2 * Modifications for Lustre
4 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
6 * Copyright (c) 2011, 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
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>
60 #include <obd_class.h>
61 #include <obd_support.h>
62 #include <lustre/lustre_idl.h>
63 #include <lustre_net.h>
64 #include <lustre_import.h>
65 #include <lustre_sec.h>
68 #include "gss_internal.h"
71 #define GSS_SVC_UPCALL_TIMEOUT (20)
73 static spinlock_t __ctx_index_lock;
74 static __u64 __ctx_index;
76 __u64 gss_get_next_ctx_index(void)
80 spin_lock(&__ctx_index_lock);
82 spin_unlock(&__ctx_index_lock);
87 static inline unsigned long hash_mem(char *buf, int length, int bits)
89 unsigned long hash = 0;
104 if ((len & (BITS_PER_LONG/8-1)) == 0)
105 hash = cfs_hash_long(hash^l, BITS_PER_LONG);
108 return hash >> (BITS_PER_LONG - bits);
111 /****************************************
113 ****************************************/
115 #define RSI_HASHBITS (6)
116 #define RSI_HASHMAX (1 << RSI_HASHBITS)
117 #define RSI_HASHMASK (RSI_HASHMAX - 1)
123 wait_queue_head_t waitq;
124 rawobj_t in_handle, in_token;
125 rawobj_t out_handle, out_token;
126 int major_status, minor_status;
129 static struct cache_head *rsi_table[RSI_HASHMAX];
130 static struct cache_detail rsi_cache;
131 static struct rsi *rsi_update(struct rsi *new, struct rsi *old);
132 static struct rsi *rsi_lookup(struct rsi *item);
134 static inline int rsi_hash(struct rsi *item)
136 return hash_mem((char *)item->in_handle.data, item->in_handle.len,
138 hash_mem((char *)item->in_token.data, item->in_token.len,
142 static inline int __rsi_match(struct rsi *item, struct rsi *tmp)
144 return (rawobj_equal(&item->in_handle, &tmp->in_handle) &&
145 rawobj_equal(&item->in_token, &tmp->in_token));
148 static void rsi_free(struct rsi *rsi)
150 rawobj_free(&rsi->in_handle);
151 rawobj_free(&rsi->in_token);
152 rawobj_free(&rsi->out_handle);
153 rawobj_free(&rsi->out_token);
156 static void rsi_request(struct cache_detail *cd,
157 struct cache_head *h,
158 char **bpp, int *blen)
160 struct rsi *rsi = container_of(h, struct rsi, h);
163 /* if in_handle is null, provide kernel suggestion */
164 if (rsi->in_handle.len == 0)
165 index = gss_get_next_ctx_index();
167 qword_addhex(bpp, blen, (char *) &rsi->lustre_svc,
168 sizeof(rsi->lustre_svc));
169 qword_addhex(bpp, blen, (char *) &rsi->nid, sizeof(rsi->nid));
170 qword_addhex(bpp, blen, (char *) &index, sizeof(index));
171 qword_addhex(bpp, blen, rsi->in_handle.data, rsi->in_handle.len);
172 qword_addhex(bpp, blen, rsi->in_token.data, rsi->in_token.len);
176 static int rsi_upcall(struct cache_detail *cd, struct cache_head *h)
178 return sunrpc_cache_pipe_upcall(cd, h, rsi_request);
181 static inline void __rsi_init(struct rsi *new, struct rsi *item)
183 new->out_handle = RAWOBJ_EMPTY;
184 new->out_token = RAWOBJ_EMPTY;
186 new->in_handle = item->in_handle;
187 item->in_handle = RAWOBJ_EMPTY;
