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blk-mq: Show symbolic names for hctx state and flags

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Instead of showing the hctx state and flags as numbers, show the
names of the flags.

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: Omar Sandoval <osandov@fb.com>
Cc: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Bart Van Assche 2017-03-30 11:21:27 -07:00 committed by Jens Axboe
parent 91d68905ae
commit f5c0b0910a
1 changed files with 33 additions and 2 deletions
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35
block/blk-mq-debugfs.c
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@ -182,11 +182,19 @@ static const struct file_operations queue_poll_stat_fops = {
.release = single_release,
};
static const char *const hctx_state_name[] = {
[BLK_MQ_S_STOPPED] = "STOPPED",
[BLK_MQ_S_TAG_ACTIVE] = "TAG_ACTIVE",
[BLK_MQ_S_SCHED_RESTART] = "SCHED_RESTART",
[BLK_MQ_S_TAG_WAITING] = "TAG_WAITING",
};
static int hctx_state_show(struct seq_file *m, void *v)
{
struct blk_mq_hw_ctx *hctx = m->private;
seq_printf(m, "0x%lx\n", hctx->state);
blk_flags_show(m, hctx->state, hctx_state_name,
ARRAY_SIZE(hctx_state_name));
return 0;
}
@ -202,11 +210,34 @@ static const struct file_operations hctx_state_fops = {
.release = single_release,
};
static const char *const alloc_policy_name[] = {
[BLK_TAG_ALLOC_FIFO] = "fifo",
[BLK_TAG_ALLOC_RR] = "rr",
};
static const char *const hctx_flag_name[] = {
[ilog2(BLK_MQ_F_SHOULD_MERGE)] = "SHOULD_MERGE",
[ilog2(BLK_MQ_F_TAG_SHARED)] = "TAG_SHARED",
[ilog2(BLK_MQ_F_SG_MERGE)] = "SG_MERGE",
[ilog2(BLK_MQ_F_BLOCKING)] = "BLOCKING",
[ilog2(BLK_MQ_F_NO_SCHED)] = "NO_SCHED",
};
static int hctx_flags_show(struct seq_file *m, void *v)
{
struct blk_mq_hw_ctx *hctx = m->private;
const int alloc_policy = BLK_MQ_FLAG_TO_ALLOC_POLICY(hctx->flags);
seq_printf(m, "0x%lx\n", hctx->flags);
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));
return 0;
}