* prevent that q->request_fn() gets invoked after draining finished.
*/
blk_freeze_queue(q);
- if (!q->mq_ops) {
- spin_lock_irq(lock);
+ spin_lock_irq(lock);
+ if (!q->mq_ops)
__blk_drain_queue(q, true);
- } else {
- blk_mq_debugfs_unregister_mq(q);
- spin_lock_irq(lock);
- }
queue_flag_set(QUEUE_FLAG_DEAD, q);
spin_unlock_irq(lock);
#include <linux/blk-mq.h>
#include "blk.h"
#include "blk-mq.h"
+#include "blk-mq-debugfs.h"
#include "blk-mq-tag.h"
-struct blk_mq_debugfs_attr {
- const char *name;
- umode_t mode;
- const struct file_operations *fops;
-};
-
-static int blk_mq_debugfs_seq_open(struct inode *inode, struct file *file,
- const struct seq_operations *ops)
-{
- struct seq_file *m;
- int ret;
-
- ret = seq_open(file, ops);
- if (!ret) {
- m = file->private_data;
- m->private = inode->i_private;
- }
- return ret;
-}
-
static int blk_flags_show(struct seq_file *m, const unsigned long flags,
const char *const *flag_name, int flag_name_count)
{
if (!(flags & BIT(i)))
continue;
if (sep)
- seq_puts(m, " ");
+ seq_puts(m, "|");
sep = true;
if (i < flag_name_count && flag_name[i])
seq_puts(m, flag_name[i]);
return 0;
}
+#define QUEUE_FLAG_NAME(name) [QUEUE_FLAG_##name] = #name
static const char *const blk_queue_flag_name[] = {
- [QUEUE_FLAG_QUEUED] = "QUEUED",
- [QUEUE_FLAG_STOPPED] = "STOPPED",
- [QUEUE_FLAG_SYNCFULL] = "SYNCFULL",
- [QUEUE_FLAG_ASYNCFULL] = "ASYNCFULL",
- [QUEUE_FLAG_DYING] = "DYING",
- [QUEUE_FLAG_BYPASS] = "BYPASS",
- [QUEUE_FLAG_BIDI] = "BIDI",
- [QUEUE_FLAG_NOMERGES] = "NOMERGES",
- [QUEUE_FLAG_SAME_COMP] = "SAME_COMP",
- [QUEUE_FLAG_FAIL_IO] = "FAIL_IO",
- [QUEUE_FLAG_STACKABLE] = "STACKABLE",
- [QUEUE_FLAG_NONROT] = "NONROT",
- [QUEUE_FLAG_IO_STAT] = "IO_STAT",
- [QUEUE_FLAG_DISCARD] = "DISCARD",
- [QUEUE_FLAG_NOXMERGES] = "NOXMERGES",
- [QUEUE_FLAG_ADD_RANDOM] = "ADD_RANDOM",
- [QUEUE_FLAG_SECERASE] = "SECERASE",
- [QUEUE_FLAG_SAME_FORCE] = "SAME_FORCE",
- [QUEUE_FLAG_DEAD] = "DEAD",
- [QUEUE_FLAG_INIT_DONE] = "INIT_DONE",
- [QUEUE_FLAG_NO_SG_MERGE] = "NO_SG_MERGE",
- [QUEUE_FLAG_POLL] = "POLL",
- [QUEUE_FLAG_WC] = "WC",
- [QUEUE_FLAG_FUA] = "FUA",
- [QUEUE_FLAG_FLUSH_NQ] = "FLUSH_NQ",
- [QUEUE_FLAG_DAX] = "DAX",
- [QUEUE_FLAG_STATS] = "STATS",
- [QUEUE_FLAG_POLL_STATS] = "POLL_STATS",
- [QUEUE_FLAG_REGISTERED] = "REGISTERED",
-};
-
-static int blk_queue_flags_show(struct seq_file *m, void *v)
-{
- struct request_queue *q = m->private;
+ QUEUE_FLAG_NAME(QUEUED),
+ QUEUE_FLAG_NAME(STOPPED),
+ QUEUE_FLAG_NAME(SYNCFULL),
+ QUEUE_FLAG_NAME(ASYNCFULL),
+ QUEUE_FLAG_NAME(DYING),
+ QUEUE_FLAG_NAME(BYPASS),
+ QUEUE_FLAG_NAME(BIDI),
+ QUEUE_FLAG_NAME(NOMERGES),
+ QUEUE_FLAG_NAME(SAME_COMP),
+ QUEUE_FLAG_NAME(FAIL_IO),
+ QUEUE_FLAG_NAME(STACKABLE),
+ QUEUE_FLAG_NAME(NONROT),
+ QUEUE_FLAG_NAME(IO_STAT),
+ QUEUE_FLAG_NAME(DISCARD),
+ QUEUE_FLAG_NAME(NOXMERGES),
+ QUEUE_FLAG_NAME(ADD_RANDOM),
+ QUEUE_FLAG_NAME(SECERASE),
+ QUEUE_FLAG_NAME(SAME_FORCE),
+ QUEUE_FLAG_NAME(DEAD),
+ QUEUE_FLAG_NAME(INIT_DONE),
+ QUEUE_FLAG_NAME(NO_SG_MERGE),
+ QUEUE_FLAG_NAME(POLL),
+ QUEUE_FLAG_NAME(WC),
+ QUEUE_FLAG_NAME(FUA),
+ QUEUE_FLAG_NAME(FLUSH_NQ),
+ QUEUE_FLAG_NAME(DAX),
+ QUEUE_FLAG_NAME(STATS),
+ QUEUE_FLAG_NAME(POLL_STATS),
+ QUEUE_FLAG_NAME(REGISTERED),
+};
+#undef QUEUE_FLAG_NAME
+
+static int queue_state_show(void *data, struct seq_file *m)
+{
+ struct request_queue *q = data;
blk_flags_show(m, q->queue_flags, blk_queue_flag_name,
ARRAY_SIZE(blk_queue_flag_name));
return 0;
}
-static ssize_t blk_queue_flags_store(struct file *file, const char __user *ubuf,
- size_t len, loff_t *offp)
+static ssize_t queue_state_write(void *data, const char __user *buf,
+ size_t count, loff_t *ppos)
{
- struct request_queue *q = file_inode(file)->i_private;
- char op[16] = { }, *s;
+ struct request_queue *q = data;
+ char opbuf[16] = { }, *op;
+
+ /*
+ * The "state" attribute is removed after blk_cleanup_queue() has called
+ * blk_mq_free_queue(). Return if QUEUE_FLAG_DEAD has been set to avoid
+ * triggering a use-after-free.
+ */
+ if (blk_queue_dead(q))
+ return -ENOENT;
- len = min(len, sizeof(op) - 1);
- if (copy_from_user(op, ubuf, len))
+ if (count >= sizeof(opbuf)) {
+ pr_err("%s: operation too long\n", __func__);
+ goto inval;
+ }
+
+ if (copy_from_user(opbuf, buf, count))
return -EFAULT;
- s = op;
- strsep(&s, " \t\n"); /* strip trailing whitespace */
+ op = strstrip(opbuf);
if (strcmp(op, "run") == 0) {
blk_mq_run_hw_queues(q, true);
} else if (strcmp(op, "start") == 0) {
blk_mq_start_stopped_hw_queues(q, true);
} else {
- pr_err("%s: unsupported operation %s. Use either 'run' or 'start'\n",
- __func__, op);
+ pr_err("%s: unsupported operation '%s'\n", __func__, op);
+inval:
+ pr_err("%s: use either 'run' or 'start'\n", __func__);
return -EINVAL;
}
- return len;
-}
-
-static int blk_queue_flags_open(struct inode *inode, struct file *file)
-{
- return single_open(file, blk_queue_flags_show, inode->i_private);
+ return count;
}
-static const struct file_operations blk_queue_flags_fops = {
- .open = blk_queue_flags_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
- .write = blk_queue_flags_store,
-};
-
static void print_stat(struct seq_file *m, struct blk_rq_stat *stat)
{
if (stat->nr_samples) {
}
}
-static int queue_poll_stat_show(struct seq_file *m, void *v)
+static int queue_poll_stat_show(void *data, struct seq_file *m)
{
- struct request_queue *q = m->private;
+ struct request_queue *q = data;
int bucket;
for (bucket = 0; bucket < BLK_MQ_POLL_STATS_BKTS/2; bucket++) {
return 0;
}
-static int queue_poll_stat_open(struct inode *inode, struct file *file)
-{
- return single_open(file, queue_poll_stat_show, inode->i_private);
-}
-
-static const struct file_operations queue_poll_stat_fops = {
- .open = queue_poll_stat_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
+#define HCTX_STATE_NAME(name) [BLK_MQ_S_##name] = #name
static const char *const hctx_state_name[] = {
- [BLK_MQ_S_STOPPED] = "STOPPED",
- [BLK_MQ_S_TAG_ACTIVE] = "TAG_ACTIVE",
- [BLK_MQ_S_SCHED_RESTART] = "SCHED_RESTART",
- [BLK_MQ_S_TAG_WAITING] = "TAG_WAITING",
-
+ HCTX_STATE_NAME(STOPPED),
+ HCTX_STATE_NAME(TAG_ACTIVE),
+ HCTX_STATE_NAME(SCHED_RESTART),
+ HCTX_STATE_NAME(TAG_WAITING),
+ HCTX_STATE_NAME(START_ON_RUN),
};
-static int hctx_state_show(struct seq_file *m, void *v)
+#undef HCTX_STATE_NAME
+
+static int hctx_state_show(void *data, struct seq_file *m)
{
- struct blk_mq_hw_ctx *hctx = m->private;
+ struct blk_mq_hw_ctx *hctx = data;
blk_flags_show(m, hctx->state, hctx_state_name,
ARRAY_SIZE(hctx_state_name));
return 0;
}
-static int hctx_state_open(struct inode *inode, struct file *file)
-{
- return single_open(file, hctx_state_show, inode->i_private);
-}
-
-static const struct file_operations hctx_state_fops = {
- .open = hctx_state_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
+#define BLK_TAG_ALLOC_NAME(name) [BLK_TAG_ALLOC_##name] = #name
static const char *const alloc_policy_name[] = {
- [BLK_TAG_ALLOC_FIFO] = "fifo",
- [BLK_TAG_ALLOC_RR] = "rr",
+ BLK_TAG_ALLOC_NAME(FIFO),
+ BLK_TAG_ALLOC_NAME(RR),
};
+#undef BLK_TAG_ALLOC_NAME
+#define HCTX_FLAG_NAME(name) [ilog2(BLK_MQ_F_##name)] = #name
static const char *const hctx_flag_name[] = {
- [ilog2(BLK_MQ_F_SHOULD_MERGE)] = "SHOULD_MERGE",
- [ilog2(BLK_MQ_F_TAG_SHARED)] = "TAG_SHARED",
- [ilog2(BLK_MQ_F_SG_MERGE)] = "SG_MERGE",
- [ilog2(BLK_MQ_F_BLOCKING)] = "BLOCKING",
- [ilog2(BLK_MQ_F_NO_SCHED)] = "NO_SCHED",
+ HCTX_FLAG_NAME(SHOULD_MERGE),
+ HCTX_FLAG_NAME(TAG_SHARED),
+ HCTX_FLAG_NAME(SG_MERGE),
+ HCTX_FLAG_NAME(BLOCKING),
+ HCTX_FLAG_NAME(NO_SCHED),
};
+#undef HCTX_FLAG_NAME
-static int hctx_flags_show(struct seq_file *m, void *v)
+static int hctx_flags_show(void *data, struct seq_file *m)
{
- struct blk_mq_hw_ctx *hctx = m->private;
+ struct blk_mq_hw_ctx *hctx = data;
const int alloc_policy = BLK_MQ_FLAG_TO_ALLOC_POLICY(hctx->flags);
seq_puts(m, "alloc_policy=");
return 0;
}
-static int hctx_flags_open(struct inode *inode, struct file *file)
-{
- return single_open(file, hctx_flags_show, inode->i_private);
-}
-
-static const struct file_operations hctx_flags_fops = {
- .open = hctx_flags_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
+#define REQ_OP_NAME(name) [REQ_OP_##name] = #name
static const char *const op_name[] = {
- [REQ_OP_READ] = "READ",
- [REQ_OP_WRITE] = "WRITE",
- [REQ_OP_FLUSH] = "FLUSH",
- [REQ_OP_DISCARD] = "DISCARD",
- [REQ_OP_ZONE_REPORT] = "ZONE_REPORT",
- [REQ_OP_SECURE_ERASE] = "SECURE_ERASE",
- [REQ_OP_ZONE_RESET] = "ZONE_RESET",
- [REQ_OP_WRITE_SAME] = "WRITE_SAME",
- [REQ_OP_WRITE_ZEROES] = "WRITE_ZEROES",
- [REQ_OP_SCSI_IN] = "SCSI_IN",
- [REQ_OP_SCSI_OUT] = "SCSI_OUT",
- [REQ_OP_DRV_IN] = "DRV_IN",
- [REQ_OP_DRV_OUT] = "DRV_OUT",
-};
-
+ REQ_OP_NAME(READ),
+ REQ_OP_NAME(WRITE),
+ REQ_OP_NAME(FLUSH),
+ REQ_OP_NAME(DISCARD),
+ REQ_OP_NAME(ZONE_REPORT),
+ REQ_OP_NAME(SECURE_ERASE),
+ REQ_OP_NAME(ZONE_RESET),
+ REQ_OP_NAME(WRITE_SAME),
+ REQ_OP_NAME(WRITE_ZEROES),
+ REQ_OP_NAME(SCSI_IN),
+ REQ_OP_NAME(SCSI_OUT),
+ REQ_OP_NAME(DRV_IN),
+ REQ_OP_NAME(DRV_OUT),
+};
+#undef REQ_OP_NAME
+
+#define CMD_FLAG_NAME(name) [__REQ_##name] = #name
static const char *const cmd_flag_name[] = {
- [__REQ_FAILFAST_DEV] = "FAILFAST_DEV",
