| 1 | /* |
| 2 | * ltt/probes/block-trace.c |
| 3 | * |
| 4 | * block layer tracepoint probes. |
| 5 | * |
| 6 | * (C) Copyright 2009 - Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> |
| 7 | * Dual LGPL v2.1/GPL v2 license. |
| 8 | */ |
| 9 | |
| 10 | #include <linux/module.h> |
| 11 | |
| 12 | #include <trace/events/block.h> |
| 13 | |
| 14 | /* |
| 15 | * Add rq cmd as a sequence. Needs new type. (size + binary blob) |
| 16 | */ |
| 17 | |
| 18 | void probe_block_rq_abort(void *data, struct request_queue *q, struct request *rq) |
| 19 | { |
| 20 | int rw = rq->cmd_flags & 0x03; |
| 21 | |
| 22 | if (blk_discard_rq(rq)) |
| 23 | rw |= (1 << BIO_RW_DISCARD); |
| 24 | |
| 25 | if (blk_pc_request(rq)) { |
| 26 | trace_mark_tp(block, rq_abort_pc, block_rq_abort, |
| 27 | probe_block_rq_abort, |
| 28 | "data_len %u rw %d errors %d", |
| 29 | blk_rq_bytes(rq), rw, rq->errors); |
| 30 | } else { |
| 31 | /* |
| 32 | * FIXME Using a simple trace_mark for the second event |
| 33 | * possibility because tracepoints do not support multiple |
| 34 | * connections to the same probe yet. They should have some |
| 35 | * refcounting. Need to enable both rq_abort_pc and rq_abort_fs |
| 36 | * markers to have the rq_abort_fs marker enabled. |
| 37 | */ |
| 38 | trace_mark(block, rq_abort_fs, |
| 39 | "hard_sector %llu " |
| 40 | "rw %d errors %d", (unsigned long long)blk_rq_pos(rq), |
| 41 | rw, rq->errors); |
| 42 | } |
| 43 | } |
| 44 | |
| 45 | void probe_block_rq_insert(void *data, struct request_queue *q, struct request *rq) |
| 46 | { |
| 47 | int rw = rq->cmd_flags & 0x03; |
| 48 | |
| 49 | if (blk_discard_rq(rq)) |
| 50 | rw |= (1 << BIO_RW_DISCARD); |
| 51 | |
| 52 | if (blk_pc_request(rq)) { |
| 53 | trace_mark_tp(block, rq_insert_pc, block_rq_insert, |
| 54 | probe_block_rq_insert, |
| 55 | "data_len %u rw %d errors %d", |
| 56 | blk_rq_bytes(rq), rw, rq->errors); |
| 57 | } else { |
| 58 | /* |
| 59 | * FIXME Using a simple trace_mark for the second event |
| 60 | * possibility because tracepoints do not support multiple |
| 61 | * connections to the same probe yet. They should have some |
| 62 | * refcounting. Need to enable both rq_insert_pc and |
| 63 | * rq_insert_fs markers to have the rq_insert_fs marker enabled. |
| 64 | */ |
| 65 | trace_mark(block, rq_insert_fs, |
| 66 | "hard_sector %llu " |
| 67 | "rw %d errors %d", (unsigned long long)blk_rq_pos(rq), |
| 68 | rw, rq->errors); |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | void probe_block_rq_issue(void *data, struct request_queue *q, struct request *rq) |
| 73 | { |
| 74 | int rw = rq->cmd_flags & 0x03; |
| 75 | |
| 76 | if (blk_discard_rq(rq)) |
| 77 | rw |= (1 << BIO_RW_DISCARD); |
| 78 | |
| 79 | if (blk_pc_request(rq)) { |
| 80 | trace_mark_tp(block, rq_issue_pc, block_rq_issue, |
| 81 | probe_block_rq_issue, |
| 82 | "data_len %u rw %d errors %d", |
| 83 | blk_rq_bytes(rq), rw, rq->errors); |
| 84 | } else { |
| 85 | /* |
| 86 | * FIXME Using a simple trace_mark for the second event |
| 87 | * possibility because tracepoints do not support multiple |
