mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-30 09:06:44 +07:00
9a559efd41
Add an rpc credential that is not tied to any particular auth mechanism, but that can be cached by NFS, and later used to look up a cred for whichever auth mechanism that turns out to be valid when the RPC call is being made. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
143 lines
3.3 KiB
C
143 lines
3.3 KiB
C
/*
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* Generic RPC credential
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*
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* Copyright (C) 2008, Trond Myklebust <Trond.Myklebust@netapp.com>
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*/
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#include <linux/err.h>
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#include <linux/types.h>
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#include <linux/module.h>
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#include <linux/sched.h>
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#include <linux/sunrpc/auth.h>
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#include <linux/sunrpc/clnt.h>
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#include <linux/sunrpc/debug.h>
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#include <linux/sunrpc/sched.h>
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#ifdef RPC_DEBUG
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# define RPCDBG_FACILITY RPCDBG_AUTH
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#endif
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struct generic_cred {
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struct rpc_cred gc_base;
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struct auth_cred acred;
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};
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static struct rpc_auth generic_auth;
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static struct rpc_cred_cache generic_cred_cache;
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static const struct rpc_credops generic_credops;
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/*
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* Public call interface
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*/
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struct rpc_cred *rpc_lookup_cred(void)
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{
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return rpcauth_lookupcred(&generic_auth, 0);
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}
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EXPORT_SYMBOL_GPL(rpc_lookup_cred);
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/*
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* Lookup generic creds for current process
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*/
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static struct rpc_cred *
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generic_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
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{
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return rpcauth_lookup_credcache(&generic_auth, acred, flags);
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}
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static struct rpc_cred *
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generic_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
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{
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struct generic_cred *gcred;
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gcred = kmalloc(sizeof(*gcred), GFP_KERNEL);
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if (gcred == NULL)
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return ERR_PTR(-ENOMEM);
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rpcauth_init_cred(&gcred->gc_base, acred, &generic_auth, &generic_credops);
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gcred->gc_base.cr_flags = 1UL << RPCAUTH_CRED_UPTODATE;
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gcred->acred.uid = acred->uid;
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gcred->acred.gid = acred->gid;
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gcred->acred.group_info = acred->group_info;
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if (gcred->acred.group_info != NULL)
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get_group_info(gcred->acred.group_info);
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dprintk("RPC: allocated generic cred %p for uid %d gid %d\n",
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gcred, acred->uid, acred->gid);
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return &gcred->gc_base;
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}
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static void
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generic_free_cred(struct rpc_cred *cred)
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{
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struct generic_cred *gcred = container_of(cred, struct generic_cred, gc_base);
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dprintk("RPC: generic_free_cred %p\n", gcred);
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if (gcred->acred.group_info != NULL)
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put_group_info(gcred->acred.group_info);
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kfree(gcred);
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}
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static void
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generic_free_cred_callback(struct rcu_head *head)
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{
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struct rpc_cred *cred = container_of(head, struct rpc_cred, cr_rcu);
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generic_free_cred(cred);
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}
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static void
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generic_destroy_cred(struct rpc_cred *cred)
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{
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call_rcu(&cred->cr_rcu, generic_free_cred_callback);
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}
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/*
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* Match credentials against current process creds.
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*/
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static int
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generic_match(struct auth_cred *acred, struct rpc_cred *cred, int flags)
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{
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struct generic_cred *gcred = container_of(cred, struct generic_cred, gc_base);
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if (gcred->acred.uid != acred->uid ||
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gcred->acred.gid != acred->gid ||
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gcred->acred.group_info != acred->group_info)
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return 0;
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return 1;
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}
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void __init rpc_init_generic_auth(void)
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{
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spin_lock_init(&generic_cred_cache.lock);
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}
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void __exit rpc_destroy_generic_auth(void)
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{
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rpcauth_clear_credcache(&generic_cred_cache);
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}
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static struct rpc_cred_cache generic_cred_cache = {
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{{ NULL, },},
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};
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static const struct rpc_authops generic_auth_ops = {
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.owner = THIS_MODULE,
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#ifdef RPC_DEBUG
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.au_name = "Generic",
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#endif
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.lookup_cred = generic_lookup_cred,
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.crcreate = generic_create_cred,
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};
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static struct rpc_auth generic_auth = {
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.au_ops = &generic_auth_ops,
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.au_count = ATOMIC_INIT(0),
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.au_credcache = &generic_cred_cache,
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};
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static const struct rpc_credops generic_credops = {
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.cr_name = "Generic cred",
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.crdestroy = generic_destroy_cred,
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.crmatch = generic_match,
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};
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