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block/blk-mq-debugfs.c
24.4 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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}; |
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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; } |
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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... |
429 |
static int hctx_ctx_map_show(void *data, struct seq_file *m) |
0bfa5288a blk-mq: export so... |
430 |
{ |
f57de23ac blk-mq-debugfs: g... |
431 |
struct blk_mq_hw_ctx *hctx = data; |
0bfa5288a blk-mq: export so... |
432 433 434 435 |
sbitmap_bitmap_show(&hctx->ctx_map, m); return 0; } |
d96b37c0a blk-mq: move tags... |
436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 |
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... |
459 |
static int hctx_tags_show(void *data, struct seq_file *m) |
d96b37c0a blk-mq: move tags... |
460 |
{ |
f57de23ac blk-mq-debugfs: g... |
461 |
struct blk_mq_hw_ctx *hctx = data; |
d96b37c0a blk-mq: move tags... |
462 |
struct request_queue *q = hctx->queue; |
8c0f14eab blk-mq-debug: Mak... |
463 |
int res; |
d96b37c0a blk-mq: move tags... |
464 |
|
8c0f14eab blk-mq-debug: Mak... |
465 466 467 |
res = mutex_lock_interruptible(&q->sysfs_lock); if (res) goto out; |
d96b37c0a blk-mq: move tags... |
468 469 470 |
if (hctx->tags) blk_mq_debugfs_tags_show(m, hctx->tags); mutex_unlock(&q->sysfs_lock); |
8c0f14eab blk-mq-debug: Mak... |
471 472 |
out: return res; |
d96b37c0a blk-mq: move tags... |
473 |
} |
f57de23ac blk-mq-debugfs: g... |
474 |
static int hctx_tags_bitmap_show(void *data, struct seq_file *m) |
d7e3621ad blk-mq: add tags ... |
475 |
{ |
f57de23ac blk-mq-debugfs: g... |
476 |
struct blk_mq_hw_ctx *hctx = data; |
d7e3621ad blk-mq: add tags ... |
477 |
struct request_queue *q = hctx->queue; |
8c0f14eab blk-mq-debug: Mak... |
478 |
int res; |
d7e3621ad blk-mq: add tags ... |
479 |
|
8c0f14eab blk-mq-debug: Mak... |
480 481 482 |
res = mutex_lock_interruptible(&q->sysfs_lock); if (res) goto out; |
d7e3621ad blk-mq: add tags ... |
483 484 485 |
if (hctx->tags) sbitmap_bitmap_show(&hctx->tags->bitmap_tags.sb, m); mutex_unlock(&q->sysfs_lock); |
8c0f14eab blk-mq-debug: Mak... |
486 487 488 |
out: return res; |
d7e3621ad blk-mq: add tags ... |
489 |
} |
f57de23ac blk-mq-debugfs: g... |
490 |
static int hctx_sched_tags_show(void *data, struct seq_file *m) |
d96b37c0a blk-mq: move tags... |
491 |
{ |
f57de23ac blk-mq-debugfs: g... |
492 |
struct blk_mq_hw_ctx *hctx = data; |
d96b37c0a blk-mq: move tags... |
493 |
struct request_queue *q = hctx->queue; |
8c0f14eab blk-mq-debug: Mak... |
494 |
int res; |
d96b37c0a blk-mq: move tags... |
495 |
|
8c0f14eab blk-mq-debug: Mak... |
496 497 498 |
res = mutex_lock_interruptible(&q->sysfs_lock); if (res) goto out; |
d96b37c0a blk-mq: move tags... |
499 500 501 |
if (hctx->sched_tags) blk_mq_debugfs_tags_show(m, hctx->sched_tags); mutex_unlock(&q->sysfs_lock); |
8c0f14eab blk-mq-debug: Mak... |
502 503 |
out: return res; |
d96b37c0a blk-mq: move tags... |
504 |
} |
f57de23ac blk-mq-debugfs: g... |
505 |
static int hctx_sched_tags_bitmap_show(void *data, struct seq_file *m) |
d7e3621ad blk-mq: add tags ... |
506 |
{ |
f57de23ac blk-mq-debugfs: g... |
507 |
struct blk_mq_hw_ctx *hctx = data; |
d7e3621ad blk-mq: add tags ... |
508 |
struct request_queue *q = hctx->queue; |
8c0f14eab blk-mq-debug: Mak... |
509 |
int res; |
d7e3621ad blk-mq: add tags ... |
510 |
|
8c0f14eab blk-mq-debug: Mak... |
511 512 513 |
res = mutex_lock_interruptible(&q->sysfs_lock); if (res) goto out; |
d7e3621ad blk-mq: add tags ... |
514 515 516 |
if (hctx->sched_tags) sbitmap_bitmap_show(&hctx->sched_tags->bitmap_tags.sb, m); mutex_unlock(&q->sysfs_lock); |
8c0f14eab blk-mq-debug: Mak... |
