1 /* 2 * linux/net/sunrpc/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 57 static struct rpc_authops authgss_ops; 58 59 static 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_EXPIRE (60 * HZ) /* XXX: reasonable? */ 68 #define GSS_CRED_SLACK 1024 /* XXX: unused */ 69 /* length of a krb5 verifier (48), plus data added before arguments when 70 * using integrity (two 4-byte integers): */ 71 #define GSS_VERF_SLACK 56 72 73 /* XXX this define must match the gssd define 74 * as it is passed to gssd to signal the use of 75 * machine creds should be part of the shared rpc interface */ 76 77 #define CA_RUN_AS_MACHINE 0x00000200 78 79 /* dump the buffer in `emacs-hexl' style */ 80 #define isprint(c) ((c > 0x1f) && (c < 0x7f)) 81 82 static DEFINE_RWLOCK(gss_ctx_lock); 83 84 struct gss_auth { 85 struct rpc_auth rpc_auth; 86 struct gss_api_mech *mech; 87 enum rpc_gss_svc service; 88 struct list_head upcalls; 89 struct rpc_clnt *client; 90 struct dentry *dentry; 91 char path[48]; 92 spinlock_t lock; 93 }; 94 95 static void gss_destroy_ctx(struct gss_cl_ctx *); 96 static struct rpc_pipe_ops gss_upcall_ops; 97 98 void 99 print_hexl(u32 *p, u_int length, u_int offset) 100 { 101 u_int i, j, jm; 102 u8 c, *cp; 103 104 dprintk("RPC: print_hexl: length %d\n",length); 105 dprintk("\n"); 106 cp = (u8 *) p; 107 108 for (i = 0; i < length; i += 0x10) { 109 dprintk(" %04x: ", (u_int)(i + offset)); 110 jm = length - i; 111 jm = jm > 16 ? 16 : jm; 112 113 for (j = 0; j < jm; j++) { 114 if ((j % 2) == 1) 115 dprintk("%02x ", (u_int)cp[i+j]); 116 else 117 dprintk("%02x", (u_int)cp[i+j]); 118 } 119 for (; j < 16; j++) { 120 if ((j % 2) == 1) 121 dprintk(" "); 122 else 123 dprintk(" "); 124 } 125 dprintk(" "); 126 127 for (j = 0; j < jm; j++) { 128 c = cp[i+j]; 129 c = isprint(c) ? c : '.'; 130 dprintk("%c", c); 131 } 132 dprintk("\n"); 133 } 134 } 135 136 EXPORT_SYMBOL(print_hexl); 137 138 static inline struct gss_cl_ctx * 139 gss_get_ctx(struct gss_cl_ctx *ctx) 140 { 141 atomic_inc(&ctx->count); 142 return ctx; 143 } 144 145 static inline void 146 gss_put_ctx(struct gss_cl_ctx *ctx) 147 { 148 if (atomic_dec_and_test(&ctx->count)) 149 gss_destroy_ctx(ctx); 150 } 151 152 static void 153 gss_cred_set_ctx(struct rpc_cred *cred, struct gss_cl_ctx *ctx) 154 { 155 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 156 struct gss_cl_ctx *old; 157 write_lock(&gss_ctx_lock); 158 old = gss_cred->gc_ctx; 159 gss_cred->gc_ctx = ctx; 160 cred->cr_flags |= RPCAUTH_CRED_UPTODATE; 161 write_unlock(&gss_ctx_lock); 162 if (old) 163 gss_put_ctx(old); 164 } 165 166 static int 167 gss_cred_is_uptodate_ctx(struct rpc_cred *cred) 168 { 169 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 170 int res = 0; 171 172 read_lock(&gss_ctx_lock); 173 if ((cred->cr_flags & RPCAUTH_CRED_UPTODATE) && gss_cred->gc_ctx) 174 res = 1; 175 read_unlock(&gss_ctx_lock); 176 return res; 177 } 178 179 static const void * 180 simple_get_bytes(const void *p, const void *end, void *res, size_t len) 181 { 182 const void *q = (const void *)((const char *)p + len); 183 if (unlikely(q > end || q < p)) 184 return ERR_PTR(-EFAULT); 185 memcpy(res, p, len); 186 return q; 187 } 188 189 static inline const void * 190 simple_get_netobj(const void *p, const void *end, struct xdr_netobj *dest) 191 { 192 const void *q; 193 unsigned int len; 194 195 p = simple_get_bytes(p, end, &len, sizeof(len)); 196 if (IS_ERR(p)) 197 return p; 198 q = (const void *)((const char *)p + len); 199 if (unlikely(q > end || q < p)) 200 return ERR_PTR(-EFAULT); 201 dest->data = kmalloc(len, GFP_KERNEL); 202 if (unlikely(dest->data == NULL)) 203 return ERR_PTR(-ENOMEM); 204 dest->len = len; 205 memcpy(dest->data, p, len); 206 return q; 207 } 208 209 static struct gss_cl_ctx * 210 gss_cred_get_ctx(struct rpc_cred *cred) 211 { 212 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 213 struct gss_cl_ctx *ctx = NULL; 214 215 read_lock(&gss_ctx_lock); 216 if (gss_cred->gc_ctx) 217 ctx = gss_get_ctx(gss_cred->gc_ctx); 218 read_unlock(&gss_ctx_lock); 219 return ctx; 220 } 221 222 static struct gss_cl_ctx * 223 gss_alloc_context(void) 224 { 225 struct gss_cl_ctx *ctx; 226 227 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); 228 if (ctx != NULL) { 229 memset(ctx, 0, sizeof(*ctx)); 230 ctx->gc_proc = RPC_GSS_PROC_DATA; 231 ctx->gc_seq = 1; /* NetApp 6.4R1 doesn't accept seq. no. 0 */ 232 spin_lock_init(&ctx->gc_seq_lock); 233 atomic_set(&ctx->count,1); 234 } 235 return ctx; 236 } 237 238 #define GSSD_MIN_TIMEOUT (60 * 60) 239 static const void * 240 gss_fill_context(const void *p, const void *end, struct gss_cl_ctx *ctx, struct gss_api_mech *gm) 241 { 242 const void *q; 243 unsigned int seclen; 244 unsigned int timeout; 245 u32 window_size; 246 int ret; 247 248 /* First unsigned int gives the lifetime (in seconds) of the cred */ 249 p = simple_get_bytes(p, end, &timeout, sizeof(timeout)); 250 if (IS_ERR(p)) 251 goto err; 252 if (timeout == 0) 253 timeout = GSSD_MIN_TIMEOUT; 254 ctx->gc_expiry = jiffies + (unsigned long)timeout * HZ * 3 / 4; 255 /* Sequence number window. Determines the maximum number of simultaneous requests */ 256 p = simple_get_bytes(p, end, &window_size, sizeof(window_size)); 257 if (IS_ERR(p)) 258 goto err; 259 ctx->gc_win = window_size; 260 /* gssd signals an error by passing ctx->gc_win = 0: */ 261 if (ctx->gc_win == 0) { 262 /* in which case, p points to an error code which we ignore */ 263 p = ERR_PTR(-EACCES); 264 goto err; 265 } 266 /* copy the opaque wire context */ 267 p = simple_get_netobj(p, end, &ctx->gc_wire_ctx); 268 if (IS_ERR(p)) 269 goto err; 270 /* import the opaque security context */ 271 p = simple_get_bytes(p, end, &seclen, sizeof(seclen)); 272 if (IS_ERR(p)) 273 goto err; 274 q = (const void *)((const char *)p + seclen); 275 if (unlikely(q > end || q < p)) { 276 p = ERR_PTR(-EFAULT); 277 goto err; 278 } 279 ret = gss_import_sec_context(p, seclen, gm, &ctx->gc_gss_ctx); 280 if (ret < 0) { 281 p = ERR_PTR(ret); 282 goto err; 283 } 284 return q; 285 err: 286 dprintk("RPC: gss_fill_context returning %ld\n", -PTR_ERR(p)); 287 return p; 288 } 289 290 291 struct gss_upcall_msg { 292 atomic_t count; 293 uid_t uid; 294 struct rpc_pipe_msg msg; 295 struct list_head list; 296 struct gss_auth *auth; 297 struct rpc_wait_queue rpc_waitqueue; 298 wait_queue_head_t waitqueue; 299 struct gss_cl_ctx *ctx; 300 }; 301 302 static void 303 gss_release_msg(struct gss_upcall_msg *gss_msg) 304 { 305 if (!atomic_dec_and_test(&gss_msg->count)) 306 return; 307 BUG_ON(!list_empty(&gss_msg->list)); 308 if (gss_msg->ctx != NULL) 309 gss_put_ctx(gss_msg->ctx); 310 kfree(gss_msg); 311 } 312 313 static struct gss_upcall_msg * 314 __gss_find_upcall(struct gss_auth *gss_auth, uid_t uid) 315 { 316 struct gss_upcall_msg *pos; 317 list_for_each_entry(pos, &gss_auth->upcalls, list) { 318 if (pos->uid != uid) 319 continue; 320 atomic_inc(&pos->count); 321 dprintk("RPC: gss_find_upcall found msg %p\n", pos); 322 return pos; 323 } 324 dprintk("RPC: gss_find_upcall found nothing\n"); 325 return NULL; 326 } 327 328 /* Try to add a upcall to the pipefs queue. 329 * If an upcall owned by our uid already exists, then we return a reference 330 * to that upcall instead of adding the new upcall. 331 */ 332 static inline struct gss_upcall_msg * 333 gss_add_msg(struct gss_auth *gss_auth, struct gss_upcall_msg *gss_msg) 334 { 335 struct gss_upcall_msg *old; 336 337 spin_lock(&gss_auth->lock); 338 old = __gss_find_upcall(gss_auth, gss_msg->uid); 339 if (old == NULL) { 340 atomic_inc(&gss_msg->count); 341 list_add(&gss_msg->list, &gss_auth->upcalls); 342 } else 343 gss_msg = old; 344 spin_unlock(&gss_auth->lock); 345 return gss_msg; 346 } 347 348 static void 349 __gss_unhash_msg(struct gss_upcall_msg *gss_msg) 350 { 351 if (list_empty(&gss_msg->list)) 352 return; 353 list_del_init(&gss_msg->list); 354 rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 355 wake_up_all(&gss_msg->waitqueue); 356 atomic_dec(&gss_msg->count); 357 } 358 359 static void 360 gss_unhash_msg(struct gss_upcall_msg *gss_msg) 361 { 362 struct gss_auth *gss_auth = gss_msg->auth; 363 364 spin_lock(&gss_auth->lock); 365 __gss_unhash_msg(gss_msg); 366 spin_unlock(&gss_auth->lock); 367 } 368 369 static void 370 gss_upcall_callback(struct rpc_task *task) 371 { 372 struct gss_cred *gss_cred = container_of(task->tk_msg.rpc_cred, 373 struct gss_cred, gc_base); 374 struct gss_upcall_msg *gss_msg = gss_cred->gc_upcall; 375 376 BUG_ON(gss_msg == NULL); 377 if (gss_msg->ctx) 378 gss_cred_set_ctx(task->tk_msg.rpc_cred, gss_get_ctx(gss_msg->ctx)); 379 else 380 task->tk_status = gss_msg->msg.errno; 381 spin_lock(&gss_msg->auth->lock); 382 gss_cred->gc_upcall = NULL; 383 rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 