2 * Modifications for Lustre
4 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
6 * Copyright (c) 2012, Intel Corporation.
8 * Author: Eric Mei <ericm@clusterfs.com>
12 * 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)
127 wait_queue_head_t waitq;
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_SUNRPC_UPCALL_HAS_3ARGS
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 int rsi_upcall(struct cache_detail *cd, struct cache_head *h)
189 return sunrpc_cache_pipe_upcall(cd, h);
193 static inline void __rsi_init(struct rsi *new, struct rsi *item)
195 new->out_handle = RAWOBJ_EMPTY;
196 new->out_token = RAWOBJ_EMPTY;
198 new->in_handle = item->in_handle;
199 item->in_handle = RAWOBJ_EMPTY;
200 new->in_token = item->in_token;
201 item->in_token = RAWOBJ_EMPTY;
203 new->lustre_svc = item->lustre_svc;
204 new->nid = item->nid;
205 init_waitqueue_head(&new->waitq);
208 static inline void __rsi_update(struct rsi *new, struct rsi *item)
210 LASSERT(new->out_handle.len == 0);
211 LASSERT(new->out_token.len == 0);
213 new->out_handle = item->out_handle;
214 item->out_handle = RAWOBJ_EMPTY;
215 new->out_token = item->out_token;
216 item->out_token = RAWOBJ_EMPTY;
218 new->major_status = item->major_status;
219 new->minor_status = item->minor_status;
222 static void rsi_put(struct kref *ref)
224 struct rsi *rsi = container_of(ref, struct rsi, h.ref);
226 LASSERT(rsi->h.next == NULL);
231 static int rsi_match(struct cache_head *a, struct cache_head *b)
233 struct rsi *item = container_of(a, struct rsi, h);
234 struct rsi *tmp = container_of(b, struct rsi, h);
236 return __rsi_match(item, tmp);
239 static void rsi_init(struct cache_head *cnew, struct cache_head *citem)
241 struct rsi *new = container_of(cnew, struct rsi, h);
242 struct rsi *item = container_of(citem, struct rsi, h);
244 __rsi_init(new, item);
247 static void update_rsi(struct cache_head *cnew, struct cache_head *citem)
249 struct rsi *new = container_of(cnew, struct rsi, h);
250 struct rsi *item = container_of(citem, struct rsi, h);
252 __rsi_update(new, item);
255 static struct cache_head *rsi_alloc(void)
266 static int rsi_parse(struct cache_detail *cd, char *mesg, int mlen)
271 struct rsi rsii, *rsip = NULL;
273 int status = -EINVAL;
277 memset(&rsii, 0, sizeof(rsii));
280 len = qword_get(&mesg, buf, mlen);
283 if (rawobj_alloc(&rsii.in_handle, buf, len)) {
289 len = qword_get(&mesg, buf, mlen);
292 if (rawobj_alloc(&rsii.in_token, buf, len)) {
297 rsip = rsi_lookup(&rsii);
303 expiry = get_expiry(&mesg);
307 len = qword_get(&mesg, buf, mlen);
312 rsii.major_status = simple_strtol(buf, &ep, 10);
317 len = qword_get(&mesg, buf, mlen);
320 rsii.minor_status = simple_strtol(buf, &ep, 10);
325 len = qword_get(&mesg, buf, mlen);
328 if (rawobj_alloc(&rsii.out_handle, buf, len)) {
334 len = qword_get(&mesg, buf, mlen);
337 if (rawobj_alloc(&rsii.out_token, buf, len)) {
342 rsii.h.expiry_time = expiry;
343 rsip = rsi_update(&rsii, rsip);
348 wake_up_all(&rsip->waitq);
349 cache_put(&rsip->h, &rsi_cache);
355 CERROR("rsi parse error %d\n", status);
359 static struct cache_detail rsi_cache = {
