Release 4.18 block/blk-sysfs.c
// SPDX-License-Identifier: GPL-2.0
/*
* Functions related to sysfs handling
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/bio.h>
#include <linux/blkdev.h>
#include <linux/backing-dev.h>
#include <linux/blktrace_api.h>
#include <linux/blk-mq.h>
#include <linux/blk-cgroup.h>
#include "blk.h"
#include "blk-mq.h"
#include "blk-mq-debugfs.h"
#include "blk-wbt.h"
struct queue_sysfs_entry {
struct attribute attr;
ssize_t (*show)(struct request_queue *, char *);
ssize_t (*store)(struct request_queue *, const char *, size_t);
};
static ssize_t
queue_var_show(unsigned long var, char *page)
{
return sprintf(page, "%lu\n", var);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 22 | 91.67% | 1 | 50.00% |
Xiaotian Feng | 2 | 8.33% | 1 | 50.00% |
Total | 24 | 100.00% | 2 | 100.00% |
static ssize_t
queue_var_store(unsigned long *var, const char *page, size_t count)
{
int err;
unsigned long v;
err = kstrtoul(page, 10, &v);
if (err || v > UINT_MAX)
return -EINVAL;
*var = v;
return count;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 29 | 50.00% | 1 | 33.33% |
Dave Reisner | 28 | 48.28% | 1 | 33.33% |
Jingoo Han | 1 | 1.72% | 1 | 33.33% |
Total | 58 | 100.00% | 3 | 100.00% |
static ssize_t queue_var_store64(s64 *var, const char *page)
{
int err;
s64 v;
err = kstrtos64(page, 10, &v);
if (err < 0)
return err;
*var = v;
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 50 | 100.00% | 2 | 100.00% |
Total | 50 | 100.00% | 2 | 100.00% |
static ssize_t queue_requests_show(struct request_queue *q, char *page)
{
return queue_var_show(q->nr_requests, (page));
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 27 | 100.00% | 1 | 100.00% |
Total | 27 | 100.00% | 1 | 100.00% |
static ssize_t
queue_requests_store(struct request_queue *q, const char *page, size_t count)
{
unsigned long nr;
int ret, err;
if (!q->request_fn && !q->mq_ops)
return -EINVAL;
ret = queue_var_store(&nr, page, count);
if (ret < 0)
return ret;
if (nr < BLKDEV_MIN_RQ)
nr = BLKDEV_MIN_RQ;
if (q->request_fn)
err = blk_update_nr_requests(q, nr);
else
err = blk_mq_update_nr_requests(q, nr);
if (err)
return err;
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 99 | 90.00% | 3 | 50.00% |
Dave Reisner | 9 | 8.18% | 1 | 16.67% |
Tejun Heo | 1 | 0.91% | 1 | 16.67% |
Tao Ma | 1 | 0.91% | 1 | 16.67% |
Total | 110 | 100.00% | 6 | 100.00% |
static ssize_t queue_ra_show(struct request_queue *q, char *page)
{
unsigned long ra_kb = q->backing_dev_info->ra_pages <<
(PAGE_SHIFT - 10);
return queue_var_show(ra_kb, (page));
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 37 | 90.24% | 1 | 25.00% |
Xiaotian Feng | 2 | 4.88% | 1 | 25.00% |
Kirill A. Shutemov | 1 | 2.44% | 1 | 25.00% |
Jan Kara | 1 | 2.44% | 1 | 25.00% |
Total | 41 | 100.00% | 4 | 100.00% |
static ssize_t
queue_ra_store(struct request_queue *q, const char *page, size_t count)
{
unsigned long ra_kb;
ssize_t ret = queue_var_store(&ra_kb, page, count);
if (ret < 0)
return ret;
q->backing_dev_info->ra_pages = ra_kb >> (PAGE_SHIFT - 10);
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 51 | 82.26% | 1 | 25.00% |
Dave Reisner | 9 | 14.52% | 1 | 25.00% |
Kirill A. Shutemov | 1 | 1.61% | 1 | 25.00% |
Jan Kara | 1 | 1.61% | 1 | 25.00% |
Total | 62 | 100.00% | 4 | 100.00% |
static ssize_t queue_max_sectors_show(struct request_queue *q, char *page)
{
int max_sectors_kb = queue_max_sectors(q) >> 1;
return queue_var_show(max_sectors_kb, (page));
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 32 | 91.43% | 1 | 50.00% |
Martin K. Petersen | 3 | 8.57% | 1 | 50.00% |
Total | 35 | 100.00% | 2 | 100.00% |
static ssize_t queue_max_segments_show(struct request_queue *q, char *page)
{
return queue_var_show(queue_max_segments(q), (page));
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin K. Petersen | 28 | 100.00% | 1 | 100.00% |
Total | 28 | 100.00% | 1 | 100.00% |
static ssize_t queue_max_discard_segments_show(struct request_queue *q,
char *page)
{
return queue_var_show(queue_max_discard_segments(q), (page));
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Christoph Hellwig | 28 | 100.00% | 1 | 100.00% |
Total | 28 | 100.00% | 1 | 100.00% |
static ssize_t queue_max_integrity_segments_show(struct request_queue *q, char *page)
{
return queue_var_show(q->limits.max_integrity_segments, (page));
