Christoph Hellwig | 8c16567 | 2019-04-30 14:42:39 -0400 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
Omar Sandoval | 07e4fea | 2017-01-25 08:06:40 -0800 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (C) 2017 Facebook |
Omar Sandoval | 07e4fea | 2017-01-25 08:06:40 -0800 | [diff] [blame] | 4 | */ |
| 5 | |
| 6 | #include <linux/kernel.h> |
| 7 | #include <linux/blkdev.h> |
| 8 | #include <linux/debugfs.h> |
| 9 | |
Omar Sandoval | 18fbda9 | 2017-01-31 14:53:20 -0800 | [diff] [blame] | 10 | #include "blk.h" |
Omar Sandoval | 07e4fea | 2017-01-25 08:06:40 -0800 | [diff] [blame] | 11 | #include "blk-mq.h" |
Omar Sandoval | d173a25 | 2017-05-04 00:31:30 -0700 | [diff] [blame] | 12 | #include "blk-mq-debugfs.h" |
Christoph Hellwig | 2aa7745 | 2021-11-23 19:53:08 +0100 | [diff] [blame] | 13 | #include "blk-mq-sched.h" |
Ming Lei | cc56694 | 2018-12-17 09:46:00 +0800 | [diff] [blame] | 14 | #include "blk-rq-qos.h" |
Omar Sandoval | 07e4fea | 2017-01-25 08:06:40 -0800 | [diff] [blame] | 15 | |
Bart Van Assche | 1209cb7 | 2018-02-27 16:32:13 -0800 | [diff] [blame] | 16 | static int queue_poll_stat_show(void *data, struct seq_file *m) |
| 17 | { |
Bart Van Assche | 1209cb7 | 2018-02-27 16:32:13 -0800 | [diff] [blame] | 18 | return 0; |
| 19 | } |
| 20 | |
| 21 | static void *queue_requeue_list_start(struct seq_file *m, loff_t *pos) |
| 22 | __acquires(&q->requeue_lock) |
| 23 | { |
| 24 | struct request_queue *q = m->private; |
| 25 | |
| 26 | spin_lock_irq(&q->requeue_lock); |
| 27 | return seq_list_start(&q->requeue_list, *pos); |
| 28 | } |
| 29 | |
| 30 | static void *queue_requeue_list_next(struct seq_file *m, void *v, loff_t *pos) |
| 31 | { |
| 32 | struct request_queue *q = m->private; |
| 33 | |
| 34 | return seq_list_next(v, &q->requeue_list, pos); |
| 35 | } |
| 36 | |
| 37 | static void queue_requeue_list_stop(struct seq_file *m, void *v) |
| 38 | __releases(&q->requeue_lock) |
| 39 | { |
| 40 | struct request_queue *q = m->private; |
| 41 | |
| 42 | spin_unlock_irq(&q->requeue_lock); |
| 43 | } |
| 44 | |
| 45 | static const struct seq_operations queue_requeue_list_seq_ops = { |
| 46 | .start = queue_requeue_list_start, |
| 47 | .next = queue_requeue_list_next, |
| 48 | .stop = queue_requeue_list_stop, |
| 49 | .show = blk_mq_debugfs_rq_show, |
| 50 | }; |
| 51 | |
Bart Van Assche | 91d6890 | 2017-04-10 16:13:15 -0600 | [diff] [blame] | 52 | static int blk_flags_show(struct seq_file *m, const unsigned long flags, |
| 53 | const char *const *flag_name, int flag_name_count) |
| 54 | { |
| 55 | bool sep = false; |
| 56 | int i; |
| 57 | |
| 58 | for (i = 0; i < sizeof(flags) * BITS_PER_BYTE; i++) { |
| 59 | if (!(flags & BIT(i))) |
| 60 | continue; |
| 61 | if (sep) |
Omar Sandoval | bec03d6 | 2017-05-04 00:31:23 -0700 | [diff] [blame] | 62 | seq_puts(m, "|"); |
Bart Van Assche | 91d6890 | 2017-04-10 16:13:15 -0600 | [diff] [blame] | 63 | sep = true; |
| 64 | if (i < flag_name_count && flag_name[i]) |
| 65 | seq_puts(m, flag_name[i]); |
| 66 | else |
| 67 | seq_printf(m, "%d", i); |
| 68 | } |
Bart Van Assche | 91d6890 | 2017-04-10 16:13:15 -0600 | [diff] [blame] | 69 | return 0; |
| 70 | } |
| 71 | |
Bart Van Assche | cd84a62 | 2018-09-26 14:01:04 -0700 | [diff] [blame] | 72 | static int queue_pm_only_show(void *data, struct seq_file *m) |
| 73 | { |
| 74 | struct request_queue *q = data; |
| 75 | |
| 76 | seq_printf(m, "%d\n", atomic_read(&q->pm_only)); |
| 77 | return 0; |
| 78 | } |
| 79 | |
Omar Sandoval | 1a43511 | 2017-05-04 00:31:24 -0700 | [diff] [blame] | 80 | #define QUEUE_FLAG_NAME(name) [QUEUE_FLAG_##name] = #name |
Bart Van Assche | 91d6890 | 2017-04-10 16:13:15 -0600 | [diff] [blame] | 81 | static const char *const blk_queue_flag_name[] = { |
Omar Sandoval | 1a43511 | 2017-05-04 00:31:24 -0700 | [diff] [blame] | 82 | QUEUE_FLAG_NAME(STOPPED), |
Omar Sandoval | 1a43511 | 2017-05-04 00:31:24 -0700 | [diff] [blame] | 83 | QUEUE_FLAG_NAME(DYING), |
Omar Sandoval | 1a43511 | 2017-05-04 00:31:24 -0700 | [diff] [blame] | 84 | QUEUE_FLAG_NAME(NOMERGES), |
| 85 | QUEUE_FLAG_NAME(SAME_COMP), |
| 86 | QUEUE_FLAG_NAME(FAIL_IO), |
Omar Sandoval | 1a43511 | 2017-05-04 00:31:24 -0700 | [diff] [blame] | 87 | QUEUE_FLAG_NAME(NOXMERGES), |
Omar Sandoval | 1a43511 | 2017-05-04 00:31:24 -0700 | [diff] [blame] | 88 | QUEUE_FLAG_NAME(SAME_FORCE), |
Omar Sandoval | 1a43511 | 2017-05-04 00:31:24 -0700 | [diff] [blame] | 89 | QUEUE_FLAG_NAME(INIT_DONE), |
Omar Sandoval | 1a43511 | 2017-05-04 00:31:24 -0700 | [diff] [blame] | 90 | QUEUE_FLAG_NAME(STATS), |
Omar Sandoval | 1a43511 | 2017-05-04 00:31:24 -0700 | [diff] [blame] | 91 | QUEUE_FLAG_NAME(REGISTERED), |
Bart Van Assche | 22d5382 | 2017-08-18 15:52:54 -0700 | [diff] [blame] | 92 | QUEUE_FLAG_NAME(QUIESCED), |
Hou Tao | bfe373f | 2020-04-28 09:54:56 +0800 | [diff] [blame] | 93 | QUEUE_FLAG_NAME(RQ_ALLOC_TIME), |
Johannes Thumshirn | 1dbdd99 | 2021-10-04 16:22:07 +0900 | [diff] [blame] | 94 | QUEUE_FLAG_NAME(HCTX_ACTIVE), |
Bart Van Assche | d5fb872 | 2023-05-18 15:27:08 -0700 | [diff] [blame] | 95 | QUEUE_FLAG_NAME(SQ_SCHED), |
Bart Van Assche | 91d6890 | 2017-04-10 16:13:15 -0600 | [diff] [blame] | 96 | }; |
Omar Sandoval | 1a43511 | 2017-05-04 00:31:24 -0700 | [diff] [blame] | 97 | #undef QUEUE_FLAG_NAME |
Bart Van Assche | 91d6890 | 2017-04-10 16:13:15 -0600 | [diff] [blame] | 98 | |
Omar Sandoval | f57de23 | 2017-05-04 00:31:28 -0700 | [diff] [blame] | 99 | static int queue_state_show(void *data, struct seq_file *m) |
Bart Van Assche | 91d6890 | 2017-04-10 16:13:15 -0600 | [diff] [blame] | 100 | { |
Omar Sandoval | f57de23 | 2017-05-04 00:31:28 -0700 | [diff] [blame] | 101 | struct request_queue *q = data; |
Bart Van Assche | 91d6890 | 2017-04-10 16:13:15 -0600 | [diff] [blame] | 102 | |
| 103 | blk_flags_show(m, q->queue_flags, blk_queue_flag_name, |
| 104 | ARRAY_SIZE(blk_queue_flag_name)); |
Bart Van Assche | fd07dc8 | 2017-04-26 13:47:54 -0700 | [diff] [blame] | 105 | seq_puts(m, "\n"); |
Bart Van Assche | 91d6890 | 2017-04-10 16:13:15 -0600 | [diff] [blame] | 106 | return 0; |
| 107 | } |
| 108 | |
Omar Sandoval | f57de23 | 2017-05-04 00:31:28 -0700 | [diff] [blame] | 109 | static ssize_t queue_state_write(void *data, const char __user *buf, |
| 110 | size_t count, loff_t *ppos) |
Bart Van Assche | 91d6890 | 2017-04-10 16:13:15 -0600 | [diff] [blame] | 111 | { |
Omar Sandoval | f57de23 | 2017-05-04 00:31:28 -0700 | [diff] [blame] | 112 | struct request_queue *q = data; |
Omar Sandoval | 71b9051 | 2017-05-04 00:31:26 -0700 | [diff] [blame] | 113 | char opbuf[16] = { }, *op; |
