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block/blk-mq-debugfs.c
24.5 KB
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// SPDX-License-Identifier: GPL-2.0 |
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/* * Copyright (C) 2017 Facebook |
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*/ #include <linux/kernel.h> #include <linux/blkdev.h> #include <linux/debugfs.h> #include <linux/blk-mq.h> |
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#include "blk.h" |
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#include "blk-mq.h" |
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#include "blk-mq-debugfs.h" |
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#include "blk-mq-tag.h" |
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#include "blk-rq-qos.h" |
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static void print_stat(struct seq_file *m, struct blk_rq_stat *stat) { if (stat->nr_samples) { |
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seq_printf(m, "samples=%d, mean=%llu, min=%llu, max=%llu", |
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stat->nr_samples, stat->mean, stat->min, stat->max); } else { seq_puts(m, "samples=0"); } } static int queue_poll_stat_show(void *data, struct seq_file *m) { struct request_queue *q = data; int bucket; |
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for (bucket = 0; bucket < (BLK_MQ_POLL_STATS_BKTS / 2); bucket++) { seq_printf(m, "read (%d Bytes): ", 1 << (9 + bucket)); print_stat(m, &q->poll_stat[2 * bucket]); |
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seq_puts(m, " "); |
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seq_printf(m, "write (%d Bytes): ", 1 << (9 + bucket)); print_stat(m, &q->poll_stat[2 * bucket + 1]); |
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seq_puts(m, " "); } return 0; } static void *queue_requeue_list_start(struct seq_file *m, loff_t *pos) __acquires(&q->requeue_lock) { struct request_queue *q = m->private; spin_lock_irq(&q->requeue_lock); return seq_list_start(&q->requeue_list, *pos); } static void *queue_requeue_list_next(struct seq_file *m, void *v, loff_t *pos) { struct request_queue *q = m->private; return seq_list_next(v, &q->requeue_list, pos); } static void queue_requeue_list_stop(struct seq_file *m, void *v) __releases(&q->requeue_lock) { struct request_queue *q = m->private; spin_unlock_irq(&q->requeue_lock); } static const struct seq_operations queue_requeue_list_seq_ops = { .start = queue_requeue_list_start, .next = queue_requeue_list_next, .stop = queue_requeue_list_stop, .show = blk_mq_debugfs_rq_show, }; |
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static int blk_flags_show(struct seq_file *m, const unsigned long flags, const char *const *flag_name, int flag_name_count) { bool sep = false; int i; for (i = 0; i < sizeof(flags) * BITS_PER_BYTE; i++) { if (!(flags & BIT(i))) continue; if (sep) |
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seq_puts(m, "|"); |
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sep = true; if (i < flag_name_count && flag_name[i]) seq_puts(m, flag_name[i]); else seq_printf(m, "%d", i); } |
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return 0; } |
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static int queue_pm_only_show(void *data, struct seq_file *m) { struct request_queue *q = data; seq_printf(m, "%d ", atomic_read(&q->pm_only)); return 0; } |
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#define QUEUE_FLAG_NAME(name) [QUEUE_FLAG_##name] = #name |
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static const char *const blk_queue_flag_name[] = { |
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QUEUE_FLAG_NAME(STOPPED), |
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QUEUE_FLAG_NAME(DYING), |
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QUEUE_FLAG_NAME(NOMERGES), QUEUE_FLAG_NAME(SAME_COMP), QUEUE_FLAG_NAME(FAIL_IO), |
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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), |
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QUEUE_FLAG_NAME(POLL), QUEUE_FLAG_NAME(WC), QUEUE_FLAG_NAME(FUA), |
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QUEUE_FLAG_NAME(DAX), QUEUE_FLAG_NAME(STATS), QUEUE_FLAG_NAME(POLL_STATS), QUEUE_FLAG_NAME(REGISTERED), |
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QUEUE_FLAG_NAME(SCSI_PASSTHROUGH), QUEUE_FLAG_NAME(QUIESCED), |
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QUEUE_FLAG_NAME(PCI_P2PDMA), QUEUE_FLAG_NAME(ZONE_RESETALL), QUEUE_FLAG_NAME(RQ_ALLOC_TIME), |
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}; |
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#undef QUEUE_FLAG_NAME |
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|
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static int queue_state_show(void *data, struct seq_file *m) |
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{ |
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struct request_queue *q = data; |
