cregit-Linux how code gets into the kernel

Release 4.10 block/blk-sysfs.c

Directory: block
/*
 * 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-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

PersonTokensPropCommitsCommitProp
jens axboejens axboe2291.67%150.00%
xiaotian fengxiaotian feng28.33%150.00%
Total24100.00%2100.00%


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

PersonTokensPropCommitsCommitProp
jens axboejens axboe2950.00%133.33%
dave reisnerdave reisner2848.28%133.33%
jingoo hanjingoo han11.72%133.33%
Total58100.00%3100.00%


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

PersonTokensPropCommitsCommitProp
jens axboejens axboe50100.00%2100.00%
Total50100.00%2100.00%


static ssize_t queue_requests_show(struct request_queue *q, char *page) { return queue_var_show(q->nr_requests, (page)); }

Contributors

PersonTokensPropCommitsCommitProp
jens axboejens axboe27100.00%1100.00%
Total27100.00%1100.00%


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

PersonTokensPropCommitsCommitProp
jens axboejens axboe9990.00%350.00%
dave reisnerdave reisner98.18%116.67%
tao matao ma10.91%116.67%
tejun heotejun heo10.91%116.67%
Total110100.00%6100.00%


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

PersonTokensPropCommitsCommitProp
jens axboejens axboe3892.68%133.33%
xiaotian fengxiaotian feng24.88%133.33%
kirill a. shutemovkirill a. shutemov12.44%133.33%
Total41100.00%3100.00%


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

PersonTokensPropCommitsCommitProp
jens axboejens axboe5283.87%133.33%
dave reisnerdave reisner914.52%133.33%
kirill a. shutemovkirill a. shutemov11.61%133.33%
Total62100.00%3100.00%


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

PersonTokensPropCommitsCommitProp
jens axboejens axboe3291.43%150.00%
martin k. petersenmartin k. petersen38.57%150.00%
Total35100.00%2100.00%


static ssize_t queue_max_segments_show(struct request_queue *q, char *page) { return queue_var_show(queue_max_segments(q), (page)); }

Contributors

PersonTokensPropCommitsCommitProp
martin k. petersenmartin k. petersen28100.00%1100.00%
Total28100.00%1100.00%


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

PersonTokensPropCommitsCommitProp
martin k. petersenmartin k. petersen29100.00%1100.00%
Total29100.00%1100.00%


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

PersonTokensPropCommitsCommitProp
martin k. petersenmartin k. petersen4497.78%266.67%
kirill a. shutemovkirill a. shutemov12.22%133.33%
Total45100.00%3100.00%


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

PersonTokensPropCommitsCommitProp
martin k. petersenmartin k. petersen26100.00%2100.00%
Total26100.00%2100.00%


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

PersonTokensPropCommitsCommitProp
martin k. petersenmartin k. petersen26100.00%1100.00%
Total26100.00%1100.00%


static ssize_t queue_chunk_sectors_show(struct request_queue *q, char *page) { return queue_var_show(q->limits.chunk_sectors, page); }

Contributors

PersonTokensPropCommitsCommitProp
hannes reineckehannes reinecke27100.00%1100.00%
Total27100.00%1100.00%


static ssize_t queue_io_min_show(struct request_queue *q, char *page) { return queue_var_show(queue_io_min(q), page); }

Contributors

PersonTokensPropCommitsCommitProp
martin k. petersenmartin k. petersen26100.00%1100.00%
Total26100.00%1100.00%


static ssize_t queue_io_opt_show(struct request_queue *q, char *page) { return queue_var_show(queue_io_opt(q), page); }

Contributors

PersonTokensPropCommitsCommitProp
martin k. petersenmartin k. petersen26100.00%2100.00%
Total26100.00%2100.00%


static ssize_t queue_discard_granularity_show(struct request_queue *q, char *page) { return queue_var_show(q->limits.discard_granularity, page); }

Contributors

PersonTokensPropCommitsCommitProp
martin k. petersenmartin k. petersen27100.00%1100.00%
Total27100.00%1100.00%


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

PersonTokensPropCommitsCommitProp
jens axboejens axboe2775.00%150.00%
alan one thousand gnomesalan one thousand gnomes925.00%150.00%
Total36100.00%2100.00%


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

PersonTokensPropCommitsCommitProp
martin k. petersenmartin k. petersen36100.00%2100.00%
Total36100.00%2100.00%


