2 * Modifications for Lustre
4 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
6 * Copyright (c) 2012, Intel Corporation.
8 * Author: Eric Mei <ericm@clusterfs.com>
12 * linux/net/sunrpc/auth_gss.c
14 * RPCSEC_GSS client authentication.
16 * Copyright (c) 2000 The Regents of the University of Michigan.
17 * All rights reserved.
19 * Dug Song <dugsong@monkey.org>
20 * Andy Adamson <andros@umich.edu>
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the above copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. Neither the name of the University nor the names of its
32 * contributors may be used to endorse or promote products derived
33 * from this software without specific prior written permission.
35 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
36 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
37 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
38 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
39 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
40 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
41 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
42 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
43 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
44 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
45 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
49 #define DEBUG_SUBSYSTEM S_SEC
50 #include <linux/init.h>
51 #include <linux/module.h>
52 #include <linux/slab.h>
53 #include <linux/dcache.h>
55 #include <linux/mutex.h>
56 #include <linux/crypto.h>
57 #include <asm/atomic.h>
58 struct rpc_clnt; /* for rpc_pipefs */
59 #include <linux/sunrpc/rpc_pipe_fs.h>
62 #include <obd_class.h>
63 #include <obd_support.h>
64 #include <lustre/lustre_idl.h>
65 #include <lustre_sec.h>
66 #include <lustre_net.h>
67 #include <lustre_import.h>
70 #include "gss_internal.h"
73 static struct ptlrpc_sec_policy gss_policy_pipefs;
74 static struct ptlrpc_ctx_ops gss_pipefs_ctxops;
76 static int gss_cli_ctx_refresh_pf(struct ptlrpc_cli_ctx *ctx);
78 static int gss_sec_pipe_upcall_init(struct gss_sec *gsec)
83 static void gss_sec_pipe_upcall_fini(struct gss_sec *gsec)
87 /****************************************
88 * internal context helpers *
89 ****************************************/
92 struct ptlrpc_cli_ctx *ctx_create_pf(struct ptlrpc_sec *sec,
93 struct vfs_cred *vcred)
95 struct gss_cli_ctx *gctx;
102 rc = gss_cli_ctx_init_common(sec, &gctx->gc_base,
103 &gss_pipefs_ctxops, vcred);
109 return &gctx->gc_base;
113 void ctx_destroy_pf(struct ptlrpc_sec *sec, struct ptlrpc_cli_ctx *ctx)
115 struct gss_cli_ctx *gctx = ctx2gctx(ctx);
117 if (gss_cli_ctx_fini_common(sec, ctx))
122 atomic_dec(&sec->ps_nctx);
123 sptlrpc_sec_put(sec);
127 void ctx_enhash_pf(struct ptlrpc_cli_ctx *ctx, struct hlist_head *hash)
129 set_bit(PTLRPC_CTX_CACHED_BIT, &ctx->cc_flags);
130 atomic_inc(&ctx->cc_refcount);
131 hlist_add_head(&ctx->cc_cache, hash);
135 * caller must hold spinlock
138 void ctx_unhash_pf(struct ptlrpc_cli_ctx *ctx, struct hlist_head *freelist)
140 assert_spin_locked(&ctx->cc_sec->ps_lock);
141 LASSERT(atomic_read(&ctx->cc_refcount) > 0);
142 LASSERT(test_bit(PTLRPC_CTX_CACHED_BIT, &ctx->cc_flags));
143 LASSERT(!hlist_unhashed(&ctx->cc_cache));
145 clear_bit(PTLRPC_CTX_CACHED_BIT, &ctx->cc_flags);
147 if (atomic_dec_and_test(&ctx->cc_refcount)) {
148 __hlist_del(&ctx->cc_cache);
149 hlist_add_head(&ctx->cc_cache, freelist);
151 hlist_del_init(&ctx->cc_cache);
156 * return 1 if the context is dead.