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin K. Petersen | 29 | 100.00% | 1 | 100.00% |
Total | 29 | 100.00% | 1 | 100.00% |
static ssize_t queue_max_segment_size_show(struct request_queue *q, char *page)
{
if (blk_queue_cluster(q))
return queue_var_show(queue_max_segment_size(q), (page));
return queue_var_show(PAGE_SIZE, (page));
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin K. Petersen | 44 | 97.78% | 2 | 66.67% |
Kirill A. Shutemov | 1 | 2.22% | 1 | 33.33% |
Total | 45 | 100.00% | 3 | 100.00% |
static ssize_t queue_logical_block_size_show(struct request_queue *q, char *page)
{
return queue_var_show(queue_logical_block_size(q), page);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin K. Petersen | 26 | 100.00% | 2 | 100.00% |
Total | 26 | 100.00% | 2 | 100.00% |
static ssize_t queue_physical_block_size_show(struct request_queue *q, char *page)
{
return queue_var_show(queue_physical_block_size(q), page);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin K. Petersen | 26 | 100.00% | 1 | 100.00% |
Total | 26 | 100.00% | 1 | 100.00% |
static ssize_t queue_chunk_sectors_show(struct request_queue *q, char *page)
{
return queue_var_show(q->limits.chunk_sectors, page);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Hannes Reinecke | 27 | 100.00% | 1 | 100.00% |
Total | 27 | 100.00% | 1 | 100.00% |
static ssize_t queue_io_min_show(struct request_queue *q, char *page)
{
return queue_var_show(queue_io_min(q), page);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin K. Petersen | 26 | 100.00% | 1 | 100.00% |
Total | 26 | 100.00% | 1 | 100.00% |
static ssize_t queue_io_opt_show(struct request_queue *q, char *page)
{
return queue_var_show(queue_io_opt(q), page);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin K. Petersen | 26 | 100.00% | 2 | 100.00% |
Total | 26 | 100.00% | 2 | 100.00% |
static ssize_t queue_discard_granularity_show(struct request_queue *q, char *page)
{
return queue_var_show(q->limits.discard_granularity, page);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin K. Petersen | 27 | 100.00% | 1 | 100.00% |
Total | 27 | 100.00% | 1 | 100.00% |
static ssize_t queue_discard_max_hw_show(struct request_queue *q, char *page)
{
return sprintf(page, "%llu\n",
(unsigned long long)q->limits.max_hw_discard_sectors << 9);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 27 | 75.00% | 1 | 50.00% |
Alan One Thousand Gnomes | 9 | 25.00% | 1 | 50.00% |
Total | 36 | 100.00% | 2 | 100.00% |
static ssize_t queue_discard_max_show(struct request_queue *q, char *page)
{
return sprintf(page, "%llu\n",
(unsigned long long)q->limits.max_discard_sectors << 9);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin K. Petersen | 36 | 100.00% | 2 | 100.00% |
Total | 36 | 100.00% | 2 | 100.00% |
static ssize_t queue_discard_max_store(struct request_queue *q,
const char *page, size_t count)
{
unsigned long max_discard;
ssize_t ret = queue_var_store(&max_discard, page, count);
if (ret < 0)
return ret;
if (max_discard & (q->limits.discard_granularity - 1))
return -EINVAL;
max_discard >>= 9;
if (max_discard > UINT_MAX)
return -EINVAL;
if (max_discard > q->limits.max_hw_discard_sectors)
max_discard = q->limits.max_hw_discard_sectors;
q->limits.max_discard_sectors = max_discard;
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 106 | 100.00% | 1 | 100.00% |
Total | 106 | 100.00% | 1 | 100.00% |
static ssize_t queue_discard_zeroes_data_show(struct request_queue *q, char *page)
{
return queue_var_show(0, page);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin K. Petersen | 22 | 95.65% | 1 | 50.00% |
Christoph Hellwig | 1 | 4.35% | 1 | 50.00% |
Total | 23 | 100.00% | 2 | 100.00% |
static ssize_t queue_write_same_max_show(struct request_queue *q, char *page)
{
return sprintf(page, "%llu\n",
(unsigned long long)q->limits.max_write_same_sectors << 9);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin K. Petersen | 36 | 100.00% | 1 | 100.00% |
Total | 36 | 100.00% | 1 | 100.00% |
static ssize_t queue_write_zeroes_max_show(struct request_queue *q, char *page)
{
return sprintf(page, "%llu\n",
(unsigned long long)q->limits.max_write_zeroes_sectors << 9);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Chaitanya Kulkarni | 36 | 100.00% | 1 | 100.00% |
Total | 36 | 100.00% | 1 | 100.00% |
static ssize_t
queue_max_sectors_store(struct request_queue *q, const char *page, size_t count)
