1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/ptlrpc/sec_null.c
38 * Author: Eric Mei <ericm@clusterfs.com>
42 # define EXPORT_SYMTAB
44 #define DEBUG_SUBSYSTEM S_SEC
47 #include <liblustre.h>
50 #include <obd_support.h>
51 #include <obd_cksum.h>
52 #include <obd_class.h>
53 #include <lustre_net.h>
54 #include <lustre_sec.h>
56 static struct ptlrpc_sec_policy null_policy;
57 static struct ptlrpc_sec null_sec;
58 static struct ptlrpc_cli_ctx null_cli_ctx;
59 static struct ptlrpc_svc_ctx null_svc_ctx;
62 * null sec temporarily use the third byte of lm_secflvr to identify
63 * the source sec part.
66 void null_encode_sec_part(struct lustre_msg *msg, enum lustre_sec_part sp)
68 msg->lm_secflvr |= (((__u32) sp) & 0xFF) << 16;
72 enum lustre_sec_part null_decode_sec_part(struct lustre_msg *msg)
74 switch (msg->lm_magic) {
75 case LUSTRE_MSG_MAGIC_V2:
76 return (msg->lm_secflvr >> 16) & 0xFF;
77 case LUSTRE_MSG_MAGIC_V2_SWABBED:
78 return (msg->lm_secflvr >> 8) & 0xFF;
84 static int null_ctx_refresh(struct ptlrpc_cli_ctx *ctx)
86 /* should never reach here */
92 int null_ctx_sign(struct ptlrpc_cli_ctx *ctx, struct ptlrpc_request *req)
94 req->rq_reqbuf->lm_secflvr = SPTLRPC_FLVR_NULL;
96 if (!req->rq_import->imp_dlm_fake) {
97 struct obd_device *obd = req->rq_import->imp_obd;
98 null_encode_sec_part(req->rq_reqbuf,
99 obd->u.cli.cl_sec_part);
101 req->rq_reqdata_len = req->rq_reqlen;
106 int null_ctx_verify(struct ptlrpc_cli_ctx *ctx, struct ptlrpc_request *req)
108 __u32 cksums, cksumc;
110 LASSERT(req->rq_repdata);
112 /* real reply rq_repdata point inside of rq_reqbuf; early reply
113 * rq_repdata point to a separate allocated space */
114 if ((char *) req->rq_repdata < req->rq_repbuf ||
115 (char *) req->rq_repdata >= req->rq_repbuf + req->rq_repbuf_len) {
116 cksums = req->rq_repdata->lm_cksum;
117 req->rq_repdata->lm_cksum = 0;
119 if (req->rq_repdata->lm_magic == LUSTRE_MSG_MAGIC_V2_SWABBED)
122 cksumc = crc32_le(!(__u32) 0, (unsigned char *)req->rq_repdata,
123 req->rq_repdata_len);
124 if (cksumc != cksums) {
125 CWARN("early reply checksum mismatch: %08x != %08x\n",
131 req->rq_repmsg = req->rq_repdata;
132 req->rq_replen = req->rq_repdata_len;
137 struct ptlrpc_sec *null_create_sec(struct obd_import *imp,
138 struct ptlrpc_svc_ctx *svc_ctx,
139 struct sptlrpc_flavor *sf)
141 LASSERT(RPC_FLVR_POLICY(sf->sf_rpc) == SPTLRPC_POLICY_NULL);
143 if (sf->sf_bulk_ciph != BULK_CIPH_ALG_NULL ||
144 sf->sf_bulk_hash != BULK_HASH_ALG_NULL) {
145 CERROR("null sec don't support bulk algorithm: %u/%u\n",
146 sf->sf_bulk_ciph, sf->sf_bulk_hash);
150 /* general layer has take a module reference for us, because we never
151 * really destroy the sec, simply release the reference here.
