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| author | Nicolai Stange <nicstange@gmail.com> | 2016-12-04 14:56:39 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2016-12-05 15:54:39 +0100 |
| commit | 58886785db318588f95c8036abb2a47016c1f14c (patch) | |
| tree | 89095602dbb2203899f9e32659c145308bba0608 /block/blk-core.c | |
| parent | nbd: fix 64-bit division (diff) | |
| download | linux-58886785db318588f95c8036abb2a47016c1f14c.tar.xz linux-58886785db318588f95c8036abb2a47016c1f14c.zip | |
block: fix unintended fallthrough in generic_make_request_checks()
Since commit e73c23ff736e ("block: add async variant of
blkdev_issue_zeroout") messages like the following show up:
EXT4-fs (dm-1): Delayed block allocation failed for inode 2368848 at
logical offset 0 with max blocks 1 with error 95
EXT4-fs (dm-1): This should not happen!! Data will be lost
Due to the following fallthrough introduced with
commit 2d253440b5af ("block: Define zoned block device operations"),
generic_make_request_checks() would accept a REQ_OP_WRITE_SAME bio only
if the block device supports "write same" *and* is a zoned one:
switch (bio_op(bio)) {
[...]
case REQ_OP_WRITE_SAME:
if (!bdev_write_same(bio->bi_bdev))
goto not_supported;
case REQ_OP_ZONE_REPORT:
case REQ_OP_ZONE_RESET:
if (!bdev_is_zoned(bio->bi_bdev))
goto not_supported;
break;
[...]
}
Thus, although the bio setup as done by __blkdev_issue_write_same() from
commit e73c23ff736e ("block: add async variant of blkdev_issue_zeroout")
would succeed, its actual submission would not, resulting in the
EOPNOTSUPP == 95.
Fix this by removing the fallthrough which, due to the lack of an explicit
comment, seems to be unintended anyway.
Fixes: e73c23ff736e ("block: add async variant of blkdev_issue_zeroout")
Fixes: 2d253440b5af ("block: Define zoned block device operations")
Signed-off-by: Nicolai Stange <nicstange@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-core.c')
| -rw-r--r-- | block/blk-core.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index 3f2eb8d80189..4b7ec5958055 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -1945,6 +1945,7 @@ generic_make_request_checks(struct bio *bio) case REQ_OP_WRITE_SAME: if (!bdev_write_same(bio->bi_bdev)) goto not_supported; + break; case REQ_OP_ZONE_REPORT: case REQ_OP_ZONE_RESET: if (!bdev_is_zoned(bio->bi_bdev)) |