{
unsigned long max_sectors_kb,
max_hw_sectors_kb = queue_max_hw_sectors(q) >> 1,
page_kb = 1 << (PAGE_SHIFT - 10);
ssize_t ret = queue_var_store(&max_sectors_kb, page, count);
if (ret < 0)
return ret;
max_hw_sectors_kb = min_not_zero(max_hw_sectors_kb, (unsigned long)
q->limits.max_dev_sectors >> 1);
if (max_sectors_kb > max_hw_sectors_kb || max_sectors_kb < page_kb)
return -EINVAL;
spin_lock_irq(q->queue_lock);
q->limits.max_sectors = max_sectors_kb << 1;
q->backing_dev_info->io_pages = max_sectors_kb >> (PAGE_SHIFT - 10);
spin_unlock_irq(q->queue_lock);
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 100 | 72.46% | 2 | 25.00% |
Martin K. Petersen | 22 | 15.94% | 2 | 25.00% |
Dave Reisner | 9 | 6.52% | 1 | 12.50% |
Nikanth Karthikesan | 5 | 3.62% | 1 | 12.50% |
Kirill A. Shutemov | 1 | 0.72% | 1 | 12.50% |
Jan Kara | 1 | 0.72% | 1 | 12.50% |
Total | 138 | 100.00% | 8 | 100.00% |
static ssize_t queue_max_hw_sectors_show(struct request_queue *q, char *page)
{
int max_hw_sectors_kb = queue_max_hw_sectors(q) >> 1;
return queue_var_show(max_hw_sectors_kb, (page));
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 32 | 91.43% | 1 | 50.00% |
Martin K. Petersen | 3 | 8.57% | 1 | 50.00% |
Total | 35 | 100.00% | 2 | 100.00% |
#define QUEUE_SYSFS_BIT_FNS(name, flag, neg) \
static ssize_t \
queue_show_##name(struct request_queue *q, char *page) \
{ \
int bit; \
bit = test_bit(QUEUE_FLAG_##flag, &q->queue_flags); \
return queue_var_show(neg ? !bit : bit, page); \
} \
static ssize_t \
queue_store_##name(struct request_queue *q, const char *page, size_t count) \
{ \
unsigned long val; \
ssize_t ret; \
ret = queue_var_store(&val, page, count); \
if (ret < 0) \
return ret; \
if (neg) \
val = !val; \
\
if (val) \
blk_queue_flag_set(QUEUE_FLAG_##flag, q); \
else \
blk_queue_flag_clear(QUEUE_FLAG_##flag, q); \
return ret; \
}
QUEUE_SYSFS_BIT_FNS(nonrot, NONROT, 1);
QUEUE_SYSFS_BIT_FNS(random, ADD_RANDOM, 0);
QUEUE_SYSFS_BIT_FNS(iostats, IO_STAT, 0);
#undef QUEUE_SYSFS_BIT_FNS
static ssize_t queue_zoned_show(struct request_queue *q, char *page)
{
switch (blk_queue_zoned_model(q)) {
case BLK_ZONED_HA:
return sprintf(page, "host-aware\n");
case BLK_ZONED_HM:
return sprintf(page, "host-managed\n");
default:
return sprintf(page, "none\n");
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Damien Le Moal | 55 | 100.00% | 1 | 100.00% |
Total | 55 | 100.00% | 1 | 100.00% |
static ssize_t queue_nomerges_show(struct request_queue *q, char *page)
{
return queue_var_show((blk_queue_nomerges(q) << 1) |
blk_queue_noxmerges(q), page);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Alan D. Brunelle | 35 | 100.00% | 2 | 100.00% |
Total | 35 | 100.00% | 2 | 100.00% |
static ssize_t queue_nomerges_store(struct request_queue *q, const char *page,
size_t count)
{
unsigned long nm;
ssize_t ret = queue_var_store(&nm, page, count);
if (ret < 0)
return ret;
spin_lock_irq(q->queue_lock);
queue_flag_clear(QUEUE_FLAG_NOMERGES, q);
queue_flag_clear(QUEUE_FLAG_NOXMERGES, q);
if (nm == 2)
queue_flag_set(QUEUE_FLAG_NOMERGES, q);
else if (nm)
queue_flag_set(QUEUE_FLAG_NOXMERGES, q);
spin_unlock_irq(q->queue_lock);
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Alan D. Brunelle | 78 | 77.23% | 2 | 50.00% |
Jens Axboe | 14 | 13.86% | 1 | 25.00% |
Dave Reisner | 9 | 8.91% | 1 | 25.00% |
Total | 101 | 100.00% | 4 | 100.00% |
static ssize_t queue_rq_affinity_show(struct request_queue *q, char *page)
{
bool set = test_bit(QUEUE_FLAG_SAME_COMP, &q->queue_flags);
bool force = test_bit(QUEUE_FLAG_SAME_FORCE, &q->queue_flags);
return queue_var_show(set << force, page);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 35 | 68.63% | 1 | 33.33% |
Dan J Williams | 15 | 29.41% | 1 | 33.33% |
Xiaotian Feng | 1 | 1.96% | 1 | 33.33% |
Total | 51 | 100.00% | 3 | 100.00% |
static ssize_t
queue_rq_affinity_store(struct request_queue *q, const char *page, size_t count)
{
ssize_t ret = -EINVAL;
#ifdef CONFIG_SMP
unsigned long val;
ret = queue_var_store(&val, page, count);
if (ret < 0)
return ret;
spin_lock_irq(q->queue_lock);
if (val == 2) {
queue_flag_set(QUEUE_FLAG_SAME_COMP, q);
queue_flag_set(QUEUE_FLAG_SAME_FORCE, q);
} else if (val == 1) {
queue_flag_set(QUEUE_FLAG_SAME_COMP, q);
queue_flag_clear(QUEUE_FLAG_SAME_FORCE, q);
} else if (val == 0) {
queue_flag_clear(QUEUE_FLAG_SAME_COMP, q);
