2 * Modifications for Lustre
4 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
6 * Copyright (c) 2012, 2014, Intel Corporation.
8 * Author: Eric Mei <ericm@clusterfs.com>
12 * Neil Brown <neilb@cse.unsw.edu.au>
13 * J. Bruce Fields <bfields@umich.edu>
14 * Andy Adamson <andros@umich.edu>
15 * Dug Song <dugsong@monkey.org>
17 * RPCSEC_GSS server authentication.
18 * This implements RPCSEC_GSS as defined in rfc2203 (rpcsec_gss) and rfc2078
21 * The RPCSEC_GSS involves three stages:
24 * 3/ context destruction
26 * Context creation is handled largely by upcalls to user-space.
27 * In particular, GSS_Accept_sec_context is handled by an upcall
28 * Data exchange is handled entirely within the kernel
29 * In particular, GSS_GetMIC, GSS_VerifyMIC, GSS_Seal, GSS_Unseal are in-kernel.
30 * Context destruction is handled in-kernel
31 * GSS_Delete_sec_context is in-kernel
33 * Context creation is initiated by a RPCSEC_GSS_INIT request arriving.
34 * The context handle and gss_token are used as a key into the rpcsec_init cache.
35 * The content of this cache includes some of the outputs of GSS_Accept_sec_context,
36 * being major_status, minor_status, context_handle, reply_token.
37 * These are sent back to the client.
38 * Sequence window management is handled by the kernel. The window size if currently
39 * a compile time constant.
41 * When user-space is happy that a context is established, it places an entry
42 * in the rpcsec_context cache. The key for this cache is the context_handle.
43 * The content includes:
44 * uid/gidlist - for determining access rights
46 * mechanism specific information, such as a key
50 #define DEBUG_SUBSYSTEM S_SEC
51 #include <linux/types.h>
52 #include <linux/init.h>
53 #include <linux/module.h>
54 #include <linux/random.h>
55 #include <linux/slab.h>
56 #include <linux/hash.h>
57 #include <linux/mutex.h>
58 #include <linux/sunrpc/cache.h>
62 #include <obd_class.h>
63 #include <obd_support.h>
64 #include <lustre_import.h>
65 #include <lustre_net.h>
66 #include <lustre_nodemap.h>
67 #include <lustre_sec.h>
70 #include "gss_internal.h"
72 #include "gss_crypto.h"
74 #define GSS_SVC_UPCALL_TIMEOUT (20)
76 static DEFINE_SPINLOCK(__ctx_index_lock);
77 static __u64 __ctx_index;
79 unsigned int krb5_allow_old_client_csum;
81 __u64 gss_get_next_ctx_index(void)
85 spin_lock(&__ctx_index_lock);
87 spin_unlock(&__ctx_index_lock);
92 static inline unsigned long hash_mem(char *buf, int length, int bits)
94 unsigned long hash = 0;
109 if ((len & (BITS_PER_LONG/8-1)) == 0)
110 hash = hash_long(hash^l, BITS_PER_LONG);
113 return hash >> (BITS_PER_LONG - bits);
116 /* This compatibility can be removed once kernel 3.3 is used,
117 * since cache_register_net/cache_unregister_net are exported.
