auth_gss.c revision 0285ed1f12298e5304f0f2642e2cf31a5f302e61
1/* 2 * linux/net/sunrpc/auth_gss/auth_gss.c 3 * 4 * RPCSEC_GSS client authentication. 5 * 6 * Copyright (c) 2000 The Regents of the University of Michigan. 7 * All rights reserved. 8 * 9 * Dug Song <dugsong@monkey.org> 10 * Andy Adamson <andros@umich.edu> 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its 22 * contributors may be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 * 37 * $Id$ 38 */ 39 40 41#include <linux/module.h> 42#include <linux/init.h> 43#include <linux/types.h> 44#include <linux/slab.h> 45#include <linux/sched.h> 46#include <linux/pagemap.h> 47#include <linux/sunrpc/clnt.h> 48#include <linux/sunrpc/auth.h> 49#include <linux/sunrpc/auth_gss.h> 50#include <linux/sunrpc/svcauth_gss.h> 51#include <linux/sunrpc/gss_err.h> 52#include <linux/workqueue.h> 53#include <linux/sunrpc/rpc_pipe_fs.h> 54#include <linux/sunrpc/gss_api.h> 55#include <asm/uaccess.h> 56 57static const struct rpc_authops authgss_ops; 58 59static const struct rpc_credops gss_credops; 60 61#ifdef RPC_DEBUG 62# define RPCDBG_FACILITY RPCDBG_AUTH 63#endif 64 65#define NFS_NGROUPS 16 66 67#define GSS_CRED_SLACK 1024 /* XXX: unused */ 68/* length of a krb5 verifier (48), plus data added before arguments when 69 * using integrity (two 4-byte integers): */ 70#define GSS_VERF_SLACK 100 71 72/* XXX this define must match the gssd define 73* as it is passed to gssd to signal the use of 74* machine creds should be part of the shared rpc interface */ 75 76#define CA_RUN_AS_MACHINE 0x00000200 77 78/* dump the buffer in `emacs-hexl' style */ 79#define isprint(c) ((c > 0x1f) && (c < 0x7f)) 80 81struct gss_auth { 82 struct kref kref; 83 struct rpc_auth rpc_auth; 84 struct gss_api_mech *mech; 85 enum rpc_gss_svc service; 86 struct rpc_clnt *client; 87 struct dentry *dentry; 88}; 89 90static void gss_free_ctx(struct gss_cl_ctx *); 91static struct rpc_pipe_ops gss_upcall_ops; 92 93static inline struct gss_cl_ctx * 94gss_get_ctx(struct gss_cl_ctx *ctx) 95{ 96 atomic_inc(&ctx->count); 97 return ctx; 98} 99 100static inline void 101gss_put_ctx(struct gss_cl_ctx *ctx) 102{ 103 if (atomic_dec_and_test(&ctx->count)) 104 gss_free_ctx(ctx); 105} 106 107/* gss_cred_set_ctx: 108 * called by gss_upcall_callback and gss_create_upcall in order 109 * to set the gss context. The actual exchange of an old context 110 * and a new one is protected by the inode->i_lock. 111 */ 112static void 113gss_cred_set_ctx(struct rpc_cred *cred, struct gss_cl_ctx *ctx) 114{ 115 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 116 struct gss_cl_ctx *old; 117 118 old = gss_cred->gc_ctx; 119 rcu_assign_pointer(gss_cred->gc_ctx, ctx); 120 set_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 121 clear_bit(RPCAUTH_CRED_NEW, &cred->cr_flags); 122 if (old) 123 gss_put_ctx(old); 124} 125 126static int 127gss_cred_is_uptodate_ctx(struct rpc_cred *cred) 128{ 129 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 130 int res = 0; 131 132 rcu_read_lock(); 133 if (test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) && gss_cred->gc_ctx) 134 res = 1; 135 rcu_read_unlock(); 136 return res; 137} 138 139static const void * 140simple_get_bytes(const void *p, const void *end, void *res, size_t len) 141{ 142 const void *q = (const void *)((const char *)p + len); 143 if (unlikely(q > end || q < p)) 144 return ERR_PTR(-EFAULT); 145 memcpy(res, p, len); 146 return q; 147} 148 149static inline const void * 150simple_get_netobj(const void *p, const void *end, struct xdr_netobj *dest) 151{ 152 const void *q; 153 unsigned int len; 154 155 p = simple_get_bytes(p, end, &len, sizeof(len)); 156 if (IS_ERR(p)) 157 return p; 158 q = (const void *)((const char *)p + len); 159 if (unlikely(q > end || q < p)) 160 return ERR_PTR(-EFAULT); 161 dest->data = kmemdup(p, len, GFP_KERNEL); 162 if (unlikely(dest->data == NULL)) 163 return ERR_PTR(-ENOMEM); 164 dest->len = len; 165 return q; 166} 167 168static struct gss_cl_ctx * 169gss_cred_get_ctx(struct rpc_cred *cred) 170{ 171 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 172 struct gss_cl_ctx *ctx = NULL; 173 174 rcu_read_lock(); 175 if (gss_cred->gc_ctx) 176 ctx = gss_get_ctx(gss_cred->gc_ctx); 177 rcu_read_unlock(); 178 return ctx; 179} 180 181static struct gss_cl_ctx * 182gss_alloc_context(void) 183{ 184 struct gss_cl_ctx *ctx; 185 186 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 187 if (ctx != NULL) { 188 ctx->gc_proc = RPC_GSS_PROC_DATA; 189 ctx->gc_seq = 1; /* NetApp 6.4R1 doesn't accept seq. no. 0 */ 190 spin_lock_init(&ctx->gc_seq_lock); 191 atomic_set(&ctx->count,1); 192 } 193 return ctx; 194} 195 196#define GSSD_MIN_TIMEOUT (60 * 60) 197static const void * 198gss_fill_context(const void *p, const void *end, struct gss_cl_ctx *ctx, struct gss_api_mech *gm) 199{ 200 const void *q; 201 unsigned int seclen; 202 unsigned int timeout; 203 u32 window_size; 204 int ret; 205 206 /* First unsigned int gives the lifetime (in seconds) of the cred */ 207 p = simple_get_bytes(p, end, &timeout, sizeof(timeout)); 208 if (IS_ERR(p)) 209 goto err; 210 if (timeout == 0) 211 timeout = GSSD_MIN_TIMEOUT; 212 ctx->gc_expiry = jiffies + (unsigned long)timeout * HZ * 3 / 4; 213 /* Sequence number window. Determines the maximum number of simultaneous requests */ 214 p = simple_get_bytes(p, end, &window_size, sizeof(window_size)); 215 if (IS_ERR(p)) 216 goto err; 217 ctx->gc_win = window_size; 218 /* gssd signals an error by passing ctx->gc_win = 0: */ 219 if (ctx->gc_win == 0) { 220 /* in which case, p points to an error code which we ignore */ 221 p = ERR_PTR(-EACCES); 222 goto err; 223 } 224 /* copy the opaque wire context */ 225 p = simple_get_netobj(p, end, &ctx->gc_wire_ctx); 226 if (IS_ERR(p)) 227 goto err; 228 /* import the opaque security context */ 229 p = simple_get_bytes(p, end, &seclen, sizeof(seclen)); 230 if (IS_ERR(p)) 231 goto err; 232 q = (const void *)((const char *)p + seclen); 233 if (unlikely(q > end || q < p)) { 234 p = ERR_PTR(-EFAULT); 235 goto err; 236 } 237 ret = gss_import_sec_context(p, seclen, gm, &ctx->gc_gss_ctx); 238 if (ret < 0) { 239 p = ERR_PTR(ret); 240 goto err; 241 } 242 return q; 243err: 244 dprintk("RPC: gss_fill_context returning %ld\n", -PTR_ERR(p)); 245 return p; 246} 247 248 249struct gss_upcall_msg { 250 atomic_t count; 251 uid_t uid; 252 struct rpc_pipe_msg msg; 253 struct list_head list; 254 struct gss_auth *auth; 255 struct rpc_wait_queue rpc_waitqueue; 256 wait_queue_head_t waitqueue; 257 struct gss_cl_ctx *ctx; 258}; 259 260static void 261gss_release_msg(struct gss_upcall_msg *gss_msg) 262{ 263 if (!atomic_dec_and_test(&gss_msg->count)) 264 return; 265 BUG_ON(!list_empty(&gss_msg->list)); 266 if (gss_msg->ctx != NULL) 267 gss_put_ctx(gss_msg->ctx); 268 kfree(gss_msg); 269} 270 271static struct gss_upcall_msg * 272__gss_find_upcall(struct rpc_inode *rpci, uid_t uid) 273{ 274 struct gss_upcall_msg *pos; 275 list_for_each_entry(pos, &rpci->in_downcall, list) { 276 if (pos->uid != uid) 277 continue; 278 atomic_inc(&pos->count); 279 dprintk("RPC: gss_find_upcall found msg %p\n", pos); 280 return pos; 281 } 282 dprintk("RPC: gss_find_upcall found nothing\n"); 283 return NULL; 284} 285 286/* Try to add a upcall to the pipefs queue. 287 * If an upcall owned by our uid already exists, then we return a reference 288 * to that upcall instead of adding the new upcall. 289 */ 290static inline struct gss_upcall_msg * 291gss_add_msg(struct gss_auth *gss_auth, struct gss_upcall_msg *gss_msg) 292{ 293 struct inode *inode = gss_auth->dentry->d_inode; 294 struct rpc_inode *rpci = RPC_I(inode); 295 struct gss_upcall_msg *old; 296 297 spin_lock(&inode->i_lock); 298 old = __gss_find_upcall(rpci, gss_msg->uid); 299 if (old == NULL) { 300 atomic_inc(&gss_msg->count); 301 list_add(&gss_msg->list, &rpci->in_downcall); 302 } else 303 gss_msg = old; 304 spin_unlock(&inode->i_lock); 305 return gss_msg; 306} 307 308static void 309__gss_unhash_msg(struct gss_upcall_msg *gss_msg) 310{ 311 list_del_init(&gss_msg->list); 312 rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 313 wake_up_all(&gss_msg->waitqueue); 314 atomic_dec(&gss_msg->count); 315} 316 317static void 318gss_unhash_msg(struct gss_upcall_msg *gss_msg) 319{ 320 struct gss_auth *gss_auth = gss_msg->auth; 321 struct inode *inode = gss_auth->dentry->d_inode; 322 323 if (list_empty(&gss_msg->list)) 324 return; 325 spin_lock(&inode->i_lock); 326 if (!list_empty(&gss_msg->list)) 327 __gss_unhash_msg(gss_msg); 328 spin_unlock(&inode->i_lock); 329} 330 331static void 332gss_upcall_callback(struct rpc_task *task) 333{ 334 struct gss_cred *gss_cred = container_of(task->tk_msg.rpc_cred, 335 struct gss_cred, gc_base); 336 struct gss_upcall_msg *gss_msg = gss_cred->gc_upcall; 337 struct inode *inode = gss_msg->auth->dentry->d_inode; 338 339 spin_lock(&inode->i_lock); 340 if (gss_msg->ctx) 341 gss_cred_set_ctx(task->tk_msg.rpc_cred, gss_get_ctx(gss_msg->ctx)); 342 else 343 task->tk_status = gss_msg->msg.errno; 344 gss_cred->gc_upcall = NULL; 345 rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 