auth_gss.c revision 0df7fb74fbb709591301871a38aac7735a1d6583
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 57f1c0a8615090359d57e096157feb9f900cbb233cTrond Myklebuststatic const struct rpc_authops authgss_ops; 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 59f1c0a8615090359d57e096157feb9f900cbb233cTrond Myklebuststatic const struct rpc_credops gss_credops; 600df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebuststatic const struct rpc_credops gss_nullops; 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef RPC_DEBUG 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds# define RPCDBG_FACILITY RPCDBG_AUTH 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define NFS_NGROUPS 16 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 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 Torvaldsstruct gss_auth { 830285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust struct kref kref; 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_auth rpc_auth; 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_api_mech *mech; 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds enum rpc_gss_svc service; 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_clnt *client; 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dentry *dentry; 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 915d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebuststatic void gss_free_ctx(struct gss_cl_ctx *); 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct rpc_pipe_ops gss_upcall_ops; 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline struct gss_cl_ctx * 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_get_ctx(struct gss_cl_ctx *ctx) 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_inc(&ctx->count); 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ctx; 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline void 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_put_ctx(struct gss_cl_ctx *ctx) 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (atomic_dec_and_test(&ctx->count)) 1055d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust gss_free_ctx(ctx); 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1085d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust/* gss_cred_set_ctx: 1095d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust * called by gss_upcall_callback and gss_create_upcall in order 1105d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust * to set the gss context. The actual exchange of an old context 1115d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust * and a new one is protected by the inode->i_lock. 1125d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust */ 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_cred_set_ctx(struct rpc_cred *cred, struct gss_cl_ctx *ctx) 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *old; 1185d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds old = gss_cred->gc_ctx; 1205d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust rcu_assign_pointer(gss_cred->gc_ctx, ctx); 121fc432dd90760a629c57026e57f65ff80a1a31d2fTrond Myklebust set_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 122fc432dd90760a629c57026e57f65ff80a1a31d2fTrond Myklebust clear_bit(RPCAUTH_CRED_NEW, &cred->cr_flags); 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (old) 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(old); 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_cred_is_uptodate_ctx(struct rpc_cred *cred) 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int res = 0; 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1335d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust rcu_read_lock(); 134fc432dd90760a629c57026e57f65ff80a1a31d2fTrond Myklebust if (test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) && gss_cred->gc_ctx) 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds res = 1; 1365d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust rcu_read_unlock(); 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return res; 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const void * 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldssimple_get_bytes(const void *p, const void *end, void *res, size_t len) 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const void *q = (const void *)((const char *)p + len); 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely(q > end || q < p)) 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ERR_PTR(-EFAULT); 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(res, p, len); 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return q; 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline const void * 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldssimple_get_netobj(const void *p, const void *end, struct xdr_netobj *dest) 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const void *q; 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int len; 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = simple_get_bytes(p, end, &len, sizeof(len)); 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return p; 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q = (const void *)((const char *)p + len); 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely(q > end || q < p)) 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ERR_PTR(-EFAULT); 162e69062b4f728dca01ec1a9eb4ed55b73a374f164Arnaldo Carvalho de Melo dest->data = kmemdup(p, len, GFP_KERNEL); 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely(dest->data == NULL)) 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ERR_PTR(-ENOMEM); 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dest->len = len; 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return q; 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct gss_cl_ctx * 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_cred_get_ctx(struct rpc_cred *cred) 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx = NULL; 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1755d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust rcu_read_lock(); 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_cred->gc_ctx) 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctx = gss_get_ctx(gss_cred->gc_ctx); 1785d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust rcu_read_unlock(); 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ctx; 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct gss_cl_ctx * 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_alloc_context(void) 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx; 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1870da974f4f303a6842516b764507e3c0a03f41e5aPanagiotis Issaris ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctx != NULL) { 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctx->gc_proc = RPC_GSS_PROC_DATA; 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctx->gc_seq = 1; /* NetApp 6.4R1 doesn't accept seq. no. 0 */ 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_init(&ctx->gc_seq_lock); 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_set(&ctx->count,1); 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ctx; 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define GSSD_MIN_TIMEOUT (60 * 60) 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const void * 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_fill_context(const void *p, const void *end, struct gss_cl_ctx *ctx, struct gss_api_mech *gm) 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const void *q; 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int seclen; 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int timeout; 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 window_size; 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ret; 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* First unsigned int gives the lifetime (in seconds) of the cred */ 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = simple_get_bytes(p, end, &timeout, sizeof(timeout)); 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (timeout == 0) 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeout = GSSD_MIN_TIMEOUT; 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctx->gc_expiry = jiffies + (unsigned long)timeout * HZ * 3 / 4; 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Sequence number window. Determines the maximum number of simultaneous requests */ 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = simple_get_bytes(p, end, &window_size, sizeof(window_size)); 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctx->gc_win = window_size; 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* gssd signals an error by passing ctx->gc_win = 0: */ 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctx->gc_win == 0) { 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* in which case, p points to an error code which we ignore */ 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = ERR_PTR(-EACCES); 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* copy the opaque wire context */ 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = simple_get_netobj(p, end, &ctx->gc_wire_ctx); 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* import the opaque security context */ 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = simple_get_bytes(p, end, &seclen, sizeof(seclen)); 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q = (const void *)((const char *)p + seclen); 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely(q > end || q < p)) { 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = ERR_PTR(-EFAULT); 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = gss_import_sec_context(p, seclen, gm, &ctx->gc_gss_ctx); 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ret < 0) { 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = ERR_PTR(ret); 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return q; 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserr: 2458885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: gss_fill_context returning %ld\n", -PTR_ERR(p)); 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return p; 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct gss_upcall_msg { 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_t count; 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds uid_t uid; 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_pipe_msg msg; 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct list_head list; 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_auth *auth; 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_wait_queue rpc_waitqueue; 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wait_queue_head_t waitqueue; 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx; 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 2601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_release_msg(struct gss_upcall_msg *gss_msg) 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!atomic_dec_and_test(&gss_msg->count)) 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds BUG_ON(!list_empty(&gss_msg->list)); 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_msg->ctx != NULL) 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(gss_msg->ctx); 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(gss_msg); 2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct gss_upcall_msg * 2736e84c7b66a0aa0be16a7728d1e687c57978dac2cTrond Myklebust__gss_find_upcall(struct rpc_inode *rpci, uid_t uid) 2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *pos; 2766e84c7b66a0aa0be16a7728d1e687c57978dac2cTrond Myklebust list_for_each_entry(pos, &rpci->in_downcall, list) { 2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (pos->uid != uid) 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_inc(&pos->count); 2808885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: gss_find_upcall found msg %p\n", pos); 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return pos; 2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2838885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: gss_find_upcall found nothing\n"); 2841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 2851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Try to add a upcall to the pipefs queue. 