lustre/ptlrpc/sec_config.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   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.
  11  *
  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).
  17  *
  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
  21  *
  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
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  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 #ifndef EXPORT_SYMTAB
  38 #define EXPORT_SYMTAB
  39 #endif
  40 #define DEBUG_SUBSYSTEM S_SEC
  41
  42 #include <libcfs/libcfs.h>
  43 #ifndef __KERNEL__
  44 #include <liblustre.h>
  45 #include <libcfs/list.h>
  46 #else
  47 #include <linux/crypto.h>
  48 #include <linux/key.h>
  49 #endif
  50
  51 #include <obd.h>
  52 #include <obd_class.h>
  53 #include <obd_support.h>
  54 #include <lustre_net.h>
  55 #include <lustre_import.h>
  56 #include <lustre_log.h>
  57 #include <lustre_disk.h>
  58 #include <lustre_dlm.h>
  59 #include <lustre_param.h>
  60 #include <lustre_sec.h>
  61
  62 #include "ptlrpc_internal.h"
  63
  64 const char *sptlrpc_part2name(enum lustre_sec_part part)
  65 {
  66         switch (part) {
  67         case LUSTRE_SP_CLI:
  68                 return "cli";
  69         case LUSTRE_SP_MDT:
  70                 return "mdt";
  71         case LUSTRE_SP_OST:
  72                 return "ost";
  73         case LUSTRE_SP_MGC:
  74                 return "mgc";
  75         case LUSTRE_SP_MGS:
  76                 return "mgs";
  77         case LUSTRE_SP_ANY:
  78                 return "any";
  79         default:
  80                 return "err";
  81         }
  82 }
  83 EXPORT_SYMBOL(sptlrpc_part2name);
  84
  85 enum lustre_sec_part sptlrpc_target_sec_part(struct obd_device *obd)
  86 {
  87         const char *type = obd->obd_type->typ_name;
  88
  89         if (!strcmp(type, LUSTRE_MDT_NAME))
  90                 return LUSTRE_SP_MDT;
  91         if (!strcmp(type, LUSTRE_OST_NAME))
  92                 return LUSTRE_SP_OST;
  93         if (!strcmp(type, LUSTRE_MGS_NAME))
  94                 return LUSTRE_SP_MGS;
  95
  96         CERROR("unknown target %p(%s)\n", obd, type);
  97         return LUSTRE_SP_ANY;
  98 }
  99 EXPORT_SYMBOL(sptlrpc_target_sec_part);
 100
 101 /****************************************
 102  * user supplied flavor string parsing  *
 103  ****************************************/
 104
 105 #ifdef HAVE_ADLER
 106 #define BULK_HASH_ALG_DEFAULT   BULK_HASH_ALG_ADLER32
 107 #else
 108 #define BULK_HASH_ALG_DEFAULT   BULK_HASH_ALG_CRC32
 109 #endif
 110
 111 typedef enum {
 112         BULK_TYPE_N = 0,
 113         BULK_TYPE_I = 1,
 114         BULK_TYPE_P = 2
 115 } bulk_type_t;
 116
 117 static void get_default_flavor(struct sptlrpc_flavor *sf)
 118 {
 119         sf->sf_rpc = SPTLRPC_FLVR_NULL;
 120         sf->sf_bulk_ciph = BULK_CIPH_ALG_NULL;
 121         sf->sf_bulk_hash = BULK_HASH_ALG_NULL;
 122         sf->sf_flags = 0;
 123 }
 124
 125 static void get_flavor_by_rpc(struct sptlrpc_flavor *flvr, __u16 rpc_flavor)
 126 {
 127         get_default_flavor(flvr);
 128
 129         flvr->sf_rpc = rpc_flavor;
 130
 131         switch (rpc_flavor) {
 132         case SPTLRPC_FLVR_NULL:
 133                 break;
 134         case SPTLRPC_FLVR_PLAIN:
 135         case SPTLRPC_FLVR_KRB5N:
 136         case SPTLRPC_FLVR_KRB5A:
 137                 flvr->sf_bulk_hash = BULK_HASH_ALG_DEFAULT;
 138                 break;
 139         case SPTLRPC_FLVR_KRB5P:
 140                 flvr->sf_bulk_ciph = BULK_CIPH_ALG_AES128;
 141                 /* fall through */
 142         case SPTLRPC_FLVR_KRB5I:
 143                 flvr->sf_bulk_hash = BULK_HASH_ALG_SHA1;
 144                 break;
 145         default:
 146                 LBUG();
 147         }
 148 }
 149
 150 static void get_flavor_by_bulk(struct sptlrpc_flavor *flvr,
 151                                __u16 rpc_flavor, bulk_type_t bulk_type)
 152 {
 153         switch (bulk_type) {
 154         case BULK_TYPE_N:
 155                 flvr->sf_bulk_hash = BULK_HASH_ALG_NULL;
 156                 flvr->sf_bulk_ciph = BULK_CIPH_ALG_NULL;
 157                 break;
 158         case BULK_TYPE_I:
 159                 switch (rpc_flavor) {
 160                 case SPTLRPC_FLVR_PLAIN:
 161                 case SPTLRPC_FLVR_KRB5N:
 162                 case SPTLRPC_FLVR_KRB5A:
 163                         flvr->sf_bulk_hash = BULK_HASH_ALG_DEFAULT;
 164                         break;
 165                 case SPTLRPC_FLVR_KRB5I:
 166                 case SPTLRPC_FLVR_KRB5P:
 167                         flvr->sf_bulk_hash = BULK_HASH_ALG_SHA1;
 168                         break;
 169                 default:
 170                         LBUG();
 171                 }
 172                 flvr->sf_bulk_ciph = BULK_CIPH_ALG_NULL;
 173                 break;
 174         case BULK_TYPE_P:
 175                 flvr->sf_bulk_hash = BULK_HASH_ALG_SHA1;
 176                 flvr->sf_bulk_ciph = BULK_CIPH_ALG_AES128;
 177                 break;
 178         default:
 179                 LBUG();
 180         }
 181 }
 182
 183 static __u16 __flavors[] = {
 184         SPTLRPC_FLVR_NULL,
 185         SPTLRPC_FLVR_PLAIN,
 186         SPTLRPC_FLVR_KRB5N,
 187         SPTLRPC_FLVR_KRB5A,
 188         SPTLRPC_FLVR_KRB5I,
 189         SPTLRPC_FLVR_KRB5P,
 190 };
 191
 192 #define __nflavors      ARRAY_SIZE(__flavors)
 193
 194 /*
 195  * flavor string format: rpc[-bulk{n|i|p}[:cksum/enc]]
 196  * for examples:
 197  *  null
 198  *  plain-bulki
 199  *  krb5p-bulkn
 200  *  krb5i-bulkp
 201  *  krb5i-bulkp:sha512/arc4
 202  */
 203 static int parse_flavor(const char *str, struct sptlrpc_flavor *flvr)
 204 {
 205         const char     *f;
 206         char           *bulk, *alg, *enc;
 207         char            buf[64];
 208         bulk_type_t     bulk_type;
 209         __u8            i;
 210         ENTRY;
 211
 212         if (str == NULL || str[0] == '\0') {
 213                 flvr->sf_rpc = SPTLRPC_FLVR_INVALID;
 214                 goto out;
 215         }
 216
 217         for (i = 0; i < __nflavors; i++) {
 218                 f = sptlrpc_rpcflavor2name(__flavors[i]);
 219                 if (strncmp(str, f, strlen(f)) == 0)
 220                         break;
 221         }
 222
 223         if (i >= __nflavors)
 224                 GOTO(invalid, -EINVAL);
 225
 226         /* prepare local buffer thus we can modify it as we want */
 227         strncpy(buf, str, 64);
 228         buf[64 - 1] = '\0';