queue_flag_clear(QUEUE_FLAG_SAME_FORCE, q);
}
spin_unlock_irq(q->queue_lock);
#endif
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 78 | 55.71% | 1 | 20.00% |
Eric Seppanen | 27 | 19.29% | 1 | 20.00% |
Dan J Williams | 23 | 16.43% | 1 | 20.00% |
Dave Reisner | 9 | 6.43% | 1 | 20.00% |
Christoph Hellwig | 3 | 2.14% | 1 | 20.00% |
Total | 140 | 100.00% | 5 | 100.00% |
static ssize_t queue_poll_delay_show(struct request_queue *q, char *page)
{
int val;
if (q->poll_nsec == -1)
val = -1;
else
val = q->poll_nsec / 1000;
return sprintf(page, "%d\n", val);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 51 | 100.00% | 3 | 100.00% |
Total | 51 | 100.00% | 3 | 100.00% |
static ssize_t queue_poll_delay_store(struct request_queue *q, const char *page,
size_t count)
{
int err, val;
if (!q->mq_ops || !q->mq_ops->poll)
return -EINVAL;
err = kstrtoint(page, 10, &val);
if (err < 0)
return err;
if (val == -1)
q->poll_nsec = -1;
else
q->poll_nsec = val * 1000;
return count;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 89 | 100.00% | 3 | 100.00% |
Total | 89 | 100.00% | 3 | 100.00% |
static ssize_t queue_poll_show(struct request_queue *q, char *page)
{
return queue_var_show(test_bit(QUEUE_FLAG_POLL, &q->queue_flags), page);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 31 | 100.00% | 1 | 100.00% |
Total | 31 | 100.00% | 1 | 100.00% |
static ssize_t queue_poll_store(struct request_queue *q, const char *page,
size_t count)
{
unsigned long poll_on;
ssize_t ret;
if (!q->mq_ops || !q->mq_ops->poll)
return -EINVAL;
ret = queue_var_store(&poll_on, page, count);
if (ret < 0)
return ret;
if (poll_on)
blk_queue_flag_set(QUEUE_FLAG_POLL, q);
else
blk_queue_flag_clear(QUEUE_FLAG_POLL, q);
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 85 | 97.70% | 1 | 50.00% |
Bart Van Assche | 2 | 2.30% | 1 | 50.00% |
Total | 87 | 100.00% | 2 | 100.00% |
static ssize_t queue_wb_lat_show(struct request_queue *q, char *page)
{
if (!q->rq_wb)
return -EINVAL;
return sprintf(page, "%llu\n", div_u64(q->rq_wb->min_lat_nsec, 1000));
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 45 | 100.00% | 1 | 100.00% |
Total | 45 | 100.00% | 1 | 100.00% |
static ssize_t queue_wb_lat_store(struct request_queue *q, const char *page,
size_t count)
{
struct rq_wb *rwb;
ssize_t ret;
s64 val;
ret = queue_var_store64(&val, page);
if (ret < 0)
return ret;
if (val < -1)
return -EINVAL;
rwb = q->rq_wb;
if (!rwb) {
ret = wbt_init(q);
if (ret)
return ret;
}
rwb = q->rq_wb;
if (val == -1)
rwb->min_lat_nsec = wbt_default_latency_nsec(q);
else if (val >= 0)
rwb->min_lat_nsec = val * 1000ULL;
if (rwb->enable_state == WBT_STATE_ON_DEFAULT)
rwb->enable_state = WBT_STATE_ON_MANUAL;
wbt_update_limits(rwb);
return count;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 145 | 99.32% | 3 | 75.00% |
weiping zhang | 1 | 0.68% | 1 | 25.00% |
Total | 146 | 100.00% | 4 | 100.00% |
static ssize_t queue_wc_show(struct request_queue *q, char *page)
{
if (test_bit(QUEUE_FLAG_WC, &q->queue_flags))
return sprintf(page, "write back\n");
return sprintf(page, "write through\n");
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 43 | 100.00% | 1 | 100.00% |
Total | 43 | 100.00% | 1 | 100.00% |
static ssize_t queue_wc_store(struct request_queue *q, const char *page,
size_t count)
{
int set = -1;
if (!strncmp(page, "write back", 10))
set = 1;
else if (!strncmp(page, "write through", 13) ||
!strncmp(page, "none", 4))
set = 0;
if (set == -1)
return -EINVAL;
if (set)
blk_queue_flag_set(QUEUE_FLAG_WC, q);
else
blk_queue_flag_clear(QUEUE_FLAG_WC, q);
return count;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 99 | 98.02% | 1 | 50.00% |
Bart Van Assche | 2 | 1.98% | 1 | 50.00% |
Total | 101 | 100.00% | 2 | 100.00% |
static ssize_t queue_fua_show(struct request_queue *q, char *page)
{
return sprintf(page, "%u\n", test_bit(QUEUE_FLAG_FUA, &q->queue_flags));
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Kent Overstreet | 33 | 100.00% | 1 | 100.00% |
Total | 33 | 100.00% | 1 | 100.00% |
static ssize_t queue_dax_show(struct request_queue *q, char *page)
{
return queue_var_show(blk_queue_dax(q), page);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Yigal Korman | 26 | 100.00% | 1 | 100.00% |
Total | 26 | 100.00% | 1 | 100.00% |
static struct queue_sysfs_entry queue_requests_entry = {
.attr = {.name = "nr_requests", .mode = 0644 },
