auth_gss.c revision 2d2da60c63b67174add32f06e8d54c3a0c5cd9cf
11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * linux/net/sunrpc/auth_gss.c 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * RPCSEC_GSS client authentication. 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Copyright (c) 2000 The Regents of the University of Michigan. 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * All rights reserved. 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Dug Song <dugsong@monkey.org> 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Andy Adamson <andros@umich.edu> 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Redistribution and use in source and binary forms, with or without 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * modification, are permitted provided that the following conditions 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * are met: 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1. Redistributions of source code must retain the above copyright 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * notice, this list of conditions and the following disclaimer. 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2. Redistributions in binary form must reproduce the above copyright 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * notice, this list of conditions and the following disclaimer in the 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * documentation and/or other materials provided with the distribution. 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 3. Neither the name of the University nor the names of its 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * contributors may be used to endorse or promote products derived 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * from this software without specific prior written permission. 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * $Id$ 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/module.h> 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/init.h> 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/types.h> 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/slab.h> 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sched.h> 462d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields#include <linux/pagemap.h> 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sunrpc/clnt.h> 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sunrpc/auth.h> 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sunrpc/auth_gss.h> 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sunrpc/svcauth_gss.h> 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sunrpc/gss_err.h> 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/workqueue.h> 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sunrpc/rpc_pipe_fs.h> 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sunrpc/gss_api.h> 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/uaccess.h> 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct rpc_authops authgss_ops; 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct rpc_credops gss_credops; 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef RPC_DEBUG 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds# define RPCDBG_FACILITY RPCDBG_AUTH 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define NFS_NGROUPS 16 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define GSS_CRED_EXPIRE (60 * HZ) /* XXX: reasonable? */ 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define GSS_CRED_SLACK 1024 /* XXX: unused */ 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* length of a krb5 verifier (48), plus data added before arguments when 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * using integrity (two 4-byte integers): */ 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define GSS_VERF_SLACK 56 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 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define CA_RUN_AS_MACHINE 0x00000200 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* dump the buffer in `emacs-hexl' style */ 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define isprint(c) ((c > 0x1f) && (c < 0x7f)) 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic DEFINE_RWLOCK(gss_ctx_lock); 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct gss_auth { 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_auth rpc_auth; 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_api_mech *mech; 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds enum rpc_gss_svc service; 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct list_head upcalls; 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_clnt *client; 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dentry *dentry; 91f134585a7343d71f9be7f0cf97e2145f21dd10c6Trond Myklebust char path[48]; 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spinlock_t lock; 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void gss_destroy_ctx(struct gss_cl_ctx *); 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct rpc_pipe_ops gss_upcall_ops; 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsprint_hexl(u32 *p, u_int length, u_int offset) 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u_int i, j, jm; 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 c, *cp; 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: print_hexl: length %d\n",length); 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("\n"); 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cp = (u8 *) p; 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < length; i += 0x10) { 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk(" %04x: ", (u_int)(i + offset)); 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds jm = length - i; 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds jm = jm > 16 ? 16 : jm; 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (j = 0; j < jm; j++) { 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((j % 2) == 1) 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("%02x ", (u_int)cp[i+j]); 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("%02x", (u_int)cp[i+j]); 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (; j < 16; j++) { 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((j % 2) == 1) 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk(" "); 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk(" "); 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk(" "); 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (j = 0; j < jm; j++) { 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds c = cp[i+j]; 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds c = isprint(c) ? c : '.'; 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("%c", c); 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("\n"); 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(print_hexl); 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline struct gss_cl_ctx * 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_get_ctx(struct gss_cl_ctx *ctx) 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_inc(&ctx->count); 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ctx; 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline void 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_put_ctx(struct gss_cl_ctx *ctx) 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (atomic_dec_and_test(&ctx->count)) 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_destroy_ctx(ctx); 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_cred_set_ctx(struct rpc_cred *cred, struct gss_cl_ctx *ctx) 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *old; 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_lock(&gss_ctx_lock); 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds old = gss_cred->gc_ctx; 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_cred->gc_ctx = ctx; 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cred->cr_flags |= RPCAUTH_CRED_UPTODATE; 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_unlock(&gss_ctx_lock); 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (old) 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(old); 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_cred_is_uptodate_ctx(struct rpc_cred *cred) 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int res = 0; 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds read_lock(&gss_ctx_lock); 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((cred->cr_flags & RPCAUTH_CRED_UPTODATE) && gss_cred->gc_ctx) 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds res = 1; 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds read_unlock(&gss_ctx_lock); 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return res; 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const void * 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldssimple_get_bytes(const void *p, const void *end, void *res, size_t len) 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const void *q = (const void *)((const char *)p + len); 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely(q > end || q < p)) 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ERR_PTR(-EFAULT); 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(res, p, len); 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return q; 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline const void * 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldssimple_get_netobj(const void *p, const void *end, struct xdr_netobj *dest) 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const void *q; 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int len; 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = simple_get_bytes(p, end, &len, sizeof(len)); 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return p; 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q = (const void *)((const char *)p + len); 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely(q > end || q < p)) 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ERR_PTR(-EFAULT); 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dest->data = kmalloc(len, GFP_KERNEL); 