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authorAl Viro <viro@zeniv.linux.org.uk>2011-03-04 01:31:03 -0500
committerBob Copeland <me@bobcopeland.com>2011-03-05 16:24:01 -0500
commitd932805b3dc8c6d80d8948f7d7d0d8336d53b2ed (patch)
tree5024d697f1b3b6c8fcfe627718ece4020102df1b /fs/omfs
parentcdb26496dba00d5c4375261be6518b3e94260444 (diff)
downloadlinux-linaro-stable-d932805b3dc8c6d80d8948f7d7d0d8336d53b2ed.tar.gz
omfs: merge unlink() and rmdir(), close leak in rename()
In case of directory-overwriting rename(), omfs forgot to mark the victim doomed, so omfs_evict_inode() didn't free it. We could fix that by calling omfs_rmdir() for directory victims instead of doing omfs_unlink(), but it's easier to merge omfs_unlink() and omfs_rmdir() instead. Note that we have no hardlinks here. It also makes the checks in omfs_rename() go away - they fold into what omfs_remove() does when it runs into a directory. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Bob Copeland <me@bobcopeland.com>
Diffstat (limited to 'fs/omfs')
-rw-r--r--fs/omfs/dir.c53
1 files changed, 13 insertions, 40 deletions
diff --git a/fs/omfs/dir.c b/fs/omfs/dir.c
index a4c2d31b785e..fd91f629ceb8 100644
--- a/fs/omfs/dir.c
+++ b/fs/omfs/dir.c
@@ -235,33 +235,22 @@ static int omfs_dir_is_empty(struct inode *inode)
return *ptr != ~0;
}
-static int omfs_unlink(struct inode *dir, struct dentry *dentry)
+static int omfs_remove(struct inode *dir, struct dentry *dentry)
{
- int ret;
struct inode *inode = dentry->d_inode;
+ int ret;
+
+ if (S_ISDIR(inode->i_mode) && !omfs_dir_is_empty(inode))
+ return -ENOTEMPTY;
ret = omfs_delete_entry(dentry);
if (ret)
- goto end_unlink;
-
- inode_dec_link_count(inode);
+ return ret;
+
+ clear_nlink(inode);
+ mark_inode_dirty(inode);
mark_inode_dirty(dir);
-
-end_unlink:
- return ret;
-}
-
-static int omfs_rmdir(struct inode *dir, struct dentry *dentry)
-{
- int err = -ENOTEMPTY;
- struct inode *inode = dentry->d_inode;
-
- if (omfs_dir_is_empty(inode)) {
- err = omfs_unlink(dir, dentry);
- if (!err)
- inode_dec_link_count(inode);
- }
- return err;
+ return 0;
}
static int omfs_add_node(struct inode *dir, struct dentry *dentry, int mode)
@@ -385,33 +374,17 @@ static int omfs_rename(struct inode *old_dir, struct dentry *old_dentry,
{
struct inode *new_inode = new_dentry->d_inode;
struct inode *old_inode = old_dentry->d_inode;
- struct buffer_head *bh;
- int is_dir;
int err;
- is_dir = S_ISDIR(old_inode->i_mode);
-
if (new_inode) {
/* overwriting existing file/dir */
- err = -ENOTEMPTY;
- if (is_dir && !omfs_dir_is_empty(new_inode))
- goto out;
-
- err = -ENOENT;
- bh = omfs_find_entry(new_dir, new_dentry->d_name.name,
- new_dentry->d_name.len);
- if (IS_ERR(bh))
- goto out;
- brelse(bh);
-
- err = omfs_unlink(new_dir, new_dentry);
+ err = omfs_remove(new_dir, new_dentry);
if (err)
goto out;
}
/* since omfs locates files by name, we need to unlink _before_
* adding the new link or we won't find the old one */
- inode_inc_link_count(old_inode);
err = omfs_delete_entry(old_dentry);
if (err)
goto out;
@@ -488,8 +461,8 @@ const struct inode_operations omfs_dir_inops = {
.mkdir = omfs_mkdir,
.rename = omfs_rename,
.create = omfs_create,
- .unlink = omfs_unlink,
- .rmdir = omfs_rmdir,
+ .unlink = omfs_remove,
+ .rmdir = omfs_remove,
};
const struct file_operations omfs_dir_operations = {