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 int sptlrpc_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 EXPORT_SYMBOL(sptlrpc_parse_flavor);
 325
 326 /****************************************
 327  * configure rules                      *
 328  ****************************************/
 329
 330 static void sptlrpc_rule_init(struct sptlrpc_rule *rule)
 331 {
 332         rule->sr_netid = LNET_NIDNET(LNET_NID_ANY);
 333         rule->sr_from = LUSTRE_SP_ANY;
 334         rule->sr_to = LUSTRE_SP_ANY;
 335         rule->sr_padding = 0;
 336
 337         get_default_flavor(&rule->sr_flvr);
 338 }
 339
 340 /*
 341  * format: network[.direction]=flavor
 342  */
 343 int sptlrpc_parse_rule(char *param, struct sptlrpc_rule *rule)
 344 {
 345         char           *flavor, *dir;
 346         int             rc;
 347
 348         sptlrpc_rule_init(rule);
 349
 350         flavor = strchr(param, '=');
 351         if (flavor == NULL) {
 352                 CERROR("invalid param, no '='\n");
 353                 RETURN(-EINVAL);
 354         }
 355         *flavor++ = '\0';
 356
 357         dir = strchr(param, '.');
 358         if (dir)
 359                 *dir++ = '\0';
 360
 361         /* 1.1 network */
 362         if (strcmp(param, "default")) {
 363                 rule->sr_netid = libcfs_str2net(param);
 364                 if (rule->sr_netid == LNET_NIDNET(LNET_NID_ANY)) {
 365                         CERROR("invalid network name: %s\n", param);
 366                         RETURN(-EINVAL);
 367                 }
 368         }
 369
 370         /* 1.2 direction */
 371         if (dir) {
 372                 if (!strcmp(dir, "mdt2ost")) {
 373                         rule->sr_from = LUSTRE_SP_MDT;
 374                         rule->sr_to = LUSTRE_SP_OST;
 375                 } else if (!strcmp(dir, "mdt2mdt")) {
 376                         rule->sr_from = LUSTRE_SP_MDT;
 377                         rule->sr_to = LUSTRE_SP_MDT;
 378                 } else if (!strcmp(dir, "cli2ost")) {
 379                         rule->sr_from = LUSTRE_SP_CLI;
 380                         rule->sr_to = LUSTRE_SP_OST;
 381                 } else if (!strcmp(dir, "cli2mdt")) {
 382                         rule->sr_from = LUSTRE_SP_CLI;
 383                         rule->sr_to = LUSTRE_SP_MDT;
 384                 } else {
 385                         CERROR("invalid rule dir segment: %s\n", dir);
 386                         RETURN(-EINVAL);
 387                 }
 388         }
 389
 390         /* 2.1 flavor */
 391         rc = sptlrpc_parse_flavor(flavor, &rule->sr_flvr);
 392         if (rc)
 393                 RETURN(-EINVAL);
 394
 395         RETURN(0);
 396 }
 397 EXPORT_SYMBOL(sptlrpc_parse_rule);
 398
 399 void sptlrpc_rule_set_free(struct sptlrpc_rule_set *rset)
 400 {
 401         LASSERT(rset->srs_nslot ||
 402                 (rset->srs_nrule == 0 && rset->srs_rules == NULL));
 403
 404         if (rset->srs_nslot) {
 405                 OBD_FREE(rset->srs_rules,
 406                          rset->srs_nslot * sizeof(*rset->srs_rules));
 407                 sptlrpc_rule_set_init(rset);
 408         }
 409 }
 410 EXPORT_SYMBOL(sptlrpc_rule_set_free);
 411
 412 /*
 413  * return 0 if the rule set could accomodate one more rule.
 414  * if @expand != 0, the rule set might be expanded.
