Release 4.11 fs/btrfs/disk-io.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/fs.h>
#include <linux/blkdev.h>
#include <linux/scatterlist.h>
#include <linux/swap.h>
#include <linux/radix-tree.h>
#include <linux/writeback.h>
#include <linux/buffer_head.h>
#include <linux/workqueue.h>
#include <linux/kthread.h>
#include <linux/slab.h>
#include <linux/migrate.h>
#include <linux/ratelimit.h>
#include <linux/uuid.h>
#include <linux/semaphore.h>
#include <asm/unaligned.h>
#include "ctree.h"
#include "disk-io.h"
#include "hash.h"
#include "transaction.h"
#include "btrfs_inode.h"
#include "volumes.h"
#include "print-tree.h"
#include "locking.h"
#include "tree-log.h"
#include "free-space-cache.h"
#include "free-space-tree.h"
#include "inode-map.h"
#include "check-integrity.h"
#include "rcu-string.h"
#include "dev-replace.h"
#include "raid56.h"
#include "sysfs.h"
#include "qgroup.h"
#include "compression.h"
#ifdef CONFIG_X86
#include <asm/cpufeature.h>
#endif
#define BTRFS_SUPER_FLAG_SUPP (BTRFS_HEADER_FLAG_WRITTEN |\
BTRFS_HEADER_FLAG_RELOC |\
BTRFS_SUPER_FLAG_ERROR |\
BTRFS_SUPER_FLAG_SEEDING |\
BTRFS_SUPER_FLAG_METADUMP)
static const struct extent_io_ops btree_extent_io_ops;
static void end_workqueue_fn(struct btrfs_work *work);
static void free_fs_root(struct btrfs_root *root);
static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info);
static void btrfs_destroy_ordered_extents(struct btrfs_root *root);
static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
struct btrfs_fs_info *fs_info);
static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root);
static int btrfs_destroy_marked_extents(struct btrfs_fs_info *fs_info,
struct extent_io_tree *dirty_pages,
int mark);
static int btrfs_destroy_pinned_extent(struct btrfs_fs_info *fs_info,
struct extent_io_tree *pinned_extents);
static int btrfs_cleanup_transaction(struct btrfs_fs_info *fs_info);
static void btrfs_error_commit_super(struct btrfs_fs_info *fs_info);
/*
* btrfs_end_io_wq structs are used to do processing in task context when an IO
* is complete. This is used during reads to verify checksums, and it is used
* by writes to insert metadata for new file extents after IO is complete.
*/
struct btrfs_end_io_wq {
struct bio *bio;
bio_end_io_t *end_io;
void *private;
struct btrfs_fs_info *info;
int error;
enum btrfs_wq_endio_type metadata;
struct list_head list;
struct btrfs_work work;
};
static struct kmem_cache *btrfs_end_io_wq_cache;
int __init btrfs_end_io_wq_init(void)
{
btrfs_end_io_wq_cache = kmem_cache_create("btrfs_end_io_wq",
sizeof(struct btrfs_end_io_wq),
0,
SLAB_MEM_SPREAD,
NULL);
if (!btrfs_end_io_wq_cache)
return -ENOMEM;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Sterba | 39 | 100.00% | 1 | 100.00% |
| Total | 39 | 100.00% | 1 | 100.00% |
void btrfs_end_io_wq_exit(void)
{
kmem_cache_destroy(btrfs_end_io_wq_cache);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Sterba | 12 | 100.00% | 1 | 100.00% |
| Total | 12 | 100.00% | 1 | 100.00% |
/*
* async submit bios are used to offload expensive checksumming
* onto the worker threads. They checksum file and metadata bios
* just before they are sent down the IO stack.
*/
struct async_submit_bio {
struct inode *inode;
struct bio *bio;
struct list_head list;
extent_submit_bio_hook_t *submit_bio_start;
extent_submit_bio_hook_t *submit_bio_done;
int mirror_num;
unsigned long bio_flags;
/*
* bio_offset is optional, can be used if the pages in the bio
* can't tell us where in the file the bio should go
*/
u64 bio_offset;
struct btrfs_work work;
int error;
};
/*
* Lockdep class keys for extent_buffer->lock's in this root. For a given
* eb, the lockdep key is determined by the btrfs_root it belongs to and
* the level the eb occupies in the tree.
*
* Different roots are used for different purposes and may nest inside each
* other and they require separate keysets. As lockdep keys should be
* static, assign keysets according to the purpose of the root as indicated
* by btrfs_root->objectid. This ensures that all special purpose roots
* have separate keysets.
*
* Lock-nesting across peer nodes is always done with the immediate parent
* node locked thus preventing deadlock. As lockdep doesn't know this, use
* subclass to avoid triggering lockdep warning in such cases.
*
* The key is set by the readpage_end_io_hook after the buffer has passed
* csum validation but before the pages are unlocked. It is also set by
* btrfs_init_new_buffer on freshly allocated blocks.
*
* We also add a check to make sure the highest level of the tree is the
* same as our lockdep setup here. If BTRFS_MAX_LEVEL changes, this code
* needs update as well.
*/
#ifdef CONFIG_DEBUG_LOCK_ALLOC
# if BTRFS_MAX_LEVEL != 8
# error
# endif
static struct btrfs_lockdep_keyset {
u64 id; /* root objectid */
const char *name_stem; /* lock name stem */
char names[BTRFS_MAX_LEVEL + 1][20];
struct lock_class_key keys[BTRFS_MAX_LEVEL + 1];
}
btrfs_lockdep_keysets[] = {
{ .id = BTRFS_ROOT_TREE_OBJECTID, .name_stem = "root" },
{ .id = BTRFS_EXTENT_TREE_OBJECTID, .name_stem = "extent" },
{ .id = BTRFS_CHUNK_TREE_OBJECTID, .name_stem = "chunk" },
{ .id = BTRFS_DEV_TREE_OBJECTID, .name_stem = "dev" },
{ .id = BTRFS_FS_TREE_OBJECTID, .name_stem = "fs" },
{ .id = BTRFS_CSUM_TREE_OBJECTID, .name_stem = "csum" },
{ .id = BTRFS_QUOTA_TREE_OBJECTID, .name_stem = "quota" },
{ .id = BTRFS_TREE_LOG_OBJECTID, .name_stem = "log" },
{ .id = BTRFS_TREE_RELOC_OBJECTID, .name_stem = "treloc" },
{ .id = BTRFS_DATA_RELOC_TREE_OBJECTID, .name_stem = "dreloc" },
{ .id = BTRFS_UUID_TREE_OBJECTID, .name_stem = "uuid" },
{ .id = BTRFS_FREE_SPACE_TREE_OBJECTID, .name_stem = "free-space" },
{ .id = 0, .name_stem = "tree" },
};
void __init btrfs_init_lockdep(void)
{
int i, j;
/* initialize lockdep class names */
for (i = 0; i < ARRAY_SIZE(btrfs_lockdep_keysets); i++) {
struct btrfs_lockdep_keyset *ks = &btrfs_lockdep_keysets[i];
for (j = 0; j < ARRAY_SIZE(ks->names); j++)
snprintf(ks->names[j], sizeof(ks->names[j]),
"btrfs-%s-%02d", ks->name_stem, j);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 89 | 100.00% | 2 | 100.00% |
| Total | 89 | 100.00% | 2 | 100.00% |
void btrfs_set_buffer_lockdep_class(u64 objectid, struct extent_buffer *eb,
int level)
{
struct btrfs_lockdep_keyset *ks;
BUG_ON(level >= ARRAY_SIZE(ks->keys));
/* find the matching keyset, id 0 is the default entry */
for (ks = btrfs_lockdep_keysets; ks->id; ks++)
if (ks->id == objectid)
break;
lockdep_set_class_and_name(&eb->lock,
&ks->keys[level], ks->names[level]);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 79 | 100.00% | 1 | 100.00% |
| Total | 79 | 100.00% | 1 | 100.00% |
#endif
/*
* extents on the btree inode are pretty simple, there's one extent
* that covers the entire device
*/
static struct extent_map *btree_get_extent(struct btrfs_inode *inode,
struct page *page, size_t pg_offset, u64 start, u64 len,
int create)
{
struct btrfs_fs_info *fs_info = btrfs_sb(inode->vfs_inode.i_sb);
struct extent_map_tree *em_tree = &inode->extent_tree;
struct extent_map *em;
int ret;
read_lock(&em_tree->lock);
em = lookup_extent_mapping(em_tree, start, len);
if (em) {
em->bdev = fs_info->fs_devices->latest_bdev;
read_unlock(&em_tree->lock);
goto out;
}
read_unlock(&em_tree->lock);
em = alloc_extent_map();
if (!em) {
em = ERR_PTR(-ENOMEM);
goto out;
}
em->start = 0;
em->len = (u64)-1;
em->block_len = (u64)-1;
em->block_start = 0;
em->bdev = fs_info->fs_devices->latest_bdev;
write_lock(&em_tree->lock);
ret = add_extent_mapping(em_tree, em, 0);
if (ret == -EEXIST) {
free_extent_map(em);
em = lookup_extent_mapping(em_tree, start, len);
if (!em)
em = ERR_PTR(-EIO);
} else if (ret) {
free_extent_map(em);
em = ERR_PTR(ret);
}
write_unlock(&em_tree->lock);
out:
return em;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 241 | 89.26% | 11 | 61.11% |
| Jeff Mahoney | 12 | 4.44% | 1 | 5.56% |
| Tsutomu Itoh | 9 | 3.33% | 1 | 5.56% |
| Nikolay Borisov | 3 | 1.11% | 1 | 5.56% |
| Josef Bacik | 2 | 0.74% | 1 | 5.56% |
| David Sterba | 2 | 0.74% | 2 | 11.11% |
| Christoph Hellwig | 1 | 0.37% | 1 | 5.56% |
| Total | 270 | 100.00% | 18 | 100.00% |
u32 btrfs_csum_data(const char *data, u32 seed, size_t len)
{
return btrfs_crc32c(seed, data, len);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 24 | 92.31% | 1 | 33.33% |
| Filipe David Borba Manana | 1 | 3.85% | 1 | 33.33% |
| David Sterba | 1 | 3.85% | 1 | 33.33% |
| Total | 26 | 100.00% | 3 | 100.00% |
void btrfs_csum_final(u32 crc, u8 *result)
{
put_unaligned_le32(~crc, result);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 15 | 75.00% | 1 | 33.33% |
| David Sterba | 4 | 20.00% | 1 | 33.33% |
| Domagoj Tršan | 1 | 5.00% | 1 | 33.33% |
| Total | 20 | 100.00% | 3 | 100.00% |
/*
* compute the csum for a btree block, and either verify it or write it
* into the csum field of the block.
*/
static int csum_tree_block(struct btrfs_fs_info *fs_info,
struct extent_buffer *buf,
int verify)
{
u16 csum_size = btrfs_super_csum_size(fs_info->super_copy);
char *result = NULL;
unsigned long len;
unsigned long cur_len;
unsigned long offset = BTRFS_CSUM_SIZE;
char *kaddr;
unsigned long map_start;
unsigned long map_len;
int err;
u32 crc = ~(u32)0;
unsigned long inline_result;
len = buf->len - offset;
while (len > 0) {
err = map_private_extent_buffer(buf, offset, 32,
&kaddr, &map_start, &map_len);
if (err)
return err;
cur_len = min(len, map_len - (offset - map_start));
crc = btrfs_csum_data(kaddr + offset - map_start,
crc, cur_len);
len -= cur_len;
offset += cur_len;
}
if (csum_size > sizeof(inline_result)) {
result = kzalloc(csum_size, GFP_NOFS);
if (!result)
return -ENOMEM;
} else {
result = (char *)&inline_result;
}
btrfs_csum_final(crc, result);
if (verify) {
if (memcmp_extent_buffer(buf, result, 0, csum_size)) {
u32 val;
u32 found = 0;
memcpy(&found, result, csum_size);
read_extent_buffer(buf, &val, 0, csum_size);
btrfs_warn_rl(fs_info,
"%s checksum verify failed on %llu wanted %X found %X level %d",
fs_info->sb->s_id, buf->start,
val, found, btrfs_header_level(buf));
if (result != (char *)&inline_result)
kfree(result);
return -EUCLEAN;
}
} else {
write_extent_buffer(buf, result, 0, csum_size);
}
if (result != (char *)&inline_result)
kfree(result);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 233 | 69.35% | 3 | 37.50% |
| Josef Bacik | 92 | 27.38% | 1 | 12.50% |
| Alexander Lyakas | 5 | 1.49% | 1 | 12.50% |
| David Sterba | 3 | 0.89% | 1 | 12.50% |
| Daniel Dressler | 2 | 0.60% | 1 | 12.50% |
| Jeff Mahoney | 1 | 0.30% | 1 | 12.50% |
| Total | 336 | 100.00% | 8 | 100.00% |
/*
* we can't consider a given block up to date unless the transid of the
* block matches the transid in the parent node's pointer. This is how we
* detect blocks that either didn't get written at all or got written
* in the wrong place.
*/
static int verify_parent_transid(struct extent_io_tree *io_tree,
struct extent_buffer *eb, u64 parent_transid,
int atomic)
{
struct extent_state *cached_state = NULL;
int ret;
bool need_lock = (current->journal_info == BTRFS_SEND_TRANS_STUB);
if (!parent_transid || btrfs_header_generation(eb) == parent_transid)
return 0;
if (atomic)
return -EAGAIN;
if (need_lock) {
btrfs_tree_read_lock(eb);
btrfs_set_lock_blocking_rw(eb, BTRFS_READ_LOCK);
}
lock_extent_bits(io_tree, eb->start, eb->start + eb->len - 1,
&cached_state);
if (extent_buffer_uptodate(eb) &&
btrfs_header_generation(eb) == parent_transid) {
ret = 0;
goto out;
}
btrfs_err_rl(eb->fs_info,
"parent transid verify failed on %llu wanted %llu found %llu",
eb->start,
parent_transid, btrfs_header_generation(eb));
ret = 1;
/*
* Things reading via commit roots that don't have normal protection,
* like send, can have a really old block in cache that may point at a
* block that has been freed and re-allocated. So don't clear uptodate
* if we find an eb that is under IO (dirty/writeback) because we could
* end up reading in the stale data and then writing it back out and
* making everybody very sad.
*/
if (!extent_buffer_under_io(eb))
clear_extent_buffer_uptodate(eb);
out:
unlock_extent_cached(io_tree, eb->start, eb->start + eb->len - 1,
&cached_state, GFP_NOFS);
if (need_lock)
btrfs_tree_read_unlock_blocking(eb);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 138 | 67.32% | 3 | 33.33% |
| Josef Bacik | 60 | 29.27% | 3 | 33.33% |
| David Sterba | 3 | 1.46% | 1 | 11.11% |
| Shilong Wang | 3 | 1.46% | 1 | 11.11% |
| Nicholas D Steeves | 1 | 0.49% | 1 | 11.11% |
| Total | 205 | 100.00% | 9 | 100.00% |
/*
* Return 0 if the superblock checksum type matches the checksum value of that
* algorithm. Pass the raw disk superblock data.
*/
static int btrfs_check_super_csum(struct btrfs_fs_info *fs_info,
char *raw_disk_sb)
{
struct btrfs_super_block *disk_sb =
(struct btrfs_super_block *)raw_disk_sb;
u16 csum_type = btrfs_super_csum_type(disk_sb);
int ret = 0;
if (csum_type == BTRFS_CSUM_TYPE_CRC32) {
u32 crc = ~(u32)0;
const int csum_size = sizeof(crc);
char result[csum_size];
/*
* The super_block structure does not span the whole
* BTRFS_SUPER_INFO_SIZE range, we expect that the unused space
* is filled with zeros and is included in the checksum.
*/
crc = btrfs_csum_data(raw_disk_sb + BTRFS_CSUM_SIZE,
crc, BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE);
btrfs_csum_final(crc, result);
if (memcmp(raw_disk_sb, result, csum_size))
ret = 1;
}
if (csum_type >= ARRAY_SIZE(btrfs_csum_sizes)) {
btrfs_err(fs_info, "unsupported checksum algorithm %u",
csum_type);
ret = 1;
}
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Sterba | 127 | 92.70% | 1 | 33.33% |
| Jeff Mahoney | 9 | 6.57% | 1 | 33.33% |
| Nicholas D Steeves | 1 | 0.73% | 1 | 33.33% |
| Total | 137 | 100.00% | 3 | 100.00% |
/*
* helper to read a given tree block, doing retries as required when
* the checksums don't match and we have alternate mirrors to try.
*/
static int btree_read_extent_buffer_pages(struct btrfs_fs_info *fs_info,
struct extent_buffer *eb,
u64 parent_transid)
{
struct extent_io_tree *io_tree;
int failed = 0;
int ret;
int num_copies = 0;
int mirror_num = 0;
int failed_mirror = 0;
clear_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags);
io_tree = &BTRFS_I(fs_info->btree_inode)->io_tree;
while (1) {
ret = read_extent_buffer_pages(io_tree, eb, WAIT_COMPLETE,
btree_get_extent, mirror_num);
if (!ret) {
if (!verify_parent_transid(io_tree, eb,
parent_transid, 0))
break;
else
ret = -EIO;
}
/*
* This buffer's crc is fine, but its contents are corrupted, so
* there is no reason to read the other copies, they won't be
* any less wrong.
*/
if (test_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags))
break;
num_copies = btrfs_num_copies(fs_info,
eb->start, eb->len);
if (num_copies == 1)
break;
if (!failed_mirror) {
failed = 1;
failed_mirror = eb->read_mirror;
}
mirror_num++;
if (mirror_num == failed_mirror)
mirror_num++;
if (mirror_num > num_copies)
break;
}
if (failed && !ret && failed_mirror)
repair_eb_io_failure(fs_info, eb, failed_mirror);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 115 | 54.50% | 4 | 36.36% |
| Josef Bacik | 79 | 37.44% | 3 | 27.27% |
| Stefan Behrens | 13 | 6.16% | 2 | 18.18% |
| Jeff Mahoney | 3 | 1.42% | 1 | 9.09% |
| Arne Jansen | 1 | 0.47% | 1 | 9.09% |
| Total | 211 | 100.00% | 11 | 100.00% |
/*
* checksum a dirty tree block before IO. This has extra checks to make sure
* we only fill in the checksum field in the first page of a multi-page block
*/
static int csum_dirty_buffer(struct btrfs_fs_info *fs_info, struct page *page)
{
u64 start = page_offset(page);
u64 found_start;
struct extent_buffer *eb;
eb = (struct extent_buffer *)page->private;
if (page != eb->pages[0])
return 0;
found_start = btrfs_header_bytenr(eb);
/*
* Please do not consolidate these warnings into a single if.
* It is useful to know what went wrong.
*/
if (WARN_ON(found_start != start))
return -EUCLEAN;
if (WARN_ON(!PageUptodate(page)))
return -EUCLEAN;
ASSERT(memcmp_extent_buffer(eb, fs_info->fsid,
btrfs_header_fsid(), BTRFS_FSID_SIZE) == 0);
return csum_tree_block(fs_info, eb, 0);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 68 | 55.74% | 4 | 40.00% |
| Alexander Lyakas | 25 | 20.49% | 1 | 10.00% |
| Josef Bacik | 18 | 14.75% | 1 | 10.00% |
| Daniel Dressler | 4 | 3.28% | 1 | 10.00% |
| Dulshani Gunawardhana | 3 | 2.46% | 1 | 10.00% |
| Miao Xie | 3 | 2.46% | 1 | 10.00% |
| Christoph Hellwig | 1 | 0.82% | 1 | 10.00% |
| Total | 122 | 100.00% | 10 | 100.00% |
static int check_tree_block_fsid(struct btrfs_fs_info *fs_info,
struct extent_buffer *eb)
{
struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
u8 fsid[BTRFS_UUID_SIZE];
int ret = 1;
read_extent_buffer(eb, fsid, btrfs_header_fsid(), BTRFS_FSID_SIZE);
while (fs_devices) {
if (!memcmp(fsid, fs_devices->fsid, BTRFS_FSID_SIZE)) {
ret = 0;
break;
}
fs_devices = fs_devices->seed;
}
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Zheng Yan | 81 | 96.43% | 1 | 33.33% |
| Daniel Dressler | 2 | 2.38% | 1 | 33.33% |
| Ross Kirk | 1 | 1.19% | 1 | 33.33% |
| Total | 84 | 100.00% | 3 | 100.00% |
#define CORRUPT(reason, eb, root, slot) \
btrfs_crit(root->fs_info, \
"corrupt %s, %s: block=%llu, root=%llu, slot=%d", \
btrfs_header_level(eb) == 0 ? "leaf" : "node", \
reason, btrfs_header_bytenr(eb), root->objectid, slot)
static noinline int check_leaf(struct btrfs_root *root,
struct extent_buffer *leaf)
{
struct btrfs_fs_info *fs_info = root->fs_info;
struct btrfs_key key;
struct btrfs_key leaf_key;
u32 nritems = btrfs_header_nritems(leaf);
int slot;
/*
* Extent buffers from a relocation tree have a owner field that
* corresponds to the subvolume tree they are based on. So just from an
* extent buffer alone we can not find out what is the id of the
* corresponding subvolume tree, so we can not figure out if the extent
* buffer corresponds to the root of the relocation tree or not. So skip
* this check for relocation trees.
*/
if (nritems == 0 && !btrfs_header_flag(leaf, BTRFS_HEADER_FLAG_RELOC)) {
struct btrfs_root *check_root;
key.objectid = btrfs_header_owner(leaf);
key.type = BTRFS_ROOT_ITEM_KEY;
key.offset = (u64)-1;
check_root = btrfs_get_fs_root(fs_info, &key, false);
/*
* The only reason we also check NULL here is that during
* open_ctree() some roots has not yet been set up.
*/
if (!IS_ERR_OR_NULL(check_root)) {
struct extent_buffer *eb;
eb = btrfs_root_node(check_root);
/* if leaf is the root, then it's fine */
if (leaf != eb) {
CORRUPT("non-root leaf's nritems is 0",
leaf, check_root, 0);
free_extent_buffer(eb);
return -EIO;
}
free_extent_buffer(eb);
}
return 0;
}
if (nritems == 0)
return 0;
/* Check the 0 item */
if (btrfs_item_offset_nr(leaf, 0) + btrfs_item_size_nr(leaf, 0) !=
BTRFS_LEAF_DATA_SIZE(fs_info)) {
CORRUPT("invalid item offset size pair", leaf, root, 0);
return -EIO;
}
/*
* Check to make sure each items keys are in the correct order and their
* offsets make sense. We only have to loop through nritems-1 because
* we check the current slot against the next slot, which verifies the
* next slot's offset+size makes sense and that the current's slot
* offset is correct.
*/
for (slot = 0; slot < nritems - 1; slot++) {
btrfs_item_key_to_cpu(leaf, &leaf_key, slot);
btrfs_item_key_to_cpu(leaf, &key, slot + 1);
/* Make sure the keys are in the right order */
if (btrfs_comp_cpu_keys(&leaf_key, &key) >= 0) {
CORRUPT("bad key order", leaf, root, slot);
return -EIO;
}
/*
* Make sure the offset and ends are right, remember that the
* item data starts at the end of the leaf and grows towards the
* front.
*/
if (btrfs_item_offset_nr(leaf, slot) !=
btrfs_item_end_nr(leaf, slot + 1)) {
CORRUPT("slot offset bad", leaf, root, slot);
return -EIO;
}
/*
* Check to make sure that we don't point outside of the leaf,
* just in case all the items are consistent to each other, but
* all point outside of the leaf.
