Release 4.15 net/sunrpc/auth_generic.c
/*
* Generic RPC credential
*
* Copyright (C) 2008, Trond Myklebust <Trond.Myklebust@netapp.com>
*/
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/sunrpc/auth.h>
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/debug.h>
#include <linux/sunrpc/sched.h>
#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
# define RPCDBG_FACILITY RPCDBG_AUTH
#endif
#define RPC_MACHINE_CRED_USERID GLOBAL_ROOT_UID
#define RPC_MACHINE_CRED_GROUPID GLOBAL_ROOT_GID
struct generic_cred {
struct rpc_cred gc_base;
struct auth_cred acred;
};
static struct rpc_auth generic_auth;
static const struct rpc_credops generic_credops;
/*
* Public call interface
*/
struct rpc_cred *rpc_lookup_cred(void)
{
return rpcauth_lookupcred(&generic_auth, 0);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Trond Myklebust | 18 | 100.00% | 1 | 100.00% |
| Total | 18 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL_GPL(rpc_lookup_cred);
struct rpc_cred *
rpc_lookup_generic_cred(struct auth_cred *acred, int flags, gfp_t gfp)
{
return rpcauth_lookup_credcache(&generic_auth, acred, flags, gfp);
}
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| Weston Andros Adamson | 31 | 100.00% | 1 | 100.00% |
| Total | 31 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL_GPL(rpc_lookup_generic_cred);
struct rpc_cred *rpc_lookup_cred_nonblock(void)
{
return rpcauth_lookupcred(&generic_auth, RPCAUTH_LOOKUP_RCU);
}
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| Neil Brown | 18 | 100.00% | 1 | 100.00% |
| Total | 18 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL_GPL(rpc_lookup_cred_nonblock);
/*
* Public call interface for looking up machine creds.
*/
struct rpc_cred *rpc_lookup_machine_cred(const char *service_name)
{
struct auth_cred acred = {
.uid = RPC_MACHINE_CRED_USERID,
.gid = RPC_MACHINE_CRED_GROUPID,
.principal = service_name,
.machine_cred = 1,
};
dprintk("RPC: looking up machine cred for service %s\n",
service_name);
return generic_auth.au_ops->lookup_cred(&generic_auth, &acred, 0);
}
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| Trond Myklebust | 61 | 100.00% | 3 | 100.00% |
| Total | 61 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL_GPL(rpc_lookup_machine_cred);
static struct rpc_cred *generic_bind_cred(struct rpc_task *task,
struct rpc_cred *cred, int lookupflags)
{
struct rpc_auth *auth = task->tk_client->cl_auth;
struct auth_cred *acred = &container_of(cred, struct generic_cred, gc_base)->acred;
return auth->au_ops->lookup_cred(auth, acred, lookupflags);
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Trond Myklebust | 64 | 100.00% | 3 | 100.00% |
| Total | 64 | 100.00% | 3 | 100.00% |
static int
generic_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);
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Frank Sorenson | 55 | 100.00% | 1 | 100.00% |
| Total | 55 | 100.00% | 1 | 100.00% |
/*
* Lookup generic creds for current process
*/
static struct rpc_cred *
generic_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
{
return rpcauth_lookup_credcache(&generic_auth, acred, flags, GFP_KERNEL);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Trond Myklebust | 32 | 94.12% | 1 | 50.00% |
| Jeff Layton | 2 | 5.88% | 1 | 50.00% |
| Total | 34 | 100.00% | 2 | 100.00% |
static struct rpc_cred *
generic_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags, gfp_t gfp)
{
struct generic_cred *gcred;
gcred = kmalloc(sizeof(*gcred), gfp);
if (gcred == NULL)
return ERR_PTR(-ENOMEM);
rpcauth_init_cred(&gcred->gc_base, acred, &generic_auth, &generic_credops);
gcred->gc_base.cr_flags = 1UL << RPCAUTH_CRED_UPTODATE;
gcred->acred.uid = acred->uid;
gcred->acred.gid = acred->gid;
gcred->acred.group_info = acred->group_info;
gcred->acred.ac_flags = 0;
if (gcred->acred.group_info != NULL)
get_group_info(gcred->acred.group_info);
gcred->acred.machine_cred = acred->machine_cred;