.show = queue_requests_show,
.store = queue_requests_store,
};
static struct queue_sysfs_entry queue_ra_entry = {
.attr = {.name = "read_ahead_kb", .mode = 0644 },
.show = queue_ra_show,
.store = queue_ra_store,
};
static struct queue_sysfs_entry queue_max_sectors_entry = {
.attr = {.name = "max_sectors_kb", .mode = 0644 },
.show = queue_max_sectors_show,
.store = queue_max_sectors_store,
};
static struct queue_sysfs_entry queue_max_hw_sectors_entry = {
.attr = {.name = "max_hw_sectors_kb", .mode = 0444 },
.show = queue_max_hw_sectors_show,
};
static struct queue_sysfs_entry queue_max_segments_entry = {
.attr = {.name = "max_segments", .mode = 0444 },
.show = queue_max_segments_show,
};
static struct queue_sysfs_entry queue_max_discard_segments_entry = {
.attr = {.name = "max_discard_segments", .mode = 0444 },
.show = queue_max_discard_segments_show,
};
static struct queue_sysfs_entry queue_max_integrity_segments_entry = {
.attr = {.name = "max_integrity_segments", .mode = 0444 },
.show = queue_max_integrity_segments_show,
};
static struct queue_sysfs_entry queue_max_segment_size_entry = {
.attr = {.name = "max_segment_size", .mode = 0444 },
.show = queue_max_segment_size_show,
};
static struct queue_sysfs_entry queue_iosched_entry = {
.attr = {.name = "scheduler", .mode = 0644 },
.show = elv_iosched_show,
.store = elv_iosched_store,
};
static struct queue_sysfs_entry queue_hw_sector_size_entry = {
.attr = {.name = "hw_sector_size", .mode = 0444 },
.show = queue_logical_block_size_show,
};
static struct queue_sysfs_entry queue_logical_block_size_entry = {
.attr = {.name = "logical_block_size", .mode = 0444 },
.show = queue_logical_block_size_show,
};
static struct queue_sysfs_entry queue_physical_block_size_entry = {
.attr = {.name = "physical_block_size", .mode = 0444 },
.show = queue_physical_block_size_show,
};
static struct queue_sysfs_entry queue_chunk_sectors_entry = {
.attr = {.name = "chunk_sectors", .mode = 0444 },
.show = queue_chunk_sectors_show,
};
static struct queue_sysfs_entry queue_io_min_entry = {
.attr = {.name = "minimum_io_size", .mode = 0444 },
.show = queue_io_min_show,
};
static struct queue_sysfs_entry queue_io_opt_entry = {
.attr = {.name = "optimal_io_size", .mode = 0444 },
.show = queue_io_opt_show,
};
static struct queue_sysfs_entry queue_discard_granularity_entry = {
.attr = {.name = "discard_granularity", .mode = 0444 },
.show = queue_discard_granularity_show,
};
static struct queue_sysfs_entry queue_discard_max_hw_entry = {
.attr = {.name = "discard_max_hw_bytes", .mode = 0444 },
.show = queue_discard_max_hw_show,
};
static struct queue_sysfs_entry queue_discard_max_entry = {
.attr = {.name = "discard_max_bytes", .mode = 0644 },
.show = queue_discard_max_show,
.store = queue_discard_max_store,
};
static struct queue_sysfs_entry queue_discard_zeroes_data_entry = {
.attr = {.name = "discard_zeroes_data", .mode = 0444 },
.show = queue_discard_zeroes_data_show,
};
static struct queue_sysfs_entry queue_write_same_max_entry = {
.attr = {.name = "write_same_max_bytes", .mode = 0444 },
.show = queue_write_same_max_show,
};
static struct queue_sysfs_entry queue_write_zeroes_max_entry = {
.attr = {.name = "write_zeroes_max_bytes", .mode = 0444 },
.show = queue_write_zeroes_max_show,
};
static struct queue_sysfs_entry queue_nonrot_entry = {
.attr = {.name = "rotational", .mode = 0644 },
.show = queue_show_nonrot,
.store = queue_store_nonrot,
};
static struct queue_sysfs_entry queue_zoned_entry = {
.attr = {.name = "zoned", .mode = 0444 },
.show = queue_zoned_show,
};
static struct queue_sysfs_entry queue_nomerges_entry = {
.attr = {.name = "nomerges", .mode = 0644 },
.show = queue_nomerges_show,
.store = queue_nomerges_store,
};
static struct queue_sysfs_entry queue_rq_affinity_entry = {
.attr = {.name = "rq_affinity", .mode = 0644 },
.show = queue_rq_affinity_show,
.store = queue_rq_affinity_store,
};
static struct queue_sysfs_entry queue_iostats_entry = {
.attr = {.name = "iostats", .mode = 0644 },
.show = queue_show_iostats,
.store = queue_store_iostats,
};
static struct queue_sysfs_entry queue_random_entry = {
.attr = {.name = "add_random", .mode = 0644 },
.show = queue_show_random,
.store = queue_store_random,
};
static struct queue_sysfs_entry queue_poll_entry = {
.attr = {.name = "io_poll", .mode = 0644 },
.show = queue_poll_show,
.store = queue_poll_store,