360 .hash_size = RSI_HASHMAX,
361 .hash_table = rsi_table,
362 .name = "auth.sptlrpc.init",
363 .cache_put = rsi_put,
364 #ifndef HAVE_SUNRPC_UPCALL_HAS_3ARGS
365 .cache_request = rsi_request,
367 .cache_upcall = rsi_upcall,
368 .cache_parse = rsi_parse,
371 .update = update_rsi,
375 static struct rsi *rsi_lookup(struct rsi *item)
377 struct cache_head *ch;
378 int hash = rsi_hash(item);
380 ch = sunrpc_cache_lookup(&rsi_cache, &item->h, hash);
382 return container_of(ch, struct rsi, h);
387 static struct rsi *rsi_update(struct rsi *new, struct rsi *old)
389 struct cache_head *ch;
390 int hash = rsi_hash(new);
392 ch = sunrpc_cache_update(&rsi_cache, &new->h, &old->h, hash);
394 return container_of(ch, struct rsi, h);
399 /****************************************
401 ****************************************/
403 #define RSC_HASHBITS (10)
404 #define RSC_HASHMAX (1 << RSC_HASHBITS)
405 #define RSC_HASHMASK (RSC_HASHMAX - 1)
409 struct obd_device *target;
411 struct gss_svc_ctx ctx;
414 static struct cache_head *rsc_table[RSC_HASHMAX];
415 static struct cache_detail rsc_cache;
416 static struct rsc *rsc_update(struct rsc *new, struct rsc *old);
417 static struct rsc *rsc_lookup(struct rsc *item);
419 static void rsc_free(struct rsc *rsci)
421 rawobj_free(&rsci->handle);
422 rawobj_free(&rsci->ctx.gsc_rvs_hdl);
423 lgss_delete_sec_context(&rsci->ctx.gsc_mechctx);
426 static inline int rsc_hash(struct rsc *rsci)
428 return hash_mem((char *)rsci->handle.data,
429 rsci->handle.len, RSC_HASHBITS);
432 static inline int __rsc_match(struct rsc *new, struct rsc *tmp)
434 return rawobj_equal(&new->handle, &tmp->handle);
437 static inline void __rsc_init(struct rsc *new, struct rsc *tmp)
439 new->handle = tmp->handle;
440 tmp->handle = RAWOBJ_EMPTY;
443 memset(&new->ctx, 0, sizeof(new->ctx));
444 new->ctx.gsc_rvs_hdl = RAWOBJ_EMPTY;
447 static inline void __rsc_update(struct rsc *new, struct rsc *tmp)
450 tmp->ctx.gsc_rvs_hdl = RAWOBJ_EMPTY;
451 tmp->ctx.gsc_mechctx = NULL;
453 memset(&new->ctx.gsc_seqdata, 0, sizeof(new->ctx.gsc_seqdata));
454 spin_lock_init(&new->ctx.gsc_seqdata.ssd_lock);
457 static void rsc_put(struct kref *ref)
459 struct rsc *rsci = container_of(ref, struct rsc, h.ref);
461 LASSERT(rsci->h.next == NULL);
466 static int rsc_match(struct cache_head *a, struct cache_head *b)
468 struct rsc *new = container_of(a, struct rsc, h);
469 struct rsc *tmp = container_of(b, struct rsc, h);
471 return __rsc_match(new, tmp);
474 static void rsc_init(struct cache_head *cnew, struct cache_head *ctmp)
476 struct rsc *new = container_of(cnew, struct rsc, h);
477 struct rsc *tmp = container_of(ctmp, struct rsc, h);
479 __rsc_init(new, tmp);
482 static void update_rsc(struct cache_head *cnew, struct cache_head *ctmp)
484 struct rsc *new = container_of(cnew, struct rsc, h);
485 struct rsc *tmp = container_of(ctmp, struct rsc, h);
487 __rsc_update(new, tmp);
490 static struct cache_head * rsc_alloc(void)
501 static int rsc_parse(struct cache_detail *cd, char *mesg, int mlen)
504 int len, rv, tmp_int;
505 struct rsc rsci, *rscp = NULL;
