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 static inline int rsi_hash(struct rsi *item)
168 return hash_mem((char *)item->in_handle.data, item->in_handle.len,
170 hash_mem((char *)item->in_token.data, item->in_token.len,
174 static inline int __rsi_match(struct rsi *item, struct rsi *tmp)
176 return (rawobj_equal(&item->in_handle, &tmp->in_handle) &&
177 rawobj_equal(&item->in_token, &tmp->in_token));
180 static void rsi_free(struct rsi *rsi)
182 rawobj_free(&rsi->in_handle);
183 rawobj_free(&rsi->in_token);
184 rawobj_free(&rsi->out_handle);
185 rawobj_free(&rsi->out_token);
188 /* See handle_channel_req() userspace for where the upcall data is read */
189 static void rsi_request(struct cache_detail *cd,
190 struct cache_head *h,
191 char **bpp, int *blen)
193 struct rsi *rsi = container_of(h, struct rsi, h);
196 /* if in_handle is null, provide kernel suggestion */
197 if (rsi->in_handle.len == 0)
198 index = gss_get_next_ctx_index();
200 qword_addhex(bpp, blen, (char *) &rsi->lustre_svc,
201 sizeof(rsi->lustre_svc));
202 qword_addhex(bpp, blen, (char *) &rsi->nid, sizeof(rsi->nid));
203 qword_addhex(bpp, blen, (char *) &index, sizeof(index));
204 qword_addhex(bpp, blen, (char *) rsi->nm_name,
205 strlen(rsi->nm_name) + 1);
206 qword_addhex(bpp, blen, rsi->in_handle.data, rsi->in_handle.len);
207 qword_addhex(bpp, blen, rsi->in_token.data, rsi->in_token.len);
211 #ifdef HAVE_SUNRPC_UPCALL_HAS_3ARGS
212 static int rsi_upcall(struct cache_detail *cd, struct cache_head *h)
214 return sunrpc_cache_pipe_upcall(cd, h, rsi_request);
218 static int rsi_upcall(struct cache_detail *cd, struct cache_head *h)
220 return sunrpc_cache_pipe_upcall(cd, h);
224 static inline void __rsi_init(struct rsi *new, struct rsi *item)
226 new->out_handle = RAWOBJ_EMPTY;
227 new->out_token = RAWOBJ_EMPTY;
229 new->in_handle = item->in_handle;
230 item->in_handle = RAWOBJ_EMPTY;
231 new->in_token = item->in_token;
232 item->in_token = RAWOBJ_EMPTY;
234 new->lustre_svc = item->lustre_svc;
235 new->nid = item->nid;
236 memcpy(new->nm_name, item->nm_name, sizeof(item->nm_name));
237 init_waitqueue_head(&new->waitq);
240 static inline void __rsi_update(struct rsi *new, struct rsi *item)
242 LASSERT(new->out_handle.len == 0);
243 LASSERT(new->out_token.len == 0);
245 new->out_handle = item->out_handle;
246 item->out_handle = RAWOBJ_EMPTY;
247 new->out_token = item->out_token;
248 item->out_token = RAWOBJ_EMPTY;
250 new->major_status = item->major_status;
251 new->minor_status = item->minor_status;
254 static void rsi_put(struct kref *ref)
256 struct rsi *rsi = container_of(ref, struct rsi, h.ref);
258 #ifdef HAVE_CACHE_HEAD_HLIST
259 LASSERT(rsi->h.cache_list.next == NULL);
261 LASSERT(rsi->h.next == NULL);
267 static int rsi_match(struct cache_head *a, struct cache_head *b)
269 struct rsi *item = container_of(a, struct rsi, h);
270 struct rsi *tmp = container_of(b, struct rsi, h);
272 return __rsi_match(item, tmp);
275 static void rsi_init(struct cache_head *cnew, struct cache_head *citem)
277 struct rsi *new = container_of(cnew, struct rsi, h);