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely(dest->data == NULL)) 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ERR_PTR(-ENOMEM); 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dest->len = len; 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(dest->data, p, len); 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return q; 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct gss_cl_ctx * 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_cred_get_ctx(struct rpc_cred *cred) 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx = NULL; 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds read_lock(&gss_ctx_lock); 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_cred->gc_ctx) 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctx = gss_get_ctx(gss_cred->gc_ctx); 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds read_unlock(&gss_ctx_lock); 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ctx; 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct gss_cl_ctx * 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_alloc_context(void) 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx; 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctx != NULL) { 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(ctx, 0, sizeof(*ctx)); 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctx->gc_proc = RPC_GSS_PROC_DATA; 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctx->gc_seq = 1; /* NetApp 6.4R1 doesn't accept seq. no. 0 */ 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_init(&ctx->gc_seq_lock); 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_set(&ctx->count,1); 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ctx; 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define GSSD_MIN_TIMEOUT (60 * 60) 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const void * 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_fill_context(const void *p, const void *end, struct gss_cl_ctx *ctx, struct gss_api_mech *gm) 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const void *q; 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int seclen; 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int timeout; 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 window_size; 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ret; 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* First unsigned int gives the lifetime (in seconds) of the cred */ 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = simple_get_bytes(p, end, &timeout, sizeof(timeout)); 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (timeout == 0) 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeout = GSSD_MIN_TIMEOUT; 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctx->gc_expiry = jiffies + (unsigned long)timeout * HZ * 3 / 4; 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Sequence number window. Determines the maximum number of simultaneous requests */ 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = simple_get_bytes(p, end, &window_size, sizeof(window_size)); 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctx->gc_win = window_size; 2601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* gssd signals an error by passing ctx->gc_win = 0: */ 2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctx->gc_win == 0) { 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* in which case, p points to an error code which we ignore */ 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = ERR_PTR(-EACCES); 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* copy the opaque wire context */ 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = simple_get_netobj(p, end, &ctx->gc_wire_ctx); 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* import the opaque security context */ 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = simple_get_bytes(p, end, &seclen, sizeof(seclen)); 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q = (const void *)((const char *)p + seclen); 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely(q > end || q < p)) { 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = ERR_PTR(-EFAULT); 2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = gss_import_sec_context(p, seclen, gm, &ctx->gc_gss_ctx); 2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ret < 0) { 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = ERR_PTR(ret); 2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 2831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return q; 2851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserr: 2861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: gss_fill_context returning %ld\n", -PTR_ERR(p)); 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return p; 2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct gss_upcall_msg { 2921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_t count; 2931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds uid_t uid; 2941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_pipe_msg msg; 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct list_head list; 2961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_auth *auth; 2971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_wait_queue rpc_waitqueue; 2981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wait_queue_head_t waitqueue; 2991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx; 3001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 3011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 3031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_release_msg(struct gss_upcall_msg *gss_msg) 3041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!atomic_dec_and_test(&gss_msg->count)) 3061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 3071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds BUG_ON(!list_empty(&gss_msg->list)); 3081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_msg->ctx != NULL) 3091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(gss_msg->ctx); 3101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(gss_msg); 3111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct gss_upcall_msg * 3141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds__gss_find_upcall(struct gss_auth *gss_auth, uid_t uid) 3151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *pos; 3171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(pos, &gss_auth->upcalls, list) { 3181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (pos->uid != uid) 3191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 3201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_inc(&pos->count); 3211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: gss_find_upcall found msg %p\n", pos); 3221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return pos; 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: gss_find_upcall found nothing\n"); 3251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 3261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Try to add a upcall to the pipefs queue. 3291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If an upcall owned by our uid already exists, then we return a reference 3301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * to that upcall instead of adding the new upcall. 3311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline struct gss_upcall_msg * 3331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_add_msg(struct gss_auth *gss_auth, struct gss_upcall_msg *gss_msg) 3341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *old; 3361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock(&gss_auth->lock); 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds old = __gss_find_upcall(gss_auth, gss_msg->uid); 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (old == NULL) { 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_inc(&gss_msg->count); 3411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_add(&gss_msg->list, &gss_auth->upcalls); 3421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else 3431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg = old; 3441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock(&gss_auth->lock); 3451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return gss_msg; 3461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 3491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds__gss_unhash_msg(struct gss_upcall_msg *gss_msg) 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (list_empty(&gss_msg->list)) 3521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 3531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_del_init(&gss_msg->list); 3541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 3551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up_all(&gss_msg->waitqueue); 3561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_dec(&gss_msg->count); 3571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 3601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_unhash_msg(struct gss_upcall_msg *gss_msg) 3611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_auth *gss_auth = gss_msg->auth; 3631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock(&gss_auth->lock); 3651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __gss_unhash_msg(gss_msg); 3661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock(&gss_auth->lock); 3671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 3701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_upcall_callback(struct rpc_task *task) 3711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(task->tk_msg.rpc_cred, 3731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred, gc_base); 3741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_msg = gss_cred->gc_upcall; 3751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds BUG_ON(gss_msg == NULL); 3771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_msg->ctx) 3781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_cred_set_ctx(task->tk_msg.rpc_cred, gss_get_ctx(gss_msg->ctx)); 3791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 3801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds task->tk_status = gss_msg->msg.errno; 