188 new->in_token = item->in_token;
189 item->in_token = RAWOBJ_EMPTY;
191 new->lustre_svc = item->lustre_svc;
192 new->nid = item->nid;
193 init_waitqueue_head(&new->waitq);
196 static inline void __rsi_update(struct rsi *new, struct rsi *item)
198 LASSERT(new->out_handle.len == 0);
199 LASSERT(new->out_token.len == 0);
201 new->out_handle = item->out_handle;
202 item->out_handle = RAWOBJ_EMPTY;
203 new->out_token = item->out_token;
204 item->out_token = RAWOBJ_EMPTY;
206 new->major_status = item->major_status;
207 new->minor_status = item->minor_status;
210 static void rsi_put(struct kref *ref)
212 struct rsi *rsi = container_of(ref, struct rsi, h.ref);
214 LASSERT(rsi->h.next == NULL);
219 static int rsi_match(struct cache_head *a, struct cache_head *b)
221 struct rsi *item = container_of(a, struct rsi, h);
222 struct rsi *tmp = container_of(b, struct rsi, h);
224 return __rsi_match(item, tmp);
227 static void rsi_init(struct cache_head *cnew, struct cache_head *citem)
229 struct rsi *new = container_of(cnew, struct rsi, h);
230 struct rsi *item = container_of(citem, struct rsi, h);
232 __rsi_init(new, item);
235 static void update_rsi(struct cache_head *cnew, struct cache_head *citem)
237 struct rsi *new = container_of(cnew, struct rsi, h);
238 struct rsi *item = container_of(citem, struct rsi, h);
240 __rsi_update(new, item);
243 static struct cache_head *rsi_alloc(void)
254 static int rsi_parse(struct cache_detail *cd, char *mesg, int mlen)
259 struct rsi rsii, *rsip = NULL;
261 int status = -EINVAL;
263 memset(&rsii, 0, sizeof(rsii));
266 len = qword_get(&mesg, buf, mlen);
269 if (rawobj_alloc(&rsii.in_handle, buf, len)) {
275 len = qword_get(&mesg, buf, mlen);
278 if (rawobj_alloc(&rsii.in_token, buf, len)) {
283 rsip = rsi_lookup(&rsii);
289 expiry = get_expiry(&mesg);
293 len = qword_get(&mesg, buf, mlen);
298 rsii.major_status = simple_strtol(buf, &ep, 10);
303 len = qword_get(&mesg, buf, mlen);
306 rsii.minor_status = simple_strtol(buf, &ep, 10);
311 len = qword_get(&mesg, buf, mlen);
314 if (rawobj_alloc(&rsii.out_handle, buf, len)) {
320 len = qword_get(&mesg, buf, mlen);
323 if (rawobj_alloc(&rsii.out_token, buf, len)) {
328 rsii.h.expiry_time = expiry;
329 rsip = rsi_update(&rsii, rsip);
334 wake_up_all(&rsip->waitq);
335 cache_put(&rsip->h, &rsi_cache);
341 CERROR("rsi parse error %d\n", status);
345 static struct cache_detail rsi_cache = {
346 .hash_size = RSI_HASHMAX,
347 .hash_table = rsi_table,
348 .name = "auth.sptlrpc.init",
349 .cache_put = rsi_put,
350 .cache_upcall = rsi_upcall,
351 .cache_parse = rsi_parse,
354 .update = update_rsi,
358 static struct rsi *rsi_lookup(struct rsi *item)
360 struct cache_head *ch;
361 int hash = rsi_hash(item);
363 ch = sunrpc_cache_lookup(&rsi_cache, &item->h, hash);
365 return container_of(ch, struct rsi, h);
370 static struct rsi *rsi_update(struct rsi *new, struct rsi *old)
372 struct cache_head *ch;
373 int hash = rsi_hash(new);