346 spin_unlock(&inode->i_lock); 347 gss_release_msg(gss_msg); 348} 349 350static inline struct gss_upcall_msg * 351gss_alloc_msg(struct gss_auth *gss_auth, uid_t uid) 352{ 353 struct gss_upcall_msg *gss_msg; 354 355 gss_msg = kzalloc(sizeof(*gss_msg), GFP_KERNEL); 356 if (gss_msg != NULL) { 357 INIT_LIST_HEAD(&gss_msg->list); 358 rpc_init_wait_queue(&gss_msg->rpc_waitqueue, "RPCSEC_GSS upcall waitq"); 359 init_waitqueue_head(&gss_msg->waitqueue); 360 atomic_set(&gss_msg->count, 1); 361 gss_msg->msg.data = &gss_msg->uid; 362 gss_msg->msg.len = sizeof(gss_msg->uid); 363 gss_msg->uid = uid; 364 gss_msg->auth = gss_auth; 365 } 366 return gss_msg; 367} 368 369static struct gss_upcall_msg * 370gss_setup_upcall(struct rpc_clnt *clnt, struct gss_auth *gss_auth, struct rpc_cred *cred) 371{ 372 struct gss_upcall_msg *gss_new, *gss_msg; 373 374 gss_new = gss_alloc_msg(gss_auth, cred->cr_uid); 375 if (gss_new == NULL) 376 return ERR_PTR(-ENOMEM); 377 gss_msg = gss_add_msg(gss_auth, gss_new); 378 if (gss_msg == gss_new) { 379 int res = rpc_queue_upcall(gss_auth->dentry->d_inode, &gss_new->msg); 380 if (res) { 381 gss_unhash_msg(gss_new); 382 gss_msg = ERR_PTR(res); 383 } 384 } else 385 gss_release_msg(gss_new); 386 return gss_msg; 387} 388 389static inline int 390gss_refresh_upcall(struct rpc_task *task) 391{ 392 struct rpc_cred *cred = task->tk_msg.rpc_cred; 393 struct gss_auth *gss_auth = container_of(cred->cr_auth, 394 struct gss_auth, rpc_auth); 395 struct gss_cred *gss_cred = container_of(cred, 396 struct gss_cred, gc_base); 397 struct gss_upcall_msg *gss_msg; 398 struct inode *inode = gss_auth->dentry->d_inode; 399 int err = 0; 400 401 dprintk("RPC: %5u gss_refresh_upcall for uid %u\n", task->tk_pid, 402 cred->cr_uid); 403 gss_msg = gss_setup_upcall(task->tk_client, gss_auth, cred); 404 if (IS_ERR(gss_msg)) { 405 err = PTR_ERR(gss_msg); 406 goto out; 407 } 408 spin_lock(&inode->i_lock); 409 if (gss_cred->gc_upcall != NULL) 410 rpc_sleep_on(&gss_cred->gc_upcall->rpc_waitqueue, task, NULL, NULL); 411 else if (gss_msg->ctx == NULL && gss_msg->msg.errno >= 0) { 412 task->tk_timeout = 0; 413 gss_cred->gc_upcall = gss_msg; 414 /* gss_upcall_callback will release the reference to gss_upcall_msg */ 415 atomic_inc(&gss_msg->count); 416 rpc_sleep_on(&gss_msg->rpc_waitqueue, task, gss_upcall_callback, NULL); 417 } else 418 err = gss_msg->msg.errno; 419 spin_unlock(&inode->i_lock); 420 gss_release_msg(gss_msg); 421out: 422 dprintk("RPC: %5u gss_refresh_upcall for uid %u result %d\n", 423 task->tk_pid, cred->cr_uid, err); 424 return err; 425} 426 427static inline int 428gss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred) 429{ 430 struct inode *inode = gss_auth->dentry->d_inode; 431 struct rpc_cred *cred = &gss_cred->gc_base; 432 struct gss_upcall_msg *gss_msg; 433 DEFINE_WAIT(wait); 434 int err = 0; 435 436 dprintk("RPC: gss_upcall for uid %u\n", cred->cr_uid); 437 gss_msg = gss_setup_upcall(gss_auth->client, gss_auth, cred); 438 if (IS_ERR(gss_msg)) { 439 err = PTR_ERR(gss_msg); 440 goto out; 441 } 442 for (;;) { 443 prepare_to_wait(&gss_msg->waitqueue, &wait, TASK_INTERRUPTIBLE); 444 spin_lock(&inode->i_lock); 445 if (gss_msg->ctx != NULL || gss_msg->msg.errno < 0) { 446 break; 447 } 448 spin_unlock(&inode->i_lock); 449 if (signalled()) { 450 err = -ERESTARTSYS; 451 goto out_intr; 452 } 453 schedule(); 454 } 455 if (gss_msg->ctx) 456 gss_cred_set_ctx(cred, gss_get_ctx(gss_msg->ctx)); 457 else 458 err = gss_msg->msg.errno; 459 spin_unlock(&inode->i_lock); 460out_intr: 461 finish_wait(&gss_msg->waitqueue, &wait); 462 gss_release_msg(gss_msg); 463out: 464 dprintk("RPC: gss_create_upcall for uid %u result %d\n", 465 cred->cr_uid, err); 466 return err; 467} 468 469static ssize_t 470gss_pipe_upcall(struct file *filp, struct rpc_pipe_msg *msg, 471 char __user *dst, size_t buflen) 472{ 473 char *data = (char *)msg->data + msg->copied; 474 ssize_t mlen = msg->len; 475 ssize_t left; 476 477 if (mlen > buflen) 478 mlen = buflen; 479 left = copy_to_user(dst, data, mlen); 480 if (left < 0) { 481 msg->errno = left; 482 return left; 483 } 484 mlen -= left; 485 msg->copied += mlen; 486 msg->errno = 0; 487 return mlen; 488} 489 490#define MSG_BUF_MAXSIZE 1024 491 492static ssize_t 493gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen) 494{ 495 const void *p, *end; 496 void *buf; 497 struct rpc_clnt *clnt; 498 struct gss_upcall_msg *gss_msg; 499 struct inode *inode = filp->f_path.dentry->d_inode; 500 struct gss_cl_ctx *ctx; 501 uid_t uid; 502 ssize_t err = -EFBIG; 503 504 