Bart Van Assche | 91d6890 | 2017-04-10 16:13:15 -0600 | [diff] [blame] | 114 | |
Bart Van Assche | 18d4d7d | 2017-05-04 00:31:29 -0700 | [diff] [blame] | 115 | /* |
Christoph Hellwig | 1f90307 | 2022-06-19 08:05:49 +0200 | [diff] [blame] | 116 | * The "state" attribute is removed when the queue is removed. Don't |
| 117 | * allow setting the state on a dying queue to avoid a use-after-free. |
Bart Van Assche | 18d4d7d | 2017-05-04 00:31:29 -0700 | [diff] [blame] | 118 | */ |
Christoph Hellwig | 1f90307 | 2022-06-19 08:05:49 +0200 | [diff] [blame] | 119 | if (blk_queue_dying(q)) |
Bart Van Assche | 18d4d7d | 2017-05-04 00:31:29 -0700 | [diff] [blame] | 120 | return -ENOENT; |
| 121 | |
Omar Sandoval | 71b9051 | 2017-05-04 00:31:26 -0700 | [diff] [blame] | 122 | if (count >= sizeof(opbuf)) { |
Omar Sandoval | c7e4145 | 2017-05-04 00:31:25 -0700 | [diff] [blame] | 123 | pr_err("%s: operation too long\n", __func__); |
| 124 | goto inval; |
| 125 | } |
| 126 | |
Omar Sandoval | 71b9051 | 2017-05-04 00:31:26 -0700 | [diff] [blame] | 127 | if (copy_from_user(opbuf, buf, count)) |
Bart Van Assche | 91d6890 | 2017-04-10 16:13:15 -0600 | [diff] [blame] | 128 | return -EFAULT; |
Omar Sandoval | 71b9051 | 2017-05-04 00:31:26 -0700 | [diff] [blame] | 129 | op = strstrip(opbuf); |
Bart Van Assche | 91d6890 | 2017-04-10 16:13:15 -0600 | [diff] [blame] | 130 | if (strcmp(op, "run") == 0) { |
| 131 | blk_mq_run_hw_queues(q, true); |
| 132 | } else if (strcmp(op, "start") == 0) { |
| 133 | blk_mq_start_stopped_hw_queues(q, true); |
Bart Van Assche | edea55a | 2017-06-01 08:55:13 -0700 | [diff] [blame] | 134 | } else if (strcmp(op, "kick") == 0) { |
| 135 | blk_mq_kick_requeue_list(q); |
Bart Van Assche | 91d6890 | 2017-04-10 16:13:15 -0600 | [diff] [blame] | 136 | } else { |
Omar Sandoval | c7e4145 | 2017-05-04 00:31:25 -0700 | [diff] [blame] | 137 | pr_err("%s: unsupported operation '%s'\n", __func__, op); |
| 138 | inval: |
Bart Van Assche | edea55a | 2017-06-01 08:55:13 -0700 | [diff] [blame] | 139 | pr_err("%s: use 'run', 'start' or 'kick'\n", __func__); |
Bart Van Assche | 91d6890 | 2017-04-10 16:13:15 -0600 | [diff] [blame] | 140 | return -EINVAL; |
| 141 | } |
Omar Sandoval | c7e4145 | 2017-05-04 00:31:25 -0700 | [diff] [blame] | 142 | return count; |
Bart Van Assche | 91d6890 | 2017-04-10 16:13:15 -0600 | [diff] [blame] | 143 | } |
| 144 | |
Bart Van Assche | 1209cb7 | 2018-02-27 16:32:13 -0800 | [diff] [blame] | 145 | static const struct blk_mq_debugfs_attr blk_mq_debugfs_queue_attrs[] = { |
| 146 | { "poll_stat", 0400, queue_poll_stat_show }, |
| 147 | { "requeue_list", 0400, .seq_ops = &queue_requeue_list_seq_ops }, |
Bart Van Assche | cd84a62 | 2018-09-26 14:01:04 -0700 | [diff] [blame] | 148 | { "pm_only", 0600, queue_pm_only_show, NULL }, |
Bart Van Assche | 1209cb7 | 2018-02-27 16:32:13 -0800 | [diff] [blame] | 149 | { "state", 0600, queue_state_show, queue_state_write }, |
Damien Le Moal | a98b05b | 2024-04-08 10:41:25 +0900 | [diff] [blame] | 150 | { "zone_wplugs", 0400, queue_zone_wplugs_show, NULL }, |
Bart Van Assche | 1209cb7 | 2018-02-27 16:32:13 -0800 | [diff] [blame] | 151 | { }, |
| 152 | }; |
Omar Sandoval | 34dbad5 | 2017-03-21 08:56:08 -0700 | [diff] [blame] | 153 | |
Omar Sandoval | 1a43511 | 2017-05-04 00:31:24 -0700 | [diff] [blame] | 154 | #define HCTX_STATE_NAME(name) [BLK_MQ_S_##name] = #name |
Bart Van Assche | f5c0b091 | 2017-03-30 11:21:27 -0700 | [diff] [blame] | 155 | static const char *const hctx_state_name[] = { |
Omar Sandoval | 1a43511 | 2017-05-04 00:31:24 -0700 | [diff] [blame] | 156 | HCTX_STATE_NAME(STOPPED), |
| 157 | HCTX_STATE_NAME(TAG_ACTIVE), |
| 158 | HCTX_STATE_NAME(SCHED_RESTART), |
Ming Lei | bf0beec | 2020-05-29 15:53:15 +0200 | [diff] [blame] | 159 | HCTX_STATE_NAME(INACTIVE), |
Bart Van Assche | f5c0b091 | 2017-03-30 11:21:27 -0700 | [diff] [blame] | 160 | }; |
Omar Sandoval | 1a43511 | 2017-05-04 00:31:24 -0700 | [diff] [blame] | 161 | #undef HCTX_STATE_NAME |
| 162 | |
Omar Sandoval | f57de23 | 2017-05-04 00:31:28 -0700 | [diff] [blame] | 163 | static int hctx_state_show(void *data, struct seq_file *m) |
Omar Sandoval | 9abb2ad | 2017-01-25 08:06:41 -0800 | [diff] [blame] | 164 | { |
Omar Sandoval | f57de23 | 2017-05-04 00:31:28 -0700 | [diff] [blame] | 165 | struct blk_mq_hw_ctx *hctx = data; |
Omar Sandoval | 9abb2ad | 2017-01-25 08:06:41 -0800 | [diff] [blame] | 166 | |
Bart Van Assche | f5c0b091 | 2017-03-30 11:21:27 -0700 | [diff] [blame] | 167 | blk_flags_show(m, hctx->state, hctx_state_name, |
| 168 | ARRAY_SIZE(hctx_state_name)); |
Bart Van Assche | fd07dc8 | 2017-04-26 13:47:54 -0700 | [diff] [blame] | 169 | seq_puts(m, "\n"); |
Omar Sandoval | 9abb2ad | 2017-01-25 08:06:41 -0800 | [diff] [blame] | 170 | return 0; |
| 171 | } |
| 172 | |
Omar Sandoval | 1a43511 | 2017-05-04 00:31:24 -0700 | [diff] [blame] | 173 | #define BLK_TAG_ALLOC_NAME(name) [BLK_TAG_ALLOC_##name] = #name |
Bart Van Assche | f5c0b091 | 2017-03-30 11:21:27 -0700 | [diff] [blame] | 174 | static const char *const alloc_policy_name[] = { |
Omar Sandoval | 1a43511 | 2017-05-04 00:31:24 -0700 | [diff] [blame] | 175 | BLK_TAG_ALLOC_NAME(FIFO), |
| 176 | BLK_TAG_ALLOC_NAME(RR), |
Bart Van Assche | f5c0b091 | 2017-03-30 11:21:27 -0700 | [diff] [blame] | 177 | }; |
Omar Sandoval | 1a43511 | 2017-05-04 00:31:24 -0700 | [diff] [blame] | 178 | #undef BLK_TAG_ALLOC_NAME |
Bart Van Assche | f5c0b091 | 2017-03-30 11:21:27 -0700 | [diff] [blame] | 179 | |
Omar Sandoval | 1a43511 | 2017-05-04 00:31:24 -0700 | [diff] [blame] | 180 | #define HCTX_FLAG_NAME(name) [ilog2(BLK_MQ_F_##name)] = #name |
Bart Van Assche | f5c0b091 | 2017-03-30 11:21:27 -0700 | [diff] [blame] | 181 | static const char *const hctx_flag_name[] = { |
Omar Sandoval | 1a43511 | 2017-05-04 00:31:24 -0700 | [diff] [blame] | 182 | HCTX_FLAG_NAME(SHOULD_MERGE), |
Ming Lei | 51db1c3 | 2020-08-19 23:20:19 +0800 | [diff] [blame] | 183 | HCTX_FLAG_NAME(TAG_QUEUE_SHARED), |
Omar Sandoval | 1a43511 | 2017-05-04 00:31:24 -0700 | [diff] [blame] | 184 | HCTX_FLAG_NAME(BLOCKING), |
| 185 | HCTX_FLAG_NAME(NO_SCHED), |
Ming Lei | bf0beec | 2020-05-29 15:53:15 +0200 | [diff] [blame] | 186 | HCTX_FLAG_NAME(STACKING), |
John Garry | 02f938e | 2021-01-08 16:55:37 +0800 | [diff] [blame] | 187 | HCTX_FLAG_NAME(TAG_HCTX_SHARED), |
Bart Van Assche | f5c0b091 | 2017-03-30 11:21:27 -0700 | [diff] [blame] | 188 | }; |
Omar Sandoval | 1a43511 | 2017-05-04 00:31:24 -0700 | [diff] [blame] | 189 | #undef HCTX_FLAG_NAME |
Bart Van Assche | f5c0b091 | 2017-03-30 11:21:27 -0700 | [diff] [blame] | 190 | |