3811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock(&gss_msg->auth->lock); 3821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_cred->gc_upcall = NULL; 3831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 3841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock(&gss_msg->auth->lock); 3851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_release_msg(gss_msg); 3861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline struct gss_upcall_msg * 3891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_alloc_msg(struct gss_auth *gss_auth, uid_t uid) 3901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_msg; 3921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg = kmalloc(sizeof(*gss_msg), GFP_KERNEL); 3941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_msg != NULL) { 3951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(gss_msg, 0, sizeof(*gss_msg)); 3961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD(&gss_msg->list); 3971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rpc_init_wait_queue(&gss_msg->rpc_waitqueue, "RPCSEC_GSS upcall waitq"); 3981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_waitqueue_head(&gss_msg->waitqueue); 3991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_set(&gss_msg->count, 1); 4001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg->msg.data = &gss_msg->uid; 4011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg->msg.len = sizeof(gss_msg->uid); 4021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg->uid = uid; 4031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg->auth = gss_auth; 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return gss_msg; 4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct gss_upcall_msg * 4091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_setup_upcall(struct rpc_clnt *clnt, struct gss_auth *gss_auth, struct rpc_cred *cred) 4101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_new, *gss_msg; 4121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_new = gss_alloc_msg(gss_auth, cred->cr_uid); 4141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_new == NULL) 4151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ERR_PTR(-ENOMEM); 4161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg = gss_add_msg(gss_auth, gss_new); 4171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_msg == gss_new) { 4181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int res = rpc_queue_upcall(gss_auth->dentry->d_inode, &gss_new->msg); 4191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (res) { 4201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_unhash_msg(gss_new); 4211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg = ERR_PTR(res); 4221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else 4241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_release_msg(gss_new); 4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return gss_msg; 4261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int 4291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_refresh_upcall(struct rpc_task *task) 4301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_cred *cred = task->tk_msg.rpc_cred; 4321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_auth *gss_auth = container_of(task->tk_client->cl_auth, 4331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_auth, rpc_auth); 4341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(cred, 4351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred, gc_base); 4361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_msg; 4371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err = 0; 4381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: %4u gss_refresh_upcall for uid %u\n", task->tk_pid, cred->cr_uid); 4401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg = gss_setup_upcall(task->tk_client, gss_auth, cred); 4411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(gss_msg)) { 4421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = PTR_ERR(gss_msg); 4431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 4441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock(&gss_auth->lock); 4461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_cred->gc_upcall != NULL) 4471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rpc_sleep_on(&gss_cred->gc_upcall->rpc_waitqueue, task, NULL, NULL); 4481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (gss_msg->ctx == NULL && gss_msg->msg.errno >= 0) { 4491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds task->tk_timeout = 0; 4501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_cred->gc_upcall = gss_msg; 4511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* gss_upcall_callback will release the reference to gss_upcall_msg */ 4521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_inc(&gss_msg->count); 4531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rpc_sleep_on(&gss_msg->rpc_waitqueue, task, gss_upcall_callback, NULL); 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else 4551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = gss_msg->msg.errno; 4561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock(&gss_auth->lock); 4571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_release_msg(gss_msg); 4581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: %4u gss_refresh_upcall for uid %u result %d\n", task->tk_pid, 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cred->cr_uid, err); 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int 4651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred) 4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_cred *cred = &gss_cred->gc_base; 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_msg; 4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DEFINE_WAIT(wait); 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err = 0; 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: gss_upcall for uid %u\n", cred->cr_uid); 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg = gss_setup_upcall(gss_auth->client, gss_auth, cred); 4741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(gss_msg)) { 4751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = PTR_ERR(gss_msg); 4761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 4771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (;;) { 4791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds prepare_to_wait(&gss_msg->waitqueue, &wait, TASK_INTERRUPTIBLE); 4801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock(&gss_auth->lock); 4811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_msg->ctx != NULL || gss_msg->msg.errno < 0) { 4821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock(&gss_auth->lock); 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock(&gss_auth->lock); 4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (signalled()) { 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = -ERESTARTSYS; 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_intr; 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds schedule(); 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_msg->ctx) 4931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_cred_set_ctx(cred, gss_get_ctx(gss_msg->ctx)); 4941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = gss_msg->msg.errno; 4961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_intr: 4971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds finish_wait(&gss_msg->waitqueue, &wait); 4981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_release_msg(gss_msg); 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 5001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: gss_create_upcall for uid %u result %d\n", cred->cr_uid, err); 5011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 5021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic ssize_t 5051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_pipe_upcall(struct file *filp, struct rpc_pipe_msg *msg, 5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char __user *dst, size_t buflen) 5071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char *data = (char *)msg->data + msg->copied; 5091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ssize_t mlen = msg->len; 5101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ssize_t left; 5111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mlen > buflen) 5131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mlen = buflen; 5141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds left = copy_to_user(dst, data, mlen); 5151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (left < 0) { 5161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds msg->errno = left; 5171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return left; 5181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mlen -= left; 5201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds msg->copied += mlen; 5211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds msg->errno = 0; 5221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return mlen; 5231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define MSG_BUF_MAXSIZE 1024 5261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic ssize_t 5281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen) 5291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const void *p, *end; 5311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds void *buf; 5321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_clnt *clnt; 5331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_auth *gss_auth; 5341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_cred *cred; 5351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_msg; 5361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx; 5371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds uid_t uid; 5381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err = -EFBIG; 5391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mlen > MSG_BUF_MAXSIZE) 5411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 5421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = -ENOMEM; 5431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf = kmalloc(mlen, GFP_KERNEL); 5441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!buf) 5451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 5461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clnt = RPC_I(filp->f_dentry->d_inode)->private; 5481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = -EFAULT; 5491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (copy_from_user(buf, src, mlen)) 5501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 5511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds end = (const void *)((char *)buf + mlen); 5531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = simple_get_bytes(buf, end, &uid, sizeof(uid)); 5541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) { 5551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = PTR_ERR(p); 5561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 5571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = -ENOMEM; 5601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctx = gss_alloc_context(); 5611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctx == NULL) 5621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 5631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = 0; 5641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_auth = container_of(clnt->cl_auth, struct gss_auth, rpc_auth); 5651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = gss_fill_context(p, end, ctx, gss_auth->mech); 5661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) { 5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = PTR_ERR(p); 5681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err != -EACCES) 5691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err_put_ctx; 5701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock(&gss_auth->lock); 5721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg = __gss_find_upcall(gss_auth, uid); 5731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_msg) { 5741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err == 0 && gss_msg->ctx == NULL) 5751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg->ctx = gss_get_ctx(ctx); 5761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg->msg.errno = err; 5771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __gss_unhash_msg(gss_msg); 5781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock(&gss_auth->lock); 5791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_release_msg(gss_msg); 5801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 5811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct auth_cred acred = { .uid = uid }; 5821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock(&gss_auth->lock); 5831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cred = rpcauth_lookup_credcache(clnt->cl_auth, &acred, 0); 5841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(cred)) { 5851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = PTR_ERR(cred); 5861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err_put_ctx; 5871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_cred_set_ctx(cred, gss_get_ctx(ctx)); 5891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 5911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(buf); 5921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: gss_pipe_downcall returning length %Zu\n", mlen); 5931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return mlen; 5941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserr_put_ctx: 5951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 5961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserr: 5971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(buf); 5981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 5991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: gss_pipe_downcall returning %d\n", err); 6001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 6041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_pipe_release(struct inode *inode) 6051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_inode *rpci = RPC_I(inode); 6071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_clnt *clnt; 6081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_auth *auth; 6091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_auth *gss_auth; 6101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clnt = rpci->private; 6121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds auth = clnt->cl_auth; 6131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_auth = container_of(auth, struct gss_auth, rpc_auth); 6141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock(&gss_auth->lock); 6151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (!list_empty(&gss_auth->upcalls)) { 6161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_msg; 6171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg = list_entry(gss_auth->upcalls.next, 6191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg, list); 6201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg->msg.errno = -EPIPE; 6211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_inc(&gss_msg->count); 6221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __gss_unhash_msg(gss_msg); 6231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock(&gss_auth->lock); 6241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_release_msg(gss_msg); 6251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock(&gss_auth->lock); 6261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock(&gss_auth->lock); 6281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 6311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_pipe_destroy_msg(struct rpc_pipe_msg *msg) 6321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_msg = container_of(msg, struct gss_upcall_msg, msg); 6341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds static unsigned long ratelimit; 6351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (msg->errno < 0) { 6371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: gss_pipe_destroy_msg releasing msg %p\n", 6381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg); 6391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_inc(&gss_msg->count); 6401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_unhash_msg(gss_msg); 6411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (msg->errno == -ETIMEDOUT || msg->errno == -EPIPE) { 6421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long now = jiffies; 6431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (time_after(now, ratelimit)) { 6441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_WARNING "RPC: AUTH_GSS upcall timed out.\n" 6451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "Please check user daemon is running!\n"); 6461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ratelimit = now + 15*HZ; 6471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_release_msg(gss_msg); 6501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 6541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOTE: we have the opportunity to use different 6551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * parameters based on the input flavor (which must be a pseudoflavor) 6561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 6571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct rpc_auth * 6581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor) 6591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_auth *gss_auth; 6611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_auth * auth; 6626a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields int err = -ENOMEM; /* XXX? */ 6631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: creating GSS authenticator for client %p\n",clnt); 6651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!try_module_get(THIS_MODULE)) 6676a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields return ERR_PTR(err); 6681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL))) 6691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_dec; 6701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_auth->client = clnt; 6716a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields err = -EINVAL; 6721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_auth->mech = gss_mech_get_by_pseudoflavor(flavor); 6731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!gss_auth->mech) { 6741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_WARNING "%s: Pseudoflavor %d not found!", 6751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FUNCTION__, flavor); 6761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err_free; 6771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_auth->service = gss_pseudoflavor_to_service(gss_auth->mech, flavor); 679438b6fdebf2a2e8573e7290bc176feb4d4475f43J. Bruce Fields if (gss_auth->service == 0) 680438b6fdebf2a2e8573e7290bc176feb4d4475f43J. Bruce Fields goto err_put_mech; 6811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD(&gss_auth->upcalls); 6821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_init(&gss_auth->lock); 6831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds auth = &gss_auth->rpc_auth; 6841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds auth->au_cslack = GSS_CRED_SLACK >> 2; 6851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds auth->au_rslack = GSS_VERF_SLACK >> 2; 6861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds auth->au_ops = &authgss_ops; 6871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds auth->au_flavor = flavor; 6881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_set(&auth->au_count, 1); 6891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6906a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields err = rpcauth_init_credcache(auth, GSS_CRED_EXPIRE); 6916a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields if (err) 6921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err_put_mech; 6931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 694f134585a7343d71f9be7f0cf97e2145f21dd10c6Trond Myklebust snprintf(gss_auth->path, sizeof(gss_auth->path), "%s/%s", 695f134585a7343d71f9be7f0cf97e2145f21dd10c6Trond Myklebust clnt->cl_pathname, 696f134585a7343d71f9be7f0cf97e2145f21dd10c6Trond Myklebust