1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Modifications for Lustre
6 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
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.
50 # define EXPORT_SYMTAB
52 #define DEBUG_SUBSYSTEM S_SEC
54 #include <linux/init.h>
55 #include <linux/module.h>
56 #include <linux/slab.h>
57 #include <linux/dcache.h>
59 #include <linux/random.h>
60 #include <linux/mutex.h>
61 #include <linux/crypto.h>
62 #include <asm/atomic.h>
63 struct rpc_clnt; /* for rpc_pipefs */
64 #include <linux/sunrpc/rpc_pipe_fs.h>
66 #include <liblustre.h>
70 #include <obd_class.h>
71 #include <obd_support.h>
72 #include <lustre/lustre_idl.h>
73 #include <lustre_sec.h>
74 #include <lustre_net.h>
75 #include <lustre_import.h>
78 #include "gss_internal.h"
81 static struct ptlrpc_sec_policy gss_policy_pipefs;
82 static struct ptlrpc_ctx_ops gss_pipefs_ctxops;
84 static int gss_cli_ctx_refresh_pf(struct ptlrpc_cli_ctx *ctx);
86 static int gss_sec_pipe_upcall_init(struct gss_sec *gsec)
91 static void gss_sec_pipe_upcall_fini(struct gss_sec *gsec)
95 /****************************************
96 * internel context helpers *
97 ****************************************/
100 struct ptlrpc_cli_ctx *ctx_create_pf(struct ptlrpc_sec *sec,
101 struct vfs_cred *vcred)
103 struct gss_cli_ctx *gctx;
110 rc = gss_cli_ctx_init_common(sec, &gctx->gc_base,
111 &gss_pipefs_ctxops, vcred);
117 return &gctx->gc_base;
121 void ctx_destroy_pf(struct ptlrpc_sec *sec, struct ptlrpc_cli_ctx *ctx)
123 struct gss_cli_ctx *gctx = ctx2gctx(ctx);
125 if (gss_cli_ctx_fini_common(sec, ctx))
130 atomic_dec(&sec->ps_nctx);
131 sptlrpc_sec_put(sec);
135 void ctx_enhash_pf(struct ptlrpc_cli_ctx *ctx, struct hlist_head *hash)
137 set_bit(PTLRPC_CTX_CACHED_BIT, &ctx->cc_flags);
138 atomic_inc(&ctx->cc_refcount);
139 hlist_add_head(&ctx->cc_cache, hash);
143 * caller must hold spinlock
146 void ctx_unhash_pf(struct ptlrpc_cli_ctx *ctx, struct hlist_head *freelist)
148 LASSERT_SPIN_LOCKED(&ctx->cc_sec->ps_lock);
149 LASSERT(atomic_read(&ctx->cc_refcount) > 0);
150 LASSERT(test_bit(PTLRPC_CTX_CACHED_BIT, &ctx->cc_flags));
151 LASSERT(!hlist_unhashed(&ctx->cc_cache));
153 clear_bit(PTLRPC_CTX_CACHED_BIT, &ctx->cc_flags);
155 if (atomic_dec_and_test(&ctx->cc_refcount)) {
156 __hlist_del(&ctx->cc_cache);
157 hlist_add_head(&ctx->cc_cache, freelist);
159 hlist_del_init(&ctx->cc_cache);
164 * return 1 if the context is dead.