375 ch = sunrpc_cache_update(&rsi_cache, &new->h, &old->h, hash);
377 return container_of(ch, struct rsi, h);
382 /****************************************
384 ****************************************/
386 #define RSC_HASHBITS (10)
387 #define RSC_HASHMAX (1 << RSC_HASHBITS)
388 #define RSC_HASHMASK (RSC_HASHMAX - 1)
392 struct obd_device *target;
394 struct gss_svc_ctx ctx;
397 static struct cache_head *rsc_table[RSC_HASHMAX];
398 static struct cache_detail rsc_cache;
399 static struct rsc *rsc_update(struct rsc *new, struct rsc *old);
400 static struct rsc *rsc_lookup(struct rsc *item);
402 static void rsc_free(struct rsc *rsci)
404 rawobj_free(&rsci->handle);
405 rawobj_free(&rsci->ctx.gsc_rvs_hdl);
406 lgss_delete_sec_context(&rsci->ctx.gsc_mechctx);
409 static inline int rsc_hash(struct rsc *rsci)
411 return hash_mem((char *)rsci->handle.data,
412 rsci->handle.len, RSC_HASHBITS);
415 static inline int __rsc_match(struct rsc *new, struct rsc *tmp)
417 return rawobj_equal(&new->handle, &tmp->handle);
420 static inline void __rsc_init(struct rsc *new, struct rsc *tmp)
422 new->handle = tmp->handle;
423 tmp->handle = RAWOBJ_EMPTY;
426 memset(&new->ctx, 0, sizeof(new->ctx));
427 new->ctx.gsc_rvs_hdl = RAWOBJ_EMPTY;
430 static inline void __rsc_update(struct rsc *new, struct rsc *tmp)
433 tmp->ctx.gsc_rvs_hdl = RAWOBJ_EMPTY;
434 tmp->ctx.gsc_mechctx = NULL;
436 memset(&new->ctx.gsc_seqdata, 0, sizeof(new->ctx.gsc_seqdata));
437 spin_lock_init(&new->ctx.gsc_seqdata.ssd_lock);
440 static void rsc_put(struct kref *ref)
442 struct rsc *rsci = container_of(ref, struct rsc, h.ref);
444 LASSERT(rsci->h.next == NULL);
449 static int rsc_match(struct cache_head *a, struct cache_head *b)
451 struct rsc *new = container_of(a, struct rsc, h);
452 struct rsc *tmp = container_of(b, struct rsc, h);
454 return __rsc_match(new, tmp);
457 static void rsc_init(struct cache_head *cnew, struct cache_head *ctmp)
459 struct rsc *new = container_of(cnew, struct rsc, h);
460 struct rsc *tmp = container_of(ctmp, struct rsc, h);
462 __rsc_init(new, tmp);
465 static void update_rsc(struct cache_head *cnew, struct cache_head *ctmp)
467 struct rsc *new = container_of(cnew, struct rsc, h);
468 struct rsc *tmp = container_of(ctmp, struct rsc, h);
470 __rsc_update(new, tmp);
473 static struct cache_head * rsc_alloc(void)
484 static int rsc_parse(struct cache_detail *cd, char *mesg, int mlen)
487 int len, rv, tmp_int;
488 struct rsc rsci, *rscp = NULL;
490 int status = -EINVAL;
491 struct gss_api_mech *gm = NULL;
493 memset(&rsci, 0, sizeof(rsci));
496 len = qword_get(&mesg, buf, mlen);
497 if (len < 0) goto out;
499 if (rawobj_alloc(&rsci.handle, buf, len))
504 expiry = get_expiry(&mesg);
510 rv = get_int(&mesg, &tmp_int);
512 CERROR("fail to get remote flag\n");
515 rsci.ctx.gsc_remote = (tmp_int != 0);
518 rv = get_int(&mesg, &tmp_int);
520 CERROR("fail to get oss user flag\n");
523 rsci.ctx.gsc_usr_root = (tmp_int != 0);
