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-rw-r--r--fs/btrfs/relocation.c23
1 files changed, 19 insertions, 4 deletions
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index f65595602aa8..d35936c934ab 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -611,8 +611,8 @@ static int should_ignore_root(struct btrfs_root *root)
if (!reloc_root)
return 0;
- if (btrfs_root_last_snapshot(&reloc_root->root_item) ==
- root->fs_info->running_transaction->transid - 1)
+ if (btrfs_header_generation(reloc_root->commit_root) ==
+ root->fs_info->running_transaction->transid)
return 0;
/*
* if there is reloc tree and it was created in previous
@@ -1527,8 +1527,7 @@ int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
int clear_rsv = 0;
int ret;
- if (!rc || !rc->create_reloc_tree ||
- root->root_key.objectid == BTRFS_TREE_RELOC_OBJECTID)
+ if (!rc)
return 0;
/*
@@ -1538,12 +1537,28 @@ int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
if (reloc_root_is_dead(root))
return 0;
+ /*
+ * This is subtle but important. We do not do
+ * record_root_in_transaction for reloc roots, instead we record their
+ * corresponding fs root, and then here we update the last trans for the
+ * reloc root. This means that we have to do this for the entire life
+ * of the reloc root, regardless of which stage of the relocation we are
+ * in.
+ */
if (root->reloc_root) {
reloc_root = root->reloc_root;
reloc_root->last_trans = trans->transid;
return 0;
}
+ /*
+ * We are merging reloc roots, we do not need new reloc trees. Also
+ * reloc trees never need their own reloc tree.
+ */
+ if (!rc->create_reloc_tree ||
+ root->root_key.objectid == BTRFS_TREE_RELOC_OBJECTID)
+ return 0;
+
if (!trans->reloc_reserved) {
rsv = trans->block_rsv;
trans->block_rsv = rc->block_rsv;