Release 4.16 block/blk-mq-sysfs.c
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/backing-dev.h>
#include <linux/bio.h>
#include <linux/blkdev.h>
#include <linux/mm.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
#include <linux/smp.h>
#include <linux/blk-mq.h>
#include "blk-mq.h"
#include "blk-mq-tag.h"
static void blk_mq_sysfs_release(struct kobject *kobj)
{
}
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Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 9 | 90.00% | 1 | 50.00% |
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Total | 10 | 100.00% | 2 | 100.00% |
static void blk_mq_hw_sysfs_release(struct kobject *kobj)
{
struct blk_mq_hw_ctx *hctx = container_of(kobj, struct blk_mq_hw_ctx,
kobj);
free_cpumask_var(hctx->cpumask);
kfree(hctx->ctxs);
kfree(hctx);
}
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struct blk_mq_ctx_sysfs_entry {
struct attribute attr;
ssize_t (*show)(struct blk_mq_ctx *, char *);
ssize_t (*store)(struct blk_mq_ctx *, const char *, size_t);
};
struct blk_mq_hw_ctx_sysfs_entry {
struct attribute attr;
ssize_t (*show)(struct blk_mq_hw_ctx *, char *);
ssize_t (*store)(struct blk_mq_hw_ctx *, const char *, size_t);
};
static ssize_t blk_mq_sysfs_show(struct kobject *kobj, struct attribute *attr,
char *page)
{
struct blk_mq_ctx_sysfs_entry *entry;
struct blk_mq_ctx *ctx;
struct request_queue *q;
ssize_t res;
entry = container_of(attr, struct blk_mq_ctx_sysfs_entry, attr);
ctx = container_of(kobj, struct blk_mq_ctx, kobj);
q = ctx->queue;
if (!entry->show)
return -EIO;
res = -ENOENT;
mutex_lock(&q->sysfs_lock);
if (!blk_queue_dying(q))
res = entry->show(ctx, page);
mutex_unlock(&q->sysfs_lock);
return res;
}
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Jens Axboe | 122 | 100.00% | 1 | 100.00% |
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static ssize_t blk_mq_sysfs_store(struct kobject *kobj, struct attribute *attr,
const char *page, size_t length)
{
struct blk_mq_ctx_sysfs_entry *entry;
struct blk_mq_ctx *ctx;
struct request_queue *q;
ssize_t res;
entry = container_of(attr, struct blk_mq_ctx_sysfs_entry, attr);
ctx = container_of(kobj, struct blk_mq_ctx, kobj);
q = ctx->queue;
if (!entry->store)
return -EIO;
res = -ENOENT;
mutex_lock(&q->sysfs_lock);
if (!blk_queue_dying(q))
res = entry->store(ctx, page, length);
mutex_unlock(&q->sysfs_lock);
return res;
}
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Jens Axboe | 128 | 100.00% | 1 | 100.00% |
Total | 128 | 100.00% | 1 | 100.00% |
static ssize_t blk_mq_hw_sysfs_show(struct kobject *kobj,
struct attribute *attr, char *page)
{
struct blk_mq_hw_ctx_sysfs_entry *entry;
struct blk_mq_hw_ctx *hctx;
struct request_queue *q;
ssize_t res;
entry = container_of(attr, struct blk_mq_hw_ctx_sysfs_entry, attr);
hctx = container_of(kobj, struct blk_mq_hw_ctx, kobj);
q = hctx->queue;
if (!entry->show)
return -EIO;
res = -ENOENT;
