 25.00% |
| Total | 349 | 100.00% | 8 | 100.00% |
static int read_one_chunk(struct btrfs_fs_info *fs_info, struct btrfs_key *key,
struct extent_buffer *leaf,
struct btrfs_chunk *chunk)
{
struct btrfs_mapping_tree *map_tree = &fs_info->mapping_tree;
struct map_lookup *map;
struct extent_map *em;
u64 logical;
u64 length;
u64 stripe_len;
u64 devid;
u8 uuid[BTRFS_UUID_SIZE];
int num_stripes;
int ret;
int i;
logical = key->offset;
length = btrfs_chunk_length(leaf, chunk);
stripe_len = btrfs_chunk_stripe_len(leaf, chunk);
num_stripes = btrfs_chunk_num_stripes(leaf, chunk);
ret = btrfs_check_chunk_valid(fs_info, leaf, chunk, logical);
if (ret)
return ret;
read_lock(&map_tree->map_tree.lock);
em = lookup_extent_mapping(&map_tree->map_tree, logical, 1);
read_unlock(&map_tree->map_tree.lock);
/* already mapped? */
if (em && em->start <= logical && em->start + em->len > logical) {
free_extent_map(em);
return 0;
} else if (em) {
free_extent_map(em);
}
em = alloc_extent_map();
if (!em)
return -ENOMEM;
map = kmalloc(map_lookup_size(num_stripes), GFP_NOFS);
if (!map) {
free_extent_map(em);
return -ENOMEM;
}
set_bit(EXTENT_FLAG_FS_MAPPING, &em->flags);
em->map_lookup = map;
em->start = logical;
em->len = length;
em->orig_start = 0;
em->block_start = 0;
em->block_len = em->len;
map->num_stripes = num_stripes;
map->io_width = btrfs_chunk_io_width(leaf, chunk);
map->io_align = btrfs_chunk_io_align(leaf, chunk);
map->sector_size = btrfs_chunk_sector_size(leaf, chunk);
map->stripe_len = btrfs_chunk_stripe_len(leaf, chunk);
map->type = btrfs_chunk_type(leaf, chunk);
map->sub_stripes = btrfs_chunk_sub_stripes(leaf, chunk);
for (i = 0; i < num_stripes; i++) {
map->stripes[i].physical =
btrfs_stripe_offset_nr(leaf, chunk, i);
devid = btrfs_stripe_devid_nr(leaf, chunk, i);
read_extent_buffer(leaf, uuid, (unsigned long)
btrfs_stripe_dev_uuid_nr(chunk, i),
BTRFS_UUID_SIZE);
map->stripes[i].dev = btrfs_find_device(fs_info, devid,
uuid, NULL);
if (!map->stripes[i].dev &&
!btrfs_test_opt(fs_info, DEGRADED)) {
free_extent_map(em);
return -EIO;
}
if (!map->stripes[i].dev) {
map->stripes[i].dev =
add_missing_dev(fs_info->fs_devices, devid,
uuid);
if (!map->stripes[i].dev) {
free_extent_map(em);
return -EIO;
}
btrfs_warn(fs_info, "devid %llu uuid %pU is missing",
devid, uuid);
}
map->stripes[i].dev->in_fs_metadata = 1;
}
write_lock(&map_tree->map_tree.lock);
ret = add_extent_mapping(&map_tree->map_tree, em, 0);
write_unlock(&map_tree->map_tree.lock);
BUG_ON(ret); /* Tree corruption */
free_extent_map(em);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chris mason | chris mason | 444 | 72.91% | 8 | 38.10% |
| liu bo | liu bo | 122 | 20.03% | 1 | 4.76% |
| anand jain | anand jain | 11 | 1.81% | 1 | 4.76% |
| wang shilong | wang shilong | 10 | 1.64% | 1 | 4.76% |
| josef bacik | josef bacik | 8 | 1.31% | 2 | 9.52% |
| jeff mahoney | jeff mahoney | 6 | 0.99% | 4 | 19.05% |
| miao xie | miao xie | 4 | 0.66% | 1 | 4.76% |
| zheng yan | zheng yan | 2 | 0.33% | 1 | 4.76% |
| stefan behrens | stefan behrens | 1 | 0.16% | 1 | 4.76% |
| david sterba | david sterba | 1 | 0.16% | 1 | 4.76% |
| Total | 609 | 100.00% | 21 | 100.00% |
static void fill_device_from_item(struct extent_buffer *leaf,
struct btrfs_dev_item *dev_item,
struct btrfs_device *device)
{
unsigned long ptr;
device->devid = btrfs_device_id(leaf, dev_item);
device->disk_total_bytes = btrfs_device_total_bytes(leaf, dev_item);
device->total_bytes = device->disk_total_bytes;
device->commit_total_bytes = device->disk_total_bytes;
device->bytes_used = btrfs_device_bytes_used(leaf, dev_item);