118 * Note that since kernel 3.4 cache_register and cache_unregister
121 static inline int _cache_register_net(struct cache_detail *cd, struct net *net)
123 #ifdef HAVE_CACHE_REGISTER
124 return cache_register(cd);
126 return cache_register_net(cd, net);
129 static inline void _cache_unregister_net(struct cache_detail *cd,
132 #ifdef HAVE_CACHE_REGISTER
133 cache_unregister(cd);
135 cache_unregister_net(cd, net);
138 /****************************************
139 * rpc sec init (rsi) cache *
140 ****************************************/
142 #define RSI_HASHBITS (6)
143 #define RSI_HASHMAX (1 << RSI_HASHBITS)
144 #define RSI_HASHMASK (RSI_HASHMAX - 1)
150 char nm_name[LUSTRE_NODEMAP_NAME_LENGTH + 1];
151 wait_queue_head_t waitq;
152 rawobj_t in_handle, in_token;
153 rawobj_t out_handle, out_token;
154 int major_status, minor_status;
157 #ifdef HAVE_CACHE_HEAD_HLIST
158 static struct hlist_head rsi_table[RSI_HASHMAX];
160 static struct cache_head *rsi_table[RSI_HASHMAX];
162 static struct cache_detail rsi_cache;
163 static struct rsi *rsi_update(struct rsi *new, struct rsi *old);
164 static struct rsi *rsi_lookup(struct rsi *item);
166 #ifdef HAVE_CACHE_DETAIL_WRITERS
167 static inline int channel_users(struct cache_detail *cd)
169 return atomic_read(&cd->writers);
172 static inline int channel_users(struct cache_detail *cd)
174 return atomic_read(&cd->readers);
178 static inline int rsi_hash(struct rsi *item)
180 return hash_mem((char *)item->in_handle.data, item->in_handle.len,
182 hash_mem((char *)item->in_token.data, item->in_token.len,
186 static inline int __rsi_match(struct rsi *item, struct rsi *tmp)
188 return (rawobj_equal(&item->in_handle, &tmp->in_handle) &&
189 rawobj_equal(&item->in_token, &tmp->in_token));
192 static void rsi_free(struct rsi *rsi)
194 rawobj_free(&rsi->in_handle);
195 rawobj_free(&rsi->in_token);
196 rawobj_free(&rsi->out_handle);
197 rawobj_free(&rsi->out_token);
200 /* See handle_channel_req() userspace for where the upcall data is read */
201 static void rsi_request(struct cache_detail *cd,
202 struct cache_head *h,
203 char **bpp, int *blen)
205 struct rsi *rsi = container_of(h, struct rsi, h);
208 /* if in_handle is null, provide kernel suggestion */
209 if (rsi->in_handle.len == 0)
210 index = gss_get_next_ctx_index();
212 qword_addhex(bpp, blen, (char *) &rsi->lustre_svc,
213 sizeof(rsi->lustre_svc));
214 qword_addhex(bpp, blen, (char *) &rsi->nid, sizeof(rsi->nid));
215 qword_addhex(bpp, blen, (char *) &index, sizeof(index));
216 qword_addhex(bpp, blen, (char *) rsi->nm_name,
217 strlen(rsi->nm_name) + 1);
218 qword_addhex(bpp, blen, rsi->in_handle.data, rsi->in_handle.len);
219 qword_addhex(bpp, blen, rsi->in_token.data, rsi->in_token.len);
223 #ifdef HAVE_SUNRPC_UPCALL_HAS_3ARGS
224 static int rsi_upcall(struct cache_detail *cd, struct cache_head *h)
226 return sunrpc_cache_pipe_upcall(cd, h, rsi_request);
230 static int rsi_upcall(struct cache_detail *cd, struct cache_head *h)
232 return sunrpc_cache_pipe_upcall(cd, h);
236 static inline void __rsi_init(struct rsi *new, struct rsi *item)
238 new->out_handle = RAWOBJ_EMPTY;
239 new->out_token = RAWOBJ_EMPTY;
241 new->in_handle = item->in_handle;
242 item->in_handle = RAWOBJ_EMPTY;
243 new->in_token = item->in_token;
244 item->in_token = RAWOBJ_EMPTY;
246 new->lustre_svc = item->lustre_svc;
247 new->nid = item->nid;
248 memcpy(new->nm_name, item->nm_name, sizeof(item->nm_name));
249 init_waitqueue_head(&new->waitq);
252 static inline void __rsi_update(struct rsi *new, struct rsi *item)