if (mlen > MSG_BUF_MAXSIZE) 505 goto out; 506 err = -ENOMEM; 507 buf = kmalloc(mlen, GFP_KERNEL); 508 if (!buf) 509 goto out; 510 511 clnt = RPC_I(inode)->private; 512 err = -EFAULT; 513 if (copy_from_user(buf, src, mlen)) 514 goto err; 515 516 end = (const void *)((char *)buf + mlen); 517 p = simple_get_bytes(buf, end, &uid, sizeof(uid)); 518 if (IS_ERR(p)) { 519 err = PTR_ERR(p); 520 goto err; 521 } 522 523 err = -ENOMEM; 524 ctx = gss_alloc_context(); 525 if (ctx == NULL) 526 goto err; 527 528 err = -ENOENT; 529 /* Find a matching upcall */ 530 spin_lock(&inode->i_lock); 531 gss_msg = __gss_find_upcall(RPC_I(inode), uid); 532 if (gss_msg == NULL) { 533 spin_unlock(&inode->i_lock); 534 goto err_put_ctx; 535 } 536 list_del_init(&gss_msg->list); 537 spin_unlock(&inode->i_lock); 538 539 p = gss_fill_context(p, end, ctx, gss_msg->auth->mech); 540 if (IS_ERR(p)) { 541 err = PTR_ERR(p); 542 gss_msg->msg.errno = (err == -EACCES) ? -EACCES : -EAGAIN; 543 goto err_release_msg; 544 } 545 gss_msg->ctx = gss_get_ctx(ctx); 546 err = mlen; 547 548err_release_msg: 549 spin_lock(&inode->i_lock); 550 __gss_unhash_msg(gss_msg); 551 spin_unlock(&inode->i_lock); 552 gss_release_msg(gss_msg); 553err_put_ctx: 554 gss_put_ctx(ctx); 555err: 556 kfree(buf); 557out: 558 dprintk("RPC: gss_pipe_downcall returning %Zd\n", err); 559 return err; 560} 561 562static void 563gss_pipe_release(struct inode *inode) 564{ 565 struct rpc_inode *rpci = RPC_I(inode); 566 struct gss_upcall_msg *gss_msg; 567 568 spin_lock(&inode->i_lock); 569 while (!list_empty(&rpci->in_downcall)) { 570 571 gss_msg = list_entry(rpci->in_downcall.next, 572 struct gss_upcall_msg, list); 573 gss_msg->msg.errno = -EPIPE; 574 atomic_inc(&gss_msg->count); 575 __gss_unhash_msg(gss_msg); 576 spin_unlock(&inode->i_lock); 577 gss_release_msg(gss_msg); 578 spin_lock(&inode->i_lock); 579 } 580 spin_unlock(&inode->i_lock); 581} 582 583static void 584gss_pipe_destroy_msg(struct rpc_pipe_msg *msg) 585{ 586 struct gss_upcall_msg *gss_msg = container_of(msg, struct gss_upcall_msg, msg); 587 static unsigned long ratelimit; 588 589 if (msg->errno < 0) { 590 dprintk("RPC: gss_pipe_destroy_msg releasing msg %p\n", 591 gss_msg); 592 atomic_inc(&gss_msg->count); 593 gss_unhash_msg(gss_msg); 594 if (msg->errno == -ETIMEDOUT) { 595 unsigned long now = jiffies; 596 if (time_after(now, ratelimit)) { 597 printk(KERN_WARNING "RPC: AUTH_GSS upcall timed out.\n" 598 "Please check user daemon is running!\n"); 599 ratelimit = now + 15*HZ; 600 } 601 } 602 gss_release_msg(gss_msg); 603 } 604} 605 606/* 607 * NOTE: we have the opportunity to use different 608 * parameters based on the input flavor (which must be a pseudoflavor) 609 */ 610static struct rpc_auth * 611gss_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor) 612{ 613 struct gss_auth *gss_auth; 614 struct rpc_auth * auth; 615 int err = -ENOMEM; /* XXX? */ 616 617 dprintk("RPC: creating GSS authenticator for client %p\n", clnt); 618 619 if (!try_module_get(THIS_MODULE)) 620 return ERR_PTR(err); 621 if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL))) 622 goto out_dec; 623 gss_auth->client = clnt; 624 err = -EINVAL; 625 gss_auth->mech = gss_mech_get_by_pseudoflavor(flavor); 626 if (!gss_auth->mech) { 627 printk(KERN_WARNING "%s: Pseudoflavor %d not found!", 628 __FUNCTION__, flavor); 629 goto err_free; 630 } 631 gss_auth->service = gss_pseudoflavor_to_service(gss_auth->mech, flavor); 632 if (gss_auth->service == 0) 633 goto err_put_mech; 634 auth = &gss_auth->rpc_auth; 635 auth->au_cslack = GSS_CRED_SLACK >> 2; 636 auth->au_rslack = GSS_VERF_SLACK >> 2; 637 auth->au_ops = &authgss_ops; 638 auth->au_flavor = flavor; 639 atomic_set(&auth->au_count, 1); 640 kref_init(&gss_auth->kref); 641 642 gss_auth->dentry = rpc_mkpipe(clnt->cl_dentry, gss_auth->mech->gm_name, 643 clnt, &gss_upcall_ops, RPC_PIPE_WAIT_FOR_OPEN); 644 if (IS_ERR(gss_auth->dentry)) { 645 err = PTR_ERR(gss_auth->dentry); 646 goto err_put_mech; 647 } 648 649 err = rpcauth_init_credcache(auth); 650 if (err) 651 goto err_unlink_pipe; 652 653 return auth; 654err_unlink_pipe: 655 rpc_unlink(gss_auth->dentry); 656err_put_mech: 657 gss_mech_put(gss_auth->mech); 658err_free: 659 kfree(gss_auth); 660out_dec: 661 module_put(THIS_MODULE); 662 return ERR_PTR(err); 663} 664 665static void 666gss_free(struct gss_auth *gss_auth) 667{ 668 rpc_unlink(gss_auth->dentry); 669 gss_auth->dentry = NULL; 670 gss_mech_put(gss_auth->mech); 671 672 kfree(gss_auth); 673 module_put(THIS_MODULE); 674} 675 676static void 677gss_free_callback(struct