auth_gss.c revision b03568c32226163cb3588ea8993adb268ed497a5
11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2f30c2269544bffc7bf1b0d7c0abe5be1be83b8cbUwe Zeisberger * linux/net/sunrpc/auth_gss/auth_gss.c 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * RPCSEC_GSS client authentication. 5cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793YOSHIFUJI Hideaki * 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Copyright (c) 2000 The Regents of the University of Michigan. 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * All rights reserved. 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Dug Song <dugsong@monkey.org> 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Andy Adamson <andros@umich.edu> 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Redistribution and use in source and binary forms, with or without 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * modification, are permitted provided that the following conditions 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * are met: 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1. Redistributions of source code must retain the above copyright 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * notice, this list of conditions and the following disclaimer. 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2. Redistributions in binary form must reproduce the above copyright 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * notice, this list of conditions and the following disclaimer in the 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * documentation and/or other materials provided with the distribution. 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 3. Neither the name of the University nor the names of its 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * contributors may be used to endorse or promote products derived 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * from this software without specific prior written permission. 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/module.h> 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/init.h> 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/types.h> 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/slab.h> 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sched.h> 442d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields#include <linux/pagemap.h> 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sunrpc/clnt.h> 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sunrpc/auth.h> 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sunrpc/auth_gss.h> 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sunrpc/svcauth_gss.h> 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sunrpc/gss_err.h> 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/workqueue.h> 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sunrpc/rpc_pipe_fs.h> 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sunrpc/gss_api.h> 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/uaccess.h> 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 55f1c0a8615090359d57e096157feb9f900cbb233cTrond Myklebuststatic const struct rpc_authops authgss_ops; 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 57f1c0a8615090359d57e096157feb9f900cbb233cTrond Myklebuststatic const struct rpc_credops gss_credops; 580df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebuststatic const struct rpc_credops gss_nullops; 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef RPC_DEBUG 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds# define RPCDBG_FACILITY RPCDBG_AUTH 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 64d25a03cf966f2cf9990dc0bf2a921a554919ea34\\\"J. Bruce Fields\\\#define GSS_CRED_SLACK 1024 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* length of a krb5 verifier (48), plus data added before arguments when 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * using integrity (two 4-byte integers): */ 67adeb8133dd57f380e70a389a89a2ea3ae227f9e2Olga Kornievskaia#define GSS_VERF_SLACK 100 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct gss_auth { 700285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust struct kref kref; 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_auth rpc_auth; 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_api_mech *mech; 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds enum rpc_gss_svc service; 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_clnt *client; 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct dentry *dentry; 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 785d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebuststatic void gss_free_ctx(struct gss_cl_ctx *); 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct rpc_pipe_ops gss_upcall_ops; 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline struct gss_cl_ctx * 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_get_ctx(struct gss_cl_ctx *ctx) 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_inc(&ctx->count); 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ctx; 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline void 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_put_ctx(struct gss_cl_ctx *ctx) 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (atomic_dec_and_test(&ctx->count)) 925d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust gss_free_ctx(ctx); 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 955d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust/* gss_cred_set_ctx: 965d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust * called by gss_upcall_callback and gss_create_upcall in order 975d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust * to set the gss context. The actual exchange of an old context 985d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust * and a new one is protected by the inode->i_lock. 995d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust */ 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_cred_set_ctx(struct rpc_cred *cred, struct gss_cl_ctx *ctx) 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1045d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust 105cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) 106cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust return; 1077b6962b0a6000df48c8a5fd967d262f77704101bTrond Myklebust gss_get_ctx(ctx); 1085d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust rcu_assign_pointer(gss_cred->gc_ctx, ctx); 109fc432dd90760a629c57026e57f65ff80a1a31d2fTrond Myklebust set_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 110cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust smp_mb__before_clear_bit(); 111fc432dd90760a629c57026e57f65ff80a1a31d2fTrond Myklebust clear_bit(RPCAUTH_CRED_NEW, &cred->cr_flags); 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const void * 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldssimple_get_bytes(const void *p, const void *end, void *res, size_t len) 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const void *q = (const void *)((const char *)p + len); 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely(q > end || q < p)) 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ERR_PTR(-EFAULT); 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(res, p, len); 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return q; 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline const void * 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldssimple_get_netobj(const void *p, const void *end, struct xdr_netobj *dest) 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const void *q; 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int len; 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = simple_get_bytes(p, end, &len, sizeof(len)); 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return p; 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q = (const void *)((const char *)p + len); 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely(q > end || q < p)) 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ERR_PTR(-EFAULT); 1360f38b873aeaae698c3693748438547c8493165fbTrond Myklebust dest->data = kmemdup(p, len, GFP_NOFS); 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely(dest->data == NULL)) 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ERR_PTR(-ENOMEM); 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dest->len = len; 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return q; 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct gss_cl_ctx * 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_cred_get_ctx(struct rpc_cred *cred) 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx = NULL; 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1495d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust rcu_read_lock(); 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_cred->gc_ctx) 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctx = gss_get_ctx(gss_cred->gc_ctx); 1525d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust rcu_read_unlock(); 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ctx; 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct gss_cl_ctx * 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_alloc_context(void) 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx; 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1610f38b873aeaae698c3693748438547c8493165fbTrond Myklebust ctx = kzalloc(sizeof(*ctx), GFP_NOFS); 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctx != NULL) { 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctx->gc_proc = RPC_GSS_PROC_DATA; 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctx->gc_seq = 1; /* NetApp 6.4R1 doesn't accept seq. no. 0 */ 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_init(&ctx->gc_seq_lock); 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_set(&ctx->count,1); 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ctx; 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define GSSD_MIN_TIMEOUT (60 * 60) 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const void * 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_fill_context(const void *p, const void *end, struct gss_cl_ctx *ctx, struct gss_api_mech *gm) 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const void *q; 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int seclen; 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int timeout; 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 window_size; 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ret; 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* First unsigned int gives the lifetime (in seconds) of the cred */ 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = simple_get_bytes(p, end, &timeout, sizeof(timeout)); 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (timeout == 0) 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeout = GSSD_MIN_TIMEOUT; 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctx->gc_expiry = jiffies + (unsigned long)timeout * HZ * 3 / 4; 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Sequence number window. Determines the maximum number of simultaneous requests */ 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = simple_get_bytes(p, end, &window_size, sizeof(window_size)); 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctx->gc_win = window_size; 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* gssd signals an error by passing ctx->gc_win = 0: */ 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctx->gc_win == 0) { 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* in which case, p points to an error code which we ignore */ 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = ERR_PTR(-EACCES); 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* copy the opaque wire context */ 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = simple_get_netobj(p, end, &ctx->gc_wire_ctx); 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* import the opaque security context */ 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = simple_get_bytes(p, end, &seclen, sizeof(seclen)); 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q = (const void *)((const char *)p + seclen); 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely(q > end || q < p)) { 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = ERR_PTR(-EFAULT); 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = gss_import_sec_context(p, seclen, gm, &ctx->gc_gss_ctx); 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ret < 0) { 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = ERR_PTR(ret); 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return q; 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserr: 2198885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: gss_fill_context returning %ld\n", -PTR_ERR(p)); 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return p; 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct gss_upcall_msg { 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_t count; 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds uid_t uid; 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_pipe_msg msg; 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct list_head list; 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_auth *auth; 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_wait_queue rpc_waitqueue; 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wait_queue_head_t waitqueue; 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx; 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_release_msg(struct gss_upcall_msg *gss_msg) 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!atomic_dec_and_test(&gss_msg->count)) 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds BUG_ON(!list_empty(&gss_msg->list)); 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_msg->ctx != NULL) 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(gss_msg->ctx); 243f6a1cc89309f0ae847a9b6fe418d1c4215e5bc55Trond Myklebust rpc_destroy_wait_queue(&gss_msg->rpc_waitqueue); 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(gss_msg); 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct gss_upcall_msg * 2486e84c7b66a0aa0be16a7728d1e687c57978dac2cTrond Myklebust__gss_find_upcall(struct rpc_inode *rpci, uid_t uid) 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *pos; 2516e84c7b66a0aa0be16a7728d1e687c57978dac2cTrond Myklebust list_for_each_entry(pos, &rpci->in_downcall, list) { 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (pos->uid != uid) 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_inc(&pos->count); 2558885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: gss_find_upcall found msg %p\n", pos); 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return pos; 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2588885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: gss_find_upcall found nothing\n"); 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 2601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 262720b8f2d6f7de9e16f1217448cc7396e1604e175\\\"J. Bruce Fields\\\/* Try to add an upcall to the pipefs queue. 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If an upcall owned by our uid already exists, then we return a reference 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * to that upcall instead of adding the new upcall. 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline struct gss_upcall_msg * 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_add_msg(struct gss_auth *gss_auth, struct gss_upcall_msg *gss_msg) 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 269b185f835e243e654047ae85f42346827d3894171Trond Myklebust struct inode *inode = gss_auth->dentry->d_inode; 2706e84c7b66a0aa0be16a7728d1e687c57978dac2cTrond Myklebust struct rpc_inode *rpci = RPC_I(inode); 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *old; 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 273b185f835e243e654047ae85f42346827d3894171Trond Myklebust spin_lock(&inode->i_lock); 2746e84c7b66a0aa0be16a7728d1e687c57978dac2cTrond Myklebust old = __gss_find_upcall(rpci, gss_msg->uid); 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (old == NULL) { 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_inc(&gss_msg->count); 2776e84c7b66a0aa0be16a7728d1e687c57978dac2cTrond Myklebust list_add(&gss_msg->list, &rpci->in_downcall); 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg = old; 280b185f835e243e654047ae85f42346827d3894171Trond Myklebust spin_unlock(&inode->i_lock); 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return gss_msg; 2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 2851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds__gss_unhash_msg(struct gss_upcall_msg *gss_msg) 2861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_del_init(&gss_msg->list); 2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up_all(&gss_msg->waitqueue); 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_dec(&gss_msg->count); 2911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 2941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_unhash_msg(struct gss_upcall_msg *gss_msg) 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_auth *gss_auth = gss_msg->auth; 297b185f835e243e654047ae85f42346827d3894171Trond Myklebust struct inode *inode = gss_auth->dentry->d_inode; 2981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2993b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust if (list_empty(&gss_msg->list)) 3003b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust return; 301b185f835e243e654047ae85f42346827d3894171Trond Myklebust spin_lock(&inode->i_lock); 3023b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust if (!list_empty(&gss_msg->list)) 3033b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust __gss_unhash_msg(gss_msg); 304b185f835e243e654047ae85f42346827d3894171Trond Myklebust spin_unlock(&inode->i_lock); 3051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 3081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_upcall_callback(struct rpc_task *task) 3091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(task->tk_msg.rpc_cred, 3111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred, gc_base); 3121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_msg = gss_cred->gc_upcall; 313b185f835e243e654047ae85f42346827d3894171Trond Myklebust struct inode *inode = gss_msg->auth->dentry->d_inode; 3141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3155d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust spin_lock(&inode->i_lock); 3161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_msg->ctx) 3177b6962b0a6000df48c8a5fd967d262f77704101bTrond Myklebust gss_cred_set_ctx(task->tk_msg.rpc_cred, gss_msg->ctx); 3181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 3191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds task->tk_status = gss_msg->msg.errno; 3201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_cred->gc_upcall = NULL; 3211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 322b185f835e243e654047ae85f42346827d3894171Trond Myklebust spin_unlock(&inode->i_lock); 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_release_msg(gss_msg); 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline struct gss_upcall_msg * 3271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_alloc_msg(struct gss_auth *gss_auth, uid_t uid) 3281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_msg; 3301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3310f38b873aeaae698c3693748438547c8493165fbTrond Myklebust gss_msg = kzalloc(sizeof(*gss_msg), GFP_NOFS); 3321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_msg != NULL) { 3331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD(&gss_msg->list); 3341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rpc_init_wait_queue(&gss_msg->rpc_waitqueue, "RPCSEC_GSS upcall waitq"); 3351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_waitqueue_head(&gss_msg->waitqueue); 3361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_set(&gss_msg->count, 1); 3371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg->msg.data = &gss_msg->uid; 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg->msg.len = sizeof(gss_msg->uid); 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg->uid = uid; 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg->auth = gss_auth; 3411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return gss_msg; 3431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct gss_upcall_msg * 3461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_setup_upcall(struct rpc_clnt *clnt, struct gss_auth *gss_auth, struct rpc_cred *cred) 3471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3487c67db3a8a98045744f06fcd6d8f476d9df0ba5cTrond Myklebust struct gss_cred *gss_cred = container_of(cred, 3497c67db3a8a98045744f06fcd6d8f476d9df0ba5cTrond Myklebust struct gss_cred, gc_base); 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_new, *gss_msg; 3517c67db3a8a98045744f06fcd6d8f476d9df0ba5cTrond Myklebust uid_t uid = cred->cr_uid; 3521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3537c67db3a8a98045744f06fcd6d8f476d9df0ba5cTrond Myklebust /* Special case: rpc.gssd assumes that uid == 0 implies machine creds */ 3547c67db3a8a98045744f06fcd6d8f476d9df0ba5cTrond Myklebust if (gss_cred->gc_machine_cred != 0) 3557c67db3a8a98045744f06fcd6d8f476d9df0ba5cTrond Myklebust uid = 0; 3567c67db3a8a98045744f06fcd6d8f476d9df0ba5cTrond Myklebust 3577c67db3a8a98045744f06fcd6d8f476d9df0ba5cTrond Myklebust gss_new = gss_alloc_msg(gss_auth, uid); 3581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_new == NULL) 3591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ERR_PTR(-ENOMEM); 3601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg = gss_add_msg(gss_auth, gss_new); 3611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_msg == gss_new) { 3621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int res = rpc_queue_upcall(gss_auth->dentry->d_inode, &gss_new->msg); 3631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (res) { 3641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_unhash_msg(gss_new); 3651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg = ERR_PTR(res); 3661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else 3681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_release_msg(gss_new); 3691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return gss_msg; 3701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 372b03568c32226163cb3588ea8993adb268ed497a5\"J. Bruce Fields\static void warn_gssd(void) 373b03568c32226163cb3588ea8993adb268ed497a5\"J. Bruce Fields\{ 374b03568c32226163cb3588ea8993adb268ed497a5\"J. Bruce Fields\ static unsigned long ratelimit; 375b03568c32226163cb3588ea8993adb268ed497a5\"J. Bruce Fields\ unsigned long now = jiffies; 376b03568c32226163cb3588ea8993adb268ed497a5\"J. Bruce Fields\ 377b03568c32226163cb3588ea8993adb268ed497a5\"J. Bruce Fields\ if (time_after(now, ratelimit)) { 378b03568c32226163cb3588ea8993adb268ed497a5\"J. Bruce Fields\ printk(KERN_WARNING "RPC: AUTH_GSS upcall timed out.\n" 379b03568c32226163cb3588ea8993adb268ed497a5\"J. Bruce Fields\ "Please check user daemon is running.