[people/arne_f/kernel.git] / 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)
{
}

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;
}

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;
}

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;
}

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;
}

static ssize_t blk_mq_sysfs_dispatched_show(struct blk_mq_ctx *ctx, char *page)
{
	return sprintf(page, "%lu %lu\n", ctx->rq_dispatched[1],
				ctx->rq_dispatched[0]);
}

static ssize_t blk_mq_sysfs_merged_show(struct blk_mq_ctx *ctx, char *page)
{
	return sprintf(page, "%lu\n", ctx->rq_merged);
}

static ssize_t blk_mq_sysfs_completed_show(struct blk_mq_ctx *ctx, char *page)
{
	return sprintf(page, "%lu %lu\n", ctx->rq_completed[1],
				ctx->rq_completed[0]);
}

static ssize_t sysfs_list_show(char *page, struct list_head *list, char *msg)
{
	struct request *rq;
	int len = snprintf(page, PAGE_SIZE - 1, "%s:\n", msg);

	list_for_each_entry(rq, list, queuelist) {
		const int rq_len = 2 * sizeof(rq) + 2;

		/* if the output will be truncated */
		if (PAGE_SIZE - 1 < len + rq_len) {
			/* backspacing if it can't hold '\t...\n' */
			if (PAGE_SIZE - 1 < len + 5)
				len -= rq_len;
			len += snprintf(page + len, PAGE_SIZE - 1 - len,
					"\t...\n");
			break;
		}
		len += snprintf(page + len, PAGE_SIZE - 1 - len,
				"\t%p\n", rq);
	}

	return len;
}

static ssize_t blk_mq_sysfs_rq_list_show(struct blk_mq_ctx *ctx, char *page)
{
	ssize_t ret;

	spin_lock(&ctx->lock);
	ret = sysfs_list_show(page, &ctx->rq_list, "CTX pending");
	spin_unlock(&ctx->lock);

	return ret;
}

static ssize_t blk_mq_hw_sysfs_queued_show(struct blk_mq_hw_ctx *hctx,
					   char *page)
{
	return sprintf(page, "%lu\n", hctx->queued);
}

static ssize_t blk_mq_hw_sysfs_run_show(struct blk_mq_hw_ctx *hctx, char *page)
{
	return sprintf(page, "%lu\n", hctx->run);
}

static ssize_t blk_mq_hw_sysfs_dispatched_show(struct blk_mq_hw_ctx *hctx,
					       char *page)
{
	char *start_page = page;
	int i;

	page += sprintf(page, "%8u\t%lu\n", 0U, hctx->dispatched[0]);

	for (i = 1; i < BLK_MQ_MAX_DISPATCH_ORDER; i++) {
		unsigned long d = 1U << (i - 1);

		page += sprintf(page, "%8lu\t%lu\n", d, hctx->dispatched[i]);
	}

	return page - start_page;
}

static ssize_t blk_mq_hw_sysfs_rq_list_show(struct blk_mq_hw_ctx *hctx,
					    char *page)
{
	ssize_t ret;

	spin_lock(&hctx->lock);
	ret = sysfs_list_show(page, &hctx->dispatch, "HCTX pending");
	spin_unlock(&hctx->lock);

	return ret;
}

static ssize_t blk_mq_hw_sysfs_ipi_show(struct blk_mq_hw_ctx *hctx, char *page)
{
	ssize_t ret;

	spin_lock(&hctx->lock);
	ret = sprintf(page, "%u\n", !!(hctx->flags & BLK_MQ_F_SHOULD_IPI));
	spin_unlock(&hctx->lock);

	return ret;
}

static ssize_t blk_mq_hw_sysfs_ipi_store(struct blk_mq_hw_ctx *hctx,
					 const char *page, size_t len)
{
	struct blk_mq_ctx *ctx;
	unsigned long ret;
	unsigned int i;

	if (kstrtoul(page, 10, &ret)) {
		pr_err("blk-mq-sysfs: invalid input '%s'\n", page);
		return -EINVAL;
	}

	spin_lock(&hctx->lock);
	if (ret)
		hctx->flags |= BLK_MQ_F_SHOULD_IPI;
	else
		hctx->flags &= ~BLK_MQ_F_SHOULD_IPI;
	spin_unlock(&hctx->lock);

	hctx_for_each_ctx(hctx, ctx, i)
		ctx->ipi_redirect = !!ret;

