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block: add a "tag" for block status codes

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The full name of the status codes is not good for user interfaces as it
can contain white spaces.  Add the name of the status code without the
BLK_STS_ prefix as a tag so that it can be used for user interfaces.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@kernel.org>
Reviewed-by: Md Haris Iqbal <haris.iqbal@linux.dev>
Link: https://patch.msgid.link/20260611140703.2401204-3-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig
2026-06-11 16:06:45 +02:00
committed by Jens Axboe
parent 8c8ebed165
commit ce351560b7
2 changed files with 30 additions and 0 deletions
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28
block/blk-core.c
View File

@@ -135,10 +135,12 @@ EXPORT_SYMBOL_GPL(blk_op_str);
#define ENT(_tag, _errno, _desc) \
[BLK_STS_##_tag] = { \
.errno = _errno, \
.tag = __stringify(_tag), \
.name = _desc, \
}
static const struct {
int errno;
const char *tag;
const char *name;
} blk_errors[] = {
ENT(OK, 0, ""),
@@ -203,6 +205,32 @@ const char *blk_status_to_str(blk_status_t status)
return blk_errors[idx].name;
}
const char *blk_status_to_tag(blk_status_t status)
{
int idx = (__force int)status;
if (WARN_ON_ONCE(idx >= ARRAY_SIZE(blk_errors) || !blk_errors[idx].tag))
return "<null>";
return blk_errors[idx].tag;
}
blk_status_t tag_to_blk_status(const char *tag)
{
int i;
for (i = 0; i < ARRAY_SIZE(blk_errors); i++) {
if (blk_errors[i].tag &&
!strcmp(blk_errors[i].tag, tag))
return (__force blk_status_t)i;
}
/*
* Return BLK_STS_OK for mismatches as this function is intended to
* parse error status values.
*/
return BLK_STS_OK;
}
/**
* blk_sync_queue - cancel any pending callbacks on a queue
* @q: the queue

2
block/blk.h
View File

@@ -51,6 +51,8 @@ struct blk_flush_queue *blk_alloc_flush_queue(int node, int cmd_size,
void blk_free_flush_queue(struct blk_flush_queue *q);
const char *blk_status_to_str(blk_status_t status);
const char *blk_status_to_tag(blk_status_t status);
blk_status_t tag_to_blk_status(const char *tag);
bool __blk_mq_unfreeze_queue(struct request_queue *q, bool force_atomic);
bool blk_queue_start_drain(struct request_queue *q);