526 rv = get_int(&mesg, &tmp_int);
528 CERROR("fail to get mds user flag\n");
531 rsci.ctx.gsc_usr_mds = (tmp_int != 0);
534 rv = get_int(&mesg, &tmp_int);
536 CERROR("fail to get oss user flag\n");
539 rsci.ctx.gsc_usr_oss = (tmp_int != 0);
542 rv = get_int(&mesg, (int *) &rsci.ctx.gsc_mapped_uid);
544 CERROR("fail to get mapped uid\n");
548 rscp = rsc_lookup(&rsci);
552 /* uid, or NEGATIVE */
553 rv = get_int(&mesg, (int *) &rsci.ctx.gsc_uid);
557 CERROR("NOENT? set rsc entry negative\n");
558 set_bit(CACHE_NEGATIVE, &rsci.h.flags);
561 unsigned long ctx_expiry;
564 if (get_int(&mesg, (int *) &rsci.ctx.gsc_gid))
568 len = qword_get(&mesg, buf, mlen);
571 gm = lgss_name_to_mech(buf);
572 status = -EOPNOTSUPP;
577 /* mech-specific data: */
578 len = qword_get(&mesg, buf, mlen);
583 tmp_buf.data = (unsigned char *)buf;
584 if (lgss_import_sec_context(&tmp_buf, gm,
585 &rsci.ctx.gsc_mechctx))
588 /* currently the expiry time passed down from user-space
589 * is invalid, here we retrive it from mech. */
590 if (lgss_inquire_context(rsci.ctx.gsc_mechctx, &ctx_expiry)) {
591 CERROR("unable to get expire time, drop it\n");
594 expiry = (time_t) ctx_expiry;
597 rsci.h.expiry_time = expiry;
598 rscp = rsc_update(&rsci, rscp);
605 cache_put(&rscp->h, &rsc_cache);
610 CERROR("parse rsc error %d\n", status);
614 static struct cache_detail rsc_cache = {
615 .hash_size = RSC_HASHMAX,
616 .hash_table = rsc_table,
617 .name = "auth.sptlrpc.context",
618 .cache_put = rsc_put,
619 .cache_parse = rsc_parse,
622 .update = update_rsc,
626 static struct rsc *rsc_lookup(struct rsc *item)
628 struct cache_head *ch;
629 int hash = rsc_hash(item);
631 ch = sunrpc_cache_lookup(&rsc_cache, &item->h, hash);
633 return container_of(ch, struct rsc, h);
638 static struct rsc *rsc_update(struct rsc *new, struct rsc *old)
640 struct cache_head *ch;
641 int hash = rsc_hash(new);
643 ch = sunrpc_cache_update(&rsc_cache, &new->h, &old->h, hash);
645 return container_of(ch, struct rsc, h);
650 #define COMPAT_RSC_PUT(item, cd) cache_put((item), (cd))
652 /****************************************
654 ****************************************/
656 typedef int rsc_entry_match(struct rsc *rscp, long data);
658 static void rsc_flush(rsc_entry_match *match, long data)
660 struct cache_head **ch;
664 write_lock(&rsc_cache.hash_lock);
665 for (n = 0; n < RSC_HASHMAX; n++) {
666 for (ch = &rsc_cache.hash_table[n]; *ch;) {
667 rscp = container_of(*ch, struct rsc, h);
669 if (!match(rscp, data)) {
674 /* it seems simply set NEGATIVE doesn't work */
678 set_bit(CACHE_NEGATIVE, &rscp->h.flags);
679 COMPAT_RSC_PUT(&rscp->h, &rsc_cache);
683 write_unlock(&rsc_cache.hash_lock);
686 static int match_uid(struct rsc *rscp, long uid)
690 return ((int) rscp->ctx.gsc_uid == (int) uid);
693 static int match_target(struct rsc *rscp, long target)
695 return (rscp->target == (struct obd_device *) target);
698 static inline void rsc_flush_uid(int uid)