- [__REQ_FAILFAST_TRANSPORT] = "FAILFAST_TRANSPORT",
- [__REQ_FAILFAST_DRIVER] = "FAILFAST_DRIVER",
- [__REQ_SYNC] = "SYNC",
- [__REQ_META] = "META",
- [__REQ_PRIO] = "PRIO",
- [__REQ_NOMERGE] = "NOMERGE",
- [__REQ_IDLE] = "IDLE",
- [__REQ_INTEGRITY] = "INTEGRITY",
- [__REQ_FUA] = "FUA",
- [__REQ_PREFLUSH] = "PREFLUSH",
- [__REQ_RAHEAD] = "RAHEAD",
- [__REQ_BACKGROUND] = "BACKGROUND",
- [__REQ_NR_BITS] = "NR_BITS",
-};
-
+ CMD_FLAG_NAME(FAILFAST_DEV),
+ CMD_FLAG_NAME(FAILFAST_TRANSPORT),
+ CMD_FLAG_NAME(FAILFAST_DRIVER),
+ CMD_FLAG_NAME(SYNC),
+ CMD_FLAG_NAME(META),
+ CMD_FLAG_NAME(PRIO),
+ CMD_FLAG_NAME(NOMERGE),
+ CMD_FLAG_NAME(IDLE),
+ CMD_FLAG_NAME(INTEGRITY),
+ CMD_FLAG_NAME(FUA),
+ CMD_FLAG_NAME(PREFLUSH),
+ CMD_FLAG_NAME(RAHEAD),
+ CMD_FLAG_NAME(BACKGROUND),
+ CMD_FLAG_NAME(NOUNMAP),
+};
+#undef CMD_FLAG_NAME
+
+#define RQF_NAME(name) [ilog2((__force u32)RQF_##name)] = #name
static const char *const rqf_name[] = {
- [ilog2((__force u32)RQF_SORTED)] = "SORTED",
- [ilog2((__force u32)RQF_STARTED)] = "STARTED",
- [ilog2((__force u32)RQF_QUEUED)] = "QUEUED",
- [ilog2((__force u32)RQF_SOFTBARRIER)] = "SOFTBARRIER",
- [ilog2((__force u32)RQF_FLUSH_SEQ)] = "FLUSH_SEQ",
- [ilog2((__force u32)RQF_MIXED_MERGE)] = "MIXED_MERGE",
- [ilog2((__force u32)RQF_MQ_INFLIGHT)] = "MQ_INFLIGHT",
- [ilog2((__force u32)RQF_DONTPREP)] = "DONTPREP",
- [ilog2((__force u32)RQF_PREEMPT)] = "PREEMPT",
- [ilog2((__force u32)RQF_COPY_USER)] = "COPY_USER",
- [ilog2((__force u32)RQF_FAILED)] = "FAILED",
- [ilog2((__force u32)RQF_QUIET)] = "QUIET",
- [ilog2((__force u32)RQF_ELVPRIV)] = "ELVPRIV",
- [ilog2((__force u32)RQF_IO_STAT)] = "IO_STAT",
- [ilog2((__force u32)RQF_ALLOCED)] = "ALLOCED",
- [ilog2((__force u32)RQF_PM)] = "PM",
- [ilog2((__force u32)RQF_HASHED)] = "HASHED",
- [ilog2((__force u32)RQF_STATS)] = "STATS",
- [ilog2((__force u32)RQF_SPECIAL_PAYLOAD)] = "SPECIAL_PAYLOAD",
-};
-
-static int blk_mq_debugfs_rq_show(struct seq_file *m, void *v)
+ RQF_NAME(SORTED),
+ RQF_NAME(STARTED),
+ RQF_NAME(QUEUED),
+ RQF_NAME(SOFTBARRIER),
+ RQF_NAME(FLUSH_SEQ),
+ RQF_NAME(MIXED_MERGE),
+ RQF_NAME(MQ_INFLIGHT),
+ RQF_NAME(DONTPREP),
+ RQF_NAME(PREEMPT),
+ RQF_NAME(COPY_USER),
+ RQF_NAME(FAILED),
+ RQF_NAME(QUIET),
+ RQF_NAME(ELVPRIV),
+ RQF_NAME(IO_STAT),
+ RQF_NAME(ALLOCED),
+ RQF_NAME(PM),
+ RQF_NAME(HASHED),
+ RQF_NAME(STATS),
+ RQF_NAME(SPECIAL_PAYLOAD),
+};
+#undef RQF_NAME
+
+int __blk_mq_debugfs_rq_show(struct seq_file *m, struct request *rq)
{
- struct request *rq = list_entry_rq(v);
const struct blk_mq_ops *const mq_ops = rq->q->mq_ops;
const unsigned int op = rq->cmd_flags & REQ_OP_MASK;
seq_puts(m, "}\n");
return 0;
}
+EXPORT_SYMBOL_GPL(__blk_mq_debugfs_rq_show);
+
+int blk_mq_debugfs_rq_show(struct seq_file *m, void *v)
+{
+ return __blk_mq_debugfs_rq_show(m, list_entry_rq(v));
+}
+EXPORT_SYMBOL_GPL(blk_mq_debugfs_rq_show);
static void *hctx_dispatch_start(struct seq_file *m, loff_t *pos)
__acquires(&hctx->lock)
.show = blk_mq_debugfs_rq_show,
};
-static int hctx_dispatch_open(struct inode *inode, struct file *file)
-{
- return blk_mq_debugfs_seq_open(inode, file, &hctx_dispatch_seq_ops);
-}
-
-static const struct file_operations hctx_dispatch_fops = {
- .open = hctx_dispatch_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release,
-};
-
-static int hctx_ctx_map_show(struct seq_file *m, void *v)
+static int hctx_ctx_map_show(void *data, struct seq_file *m)
{
- struct blk_mq_hw_ctx *hctx = m->private;
+ struct blk_mq_hw_ctx *hctx = data;
sbitmap_bitmap_show(&hctx->ctx_map, m);
return 0;
}
-static int hctx_ctx_map_open(struct inode *inode, struct file *file)
-{
- return single_open(file, hctx_ctx_map_show, inode->i_private);
-}
-
-static const struct file_operations hctx_ctx_map_fops = {
- .open = hctx_ctx_map_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
static void blk_mq_debugfs_tags_show(struct seq_file *m,
struct blk_mq_tags *tags)
{
}
}
-static int hctx_tags_show(struct seq_file *m, void *v)
+static int hctx_tags_show(void *data, struct seq_file *m)
{
- struct blk_mq_hw_ctx *hctx = m->private;
+ struct blk_mq_hw_ctx *hctx = data;
struct request_queue *q = hctx->queue;
int res;
return res;
}
-static int hctx_tags_open(struct inode *inode, struct file *file)
-{
- return single_open(file, hctx_tags_show, inode->i_private);
-}
-
-static const struct file_operations hctx_tags_fops = {
- .open = hctx_tags_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-static int hctx_tags_bitmap_show(struct seq_file *m, void *v)
+static int hctx_tags_bitmap_show(void *data, struct seq_file *m)
{
- struct blk_mq_hw_ctx *hctx = m->private;
+ struct blk_mq_hw_ctx *hctx = data;
struct request_queue *q = hctx->queue;
int res;
return res;
}
-static int hctx_tags_bitmap_open(struct inode *inode, struct file *file)
+static int hctx_sched_tags_show(void *data, struct seq_file *m)
{
- return single_open(file, hctx_tags_bitmap_show, inode->i_private);
-}
-
-static const struct file_operations hctx_tags_bitmap_fops = {
- .open = hctx_tags_bitmap_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-static int hctx_sched_tags_show(struct seq_file *m, void *v)
-{
- struct blk_mq_hw_ctx *hctx = m->private;
+ struct blk_mq_hw_ctx *hctx = data;
struct request_queue *q = hctx->queue;
int res;
return res;
}
-static int hctx_sched_tags_open(struct inode *inode, struct file *file)
+static int hctx_sched_tags_bitmap_show(void *data, struct seq_file *m)
{
- return single_open(file, hctx_sched_tags_show, inode->i_private);
-}
-
-static const struct file_operations hctx_sched_tags_fops = {
- .open = hctx_sched_tags_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-static int hctx_sched_tags_bitmap_show(struct seq_file *m, void *v)
-{
- struct blk_mq_hw_ctx *hctx = m->private;
+ struct blk_mq_hw_ctx *hctx = data;
struct request_queue *q = hctx->queue;
int res;
return res;
}
-static int hctx_sched_tags_bitmap_open(struct inode *inode, struct file *file)
-{
- return single_open(file, hctx_sched_tags_bitmap_show, inode->i_private);
-}
-
-static const struct file_operations hctx_sched_tags_bitmap_fops = {
- .open = hctx_sched_tags_bitmap_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-static int hctx_io_poll_show(struct seq_file *m, void *v)
+static int hctx_io_poll_show(void *data, struct seq_file *m)
{
- struct blk_mq_hw_ctx *hctx = m->private;
+ struct blk_mq_hw_ctx *hctx = data;
seq_printf(m, "considered=%lu\n", hctx->poll_considered);
seq_printf(m, "invoked=%lu\n", hctx->poll_invoked);
return 0;
}
-static int hctx_io_poll_open(struct inode *inode, struct file *file)
-{
- return single_open(file, hctx_io_poll_show, inode->i_private);
-}
-
-static ssize_t hctx_io_poll_write(struct file *file, const char __user *buf,
+static ssize_t hctx_io_poll_write(void *data, const char __user *buf,
size_t count, loff_t *ppos)
{
- struct seq_file *m = file->private_data;
- struct blk_mq_hw_ctx *hctx = m->private;
+ struct blk_mq_hw_ctx *hctx = data;
hctx->poll_considered = hctx->poll_invoked = hctx->poll_success = 0;
return count;
}
-static const struct file_operations hctx_io_poll_fops = {
- .open = hctx_io_poll_open,
- .read = seq_read,
- .write = hctx_io_poll_write,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-static int hctx_dispatched_show(struct seq_file *m, void *v)
+static int hctx_dispatched_show(void *data, struct seq_file *m)
{
- struct blk_mq_hw_ctx *hctx = m->private;
+ struct blk_mq_hw_ctx *hctx = data;
int i;
seq_printf(m, "%8u\t%lu\n", 0U, hctx->dispatched[0]);
return 0;
}
-static int hctx_dispatched_open(struct inode *inode, struct file *file)
-{
- return single_open(file, hctx_dispatched_show, inode->i_private);
-}
-
-static ssize_t hctx_dispatched_write(struct file *file, const char __user *buf,
+static ssize_t hctx_dispatched_write(void *data, const char __user *buf,
size_t count, loff_t *ppos)
{
- struct seq_file *m = file->private_data;
- struct blk_mq_hw_ctx *hctx = m->private;
+ struct blk_mq_hw_ctx *hctx = data;
int i;
for (i = 0; i < BLK_MQ_MAX_DISPATCH_ORDER; i++)
return count;
}
-static const struct file_operations hctx_dispatched_fops = {
- .open = hctx_dispatched_open,
- .read = seq_read,
- .write = hctx_dispatched_write,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-static int hctx_queued_show(struct seq_file *m, void *v)
+static int hctx_queued_show(void *data, struct seq_file *m)
{
- struct blk_mq_hw_ctx *hctx = m->private;
+ struct blk_mq_hw_ctx *hctx = data;
seq_printf(m, "%lu\n", hctx->queued);
return 0;
}
-static int hctx_queued_open(struct inode *inode, struct file *file)
-{
- return single_open(file, hctx_queued_show, inode->i_private);
-}
-
-static ssize_t hctx_queued_write(struct file *file, const char __user *buf,
+static ssize_t hctx_queued_write(void *data, const char __user *buf,
size_t count, loff_t *ppos)
{
- struct seq_file *m = file->private_data;
- struct blk_mq_hw_ctx *hctx = m->private;
+ struct blk_mq_hw_ctx *hctx = data;
hctx->queued = 0;
return count;
}
-static const struct file_operations hctx_queued_fops = {
- .open = hctx_queued_open,
- .read = seq_read,
- .write = hctx_queued_write,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-static int hctx_run_show(struct seq_file *m, void *v)