Omar Sandoval | f57de23 | 2017-05-04 00:31:28 -0700 | [diff] [blame] | 191 | static int hctx_flags_show(void *data, struct seq_file *m) |
Omar Sandoval | 9abb2ad | 2017-01-25 08:06:41 -0800 | [diff] [blame] | 192 | { |
Omar Sandoval | f57de23 | 2017-05-04 00:31:28 -0700 | [diff] [blame] | 193 | struct blk_mq_hw_ctx *hctx = data; |
Bart Van Assche | f5c0b091 | 2017-03-30 11:21:27 -0700 | [diff] [blame] | 194 | const int alloc_policy = BLK_MQ_FLAG_TO_ALLOC_POLICY(hctx->flags); |
Omar Sandoval | 9abb2ad | 2017-01-25 08:06:41 -0800 | [diff] [blame] | 195 | |
Bart Van Assche | f5c0b091 | 2017-03-30 11:21:27 -0700 | [diff] [blame] | 196 | seq_puts(m, "alloc_policy="); |
| 197 | if (alloc_policy < ARRAY_SIZE(alloc_policy_name) && |
| 198 | alloc_policy_name[alloc_policy]) |
| 199 | seq_puts(m, alloc_policy_name[alloc_policy]); |
| 200 | else |
| 201 | seq_printf(m, "%d", alloc_policy); |
| 202 | seq_puts(m, " "); |
| 203 | blk_flags_show(m, |
| 204 | hctx->flags ^ BLK_ALLOC_POLICY_TO_MQ_FLAG(alloc_policy), |
| 205 | hctx_flag_name, ARRAY_SIZE(hctx_flag_name)); |
Bart Van Assche | fd07dc8 | 2017-04-26 13:47:54 -0700 | [diff] [blame] | 206 | seq_puts(m, "\n"); |
Omar Sandoval | 9abb2ad | 2017-01-25 08:06:41 -0800 | [diff] [blame] | 207 | return 0; |
| 208 | } |
| 209 | |
Omar Sandoval | 1a43511 | 2017-05-04 00:31:24 -0700 | [diff] [blame] | 210 | #define CMD_FLAG_NAME(name) [__REQ_##name] = #name |
Bart Van Assche | 8658dca | 2017-04-26 13:47:55 -0700 | [diff] [blame] | 211 | static const char *const cmd_flag_name[] = { |
Omar Sandoval | 1a43511 | 2017-05-04 00:31:24 -0700 | [diff] [blame] | 212 | CMD_FLAG_NAME(FAILFAST_DEV), |
| 213 | CMD_FLAG_NAME(FAILFAST_TRANSPORT), |
| 214 | CMD_FLAG_NAME(FAILFAST_DRIVER), |
| 215 | CMD_FLAG_NAME(SYNC), |
| 216 | CMD_FLAG_NAME(META), |
| 217 | CMD_FLAG_NAME(PRIO), |
| 218 | CMD_FLAG_NAME(NOMERGE), |
| 219 | CMD_FLAG_NAME(IDLE), |
| 220 | CMD_FLAG_NAME(INTEGRITY), |
| 221 | CMD_FLAG_NAME(FUA), |
| 222 | CMD_FLAG_NAME(PREFLUSH), |
| 223 | CMD_FLAG_NAME(RAHEAD), |
| 224 | CMD_FLAG_NAME(BACKGROUND), |
Bart Van Assche | 22d5382 | 2017-08-18 15:52:54 -0700 | [diff] [blame] | 225 | CMD_FLAG_NAME(NOWAIT), |
Jianchao Wang | 1c26010 | 2019-01-24 18:28:55 +0800 | [diff] [blame] | 226 | CMD_FLAG_NAME(NOUNMAP), |
Christoph Hellwig | 6ce913f | 2021-10-12 13:12:21 +0200 | [diff] [blame] | 227 | CMD_FLAG_NAME(POLLED), |
Bart Van Assche | 8658dca | 2017-04-26 13:47:55 -0700 | [diff] [blame] | 228 | }; |
Omar Sandoval | 1a43511 | 2017-05-04 00:31:24 -0700 | [diff] [blame] | 229 | #undef CMD_FLAG_NAME |
Bart Van Assche | 8658dca | 2017-04-26 13:47:55 -0700 | [diff] [blame] | 230 | |
Omar Sandoval | 1a43511 | 2017-05-04 00:31:24 -0700 | [diff] [blame] | 231 | #define RQF_NAME(name) [ilog2((__force u32)RQF_##name)] = #name |
Bart Van Assche | 8658dca | 2017-04-26 13:47:55 -0700 | [diff] [blame] | 232 | static const char *const rqf_name[] = { |
Jens Axboe | 85ba3ef | 2018-01-12 14:47:57 -0700 | [diff] [blame] | 233 | RQF_NAME(STARTED), |
Omar Sandoval | 1a43511 | 2017-05-04 00:31:24 -0700 | [diff] [blame] | 234 | RQF_NAME(FLUSH_SEQ), |
| 235 | RQF_NAME(MIXED_MERGE), |
Omar Sandoval | 1a43511 | 2017-05-04 00:31:24 -0700 | [diff] [blame] | 236 | RQF_NAME(DONTPREP), |
Christoph Hellwig | dd6216b | 2023-05-18 07:31:01 +0200 | [diff] [blame] | 237 | RQF_NAME(SCHED_TAGS), |
| 238 | RQF_NAME(USE_SCHED), |
Omar Sandoval | 1a43511 | 2017-05-04 00:31:24 -0700 | [diff] [blame] | 239 | RQF_NAME(FAILED), |
| 240 | RQF_NAME(QUIET), |
Omar Sandoval | 1a43511 | 2017-05-04 00:31:24 -0700 | [diff] [blame] | 241 | RQF_NAME(IO_STAT), |
Omar Sandoval | 1a43511 | 2017-05-04 00:31:24 -0700 | [diff] [blame] | 242 | RQF_NAME(PM), |
| 243 | RQF_NAME(HASHED), |
| 244 | RQF_NAME(STATS), |
| 245 | RQF_NAME(SPECIAL_PAYLOAD), |
Jens Axboe | 745ed37 | 2022-09-08 17:26:59 -0600 | [diff] [blame] | 246 | RQF_NAME(TIMED_OUT), |
Jens Axboe | 745ed37 | 2022-09-08 17:26:59 -0600 | [diff] [blame] | 247 | RQF_NAME(RESV), |
Bart Van Assche | 8658dca | 2017-04-26 13:47:55 -0700 | [diff] [blame] | 248 | }; |
Omar Sandoval | 1a43511 | 2017-05-04 00:31:24 -0700 | [diff] [blame] | 249 | #undef RQF_NAME |
Bart Van Assche | 8658dca | 2017-04-26 13:47:55 -0700 | [diff] [blame] | 250 | |
Bart Van Assche | ec6dcf6 | 2018-03-16 10:31:11 -0700 | [diff] [blame] | 251 | static const char *const blk_mq_rq_state_name_array[] = { |
| 252 | [MQ_RQ_IDLE] = "idle", |
| 253 | [MQ_RQ_IN_FLIGHT] = "in_flight", |
| 254 | [MQ_RQ_COMPLETE] = "complete", |
| 255 | }; |
| 256 | |
| 257 | static const char *blk_mq_rq_state_name(enum mq_rq_state rq_state) |
| 258 | { |
Dan Carpenter | a1e7918 | 2018-06-20 13:45:05 +0300 | [diff] [blame] | 259 | if (WARN_ON_ONCE((unsigned int)rq_state >= |
Bart Van Assche | ec6dcf6 | 2018-03-16 10:31:11 -0700 | [diff] [blame] | 260 | ARRAY_SIZE(blk_mq_rq_state_name_array))) |
| 261 | return "(?)"; |
| 262 | return blk_mq_rq_state_name_array[rq_state]; |
| 263 | } |
| 264 | |
Omar Sandoval | daaadb3 | 2017-05-04 00:31:34 -0700 | [diff] [blame] | 265 | int __blk_mq_debugfs_rq_show(struct seq_file *m, struct request *rq) |
Omar Sandoval | 950cd7e | 2017-01-25 08:06:42 -0800 | [diff] [blame] | 266 | { |
Bart Van Assche | 2836ee4 | 2017-04-26 13:47:56 -0700 | [diff] [blame] | 267 | const struct blk_mq_ops *const mq_ops = rq->q->mq_ops; |
Bart Van Assche | 77e7ffd | 2022-07-14 11:06:28 -0700 | [diff] [blame] | 268 | const enum req_op op = req_op(rq); |
Chaitanya Kulkarni | 874c893 | 2019-06-20 10:59:17 -0700 | [diff] [blame] | 269 | const char *op_str = blk_op_str(op); |
Omar Sandoval | 950cd7e | 2017-01-25 08:06:42 -0800 | [diff] [blame] | 270 | |
Bart Van Assche | 8658dca | 2017-04-26 13:47:55 -0700 | [diff] [blame] | 271 | seq_printf(m, "%p {.op=", rq); |
Chaitanya Kulkarni | 874c893 | 2019-06-20 10:59:17 -0700 | [diff] [blame] | 272 | if (strcmp(op_str, "UNKNOWN") == 0) |
Chaitanya Kulkarni | 3f6d385 | 2019-06-19 15:01:49 -0700 | [diff] [blame] | 273 | seq_printf(m, "%u", op); |
Bart Van Assche | 8658dca | 2017-04-26 13:47:55 -0700 | [diff] [blame] | 274 | else |
Chaitanya Kulkarni | 874c893 | 2019-06-20 10:59:17 -0700 | [diff] [blame] | 275 | seq_printf(m, "%s", op_str); |
Bart Van Assche | 8658dca | 2017-04-26 13:47:55 -0700 | [diff] [blame] | 276 | seq_puts(m, ", .cmd_flags="); |
Bart Van Assche | 16458cf | 2022-07-14 11:06:32 -0700 | [diff] [blame] | 277 | blk_flags_show(m, (__force unsigned int)(rq->cmd_flags & ~REQ_OP_MASK), |
| 278 | cmd_flag_name, ARRAY_SIZE(cmd_flag_name)); |
Bart Van Assche | 8658dca | 2017-04-26 13:47:55 -0700 | [diff] [blame] | 279 | seq_puts(m, ", .rq_flags="); |