kref *kref) 678{ 679 struct gss_auth *gss_auth = container_of(kref, struct gss_auth, kref); 680 681 gss_free(gss_auth); 682} 683 684static void 685gss_destroy(struct rpc_auth *auth) 686{ 687 struct gss_auth *gss_auth; 688 689 dprintk("RPC: destroying GSS authenticator %p flavor %d\n", 690 auth, auth->au_flavor); 691 692 rpcauth_destroy_credcache(auth); 693 694 gss_auth = container_of(auth, struct gss_auth, rpc_auth); 695 kref_put(&gss_auth->kref, gss_free_callback); 696} 697 698/* gss_destroy_cred (and gss_destroy_ctx) are used to clean up after failure 699 * to create a new cred or context, so they check that things have been 700 * allocated before freeing them. */ 701static void 702gss_do_free_ctx(struct gss_cl_ctx *ctx) 703{ 704 dprintk("RPC: gss_free_ctx\n"); 705 706 if (ctx->gc_gss_ctx) 707 gss_delete_sec_context(&ctx->gc_gss_ctx); 708 709 kfree(ctx->gc_wire_ctx.data); 710 kfree(ctx); 711} 712 713static void 714gss_free_ctx_callback(struct rcu_head *head) 715{ 716 struct gss_cl_ctx *ctx = container_of(head, struct gss_cl_ctx, gc_rcu); 717 gss_do_free_ctx(ctx); 718} 719 720static void 721gss_free_ctx(struct gss_cl_ctx *ctx) 722{ 723 call_rcu(&ctx->gc_rcu, gss_free_ctx_callback); 724} 725 726static void 727gss_free_cred(struct gss_cred *gss_cred) 728{ 729 dprintk("RPC: gss_free_cred %p\n", gss_cred); 730 kfree(gss_cred); 731} 732 733static void 734gss_free_cred_callback(struct rcu_head *head) 735{ 736 struct gss_cred *gss_cred = container_of(head, struct gss_cred, gc_base.cr_rcu); 737 gss_free_cred(gss_cred); 738} 739 740static void 741gss_destroy_cred(struct rpc_cred *cred) 742{ 743 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 744 struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); 745 struct gss_cl_ctx *ctx = gss_cred->gc_ctx; 746 747 rcu_assign_pointer(gss_cred->gc_ctx, NULL); 748 call_rcu(&cred->cr_rcu, gss_free_cred_callback); 749 if (ctx) 750 gss_put_ctx(ctx); 751 kref_put(&gss_auth->kref, gss_free_callback); 752} 753 754/* 755 * Lookup RPCSEC_GSS cred for the current process 756 */ 757static struct rpc_cred * 758gss_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) 759{ 760 return rpcauth_lookup_credcache(auth, acred, flags); 761} 762 763static struct rpc_cred * 764gss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) 765{ 766 struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 767 struct gss_cred *cred = NULL; 768 int err = -ENOMEM; 769 770 dprintk("RPC: gss_create_cred for uid %d, flavor %d\n", 771 acred->uid, auth->au_flavor); 772 773 if (!(cred = kzalloc(sizeof(*cred), GFP_KERNEL))) 774 goto out_err; 775 776 rpcauth_init_cred(&cred->gc_base, acred, auth, &gss_credops); 777 /* 778 * Note: in order to force a call to call_refresh(), we deliberately 779 * fail to flag the credential as RPCAUTH_CRED_UPTODATE. 780 */ 781 cred->gc_base.cr_flags = 1UL << RPCAUTH_CRED_NEW; 782 cred->gc_service = gss_auth->service; 783 kref_get(&gss_auth->kref); 784 return &cred->gc_base; 785 786out_err: 787 dprintk("RPC: gss_create_cred failed with error %d\n", err); 788 return ERR_PTR(err); 789} 790 791static int 792gss_cred_init(struct rpc_auth *auth, struct rpc_cred *cred) 793{ 794 struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 795 struct gss_cred *gss_cred = container_of(cred,struct gss_cred, gc_base); 796 int err; 797 798 do { 799 err = gss_create_upcall(gss_auth, gss_cred); 800 } while (err == -EAGAIN); 801 return err; 802} 803 804static int 805gss_match(struct auth_cred *acred, struct rpc_cred *rc, int flags) 806{ 807 struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base); 808 809 /* 810 * If the searchflags have set RPCAUTH_LOOKUP_NEW, then 811 * we don't really care if the credential has expired or not, 812 * since the caller should be prepared to reinitialise it. 813 */ 814 if ((flags & RPCAUTH_LOOKUP_NEW) && test_bit(RPCAUTH_CRED_NEW, &rc->cr_flags)) 815 goto out; 816 /* Don't match with creds that have expired. */ 817 if (gss_cred->gc_ctx && time_after(jiffies, gss_cred->gc_ctx->gc_expiry)) 818 return 0; 819out: 820 return (rc->cr_uid == acred->uid); 821} 822 823/* 824* Marshal credentials. 825* Maybe we should keep a cached credential for performance reasons. 