254 LASSERT(new->out_handle.len == 0);
255 LASSERT(new->out_token.len == 0);
257 new->out_handle = item->out_handle;
258 item->out_handle = RAWOBJ_EMPTY;
259 new->out_token = item->out_token;
260 item->out_token = RAWOBJ_EMPTY;
262 new->major_status = item->major_status;
263 new->minor_status = item->minor_status;
266 static void rsi_put(struct kref *ref)
268 struct rsi *rsi = container_of(ref, struct rsi, h.ref);
270 #ifdef HAVE_CACHE_HEAD_HLIST
271 LASSERT(rsi->h.cache_list.next == NULL);
273 LASSERT(rsi->h.next == NULL);
279 static int rsi_match(struct cache_head *a, struct cache_head *b)
281 struct rsi *item = container_of(a, struct rsi, h);
282 struct rsi *tmp = container_of(b, struct rsi, h);
284 return __rsi_match(item, tmp);
287 static void rsi_init(struct cache_head *cnew, struct cache_head *citem)
289 struct rsi *new = container_of(cnew, struct rsi, h);
290 struct rsi *item = container_of(citem, struct rsi, h);
292 __rsi_init(new, item);
295 static void update_rsi(struct cache_head *cnew, struct cache_head *citem)
297 struct rsi *new = container_of(cnew, struct rsi, h);
298 struct rsi *item = container_of(citem, struct rsi, h);
300 __rsi_update(new, item);
303 static struct cache_head *rsi_alloc(void)
314 static int rsi_parse(struct cache_detail *cd, char *mesg, int mlen)
318 struct rsi rsii, *rsip = NULL;
320 int status = -EINVAL;
324 memset(&rsii, 0, sizeof(rsii));
327 len = qword_get(&mesg, buf, mlen);
330 if (rawobj_alloc(&rsii.in_handle, buf, len)) {
336 len = qword_get(&mesg, buf, mlen);
339 if (rawobj_alloc(&rsii.in_token, buf, len)) {
344 rsip = rsi_lookup(&rsii);
350 expiry = get_expiry(&mesg);
354 len = qword_get(&mesg, buf, mlen);
359 status = kstrtoint(buf, 10, &rsii.major_status);
364 len = qword_get(&mesg, buf, mlen);
370 status = kstrtoint(buf, 10, &rsii.minor_status);
375 len = qword_get(&mesg, buf, mlen);
378 if (rawobj_alloc(&rsii.out_handle, buf, len)) {
384 len = qword_get(&mesg, buf, mlen);
387 if (rawobj_alloc(&rsii.out_token, buf, len)) {
392 rsii.h.expiry_time = expiry;
393 rsip = rsi_update(&rsii, rsip);
398 wake_up_all(&rsip->waitq);
399 cache_put(&rsip->h, &rsi_cache);
405 CERROR("rsi parse error %d\n", status);
409 static struct cache_detail rsi_cache = {
410 .hash_size = RSI_HASHMAX,
411 .hash_table = rsi_table,
412 .name = "auth.sptlrpc.init",
413 .cache_put = rsi_put,
414 #ifndef HAVE_SUNRPC_UPCALL_HAS_3ARGS
415 .cache_request = rsi_request,
417 .cache_upcall = rsi_upcall,
418 .cache_parse = rsi_parse,
421 .update = update_rsi,
425 static struct rsi *rsi_lookup(struct rsi *item)
427 struct cache_head *ch;
428 int hash = rsi_hash(item);
430 ch = sunrpc_cache_lookup(&rsi_cache, &item->h, hash);
432 return container_of(ch, struct rsi, h);
437 static struct rsi *rsi_update(struct rsi *new, struct rsi *old)
439 struct cache_head *ch;
440 int hash = rsi_hash(new);
442 ch = sunrpc_cache_update(&rsi_cache, &new->h, &old->h, hash);
444 return container_of(ch, struct rsi, h);
449 /****************************************
450 * rpc sec context (rsc) cache *
451 ****************************************/
453 #define RSC_HASHBITS (10)
454 #define RSC_HASHMAX (1 << RSC_HASHBITS)
455 #define RSC_HASHMASK (RSC_HASHMAX - 1)
459 struct obd_device *target;
461 struct gss_svc_ctx ctx;
464 #ifdef HAVE_CACHE_HEAD_HLIST
465 static struct hlist_head rsc_table[RSC_HASHMAX];
467 static struct cache_head *rsc_table[RSC_HASHMAX];
469 static struct cache_detail rsc_cache;
470 static struct rsc *rsc_update(struct rsc *new, struct rsc *old);