gss_auth->mech->gm_name); 697f134585a7343d71f9be7f0cf97e2145f21dd10c6Trond Myklebust gss_auth->dentry = rpc_mkpipe(gss_auth->path, clnt, &gss_upcall_ops, RPC_PIPE_WAIT_FOR_OPEN); 6986a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields if (IS_ERR(gss_auth->dentry)) { 6996a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields err = PTR_ERR(gss_auth->dentry); 7001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err_put_mech; 7016a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields } 7021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return auth; 7041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserr_put_mech: 7051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_mech_put(gss_auth->mech); 7061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserr_free: 7071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(gss_auth); 7081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_dec: 7091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds module_put(THIS_MODULE); 7106a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields return ERR_PTR(err); 7111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 7141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_destroy(struct rpc_auth *auth) 7151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_auth *gss_auth; 7171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: destroying GSS authenticator %p flavor %d\n", 7191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds auth, auth->au_flavor); 7201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_auth = container_of(auth, struct gss_auth, rpc_auth); 722f134585a7343d71f9be7f0cf97e2145f21dd10c6Trond Myklebust rpc_unlink(gss_auth->path); 7231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_mech_put(gss_auth->mech); 7241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rpcauth_free_credcache(auth); 7261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(gss_auth); 7271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds module_put(THIS_MODULE); 7281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* gss_destroy_cred (and gss_destroy_ctx) are used to clean up after failure 7311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * to create a new cred or context, so they check that things have been 7321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * allocated before freeing them. */ 7331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 7341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_destroy_ctx(struct gss_cl_ctx *ctx) 7351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: gss_destroy_ctx\n"); 7371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctx->gc_gss_ctx) 7391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_delete_sec_context(&ctx->gc_gss_ctx); 7401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(ctx->gc_wire_ctx.data); 7421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(ctx); 7431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 7461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_destroy_cred(struct rpc_cred *rc) 7471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *cred = container_of(rc, struct gss_cred, gc_base); 7491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: gss_destroy_cred \n"); 7511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cred->gc_ctx) 7531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(cred->gc_ctx); 7541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(cred); 7551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 7581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Lookup RPCSEC_GSS cred for the current process 7591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 7601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct rpc_cred * 7611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int taskflags) 7621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rpcauth_lookup_credcache(auth, acred, taskflags); 7641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct rpc_cred * 7671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int taskflags) 7681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 7701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *cred = NULL; 7711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err = -ENOMEM; 7721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: gss_create_cred for uid %d, flavor %d\n", 7741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds acred->uid, auth->au_flavor); 7751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(cred = kmalloc(sizeof(*cred), GFP_KERNEL))) 7771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_err; 7781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(cred, 0, sizeof(*cred)); 7801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_set(&cred->gc_count, 1); 7811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cred->gc_uid = acred->uid; 7821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 7831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Note: in order to force a call to call_refresh(), we deliberately 7841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * fail to flag the credential as RPCAUTH_CRED_UPTODATE. 7851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 7861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cred->gc_flags = 0; 7871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cred->gc_base.cr_ops = &gss_credops; 7881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cred->gc_service = gss_auth->service; 7891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = gss_create_upcall(gss_auth, cred); 7901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err < 0) 7911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_err; 7921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return &cred->gc_base; 7941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_err: 7961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: gss_create_cred failed with error %d\n", err); 7971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cred) gss_destroy_cred(&cred->gc_base); 7981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ERR_PTR(err); 7991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 8021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_match(struct auth_cred *acred, struct rpc_cred *rc, int taskflags) 8031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base); 8051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Don't match with creds that have expired. */ 8071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_cred->gc_ctx && time_after(jiffies, gss_cred->gc_ctx->gc_expiry)) 8081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 8091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (rc->cr_uid == acred->uid); 8101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 8131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds* Marshal credentials. 8141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds* Maybe we should keep a cached credential for performance reasons. 8151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds*/ 8161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic u32 * 8171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_marshal(struct rpc_task *task, u32 *p) 8181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_cred *cred = task->tk_msg.rpc_cred; 8201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 8211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gc_base); 8221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 8231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 *cred_len; 8241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_rqst *req = task->tk_rqstp; 8251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 maj_stat = 0; 8261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_netobj mic; 8271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct kvec iov; 8281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_buf verf_buf; 8291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: %4u gss_marshal\n", task->tk_pid); 8311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *p++ = htonl(RPC_AUTH_GSS); 8331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cred_len = p++; 8341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock(&ctx->gc_seq_lock); 8361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds req->rq_seqno = ctx->gc_seq++; 8371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock(&ctx->gc_seq_lock); 8381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *p++ = htonl((u32) RPC_GSS_VERSION); 8401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *p++ = htonl((u32) ctx->gc_proc); 8411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *p++ = htonl((u32) req->rq_seqno); 8421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *p++ = htonl((u32) gss_cred->gc_service); 8431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = xdr_encode_netobj(p, &ctx->gc_wire_ctx); 8441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *cred_len = htonl((p - (cred_len + 1)) << 2); 8451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We compute the checksum for the verifier over the xdr-encoded bytes 8471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * starting with the xid and ending at the end of the credential: */ 848808012fbb23a52ec59352445d2076d175ad4ab26Chuck Lever iov.iov_base = xprt_skip_transport_header(task->tk_xprt, 849808012fbb23a52ec59352445d2076d175ad4ab26Chuck Lever req->rq_snd_buf.head[0].iov_base); 8501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iov.iov_len = (u8 *)p - (u8 *)iov.iov_base; 8511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 8521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* set verifier flavor*/ 8541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *p++ = htonl(RPC_AUTH_GSS); 8551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mic.data = (u8 *)(p + 1); 8571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds maj_stat = gss_get_mic(ctx->gc_gss_ctx, 8581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds GSS_C_QOP_DEFAULT, 8591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &verf_buf, &mic); 