	return len;
}

static ssize_t blk_mq_hw_sysfs_tags_show(struct blk_mq_hw_ctx *hctx, char *page)
{
	return blk_mq_tag_sysfs_show(hctx->tags, page);
}

static struct blk_mq_ctx_sysfs_entry blk_mq_sysfs_dispatched = {
	.attr = {.name = "dispatched", .mode = S_IRUGO },
	.show = blk_mq_sysfs_dispatched_show,
};
static struct blk_mq_ctx_sysfs_entry blk_mq_sysfs_merged = {
	.attr = {.name = "merged", .mode = S_IRUGO },
	.show = blk_mq_sysfs_merged_show,
};
static struct blk_mq_ctx_sysfs_entry blk_mq_sysfs_completed = {
	.attr = {.name = "completed", .mode = S_IRUGO },
	.show = blk_mq_sysfs_completed_show,
};
static struct blk_mq_ctx_sysfs_entry blk_mq_sysfs_rq_list = {
	.attr = {.name = "rq_list", .mode = S_IRUGO },
	.show = blk_mq_sysfs_rq_list_show,
};

static struct attribute *default_ctx_attrs[] = {
	&blk_mq_sysfs_dispatched.attr,
	&blk_mq_sysfs_merged.attr,
	&blk_mq_sysfs_completed.attr,
	&blk_mq_sysfs_rq_list.attr,
	NULL,
};

static struct blk_mq_hw_ctx_sysfs_entry blk_mq_hw_sysfs_queued = {
	.attr = {.name = "queued", .mode = S_IRUGO },
	.show = blk_mq_hw_sysfs_queued_show,
};
static struct blk_mq_hw_ctx_sysfs_entry blk_mq_hw_sysfs_run = {
	.attr = {.name = "run", .mode = S_IRUGO },
	.show = blk_mq_hw_sysfs_run_show,
};
static struct blk_mq_hw_ctx_sysfs_entry blk_mq_hw_sysfs_dispatched = {
	.attr = {.name = "dispatched", .mode = S_IRUGO },
	.show = blk_mq_hw_sysfs_dispatched_show,
};
static struct blk_mq_hw_ctx_sysfs_entry blk_mq_hw_sysfs_pending = {
	.attr = {.name = "pending", .mode = S_IRUGO },
	.show = blk_mq_hw_sysfs_rq_list_show,
};
static struct blk_mq_hw_ctx_sysfs_entry blk_mq_hw_sysfs_ipi = {
	.attr = {.name = "ipi_redirect", .mode = S_IRUGO | S_IWUSR},
	.show = blk_mq_hw_sysfs_ipi_show,
	.store = blk_mq_hw_sysfs_ipi_store,
};
static struct blk_mq_hw_ctx_sysfs_entry blk_mq_hw_sysfs_tags = {
	.attr = {.name = "tags", .mode = S_IRUGO },
	.show = blk_mq_hw_sysfs_tags_show,
};

static struct attribute *default_hw_ctx_attrs[] = {
	&blk_mq_hw_sysfs_queued.attr,
	&blk_mq_hw_sysfs_run.attr,
	&blk_mq_hw_sysfs_dispatched.attr,
	&blk_mq_hw_sysfs_pending.attr,
	&blk_mq_hw_sysfs_ipi.attr,
	&blk_mq_hw_sysfs_tags.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_sysfs_release,
};

void blk_mq_unregister_disk(struct gendisk *disk)
{
	struct request_queue *q = disk->queue;
	struct blk_mq_hw_ctx *hctx;
	struct blk_mq_ctx *ctx;
	int i, j;

	queue_for_each_hw_ctx(q, hctx, i) {
		hctx_for_each_ctx(hctx, ctx, j) {
			kobject_del(&ctx->kobj);
			kobject_put(&ctx->kobj);
		}
		kobject_del(&hctx->kobj);
		kobject_put(&hctx->kobj);
	}

	kobject_uevent(&q->mq_kobj, KOBJ_REMOVE);
	kobject_del(&q->mq_kobj);
	kobject_put(&q->mq_kobj);

	kobject_put(&disk_to_dev(disk)->kobj);
}

int blk_mq_register_disk(struct gendisk *disk)
{
	struct device *dev = disk_to_dev(disk);
	struct request_queue *q = disk->queue;
	struct blk_mq_hw_ctx *hctx;
	struct blk_mq_ctx *ctx;
	int ret, i, j;

	kobject_init(&q->mq_kobj, &blk_mq_ktype);

