diff options
| author | Sage Weil <sage@newdream.net> | 2011-05-27 22:42:10 +0200 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2011-05-28 07:02:53 +0200 |
| commit | 76cc071a06afb4d2dd17bb1b855a233a419e7e02 (patch) | |
| tree | 24210edc60b09e2efe562499b7b844826d051bab /fs/ncpfs/dir.c | |
| parent | ncpfs: document dentry_unhash usage (diff) | |
| download | linux-76cc071a06afb4d2dd17bb1b855a233a419e7e02.tar.xz linux-76cc071a06afb4d2dd17bb1b855a233a419e7e02.zip | |
ncpfs: fix rename over directory with dangling references
ncpfs does not handle references to unlinked directories (or so it would
seem given the ncp_rmdir check). Since it is also possible to rename over
an empty directory, perform the same check here.
CC: Petr Vandrovec <petr@vandrovec.name>
CC: linux-kernel@vger.kernel.org
Signed-off-by: Sage Weil <sage@newdream.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/ncpfs/dir.c')
| -rw-r--r-- | fs/ncpfs/dir.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/fs/ncpfs/dir.c b/fs/ncpfs/dir.c index 81c287d105d5..9c51f621e901 100644 --- a/fs/ncpfs/dir.c +++ b/fs/ncpfs/dir.c @@ -1144,8 +1144,16 @@ static int ncp_rename(struct inode *old_dir, struct dentry *old_dentry, old_dentry->d_parent->d_name.name, old_dentry->d_name.name, new_dentry->d_parent->d_name.name, new_dentry->d_name.name); - if (new_dentry->d_inode && S_ISDIR(new_dentry->d_inode->i_mode)) + if (new_dentry->d_inode && S_ISDIR(new_dentry->d_inode->i_mode)) { + /* + * fail with EBUSY if there are still references to this + * directory. + */ dentry_unhash(new_dentry); + error = -EBUSY; + if (!d_unhashed(new_dentry)) + goto out; + } ncp_age_dentry(server, old_dentry); ncp_age_dentry(server, new_dentry); |