826*/ 827static __be32 * 828gss_marshal(struct rpc_task *task, __be32 *p) 829{ 830 struct rpc_cred *cred = task->tk_msg.rpc_cred; 831 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 832 gc_base); 833 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 834 __be32 *cred_len; 835 struct rpc_rqst *req = task->tk_rqstp; 836 u32 maj_stat = 0; 837 struct xdr_netobj mic; 838 struct kvec iov; 839 struct xdr_buf verf_buf; 840 841 dprintk("RPC: %5u gss_marshal\n", task->tk_pid); 842 843 *p++ = htonl(RPC_AUTH_GSS); 844 cred_len = p++; 845 846 spin_lock(&ctx->gc_seq_lock); 847 req->rq_seqno = ctx->gc_seq++; 848 spin_unlock(&ctx->gc_seq_lock); 849 850 *p++ = htonl((u32) RPC_GSS_VERSION); 851 *p++ = htonl((u32) ctx->gc_proc); 852 *p++ = htonl((u32) req->rq_seqno); 853 *p++ = htonl((u32) gss_cred->gc_service); 854 p = xdr_encode_netobj(p, &ctx->gc_wire_ctx); 855 *cred_len = htonl((p - (cred_len + 1)) << 2); 856 857 /* We compute the checksum for the verifier over the xdr-encoded bytes 858 * starting with the xid and ending at the end of the credential: */ 859 iov.iov_base = xprt_skip_transport_header(task->tk_xprt, 860 req->rq_snd_buf.head[0].iov_base); 861 iov.iov_len = (u8 *)p - (u8 *)iov.iov_base; 862 xdr_buf_from_iov(&iov, &verf_buf); 863 864 /* set verifier flavor*/ 865 *p++ = htonl(RPC_AUTH_GSS); 866 867 mic.data = (u8 *)(p + 1); 868 maj_stat = gss_get_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 869 if (maj_stat == GSS_S_CONTEXT_EXPIRED) { 870 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 871 } else if (maj_stat != 0) { 872 printk("gss_marshal: gss_get_mic FAILED (%d)\n", maj_stat); 873 goto out_put_ctx; 874 } 875 p = xdr_encode_opaque(p, NULL, mic.len); 876 gss_put_ctx(ctx); 877 return p; 878out_put_ctx: 879 gss_put_ctx(ctx); 880 return NULL; 881} 882 883/* 884* Refresh credentials. XXX - finish 885*/ 886static int 887gss_refresh(struct rpc_task *task) 888{ 889 890 if (!gss_cred_is_uptodate_ctx(task->tk_msg.rpc_cred)) 891 return gss_refresh_upcall(task); 892 return 0; 893} 894 895static __be32 * 896gss_validate(struct rpc_task *task, __be32 *p) 897{ 898 struct rpc_cred *cred = task->tk_msg.rpc_cred; 899 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 900 __be32 seq; 901 struct kvec iov; 902 struct xdr_buf verf_buf; 903 struct xdr_netobj mic; 904 u32 flav,len; 905 u32 maj_stat; 906 907 dprintk("RPC: %5u gss_validate\n", task->tk_pid); 908 909 flav = ntohl(*p++); 910 if ((len = ntohl(*p++)) > RPC_MAX_AUTH_SIZE) 911 goto out_bad; 912 if (flav != RPC_AUTH_GSS) 913 goto out_bad; 914 seq = htonl(task->tk_rqstp->rq_seqno); 915 iov.iov_base = &seq; 916 iov.iov_len = sizeof(seq); 917 xdr_buf_from_iov(&iov, &verf_buf); 918 mic.data = (u8 *)p; 919 mic.len = len; 920 921 maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 922 if (maj_stat == GSS_S_CONTEXT_EXPIRED) 923 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 924 if (maj_stat) 925 goto out_bad; 926 /* We leave it to unwrap to calculate au_rslack. For now we just 927 * calculate the length of the verifier: */ 928 cred->cr_auth->au_verfsize = XDR_QUADLEN(len) + 2; 929 gss_put_ctx(ctx); 930 dprintk("RPC: %5u gss_validate: gss_verify_mic succeeded.\n", 931 task->tk_pid); 932 return p + XDR_QUADLEN(len); 933out_bad: 934 gss_put_ctx(ctx); 935 dprintk("RPC: %5u gss_validate failed.\n", task->tk_pid); 936 return NULL; 937} 938 939static inline int 940gss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 941 kxdrproc_t encode, struct rpc_rqst *rqstp, __be32 *p, void *obj) 942{ 943 struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 944 struct xdr_buf integ_buf; 945 __be32 *integ_len = NULL; 946 struct xdr_netobj mic; 947 u32 offset; 948 __be32 *q; 949 struct kvec *iov; 950 u32 maj_stat = 0; 951 int status = -EIO; 952 953 integ_len = p++; 954 offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 955 *p++ = htonl(rqstp->rq_seqno); 956 957 status = encode(rqstp, p, obj); 958 if (status) 959 return status; 960 961 if (xdr_buf_subsegment(snd_buf, &integ_buf, 962 offset, snd_buf->len - offset)) 963 return status; 964 *integ_len = htonl(integ_buf.len); 965 966 /* guess whether we're in the head or the tail: */ 967 if (snd_buf->page_len || snd_buf->tail[0].iov_len) 968 iov = snd_buf->tail; 969 else 970 iov = snd_buf->head; 971 p = iov->iov_base + iov->iov_len; 972 mic.data = (u8 *)(p + 1); 973 974 maj_stat = gss_get_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 975 status = -EIO; /* XXX? */ 976 if (maj_stat == GSS_S_CONTEXT_EXPIRED) 977 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 978 else if (maj_stat) 979 return status; 980 q = xdr_encode_opaque(p, NULL, mic.len); 981 982 offset = (u8 *)q - (u8 *)p; 983 iov->iov_len += offset; 984 snd_buf->len += offset; 985 return 0; 986} 987 988static void 989priv_release_snd_buf(struct rpc_rqst *rqstp) 990{ 991 int i; 992 993 for (i=0; i < rqstp->rq_enc_pages_num; i++) 