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blk_flags_show(m, q->queue_flags, blk_queue_flag_name, ARRAY_SIZE(blk_queue_flag_name)); |
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seq_puts(m, " "); |
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return 0; } |
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static ssize_t queue_state_write(void *data, const char __user *buf, size_t count, loff_t *ppos) |
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{ |
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struct request_queue *q = data; |
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char opbuf[16] = { }, *op; |
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|
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/* * 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; |
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if (count >= sizeof(opbuf)) { |
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pr_err("%s: operation too long ", __func__); goto inval; } |
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if (copy_from_user(opbuf, buf, count)) |
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return -EFAULT; |
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op = strstrip(opbuf); |
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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); |
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} else if (strcmp(op, "kick") == 0) { blk_mq_kick_requeue_list(q); |
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} else { |
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pr_err("%s: unsupported operation '%s' ", __func__, op); inval: |
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pr_err("%s: use 'run', 'start' or 'kick' ", __func__); |
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return -EINVAL; } |
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return count; |
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} |
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static int queue_write_hint_show(void *data, struct seq_file *m) { struct request_queue *q = data; int i; for (i = 0; i < BLK_MAX_WRITE_HINTS; i++) seq_printf(m, "hint%d: %llu ", i, q->write_hints[i]); return 0; } static ssize_t queue_write_hint_store(void *data, const char __user *buf, size_t count, loff_t *ppos) { struct request_queue *q = data; int i; for (i = 0; i < BLK_MAX_WRITE_HINTS; i++) q->write_hints[i] = 0; return count; } |
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static const struct blk_mq_debugfs_attr blk_mq_debugfs_queue_attrs[] = { { "poll_stat", 0400, queue_poll_stat_show }, { "requeue_list", 0400, .seq_ops = &queue_requeue_list_seq_ops }, |
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{ "pm_only", 0600, queue_pm_only_show, NULL }, |
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{ "state", 0600, queue_state_show, queue_state_write }, { "write_hints", 0600, queue_write_hint_show, queue_write_hint_store }, |
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{ "zone_wlock", 0400, queue_zone_wlock_show, NULL }, |
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{ }, }; |
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|
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#define HCTX_STATE_NAME(name) [BLK_MQ_S_##name] = #name |
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static const char *const hctx_state_name[] = { |
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HCTX_STATE_NAME(STOPPED), HCTX_STATE_NAME(TAG_ACTIVE), HCTX_STATE_NAME(SCHED_RESTART), |
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}; |
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#undef HCTX_STATE_NAME |
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static int hctx_state_show(void *data, struct seq_file *m) |
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{ |
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struct blk_mq_hw_ctx *hctx = data; |
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|
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blk_flags_show(m, hctx->state, hctx_state_name, ARRAY_SIZE(hctx_state_name)); |
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seq_puts(m, " "); |
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return 0; } |
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#define BLK_TAG_ALLOC_NAME(name) [BLK_TAG_ALLOC_##name] = #name |
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static const char *const alloc_policy_name[] = { |
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BLK_TAG_ALLOC_NAME(FIFO), BLK_TAG_ALLOC_NAME(RR), |
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}; |
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#undef BLK_TAG_ALLOC_NAME |
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|
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#define HCTX_FLAG_NAME(name) [ilog2(BLK_MQ_F_##name)] = #name |
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static const char *const hctx_flag_name[] = { |
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HCTX_FLAG_NAME(SHOULD_MERGE), HCTX_FLAG_NAME(TAG_SHARED), |
