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authorDave Hansen <haveblue@us.ibm.com>2008-02-16 01:37:57 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2008-04-19 08:25:34 +0400
commit463c3197263bd26ac59a00d2484990e17e35c50e (patch)
treeb27c04f978ccd447ae33f7387b6a4aba0033acc5 /net/unix
parent0622753b800e4cc6cb9319b36b27658c72dd7cdc (diff)
downloadlinux-463c3197263bd26ac59a00d2484990e17e35c50e.tar.xz
[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 <viro@ZenIV.linux.org.uk> Signed-off-by: Christoph Hellwig <hch@infradead.org> 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 'net/unix')
-rw-r--r--net/unix/af_unix.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 2851d0d15048..1454afcc06c4 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);