 415  */
 416 int sptlrpc_rule_set_expand(struct sptlrpc_rule_set *rset, int expand)
 417 {
 418         struct sptlrpc_rule *rules;
 419         int nslot;
 420
 421         if (rset->srs_nrule < rset->srs_nslot)
 422                 return 0;
 423
 424         if (expand == 0)
 425                 return -E2BIG;
 426
 427         nslot = rset->srs_nslot + 8;
 428
 429         /* better use realloc() if available */
 430         OBD_ALLOC(rules, nslot * sizeof(*rset->srs_rules));
 431         if (rules == NULL)
 432                 return -ENOMEM;
 433
 434         if (rset->srs_nrule) {
 435                 LASSERT(rset->srs_nslot && rset->srs_rules);
 436                 memcpy(rules, rset->srs_rules,
 437                        rset->srs_nrule * sizeof(*rset->srs_rules));
 438
 439                 OBD_FREE(rset->srs_rules,
 440                          rset->srs_nslot * sizeof(*rset->srs_rules));
 441         }
 442
 443         rset->srs_rules = rules;
 444         rset->srs_nslot = nslot;
 445         return 0;
 446 }
 447 EXPORT_SYMBOL(sptlrpc_rule_set_expand);
 448
 449 static inline int rule_spec_dir(struct sptlrpc_rule *rule)
 450 {
 451         return (rule->sr_from != LUSTRE_SP_ANY ||
 452                 rule->sr_to != LUSTRE_SP_ANY);
 453 }
 454 static inline int rule_spec_net(struct sptlrpc_rule *rule)
 455 {
 456         return (rule->sr_netid != LNET_NIDNET(LNET_NID_ANY));
 457 }
 458 static inline int rule_match_dir(struct sptlrpc_rule *r1,
 459                                  struct sptlrpc_rule *r2)
 460 {
 461         return (r1->sr_from == r2->sr_from && r1->sr_to == r2->sr_to);
 462 }
 463 static inline int rule_match_net(struct sptlrpc_rule *r1,
 464                                  struct sptlrpc_rule *r2)
 465 {
 466         return (r1->sr_netid == r2->sr_netid);
 467 }
 468
 469 /*
 470  * merge @rule into @rset.
 471  * if @expand != 0 then @rset slots might be expanded.
 472  */
 473 int sptlrpc_rule_set_merge(struct sptlrpc_rule_set *rset,
 474                            struct sptlrpc_rule *rule,
 475                            int expand)
 476 {
 477         struct sptlrpc_rule      *p = rset->srs_rules;
 478         int                       spec_dir, spec_net;
 479         int                       rc, n, match = 0;
 480
 481         spec_net = rule_spec_net(rule);
 482         spec_dir = rule_spec_dir(rule);
 483
 484         for (n = 0; n < rset->srs_nrule; n++) {
 485                 p = &rset->srs_rules[n];
 486
 487                 /* test network match, if failed:
 488                  * - spec rule: skip rules which is also spec rule match, until
 489                  *   we hit a wild rule, which means no more chance
 490                  * - wild rule: skip until reach the one which is also wild
 491                  *   and matches
 492                  */
 493                 if (!rule_match_net(p, rule)) {
 494                         if (spec_net) {
 495                                 if (rule_spec_net(p))
 496                                         continue;
 497                                 else
 498                                         break;
 499                         } else {
 500                                 continue;
 501                         }
 502                 }
 503
 504                 /* test dir match, same logic as net matching */
 505                 if (!rule_match_dir(p, rule)) {
 506                         if (spec_dir) {
 507                                 if (rule_spec_dir(p))
 508                                         continue;
 509                                 else
 510                                         break;
 511                         } else {
 512                                 continue;
 513                         }
 514                 }
 515
 516                 /* find a match */
 517                 match = 1;
 518                 break;
 519         }
 520
 521         if (match) {
 522                 LASSERT(n >= 0 && n < rset->srs_nrule);
 523
 524                 if (rule->sr_flvr.sf_rpc == SPTLRPC_FLVR_INVALID) {
 525                         /* remove this rule */
 526                         if (n < rset->srs_nrule - 1)
 527                                 memmove(&rset->srs_rules[n],
 528                                         &rset->srs_rules[n + 1],
 529                                         (rset->srs_nrule - n - 1) *
 530                                         sizeof(*rule));
 531                         rset->srs_nrule--;
 532                 } else {
 533                         /* override the rule */
 534                         memcpy(&rset->srs_rules[n], rule, sizeof(*rule));
 535                 }
 536         } else {
 537                 LASSERT(n >= 0 && n <= rset->srs_nrule);
 538
 539                 if (rule->sr_flvr.sf_rpc != SPTLRPC_FLVR_INVALID) {
 540                         rc = sptlrpc_rule_set_expand(rset, expand);
 541                         if (rc)
 542                                 return rc;
 543
 544                         if (n < rset->srs_nrule)
 545                                 memmove(&rset->srs_rules[n + 1],
 546                                         &rset->srs_rules[n],
 547                                         (rset->srs_nrule - n) * sizeof(*rule));
 548                         memcpy(&rset->srs_rules[n], rule, sizeof(*rule));
 549                         rset->srs_nrule++;
 550                 } else {
 551                         CDEBUG(D_CONFIG, "ignore the unmatched deletion\n");
 552                 }
 553         }
 554
 555         return 0;
 556 }
 557 EXPORT_SYMBOL(sptlrpc_rule_set_merge);
 558
 559 /**
 560  * given from/to/nid, determine a matching flavor in ruleset.