*/
if (btrfs_item_end_nr(leaf, slot) >
BTRFS_LEAF_DATA_SIZE(fs_info)) {
CORRUPT("slot end outside of leaf", leaf, root, slot);
return -EIO;
}
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Josef Bacik | 223 | 62.99% | 1 | 14.29% |
| Liu Bo | 101 | 28.53% | 2 | 28.57% |
| Filipe David Borba Manana | 18 | 5.08% | 1 | 14.29% |
| Jeff Mahoney | 11 | 3.11% | 2 | 28.57% |
| Nicholas D Steeves | 1 | 0.28% | 1 | 14.29% |
| Total | 354 | 100.00% | 7 | 100.00% |
static int check_node(struct btrfs_root *root, struct extent_buffer *node)
{
unsigned long nr = btrfs_header_nritems(node);
struct btrfs_key key, next_key;
int slot;
u64 bytenr;
int ret = 0;
if (nr == 0 || nr > BTRFS_NODEPTRS_PER_BLOCK(root->fs_info)) {
btrfs_crit(root->fs_info,
"corrupt node: block %llu root %llu nritems %lu",
node->start, root->objectid, nr);
return -EIO;
}
for (slot = 0; slot < nr - 1; slot++) {
bytenr = btrfs_node_blockptr(node, slot);
btrfs_node_key_to_cpu(node, &key, slot);
btrfs_node_key_to_cpu(node, &next_key, slot + 1);
if (!bytenr) {
CORRUPT("invalid item slot", node, root, slot);
ret = -EIO;
goto out;
}
if (btrfs_comp_cpu_keys(&key, &next_key) >= 0) {
CORRUPT("bad key order", node, root, slot);
ret = -EIO;
goto out;
}
}
out:
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Liu Bo | 193 | 98.97% | 2 | 66.67% |
| Jeff Mahoney | 2 | 1.03% | 1 | 33.33% |
| Total | 195 | 100.00% | 3 | 100.00% |
static int btree_readpage_end_io_hook(struct btrfs_io_bio *io_bio,
u64 phy_offset, struct page *page,
u64 start, u64 end, int mirror)
{
u64 found_start;
int found_level;
struct extent_buffer *eb;
struct btrfs_root *root = BTRFS_I(page->mapping->host)->root;
struct btrfs_fs_info *fs_info = root->fs_info;
int ret = 0;
int reads_done;
if (!page->private)
goto out;
eb = (struct extent_buffer *)page->private;
/* the pending IO might have been the only thing that kept this buffer
* in memory. Make sure we have a ref for all this other checks
*/
extent_buffer_get(eb);
reads_done = atomic_dec_and_test(&eb->io_pages);
if (!reads_done)
goto err;
eb->read_mirror = mirror;
if (test_bit(EXTENT_BUFFER_READ_ERR, &eb->bflags)) {
ret = -EIO;
goto err;
}
found_start = btrfs_header_bytenr(eb);
if (found_start != eb->start) {
btrfs_err_rl(fs_info, "bad tree block start %llu %llu",
found_start, eb->start);
ret = -EIO;
goto err;
}
if (check_tree_block_fsid(fs_info, eb)) {
btrfs_err_rl(fs_info, "bad fsid on block %llu",
eb->start);
ret = -EIO;
goto err;
}
found_level = btrfs_header_level(eb);
if (found_level >= BTRFS_MAX_LEVEL) {
btrfs_err(fs_info, "bad tree block level %d",
(int)btrfs_header_level(eb));
ret = -EIO;
goto err;
}
btrfs_set_buffer_lockdep_class(btrfs_header_owner(eb),
eb, found_level);
ret = csum_tree_block(fs_info, eb, 1);
if (ret)
goto err;
/*
* If this is a leaf block and it is corrupt, set the corrupt bit so
* that we don't try and read the other copies of this block, just
* return -EIO.
*/
if (found_level == 0 && check_leaf(root, eb)) {
set_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags);
ret = -EIO;
}
if (found_level > 0 && check_node(root, eb))
ret = -EIO;
if (!ret)
set_extent_buffer_uptodate(eb);
err:
if (reads_done &&
test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags))
btree_readahead_hook(fs_info, eb, ret);
if (ret) {
/*
* our io error hook is going to dec the io pages
* again, we have to make sure it has something
* to decrement
*/
atomic_inc(&eb->io_pages);
clear_extent_buffer_uptodate(eb);
}
free_extent_buffer(eb);
out:
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 194 | 49.11% | 17 | 44.74% |
| Josef Bacik | 118 | 29.87% | 7 | 18.42% |
| Arne Jansen | 19 | 4.81% | 1 | 2.63% |
| Liu Bo | 18 | 4.56% | 1 | 2.63% |
| David Woodhouse | 11 | 2.78% | 1 | 2.63% |
| Zhao Lei | 10 | 2.53% | 1 | 2.63% |
| Miao Xie | 8 | 2.03% | 1 | 2.63% |
| David Sterba | 7 | 1.77% | 2 | 5.26% |
| Shilong Wang | 3 | 0.76% | 1 | 2.63% |
| Daniel Dressler | 2 | 0.51% | 1 | 2.63% |
| Filipe David Borba Manana | 1 | 0.25% | 1 | 2.63% |
| Frank Holton | 1 | 0.25% | 1 | 2.63% |
| Christoph Hellwig | 1 | 0.25% | 1 | 2.63% |
| Zheng Yan | 1 | 0.25% | 1 | 2.63% |
| Tsutomu Itoh | 1 | 0.25% | 1 | 2.63% |
| Total | 395 | 100.00% | 38 | 100.00% |
static int btree_io_failed_hook(struct page *page, int failed_mirror)
{
struct extent_buffer *eb;
eb = (struct extent_buffer *)page->private;
set_bit(EXTENT_BUFFER_READ_ERR, &eb->bflags);
eb->read_mirror = failed_mirror;
atomic_dec(&eb->io_pages);
if (test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags))
btree_readahead_hook(eb->fs_info, eb, -EIO);
return -EIO; /* we fixed nothing */
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arne Jansen | 50 | 60.24% | 1 | 12.50% |
| Josef Bacik | 20 | 24.10% | 3 | 37.50% |
| David Woodhouse | 8 | 9.64% | 1 | 12.50% |
| Zhao Lei | 3 | 3.61% | 1 | 12.50% |
| Jan Schmidt | 1 | 1.20% | 1 | 12.50% |
| Filipe David Borba Manana | 1 | 1.20% | 1 | 12.50% |
| Total | 83 | 100.00% | 8 | 100.00% |
static void end_workqueue_bio(struct bio *bio)
{
struct btrfs_end_io_wq *end_io_wq = bio->bi_private;
struct btrfs_fs_info *fs_info;
struct btrfs_workqueue *wq;
btrfs_work_func_t func;
fs_info = end_io_wq->info;
end_io_wq->error = bio->bi_error;
if (bio_op(bio) == REQ_OP_WRITE) {
if (end_io_wq->metadata == BTRFS_WQ_ENDIO_METADATA) {
wq = fs_info->endio_meta_write_workers;
func = btrfs_endio_meta_write_helper;
} else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_FREE_SPACE) {
wq = fs_info->endio_freespace_worker;
func = btrfs_freespace_write_helper;
} else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) {
wq = fs_info->endio_raid56_workers;
func = btrfs_endio_raid56_helper;
} else {
wq = fs_info->endio_write_workers;
func = btrfs_endio_write_helper;
}
} else {
if (unlikely(end_io_wq->metadata ==
BTRFS_WQ_ENDIO_DIO_REPAIR)) {
wq = fs_info->endio_repair_workers;
func = btrfs_endio_repair_helper;
} else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) {
wq = fs_info->endio_raid56_workers;
func = btrfs_endio_raid56_helper;
} else if (end_io_wq->metadata) {
wq = fs_info->endio_meta_workers;
func = btrfs_endio_meta_helper;
} else {
wq = fs_info->endio_workers;
func = btrfs_endio_helper;
}
}
btrfs_init_work(&end_io_wq->work, func, end_workqueue_fn, NULL, NULL);
btrfs_queue_work(wq, &end_io_wq->work);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 83 | 34.87% | 6 | 42.86% |
| Liu Bo | 80 | 33.61% | 1 | 7.14% |
| David Woodhouse | 28 | 11.76% | 1 | 7.14% |
| Miao Xie | 24 | 10.08% | 1 | 7.14% |
| Josef Bacik | 13 | 5.46% | 1 | 7.14% |
| Michael Christie | 5 | 2.10% | 1 | 7.14% |
| Christoph Hellwig | 3 | 1.26% | 1 | 7.14% |
| David Sterba | 1 | 0.42% | 1 | 7.14% |
| Qu Wenruo | 1 | 0.42% | 1 | 7.14% |
| Total | 238 | 100.00% | 14 | 100.00% |
int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio,
enum btrfs_wq_endio_type metadata)
{
struct btrfs_end_io_wq *end_io_wq;
end_io_wq = kmem_cache_alloc(btrfs_end_io_wq_cache, GFP_NOFS);
if (!end_io_wq)
return -ENOMEM;
end_io_wq->private = bio->bi_private;
end_io_wq->end_io = bio->bi_end_io;
end_io_wq->info = info;
end_io_wq->error = 0;
end_io_wq->bio = bio;
end_io_wq->metadata = metadata;
bio->bi_private = end_io_wq;
bio->bi_end_io = end_workqueue_bio;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 92 | 94.85% | 2 | 50.00% |
| David Sterba | 5 | 5.15% | 2 | 50.00% |
| Total | 97 | 100.00% | 4 | 100.00% |
unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info)
{
unsigned long limit = min_t(unsigned long,
info->thread_pool_size,
info->fs_devices->open_devices);
return 256 * limit;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 28 | 96.55% | 3 | 75.00% |
| Qu Wenruo | 1 | 3.45% | 1 | 25.00% |
| Total | 29 | 100.00% | 4 | 100.00% |
static void run_one_async_start(struct btrfs_work *work)
{
struct async_submit_bio *async;
int ret;
async = container_of(work, struct async_submit_bio, work);
ret = async->submit_bio_start(async->inode, async->bio,
async->mirror_num, async->bio_flags,
async->bio_offset);
if (ret)
async->error = ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 53 | 77.94% | 3 | 75.00% |
| Jeff Mahoney | 15 | 22.06% | 1 | 25.00% |
| Total | 68 | 100.00% | 4 | 100.00% |
static void run_one_async_done(struct btrfs_work *work)
{
struct btrfs_fs_info *fs_info;
struct async_submit_bio *async;
int limit;
async = container_of(work, struct async_submit_bio, work);
fs_info = BTRFS_I(async->inode)->root->fs_info;
limit = btrfs_async_submit_limit(fs_info);
limit = limit * 2 / 3;
/*
* atomic_dec_return implies a barrier for waitqueue_active
*/
if (atomic_dec_return(&fs_info->nr_async_submits) < limit &&
waitqueue_active(&fs_info->async_submit_wait))
wake_up(&fs_info->async_submit_wait);
/* If an error occurred we just want to clean up the bio and move on */
if (async->error) {
async->bio->bi_error = async->error;
bio_endio(async->bio);
return;
}
async->submit_bio_done(async->inode, async->bio, async->mirror_num,
async->bio_flags, async->bio_offset);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 116 | 80.00% | 7 | 58.33% |
| Jeff Mahoney | 17 | 11.72% | 1 | 8.33% |
| Christoph Hellwig | 9 | 6.21% | 1 | 8.33% |
| David Sterba | 1 | 0.69% | 1 | 8.33% |
| Josef Bacik | 1 | 0.69% | 1 | 8.33% |
| Adam Buchbinder | 1 | 0.69% | 1 | 8.33% |
| Total | 145 | 100.00% | 12 | 100.00% |
static void run_one_async_free(struct btrfs_work *work)
{
struct async_submit_bio *async;
async = container_of(work, struct async_submit_bio, work);
kfree(async);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 33 | 100.00% | 2 | 100.00% |
| Total | 33 | 100.00% | 2 | 100.00% |
int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode,
struct bio *bio, int mirror_num,
unsigned long bio_flags,
u64 bio_offset,
extent_submit_bio_hook_t *submit_bio_start,
extent_submit_bio_hook_t *submit_bio_done)
{
struct async_submit_bio *async;
async = kmalloc(sizeof(*async), GFP_NOFS);
if (!async)
return -ENOMEM;
async->inode = inode;
async->bio = bio;
async->mirror_num = mirror_num;
async->submit_bio_start = submit_bio_start;
async->submit_bio_done = submit_bio_done;
btrfs_init_work(&async->work, btrfs_worker_helper, run_one_async_start,
run_one_async_done, run_one_async_free);
async->bio_flags = bio_flags;
async->bio_offset = bio_offset;
async->error = 0;
atomic_inc(&fs_info->nr_async_submits);
if (op_is_sync(bio->bi_opf))
btrfs_set_work_high_priority(&async->work);
btrfs_queue_work(fs_info->workers, &async->work);
while (atomic_read(&fs_info->async_submit_draining) &&
atomic_read(&fs_info->nr_async_submits)) {
wait_event(fs_info->async_submit_wait,
(atomic_read(&fs_info->nr_async_submits) == 0));
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 185 | 88.94% | 8 | 57.14% |
| Qu Wenruo | 9 | 4.33% | 1 | 7.14% |
| Jeff Mahoney | 6 | 2.88% | 1 | 7.14% |
| Christoph Hellwig | 3 | 1.44% | 1 | 7.14% |
| Liu Bo | 2 | 0.96% | 1 | 7.14% |
| Michael Christie | 2 | 0.96% | 1 | 7.14% |
| Jens Axboe | 1 | 0.48% | 1 | 7.14% |
| Total | 208 | 100.00% | 14 | 100.00% |
static int btree_csum_one_bio(struct bio *bio)
{
struct bio_vec *bvec;
struct btrfs_root *root;
int i, ret = 0;
bio_for_each_segment_all(bvec, bio, i) {
root = BTRFS_I(bvec->bv_page->mapping->host)->root;
ret = csum_dirty_buffer(root->fs_info, bvec->bv_page);
if (ret)
break;
}
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 51 | 68.92% | 1 | 25.00% |
| Jeff Mahoney | 13 | 17.57% | 1 | 25.00% |
| Kent Overstreet | 8 | 10.81% | 1 | 25.00% |
| Daniel Dressler | 2 | 2.70% | 1 | 25.00% |
| Total | 74 | 100.00% | 4 | 100.00% |
static int __btree_submit_bio_start(struct inode *inode, struct bio *bio,
int mirror_num, unsigned long bio_flags,
u64 bio_offset)
{
/*
* when we're called for a write, we're already in the async
* submission context. Just jump into btrfs_map_bio
*/
return btree_csum_one_bio(bio);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 32 | 96.97% | 7 | 87.50% |
| Jeff Mahoney | 1 | 3.03% | 1 | 12.50% |
| Total | 33 | 100.00% | 8 | 100.00% |
static int __btree_submit_bio_done(struct inode *inode, struct bio *bio,
int mirror_num, unsigned long bio_flags,
u64 bio_offset)
{
int ret;
/*
* when we're called for a write, we're already in the async
* submission context. Just jump into btrfs_map_bio
*/
ret = btrfs_map_bio(btrfs_sb(inode->i_sb), bio, mirror_num, 1);
if (ret) {
bio->bi_error = ret;
bio_endio(bio);
}
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 40 | 58.82% | 6 | 66.67% |
| Stefan Behrens | 17 | 25.00% | 1 | 11.11% |
| Christoph Hellwig | 8 | 11.76% | 1 | 11.11% |
| Jeff Mahoney | 3 | 4.41% | 1 | 11.11% |
| Total | 68 | 100.00% | 9 | 100.00% |
static int check_async_write(unsigned long bio_flags)
{
if (bio_flags & EXTENT_BIO_TREE_LOG)
return 0;
#ifdef CONFIG_X86
if (static_cpu_has(X86_FEATURE_XMM4_2))
return 0;
#endif
return 1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Josef Bacik | 33 | 89.19% | 1 | 33.33% |
| Borislav Petkov | 4 | 10.81% | 2 | 66.67% |
| Total | 37 | 100.00% | 3 | 100.00% |
static int btree_submit_bio_hook(struct inode *inode, struct bio *bio,
int mirror_num, unsigned long bio_flags,
u64 bio_offset)
{
struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
int async = check_async_write(bio_flags);
int ret;
if (bio_op(bio) != REQ_OP_WRITE) {
/*
* called for a read, do the setup so that checksum validation
* can happen in the async kernel threads
*/
ret = btrfs_bio_wq_end_io(fs_info, bio,
BTRFS_WQ_ENDIO_METADATA);
if (ret)
goto out_w_error;
ret = btrfs_map_bio(fs_info, bio, mirror_num, 0);
} else if (!async) {
ret = btree_csum_one_bio(bio);
if (ret)
goto out_w_error;
ret = btrfs_map_bio(fs_info, bio, mirror_num, 0);
} else {
/*
* kthread helpers are used to submit writes so that
* checksumming can happen in parallel across all CPUs
*/
ret = btrfs_wq_submit_bio(fs_info, inode, bio, mirror_num, 0,
bio_offset,
__btree_submit_bio_start,
__btree_submit_bio_done);
}
if (ret)
goto out_w_error;
return 0;
out_w_error:
bio->bi_error = ret;
bio_endio(bio);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 74 | 41.57% | 6 | 42.86% |
| Josef Bacik | 37 | 20.79% | 1 | 7.14% |
| Stefan Behrens | 30 | 16.85% | 1 | 7.14% |
| Jeff Mahoney | 18 | 10.11% | 3 | 21.43% |
| Christoph Hellwig | 12 | 6.74% | 1 | 7.14% |
| Michael Christie | 6 | 3.37% | 1 | 7.14% |
| David Sterba | 1 | 0.56% | 1 | 7.14% |
| Total | 178 | 100.00% | 14 | 100.00% |
#ifdef CONFIG_MIGRATION
static int btree_migratepage(struct address_space *mapping,
struct page *newpage, struct page *page,
enum migrate_mode mode)
{
/*
* we can't safely write a btree page from here,
* we haven't done the locking hook
*/
if (PageDirty(page))
return -EAGAIN;
/*
* Buffers may be managed in a filesystem specific way.
* We must have no buffers or drop them.
*/
if (page_has_private(page) &&
!try_to_release_page(page, GFP_KERNEL))
return -EAGAIN;
return migrate_page(mapping, newpage, page, mode);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 63 | 91.30% | 1 | 33.33% |
| Mel Gorman | 6 | 8.70% | 2 | 66.67% |
| Total | 69 | 100.00% | 3 | 100.00% |
#endif
static int btree_writepages(struct address_space *mapping,
struct writeback_control *wbc)
{
struct btrfs_fs_info *fs_info;
int ret;
if (wbc->sync_mode == WB_SYNC_NONE) {
if (wbc->for_kupdate)
return 0;
fs_info = BTRFS_I(mapping->host)->root->fs_info;
/* this is a bit racy, but that's ok */
ret = percpu_counter_compare(&fs_info->dirty_metadata_bytes,
BTRFS_DIRTY_METADATA_THRESH);
if (ret < 0)
return 0;
}
return btree_write_cache_pages(mapping, wbc);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 57 | 66.28% | 2 | 50.00% |
| Miao Xie | 28 | 32.56% | 1 | 25.00% |
| Josef Bacik | 1 | 1.16% | 1 | 25.00% |
| Total | 86 | 100.00% | 4 | 100.00% |
static int btree_readpage(struct file *file, struct page *page)
{
struct extent_io_tree *tree;
tree = &BTRFS_I(page->mapping->host)->io_tree;
return extent_read_full_page(tree, page, btree_get_extent, 0);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 44 | 93.62% | 1 | 33.33% |
| Jan Schmidt | 2 | 4.26% | 1 | 33.33% |
| Christoph Hellwig | 1 | 2.13% | 1 | 33.33% |
| Total | 47 | 100.00% | 3 | 100.00% |
static int btree_releasepage(struct page *page, gfp_t gfp_flags)
{
if (PageWriteback(page) || PageDirty(page))
return 0;
return try_release_extent_buffer(page);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 34 | 97.14% | 3 | 75.00% |
| Josef Bacik | 1 | 2.86% | 1 | 25.00% |
| Total | 35 | 100.00% | 4 | 100.00% |
static void btree_invalidatepage(struct page *page, unsigned int offset,
unsigned int length)
{
struct extent_io_tree *tree;
tree = &BTRFS_I(page->mapping->host)->io_tree;
extent_invalidatepage(tree, page, offset);
btree_releasepage(page, GFP_NOFS);
if (PagePrivate(page)) {
btrfs_warn(BTRFS_I(page->mapping->host)->root->fs_info,
"page private not zero on page %llu",
(unsigned long long)page_offset(page));
ClearPagePrivate(page);
set_page_private(page, 0);
put_page(page);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 87 | 80.56% | 9 | 75.00% |
| Frank Holton | 15 | 13.89% | 1 | 8.33% |
| Lukas Czerner | 5 | 4.63% | 1 | 8.33% |
| Kirill A. Shutemov | 1 | 0.93% | 1 | 8.33% |
| Total | 108 | 100.00% | 12 | 100.00% |
static int btree_set_page_dirty(struct page *page)
{
#ifdef DEBUG
struct extent_buffer *eb;
BUG_ON(!PagePrivate(page));
eb = (struct extent_buffer *)page->private;
BUG_ON(!eb);
BUG_ON(!test_bit(EXTENT_BUFFER_DIRTY, &eb->bflags));
BUG_ON(!atomic_read(&eb->refs));
btrfs_assert_tree_locked(eb);
#endif
return __set_page_dirty_nobuffers(page);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Josef Bacik | 84 | 100.00% | 2 | 100.00% |
| Total | 84 | 100.00% | 2 | 100.00% |
static const struct address_space_operations btree_aops = {
.readpage = btree_readpage,
.writepages = btree_writepages,
.releasepage = btree_releasepage,
.invalidatepage = btree_invalidatepage,
#ifdef CONFIG_MIGRATION
.migratepage = btree_migratepage,
#endif
.set_page_dirty = btree_set_page_dirty,
};
void readahead_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr)
{
struct extent_buffer *buf = NULL;
struct inode *btree_inode = fs_info->btree_inode;
buf = btrfs_find_create_tree_block(fs_info, bytenr);
if (IS_ERR(buf))
return;
read_extent_buffer_pages(&BTRFS_I(btree_inode)->io_tree,
buf, WAIT_NONE, btree_get_extent, 0);
free_extent_buffer(buf);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 61 | 87.14% | 10 | 71.43% |
| Jeff Mahoney | 3 | 4.29% | 1 | 7.14% |
| Liu Bo | 3 | 4.29% | 1 | 7.14% |
| David Sterba | 2 | 2.86% | 1 | 7.14% |
| Arne Jansen | 1 | 1.43% | 1 | 7.14% |
| Total | 70 | 100.00% | 14 | 100.00% |
int reada_tree_block_flagged(struct btrfs_fs_info *fs_info, u64 bytenr,
int mirror_num, struct extent_buffer **eb)
{
struct extent_buffer *buf = NULL;
struct inode *btree_inode = fs_info->btree_inode;
struct extent_io_tree *io_tree = &BTRFS_I(btree_inode)->io_tree;
int ret;
buf = btrfs_find_create_tree_block(fs_info, bytenr);
if (IS_ERR(buf))
return 0;
set_bit(EXTENT_BUFFER_READAHEAD, &buf->bflags);
ret = read_extent_buffer_pages(io_tree, buf, WAIT_PAGE_LOCK,
btree_get_extent, mirror_num);
if (ret) {
free_extent_buffer(buf);
return ret;
}
if (test_bit(EXTENT_BUFFER_CORRUPT, &buf->bflags)) {
free_extent_buffer(buf);
return -EIO;
} else if (extent_buffer_uptodate(buf)) {
*eb = buf;
} else {
free_extent_buffer(buf);
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arne Jansen | 128 | 79.50% | 1 | 25.00% |
| Chris Mason | 27 | 16.77% | 1 | 25.00% |
| Jeff Mahoney | 3 | 1.86% | 1 | 25.00% |
| Liu Bo | 3 | 1.86% | 1 | 25.00% |
| Total | 161 | 100.00% | 4 | 100.00% |
struct extent_buffer *btrfs_find_create_tree_block(
struct btrfs_fs_info *fs_info,
u64 bytenr)
{
if (btrfs_is_testing(fs_info))
return alloc_test_extent_buffer(fs_info, bytenr);
return alloc_extent_buffer(fs_info, bytenr);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 19 | 50.00% | 1 | 20.00% |
| Josef Bacik | 15 | 39.47% | 2 | 40.00% |
| Jeff Mahoney | 4 | 10.53% | 2 | 40.00% |
| Total | 38 | 100.00% | 5 | 100.00% |
int btrfs_write_tree_block(struct extent_buffer *buf)
{
return filemap_fdatawrite_range(buf->pages[0]->mapping, buf->start,
buf->start + buf->len - 1);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 36 | 97.30% | 2 | 66.67% |
| Christoph Hellwig | 1 | 2.70% | 1 | 33.33% |
| Total | 37 | 100.00% | 3 | 100.00% |
int btrfs_wait_tree_block_writeback(struct extent_buffer *buf)
{
return filemap_fdatawait_range(buf->pages[0]->mapping,
buf->start, buf->start + buf->len - 1);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 36 | 97.30% | 2 | 66.67% |
| Christoph Hellwig | 1 | 2.70% | 1 | 33.33% |
| Total | 37 | 100.00% | 3 | 100.00% |
struct extent_buffer *read_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr,
u64 parent_transid)
{
struct extent_buffer *buf = NULL;
int ret;
buf = btrfs_find_create_tree_block(fs_info, bytenr);
if (IS_ERR(buf))
return buf;
