2 * Modifications for Lustre
4 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
6 * Copyright (c) 2012, Whamcloud, Inc.
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
52 #include <linux/types.h>
53 #include <linux/init.h>
54 #include <linux/module.h>
55 #include <linux/slab.h>
56 #include <linux/hash.h>
57 #include <linux/mutex.h>
58 #include <linux/sunrpc/cache.h>
60 #include <liblustre.h>
64 #include <obd_class.h>
65 #include <obd_support.h>
66 #include <lustre/lustre_idl.h>
67 #include <lustre_net.h>
68 #include <lustre_import.h>
69 #include <lustre_sec.h>
72 #include "gss_internal.h"
75 #define GSS_SVC_UPCALL_TIMEOUT (20)
77 static spinlock_t __ctx_index_lock;
78 static __u64 __ctx_index;
80 __u64 gss_get_next_ctx_index(void)
84 spin_lock(&__ctx_index_lock);
86 spin_unlock(&__ctx_index_lock);
91 static inline unsigned long hash_mem(char *buf, int length, int bits)
93 unsigned long hash = 0;
108 if ((len & (BITS_PER_LONG/8-1)) == 0)
109 hash = cfs_hash_long(hash^l, BITS_PER_LONG);
112 return hash >> (BITS_PER_LONG - bits);
115 /****************************************
117 ****************************************/
119 #define RSI_HASHBITS (6)
120 #define RSI_HASHMAX (1 << RSI_HASHBITS)
121 #define RSI_HASHMASK (RSI_HASHMAX - 1)
128 rawobj_t in_handle, in_token;
129 rawobj_t out_handle, out_token;
130 int major_status, minor_status;
133 static struct cache_head *rsi_table[RSI_HASHMAX];
134 static struct cache_detail rsi_cache;
135 static struct rsi *rsi_update(struct rsi *new, struct rsi *old);
136 static struct rsi *rsi_lookup(struct rsi *item);
138 static inline int rsi_hash(struct rsi *item)
140 return hash_mem((char *)item->in_handle.data, item->in_handle.len,
142 hash_mem((char *)item->in_token.data, item->in_token.len,
146 static inline int __rsi_match(struct rsi *item, struct rsi *tmp)
148 return (rawobj_equal(&item->in_handle, &tmp->in_handle) &&
149 rawobj_equal(&item->in_token, &tmp->in_token));
152 static void rsi_free(struct rsi *rsi)
154 rawobj_free(&rsi->in_handle);
155 rawobj_free(&rsi->in_token);
156 rawobj_free(&rsi->out_handle);
157 rawobj_free(&rsi->out_token);
160 static void rsi_request(struct cache_detail *cd,
161 struct cache_head *h,
162 char **bpp, int *blen)
164 struct rsi *rsi = container_of(h, struct rsi, h);
167 /* if in_handle is null, provide kernel suggestion */
168 if (rsi->in_handle.len == 0)
169 index = gss_get_next_ctx_index();
171 qword_addhex(bpp, blen, (char *) &rsi->lustre_svc,
172 sizeof(rsi->lustre_svc));
173 qword_addhex(bpp, blen, (char *) &rsi->nid, sizeof(rsi->nid));
174 qword_addhex(bpp, blen, (char *) &index, sizeof(index));
175 qword_addhex(bpp, blen, rsi->in_handle.data, rsi->in_handle.len);
176 qword_addhex(bpp, blen, rsi->in_token.data, rsi->in_token.len);
180 #ifdef HAVE_CACHE_UPCALL
181 static int rsi_upcall(struct cache_detail *cd, struct cache_head *h)
183 return sunrpc_cache_pipe_upcall(cd, h, rsi_request);
187 static inline void __rsi_init(struct rsi *new, struct rsi *item)
