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authorAl Viro <viro@zeniv.linux.org.uk>2010-01-30 16:11:21 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2010-03-03 14:07:57 -0500
commit462d60577a997aa87c935ae4521bd303733a9f2b (patch)
tree2b706cdb006078189ba409ad174d893d67b23daf /fs/nfsd/nfs4xdr.c
parent3088dd7080d1ecc6d18c27ef9e617cbbd2a2e51e (diff)
fix NFS4 handling of mountpoint stat
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>
Diffstat (limited to 'fs/nfsd/nfs4xdr.c')
-rw-r--r--fs/nfsd/nfs4xdr.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index a8587e90fd5..bbf72d8f9fc 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;
}