ret = btree_read_extent_buffer_pages(fs_info, buf, parent_transid);
if (ret) {
free_extent_buffer(buf);
return ERR_PTR(ret);
}
return buf;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 53 | 67.95% | 6 | 60.00% |
| Filipe David Borba Manana | 13 | 16.67% | 1 | 10.00% |
| Liu Bo | 8 | 10.26% | 2 | 20.00% |
| Jeff Mahoney | 4 | 5.13% | 1 | 10.00% |
| Total | 78 | 100.00% | 10 | 100.00% |
void clean_tree_block(struct btrfs_fs_info *fs_info,
struct extent_buffer *buf)
{
if (btrfs_header_generation(buf) ==
fs_info->running_transaction->transid) {
btrfs_assert_tree_locked(buf);
if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &buf->bflags)) {
__percpu_counter_add(&fs_info->dirty_metadata_bytes,
-buf->len,
fs_info->dirty_metadata_batch);
/* ugh, clear_extent_buffer_dirty needs to lock the page */
btrfs_set_lock_blocking(buf);
clear_extent_buffer_dirty(buf);
}
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 65 | 84.42% | 8 | 66.67% |
| Jeff Mahoney | 7 | 9.09% | 1 | 8.33% |
| Miao Xie | 2 | 2.60% | 1 | 8.33% |
| Daniel Dressler | 2 | 2.60% | 1 | 8.33% |
| Josef Bacik | 1 | 1.30% | 1 | 8.33% |
| Total | 77 | 100.00% | 12 | 100.00% |
static struct btrfs_subvolume_writers *btrfs_alloc_subvolume_writers(void)
{
struct btrfs_subvolume_writers *writers;
int ret;
writers = kmalloc(sizeof(*writers), GFP_NOFS);
if (!writers)
return ERR_PTR(-ENOMEM);
ret = percpu_counter_init(&writers->counter, 0, GFP_KERNEL);
if (ret < 0) {
kfree(writers);
return ERR_PTR(ret);
}
init_waitqueue_head(&writers->wait);
return writers;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Miao Xie | 85 | 97.70% | 1 | 50.00% |
| Tejun Heo | 2 | 2.30% | 1 | 50.00% |
| Total | 87 | 100.00% | 2 | 100.00% |
static void
btrfs_free_subvolume_writers(struct btrfs_subvolume_writers *writers)
{
percpu_counter_destroy(&writers->counter);
kfree(writers);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Miao Xie | 24 | 100.00% | 1 | 100.00% |
| Total | 24 | 100.00% | 1 | 100.00% |
static void __setup_root(struct btrfs_root *root, struct btrfs_fs_info *fs_info,
u64 objectid)
{
bool dummy = test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
root->node = NULL;
root->commit_root = NULL;
root->state = 0;
root->orphan_cleanup_state = 0;
root->objectid = objectid;
root->last_trans = 0;
root->highest_objectid = 0;
root->nr_delalloc_inodes = 0;
root->nr_ordered_extents = 0;
root->name = NULL;
root->inode_tree = RB_ROOT;
INIT_RADIX_TREE(&root->delayed_nodes_tree, GFP_ATOMIC);
root->block_rsv = NULL;
root->orphan_block_rsv = NULL;
INIT_LIST_HEAD(&root->dirty_list);
INIT_LIST_HEAD(&root->root_list);
INIT_LIST_HEAD(&root->delalloc_inodes);
INIT_LIST_HEAD(&root->delalloc_root);
INIT_LIST_HEAD(&root->ordered_extents);
INIT_LIST_HEAD(&root->ordered_root);
INIT_LIST_HEAD(&root->logged_list[0]);
INIT_LIST_HEAD(&root->logged_list[1]);
spin_lock_init(&root->orphan_lock);
spin_lock_init(&root->inode_lock);
spin_lock_init(&root->delalloc_lock);
spin_lock_init(&root->ordered_extent_lock);
spin_lock_init(&root->accounting_lock);
spin_lock_init(&root->log_extents_lock[0]);
spin_lock_init(&root->log_extents_lock[1]);
mutex_init(&root->objectid_mutex);
mutex_init(&root->log_mutex);
mutex_init(&root->ordered_extent_mutex);
mutex_init(&root->delalloc_mutex);
init_waitqueue_head(&root->log_writer_wait);
init_waitqueue_head(&root->log_commit_wait[0]);
init_waitqueue_head(&root->log_commit_wait[1]);
INIT_LIST_HEAD(&root->log_ctxs[0]);
INIT_LIST_HEAD(&root->log_ctxs[1]);
atomic_set(&root->log_commit[0], 0);
atomic_set(&root->log_commit[1], 0);
atomic_set(&root->log_writers, 0);
atomic_set(&root->log_batch, 0);
atomic_set(&root->orphan_inodes, 0);
atomic_set(&root->refs, 1);
atomic_set(&root->will_be_snapshoted, 0);
atomic64_set(&root->qgroup_meta_rsv, 0);
root->log_transid = 0;
root->log_transid_committed = -1;
root->last_log_commit = 0;
if (!dummy)
extent_io_tree_init(&root->dirty_log_pages,
fs_info->btree_inode->i_mapping);
memset(&root->root_key, 0, sizeof(root->root_key));
memset(&root->root_item, 0, sizeof(root->root_item));
memset(&root->defrag_progress, 0, sizeof(root->defrag_progress));
if (!dummy)
root->defrag_trans_start = fs_info->generation;
else
root->defrag_trans_start = 0;
root->root_key.objectid = objectid;
root->anon_dev = 0;
spin_lock_init(&root->root_item_lock);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 178 | 32.19% | 21 | 40.38% |
| Miao Xie | 143 | 25.86% | 11 | 21.15% |
| Zheng Yan | 115 | 20.80% | 7 | 13.46% |
| Josef Bacik | 79 | 14.29% | 5 | 9.62% |
| Jeff Mahoney | 18 | 3.25% | 2 | 3.85% |
| Qu Wenruo | 9 | 1.63% | 1 | 1.92% |
| Alexander Block | 7 | 1.27% | 1 | 1.92% |
| Al Viro | 1 | 0.18% | 1 | 1.92% |
| Anand Jain | 1 | 0.18% | 1 | 1.92% |
| Goldwyn Rodrigues | 1 | 0.18% | 1 | 1.92% |
| Eric Paris | 1 | 0.18% | 1 | 1.92% |
| Total | 553 | 100.00% | 52 | 100.00% |
static struct btrfs_root *btrfs_alloc_root(struct btrfs_fs_info *fs_info,
gfp_t flags)
{
struct btrfs_root *root = kzalloc(sizeof(*root), flags);
if (root)
root->fs_info = fs_info;
return root;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Al Viro | 36 | 80.00% | 1 | 25.00% |
| Chris Mason | 5 | 11.11% | 2 | 50.00% |
| David Sterba | 4 | 8.89% | 1 | 25.00% |
| Total | 45 | 100.00% | 4 | 100.00% |
#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
/* Should only be used by the testing infrastructure */
struct btrfs_root *btrfs_alloc_dummy_root(struct btrfs_fs_info *fs_info)
{
struct btrfs_root *root;
if (!fs_info)
return ERR_PTR(-EINVAL);
root = btrfs_alloc_root(fs_info, GFP_KERNEL);
if (!root)
return ERR_PTR(-ENOMEM);
/* We don't use the stripesize in selftest, set it as sectorsize */
__setup_root(root, fs_info, BTRFS_ROOT_TREE_OBJECTID);
root->alloc_bytenr = 0;
return root;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Josef Bacik | 47 | 68.12% | 2 | 33.33% |
| Jeff Mahoney | 18 | 26.09% | 1 | 16.67% |
| Feifei Xu | 2 | 2.90% | 2 | 33.33% |
| David Sterba | 2 | 2.90% | 1 | 16.67% |
| Total | 69 | 100.00% | 6 | 100.00% |
#endif
struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info,
u64 objectid)
{
struct extent_buffer *leaf;
struct btrfs_root *tree_root = fs_info->tree_root;
struct btrfs_root *root;
struct btrfs_key key;
int ret = 0;
uuid_le uuid;
root = btrfs_alloc_root(fs_info, GFP_KERNEL);
if (!root)
return ERR_PTR(-ENOMEM);
__setup_root(root, fs_info, objectid);
root->root_key.objectid = objectid;
root->root_key.type = BTRFS_ROOT_ITEM_KEY;
root->root_key.offset = 0;
leaf = btrfs_alloc_tree_block(trans, root, 0, objectid, NULL, 0, 0, 0);
if (IS_ERR(leaf)) {
ret = PTR_ERR(leaf);
leaf = NULL;
goto fail;
}
memzero_extent_buffer(leaf, 0, sizeof(struct btrfs_header));
btrfs_set_header_bytenr(leaf, leaf->start);
btrfs_set_header_generation(leaf, trans->transid);
btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV);
btrfs_set_header_owner(leaf, objectid);
root->node = leaf;
write_extent_buffer_fsid(leaf, fs_info->fsid);
write_extent_buffer_chunk_tree_uuid(leaf, fs_info->chunk_tree_uuid);
btrfs_mark_buffer_dirty(leaf);
root->commit_root = btrfs_root_node(root);
set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state);
root->root_item.flags = 0;
root->root_item.byte_limit = 0;
btrfs_set_root_bytenr(&root->root_item, leaf->start);
btrfs_set_root_generation(&root->root_item, trans->transid);
btrfs_set_root_level(&root->root_item, 0);
btrfs_set_root_refs(&root->root_item, 1);
btrfs_set_root_used(&root->root_item, leaf->len);
btrfs_set_root_last_snapshot(&root->root_item, 0);
btrfs_set_root_dirid(&root->root_item, 0);
uuid_le_gen(&uuid);
memcpy(root->root_item.uuid, uuid.b, BTRFS_UUID_SIZE);
root->root_item.drop_level = 0;
key.objectid = objectid;
key.type = BTRFS_ROOT_ITEM_KEY;
key.offset = 0;
ret = btrfs_insert_root(trans, tree_root, &key, &root->root_item);
if (ret)
goto fail;
btrfs_tree_unlock(leaf);
return root;
fail:
if (leaf) {
btrfs_tree_unlock(leaf);
free_extent_buffer(root->commit_root);
free_extent_buffer(leaf);
}
kfree(root);
return ERR_PTR(ret);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arne Jansen | 340 | 75.72% | 1 | 6.67% |
| Chris Mason | 38 | 8.46% | 5 | 33.33% |
| Tsutomu Itoh | 32 | 7.13% | 2 | 13.33% |
| Stefan Behrens | 23 | 5.12% | 1 | 6.67% |
| Miao Xie | 7 | 1.56% | 1 | 6.67% |
| David Sterba | 6 | 1.34% | 4 | 26.67% |
| Zheng Yan | 3 | 0.67% | 1 | 6.67% |
| Total | 449 | 100.00% | 15 | 100.00% |
static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info)
{
struct btrfs_root *root;
struct extent_buffer *leaf;
root = btrfs_alloc_root(fs_info, GFP_NOFS);
if (!root)
return ERR_PTR(-ENOMEM);
__setup_root(root, fs_info, BTRFS_TREE_LOG_OBJECTID);
root->root_key.objectid = BTRFS_TREE_LOG_OBJECTID;
root->root_key.type = BTRFS_ROOT_ITEM_KEY;
root->root_key.offset = BTRFS_TREE_LOG_OBJECTID;
/*
* DON'T set REF_COWS for log trees
*
* log trees do not get reference counted because they go away
* before a real commit is actually done. They do store pointers
* to file data extents, and those reference counts still get
* updated (along with back refs to the log tree).
*/
leaf = btrfs_alloc_tree_block(trans, root, 0, BTRFS_TREE_LOG_OBJECTID,
NULL, 0, 0, 0);
if (IS_ERR(leaf)) {
kfree(root);
return ERR_CAST(leaf);
}
memzero_extent_buffer(leaf, 0, sizeof(struct btrfs_header));
btrfs_set_header_bytenr(leaf, leaf->start);
btrfs_set_header_generation(leaf, trans->transid);
btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV);
btrfs_set_header_owner(leaf, BTRFS_TREE_LOG_OBJECTID);
root->node = leaf;
write_extent_buffer_fsid(root->node, fs_info->fsid);
btrfs_mark_buffer_dirty(root->node);
btrfs_tree_unlock(root->node);
return root;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 132 | 65.02% | 1 | 10.00% |
| Zheng Yan | 63 | 31.03% | 3 | 30.00% |
| David Sterba | 5 | 2.46% | 4 | 40.00% |
| Al Viro | 2 | 0.99% | 1 | 10.00% |
| Miao Xie | 1 | 0.49% | 1 | 10.00% |
| Total | 203 | 100.00% | 10 | 100.00% |
int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info)
{
struct btrfs_root *log_root;
log_root = alloc_log_tree(trans, fs_info);
if (IS_ERR(log_root))
return PTR_ERR(log_root);
WARN_ON(fs_info->log_root_tree);
fs_info->log_root_tree = log_root;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Zheng Yan | 54 | 93.10% | 1 | 50.00% |
| Chris Mason | 4 | 6.90% | 1 | 50.00% |
| Total | 58 | 100.00% | 2 | 100.00% |
int btrfs_add_log_tree(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
struct btrfs_fs_info *fs_info = root->fs_info;
struct btrfs_root *log_root;
struct btrfs_inode_item *inode_item;
log_root = alloc_log_tree(trans, fs_info);
if (IS_ERR(log_root))
return PTR_ERR(log_root);
log_root->last_trans = trans->transid;
log_root->root_key.offset = root->root_key.objectid;
inode_item = &log_root->root_item.inode;
btrfs_set_stack_inode_generation(inode_item, 1);
btrfs_set_stack_inode_size(inode_item, 3);
btrfs_set_stack_inode_nlink(inode_item, 1);
btrfs_set_stack_inode_nbytes(inode_item,
fs_info->nodesize);
btrfs_set_stack_inode_mode(inode_item, S_IFDIR | 0755);
btrfs_set_root_node(&log_root->root_item, log_root->node);
WARN_ON(root->log_root);
root->log_root = log_root;
root->log_transid = 0;
root->log_transid_committed = -1;
root->last_log_commit = 0;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Zheng Yan | 126 | 73.68% | 2 | 22.22% |
| Qu Wenruo | 15 | 8.77% | 1 | 11.11% |
| Chris Mason | 12 | 7.02% | 2 | 22.22% |
| Jeff Mahoney | 10 | 5.85% | 2 | 22.22% |
| Miao Xie | 7 | 4.09% | 1 | 11.11% |
| David Sterba | 1 | 0.58% | 1 | 11.11% |
| Total | 171 | 100.00% | 9 | 100.00% |
static struct btrfs_root *btrfs_read_tree_root(struct btrfs_root *tree_root,
struct btrfs_key *key)
{
struct btrfs_root *root;
struct btrfs_fs_info *fs_info = tree_root->fs_info;
struct btrfs_path *path;
u64 generation;
int ret;
path = btrfs_alloc_path();
if (!path)
return ERR_PTR(-ENOMEM);
root = btrfs_alloc_root(fs_info, GFP_NOFS);
if (!root) {
ret = -ENOMEM;
goto alloc_fail;
}
__setup_root(root, fs_info, key->objectid);
ret = btrfs_find_root(tree_root, key, path,
&root->root_item, &root->root_key);
if (ret) {
if (ret > 0)
ret = -ENOENT;
goto find_fail;
}
generation = btrfs_root_generation(&root->root_item);
root->node = read_tree_block(fs_info,
btrfs_root_bytenr(&root->root_item),
generation);
if (IS_ERR(root->node)) {
ret = PTR_ERR(root->node);
goto find_fail;
} else if (!btrfs_buffer_uptodate(root->node, generation, 0)) {
ret = -EIO;
free_extent_buffer(root->node);
goto find_fail;
}
root->commit_root = btrfs_root_node(root);
out:
btrfs_free_path(path);
return root;
find_fail:
kfree(root);
alloc_fail:
root = ERR_PTR(ret);
goto out;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 109 | 42.25% | 7 | 41.18% |
| Miao Xie | 70 | 27.13% | 1 | 5.88% |
| Josef Bacik | 28 | 10.85% | 1 | 5.88% |
| Zheng Yan | 23 | 8.91% | 2 | 11.76% |
| Liu Bo | 17 | 6.59% | 1 | 5.88% |
| Yan Zheng | 4 | 1.55% | 1 | 5.88% |
| Alexander Block | 3 | 1.16% | 1 | 5.88% |
| David Sterba | 2 | 0.78% | 1 | 5.88% |
| Stefan Behrens | 1 | 0.39% | 1 | 5.88% |
| Jeff Mahoney | 1 | 0.39% | 1 | 5.88% |
| Total | 258 | 100.00% | 17 | 100.00% |
struct btrfs_root *btrfs_read_fs_root(struct btrfs_root *tree_root,
struct btrfs_key *location)
{
struct btrfs_root *root;
root = btrfs_read_tree_root(tree_root, location);
if (IS_ERR(root))
return root;
if (root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID) {
set_bit(BTRFS_ROOT_REF_COWS, &root->state);
btrfs_check_and_init_root_item(&root->root_item);
}
return root;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Miao Xie | 45 | 60.81% | 2 | 25.00% |
| Chris Mason | 14 | 18.92% | 4 | 50.00% |
| Li Zefan | 10 | 13.51% | 1 | 12.50% |
| Zheng Yan | 5 | 6.76% | 1 | 12.50% |
| Total | 74 | 100.00% | 8 | 100.00% |
int btrfs_init_fs_root(struct btrfs_root *root)
{
int ret;
struct btrfs_subvolume_writers *writers;
root->free_ino_ctl = kzalloc(sizeof(*root->free_ino_ctl), GFP_NOFS);
root->free_ino_pinned = kzalloc(sizeof(*root->free_ino_pinned),
GFP_NOFS);
if (!root->free_ino_pinned || !root->free_ino_ctl) {
ret = -ENOMEM;
goto fail;
}
writers = btrfs_alloc_subvolume_writers();
if (IS_ERR(writers)) {
ret = PTR_ERR(writers);
goto fail;
}
root->subv_writers = writers;
btrfs_init_free_ino_ctl(root);
spin_lock_init(&root->ino_cache_lock);
init_waitqueue_head(&root->ino_cache_wait);
ret = get_anon_bdev(&root->anon_dev);
if (ret)
goto fail;
mutex_lock(&root->objectid_mutex);
ret = btrfs_find_highest_objectid(root,
&root->highest_objectid);
if (ret) {
mutex_unlock(&root->objectid_mutex);
goto fail;
}
ASSERT(root->highest_objectid <= BTRFS_LAST_FREE_OBJECTID);
mutex_unlock(&root->objectid_mutex);
return 0;
fail:
/* the caller is responsible to call free_fs_root */
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Miao Xie | 144 | 70.24% | 2 | 33.33% |
| Chandan Rajendra | 53 | 25.85% | 1 | 16.67% |
| Chris Mason | 3 | 1.46% | 1 | 16.67% |
| Liu Bo | 3 | 1.46% | 1 | 16.67% |
| David Sterba | 2 | 0.98% | 1 | 16.67% |
| Total | 205 | 100.00% | 6 | 100.00% |
struct btrfs_root *btrfs_lookup_fs_root(struct btrfs_fs_info *fs_info,
u64 root_id)
{
struct btrfs_root *root;
spin_lock(&fs_info->fs_roots_radix_lock);
root = radix_tree_lookup(&fs_info->fs_roots_radix,
(unsigned long)root_id);
spin_unlock(&fs_info->fs_roots_radix_lock);
return root;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Miao Xie | 53 | 96.36% | 1 | 50.00% |
| Josef Bacik | 2 | 3.64% | 1 | 50.00% |
| Total | 55 | 100.00% | 2 | 100.00% |
int btrfs_insert_fs_root(struct btrfs_fs_info *fs_info,
struct btrfs_root *root)
{
int ret;
ret = radix_tree_preload(GFP_NOFS);
if (ret)
return ret;
spin_lock(&fs_info->fs_roots_radix_lock);
ret = radix_tree_insert(&fs_info->fs_roots_radix,
(unsigned long)root->root_key.objectid,
root);
if (ret == 0)
set_bit(BTRFS_ROOT_IN_RADIX, &root->state);
spin_unlock(&fs_info->fs_roots_radix_lock);
radix_tree_preload_end();
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Miao Xie | 73 | 79.35% | 2 | 25.00% |
| Chris Mason | 9 | 9.78% | 4 | 50.00% |
| Li Zefan | 5 | 5.43% | 1 | 12.50% |
| Zheng Yan | 5 | 5.43% | 1 | 12.50% |
| Total | 92 | 100.00% | 8 | 100.00% |
struct btrfs_root *btrfs_get_fs_root(struct btrfs_fs_info *fs_info,
struct btrfs_key *location,
bool check_ref)
{
struct btrfs_root *root;
struct btrfs_path *path;
struct btrfs_key key;
int ret;
if (location->objectid == BTRFS_ROOT_TREE_OBJECTID)
return fs_info->tree_root;
if (location->objectid == BTRFS_EXTENT_TREE_OBJECTID)
return fs_info->extent_root;
if (location->objectid == BTRFS_CHUNK_TREE_OBJECTID)
return fs_info->chunk_root;
if (location->objectid == BTRFS_DEV_TREE_OBJECTID)
return fs_info->dev_root;
if (location->objectid == BTRFS_CSUM_TREE_OBJECTID)
return fs_info->csum_root;
if (location->objectid == BTRFS_QUOTA_TREE_OBJECTID)
return fs_info->quota_root ? fs_info->quota_root :
ERR_PTR(-ENOENT);
if (location->objectid == BTRFS_UUID_TREE_OBJECTID)
return fs_info->uuid_root ? fs_info->uuid_root :
ERR_PTR(-ENOENT);
if (location->objectid == BTRFS_FREE_SPACE_TREE_OBJECTID)
return fs_info->free_space_root ? fs_info->free_space_root :
ERR_PTR(-ENOENT);
again:
root = btrfs_lookup_fs_root(fs_info, location->objectid);
if (root) {
if (check_ref && btrfs_root_refs(&root->root_item) == 0)
return ERR_PTR(-ENOENT);
return root;
}
root = btrfs_read_fs_root(fs_info->tree_root, location);
if (IS_ERR(root))
return root;
if (check_ref && btrfs_root_refs(&root->root_item) == 0) {
ret = -ENOENT;
goto fail;
}
ret = btrfs_init_fs_root(root);
if (ret)
goto fail;
path = btrfs_alloc_path();
if (!path) {
ret = -ENOMEM;
goto fail;
}
key.objectid = BTRFS_ORPHAN_OBJECTID;
key.type = BTRFS_ORPHAN_ITEM_KEY;
key.offset = location->objectid;
ret = btrfs_search_slot(NULL, fs_info->tree_root, &key, path, 0, 0);
btrfs_free_path(path);
if (ret < 0)
goto fail;
if (ret == 0)
set_bit(BTRFS_ROOT_ORPHAN_ITEM_INSERTED, &root->state);
ret = btrfs_insert_fs_root(fs_info, root);
if (ret) {
if (ret == -EEXIST) {
free_fs_root(root);
goto again;
}
goto fail;
}
return root;
fail:
free_fs_root(root);
return ERR_PTR(ret);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 130 | 31.40% | 10 | 38.46% |
| Zheng Yan | 105 | 25.36% | 4 | 15.38% |
| David Sterba | 60 | 14.49% | 2 | 7.69% |
| Stefan Behrens | 44 | 10.63% | 2 | 7.69% |
| Omar Sandoval | 23 | 5.56% | 1 | 3.85% |
| Arne Jansen | 21 | 5.07% | 1 | 3.85% |
| Miao Xie | 19 | 4.59% | 3 | 11.54% |
| Li Zefan | 8 | 1.93% | 1 | 3.85% |
| Kelley Nielsen | 3 | 0.72% | 1 | 3.85% |
| Josef Bacik | 1 | 0.24% | 1 | 3.85% |
| Total | 414 | 100.00% | 26 | 100.00% |
static int btrfs_congested_fn(void *congested_data, int bdi_bits)
{
struct btrfs_fs_info *info = (struct btrfs_fs_info *)congested_data;
int ret = 0;
struct btrfs_device *device;
struct backing_dev_info *bdi;
rcu_read_lock();
list_for_each_entry_rcu(device, &info->fs_devices->devices, dev_list) {
if (!device->bdev)
continue;
bdi = device->bdev->bd_bdi;
if (bdi_congested(bdi, bdi_bits)) {
ret = 1;
break;
}
}
rcu_read_unlock();
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 82 | 90.11% | 4 | 50.00% |
| Xiao Guangrong | 4 | 4.40% | 2 | 25.00% |
| Qinghuang Feng | 3 | 3.30% | 1 | 12.50% |
| Jan Kara | 2 | 2.20% | 1 | 12.50% |
| Total | 91 | 100.00% | 8 | 100.00% |
static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi)
{
int err;
err = bdi_setup_and_register(bdi, "btrfs");
if (err)
return err;
bdi->ra_pages = VM_MAX_READAHEAD * 1024 / PAGE_SIZE;
bdi->congested_fn = btrfs_congested_fn;
bdi->congested_data = info;
bdi->capabilities |= BDI_CAP_CGROUP_WRITEBACK;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 61 | 92.42% | 4 | 66.67% |
| Christoph Hellwig | 4 | 6.06% | 1 | 16.67% |
| Kirill A. Shutemov | 1 | 1.52% | 1 | 16.67% |
| Total | 66 | 100.00% | 6 | 100.00% |
/*
* called by the kthread helper functions to finally call the bio end_io
* functions. This is where read checksum verification actually happens
*/
static void end_workqueue_fn(struct btrfs_work *work)
{
struct bio *bio;
struct btrfs_end_io_wq *end_io_wq;
end_io_wq = container_of(work, struct btrfs_end_io_wq, work);
bio = end_io_wq->bio;
bio->bi_error = end_io_wq->error;
bio->bi_private = end_io_wq->private;
bio->bi_end_io = end_io_wq->end_io;
kmem_cache_free(btrfs_end_io_wq_cache, end_io_wq);
bio_endio(bio);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 66 | 88.00% | 4 | 57.14% |
| David Sterba | 5 | 6.67% | 1 | 14.29% |
| Christoph Hellwig | 3 | 4.00% | 1 | 14.29% |
| Mike Snitzer | 1 | 1.33% | 1 | 14.29% |
| Total | 75 | 100.00% | 7 | 100.00% |
static int cleaner_kthread(void *arg)
{
struct btrfs_root *root = arg;
struct btrfs_fs_info *fs_info = root->fs_info;
int again;
struct btrfs_trans_handle *trans;
do {
again = 0;
/* Make the cleaner go to sleep early. */
if (btrfs_need_cleaner_sleep(fs_info))
goto sleep;
/*
* Do not do anything if we might cause open_ctree() to block
* before we have finished mounting the filesystem.