};
static struct queue_sysfs_entry queue_poll_delay_entry = {
.attr = {.name = "io_poll_delay", .mode = 0644 },
.show = queue_poll_delay_show,
.store = queue_poll_delay_store,
};
static struct queue_sysfs_entry queue_wc_entry = {
.attr = {.name = "write_cache", .mode = 0644 },
.show = queue_wc_show,
.store = queue_wc_store,
};
static struct queue_sysfs_entry queue_fua_entry = {
.attr = {.name = "fua", .mode = 0444 },
.show = queue_fua_show,
};
static struct queue_sysfs_entry queue_dax_entry = {
.attr = {.name = "dax", .mode = 0444 },
.show = queue_dax_show,
};
static struct queue_sysfs_entry queue_wb_lat_entry = {
.attr = {.name = "wbt_lat_usec", .mode = 0644 },
.show = queue_wb_lat_show,
.store = queue_wb_lat_store,
};
#ifdef CONFIG_BLK_DEV_THROTTLING_LOW
static struct queue_sysfs_entry throtl_sample_time_entry = {
.attr = {.name = "throttle_sample_time", .mode = 0644 },
.show = blk_throtl_sample_time_show,
.store = blk_throtl_sample_time_store,
};
#endif
static struct attribute *default_attrs[] = {
&queue_requests_entry.attr,
&queue_ra_entry.attr,
&queue_max_hw_sectors_entry.attr,
&queue_max_sectors_entry.attr,
&queue_max_segments_entry.attr,
&queue_max_discard_segments_entry.attr,
&queue_max_integrity_segments_entry.attr,
&queue_max_segment_size_entry.attr,
&queue_iosched_entry.attr,
&queue_hw_sector_size_entry.attr,
&queue_logical_block_size_entry.attr,
&queue_physical_block_size_entry.attr,
&queue_chunk_sectors_entry.attr,
&queue_io_min_entry.attr,
&queue_io_opt_entry.attr,
&queue_discard_granularity_entry.attr,
&queue_discard_max_entry.attr,
&queue_discard_max_hw_entry.attr,
&queue_discard_zeroes_data_entry.attr,
&queue_write_same_max_entry.attr,
&queue_write_zeroes_max_entry.attr,
&queue_nonrot_entry.attr,
&queue_zoned_entry.attr,
&queue_nomerges_entry.attr,
&queue_rq_affinity_entry.attr,
&queue_iostats_entry.attr,
&queue_random_entry.attr,
&queue_poll_entry.attr,
&queue_wc_entry.attr,
&queue_fua_entry.attr,
&queue_dax_entry.attr,
&queue_wb_lat_entry.attr,
&queue_poll_delay_entry.attr,
#ifdef CONFIG_BLK_DEV_THROTTLING_LOW
&throtl_sample_time_entry.attr,
#endif
NULL,
};
#define to_queue(atr) container_of((atr), struct queue_sysfs_entry, attr)
static ssize_t
queue_attr_show(struct kobject *kobj, struct attribute *attr, char *page)
{
struct queue_sysfs_entry *entry = to_queue(attr);
struct request_queue *q =
container_of(kobj, struct request_queue, kobj);
ssize_t res;
if (!entry->show)
return -EIO;
mutex_lock(&q->sysfs_lock);
if (blk_queue_dying(q)) {
mutex_unlock(&q->sysfs_lock);
return -ENOENT;
}
res = entry->show(q, page);
mutex_unlock(&q->sysfs_lock);
return res;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 109 | 99.09% | 1 | 50.00% |
Bart Van Assche | 1 | 0.91% | 1 | 50.00% |
Total | 110 | 100.00% | 2 | 100.00% |
static ssize_t
queue_attr_store(struct kobject *kobj, struct attribute *attr,
const char *page, size_t length)
{
struct queue_sysfs_entry *entry = to_queue(attr);
struct request_queue *q;
ssize_t res;
if (!entry->store)
return -EIO;
q = container_of(kobj, struct request_queue, kobj);
mutex_lock(&q->sysfs_lock);
if (blk_queue_dying(q)) {
mutex_unlock(&q->sysfs_lock);
return -ENOENT;
}
res = entry->store(q, page, length);
mutex_unlock(&q->sysfs_lock);
return res;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 117 | 99.15% | 2 | 66.67% |
Bart Van Assche | 1 | 0.85% | 1 | 33.33% |
Total | 118 | 100.00% | 3 | 100.00% |
static void blk_free_queue_rcu(struct rcu_head *rcu_head)
{
struct request_queue *q = container_of(rcu_head, struct request_queue,
rcu_head);
kmem_cache_free(blk_requestq_cachep, q);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Tejun Heo | 33 | 100.00% | 1 | 100.00% |
Total | 33 | 100.00% | 1 | 100.00% |
/**
* __blk_release_queue - release a request queue when it is no longer needed
* @work: pointer to the release_work member of the request queue to be released
*
* Description:
* blk_release_queue is the counterpart of blk_init_queue(). It should be
* called when a request queue is being released; typically when a block
* device is being de-registered. Its primary task it to free the queue
* itself.
*
* Notes:
* The low level driver must have finished any outstanding requests first
* via blk_cleanup_queue().
*
* Although blk_release_queue() may be called with preemption disabled,
* __blk_release_queue() may sleep.