189 new->out_handle = RAWOBJ_EMPTY;
190 new->out_token = RAWOBJ_EMPTY;
192 new->in_handle = item->in_handle;
193 item->in_handle = RAWOBJ_EMPTY;
194 new->in_token = item->in_token;
195 item->in_token = RAWOBJ_EMPTY;
197 new->lustre_svc = item->lustre_svc;
198 new->nid = item->nid;
199 cfs_waitq_init(&new->waitq);
202 static inline void __rsi_update(struct rsi *new, struct rsi *item)
204 LASSERT(new->out_handle.len == 0);
205 LASSERT(new->out_token.len == 0);
207 new->out_handle = item->out_handle;
208 item->out_handle = RAWOBJ_EMPTY;
209 new->out_token = item->out_token;
210 item->out_token = RAWOBJ_EMPTY;
212 new->major_status = item->major_status;
213 new->minor_status = item->minor_status;
216 static void rsi_put(struct kref *ref)
218 struct rsi *rsi = container_of(ref, struct rsi, h.ref);
220 LASSERT(rsi->h.next == NULL);
225 static int rsi_match(struct cache_head *a, struct cache_head *b)
227 struct rsi *item = container_of(a, struct rsi, h);
228 struct rsi *tmp = container_of(b, struct rsi, h);
230 return __rsi_match(item, tmp);
233 static void rsi_init(struct cache_head *cnew, struct cache_head *citem)
235 struct rsi *new = container_of(cnew, struct rsi, h);
236 struct rsi *item = container_of(citem, struct rsi, h);
238 __rsi_init(new, item);
241 static void update_rsi(struct cache_head *cnew, struct cache_head *citem)
243 struct rsi *new = container_of(cnew, struct rsi, h);
244 struct rsi *item = container_of(citem, struct rsi, h);
246 __rsi_update(new, item);
249 static struct cache_head *rsi_alloc(void)
260 static int rsi_parse(struct cache_detail *cd, char *mesg, int mlen)
265 struct rsi rsii, *rsip = NULL;
267 int status = -EINVAL;
271 memset(&rsii, 0, sizeof(rsii));
274 len = qword_get(&mesg, buf, mlen);
277 if (rawobj_alloc(&rsii.in_handle, buf, len)) {
283 len = qword_get(&mesg, buf, mlen);
286 if (rawobj_alloc(&rsii.in_token, buf, len)) {
291 rsip = rsi_lookup(&rsii);
297 expiry = get_expiry(&mesg);
301 len = qword_get(&mesg, buf, mlen);
306 rsii.major_status = simple_strtol(buf, &ep, 10);
311 len = qword_get(&mesg, buf, mlen);
314 rsii.minor_status = simple_strtol(buf, &ep, 10);
319 len = qword_get(&mesg, buf, mlen);
322 if (rawobj_alloc(&rsii.out_handle, buf, len)) {
328 len = qword_get(&mesg, buf, mlen);
331 if (rawobj_alloc(&rsii.out_token, buf, len)) {
336 rsii.h.expiry_time = expiry;
337 rsip = rsi_update(&rsii, rsip);
342 cfs_waitq_broadcast(&rsip->waitq);
343 cache_put(&rsip->h, &rsi_cache);
349 CERROR("rsi parse error %d\n", status);
353 static struct cache_detail rsi_cache = {
354 .hash_size = RSI_HASHMAX,
355 .hash_table = rsi_table,
356 .name = "auth.sptlrpc.init",
357 .cache_put = rsi_put,
358 #ifdef HAVE_CACHE_UPCALL
359 .cache_upcall = rsi_upcall,
361 .cache_request = rsi_request,
363 .cache_parse = rsi_parse,
366 .update = update_rsi,
370 static struct rsi *rsi_lookup(struct rsi *item)
372 struct cache_head *ch;
373 int hash = rsi_hash(item);
375 ch = sunrpc_cache_lookup(&rsi_cache, &item->h, hash);