278 struct rsi *item = container_of(citem, struct rsi, h);
280 __rsi_init(new, item);
283 static void update_rsi(struct cache_head *cnew, struct cache_head *citem)
285 struct rsi *new = container_of(cnew, struct rsi, h);
286 struct rsi *item = container_of(citem, struct rsi, h);
288 __rsi_update(new, item);
291 static struct cache_head *rsi_alloc(void)
302 static int rsi_parse(struct cache_detail *cd, char *mesg, int mlen)
306 struct rsi rsii, *rsip = NULL;
308 int status = -EINVAL;
312 memset(&rsii, 0, sizeof(rsii));
315 len = qword_get(&mesg, buf, mlen);
318 if (rawobj_alloc(&rsii.in_handle, buf, len)) {
324 len = qword_get(&mesg, buf, mlen);
327 if (rawobj_alloc(&rsii.in_token, buf, len)) {
332 rsip = rsi_lookup(&rsii);
338 expiry = get_expiry(&mesg);
342 len = qword_get(&mesg, buf, mlen);
347 status = kstrtoint(buf, 10, &rsii.major_status);
352 len = qword_get(&mesg, buf, mlen);
358 status = kstrtoint(buf, 10, &rsii.minor_status);
363 len = qword_get(&mesg, buf, mlen);
366 if (rawobj_alloc(&rsii.out_handle, buf, len)) {
372 len = qword_get(&mesg, buf, mlen);
375 if (rawobj_alloc(&rsii.out_token, buf, len)) {
380 rsii.h.expiry_time = expiry;
381 rsip = rsi_update(&rsii, rsip);
386 wake_up_all(&rsip->waitq);
387 cache_put(&rsip->h, &rsi_cache);
393 CERROR("rsi parse error %d\n", status);
397 static struct cache_detail rsi_cache = {
398 .hash_size = RSI_HASHMAX,
399 .hash_table = rsi_table,
400 .name = "auth.sptlrpc.init",
401 .cache_put = rsi_put,
402 #ifndef HAVE_SUNRPC_UPCALL_HAS_3ARGS
403 .cache_request = rsi_request,
405 .cache_upcall = rsi_upcall,
406 .cache_parse = rsi_parse,
409 .update = update_rsi,
413 static struct rsi *rsi_lookup(struct rsi *item)
415 struct cache_head *ch;
416 int hash = rsi_hash(item);
418 ch = sunrpc_cache_lookup(&rsi_cache, &item->h, hash);
420 return container_of(ch, struct rsi, h);
425 static struct rsi *rsi_update(struct rsi *new, struct rsi *old)
427 struct cache_head *ch;
428 int hash = rsi_hash(new);
430 ch = sunrpc_cache_update(&rsi_cache, &new->h, &old->h, hash);
432 return container_of(ch, struct rsi, h);
437 /****************************************
438 * rpc sec context (rsc) cache *
439 ****************************************/
441 #define RSC_HASHBITS (10)
442 #define RSC_HASHMAX (1 << RSC_HASHBITS)
443 #define RSC_HASHMASK (RSC_HASHMAX - 1)
447 struct obd_device *target;
449 struct gss_svc_ctx ctx;
452 #ifdef HAVE_CACHE_HEAD_HLIST
453 static struct hlist_head rsc_table[RSC_HASHMAX];
455 static struct cache_head *rsc_table[RSC_HASHMAX];
457 static struct cache_detail rsc_cache;
458 static struct rsc *rsc_update(struct rsc *new, struct rsc *old);
459 static struct rsc *rsc_lookup(struct rsc *item);
461 static void rsc_free(struct rsc *rsci)
463 rawobj_free(&rsci->handle);
464 rawobj_free(&rsci->ctx.gsc_rvs_hdl);
465 lgss_delete_sec_context(&rsci->ctx.gsc_mechctx);
468 static inline int rsc_hash(struct rsc *rsci)
470 return hash_mem((char *)rsci->handle.data,
471 rsci->handle.len, RSC_HASHBITS);
474 static inline int __rsc_match(struct rsc *new, struct rsc *tmp)
476 return rawobj_equal(&new->handle, &tmp->handle);
