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authorChris Mason <chris.mason@oracle.com>2012-02-20 08:40:56 -0500
committerChris Mason <chris.mason@oracle.com>2012-02-23 10:43:45 -0500
commitfe66a05a06795bd3b788404d69ea7709f46a1609 (patch)
tree8d576c0c69ef44a253370bbec135efe2477d18d2
parent692e5759a43b916f0b66bcb39b2957499992381e (diff)
Btrfs: improve error handling for btrfs_insert_dir_item callers
This allows us to gracefully continue if we aren't able to insert directory items, both for normal files/dirs and snapshots. Signed-off-by: Chris Mason <chris.mason@oracle.com>
-rw-r--r--fs/btrfs/inode.c20
-rw-r--r--fs/btrfs/transaction.c13
2 files changed, 26 insertions, 7 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 6e0ee9b0d742..cbeb2e36cebc 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -4585,7 +4585,8 @@ int btrfs_add_link(struct btrfs_trans_handle *trans,
ret = btrfs_insert_dir_item(trans, root, name, name_len,
parent_inode, &key,
btrfs_inode_type(inode), index);
- BUG_ON(ret);
+ if (ret)
+ goto fail_dir_item;
btrfs_i_size_write(parent_inode, parent_inode->i_size +
name_len * 2);
@@ -4593,6 +4594,23 @@ int btrfs_add_link(struct btrfs_trans_handle *trans,
ret = btrfs_update_inode(trans, root, parent_inode);
}
return ret;
+
+fail_dir_item:
+ if (unlikely(ino == BTRFS_FIRST_FREE_OBJECTID)) {
+ u64 local_index;
+ int err;
+ err = btrfs_del_root_ref(trans, root->fs_info->tree_root,
+ key.objectid, root->root_key.objectid,
+ parent_ino, &local_index, name, name_len);
+
+ } else if (add_backref) {
+ u64 local_index;
+ int err;
+
+ err = btrfs_del_inode_ref(trans, root, name, name_len,
+ ino, parent_ino, &local_index);
+ }
+ return ret;
}
static int btrfs_add_nondir(struct btrfs_trans_handle *trans,
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 287a6728b1ad..016977beee5c 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -915,7 +915,11 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
dentry->d_name.name, dentry->d_name.len,
parent_inode, &key,
BTRFS_FT_DIR, index);
- BUG_ON(ret);
+ if (ret) {
+ pending->error = -EEXIST;
+ dput(parent);
+ goto fail;
+ }
btrfs_i_size_write(parent_inode, parent_inode->i_size +
dentry->d_name.len * 2);
@@ -993,12 +997,9 @@ static noinline int create_pending_snapshots(struct btrfs_trans_handle *trans,
{
struct btrfs_pending_snapshot *pending;
struct list_head *head = &trans->transaction->pending_snapshots;
- int ret;
- list_for_each_entry(pending, head, list) {
- ret = create_pending_snapshot(trans, fs_info, pending);
- BUG_ON(ret);
- }
+ list_for_each_entry(pending, head, list)
+ create_pending_snapshot(trans, fs_info, pending);
return 0;
}