*/
if (!test_bit(BTRFS_FS_OPEN, &fs_info->flags))
goto sleep;
if (!mutex_trylock(&fs_info->cleaner_mutex))
goto sleep;
/*
* Avoid the problem that we change the status of the fs
* during the above check and trylock.
*/
if (btrfs_need_cleaner_sleep(fs_info)) {
mutex_unlock(&fs_info->cleaner_mutex);
goto sleep;
}
mutex_lock(&fs_info->cleaner_delayed_iput_mutex);
btrfs_run_delayed_iputs(fs_info);
mutex_unlock(&fs_info->cleaner_delayed_iput_mutex);
again = btrfs_clean_one_deleted_snapshot(root);
mutex_unlock(&fs_info->cleaner_mutex);
/*
* The defragger has dealt with the R/O remount and umount,
* needn't do anything special here.
*/
btrfs_run_defrag_inodes(fs_info);
/*
* Acquires fs_info->delete_unused_bgs_mutex to avoid racing
* with relocation (btrfs_relocate_chunk) and relocation
* acquires fs_info->cleaner_mutex (btrfs_relocate_block_group)
* after acquiring fs_info->delete_unused_bgs_mutex. So we
* can't hold, nor need to, fs_info->cleaner_mutex when deleting
* unused block groups.
*/
btrfs_delete_unused_bgs(fs_info);
sleep:
if (!again) {
set_current_state(TASK_INTERRUPTIBLE);
if (!kthread_should_stop())
schedule();
__set_current_state(TASK_RUNNING);
}
} while (!kthread_should_stop());
/*
* Transaction kthread is stopped before us and wakes us up.
* However we might have started a new transaction and COWed some
* tree blocks when deleting unused block groups for example. So
* make sure we commit the transaction we started to have a clean
* shutdown when evicting the btree inode - if it has dirty pages
* when we do the final iput() on it, eviction will trigger a
* writeback for it which will fail with null pointer dereferences
* since work queues and other resources were already released and
* destroyed by the time the iput/eviction/writeback is made.
*/
trans = btrfs_attach_transaction(root);
if (IS_ERR(trans)) {
if (PTR_ERR(trans) != -ENOENT)
btrfs_err(fs_info,
"cleaner transaction attach returned %ld",
PTR_ERR(trans));
} else {
int ret;
ret = btrfs_commit_transaction(trans);
if (ret)
btrfs_err(fs_info,
"cleaner open transaction commit returned %d",
ret);
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Filipe David Borba Manana | 92 | 36.08% | 3 | 16.67% |
| Chris Mason | 71 | 27.84% | 2 | 11.11% |
| Miao Xie | 29 | 11.37% | 4 | 22.22% |
| David Sterba | 19 | 7.45% | 1 | 5.56% |
| Zheng Yan | 13 | 5.10% | 3 | 16.67% |
| Jeff Mahoney | 12 | 4.71% | 2 | 11.11% |
| Zygo Blaxell | 10 | 3.92% | 1 | 5.56% |
| Josef Bacik | 7 | 2.75% | 1 | 5.56% |
| Tejun Heo | 2 | 0.78% | 1 | 5.56% |
| Total | 255 | 100.00% | 18 | 100.00% |
static int transaction_kthread(void *arg)
{
struct btrfs_root *root = arg;
struct btrfs_fs_info *fs_info = root->fs_info;
struct btrfs_trans_handle *trans;
struct btrfs_transaction *cur;
u64 transid;
unsigned long now;
unsigned long delay;
bool cannot_commit;
do {
cannot_commit = false;
delay = HZ * fs_info->commit_interval;
mutex_lock(&fs_info->transaction_kthread_mutex);
spin_lock(&fs_info->trans_lock);
cur = fs_info->running_transaction;
if (!cur) {
spin_unlock(&fs_info->trans_lock);
goto sleep;
}
now = get_seconds();
if (cur->state < TRANS_STATE_BLOCKED &&
(now < cur->start_time ||
now - cur->start_time < fs_info->commit_interval)) {
spin_unlock(&fs_info->trans_lock);
delay = HZ * 5;
goto sleep;
}
transid = cur->transid;
spin_unlock(&fs_info->trans_lock);
/* If the file system is aborted, this will always fail. */
trans = btrfs_attach_transaction(root);
if (IS_ERR(trans)) {
if (PTR_ERR(trans) != -ENOENT)
cannot_commit = true;
goto sleep;
}
if (transid == trans->transid) {
btrfs_commit_transaction(trans);
} else {
btrfs_end_transaction(trans);
}
sleep:
wake_up_process(fs_info->cleaner_kthread);
mutex_unlock(&fs_info->transaction_kthread_mutex);
if (unlikely(test_bit(BTRFS_FS_STATE_ERROR,
&fs_info->fs_state)))
btrfs_cleanup_transaction(fs_info);
set_current_state(TASK_INTERRUPTIBLE);
if (!kthread_should_stop() &&
(!btrfs_transaction_blocked(fs_info) ||
cannot_commit))
schedule_timeout(delay);
__set_current_state(TASK_RUNNING);
} while (!kthread_should_stop());
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 177 | 58.22% | 1 | 8.33% |
| Zheng Yan | 49 | 16.12% | 1 | 8.33% |
| Josef Bacik | 21 | 6.91% | 2 | 16.67% |
| Jeff Mahoney | 17 | 5.59% | 3 | 25.00% |
| Jan Kara | 15 | 4.93% | 1 | 8.33% |
| Miao Xie | 14 | 4.61% | 2 | 16.67% |
| David Sterba | 6 | 1.97% | 1 | 8.33% |
| Tsutomu Itoh | 5 | 1.64% | 1 | 8.33% |
| Total | 304 | 100.00% | 12 | 100.00% |
/*
* this will find the highest generation in the array of
* root backups. The index of the highest array is returned,
* or -1 if we can't find anything.
*
* We check to make sure the array is valid by comparing the
* generation of the latest root in the array with the generation
* in the super block. If they don't match we pitch it.
*/
static int find_newest_super_backup(struct btrfs_fs_info *info, u64 newest_gen)
{
u64 cur;
int newest_index = -1;
struct btrfs_root_backup *root_backup;
int i;
for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) {
root_backup = info->super_copy->super_roots + i;
cur = btrfs_backup_tree_root_gen(root_backup);
if (cur == newest_gen)
newest_index = i;
}
/* check to see if we actually wrapped around */
if (newest_index == BTRFS_NUM_BACKUP_ROOTS - 1) {
root_backup = info->super_copy->super_roots;
cur = btrfs_backup_tree_root_gen(root_backup);
if (cur == newest_gen)
newest_index = 0;
}
return newest_index;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 110 | 98.21% | 6 | 85.71% |
| Josef Bacik | 2 | 1.79% | 1 | 14.29% |
| Total | 112 | 100.00% | 7 | 100.00% |
/*
* find the oldest backup so we know where to store new entries
* in the backup array. This will set the backup_root_index
* field in the fs_info struct
*/
static void find_oldest_super_backup(struct btrfs_fs_info *info,
u64 newest_gen)
{
int newest_index = -1;
newest_index = find_newest_super_backup(info, newest_gen);
/* if there was garbage in there, just move along */
if (newest_index == -1) {
info->backup_root_index = 0;
} else {
info->backup_root_index = (newest_index + 1) % BTRFS_NUM_BACKUP_ROOTS;
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 60 | 100.00% | 1 | 100.00% |
| Total | 60 | 100.00% | 1 | 100.00% |
/*
* copy all the root pointers into the super backup array.
* this will bump the backup pointer by one when it is
* done
*/
static void backup_super_roots(struct btrfs_fs_info *info)
{
int next_backup;
struct btrfs_root_backup *root_backup;
int last_backup;
next_backup = info->backup_root_index;
last_backup = (next_backup + BTRFS_NUM_BACKUP_ROOTS - 1) %
BTRFS_NUM_BACKUP_ROOTS;
/*
* just overwrite the last backup if we're at the same generation
* this happens only at umount
*/
root_backup = info->super_for_commit->super_roots + last_backup;
if (btrfs_backup_tree_root_gen(root_backup) ==
btrfs_header_generation(info->tree_root->node))
next_backup = last_backup;
root_backup = info->super_for_commit->super_roots + next_backup;
/*
* make sure all of our padding and empty slots get zero filled
* regardless of which ones we use today
*/
memset(root_backup, 0, sizeof(*root_backup));
info->backup_root_index = (next_backup + 1) % BTRFS_NUM_BACKUP_ROOTS;
btrfs_set_backup_tree_root(root_backup, info->tree_root->node->start);
btrfs_set_backup_tree_root_gen(root_backup,
btrfs_header_generation(info->tree_root->node));
btrfs_set_backup_tree_root_level(root_backup,
btrfs_header_level(info->tree_root->node));
btrfs_set_backup_chunk_root(root_backup, info->chunk_root->node->start);
btrfs_set_backup_chunk_root_gen(root_backup,
btrfs_header_generation(info->chunk_root->node));
btrfs_set_backup_chunk_root_level(root_backup,
btrfs_header_level(info->chunk_root->node));
btrfs_set_backup_extent_root(root_backup, info->extent_root->node->start);
btrfs_set_backup_extent_root_gen(root_backup,
btrfs_header_generation(info->extent_root->node));
btrfs_set_backup_extent_root_level(root_backup,
btrfs_header_level(info->extent_root->node));
/*
* we might commit during log recovery, which happens before we set
* the fs_root. Make sure it is valid before we fill it in.
*/
if (info->fs_root && info->fs_root->node) {
btrfs_set_backup_fs_root(root_backup,
info->fs_root->node->start);
btrfs_set_backup_fs_root_gen(root_backup,
btrfs_header_generation(info->fs_root->node));
btrfs_set_backup_fs_root_level(root_backup,
btrfs_header_level(info->fs_root->node));
}
btrfs_set_backup_dev_root(root_backup, info->dev_root->node->start);
btrfs_set_backup_dev_root_gen(root_backup,
btrfs_header_generation(info->dev_root->node));
btrfs_set_backup_dev_root_level(root_backup,
btrfs_header_level(info->dev_root->node));
btrfs_set_backup_csum_root(root_backup, info->csum_root->node->start);
btrfs_set_backup_csum_root_gen(root_backup,
btrfs_header_generation(info->csum_root->node));
btrfs_set_backup_csum_root_level(root_backup,
btrfs_header_level(info->csum_root->node));
btrfs_set_backup_total_bytes(root_backup,
btrfs_super_total_bytes(info->super_copy));
btrfs_set_backup_bytes_used(root_backup,
btrfs_super_bytes_used(info->super_copy));
btrfs_set_backup_num_devices(root_backup,
btrfs_super_num_devices(info->super_copy));
/*
* if we don't copy this out to the super_copy, it won't get remembered
* for the next commit
*/
memcpy(&info->super_copy->super_roots,
&info->super_for_commit->super_roots,
sizeof(*root_backup) * BTRFS_NUM_BACKUP_ROOTS);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 430 | 100.00% | 2 | 100.00% |
| Total | 430 | 100.00% | 2 | 100.00% |
/*
* this copies info out of the root backup array and back into
* the in-memory super block. It is meant to help iterate through
* the array, so you send it the number of backups you've already
* tried and the last backup index you used.
*
* this returns -1 when it has tried all the backups
*/
static noinline int next_root_backup(struct btrfs_fs_info *info,
struct btrfs_super_block *super,
int *num_backups_tried, int *backup_index)
{
struct btrfs_root_backup *root_backup;
int newest = *backup_index;
if (*num_backups_tried == 0) {
u64 gen = btrfs_super_generation(super);
newest = find_newest_super_backup(info, gen);
if (newest == -1)
return -1;
*backup_index = newest;
*num_backups_tried = 1;
} else if (*num_backups_tried == BTRFS_NUM_BACKUP_ROOTS) {
/* we've tried all the backups, all done */
return -1;
} else {
/* jump to the next oldest backup */
newest = (*backup_index + BTRFS_NUM_BACKUP_ROOTS - 1) %
BTRFS_NUM_BACKUP_ROOTS;
*backup_index = newest;
*num_backups_tried += 1;
}
root_backup = super->super_roots + newest;
btrfs_set_super_generation(super,
btrfs_backup_tree_root_gen(root_backup));
btrfs_set_super_root(super, btrfs_backup_tree_root(root_backup));
btrfs_set_super_root_level(super,
btrfs_backup_tree_root_level(root_backup));
btrfs_set_super_bytes_used(super, btrfs_backup_bytes_used(root_backup));
/*
* fixme: the total bytes and num_devices need to match or we should
* need a fsck
*/
btrfs_set_super_total_bytes(super, btrfs_backup_total_bytes(root_backup));
btrfs_set_super_num_devices(super, btrfs_backup_num_devices(root_backup));
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 197 | 100.00% | 1 | 100.00% |
| Total | 197 | 100.00% | 1 | 100.00% |
/* helper to cleanup workers */
static void btrfs_stop_all_workers(struct btrfs_fs_info *fs_info)
{
btrfs_destroy_workqueue(fs_info->fixup_workers);
btrfs_destroy_workqueue(fs_info->delalloc_workers);
btrfs_destroy_workqueue(fs_info->workers);
btrfs_destroy_workqueue(fs_info->endio_workers);
btrfs_destroy_workqueue(fs_info->endio_raid56_workers);
btrfs_destroy_workqueue(fs_info->endio_repair_workers);
btrfs_destroy_workqueue(fs_info->rmw_workers);
btrfs_destroy_workqueue(fs_info->endio_write_workers);
btrfs_destroy_workqueue(fs_info->endio_freespace_worker);
btrfs_destroy_workqueue(fs_info->submit_workers);
btrfs_destroy_workqueue(fs_info->delayed_workers);
btrfs_destroy_workqueue(fs_info->caching_workers);
btrfs_destroy_workqueue(fs_info->readahead_workers);
btrfs_destroy_workqueue(fs_info->flush_workers);
btrfs_destroy_workqueue(fs_info->qgroup_rescan_workers);
btrfs_destroy_workqueue(fs_info->extent_workers);
/*
* Now that all other work queues are destroyed, we can safely destroy
* the queues used for metadata I/O, since tasks from those other work
* queues can do metadata I/O operations.
*/
btrfs_destroy_workqueue(fs_info->endio_meta_workers);
btrfs_destroy_workqueue(fs_info->endio_meta_write_workers);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Liu Bo | 89 | 64.49% | 1 | 6.25% |
| Filipe David Borba Manana | 15 | 10.87% | 1 | 6.25% |
| Qu Wenruo | 14 | 10.14% | 11 | 68.75% |
| Miao Xie | 7 | 5.07% | 1 | 6.25% |
| Chris Mason | 7 | 5.07% | 1 | 6.25% |
| Jan Schmidt | 6 | 4.35% | 1 | 6.25% |
| Total | 138 | 100.00% | 16 | 100.00% |
static void free_root_extent_buffers(struct btrfs_root *root)
{
if (root) {
free_extent_buffer(root->node);
free_extent_buffer(root->commit_root);
root->node = NULL;
root->commit_root = NULL;
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 25 | 58.14% | 1 | 33.33% |
| Rashika Kheria | 9 | 20.93% | 1 | 33.33% |
| Josef Bacik | 9 | 20.93% | 1 | 33.33% |
| Total | 43 | 100.00% | 3 | 100.00% |
/* helper to cleanup tree roots */
static void free_root_pointers(struct btrfs_fs_info *info, int chunk_root)
{
free_root_extent_buffers(info->tree_root);
free_root_extent_buffers(info->dev_root);
free_root_extent_buffers(info->extent_root);
free_root_extent_buffers(info->csum_root);
free_root_extent_buffers(info->quota_root);
free_root_extent_buffers(info->uuid_root);
if (chunk_root)
free_root_extent_buffers(info->chunk_root);
free_root_extent_buffers(info->free_space_root);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Rashika Kheria | 21 | 28.38% | 1 | 12.50% |
| Chris Mason | 14 | 18.92% | 2 | 25.00% |
| Josef Bacik | 14 | 18.92% | 1 | 12.50% |
| Arne Jansen | 12 | 16.22% | 1 | 12.50% |
| Omar Sandoval | 7 | 9.46% | 1 | 12.50% |
| Stefan Behrens | 5 | 6.76% | 1 | 12.50% |
| Zheng Yan | 1 | 1.35% | 1 | 12.50% |
| Total | 74 | 100.00% | 8 | 100.00% |
void btrfs_free_fs_roots(struct btrfs_fs_info *fs_info)
{
int ret;
struct btrfs_root *gang[8];
int i;
while (!list_empty(&fs_info->dead_roots)) {
gang[0] = list_entry(fs_info->dead_roots.next,
struct btrfs_root, root_list);
list_del(&gang[0]->root_list);
if (test_bit(BTRFS_ROOT_IN_RADIX, &gang[0]->state)) {
btrfs_drop_and_free_fs_root(fs_info, gang[0]);
} else {
free_extent_buffer(gang[0]->node);
free_extent_buffer(gang[0]->commit_root);
btrfs_put_fs_root(gang[0]);
}
}
while (1) {
ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix,
(void **)gang, 0,
ARRAY_SIZE(gang));
if (!ret)
break;
for (i = 0; i < ret; i++)
btrfs_drop_and_free_fs_root(fs_info, gang[i]);
}
if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) {
btrfs_free_log_root_tree(NULL, fs_info);
btrfs_destroy_pinned_extent(fs_info, fs_info->pinned_extents);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Josef Bacik | 174 | 81.31% | 2 | 33.33% |
| Liu Bo | 30 | 14.02% | 1 | 16.67% |
| Miao Xie | 10 | 4.67% | 3 | 50.00% |
| Total | 214 | 100.00% | 6 | 100.00% |
static void btrfs_init_scrub(struct btrfs_fs_info *fs_info)
{
mutex_init(&fs_info->scrub_lock);
atomic_set(&fs_info->scrubs_running, 0);
atomic_set(&fs_info->scrub_pause_req, 0);
atomic_set(&fs_info->scrubs_paused, 0);
atomic_set(&fs_info->scrub_cancel_req, 0);
init_waitqueue_head(&fs_info->scrub_pause_wait);
fs_info->scrub_workers_refcnt = 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Eric Sandeen | 36 | 49.32% | 1 | 12.50% |
| Zheng Yan | 14 | 19.18% | 1 | 12.50% |
| Miao Xie | 9 | 12.33% | 1 | 12.50% |
| Ilya Dryomov | 7 | 9.59% | 1 | 12.50% |
| Chris Mason | 4 | 5.48% | 2 | 25.00% |
| Al Viro | 3 | 4.11% | 2 | 25.00% |
| Total | 73 | 100.00% | 8 | 100.00% |
static void btrfs_init_balance(struct btrfs_fs_info *fs_info)
{
spin_lock_init(&fs_info->balance_lock);
mutex_init(&fs_info->balance_mutex);
atomic_set(&fs_info->balance_running, 0);
atomic_set(&fs_info->balance_pause_req, 0);
atomic_set(&fs_info->balance_cancel_req, 0);
fs_info->balance_ctl = NULL;
init_waitqueue_head(&fs_info->balance_wait_q);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Eric Sandeen | 46 | 64.79% | 1 | 20.00% |
| Miao Xie | 24 | 33.80% | 3 | 60.00% |
| Tejun Heo | 1 | 1.41% | 1 | 20.00% |
| Total | 71 | 100.00% | 5 | 100.00% |
static void btrfs_init_btree_inode(struct btrfs_fs_info *fs_info)
{
struct inode *inode = fs_info->btree_inode;
inode->i_ino = BTRFS_BTREE_INODE_OBJECTID;
set_nlink(inode, 1);
/*
* we set the i_size on the btree inode to the max possible int.