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

PersonTokensPropCommitsCommitProp
jens axboejens axboe106100.00%1100.00%
Total106100.00%1100.00%


static ssize_t queue_discard_zeroes_data_show(struct request_queue *q, char *page) { return queue_var_show(queue_discard_zeroes_data(q), page); }

Contributors

PersonTokensPropCommitsCommitProp
martin k. petersenmartin k. petersen26100.00%1100.00%
Total26100.00%1100.00%


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

PersonTokensPropCommitsCommitProp
martin k. petersenmartin k. petersen36100.00%1100.00%
Total36100.00%1100.00%


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

PersonTokensPropCommitsCommitProp
chaitanya kulkarnichaitanya kulkarni36100.00%1100.00%
Total36100.00%1100.00%


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

PersonTokensPropCommitsCommitProp
jens axboejens axboe10173.19%228.57%
martin k. petersenmartin k. petersen2215.94%228.57%
dave reisnerdave reisner96.52%114.29%
nikanth karthikesannikanth karthikesan53.62%114.29%
kirill a. shutemovkirill a. shutemov10.72%114.29%
Total138100.00%7100.00%


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

PersonTokensPropCommitsCommitProp
jens axboejens axboe3291.43%150.00%
martin k. petersenmartin k. petersen38.57%150.00%
Total35100.00%2100.00%

#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; \ \ spin_lock_irq(q->queue_lock); \ if (val) \ queue_flag_set(QUEUE_FLAG_##flag, q); \ else \ queue_flag_clear(QUEUE_FLAG_##flag, q); \ spin_unlock_irq(q->queue_lock); \ 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

PersonTokensPropCommitsCommitProp
damien le moaldamien le moal55100.00%1100.00%
Total55100.00%1100.00%


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

PersonTokensPropCommitsCommitProp
alan d. brunellealan d. brunelle35100.00%2100.00%
Total35100.00%2100.00%


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

PersonTokensPropCommitsCommitProp
alan d. brunellealan d. brunelle7877.23%250.00%
jens axboejens axboe1413.86%125.00%
dave reisnerdave reisner98.91%125.00%
Total101100.00%4100.00%


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

PersonTokensPropCommitsCommitProp
jens axboejens axboe3568.63%133.33%
dan williamsdan williams1529.41%133.33%
xiaotian fengxiaotian feng11.96%133.33%
Total51100.00%3100.00%


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

PersonTokensPropCommitsCommitProp
jens axboejens axboe7855.71%120.00%
eric seppaneneric seppanen2719.29%120.00%
dan williamsdan williams2316.43%120.00%
dave reisnerdave reisner96.43%120.00%
christoph hellwigchristoph hellwig32.14%120.00%
Total140100.00%5100.00%


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

PersonTokensPropCommitsCommitProp
jens axboejens axboe51100.00%3100.00%
Total51100.00%3100.00%


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

PersonTokensPropCommitsCommitProp
jens axboejens axboe89100.00%3100.00%
Total89100.00%3100.00%


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

PersonTokensPropCommitsCommitProp
jens axboejens axboe31100.00%1100.00%
Total31100.00%1100.00%


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; spin_lock_irq(q->queue_lock); if (poll_on) queue_flag_set(QUEUE_FLAG_POLL, q); else queue_flag_clear(QUEUE_FLAG_POLL, q); spin_unlock_irq(q->queue_lock); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
jens axboejens axboe101100.00%1100.00%
Total101100.00%1100.00%


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

PersonTokensPropCommitsCommitProp
jens axboejens axboe45100.00%1100.00%
Total45100.00%1100.00%


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 (!rwb) return -EINVAL; } 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

PersonTokensPropCommitsCommitProp
jens axboejens axboe155100.00%3100.00%
Total155100.00%3100.00%


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

PersonTokensPropCommitsCommitProp
jens axboejens axboe43100.00%1100.00%
Total43100.00%1100.00%


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; spin_lock_irq(q->queue_lock); if (set) queue_flag_set(QUEUE_FLAG_WC, q); else queue_flag_clear(QUEUE_FLAG_WC, q); spin_unlock_irq(q->queue_lock); return count; }

Contributors

PersonTokensPropCommitsCommitProp
jens axboejens axboe115100.00%1100.00%
Total115100.00%1100.00%


static ssize_t queue_dax_show(struct request_queue *q, char *page) { return queue_var_show(blk_queue_dax(q), page); }