471 static struct rsc *rsc_lookup(struct rsc *item);
473 static void rsc_free(struct rsc *rsci)
475 rawobj_free(&rsci->handle);
476 rawobj_free(&rsci->ctx.gsc_rvs_hdl);
477 lgss_delete_sec_context(&rsci->ctx.gsc_mechctx);
480 static inline int rsc_hash(struct rsc *rsci)
482 return hash_mem((char *)rsci->handle.data,
483 rsci->handle.len, RSC_HASHBITS);
486 static inline int __rsc_match(struct rsc *new, struct rsc *tmp)
488 return rawobj_equal(&new->handle, &tmp->handle);
491 static inline void __rsc_init(struct rsc *new, struct rsc *tmp)
493 new->handle = tmp->handle;
494 tmp->handle = RAWOBJ_EMPTY;
497 memset(&new->ctx, 0, sizeof(new->ctx));
498 new->ctx.gsc_rvs_hdl = RAWOBJ_EMPTY;
501 static inline void __rsc_update(struct rsc *new, struct rsc *tmp)
504 tmp->ctx.gsc_rvs_hdl = RAWOBJ_EMPTY;
505 tmp->ctx.gsc_mechctx = NULL;
507 memset(&new->ctx.gsc_seqdata, 0, sizeof(new->ctx.gsc_seqdata));
508 spin_lock_init(&new->ctx.gsc_seqdata.ssd_lock);
511 static void rsc_put(struct kref *ref)
513 struct rsc *rsci = container_of(ref, struct rsc, h.ref);
515 #ifdef HAVE_CACHE_HEAD_HLIST
516 LASSERT(rsci->h.cache_list.next == NULL);
518 LASSERT(rsci->h.next == NULL);
524 static int rsc_match(struct cache_head *a, struct cache_head *b)
526 struct rsc *new = container_of(a, struct rsc, h);
527 struct rsc *tmp = container_of(b, struct rsc, h);
529 return __rsc_match(new, tmp);
532 static void rsc_init(struct cache_head *cnew, struct cache_head *ctmp)
534 struct rsc *new = container_of(cnew, struct rsc, h);
535 struct rsc *tmp = container_of(ctmp, struct rsc, h);
537 __rsc_init(new, tmp);
540 static void update_rsc(struct cache_head *cnew, struct cache_head *ctmp)
542 struct rsc *new = container_of(cnew, struct rsc, h);
543 struct rsc *tmp = container_of(ctmp, struct rsc, h);
545 __rsc_update(new, tmp);
548 static struct cache_head * rsc_alloc(void)
559 static int rsc_parse(struct cache_detail *cd, char *mesg, int mlen)
562 int len, rv, tmp_int;
563 struct rsc rsci, *rscp = NULL;
565 int status = -EINVAL;
566 struct gss_api_mech *gm = NULL;
568 memset(&rsci, 0, sizeof(rsci));
571 len = qword_get(&mesg, buf, mlen);
572 if (len < 0) goto out;
574 if (rawobj_alloc(&rsci.handle, buf, len))
579 expiry = get_expiry(&mesg);
585 rv = get_int(&mesg, &tmp_int);
587 CERROR("fail to get remote flag\n");
590 rsci.ctx.gsc_remote = (tmp_int != 0);
593 rv = get_int(&mesg, &tmp_int);
595 CERROR("fail to get root user flag\n");
598 rsci.ctx.gsc_usr_root = (tmp_int != 0);
601 rv = get_int(&mesg, &tmp_int);
603 CERROR("fail to get mds user flag\n");
606 rsci.ctx.gsc_usr_mds = (tmp_int != 0);
609 rv = get_int(&mesg, &tmp_int);
611 CERROR("fail to get oss user flag\n");
614 rsci.ctx.gsc_usr_oss = (tmp_int != 0);
617 rv = get_int(&mesg, (int *) &rsci.ctx.gsc_mapped_uid);
619 CERROR("fail to get mapped uid\n");
623 rscp = rsc_lookup(&rsci);
627 /* uid, or NEGATIVE */
628 rv = get_int(&mesg, (int *) &rsci.ctx.gsc_uid);
632 CERROR("NOENT? set rsc entry negative\n");
633 set_bit(CACHE_NEGATIVE, &rsci.h.flags);
639 if (get_int(&mesg, (int *) &rsci.ctx.gsc_gid))
643 len = qword_get(&mesg, buf, mlen);
646 gm = lgss_name_to_mech(buf);
647 status = -EOPNOTSUPP;
652 /* mech-specific data: */
653 len = qword_get(&mesg, buf, mlen);
658 tmp_buf.data = (unsigned char *)buf;
659 if (lgss_import_sec_context(&tmp_buf, gm,
660 &rsci.ctx.gsc_mechctx))
663 /* set to seconds since machine booted */
664 expiry = ktime_get_seconds();
666 /* currently the expiry time passed down from user-space
667 * is invalid, here we retrive it from mech.
