lustre/ptlrpc/sec_config.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36
  37 #define DEBUG_SUBSYSTEM S_SEC
  38
  39 #include <libcfs/libcfs.h>
  40 #ifndef __KERNEL__
  41 #include <liblustre.h>
  42 #include <libcfs/list.h>
  43 #else
  44 #include <linux/crypto.h>
  45 #include <linux/key.h>
  46 #endif
  47
  48 #include <obd.h>
  49 #include <obd_class.h>
  50 #include <obd_support.h>
  51 #include <lustre_net.h>
  52 #include <lustre_import.h>
  53 #include <lustre_log.h>
  54 #include <lustre_disk.h>
  55 #include <lustre_dlm.h>
  56 #include <lustre_param.h>
  57 #include <lustre_sec.h>
  58
  59 #include "ptlrpc_internal.h"
  60
  61 const char *sptlrpc_part2name(enum lustre_sec_part part)
  62 {
  63         switch (part) {
  64         case LUSTRE_SP_CLI:
  65                 return "cli";
  66         case LUSTRE_SP_MDT:
  67                 return "mdt";
  68         case LUSTRE_SP_OST:
  69                 return "ost";
  70         case LUSTRE_SP_MGC:
  71                 return "mgc";
  72         case LUSTRE_SP_MGS:
  73                 return "mgs";
  74         case LUSTRE_SP_ANY:
  75                 return "any";
  76         default:
  77                 return "err";
  78         }
  79 }
  80 EXPORT_SYMBOL(sptlrpc_part2name);
  81
  82 enum lustre_sec_part sptlrpc_target_sec_part(struct obd_device *obd)
  83 {
  84         const char *type = obd->obd_type->typ_name;
  85
  86         if (!strcmp(type, LUSTRE_MDT_NAME))
  87                 return LUSTRE_SP_MDT;
  88         if (!strcmp(type, LUSTRE_OST_NAME))
  89                 return LUSTRE_SP_OST;
  90         if (!strcmp(type, LUSTRE_MGS_NAME))
  91                 return LUSTRE_SP_MGS;
  92
  93         CERROR("unknown target %p(%s)\n", obd, type);
  94         return LUSTRE_SP_ANY;
  95 }
  96 EXPORT_SYMBOL(sptlrpc_target_sec_part);
  97
  98 /****************************************
  99  * user supplied flavor string parsing  *
 100  ****************************************/
 101
 102 /*
 103  * format: <base_flavor>[-<bulk_type:alg_spec>]
 104  */
 105 int sptlrpc_parse_flavor(const char *str, struct sptlrpc_flavor *flvr)
 106 {
 107         char            buf[32];
 108         char           *bulk, *alg;
 109
 110         memset(flvr, 0, sizeof(*flvr));
 111
 112         if (str == NULL || str[0] == '\0') {
 113                 flvr->sf_rpc = SPTLRPC_FLVR_INVALID;
 114                 return 0;
 115         }
 116
 117         strncpy(buf, str, sizeof(buf));
 118         buf[sizeof(buf) - 1] = '\0';
 119
 120         bulk = strchr(buf, '-');
 121         if (bulk)
 122                 *bulk++ = '\0';
 123
 124         flvr->sf_rpc = sptlrpc_name2flavor_base(buf);
 125         if (flvr->sf_rpc == SPTLRPC_FLVR_INVALID)
 126                 goto err_out;
 127
 128         /*
 129          * currently only base flavor "plain" can have bulk specification.
 130          */
 131         if (flvr->sf_rpc == SPTLRPC_FLVR_PLAIN) {
 132                 flvr->u_bulk.hash.hash_alg = BULK_HASH_ALG_ADLER32;
 133                 if (bulk) {
 134                         /*
 135                          * format: plain-hash:<hash_alg>
 136                          */
 137                         alg = strchr(bulk, ':');
 138                         if (alg == NULL)
 139                                 goto err_out;
 140                         *alg++ = '\0';
 141
 142                         if (strcmp(bulk, "hash"))
 143                                 goto err_out;
 144
 145                         flvr->u_bulk.hash.hash_alg = sptlrpc_get_hash_alg(alg);
 146                         if (flvr->u_bulk.hash.hash_alg >= BULK_HASH_ALG_MAX)
 147                                 goto err_out;
 148                 }
 149
 150                 if (flvr->u_bulk.hash.hash_alg == BULK_HASH_ALG_NULL)
 151                         flvr_set_bulk_svc(&flvr->sf_rpc, SPTLRPC_BULK_SVC_NULL);
 152                 else
 153                         flvr_set_bulk_svc(&flvr->sf_rpc, SPTLRPC_BULK_SVC_INTG);
 154         } else {
 155                 if (bulk)
 156                         goto err_out;
 157         }
 158
 159         flvr->sf_flags = 0;
 160         return 0;
 161
 162 err_out:
 163         CERROR("invalid flavor string: %s\n", str);
 164         return -EINVAL;
 165 }
 166 EXPORT_SYMBOL(sptlrpc_parse_flavor);
 167
 168 /****************************************
 169  * configure rules                      *
 170  ****************************************/
 171
 172 static void get_default_flavor(struct sptlrpc_flavor *sf)
 173 {
 174         memset(sf, 0, sizeof(*sf));
 175
 176         sf->sf_rpc = SPTLRPC_FLVR_NULL;
 177         sf->sf_flags = 0;
 178 }
 179
 180 static void sptlrpc_rule_init(struct sptlrpc_rule *rule)
 181 {