167 int ctx_check_death_pf(struct ptlrpc_cli_ctx *ctx, struct hlist_head *freelist)
169 if (cli_ctx_check_death(ctx)) {
171 ctx_unhash_pf(ctx, freelist);
179 int ctx_check_death_locked_pf(struct ptlrpc_cli_ctx *ctx,
180 struct hlist_head *freelist)
182 LASSERT(ctx->cc_sec);
183 LASSERT(atomic_read(&ctx->cc_refcount) > 0);
184 LASSERT(test_bit(PTLRPC_CTX_CACHED_BIT, &ctx->cc_flags));
186 return ctx_check_death_pf(ctx, freelist);
190 int ctx_match_pf(struct ptlrpc_cli_ctx *ctx, struct vfs_cred *vcred)
192 /* a little bit optimization for null policy */
193 if (!ctx->cc_ops->match)
196 return ctx->cc_ops->match(ctx, vcred);
200 void ctx_list_destroy_pf(struct hlist_head *head)
202 struct ptlrpc_cli_ctx *ctx;
204 while (!hlist_empty(head)) {
205 ctx = hlist_entry(head->first, struct ptlrpc_cli_ctx, cc_cache);
207 LASSERT(atomic_read(&ctx->cc_refcount) == 0);
208 LASSERT(test_bit(PTLRPC_CTX_CACHED_BIT, &ctx->cc_flags) == 0);
210 hlist_del_init(&ctx->cc_cache);
211 ctx_destroy_pf(ctx->cc_sec, ctx);
215 /****************************************
217 ****************************************/
220 int gss_cli_ctx_validate_pf(struct ptlrpc_cli_ctx *ctx)
222 if (ctx_check_death_pf(ctx, NULL))
224 if (cli_ctx_is_ready(ctx))
230 void gss_cli_ctx_die_pf(struct ptlrpc_cli_ctx *ctx, int grace)
232 LASSERT(ctx->cc_sec);
233 LASSERT(atomic_read(&ctx->cc_refcount) > 0);
237 spin_lock(&ctx->cc_sec->ps_lock);
239 if (test_and_clear_bit(PTLRPC_CTX_CACHED_BIT, &ctx->cc_flags)) {
240 LASSERT(!hlist_unhashed(&ctx->cc_cache));
241 LASSERT(atomic_read(&ctx->cc_refcount) > 1);
243 hlist_del_init(&ctx->cc_cache);
244 if (atomic_dec_and_test(&ctx->cc_refcount))
248 spin_unlock(&ctx->cc_sec->ps_lock);
251 /****************************************
252 * reverse context installation *
253 ****************************************/
256 unsigned int ctx_hash_index(int hashsize, __u64 key)
258 return (unsigned int) (key & ((__u64) hashsize - 1));
262 void gss_sec_ctx_replace_pf(struct gss_sec *gsec,
263 struct ptlrpc_cli_ctx *new)
265 struct gss_sec_pipefs *gsec_pf;
266 struct ptlrpc_cli_ctx *ctx;
267 struct hlist_node *pos, *next;
268 CFS_HLIST_HEAD(freelist);
272 gsec_pf = container_of(gsec, struct gss_sec_pipefs, gsp_base);
274 hash = ctx_hash_index(gsec_pf->gsp_chash_size,
275 (__u64) new->cc_vcred.vc_uid);
276 LASSERT(hash < gsec_pf->gsp_chash_size);
278 spin_lock(&gsec->gs_base.ps_lock);
280 hlist_for_each_entry_safe(ctx, pos, next,
281 &gsec_pf->gsp_chash[hash], cc_cache) {
282 if (!ctx_match_pf(ctx, &new->cc_vcred))
286 ctx_unhash_pf(ctx, &freelist);
290 ctx_enhash_pf(new, &gsec_pf->gsp_chash[hash]);
292 spin_unlock(&gsec->gs_base.ps_lock);
294 ctx_list_destroy_pf(&freelist);
299 int gss_install_rvs_cli_ctx_pf(struct gss_sec *gsec,
300 struct ptlrpc_svc_ctx *svc_ctx)
302 struct vfs_cred vcred;
303 struct ptlrpc_cli_ctx *cli_ctx;
310 cli_ctx = ctx_create_pf(&gsec->gs_base, &vcred);
314 rc = gss_copy_rvc_cli_ctx(cli_ctx, svc_ctx);
316 ctx_destroy_pf(cli_ctx->cc_sec, cli_ctx);
320 gss_sec_ctx_replace_pf(gsec, cli_ctx);
325 void gss_ctx_cache_gc_pf(struct gss_sec_pipefs *gsec_pf,
326 struct hlist_head *freelist)
328 struct ptlrpc_sec *sec;
329 struct ptlrpc_cli_ctx *ctx;
330 struct hlist_node *pos, *next;
334 sec = &gsec_pf->gsp_base.gs_base;
336 CDEBUG(D_SEC, "do gc on sec %s@%p\n", sec->ps_policy->sp_name, sec);
338 for (i = 0; i < gsec_pf->gsp_chash_size; i++) {
339 hlist_for_each_entry_safe(ctx, pos, next,
340 &gsec_pf->gsp_chash[i], cc_cache)
341 ctx_check_death_locked_pf(ctx, freelist);
344 sec->ps_gc_next = cfs_time_current_sec() + sec->ps_gc_interval;
349 struct ptlrpc_sec* gss_sec_create_pf(struct obd_import *imp,