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HCTX_FLAG_NAME(BLOCKING), HCTX_FLAG_NAME(NO_SCHED), |
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}; |
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#undef HCTX_FLAG_NAME |
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|
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static int hctx_flags_show(void *data, struct seq_file *m) |
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{ |
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struct blk_mq_hw_ctx *hctx = data; |
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const int alloc_policy = BLK_MQ_FLAG_TO_ALLOC_POLICY(hctx->flags); |
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|
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seq_puts(m, "alloc_policy="); if (alloc_policy < ARRAY_SIZE(alloc_policy_name) && alloc_policy_name[alloc_policy]) seq_puts(m, alloc_policy_name[alloc_policy]); else seq_printf(m, "%d", alloc_policy); seq_puts(m, " "); blk_flags_show(m, hctx->flags ^ BLK_ALLOC_POLICY_TO_MQ_FLAG(alloc_policy), hctx_flag_name, ARRAY_SIZE(hctx_flag_name)); |
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seq_puts(m, " "); |
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return 0; } |
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#define CMD_FLAG_NAME(name) [__REQ_##name] = #name |
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static const char *const cmd_flag_name[] = { |
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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), |
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CMD_FLAG_NAME(NOWAIT), |
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CMD_FLAG_NAME(NOUNMAP), CMD_FLAG_NAME(HIPRI), |
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}; |
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#undef CMD_FLAG_NAME |
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|
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#define RQF_NAME(name) [ilog2((__force u32)RQF_##name)] = #name |
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static const char *const rqf_name[] = { |
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RQF_NAME(SORTED), |
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RQF_NAME(STARTED), |
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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), |
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RQF_NAME(ZONE_WRITE_LOCKED), |
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RQF_NAME(MQ_POLL_SLEPT), |
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}; |
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#undef RQF_NAME |
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|
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static const char *const blk_mq_rq_state_name_array[] = { [MQ_RQ_IDLE] = "idle", [MQ_RQ_IN_FLIGHT] = "in_flight", [MQ_RQ_COMPLETE] = "complete", }; static const char *blk_mq_rq_state_name(enum mq_rq_state rq_state) { |
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if (WARN_ON_ONCE((unsigned int)rq_state >= |
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ARRAY_SIZE(blk_mq_rq_state_name_array))) return "(?)"; return blk_mq_rq_state_name_array[rq_state]; } |
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int __blk_mq_debugfs_rq_show(struct seq_file *m, struct request *rq) |
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{ |
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const struct blk_mq_ops *const mq_ops = rq->q->mq_ops; |
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const unsigned int op = req_op(rq); |
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const char *op_str = blk_op_str(op); |
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|
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seq_printf(m, "%p {.op=", rq); |
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if (strcmp(op_str, "UNKNOWN") == 0) |
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seq_printf(m, "%u", op); |
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else |
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seq_printf(m, "%s", op_str); |
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seq_puts(m, ", .cmd_flags="); blk_flags_show(m, rq->cmd_flags & ~REQ_OP_MASK, cmd_flag_name, ARRAY_SIZE(cmd_flag_name)); seq_puts(m, ", .rq_flags="); blk_flags_show(m, (__force unsigned int)rq->rq_flags, rqf_name, ARRAY_SIZE(rqf_name)); |
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seq_printf(m, ", .state=%s", blk_mq_rq_state_name(blk_mq_rq_state(rq))); |
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seq_printf(m, ", .tag=%d, .internal_tag=%d", rq->tag, |
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rq->internal_tag); |
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if (mq_ops->show_rq) mq_ops->show_rq(m, rq); seq_puts(m, "} "); |
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return 0; } |