| 88 | * connections to the same probe yet. They should have some |
| 89 | * refcounting. Need to enable both rq_issue_pc and rq_issue_fs |
| 90 | * markers to have the rq_issue_fs marker enabled. |
| 91 | */ |
| 92 | trace_mark(block, rq_issue_fs, |
| 93 | "hard_sector %llu " |
| 94 | "rw %d errors %d", (unsigned long long)blk_rq_pos(rq), |
| 95 | rw, rq->errors); |
| 96 | } |
| 97 | } |
| 98 | |
| 99 | void probe_block_rq_requeue(void *data, struct request_queue *q, struct request *rq) |
| 100 | { |
| 101 | int rw = rq->cmd_flags & 0x03; |
| 102 | |
| 103 | if (blk_discard_rq(rq)) |
| 104 | rw |= (1 << BIO_RW_DISCARD); |
| 105 | |
| 106 | if (blk_pc_request(rq)) { |
| 107 | trace_mark_tp(block, rq_requeue_pc, block_rq_requeue, |
| 108 | probe_block_rq_requeue, |
| 109 | "data_len %u rw %d errors %d", |
| 110 | blk_rq_bytes(rq), rw, rq->errors); |
| 111 | } else { |
| 112 | /* |
| 113 | * FIXME Using a simple trace_mark for the second event |
| 114 | * possibility because tracepoints do not support multiple |
| 115 | * connections to the same probe yet. They should have some |
| 116 | * refcounting. Need to enable both rq_requeue_pc and |
| 117 | * rq_requeue_fs markers to have the rq_requeue_fs marker |
| 118 | * enabled. |
| 119 | */ |
| 120 | trace_mark(block, rq_requeue_fs, |
| 121 | "hard_sector %llu " |
| 122 | "rw %d errors %d", (unsigned long long)blk_rq_pos(rq), |
| 123 | rw, rq->errors); |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | void probe_block_rq_complete(void *data, struct request_queue *q, struct request *rq) |
| 128 | { |
| 129 | int rw = rq->cmd_flags & 0x03; |
| 130 | |
| 131 | if (blk_discard_rq(rq)) |
| 132 | rw |= (1 << BIO_RW_DISCARD); |
| 133 | |
| 134 | if (blk_pc_request(rq)) { |
| 135 | trace_mark_tp(block, rq_complete_pc, block_rq_complete, |
| 136 | probe_block_rq_complete, |
| 137 | "data_len %u rw %d errors %d", |
| 138 | blk_rq_bytes(rq), rw, rq->errors); |
| 139 | } else { |
| 140 | /* |
| 141 | * FIXME Using a simple trace_mark for the second event |
| 142 | * possibility because tracepoints do not support multiple |
| 143 | * connections to the same probe yet. They should have some |
| 144 | * refcounting. Need to enable both rq_complete_pc and |
| 145 | * rq_complete_fs markers to have the rq_complete_fs marker |
| 146 | * enabled. |
| 147 | */ |
| 148 | trace_mark(block, rq_complete_fs, |
| 149 | "hard_sector %llu " |
| 150 | "rw %d errors %d", (unsigned long long)blk_rq_pos(rq), |
| 151 | rw, rq->errors); |
| 152 | } |
| 153 | } |
| 154 | |
| 155 | void probe_block_bio_bounce(void *data, struct request_queue *q, struct bio *bio) |
| 156 | { |
| 157 | trace_mark_tp(block, bio_bounce, block_bio_bounce, |
| 158 | probe_block_bio_bounce, |
| 159 | "sector %llu size %u rw(FAILFAST_DRIVER,FAILFAST_TRANSPORT," |
| 160 | "FAILFAST_DEV,DISCARD,META,SYNC,BARRIER,AHEAD,RW) %lX " |
| 161 | "not_uptodate #1u%d", |
| 162 | (unsigned long long)bio->bi_sector, bio->bi_size, |
| 163 | bio->bi_rw, !bio_flagged(bio, BIO_UPTODATE)); |
| 164 | } |
| 165 | |