479 static inline void __rsc_init(struct rsc *new, struct rsc *tmp)
481 new->handle = tmp->handle;
482 tmp->handle = RAWOBJ_EMPTY;
485 memset(&new->ctx, 0, sizeof(new->ctx));
486 new->ctx.gsc_rvs_hdl = RAWOBJ_EMPTY;
489 static inline void __rsc_update(struct rsc *new, struct rsc *tmp)
492 tmp->ctx.gsc_rvs_hdl = RAWOBJ_EMPTY;
493 tmp->ctx.gsc_mechctx = NULL;
495 memset(&new->ctx.gsc_seqdata, 0, sizeof(new->ctx.gsc_seqdata));
496 spin_lock_init(&new->ctx.gsc_seqdata.ssd_lock);
499 static void rsc_put(struct kref *ref)
501 struct rsc *rsci = container_of(ref, struct rsc, h.ref);
503 #ifdef HAVE_CACHE_HEAD_HLIST
504 LASSERT(rsci->h.cache_list.next == NULL);
506 LASSERT(rsci->h.next == NULL);
512 static int rsc_match(struct cache_head *a, struct cache_head *b)
514 struct rsc *new = container_of(a, struct rsc, h);
515 struct rsc *tmp = container_of(b, struct rsc, h);
517 return __rsc_match(new, tmp);
520 static void rsc_init(struct cache_head *cnew, struct cache_head *ctmp)
522 struct rsc *new = container_of(cnew, struct rsc, h);
523 struct rsc *tmp = container_of(ctmp, struct rsc, h);
525 __rsc_init(new, tmp);
528 static void update_rsc(struct cache_head *cnew, struct cache_head *ctmp)
530 struct rsc *new = container_of(cnew, struct rsc, h);
531 struct rsc *tmp = container_of(ctmp, struct rsc, h);
533 __rsc_update(new, tmp);
536 static struct cache_head * rsc_alloc(void)
547 static int rsc_parse(struct cache_detail *cd, char *mesg, int mlen)
550 int len, rv, tmp_int;
551 struct rsc rsci, *rscp = NULL;
553 int status = -EINVAL;
554 struct gss_api_mech *gm = NULL;
556 memset(&rsci, 0, sizeof(rsci));
559 len = qword_get(&mesg, buf, mlen);
560 if (len < 0) goto out;
562 if (rawobj_alloc(&rsci.handle, buf, len))
567 expiry = get_expiry(&mesg);
573 rv = get_int(&mesg, &tmp_int);
575 CERROR("fail to get remote flag\n");
578 rsci.ctx.gsc_remote = (tmp_int != 0);
581 rv = get_int(&mesg, &tmp_int);
583 CERROR("fail to get root user flag\n");
586 rsci.ctx.gsc_usr_root = (tmp_int != 0);
589 rv = get_int(&mesg, &tmp_int);
591 CERROR("fail to get mds user flag\n");
594 rsci.ctx.gsc_usr_mds = (tmp_int != 0);
597 rv = get_int(&mesg, &tmp_int);
599 CERROR("fail to get oss user flag\n");
602 rsci.ctx.gsc_usr_oss = (tmp_int != 0);
605 rv = get_int(&mesg, (int *) &rsci.ctx.gsc_mapped_uid);
607 CERROR("fail to get mapped uid\n");
611 rscp = rsc_lookup(&rsci);
615 /* uid, or NEGATIVE */
616 rv = get_int(&mesg, (int *) &rsci.ctx.gsc_uid);
620 CERROR("NOENT? set rsc entry negative\n");
621 set_bit(CACHE_NEGATIVE, &rsci.h.flags);
627 if (get_int(&mesg, (int *) &rsci.ctx.gsc_gid))
631 len = qword_get(&mesg, buf, mlen);
634 gm = lgss_name_to_mech(buf);
635 status = -EOPNOTSUPP;
640 /* mech-specific data: */
641 len = qword_get(&mesg, buf, mlen);
646 tmp_buf.data = (unsigned char *)buf;
647 if (lgss_import_sec_context(&tmp_buf, gm,
648 &rsci.ctx.gsc_mechctx))
651 /* set to seconds since machine booted */
652 expiry = ktime_get_seconds();
654 /* currently the expiry time passed down from user-space
655 * is invalid, here we retrive it from mech.