 182         rule->sr_netid = LNET_NIDNET(LNET_NID_ANY);
 183         rule->sr_from = LUSTRE_SP_ANY;
 184         rule->sr_to = LUSTRE_SP_ANY;
 185         rule->sr_padding = 0;
 186
 187         get_default_flavor(&rule->sr_flvr);
 188 }
 189
 190 /*
 191  * format: network[.direction]=flavor
 192  */
 193 int sptlrpc_parse_rule(char *param, struct sptlrpc_rule *rule)
 194 {
 195         char           *flavor, *dir;
 196         int             rc;
 197
 198         sptlrpc_rule_init(rule);
 199
 200         flavor = strchr(param, '=');
 201         if (flavor == NULL) {
 202                 CERROR("invalid param, no '='\n");
 203                 RETURN(-EINVAL);
 204         }
 205         *flavor++ = '\0';
 206
 207         dir = strchr(param, '.');
 208         if (dir)
 209                 *dir++ = '\0';
 210
 211         /* 1.1 network */
 212         if (strcmp(param, "default")) {
 213                 rule->sr_netid = libcfs_str2net(param);
 214                 if (rule->sr_netid == LNET_NIDNET(LNET_NID_ANY)) {
 215                         CERROR("invalid network name: %s\n", param);
 216                         RETURN(-EINVAL);
 217                 }
 218         }
 219
 220         /* 1.2 direction */
 221         if (dir) {
 222                 if (!strcmp(dir, "mdt2ost")) {
 223                         rule->sr_from = LUSTRE_SP_MDT;
 224                         rule->sr_to = LUSTRE_SP_OST;
 225                 } else if (!strcmp(dir, "mdt2mdt")) {
 226                         rule->sr_from = LUSTRE_SP_MDT;
 227                         rule->sr_to = LUSTRE_SP_MDT;
 228                 } else if (!strcmp(dir, "cli2ost")) {
 229                         rule->sr_from = LUSTRE_SP_CLI;
 230                         rule->sr_to = LUSTRE_SP_OST;
 231                 } else if (!strcmp(dir, "cli2mdt")) {
 232                         rule->sr_from = LUSTRE_SP_CLI;
 233                         rule->sr_to = LUSTRE_SP_MDT;
 234                 } else {
 235                         CERROR("invalid rule dir segment: %s\n", dir);
 236                         RETURN(-EINVAL);
 237                 }
 238         }
 239
 240         /* 2.1 flavor */
 241         rc = sptlrpc_parse_flavor(flavor, &rule->sr_flvr);
 242         if (rc)
 243                 RETURN(-EINVAL);
 244
 245         RETURN(0);
 246 }
 247 EXPORT_SYMBOL(sptlrpc_parse_rule);
 248
 249 void sptlrpc_rule_set_free(struct sptlrpc_rule_set *rset)
 250 {
 251         LASSERT(rset->srs_nslot ||
 252                 (rset->srs_nrule == 0 && rset->srs_rules == NULL));
 253
 254         if (rset->srs_nslot) {
 255                 OBD_FREE(rset->srs_rules,
 256                          rset->srs_nslot * sizeof(*rset->srs_rules));
 257                 sptlrpc_rule_set_init(rset);
 258         }
 259 }
 260 EXPORT_SYMBOL(sptlrpc_rule_set_free);
 261
 262 /*
 263  * return 0 if the rule set could accomodate one more rule.
 264  */
 265 int sptlrpc_rule_set_expand(struct sptlrpc_rule_set *rset)
 266 {
 267         struct sptlrpc_rule *rules;
 268         int nslot;
 269
 270         might_sleep();
 271
 272         if (rset->srs_nrule < rset->srs_nslot)
 273                 return 0;
 274
 275         nslot = rset->srs_nslot + 8;
 276
 277         /* better use realloc() if available */
 278         OBD_ALLOC(rules, nslot * sizeof(*rset->srs_rules));
 279         if (rules == NULL)
 280                 return -ENOMEM;
 281
 282         if (rset->srs_nrule) {
 283                 LASSERT(rset->srs_nslot && rset->srs_rules);
 284                 memcpy(rules, rset->srs_rules,
 285                        rset->srs_nrule * sizeof(*rset->srs_rules));
 286
 287                 OBD_FREE(rset->srs_rules,
 288                          rset->srs_nslot * sizeof(*rset->srs_rules));
 289         }
 290
 291         rset->srs_rules = rules;
 292         rset->srs_nslot = nslot;
 293         return 0;
 294 }
 295 EXPORT_SYMBOL(sptlrpc_rule_set_expand);
 296
 297 static inline int rule_spec_dir(struct sptlrpc_rule *rule)
 298 {
 299         return (rule->sr_from != LUSTRE_SP_ANY ||
 300                 rule->sr_to != LUSTRE_SP_ANY);
 301 }
 302 static inline int rule_spec_net(struct sptlrpc_rule *rule)
 303 {
 304         return (rule->sr_netid != LNET_NIDNET(LNET_NID_ANY));
 305 }
 306 static inline int rule_match_dir(struct sptlrpc_rule *r1,
 307                                  struct sptlrpc_rule *r2)
 308 {
 309         return (r1->sr_from == r2->sr_from && r1->sr_to == r2->sr_to);
 310 }
 311 static inline int rule_match_net(struct sptlrpc_rule *r1,
 312                                  struct sptlrpc_rule *r2)
 313 {
 314         return (r1->sr_netid == r2->sr_netid);
 315 }
 316
 317 /*
 318  * merge @rule into @rset.
 319  * the @rset slots might be expanded.
