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block/blk-mq-debugfs.c
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/* * Copyright (C) 2017 Facebook * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public * License v2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <https://www.gnu.org/licenses/>. */ #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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static void print_stat(struct seq_file *m, struct blk_rq_stat *stat) { if (stat->nr_samples) { seq_printf(m, "samples=%d, mean=%lld, min=%llu, max=%llu", 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; 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]); seq_puts(m, " "); seq_printf(m, "write (%d Bytes): ", 1 << (9+bucket)); print_stat(m, &q->poll_stat[2*bucket+1]); 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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#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(QUEUED), QUEUE_FLAG_NAME(STOPPED), |
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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), |
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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), 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), |
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QUEUE_FLAG_NAME(SCSI_PASSTHROUGH), QUEUE_FLAG_NAME(QUIESCED), |
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QUEUE_FLAG_NAME(PREEMPT_ONLY), |
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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 }, { "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), HCTX_FLAG_NAME(SG_MERGE), 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 REQ_OP_NAME(name) [REQ_OP_##name] = #name |
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static const char *const op_name[] = { |
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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), |
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}; |
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#undef REQ_OP_NAME |
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|
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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), CMD_FLAG_NAME(NOUNMAP), |
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CMD_FLAG_NAME(NOWAIT), |
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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(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), |
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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 = rq->cmd_flags & REQ_OP_MASK; |
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|
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seq_printf(m, "%p {.op=", rq); if (op < ARRAY_SIZE(op_name) && op_name[op]) seq_printf(m, "%s", op_name[op]); else seq_printf(m, "%d", op); 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, * e.g. due to a concurrent blk_mq_finish_request() call. */ static void hctx_show_busy_rq(struct request *rq, void *data, bool reserved) { const struct show_busy_params *params = data; if (blk_mq_map_queue(rq->q, rq->mq_ctx->cpu) == params->hctx && |
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blk_mq_rq_state(rq) != MQ_RQ_IDLE) |
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__blk_mq_debugfs_rq_show(params->m, list_entry_rq(&rq->queuelist)); } 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 int hctx_ctx_map_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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sbitmap_bitmap_show(&hctx->ctx_map, m); return 0; } |
d96b37c0a blk-mq: move tags... |
447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 |
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... |
470 |
static int hctx_tags_show(void *data, struct seq_file *m) |
d96b37c0a blk-mq: move tags... |
471 |
{ |
f57de23ac blk-mq-debugfs: g... |
472 |
struct blk_mq_hw_ctx *hctx = data; |
