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RPCSEC_GSS: Add support for privacy to krb5 rpcsec_gss mechanism.
[linux-2.6-block.git] / net / sunrpc / auth_gss / auth_gss.c
CommitLineData
1da177e4
LT		 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>
1da177e4 45#include <linux/sched.h>
2d2da60c 46#include <linux/pagemap.h>
1da177e4
LT		 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 struct rpc_authops authgss_ops;
58
59static 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
82static DEFINE_RWLOCK(gss_ctx_lock);
83
84struct 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;
f134585a 91 char path[48];
1da177e4
LT		 92 spinlock_t lock;
93};
94
95static void gss_destroy_ctx(struct gss_cl_ctx *);
96static struct rpc_pipe_ops gss_upcall_ops;
97
98void
99print_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
136EXPORT_SYMBOL(print_hexl);
137
138static inline struct gss_cl_ctx *
139gss_get_ctx(struct gss_cl_ctx *ctx)
140{
141 atomic_inc(&ctx->count);
142 return ctx;
143}
144
145static inline void
146gss_put_ctx(struct gss_cl_ctx *ctx)
147{
148 if (atomic_dec_and_test(&ctx->count))
149 gss_destroy_ctx(ctx);
150}
151
152static void
153gss_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
166static int
167gss_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
179static const void *
180simple_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
189static inline const void *
190simple_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
209static struct gss_cl_ctx *
210gss_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
222static struct gss_cl_ctx *
223gss_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)
239static const void *
240gss_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;
285err:
286 dprintk("RPC: gss_fill_context returning %ld\n", -PTR_ERR(p));
287 return p;
288}
289
290
291struct 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
302static void
303gss_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
313static 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 */
332static inline struct gss_upcall_msg *
333gss_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
348static 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
359static void
360gss_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
369static void
370gss_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
388static inline struct gss_upcall_msg *
389gss_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
408static struct gss_upcall_msg *
409gss_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
428static inline int
429gss_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);
458out:
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
464static inline int
465gss_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;
496out_intr:
497 finish_wait(&gss_msg->waitqueue, &wait);
498 gss_release_msg(gss_msg);
499out:
500 dprintk("RPC: gss_create_upcall for uid %u result %d\n", cred->cr_uid, err);
501 return err;
502}
503
504static ssize_t
505gss_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
527static ssize_t
528gss_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;
594err_put_ctx:
595 gss_put_ctx(ctx);
596err:
597 kfree(buf);
598out:
599 dprintk("RPC: gss_pipe_downcall returning %d\n", err);
600 return err;
601}
602
603static void
604gss_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
630static void
631gss_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 */
657static struct rpc_auth *
658gss_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor)
659{
660 struct gss_auth *gss_auth;
661 struct rpc_auth * auth;
6a19275a 662 int err = -ENOMEM; /* XXX? */
1da177e4
LT		 663
664 dprintk("RPC: creating GSS authenticator for client %p\n",clnt);