159 int ctx_check_death_pf(struct ptlrpc_cli_ctx *ctx,
160 struct hlist_head *freelist)
162 if (cli_ctx_check_death(ctx)) {
164 ctx_unhash_pf(ctx, freelist);
172 int ctx_check_death_locked_pf(struct ptlrpc_cli_ctx *ctx,
173 struct hlist_head *freelist)
175 LASSERT(ctx->cc_sec);
176 LASSERT(atomic_read(&ctx->cc_refcount) > 0);
177 LASSERT(test_bit(PTLRPC_CTX_CACHED_BIT, &ctx->cc_flags));
179 return ctx_check_death_pf(ctx, freelist);
183 int ctx_match_pf(struct ptlrpc_cli_ctx *ctx, struct vfs_cred *vcred)
185 /* a little bit optimization for null policy */
186 if (!ctx->cc_ops->match)
189 return ctx->cc_ops->match(ctx, vcred);
193 void ctx_list_destroy_pf(struct hlist_head *head)
195 struct ptlrpc_cli_ctx *ctx;
197 while (!hlist_empty(head)) {
198 ctx = hlist_entry(head->first, struct ptlrpc_cli_ctx,
201 LASSERT(atomic_read(&ctx->cc_refcount) == 0);
202 LASSERT(test_bit(PTLRPC_CTX_CACHED_BIT,
203 &ctx->cc_flags) == 0);
205 hlist_del_init(&ctx->cc_cache);
206 ctx_destroy_pf(ctx->cc_sec, ctx);
210 /****************************************
212 ****************************************/
215 int gss_cli_ctx_validate_pf(struct ptlrpc_cli_ctx *ctx)
217 if (ctx_check_death_pf(ctx, NULL))
219 if (cli_ctx_is_ready(ctx))
225 void gss_cli_ctx_die_pf(struct ptlrpc_cli_ctx *ctx, int grace)
227 LASSERT(ctx->cc_sec);
228 LASSERT(atomic_read(&ctx->cc_refcount) > 0);
232 spin_lock(&ctx->cc_sec->ps_lock);
234 if (test_and_clear_bit(PTLRPC_CTX_CACHED_BIT, &ctx->cc_flags)) {
235 LASSERT(!hlist_unhashed(&ctx->cc_cache));
236 LASSERT(atomic_read(&ctx->cc_refcount) > 1);
238 hlist_del_init(&ctx->cc_cache);
239 if (atomic_dec_and_test(&ctx->cc_refcount))
243 spin_unlock(&ctx->cc_sec->ps_lock);
246 /****************************************
247 * reverse context installation *
248 ****************************************/
251 unsigned int ctx_hash_index(int hashsize, __u64 key)
253 return (unsigned int) (key & ((__u64) hashsize - 1));
257 void gss_sec_ctx_replace_pf(struct gss_sec *gsec,
258 struct ptlrpc_cli_ctx *new)
260 struct gss_sec_pipefs *gsec_pf;
261 struct ptlrpc_cli_ctx *ctx;
262 struct hlist_node *next;
263 HLIST_HEAD(freelist);
266 gsec_pf = container_of(gsec, struct gss_sec_pipefs, gsp_base);
268 hash = ctx_hash_index(gsec_pf->gsp_chash_size,
269 (__u64) new->cc_vcred.vc_uid);
270 LASSERT(hash < gsec_pf->gsp_chash_size);
272 spin_lock(&gsec->gs_base.ps_lock);
274 hlist_for_each_entry_safe(ctx, next,
275 &gsec_pf->gsp_chash[hash], cc_cache) {
276 if (!ctx_match_pf(ctx, &new->cc_vcred))
280 ctx_unhash_pf(ctx, &freelist);
284 ctx_enhash_pf(new, &gsec_pf->gsp_chash[hash]);
286 spin_unlock(&gsec->gs_base.ps_lock);
288 ctx_list_destroy_pf(&freelist);
292 int gss_install_rvs_cli_ctx_pf(struct gss_sec *gsec,
293 struct ptlrpc_svc_ctx *svc_ctx)
295 struct vfs_cred vcred;
296 struct ptlrpc_cli_ctx *cli_ctx;
302 cli_ctx = ctx_create_pf(&gsec->gs_base, &vcred);
306 rc = gss_copy_rvc_cli_ctx(cli_ctx, svc_ctx);
308 ctx_destroy_pf(cli_ctx->cc_sec, cli_ctx);
312 gss_sec_ctx_replace_pf(gsec, cli_ctx);
317 void gss_ctx_cache_gc_pf(struct gss_sec_pipefs *gsec_pf,
318 struct hlist_head *freelist)
320 struct ptlrpc_sec *sec;
321 struct ptlrpc_cli_ctx *ctx;
322 struct hlist_node *next;
325 sec = &gsec_pf->gsp_base.gs_base;
327 CDEBUG(D_SEC, "do gc on sec %s@%p\n", sec->ps_policy->sp_name, sec);
329 for (i = 0; i < gsec_pf->gsp_chash_size; i++) {
330 hlist_for_each_entry_safe(ctx, next,
331 &gsec_pf->gsp_chash[i], cc_cache)
332 ctx_check_death_locked_pf(ctx, freelist);
335 sec->ps_gc_next = cfs_time_current_sec() + sec->ps_gc_interval;
339 struct ptlrpc_sec* gss_sec_create_pf(struct obd_import *imp,