377 return container_of(ch, struct rsi, h);
382 static struct rsi *rsi_update(struct rsi *new, struct rsi *old)
384 struct cache_head *ch;
385 int hash = rsi_hash(new);
387 ch = sunrpc_cache_update(&rsi_cache, &new->h, &old->h, hash);
389 return container_of(ch, struct rsi, h);
394 /****************************************
396 ****************************************/
398 #define RSC_HASHBITS (10)
399 #define RSC_HASHMAX (1 << RSC_HASHBITS)
400 #define RSC_HASHMASK (RSC_HASHMAX - 1)
404 struct obd_device *target;
406 struct gss_svc_ctx ctx;
409 static struct cache_head *rsc_table[RSC_HASHMAX];
410 static struct cache_detail rsc_cache;
411 static struct rsc *rsc_update(struct rsc *new, struct rsc *old);
412 static struct rsc *rsc_lookup(struct rsc *item);
414 static void rsc_free(struct rsc *rsci)
416 rawobj_free(&rsci->handle);
417 rawobj_free(&rsci->ctx.gsc_rvs_hdl);
418 lgss_delete_sec_context(&rsci->ctx.gsc_mechctx);
421 static inline int rsc_hash(struct rsc *rsci)
423 return hash_mem((char *)rsci->handle.data,
424 rsci->handle.len, RSC_HASHBITS);
427 static inline int __rsc_match(struct rsc *new, struct rsc *tmp)
429 return rawobj_equal(&new->handle, &tmp->handle);
432 static inline void __rsc_init(struct rsc *new, struct rsc *tmp)
434 new->handle = tmp->handle;
435 tmp->handle = RAWOBJ_EMPTY;
438 memset(&new->ctx, 0, sizeof(new->ctx));
439 new->ctx.gsc_rvs_hdl = RAWOBJ_EMPTY;
442 static inline void __rsc_update(struct rsc *new, struct rsc *tmp)
445 tmp->ctx.gsc_rvs_hdl = RAWOBJ_EMPTY;
446 tmp->ctx.gsc_mechctx = NULL;
448 memset(&new->ctx.gsc_seqdata, 0, sizeof(new->ctx.gsc_seqdata));
449 spin_lock_init(&new->ctx.gsc_seqdata.ssd_lock);
452 static void rsc_put(struct kref *ref)
454 struct rsc *rsci = container_of(ref, struct rsc, h.ref);
456 LASSERT(rsci->h.next == NULL);
461 static int rsc_match(struct cache_head *a, struct cache_head *b)
463 struct rsc *new = container_of(a, struct rsc, h);
464 struct rsc *tmp = container_of(b, struct rsc, h);
466 return __rsc_match(new, tmp);
469 static void rsc_init(struct cache_head *cnew, struct cache_head *ctmp)
471 struct rsc *new = container_of(cnew, struct rsc, h);
472 struct rsc *tmp = container_of(ctmp, struct rsc, h);
474 __rsc_init(new, tmp);
477 static void update_rsc(struct cache_head *cnew, struct cache_head *ctmp)
479 struct rsc *new = container_of(cnew, struct rsc, h);
480 struct rsc *tmp = container_of(ctmp, struct rsc, h);
482 __rsc_update(new, tmp);
485 static struct cache_head * rsc_alloc(void)
496 static int rsc_parse(struct cache_detail *cd, char *mesg, int mlen)
499 int len, rv, tmp_int;
500 struct rsc rsci, *rscp = NULL;
502 int status = -EINVAL;
503 struct gss_api_mech *gm = NULL;
505 memset(&rsci, 0, sizeof(rsci));
508 len = qword_get(&mesg, buf, mlen);
509 if (len < 0) goto out;
511 if (rawobj_alloc(&rsci.handle, buf, len))
516 expiry = get_expiry(&mesg);
522 rv = get_int(&mesg, &tmp_int);
524 CERROR("fail to get remote flag\n");
527 rsci.ctx.gsc_remote = (tmp_int != 0);