	ret = kobject_add(&q->mq_kobj, kobject_get(&dev->kobj), "%s", "mq");
	if (ret < 0)
		return ret;

	kobject_uevent(&q->mq_kobj, KOBJ_ADD);

	queue_for_each_hw_ctx(q, hctx, i) {
		kobject_init(&hctx->kobj, &blk_mq_hw_ktype);
		ret = kobject_add(&hctx->kobj, &q->mq_kobj, "%u", i);
		if (ret)
			break;

		if (!hctx->nr_ctx)
			continue;

		hctx_for_each_ctx(hctx, ctx, j) {
			kobject_init(&ctx->kobj, &blk_mq_ctx_ktype);
			ret = kobject_add(&ctx->kobj, &hctx->kobj, "cpu%u", ctx->cpu);
			if (ret)
				break;
		}
	}

	if (ret) {
		blk_mq_unregister_disk(disk);
		return ret;
	}

	return 0;
}
Commit	Line	Data
320ae51f JA	1	#include <linux/kernel.h>
	2	#include <linux/module.h>
	3	#include <linux/backing-dev.h>
	4	#include <linux/bio.h>
	5	#include <linux/blkdev.h>
	6	#include <linux/mm.h>
	7	#include <linux/init.h>
	8	#include <linux/slab.h>
	9	#include <linux/workqueue.h>
	10	#include <linux/smp.h>
	11
	12	#include <linux/blk-mq.h>
	13	#include "blk-mq.h"
	14	#include "blk-mq-tag.h"
	15
	16	static void blk_mq_sysfs_release(struct kobject *kobj)
	17	{
	18	}
	19
	20	struct blk_mq_ctx_sysfs_entry {
	21	struct attribute attr;
	22	ssize_t (show)(struct blk_mq_ctx , char *);
	23	ssize_t (store)(struct blk_mq_ctx , const char *, size_t);
	24	};
	25
	26	struct blk_mq_hw_ctx_sysfs_entry {
	27	struct attribute attr;
	28	ssize_t (show)(struct blk_mq_hw_ctx , char *);
	29	ssize_t (store)(struct blk_mq_hw_ctx , const char *, size_t);
	30	};
	31
	32	static ssize_t blk_mq_sysfs_show(struct kobject kobj, struct attribute attr,
	33	char *page)
	34	{
	35	struct blk_mq_ctx_sysfs_entry *entry;
	36	struct blk_mq_ctx *ctx;
	37	struct request_queue *q;
	38	ssize_t res;
	39
	40	entry = container_of(attr, struct blk_mq_ctx_sysfs_entry, attr);
	41	ctx = container_of(kobj, struct blk_mq_ctx, kobj);
	42	q = ctx->queue;
	43
	44	if (!entry->show)
	45	return -EIO;
	46
	47	res = -ENOENT;
	48	mutex_lock(&q->sysfs_lock);
	49	if (!blk_queue_dying(q))
	50	res = entry->show(ctx, page);
	51	mutex_unlock(&q->sysfs_lock);
	52	return res;
	53	}
	54
	55	static ssize_t blk_mq_sysfs_store(struct kobject kobj, struct attribute attr,
	56	const char *page, size_t length)
	57	{
	58	struct blk_mq_ctx_sysfs_entry *entry;
	59	struct blk_mq_ctx *ctx;
	60	struct request_queue *q;
	61	ssize_t res;
	62
	63	entry = container_of(attr, struct blk_mq_ctx_sysfs_entry, attr);
	64	ctx = container_of(kobj, struct blk_mq_ctx, kobj);
65	q = ctx->queue;
66
67	if (!entry->store)
68	return -EIO;
69
70	res = -ENOENT;
71	mutex_lock(&q->sysfs_lock);
72	if (!blk_queue_dying(q))
73	res = entry->store(ctx, page, length);
74	mutex_unlock(&q->sysfs_lock);
75	return res;
76	}
77
78	static ssize_t blk_mq_hw_sysfs_show(struct kobject *kobj,
79	struct attribute attr, char page)
80	{
81	struct blk_mq_hw_ctx_sysfs_entry *entry;
82	struct blk_mq_hw_ctx *hctx;
83	struct request_queue *q;
84	ssize_t res;
85
86	entry = container_of(attr, struct blk_mq_hw_ctx_sysfs_entry, attr);
87	hctx = container_of(kobj, struct blk_mq_hw_ctx, kobj);
