NFSv4: Send unmapped uid/gids to the server when using auth_sys
The new behaviour is enabled using the new module parameter
'nfs4_disable_idmapping'.
Note that if the server rejects an unmapped uid or gid, then
the client will automatically switch back to using the idmapper.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/idmap.c b/fs/nfs/idmap.c
index e2d579d..79664a1 100644
--- a/fs/nfs/idmap.c
+++ b/fs/nfs/idmap.c
@@ -61,6 +61,9 @@
#include <linux/slab.h>
#include <linux/cred.h>
+#include <linux/sunrpc/sched.h>
+#include <linux/nfs4.h>
+#include <linux/nfs_fs_sb.h>
#include <linux/nfs_idmap.h>
#include <linux/keyctl.h>
#include <linux/key-type.h>
@@ -257,17 +260,20 @@
int nfs_map_uid_to_name(const struct nfs_server *server, __u32 uid, char *buf, size_t buflen)
{
- int ret;
- ret = nfs_idmap_lookup_name(uid, "user", buf, buflen);
+ int ret = -EINVAL;
+
+ if (!(server->caps & NFS_CAP_UIDGID_NOMAP))
+ ret = nfs_idmap_lookup_name(uid, "user", buf, buflen);
if (ret < 0)
ret = nfs_map_numeric_to_string(uid, buf, buflen);
return ret;
}
int nfs_map_gid_to_group(const struct nfs_server *server, __u32 gid, char *buf, size_t buflen)
{
- int ret;
+ int ret = -EINVAL;
- ret = nfs_idmap_lookup_name(gid, "group", buf, buflen);
+ if (!(server->caps & NFS_CAP_UIDGID_NOMAP))
+ ret = nfs_idmap_lookup_name(gid, "group", buf, buflen);
if (ret < 0)
ret = nfs_map_numeric_to_string(gid, buf, buflen);
return ret;
@@ -750,9 +756,10 @@
int nfs_map_uid_to_name(const struct nfs_server *server, __u32 uid, char *buf, size_t buflen)
{
struct idmap *idmap = server->nfs_client->cl_idmap;
- int ret;
+ int ret = -EINVAL;
- ret = nfs_idmap_name(idmap, &idmap->idmap_user_hash, uid, buf);
+ if (!(server->caps & NFS_CAP_UIDGID_NOMAP))
+ ret = nfs_idmap_name(idmap, &idmap->idmap_user_hash, uid, buf);
if (ret < 0)
ret = nfs_map_numeric_to_string(uid, buf, buflen);
return ret;
@@ -760,9 +767,10 @@
int nfs_map_gid_to_group(const struct nfs_server *server, __u32 uid, char *buf, size_t buflen)
{
struct idmap *idmap = server->nfs_client->cl_idmap;
- int ret;
+ int ret = -EINVAL;
- ret = nfs_idmap_name(idmap, &idmap->idmap_group_hash, uid, buf);
+ if (!(server->caps & NFS_CAP_UIDGID_NOMAP))
+ ret = nfs_idmap_name(idmap, &idmap->idmap_group_hash, uid, buf);
if (ret < 0)
ret = nfs_map_numeric_to_string(uid, buf, buflen);
return ret;