device->commit_bytes_used = device->bytes_used;
device->type = btrfs_device_type(leaf, dev_item);
device->io_align = btrfs_device_io_align(leaf, dev_item);
device->io_width = btrfs_device_io_width(leaf, dev_item);
device->sector_size = btrfs_device_sector_size(leaf, dev_item);
WARN_ON(device->devid == BTRFS_DEV_REPLACE_DEVID);
device->is_tgtdev_for_dev_replace = 0;
ptr = btrfs_device_uuid(dev_item);
read_extent_buffer(leaf, device->uuid, ptr, BTRFS_UUID_SIZE);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chris mason | chris mason | 63 | 39.13% | 1 | 12.50% |
| zheng yan | zheng yan | 57 | 35.40% | 1 | 12.50% |
| miao xie | miao xie | 16 | 9.94% | 2 | 25.00% |
| stefan behrens | stefan behrens | 15 | 9.32% | 2 | 25.00% |
| chris ball | chris ball | 9 | 5.59% | 1 | 12.50% |
| jeff mahoney | jeff mahoney | 1 | 0.62% | 1 | 12.50% |
| Total | 161 | 100.00% | 8 | 100.00% |
static struct btrfs_fs_devices *open_seed_devices(struct btrfs_fs_info *fs_info,
u8 *fsid)
{
struct btrfs_fs_devices *fs_devices;
int ret;
BUG_ON(!mutex_is_locked(&uuid_mutex));
fs_devices = fs_info->fs_devices->seed;
while (fs_devices) {
if (!memcmp(fs_devices->fsid, fsid, BTRFS_UUID_SIZE))
return fs_devices;
fs_devices = fs_devices->seed;
}
fs_devices = find_fsid(fsid);
if (!fs_devices) {
if (!btrfs_test_opt(fs_info, DEGRADED))
return ERR_PTR(-ENOENT);
fs_devices = alloc_fs_devices(fsid);
if (IS_ERR(fs_devices))
return fs_devices;
fs_devices->seeding = 1;
fs_devices->opened = 1;
return fs_devices;
}
fs_devices = clone_fs_devices(fs_devices);
if (IS_ERR(fs_devices))
return fs_devices;
ret = __btrfs_open_devices(fs_devices, FMODE_READ,
fs_info->bdev_holder);
if (ret) {
free_fs_devices(fs_devices);
fs_devices = ERR_PTR(ret);
goto out;
}
if (!fs_devices->seeding) {
__btrfs_close_devices(fs_devices);
free_fs_devices(fs_devices);
fs_devices = ERR_PTR(-EINVAL);
goto out;
}
fs_devices->seed = fs_info->fs_devices->seed;
fs_info->fs_devices->seed = fs_devices;
out:
return fs_devices;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| zheng yan | zheng yan | 143 | 59.83% | 2 | 20.00% |
| miao xie | miao xie | 65 | 27.20% | 1 | 10.00% |
| chris mason | chris mason | 15 | 6.28% | 2 | 20.00% |
| julia lawall | julia lawall | 7 | 2.93% | 1 | 10.00% |
| li zefan | li zefan | 5 | 2.09% | 1 | 10.00% |
| jeff mahoney | jeff mahoney | 3 | 1.26% | 2 | 20.00% |
| christoph hellwig | christoph hellwig | 1 | 0.42% | 1 | 10.00% |
| Total | 239 | 100.00% | 10 | 100.00% |
static int read_one_dev(struct btrfs_fs_info *fs_info,
struct extent_buffer *leaf,
struct btrfs_dev_item *dev_item)
{
struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
struct btrfs_device *device;
u64 devid;
int ret;
u8 fs_uuid[BTRFS_UUID_SIZE];
u8 dev_uuid[BTRFS_UUID_SIZE];
devid = btrfs_device_id(leaf, dev_item);
read_extent_buffer(leaf, dev_uuid, btrfs_device_uuid(dev_item),
BTRFS_UUID_SIZE);
read_extent_buffer(leaf, fs_uuid, btrfs_device_fsid(dev_item),
BTRFS_UUID_SIZE);
if (memcmp(fs_uuid, fs_info->fsid, BTRFS_UUID_SIZE)) {
fs_devices = open_seed_devices(fs_info, fs_uuid);
if (IS_ERR(fs_devices))
return PTR_ERR(fs_devices);
}
device = btrfs_find_device(fs_info, devid, dev_uuid, fs_uuid);
if (!device) {
if (!btrfs_test_opt(fs_info, DEGRADED))
return -EIO;
device = add_missing_dev(fs_devices, devid, dev_uuid);
if (!device)
return -ENOMEM;
btrfs_warn(fs_info, "devid %llu uuid %pU missing",
devid, dev_uuid);
} else {
if (!device->bdev && !btrfs_test_opt(fs_info, DEGRADED))
return -EIO;
if(!device->bdev && !device->missing) {
/*
* this happens when a device that was properly setup
* in the device info lists suddenly goes bad.
