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 cred->cr_flags &= ~RPCAUTH_CRED_NEW; 162 write_unlock(&gss_ctx_lock); 163 if (old) 164 gss_put_ctx(old); 165 } 166 167 static int 168 gss_cred_is_uptodate_ctx(struct rpc_cred *cred) 169 { 170 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 171 int res = 0; 172 173 read_lock(&gss_ctx_lock); 174 if ((cred->cr_flags & RPCAUTH_CRED_UPTODATE) && gss_cred->gc_ctx) 175 res = 1; 176 read_unlock(&gss_ctx_lock); 177 return res; 178 } 179 180 static const void * 181 simple_get_bytes(const void *p, const void *end, void *res, size_t len) 182 { 183 const void *q = (const void *)((const char *)p + len); 184 if (unlikely(q > end || q < p)) 185 return ERR_PTR(-EFAULT); 186 memcpy(res, p, len); 187 return q; 188 } 189 190 static inline const void * 191 simple_get_netobj(const void *p, const void *end, struct xdr_netobj *dest) 192 { 193 const void *q; 194 unsigned int len; 195 196 p = simple_get_bytes(p, end, &len, sizeof(len)); 197 if (IS_ERR(p)) 198 return p; 199 q = (const void *)((const char *)p + len); 200 if (unlikely(q > end || q < p)) 201 return ERR_PTR(-EFAULT); 202 dest->data = kmalloc(len, GFP_KERNEL); 203 if (unlikely(dest->data == NULL)) 204 return ERR_PTR(-ENOMEM); 205 dest->len = len; 206 memcpy(dest->data, p, len); 207 return q; 208 } 209 210 static struct gss_cl_ctx * 211 gss_cred_get_ctx(struct rpc_cred *cred) 212 { 213 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 214 struct gss_cl_ctx *ctx = NULL; 215 216 read_lock(&gss_ctx_lock); 217 if (gss_cred->gc_ctx) 218 ctx = gss_get_ctx(gss_cred->gc_ctx); 219 read_unlock(&gss_ctx_lock); 220 return ctx; 221 } 222 223 static struct gss_cl_ctx * 224 gss_alloc_context(void) 225 { 226 struct gss_cl_ctx *ctx; 227 228 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); 229 if (ctx != NULL) { 230 memset(ctx, 0, sizeof(*ctx)); 231 ctx->gc_proc = RPC_GSS_PROC_DATA; 232 ctx->gc_seq = 1; /* NetApp 6.4R1 doesn't accept seq. no. 0 */ 233 spin_lock_init(&ctx->gc_seq_lock); 234 atomic_set(&ctx->count,1); 235 } 236 return ctx; 237 } 238 239 #define GSSD_MIN_TIMEOUT (60 * 60) 240 static const void * 241 gss_fill_context(const void *p, const void *end, struct gss_cl_ctx *ctx, struct gss_api_mech *gm) 242 { 243 const void *q; 244 unsigned int seclen; 245 unsigned int timeout; 246 u32 window_size; 247 int ret; 248 249 /* First unsigned int gives the lifetime (in seconds) of the cred */ 250 p = simple_get_bytes(p, end, &timeout, sizeof(timeout)); 251 if (IS_ERR(p)) 252 goto err; 253 if (timeout == 0) 254 timeout = GSSD_MIN_TIMEOUT; 255 ctx->gc_expiry = jiffies + (unsigned long)timeout * HZ * 3 / 4; 256 /* Sequence number window. Determines the maximum number of simultaneous requests */ 257 p = simple_get_bytes(p, end, &window_size, sizeof(window_size)); 258 if (IS_ERR(p)) 259 goto err; 260 ctx->gc_win = window_size; 261 /* gssd signals an error by passing ctx->gc_win = 0: */ 262 if (ctx->gc_win == 0) { 263 /* in which case, p points to an error code which we ignore */ 264 p = ERR_PTR(-EACCES); 265 goto err; 266 } 267 /* copy the opaque wire context */ 268 p = simple_get_netobj(p, end, &ctx->gc_wire_ctx); 269 if (IS_ERR(p)) 270 goto err; 271 /* import the opaque security context */ 272 p = simple_get_bytes(p, end, &seclen, sizeof(seclen)); 273 if (IS_ERR(p)) 274 goto err; 275 q = (const void *)((const char *)p + seclen); 276 if (unlikely(q > end || q < p)) { 277 p = ERR_PTR(-EFAULT); 278 goto err; 279 } 280 ret = gss_import_sec_context(p, seclen, gm, &ctx->gc_gss_ctx); 281 if (ret < 0) { 282 p = ERR_PTR(ret); 283 goto err; 284 } 285 return q; 286 err: 287 dprintk("RPC: gss_fill_context returning %ld\n", -PTR_ERR(p)); 288 return p; 289 } 290 291 292 struct gss_upcall_msg { 293 atomic_t count; 294 uid_t uid; 295 struct rpc_pipe_msg msg; 296 struct list_head list; 297 struct gss_auth *auth; 298 struct rpc_wait_queue rpc_waitqueue; 299 wait_queue_head_t waitqueue; 300 struct gss_cl_ctx *ctx; 301 }; 302 303 static void 304 gss_release_msg(struct gss_upcall_msg *gss_msg) 305 { 306 if (!atomic_dec_and_test(&gss_msg->count)) 307 return; 308 BUG_ON(!list_empty(&gss_msg->list)); 309 if (gss_msg->ctx != NULL) 310 gss_put_ctx(gss_msg->ctx); 311 kfree(gss_msg); 312 } 313 314 static struct gss_upcall_msg * 315 __gss_find_upcall(struct gss_auth *gss_auth, uid_t uid) 316 { 317 struct gss_upcall_msg *pos; 318 list_for_each_entry(pos, &gss_auth->upcalls, list) { 319 if (pos->uid != uid) 320 continue; 321 atomic_inc(&pos->count); 322 dprintk("RPC: gss_find_upcall found msg %p\n", pos); 323 return pos; 324 } 325 dprintk("RPC: gss_find_upcall found nothing\n"); 326 return NULL; 327 } 328 329 /* Try to add a upcall to the pipefs queue. 