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/slab.h>
55 #include <linux/hash.h>
56 #include <linux/mutex.h>
57 #include <linux/sunrpc/cache.h>
61 #include <obd_class.h>
62 #include <obd_support.h>
63 #include <lustre/lustre_idl.h>
64 #include <lustre_net.h>
65 #include <lustre_import.h>
66 #include <lustre_sec.h>
69 #include "gss_internal.h"
72 #define GSS_SVC_UPCALL_TIMEOUT (20)
74 static spinlock_t __ctx_index_lock;
75 static __u64 __ctx_index;
77 __u64 gss_get_next_ctx_index(void)
81 spin_lock(&__ctx_index_lock);
83 spin_unlock(&__ctx_index_lock);
88 static inline unsigned long hash_mem(char *buf, int length, int bits)
90 unsigned long hash = 0;
105 if ((len & (BITS_PER_LONG/8-1)) == 0)
106 hash = hash_long(hash^l, BITS_PER_LONG);
109 return hash >> (BITS_PER_LONG - bits);
112 /* This compatibility can be removed once kernel 3.3 is used,
113 * since cache_register_net/cache_unregister_net are exported.
114 * Note that since kernel 3.4 cache_register and cache_unregister
117 static inline int _cache_register_net(struct cache_detail *cd, struct net *net)
119 #ifdef HAVE_CACHE_REGISTER
120 return cache_register(cd);
122 return cache_register_net(cd, net);
125 static inline void _cache_unregister_net(struct cache_detail *cd,
128 #ifdef HAVE_CACHE_REGISTER
129 cache_unregister(cd);
131 cache_unregister_net(cd, net);
134 /****************************************
136 ****************************************/
138 #define RSI_HASHBITS (6)
139 #define RSI_HASHMAX (1 << RSI_HASHBITS)
140 #define RSI_HASHMASK (RSI_HASHMAX - 1)
146 wait_queue_head_t waitq;
147 rawobj_t in_handle, in_token;
148 rawobj_t out_handle, out_token;
149 int major_status, minor_status;
152 static struct cache_head *rsi_table[RSI_HASHMAX];
153 static struct cache_detail rsi_cache;
154 static struct rsi *rsi_update(struct rsi *new, struct rsi *old);
155 static struct rsi *rsi_lookup(struct rsi *item);
157 static inline int rsi_hash(struct rsi *item)
159 return hash_mem((char *)item->in_handle.data, item->in_handle.len,
161 hash_mem((char *)item->in_token.data, item->in_token.len,
165 static inline int __rsi_match(struct rsi *item, struct rsi *tmp)
167 return (rawobj_equal(&item->in_handle, &tmp->in_handle) &&
168 rawobj_equal(&item->in_token, &tmp->in_token));
171 static void rsi_free(struct rsi *rsi)
173 rawobj_free(&rsi->in_handle);
174 rawobj_free(&rsi->in_token);
175 rawobj_free(&rsi->out_handle);
176 rawobj_free(&rsi->out_token);
179 static void rsi_request(struct cache_detail *cd,
180 struct cache_head *h,
181 char **bpp, int *blen)
183 struct rsi *rsi = container_of(h, struct rsi, h);
186 /* if in_handle is null, provide kernel suggestion */
187 if (rsi->in_handle.len == 0)
188 index = gss_get_next_ctx_index();
190 qword_addhex(bpp, blen, (char *) &rsi->lustre_svc,
191 sizeof(rsi->lustre_svc));
192 qword_addhex(bpp, blen, (char *) &rsi->nid, sizeof(rsi->nid));
193 qword_addhex(bpp, blen, (char *) &index, sizeof(index));
194 qword_addhex(bpp, blen, rsi->in_handle.data, rsi->in_handle.len);
195 qword_addhex(bpp, blen, rsi->in_token.data, rsi->in_token.len);
