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NFSv4: Send unmapped uid/gids to the server when using auth_sys

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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>
This commit is contained in:
Trond Myklebust
2011-02-22 15:44:32 -08:00
parent 3ddeb7c5c6
commit b064eca2cf
5 changed files with 55 additions and 9 deletions
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24
fs/nfs/idmap.c
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@@ -61,6 +61,9 @@ static int nfs_map_numeric_to_string(__u32 id, char *buf, size_t buflen)
#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_group_to_gid(const struct nfs_server *server, const char *name, size
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_group_to_gid(const struct nfs_server *server, const char *name, size
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_uid_to_name(const struct nfs_server *server, __u32 uid, char *buf, s
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;