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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)); } |
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EXPORT_SYMBOL_GPL(blk_mq_debugfs_rq_show); |
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static void *hctx_dispatch_start(struct seq_file *m, loff_t *pos) |
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__acquires(&hctx->lock) |
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{ struct blk_mq_hw_ctx *hctx = m->private; spin_lock(&hctx->lock); return seq_list_start(&hctx->dispatch, *pos); } static void *hctx_dispatch_next(struct seq_file *m, void *v, loff_t *pos) { struct blk_mq_hw_ctx *hctx = m->private; return seq_list_next(v, &hctx->dispatch, pos); } static void hctx_dispatch_stop(struct seq_file *m, void *v) |
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__releases(&hctx->lock) |
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{ struct blk_mq_hw_ctx *hctx = m->private; spin_unlock(&hctx->lock); } static const struct seq_operations hctx_dispatch_seq_ops = { .start = hctx_dispatch_start, .next = hctx_dispatch_next, .stop = hctx_dispatch_stop, .show = blk_mq_debugfs_rq_show, }; |
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struct show_busy_params { struct seq_file *m; struct blk_mq_hw_ctx *hctx; }; /* * Note: the state of a request may change while this function is in progress, |
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* e.g. due to a concurrent blk_mq_finish_request() call. Returns true to * keep iterating requests. |
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*/ |
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static bool hctx_show_busy_rq(struct request *rq, void *data, bool reserved) |
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{ const struct show_busy_params *params = data; |
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if (rq->mq_hctx == params->hctx) |
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__blk_mq_debugfs_rq_show(params->m, list_entry_rq(&rq->queuelist)); |
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return true; |
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} static int hctx_busy_show(void *data, struct seq_file *m) { struct blk_mq_hw_ctx *hctx = data; struct show_busy_params params = { .m = m, .hctx = hctx }; blk_mq_tagset_busy_iter(hctx->queue->tag_set, hctx_show_busy_rq, ¶ms); return 0; } |
346fc1089 blk-mq: export hc... |
417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 |
static const char *const hctx_types[] = { [HCTX_TYPE_DEFAULT] = "default", [HCTX_TYPE_READ] = "read", [HCTX_TYPE_POLL] = "poll", }; static int hctx_type_show(void *data, struct seq_file *m) { struct blk_mq_hw_ctx *hctx = data; BUILD_BUG_ON(ARRAY_SIZE(hctx_types) != HCTX_MAX_TYPES); seq_printf(m, "%s ", hctx_types[hctx->type]); return 0; } |
f57de23ac blk-mq-debugfs: g... |
432 |
static int hctx_ctx_map_show(void *data, struct seq_file *m) |
0bfa5288a blk-mq: export so... |
433 |
{ |
f57de23ac blk-mq-debugfs: g... |
434 |
struct blk_mq_hw_ctx *hctx = data; |
0bfa5288a blk-mq: export so... |
435 436 437 438 |
sbitmap_bitmap_show(&hctx->ctx_map, m); return 0; } |
d96b37c0a blk-mq: move tags... |
439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 |
static void blk_mq_debugfs_tags_show(struct seq_file *m, struct blk_mq_tags *tags) { seq_printf(m, "nr_tags=%u ", tags->nr_tags); seq_printf(m, "nr_reserved_tags=%u ", tags->nr_reserved_tags); seq_printf(m, "active_queues=%d ", atomic_read(&tags->active_queues)); seq_puts(m, " bitmap_tags: "); sbitmap_queue_show(&tags->bitmap_tags, m); if (tags->nr_reserved_tags) { seq_puts(m, " breserved_tags: "); sbitmap_queue_show(&tags->breserved_tags, m); } } |
f57de23ac blk-mq-debugfs: g... |
462 |
static int hctx_tags_show(void *data, struct seq_file *m) |
d96b37c0a blk-mq: move tags... |
463 |
{ |
f57de23ac blk-mq-debugfs: g... |
464 |
struct blk_mq_hw_ctx *hctx = data; |
d96b37c0a blk-mq: move tags... |
465 |
struct request_queue *q = hctx->queue; |
8c0f14eab blk-mq-debug: Mak... |
466 |
int res; |
d96b37c0a blk-mq: move tags... |
467 |
|
8c0f14eab blk-mq-debug: Mak... |
468 469 470 |
res = mutex_lock_interruptible(&q->sysfs_lock); if (res) goto out; |
d96b37c0a blk-mq: move tags... |
471 472 473 |
if (hctx->tags) blk_mq_debugfs_tags_show(m, hctx->tags); mutex_unlock(&q->sysfs_lock); |
8c0f14eab blk-mq-debug: Mak... |
474 475 |
out: return res; |
d96b37c0a blk-mq: move tags... |
476 |
} |
f57de23ac blk-mq-debugfs: g... |
477 |
static int hctx_tags_bitmap_show(void *data, struct seq_file *m) |
d7e3621ad blk-mq: add tags ... |
478 |
{ |
f57de23ac blk-mq-debugfs: g... |
479 |
struct blk_mq_hw_ctx *hctx = data; |
d7e3621ad blk-mq: add tags ... |
480 |
struct request_queue *q = hctx->queue; |
8c0f14eab blk-mq-debug: Mak... |
481 |
int res; |
d7e3621ad blk-mq: add tags ... |
482 |
|
8c0f14eab blk-mq-debug: Mak... |
483 484 485 |
res = mutex_lock_interruptible(&q->sysfs_lock); if (res) goto out; |
d7e3621ad blk-mq: add tags ... |
486 487 488 |
if (hctx->tags) sbitmap_bitmap_show(&hctx->tags->bitmap_tags.sb, m); mutex_unlock(&q->sysfs_lock); |
