There are a lot of end_io hooks which can do some self test at
read/write time.
Normally such selftest should return -EUCLEAN to indicate something
unexpected.
However there is no BLK_STS_* bit for that, this makes every selftest
error to be interpreted to EIO, which lowers the severity.
This patch will add a new BLK_STS_SELFTEST, to allow the error from
endio to be passed to filesystem.
Signed-off-by: Qu Wenruo <wqu@xxxxxxxx>
---
block/blk-core.c | 1 +
include/linux/blk_types.h | 3 +++
2 files changed, 4 insertions(+)
diff --git a/block/blk-core.c b/block/blk-core.c
index 4673ebe42255..66967642a5ef 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -135,6 +135,7 @@ static const struct {
[BLK_STS_RESOURCE] = { -ENOMEM, "kernel resource" },
[BLK_STS_DEV_RESOURCE] = { -EBUSY, "device resource" },
[BLK_STS_AGAIN] = { -EAGAIN, "nonblocking retry" },
+ [BLK_STS_SELFTEST] = { -EUCLEAN, "filesystem selftest" },
/* device mapper special case, should not leak out: */
[BLK_STS_DM_REQUEUE] = { -EREMCHG, "dm internal retry" },
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index 791fee35df88..5bba24c3753c 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -63,6 +63,9 @@ typedef u8 __bitwise blk_status_t;
*/
#define BLK_STS_DEV_RESOURCE ((__force blk_status_t)13)
+/* Filesystem selftest error */
+#define BLK_STS_SELFTEST ((__force blk_status_t)14)
+
/**
* blk_path_error - returns true if error may be path related
* @error: status the request was completed with
--
2.21.0