 320  */
 321 int sptlrpc_rule_set_merge(struct sptlrpc_rule_set *rset,
 322                            struct sptlrpc_rule *rule)
 323 {
 324         struct sptlrpc_rule      *p = rset->srs_rules;
 325         int                       spec_dir, spec_net;
 326         int                       rc, n, match = 0;
 327
 328         might_sleep();
 329
 330         spec_net = rule_spec_net(rule);
 331         spec_dir = rule_spec_dir(rule);
 332
 333         for (n = 0; n < rset->srs_nrule; n++) {
 334                 p = &rset->srs_rules[n];
 335
 336                 /* test network match, if failed:
 337                  * - spec rule: skip rules which is also spec rule match, until
 338                  *   we hit a wild rule, which means no more chance
 339                  * - wild rule: skip until reach the one which is also wild
 340                  *   and matches
 341                  */
 342                 if (!rule_match_net(p, rule)) {
 343                         if (spec_net) {
 344                                 if (rule_spec_net(p))
 345                                         continue;
 346                                 else
 347                                         break;
 348                         } else {
 349                                 continue;
 350                         }
 351                 }
 352
 353                 /* test dir match, same logic as net matching */
 354                 if (!rule_match_dir(p, rule)) {
 355                         if (spec_dir) {
 356                                 if (rule_spec_dir(p))
 357                                         continue;
 358                                 else
 359                                         break;
 360                         } else {
 361                                 continue;
 362                         }
 363                 }
 364
 365                 /* find a match */
 366                 match = 1;
 367                 break;
 368         }
 369
 370         if (match) {
 371                 LASSERT(n >= 0 && n < rset->srs_nrule);
 372
 373                 if (rule->sr_flvr.sf_rpc == SPTLRPC_FLVR_INVALID) {
 374                         /* remove this rule */
 375                         if (n < rset->srs_nrule - 1)
 376                                 memmove(&rset->srs_rules[n],
 377                                         &rset->srs_rules[n + 1],
 378                                         (rset->srs_nrule - n - 1) *
 379                                         sizeof(*rule));
 380                         rset->srs_nrule--;
 381                 } else {
 382                         /* override the rule */
 383                         memcpy(&rset->srs_rules[n], rule, sizeof(*rule));
 384                 }
 385         } else {
 386                 LASSERT(n >= 0 && n <= rset->srs_nrule);
 387
 388                 if (rule->sr_flvr.sf_rpc != SPTLRPC_FLVR_INVALID) {
 389                         rc = sptlrpc_rule_set_expand(rset);
 390                         if (rc)
 391                                 return rc;
 392
 393                         if (n < rset->srs_nrule)
 394                                 memmove(&rset->srs_rules[n + 1],
 395                                         &rset->srs_rules[n],
 396                                         (rset->srs_nrule - n) * sizeof(*rule));
 397                         memcpy(&rset->srs_rules[n], rule, sizeof(*rule));
 398                         rset->srs_nrule++;
 399                 } else {
 400                         CDEBUG(D_CONFIG, "ignore the unmatched deletion\n");
 401                 }
 402         }
 403
 404         return 0;
 405 }
 406 EXPORT_SYMBOL(sptlrpc_rule_set_merge);
 407
 408 /**
 409  * given from/to/nid, determine a matching flavor in ruleset.
 410  * return 1 if a match found, otherwise return 0.
 411  */
 412 int sptlrpc_rule_set_choose(struct sptlrpc_rule_set *rset,
 413                             enum lustre_sec_part from,
 414                             enum lustre_sec_part to,
 415                             lnet_nid_t nid,
 416                             struct sptlrpc_flavor *sf)
 417 {
 418         struct sptlrpc_rule    *r;
 419         int                     n;
 420
 421         for (n = 0; n < rset->srs_nrule; n++) {
 422                 r = &rset->srs_rules[n];
 423
 424                 if (LNET_NIDNET(nid) != LNET_NIDNET(LNET_NID_ANY) &&
 425                     r->sr_netid != LNET_NIDNET(LNET_NID_ANY) &&
 426                     LNET_NIDNET(nid) != r->sr_netid)
 427                         continue;
 428
 429                 if (from != LUSTRE_SP_ANY && r->sr_from != LUSTRE_SP_ANY &&
 430                     from != r->sr_from)
 431                         continue;
 432
 433                 if (to != LUSTRE_SP_ANY && r->sr_to != LUSTRE_SP_ANY &&
 434                     to != r->sr_to)
 435                         continue;
 436
 437                 *sf = r->sr_flvr;
 438                 return 1;
 439         }
 440
 441         return 0;
 442 }
 443 EXPORT_SYMBOL(sptlrpc_rule_set_choose);
 444
 445 void sptlrpc_rule_set_dump(struct sptlrpc_rule_set *rset)
 446 {
 447         struct sptlrpc_rule *r;
 448         int     n;
 449
 450         for (n = 0; n < rset->srs_nrule; n++) {
 451                 r = &rset->srs_rules[n];
 452                 CDEBUG(D_SEC, "<%02d> from %x to %x, net %x, rpc %x\n", n,
 453                        r->sr_from, r->sr_to, r->sr_netid, r->sr_flvr.sf_rpc);
 454         }
 455 }
 456 EXPORT_SYMBOL(sptlrpc_rule_set_dump);
 457
 458 static int sptlrpc_rule_set_extract(struct sptlrpc_rule_set *gen,
 459                                     struct sptlrpc_rule_set *tgt,
 460                                     enum lustre_sec_part from,
 461                                     enum lustre_sec_part to,
 462                                     struct sptlrpc_rule_set *rset)
 463 {
 464         struct sptlrpc_rule_set *src[2] = { gen, tgt };
 465         struct sptlrpc_rule     *rule;
 466         int                      i, n, rc;
 467
 468         might_sleep();
 469
 470         /* merge general rules firstly, then target-specific rules */
 471         for (i = 0; i < 2; i++) {
 472                 if (src[i] == NULL)
 473                         continue;
 474
 475                 for (n = 0; n < src[i]->srs_nrule; n++) {
 476                         rule = &src[i]->srs_rules[n];
 477
 478                         if (from != LUSTRE_SP_ANY &&
 479                             rule->sr_from != LUSTRE_SP_ANY &&
 480                             rule->sr_from != from)