* device->bdev is NULL, and so we have to set
* device->missing to one here
*/
device->fs_devices->missing_devices++;
device->missing = 1;
}
/* Move the device to its own fs_devices */
if (device->fs_devices != fs_devices) {
ASSERT(device->missing);
list_move(&device->dev_list, &fs_devices->devices);
device->fs_devices->num_devices--;
fs_devices->num_devices++;
device->fs_devices->missing_devices--;
fs_devices->missing_devices++;
device->fs_devices = fs_devices;
}
}
if (device->fs_devices != fs_info->fs_devices) {
BUG_ON(device->writeable);
if (device->generation !=
btrfs_device_generation(leaf, dev_item))
return -EINVAL;
}
fill_device_from_item(leaf, dev_item, device);
device->in_fs_metadata = 1;
if (device->writeable && !device->is_tgtdev_for_dev_replace) {
device->fs_devices->total_rw_bytes += device->total_bytes;
spin_lock(&fs_info->free_chunk_lock);
fs_info->free_chunk_space += device->total_bytes -
device->bytes_used;
spin_unlock(&fs_info->free_chunk_lock);
}
ret = 0;
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chris mason | chris mason | 153 | 37.14% | 5 | 35.71% |
| zheng yan | zheng yan | 119 | 28.88% | 2 | 14.29% |
| miao xie | miao xie | 88 | 21.36% | 1 | 7.14% |
| josef bacik | josef bacik | 30 | 7.28% | 1 | 7.14% |
| anand jain | anand jain | 11 | 2.67% | 1 | 7.14% |
| stefan behrens | stefan behrens | 6 | 1.46% | 2 | 14.29% |
| jeff mahoney | jeff mahoney | 5 | 1.21% | 2 | 14.29% |
| Total | 412 | 100.00% | 14 | 100.00% |
int btrfs_read_sys_array(struct btrfs_fs_info *fs_info)
{
struct btrfs_root *root = fs_info->tree_root;
struct btrfs_super_block *super_copy = fs_info->super_copy;
struct extent_buffer *sb;
struct btrfs_disk_key *disk_key;
struct btrfs_chunk *chunk;
u8 *array_ptr;
unsigned long sb_array_offset;
int ret = 0;
u32 num_stripes;
u32 array_size;
u32 len = 0;
u32 cur_offset;
u64 type;
struct btrfs_key key;
ASSERT(BTRFS_SUPER_INFO_SIZE <= fs_info->nodesize);
/*
* This will create extent buffer of nodesize, superblock size is
* fixed to BTRFS_SUPER_INFO_SIZE. If nodesize > sb size, this will
* overallocate but we can keep it as-is, only the first page is used.
*/
sb = btrfs_find_create_tree_block(fs_info, BTRFS_SUPER_INFO_OFFSET);
if (IS_ERR(sb))
return PTR_ERR(sb);
set_extent_buffer_uptodate(sb);
btrfs_set_buffer_lockdep_class(root->root_key.objectid, sb, 0);
/*
* The sb extent buffer is artificial and just used to read the system array.
* set_extent_buffer_uptodate() call does not properly mark all it's
* pages up-to-date when the page is larger: extent does not cover the
* whole page and consequently check_page_uptodate does not find all
* the page's extents up-to-date (the hole beyond sb),
* write_extent_buffer then triggers a WARN_ON.
*
* Regular short extents go through mark_extent_buffer_dirty/writeback cycle,
* but sb spans only this function. Add an explicit SetPageUptodate call
* to silence the warning eg. on PowerPC 64.
*/
if (PAGE_SIZE > BTRFS_SUPER_INFO_SIZE)
SetPageUptodate(sb->pages[0]);
write_extent_buffer(sb, super_copy, 0, BTRFS_SUPER_INFO_SIZE);
array_size = btrfs_super_sys_array_size(super_copy);
array_ptr = super_copy->sys_chunk_array;
sb_array_offset = offsetof(struct btrfs_super_block, sys_chunk_array);
cur_offset = 0;
while (cur_offset < array_size) {
disk_key = (struct btrfs_disk_key *)array_ptr;
len = sizeof(*disk_key);
if (cur_offset + len > array_size)
goto out_short_read;
btrfs_disk_key_to_cpu(&key, disk_key);
array_ptr += len;
sb_array_offset += len;
cur_offset += len;
if (key.type == BTRFS_CHUNK_ITEM_KEY) {
chunk = (struct btrfs_chunk *)sb_array_offset;
/*
* At least one btrfs_chunk with one stripe must be
* present, exact stripe count check comes afterwards
*/
len = btrfs_chunk_item_size(1);
if (cur_offset + len > array_size)
goto out_short_read;
num_stripes = btrfs_chunk_num_stripes(sb, chunk);
if (!num_stripes) {
btrfs_err(fs_info,
"invalid number of stripes %u in sys_array at offset %u",
num_stripes, cur_offset);
ret = -EIO;
break;
}
type = btrfs_chunk_type(sb, chunk);
if ((type & BTRFS_BLOCK_GROUP_SYSTEM) == 0) {
btrfs_err(fs_info,
"invalid chunk type %llu in sys_array at offset %u",
type, cur_offset);
ret = -EIO;
break;
}