340 struct ptlrpc_svc_ctx *ctx,
341 struct sptlrpc_flavor *sf)
343 struct gss_sec_pipefs *gsec_pf;
344 int alloc_size, hash_size, i;
346 #define GSS_SEC_PIPEFS_CTX_HASH_SIZE (32)
349 sf->sf_flags & (PTLRPC_SEC_FL_ROOTONLY | PTLRPC_SEC_FL_REVERSE))
352 hash_size = GSS_SEC_PIPEFS_CTX_HASH_SIZE;
354 alloc_size = sizeof(*gsec_pf) +
355 sizeof(struct hlist_head) * hash_size;
357 OBD_ALLOC(gsec_pf, alloc_size);
361 gsec_pf->gsp_chash_size = hash_size;
362 for (i = 0; i < hash_size; i++)
363 INIT_HLIST_HEAD(&gsec_pf->gsp_chash[i]);
365 if (gss_sec_create_common(&gsec_pf->gsp_base, &gss_policy_pipefs,
370 if (gss_sec_pipe_upcall_init(&gsec_pf->gsp_base))
373 if (gss_install_rvs_cli_ctx_pf(&gsec_pf->gsp_base, ctx))
377 return &gsec_pf->gsp_base.gs_base;
380 gss_sec_destroy_common(&gsec_pf->gsp_base);
382 OBD_FREE(gsec_pf, alloc_size);
387 void gss_sec_destroy_pf(struct ptlrpc_sec *sec)
389 struct gss_sec_pipefs *gsec_pf;
390 struct gss_sec *gsec;
392 CWARN("destroy %s@%p\n", sec->ps_policy->sp_name, sec);
394 gsec = container_of(sec, struct gss_sec, gs_base);
395 gsec_pf = container_of(gsec, struct gss_sec_pipefs, gsp_base);
397 LASSERT(gsec_pf->gsp_chash);
398 LASSERT(gsec_pf->gsp_chash_size);
400 gss_sec_pipe_upcall_fini(gsec);
402 gss_sec_destroy_common(gsec);
404 OBD_FREE(gsec, sizeof(*gsec_pf) +
405 sizeof(struct hlist_head) * gsec_pf->gsp_chash_size);
409 struct ptlrpc_cli_ctx * gss_sec_lookup_ctx_pf(struct ptlrpc_sec *sec,
410 struct vfs_cred *vcred,
411 int create, int remove_dead)
413 struct gss_sec *gsec;
414 struct gss_sec_pipefs *gsec_pf;
415 struct ptlrpc_cli_ctx *ctx = NULL, *new = NULL;
416 struct hlist_head *hash_head;
417 struct hlist_node *next;
418 HLIST_HEAD(freelist);
419 unsigned int hash, gc = 0, found = 0;
423 gsec = container_of(sec, struct gss_sec, gs_base);
424 gsec_pf = container_of(gsec, struct gss_sec_pipefs, gsp_base);
426 hash = ctx_hash_index(gsec_pf->gsp_chash_size,
427 (__u64) vcred->vc_uid);
428 hash_head = &gsec_pf->gsp_chash[hash];
429 LASSERT(hash < gsec_pf->gsp_chash_size);
432 spin_lock(&sec->ps_lock);
434 /* gc_next == 0 means never do gc */
435 if (remove_dead && sec->ps_gc_next &&
436 cfs_time_after(cfs_time_current_sec(), sec->ps_gc_next)) {
437 gss_ctx_cache_gc_pf(gsec_pf, &freelist);
441 hlist_for_each_entry_safe(ctx, next, hash_head, cc_cache) {
443 ctx_check_death_locked_pf(ctx,
444 remove_dead ? &freelist : NULL))
447 if (ctx_match_pf(ctx, vcred)) {
454 if (new && new != ctx) {
455 /* lost the race, just free it */
456 hlist_add_head(&new->cc_cache, &freelist);
460 /* hot node, move to head */
461 if (hash_head->first != &ctx->cc_cache) {
462 __hlist_del(&ctx->cc_cache);
463 hlist_add_head(&ctx->cc_cache, hash_head);
466 /* don't allocate for reverse sec */
467 if (sec_is_reverse(sec)) {
468 spin_unlock(&sec->ps_lock);
473 ctx_enhash_pf(new, hash_head);
476 spin_unlock(&sec->ps_lock);
477 new = ctx_create_pf(sec, vcred);
479 clear_bit(PTLRPC_CTX_NEW_BIT, &new->cc_flags);
489 atomic_inc(&ctx->cc_refcount);
491 spin_unlock(&sec->ps_lock);
493 /* the allocator of the context must give the first push to refresh */
496 gss_cli_ctx_refresh_pf(new);
499 ctx_list_destroy_pf(&freelist);
504 void gss_sec_release_ctx_pf(struct ptlrpc_sec *sec,
505 struct ptlrpc_cli_ctx *ctx,
508 LASSERT(test_bit(PTLRPC_CTX_CACHED_BIT, &ctx->cc_flags) == 0);
509 LASSERT(hlist_unhashed(&ctx->cc_cache));
511 /* if required async, we must clear the UPTODATE bit to prevent extra
512 * rpcs during destroy procedure. */
514 clear_bit(PTLRPC_CTX_UPTODATE_BIT, &ctx->cc_flags);
516 /* destroy this context */
517 ctx_destroy_pf(sec, ctx);
521 * @uid: which user. "-1" means flush all.
