diff options
| author | Al Viro <viro@zeniv.linux.org.uk> | 2010-01-30 16:11:21 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-04-26 07:47:58 -0700 |
| commit | 5e462ec4eb77a087383a384d2067d04e0b6d0621 (patch) | |
| tree | 3e3a87784b5b5a091b262ff67e19c08291cb0172 | |
| parent | fab9024d006d3768b9ea46861ea5302ce1fe6268 (diff) | |
| download | lwn-5e462ec4eb77a087383a384d2067d04e0b6d0621.tar.gz lwn-5e462ec4eb77a087383a384d2067d04e0b6d0621.zip | |
fix NFS4 handling of mountpoint stat
commit 462d60577a997aa87c935ae4521bd303733a9f2b upstream.
RFC says we need to follow the chain of mounts if there's more
than one stacked on that point.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | fs/nfsd/nfs4xdr.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index a8587e90fd5a..bbf72d8f9fc0 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -2121,9 +2121,15 @@ out_acl: * and this is the root of a cross-mounted filesystem. */ if (ignore_crossmnt == 0 && - exp->ex_path.mnt->mnt_root->d_inode == dentry->d_inode) { - err = vfs_getattr(exp->ex_path.mnt->mnt_parent, - exp->ex_path.mnt->mnt_mountpoint, &stat); + dentry == exp->ex_path.mnt->mnt_root) { + struct path path = exp->ex_path; + path_get(&path); + while (follow_up(&path)) { + if (path.dentry != path.mnt->mnt_root) + break; + } + err = vfs_getattr(path.mnt, path.dentry, &stat); + path_put(&path); if (err) goto out_nfserr; } |