994 __free_page(rqstp->rq_enc_pages[i]); 995 kfree(rqstp->rq_enc_pages); 996} 997 998static int 999alloc_enc_pages(struct rpc_rqst *rqstp) 1000{ 1001 struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 1002 int first, last, i; 1003 1004 if (snd_buf->page_len == 0) { 1005 rqstp->rq_enc_pages_num = 0; 1006 return 0; 1007 } 1008 1009 first = snd_buf->page_base >> PAGE_CACHE_SHIFT; 1010 last = (snd_buf->page_base + snd_buf->page_len - 1) >> PAGE_CACHE_SHIFT; 1011 rqstp->rq_enc_pages_num = last - first + 1 + 1; 1012 rqstp->rq_enc_pages 1013 = kmalloc(rqstp->rq_enc_pages_num * sizeof(struct page *), 1014 GFP_NOFS); 1015 if (!rqstp->rq_enc_pages) 1016 goto out; 1017 for (i=0; i < rqstp->rq_enc_pages_num; i++) { 1018 rqstp->rq_enc_pages[i] = alloc_page(GFP_NOFS); 1019 if (rqstp->rq_enc_pages[i] == NULL) 1020 goto out_free; 1021 } 1022 rqstp->rq_release_snd_buf = priv_release_snd_buf; 1023 return 0; 1024out_free: 1025 for (i--; i >= 0; i--) { 1026 __free_page(rqstp->rq_enc_pages[i]); 1027 } 1028out: 1029 return -EAGAIN; 1030} 1031 1032static inline int 1033gss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1034 kxdrproc_t encode, struct rpc_rqst *rqstp, __be32 *p, void *obj) 1035{ 1036 struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 1037 u32 offset; 1038 u32 maj_stat; 1039 int status; 1040 __be32 *opaque_len; 1041 struct page **inpages; 1042 int first; 1043 int pad; 1044 struct kvec *iov; 1045 char *tmp; 1046 1047 opaque_len = p++; 1048 offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 1049 *p++ = htonl(rqstp->rq_seqno); 1050 1051 status = encode(rqstp, p, obj); 1052 if (status) 1053 return status; 1054 1055 status = alloc_enc_pages(rqstp); 1056 if (status) 1057 return status; 1058 first = snd_buf->page_base >> PAGE_CACHE_SHIFT; 1059 inpages = snd_buf->pages + first; 1060 snd_buf->pages = rqstp->rq_enc_pages; 1061 snd_buf->page_base -= first << PAGE_CACHE_SHIFT; 1062 /* Give the tail its own page, in case we need extra space in the 1063 * head when wrapping: */ 1064 if (snd_buf->page_len || snd_buf->tail[0].iov_len) { 1065 tmp = page_address(rqstp->rq_enc_pages[rqstp->rq_enc_pages_num - 1]); 1066 memcpy(tmp, snd_buf->tail[0].iov_base, snd_buf->tail[0].iov_len); 1067 snd_buf->tail[0].iov_base = tmp; 1068 } 1069 maj_stat = gss_wrap(ctx->gc_gss_ctx, offset, snd_buf, inpages); 1070 /* RPC_SLACK_SPACE should prevent this ever happening: */ 1071 BUG_ON(snd_buf->len > snd_buf->buflen); 1072 status = -EIO; 1073 /* We're assuming that when GSS_S_CONTEXT_EXPIRED, the encryption was 1074 * done anyway, so it's safe to put the request on the wire: */ 1075 if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1076 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 1077 else if (maj_stat) 1078 return status; 1079 1080 *opaque_len = htonl(snd_buf->len - offset); 1081 /* guess whether we're in the head or the tail: */ 1082 if (snd_buf->page_len || snd_buf->tail[0].iov_len) 1083 iov = snd_buf->tail; 1084 else 1085 iov = snd_buf->head; 1086 p = iov->iov_base + iov->iov_len; 1087 pad = 3 - ((snd_buf->len - offset - 1) & 3); 1088 memset(p, 0, pad); 1089 iov->iov_len += pad; 1090 snd_buf->len += pad; 1091 1092 return 0; 1093} 1094 1095static int 1096gss_wrap_req(struct rpc_task *task, 1097 kxdrproc_t encode, void *rqstp, __be32 *p, void *obj) 1098{ 1099 struct rpc_cred *cred = task->tk_msg.rpc_cred; 1100 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 1101 gc_base); 1102 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1103 int status = -EIO; 1104 1105 dprintk("RPC: %5u gss_wrap_req\n", task->tk_pid); 1106 if (ctx->gc_proc != RPC_GSS_PROC_DATA) { 1107 /* The spec seems a little ambiguous here, but I think that not 1108 * wrapping context destruction requests makes the most sense. 1109 */ 1110 status = encode(rqstp, p, obj); 1111 goto out; 1112 } 1113 switch (gss_cred->gc_service) { 1114 case RPC_GSS_SVC_NONE: 1115 status = encode(rqstp, p, obj); 1116 break; 1117 case RPC_GSS_SVC_INTEGRITY: 1118 status = gss_wrap_req_integ(cred, ctx, encode, 1119 rqstp, p, obj); 1120 break; 1121 case RPC_GSS_SVC_PRIVACY: 1122 status = gss_wrap_req_priv(cred, ctx, encode, 1123 rqstp, p, obj); 1124 break; 1125 } 1126out: 1127 gss_put_ctx(ctx); 1128 dprintk("RPC: %5u gss_wrap_req returning %d\n", task->tk_pid, status); 1129 return status; 1130} 1131 1132static inline int 1133gss_unwrap_resp_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1134 struct rpc_rqst *rqstp, __be32 **p) 1135{ 1136 struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 1137 