| 166 | void probe_block_bio_complete(void *data, struct request_queue *q, struct bio *bio) |
| 167 | { |
| 168 | trace_mark_tp(block, bio_complete, block_bio_complete, |
| 169 | probe_block_bio_complete, |
| 170 | "sector %llu size %u rw(FAILFAST_DRIVER,FAILFAST_TRANSPORT," |
| 171 | "FAILFAST_DEV,DISCARD,META,SYNC,BARRIER,AHEAD,RW) %lX " |
| 172 | "not_uptodate #1u%d", |
| 173 | (unsigned long long)bio->bi_sector, bio->bi_size, |
| 174 | bio->bi_rw, !bio_flagged(bio, BIO_UPTODATE)); |
| 175 | } |
| 176 | |
| 177 | void probe_block_bio_backmerge(void *data, struct request_queue *q, struct bio *bio) |
| 178 | { |
| 179 | trace_mark_tp(block, bio_backmerge, block_bio_backmerge, |
| 180 | probe_block_bio_backmerge, |
| 181 | "sector %llu size %u rw(FAILFAST_DRIVER,FAILFAST_TRANSPORT," |
| 182 | "FAILFAST_DEV,DISCARD,META,SYNC,BARRIER,AHEAD,RW) %lX " |
| 183 | "not_uptodate #1u%d", |
| 184 | (unsigned long long)bio->bi_sector, bio->bi_size, |
| 185 | bio->bi_rw, !bio_flagged(bio, BIO_UPTODATE)); |
| 186 | } |
| 187 | |
| 188 | void probe_block_bio_frontmerge(void *data, struct request_queue *q, struct bio *bio) |
| 189 | { |
| 190 | trace_mark_tp(block, bio_frontmerge, block_bio_frontmerge, |
| 191 | probe_block_bio_frontmerge, |
| 192 | "sector %llu size %u rw(FAILFAST_DRIVER,FAILFAST_TRANSPORT," |
| 193 | "FAILFAST_DEV,DISCARD,META,SYNC,BARRIER,AHEAD,RW) %lX " |
| 194 | "not_uptodate #1u%d", |
| 195 | (unsigned long long)bio->bi_sector, bio->bi_size, |
| 196 | bio->bi_rw, !bio_flagged(bio, BIO_UPTODATE)); |
| 197 | } |
| 198 | |
| 199 | void probe_block_bio_queue(void *data, struct request_queue *q, struct bio *bio) |
| 200 | { |
| 201 | trace_mark_tp(block, bio_queue, block_bio_queue, |
| 202 | probe_block_bio_queue, |
| 203 | "sector %llu size %u rw(FAILFAST_DRIVER,FAILFAST_TRANSPORT," |
| 204 | "FAILFAST_DEV,DISCARD,META,SYNC,BARRIER,AHEAD,RW) %lX " |
| 205 | "not_uptodate #1u%d", |
| 206 | (unsigned long long)bio->bi_sector, bio->bi_size, |
| 207 | bio->bi_rw, !bio_flagged(bio, BIO_UPTODATE)); |
| 208 | } |
| 209 | |
| 210 | void probe_block_getrq(void *data, struct request_queue *q, struct bio *bio, int rw) |
| 211 | { |
| 212 | if (bio) { |
| 213 | trace_mark_tp(block, getrq_bio, block_getrq, |
| 214 | probe_block_getrq, |
| 215 | "sector %llu size %u " |
| 216 | "rw(FAILFAST_DRIVER,FAILFAST_TRANSPORT," |
| 217 | "FAILFAST_DEV,DISCARD,META,SYNC,BARRIER,AHEAD,RW) %lX " |
| 218 | "not_uptodate #1u%d", |
| 219 | (unsigned long long)bio->bi_sector, bio->bi_size, |
| 220 | bio->bi_rw, !bio_flagged(bio, BIO_UPTODATE)); |
| 221 | } else { |
| 222 | /* |
| 223 | * FIXME Using a simple trace_mark for the second event |
| 224 | * possibility because tracepoints do not support multiple |
| 225 | * connections to the same probe yet. They should have some |
| 226 | * refcounting. Need to enable both getrq_bio and getrq markers |
| 227 | * to have the getrq marker enabled. |
| 228 | */ |
| 229 | trace_mark(block, getrq, "rw %d", rw); |
| 230 | } |
| 231 | } |
| 232 | |