 481                                 continue;
 482                         if (to != LUSTRE_SP_ANY &&
 483                             rule->sr_to != LUSTRE_SP_ANY &&
 484                             rule->sr_to != to)
 485                                 continue;
 486
 487                         rc = sptlrpc_rule_set_merge(rset, rule);
 488                         if (rc) {
 489                                 CERROR("can't merge: %d\n", rc);
 490                                 return rc;
 491                         }
 492                 }
 493         }
 494
 495         return 0;
 496 }
 497
 498 /**********************************
 499  * sptlrpc configuration support  *
 500  **********************************/
 501
 502 struct sptlrpc_conf_tgt {
 503         cfs_list_t              sct_list;
 504         char                    sct_name[MAX_OBD_NAME];
 505         struct sptlrpc_rule_set sct_rset;
 506 };
 507
 508 struct sptlrpc_conf {
 509         cfs_list_t              sc_list;
 510         char                    sc_fsname[MTI_NAME_MAXLEN];
 511         unsigned int            sc_modified;  /* modified during updating */
 512         unsigned int            sc_updated:1, /* updated copy from MGS */
 513                                 sc_local:1;   /* local copy from target */
 514         struct sptlrpc_rule_set sc_rset;      /* fs general rules */
 515         cfs_list_t              sc_tgts;      /* target-specific rules */
 516 };
 517
 518 static struct mutex sptlrpc_conf_lock;
 519 static CFS_LIST_HEAD(sptlrpc_confs);
 520
 521 static inline int is_hex(char c)
 522 {
 523         return ((c >= '0' && c <= '9') ||
 524                 (c >= 'a' && c <= 'f'));
 525 }
 526
 527 static void target2fsname(const char *tgt, char *fsname, int buflen)
 528 {
 529         const char     *ptr;
 530         int             len;
 531
 532         ptr = strrchr(tgt, '-');
 533         if (ptr) {
 534                 if ((strncmp(ptr, "-MDT", 4) != 0 &&
 535                      strncmp(ptr, "-OST", 4) != 0) ||
 536                     !is_hex(ptr[4]) || !is_hex(ptr[5]) ||
 537                     !is_hex(ptr[6]) || !is_hex(ptr[7]))
 538                         ptr = NULL;
 539         }
 540
 541         /* if we didn't find the pattern, treat the whole string as fsname */
 542         if (ptr == NULL)
 543                 len = strlen(tgt);
 544         else
 545                 len = ptr - tgt;
 546
 547         len = min(len, buflen - 1);
 548         memcpy(fsname, tgt, len);
 549         fsname[len] = '\0';
 550 }
 551
 552 static void sptlrpc_conf_free_rsets(struct sptlrpc_conf *conf)
 553 {
 554         struct sptlrpc_conf_tgt *conf_tgt, *conf_tgt_next;
 555
 556         sptlrpc_rule_set_free(&conf->sc_rset);
 557
 558         cfs_list_for_each_entry_safe(conf_tgt, conf_tgt_next,
 559                                      &conf->sc_tgts, sct_list) {
 560                 sptlrpc_rule_set_free(&conf_tgt->sct_rset);
 561                 cfs_list_del(&conf_tgt->sct_list);
 562                 OBD_FREE_PTR(conf_tgt);
 563         }
 564         LASSERT(cfs_list_empty(&conf->sc_tgts));
 565
 566         conf->sc_updated = 0;
 567         conf->sc_local = 0;
 568 }
 569
 570 static void sptlrpc_conf_free(struct sptlrpc_conf *conf)
 571 {
 572         CDEBUG(D_SEC, "free sptlrpc conf %s\n", conf->sc_fsname);
 573
 574         sptlrpc_conf_free_rsets(conf);
 575         cfs_list_del(&conf->sc_list);
 576         OBD_FREE_PTR(conf);
 577 }
 578
 579 static
 580 struct sptlrpc_conf_tgt *sptlrpc_conf_get_tgt(struct sptlrpc_conf *conf,
 581                                               const char *name,
 582                                               int create)
 583 {
 584         struct sptlrpc_conf_tgt *conf_tgt;
 585
 586         cfs_list_for_each_entry(conf_tgt, &conf->sc_tgts, sct_list) {
 587                 if (strcmp(conf_tgt->sct_name, name) == 0)
 588                         return conf_tgt;
 589         }
 590
 591         if (!create)
 592                 return NULL;
 593
 594         OBD_ALLOC_PTR(conf_tgt);
 595         if (conf_tgt) {
 596                 strlcpy(conf_tgt->sct_name, name, sizeof(conf_tgt->sct_name));
 597                 sptlrpc_rule_set_init(&conf_tgt->sct_rset);
 598                 cfs_list_add(&conf_tgt->sct_list, &conf->sc_tgts);
 599         }
 600
 601         return conf_tgt;
 602 }
 603
 604 static
 605 struct sptlrpc_conf *sptlrpc_conf_get(const char *fsname,
 606                                       int create)
 607 {
 608         struct sptlrpc_conf *conf;
 609
 610         cfs_list_for_each_entry(conf, &sptlrpc_confs, sc_list) {
 611                 if (strcmp(conf->sc_fsname, fsname) == 0)
 612                         return conf;
 613         }
 614
 615         if (!create)
 616                 return NULL;
 617
 618         OBD_ALLOC_PTR(conf);
 619         if (conf == NULL)
 620                 return NULL;
 621
 622         if (strlcpy(conf->sc_fsname, fsname, sizeof(conf->sc_fsname)) >=
 623             sizeof(conf->sc_fsname)) {
 624                 OBD_FREE_PTR(conf);
 625                 return NULL;
 626         }
 627         sptlrpc_rule_set_init(&conf->sc_rset);
 628         CFS_INIT_LIST_HEAD(&conf->sc_tgts);
 629         cfs_list_add(&conf->sc_list, &sptlrpc_confs);
 630
 631         CDEBUG(D_SEC, "create sptlrpc conf %s\n", conf->sc_fsname);
 632         return conf;
 633 }
 634
 635 /**
 636  * caller must hold conf_lock already.
 637  */
 638 static int sptlrpc_conf_merge_rule(struct sptlrpc_conf *conf,
 639                                    const char *target,
 640                                    struct sptlrpc_rule *rule)
 641 {
 642         struct sptlrpc_conf_tgt  *conf_tgt;
 643         struct sptlrpc_rule_set  *rule_set;
 644
 645         /* fsname == target means general rules for the whole fs */
 646         if (strcmp(conf->sc_fsname, target) == 0) {
 647                 rule_set = &conf->sc_rset;
 648         } else {
 649                 conf_tgt = sptlrpc_conf_get_tgt(conf, target, 1);
 650                 if (conf_tgt) {
 651                         rule_set = &conf_tgt->sct_rset;
 652                 } else {
 653                         CERROR("out of memory, can't merge rule!\n");
 654                         return -ENOMEM;
 655                 }
 656         }
 657
 658         return sptlrpc_rule_set_merge(rule_set, rule);
 659 }
 660
 661 /**
 662  * process one LCFG_SPTLRPC_CONF record. if \a conf is NULL, we
 663  * find one through the target name in the record inside conf_lock;
 664  * otherwise means caller already hold conf_lock.