384 spin_unlock(&gss_msg->auth->lock); 385 gss_release_msg(gss_msg); 386 } 387 388 static inline struct gss_upcall_msg * 389 gss_alloc_msg(struct gss_auth *gss_auth, uid_t uid) 390 { 391 struct gss_upcall_msg *gss_msg; 392 393 gss_msg = kmalloc(sizeof(*gss_msg), GFP_KERNEL); 394 if (gss_msg != NULL) { 395 memset(gss_msg, 0, sizeof(*gss_msg)); 396 INIT_LIST_HEAD(&gss_msg->list); 397 rpc_init_wait_queue(&gss_msg->rpc_waitqueue, "RPCSEC_GSS upcall waitq"); 398 init_waitqueue_head(&gss_msg->waitqueue); 399 atomic_set(&gss_msg->count, 1); 400 gss_msg->msg.data = &gss_msg->uid; 401 gss_msg->msg.len = sizeof(gss_msg->uid); 402 gss_msg->uid = uid; 403 gss_msg->auth = gss_auth; 404 } 405 return gss_msg; 406 } 407 408 static struct gss_upcall_msg * 409 gss_setup_upcall(struct rpc_clnt *clnt, struct gss_auth *gss_auth, struct rpc_cred *cred) 410 { 411 struct gss_upcall_msg *gss_new, *gss_msg; 412 413 gss_new = gss_alloc_msg(gss_auth, cred->cr_uid); 414 if (gss_new == NULL) 415 return ERR_PTR(-ENOMEM); 416 gss_msg = gss_add_msg(gss_auth, gss_new); 417 if (gss_msg == gss_new) { 418 int res = rpc_queue_upcall(gss_auth->dentry->d_inode, &gss_new->msg); 419 if (res) { 420 gss_unhash_msg(gss_new); 421 gss_msg = ERR_PTR(res); 422 } 423 } else 424 gss_release_msg(gss_new); 425 return gss_msg; 426 } 427 428 static inline int 429 gss_refresh_upcall(struct rpc_task *task) 430 { 431 struct rpc_cred *cred = task->tk_msg.rpc_cred; 432 struct gss_auth *gss_auth = container_of(task->tk_client->cl_auth, 433 struct gss_auth, rpc_auth); 434 struct gss_cred *gss_cred = container_of(cred, 435 struct gss_cred, gc_base); 436 struct gss_upcall_msg *gss_msg; 437 int err = 0; 438 439 dprintk("RPC: %4u gss_refresh_upcall for uid %u\n", task->tk_pid, cred->cr_uid); 440 gss_msg = gss_setup_upcall(task->tk_client, gss_auth, cred); 441 if (IS_ERR(gss_msg)) { 442 err = PTR_ERR(gss_msg); 443 goto out; 444 } 445 spin_lock(&gss_auth->lock); 446 if (gss_cred->gc_upcall != NULL) 447 rpc_sleep_on(&gss_cred->gc_upcall->rpc_waitqueue, task, NULL, NULL); 448 else if (gss_msg->ctx == NULL && gss_msg->msg.errno >= 0) { 449 task->tk_timeout = 0; 450 gss_cred->gc_upcall = gss_msg; 451 /* gss_upcall_callback will release the reference to gss_upcall_msg */ 452 atomic_inc(&gss_msg->count); 453 rpc_sleep_on(&gss_msg->rpc_waitqueue, task, gss_upcall_callback, NULL); 454 } else 455 err = gss_msg->msg.errno; 456 spin_unlock(&gss_auth->lock); 457 gss_release_msg(gss_msg); 458 out: 459 dprintk("RPC: %4u gss_refresh_upcall for uid %u result %d\n", task->tk_pid, 460 cred->cr_uid, err); 461 return err; 462 } 463 464 static inline int 465 gss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred) 466 { 467 struct rpc_cred *cred = &gss_cred->gc_base; 468 struct gss_upcall_msg *gss_msg; 469 DEFINE_WAIT(wait); 470 int err = 0; 471 472 dprintk("RPC: gss_upcall for uid %u\n", cred->cr_uid); 473 gss_msg = gss_setup_upcall(gss_auth->client, gss_auth, cred); 474 if (IS_ERR(gss_msg)) { 475 err = PTR_ERR(gss_msg); 476 goto out; 477 } 478 for (;;) { 479 prepare_to_wait(&gss_msg->waitqueue, &wait, TASK_INTERRUPTIBLE); 480 spin_lock(&gss_auth->lock); 481 if (gss_msg->ctx != NULL || gss_msg->msg.errno < 0) { 482 spin_unlock(&gss_auth->lock); 483 break; 484 } 485 spin_unlock(&gss_auth->lock); 486 if (signalled()) { 487 err = -ERESTARTSYS; 488 goto out_intr; 489 } 490 schedule(); 491 } 492 if (gss_msg->ctx) 493 gss_cred_set_ctx(cred, gss_get_ctx(gss_msg->ctx)); 494 else 495 err = gss_msg->msg.errno; 496 out_intr: 497 finish_wait(&gss_msg->waitqueue, &wait); 498 gss_release_msg(gss_msg); 499 out: 500 dprintk("RPC: gss_create_upcall for uid %u result %d\n", cred->cr_uid, err); 501 return err; 502 } 503 504 static ssize_t 505 gss_pipe_upcall(struct file *filp, struct rpc_pipe_msg *msg, 506 char __user *dst, size_t buflen) 507 { 508 char *data = (char *)msg->data + msg->copied; 509 ssize_t mlen = msg->len; 510 ssize_t left; 511 512 if (mlen > buflen) 513 mlen = buflen; 514 left = copy_to_user(dst, data, mlen); 515 if (left < 0) { 516 msg->errno = left; 517 return left; 518 } 519 mlen -= left; 520 msg->copied += mlen; 521 msg->errno = 0; 522 return mlen; 523 } 524 525 #define MSG_BUF_MAXSIZE 1024 526 527 static ssize_t 528 gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen) 529 { 530 const void *p, *end; 531 void *buf; 532 struct rpc_clnt *clnt; 533 struct gss_auth *gss_auth; 534 struct rpc_cred *cred; 535 struct gss_upcall_msg *gss_msg; 536 struct gss_cl_ctx *ctx; 537 uid_t uid; 538 int err = -EFBIG; 539 540 if (mlen > MSG_BUF_MAXSIZE) 541 goto out; 542 err = -ENOMEM; 543 buf = kmalloc(mlen, GFP_KERNEL); 544 if (!buf) 545 goto out; 546 547 clnt = RPC_I(filp->f_dentry->d_inode)->private; 548 err = -EFAULT; 549 if (copy_from_user(buf, src, mlen)) 550 goto err; 551 552 end = (const void *)((char *)buf + mlen); 553 p = simple_get_bytes(buf, end, &uid, sizeof(uid)); 554 if (IS_ERR(p)) { 555 err = PTR_ERR(p); 556 goto err; 557 } 558 559 err = -ENOMEM; 560 ctx = gss_alloc_context(); 561 if (ctx == NULL) 562 goto err; 563 err = 0; 564 gss_auth = container_of(clnt->cl_auth, struct gss_auth, rpc_auth); 565 p = gss_fill_context(p, end, ctx, gss_auth->mech); 566 if (IS_ERR(p)) { 567 err = PTR_ERR(p); 568 if (err != -EACCES) 569 goto err_put_ctx; 570 } 571 spin_lock(&gss_auth->lock); 572 gss_msg = __gss_find_upcall(gss_auth, uid); 573 if (gss_msg) { 574 if (err == 0 && gss_msg->ctx == NULL) 575 gss_msg->ctx = gss_get_ctx(ctx); 576 gss_msg->msg.errno = err; 577 __gss_unhash_msg(gss_msg); 578 spin_unlock(&gss_auth->lock); 579 gss_release_msg(gss_msg); 580 } else { 581 struct auth_cred acred = { .uid = uid }; 582 spin_unlock(&gss_auth->lock); 583 cred = rpcauth_lookup_credcache(clnt->cl_auth, &acred, 0); 584 if (IS_ERR(cred)) { 585 err = PTR_ERR(cred); 586 goto err_put_ctx; 587 } 588 gss_cred_set_ctx(cred, gss_get_ctx(ctx)); 589 } 590 gss_put_ctx(ctx); 591 kfree(buf); 592 dprintk("RPC: gss_pipe_downcall returning length %Zu\n", mlen); 593 return mlen; 594 err_put_ctx: 595 gss_put_ctx(ctx); 596 err: 597 kfree(buf); 598 out: 599 dprintk("RPC: gss_pipe_downcall returning %d\n", err); 600 return err; 601 } 602 603 static void 604 gss_pipe_release(struct inode *inode) 605 { 606 struct rpc_inode *rpci = RPC_I(inode); 607 struct rpc_clnt *clnt; 608 struct rpc_auth *auth; 609 struct gss_auth *gss_auth; 610 611 clnt = rpci->private; 612 auth = clnt->cl_auth; 613 gss_auth = container_of(auth, struct gss_auth, rpc_auth); 614 spin_lock(&gss_auth->lock); 615 while (!list_empty(&gss_auth->upcalls)) { 616 struct gss_upcall_msg *gss_msg; 617 618 gss_msg = list_entry(gss_auth->upcalls.next, 619 struct gss_upcall_msg, list); 620 gss_msg->msg.errno = -EPIPE; 621 atomic_inc(&gss_msg->count); 622 __gss_unhash_msg(gss_msg); 623 spin_unlock(&gss_auth->lock); 624 gss_release_msg(gss_msg); 625 spin_lock(&gss_auth->lock); 626 } 627 spin_unlock(&gss_auth->lock); 628 } 629 630 static void 631 gss_pipe_destroy_msg(struct rpc_pipe_msg *msg) 632 { 633 struct gss_upcall_msg *gss_msg = container_of(msg, struct gss_upcall_msg, msg); 634 static unsigned long ratelimit; 635 636 if (msg->errno < 0) { 637 dprintk("RPC: gss_pipe_destroy_msg releasing msg %p\n", 638 gss_msg); 639 atomic_inc(&gss_msg->count); 640 gss_unhash_msg(gss_msg); 641 if (msg->errno == -ETIMEDOUT || msg->errno == -EPIPE) { 642 unsigned long now = jiffies; 643 if (time_after(now, ratelimit)) { 644 printk(KERN_WARNING "RPC: AUTH_GSS upcall timed out.\n" 645 "Please check user daemon is running!\n"); 646 ratelimit = now + 15*HZ; 647 } 648 } 649 gss_release_msg(gss_msg); 650 } 651 } 652 653 /* 654 * NOTE: we have the opportunity to use different 655 * parameters based on the input flavor (which must be a pseudoflavor) 656 */ 657 static struct rpc_auth * 658 gss_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor) 659 { 660 struct gss_auth *gss_auth; 661 struct rpc_auth * auth; 662 int err = -ENOMEM; /* XXX? */ 663 664 dprintk("RPC: creating GSS authenticator for client %p\n",clnt); 665 666 if (!try_module_get(THIS_MODULE)) 667 return ERR_PTR(err); 668 if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL))) 669 goto out_dec; 670 gss_auth->client = clnt; 671 err = -EINVAL; 672 gss_auth->mech = gss_mech_get_by_pseudoflavor(flavor); 673 if (!gss_auth->mech) { 674 printk(KERN_WARNING "%s: Pseudoflavor %d not found!", 675 __FUNCTION__, flavor); 676 goto err_free; 677 } 678 gss_auth->service = gss_pseudoflavor_to_service(gss_auth->mech, flavor); 679 if (gss_auth->service == 0) 680 goto err_put_mech; 681 INIT_LIST_HEAD(&gss_auth->upcalls); 682 spin_lock_init(&gss_auth->lock); 683 auth = &gss_auth->rpc_auth; 684 auth->au_cslack = GSS_CRED_SLACK >> 2; 685 auth->au_rslack = GSS_VERF_SLACK >> 2; 686 auth->au_ops = &authgss_ops; 687 