*/
static void __blk_release_queue(struct work_struct *work)
{
struct request_queue *q = container_of(work, typeof(*q), release_work);
if (test_bit(QUEUE_FLAG_POLL_STATS, &q->queue_flags))
blk_stat_remove_callback(q, q->poll_cb);
blk_stat_free_callback(q->poll_cb);
blk_free_queue_stats(q->stats);
blk_exit_rl(q, &q->root_rl);
if (q->queue_tags)
__blk_queue_free_tags(q);
if (!q->mq_ops) {
if (q->exit_rq_fn)
q->exit_rq_fn(q, q->fq->flush_rq);
blk_free_flush_queue(q->fq);
} else {
blk_mq_release(q);
}
blk_trace_shutdown(q);
if (q->mq_ops)
blk_mq_debugfs_unregister(q);
bioset_exit(&q->bio_split);
ida_simple_remove(&blk_queue_ida, q->id);
call_rcu(&q->rcu_head, blk_free_queue_rcu);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 49 | 28.49% | 2 | 11.76% |
Omar Sandoval | 42 | 24.42% | 2 | 11.76% |
Christoph Hellwig | 28 | 16.28% | 2 | 11.76% |
Tejun Heo | 20 | 11.63% | 4 | 23.53% |
Bart Van Assche | 13 | 7.56% | 3 | 17.65% |
Kent Overstreet | 12 | 6.98% | 2 | 11.76% |
Ming Lei | 8 | 4.65% | 2 | 11.76% |
Total | 172 | 100.00% | 17 | 100.00% |
static void blk_release_queue(struct kobject *kobj)
{
struct request_queue *q =
container_of(kobj, struct request_queue, kobj);
INIT_WORK(&q->release_work, __blk_release_queue);
schedule_work(&q->release_work);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Bart Van Assche | 44 | 100.00% | 1 | 100.00% |
Total | 44 | 100.00% | 1 | 100.00% |
static const struct sysfs_ops queue_sysfs_ops = {
.show = queue_attr_show,
.store = queue_attr_store,
};
struct kobj_type blk_queue_ktype = {
.sysfs_ops = &queue_sysfs_ops,
.default_attrs = default_attrs,
.release = blk_release_queue,
};
/**
* blk_register_queue - register a block layer queue with sysfs
* @disk: Disk of which the request queue should be registered with sysfs.
*/
int blk_register_queue(struct gendisk *disk)
{
int ret;
struct device *dev = disk_to_dev(disk);
struct request_queue *q = disk->queue;
if (WARN_ON(!q))
return -ENXIO;
WARN_ONCE(test_bit(QUEUE_FLAG_REGISTERED, &q->queue_flags),
"%s is registering an already registered queue\n",
kobject_name(&dev->kobj));
queue_flag_set_unlocked(QUEUE_FLAG_REGISTERED, q);
/*
* SCSI probing may synchronously create and destroy a lot of
* request_queues for non-existent devices. Shutting down a fully
* functional queue takes measureable wallclock time as RCU grace
* periods are involved. To avoid excessive latency in these
* cases, a request_queue starts out in a degraded mode which is
* faster to shut down and is made fully functional here as
* request_queues for non-existent devices never get registered.
*/
if (!blk_queue_init_done(q)) {
queue_flag_set_unlocked(QUEUE_FLAG_INIT_DONE, q);
percpu_ref_switch_to_percpu(&q->q_usage_counter);
blk_queue_bypass_end(q);
}
ret = blk_trace_init_sysfs(dev);
if (ret)
return ret;
/* Prevent changes through sysfs until registration is completed. */
mutex_lock(&q->sysfs_lock);
ret = kobject_add(&q->kobj, kobject_get(&dev->kobj), "%s", "queue");
if (ret < 0) {
blk_trace_remove_sysfs(dev);
goto unlock;
}
if (q->mq_ops) {
__blk_mq_register_dev(dev, q);
blk_mq_debugfs_register(q);
}
kobject_uevent(&q->kobj, KOBJ_ADD);
wbt_enable_default(q);
blk_throtl_register_queue(q);
if (q->request_fn || (q->mq_ops && q->elevator)) {
ret = elv_register_queue(q);
if (ret) {
mutex_unlock(&q->sysfs_lock);
kobject_uevent(&q->kobj, KOBJ_REMOVE);
kobject_del(&q->kobj);
blk_trace_remove_sysfs(dev);
kobject_put(&dev->kobj);
return ret;
}
}
ret = 0;
unlock:
mutex_unlock(&q->sysfs_lock);
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 106 | 35.81% | 3 | 12.50% |
Omar Sandoval | 47 | 15.88% | 3 | 12.50% |
Tahsin Erdogan | 27 | 9.12% | 1 | 4.17% |
Bart Van Assche | 26 | 8.78% | 3 | 12.50% |
Li Zefan | 25 | 8.45% | 1 | 4.17% |
Tejun Heo | 12 | 4.05% | 3 | 12.50% |
Alan Stern | 10 | 3.38% | 1 | 4.17% |
Xiaotian Feng | 8 | 2.70% | 1 | 4.17% |
Akinobu Mita | 8 | 2.70% | 1 | 4.17% |
Liu Yuan | 8 | 2.70% | 2 | 8.33% |
Shaohua Li | 5 | 1.69% | 1 | 4.17% |
Dan J Williams | 5 | 1.69% | 1 | 4.17% |
Zdenek Kabelac | 4 | 1.35% | 1 | 4.17% |
Martin K. Petersen | 4 | 1.35% | 1 | 4.17% |
Jan Kara | 1 | 0.34% | 1 | 4.17% |
Total | 296 | 100.00% | 24 | 100.00% |
EXPORT_SYMBOL_GPL(blk_register_queue);
/**
* blk_unregister_queue - counterpart of blk_register_queue()
* @disk: Disk of which the request queue should be unregistered from sysfs.