8601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) { 8611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE; 8621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (maj_stat != 0) { 8631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("gss_marshal: gss_get_mic FAILED (%d)\n", maj_stat); 8641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_put_ctx; 8651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = xdr_encode_opaque(p, NULL, mic.len); 8671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 8681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return p; 8691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_put_ctx: 8701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 8711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 8721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 8751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds* Refresh credentials. XXX - finish 8761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds*/ 8771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 8781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_refresh(struct rpc_task *task) 8791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!gss_cred_is_uptodate_ctx(task->tk_msg.rpc_cred)) 8821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return gss_refresh_upcall(task); 8831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 8841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic u32 * 8871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_validate(struct rpc_task *task, u32 *p) 8881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_cred *cred = task->tk_msg.rpc_cred; 8901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 8911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 seq, qop_state; 8921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct kvec iov; 8931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_buf verf_buf; 8941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_netobj mic; 8951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 flav,len; 8961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 maj_stat; 8971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: %4u gss_validate\n", task->tk_pid); 8991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds flav = ntohl(*p++); 9011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((len = ntohl(*p++)) > RPC_MAX_AUTH_SIZE) 9021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_bad; 9031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (flav != RPC_AUTH_GSS) 9041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_bad; 9051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds seq = htonl(task->tk_rqstp->rq_seqno); 9061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iov.iov_base = &seq; 9071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iov.iov_len = sizeof(seq); 9081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 9091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mic.data = (u8 *)p; 9101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mic.len = len; 9111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &verf_buf, &mic, &qop_state); 9131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 9141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE; 9151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (maj_stat) 9161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_bad; 91724b2605becc10ca63c4c30808fa59a8abbf68727J. Bruce Fields /* We leave it to unwrap to calculate au_rslack. For now we just 91824b2605becc10ca63c4c30808fa59a8abbf68727J. Bruce Fields * calculate the length of the verifier: */ 91924b2605becc10ca63c4c30808fa59a8abbf68727J. Bruce Fields task->tk_auth->au_verfsize = XDR_QUADLEN(len) + 2; 9201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 9211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: %4u GSS gss_validate: gss_verify_mic succeeded.\n", 9221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds task->tk_pid); 9231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return p + XDR_QUADLEN(len); 9241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_bad: 9251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 9261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: %4u gss_validate failed.\n", task->tk_pid); 9271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 9281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int 9311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 9321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kxdrproc_t encode, struct rpc_rqst *rqstp, u32 *p, void *obj) 9331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 9351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_buf integ_buf; 9361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 *integ_len = NULL; 9371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_netobj mic; 9381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 offset, *q; 9391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct kvec *iov; 9401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 maj_stat = 0; 9411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = -EIO; 9421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds integ_len = p++; 9441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 9451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *p++ = htonl(rqstp->rq_seqno); 9461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = encode(rqstp, p, obj); 9481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status) 9491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 9501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (xdr_buf_subsegment(snd_buf, &integ_buf, 9521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds offset, snd_buf->len - offset)) 9531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 9541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *integ_len = htonl(integ_buf.len); 9551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* guess whether we're in the head or the tail: */ 9571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (snd_buf->page_len || snd_buf->tail[0].iov_len) 9581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iov = snd_buf->tail; 9591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 9601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iov = snd_buf->head; 9611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = iov->iov_base + iov->iov_len; 9621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mic.data = (u8 *)(p + 1); 9631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds maj_stat = gss_get_mic(ctx->gc_gss_ctx, 9651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds GSS_C_QOP_DEFAULT, &integ_buf, &mic); 9661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = -EIO; /* XXX? */ 9671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 9681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE; 9691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (maj_stat) 9701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 9711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q = xdr_encode_opaque(p, NULL, mic.len); 9721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds offset = (u8 *)q - (u8 *)p; 9741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iov->iov_len += offset; 9751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds snd_buf->len += offset; 9761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 9771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9792d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsstatic void 9802d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldspriv_release_snd_buf(struct rpc_rqst *rqstp) 9812d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields{ 9822d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields int i; 9832d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 9842d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) 9852d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields __free_page(rqstp->rq_enc_pages[i]); 9862d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields kfree(rqstp->rq_enc_pages); 9872d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields} 9882d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 9892d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsstatic int 9902d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsalloc_enc_pages(struct rpc_rqst *rqstp) 9912d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields{ 9922d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 9932d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields int first, last, i; 9942d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 9952d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (snd_buf->page_len == 0) { 9962d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields rqstp->rq_enc_pages_num = 0; 9972d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return 0; 9982d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields } 9992d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 10002d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields first = snd_buf->page_base >> PAGE_CACHE_SHIFT; 10012d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields last = (snd_buf->page_base + snd_buf->page_len - 1) >> PAGE_CACHE_SHIFT; 10022d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields rqstp->rq_enc_pages_num = last - first + 1 + 1; 10032d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields rqstp->rq_enc_pages 10042d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields = kmalloc(rqstp->rq_enc_pages_num * sizeof(struct page *), 10052d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields GFP_NOFS); 10062d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (!rqstp->rq_enc_pages) 10072d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields goto out; 10082d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) { 10092d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields rqstp->rq_enc_pages[i] = alloc_page(GFP_NOFS); 10102d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (rqstp->rq_enc_pages[i] == NULL) 10112d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields goto out_free; 