507 int status = -EINVAL;
508 struct gss_api_mech *gm = NULL;
510 memset(&rsci, 0, sizeof(rsci));
513 len = qword_get(&mesg, buf, mlen);
514 if (len < 0) goto out;
516 if (rawobj_alloc(&rsci.handle, buf, len))
521 expiry = get_expiry(&mesg);
527 rv = get_int(&mesg, &tmp_int);
529 CERROR("fail to get remote flag\n");
532 rsci.ctx.gsc_remote = (tmp_int != 0);
535 rv = get_int(&mesg, &tmp_int);
537 CERROR("fail to get oss user flag\n");
540 rsci.ctx.gsc_usr_root = (tmp_int != 0);
543 rv = get_int(&mesg, &tmp_int);
545 CERROR("fail to get mds user flag\n");
548 rsci.ctx.gsc_usr_mds = (tmp_int != 0);
551 rv = get_int(&mesg, &tmp_int);
553 CERROR("fail to get oss user flag\n");
556 rsci.ctx.gsc_usr_oss = (tmp_int != 0);
559 rv = get_int(&mesg, (int *) &rsci.ctx.gsc_mapped_uid);
561 CERROR("fail to get mapped uid\n");
565 rscp = rsc_lookup(&rsci);
569 /* uid, or NEGATIVE */
570 rv = get_int(&mesg, (int *) &rsci.ctx.gsc_uid);
574 CERROR("NOENT? set rsc entry negative\n");
575 set_bit(CACHE_NEGATIVE, &rsci.h.flags);
578 unsigned long ctx_expiry;
581 if (get_int(&mesg, (int *) &rsci.ctx.gsc_gid))
585 len = qword_get(&mesg, buf, mlen);
588 gm = lgss_name_to_mech(buf);
589 status = -EOPNOTSUPP;
594 /* mech-specific data: */
595 len = qword_get(&mesg, buf, mlen);
600 tmp_buf.data = (unsigned char *)buf;
601 if (lgss_import_sec_context(&tmp_buf, gm,
602 &rsci.ctx.gsc_mechctx))
605 /* currently the expiry time passed down from user-space
606 * is invalid, here we retrive it from mech. */
607 if (lgss_inquire_context(rsci.ctx.gsc_mechctx, &ctx_expiry)) {
608 CERROR("unable to get expire time, drop it\n");
611 expiry = (time_t) ctx_expiry;
614 rsci.h.expiry_time = expiry;
615 rscp = rsc_update(&rsci, rscp);
622 cache_put(&rscp->h, &rsc_cache);
627 CERROR("parse rsc error %d\n", status);
631 static struct cache_detail rsc_cache = {
632 .hash_size = RSC_HASHMAX,
633 .hash_table = rsc_table,
634 .name = "auth.sptlrpc.context",
635 .cache_put = rsc_put,
636 .cache_parse = rsc_parse,
639 .update = update_rsc,
643 static struct rsc *rsc_lookup(struct rsc *item)
645 struct cache_head *ch;
646 int hash = rsc_hash(item);
648 ch = sunrpc_cache_lookup(&rsc_cache, &item->h, hash);
650 return container_of(ch, struct rsc, h);
655 static struct rsc *rsc_update(struct rsc *new, struct rsc *old)
657 struct cache_head *ch;
658 int hash = rsc_hash(new);
660 ch = sunrpc_cache_update(&rsc_cache, &new->h, &old->h, hash);
662 return container_of(ch, struct rsc, h);
667 #define COMPAT_RSC_PUT(item, cd) cache_put((item), (cd))
669 /****************************************
671 ****************************************/
673 typedef int rsc_entry_match(struct rsc *rscp, long data);
675 static void rsc_flush(rsc_entry_match *match, long data)
677 struct cache_head **ch;
682 write_lock(&rsc_cache.hash_lock);
683 for (n = 0; n < RSC_HASHMAX; n++) {
684 for (ch = &rsc_cache.hash_table[n]; *ch;) {
685 rscp = container_of(*ch, struct rsc, h);
687 if (!match(rscp, data)) {
692 /* it seems simply set NEGATIVE doesn't work */
696 set_bit(CACHE_NEGATIVE, &rscp->h.flags);
697 COMPAT_RSC_PUT(&rscp->h, &rsc_cache);
