auth_gss.c revision cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793
11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2f30c2269544bffc7bf1b0d7c0abe5be1be83b8cbUwe Zeisberger * linux/net/sunrpc/auth_gss/auth_gss.c 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * RPCSEC_GSS client authentication. 5cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793YOSHIFUJI Hideaki * 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Copyright (c) 2000 The Regents of the University of Michigan. 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * All rights reserved. 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Dug Song <dugsong@monkey.org> 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Andy Adamson <andros@umich.edu> 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Redistribution and use in source and binary forms, with or without 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * modification, are permitted provided that the following conditions 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * are met: 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1. Redistributions of source code must retain the above copyright 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * notice, this list of conditions and the following disclaimer. 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2. Redistributions in binary form must reproduce the above copyright 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * notice, this list of conditions and the following disclaimer in the 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * documentation and/or other materials provided with the distribution. 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 3. Neither the name of the University nor the names of its 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * contributors may be used to endorse or promote products derived 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * from this software without specific prior written permission. 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * $Id$ 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/module.h> 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/init.h> 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/types.h> 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/slab.h> 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sched.h> 462d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields#include <linux/pagemap.h> 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sunrpc/clnt.h> 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sunrpc/auth.h> 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sunrpc/auth_gss.h> 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sunrpc/svcauth_gss.h> 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sunrpc/gss_err.h> 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/workqueue.h> 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sunrpc/rpc_pipe_fs.h> 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sunrpc/gss_api.h> 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/uaccess.h> 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct rpc_authops authgss_ops; 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct rpc_credops gss_credops; 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef RPC_DEBUG 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds# define RPCDBG_FACILITY RPCDBG_AUTH 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define NFS_NGROUPS 16 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define GSS_CRED_EXPIRE (60 * HZ) /* XXX: reasonable? */ 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define GSS_CRED_SLACK 1024 /* XXX: unused */ 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* length of a krb5 verifier (48), plus data added before arguments when 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * using integrity (two 4-byte integers): */ 71adeb8133dd57f380e70a389a89a2ea3ae227f9e2Olga Kornievskaia#define GSS_VERF_SLACK 100 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* XXX this define must match the gssd define 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds* as it is passed to gssd to signal the use of 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds* machine creds should be part of the shared rpc interface */ 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 77cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793YOSHIFUJI Hideaki#define CA_RUN_AS_MACHINE 0x00000200 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* dump the buffer in `emacs-hexl' style */ 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define isprint(c) ((c > 0x1f) && (c < 0x7f)) 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic DEFINE_RWLOCK(gss_ctx_lock); 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct gss_auth { 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_auth rpc_auth; 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_api_mech *mech; 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds enum rpc_gss_svc service; 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct list_head upcalls; 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_clnt *client; 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dentry *dentry; 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spinlock_t lock; 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void gss_destroy_ctx(struct gss_cl_ctx *); 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct rpc_pipe_ops gss_upcall_ops; 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline struct gss_cl_ctx * 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_get_ctx(struct gss_cl_ctx *ctx) 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_inc(&ctx->count); 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ctx; 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline void 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_put_ctx(struct gss_cl_ctx *ctx) 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (atomic_dec_and_test(&ctx->count)) 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_destroy_ctx(ctx); 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_cred_set_ctx(struct rpc_cred *cred, struct gss_cl_ctx *ctx) 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *old; 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_lock(&gss_ctx_lock); 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds old = gss_cred->gc_ctx; 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_cred->gc_ctx = ctx; 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cred->cr_flags |= RPCAUTH_CRED_UPTODATE; 1208a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebust cred->cr_flags &= ~RPCAUTH_CRED_NEW; 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_unlock(&gss_ctx_lock); 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (old) 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(old); 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_cred_is_uptodate_ctx(struct rpc_cred *cred) 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int res = 0; 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds read_lock(&gss_ctx_lock); 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((cred->cr_flags & RPCAUTH_CRED_UPTODATE) && gss_cred->gc_ctx) 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds res = 1; 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds read_unlock(&gss_ctx_lock); 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return res; 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const void * 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldssimple_get_bytes(const void *p, const void *end, void *res, size_t len) 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const void *q = (const void *)((const char *)p + len); 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely(q > end || q < p)) 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ERR_PTR(-EFAULT); 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(res, p, len); 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return q; 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline const void * 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldssimple_get_netobj(const void *p, const void *end, struct xdr_netobj *dest) 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const void *q; 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int len; 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = simple_get_bytes(p, end, &len, sizeof(len)); 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return p; 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q = (const void *)((const char *)p + len); 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely(q > end || q < p)) 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ERR_PTR(-EFAULT); 161e69062b4f728dca01ec1a9eb4ed55b73a374f164Arnaldo Carvalho de Melo dest->data = kmemdup(p, len, GFP_KERNEL); 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely(dest->data == NULL)) 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ERR_PTR(-ENOMEM); 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dest->len = len; 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return q; 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct gss_cl_ctx * 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_cred_get_ctx(struct rpc_cred *cred) 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx = NULL; 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds read_lock(&gss_ctx_lock); 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_cred->gc_ctx) 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctx = gss_get_ctx(gss_cred->gc_ctx); 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds read_unlock(&gss_ctx_lock); 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ctx; 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct gss_cl_ctx * 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_alloc_context(void) 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx; 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1860da974f4f303a6842516b764507e3c0a03f41e5aPanagiotis Issaris ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctx != NULL) { 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctx->gc_proc = RPC_GSS_PROC_DATA; 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctx->gc_seq = 1; /* NetApp 6.4R1 doesn't accept seq. no. 0 */ 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_init(&ctx->gc_seq_lock); 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_set(&ctx->count,1); 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ctx; 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define GSSD_MIN_TIMEOUT (60 * 60) 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const void * 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_fill_context(const void *p, const void *end, struct gss_cl_ctx *ctx, struct gss_api_mech *gm) 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const void *q; 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int seclen; 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int timeout; 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 window_size; 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ret; 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* First unsigned int gives the lifetime (in seconds) of the cred */ 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = simple_get_bytes(p, end, &timeout, sizeof(timeout)); 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (timeout == 0) 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeout = GSSD_MIN_TIMEOUT; 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctx->gc_expiry = jiffies + (unsigned long)timeout * HZ * 3 / 4; 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Sequence number window. Determines the maximum number of simultaneous requests */ 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = simple_get_bytes(p, end, &window_size, sizeof(window_size)); 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctx->gc_win = window_size; 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* gssd signals an error by passing ctx->gc_win = 0: */ 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctx->gc_win == 0) { 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* in which case, p points to an error code which we ignore */ 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = ERR_PTR(-EACCES); 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* copy the opaque wire context */ 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = simple_get_netobj(p, end, &ctx->gc_wire_ctx); 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* import the opaque security context */ 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = simple_get_bytes(p, end, &seclen, sizeof(seclen)); 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q = (const void *)((const char *)p + seclen); 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely(q > end || q < p)) { 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = ERR_PTR(-EFAULT); 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = gss_import_sec_context(p, seclen, gm, &ctx->gc_gss_ctx); 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ret < 0) { 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = ERR_PTR(ret); 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return q; 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserr: 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: gss_fill_context returning %ld\n", -PTR_ERR(p)); 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return p; 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct gss_upcall_msg { 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_t count; 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds uid_t uid; 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_pipe_msg msg; 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct list_head list; 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_auth *auth; 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_wait_queue rpc_waitqueue; 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wait_queue_head_t waitqueue; 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx; 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_release_msg(struct gss_upcall_msg *gss_msg) 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!atomic_dec_and_test(&gss_msg->count)) 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds BUG_ON(!list_empty(&gss_msg->list)); 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_msg->ctx != NULL) 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(gss_msg->ctx); 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(gss_msg); 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct gss_upcall_msg * 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds__gss_find_upcall(struct gss_auth *gss_auth, uid_t uid) 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *pos; 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(pos, &gss_auth->upcalls, list) { 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (pos->uid != uid) 2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_inc(&pos->count); 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: gss_find_upcall found msg %p\n", pos); 2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return pos; 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: gss_find_upcall found nothing\n"); 2831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 2841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Try to add a upcall to the pipefs queue. 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If an upcall owned by our uid already exists, then we return a reference 2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * to that upcall instead of adding the new upcall. 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline struct gss_upcall_msg * 2911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_add_msg(struct gss_auth *gss_auth, struct gss_upcall_msg *gss_msg) 2921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *old; 2941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock(&gss_auth->lock); 2961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds old = __gss_find_upcall(gss_auth, gss_msg->uid); 2971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (old == NULL) { 2981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_inc(&gss_msg->count); 2991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_add(&gss_msg->list, &gss_auth->upcalls); 3001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else 3011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg = old; 3021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock(&gss_auth->lock); 3031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return gss_msg; 3041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 3071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds__gss_unhash_msg(struct gss_upcall_msg *gss_msg) 3081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (list_empty(&gss_msg->list)) 3101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 3111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_del_init(&gss_msg->list); 3121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 3131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up_all(&gss_msg->waitqueue); 3141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_dec(&gss_msg->count); 3151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 3181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_unhash_msg(struct gss_upcall_msg *gss_msg) 3191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_auth *gss_auth = gss_msg->auth; 3211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock(&gss_auth->lock); 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __gss_unhash_msg(gss_msg); 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock(&gss_auth->lock); 3251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 3281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_upcall_callback(struct rpc_task *task) 3291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(task->tk_msg.rpc_cred, 3311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred, gc_base); 3321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_msg = gss_cred->gc_upcall; 3331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds BUG_ON(gss_msg == NULL); 3351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_msg->ctx) 3361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_cred_set_ctx(task->tk_msg.rpc_cred, gss_get_ctx(gss_msg->ctx)); 3371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds task->tk_status = gss_msg->msg.errno; 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock(&gss_msg->auth->lock); 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_cred->gc_upcall = NULL; 3411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 3421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock(&gss_msg->auth->lock); 3431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_release_msg(gss_msg); 3441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline struct gss_upcall_msg * 3471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_alloc_msg(struct gss_auth *gss_auth, uid_t uid) 3481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_msg; 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3510da974f4f303a6842516b764507e3c0a03f41e5aPanagiotis Issaris gss_msg = kzalloc(sizeof(*gss_msg), GFP_KERNEL); 3521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_msg != NULL) { 3531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD(&gss_msg->list); 3541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rpc_init_wait_queue(&gss_msg->rpc_waitqueue, "RPCSEC_GSS upcall waitq"); 3551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_waitqueue_head(&gss_msg->waitqueue); 3561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_set(&gss_msg->count, 1); 3571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg->msg.data = &gss_msg->uid; 3581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg->msg.len = sizeof(gss_msg->uid); 3591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg->uid = uid; 3601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg->auth = gss_auth; 3611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return gss_msg; 3631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct gss_upcall_msg * 3661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_setup_upcall(struct rpc_clnt *clnt, struct gss_auth *gss_auth, struct