522 * @grace: mark context DEAD, allow graceful destroy like notify
524 * @force: also flush busy entries.
526 * return the number of busy context encountered.
528 * In any cases, never touch "eternal" contexts.
531 int gss_sec_flush_ctx_cache_pf(struct ptlrpc_sec *sec,
533 int grace, int force)
535 struct gss_sec *gsec;
536 struct gss_sec_pipefs *gsec_pf;
537 struct ptlrpc_cli_ctx *ctx;
538 struct hlist_node *next;
539 HLIST_HEAD(freelist);
542 might_sleep_if(grace);
544 gsec = container_of(sec, struct gss_sec, gs_base);
545 gsec_pf = container_of(gsec, struct gss_sec_pipefs, gsp_base);
547 spin_lock(&sec->ps_lock);
548 for (i = 0; i < gsec_pf->gsp_chash_size; i++) {
549 hlist_for_each_entry_safe(ctx, next,
550 &gsec_pf->gsp_chash[i],
552 LASSERT(atomic_read(&ctx->cc_refcount) > 0);
554 if (uid != -1 && uid != ctx->cc_vcred.vc_uid)
557 if (atomic_read(&ctx->cc_refcount) > 1) {
562 CWARN("flush busy(%d) ctx %p(%u->%s) by force, "
564 atomic_read(&ctx->cc_refcount),
565 ctx, ctx->cc_vcred.vc_uid,
566 sec2target_str(ctx->cc_sec), grace);
568 ctx_unhash_pf(ctx, &freelist);
570 set_bit(PTLRPC_CTX_DEAD_BIT, &ctx->cc_flags);
572 clear_bit(PTLRPC_CTX_UPTODATE_BIT,
576 spin_unlock(&sec->ps_lock);
578 ctx_list_destroy_pf(&freelist);
582 /****************************************
584 ****************************************/
587 int gss_svc_accept_pf(struct ptlrpc_request *req)
589 return gss_svc_accept(&gss_policy_pipefs, req);
593 int gss_svc_install_rctx_pf(struct obd_import *imp,
594 struct ptlrpc_svc_ctx *ctx)
596 struct ptlrpc_sec *sec;
599 sec = sptlrpc_import_sec_ref(imp);
601 rc = gss_install_rvs_cli_ctx_pf(sec2gsec(sec), ctx);
603 sptlrpc_sec_put(sec);
607 /****************************************
608 * rpc_pipefs definitions *
609 ****************************************/
611 #define LUSTRE_PIPE_ROOT "/lustre"
612 #define LUSTRE_PIPE_KRB5 LUSTRE_PIPE_ROOT"/krb5"
614 struct gss_upcall_msg_data {
618 __u32 gum_svc; /* MDS/OSS... */
619 __u64 gum_nid; /* peer NID */
620 __u8 gum_obd[64]; /* client obd name */
623 struct gss_upcall_msg {
624 struct rpc_pipe_msg gum_base;
625 atomic_t gum_refcount;
626 struct list_head gum_list;
628 struct gss_sec *gum_gsec;
629 struct gss_cli_ctx *gum_gctx;
630 struct gss_upcall_msg_data gum_data;
633 static atomic_t upcall_seq = ATOMIC_INIT(0);
636 __u32 upcall_get_sequence(void)
638 return (__u32) atomic_inc_return(&upcall_seq);
647 __u32 mech_name2idx(const char *name)
649 LASSERT(!strcmp(name, "krb5"));
653 /* pipefs dentries for each mechanisms */
654 static struct dentry *de_pipes[MECH_MAX] = { NULL, };
655 /* all upcall messages linked here */
656 static struct list_head upcall_lists[MECH_MAX];
657 /* and protected by this */
658 static spinlock_t upcall_locks[MECH_MAX];
661 void upcall_list_lock(int idx)
663 spin_lock(&upcall_locks[idx]);
667 void upcall_list_unlock(int idx)
669 spin_unlock(&upcall_locks[idx]);
673 void upcall_msg_enlist(struct gss_upcall_msg *msg)
675 __u32 idx = msg->gum_mechidx;
677 upcall_list_lock(idx);
678 list_add(&msg->gum_list, &upcall_lists[idx]);
679 upcall_list_unlock(idx);