530 rv = get_int(&mesg, &tmp_int);
532 CERROR("fail to get oss user flag\n");
535 rsci.ctx.gsc_usr_root = (tmp_int != 0);
538 rv = get_int(&mesg, &tmp_int);
540 CERROR("fail to get mds user flag\n");
543 rsci.ctx.gsc_usr_mds = (tmp_int != 0);
546 rv = get_int(&mesg, &tmp_int);
548 CERROR("fail to get oss user flag\n");
551 rsci.ctx.gsc_usr_oss = (tmp_int != 0);
554 rv = get_int(&mesg, (int *) &rsci.ctx.gsc_mapped_uid);
556 CERROR("fail to get mapped uid\n");
560 rscp = rsc_lookup(&rsci);
564 /* uid, or NEGATIVE */
565 rv = get_int(&mesg, (int *) &rsci.ctx.gsc_uid);
569 CERROR("NOENT? set rsc entry negative\n");
570 set_bit(CACHE_NEGATIVE, &rsci.h.flags);
573 unsigned long ctx_expiry;
576 if (get_int(&mesg, (int *) &rsci.ctx.gsc_gid))
580 len = qword_get(&mesg, buf, mlen);
583 gm = lgss_name_to_mech(buf);
584 status = -EOPNOTSUPP;
589 /* mech-specific data: */
590 len = qword_get(&mesg, buf, mlen);
595 tmp_buf.data = (unsigned char *)buf;
596 if (lgss_import_sec_context(&tmp_buf, gm,
597 &rsci.ctx.gsc_mechctx))
600 /* currently the expiry time passed down from user-space
601 * is invalid, here we retrive it from mech. */
602 if (lgss_inquire_context(rsci.ctx.gsc_mechctx, &ctx_expiry)) {
603 CERROR("unable to get expire time, drop it\n");
606 expiry = (time_t) ctx_expiry;
609 rsci.h.expiry_time = expiry;
610 rscp = rsc_update(&rsci, rscp);
617 cache_put(&rscp->h, &rsc_cache);
622 CERROR("parse rsc error %d\n", status);
626 static struct cache_detail rsc_cache = {
627 .hash_size = RSC_HASHMAX,
628 .hash_table = rsc_table,
629 .name = "auth.sptlrpc.context",
630 .cache_put = rsc_put,
631 .cache_parse = rsc_parse,
634 .update = update_rsc,
638 static struct rsc *rsc_lookup(struct rsc *item)
640 struct cache_head *ch;
641 int hash = rsc_hash(item);
643 ch = sunrpc_cache_lookup(&rsc_cache, &item->h, hash);
645 return container_of(ch, struct rsc, h);
650 static struct rsc *rsc_update(struct rsc *new, struct rsc *old)
652 struct cache_head *ch;
653 int hash = rsc_hash(new);
655 ch = sunrpc_cache_update(&rsc_cache, &new->h, &old->h, hash);
657 return container_of(ch, struct rsc, h);
662 #define COMPAT_RSC_PUT(item, cd) cache_put((item), (cd))
664 /****************************************
666 ****************************************/
668 typedef int rsc_entry_match(struct rsc *rscp, long data);
670 static void rsc_flush(rsc_entry_match *match, long data)
672 struct cache_head **ch;
677 write_lock(&rsc_cache.hash_lock);
678 for (n = 0; n < RSC_HASHMAX; n++) {
679 for (ch = &rsc_cache.hash_table[n]; *ch;) {
680 rscp = container_of(*ch, struct rsc, h);
682 if (!match(rscp, data)) {
687 /* it seems simply set NEGATIVE doesn't work */
691 set_bit(CACHE_NEGATIVE, &rscp->h.flags);
692 COMPAT_RSC_PUT(&rscp->h, &rsc_cache);
696 write_unlock(&rsc_cache.hash_lock);
700 static int match_uid(struct rsc *rscp, long uid)
704 return ((int) rscp->ctx.gsc_uid == (int) uid);
707 static int match_target(struct rsc *rscp, long target)