d96b37c0a blk-mq: move tags... |
473 |
struct request_queue *q = hctx->queue; |
8c0f14eab blk-mq-debug: Mak... |
474 |
int res; |
d96b37c0a blk-mq: move tags... |
475 |
|
8c0f14eab blk-mq-debug: Mak... |
476 477 478 |
res = mutex_lock_interruptible(&q->sysfs_lock); if (res) goto out; |
d96b37c0a blk-mq: move tags... |
479 480 481 |
if (hctx->tags) blk_mq_debugfs_tags_show(m, hctx->tags); mutex_unlock(&q->sysfs_lock); |
8c0f14eab blk-mq-debug: Mak... |
482 483 |
out: return res; |
d96b37c0a blk-mq: move tags... |
484 |
} |
f57de23ac blk-mq-debugfs: g... |
485 |
static int hctx_tags_bitmap_show(void *data, struct seq_file *m) |
d7e3621ad blk-mq: add tags ... |
486 |
{ |
f57de23ac blk-mq-debugfs: g... |
487 |
struct blk_mq_hw_ctx *hctx = data; |
d7e3621ad blk-mq: add tags ... |
488 |
struct request_queue *q = hctx->queue; |
8c0f14eab blk-mq-debug: Mak... |
489 |
int res; |
d7e3621ad blk-mq: add tags ... |
490 |
|
8c0f14eab blk-mq-debug: Mak... |
491 492 493 |
res = mutex_lock_interruptible(&q->sysfs_lock); if (res) goto out; |
d7e3621ad blk-mq: add tags ... |
494 495 496 |
if (hctx->tags) sbitmap_bitmap_show(&hctx->tags->bitmap_tags.sb, m); mutex_unlock(&q->sysfs_lock); |
8c0f14eab blk-mq-debug: Mak... |
497 498 499 |
out: return res; |
d7e3621ad blk-mq: add tags ... |
500 |
} |
f57de23ac blk-mq-debugfs: g... |
501 |
static int hctx_sched_tags_show(void *data, struct seq_file *m) |
d96b37c0a blk-mq: move tags... |
502 |
{ |
f57de23ac blk-mq-debugfs: g... |
503 |
struct blk_mq_hw_ctx *hctx = data; |
d96b37c0a blk-mq: move tags... |
504 |
struct request_queue *q = hctx->queue; |
8c0f14eab blk-mq-debug: Mak... |
505 |
int res; |
d96b37c0a blk-mq: move tags... |
506 |
|
8c0f14eab blk-mq-debug: Mak... |
507 508 509 |
res = mutex_lock_interruptible(&q->sysfs_lock); if (res) goto out; |
d96b37c0a blk-mq: move tags... |
510 511 512 |
if (hctx->sched_tags) blk_mq_debugfs_tags_show(m, hctx->sched_tags); mutex_unlock(&q->sysfs_lock); |
8c0f14eab blk-mq-debug: Mak... |
513 514 |
out: return res; |
d96b37c0a blk-mq: move tags... |
515 |
} |
f57de23ac blk-mq-debugfs: g... |
516 |
static int hctx_sched_tags_bitmap_show(void *data, struct seq_file *m) |
d7e3621ad blk-mq: add tags ... |
517 |
{ |
f57de23ac blk-mq-debugfs: g... |
518 |
struct blk_mq_hw_ctx *hctx = data; |
d7e3621ad blk-mq: add tags ... |
519 |
struct request_queue *q = hctx->queue; |
8c0f14eab blk-mq-debug: Mak... |
520 |
int res; |
d7e3621ad blk-mq: add tags ... |
521 |
|
8c0f14eab blk-mq-debug: Mak... |
522 523 524 |
res = mutex_lock_interruptible(&q->sysfs_lock); if (res) goto out; |
d7e3621ad blk-mq: add tags ... |
525 526 527 |
if (hctx->sched_tags) sbitmap_bitmap_show(&hctx->sched_tags->bitmap_tags.sb, m); mutex_unlock(&q->sysfs_lock); |
8c0f14eab blk-mq-debug: Mak... |
528 529 530 |
out: return res; |
d7e3621ad blk-mq: add tags ... |
531 |
} |
f57de23ac blk-mq-debugfs: g... |
532 |
static int hctx_io_poll_show(void *data, struct seq_file *m) |
be2154731 blk-mq: move hctx... |
533 |
{ |
f57de23ac blk-mq-debugfs: g... |
534 |
struct blk_mq_hw_ctx *hctx = data; |
be2154731 blk-mq: move hctx... |
535 536 537 538 539 540 541 542 543 |
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... |
544 |
static ssize_t hctx_io_poll_write(void *data, const char __user *buf, |
be2154731 blk-mq: move hctx... |
545 546 |
size_t count, loff_t *ppos) { |
f57de23ac blk-mq-debugfs: g... |
547 |
struct blk_mq_hw_ctx *hctx = data; |
be2154731 blk-mq: move hctx... |
548 549 550 551 |
hctx->poll_considered = hctx->poll_invoked = hctx->poll_success = 0; return count; } |
f57de23ac blk-mq-debugfs: g... |
552 |
static int hctx_dispatched_show(void *data, struct seq_file *m) |
be2154731 blk-mq: move hctx... |
553 |
{ |
f57de23ac blk-mq-debugfs: g... |
554 |
struct blk_mq_hw_ctx *hctx = data; |
be2154731 blk-mq: move hctx... |
555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 |
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... |
571 |
static ssize_t hctx_dispatched_write(void *data, const char __user *buf, |