\n"); 380b03568c32226163cb3588ea8993adb268ed497a5\"J. Bruce Fields\ ratelimit = now + 15*HZ; 381b03568c32226163cb3588ea8993adb268ed497a5\"J. Bruce Fields\ } 382b03568c32226163cb3588ea8993adb268ed497a5\"J. Bruce Fields\} 383b03568c32226163cb3588ea8993adb268ed497a5\"J. Bruce Fields\ 3841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int 3851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_refresh_upcall(struct rpc_task *task) 3861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_cred *cred = task->tk_msg.rpc_cred; 3884a8c1344dccb848dbcf0edabc8b5c51a8ecf2808Trond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, 3891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_auth, rpc_auth); 3901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(cred, 3911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred, gc_base); 3921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_msg; 393b185f835e243e654047ae85f42346827d3894171Trond Myklebust struct inode *inode = gss_auth->dentry->d_inode; 3941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err = 0; 3951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3968885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: %5u gss_refresh_upcall for uid %u\n", task->tk_pid, 3978885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever cred->cr_uid); 3981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg = gss_setup_upcall(task->tk_client, gss_auth, cred); 3991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(gss_msg)) { 4001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = PTR_ERR(gss_msg); 4011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 4021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 403b185f835e243e654047ae85f42346827d3894171Trond Myklebust spin_lock(&inode->i_lock); 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_cred->gc_upcall != NULL) 4055d00837b90340af9106dcd93af75fd664c8eb87fTrond Myklebust rpc_sleep_on(&gss_cred->gc_upcall->rpc_waitqueue, task, NULL); 4067b6962b0a6000df48c8a5fd967d262f77704101bTrond Myklebust else if (gss_msg->ctx != NULL) { 4077b6962b0a6000df48c8a5fd967d262f77704101bTrond Myklebust gss_cred_set_ctx(task->tk_msg.rpc_cred, gss_msg->ctx); 4087b6962b0a6000df48c8a5fd967d262f77704101bTrond Myklebust gss_cred->gc_upcall = NULL; 4097b6962b0a6000df48c8a5fd967d262f77704101bTrond Myklebust rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 4107b6962b0a6000df48c8a5fd967d262f77704101bTrond Myklebust } else if (gss_msg->msg.errno >= 0) { 4111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds task->tk_timeout = 0; 4121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_cred->gc_upcall = gss_msg; 4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* gss_upcall_callback will release the reference to gss_upcall_msg */ 4141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_inc(&gss_msg->count); 4155d00837b90340af9106dcd93af75fd664c8eb87fTrond Myklebust rpc_sleep_on(&gss_msg->rpc_waitqueue, task, gss_upcall_callback); 4161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else 4171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = gss_msg->msg.errno; 418b185f835e243e654047ae85f42346827d3894171Trond Myklebust spin_unlock(&inode->i_lock); 4191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_release_msg(gss_msg); 4201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 4218885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: %5u gss_refresh_upcall for uid %u result %d\n", 4228885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever task->tk_pid, cred->cr_uid, err); 4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 4241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int 4271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred) 4281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 429b185f835e243e654047ae85f42346827d3894171Trond Myklebust struct inode *inode = gss_auth->dentry->d_inode; 4301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_cred *cred = &gss_cred->gc_base; 4311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_msg; 4321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DEFINE_WAIT(wait); 4331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err = 0; 4341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4358885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: gss_upcall for uid %u\n", cred->cr_uid); 4361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg = gss_setup_upcall(gss_auth->client, gss_auth, cred); 4371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(gss_msg)) { 4381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = PTR_ERR(gss_msg); 4391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 4401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (;;) { 4421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds prepare_to_wait(&gss_msg->waitqueue, &wait, TASK_INTERRUPTIBLE); 443b185f835e243e654047ae85f42346827d3894171Trond Myklebust spin_lock(&inode->i_lock); 4441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_msg->ctx != NULL || gss_msg->msg.errno < 0) { 4451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 447b185f835e243e654047ae85f42346827d3894171Trond Myklebust spin_unlock(&inode->i_lock); 4481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (signalled()) { 4491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = -ERESTARTSYS; 4501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_intr; 4511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds schedule(); 4531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_msg->ctx) 4557b6962b0a6000df48c8a5fd967d262f77704101bTrond Myklebust gss_cred_set_ctx(cred, gss_msg->ctx); 4561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = gss_msg->msg.errno; 4585d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust spin_unlock(&inode->i_lock); 4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_intr: 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds finish_wait(&gss_msg->waitqueue, &wait); 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_release_msg(gss_msg); 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 4638885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: gss_create_upcall for uid %u result %d\n", 4648885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever cred->cr_uid, err); 4651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic ssize_t 4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_pipe_upcall(struct file *filp, struct rpc_pipe_msg *msg, 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char __user *dst, size_t buflen) 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char *data = (char *)msg->data + msg->copied; 4737df089952fca41cb336733e1167c0a25e5a025d8Chuck Lever size_t mlen = min(msg->len, buflen); 4747df089952fca41cb336733e1167c0a25e5a025d8Chuck Lever unsigned long left; 4751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds left = copy_to_user(dst, data, mlen); 4777df089952fca41cb336733e1167c0a25e5a025d8Chuck Lever if (left == mlen) { 4787df089952fca41cb336733e1167c0a25e5a025d8Chuck Lever msg->errno = -EFAULT; 4797df089952fca41cb336733e1167c0a25e5a025d8Chuck Lever return -EFAULT; 4801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4817df089952fca41cb336733e1167c0a25e5a025d8Chuck Lever 4821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mlen -= left; 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds msg->copied += mlen; 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds msg->errno = 0; 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return mlen; 4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define MSG_BUF_MAXSIZE 1024 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic ssize_t 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen) 4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const void *p, *end; 4941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds void *buf; 4951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_msg; 496b185f835e243e654047ae85f42346827d3894171Trond Myklebust struct inode *inode = filp->f_path.dentry->d_inode; 4971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx; 4981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds uid_t uid; 4993b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust ssize_t err = -EFBIG; 5001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mlen > MSG_BUF_MAXSIZE) 5021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 5031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = -ENOMEM; 5040f38b873aeaae698c3693748438547c8493165fbTrond Myklebust buf = kmalloc(mlen, GFP_NOFS); 5051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!buf) 5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 5071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = -EFAULT; 5091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (copy_from_user(buf, src, mlen)) 5101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 5111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds end = (const void *)((char *)buf + mlen); 5131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = simple_get_bytes(buf, end, &uid, sizeof(uid)); 5141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) { 5151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = PTR_ERR(p); 5161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 5171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = -ENOMEM; 5201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctx = gss_alloc_context(); 5211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctx == NULL) 5221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 5233b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust 5243b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust err = -ENOENT; 5253b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust /* Find a matching upcall */ 5263b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust spin_lock(&inode->i_lock); 5276e84c7b66a0aa0be16a7728d1e687c57978dac2cTrond Myklebust gss_msg = __gss_find_upcall(RPC_I(inode), uid); 5283b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust if (gss_msg == NULL) { 5293b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust spin_unlock(&inode->i_lock); 5303b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust goto err_put_ctx; 5313b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust } 5323b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust list_del_init(&gss_msg->list); 5333b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust spin_unlock(&inode->i_lock); 5343b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust 5356e84c7b66a0aa0be16a7728d1e687c57978dac2cTrond Myklebust p = gss_fill_context(p, end, ctx, gss_msg->auth->mech); 5361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) { 5371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = PTR_ERR(p); 538ffc40f569272b6be60c66441aeae79a686ff54d9Kevin Coffman gss_msg->msg.errno = (err == -EAGAIN) ? -EAGAIN : -EACCES; 5393b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust goto err_release_msg; 5401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5413b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust gss_msg->ctx = gss_get_ctx(ctx); 5423b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust err = mlen; 5433b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust 5443b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebusterr_release_msg: 545b185f835e243e654047ae85f42346827d3894171Trond Myklebust spin_lock(&inode->i_lock); 5463b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust __gss_unhash_msg(gss_msg); 5473b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust spin_unlock(&inode->i_lock); 5483b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust gss_release_msg(gss_msg); 5491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserr_put_ctx: 5501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 5511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserr: 5521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(buf); 5531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 5543b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust dprintk("RPC: gss_pipe_downcall returning %Zd\n", err); 5551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 5561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 5591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_pipe_release(struct inode *inode) 5601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_inode *rpci = RPC_I(inode); 5626e84c7b66a0aa0be16a7728d1e687c57978dac2cTrond Myklebust struct gss_upcall_msg *gss_msg; 5631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 564b185f835e243e654047ae85f42346827d3894171Trond Myklebust spin_lock(&inode->i_lock); 5656e84c7b66a0aa0be16a7728d1e687c57978dac2cTrond Myklebust while (!list_empty(&rpci->in_downcall)) { 5661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5676e84c7b66a0aa0be16a7728d1e687c57978dac2cTrond Myklebust gss_msg = list_entry(rpci->in_downcall.next, 5681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg, list); 5691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg->msg.errno = -EPIPE; 5701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_inc(&gss_msg->count); 5711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __gss_unhash_msg(gss_msg); 572b185f835e243e654047ae85f42346827d3894171Trond Myklebust