diff options
Diffstat (limited to 'fs/btrfs')
| -rw-r--r-- | fs/btrfs/disk-io.c | 20 | ||||
| -rw-r--r-- | fs/btrfs/tests/qgroup-tests.c | 2 |
2 files changed, 8 insertions, 14 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 831755a867ce..3a6d35e1edb7 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -1601,22 +1601,11 @@ again: if (ret == 0) set_bit(BTRFS_ROOT_ORPHAN_ITEM_INSERTED, &root->state); - /* - * All roots have two refs on them at all times, one for the mounted fs, - * and one for being in the radix tree. This way we only free the root - * when we are unmounting or deleting the subvolume. We get one ref - * from __setup_root, one for inserting it into the radix tree, and then - * we have the third for returning it, and the caller will put it when - * it's done with the root. - */ - btrfs_grab_root(root); ret = btrfs_insert_fs_root(fs_info, root); if (ret) { btrfs_put_root(root); - if (ret == -EEXIST) { - btrfs_put_root(root); + if (ret == -EEXIST) goto again; - } goto fail; } return root; @@ -3904,11 +3893,13 @@ int write_all_supers(struct btrfs_fs_info *fs_info, int max_mirrors) void btrfs_drop_and_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root) { + bool drop_ref = false; + spin_lock(&fs_info->fs_roots_radix_lock); radix_tree_delete(&fs_info->fs_roots_radix, (unsigned long)root->root_key.objectid); if (test_and_clear_bit(BTRFS_ROOT_IN_RADIX, &root->state)) - btrfs_put_root(root); + drop_ref = true; spin_unlock(&fs_info->fs_roots_radix_lock); if (btrfs_root_refs(&root->root_item) == 0) @@ -3930,7 +3921,8 @@ void btrfs_drop_and_free_fs_root(struct btrfs_fs_info *fs_info, iput(root->ino_cache_inode); root->ino_cache_inode = NULL; } - btrfs_put_root(root); + if (drop_ref) + btrfs_put_root(root); } int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info) diff --git a/fs/btrfs/tests/qgroup-tests.c b/fs/btrfs/tests/qgroup-tests.c index ac035a6fa003..ce1ca8e73c2d 100644 --- a/fs/btrfs/tests/qgroup-tests.c +++ b/fs/btrfs/tests/qgroup-tests.c @@ -507,6 +507,7 @@ int btrfs_test_qgroups(u32 sectorsize, u32 nodesize) test_err("couldn't insert fs root %d", ret); goto out; } + btrfs_put_root(tmp_root); tmp_root = btrfs_alloc_dummy_root(fs_info); if (IS_ERR(tmp_root)) { @@ -521,6 +522,7 @@ int btrfs_test_qgroups(u32 sectorsize, u32 nodesize) test_err("couldn't insert fs root %d", ret); goto out; } + btrfs_put_root(tmp_root); test_msg("running qgroup tests"); ret = test_no_shared_qgroup(root, sectorsize, nodesize); |