 229
 230         /* find bulk string */
 231         bulk = strchr(buf, '-');
 232         if (bulk)
 233                 *bulk++ = '\0';
 234
 235         /* now the first part must equal to rpc flavor name */
 236         if (strcmp(buf, f) != 0)
 237                 GOTO(invalid, -EINVAL);
 238
 239         get_flavor_by_rpc(flvr, __flavors[i]);
 240
 241         if (bulk == NULL)
 242                 goto out;
 243
 244         /* find bulk algorithm string */
 245         alg = strchr(bulk, ':');
 246         if (alg)
 247                 *alg++ = '\0';
 248
 249         /* verify bulk section */
 250         if (strcmp(bulk, "bulkn") == 0) {
 251                 flvr->sf_bulk_hash = BULK_HASH_ALG_NULL;
 252                 flvr->sf_bulk_ciph = BULK_CIPH_ALG_NULL;
 253                 bulk_type = BULK_TYPE_N;
 254         } else if (strcmp(bulk, "bulki") == 0)
 255                 bulk_type = BULK_TYPE_I;
 256         else if (strcmp(bulk, "bulkp") == 0)
 257                 bulk_type = BULK_TYPE_P;
 258         else
 259                 GOTO(invalid, -EINVAL);
 260
 261         /* null flavor don't support bulk i/p */
 262         if (__flavors[i] == SPTLRPC_FLVR_NULL && bulk_type != BULK_TYPE_N)
 263                 GOTO(invalid, -EINVAL);
 264
 265         /* plain policy dosen't support bulk p */
 266         if (__flavors[i] == SPTLRPC_FLVR_PLAIN && bulk_type == BULK_TYPE_P)
 267                 GOTO(invalid, -EINVAL);
 268
 269         get_flavor_by_bulk(flvr, __flavors[i], bulk_type);
 270
 271         if (alg == NULL)
 272                 goto out;
 273
 274         /* find encryption algorithm string */
 275         enc = strchr(alg, '/');
 276         if (enc)
 277                 *enc++ = '\0';
 278
 279         /* checksum algorithm */
 280         for (i = 0; i < BULK_HASH_ALG_MAX; i++) {
 281                 if (strcmp(alg, sptlrpc_get_hash_name(i)) == 0) {
 282                         flvr->sf_bulk_hash = i;
 283                         break;
 284                 }
 285         }
 286         if (i >= BULK_HASH_ALG_MAX)
 287                 GOTO(invalid, -EINVAL);
 288
 289         /* privacy algorithm */
 290         if (enc) {
 291                 for (i = 0; i < BULK_CIPH_ALG_MAX; i++) {
 292                         if (strcmp(enc, sptlrpc_get_ciph_name(i)) == 0) {
 293                                 flvr->sf_bulk_ciph = i;
 294                                 break;
 295                         }
 296                 }
 297                 if (i >= BULK_CIPH_ALG_MAX)
 298                         GOTO(invalid, -EINVAL);
 299         }
 300
 301         /*
 302          * bulk combination sanity checks
 303          */
 304         if (bulk_type == BULK_TYPE_P &&
 305             flvr->sf_bulk_ciph == BULK_CIPH_ALG_NULL)
 306                 GOTO(invalid, -EINVAL);
 307
 308         if (bulk_type == BULK_TYPE_I &&
 309             (flvr->sf_bulk_hash == BULK_HASH_ALG_NULL ||
 310              flvr->sf_bulk_ciph != BULK_CIPH_ALG_NULL))
 311                 GOTO(invalid, -EINVAL);
 312
 313         if (bulk_type == BULK_TYPE_N &&
 314             (flvr->sf_bulk_hash != BULK_HASH_ALG_NULL ||
 315              flvr->sf_bulk_ciph != BULK_CIPH_ALG_NULL))
 316                 GOTO(invalid, -EINVAL);
 317
 318 out:
 319         return 0;
 320 invalid:
 321         CERROR("invalid flavor string: %s\n", str);
 322         return -EINVAL;
 323 }
 324
 325 /****************************************
 326  * configure rules                      *
 327  ****************************************/
 328
 329 static void sptlrpc_rule_init(struct sptlrpc_rule *rule)
 330 {
 331         rule->sr_netid = LNET_NIDNET(LNET_NID_ANY);
 332         rule->sr_from = LUSTRE_SP_ANY;
 333         rule->sr_to = LUSTRE_SP_ANY;
 334         rule->sr_padding = 0;
 335
 336         get_default_flavor(&rule->sr_flvr);
 337 }
 338
 339 /*
 340  * format: network[.direction]=flavor
 341  */
 342 int sptlrpc_parse_rule(char *param, struct sptlrpc_rule *rule)
 343 {
 344         char           *flavor, *dir;
 345         int             rc;
 346
 347         sptlrpc_rule_init(rule);
 348
 349         flavor = strchr(param, '=');
 350         if (flavor == NULL) {
 351                 CERROR("invalid param, no '='\n");
 352                 RETURN(-EINVAL);
 353         }
 354         *flavor++ = '\0';
 355
 356         dir = strchr(param, '.');
 357         if (dir)
 358                 *dir++ = '\0';
 359
 360         /* 1.1 network */
 361         if (strcmp(param, "default")) {
 362                 rule->sr_netid = libcfs_str2net(param);
 363                 if (rule->sr_netid == LNET_NIDNET(LNET_NID_ANY)) {
 364                         CERROR("invalid network name: %s\n", param);
 365                         RETURN(-EINVAL);
 366                 }
 367         }
 368
 369         /* 1.2 direction */
 370         if (dir) {
 371                 if (!strcmp(dir, "mdt2ost")) {
 372                         rule->sr_from = LUSTRE_SP_MDT;
 373                         rule->sr_to = LUSTRE_SP_OST;
 374                 } else if (!strcmp(dir, "mdt2mdt")) {
 375                         rule->sr_from = LUSTRE_SP_MDT;
 376                         rule->sr_to = LUSTRE_SP_MDT;
 377                 } else if (!strcmp(dir, "cli2ost")) {
 378                         rule->sr_from = LUSTRE_SP_CLI;
 379                         rule->sr_to = LUSTRE_SP_OST;
 380                 } else if (!strcmp(dir, "cli2mdt")) {
 381                         rule->sr_from = LUSTRE_SP_CLI;
 382                         rule->sr_to = LUSTRE_SP_MDT;
 383                 } else {
 384                         CERROR("invalid rule dir segment: %s\n", dir);
 385                         RETURN(-EINVAL);
 386                 }
 387         }
 388
 389         /* 2.1 flavor */
 390         rc = parse_flavor(flavor, &rule->sr_flvr);
 391         if (rc)
 392                 RETURN(-EINVAL);
 393
 394         RETURN(0);
 395 }
 396 EXPORT_SYMBOL(sptlrpc_parse_rule);
 397
 398 void sptlrpc_rule_set_free(struct sptlrpc_rule_set *rset)
 399 {
 400         LASSERT(rset->srs_nslot ||
 401                 (rset->srs_nrule == 0 && rset->srs_rules == NULL));
 402
 403         if (rset->srs_nslot) {
 404                 OBD_FREE(rset->srs_rules,
 405                          rset->srs_nslot * sizeof(*rset->srs_rules));
 406                 sptlrpc_rule_set_init(rset);
 407         }
 408 }
 409 EXPORT_SYMBOL(sptlrpc_rule_set_free);
 410
 411 /*
 412  * return 0 if the rule set could accomodate one more rule.