 665  */
 666 static int __sptlrpc_process_config(struct lustre_cfg *lcfg,
 667                                     struct sptlrpc_conf *conf)
 668 {
 669         char                   *target, *param;
 670         char                    fsname[MTI_NAME_MAXLEN];
 671         struct sptlrpc_rule     rule;
 672         int                     rc;
 673         ENTRY;
 674
 675         target = lustre_cfg_string(lcfg, 1);
 676         if (target == NULL) {
 677                 CERROR("missing target name\n");
 678                 RETURN(-EINVAL);
 679         }
 680
 681         param = lustre_cfg_string(lcfg, 2);
 682         if (param == NULL) {
 683                 CERROR("missing parameter\n");
 684                 RETURN(-EINVAL);
 685         }
 686
 687         CDEBUG(D_SEC, "processing rule: %s.%s\n", target, param);
 688
 689         /* parse rule to make sure the format is correct */
 690         if (strncmp(param, PARAM_SRPC_FLVR, sizeof(PARAM_SRPC_FLVR) - 1) != 0) {
 691                 CERROR("Invalid sptlrpc parameter: %s\n", param);
 692                 RETURN(-EINVAL);
 693         }
 694         param += sizeof(PARAM_SRPC_FLVR) - 1;
 695
 696         rc = sptlrpc_parse_rule(param, &rule);
 697         if (rc)
 698                 RETURN(-EINVAL);
 699
 700         if (conf == NULL) {
 701                 target2fsname(target, fsname, sizeof(fsname));
 702
 703                 mutex_lock(&sptlrpc_conf_lock);
 704                 conf = sptlrpc_conf_get(fsname, 0);
 705                 if (conf == NULL) {
 706                         CERROR("can't find conf\n");
 707                         rc = -ENOMEM;
 708                 } else {
 709                         rc = sptlrpc_conf_merge_rule(conf, target, &rule);
 710                 }
 711                 mutex_unlock(&sptlrpc_conf_lock);
 712         } else {
 713                 LASSERT(mutex_is_locked(&sptlrpc_conf_lock));
 714                 rc = sptlrpc_conf_merge_rule(conf, target, &rule);
 715         }
 716
 717         if (rc == 0)
 718                 conf->sc_modified++;
 719
 720         RETURN(rc);
 721 }
 722
 723 int sptlrpc_process_config(struct lustre_cfg *lcfg)
 724 {
 725         return __sptlrpc_process_config(lcfg, NULL);
 726 }
 727 EXPORT_SYMBOL(sptlrpc_process_config);
 728
 729 static int logname2fsname(const char *logname, char *buf, int buflen)
 730 {
 731         char   *ptr;
 732         int     len;
 733
 734         ptr = strrchr(logname, '-');
 735         if (ptr == NULL || strcmp(ptr, "-sptlrpc")) {
 736                 CERROR("%s is not a sptlrpc config log\n", logname);
 737                 return -EINVAL;
 738         }
 739
 740         len = min((int) (ptr - logname), buflen - 1);
 741
 742         memcpy(buf, logname, len);
 743         buf[len] = '\0';
 744         return 0;
 745 }
 746
 747 void sptlrpc_conf_log_update_begin(const char *logname)
 748 {
 749         struct sptlrpc_conf *conf;
 750         char                 fsname[16];
 751
 752         if (logname2fsname(logname, fsname, sizeof(fsname)))
 753                 return;
 754
 755         mutex_lock(&sptlrpc_conf_lock);
 756
 757         conf = sptlrpc_conf_get(fsname, 0);
 758         if (conf) {
 759                 if (conf->sc_local) {
 760                         LASSERT(conf->sc_updated == 0);
 761                         sptlrpc_conf_free_rsets(conf);
 762                 }
 763                 conf->sc_modified = 0;
 764         }
 765
 766         mutex_unlock(&sptlrpc_conf_lock);
 767 }
 768 EXPORT_SYMBOL(sptlrpc_conf_log_update_begin);
 769
 770 /**
 771  * mark a config log has been updated
 772  */
 773 void sptlrpc_conf_log_update_end(const char *logname)
 774 {
 775         struct sptlrpc_conf *conf;
 776         char                 fsname[16];
 777
 778         if (logname2fsname(logname, fsname, sizeof(fsname)))
 779                 return;
 780
 781         mutex_lock(&sptlrpc_conf_lock);
 782
 783         conf = sptlrpc_conf_get(fsname, 0);
 784         if (conf) {
 785                 /*
 786                  * if original state is not updated, make sure the
 787                  * modified counter > 0 to enforce updating local copy.
 788                  */
 789                 if (conf->sc_updated == 0)
 790                         conf->sc_modified++;
 791
 792                 conf->sc_updated = 1;
 793         }
 794
 795         mutex_unlock(&sptlrpc_conf_lock);
 796 }
 797 EXPORT_SYMBOL(sptlrpc_conf_log_update_end);
 798
 799 void sptlrpc_conf_log_start(const char *logname)
 800 {
 801         char                 fsname[16];
 802
 803         if (logname2fsname(logname, fsname, sizeof(fsname)))
 804                 return;
 805
 806         mutex_lock(&sptlrpc_conf_lock);
 807         sptlrpc_conf_get(fsname, 1);
 808         mutex_unlock(&sptlrpc_conf_lock);
 809 }
 810 EXPORT_SYMBOL(sptlrpc_conf_log_start);
 811
 812 void sptlrpc_conf_log_stop(const char *logname)
 813 {
 814         struct sptlrpc_conf *conf;
 815         char                 fsname[16];
 816
 817         if (logname2fsname(logname, fsname, sizeof(fsname)))
 818                 return;
 819
 820         mutex_lock(&sptlrpc_conf_lock);
 821         conf = sptlrpc_conf_get(fsname, 0);
 822         if (conf)
 823                 sptlrpc_conf_free(conf);
 824         mutex_unlock(&sptlrpc_conf_lock);
 825 }
 826 EXPORT_SYMBOL(sptlrpc_conf_log_stop);
 827
 828 static void inline flavor_set_flags(struct sptlrpc_flavor *sf,
 829                                     enum lustre_sec_part from,
 830                                     enum lustre_sec_part to,
 831                                     unsigned int fl_udesc)
 832 {
 833         /*
 834          * null flavor doesn't need to set any flavor, and in fact
 835          * we'd better not do that because everybody share a single sec.