350 struct ptlrpc_svc_ctx *ctx,
351 struct sptlrpc_flavor *sf)
353 struct gss_sec_pipefs *gsec_pf;
354 int alloc_size, hash_size, i;
357 #define GSS_SEC_PIPEFS_CTX_HASH_SIZE (32)
360 sf->sf_flags & (PTLRPC_SEC_FL_ROOTONLY | PTLRPC_SEC_FL_REVERSE))
363 hash_size = GSS_SEC_PIPEFS_CTX_HASH_SIZE;
365 alloc_size = sizeof(*gsec_pf) +
366 sizeof(struct hlist_head) * hash_size;
368 OBD_ALLOC(gsec_pf, alloc_size);
372 gsec_pf->gsp_chash_size = hash_size;
373 for (i = 0; i < hash_size; i++)
374 CFS_INIT_HLIST_HEAD(&gsec_pf->gsp_chash[i]);
376 if (gss_sec_create_common(&gsec_pf->gsp_base, &gss_policy_pipefs,
381 if (gss_sec_pipe_upcall_init(&gsec_pf->gsp_base))
384 if (gss_install_rvs_cli_ctx_pf(&gsec_pf->gsp_base, ctx))
388 RETURN(&gsec_pf->gsp_base.gs_base);
391 gss_sec_destroy_common(&gsec_pf->gsp_base);
393 OBD_FREE(gsec_pf, alloc_size);
398 void gss_sec_destroy_pf(struct ptlrpc_sec *sec)
400 struct gss_sec_pipefs *gsec_pf;
401 struct gss_sec *gsec;
403 CWARN("destroy %s@%p\n", sec->ps_policy->sp_name, sec);
405 gsec = container_of(sec, struct gss_sec, gs_base);
406 gsec_pf = container_of(gsec, struct gss_sec_pipefs, gsp_base);
408 LASSERT(gsec_pf->gsp_chash);
409 LASSERT(gsec_pf->gsp_chash_size);
411 gss_sec_pipe_upcall_fini(gsec);
413 gss_sec_destroy_common(gsec);
415 OBD_FREE(gsec, sizeof(*gsec_pf) +
416 sizeof(struct hlist_head) * gsec_pf->gsp_chash_size);
420 struct ptlrpc_cli_ctx * gss_sec_lookup_ctx_pf(struct ptlrpc_sec *sec,
421 struct vfs_cred *vcred,
422 int create, int remove_dead)
424 struct gss_sec *gsec;
425 struct gss_sec_pipefs *gsec_pf;
426 struct ptlrpc_cli_ctx *ctx = NULL, *new = NULL;
427 struct hlist_head *hash_head;
428 struct hlist_node *pos, *next;
429 CFS_HLIST_HEAD(freelist);
430 unsigned int hash, gc = 0, found = 0;
435 gsec = container_of(sec, struct gss_sec, gs_base);
436 gsec_pf = container_of(gsec, struct gss_sec_pipefs, gsp_base);
438 hash = ctx_hash_index(gsec_pf->gsp_chash_size,
439 (__u64) vcred->vc_uid);
440 hash_head = &gsec_pf->gsp_chash[hash];
441 LASSERT(hash < gsec_pf->gsp_chash_size);
444 spin_lock(&sec->ps_lock);
446 /* gc_next == 0 means never do gc */
447 if (remove_dead && sec->ps_gc_next &&
448 cfs_time_after(cfs_time_current_sec(), sec->ps_gc_next)) {
449 gss_ctx_cache_gc_pf(gsec_pf, &freelist);
453 hlist_for_each_entry_safe(ctx, pos, next, hash_head, cc_cache) {
455 ctx_check_death_locked_pf(ctx,
456 remove_dead ? &freelist : NULL))
459 if (ctx_match_pf(ctx, vcred)) {
466 if (new && new != ctx) {
467 /* lost the race, just free it */
468 hlist_add_head(&new->cc_cache, &freelist);
472 /* hot node, move to head */
473 if (hash_head->first != &ctx->cc_cache) {
474 __hlist_del(&ctx->cc_cache);
475 hlist_add_head(&ctx->cc_cache, hash_head);
478 /* don't allocate for reverse sec */
479 if (sec_is_reverse(sec)) {
480 spin_unlock(&sec->ps_lock);
485 ctx_enhash_pf(new, hash_head);
488 spin_unlock(&sec->ps_lock);
489 new = ctx_create_pf(sec, vcred);
491 clear_bit(PTLRPC_CTX_NEW_BIT, &new->cc_flags);
500 atomic_inc(&ctx->cc_refcount);
502 spin_unlock(&sec->ps_lock);
504 /* the allocator of the context must give the first push to refresh */
507 gss_cli_ctx_refresh_pf(new);
510 ctx_list_destroy_pf(&freelist);
515 void gss_sec_release_ctx_pf(struct ptlrpc_sec *sec,
516 struct ptlrpc_cli_ctx *ctx,
519 LASSERT(test_bit(PTLRPC_CTX_CACHED_BIT, &ctx->cc_flags) == 0);
520 LASSERT(hlist_unhashed(&ctx->cc_cache));
522 /* if required async, we must clear the UPTODATE bit to prevent extra
523 * rpcs during destroy procedure. */
525 clear_bit(PTLRPC_CTX_UPTODATE_BIT, &ctx->cc_flags);
527 /* destroy this context */
528 ctx_destroy_pf(sec, ctx);
532 * @uid: which user. "-1" means flush all.