+static int hctx_run_show(void *data, struct seq_file *m)
{
- struct blk_mq_hw_ctx *hctx = m->private;
+ struct blk_mq_hw_ctx *hctx = data;
seq_printf(m, "%lu\n", hctx->run);
return 0;
}
-static int hctx_run_open(struct inode *inode, struct file *file)
+static ssize_t hctx_run_write(void *data, const char __user *buf, size_t count,
+ loff_t *ppos)
{
- return single_open(file, hctx_run_show, inode->i_private);
-}
-
-static ssize_t hctx_run_write(struct file *file, const char __user *buf,
- size_t count, loff_t *ppos)
-{
- struct seq_file *m = file->private_data;
- struct blk_mq_hw_ctx *hctx = m->private;
+ struct blk_mq_hw_ctx *hctx = data;
hctx->run = 0;
return count;
}
-static const struct file_operations hctx_run_fops = {
- .open = hctx_run_open,
- .read = seq_read,
- .write = hctx_run_write,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-static int hctx_active_show(struct seq_file *m, void *v)
+static int hctx_active_show(void *data, struct seq_file *m)
{
- struct blk_mq_hw_ctx *hctx = m->private;
+ struct blk_mq_hw_ctx *hctx = data;
seq_printf(m, "%d\n", atomic_read(&hctx->nr_active));
return 0;
}
-static int hctx_active_open(struct inode *inode, struct file *file)
-{
- return single_open(file, hctx_active_show, inode->i_private);
-}
-
-static const struct file_operations hctx_active_fops = {
- .open = hctx_active_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
static void *ctx_rq_list_start(struct seq_file *m, loff_t *pos)
__acquires(&ctx->lock)
{
.stop = ctx_rq_list_stop,
.show = blk_mq_debugfs_rq_show,
};
-
-static int ctx_rq_list_open(struct inode *inode, struct file *file)
+static int ctx_dispatched_show(void *data, struct seq_file *m)
{
- return blk_mq_debugfs_seq_open(inode, file, &ctx_rq_list_seq_ops);
-}
-
-static const struct file_operations ctx_rq_list_fops = {
- .open = ctx_rq_list_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release,
-};
-
-static int ctx_dispatched_show(struct seq_file *m, void *v)
-{
- struct blk_mq_ctx *ctx = m->private;
+ struct blk_mq_ctx *ctx = data;
seq_printf(m, "%lu %lu\n", ctx->rq_dispatched[1], ctx->rq_dispatched[0]);
return 0;
}
-static int ctx_dispatched_open(struct inode *inode, struct file *file)
-{
- return single_open(file, ctx_dispatched_show, inode->i_private);
-}
-
-static ssize_t ctx_dispatched_write(struct file *file, const char __user *buf,
+static ssize_t ctx_dispatched_write(void *data, const char __user *buf,
size_t count, loff_t *ppos)
{
- struct seq_file *m = file->private_data;
- struct blk_mq_ctx *ctx = m->private;
+ struct blk_mq_ctx *ctx = data;
ctx->rq_dispatched[0] = ctx->rq_dispatched[1] = 0;
return count;
}
-static const struct file_operations ctx_dispatched_fops = {
- .open = ctx_dispatched_open,
- .read = seq_read,
- .write = ctx_dispatched_write,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-static int ctx_merged_show(struct seq_file *m, void *v)
+static int ctx_merged_show(void *data, struct seq_file *m)
{
- struct blk_mq_ctx *ctx = m->private;
+ struct blk_mq_ctx *ctx = data;
seq_printf(m, "%lu\n", ctx->rq_merged);
return 0;
}
-static int ctx_merged_open(struct inode *inode, struct file *file)
+static ssize_t ctx_merged_write(void *data, const char __user *buf,
+ size_t count, loff_t *ppos)
{
- return single_open(file, ctx_merged_show, inode->i_private);
-}
-
-static ssize_t ctx_merged_write(struct file *file, const char __user *buf,
- size_t count, loff_t *ppos)
-{
- struct seq_file *m = file->private_data;
- struct blk_mq_ctx *ctx = m->private;
+ struct blk_mq_ctx *ctx = data;
ctx->rq_merged = 0;
return count;
}
-static const struct file_operations ctx_merged_fops = {
- .open = ctx_merged_open,
- .read = seq_read,
- .write = ctx_merged_write,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-static int ctx_completed_show(struct seq_file *m, void *v)
+static int ctx_completed_show(void *data, struct seq_file *m)
{
- struct blk_mq_ctx *ctx = m->private;
+ struct blk_mq_ctx *ctx = data;
seq_printf(m, "%lu %lu\n", ctx->rq_completed[1], ctx->rq_completed[0]);
return 0;
}
-static int ctx_completed_open(struct inode *inode, struct file *file)
+static ssize_t ctx_completed_write(void *data, const char __user *buf,
+ size_t count, loff_t *ppos)
{
- return single_open(file, ctx_completed_show, inode->i_private);
+ struct blk_mq_ctx *ctx = data;
+
+ ctx->rq_completed[0] = ctx->rq_completed[1] = 0;
+ return count;
}
-static ssize_t ctx_completed_write(struct file *file, const char __user *buf,
- size_t count, loff_t *ppos)
+static int blk_mq_debugfs_show(struct seq_file *m, void *v)
+{
+ const struct blk_mq_debugfs_attr *attr = m->private;
+ void *data = d_inode(m->file->f_path.dentry->d_parent)->i_private;
+
+ return attr->show(data, m);
+}
+
+static ssize_t blk_mq_debugfs_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
{
struct seq_file *m = file->private_data;
- struct blk_mq_ctx *ctx = m->private;
+ const struct blk_mq_debugfs_attr *attr = m->private;
+ void *data = d_inode(file->f_path.dentry->d_parent)->i_private;
- ctx->rq_completed[0] = ctx->rq_completed[1] = 0;
- return count;
+ if (!attr->write)
+ return -EPERM;
+
+ return attr->write(data, buf, count, ppos);
+}
+
+static int blk_mq_debugfs_open(struct inode *inode, struct file *file)
+{
+ const struct blk_mq_debugfs_attr *attr = inode->i_private;
+ void *data = d_inode(file->f_path.dentry->d_parent)->i_private;
+ struct seq_file *m;
+ int ret;
+
+ if (attr->seq_ops) {
+ ret = seq_open(file, attr->seq_ops);
+ if (!ret) {
+ m = file->private_data;
+ m->private = data;
+ }
+ return ret;
+ }
+
+ if (WARN_ON_ONCE(!attr->show))
+ return -EPERM;
+
+ return single_open(file, blk_mq_debugfs_show, inode->i_private);
+}
+
+static int blk_mq_debugfs_release(struct inode *inode, struct file *file)
+{
+ const struct blk_mq_debugfs_attr *attr = inode->i_private;
+
+ if (attr->show)
+ return single_release(inode, file);
+ else
+ return seq_release(inode, file);
}
-static const struct file_operations ctx_completed_fops = {
- .open = ctx_completed_open,
+const struct file_operations blk_mq_debugfs_fops = {
+ .open = blk_mq_debugfs_open,
.read = seq_read,
- .write = ctx_completed_write,
+ .write = blk_mq_debugfs_write,
.llseek = seq_lseek,
- .release = single_release,
+ .release = blk_mq_debugfs_release,
};
static const struct blk_mq_debugfs_attr blk_mq_debugfs_queue_attrs[] = {
- {"poll_stat", 0400, &queue_poll_stat_fops},
- {"state", 0600, &blk_queue_flags_fops},
+ {"poll_stat", 0400, queue_poll_stat_show},
+ {"state", 0600, queue_state_show, queue_state_write},
{},
};
static const struct blk_mq_debugfs_attr blk_mq_debugfs_hctx_attrs[] = {
- {"state", 0400, &hctx_state_fops},
- {"flags", 0400, &hctx_flags_fops},
- {"dispatch", 0400, &hctx_dispatch_fops},
- {"ctx_map", 0400, &hctx_ctx_map_fops},
- {"tags", 0400, &hctx_tags_fops},
- {"tags_bitmap", 0400, &hctx_tags_bitmap_fops},
- {"sched_tags", 0400, &hctx_sched_tags_fops},
- {"sched_tags_bitmap", 0400, &hctx_sched_tags_bitmap_fops},
- {"io_poll", 0600, &hctx_io_poll_fops},
- {"dispatched", 0600, &hctx_dispatched_fops},
- {"queued", 0600, &hctx_queued_fops},
- {"run", 0600, &hctx_run_fops},
- {"active", 0400, &hctx_active_fops},
+ {"state", 0400, hctx_state_show},
+ {"flags", 0400, hctx_flags_show},
+ {"dispatch", 0400, .seq_ops = &hctx_dispatch_seq_ops},
+ {"ctx_map", 0400, hctx_ctx_map_show},
+ {"tags", 0400, hctx_tags_show},
+ {"tags_bitmap", 0400, hctx_tags_bitmap_show},
+ {"sched_tags", 0400, hctx_sched_tags_show},
+ {"sched_tags_bitmap", 0400, hctx_sched_tags_bitmap_show},
+ {"io_poll", 0600, hctx_io_poll_show, hctx_io_poll_write},
+ {"dispatched", 0600, hctx_dispatched_show, hctx_dispatched_write},
+ {"queued", 0600, hctx_queued_show, hctx_queued_write},
+ {"run", 0600, hctx_run_show, hctx_run_write},
+ {"active", 0400, hctx_active_show},
{},
};
static const struct blk_mq_debugfs_attr blk_mq_debugfs_ctx_attrs[] = {
- {"rq_list", 0400, &ctx_rq_list_fops},
- {"dispatched", 0600, &ctx_dispatched_fops},
- {"merged", 0600, &ctx_merged_fops},
- {"completed", 0600, &ctx_completed_fops},
+ {"rq_list", 0400, .seq_ops = &ctx_rq_list_seq_ops},
+ {"dispatched", 0600, ctx_dispatched_show, ctx_dispatched_write},
+ {"merged", 0600, ctx_merged_show, ctx_merged_write},
+ {"completed", 0600, ctx_completed_show, ctx_completed_write},
{},
};
+static bool debugfs_create_files(struct dentry *parent, void *data,
+ const struct blk_mq_debugfs_attr *attr)
+{
+ d_inode(parent)->i_private = data;
+
+ for (; attr->name; attr++) {
+ if (!debugfs_create_file(attr->name, attr->mode, parent,
+ (void *)attr, &blk_mq_debugfs_fops))
+ return false;
+ }
+ return true;
+}
+
int blk_mq_debugfs_register(struct request_queue *q)
{
+ struct blk_mq_hw_ctx *hctx;
+ int i;
+
if (!blk_debugfs_root)
return -ENOENT;
q->debugfs_dir = debugfs_create_dir(kobject_name(q->kobj.parent),
blk_debugfs_root);
if (!q->debugfs_dir)
- goto err;
+ return -ENOMEM;
- if (blk_mq_debugfs_register_mq(q))
+ if (!debugfs_create_files(q->debugfs_dir, q,
+ blk_mq_debugfs_queue_attrs))
goto err;
+ /*
+ * blk_mq_init_hctx() attempted to do this already, but q->debugfs_dir
+ * didn't exist yet (because we don't know what to name the directory
+ * until the queue is registered to a gendisk).