199 #ifdef HAVE_SUNRPC_UPCALL_HAS_3ARGS
200 static int rsi_upcall(struct cache_detail *cd, struct cache_head *h)
202 return sunrpc_cache_pipe_upcall(cd, h, rsi_request);
206 static int rsi_upcall(struct cache_detail *cd, struct cache_head *h)
208 return sunrpc_cache_pipe_upcall(cd, h);
212 static inline void __rsi_init(struct rsi *new, struct rsi *item)
214 new->out_handle = RAWOBJ_EMPTY;
215 new->out_token = RAWOBJ_EMPTY;
217 new->in_handle = item->in_handle;
218 item->in_handle = RAWOBJ_EMPTY;
219 new->in_token = item->in_token;
220 item->in_token = RAWOBJ_EMPTY;
222 new->lustre_svc = item->lustre_svc;
223 new->nid = item->nid;
224 init_waitqueue_head(&new->waitq);
227 static inline void __rsi_update(struct rsi *new, struct rsi *item)
229 LASSERT(new->out_handle.len == 0);
230 LASSERT(new->out_token.len == 0);
232 new->out_handle = item->out_handle;
233 item->out_handle = RAWOBJ_EMPTY;
234 new->out_token = item->out_token;
235 item->out_token = RAWOBJ_EMPTY;
237 new->major_status = item->major_status;
238 new->minor_status = item->minor_status;
241 static void rsi_put(struct kref *ref)
243 struct rsi *rsi = container_of(ref, struct rsi, h.ref);
245 LASSERT(rsi->h.next == NULL);
250 static int rsi_match(struct cache_head *a, struct cache_head *b)
252 struct rsi *item = container_of(a, struct rsi, h);
253 struct rsi *tmp = container_of(b, struct rsi, h);
255 return __rsi_match(item, tmp);
258 static void rsi_init(struct cache_head *cnew, struct cache_head *citem)
260 struct rsi *new = container_of(cnew, struct rsi, h);
261 struct rsi *item = container_of(citem, struct rsi, h);
263 __rsi_init(new, item);
266 static void update_rsi(struct cache_head *cnew, struct cache_head *citem)
268 struct rsi *new = container_of(cnew, struct rsi, h);
269 struct rsi *item = container_of(citem, struct rsi, h);
271 __rsi_update(new, item);
274 static struct cache_head *rsi_alloc(void)
285 static int rsi_parse(struct cache_detail *cd, char *mesg, int mlen)
290 struct rsi rsii, *rsip = NULL;
292 int status = -EINVAL;
296 memset(&rsii, 0, sizeof(rsii));
299 len = qword_get(&mesg, buf, mlen);
302 if (rawobj_alloc(&rsii.in_handle, buf, len)) {
308 len = qword_get(&mesg, buf, mlen);
311 if (rawobj_alloc(&rsii.in_token, buf, len)) {
316 rsip = rsi_lookup(&rsii);
322 expiry = get_expiry(&mesg);
326 len = qword_get(&mesg, buf, mlen);
331 rsii.major_status = simple_strtol(buf, &ep, 10);
336 len = qword_get(&mesg, buf, mlen);
339 rsii.minor_status = simple_strtol(buf, &ep, 10);
344 len = qword_get(&mesg, buf, mlen);
347 if (rawobj_alloc(&rsii.out_handle, buf, len)) {
353 len = qword_get(&mesg, buf, mlen);
356 if (rawobj_alloc(&rsii.out_token, buf, len)) {
361 rsii.h.expiry_time = expiry;
362 rsip = rsi_update(&rsii, rsip);
367 wake_up_all(&rsip->waitq);
368 cache_put(&rsip->h, &rsi_cache);
374 CERROR("rsi parse error %d\n", status);
378 static struct cache_detail rsi_cache = {
379 .hash_size = RSI_HASHMAX,
380 .hash_table = rsi_table,
381 .name = "auth.sptlrpc.init",
382 .cache_put = rsi_put,
383 #ifndef HAVE_SUNRPC_UPCALL_HAS_3ARGS
384 .cache_request = rsi_request,