665
666 if (!try_module_get(THIS_MODULE))
6a19275a 667 return ERR_PTR(err);
1da177e4
LT		 668 if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL)))
669 goto out_dec;
670 gss_auth->client = clnt;
6a19275a 671 err = -EINVAL;
1da177e4
LT		 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);
438b6fde
BF		 679 if (gss_auth->service == 0)
680 goto err_put_mech;
1da177e4
LT		 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
6a19275a
BF		 690 err = rpcauth_init_credcache(auth, GSS_CRED_EXPIRE);
691 if (err)
1da177e4
LT		 692 goto err_put_mech;
693
f134585a
TM		 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);
6a19275a
BF		 698 if (IS_ERR(gss_auth->dentry)) {
699 err = PTR_ERR(gss_auth->dentry);
1da177e4 700 goto err_put_mech;
6a19275a 701 }
1da177e4
LT		 702
703 return auth;
704err_put_mech:
705 gss_mech_put(gss_auth->mech);
706err_free:
707 kfree(gss_auth);
708out_dec:
709 module_put(THIS_MODULE);
6a19275a 710 return ERR_PTR(err);
1da177e4
LT		 711}
712
713static void
714gss_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);
f134585a 722 rpc_unlink(gss_auth->path);
1da177e4
LT		 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. */
733static void
734gss_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
745static void
746gss_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 */
760static struct rpc_cred *
761gss_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int taskflags)
762{
763 return rpcauth_lookup_credcache(auth, acred, taskflags);
764}
765
766static struct rpc_cred *
767gss_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
795out_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
801static int
802gss_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*/
816static u32 *
817gss_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: */
808012fb
CL		 848 iov.iov_base = xprt_skip_transport_header(task->tk_xprt,
849 req->rq_snd_buf.head[0].iov_base);
1da177e4
LT		 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,
858 GSS_C_QOP_DEFAULT,
859 &verf_buf, &mic);
860 if (maj_stat == GSS_S_CONTEXT_EXPIRED) {
861 cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE;
862 } else if (maj_stat != 0) {
863 printk("gss_marshal: gss_get_mic FAILED (%d)\n", maj_stat);
864 goto out_put_ctx;
865 }
866 p = xdr_encode_opaque(p, NULL, mic.len);
867 gss_put_ctx(ctx);
868 return p;
869out_put_ctx:
870 gss_put_ctx(ctx);
871 return NULL;
872}
873
874/*
875* Refresh credentials. XXX - finish
876*/
877static int
878gss_refresh(struct rpc_task *task)
879{
880
881 if (!gss_cred_is_uptodate_ctx(task->tk_msg.rpc_cred))
882 return gss_refresh_upcall(task);
883 return 0;
884}
885
886static u32 *
887gss_validate(struct rpc_task *task, u32 *p)
888{
889 struct rpc_cred *cred = task->tk_msg.rpc_cred;
1da177e4
LT		 890 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred);
891 u32 seq, qop_state;
892 struct kvec iov;
893 struct xdr_buf verf_buf;
894 struct xdr_netobj mic;
895 u32 flav,len;
896 u32 maj_stat;
897
898 dprintk("RPC: %4u gss_validate\n", task->tk_pid);
899
900 flav = ntohl(*p++);
901 if ((len = ntohl(*p++)) > RPC_MAX_AUTH_SIZE)
902 goto out_bad;
903 if (flav != RPC_AUTH_GSS)
904 goto out_bad;
905 seq = htonl(task->tk_rqstp->rq_seqno);
906 iov.iov_base = &seq;
907 iov.iov_len = sizeof(seq);
908 xdr_buf_from_iov(&iov, &verf_buf);
909 mic.data = (u8 *)p;
910 mic.len = len;
911
912 maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &verf_buf, &mic, &qop_state);
913 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
914 cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE;
915 if (maj_stat)
916 goto out_bad;
24b2605b
BF		 917 /* We leave it to unwrap to calculate au_rslack. For now we just
