diff options
Diffstat (limited to 'module/zfs/vdev_raidz.c')
| -rw-r--r-- | module/zfs/vdev_raidz.c | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/module/zfs/vdev_raidz.c b/module/zfs/vdev_raidz.c index a21baf9c2..d10d89f3e 100644 --- a/module/zfs/vdev_raidz.c +++ b/module/zfs/vdev_raidz.c @@ -36,6 +36,10 @@ #include <sys/vdev_raidz.h> #include <sys/vdev_raidz_impl.h> +#ifdef ZFS_DEBUG +#include <sys/vdev_initialize.h> /* vdev_xlate testing */ +#endif + /* * Virtual device vector for RAID-Z. * @@ -1627,6 +1631,39 @@ vdev_raidz_child_done(zio_t *zio) rc->rc_skipped = 0; } +static void +vdev_raidz_io_verify(zio_t *zio, raidz_map_t *rm, int col) +{ +#ifdef ZFS_DEBUG + vdev_t *vd = zio->io_vd; + vdev_t *tvd = vd->vdev_top; + + range_seg_t logical_rs, physical_rs; + logical_rs.rs_start = zio->io_offset; + logical_rs.rs_end = logical_rs.rs_start + + vdev_raidz_asize(zio->io_vd, zio->io_size); + + raidz_col_t *rc = &rm->rm_col[col]; + vdev_t *cvd = vd->vdev_child[rc->rc_devidx]; + + vdev_xlate(cvd, &logical_rs, &physical_rs); + ASSERT3U(rc->rc_offset, ==, physical_rs.rs_start); + ASSERT3U(rc->rc_offset, <, physical_rs.rs_end); + /* + * It would be nice to assert that rs_end is equal + * to rc_offset + rc_size but there might be an + * optional I/O at the end that is not accounted in + * rc_size. + */ + if (physical_rs.rs_end > rc->rc_offset + rc->rc_size) { + ASSERT3U(physical_rs.rs_end, ==, rc->rc_offset + + rc->rc_size + (1 << tvd->vdev_ashift)); + } else { + ASSERT3U(physical_rs.rs_end, ==, rc->rc_offset + rc->rc_size); + } +#endif +} + /* * Start an IO operation on a RAIDZ VDev * @@ -1665,6 +1702,12 @@ vdev_raidz_io_start(zio_t *zio) for (c = 0; c < rm->rm_cols; c++) { rc = &rm->rm_col[c]; cvd = vd->vdev_child[rc->rc_devidx]; + + /* + * Verify physical to logical translation. + */ + vdev_raidz_io_verify(zio, rm, c); + zio_nowait(zio_vdev_child_io(zio, NULL, cvd, rc->rc_offset, rc->rc_abd, rc->rc_size, zio->io_type, zio->io_priority, 0, @@ -2323,6 +2366,37 @@ vdev_raidz_need_resilver(vdev_t *vd, uint64_t offset, size_t psize) return (B_FALSE); } +static void +vdev_raidz_xlate(vdev_t *cvd, const range_seg_t *in, range_seg_t *res) +{ + vdev_t *raidvd = cvd->vdev_parent; + ASSERT(raidvd->vdev_ops == &vdev_raidz_ops); + + uint64_t width = raidvd->vdev_children; + uint64_t tgt_col = cvd->vdev_id; + uint64_t ashift = raidvd->vdev_top->vdev_ashift; + + /* make sure the offsets are block-aligned */ + ASSERT0(in->rs_start % (1 << ashift)); + ASSERT0(in->rs_end % (1 << ashift)); + uint64_t b_start = in->rs_start >> ashift; + uint64_t b_end = in->rs_end >> ashift; + + uint64_t start_row = 0; + if (b_start > tgt_col) /* avoid underflow */ + start_row = ((b_start - tgt_col - 1) / width) + 1; + + uint64_t end_row = 0; + if (b_end > tgt_col) + end_row = ((b_end - tgt_col - 1) / width) + 1; + + res->rs_start = start_row << ashift; + res->rs_end = end_row << ashift; + + ASSERT3U(res->rs_start, <=, in->rs_start); + ASSERT3U(res->rs_end - res->rs_start, <=, in->rs_end - in->rs_start); +} + vdev_ops_t vdev_raidz_ops = { vdev_raidz_open, vdev_raidz_close, @@ -2334,6 +2408,7 @@ vdev_ops_t vdev_raidz_ops = { NULL, NULL, NULL, + vdev_raidz_xlate, VDEV_TYPE_RAIDZ, /* name of this vdev type */ B_FALSE /* not a leaf vdev */ }; |