* the real end of the address space is determined by all of
* the devices in the system
*/
inode->i_size = OFFSET_MAX;
inode->i_mapping->a_ops = &btree_aops;
RB_CLEAR_NODE(&BTRFS_I(inode)->rb_node);
extent_io_tree_init(&BTRFS_I(inode)->io_tree, inode->i_mapping);
BTRFS_I(inode)->io_tree.track_uptodate = 0;
extent_map_tree_init(&BTRFS_I(inode)->extent_tree);
BTRFS_I(inode)->io_tree.ops = &btree_extent_io_ops;
BTRFS_I(inode)->root = fs_info->tree_root;
memset(&BTRFS_I(inode)->location, 0, sizeof(struct btrfs_key));
set_bit(BTRFS_INODE_DUMMY, &BTRFS_I(inode)->runtime_flags);
btrfs_insert_inode_hash(inode);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Eric Sandeen | 84 | 53.50% | 1 | 5.00% |
| Jeff Mahoney | 22 | 14.01% | 2 | 10.00% |
| Chris Mason | 21 | 13.38% | 9 | 45.00% |
| Zheng Yan | 18 | 11.46% | 4 | 20.00% |
| Josef Bacik | 6 | 3.82% | 2 | 10.00% |
| Miao Xie | 3 | 1.91% | 1 | 5.00% |
| Jan Schmidt | 3 | 1.91% | 1 | 5.00% |
| Total | 157 | 100.00% | 20 | 100.00% |
static void btrfs_init_dev_replace_locks(struct btrfs_fs_info *fs_info)
{
fs_info->dev_replace.lock_owner = 0;
atomic_set(&fs_info->dev_replace.nesting_level, 0);
mutex_init(&fs_info->dev_replace.lock_finishing_cancel_unmount);
rwlock_init(&fs_info->dev_replace.lock);
atomic_set(&fs_info->dev_replace.read_locks, 0);
atomic_set(&fs_info->dev_replace.blocking_readers, 0);
init_waitqueue_head(&fs_info->replace_wait);
init_waitqueue_head(&fs_info->dev_replace.read_lock_wq);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Eric Sandeen | 32 | 34.41% | 1 | 12.50% |
| Liu Bo | 28 | 30.11% | 1 | 12.50% |
| Josef Bacik | 18 | 19.35% | 3 | 37.50% |
| Filipe David Borba Manana | 6 | 6.45% | 1 | 12.50% |
| Jan Schmidt | 6 | 6.45% | 1 | 12.50% |
| Miao Xie | 3 | 3.23% | 1 | 12.50% |
| Total | 93 | 100.00% | 8 | 100.00% |
static void btrfs_init_qgroup(struct btrfs_fs_info *fs_info)
{
spin_lock_init(&fs_info->qgroup_lock);
mutex_init(&fs_info->qgroup_ioctl_lock);
fs_info->qgroup_tree = RB_ROOT;
fs_info->qgroup_op_tree = RB_ROOT;
INIT_LIST_HEAD(&fs_info->dirty_qgroups);
fs_info->qgroup_seq = 1;
fs_info->qgroup_ulist = NULL;
fs_info->qgroup_rescan_running = false;
mutex_init(&fs_info->qgroup_rescan_lock);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Eric Sandeen | 29 | 39.73% | 1 | 11.11% |
| Chris Mason | 17 | 23.29% | 2 | 22.22% |
| Miao Xie | 10 | 13.70% | 2 | 22.22% |
| Zheng Yan | 6 | 8.22% | 1 | 11.11% |
| Jeff Mahoney | 6 | 8.22% | 1 | 11.11% |
| Josef Bacik | 3 | 4.11% | 1 | 11.11% |
| Jan Schmidt | 2 | 2.74% | 1 | 11.11% |
| Total | 73 | 100.00% | 9 | 100.00% |
static int btrfs_init_workqueues(struct btrfs_fs_info *fs_info,
struct btrfs_fs_devices *fs_devices)
{
int max_active = fs_info->thread_pool_size;
unsigned int flags = WQ_MEM_RECLAIM | WQ_FREEZABLE | WQ_UNBOUND;
fs_info->workers =
btrfs_alloc_workqueue(fs_info, "worker",
flags | WQ_HIGHPRI, max_active, 16);
fs_info->delalloc_workers =
btrfs_alloc_workqueue(fs_info, "delalloc",
flags, max_active, 2);
fs_info->flush_workers =
btrfs_alloc_workqueue(fs_info, "flush_delalloc",
flags, max_active, 0);
fs_info->caching_workers =
btrfs_alloc_workqueue(fs_info, "cache", flags, max_active, 0);
/*
* a higher idle thresh on the submit workers makes it much more
* likely that bios will be send down in a sane order to the
* devices
*/
fs_info->submit_workers =
btrfs_alloc_workqueue(fs_info, "submit", flags,
min_t(u64, fs_devices->num_devices,
max_active), 64);
fs_info->fixup_workers =
btrfs_alloc_workqueue(fs_info, "fixup", flags, 1, 0);
/*
* endios are largely parallel and should have a very
* low idle thresh
*/
fs_info->endio_workers =
btrfs_alloc_workqueue(fs_info, "endio", flags, max_active, 4);
fs_info->endio_meta_workers =
btrfs_alloc_workqueue(fs_info, "endio-meta", flags,
max_active, 4);
fs_info->endio_meta_write_workers =
btrfs_alloc_workqueue(fs_info, "endio-meta-write", flags,
max_active, 2);
fs_info->endio_raid56_workers =
btrfs_alloc_workqueue(fs_info, "endio-raid56", flags,
max_active, 4);
fs_info->endio_repair_workers =
btrfs_alloc_workqueue(fs_info, "endio-repair", flags, 1, 0);
fs_info->rmw_workers =
btrfs_alloc_workqueue(fs_info, "rmw", flags, max_active, 2);
fs_info->endio_write_workers =
btrfs_alloc_workqueue(fs_info, "endio-write", flags,
max_active, 2);
fs_info->endio_freespace_worker =
btrfs_alloc_workqueue(fs_info, "freespace-write", flags,
max_active, 0);
fs_info->delayed_workers =
btrfs_alloc_workqueue(fs_info, "delayed-meta", flags,
max_active, 0);
fs_info->readahead_workers =
btrfs_alloc_workqueue(fs_info, "readahead", flags,
max_active, 2);
fs_info->qgroup_rescan_workers =
btrfs_alloc_workqueue(fs_info, "qgroup-rescan", flags, 1, 0);
fs_info->extent_workers =
btrfs_alloc_workqueue(fs_info, "extent-refs", flags,
min_t(u64, fs_devices->num_devices,
max_active), 8);
if (!(fs_info->workers && fs_info->delalloc_workers &&
fs_info->submit_workers && fs_info->flush_workers &&
fs_info->endio_workers && fs_info->endio_meta_workers &&
fs_info->endio_meta_write_workers &&
fs_info->endio_repair_workers &&
fs_info->endio_write_workers && fs_info->endio_raid56_workers &&
fs_info->endio_freespace_worker && fs_info->rmw_workers &&
fs_info->caching_workers && fs_info->readahead_workers &&
fs_info->fixup_workers && fs_info->delayed_workers &&
fs_info->extent_workers &&
fs_info->qgroup_rescan_workers)) {
return -ENOMEM;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Eric Sandeen | 220 | 49.22% | 1 | 2.33% |
| Chris Mason | 62 | 13.87% | 16 | 37.21% |
| Jeff Mahoney | 36 | 8.05% | 1 | 2.33% |
| Miao Xie | 23 | 5.15% | 4 | 9.30% |
| Arne Jansen | 22 | 4.92% | 2 | 4.65% |
| Ilya Dryomov | 18 | 4.03% | 4 | 9.30% |
| Josef Bacik | 17 | 3.80% | 5 | 11.63% |
| Zheng Yan | 17 | 3.80% | 3 | 6.98% |
| Qu Wenruo | 12 | 2.68% | 1 | 2.33% |
| Jan Schmidt | 10 | 2.24% | 1 | 2.33% |
| David Sterba | 5 | 1.12% | 2 | 4.65% |
| Tejun Heo | 2 | 0.45% | 1 | 2.33% |
| Stefan Behrens | 2 | 0.45% | 1 | 2.33% |
| Al Viro | 1 | 0.22% | 1 | 2.33% |
| Total | 447 | 100.00% | 43 | 100.00% |
static int btrfs_replay_log(struct btrfs_fs_info *fs_info,
struct btrfs_fs_devices *fs_devices)
{
int ret;
struct btrfs_root *log_tree_root;
struct btrfs_super_block *disk_super = fs_info->super_copy;
u64 bytenr = btrfs_super_log_root(disk_super);
if (fs_devices->rw_devices == 0) {
btrfs_warn(fs_info, "log replay required on RO media");
return -EIO;
}
log_tree_root = btrfs_alloc_root(fs_info, GFP_KERNEL);
if (!log_tree_root)
return -ENOMEM;
__setup_root(log_tree_root, fs_info, BTRFS_TREE_LOG_OBJECTID);
log_tree_root->node = read_tree_block(fs_info, bytenr,
fs_info->generation + 1);
if (IS_ERR(log_tree_root->node)) {
btrfs_warn(fs_info, "failed to read log tree");
ret = PTR_ERR(log_tree_root->node);
kfree(log_tree_root);
return ret;
} else if (!extent_buffer_uptodate(log_tree_root->node)) {
btrfs_err(fs_info, "failed to read log tree");
free_extent_buffer(log_tree_root->node);
kfree(log_tree_root);
return -EIO;
}
/* returns with log_tree_root freed on success */
ret = btrfs_recover_log_trees(log_tree_root);
if (ret) {
btrfs_handle_fs_error(fs_info, ret,
"Failed to recover log tree");
free_extent_buffer(log_tree_root->node);
kfree(log_tree_root);
return ret;
}
if (fs_info->sb->s_flags & MS_RDONLY) {
ret = btrfs_commit_super(fs_info);
if (ret)
return ret;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Eric Sandeen | 147 | 60.25% | 1 | 4.35% |
| Liu Bo | 29 | 11.89% | 2 | 8.70% |
| Zheng Yan | 22 | 9.02% | 4 | 17.39% |
| Chris Mason | 19 | 7.79% | 6 | 26.09% |
| David Sterba | 14 | 5.74% | 2 | 8.70% |
| Josef Bacik | 7 | 2.87% | 3 | 13.04% |
| Jeff Mahoney | 2 | 0.82% | 2 | 8.70% |
| Miklos Szeredi | 2 | 0.82% | 1 | 4.35% |
| Miao Xie | 1 | 0.41% | 1 | 4.35% |
| Anand Jain | 1 | 0.41% | 1 | 4.35% |
| Total | 244 | 100.00% | 23 | 100.00% |
static int btrfs_read_roots(struct btrfs_fs_info *fs_info)
{
struct btrfs_root *tree_root = fs_info->tree_root;
struct btrfs_root *root;
struct btrfs_key location;
int ret;
BUG_ON(!fs_info->tree_root);
location.objectid = BTRFS_EXTENT_TREE_OBJECTID;
location.type = BTRFS_ROOT_ITEM_KEY;
location.offset = 0;
root = btrfs_read_tree_root(tree_root, &location);
if (IS_ERR(root))
return PTR_ERR(root);
set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state);
fs_info->extent_root = root;
location.objectid = BTRFS_DEV_TREE_OBJECTID;
root = btrfs_read_tree_root(tree_root, &location);
if (IS_ERR(root))
return PTR_ERR(root);
set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state);
fs_info->dev_root = root;
btrfs_init_devices_late(fs_info);
location.objectid = BTRFS_CSUM_TREE_OBJECTID;
root = btrfs_read_tree_root(tree_root, &location);
if (IS_ERR(root))
return PTR_ERR(root);
set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state);
fs_info->csum_root = root;
location.objectid = BTRFS_QUOTA_TREE_OBJECTID;
root = btrfs_read_tree_root(tree_root, &location);
if (!IS_ERR(root)) {
set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state);
set_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags);
fs_info->quota_root = root;
}
location.objectid = BTRFS_UUID_TREE_OBJECTID;
root = btrfs_read_tree_root(tree_root, &location);
if (IS_ERR(root)) {
ret = PTR_ERR(root);
if (ret != -ENOENT)
return ret;
} else {
set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state);
fs_info->uuid_root = root;
}
if (btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) {
location.objectid = BTRFS_FREE_SPACE_TREE_OBJECTID;
root = btrfs_read_tree_root(tree_root, &location);
if (IS_ERR(root))
return PTR_ERR(root);
set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state);
fs_info->free_space_root = root;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Eric Sandeen | 155 | 42.58% | 1 | 3.12% |
| Omar Sandoval | 56 | 15.38% | 1 | 3.12% |
| Chris Mason | 37 | 10.16% | 13 | 40.62% |
| David Sterba | 27 | 7.42% | 3 | 9.38% |
| Stefan Behrens | 21 | 5.77% | 2 | 6.25% |
| Jeff Mahoney | 15 | 4.12% | 1 | 3.12% |
| Arne Jansen | 12 | 3.30% | 1 | 3.12% |
| David Woodhouse | 10 | 2.75% | 1 | 3.12% |
| Josef Bacik | 10 | 2.75% | 2 | 6.25% |
| Zheng Yan | 8 | 2.20% | 2 | 6.25% |
| Shilong Wang | 5 | 1.37% | 2 | 6.25% |
| Sage Weil | 3 | 0.82% | 1 | 3.12% |
| Dave Young | 3 | 0.82% | 1 | 3.12% |
| Filipe David Borba Manana | 2 | 0.55% | 1 | 3.12% |
| Total | 364 | 100.00% | 32 | 100.00% |
int open_ctree(struct super_block *sb,
struct btrfs_fs_devices *fs_devices,
char *options)
{
u32 sectorsize;
u32 nodesize;
u32 stripesize;
u64 generation;
u64 features;
struct btrfs_key location;
struct buffer_head *bh;
struct btrfs_super_block *disk_super;
struct btrfs_fs_info *fs_info = btrfs_sb(sb);
struct btrfs_root *tree_root;
struct btrfs_root *chunk_root;
int ret;
int err = -EINVAL;
int num_backups_tried = 0;
int backup_index = 0;
int max_active;
int clear_free_space_tree = 0;
tree_root = fs_info->tree_root = btrfs_alloc_root(fs_info, GFP_KERNEL);
chunk_root = fs_info->chunk_root = btrfs_alloc_root(fs_info, GFP_KERNEL);
if (!tree_root || !chunk_root) {
err = -ENOMEM;
goto fail;
}
ret = init_srcu_struct(&fs_info->subvol_srcu);
if (ret) {
err = ret;
goto fail;
}
ret = setup_bdi(fs_info, &fs_info->bdi);
if (ret) {
err = ret;
goto fail_srcu;
}
ret = percpu_counter_init(&fs_info->dirty_metadata_bytes, 0, GFP_KERNEL);
if (ret) {
err = ret;
goto fail_bdi;
}
fs_info->dirty_metadata_batch = PAGE_SIZE *
(1 + ilog2(nr_cpu_ids));
ret = percpu_counter_init(&fs_info->delalloc_bytes, 0, GFP_KERNEL);
if (ret) {
err = ret;
goto fail_dirty_metadata_bytes;
}
ret = percpu_counter_init(&fs_info->bio_counter, 0, GFP_KERNEL);
if (ret) {
err = ret;
goto fail_delalloc_bytes;
}
fs_info->btree_inode = new_inode(sb);
if (!fs_info->btree_inode) {
err = -ENOMEM;
goto fail_bio_counter;
}
mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS);
INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC);
INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC);
INIT_LIST_HEAD(&fs_info->trans_list);
INIT_LIST_HEAD(&fs_info->dead_roots);
INIT_LIST_HEAD(&fs_info->delayed_iputs);
INIT_LIST_HEAD(&fs_info->delalloc_roots);
INIT_LIST_HEAD(&fs_info->caching_block_groups);
spin_lock_init(&fs_info->delalloc_root_lock);
spin_lock_init(&fs_info->trans_lock);
spin_lock_init(&fs_info->fs_roots_radix_lock);
spin_lock_init(&fs_info->delayed_iput_lock);
spin_lock_init(&fs_info->defrag_inodes_lock);
spin_lock_init(&fs_info->free_chunk_lock);
spin_lock_init(&fs_info->tree_mod_seq_lock);
spin_lock_init(&fs_info->super_lock);
spin_lock_init(&fs_info->qgroup_op_lock);
spin_lock_init(&fs_info->buffer_lock);
spin_lock_init(&fs_info->unused_bgs_lock);
rwlock_init(&fs_info->tree_mod_log_lock);
mutex_init(&fs_info->unused_bg_unpin_mutex);
mutex_init(&fs_info->delete_unused_bgs_mutex);
mutex_init(&fs_info->reloc_mutex);
mutex_init(&fs_info->delalloc_root_mutex);
mutex_init(&fs_info->cleaner_delayed_iput_mutex);
seqlock_init(&fs_info->profiles_lock);
INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots);
INIT_LIST_HEAD(&fs_info->space_info);
INIT_LIST_HEAD(&fs_info->tree_mod_seq_list);
INIT_LIST_HEAD(&fs_info->unused_bgs);
btrfs_mapping_init(&fs_info->mapping_tree);
btrfs_init_block_rsv(&fs_info->global_block_rsv,
BTRFS_BLOCK_RSV_GLOBAL);
btrfs_init_block_rsv(&fs_info->delalloc_block_rsv,
BTRFS_BLOCK_RSV_DELALLOC);
btrfs_init_block_rsv(&fs_info->trans_block_rsv, BTRFS_BLOCK_RSV_TRANS);
btrfs_init_block_rsv(&fs_info->chunk_block_rsv, BTRFS_BLOCK_RSV_CHUNK);
btrfs_init_block_rsv(&fs_info->empty_block_rsv, BTRFS_BLOCK_RSV_EMPTY);
btrfs_init_block_rsv(&fs_info->delayed_block_rsv,
BTRFS_BLOCK_RSV_DELOPS);
atomic_set(&fs_info->nr_async_submits, 0);
atomic_set(&fs_info->async_delalloc_pages, 0);
atomic_set(&fs_info->async_submit_draining, 0);
atomic_set(&fs_info->nr_async_bios, 0);
atomic_set(&fs_info->defrag_running, 0);
atomic_set(&fs_info->qgroup_op_seq, 0);
atomic_set(&fs_info->reada_works_cnt, 0);
atomic64_set(&fs_info->tree_mod_seq, 0);
fs_info->fs_frozen = 0;
fs_info->sb = sb;
fs_info->max_inline = BTRFS_DEFAULT_MAX_INLINE;
fs_info->metadata_ratio = 0;
fs_info->defrag_inodes = RB_ROOT;
fs_info->free_chunk_space = 0;
fs_info->tree_mod_log = RB_ROOT;
fs_info->commit_interval = BTRFS_DEFAULT_COMMIT_INTERVAL;
fs_info->avg_delayed_ref_runtime = NSEC_PER_SEC >> 6; /* div by 64 */
/* readahead state */
INIT_RADIX_TREE(&fs_info->reada_tree, GFP_NOFS & ~__GFP_DIRECT_RECLAIM);
spin_lock_init(&fs_info->reada_lock);
fs_info->thread_pool_size = min_t(unsigned long,
num_online_cpus() + 2, 8);
INIT_LIST_HEAD(&fs_info->ordered_roots);
spin_lock_init(&fs_info->ordered_root_lock);
fs_info->delayed_root = kmalloc(sizeof(struct btrfs_delayed_root),
GFP_KERNEL);
if (!fs_info->delayed_root) {
err = -ENOMEM;
goto fail_iput;
}
btrfs_init_delayed_root(fs_info->delayed_root);
btrfs_init_scrub(fs_info);
#ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
fs_info->check_integrity_print_mask = 0;
#endif
btrfs_init_balance(fs_info);
btrfs_init_async_reclaim_work(&fs_info->async_reclaim_work);
sb->s_blocksize = 4096;
sb->s_blocksize_bits = blksize_bits(4096);
sb->s_bdi = &fs_info->bdi;
btrfs_init_btree_inode(fs_info);
spin_lock_init(&fs_info->block_group_cache_lock);
fs_info->block_group_cache_tree = RB_ROOT;
fs_info->first_logical_byte = (u64)-1;
extent_io_tree_init(&fs_info->freed_extents[0],
fs_info->btree_inode->i_mapping);
extent_io_tree_init(&fs_info->freed_extents[1],
fs_info->btree_inode->i_mapping);
fs_info->pinned_extents = &fs_info->freed_extents[0];
set_bit(BTRFS_FS_BARRIER, &fs_info->flags);
mutex_init(&fs_info->ordered_operations_mutex);
mutex_init(&fs_info->tree_log_mutex);
mutex_init(&fs_info->chunk_mutex);
mutex_init(&fs_info->transaction_kthread_mutex);
mutex_init(&fs_info->cleaner_mutex);
mutex_init(&fs_info->volume_mutex);
mutex_init(&fs_info->ro_block_group_mutex);
init_rwsem(&fs_info->commit_root_sem);
init_rwsem(&fs_info->cleanup_work_sem);
init_rwsem(&fs_info->subvol_sem);
sema_init(&fs_info->uuid_tree_rescan_sem, 1);
btrfs_init_dev_replace_locks(fs_info);
btrfs_init_qgroup(fs_info);
btrfs_init_free_cluster(&fs_info->meta_alloc_cluster);
btrfs_init_free_cluster(&fs_info->data_alloc_cluster);
init_waitqueue_head(&fs_info->transaction_throttle);
init_waitqueue_head(&fs_info->transaction_wait);
init_waitqueue_head(&fs_info->transaction_blocked_wait);
init_waitqueue_head(&fs_info->async_submit_wait);
INIT_LIST_HEAD(&fs_info->pinned_chunks);
/* Usable values until the real ones are cached from the superblock */
fs_info->nodesize = 4096;
fs_info->sectorsize = 4096;
fs_info->stripesize = 4096;
ret = btrfs_alloc_stripe_hash_table(fs_info);
if (ret) {
err = ret;
goto fail_alloc;
}
__setup_root(tree_root, fs_info, BTRFS_ROOT_TREE_OBJECTID);
invalidate_bdev(fs_devices->latest_bdev);
/*
* Read super block and check the signature bytes only
*/
bh = btrfs_read_dev_super(fs_devices->latest_bdev);
if (IS_ERR(bh)) {
err = PTR_ERR(bh);
goto fail_alloc;
}
/*
* We want to check superblock checksum, the type is stored inside.
* Pass the whole disk block of size BTRFS_SUPER_INFO_SIZE (4k).
*/
if (btrfs_check_super_csum(fs_info, bh->b_data)) {
btrfs_err(fs_info, "superblock checksum mismatch");
err = -EINVAL;
brelse(bh);
goto fail_alloc;
}
/*
* super_copy is zeroed at allocation time and we never touch the
* following bytes up to INFO_SIZE, the checksum is calculated from
* the whole block of INFO_SIZE
*/
memcpy(fs_info->super_copy, bh->b_data, sizeof(*fs_info->super_copy));
memcpy(fs_info->super_for_commit, fs_info->super_copy,
sizeof(*fs_info->super_for_commit));
brelse(bh);
memcpy(fs_info->fsid, fs_info->super_copy->fsid, BTRFS_FSID_SIZE);
ret = btrfs_check_super_valid(fs_info);
if (ret) {
btrfs_err(fs_info, "superblock contains fatal errors");
err = -EINVAL;
goto fail_alloc;
}
disk_super = fs_info->super_copy;
if (!btrfs_super_root(disk_super))
goto fail_alloc;
/* check FS state, whether FS is broken. */
if (btrfs_super_flags(disk_super) & BTRFS_SUPER_FLAG_ERROR)
set_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state);
/*
* run through our array of backup supers and setup
* our ring pointer to the oldest one
*/
generation = btrfs_super_generation(disk_super);
find_oldest_super_backup(fs_info, generation);
/*
* In the long term, we'll store the compression type in the super
* block, and it'll be used for per file compression control.
*/
fs_info->compress_type = BTRFS_COMPRESS_ZLIB;
ret = btrfs_parse_options(fs_info, options, sb->s_flags);
if (ret) {
err = ret;
goto fail_alloc;
}
features = btrfs_super_incompat_flags(disk_super) &
~BTRFS_FEATURE_INCOMPAT_SUPP;
if (features) {
btrfs_err(fs_info,
"cannot mount because of unsupported optional features (%llx)",
features);
err = -EINVAL;
goto fail_alloc;
}
features = btrfs_super_incompat_flags(disk_super);
features |= BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF;
if (fs_info->compress_type == BTRFS_COMPRESS_LZO)
features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO;
if (features & BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA)
btrfs_info(fs_info, "has skinny extents");
/*
* flag our filesystem as having big metadata blocks if
* they are bigger than the page size
*/
if (btrfs_super_nodesize(disk_super) > PAGE_SIZE) {
if (!(features & BTRFS_FEATURE_INCOMPAT_BIG_METADATA))
btrfs_info(fs_info,
"flagging fs with big metadata feature");
features |= BTRFS_FEATURE_INCOMPAT_BIG_METADATA;
}
nodesize = btrfs_super_nodesize(disk_super);
sectorsize = btrfs_super_sectorsize(disk_super);
stripesize = sectorsize;
fs_info->dirty_metadata_batch = nodesize * (1 + ilog2(nr_cpu_ids));
fs_info->delalloc_batch = sectorsize * 512 * (1 + ilog2(nr_cpu_ids));
/* Cache block sizes */
fs_info->nodesize = nodesize;
fs_info->sectorsize = sectorsize;
fs_info->stripesize = stripesize;
/*
* mixed block groups end up with duplicate but slightly offset
* extent buffers for the same range. It leads to corruptions
*/
if ((features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) &&
(sectorsize != nodesize)) {
btrfs_err(fs_info,
"unequal nodesize/sectorsize (%u != %u) are not allowed for mixed block groups",
nodesize, sectorsize);
goto fail_alloc;
}
/*
* Needn't use the lock because there is no other task which will
* update the flag.