rpc_cred *cred) 3671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_new, *gss_msg; 3691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_new = gss_alloc_msg(gss_auth, cred->cr_uid); 3711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_new == NULL) 3721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ERR_PTR(-ENOMEM); 3731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg = gss_add_msg(gss_auth, gss_new); 3741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_msg == gss_new) { 3751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int res = rpc_queue_upcall(gss_auth->dentry->d_inode, &gss_new->msg); 3761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (res) { 3771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_unhash_msg(gss_new); 3781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg = ERR_PTR(res); 3791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else 3811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_release_msg(gss_new); 3821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return gss_msg; 3831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int 3861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_refresh_upcall(struct rpc_task *task) 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_cred *cred = task->tk_msg.rpc_cred; 3891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_auth *gss_auth = container_of(task->tk_client->cl_auth, 3901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_auth, rpc_auth); 3911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(cred, 3921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred, gc_base); 3931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_msg; 3941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err = 0; 3951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: %4u gss_refresh_upcall for uid %u\n", task->tk_pid, cred->cr_uid); 3971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg = gss_setup_upcall(task->tk_client, gss_auth, cred); 3981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(gss_msg)) { 3991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = PTR_ERR(gss_msg); 4001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 4011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock(&gss_auth->lock); 4031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_cred->gc_upcall != NULL) 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rpc_sleep_on(&gss_cred->gc_upcall->rpc_waitqueue, task, NULL, NULL); 4051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (gss_msg->ctx == NULL && gss_msg->msg.errno >= 0) { 4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds task->tk_timeout = 0; 4071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_cred->gc_upcall = gss_msg; 4081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* gss_upcall_callback will release the reference to gss_upcall_msg */ 4091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_inc(&gss_msg->count); 4101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rpc_sleep_on(&gss_msg->rpc_waitqueue, task, gss_upcall_callback, NULL); 4111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else 4121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = gss_msg->msg.errno; 4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock(&gss_auth->lock); 4141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_release_msg(gss_msg); 4151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 4161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: %4u gss_refresh_upcall for uid %u result %d\n", task->tk_pid, 4171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cred->cr_uid, err); 4181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 4191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int 4221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred) 4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_cred *cred = &gss_cred->gc_base; 4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_msg; 4261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DEFINE_WAIT(wait); 4271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err = 0; 4281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: gss_upcall for uid %u\n", cred->cr_uid); 4301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg = gss_setup_upcall(gss_auth->client, gss_auth, cred); 4311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(gss_msg)) { 4321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = PTR_ERR(gss_msg); 4331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 4341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (;;) { 4361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds prepare_to_wait(&gss_msg->waitqueue, &wait, TASK_INTERRUPTIBLE); 4371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock(&gss_auth->lock); 4381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_msg->ctx != NULL || gss_msg->msg.errno < 0) { 4391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock(&gss_auth->lock); 4401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock(&gss_auth->lock); 4431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (signalled()) { 4441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = -ERESTARTSYS; 4451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_intr; 4461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds schedule(); 4481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_msg->ctx) 4501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_cred_set_ctx(cred, gss_get_ctx(gss_msg->ctx)); 4511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = gss_msg->msg.errno; 4531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_intr: 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds finish_wait(&gss_msg->waitqueue, &wait); 4551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_release_msg(gss_msg); 4561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 4571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: gss_create_upcall for uid %u result %d\n", cred->cr_uid, err); 4581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic ssize_t 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_pipe_upcall(struct file *filp, struct rpc_pipe_msg *msg, 4631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char __user *dst, size_t buflen) 4641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char *data = (char *)msg->data + msg->copied; 4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ssize_t mlen = msg->len; 4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ssize_t left; 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mlen > buflen) 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mlen = buflen; 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds left = copy_to_user(dst, data, mlen); 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (left < 0) { 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds msg->errno = left; 4741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return left; 4751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mlen -= left; 4771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds msg->copied += mlen; 4781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds msg->errno = 0; 4791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return mlen; 4801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define MSG_BUF_MAXSIZE 1024 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic ssize_t 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen) 4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const void *p, *end; 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds void *buf; 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_clnt *clnt; 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_auth *gss_auth; 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_cred *cred; 4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_msg; 4931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx; 4941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds uid_t uid; 4951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err = -EFBIG; 4961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mlen > MSG_BUF_MAXSIZE) 4981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = -ENOMEM; 5001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf = kmalloc(mlen, GFP_KERNEL); 5011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!buf) 5021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 5031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 504303b46bb77a4b1679fd39d7ab5597630743e0ff5Josef Sipek clnt = RPC_I(filp->f_path.dentry->d_inode)->private; 5051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = -EFAULT; 5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (copy_from_user(buf, src, mlen)) 5071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 5081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds end = (const void *)((char *)buf + mlen); 5101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = simple_get_bytes(buf, end, &uid, sizeof(uid)); 5111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) { 5121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = PTR_ERR(p); 5131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 5141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = -ENOMEM; 5171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctx = gss_alloc_context(); 5181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctx == NULL) 5191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 5201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = 0; 5211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_auth = container_of(clnt->cl_auth, struct gss_auth, rpc_auth); 5221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = gss_fill_context(p, end, ctx, gss_auth->mech); 5231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) { 5241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = PTR_ERR(p); 5251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err != -EACCES) 5261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err_put_ctx; 5271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock(&gss_auth->lock); 5291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg = __gss_find_upcall(gss_auth, uid); 