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btrfs: have proper error handling in btrfs_init_reloc_root

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create_reloc_root will return errors in the future, and __add_reloc_root
can return ENOMEM or EEXIST, so handle these errors properly.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ add comment ]
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Josef Bacik 2021-03-12 15:25:13 -05:00 committed by David Sterba
parent 03a7e111a9
commit 00bb36a0e7
1 changed files with 7 additions and 1 deletions
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8
fs/btrfs/relocation.c
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@ -856,9 +856,15 @@ int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
reloc_root = create_reloc_root(trans, root, root->root_key.objectid);
if (clear_rsv)
trans->block_rsv = rsv;
if (IS_ERR(reloc_root))
return PTR_ERR(reloc_root);
ret = __add_reloc_root(reloc_root);
BUG_ON(ret < 0);
if (ret) {
/* Pairs with create_reloc_root */
btrfs_put_root(reloc_root);
return ret;
}
root->reloc_root = btrfs_grab_root(reloc_root);
return 0;
}