1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Modifications for Lustre
6 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
8 * Copyright (c) 2012, Whamcloud, Inc.
10 * Author: Eric Mei <ericm@clusterfs.com>
14 * Neil Brown <neilb@cse.unsw.edu.au>
15 * J. Bruce Fields <bfields@umich.edu>
16 * Andy Adamson <andros@umich.edu>
17 * Dug Song <dugsong@monkey.org>
19 * RPCSEC_GSS server authentication.
20 * This implements RPCSEC_GSS as defined in rfc2203 (rpcsec_gss) and rfc2078
23 * The RPCSEC_GSS involves three stages:
26 * 3/ context destruction
28 * Context creation is handled largely by upcalls to user-space.
29 * In particular, GSS_Accept_sec_context is handled by an upcall
30 * Data exchange is handled entirely within the kernel
31 * In particular, GSS_GetMIC, GSS_VerifyMIC, GSS_Seal, GSS_Unseal are in-kernel.
32 * Context destruction is handled in-kernel
33 * GSS_Delete_sec_context is in-kernel
35 * Context creation is initiated by a RPCSEC_GSS_INIT request arriving.
36 * The context handle and gss_token are used as a key into the rpcsec_init cache.
37 * The content of this cache includes some of the outputs of GSS_Accept_sec_context,
38 * being major_status, minor_status, context_handle, reply_token.
39 * These are sent back to the client.
40 * Sequence window management is handled by the kernel. The window size if currently
41 * a compile time constant.
43 * When user-space is happy that a context is established, it places an entry
44 * in the rpcsec_context cache. The key for this cache is the context_handle.
45 * The content includes:
46 * uid/gidlist - for determining access rights
48 * mechanism specific information, such as a key
52 #define DEBUG_SUBSYSTEM S_SEC
54 #include <linux/types.h>
55 #include <linux/init.h>
56 #include <linux/module.h>
57 #include <linux/slab.h>
58 #include <linux/hash.h>
59 #include <linux/mutex.h>
60 #include <linux/sunrpc/cache.h>
62 #include <liblustre.h>
66 #include <obd_class.h>
67 #include <obd_support.h>
68 #include <lustre/lustre_idl.h>
69 #include <lustre_net.h>
70 #include <lustre_import.h>
71 #include <lustre_sec.h>
74 #include "gss_internal.h"
77 #define GSS_SVC_UPCALL_TIMEOUT (20)
79 static cfs_spinlock_t __ctx_index_lock;
80 static __u64 __ctx_index;
82 __u64 gss_get_next_ctx_index(void)
86 cfs_spin_lock(&__ctx_index_lock);
88 cfs_spin_unlock(&__ctx_index_lock);
93 static inline unsigned long hash_mem(char *buf, int length, int bits)
95 unsigned long hash = 0;
110 if ((len & (BITS_PER_LONG/8-1)) == 0)
111 hash = cfs_hash_long(hash^l, BITS_PER_LONG);
114 return hash >> (BITS_PER_LONG - bits);
117 /****************************************
119 ****************************************/
121 #define RSI_HASHBITS (6)
122 #define RSI_HASHMAX (1 << RSI_HASHBITS)
123 #define RSI_HASHMASK (RSI_HASHMAX - 1)
130 rawobj_t in_handle, in_token;
131 rawobj_t out_handle, out_token;
132 int major_status, minor_status;
135 static struct cache_head *rsi_table[RSI_HASHMAX];
136 static struct cache_detail rsi_cache;
137 static struct rsi *rsi_update(struct rsi *new, struct rsi *old);
138 static struct rsi *rsi_lookup(struct rsi *item);
140 static inline int rsi_hash(struct rsi *item)
