diff options
| author | Martin K. Petersen <martin.petersen@oracle.com> | 2010-10-15 15:49:20 +0200 |
|---|---|---|
| committer | Jens Axboe <jaxboe@fusionio.com> | 2010-10-15 15:49:20 +0200 |
| commit | 495d2b3883682fcd1c3dee3a45e38fd00154ae25 (patch) | |
| tree | 1d2f76a70fc1c5edbb39769e675b9e468a346d5e /drivers/scsi/sd_dif.c | |
| parent | block: Fix double free in blk_integrity_unregister (diff) | |
| download | linux-495d2b3883682fcd1c3dee3a45e38fd00154ae25.tar.xz linux-495d2b3883682fcd1c3dee3a45e38fd00154ae25.zip | |
block: Make the integrity mapped property a bio flag
Previously we tracked whether the integrity metadata had been remapped
using a request flag. This was fine for low-level retries. However, if
an I/O was redriven by upper layers we would end up remapping again,
causing the retry to fail.
Deprecate the REQ_INTEGRITY flag and introduce BIO_MAPPED_INTEGRITY
which enables filesystems to notify lower layers that the bio in
question has already been remapped.
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'drivers/scsi/sd_dif.c')
| -rw-r--r-- | drivers/scsi/sd_dif.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/drivers/scsi/sd_dif.c b/drivers/scsi/sd_dif.c index 84be62149c6c..0cb39ff21171 100644 --- a/drivers/scsi/sd_dif.c +++ b/drivers/scsi/sd_dif.c @@ -375,21 +375,20 @@ int sd_dif_prepare(struct request *rq, sector_t hw_sector, unsigned int sector_s unsigned int i, j; u32 phys, virt; - /* Already remapped? */ - if (rq->cmd_flags & REQ_INTEGRITY) - return 0; - sdkp = rq->bio->bi_bdev->bd_disk->private_data; if (sdkp->protection_type == SD_DIF_TYPE3_PROTECTION) return 0; - rq->cmd_flags |= REQ_INTEGRITY; phys = hw_sector & 0xffffffff; __rq_for_each_bio(bio, rq) { struct bio_vec *iv; + /* Already remapped? */ + if (bio_flagged(bio, BIO_MAPPED_INTEGRITY)) + break; + virt = bio->bi_integrity->bip_sector & 0xffffffff; bip_for_each_vec(iv, bio->bi_integrity, i) { @@ -408,6 +407,8 @@ int sd_dif_prepare(struct request *rq, sector_t hw_sector, unsigned int sector_s kunmap_atomic(sdt, KM_USER0); } + + bio->bi_flags |= BIO_MAPPED_INTEGRITY; } return 0; |