683 void upcall_msg_delist(struct gss_upcall_msg *msg)
685 __u32 idx = msg->gum_mechidx;
687 upcall_list_lock(idx);
688 list_del_init(&msg->gum_list);
689 upcall_list_unlock(idx);
692 /****************************************
693 * rpc_pipefs upcall helpers *
694 ****************************************/
697 void gss_release_msg(struct gss_upcall_msg *gmsg)
699 LASSERT(atomic_read(&gmsg->gum_refcount) > 0);
701 if (!atomic_dec_and_test(&gmsg->gum_refcount)) {
705 if (gmsg->gum_gctx) {
706 sptlrpc_cli_ctx_wakeup(&gmsg->gum_gctx->gc_base);
707 sptlrpc_cli_ctx_put(&gmsg->gum_gctx->gc_base, 1);
708 gmsg->gum_gctx = NULL;
711 LASSERT(list_empty(&gmsg->gum_list));
712 LASSERT(list_empty(&gmsg->gum_base.list));
717 void gss_unhash_msg_nolock(struct gss_upcall_msg *gmsg)
719 __u32 idx = gmsg->gum_mechidx;
721 LASSERT(idx < MECH_MAX);
722 assert_spin_locked(&upcall_locks[idx]);
724 if (list_empty(&gmsg->gum_list))
727 list_del_init(&gmsg->gum_list);
728 LASSERT(atomic_read(&gmsg->gum_refcount) > 1);
729 atomic_dec(&gmsg->gum_refcount);
733 void gss_unhash_msg(struct gss_upcall_msg *gmsg)
735 __u32 idx = gmsg->gum_mechidx;
737 LASSERT(idx < MECH_MAX);
738 upcall_list_lock(idx);
739 gss_unhash_msg_nolock(gmsg);
740 upcall_list_unlock(idx);
744 void gss_msg_fail_ctx(struct gss_upcall_msg *gmsg)
746 if (gmsg->gum_gctx) {
747 struct ptlrpc_cli_ctx *ctx = &gmsg->gum_gctx->gc_base;
749 LASSERT(atomic_read(&ctx->cc_refcount) > 0);
750 sptlrpc_cli_ctx_expire(ctx);
751 set_bit(PTLRPC_CTX_ERROR_BIT, &ctx->cc_flags);
756 struct gss_upcall_msg * gss_find_upcall(__u32 mechidx, __u32 seq)
758 struct gss_upcall_msg *gmsg;
760 upcall_list_lock(mechidx);
761 list_for_each_entry(gmsg, &upcall_lists[mechidx], gum_list) {
762 if (gmsg->gum_data.gum_seq != seq)
765 LASSERT(atomic_read(&gmsg->gum_refcount) > 0);
766 LASSERT(gmsg->gum_mechidx == mechidx);
768 atomic_inc(&gmsg->gum_refcount);
769 upcall_list_unlock(mechidx);
772 upcall_list_unlock(mechidx);
777 int simple_get_bytes(char **buf, __u32 *buflen, void *res, __u32 reslen)
779 if (*buflen < reslen) {
780 CERROR("buflen %u < %u\n", *buflen, reslen);
784 memcpy(res, *buf, reslen);
790 /****************************************
792 ****************************************/
795 ssize_t gss_pipe_upcall(struct file *filp, struct rpc_pipe_msg *msg,
796 char *dst, size_t buflen)
798 char *data = (char *)msg->data + msg->copied;
799 ssize_t mlen = msg->len;
804 left = copy_to_user(dst, data, mlen);
816 ssize_t gss_pipe_downcall(struct file *filp, const char *src, size_t mlen)
818 struct rpc_inode *rpci = RPC_I(filp->f_dentry->d_inode);
819 struct gss_upcall_msg *gss_msg;
820 struct ptlrpc_cli_ctx *ctx;
821 struct gss_cli_ctx *gctx = NULL;
825 __u32 mechidx, seq, gss_err;
827 mechidx = (__u32) (long) rpci->private;
828 LASSERT(mechidx < MECH_MAX);
830 OBD_ALLOC(buf, mlen);
834 if (copy_from_user(buf, src, mlen)) {
835 CERROR("failed copy user space data\n");
836 GOTO(out_free, rc = -EFAULT);
841 /* data passed down format:
845 * - wire_ctx (rawobj)
846 * - mech_ctx (rawobj)
848 if (simple_get_bytes(&data, &datalen, &seq, sizeof(seq))) {
849 CERROR("fail to get seq\n");