+ */
+ queue_for_each_hw_ctx(q, hctx, i) {
+ if (!hctx->debugfs_dir && blk_mq_debugfs_register_hctx(q, hctx))
+ goto err;
+ if (q->elevator && !hctx->sched_debugfs_dir &&
+ blk_mq_debugfs_register_sched_hctx(q, hctx))
+ goto err;
+ }
+
return 0;
err:
void blk_mq_debugfs_unregister(struct request_queue *q)
{
debugfs_remove_recursive(q->debugfs_dir);
- q->mq_debugfs_dir = NULL;
+ q->sched_debugfs_dir = NULL;
q->debugfs_dir = NULL;
}
-static bool debugfs_create_files(struct dentry *parent, void *data,
- const struct blk_mq_debugfs_attr *attr)
-{
- for (; attr->name; attr++) {
- if (!debugfs_create_file(attr->name, attr->mode, parent,
- data, attr->fops))
- return false;
- }
- return true;
-}
-
-static int blk_mq_debugfs_register_ctx(struct request_queue *q,
- struct blk_mq_ctx *ctx,
- struct dentry *hctx_dir)
+static int blk_mq_debugfs_register_ctx(struct blk_mq_hw_ctx *hctx,
+ struct blk_mq_ctx *ctx)
{
struct dentry *ctx_dir;
char name[20];
snprintf(name, sizeof(name), "cpu%u", ctx->cpu);
- ctx_dir = debugfs_create_dir(name, hctx_dir);
+ ctx_dir = debugfs_create_dir(name, hctx->debugfs_dir);
if (!ctx_dir)
return -ENOMEM;
return 0;
}
-static int blk_mq_debugfs_register_hctx(struct request_queue *q,
- struct blk_mq_hw_ctx *hctx)
+int blk_mq_debugfs_register_hctx(struct request_queue *q,
+ struct blk_mq_hw_ctx *hctx)
{
struct blk_mq_ctx *ctx;
- struct dentry *hctx_dir;
char name[20];
int i;
- snprintf(name, sizeof(name), "%u", hctx->queue_num);
- hctx_dir = debugfs_create_dir(name, q->mq_debugfs_dir);
- if (!hctx_dir)
- return -ENOMEM;
+ if (!q->debugfs_dir)
+ return -ENOENT;
- if (!debugfs_create_files(hctx_dir, hctx, blk_mq_debugfs_hctx_attrs))
+ snprintf(name, sizeof(name), "hctx%u", hctx->queue_num);
+ hctx->debugfs_dir = debugfs_create_dir(name, q->debugfs_dir);
+ if (!hctx->debugfs_dir)
return -ENOMEM;
+ if (!debugfs_create_files(hctx->debugfs_dir, hctx,
+ blk_mq_debugfs_hctx_attrs))
+ goto err;
+
hctx_for_each_ctx(hctx, ctx, i) {
- if (blk_mq_debugfs_register_ctx(q, ctx, hctx_dir))
+ if (blk_mq_debugfs_register_ctx(hctx, ctx))
+ goto err;
+ }
+
+ return 0;
+
+err:
+ blk_mq_debugfs_unregister_hctx(hctx);
+ return -ENOMEM;
+}
+
+void blk_mq_debugfs_unregister_hctx(struct blk_mq_hw_ctx *hctx)
+{
+ debugfs_remove_recursive(hctx->debugfs_dir);
+ hctx->sched_debugfs_dir = NULL;
+ hctx->debugfs_dir = NULL;
+}
+
+int blk_mq_debugfs_register_hctxs(struct request_queue *q)
+{
+ struct blk_mq_hw_ctx *hctx;
+ int i;
+
+ queue_for_each_hw_ctx(q, hctx, i) {
+ if (blk_mq_debugfs_register_hctx(q, hctx))
return -ENOMEM;
}
return 0;
}
-int blk_mq_debugfs_register_mq(struct request_queue *q)
+void blk_mq_debugfs_unregister_hctxs(struct request_queue *q)
{
struct blk_mq_hw_ctx *hctx;
int i;
+ queue_for_each_hw_ctx(q, hctx, i)
+ blk_mq_debugfs_unregister_hctx(hctx);
+}
+
+int blk_mq_debugfs_register_sched(struct request_queue *q)
+{
+ struct elevator_type *e = q->elevator->type;
+
if (!q->debugfs_dir)
return -ENOENT;
- q->mq_debugfs_dir = debugfs_create_dir("mq", q->debugfs_dir);
- if (!q->mq_debugfs_dir)
- goto err;
+ if (!e->queue_debugfs_attrs)
+ return 0;
- if (!debugfs_create_files(q->mq_debugfs_dir, q, blk_mq_debugfs_queue_attrs))
- goto err;
+ q->sched_debugfs_dir = debugfs_create_dir("sched", q->debugfs_dir);
+ if (!q->sched_debugfs_dir)
+ return -ENOMEM;
- queue_for_each_hw_ctx(q, hctx, i) {
- if (blk_mq_debugfs_register_hctx(q, hctx))
- goto err;
- }
+ if (!debugfs_create_files(q->sched_debugfs_dir, q,
+ e->queue_debugfs_attrs))
+ goto err;
return 0;
err:
- blk_mq_debugfs_unregister_mq(q);
+ blk_mq_debugfs_unregister_sched(q);
return -ENOMEM;
}
-void blk_mq_debugfs_unregister_mq(struct request_queue *q)
+void blk_mq_debugfs_unregister_sched(struct request_queue *q)
+{
+ debugfs_remove_recursive(q->sched_debugfs_dir);
+ q->sched_debugfs_dir = NULL;
+}
+
+int blk_mq_debugfs_register_sched_hctx(struct request_queue *q,
+ struct blk_mq_hw_ctx *hctx)
+{
+ struct elevator_type *e = q->elevator->type;
+
+ if (!hctx->debugfs_dir)
+ return -ENOENT;
+
+ if (!e->hctx_debugfs_attrs)
+ return 0;
+
+ hctx->sched_debugfs_dir = debugfs_create_dir("sched",
+ hctx->debugfs_dir);
+ if (!hctx->sched_debugfs_dir)
+ return -ENOMEM;
+
+ if (!debugfs_create_files(hctx->sched_debugfs_dir, hctx,
+ e->hctx_debugfs_attrs))
+ return -ENOMEM;
+
+ return 0;
+}
+
+void blk_mq_debugfs_unregister_sched_hctx(struct blk_mq_hw_ctx *hctx)
{
- debugfs_remove_recursive(q->mq_debugfs_dir);
- q->mq_debugfs_dir = NULL;
+ debugfs_remove_recursive(hctx->sched_debugfs_dir);
+ hctx->sched_debugfs_dir = NULL;
}
--- /dev/null
+#ifndef INT_BLK_MQ_DEBUGFS_H
+#define INT_BLK_MQ_DEBUGFS_H
+
+#ifdef CONFIG_BLK_DEBUG_FS
+
+#include <linux/seq_file.h>
+
+struct blk_mq_debugfs_attr {
+ const char *name;
+ umode_t mode;
+ int (*show)(void *, struct seq_file *);
+ ssize_t (*write)(void *, const char __user *, size_t, loff_t *);
+ /* Set either .show or .seq_ops. */
+ const struct seq_operations *seq_ops;
+};
+
+int __blk_mq_debugfs_rq_show(struct seq_file *m, struct request *rq);
+int blk_mq_debugfs_rq_show(struct seq_file *m, void *v);
+
+int blk_mq_debugfs_register(struct request_queue *q);
+void blk_mq_debugfs_unregister(struct request_queue *q);
+int blk_mq_debugfs_register_hctx(struct request_queue *q,
+ struct blk_mq_hw_ctx *hctx);
+void blk_mq_debugfs_unregister_hctx(struct blk_mq_hw_ctx *hctx);
+int blk_mq_debugfs_register_hctxs(struct request_queue *q);
+void blk_mq_debugfs_unregister_hctxs(struct request_queue *q);
+
+int blk_mq_debugfs_register_sched(struct request_queue *q);
+void blk_mq_debugfs_unregister_sched(struct request_queue *q);
+int blk_mq_debugfs_register_sched_hctx(struct request_queue *q,
+ struct blk_mq_hw_ctx *hctx);
+void blk_mq_debugfs_unregister_sched_hctx(struct blk_mq_hw_ctx *hctx);
+#else
+static inline int blk_mq_debugfs_register(struct request_queue *q)
+{
+ return 0;
+}
+
+static inline void blk_mq_debugfs_unregister(struct request_queue *q)
+{
+}
+
+static inline int blk_mq_debugfs_register_hctx(struct request_queue *q,
+ struct blk_mq_hw_ctx *hctx)
+{
+ return 0;
+}
+
+static inline void blk_mq_debugfs_unregister_hctx(struct blk_mq_hw_ctx *hctx)
+{
+}
+
+static inline int blk_mq_debugfs_register_hctxs(struct request_queue *q)
+{
+ return 0;
+}
+
+static inline void blk_mq_debugfs_unregister_hctxs(struct request_queue *q)
+{
+}
+
+static inline int blk_mq_debugfs_register_sched(struct request_queue *q)
+{
+ return 0;
+}
+
+static inline void blk_mq_debugfs_unregister_sched(struct request_queue *q)
+{
+}
+
+static inline int blk_mq_debugfs_register_sched_hctx(struct request_queue *q,
+ struct blk_mq_hw_ctx *hctx)
+{
+ return 0;
+}
+
+static inline void blk_mq_debugfs_unregister_sched_hctx(struct blk_mq_hw_ctx *hctx)
+{
+}
+#endif
+
+#endif
#include "blk.h"
#include "blk-mq.h"
+#include "blk-mq-debugfs.h"
#include "blk-mq-sched.h"
#include "blk-mq-tag.h"
#include "blk-wbt.h"
if (likely(!data->hctx))
data->hctx = blk_mq_map_queue(q, data->ctx->cpu);
- /*
- * For a reserved tag, allocate a normal request since we might
- * have driver dependencies on the value of the internal tag.
- */
- if (e && !(data->flags & BLK_MQ_REQ_RESERVED)) {
+ if (e) {
data->flags |= BLK_MQ_REQ_INTERNAL;
/*
}
}
+ blk_mq_debugfs_register_sched_hctx(q, hctx);
+
return 0;
}
if (!e)
return;
+ blk_mq_debugfs_unregister_sched_hctx(hctx);
+
if (e->type->ops.mq.exit_hctx && hctx->sched_data) {
e->type->ops.mq.exit_hctx(hctx, hctx_idx);
hctx->sched_data = NULL;
if (ret)
goto err;
- if (e->ops.mq.init_hctx) {
- queue_for_each_hw_ctx(q, hctx, i) {
+ blk_mq_debugfs_register_sched(q);
+
+ queue_for_each_hw_ctx(q, hctx, i) {
+ if (e->ops.mq.init_hctx) {
ret = e->ops.mq.init_hctx(hctx, i);
if (ret) {
eq = q->elevator;
return ret;
}
}
+ blk_mq_debugfs_register_sched_hctx(q, hctx);
}
return 0;
struct blk_mq_hw_ctx *hctx;
unsigned int i;
- if (e->type->ops.mq.exit_hctx) {
- queue_for_each_hw_ctx(q, hctx, i) {
- if (hctx->sched_data) {
- e->type->ops.mq.exit_hctx(hctx, i);
- hctx->sched_data = NULL;
- }
+ queue_for_each_hw_ctx(q, hctx, i) {
+ blk_mq_debugfs_unregister_sched_hctx(hctx);
+ if (e->type->ops.mq.exit_hctx && hctx->sched_data) {
+ e->type->ops.mq.exit_hctx(hctx, i);
+ hctx->sched_data = NULL;
}
}
+ blk_mq_debugfs_unregister_sched(q);
if (e->type->ops.mq.exit_sched)
e->type->ops.mq.exit_sched(e);
blk_mq_sched_tags_teardown(q);
queue_for_each_hw_ctx(q, hctx, i)
blk_mq_unregister_hctx(hctx);
- blk_mq_debugfs_unregister_mq(q);
-
kobject_uevent(&q->mq_kobj, KOBJ_REMOVE);
kobject_del(&q->mq_kobj);
kobject_put(&dev->kobj);
kobject_uevent(&q->mq_kobj, KOBJ_ADD);
- blk_mq_debugfs_register(q);
-
queue_for_each_hw_ctx(q, hctx, i) {
ret = blk_mq_register_hctx(hctx);
if (ret)
while (--i >= 0)
blk_mq_unregister_hctx(q->queue_hw_ctx[i]);
- blk_mq_debugfs_unregister_mq(q);
-
kobject_uevent(&q->mq_kobj, KOBJ_REMOVE);
kobject_del(&q->mq_kobj);
kobject_put(&dev->kobj);
if (!q->mq_sysfs_init_done)
goto unlock;
- blk_mq_debugfs_unregister_mq(q);
-
queue_for_each_hw_ctx(q, hctx, i)
blk_mq_unregister_hctx(hctx);
if (!q->mq_sysfs_init_done)
goto unlock;
- blk_mq_debugfs_register_mq(q);
-
queue_for_each_hw_ctx(q, hctx, i) {
ret = blk_mq_register_hctx(hctx);
if (ret)
#include <linux/blk-mq.h>
#include "blk.h"
#include "blk-mq.h"
+#include "blk-mq-debugfs.h"
#include "blk-mq-tag.h"
#include "blk-stat.h"
#include "blk-wbt.h"
static void blk_mq_poll_stats_start(struct request_queue *q);
static void blk_mq_poll_stats_fn(struct blk_stat_callback *cb);
+static void __blk_mq_stop_hw_queues(struct request_queue *q, bool sync);
static int blk_mq_poll_stats_bkt(const struct request *rq)
{
unsigned int i;
bool rcu = false;
- blk_mq_stop_hw_queues(q);
+ __blk_mq_stop_hw_queues(q, true);
queue_for_each_hw_ctx(q, hctx, i) {
if (hctx->flags & BLK_MQ_F_BLOCKING)
}
EXPORT_SYMBOL(blk_mq_queue_stopped);
-void blk_mq_stop_hw_queue(struct blk_mq_hw_ctx *hctx)
+static void __blk_mq_stop_hw_queue(struct blk_mq_hw_ctx *hctx, bool sync)
{
- cancel_delayed_work_sync(&hctx->run_work);
+ if (sync)
+ cancel_delayed_work_sync(&hctx->run_work);
+ else
+ cancel_delayed_work(&hctx->run_work);
+
set_bit(BLK_MQ_S_STOPPED, &hctx->state);
}
+
+void blk_mq_stop_hw_queue(struct blk_mq_hw_ctx *hctx)
+{
+ __blk_mq_stop_hw_queue(hctx, false);
+}
EXPORT_SYMBOL(blk_mq_stop_hw_queue);
-void blk_mq_stop_hw_queues(struct request_queue *q)
+void __blk_mq_stop_hw_queues(struct request_queue *q, bool sync)
{
struct blk_mq_hw_ctx *hctx;
int i;
queue_for_each_hw_ctx(q, hctx, i)
- blk_mq_stop_hw_queue(hctx);
+ __blk_mq_stop_hw_queue(hctx, sync);
+}
+
+void blk_mq_stop_hw_queues(struct request_queue *q)
+{
+ __blk_mq_stop_hw_queues(q, false);
}
EXPORT_SYMBOL(blk_mq_stop_hw_queues);
if (!rq)
continue;
- set->ops->exit_request(set->driver_data, rq,
- hctx_idx, i);
+ set->ops->exit_request(set, rq, hctx_idx);
tags->static_rqs[i] = NULL;
}
}
tags->static_rqs[i] = rq;
if (set->ops->init_request) {
- if (set->ops->init_request(set->driver_data,
- rq, hctx_idx, i,
+ if (set->ops->init_request(set, rq, hctx_idx,
node)) {
tags->static_rqs[i] = NULL;
goto fail;
struct blk_mq_tag_set *set,
struct blk_mq_hw_ctx *hctx, unsigned int hctx_idx)
{
- unsigned flush_start_tag = set->queue_depth;
+ blk_mq_debugfs_unregister_hctx(hctx);
blk_mq_tag_idle(hctx);
if (set->ops->exit_request)
- set->ops->exit_request(set->driver_data,
- hctx->fq->flush_rq, hctx_idx,
- flush_start_tag + hctx_idx);
+ set->ops->exit_request(set, hctx->fq->flush_rq, hctx_idx);
blk_mq_sched_exit_hctx(q, hctx, hctx_idx);
struct blk_mq_hw_ctx *hctx, unsigned hctx_idx)
{
int node;
- unsigned flush_start_tag = set->queue_depth;
node = hctx->numa_node;
if (node == NUMA_NO_NODE)
goto sched_exit_hctx;
if (set->ops->init_request &&
- set->ops->init_request(set->driver_data,
- hctx->fq->flush_rq, hctx_idx,
- flush_start_tag + hctx_idx, node))
+ set->ops->init_request(set, hctx->fq->flush_rq, hctx_idx,
+ node))
goto free_fq;