2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If an upcall owned by our uid already exists, then we return a reference 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * to that upcall instead of adding the new upcall. 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline struct gss_upcall_msg * 2921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_add_msg(struct gss_auth *gss_auth, struct gss_upcall_msg *gss_msg) 2931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 294b185f835e243e654047ae85f42346827d3894171Trond Myklebust struct inode *inode = gss_auth->dentry->d_inode; 2956e84c7b66a0aa0be16a7728d1e687c57978dac2cTrond Myklebust struct rpc_inode *rpci = RPC_I(inode); 2961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *old; 2971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 298b185f835e243e654047ae85f42346827d3894171Trond Myklebust spin_lock(&inode->i_lock); 2996e84c7b66a0aa0be16a7728d1e687c57978dac2cTrond Myklebust old = __gss_find_upcall(rpci, gss_msg->uid); 3001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (old == NULL) { 3011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_inc(&gss_msg->count); 3026e84c7b66a0aa0be16a7728d1e687c57978dac2cTrond Myklebust list_add(&gss_msg->list, &rpci->in_downcall); 3031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else 3041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg = old; 305b185f835e243e654047ae85f42346827d3894171Trond Myklebust spin_unlock(&inode->i_lock); 3061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return gss_msg; 3071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 3101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds__gss_unhash_msg(struct gss_upcall_msg *gss_msg) 3111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_del_init(&gss_msg->list); 3131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 3141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up_all(&gss_msg->waitqueue); 3151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_dec(&gss_msg->count); 3161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 3191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_unhash_msg(struct gss_upcall_msg *gss_msg) 3201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_auth *gss_auth = gss_msg->auth; 322b185f835e243e654047ae85f42346827d3894171Trond Myklebust struct inode *inode = gss_auth->dentry->d_inode; 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3243b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust if (list_empty(&gss_msg->list)) 3253b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust return; 326b185f835e243e654047ae85f42346827d3894171Trond Myklebust spin_lock(&inode->i_lock); 3273b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust if (!list_empty(&gss_msg->list)) 3283b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust __gss_unhash_msg(gss_msg); 329b185f835e243e654047ae85f42346827d3894171Trond Myklebust spin_unlock(&inode->i_lock); 3301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 3331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_upcall_callback(struct rpc_task *task) 3341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(task->tk_msg.rpc_cred, 3361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred, gc_base); 3371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_msg = gss_cred->gc_upcall; 338b185f835e243e654047ae85f42346827d3894171Trond Myklebust struct inode *inode = gss_msg->auth->dentry->d_inode; 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3405d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust spin_lock(&inode->i_lock); 3411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_msg->ctx) 3421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_cred_set_ctx(task->tk_msg.rpc_cred, gss_get_ctx(gss_msg->ctx)); 3431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 3441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds task->tk_status = gss_msg->msg.errno; 3451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_cred->gc_upcall = NULL; 3461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 347b185f835e243e654047ae85f42346827d3894171Trond Myklebust spin_unlock(&inode->i_lock); 3481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_release_msg(gss_msg); 3491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline struct gss_upcall_msg * 3521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_alloc_msg(struct gss_auth *gss_auth, uid_t uid) 3531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_msg; 3551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3560da974f4f303a6842516b764507e3c0a03f41e5aPanagiotis Issaris gss_msg = kzalloc(sizeof(*gss_msg), GFP_KERNEL); 3571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_msg != NULL) { 3581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD(&gss_msg->list); 3591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rpc_init_wait_queue(&gss_msg->rpc_waitqueue, "RPCSEC_GSS upcall waitq"); 3601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_waitqueue_head(&gss_msg->waitqueue); 3611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_set(&gss_msg->count, 1); 3621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg->msg.data = &gss_msg->uid; 3631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg->msg.len = sizeof(gss_msg->uid); 3641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg->uid = uid; 3651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg->auth = gss_auth; 3661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return gss_msg; 3681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct gss_upcall_msg * 3711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_setup_upcall(struct rpc_clnt *clnt, struct gss_auth *gss_auth, struct rpc_cred *cred) 3721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_new, *gss_msg; 3741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_new = gss_alloc_msg(gss_auth, cred->cr_uid); 3761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_new == NULL) 3771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ERR_PTR(-ENOMEM); 3781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg = gss_add_msg(gss_auth, gss_new); 3791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_msg == gss_new) { 3801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int res = rpc_queue_upcall(gss_auth->dentry->d_inode, &gss_new->msg); 3811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (res) { 3821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_unhash_msg(gss_new); 3831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg = ERR_PTR(res); 3841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else 3861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_release_msg(gss_new); 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return gss_msg; 3881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int 3911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_refresh_upcall(struct rpc_task *task) 3921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_cred *cred = task->tk_msg.rpc_cred; 3944a8c1344dccb848dbcf0edabc8b5c51a8ecf2808Trond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, 3951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_auth, rpc_auth); 3961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(cred, 3971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred, gc_base); 3981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_msg; 399b185f835e243e654047ae85f42346827d3894171Trond Myklebust struct inode *inode = gss_auth->dentry->d_inode; 4001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err = 0; 4011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4028885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: %5u gss_refresh_upcall for uid %u\n", task->tk_pid, 4038885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever cred->cr_uid); 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg = gss_setup_upcall(task->tk_client, gss_auth, cred); 4051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(gss_msg)) { 4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = PTR_ERR(gss_msg); 4071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 4081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 409b185f835e243e654047ae85f42346827d3894171Trond Myklebust spin_lock(&inode->i_lock); 4101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_cred->gc_upcall != NULL) 4111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rpc_sleep_on(&gss_cred->gc_upcall->rpc_waitqueue, task, NULL, NULL); 4121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (gss_msg->ctx == NULL && gss_msg->msg.errno >= 0) { 4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds task->tk_timeout = 0; 4141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_cred->gc_upcall = gss_msg; 4151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* gss_upcall_callback will release the reference to gss_upcall_msg */ 4161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_inc(&gss_msg->count); 4171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rpc_sleep_on(&gss_msg->rpc_waitqueue, task, gss_upcall_callback, NULL); 4181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else 4191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = gss_msg->msg.errno; 420b185f835e243e654047ae85f42346827d3894171Trond Myklebust spin_unlock(&inode->i_lock); 4211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_release_msg(gss_msg); 4221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 4238885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: %5u gss_refresh_upcall for uid %u result %d\n", 4248885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever task->tk_pid, cred->cr_uid, err); 4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 4261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int 4291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred) 4301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 431b185f835e243e654047ae85f42346827d3894171Trond Myklebust struct inode *inode = gss_auth->dentry->d_inode; 4321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_cred *cred = &gss_cred->gc_base; 