 413  * if @expand != 0, the rule set might be expanded.
 414  */
 415 int sptlrpc_rule_set_expand(struct sptlrpc_rule_set *rset, int expand)
 416 {
 417         struct sptlrpc_rule *rules;
 418         int nslot;
 419
 420         if (rset->srs_nrule < rset->srs_nslot)
 421                 return 0;
 422
 423         if (expand == 0)
 424                 return -E2BIG;
 425
 426         nslot = rset->srs_nslot + 8;
 427
 428         /* better use realloc() if available */
 429         OBD_ALLOC(rules, nslot * sizeof(*rset->srs_rules));
 430         if (rules == NULL)
 431                 return -ENOMEM;
 432
 433         if (rset->srs_nrule) {
 434                 LASSERT(rset->srs_nslot && rset->srs_rules);
 435                 memcpy(rules, rset->srs_rules,
 436                        rset->srs_nrule * sizeof(*rset->srs_rules));
 437
 438                 OBD_FREE(rset->srs_rules,
 439                          rset->srs_nslot * sizeof(*rset->srs_rules));
 440         }
 441
 442         rset->srs_rules = rules;
 443         rset->srs_nslot = nslot;
 444         return 0;
 445 }
 446 EXPORT_SYMBOL(sptlrpc_rule_set_expand);
 447
 448 static inline int rule_spec_dir(struct sptlrpc_rule *rule)
 449 {
 450         return (rule->sr_from != LUSTRE_SP_ANY ||
 451                 rule->sr_to != LUSTRE_SP_ANY);
 452 }
 453 static inline int rule_spec_net(struct sptlrpc_rule *rule)
 454 {
 455         return (rule->sr_netid != LNET_NIDNET(LNET_NID_ANY));
 456 }
 457 static inline int rule_match_dir(struct sptlrpc_rule *r1,
 458                                  struct sptlrpc_rule *r2)
 459 {
 460         return (r1->sr_from == r2->sr_from && r1->sr_to == r2->sr_to);
 461 }
 462 static inline int rule_match_net(struct sptlrpc_rule *r1,
 463                                  struct sptlrpc_rule *r2)
 464 {
 465         return (r1->sr_netid == r2->sr_netid);
 466 }
 467
 468 /*
 469  * merge @rule into @rset.
 470  * if @expand != 0 then @rset slots might be expanded.
 471  */
 472 int sptlrpc_rule_set_merge(struct sptlrpc_rule_set *rset,
 473                            struct sptlrpc_rule *rule,
 474                            int expand)
 475 {
 476         struct sptlrpc_rule      *p = rset->srs_rules;
 477         int                       spec_dir, spec_net;
 478         int                       rc, n, match = 0;
 479
 480         spec_net = rule_spec_net(rule);
 481         spec_dir = rule_spec_dir(rule);
 482
 483         for (n = 0; n < rset->srs_nrule; n++) {
 484                 p = &rset->srs_rules[n];
 485
 486                 /* test network match, if failed:
 487                  * - spec rule: skip rules which is also spec rule match, until
 488                  *   we hit a wild rule, which means no more chance
 489                  * - wild rule: skip until reach the one which is also wild
 490                  *   and matches
 491                  */
 492                 if (!rule_match_net(p, rule)) {
 493                         if (spec_net) {
 494                                 if (rule_spec_net(p))
 495                                         continue;
 496                                 else
 497                                         break;
 498                         } else {
 499                                 continue;
 500                         }
 501                 }
 502
 503                 /* test dir match, same logic as net matching */
 504                 if (!rule_match_dir(p, rule)) {
 505                         if (spec_dir) {
 506                                 if (rule_spec_dir(p))
 507                                         continue;
 508                                 else
 509                                         break;
 510                         } else {
 511                                 continue;
 512                         }
 513                 }
 514
 515                 /* find a match */
 516                 match = 1;
 517                 break;
 518         }
 519
 520         if (match) {
 521                 LASSERT(n >= 0 && n < rset->srs_nrule);
 522
 523                 if (rule->sr_flvr.sf_rpc == SPTLRPC_FLVR_INVALID) {
 524                         /* remove this rule */
 525                         if (n < rset->srs_nrule - 1)
 526                                 memmove(&rset->srs_rules[n],
 527                                         &rset->srs_rules[n + 1],
 528                                         (rset->srs_nrule - n - 1) *
 529                                         sizeof(*rule));
 530                         rset->srs_nrule--;
 531                 } else {
 532                         /* override the rule */
 533                         memcpy(&rset->srs_rules[n], rule, sizeof(*rule));
 534                 }
 535         } else {
 536                 LASSERT(n >= 0 && n <= rset->srs_nrule);
 537
 538                 if (rule->sr_flvr.sf_rpc != SPTLRPC_FLVR_INVALID) {
 539                         rc = sptlrpc_rule_set_expand(rset, expand);
 540                         if (rc)
 541                                 return rc;
 542
 543                         if (n < rset->srs_nrule)
 544                                 memmove(&rset->srs_rules[n + 1],
 545                                         &rset->srs_rules[n],
 546                                         (rset->srs_nrule - n) * sizeof(*rule));
 547                         memcpy(&rset->srs_rules[n], rule, sizeof(*rule));
 548                         rset->srs_nrule++;
 549                 } else {
 550                         CDEBUG(D_CONFIG, "ignore the unmatched deletion\n");
 551                 }
 552         }
 553
 554         return 0;
 555 }
 556 EXPORT_SYMBOL(sptlrpc_rule_set_merge);
 557
 558 /**
 559  * given from/to/nid, determine a matching flavor in ruleset.