be2154731 blk-mq: move hctx... |
572 573 |
size_t count, loff_t *ppos) { |
f57de23ac blk-mq-debugfs: g... |
574 |
struct blk_mq_hw_ctx *hctx = data; |
be2154731 blk-mq: move hctx... |
575 576 577 578 579 580 |
int i; for (i = 0; i < BLK_MQ_MAX_DISPATCH_ORDER; i++) hctx->dispatched[i] = 0; return count; } |
f57de23ac blk-mq-debugfs: g... |
581 |
static int hctx_queued_show(void *data, struct seq_file *m) |
4a46f05eb blk-mq: move hctx... |
582 |
{ |
f57de23ac blk-mq-debugfs: g... |
583 |
struct blk_mq_hw_ctx *hctx = data; |
4a46f05eb blk-mq: move hctx... |
584 585 586 587 588 |
seq_printf(m, "%lu ", hctx->queued); return 0; } |
f57de23ac blk-mq-debugfs: g... |
589 |
static ssize_t hctx_queued_write(void *data, const char __user *buf, |
4a46f05eb blk-mq: move hctx... |
590 591 |
size_t count, loff_t *ppos) { |
f57de23ac blk-mq-debugfs: g... |
592 |
struct blk_mq_hw_ctx *hctx = data; |
4a46f05eb blk-mq: move hctx... |
593 594 595 596 |
hctx->queued = 0; return count; } |
f57de23ac blk-mq-debugfs: g... |
597 |
static int hctx_run_show(void *data, struct seq_file *m) |
4a46f05eb blk-mq: move hctx... |
598 |
{ |
f57de23ac blk-mq-debugfs: g... |
599 |
struct blk_mq_hw_ctx *hctx = data; |
4a46f05eb blk-mq: move hctx... |
600 601 602 603 604 |
seq_printf(m, "%lu ", hctx->run); return 0; } |
f57de23ac blk-mq-debugfs: g... |
605 606 |
static ssize_t hctx_run_write(void *data, const char __user *buf, size_t count, loff_t *ppos) |
4a46f05eb blk-mq: move hctx... |
607 |
{ |
f57de23ac blk-mq-debugfs: g... |
608 |
struct blk_mq_hw_ctx *hctx = data; |
4a46f05eb blk-mq: move hctx... |
609 610 611 612 |
hctx->run = 0; return count; } |
f57de23ac blk-mq-debugfs: g... |
613 |
static int hctx_active_show(void *data, struct seq_file *m) |
4a46f05eb blk-mq: move hctx... |
614 |
{ |
f57de23ac blk-mq-debugfs: g... |
615 |
struct blk_mq_hw_ctx *hctx = data; |
4a46f05eb blk-mq: move hctx... |
616 617 618 619 620 |
seq_printf(m, "%d ", atomic_read(&hctx->nr_active)); return 0; } |
6e7687173 blk-mq: dequeue r... |
621 622 623 624 625 626 627 628 |
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; } |
950cd7e9f blk-mq: move hctx... |
629 |
static void *ctx_rq_list_start(struct seq_file *m, loff_t *pos) |
f3bcb0e60 blk-mq-debugfs: A... |
630 |
__acquires(&ctx->lock) |
950cd7e9f blk-mq: move hctx... |
631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 |
{ struct blk_mq_ctx *ctx = m->private; spin_lock(&ctx->lock); return seq_list_start(&ctx->rq_list, *pos); } static void *ctx_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_list, pos); } static void ctx_rq_list_stop(struct seq_file *m, void *v) |
f3bcb0e60 blk-mq-debugfs: A... |
646 |
__releases(&ctx->lock) |
950cd7e9f blk-mq: move hctx... |
647 648 649 650 651 652 653 654 655 656 657 658 |
{ struct blk_mq_ctx *ctx = m->private; spin_unlock(&ctx->lock); } static const struct seq_operations ctx_rq_list_seq_ops = { .start = ctx_rq_list_start, .next = ctx_rq_list_next, .stop = ctx_rq_list_stop, .show = blk_mq_debugfs_rq_show, }; |
f57de23ac blk-mq-debugfs: g... |
659 |
static int ctx_dispatched_show(void *data, struct seq_file *m) |
4a46f05eb blk-mq: move hctx... |
660 |
{ |
f57de23ac blk-mq-debugfs: g... |
661 |
struct blk_mq_ctx *ctx = data; |
4a46f05eb blk-mq: move hctx... |
662 663 664 665 666 |
seq_printf(m, "%lu %lu ", ctx->rq_dispatched[1], ctx->rq_dispatched[0]); return 0; } |
f57de23ac blk-mq-debugfs: g... |
667 |
static ssize_t ctx_dispatched_write(void *data, const char __user *buf, |
4a46f05eb blk-mq: move hctx... |
668 669 |
size_t count, loff_t *ppos) { |
f57de23ac blk-mq-debugfs: g... |
670 |
struct blk_mq_ctx *ctx = data; |
4a46f05eb blk-mq: move hctx... |
671 672 673 674 |
ctx->rq_dispatched[0] = ctx->rq_dispatched[1] = 0; return count; } |
f57de23ac blk-mq-debugfs: g... |
675 |
static int ctx_merged_show(void *data, struct seq_file *m) |
4a46f05eb blk-mq: move hctx... |
676 |
{ |
f57de23ac blk-mq-debugfs: g... |
677 |
struct blk_mq_ctx *ctx = data; |
4a46f05eb blk-mq: move hctx... |
678 679 680 681 682 |