5301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_msg) { 5311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err == 0 && gss_msg->ctx == NULL) 5321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg->ctx = gss_get_ctx(ctx); 5331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg->msg.errno = err; 5341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __gss_unhash_msg(gss_msg); 5351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock(&gss_auth->lock); 5361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_release_msg(gss_msg); 5371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 5381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct auth_cred acred = { .uid = uid }; 5391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock(&gss_auth->lock); 5408a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebust cred = rpcauth_lookup_credcache(clnt->cl_auth, &acred, RPCAUTH_LOOKUP_NEW); 5411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(cred)) { 5421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = PTR_ERR(cred); 5431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err_put_ctx; 5441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_cred_set_ctx(cred, gss_get_ctx(ctx)); 5461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 5481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(buf); 5491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: gss_pipe_downcall returning length %Zu\n", mlen); 5501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return mlen; 5511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserr_put_ctx: 5521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 5531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserr: 5541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(buf); 5551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 5561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: gss_pipe_downcall returning %d\n", err); 5571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 5581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 5611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_pipe_release(struct inode *inode) 5621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_inode *rpci = RPC_I(inode); 5641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_clnt *clnt; 5651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_auth *auth; 5661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_auth *gss_auth; 5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clnt = rpci->private; 5691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds auth = clnt->cl_auth; 5701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_auth = container_of(auth, struct gss_auth, rpc_auth); 5711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock(&gss_auth->lock); 5721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (!list_empty(&gss_auth->upcalls)) { 5731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_msg; 5741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg = list_entry(gss_auth->upcalls.next, 5761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg, list); 5771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg->msg.errno = -EPIPE; 5781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_inc(&gss_msg->count); 5791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __gss_unhash_msg(gss_msg); 5801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock(&gss_auth->lock); 5811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_release_msg(gss_msg); 5821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock(&gss_auth->lock); 5831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock(&gss_auth->lock); 5851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 5881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_pipe_destroy_msg(struct rpc_pipe_msg *msg) 5891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_msg = container_of(msg, struct gss_upcall_msg, msg); 5911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds static unsigned long ratelimit; 5921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (msg->errno < 0) { 5941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: gss_pipe_destroy_msg releasing msg %p\n", 5951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg); 5961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_inc(&gss_msg->count); 5971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_unhash_msg(gss_msg); 59848e49187753ec3b4fa84a7165c9b7a59f3875b56Trond Myklebust if (msg->errno == -ETIMEDOUT) { 5991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long now = jiffies; 6001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (time_after(now, ratelimit)) { 6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_WARNING "RPC: AUTH_GSS upcall timed out.\n" 6021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "Please check user daemon is running!\n"); 6031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ratelimit = now + 15*HZ; 6041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_release_msg(gss_msg); 6071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 610cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793YOSHIFUJI Hideaki/* 611cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793YOSHIFUJI Hideaki * NOTE: we have the opportunity to use different 6121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * parameters based on the input flavor (which must be a pseudoflavor) 6131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 6141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct rpc_auth * 6151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor) 6161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_auth *gss_auth; 6181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_auth * auth; 6196a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields int err = -ENOMEM; /* XXX? */ 6201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: creating GSS authenticator for client %p\n",clnt); 6221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!try_module_get(THIS_MODULE)) 6246a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields return ERR_PTR(err); 6251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL))) 6261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_dec; 6271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_auth->client = clnt; 6286a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields err = -EINVAL; 6291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_auth->mech = gss_mech_get_by_pseudoflavor(flavor); 6301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!gss_auth->mech) { 6311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_WARNING "%s: Pseudoflavor %d not found!", 6321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FUNCTION__, flavor); 6331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err_free; 6341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_auth->service = gss_pseudoflavor_to_service(gss_auth->mech, flavor); 636438b6fdebf2a2e8573e7290bc176feb4d4475f43J. Bruce Fields if (gss_auth->service == 0) 637438b6fdebf2a2e8573e7290bc176feb4d4475f43J. Bruce Fields goto err_put_mech; 6381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD(&gss_auth->upcalls); 6391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_init(&gss_auth->lock); 6401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds auth = &gss_auth->rpc_auth; 6411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds auth->au_cslack = GSS_CRED_SLACK >> 2; 6421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds auth->au_rslack = GSS_VERF_SLACK >> 2; 6431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds auth->au_ops = &authgss_ops; 6441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds auth->au_flavor = flavor; 6451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_set(&auth->au_count, 1); 6461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6476a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields err = rpcauth_init_credcache(auth, GSS_CRED_EXPIRE); 6486a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields if (err) 6491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err_put_mech; 6501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 651158998b6fe36f6acef087f574c96d44713499cc9Trond Myklebust gss_auth->dentry = rpc_mkpipe(clnt->cl_dentry, gss_auth->mech->gm_name, 652158998b6fe36f6acef087f574c96d44713499cc9Trond Myklebust clnt, &gss_upcall_ops, RPC_PIPE_WAIT_FOR_OPEN); 6536a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields if (IS_ERR(gss_auth->dentry)) { 6546a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields err = PTR_ERR(gss_auth->dentry); 6551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err_put_mech; 6566a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields } 6571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return auth; 6591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserr_put_mech: 6601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_mech_put(gss_auth->mech); 6611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserr_free: 6621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(gss_auth); 6631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_dec: 6641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds module_put(THIS_MODULE); 6656a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields return ERR_PTR(err); 6661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 6691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_destroy(struct rpc_auth *auth) 6701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_auth *gss_auth; 6721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: destroying GSS authenticator %p flavor %d\n", 6741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds auth, auth->au_flavor); 6751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_auth = container_of(auth, struct gss_auth, rpc_auth); 6775d67476fff2df6ff12f60b540fd0e74cf2a668f9Trond Myklebust rpc_unlink(gss_auth->dentry); 67812de3b35ea549c5819f287508d7afab0bf3ac44dTrond Myklebust gss_auth->dentry = NULL; 6791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_mech_put(gss_auth->mech); 6801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rpcauth_free_credcache(auth); 