330 * If an upcall owned by our uid already exists, then we return a reference 331 * to that upcall instead of adding the new upcall. 332 */ 333 static inline struct gss_upcall_msg * 334 gss_add_msg(struct gss_auth *gss_auth, struct gss_upcall_msg *gss_msg) 335 { 336 struct gss_upcall_msg *old; 337 338 spin_lock(&gss_auth->lock); 339 old = __gss_find_upcall(gss_auth, gss_msg->uid); 340 if (old == NULL) { 341 atomic_inc(&gss_msg->count); 342 list_add(&gss_msg->list, &gss_auth->upcalls); 343 } else 344 gss_msg = old; 345 spin_unlock(&gss_auth->lock); 346 return gss_msg; 347 } 348 349 static void 350 __gss_unhash_msg(struct gss_upcall_msg *gss_msg) 351 { 352 if (list_empty(&gss_msg->list)) 353 return; 354 list_del_init(&gss_msg->list); 355 rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 356 wake_up_all(&gss_msg->waitqueue); 357 atomic_dec(&gss_msg->count); 358 } 359 360 static void 361 gss_unhash_msg(struct gss_upcall_msg *gss_msg) 362 { 363 struct gss_auth *gss_auth = gss_msg->auth; 364 365 spin_lock(&gss_auth->lock); 366 __gss_unhash_msg(gss_msg); 367 spin_unlock(&gss_auth->lock); 368 } 369 370 static void 371 gss_upcall_callback(struct rpc_task *task) 372 { 373 struct gss_cred *gss_cred = container_of(task->tk_msg.rpc_cred, 374 struct gss_cred, gc_base); 375 struct gss_upcall_msg *gss_msg = gss_cred->gc_upcall; 376 377 BUG_ON(gss_msg == NULL); 378 if (gss_msg->ctx) 379 gss_cred_set_ctx(task->tk_msg.rpc_cred, gss_get_ctx(gss_msg->ctx)); 380 else 381 task->tk_status = gss_msg->msg.errno; 382 spin_lock(&gss_msg->auth->lock); 383 gss_cred->gc_upcall = NULL; 384 rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 385 spin_unlock(&gss_msg->auth->lock); 386 gss_release_msg(gss_msg); 387 } 388 389 static inline struct gss_upcall_msg * 390 gss_alloc_msg(struct gss_auth *gss_auth, uid_t uid) 391 { 392 struct gss_upcall_msg *gss_msg; 393 394 gss_msg = kmalloc(sizeof(*gss_msg), GFP_KERNEL); 395 if (gss_msg != NULL) { 396 memset(gss_msg, 0, sizeof(*gss_msg)); 397 INIT_LIST_HEAD(&gss_msg->list); 398 rpc_init_wait_queue(&gss_msg->rpc_waitqueue, "RPCSEC_GSS upcall waitq"); 399 init_waitqueue_head(&gss_msg->waitqueue); 400 atomic_set(&gss_msg->count, 1); 401 gss_msg->msg.data = &gss_msg->uid; 402 gss_msg->msg.len = sizeof(gss_msg->uid); 403 gss_msg->uid = uid; 404 gss_msg->auth = gss_auth; 405 } 406 return gss_msg; 407 } 408 409 static struct gss_upcall_msg * 410 gss_setup_upcall(struct rpc_clnt *clnt, struct gss_auth *gss_auth, struct rpc_cred *cred) 411 { 412 struct gss_upcall_msg *gss_new, *gss_msg; 413 414 gss_new = gss_alloc_msg(gss_auth, cred->cr_uid); 415 if (gss_new == NULL) 416 return ERR_PTR(-ENOMEM); 417 gss_msg = gss_add_msg(gss_auth, gss_new); 418 if (gss_msg == gss_new) { 419 int res = rpc_queue_upcall(gss_auth->dentry->d_inode, &gss_new->msg); 420 if (res) { 421 gss_unhash_msg(gss_new); 422 gss_msg = ERR_PTR(res); 423 } 424 } else 425 gss_release_msg(gss_new); 426 return gss_msg; 427 } 428 429 static inline int 430 gss_refresh_upcall(struct rpc_task *task) 431 { 432 struct rpc_cred *cred = task->tk_msg.rpc_cred; 433 struct gss_auth *gss_auth = container_of(task->tk_client->cl_auth, 434 struct gss_auth, rpc_auth); 435 struct gss_cred *gss_cred = container_of(cred, 436 struct gss_cred, gc_base); 437 struct gss_upcall_msg *gss_msg; 438 int err = 0; 439 440 dprintk("RPC: %4u gss_refresh_upcall for uid %u\n", task->tk_pid, cred->cr_uid); 441 gss_msg = gss_setup_upcall(task->tk_client, gss_auth, cred); 442 if (IS_ERR(gss_msg)) { 443 err = PTR_ERR(gss_msg); 444 goto out; 445 } 446 spin_lock(&gss_auth->lock); 447 if (gss_cred->gc_upcall != NULL) 448 rpc_sleep_on(&gss_cred->gc_upcall->rpc_waitqueue, task, NULL, NULL); 449 else if (gss_msg->ctx == NULL && gss_msg->msg.errno >= 0) { 450 task->tk_timeout = 0; 451 gss_cred->gc_upcall = gss_msg; 452 /* gss_upcall_callback will release the reference to gss_upcall_msg */ 453 atomic_inc(&gss_msg->count); 454 rpc_sleep_on(&gss_msg->rpc_waitqueue, task, gss_upcall_callback, NULL); 455 } else 456 err = gss_msg->msg.errno; 457 spin_unlock(&gss_auth->lock); 458 gss_release_msg(gss_msg); 459 out: 460 dprintk("RPC: %4u gss_refresh_upcall for uid %u result %d\n", task->tk_pid, 461 cred->cr_uid, err); 462 return err; 463 } 464 465 static inline int 466 gss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred) 467 { 468 struct rpc_cred *cred = &gss_cred->gc_base; 469 struct gss_upcall_msg *gss_msg; 470 DEFINE_WAIT(wait); 471 int err = 0; 472 473 dprintk("RPC: gss_upcall for uid %u\n", cred->cr_uid); 474 gss_msg = gss_setup_upcall(gss_auth->client, gss_auth, cred); 475 if (IS_ERR(gss_msg)) { 476 err = PTR_ERR(gss_msg); 477 goto out; 478 } 479 for (;;) { 480 prepare_to_wait(&gss_msg->waitqueue, &wait, TASK_INTERRUPTIBLE); 481 spin_lock(&gss_auth->lock); 482 if (gss_msg->ctx != NULL || gss_msg->msg.errno < 0) { 483 spin_unlock(&gss_auth->lock); 484 break; 485 } 486 spin_unlock(&gss_auth->lock); 487 if (signalled()) { 488 err = -ERESTARTSYS; 489 goto out_intr; 490 } 491 schedule(); 492 } 493 if (gss_msg->ctx) 494 gss_cred_set_ctx(cred, gss_get_ctx(gss_msg->ctx)); 495 else 496 err = gss_msg->msg.errno; 497 out_intr: 498 finish_wait(&gss_msg->waitqueue, &wait); 499 gss_release_msg(gss_msg); 500 out: 501 dprintk("RPC: gss_create_upcall for uid %u result %d\n", cred->cr_uid, err); 502 return err; 503 } 504 505 static ssize_t 506 gss_pipe_upcall(struct file *filp, struct rpc_pipe_msg *msg, 507 char __user *dst, size_t buflen) 508 { 509 char *data = (char *)msg->data + msg->copied; 510 ssize_t mlen = msg->len; 511 ssize_t left; 512 513 if (mlen > buflen) 514 mlen = buflen; 515 left = copy_to_user(dst, data, mlen); 516 if (left < 0) { 517 msg->errno = left; 518 return left; 519 } 520 mlen -= left; 521 msg->copied += mlen; 522 msg->errno = 0; 523 return mlen; 524 } 525 526 #define MSG_BUF_MAXSIZE 1024 527 528 static ssize_t 529 gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen) 530 { 531 const void *p, *end; 532 void *buf; 533 struct rpc_clnt *clnt; 534 struct gss_auth *gss_auth; 535 struct rpc_cred *cred; 536 struct gss_upcall_msg *gss_msg; 537 struct gss_cl_ctx *ctx; 538 uid_t uid; 539 int err = -EFBIG; 540 541 if (mlen > MSG_BUF_MAXSIZE) 542 goto out; 543 err = -ENOMEM; 544 buf = kmalloc(mlen, GFP_KERNEL); 545 if (!buf) 546 goto out; 547 548 clnt = RPC_I(filp->f_dentry->d_inode)->private; 549 err = -EFAULT; 550 if (copy_from_user(buf, src, mlen)) 551 goto err; 552 553 end = (const void *)((char *)buf + mlen); 554 p = simple_get_bytes(buf, end, &uid, sizeof(uid)); 555 if (IS_ERR(p)) { 556 err = PTR_ERR(p); 557 goto err; 558 } 559 560 err = -ENOMEM; 561 ctx = gss_alloc_context(); 562 if (ctx == NULL) 563 goto err; 564 err = 0; 565 gss_auth = container_of(clnt->cl_auth, struct gss_auth, rpc_auth); 566 p = gss_fill_context(p, end, ctx, gss_auth->mech); 567 if (IS_ERR(p)) { 568 err = PTR_ERR(p); 569 if (err != -EACCES) 570 goto err_put_ctx; 571 } 572 spin_lock(&gss_auth->lock); 573 gss_msg = __gss_find_upcall(gss_auth, uid); 574 if (gss_msg) { 575 if (err == 0 && gss_msg->ctx == NULL) 576 gss_msg->ctx = gss_get_ctx(ctx); 577 gss_msg->msg.errno = err; 578 __gss_unhash_msg(gss_msg); 579 spin_unlock(&gss_auth->lock); 580 gss_release_msg(gss_msg); 581 } else { 582 struct auth_cred acred = { .uid = uid }; 583 spin_unlock(&gss_auth->lock); 584 cred = rpcauth_lookup_credcache(clnt->cl_auth, &acred, RPCAUTH_LOOKUP_NEW); 585 if (IS_ERR(cred)) { 586 err = PTR_ERR(cred); 587 goto err_put_ctx; 588 } 589 gss_cred_set_ctx(cred, gss_get_ctx(ctx)); 590 } 591 gss_put_ctx(ctx); 592 kfree(buf); 593 dprintk("RPC: gss_pipe_downcall returning length %Zu\n", mlen); 594 return mlen; 595 err_put_ctx: 596 gss_put_ctx(ctx); 597 err: 598 kfree(buf); 599 out: 600 dprintk("RPC: gss_pipe_downcall returning %d\n", err); 601 return err; 602 } 603 604 static void 605 gss_pipe_release(struct inode *inode) 606 { 607 struct rpc_inode *rpci = RPC_I(inode); 608 struct rpc_clnt *clnt; 609 struct rpc_auth *auth; 610 struct gss_auth *gss_auth; 611 612 clnt = rpci->private; 613 auth = clnt->cl_auth; 614 gss_auth = container_of(auth, struct gss_auth, rpc_auth); 615 spin_lock(&gss_auth->lock); 616 while (!list_empty(&gss_auth->upcalls)) { 617 struct gss_upcall_msg *gss_msg; 618 619 gss_msg = list_entry(gss_auth->upcalls.next, 620 struct gss_upcall_msg, list); 621 gss_msg->msg.errno = -EPIPE; 622 atomic_inc(&gss_msg->count); 623 __gss_unhash_msg(gss_msg); 624 spin_unlock(&gss_auth->lock); 625 gss_release_msg(gss_msg); 626 spin_lock(&gss_auth->lock); 627 } 628 spin_unlock(&gss_auth->lock); 629 } 630 631 static void 632 gss_pipe_destroy_msg(struct rpc_pipe_msg *msg) 633 { 634 struct gss_upcall_msg *gss_msg = container_of(msg, struct gss_upcall_msg, msg); 635 static unsigned long ratelimit; 636 637 if (msg->errno < 0) { 638 dprintk("RPC: gss_pipe_destroy_msg releasing msg %p\n", 639 gss_msg); 640 atomic_inc(&gss_msg->count); 641 gss_unhash_msg(gss_msg); 642 if (msg->errno == -ETIMEDOUT) { 643 unsigned long now = jiffies; 644 if (time_after(now, ratelimit)) { 645 printk(KERN_WARNING "RPC: AUTH_GSS upcall timed out.\n" 646 "Please check user daemon is running!\n"); 647 ratelimit = now + 15*HZ; 648 } 649 } 650 gss_release_msg(gss_msg); 651 } 652 } 653 654 /* 655 * NOTE: we have the opportunity to use different 656 * parameters based on the input flavor (which must be a pseudoflavor) 657 */ 658 static struct rpc_auth * 659 gss_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor) 660 { 661 struct gss_auth *gss_auth; 662 struct rpc_auth * auth; 663 int err = -ENOMEM; /* XXX? */ 664 665 dprintk("RPC: creating GSS authenticator for client %p\n",clnt); 666 667 if (!try_module_get(THIS_MODULE)) 668 return ERR_PTR(err); 669 if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL))) 670 goto out_dec; 671 gss_auth->client = clnt; 672 err = -EINVAL; 673 gss_auth->mech = gss_mech_get_by_pseudoflavor(flavor); 674 if (!gss_auth->mech) { 675 printk(KERN_WARNING "%s: Pseudoflavor %d not found!", 676 __FUNCTION__, flavor); 677 goto err_free; 678 } 679 gss_auth->service = gss_pseudoflavor_to_service(gss_auth->mech, flavor); 680 if (gss_auth->service == 0) 681 goto err_put_mech; 682 INIT_LIST_HEAD(&gss_auth->upcalls); 683 spin_lock_init(&gss_auth->lock); 684 auth = &gss_auth->rpc_auth; 685 auth->au_cslack = GSS_CRED_SLACK >> 2; 686 auth->au_rslack = GSS_VERF_SLACK >> 2; 687 auth->au_ops = &authgss_ops; 688 auth->au_flavor = flavor; 689 atomic_set(&auth->au_count, 1); 690 691 err = rpcauth_init_credcache(auth, GSS_CRED_EXPIRE); 692 if (err) 693 goto err_put_mech; 694 695 snprintf(gss_auth->path, sizeof(gss_auth->path), "%s/%s", 696 clnt->cl_pathname, 697 gss_auth->mech->gm_name); 698 gss_auth->dentry = rpc_mkpipe(gss_auth->path, clnt, &gss_upcall_ops, RPC_PIPE_WAIT_FOR_OPEN); 699 if (IS_ERR(gss_auth->dentry)) { 700 err = PTR_ERR(gss_auth->dentry); 701 goto err_put_mech; 702 } 703 704 return auth; 705 err_put_mech: 706 gss_mech_put(gss_auth->mech); 707 err_free: 708 kfree(gss_auth); 709 out_dec: 710 module_put(THIS_MODULE); 711 return ERR_PTR(err); 712 } 713 714 static void 715 gss_destroy(struct rpc_auth *auth) 716 { 717 struct gss_auth *gss_auth; 718 719 dprintk("RPC: destroying GSS authenticator %p flavor %d\n", 720 auth, auth->au_flavor); 721 722 gss_auth = container_of(auth, struct gss_auth, rpc_auth); 723 rpc_unlink(gss_auth->path); 724 dput(gss_auth->dentry); 725 gss_auth->dentry = NULL; 726 gss_mech_put(gss_auth->mech); 727 728 rpcauth_free_credcache(auth); 729 kfree(gss_auth); 730 module_put(THIS_MODULE); 731 } 732 733 /* gss_destroy_cred (and gss_destroy_ctx) are used to clean up after failure 734 * to create a new cred or context, so they check that things have been 735 * allocated before freeing them. */ 736 static void 737 gss_destroy_ctx(struct gss_cl_ctx *ctx) 738 { 739 dprintk("RPC: gss_destroy_ctx\n"); 740 741 if (ctx->gc_gss_ctx) 742 gss_delete_sec_context(&ctx->gc_gss_ctx); 743 744 