8c0f14eab blk-mq-debug: Mak... |
489 490 491 |
out: return res; |
d7e3621ad blk-mq: add tags ... |
492 |
} |
f57de23ac blk-mq-debugfs: g... |
493 |
static int hctx_sched_tags_show(void *data, struct seq_file *m) |
d96b37c0a blk-mq: move tags... |
494 |
{ |
f57de23ac blk-mq-debugfs: g... |
495 |
struct blk_mq_hw_ctx *hctx = data; |
d96b37c0a blk-mq: move tags... |
496 |
struct request_queue *q = hctx->queue; |
8c0f14eab blk-mq-debug: Mak... |
497 |
int res; |
d96b37c0a blk-mq: move tags... |
498 |
|
8c0f14eab blk-mq-debug: Mak... |
499 500 501 |
res = mutex_lock_interruptible(&q->sysfs_lock); if (res) goto out; |
d96b37c0a blk-mq: move tags... |
502 503 504 |
if (hctx->sched_tags) blk_mq_debugfs_tags_show(m, hctx->sched_tags); mutex_unlock(&q->sysfs_lock); |
8c0f14eab blk-mq-debug: Mak... |
505 506 |
out: return res; |
d96b37c0a blk-mq: move tags... |
507 |
} |
f57de23ac blk-mq-debugfs: g... |
508 |
static int hctx_sched_tags_bitmap_show(void *data, struct seq_file *m) |
d7e3621ad blk-mq: add tags ... |
509 |
{ |
f57de23ac blk-mq-debugfs: g... |
510 |
struct blk_mq_hw_ctx *hctx = data; |
d7e3621ad blk-mq: add tags ... |
511 |
struct request_queue *q = hctx->queue; |
8c0f14eab blk-mq-debug: Mak... |
512 |
int res; |
d7e3621ad blk-mq: add tags ... |
513 |
|
8c0f14eab blk-mq-debug: Mak... |
514 515 516 |
res = mutex_lock_interruptible(&q->sysfs_lock); if (res) goto out; |
d7e3621ad blk-mq: add tags ... |
517 518 519 |
if (hctx->sched_tags) sbitmap_bitmap_show(&hctx->sched_tags->bitmap_tags.sb, m); mutex_unlock(&q->sysfs_lock); |
8c0f14eab blk-mq-debug: Mak... |
520 521 522 |
out: return res; |
d7e3621ad blk-mq: add tags ... |
523 |
} |
f57de23ac blk-mq-debugfs: g... |
524 |
static int hctx_io_poll_show(void *data, struct seq_file *m) |
be2154731 blk-mq: move hctx... |
525 |
{ |
f57de23ac blk-mq-debugfs: g... |
526 |
struct blk_mq_hw_ctx *hctx = data; |
be2154731 blk-mq: move hctx... |
527 528 529 530 531 532 533 534 535 |
seq_printf(m, "considered=%lu ", hctx->poll_considered); seq_printf(m, "invoked=%lu ", hctx->poll_invoked); seq_printf(m, "success=%lu ", hctx->poll_success); return 0; } |
f57de23ac blk-mq-debugfs: g... |
536 |
static ssize_t hctx_io_poll_write(void *data, const char __user *buf, |
be2154731 blk-mq: move hctx... |
537 538 |
size_t count, loff_t *ppos) { |
f57de23ac blk-mq-debugfs: g... |
539 |
struct blk_mq_hw_ctx *hctx = data; |
be2154731 blk-mq: move hctx... |
540 541 542 543 |
hctx->poll_considered = hctx->poll_invoked = hctx->poll_success = 0; return count; } |
f57de23ac blk-mq-debugfs: g... |
544 |
static int hctx_dispatched_show(void *data, struct seq_file *m) |
be2154731 blk-mq: move hctx... |
545 |
{ |
f57de23ac blk-mq-debugfs: g... |
546 |
struct blk_mq_hw_ctx *hctx = data; |
be2154731 blk-mq: move hctx... |
547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 |
int i; seq_printf(m, "%8u\t%lu ", 0U, hctx->dispatched[0]); for (i = 1; i < BLK_MQ_MAX_DISPATCH_ORDER - 1; i++) { unsigned int d = 1U << (i - 1); seq_printf(m, "%8u\t%lu ", d, hctx->dispatched[i]); } seq_printf(m, "%8u+\t%lu ", 1U << (i - 1), hctx->dispatched[i]); return 0; } |
f57de23ac blk-mq-debugfs: g... |
563 |
static ssize_t hctx_dispatched_write(void *data, const char __user *buf, |
be2154731 blk-mq: move hctx... |
564 565 |
size_t count, loff_t *ppos) { |
f57de23ac blk-mq-debugfs: g... |
566 |
struct blk_mq_hw_ctx *hctx = data; |
be2154731 blk-mq: move hctx... |
567 568 569 570 571 572 |
int i; for (i = 0; i < BLK_MQ_MAX_DISPATCH_ORDER; i++) hctx->dispatched[i] = 0; return count; } |
f57de23ac blk-mq-debugfs: g... |
573 |
static int hctx_queued_show(void *data, struct seq_file *m) |
4a46f05eb blk-mq: move hctx... |
574 |
{ |
f57de23ac blk-mq-debugfs: g... |
575 |
struct blk_mq_hw_ctx *hctx = data; |
4a46f05eb blk-mq: move hctx... |
576 577 578 579 580 |
seq_printf(m, "%lu ", hctx->queued); return 0; } |
f57de23ac blk-mq-debugfs: g... |
581 |
static ssize_t hctx_queued_write(void *data, const char __user *buf, |
4a46f05eb blk-mq: move hctx... |
582 583 |
size_t count, loff_t *ppos) { |
f57de23ac blk-mq-debugfs: g... |
584 |
struct blk_mq_hw_ctx *hctx = data; |
4a46f05eb blk-mq: move hctx... |
585 586 587 588 |
hctx->queued = 0; return count; } |
f57de23ac blk-mq-debugfs: g... |
589 |
static int hctx_run_show(void *data, struct seq_file *m) |
4a46f05eb blk-mq: move hctx... |
590 |
{ |
f57de23ac blk-mq-debugfs: g... |
591 |
struct blk_mq_hw_ctx *hctx = data; |
4a46f05eb blk-mq: move hctx... |
592 593 594 595 596 |
seq_printf(m, "%lu ", hctx->run); return 0; } |
f57de23ac blk-mq-debugfs: g... |
597 598 |
static ssize_t hctx_run_write(void *data, const char __user *buf, size_t count, loff_t *ppos) |
4a46f05eb blk-mq: move hctx... |
599 |
{ |
f57de23ac blk-mq-debugfs: g... |
600 |
struct blk_mq_hw_ctx *hctx = data; |
4a46f05eb blk-mq: move hctx... |
601 602 603 604 |
hctx->run = 0; return count; } |
f57de23ac blk-mq-debugfs: g... |
605 |
static int hctx_active_show(void *data, struct seq_file *m) |
4a46f05eb blk-mq: move hctx... |
606 |
{ |
f57de23ac blk-mq-debugfs: g... |
607 |
struct blk_mq_hw_ctx *hctx = data; |