6821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(gss_auth); 6831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds module_put(THIS_MODULE); 6841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* gss_destroy_cred (and gss_destroy_ctx) are used to clean up after failure 6871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * to create a new cred or context, so they check that things have been 6881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * allocated before freeing them. */ 6891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 6901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_destroy_ctx(struct gss_cl_ctx *ctx) 6911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: gss_destroy_ctx\n"); 6931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctx->gc_gss_ctx) 6951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_delete_sec_context(&ctx->gc_gss_ctx); 6961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(ctx->gc_wire_ctx.data); 6981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(ctx); 6991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 7021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_destroy_cred(struct rpc_cred *rc) 7031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *cred = container_of(rc, struct gss_cred, gc_base); 7051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: gss_destroy_cred \n"); 7071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cred->gc_ctx) 7091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(cred->gc_ctx); 7101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(cred); 7111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 7141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Lookup RPCSEC_GSS cred for the current process 7151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 7161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct rpc_cred * 7178a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebustgss_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) 7181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7198a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebust return rpcauth_lookup_credcache(auth, acred, flags); 7201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct rpc_cred * 7238a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebustgss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) 7241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 7261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *cred = NULL; 7271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err = -ENOMEM; 7281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: gss_create_cred for uid %d, flavor %d\n", 7301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds acred->uid, auth->au_flavor); 7311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7320da974f4f303a6842516b764507e3c0a03f41e5aPanagiotis Issaris if (!(cred = kzalloc(sizeof(*cred), GFP_KERNEL))) 7331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_err; 7341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_set(&cred->gc_count, 1); 7361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cred->gc_uid = acred->uid; 7371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 7381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Note: in order to force a call to call_refresh(), we deliberately 7391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * fail to flag the credential as RPCAUTH_CRED_UPTODATE. 7401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 7411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cred->gc_flags = 0; 7421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cred->gc_base.cr_ops = &gss_credops; 7438a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebust cred->gc_base.cr_flags = RPCAUTH_CRED_NEW; 7441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cred->gc_service = gss_auth->service; 7451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return &cred->gc_base; 7461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_err: 7481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: gss_create_cred failed with error %d\n", err); 7491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ERR_PTR(err); 7501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 753fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebustgss_cred_init(struct rpc_auth *auth, struct rpc_cred *cred) 754fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust{ 755fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 756fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust struct gss_cred *gss_cred = container_of(cred,struct gss_cred, gc_base); 757fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust int err; 758fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust 759fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust do { 760fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust err = gss_create_upcall(gss_auth, gss_cred); 761fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust } while (err == -EAGAIN); 762fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust return err; 763fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust} 764fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust 765fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebuststatic int 7668a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebustgss_match(struct auth_cred *acred, struct rpc_cred *rc, int flags) 7671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base); 7691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7708a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebust /* 7718a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebust * If the searchflags have set RPCAUTH_LOOKUP_NEW, then 7728a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebust * we don't really care if the credential has expired or not, 7738a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebust * since the caller should be prepared to reinitialise it. 7748a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebust */ 7758a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebust if ((flags & RPCAUTH_LOOKUP_NEW) && (rc->cr_flags & RPCAUTH_CRED_NEW)) 7768a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebust goto out; 7771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Don't match with creds that have expired. */ 7781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_cred->gc_ctx && time_after(jiffies, gss_cred->gc_ctx->gc_expiry)) 7791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 7808a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebustout: 7811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (rc->cr_uid == acred->uid); 7821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 7851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds* Marshal credentials. 7861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds* Maybe we should keep a cached credential for performance reasons. 7871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds*/ 788d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyanstatic __be32 * 789d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyangss_marshal(struct rpc_task *task, __be32 *p) 7901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_cred *cred = task->tk_msg.rpc_cred; 7921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 7931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gc_base); 7941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 795d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan __be32 *cred_len; 7961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_rqst *req = task->tk_rqstp; 7971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 maj_stat = 0; 7981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_netobj mic; 7991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct kvec iov; 8001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_buf verf_buf; 8011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: %4u gss_marshal\n", task->tk_pid); 8031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *p++ = htonl(RPC_AUTH_GSS); 8051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cred_len = p++; 8061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock(&ctx->gc_seq_lock); 8081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds req->rq_seqno = ctx->gc_seq++; 8091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock(&ctx->gc_seq_lock); 8101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *p++ = htonl((u32) RPC_GSS_VERSION); 8121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *p++ = htonl((u32) ctx->gc_proc); 8131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *p++ = htonl((u32) req->rq_seqno); 8141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *p++ = htonl((u32) gss_cred->gc_service); 8151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = xdr_encode_netobj(p, &ctx->gc_wire_ctx); 8161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *cred_len = htonl((p - (cred_len + 1)) << 2); 8171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We compute the checksum for the verifier over the xdr-encoded bytes 8191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * starting with the xid and ending at the end of the credential: */ 820808012fbb23a52ec59352445d2076d175ad4ab26Chuck Lever iov.iov_base = xprt_skip_transport_header(task->tk_xprt, 821808012fbb23a52ec59352445d2076d175ad4ab26Chuck Lever req->rq_snd_buf.head[0].iov_base); 8221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iov.iov_len = (u8 *)p - (u8 *)iov.iov_base; 8231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 8241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* set verifier flavor*/ 8261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *p++ = htonl(RPC_AUTH_GSS); 8271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mic.data = (u8 *)(p + 1); 82900fd6e14255fe7a249315746386d640bc4e9e758J. Bruce Fields maj_stat = gss_get_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 8301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) { 8311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE; 8321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (maj_stat != 0) { 8331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("gss_marshal: