diff options
| author | Bart Van Assche <bart.vanassche@sandisk.com> | 2017-04-26 13:47:56 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2017-04-26 15:09:04 -0600 |
| commit | 2836ee4b1acbe7b396219d0677426885f14cd792 (patch) | |
| tree | 823c705f789aaa2eb68d9c32913b686c55ea60a7 | |
| parent | 8658dca8bd5666f50e02400f844079e520641d8c (diff) | |
| download | linux-2836ee4b1acbe7b396219d0677426885f14cd792.tar.bz2 | |
blk-mq: Add blk_mq_ops.show_rq()
This new callback function will be used in the next patch to show
more information about SCSI requests.
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Omar Sandoval <osandov@fb.com>
Cc: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
| -rw-r--r-- | block/blk-mq-debugfs.c | 6 | ||||
| -rw-r--r-- | include/linux/blk-mq.h | 8 |
2 files changed, 13 insertions, 1 deletions
diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c index ac39093c4ef7..bcd2a7d4a3a5 100644 --- a/block/blk-mq-debugfs.c +++ b/block/blk-mq-debugfs.c @@ -311,6 +311,7 @@ static const char *const rqf_name[] = { static int blk_mq_debugfs_rq_show(struct seq_file *m, void *v) { struct request *rq = list_entry_rq(v); + const struct blk_mq_ops *const mq_ops = rq->q->mq_ops; const unsigned int op = rq->cmd_flags & REQ_OP_MASK; seq_printf(m, "%p {.op=", rq); @@ -324,8 +325,11 @@ static int blk_mq_debugfs_rq_show(struct seq_file *m, void *v) seq_puts(m, ", .rq_flags="); blk_flags_show(m, (__force unsigned int)rq->rq_flags, rqf_name, ARRAY_SIZE(rqf_name)); - seq_printf(m, ", .tag=%d, .internal_tag=%d}\n", rq->tag, + seq_printf(m, ", .tag=%d, .internal_tag=%d", rq->tag, rq->internal_tag); + if (mq_ops->show_rq) + mq_ops->show_rq(m, rq); + seq_puts(m, "}\n"); return 0; } diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index 0c4dadb85f62..32bd8eb5ba67 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -142,6 +142,14 @@ struct blk_mq_ops { reinit_request_fn *reinit_request; map_queues_fn *map_queues; + +#ifdef CONFIG_BLK_DEBUG_FS + /* + * Used by the debugfs implementation to show driver-specific + * information about a request. + */ + void (*show_rq)(struct seq_file *m, struct request *rq); +#endif }; enum { |