4a46f05eb blk-mq: move hctx... |
608 609 610 611 612 |
seq_printf(m, "%d ", atomic_read(&hctx->nr_active)); return 0; } |
6e7687173 blk-mq: dequeue r... |
613 614 615 616 617 618 619 620 |
static int hctx_dispatch_busy_show(void *data, struct seq_file *m) { struct blk_mq_hw_ctx *hctx = data; seq_printf(m, "%u ", hctx->dispatch_busy); return 0; } |
c16d6b5a9 blk-mq: fix dispa... |
621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 |
#define CTX_RQ_SEQ_OPS(name, type) \ static void *ctx_##name##_rq_list_start(struct seq_file *m, loff_t *pos) \ __acquires(&ctx->lock) \ { \ struct blk_mq_ctx *ctx = m->private; \ \ spin_lock(&ctx->lock); \ return seq_list_start(&ctx->rq_lists[type], *pos); \ } \ \ static void *ctx_##name##_rq_list_next(struct seq_file *m, void *v, \ loff_t *pos) \ { \ struct blk_mq_ctx *ctx = m->private; \ \ return seq_list_next(v, &ctx->rq_lists[type], pos); \ } \ \ static void ctx_##name##_rq_list_stop(struct seq_file *m, void *v) \ __releases(&ctx->lock) \ { \ struct blk_mq_ctx *ctx = m->private; \ \ spin_unlock(&ctx->lock); \ } \ \ static const struct seq_operations ctx_##name##_rq_list_seq_ops = { \ .start = ctx_##name##_rq_list_start, \ .next = ctx_##name##_rq_list_next, \ .stop = ctx_##name##_rq_list_stop, \ .show = blk_mq_debugfs_rq_show, \ } CTX_RQ_SEQ_OPS(default, HCTX_TYPE_DEFAULT); CTX_RQ_SEQ_OPS(read, HCTX_TYPE_READ); CTX_RQ_SEQ_OPS(poll, HCTX_TYPE_POLL); |
950cd7e9f blk-mq: move hctx... |
657 |
|
f57de23ac blk-mq-debugfs: g... |
658 |
static int ctx_dispatched_show(void *data, struct seq_file *m) |
4a46f05eb blk-mq: move hctx... |
659 |
{ |
f57de23ac blk-mq-debugfs: g... |
660 |
struct blk_mq_ctx *ctx = data; |
4a46f05eb blk-mq: move hctx... |
661 662 663 664 665 |
seq_printf(m, "%lu %lu ", ctx->rq_dispatched[1], ctx->rq_dispatched[0]); return 0; } |
f57de23ac blk-mq-debugfs: g... |
666 |
static ssize_t ctx_dispatched_write(void *data, const char __user *buf, |
4a46f05eb blk-mq: move hctx... |
667 668 |
size_t count, loff_t *ppos) { |
f57de23ac blk-mq-debugfs: g... |
669 |
struct blk_mq_ctx *ctx = data; |
4a46f05eb blk-mq: move hctx... |
670 671 672 673 |
ctx->rq_dispatched[0] = ctx->rq_dispatched[1] = 0; return count; } |
f57de23ac blk-mq-debugfs: g... |
674 |
static int ctx_merged_show(void *data, struct seq_file *m) |
4a46f05eb blk-mq: move hctx... |
675 |
{ |
f57de23ac blk-mq-debugfs: g... |
676 |
struct blk_mq_ctx *ctx = data; |
4a46f05eb blk-mq: move hctx... |
677 678 679 680 681 |
seq_printf(m, "%lu ", ctx->rq_merged); return 0; } |
f57de23ac blk-mq-debugfs: g... |
682 683 |
static ssize_t ctx_merged_write(void *data, const char __user *buf, size_t count, loff_t *ppos) |
4a46f05eb blk-mq: move hctx... |
684 |
{ |
f57de23ac blk-mq-debugfs: g... |
685 |
struct blk_mq_ctx *ctx = data; |
4a46f05eb blk-mq: move hctx... |
686 687 688 689 |
ctx->rq_merged = 0; return count; } |
f57de23ac blk-mq-debugfs: g... |
690 |
static int ctx_completed_show(void *data, struct seq_file *m) |
4a46f05eb blk-mq: move hctx... |
691 |
{ |
f57de23ac blk-mq-debugfs: g... |
692 |
struct blk_mq_ctx *ctx = data; |
4a46f05eb blk-mq: move hctx... |
693 694 695 696 697 |
seq_printf(m, "%lu %lu ", ctx->rq_completed[1], ctx->rq_completed[0]); return 0; } |
f57de23ac blk-mq-debugfs: g... |
698 699 |
static ssize_t ctx_completed_write(void *data, const char __user *buf, size_t count, loff_t *ppos) |
4a46f05eb blk-mq: move hctx... |
700 |
{ |
f57de23ac blk-mq-debugfs: g... |
701 702 703 704 |
struct blk_mq_ctx *ctx = data; ctx->rq_completed[0] = ctx->rq_completed[1] = 0; return count; |
4a46f05eb blk-mq: move hctx... |
705 |
} |
f57de23ac blk-mq-debugfs: g... |
706 707 708 709 710 711 712 713 714 715 |
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) |
4a46f05eb blk-mq: move hctx... |
716 717 |
{ struct seq_file *m = file->private_data; |
f57de23ac blk-mq-debugfs: g... |
718 719 |
const struct blk_mq_debugfs_attr *attr = m->private; void *data = d_inode(file->f_path.dentry->d_parent)->i_private; |
4a46f05eb blk-mq: move hctx... |
720 |
|
6b136a24b blk-mq-debugfs: d... |
721 722 723 724 725 |
/* * Attributes that only implement .seq_ops are read-only and 'attr' is * the same with 'data' in this case. */ if (attr == data || !attr->write) |
f57de23ac blk-mq-debugfs: g... |
726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 |
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); |
4a46f05eb blk-mq: move hctx... |
751 |
} |
f57de23ac blk-mq-debugfs: g... |
752 753 754 755 756 757 |
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); |
ee1e03598 block: get rid of... |
758 759 |
return seq_release(inode, file); |
f57de23ac blk-mq-debugfs: g... |
760 |
} |
f84659339 blk-mq-debugfs: D... |
761 |
static const struct file_operations blk_mq_debugfs_fops = { |
f57de23ac blk-mq-debugfs: g... |
762 |
.open = blk_mq_debugfs_open, |
4a46f05eb blk-mq: move hctx... |
763 |
.read = seq_read, |
f57de23ac blk-mq-debugfs: g... |
764 |
.write = blk_mq_debugfs_write, |
4a46f05eb blk-mq: move hctx... |
765 |
.llseek = seq_lseek, |
f57de23ac blk-mq-debugfs: g... |
766 |
.release = blk_mq_debugfs_release, |