 561  * return 1 if a match found, otherwise return 0.
 562  */
 563 int sptlrpc_rule_set_choose(struct sptlrpc_rule_set *rset,
 564                             enum lustre_sec_part from,
 565                             enum lustre_sec_part to,
 566                             lnet_nid_t nid,
 567                             struct sptlrpc_flavor *sf)
 568 {
 569         struct sptlrpc_rule    *r;
 570         int                     n;
 571
 572         for (n = 0; n < rset->srs_nrule; n++) {
 573                 r = &rset->srs_rules[n];
 574
 575                 if (LNET_NIDNET(nid) != LNET_NIDNET(LNET_NID_ANY) &&
 576                     r->sr_netid != LNET_NIDNET(LNET_NID_ANY) &&
 577                     LNET_NIDNET(nid) != r->sr_netid)
 578                         continue;
 579
 580                 if (from != LUSTRE_SP_ANY && r->sr_from != LUSTRE_SP_ANY &&
 581                     from != r->sr_from)
 582                         continue;
 583
 584                 if (to != LUSTRE_SP_ANY && r->sr_to != LUSTRE_SP_ANY &&
 585                     to != r->sr_to)
 586                         continue;
 587
 588                 *sf = r->sr_flvr;
 589                 return 1;
 590         }
 591
 592         return 0;
 593 }
 594 EXPORT_SYMBOL(sptlrpc_rule_set_choose);
 595
 596 void sptlrpc_rule_set_dump(struct sptlrpc_rule_set *rset)
 597 {
 598         struct sptlrpc_rule *r;
 599         int     n;
 600
 601         for (n = 0; n < rset->srs_nrule; n++) {
 602                 r = &rset->srs_rules[n];
 603                 CWARN("<%02d> from %x to %x, net %x, rpc %x\n", n,
 604                       r->sr_from, r->sr_to, r->sr_netid, r->sr_flvr.sf_rpc);
 605         }
 606 }
 607 EXPORT_SYMBOL(sptlrpc_rule_set_dump);
 608
 609 static int sptlrpc_rule_set_extract(struct sptlrpc_rule_set *gen,
 610                                     struct sptlrpc_rule_set *tgt,
 611                                     enum lustre_sec_part from,
 612                                     enum lustre_sec_part to,
 613                                     struct sptlrpc_rule_set *rset)
 614 {
 615         struct sptlrpc_rule_set *src[2] = { gen, tgt };
 616         struct sptlrpc_rule     *rule;
 617         int                      i, n, rc;
 618
 619         /* merge general rules firstly, then target-specific rules */
 620         for (i = 0; i < 2; i++) {
 621                 if (src[i] == NULL)
 622                         continue;
 623
 624                 for (n = 0; n < src[i]->srs_nrule; n++) {
 625                         rule = &src[i]->srs_rules[n];
 626
 627                         if (from != LUSTRE_SP_ANY &&
 628                             rule->sr_from != LUSTRE_SP_ANY &&
 629                             rule->sr_from != from)
 630                                 continue;
 631                         if (to != LUSTRE_SP_ANY &&
 632                             rule->sr_to != LUSTRE_SP_ANY &&
 633                             rule->sr_to != to)
 634                                 continue;
 635
 636                         rc = sptlrpc_rule_set_merge(rset, rule, 1);
 637                         if (rc) {
 638                                 CERROR("can't merge: %d\n", rc);
 639                                 return rc;
 640                         }
 641                 }
 642         }
 643
 644         return 0;
 645 }
 646
 647 /**********************************
 648  * sptlrpc configuration support  *
 649  **********************************/
 650
 651 struct sptlrpc_conf_tgt {
 652         struct list_head        sct_list;
 653         char                    sct_name[MAX_OBD_NAME];
 654         struct sptlrpc_rule_set sct_rset;
 655 };
 656
 657 struct sptlrpc_conf {
 658         struct list_head        sc_list;
 659         char                    sc_fsname[MTI_NAME_MAXLEN];
 660         unsigned int            sc_modified;  /* modified during updating */