701 write_unlock(&rsc_cache.hash_lock);
705 static int match_uid(struct rsc *rscp, long uid)
709 return ((int) rscp->ctx.gsc_uid == (int) uid);
712 static int match_target(struct rsc *rscp, long target)
714 return (rscp->target == (struct obd_device *) target);
717 static inline void rsc_flush_uid(int uid)
720 CWARN("flush all gss contexts...\n");
722 rsc_flush(match_uid, (long) uid);
725 static inline void rsc_flush_target(struct obd_device *target)
727 rsc_flush(match_target, (long) target);
730 void gss_secsvc_flush(struct obd_device *target)
732 rsc_flush_target(target);
734 EXPORT_SYMBOL(gss_secsvc_flush);
736 static struct rsc *gss_svc_searchbyctx(rawobj_t *handle)
741 memset(&rsci, 0, sizeof(rsci));
742 if (rawobj_dup(&rsci.handle, handle))
745 found = rsc_lookup(&rsci);
749 if (cache_check(&rsc_cache, &found->h, NULL))
754 int gss_svc_upcall_install_rvs_ctx(struct obd_import *imp,
755 struct gss_sec *gsec,
756 struct gss_cli_ctx *gctx)
758 struct rsc rsci, *rscp = NULL;
759 unsigned long ctx_expiry;
764 memset(&rsci, 0, sizeof(rsci));
766 if (rawobj_alloc(&rsci.handle, (char *) &gsec->gs_rvs_hdl,
767 sizeof(gsec->gs_rvs_hdl)))
768 GOTO(out, rc = -ENOMEM);
770 rscp = rsc_lookup(&rsci);
772 GOTO(out, rc = -ENOMEM);
774 major = lgss_copy_reverse_context(gctx->gc_mechctx,
775 &rsci.ctx.gsc_mechctx);
776 if (major != GSS_S_COMPLETE)
777 GOTO(out, rc = -ENOMEM);
779 if (lgss_inquire_context(rsci.ctx.gsc_mechctx, &ctx_expiry)) {
780 CERROR("unable to get expire time, drop it\n");
781 GOTO(out, rc = -EINVAL);
783 rsci.h.expiry_time = (time_t) ctx_expiry;
785 if (strcmp(imp->imp_obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0)
786 rsci.ctx.gsc_usr_mds = 1;
787 else if (strcmp(imp->imp_obd->obd_type->typ_name, LUSTRE_OSC_NAME) == 0)
788 rsci.ctx.gsc_usr_oss = 1;
790 rsci.ctx.gsc_usr_root = 1;
792 rscp = rsc_update(&rsci, rscp);
794 GOTO(out, rc = -ENOMEM);
796 rscp->target = imp->imp_obd;
797 rawobj_dup(&gctx->gc_svc_handle, &rscp->handle);
799 CWARN("create reverse svc ctx %p to %s: idx "LPX64"\n",
800 &rscp->ctx, obd2cli_tgt(imp->imp_obd), gsec->gs_rvs_hdl);
804 cache_put(&rscp->h, &rsc_cache);
808 CERROR("create reverse svc ctx: idx "LPX64", rc %d\n",
809 gsec->gs_rvs_hdl, rc);
813 int gss_svc_upcall_expire_rvs_ctx(rawobj_t *handle)
815 const cfs_time_t expire = 20;
818 rscp = gss_svc_searchbyctx(handle);
820 CDEBUG(D_SEC, "reverse svcctx %p (rsc %p) expire soon\n",
823 rscp->h.expiry_time = cfs_time_current_sec() + expire;
824 COMPAT_RSC_PUT(&rscp->h, &rsc_cache);
829 int gss_svc_upcall_dup_handle(rawobj_t *handle, struct gss_svc_ctx *ctx)
831 struct rsc *rscp = container_of(ctx, struct rsc, ctx);
833 return rawobj_dup(handle, &rscp->handle);
836 int gss_svc_upcall_update_sequence(rawobj_t *handle, __u32 seq)
840 rscp = gss_svc_searchbyctx(handle);
842 CDEBUG(D_SEC, "reverse svcctx %p (rsc %p) update seq to %u\n",
843 &rscp->ctx, rscp, seq + 1);
845 rscp->ctx.gsc_rvs_seq = seq + 1;
846 COMPAT_RSC_PUT(&rscp->h, &rsc_cache);
851 static struct cache_deferred_req* cache_upcall_defer(struct cache_req *req)