142 return hash_mem((char *)item->in_handle.data, item->in_handle.len,
144 hash_mem((char *)item->in_token.data, item->in_token.len,
148 static inline int __rsi_match(struct rsi *item, struct rsi *tmp)
150 return (rawobj_equal(&item->in_handle, &tmp->in_handle) &&
151 rawobj_equal(&item->in_token, &tmp->in_token));
154 static void rsi_free(struct rsi *rsi)
156 rawobj_free(&rsi->in_handle);
157 rawobj_free(&rsi->in_token);
158 rawobj_free(&rsi->out_handle);
159 rawobj_free(&rsi->out_token);
162 static void rsi_request(struct cache_detail *cd,
163 struct cache_head *h,
164 char **bpp, int *blen)
166 struct rsi *rsi = container_of(h, struct rsi, h);
169 /* if in_handle is null, provide kernel suggestion */
170 if (rsi->in_handle.len == 0)
171 index = gss_get_next_ctx_index();
173 qword_addhex(bpp, blen, (char *) &rsi->lustre_svc,
174 sizeof(rsi->lustre_svc));
175 qword_addhex(bpp, blen, (char *) &rsi->nid, sizeof(rsi->nid));
176 qword_addhex(bpp, blen, (char *) &index, sizeof(index));
177 qword_addhex(bpp, blen, rsi->in_handle.data, rsi->in_handle.len);
178 qword_addhex(bpp, blen, rsi->in_token.data, rsi->in_token.len);
182 #ifdef HAVE_CACHE_UPCALL
183 static int rsi_upcall(struct cache_detail *cd, struct cache_head *h)
185 return sunrpc_cache_pipe_upcall(cd, h, rsi_request);
189 static inline void __rsi_init(struct rsi *new, struct rsi *item)
191 new->out_handle = RAWOBJ_EMPTY;
192 new->out_token = RAWOBJ_EMPTY;
194 new->in_handle = item->in_handle;
195 item->in_handle = RAWOBJ_EMPTY;
196 new->in_token = item->in_token;
197 item->in_token = RAWOBJ_EMPTY;
199 new->lustre_svc = item->lustre_svc;
200 new->nid = item->nid;
201 cfs_waitq_init(&new->waitq);
204 static inline void __rsi_update(struct rsi *new, struct rsi *item)
206 LASSERT(new->out_handle.len == 0);
207 LASSERT(new->out_token.len == 0);
209 new->out_handle = item->out_handle;
210 item->out_handle = RAWOBJ_EMPTY;
211 new->out_token = item->out_token;
212 item->out_token = RAWOBJ_EMPTY;
214 new->major_status = item->major_status;
215 new->minor_status = item->minor_status;
218 static void rsi_put(struct kref *ref)
220 struct rsi *rsi = container_of(ref, struct rsi, h.ref);
222 LASSERT(rsi->h.next == NULL);
227 static int rsi_match(struct cache_head *a, struct cache_head *b)
229 struct rsi *item = container_of(a, struct rsi, h);
230 struct rsi *tmp = container_of(b, struct rsi, h);
232 return __rsi_match(item, tmp);
235 static void rsi_init(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_init(new, item);
243 static void update_rsi(struct cache_head *cnew, struct cache_head *citem)
245 struct rsi *new = container_of(cnew, struct rsi, h);
246 struct rsi *item = container_of(citem, struct rsi, h);
248 __rsi_update(new, item);
251 static struct cache_head *rsi_alloc(void)
262 static int rsi_parse(struct cache_detail *cd, char *mesg, int mlen)
267 struct rsi rsii, *rsip = NULL;
269 int status = -EINVAL;
273 memset(&rsii, 0, sizeof(rsii));
276 len = qword_get(&mesg, buf, mlen);
279 if (rawobj_alloc(&rsii.in_handle, buf, len)) {
285 len = qword_get(&mesg, buf, mlen);
288 if (rawobj_alloc(&rsii.in_token, buf, len)) {
293 rsip = rsi_lookup(&rsii);
299 expiry = get_expiry(&mesg);
303 len = qword_get(&mesg, buf, mlen);