669 if (lgss_inquire_context(rsci.ctx.gsc_mechctx, &ctx_expiry)) {
670 CERROR("unable to get expire time, drop it\n");
674 /* ctx_expiry is the number of seconds since Jan 1 1970.
675 * We want just the number of seconds into the future.
677 expiry += ctx_expiry - ktime_get_real_seconds();
680 rsci.h.expiry_time = expiry;
681 rscp = rsc_update(&rsci, rscp);
688 cache_put(&rscp->h, &rsc_cache);
693 CERROR("parse rsc error %d\n", status);
697 static struct cache_detail rsc_cache = {
698 .hash_size = RSC_HASHMAX,
699 .hash_table = rsc_table,
700 .name = "auth.sptlrpc.context",
701 .cache_put = rsc_put,
702 .cache_parse = rsc_parse,
705 .update = update_rsc,
709 static struct rsc *rsc_lookup(struct rsc *item)
711 struct cache_head *ch;
712 int hash = rsc_hash(item);
714 ch = sunrpc_cache_lookup(&rsc_cache, &item->h, hash);
716 return container_of(ch, struct rsc, h);
721 static struct rsc *rsc_update(struct rsc *new, struct rsc *old)
723 struct cache_head *ch;
724 int hash = rsc_hash(new);
726 ch = sunrpc_cache_update(&rsc_cache, &new->h, &old->h, hash);
728 return container_of(ch, struct rsc, h);
733 #define COMPAT_RSC_PUT(item, cd) cache_put((item), (cd))
735 /****************************************
737 ****************************************/
739 static struct rsc *gss_svc_searchbyctx(rawobj_t *handle)
744 memset(&rsci, 0, sizeof(rsci));
745 if (rawobj_dup(&rsci.handle, handle))
748 found = rsc_lookup(&rsci);
752 if (cache_check(&rsc_cache, &found->h, NULL))
757 int gss_svc_upcall_install_rvs_ctx(struct obd_import *imp,
758 struct gss_sec *gsec,
759 struct gss_cli_ctx *gctx)
761 struct rsc rsci, *rscp = NULL;
767 memset(&rsci, 0, sizeof(rsci));
769 if (rawobj_alloc(&rsci.handle, (char *) &gsec->gs_rvs_hdl,
770 sizeof(gsec->gs_rvs_hdl)))
771 GOTO(out, rc = -ENOMEM);
773 rscp = rsc_lookup(&rsci);
775 GOTO(out, rc = -ENOMEM);
777 major = lgss_copy_reverse_context(gctx->gc_mechctx,
778 &rsci.ctx.gsc_mechctx);
779 if (major != GSS_S_COMPLETE)
780 GOTO(out, rc = -ENOMEM);
782 if (lgss_inquire_context(rsci.ctx.gsc_mechctx, &ctx_expiry)) {
783 CERROR("unable to get expire time, drop it\n");
784 GOTO(out, rc = -EINVAL);
786 rsci.h.expiry_time = (time_t) ctx_expiry;