kfree(ctx->gc_wire_ctx.data); 745 kfree(ctx); 746 } 747 748 static void 749 gss_destroy_cred(struct rpc_cred *rc) 750 { 751 struct gss_cred *cred = container_of(rc, struct gss_cred, gc_base); 752 753 dprintk("RPC: gss_destroy_cred \n"); 754 755 if (cred->gc_ctx) 756 gss_put_ctx(cred->gc_ctx); 757 kfree(cred); 758 } 759 760 /* 761 * Lookup RPCSEC_GSS cred for the current process 762 */ 763 static struct rpc_cred * 764 gss_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) 765 { 766 return rpcauth_lookup_credcache(auth, acred, flags); 767 } 768 769 static struct rpc_cred * 770 gss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) 771 { 772 struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 773 struct gss_cred *cred = NULL; 774 int err = -ENOMEM; 775 776 dprintk("RPC: gss_create_cred for uid %d, flavor %d\n", 777 acred->uid, auth->au_flavor); 778 779 if (!(cred = kmalloc(sizeof(*cred), GFP_KERNEL))) 780 goto out_err; 781 782 memset(cred, 0, sizeof(*cred)); 783 atomic_set(&cred->gc_count, 1); 784 cred->gc_uid = acred->uid; 785 /* 786 * Note: in order to force a call to call_refresh(), we deliberately 787 * fail to flag the credential as RPCAUTH_CRED_UPTODATE. 788 */ 789 cred->gc_flags = 0; 790 cred->gc_base.cr_ops = &gss_credops; 791 cred->gc_base.cr_flags = RPCAUTH_CRED_NEW; 792 cred->gc_service = gss_auth->service; 793 return &cred->gc_base; 794 795 out_err: 796 dprintk("RPC: gss_create_cred failed with error %d\n", err); 797 return ERR_PTR(err); 798 } 799 800 static int 801 gss_cred_init(struct rpc_auth *auth, struct rpc_cred *cred) 802 { 803 struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 804 struct gss_cred *gss_cred = container_of(cred,struct gss_cred, gc_base); 805 int err; 806 807 do { 808 err = gss_create_upcall(gss_auth, gss_cred); 809 } while (err == -EAGAIN); 810 return err; 811 } 812 813 static int 814 gss_match(struct auth_cred *acred, struct rpc_cred *rc, int flags) 815 { 816 struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base); 817 818 /* 819 * If the searchflags have set RPCAUTH_LOOKUP_NEW, then 820 * we don't really care if the credential has expired or not, 821 * since the caller should be prepared to reinitialise it. 822 */ 823 if ((flags & RPCAUTH_LOOKUP_NEW) && (rc->cr_flags & RPCAUTH_CRED_NEW)) 824 goto out; 825 /* Don't match with creds that have expired. */ 826 if (gss_cred->gc_ctx && time_after(jiffies, gss_cred->gc_ctx->gc_expiry)) 827 return 0; 828 out: 829 return (rc->cr_uid == acred->uid); 830 } 831 832 /* 833 * Marshal credentials. 834 * Maybe we should keep a cached credential for performance reasons. 835 */ 836 static u32 * 837 gss_marshal(struct rpc_task *task, u32 *p) 838 { 839 struct rpc_cred *cred = task->tk_msg.rpc_cred; 840 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 841 gc_base); 842 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 843 u32 *cred_len; 844 struct rpc_rqst *req = task->tk_rqstp; 845 u32 maj_stat = 0; 846 struct xdr_netobj mic; 847 struct kvec iov; 848 struct xdr_buf verf_buf; 849 850 dprintk("RPC: %4u gss_marshal\n", task->tk_pid); 851 852 *p++ = htonl(RPC_AUTH_GSS); 853 cred_len = p++; 854 855 spin_lock(&ctx->gc_seq_lock); 856 req->rq_seqno = ctx->gc_seq++; 857 spin_unlock(&ctx->gc_seq_lock); 858 859 *p++ = htonl((u32) RPC_GSS_VERSION); 860 *p++ = htonl((u32) ctx->gc_proc); 861 *p++ = htonl((u32) req->rq_seqno); 862 *p++ = htonl((u32) gss_cred->gc_service); 863 p = xdr_encode_netobj(p, &ctx->gc_wire_ctx); 864 *cred_len = htonl((p - (cred_len + 1)) << 2); 865 866 /* We compute the checksum for the verifier over the xdr-encoded bytes 867 * starting with the xid and ending at the end of the credential: */ 868 iov.iov_base = xprt_skip_transport_header(task->tk_xprt, 869 req->rq_snd_buf.head[0].iov_base); 870 iov.iov_len = (u8 *)p - (u8 *)iov.iov_base; 871 xdr_buf_from_iov(&iov, &verf_buf); 872 873 /* set verifier flavor*/ 874 *p++ = htonl(RPC_AUTH_GSS); 875 876 mic.data = (u8 *)(p + 1); 877 maj_stat = gss_get_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 878 if (maj_stat == GSS_S_CONTEXT_EXPIRED) { 879 cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE; 880 } else if (maj_stat != 0) { 881 printk("gss_marshal: gss_get_mic FAILED (%d)\n", maj_stat); 882 goto out_put_ctx; 883 } 884 p = xdr_encode_opaque(p, NULL, mic.len); 885 gss_put_ctx(ctx); 886 return p; 887 out_put_ctx: 888 gss_put_ctx(ctx); 889 return NULL; 890 } 891 892 /* 893 * Refresh credentials. XXX - finish 894 */ 895 static int 896 gss_refresh(struct rpc_task *task) 897 { 898 899 if (!gss_cred_is_uptodate_ctx(task->tk_msg.rpc_cred)) 900 return gss_refresh_upcall(task); 901 return 0; 902 } 903 904 static u32 * 905 gss_validate(struct rpc_task *task, u32 *p) 906 { 907 struct rpc_cred *cred = task->tk_msg.rpc_cred; 908 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 909 u32 seq; 910 struct kvec iov; 911 struct xdr_buf verf_buf; 912 struct xdr_netobj mic; 913 u32 flav,len; 914 u32 maj_stat; 915 916 dprintk("RPC: %4u gss_validate\n", task->tk_pid); 917 918 flav = ntohl(*p++); 919 if ((len = ntohl(*p++)) > RPC_MAX_AUTH_SIZE) 920 goto out_bad; 921 if (flav != RPC_AUTH_GSS) 922 goto out_bad; 923 seq = htonl(task->tk_rqstp->rq_seqno); 924 iov.iov_base = &seq; 925 iov.iov_len = sizeof(seq); 926 xdr_buf_from_iov(&iov, &verf_buf); 927 mic.data = (u8 *)p; 928 mic.len = len; 929 930 maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 931 if (maj_stat == GSS_S_CONTEXT_EXPIRED) 932 cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE; 933 if (maj_stat) 934 goto out_bad; 935 /* We leave it to unwrap to calculate au_rslack. For now we just 936 * calculate the length of the verifier: */ 937 task->tk_auth->au_verfsize = XDR_QUADLEN(len) + 2; 938 gss_put_ctx(ctx); 939 dprintk("RPC: %4u GSS gss_validate: gss_verify_mic succeeded.\n", 940 task->tk_pid); 941 return p + XDR_QUADLEN(len); 942 out_bad: 943 gss_put_ctx(ctx); 944 dprintk("RPC: %4u gss_validate failed.\n", task->tk_pid); 945 return NULL; 946 } 947 948 static inline int 949 gss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 950 kxdrproc_t encode, struct rpc_rqst *rqstp, u32 *p, void *obj) 951 { 952 struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 953 struct xdr_buf integ_buf; 954 u32 *integ_len = NULL; 955 struct xdr_netobj mic; 956 u32 offset, *q; 957 struct kvec *iov; 958 u32 maj_stat = 0; 959 int status = -EIO; 960 961 integ_len = p++; 962 offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 963 *p++ = htonl(rqstp->rq_seqno); 964 965 status = encode(rqstp, p, obj); 966 if (status) 967 return status; 968 969 if (xdr_buf_subsegment(snd_buf, &integ_buf, 970 offset, snd_buf->len - offset)) 971 return status; 972 *integ_len = htonl(integ_buf.len); 973 974 /* guess whether we're in the head or the tail: */ 975 if (snd_buf->page_len || snd_buf->tail[0].iov_len) 976 iov = snd_buf->tail; 977 else 978 iov = snd_buf->head; 979 p = iov->iov_base + iov->iov_len; 980 mic.data = (u8 *)(p + 1); 981 982 maj_stat = gss_get_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 983 status = -EIO; /* XXX? */ 984 if (maj_stat == GSS_S_CONTEXT_EXPIRED) 985 cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE; 986 else if (maj_stat) 987 return status; 988 q = xdr_encode_opaque(p, NULL, mic.len); 989 990 offset = (u8 *)q - (u8 *)p; 991 iov->iov_len += offset; 992 snd_buf->len += offset; 993 return 0; 994 } 995 996 static void 997 priv_release_snd_buf(struct rpc_rqst *rqstp) 998 { 999 int i; 1000 1001 for (i=0; i < rqstp->rq_enc_pages_num; i++) 1002 __free_page(rqstp->rq_enc_pages[i]); 1003 kfree(rqstp->rq_enc_pages); 1004 } 1005 1006 static int 1007 alloc_enc_pages(struct rpc_rqst *rqstp) 1008 { 1009 struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 1010 int first, last, i; 1011 1012 if (snd_buf->page_len == 0) { 1013 rqstp->rq_enc_pages_num = 0; 1014 return 0; 1015 } 1016 1017 first = snd_buf->page_base >> PAGE_CACHE_SHIFT; 1018 last = (snd_buf->page_base + snd_buf->page_len - 1) >> PAGE_CACHE_SHIFT; 1019 rqstp->rq_enc_pages_num = last - first + 1 + 1; 1020 rqstp->rq_enc_pages 1021 = kmalloc(rqstp->rq_enc_pages_num * sizeof(struct page *), 1022 GFP_NOFS); 1023 if (!rqstp->rq_enc_pages) 1024 goto out; 1025 for (i=0; i < rqstp->rq_enc_pages_num; i++) { 1026 rqstp->rq_enc_pages[i] = alloc_page(GFP_NOFS); 1027 if (rqstp->rq_enc_pages[i] == NULL) 1028 goto out_free; 1029 } 1030 rqstp->rq_release_snd_buf = priv_release_snd_buf; 1031 return 0; 1032 out_free: 1033 for (i--; i >= 0; i--) { 1034 __free_page(rqstp->rq_enc_pages[i]); 1035 } 1036 out: 1037 return -EAGAIN; 1038 } 1039 1040 static inline int 1041 gss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1042 kxdrproc_t encode, struct rpc_rqst *rqstp, u32 *p, void *obj) 1043 { 1044 struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 1045 u32 offset; 1046 u32 maj_stat; 1047 int status; 1048 u32 *opaque_len; 1049 struct page **inpages; 1050 int first; 1051 int pad; 1052 struct kvec *iov; 1053 char *tmp; 1054 1055 opaque_len = p++; 1056 offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 1057 *p++ = htonl(rqstp->rq_seqno); 1058 1059 status = encode(rqstp, p, obj); 1060 if (status) 1061 return status; 1062 1063 status = alloc_enc_pages(rqstp); 1064 if (status) 1065 return status; 1066 first = snd_buf->page_base >> PAGE_CACHE_SHIFT; 1067 inpages = snd_buf->pages + first; 1068 snd_buf->pages = rqstp->rq_enc_pages; 1069 snd_buf->page_base -= first << PAGE_CACHE_SHIFT; 1070 /* Give the tail its own page, in case we need extra space in the 1071 * head when wrapping: */ 1072 if (snd_buf->page_len || snd_buf->tail[0].iov_len) { 1073 tmp = page_address(rqstp->rq_enc_pages[rqstp->rq_enc_pages_num - 1]); 1074 memcpy(tmp, snd_buf->tail[0].iov_base, snd_buf->tail[0].iov_len); 1075 snd_buf->tail[0].iov_base = tmp; 1076 } 1077 maj_stat = gss_wrap(ctx->gc_gss_ctx, offset, snd_buf, inpages); 1078 /* RPC_SLACK_SPACE should prevent this ever happening: */ 1079 BUG_ON(snd_buf->len > snd_buf->buflen); 1080 status = -EIO; 1081 /* We're assuming that when GSS_S_CONTEXT_EXPIRED, the encryption was 1082 * done anyway, so it's safe to put the request on the wire: */ 1083 if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1084 cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE; 1085 else if (maj_stat) 1086 return status; 1087 1088 *opaque_len = htonl(snd_buf->len - offset); 1089 /* guess whether we're in the head or the tail: */ 1090 if (snd_buf->page_len || snd_buf->tail[0].iov_len) 1091 iov = snd_buf->tail; 1092 else 1093 iov = snd_buf->head; 1094 p = iov->iov_base + iov->iov_len; 1095 pad = 3 - ((snd_buf->len - offset - 1) & 3); 1096 memset(p, 0, pad); 1097 iov->iov_len += pad; 1098 snd_buf->len += pad; 1099 1100 return 0; 1101 } 1102 1103 static int 1104 gss_wrap_req(struct rpc_task *task, 1105 kxdrproc_t encode, void *rqstp, u32 *p, void *obj) 1106 { 1107 struct rpc_cred *cred = task->tk_msg.rpc_cred; 1108 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 1109 gc_base); 1110 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1111 int status = -EIO; 1112 1113 dprintk("RPC: %4u gss_wrap_req\n", task->tk_pid); 1114 if (ctx->gc_proc != RPC_GSS_PROC_DATA) { 1115 /* The spec seems a little ambiguous here, but I think that not 1116 * wrapping context destruction requests makes the most sense. 1117 */ 1118 status = encode(rqstp, p, obj); 1119 goto out; 1120 } 1121 switch (gss_cred->gc_service) { 1122 case RPC_GSS_SVC_NONE: 1123 status = encode(rqstp, p, obj); 1124 break; 1125 case RPC_GSS_SVC_INTEGRITY: 1126 status = gss_wrap_req_integ(cred, ctx, encode, 1127 rqstp, p, obj); 1128 break; 1129 case RPC_GSS_SVC_PRIVACY: 1130 status = gss_wrap_req_priv(cred, ctx, encode, 1131 rqstp, p, obj); 1132 break; 1133 } 1134 out: 1135 gss_put_ctx(ctx); 1136 dprintk("RPC: %4u gss_wrap_req returning %d\n", task->tk_pid, status); 1137 return status; 1138 } 1139 1140 static inline int 1141 gss_unwrap_resp_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1142 struct rpc_rqst *rqstp, u32 **p) 1143 { 1144 struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 1145 struct xdr_buf integ_buf; 1146 struct xdr_netobj mic; 1147 u32 data_offset, mic_offset; 1148 u32 integ_len; 1149 u32 maj_stat; 1150 int status = -EIO; 1151 1152 integ_len = ntohl(*(*p)++); 1153 if (integ_len & 3) 1154 return status; 1155 data_offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 1156 mic_offset = integ_len + data_offset; 1157 if (mic_offset > rcv_buf->len) 1158 return status; 1159 