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sunrpc: add a new "stringify_acceptor" rpc_credop 

...and add an new rpc_auth function to call it when it exists. This
is only applicable for AUTH_GSS mechanisms, so we only specify this
for those sorts of credentials.

Signed-off-by: Jeff Layton <jlayton@poochiereds.net>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Jeff Layton 2014-06-21 20:52:16 -04:00 committed by Trond Myklebust
parent 2004c726b9
commit a0337d1ddb
3 changed files with 53 additions and 20 deletions
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2
include/linux/sunrpc/auth.h
View File

@ -140,6 +140,7 @@ struct rpc_credops {
void *, __be32 *, void *);
int (*crkey_timeout)(struct rpc_cred *);
bool (*crkey_to_expire)(struct rpc_cred *);
char * (*crstringify_acceptor)(struct rpc_cred *);
};
extern const struct rpc_authops authunix_ops;
@ -182,6 +183,7 @@ void rpcauth_clear_credcache(struct rpc_cred_cache *);
int rpcauth_key_timeout_notify(struct rpc_auth *,
struct rpc_cred *);
bool rpcauth_cred_key_to_expire(struct rpc_cred *);
char * rpcauth_stringify_acceptor(struct rpc_cred *);
static inline
struct rpc_cred * get_rpccred(struct rpc_cred *cred)

9
net/sunrpc/auth.c
View File

@ -363,6 +363,15 @@ rpcauth_cred_key_to_expire(struct rpc_cred *cred)
}
EXPORT_SYMBOL_GPL(rpcauth_cred_key_to_expire);
char *
rpcauth_stringify_acceptor(struct rpc_cred *cred)
{
if (!cred->cr_ops->crstringify_acceptor)
return NULL;
return cred->cr_ops->crstringify_acceptor(cred);
}
EXPORT_SYMBOL_GPL(rpcauth_stringify_acceptor);
/*
* Destroy a list of credentials
*/

62
net/sunrpc/auth_gss/auth_gss.c
View File

@ -1346,6 +1346,26 @@ gss_cred_init(struct rpc_auth *auth, struct rpc_cred *cred)
return err;
}
static char *
gss_stringify_acceptor(struct rpc_cred *cred)
{
char *string;
struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base);
struct xdr_netobj *acceptor = &gss_cred->gc_ctx->gc_acceptor;
/* no point if there's no string */
if (!acceptor->len)
return NULL;
string = kmalloc(acceptor->len + 1, GFP_KERNEL);
if (!string)
return string;
memcpy(string, acceptor->data, acceptor->len);
string[acceptor->len] = '\0';
return string;
}
/*
* Returns -EACCES if GSS context is NULL or will expire within the
* timeout (miliseconds)
@ -1923,29 +1943,31 @@ static const struct rpc_authops authgss_ops = {
};
static const struct rpc_credops gss_credops = {
.cr_name = "AUTH_GSS",
.crdestroy = gss_destroy_cred,
.cr_init = gss_cred_init,
.crbind = rpcauth_generic_bind_cred,
.crmatch = gss_match,
.crmarshal = gss_marshal,
.crrefresh = gss_refresh,
.crvalidate = gss_validate,
.crwrap_req = gss_wrap_req,
.crunwrap_resp = gss_unwrap_resp,
.crkey_timeout = gss_key_timeout,
.cr_name = "AUTH_GSS",
.crdestroy = gss_destroy_cred,
.cr_init = gss_cred_init,
.crbind = rpcauth_generic_bind_cred,
.crmatch = gss_match,
.crmarshal = gss_marshal,
.crrefresh = gss_refresh,
.crvalidate = gss_validate,
.crwrap_req = gss_wrap_req,
.crunwrap_resp = gss_unwrap_resp,
.crkey_timeout = gss_key_timeout,
.crstringify_acceptor = gss_stringify_acceptor,
};
static const struct rpc_credops gss_nullops = {
.cr_name = "AUTH_GSS",
.crdestroy = gss_destroy_nullcred,
.crbind = rpcauth_generic_bind_cred,
.crmatch = gss_match,
.crmarshal = gss_marshal,
.crrefresh = gss_refresh_null,
.crvalidate = gss_validate,
.crwrap_req = gss_wrap_req,
.crunwrap_resp = gss_unwrap_resp,
.cr_name = "AUTH_GSS",
.crdestroy = gss_destroy_nullcred,
.crbind = rpcauth_generic_bind_cred,
.crmatch = gss_match,
.crmarshal = gss_marshal,
.crrefresh = gss_refresh_null,
.crvalidate = gss_validate,
.crwrap_req = gss_wrap_req,
.crunwrap_resp = gss_unwrap_resp,
.crstringify_acceptor = gss_stringify_acceptor,
};
static const struct rpc_pipe_ops gss_upcall_ops_v0 = {