Contributors

PersonTokensPropCommitsCommitProp
yigal kormanyigal korman26100.00%1100.00%
Total26100.00%1100.00%


static ssize_t print_stat(char *page, struct blk_rq_stat *stat, const char *pre) { return sprintf(page, "%s samples=%llu, mean=%lld, min=%lld, max=%lld\n", pre, (long long) stat->nr_samples, (long long) stat->mean, (long long) stat->min, (long long) stat->max); }

Contributors

PersonTokensPropCommitsCommitProp
jens axboejens axboe62100.00%1100.00%
Total62100.00%1100.00%


static ssize_t queue_stats_show(struct request_queue *q, char *page) { struct blk_rq_stat stat[2]; ssize_t ret; blk_queue_stat_get(q, stat); ret = print_stat(page, &stat[BLK_STAT_READ], "read :"); ret += print_stat(page + ret, &stat[BLK_STAT_WRITE], "write:"); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
jens axboejens axboe67100.00%1100.00%
Total67100.00%1100.00%

static struct queue_sysfs_entry queue_requests_entry = { .attr = {.name = "nr_requests", .mode = S_IRUGO | S_IWUSR }, .show = queue_requests_show, .store = queue_requests_store, }; static struct queue_sysfs_entry queue_ra_entry = { .attr = {.name = "read_ahead_kb", .mode = S_IRUGO | S_IWUSR }, .show = queue_ra_show, .store = queue_ra_store, }; static struct queue_sysfs_entry queue_max_sectors_entry = { .attr = {.name = "max_sectors_kb", .mode = S_IRUGO | S_IWUSR }, .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 = S_IRUGO }, .show = queue_max_hw_sectors_show, }; static struct queue_sysfs_entry queue_max_segments_entry = { .attr = {.name = "max_segments", .mode = S_IRUGO }, .show = queue_max_segments_show, }; static struct queue_sysfs_entry queue_max_integrity_segments_entry = { .attr = {.name = "max_integrity_segments", .mode = S_IRUGO }, .show = queue_max_integrity_segments_show, }; static struct queue_sysfs_entry queue_max_segment_size_entry = { .attr = {.name = "max_segment_size", .mode = S_IRUGO }, .show = queue_max_segment_size_show, }; static struct queue_sysfs_entry queue_iosched_entry = { .attr = {.name = "scheduler", .mode = S_IRUGO | S_IWUSR }, .show = elv_iosched_show, .store = elv_iosched_store, }; static struct queue_sysfs_entry queue_hw_sector_size_entry = { .attr = {.name = "hw_sector_size", .mode = S_IRUGO }, .show = queue_logical_block_size_show, }; static struct queue_sysfs_entry queue_logical_block_size_entry = { .attr = {.name = "logical_block_size", .mode = S_IRUGO }, .show = queue_logical_block_size_show, }; static struct queue_sysfs_entry queue_physical_block_size_entry = { .attr = {.name = "physical_block_size", .mode = S_IRUGO }, .show = queue_physical_block_size_show, }; static struct queue_sysfs_entry queue_chunk_sectors_entry = { .attr = {.name = "chunk_sectors", .mode = S_IRUGO }, .show = queue_chunk_sectors_show, }; static struct queue_sysfs_entry queue_io_min_entry = { .attr = {.name = "minimum_io_size", .mode = S_IRUGO }, .show = queue_io_min_show, }; static struct queue_sysfs_entry queue_io_opt_entry = { .attr = {.name = "optimal_io_size", .mode = S_IRUGO }, .show = queue_io_opt_show, }; static struct queue_sysfs_entry queue_discard_granularity_entry = { .attr = {.name = "discard_granularity", .mode = S_IRUGO }, .show = queue_discard_granularity_show, }; static struct queue_sysfs_entry queue_discard_max_hw_entry = { .attr = {.name = "discard_max_hw_bytes", .mode = S_IRUGO }, .show = queue_discard_max_hw_show, }; static struct queue_sysfs_entry queue_discard_max_entry = { .attr = {.name = "discard_max_bytes", .mode = S_IRUGO | S_IWUSR }, .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 = S_IRUGO }, .show = queue_discard_zeroes_data_show, }; static struct queue_sysfs_entry queue_write_same_max_entry = { .attr = {.name = "write_same_max_bytes", .mode = S_IRUGO }, .show = queue_write_same_max_show, }; static struct queue_sysfs_entry queue_write_zeroes_max_entry = { .attr = {.name = "write_zeroes_max_bytes", .mode = S_IRUGO }, .show = queue_write_zeroes_max_show, }; static struct queue_sysfs_entry queue_nonrot_entry = { .attr = {.name = "rotational", .mode = S_IRUGO | S_IWUSR }, .show = queue_show_nonrot, .store = queue_store_nonrot, }; static struct queue_sysfs_entry queue_zoned_entry = { .attr = {.name = "zoned", .mode = S_IRUGO }, .show = queue_zoned_show, }; static struct queue_sysfs_entry queue_nomerges_entry = { .attr = {.name = "nomerges", .mode = S_IRUGO | S_IWUSR }, .show = queue_nomerges_show, .store = queue_nomerges_store, }; static struct queue_sysfs_entry queue_rq_affinity_entry = { .attr = {.name = "rq_affinity", .mode = S_IRUGO | S_IWUSR }, .show = queue_rq_affinity_show, .store = queue_rq_affinity_store, }; static struct queue_sysfs_entry queue_iostats_entry = { .attr = {.name = "iostats", .mode = S_IRUGO | S_IWUSR }, .show = queue_show_iostats, .store = queue_store_iostats, }; static struct queue_sysfs_entry queue_random_entry = { .attr = {.name = "add_random", .mode = S_IRUGO | S_IWUSR }, .show = queue_show_random, .store = queue_store_random, }; static struct queue_sysfs_entry queue_poll_entry = { .attr = {.name = "io_poll", .mode = S_IRUGO | S_IWUSR }, .show = queue_poll_show, .store = queue_poll_store, }; static struct queue_sysfs_entry queue_poll_delay_entry = { .attr = {.name = "io_poll_delay", .mode = S_IRUGO | S_IWUSR }, .show = queue_poll_delay_show, .store = queue_poll_delay_store, }; static struct queue_sysfs_entry queue_wc_entry = { .attr = {.name = "write_cache", .mode = S_IRUGO | S_IWUSR }, .show = queue_wc_show, .store = queue_wc_store, }; static struct queue_sysfs_entry queue_dax_entry = { .attr = {.name = "dax", .mode = S_IRUGO }, .show = queue_dax_show, }; static struct queue_sysfs_entry queue_stats_entry = { .attr = {.name = "stats", .mode = S_IRUGO }, .show = queue_stats_show, }; static struct queue_sysfs_entry queue_wb_lat_entry = { .attr = {.name = "wbt_lat_usec", .mode = S_IRUGO | S_IWUSR }, .show = queue_wb_lat_show, .store = queue_wb_lat_store, }; 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_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_dax_entry.attr, &queue_stats_entry.attr, &queue_wb_lat_entry.attr, &queue_poll_delay_entry.attr, 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