4331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_msg; 4341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DEFINE_WAIT(wait); 4351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err = 0; 4361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4378885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: gss_upcall for uid %u\n", cred->cr_uid); 4381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg = gss_setup_upcall(gss_auth->client, gss_auth, cred); 4391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(gss_msg)) { 4401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = PTR_ERR(gss_msg); 4411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 4421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (;;) { 4441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds prepare_to_wait(&gss_msg->waitqueue, &wait, TASK_INTERRUPTIBLE); 445b185f835e243e654047ae85f42346827d3894171Trond Myklebust spin_lock(&inode->i_lock); 4461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_msg->ctx != NULL || gss_msg->msg.errno < 0) { 4471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 449b185f835e243e654047ae85f42346827d3894171Trond Myklebust spin_unlock(&inode->i_lock); 4501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (signalled()) { 4511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = -ERESTARTSYS; 4521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_intr; 4531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds schedule(); 4551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_msg->ctx) 4571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_cred_set_ctx(cred, gss_get_ctx(gss_msg->ctx)); 4581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = gss_msg->msg.errno; 4605d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust spin_unlock(&inode->i_lock); 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_intr: 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds finish_wait(&gss_msg->waitqueue, &wait); 4631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_release_msg(gss_msg); 4641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 4658885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: gss_create_upcall for uid %u result %d\n", 4668885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever cred->cr_uid, err); 4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic ssize_t 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_pipe_upcall(struct file *filp, struct rpc_pipe_msg *msg, 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char __user *dst, size_t buflen) 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char *data = (char *)msg->data + msg->copied; 4751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ssize_t mlen = msg->len; 4761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ssize_t left; 4771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mlen > buflen) 4791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mlen = buflen; 4801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds left = copy_to_user(dst, data, mlen); 4811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (left < 0) { 4821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds msg->errno = left; 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return left; 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mlen -= left; 4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds msg->copied += mlen; 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds msg->errno = 0; 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return mlen; 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define MSG_BUF_MAXSIZE 1024 4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic ssize_t 4941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen) 4951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const void *p, *end; 4971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds void *buf; 4981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_clnt *clnt; 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_msg; 500b185f835e243e654047ae85f42346827d3894171Trond Myklebust struct inode *inode = filp->f_path.dentry->d_inode; 5011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx; 5021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds uid_t uid; 5033b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust ssize_t err = -EFBIG; 5041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mlen > MSG_BUF_MAXSIZE) 5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 5071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = -ENOMEM; 5081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf = kmalloc(mlen, GFP_KERNEL); 5091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!buf) 5101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 5111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 512b185f835e243e654047ae85f42346827d3894171Trond Myklebust clnt = RPC_I(inode)->private; 5131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = -EFAULT; 5141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (copy_from_user(buf, src, mlen)) 5151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 5161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds end = (const void *)((char *)buf + mlen); 5181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = simple_get_bytes(buf, end, &uid, sizeof(uid)); 5191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) { 5201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = PTR_ERR(p); 5211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 5221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = -ENOMEM; 5251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctx = gss_alloc_context(); 5261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctx == NULL) 5271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 5283b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust 5293b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust err = -ENOENT; 5303b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust /* Find a matching upcall */ 5313b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust spin_lock(&inode->i_lock); 5326e84c7b66a0aa0be16a7728d1e687c57978dac2cTrond Myklebust gss_msg = __gss_find_upcall(RPC_I(inode), uid); 5333b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust if (gss_msg == NULL) { 5343b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust spin_unlock(&inode->i_lock); 5353b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust goto err_put_ctx; 5363b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust } 5373b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust list_del_init(&gss_msg->list); 5383b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust spin_unlock(&inode->i_lock); 5393b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust 5406e84c7b66a0aa0be16a7728d1e687c57978dac2cTrond Myklebust p = gss_fill_context(p, end, ctx, gss_msg->auth->mech); 5411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) { 5421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = PTR_ERR(p); 5433b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust gss_msg->msg.errno = (err == -EACCES) ? -EACCES : -EAGAIN; 5443b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust goto err_release_msg; 5451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5463b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust gss_msg->ctx = gss_get_ctx(ctx); 5473b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust err = mlen; 5483b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust 5493b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebusterr_release_msg: 550b185f835e243e654047ae85f42346827d3894171Trond Myklebust spin_lock(&inode->i_lock); 5513b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust __gss_unhash_msg(gss_msg); 5523b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust spin_unlock(&inode->i_lock); 5533b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust gss_release_msg(gss_msg); 5541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserr_put_ctx: 5551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 5561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserr: 5571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(buf); 5581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 5593b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust dprintk("RPC: gss_pipe_downcall returning %Zd\n", err); 5601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 5611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 5641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_pipe_release(struct inode *inode) 5651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_inode *rpci = RPC_I(inode); 5676e84c7b66a0aa0be16a7728d1e687c57978dac2cTrond Myklebust struct gss_upcall_msg *gss_msg; 5681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 569b185f835e243e654047ae85f42346827d3894171Trond Myklebust spin_lock(&inode->i_lock); 5706e84c7b66a0aa0be16a7728d1e687c57978dac2cTrond Myklebust while (!list_empty(&rpci->in_downcall)) { 5711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5726e84c7b66a0aa0be16a7728d1e687c57978dac2cTrond Myklebust gss_msg = list_entry(rpci->in_downcall.next, 5731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg, list); 5741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg->msg.errno = -EPIPE; 5751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_inc(&gss_msg->count); 5761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __gss_unhash_msg(gss_msg); 577b185f835e243e654047ae85f42346827d3894171Trond Myklebust spin_unlock(&inode->i_lock); 5781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_release_msg(gss_msg); 579b185f835e243e654047ae85f42346827d3894171Trond Myklebust spin_lock(&inode->i_lock); 5801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 581b185f835e243e654047ae85f42346827d3894171Trond Myklebust spin_unlock(&inode->i_lock); 5821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 5851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_pipe_destroy_msg(struct rpc_pipe_msg *msg) 5861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_msg = container_of(msg, struct gss_upcall_msg, msg); 5881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds static unsigned long ratelimit; 5891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (msg->errno < 0) { 5918885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: gss_pipe_destroy_msg releasing msg %p\n", 5921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg); 5931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_inc(&gss_msg->count); 5941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_unhash_msg(gss_msg); 59548e49187753ec3b4fa84a7165c9b7a59f3875b56Trond Myklebust if (msg->errno == -ETIMEDOUT) { 5961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long now = jiffies; 5971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (time_after(now, ratelimit)) { 5981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_WARNING "RPC: AUTH_GSS upcall timed out.\n" 5991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "Please check user daemon is running!