auth->au_flavor = flavor; 688 atomic_set(&auth->au_count, 1); 689 690 err = rpcauth_init_credcache(auth, GSS_CRED_EXPIRE); 691 if (err) 692 goto err_put_mech; 693 694 snprintf(gss_auth->path, sizeof(gss_auth->path), "%s/%s", 695 clnt->cl_pathname, 696 gss_auth->mech->gm_name); 697 gss_auth->dentry = rpc_mkpipe(gss_auth->path, clnt, &gss_upcall_ops, RPC_PIPE_WAIT_FOR_OPEN); 698 if (IS_ERR(gss_auth->dentry)) { 699 err = PTR_ERR(gss_auth->dentry); 700 goto err_put_mech; 701 } 702 703 return auth; 704 err_put_mech: 705 gss_mech_put(gss_auth->mech); 706 err_free: 707 kfree(gss_auth); 708 out_dec: 709 module_put(THIS_MODULE); 710 return ERR_PTR(err); 711 } 712 713 static void 714 gss_destroy(struct rpc_auth *auth) 715 { 716 struct gss_auth *gss_auth; 717 718 dprintk("RPC: destroying GSS authenticator %p flavor %d\n", 719 auth, auth->au_flavor); 720 721 gss_auth = container_of(auth, struct gss_auth, rpc_auth); 722 rpc_unlink(gss_auth->path); 723 gss_mech_put(gss_auth->mech); 724 725 rpcauth_free_credcache(auth); 726 kfree(gss_auth); 727 module_put(THIS_MODULE); 728 } 729 730 /* gss_destroy_cred (and gss_destroy_ctx) are used to clean up after failure 731 * to create a new cred or context, so they check that things have been 732 * allocated before freeing them. */ 733 static void 734 gss_destroy_ctx(struct gss_cl_ctx *ctx) 735 { 736 dprintk("RPC: gss_destroy_ctx\n"); 737 738 if (ctx->gc_gss_ctx) 739 gss_delete_sec_context(&ctx->gc_gss_ctx); 740 741 kfree(ctx->gc_wire_ctx.data); 742 kfree(ctx); 743 } 744 745 static void 746 gss_destroy_cred(struct rpc_cred *rc) 747 { 748 struct gss_cred *cred = container_of(rc, struct gss_cred, gc_base); 749 750 dprintk("RPC: gss_destroy_cred \n"); 751 752 if (cred->gc_ctx) 753 gss_put_ctx(cred->gc_ctx); 754 kfree(cred); 755 } 756 757 /* 758 * Lookup RPCSEC_GSS cred for the current process 759 */ 760 static struct rpc_cred * 761 gss_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int taskflags) 762 { 763 return rpcauth_lookup_credcache(auth, acred, taskflags); 764 } 765 766 static struct rpc_cred * 767 gss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int taskflags) 768 { 769 struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 770 struct gss_cred *cred = NULL; 771 int err = -ENOMEM; 772 773 dprintk("RPC: gss_create_cred for uid %d, flavor %d\n", 774 acred->uid, auth->au_flavor); 775 776 if (!(cred = kmalloc(sizeof(*cred), GFP_KERNEL))) 777 goto out_err; 778 779 memset(cred, 0, sizeof(*cred)); 780 atomic_set(&cred->gc_count, 1); 781 cred->gc_uid = acred->uid; 782 /* 783 * Note: in order to force a call to call_refresh(), we deliberately 784 * fail to flag the credential as RPCAUTH_CRED_UPTODATE. 785 */ 786 cred->gc_flags = 0; 787 cred->gc_base.cr_ops = &gss_credops; 788 cred->gc_service = gss_auth->service; 789 err = gss_create_upcall(gss_auth, cred); 790 if (err < 0) 791 goto out_err; 792 793 return &cred->gc_base; 794 795 out_err: 796 dprintk("RPC: gss_create_cred failed with error %d\n", err); 797 if (cred) gss_destroy_cred(&cred->gc_base); 798 return ERR_PTR(err); 799 } 800 801 static int 802 gss_match(struct auth_cred *acred, struct rpc_cred *rc, int taskflags) 803 { 804 struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base); 805 806 /* Don't match with creds that have expired. */ 807 if (gss_cred->gc_ctx && time_after(jiffies, gss_cred->gc_ctx->gc_expiry)) 808 return 0; 809 return (rc->cr_uid == acred->uid); 810 } 811 812 /* 813 * Marshal credentials. 814 * Maybe we should keep a cached credential for performance reasons. 815 */ 816 static u32 * 817 gss_marshal(struct rpc_task *task, u32 *p) 818 { 819 struct rpc_cred *cred = task->tk_msg.rpc_cred; 820 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 821 gc_base); 822 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 823 u32 *cred_len; 824 struct rpc_rqst *req = task->tk_rqstp; 825 u32 maj_stat = 0; 826 struct xdr_netobj mic; 827 struct kvec iov; 828 struct xdr_buf verf_buf; 829 830 dprintk("RPC: %4u gss_marshal\n", task->tk_pid); 831 832 *p++ = htonl(RPC_AUTH_GSS); 833 cred_len = p++; 834 835 spin_lock(&ctx->gc_seq_lock); 836 req->rq_seqno = ctx->gc_seq++; 837 spin_unlock(&ctx->gc_seq_lock); 838 839 *p++ = htonl((u32) RPC_GSS_VERSION); 840 *p++ = htonl((u32) ctx->gc_proc); 841 *p++ = htonl((u32) req->rq_seqno); 842 *p++ = htonl((u32) gss_cred->gc_service); 843 p = xdr_encode_netobj(p, &ctx->gc_wire_ctx); 844 *cred_len = htonl((p - (cred_len + 1)) << 2); 845 846 /* We compute the checksum for the verifier over the xdr-encoded bytes 847 * starting with the xid and ending at the end of the credential: */ 848 iov.iov_base = xprt_skip_transport_header(task->tk_xprt, 849 req->rq_snd_buf.head[0].iov_base); 850 iov.iov_len = (u8 *)p - (u8 *)iov.iov_base; 851 xdr_buf_from_iov(&iov, &verf_buf); 852 853 /* set verifier flavor*/ 854 *p++ = htonl(RPC_AUTH_GSS); 855 856 mic.data = (u8 *)(p + 1); 857 maj_stat = gss_get_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 858 if (maj_stat == GSS_S_CONTEXT_EXPIRED) { 859 cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE; 860 } else if (maj_stat != 0) { 861 printk("gss_marshal: gss_get_mic FAILED (%d)\n", maj_stat); 862 goto out_put_ctx; 863 } 864 p = xdr_encode_opaque(p, NULL, mic.len); 865 gss_put_ctx(ctx); 866 return p; 867 out_put_ctx: 868 gss_put_ctx(ctx); 869 return NULL; 870 } 871 872 /* 873 * Refresh credentials. XXX - finish 874 */ 875 static int 876 gss_refresh(struct rpc_task *task) 877 { 878 879 if (!gss_cred_is_uptodate_ctx(task->tk_msg.rpc_cred)) 880 return gss_refresh_upcall(task); 881 return 0; 882 } 883 884 static u32 * 885 gss_validate(struct rpc_task *task, u32 *p) 886 { 887 struct rpc_cred *cred = task->tk_msg.rpc_cred; 888 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 889 u32 seq; 890 struct kvec iov; 891 struct xdr_buf verf_buf; 892 struct xdr_netobj mic; 893 u32 flav,len; 894 u32 maj_stat; 895 896 dprintk("RPC: %4u gss_validate\n", task->tk_pid); 897 898 flav = ntohl(*p++); 899 if ((len = ntohl(*p++)) > RPC_MAX_AUTH_SIZE) 900 goto out_bad; 901 if (flav != RPC_AUTH_GSS) 902 goto out_bad; 903 seq = htonl(task->tk_rqstp->rq_seqno); 904 iov.iov_base = &seq; 905 iov.iov_len = sizeof(seq); 906 xdr_buf_from_iov(&iov, &verf_buf); 907 mic.data = (u8 *)p; 908 mic.len = len; 909 910 maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 911 if (maj_stat == GSS_S_CONTEXT_EXPIRED) 912 cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE; 913 if (maj_stat) 914 goto out_bad; 915 /* We leave it to unwrap to calculate au_rslack. For now we just 916 * calculate the length of the verifier: */ 917 task->tk_auth->au_verfsize = XDR_QUADLEN(len) + 2; 918 gss_put_ctx(ctx); 919 dprintk("RPC: %4u GSS gss_validate: gss_verify_mic succeeded.\n", 920 task->tk_pid); 921 return p + XDR_QUADLEN(len); 922 out_bad: 923 gss_put_ctx(ctx); 924 dprintk("RPC: %4u gss_validate failed.\n", task->tk_pid); 925 return NULL; 926 } 927 928 static inline int 929 gss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 930 kxdrproc_t encode, struct rpc_rqst *rqstp, u32 *p, void *obj) 931 { 932 struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 933 struct xdr_buf integ_buf; 934 u32 *integ_len = NULL; 935 struct xdr_netobj mic; 936 u32 offset, *q; 937 struct kvec *iov; 938 u32 maj_stat = 0; 939 int status = -EIO; 940 941 integ_len = p++; 942 offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 943 *p++ = htonl(rqstp->rq_seqno); 944 945 status = encode(rqstp, p, obj); 946 if (status) 947 return status; 948 949 if (xdr_buf_subsegment(snd_buf, &integ_buf, 950 offset, snd_buf->len - offset)) 951 return status; 952 *integ_len = htonl(integ_buf.len); 953 954 /* guess whether we're in the head or the tail: */ 955 if (snd_buf->page_len || snd_buf->tail[0].iov_len) 956 iov = snd_buf->tail; 957 else 958 iov = snd_buf->head; 959 p = iov->iov_base + iov->iov_len; 960 mic.data = (u8 *)(p + 1); 961 962 maj_stat = gss_get_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 963 status = -EIO; /* XXX? */ 964 if (maj_stat == GSS_S_CONTEXT_EXPIRED) 965 cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE; 966 else if (maj_stat) 967 return status; 968 q = xdr_encode_opaque(p, NULL, mic.len); 969 970 offset = (u8 *)q - (u8 *)p; 971 iov->iov_len += offset; 972 snd_buf->len += offset; 973 return 0; 974 } 975 976 static void 977 priv_release_snd_buf(struct rpc_rqst *rqstp) 978 { 979 int i; 980 981 for (i=0; i < rqstp->rq_enc_pages_num; i++) 982 __free_page(rqstp->rq_enc_pages[i]); 983 kfree(rqstp->rq_enc_pages); 984 } 985 986 static int 987 alloc_enc_pages(struct rpc_rqst *rqstp) 988 { 989 struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 990 int first, last, i; 991 992 if (snd_buf->page_len == 0) { 993 rqstp->rq_enc_pages_num = 0; 994 