153 sptlrpc_policy_put(&null_policy);
158 void null_destroy_sec(struct ptlrpc_sec *sec)
160 LASSERT(sec == &null_sec);
164 struct ptlrpc_cli_ctx *null_lookup_ctx(struct ptlrpc_sec *sec,
165 struct vfs_cred *vcred,
166 int create, int remove_dead)
168 atomic_inc(&null_cli_ctx.cc_refcount);
169 return &null_cli_ctx;
173 int null_flush_ctx_cache(struct ptlrpc_sec *sec,
175 int grace, int force)
181 int null_alloc_reqbuf(struct ptlrpc_sec *sec,
182 struct ptlrpc_request *req,
185 if (!req->rq_reqbuf) {
186 int alloc_size = size_roundup_power2(msgsize);
188 LASSERT(!req->rq_pool);
189 OBD_ALLOC(req->rq_reqbuf, alloc_size);
193 req->rq_reqbuf_len = alloc_size;
195 LASSERT(req->rq_pool);
196 LASSERT(req->rq_reqbuf_len >= msgsize);
197 memset(req->rq_reqbuf, 0, msgsize);
200 req->rq_reqmsg = req->rq_reqbuf;
205 void null_free_reqbuf(struct ptlrpc_sec *sec,
206 struct ptlrpc_request *req)
209 LASSERTF(req->rq_reqmsg == req->rq_reqbuf,
210 "req %p: reqmsg %p is not reqbuf %p in null sec\n",
211 req, req->rq_reqmsg, req->rq_reqbuf);
212 LASSERTF(req->rq_reqbuf_len >= req->rq_reqlen,
213 "req %p: reqlen %d should smaller than buflen %d\n",
214 req, req->rq_reqlen, req->rq_reqbuf_len);
216 OBD_FREE(req->rq_reqbuf, req->rq_reqbuf_len);
217 req->rq_reqmsg = req->rq_reqbuf = NULL;
218 req->rq_reqbuf_len = 0;
221 req->rq_reqmsg = NULL;
225 int null_alloc_repbuf(struct ptlrpc_sec *sec,
226 struct ptlrpc_request *req,
229 /* add space for early replied */
230 msgsize += lustre_msg_early_size();
232 msgsize = size_roundup_power2(msgsize);
234 OBD_ALLOC(req->rq_repbuf, msgsize);
238 req->rq_repbuf_len = msgsize;
243 void null_free_repbuf(struct ptlrpc_sec *sec,
244 struct ptlrpc_request *req)
246 LASSERT(req->rq_repbuf);
248 OBD_FREE(req->rq_repbuf, req->rq_repbuf_len);
249 req->rq_repbuf = NULL;
250 req->rq_repbuf_len = 0;
252 req->rq_repmsg = NULL;
256 int null_enlarge_reqbuf(struct ptlrpc_sec *sec,
257 struct ptlrpc_request *req,
258 int segment, int newsize)
260 struct lustre_msg *newbuf;
261 struct lustre_msg *oldbuf = req->rq_reqmsg;
262 int oldsize, newmsg_size, alloc_size;
264 LASSERT(req->rq_reqbuf);
265 LASSERT(req->rq_reqbuf == req->rq_reqmsg);
266 LASSERT(req->rq_reqbuf_len >= req->rq_reqlen);
267 LASSERT(req->rq_reqlen == lustre_packed_msg_size(oldbuf));
269 /* compute new message size */
270 oldsize = req->rq_reqbuf->lm_buflens[segment];
271 req->rq_reqbuf->lm_buflens[segment] = newsize;
272 newmsg_size = lustre_packed_msg_size(oldbuf);
273 req->rq_reqbuf->lm_buflens[segment] = oldsize;
275 /* request from pool should always have enough buffer */
276 LASSERT(!req->rq_pool || req->rq_reqbuf_len >= newmsg_size);
278 if (req->rq_reqbuf_len < newmsg_size) {
279 alloc_size = size_roundup_power2(newmsg_size);
281 OBD_ALLOC(newbuf, alloc_size);
285 memcpy(newbuf, req->rq_reqbuf, req->rq_reqlen);
287 OBD_FREE(req->rq_reqbuf, req->rq_reqbuf_len);
288 req->rq_reqbuf = req->rq_reqmsg = newbuf;
289 req->rq_reqbuf_len = alloc_size;
292 _sptlrpc_enlarge_msg_inplace(req->rq_reqmsg, segment, newsize);
293 req->rq_reqlen = newmsg_size;
298 static struct ptlrpc_svc_ctx null_svc_ctx = {
299 .sc_refcount = ATOMIC_INIT(1),
300 .sc_policy = &null_policy,
304 int null_accept(struct ptlrpc_request *req)
306 LASSERT(RPC_FLVR_POLICY(req->rq_flvr.sf_rpc) == SPTLRPC_POLICY_NULL);
308 if (req->rq_flvr.sf_rpc != SPTLRPC_FLVR_NULL) {
309 CERROR("Invalid rpc flavor 0x%x\n", req->rq_flvr.sf_rpc);
313 req->rq_sp_from = null_decode_sec_part(req->rq_reqbuf);
315 req->rq_reqmsg = req->rq_reqbuf;
316 req->rq_reqlen = req->rq_reqdata_len;
318 req->rq_svc_ctx = &null_svc_ctx;