mutex_lock(&q->sysfs_lock);
if (!blk_queue_dying(q))
res = entry->show(hctx, page);
mutex_unlock(&q->sysfs_lock);
return res;
}
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Jens Axboe | 122 | 100.00% | 1 | 100.00% |
Total | 122 | 100.00% | 1 | 100.00% |
static ssize_t blk_mq_hw_sysfs_store(struct kobject *kobj,
struct attribute *attr, const char *page,
size_t length)
{
struct blk_mq_hw_ctx_sysfs_entry *entry;
struct blk_mq_hw_ctx *hctx;
struct request_queue *q;
ssize_t res;
entry = container_of(attr, struct blk_mq_hw_ctx_sysfs_entry, attr);
hctx = container_of(kobj, struct blk_mq_hw_ctx, kobj);
q = hctx->queue;
if (!entry->store)
return -EIO;
res = -ENOENT;
mutex_lock(&q->sysfs_lock);
if (!blk_queue_dying(q))
res = entry->store(hctx, page, length);
mutex_unlock(&q->sysfs_lock);
return res;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 128 | 100.00% | 1 | 100.00% |
Total | 128 | 100.00% | 1 | 100.00% |
static ssize_t blk_mq_hw_sysfs_nr_tags_show(struct blk_mq_hw_ctx *hctx,
char *page)
{
return sprintf(page, "%u\n", hctx->tags->nr_tags);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 20 | 68.97% | 1 | 50.00% |
Omar Sandoval | 9 | 31.03% | 1 | 50.00% |
Total | 29 | 100.00% | 2 | 100.00% |
static ssize_t blk_mq_hw_sysfs_nr_reserved_tags_show(struct blk_mq_hw_ctx *hctx,
char *page)
{
return sprintf(page, "%u\n", hctx->tags->nr_reserved_tags);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 21 | 72.41% | 1 | 50.00% |
Omar Sandoval | 8 | 27.59% | 1 | 50.00% |
Total | 29 | 100.00% | 2 | 100.00% |
static ssize_t blk_mq_hw_sysfs_cpus_show(struct blk_mq_hw_ctx *hctx, char *page)
{
unsigned int i, first = 1;
ssize_t ret = 0;
for_each_cpu(i, hctx->cpumask) {
if (first)
ret += sprintf(ret + page, "%u", i);
else
ret += sprintf(ret + page, ", %u", i);
first = 0;
}
ret += sprintf(ret + page, "\n");
return ret;
}
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Jens Axboe | 85 | 100.00% | 2 | 100.00% |
Total | 85 | 100.00% | 2 | 100.00% |
static struct attribute *default_ctx_attrs[] = {
NULL,
};
static struct blk_mq_hw_ctx_sysfs_entry blk_mq_hw_sysfs_nr_tags = {
.attr = {.name = "nr_tags", .mode = S_IRUGO },
.show = blk_mq_hw_sysfs_nr_tags_show,
};
static struct blk_mq_hw_ctx_sysfs_entry blk_mq_hw_sysfs_nr_reserved_tags = {
.attr = {.name = "nr_reserved_tags", .mode = S_IRUGO },
.show = blk_mq_hw_sysfs_nr_reserved_tags_show,
};
static struct blk_mq_hw_ctx_sysfs_entry blk_mq_hw_sysfs_cpus = {
.attr = {.name = "cpu_list", .mode = S_IRUGO },
.show = blk_mq_hw_sysfs_cpus_show,
};
static struct attribute *default_hw_ctx_attrs[] = {
&blk_mq_hw_sysfs_nr_tags.attr,
&blk_mq_hw_sysfs_nr_reserved_tags.attr,
&blk_mq_hw_sysfs_cpus.attr,
NULL,
};
static const struct sysfs_ops blk_mq_sysfs_ops = {
.show = blk_mq_sysfs_show,
.store = blk_mq_sysfs_store,
};
static const struct sysfs_ops blk_mq_hw_sysfs_ops = {
.show = blk_mq_hw_sysfs_show,
.store = blk_mq_hw_sysfs_store,
};