308 rsii.major_status = simple_strtol(buf, &ep, 10);
313 len = qword_get(&mesg, buf, mlen);
316 rsii.minor_status = simple_strtol(buf, &ep, 10);
321 len = qword_get(&mesg, buf, mlen);
324 if (rawobj_alloc(&rsii.out_handle, buf, len)) {
330 len = qword_get(&mesg, buf, mlen);
333 if (rawobj_alloc(&rsii.out_token, buf, len)) {
338 rsii.h.expiry_time = expiry;
339 rsip = rsi_update(&rsii, rsip);
344 cfs_waitq_broadcast(&rsip->waitq);
345 cache_put(&rsip->h, &rsi_cache);
351 CERROR("rsi parse error %d\n", status);
355 static struct cache_detail rsi_cache = {
356 .hash_size = RSI_HASHMAX,
357 .hash_table = rsi_table,
358 .name = "auth.sptlrpc.init",
359 .cache_put = rsi_put,
360 #ifdef HAVE_CACHE_UPCALL
361 .cache_upcall = rsi_upcall,
363 .cache_request = rsi_request,
365 .cache_parse = rsi_parse,
368 .update = update_rsi,
372 static struct rsi *rsi_lookup(struct rsi *item)
374 struct cache_head *ch;
375 int hash = rsi_hash(item);
377 ch = sunrpc_cache_lookup(&rsi_cache, &item->h, hash);
379 return container_of(ch, struct rsi, h);
384 static struct rsi *rsi_update(struct rsi *new, struct rsi *old)
386 struct cache_head *ch;
387 int hash = rsi_hash(new);
389 ch = sunrpc_cache_update(&rsi_cache, &new->h, &old->h, hash);
391 return container_of(ch, struct rsi, h);
396 /****************************************
398 ****************************************/
400 #define RSC_HASHBITS (10)
401 #define RSC_HASHMAX (1 << RSC_HASHBITS)
402 #define RSC_HASHMASK (RSC_HASHMAX - 1)
406 struct obd_device *target;
408 struct gss_svc_ctx ctx;
411 static struct cache_head *rsc_table[RSC_HASHMAX];
412 static struct cache_detail rsc_cache;
413 static struct rsc *rsc_update(struct rsc *new, struct rsc *old);
414 static struct rsc *rsc_lookup(struct rsc *item);
416 static void rsc_free(struct rsc *rsci)
418 rawobj_free(&rsci->handle);
419 rawobj_free(&rsci->ctx.gsc_rvs_hdl);
420 lgss_delete_sec_context(&rsci->ctx.gsc_mechctx);
423 static inline int rsc_hash(struct rsc *rsci)
425 return hash_mem((char *)rsci->handle.data,
426 rsci->handle.len, RSC_HASHBITS);
429 static inline int __rsc_match(struct rsc *new, struct rsc *tmp)
431 return rawobj_equal(&new->handle, &tmp->handle);
434 static inline void __rsc_init(struct rsc *new, struct rsc *tmp)
436 new->handle = tmp->handle;
437 tmp->handle = RAWOBJ_EMPTY;
440 memset(&new->ctx, 0, sizeof(new->ctx));
441 new->ctx.gsc_rvs_hdl = RAWOBJ_EMPTY;
444 static inline void __rsc_update(struct rsc *new, struct rsc *tmp)
447 tmp->ctx.gsc_rvs_hdl = RAWOBJ_EMPTY;
448 tmp->ctx.gsc_mechctx = NULL;
450 memset(&new->ctx.gsc_seqdata, 0, sizeof(new->ctx.gsc_seqdata));
451 cfs_spin_lock_init(&new->ctx.gsc_seqdata.ssd_lock);
454 static void rsc_put(struct kref *ref)
456 struct rsc *rsci = container_of(ref, struct rsc, h.ref);
458 LASSERT(rsci->h.next == NULL);
463 static int rsc_match(struct cache_head *a, struct cache_head *b)
465 struct rsc *new = container_of(a, struct rsc, h);
466 struct rsc *tmp = container_of(b, struct rsc, h);
468 return __rsc_match(new, tmp);
471 static void rsc_init(struct cache_head *cnew, struct cache_head *ctmp)
473 struct rsc *new = container_of(cnew, struct rsc, h);
474 struct rsc *tmp = container_of(ctmp, struct rsc, h);