return 0; 995 } 996 997 first = snd_buf->page_base >> PAGE_CACHE_SHIFT; 998 last = (snd_buf->page_base + snd_buf->page_len - 1) >> PAGE_CACHE_SHIFT; 999 rqstp->rq_enc_pages_num = last - first + 1 + 1; 1000 rqstp->rq_enc_pages 1001 = kmalloc(rqstp->rq_enc_pages_num * sizeof(struct page *), 1002 GFP_NOFS); 1003 if (!rqstp->rq_enc_pages) 1004 goto out; 1005 for (i=0; i < rqstp->rq_enc_pages_num; i++) { 1006 rqstp->rq_enc_pages[i] = alloc_page(GFP_NOFS); 1007 if (rqstp->rq_enc_pages[i] == NULL) 1008 goto out_free; 1009 } 1010 rqstp->rq_release_snd_buf = priv_release_snd_buf; 1011 return 0; 1012 out_free: 1013 for (i--; i >= 0; i--) { 1014 __free_page(rqstp->rq_enc_pages[i]); 1015 } 1016 out: 1017 return -EAGAIN; 1018 } 1019 1020 static inline int 1021 gss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1022 kxdrproc_t encode, struct rpc_rqst *rqstp, u32 *p, void *obj) 1023 { 1024 struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 1025 u32 offset; 1026 u32 maj_stat; 1027 int status; 1028 u32 *opaque_len; 1029 struct page **inpages; 1030 int first; 1031 int pad; 1032 struct kvec *iov; 1033 char *tmp; 1034 1035 opaque_len = p++; 1036 offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 1037 *p++ = htonl(rqstp->rq_seqno); 1038 1039 status = encode(rqstp, p, obj); 1040 if (status) 1041 return status; 1042 1043 status = alloc_enc_pages(rqstp); 1044 if (status) 1045 return status; 1046 first = snd_buf->page_base >> PAGE_CACHE_SHIFT; 1047 inpages = snd_buf->pages + first; 1048 snd_buf->pages = rqstp->rq_enc_pages; 1049 snd_buf->page_base -= first << PAGE_CACHE_SHIFT; 1050 /* Give the tail its own page, in case we need extra space in the 1051 * head when wrapping: */ 1052 if (snd_buf->page_len || snd_buf->tail[0].iov_len) { 1053 tmp = page_address(rqstp->rq_enc_pages[rqstp->rq_enc_pages_num - 1]); 1054 memcpy(tmp, snd_buf->tail[0].iov_base, snd_buf->tail[0].iov_len); 1055 snd_buf->tail[0].iov_base = tmp; 1056 } 1057 maj_stat = gss_wrap(ctx->gc_gss_ctx, offset, snd_buf, inpages); 1058 /* RPC_SLACK_SPACE should prevent this ever happening: */ 1059 BUG_ON(snd_buf->len > snd_buf->buflen); 1060 status = -EIO; 1061 /* We're assuming that when GSS_S_CONTEXT_EXPIRED, the encryption was 1062 * done anyway, so it's safe to put the request on the wire: */ 1063 if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1064 cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE; 1065 else if (maj_stat) 1066 return status; 1067 1068 *opaque_len = htonl(snd_buf->len - offset); 1069 /* guess whether we're in the head or the tail: */ 1070 if (snd_buf->page_len || snd_buf->tail[0].iov_len) 1071 iov = snd_buf->tail; 1072 else 1073 iov = snd_buf->head; 1074 p = iov->iov_base + iov->iov_len; 1075 pad = 3 - ((snd_buf->len - offset - 1) & 3); 1076 memset(p, 0, pad); 1077 iov->iov_len += pad; 1078 snd_buf->len += pad; 1079 1080 return 0; 1081 } 1082 1083 static int 1084 gss_wrap_req(struct rpc_task *task, 1085 kxdrproc_t encode, void *rqstp, u32 *p, void *obj) 1086 { 1087 struct rpc_cred *cred = task->tk_msg.rpc_cred; 1088 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 1089 gc_base); 1090 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1091 int status = -EIO; 1092 1093 dprintk("RPC: %4u gss_wrap_req\n", task->tk_pid); 1094 if (ctx->gc_proc != RPC_GSS_PROC_DATA) { 1095 /* The spec seems a little ambiguous here, but I think that not 1096 * wrapping context destruction requests makes the most sense. 1097 */ 1098 status = encode(rqstp, p, obj); 1099 goto out; 1100 } 1101 switch (gss_cred->gc_service) { 1102 case RPC_GSS_SVC_NONE: 1103 status = encode(rqstp, p, obj); 1104 break; 1105 case RPC_GSS_SVC_INTEGRITY: 1106 status = gss_wrap_req_integ(cred, ctx, encode, 1107 rqstp, p, obj); 1108 break; 1109 case RPC_GSS_SVC_PRIVACY: 1110 status = gss_wrap_req_priv(cred, ctx, encode, 1111 rqstp, p, obj); 1112 break; 1113 } 1114 out: 1115 gss_put_ctx(ctx); 1116 dprintk("RPC: %4u gss_wrap_req returning %d\n", task->tk_pid, status); 1117 return status; 1118 } 1119 1120 static inline int 1121 gss_unwrap_resp_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1122 struct rpc_rqst *rqstp, u32 **p) 1123 { 1124 struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 1125 struct xdr_buf integ_buf; 1126 struct xdr_netobj mic; 1127 u32 data_offset, mic_offset; 1128 u32 integ_len; 1129 u32 maj_stat; 1130 int status = -EIO; 