blk-mq: Show operation, cmd_flags and rq_flags names

Show the operation name, .cmd_flags and .rq_flags as names instead
of numbers.

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Omar Sandoval <osandov@fb.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

1 files changed, 69 insertions, 3 deletions

diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c
index ccc7b0f71230..ac39093c4ef7 100644
--- a/block/blk-mq-debugfs.c
+++ b/block/blk-mq-debugfs.c
@@ -253,13 +253,79 @@ static const struct file_operations hctx_flags_fops = {
         .release        = single_release,
 };
 
+static const char *const op_name[] = {
+        [REQ_OP_READ]           = "READ",
+        [REQ_OP_WRITE]          = "WRITE",
+        [REQ_OP_FLUSH]          = "FLUSH",
+        [REQ_OP_DISCARD]        = "DISCARD",
+        [REQ_OP_ZONE_REPORT]    = "ZONE_REPORT",
+        [REQ_OP_SECURE_ERASE]   = "SECURE_ERASE",
+        [REQ_OP_ZONE_RESET]     = "ZONE_RESET",
+        [REQ_OP_WRITE_SAME]     = "WRITE_SAME",
+        [REQ_OP_WRITE_ZEROES]   = "WRITE_ZEROES",
+        [REQ_OP_SCSI_IN]        = "SCSI_IN",
+        [REQ_OP_SCSI_OUT]       = "SCSI_OUT",
+        [REQ_OP_DRV_IN]         = "DRV_IN",
+        [REQ_OP_DRV_OUT]        = "DRV_OUT",
+};
+
+static const char *const cmd_flag_name[] = {
+        [__REQ_FAILFAST_DEV]            = "FAILFAST_DEV",
+        [__REQ_FAILFAST_TRANSPORT]      = "FAILFAST_TRANSPORT",
+        [__REQ_FAILFAST_DRIVER]         = "FAILFAST_DRIVER",
+        [__REQ_SYNC]                    = "SYNC",
+        [__REQ_META]                    = "META",
+        [__REQ_PRIO]                    = "PRIO",
+        [__REQ_NOMERGE]                 = "NOMERGE",
+        [__REQ_IDLE]                    = "IDLE",
+        [__REQ_INTEGRITY]               = "INTEGRITY",
+        [__REQ_FUA]                     = "FUA",
+        [__REQ_PREFLUSH]                = "PREFLUSH",
+        [__REQ_RAHEAD]                  = "RAHEAD",
+        [__REQ_BACKGROUND]              = "BACKGROUND",
+        [__REQ_NR_BITS]                 = "NR_BITS",
+};
+
+static const char *const rqf_name[] = {
+        [ilog2((__force u32)RQF_SORTED)]                = "SORTED",
+        [ilog2((__force u32)RQF_STARTED)]               = "STARTED",
+        [ilog2((__force u32)RQF_QUEUED)]                = "QUEUED",
+        [ilog2((__force u32)RQF_SOFTBARRIER)]           = "SOFTBARRIER",
+        [ilog2((__force u32)RQF_FLUSH_SEQ)]             = "FLUSH_SEQ",
+        [ilog2((__force u32)RQF_MIXED_MERGE)]           = "MIXED_MERGE",
+        [ilog2((__force u32)RQF_MQ_INFLIGHT)]           = "MQ_INFLIGHT",
+        [ilog2((__force u32)RQF_DONTPREP)]              = "DONTPREP",
+        [ilog2((__force u32)RQF_PREEMPT)]               = "PREEMPT",
+        [ilog2((__force u32)RQF_COPY_USER)]             = "COPY_USER",
+        [ilog2((__force u32)RQF_FAILED)]                = "FAILED",
+        [ilog2((__force u32)RQF_QUIET)]                 = "QUIET",
+        [ilog2((__force u32)RQF_ELVPRIV)]               = "ELVPRIV",
+        [ilog2((__force u32)RQF_IO_STAT)]               = "IO_STAT",
+        [ilog2((__force u32)RQF_ALLOCED)]               = "ALLOCED",
+        [ilog2((__force u32)RQF_PM)]                    = "PM",
+        [ilog2((__force u32)RQF_HASHED)]                = "HASHED",
+        [ilog2((__force u32)RQF_STATS)]                 = "STATS",
+        [ilog2((__force u32)RQF_SPECIAL_PAYLOAD)]       = "SPECIAL_PAYLOAD",
+};
+
 static int blk_mq_debugfs_rq_show(struct seq_file *m, void *v)
 {
         struct request *rq = list_entry_rq(v);
+        const unsigned int op = rq->cmd_flags & REQ_OP_MASK;
 
-        seq_printf(m, "%p {.cmd_flags=0x%x, .rq_flags=0x%x, .tag=%d, .internal_tag=%d}\n",
-                   rq, rq->cmd_flags, (__force unsigned int)rq->rq_flags,
-                   rq->tag, rq->internal_tag);
+        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));
+        seq_printf(m, ", .tag=%d, .internal_tag=%d}\n", rq->tag,
+                   rq->internal_tag);
         return 0;
 }