len = btrfs_chunk_item_size(num_stripes);
if (cur_offset + len > array_size)
goto out_short_read;
ret = read_one_chunk(fs_info, &key, sb, chunk);
if (ret)
break;
} else {
btrfs_err(fs_info,
"unexpected item type %u in sys_array at offset %u",
(u32)key.type, cur_offset);
ret = -EIO;
break;
}
array_ptr += len;
sb_array_offset += len;
cur_offset += len;
}
clear_extent_buffer_uptodate(sb);
free_extent_buffer_stale(sb);
return ret;
out_short_read:
btrfs_err(fs_info, "sys_array too short to read %u bytes at offset %u",
len, cur_offset);
clear_extent_buffer_uptodate(sb);
free_extent_buffer_stale(sb);
return -EIO;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chris mason | chris mason | 226 | 49.02% | 6 | 25.00% |
| david sterba | david sterba | 144 | 31.24% | 7 | 29.17% |
| liu bo | liu bo | 60 | 13.02% | 4 | 16.67% |
| jeff mahoney | jeff mahoney | 28 | 6.07% | 4 | 16.67% |
| kirill a. shutemov | kirill a. shutemov | 1 | 0.22% | 1 | 4.17% |
| nicholas d steeves | nicholas d steeves | 1 | 0.22% | 1 | 4.17% |
| zheng yan | zheng yan | 1 | 0.22% | 1 | 4.17% |
| Total | 461 | 100.00% | 24 | 100.00% |
int btrfs_read_chunk_tree(struct btrfs_fs_info *fs_info)
{
struct btrfs_root *root = fs_info->chunk_root;
struct btrfs_path *path;
struct extent_buffer *leaf;
struct btrfs_key key;
struct btrfs_key found_key;
int ret;
int slot;
u64 total_dev = 0;
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
mutex_lock(&uuid_mutex);
mutex_lock(&fs_info->chunk_mutex);
/*
* Read all device items, and then all the chunk items. All
* device items are found before any chunk item (their object id
* is smaller than the lowest possible object id for a chunk
* item - BTRFS_FIRST_CHUNK_TREE_OBJECTID).
*/
key.objectid = BTRFS_DEV_ITEMS_OBJECTID;
key.offset = 0;
key.type = 0;
ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
if (ret < 0)
goto error;
while (1) {
leaf = path->nodes[0];
slot = path->slots[0];
if (slot >= btrfs_header_nritems(leaf)) {
ret = btrfs_next_leaf(root, path);
if (ret == 0)
continue;
if (ret < 0)
goto error;
break;
}
btrfs_item_key_to_cpu(leaf, &found_key, slot);
if (found_key.type == BTRFS_DEV_ITEM_KEY) {
struct btrfs_dev_item *dev_item;
dev_item = btrfs_item_ptr(leaf, slot,
struct btrfs_dev_item);
ret = read_one_dev(fs_info, leaf, dev_item);
if (ret)
goto error;
total_dev++;
} else if (found_key.type == BTRFS_CHUNK_ITEM_KEY) {
struct btrfs_chunk *chunk;
chunk = btrfs_item_ptr(leaf, slot, struct btrfs_chunk);
ret = read_one_chunk(fs_info, &found_key, leaf, chunk);
if (ret)
goto error;
}
path->slots[0]++;
}
/*
* After loading chunk tree, we've got all device information,
* do another round of validation checks.
*/
if (total_dev != fs_info->fs_devices->total_devices) {
btrfs_err(fs_info,
"super_num_devices %llu mismatch with num_devices %llu found here",
btrfs_super_num_devices(fs_info->super_copy),
total_dev);
ret = -EINVAL;
goto error;
}
if (btrfs_super_total_bytes(fs_info->super_copy) <
fs_info->fs_devices->total_rw_bytes) {
btrfs_err(fs_info,
"super_total_bytes %llu mismatch with fs_devices total_rw_bytes %llu",
btrfs_super_total_bytes(fs_info->super_copy),
fs_info->fs_devices->total_rw_bytes);
ret = -EINVAL;
goto error;
}
ret = 0;
error:
mutex_unlock(&fs_info->chunk_mutex);
mutex_unlock(&uuid_mutex);
btrfs_free_path(path);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chris mason | chris mason | 249 | 61.03% | 1 | 10.00% |
| liu bo | liu bo | 90 | 22.06% | 1 | 10.00% |
| zheng yan | zheng yan | 18 | 4.41% | 1 | 10.00% |
| li zefan | li zefan | 18 | 4.41% | 1 | 10.00% |
| jeff mahoney | jeff mahoney | 15 | 3.68% | 3 | 30.00% |
| zhao lei | zhao lei | 9 | 2.21% | 1 | 10.00% |
| david sterba | david sterba | 8 | 1.96% | 1 | 10.00% |
| filipe david borba manana | filipe david borba manana | 1 | 0.25% | 1 | 10.00% |
| Total | 408 | 100.00% | 10 | 100.00% |
void btrfs_init_devices_late(struct btrfs_fs_info *fs_info)
{
struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
struct btrfs_device *device;
while (fs_devices) {
mutex_lock(&fs_devices->device_list_mutex);
list_for_each_entry(device, &fs_devices->devices, dev_list)
device->fs_info = fs_info;
mutex_unlock(&fs_devices->device_list_mutex);