533 * @grace: mark context DEAD, allow graceful destroy like notify
535 * @force: also flush busy entries.
537 * return the number of busy context encountered.
539 * In any cases, never touch "eternal" contexts.
542 int gss_sec_flush_ctx_cache_pf(struct ptlrpc_sec *sec,
544 int grace, int force)
546 struct gss_sec *gsec;
547 struct gss_sec_pipefs *gsec_pf;
548 struct ptlrpc_cli_ctx *ctx;
549 struct hlist_node *pos, *next;
550 CFS_HLIST_HEAD(freelist);
554 might_sleep_if(grace);
556 gsec = container_of(sec, struct gss_sec, gs_base);
557 gsec_pf = container_of(gsec, struct gss_sec_pipefs, gsp_base);
559 spin_lock(&sec->ps_lock);
560 for (i = 0; i < gsec_pf->gsp_chash_size; i++) {
561 hlist_for_each_entry_safe(ctx, pos, next,
562 &gsec_pf->gsp_chash[i], cc_cache) {
563 LASSERT(atomic_read(&ctx->cc_refcount) > 0);
565 if (uid != -1 && uid != ctx->cc_vcred.vc_uid)
568 if (atomic_read(&ctx->cc_refcount) > 1) {
573 CWARN("flush busy(%d) ctx %p(%u->%s) by force, "
575 atomic_read(&ctx->cc_refcount),
576 ctx, ctx->cc_vcred.vc_uid,
577 sec2target_str(ctx->cc_sec), grace);
579 ctx_unhash_pf(ctx, &freelist);
581 set_bit(PTLRPC_CTX_DEAD_BIT, &ctx->cc_flags);
583 clear_bit(PTLRPC_CTX_UPTODATE_BIT,
587 spin_unlock(&sec->ps_lock);
589 ctx_list_destroy_pf(&freelist);
593 /****************************************
595 ****************************************/
598 int gss_svc_accept_pf(struct ptlrpc_request *req)
600 return gss_svc_accept(&gss_policy_pipefs, req);
604 int gss_svc_install_rctx_pf(struct obd_import *imp,
605 struct ptlrpc_svc_ctx *ctx)
607 struct ptlrpc_sec *sec;
610 sec = sptlrpc_import_sec_ref(imp);
612 rc = gss_install_rvs_cli_ctx_pf(sec2gsec(sec), ctx);
614 sptlrpc_sec_put(sec);
618 /****************************************
619 * rpc_pipefs definitions *
620 ****************************************/
622 #define LUSTRE_PIPE_ROOT "/lustre"
623 #define LUSTRE_PIPE_KRB5 LUSTRE_PIPE_ROOT"/krb5"
625 struct gss_upcall_msg_data {
629 __u32 gum_svc; /* MDS/OSS... */
630 __u64 gum_nid; /* peer NID */
631 __u8 gum_obd[64]; /* client obd name */
634 struct gss_upcall_msg {
635 struct rpc_pipe_msg gum_base;
636 atomic_t gum_refcount;
637 struct list_head gum_list;
639 struct gss_sec *gum_gsec;
640 struct gss_cli_ctx *gum_gctx;
641 struct gss_upcall_msg_data gum_data;
644 static atomic_t upcall_seq = ATOMIC_INIT(0);
647 __u32 upcall_get_sequence(void)
649 return (__u32) atomic_inc_return(&upcall_seq);
658 __u32 mech_name2idx(const char *name)
660 LASSERT(!strcmp(name, "krb5"));
664 /* pipefs dentries for each mechanisms */
665 static struct dentry *de_pipes[MECH_MAX] = { NULL, };
666 /* all upcall messgaes linked here */
667 static struct list_head upcall_lists[MECH_MAX];
668 /* and protected by this */
669 static spinlock_t upcall_locks[MECH_MAX];
672 void upcall_list_lock(int idx)
674 spin_lock(&upcall_locks[idx]);
678 void upcall_list_unlock(int idx)
680 spin_unlock(&upcall_locks[idx]);
684 void upcall_msg_enlist(struct gss_upcall_msg *msg)
686 __u32 idx = msg->gum_mechidx;
688 upcall_list_lock(idx);
689 list_add(&msg->gum_list, &upcall_lists[idx]);
690 upcall_list_unlock(idx);
