Release 4.15 net/sunrpc/auth_unix.c
// SPDX-License-Identifier: GPL-2.0
/*
* linux/net/sunrpc/auth_unix.c
*
* UNIX-style authentication; no AUTH_SHORT support
*
* Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
*/
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/module.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
#endif
static struct rpc_auth unix_auth;
static const struct rpc_credops unix_credops;
static struct rpc_auth *
unx_create(struct rpc_auth_create_args *args, struct rpc_clnt *clnt)
{
dprintk("RPC: creating UNIX authenticator for client %p\n",
clnt);
atomic_inc(&unix_auth.au_count);
return &unix_auth;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 24 | 64.86% | 1 | 20.00% |
| Trond Myklebust | 12 | 32.43% | 3 | 60.00% |
| Chuck Lever | 1 | 2.70% | 1 | 20.00% |
| Total | 37 | 100.00% | 5 | 100.00% |
static void
unx_destroy(struct rpc_auth *auth)
{
dprintk("RPC: destroying UNIX authenticator %p\n", auth);
rpcauth_clear_credcache(auth->au_credcache);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 21 | 84.00% | 1 | 33.33% |
| Trond Myklebust | 3 | 12.00% | 1 | 33.33% |
| Chuck Lever | 1 | 4.00% | 1 | 33.33% |
| Total | 25 | 100.00% | 3 | 100.00% |
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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Frank Sorenson | 55 | 100.00% | 1 | 100.00% |
| Total | 55 | 100.00% | 1 | 100.00% |
/*
* Lookup AUTH_UNIX creds for current process
*/
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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Trond Myklebust | 31 | 93.94% | 1 | 50.00% |
| Jeff Layton | 2 | 6.06% | 1 | 50.00% |
| Total | 33 | 100.00% | 2 | 100.00% |
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;
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);
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;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 108 | 54.55% | 3 | 15.00% |
| Trond Myklebust | 52 | 26.26% | 8 | 40.00% |
| Eric W. Biedermann | 19 | 9.60% | 3 | 15.00% |
| Alexey Dobriyan | 4 | 2.02% | 1 | 5.00% |
| Jeff Layton | 4 | 2.02% | 1 | 5.00% |
| Linus Torvalds | 4 | 2.02% | 1 | 5.00% |
| Andrew Morton | 3 | 1.52% | 1 | 5.00% |
| Kinglong Mee | 3 | 1.52% | 1 | 5.00% |
| Chuck Lever | 1 | 0.51% | 1 | 5.00% |
| Total | 198 | 100.00% | 20 | 100.00% |
static void
unx_free_cred(struct unx_cred *unx_cred)
{
dprintk("RPC: unx_free_cred %p\n", unx_cred);
kfree(unx_cred);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Trond Myklebust | 18 | 78.26% | 1 | 50.00% |
| Linus Torvalds (pre-git) | 5 | 21.74% | 1 | 50.00% |
| Total | 23 | 100.00% | 2 | 100.00% |
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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Trond Myklebust | 30 | 90.91% | 2 | 66.67% |
| Linus Torvalds (pre-git) | 3 | 9.09% | 1 | 33.33% |
| Total | 33 | 100.00% | 3 | 100.00% |
static void
unx_destroy_cred(struct rpc_cred *cred)
{
call_rcu(&cred->cr_rcu, unx_free_cred_callback);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Trond Myklebust | 17 | 80.95% | 1 | 50.00% |
| Linus Torvalds (pre-git) | 4 | 19.05% | 1 | 50.00% |
| Total | 21 | 100.00% | 2 | 100.00% |
/*
* 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).
*/
static int
unx_match(struct auth_cred *acred, struct rpc_cred *rcred, int flags)
{
struct unx_cred *cred = container_of(rcred, struct unx_cred, uc_base);
unsigned int groups = 0;
unsigned int i;
if (!uid_eq(cred->uc_uid, acred->uid) || !gid_eq(cred->uc_gid, acred->gid))
return 0;
if (acred->group_info != NULL)
groups = acred->group_info->ngroups;
if (groups > UNX_NGROUPS)
groups = UNX_NGROUPS;
for (i = 0; i < groups ; i++)
if (!gid_eq(cred->uc_gids[i], acred->group_info->gid[i]))
return 0;
if (groups < UNX_NGROUPS && gid_valid(cred->uc_gids[groups]))
return 0;
return 1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 75 | 47.17% | 3 | 20.00% |
| Eric W. Biedermann | 30 | 18.87% | 4 | 26.67% |
| Trond Myklebust | 30 | 18.87% | 4 | 26.67% |
| Neil Brown | 15 | 9.43% | 1 | 6.67% |
| Alexey Dobriyan | 4 | 2.52% | 1 | 6.67% |
| Kinglong Mee | 3 | 1.89% | 1 | 6.67% |
| Andrew Morton | 2 | 1.26% | 1 | 6.67% |
| Total | 159 | 100.00% | 15 | 100.00% |
/*
* Marshal credentials.
