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authorTrond Myklebust <Trond.Myklebust@netapp.com>2013-01-22 09:17:06 +0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2013-01-31 02:41:04 +0400
commitab225417825963b6dc66be7ea80f94ac1378dfdf (patch)
treec1e92f88e3d3633993e7460019a388cd5890545b /fs
parent65436ec0c8e344d9b23302b686e418f2a7b7cf7b (diff)
downloadlinux-ab225417825963b6dc66be7ea80f94ac1378dfdf.tar.xz
NFS: Don't silently fail setattr() requests on mountpoints
Ensure that any setattr and getattr requests for junctions and/or mountpoints are sent to the server. Ever since commit 0ec26fd0698 (vfs: automount should ignore LOOKUP_FOLLOW), we have silently dropped any setattr requests to a server-side mountpoint. For referrals, we have silently dropped both getattr and setattr requests. This patch restores the original behaviour for setattr on mountpoints, and tries to do the same for referrals, provided that we have a filehandle... Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: stable@vger.kernel.org
Diffstat (limited to 'fs')
-rw-r--r--fs/nfs/namespace.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c
index dd057bc6b65b..fc8dc20fdeb9 100644
--- a/fs/nfs/namespace.c
+++ b/fs/nfs/namespace.c
@@ -177,11 +177,31 @@ out_nofree:
return mnt;
}
+static int
+nfs_namespace_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
+{
+ if (NFS_FH(dentry->d_inode)->size != 0)
+ return nfs_getattr(mnt, dentry, stat);
+ generic_fillattr(dentry->d_inode, stat);
+ return 0;
+}
+
+static int
+nfs_namespace_setattr(struct dentry *dentry, struct iattr *attr)
+{
+ if (NFS_FH(dentry->d_inode)->size != 0)
+ return nfs_setattr(dentry, attr);
+ return -EACCES;
+}
+
const struct inode_operations nfs_mountpoint_inode_operations = {
.getattr = nfs_getattr,
+ .setattr = nfs_setattr,
};
const struct inode_operations nfs_referral_inode_operations = {
+ .getattr = nfs_namespace_getattr,
+ .setattr = nfs_namespace_setattr,
};
static void nfs_expire_automounts(struct work_struct *work)