seq_printf(m, "%lu ", ctx->rq_merged); return 0; } |
f57de23ac blk-mq-debugfs: g... |
683 684 |
static ssize_t ctx_merged_write(void *data, const char __user *buf, size_t count, loff_t *ppos) |
4a46f05eb blk-mq: move hctx... |
685 |
{ |
f57de23ac blk-mq-debugfs: g... |
686 |
struct blk_mq_ctx *ctx = data; |
4a46f05eb blk-mq: move hctx... |
687 688 689 690 |
ctx->rq_merged = 0; return count; } |
f57de23ac blk-mq-debugfs: g... |
691 |
static int ctx_completed_show(void *data, struct seq_file *m) |
4a46f05eb blk-mq: move hctx... |
692 |
{ |
f57de23ac blk-mq-debugfs: g... |
693 |
struct blk_mq_ctx *ctx = data; |
4a46f05eb blk-mq: move hctx... |
694 695 696 697 698 |
seq_printf(m, "%lu %lu ", ctx->rq_completed[1], ctx->rq_completed[0]); return 0; } |
f57de23ac blk-mq-debugfs: g... |
699 700 |
static ssize_t ctx_completed_write(void *data, const char __user *buf, size_t count, loff_t *ppos) |
4a46f05eb blk-mq: move hctx... |
701 |
{ |
f57de23ac blk-mq-debugfs: g... |
702 703 704 705 |
struct blk_mq_ctx *ctx = data; ctx->rq_completed[0] = ctx->rq_completed[1] = 0; return count; |
4a46f05eb blk-mq: move hctx... |
706 |
} |
f57de23ac blk-mq-debugfs: g... |
707 708 709 710 711 712 713 714 715 716 |
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... |
717 718 |
{ struct seq_file *m = file->private_data; |
f57de23ac blk-mq-debugfs: g... |
719 720 |
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... |
721 |
|
6b136a24b blk-mq-debugfs: d... |
722 723 724 725 726 |
/* * 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... |
727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 |
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... |
752 |
} |
f57de23ac blk-mq-debugfs: g... |
753 754 755 756 757 758 759 760 761 |
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); } |
f84659339 blk-mq-debugfs: D... |
762 |
static const struct file_operations blk_mq_debugfs_fops = { |
f57de23ac blk-mq-debugfs: g... |
763 |
.open = blk_mq_debugfs_open, |
4a46f05eb blk-mq: move hctx... |
764 |
.read = seq_read, |
f57de23ac blk-mq-debugfs: g... |
765 |
.write = blk_mq_debugfs_write, |
4a46f05eb blk-mq: move hctx... |
766 |
.llseek = seq_lseek, |
f57de23ac blk-mq-debugfs: g... |
767 |
.release = blk_mq_debugfs_release, |
4a46f05eb blk-mq: move hctx... |
768 |
}; |
07e4fead4 blk-mq: create de... |
769 |
static const struct blk_mq_debugfs_attr blk_mq_debugfs_hctx_attrs[] = { |
f57de23ac blk-mq-debugfs: g... |
770 771 772 |
{"state", 0400, hctx_state_show}, {"flags", 0400, hctx_flags_show}, {"dispatch", 0400, .seq_ops = &hctx_dispatch_seq_ops}, |
2720bab50 blk-mq-debugfs: S... |
773 |
{"busy", 0400, hctx_busy_show}, |
f57de23ac blk-mq-debugfs: g... |
774 775 776 777 778 779 780 781 782 783 |
{"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... |
784 |
{"dispatch_busy", 0400, hctx_dispatch_busy_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[] = { |
f57de23ac blk-mq-debugfs: g... |
789 790 791 792 |
{"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}, |
72f2f8f69 blk-mq-debug: Int... |
793 |
{}, |
07e4fead4 blk-mq: create de... |
794 |
}; |
9c1051aac blk-mq: untangle ... |
795 796 797 798 799 800 801 802 803 804 805 806 |
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; } |
4c9e4019f blk-mq: Let blk_m... |
807 |
int blk_mq_debugfs_register(struct request_queue *q) |
07e4fead4 blk-mq: create de... |
808 |
{ |
9c1051aac blk-mq: untangle ... |
809 810 |
struct blk_mq_hw_ctx *hctx; int i; |
18fbda91c block: use same b... |
811 |
if (!blk_debugfs_root) |
07e4fead4 blk-mq: create de... |
812 |
return -ENOENT; |
4c9e4019f blk-mq: Let blk_m... |
813 814 |
q->debugfs_dir = debugfs_create_dir(kobject_name(q->kobj.parent), blk_debugfs_root); |
07e4fead4 blk-mq: create de... |
815 |
if (!q->debugfs_dir) |
9c1051aac blk-mq: untangle ... |
816 |
return -ENOMEM; |
07e4fead4 blk-mq: create de... |
817 |
|
9c1051aac blk-mq: untangle ... |
818 819 |
if (!debugfs_create_files(q->debugfs_dir, q, blk_mq_debugfs_queue_attrs)) |
07e4fead4 blk-mq: create de... |