850 GOTO(out_free, rc = -EFAULT);
853 gss_msg = gss_find_upcall(mechidx, seq);
855 CERROR("upcall %u has aborted earlier\n", seq);
856 GOTO(out_free, rc = -EINVAL);
859 gss_unhash_msg(gss_msg);
860 gctx = gss_msg->gum_gctx;
862 LASSERT(atomic_read(&gctx->gc_base.cc_refcount) > 0);
864 /* timeout is not in use for now */
865 if (simple_get_bytes(&data, &datalen, &timeout, sizeof(timeout)))
866 GOTO(out_msg, rc = -EFAULT);
868 /* lgssd signal an error by gc_win == 0 */
869 if (simple_get_bytes(&data, &datalen, &gctx->gc_win,
870 sizeof(gctx->gc_win)))
871 GOTO(out_msg, rc = -EFAULT);
873 if (gctx->gc_win == 0) {
878 if (simple_get_bytes(&data, &datalen, &rc, sizeof(rc)))
879 GOTO(out_msg, rc = -EFAULT);
880 if (simple_get_bytes(&data, &datalen, &gss_err,sizeof(gss_err)))
881 GOTO(out_msg, rc = -EFAULT);
883 if (rc == 0 && gss_err == GSS_S_COMPLETE) {
884 CWARN("both rpc & gss error code not set\n");
891 if (rawobj_extract_local(&tmpobj, (__u32 **) &data, &datalen))
892 GOTO(out_msg, rc = -EFAULT);
893 if (rawobj_dup(&gctx->gc_handle, &tmpobj))
894 GOTO(out_msg, rc = -ENOMEM);
897 if (rawobj_extract_local(&tmpobj, (__u32 **) &data, &datalen))
898 GOTO(out_msg, rc = -EFAULT);
899 gss_err = lgss_import_sec_context(&tmpobj,
900 gss_msg->gum_gsec->gs_mech,
905 if (likely(rc == 0 && gss_err == GSS_S_COMPLETE)) {
906 gss_cli_ctx_uptodate(gctx);
908 ctx = &gctx->gc_base;
909 sptlrpc_cli_ctx_expire(ctx);
910 if (rc != -ERESTART || gss_err != GSS_S_COMPLETE)
911 set_bit(PTLRPC_CTX_ERROR_BIT, &ctx->cc_flags);
913 CERROR("refresh ctx %p(uid %d) failed: %d/0x%08x: %s\n",
914 ctx, ctx->cc_vcred.vc_uid, rc, gss_err,
915 test_bit(PTLRPC_CTX_ERROR_BIT, &ctx->cc_flags) ?
916 "fatal error" : "non-fatal");
922 gss_release_msg(gss_msg);
927 * hack pipefs: always return asked length unless all following
928 * downcalls might be messed up. */
934 void gss_pipe_destroy_msg(struct rpc_pipe_msg *msg)
936 struct gss_upcall_msg *gmsg;
937 struct gss_upcall_msg_data *gumd;
938 static cfs_time_t ratelimit = 0;
940 LASSERT(list_empty(&msg->list));
942 /* normally errno is >= 0 */
943 if (msg->errno >= 0) {
947 gmsg = container_of(msg, struct gss_upcall_msg, gum_base);
948 gumd = &gmsg->gum_data;
949 LASSERT(atomic_read(&gmsg->gum_refcount) > 0);
951 CERROR("failed msg %p (seq %u, uid %u, svc %u, nid "LPX64", obd %.*s): "
952 "errno %d\n", msg, gumd->gum_seq, gumd->gum_uid, gumd->gum_svc,
953 gumd->gum_nid, (int) sizeof(gumd->gum_obd),
954 gumd->gum_obd, msg->errno);
956 atomic_inc(&gmsg->gum_refcount);
957 gss_unhash_msg(gmsg);
958 if (msg->errno == -ETIMEDOUT || msg->errno == -EPIPE) {
959 cfs_time_t now = cfs_time_current_sec();
961 if (cfs_time_after(now, ratelimit)) {
962 CWARN("upcall timed out, is lgssd running?\n");
963 ratelimit = now + 15;
966 gss_msg_fail_ctx(gmsg);
967 gss_release_msg(gmsg);
971 void gss_pipe_release(struct inode *inode)
973 struct rpc_inode *rpci = RPC_I(inode);
976 idx = (__u32) (long) rpci->private;
977 LASSERT(idx < MECH_MAX);
979 upcall_list_lock(idx);
980 while (!list_empty(&upcall_lists[idx])) {
981 struct gss_upcall_msg *gmsg;
982 struct gss_upcall_msg_data *gumd;