386 .cache_upcall = rsi_upcall,
387 .cache_parse = rsi_parse,
390 .update = update_rsi,
394 static struct rsi *rsi_lookup(struct rsi *item)
396 struct cache_head *ch;
397 int hash = rsi_hash(item);
399 ch = sunrpc_cache_lookup(&rsi_cache, &item->h, hash);
401 return container_of(ch, struct rsi, h);
406 static struct rsi *rsi_update(struct rsi *new, struct rsi *old)
408 struct cache_head *ch;
409 int hash = rsi_hash(new);
411 ch = sunrpc_cache_update(&rsi_cache, &new->h, &old->h, hash);
413 return container_of(ch, struct rsi, h);
418 /****************************************
420 ****************************************/
422 #define RSC_HASHBITS (10)
423 #define RSC_HASHMAX (1 << RSC_HASHBITS)
424 #define RSC_HASHMASK (RSC_HASHMAX - 1)
428 struct obd_device *target;
430 struct gss_svc_ctx ctx;
433 static struct cache_head *rsc_table[RSC_HASHMAX];
434 static struct cache_detail rsc_cache;
435 static struct rsc *rsc_update(struct rsc *new, struct rsc *old);
436 static struct rsc *rsc_lookup(struct rsc *item);
438 static void rsc_free(struct rsc *rsci)
440 rawobj_free(&rsci->handle);
441 rawobj_free(&rsci->ctx.gsc_rvs_hdl);
442 lgss_delete_sec_context(&rsci->ctx.gsc_mechctx);
445 static inline int rsc_hash(struct rsc *rsci)
447 return hash_mem((char *)rsci->handle.data,
448 rsci->handle.len, RSC_HASHBITS);
451 static inline int __rsc_match(struct rsc *new, struct rsc *tmp)
453 return rawobj_equal(&new->handle, &tmp->handle);
456 static inline void __rsc_init(struct rsc *new, struct rsc *tmp)
458 new->handle = tmp->handle;
459 tmp->handle = RAWOBJ_EMPTY;
462 memset(&new->ctx, 0, sizeof(new->ctx));
463 new->ctx.gsc_rvs_hdl = RAWOBJ_EMPTY;
466 static inline void __rsc_update(struct rsc *new, struct rsc *tmp)
469 tmp->ctx.gsc_rvs_hdl = RAWOBJ_EMPTY;
470 tmp->ctx.gsc_mechctx = NULL;
472 memset(&new->ctx.gsc_seqdata, 0, sizeof(new->ctx.gsc_seqdata));
473 spin_lock_init(&new->ctx.gsc_seqdata.ssd_lock);
476 static void rsc_put(struct kref *ref)
478 struct rsc *rsci = container_of(ref, struct rsc, h.ref);
480 LASSERT(rsci->h.next == NULL);
485 static int rsc_match(struct cache_head *a, struct cache_head *b)
487 struct rsc *new = container_of(a, struct rsc, h);
488 struct rsc *tmp = container_of(b, struct rsc, h);
490 return __rsc_match(new, tmp);
493 static void rsc_init(struct cache_head *cnew, struct cache_head *ctmp)
495 struct rsc *new = container_of(cnew, struct rsc, h);
496 struct rsc *tmp = container_of(ctmp, struct rsc, h);
498 __rsc_init(new, tmp);
501 static void update_rsc(struct cache_head *cnew, struct cache_head *ctmp)
503 struct rsc *new = container_of(cnew, struct rsc, h);
504 struct rsc *tmp = container_of(ctmp, struct rsc, h);
506 __rsc_update(new, tmp);
509 static struct cache_head * rsc_alloc(void)
520 static int rsc_parse(struct cache_detail *cd, char *mesg, int mlen)
523 int len, rv, tmp_int;
524 struct rsc rsci, *rscp = NULL;
526 int status = -EINVAL;
527 struct gss_api_mech *gm = NULL;
529 memset(&rsci, 0, sizeof(rsci));
532 len = qword_get(&mesg, buf, mlen);
533 if (len < 0) goto out;
535 if (rawobj_alloc(&rsci.handle, buf, len))