| 280 | blk_flags_show(m, (__force unsigned int)rq->rq_flags, rqf_name, |
| 281 | ARRAY_SIZE(rqf_name)); |
Bart Van Assche | ec6dcf6 | 2018-03-16 10:31:11 -0700 | [diff] [blame] | 282 | seq_printf(m, ", .state=%s", blk_mq_rq_state_name(blk_mq_rq_state(rq))); |
Bart Van Assche | 2836ee4 | 2017-04-26 13:47:56 -0700 | [diff] [blame] | 283 | seq_printf(m, ", .tag=%d, .internal_tag=%d", rq->tag, |
Bart Van Assche | 8658dca | 2017-04-26 13:47:55 -0700 | [diff] [blame] | 284 | rq->internal_tag); |
Bart Van Assche | 2836ee4 | 2017-04-26 13:47:56 -0700 | [diff] [blame] | 285 | if (mq_ops->show_rq) |
| 286 | mq_ops->show_rq(m, rq); |
| 287 | seq_puts(m, "}\n"); |
Omar Sandoval | 950cd7e | 2017-01-25 08:06:42 -0800 | [diff] [blame] | 288 | return 0; |
| 289 | } |
Omar Sandoval | daaadb3 | 2017-05-04 00:31:34 -0700 | [diff] [blame] | 290 | EXPORT_SYMBOL_GPL(__blk_mq_debugfs_rq_show); |
| 291 | |
| 292 | int blk_mq_debugfs_rq_show(struct seq_file *m, void *v) |
| 293 | { |
| 294 | return __blk_mq_debugfs_rq_show(m, list_entry_rq(v)); |
| 295 | } |
Omar Sandoval | 16b738f | 2017-05-04 00:31:33 -0700 | [diff] [blame] | 296 | EXPORT_SYMBOL_GPL(blk_mq_debugfs_rq_show); |
Omar Sandoval | 950cd7e | 2017-01-25 08:06:42 -0800 | [diff] [blame] | 297 | |
| 298 | static void *hctx_dispatch_start(struct seq_file *m, loff_t *pos) |
Bart Van Assche | f3bcb0e | 2017-02-01 10:20:56 -0800 | [diff] [blame] | 299 | __acquires(&hctx->lock) |
Omar Sandoval | 950cd7e | 2017-01-25 08:06:42 -0800 | [diff] [blame] | 300 | { |
| 301 | struct blk_mq_hw_ctx *hctx = m->private; |
| 302 | |
| 303 | spin_lock(&hctx->lock); |
| 304 | return seq_list_start(&hctx->dispatch, *pos); |
| 305 | } |
| 306 | |
| 307 | static void *hctx_dispatch_next(struct seq_file *m, void *v, loff_t *pos) |
| 308 | { |
| 309 | struct blk_mq_hw_ctx *hctx = m->private; |
| 310 | |
| 311 | return seq_list_next(v, &hctx->dispatch, pos); |
| 312 | } |
| 313 | |
| 314 | static void hctx_dispatch_stop(struct seq_file *m, void *v) |
Bart Van Assche | f3bcb0e | 2017-02-01 10:20:56 -0800 | [diff] [blame] | 315 | __releases(&hctx->lock) |
Omar Sandoval | 950cd7e | 2017-01-25 08:06:42 -0800 | [diff] [blame] | 316 | { |
| 317 | struct blk_mq_hw_ctx *hctx = m->private; |
| 318 | |
| 319 | spin_unlock(&hctx->lock); |
| 320 | } |
| 321 | |
| 322 | static const struct seq_operations hctx_dispatch_seq_ops = { |
| 323 | .start = hctx_dispatch_start, |
| 324 | .next = hctx_dispatch_next, |
| 325 | .stop = hctx_dispatch_stop, |
| 326 | .show = blk_mq_debugfs_rq_show, |
| 327 | }; |
| 328 | |
Bart Van Assche | 2720bab | 2017-06-01 08:55:12 -0700 | [diff] [blame] | 329 | struct show_busy_params { |
| 330 | struct seq_file *m; |
| 331 | struct blk_mq_hw_ctx *hctx; |
| 332 | }; |
| 333 | |
| 334 | /* |
| 335 | * Note: the state of a request may change while this function is in progress, |
Jens Axboe | 7baa857 | 2018-11-08 10:24:07 -0700 | [diff] [blame] | 336 | * e.g. due to a concurrent blk_mq_finish_request() call. Returns true to |
| 337 | * keep iterating requests. |
Bart Van Assche | 2720bab | 2017-06-01 08:55:12 -0700 | [diff] [blame] | 338 | */ |
John Garry | 2dd6532 | 2022-07-06 20:03:53 +0800 | [diff] [blame] | 339 | static bool hctx_show_busy_rq(struct request *rq, void *data) |
Bart Van Assche | 2720bab | 2017-06-01 08:55:12 -0700 | [diff] [blame] | 340 | { |
| 341 | const struct show_busy_params *params = data; |
| 342 | |
Jens Axboe | ea4f995 | 2018-10-29 15:06:13 -0600 | [diff] [blame] | 343 | if (rq->mq_hctx == params->hctx) |
Hou Tao | b5fc1e8 | 2020-04-27 21:12:50 +0800 | [diff] [blame] | 344 | __blk_mq_debugfs_rq_show(params->m, rq); |
Jens Axboe | 7baa857 | 2018-11-08 10:24:07 -0700 | [diff] [blame] | 345 | |
| 346 | return true; |
Bart Van Assche | 2720bab | 2017-06-01 08:55:12 -0700 | [diff] [blame] | 347 | } |
| 348 | |
| 349 | static int hctx_busy_show(void *data, struct seq_file *m) |
| 350 | { |
| 351 | struct blk_mq_hw_ctx *hctx = data; |
| 352 | struct show_busy_params params = { .m = m, .hctx = hctx }; |
| 353 | |
| 354 | blk_mq_tagset_busy_iter(hctx->queue->tag_set, hctx_show_busy_rq, |
| 355 | ¶ms); |
| 356 | |
| 357 | return 0; |
| 358 | } |
| 359 | |
Ming Lei | 346fc10 | 2018-12-17 18:42:48 +0800 | [diff] [blame] | 360 | static const char *const hctx_types[] = { |
| 361 | [HCTX_TYPE_DEFAULT] = "default", |
| 362 | [HCTX_TYPE_READ] = "read", |
| 363 | [HCTX_TYPE_POLL] = "poll", |
| 364 | }; |
| 365 | |
| 366 | static int hctx_type_show(void *data, struct seq_file *m) |
| 367 | { |
| 368 | struct blk_mq_hw_ctx *hctx = data; |
| 369 | |
| 370 | BUILD_BUG_ON(ARRAY_SIZE(hctx_types) != HCTX_MAX_TYPES); |
| 371 | seq_printf(m, "%s\n", hctx_types[hctx->type]); |
| 372 | return 0; |
| 373 | } |
| 374 | |
Omar Sandoval | f57de23 | 2017-05-04 00:31:28 -0700 | [diff] [blame] | 375 | static int hctx_ctx_map_show(void *data, struct seq_file *m) |
Omar Sandoval | 950cd7e | 2017-01-25 08:06:42 -0800 | [diff] [blame] | 376 | { |
Omar Sandoval | f57de23 | 2017-05-04 00:31:28 -0700 | [diff] [blame] | 377 | struct blk_mq_hw_ctx *hctx = data; |
Omar Sandoval | 0bfa528 | 2017-01-25 08:06:45 -0800 | [diff] [blame] | 378 | |
| 379 | sbitmap_bitmap_show(&hctx->ctx_map, m); |
| 380 | return 0; |
| 381 | } |
| 382 | |
Omar Sandoval | d96b37c | 2017-01-25 08:06:46 -0800 | [diff] [blame] | 383 | static void blk_mq_debugfs_tags_show(struct seq_file *m, |
| 384 | struct blk_mq_tags *tags) |
| 385 | { |
| 386 | seq_printf(m, "nr_tags=%u\n", tags->nr_tags); |
| 387 | seq_printf(m, "nr_reserved_tags=%u\n", tags->nr_reserved_tags); |
| 388 | seq_printf(m, "active_queues=%d\n", |
Yu Kuai | 4f1731df | 2023-06-10 10:30:43 +0800 | [diff] [blame] | 389 | READ_ONCE(tags->active_queues)); |
Omar Sandoval | d96b37c | 2017-01-25 08:06:46 -0800 | [diff] [blame] | 390 | |
| 391 | seq_puts(m, "\nbitmap_tags:\n"); |
John Garry | ae0f1a7 | 2021-10-05 18:23:38 +0800 | [diff] [blame] | 392 | sbitmap_queue_show(&tags->bitmap_tags, m); |
Omar Sandoval | d96b37c | 2017-01-25 08:06:46 -0800 | [diff] [blame] | 393 | |
| 394 | if (tags->nr_reserved_tags) { |
| 395 | seq_puts(m, "\nbreserved_tags:\n"); |
John Garry | ae0f1a7 | 2021-10-05 18:23:38 +0800 | [diff] [blame] | 396 | sbitmap_queue_show(&tags->breserved_tags, m); |
Omar Sandoval | d96b37c | 2017-01-25 08:06:46 -0800 | [diff] [blame] | 397 | } |
| 398 | } |
| 399 | |
Omar Sandoval | f57de23 | 2017-05-04 00:31:28 -0700 | [diff] [blame] | 400 | static int hctx_tags_show(void *data, struct seq_file *m) |
Omar Sandoval | d96b37c | 2017-01-25 08:06:46 -0800 | [diff] [blame] | 401 | { |