319 atomic_inc(&req->rq_svc_ctx->sc_refcount);
325 int null_alloc_rs(struct ptlrpc_request *req, int msgsize)
327 struct ptlrpc_reply_state *rs;
328 int rs_size = sizeof(*rs) + msgsize;
330 LASSERT(msgsize % 8 == 0);
332 rs = req->rq_reply_state;
336 LASSERT(rs->rs_size >= rs_size);
338 OBD_ALLOC(rs, rs_size);
342 rs->rs_size = rs_size;
345 rs->rs_svc_ctx = req->rq_svc_ctx;
346 atomic_inc(&req->rq_svc_ctx->sc_refcount);
348 rs->rs_repbuf = (struct lustre_msg *) (rs + 1);
349 rs->rs_repbuf_len = rs_size - sizeof(*rs);
350 rs->rs_msg = rs->rs_repbuf;
352 req->rq_reply_state = rs;
357 void null_free_rs(struct ptlrpc_reply_state *rs)
359 LASSERT(atomic_read(&rs->rs_svc_ctx->sc_refcount) > 1);
360 atomic_dec(&rs->rs_svc_ctx->sc_refcount);
362 if (!rs->rs_prealloc)
363 OBD_FREE(rs, rs->rs_size);
367 int null_authorize(struct ptlrpc_request *req)
369 struct ptlrpc_reply_state *rs = req->rq_reply_state;
373 rs->rs_repbuf->lm_secflvr = SPTLRPC_FLVR_NULL;
374 rs->rs_repdata_len = req->rq_replen;
376 if (likely(req->rq_packed_final)) {
377 req->rq_reply_off = lustre_msg_early_size();
379 rs->rs_repbuf->lm_cksum =
381 (unsigned char *)rs->rs_repbuf,
383 req->rq_reply_off = 0;
389 static struct ptlrpc_ctx_ops null_ctx_ops = {
390 .refresh = null_ctx_refresh,
391 .sign = null_ctx_sign,
392 .verify = null_ctx_verify,
395 static struct ptlrpc_sec_cops null_sec_cops = {
396 .create_sec = null_create_sec,
397 .destroy_sec = null_destroy_sec,
398 .lookup_ctx = null_lookup_ctx,
399 .flush_ctx_cache = null_flush_ctx_cache,
400 .alloc_reqbuf = null_alloc_reqbuf,
401 .alloc_repbuf = null_alloc_repbuf,
402 .free_reqbuf = null_free_reqbuf,
403 .free_repbuf = null_free_repbuf,
404 .enlarge_reqbuf = null_enlarge_reqbuf,
407 static struct ptlrpc_sec_sops null_sec_sops = {
408 .accept = null_accept,
409 .alloc_rs = null_alloc_rs,
410 .authorize = null_authorize,
411 .free_rs = null_free_rs,
414 static struct ptlrpc_sec_policy null_policy = {
415 .sp_owner = THIS_MODULE,
416 .sp_name = "sec.null",
417 .sp_policy = SPTLRPC_POLICY_NULL,
418 .sp_cops = &null_sec_cops,
419 .sp_sops = &null_sec_sops,
422 static void null_init_internal(void)
424 static HLIST_HEAD(__list);
426 null_sec.ps_policy = &null_policy;
427 atomic_set(&null_sec.ps_refcount, 1); /* always busy */
429 null_sec.ps_import = NULL;
430 null_sec.ps_flvr.sf_rpc = SPTLRPC_FLVR_NULL;
431 null_sec.ps_flvr.sf_bulk_ciph = BULK_CIPH_ALG_NULL;
432 null_sec.ps_flvr.sf_bulk_hash = BULK_HASH_ALG_NULL;
433 null_sec.ps_flvr.sf_flags = 0;
434 null_sec.ps_part = LUSTRE_SP_ANY;
435 null_sec.ps_dying = 0;
436 spin_lock_init(&null_sec.ps_lock);
437 atomic_set(&null_sec.ps_nctx, 1); /* for "null_cli_ctx" */
438 CFS_INIT_LIST_HEAD(&null_sec.ps_gc_list);
439 null_sec.ps_gc_interval = 0;
440 null_sec.ps_gc_next = 0;
442 hlist_add_head(&null_cli_ctx.cc_cache, &__list);
443 atomic_set(&null_cli_ctx.cc_refcount, 1); /* for hash */
444 null_cli_ctx.cc_sec = &null_sec;
445 null_cli_ctx.cc_ops = &null_ctx_ops;
446 null_cli_ctx.cc_expire = 0;
447 null_cli_ctx.cc_flags = PTLRPC_CTX_CACHED | PTLRPC_CTX_ETERNAL |
449 null_cli_ctx.cc_vcred.vc_uid = 0;
450 spin_lock_init(&null_cli_ctx.cc_lock);
451 CFS_INIT_LIST_HEAD(&null_cli_ctx.cc_req_list);
452 CFS_INIT_LIST_HEAD(&null_cli_ctx.cc_gc_chain);
455 int sptlrpc_null_init(void)
459 null_init_internal();
461 rc = sptlrpc_register_policy(&null_policy);
463 CERROR("failed to register %s: %d\n", null_policy.sp_name, rc);
468 void sptlrpc_null_fini(void)
472 rc = sptlrpc_unregister_policy(&null_policy);
474 CERROR("failed to unregister %s: %d\n", null_policy.sp_name,rc);