This patch pushes kmalloc errors up to the caller and BUGs in the caller. The BUG_ON for duplicate reloc tree root insertion is replaced with a panic explaining the issue.
Signed-off-by: Jeff Mahoney <je...@suse.com> --- fs/btrfs/relocation.c | 22 ++++++++++++++++------ 1 file changed, 16 insertions(+), 6 deletions(-) --- a/fs/btrfs/relocation.c +++ b/fs/btrfs/relocation.c @@ -1219,14 +1219,15 @@ fail: /* * helper to add 'address of tree root -> reloc tree' mapping */ -static int __add_reloc_root(struct btrfs_root *root) +static int __must_check __add_reloc_root(struct btrfs_root *root) { struct rb_node *rb_node; struct mapping_node *node; struct reloc_control *rc = root->fs_info->reloc_ctl; node = kmalloc(sizeof(*node), GFP_NOFS); - BUG_ON(!node); + if (!node) + return -ENOMEM; node->bytenr = root->node->start; node->data = root; @@ -1235,7 +1236,12 @@ static int __add_reloc_root(struct btrfs rb_node = tree_insert(&rc->reloc_root_tree.rb_root, node->bytenr, &node->rb_node); spin_unlock(&rc->reloc_root_tree.lock); - BUG_ON(rb_node); + if (rb_node) { + kfree(node); + btrfs_panic(root->fs_info, -EEXIST, "Duplicate root found " + "for start=%llu while inserting into relocation " + "tree\n"); + } list_add_tail(&root->root_list, &rc->reloc_roots); return 0; @@ -1351,6 +1357,7 @@ int btrfs_init_reloc_root(struct btrfs_t struct btrfs_root *reloc_root; struct reloc_control *rc = root->fs_info->reloc_ctl; int clear_rsv = 0; + int ret; if (root->reloc_root) { reloc_root = root->reloc_root; @@ -1370,7 +1377,8 @@ int btrfs_init_reloc_root(struct btrfs_t if (clear_rsv) trans->block_rsv = NULL; - __add_reloc_root(reloc_root); + ret = __add_reloc_root(reloc_root); + BUG_ON(ret < 0); root->reloc_root = reloc_root; return 0; } @@ -4248,7 +4256,8 @@ int btrfs_recover_relocation(struct btrf reloc_root->root_key.offset); BUG_ON(IS_ERR(fs_root)); - __add_reloc_root(reloc_root); + err = __add_reloc_root(reloc_root); + BUG_ON(err < 0); fs_root->reloc_root = reloc_root; } @@ -4450,7 +4459,8 @@ void btrfs_reloc_post_snapshot(struct bt reloc_root = create_reloc_root(trans, root->reloc_root, new_root->root_key.objectid); - __add_reloc_root(reloc_root); + ret = __add_reloc_root(reloc_root); + BUG_ON(ret < 0); new_root->reloc_root = reloc_root; if (rc->create_reloc_tree) { -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html