#include <linux/types.h>
#include <linux/sched.h>
#include <linux/module.h>
+#include <linux/mempool.h>
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/auth.h>
#include <linux/user_namespace.h>
-struct unx_cred {
- struct rpc_cred uc_base;
- kgid_t uc_gid;
- kgid_t uc_gids[UNX_NGROUPS];
-};
-#define uc_uid uc_base.cr_uid
#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
# define RPCDBG_FACILITY RPCDBG_AUTH
static struct rpc_auth unix_auth;
static const struct rpc_credops unix_credops;
+static mempool_t *unix_pool;
static struct rpc_auth *
unx_create(const struct rpc_auth_create_args *args, struct rpc_clnt *clnt)
unx_destroy(struct rpc_auth *auth)
{
dprintk("RPC: destroying UNIX authenticator %p\n", auth);
- rpcauth_clear_credcache(auth->au_credcache);
-}
-
-static int
-unx_hash_cred(struct auth_cred *acred, unsigned int hashbits)
-{
- return hash_64(from_kgid(&init_user_ns, acred->gid) |
- ((u64)from_kuid(&init_user_ns, acred->uid) <<
- (sizeof(gid_t) * 8)), hashbits);
}
/*
static struct rpc_cred *
unx_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
{
- return rpcauth_lookup_credcache(auth, acred, flags, GFP_NOFS);
-}
-
-static struct rpc_cred *
-unx_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags, gfp_t gfp)
-{
- struct unx_cred *cred;
- unsigned int groups = 0;
- unsigned int i;
+ struct rpc_cred *ret = mempool_alloc(unix_pool, GFP_NOFS);
dprintk("RPC: allocating UNIX cred for uid %d gid %d\n",
- from_kuid(&init_user_ns, acred->uid),
- from_kgid(&init_user_ns, acred->gid));
-
- if (!(cred = kmalloc(sizeof(*cred), gfp)))
- return ERR_PTR(-ENOMEM);
+ from_kuid(&init_user_ns, acred->cred->fsuid),
+ from_kgid(&init_user_ns, acred->cred->fsgid));
- rpcauth_init_cred(&cred->uc_base, acred, auth, &unix_credops);
- cred->uc_base.cr_flags = 1UL << RPCAUTH_CRED_UPTODATE;
-
- if (acred->group_info != NULL)
- groups = acred->group_info->ngroups;
- if (groups > UNX_NGROUPS)
- groups = UNX_NGROUPS;
-
- cred->uc_gid = acred->gid;
- for (i = 0; i < groups; i++)
- cred->uc_gids[i] = acred->group_info->gid[i];
- if (i < UNX_NGROUPS)
- cred->uc_gids[i] = INVALID_GID;
-
- return &cred->uc_base;
-}
-
-static void
-unx_free_cred(struct unx_cred *unx_cred)
-{
- dprintk("RPC: unx_free_cred %p\n", unx_cred);
- kfree(unx_cred);
+ rpcauth_init_cred(ret, acred, auth, &unix_credops);
+ ret->cr_flags = 1UL << RPCAUTH_CRED_UPTODATE;
+ return ret;
}
static void
unx_free_cred_callback(struct rcu_head *head)
{
- struct unx_cred *unx_cred = container_of(head, struct unx_cred, uc_base.cr_rcu);
- unx_free_cred(unx_cred);
+ struct rpc_cred *rpc_cred = container_of(head, struct rpc_cred, cr_rcu);
+ dprintk("RPC: unx_free_cred %p\n", rpc_cred);
+ put_cred(rpc_cred->cr_cred);
+ mempool_free(rpc_cred, unix_pool);
}
static void
}
/*
- * Match credentials against current process creds.
- * The root_override argument takes care of cases where the caller may
- * request root creds (e.g. for NFS swapping).
+ * Match credentials against current the auth_cred.