788 switch (imp->imp_obd->u.cli.cl_sp_to) {
790 rsci.ctx.gsc_usr_mds = 1;
793 rsci.ctx.gsc_usr_oss = 1;
796 rsci.ctx.gsc_usr_root = 1;
799 /* by convention, all 3 set to 1 means MGS */
800 rsci.ctx.gsc_usr_mds = 1;
801 rsci.ctx.gsc_usr_oss = 1;
802 rsci.ctx.gsc_usr_root = 1;
808 rscp = rsc_update(&rsci, rscp);
810 GOTO(out, rc = -ENOMEM);
812 rscp->target = imp->imp_obd;
813 rawobj_dup(&gctx->gc_svc_handle, &rscp->handle);
815 CWARN("create reverse svc ctx %p to %s: idx %#llx\n",
816 &rscp->ctx, obd2cli_tgt(imp->imp_obd), gsec->gs_rvs_hdl);
820 cache_put(&rscp->h, &rsc_cache);
824 CERROR("create reverse svc ctx: idx %#llx, rc %d\n",
825 gsec->gs_rvs_hdl, rc);
829 int gss_svc_upcall_expire_rvs_ctx(rawobj_t *handle)
831 const time64_t expire = 20;
834 rscp = gss_svc_searchbyctx(handle);
836 CDEBUG(D_SEC, "reverse svcctx %p (rsc %p) expire soon\n",
839 rscp->h.expiry_time = ktime_get_real_seconds() + expire;
840 COMPAT_RSC_PUT(&rscp->h, &rsc_cache);
845 int gss_svc_upcall_dup_handle(rawobj_t *handle, struct gss_svc_ctx *ctx)
847 struct rsc *rscp = container_of(ctx, struct rsc, ctx);
849 return rawobj_dup(handle, &rscp->handle);
852 int gss_svc_upcall_update_sequence(rawobj_t *handle, __u32 seq)
856 rscp = gss_svc_searchbyctx(handle);
858 CDEBUG(D_SEC, "reverse svcctx %p (rsc %p) update seq to %u\n",
859 &rscp->ctx, rscp, seq + 1);
861 rscp->ctx.gsc_rvs_seq = seq + 1;
862 COMPAT_RSC_PUT(&rscp->h, &rsc_cache);
867 static struct cache_deferred_req* cache_upcall_defer(struct cache_req *req)
871 static struct cache_req cache_upcall_chandle = { cache_upcall_defer };
873 int gss_svc_upcall_handle_init(struct ptlrpc_request *req,
874 struct gss_svc_reqctx *grctx,
875 struct gss_wire_ctx *gw,
876 struct obd_device *target,
881 struct ptlrpc_reply_state *rs;
882 struct rsc *rsci = NULL;
883 struct rsi *rsip = NULL, rsikey;
884 wait_queue_entry_t wait;
885 int replen = sizeof(struct ptlrpc_body);
886 struct gss_rep_header *rephdr;
888 int rc = SECSVC_DROP;
891 memset(&rsikey, 0, sizeof(rsikey));
892 rsikey.lustre_svc = lustre_svc;
893 /* In case of MR, rq_peer is not the NID from which request is received,
894 * but primary NID of peer.
895 * So we need rq_source, which contains the NID actually in use.