Omar Sandoval | f57de23 | 2017-05-04 00:31:28 -0700 | [diff] [blame] | 402 | struct blk_mq_hw_ctx *hctx = data; |
Omar Sandoval | d96b37c | 2017-01-25 08:06:46 -0800 | [diff] [blame] | 403 | struct request_queue *q = hctx->queue; |
Bart Van Assche | 8c0f14e | 2017-02-01 10:20:58 -0800 | [diff] [blame] | 404 | int res; |
Omar Sandoval | d96b37c | 2017-01-25 08:06:46 -0800 | [diff] [blame] | 405 | |
Bart Van Assche | 8c0f14e | 2017-02-01 10:20:58 -0800 | [diff] [blame] | 406 | res = mutex_lock_interruptible(&q->sysfs_lock); |
| 407 | if (res) |
| 408 | goto out; |
Omar Sandoval | d96b37c | 2017-01-25 08:06:46 -0800 | [diff] [blame] | 409 | if (hctx->tags) |
| 410 | blk_mq_debugfs_tags_show(m, hctx->tags); |
| 411 | mutex_unlock(&q->sysfs_lock); |
| 412 | |
Bart Van Assche | 8c0f14e | 2017-02-01 10:20:58 -0800 | [diff] [blame] | 413 | out: |
| 414 | return res; |
Omar Sandoval | d96b37c | 2017-01-25 08:06:46 -0800 | [diff] [blame] | 415 | } |
| 416 | |
Omar Sandoval | f57de23 | 2017-05-04 00:31:28 -0700 | [diff] [blame] | 417 | static int hctx_tags_bitmap_show(void *data, struct seq_file *m) |
Omar Sandoval | d96b37c | 2017-01-25 08:06:46 -0800 | [diff] [blame] | 418 | { |
Omar Sandoval | f57de23 | 2017-05-04 00:31:28 -0700 | [diff] [blame] | 419 | struct blk_mq_hw_ctx *hctx = data; |
Omar Sandoval | d7e3621 | 2017-01-25 08:06:47 -0800 | [diff] [blame] | 420 | struct request_queue *q = hctx->queue; |
Bart Van Assche | 8c0f14e | 2017-02-01 10:20:58 -0800 | [diff] [blame] | 421 | int res; |
Omar Sandoval | d7e3621 | 2017-01-25 08:06:47 -0800 | [diff] [blame] | 422 | |
Bart Van Assche | 8c0f14e | 2017-02-01 10:20:58 -0800 | [diff] [blame] | 423 | res = mutex_lock_interruptible(&q->sysfs_lock); |
| 424 | if (res) |
| 425 | goto out; |
Omar Sandoval | d7e3621 | 2017-01-25 08:06:47 -0800 | [diff] [blame] | 426 | if (hctx->tags) |
John Garry | ae0f1a7 | 2021-10-05 18:23:38 +0800 | [diff] [blame] | 427 | sbitmap_bitmap_show(&hctx->tags->bitmap_tags.sb, m); |
Omar Sandoval | d7e3621 | 2017-01-25 08:06:47 -0800 | [diff] [blame] | 428 | mutex_unlock(&q->sysfs_lock); |
Bart Van Assche | 8c0f14e | 2017-02-01 10:20:58 -0800 | [diff] [blame] | 429 | |
| 430 | out: |
| 431 | return res; |
Omar Sandoval | d7e3621 | 2017-01-25 08:06:47 -0800 | [diff] [blame] | 432 | } |
| 433 | |
Omar Sandoval | f57de23 | 2017-05-04 00:31:28 -0700 | [diff] [blame] | 434 | static int hctx_sched_tags_show(void *data, struct seq_file *m) |
Omar Sandoval | d7e3621 | 2017-01-25 08:06:47 -0800 | [diff] [blame] | 435 | { |
Omar Sandoval | f57de23 | 2017-05-04 00:31:28 -0700 | [diff] [blame] | 436 | struct blk_mq_hw_ctx *hctx = data; |
Omar Sandoval | d96b37c | 2017-01-25 08:06:46 -0800 | [diff] [blame] | 437 | struct request_queue *q = hctx->queue; |
Bart Van Assche | 8c0f14e | 2017-02-01 10:20:58 -0800 | [diff] [blame] | 438 | int res; |
Omar Sandoval | d96b37c | 2017-01-25 08:06:46 -0800 | [diff] [blame] | 439 | |
Bart Van Assche | 8c0f14e | 2017-02-01 10:20:58 -0800 | [diff] [blame] | 440 | res = mutex_lock_interruptible(&q->sysfs_lock); |
| 441 | if (res) |
| 442 | goto out; |
Omar Sandoval | d96b37c | 2017-01-25 08:06:46 -0800 | [diff] [blame] | 443 | if (hctx->sched_tags) |
| 444 | blk_mq_debugfs_tags_show(m, hctx->sched_tags); |
| 445 | mutex_unlock(&q->sysfs_lock); |
| 446 | |
Bart Van Assche | 8c0f14e | 2017-02-01 10:20:58 -0800 | [diff] [blame] | 447 | out: |
| 448 | return res; |
Omar Sandoval | d96b37c | 2017-01-25 08:06:46 -0800 | [diff] [blame] | 449 | } |
| 450 | |
Omar Sandoval | f57de23 | 2017-05-04 00:31:28 -0700 | [diff] [blame] | 451 | static int hctx_sched_tags_bitmap_show(void *data, struct seq_file *m) |
Omar Sandoval | d96b37c | 2017-01-25 08:06:46 -0800 | [diff] [blame] | 452 | { |
Omar Sandoval | f57de23 | 2017-05-04 00:31:28 -0700 | [diff] [blame] | 453 | struct blk_mq_hw_ctx *hctx = data; |
Omar Sandoval | d7e3621 | 2017-01-25 08:06:47 -0800 | [diff] [blame] | 454 | struct request_queue *q = hctx->queue; |
Bart Van Assche | 8c0f14e | 2017-02-01 10:20:58 -0800 | [diff] [blame] | 455 | int res; |
Omar Sandoval | d7e3621 | 2017-01-25 08:06:47 -0800 | [diff] [blame] | 456 | |
Bart Van Assche | 8c0f14e | 2017-02-01 10:20:58 -0800 | [diff] [blame] | 457 | res = mutex_lock_interruptible(&q->sysfs_lock); |
| 458 | if (res) |
| 459 | goto out; |
Omar Sandoval | d7e3621 | 2017-01-25 08:06:47 -0800 | [diff] [blame] | 460 | if (hctx->sched_tags) |
John Garry | ae0f1a7 | 2021-10-05 18:23:38 +0800 | [diff] [blame] | 461 | sbitmap_bitmap_show(&hctx->sched_tags->bitmap_tags.sb, m); |
Omar Sandoval | d7e3621 | 2017-01-25 08:06:47 -0800 | [diff] [blame] | 462 | mutex_unlock(&q->sysfs_lock); |
Bart Van Assche | 8c0f14e | 2017-02-01 10:20:58 -0800 | [diff] [blame] | 463 | |
| 464 | out: |
| 465 | return res; |
Omar Sandoval | d7e3621 | 2017-01-25 08:06:47 -0800 | [diff] [blame] | 466 | } |
| 467 | |
Omar Sandoval | f57de23 | 2017-05-04 00:31:28 -0700 | [diff] [blame] | 468 | static int hctx_active_show(void *data, struct seq_file *m) |
Omar Sandoval | 4a46f05 | 2017-01-25 08:06:49 -0800 | [diff] [blame] | 469 | { |
Omar Sandoval | f57de23 | 2017-05-04 00:31:28 -0700 | [diff] [blame] | 470 | struct blk_mq_hw_ctx *hctx = data; |
Omar Sandoval | 4a46f05 | 2017-01-25 08:06:49 -0800 | [diff] [blame] | 471 | |
John Garry | 9b84c629 | 2021-10-29 16:40:23 +0800 | [diff] [blame] | 472 | seq_printf(m, "%d\n", __blk_mq_active_requests(hctx)); |
Omar Sandoval | 4a46f05 | 2017-01-25 08:06:49 -0800 | [diff] [blame] | 473 | return 0; |
| 474 | } |
| 475 | |
Ming Lei | 6e768717 | 2018-07-03 09:03:16 -0600 | [diff] [blame] | 476 | static int hctx_dispatch_busy_show(void *data, struct seq_file *m) |
| 477 | { |
| 478 | struct blk_mq_hw_ctx *hctx = data; |
| 479 | |
| 480 | seq_printf(m, "%u\n", hctx->dispatch_busy); |
| 481 | return 0; |
| 482 | } |
| 483 | |
Ming Lei | c16d6b5 | 2018-12-17 08:44:05 -0700 | [diff] [blame] | 484 | #define CTX_RQ_SEQ_OPS(name, type) \ |
| 485 | static void *ctx_##name##_rq_list_start(struct seq_file *m, loff_t *pos) \ |
| 486 | __acquires(&ctx->lock) \ |
| 487 | { \ |
| 488 | struct blk_mq_ctx *ctx = m->private; \ |
| 489 | \ |
| 490 | spin_lock(&ctx->lock); \ |
| 491 | return seq_list_start(&ctx->rq_lists[type], *pos); \ |
| 492 | } \ |
| 493 | \ |
| 494 | static void *ctx_##name##_rq_list_next(struct seq_file *m, void *v, \ |
| 495 | loff_t *pos) \ |
| 496 | { \ |
| 497 | struct blk_mq_ctx *ctx = m->private; \ |
| 498 | \ |
| 499 | return seq_list_next(v, &ctx->rq_lists[type], pos); \ |
| 500 | } \ |
| 501 | \ |
| 502 | static void ctx_##name##_rq_list_stop(struct seq_file *m, void *v) \ |