476 __rsc_init(new, tmp);
479 static void update_rsc(struct cache_head *cnew, struct cache_head *ctmp)
481 struct rsc *new = container_of(cnew, struct rsc, h);
482 struct rsc *tmp = container_of(ctmp, struct rsc, h);
484 __rsc_update(new, tmp);
487 static struct cache_head * rsc_alloc(void)
498 static int rsc_parse(struct cache_detail *cd, char *mesg, int mlen)
501 int len, rv, tmp_int;
502 struct rsc rsci, *rscp = NULL;
504 int status = -EINVAL;
505 struct gss_api_mech *gm = NULL;
507 memset(&rsci, 0, sizeof(rsci));
510 len = qword_get(&mesg, buf, mlen);
511 if (len < 0) goto out;
513 if (rawobj_alloc(&rsci.handle, buf, len))
518 expiry = get_expiry(&mesg);
524 rv = get_int(&mesg, &tmp_int);
526 CERROR("fail to get remote flag\n");
529 rsci.ctx.gsc_remote = (tmp_int != 0);
532 rv = get_int(&mesg, &tmp_int);
534 CERROR("fail to get oss user flag\n");
537 rsci.ctx.gsc_usr_root = (tmp_int != 0);
540 rv = get_int(&mesg, &tmp_int);
542 CERROR("fail to get mds user flag\n");
545 rsci.ctx.gsc_usr_mds = (tmp_int != 0);
548 rv = get_int(&mesg, &tmp_int);
550 CERROR("fail to get oss user flag\n");
553 rsci.ctx.gsc_usr_oss = (tmp_int != 0);
556 rv = get_int(&mesg, (int *) &rsci.ctx.gsc_mapped_uid);
558 CERROR("fail to get mapped uid\n");
562 rscp = rsc_lookup(&rsci);
566 /* uid, or NEGATIVE */
567 rv = get_int(&mesg, (int *) &rsci.ctx.gsc_uid);
571 CERROR("NOENT? set rsc entry negative\n");
572 cfs_set_bit(CACHE_NEGATIVE, &rsci.h.flags);
575 unsigned long ctx_expiry;
578 if (get_int(&mesg, (int *) &rsci.ctx.gsc_gid))
582 len = qword_get(&mesg, buf, mlen);
585 gm = lgss_name_to_mech(buf);
586 status = -EOPNOTSUPP;
591 /* mech-specific data: */
592 len = qword_get(&mesg, buf, mlen);
597 tmp_buf.data = (unsigned char *)buf;
598 if (lgss_import_sec_context(&tmp_buf, gm,
599 &rsci.ctx.gsc_mechctx))
602 /* currently the expiry time passed down from user-space
603 * is invalid, here we retrive it from mech. */
604 if (lgss_inquire_context(rsci.ctx.gsc_mechctx, &ctx_expiry)) {
605 CERROR("unable to get expire time, drop it\n");
608 expiry = (time_t) ctx_expiry;
611 rsci.h.expiry_time = expiry;
612 rscp = rsc_update(&rsci, rscp);
619 cache_put(&rscp->h, &rsc_cache);
624 CERROR("parse rsc error %d\n", status);
628 static struct cache_detail rsc_cache = {
629 .hash_size = RSC_HASHMAX,
630 .hash_table = rsc_table,
631 .name = "auth.sptlrpc.context",
632 .cache_put = rsc_put,
633 .cache_parse = rsc_parse,
636 .update = update_rsc,
640 static struct rsc *rsc_lookup(struct rsc *item)
642 struct cache_head *ch;
643 int hash = rsc_hash(item);
645 ch = sunrpc_cache_lookup(&rsc_cache, &item->h, hash);
647 return container_of(ch, struct rsc, h);
652 static struct rsc *rsc_update(struct rsc *new, struct rsc *old)
654 struct cache_head *ch;
655 int hash = rsc_hash(new);
657 ch = sunrpc_cache_update(&rsc_cache, &new->h, &old->h, hash);
659 return container_of(ch, struct rsc, h);
664 #define COMPAT_RSC_PUT(item, cd) cache_put((item), (cd))
666 /****************************************
668 ****************************************/
670 typedef int rsc_entry_match(struct rsc *rscp, long data);
672 static void rsc_flush(rsc_entry_match *match, long data)