88	q = hctx->queue;
89
90	if (!entry->show)
91	return -EIO;
92
93	res = -ENOENT;
94	mutex_lock(&q->sysfs_lock);
95	if (!blk_queue_dying(q))
96	res = entry->show(hctx, page);
97	mutex_unlock(&q->sysfs_lock);
98	return res;
99	}
100
101	static ssize_t blk_mq_hw_sysfs_store(struct kobject *kobj,
102	struct attribute attr, const char page,
103	size_t length)
104	{
105	struct blk_mq_hw_ctx_sysfs_entry *entry;
106	struct blk_mq_hw_ctx *hctx;
107	struct request_queue *q;
108	ssize_t res;
109
110	entry = container_of(attr, struct blk_mq_hw_ctx_sysfs_entry, attr);
111	hctx = container_of(kobj, struct blk_mq_hw_ctx, kobj);
112	q = hctx->queue;
113
114	if (!entry->store)
115	return -EIO;
116
117	res = -ENOENT;
118	mutex_lock(&q->sysfs_lock);
119	if (!blk_queue_dying(q))
120	res = entry->store(hctx, page, length);
121	mutex_unlock(&q->sysfs_lock);
122	return res;
123	}
124
125	static ssize_t blk_mq_sysfs_dispatched_show(struct blk_mq_ctx ctx, char page)
126	{
127	return sprintf(page, "%lu %lu\n", ctx->rq_dispatched[1],
128	ctx->rq_dispatched[0]);
129	}
130
131	static ssize_t blk_mq_sysfs_merged_show(struct blk_mq_ctx ctx, char page)
132	{
133	return sprintf(page, "%lu\n", ctx->rq_merged);
134	}
135
136	static ssize_t blk_mq_sysfs_completed_show(struct blk_mq_ctx ctx, char page)
137	{
138	return sprintf(page, "%lu %lu\n", ctx->rq_completed[1],
139	ctx->rq_completed[0]);
140	}
141
142	static ssize_t sysfs_list_show(char page, struct list_head list, char *msg)
143	{
320ae51f	144	struct request *rq;
efa9b80e ML	145	int len = snprintf(page, PAGE_SIZE - 1, "%s:\n", msg);
	146
	147	list_for_each_entry(rq, list, queuelist) {
	148	const int rq_len = 2 * sizeof(rq) + 2;
	149
	150	/* if the output will be truncated */
	151	if (PAGE_SIZE - 1 < len + rq_len) {
	152	/* backspacing if it can't hold '\t...\n' */
	153	if (PAGE_SIZE - 1 < len + 5)
	154	len -= rq_len;
	155	len += snprintf(page + len, PAGE_SIZE - 1 - len,
	156	"\t...\n");
	157	break;
	158	}
	159	len += snprintf(page + len, PAGE_SIZE - 1 - len,
	160	"\t%p\n", rq);
	161	}
320ae51f	162
efa9b80e	163	return len;
320ae51f JA	164	}
	165
	166	static ssize_t blk_mq_sysfs_rq_list_show(struct blk_mq_ctx ctx, char page)
	167	{
	168	ssize_t ret;
	169
	170	spin_lock(&ctx->lock);
	171	ret = sysfs_list_show(page, &ctx->rq_list, "CTX pending");
	172	spin_unlock(&ctx->lock);
	173
	174	return ret;
	175	}
	176
	177	static ssize_t blk_mq_hw_sysfs_queued_show(struct blk_mq_hw_ctx *hctx,
	178	char *page)
	179	{
	180	return sprintf(page, "%lu\n", hctx->queued);
	181	}
	182
	183	static ssize_t blk_mq_hw_sysfs_run_show(struct blk_mq_hw_ctx hctx, char page)
	184	{
	185	return sprintf(page, "%lu\n", hctx->run);
	186	}
	187
	188	static ssize_t blk_mq_hw_sysfs_dispatched_show(struct blk_mq_hw_ctx *hctx,
	189	char *page)
	190	{
	191	char *start_page = page;
	192	int i;
	193
	194	page += sprintf(page, "%8u\t%lu\n", 0U, hctx->dispatched[0]);
	195
	196	for (i = 1; i < BLK_MQ_MAX_DISPATCH_ORDER; i++) {
	197	unsigned long d = 1U << (i - 1);