*
* Note: the caller is responsible for guaranteeing that this function is called
* after blk_register_queue() has finished.
*/
void blk_unregister_queue(struct gendisk *disk)
{
struct request_queue *q = disk->queue;
if (WARN_ON(!q))
return;
/* Return early if disk->queue was never registered. */
if (!test_bit(QUEUE_FLAG_REGISTERED, &q->queue_flags))
return;
/*
* Since sysfs_remove_dir() prevents adding new directory entries
* before removal of existing entries starts, protect against
* concurrent elv_iosched_store() calls.
*/
mutex_lock(&q->sysfs_lock);
blk_queue_flag_clear(QUEUE_FLAG_REGISTERED, q);
/*
* Remove the sysfs attributes before unregistering the queue data
* structures that can be modified through sysfs.
*/
if (q->mq_ops)
blk_mq_unregister_dev(disk_to_dev(disk), q);
mutex_unlock(&q->sysfs_lock);
kobject_uevent(&q->kobj, KOBJ_REMOVE);
kobject_del(&q->kobj);
blk_trace_remove_sysfs(disk_to_dev(disk));
wbt_exit(q);
mutex_lock(&q->sysfs_lock);
if (q->request_fn || (q->mq_ops && q->elevator))
elv_unregister_queue(q);
mutex_unlock(&q->sysfs_lock);
kobject_put(&disk_to_dev(disk)->kobj);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 56 | 34.36% | 2 | 16.67% |
Bart Van Assche | 46 | 28.22% | 2 | 16.67% |
Mike Snitzer | 23 | 14.11% | 2 | 16.67% |
Akinobu Mita | 8 | 4.91% | 1 | 8.33% |
David Jeffery | 8 | 4.91% | 1 | 8.33% |
Zdenek Kabelac | 8 | 4.91% | 1 | 8.33% |
Omar Sandoval | 6 | 3.68% | 1 | 8.33% |
Matias Björling | 6 | 3.68% | 1 | 8.33% |
Tejun Heo | 2 | 1.23% | 1 | 8.33% |
Total | 163 | 100.00% | 12 | 100.00% |
Overall Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 2374 | 53.07% | 20 | 18.69% |
Martin K. Petersen | 730 | 16.32% | 13 | 12.15% |
Alan D. Brunelle | 149 | 3.33% | 2 | 1.87% |
Bart Van Assche | 139 | 3.11% | 8 | 7.48% |
Omar Sandoval | 98 | 2.19% | 6 | 5.61% |
Christoph Hellwig | 91 | 2.03% | 5 | 4.67% |
Damien Le Moal | 86 | 1.92% | 1 | 0.93% |
Tejun Heo | 78 | 1.74% | 12 | 11.21% |
Kent Overstreet | 76 | 1.70% | 3 | 2.80% |
Dave Reisner | 73 | 1.63% | 1 | 0.93% |
Chaitanya Kulkarni | 67 | 1.50% | 1 | 0.93% |
Hannes Reinecke | 58 | 1.30% | 1 | 0.93% |
Yigal Korman | 57 | 1.27% | 1 | 0.93% |
Bartlomiej Zolnierkiewicz | 51 | 1.14% | 1 | 0.93% |
Shaohua Li | 51 | 1.14% | 2 | 1.87% |
Dan J Williams | 43 | 0.96% | 2 | 1.87% |
Joe Perches | 34 | 0.76% | 1 | 0.93% |
Mike Snitzer | 28 | 0.63% | 2 | 1.87% |
Tahsin Erdogan | 27 | 0.60% | 1 | 0.93% |
Eric Seppanen | 27 | 0.60% | 1 | 0.93% |
Li Zefan | 25 | 0.56% | 1 | 0.93% |
Akinobu Mita | 16 | 0.36% | 1 | 0.93% |
Xiaotian Feng | 13 | 0.29% | 2 | 1.87% |
Zdenek Kabelac | 12 | 0.27% | 1 | 0.93% |
Alan Stern | 10 | 0.22% | 1 | 0.93% |
Alan One Thousand Gnomes | 9 | 0.20% | 1 | 0.93% |
Liu Yuan | 8 | 0.18% | 2 | 1.87% |
David Jeffery | 8 | 0.18% | 1 | 0.93% |
Ming Lei | 8 | 0.18% | 2 | 1.87% |
Matias Björling | 6 | 0.13% | 1 | 0.93% |
Nikanth Karthikesan | 5 | 0.11% | 1 | 0.93% |
Jan Kara | 4 | 0.09% | 2 | 1.87% |
Kirill A. Shutemov | 4 | 0.09% | 1 | 0.93% |
Lei Ming | 3 | 0.07% | 1 | 0.93% |
Jingoo Han | 1 | 0.02% | 1 | 0.93% |
Tao Ma | 1 | 0.02% | 1 | 0.93% |
weiping zhang | 1 | 0.02% | 1 | 0.93% |
Emese Revfy | 1 | 0.02% | 1 | 0.93% |
Greg Kroah-Hartman | 1 | 0.02% | 1 | 0.93% |
Total | 4473 | 100.00% | 107 | 100.00% |
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