if (hctx->flags & BLK_MQ_F_BLOCKING)
init_srcu_struct(&hctx->queue_rq_srcu);
+ blk_mq_debugfs_register_hctx(q, hctx);
+
return 0;
free_fq:
blk_mq_init_cpu_queues(q, set->nr_hw_queues);
- get_online_cpus();
mutex_lock(&all_q_mutex);
+ get_online_cpus();
list_add_tail(&q->all_q_node, &all_q_list);
blk_mq_add_queue_tag_set(set, q);
blk_mq_map_swqueue(q, cpu_online_mask);
- mutex_unlock(&all_q_mutex);
put_online_cpus();
+ mutex_unlock(&all_q_mutex);
if (!(set->flags & BLK_MQ_F_NO_SCHED)) {
int ret;
{
WARN_ON_ONCE(!atomic_read(&q->mq_freeze_depth));
+ blk_mq_debugfs_unregister_hctxs(q);
blk_mq_sysfs_unregister(q);
/*
blk_mq_map_swqueue(q, online_mask);
blk_mq_sysfs_register(q);
+ blk_mq_debugfs_register_hctxs(q);
}
/*
return -EINVAL;
blk_mq_freeze_queue(q);
- blk_mq_quiesce_queue(q);
ret = 0;
queue_for_each_hw_ctx(q, hctx, i) {
q->nr_requests = nr;
blk_mq_unfreeze_queue(q);
- blk_mq_start_stopped_hw_queues(q, true);
return ret;
}
extern void blk_mq_sysfs_unregister(struct request_queue *q);
extern void blk_mq_hctx_kobj_init(struct blk_mq_hw_ctx *hctx);
-/*
- * debugfs helpers
- */
-#ifdef CONFIG_BLK_DEBUG_FS
-int blk_mq_debugfs_register(struct request_queue *q);
-void blk_mq_debugfs_unregister(struct request_queue *q);
-int blk_mq_debugfs_register_mq(struct request_queue *q);
-void blk_mq_debugfs_unregister_mq(struct request_queue *q);
-#else
-static inline int blk_mq_debugfs_register(struct request_queue *q)
-{
- return 0;
-}
-
-static inline void blk_mq_debugfs_unregister(struct request_queue *q)
-{
-}
-
-static inline int blk_mq_debugfs_register_mq(struct request_queue *q)
-{
- return 0;
-}
-
-static inline void blk_mq_debugfs_unregister_mq(struct request_queue *q)
-{
-}
-#endif
-
extern void blk_mq_rq_timed_out(struct request *req, bool reserved);
void blk_mq_release(struct request_queue *q);
#include "blk.h"
#include "blk-mq.h"
+#include "blk-mq-debugfs.h"
#include "blk-wbt.h"
struct queue_sysfs_entry {
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);
int ret;
blk_mq_freeze_queue(q);
- blk_mq_quiesce_queue(q);
if (q->elevator) {
if (q->elevator->registered)
out:
blk_mq_unfreeze_queue(q);
- blk_mq_start_stopped_hw_queues(q, true);
return ret;
-
}
/*
return elevator_switch(q, e);
}
-int elevator_change(struct request_queue *q, const char *name)
-{
- int ret;
-
- /* Protect q->elevator from elevator_init() */
- mutex_lock(&q->sysfs_lock);
- ret = __elevator_change(q, name);
- mutex_unlock(&q->sysfs_lock);
-
- return ret;
-}
-EXPORT_SYMBOL(elevator_change);
-
static inline bool elv_support_iosched(struct request_queue *q)
{
if (q->mq_ops && q->tag_set && (q->tag_set->flags &
#include "blk.h"
#include "blk-mq.h"
+#include "blk-mq-debugfs.h"
#include "blk-mq-sched.h"
#include "blk-mq-tag.h"
#include "blk-stat.h"
};
#undef KYBER_LAT_ATTR
+#ifdef CONFIG_BLK_DEBUG_FS
+#define KYBER_DEBUGFS_DOMAIN_ATTRS(domain, name) \
+static int kyber_##name##_tokens_show(void *data, struct seq_file *m) \
+{ \
+ struct request_queue *q = data; \
+ struct kyber_queue_data *kqd = q->elevator->elevator_data; \
+ \
+ sbitmap_queue_show(&kqd->domain_tokens[domain], m); \
+ return 0; \
+} \
+ \
+static void *kyber_##name##_rqs_start(struct seq_file *m, loff_t *pos) \
+ __acquires(&khd->lock) \
+{ \
+ struct blk_mq_hw_ctx *hctx = m->private; \
+ struct kyber_hctx_data *khd = hctx->sched_data; \
+ \
+ spin_lock(&khd->lock); \
+ return seq_list_start(&khd->rqs[domain], *pos); \
+} \
+ \
+static void *kyber_##name##_rqs_next(struct seq_file *m, void *v, \
+ loff_t *pos) \
+{ \
+ struct blk_mq_hw_ctx *hctx = m->private; \
+ struct kyber_hctx_data *khd = hctx->sched_data; \
+ \
+ return seq_list_next(v, &khd->rqs[domain], pos); \
+} \
+ \
+static void kyber_##name##_rqs_stop(struct seq_file *m, void *v) \
+ __releases(&khd->lock) \
+{ \
+ struct blk_mq_hw_ctx *hctx = m->private; \
+ struct kyber_hctx_data *khd = hctx->sched_data; \
+ \
+ spin_unlock(&khd->lock); \
+} \
+ \
+static const struct seq_operations kyber_##name##_rqs_seq_ops = { \
+ .start = kyber_##name##_rqs_start, \
+ .next = kyber_##name##_rqs_next, \
+ .stop = kyber_##name##_rqs_stop, \
+ .show = blk_mq_debugfs_rq_show, \
+}; \
+ \
+static int kyber_##name##_waiting_show(void *data, struct seq_file *m) \
+{ \
+ struct blk_mq_hw_ctx *hctx = data; \
+ struct kyber_hctx_data *khd = hctx->sched_data; \
+ wait_queue_t *wait = &khd->domain_wait[domain]; \
+ \
+ seq_printf(m, "%d\n", !list_empty_careful(&wait->task_list)); \
+ return 0; \
+}
+KYBER_DEBUGFS_DOMAIN_ATTRS(KYBER_READ, read)
+KYBER_DEBUGFS_DOMAIN_ATTRS(KYBER_SYNC_WRITE, sync_write)
+KYBER_DEBUGFS_DOMAIN_ATTRS(KYBER_OTHER, other)
+#undef KYBER_DEBUGFS_DOMAIN_ATTRS
+
+static int kyber_async_depth_show(void *data, struct seq_file *m)
+{
+ struct request_queue *q = data;
+ struct kyber_queue_data *kqd = q->elevator->elevator_data;
+
+ seq_printf(m, "%u\n", kqd->async_depth);
+ return 0;
+}
+
+static int kyber_cur_domain_show(void *data, struct seq_file *m)
+{
+ struct blk_mq_hw_ctx *hctx = data;
+ struct kyber_hctx_data *khd = hctx->sched_data;
+
+ switch (khd->cur_domain) {
+ case KYBER_READ:
+ seq_puts(m, "READ\n");
+ break;
+ case KYBER_SYNC_WRITE:
+ seq_puts(m, "SYNC_WRITE\n");
+ break;
+ case KYBER_OTHER:
+ seq_puts(m, "OTHER\n");
+ break;
+ default:
+ seq_printf(m, "%u\n", khd->cur_domain);
+ break;
+ }
+ return 0;
+}
+
+static int kyber_batching_show(void *data, struct seq_file *m)
+{
+ struct blk_mq_hw_ctx *hctx = data;
+ struct kyber_hctx_data *khd = hctx->sched_data;
+
+ seq_printf(m, "%u\n", khd->batching);
+ return 0;
+}
+
+#define KYBER_QUEUE_DOMAIN_ATTRS(name) \
+ {#name "_tokens", 0400, kyber_##name##_tokens_show}
+static const struct blk_mq_debugfs_attr kyber_queue_debugfs_attrs[] = {
+ KYBER_QUEUE_DOMAIN_ATTRS(read),
+ KYBER_QUEUE_DOMAIN_ATTRS(sync_write),
+ KYBER_QUEUE_DOMAIN_ATTRS(other),
+ {"async_depth", 0400, kyber_async_depth_show},
+ {},
+};
+#undef KYBER_QUEUE_DOMAIN_ATTRS
+
+#define KYBER_HCTX_DOMAIN_ATTRS(name) \
+ {#name "_rqs", 0400, .seq_ops = &kyber_##name##_rqs_seq_ops}, \
+ {#name "_waiting", 0400, kyber_##name##_waiting_show}
+static const struct blk_mq_debugfs_attr kyber_hctx_debugfs_attrs[] = {
+ KYBER_HCTX_DOMAIN_ATTRS(read),
+ KYBER_HCTX_DOMAIN_ATTRS(sync_write),
+ KYBER_HCTX_DOMAIN_ATTRS(other),
+ {"cur_domain", 0400, kyber_cur_domain_show},
+ {"batching", 0400, kyber_batching_show},
+ {},
+};
+#undef KYBER_HCTX_DOMAIN_ATTRS
+#endif
+
static struct elevator_type kyber_sched = {
.ops.mq = {
.init_sched = kyber_init_sched,
.has_work = kyber_has_work,
},
.uses_mq = true,
+#ifdef CONFIG_BLK_DEBUG_FS
+ .queue_debugfs_attrs = kyber_queue_debugfs_attrs,
+ .hctx_debugfs_attrs = kyber_hctx_debugfs_attrs,
+#endif
.elevator_attrs = kyber_sched_attrs,
.elevator_name = "kyber",
.elevator_owner = THIS_MODULE,
#include "blk.h"
#include "blk-mq.h"
+#include "blk-mq-debugfs.h"
#include "blk-mq-tag.h"
#include "blk-mq-sched.h"
__ATTR_NULL
};
+#ifdef CONFIG_BLK_DEBUG_FS
+#define DEADLINE_DEBUGFS_DDIR_ATTRS(ddir, name) \
+static void *deadline_##name##_fifo_start(struct seq_file *m, \
+ loff_t *pos) \
+ __acquires(&dd->lock) \
+{ \
+ struct request_queue *q = m->private; \
+ struct deadline_data *dd = q->elevator->elevator_data; \
+ \
+ spin_lock(&dd->lock); \
+ return seq_list_start(&dd->fifo_list[ddir], *pos); \
+} \
+ \
+static void *deadline_##name##_fifo_next(struct seq_file *m, void *v, \
+ loff_t *pos) \
+{ \
+ struct request_queue *q = m->private; \
+ struct deadline_data *dd = q->elevator->elevator_data; \
+ \
+ return seq_list_next(v, &dd->fifo_list[ddir], pos); \
+} \
+ \
+static void deadline_##name##_fifo_stop(struct seq_file *m, void *v) \
+ __releases(&dd->lock) \
+{ \
+ struct request_queue *q = m->private; \
+ struct deadline_data *dd = q->elevator->elevator_data; \
+ \
+ spin_unlock(&dd->lock); \
+} \
+ \
+static const struct seq_operations deadline_##name##_fifo_seq_ops = { \
+ .start = deadline_##name##_fifo_start, \
+ .next = deadline_##name##_fifo_next, \
+ .stop = deadline_##name##_fifo_stop, \
+ .show = blk_mq_debugfs_rq_show, \
+}; \
+ \
+static int deadline_##name##_next_rq_show(void *data, \
+ struct seq_file *m) \
+{ \
+ struct request_queue *q = data; \
+ struct deadline_data *dd = q->elevator->elevator_data; \
+ struct request *rq = dd->next_rq[ddir]; \
+ \
+ if (rq) \
+ __blk_mq_debugfs_rq_show(m, rq); \
+ return 0; \
+}
+DEADLINE_DEBUGFS_DDIR_ATTRS(READ, read)
+DEADLINE_DEBUGFS_DDIR_ATTRS(WRITE, write)
+#undef DEADLINE_DEBUGFS_DDIR_ATTRS
+
+static int deadline_batching_show(void *data, struct seq_file *m)
+{
+ struct request_queue *q = data;
+ struct deadline_data *dd = q->elevator->elevator_data;
+
+ seq_printf(m, "%u\n", dd->batching);
+ return 0;
+}
+
+static int deadline_starved_show(void *data, struct seq_file *m)
+{
+ struct request_queue *q = data;
+ struct deadline_data *dd = q->elevator->elevator_data;
+
+ seq_printf(m, "%u\n", dd->starved);
+ return 0;
+}
+
+static void *deadline_dispatch_start(struct seq_file *m, loff_t *pos)
+ __acquires(&dd->lock)
+{
+ struct request_queue *q = m->private;
+ struct deadline_data *dd = q->elevator->elevator_data;
+
+ spin_lock(&dd->lock);
+ return seq_list_start(&dd->dispatch, *pos);
+}
+
+static void *deadline_dispatch_next(struct seq_file *m, void *v, loff_t *pos)
+{
+ struct request_queue *q = m->private;
+ struct deadline_data *dd = q->elevator->elevator_data;
+
+ return seq_list_next(v, &dd->dispatch, pos);
+}
+
+static void deadline_dispatch_stop(struct seq_file *m, void *v)
+ __releases(&dd->lock)
+{
+ struct request_queue *q = m->private;
+ struct deadline_data *dd = q->elevator->elevator_data;
+
+ spin_unlock(&dd->lock);
+}
+
+static const struct seq_operations deadline_dispatch_seq_ops = {
+ .start = deadline_dispatch_start,
+ .next = deadline_dispatch_next,
+ .stop = deadline_dispatch_stop,
+ .show = blk_mq_debugfs_rq_show,
+};
+
+#define DEADLINE_QUEUE_DDIR_ATTRS(name) \
+ {#name "_fifo_list", 0400, .seq_ops = &deadline_##name##_fifo_seq_ops}, \
+ {#name "_next_rq", 0400, deadline_##name##_next_rq_show}
+static const struct blk_mq_debugfs_attr deadline_queue_debugfs_attrs[] = {
+ DEADLINE_QUEUE_DDIR_ATTRS(read),
+ DEADLINE_QUEUE_DDIR_ATTRS(write),
+ {"batching", 0400, deadline_batching_show},
+ {"starved", 0400, deadline_starved_show},
+ {"dispatch", 0400, .seq_ops = &deadline_dispatch_seq_ops},
+ {},
+};
+#undef DEADLINE_QUEUE_DDIR_ATTRS
+#endif
+
static struct elevator_type mq_deadline = {
.ops.mq = {
.insert_requests = dd_insert_requests,
},
.uses_mq = true,
+#ifdef CONFIG_BLK_DEBUG_FS
+ .queue_debugfs_attrs = deadline_queue_debugfs_attrs,
+#endif
.elevator_attrs = deadline_attrs,
.elevator_name = "mq-deadline",
.elevator_owner = THIS_MODULE,
loop_handle_cmd(cmd);
}
-static int loop_init_request(void *data, struct request *rq,
- unsigned int hctx_idx, unsigned int request_idx,
- unsigned int numa_node)
+static int loop_init_request(struct blk_mq_tag_set *set, struct request *rq,
+ unsigned int hctx_idx, unsigned int numa_node)
{
struct loop_cmd *cmd = blk_mq_rq_to_pdu(rq);
if (mtip_check_surprise_removal(dd->pdev))
return NULL;
- rq = blk_mq_alloc_request(dd->queue, 0, BLK_MQ_REQ_RESERVED);
+ rq = blk_mq_alloc_request(dd->queue, REQ_OP_DRV_IN, BLK_MQ_REQ_RESERVED);
if (IS_ERR(rq))
return NULL;
return blk_mq_rq_to_pdu(rq);
}
-static void mtip_put_int_command(struct driver_data *dd, struct mtip_cmd *cmd)
-{
- blk_put_request(blk_mq_rq_from_pdu(cmd));
-}
-
-/*
- * Once we add support for one hctx per mtip group, this will change a bit
- */
-static struct request *mtip_rq_from_tag(struct driver_data *dd,
- unsigned int tag)
-{
- struct blk_mq_hw_ctx *hctx = dd->queue->queue_hw_ctx[0];
-
- return blk_mq_tag_to_rq(hctx->tags, tag);
-}
-
static struct mtip_cmd *mtip_cmd_from_tag(struct driver_data *dd,
unsigned int tag)
{
- struct request *rq = mtip_rq_from_tag(dd, tag);
-
- return blk_mq_rq_to_pdu(rq);
-}
-
-/*
- * IO completion function.