static struct kobj_type blk_mq_ktype = {
.sysfs_ops = &blk_mq_sysfs_ops,
.release = blk_mq_sysfs_release,
};
static struct kobj_type blk_mq_ctx_ktype = {
.sysfs_ops = &blk_mq_sysfs_ops,
.default_attrs = default_ctx_attrs,
.release = blk_mq_sysfs_release,
};
static struct kobj_type blk_mq_hw_ktype = {
.sysfs_ops = &blk_mq_hw_sysfs_ops,
.default_attrs = default_hw_ctx_attrs,
.release = blk_mq_hw_sysfs_release,
};
static void blk_mq_unregister_hctx(struct blk_mq_hw_ctx *hctx)
{
struct blk_mq_ctx *ctx;
int i;
if (!hctx->nr_ctx)
return;
hctx_for_each_ctx(hctx, ctx, i)
kobject_del(&ctx->kobj);
kobject_del(&hctx->kobj);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 50 | 98.04% | 1 | 50.00% |
Fengguang Wu | 1 | 1.96% | 1 | 50.00% |
Total | 51 | 100.00% | 2 | 100.00% |
static int blk_mq_register_hctx(struct blk_mq_hw_ctx *hctx)
{
struct request_queue *q = hctx->queue;
struct blk_mq_ctx *ctx;
int i, ret;
if (!hctx->nr_ctx)
return 0;
ret = kobject_add(&hctx->kobj, &q->mq_kobj, "%u", hctx->queue_num);
if (ret)
return ret;
hctx_for_each_ctx(hctx, ctx, i) {
ret = kobject_add(&ctx->kobj, &hctx->kobj, "cpu%u", ctx->cpu);
if (ret)
break;
}
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 106 | 99.07% | 1 | 50.00% |
Fengguang Wu | 1 | 0.93% | 1 | 50.00% |
Total | 107 | 100.00% | 2 | 100.00% |
void blk_mq_unregister_dev(struct device *dev, struct request_queue *q)
{
struct blk_mq_hw_ctx *hctx;
int i;
lockdep_assert_held(&q->sysfs_lock);
queue_for_each_hw_ctx(q, hctx, i)
blk_mq_unregister_hctx(hctx);
kobject_uevent(&q->mq_kobj, KOBJ_REMOVE);
kobject_del(&q->mq_kobj);
kobject_put(&dev->kobj);
q->mq_sysfs_init_done = false;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 39 | 51.32% | 3 | 37.50% |
Andrey Vagin | 16 | 21.05% | 1 | 12.50% |
Bart Van Assche | 8 | 10.53% | 1 | 12.50% |
Akinobu Mita | 6 | 7.89% | 1 | 12.50% |
Matias Björling | 6 | 7.89% | 1 | 12.50% |
Mike Snitzer | 1 | 1.32% | 1 | 12.50% |
Total | 76 | 100.00% | 8 | 100.00% |
void blk_mq_hctx_kobj_init(struct blk_mq_hw_ctx *hctx)
{
kobject_init(&hctx->kobj, &blk_mq_hw_ktype);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Keith Busch | 21 | 100.00% | 1 | 100.00% |
Total | 21 | 100.00% | 1 | 100.00% |
void blk_mq_sysfs_deinit(struct request_queue *q)
{
struct blk_mq_ctx *ctx;
int cpu;
for_each_possible_cpu(cpu) {
ctx = per_cpu_ptr(q->queue_ctx, cpu);
kobject_put(&ctx->kobj);
}
kobject_put(&q->mq_kobj);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Lei Ming | 51 | 100.00% | 1 | 100.00% |
Total | 51 | 100.00% | 1 | 100.00% |
void blk_mq_sysfs_init(struct request_queue *q)
{
struct blk_mq_ctx *ctx;
int cpu;
kobject_init(&q->mq_kobj, &blk_mq_ktype);
for_each_possible_cpu(cpu) {
ctx = per_cpu_ptr(q->queue_ctx, cpu);
kobject_init(&ctx->kobj, &blk_mq_ctx_ktype);
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 42 | 73.68% | 1 | 50.00% |
Thomas Gleixner | 15 | 26.32% | 1 | 50.00% |