517 518 519 |
out: return res; |
d7e3621ad blk-mq: add tags ... |
520 |
} |
f57de23ac blk-mq-debugfs: g... |
521 |
static int hctx_io_poll_show(void *data, struct seq_file *m) |
be2154731 blk-mq: move hctx... |
522 |
{ |
f57de23ac blk-mq-debugfs: g... |
523 |
struct blk_mq_hw_ctx *hctx = data; |
be2154731 blk-mq: move hctx... |
524 525 526 527 528 529 530 531 532 |
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... |
533 |
static ssize_t hctx_io_poll_write(void *data, const char __user *buf, |
be2154731 blk-mq: move hctx... |
534 535 |
size_t count, loff_t *ppos) { |
f57de23ac blk-mq-debugfs: g... |
536 |
struct blk_mq_hw_ctx *hctx = data; |
be2154731 blk-mq: move hctx... |
537 538 539 540 |
hctx->poll_considered = hctx->poll_invoked = hctx->poll_success = 0; return count; } |
f57de23ac blk-mq-debugfs: g... |
541 |
static int hctx_dispatched_show(void *data, struct seq_file *m) |
be2154731 blk-mq: move hctx... |
542 |
{ |
f57de23ac blk-mq-debugfs: g... |
543 |
struct blk_mq_hw_ctx *hctx = data; |
be2154731 blk-mq: move hctx... |
544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 |
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... |
560 |
static ssize_t hctx_dispatched_write(void *data, const char __user *buf, |
be2154731 blk-mq: move hctx... |
561 562 |
size_t count, loff_t *ppos) { |
f57de23ac blk-mq-debugfs: g... |
563 |
struct blk_mq_hw_ctx *hctx = data; |
be2154731 blk-mq: move hctx... |
564 565 566 567 568 569 |
int i; for (i = 0; i < BLK_MQ_MAX_DISPATCH_ORDER; i++) hctx->dispatched[i] = 0; return count; } |
f57de23ac blk-mq-debugfs: g... |
570 |
static int hctx_queued_show(void *data, struct seq_file *m) |
4a46f05eb blk-mq: move hctx... |
571 |
{ |
f57de23ac blk-mq-debugfs: g... |
572 |
struct blk_mq_hw_ctx *hctx = data; |
4a46f05eb blk-mq: move hctx... |
573 574 575 576 577 |
seq_printf(m, "%lu ", hctx->queued); return 0; } |
f57de23ac blk-mq-debugfs: g... |
578 |
static ssize_t hctx_queued_write(void *data, const char __user *buf, |
4a46f05eb blk-mq: move hctx... |
579 580 |
size_t count, loff_t *ppos) { |
f57de23ac blk-mq-debugfs: g... |
581 |
struct blk_mq_hw_ctx *hctx = data; |
4a46f05eb blk-mq: move hctx... |
582 583 584 585 |
hctx->queued = 0; return count; } |
f57de23ac blk-mq-debugfs: g... |
586 |
static int hctx_run_show(void *data, struct seq_file *m) |
4a46f05eb blk-mq: move hctx... |
587 |
{ |
f57de23ac blk-mq-debugfs: g... |
588 |
struct blk_mq_hw_ctx *hctx = data; |
4a46f05eb blk-mq: move hctx... |
589 590 591 592 593 |
seq_printf(m, "%lu ", hctx->run); return 0; } |
f57de23ac blk-mq-debugfs: g... |
594 595 |
static ssize_t hctx_run_write(void *data, const char __user *buf, size_t count, loff_t *ppos) |
4a46f05eb blk-mq: move hctx... |
596 |
{ |
f57de23ac blk-mq-debugfs: g... |
597 |
struct blk_mq_hw_ctx *hctx = data; |
4a46f05eb blk-mq: move hctx... |
598 599 600 601 |
hctx->run = 0; return count; } |
f57de23ac blk-mq-debugfs: g... |
602 |
static int hctx_active_show(void *data, struct seq_file *m) |
4a46f05eb blk-mq: move hctx... |
603 |
{ |
f57de23ac blk-mq-debugfs: g... |
604 |
struct blk_mq_hw_ctx *hctx = data; |
4a46f05eb blk-mq: move hctx... |
605 606 607 608 609 |
seq_printf(m, "%d ", atomic_read(&hctx->nr_active)); return 0; } |
6e7687173 blk-mq: dequeue r... |
610 611 612 613 614 615 616 617 |
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... |
618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 |
#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... |
654 |
|
f57de23ac blk-mq-debugfs: g... |
655 |
static int ctx_dispatched_show(void *data, struct seq_file *m) |
4a46f05eb blk-mq: move hctx... |
656 |
{ |
f57de23ac blk-mq-debugfs: g... |
657 |
struct blk_mq_ctx *ctx = data; |
4a46f05eb blk-mq: move hctx... |
658 659 660 661 662 |
seq_printf(m, "%lu %lu ", ctx->rq_dispatched[1], ctx->rq_dispatched[0]); return 0; } |