- *
- * This completion function is called by the driver ISR when a
- * command that was issued by the kernel completes. It first calls the
- * asynchronous completion function which normally calls back into the block
- * layer passing the asynchronous callback data, then unmaps the
- * scatter list associated with the completed command, and finally
- * clears the allocated bit associated with the completed command.
- *
- * @port Pointer to the port data structure.
- * @tag Tag of the command.
- * @data Pointer to driver_data.
- * @status Completion status.
- *
- * return value
- * None
- */
-static void mtip_async_complete(struct mtip_port *port,
- int tag, struct mtip_cmd *cmd, int status)
-{
- struct driver_data *dd = port->dd;
- struct request *rq;
-
- if (unlikely(!dd) || unlikely(!port))
- return;
-
- if (unlikely(status == PORT_IRQ_TF_ERR)) {
- dev_warn(&port->dd->pdev->dev,
- "Command tag %d failed due to TFE\n", tag);
- }
-
- rq = mtip_rq_from_tag(dd, tag);
+ struct blk_mq_hw_ctx *hctx = dd->queue->queue_hw_ctx[0];
- cmd->status = status;
- blk_mq_complete_request(rq);
+ return blk_mq_rq_to_pdu(blk_mq_tag_to_rq(hctx->tags, tag));
}
/*
"%d command(s) %s: tagmap [%s]", cnt, msg, tagmap);
}
-/*
- * Internal command completion callback function.
- *
- * This function is normally called by the driver ISR when an internal
- * command completed. This function signals the command completion by
- * calling complete().
- *
- * @port Pointer to the port data structure.
- * @tag Tag of the command that has completed.
- * @data Pointer to a completion structure.
- * @status Completion status.
- *
- * return value
- * None
- */
-static void mtip_completion(struct mtip_port *port,
- int tag, struct mtip_cmd *command, int status)
-{
- struct completion *waiting = command->comp_data;
- if (unlikely(status == PORT_IRQ_TF_ERR))
- dev_warn(&port->dd->pdev->dev,
- "Internal command %d completed with TFE\n", tag);
-
- command->comp_func = NULL;
- command->comp_data = NULL;
- complete(waiting);
-}
-
-static void mtip_null_completion(struct mtip_port *port,
- int tag, struct mtip_cmd *command, int status)
-{
-}
-
static int mtip_read_log_page(struct mtip_port *port, u8 page, u16 *buffer,
dma_addr_t buffer_dma, unsigned int sectors);
static int mtip_get_smart_attr(struct mtip_port *port, unsigned int id,
struct smart_attr *attrib);
+
+static void mtip_complete_command(struct mtip_cmd *cmd, int status)
+{
+ struct request *req = blk_mq_rq_from_pdu(cmd);
+
+ cmd->status = status;
+ blk_mq_complete_request(req);
+}
+
/*
* Handle an error.
*
if (test_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags)) {
cmd = mtip_cmd_from_tag(dd, MTIP_TAG_INTERNAL);
dbg_printk(MTIP_DRV_NAME " TFE for the internal command\n");
-
- if (cmd->comp_data && cmd->comp_func) {
- cmd->comp_func(port, MTIP_TAG_INTERNAL,
- cmd, PORT_IRQ_TF_ERR);
- }
+ mtip_complete_command(cmd, -EIO);
return;
}
continue;
cmd = mtip_cmd_from_tag(dd, tag);
- if (likely(cmd->comp_func)) {
- set_bit(tag, tagaccum);
- cmd_cnt++;
- cmd->comp_func(port, tag, cmd, 0);
- } else {
- dev_err(&port->dd->pdev->dev,
- "Missing completion func for tag %d",
- tag);
- if (mtip_check_surprise_removal(dd->pdev)) {
- /* don't proceed further */
- return;
- }
- }
+ mtip_complete_command(cmd, 0);
+ set_bit(tag, tagaccum);
+ cmd_cnt++;
}
}
tag,
fail_reason != NULL ?
fail_reason : "unknown");
- if (cmd->comp_func) {
- cmd->comp_func(port, tag,
- cmd, -ENODATA);
- }
+ mtip_complete_command(cmd, -ENODATA);
continue;
}
}
dev_warn(&port->dd->pdev->dev,
"retiring tag %d\n", tag);
- if (cmd->comp_func)
- cmd->comp_func(port, tag, cmd, PORT_IRQ_TF_ERR);
- else
- dev_warn(&port->dd->pdev->dev,
- "Bad completion for tag %d\n",
- tag);
+ mtip_complete_command(cmd, -EIO);
}
}
print_tags(dd, "reissued (TFE)", tagaccum, cmd_cnt);
continue;
command = mtip_cmd_from_tag(dd, tag);
- if (likely(command->comp_func))
- command->comp_func(port, tag, command, 0);
- else {
- dev_dbg(&dd->pdev->dev,
- "Null completion for tag %d",
- tag);
-
- if (mtip_check_surprise_removal(
- dd->pdev)) {
- return;
- }
- }
+ mtip_complete_command(command, 0);
}
completed >>= 1;
}
struct mtip_port *port = dd->port;
struct mtip_cmd *cmd = mtip_cmd_from_tag(dd, MTIP_TAG_INTERNAL);
- if (test_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags) &&
- (cmd != NULL) && !(readl(port->cmd_issue[MTIP_TAG_INTERNAL])
- & (1 << MTIP_TAG_INTERNAL))) {
- if (cmd->comp_func) {
- cmd->comp_func(port, MTIP_TAG_INTERNAL, cmd, 0);
- return;
- }
- }
+ if (test_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags) && cmd) {
+ int group = MTIP_TAG_INDEX(MTIP_TAG_INTERNAL);
+ int status = readl(port->cmd_issue[group]);
- return;
+ if (!(status & (1 << MTIP_TAG_BIT(MTIP_TAG_INTERNAL))))
+ mtip_complete_command(cmd, 0);
+ }
}
/*
*/
static inline void mtip_process_errors(struct driver_data *dd, u32 port_stat)
{
-
if (unlikely(port_stat & PORT_IRQ_CONNECT)) {
dev_warn(&dd->pdev->dev,
"Clearing PxSERR.DIAG.x\n");
static void mtip_issue_non_ncq_command(struct mtip_port *port, int tag)
{
- writel(1 << MTIP_TAG_BIT(tag),
- port->cmd_issue[MTIP_TAG_INDEX(tag)]);
+ writel(1 << MTIP_TAG_BIT(tag), port->cmd_issue[MTIP_TAG_INDEX(tag)]);
}
static bool mtip_pause_ncq(struct mtip_port *port,
return false;
}
+static bool mtip_commands_active(struct mtip_port *port)
+{
+ unsigned int active;
+ unsigned int n;
+
+ /*
+ * Ignore s_active bit 0 of array element 0.
+ * This bit will always be set
+ */
+ active = readl(port->s_active[0]) & 0xFFFFFFFE;
+ for (n = 1; n < port->dd->slot_groups; n++)
+ active |= readl(port->s_active[n]);
+
+ return active != 0;
+}
+
/*
* Wait for port to quiesce
*
* @port Pointer to port data structure
* @timeout Max duration to wait (ms)
- * @atomic gfp_t flag to indicate blockable context or not
*
* return value
* 0 Success
* -EBUSY Commands still active
*/
-static int mtip_quiesce_io(struct mtip_port *port, unsigned long timeout,
- gfp_t atomic)
+static int mtip_quiesce_io(struct mtip_port *port, unsigned long timeout)
{
unsigned long to;
- unsigned int n;
- unsigned int active = 1;
+ bool active = true;
blk_mq_stop_hw_queues(port->dd->queue);
to = jiffies + msecs_to_jiffies(timeout);
do {
if (test_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags) &&
- test_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags) &&
- atomic == GFP_KERNEL) {
+ test_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags)) {
msleep(20);
continue; /* svc thd is actively issuing commands */
}
- if (atomic == GFP_KERNEL)
- msleep(100);
- else {
- cpu_relax();
- udelay(100);
- }
+ msleep(100);
if (mtip_check_surprise_removal(port->dd->pdev))
goto err_fault;
- /*
- * Ignore s_active bit 0 of array element 0.
- * This bit will always be set
- */
- active = readl(port->s_active[0]) & 0xFFFFFFFE;
- for (n = 1; n < port->dd->slot_groups; n++)
- active |= readl(port->s_active[n]);
-
+ active = mtip_commands_active(port);
if (!active)
break;
} while (time_before(jiffies, to));
return -EFAULT;
}
+struct mtip_int_cmd {
+ int fis_len;
+ dma_addr_t buffer;
+ int buf_len;
+ u32 opts;
+};
+
/*
* Execute an internal command and wait for the completion.
