block: add a str_to_blk_op helper

Add a helper to find the REQ_OP_XYZ constant from the "XYZ" string.
This will be used for the error injection debugfs interface.

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/20260611140703.2401204-4-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/block/blk-core.c b/block/blk-core.c
index 842b5c6f2fb4537e890f7ff0d1880f1e9990a5df..beaab7a71fba7c42635d5d9ed2518b4956b04c18 100644 (file)
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -132,6 +132,16 @@ inline const char *blk_op_str(enum req_op op)
 }
 EXPORT_SYMBOL_GPL(blk_op_str);
 
+enum req_op str_to_blk_op(const char *op)
+{
+       int i;
+
+       for (i = 0; i < ARRAY_SIZE(blk_op_name); i++)
+               if (blk_op_name[i] && !strcmp(blk_op_name[i], op))
+                       return (enum req_op)i;
+       return REQ_OP_LAST;
+}
+
 #define ENT(_tag, _errno, _desc)       \
 [BLK_STS_##_tag] = {                           \
        .errno          = _errno,               \

diff --git a/block/blk.h b/block/blk.h
index 3ab2cdd6ed12074cf21b05864b998d5697e514e5..507ab34a6e90ac4318403e0c7891072a7be4683f 100644 (file)
--- a/block/blk.h
+++ b/block/blk.h
@@ -53,6 +53,7 @@ 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);
+enum req_op str_to_blk_op(const char *op);
 
 bool __blk_mq_unfreeze_queue(struct request_queue *q, bool force_atomic);
 bool blk_queue_start_drain(struct request_queue *q);