 560  * return 1 if a match found, otherwise return 0.
 561  */
 562 static int sptlrpc_rule_set_choose(struct sptlrpc_rule_set *rset,
 563                                    enum lustre_sec_part from,
 564                                    enum lustre_sec_part to,
 565                                    lnet_nid_t nid,
 566                                    struct sptlrpc_flavor *sf)
 567 {
 568         struct sptlrpc_rule    *r;
 569         int                     n;
 570
 571         for (n = 0; n < rset->srs_nrule; n++) {
 572                 r = &rset->srs_rules[n];
 573
 574                 if (LNET_NIDNET(nid) != LNET_NIDNET(LNET_NID_ANY) &&
 575                     r->sr_netid != LNET_NIDNET(LNET_NID_ANY) &&
 576                     LNET_NIDNET(nid) != r->sr_netid)
 577                         continue;
 578
 579                 if (from != LUSTRE_SP_ANY && r->sr_from != LUSTRE_SP_ANY &&
 580                     from != r->sr_from)
 581                         continue;
 582
 583                 if (to != LUSTRE_SP_ANY && r->sr_to != LUSTRE_SP_ANY &&
 584                     to != r->sr_to)
 585                         continue;
 586
 587                 *sf = r->sr_flvr;
 588                 return 1;
 589         }
 590
 591         return 0;
 592 }
 593
 594 void sptlrpc_rule_set_dump(struct sptlrpc_rule_set *rset)
 595 {
 596         struct sptlrpc_rule *r;
 597         int     n;
 598
 599         for (n = 0; n < rset->srs_nrule; n++) {
 600                 r = &rset->srs_rules[n];
 601                 CWARN("<%02d> from %x to %x, net %x, rpc %x\n", n,
 602                       r->sr_from, r->sr_to, r->sr_netid, r->sr_flvr.sf_rpc);
 603         }
 604 }
 605 EXPORT_SYMBOL(sptlrpc_rule_set_dump);
 606
 607 static int sptlrpc_rule_set_extract(struct sptlrpc_rule_set *gen,
 608                                     struct sptlrpc_rule_set *tgt,
 609                                     enum lustre_sec_part from,
 610                                     enum lustre_sec_part to,
 611                                     struct sptlrpc_rule_set *rset)
 612 {
 613         struct sptlrpc_rule_set *src[2] = { gen, tgt };
 614         struct sptlrpc_rule     *rule;
 615         int                      i, n, rc;
 616
 617         /* merge general rules firstly, then target-specific rules */
 618         for (i = 0; i < 2; i++) {
 619                 if (src[i] == NULL)
 620                         continue;
 621
 622                 for (n = 0; n < src[i]->srs_nrule; n++) {
 623                         rule = &src[i]->srs_rules[n];
 624
 625                         if (from != LUSTRE_SP_ANY &&
 626                             rule->sr_from != LUSTRE_SP_ANY &&
 627                             rule->sr_from != from)
 628                                 continue;
 629                         if (to != LUSTRE_SP_ANY &&
 630                             rule->sr_to != LUSTRE_SP_ANY &&
 631                             rule->sr_to != to)
 632                                 continue;
 633
 634                         rc = sptlrpc_rule_set_merge(rset, rule, 1);
 635                         if (rc) {
 636                                 CERROR("can't merge: %d\n", rc);
 637                                 return rc;
 638                         }
 639                 }
 640         }
 641
 642         return 0;
 643 }
 644
 645 /**********************************
 646  * sptlrpc configuration support  *
 647  **********************************/
 648
 649 struct sptlrpc_conf_tgt {
 650         struct list_head        sct_list;
 651         char                    sct_name[MAX_OBD_NAME];
 652         struct sptlrpc_rule_set sct_rset;
 653 };
 654
 655 struct sptlrpc_conf {
 656         struct list_head        sc_list;
 657         char                    sc_fsname[MTI_NAME_MAXLEN];
 658         unsigned int            sc_modified;  /* modified during updating */
 659         unsigned int            sc_updated:1, /* updated copy from MGS */
 660                                 sc_local:1;   /* local copy from target */
 661         struct sptlrpc_rule_set sc_rset;      /* fs general rules */
 662         struct list_head        sc_tgts;      /* target-specific rules */
 663 };
 664
 665 static struct mutex sptlrpc_conf_lock;
 666 static CFS_LIST_HEAD(sptlrpc_confs);
 667
 668 static inline int is_hex(char c)
 669 {
 670         return ((c >= '0' && c <= '9') ||
 671                 (c >= 'a' && c <= 'f'));
 672 }
 673
 674 static void target2fsname(const char *tgt, char *fsname, int buflen)
 675 {
 676         const char     *ptr;
 677         int             len;
 678
 679         ptr = strrchr(tgt, '-');
 680         if (ptr) {
 681                 if ((strncmp(ptr, "-MDT", 4) != 0 &&
 682                      strncmp(ptr, "-OST", 4) != 0) ||
 683                     !is_hex(ptr[4]) || !is_hex(ptr[5]) ||
 684                     !is_hex(ptr[6]) || !is_hex(ptr[7]))
 685                         ptr = NULL;
 686         }
 687
 688         /* if we didn't find the pattern, treat the whole string as fsname */
 689         if (ptr == NULL)
 690                 len = strlen(tgt);
 691         else
 692                 len = ptr - tgt;
 693
 694         len = min(len, buflen - 1);
 695         memcpy(fsname, tgt, len);
 696         fsname[len] = '\0';
 697 }
 698
 699 static void sptlrpc_conf_free_rsets(struct sptlrpc_conf *conf)
 700 {
 701         struct sptlrpc_conf_tgt *conf_tgt, *conf_tgt_next;
 702
 703         sptlrpc_rule_set_free(&conf->sc_rset);
 704
 705         list_for_each_entry_safe(conf_tgt, conf_tgt_next,
 706                                  &conf->sc_tgts, sct_list) {
 707                 sptlrpc_rule_set_free(&conf_tgt->sct_rset);
 708                 list_del(&conf_tgt->sct_list);
 709                 OBD_FREE_PTR(conf_tgt);
 710         }
 711         LASSERT(list_empty(&conf->sc_tgts));
 712
 713         conf->sc_updated = 0;
 714         conf->sc_local = 0;
 715 }
 716
 717 static void sptlrpc_conf_free(struct sptlrpc_conf *conf)
 718 {
 719         CDEBUG(D_SEC, "free sptlrpc conf %s\n", conf->sc_fsname);
 720
 721         sptlrpc_conf_free_rsets(conf);
 722         list_del(&conf->sc_list);
 723         OBD_FREE_PTR(conf);
 724 }
 725
 726 static
 727 struct sptlrpc_conf_tgt *sptlrpc_conf_get_tgt(struct sptlrpc_conf *conf,
 728                                               const char *name,
 729                                               int create)
 730 {
 731         struct sptlrpc_conf_tgt *conf_tgt;
 732
 733         list_for_each_entry(conf_tgt, &conf->sc_tgts, sct_list) {