f57de23ac blk-mq-debugfs: g... |
663 |
static ssize_t ctx_dispatched_write(void *data, const char __user *buf, |
4a46f05eb blk-mq: move hctx... |
664 665 |
size_t count, loff_t *ppos) { |
f57de23ac blk-mq-debugfs: g... |
666 |
struct blk_mq_ctx *ctx = data; |
4a46f05eb blk-mq: move hctx... |
667 668 669 670 |
ctx->rq_dispatched[0] = ctx->rq_dispatched[1] = 0; return count; } |
f57de23ac blk-mq-debugfs: g... |
671 |
static int ctx_merged_show(void *data, struct seq_file *m) |
4a46f05eb blk-mq: move hctx... |
672 |
{ |
f57de23ac blk-mq-debugfs: g... |
673 |
struct blk_mq_ctx *ctx = data; |
4a46f05eb blk-mq: move hctx... |
674 675 676 677 678 |
seq_printf(m, "%lu ", ctx->rq_merged); return 0; } |
f57de23ac blk-mq-debugfs: g... |
679 680 |
static ssize_t ctx_merged_write(void *data, const char __user *buf, size_t count, loff_t *ppos) |
4a46f05eb blk-mq: move hctx... |
681 |
{ |
f57de23ac blk-mq-debugfs: g... |
682 |
struct blk_mq_ctx *ctx = data; |
4a46f05eb blk-mq: move hctx... |
683 684 685 686 |
ctx->rq_merged = 0; return count; } |
f57de23ac blk-mq-debugfs: g... |
687 |
static int ctx_completed_show(void *data, struct seq_file *m) |
4a46f05eb blk-mq: move hctx... |
688 |
{ |
f57de23ac blk-mq-debugfs: g... |
689 |
struct blk_mq_ctx *ctx = data; |
4a46f05eb blk-mq: move hctx... |
690 691 692 693 694 |
seq_printf(m, "%lu %lu ", ctx->rq_completed[1], ctx->rq_completed[0]); return 0; } |
f57de23ac blk-mq-debugfs: g... |
695 696 |
static ssize_t ctx_completed_write(void *data, const char __user *buf, size_t count, loff_t *ppos) |
4a46f05eb blk-mq: move hctx... |
697 |
{ |
f57de23ac blk-mq-debugfs: g... |
698 699 700 701 |
struct blk_mq_ctx *ctx = data; ctx->rq_completed[0] = ctx->rq_completed[1] = 0; return count; |
4a46f05eb blk-mq: move hctx... |
702 |
} |
f57de23ac blk-mq-debugfs: g... |
703 704 705 706 707 708 709 710 711 712 |
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... |
713 714 |
{ struct seq_file *m = file->private_data; |
f57de23ac blk-mq-debugfs: g... |
715 716 |
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... |
717 |
|
6b136a24b blk-mq-debugfs: d... |
718 719 720 721 722 |
/* * 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... |
723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 |
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... |
748 |
} |
f57de23ac blk-mq-debugfs: g... |
749 750 751 752 753 754 |
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... |
755 756 |
return seq_release(inode, file); |
f57de23ac blk-mq-debugfs: g... |
757 |
} |
f84659339 blk-mq-debugfs: D... |
758 |
static const struct file_operations blk_mq_debugfs_fops = { |
f57de23ac blk-mq-debugfs: g... |
759 |
.open = blk_mq_debugfs_open, |
4a46f05eb blk-mq: move hctx... |
760 |
.read = seq_read, |
f57de23ac blk-mq-debugfs: g... |
761 |
.write = blk_mq_debugfs_write, |
4a46f05eb blk-mq: move hctx... |
762 |
.llseek = seq_lseek, |
f57de23ac blk-mq-debugfs: g... |
763 |
.release = blk_mq_debugfs_release, |
4a46f05eb blk-mq: move hctx... |
764 |
}; |
07e4fead4 blk-mq: create de... |
765 |
static const struct blk_mq_debugfs_attr blk_mq_debugfs_hctx_attrs[] = { |
f57de23ac blk-mq-debugfs: g... |
766 767 768 |
{"state", 0400, hctx_state_show}, {"flags", 0400, hctx_flags_show}, {"dispatch", 0400, .seq_ops = &hctx_dispatch_seq_ops}, |
2720bab50 blk-mq-debugfs: S... |
769 |
{"busy", 0400, hctx_busy_show}, |
f57de23ac blk-mq-debugfs: g... |
770 771 772 773 774 775 776 777 778 779 |
{"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... |
780 |
{"dispatch_busy", 0400, hctx_dispatch_busy_show}, |
346fc1089 blk-mq: export hc... |
781 |
{"type", 0400, hctx_type_show}, |
72f2f8f69 blk-mq-debug: Int... |
782 |
{}, |
07e4fead4 blk-mq: create de... |
783 784 785 |
}; static const struct blk_mq_debugfs_attr blk_mq_debugfs_ctx_attrs[] = { |