PersonTokensPropCommitsCommitProp
jens axboejens axboe10999.09%150.00%
bart van asschebart van assche10.91%150.00%
Total110100.00%2100.00%


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

PersonTokensPropCommitsCommitProp
jens axboejens axboe11799.15%266.67%
bart van asschebart van assche10.85%133.33%
Total118100.00%3100.00%


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

PersonTokensPropCommitsCommitProp
tejun heotejun heo33100.00%1100.00%
Total33100.00%1100.00%

/** * blk_release_queue: - release a &struct request_queue when it is no longer needed * @kobj: the kobj belonging to the request queue to be released * * Description: * blk_release_queue is the pair to blk_init_queue() or * blk_queue_make_request(). It should be called when a request queue is * being released; typically when a block device is being de-registered. * Currently, its primary task it to free all the &struct request * structures that were allocated to the queue and the queue itself. * * Note: * The low level driver must have finished any outstanding requests first * via blk_cleanup_queue(). **/
static void blk_release_queue(struct kobject *kobj) { struct request_queue *q = container_of(kobj, struct request_queue, kobj); wbt_exit(q); bdi_exit(&q->backing_dev_info); blkcg_exit_queue(q); if (q->elevator) { spin_lock_irq(q->queue_lock); ioc_clear_queue(q); spin_unlock_irq(q->queue_lock); elevator_exit(q->elevator); } blk_exit_rl(&q->root_rl); if (q->queue_tags) __blk_queue_free_tags(q); if (!q->mq_ops) blk_free_flush_queue(q->fq); else blk_mq_release(q); blk_trace_shutdown(q); if (q->bio_split) bioset_free(q->bio_split); ida_simple_remove(&blk_queue_ida, q->id); call_rcu(&q->rcu_head, blk_free_queue_rcu); }

Contributors

PersonTokensPropCommitsCommitProp
jens axboejens axboe6340.65%318.75%
tejun heotejun heo5434.84%743.75%
kent overstreetkent overstreet138.39%16.25%
hannes reineckehannes reinecke117.10%16.25%
ming leiming lei85.16%212.50%
christoph hellwigchristoph hellwig53.23%16.25%
bart van asschebart van assche10.65%16.25%
Total155100.00%16100.00%