657 if (lgss_inquire_context(rsci.ctx.gsc_mechctx, &ctx_expiry)) {
658 CERROR("unable to get expire time, drop it\n");
662 /* ctx_expiry is the number of seconds since Jan 1 1970.
663 * We want just the number of seconds into the future.
665 expiry += ctx_expiry - ktime_get_real_seconds();
668 rsci.h.expiry_time = expiry;
669 rscp = rsc_update(&rsci, rscp);
676 cache_put(&rscp->h, &rsc_cache);
681 CERROR("parse rsc error %d\n", status);
685 static struct cache_detail rsc_cache = {
686 .hash_size = RSC_HASHMAX,
687 .hash_table = rsc_table,
688 .name = "auth.sptlrpc.context",
689 .cache_put = rsc_put,
690 .cache_parse = rsc_parse,
693 .update = update_rsc,
697 static struct rsc *rsc_lookup(struct rsc *item)
699 struct cache_head *ch;
700 int hash = rsc_hash(item);
702 ch = sunrpc_cache_lookup(&rsc_cache, &item->h, hash);
704 return container_of(ch, struct rsc, h);
709 static struct rsc *rsc_update(struct rsc *new, struct rsc *old)
711 struct cache_head *ch;
712 int hash = rsc_hash(new);
714 ch = sunrpc_cache_update(&rsc_cache, &new->h, &old->h, hash);
716 return container_of(ch, struct rsc, h);
721 #define COMPAT_RSC_PUT(item, cd) cache_put((item), (cd))
723 /****************************************
725 ****************************************/
727 static struct rsc *gss_svc_searchbyctx(rawobj_t *handle)
732 memset(&rsci, 0, sizeof(rsci));
733 if (rawobj_dup(&rsci.handle, handle))
736 found = rsc_lookup(&rsci);
740 if (cache_check(&rsc_cache, &found->h, NULL))
745 int gss_svc_upcall_install_rvs_ctx(struct obd_import *imp,
746 struct gss_sec *gsec,
747 struct gss_cli_ctx *gctx)
749 struct rsc rsci, *rscp = NULL;
755 memset(&rsci, 0, sizeof(rsci));
757 if (rawobj_alloc(&rsci.handle, (char *) &gsec->gs_rvs_hdl,
758 sizeof(gsec->gs_rvs_hdl)))
759 GOTO(out, rc = -ENOMEM);
761 rscp = rsc_lookup(&rsci);
763 GOTO(out, rc = -ENOMEM);
765 major = lgss_copy_reverse_context(gctx->gc_mechctx,
766 &rsci.ctx.gsc_mechctx);
767 if (major != GSS_S_COMPLETE)
768 GOTO(out, rc = -ENOMEM);
770 if (lgss_inquire_context(rsci.ctx.gsc_mechctx, &ctx_expiry)) {
771 CERROR("unable to get expire time, drop it\n");
772 GOTO(out, rc = -EINVAL);
774 rsci.h.expiry_time = (time_t) ctx_expiry;