701 CWARN("flush all gss contexts...\n");
703 rsc_flush(match_uid, (long) uid);
706 static inline void rsc_flush_target(struct obd_device *target)
708 rsc_flush(match_target, (long) target);
711 void gss_secsvc_flush(struct obd_device *target)
713 rsc_flush_target(target);
715 EXPORT_SYMBOL(gss_secsvc_flush);
717 static struct rsc *gss_svc_searchbyctx(rawobj_t *handle)
722 memset(&rsci, 0, sizeof(rsci));
723 if (rawobj_dup(&rsci.handle, handle))
726 found = rsc_lookup(&rsci);
730 if (cache_check(&rsc_cache, &found->h, NULL))
735 int gss_svc_upcall_install_rvs_ctx(struct obd_import *imp,
736 struct gss_sec *gsec,
737 struct gss_cli_ctx *gctx)
739 struct rsc rsci, *rscp = NULL;
740 unsigned long ctx_expiry;
744 memset(&rsci, 0, sizeof(rsci));
746 if (rawobj_alloc(&rsci.handle, (char *) &gsec->gs_rvs_hdl,
747 sizeof(gsec->gs_rvs_hdl)))
748 GOTO(out, rc = -ENOMEM);
750 rscp = rsc_lookup(&rsci);
752 GOTO(out, rc = -ENOMEM);
754 major = lgss_copy_reverse_context(gctx->gc_mechctx,
755 &rsci.ctx.gsc_mechctx);
756 if (major != GSS_S_COMPLETE)
757 GOTO(out, rc = -ENOMEM);
759 if (lgss_inquire_context(rsci.ctx.gsc_mechctx, &ctx_expiry)) {
760 CERROR("unable to get expire time, drop it\n");
761 GOTO(out, rc = -EINVAL);
763 rsci.h.expiry_time = (time_t) ctx_expiry;
765 if (strcmp(imp->imp_obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0)
766 rsci.ctx.gsc_usr_mds = 1;
767 else if (strcmp(imp->imp_obd->obd_type->typ_name, LUSTRE_OSC_NAME) == 0)
768 rsci.ctx.gsc_usr_oss = 1;
770 rsci.ctx.gsc_usr_root = 1;
772 rscp = rsc_update(&rsci, rscp);
774 GOTO(out, rc = -ENOMEM);
776 rscp->target = imp->imp_obd;
777 rawobj_dup(&gctx->gc_svc_handle, &rscp->handle);
779 CWARN("create reverse svc ctx %p to %s: idx "LPX64"\n",
780 &rscp->ctx, obd2cli_tgt(imp->imp_obd), gsec->gs_rvs_hdl);
784 cache_put(&rscp->h, &rsc_cache);
788 CERROR("create reverse svc ctx: idx "LPX64", rc %d\n",
789 gsec->gs_rvs_hdl, rc);
793 int gss_svc_upcall_expire_rvs_ctx(rawobj_t *handle)
795 const cfs_time_t expire = 20;
798 rscp = gss_svc_searchbyctx(handle);
800 CDEBUG(D_SEC, "reverse svcctx %p (rsc %p) expire soon\n",
803 rscp->h.expiry_time = cfs_time_current_sec() + expire;
804 COMPAT_RSC_PUT(&rscp->h, &rsc_cache);
809 int gss_svc_upcall_dup_handle(rawobj_t *handle, struct gss_svc_ctx *ctx)
811 struct rsc *rscp = container_of(ctx, struct rsc, ctx);
813 return rawobj_dup(handle, &rscp->handle);
816 int gss_svc_upcall_update_sequence(rawobj_t *handle, __u32 seq)
820 rscp = gss_svc_searchbyctx(handle);
822 CDEBUG(D_SEC, "reverse svcctx %p (rsc %p) update seq to %u\n",
823 &rscp->ctx, rscp, seq + 1);
825 rscp->ctx.gsc_rvs_seq = seq + 1;
826 COMPAT_RSC_PUT(&rscp->h, &rsc_cache);
831 static struct cache_deferred_req* cache_upcall_defer(struct cache_req *req)
835 static struct cache_req cache_upcall_chandle = { cache_upcall_defer };
837 int gss_svc_upcall_handle_init(struct ptlrpc_request *req,
838 struct gss_svc_reqctx *grctx,
839 struct gss_wire_ctx *gw,