918 * calculate the length of the verifier: */
919 task->tk_auth->au_verfsize = XDR_QUADLEN(len) + 2;
1da177e4
LT		 920 gss_put_ctx(ctx);
921 dprintk("RPC: %4u GSS gss_validate: gss_verify_mic succeeded.\n",
922 task->tk_pid);
923 return p + XDR_QUADLEN(len);
924out_bad:
925 gss_put_ctx(ctx);
926 dprintk("RPC: %4u gss_validate failed.\n", task->tk_pid);
927 return NULL;
928}
929
930static inline int
931gss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
932 kxdrproc_t encode, struct rpc_rqst *rqstp, u32 *p, void *obj)
933{
934 struct xdr_buf *snd_buf = &rqstp->rq_snd_buf;
935 struct xdr_buf integ_buf;
936 u32 *integ_len = NULL;
937 struct xdr_netobj mic;
938 u32 offset, *q;
939 struct kvec *iov;
940 u32 maj_stat = 0;
941 int status = -EIO;
942
943 integ_len = p++;
944 offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base;
945 *p++ = htonl(rqstp->rq_seqno);
946
947 status = encode(rqstp, p, obj);
948 if (status)
949 return status;
950
951 if (xdr_buf_subsegment(snd_buf, &integ_buf,
952 offset, snd_buf->len - offset))
953 return status;
954 *integ_len = htonl(integ_buf.len);
955
956 /* guess whether we're in the head or the tail: */
957 if (snd_buf->page_len || snd_buf->tail[0].iov_len)
958 iov = snd_buf->tail;
959 else
960 iov = snd_buf->head;
961 p = iov->iov_base + iov->iov_len;
962 mic.data = (u8 *)(p + 1);
963
964 maj_stat = gss_get_mic(ctx->gc_gss_ctx,
965 GSS_C_QOP_DEFAULT, &integ_buf, &mic);
966 status = -EIO; /* XXX? */
967 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
968 cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE;
969 else if (maj_stat)
970 return status;
971 q = xdr_encode_opaque(p, NULL, mic.len);
972
973 offset = (u8 *)q - (u8 *)p;
974 iov->iov_len += offset;
975 snd_buf->len += offset;
976 return 0;
977}
978
2d2da60c
BF		 979static void
980priv_release_snd_buf(struct rpc_rqst *rqstp)
981{
982 int i;
983
984 for (i=0; i < rqstp->rq_enc_pages_num; i++)
985 __free_page(rqstp->rq_enc_pages[i]);
986 kfree(rqstp->rq_enc_pages);
987}
988
989static int
990alloc_enc_pages(struct rpc_rqst *rqstp)
991{
992 struct xdr_buf *snd_buf = &rqstp->rq_snd_buf;
993 int first, last, i;
994
995 if (snd_buf->page_len == 0) {
996 rqstp->rq_enc_pages_num = 0;
997 return 0;
998 }
999
1000 first = snd_buf->page_base >> PAGE_CACHE_SHIFT;
1001 last = (snd_buf->page_base + snd_buf->page_len - 1) >> PAGE_CACHE_SHIFT;
1002 rqstp->rq_enc_pages_num = last - first + 1 + 1;
1003 rqstp->rq_enc_pages
1004 = kmalloc(rqstp->rq_enc_pages_num * sizeof(struct page *),
1005 GFP_NOFS);
1006 if (!rqstp->rq_enc_pages)
1007 goto out;
1008 for (i=0; i < rqstp->rq_enc_pages_num; i++) {
1009 rqstp->rq_enc_pages[i] = alloc_page(GFP_NOFS);
1010 if (rqstp->rq_enc_pages[i] == NULL)
1011 goto out_free;
1012 }
1013 rqstp->rq_release_snd_buf = priv_release_snd_buf;
1014 return 0;
1015out_free:
1016 for (i--; i >= 0; i--) {
1017 __free_page(rqstp->rq_enc_pages[i]);
1018 }
1019out:
1020 return -EAGAIN;
1021}
1022
1023static inline int
1024gss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
1025 kxdrproc_t encode, struct rpc_rqst *rqstp, u32 *p, void *obj)
1026{
1027 struct xdr_buf *snd_buf = &rqstp->rq_snd_buf;
1028 u32 offset;
1029 u32 maj_stat;
1030 int status;
1031 u32 *opaque_len;
1032 struct page **inpages;
1033 int first;
1034 int pad;
1035 struct kvec *iov;
1036 char *tmp;
1037
1038 opaque_len = p++;
1039 offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base;
1040 *p++ = htonl(rqstp->rq_seqno);
1041
1042 status = encode(rqstp, p, obj);
1043 if (status)
1044 return status;
1045
1046 status = alloc_enc_pages(rqstp);
1047 if (status)
1048 return status;
1049 first = snd_buf->page_base >> PAGE_CACHE_SHIFT;
1050 inpages = snd_buf->pages + first;
1051 snd_buf->pages = rqstp->rq_enc_pages;