4a46f05eb blk-mq: move hctx... |
767 |
}; |
07e4fead4 blk-mq: create de... |
768 |
static const struct blk_mq_debugfs_attr blk_mq_debugfs_hctx_attrs[] = { |
f57de23ac blk-mq-debugfs: g... |
769 770 771 |
{"state", 0400, hctx_state_show}, {"flags", 0400, hctx_flags_show}, {"dispatch", 0400, .seq_ops = &hctx_dispatch_seq_ops}, |
2720bab50 blk-mq-debugfs: S... |
772 |
{"busy", 0400, hctx_busy_show}, |
f57de23ac blk-mq-debugfs: g... |
773 774 775 776 777 778 779 780 781 782 |
{"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}, |
6e7687173 blk-mq: dequeue r... |
783 |
{"dispatch_busy", 0400, hctx_dispatch_busy_show}, |
346fc1089 blk-mq: export hc... |
784 |
{"type", 0400, hctx_type_show}, |
72f2f8f69 blk-mq-debug: Int... |
785 |
{}, |
07e4fead4 blk-mq: create de... |
786 787 788 |
}; static const struct blk_mq_debugfs_attr blk_mq_debugfs_ctx_attrs[] = { |
c16d6b5a9 blk-mq: fix dispa... |
789 790 791 |
{"default_rq_list", 0400, .seq_ops = &ctx_default_rq_list_seq_ops}, {"read_rq_list", 0400, .seq_ops = &ctx_read_rq_list_seq_ops}, {"poll_rq_list", 0400, .seq_ops = &ctx_poll_rq_list_seq_ops}, |
f57de23ac blk-mq-debugfs: g... |
792 793 794 |
{"dispatched", 0600, ctx_dispatched_show, ctx_dispatched_write}, {"merged", 0600, ctx_merged_show, ctx_merged_write}, {"completed", 0600, ctx_completed_show, ctx_completed_write}, |
72f2f8f69 blk-mq-debug: Int... |
795 |
{}, |
07e4fead4 blk-mq: create de... |
796 |
}; |
6cfc0081b blk-mq: no need t... |
797 |
static void debugfs_create_files(struct dentry *parent, void *data, |
9c1051aac blk-mq: untangle ... |
798 799 |
const struct blk_mq_debugfs_attr *attr) { |
36991ca68 blk-mq: protect d... |
800 |
if (IS_ERR_OR_NULL(parent)) |
6cfc0081b blk-mq: no need t... |
801 |
return; |
36991ca68 blk-mq: protect d... |
802 |
|
9c1051aac blk-mq: untangle ... |
803 |
d_inode(parent)->i_private = data; |
6cfc0081b blk-mq: no need t... |
804 805 806 |
for (; attr->name; attr++) debugfs_create_file(attr->name, attr->mode, parent, (void *)attr, &blk_mq_debugfs_fops); |
9c1051aac blk-mq: untangle ... |
807 |
} |
6cfc0081b blk-mq: no need t... |
808 |
void blk_mq_debugfs_register(struct request_queue *q) |
07e4fead4 blk-mq: create de... |
809 |
{ |
9c1051aac blk-mq: untangle ... |
810 811 |
struct blk_mq_hw_ctx *hctx; int i; |
4c9e4019f blk-mq: Let blk_m... |
812 813 |
q->debugfs_dir = debugfs_create_dir(kobject_name(q->kobj.parent), blk_debugfs_root); |
07e4fead4 blk-mq: create de... |
814 |
|
6cfc0081b blk-mq: no need t... |
815 |
debugfs_create_files(q->debugfs_dir, q, blk_mq_debugfs_queue_attrs); |
07e4fead4 blk-mq: create de... |
816 |
|
9c1051aac blk-mq: untangle ... |
817 |
/* |
70e62f4ba blk-mq-debugfs: f... |
818 |
* blk_mq_init_sched() attempted to do this already, but q->debugfs_dir |
9c1051aac blk-mq: untangle ... |
819 820 821 |
* didn't exist yet (because we don't know what to name the directory * until the queue is registered to a gendisk). */ |
70e62f4ba blk-mq-debugfs: f... |
822 823 824 825 |
if (q->elevator && !q->sched_debugfs_dir) blk_mq_debugfs_register_sched(q); /* Similarly, blk_mq_init_hctx() couldn't do this previously. */ |
9c1051aac blk-mq: untangle ... |
826 |
queue_for_each_hw_ctx(q, hctx, i) { |
6cfc0081b blk-mq: no need t... |
827 828 829 830 |
if (!hctx->debugfs_dir) blk_mq_debugfs_register_hctx(q, hctx); if (q->elevator && !hctx->sched_debugfs_dir) blk_mq_debugfs_register_sched_hctx(q, hctx); |
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831 |
} |
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if (q->rq_qos) { struct rq_qos *rqos = q->rq_qos; while (rqos) { blk_mq_debugfs_register_rqos(rqos); rqos = rqos->next; } } |
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} void blk_mq_debugfs_unregister(struct request_queue *q) { debugfs_remove_recursive(q->debugfs_dir); |
d332ce091 blk-mq-debugfs: a... |
845 |
q->sched_debugfs_dir = NULL; |
07e4fead4 blk-mq: create de... |
846 847 |
q->debugfs_dir = NULL; } |
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848 849 |
static void blk_mq_debugfs_register_ctx(struct blk_mq_hw_ctx *hctx, struct blk_mq_ctx *ctx) |
07e4fead4 blk-mq: create de... |
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{ struct dentry *ctx_dir; char name[20]; |
07e4fead4 blk-mq: create de... |
853 854 |
snprintf(name, sizeof(name), "cpu%u", ctx->cpu); |
9c1051aac blk-mq: untangle ... |
855 |
ctx_dir = debugfs_create_dir(name, hctx->debugfs_dir); |
07e4fead4 blk-mq: create de... |
856 |
|
6cfc0081b blk-mq: no need t... |
857 |
debugfs_create_files(ctx_dir, ctx, blk_mq_debugfs_ctx_attrs); |
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858 |
} |
6cfc0081b blk-mq: no need t... |
859 860 |
void blk_mq_debugfs_register_hctx(struct request_queue *q, struct blk_mq_hw_ctx *hctx) |
07e4fead4 blk-mq: create de... |
861 862 |
{ struct blk_mq_ctx *ctx; |
07e4fead4 blk-mq: create de... |
863 864 |
char name[20]; int i; |
88aabbd7e blk-mq-debugfs: r... |
865 |
snprintf(name, sizeof(name), "hctx%u", hctx->queue_num); |
9c1051aac blk-mq: untangle ... |
866 |
hctx->debugfs_dir = debugfs_create_dir(name, q->debugfs_dir); |
