nfsd: Convert nfs3xdr to use kuids and kgids

When reading uids and gids off the wire convert them to kuids and
kgids.

When putting kuids and kgids onto the wire first convert them to uids
and gids the other side will understand.

Cc: "J. Bruce Fields" <bfields@fieldses.org>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>

1 files changed, 8 insertions, 6 deletions

diff --git a/fs/nfsd/nfs3xdr.c b/fs/nfsd/nfs3xdr.c
index 1884a3fbb584..925c944bc0bc 100644
--- a/fs/nfsd/nfs3xdr.c
+++ b/fs/nfsd/nfs3xdr.c
@@ -105,12 +105,14 @@ decode_sattr3(__be32 *p, struct iattr *iap)
                 iap->ia_mode = ntohl(*p++);
         }
         if (*p++) {
-                iap->ia_valid |= ATTR_UID;
-                iap->ia_uid = ntohl(*p++);
+                iap->ia_uid = make_kuid(&init_user_ns, ntohl(*p++));
+                if (uid_valid(iap->ia_uid))
+                        iap->ia_valid |= ATTR_UID;
         }
         if (*p++) {
-                iap->ia_valid |= ATTR_GID;
-                iap->ia_gid = ntohl(*p++);
+                iap->ia_gid = make_kgid(&init_user_ns, ntohl(*p++));
+                if (gid_valid(iap->ia_gid))
+                        iap->ia_valid |= ATTR_GID;
         }
         if (*p++) {
                 u64     newsize;
@@ -167,8 +169,8 @@ encode_fattr3(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp,
         *p++ = htonl(nfs3_ftypes[(stat->mode & S_IFMT) >> 12]);
         *p++ = htonl((u32) stat->mode);
         *p++ = htonl((u32) stat->nlink);
-        *p++ = htonl((u32) stat->uid);
-        *p++ = htonl((u32) stat->gid);
+        *p++ = htonl((u32) from_kuid(&init_user_ns, stat->uid));
+        *p++ = htonl((u32) from_kgid(&init_user_ns, stat->gid));
         if (S_ISLNK(stat->mode) && stat->size > NFS3_MAXPATHLEN) {
                 p = xdr_encode_hyper(p, (u64) NFS3_MAXPATHLEN);
         } else {