diff options
| -rw-r--r-- | fs/btrfs/scrub.c | 41 |
1 files changed, 29 insertions, 12 deletions
diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c index 8381174bda15..6aabce141d65 100644 --- a/fs/btrfs/scrub.c +++ b/fs/btrfs/scrub.c @@ -175,6 +175,7 @@ struct scrub_ctx { struct scrub_stripe stripes[SCRUB_STRIPES_PER_SCTX]; struct scrub_stripe *raid56_data_stripes; struct btrfs_fs_info *fs_info; + struct btrfs_path extent_path; int first_free; int cur_stripe; atomic_t cancel_req; @@ -339,6 +340,8 @@ static noinline_for_stack struct scrub_ctx *scrub_setup_ctx( refcount_set(&sctx->refs, 1); sctx->is_dev_replace = is_dev_replace; sctx->fs_info = fs_info; + sctx->extent_path.search_commit_root = 1; + sctx->extent_path.skip_locking = 1; for (i = 0; i < SCRUB_STRIPES_PER_SCTX; i++) { int ret; @@ -1467,6 +1470,7 @@ static void scrub_stripe_reset_bitmaps(struct scrub_stripe *stripe) * Return <0 for error. */ static int scrub_find_fill_first_stripe(struct btrfs_block_group *bg, + struct btrfs_path *extent_path, struct btrfs_device *dev, u64 physical, int mirror_num, u64 logical_start, u32 logical_len, @@ -1476,7 +1480,6 @@ static int scrub_find_fill_first_stripe(struct btrfs_block_group *bg, struct btrfs_root *extent_root = btrfs_extent_root(fs_info, bg->start); struct btrfs_root *csum_root = btrfs_csum_root(fs_info, bg->start); const u64 logical_end = logical_start + logical_len; - struct btrfs_path path = { 0 }; u64 cur_logical = logical_start; u64 stripe_end; u64 extent_start; @@ -1492,14 +1495,13 @@ static int scrub_find_fill_first_stripe(struct btrfs_block_group *bg, /* The range must be inside the bg. */ ASSERT(logical_start >= bg->start && logical_end <= bg->start + bg->length); - path.search_commit_root = 1; - path.skip_locking = 1; - - ret = find_first_extent_item(extent_root, &path, logical_start, logical_len); + ret = find_first_extent_item(extent_root, extent_path, logical_start, + logical_len); /* Either error or not found. */ if (ret) goto out; - get_extent_info(&path, &extent_start, &extent_len, &extent_flags, &extent_gen); + get_extent_info(extent_path, &extent_start, &extent_len, &extent_flags, + &extent_gen); if (extent_flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) stripe->nr_meta_extents++; if (extent_flags & BTRFS_EXTENT_FLAG_DATA) @@ -1527,7 +1529,7 @@ static int scrub_find_fill_first_stripe(struct btrfs_block_group *bg, /* Fill the extent info for the remaining sectors. */ while (cur_logical <= stripe_end) { - ret = find_first_extent_item(extent_root, &path, cur_logical, + ret = find_first_extent_item(extent_root, extent_path, cur_logical, stripe_end - cur_logical + 1); if (ret < 0) goto out; @@ -1535,7 +1537,7 @@ static int scrub_find_fill_first_stripe(struct btrfs_block_group *bg, ret = 0; break; } - get_extent_info(&path, &extent_start, &extent_len, + get_extent_info(extent_path, &extent_start, &extent_len, &extent_flags, &extent_gen); if (extent_flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) stripe->nr_meta_extents++; @@ -1575,7 +1577,6 @@ static int scrub_find_fill_first_stripe(struct btrfs_block_group *bg, } set_bit(SCRUB_STRIPE_FLAG_INITIALIZED, &stripe->state); out: - btrfs_release_path(&path); return ret; } @@ -1765,8 +1766,9 @@ static int queue_scrub_stripe(struct scrub_ctx *sctx, struct btrfs_block_group * /* We can queue one stripe using the remaining slot. */ scrub_reset_stripe(stripe); - ret = scrub_find_fill_first_stripe(bg, dev, physical, mirror_num, - logical, length, stripe); + ret = scrub_find_fill_first_stripe(bg, &sctx->extent_path, dev, + physical, mirror_num, logical, + length, stripe); /* Either >0 as no more extents or <0 for error. */ if (ret) return ret; @@ -1784,6 +1786,7 @@ static int scrub_raid56_parity_stripe(struct scrub_ctx *sctx, struct btrfs_fs_info *fs_info = sctx->fs_info; struct btrfs_raid_bio *rbio; struct btrfs_io_context *bioc = NULL; + struct btrfs_path extent_path = { 0 }; struct bio *bio; struct scrub_stripe *stripe; bool all_empty = true; @@ -1794,6 +1797,14 @@ static int scrub_raid56_parity_stripe(struct scrub_ctx *sctx, ASSERT(sctx->raid56_data_stripes); + /* + * For data stripe search, we cannot re-use the same extent path, as + * the data stripe bytenr may be smaller than previous extent. Thus we + * have to use our own extent path. + */ + extent_path.search_commit_root = 1; + extent_path.skip_locking = 1; + for (int i = 0; i < data_stripes; i++) { int stripe_index; int rot; @@ -1808,7 +1819,7 @@ static int scrub_raid56_parity_stripe(struct scrub_ctx *sctx, scrub_reset_stripe(stripe); set_bit(SCRUB_STRIPE_FLAG_NO_REPORT, &stripe->state); - ret = scrub_find_fill_first_stripe(bg, + ret = scrub_find_fill_first_stripe(bg, &extent_path, map->stripes[stripe_index].dev, physical, 1, full_stripe_start + btrfs_stripe_nr_to_offset(i), BTRFS_STRIPE_LEN, stripe); @@ -1936,6 +1947,7 @@ static int scrub_raid56_parity_stripe(struct scrub_ctx *sctx, bio_put(bio); btrfs_bio_counter_dec(fs_info); + btrfs_release_path(&extent_path); out: return ret; } @@ -2103,6 +2115,9 @@ static noinline_for_stack int scrub_stripe(struct scrub_ctx *sctx, u64 stripe_logical; int stop_loop = 0; + /* Extent_path should be released by now. */ + ASSERT(sctx->extent_path.nodes[0] == NULL); + scrub_blocked_if_needed(fs_info); if (sctx->is_dev_replace && @@ -2221,6 +2236,8 @@ out: ret2 = flush_scrub_stripes(sctx); if (!ret) ret = ret2; + btrfs_release_path(&sctx->extent_path); + if (sctx->raid56_data_stripes) { for (int i = 0; i < nr_data_stripes(map); i++) release_scrub_stripe(&sctx->raid56_data_stripes[i]); |