\n"); 6001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ratelimit = now + 15*HZ; 6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_release_msg(gss_msg); 6041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 607cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793YOSHIFUJI Hideaki/* 608cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793YOSHIFUJI Hideaki * NOTE: we have the opportunity to use different 6091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * parameters based on the input flavor (which must be a pseudoflavor) 6101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 6111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct rpc_auth * 6121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor) 6131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_auth *gss_auth; 6151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_auth * auth; 6166a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields int err = -ENOMEM; /* XXX? */ 6171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6188885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: creating GSS authenticator for client %p\n", clnt); 6191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!try_module_get(THIS_MODULE)) 6216a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields return ERR_PTR(err); 6221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL))) 6231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_dec; 6241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_auth->client = clnt; 6256a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields err = -EINVAL; 6261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_auth->mech = gss_mech_get_by_pseudoflavor(flavor); 6271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!gss_auth->mech) { 6281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_WARNING "%s: Pseudoflavor %d not found!", 6291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FUNCTION__, flavor); 6301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err_free; 6311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_auth->service = gss_pseudoflavor_to_service(gss_auth->mech, flavor); 633438b6fdebf2a2e8573e7290bc176feb4d4475f43J. Bruce Fields if (gss_auth->service == 0) 634438b6fdebf2a2e8573e7290bc176feb4d4475f43J. Bruce Fields goto err_put_mech; 6351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds auth = &gss_auth->rpc_auth; 6361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds auth->au_cslack = GSS_CRED_SLACK >> 2; 6371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds auth->au_rslack = GSS_VERF_SLACK >> 2; 6381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds auth->au_ops = &authgss_ops; 6391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds auth->au_flavor = flavor; 6401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_set(&auth->au_count, 1); 6410285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust kref_init(&gss_auth->kref); 6421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 643158998b6fe36f6acef087f574c96d44713499cc9Trond Myklebust gss_auth->dentry = rpc_mkpipe(clnt->cl_dentry, gss_auth->mech->gm_name, 644158998b6fe36f6acef087f574c96d44713499cc9Trond Myklebust clnt, &gss_upcall_ops, RPC_PIPE_WAIT_FOR_OPEN); 6456a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields if (IS_ERR(gss_auth->dentry)) { 6466a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields err = PTR_ERR(gss_auth->dentry); 6471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err_put_mech; 6486a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields } 6491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 650f5c2187cfef628784d8a09b6d0f77888246d0c0fTrond Myklebust err = rpcauth_init_credcache(auth); 65107a2bf1da4765d987ffd1d8045e92ba032e0ad78Trond Myklebust if (err) 65207a2bf1da4765d987ffd1d8045e92ba032e0ad78Trond Myklebust goto err_unlink_pipe; 65307a2bf1da4765d987ffd1d8045e92ba032e0ad78Trond Myklebust 6541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return auth; 65507a2bf1da4765d987ffd1d8045e92ba032e0ad78Trond Myklebusterr_unlink_pipe: 65607a2bf1da4765d987ffd1d8045e92ba032e0ad78Trond Myklebust rpc_unlink(gss_auth->dentry); 6571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserr_put_mech: 6581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_mech_put(gss_auth->mech); 6591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserr_free: 6601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(gss_auth); 6611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_dec: 6621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds module_put(THIS_MODULE); 6636a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields return ERR_PTR(err); 6641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 6670285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebustgss_free(struct gss_auth *gss_auth) 6680285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust{ 6690285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust rpc_unlink(gss_auth->dentry); 6700285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust gss_auth->dentry = NULL; 6710285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust gss_mech_put(gss_auth->mech); 6720285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust 6730285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust kfree(gss_auth); 6740285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust module_put(THIS_MODULE); 6750285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust} 6760285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust 6770285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebuststatic void 6780285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebustgss_free_callback(struct kref *kref) 6790285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust{ 6800285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust struct gss_auth *gss_auth = container_of(kref, struct gss_auth, kref); 6810285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust 6820285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust gss_free(gss_auth); 6830285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust} 6840285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust 6850285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebuststatic void 6861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_destroy(struct rpc_auth *auth) 6871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_auth *gss_auth; 6891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6908885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: destroying GSS authenticator %p flavor %d\n", 6918885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever auth, auth->au_flavor); 6921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6933ab9bb7243489f9db3abf3d05521ddfc6b184c0aTrond Myklebust rpcauth_destroy_credcache(auth); 6943ab9bb7243489f9db3abf3d05521ddfc6b184c0aTrond Myklebust 6951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_auth = container_of(auth, struct gss_auth, rpc_auth); 6960285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust kref_put(&gss_auth->kref, gss_free_callback); 6971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6990df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust/* 7000df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust * gss_destroying_context will cause the RPCSEC_GSS to send a NULL RPC call 7010df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust * to the server with the GSS control procedure field set to 7020df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust * RPC_GSS_PROC_DESTROY. This should normally cause the server to release 7030df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust * all RPCSEC_GSS state associated with that context. 7040df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust */ 7050df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebuststatic int 7060df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebustgss_destroying_context(struct rpc_cred *cred) 7070df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust{ 7080df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 7090df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); 7100df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust struct rpc_task *task; 7110df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust 7120df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust if (gss_cred->gc_ctx == NULL || 7130df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust gss_cred->gc_ctx->gc_proc == RPC_GSS_PROC_DESTROY) 7140df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust return 0; 7150df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust 7160df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust gss_cred->gc_ctx->gc_proc = RPC_GSS_PROC_DESTROY; 7170df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust cred->cr_ops = &gss_nullops; 7180df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust 7190df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust /* Take a reference to ensure the cred will be destroyed either 7200df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust * by the RPC call or by the put_rpccred() below */ 7210df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust get_rpccred(cred); 7220df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust 7230df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust task = rpc_call_null(gss_auth->client, cred, RPC_TASK_ASYNC); 7240df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust if (!IS_ERR(task)) 7250df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust rpc_put_task(task); 7260df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust 7270df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust put_rpccred(cred); 7280df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust return 1; 7290df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust} 7300df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust 7310df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust/* gss_destroy_cred (and gss_free_ctx) are used to clean up after failure 7321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * to create a new cred or context, so they check that things have been 7331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * allocated before freeing them. */ 7341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 7355d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebustgss_do_free_ctx(struct gss_cl_ctx *ctx) 7361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7375d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust dprintk("RPC: gss_free_ctx\n"); 7381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctx->gc_gss_ctx) 7401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_delete_sec_context(&ctx->gc_gss_ctx); 7411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(ctx->gc_wire_ctx.data); 7431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(ctx); 7441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 7475d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebustgss_free_ctx_callback(struct rcu_head *head) 7485d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust{ 7495d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust struct gss_cl_ctx *ctx = container_of(head, struct gss_cl_ctx, gc_rcu); 