540 expiry = get_expiry(&mesg);
546 rv = get_int(&mesg, &tmp_int);
548 CERROR("fail to get remote flag\n");
551 rsci.ctx.gsc_remote = (tmp_int != 0);
554 rv = get_int(&mesg, &tmp_int);
556 CERROR("fail to get root user flag\n");
559 rsci.ctx.gsc_usr_root = (tmp_int != 0);
562 rv = get_int(&mesg, &tmp_int);
564 CERROR("fail to get mds user flag\n");
567 rsci.ctx.gsc_usr_mds = (tmp_int != 0);
570 rv = get_int(&mesg, &tmp_int);
572 CERROR("fail to get oss user flag\n");
575 rsci.ctx.gsc_usr_oss = (tmp_int != 0);
578 rv = get_int(&mesg, (int *) &rsci.ctx.gsc_mapped_uid);
580 CERROR("fail to get mapped uid\n");
584 rscp = rsc_lookup(&rsci);
588 /* uid, or NEGATIVE */
589 rv = get_int(&mesg, (int *) &rsci.ctx.gsc_uid);
593 CERROR("NOENT? set rsc entry negative\n");
594 set_bit(CACHE_NEGATIVE, &rsci.h.flags);
597 unsigned long ctx_expiry;
600 if (get_int(&mesg, (int *) &rsci.ctx.gsc_gid))
604 len = qword_get(&mesg, buf, mlen);
607 gm = lgss_name_to_mech(buf);
608 status = -EOPNOTSUPP;
613 /* mech-specific data: */
614 len = qword_get(&mesg, buf, mlen);
619 tmp_buf.data = (unsigned char *)buf;
620 if (lgss_import_sec_context(&tmp_buf, gm,
621 &rsci.ctx.gsc_mechctx))
624 /* currently the expiry time passed down from user-space
625 * is invalid, here we retrive it from mech. */
626 if (lgss_inquire_context(rsci.ctx.gsc_mechctx, &ctx_expiry)) {
627 CERROR("unable to get expire time, drop it\n");
630 expiry = (time_t) ctx_expiry;
633 rsci.h.expiry_time = expiry;
634 rscp = rsc_update(&rsci, rscp);
641 cache_put(&rscp->h, &rsc_cache);
646 CERROR("parse rsc error %d\n", status);
650 static struct cache_detail rsc_cache = {
651 .hash_size = RSC_HASHMAX,
652 .hash_table = rsc_table,
653 .name = "auth.sptlrpc.context",
654 .cache_put = rsc_put,
655 .cache_parse = rsc_parse,
658 .update = update_rsc,
662 static struct rsc *rsc_lookup(struct rsc *item)
664 struct cache_head *ch;
665 int hash = rsc_hash(item);
667 ch = sunrpc_cache_lookup(&rsc_cache, &item->h, hash);
669 return container_of(ch, struct rsc, h);
674 static struct rsc *rsc_update(struct rsc *new, struct rsc *old)
676 struct cache_head *ch;
677 int hash = rsc_hash(new);
679 ch = sunrpc_cache_update(&rsc_cache, &new->h, &old->h, hash);
681 return container_of(ch, struct rsc, h);
686 #define COMPAT_RSC_PUT(item, cd) cache_put((item), (cd))
688 /****************************************
690 ****************************************/
692 typedef int rsc_entry_match(struct rsc *rscp, long data);
694 static void rsc_flush(rsc_entry_match *match, long data)
696 struct cache_head **ch;
701 write_lock(&rsc_cache.hash_lock);
702 for (n = 0; n < RSC_HASHMAX; n++) {
703 for (ch = &rsc_cache.hash_table[n]; *ch;) {
704 rscp = container_of(*ch, struct rsc, h);
706 if (!match(rscp, data)) {
711 /* it seems simply set NEGATIVE doesn't work */
715 set_bit(CACHE_NEGATIVE, &rscp->h.flags);
716 COMPAT_RSC_PUT(&rscp->h, &rsc_cache);
720 write_unlock(&rsc_cache.hash_lock);
724 static int match_uid(struct rsc *rscp, long uid)
728 return ((int) rscp->ctx.gsc_uid == (int) uid);
731 static int match_target(struct rsc *rscp, long target)