674 struct cache_head **ch;
679 cfs_write_lock(&rsc_cache.hash_lock);
680 for (n = 0; n < RSC_HASHMAX; n++) {
681 for (ch = &rsc_cache.hash_table[n]; *ch;) {
682 rscp = container_of(*ch, struct rsc, h);
684 if (!match(rscp, data)) {
689 /* it seems simply set NEGATIVE doesn't work */
693 cfs_set_bit(CACHE_NEGATIVE, &rscp->h.flags);
694 COMPAT_RSC_PUT(&rscp->h, &rsc_cache);
698 cfs_write_unlock(&rsc_cache.hash_lock);
702 static int match_uid(struct rsc *rscp, long uid)
706 return ((int) rscp->ctx.gsc_uid == (int) uid);
709 static int match_target(struct rsc *rscp, long target)
711 return (rscp->target == (struct obd_device *) target);
714 static inline void rsc_flush_uid(int uid)
717 CWARN("flush all gss contexts...\n");
719 rsc_flush(match_uid, (long) uid);
722 static inline void rsc_flush_target(struct obd_device *target)
724 rsc_flush(match_target, (long) target);
727 void gss_secsvc_flush(struct obd_device *target)
729 rsc_flush_target(target);
731 EXPORT_SYMBOL(gss_secsvc_flush);
733 static struct rsc *gss_svc_searchbyctx(rawobj_t *handle)
738 memset(&rsci, 0, sizeof(rsci));
739 if (rawobj_dup(&rsci.handle, handle))
742 found = rsc_lookup(&rsci);
746 if (cache_check(&rsc_cache, &found->h, NULL))
751 int gss_svc_upcall_install_rvs_ctx(struct obd_import *imp,
752 struct gss_sec *gsec,
753 struct gss_cli_ctx *gctx)
755 struct rsc rsci, *rscp = NULL;
756 unsigned long ctx_expiry;
761 memset(&rsci, 0, sizeof(rsci));
763 if (rawobj_alloc(&rsci.handle, (char *) &gsec->gs_rvs_hdl,
764 sizeof(gsec->gs_rvs_hdl)))
765 GOTO(out, rc = -ENOMEM);
767 rscp = rsc_lookup(&rsci);
769 GOTO(out, rc = -ENOMEM);
771 major = lgss_copy_reverse_context(gctx->gc_mechctx,
772 &rsci.ctx.gsc_mechctx);
773 if (major != GSS_S_COMPLETE)
774 GOTO(out, rc = -ENOMEM);
776 if (lgss_inquire_context(rsci.ctx.gsc_mechctx, &ctx_expiry)) {
777 CERROR("unable to get expire time, drop it\n");
778 GOTO(out, rc = -EINVAL);
780 rsci.h.expiry_time = (time_t) ctx_expiry;
782 if (strcmp(imp->imp_obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0)
783 rsci.ctx.gsc_usr_mds = 1;
784 else if (strcmp(imp->imp_obd->obd_type->typ_name, LUSTRE_OSC_NAME) == 0)
785 rsci.ctx.gsc_usr_oss = 1;
787 rsci.ctx.gsc_usr_root = 1;
789 rscp = rsc_update(&rsci, rscp);
791 GOTO(out, rc = -ENOMEM);
793 rscp->target = imp->imp_obd;
794 rawobj_dup(&gctx->gc_svc_handle, &rscp->handle);
796 CWARN("create reverse svc ctx %p to %s: idx "LPX64"\n",
797 &rscp->ctx, obd2cli_tgt(imp->imp_obd), gsec->gs_rvs_hdl);
801 cache_put(&rscp->h, &rsc_cache);
805 CERROR("create reverse svc ctx: idx "LPX64", rc %d\n",
806 gsec->gs_rvs_hdl, rc);
810 int gss_svc_upcall_expire_rvs_ctx(rawobj_t *handle)
812 const cfs_time_t expire = 20;
815 rscp = gss_svc_searchbyctx(handle);
817 CDEBUG(D_SEC, "reverse svcctx %p (rsc %p) expire soon\n",
820 rscp->h.expiry_time = cfs_time_current_sec() + expire;
821 COMPAT_RSC_PUT(&rscp->h, &rsc_cache);
826 int gss_svc_upcall_dup_handle(rawobj_t *handle, struct gss_svc_ctx *ctx)
828 struct rsc *rscp = container_of(ctx, struct rsc, ctx);
830 return rawobj_dup(handle, &rscp->handle);
833 int gss_svc_upcall_update_sequence(rawobj_t *handle, __u32 seq)
837 rscp = gss_svc_searchbyctx(handle);