7505d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust gss_do_free_ctx(ctx); 7515d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust} 7525d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust 7535d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebuststatic void 7545d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebustgss_free_ctx(struct gss_cl_ctx *ctx) 7555d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust{ 7565d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust call_rcu(&ctx->gc_rcu, gss_free_ctx_callback); 7575d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust} 7585d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust 7595d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebuststatic void 76031be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebustgss_free_cred(struct gss_cred *gss_cred) 7611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 76231be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebust dprintk("RPC: gss_free_cred %p\n", gss_cred); 76331be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebust kfree(gss_cred); 76431be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebust} 7651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 76631be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebuststatic void 76731be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebustgss_free_cred_callback(struct rcu_head *head) 76831be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebust{ 76931be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebust struct gss_cred *gss_cred = container_of(head, struct gss_cred, gc_base.cr_rcu); 77031be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebust gss_free_cred(gss_cred); 77131be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebust} 7721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 77331be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebuststatic void 77431be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebustgss_destroy_cred(struct rpc_cred *cred) 77531be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebust{ 7765d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 7770285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); 7785d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust struct gss_cl_ctx *ctx = gss_cred->gc_ctx; 7795d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust 7800df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust if (gss_destroying_context(cred)) 7810df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust return; 7825d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust rcu_assign_pointer(gss_cred->gc_ctx, NULL); 78331be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebust call_rcu(&cred->cr_rcu, gss_free_cred_callback); 7845d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust if (ctx) 7855d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust gss_put_ctx(ctx); 7860285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust kref_put(&gss_auth->kref, gss_free_callback); 7871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 7901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Lookup RPCSEC_GSS cred for the current process 7911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 7921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct rpc_cred * 7938a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebustgss_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) 7941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7958a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebust return rpcauth_lookup_credcache(auth, acred, flags); 7961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct rpc_cred * 7998a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebustgss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) 8001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 8021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *cred = NULL; 8031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err = -ENOMEM; 8041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8058885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: gss_create_cred for uid %d, flavor %d\n", 8061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds acred->uid, auth->au_flavor); 8071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8080da974f4f303a6842516b764507e3c0a03f41e5aPanagiotis Issaris if (!(cred = kzalloc(sizeof(*cred), GFP_KERNEL))) 8091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_err; 8101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8115fe4755e2526a2aa82b7ed8daeb3aed74a236925Trond Myklebust rpcauth_init_cred(&cred->gc_base, acred, auth, &gss_credops); 8121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 8131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Note: in order to force a call to call_refresh(), we deliberately 8141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * fail to flag the credential as RPCAUTH_CRED_UPTODATE. 8151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 816fc432dd90760a629c57026e57f65ff80a1a31d2fTrond Myklebust cred->gc_base.cr_flags = 1UL << RPCAUTH_CRED_NEW; 8171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cred->gc_service = gss_auth->service; 8180285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust kref_get(&gss_auth->kref); 8191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return &cred->gc_base; 8201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_err: 8228885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: gss_create_cred failed with error %d\n", err); 8231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ERR_PTR(err); 8241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 827fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebustgss_cred_init(struct rpc_auth *auth, struct rpc_cred *cred) 828fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust{ 829fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 830fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust struct gss_cred *gss_cred = container_of(cred,struct gss_cred, gc_base); 831fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust int err; 832fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust 833fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust do { 834fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust err = gss_create_upcall(gss_auth, gss_cred); 835fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust } while (err == -EAGAIN); 836fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust return err; 837fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust} 838fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust 839fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebuststatic int 8408a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebustgss_match(struct auth_cred *acred, struct rpc_cred *rc, int flags) 8411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base); 8431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8448a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebust /* 8458a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebust * If the searchflags have set RPCAUTH_LOOKUP_NEW, then 8468a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebust * we don't really care if the credential has expired or not, 8478a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebust * since the caller should be prepared to reinitialise it. 8488a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebust */ 849fc432dd90760a629c57026e57f65ff80a1a31d2fTrond Myklebust if ((flags & RPCAUTH_LOOKUP_NEW) && test_bit(RPCAUTH_CRED_NEW, &rc->cr_flags)) 8508a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebust goto out; 8511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Don't match with creds that have expired. */ 8521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_cred->gc_ctx && time_after(jiffies, gss_cred->gc_ctx->gc_expiry)) 8531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 8548a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebustout: 8551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (rc->cr_uid == acred->uid); 8561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 8591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds* Marshal credentials. 8601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds* Maybe we should keep a cached credential for performance reasons. 8611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds*/ 862d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyanstatic __be32 * 863d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyangss_marshal(struct rpc_task *task, __be32 *p) 8641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_cred *cred = task->tk_msg.rpc_cred; 8661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 8671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gc_base); 8681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 869d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan __be32 *cred_len; 8701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_rqst *req = task->tk_rqstp; 8711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 maj_stat = 0; 8721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_netobj mic; 8731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct kvec iov; 8741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_buf verf_buf; 8751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8768885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: %5u gss_marshal\n", task->tk_pid); 8771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *p++ = htonl(RPC_AUTH_GSS); 8791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cred_len = p++; 8801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock(&ctx->gc_seq_lock); 8821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds req->rq_seqno = ctx->gc_seq++; 8831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock(&ctx->gc_seq_lock); 8841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *p++ = htonl((u32) RPC_GSS_VERSION); 8861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *p++ = htonl((u32) ctx->gc_proc); 8871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *p++ = htonl((u32) req->rq_seqno); 8881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *p++ = htonl((u32) gss_cred->gc_service); 8891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = xdr_encode_netobj(p, &ctx->gc_wire_ctx); 8901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *cred_len = htonl((p - (cred_len + 1)) << 2); 8911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We compute the checksum for the verifier over the xdr-encoded bytes 8931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * starting with the xid and ending at the end of the credential: */ 894808012fbb23a52ec59352445d2076d175ad4ab26Chuck Lever iov.iov_base = xprt_skip_transport_header(task->tk_xprt, 895808012fbb23a52ec59352445d2076d175ad4ab26Chuck Lever req->rq_snd_buf.head[0].iov_base); 8961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iov.iov_len = (u8 *)p - (u8 *)iov.iov_base; 8971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 8981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* set verifier flavor*/ 9001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *p++ = htonl(RPC_AUTH_GSS); 9011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mic.data = (u8 *)(p + 1); 90300fd6e14255fe7a249315746386d640bc4e9e758J. Bruce Fields maj_stat = gss_get_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 9041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) { 905fc432dd90760a629c57026e57f65ff80a1a31d2fTrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 9061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (maj_stat != 0) { 9071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("gss_marshal: gss_get_mic FAILED (%d)\n", maj_stat); 9081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_put_ctx; 9091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = xdr_encode_opaque(p, NULL, mic.len); 9111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 9121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return p; 9131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_put_ctx: 9141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 9151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 9161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 9191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds* Refresh credentials. XXX - finish 9201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds*/ 9211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 9221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_refresh(struct rpc_task *task) 9231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!gss_cred_is_uptodate_ctx(task->tk_msg.rpc_cred)) 9261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return gss_refresh_upcall(task); 9271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 9281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9300df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust/* Dummy refresh routine: used only when destroying the context */ 9310df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebuststatic int 9320df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebustgss_refresh_null(struct rpc_task *task) 9330df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust{ 9340df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust return -EACCES; 9350df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust} 9360df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust 937d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyanstatic __be32 * 938d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyangss_validate(struct rpc_task *task, __be32 *p) 9391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_cred *cred = task->tk_msg.rpc_cred; 9411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 942d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan __be32 seq; 9431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct kvec iov; 9441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_buf verf_buf; 9451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_netobj mic; 9461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 flav,len; 9471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 maj_stat; 9481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9498885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: %5u gss_validate\n", task->tk_pid); 9501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds flav = ntohl(*p++); 9521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((len = ntohl(*p++)) > RPC_MAX_AUTH_SIZE) 953cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793YOSHIFUJI Hideaki goto out_bad; 9541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (flav != RPC_AUTH_GSS) 9551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_bad; 9561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds seq = htonl(task->tk_rqstp->rq_seqno); 9571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iov.iov_base = &seq; 9581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iov.iov_len = sizeof(seq); 9591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 9601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mic.data = (u8 *)p; 9611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mic.len = len; 9621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 96300fd6e14255fe7a249315746386d640bc4e9e758J. Bruce Fields maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 9641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 965fc432dd90760a629c57026e57f65ff80a1a31d2fTrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 9660df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust if (maj_stat) { 9670df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust dprintk("RPC: %5u gss_validate: gss_verify_mic returned" 9680df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust "error 0x%08x\n", task->tk_pid, maj_stat); 9691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_bad; 9700df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust } 97124b2605becc10ca63c4c30808fa59a8abbf68727J. Bruce Fields /* We leave it to unwrap to calculate au_rslack. For now we just 97224b2605becc10ca63c4c30808fa59a8abbf68727J. Bruce Fields * calculate the length of the verifier: */ 9731be27f36601973815171db684c711d30557cf50cTrond Myklebust cred->cr_auth->au_verfsize = XDR_QUADLEN(len) + 2; 9741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 9758885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: %5u gss_validate: gss_verify_mic succeeded.\n", 9761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds task->tk_pid); 9771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return p + XDR_QUADLEN(len); 9781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_bad: 9791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 9808885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: %5u gss_validate failed.\n", task->tk_pid); 9811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 9821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int 9851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 986d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan kxdrproc_t encode, struct rpc_rqst *rqstp, __be32 *p, void *obj) 9871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 9891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_buf integ_buf; 990d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan __be32 *integ_len = NULL; 9911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_netobj mic; 992d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan u32 offset; 993d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan __be32 *q; 9941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct kvec *iov; 9951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 maj_stat = 0; 9961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = -EIO; 9971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds integ_len = p++; 9991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 10001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *p++ = htonl(rqstp->rq_seqno); 10011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = encode(rqstp, p, obj); 10031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status) 10041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 10051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (xdr_buf_subsegment(snd_buf, &integ_buf, 10071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds offset, snd_buf->len - offset)) 10081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 10091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *integ_len = htonl(integ_buf.len); 10101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* guess whether we're in the head or the tail: */ 1012cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793YOSHIFUJI Hideaki if (snd_buf->page_len || snd_buf->tail[0].iov_len) 10131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iov = snd_buf->tail; 10141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 10151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iov = snd_buf->head; 10161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = iov->iov_base + iov->iov_len; 10171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mic.data = (u8 *)(p + 1); 10181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 101900fd6e14255fe7a249315746386d640bc4e9e758J. Bruce Fields maj_stat = gss_get_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 10201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = -EIO; /* XXX? */ 10211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1022fc432dd90760a629c57026e57f65ff80a1a31d2fTrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 10231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (maj_stat) 10241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 10251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q = xdr_encode_opaque(p, NULL, mic.len); 10261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds offset = (u8 *)q - (u8 *)p; 10281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iov->iov_len += offset; 10291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds snd_buf->len += offset; 10301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 10311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10332d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsstatic void 10342d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldspriv_release_snd_buf(struct rpc_rqst *rqstp) 10352d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields{ 10362d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields int i; 10372d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 10382d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) 10392d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields __free_page(rqstp->rq_enc_pages[i]); 10402d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields kfree(rqstp->rq_enc_pages); 10412d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields} 10422d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 10432d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsstatic int 10442d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsalloc_enc_pages(struct rpc_rqst *rqstp) 10452d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields{ 10462d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 10472d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields int first, last, i; 10482d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 10492d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (snd_buf->page_len == 0) { 10502d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields rqstp->rq_enc_pages_num = 0; 10512d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return 0; 10522d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields } 10532d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 10542d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields first = snd_buf->page_base >> PAGE_CACHE_SHIFT; 10552d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields last = (snd_buf->page_base + snd_buf->page_len - 1) >> PAGE_CACHE_SHIFT; 10562d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields rqstp->rq_enc_pages_num = last - first + 1 + 1; 10572d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields rqstp->rq_enc_pages 10582d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields = kmalloc(rqstp->rq_enc_pages_num * sizeof(struct page *), 10592d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields GFP_NOFS); 10602d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (!rqstp->rq_enc_pages) 10612d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields goto out; 10622d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) { 10632d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields rqstp->rq_enc_pages[i] = alloc_page(GFP_NOFS); 10642d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (rqstp->rq_enc_pages[i] == NULL) 10652d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields goto out_free; 10662d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields } 10672d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields rqstp->rq_release_snd_buf = priv_release_snd_buf; 10682d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return 0; 10692d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsout_free: 10702d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields for (i--; i >= 0; i--) { 10712d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields __free_page(rqstp->rq_enc_pages[i]); 10722d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields } 10732d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsout: 10742d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return -EAGAIN; 10752d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields} 10762d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 10772d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsstatic inline int 10782d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsgss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1079d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan kxdrproc_t encode, struct rpc_rqst *rqstp, __be32 *p, void *obj) 10802d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields{ 10812d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 10822d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields u32 offset; 10832d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields u32 maj_stat; 10842d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields int status; 1085d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan __be32 *opaque_len; 10862d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields struct page **inpages; 10872d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields int first; 10882d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields int pad; 10892d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields struct kvec *iov; 10902d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields char *tmp; 10912d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 10922d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields opaque_len = p++; 10932d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 10942d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields *p++ = htonl(rqstp->rq_seqno); 10952d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 10962d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields status = encode(rqstp, p, obj); 10972d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (status) 10982d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return status; 10992d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 11002d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields status = alloc_enc_pages(rqstp); 11012d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (status) 11022d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return status; 11032d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields first = snd_buf->page_base >> PAGE_CACHE_SHIFT; 11042d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields inpages = snd_buf->pages + first; 11052d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields snd_buf->pages = rqstp->rq_enc_pages; 11062d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields snd_buf->page_base -= first << PAGE_CACHE_SHIFT; 11072d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields /* Give the tail its own page, in case we need extra space in the 11082d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields * head when wrapping: */ 11092d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) { 11102d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields tmp = page_address(rqstp->rq_enc_pages[rqstp->rq_enc_pages_num - 1]); 11112d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields memcpy(tmp, snd_buf->tail[0].iov_base, snd_buf->tail[0].iov_len); 11122d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields snd_buf->tail[0].iov_base = tmp; 11132d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields } 111400fd6e14255fe7a249315746386d640bc4e9e758J. Bruce Fields maj_stat = gss_wrap(ctx->gc_gss_ctx, offset, snd_buf, inpages); 11152d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields /* RPC_SLACK_SPACE should prevent this ever happening: */ 11162d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields BUG_ON(snd_buf->len > snd_buf->buflen); 1117cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793YOSHIFUJI Hideaki status = -EIO; 11182d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields /* We're assuming that when GSS_S_CONTEXT_EXPIRED, the encryption was 11192d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields * done anyway, so it's safe to put the request on the wire: */ 11202d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1121fc432dd90760a629c57026e57f65ff80a1a31d2fTrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 11222d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields else if (maj_stat) 11232d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return status; 11242d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 11252d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields *opaque_len = htonl(snd_buf->len - offset); 11262d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields /* guess whether we're in the head or the tail: */ 11272d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) 11282d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields iov = snd_buf->tail; 11292d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields else 11302d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields iov = snd_buf->head; 11312d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields p = iov->iov_base + iov->iov_len; 11322d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields pad = 3 - ((snd_buf->len - offset - 1) & 3); 11332d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields memset(p, 0, pad); 11342d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields iov->iov_len += pad; 11352d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields snd_buf->len += pad; 11362d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 11372d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return 0; 11382d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields} 11392d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 11401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 11411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_wrap_req(struct rpc_task *task, 1142d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan kxdrproc_t encode, void *rqstp, __be32 *p, void *obj) 11431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_cred *cred = task->tk_msg.rpc_cred; 11451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 11461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gc_base); 11471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 11481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = -EIO; 11491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11508885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: %5u gss_wrap_req\n", task->tk_pid); 11511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) { 11521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The spec seems a little ambiguous here, but I think that not 11531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * wrapping context destruction requests makes the most sense. 11541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 11551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = encode(rqstp, p, obj); 11561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 11571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (gss_cred->gc_service) { 11591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case RPC_GSS_SVC_NONE: 11601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = encode(rqstp, p, obj); 11611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 11621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case RPC_GSS_SVC_INTEGRITY: 11631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = gss_wrap_req_integ(cred, ctx, encode, 11641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rqstp, p, obj); 11651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1166cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793YOSHIFUJI Hideaki case RPC_GSS_SVC_PRIVACY: 11672d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields status = gss_wrap_req_priv(cred, ctx, encode, 11682d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields rqstp, p, obj); 11691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 11701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 11721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 11738885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: %5u gss_wrap_req returning %d\n", task->tk_pid, status); 11741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 11751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int 11781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_unwrap_resp_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1179d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan struct rpc_rqst *rqstp, __be32 **p) 11801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 11821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_buf integ_buf; 11831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_netobj mic; 11841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 data_offset, mic_offset; 11851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 integ_len; 11861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 maj_stat; 11871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = -EIO; 11881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds integ_len = ntohl(*(*p)++); 11901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (integ_len & 3) 11911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 11921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds data_offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 11931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mic_offset = integ_len + data_offset; 11941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mic_offset > rcv_buf->len) 11951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 11961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ntohl(*(*p)++) != rqstp->rq_seqno) 11971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 11981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (xdr_buf_subsegment(rcv_buf, &integ_buf, data_offset, 12001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mic_offset - data_offset)) 