Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 5.4 154/184] md/raid1: properly indicate failure when ending a failed write request | Date | Mon, 10 May 2021 12:20:48 +0200 |
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From: Paul Clements <paul.clements@us.sios.com>
commit 2417b9869b81882ab90fd5ed1081a1cb2d4db1dd upstream.
This patch addresses a data corruption bug in raid1 arrays using bitmaps. Without this fix, the bitmap bits for the failed I/O end up being cleared.
Since we are in the failure leg of raid1_end_write_request, the request either needs to be retried (R1BIO_WriteError) or failed (R1BIO_Degraded).
Fixes: eeba6809d8d5 ("md/raid1: end bio when the device faulty") Cc: stable@vger.kernel.org # v5.2+ Signed-off-by: Paul Clements <paul.clements@us.sios.com> Signed-off-by: Song Liu <song@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/md/raid1.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -458,6 +458,8 @@ static void raid1_end_write_request(stru if (!test_bit(Faulty, &rdev->flags)) set_bit(R1BIO_WriteError, &r1_bio->state); else { + /* Fail the request */ + set_bit(R1BIO_Degraded, &r1_bio->state); /* Finished with this branch */ r1_bio->bios[mirror] = NULL; to_put = bio;
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