 734                 if (strcmp(conf_tgt->sct_name, name) == 0)
 735                         return conf_tgt;
 736         }
 737
 738         if (!create)
 739                 return NULL;
 740
 741         OBD_ALLOC_PTR(conf_tgt);
 742         if (conf_tgt) {
 743                 strncpy(conf_tgt->sct_name, name, sizeof(conf_tgt->sct_name));
 744                 sptlrpc_rule_set_init(&conf_tgt->sct_rset);
 745                 list_add(&conf_tgt->sct_list, &conf->sc_tgts);
 746         }
 747
 748         return conf_tgt;
 749 }
 750
 751 static
 752 struct sptlrpc_conf *sptlrpc_conf_get(const char *fsname,
 753                                       int create)
 754 {
 755         struct sptlrpc_conf *conf;
 756
 757         list_for_each_entry(conf, &sptlrpc_confs, sc_list) {
 758                 if (strcmp(conf->sc_fsname, fsname) == 0)
 759                         return conf;
 760         }
 761
 762         if (!create)
 763                 return NULL;
 764
 765         OBD_ALLOC_PTR(conf);
 766         if (conf == NULL)
 767                 return NULL;
 768
 769         strcpy(conf->sc_fsname, fsname);
 770         sptlrpc_rule_set_init(&conf->sc_rset);
 771         CFS_INIT_LIST_HEAD(&conf->sc_tgts);
 772         list_add(&conf->sc_list, &sptlrpc_confs);
 773
 774         CDEBUG(D_SEC, "create sptlrpc conf %s\n", conf->sc_fsname);
 775         return conf;
 776 }
 777
 778 /**
 779  * caller must hold conf_lock already.
 780  */
 781 static int sptlrpc_conf_merge_rule(struct sptlrpc_conf *conf,
 782                                    const char *target,
 783                                    struct sptlrpc_rule *rule)
 784 {
 785         struct sptlrpc_conf_tgt  *conf_tgt;
 786         struct sptlrpc_rule_set  *rule_set;
 787
 788         /* fsname == target means general rules for the whole fs */
 789         if (strcmp(conf->sc_fsname, target) == 0) {
 790                 rule_set = &conf->sc_rset;
 791         } else {
 792                 conf_tgt = sptlrpc_conf_get_tgt(conf, target, 1);
 793                 if (conf_tgt) {
 794                         rule_set = &conf_tgt->sct_rset;
 795                 } else {
 796                         CERROR("out of memory, can't merge rule!\n");
 797                         return -ENOMEM;
 798                 }
 799         }
 800
 801         return sptlrpc_rule_set_merge(rule_set, rule, 1);
 802 }
 803
 804 /**
 805  * process one LCFG_SPTLRPC_CONF record. if \a conf is NULL, we
 806  * find one through the target name in the record inside conf_lock;
 807  * otherwise means caller already hold conf_lock.
 808  */
 809 static int __sptlrpc_process_config(struct lustre_cfg *lcfg,
 810                                     struct sptlrpc_conf *conf)
 811 {
 812         char                   *target, *param;
 813         char                    fsname[MTI_NAME_MAXLEN];
 814         struct sptlrpc_rule     rule;
 815         int                     rc;
 816         ENTRY;
 817
 818         target = lustre_cfg_string(lcfg, 1);
 819         if (target == NULL) {
 820                 CERROR("missing target name\n");
 821                 RETURN(-EINVAL);
 822         }
 823
 824         param = lustre_cfg_string(lcfg, 2);
 825         if (param == NULL) {
 826                 CERROR("missing parameter\n");
 827                 RETURN(-EINVAL);
 828         }
 829
 830         /* parse rule to make sure the format is correct */
 831         if (strncmp(param, PARAM_SRPC_FLVR, sizeof(PARAM_SRPC_FLVR) - 1) != 0) {
 832                 CERROR("Invalid sptlrpc parameter: %s\n", param);
 833                 RETURN(-EINVAL);
 834         }
 835         param += sizeof(PARAM_SRPC_FLVR) - 1;
 836
 837         rc = sptlrpc_parse_rule(param, &rule);
 838         if (rc)
 839                 RETURN(-EINVAL);
 840
 841         if (conf == NULL) {
 842                 target2fsname(target, fsname, sizeof(fsname));
 843
 844                 mutex_lock(&sptlrpc_conf_lock);
 845                 conf = sptlrpc_conf_get(fsname, 0);
 846                 if (conf == NULL) {
 847                         CERROR("can't find conf\n");
 848                         rc = -ENOMEM;
 849                 } else {
 850                         rc = sptlrpc_conf_merge_rule(conf, target, &rule);
 851                 }
 852                 mutex_unlock(&sptlrpc_conf_lock);
 853         } else {
 854                 LASSERT(mutex_is_locked(&sptlrpc_conf_lock));
 855                 rc = sptlrpc_conf_merge_rule(conf, target, &rule);
 856         }
 857
 858         if (rc == 0)
 859                 conf->sc_modified++;
 860
 861         RETURN(rc);
 862 }
 863
 864 int sptlrpc_process_config(struct lustre_cfg *lcfg)
 865 {
 866         return __sptlrpc_process_config(lcfg, NULL);
 867 }
 868 EXPORT_SYMBOL(sptlrpc_process_config);
 869
 870 static int logname2fsname(const char *logname, char *buf, int buflen)
 871 {
 872         char   *ptr;
 873         int     len;
 874
 875         ptr = strrchr(logname, '-');
 876         if (ptr == NULL || strcmp(ptr, "-sptlrpc")) {
 877                 CERROR("%s is not a sptlrpc config log\n", logname);
 878                 return -EINVAL;
 879         }
 880
 881         len = min((int) (ptr - logname), buflen - 1);
 882
 883         memcpy(buf, logname, len);
 884         buf[len] = '\0';
 885         return 0;
 886 }
 887
 888 void sptlrpc_conf_log_update_begin(const char *logname)
 889 {
 890         struct sptlrpc_conf *conf;
 891         char                 fsname[16];
 892
 893         if (logname2fsname(logname, fsname, sizeof(fsname)))
 894                 return;
 895
 896         mutex_lock(&sptlrpc_conf_lock);
 897
 898         conf = sptlrpc_conf_get(fsname, 0);
 899         if (conf && conf->sc_local) {
 900                 LASSERT(conf->sc_updated == 0);
 901                 sptlrpc_conf_free_rsets(conf);
 902         }
 903         conf->sc_modified = 0;
 904
 905         mutex_unlock(&sptlrpc_conf_lock);
 906 }
 907 EXPORT_SYMBOL(sptlrpc_conf_log_update_begin);
 908
 909 /**
 910  * mark a config log has been updated
 911  */
 912 void sptlrpc_conf_log_update_end(const char *logname)
 913 {
 914         struct sptlrpc_conf *conf;
 915         char                 fsname[16];
 916
 917         if (logname2fsname(logname, fsname, sizeof(fsname)))
 918                 return;
 919
 920         mutex_lock(&sptlrpc_conf_lock);
 921
 922         conf = sptlrpc_conf_get(fsname, 0);
 923         if (conf) {
 924                 /*
 925                  * if original state is not updated, make sure the
 926                  * modified counter > 0 to enforce updating local copy.