*/
static int
-unx_match(struct auth_cred *acred, struct rpc_cred *rcred, int flags)
+unx_match(struct auth_cred *acred, struct rpc_cred *cred, int flags)
{
- struct unx_cred *cred = container_of(rcred, struct unx_cred, uc_base);
unsigned int groups = 0;
unsigned int i;
+ if (cred->cr_cred == acred->cred)
+ return 1;
- if (!uid_eq(cred->uc_uid, acred->uid) || !gid_eq(cred->uc_gid, acred->gid))
+ if (!uid_eq(cred->cr_cred->fsuid, acred->cred->fsuid) || !gid_eq(cred->cr_cred->fsgid, acred->cred->fsgid))
return 0;
- if (acred->group_info != NULL)
- groups = acred->group_info->ngroups;
+ if (acred->cred && acred->cred->group_info != NULL)
+ groups = acred->cred->group_info->ngroups;
if (groups > UNX_NGROUPS)
groups = UNX_NGROUPS;
+ if (cred->cr_cred->group_info == NULL)
+ return groups == 0;
+ if (groups != cred->cr_cred->group_info->ngroups)
+ return 0;
+
for (i = 0; i < groups ; i++)
- if (!gid_eq(cred->uc_gids[i], acred->group_info->gid[i]))
+ if (!gid_eq(cred->cr_cred->group_info->gid[i], acred->cred->group_info->gid[i]))
return 0;
- if (groups < UNX_NGROUPS && gid_valid(cred->uc_gids[groups]))
- return 0;
return 1;
}
unx_marshal(struct rpc_task *task, __be32 *p)
{
struct rpc_clnt *clnt = task->tk_client;
- struct unx_cred *cred = container_of(task->tk_rqstp->rq_cred, struct unx_cred, uc_base);
+ struct rpc_cred *cred = task->tk_rqstp->rq_cred;
__be32 *base, *hold;
int i;
+ struct group_info *gi = cred->cr_cred->group_info;
*p++ = htonl(RPC_AUTH_UNIX);
base = p++;
*/
p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
- *p++ = htonl((u32) from_kuid(&init_user_ns, cred->uc_uid));
- *p++ = htonl((u32) from_kgid(&init_user_ns, cred->uc_gid));
+ *p++ = htonl((u32) from_kuid(&init_user_ns, cred->cr_cred->fsuid));
+ *p++ = htonl((u32) from_kgid(&init_user_ns, cred->cr_cred->fsgid));
hold = p++;
- for (i = 0; i < UNX_NGROUPS && gid_valid(cred->uc_gids[i]); i++)
- *p++ = htonl((u32) from_kgid(&init_user_ns, cred->uc_gids[i]));
+ if (gi)
+ for (i = 0; i < UNX_NGROUPS && i < gi->ngroups; i++)
+ *p++ = htonl((u32) from_kgid(&init_user_ns, gi->gid[i]));
*hold = htonl(p - hold - 1); /* gid array length */
*base = htonl((p - base - 1) << 2); /* cred length */
int __init rpc_init_authunix(void)
{
- return rpcauth_init_credcache(&unix_auth);
+ unix_pool = mempool_create_kmalloc_pool(16, sizeof(struct rpc_cred));
+ return unix_pool ? 0 : -ENOMEM;
}
void rpc_destroy_authunix(void)
{
- rpcauth_destroy_credcache(&unix_auth);
+ mempool_destroy(unix_pool);
}
const struct rpc_authops authunix_ops = {
.au_name = "UNIX",
.create = unx_create,
.destroy = unx_destroy,
- .hash_cred = unx_hash_cred,
.lookup_cred = unx_lookup_cred,
- .crcreate = unx_create_cred,
};
static
struct rpc_auth unix_auth = {
.au_cslack = UNX_CALLSLACK,
.au_rslack = NUL_REPLYSLACK,
- .au_flags = RPCAUTH_AUTH_NO_CRKEY_TIMEOUT,
.au_ops = &authunix_ops,
.au_flavor = RPC_AUTH_UNIX,
.au_count = REFCOUNT_INIT(1),
const struct rpc_credops unix_credops = {
.cr_name = "AUTH_UNIX",
.crdestroy = unx_destroy_cred,
- .crbind = rpcauth_generic_bind_cred,
.crmatch = unx_match,
.crmarshal = unx_marshal,
.crrefresh = unx_refresh,
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