*/
btrfs_set_super_incompat_flags(disk_super, features);
features = btrfs_super_compat_ro_flags(disk_super) &
~BTRFS_FEATURE_COMPAT_RO_SUPP;
if (!(sb->s_flags & MS_RDONLY) && features) {
btrfs_err(fs_info,
"cannot mount read-write because of unsupported optional features (%llx)",
features);
err = -EINVAL;
goto fail_alloc;
}
max_active = fs_info->thread_pool_size;
ret = btrfs_init_workqueues(fs_info, fs_devices);
if (ret) {
err = ret;
goto fail_sb_buffer;
}
fs_info->bdi.ra_pages *= btrfs_super_num_devices(disk_super);
fs_info->bdi.ra_pages = max(fs_info->bdi.ra_pages,
SZ_4M / PAGE_SIZE);
sb->s_blocksize = sectorsize;
sb->s_blocksize_bits = blksize_bits(sectorsize);
mutex_lock(&fs_info->chunk_mutex);
ret = btrfs_read_sys_array(fs_info);
mutex_unlock(&fs_info->chunk_mutex);
if (ret) {
btrfs_err(fs_info, "failed to read the system array: %d", ret);
goto fail_sb_buffer;
}
generation = btrfs_super_chunk_root_generation(disk_super);
__setup_root(chunk_root, fs_info, BTRFS_CHUNK_TREE_OBJECTID);
chunk_root->node = read_tree_block(fs_info,
btrfs_super_chunk_root(disk_super),
generation);
if (IS_ERR(chunk_root->node) ||
!extent_buffer_uptodate(chunk_root->node)) {
btrfs_err(fs_info, "failed to read chunk root");
if (!IS_ERR(chunk_root->node))
free_extent_buffer(chunk_root->node);
chunk_root->node = NULL;
goto fail_tree_roots;
}
btrfs_set_root_node(&chunk_root->root_item, chunk_root->node);
chunk_root->commit_root = btrfs_root_node(chunk_root);
read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid,
btrfs_header_chunk_tree_uuid(chunk_root->node), BTRFS_UUID_SIZE);
ret = btrfs_read_chunk_tree(fs_info);
if (ret) {
btrfs_err(fs_info, "failed to read chunk tree: %d", ret);
goto fail_tree_roots;
}
/*
* keep the device that is marked to be the target device for the
* dev_replace procedure
*/
btrfs_close_extra_devices(fs_devices, 0);
if (!fs_devices->latest_bdev) {
btrfs_err(fs_info, "failed to read devices");
goto fail_tree_roots;
}
retry_root_backup:
generation = btrfs_super_generation(disk_super);
tree_root->node = read_tree_block(fs_info,
btrfs_super_root(disk_super),
generation);
if (IS_ERR(tree_root->node) ||
!extent_buffer_uptodate(tree_root->node)) {
btrfs_warn(fs_info, "failed to read tree root");
if (!IS_ERR(tree_root->node))
free_extent_buffer(tree_root->node);
tree_root->node = NULL;
goto recovery_tree_root;
}
btrfs_set_root_node(&tree_root->root_item, tree_root->node);
tree_root->commit_root = btrfs_root_node(tree_root);
btrfs_set_root_refs(&tree_root->root_item, 1);
mutex_lock(&tree_root->objectid_mutex);
ret = btrfs_find_highest_objectid(tree_root,
&tree_root->highest_objectid);
if (ret) {
mutex_unlock(&tree_root->objectid_mutex);
goto recovery_tree_root;
}
ASSERT(tree_root->highest_objectid <= BTRFS_LAST_FREE_OBJECTID);
mutex_unlock(&tree_root->objectid_mutex);
ret = btrfs_read_roots(fs_info);
if (ret)
goto recovery_tree_root;
fs_info->generation = generation;
fs_info->last_trans_committed = generation;
ret = btrfs_recover_balance(fs_info);
if (ret) {
btrfs_err(fs_info, "failed to recover balance: %d", ret);
goto fail_block_groups;
}
ret = btrfs_init_dev_stats(fs_info);
if (ret) {
btrfs_err(fs_info, "failed to init dev_stats: %d", ret);
goto fail_block_groups;
}
ret = btrfs_init_dev_replace(fs_info);
if (ret) {
btrfs_err(fs_info, "failed to init dev_replace: %d", ret);
goto fail_block_groups;
}
btrfs_close_extra_devices(fs_devices, 1);
ret = btrfs_sysfs_add_fsid(fs_devices, NULL);
if (ret) {
btrfs_err(fs_info, "failed to init sysfs fsid interface: %d",
ret);
goto fail_block_groups;
}
ret = btrfs_sysfs_add_device(fs_devices);
if (ret) {
btrfs_err(fs_info, "failed to init sysfs device interface: %d",
ret);
goto fail_fsdev_sysfs;
}
ret = btrfs_sysfs_add_mounted(fs_info);
if (ret) {
btrfs_err(fs_info, "failed to init sysfs interface: %d", ret);
goto fail_fsdev_sysfs;
}
ret = btrfs_init_space_info(fs_info);
if (ret) {
btrfs_err(fs_info, "failed to initialize space info: %d", ret);
goto fail_sysfs;
}
ret = btrfs_read_block_groups(fs_info);
if (ret) {
btrfs_err(fs_info, "failed to read block groups: %d", ret);
goto fail_sysfs;
}
fs_info->num_tolerated_disk_barrier_failures =
btrfs_calc_num_tolerated_disk_barrier_failures(fs_info);
if (fs_info->fs_devices->missing_devices >
fs_info->num_tolerated_disk_barrier_failures &&
!(sb->s_flags & MS_RDONLY)) {
btrfs_warn(fs_info,
"missing devices (%llu) exceeds the limit (%d), writeable mount is not allowed",
fs_info->fs_devices->missing_devices,
fs_info->num_tolerated_disk_barrier_failures);
goto fail_sysfs;
}
fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root,
"btrfs-cleaner");
if (IS_ERR(fs_info->cleaner_kthread))
goto fail_sysfs;
fs_info->transaction_kthread = kthread_run(transaction_kthread,
tree_root,
"btrfs-transaction");
if (IS_ERR(fs_info->transaction_kthread))
goto fail_cleaner;
if (!btrfs_test_opt(fs_info, SSD) &&
!btrfs_test_opt(fs_info, NOSSD) &&
!fs_info->fs_devices->rotating) {
btrfs_info(fs_info, "detected SSD devices, enabling SSD mode");
btrfs_set_opt(fs_info->mount_opt, SSD);
}
/*
* Mount does not set all options immediately, we can do it now and do
* not have to wait for transaction commit
*/
btrfs_apply_pending_changes(fs_info);
#ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
if (btrfs_test_opt(fs_info, CHECK_INTEGRITY)) {
ret = btrfsic_mount(fs_info, fs_devices,
btrfs_test_opt(fs_info,
CHECK_INTEGRITY_INCLUDING_EXTENT_DATA) ?
1 : 0,
fs_info->check_integrity_print_mask);
if (ret)
btrfs_warn(fs_info,
"failed to initialize integrity check module: %d",
ret);
}
#endif
ret = btrfs_read_qgroup_config(fs_info);
if (ret)
goto fail_trans_kthread;
/* do not make disk changes in broken FS or nologreplay is given */
if (btrfs_super_log_root(disk_super) != 0 &&
!btrfs_test_opt(fs_info, NOLOGREPLAY)) {
ret = btrfs_replay_log(fs_info, fs_devices);
if (ret) {
err = ret;
goto fail_qgroup;
}
}
ret = btrfs_find_orphan_roots(fs_info);
if (ret)
goto fail_qgroup;
if (!(sb->s_flags & MS_RDONLY)) {
ret = btrfs_cleanup_fs_roots(fs_info);
if (ret)
goto fail_qgroup;
mutex_lock(&fs_info->cleaner_mutex);
ret = btrfs_recover_relocation(tree_root);
mutex_unlock(&fs_info->cleaner_mutex);
if (ret < 0) {
btrfs_warn(fs_info, "failed to recover relocation: %d",
ret);
err = -EINVAL;
goto fail_qgroup;
}
}
location.objectid = BTRFS_FS_TREE_OBJECTID;
location.type = BTRFS_ROOT_ITEM_KEY;
location.offset = 0;
fs_info->fs_root = btrfs_read_fs_root_no_name(fs_info, &location);
if (IS_ERR(fs_info->fs_root)) {
err = PTR_ERR(fs_info->fs_root);
goto fail_qgroup;
}
if (sb->s_flags & MS_RDONLY)
return 0;
if (btrfs_test_opt(fs_info, CLEAR_CACHE) &&
btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) {
clear_free_space_tree = 1;
} else if (btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE) &&
!btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE_VALID)) {
btrfs_warn(fs_info, "free space tree is invalid");
clear_free_space_tree = 1;
}
if (clear_free_space_tree) {
btrfs_info(fs_info, "clearing free space tree");
ret = btrfs_clear_free_space_tree(fs_info);
if (ret) {
btrfs_warn(fs_info,
"failed to clear free space tree: %d", ret);
close_ctree(fs_info);
return ret;
}
}
if (btrfs_test_opt(fs_info, FREE_SPACE_TREE) &&
!btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) {
btrfs_info(fs_info, "creating free space tree");
ret = btrfs_create_free_space_tree(fs_info);
if (ret) {
btrfs_warn(fs_info,
"failed to create free space tree: %d", ret);
close_ctree(fs_info);
return ret;
}
}
down_read(&fs_info->cleanup_work_sem);
if ((ret = btrfs_orphan_cleanup(fs_info->fs_root)) ||
(ret = btrfs_orphan_cleanup(fs_info->tree_root))) {
up_read(&fs_info->cleanup_work_sem);
close_ctree(fs_info);
return ret;
}
up_read(&fs_info->cleanup_work_sem);
ret = btrfs_resume_balance_async(fs_info);
if (ret) {
btrfs_warn(fs_info, "failed to resume balance: %d", ret);
close_ctree(fs_info);
return ret;
}
ret = btrfs_resume_dev_replace_async(fs_info);
if (ret) {
btrfs_warn(fs_info, "failed to resume device replace: %d", ret);
close_ctree(fs_info);
return ret;
}
btrfs_qgroup_rescan_resume(fs_info);
if (!fs_info->uuid_root) {
btrfs_info(fs_info, "creating UUID tree");
ret = btrfs_create_uuid_tree(fs_info);
if (ret) {
btrfs_warn(fs_info,
"failed to create the UUID tree: %d", ret);
close_ctree(fs_info);
return ret;
}
} else if (btrfs_test_opt(fs_info, RESCAN_UUID_TREE) ||
fs_info->generation !=
btrfs_super_uuid_tree_generation(disk_super)) {
btrfs_info(fs_info, "checking UUID tree");
ret = btrfs_check_uuid_tree(fs_info);
if (ret) {
btrfs_warn(fs_info,
"failed to check the UUID tree: %d", ret);
close_ctree(fs_info);
return ret;
}
} else {
set_bit(BTRFS_FS_UPDATE_UUID_TREE_GEN, &fs_info->flags);
}
set_bit(BTRFS_FS_OPEN, &fs_info->flags);
/*
* backuproot only affect mount behavior, and if open_ctree succeeded,
* no need to keep the flag
*/
btrfs_clear_opt(fs_info->mount_opt, USEBACKUPROOT);
return 0;
fail_qgroup:
btrfs_free_qgroup_config(fs_info);
fail_trans_kthread:
kthread_stop(fs_info->transaction_kthread);
btrfs_cleanup_transaction(fs_info);
btrfs_free_fs_roots(fs_info);
fail_cleaner:
kthread_stop(fs_info->cleaner_kthread);
/*
* make sure we're done with the btree inode before we stop our
* kthreads
*/
filemap_write_and_wait(fs_info->btree_inode->i_mapping);
fail_sysfs:
btrfs_sysfs_remove_mounted(fs_info);
fail_fsdev_sysfs:
btrfs_sysfs_remove_fsid(fs_info->fs_devices);
fail_block_groups:
btrfs_put_block_group_cache(fs_info);
fail_tree_roots:
free_root_pointers(fs_info, 1);
invalidate_inode_pages2(fs_info->btree_inode->i_mapping);
fail_sb_buffer:
btrfs_stop_all_workers(fs_info);
btrfs_free_block_groups(fs_info);
fail_alloc:
fail_iput:
btrfs_mapping_tree_free(&fs_info->mapping_tree);
iput(fs_info->btree_inode);
fail_bio_counter:
percpu_counter_destroy(&fs_info->bio_counter);
fail_delalloc_bytes:
percpu_counter_destroy(&fs_info->delalloc_bytes);
fail_dirty_metadata_bytes:
percpu_counter_destroy(&fs_info->dirty_metadata_bytes);
fail_bdi:
bdi_destroy(&fs_info->bdi);
fail_srcu:
cleanup_srcu_struct(&fs_info->subvol_srcu);
fail:
btrfs_free_stripe_hash_table(fs_info);
btrfs_close_devices(fs_info->fs_devices);
return err;
recovery_tree_root:
if (!btrfs_test_opt(fs_info, USEBACKUPROOT))
goto fail_tree_roots;
free_root_pointers(fs_info, 0);
/* don't use the log in recovery mode, it won't be valid */
btrfs_set_super_log_root(disk_super, 0);
/* we can't trust the free space cache either */
btrfs_set_opt(fs_info->mount_opt, CLEAR_CACHE);
ret = next_root_backup(fs_info, fs_info->super_copy,
&num_backups_tried, &backup_index);
if (ret == -1)
goto fail_block_groups;
goto retry_root_backup;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 972 | 28.12% | 76 | 31.02% |
| Eric Sandeen | 442 | 12.79% | 8 | 3.27% |
| Stefan Behrens | 294 | 8.50% | 11 | 4.49% |
| Zheng Yan | 235 | 6.80% | 16 | 6.53% |
| David Sterba | 219 | 6.33% | 8 | 3.27% |
| Josef Bacik | 218 | 6.31% | 26 | 10.61% |
| Miao Xie | 184 | 5.32% | 17 | 6.94% |
| Omar Sandoval | 100 | 2.89% | 2 | 0.82% |
| Jeff Mahoney | 93 | 2.69% | 8 | 3.27% |
| Chandan Rajendra | 89 | 2.57% | 3 | 1.22% |
| Ilya Dryomov | 81 | 2.34% | 7 | 2.86% |
| Anand Jain | 78 | 2.26% | 6 | 2.45% |
| David Woodhouse | 66 | 1.91% | 2 | 0.82% |
| Arne Jansen | 59 | 1.71% | 3 | 1.22% |
| Liu Bo | 54 | 1.56% | 7 | 2.86% |
| Qu Wenruo | 45 | 1.30% | 10 | 4.08% |
| Zhao Lei | 42 | 1.21% | 4 | 1.63% |
| Jan Schmidt | 41 | 1.19% | 4 | 1.63% |
| Filipe David Borba Manana | 28 | 0.81% | 6 | 2.45% |
| Dan Carpenter | 22 | 0.64% | 1 | 0.41% |
| Zygo Blaxell | 16 | 0.46% | 1 | 0.41% |
| Qinghuang Feng | 13 | 0.38% | 2 | 0.82% |
| Keith Mannthey | 11 | 0.32% | 1 | 0.41% |
| Jens Axboe | 8 | 0.23% | 2 | 0.82% |
| Christoph Hellwig | 8 | 0.23% | 1 | 0.41% |
| Sage Weil | 8 | 0.23% | 1 | 0.41% |
| Xiaoguang Wang | 6 | 0.17% | 1 | 0.41% |
| Jim Meyering | 6 | 0.17% | 1 | 0.41% |
| Dave Young | 5 | 0.14% | 1 | 0.41% |
| Shilong Wang | 3 | 0.09% | 1 | 0.41% |
| Kirill A. Shutemov | 3 | 0.09% | 1 | 0.41% |
| Li Zefan | 2 | 0.06% | 1 | 0.41% |
| Nicholas D Steeves | 1 | 0.03% | 1 | 0.41% |
| Eric Paris | 1 | 0.03% | 1 | 0.41% |
| Miklos Szeredi | 1 | 0.03% | 1 | 0.41% |
| Mel Gorman | 1 | 0.03% | 1 | 0.41% |
| Byongho Lee | 1 | 0.03% | 1 | 0.41% |
| Al Viro | 1 | 0.03% | 1 | 0.41% |
| Total | 3457 | 100.00% | 245 | 100.00% |
static void btrfs_end_buffer_write_sync(struct buffer_head *bh, int uptodate)
{
if (uptodate) {
set_buffer_uptodate(bh);
} else {
struct btrfs_device *device = (struct btrfs_device *)
bh->b_private;
btrfs_warn_rl_in_rcu(device->fs_info,
"lost page write due to IO error on %s",
rcu_str_deref(device->name));
/* note, we don't set_buffer_write_io_error because we have
* our own ways of dealing with the IO errors
*/
clear_buffer_uptodate(bh);
btrfs_dev_stat_inc_and_print(device, BTRFS_DEV_STAT_WRITE_ERRS);
}
unlock_buffer(bh);
put_bh(bh);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 48 | 59.26% | 2 | 33.33% |
| Stefan Behrens | 23 | 28.40% | 1 | 16.67% |
| David Sterba | 6 | 7.41% | 1 | 16.67% |
| Josef Bacik | 3 | 3.70% | 1 | 16.67% |
| Nicholas D Steeves | 1 | 1.23% | 1 | 16.67% |
| Total | 81 | 100.00% | 6 | 100.00% |
int btrfs_read_dev_one_super(struct block_device *bdev, int copy_num,
struct buffer_head **bh_ret)
{
struct buffer_head *bh;
struct btrfs_super_block *super;
u64 bytenr;
bytenr = btrfs_sb_offset(copy_num);
if (bytenr + BTRFS_SUPER_INFO_SIZE >= i_size_read(bdev->bd_inode))
return -EINVAL;
bh = __bread(bdev, bytenr / 4096, BTRFS_SUPER_INFO_SIZE);
/*
* If we fail to read from the underlying devices, as of now
* the best option we have is to mark it EIO.
*/
if (!bh)
return -EIO;
super = (struct btrfs_super_block *)bh->b_data;
if (btrfs_super_bytenr(super) != bytenr ||
btrfs_super_magic(super) != BTRFS_MAGIC) {
brelse(bh);
return -EINVAL;
}
*bh_ret = bh;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Zheng Yan | 49 | 39.20% | 2 | 14.29% |
| Anand Jain | 36 | 28.80% | 3 | 21.43% |
| Chris Mason | 35 | 28.00% | 7 | 50.00% |
| Qu Wenruo | 3 | 2.40% | 1 | 7.14% |
| Zach Brown | 2 | 1.60% | 1 | 7.14% |
| Total | 125 | 100.00% | 14 | 100.00% |
struct buffer_head *btrfs_read_dev_super(struct block_device *bdev)
{
struct buffer_head *bh;
struct buffer_head *latest = NULL;
struct btrfs_super_block *super;
int i;
u64 transid = 0;
int ret = -EINVAL;
/* 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
*/
for (i = 0; i < 1; i++) {
ret = btrfs_read_dev_one_super(bdev, i, &bh);
if (ret)
continue;
super = (struct btrfs_super_block *)bh->b_data;
if (!latest || btrfs_super_generation(super) > transid) {
brelse(latest);
latest = bh;
transid = btrfs_super_generation(super);
} else {
brelse(bh);
}
}
if (!latest)
return ERR_PTR(ret);
return latest;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Anand Jain | 95 | 68.35% | 2 | 33.33% |
| Zheng Yan | 33 | 23.74% | 1 | 16.67% |
| Chris Mason | 11 | 7.91% | 3 | 50.00% |
| Total | 139 | 100.00% | 6 | 100.00% |
/*
* this should be called twice, once with wait == 0 and
* once with wait == 1. When wait == 0 is done, all the buffer heads
* we write are pinned.
*
* They are released when wait == 1 is done.
* max_mirrors must be the same for both runs, and it indicates how
* many supers on this one device should be written.
*
* max_mirrors == 0 means to write them all.
*/
static int write_dev_supers(struct btrfs_device *device,
struct btrfs_super_block *sb,
int wait, int max_mirrors)
{
struct buffer_head *bh;
int i;
int ret;
int errors = 0;
u32 crc;
u64 bytenr;
if (max_mirrors == 0)
max_mirrors = BTRFS_SUPER_MIRROR_MAX;
for (i = 0; i < max_mirrors; i++) {
bytenr = btrfs_sb_offset(i);
if (bytenr + BTRFS_SUPER_INFO_SIZE >=
device->commit_total_bytes)
break;
if (wait) {
bh = __find_get_block(device->bdev, bytenr / 4096,
BTRFS_SUPER_INFO_SIZE);
if (!bh) {
errors++;
continue;
}
wait_on_buffer(bh);
if (!buffer_uptodate(bh))
errors++;
/* drop our reference */
brelse(bh);
/* drop the reference from the wait == 0 run */
brelse(bh);
continue;
} else {
btrfs_set_super_bytenr(sb, bytenr);
crc = ~(u32)0;
crc = btrfs_csum_data((const char *)sb +
BTRFS_CSUM_SIZE, crc,
BTRFS_SUPER_INFO_SIZE -
BTRFS_CSUM_SIZE);
btrfs_csum_final(crc, sb->csum);
/*
* one reference for us, and we leave it for the
* caller
*/
bh = __getblk(device->bdev, bytenr / 4096,
BTRFS_SUPER_INFO_SIZE);
if (!bh) {
btrfs_err(device->fs_info,
"couldn't get super buffer head for bytenr %llu",
bytenr);
errors++;
continue;
}
memcpy(bh->b_data, sb, BTRFS_SUPER_INFO_SIZE);
/* one reference for submit_bh */
get_bh(bh);
set_buffer_uptodate(bh);
lock_buffer(bh);
bh->b_end_io = btrfs_end_buffer_write_sync;
bh->b_private = device;
}
/*
* we fua the first super. The others we allow
* to go down lazy.
*/
if (i == 0)
ret = btrfsic_submit_bh(REQ_OP_WRITE, REQ_FUA, bh);
else
ret = btrfsic_submit_bh(REQ_OP_WRITE, REQ_SYNC, bh);
if (ret)
errors++;
}
return errors < i ? 0 : -1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Zheng Yan | 180 | 56.43% | 2 | 13.33% |
| Chris Mason | 64 | 20.06% | 3 | 20.00% |
| Josef Bacik | 24 | 7.52% | 1 | 6.67% |
| Hisashi Hifumi | 15 | 4.70% | 1 | 6.67% |
| Shilong Wang | 15 | 4.70% | 1 | 6.67% |
| Stefan Behrens | 7 | 2.19% | 2 | 13.33% |
| David Sterba | 7 | 2.19% | 2 | 13.33% |
| Michael Christie | 4 | 1.25% | 1 | 6.67% |
| Christoph Hellwig | 2 | 0.63% | 1 | 6.67% |
| Miao Xie | 1 | 0.31% | 1 | 6.67% |
| Total | 319 | 100.00% | 15 | 100.00% |
/*
* endio for the write_dev_flush, this will wake anyone waiting
* for the barrier when it is done
*/
static void btrfs_end_empty_barrier(struct bio *bio)
{
if (bio->bi_private)
complete(bio->bi_private);
bio_put(bio);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 28 | 96.55% | 1 | 50.00% |
| Zheng Yan | 1 | 3.45% | 1 | 50.00% |
| Total | 29 | 100.00% | 2 | 100.00% |
/*
* trigger flushes for one the devices. If you pass wait == 0, the flushes are
* sent down. With wait == 1, it waits for the previous flush.
*
* any device where the flush fails with eopnotsupp are flagged as not-barrier
* capable
*/
static int write_dev_flush(struct btrfs_device *device, int wait)
{
struct bio *bio;
int ret = 0;
if (device->nobarriers)
return 0;
if (wait) {
bio = device->flush_bio;
if (!bio)
return 0;
wait_for_completion(&device->flush_wait);
if (bio->bi_error) {
ret = bio->bi_error;
btrfs_dev_stat_inc_and_print(device,
BTRFS_DEV_STAT_FLUSH_ERRS);
}
/* drop the reference from the wait == 0 run */
bio_put(bio);
device->flush_bio = NULL;
return ret;
}
/*
* one reference for us, and we leave it for the
* caller
*/
device->flush_bio = NULL;
bio = btrfs_io_bio_alloc(GFP_NOFS, 0);
if (!bio)
return -ENOMEM;
bio->bi_end_io = btrfs_end_empty_barrier;
bio->bi_bdev = device->bdev;
bio->bi_opf = REQ_OP_WRITE | REQ_PREFLUSH;
init_completion(&device->flush_wait);
bio->bi_private = &device->flush_wait;
device->flush_bio = bio;
bio_get(bio);
btrfsic_submit_bio(bio);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 148 | 82.22% | 2 | 22.22% |
| Zheng Yan | 11 | 6.11% | 1 | 11.11% |
| Christoph Hellwig | 10 | 5.56% | 2 | 22.22% |
| Stefan Behrens | 8 | 4.44% | 2 | 22.22% |
| Michael Christie | 3 | 1.67% | 2 | 22.22% |
| Total | 180 | 100.00% | 9 | 100.00% |
/*
* send an empty flush down to each device in parallel,
* then wait for them
*/
static int barrier_all_devices(struct btrfs_fs_info *info)
{
struct list_head *head;
struct btrfs_device *dev;
int errors_send = 0;
int errors_wait = 0;
int ret;
/* send down all the barriers */
head = &info->fs_devices->devices;
list_for_each_entry_rcu(dev, head, dev_list) {
if (dev->missing)
continue;
if (!dev->bdev) {
errors_send++;
continue;
}
if (!dev->in_fs_metadata || !dev->writeable)
continue;
ret = write_dev_flush(dev, 0);
if (ret)
errors_send++;
}
/* wait for all the barriers */
list_for_each_entry_rcu(dev, head, dev_list) {
if (dev->missing)
continue;
if (!dev->bdev) {
errors_wait++;
continue;
}
if (!dev->in_fs_metadata || !dev->writeable)
continue;
ret = write_dev_flush(dev, 1);
if (ret)
errors_wait++;
}
if (errors_send > info->num_tolerated_disk_barrier_failures ||
errors_wait > info->num_tolerated_disk_barrier_failures)
return -EIO;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 131 | 71.20% | 1 | 25.00% |
| Stefan Behrens | 21 | 11.41% | 1 | 25.00% |
| Zheng Yan | 18 | 9.78% | 1 | 25.00% |
| Hidetoshi Seto | 14 | 7.61% | 1 | 25.00% |
| Total | 184 | 100.00% | 4 | 100.00% |
int btrfs_get_num_tolerated_disk_barrier_failures(u64 flags)
{
int raid_type;
int min_tolerated = INT_MAX;
if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0 ||
(flags & BTRFS_AVAIL_ALLOC_BIT_SINGLE))
min_tolerated = min(min_tolerated,
btrfs_raid_array[BTRFS_RAID_SINGLE].
tolerated_failures);
for (raid_type = 0; raid_type < BTRFS_NR_RAID_TYPES; raid_type++) {
if (raid_type == BTRFS_RAID_SINGLE)
continue;
if (!(flags & btrfs_raid_group[raid_type]))
continue;
min_tolerated = min(min_tolerated,
btrfs_raid_array[raid_type].