733 return (rscp->target == (struct obd_device *) target);
736 static inline void rsc_flush_uid(int uid)
739 CWARN("flush all gss contexts...\n");
741 rsc_flush(match_uid, (long) uid);
744 static inline void rsc_flush_target(struct obd_device *target)
746 rsc_flush(match_target, (long) target);
749 void gss_secsvc_flush(struct obd_device *target)
751 rsc_flush_target(target);
754 static struct rsc *gss_svc_searchbyctx(rawobj_t *handle)
759 memset(&rsci, 0, sizeof(rsci));
760 if (rawobj_dup(&rsci.handle, handle))
763 found = rsc_lookup(&rsci);
767 if (cache_check(&rsc_cache, &found->h, NULL))
772 int gss_svc_upcall_install_rvs_ctx(struct obd_import *imp,
773 struct gss_sec *gsec,
774 struct gss_cli_ctx *gctx)
776 struct rsc rsci, *rscp = NULL;
777 unsigned long ctx_expiry;
782 memset(&rsci, 0, sizeof(rsci));
784 if (rawobj_alloc(&rsci.handle, (char *) &gsec->gs_rvs_hdl,
785 sizeof(gsec->gs_rvs_hdl)))
786 GOTO(out, rc = -ENOMEM);
788 rscp = rsc_lookup(&rsci);
790 GOTO(out, rc = -ENOMEM);
792 major = lgss_copy_reverse_context(gctx->gc_mechctx,
793 &rsci.ctx.gsc_mechctx);
794 if (major != GSS_S_COMPLETE)
795 GOTO(out, rc = -ENOMEM);
797 if (lgss_inquire_context(rsci.ctx.gsc_mechctx, &ctx_expiry)) {
798 CERROR("unable to get expire time, drop it\n");
799 GOTO(out, rc = -EINVAL);
801 rsci.h.expiry_time = (time_t) ctx_expiry;
803 if (strcmp(imp->imp_obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0)
804 rsci.ctx.gsc_usr_mds = 1;
805 else if (strcmp(imp->imp_obd->obd_type->typ_name, LUSTRE_OSC_NAME) == 0)
806 rsci.ctx.gsc_usr_oss = 1;
808 rsci.ctx.gsc_usr_root = 1;
810 rscp = rsc_update(&rsci, rscp);
812 GOTO(out, rc = -ENOMEM);
814 rscp->target = imp->imp_obd;
815 rawobj_dup(&gctx->gc_svc_handle, &rscp->handle);
817 CWARN("create reverse svc ctx %p to %s: idx "LPX64"\n",
818 &rscp->ctx, obd2cli_tgt(imp->imp_obd), gsec->gs_rvs_hdl);
822 cache_put(&rscp->h, &rsc_cache);
826 CERROR("create reverse svc ctx: idx "LPX64", rc %d\n",
827 gsec->gs_rvs_hdl, rc);
831 int gss_svc_upcall_expire_rvs_ctx(rawobj_t *handle)
833 const cfs_time_t expire = 20;
836 rscp = gss_svc_searchbyctx(handle);
838 CDEBUG(D_SEC, "reverse svcctx %p (rsc %p) expire soon\n",
841 rscp->h.expiry_time = cfs_time_current_sec() + expire;
842 COMPAT_RSC_PUT(&rscp->h, &rsc_cache);
847 int gss_svc_upcall_dup_handle(rawobj_t *handle, struct gss_svc_ctx *ctx)
849 struct rsc *rscp = container_of(ctx, struct rsc, ctx);
851 return rawobj_dup(handle, &rscp->handle);
854 int gss_svc_upcall_update_sequence(rawobj_t *handle, __u32 seq)
858 rscp = gss_svc_searchbyctx(handle);
860 CDEBUG(D_SEC, "reverse svcctx %p (rsc %p) update seq to %u\n",
861 &rscp->ctx, rscp, seq + 1);
863 rscp->ctx.gsc_rvs_seq = seq + 1;
864 COMPAT_RSC_PUT(&rscp->h, &rsc_cache);
869 static struct cache_deferred_req* cache_upcall_defer(struct cache_req *req)
873 static struct cache_req cache_upcall_chandle = { cache_upcall_defer };
875 int gss_svc_upcall_handle_init(struct ptlrpc_request *req,
876 struct gss_svc_reqctx *grctx,
877 struct gss_wire_ctx *gw,
878 struct obd_device *target,