709 return (rscp->target == (struct obd_device *) target);
712 static inline void rsc_flush_uid(int uid)
715 CWARN("flush all gss contexts...\n");
717 rsc_flush(match_uid, (long) uid);
720 static inline void rsc_flush_target(struct obd_device *target)
722 rsc_flush(match_target, (long) target);
725 void gss_secsvc_flush(struct obd_device *target)
727 rsc_flush_target(target);
729 EXPORT_SYMBOL(gss_secsvc_flush);
731 static struct rsc *gss_svc_searchbyctx(rawobj_t *handle)
736 memset(&rsci, 0, sizeof(rsci));
737 if (rawobj_dup(&rsci.handle, handle))
740 found = rsc_lookup(&rsci);
744 if (cache_check(&rsc_cache, &found->h, NULL))
749 int gss_svc_upcall_install_rvs_ctx(struct obd_import *imp,
750 struct gss_sec *gsec,
751 struct gss_cli_ctx *gctx)
753 struct rsc rsci, *rscp = NULL;
754 unsigned long ctx_expiry;
759 memset(&rsci, 0, sizeof(rsci));
761 if (rawobj_alloc(&rsci.handle, (char *) &gsec->gs_rvs_hdl,
762 sizeof(gsec->gs_rvs_hdl)))
763 GOTO(out, rc = -ENOMEM);
765 rscp = rsc_lookup(&rsci);
767 GOTO(out, rc = -ENOMEM);
769 major = lgss_copy_reverse_context(gctx->gc_mechctx,
770 &rsci.ctx.gsc_mechctx);
771 if (major != GSS_S_COMPLETE)
772 GOTO(out, rc = -ENOMEM);
774 if (lgss_inquire_context(rsci.ctx.gsc_mechctx, &ctx_expiry)) {
775 CERROR("unable to get expire time, drop it\n");
776 GOTO(out, rc = -EINVAL);
778 rsci.h.expiry_time = (time_t) ctx_expiry;
780 if (strcmp(imp->imp_obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0)
781 rsci.ctx.gsc_usr_mds = 1;
782 else if (strcmp(imp->imp_obd->obd_type->typ_name, LUSTRE_OSC_NAME) == 0)
783 rsci.ctx.gsc_usr_oss = 1;
785 rsci.ctx.gsc_usr_root = 1;
787 rscp = rsc_update(&rsci, rscp);
789 GOTO(out, rc = -ENOMEM);
791 rscp->target = imp->imp_obd;
792 rawobj_dup(&gctx->gc_svc_handle, &rscp->handle);
794 CWARN("create reverse svc ctx %p to %s: idx "LPX64"\n",
795 &rscp->ctx, obd2cli_tgt(imp->imp_obd), gsec->gs_rvs_hdl);
799 cache_put(&rscp->h, &rsc_cache);
803 CERROR("create reverse svc ctx: idx "LPX64", rc %d\n",
804 gsec->gs_rvs_hdl, rc);
808 int gss_svc_upcall_expire_rvs_ctx(rawobj_t *handle)
810 const cfs_time_t expire = 20;
813 rscp = gss_svc_searchbyctx(handle);
815 CDEBUG(D_SEC, "reverse svcctx %p (rsc %p) expire soon\n",
818 rscp->h.expiry_time = cfs_time_current_sec() + expire;
819 COMPAT_RSC_PUT(&rscp->h, &rsc_cache);
824 int gss_svc_upcall_dup_handle(rawobj_t *handle, struct gss_svc_ctx *ctx)
826 struct rsc *rscp = container_of(ctx, struct rsc, ctx);
828 return rawobj_dup(handle, &rscp->handle);
831 int gss_svc_upcall_update_sequence(rawobj_t *handle, __u32 seq)
835 rscp = gss_svc_searchbyctx(handle);
837 CDEBUG(D_SEC, "reverse svcctx %p (rsc %p) update seq to %u\n",
838 &rscp->ctx, rscp, seq + 1);
840 rscp->ctx.gsc_rvs_seq = seq + 1;
841 COMPAT_RSC_PUT(&rscp->h, &rsc_cache);
846 static struct cache_deferred_req* cache_upcall_defer(struct cache_req *req)
850 static struct cache_req cache_upcall_chandle = { cache_upcall_defer };
852 int gss_svc_upcall_handle_init(struct ptlrpc_request *req,