839 CDEBUG(D_SEC, "reverse svcctx %p (rsc %p) update seq to %u\n",
840 &rscp->ctx, rscp, seq + 1);
842 rscp->ctx.gsc_rvs_seq = seq + 1;
843 COMPAT_RSC_PUT(&rscp->h, &rsc_cache);
848 static struct cache_deferred_req* cache_upcall_defer(struct cache_req *req)
852 static struct cache_req cache_upcall_chandle = { cache_upcall_defer };
854 int gss_svc_upcall_handle_init(struct ptlrpc_request *req,
855 struct gss_svc_reqctx *grctx,
856 struct gss_wire_ctx *gw,
857 struct obd_device *target,
862 struct ptlrpc_reply_state *rs;
863 struct rsc *rsci = NULL;
864 struct rsi *rsip = NULL, rsikey;
866 int replen = sizeof(struct ptlrpc_body);
867 struct gss_rep_header *rephdr;
869 int rc = SECSVC_DROP;
872 memset(&rsikey, 0, sizeof(rsikey));
873 rsikey.lustre_svc = lustre_svc;
874 rsikey.nid = (__u64) req->rq_peer.nid;
876 /* duplicate context handle. for INIT it always 0 */
877 if (rawobj_dup(&rsikey.in_handle, &gw->gw_handle)) {
878 CERROR("fail to dup context handle\n");
882 if (rawobj_dup(&rsikey.in_token, in_token)) {
883 CERROR("can't duplicate token\n");
884 rawobj_free(&rsikey.in_handle);
888 rsip = rsi_lookup(&rsikey);
891 CERROR("error in rsi_lookup.\n");
893 if (!gss_pack_err_notify(req, GSS_S_FAILURE, 0))
894 rc = SECSVC_COMPLETE;
899 cache_get(&rsip->h); /* take an extra ref */
900 cfs_waitq_init(&rsip->waitq);
901 cfs_waitlink_init(&wait);
902 cfs_waitq_add(&rsip->waitq, &wait);
905 /* Note each time cache_check() will drop a reference if return
906 * non-zero. We hold an extra reference on initial rsip, but must
907 * take care of following calls. */
908 rc = cache_check(&rsi_cache, &rsip->h, &cache_upcall_chandle);
916 read_lock(&rsi_cache.hash_lock);
917 valid = cfs_test_bit(CACHE_VALID, &rsip->h.flags);
919 cfs_set_current_state(CFS_TASK_INTERRUPTIBLE);
920 read_unlock(&rsi_cache.hash_lock);
923 cfs_schedule_timeout(GSS_SVC_UPCALL_TIMEOUT *
929 CWARN("waited %ds timeout, drop\n", GSS_SVC_UPCALL_TIMEOUT);
933 CWARN("cache_check return ENOENT, drop\n");
936 /* if not the first check, we have to release the extra
937 * reference we just added on it. */
939 cache_put(&rsip->h, &rsi_cache);
940 CDEBUG(D_SEC, "cache_check is good\n");
944 cfs_waitq_del(&rsip->waitq, &wait);
945 cache_put(&rsip->h, &rsi_cache);
948 GOTO(out, rc = SECSVC_DROP);
951 rsci = gss_svc_searchbyctx(&rsip->out_handle);
953 CERROR("authentication failed\n");
955 if (!gss_pack_err_notify(req, GSS_S_FAILURE, 0))
956 rc = SECSVC_COMPLETE;
961 grctx->src_ctx = &rsci->ctx;
964 if (rawobj_dup(&rsci->ctx.gsc_rvs_hdl, rvs_hdl)) {
965 CERROR("failed duplicate reverse handle\n");
969 rsci->target = target;
971 CDEBUG(D_SEC, "server create rsc %p(%u->%s)\n",
972 rsci, rsci->ctx.gsc_uid, libcfs_nid2str(req->rq_peer.nid));
974 if (rsip->out_handle.len > PTLRPC_GSS_MAX_HANDLE_SIZE) {
975 CERROR("handle size %u too large\n", rsip->out_handle.len);
976 GOTO(out, rc = SECSVC_DROP);
980 grctx->src_reserve_len = cfs_size_round4(rsip->out_token.len);
982 rc = lustre_pack_reply_v2(req, 1, &replen, NULL, 0);
984 CERROR("failed to pack reply: %d\n", rc);
985 GOTO(out, rc = SECSVC_DROP);
988 rs = req->rq_reply_state;
989 LASSERT(rs->rs_repbuf->lm_bufcount == 3);
990 LASSERT(rs->rs_repbuf->lm_buflens[0] >=