| 503 | __releases(&ctx->lock) \ |
| 504 | { \ |
| 505 | struct blk_mq_ctx *ctx = m->private; \ |
| 506 | \ |
| 507 | spin_unlock(&ctx->lock); \ |
| 508 | } \ |
| 509 | \ |
| 510 | static const struct seq_operations ctx_##name##_rq_list_seq_ops = { \ |
| 511 | .start = ctx_##name##_rq_list_start, \ |
| 512 | .next = ctx_##name##_rq_list_next, \ |
| 513 | .stop = ctx_##name##_rq_list_stop, \ |
| 514 | .show = blk_mq_debugfs_rq_show, \ |
Omar Sandoval | 950cd7e | 2017-01-25 08:06:42 -0800 | [diff] [blame] | 515 | } |
| 516 | |
Ming Lei | c16d6b5 | 2018-12-17 08:44:05 -0700 | [diff] [blame] | 517 | CTX_RQ_SEQ_OPS(default, HCTX_TYPE_DEFAULT); |
| 518 | CTX_RQ_SEQ_OPS(read, HCTX_TYPE_READ); |
| 519 | CTX_RQ_SEQ_OPS(poll, HCTX_TYPE_POLL); |
Omar Sandoval | 950cd7e | 2017-01-25 08:06:42 -0800 | [diff] [blame] | 520 | |
Omar Sandoval | f57de23 | 2017-05-04 00:31:28 -0700 | [diff] [blame] | 521 | static int blk_mq_debugfs_show(struct seq_file *m, void *v) |
| 522 | { |
| 523 | const struct blk_mq_debugfs_attr *attr = m->private; |
| 524 | void *data = d_inode(m->file->f_path.dentry->d_parent)->i_private; |
| 525 | |
| 526 | return attr->show(data, m); |
| 527 | } |
| 528 | |
| 529 | static ssize_t blk_mq_debugfs_write(struct file *file, const char __user *buf, |
| 530 | size_t count, loff_t *ppos) |
| 531 | { |
| 532 | struct seq_file *m = file->private_data; |
| 533 | const struct blk_mq_debugfs_attr *attr = m->private; |
| 534 | void *data = d_inode(file->f_path.dentry->d_parent)->i_private; |
| 535 | |
Eryu Guan | 6b136a2 | 2018-01-24 01:20:00 +0800 | [diff] [blame] | 536 | /* |
| 537 | * Attributes that only implement .seq_ops are read-only and 'attr' is |
| 538 | * the same with 'data' in this case. |
| 539 | */ |
| 540 | if (attr == data || !attr->write) |
Omar Sandoval | f57de23 | 2017-05-04 00:31:28 -0700 | [diff] [blame] | 541 | return -EPERM; |
| 542 | |
| 543 | return attr->write(data, buf, count, ppos); |
| 544 | } |
| 545 | |
| 546 | static int blk_mq_debugfs_open(struct inode *inode, struct file *file) |
| 547 | { |
| 548 | const struct blk_mq_debugfs_attr *attr = inode->i_private; |
| 549 | void *data = d_inode(file->f_path.dentry->d_parent)->i_private; |
| 550 | struct seq_file *m; |
| 551 | int ret; |
| 552 | |
| 553 | if (attr->seq_ops) { |
| 554 | ret = seq_open(file, attr->seq_ops); |
| 555 | if (!ret) { |
| 556 | m = file->private_data; |
| 557 | m->private = data; |
| 558 | } |
| 559 | return ret; |
| 560 | } |
| 561 | |
| 562 | if (WARN_ON_ONCE(!attr->show)) |
| 563 | return -EPERM; |
| 564 | |
| 565 | return single_open(file, blk_mq_debugfs_show, inode->i_private); |
| 566 | } |
| 567 | |
| 568 | static int blk_mq_debugfs_release(struct inode *inode, struct file *file) |
| 569 | { |
| 570 | const struct blk_mq_debugfs_attr *attr = inode->i_private; |
| 571 | |
| 572 | if (attr->show) |
| 573 | return single_release(inode, file); |
Chaitanya Kulkarni | ee1e035 | 2019-06-19 15:01:48 -0700 | [diff] [blame] | 574 | |
| 575 | return seq_release(inode, file); |
Omar Sandoval | f57de23 | 2017-05-04 00:31:28 -0700 | [diff] [blame] | 576 | } |
| 577 | |
Bart Van Assche | f846593 | 2017-08-17 16:23:04 -0700 | [diff] [blame] | 578 | static const struct file_operations blk_mq_debugfs_fops = { |
Omar Sandoval | f57de23 | 2017-05-04 00:31:28 -0700 | [diff] [blame] | 579 | .open = blk_mq_debugfs_open, |
Omar Sandoval | 4a46f05 | 2017-01-25 08:06:49 -0800 | [diff] [blame] | 580 | .read = seq_read, |
Omar Sandoval | f57de23 | 2017-05-04 00:31:28 -0700 | [diff] [blame] | 581 | .write = blk_mq_debugfs_write, |
Omar Sandoval | 4a46f05 | 2017-01-25 08:06:49 -0800 | [diff] [blame] | 582 | .llseek = seq_lseek, |
Omar Sandoval | f57de23 | 2017-05-04 00:31:28 -0700 | [diff] [blame] | 583 | .release = blk_mq_debugfs_release, |
Omar Sandoval | 4a46f05 | 2017-01-25 08:06:49 -0800 | [diff] [blame] | 584 | }; |
| 585 | |
Omar Sandoval | 07e4fea | 2017-01-25 08:06:40 -0800 | [diff] [blame] | 586 | static const struct blk_mq_debugfs_attr blk_mq_debugfs_hctx_attrs[] = { |
Omar Sandoval | f57de23 | 2017-05-04 00:31:28 -0700 | [diff] [blame] | 587 | {"state", 0400, hctx_state_show}, |
| 588 | {"flags", 0400, hctx_flags_show}, |
| 589 | {"dispatch", 0400, .seq_ops = &hctx_dispatch_seq_ops}, |
Bart Van Assche | 2720bab | 2017-06-01 08:55:12 -0700 | [diff] [blame] | 590 | {"busy", 0400, hctx_busy_show}, |
Omar Sandoval | f57de23 | 2017-05-04 00:31:28 -0700 | [diff] [blame] | 591 | {"ctx_map", 0400, hctx_ctx_map_show}, |
| 592 | {"tags", 0400, hctx_tags_show}, |
| 593 | {"tags_bitmap", 0400, hctx_tags_bitmap_show}, |
| 594 | {"sched_tags", 0400, hctx_sched_tags_show}, |
| 595 | {"sched_tags_bitmap", 0400, hctx_sched_tags_bitmap_show}, |
Omar Sandoval | f57de23 | 2017-05-04 00:31:28 -0700 | [diff] [blame] | 596 | {"active", 0400, hctx_active_show}, |
Ming Lei | 6e768717 | 2018-07-03 09:03:16 -0600 | [diff] [blame] | 597 | {"dispatch_busy", 0400, hctx_dispatch_busy_show}, |
Ming Lei | 346fc10 | 2018-12-17 18:42:48 +0800 | [diff] [blame] | 598 | {"type", 0400, hctx_type_show}, |
Bart Van Assche | 72f2f8f | 2017-02-01 10:20:59 -0800 | [diff] [blame] | 599 | {}, |
Omar Sandoval | 07e4fea | 2017-01-25 08:06:40 -0800 | [diff] [blame] | 600 | }; |
| 601 | |
| 602 | static const struct blk_mq_debugfs_attr blk_mq_debugfs_ctx_attrs[] = { |
Ming Lei | c16d6b5 | 2018-12-17 08:44:05 -0700 | [diff] [blame] | 603 | {"default_rq_list", 0400, .seq_ops = &ctx_default_rq_list_seq_ops}, |
| 604 | {"read_rq_list", 0400, .seq_ops = &ctx_read_rq_list_seq_ops}, |
| 605 | {"poll_rq_list", 0400, .seq_ops = &ctx_poll_rq_list_seq_ops}, |
Bart Van Assche | 72f2f8f | 2017-02-01 10:20:59 -0800 | [diff] [blame] | 606 | {}, |
Omar Sandoval | 07e4fea | 2017-01-25 08:06:40 -0800 | [diff] [blame] | 607 | }; |
| 608 | |
Greg Kroah-Hartman | 6cfc008 | 2019-06-12 14:30:19 +0200 | [diff] [blame] | 609 | static void debugfs_create_files(struct dentry *parent, void *data, |
Omar Sandoval | f57de23 | 2017-05-04 00:31:28 -0700 | [diff] [blame] | 610 | const struct blk_mq_debugfs_attr *attr) |
Bart Van Assche | 72f2f8f | 2017-02-01 10:20:59 -0800 | [diff] [blame] | 611 | { |
Greg Kroah-Hartman | 36991ca | 2019-01-23 14:48:54 +0100 | [diff] [blame] | 612 | if (IS_ERR_OR_NULL(parent)) |
Greg Kroah-Hartman | 6cfc008 | 2019-06-12 14:30:19 +0200 | [diff] [blame] | 613 | return; |
Greg Kroah-Hartman | 36991ca | 2019-01-23 14:48:54 +0100 | [diff] [blame] | 614 | |
Omar Sandoval | f57de23 | 2017-05-04 00:31:28 -0700 | [diff] [blame] | 615 | d_inode(parent)->i_private = data; |
| 616 | |