gcred->acred.principal = acred->principal;
dprintk("RPC: allocated %s cred %p for uid %d gid %d\n",
gcred->acred.machine_cred ? "machine" : "generic",
gcred,
from_kuid(&init_user_ns, acred->uid),
from_kgid(&init_user_ns, acred->gid));
return &gcred->gc_base;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Trond Myklebust | 177 | 88.06% | 3 | 50.00% |
| Eric W. Biedermann | 12 | 5.97% | 1 | 16.67% |
| Andy Adamson | 8 | 3.98% | 1 | 16.67% |
| Jeff Layton | 4 | 1.99% | 1 | 16.67% |
| Total | 201 | 100.00% | 6 | 100.00% |
static void
generic_free_cred(struct rpc_cred *cred)
{
struct generic_cred *gcred = container_of(cred, struct generic_cred, gc_base);
dprintk("RPC: generic_free_cred %p\n", gcred);
if (gcred->acred.group_info != NULL)
put_group_info(gcred->acred.group_info);
kfree(gcred);
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Trond Myklebust | 57 | 100.00% | 1 | 100.00% |
| Total | 57 | 100.00% | 1 | 100.00% |
static void
generic_free_cred_callback(struct rcu_head *head)
{
struct rpc_cred *cred = container_of(head, struct rpc_cred, cr_rcu);
generic_free_cred(cred);
}
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| Trond Myklebust | 31 | 100.00% | 1 | 100.00% |
| Total | 31 | 100.00% | 1 | 100.00% |
static void
generic_destroy_cred(struct rpc_cred *cred)
{
call_rcu(&cred->cr_rcu, generic_free_cred_callback);
}
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| Trond Myklebust | 21 | 100.00% | 1 | 100.00% |
| Total | 21 | 100.00% | 1 | 100.00% |
static int
machine_cred_match(struct auth_cred *acred, struct generic_cred *gcred, int flags)
{
if (!gcred->acred.machine_cred ||
gcred->acred.principal != acred->principal ||
!uid_eq(gcred->acred.uid, acred->uid) ||
!gid_eq(gcred->acred.gid, acred->gid))
return 0;
return 1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Trond Myklebust | 62 | 86.11% | 1 | 50.00% |
| Eric W. Biedermann | 10 | 13.89% | 1 | 50.00% |
| Total | 72 | 100.00% | 2 | 100.00% |
/*
* Match credentials against current process creds.
*/
static int
generic_match(struct auth_cred *acred, struct rpc_cred *cred, int flags)
{
struct generic_cred *gcred = container_of(cred, struct generic_cred, gc_base);
int i;
if (acred->machine_cred)
return machine_cred_match(acred, gcred, flags);
if (!uid_eq(gcred->acred.uid, acred->uid) ||
!gid_eq(gcred->acred.gid, acred->gid) ||
gcred->acred.machine_cred != 0)
goto out_nomatch;
/* Optimisation in the case where pointers are identical... */
if (gcred->acred.group_info == acred->group_info)
goto out_match;
/* Slow path... */
if (gcred->acred.group_info->ngroups != acred->group_info->ngroups)
goto out_nomatch;
for (i = 0; i < gcred->acred.group_info->ngroups; i++) {
if (!gid_eq(gcred->acred.group_info->gid[i],
acred->group_info->gid[i]))
goto out_nomatch;
}
out_match:
return 1;
out_nomatch:
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Trond Myklebust | 167 | 87.89% | 4 | 57.14% |
| Eric W. Biedermann | 15 | 7.89% | 2 | 28.57% |
| Alexey Dobriyan | 8 | 4.21% | 1 | 14.29% |
| Total | 190 | 100.00% | 7 | 100.00% |
int __init rpc_init_generic_auth(void)
{
return rpcauth_init_credcache(&generic_auth);
}
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| Trond Myklebust | 15 | 100.00% | 2 | 100.00% |
| Total | 15 | 100.00% | 2 | 100.00% |
void rpc_destroy_generic_auth(void)
{
rpcauth_destroy_credcache(&generic_auth);
}
Contributors
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| Trond Myklebust | 13 | 100.00% | 2 | 100.00% |
| Total | 13 | 100.00% | 2 | 100.00% |
/*
* Test the the current time (now) against the underlying credential key expiry
* minus a timeout and setup notification.
*
* The normal case:
* If 'now' is before the key expiry minus RPC_KEY_EXPIRE_TIMEO, set
* the RPC_CRED_NOTIFY_TIMEOUT flag to setup the underlying credential
* rpc_credops crmatch routine to notify this generic cred when it's key
* expiration is within RPC_KEY_EXPIRE_TIMEO, and return 0.