897 rsikey.nid = (__u64) req->rq_source.nid;
898 nodemap_test_nid(req->rq_peer.nid, rsikey.nm_name,
899 sizeof(rsikey.nm_name));
901 /* duplicate context handle. for INIT it always 0 */
902 if (rawobj_dup(&rsikey.in_handle, &gw->gw_handle)) {
903 CERROR("fail to dup context handle\n");
907 if (rawobj_dup(&rsikey.in_token, in_token)) {
908 CERROR("can't duplicate token\n");
909 rawobj_free(&rsikey.in_handle);
913 rsip = rsi_lookup(&rsikey);
916 CERROR("error in rsi_lookup.\n");
918 if (!gss_pack_err_notify(req, GSS_S_FAILURE, 0))
919 rc = SECSVC_COMPLETE;
924 cache_get(&rsip->h); /* take an extra ref */
925 init_waitqueue_head(&rsip->waitq);
926 init_waitqueue_entry(&wait, current);
927 add_wait_queue(&rsip->waitq, &wait);
930 /* Note each time cache_check() will drop a reference if return
931 * non-zero. We hold an extra reference on initial rsip, but must
932 * take care of following calls. */
933 rc = cache_check(&rsi_cache, &rsip->h, &cache_upcall_chandle);
942 cache_read_lock(&rsi_cache);
943 valid = test_bit(CACHE_VALID, &rsip->h.flags);
945 set_current_state(TASK_INTERRUPTIBLE);
946 cache_read_unlock(&rsi_cache);
949 unsigned long timeout;
951 timeout = cfs_time_seconds(GSS_SVC_UPCALL_TIMEOUT);
952 schedule_timeout(timeout);
957 CWARN("waited %ds timeout, drop\n", GSS_SVC_UPCALL_TIMEOUT);
961 CDEBUG(D_SEC, "cache_check return ENOENT, drop\n");
964 /* if not the first check, we have to release the extra
965 * reference we just added on it. */
967 cache_put(&rsip->h, &rsi_cache);
968 CDEBUG(D_SEC, "cache_check is good\n");
972 remove_wait_queue(&rsip->waitq, &wait);
973 cache_put(&rsip->h, &rsi_cache);
976 GOTO(out, rc = SECSVC_DROP);
979 rsci = gss_svc_searchbyctx(&rsip->out_handle);
981 CERROR("authentication failed\n");
983 /* gss mechanism returned major and minor code so we return
984 * those in error message */
985 if (!gss_pack_err_notify(req, rsip->major_status,
987 rc = SECSVC_COMPLETE;
992 grctx->src_ctx = &rsci->ctx;
995 if (gw->gw_flags & LUSTRE_GSS_PACK_KCSUM) {
996 grctx->src_ctx->gsc_mechctx->hash_func = gss_digest_hash;
997 } else if (!strcmp(grctx->src_ctx->gsc_mechctx->mech_type->gm_name,
999 !krb5_allow_old_client_csum) {
1000 CWARN("%s: deny connection from '%s' due to missing 'krb_csum' feature, set 'sptlrpc.gss.krb5_allow_old_client_csum=1' to allow, but recommend client upgrade: rc = %d\n",
1001 target->obd_name, libcfs_nid2str(req->rq_peer.nid),
1003 GOTO(out, rc = SECSVC_DROP);
1005 grctx->src_ctx->gsc_mechctx->hash_func =
1006 gss_digest_hash_compat;
1009 if (rawobj_dup(&rsci->ctx.gsc_rvs_hdl, rvs_hdl)) {
1010 CERROR("failed duplicate reverse handle\n");
1014 rsci->target = target;
1016 CDEBUG(D_SEC, "server create rsc %p(%u->%s)\n",
1017 rsci, rsci->ctx.gsc_uid, libcfs_nid2str(req->rq_peer.nid));
1019 if (rsip->out_handle.len > PTLRPC_GSS_MAX_HANDLE_SIZE) {
1020 CERROR("handle size %u too large\n", rsip->out_handle.len);
1021 GOTO(out, rc = SECSVC_DROP);
1024 grctx->src_init = 1;
1025 grctx->src_reserve_len = cfs_size_round4(rsip->out_token.len);
1027 rc = lustre_pack_reply_v2(req, 1, &replen, NULL, 0);
1029 CERROR("failed to pack reply: %d\n", rc);
1030 GOTO(out, rc = SECSVC_DROP);
1033 rs = req->rq_reply_state;
1034 LASSERT(rs->rs_repbuf->lm_bufcount == 3);