*
dma_addr_t buffer,
int buf_len,
u32 opts,
- gfp_t atomic,
unsigned long timeout)
{
- struct mtip_cmd_sg *command_sg;
- DECLARE_COMPLETION_ONSTACK(wait);
struct mtip_cmd *int_cmd;
struct driver_data *dd = port->dd;
+ struct request *rq;
+ struct mtip_int_cmd icmd = {
+ .fis_len = fis_len,
+ .buffer = buffer,
+ .buf_len = buf_len,
+ .opts = opts
+ };
int rv = 0;
unsigned long start;
dbg_printk(MTIP_DRV_NAME "Unable to allocate tag for PIO cmd\n");
return -EFAULT;
}
+ rq = blk_mq_rq_from_pdu(int_cmd);
+ rq->special = &icmd;
set_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags);
clear_bit(MTIP_PF_DM_ACTIVE_BIT, &port->flags);
- if (atomic == GFP_KERNEL) {
- if (fis->command != ATA_CMD_STANDBYNOW1) {
- /* wait for io to complete if non atomic */
- if (mtip_quiesce_io(port,
- MTIP_QUIESCE_IO_TIMEOUT_MS, atomic) < 0) {
- dev_warn(&dd->pdev->dev,
- "Failed to quiesce IO\n");
- mtip_put_int_command(dd, int_cmd);
- clear_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags);
- wake_up_interruptible(&port->svc_wait);
- return -EBUSY;
- }
+ if (fis->command != ATA_CMD_STANDBYNOW1) {
+ /* wait for io to complete if non atomic */
+ if (mtip_quiesce_io(port, MTIP_QUIESCE_IO_TIMEOUT_MS) < 0) {
+ dev_warn(&dd->pdev->dev, "Failed to quiesce IO\n");
+ blk_mq_free_request(rq);
+ clear_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags);
+ wake_up_interruptible(&port->svc_wait);
+ return -EBUSY;
}
-
- /* Set the completion function and data for the command. */
- int_cmd->comp_data = &wait;
- int_cmd->comp_func = mtip_completion;
-
- } else {
- /* Clear completion - we're going to poll */
- int_cmd->comp_data = NULL;
- int_cmd->comp_func = mtip_null_completion;
}
/* Copy the command to the command table */
memcpy(int_cmd->command, fis, fis_len*4);
- /* Populate the SG list */
- int_cmd->command_header->opts =
- __force_bit2int cpu_to_le32(opts | fis_len);
- if (buf_len) {
- command_sg = int_cmd->command + AHCI_CMD_TBL_HDR_SZ;
-
- command_sg->info =
- __force_bit2int cpu_to_le32((buf_len-1) & 0x3FFFFF);
- command_sg->dba =
- __force_bit2int cpu_to_le32(buffer & 0xFFFFFFFF);
- command_sg->dba_upper =
- __force_bit2int cpu_to_le32((buffer >> 16) >> 16);
-
- int_cmd->command_header->opts |=
- __force_bit2int cpu_to_le32((1 << 16));
- }
-
- /* Populate the command header */
- int_cmd->command_header->byte_count = 0;
-
start = jiffies;
+ rq->timeout = timeout;
- /* Issue the command to the hardware */
- mtip_issue_non_ncq_command(port, MTIP_TAG_INTERNAL);
-
- if (atomic == GFP_KERNEL) {
- /* Wait for the command to complete or timeout. */
- if ((rv = wait_for_completion_interruptible_timeout(
- &wait,
- msecs_to_jiffies(timeout))) <= 0) {
-
- if (rv == -ERESTARTSYS) { /* interrupted */
- dev_err(&dd->pdev->dev,
- "Internal command [%02X] was interrupted after %u ms\n",
- fis->command,
- jiffies_to_msecs(jiffies - start));
- rv = -EINTR;
- goto exec_ic_exit;
- } else if (rv == 0) /* timeout */
- dev_err(&dd->pdev->dev,
- "Internal command did not complete [%02X] within timeout of %lu ms\n",
- fis->command, timeout);
- else
- dev_err(&dd->pdev->dev,
- "Internal command [%02X] wait returned code [%d] after %lu ms - unhandled\n",
- fis->command, rv, timeout);
-
- if (mtip_check_surprise_removal(dd->pdev) ||
- test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
- &dd->dd_flag)) {
- dev_err(&dd->pdev->dev,
- "Internal command [%02X] wait returned due to SR\n",
- fis->command);
- rv = -ENXIO;
- goto exec_ic_exit;
- }
- mtip_device_reset(dd); /* recover from timeout issue */
- rv = -EAGAIN;
+ /* insert request and run queue */
+ blk_execute_rq(rq->q, NULL, rq, true);
+
+ rv = int_cmd->status;
+ if (rv < 0) {
+ if (rv == -ERESTARTSYS) { /* interrupted */
+ dev_err(&dd->pdev->dev,
+ "Internal command [%02X] was interrupted after %u ms\n",
+ fis->command,
+ jiffies_to_msecs(jiffies - start));
+ rv = -EINTR;
goto exec_ic_exit;
- }
- } else {
- u32 hba_stat, port_stat;
-
- /* Spin for <timeout> checking if command still outstanding */
- timeout = jiffies + msecs_to_jiffies(timeout);
- while ((readl(port->cmd_issue[MTIP_TAG_INTERNAL])
- & (1 << MTIP_TAG_INTERNAL))
- && time_before(jiffies, timeout)) {
- if (mtip_check_surprise_removal(dd->pdev)) {
- rv = -ENXIO;
- goto exec_ic_exit;
- }
- if ((fis->command != ATA_CMD_STANDBYNOW1) &&
- test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
- &dd->dd_flag)) {
- rv = -ENXIO;
- goto exec_ic_exit;
- }
- port_stat = readl(port->mmio + PORT_IRQ_STAT);
- if (!port_stat)
- continue;
+ } else if (rv == 0) /* timeout */
+ dev_err(&dd->pdev->dev,
+ "Internal command did not complete [%02X] within timeout of %lu ms\n",
+ fis->command, timeout);
+ else
+ dev_err(&dd->pdev->dev,
+ "Internal command [%02X] wait returned code [%d] after %lu ms - unhandled\n",
+ fis->command, rv, timeout);
- if (port_stat & PORT_IRQ_ERR) {
- dev_err(&dd->pdev->dev,
- "Internal command [%02X] failed\n",
- fis->command);
- mtip_device_reset(dd);
- rv = -EIO;
- goto exec_ic_exit;
- } else {
- writel(port_stat, port->mmio + PORT_IRQ_STAT);
- hba_stat = readl(dd->mmio + HOST_IRQ_STAT);
- if (hba_stat)
- writel(hba_stat,
- dd->mmio + HOST_IRQ_STAT);
- }
- break;
+ if (mtip_check_surprise_removal(dd->pdev) ||
+ test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
+ &dd->dd_flag)) {
+ dev_err(&dd->pdev->dev,
+ "Internal command [%02X] wait returned due to SR\n",
+ fis->command);
+ rv = -ENXIO;
+ goto exec_ic_exit;
}
+ mtip_device_reset(dd); /* recover from timeout issue */
+ rv = -EAGAIN;
+ goto exec_ic_exit;
}
- if (readl(port->cmd_issue[MTIP_TAG_INTERNAL])
- & (1 << MTIP_TAG_INTERNAL)) {
+ if (readl(port->cmd_issue[MTIP_TAG_INDEX(MTIP_TAG_INTERNAL)])
+ & (1 << MTIP_TAG_BIT(MTIP_TAG_INTERNAL))) {
rv = -ENXIO;
if (!test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag)) {
mtip_device_reset(dd);
}
exec_ic_exit:
/* Clear the allocated and active bits for the internal command. */
- mtip_put_int_command(dd, int_cmd);
+ blk_mq_free_request(rq);
clear_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags);
if (rv >= 0 && mtip_pause_ncq(port, fis)) {
/* NCQ paused */
port->identify_dma,
sizeof(u16) * ATA_ID_WORDS,
0,
- GFP_KERNEL,
MTIP_INT_CMD_TIMEOUT_MS)
< 0) {
rv = -1;
0,
0,
0,
- GFP_ATOMIC,
timeout);
dbg_printk(MTIP_DRV_NAME "Time taken to complete standby cmd: %d ms\n",
jiffies_to_msecs(jiffies - start));
buffer_dma,
sectors * ATA_SECT_SIZE,
0,
- GFP_ATOMIC,
MTIP_INT_CMD_TIMEOUT_MS);
}
buffer_dma,
ATA_SECT_SIZE,
0,
- GFP_ATOMIC,
15000);
}
dma_addr,
ATA_SECT_SIZE,
0,
- GFP_KERNEL,
MTIP_TRIM_TIMEOUT_MS) < 0)
rv = -EIO;
0,
0,
0,
- GFP_KERNEL,
to) < 0) {
return -1;
}
(xfer_sz ? dma_addr : 0),
(xfer_sz ? ATA_SECT_SIZE * xfer_sz : 0),
0,
- GFP_KERNEL,
to)
< 0) {
rv = -EFAULT;
dma_buffer,
transfer_size,
0,
- GFP_KERNEL,
timeout) < 0) {
err = -EIO;
goto abort;
(nents << 16) | 5 | AHCI_CMD_PREFETCH);
command->command_header->byte_count = 0;
- /*
- * Set the completion function and data for the command
- * within this layer.
- */
- command->comp_data = dd;
- command->comp_func = mtip_async_complete;
command->direction = dma_dir;
/*
return false;
}
+static int mtip_issue_reserved_cmd(struct blk_mq_hw_ctx *hctx,
+ struct request *rq)
+{
+ struct driver_data *dd = hctx->queue->queuedata;
+ struct mtip_int_cmd *icmd = rq->special;
+ struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq);
+ struct mtip_cmd_sg *command_sg;
+
+ if (mtip_commands_active(dd->port))
+ return BLK_MQ_RQ_QUEUE_BUSY;
+
+ /* Populate the SG list */
+ cmd->command_header->opts =
+ __force_bit2int cpu_to_le32(icmd->opts | icmd->fis_len);
+ if (icmd->buf_len) {
+ command_sg = cmd->command + AHCI_CMD_TBL_HDR_SZ;
+
+ command_sg->info =
+ __force_bit2int cpu_to_le32((icmd->buf_len-1) & 0x3FFFFF);
+ command_sg->dba =
+ __force_bit2int cpu_to_le32(icmd->buffer & 0xFFFFFFFF);
+ command_sg->dba_upper =
+ __force_bit2int cpu_to_le32((icmd->buffer >> 16) >> 16);
+
+ cmd->command_header->opts |=
+ __force_bit2int cpu_to_le32((1 << 16));
+ }
+
+ /* Populate the command header */
+ cmd->command_header->byte_count = 0;
+
+ blk_mq_start_request(rq);
+ mtip_issue_non_ncq_command(dd->port, rq->tag);
+ return BLK_MQ_RQ_QUEUE_OK;
+}
+
static int mtip_queue_rq(struct blk_mq_hw_ctx *hctx,
const struct blk_mq_queue_data *bd)
{
mtip_init_cmd_header(rq);
+ if (blk_rq_is_passthrough(rq))
+ return mtip_issue_reserved_cmd(hctx, rq);
+
if (unlikely(mtip_check_unal_depth(hctx, rq)))
return BLK_MQ_RQ_QUEUE_BUSY;
return BLK_MQ_RQ_QUEUE_ERROR;
}
-static void mtip_free_cmd(void *data, struct request *rq,
- unsigned int hctx_idx, unsigned int request_idx)
+static void mtip_free_cmd(struct blk_mq_tag_set *set, struct request *rq,
+ unsigned int hctx_idx)
{
- struct driver_data *dd = data;
+ struct driver_data *dd = set->driver_data;
struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq);
if (!cmd->command)
cmd->command, cmd->command_dma);
}
-static int mtip_init_cmd(void *data, struct request *rq, unsigned int hctx_idx,
- unsigned int request_idx, unsigned int numa_node)
+static int mtip_init_cmd(struct blk_mq_tag_set *set, struct request *rq,
+ unsigned int hctx_idx, unsigned int numa_node)
{
- struct driver_data *dd = data;
+ struct driver_data *dd = set->driver_data;
struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq);
- /*
- * For flush requests, request_idx starts at the end of the
- * tag space. Since we don't support FLUSH/FUA, simply return
- * 0 as there's nothing to be done.
- */
- if (request_idx >= MTIP_MAX_COMMAND_SLOTS)
- return 0;
-
cmd->command = dmam_alloc_coherent(&dd->pdev->dev, CMD_DMA_ALLOC_SZ,
&cmd->command_dma, GFP_KERNEL);
if (!cmd->command)
{
struct driver_data *dd = req->q->queuedata;
- if (reserved)
- goto exit_handler;
+ if (reserved) {
+ struct mtip_cmd *cmd = blk_mq_rq_to_pdu(req);
+
+ cmd->status = -ETIME;
+ return BLK_EH_HANDLED;
+ }
if (test_bit(req->tag, dd->port->cmds_to_issue))
goto exit_handler;
dd->tags.reserved_tags = 1;
dd->tags.cmd_size = sizeof(struct mtip_cmd);
dd->tags.numa_node = dd->numa_node;
- dd->tags.flags = BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_NO_SCHED;
+ dd->tags.flags = BLK_MQ_F_SHOULD_MERGE;
dd->tags.driver_data = dd;
dd->tags.timeout = MTIP_NCQ_CMD_TIMEOUT_MS;
static void mtip_no_dev_cleanup(struct request *rq, void *data, bool reserv)
{
- struct driver_data *dd = (struct driver_data *)data;
- struct mtip_cmd *cmd;
-
- if (likely(!reserv)) {
- cmd = blk_mq_rq_to_pdu(rq);
- cmd->status = -ENODEV;
- blk_mq_complete_request(rq);
- } else if (test_bit(MTIP_PF_IC_ACTIVE_BIT, &dd->port->flags)) {
+ struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq);
- cmd = mtip_cmd_from_tag(dd, MTIP_TAG_INTERNAL);
- if (cmd->comp_func)
- cmd->comp_func(dd->port, MTIP_TAG_INTERNAL,
- cmd, -ENODEV);
- }
+ cmd->status = -ENODEV;
+ blk_mq_complete_request(rq);
}
/*
* Explicitly wait here for IOs to quiesce,
* as mtip_standby_drive usually won't wait for IOs.
*/
- if (!mtip_quiesce_io(dd->port, MTIP_QUIESCE_IO_TIMEOUT_MS,
- GFP_KERNEL))
+ if (!mtip_quiesce_io(dd->port, MTIP_QUIESCE_IO_TIMEOUT_MS))
mtip_standby_drive(dd);
}
else
dma_addr_t command_dma; /* corresponding physical address */
- void *comp_data; /* data passed to completion function comp_func() */
- /*
- * Completion function called by the ISR upon completion of
- * a command.
