mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-14 13:06:45 +07:00
c135e84afb
On Wed, 29 Sep 2010 14:02:38 +1000 Stephen Rothwell <sfr@canb.auug.org.au> wrote:
>
> After merging the final tree, today's linux-next build (powerpc
> ppc44x_defconfig) produced tis warning:
>
> WARNING: net/sunrpc/sunrpc.o(.init.text+0x110): Section mismatch in reference from the function init_sunrpc() to the function .exit.text:rpcauth_remove_module()
> The function __init init_sunrpc() references
> a function __exit rpcauth_remove_module().
> This is often seen when error handling in the init function
> uses functionality in the exit path.
> The fix is often to remove the __exit annotation of
> rpcauth_remove_module() so it may be used outside an exit section.
>
> Probably caused by commit 2f72c9b737
> ("sunrpc: The per-net skeleton").
This actually causes a build failure on a sparc32 defconfig build:
`rpcauth_remove_module' referenced in section `.init.text' of net/built-in.o: defined in discarded section `.exit.text' of net/built-in.o
I applied the following patch for today:
Fixes:
`rpcauth_remove_module' referenced in section `.init.text' of net/built-in.o: defined in discarded section `.exit.text' of net/built-in.o
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
184 lines
4.5 KiB
C
184 lines
4.5 KiB
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>
|
|
|
|
#ifdef RPC_DEBUG
|
|
# define RPCDBG_FACILITY RPCDBG_AUTH
|
|
#endif
|
|
|
|
#define RPC_MACHINE_CRED_USERID ((uid_t)0)
|
|
#define RPC_MACHINE_CRED_GROUPID ((gid_t)0)
|
|
|
|
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);
|
|
}
|
|
EXPORT_SYMBOL_GPL(rpc_lookup_cred);
|
|
|
|
/*
|
|
* Public call interface for looking up machine creds.
|
|
*/
|
|
struct rpc_cred *rpc_lookup_machine_cred(void)
|
|
{
|
|
struct auth_cred acred = {
|
|
.uid = RPC_MACHINE_CRED_USERID,
|
|
.gid = RPC_MACHINE_CRED_GROUPID,
|
|
.machine_cred = 1,
|
|
};
|
|
|
|
dprintk("RPC: looking up machine cred\n");
|
|
return generic_auth.au_ops->lookup_cred(&generic_auth, &acred, 0);
|
|
}
|
|
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);
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
}
|
|
|
|
static struct rpc_cred *
|
|
generic_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
|
|
{
|
|
struct generic_cred *gcred;
|
|
|
|
gcred = kmalloc(sizeof(*gcred), GFP_KERNEL);
|
|
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;
|
|
if (gcred->acred.group_info != NULL)
|
|
get_group_info(gcred->acred.group_info);
|
|
gcred->acred.machine_cred = acred->machine_cred;
|
|
|
|
dprintk("RPC: allocated %s cred %p for uid %d gid %d\n",
|
|
gcred->acred.machine_cred ? "machine" : "generic",
|
|
gcred, acred->uid, acred->gid);
|
|
return &gcred->gc_base;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
static void
|
|
generic_destroy_cred(struct rpc_cred *cred)
|
|
{
|
|
call_rcu(&cred->cr_rcu, generic_free_cred_callback);
|
|
}
|
|
|
|
/*
|
|
* 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 (gcred->acred.uid != acred->uid ||
|
|
gcred->acred.gid != acred->gid ||
|
|
gcred->acred.machine_cred != acred->machine_cred)
|
|
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 (GROUP_AT(gcred->acred.group_info, i) !=
|
|
GROUP_AT(acred->group_info, i))
|
|
goto out_nomatch;
|
|
}
|
|
out_match:
|
|
return 1;
|
|
out_nomatch:
|
|
return 0;
|
|
}
|
|
|
|
int __init rpc_init_generic_auth(void)
|
|
{
|
|
return rpcauth_init_credcache(&generic_auth);
|
|
}
|
|
|
|
void rpc_destroy_generic_auth(void)
|
|
{
|
|
rpcauth_destroy_credcache(&generic_auth);
|
|
}
|
|
|
|
static const struct rpc_authops generic_auth_ops = {
|
|
.owner = THIS_MODULE,
|
|
.au_name = "Generic",
|
|
.lookup_cred = generic_lookup_cred,
|
|
.crcreate = generic_create_cred,
|
|
};
|
|
|
|
static struct rpc_auth generic_auth = {
|
|
.au_ops = &generic_auth_ops,
|
|
.au_count = ATOMIC_INIT(0),
|
|
};
|
|
|
|
static const struct rpc_credops generic_credops = {
|
|
.cr_name = "Generic cred",
|
|
.crdestroy = generic_destroy_cred,
|
|
.crbind = generic_bind_cred,
|
|
.crmatch = generic_match,
|
|
};
|