694 void upcall_msg_delist(struct gss_upcall_msg *msg)
696 __u32 idx = msg->gum_mechidx;
698 upcall_list_lock(idx);
699 list_del_init(&msg->gum_list);
700 upcall_list_unlock(idx);
703 /****************************************
704 * rpc_pipefs upcall helpers *
705 ****************************************/
708 void gss_release_msg(struct gss_upcall_msg *gmsg)
711 LASSERT(atomic_read(&gmsg->gum_refcount) > 0);
713 if (!atomic_dec_and_test(&gmsg->gum_refcount)) {
718 if (gmsg->gum_gctx) {
719 sptlrpc_cli_ctx_wakeup(&gmsg->gum_gctx->gc_base);
720 sptlrpc_cli_ctx_put(&gmsg->gum_gctx->gc_base, 1);
721 gmsg->gum_gctx = NULL;
724 LASSERT(list_empty(&gmsg->gum_list));
725 LASSERT(list_empty(&gmsg->gum_base.list));
731 void gss_unhash_msg_nolock(struct gss_upcall_msg *gmsg)
733 __u32 idx = gmsg->gum_mechidx;
735 LASSERT(idx < MECH_MAX);
736 LASSERT_SPIN_LOCKED(&upcall_locks[idx]);
738 if (list_empty(&gmsg->gum_list))
741 list_del_init(&gmsg->gum_list);
742 LASSERT(atomic_read(&gmsg->gum_refcount) > 1);
743 atomic_dec(&gmsg->gum_refcount);
747 void gss_unhash_msg(struct gss_upcall_msg *gmsg)
749 __u32 idx = gmsg->gum_mechidx;
751 LASSERT(idx < MECH_MAX);
752 upcall_list_lock(idx);
753 gss_unhash_msg_nolock(gmsg);
754 upcall_list_unlock(idx);
758 void gss_msg_fail_ctx(struct gss_upcall_msg *gmsg)
760 if (gmsg->gum_gctx) {
761 struct ptlrpc_cli_ctx *ctx = &gmsg->gum_gctx->gc_base;
763 LASSERT(atomic_read(&ctx->cc_refcount) > 0);
764 sptlrpc_cli_ctx_expire(ctx);
765 set_bit(PTLRPC_CTX_ERROR_BIT, &ctx->cc_flags);
770 struct gss_upcall_msg * gss_find_upcall(__u32 mechidx, __u32 seq)
772 struct gss_upcall_msg *gmsg;
774 upcall_list_lock(mechidx);
775 list_for_each_entry(gmsg, &upcall_lists[mechidx], gum_list) {
776 if (gmsg->gum_data.gum_seq != seq)
779 LASSERT(atomic_read(&gmsg->gum_refcount) > 0);
780 LASSERT(gmsg->gum_mechidx == mechidx);
782 atomic_inc(&gmsg->gum_refcount);
783 upcall_list_unlock(mechidx);
786 upcall_list_unlock(mechidx);
791 int simple_get_bytes(char **buf, __u32 *buflen, void *res, __u32 reslen)
793 if (*buflen < reslen) {
794 CERROR("buflen %u < %u\n", *buflen, reslen);
798 memcpy(res, *buf, reslen);
804 /****************************************
806 ****************************************/
809 ssize_t gss_pipe_upcall(struct file *filp, struct rpc_pipe_msg *msg,
810 char *dst, size_t buflen)
812 char *data = (char *)msg->data + msg->copied;
813 ssize_t mlen = msg->len;
819 left = copy_to_user(dst, data, mlen);
831 ssize_t gss_pipe_downcall(struct file *filp, const char *src, size_t mlen)
833 struct rpc_inode *rpci = RPC_I(filp->f_dentry->d_inode);
834 struct gss_upcall_msg *gss_msg;
835 struct ptlrpc_cli_ctx *ctx;
836 struct gss_cli_ctx *gctx = NULL;
840 __u32 mechidx, seq, gss_err;
843 mechidx = (__u32) (long) rpci->private;
844 LASSERT(mechidx < MECH_MAX);
846 OBD_ALLOC(buf, mlen);
850 if (copy_from_user(buf, src, mlen)) {
851 CERROR("failed copy user space data\n");
852 GOTO(out_free, rc = -EFAULT);
857 /* data passed down format:
861 * - wire_ctx (rawobj)
862 * - mech_ctx (rawobj)
864 if (simple_get_bytes(&data, &datalen, &seq, sizeof(seq))) {
865 CERROR("fail to get seq\n");