853 struct gss_svc_reqctx *grctx,
854 struct gss_wire_ctx *gw,
855 struct obd_device *target,
860 struct ptlrpc_reply_state *rs;
861 struct rsc *rsci = NULL;
862 struct rsi *rsip = NULL, rsikey;
864 int replen = sizeof(struct ptlrpc_body);
865 struct gss_rep_header *rephdr;
867 int rc = SECSVC_DROP;
870 memset(&rsikey, 0, sizeof(rsikey));
871 rsikey.lustre_svc = lustre_svc;
872 rsikey.nid = (__u64) req->rq_peer.nid;
874 /* duplicate context handle. for INIT it always 0 */
875 if (rawobj_dup(&rsikey.in_handle, &gw->gw_handle)) {
876 CERROR("fail to dup context handle\n");
880 if (rawobj_dup(&rsikey.in_token, in_token)) {
881 CERROR("can't duplicate token\n");
882 rawobj_free(&rsikey.in_handle);
886 rsip = rsi_lookup(&rsikey);
889 CERROR("error in rsi_lookup.\n");
891 if (!gss_pack_err_notify(req, GSS_S_FAILURE, 0))
892 rc = SECSVC_COMPLETE;
897 cache_get(&rsip->h); /* take an extra ref */
898 cfs_waitq_init(&rsip->waitq);
899 cfs_waitlink_init(&wait);
900 cfs_waitq_add(&rsip->waitq, &wait);
903 /* Note each time cache_check() will drop a reference if return
904 * non-zero. We hold an extra reference on initial rsip, but must
905 * take care of following calls. */
906 rc = cache_check(&rsi_cache, &rsip->h, &cache_upcall_chandle);
914 read_lock(&rsi_cache.hash_lock);
915 valid = test_bit(CACHE_VALID, &rsip->h.flags);
917 cfs_set_current_state(CFS_TASK_INTERRUPTIBLE);
918 read_unlock(&rsi_cache.hash_lock);
921 cfs_schedule_timeout(GSS_SVC_UPCALL_TIMEOUT *
927 CWARN("waited %ds timeout, drop\n", GSS_SVC_UPCALL_TIMEOUT);
931 CWARN("cache_check return ENOENT, drop\n");
934 /* if not the first check, we have to release the extra
935 * reference we just added on it. */
937 cache_put(&rsip->h, &rsi_cache);
938 CDEBUG(D_SEC, "cache_check is good\n");
942 cfs_waitq_del(&rsip->waitq, &wait);
943 cache_put(&rsip->h, &rsi_cache);
946 GOTO(out, rc = SECSVC_DROP);
949 rsci = gss_svc_searchbyctx(&rsip->out_handle);
951 CERROR("authentication failed\n");
953 if (!gss_pack_err_notify(req, GSS_S_FAILURE, 0))
954 rc = SECSVC_COMPLETE;
959 grctx->src_ctx = &rsci->ctx;
962 if (rawobj_dup(&rsci->ctx.gsc_rvs_hdl, rvs_hdl)) {
963 CERROR("failed duplicate reverse handle\n");
967 rsci->target = target;
969 CDEBUG(D_SEC, "server create rsc %p(%u->%s)\n",
970 rsci, rsci->ctx.gsc_uid, libcfs_nid2str(req->rq_peer.nid));
972 if (rsip->out_handle.len > PTLRPC_GSS_MAX_HANDLE_SIZE) {
973 CERROR("handle size %u too large\n", rsip->out_handle.len);
974 GOTO(out, rc = SECSVC_DROP);
978 grctx->src_reserve_len = cfs_size_round4(rsip->out_token.len);
980 rc = lustre_pack_reply_v2(req, 1, &replen, NULL, 0);
982 CERROR("failed to pack reply: %d\n", rc);
983 GOTO(out, rc = SECSVC_DROP);
986 rs = req->rq_reply_state;
987 LASSERT(rs->rs_repbuf->lm_bufcount == 3);
988 LASSERT(rs->rs_repbuf->lm_buflens[0] >=
989 sizeof(*rephdr) + rsip->out_handle.len);
990 LASSERT(rs->rs_repbuf->lm_buflens[2] >= rsip->out_token.len);
992 rephdr = lustre_msg_buf(rs->rs_repbuf, 0, 0);