776 switch (imp->imp_obd->u.cli.cl_sp_to) {
778 rsci.ctx.gsc_usr_mds = 1;
781 rsci.ctx.gsc_usr_oss = 1;
784 rsci.ctx.gsc_usr_root = 1;
787 /* by convention, all 3 set to 1 means MGS */
788 rsci.ctx.gsc_usr_mds = 1;
789 rsci.ctx.gsc_usr_oss = 1;
790 rsci.ctx.gsc_usr_root = 1;
796 rscp = rsc_update(&rsci, rscp);
798 GOTO(out, rc = -ENOMEM);
800 rscp->target = imp->imp_obd;
801 rawobj_dup(&gctx->gc_svc_handle, &rscp->handle);
803 CWARN("create reverse svc ctx %p to %s: idx %#llx\n",
804 &rscp->ctx, obd2cli_tgt(imp->imp_obd), gsec->gs_rvs_hdl);
808 cache_put(&rscp->h, &rsc_cache);
812 CERROR("create reverse svc ctx: idx %#llx, rc %d\n",
813 gsec->gs_rvs_hdl, rc);
817 int gss_svc_upcall_expire_rvs_ctx(rawobj_t *handle)
819 const time64_t expire = 20;
822 rscp = gss_svc_searchbyctx(handle);
824 CDEBUG(D_SEC, "reverse svcctx %p (rsc %p) expire soon\n",
827 rscp->h.expiry_time = ktime_get_real_seconds() + expire;
828 COMPAT_RSC_PUT(&rscp->h, &rsc_cache);
833 int gss_svc_upcall_dup_handle(rawobj_t *handle, struct gss_svc_ctx *ctx)
835 struct rsc *rscp = container_of(ctx, struct rsc, ctx);
837 return rawobj_dup(handle, &rscp->handle);
840 int gss_svc_upcall_update_sequence(rawobj_t *handle, __u32 seq)
844 rscp = gss_svc_searchbyctx(handle);
846 CDEBUG(D_SEC, "reverse svcctx %p (rsc %p) update seq to %u\n",
847 &rscp->ctx, rscp, seq + 1);
849 rscp->ctx.gsc_rvs_seq = seq + 1;
850 COMPAT_RSC_PUT(&rscp->h, &rsc_cache);
855 static struct cache_deferred_req* cache_upcall_defer(struct cache_req *req)
859 static struct cache_req cache_upcall_chandle = { cache_upcall_defer };
861 int gss_svc_upcall_handle_init(struct ptlrpc_request *req,
862 struct gss_svc_reqctx *grctx,
863 struct gss_wire_ctx *gw,
864 struct obd_device *target,
869 struct ptlrpc_reply_state *rs;
870 struct rsc *rsci = NULL;
871 struct rsi *rsip = NULL, rsikey;
872 wait_queue_entry_t wait;
873 int replen = sizeof(struct ptlrpc_body);
874 struct gss_rep_header *rephdr;
876 int rc = SECSVC_DROP;
879 memset(&rsikey, 0, sizeof(rsikey));
880 rsikey.lustre_svc = lustre_svc;
881 /* In case of MR, rq_peer is not the NID from which request is received,
882 * but primary NID of peer.
883 * So we need rq_source, which contains the NID actually in use.