fs_devices = fs_devices->seed;
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| miao xie | miao xie | 53 | 80.30% | 1 | 33.33% |
| liu bo | liu bo | 12 | 18.18% | 1 | 33.33% |
| jeff mahoney | jeff mahoney | 1 | 1.52% | 1 | 33.33% |
| Total | 66 | 100.00% | 3 | 100.00% |
static void __btrfs_reset_dev_stats(struct btrfs_device *dev)
{
int i;
for (i = 0; i < BTRFS_DEV_STAT_VALUES_MAX; i++)
btrfs_dev_stat_reset(dev, i);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| stefan behrens | stefan behrens | 34 | 100.00% | 2 | 100.00% |
| Total | 34 | 100.00% | 2 | 100.00% |
int btrfs_init_dev_stats(struct btrfs_fs_info *fs_info)
{
struct btrfs_key key;
struct btrfs_key found_key;
struct btrfs_root *dev_root = fs_info->dev_root;
struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
struct extent_buffer *eb;
int slot;
int ret = 0;
struct btrfs_device *device;
struct btrfs_path *path = NULL;
int i;
path = btrfs_alloc_path();
if (!path) {
ret = -ENOMEM;
goto out;
}
mutex_lock(&fs_devices->device_list_mutex);
list_for_each_entry(device, &fs_devices->devices, dev_list) {
int item_size;
struct btrfs_dev_stats_item *ptr;
key.objectid = BTRFS_DEV_STATS_OBJECTID;
key.type = BTRFS_PERSISTENT_ITEM_KEY;
key.offset = device->devid;
ret = btrfs_search_slot(NULL, dev_root, &key, path, 0, 0);
if (ret) {
__btrfs_reset_dev_stats(device);
device->dev_stats_valid = 1;
btrfs_release_path(path);
continue;
}
slot = path->slots[0];
eb = path->nodes[0];
btrfs_item_key_to_cpu(eb, &found_key, slot);
item_size = btrfs_item_size_nr(eb, slot);
ptr = btrfs_item_ptr(eb, slot,
struct btrfs_dev_stats_item);
for (i = 0; i < BTRFS_DEV_STAT_VALUES_MAX; i++) {
if (item_size >= (1 + i) * sizeof(__le64))
btrfs_dev_stat_set(device, i,
btrfs_dev_stats_value(eb, ptr, i));
else
btrfs_dev_stat_reset(device, i);
}
device->dev_stats_valid = 1;
btrfs_dev_stat_print_on_load(device);
btrfs_release_path(path);
}
mutex_unlock(&fs_devices->device_list_mutex);
out:
btrfs_free_path(path);
return ret < 0 ? ret : 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| stefan behrens | stefan behrens | 312 | 99.36% | 3 | 75.00% |
| david sterba | david sterba | 2 | 0.64% | 1 | 25.00% |
| Total | 314 | 100.00% | 4 | 100.00% |
static int update_dev_stat_item(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info,
struct btrfs_device *device)
{
struct btrfs_root *dev_root = fs_info->dev_root;
struct btrfs_path *path;
struct btrfs_key key;
struct extent_buffer *eb;
struct btrfs_dev_stats_item *ptr;
int ret;
int i;
key.objectid = BTRFS_DEV_STATS_OBJECTID;
key.type = BTRFS_PERSISTENT_ITEM_KEY;
key.offset = device->devid;
path = btrfs_alloc_path();
BUG_ON(!path);
ret = btrfs_search_slot(trans, dev_root, &key, path, -1, 1);
if (ret < 0) {
btrfs_warn_in_rcu(fs_info,
"error %d while searching for dev_stats item for device %s",
ret, rcu_str_deref(device->name));
goto out;
}
if (ret == 0 &&
btrfs_item_size_nr(path->nodes[0], path->slots[0]) < sizeof(*ptr)) {
/* need to delete old one and insert a new one */
ret = btrfs_del_item(trans, dev_root, path);
if (ret != 0) {
btrfs_warn_in_rcu(fs_info,
"delete too small dev_stats item for device %s failed %d",
rcu_str_deref(device->name), ret);
goto out;
}
ret = 1;
}
if (ret == 1) {
/* need to insert a new item */
btrfs_release_path(path);
ret = btrfs_insert_empty_item(trans, dev_root, path,
&key, sizeof(*ptr));
if (ret < 0) {
btrfs_warn_in_rcu(fs_info,
"insert dev_stats item for device %s failed %d",
rcu_str_deref(device->name), ret);
goto out;
}
}
eb = path->nodes[0];
ptr = btrfs_item_ptr(eb, path->slots[0], struct btrfs_dev_stats_item);
for (i = 0; i < BTRFS_DEV_STAT_VALUES_MAX; i++)
btrfs_set_dev_stats_value(eb, ptr, i,
btrfs_dev_stat_read(device, i));
btrfs_mark_buffer_dirty(eb);
out:
btrfs_free_path(path);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| stefan behrens | stefan behrens | 303 | 89.91% | 1 | 20.00% |
| david sterba | david sterba | 14 | 4.15% | 2 | 40.00% |
| jeff mahoney | jeff mahoney | 11 | 3.26% | 1 | 20.00% |
| josef bacik | josef bacik | 9 | 2.67% | 1 | 20.00% |
| Total | 337 | 100.00% | 5 | 100.00% |
/*
* called from commit_transaction. Writes all changed device stats to disk.