c16d6b5a9 blk-mq: fix dispa... |
786 787 788 |
{"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... |
789 790 791 |
{"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... |
792 |
{}, |
07e4fead4 blk-mq: create de... |
793 |
}; |
6cfc0081b blk-mq: no need t... |
794 |
static void debugfs_create_files(struct dentry *parent, void *data, |
9c1051aac blk-mq: untangle ... |
795 796 |
const struct blk_mq_debugfs_attr *attr) { |
36991ca68 blk-mq: protect d... |
797 |
if (IS_ERR_OR_NULL(parent)) |
6cfc0081b blk-mq: no need t... |
798 |
return; |
36991ca68 blk-mq: protect d... |
799 |
|
9c1051aac blk-mq: untangle ... |
800 |
d_inode(parent)->i_private = data; |
6cfc0081b blk-mq: no need t... |
801 802 803 |
for (; attr->name; attr++) debugfs_create_file(attr->name, attr->mode, parent, (void *)attr, &blk_mq_debugfs_fops); |
9c1051aac blk-mq: untangle ... |
804 |
} |
6cfc0081b blk-mq: no need t... |
805 |
void blk_mq_debugfs_register(struct request_queue *q) |
07e4fead4 blk-mq: create de... |
806 |
{ |
9c1051aac blk-mq: untangle ... |
807 808 |
struct blk_mq_hw_ctx *hctx; int i; |
4c9e4019f blk-mq: Let blk_m... |
809 810 |
q->debugfs_dir = debugfs_create_dir(kobject_name(q->kobj.parent), blk_debugfs_root); |
07e4fead4 blk-mq: create de... |
811 |
|
6cfc0081b blk-mq: no need t... |
812 |
debugfs_create_files(q->debugfs_dir, q, blk_mq_debugfs_queue_attrs); |
07e4fead4 blk-mq: create de... |
813 |
|
9c1051aac blk-mq: untangle ... |
814 |
/* |
70e62f4ba blk-mq-debugfs: f... |
815 |
* blk_mq_init_sched() attempted to do this already, but q->debugfs_dir |
9c1051aac blk-mq: untangle ... |
816 817 818 |
* 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... |
819 820 821 822 |
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 ... |
823 |
queue_for_each_hw_ctx(q, hctx, i) { |
6cfc0081b blk-mq: no need t... |
824 825 826 827 |
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); |
9c1051aac blk-mq: untangle ... |
828 |
} |
cc56694f1 blk-mq-debugfs: s... |
829 830 831 832 833 834 835 836 |
if (q->rq_qos) { struct rq_qos *rqos = q->rq_qos; while (rqos) { blk_mq_debugfs_register_rqos(rqos); rqos = rqos->next; } } |
07e4fead4 blk-mq: create de... |
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} void blk_mq_debugfs_unregister(struct request_queue *q) { debugfs_remove_recursive(q->debugfs_dir); |
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q->sched_debugfs_dir = NULL; |
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q->debugfs_dir = NULL; } |
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static void blk_mq_debugfs_register_ctx(struct blk_mq_hw_ctx *hctx, struct blk_mq_ctx *ctx) |
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{ struct dentry *ctx_dir; char name[20]; |
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snprintf(name, sizeof(name), "cpu%u", ctx->cpu); |
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ctx_dir = debugfs_create_dir(name, hctx->debugfs_dir); |
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853 |
|
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debugfs_create_files(ctx_dir, ctx, blk_mq_debugfs_ctx_attrs); |
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855 |
} |
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void blk_mq_debugfs_register_hctx(struct request_queue *q, struct blk_mq_hw_ctx *hctx) |
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{ struct blk_mq_ctx *ctx; |
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char name[20]; int i; |
88aabbd7e blk-mq-debugfs: r... |
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snprintf(name, sizeof(name), "hctx%u", hctx->queue_num); |
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hctx->debugfs_dir = debugfs_create_dir(name, q->debugfs_dir); |
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|