Greg Kroah-Hartman | 6cfc008 | 2019-06-12 14:30:19 +0200 | [diff] [blame] | 617 | for (; attr->name; attr++) |
| 618 | debugfs_create_file(attr->name, attr->mode, parent, |
| 619 | (void *)attr, &blk_mq_debugfs_fops); |
Bart Van Assche | 72f2f8f | 2017-02-01 10:20:59 -0800 | [diff] [blame] | 620 | } |
| 621 | |
Greg Kroah-Hartman | 6cfc008 | 2019-06-12 14:30:19 +0200 | [diff] [blame] | 622 | void blk_mq_debugfs_register(struct request_queue *q) |
Omar Sandoval | 9c1051a | 2017-05-04 08:17:21 -0600 | [diff] [blame] | 623 | { |
| 624 | struct blk_mq_hw_ctx *hctx; |
Ming Lei | 4f48120 | 2022-03-08 15:32:18 +0800 | [diff] [blame] | 625 | unsigned long i; |
Omar Sandoval | 9c1051a | 2017-05-04 08:17:21 -0600 | [diff] [blame] | 626 | |
Greg Kroah-Hartman | 6cfc008 | 2019-06-12 14:30:19 +0200 | [diff] [blame] | 627 | debugfs_create_files(q->debugfs_dir, q, blk_mq_debugfs_queue_attrs); |
Omar Sandoval | 9c1051a | 2017-05-04 08:17:21 -0600 | [diff] [blame] | 628 | |
| 629 | /* |
Omar Sandoval | 70e62f4 | 2017-10-03 14:57:16 -0700 | [diff] [blame] | 630 | * blk_mq_init_sched() attempted to do this already, but q->debugfs_dir |
Omar Sandoval | 9c1051a | 2017-05-04 08:17:21 -0600 | [diff] [blame] | 631 | * didn't exist yet (because we don't know what to name the directory |
| 632 | * until the queue is registered to a gendisk). |
| 633 | */ |
Omar Sandoval | 70e62f4 | 2017-10-03 14:57:16 -0700 | [diff] [blame] | 634 | if (q->elevator && !q->sched_debugfs_dir) |
| 635 | blk_mq_debugfs_register_sched(q); |
| 636 | |
| 637 | /* Similarly, blk_mq_init_hctx() couldn't do this previously. */ |
Omar Sandoval | 9c1051a | 2017-05-04 08:17:21 -0600 | [diff] [blame] | 638 | queue_for_each_hw_ctx(q, hctx, i) { |
Greg Kroah-Hartman | 6cfc008 | 2019-06-12 14:30:19 +0200 | [diff] [blame] | 639 | if (!hctx->debugfs_dir) |
| 640 | blk_mq_debugfs_register_hctx(q, hctx); |
| 641 | if (q->elevator && !hctx->sched_debugfs_dir) |
| 642 | blk_mq_debugfs_register_sched_hctx(q, hctx); |
Omar Sandoval | 9c1051a | 2017-05-04 08:17:21 -0600 | [diff] [blame] | 643 | } |
| 644 | |
Ming Lei | cc56694 | 2018-12-17 09:46:00 +0800 | [diff] [blame] | 645 | if (q->rq_qos) { |
| 646 | struct rq_qos *rqos = q->rq_qos; |
| 647 | |
| 648 | while (rqos) { |
| 649 | blk_mq_debugfs_register_rqos(rqos); |
| 650 | rqos = rqos->next; |
| 651 | } |
| 652 | } |
Omar Sandoval | 9c1051a | 2017-05-04 08:17:21 -0600 | [diff] [blame] | 653 | } |
| 654 | |
Greg Kroah-Hartman | 6cfc008 | 2019-06-12 14:30:19 +0200 | [diff] [blame] | 655 | static void blk_mq_debugfs_register_ctx(struct blk_mq_hw_ctx *hctx, |
| 656 | struct blk_mq_ctx *ctx) |
Omar Sandoval | 07e4fea | 2017-01-25 08:06:40 -0800 | [diff] [blame] | 657 | { |
| 658 | struct dentry *ctx_dir; |
| 659 | char name[20]; |
Omar Sandoval | 07e4fea | 2017-01-25 08:06:40 -0800 | [diff] [blame] | 660 | |
| 661 | snprintf(name, sizeof(name), "cpu%u", ctx->cpu); |
Omar Sandoval | 9c1051a | 2017-05-04 08:17:21 -0600 | [diff] [blame] | 662 | ctx_dir = debugfs_create_dir(name, hctx->debugfs_dir); |
Omar Sandoval | 07e4fea | 2017-01-25 08:06:40 -0800 | [diff] [blame] | 663 | |
Greg Kroah-Hartman | 6cfc008 | 2019-06-12 14:30:19 +0200 | [diff] [blame] | 664 | debugfs_create_files(ctx_dir, ctx, blk_mq_debugfs_ctx_attrs); |
Omar Sandoval | 07e4fea | 2017-01-25 08:06:40 -0800 | [diff] [blame] | 665 | } |
| 666 | |
Greg Kroah-Hartman | 6cfc008 | 2019-06-12 14:30:19 +0200 | [diff] [blame] | 667 | void blk_mq_debugfs_register_hctx(struct request_queue *q, |
| 668 | struct blk_mq_hw_ctx *hctx) |
Omar Sandoval | 07e4fea | 2017-01-25 08:06:40 -0800 | [diff] [blame] | 669 | { |
| 670 | struct blk_mq_ctx *ctx; |
Omar Sandoval | 07e4fea | 2017-01-25 08:06:40 -0800 | [diff] [blame] | 671 | char name[20]; |
| 672 | int i; |
| 673 | |
Ming Lei | f3ec5d1 | 2022-07-11 17:08:08 +0800 | [diff] [blame] | 674 | if (!q->debugfs_dir) |
| 675 | return; |
| 676 | |
Omar Sandoval | 9c1051a | 2017-05-04 08:17:21 -0600 | [diff] [blame] | 677 | snprintf(name, sizeof(name), "hctx%u", hctx->queue_num); |
| 678 | hctx->debugfs_dir = debugfs_create_dir(name, q->debugfs_dir); |
Omar Sandoval | 9c1051a | 2017-05-04 08:17:21 -0600 | [diff] [blame] | 679 | |
Greg Kroah-Hartman | 6cfc008 | 2019-06-12 14:30:19 +0200 | [diff] [blame] | 680 | debugfs_create_files(hctx->debugfs_dir, hctx, blk_mq_debugfs_hctx_attrs); |
Omar Sandoval | 07e4fea | 2017-01-25 08:06:40 -0800 | [diff] [blame] | 681 | |
Greg Kroah-Hartman | 6cfc008 | 2019-06-12 14:30:19 +0200 | [diff] [blame] | 682 | hctx_for_each_ctx(hctx, ctx, i) |
| 683 | blk_mq_debugfs_register_ctx(hctx, ctx); |
Omar Sandoval | 07e4fea | 2017-01-25 08:06:40 -0800 | [diff] [blame] | 684 | } |
| 685 | |
Omar Sandoval | 9c1051a | 2017-05-04 08:17:21 -0600 | [diff] [blame] | 686 | void blk_mq_debugfs_unregister_hctx(struct blk_mq_hw_ctx *hctx) |
Omar Sandoval | 07e4fea | 2017-01-25 08:06:40 -0800 | [diff] [blame] | 687 | { |
Christoph Hellwig | 5cf9c91 | 2022-06-14 09:48:25 +0200 | [diff] [blame] | 688 | if (!hctx->queue->debugfs_dir) |
| 689 | return; |
Omar Sandoval | 9c1051a | 2017-05-04 08:17:21 -0600 | [diff] [blame] | 690 | debugfs_remove_recursive(hctx->debugfs_dir); |
Omar Sandoval | d332ce0 | 2017-05-04 08:24:40 -0600 | [diff] [blame] | 691 | hctx->sched_debugfs_dir = NULL; |
Omar Sandoval | 9c1051a | 2017-05-04 08:17:21 -0600 | [diff] [blame] | 692 | hctx->debugfs_dir = NULL; |
| 693 | } |
| 694 | |
Greg Kroah-Hartman | 6cfc008 | 2019-06-12 14:30:19 +0200 | [diff] [blame] | 695 | void blk_mq_debugfs_register_hctxs(struct request_queue *q) |
Omar Sandoval | 9c1051a | 2017-05-04 08:17:21 -0600 | [diff] [blame] | 696 | { |
| 697 | struct blk_mq_hw_ctx *hctx; |
Ming Lei | 4f48120 | 2022-03-08 15:32:18 +0800 | [diff] [blame] | 698 | unsigned long i; |
Omar Sandoval | 9c1051a | 2017-05-04 08:17:21 -0600 | [diff] [blame] | 699 | |
Greg Kroah-Hartman | 6cfc008 | 2019-06-12 14:30:19 +0200 | [diff] [blame] | 700 | queue_for_each_hw_ctx(q, hctx, i) |
| 701 | blk_mq_debugfs_register_hctx(q, hctx); |
Omar Sandoval | 9c1051a | 2017-05-04 08:17:21 -0600 | [diff] [blame] | 702 | } |
| 703 | |
| 704 | void blk_mq_debugfs_unregister_hctxs(struct request_queue *q) |
| 705 | { |
| 706 | struct blk_mq_hw_ctx *hctx; |
Ming Lei | 4f48120 | 2022-03-08 15:32:18 +0800 | [diff] [blame] | 707 | unsigned long i; |
Omar Sandoval | 9c1051a | 2017-05-04 08:17:21 -0600 | [diff] [blame] | 708 | |
| 709 | queue_for_each_hw_ctx(q, hctx, i) |
| 710 | blk_mq_debugfs_unregister_hctx(hctx); |
Omar Sandoval | 07e4fea | 2017-01-25 08:06:40 -0800 | [diff] [blame] | 711 | } |
Omar Sandoval | d332ce0 | 2017-05-04 08:24:40 -0600 | [diff] [blame] | 712 | |