struct xdr_buf integ_buf; 1138 struct xdr_netobj mic; 1139 u32 data_offset, mic_offset; 1140 u32 integ_len; 1141 u32 maj_stat; 1142 int status = -EIO; 1143 1144 integ_len = ntohl(*(*p)++); 1145 if (integ_len & 3) 1146 return status; 1147 data_offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 1148 mic_offset = integ_len + data_offset; 1149 if (mic_offset > rcv_buf->len) 1150 return status; 1151 if (ntohl(*(*p)++) != rqstp->rq_seqno) 1152 return status; 1153 1154 if (xdr_buf_subsegment(rcv_buf, &integ_buf, data_offset, 1155 mic_offset - data_offset)) 1156 return status; 1157 1158 if (xdr_buf_read_netobj(rcv_buf, &mic, mic_offset)) 1159 return status; 1160 1161 maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 1162 if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1163 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 1164 if (maj_stat != GSS_S_COMPLETE) 1165 return status; 1166 return 0; 1167} 1168 1169static inline int 1170gss_unwrap_resp_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1171 struct rpc_rqst *rqstp, __be32 **p) 1172{ 1173 struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 1174 u32 offset; 1175 u32 opaque_len; 1176 u32 maj_stat; 1177 int status = -EIO; 1178 1179 opaque_len = ntohl(*(*p)++); 1180 offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 1181 if (offset + opaque_len > rcv_buf->len) 1182 return status; 1183 /* remove padding: */ 1184 rcv_buf->len = offset + opaque_len; 1185 1186 maj_stat = gss_unwrap(ctx->gc_gss_ctx, offset, rcv_buf); 1187 if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1188 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 1189 if (maj_stat != GSS_S_COMPLETE) 1190 return status; 1191 if (ntohl(*(*p)++) != rqstp->rq_seqno) 1192 return status; 1193 1194 return 0; 1195} 1196 1197 1198static int 1199gss_unwrap_resp(struct rpc_task *task, 1200 kxdrproc_t decode, void *rqstp, __be32 *p, void *obj) 1201{ 1202 struct rpc_cred *cred = task->tk_msg.rpc_cred; 1203 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 1204 gc_base); 1205 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1206 __be32 *savedp = p; 1207 struct kvec *head = ((struct rpc_rqst *)rqstp)->rq_rcv_buf.head; 1208 int savedlen = head->iov_len; 1209 int status = -EIO; 1210 1211 if (ctx->gc_proc != RPC_GSS_PROC_DATA) 1212 goto out_decode; 1213 switch (gss_cred->gc_service) { 1214 case RPC_GSS_SVC_NONE: 1215 break; 1216 case RPC_GSS_SVC_INTEGRITY: 1217 status = gss_unwrap_resp_integ(cred, ctx, rqstp, &p); 1218 if (status) 1219 goto out; 1220 break; 1221 case RPC_GSS_SVC_PRIVACY: 1222 status = gss_unwrap_resp_priv(cred, ctx, rqstp, &p); 1223 if (status) 1224 goto out; 1225 break; 1226 } 1227 /* take into account extra slack for integrity and privacy cases: */ 1228 cred->cr_auth->au_rslack = cred->cr_auth->au_verfsize + (p - savedp) 1229 + (savedlen - head->iov_len); 1230out_decode: 1231 status = decode(rqstp, p, obj); 1232out: 1233 gss_put_ctx(ctx); 1234 dprintk("RPC: %5u gss_unwrap_resp returning %d\n", task->tk_pid, 1235 status); 1236 return status; 1237} 1238 1239static const struct rpc_authops authgss_ops = { 1240 .owner = THIS_MODULE, 1241 .au_flavor = RPC_AUTH_GSS, 1242#ifdef RPC_DEBUG 1243 .au_name = "RPCSEC_GSS", 1244#endif 1245 .create = gss_create, 1246 .destroy = gss_destroy, 1247 .lookup_cred = gss_lookup_cred, 1248 .crcreate = gss_create_cred 1249}; 1250 1251static const struct rpc_credops gss_credops = { 1252 .cr_name = "AUTH_GSS", 1253 .crdestroy = gss_destroy_cred, 1254 .cr_init = gss_cred_init, 1255 .crmatch = gss_match, 1256 .crmarshal = gss_marshal, 1257 .crrefresh = gss_refresh, 1258 .crvalidate = gss_validate, 1259 .crwrap_req = gss_wrap_req, 1260 .crunwrap_resp = gss_unwrap_resp, 1261}; 1262 1263static struct rpc_pipe_ops gss_upcall_ops = { 1264 .upcall = gss_pipe_upcall, 1265 .downcall = gss_pipe_downcall, 1266 .destroy_msg = gss_pipe_destroy_msg, 1267 .release_pipe = gss_pipe_release, 1268}; 1269 1270/* 1271 * Initialize RPCSEC_GSS module 1272 */ 1273static int __init init_rpcsec_gss(void) 1274{ 1275 int err = 0; 1276 1277 err = rpcauth_register(&authgss_ops); 1278 if (err) 1279 goto out; 1280 err = gss_svc_init(); 1281 if (err) 1282 goto out_unregister; 1283 return 0; 1284out_unregister: 1285 rpcauth_unregister(&authgss_ops); 1286out: 1287 return err; 1288} 1289 1290static void __exit exit_rpcsec_gss(void) 1291{ 1292 gss_svc_shutdown(); 1293 rpcauth_unregister(&authgss_ops); 1294} 1295 1296MODULE_LICENSE("GPL"); 1297module_init(init_rpcsec_gss) 1298module_exit(exit_rpcsec_gss) 1299