993 rephdr->gh_version = PTLRPC_GSS_VERSION;
994 rephdr->gh_flags = 0;
995 rephdr->gh_proc = PTLRPC_GSS_PROC_ERR;
996 rephdr->gh_major = rsip->major_status;
997 rephdr->gh_minor = rsip->minor_status;
998 rephdr->gh_seqwin = GSS_SEQ_WIN;
999 rephdr->gh_handle.len = rsip->out_handle.len;
1000 memcpy(rephdr->gh_handle.data, rsip->out_handle.data,
1001 rsip->out_handle.len);
1003 memcpy(lustre_msg_buf(rs->rs_repbuf, 2, 0), rsip->out_token.data,
1004 rsip->out_token.len);
1006 rs->rs_repdata_len = lustre_shrink_msg(rs->rs_repbuf, 2,
1007 rsip->out_token.len, 0);
1012 /* it looks like here we should put rsip also, but this mess up
1013 * with NFS cache mgmt code... FIXME */
1016 rsi_put(&rsip->h, &rsi_cache);
1020 /* if anything went wrong, we don't keep the context too */
1021 if (rc != SECSVC_OK)
1022 set_bit(CACHE_NEGATIVE, &rsci->h.flags);
1024 CDEBUG(D_SEC, "create rsc with idx "LPX64"\n",
1025 gss_handle_to_u64(&rsci->handle));
1027 COMPAT_RSC_PUT(&rsci->h, &rsc_cache);
1032 struct gss_svc_ctx *gss_svc_upcall_get_ctx(struct ptlrpc_request *req,
1033 struct gss_wire_ctx *gw)
1037 rsc = gss_svc_searchbyctx(&gw->gw_handle);
1039 CWARN("Invalid gss ctx idx "LPX64" from %s\n",
1040 gss_handle_to_u64(&gw->gw_handle),
1041 libcfs_nid2str(req->rq_peer.nid));
1048 void gss_svc_upcall_put_ctx(struct gss_svc_ctx *ctx)
1050 struct rsc *rsc = container_of(ctx, struct rsc, ctx);
1052 COMPAT_RSC_PUT(&rsc->h, &rsc_cache);
1055 void gss_svc_upcall_destroy_ctx(struct gss_svc_ctx *ctx)
1057 struct rsc *rsc = container_of(ctx, struct rsc, ctx);
1059 /* can't be found */
1060 set_bit(CACHE_NEGATIVE, &rsc->h.flags);
1061 /* to be removed at next scan */
1062 rsc->h.expiry_time = 1;
1065 int __init gss_init_svc_upcall(void)
1069 spin_lock_init(&__ctx_index_lock);
1071 * this helps reducing context index confliction. after server reboot,
1072 * conflicting request from clients might be filtered out by initial
1073 * sequence number checking, thus no chance to sent error notification
1076 cfs_get_random_bytes(&__ctx_index, sizeof(__ctx_index));
1079 cache_register(&rsi_cache);
1080 cache_register(&rsc_cache);
1082 /* FIXME this looks stupid. we intend to give lsvcgssd a chance to open
1083 * the init upcall channel, otherwise there's big chance that the first
1084 * upcall issued before the channel be opened thus nfsv4 cache code will
1085 * drop the request direclty, thus lead to unnecessary recovery time.
1086 * here we wait at miximum 1.5 seconds. */
1087 for (i = 0; i < 6; i++) {
1088 if (atomic_read(&rsi_cache.readers) > 0)
1090 cfs_set_current_state(TASK_UNINTERRUPTIBLE);
1091 LASSERT(CFS_HZ >= 4);
1092 cfs_schedule_timeout(CFS_HZ / 4);
1095 if (atomic_read(&rsi_cache.readers) == 0)
1096 CWARN("Init channel is not opened by lsvcgssd, following "
1097 "request might be dropped until lsvcgssd is active\n");
1102 void __exit gss_exit_svc_upcall(void)
1104 cache_purge(&rsi_cache);
1105 cache_unregister(&rsi_cache);
1107 cache_purge(&rsc_cache);
1108 cache_unregister(&rsc_cache);