gss_get_mic FAILED (%d)\n", maj_stat); 8341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_put_ctx; 8351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = xdr_encode_opaque(p, NULL, mic.len); 8371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 8381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return p; 8391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_put_ctx: 8401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 8411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 8421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 8451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds* Refresh credentials. XXX - finish 8461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds*/ 8471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 8481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_refresh(struct rpc_task *task) 8491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!gss_cred_is_uptodate_ctx(task->tk_msg.rpc_cred)) 8521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return gss_refresh_upcall(task); 8531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 8541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 856d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyanstatic __be32 * 857d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyangss_validate(struct rpc_task *task, __be32 *p) 8581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_cred *cred = task->tk_msg.rpc_cred; 8601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 861d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan __be32 seq; 8621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct kvec iov; 8631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_buf verf_buf; 8641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_netobj mic; 8651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 flav,len; 8661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 maj_stat; 8671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: %4u gss_validate\n", task->tk_pid); 8691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds flav = ntohl(*p++); 8711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((len = ntohl(*p++)) > RPC_MAX_AUTH_SIZE) 872cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793YOSHIFUJI Hideaki goto out_bad; 8731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (flav != RPC_AUTH_GSS) 8741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_bad; 8751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds seq = htonl(task->tk_rqstp->rq_seqno); 8761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iov.iov_base = &seq; 8771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iov.iov_len = sizeof(seq); 8781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 8791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mic.data = (u8 *)p; 8801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mic.len = len; 8811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 88200fd6e14255fe7a249315746386d640bc4e9e758J. Bruce Fields maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 8831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 8841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE; 8851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (maj_stat) 8861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_bad; 88724b2605becc10ca63c4c30808fa59a8abbf68727J. Bruce Fields /* We leave it to unwrap to calculate au_rslack. For now we just 88824b2605becc10ca63c4c30808fa59a8abbf68727J. Bruce Fields * calculate the length of the verifier: */ 88924b2605becc10ca63c4c30808fa59a8abbf68727J. Bruce Fields task->tk_auth->au_verfsize = XDR_QUADLEN(len) + 2; 8901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 8911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: %4u GSS gss_validate: gss_verify_mic succeeded.\n", 8921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds task->tk_pid); 8931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return p + XDR_QUADLEN(len); 8941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_bad: 8951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 8961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: %4u gss_validate failed.\n", task->tk_pid); 8971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 8981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int 9011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 902d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan kxdrproc_t encode, struct rpc_rqst *rqstp, __be32 *p, void *obj) 9031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 9051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_buf integ_buf; 906d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan __be32 *integ_len = NULL; 9071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_netobj mic; 908d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan u32 offset; 909d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan __be32 *q; 9101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct kvec *iov; 9111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 maj_stat = 0; 9121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = -EIO; 9131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds integ_len = p++; 9151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 9161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *p++ = htonl(rqstp->rq_seqno); 9171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = encode(rqstp, p, obj); 9191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status) 9201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 9211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (xdr_buf_subsegment(snd_buf, &integ_buf, 9231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds offset, snd_buf->len - offset)) 9241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 9251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *integ_len = htonl(integ_buf.len); 9261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* guess whether we're in the head or the tail: */ 928cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793YOSHIFUJI Hideaki if (snd_buf->page_len || snd_buf->tail[0].iov_len) 9291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iov = snd_buf->tail; 9301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 9311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iov = snd_buf->head; 9321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = iov->iov_base + iov->iov_len; 9331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mic.data = (u8 *)(p + 1); 9341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 93500fd6e14255fe7a249315746386d640bc4e9e758J. Bruce Fields maj_stat = gss_get_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 9361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = -EIO; /* XXX? */ 9371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 9381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE; 9391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (maj_stat) 9401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 9411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q = xdr_encode_opaque(p, NULL, mic.len); 9421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds offset = (u8 *)q - (u8 *)p; 9441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iov->iov_len += offset; 9451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds snd_buf->len += offset; 9461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 9471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9492d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsstatic void 9502d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldspriv_release_snd_buf(struct rpc_rqst *rqstp) 9512d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields{ 9522d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields int i; 9532d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 9542d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) 9552d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields __free_page(rqstp->rq_enc_pages[i]); 9562d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields kfree(rqstp->rq_enc_pages); 9572d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields} 9582d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 9592d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsstatic int 9602d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsalloc_enc_pages(struct rpc_rqst *rqstp) 9612d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields{ 9622d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 9632d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields int first, last, i; 9642d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 9652d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (snd_buf->page_len == 0) { 9662d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields rqstp->rq_enc_pages_num = 0; 9672d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return 0; 9682d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields } 9692d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 9702d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields first = snd_buf->page_base >> PAGE_CACHE_SHIFT; 9712d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields last = (snd_buf->page_base + snd_buf->page_len - 1) >> PAGE_CACHE_SHIFT; 9722d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields rqstp->rq_enc_pages_num = last - first + 1 + 1; 9732d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields rqstp->rq_enc_pages 9742d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields = kmalloc(rqstp->rq_enc_pages_num * sizeof(struct page *), 9752d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields GFP_NOFS); 9762d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (!rqstp->rq_enc_pages) 9772d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields goto out; 9782d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) { 9792d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields rqstp->rq_enc_pages[i] = alloc_page(GFP_NOFS); 9802d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (rqstp->rq_enc_pages[i] == NULL) 9812d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields goto out_free; 