diff options
Diffstat (limited to 'fs/btrfs/backref.c')
| -rw-r--r-- | fs/btrfs/backref.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c index af98421e7922..0428557fd77b 100644 --- a/fs/btrfs/backref.c +++ b/fs/btrfs/backref.c @@ -1393,6 +1393,13 @@ static int find_parent_nodes(struct btrfs_backref_walk_ctx *ctx, .indirect_missing_keys = PREFTREE_INIT }; + if (unlikely(!root)) { + btrfs_err(ctx->fs_info, + "missing extent root for extent at bytenr %llu", + ctx->bytenr); + return -EUCLEAN; + } + /* Roots ulist is not needed when using a sharedness check context. */ if (sc) ASSERT(ctx->roots == NULL); @@ -2204,6 +2211,13 @@ int extent_from_logical(struct btrfs_fs_info *fs_info, u64 logical, struct btrfs_extent_item *ei; struct btrfs_key key; + if (unlikely(!extent_root)) { + btrfs_err(fs_info, + "missing extent root for extent at bytenr %llu", + logical); + return -EUCLEAN; + } + key.objectid = logical; if (btrfs_fs_incompat(fs_info, SKINNY_METADATA)) key.type = BTRFS_METADATA_ITEM_KEY; @@ -2851,6 +2865,13 @@ int btrfs_backref_iter_start(struct btrfs_backref_iter *iter, u64 bytenr) struct btrfs_key key; int ret; + if (unlikely(!extent_root)) { + btrfs_err(fs_info, + "missing extent root for extent at bytenr %llu", + bytenr); + return -EUCLEAN; + } + key.objectid = bytenr; key.type = BTRFS_METADATA_ITEM_KEY; key.offset = (u64)-1; @@ -2987,6 +3008,13 @@ int btrfs_backref_iter_next(struct btrfs_backref_iter *iter) /* We're at keyed items, there is no inline item, go to the next one */ extent_root = btrfs_extent_root(iter->fs_info, iter->bytenr); + if (unlikely(!extent_root)) { + btrfs_err(iter->fs_info, + "missing extent root for extent at bytenr %llu", + iter->bytenr); + return -EUCLEAN; + } + ret = btrfs_next_item(extent_root, iter->path); if (ret) return ret; |