866 GOTO(out_free, rc = -EFAULT);
869 gss_msg = gss_find_upcall(mechidx, seq);
871 CERROR("upcall %u has aborted earlier\n", seq);
872 GOTO(out_free, rc = -EINVAL);
875 gss_unhash_msg(gss_msg);
876 gctx = gss_msg->gum_gctx;
878 LASSERT(atomic_read(&gctx->gc_base.cc_refcount) > 0);
880 /* timeout is not in use for now */
881 if (simple_get_bytes(&data, &datalen, &timeout, sizeof(timeout)))
882 GOTO(out_msg, rc = -EFAULT);
884 /* lgssd signal an error by gc_win == 0 */
885 if (simple_get_bytes(&data, &datalen, &gctx->gc_win,
886 sizeof(gctx->gc_win)))
887 GOTO(out_msg, rc = -EFAULT);
889 if (gctx->gc_win == 0) {
894 if (simple_get_bytes(&data, &datalen, &rc, sizeof(rc)))
895 GOTO(out_msg, rc = -EFAULT);
896 if (simple_get_bytes(&data, &datalen, &gss_err,sizeof(gss_err)))
897 GOTO(out_msg, rc = -EFAULT);
899 if (rc == 0 && gss_err == GSS_S_COMPLETE) {
900 CWARN("both rpc & gss error code not set\n");
907 if (rawobj_extract_local(&tmpobj, (__u32 **) &data, &datalen))
908 GOTO(out_msg, rc = -EFAULT);
909 if (rawobj_dup(&gctx->gc_handle, &tmpobj))
910 GOTO(out_msg, rc = -ENOMEM);
913 if (rawobj_extract_local(&tmpobj, (__u32 **) &data, &datalen))
914 GOTO(out_msg, rc = -EFAULT);
915 gss_err = lgss_import_sec_context(&tmpobj,
916 gss_msg->gum_gsec->gs_mech,
921 if (likely(rc == 0 && gss_err == GSS_S_COMPLETE)) {
922 gss_cli_ctx_uptodate(gctx);
924 ctx = &gctx->gc_base;
925 sptlrpc_cli_ctx_expire(ctx);
926 if (rc != -ERESTART || gss_err != GSS_S_COMPLETE)
927 set_bit(PTLRPC_CTX_ERROR_BIT, &ctx->cc_flags);
929 CERROR("refresh ctx %p(uid %d) failed: %d/0x%08x: %s\n",
930 ctx, ctx->cc_vcred.vc_uid, rc, gss_err,
931 test_bit(PTLRPC_CTX_ERROR_BIT, &ctx->cc_flags) ?
932 "fatal error" : "non-fatal");
938 gss_release_msg(gss_msg);
943 * hack pipefs: always return asked length unless all following
944 * downcalls might be messed up. */
950 void gss_pipe_destroy_msg(struct rpc_pipe_msg *msg)
952 struct gss_upcall_msg *gmsg;
953 struct gss_upcall_msg_data *gumd;
954 static cfs_time_t ratelimit = 0;
957 LASSERT(list_empty(&msg->list));
959 /* normally errno is >= 0 */
960 if (msg->errno >= 0) {
965 gmsg = container_of(msg, struct gss_upcall_msg, gum_base);
966 gumd = &gmsg->gum_data;
967 LASSERT(atomic_read(&gmsg->gum_refcount) > 0);
969 CERROR("failed msg %p (seq %u, uid %u, svc %u, nid "LPX64", obd %.*s): "
970 "errno %d\n", msg, gumd->gum_seq, gumd->gum_uid, gumd->gum_svc,
971 gumd->gum_nid, (int) sizeof(gumd->gum_obd),
972 gumd->gum_obd, msg->errno);
974 atomic_inc(&gmsg->gum_refcount);
975 gss_unhash_msg(gmsg);
976 if (msg->errno == -ETIMEDOUT || msg->errno == -EPIPE) {
977 cfs_time_t now = cfs_time_current_sec();
979 if (cfs_time_after(now, ratelimit)) {
980 CWARN("upcall timed out, is lgssd running?\n");
981 ratelimit = now + 15;
984 gss_msg_fail_ctx(gmsg);
985 gss_release_msg(gmsg);
990 void gss_pipe_release(struct inode *inode)
992 struct rpc_inode *rpci = RPC_I(inode);
996 idx = (__u32) (long) rpci->private;
997 LASSERT(idx < MECH_MAX);
999 upcall_list_lock(idx);
1000 while (!list_empty(&upcall_lists[idx])) {
1001 struct gss_upcall_msg *gmsg;
1002 struct gss_upcall_msg_data *gumd;