 927                  */
 928                 if (conf->sc_updated == 0)
 929                         conf->sc_modified++;
 930
 931                 conf->sc_updated = 1;
 932         }
 933
 934         mutex_unlock(&sptlrpc_conf_lock);
 935 }
 936 EXPORT_SYMBOL(sptlrpc_conf_log_update_end);
 937
 938 void sptlrpc_conf_log_start(const char *logname)
 939 {
 940         struct sptlrpc_conf *conf;
 941         char                 fsname[16];
 942
 943         if (logname2fsname(logname, fsname, sizeof(fsname)))
 944                 return;
 945
 946         mutex_lock(&sptlrpc_conf_lock);
 947         conf = sptlrpc_conf_get(fsname, 1);
 948         mutex_unlock(&sptlrpc_conf_lock);
 949 }
 950 EXPORT_SYMBOL(sptlrpc_conf_log_start);
 951
 952 void sptlrpc_conf_log_stop(const char *logname)
 953 {
 954         struct sptlrpc_conf *conf;
 955         char                 fsname[16];
 956
 957         if (logname2fsname(logname, fsname, sizeof(fsname)))
 958                 return;
 959
 960         mutex_lock(&sptlrpc_conf_lock);
 961         conf = sptlrpc_conf_get(fsname, 0);
 962         if (conf)
 963                 sptlrpc_conf_free(conf);
 964         mutex_unlock(&sptlrpc_conf_lock);
 965 }
 966 EXPORT_SYMBOL(sptlrpc_conf_log_stop);
 967
 968 static void inline flavor_set_flags(struct sptlrpc_flavor *sf,
 969                                     enum lustre_sec_part from,
 970                                     enum lustre_sec_part to,
 971                                     unsigned int fl_udesc)
 972 {
 973         if (from == LUSTRE_SP_MDT) {
 974                 /* MDT->MDT; MDT->OST */
 975                 sf->sf_flags |= PTLRPC_SEC_FL_ROOTONLY;
 976         } else if (from == LUSTRE_SP_CLI && to == LUSTRE_SP_OST) {
 977                 /* CLI->OST */
 978                 sf->sf_flags |= PTLRPC_SEC_FL_ROOTONLY | PTLRPC_SEC_FL_BULK;
 979         } else if (from == LUSTRE_SP_CLI && to == LUSTRE_SP_MDT) {
 980                 /* CLI->MDT */
 981                 if (fl_udesc && sf->sf_rpc != SPTLRPC_FLVR_NULL)
 982                         sf->sf_flags |= PTLRPC_SEC_FL_UDESC;
 983         }
 984 }
 985
 986 void sptlrpc_conf_choose_flavor(enum lustre_sec_part from,
 987                                 enum lustre_sec_part to,
 988                                 struct obd_uuid *target,
 989                                 lnet_nid_t nid,
 990                                 struct sptlrpc_flavor *sf)
 991 {
 992         struct sptlrpc_conf     *conf;
 993         struct sptlrpc_conf_tgt *conf_tgt;
 994         char                     name[MTI_NAME_MAXLEN];
 995         int                      len, rc = 0;
 996
 997         target2fsname(target->uuid, name, sizeof(name));
 998
 999         mutex_lock(&sptlrpc_conf_lock);
1000
1001         conf = sptlrpc_conf_get(name, 0);
1002         if (conf == NULL)
1003                 goto out;
1004
1005         /* convert uuid name (supposed end with _UUID) to target name */
1006         len = strlen(target->uuid);
1007         LASSERT(len > 5);
1008         memcpy(name, target->uuid, len - 5);
1009         name[len - 5] = '\0';
1010
1011         conf_tgt = sptlrpc_conf_get_tgt(conf, name, 0);
1012         if (conf_tgt) {
1013                 rc = sptlrpc_rule_set_choose(&conf_tgt->sct_rset,
1014                                              from, to, nid, sf);
1015                 if (rc)
1016                         goto out;
1017         }
1018
1019         rc = sptlrpc_rule_set_choose(&conf->sc_rset, from, to, nid, sf);
1020 out:
1021         mutex_unlock(&sptlrpc_conf_lock);
1022
1023         if (rc == 0)
1024                 get_default_flavor(sf);
1025
1026         flavor_set_flags(sf, from, to, 1);
1027 }
1028
1029 /**
1030  * called by target devices, determine the expected flavor from
1031  * certain peer (from, nid).
1032  */
1033 void sptlrpc_target_choose_flavor(struct sptlrpc_rule_set *rset,
1034                                   enum lustre_sec_part from,
1035                                   lnet_nid_t nid,
1036                                   struct sptlrpc_flavor *sf)
1037 {
1038         if (sptlrpc_rule_set_choose(rset, from, LUSTRE_SP_ANY, nid, sf) == 0)
1039                 get_default_flavor(sf);
1040 }
1041 EXPORT_SYMBOL(sptlrpc_target_choose_flavor);
1042
1043 #define SEC_ADAPT_DELAY         (10)
1044
1045 /**
1046  * called by client devices, notify the sptlrpc config has changed and
1047  * do import_sec_adapt later.