| 233 | void probe_block_sleeprq(void *data, struct request_queue *q, struct bio *bio, int rw) |
| 234 | { |
| 235 | if (bio) { |
| 236 | trace_mark_tp(block, sleeprq_bio, block_sleeprq, |
| 237 | probe_block_sleeprq, |
| 238 | "sector %llu size %u " |
| 239 | "rw(FAILFAST_DRIVER,FAILFAST_TRANSPORT," |
| 240 | "FAILFAST_DEV,DISCARD,META,SYNC,BARRIER,AHEAD,RW) %lX " |
| 241 | "not_uptodate #1u%d", |
| 242 | (unsigned long long)bio->bi_sector, bio->bi_size, |
| 243 | bio->bi_rw, !bio_flagged(bio, BIO_UPTODATE)); |
| 244 | } else { |
| 245 | /* |
| 246 | * FIXME Using a simple trace_mark for the second event |
| 247 | * possibility because tracepoints do not support multiple |
| 248 | * connections to the same probe yet. They should have some |
| 249 | * refcounting. Need to enable both sleeprq_bio and sleeprq |
| 250 | * markers to have the sleeprq marker enabled. |
| 251 | */ |
| 252 | trace_mark(block, sleeprq, "rw %d", rw); |
| 253 | } |
| 254 | } |
| 255 | |
| 256 | void probe_block_plug(void *data, struct request_queue *q) |
| 257 | { |
| 258 | trace_mark_tp(block, plug, block_plug, probe_block_plug, |
| 259 | MARK_NOARGS); |
| 260 | } |
| 261 | |
| 262 | void probe_block_unplug_io(void *data, struct request_queue *q) |
| 263 | { |
| 264 | unsigned int pdu = q->rq.count[READ] + q->rq.count[WRITE]; |
| 265 | |
| 266 | trace_mark_tp(block, unplug_io, block_unplug_io, probe_block_unplug_io, |
| 267 | "pdu %u", pdu); |
| 268 | } |
| 269 | |
| 270 | void probe_block_unplug_timer(void *data, struct request_queue *q) |
| 271 | { |
| 272 | unsigned int pdu = q->rq.count[READ] + q->rq.count[WRITE]; |
| 273 | |
| 274 | trace_mark_tp(block, unplug_timer, block_unplug_timer, |
| 275 | probe_block_unplug_timer, |
| 276 | "pdu %u", pdu); |
| 277 | } |
| 278 | |
| 279 | void probe_block_split(void *data, struct request_queue *q, struct bio *bio, |
| 280 | unsigned int pdu) |
| 281 | { |
| 282 | trace_mark_tp(block, split, block_split, |
| 283 | probe_block_split, |
| 284 | "sector %llu size %u rw(FAILFAST_DRIVER,FAILFAST_TRANSPORT," |
| 285 | "FAILFAST_DEV,DISCARD,META,SYNC,BARRIER,AHEAD,RW) %lX " |
| 286 | "not_uptodate #1u%d pdu %u", |
| 287 | (unsigned long long)bio->bi_sector, bio->bi_size, |
| 288 | bio->bi_rw, !bio_flagged(bio, BIO_UPTODATE), pdu); |
| 289 | } |
| 290 | |
| 291 | void probe_block_remap(void *data, struct request_queue *q, struct bio *bio, |
| 292 | dev_t dev, sector_t from) |
| 293 | { |
| 294 | trace_mark_tp(block, remap, block_remap, |
| 295 | probe_block_remap, |
| 296 | "device_from %lu sector_from %llu device_to %lu " |
| 297 | "size %u rw(FAILFAST_DRIVER,FAILFAST_TRANSPORT," |
| 298 | "FAILFAST_DEV,DISCARD,META,SYNC,BARRIER,AHEAD,RW) %lX " |
| 299 | "not_uptodate #1u%d", |
| 300 | (unsigned long)bio->bi_bdev->bd_dev, |
| 301 | (unsigned long long)from, |
| 302 | (unsigned long)dev, |
| 303 | bio->bi_size, bio->bi_rw, |
| 304 | !bio_flagged(bio, BIO_UPTODATE)); |
| 305 | } |
| 306 | |
| 307 | MODULE_LICENSE("GPL and additional rights"); |
| 308 | MODULE_AUTHOR("Mathieu Desnoyers"); |
| 309 | MODULE_DESCRIPTION("Block Tracepoint Probes"); |