1004 gmsg = list_entry(upcall_lists[idx].next,
1005 struct gss_upcall_msg, gum_list);
1006 gumd = &gmsg->gum_data;
1007 LASSERT(list_empty(&gmsg->gum_base.list));
1009 CERROR("failing remaining msg %p:seq %u, uid %u, svc %u, "
1010 "nid "LPX64", obd %.*s\n", gmsg,
1011 gumd->gum_seq, gumd->gum_uid, gumd->gum_svc,
1012 gumd->gum_nid, (int) sizeof(gumd->gum_obd),
1015 gmsg->gum_base.errno = -EPIPE;
1016 atomic_inc(&gmsg->gum_refcount);
1017 gss_unhash_msg_nolock(gmsg);
1019 gss_msg_fail_ctx(gmsg);
1021 upcall_list_unlock(idx);
1022 gss_release_msg(gmsg);
1023 upcall_list_lock(idx);
1025 upcall_list_unlock(idx);
1029 static struct rpc_pipe_ops gss_upcall_ops = {
1030 .upcall = gss_pipe_upcall,
1031 .downcall = gss_pipe_downcall,
1032 .destroy_msg = gss_pipe_destroy_msg,
1033 .release_pipe = gss_pipe_release,
1036 /****************************************
1037 * upcall helper functions *
1038 ****************************************/
1041 int gss_ctx_refresh_pf(struct ptlrpc_cli_ctx *ctx)
1043 struct obd_import *imp;
1044 struct gss_sec *gsec;
1045 struct gss_upcall_msg *gmsg;
1051 LASSERT(ctx->cc_sec);
1052 LASSERT(ctx->cc_sec->ps_import);
1053 LASSERT(ctx->cc_sec->ps_import->imp_obd);
1055 imp = ctx->cc_sec->ps_import;
1056 if (!imp->imp_connection) {
1057 CERROR("import has no connection set\n");
1061 gsec = container_of(ctx->cc_sec, struct gss_sec, gs_base);
1063 OBD_ALLOC_PTR(gmsg);
1067 /* initialize pipefs base msg */
1068 CFS_INIT_LIST_HEAD(&gmsg->gum_base.list);
1069 gmsg->gum_base.data = &gmsg->gum_data;
1070 gmsg->gum_base.len = sizeof(gmsg->gum_data);
1071 gmsg->gum_base.copied = 0;
1072 gmsg->gum_base.errno = 0;
1074 /* init upcall msg */
1075 atomic_set(&gmsg->gum_refcount, 1);
1076 gmsg->gum_mechidx = mech_name2idx(gsec->gs_mech->gm_name);
1077 gmsg->gum_gsec = gsec;
1078 gmsg->gum_gctx = container_of(sptlrpc_cli_ctx_get(ctx),
1079 struct gss_cli_ctx, gc_base);
1080 gmsg->gum_data.gum_seq = upcall_get_sequence();
1081 gmsg->gum_data.gum_uid = ctx->cc_vcred.vc_uid;
1082 gmsg->gum_data.gum_gid = 0; /* not used for now */
1083 gmsg->gum_data.gum_svc = import_to_gss_svc(imp);
1084 gmsg->gum_data.gum_nid = imp->imp_connection->c_peer.nid;
1085 strncpy(gmsg->gum_data.gum_obd, imp->imp_obd->obd_name,
1086 sizeof(gmsg->gum_data.gum_obd));
1088 /* This only could happen when sysadmin set it dead/expired
1089 * using lctl by force. */
1090 if (ctx->cc_flags & PTLRPC_CTX_STATUS_MASK) {
1091 CWARN("ctx %p(%u->%s) was set flags %lx unexpectedly\n",
1092 ctx, ctx->cc_vcred.vc_uid, sec2target_str(ctx->cc_sec),
1095 LASSERT(!(ctx->cc_flags & PTLRPC_CTX_UPTODATE));
1096 ctx->cc_flags |= PTLRPC_CTX_DEAD | PTLRPC_CTX_ERROR;
1102 upcall_msg_enlist(gmsg);
1104 rc = rpc_queue_upcall(de_pipes[gmsg->gum_mechidx]->d_inode,
1107 CERROR("rpc_queue_upcall failed: %d\n", rc);
1109 upcall_msg_delist(gmsg);
1120 int gss_cli_ctx_refresh_pf(struct ptlrpc_cli_ctx *ctx)
1122 /* if we are refreshing for root, also update the reverse
1123 * handle index, do not confuse reverse contexts. */
1124 if (ctx->cc_vcred.vc_uid == 0) {
1125 struct gss_sec *gsec;