885 rsikey.nid = (__u64) req->rq_source.nid;
886 nodemap_test_nid(req->rq_peer.nid, rsikey.nm_name,
887 sizeof(rsikey.nm_name));
889 /* duplicate context handle. for INIT it always 0 */
890 if (rawobj_dup(&rsikey.in_handle, &gw->gw_handle)) {
891 CERROR("fail to dup context handle\n");
895 if (rawobj_dup(&rsikey.in_token, in_token)) {
896 CERROR("can't duplicate token\n");
897 rawobj_free(&rsikey.in_handle);
901 rsip = rsi_lookup(&rsikey);
904 CERROR("error in rsi_lookup.\n");
906 if (!gss_pack_err_notify(req, GSS_S_FAILURE, 0))
907 rc = SECSVC_COMPLETE;
912 cache_get(&rsip->h); /* take an extra ref */
913 init_waitqueue_head(&rsip->waitq);
914 init_waitqueue_entry(&wait, current);
915 add_wait_queue(&rsip->waitq, &wait);
918 /* Note each time cache_check() will drop a reference if return
919 * non-zero. We hold an extra reference on initial rsip, but must
920 * take care of following calls. */
921 rc = cache_check(&rsi_cache, &rsip->h, &cache_upcall_chandle);
930 read_lock(&rsi_cache.hash_lock);
931 valid = test_bit(CACHE_VALID, &rsip->h.flags);
933 set_current_state(TASK_INTERRUPTIBLE);
934 read_unlock(&rsi_cache.hash_lock);
937 unsigned long timeout;
939 timeout = cfs_time_seconds(GSS_SVC_UPCALL_TIMEOUT);
940 schedule_timeout(timeout);
945 CWARN("waited %ds timeout, drop\n", GSS_SVC_UPCALL_TIMEOUT);
949 CDEBUG(D_SEC, "cache_check return ENOENT, drop\n");
952 /* if not the first check, we have to release the extra
953 * reference we just added on it. */
955 cache_put(&rsip->h, &rsi_cache);
956 CDEBUG(D_SEC, "cache_check is good\n");
960 remove_wait_queue(&rsip->waitq, &wait);
961 cache_put(&rsip->h, &rsi_cache);
964 GOTO(out, rc = SECSVC_DROP);
967 rsci = gss_svc_searchbyctx(&rsip->out_handle);
969 CERROR("authentication failed\n");
971 /* gss mechanism returned major and minor code so we return
972 * those in error message */
973 if (!gss_pack_err_notify(req, rsip->major_status,
975 rc = SECSVC_COMPLETE;
980 grctx->src_ctx = &rsci->ctx;
983 if (gw->gw_flags & LUSTRE_GSS_PACK_KCSUM) {
984 grctx->src_ctx->gsc_mechctx->hash_func = gss_digest_hash;
985 } else if (!strcmp(grctx->src_ctx->gsc_mechctx->mech_type->gm_name,
987 !krb5_allow_old_client_csum) {
988 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",
989 target->obd_name, libcfs_nid2str(req->rq_peer.nid),
991 GOTO(out, rc = SECSVC_DROP);
993 grctx->src_ctx->gsc_mechctx->hash_func =
994 gss_digest_hash_compat;
997 if (rawobj_dup(&rsci->ctx.gsc_rvs_hdl, rvs_hdl)) {
998 CERROR("failed duplicate reverse handle\n");
1002 rsci->target = target;
1004 CDEBUG(D_SEC, "server create rsc %p(%u->%s)\n",
1005 rsci, rsci->ctx.gsc_uid, libcfs_nid2str(req->rq_peer.nid));
1007 if (rsip->out_handle.len > PTLRPC_GSS_MAX_HANDLE_SIZE) {
1008 CERROR("handle size %u too large\n", rsip->out_handle.len);
1009 GOTO(out, rc = SECSVC_DROP);
1012 grctx->src_init = 1;
1013 grctx->src_reserve_len = cfs_size_round4(rsip->out_token.len);
1015 rc = lustre_pack_reply_v2(req, 1, &replen, NULL, 0);
1017 CERROR("failed to pack reply: %d\n", rc);
1018 GOTO(out, rc = SECSVC_DROP);
1021 rs = req->rq_reply_state;
1022 LASSERT(rs->rs_repbuf->lm_bufcount == 3);
1023 LASSERT(rs->rs_repbuf->lm_buflens[0] >=
1024 sizeof(*rephdr) + rsip->out_handle.len);