1131 1132 integ_len = ntohl(*(*p)++); 1133 if (integ_len & 3) 1134 return status; 1135 data_offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 1136 mic_offset = integ_len + data_offset; 1137 if (mic_offset > rcv_buf->len) 1138 return status; 1139 if (ntohl(*(*p)++) != rqstp->rq_seqno) 1140 return status; 1141 1142 if (xdr_buf_subsegment(rcv_buf, &integ_buf, data_offset, 1143 mic_offset - data_offset)) 1144 return status; 1145 1146 if (xdr_buf_read_netobj(rcv_buf, &mic, mic_offset)) 1147 return status; 1148 1149 maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 1150 if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1151 cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE; 1152 if (maj_stat != GSS_S_COMPLETE) 1153 return status; 1154 return 0; 1155 } 1156 1157 static inline int 1158 gss_unwrap_resp_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1159 struct rpc_rqst *rqstp, u32 **p) 1160 { 1161 struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 1162 u32 offset; 1163 u32 opaque_len; 1164 u32 maj_stat; 1165 int status = -EIO; 1166 1167 opaque_len = ntohl(*(*p)++); 1168 offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 1169 if (offset + opaque_len > rcv_buf->len) 1170 return status; 1171 /* remove padding: */ 1172 rcv_buf->len = offset + opaque_len; 1173 1174 maj_stat = gss_unwrap(ctx->gc_gss_ctx, offset, rcv_buf); 1175 if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1176 cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE; 1177 if (maj_stat != GSS_S_COMPLETE) 1178 return status; 1179 if (ntohl(*(*p)++) != rqstp->rq_seqno) 1180 return status; 1181 1182 return 0; 1183 } 1184 1185 1186 static int 1187 gss_unwrap_resp(struct rpc_task *task, 1188 kxdrproc_t decode, void *rqstp, u32 *p, void *obj) 1189 { 1190 struct rpc_cred *cred = task->tk_msg.rpc_cred; 1191 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 1192 gc_base); 1193 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1194 u32 *savedp = p; 1195 struct kvec *head = ((struct rpc_rqst *)rqstp)->rq_rcv_buf.head; 1196 int savedlen = head->iov_len; 1197 int status = -EIO; 1198 1199 if (ctx->gc_proc != RPC_GSS_PROC_DATA) 1200 goto out_decode; 1201 switch (gss_cred->gc_service) { 1202 case RPC_GSS_SVC_NONE: 1203 break; 1204 case RPC_GSS_SVC_INTEGRITY: 1205 status = gss_unwrap_resp_integ(cred, ctx, rqstp, &p); 1206 if (status) 1207 goto out; 1208 break; 1209 case RPC_GSS_SVC_PRIVACY: 1210 status = gss_unwrap_resp_priv(cred, ctx, rqstp, &p); 1211 if (status) 1212 goto out; 1213 break; 1214 } 1215 /* take into account extra slack for integrity and privacy cases: */ 1216 task->tk_auth->au_rslack = task->tk_auth->au_verfsize + (p - savedp) 1217 + (savedlen - head->iov_len); 1218 out_decode: 1219 status = decode(rqstp, p, obj); 1220 out: 1221 gss_put_ctx(ctx); 1222 dprintk("RPC: %4u gss_unwrap_resp returning %d\n", task->tk_pid, 1223 status); 1224 return status; 1225 } 1226 1227 static struct rpc_authops authgss_ops = { 1228 .owner = THIS_MODULE, 1229 .au_flavor = RPC_AUTH_GSS, 1230 #ifdef RPC_DEBUG 1231 .au_name = "RPCSEC_GSS", 1232 #endif 1233 .create = gss_create, 1234 .destroy = gss_destroy, 1235 .lookup_cred = gss_lookup_cred, 1236 .crcreate = gss_create_cred 1237 }; 1238 1239 static struct rpc_credops gss_credops = { 1240 .cr_name = "AUTH_GSS", 1241 .crdestroy = gss_destroy_cred, 1242 .crmatch = gss_match, 1243 .crmarshal = gss_marshal, 1244 .crrefresh = gss_refresh, 1245 .crvalidate = gss_validate, 1246 .crwrap_req = gss_wrap_req, 1247 .crunwrap_resp = gss_unwrap_resp, 1248 }; 1249 1250 static struct rpc_pipe_ops gss_upcall_ops = { 1251 .upcall = gss_pipe_upcall, 1252 .downcall = gss_pipe_downcall, 1253 .destroy_msg = gss_pipe_destroy_msg, 1254 .release_pipe = gss_pipe_release, 1255 }; 1256 1257 /* 1258 * Initialize RPCSEC_GSS module 1259 */ 1260 static int __init init_rpcsec_gss(void) 1261 { 1262 int err = 0; 1263 1264 err = rpcauth_register(&authgss_ops); 1265 if (err) 1266 goto out; 1267 err = gss_svc_init(); 1268 if (err) 1269 goto out_unregister; 1270 return 0; 1271 out_unregister: 1272 rpcauth_unregister(&authgss_ops); 1273 out: 1274 return err; 1275 } 1276 1277 static void __exit exit_rpcsec_gss(void) 1278 { 1279 gss_svc_shutdown(); 1280 rpcauth_unregister(&authgss_ops); 1281 } 1282 1283 MODULE_LICENSE("GPL"); 1284 module_init(init_rpcsec_gss) 1285 module_exit(exit_rpcsec_gss) 1286