 836          */
 837         if (sf->sf_rpc == SPTLRPC_FLVR_NULL)
 838                 return;
 839
 840         if (from == LUSTRE_SP_MDT) {
 841                 /* MDT->MDT; MDT->OST */
 842                 sf->sf_flags |= PTLRPC_SEC_FL_ROOTONLY;
 843         } else if (from == LUSTRE_SP_CLI && to == LUSTRE_SP_OST) {
 844                 /* CLI->OST */
 845                 sf->sf_flags |= PTLRPC_SEC_FL_ROOTONLY | PTLRPC_SEC_FL_BULK;
 846         } else if (from == LUSTRE_SP_CLI && to == LUSTRE_SP_MDT) {
 847                 /* CLI->MDT */
 848                 if (fl_udesc && sf->sf_rpc != SPTLRPC_FLVR_NULL)
 849                         sf->sf_flags |= PTLRPC_SEC_FL_UDESC;
 850         }
 851 }
 852
 853 void sptlrpc_conf_choose_flavor(enum lustre_sec_part from,
 854                                 enum lustre_sec_part to,
 855                                 struct obd_uuid *target,
 856                                 lnet_nid_t nid,
 857                                 struct sptlrpc_flavor *sf)
 858 {
 859         struct sptlrpc_conf     *conf;
 860         struct sptlrpc_conf_tgt *conf_tgt;
 861         char                     name[MTI_NAME_MAXLEN];
 862         int                      len, rc = 0;
 863
 864         target2fsname(target->uuid, name, sizeof(name));
 865
 866         mutex_lock(&sptlrpc_conf_lock);
 867
 868         conf = sptlrpc_conf_get(name, 0);
 869         if (conf == NULL)
 870                 goto out;
 871
 872         /* convert uuid name (supposed end with _UUID) to target name */
 873         len = strlen(target->uuid);
 874         LASSERT(len > 5);
 875         memcpy(name, target->uuid, len - 5);
 876         name[len - 5] = '\0';
 877
 878         conf_tgt = sptlrpc_conf_get_tgt(conf, name, 0);
 879         if (conf_tgt) {
 880                 rc = sptlrpc_rule_set_choose(&conf_tgt->sct_rset,
 881                                              from, to, nid, sf);
 882                 if (rc)
 883                         goto out;
 884         }
 885
 886         rc = sptlrpc_rule_set_choose(&conf->sc_rset, from, to, nid, sf);
 887 out:
 888         mutex_unlock(&sptlrpc_conf_lock);
 889
 890         if (rc == 0)
 891                 get_default_flavor(sf);
 892
 893         flavor_set_flags(sf, from, to, 1);
 894 }
 895
 896 /**
 897  * called by target devices, determine the expected flavor from
 898  * certain peer (from, nid).
 899  */
 900 void sptlrpc_target_choose_flavor(struct sptlrpc_rule_set *rset,
 901                                   enum lustre_sec_part from,
 902                                   lnet_nid_t nid,
 903                                   struct sptlrpc_flavor *sf)
 904 {
 905         if (sptlrpc_rule_set_choose(rset, from, LUSTRE_SP_ANY, nid, sf) == 0)
 906                 get_default_flavor(sf);
 907 }
 908 EXPORT_SYMBOL(sptlrpc_target_choose_flavor);
 909
 910 #define SEC_ADAPT_DELAY         (10)
 911
 912 /**
 913  * called by client devices, notify the sptlrpc config has changed and
 914  * do import_sec_adapt later.
