From 463c3197263bd26ac59a00d2484990e17e35c50e Mon Sep 17 00:00:00 2001 From: Dave Hansen Date: Fri, 15 Feb 2008 14:37:57 -0800 Subject: [PATCH] r/o bind mounts: get callers of vfs_mknod/create/mkdir() This takes care of all of the direct callers of vfs_mknod(). Since a few of these cases also handle normal file creation as well, this also covers some calls to vfs_create(). So that we don't have to make three mnt_want/drop_write() calls inside of the switch statement, we move some of its logic outside of the switch and into a helper function suggested by Christoph. This also encapsulates a fix for mknod(S_IFREG) that Miklos found. [AV: merged mkdir handling, added missing nfsd pieces] Acked-by: Al Viro Signed-off-by: Christoph Hellwig Signed-off-by: Dave Hansen Signed-off-by: Andrew Morton Signed-off-by: Al Viro --- net/unix/af_unix.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'net/unix/af_unix.c') diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c index 2851d0d1504..1454afcc06c 100644 --- a/net/unix/af_unix.c +++ b/net/unix/af_unix.c @@ -819,7 +819,11 @@ static int unix_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) */ mode = S_IFSOCK | (SOCK_INODE(sock)->i_mode & ~current->fs->umask); + err = mnt_want_write(nd.path.mnt); + if (err) + goto out_mknod_dput; err = vfs_mknod(nd.path.dentry->d_inode, dentry, mode, 0); + mnt_drop_write(nd.path.mnt); if (err) goto out_mknod_dput; mutex_unlock(&nd.path.dentry->d_inode->i_mutex); -- cgit v1.2.3