From: Qu Wenruo <wqu@suse.com>
To: linux-btrfs@vger.kernel.org, linux-block@vger.kernel.org,
linux-fsdevel@vger.kernel.org
Subject: [PATCH 2/2] block: Add new BLK_STS_FSCORRUPTED status
Date: Wed, 10 Apr 2019 16:35:08 +0800 [thread overview]
Message-ID: <20190410083508.21091-2-wqu@suse.com> (raw)
In-Reply-To: <20190410083508.21091-1-wqu@suse.com>
There are quite a lot of filesystems doing their verification work done
at endio hook or hook before submitting bio.
Normally such verification returns -EUCLEAN/-EFSCORRUPTED to indicate
something unexpected, and some of such verification either use
bio->bi_status or users bio->bi_endio to return their value.
In such case, the missing of corresponding BLK_STS_ bit can lower
the severity just like:
In endio function:
return errno_to_blk_status(-EFSCORRUPTED);
^^^ -EFSCORRUPTED gets interpreted to BLK_STS_IOERR
In the filesystem code:
ret = blk_status_to_errno(bi->bi_status);
^^^ BLK_STS_IOERR gets interpreted to -EIO;
This lowers the severity, making the filesystem layer to believe it's
just an ordinary error.
This patch will add a new BLK_STS_FSCORRUPTED, to allow -EFSCORRUPTED to
be converted to BLK_STS_FSCORRUPTED, and then converted back to
-EFSCORRUPTED without losing info.
Signed-off-by: Qu Wenruo <wqu@suse.com>
---
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 a55389ba8779..ba7acfc3d8e0 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_FSCORRUPTED] = { -EFSCORRUPTED, "filesystem is corrupted" },
/* 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..8f70bbec6c83 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)
+/* Normally filesystem layer generated error */
+#define BLK_STS_FSCORRUPTED ((__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
next prev parent reply other threads:[~2019-04-10 8:35 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-10 8:35 [PATCH RFC 1/2] errno.h: Export EFSCORRUPTED error number Qu Wenruo
2019-04-10 8:35 ` Qu Wenruo [this message]
2019-04-10 8:55 ` [PATCH 2/2] block: Add new BLK_STS_FSCORRUPTED status Nikolay Borisov
2019-04-10 13:04 ` kbuild test robot
2019-04-10 15:11 ` [PATCH RFC 1/2] errno.h: Export EFSCORRUPTED error number Darrick J. Wong
2019-04-10 15:28 ` Nikolay Borisov
2019-04-11 0:28 ` Qu Wenruo
2019-04-11 1:06 ` Darrick J. Wong
2019-04-11 1:43 ` Qu Wenruo
2019-04-11 1:47 ` Darrick J. Wong
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