tolerated_failures);
}
if (min_tolerated == INT_MAX) {
pr_warn("BTRFS: unknown raid flag: %llu", flags);
min_tolerated = 0;
}
return min_tolerated;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Zhao Lei | 116 | 99.15% | 2 | 66.67% |
| Jeff Mahoney | 1 | 0.85% | 1 | 33.33% |
| Total | 117 | 100.00% | 3 | 100.00% |
int btrfs_calc_num_tolerated_disk_barrier_failures(
struct btrfs_fs_info *fs_info)
{
struct btrfs_ioctl_space_info space;
struct btrfs_space_info *sinfo;
u64 types[] = {BTRFS_BLOCK_GROUP_DATA,
BTRFS_BLOCK_GROUP_SYSTEM,
BTRFS_BLOCK_GROUP_METADATA,
BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA};
int i;
int c;
int num_tolerated_disk_barrier_failures =
(int)fs_info->fs_devices->num_devices;
for (i = 0; i < ARRAY_SIZE(types); i++) {
struct btrfs_space_info *tmp;
sinfo = NULL;
rcu_read_lock();
list_for_each_entry_rcu(tmp, &fs_info->space_info, list) {
if (tmp->flags == types[i]) {
sinfo = tmp;
break;
}
}
rcu_read_unlock();
if (!sinfo)
continue;
down_read(&sinfo->groups_sem);
for (c = 0; c < BTRFS_NR_RAID_TYPES; c++) {
u64 flags;
if (list_empty(&sinfo->block_groups[c]))
continue;
btrfs_get_block_group_info(&sinfo->block_groups[c],
&space);
if (space.total_bytes == 0 || space.used_bytes == 0)
continue;
flags = space.flags;
num_tolerated_disk_barrier_failures = min(
num_tolerated_disk_barrier_failures,
btrfs_get_num_tolerated_disk_barrier_failures(
flags));
}
up_read(&sinfo->groups_sem);
}
return num_tolerated_disk_barrier_failures;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Stefan Behrens | 200 | 91.74% | 1 | 25.00% |
| Zhao Lei | 15 | 6.88% | 2 | 50.00% |
| David Woodhouse | 3 | 1.38% | 1 | 25.00% |
| Total | 218 | 100.00% | 4 | 100.00% |
int write_all_supers(struct btrfs_fs_info *fs_info, int max_mirrors)
{
struct list_head *head;
struct btrfs_device *dev;
struct btrfs_super_block *sb;
struct btrfs_dev_item *dev_item;
int ret;
int do_barriers;
int max_errors;
int total_errors = 0;
u64 flags;
do_barriers = !btrfs_test_opt(fs_info, NOBARRIER);
backup_super_roots(fs_info);
sb = fs_info->super_for_commit;
dev_item = &sb->dev_item;
mutex_lock(&fs_info->fs_devices->device_list_mutex);
head = &fs_info->fs_devices->devices;
max_errors = btrfs_super_num_devices(fs_info->super_copy) - 1;
if (do_barriers) {
ret = barrier_all_devices(fs_info);
if (ret) {
mutex_unlock(
&fs_info->fs_devices->device_list_mutex);
btrfs_handle_fs_error(fs_info, ret,
"errors while submitting device barriers.");
return ret;
}
}
list_for_each_entry_rcu(dev, head, dev_list) {
if (!dev->bdev) {
total_errors++;
continue;
}
if (!dev->in_fs_metadata || !dev->writeable)
continue;
btrfs_set_stack_device_generation(dev_item, 0);
btrfs_set_stack_device_type(dev_item, dev->type);
btrfs_set_stack_device_id(dev_item, dev->devid);
btrfs_set_stack_device_total_bytes(dev_item,
dev->commit_total_bytes);
btrfs_set_stack_device_bytes_used(dev_item,
dev->commit_bytes_used);
btrfs_set_stack_device_io_align(dev_item, dev->io_align);
btrfs_set_stack_device_io_width(dev_item, dev->io_width);
btrfs_set_stack_device_sector_size(dev_item, dev->sector_size);
memcpy(dev_item->uuid, dev->uuid, BTRFS_UUID_SIZE);
memcpy(dev_item->fsid, dev->fs_devices->fsid, BTRFS_UUID_SIZE);
flags = btrfs_super_flags(sb);
btrfs_set_super_flags(sb, flags | BTRFS_HEADER_FLAG_WRITTEN);
ret = write_dev_supers(dev, sb, 0, max_mirrors);
if (ret)
total_errors++;
}
if (total_errors > max_errors) {
btrfs_err(fs_info, "%d errors while writing supers",
total_errors);
mutex_unlock(&fs_info->fs_devices->device_list_mutex);
/* FUA is masked off if unsupported and can't be the reason */
btrfs_handle_fs_error(fs_info, -EIO,
"%d errors while writing supers",
total_errors);
return -EIO;
}
total_errors = 0;
list_for_each_entry_rcu(dev, head, dev_list) {
if (!dev->bdev)
continue;
if (!dev->in_fs_metadata || !dev->writeable)
continue;
ret = write_dev_supers(dev, sb, 1, max_mirrors);
if (ret)
total_errors++;
}
mutex_unlock(&fs_info->fs_devices->device_list_mutex);
if (total_errors > max_errors) {
btrfs_handle_fs_error(fs_info, -EIO,
"%d errors while writing supers",
total_errors);
return -EIO;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Zheng Yan | 190 | 41.76% | 2 | 7.14% |
| Chris Mason | 168 | 36.92% | 13 | 46.43% |
| Stefan Behrens | 56 | 12.31% | 3 | 10.71% |
| Jeff Mahoney | 13 | 2.86% | 3 | 10.71% |
| Filipe David Borba Manana | 11 | 2.42% | 1 | 3.57% |
| Qinghuang Feng | 6 | 1.32% | 1 | 3.57% |
| Frank Holton | 4 | 0.88% | 1 | 3.57% |
| Anand Jain | 3 | 0.66% | 1 | 3.57% |
| Miao Xie | 2 | 0.44% | 2 | 7.14% |
| Xiao Guangrong | 2 | 0.44% | 1 | 3.57% |
| Total | 455 | 100.00% | 28 | 100.00% |
/* Drop a fs root from the radix tree and free it. */
void btrfs_drop_and_free_fs_root(struct btrfs_fs_info *fs_info,
struct btrfs_root *root)
{
spin_lock(&fs_info->fs_roots_radix_lock);
radix_tree_delete(&fs_info->fs_roots_radix,
(unsigned long)root->root_key.objectid);
spin_unlock(&fs_info->fs_roots_radix_lock);
if (btrfs_root_refs(&root->root_item) == 0)
synchronize_srcu(&fs_info->subvol_srcu);
if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) {
btrfs_free_log(NULL, root);
if (root->reloc_root) {
free_extent_buffer(root->reloc_root->node);
free_extent_buffer(root->reloc_root->commit_root);
btrfs_put_fs_root(root->reloc_root);
root->reloc_root = NULL;
}
}
if (root->free_ino_pinned)
__btrfs_remove_free_space_cache(root->free_ino_pinned);
if (root->free_ino_ctl)
__btrfs_remove_free_space_cache(root->free_ino_ctl);
free_fs_root(root);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Liu Bo | 60 | 37.50% | 3 | 27.27% |
| Zheng Yan | 42 | 26.25% | 3 | 27.27% |
| Chris Mason | 30 | 18.75% | 1 | 9.09% |
| Li Zefan | 14 | 8.75% | 1 | 9.09% |
| Josef Bacik | 12 | 7.50% | 1 | 9.09% |
| Jeff Mahoney | 1 | 0.62% | 1 | 9.09% |
| Miao Xie | 1 | 0.62% | 1 | 9.09% |
| Total | 160 | 100.00% | 11 | 100.00% |
static void free_fs_root(struct btrfs_root *root)
{
iput(root->ino_cache_inode);
WARN_ON(!RB_EMPTY_ROOT(&root->inode_tree));
btrfs_free_block_rsv(root->fs_info, root->orphan_block_rsv);
root->orphan_block_rsv = NULL;
if (root->anon_dev)
free_anon_bdev(root->anon_dev);
if (root->subv_writers)
btrfs_free_subvolume_writers(root->subv_writers);
free_extent_buffer(root->node);
free_extent_buffer(root->commit_root);
kfree(root->free_ino_ctl);
kfree(root->free_ino_pinned);
kfree(root->name);
btrfs_put_fs_root(root);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 29 | 25.66% | 4 | 28.57% |
| Zheng Yan | 22 | 19.47% | 1 | 7.14% |
| Li Zefan | 20 | 17.70% | 2 | 14.29% |
| Filipe David Borba Manana | 15 | 13.27% | 1 | 7.14% |
| Miao Xie | 14 | 12.39% | 2 | 14.29% |
| Josef Bacik | 7 | 6.19% | 1 | 7.14% |
| Al Viro | 3 | 2.65% | 1 | 7.14% |
| Jeff Mahoney | 2 | 1.77% | 1 | 7.14% |
| David Sterba | 1 | 0.88% | 1 | 7.14% |
| Total | 113 | 100.00% | 14 | 100.00% |
void btrfs_free_fs_root(struct btrfs_root *root)
{
free_fs_root(root);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Miao Xie | 10 | 66.67% | 1 | 50.00% |
| Chris Mason | 5 | 33.33% | 1 | 50.00% |
| Total | 15 | 100.00% | 2 | 100.00% |
int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info)
{
u64 root_objectid = 0;
struct btrfs_root *gang[8];
int i = 0;
int err = 0;
unsigned int ret = 0;
int index;
while (1) {
index = srcu_read_lock(&fs_info->subvol_srcu);
ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix,
(void **)gang, root_objectid,
ARRAY_SIZE(gang));
if (!ret) {
srcu_read_unlock(&fs_info->subvol_srcu, index);
break;
}
root_objectid = gang[ret - 1]->root_key.objectid + 1;
for (i = 0; i < ret; i++) {
/* Avoid to grab roots in dead_roots */
if (btrfs_root_refs(&gang[i]->root_item) == 0) {
gang[i] = NULL;
continue;
}
/* grab all the search result for later use */
gang[i] = btrfs_grab_fs_root(gang[i]);
}
srcu_read_unlock(&fs_info->subvol_srcu, index);
for (i = 0; i < ret; i++) {
if (!gang[i])
continue;
root_objectid = gang[i]->root_key.objectid;
err = btrfs_orphan_cleanup(gang[i]);
if (err)
break;
btrfs_put_fs_root(gang[i]);
}
root_objectid++;
}
/* release the uncleaned roots due to error */
for (; i < ret; i++) {
if (gang[i])
btrfs_put_fs_root(gang[i]);
}
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Qu Wenruo | 147 | 54.04% | 1 | 9.09% |
| Zheng Yan | 103 | 37.87% | 2 | 18.18% |
| Chris Mason | 16 | 5.88% | 7 | 63.64% |
| Josef Bacik | 6 | 2.21% | 1 | 9.09% |
| Total | 272 | 100.00% | 11 | 100.00% |
int btrfs_commit_super(struct btrfs_fs_info *fs_info)
{
struct btrfs_root *root = fs_info->tree_root;
struct btrfs_trans_handle *trans;
mutex_lock(&fs_info->cleaner_mutex);
btrfs_run_delayed_iputs(fs_info);
mutex_unlock(&fs_info->cleaner_mutex);
wake_up_process(fs_info->cleaner_kthread);
/* wait until ongoing cleanup work done */
down_write(&fs_info->cleanup_work_sem);
up_write(&fs_info->cleanup_work_sem);
trans = btrfs_join_transaction(root);
if (IS_ERR(trans))
return PTR_ERR(trans);
return btrfs_commit_transaction(trans);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Zheng Yan | 45 | 47.37% | 4 | 30.77% |
| Chris Mason | 17 | 17.89% | 5 | 38.46% |
| Tsutomu Itoh | 14 | 14.74% | 1 | 7.69% |
| Jeff Mahoney | 12 | 12.63% | 2 | 15.38% |
| David Sterba | 7 | 7.37% | 1 | 7.69% |
| Total | 95 | 100.00% | 13 | 100.00% |
void close_ctree(struct btrfs_fs_info *fs_info)
{
struct btrfs_root *root = fs_info->tree_root;
int ret;
set_bit(BTRFS_FS_CLOSING_START, &fs_info->flags);
/* wait for the qgroup rescan worker to stop */
btrfs_qgroup_wait_for_completion(fs_info, false);
/* wait for the uuid_scan task to finish */
down(&fs_info->uuid_tree_rescan_sem);
/* avoid complains from lockdep et al., set sem back to initial state */
up(&fs_info->uuid_tree_rescan_sem);
/* pause restriper - we want to resume on mount */
btrfs_pause_balance(fs_info);
btrfs_dev_replace_suspend_for_unmount(fs_info);
btrfs_scrub_cancel(fs_info);
/* wait for any defraggers to finish */
wait_event(fs_info->transaction_wait,
(atomic_read(&fs_info->defrag_running) == 0));
/* clear out the rbtree of defraggable inodes */
btrfs_cleanup_defrag_inodes(fs_info);
cancel_work_sync(&fs_info->async_reclaim_work);
if (!(fs_info->sb->s_flags & MS_RDONLY)) {
/*
* If the cleaner thread is stopped and there are
* block groups queued for removal, the deletion will be
* skipped when we quit the cleaner thread.
*/
btrfs_delete_unused_bgs(fs_info);
ret = btrfs_commit_super(fs_info);
if (ret)
btrfs_err(fs_info, "commit super ret %d", ret);
}
if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state))
btrfs_error_commit_super(fs_info);
kthread_stop(fs_info->transaction_kthread);
kthread_stop(fs_info->cleaner_kthread);
set_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags);
btrfs_free_qgroup_config(fs_info);
if (percpu_counter_sum(&fs_info->delalloc_bytes)) {
btrfs_info(fs_info, "at unmount delalloc count %lld",
percpu_counter_sum(&fs_info->delalloc_bytes));
}
btrfs_sysfs_remove_mounted(fs_info);
btrfs_sysfs_remove_fsid(fs_info->fs_devices);
btrfs_free_fs_roots(fs_info);
btrfs_put_block_group_cache(fs_info);
/*
* we must make sure there is not any read request to
* submit after we stopping all workers.
*/
invalidate_inode_pages2(fs_info->btree_inode->i_mapping);
btrfs_stop_all_workers(fs_info);
btrfs_free_block_groups(fs_info);
clear_bit(BTRFS_FS_OPEN, &fs_info->flags);
free_root_pointers(fs_info, 1);
iput(fs_info->btree_inode);
#ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
if (btrfs_test_opt(fs_info, CHECK_INTEGRITY))
btrfsic_unmount(fs_info->fs_devices);
#endif
btrfs_close_devices(fs_info->fs_devices);
btrfs_mapping_tree_free(&fs_info->mapping_tree);
percpu_counter_destroy(&fs_info->dirty_metadata_bytes);
percpu_counter_destroy(&fs_info->delalloc_bytes);
percpu_counter_destroy(&fs_info->bio_counter);
bdi_destroy(&fs_info->bdi);
cleanup_srcu_struct(&fs_info->subvol_srcu);
btrfs_free_stripe_hash_table(fs_info);
__btrfs_free_block_rsv(root->orphan_block_rsv);
root->orphan_block_rsv = NULL;
mutex_lock(&fs_info->chunk_mutex);
while (!list_empty(&fs_info->pinned_chunks)) {
struct extent_map *em;
em = list_first_entry(&fs_info->pinned_chunks,
struct extent_map, list);
list_del_init(&em->list);
free_extent_map(em);
}
mutex_unlock(&fs_info->chunk_mutex);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 75 | 16.89% | 12 | 21.82% |
| Zheng Yan | 72 | 16.22% | 4 | 7.27% |
| Filipe David Borba Manana | 69 | 15.54% | 3 | 5.45% |
| Miao Xie | 49 | 11.04% | 7 | 12.73% |
| Stefan Behrens | 41 | 9.23% | 4 | 7.27% |
| Josef Bacik | 32 | 7.21% | 5 | 9.09% |
| Jeff Mahoney | 23 | 5.18% | 7 | 12.73% |
| Liu Bo | 15 | 3.38% | 2 | 3.64% |
| Arne Jansen | 13 | 2.93% | 2 | 3.64% |
| Shilong Wang | 10 | 2.25% | 1 | 1.82% |
| David Sterba | 9 | 2.03% | 2 | 3.64% |
| Ilya Dryomov | 9 | 2.03% | 1 | 1.82% |
| Anand Jain | 8 | 1.80% | 2 | 3.64% |
| Frank Holton | 8 | 1.80% | 1 | 1.82% |
| Justin Maggard | 6 | 1.35% | 1 | 1.82% |
| David Woodhouse | 5 | 1.13% | 1 | 1.82% |
| Total | 444 | 100.00% | 55 | 100.00% |
int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid,
int atomic)
{
int ret;
struct inode *btree_inode = buf->pages[0]->mapping->host;
ret = extent_buffer_uptodate(buf);
if (!ret)
return ret;
ret = verify_parent_transid(&BTRFS_I(btree_inode)->io_tree, buf,
parent_transid, atomic);
if (ret == -EAGAIN)
return ret;
return !ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 83 | 100.00% | 4 | 100.00% |
| Total | 83 | 100.00% | 4 | 100.00% |
void btrfs_mark_buffer_dirty(struct extent_buffer *buf)
{
struct btrfs_fs_info *fs_info;
struct btrfs_root *root;
u64 transid = btrfs_header_generation(buf);
int was_dirty;
#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
/*
* This is a fast path so only do this check if we have sanity tests
* enabled. Normal people shouldn't be marking dummy buffers as dirty
* outside of the sanity tests.
*/
if (unlikely(test_bit(EXTENT_BUFFER_DUMMY, &buf->bflags)))
return;
#endif
root = BTRFS_I(buf->pages[0]->mapping->host)->root;
fs_info = root->fs_info;
btrfs_assert_tree_locked(buf);
if (transid != fs_info->generation)
WARN(1, KERN_CRIT "btrfs transid mismatch buffer %llu, found %llu running %llu\n",
buf->start, transid, fs_info->generation);
was_dirty = set_extent_buffer_dirty(buf);
if (!was_dirty)
__percpu_counter_add(&fs_info->dirty_metadata_bytes,
buf->len,
fs_info->dirty_metadata_batch);
#ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
if (btrfs_header_level(buf) == 0 && check_leaf(root, buf)) {
btrfs_print_leaf(fs_info, buf);
ASSERT(0);
}
#endif
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 81 | 47.37% | 8 | 53.33% |
| Josef Bacik | 36 | 21.05% | 1 | 6.67% |
| Filipe David Borba Manana | 34 | 19.88% | 1 | 6.67% |
| Jeff Mahoney | 13 | 7.60% | 3 | 20.00% |
| Miao Xie | 4 | 2.34% | 1 | 6.67% |
| Julia Lawall | 3 | 1.75% | 1 | 6.67% |
| Total | 171 | 100.00% | 15 | 100.00% |
static void __btrfs_btree_balance_dirty(struct btrfs_fs_info *fs_info,
int flush_delayed)
{
/*
* looks as though older kernels can get into trouble with
* this code, they end up stuck in balance_dirty_pages forever
*/
int ret;
if (current->flags & PF_MEMALLOC)
return;
if (flush_delayed)
btrfs_balance_delayed_items(fs_info);
ret = percpu_counter_compare(&fs_info->dirty_metadata_bytes,
BTRFS_DIRTY_METADATA_THRESH);
if (ret > 0) {
balance_dirty_pages_ratelimited(fs_info->btree_inode->i_mapping);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Miao Xie | 35 | 53.85% | 2 | 20.00% |
| Chris Mason | 18 | 27.69% | 5 | 50.00% |
| Liu Bo | 8 | 12.31% | 1 | 10.00% |
| Jeff Mahoney | 3 | 4.62% | 1 | 10.00% |
| Namjae Jeon | 1 | 1.54% | 1 | 10.00% |
| Total | 65 | 100.00% | 10 | 100.00% |
void btrfs_btree_balance_dirty(struct btrfs_fs_info *fs_info)
{
__btrfs_btree_balance_dirty(fs_info, 1);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Liu Bo | 7 | 41.18% | 1 | 25.00% |
| Miao Xie | 6 | 35.29% | 1 | 25.00% |
| Jeff Mahoney | 3 | 17.65% | 1 | 25.00% |
| Chris Mason | 1 | 5.88% | 1 | 25.00% |
| Total | 17 | 100.00% | 4 | 100.00% |
void btrfs_btree_balance_dirty_nodelay(struct btrfs_fs_info *fs_info)
{
__btrfs_btree_balance_dirty(fs_info, 0);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Liu Bo | 8 | 47.06% | 1 | 20.00% |
| Chris Mason | 6 | 35.29% | 3 | 60.00% |
| Jeff Mahoney | 3 | 17.65% | 1 | 20.00% |
| Total | 17 | 100.00% | 5 | 100.00% |
int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid)
{
struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root;
struct btrfs_fs_info *fs_info = root->fs_info;
return btree_read_extent_buffer_pages(fs_info, buf, parent_transid);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 42 | 79.25% | 4 | 66.67% |
| Jeff Mahoney | 10 | 18.87% | 1 | 16.67% |
| Josef Bacik | 1 | 1.89% | 1 | 16.67% |
| Total | 53 | 100.00% | 6 | 100.00% |
static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info)
{
struct btrfs_super_block *sb = fs_info->super_copy;
u64 nodesize = btrfs_super_nodesize(sb);
u64 sectorsize = btrfs_super_sectorsize(sb);
int ret = 0;
if (btrfs_super_magic(sb) != BTRFS_MAGIC) {
btrfs_err(fs_info, "no valid FS found");
ret = -EINVAL;
}
if (btrfs_super_flags(sb) & ~BTRFS_SUPER_FLAG_SUPP)
btrfs_warn(fs_info, "unrecognized super flag: %llu",
btrfs_super_flags(sb) & ~BTRFS_SUPER_FLAG_SUPP);
if (btrfs_super_root_level(sb) >= BTRFS_MAX_LEVEL) {
btrfs_err(fs_info, "tree_root level too big: %d >= %d",
btrfs_super_root_level(sb), BTRFS_MAX_LEVEL);
ret = -EINVAL;
}
if (btrfs_super_chunk_root_level(sb) >= BTRFS_MAX_LEVEL) {
btrfs_err(fs_info, "chunk_root level too big: %d >= %d",
btrfs_super_chunk_root_level(sb), BTRFS_MAX_LEVEL);
ret = -EINVAL;
}
if (btrfs_super_log_root_level(sb) >= BTRFS_MAX_LEVEL) {
btrfs_err(fs_info, "log_root level too big: %d >= %d",
btrfs_super_log_root_level(sb), BTRFS_MAX_LEVEL);
ret = -EINVAL;
}
/*
* Check sectorsize and nodesize first, other check will need it.
* Check all possible sectorsize(4K, 8K, 16K, 32K, 64K) here.
*/
if (!is_power_of_2(sectorsize) || sectorsize < 4096 ||
sectorsize > BTRFS_MAX_METADATA_BLOCKSIZE) {
btrfs_err(fs_info, "invalid sectorsize %llu", sectorsize);
ret = -EINVAL;
}
/* Only PAGE SIZE is supported yet */
if (sectorsize != PAGE_SIZE) {
btrfs_err(fs_info,
"sectorsize %llu not supported yet, only support %lu",
sectorsize, PAGE_SIZE);
ret = -EINVAL;
}
if (!is_power_of_2(nodesize) || nodesize < sectorsize ||
nodesize > BTRFS_MAX_METADATA_BLOCKSIZE) {
btrfs_err(fs_info, "invalid nodesize %llu", nodesize);
ret = -EINVAL;
}
if (nodesize != le32_to_cpu(sb->__unused_leafsize)) {
btrfs_err(fs_info, "invalid leafsize %u, should be %llu",
le32_to_cpu(sb->__unused_leafsize), nodesize);
ret = -EINVAL;
}
/* Root alignment check */
if (!IS_ALIGNED(btrfs_super_root(sb), sectorsize)) {
btrfs_warn(fs_info, "tree_root block unaligned: %llu",
btrfs_super_root(sb));
ret = -EINVAL;
}
if (!IS_ALIGNED(btrfs_super_chunk_root(sb), sectorsize)) {
btrfs_warn(fs_info, "chunk_root block unaligned: %llu",
btrfs_super_chunk_root(sb));
ret = -EINVAL;
}
if (!IS_ALIGNED(btrfs_super_log_root(sb), sectorsize)) {
btrfs_warn(fs_info, "log_root block unaligned: %llu",
btrfs_super_log_root(sb));
ret = -EINVAL;
}
if (memcmp(fs_info->fsid, sb->dev_item.fsid, BTRFS_UUID_SIZE) != 0) {
btrfs_err(fs_info,
"dev_item UUID does not match fsid: %pU != %pU",
fs_info->fsid, sb->dev_item.fsid);
ret = -EINVAL;
}
/*
* Hint to catch really bogus numbers, bitflips or so, more exact checks are
* done later
*/
if (btrfs_super_bytes_used(sb) < 6 * btrfs_super_nodesize(sb)) {
btrfs_err(fs_info, "bytes_used is too small %llu",
btrfs_super_bytes_used(sb));
ret = -EINVAL;
}
if (!is_power_of_2(btrfs_super_stripesize(sb))) {
btrfs_err(fs_info, "invalid stripesize %u",
btrfs_super_stripesize(sb));
ret = -EINVAL;
}
if (btrfs_super_num_devices(sb) > (1UL << 31))
btrfs_warn(fs_info, "suspicious number of devices: %llu",
btrfs_super_num_devices(sb));
if (btrfs_super_num_devices(sb) == 0) {
btrfs_err(fs_info, "number of devices is 0");
ret = -EINVAL;
}
if (btrfs_super_bytenr(sb) != BTRFS_SUPER_INFO_OFFSET) {
btrfs_err(fs_info, "super offset mismatch %llu != %u",
btrfs_super_bytenr(sb), BTRFS_SUPER_INFO_OFFSET);
ret = -EINVAL;
}
/*
* Obvious sys_chunk_array corruptions, it must hold at least one key
* and one chunk
*/
if (btrfs_super_sys_array_size(sb) > BTRFS_SYSTEM_CHUNK_ARRAY_SIZE) {
btrfs_err(fs_info, "system chunk array too big %u > %u",
btrfs_super_sys_array_size(sb),
BTRFS_SYSTEM_CHUNK_ARRAY_SIZE);
ret = -EINVAL;
}
if (btrfs_super_sys_array_size(sb) < sizeof(struct btrfs_disk_key)
+ sizeof(struct btrfs_chunk)) {
btrfs_err(fs_info, "system chunk array too small %u < %zu",
btrfs_super_sys_array_size(sb),
sizeof(struct btrfs_disk_key)
+ sizeof(struct btrfs_chunk));
ret = -EINVAL;
}
/*
* The generation is a global counter, we'll trust it more than the others
* but it's still possible that it's the one that's wrong.
