diff options
Diffstat (limited to 'fs/btrfs/scrub.c')
| -rw-r--r-- | fs/btrfs/scrub.c | 59 |
1 files changed, 45 insertions, 14 deletions
diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c index adaf8ab694d5..016a025e36c7 100644 --- a/fs/btrfs/scrub.c +++ b/fs/btrfs/scrub.c @@ -647,13 +647,9 @@ static int scrub_print_warning_inode(u64 inum, u64 offset, u64 root, struct btrfs_fs_info *fs_info = swarn->dev->fs_info; struct inode_fs_paths *ipath = NULL; struct btrfs_root *local_root; - struct btrfs_key root_key; struct btrfs_key key; - root_key.objectid = root; - root_key.type = BTRFS_ROOT_ITEM_KEY; - root_key.offset = (u64)-1; - local_root = btrfs_get_fs_root(fs_info, &root_key, true); + local_root = btrfs_get_fs_root(fs_info, root, true); if (IS_ERR(local_root)) { ret = PTR_ERR(local_root); goto err; @@ -3046,7 +3042,8 @@ out: static noinline_for_stack int scrub_stripe(struct scrub_ctx *sctx, struct map_lookup *map, struct btrfs_device *scrub_dev, - int num, u64 base, u64 length) + int num, u64 base, u64 length, + struct btrfs_block_group *cache) { struct btrfs_path *path, *ppath; struct btrfs_fs_info *fs_info = sctx->fs_info; @@ -3284,6 +3281,20 @@ static noinline_for_stack int scrub_stripe(struct scrub_ctx *sctx, break; } + /* + * If our block group was removed in the meanwhile, just + * stop scrubbing since there is no point in continuing. + * Continuing would prevent reusing its device extents + * for new block groups for a long time. + */ + spin_lock(&cache->lock); + if (cache->removed) { + spin_unlock(&cache->lock); + ret = 0; + goto out; + } + spin_unlock(&cache->lock); + extent = btrfs_item_ptr(l, slot, struct btrfs_extent_item); flags = btrfs_extent_flags(l, extent); @@ -3328,13 +3339,14 @@ again: &extent_dev, &extent_mirror_num); - ret = btrfs_lookup_csums_range(csum_root, - extent_logical, - extent_logical + - extent_len - 1, - &sctx->csum_list, 1); - if (ret) - goto out; + if (flags & BTRFS_EXTENT_FLAG_DATA) { + ret = btrfs_lookup_csums_range(csum_root, + extent_logical, + extent_logical + extent_len - 1, + &sctx->csum_list, 1); + if (ret) + goto out; + } ret = scrub_extent(sctx, map, extent_logical, extent_len, extent_physical, extent_dev, flags, @@ -3457,7 +3469,7 @@ static noinline_for_stack int scrub_chunk(struct scrub_ctx *sctx, if (map->stripes[i].dev->bdev == scrub_dev->bdev && map->stripes[i].physical == dev_offset) { ret = scrub_stripe(sctx, map, scrub_dev, i, - chunk_offset, length); + chunk_offset, length, cache); if (ret) goto out; } @@ -3555,6 +3567,23 @@ int scrub_enumerate_chunks(struct scrub_ctx *sctx, goto skip; /* + * Make sure that while we are scrubbing the corresponding block + * group doesn't get its logical address and its device extents + * reused for another block group, which can possibly be of a + * different type and different profile. We do this to prevent + * false error detections and crashes due to bogus attempts to + * repair extents. + */ + spin_lock(&cache->lock); + if (cache->removed) { + spin_unlock(&cache->lock); + btrfs_put_block_group(cache); + goto skip; + } + btrfs_freeze_block_group(cache); + spin_unlock(&cache->lock); + + /* * we need call btrfs_inc_block_group_ro() with scrubs_paused, * to avoid deadlock caused by: * btrfs_inc_block_group_ro() @@ -3609,6 +3638,7 @@ int scrub_enumerate_chunks(struct scrub_ctx *sctx, } else { btrfs_warn(fs_info, "failed setting block group ro: %d", ret); + btrfs_unfreeze_block_group(cache); btrfs_put_block_group(cache); scrub_pause_off(fs_info); break; @@ -3695,6 +3725,7 @@ int scrub_enumerate_chunks(struct scrub_ctx *sctx, spin_unlock(&cache->lock); } + btrfs_unfreeze_block_group(cache); btrfs_put_block_group(cache); if (ret) break; |