855 static struct cache_req cache_upcall_chandle = { cache_upcall_defer };
857 int gss_svc_upcall_handle_init(struct ptlrpc_request *req,
858 struct gss_svc_reqctx *grctx,
859 struct gss_wire_ctx *gw,
860 struct obd_device *target,
865 struct ptlrpc_reply_state *rs;
866 struct rsc *rsci = NULL;
867 struct rsi *rsip = NULL, rsikey;
869 int replen = sizeof(struct ptlrpc_body);
870 struct gss_rep_header *rephdr;
872 int rc = SECSVC_DROP;
875 memset(&rsikey, 0, sizeof(rsikey));
876 rsikey.lustre_svc = lustre_svc;
877 rsikey.nid = (__u64) req->rq_peer.nid;
879 /* duplicate context handle. for INIT it always 0 */
880 if (rawobj_dup(&rsikey.in_handle, &gw->gw_handle)) {
881 CERROR("fail to dup context handle\n");
885 if (rawobj_dup(&rsikey.in_token, in_token)) {
886 CERROR("can't duplicate token\n");
887 rawobj_free(&rsikey.in_handle);
891 rsip = rsi_lookup(&rsikey);
894 CERROR("error in rsi_lookup.\n");
896 if (!gss_pack_err_notify(req, GSS_S_FAILURE, 0))
897 rc = SECSVC_COMPLETE;
902 cache_get(&rsip->h); /* take an extra ref */
903 init_waitqueue_head(&rsip->waitq);
904 init_waitqueue_entry_current(&wait);
905 add_wait_queue(&rsip->waitq, &wait);
908 /* Note each time cache_check() will drop a reference if return
909 * non-zero. We hold an extra reference on initial rsip, but must
910 * take care of following calls. */
911 rc = cache_check(&rsi_cache, &rsip->h, &cache_upcall_chandle);
920 read_lock(&rsi_cache.hash_lock);
921 valid = test_bit(CACHE_VALID, &rsip->h.flags);
923 set_current_state(TASK_INTERRUPTIBLE);
924 read_unlock(&rsi_cache.hash_lock);
927 schedule_timeout(GSS_SVC_UPCALL_TIMEOUT *
933 CWARN("waited %ds timeout, drop\n", GSS_SVC_UPCALL_TIMEOUT);
937 CWARN("cache_check return ENOENT, drop\n");
940 /* if not the first check, we have to release the extra
941 * reference we just added on it. */
943 cache_put(&rsip->h, &rsi_cache);
944 CDEBUG(D_SEC, "cache_check is good\n");
948 remove_wait_queue(&rsip->waitq, &wait);
949 cache_put(&rsip->h, &rsi_cache);
952 GOTO(out, rc = SECSVC_DROP);
955 rsci = gss_svc_searchbyctx(&rsip->out_handle);
957 CERROR("authentication failed\n");
959 if (!gss_pack_err_notify(req, GSS_S_FAILURE, 0))
960 rc = SECSVC_COMPLETE;
965 grctx->src_ctx = &rsci->ctx;
968 if (rawobj_dup(&rsci->ctx.gsc_rvs_hdl, rvs_hdl)) {
969 CERROR("failed duplicate reverse handle\n");
973 rsci->target = target;
975 CDEBUG(D_SEC, "server create rsc %p(%u->%s)\n",
976 rsci, rsci->ctx.gsc_uid, libcfs_nid2str(req->rq_peer.nid));
978 if (rsip->out_handle.len > PTLRPC_GSS_MAX_HANDLE_SIZE) {
979 CERROR("handle size %u too large\n", rsip->out_handle.len);
980 GOTO(out, rc = SECSVC_DROP);
984 grctx->src_reserve_len = cfs_size_round4(rsip->out_token.len);
986 rc = lustre_pack_reply_v2(req, 1, &replen, NULL, 0);
988 CERROR("failed to pack reply: %d\n", rc);
989 GOTO(out, rc = SECSVC_DROP);
992 rs = req->rq_reply_state;
993 LASSERT(rs->rs_repbuf->lm_bufcount == 3);
994 LASSERT(rs->rs_repbuf->lm_buflens[0] >=
995 sizeof(*rephdr) + rsip->out_handle.len);
996 LASSERT(rs->rs_repbuf->lm_buflens[2] >= rsip->out_token.len);
998 rephdr = lustre_msg_buf(rs->rs_repbuf, 0, 0);