991 sizeof(*rephdr) + rsip->out_handle.len);
992 LASSERT(rs->rs_repbuf->lm_buflens[2] >= rsip->out_token.len);
994 rephdr = lustre_msg_buf(rs->rs_repbuf, 0, 0);
995 rephdr->gh_version = PTLRPC_GSS_VERSION;
996 rephdr->gh_flags = 0;
997 rephdr->gh_proc = PTLRPC_GSS_PROC_ERR;
998 rephdr->gh_major = rsip->major_status;
999 rephdr->gh_minor = rsip->minor_status;
1000 rephdr->gh_seqwin = GSS_SEQ_WIN;
1001 rephdr->gh_handle.len = rsip->out_handle.len;
1002 memcpy(rephdr->gh_handle.data, rsip->out_handle.data,
1003 rsip->out_handle.len);
1005 memcpy(lustre_msg_buf(rs->rs_repbuf, 2, 0), rsip->out_token.data,
1006 rsip->out_token.len);
1008 rs->rs_repdata_len = lustre_shrink_msg(rs->rs_repbuf, 2,
1009 rsip->out_token.len, 0);
1014 /* it looks like here we should put rsip also, but this mess up
1015 * with NFS cache mgmt code... FIXME */
1018 rsi_put(&rsip->h, &rsi_cache);
1022 /* if anything went wrong, we don't keep the context too */
1023 if (rc != SECSVC_OK)
1024 cfs_set_bit(CACHE_NEGATIVE, &rsci->h.flags);
1026 CDEBUG(D_SEC, "create rsc with idx "LPX64"\n",
1027 gss_handle_to_u64(&rsci->handle));
1029 COMPAT_RSC_PUT(&rsci->h, &rsc_cache);
1034 struct gss_svc_ctx *gss_svc_upcall_get_ctx(struct ptlrpc_request *req,
1035 struct gss_wire_ctx *gw)
1039 rsc = gss_svc_searchbyctx(&gw->gw_handle);
1041 CWARN("Invalid gss ctx idx "LPX64" from %s\n",
1042 gss_handle_to_u64(&gw->gw_handle),
1043 libcfs_nid2str(req->rq_peer.nid));
1050 void gss_svc_upcall_put_ctx(struct gss_svc_ctx *ctx)
1052 struct rsc *rsc = container_of(ctx, struct rsc, ctx);
1054 COMPAT_RSC_PUT(&rsc->h, &rsc_cache);
1057 void gss_svc_upcall_destroy_ctx(struct gss_svc_ctx *ctx)
1059 struct rsc *rsc = container_of(ctx, struct rsc, ctx);
1061 /* can't be found */
1062 cfs_set_bit(CACHE_NEGATIVE, &rsc->h.flags);
1063 /* to be removed at next scan */
1064 rsc->h.expiry_time = 1;
1067 int __init gss_init_svc_upcall(void)
1071 cfs_spin_lock_init(&__ctx_index_lock);
1073 * this helps reducing context index confliction. after server reboot,
1074 * conflicting request from clients might be filtered out by initial
1075 * sequence number checking, thus no chance to sent error notification
1078 cfs_get_random_bytes(&__ctx_index, sizeof(__ctx_index));
1081 cache_register(&rsi_cache);
1082 cache_register(&rsc_cache);
1084 /* FIXME this looks stupid. we intend to give lsvcgssd a chance to open
1085 * the init upcall channel, otherwise there's big chance that the first
1086 * upcall issued before the channel be opened thus nfsv4 cache code will
1087 * drop the request direclty, thus lead to unnecessary recovery time.
1088 * here we wait at miximum 1.5 seconds. */
1089 for (i = 0; i < 6; i++) {
1090 if (atomic_read(&rsi_cache.readers) > 0)
1092 cfs_set_current_state(TASK_UNINTERRUPTIBLE);
1093 LASSERT(CFS_HZ >= 4);
1094 cfs_schedule_timeout(CFS_HZ / 4);
1097 if (atomic_read(&rsi_cache.readers) == 0)
1098 CWARN("Init channel is not opened by lsvcgssd, following "
1099 "request might be dropped until lsvcgssd is active\n");
1104 void __exit gss_exit_svc_upcall(void)
1106 cache_purge(&rsi_cache);
1107 cache_unregister(&rsi_cache);
1109 cache_purge(&rsc_cache);
1110 cache_unregister(&rsc_cache);