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867 |
|
6cfc0081b blk-mq: no need t... |
868 |
debugfs_create_files(hctx->debugfs_dir, hctx, blk_mq_debugfs_hctx_attrs); |
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869 |
|
6cfc0081b blk-mq: no need t... |
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hctx_for_each_ctx(hctx, ctx, i) blk_mq_debugfs_register_ctx(hctx, ctx); |
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} void blk_mq_debugfs_unregister_hctx(struct blk_mq_hw_ctx *hctx) { debugfs_remove_recursive(hctx->debugfs_dir); |
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877 |
hctx->sched_debugfs_dir = NULL; |
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878 |
hctx->debugfs_dir = NULL; |
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879 |
} |
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880 |
void blk_mq_debugfs_register_hctxs(struct request_queue *q) |
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881 882 883 |
{ struct blk_mq_hw_ctx *hctx; int i; |
6cfc0081b blk-mq: no need t... |
884 885 |
queue_for_each_hw_ctx(q, hctx, i) blk_mq_debugfs_register_hctx(q, hctx); |
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886 |
} |
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887 |
void blk_mq_debugfs_unregister_hctxs(struct request_queue *q) |
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888 |
{ |
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struct blk_mq_hw_ctx *hctx; int i; queue_for_each_hw_ctx(q, hctx, i) blk_mq_debugfs_unregister_hctx(hctx); |
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894 |
} |
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895 |
|
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void blk_mq_debugfs_register_sched(struct request_queue *q) |
d332ce091 blk-mq-debugfs: a... |
897 898 |
{ struct elevator_type *e = q->elevator->type; |
7e41c3c9b blk-mq: fix up pl... |
899 900 901 902 903 904 |
/* * If the parent directory has not been created yet, return, we will be * called again later on and the directory/files will be created then. */ if (!q->debugfs_dir) return; |
d332ce091 blk-mq-debugfs: a... |
905 |
if (!e->queue_debugfs_attrs) |
6cfc0081b blk-mq: no need t... |
906 |
return; |
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q->sched_debugfs_dir = debugfs_create_dir("sched", q->debugfs_dir); |
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909 |
|
6cfc0081b blk-mq: no need t... |
910 |
debugfs_create_files(q->sched_debugfs_dir, q, e->queue_debugfs_attrs); |
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} void blk_mq_debugfs_unregister_sched(struct request_queue *q) { debugfs_remove_recursive(q->sched_debugfs_dir); q->sched_debugfs_dir = NULL; } |
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void blk_mq_debugfs_unregister_rqos(struct rq_qos *rqos) { debugfs_remove_recursive(rqos->debugfs_dir); rqos->debugfs_dir = NULL; } |
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923 |
void blk_mq_debugfs_register_rqos(struct rq_qos *rqos) |
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{ struct request_queue *q = rqos->q; const char *dir_name = rq_qos_id_to_name(rqos->id); |
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927 |
if (rqos->debugfs_dir || !rqos->ops->debugfs_attrs) |
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928 |
return; |
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929 |
|
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930 |
if (!q->rqos_debugfs_dir) |
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931 932 |
q->rqos_debugfs_dir = debugfs_create_dir("rqos", q->debugfs_dir); |
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933 934 935 |
rqos->debugfs_dir = debugfs_create_dir(dir_name, rqos->q->rqos_debugfs_dir); |
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936 |
|
6cfc0081b blk-mq: no need t... |
937 |
debugfs_create_files(rqos->debugfs_dir, rqos, rqos->ops->debugfs_attrs); |
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938 939 940 941 942 943 944 |
} void blk_mq_debugfs_unregister_queue_rqos(struct request_queue *q) { debugfs_remove_recursive(q->rqos_debugfs_dir); q->rqos_debugfs_dir = NULL; } |
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945 946 |
void blk_mq_debugfs_register_sched_hctx(struct request_queue *q, struct blk_mq_hw_ctx *hctx) |
d332ce091 blk-mq-debugfs: a... |
947 948 |
{ struct elevator_type *e = q->elevator->type; |
d332ce091 blk-mq-debugfs: a... |
949 |
if (!e->hctx_debugfs_attrs) |
6cfc0081b blk-mq: no need t... |
950 |
return; |
d332ce091 blk-mq-debugfs: a... |
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hctx->sched_debugfs_dir = debugfs_create_dir("sched", hctx->debugfs_dir); |
6cfc0081b blk-mq: no need t... |
954 955 |
debugfs_create_files(hctx->sched_debugfs_dir, hctx, e->hctx_debugfs_attrs); |
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956 957 958 959 960 961 962 |
} void blk_mq_debugfs_unregister_sched_hctx(struct blk_mq_hw_ctx *hctx) { debugfs_remove_recursive(hctx->sched_debugfs_dir); hctx->sched_debugfs_dir = NULL; } |