* Maybe we should keep a cached credential for performance reasons.
*/
static __be32 *
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);
__be32 *base, *hold;
int i;
*p++ = htonl(RPC_AUTH_UNIX);
base = p++;
*p++ = htonl(jiffies/HZ);
/*
* Copy the UTS nodename captured when the client was created.
*/
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));
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]));
*hold = htonl(p - hold - 1); /* gid array length */
*base = htonl((p - base - 1) << 2); /* cred length */
*p++ = htonl(RPC_AUTH_NULL);
*p++ = htonl(0);
return p;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 195 | 82.28% | 2 | 20.00% |
| Eric W. Biedermann | 21 | 8.86% | 2 | 20.00% |
| Trond Myklebust | 17 | 7.17% | 4 | 40.00% |
| Alexey Dobriyan | 3 | 1.27% | 1 | 10.00% |
| Kinglong Mee | 1 | 0.42% | 1 | 10.00% |
| Total | 237 | 100.00% | 10 | 100.00% |
/*
* Refresh credentials. This is a no-op for AUTH_UNIX
*/
static int
unx_refresh(struct rpc_task *task)
{
set_bit(RPCAUTH_CRED_UPTODATE, &task->tk_rqstp->rq_cred->cr_flags);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 18 | 64.29% | 1 | 25.00% |
| Trond Myklebust | 10 | 35.71% | 3 | 75.00% |
| Total | 28 | 100.00% | 4 | 100.00% |
static __be32 *
unx_validate(struct rpc_task *task, __be32 *p)
{
rpc_authflavor_t flavor;
u32 size;
flavor = ntohl(*p++);
if (flavor != RPC_AUTH_NULL &&
flavor != RPC_AUTH_UNIX &&
flavor != RPC_AUTH_SHORT) {
printk("RPC: bad verf flavor: %u\n", flavor);
return ERR_PTR(-EIO);
}
size = ntohl(*p++);
if (size > RPC_MAX_AUTH_SIZE) {
printk("RPC: giant verf size: %u\n", size);
return ERR_PTR(-EIO);
}
task->tk_rqstp->rq_cred->cr_auth->au_rslack = (size >> 2) + 2;
p += (size >> 2);
return p;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 81 | 66.94% | 1 | 14.29% |
| Chuck Lever | 22 | 18.18% | 1 | 14.29% |
| Andy Adamson | 10 | 8.26% | 1 | 14.29% |
| Trond Myklebust | 6 | 4.96% | 3 | 42.86% |
| Alexey Dobriyan | 2 | 1.65% | 1 | 14.29% |
| Total | 121 | 100.00% | 7 | 100.00% |
int __init rpc_init_authunix(void)
{
return rpcauth_init_credcache(&unix_auth);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Trond Myklebust | 15 | 100.00% | 2 | 100.00% |
| Total | 15 | 100.00% | 2 | 100.00% |
void rpc_destroy_authunix(void)
{
rpcauth_destroy_credcache(&unix_auth);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Trond Myklebust | 13 | 100.00% | 2 | 100.00% |
| Total | 13 | 100.00% | 2 | 100.00% |
const struct rpc_authops authunix_ops = {
.owner = THIS_MODULE,
.au_flavor = RPC_AUTH_UNIX,
.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 = ATOMIC_INIT(0),
};
static
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,
.crvalidate = unx_validate,
};
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 597 | 49.71% | 4 | 7.14% |
| Trond Myklebust | 312 | 25.98% | 25 | 44.64% |
| Eric W. Biedermann | 75 | 6.24% | 8 | 14.29% |
| Frank Sorenson | 60 | 5.00% | 1 | 1.79% |
| Dave Jones | 32 | 2.66% | 1 | 1.79% |
| Chuck Lever | 28 | 2.33% | 3 | 5.36% |
| Linus Torvalds | 17 | 1.42% | 2 | 3.57% |
| Neil Brown | 15 | 1.25% | 1 | 1.79% |
| Alexey Dobriyan | 13 | 1.08% | 2 | 3.57% |
| Jeff Layton | 12 | 1.00% | 2 | 3.57% |
| Andy Adamson | 10 | 0.83% | 1 | 1.79% |
| Christoph Hellwig | 8 | 0.67% | 1 | 1.79% |
| Kinglong Mee | 8 | 0.67% | 1 | 1.79% |
| Andrew Morton | 5 | 0.42% | 1 | 1.79% |
| Scott Mayhew | 5 | 0.42% | 1 | 1.79% |
| Tejun Heo | 3 | 0.25% | 1 | 1.79% |
| Greg Kroah-Hartman | 1 | 0.08% | 1 | 1.79% |
| Total | 1201 | 100.00% | 56 | 100.00% |
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