diff options
Diffstat (limited to 'module/zfs/zio.c')
| -rw-r--r-- | module/zfs/zio.c | 30 |
1 files changed, 23 insertions, 7 deletions
diff --git a/module/zfs/zio.c b/module/zfs/zio.c index 0ba167c62..9d70b3e59 100644 --- a/module/zfs/zio.c +++ b/module/zfs/zio.c @@ -889,8 +889,8 @@ zio_read_phys(zio_t *pio, vdev_t *vd, uint64_t offset, uint64_t size, ASSERT3U(offset + size, <=, vd->vdev_psize); zio = zio_create(pio, vd->vdev_spa, 0, NULL, data, size, done, private, - ZIO_TYPE_READ, priority, flags, vd, offset, NULL, - ZIO_STAGE_OPEN, ZIO_READ_PHYS_PIPELINE); + ZIO_TYPE_READ, priority, flags | ZIO_FLAG_PHYSICAL, vd, offset, + NULL, ZIO_STAGE_OPEN, ZIO_READ_PHYS_PIPELINE); zio->io_prop.zp_checksum = checksum; @@ -910,8 +910,8 @@ zio_write_phys(zio_t *pio, vdev_t *vd, uint64_t offset, uint64_t size, ASSERT3U(offset + size, <=, vd->vdev_psize); zio = zio_create(pio, vd->vdev_spa, 0, NULL, data, size, done, private, - ZIO_TYPE_WRITE, priority, flags, vd, offset, NULL, - ZIO_STAGE_OPEN, ZIO_WRITE_PHYS_PIPELINE); + ZIO_TYPE_WRITE, priority, flags | ZIO_FLAG_PHYSICAL, vd, offset, + NULL, ZIO_STAGE_OPEN, ZIO_WRITE_PHYS_PIPELINE); zio->io_prop.zp_checksum = checksum; @@ -2642,7 +2642,9 @@ zio_vdev_io_start(zio_t *zio) align = 1ULL << vd->vdev_top->vdev_ashift; - if (P2PHASE(zio->io_size, align) != 0) { + if (!(zio->io_flags & ZIO_FLAG_PHYSICAL) && + P2PHASE(zio->io_size, align) != 0) { + /* Transform logical writes to be a full physical block size. */ uint64_t asize = P2ROUNDUP(zio->io_size, align); char *abuf = zio_buf_alloc(asize); ASSERT(vd == vd->vdev_top); @@ -2653,8 +2655,22 @@ zio_vdev_io_start(zio_t *zio) zio_push_transform(zio, abuf, asize, asize, zio_subblock); } - ASSERT(P2PHASE(zio->io_offset, align) == 0); - ASSERT(P2PHASE(zio->io_size, align) == 0); + /* + * If this is not a physical io, make sure that it is properly aligned + * before proceeding. + */ + if (!(zio->io_flags & ZIO_FLAG_PHYSICAL)) { + ASSERT0(P2PHASE(zio->io_offset, align)); + ASSERT0(P2PHASE(zio->io_size, align)); + } else { + /* + * For physical writes, we allow 512b aligned writes and assume + * the device will perform a read-modify-write as necessary. + */ + ASSERT0(P2PHASE(zio->io_offset, SPA_MINBLOCKSIZE)); + ASSERT0(P2PHASE(zio->io_size, SPA_MINBLOCKSIZE)); + } + VERIFY(zio->io_type != ZIO_TYPE_WRITE || spa_writeable(spa)); /* |