spin_unlock(&inode->i_lock); 5731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_release_msg(gss_msg); 574b185f835e243e654047ae85f42346827d3894171Trond Myklebust spin_lock(&inode->i_lock); 5751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 576b185f835e243e654047ae85f42346827d3894171Trond Myklebust spin_unlock(&inode->i_lock); 5771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 5801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_pipe_destroy_msg(struct rpc_pipe_msg *msg) 5811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_msg = container_of(msg, struct gss_upcall_msg, msg); 5831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (msg->errno < 0) { 5858885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: gss_pipe_destroy_msg releasing msg %p\n", 5861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg); 5871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_inc(&gss_msg->count); 5881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_unhash_msg(gss_msg); 589b03568c32226163cb3588ea8993adb268ed497a5\"J. Bruce Fields\ if (msg->errno == -ETIMEDOUT) 590b03568c32226163cb3588ea8993adb268ed497a5\"J. Bruce Fields\ warn_gssd(); 5911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_release_msg(gss_msg); 5921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 595cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793YOSHIFUJI Hideaki/* 596cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793YOSHIFUJI Hideaki * NOTE: we have the opportunity to use different 5971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * parameters based on the input flavor (which must be a pseudoflavor) 5981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 5991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct rpc_auth * 6001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor) 6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_auth *gss_auth; 6031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_auth * auth; 6046a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields int err = -ENOMEM; /* XXX? */ 6051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6068885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: creating GSS authenticator for client %p\n", clnt); 6071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!try_module_get(THIS_MODULE)) 6096a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields return ERR_PTR(err); 6101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL))) 6111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_dec; 6121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_auth->client = clnt; 6136a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields err = -EINVAL; 6141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_auth->mech = gss_mech_get_by_pseudoflavor(flavor); 6151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!gss_auth->mech) { 6163392c34922130d1dca9ad436c358330daa85e94eJames Morris printk(KERN_WARNING "%s: Pseudoflavor %d not found!\n", 6170dc47877a3de00ceadea0005189656ae8dc52669Harvey Harrison __func__, flavor); 6181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err_free; 6191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_auth->service = gss_pseudoflavor_to_service(gss_auth->mech, flavor); 621438b6fdebf2a2e8573e7290bc176feb4d4475f43J. Bruce Fields if (gss_auth->service == 0) 622438b6fdebf2a2e8573e7290bc176feb4d4475f43J. Bruce Fields goto err_put_mech; 6231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds auth = &gss_auth->rpc_auth; 6241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds auth->au_cslack = GSS_CRED_SLACK >> 2; 6251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds auth->au_rslack = GSS_VERF_SLACK >> 2; 6261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds auth->au_ops = &authgss_ops; 6271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds auth->au_flavor = flavor; 6281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_set(&auth->au_count, 1); 6290285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust kref_init(&gss_auth->kref); 6301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 631158998b6fe36f6acef087f574c96d44713499cc9Trond Myklebust gss_auth->dentry = rpc_mkpipe(clnt->cl_dentry, gss_auth->mech->gm_name, 632158998b6fe36f6acef087f574c96d44713499cc9Trond Myklebust clnt, &gss_upcall_ops, RPC_PIPE_WAIT_FOR_OPEN); 6336a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields if (IS_ERR(gss_auth->dentry)) { 6346a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields err = PTR_ERR(gss_auth->dentry); 6351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err_put_mech; 6366a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields } 6371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 638f5c2187cfef628784d8a09b6d0f77888246d0c0fTrond Myklebust err = rpcauth_init_credcache(auth); 63907a2bf1da4765d987ffd1d8045e92ba032e0ad78Trond Myklebust if (err) 64007a2bf1da4765d987ffd1d8045e92ba032e0ad78Trond Myklebust goto err_unlink_pipe; 64107a2bf1da4765d987ffd1d8045e92ba032e0ad78Trond Myklebust 6421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return auth; 64307a2bf1da4765d987ffd1d8045e92ba032e0ad78Trond Myklebusterr_unlink_pipe: 64407a2bf1da4765d987ffd1d8045e92ba032e0ad78Trond Myklebust rpc_unlink(gss_auth->dentry); 6451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserr_put_mech: 6461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_mech_put(gss_auth->mech); 6471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserr_free: 6481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(gss_auth); 6491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_dec: 6501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds module_put(THIS_MODULE); 6516a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields return ERR_PTR(err); 6521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 6550285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebustgss_free(struct gss_auth *gss_auth) 6560285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust{ 6570285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust rpc_unlink(gss_auth->dentry); 6580285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust gss_mech_put(gss_auth->mech); 6590285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust 6600285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust kfree(gss_auth); 6610285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust module_put(THIS_MODULE); 6620285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust} 6630285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust 6640285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebuststatic void 6650285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebustgss_free_callback(struct kref *kref) 6660285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust{ 6670285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust struct gss_auth *gss_auth = container_of(kref, struct gss_auth, kref); 6680285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust 6690285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust gss_free(gss_auth); 6700285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust} 6710285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust 6720285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebuststatic void 6731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_destroy(struct rpc_auth *auth) 6741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_auth *gss_auth; 6761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6778885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: destroying GSS authenticator %p flavor %d\n", 6788885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever auth, auth->au_flavor); 6791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6803ab9bb7243489f9db3abf3d05521ddfc6b184c0aTrond Myklebust rpcauth_destroy_credcache(auth); 6813ab9bb7243489f9db3abf3d05521ddfc6b184c0aTrond Myklebust 6821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_auth = container_of(auth, struct gss_auth, rpc_auth); 6830285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust kref_put(&gss_auth->kref, gss_free_callback); 6841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6860df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust/* 6870df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust * gss_destroying_context will cause the RPCSEC_GSS to send a NULL RPC call 6880df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust * to the server with the GSS control procedure field set to 6890df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust * RPC_GSS_PROC_DESTROY. This should normally cause the server to release 6900df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust * all RPCSEC_GSS state associated with that context. 6910df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust */ 6920df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebuststatic int 6930df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebustgss_destroying_context(struct rpc_cred *cred) 6940df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust{ 6950df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 6960df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); 6970df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust struct rpc_task *task; 6980df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust 6990df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust if (gss_cred->gc_ctx == NULL || 7006dcd3926b214a1fb081df18305921dedae269977Jeff Layton test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) == 0) 7010df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust return 0; 7020df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust 7030df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust gss_cred->gc_ctx->gc_proc = RPC_GSS_PROC_DESTROY; 7040df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust cred->cr_ops = &gss_nullops; 7050df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust 7060df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust /* Take a reference to ensure the cred will be destroyed either 7070df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust * by the RPC call or by the put_rpccred() below */ 7080df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust get_rpccred(cred); 7090df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust 710080a1f148df0615f7a610e4776dd8f3fb706f54fTrond Myklebust task = rpc_call_null(gss_auth->client, cred, RPC_TASK_ASYNC|RPC_TASK_SOFT); 7110df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust if (!IS_ERR(task)) 7120df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust rpc_put_task(task); 7130df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust 7140df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust put_rpccred(cred); 7150df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust return 1; 7160df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust} 7170df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust 7180df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust/* gss_destroy_cred (and gss_free_ctx) are used to clean up after failure 7191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * to create a new cred or context, so they check that things have been 7201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * allocated before freeing them. */ 7211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 7225d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebustgss_do_free_ctx(struct gss_cl_ctx *ctx) 7231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7245d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust dprintk("RPC: gss_free_ctx\n"); 7251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(ctx->gc_wire_ctx.data); 7271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(ctx); 7281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 7315d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebustgss_free_ctx_callback(struct rcu_head *head) 7325d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust{ 7335d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust struct gss_cl_ctx *ctx = container_of(head, struct gss_cl_ctx, gc_rcu); 7345d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust gss_do_free_ctx(ctx); 7355d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust} 7365d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust 7375d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebuststatic void 7385d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebustgss_free_ctx(struct gss_cl_ctx *ctx) 7395d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust{ 740a4deb81ba8ece75af5560d40d9bb8d242c48a111Trond Myklebust struct gss_ctx *gc_gss_ctx; 741a4deb81ba8ece75af5560d40d9bb8d242c48a111Trond Myklebust 742a4deb81ba8ece75af5560d40d9bb8d242c48a111Trond Myklebust gc_gss_ctx = rcu_dereference(ctx->gc_gss_ctx); 743a4deb81ba8ece75af5560d40d9bb8d242c48a111Trond Myklebust rcu_assign_pointer(ctx->gc_gss_ctx, NULL); 7445d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust call_rcu(&ctx->gc_rcu, gss_free_ctx_callback); 745a4deb81ba8ece75af5560d40d9bb8d242c48a111Trond Myklebust if (gc_gss_ctx) 746a4deb81ba8ece75af5560d40d9bb8d242c48a111Trond Myklebust gss_delete_sec_context(&gc_gss_ctx); 7475d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust} 7485d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust 7495d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebuststatic void 75031be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebustgss_free_cred(struct gss_cred *gss_cred) 7511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 75231be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebust dprintk("RPC: gss_free_cred %p\n", gss_cred); 75331be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebust kfree(gss_cred); 75431be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebust} 7551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 75631be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebuststatic void 75731be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebustgss_free_cred_callback(struct rcu_head *head) 75831be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebust{ 75931be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebust struct gss_cred *gss_cred = container_of(head, struct gss_cred, gc_base.cr_rcu); 76031be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebust gss_free_cred(gss_cred); 76131be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebust} 7621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 76331be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebuststatic void 7646dcd3926b214a1fb081df18305921dedae269977Jeff Laytongss_destroy_nullcred(struct rpc_cred *cred) 76531be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebust{ 7665d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 7670285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); 7685d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust struct gss_cl_ctx *ctx = gss_cred->gc_ctx; 7695d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust 7705d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust rcu_assign_pointer(gss_cred->gc_ctx, NULL); 77131be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebust call_rcu(&cred->cr_rcu, gss_free_cred_callback); 7725d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust if (ctx) 7735d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust gss_put_ctx(ctx); 7740285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust kref_put(&gss_auth->kref, gss_free_callback); 7751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7776dcd3926b214a1fb081df18305921dedae269977Jeff Laytonstatic void 7786dcd3926b214a1fb081df18305921dedae269977Jeff Laytongss_destroy_cred(struct rpc_cred *cred) 7796dcd3926b214a1fb081df18305921dedae269977Jeff Layton{ 7806dcd3926b214a1fb081df18305921dedae269977Jeff Layton 7816dcd3926b214a1fb081df18305921dedae269977Jeff Layton if (gss_destroying_context(cred)) 7826dcd3926b214a1fb081df18305921dedae269977Jeff Layton return; 7836dcd3926b214a1fb081df18305921dedae269977Jeff Layton gss_destroy_nullcred(cred); 7846dcd3926b214a1fb081df18305921dedae269977Jeff Layton} 7856dcd3926b214a1fb081df18305921dedae269977Jeff Layton 7861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 7871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Lookup RPCSEC_GSS cred for the current process 7881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 7891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct rpc_cred * 7908a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebustgss_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) 7911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7928a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebust return rpcauth_lookup_credcache(auth, acred, flags); 7931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct rpc_cred * 7968a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebustgss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) 7971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 7991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *cred = NULL; 8001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err = -ENOMEM; 8011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8028885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: gss_create_cred for uid %d, flavor %d\n", 8031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds acred->uid, auth->au_flavor); 8041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8050f38b873aeaae698c3693748438547c8493165fbTrond Myklebust if (!(cred = kzalloc(sizeof(*cred), GFP_NOFS))) 8061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_err; 8071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8085fe4755e2526a2aa82b7ed8daeb3aed74a236925Trond Myklebust rpcauth_init_cred(&cred->gc_base, acred, auth, &gss_credops); 8091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 8101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Note: in order to force a call to call_refresh(), we deliberately 8111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * fail to flag the credential as RPCAUTH_CRED_UPTODATE. 8121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 813fc432dd90760a629c57026e57f65ff80a1a31d2fTrond Myklebust cred->gc_base.cr_flags = 1UL << RPCAUTH_CRED_NEW; 8141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cred->gc_service = gss_auth->service; 8157c67db3a8a98045744f06fcd6d8f476d9df0ba5cTrond Myklebust cred->gc_machine_cred = acred->machine_cred; 8160285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust kref_get(&gss_auth->kref); 8171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return &cred->gc_base; 8181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_err: 8208885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: gss_create_cred failed with error %d\n", err); 8211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ERR_PTR(err); 8221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 825fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebustgss_cred_init(struct rpc_auth *auth, struct rpc_cred *cred) 826fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust{ 827fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 828fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust struct gss_cred *gss_cred = container_of(cred,struct gss_cred, gc_base); 829fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust int err; 830fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust 831fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust do { 832fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust err = gss_create_upcall(gss_auth, gss_cred); 833fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust } while (err == -EAGAIN); 834fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust return err; 835fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust} 836fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust 837fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebuststatic int 8388a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebustgss_match(struct auth_cred *acred, struct rpc_cred *rc, int flags) 8391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base); 8411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 842cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust if (test_bit(RPCAUTH_CRED_NEW, &rc->cr_flags)) 8438a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebust goto out; 8441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Don't match with creds that have expired. */ 845cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust if (time_after(jiffies, gss_cred->gc_ctx->gc_expiry)) 846cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust return 0; 847cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust if (!test_bit(RPCAUTH_CRED_UPTODATE, &rc->cr_flags)) 8481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 8498a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebustout: 8507c67db3a8a98045744f06fcd6d8f476d9df0ba5cTrond Myklebust if (acred->machine_cred != gss_cred->gc_machine_cred) 8517c67db3a8a98045744f06fcd6d8f476d9df0ba5cTrond Myklebust return 0; 8521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (rc->cr_uid == acred->uid); 8531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 8561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds* Marshal credentials. 8571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds* Maybe we should keep a cached credential for performance reasons. 8581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds*/ 859d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyanstatic __be32 * 860d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyangss_marshal(struct rpc_task *task, __be32 *p) 8611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_cred *cred = task->tk_msg.rpc_cred; 8631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 8641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gc_base); 8651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 866d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan __be32 *cred_len; 8671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_rqst *req = task->tk_rqstp; 8681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 maj_stat = 0; 8691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_netobj mic; 8701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct kvec iov; 8711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_buf verf_buf; 8721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8738885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: %5u gss_marshal\n", task->tk_pid); 8741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *p++ = htonl(RPC_AUTH_GSS); 8761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cred_len = p++; 8771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock(&ctx->gc_seq_lock); 8791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds req->rq_seqno = ctx->gc_seq++; 8801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock(&ctx->gc_seq_lock); 8811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *p++ = htonl((u32) RPC_GSS_VERSION); 8831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *p++ = htonl((u32) ctx->gc_proc); 8841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *p++ = htonl((u32) req->rq_seqno); 8851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *p++ = htonl((u32) gss_cred->gc_service); 8861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = xdr_encode_netobj(p, &ctx->gc_wire_ctx); 8871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *cred_len = htonl((p - (cred_len + 1)) << 2); 8881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We compute the checksum for the verifier over the xdr-encoded bytes 8901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * starting with the xid and ending at the end of the credential: */ 891808012fbb23a52ec59352445d2076d175ad4ab26Chuck Lever iov.iov_base = xprt_skip_transport_header(task->tk_xprt, 892808012fbb23a52ec59352445d2076d175ad4ab26Chuck Lever req->rq_snd_buf.head[0].iov_base); 8931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iov.iov_len = (u8 *)p - (u8 *)iov.iov_base; 8941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 8951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* set verifier flavor*/ 8971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *p++ = htonl(RPC_AUTH_GSS); 