*/
int btrfs_run_dev_stats(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info)
{
struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
struct btrfs_device *device;
int stats_cnt;
int ret = 0;
mutex_lock(&fs_devices->device_list_mutex);
list_for_each_entry(device, &fs_devices->devices, dev_list) {
if (!device->dev_stats_valid || !btrfs_dev_stats_dirty(device))
continue;
stats_cnt = atomic_read(&device->dev_stats_ccnt);
ret = update_dev_stat_item(trans, fs_info, device);
if (!ret)
atomic_sub(stats_cnt, &device->dev_stats_ccnt);
}
mutex_unlock(&fs_devices->device_list_mutex);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| stefan behrens | stefan behrens | 92 | 79.31% | 1 | 33.33% |
| miao xie | miao xie | 23 | 19.83% | 1 | 33.33% |
| jeff mahoney | jeff mahoney | 1 | 0.86% | 1 | 33.33% |
| Total | 116 | 100.00% | 3 | 100.00% |
void btrfs_dev_stat_inc_and_print(struct btrfs_device *dev, int index)
{
btrfs_dev_stat_inc(dev, index);
btrfs_dev_stat_print_on_error(dev);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| stefan behrens | stefan behrens | 25 | 100.00% | 1 | 100.00% |
| Total | 25 | 100.00% | 1 | 100.00% |
static void btrfs_dev_stat_print_on_error(struct btrfs_device *dev)
{
if (!dev->dev_stats_valid)
return;
btrfs_err_rl_in_rcu(dev->fs_info,
"bdev %s errs: wr %u, rd %u, flush %u, corrupt %u, gen %u",
rcu_str_deref(dev->name),
btrfs_dev_stat_read(dev, BTRFS_DEV_STAT_WRITE_ERRS),
btrfs_dev_stat_read(dev, BTRFS_DEV_STAT_READ_ERRS),
btrfs_dev_stat_read(dev, BTRFS_DEV_STAT_FLUSH_ERRS),
btrfs_dev_stat_read(dev, BTRFS_DEV_STAT_CORRUPTION_ERRS),
btrfs_dev_stat_read(dev, BTRFS_DEV_STAT_GENERATION_ERRS));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| stefan behrens | stefan behrens | 60 | 85.71% | 1 | 25.00% |
| david sterba | david sterba | 6 | 8.57% | 1 | 25.00% |
| josef bacik | josef bacik | 3 | 4.29% | 1 | 25.00% |
| eric sandeen | eric sandeen | 1 | 1.43% | 1 | 25.00% |
| Total | 70 | 100.00% | 4 | 100.00% |
static void btrfs_dev_stat_print_on_load(struct btrfs_device *dev)
{
int i;
for (i = 0; i < BTRFS_DEV_STAT_VALUES_MAX; i++)
if (btrfs_dev_stat_read(dev, i) != 0)
break;
if (i == BTRFS_DEV_STAT_VALUES_MAX)
return; /* all values == 0, suppress message */
btrfs_info_in_rcu(dev->fs_info,
"bdev %s errs: wr %u, rd %u, flush %u, corrupt %u, gen %u",
rcu_str_deref(dev->name),
btrfs_dev_stat_read(dev, BTRFS_DEV_STAT_WRITE_ERRS),
btrfs_dev_stat_read(dev, BTRFS_DEV_STAT_READ_ERRS),
btrfs_dev_stat_read(dev, BTRFS_DEV_STAT_FLUSH_ERRS),
btrfs_dev_stat_read(dev, BTRFS_DEV_STAT_CORRUPTION_ERRS),
btrfs_dev_stat_read(dev, BTRFS_DEV_STAT_GENERATION_ERRS));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| stefan behrens | stefan behrens | 89 | 90.82% | 2 | 50.00% |
| david sterba | david sterba | 6 | 6.12% | 1 | 25.00% |
| josef bacik | josef bacik | 3 | 3.06% | 1 | 25.00% |
| Total | 98 | 100.00% | 4 | 100.00% |
int btrfs_get_dev_stats(struct btrfs_fs_info *fs_info,
struct btrfs_ioctl_get_dev_stats *stats)
{
struct btrfs_device *dev;
struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
int i;
mutex_lock(&fs_devices->device_list_mutex);
dev = btrfs_find_device(fs_info, stats->devid, NULL, NULL);
mutex_unlock(&fs_devices->device_list_mutex);
if (!dev) {
btrfs_warn(fs_info, "get dev_stats failed, device not found");
return -ENODEV;
} else if (!dev->dev_stats_valid) {
btrfs_warn(fs_info, "get dev_stats failed, not yet valid");
return -ENODEV;
} else if (stats->flags & BTRFS_DEV_STATS_RESET) {
for (i = 0; i < BTRFS_DEV_STAT_VALUES_MAX; i++) {
if (stats->nr_items > i)
stats->values[i] =
btrfs_dev_stat_read_and_reset(dev, i);
else
btrfs_dev_stat_reset(dev, i);
}
} else {
for (i = 0; i < BTRFS_DEV_STAT_VALUES_MAX; i++)
if (stats->nr_items > i)
stats->values[i] = btrfs_dev_stat_read(dev, i);
}
if (stats->nr_items > BTRFS_DEV_STAT_VALUES_MAX)