10122d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields } 10132d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields rqstp->rq_release_snd_buf = priv_release_snd_buf; 10142d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return 0; 10152d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsout_free: 10162d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields for (i--; i >= 0; i--) { 10172d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields __free_page(rqstp->rq_enc_pages[i]); 10182d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields } 10192d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsout: 10202d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return -EAGAIN; 10212d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields} 10222d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 10232d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsstatic inline int 10242d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsgss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 10252d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields kxdrproc_t encode, struct rpc_rqst *rqstp, u32 *p, void *obj) 10262d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields{ 10272d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 10282d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields u32 offset; 10292d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields u32 maj_stat; 10302d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields int status; 10312d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields u32 *opaque_len; 10322d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields struct page **inpages; 10332d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields int first; 10342d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields int pad; 10352d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields struct kvec *iov; 10362d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields char *tmp; 10372d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 10382d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields opaque_len = p++; 10392d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 10402d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields *p++ = htonl(rqstp->rq_seqno); 10412d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 10422d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields status = encode(rqstp, p, obj); 10432d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (status) 10442d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return status; 10452d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 10462d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields status = alloc_enc_pages(rqstp); 10472d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (status) 10482d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return status; 10492d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields first = snd_buf->page_base >> PAGE_CACHE_SHIFT; 10502d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields inpages = snd_buf->pages + first; 10512d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields snd_buf->pages = rqstp->rq_enc_pages; 10522d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields snd_buf->page_base -= first << PAGE_CACHE_SHIFT; 10532d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields /* Give the tail its own page, in case we need extra space in the 10542d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields * head when wrapping: */ 10552d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) { 10562d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields tmp = page_address(rqstp->rq_enc_pages[rqstp->rq_enc_pages_num - 1]); 10572d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields memcpy(tmp, snd_buf->tail[0].iov_base, snd_buf->tail[0].iov_len); 10582d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields snd_buf->tail[0].iov_base = tmp; 10592d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields } 10602d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields maj_stat = gss_wrap(ctx->gc_gss_ctx, GSS_C_QOP_DEFAULT, offset, 10612d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields snd_buf, inpages); 10622d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields /* RPC_SLACK_SPACE should prevent this ever happening: */ 10632d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields BUG_ON(snd_buf->len > snd_buf->buflen); 10642d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields status = -EIO; 10652d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields /* We're assuming that when GSS_S_CONTEXT_EXPIRED, the encryption was 10662d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields * done anyway, so it's safe to put the request on the wire: */ 10672d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 10682d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE; 10692d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields else if (maj_stat) 10702d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return status; 10712d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 10722d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields *opaque_len = htonl(snd_buf->len - offset); 10732d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields /* guess whether we're in the head or the tail: */ 10742d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) 10752d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields iov = snd_buf->tail; 10762d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields else 10772d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields iov = snd_buf->head; 10782d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields p = iov->iov_base + iov->iov_len; 10792d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields pad = 3 - ((snd_buf->len - offset - 1) & 3); 10802d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields memset(p, 0, pad); 10812d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields iov->iov_len += pad; 10822d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields snd_buf->len += pad; 10832d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 10842d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return 0; 10852d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields} 10862d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 10871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 10881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_wrap_req(struct rpc_task *task, 10891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kxdrproc_t encode, void *rqstp, u32 *p, void *obj) 10901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_cred *cred = task->tk_msg.rpc_cred; 10921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 10931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gc_base); 10941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 10951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = -EIO; 10961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: %4u gss_wrap_req\n", task->tk_pid); 10981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) { 10991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The spec seems a little ambiguous here, but I think that not 11001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * wrapping context destruction requests makes the most sense. 11011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 11021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = encode(rqstp, p, obj); 11031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 11041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (gss_cred->gc_service) { 11061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case RPC_GSS_SVC_NONE: 11071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = encode(rqstp, p, obj); 11081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 11091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case RPC_GSS_SVC_INTEGRITY: 11101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = gss_wrap_req_integ(cred, ctx, encode, 11111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rqstp, p, obj); 11121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 11131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case RPC_GSS_SVC_PRIVACY: 11142d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields status = gss_wrap_req_priv(cred, ctx, encode, 11152d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields rqstp, p, obj); 11161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 11171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 11191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 11201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: %4u gss_wrap_req returning %d\n", task->tk_pid, status); 11211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 11221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int 11251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_unwrap_resp_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 11261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_rqst *rqstp, u32 **p) 11271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 11291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_buf integ_buf; 11301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_netobj mic; 11311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 data_offset, mic_offset; 11321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 integ_len; 11331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 maj_stat; 11341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = -EIO; 11351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds integ_len = ntohl(*(*p)++); 11371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (integ_len & 3) 11381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 11391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds data_offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 11401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mic_offset = integ_len + data_offset; 11411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mic_offset > rcv_buf->len) 11421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 