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authorLi Zefan <lizf@cn.fujitsu.com>2011-03-17 15:17:59 +0800
committerLi Zefan <lizf@cn.fujitsu.com>2011-04-13 14:25:28 +0800
commit2e6a00356a066d34cd00872b067589549169ad48 (patch)
tree3fb780843d0f88b4e2939e33796eee5b96ae1716 /fs
parent109b36a2bb3eebf5c9994980e724958a5b2b62b6 (diff)
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Btrfs: Check if btrfs_next_leaf() returns error in btrfs_listxattr()
btrfs_next_leaf() can return -errno, and we should propagate it to userspace. This also simplifies how we walk the btree path. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/btrfs/xattr.c33
1 files changed, 12 insertions, 21 deletions
diff --git a/fs/btrfs/xattr.c b/fs/btrfs/xattr.c
index e5d22f28095..07b9bc350d5 100644
--- a/fs/btrfs/xattr.c
+++ b/fs/btrfs/xattr.c
@@ -180,11 +180,10 @@ ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size)
struct btrfs_path *path;
struct extent_buffer *leaf;
struct btrfs_dir_item *di;
- int ret = 0, slot, advance;
+ int ret = 0, slot;
size_t total_size = 0, size_left = size;
unsigned long name_ptr;
size_t name_len;
- u32 nritems;
/*
* ok we want all objects associated with this id.
@@ -204,34 +203,24 @@ ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size)
ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
if (ret < 0)
goto err;
- advance = 0;
+
while (1) {
leaf = path->nodes[0];
- nritems = btrfs_header_nritems(leaf);
slot = path->slots[0];
/* this is where we start walking through the path */
- if (advance || slot >= nritems) {
+ if (slot >= btrfs_header_nritems(leaf)) {
/*
* if we've reached the last slot in this leaf we need
* to go to the next leaf and reset everything
*/
- if (slot >= nritems-1) {
- ret = btrfs_next_leaf(root, path);
- if (ret)
- break;
- leaf = path->nodes[0];
- nritems = btrfs_header_nritems(leaf);
- slot = path->slots[0];
- } else {
- /*
- * just walking through the slots on this leaf
- */
- slot++;
- path->slots[0]++;
- }
+ ret = btrfs_next_leaf(root, path);
+ if (ret < 0)
+ goto err;
+ else if (ret > 0)
+ break;
+ continue;
}
- advance = 1;
btrfs_item_key_to_cpu(leaf, &found_key, slot);
@@ -250,7 +239,7 @@ ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size)
/* we are just looking for how big our buffer needs to be */
if (!size)
- continue;
+ goto next;
if (!buffer || (name_len + 1) > size_left) {
ret = -ERANGE;
@@ -263,6 +252,8 @@ ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size)
size_left -= name_len + 1;
buffer += name_len + 1;
+next:
+ path->slots[0]++;
}
ret = total_size;