*
* The error case:
* If the underlying cred lookup fails, return -EACCES.
*
* The 'almost' error case:
* If 'now' is within key expiry minus RPC_KEY_EXPIRE_TIMEO, but not within
* key expiry minus RPC_KEY_EXPIRE_FAIL, set the RPC_CRED_EXPIRE_SOON bit
* on the acred ac_flags and return 0.
*/
static int
generic_key_timeout(struct rpc_auth *auth, struct rpc_cred *cred)
{
struct auth_cred *acred = &container_of(cred, struct generic_cred,
gc_base)->acred;
struct rpc_cred *tcred;
int ret = 0;
/* Fast track for non crkey_timeout (no key) underlying credentials */
if (auth->au_flags & RPCAUTH_AUTH_NO_CRKEY_TIMEOUT)
return 0;
/* Fast track for the normal case */
if (test_bit(RPC_CRED_NOTIFY_TIMEOUT, &acred->ac_flags))
return 0;
/* lookup_cred either returns a valid referenced rpc_cred, or PTR_ERR */
tcred = auth->au_ops->lookup_cred(auth, acred, 0);
if (IS_ERR(tcred))
return -EACCES;
/* Test for the almost error case */
ret = tcred->cr_ops->crkey_timeout(tcred);
if (ret != 0) {
set_bit(RPC_CRED_KEY_EXPIRE_SOON, &acred->ac_flags);
ret = 0;
} else {
/* In case underlying cred key has been reset */
if (test_and_clear_bit(RPC_CRED_KEY_EXPIRE_SOON,
&acred->ac_flags))
dprintk("RPC: UID %d Credential key reset\n",
from_kuid(&init_user_ns, tcred->cr_uid));
/* set up fasttrack for the normal case */
set_bit(RPC_CRED_NOTIFY_TIMEOUT, &acred->ac_flags);
}
put_rpccred(tcred);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Andy Adamson | 173 | 94.54% | 1 | 33.33% |
| Geert Uytterhoeven | 6 | 3.28% | 1 | 33.33% |
| Scott Mayhew | 4 | 2.19% | 1 | 33.33% |
| Total | 183 | 100.00% | 3 | 100.00% |
static const struct rpc_authops generic_auth_ops = {
.owner = THIS_MODULE,
.au_name = "Generic",
.hash_cred = generic_hash_cred,
.lookup_cred = generic_lookup_cred,
.crcreate = generic_create_cred,
.key_timeout = generic_key_timeout,
};
static struct rpc_auth generic_auth = {
.au_ops = &generic_auth_ops,
.au_count = ATOMIC_INIT(0),
};
static bool generic_key_to_expire(struct rpc_cred *cred)
{
struct auth_cred *acred = &container_of(cred, struct generic_cred,
gc_base)->acred;
bool ret;
get_rpccred(cred);
ret = test_bit(RPC_CRED_KEY_EXPIRE_SOON, &acred->ac_flags);
put_rpccred(cred);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Andy Adamson | 57 | 100.00% | 1 | 100.00% |
| Total | 57 | 100.00% | 1 | 100.00% |
static const struct rpc_credops generic_credops = {
.cr_name = "Generic cred",
.crdestroy = generic_destroy_cred,
.crbind = generic_bind_cred,
.crmatch = generic_match,
.crkey_to_expire = generic_key_to_expire,
};
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Trond Myklebust | 870 | 66.41% | 10 | 41.67% |
| Andy Adamson | 249 | 19.01% | 1 | 4.17% |
| Frank Sorenson | 60 | 4.58% | 1 | 4.17% |
| Eric W. Biedermann | 39 | 2.98% | 4 | 16.67% |
| Weston Andros Adamson | 36 | 2.75% | 1 | 4.17% |
| Neil Brown | 23 | 1.76% | 1 | 4.17% |
| Jeff Layton | 12 | 0.92% | 2 | 8.33% |
| Alexey Dobriyan | 8 | 0.61% | 1 | 4.17% |
| Geert Uytterhoeven | 6 | 0.46% | 1 | 4.17% |
| Scott Mayhew | 4 | 0.31% | 1 | 4.17% |
| Tejun Heo | 3 | 0.23% | 1 | 4.17% |
| Total | 1310 | 100.00% | 24 | 100.00% |
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