11431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ntohl(*(*p)++) != rqstp->rq_seqno) 11441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 11451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (xdr_buf_subsegment(rcv_buf, &integ_buf, data_offset, 11471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mic_offset - data_offset)) 11481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 11491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (xdr_buf_read_netobj(rcv_buf, &mic, mic_offset)) 11511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 11521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &integ_buf, 11541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &mic, NULL); 11551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 11561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE; 11571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (maj_stat != GSS_S_COMPLETE) 11581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 11591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 11601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11622d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsstatic inline int 11632d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsgss_unwrap_resp_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 11642d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields struct rpc_rqst *rqstp, u32 **p) 11652d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields{ 11662d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 11672d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields u32 offset; 11682d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields u32 opaque_len; 11692d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields u32 maj_stat; 11702d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields int status = -EIO; 11712d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 11722d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields opaque_len = ntohl(*(*p)++); 11732d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 11742d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (offset + opaque_len > rcv_buf->len) 11752d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return status; 11762d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields /* remove padding: */ 11772d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields rcv_buf->len = offset + opaque_len; 11782d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 11792d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields maj_stat = gss_unwrap(ctx->gc_gss_ctx, NULL, 11802d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields offset, rcv_buf); 11812d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 11822d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE; 11832d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (maj_stat != GSS_S_COMPLETE) 11842d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return status; 11852d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (ntohl(*(*p)++) != rqstp->rq_seqno) 11862d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return status; 11872d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 11882d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return 0; 11892d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields} 11902d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 11912d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 11921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 11931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_unwrap_resp(struct rpc_task *task, 11941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kxdrproc_t decode, void *rqstp, u32 *p, void *obj) 11951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_cred *cred = task->tk_msg.rpc_cred; 11971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 11981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gc_base); 11991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 120024b2605becc10ca63c4c30808fa59a8abbf68727J. Bruce Fields u32 *savedp = p; 12012d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields struct kvec *head = ((struct rpc_rqst *)rqstp)->rq_rcv_buf.head; 12022d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields int savedlen = head->iov_len; 12031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = -EIO; 12041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) 12061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_decode; 12071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (gss_cred->gc_service) { 12081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case RPC_GSS_SVC_NONE: 12091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 12101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case RPC_GSS_SVC_INTEGRITY: 12111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = gss_unwrap_resp_integ(cred, ctx, rqstp, &p); 12121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status) 12131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 12141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 12151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case RPC_GSS_SVC_PRIVACY: 12162d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields status = gss_unwrap_resp_priv(cred, ctx, rqstp, &p); 12172d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (status) 12182d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields goto out; 12191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 12201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 122124b2605becc10ca63c4c30808fa59a8abbf68727J. Bruce Fields /* take into account extra slack for integrity and privacy cases: */ 12222d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields task->tk_auth->au_rslack = task->tk_auth->au_verfsize + (p - savedp) 12232d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields + (savedlen - head->iov_len); 12241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_decode: 12251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = decode(rqstp, p, obj); 12261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 12271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 12281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dprintk("RPC: %4u gss_unwrap_resp returning %d\n", task->tk_pid, 12291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status); 12301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 12311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct rpc_authops authgss_ops = { 12341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .owner = THIS_MODULE, 12351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .au_flavor = RPC_AUTH_GSS, 12361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef RPC_DEBUG 12371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .au_name = "RPCSEC_GSS", 12381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 12391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .create = gss_create, 12401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .destroy = gss_destroy, 12411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .lookup_cred = gss_lookup_cred, 12421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crcreate = gss_create_cred 12431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 12441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct rpc_credops gss_credops = { 12461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .cr_name = "AUTH_GSS", 12471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crdestroy = gss_destroy_cred, 12481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crmatch = gss_match, 12491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crmarshal = gss_marshal, 12501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crrefresh = gss_refresh, 12511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crvalidate = gss_validate, 12521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crwrap_req = gss_wrap_req, 12531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crunwrap_resp = gss_unwrap_resp, 12541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 12551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct rpc_pipe_ops gss_upcall_ops = { 12571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .upcall = gss_pipe_upcall, 12581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .downcall = gss_pipe_downcall, 12591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .destroy_msg = gss_pipe_destroy_msg, 12601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .release_pipe = gss_pipe_release, 12611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 12621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 12641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Initialize RPCSEC_GSS module 12651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 12661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int __init init_rpcsec_gss(void) 12671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err = 0; 12691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = rpcauth_register(&authgss_ops); 12711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) 12721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 12731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = gss_svc_init(); 12741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) 12751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_unregister; 12761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 12771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_unregister: 12781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rpcauth_unregister(&authgss_ops); 12791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 12801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 12811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void __exit exit_rpcsec_gss(void) 12841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_svc_shutdown(); 12861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rpcauth_unregister(&authgss_ops); 12871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_LICENSE("GPL"); 12901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_init(init_rpcsec_gss) 12911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_exit(exit_rpcsec_gss) 1292