9822d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields } 9832d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields rqstp->rq_release_snd_buf = priv_release_snd_buf; 9842d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return 0; 9852d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsout_free: 9862d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields for (i--; i >= 0; i--) { 9872d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields __free_page(rqstp->rq_enc_pages[i]); 9882d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields } 9892d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsout: 9902d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return -EAGAIN; 9912d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields} 9922d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 9932d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsstatic inline int 9942d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsgss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 995d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan kxdrproc_t encode, struct rpc_rqst *rqstp, __be32 *p, void *obj) 9962d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields{ 9972d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 9982d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields u32 offset; 9992d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields u32 maj_stat; 10002d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields int status; 1001d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan __be32 *opaque_len; 10022d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields struct page **inpages; 10032d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields int first; 10042d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields int pad; 10052d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields struct kvec *iov; 10062d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields char *tmp; 10072d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 10082d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields opaque_len = p++; 10092d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 10102d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields *p++ = htonl(rqstp->rq_seqno); 10112d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 10122d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields status = encode(rqstp, p, obj); 10132d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (status) 10142d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return status; 10152d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 10162d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields status = alloc_enc_pages(rqstp); 10172d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (status) 10182d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return status; 10192d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields first = snd_buf->page_base >> PAGE_CACHE_SHIFT; 10202d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields inpages = snd_buf->pages + first; 10212d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields snd_buf->pages = rqstp->rq_enc_pages; 10222d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields snd_buf->page_base -= first << PAGE_CACHE_SHIFT; 10232d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields /* Give the tail its own page, in case we need extra space in the 10242d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields * head when wrapping: */ 10252d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) { 10262d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields tmp = page_address(rqstp->rq_enc_pages[rqstp->rq_enc_pages_num - 1]); 10272d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields memcpy(tmp, snd_buf->tail[0].iov_base, snd_buf->tail[0].iov_len); 10282d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields snd_buf->tail[0].iov_base = tmp; 10292d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields } 103000fd6e14255fe7a249315746386d640bc4e9e758J. Bruce Fields maj_stat = gss_wrap(ctx->gc_gss_ctx, offset, snd_buf, inpages); 10312d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields /* RPC_SLACK_SPACE should prevent this ever happening: */ 10322d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields BUG_ON(snd_buf->len > snd_buf->buflen); 1033cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793YOSHIFUJI Hideaki status = -EIO; 10342d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields /* We're assuming that when GSS_S_CONTEXT_EXPIRED, the encryption was 10352d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields * done anyway, so it's safe to put the request on the wire: */ 10362d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 10372d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE; 10382d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields else if (maj_stat) 10392d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return status; 10402d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 10412d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields *opaque_len = htonl(snd_buf->len - offset); 10422d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields /* guess whether we're in the head or the tail: */ 10432d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) 10442d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields iov = snd_buf->tail; 10452d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields else 10462d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields iov = snd_buf->head; 10472d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields p = iov->iov_base + iov->iov_len; 10482d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields pad = 3 - ((snd_buf->len - offset - 1) & 3); 10492d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields memset(p, 0, pad); 10502d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields iov->iov_len += pad; 10512d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields snd_buf->len += pad; 10522d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 10532d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return 0; 10542d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields} 10552d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 10561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 10571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_wrap_req(struct rpc_task *task, 1058d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan kxdrproc_t encode, void *rqstp, __be32 *p, void *obj) 10591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_cred *cred = task->tk_msg.rpc_cred; 10611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 10621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gc_base); 10631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 10641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = -EIO; 10651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: %4u gss_wrap_req\n", task->tk_pid); 10671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) { 10681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The spec seems a little ambiguous here, but I think that not 10691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * wrapping context destruction requests makes the most sense. 10701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = encode(rqstp, p, obj); 10721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 10731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (gss_cred->gc_service) { 10751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case RPC_GSS_SVC_NONE: 10761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = encode(rqstp, p, obj); 10771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 10781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case RPC_GSS_SVC_INTEGRITY: 10791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = gss_wrap_req_integ(cred, ctx, encode, 10801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rqstp, p, obj); 10811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1082cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793YOSHIFUJI Hideaki case RPC_GSS_SVC_PRIVACY: 10832d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields status = gss_wrap_req_priv(cred, ctx, encode, 10842d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields rqstp, p, obj); 10851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 10861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 10881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 10891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: %4u gss_wrap_req returning %d\n", task->tk_pid, status); 10901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 10911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int 10941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_unwrap_resp_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1095d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan struct rpc_rqst *rqstp, __be32 **p) 10961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 10981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_buf integ_buf; 10991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_netobj mic; 11001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 data_offset, mic_offset; 11011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 integ_len; 11021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 maj_stat; 11031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = -EIO; 11041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds integ_len = ntohl(*(*p)++); 11061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (integ_len & 3) 11071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 11081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds data_offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 11091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mic_offset = integ_len + data_offset; 11101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mic_offset > rcv_buf->len) 11111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 11121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ntohl(*(*p)++) != rqstp->rq_seqno) 11131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 