stats->nr_items = BTRFS_DEV_STAT_VALUES_MAX;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| stefan behrens | stefan behrens | 198 | 92.96% | 3 | 50.00% |
| frank holton | frank holton | 8 | 3.76% | 1 | 16.67% |
| david sterba | david sterba | 5 | 2.35% | 1 | 16.67% |
| jeff mahoney | jeff mahoney | 2 | 0.94% | 1 | 16.67% |
| Total | 213 | 100.00% | 6 | 100.00% |
void btrfs_scratch_superblocks(struct block_device *bdev, char *device_path)
{
struct buffer_head *bh;
struct btrfs_super_block *disk_super;
int copy_num;
if (!bdev)
return;
for (copy_num = 0; copy_num < BTRFS_SUPER_MIRROR_MAX;
copy_num++) {
if (btrfs_read_dev_one_super(bdev, copy_num, &bh))
continue;
disk_super = (struct btrfs_super_block *)bh->b_data;
memset(&disk_super->magic, 0, sizeof(disk_super->magic));
set_buffer_dirty(bh);
sync_dirty_buffer(bh);
brelse(bh);
}
/* Notify udev that device has changed */
btrfs_kobject_uevent(bdev, KOBJ_CHANGE);
/* Update ctime/mtime for device path for libblkid */
update_dev_time(device_path);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| stefan behrens | stefan behrens | 67 | 56.78% | 1 | 33.33% |
| anand jain | anand jain | 51 | 43.22% | 2 | 66.67% |
| Total | 118 | 100.00% | 3 | 100.00% |
/*
* Update the size of all devices, which is used for writing out the
* super blocks.
*/
void btrfs_update_commit_device_size(struct btrfs_fs_info *fs_info)
{
struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
struct btrfs_device *curr, *next;
if (list_empty(&fs_devices->resized_devices))
return;
mutex_lock(&fs_devices->device_list_mutex);
mutex_lock(&fs_info->chunk_mutex);
list_for_each_entry_safe(curr, next, &fs_devices->resized_devices,
resized_list) {
list_del_init(&curr->resized_list);
curr->commit_total_bytes = curr->disk_total_bytes;
}
mutex_unlock(&fs_info->chunk_mutex);
mutex_unlock(&fs_devices->device_list_mutex);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| miao xie | miao xie | 92 | 93.88% | 1 | 50.00% |
| david sterba | david sterba | 6 | 6.12% | 1 | 50.00% |
| Total | 98 | 100.00% | 2 | 100.00% |
/* Must be invoked during the transaction commit */
void btrfs_update_commit_device_bytes_used(struct btrfs_fs_info *fs_info,
struct btrfs_transaction *transaction)
{
struct extent_map *em;
struct map_lookup *map;
struct btrfs_device *dev;
int i;
if (list_empty(&transaction->pending_chunks))
return;
/* In order to kick the device replace finish process */
mutex_lock(&fs_info->chunk_mutex);
list_for_each_entry(em, &transaction->pending_chunks, list) {
map = em->map_lookup;
for (i = 0; i < map->num_stripes; i++) {
dev = map->stripes[i].dev;
dev->commit_bytes_used = dev->bytes_used;
}
}
mutex_unlock(&fs_info->chunk_mutex);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| miao xie | miao xie | 100 | 88.50% | 1 | 20.00% |
| david sterba | david sterba | 8 | 7.08% | 1 | 20.00% |
| jeff mahoney | jeff mahoney | 5 | 4.42% | 3 | 60.00% |
| Total | 113 | 100.00% | 5 | 100.00% |
void btrfs_set_fs_info_ptr(struct btrfs_fs_info *fs_info)
{
struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
while (fs_devices) {
fs_devices->fs_info = fs_info;
fs_devices = fs_devices->seed;
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| anand jain | anand jain | 37 | 100.00% | 1 | 100.00% |
| Total | 37 | 100.00% | 1 | 100.00% |
void btrfs_reset_fs_info_ptr(struct btrfs_fs_info *fs_info)
{
struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
while (fs_devices) {
fs_devices->fs_info = NULL;
fs_devices = fs_devices->seed;
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| anand jain | anand jain | 37 | 100.00% | 1 | 100.00% |
| Total | 37 | 100.00% | 1 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chris mason | chris mason | 6848 | 21.04% | 88 | 18.76% |
| stefan behrens | stefan behrens | 5297 | 16.28% | 24 | 5.12% |
| zheng yan | zheng yan | 3888 | 11.95% | 7 | 1.49% |
| ilya dryomov | ilya dryomov | 3877 | 11.91% | 38 | 8.10% |