1052 snd_buf->page_base -= first << PAGE_CACHE_SHIFT;
1053 /* Give the tail its own page, in case we need extra space in the
1054 * head when wrapping: */
1055 if (snd_buf->page_len || snd_buf->tail[0].iov_len) {
1056 tmp = page_address(rqstp->rq_enc_pages[rqstp->rq_enc_pages_num - 1]);
1057 memcpy(tmp, snd_buf->tail[0].iov_base, snd_buf->tail[0].iov_len);
1058 snd_buf->tail[0].iov_base = tmp;
1059 }
1060 maj_stat = gss_wrap(ctx->gc_gss_ctx, GSS_C_QOP_DEFAULT, offset,
1061 snd_buf, inpages);
1062 /* RPC_SLACK_SPACE should prevent this ever happening: */
1063 BUG_ON(snd_buf->len > snd_buf->buflen);
1064 status = -EIO;
1065 /* We're assuming that when GSS_S_CONTEXT_EXPIRED, the encryption was
1066 * done anyway, so it's safe to put the request on the wire: */
1067 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
1068 cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE;
1069 else if (maj_stat)
1070 return status;
1071
1072 *opaque_len = htonl(snd_buf->len - offset);
1073 /* guess whether we're in the head or the tail: */
1074 if (snd_buf->page_len || snd_buf->tail[0].iov_len)
1075 iov = snd_buf->tail;
1076 else
1077 iov = snd_buf->head;
1078 p = iov->iov_base + iov->iov_len;
1079 pad = 3 - ((snd_buf->len - offset - 1) & 3);
1080 memset(p, 0, pad);
1081 iov->iov_len += pad;
1082 snd_buf->len += pad;
1083
1084 return 0;
1085}
1086
1da177e4
LT		 1087static int
1088gss_wrap_req(struct rpc_task *task,
1089 kxdrproc_t encode, void *rqstp, u32 *p, void *obj)
1090{
1091 struct rpc_cred *cred = task->tk_msg.rpc_cred;
1092 struct gss_cred *gss_cred = container_of(cred, struct gss_cred,
1093 gc_base);
1094 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred);
1095 int status = -EIO;
1096
1097 dprintk("RPC: %4u gss_wrap_req\n", task->tk_pid);
1098 if (ctx->gc_proc != RPC_GSS_PROC_DATA) {
1099 /* The spec seems a little ambiguous here, but I think that not
1100 * wrapping context destruction requests makes the most sense.
1101 */
1102 status = encode(rqstp, p, obj);
1103 goto out;
1104 }
1105 switch (gss_cred->gc_service) {
1106 case RPC_GSS_SVC_NONE:
1107 status = encode(rqstp, p, obj);
1108 break;
1109 case RPC_GSS_SVC_INTEGRITY:
1110 status = gss_wrap_req_integ(cred, ctx, encode,
1111 rqstp, p, obj);
1112 break;
1113 case RPC_GSS_SVC_PRIVACY:
2d2da60c
BF		 1114 status = gss_wrap_req_priv(cred, ctx, encode,
1115 rqstp, p, obj);
1da177e4
LT		 1116 break;
1117 }
1118out:
1119 gss_put_ctx(ctx);
1120 dprintk("RPC: %4u gss_wrap_req returning %d\n", task->tk_pid, status);
1121 return status;
1122}
1123
1124static inline int
1125gss_unwrap_resp_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
1126 struct rpc_rqst *rqstp, u32 **p)
1127{
1128 struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf;
1129 struct xdr_buf integ_buf;
1130 struct xdr_netobj mic;
1131 u32 data_offset, mic_offset;
1132 u32 integ_len;
1133 u32 maj_stat;
1134 int status = -EIO;
1135
1136 integ_len = ntohl(*(*p)++);
1137 if (integ_len & 3)
1138 return status;
1139 data_offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base;
1140 mic_offset = integ_len + data_offset;
1141 if (mic_offset > rcv_buf->len)
1142 return status;
1143 if (ntohl(*(*p)++) != rqstp->rq_seqno)
1144 return status;
1145
1146 if (xdr_buf_subsegment(rcv_buf, &integ_buf, data_offset,
1147 mic_offset - data_offset))
1148 return status;
1149
1150 if (xdr_buf_read_netobj(rcv_buf, &mic, mic_offset))
1151 return status;
1152
1153 maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &integ_buf,
1154 &mic, NULL);
1155 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
1156 cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE;
1157 if (maj_stat != GSS_S_COMPLETE)
1158 return status;
1159 return 0;
1160}
1161
2d2da60c
