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btrfs-progs: make btrfs_clear_free_space_tree extent tree v2 aware

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With extent tree v2 we'll have multiple free space trees, and we can't
just unset the feature flags for the free space tree.  Fix this to loop
through all of the free space trees and clear them out properly.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Josef Bacik 2022-03-07 17:11:00 -05:00 committed by David Sterba
parent c4164edeb5
commit 5fb27deaf1
1 changed files with 27 additions and 10 deletions
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37
kernel-shared/free-space-tree.c
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@ -1248,18 +1248,35 @@ int btrfs_clear_free_space_tree(struct btrfs_fs_info *fs_info)
if (IS_ERR(trans))
return PTR_ERR(trans);
features = btrfs_super_compat_ro_flags(fs_info->super_copy);
features &= ~(BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID |
BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE);
btrfs_set_super_compat_ro_flags(fs_info->super_copy, features);
if (btrfs_fs_incompat(fs_info, EXTENT_TREE_V2)) {
struct btrfs_key key = {
.objectid = BTRFS_FREE_SPACE_TREE_OBJECTID,
.type = BTRFS_ROOT_ITEM_KEY,
.offset = 0,
};
ret = clear_free_space_tree(trans, free_space_root);
if (ret)
goto abort;
while (key.offset < fs_info->nr_global_roots) {
free_space_root = btrfs_global_root(fs_info, &key);
ret = clear_free_space_tree(trans, free_space_root);
if (ret)
goto abort;
key.offset++;
}
} else {
features = btrfs_super_compat_ro_flags(fs_info->super_copy);
features &= ~(BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID |
BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE);
btrfs_set_super_compat_ro_flags(fs_info->super_copy, features);
ret = btrfs_delete_and_free_root(trans, free_space_root);
if (!ret)
ret = btrfs_commit_transaction(trans, tree_root);
ret = clear_free_space_tree(trans, free_space_root);
if (ret)
goto abort;
ret = btrfs_delete_and_free_root(trans, free_space_root);
if (ret)
goto abort;
}
ret = btrfs_commit_transaction(trans, tree_root);
abort:
return ret;
}