1127 gsec = container_of(ctx->cc_sec, struct gss_sec, gs_base);
1128 gsec->gs_rvs_hdl = gss_get_next_ctx_index();
1131 return gss_ctx_refresh_pf(ctx);
1134 /****************************************
1135 * lustre gss pipefs policy *
1136 ****************************************/
1138 static struct ptlrpc_ctx_ops gss_pipefs_ctxops = {
1139 .match = gss_cli_ctx_match,
1140 .refresh = gss_cli_ctx_refresh_pf,
1141 .validate = gss_cli_ctx_validate_pf,
1142 .die = gss_cli_ctx_die_pf,
1143 .sign = gss_cli_ctx_sign,
1144 .verify = gss_cli_ctx_verify,
1145 .seal = gss_cli_ctx_seal,
1146 .unseal = gss_cli_ctx_unseal,
1147 .wrap_bulk = gss_cli_ctx_wrap_bulk,
1148 .unwrap_bulk = gss_cli_ctx_unwrap_bulk,
1151 static struct ptlrpc_sec_cops gss_sec_pipefs_cops = {
1152 .create_sec = gss_sec_create_pf,
1153 .destroy_sec = gss_sec_destroy_pf,
1154 .kill_sec = gss_sec_kill,
1155 .lookup_ctx = gss_sec_lookup_ctx_pf,
1156 .release_ctx = gss_sec_release_ctx_pf,
1157 .flush_ctx_cache = gss_sec_flush_ctx_cache_pf,
1158 .install_rctx = gss_sec_install_rctx,
1159 .alloc_reqbuf = gss_alloc_reqbuf,
1160 .free_reqbuf = gss_free_reqbuf,
1161 .alloc_repbuf = gss_alloc_repbuf,
1162 .free_repbuf = gss_free_repbuf,
1163 .enlarge_reqbuf = gss_enlarge_reqbuf,
1166 static struct ptlrpc_sec_sops gss_sec_pipefs_sops = {
1167 .accept = gss_svc_accept_pf,
1168 .invalidate_ctx = gss_svc_invalidate_ctx,
1169 .alloc_rs = gss_svc_alloc_rs,
1170 .authorize = gss_svc_authorize,
1171 .free_rs = gss_svc_free_rs,
1172 .free_ctx = gss_svc_free_ctx,
1173 .unwrap_bulk = gss_svc_unwrap_bulk,
1174 .wrap_bulk = gss_svc_wrap_bulk,
1175 .install_rctx = gss_svc_install_rctx_pf,
1178 static struct ptlrpc_sec_policy gss_policy_pipefs = {
1179 .sp_owner = THIS_MODULE,
1180 .sp_name = "gss.pipefs",
1181 .sp_policy = SPTLRPC_POLICY_GSS_PIPEFS,
1182 .sp_cops = &gss_sec_pipefs_cops,
1183 .sp_sops = &gss_sec_pipefs_sops,
1187 int __init gss_init_pipefs_upcall(void)
1192 de = rpc_mkdir(LUSTRE_PIPE_ROOT, NULL);
1193 if (IS_ERR(de) && PTR_ERR(de) != -EEXIST) {
1194 CERROR("Failed to create gss pipe dir: %ld\n", PTR_ERR(de));
1198 /* FIXME hack pipefs: dput will sometimes cause oops during module
1199 * unload and lgssd close the pipe fds. */
1201 /* krb5 mechanism */
1202 de = rpc_mkpipe(LUSTRE_PIPE_KRB5, (void *) MECH_KRB5, &gss_upcall_ops,
1203 RPC_PIPE_WAIT_FOR_OPEN);
1204 if (!de || IS_ERR(de)) {
1205 CERROR("failed to make rpc_pipe %s: %ld\n",
1206 LUSTRE_PIPE_KRB5, PTR_ERR(de));
1207 rpc_rmdir(LUSTRE_PIPE_ROOT);
1211 de_pipes[MECH_KRB5] = de;
1212 CFS_INIT_LIST_HEAD(&upcall_lists[MECH_KRB5]);
1213 spin_lock_init(&upcall_locks[MECH_KRB5]);
1219 void __exit gss_exit_pipefs_upcall(void)
1223 for (i = 0; i < MECH_MAX; i++) {
1224 LASSERT(list_empty(&upcall_lists[i]));
1226 /* dput pipe dentry here might cause lgssd oops. */
1230 rpc_unlink(LUSTRE_PIPE_KRB5);
1231 rpc_rmdir(LUSTRE_PIPE_ROOT);
1234 int __init gss_init_pipefs(void)
1238 rc = gss_init_pipefs_upcall();
1242 rc = sptlrpc_register_policy(&gss_policy_pipefs);
1244 gss_exit_pipefs_upcall();
1251 void __exit gss_exit_pipefs(void)
1253 gss_exit_pipefs_upcall();
1254 sptlrpc_unregister_policy(&gss_policy_pipefs);