Total | 57 | 100.00% | 2 | 100.00% |
int __blk_mq_register_dev(struct device *dev, struct request_queue *q)
{
struct blk_mq_hw_ctx *hctx;
int ret, i;
WARN_ON_ONCE(!q->kobj.parent);
lockdep_assert_held(&q->sysfs_lock);
ret = kobject_add(&q->mq_kobj, kobject_get(&dev->kobj), "%s", "mq");
if (ret < 0)
goto out;
kobject_uevent(&q->mq_kobj, KOBJ_ADD);
queue_for_each_hw_ctx(q, hctx, i) {
ret = blk_mq_register_hctx(hctx);
if (ret)
goto unreg;
}
q->mq_sysfs_init_done = true;
out:
return ret;
unreg:
while (--i >= 0)
blk_mq_unregister_hctx(q->queue_hw_ctx[i]);
kobject_uevent(&q->mq_kobj, KOBJ_REMOVE);
kobject_del(&q->mq_kobj);
kobject_put(&dev->kobj);
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 84 | 50.30% | 2 | 33.33% |
Bart Van Assche | 72 | 43.11% | 2 | 33.33% |
Akinobu Mita | 7 | 4.19% | 1 | 16.67% |
Matias Björling | 4 | 2.40% | 1 | 16.67% |
Total | 167 | 100.00% | 6 | 100.00% |
int blk_mq_register_dev(struct device *dev, struct request_queue *q)
{
int ret;
mutex_lock(&q->sysfs_lock);
ret = __blk_mq_register_dev(dev, q);
mutex_unlock(&q->sysfs_lock);
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Bart Van Assche | 41 | 89.13% | 1 | 33.33% |
Jens Axboe | 4 | 8.70% | 1 | 33.33% |
Akinobu Mita | 1 | 2.17% | 1 | 33.33% |
Total | 46 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL_GPL(blk_mq_register_dev);
void blk_mq_sysfs_unregister(struct request_queue *q)
{
struct blk_mq_hw_ctx *hctx;
int i;
mutex_lock(&q->sysfs_lock);
if (!q->mq_sysfs_init_done)
goto unlock;
queue_for_each_hw_ctx(q, hctx, i)
blk_mq_unregister_hctx(hctx);
unlock:
mutex_unlock(&q->sysfs_lock);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 31 | 52.54% | 2 | 50.00% |
Bart Van Assche | 21 | 35.59% | 1 | 25.00% |
Akinobu Mita | 7 | 11.86% | 1 | 25.00% |
Total | 59 | 100.00% | 4 | 100.00% |
int blk_mq_sysfs_register(struct request_queue *q)
{
struct blk_mq_hw_ctx *hctx;
int i, ret = 0;
mutex_lock(&q->sysfs_lock);
if (!q->mq_sysfs_init_done)
goto unlock;
queue_for_each_hw_ctx(q, hctx, i) {
ret = blk_mq_register_hctx(hctx);
if (ret)
break;
}
unlock:
mutex_unlock(&q->sysfs_lock);
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 47 | 62.67% | 2 | 50.00% |
Bart Van Assche | 21 | 28.00% | 1 | 25.00% |
Akinobu Mita | 7 | 9.33% | 1 | 25.00% |
Total | 75 | 100.00% | 4 | 100.00% |
Overall Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 1365 | 78.00% | 7 | 31.82% |
Bart Van Assche | 163 | 9.31% | 2 | 9.09% |
Lei Ming | 97 | 5.54% | 3 | 13.64% |
Akinobu Mita | 28 | 1.60% | 1 | 4.55% |
Omar Sandoval | 25 | 1.43% | 1 | 4.55% |
Keith Busch | 21 | 1.20% | 1 | 4.55% |
Andrey Vagin | 16 | 0.91% | 1 | 4.55% |
Thomas Gleixner | 15 | 0.86% | 1 | 4.55% |
Matias Björling | 11 | 0.63% | 1 | 4.55% |
Mike Snitzer | 5 | 0.29% | 2 | 9.09% |
Fengguang Wu | 2 | 0.11% | 1 | 4.55% |
Ming Lei | 2 | 0.11% | 1 | 4.55% |
Total | 1750 | 100.00% | 22 | 100.00% |
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