1048  */
1049 void sptlrpc_conf_client_adapt(struct obd_device *obd)
1050 {
1051         struct obd_import  *imp;
1052         ENTRY;
1053
1054         LASSERT(strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0 ||
1055                 strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME) ==0);
1056         CDEBUG(D_SEC, "obd %s\n", obd->u.cli.cl_target_uuid.uuid);
1057
1058         /* serialize with connect/disconnect import */
1059         down_read(&obd->u.cli.cl_sem);
1060
1061         imp = obd->u.cli.cl_import;
1062         if (imp) {
1063                 spin_lock(&imp->imp_lock);
1064                 if (imp->imp_sec)
1065                         imp->imp_sec_expire = cfs_time_current_sec() +
1066                                               SEC_ADAPT_DELAY;
1067                 spin_unlock(&imp->imp_lock);
1068         }
1069
1070         up_read(&obd->u.cli.cl_sem);
1071         EXIT;
1072 }
1073 EXPORT_SYMBOL(sptlrpc_conf_client_adapt);
1074
1075 #ifdef __KERNEL__
1076
1077 static void rule2string(struct sptlrpc_rule *r, char *buf, int buflen)
1078 {
1079         char    dirbuf[8];
1080         char   *net;
1081         char   *ptr = buf;
1082
1083         if (r->sr_netid == LNET_NIDNET(LNET_NID_ANY))
1084                 net = "default";
1085         else
1086                 net = libcfs_net2str(r->sr_netid);
1087
1088         if (r->sr_from == LUSTRE_SP_ANY && r->sr_to == LUSTRE_SP_ANY)
1089                 dirbuf[0] = '\0';
1090         else
1091                 snprintf(dirbuf, sizeof(dirbuf), ".%s2%s",
1092                          sptlrpc_part2name(r->sr_from),
1093                          sptlrpc_part2name(r->sr_to));
1094
1095         ptr += snprintf(buf, buflen, "srpc.flavor.%s%s=", net, dirbuf);
1096
1097         sptlrpc_flavor2name(&r->sr_flvr, ptr, buflen - (ptr - buf));
1098         buf[buflen - 1] = '\0';
1099 }
1100
1101 static int sptlrpc_record_rule_set(struct llog_handle *llh,
1102                                    char *target,
1103                                    struct sptlrpc_rule_set *rset)
1104 {
1105         struct lustre_cfg_bufs  bufs;
1106         struct lustre_cfg      *lcfg;
1107         struct llog_rec_hdr     rec;
1108         int                     buflen;
1109         char                    param[48];
1110         int                     i, rc;
1111
1112         for (i = 0; i < rset->srs_nrule; i++) {
1113                 rule2string(&rset->srs_rules[i], param, sizeof(param));
1114
1115                 lustre_cfg_bufs_reset(&bufs, NULL);
1116                 lustre_cfg_bufs_set_string(&bufs, 1, target);
1117                 lustre_cfg_bufs_set_string(&bufs, 2, param);
1118                 lcfg = lustre_cfg_new(LCFG_SPTLRPC_CONF, &bufs);
1119                 LASSERT(lcfg);
1120
1121                 buflen = lustre_cfg_len(lcfg->lcfg_bufcount,
1122                                         lcfg->lcfg_buflens);
1123                 rec.lrh_len = llog_data_len(buflen);
1124                 rec.lrh_type = OBD_CFG_REC;
1125                 rc = llog_write_rec(llh, &rec, NULL, 0, (void *)lcfg, -1);
1126                 if (rc)
1127                         CERROR("failed to write a rec: rc = %d\n", rc);
1128                 lustre_cfg_free(lcfg);
1129         }
1130         return 0;
1131 }
1132
1133 static int sptlrpc_record_rules(struct llog_handle *llh,
1134                                 struct sptlrpc_conf *conf)
1135 {
1136         struct sptlrpc_conf_tgt *conf_tgt;
1137
1138         sptlrpc_record_rule_set(llh, conf->sc_fsname, &conf->sc_rset);
1139
1140         list_for_each_entry(conf_tgt, &conf->sc_tgts, sct_list) {
1141                 sptlrpc_record_rule_set(llh, conf_tgt->sct_name,
1142                                         &conf_tgt->sct_rset);
1143         }
1144         return 0;
1145 }
1146
1147 #define LOG_SPTLRPC_TMP "sptlrpc.tmp"
1148 #define LOG_SPTLRPC     "sptlrpc"
1149
1150 static
1151 int sptlrpc_target_local_copy_conf(struct obd_device *obd,
1152                                    struct sptlrpc_conf *conf)
1153 {
1154         struct llog_handle   *llh = NULL;
1155         struct llog_ctxt     *ctxt;
1156         struct lvfs_run_ctxt  saved;
1157         struct dentry        *dentry;
1158         int                   rc;
1159         ENTRY;
1160
1161         ctxt = llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
1162         if (ctxt == NULL) {
1163                 CERROR("missing llog context\n");
1164                 RETURN(-EINVAL);
1165         }
1166
1167         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1168
1169         dentry = lookup_one_len(MOUNT_CONFIGS_DIR, current->fs->pwd,
1170                                 strlen(MOUNT_CONFIGS_DIR));
1171         if (IS_ERR(dentry)) {
1172                 rc = PTR_ERR(dentry);
1173                 CERROR("cannot lookup %s directory: rc = %d\n",
1174                        MOUNT_CONFIGS_DIR, rc);
1175                 GOTO(out_ctx, rc);
1176         }
1177
1178         /* erase the old tmp log */
1179         rc = llog_create(ctxt, &llh, NULL, LOG_SPTLRPC_TMP);
1180         if (rc == 0) {
1181                 rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
1182                 if (rc == 0) {
1183                         rc = llog_destroy(llh);
1184                         llog_free_handle(llh);
1185                 } else {
1186                         llog_close(llh);
1187                 }
1188         }
1189
1190         if (rc) {
1191                 CERROR("target %s: cannot erase temporary sptlrpc log: "
1192                        "rc = %d\n", obd->obd_name, rc);
1193                 GOTO(out_dput, rc);
1194         }
1195
1196         /* write temporary log */
1197         rc = llog_create(ctxt, &llh, NULL, LOG_SPTLRPC_TMP);
1198         if (rc)
1199                 GOTO(out_dput, rc);
1200         rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
1201         if (rc)
1202                 GOTO(out_close, rc);
1203
1204         rc = sptlrpc_record_rules(llh, conf);
1205
1206 out_close:
1207         llog_close(llh);
1208
1209         if (rc == 0) {
1210                 rc = lustre_rename(dentry, obd->obd_lvfs_ctxt.pwdmnt,
1211                                    LOG_SPTLRPC_TMP, LOG_SPTLRPC);
1212         }
1213
1214 out_dput:
1215         l_dput(dentry);
1216 out_ctx:
1217         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1218         llog_ctxt_put(ctxt);
