korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-29 23:24:11 +08:00
Code Issues Packages Projects Releases Wiki Activity

NFS: Only reference user namespace from nfs4idmap struct instead of cred

Browse Source 
The nfs4idmapper only needs access to the user namespace, and not the
entire cred struct. This replaces the struct cred* member with
struct user_namespace*. This is mostly hygiene, so we don't have to
hold onto the cred object, which has extraneous references to
things like user_struct. This also makes switching away
from init_user_ns more straightforward in the future.

Signed-off-by: Sargun Dhillon <sargun@sargun.me>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Sargun Dhillon 2020-10-12 14:43:39 -07:00 committed by Anna Schumaker
parent a2d24bcb97
commit 61ca2c4afd
1 changed files with 8 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
fs/nfs/nfs4idmap.c
View File

@ -46,6 +46,7 @@
#include <keys/user-type.h>
#include <keys/request_key_auth-type.h>
#include <linux/module.h>
#include <linux/user_namespace.h>
#include "internal.h"
#include "netns.h"
@ -69,13 +70,13 @@ struct idmap {
struct rpc_pipe *idmap_pipe;
struct idmap_legacy_upcalldata *idmap_upcall_data;
struct mutex idmap_mutex;
const struct cred *cred;
struct user_namespace *user_ns;
};
static struct user_namespace *idmap_userns(const struct idmap *idmap)
{
if (idmap && idmap->cred)
return idmap->cred->user_ns;
if (idmap && idmap->user_ns)
return idmap->user_ns;
return &init_user_ns;
}
@ -286,7 +287,7 @@ static struct key *nfs_idmap_request_key(const char *name, size_t namelen,
if (ret < 0)
return ERR_PTR(ret);
if (!idmap->cred || idmap->cred->user_ns == &init_user_ns)
if (!idmap->user_ns || idmap->user_ns == &init_user_ns)
rkey = request_key(&key_type_id_resolver, desc, "");
if (IS_ERR(rkey)) {
mutex_lock(&idmap->idmap_mutex);
@ -462,7 +463,7 @@ nfs_idmap_new(struct nfs_client *clp)
return -ENOMEM;
mutex_init(&idmap->idmap_mutex);
idmap->cred = get_cred(clp->cl_rpcclient->cl_cred);
idmap->user_ns = get_user_ns(clp->cl_rpcclient->cl_cred->user_ns);
rpc_init_pipe_dir_object(&idmap->idmap_pdo,
&nfs_idmap_pipe_dir_object_ops,
@ -486,7 +487,7 @@ nfs_idmap_new(struct nfs_client *clp)
err_destroy_pipe:
rpc_destroy_pipe_data(idmap->idmap_pipe);
err:
put_cred(idmap->cred);
get_user_ns(idmap->user_ns);
kfree(idmap);
return error;
}
@ -503,7 +504,7 @@ nfs_idmap_delete(struct nfs_client *clp)
&clp->cl_rpcclient->cl_pipedir_objects,
&idmap->idmap_pdo);
rpc_destroy_pipe_data(idmap->idmap_pipe);
put_cred(idmap->cred);
put_user_ns(idmap->user_ns);
kfree(idmap);
}