	198
	199	page += sprintf(page, "%8lu\t%lu\n", d, hctx->dispatched[i]);
	200	}
	201
	202	return page - start_page;
	203	}
	204
	205	static ssize_t blk_mq_hw_sysfs_rq_list_show(struct blk_mq_hw_ctx *hctx,
	206	char *page)
	207	{
	208	ssize_t ret;
	209
	210	spin_lock(&hctx->lock);
	211	ret = sysfs_list_show(page, &hctx->dispatch, "HCTX pending");
	212	spin_unlock(&hctx->lock);
	213
	214	return ret;
	215	}
	216
	217	static ssize_t blk_mq_hw_sysfs_ipi_show(struct blk_mq_hw_ctx hctx, char page)
	218	{
	219	ssize_t ret;
	220
	221	spin_lock(&hctx->lock);
	222	ret = sprintf(page, "%u\n", !!(hctx->flags & BLK_MQ_F_SHOULD_IPI));
	223	spin_unlock(&hctx->lock);
	224
	225	return ret;
	226	}
	227
228	static ssize_t blk_mq_hw_sysfs_ipi_store(struct blk_mq_hw_ctx *hctx,
229	const char *page, size_t len)
230	{
231	struct blk_mq_ctx *ctx;
232	unsigned long ret;
233	unsigned int i;
234
235	if (kstrtoul(page, 10, &ret)) {
236	pr_err("blk-mq-sysfs: invalid input '%s'\n", page);
237	return -EINVAL;
238	}
239
240	spin_lock(&hctx->lock);
241	if (ret)
242	hctx->flags \|= BLK_MQ_F_SHOULD_IPI;
243	else
244	hctx->flags &= ~BLK_MQ_F_SHOULD_IPI;
245	spin_unlock(&hctx->lock);
246
247	hctx_for_each_ctx(hctx, ctx, i)
248	ctx->ipi_redirect = !!ret;
249
250	return len;
251	}
252
253	static ssize_t blk_mq_hw_sysfs_tags_show(struct blk_mq_hw_ctx hctx, char page)
254	{
255	return blk_mq_tag_sysfs_show(hctx->tags, page);
256	}
257
258	static struct blk_mq_ctx_sysfs_entry blk_mq_sysfs_dispatched = {
259	.attr = {.name = "dispatched", .mode = S_IRUGO },
260	.show = blk_mq_sysfs_dispatched_show,
261	};
262	static struct blk_mq_ctx_sysfs_entry blk_mq_sysfs_merged = {
263	.attr = {.name = "merged", .mode = S_IRUGO },
264	.show = blk_mq_sysfs_merged_show,
265	};
266	static struct blk_mq_ctx_sysfs_entry blk_mq_sysfs_completed = {
267	.attr = {.name = "completed", .mode = S_IRUGO },
268	.show = blk_mq_sysfs_completed_show,
269	};
270	static struct blk_mq_ctx_sysfs_entry blk_mq_sysfs_rq_list = {
271	.attr = {.name = "rq_list", .mode = S_IRUGO },
272	.show = blk_mq_sysfs_rq_list_show,
273	};
274
275	static struct attribute *default_ctx_attrs[] = {
276	&blk_mq_sysfs_dispatched.attr,
277	&blk_mq_sysfs_merged.attr,
278	&blk_mq_sysfs_completed.attr,
279	&blk_mq_sysfs_rq_list.attr,
280	NULL,
281	};
282
283	static struct blk_mq_hw_ctx_sysfs_entry blk_mq_hw_sysfs_queued = {
284	.attr = {.name = "queued", .mode = S_IRUGO },
285	.show = blk_mq_hw_sysfs_queued_show,
286	};
287	static struct blk_mq_hw_ctx_sysfs_entry blk_mq_hw_sysfs_run = {
288	.attr = {.name = "run", .mode = S_IRUGO },
289	.show = blk_mq_hw_sysfs_run_show,
290	};
291	static struct blk_mq_hw_ctx_sysfs_entry blk_mq_hw_sysfs_dispatched = {
292	.attr = {.name = "dispatched", .mode = S_IRUGO },
293	.show = blk_mq_hw_sysfs_dispatched_show,
294	};
295	static struct blk_mq_hw_ctx_sysfs_entry blk_mq_hw_sysfs_pending = {
296	.attr = {.name = "pending", .mode = S_IRUGO },
297	.show = blk_mq_hw_sysfs_rq_list_show,
298	};