883 struct ptlrpc_reply_state *rs;
884 struct rsc *rsci = NULL;
885 struct rsi *rsip = NULL, rsikey;
887 int replen = sizeof(struct ptlrpc_body);
888 struct gss_rep_header *rephdr;
890 int rc = SECSVC_DROP;
893 memset(&rsikey, 0, sizeof(rsikey));
894 rsikey.lustre_svc = lustre_svc;
895 rsikey.nid = (__u64) req->rq_peer.nid;
897 /* duplicate context handle. for INIT it always 0 */
898 if (rawobj_dup(&rsikey.in_handle, &gw->gw_handle)) {
899 CERROR("fail to dup context handle\n");
903 if (rawobj_dup(&rsikey.in_token, in_token)) {
904 CERROR("can't duplicate token\n");
905 rawobj_free(&rsikey.in_handle);
909 rsip = rsi_lookup(&rsikey);
912 CERROR("error in rsi_lookup.\n");
914 if (!gss_pack_err_notify(req, GSS_S_FAILURE, 0))
915 rc = SECSVC_COMPLETE;
920 cache_get(&rsip->h); /* take an extra ref */
921 init_waitqueue_head(&rsip->waitq);
922 init_waitqueue_entry(&wait, current);
923 add_wait_queue(&rsip->waitq, &wait);
926 /* Note each time cache_check() will drop a reference if return
927 * non-zero. We hold an extra reference on initial rsip, but must
928 * take care of following calls. */
929 rc = cache_check(&rsi_cache, &rsip->h, &cache_upcall_chandle);
938 read_lock(&rsi_cache.hash_lock);
939 valid = test_bit(CACHE_VALID, &rsip->h.flags);
941 set_current_state(TASK_INTERRUPTIBLE);
942 read_unlock(&rsi_cache.hash_lock);
945 unsigned long jiffies;
946 jiffies = msecs_to_jiffies(MSEC_PER_SEC *
947 GSS_SVC_UPCALL_TIMEOUT);
948 schedule_timeout(jiffies);
953 CWARN("waited %ds timeout, drop\n", GSS_SVC_UPCALL_TIMEOUT);
957 CWARN("cache_check return ENOENT, drop\n");
960 /* if not the first check, we have to release the extra
961 * reference we just added on it. */
963 cache_put(&rsip->h, &rsi_cache);
964 CDEBUG(D_SEC, "cache_check is good\n");
968 remove_wait_queue(&rsip->waitq, &wait);
969 cache_put(&rsip->h, &rsi_cache);
972 GOTO(out, rc = SECSVC_DROP);
975 rsci = gss_svc_searchbyctx(&rsip->out_handle);
977 CERROR("authentication failed\n");
979 if (!gss_pack_err_notify(req, GSS_S_FAILURE, 0))
980 rc = SECSVC_COMPLETE;
985 grctx->src_ctx = &rsci->ctx;
988 if (rawobj_dup(&rsci->ctx.gsc_rvs_hdl, rvs_hdl)) {
989 CERROR("failed duplicate reverse handle\n");
993 rsci->target = target;
995 CDEBUG(D_SEC, "server create rsc %p(%u->%s)\n",
996 rsci, rsci->ctx.gsc_uid, libcfs_nid2str(req->rq_peer.nid));
998 if (rsip->out_handle.len > PTLRPC_GSS_MAX_HANDLE_SIZE) {
999 CERROR("handle size %u too large\n", rsip->out_handle.len);
1000 GOTO(out, rc = SECSVC_DROP);
1003 grctx->src_init = 1;
1004 grctx->src_reserve_len = cfs_size_round4(rsip->out_token.len);
1006 rc = lustre_pack_reply_v2(req, 1, &replen, NULL, 0);
1008 CERROR("failed to pack reply: %d\n", rc);
1009 GOTO(out, rc = SECSVC_DROP);
1012 rs = req->rq_reply_state;
1013 LASSERT(rs->rs_repbuf->lm_bufcount == 3);
1014 LASSERT(rs->rs_repbuf->lm_buflens[0] >=
1015 sizeof(*rephdr) + rsip->out_handle.len);
1016 LASSERT(rs->rs_repbuf->lm_buflens[2] >= rsip->out_token.len);
1018 rephdr = lustre_msg_buf(rs->rs_repbuf, 0, 0);
1019 rephdr->gh_version = PTLRPC_GSS_VERSION;
1020 rephdr->gh_flags = 0;