Greg Kroah-Hartman | 6cfc008 | 2019-06-12 14:30:19 +0200 | [diff] [blame] | 713 | void blk_mq_debugfs_register_sched(struct request_queue *q) |
Omar Sandoval | d332ce0 | 2017-05-04 08:24:40 -0600 | [diff] [blame] | 714 | { |
| 715 | struct elevator_type *e = q->elevator->type; |
| 716 | |
Christoph Hellwig | 5cf9c91 | 2022-06-14 09:48:25 +0200 | [diff] [blame] | 717 | lockdep_assert_held(&q->debugfs_mutex); |
| 718 | |
Greg Kroah-Hartman | 7e41c3c | 2019-07-06 17:50:32 +0200 | [diff] [blame] | 719 | /* |
| 720 | * If the parent directory has not been created yet, return, we will be |
| 721 | * called again later on and the directory/files will be created then. |
| 722 | */ |
| 723 | if (!q->debugfs_dir) |
| 724 | return; |
| 725 | |
Omar Sandoval | d332ce0 | 2017-05-04 08:24:40 -0600 | [diff] [blame] | 726 | if (!e->queue_debugfs_attrs) |
Greg Kroah-Hartman | 6cfc008 | 2019-06-12 14:30:19 +0200 | [diff] [blame] | 727 | return; |
Omar Sandoval | d332ce0 | 2017-05-04 08:24:40 -0600 | [diff] [blame] | 728 | |
| 729 | q->sched_debugfs_dir = debugfs_create_dir("sched", q->debugfs_dir); |
Omar Sandoval | d332ce0 | 2017-05-04 08:24:40 -0600 | [diff] [blame] | 730 | |
Greg Kroah-Hartman | 6cfc008 | 2019-06-12 14:30:19 +0200 | [diff] [blame] | 731 | debugfs_create_files(q->sched_debugfs_dir, q, e->queue_debugfs_attrs); |
Omar Sandoval | d332ce0 | 2017-05-04 08:24:40 -0600 | [diff] [blame] | 732 | } |
| 733 | |
| 734 | void blk_mq_debugfs_unregister_sched(struct request_queue *q) |
| 735 | { |
Christoph Hellwig | 5cf9c91 | 2022-06-14 09:48:25 +0200 | [diff] [blame] | 736 | lockdep_assert_held(&q->debugfs_mutex); |
| 737 | |
Omar Sandoval | d332ce0 | 2017-05-04 08:24:40 -0600 | [diff] [blame] | 738 | debugfs_remove_recursive(q->sched_debugfs_dir); |
| 739 | q->sched_debugfs_dir = NULL; |
| 740 | } |
| 741 | |
Bart Van Assche | fb44023 | 2021-06-17 17:44:43 -0700 | [diff] [blame] | 742 | static const char *rq_qos_id_to_name(enum rq_qos_id id) |
| 743 | { |
| 744 | switch (id) { |
| 745 | case RQ_QOS_WBT: |
| 746 | return "wbt"; |
| 747 | case RQ_QOS_LATENCY: |
| 748 | return "latency"; |
| 749 | case RQ_QOS_COST: |
| 750 | return "cost"; |
| 751 | } |
| 752 | return "unknown"; |
| 753 | } |
| 754 | |
Ming Lei | cc56694 | 2018-12-17 09:46:00 +0800 | [diff] [blame] | 755 | void blk_mq_debugfs_unregister_rqos(struct rq_qos *rqos) |
| 756 | { |
Christoph Hellwig | ba91c84 | 2023-02-03 16:03:56 +0100 | [diff] [blame] | 757 | lockdep_assert_held(&rqos->disk->queue->debugfs_mutex); |
Christoph Hellwig | 5cf9c91 | 2022-06-14 09:48:25 +0200 | [diff] [blame] | 758 | |
Christoph Hellwig | ba91c84 | 2023-02-03 16:03:56 +0100 | [diff] [blame] | 759 | if (!rqos->disk->queue->debugfs_dir) |
Christoph Hellwig | 5cf9c91 | 2022-06-14 09:48:25 +0200 | [diff] [blame] | 760 | return; |
Ming Lei | cc56694 | 2018-12-17 09:46:00 +0800 | [diff] [blame] | 761 | debugfs_remove_recursive(rqos->debugfs_dir); |
| 762 | rqos->debugfs_dir = NULL; |
| 763 | } |
| 764 | |
Greg Kroah-Hartman | 6cfc008 | 2019-06-12 14:30:19 +0200 | [diff] [blame] | 765 | void blk_mq_debugfs_register_rqos(struct rq_qos *rqos) |
Ming Lei | cc56694 | 2018-12-17 09:46:00 +0800 | [diff] [blame] | 766 | { |
Christoph Hellwig | ba91c84 | 2023-02-03 16:03:56 +0100 | [diff] [blame] | 767 | struct request_queue *q = rqos->disk->queue; |
Ming Lei | cc56694 | 2018-12-17 09:46:00 +0800 | [diff] [blame] | 768 | const char *dir_name = rq_qos_id_to_name(rqos->id); |
| 769 | |
Christoph Hellwig | 5cf9c91 | 2022-06-14 09:48:25 +0200 | [diff] [blame] | 770 | lockdep_assert_held(&q->debugfs_mutex); |
| 771 | |
Ming Lei | cc56694 | 2018-12-17 09:46:00 +0800 | [diff] [blame] | 772 | if (rqos->debugfs_dir || !rqos->ops->debugfs_attrs) |
Greg Kroah-Hartman | 6cfc008 | 2019-06-12 14:30:19 +0200 | [diff] [blame] | 773 | return; |
Ming Lei | cc56694 | 2018-12-17 09:46:00 +0800 | [diff] [blame] | 774 | |
Greg Kroah-Hartman | 6cfc008 | 2019-06-12 14:30:19 +0200 | [diff] [blame] | 775 | if (!q->rqos_debugfs_dir) |
Ming Lei | cc56694 | 2018-12-17 09:46:00 +0800 | [diff] [blame] | 776 | q->rqos_debugfs_dir = debugfs_create_dir("rqos", |
| 777 | q->debugfs_dir); |
Ming Lei | cc56694 | 2018-12-17 09:46:00 +0800 | [diff] [blame] | 778 | |
Christoph Hellwig | ba91c84 | 2023-02-03 16:03:56 +0100 | [diff] [blame] | 779 | rqos->debugfs_dir = debugfs_create_dir(dir_name, q->rqos_debugfs_dir); |
Greg Kroah-Hartman | 6cfc008 | 2019-06-12 14:30:19 +0200 | [diff] [blame] | 780 | debugfs_create_files(rqos->debugfs_dir, rqos, rqos->ops->debugfs_attrs); |
Ming Lei | cc56694 | 2018-12-17 09:46:00 +0800 | [diff] [blame] | 781 | } |
| 782 | |
Greg Kroah-Hartman | 6cfc008 | 2019-06-12 14:30:19 +0200 | [diff] [blame] | 783 | void blk_mq_debugfs_register_sched_hctx(struct request_queue *q, |
| 784 | struct blk_mq_hw_ctx *hctx) |
Omar Sandoval | d332ce0 | 2017-05-04 08:24:40 -0600 | [diff] [blame] | 785 | { |
| 786 | struct elevator_type *e = q->elevator->type; |
| 787 | |
Christoph Hellwig | 5cf9c91 | 2022-06-14 09:48:25 +0200 | [diff] [blame] | 788 | lockdep_assert_held(&q->debugfs_mutex); |
| 789 | |
Saravanan D | 1e91e28 | 2021-04-07 10:59:58 -0700 | [diff] [blame] | 790 | /* |
| 791 | * If the parent debugfs directory has not been created yet, return; |
| 792 | * We will be called again later on with appropriate parent debugfs |
| 793 | * directory from blk_register_queue() |
| 794 | */ |
| 795 | if (!hctx->debugfs_dir) |
| 796 | return; |
| 797 | |
Omar Sandoval | d332ce0 | 2017-05-04 08:24:40 -0600 | [diff] [blame] | 798 | if (!e->hctx_debugfs_attrs) |
Greg Kroah-Hartman | 6cfc008 | 2019-06-12 14:30:19 +0200 | [diff] [blame] | 799 | return; |
Omar Sandoval | d332ce0 | 2017-05-04 08:24:40 -0600 | [diff] [blame] | 800 | |
| 801 | hctx->sched_debugfs_dir = debugfs_create_dir("sched", |
| 802 | hctx->debugfs_dir); |
Greg Kroah-Hartman | 6cfc008 | 2019-06-12 14:30:19 +0200 | [diff] [blame] | 803 | debugfs_create_files(hctx->sched_debugfs_dir, hctx, |
| 804 | e->hctx_debugfs_attrs); |
Omar Sandoval | d332ce0 | 2017-05-04 08:24:40 -0600 | [diff] [blame] | 805 | } |
| 806 | |
| 807 | void blk_mq_debugfs_unregister_sched_hctx(struct blk_mq_hw_ctx *hctx) |
| 808 | { |
Christoph Hellwig | 5cf9c91 | 2022-06-14 09:48:25 +0200 | [diff] [blame] | 809 | lockdep_assert_held(&hctx->queue->debugfs_mutex); |
| 810 | |
| 811 | if (!hctx->queue->debugfs_dir) |
| 812 | return; |
Omar Sandoval | d332ce0 | 2017-05-04 08:24:40 -0600 | [diff] [blame] | 813 | debugfs_remove_recursive(hctx->sched_debugfs_dir); |
| 814 | hctx->sched_debugfs_dir = NULL; |
| 815 | } |