| miao xie | miao xie | 1811 | 5.57% | 36 | 7.68% |
| josef bacik | josef bacik | 1548 | 4.76% | 23 | 4.90% |
| anand jain | anand jain | 1384 | 4.25% | 46 | 9.81% |
| david woodhouse | david woodhouse | 1167 | 3.59% | 1 | 0.21% |
| david sterba | david sterba | 1161 | 3.57% | 39 | 8.32% |
| zhao lei | zhao lei | 1139 | 3.50% | 18 | 3.84% |
| liu bo | liu bo | 751 | 2.31% | 18 | 3.84% |
| jeff mahoney | jeff mahoney | 685 | 2.11% | 17 | 3.62% |
| filipe david borba manana | filipe david borba manana | 580 | 1.78% | 18 | 3.84% |
| arne jansen | arne jansen | 402 | 1.24% | 2 | 0.43% |
| li dongyang | li dongyang | 334 | 1.03% | 1 | 0.21% |
| qu wenruo | qu wenruo | 252 | 0.77% | 6 | 1.28% |
| xiao guangrong | xiao guangrong | 149 | 0.46% | 6 | 1.28% |
| michael christie | michael christie | 127 | 0.39% | 4 | 0.85% |
| li zefan | li zefan | 113 | 0.35% | 4 | 0.85% |
| gabriel arthur petursson | gabriel arthur petursson | 76 | 0.23% | 1 | 0.21% |
| christoph hellwig | christoph hellwig | 75 | 0.23% | 7 | 1.49% |
| frank holton | frank holton | 72 | 0.22% | 1 | 0.21% |
| jan schmidt | jan schmidt | 68 | 0.21% | 3 | 0.64% |
| lukas czerner | lukas czerner | 68 | 0.21% | 1 | 0.21% |
| tsutomu itoh | tsutomu itoh | 62 | 0.19% | 4 | 0.85% |
| chris ball | chris ball | 59 | 0.18% | 1 | 0.21% |
| alexandru moise | alexandru moise | 57 | 0.18% | 1 | 0.21% |
| eric sandeen | eric sandeen | 49 | 0.15% | 5 | 1.07% |
| gui hecheng | gui hecheng | 47 | 0.14% | 1 | 0.21% |
| mark fasheh | mark fasheh | 42 | 0.13% | 5 | 1.07% |
| taruisi hiroaki | taruisi hiroaki | 42 | 0.13% | 1 | 0.21% |
| sam tygier | sam tygier | 40 | 0.12% | 1 | 0.21% |
| forrest liu | forrest liu | 36 | 0.11% | 1 | 0.21% |
| qinghuang feng | qinghuang feng | 27 | 0.08% | 1 | 0.21% |
| wang shilong | wang shilong | 25 | 0.08% | 1 | 0.21% |
| andreas philipp | andreas philipp | 18 | 0.06% | 1 | 0.21% |
| julia lawall | julia lawall | 17 | 0.05% | 3 | 0.64% |
| mike snitzer | mike snitzer | 12 | 0.04% | 1 | 0.21% |
| tejun heo | tejun heo | 11 | 0.03% | 4 | 0.85% |
| carey underwood | carey underwood | 11 | 0.03% | 1 | 0.21% |
| byongho lee | byongho lee | 10 | 0.03% | 1 | 0.21% |
| kent overstreet | kent overstreet | 8 | 0.02% | 1 | 0.21% |
| simon kirby | simon kirby | 8 | 0.02% | 1 | 0.21% |
| ben hutchings | ben hutchings | 8 | 0.02% | 1 | 0.21% |
| yanhai zhu | yanhai zhu | 7 | 0.02% | 1 | 0.21% |
| sasha levin | sasha levin | 6 | 0.02% | 1 | 0.21% |
| rickard strandqvist | rickard strandqvist | 6 | 0.02% | 1 | 0.21% |
| dulshani gunawardhana | dulshani gunawardhana | 6 | 0.02% | 1 | 0.21% |
| kirill a. shutemov | kirill a. shutemov | 6 | 0.02% | 1 | 0.21% |
| sebastian andrzej siewior | sebastian andrzej siewior | 5 | 0.02% | 1 | 0.21% |
| naohiro aota | naohiro aota | 5 | 0.02% | 1 | 0.21% |
| nicholas d steeves | nicholas d steeves | 4 | 0.01% | 1 | 0.21% |
| jens axboe | jens axboe | 4 | 0.01% | 2 | 0.43% |
| fabian frederick | fabian frederick | 4 | 0.01% | 1 | 0.21% |
| himangi saraogi | himangi saraogi | 4 | 0.01% | 1 | 0.21% |
| andy shevchenko | andy shevchenko | 3 | 0.01% | 1 | 0.21% |
| al viro | al viro | 3 | 0.01% | 1 | 0.21% |
| adam buchbinder | adam buchbinder | 2 | 0.01% | 1 | 0.21% |
| vincent stehle | vincent stehle | 2 | 0.01% | 1 | 0.21% |
| holger hoffstatte | holger hoffstatte | 2 | 0.01% | 1 | 0.21% |
| mel gorman | mel gorman | 2 | 0.01% | 1 | 0.21% |
| zach brown | zach brown | 2 | 0.01% | 1 | 0.21% |
| michal hocko | michal hocko | 2 | 0.01% | 1 | 0.21% |
| chandan rajendra | chandan rajendra | 2 | 0.01% | 1 | 0.21% |
| austin s. hemmelgarn | austin s. hemmelgarn | 1 | 0.00% | 1 | 0.21% |
| miguel filipe | miguel filipe | 1 | 0.00% | 1 | 0.21% |
| sachin kamat | sachin kamat | 1 | 0.00% | 1 | 0.21% |
| Total | 32541 | 100.00% | 469 | 100.00% |
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