*/
if (btrfs_super_generation(sb) < btrfs_super_chunk_root_generation(sb))
btrfs_warn(fs_info,
"suspicious: generation < chunk_root_generation: %llu < %llu",
btrfs_super_generation(sb),
btrfs_super_chunk_root_generation(sb));
if (btrfs_super_generation(sb) < btrfs_super_cache_generation(sb)
&& btrfs_super_cache_generation(sb) != (u64)-1)
btrfs_warn(fs_info,
"suspicious: generation < cache_generation: %llu < %llu",
btrfs_super_generation(sb),
btrfs_super_cache_generation(sb));
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Sterba | 423 | 57.24% | 6 | 54.55% |
| Qu Wenruo | 162 | 21.92% | 1 | 9.09% |
| Jeff Mahoney | 80 | 10.83% | 1 | 9.09% |
| Liu Bo | 72 | 9.74% | 2 | 18.18% |
| Kirill A. Shutemov | 2 | 0.27% | 1 | 9.09% |
| Total | 739 | 100.00% | 11 | 100.00% |
static void btrfs_error_commit_super(struct btrfs_fs_info *fs_info)
{
mutex_lock(&fs_info->cleaner_mutex);
btrfs_run_delayed_iputs(fs_info);
mutex_unlock(&fs_info->cleaner_mutex);
down_write(&fs_info->cleanup_work_sem);
up_write(&fs_info->cleanup_work_sem);
/* cleanup FS via transaction */
btrfs_cleanup_transaction(fs_info);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Liu Bo | 48 | 88.89% | 1 | 20.00% |
| Jeff Mahoney | 4 | 7.41% | 2 | 40.00% |
| Stefan Behrens | 1 | 1.85% | 1 | 20.00% |
| Eric Sandeen | 1 | 1.85% | 1 | 20.00% |
| Total | 54 | 100.00% | 5 | 100.00% |
static void btrfs_destroy_ordered_extents(struct btrfs_root *root)
{
struct btrfs_ordered_extent *ordered;
spin_lock(&root->ordered_extent_lock);
/*
* This will just short circuit the ordered completion stuff which will
* make sure the ordered extent gets properly cleaned up.
*/
list_for_each_entry(ordered, &root->ordered_extents,
root_extent_list)
set_bit(BTRFS_ORDERED_IOERR, &ordered->flags);
spin_unlock(&root->ordered_extent_lock);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Liu Bo | 37 | 72.55% | 1 | 25.00% |
| Josef Bacik | 8 | 15.69% | 1 | 25.00% |
| Miao Xie | 5 | 9.80% | 1 | 25.00% |
| Jeff Mahoney | 1 | 1.96% | 1 | 25.00% |
| Total | 51 | 100.00% | 4 | 100.00% |
static void btrfs_destroy_all_ordered_extents(struct btrfs_fs_info *fs_info)
{
struct btrfs_root *root;
struct list_head splice;
INIT_LIST_HEAD(&splice);
spin_lock(&fs_info->ordered_root_lock);
list_splice_init(&fs_info->ordered_roots, &splice);
while (!list_empty(&splice)) {
root = list_first_entry(&splice, struct btrfs_root,
ordered_root);
list_move_tail(&root->ordered_root,
&fs_info->ordered_roots);
spin_unlock(&fs_info->ordered_root_lock);
btrfs_destroy_ordered_extents(root);
cond_resched();
spin_lock(&fs_info->ordered_root_lock);
}
spin_unlock(&fs_info->ordered_root_lock);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Miao Xie | 89 | 78.07% | 1 | 25.00% |
| Liu Bo | 19 | 16.67% | 2 | 50.00% |
| Josef Bacik | 6 | 5.26% | 1 | 25.00% |
| Total | 114 | 100.00% | 4 | 100.00% |
static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
struct btrfs_fs_info *fs_info)
{
struct rb_node *node;
struct btrfs_delayed_ref_root *delayed_refs;
struct btrfs_delayed_ref_node *ref;
int ret = 0;
delayed_refs = &trans->delayed_refs;
spin_lock(&delayed_refs->lock);
if (atomic_read(&delayed_refs->num_entries) == 0) {
spin_unlock(&delayed_refs->lock);
btrfs_info(fs_info, "delayed_refs has NO entry");
return ret;
}
while ((node = rb_first(&delayed_refs->href_root)) != NULL) {
struct btrfs_delayed_ref_head *head;
struct btrfs_delayed_ref_node *tmp;
bool pin_bytes = false;
head = rb_entry(node, struct btrfs_delayed_ref_head,
href_node);
if (!mutex_trylock(&head->mutex)) {
atomic_inc(&head->node.refs);
spin_unlock(&delayed_refs->lock);
mutex_lock(&head->mutex);
mutex_unlock(&head->mutex);
btrfs_put_delayed_ref(&head->node);
spin_lock(&delayed_refs->lock);
continue;
}
spin_lock(&head->lock);
list_for_each_entry_safe_reverse(ref, tmp, &head->ref_list,
list) {
ref->in_tree = 0;
list_del(&ref->list);
if (!list_empty(&ref->add_list))
list_del(&ref->add_list);
atomic_dec(&delayed_refs->num_entries);
btrfs_put_delayed_ref(ref);
}
if (head->must_insert_reserved)
pin_bytes = true;
btrfs_free_delayed_extent_op(head->extent_op);
delayed_refs->num_heads--;
if (head->processing == 0)
delayed_refs->num_heads_ready--;
atomic_dec(&delayed_refs->num_entries);
head->node.in_tree = 0;
rb_erase(&head->href_node, &delayed_refs->href_root);
spin_unlock(&head->lock);
spin_unlock(&delayed_refs->lock);
mutex_unlock(&head->mutex);
if (pin_bytes)
btrfs_pin_extent(fs_info, head->node.bytenr,
head->node.num_bytes, 1);
btrfs_put_delayed_ref(&head->node);
cond_resched();
spin_lock(&delayed_refs->lock);
}
spin_unlock(&delayed_refs->lock);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Josef Bacik | 187 | 46.87% | 6 | 35.29% |
| Liu Bo | 151 | 37.84% | 2 | 11.76% |
| Xiaoguang Wang | 19 | 4.76% | 1 | 5.88% |
| Qu Wenruo | 14 | 3.51% | 1 | 5.88% |
| Jeff Mahoney | 14 | 3.51% | 3 | 17.65% |
| David Sterba | 8 | 2.01% | 1 | 5.88% |
| Frank Holton | 4 | 1.00% | 1 | 5.88% |
| Miao Xie | 1 | 0.25% | 1 | 5.88% |
| Stefan Behrens | 1 | 0.25% | 1 | 5.88% |
| Total | 399 | 100.00% | 17 | 100.00% |
static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root)
{
struct btrfs_inode *btrfs_inode;
struct list_head splice;
INIT_LIST_HEAD(&splice);
spin_lock(&root->delalloc_lock);
list_splice_init(&root->delalloc_inodes, &splice);
while (!list_empty(&splice)) {
btrfs_inode = list_first_entry(&splice, struct btrfs_inode,
delalloc_inodes);
list_del_init(&btrfs_inode->delalloc_inodes);
clear_bit(BTRFS_INODE_IN_DELALLOC_LIST,
&btrfs_inode->runtime_flags);
spin_unlock(&root->delalloc_lock);
btrfs_invalidate_inodes(btrfs_inode->root);
spin_lock(&root->delalloc_lock);
}
spin_unlock(&root->delalloc_lock);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Liu Bo | 81 | 68.64% | 1 | 14.29% |
| Miao Xie | 29 | 24.58% | 4 | 57.14% |
| David Sterba | 7 | 5.93% | 1 | 14.29% |
| Jeff Mahoney | 1 | 0.85% | 1 | 14.29% |
| Total | 118 | 100.00% | 7 | 100.00% |
static void btrfs_destroy_all_delalloc_inodes(struct btrfs_fs_info *fs_info)
{
struct btrfs_root *root;
struct list_head splice;
INIT_LIST_HEAD(&splice);
spin_lock(&fs_info->delalloc_root_lock);
list_splice_init(&fs_info->delalloc_roots, &splice);
while (!list_empty(&splice)) {
root = list_first_entry(&splice, struct btrfs_root,
delalloc_root);
list_del_init(&root->delalloc_root);
root = btrfs_grab_fs_root(root);
BUG_ON(!root);
spin_unlock(&fs_info->delalloc_root_lock);
btrfs_destroy_delalloc_inodes(root);
btrfs_put_fs_root(root);
spin_lock(&fs_info->delalloc_root_lock);
}
spin_unlock(&fs_info->delalloc_root_lock);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Liu Bo | 69 | 55.65% | 1 | 16.67% |
| Miao Xie | 49 | 39.52% | 3 | 50.00% |
| David Sterba | 5 | 4.03% | 1 | 16.67% |
| Jeff Mahoney | 1 | 0.81% | 1 | 16.67% |
| Total | 124 | 100.00% | 6 | 100.00% |
static int btrfs_destroy_marked_extents(struct btrfs_fs_info *fs_info,
struct extent_io_tree *dirty_pages,
int mark)
{
int ret;
struct extent_buffer *eb;
u64 start = 0;
u64 end;
while (1) {
ret = find_first_extent_bit(dirty_pages, start, &start, &end,
mark, NULL);
if (ret)
break;
clear_extent_bits(dirty_pages, start, end, mark);
while (start <= end) {
eb = find_extent_buffer(fs_info, start);
start += fs_info->nodesize;
if (!eb)
continue;
wait_on_extent_buffer_writeback(eb);
if (test_and_clear_bit(EXTENT_BUFFER_DIRTY,
&eb->bflags))
clear_extent_buffer_dirty(eb);
free_extent_buffer_stale(eb);
}
}
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Liu Bo | 116 | 85.93% | 1 | 12.50% |
| Josef Bacik | 13 | 9.63% | 2 | 25.00% |
| Jeff Mahoney | 3 | 2.22% | 2 | 25.00% |
| David Sterba | 2 | 1.48% | 2 | 25.00% |
| Daniel Dressler | 1 | 0.74% | 1 | 12.50% |
| Total | 135 | 100.00% | 8 | 100.00% |
static int btrfs_destroy_pinned_extent(struct btrfs_fs_info *fs_info,
struct extent_io_tree *pinned_extents)
{
struct extent_io_tree *unpin;
u64 start;
u64 end;
int ret;
bool loop = true;
unpin = pinned_extents;
again:
while (1) {
ret = find_first_extent_bit(unpin, 0, &start, &end,
EXTENT_DIRTY, NULL);
if (ret)
break;
clear_extent_dirty(unpin, start, end);
btrfs_error_unpin_extent_range(fs_info, start, end);
cond_resched();
}
if (loop) {
if (unpin == &fs_info->freed_extents[0])
unpin = &fs_info->freed_extents[1];
else
unpin = &fs_info->freed_extents[0];
loop = false;
goto again;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Liu Bo | 136 | 96.45% | 2 | 50.00% |
| Jeff Mahoney | 3 | 2.13% | 1 | 25.00% |
| Josef Bacik | 2 | 1.42% | 1 | 25.00% |
| Total | 141 | 100.00% | 4 | 100.00% |
static void btrfs_cleanup_bg_io(struct btrfs_block_group_cache *cache)
{
struct inode *inode;
inode = cache->io_ctl.inode;
if (inode) {
invalidate_inode_pages2(inode->i_mapping);
BTRFS_I(inode)->generation = 0;
cache->io_ctl.inode = NULL;
iput(inode);
}
btrfs_put_block_group(cache);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Liu Bo | 64 | 100.00% | 1 | 100.00% |
| Total | 64 | 100.00% | 1 | 100.00% |
void btrfs_cleanup_dirty_bgs(struct btrfs_transaction *cur_trans,
struct btrfs_fs_info *fs_info)
{
struct btrfs_block_group_cache *cache;
spin_lock(&cur_trans->dirty_bgs_lock);
while (!list_empty(&cur_trans->dirty_bgs)) {
cache = list_first_entry(&cur_trans->dirty_bgs,
struct btrfs_block_group_cache,
dirty_list);
if (!cache) {
btrfs_err(fs_info, "orphan block group dirty_bgs list");
spin_unlock(&cur_trans->dirty_bgs_lock);
return;
}
if (!list_empty(&cache->io_list)) {
spin_unlock(&cur_trans->dirty_bgs_lock);
list_del_init(&cache->io_list);
btrfs_cleanup_bg_io(cache);
spin_lock(&cur_trans->dirty_bgs_lock);
}
list_del_init(&cache->dirty_list);
spin_lock(&cache->lock);
cache->disk_cache_state = BTRFS_DC_ERROR;
spin_unlock(&cache->lock);
spin_unlock(&cur_trans->dirty_bgs_lock);
btrfs_put_block_group(cache);
spin_lock(&cur_trans->dirty_bgs_lock);
}
spin_unlock(&cur_trans->dirty_bgs_lock);
while (!list_empty(&cur_trans->io_bgs)) {
cache = list_first_entry(&cur_trans->io_bgs,
struct btrfs_block_group_cache,
io_list);
if (!cache) {
btrfs_err(fs_info, "orphan block group on io_bgs list");
return;
}
list_del_init(&cache->io_list);
spin_lock(&cache->lock);
cache->disk_cache_state = BTRFS_DC_ERROR;
spin_unlock(&cache->lock);
btrfs_cleanup_bg_io(cache);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Liu Bo | 256 | 99.22% | 1 | 50.00% |
| Jeff Mahoney | 2 | 0.78% | 1 | 50.00% |
| Total | 258 | 100.00% | 2 | 100.00% |
void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans,
struct btrfs_fs_info *fs_info)
{
btrfs_cleanup_dirty_bgs(cur_trans, fs_info);
ASSERT(list_empty(&cur_trans->dirty_bgs));
ASSERT(list_empty(&cur_trans->io_bgs));
btrfs_destroy_delayed_refs(cur_trans, fs_info);
cur_trans->state = TRANS_STATE_COMMIT_START;
wake_up(&fs_info->transaction_blocked_wait);
cur_trans->state = TRANS_STATE_UNBLOCKED;
wake_up(&fs_info->transaction_wait);
btrfs_destroy_delayed_inodes(fs_info);
btrfs_assert_delayed_root_empty(fs_info);
btrfs_destroy_marked_extents(fs_info, &cur_trans->dirty_pages,
EXTENT_DIRTY);
btrfs_destroy_pinned_extent(fs_info,
fs_info->pinned_extents);
cur_trans->state =TRANS_STATE_COMPLETED;
wake_up(&cur_trans->commit_wait);
/*
memset(cur_trans, 0, sizeof(*cur_trans));
kmem_cache_free(btrfs_transaction_cachep, cur_trans);
*/
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jeff Mahoney | 66 | 52.80% | 4 | 50.00% |
| Liu Bo | 36 | 28.80% | 2 | 25.00% |
| Miao Xie | 23 | 18.40% | 2 | 25.00% |
| Total | 125 | 100.00% | 8 | 100.00% |
static int btrfs_cleanup_transaction(struct btrfs_fs_info *fs_info)
{
struct btrfs_transaction *t;
mutex_lock(&fs_info->transaction_kthread_mutex);
spin_lock(&fs_info->trans_lock);
while (!list_empty(&fs_info->trans_list)) {
t = list_first_entry(&fs_info->trans_list,
struct btrfs_transaction, list);
if (t->state >= TRANS_STATE_COMMIT_START) {
atomic_inc(&t->use_count);
spin_unlock(&fs_info->trans_lock);
btrfs_wait_for_commit(fs_info, t->transid);
btrfs_put_transaction(t);
spin_lock(&fs_info->trans_lock);
continue;
}
if (t == fs_info->running_transaction) {
t->state = TRANS_STATE_COMMIT_DOING;
spin_unlock(&fs_info->trans_lock);
/*
* We wait for 0 num_writers since we don't hold a trans
* handle open currently for this transaction.
*/
wait_event(t->writer_wait,
atomic_read(&t->num_writers) == 0);
} else {
spin_unlock(&fs_info->trans_lock);
}
btrfs_cleanup_one_transaction(t, fs_info);
spin_lock(&fs_info->trans_lock);
if (t == fs_info->running_transaction)
fs_info->running_transaction = NULL;
list_del_init(&t->list);
spin_unlock(&fs_info->trans_lock);
btrfs_put_transaction(t);
trace_btrfs_transaction_commit(fs_info->tree_root);
spin_lock(&fs_info->trans_lock);
}
spin_unlock(&fs_info->trans_lock);
btrfs_destroy_all_ordered_extents(fs_info);
btrfs_destroy_delayed_inodes(fs_info);
btrfs_assert_delayed_root_empty(fs_info);
btrfs_destroy_pinned_extent(fs_info, fs_info->pinned_extents);
btrfs_destroy_all_delalloc_inodes(fs_info);
mutex_unlock(&fs_info->transaction_kthread_mutex);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Josef Bacik | 143 | 52.00% | 5 | 38.46% |
| Liu Bo | 105 | 38.18% | 1 | 7.69% |
| Miao Xie | 16 | 5.82% | 3 | 23.08% |
| Jeff Mahoney | 10 | 3.64% | 3 | 23.08% |
| Eric Sandeen | 1 | 0.36% | 1 | 7.69% |
| Total | 275 | 100.00% | 13 | 100.00% |
static const struct extent_io_ops btree_extent_io_ops = {
/* mandatory callbacks */
.submit_bio_hook = btree_submit_bio_hook,
.readpage_end_io_hook = btree_readpage_end_io_hook,
/* note we're sharing with inode.c for the merge bio hook */
.merge_bio_hook = btrfs_merge_bio_hook,
.readpage_io_failed_hook = btree_io_failed_hook,
/* optional callbacks */
};
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chris Mason | 7068 | 33.35% | 175 | 28.74% |
| Liu Bo | 2016 | 9.51% | 27 | 4.43% |
| Josef Bacik | 1979 | 9.34% | 67 | 11.00% |
| Zheng Yan | 1740 | 8.21% | 26 | 4.27% |
| Miao Xie | 1388 | 6.55% | 42 | 6.90% |
| Eric Sandeen | 1209 | 5.70% | 9 | 1.48% |
| David Sterba | 1119 | 5.28% | 47 | 7.72% |
| Stefan Behrens | 820 | 3.87% | 22 | 3.61% |
| Arne Jansen | 681 | 3.21% | 8 | 1.31% |
| Jeff Mahoney | 670 | 3.16% | 22 | 3.61% |
| Qu Wenruo | 436 | 2.06% | 19 | 3.12% |
| Filipe David Borba Manana | 309 | 1.46% | 15 | 2.46% |
| Anand Jain | 225 | 1.06% | 11 | 1.81% |
| Omar Sandoval | 189 | 0.89% | 3 | 0.49% |
| Zhao Lei | 186 | 0.88% | 8 | 1.31% |
| Chandan Rajendra | 142 | 0.67% | 3 | 0.49% |
| David Woodhouse | 134 | 0.63% | 2 | 0.33% |
| Ilya Dryomov | 115 | 0.54% | 10 | 1.64% |
| Jan Schmidt | 71 | 0.33% | 6 | 0.99% |
| Christoph Hellwig | 68 | 0.32% | 7 | 1.15% |
| Li Zefan | 62 | 0.29% | 4 | 0.66% |
| Tsutomu Itoh | 61 | 0.29% | 5 | 0.82% |
| Al Viro | 47 | 0.22% | 4 | 0.66% |
| Shilong Wang | 39 | 0.18% | 6 | 0.99% |
| Frank Holton | 32 | 0.15% | 1 | 0.16% |
| Rashika Kheria | 31 | 0.15% | 1 | 0.16% |
| Alexander Lyakas | 30 | 0.14% | 2 | 0.33% |
| Zygo Blaxell | 26 | 0.12% | 1 | 0.16% |
| Xiaoguang Wang | 25 | 0.12% | 2 | 0.33% |
| Qinghuang Feng | 22 | 0.10% | 3 | 0.49% |
| Dan Carpenter | 22 | 0.10% | 1 | 0.16% |
| Michael Christie | 20 | 0.09% | 3 | 0.49% |
| Jan Kara | 17 | 0.08% | 2 | 0.33% |
| Hisashi Hifumi | 16 | 0.08% | 1 | 0.16% |
| Daniel Dressler | 15 | 0.07% | 1 | 0.16% |
| Hidetoshi Seto | 14 | 0.07% | 1 | 0.16% |
| Sage Weil | 11 | 0.05% | 1 | 0.16% |
| Keith Mannthey | 11 | 0.05% | 1 | 0.16% |
| Alexander Block | 10 | 0.05% | 1 | 0.16% |
| Tejun Heo | 10 | 0.05% | 3 | 0.49% |
| Jens Axboe | 9 | 0.04% | 3 | 0.49% |
| Dave Young | 8 | 0.04% | 1 | 0.16% |
| Kent Overstreet | 8 | 0.04% | 1 | 0.16% |
| Kirill A. Shutemov | 7 | 0.03% | 1 | 0.16% |
| Mel Gorman | 7 | 0.03% | 3 | 0.49% |
| Jim Meyering | 6 | 0.03% | 1 | 0.16% |
| Xiao Guangrong | 6 | 0.03% | 2 | 0.33% |
| Justin Maggard | 6 | 0.03% | 1 | 0.16% |
| Nicholas D Steeves | 5 | 0.02% | 1 | 0.16% |
| Jan Beulich | 5 | 0.02% | 1 | 0.16% |
| Lukas Czerner | 5 | 0.02% | 1 | 0.16% |
| Yan Zheng | 4 | 0.02% | 1 | 0.16% |
| Borislav Petkov | 4 | 0.02% | 2 | 0.33% |
| Miklos Szeredi | 3 | 0.01% | 1 | 0.16% |
| Dulshani Gunawardhana | 3 | 0.01% | 1 | 0.16% |
| Julia Lawall | 3 | 0.01% | 1 | 0.16% |
| Kelley Nielsen | 3 | 0.01% | 1 | 0.16% |
| Nikolay Borisov | 3 | 0.01% | 1 | 0.16% |
| Eric Paris | 2 | 0.01% | 1 | 0.16% |
| Feifei Xu | 2 | 0.01% | 2 | 0.33% |
| Zach Brown | 2 | 0.01% | 1 | 0.16% |
| Adam Buchbinder | 1 | 0.00% | 1 | 0.16% |
| Mike Snitzer | 1 | 0.00% | 1 | 0.16% |
| Alexey Dobriyan | 1 | 0.00% | 1 | 0.16% |
| Namjae Jeon | 1 | 0.00% | 1 | 0.16% |
| Goldwyn Rodrigues | 1 | 0.00% | 1 | 0.16% |
| Byongho Lee | 1 | 0.00% | 1 | 0.16% |
| Ross Kirk | 1 | 0.00% | 1 | 0.16% |
| Domagoj Tršan | 1 | 0.00% | 1 | 0.16% |
| Total | 21195 | 100.00% | 609 | 100.00% |
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