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| 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 07:41:29 -0700 |
| commit | 839f573c0438d44d1df1df96963150668d5846c9 (patch) | |
| tree | 4af0e55da004b83efbe8a1f70458a04c98628aaa /fs | |
| parent | e422a4a5d60c8dbef19df3ea16aaf7556cd26223 (diff) | |
| download | linux-stable-839f573c0438d44d1df1df96963150668d5846c9.tar.gz linux-stable-839f573c0438d44d1df1df96963150668d5846c9.tar.bz2 linux-stable-839f573c0438d44d1df1df96963150668d5846c9.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>
Diffstat (limited to 'fs')
| -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 0fbd50cee1f6..c598ab948211 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -2129,9 +2129,15 @@ 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; } |