984 gmsg = list_entry(upcall_lists[idx].next,
985 struct gss_upcall_msg, gum_list);
986 gumd = &gmsg->gum_data;
987 LASSERT(list_empty(&gmsg->gum_base.list));
989 CERROR("failing remaining msg %p:seq %u, uid %u, svc %u, "
990 "nid "LPX64", obd %.*s\n", gmsg,
991 gumd->gum_seq, gumd->gum_uid, gumd->gum_svc,
992 gumd->gum_nid, (int) sizeof(gumd->gum_obd),
995 gmsg->gum_base.errno = -EPIPE;
996 atomic_inc(&gmsg->gum_refcount);
997 gss_unhash_msg_nolock(gmsg);
999 gss_msg_fail_ctx(gmsg);
1001 upcall_list_unlock(idx);
1002 gss_release_msg(gmsg);
1003 upcall_list_lock(idx);
1005 upcall_list_unlock(idx);
1008 static struct rpc_pipe_ops gss_upcall_ops = {
1009 .upcall = gss_pipe_upcall,
1010 .downcall = gss_pipe_downcall,
1011 .destroy_msg = gss_pipe_destroy_msg,
1012 .release_pipe = gss_pipe_release,
1015 /****************************************
1016 * upcall helper functions *
1017 ****************************************/
1020 int gss_ctx_refresh_pf(struct ptlrpc_cli_ctx *ctx)
1022 struct obd_import *imp;
1023 struct gss_sec *gsec;
1024 struct gss_upcall_msg *gmsg;
1029 LASSERT(ctx->cc_sec);
1030 LASSERT(ctx->cc_sec->ps_import);
1031 LASSERT(ctx->cc_sec->ps_import->imp_obd);
1033 imp = ctx->cc_sec->ps_import;
1034 if (!imp->imp_connection) {
1035 CERROR("import has no connection set\n");
1039 gsec = container_of(ctx->cc_sec, struct gss_sec, gs_base);
1041 OBD_ALLOC_PTR(gmsg);
1045 /* initialize pipefs base msg */
1046 INIT_LIST_HEAD(&gmsg->gum_base.list);
1047 gmsg->gum_base.data = &gmsg->gum_data;
1048 gmsg->gum_base.len = sizeof(gmsg->gum_data);
1049 gmsg->gum_base.copied = 0;
1050 gmsg->gum_base.errno = 0;
1052 /* init upcall msg */
1053 atomic_set(&gmsg->gum_refcount, 1);
1054 gmsg->gum_mechidx = mech_name2idx(gsec->gs_mech->gm_name);
1055 gmsg->gum_gsec = gsec;
1056 gmsg->gum_gctx = container_of(sptlrpc_cli_ctx_get(ctx),
1057 struct gss_cli_ctx, gc_base);
1058 gmsg->gum_data.gum_seq = upcall_get_sequence();
1059 gmsg->gum_data.gum_uid = ctx->cc_vcred.vc_uid;
1060 gmsg->gum_data.gum_gid = 0; /* not used for now */
1061 gmsg->gum_data.gum_svc = import_to_gss_svc(imp);
1062 gmsg->gum_data.gum_nid = imp->imp_connection->c_peer.nid;
1063 strncpy(gmsg->gum_data.gum_obd, imp->imp_obd->obd_name,
1064 sizeof(gmsg->gum_data.gum_obd));
1066 /* This only could happen when sysadmin set it dead/expired
1067 * using lctl by force. */
1068 if (ctx->cc_flags & PTLRPC_CTX_STATUS_MASK) {
1069 CWARN("ctx %p(%u->%s) was set flags %lx unexpectedly\n",
1070 ctx, ctx->cc_vcred.vc_uid, sec2target_str(ctx->cc_sec),
1073 LASSERT(!(ctx->cc_flags & PTLRPC_CTX_UPTODATE));
1074 ctx->cc_flags |= PTLRPC_CTX_DEAD | PTLRPC_CTX_ERROR;
1080 upcall_msg_enlist(gmsg);
1082 rc = rpc_queue_upcall(de_pipes[gmsg->gum_mechidx]->d_inode,
1085 CERROR("rpc_queue_upcall failed: %d\n", rc);
1087 upcall_msg_delist(gmsg);
1098 int gss_cli_ctx_refresh_pf(struct ptlrpc_cli_ctx *ctx)
1100 /* if we are refreshing for root, also update the reverse
1101 * handle index, do not confuse reverse contexts. */
1102 if (ctx->cc_vcred.vc_uid == 0) {
1103 struct gss_sec *gsec;
1105 gsec = container_of(ctx->cc_sec, struct gss_sec, gs_base);
