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| author | Martin K. Petersen <[email protected]> | 2015-07-22 11:57:12 +0000 |
|---|---|---|
| committer | Jens Axboe <[email protected]> | 2015-07-23 22:21:34 +0000 |
| commit | f3f5da624e0a891c34d8cd513c57f1d9b0c7dadc (patch) | |
| tree | d2a92a8d8d03287c8b51df5dfae24d267e151e6b /net/switchdev/switchdev.c | |
| parent | block: export bio_associate_*() and wbc_account_io() (diff) | |
| download | kernel-f3f5da624e0a891c34d8cd513c57f1d9b0c7dadc.tar.gz kernel-f3f5da624e0a891c34d8cd513c57f1d9b0c7dadc.zip | |
block: Do a full clone when splitting discard bios
This fixes a data corruption bug when using discard on top of MD linear,
raid0 and raid10 personalities.
Commit 20d0189b1012 "block: Introduce new bio_split()" permits sharing
the bio_vec between the two resulting bios. That is fine for read/write
requests where the bio_vec is immutable. For discards, however, we need
to be able to attach a payload and update the bio_vec so the page can
get mapped to a scatterlist entry. Therefore the bio_vec can not be
shared when splitting discards and we must do a full clone.
Signed-off-by: Martin K. Petersen <[email protected]>
Reported-by: Seunguk Shin <[email protected]>
Tested-by: Seunguk Shin <[email protected]>
Cc: Seunguk Shin <[email protected]>
Cc: Jens Axboe <[email protected]>
Cc: Kent Overstreet <[email protected]>
Cc: <[email protected]> # v3.14+
Reviewed-by: Christoph Hellwig <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
Diffstat (limited to 'net/switchdev/switchdev.c')
0 files changed, 0 insertions, 0 deletions