 915  */
 916 void sptlrpc_conf_client_adapt(struct obd_device *obd)
 917 {
 918         struct obd_import  *imp;
 919         ENTRY;
 920
 921         LASSERT(strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0 ||
 922                 strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME) ==0);
 923         CDEBUG(D_SEC, "obd %s\n", obd->u.cli.cl_target_uuid.uuid);
 924
 925         /* serialize with connect/disconnect import */
 926         down_read(&obd->u.cli.cl_sem);
 927
 928         imp = obd->u.cli.cl_import;
 929         if (imp) {
 930                 spin_lock(&imp->imp_lock);
 931                 if (imp->imp_sec)
 932                         imp->imp_sec_expire = cfs_time_current_sec() +
 933                                 SEC_ADAPT_DELAY;
 934                 spin_unlock(&imp->imp_lock);
 935         }
 936
 937         up_read(&obd->u.cli.cl_sem);
 938         EXIT;
 939 }
 940 EXPORT_SYMBOL(sptlrpc_conf_client_adapt);
 941
 942 #ifdef __KERNEL__
 943
 944 static void rule2string(struct sptlrpc_rule *r, char *buf, int buflen)
 945 {
 946         char    dirbuf[8];
 947         char   *net;
 948         char   *ptr = buf;
 949
 950         if (r->sr_netid == LNET_NIDNET(LNET_NID_ANY))
 951                 net = "default";
 952         else
 953                 net = libcfs_net2str(r->sr_netid);
 954
 955         if (r->sr_from == LUSTRE_SP_ANY && r->sr_to == LUSTRE_SP_ANY)
 956                 dirbuf[0] = '\0';
 957         else
 958                 snprintf(dirbuf, sizeof(dirbuf), ".%s2%s",
 959                          sptlrpc_part2name(r->sr_from),
 960                          sptlrpc_part2name(r->sr_to));
 961
 962         ptr += snprintf(buf, buflen, "srpc.flavor.%s%s=", net, dirbuf);
 963
 964         sptlrpc_flavor2name(&r->sr_flvr, ptr, buflen - (ptr - buf));
 965         buf[buflen - 1] = '\0';
 966 }
 967
 968 static int sptlrpc_record_rule_set(struct llog_handle *llh,
 969                                    char *target,
 970                                    struct sptlrpc_rule_set *rset)
 971 {
 972         struct llog_cfg_rec     *lcr;
 973         struct lustre_cfg_bufs   bufs;
 974         char                     param[48];
 975         int                      i, rc;
 976
 977         for (i = 0; i < rset->srs_nrule; i++) {
 978                 rule2string(&rset->srs_rules[i], param, sizeof(param));
 979
 980                 lustre_cfg_bufs_reset(&bufs, NULL);
 981                 lustre_cfg_bufs_set_string(&bufs, 1, target);
 982                 lustre_cfg_bufs_set_string(&bufs, 2, param);
 983                 lcr = lustre_cfg_rec_new(LCFG_SPTLRPC_CONF, &bufs);
 984                 if (lcr == NULL)
 985                         return -ENOMEM;
 986                 rc = llog_write(NULL, llh, &lcr->lcr_hdr, LLOG_NEXT_IDX);
 987                 lustre_cfg_rec_free(lcr);
 988                 if (rc)
 989                         return rc;
 990         }
 991         return 0;
 992 }
 993
 994 static int sptlrpc_record_rules(struct llog_handle *llh,
 995                                 struct sptlrpc_conf *conf)
 996 {
 997         struct sptlrpc_conf_tgt *conf_tgt;
 998
 999         sptlrpc_record_rule_set(llh, conf->sc_fsname, &conf->sc_rset);
1000
1001         cfs_list_for_each_entry(conf_tgt, &conf->sc_tgts, sct_list) {
1002                 sptlrpc_record_rule_set(llh, conf_tgt->sct_name,
1003                                         &conf_tgt->sct_rset);
1004         }
1005         return 0;
1006 }
1007
1008 #define LOG_SPTLRPC_TMP "sptlrpc.tmp"
1009 #define LOG_SPTLRPC     "sptlrpc"
1010
1011 static
1012 int sptlrpc_target_local_copy_conf(struct obd_device *obd,
1013                                    struct sptlrpc_conf *conf)
1014 {
1015         struct llog_handle   *llh = NULL;
1016         struct llog_ctxt     *ctxt;
1017         struct lvfs_run_ctxt  saved;
1018         struct dentry        *dentry;
1019         int                   rc;
1020         ENTRY;
1021
1022         ctxt = llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
1023         if (ctxt == NULL)
1024                 RETURN(-EINVAL);
1025
1026         push_ctxt(&saved, &obd->obd_lvfs_ctxt);
1027
1028         dentry = ll_lookup_one_len(MOUNT_CONFIGS_DIR, current->fs->pwd.dentry,
1029                                    strlen(MOUNT_CONFIGS_DIR));
1030         if (IS_ERR(dentry)) {
1031                 rc = PTR_ERR(dentry);
1032                 CERROR("cannot lookup %s directory: rc = %d\n",
1033                        MOUNT_CONFIGS_DIR, rc);
1034                 GOTO(out_ctx, rc);
1035         }
1036
1037         /* erase the old tmp log */
1038         rc = llog_erase(NULL, ctxt, NULL, LOG_SPTLRPC_TMP);
1039         if (rc < 0 && rc != -ENOENT) {
1040                 CERROR("%s: cannot erase temporary sptlrpc log: rc = %d\n",
1041                        obd->obd_name, rc);
1042                 GOTO(out_dput, rc);
1043         }
1044
1045         /* write temporary log */
1046         rc = llog_open_create(NULL, ctxt, &llh, NULL, LOG_SPTLRPC_TMP);
1047         if (rc)
1048                 GOTO(out_dput, rc);
1049         rc = llog_init_handle(NULL, llh, LLOG_F_IS_PLAIN, NULL);
1050         if (rc)
1051                 GOTO(out_close, rc);
1052
1053         rc = sptlrpc_record_rules(llh, conf);
1054
1055 out_close:
1056         llog_close(NULL, llh);
1057         if (rc == 0)
1058                 rc = lustre_rename(dentry, obd->obd_lvfs_ctxt.pwdmnt,
1059                                    LOG_SPTLRPC_TMP, LOG_SPTLRPC);
1060 out_dput:
1061         dput(dentry);
1062 out_ctx:
1063         pop_ctxt(&saved, &obd->obd_lvfs_ctxt);
1064         llog_ctxt_put(ctxt);
1065         CDEBUG(D_SEC, "target %s: write local sptlrpc conf: rc = %d\n",
1066                 obd->obd_name, rc);
1067         RETURN(rc);
1068 }
1069
1070 static int local_read_handler(const struct lu_env *env,
1071                               struct llog_handle *llh,
1072                               struct llog_rec_hdr *rec, void *data)
1073 {
1074         struct sptlrpc_conf  *conf = (struct sptlrpc_conf *) data;