12011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 12021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (xdr_buf_read_netobj(rcv_buf, &mic, mic_offset)) 12041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 12051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 120600fd6e14255fe7a249315746386d640bc4e9e758J. Bruce Fields maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 12071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1208fc432dd90760a629c57026e57f65ff80a1a31d2fTrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 12091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (maj_stat != GSS_S_COMPLETE) 12101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 12111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 12121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12142d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsstatic inline int 12152d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsgss_unwrap_resp_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1216d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan struct rpc_rqst *rqstp, __be32 **p) 12172d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields{ 12182d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 12192d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields u32 offset; 12202d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields u32 opaque_len; 12212d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields u32 maj_stat; 12222d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields int status = -EIO; 12232d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 12242d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields opaque_len = ntohl(*(*p)++); 12252d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 12262d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (offset + opaque_len > rcv_buf->len) 12272d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return status; 12282d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields /* remove padding: */ 12292d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields rcv_buf->len = offset + opaque_len; 12302d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 123100fd6e14255fe7a249315746386d640bc4e9e758J. Bruce Fields maj_stat = gss_unwrap(ctx->gc_gss_ctx, offset, rcv_buf); 12322d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1233fc432dd90760a629c57026e57f65ff80a1a31d2fTrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 12342d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (maj_stat != GSS_S_COMPLETE) 12352d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return status; 12362d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (ntohl(*(*p)++) != rqstp->rq_seqno) 12372d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return status; 12382d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 12392d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return 0; 12402d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields} 12412d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 12422d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 12431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 12441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_unwrap_resp(struct rpc_task *task, 1245d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan kxdrproc_t decode, void *rqstp, __be32 *p, void *obj) 12461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_cred *cred = task->tk_msg.rpc_cred; 12481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 12491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gc_base); 12501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1251d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan __be32 *savedp = p; 12522d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields struct kvec *head = ((struct rpc_rqst *)rqstp)->rq_rcv_buf.head; 12532d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields int savedlen = head->iov_len; 12541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = -EIO; 12551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) 12571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_decode; 12581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (gss_cred->gc_service) { 12591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case RPC_GSS_SVC_NONE: 12601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 12611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case RPC_GSS_SVC_INTEGRITY: 12621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = gss_unwrap_resp_integ(cred, ctx, rqstp, &p); 12631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status) 12641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 12651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1266cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793YOSHIFUJI Hideaki case RPC_GSS_SVC_PRIVACY: 12672d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields status = gss_unwrap_resp_priv(cred, ctx, rqstp, &p); 12682d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (status) 12692d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields goto out; 12701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 12711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 127224b2605becc10ca63c4c30808fa59a8abbf68727J. Bruce Fields /* take into account extra slack for integrity and privacy cases: */ 12731be27f36601973815171db684c711d30557cf50cTrond Myklebust cred->cr_auth->au_rslack = cred->cr_auth->au_verfsize + (p - savedp) 12742d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields + (savedlen - head->iov_len); 12751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_decode: 12761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = decode(rqstp, p, obj); 12771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 12781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 12798885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: %5u gss_unwrap_resp returning %d\n", task->tk_pid, 12801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status); 12811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 12821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1283cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793YOSHIFUJI Hideaki 1284f1c0a8615090359d57e096157feb9f900cbb233cTrond Myklebuststatic const struct rpc_authops authgss_ops = { 12851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .owner = THIS_MODULE, 12861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .au_flavor = RPC_AUTH_GSS, 12871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef RPC_DEBUG 12881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .au_name = "RPCSEC_GSS", 12891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 12901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .create = gss_create, 12911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .destroy = gss_destroy, 12921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .lookup_cred = gss_lookup_cred, 12931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crcreate = gss_create_cred 12941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 12951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1296f1c0a8615090359d57e096157feb9f900cbb233cTrond Myklebuststatic const struct rpc_credops gss_credops = { 12971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .cr_name = "AUTH_GSS", 12981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crdestroy = gss_destroy_cred, 1299fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust .cr_init = gss_cred_init, 13001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crmatch = gss_match, 13011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crmarshal = gss_marshal, 13021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crrefresh = gss_refresh, 13031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crvalidate = gss_validate, 13041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crwrap_req = gss_wrap_req, 13051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crunwrap_resp = gss_unwrap_resp, 13061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 13071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13080df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebuststatic const struct rpc_credops gss_nullops = { 13090df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust .cr_name = "AUTH_GSS", 13100df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust .crdestroy = gss_destroy_cred, 13110df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust .crmatch = gss_match, 13120df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust .crmarshal = gss_marshal, 13130df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust .crrefresh = gss_refresh_null, 13140df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust .crvalidate = gss_validate, 13150df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust .crwrap_req = gss_wrap_req, 13160df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust .crunwrap_resp = gss_unwrap_resp, 13170df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust}; 13180df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust 13191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct rpc_pipe_ops gss_upcall_ops = { 13201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .upcall = gss_pipe_upcall, 13211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .downcall = gss_pipe_downcall, 13221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .destroy_msg = gss_pipe_destroy_msg, 13231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .release_pipe = gss_pipe_release, 13241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 13251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 13271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Initialize RPCSEC_GSS module 13281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 13291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int __init init_rpcsec_gss(void) 13301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err = 0; 13321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = rpcauth_register(&authgss_ops); 13341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) 13351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 13361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = gss_svc_init(); 13371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) 13381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_unregister; 13391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 13401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_unregister: 13411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rpcauth_unregister(&authgss_ops); 13421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 13431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 13441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void __exit exit_rpcsec_gss(void) 13471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_svc_shutdown(); 13491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rpcauth_unregister(&authgss_ops); 13501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_LICENSE("GPL"); 13531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_init(init_rpcsec_gss) 13541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_exit(exit_rpcsec_gss) 1355