1021 rephdr->gh_proc = PTLRPC_GSS_PROC_ERR;
1022 rephdr->gh_major = rsip->major_status;
1023 rephdr->gh_minor = rsip->minor_status;
1024 rephdr->gh_seqwin = GSS_SEQ_WIN;
1025 rephdr->gh_handle.len = rsip->out_handle.len;
1026 memcpy(rephdr->gh_handle.data, rsip->out_handle.data,
1027 rsip->out_handle.len);
1029 memcpy(lustre_msg_buf(rs->rs_repbuf, 2, 0), rsip->out_token.data,
1030 rsip->out_token.len);
1032 rs->rs_repdata_len = lustre_shrink_msg(rs->rs_repbuf, 2,
1033 rsip->out_token.len, 0);
1038 /* it looks like here we should put rsip also, but this mess up
1039 * with NFS cache mgmt code... FIXME */
1042 rsi_put(&rsip->h, &rsi_cache);
1046 /* if anything went wrong, we don't keep the context too */
1047 if (rc != SECSVC_OK)
1048 set_bit(CACHE_NEGATIVE, &rsci->h.flags);
1050 CDEBUG(D_SEC, "create rsc with idx "LPX64"\n",
1051 gss_handle_to_u64(&rsci->handle));
1053 COMPAT_RSC_PUT(&rsci->h, &rsc_cache);
1058 struct gss_svc_ctx *gss_svc_upcall_get_ctx(struct ptlrpc_request *req,
1059 struct gss_wire_ctx *gw)
1063 rsc = gss_svc_searchbyctx(&gw->gw_handle);
1065 CWARN("Invalid gss ctx idx "LPX64" from %s\n",
1066 gss_handle_to_u64(&gw->gw_handle),
1067 libcfs_nid2str(req->rq_peer.nid));
1074 void gss_svc_upcall_put_ctx(struct gss_svc_ctx *ctx)
1076 struct rsc *rsc = container_of(ctx, struct rsc, ctx);
1078 COMPAT_RSC_PUT(&rsc->h, &rsc_cache);
1081 void gss_svc_upcall_destroy_ctx(struct gss_svc_ctx *ctx)
1083 struct rsc *rsc = container_of(ctx, struct rsc, ctx);
1085 /* can't be found */
1086 set_bit(CACHE_NEGATIVE, &rsc->h.flags);
1087 /* to be removed at next scan */
1088 rsc->h.expiry_time = 1;
1091 int __init gss_init_svc_upcall(void)
1095 spin_lock_init(&__ctx_index_lock);
1097 * this helps reducing context index confliction. after server reboot,
1098 * conflicting request from clients might be filtered out by initial
1099 * sequence number checking, thus no chance to sent error notification
1102 cfs_get_random_bytes(&__ctx_index, sizeof(__ctx_index));
1104 rc = _cache_register_net(&rsi_cache, &init_net);
1108 rc = _cache_register_net(&rsc_cache, &init_net);
1110 _cache_unregister_net(&rsi_cache, &init_net);
1114 /* FIXME this looks stupid. we intend to give lsvcgssd a chance to open
1115 * the init upcall channel, otherwise there's big chance that the first
1116 * upcall issued before the channel be opened thus nfsv4 cache code will
1117 * drop the request direclty, thus lead to unnecessary recovery time.
1118 * here we wait at miximum 1.5 seconds. */
1119 for (i = 0; i < 6; i++) {
1120 if (atomic_read(&rsi_cache.readers) > 0)
1122 set_current_state(TASK_UNINTERRUPTIBLE);
1123 LASSERT(msecs_to_jiffies(MSEC_PER_SEC) >= 4);
1124 schedule_timeout(msecs_to_jiffies(MSEC_PER_SEC / 4));
1127 if (atomic_read(&rsi_cache.readers) == 0)
1128 CWARN("Init channel is not opened by lsvcgssd, following "
1129 "request might be dropped until lsvcgssd is active\n");
1134 void gss_exit_svc_upcall(void)
1136 cache_purge(&rsi_cache);
1137 _cache_unregister_net(&rsi_cache, &init_net);
1139 cache_purge(&rsc_cache);
1140 _cache_unregister_net(&rsc_cache, &init_net);