299	static struct blk_mq_hw_ctx_sysfs_entry blk_mq_hw_sysfs_ipi = {
300	.attr = {.name = "ipi_redirect", .mode = S_IRUGO \| S_IWUSR},
301	.show = blk_mq_hw_sysfs_ipi_show,
302	.store = blk_mq_hw_sysfs_ipi_store,
303	};
304	static struct blk_mq_hw_ctx_sysfs_entry blk_mq_hw_sysfs_tags = {
305	.attr = {.name = "tags", .mode = S_IRUGO },
306	.show = blk_mq_hw_sysfs_tags_show,
307	};
308
309	static struct attribute *default_hw_ctx_attrs[] = {
310	&blk_mq_hw_sysfs_queued.attr,
311	&blk_mq_hw_sysfs_run.attr,
312	&blk_mq_hw_sysfs_dispatched.attr,
313	&blk_mq_hw_sysfs_pending.attr,
314	&blk_mq_hw_sysfs_ipi.attr,
315	&blk_mq_hw_sysfs_tags.attr,
316	NULL,
317	};
318
319	static const struct sysfs_ops blk_mq_sysfs_ops = {
320	.show = blk_mq_sysfs_show,
321	.store = blk_mq_sysfs_store,
322	};
323
324	static const struct sysfs_ops blk_mq_hw_sysfs_ops = {
325	.show = blk_mq_hw_sysfs_show,
326	.store = blk_mq_hw_sysfs_store,
327	};
328
329	static struct kobj_type blk_mq_ktype = {
330	.sysfs_ops = &blk_mq_sysfs_ops,
331	.release = blk_mq_sysfs_release,
332	};
333
334	static struct kobj_type blk_mq_ctx_ktype = {
335	.sysfs_ops = &blk_mq_sysfs_ops,
336	.default_attrs = default_ctx_attrs,
337	.release = blk_mq_sysfs_release,
338	};
339
340	static struct kobj_type blk_mq_hw_ktype = {
341	.sysfs_ops = &blk_mq_hw_sysfs_ops,
342	.default_attrs = default_hw_ctx_attrs,
343	.release = blk_mq_sysfs_release,
344	};
345
346	void blk_mq_unregister_disk(struct gendisk *disk)
347	{
348	struct request_queue *q = disk->queue;
85157366 AV	349	struct blk_mq_hw_ctx *hctx;
	350	struct blk_mq_ctx *ctx;
	351	int i, j;
	352
	353	queue_for_each_hw_ctx(q, hctx, i) {
	354	hctx_for_each_ctx(hctx, ctx, j) {
	355	kobject_del(&ctx->kobj);
	356	kobject_put(&ctx->kobj);
	357	}
	358	kobject_del(&hctx->kobj);
	359	kobject_put(&hctx->kobj);
	360	}
320ae51f JA	361
	362	kobject_uevent(&q->mq_kobj, KOBJ_REMOVE);
	363	kobject_del(&q->mq_kobj);
85157366	364	kobject_put(&q->mq_kobj);
320ae51f JA	365
	366	kobject_put(&disk_to_dev(disk)->kobj);
	367	}
	368
	369	int blk_mq_register_disk(struct gendisk *disk)
	370	{
	371	struct device *dev = disk_to_dev(disk);
	372	struct request_queue *q = disk->queue;
	373	struct blk_mq_hw_ctx *hctx;
	374	struct blk_mq_ctx *ctx;
	375	int ret, i, j;
	376
	377	kobject_init(&q->mq_kobj, &blk_mq_ktype);
	378
	379	ret = kobject_add(&q->mq_kobj, kobject_get(&dev->kobj), "%s", "mq");
	380	if (ret < 0)
	381	return ret;
	382
	383	kobject_uevent(&q->mq_kobj, KOBJ_ADD);
	384
	385	queue_for_each_hw_ctx(q, hctx, i) {
	386	kobject_init(&hctx->kobj, &blk_mq_hw_ktype);
	387	ret = kobject_add(&hctx->kobj, &q->mq_kobj, "%u", i);
	388	if (ret)
	389	break;
	390
	391	if (!hctx->nr_ctx)
	392	continue;
	393
	394	hctx_for_each_ctx(hctx, ctx, j) {
	395	kobject_init(&ctx->kobj, &blk_mq_ctx_ktype);
	396	ret = kobject_add(&ctx->kobj, &hctx->kobj, "cpu%u", ctx->cpu);
	397	if (ret)
	398	break;
	399	}
	400	}
	401
	402	if (ret) {
	403	blk_mq_unregister_disk(disk);
	404	return ret;
	405	}
	406
	407	return 0;
	408	}