8981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mic.data = (u8 *)(p + 1); 90000fd6e14255fe7a249315746386d640bc4e9e758J. Bruce Fields maj_stat = gss_get_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 9011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) { 902fc432dd90760a629c57026e57f65ff80a1a31d2fTrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 9031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (maj_stat != 0) { 9041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("gss_marshal: gss_get_mic FAILED (%d)\n", maj_stat); 9051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_put_ctx; 9061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = xdr_encode_opaque(p, NULL, mic.len); 9081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 9091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return p; 9101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_put_ctx: 9111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 9121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 9131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 915cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebuststatic int gss_renew_cred(struct rpc_task *task) 916cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust{ 917cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust struct rpc_cred *oldcred = task->tk_msg.rpc_cred; 918cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust struct gss_cred *gss_cred = container_of(oldcred, 919cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust struct gss_cred, 920cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust gc_base); 921cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust struct rpc_auth *auth = oldcred->cr_auth; 922cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust struct auth_cred acred = { 923cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust .uid = oldcred->cr_uid, 924cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust .machine_cred = gss_cred->gc_machine_cred, 925cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust }; 926cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust struct rpc_cred *new; 927cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust 928cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust new = gss_lookup_cred(auth, &acred, RPCAUTH_LOOKUP_NEW); 929cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust if (IS_ERR(new)) 930cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust return PTR_ERR(new); 931cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust task->tk_msg.rpc_cred = new; 932cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust put_rpccred(oldcred); 933cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust return 0; 934cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust} 935cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust 9361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 9371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds* Refresh credentials. XXX - finish 9381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds*/ 9391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 9401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_refresh(struct rpc_task *task) 9411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 942cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust struct rpc_cred *cred = task->tk_msg.rpc_cred; 943cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust int ret = 0; 944cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust 945cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags) && 946cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust !test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags)) { 947cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust ret = gss_renew_cred(task); 948cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust if (ret < 0) 949cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust goto out; 950cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust cred = task->tk_msg.rpc_cred; 951cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust } 9521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 953cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust if (test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) 954cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust ret = gss_refresh_upcall(task); 955cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebustout: 956cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust return ret; 9571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9590df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust/* Dummy refresh routine: used only when destroying the context */ 9600df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebuststatic int 9610df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebustgss_refresh_null(struct rpc_task *task) 9620df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust{ 9630df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust return -EACCES; 9640df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust} 9650df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust 966d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyanstatic __be32 * 967d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyangss_validate(struct rpc_task *task, __be32 *p) 9681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_cred *cred = task->tk_msg.rpc_cred; 9701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 971d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan __be32 seq; 9721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct kvec iov; 9731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_buf verf_buf; 9741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_netobj mic; 9751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 flav,len; 9761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 maj_stat; 9771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9788885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: %5u gss_validate\n", task->tk_pid); 9791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds flav = ntohl(*p++); 9811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((len = ntohl(*p++)) > RPC_MAX_AUTH_SIZE) 982cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793YOSHIFUJI Hideaki goto out_bad; 9831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (flav != RPC_AUTH_GSS) 9841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_bad; 9851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds seq = htonl(task->tk_rqstp->rq_seqno); 9861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iov.iov_base = &seq; 9871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iov.iov_len = sizeof(seq); 9881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 9891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mic.data = (u8 *)p; 9901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mic.len = len; 9911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 99200fd6e14255fe7a249315746386d640bc4e9e758J. Bruce Fields maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 9931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 994fc432dd90760a629c57026e57f65ff80a1a31d2fTrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 9950df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust if (maj_stat) { 996014313a9d66272ed37b9ebd64c3f30b596a4c8e1Joe Perches dprintk("RPC: %5u gss_validate: gss_verify_mic returned " 9970df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust "error 0x%08x\n", task->tk_pid, maj_stat); 9981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_bad; 9990df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust } 100024b2605becc10ca63c4c30808fa59a8abbf68727J. Bruce Fields /* We leave it to unwrap to calculate au_rslack. For now we just 100124b2605becc10ca63c4c30808fa59a8abbf68727J. Bruce Fields * calculate the length of the verifier: */ 10021be27f36601973815171db684c711d30557cf50cTrond Myklebust cred->cr_auth->au_verfsize = XDR_QUADLEN(len) + 2; 10031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 10048885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: %5u gss_validate: gss_verify_mic succeeded.\n", 10051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds task->tk_pid); 10061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return p + XDR_QUADLEN(len); 10071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_bad: 10081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 10098885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: %5u gss_validate failed.\n", task->tk_pid); 10101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 10111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int 10141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1015d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan kxdrproc_t encode, struct rpc_rqst *rqstp, __be32 *p, void *obj) 10161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 10181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_buf integ_buf; 1019d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan __be32 *integ_len = NULL; 10201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_netobj mic; 1021d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan u32 offset; 1022d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan __be32 *q; 10231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct kvec *iov; 10241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 maj_stat = 0; 10251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = -EIO; 10261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds integ_len = p++; 10281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 10291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *p++ = htonl(rqstp->rq_seqno); 10301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 103188a9fe8cae3bb52e82489447f45e8d7ba1409ca8Trond Myklebust status = encode(rqstp, p, obj); 10321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status) 10331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 10341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (xdr_buf_subsegment(snd_buf, &integ_buf, 10361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds offset, snd_buf->len - offset)) 10371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 10381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *integ_len = htonl(integ_buf.len); 10391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* guess whether we're in the head or the tail: */ 1041cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793YOSHIFUJI Hideaki if (snd_buf->page_len || snd_buf->tail[0].iov_len) 10421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iov = snd_buf->tail; 10431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 10441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iov = snd_buf->head; 10451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = iov->iov_base + iov->iov_len; 10461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mic.data = (u8 *)(p + 1); 10471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 104800fd6e14255fe7a249315746386d640bc4e9e758J. Bruce Fields maj_stat = gss_get_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 10491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = -EIO; /* XXX? */ 10501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1051fc432dd90760a629c57026e57f65ff80a1a31d2fTrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 10521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (maj_stat) 10531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 10541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q = xdr_encode_opaque(p, NULL, mic.len); 10551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds offset = (u8 *)q - (u8 *)p; 10571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iov->iov_len += offset; 10581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds snd_buf->len += offset; 10591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 10601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10622d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsstatic void 10632d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldspriv_release_snd_buf(struct rpc_rqst *rqstp) 10642d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields{ 