- */
- void (*comp_func)(struct mtip_port *port,
- int tag,
- struct mtip_cmd *cmd,
- int status);
-
int scatter_ents; /* Number of scatter list entries used */
int unaligned; /* command is unaligned on 4k boundary */
#endif
-static int nbd_init_request(void *data, struct request *rq,
- unsigned int hctx_idx, unsigned int request_idx,
- unsigned int numa_node)
+static int nbd_init_request(struct blk_mq_tag_set *set, struct request *rq,
+ unsigned int hctx_idx, unsigned int numa_node)
{
struct nbd_cmd *cmd = blk_mq_rq_to_pdu(rq);
- cmd->nbd = data;
+ cmd->nbd = set->driver_data;
return 0;
}
return ret;
}
-static int rbd_init_request(void *data, struct request *rq,
- unsigned int hctx_idx, unsigned int request_idx,
- unsigned int numa_node)
+static int rbd_init_request(struct blk_mq_tag_set *set, struct request *rq,
+ unsigned int hctx_idx, unsigned int numa_node)
{
struct work_struct *work = blk_mq_rq_to_pdu(rq);
__ATTR(cache_type, S_IRUGO|S_IWUSR,
virtblk_cache_type_show, virtblk_cache_type_store);
-static int virtblk_init_request(void *data, struct request *rq,
- unsigned int hctx_idx, unsigned int request_idx,
- unsigned int numa_node)
+static int virtblk_init_request(struct blk_mq_tag_set *set, struct request *rq,
+ unsigned int hctx_idx, unsigned int numa_node)
{
- struct virtio_blk *vblk = data;
+ struct virtio_blk *vblk = set->driver_data;
struct virtblk_req *vbr = blk_mq_rq_to_pdu(rq);
#ifdef CONFIG_VIRTIO_BLK_SCSI
return 0;
err:
- while (--i > lun_begin)
+ while (--i >= lun_begin)
clear_bit(i, dev->lun_map);
return -EBUSY;
return tgt_dev;
err_ch:
- while (--i > 0)
+ while (--i >= 0)
kfree(dev_map->chnls[i].lun_offs);
kfree(luns);
err_luns:
return 0;
}
-static int dm_mq_init_request(void *data, struct request *rq,
- unsigned int hctx_idx, unsigned int request_idx,
- unsigned int numa_node)
+static int dm_mq_init_request(struct blk_mq_tag_set *set, struct request *rq,
+ unsigned int hctx_idx, unsigned int numa_node)
{
- return __dm_rq_init_rq(data, rq);
+ return __dm_rq_init_rq(set->driver_data, rq);
}
static int dm_mq_queue_rq(struct blk_mq_hw_ctx *hctx,
}
-static int ubiblock_init_request(void *data, struct request *req,
- unsigned int hctx_idx,
- unsigned int request_idx,
- unsigned int numa_node)
+static int ubiblock_init_request(struct blk_mq_tag_set *set,
+ struct request *req, unsigned int hctx_idx,
+ unsigned int numa_node)
{
struct ubiblock_pdu *pdu = blk_mq_rq_to_pdu(req);
}
static void
-nvme_fc_exit_request(void *data, struct request *rq,
- unsigned int hctx_idx, unsigned int rq_idx)
+nvme_fc_exit_request(struct blk_mq_tag_set *set, struct request *rq,
+ unsigned int hctx_idx)
{
struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq);
- return __nvme_fc_exit_request(data, op);
+ return __nvme_fc_exit_request(set->driver_data, op);
}
static int
}
static int
-nvme_fc_init_request(void *data, struct request *rq,
- unsigned int hctx_idx, unsigned int rq_idx,
- unsigned int numa_node)
+nvme_fc_init_request(struct blk_mq_tag_set *set, struct request *rq,
+ unsigned int hctx_idx, unsigned int numa_node)
{
- struct nvme_fc_ctrl *ctrl = data;
+ struct nvme_fc_ctrl *ctrl = set->driver_data;
struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq);
struct nvme_fc_queue *queue = &ctrl->queues[hctx_idx+1];
}
static int
-nvme_fc_init_admin_request(void *data, struct request *rq,
- unsigned int hctx_idx, unsigned int rq_idx,
- unsigned int numa_node)
+nvme_fc_init_admin_request(struct blk_mq_tag_set *set, struct request *rq,
+ unsigned int hctx_idx, unsigned int numa_node)
{
- struct nvme_fc_ctrl *ctrl = data;
+ struct nvme_fc_ctrl *ctrl = set->driver_data;
struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq);
struct nvme_fc_queue *queue = &ctrl->queues[0];
if (!cmd)
return -ENOMEM;
+ nvme_nvm_rqtocmd(rq, rqd, ns, cmd);
+
rq = nvme_alloc_request(q, (struct nvme_command *)cmd, 0, NVME_QID_ANY);
if (IS_ERR(rq)) {
kfree(cmd);
rq->__data_len = 0;
}
- nvme_nvm_rqtocmd(rq, rqd, ns, cmd);
-
rq->end_io_data = rqd;
blk_execute_rq_nowait(q, NULL, rq, 0, nvme_nvm_end_io);
nvmeq->tags = NULL;
}
-static int nvme_admin_init_request(void *data, struct request *req,
- unsigned int hctx_idx, unsigned int rq_idx,
- unsigned int numa_node)
+static int nvme_admin_init_request(struct blk_mq_tag_set *set,
+ struct request *req, unsigned int hctx_idx,
+ unsigned int numa_node)
{
- struct nvme_dev *dev = data;
+ struct nvme_dev *dev = set->driver_data;
struct nvme_iod *iod = blk_mq_rq_to_pdu(req);
struct nvme_queue *nvmeq = dev->queues[0];
return 0;
}
-static int nvme_init_request(void *data, struct request *req,
- unsigned int hctx_idx, unsigned int rq_idx,
- unsigned int numa_node)
+static int nvme_init_request(struct blk_mq_tag_set *set, struct request *req,
+ unsigned int hctx_idx, unsigned int numa_node)
{
- struct nvme_dev *dev = data;
+ struct nvme_dev *dev = set->driver_data;
struct nvme_iod *iod = blk_mq_rq_to_pdu(req);
struct nvme_queue *nvmeq = dev->queues[hctx_idx + 1];
DMA_TO_DEVICE);
}
-static void nvme_rdma_exit_request(void *data, struct request *rq,
- unsigned int hctx_idx, unsigned int rq_idx)
+static void nvme_rdma_exit_request(struct blk_mq_tag_set *set,
+ struct request *rq, unsigned int hctx_idx)
{
- return __nvme_rdma_exit_request(data, rq, hctx_idx + 1);
+ return __nvme_rdma_exit_request(set->driver_data, rq, hctx_idx + 1);
}
-static void nvme_rdma_exit_admin_request(void *data, struct request *rq,
- unsigned int hctx_idx, unsigned int rq_idx)
+static void nvme_rdma_exit_admin_request(struct blk_mq_tag_set *set,
+ struct request *rq, unsigned int hctx_idx)
{
- return __nvme_rdma_exit_request(data, rq, 0);
+ return __nvme_rdma_exit_request(set->driver_data, rq, 0);
}
static int __nvme_rdma_init_request(struct nvme_rdma_ctrl *ctrl,
return -ENOMEM;
}
-static int nvme_rdma_init_request(void *data, struct request *rq,
- unsigned int hctx_idx, unsigned int rq_idx,
- unsigned int numa_node)
+static int nvme_rdma_init_request(struct blk_mq_tag_set *set,
+ struct request *rq, unsigned int hctx_idx,
+ unsigned int numa_node)
{
- return __nvme_rdma_init_request(data, rq, hctx_idx + 1);
+ return __nvme_rdma_init_request(set->driver_data, rq, hctx_idx + 1);
}
-static int nvme_rdma_init_admin_request(void *data, struct request *rq,
- unsigned int hctx_idx, unsigned int rq_idx,
- unsigned int numa_node)
+static int nvme_rdma_init_admin_request(struct blk_mq_tag_set *set,
+ struct request *rq, unsigned int hctx_idx,
+ unsigned int numa_node)
{
- return __nvme_rdma_init_request(data, rq, 0);
+ return __nvme_rdma_init_request(set->driver_data, rq, 0);
}
static int nvme_rdma_init_hctx(struct blk_mq_hw_ctx *hctx, void *data,
return 0;
}
-static int nvme_loop_init_request(void *data, struct request *req,
- unsigned int hctx_idx, unsigned int rq_idx,
- unsigned int numa_node)
+static int nvme_loop_init_request(struct blk_mq_tag_set *set,
+ struct request *req, unsigned int hctx_idx,
+ unsigned int numa_node)
{
- return nvme_loop_init_iod(data, blk_mq_rq_to_pdu(req), hctx_idx + 1);
+ return nvme_loop_init_iod(set->driver_data, blk_mq_rq_to_pdu(req),
+ hctx_idx + 1);
}
-static int nvme_loop_init_admin_request(void *data, struct request *req,
- unsigned int hctx_idx, unsigned int rq_idx,
- unsigned int numa_node)
+static int nvme_loop_init_admin_request(struct blk_mq_tag_set *set,
+ struct request *req, unsigned int hctx_idx,
+ unsigned int numa_node)
{
- return nvme_loop_init_iod(data, blk_mq_rq_to_pdu(req), 0);
+ return nvme_loop_init_iod(set->driver_data, blk_mq_rq_to_pdu(req), 0);
}
static int nvme_loop_init_hctx(struct blk_mq_hw_ctx *hctx, void *data,
return scsi_times_out(req);
}
-static int scsi_init_request(void *data, struct request *rq,
- unsigned int hctx_idx, unsigned int request_idx,
- unsigned int numa_node)
+static int scsi_init_request(struct blk_mq_tag_set *set, struct request *rq,
+ unsigned int hctx_idx, unsigned int numa_node)
{
- struct Scsi_Host *shost = data;
+ struct Scsi_Host *shost = set->driver_data;
struct scsi_cmnd *cmd = blk_mq_rq_to_pdu(rq);
cmd->sense_buffer =
return 0;
}
-static void scsi_exit_request(void *data, struct request *rq,
- unsigned int hctx_idx, unsigned int request_idx)
+static void scsi_exit_request(struct blk_mq_tag_set *set, struct request *rq,
+ unsigned int hctx_idx)
{
- struct Scsi_Host *shost = data;
+ struct Scsi_Host *shost = set->driver_data;
struct scsi_cmnd *cmd = blk_mq_rq_to_pdu(rq);
scsi_free_sense_buffer(shost, cmd->sense_buffer);
};
struct nfs_mount_info {
- int (*fill_super)(struct super_block *, struct nfs_mount_info *);
+ void (*fill_super)(struct super_block *, struct nfs_mount_info *);
int (*set_security)(struct super_block *, struct dentry *, struct nfs_mount_info *);
struct nfs_parsed_mount_data *parsed;
struct nfs_clone_mount *cloned;
struct dentry * nfs_xdev_mount_common(struct file_system_type *, int,
const char *, struct nfs_mount_info *);
void nfs_kill_super(struct super_block *);
-int nfs_fill_super(struct super_block *, struct nfs_mount_info *);
+void nfs_fill_super(struct super_block *, struct nfs_mount_info *);
extern struct rpc_stat nfs_rpcstat;
extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio);
/* super.c */
-int nfs_clone_super(struct super_block *, struct nfs_mount_info *);
+void nfs_clone_super(struct super_block *, struct nfs_mount_info *);
void nfs_umount_begin(struct super_block *);
int nfs_statfs(struct dentry *, struct kstatfs *);
int nfs_show_options(struct seq_file *, struct dentry *);
/*
* Finish setting up an NFS2/3 superblock
*/
-int nfs_fill_super(struct super_block *sb, struct nfs_mount_info *mount_info)
+void nfs_fill_super(struct super_block *sb, struct nfs_mount_info *mount_info)
{
struct nfs_parsed_mount_data *data = mount_info->parsed;
struct nfs_server *server = NFS_SB(sb);
- int ret;
sb->s_blocksize_bits = 0;
sb->s_blocksize = 0;
}
nfs_initialise_sb(sb);
-
- ret = super_setup_bdi_name(sb, "%u:%u", MAJOR(server->s_dev),
- MINOR(server->s_dev));
- if (ret)
- return ret;
- sb->s_bdi->ra_pages = server->rpages * NFS_MAX_READAHEAD;
- return 0;
-
}
EXPORT_SYMBOL_GPL(nfs_fill_super);
/*
* Finish setting up a cloned NFS2/3/4 superblock
*/
-int nfs_clone_super(struct super_block *sb, struct nfs_mount_info *mount_info)
+void nfs_clone_super(struct super_block *sb, struct nfs_mount_info *mount_info)
{
const struct super_block *old_sb = mount_info->cloned->sb;
struct nfs_server *server = NFS_SB(sb);
}
nfs_initialise_sb(sb);
-
- sb->s_bdi = bdi_get(old_sb->s_bdi);
-
- return 0;
}
static int nfs_compare_mount_options(const struct super_block *s, const struct nfs_server *b, int flags)
nfs_free_server(server);
server = NULL;
} else {
+ error = super_setup_bdi_name(s, "%u:%u", MAJOR(server->s_dev),
+ MINOR(server->s_dev));
+ if (error) {
+ mntroot = ERR_PTR(error);
+ goto error_splat_super;
+ }
+ s->s_bdi->ra_pages = server->rpages * NFS_MAX_READAHEAD;
server->super = s;
}
if (!s->s_root) {
/* initial superblock/root creation */
- error = mount_info->fill_super(s, mount_info);
- if (error)
- goto error_splat_super;
+ mount_info->fill_super(s, mount_info);
nfs_get_cache_cookie(s, mount_info->parsed, mount_info->cloned);
}
unsigned long poll_considered;
unsigned long poll_invoked;
unsigned long poll_success;
+
+#ifdef CONFIG_BLK_DEBUG_FS
+ struct dentry *debugfs_dir;
+ struct dentry *sched_debugfs_dir;
+#endif
};
struct blk_mq_tag_set {
typedef enum blk_eh_timer_return (timeout_fn)(struct request *, bool);
typedef int (init_hctx_fn)(struct blk_mq_hw_ctx *, void *, unsigned int);
typedef void (exit_hctx_fn)(struct blk_mq_hw_ctx *, unsigned int);
-typedef int (init_request_fn)(void *, struct request *, unsigned int,
+typedef int (init_request_fn)(struct blk_mq_tag_set *set, struct request *,
unsigned int, unsigned int);
-typedef void (exit_request_fn)(void *, struct request *, unsigned int,
+typedef void (exit_request_fn)(struct blk_mq_tag_set *set, struct request *,
unsigned int);
typedef int (reinit_request_fn)(void *, struct request *);
#ifdef CONFIG_BLK_DEBUG_FS
struct dentry *debugfs_dir;
- struct dentry *mq_debugfs_dir;
+ struct dentry *sched_debugfs_dir;
#endif
bool mq_sysfs_init_done;
struct io_cq;
struct elevator_type;
+#ifdef CONFIG_BLK_DEBUG_FS
+struct blk_mq_debugfs_attr;
+#endif
/*
* Return values from elevator merger
char elevator_name[ELV_NAME_MAX];
struct module *elevator_owner;
bool uses_mq;
+#ifdef CONFIG_BLK_DEBUG_FS
+ const struct blk_mq_debugfs_attr *queue_debugfs_attrs;
+ const struct blk_mq_debugfs_attr *hctx_debugfs_attrs;
+#endif
/* managed by elevator core */
char icq_cache_name[ELV_NAME_MAX + 5]; /* elvname + "_io_cq" */
extern int elevator_init(struct request_queue *, char *);
extern void elevator_exit(struct request_queue *, struct elevator_queue *);
-extern int elevator_change(struct request_queue *, const char *);
extern bool elv_bio_merge_ok(struct request *, struct bio *);
extern struct elevator_queue *elevator_alloc(struct request_queue *,
struct elevator_type *);
projects / platform / kernel / linux-exynos.git / commitdiff