840 struct obd_device *target,
845 struct ptlrpc_reply_state *rs;
846 struct rsc *rsci = NULL;
847 struct rsi *rsip = NULL, rsikey;
849 int replen = sizeof(struct ptlrpc_body);
850 struct gss_rep_header *rephdr;
852 int rc = SECSVC_DROP;
854 memset(&rsikey, 0, sizeof(rsikey));
855 rsikey.lustre_svc = lustre_svc;
856 rsikey.nid = (__u64) req->rq_peer.nid;
858 /* duplicate context handle. for INIT it always 0 */
859 if (rawobj_dup(&rsikey.in_handle, &gw->gw_handle)) {
860 CERROR("fail to dup context handle\n");
864 if (rawobj_dup(&rsikey.in_token, in_token)) {
865 CERROR("can't duplicate token\n");
866 rawobj_free(&rsikey.in_handle);
870 rsip = rsi_lookup(&rsikey);
873 CERROR("error in rsi_lookup.\n");
875 if (!gss_pack_err_notify(req, GSS_S_FAILURE, 0))
876 rc = SECSVC_COMPLETE;
881 cache_get(&rsip->h); /* take an extra ref */
882 init_waitqueue_head(&rsip->waitq);
883 init_waitqueue_entry_current(&wait);
884 add_wait_queue(&rsip->waitq, &wait);
887 /* Note each time cache_check() will drop a reference if return
888 * non-zero. We hold an extra reference on initial rsip, but must
889 * take care of following calls. */
890 rc = cache_check(&rsi_cache, &rsip->h, &cache_upcall_chandle);
898 read_lock(&rsi_cache.hash_lock);
899 valid = test_bit(CACHE_VALID, &rsip->h.flags);
901 set_current_state(TASK_INTERRUPTIBLE);
902 read_unlock(&rsi_cache.hash_lock);
905 schedule_timeout(GSS_SVC_UPCALL_TIMEOUT *
911 CWARN("waited %ds timeout, drop\n", GSS_SVC_UPCALL_TIMEOUT);
915 CWARN("cache_check return ENOENT, drop\n");
918 /* if not the first check, we have to release the extra
919 * reference we just added on it. */
921 cache_put(&rsip->h, &rsi_cache);
922 CDEBUG(D_SEC, "cache_check is good\n");
926 remove_wait_queue(&rsip->waitq, &wait);
927 cache_put(&rsip->h, &rsi_cache);
930 GOTO(out, rc = SECSVC_DROP);
933 rsci = gss_svc_searchbyctx(&rsip->out_handle);
935 CERROR("authentication failed\n");
937 if (!gss_pack_err_notify(req, GSS_S_FAILURE, 0))
938 rc = SECSVC_COMPLETE;
943 grctx->src_ctx = &rsci->ctx;
946 if (rawobj_dup(&rsci->ctx.gsc_rvs_hdl, rvs_hdl)) {
947 CERROR("failed duplicate reverse handle\n");
951 rsci->target = target;
953 CDEBUG(D_SEC, "server create rsc %p(%u->%s)\n",
954 rsci, rsci->ctx.gsc_uid, libcfs_nid2str(req->rq_peer.nid));
956 if (rsip->out_handle.len > PTLRPC_GSS_MAX_HANDLE_SIZE) {
957 CERROR("handle size %u too large\n", rsip->out_handle.len);
958 GOTO(out, rc = SECSVC_DROP);
962 grctx->src_reserve_len = cfs_size_round4(rsip->out_token.len);
964 rc = lustre_pack_reply_v2(req, 1, &replen, NULL, 0);
966 CERROR("failed to pack reply: %d\n", rc);
967 GOTO(out, rc = SECSVC_DROP);
970 rs = req->rq_reply_state;
971 LASSERT(rs->rs_repbuf->lm_bufcount == 3);
972 LASSERT(rs->rs_repbuf->lm_buflens[0] >=
973 sizeof(*rephdr) + rsip->out_handle.len);
974 LASSERT(rs->rs_repbuf->lm_buflens[2] >= rsip->out_token.len);
976 rephdr = lustre_msg_buf(rs->rs_repbuf, 0, 0);