10652d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields int i; 10662d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 10672d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) 10682d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields __free_page(rqstp->rq_enc_pages[i]); 10692d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields kfree(rqstp->rq_enc_pages); 10702d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields} 10712d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 10722d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsstatic int 10732d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsalloc_enc_pages(struct rpc_rqst *rqstp) 10742d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields{ 10752d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 10762d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields int first, last, i; 10772d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 10782d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (snd_buf->page_len == 0) { 10792d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields rqstp->rq_enc_pages_num = 0; 10802d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return 0; 10812d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields } 10822d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 10832d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields first = snd_buf->page_base >> PAGE_CACHE_SHIFT; 10842d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields last = (snd_buf->page_base + snd_buf->page_len - 1) >> PAGE_CACHE_SHIFT; 10852d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields rqstp->rq_enc_pages_num = last - first + 1 + 1; 10862d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields rqstp->rq_enc_pages 10872d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields = kmalloc(rqstp->rq_enc_pages_num * sizeof(struct page *), 10882d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields GFP_NOFS); 10892d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (!rqstp->rq_enc_pages) 10902d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields goto out; 10912d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) { 10922d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields rqstp->rq_enc_pages[i] = alloc_page(GFP_NOFS); 10932d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (rqstp->rq_enc_pages[i] == NULL) 10942d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields goto out_free; 10952d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields } 10962d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields rqstp->rq_release_snd_buf = priv_release_snd_buf; 10972d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return 0; 10982d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsout_free: 10992d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields for (i--; i >= 0; i--) { 11002d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields __free_page(rqstp->rq_enc_pages[i]); 11012d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields } 11022d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsout: 11032d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return -EAGAIN; 11042d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields} 11052d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 11062d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsstatic inline int 11072d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsgss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1108d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan kxdrproc_t encode, struct rpc_rqst *rqstp, __be32 *p, void *obj) 11092d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields{ 11102d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 11112d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields u32 offset; 11122d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields u32 maj_stat; 11132d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields int status; 1114d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan __be32 *opaque_len; 11152d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields struct page **inpages; 11162d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields int first; 11172d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields int pad; 11182d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields struct kvec *iov; 11192d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields char *tmp; 11202d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 11212d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields opaque_len = p++; 11222d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 11232d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields *p++ = htonl(rqstp->rq_seqno); 11242d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 112588a9fe8cae3bb52e82489447f45e8d7ba1409ca8Trond Myklebust status = encode(rqstp, p, obj); 11262d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (status) 11272d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return status; 11282d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 11292d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields status = alloc_enc_pages(rqstp); 11302d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (status) 11312d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return status; 11322d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields first = snd_buf->page_base >> PAGE_CACHE_SHIFT; 11332d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields inpages = snd_buf->pages + first; 11342d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields snd_buf->pages = rqstp->rq_enc_pages; 11352d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields snd_buf->page_base -= first << PAGE_CACHE_SHIFT; 11362d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields /* Give the tail its own page, in case we need extra space in the 11372d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields * head when wrapping: */ 11382d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) { 11392d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields tmp = page_address(rqstp->rq_enc_pages[rqstp->rq_enc_pages_num - 1]); 11402d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields memcpy(tmp, snd_buf->tail[0].iov_base, snd_buf->tail[0].iov_len); 11412d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields snd_buf->tail[0].iov_base = tmp; 11422d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields } 114300fd6e14255fe7a249315746386d640bc4e9e758J. Bruce Fields maj_stat = gss_wrap(ctx->gc_gss_ctx, offset, snd_buf, inpages); 11442d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields /* RPC_SLACK_SPACE should prevent this ever happening: */ 11452d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields BUG_ON(snd_buf->len > snd_buf->buflen); 1146cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793YOSHIFUJI Hideaki status = -EIO; 11472d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields /* We're assuming that when GSS_S_CONTEXT_EXPIRED, the encryption was 11482d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields * done anyway, so it's safe to put the request on the wire: */ 11492d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1150fc432dd90760a629c57026e57f65ff80a1a31d2fTrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 11512d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields else if (maj_stat) 11522d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return status; 11532d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 11542d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields *opaque_len = htonl(snd_buf->len - offset); 11552d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields /* guess whether we're in the head or the tail: */ 11562d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) 11572d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields iov = snd_buf->tail; 11582d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields else 11592d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields iov = snd_buf->head; 11602d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields p = iov->iov_base + iov->iov_len; 11612d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields pad = 3 - ((snd_buf->len - offset - 1) & 3); 11622d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields memset(p, 0, pad); 11632d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields iov->iov_len += pad; 11642d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields snd_buf->len += pad; 11652d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 11662d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return 0; 11672d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields} 11682d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 11691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 11701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_wrap_req(struct rpc_task *task, 1171d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan kxdrproc_t encode, void *rqstp, __be32 *p, void *obj) 11721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_cred *cred = task->tk_msg.rpc_cred; 11741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 11751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gc_base); 11761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 11771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = -EIO; 11781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11798885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: %5u gss_wrap_req\n", task->tk_pid); 11801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) { 11811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The spec seems a little ambiguous here, but I think that not 11821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * wrapping context destruction requests makes the most sense. 11831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 118488a9fe8cae3bb52e82489447f45e8d7ba1409ca8Trond Myklebust status = encode(rqstp, p, obj); 11851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 11861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (gss_cred->gc_service) { 11881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case RPC_GSS_SVC_NONE: 118988a9fe8cae3bb52e82489447f45e8d7ba1409ca8Trond Myklebust status = encode(rqstp, p, obj); 11901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 11911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case RPC_GSS_SVC_INTEGRITY: 11921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = gss_wrap_req_integ(cred, ctx, encode, 11931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rqstp, p, obj); 11941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1195cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793YOSHIFUJI Hideaki case RPC_GSS_SVC_PRIVACY: 11962d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields status = gss_wrap_req_priv(cred, ctx, encode, 11972d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields rqstp, p, obj); 11981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 11991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 12011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 12028885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: %5u gss_wrap_req returning %d\n", task->tk_pid, status); 12031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 12041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int 12071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_unwrap_resp_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1208d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan struct rpc_rqst *rqstp, __be32 **p) 12091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 12111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_buf integ_buf; 12121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_netobj mic; 12131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 data_offset, mic_offset; 12141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 integ_len; 12151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 maj_stat; 12161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = -EIO; 12171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds integ_len = ntohl(*(*p)++); 12191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (integ_len & 3) 12201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 12211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds data_offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 12221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mic_offset = integ_len + data_offset; 12231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mic_offset > rcv_buf->len) 12241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 12251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ntohl(*(*p)++) != rqstp->rq_seqno) 12261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 12271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (xdr_buf_subsegment(rcv_buf, &integ_buf, data_offset, 12291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mic_offset - data_offset)) 12301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 12311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (xdr_buf_read_netobj(rcv_buf, &mic, mic_offset)) 12331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 12341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 123500fd6e14255fe7a249315746386d640bc4e9e758J. Bruce Fields maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 12361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1237fc432dd90760a629c57026e57f65ff80a1a31d2fTrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 12381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (maj_stat != GSS_S_COMPLETE) 12391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 12401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 12411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12432d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsstatic inline int 12442d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsgss_unwrap_resp_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1245d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan struct rpc_rqst *rqstp, __be32 **p) 12462d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields{ 12472d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 12482d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields u32 offset; 12492d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields u32 opaque_len; 12502d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields u32 maj_stat; 12512d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields int status = -EIO; 12522d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 12532d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields opaque_len = ntohl(*(*p)++); 12542d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 12552d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (offset + opaque_len > rcv_buf->len) 12562d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return status; 12572d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields /* remove padding: */ 12582d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields rcv_buf->len = offset + opaque_len; 12592d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 126000fd6e14255fe7a249315746386d640bc4e9e758J. Bruce Fields maj_stat = gss_unwrap(ctx->gc_gss_ctx, offset, rcv_buf); 12612d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1262fc432dd90760a629c57026e57f65ff80a1a31d2fTrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 12632d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (maj_stat != GSS_S_COMPLETE) 12642d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return status; 12652d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (ntohl(*(*p)++) != rqstp->rq_seqno) 12662d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return status; 12672d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 12682d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return 0; 12692d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields} 12702d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 12712d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 12721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 12731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_unwrap_resp(struct rpc_task *task, 1274d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan kxdrproc_t decode, void *rqstp, __be32 *p, void *obj) 12751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_cred *cred = task->tk_msg.rpc_cred; 12771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 12781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gc_base); 12791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1280d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan __be32 *savedp = p; 12812d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields struct kvec *head = ((struct rpc_rqst *)rqstp)->rq_rcv_buf.head; 12822d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields int savedlen = head->iov_len; 12831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = -EIO; 12841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) 12861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_decode; 12871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (gss_cred->gc_service) { 12881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case RPC_GSS_SVC_NONE: 12891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 12901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case RPC_GSS_SVC_INTEGRITY: 12911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = gss_unwrap_resp_integ(cred, ctx, rqstp, &p); 12921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status) 12931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 12941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1295cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793YOSHIFUJI Hideaki case RPC_GSS_SVC_PRIVACY: 12962d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields status = gss_unwrap_resp_priv(cred, ctx, rqstp, &p); 12972d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (status) 12982d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields goto out; 12991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 13001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 130124b2605becc10ca63c4c30808fa59a8abbf68727J. Bruce Fields /* take into account extra slack for integrity and privacy cases: */ 13021be27f36601973815171db684c711d30557cf50cTrond Myklebust cred->cr_auth->au_rslack = cred->cr_auth->au_verfsize + (p - savedp) 13032d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields + (savedlen - head->iov_len); 13041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_decode: 130588a9fe8cae3bb52e82489447f45e8d7ba1409ca8Trond Myklebust status = decode(rqstp, p, obj); 13061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 13071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 13088885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: %5u gss_unwrap_resp returning %d\n", task->tk_pid, 13091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status); 13101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 13111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1312cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793YOSHIFUJI Hideaki 1313f1c0a8615090359d57e096157feb9f900cbb233cTrond Myklebuststatic const struct rpc_authops authgss_ops = { 13141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .owner = THIS_MODULE, 13151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .au_flavor = RPC_AUTH_GSS, 13161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .au_name = "RPCSEC_GSS", 13171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .create = gss_create, 13181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .destroy = gss_destroy, 13191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .lookup_cred = gss_lookup_cred, 13201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crcreate = gss_create_cred 13211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 13221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1323f1c0a8615090359d57e096157feb9f900cbb233cTrond Myklebuststatic const struct rpc_credops gss_credops = { 13241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .cr_name = "AUTH_GSS", 13251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crdestroy = gss_destroy_cred, 1326fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust .cr_init = gss_cred_init, 13275c691044ecbca04dd558fca4c754121689fe1b34Trond Myklebust .crbind = rpcauth_generic_bind_cred, 13281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crmatch = gss_match, 13291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crmarshal = gss_marshal, 13301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crrefresh = gss_refresh, 13311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crvalidate = gss_validate, 13321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crwrap_req = gss_wrap_req, 13331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crunwrap_resp = gss_unwrap_resp, 13341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 13351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13360df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebuststatic const struct rpc_credops gss_nullops = { 13370df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust .cr_name = "AUTH_GSS", 13386dcd3926b214a1fb081df18305921dedae269977Jeff Layton .crdestroy = gss_destroy_nullcred, 13395c691044ecbca04dd558fca4c754121689fe1b34Trond Myklebust .crbind = rpcauth_generic_bind_cred, 13400df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust .crmatch = gss_match, 13410df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust .crmarshal = gss_marshal, 13420df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust .crrefresh = gss_refresh_null, 13430df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust .crvalidate = gss_validate, 13440df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust .crwrap_req = gss_wrap_req, 13450df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust .crunwrap_resp = gss_unwrap_resp, 13460df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust}; 13470df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust 13481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct rpc_pipe_ops gss_upcall_ops = { 13491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .upcall = gss_pipe_upcall, 13501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .downcall = gss_pipe_downcall, 13511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .destroy_msg = gss_pipe_destroy_msg, 13521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .release_pipe = gss_pipe_release, 13531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 13541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 13561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Initialize RPCSEC_GSS module 13571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 13581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int __init init_rpcsec_gss(void) 13591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err = 0; 13611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = rpcauth_register(&authgss_ops); 13631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) 13641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 13651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = gss_svc_init(); 13661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) 13671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_unregister; 13681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 13691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_unregister: 13701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rpcauth_unregister(&authgss_ops); 13711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 13721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 13731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void __exit exit_rpcsec_gss(void) 13761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_svc_shutdown(); 13781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rpcauth_unregister(&authgss_ops); 13791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_LICENSE("GPL"); 13821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_init(init_rpcsec_gss) 13831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_exit(exit_rpcsec_gss) 1384