diff options
| -rw-r--r-- | include/linux/sunrpc/auth.h | 3 | ||||
| -rw-r--r-- | net/sunrpc/Makefile | 2 | ||||
| -rw-r--r-- | net/sunrpc/auth.c | 1 | ||||
| -rw-r--r-- | net/sunrpc/auth_generic.c | 142 |
4 files changed, 147 insertions, 1 deletions
diff --git a/include/linux/sunrpc/auth.h b/include/linux/sunrpc/auth.h index 348546c7826c..70644ed67996 100644 --- a/include/linux/sunrpc/auth.h +++ b/include/linux/sunrpc/auth.h @@ -125,9 +125,12 @@ extern const struct rpc_authops authunix_ops; extern const struct rpc_authops authnull_ops; void __init rpc_init_authunix(void); +void __init rpc_init_generic_auth(void); void __init rpcauth_init_module(void); void __exit rpcauth_remove_module(void); +void __exit rpc_destroy_generic_auth(void); +struct rpc_cred * rpc_lookup_cred(void); int rpcauth_register(const struct rpc_authops *); int rpcauth_unregister(const struct rpc_authops *); struct rpc_auth * rpcauth_create(rpc_authflavor_t, struct rpc_clnt *); diff --git a/net/sunrpc/Makefile b/net/sunrpc/Makefile index 92e1dbe50947..5369aa369b35 100644 --- a/net/sunrpc/Makefile +++ b/net/sunrpc/Makefile @@ -8,7 +8,7 @@ obj-$(CONFIG_SUNRPC_GSS) += auth_gss/ obj-$(CONFIG_SUNRPC_XPRT_RDMA) += xprtrdma/ sunrpc-y := clnt.o xprt.o socklib.o xprtsock.o sched.o \ - auth.o auth_null.o auth_unix.o \ + auth.o auth_null.o auth_unix.o auth_generic.o \ svc.o svcsock.o svcauth.o svcauth_unix.o \ rpcb_clnt.o timer.o xdr.o \ sunrpc_syms.o cache.o rpc_pipe.o \ diff --git a/net/sunrpc/auth.c b/net/sunrpc/auth.c index 1cdb163c4f89..012f2a320638 100644 --- a/net/sunrpc/auth.c +++ b/net/sunrpc/auth.c @@ -566,6 +566,7 @@ static struct shrinker rpc_cred_shrinker = { void __init rpcauth_init_module(void) { rpc_init_authunix(); + rpc_init_generic_auth(); register_shrinker(&rpc_cred_shrinker); } diff --git a/net/sunrpc/auth_generic.c b/net/sunrpc/auth_generic.c new file mode 100644 index 000000000000..6f129b1b20a0 --- /dev/null +++ b/net/sunrpc/auth_generic.c @@ -0,0 +1,142 @@ +/* + * Generic RPC credential + * + * Copyright (C) 2008, Trond Myklebust <Trond.Myklebust@netapp.com> + */ + +#include <linux/err.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 + +struct generic_cred { + struct rpc_cred gc_base; + struct auth_cred acred; +}; + +static struct rpc_auth generic_auth; +static struct rpc_cred_cache generic_cred_cache; +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); + +/* + * 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); + + dprintk("RPC: allocated generic cred %p for uid %d gid %d\n", + 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); + + if (gcred->acred.uid != acred->uid || + gcred->acred.gid != acred->gid || + gcred->acred.group_info != acred->group_info) + return 0; + return 1; +} + +void __init rpc_init_generic_auth(void) +{ + spin_lock_init(&generic_cred_cache.lock); +} + +void __exit rpc_destroy_generic_auth(void) +{ + rpcauth_clear_credcache(&generic_cred_cache); +} + +static struct rpc_cred_cache generic_cred_cache = { + {{ NULL, },}, +}; + +static const struct rpc_authops generic_auth_ops = { + .owner = THIS_MODULE, +#ifdef RPC_DEBUG + .au_name = "Generic", +#endif + .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), + .au_credcache = &generic_cred_cache, +}; + +static const struct rpc_credops generic_credops = { + .cr_name = "Generic cred", + .crdestroy = generic_destroy_cred, + .crmatch = generic_match, +}; |