977 rephdr->gh_version = PTLRPC_GSS_VERSION;
978 rephdr->gh_flags = 0;
979 rephdr->gh_proc = PTLRPC_GSS_PROC_ERR;
980 rephdr->gh_major = rsip->major_status;
981 rephdr->gh_minor = rsip->minor_status;
982 rephdr->gh_seqwin = GSS_SEQ_WIN;
983 rephdr->gh_handle.len = rsip->out_handle.len;
984 memcpy(rephdr->gh_handle.data, rsip->out_handle.data,
985 rsip->out_handle.len);
987 memcpy(lustre_msg_buf(rs->rs_repbuf, 2, 0), rsip->out_token.data,
988 rsip->out_token.len);
990 rs->rs_repdata_len = lustre_shrink_msg(rs->rs_repbuf, 2,
991 rsip->out_token.len, 0);
996 /* it looks like here we should put rsip also, but this mess up
997 * with NFS cache mgmt code... FIXME */
1000 rsi_put(&rsip->h, &rsi_cache);
1004 /* if anything went wrong, we don't keep the context too */
1005 if (rc != SECSVC_OK)
1006 set_bit(CACHE_NEGATIVE, &rsci->h.flags);
1008 CDEBUG(D_SEC, "create rsc with idx "LPX64"\n",
1009 gss_handle_to_u64(&rsci->handle));
1011 COMPAT_RSC_PUT(&rsci->h, &rsc_cache);
1016 struct gss_svc_ctx *gss_svc_upcall_get_ctx(struct ptlrpc_request *req,
1017 struct gss_wire_ctx *gw)
1021 rsc = gss_svc_searchbyctx(&gw->gw_handle);
1023 CWARN("Invalid gss ctx idx "LPX64" from %s\n",
1024 gss_handle_to_u64(&gw->gw_handle),
1025 libcfs_nid2str(req->rq_peer.nid));
1032 void gss_svc_upcall_put_ctx(struct gss_svc_ctx *ctx)
1034 struct rsc *rsc = container_of(ctx, struct rsc, ctx);
1036 COMPAT_RSC_PUT(&rsc->h, &rsc_cache);
1039 void gss_svc_upcall_destroy_ctx(struct gss_svc_ctx *ctx)
1041 struct rsc *rsc = container_of(ctx, struct rsc, ctx);
1043 /* can't be found */
1044 set_bit(CACHE_NEGATIVE, &rsc->h.flags);
1045 /* to be removed at next scan */
1046 rsc->h.expiry_time = 1;
1049 int __init gss_init_svc_upcall(void)
1053 spin_lock_init(&__ctx_index_lock);
1055 * this helps reducing context index confliction. after server reboot,
1056 * conflicting request from clients might be filtered out by initial
1057 * sequence number checking, thus no chance to sent error notification
1060 cfs_get_random_bytes(&__ctx_index, sizeof(__ctx_index));
1063 cache_register(&rsi_cache);
1064 cache_register(&rsc_cache);
1066 /* FIXME this looks stupid. we intend to give lsvcgssd a chance to open
1067 * the init upcall channel, otherwise there's big chance that the first
1068 * upcall issued before the channel be opened thus nfsv4 cache code will
1069 * drop the request direclty, thus lead to unnecessary recovery time.
1070 * here we wait at miximum 1.5 seconds. */
1071 for (i = 0; i < 6; i++) {
1072 if (atomic_read(&rsi_cache.readers) > 0)
1074 set_current_state(TASK_UNINTERRUPTIBLE);
1076 schedule_timeout(HZ / 4);
1079 if (atomic_read(&rsi_cache.readers) == 0)
1080 CWARN("Init channel is not opened by lsvcgssd, following "
1081 "request might be dropped until lsvcgssd is active\n");
1086 void __exit gss_exit_svc_upcall(void)
1088 cache_purge(&rsi_cache);
1089 cache_unregister(&rsi_cache);
1091 cache_purge(&rsc_cache);
1092 cache_unregister(&rsc_cache);