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| author | Sagi Grimberg <sagig@mellanox.com> | 2015-09-08 09:33:35 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2015-09-11 09:03:45 -0600 |
| commit | 87a816df537e096d404add543ef47b796906c130 (patch) | |
| tree | ae4d2c8c2606303f9ff4407a748fb48a111b7520 /block/bio-integrity.c | |
| parent | 7f39add3b08cbbdb99abe50e6d7c342e6800d684 (diff) | |
| download | linux-0-day-87a816df537e096d404add543ef47b796906c130.tar.gz linux-0-day-87a816df537e096d404add543ef47b796906c130.tar.xz | |
block: Refuse adding appending a gapped integrity page to a bio
This is only theoretical at the moment given that the only
subsystems that generate integrity payloads are the block layer
itself and the scsi target (which generate well aligned integrity
payloads). But when we will expose integrity meta-data to user-space,
we'll need to refuse appending a page with a gap (if the queue
virtual boundary is set).
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/bio-integrity.c')
| -rw-r--r-- | block/bio-integrity.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/block/bio-integrity.c b/block/bio-integrity.c index 4aecca79374ad..14b8faf8b09d4 100644 --- a/block/bio-integrity.c +++ b/block/bio-integrity.c @@ -140,6 +140,11 @@ int bio_integrity_add_page(struct bio *bio, struct page *page, iv = bip->bip_vec + bip->bip_vcnt; + if (bip->bip_vcnt && + bvec_gap_to_prev(bdev_get_queue(bio->bi_bdev), + &bip->bip_vec[bip->bip_vcnt - 1], offset)) + return 0; + iv->bv_page = page; iv->bv_len = len; iv->bv_offset = offset; |