11141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (xdr_buf_subsegment(rcv_buf, &integ_buf, data_offset, 11161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mic_offset - data_offset)) 11171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 11181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (xdr_buf_read_netobj(rcv_buf, &mic, mic_offset)) 11201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 11211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 112200fd6e14255fe7a249315746386d640bc4e9e758J. Bruce Fields maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 11231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 11241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE; 11251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (maj_stat != GSS_S_COMPLETE) 11261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 11271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 11281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11302d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsstatic inline int 11312d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsgss_unwrap_resp_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1132d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan struct rpc_rqst *rqstp, __be32 **p) 11332d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields{ 11342d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 11352d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields u32 offset; 11362d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields u32 opaque_len; 11372d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields u32 maj_stat; 11382d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields int status = -EIO; 11392d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 11402d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields opaque_len = ntohl(*(*p)++); 11412d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 11422d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (offset + opaque_len > rcv_buf->len) 11432d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return status; 11442d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields /* remove padding: */ 11452d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields rcv_buf->len = offset + opaque_len; 11462d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 114700fd6e14255fe7a249315746386d640bc4e9e758J. Bruce Fields maj_stat = gss_unwrap(ctx->gc_gss_ctx, offset, rcv_buf); 11482d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 11492d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE; 11502d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (maj_stat != GSS_S_COMPLETE) 11512d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return status; 11522d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (ntohl(*(*p)++) != rqstp->rq_seqno) 11532d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return status; 11542d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 11552d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return 0; 11562d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields} 11572d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 11582d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 11591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 11601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_unwrap_resp(struct rpc_task *task, 1161d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan kxdrproc_t decode, void *rqstp, __be32 *p, void *obj) 11621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_cred *cred = task->tk_msg.rpc_cred; 11641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 11651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gc_base); 11661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1167d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan __be32 *savedp = p; 11682d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields struct kvec *head = ((struct rpc_rqst *)rqstp)->rq_rcv_buf.head; 11692d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields int savedlen = head->iov_len; 11701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = -EIO; 11711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) 11731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_decode; 11741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (gss_cred->gc_service) { 11751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case RPC_GSS_SVC_NONE: 11761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 11771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case RPC_GSS_SVC_INTEGRITY: 11781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = gss_unwrap_resp_integ(cred, ctx, rqstp, &p); 11791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status) 11801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 11811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1182cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793YOSHIFUJI Hideaki case RPC_GSS_SVC_PRIVACY: 11832d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields status = gss_unwrap_resp_priv(cred, ctx, rqstp, &p); 11842d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (status) 11852d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields goto out; 11861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 11871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 118824b2605becc10ca63c4c30808fa59a8abbf68727J. Bruce Fields /* take into account extra slack for integrity and privacy cases: */ 11892d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields task->tk_auth->au_rslack = task->tk_auth->au_verfsize + (p - savedp) 11902d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields + (savedlen - head->iov_len); 11911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_decode: 11921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = decode(rqstp, p, obj); 11931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 11941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 11951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: %4u gss_unwrap_resp returning %d\n", task->tk_pid, 11961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status); 11971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 11981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1199cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793YOSHIFUJI Hideaki 12001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct rpc_authops authgss_ops = { 12011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .owner = THIS_MODULE, 12021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .au_flavor = RPC_AUTH_GSS, 12031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef RPC_DEBUG 12041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .au_name = "RPCSEC_GSS", 12051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 12061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .create = gss_create, 12071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .destroy = gss_destroy, 12081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .lookup_cred = gss_lookup_cred, 12091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crcreate = gss_create_cred 12101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 12111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct rpc_credops gss_credops = { 12131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .cr_name = "AUTH_GSS", 12141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crdestroy = gss_destroy_cred, 1215fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust .cr_init = gss_cred_init, 12161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crmatch = gss_match, 12171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crmarshal = gss_marshal, 12181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crrefresh = gss_refresh, 12191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crvalidate = gss_validate, 12201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crwrap_req = gss_wrap_req, 12211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crunwrap_resp = gss_unwrap_resp, 12221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 12231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct rpc_pipe_ops gss_upcall_ops = { 12251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .upcall = gss_pipe_upcall, 12261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .downcall = gss_pipe_downcall, 12271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .destroy_msg = gss_pipe_destroy_msg, 12281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .release_pipe = gss_pipe_release, 12291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 12301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 12321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Initialize RPCSEC_GSS module 12331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 12341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int __init init_rpcsec_gss(void) 12351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err = 0; 12371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = rpcauth_register(&authgss_ops); 12391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) 12401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 12411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = gss_svc_init(); 12421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) 12431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_unregister; 12441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 12451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_unregister: 12461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rpcauth_unregister(&authgss_ops); 12471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 12481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 12491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void __exit exit_rpcsec_gss(void) 12521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_svc_shutdown(); 12541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rpcauth_unregister(&authgss_ops); 12551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_LICENSE("GPL"); 12581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_init(init_rpcsec_gss) 12591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_exit(exit_rpcsec_gss) 1260