1106 gsec->gs_rvs_hdl = gss_get_next_ctx_index();
1109 return gss_ctx_refresh_pf(ctx);
1112 /****************************************
1113 * lustre gss pipefs policy *
1114 ****************************************/
1116 static struct ptlrpc_ctx_ops gss_pipefs_ctxops = {
1117 .match = gss_cli_ctx_match,
1118 .refresh = gss_cli_ctx_refresh_pf,
1119 .validate = gss_cli_ctx_validate_pf,
1120 .die = gss_cli_ctx_die_pf,
1121 .sign = gss_cli_ctx_sign,
1122 .verify = gss_cli_ctx_verify,
1123 .seal = gss_cli_ctx_seal,
1124 .unseal = gss_cli_ctx_unseal,
1125 .wrap_bulk = gss_cli_ctx_wrap_bulk,
1126 .unwrap_bulk = gss_cli_ctx_unwrap_bulk,
1129 static struct ptlrpc_sec_cops gss_sec_pipefs_cops = {
1130 .create_sec = gss_sec_create_pf,
1131 .destroy_sec = gss_sec_destroy_pf,
1132 .kill_sec = gss_sec_kill,
1133 .lookup_ctx = gss_sec_lookup_ctx_pf,
1134 .release_ctx = gss_sec_release_ctx_pf,
1135 .flush_ctx_cache = gss_sec_flush_ctx_cache_pf,
1136 .install_rctx = gss_sec_install_rctx,
1137 .alloc_reqbuf = gss_alloc_reqbuf,
1138 .free_reqbuf = gss_free_reqbuf,
1139 .alloc_repbuf = gss_alloc_repbuf,
1140 .free_repbuf = gss_free_repbuf,
1141 .enlarge_reqbuf = gss_enlarge_reqbuf,
1144 static struct ptlrpc_sec_sops gss_sec_pipefs_sops = {
1145 .accept = gss_svc_accept_pf,
1146 .invalidate_ctx = gss_svc_invalidate_ctx,
1147 .alloc_rs = gss_svc_alloc_rs,
1148 .authorize = gss_svc_authorize,
1149 .free_rs = gss_svc_free_rs,
1150 .free_ctx = gss_svc_free_ctx,
1151 .unwrap_bulk = gss_svc_unwrap_bulk,
1152 .wrap_bulk = gss_svc_wrap_bulk,
1153 .install_rctx = gss_svc_install_rctx_pf,
1156 static struct ptlrpc_sec_policy gss_policy_pipefs = {
1157 .sp_owner = THIS_MODULE,
1158 .sp_name = "gss.pipefs",
1159 .sp_policy = SPTLRPC_POLICY_GSS_PIPEFS,
1160 .sp_cops = &gss_sec_pipefs_cops,
1161 .sp_sops = &gss_sec_pipefs_sops,
1165 int __init gss_init_pipefs_upcall(void)
1170 de = rpc_mkdir(LUSTRE_PIPE_ROOT, NULL);
1171 if (IS_ERR(de) && PTR_ERR(de) != -EEXIST) {
1172 CERROR("Failed to create gss pipe dir: %ld\n", PTR_ERR(de));
1176 /* FIXME hack pipefs: dput will sometimes cause oops during module
1177 * unload and lgssd close the pipe fds. */
1179 /* krb5 mechanism */
1180 de = rpc_mkpipe(LUSTRE_PIPE_KRB5, (void *) MECH_KRB5, &gss_upcall_ops,
1181 RPC_PIPE_WAIT_FOR_OPEN);
1182 if (!de || IS_ERR(de)) {
1183 CERROR("failed to make rpc_pipe %s: %ld\n",
1184 LUSTRE_PIPE_KRB5, PTR_ERR(de));
1185 rpc_rmdir(LUSTRE_PIPE_ROOT);
1189 de_pipes[MECH_KRB5] = de;
1190 INIT_LIST_HEAD(&upcall_lists[MECH_KRB5]);
1191 spin_lock_init(&upcall_locks[MECH_KRB5]);
1197 void __exit gss_exit_pipefs_upcall(void)
1201 for (i = 0; i < MECH_MAX; i++) {
1202 LASSERT(list_empty(&upcall_lists[i]));
1204 /* dput pipe dentry here might cause lgssd oops. */
1208 rpc_unlink(LUSTRE_PIPE_KRB5);
1209 rpc_rmdir(LUSTRE_PIPE_ROOT);
1212 int __init gss_init_pipefs(void)
1216 rc = gss_init_pipefs_upcall();
1220 rc = sptlrpc_register_policy(&gss_policy_pipefs);
1222 gss_exit_pipefs_upcall();
1229 void __exit gss_exit_pipefs(void)
1231 gss_exit_pipefs_upcall();
1232 sptlrpc_unregister_policy(&gss_policy_pipefs);