1035 LASSERT(rs->rs_repbuf->lm_buflens[0] >=
1036 sizeof(*rephdr) + rsip->out_handle.len);
1037 LASSERT(rs->rs_repbuf->lm_buflens[2] >= rsip->out_token.len);
1039 rephdr = lustre_msg_buf(rs->rs_repbuf, 0, 0);
1040 rephdr->gh_version = PTLRPC_GSS_VERSION;
1041 rephdr->gh_flags = 0;
1042 rephdr->gh_proc = PTLRPC_GSS_PROC_ERR;
1043 rephdr->gh_major = rsip->major_status;
1044 rephdr->gh_minor = rsip->minor_status;
1045 rephdr->gh_seqwin = GSS_SEQ_WIN;
1046 rephdr->gh_handle.len = rsip->out_handle.len;
1047 memcpy(rephdr->gh_handle.data, rsip->out_handle.data,
1048 rsip->out_handle.len);
1050 memcpy(lustre_msg_buf(rs->rs_repbuf, 2, 0), rsip->out_token.data,
1051 rsip->out_token.len);
1053 rs->rs_repdata_len = lustre_shrink_msg(rs->rs_repbuf, 2,
1054 rsip->out_token.len, 0);
1059 /* it looks like here we should put rsip also, but this mess up
1060 * with NFS cache mgmt code... FIXME
1063 * rsi_put(&rsip->h, &rsi_cache); */
1066 /* if anything went wrong, we don't keep the context too */
1067 if (rc != SECSVC_OK)
1068 set_bit(CACHE_NEGATIVE, &rsci->h.flags);
1070 CDEBUG(D_SEC, "create rsc with idx %#llx\n",
1071 gss_handle_to_u64(&rsci->handle));
1073 COMPAT_RSC_PUT(&rsci->h, &rsc_cache);
1078 struct gss_svc_ctx *gss_svc_upcall_get_ctx(struct ptlrpc_request *req,
1079 struct gss_wire_ctx *gw)
1083 rsc = gss_svc_searchbyctx(&gw->gw_handle);
1085 CWARN("Invalid gss ctx idx %#llx from %s\n",
1086 gss_handle_to_u64(&gw->gw_handle),
1087 libcfs_nid2str(req->rq_peer.nid));
1094 void gss_svc_upcall_put_ctx(struct gss_svc_ctx *ctx)
1096 struct rsc *rsc = container_of(ctx, struct rsc, ctx);
1098 COMPAT_RSC_PUT(&rsc->h, &rsc_cache);
1101 void gss_svc_upcall_destroy_ctx(struct gss_svc_ctx *ctx)
1103 struct rsc *rsc = container_of(ctx, struct rsc, ctx);
1105 /* can't be found */
1106 set_bit(CACHE_NEGATIVE, &rsc->h.flags);
1107 /* to be removed at next scan */
1108 rsc->h.expiry_time = 1;
1111 int __init gss_init_svc_upcall(void)
1116 * this helps reducing context index confliction. after server reboot,
1117 * conflicting request from clients might be filtered out by initial
1118 * sequence number checking, thus no chance to sent error notification
1121 get_random_bytes(&__ctx_index, sizeof(__ctx_index));
1123 rc = _cache_register_net(&rsi_cache, &init_net);
1127 rc = _cache_register_net(&rsc_cache, &init_net);
1129 _cache_unregister_net(&rsi_cache, &init_net);
1133 /* FIXME this looks stupid. we intend to give lsvcgssd a chance to open
1134 * the init upcall channel, otherwise there's big chance that the first
1135 * upcall issued before the channel be opened thus nfsv4 cache code will
1136 * drop the request directly, thus lead to unnecessary recovery time.
1137 * Here we wait at minimum 1.5 seconds.
1139 for (i = 0; i < 6; i++) {
1140 if (channel_users(&rsi_cache) > 0)
1142 set_current_state(TASK_UNINTERRUPTIBLE);
1143 schedule_timeout(cfs_time_seconds(1) / 4);
1146 if (channel_users(&rsi_cache) == 0)
1147 CWARN("Init channel is not opened by lsvcgssd, following "
1148 "request might be dropped until lsvcgssd is active\n");
1153 void gss_exit_svc_upcall(void)
1155 cache_purge(&rsi_cache);
1156 _cache_unregister_net(&rsi_cache, &init_net);
1158 cache_purge(&rsc_cache);
1159 _cache_unregister_net(&rsc_cache, &init_net);