1219         CDEBUG(D_SEC, "target %s: write local sptlrpc conf: rc = %d\n",
1220                obd->obd_name, rc);
1221         RETURN(rc);
1222 }
1223
1224 static int local_read_handler(struct llog_handle *llh,
1225                               struct llog_rec_hdr *rec,
1226                               void *data)
1227 {
1228         struct sptlrpc_conf  *conf = (struct sptlrpc_conf *) data;
1229         struct lustre_cfg    *lcfg = (struct lustre_cfg *)(rec + 1);
1230         int                   cfg_len, rc;
1231         ENTRY;
1232
1233         if (rec->lrh_type != OBD_CFG_REC) {
1234                 CERROR("unhandled lrh_type: %#x\n", rec->lrh_type);
1235                 RETURN(-EINVAL);
1236         }
1237
1238         cfg_len = rec->lrh_len - sizeof(struct llog_rec_hdr) -
1239                   sizeof(struct llog_rec_tail);
1240
1241         rc = lustre_cfg_sanity_check(lcfg, cfg_len);
1242         if (rc) {
1243                 CERROR("Insane cfg\n");
1244                 RETURN(rc);
1245         }
1246
1247         if (lcfg->lcfg_command != LCFG_SPTLRPC_CONF) {
1248                 CERROR("invalid command (%x)\n", lcfg->lcfg_command);
1249                 RETURN(-EINVAL);
1250         }
1251
1252         RETURN(__sptlrpc_process_config(lcfg, conf));
1253 }
1254
1255 static
1256 int sptlrpc_target_local_read_conf(struct obd_device *obd,
1257                                    struct sptlrpc_conf *conf)
1258 {
1259         struct llog_handle    *llh = NULL;
1260         struct llog_ctxt      *ctxt;
1261         struct lvfs_run_ctxt   saved;
1262         int                    rc;
1263         ENTRY;
1264
1265         LASSERT(conf->sc_updated == 0 && conf->sc_local == 0);
1266
1267         ctxt = llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
1268         if (ctxt == NULL) {
1269                 CERROR("missing llog context\n");
1270                 RETURN(-EINVAL);
1271         }
1272
1273         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1274
1275         rc = llog_create(ctxt, &llh, NULL, LOG_SPTLRPC);
1276         if (rc)
1277                 GOTO(out_pop, rc);
1278
1279         rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
1280         if (rc)
1281                 GOTO(out_close, rc);
1282
1283         if (llog_get_size(llh) <= 1) {
1284                 CDEBUG(D_SEC, "no local sptlrpc copy found\n");
1285                 GOTO(out_close, rc = 0);
1286         }
1287
1288         rc = llog_process(llh, local_read_handler, (void *) conf, NULL);
1289
1290         if (rc == 0) {
1291                 conf->sc_local = 1;
1292         } else {
1293                 sptlrpc_conf_free_rsets(conf);
1294         }
1295
1296 out_close:
1297         llog_close(llh);
1298 out_pop:
1299         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1300         llog_ctxt_put(ctxt);
1301         CDEBUG(D_SEC, "target %s: read local sptlrpc conf: rc = %d\n",
1302                obd->obd_name, rc);
1303         RETURN(rc);
1304 }
1305
1306 #endif /* __KRENEL__ */
1307
1308 /**
1309  * called by target devices, extract sptlrpc rules which applies to
1310  * this target, to be used for future rpc flavor checking.
1311  */
1312 int sptlrpc_conf_target_get_rules(struct obd_device *obd,
1313                                   struct sptlrpc_rule_set *rset,
1314                                   int initial)
1315 {
1316         struct sptlrpc_conf      *conf;
1317         struct sptlrpc_conf_tgt  *conf_tgt;
1318         enum lustre_sec_part      sp_dst;
1319         char                      fsname[MTI_NAME_MAXLEN];
1320         int                       rc = 0;
1321         ENTRY;
1322
1323         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDT_NAME) == 0) {
1324                 sp_dst = LUSTRE_SP_MDT;
1325         } else if (strcmp(obd->obd_type->typ_name, LUSTRE_OST_NAME) == 0) {
1326                 sp_dst = LUSTRE_SP_OST;
1327         } else {
1328                 CERROR("unexpected obd type %s\n", obd->obd_type->typ_name);
1329                 RETURN(-EINVAL);
1330         }
1331         CDEBUG(D_SEC, "get rules for target %s\n", obd->obd_uuid.uuid);
1332
1333         target2fsname(obd->obd_uuid.uuid, fsname, sizeof(fsname));
1334
1335         mutex_lock(&sptlrpc_conf_lock);
1336
1337         conf = sptlrpc_conf_get(fsname, 0);
1338         if (conf == NULL) {
1339                 CERROR("missing sptlrpc config log\n");
1340                 GOTO(out, rc);
1341         }
1342
1343 #ifdef __KERNEL__
1344         if (conf->sc_updated  == 0) {
1345                 /*
1346                  * always read from local copy. here another option is
1347                  * if we already have a local copy (read from another
1348                  * target device hosted on the same node) we simply use that.
1349                  */
1350                 if (conf->sc_local)
1351                         sptlrpc_conf_free_rsets(conf);
1352
1353                 sptlrpc_target_local_read_conf(obd, conf);
1354         } else {
1355                 LASSERT(conf->sc_local == 0);
1356
1357                 /* write a local copy */
1358                 if (initial || conf->sc_modified)
1359                         sptlrpc_target_local_copy_conf(obd, conf);
1360                 else
1361                         CDEBUG(D_SEC, "unchanged, skip updating local copy\n");
1362         }
1363 #endif
1364
1365         /* extract rule set for this target */
1366         conf_tgt = sptlrpc_conf_get_tgt(conf, obd->obd_name, 0);
1367
1368         rc = sptlrpc_rule_set_extract(&conf->sc_rset,
1369                                       conf_tgt ? &conf_tgt->sct_rset: NULL,
1370                                       LUSTRE_SP_ANY, sp_dst, rset);
1371 out:
1372         mutex_unlock(&sptlrpc_conf_lock);
1373         RETURN(rc);
1374 }
1375 EXPORT_SYMBOL(sptlrpc_conf_target_get_rules);
1376
1377 int  sptlrpc_conf_init(void)
1378 {
1379         mutex_init(&sptlrpc_conf_lock);
1380         return 0;
1381 }
1382
1383 void sptlrpc_conf_fini(void)
1384 {
1385         struct sptlrpc_conf  *conf, *conf_next;
1386
1387         mutex_lock(&sptlrpc_conf_lock);
1388         list_for_each_entry_safe(conf, conf_next, &sptlrpc_confs, sc_list) {
1389                 sptlrpc_conf_free(conf);
1390         }
1391         LASSERT(list_empty(&sptlrpc_confs));
1392         mutex_unlock(&sptlrpc_conf_lock);
1393 }