1075         struct lustre_cfg    *lcfg = (struct lustre_cfg *)(rec + 1);
1076         int                   cfg_len, rc;
1077         ENTRY;
1078
1079         if (rec->lrh_type != OBD_CFG_REC) {
1080                 CERROR("unhandled lrh_type: %#x\n", rec->lrh_type);
1081                 RETURN(-EINVAL);
1082         }
1083
1084         cfg_len = rec->lrh_len - sizeof(struct llog_rec_hdr) -
1085                   sizeof(struct llog_rec_tail);
1086
1087         rc = lustre_cfg_sanity_check(lcfg, cfg_len);
1088         if (rc) {
1089                 CERROR("Insane cfg\n");
1090                 RETURN(rc);
1091         }
1092
1093         if (lcfg->lcfg_command != LCFG_SPTLRPC_CONF) {
1094                 CERROR("invalid command (%x)\n", lcfg->lcfg_command);
1095                 RETURN(-EINVAL);
1096         }
1097
1098         RETURN(__sptlrpc_process_config(lcfg, conf));
1099 }
1100
1101 static
1102 int sptlrpc_target_local_read_conf(struct obd_device *obd,
1103                                    struct sptlrpc_conf *conf)
1104 {
1105         struct llog_handle    *llh = NULL;
1106         struct llog_ctxt      *ctxt;
1107         struct lvfs_run_ctxt   saved;
1108         int                    rc;
1109         ENTRY;
1110
1111         LASSERT(conf->sc_updated == 0 && conf->sc_local == 0);
1112
1113         ctxt = llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
1114         if (ctxt == NULL) {
1115                 CERROR("missing llog context\n");
1116                 RETURN(-EINVAL);
1117         }
1118
1119         push_ctxt(&saved, &obd->obd_lvfs_ctxt);
1120
1121         rc = llog_open(NULL, ctxt, &llh, NULL, LOG_SPTLRPC, LLOG_OPEN_EXISTS);
1122         if (rc < 0) {
1123                 if (rc == -ENOENT)
1124                         rc = 0;
1125                 GOTO(out_pop, rc);
1126         }
1127
1128         rc = llog_init_handle(NULL, llh, LLOG_F_IS_PLAIN, NULL);
1129         if (rc)
1130                 GOTO(out_close, rc);
1131
1132         if (llog_get_size(llh) <= 1) {
1133                 CDEBUG(D_SEC, "no local sptlrpc copy found\n");
1134                 GOTO(out_close, rc = 0);
1135         }
1136
1137         rc = llog_process(NULL, llh, local_read_handler, (void *)conf, NULL);
1138
1139         if (rc == 0) {
1140                 conf->sc_local = 1;
1141         } else {
1142                 sptlrpc_conf_free_rsets(conf);
1143         }
1144
1145 out_close:
1146         llog_close(NULL, llh);
1147 out_pop:
1148         pop_ctxt(&saved, &obd->obd_lvfs_ctxt);
1149         llog_ctxt_put(ctxt);
1150         CDEBUG(D_SEC, "target %s: read local sptlrpc conf: rc = %d\n",
1151                 obd->obd_name, rc);
1152         RETURN(rc);
1153 }
1154
1155 #endif /* __KRENEL__ */
1156
1157 /**
1158  * called by target devices, extract sptlrpc rules which applies to
1159  * this target, to be used for future rpc flavor checking.
1160  */
1161 int sptlrpc_conf_target_get_rules(struct obd_device *obd,
1162                                   struct sptlrpc_rule_set *rset,
1163                                   int initial)
1164 {
1165         struct sptlrpc_conf      *conf;
1166         struct sptlrpc_conf_tgt  *conf_tgt;
1167         enum lustre_sec_part      sp_dst;
1168         char                      fsname[MTI_NAME_MAXLEN];
1169         int                       rc = 0;
1170         ENTRY;
1171
1172         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDT_NAME) == 0) {
1173                 sp_dst = LUSTRE_SP_MDT;
1174         } else if (strcmp(obd->obd_type->typ_name, LUSTRE_OST_NAME) == 0) {
1175                 sp_dst = LUSTRE_SP_OST;
1176         } else {
1177                 CERROR("unexpected obd type %s\n", obd->obd_type->typ_name);
1178                 RETURN(-EINVAL);
1179         }
1180         CDEBUG(D_SEC, "get rules for target %s\n", obd->obd_uuid.uuid);
1181
1182         target2fsname(obd->obd_uuid.uuid, fsname, sizeof(fsname));
1183
1184         mutex_lock(&sptlrpc_conf_lock);
1185
1186         conf = sptlrpc_conf_get(fsname, 0);
1187         if (conf == NULL) {
1188                 CERROR("missing sptlrpc config log\n");
1189                 GOTO(out, rc);
1190         }
1191
1192 #ifdef __KERNEL__
1193         if (conf->sc_updated  == 0) {
1194                 /*
1195                  * always read from local copy. here another option is
1196                  * if we already have a local copy (read from another
1197                  * target device hosted on the same node) we simply use that.
1198                  */
1199                 if (conf->sc_local)
1200                         sptlrpc_conf_free_rsets(conf);
1201
1202                 sptlrpc_target_local_read_conf(obd, conf);
1203         } else {
1204                 LASSERT(conf->sc_local == 0);
1205
1206                 /* write a local copy */
1207                 if (initial || conf->sc_modified)
1208                         sptlrpc_target_local_copy_conf(obd, conf);
1209                 else
1210                         CDEBUG(D_SEC, "unchanged, skip updating local copy\n");
1211         }
1212 #endif
1213
1214         /* extract rule set for this target */
1215         conf_tgt = sptlrpc_conf_get_tgt(conf, obd->obd_name, 0);
1216
1217         rc = sptlrpc_rule_set_extract(&conf->sc_rset,
1218                                       conf_tgt ? &conf_tgt->sct_rset: NULL,
1219                                       LUSTRE_SP_ANY, sp_dst, rset);
1220 out:
1221         mutex_unlock(&sptlrpc_conf_lock);
1222         RETURN(rc);
1223 }
1224 EXPORT_SYMBOL(sptlrpc_conf_target_get_rules);
1225
1226 int  sptlrpc_conf_init(void)
1227 {
1228         mutex_init(&sptlrpc_conf_lock);
1229         return 0;
1230 }
1231
1232 void sptlrpc_conf_fini(void)
1233 {
1234         struct sptlrpc_conf  *conf, *conf_next;
1235
1236         mutex_lock(&sptlrpc_conf_lock);
1237         cfs_list_for_each_entry_safe(conf, conf_next, &sptlrpc_confs, sc_list) {
1238                 sptlrpc_conf_free(conf);
1239         }
1240         LASSERT(cfs_list_empty(&sptlrpc_confs));
1241         mutex_unlock(&sptlrpc_conf_lock);
1242 }