diff options
| author | Dave Hansen <haveblue@us.ibm.com> | 2008-02-15 14:37:34 -0800 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2008-04-19 00:25:33 -0400 |
| commit | 0622753b800e4cc6cb9319b36b27658c72dd7cdc (patch) | |
| tree | 5a32b65a087ff7fd5effa8d3f6f1f9717d4391aa /ipc | |
| parent | 49e0d02cf018d4edf24bfc8531a816a26367e4ce (diff) | |
| download | lwn-0622753b800e4cc6cb9319b36b27658c72dd7cdc.tar.gz lwn-0622753b800e4cc6cb9319b36b27658c72dd7cdc.zip | |
[PATCH] r/o bind mounts: elevate write count for rmdir and unlink.
Elevate the write count during the vfs_rmdir() and vfs_unlink().
[AV: merged rmdir and unlink parts, added missing pieces in nfsd]
Acked-by: Serge Hallyn <serue@us.ibm.com>
Acked-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Hansen <haveblue@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'ipc')
| -rw-r--r-- | ipc/mqueue.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/ipc/mqueue.c b/ipc/mqueue.c index 60f7a27f7a9e..34262c11f480 100644 --- a/ipc/mqueue.c +++ b/ipc/mqueue.c @@ -742,8 +742,11 @@ asmlinkage long sys_mq_unlink(const char __user *u_name) inode = dentry->d_inode; if (inode) atomic_inc(&inode->i_count); - + err = mnt_want_write(mqueue_mnt); + if (err) + goto out_err; err = vfs_unlink(dentry->d_parent->d_inode, dentry); + mnt_drop_write(mqueue_mnt); out_err: dput(dentry); |