1025 LASSERT(rs->rs_repbuf->lm_buflens[2] >= rsip->out_token.len);
1027 rephdr = lustre_msg_buf(rs->rs_repbuf, 0, 0);
1028 rephdr->gh_version = PTLRPC_GSS_VERSION;
1029 rephdr->gh_flags = 0;
1030 rephdr->gh_proc = PTLRPC_GSS_PROC_ERR;
1031 rephdr->gh_major = rsip->major_status;
1032 rephdr->gh_minor = rsip->minor_status;
1033 rephdr->gh_seqwin = GSS_SEQ_WIN;
1034 rephdr->gh_handle.len = rsip->out_handle.len;
1035 memcpy(rephdr->gh_handle.data, rsip->out_handle.data,
1036 rsip->out_handle.len);
1038 memcpy(lustre_msg_buf(rs->rs_repbuf, 2, 0), rsip->out_token.data,
1039 rsip->out_token.len);
1041 rs->rs_repdata_len = lustre_shrink_msg(rs->rs_repbuf, 2,
1042 rsip->out_token.len, 0);
1047 /* it looks like here we should put rsip also, but this mess up
1048 * with NFS cache mgmt code... FIXME
1051 * rsi_put(&rsip->h, &rsi_cache); */
1054 /* if anything went wrong, we don't keep the context too */
1055 if (rc != SECSVC_OK)
1056 set_bit(CACHE_NEGATIVE, &rsci->h.flags);
1058 CDEBUG(D_SEC, "create rsc with idx %#llx\n",
1059 gss_handle_to_u64(&rsci->handle));
1061 COMPAT_RSC_PUT(&rsci->h, &rsc_cache);
1066 struct gss_svc_ctx *gss_svc_upcall_get_ctx(struct ptlrpc_request *req,
1067 struct gss_wire_ctx *gw)
1071 rsc = gss_svc_searchbyctx(&gw->gw_handle);
1073 CWARN("Invalid gss ctx idx %#llx from %s\n",
1074 gss_handle_to_u64(&gw->gw_handle),
1075 libcfs_nid2str(req->rq_peer.nid));
1082 void gss_svc_upcall_put_ctx(struct gss_svc_ctx *ctx)
1084 struct rsc *rsc = container_of(ctx, struct rsc, ctx);
1086 COMPAT_RSC_PUT(&rsc->h, &rsc_cache);
1089 void gss_svc_upcall_destroy_ctx(struct gss_svc_ctx *ctx)
1091 struct rsc *rsc = container_of(ctx, struct rsc, ctx);
1093 /* can't be found */
1094 set_bit(CACHE_NEGATIVE, &rsc->h.flags);
1095 /* to be removed at next scan */
1096 rsc->h.expiry_time = 1;
1099 int __init gss_init_svc_upcall(void)
1104 * this helps reducing context index confliction. after server reboot,
1105 * conflicting request from clients might be filtered out by initial
1106 * sequence number checking, thus no chance to sent error notification
1109 get_random_bytes(&__ctx_index, sizeof(__ctx_index));
1111 rc = _cache_register_net(&rsi_cache, &init_net);
1115 rc = _cache_register_net(&rsc_cache, &init_net);
1117 _cache_unregister_net(&rsi_cache, &init_net);
1121 /* FIXME this looks stupid. we intend to give lsvcgssd a chance to open
1122 * the init upcall channel, otherwise there's big chance that the first
1123 * upcall issued before the channel be opened thus nfsv4 cache code will
1124 * drop the request directly, thus lead to unnecessary recovery time.
1125 * Here we wait at minimum 1.5 seconds.
1127 for (i = 0; i < 6; i++) {
1128 if (atomic_read(&rsi_cache.readers) > 0)
1130 set_current_state(TASK_UNINTERRUPTIBLE);
1131 schedule_timeout(cfs_time_seconds(1) / 4);
1134 if (atomic_read(&rsi_cache.readers) == 0)
1135 CWARN("Init channel is not opened by lsvcgssd, following "
1136 "request might be dropped until lsvcgssd is active\n");
1141 void gss_exit_svc_upcall(void)
1143 cache_purge(&rsi_cache);
1144 _cache_unregister_net(&rsi_cache, &init_net);
1146 cache_purge(&rsc_cache);
1147 _cache_unregister_net(&rsc_cache, &init_net);