[PATCH v3 02/18] block: introduce BLK_STS_DURATION_LIMIT

Niklas Cassel
2023-01-24T19:03:34Z

From: Damien Le Moal <damien.lemoal@opensource.wdc.com>

Introduce the new block IO status BLK_STS_DURATION_LIMIT for LLDDs to
report command that failed due to a command duration limit being
exceeded. This new status is mapped to the ETIME error code to allow
users to differentiate "soft" duration limit failures from other more
serious hardware related errors.

Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Co-developed-by: Niklas Cassel <niklas.cassel@wdc.com>
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
block/blk-core.c | 3 +++
include/linux/blk_types.h | 6 ++++++
2 files changed, 9 insertions(+)

diff --git a/block/blk-core.c b/block/blk-core.c
index 46d12b3344c9..9ca31b779fc1 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -170,6 +170,9 @@ static const struct {
[BLK_STS_ZONE_OPEN_RESOURCE] = { -ETOOMANYREFS, "open zones exceeded" },
[BLK_STS_ZONE_ACTIVE_RESOURCE] = { -EOVERFLOW, "active zones exceeded" },

+ /* Command duration limit device-side timeout */
+ [BLK_STS_DURATION_LIMIT] = { -ETIME, "duration limit exceeded" },
+
/* everything else not covered above: */
[BLK_STS_IOERR] = { -EIO, "I/O" },
};
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index 99be590f952f..cde997590765 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -166,6 +166,12 @@ typedef u16 blk_short_t;
*/
#define BLK_STS_OFFLINE ((__force blk_status_t)17)

+/*
+ * BLK_STS_DURATION_LIMIT is returned from the driver when the target device
+ * aborted the command because it exceeded one of its Command Duration Limits.
+ */
+#define BLK_STS_DURATION_LIMIT ((__force blk_status_t)18)
+
/**
* blk_path_error - returns true if error may be path related
* @error: status the request was completed with
--
2.39.1