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debugfs_create_files(hctx->debugfs_dir, hctx, blk_mq_debugfs_hctx_attrs); |
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|
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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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hctx->sched_debugfs_dir = NULL; |
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hctx->debugfs_dir = NULL; |
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} |
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void blk_mq_debugfs_register_hctxs(struct request_queue *q) |
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{ struct blk_mq_hw_ctx *hctx; int i; |
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queue_for_each_hw_ctx(q, hctx, i) blk_mq_debugfs_register_hctx(q, hctx); |
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883 |
} |
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void blk_mq_debugfs_unregister_hctxs(struct request_queue *q) |
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{ |
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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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} |
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|
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void blk_mq_debugfs_register_sched(struct request_queue *q) |
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{ struct elevator_type *e = q->elevator->type; |
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/* * 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; |
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if (!e->queue_debugfs_attrs) |
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return; |
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q->sched_debugfs_dir = debugfs_create_dir("sched", q->debugfs_dir); |
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|
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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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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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if (rqos->debugfs_dir || !rqos->ops->debugfs_attrs) |
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return; |
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|
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if (!q->rqos_debugfs_dir) |
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q->rqos_debugfs_dir = debugfs_create_dir("rqos", q->debugfs_dir); |
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rqos->debugfs_dir = debugfs_create_dir(dir_name, rqos->q->rqos_debugfs_dir); |
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|
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debugfs_create_files(rqos->debugfs_dir, rqos, rqos->ops->debugfs_attrs); |
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} 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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void blk_mq_debugfs_register_sched_hctx(struct request_queue *q, struct blk_mq_hw_ctx *hctx) |
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{ struct elevator_type *e = q->elevator->type; |
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if (!e->hctx_debugfs_attrs) |
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return; |
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hctx->sched_debugfs_dir = debugfs_create_dir("sched", hctx->debugfs_dir); |
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debugfs_create_files(hctx->sched_debugfs_dir, hctx, e->hctx_debugfs_attrs); |
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} 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; } |