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, };
static void blk_wb_init(struct request_queue *q) { #ifndef CONFIG_BLK_WBT_MQ if (q->mq_ops) return; #endif #ifndef CONFIG_BLK_WBT_SQ if (q->request_fn) return; #endif /* * If this fails, we don't get throttling */ wbt_init(q); }

Contributors

PersonTokensPropCommitsCommitProp
jens axboejens axboe41100.00%1100.00%
Total41100.00%1100.00%


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; /* * 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; ret = kobject_add(&q->kobj, kobject_get(&dev->kobj), "%s", "queue"); if (ret < 0) { blk_trace_remove_sysfs(dev); return ret; } kobject_uevent(&q->kobj, KOBJ_ADD); if (q->mq_ops) blk_mq_register_dev(dev, q); blk_wb_init(q); if (!q->request_fn) return 0; ret = elv_register_queue(q); if (ret) { kobject_uevent(&q->kobj, KOBJ_REMOVE); kobject_del(&q->kobj); blk_trace_remove_sysfs(dev); kobject_put(&dev->kobj); return ret; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
jens axboejens axboe12156.28%318.75%
li zefanli zefan2511.63%16.25%
tejun heotejun heo125.58%318.75%
martin k. petersenmartin k. petersen104.65%16.25%
alan sternalan stern104.65%16.25%
liu yuanliu yuan83.72%212.50%
akinobu mitaakinobu mita83.72%16.25%
xiaotian fengxiaotian feng83.72%16.25%
dan williamsdan williams52.33%16.25%
matias bjorlingmatias bjorling41.86%16.25%
zdenek kabelaczdenek kabelac41.86%16.25%
Total215100.00%16100.00%


void blk_unregister_queue(struct gendisk *disk) { struct request_queue *q = disk->queue; if (WARN_ON(!q)) return; if (q->mq_ops) blk_mq_unregister_dev(disk_to_dev(disk), q); if (q->request_fn) elv_unregister_queue(q); kobject_uevent(&q->kobj, KOBJ_REMOVE); kobject_del(&q->kobj); blk_trace_remove_sysfs(disk_to_dev(disk)); kobject_put(&disk_to_dev(disk)->kobj); }

Contributors

PersonTokensPropCommitsCommitProp
jens axboejens axboe6772.83%233.33%
akinobu mitaakinobu mita88.70%116.67%
zdenek kabelaczdenek kabelac88.70%116.67%
matias bjorlingmatias bjorling66.52%116.67%
tejun heotejun heo33.26%116.67%
Total92100.00%6100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
jens axboejens axboe269862.07%2023.81%
martin k. petersenmartin k. petersen75217.30%1315.48%
alan d. brunellealan d. brunelle1523.50%22.38%
tejun heotejun heo1132.60%1517.86%
damien le moaldamien le moal872.00%11.19%
dave reisnerdave reisner731.68%11.19%
hannes reineckehannes reinecke701.61%22.38%
chaitanya kulkarnichaitanya kulkarni681.56%11.19%
yigal kormanyigal korman581.33%11.19%
bartlomiej zolnierkiewiczbartlomiej zolnierkiewicz541.24%11.19%
dan williamsdan williams430.99%22.38%
eric seppaneneric seppanen270.62%11.19%
li zefanli zefan250.58%11.19%
akinobu mitaakinobu mita160.37%11.19%
kent overstreetkent overstreet130.30%11.19%
xiaotian fengxiaotian feng130.30%22.38%
zdenek kabelaczdenek kabelac120.28%11.19%
matias bjorlingmatias bjorling100.23%11.19%
alan sternalan stern100.23%11.19%
alan one thousand gnomesalan one thousand gnomes90.21%11.19%
ming leiming lei80.18%22.38%
christoph hellwigchristoph hellwig80.18%22.38%
liu yuanliu yuan80.18%22.38%
nikanth karthikesannikanth karthikesan50.12%11.19%
bart van asschebart van assche40.09%22.38%
kirill a. shutemovkirill a. shutemov40.09%11.19%
lei minglei ming30.07%11.19%
jingoo hanjingoo han10.02%11.19%
tao matao ma10.02%11.19%
arnd bergmannarnd bergmann10.02%11.19%
emese revfyemese revfy10.02%11.19%
Total4347100.00%84100.00%
Directory: block
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.