820 |
goto err; |
9c1051aac blk-mq: untangle ... |
821 |
/* |
70e62f4ba blk-mq-debugfs: f... |
822 |
* blk_mq_init_sched() attempted to do this already, but q->debugfs_dir |
9c1051aac blk-mq: untangle ... |
823 824 825 |
* 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... |
826 827 828 829 |
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 ... |
830 831 832 |
queue_for_each_hw_ctx(q, hctx, i) { if (!hctx->debugfs_dir && blk_mq_debugfs_register_hctx(q, hctx)) goto err; |
d332ce091 blk-mq-debugfs: a... |
833 834 835 |
if (q->elevator && !hctx->sched_debugfs_dir && blk_mq_debugfs_register_sched_hctx(q, hctx)) goto err; |
9c1051aac blk-mq: untangle ... |
836 |
} |
07e4fead4 blk-mq: create de... |
837 838 839 840 841 842 843 844 845 846 |
return 0; err: blk_mq_debugfs_unregister(q); return -ENOMEM; } void blk_mq_debugfs_unregister(struct request_queue *q) { debugfs_remove_recursive(q->debugfs_dir); |
d332ce091 blk-mq-debugfs: a... |
847 |
q->sched_debugfs_dir = NULL; |
07e4fead4 blk-mq: create de... |
848 849 |
q->debugfs_dir = NULL; } |
9c1051aac blk-mq: untangle ... |
850 851 |
static int blk_mq_debugfs_register_ctx(struct blk_mq_hw_ctx *hctx, struct blk_mq_ctx *ctx) |
07e4fead4 blk-mq: create de... |
852 853 854 |
{ struct dentry *ctx_dir; char name[20]; |
07e4fead4 blk-mq: create de... |
855 856 |
snprintf(name, sizeof(name), "cpu%u", ctx->cpu); |
9c1051aac blk-mq: untangle ... |
857 |
ctx_dir = debugfs_create_dir(name, hctx->debugfs_dir); |
07e4fead4 blk-mq: create de... |
858 859 |
if (!ctx_dir) return -ENOMEM; |
72f2f8f69 blk-mq-debug: Int... |
860 861 |
if (!debugfs_create_files(ctx_dir, ctx, blk_mq_debugfs_ctx_attrs)) return -ENOMEM; |
07e4fead4 blk-mq: create de... |
862 863 864 |
return 0; } |
9c1051aac blk-mq: untangle ... |
865 866 |
int 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; |
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if (!q->debugfs_dir) return -ENOENT; |
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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); if (!hctx->debugfs_dir) |
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return -ENOMEM; |
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if (!debugfs_create_files(hctx->debugfs_dir, hctx, blk_mq_debugfs_hctx_attrs)) goto err; |
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hctx_for_each_ctx(hctx, ctx, i) { |
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if (blk_mq_debugfs_register_ctx(hctx, ctx)) goto err; |
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} return 0; |
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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); |
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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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int 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) { if (blk_mq_debugfs_register_hctx(q, hctx)) |
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return -ENOMEM; |
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} return 0; |
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} |
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void blk_mq_debugfs_unregister_hctxs(struct request_queue *q) |
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911 |
{ |
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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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int blk_mq_debugfs_register_sched(struct request_queue *q) { struct elevator_type *e = q->elevator->type; if (!q->debugfs_dir) return -ENOENT; if (!e->queue_debugfs_attrs) return 0; q->sched_debugfs_dir = debugfs_create_dir("sched", q->debugfs_dir); if (!q->sched_debugfs_dir) return -ENOMEM; if (!debugfs_create_files(q->sched_debugfs_dir, q, e->queue_debugfs_attrs)) goto err; return 0; err: blk_mq_debugfs_unregister_sched(q); return -ENOMEM; } 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(hctx->sched_debugfs_dir); hctx->sched_debugfs_dir = NULL; } |