diff options
| -rw-r--r-- | block/blk-core.c | 28 | ||||
| -rw-r--r-- | block/blk.h | 2 |
2 files changed, 30 insertions, 0 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index 43121a9f99f0..842b5c6f2fb4 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -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 diff --git a/block/blk.h b/block/blk.h index 7fdfb9012ce1..3ab2cdd6ed12 100644 --- a/block/blk.h +++ b/block/blk.h @@ -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); |