999 rephdr->gh_version = PTLRPC_GSS_VERSION;
1000 rephdr->gh_flags = 0;
1001 rephdr->gh_proc = PTLRPC_GSS_PROC_ERR;
1002 rephdr->gh_major = rsip->major_status;
1003 rephdr->gh_minor = rsip->minor_status;
1004 rephdr->gh_seqwin = GSS_SEQ_WIN;
1005 rephdr->gh_handle.len = rsip->out_handle.len;
1006 memcpy(rephdr->gh_handle.data, rsip->out_handle.data,
1007 rsip->out_handle.len);
1009 memcpy(lustre_msg_buf(rs->rs_repbuf, 2, 0), rsip->out_token.data,
1010 rsip->out_token.len);
1012 rs->rs_repdata_len = lustre_shrink_msg(rs->rs_repbuf, 2,
1013 rsip->out_token.len, 0);
1018 /* it looks like here we should put rsip also, but this mess up
1019 * with NFS cache mgmt code... FIXME */
1022 rsi_put(&rsip->h, &rsi_cache);
1026 /* if anything went wrong, we don't keep the context too */
1027 if (rc != SECSVC_OK)
1028 set_bit(CACHE_NEGATIVE, &rsci->h.flags);
1030 CDEBUG(D_SEC, "create rsc with idx "LPX64"\n",
1031 gss_handle_to_u64(&rsci->handle));
1033 COMPAT_RSC_PUT(&rsci->h, &rsc_cache);
1038 struct gss_svc_ctx *gss_svc_upcall_get_ctx(struct ptlrpc_request *req,
1039 struct gss_wire_ctx *gw)
1043 rsc = gss_svc_searchbyctx(&gw->gw_handle);
1045 CWARN("Invalid gss ctx idx "LPX64" from %s\n",
1046 gss_handle_to_u64(&gw->gw_handle),
1047 libcfs_nid2str(req->rq_peer.nid));
1054 void gss_svc_upcall_put_ctx(struct gss_svc_ctx *ctx)
1056 struct rsc *rsc = container_of(ctx, struct rsc, ctx);
1058 COMPAT_RSC_PUT(&rsc->h, &rsc_cache);
1061 void gss_svc_upcall_destroy_ctx(struct gss_svc_ctx *ctx)
1063 struct rsc *rsc = container_of(ctx, struct rsc, ctx);
1065 /* can't be found */
1066 set_bit(CACHE_NEGATIVE, &rsc->h.flags);
1067 /* to be removed at next scan */
1068 rsc->h.expiry_time = 1;
1071 int __init gss_init_svc_upcall(void)
1075 spin_lock_init(&__ctx_index_lock);
1077 * this helps reducing context index confliction. after server reboot,
1078 * conflicting request from clients might be filtered out by initial
1079 * sequence number checking, thus no chance to sent error notification
1082 cfs_get_random_bytes(&__ctx_index, sizeof(__ctx_index));
1084 rc = cache_register_net(&rsi_cache, &init_net);
1088 rc = cache_register_net(&rsc_cache, &init_net);
1090 cache_unregister_net(&rsi_cache, &init_net);
1094 /* FIXME this looks stupid. we intend to give lsvcgssd a chance to open
1095 * the init upcall channel, otherwise there's big chance that the first
1096 * upcall issued before the channel be opened thus nfsv4 cache code will
1097 * drop the request direclty, thus lead to unnecessary recovery time.
1098 * here we wait at miximum 1.5 seconds. */
1099 for (i = 0; i < 6; i++) {
1100 if (atomic_read(&rsi_cache.readers) > 0)
1102 set_current_state(TASK_UNINTERRUPTIBLE);
1104 schedule_timeout(HZ / 4);
1107 if (atomic_read(&rsi_cache.readers) == 0)
1108 CWARN("Init channel is not opened by lsvcgssd, following "
1109 "request might be dropped until lsvcgssd is active\n");
1114 void gss_exit_svc_upcall(void)
1116 cache_purge(&rsi_cache);
1117 cache_unregister_net(&rsi_cache, &init_net);
1119 cache_purge(&rsc_cache);
1120 cache_unregister_net(&rsc_cache, &init_net);