BF		 1162static inline int
1163gss_unwrap_resp_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
1164 struct rpc_rqst *rqstp, u32 **p)
1165{
1166 struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf;
1167 u32 offset;
1168 u32 opaque_len;
1169 u32 maj_stat;
1170 int status = -EIO;
1171
1172 opaque_len = ntohl(*(*p)++);
1173 offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base;
1174 if (offset + opaque_len > rcv_buf->len)
1175 return status;
1176 /* remove padding: */
1177 rcv_buf->len = offset + opaque_len;
1178
1179 maj_stat = gss_unwrap(ctx->gc_gss_ctx, NULL,
1180 offset, rcv_buf);
1181 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
1182 cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE;
1183 if (maj_stat != GSS_S_COMPLETE)
1184 return status;
1185 if (ntohl(*(*p)++) != rqstp->rq_seqno)
1186 return status;
1187
1188 return 0;
1189}
1190
1191
1da177e4
LT		 1192static int
1193gss_unwrap_resp(struct rpc_task *task,
1194 kxdrproc_t decode, void *rqstp, u32 *p, void *obj)
1195{
1196 struct rpc_cred *cred = task->tk_msg.rpc_cred;
1197 struct gss_cred *gss_cred = container_of(cred, struct gss_cred,
1198 gc_base);
1199 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred);
24b2605b 1200 u32 *savedp = p;
2d2da60c
BF		 1201 struct kvec *head = ((struct rpc_rqst *)rqstp)->rq_rcv_buf.head;
1202 int savedlen = head->iov_len;
1da177e4
LT		 1203 int status = -EIO;
1204
1205 if (ctx->gc_proc != RPC_GSS_PROC_DATA)
1206 goto out_decode;
1207 switch (gss_cred->gc_service) {
1208 case RPC_GSS_SVC_NONE:
1209 break;
1210 case RPC_GSS_SVC_INTEGRITY:
1211 status = gss_unwrap_resp_integ(cred, ctx, rqstp, &p);
1212 if (status)
1213 goto out;
1214 break;
1215 case RPC_GSS_SVC_PRIVACY:
2d2da60c
BF		 1216 status = gss_unwrap_resp_priv(cred, ctx, rqstp, &p);
1217 if (status)
1218 goto out;
1da177e4
LT		 1219 break;
1220 }
24b2605b 1221 /* take into account extra slack for integrity and privacy cases: */
2d2da60c
BF		 1222 task->tk_auth->au_rslack = task->tk_auth->au_verfsize + (p - savedp)
1223 + (savedlen - head->iov_len);
1da177e4
LT		 1224out_decode:
1225 status = decode(rqstp, p, obj);
1226out:
1227 gss_put_ctx(ctx);
1228 dprintk("RPC: %4u gss_unwrap_resp returning %d\n", task->tk_pid,
1229 status);
1230 return status;
1231}
1232
1233static struct rpc_authops authgss_ops = {
1234 .owner = THIS_MODULE,
1235 .au_flavor = RPC_AUTH_GSS,
1236#ifdef RPC_DEBUG
1237 .au_name = "RPCSEC_GSS",
1238#endif
1239 .create = gss_create,
1240 .destroy = gss_destroy,
1241 .lookup_cred = gss_lookup_cred,
1242 .crcreate = gss_create_cred
1243};
1244
1245static struct rpc_credops gss_credops = {
1246 .cr_name = "AUTH_GSS",
1247 .crdestroy = gss_destroy_cred,
1248 .crmatch = gss_match,
1249 .crmarshal = gss_marshal,
1250 .crrefresh = gss_refresh,
1251 .crvalidate = gss_validate,
1252 .crwrap_req = gss_wrap_req,
1253 .crunwrap_resp = gss_unwrap_resp,
1254};
1255
1256static struct rpc_pipe_ops gss_upcall_ops = {
1257 .upcall = gss_pipe_upcall,
1258 .downcall = gss_pipe_downcall,
1259 .destroy_msg = gss_pipe_destroy_msg,
1260 .release_pipe = gss_pipe_release,
1261};
1262
1263/*
1264 * Initialize RPCSEC_GSS module
1265 */
1266static int __init init_rpcsec_gss(void)
1267{
1268 int err = 0;
1269
1270 err = rpcauth_register(&authgss_ops);
1271 if (err)
1272 goto out;
1273 err = gss_svc_init();
1274 if (err)
1275 goto out_unregister;
1276 return 0;
1277out_unregister:
1278 rpcauth_unregister(&authgss_ops);
1279out:
1280 return err;
1281}
1282
1283static void __exit exit_rpcsec_gss(void)
1284{
1285 gss_svc_shutdown();
1286 rpcauth_unregister(&authgss_ops);
1287}
1288
1289MODULE_LICENSE("GPL");
1290module_init(init_rpcsec_gss)
1291module_exit(exit_rpcsec_gss)
Linux 6.x block layer and io_uring tree(s)