if (ntohl(*(*p)++) != rqstp->rq_seqno) 1160 return status; 1161 1162 if (xdr_buf_subsegment(rcv_buf, &integ_buf, data_offset, 1163 mic_offset - data_offset)) 1164 return status; 1165 1166 if (xdr_buf_read_netobj(rcv_buf, &mic, mic_offset)) 1167 return status; 1168 1169 maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 1170 if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1171 cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE; 1172 if (maj_stat != GSS_S_COMPLETE) 1173 return status; 1174 return 0; 1175 } 1176 1177 static inline int 1178 gss_unwrap_resp_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1179 struct rpc_rqst *rqstp, u32 **p) 1180 { 1181 struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 1182 u32 offset; 1183 u32 opaque_len; 1184 u32 maj_stat; 1185 int status = -EIO; 1186 1187 opaque_len = ntohl(*(*p)++); 1188 offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 1189 if (offset + opaque_len > rcv_buf->len) 1190 return status; 1191 /* remove padding: */ 1192 rcv_buf->len = offset + opaque_len; 1193 1194 maj_stat = gss_unwrap(ctx->gc_gss_ctx, offset, rcv_buf); 1195 if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1196 cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE; 1197 if (maj_stat != GSS_S_COMPLETE) 1198 return status; 1199 if (ntohl(*(*p)++) != rqstp->rq_seqno) 1200 return status; 1201 1202 return 0; 1203 } 1204 1205 1206 static int 1207 gss_unwrap_resp(struct rpc_task *task, 1208 kxdrproc_t decode, void *rqstp, u32 *p, void *obj) 1209 { 1210 struct rpc_cred *cred = task->tk_msg.rpc_cred; 1211 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 1212 gc_base); 1213 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1214 u32 *savedp = p; 1215 struct kvec *head = ((struct rpc_rqst *)rqstp)->rq_rcv_buf.head; 1216 int savedlen = head->iov_len; 1217 int status = -EIO; 1218 1219 if (ctx->gc_proc != RPC_GSS_PROC_DATA) 1220 goto out_decode; 1221 switch (gss_cred->gc_service) { 1222 case RPC_GSS_SVC_NONE: 1223 break; 1224 case RPC_GSS_SVC_INTEGRITY: 1225 status = gss_unwrap_resp_integ(cred, ctx, rqstp, &p); 1226 if (status) 1227 goto out; 1228 break; 1229 case RPC_GSS_SVC_PRIVACY: 1230 status = gss_unwrap_resp_priv(cred, ctx, rqstp, &p); 1231 if (status) 1232 goto out; 1233 break; 1234 } 1235 /* take into account extra slack for integrity and privacy cases: */ 1236 task->tk_auth->au_rslack = task->tk_auth->au_verfsize + (p - savedp) 1237 + (savedlen - head->iov_len); 1238 out_decode: 1239 status = decode(rqstp, p, obj); 1240 out: 1241 gss_put_ctx(ctx); 1242 dprintk("RPC: %4u gss_unwrap_resp returning %d\n", task->tk_pid, 1243 status); 1244 return status; 1245 } 1246 1247 static struct rpc_authops authgss_ops = { 1248 .owner = THIS_MODULE, 1249 .au_flavor = RPC_AUTH_GSS, 1250 #ifdef RPC_DEBUG 1251 .au_name = "RPCSEC_GSS", 1252 #endif 1253 .create = gss_create, 1254 .destroy = gss_destroy, 1255 .lookup_cred = gss_lookup_cred, 1256 .crcreate = gss_create_cred 1257 }; 1258 1259 static struct rpc_credops gss_credops = { 1260 .cr_name = "AUTH_GSS", 1261 .crdestroy = gss_destroy_cred, 1262 .cr_init = gss_cred_init, 1263 .crmatch = gss_match, 1264 .crmarshal = gss_marshal, 1265 .crrefresh = gss_refresh, 1266 .crvalidate = gss_validate, 1267 .crwrap_req = gss_wrap_req, 1268 .crunwrap_resp = gss_unwrap_resp, 1269 }; 1270 1271 static struct rpc_pipe_ops gss_upcall_ops = { 1272 .upcall = gss_pipe_upcall, 1273 .downcall = gss_pipe_downcall, 1274 .destroy_msg = gss_pipe_destroy_msg, 1275 .release_pipe = gss_pipe_release, 1276 }; 1277 1278 /* 1279 * Initialize RPCSEC_GSS module 1280 */ 1281 static int __init init_rpcsec_gss(void) 1282 { 1283 int err = 0; 1284 1285 err = rpcauth_register(&authgss_ops); 1286 if (err) 1287 goto out; 1288 err = gss_svc_init(); 1289 if (err) 1290 goto out_unregister; 1291 return 0; 1292 out_unregister: 1293 rpcauth_unregister(&authgss_ops); 1294 out: 1295 return err; 1296 } 1297 1298 static void __exit exit_rpcsec_gss(void) 1299 { 1300 gss_svc_shutdown(); 1301 rpcauth_unregister(&authgss_ops); 1302 } 1303 1304 MODULE_LICENSE("GPL"); 1305 module_init(init_rpcsec_gss) 1306 module_exit(exit_rpcsec_gss) 1307