diff options
author | Qu Wenruo <wqu@suse.com> | 2018-07-05 15:37:28 +0800 |
---|---|---|
committer | David Sterba <dsterba@suse.com> | 2018-08-06 15:04:58 +0200 |
commit | 5f594c3ce3cd5158d16f80db576ae84d69bc0636 (patch) | |
tree | 882fd12f259a05351591dbd2d6393c6789deaa40 | |
parent | a4770b0a013e5934461d05f256dd90266c4cf0c5 (diff) |
btrfs-progs: check: Remove the ability to rebuild root overwriting existing tree blocks
We have function btrfs_fsck_reinit_root() to reinit csum or extent tree.
However this function allows us to let it overwrite existing tree blocks
using @overwrite parameter.
Such behavior is pretty dangerous while no caller is using this feature
explicitly.
So just remove @overwrite parameter and allow btrfs_fsck_reinit_root()
to error out when it fails to allocate tree block.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Gu Jinxiang <gujx@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
-rw-r--r-- | check/main.c | 26 |
1 files changed, 8 insertions, 18 deletions
diff --git a/check/main.c b/check/main.c index f8abbd36..152eecec 100644 --- a/check/main.c +++ b/check/main.c @@ -8380,7 +8380,7 @@ static int do_check_chunks_and_extents(struct btrfs_fs_info *fs_info) } static int btrfs_fsck_reinit_root(struct btrfs_trans_handle *trans, - struct btrfs_root *root, int overwrite) + struct btrfs_root *root) { struct extent_buffer *c; struct extent_buffer *old = root->node; @@ -8390,21 +8390,13 @@ static int btrfs_fsck_reinit_root(struct btrfs_trans_handle *trans, level = 0; - if (overwrite) { - c = old; - extent_buffer_get(c); - goto init; - } c = btrfs_alloc_free_block(trans, root, root->fs_info->nodesize, root->root_key.objectid, &disk_key, level, 0, 0); - if (IS_ERR(c)) { - c = old; - extent_buffer_get(c); - overwrite = 1; - } -init: + if (IS_ERR(c)) + return PTR_ERR(c); + memset_extent_buffer(c, 0, 0, sizeof(struct btrfs_header)); btrfs_set_header_level(c, level); btrfs_set_header_bytenr(c, c->start); @@ -8423,9 +8415,7 @@ init: /* * this case can happen in the following case: * - * 1.overwrite previous root. - * - * 2.reinit reloc data root, this is because we skip pin + * reinit reloc data root, this is because we skip pin * down reloc data tree before which means we can allocate * same block bytenr here. */ @@ -8610,7 +8600,7 @@ reinit_data_reloc: goto out; } record_root_in_trans(trans, root); - ret = btrfs_fsck_reinit_root(trans, root, 0); + ret = btrfs_fsck_reinit_root(trans, root); if (ret) goto out; ret = btrfs_make_root_dir(trans, root, BTRFS_FIRST_FREE_OBJECTID); @@ -8676,7 +8666,7 @@ again: } /* Ok we can allocate now, reinit the extent root */ - ret = btrfs_fsck_reinit_root(trans, fs_info->extent_root, 0); + ret = btrfs_fsck_reinit_root(trans, fs_info->extent_root); if (ret) { fprintf(stderr, "extent root initialization failed\n"); /* @@ -9768,7 +9758,7 @@ int cmd_check(int argc, char **argv) if (init_csum_tree) { printf("Reinitialize checksum tree\n"); - ret = btrfs_fsck_reinit_root(trans, info->csum_root, 0); + ret = btrfs_fsck_reinit_root(trans, info->csum_root); if (ret) { error("checksum tree initialization failed: %d", ret); |