 661         unsigned int            sc_updated:1, /* updated copy from MGS */
 662                                 sc_local:1;   /* local copy from target */
 663         struct sptlrpc_rule_set sc_rset;      /* fs general rules */
 664         struct list_head        sc_tgts;      /* target-specific rules */
 665 };
 666
 667 static struct mutex sptlrpc_conf_lock;
 668 static CFS_LIST_HEAD(sptlrpc_confs);
 669
 670 static inline int is_hex(char c)
 671 {
 672         return ((c >= '0' && c <= '9') ||
 673                 (c >= 'a' && c <= 'f'));
 674 }
 675
 676 static void target2fsname(const char *tgt, char *fsname, int buflen)
 677 {
 678         const char     *ptr;
 679         int             len;
 680
 681         ptr = strrchr(tgt, '-');
 682         if (ptr) {
 683                 if ((strncmp(ptr, "-MDT", 4) != 0 &&
 684                      strncmp(ptr, "-OST", 4) != 0) ||
 685                     !is_hex(ptr[4]) || !is_hex(ptr[5]) ||
 686                     !is_hex(ptr[6]) || !is_hex(ptr[7]))
 687                         ptr = NULL;
 688         }
 689
 690         /* if we didn't find the pattern, treat the whole string as fsname */
 691         if (ptr == NULL)
 692                 len = strlen(tgt);
 693         else
 694                 len = ptr - tgt;
 695
 696         len = min(len, buflen - 1);
 697         memcpy(fsname, tgt, len);
 698         fsname[len] = '\0';
 699 }
 700
 701 static void sptlrpc_conf_free_rsets(struct sptlrpc_conf *conf)
 702 {
 703         struct sptlrpc_conf_tgt *conf_tgt, *conf_tgt_next;
 704
 705         sptlrpc_rule_set_free(&conf->sc_rset);
 706
 707         list_for_each_entry_safe(conf_tgt, conf_tgt_next,
 708                                  &conf->sc_tgts, sct_list) {
 709                 sptlrpc_rule_set_free(&conf_tgt->sct_rset);
 710                 list_del(&conf_tgt->sct_list);
 711                 OBD_FREE_PTR(conf_tgt);
 712         }
 713         LASSERT(list_empty(&conf->sc_tgts));
 714
 715         conf->sc_updated = 0;
 716         conf->sc_local = 0;
 717 }
 718
 719 static void sptlrpc_conf_free(struct sptlrpc_conf *conf)
 720 {
 721         CDEBUG(D_SEC, "free sptlrpc conf %s\n", conf->sc_fsname);
 722
 723         sptlrpc_conf_free_rsets(conf);
 724         list_del(&conf->sc_list);
 725         OBD_FREE_PTR(conf);
 726 }
 727
 728 static
 729 struct sptlrpc_conf_tgt *sptlrpc_conf_get_tgt(struct sptlrpc_conf *conf,
 730                                               const char *name,
 731                                               int create)
 732 {
 733         struct sptlrpc_conf_tgt *conf_tgt;
 734
 735         list_for_each_entry(conf_tgt, &conf->sc_tgts, sct_list) {
 736                 if (strcmp(conf_tgt->sct_name, name) == 0)
 737                         return conf_tgt;
 738         }
 739
 740         if (!create)
 741                 return NULL;
 742
 743         OBD_ALLOC_PTR(conf_tgt);
 744         if (conf_tgt) {
 745                 strncpy(conf_tgt->sct_name, name, sizeof(conf_tgt->sct_name));
 746                 sptlrpc_rule_set_init(&conf_tgt->sct_rset);
 747                 list_add(&conf_tgt->sct_list, &conf->sc_tgts);
 748         }
 749
 750         return conf_tgt;
 751 }
 752
 753 static
 754 struct sptlrpc_conf *sptlrpc_conf_get(const char *fsname,
 755                                       int create)
 756 {
 757         struct sptlrpc_conf *conf;
 758
 759         list_for_each_entry(conf, &sptlrpc_confs, sc_list) {
 760                 if (strcmp(conf->sc_fsname, fsname) == 0)
 761                         return conf;
 762         }
 763
 764         if (!create)
 765                 return NULL;
 766
 767         OBD_ALLOC_PTR(conf);
 768         if (conf == NULL)
 769                 return NULL;
 770
 771         strcpy(conf->sc_fsname, fsname);
 772         sptlrpc_rule_set_init(&conf->sc_rset);
 773         CFS_INIT_LIST_HEAD(&conf->sc_tgts);
 774         list_add(&conf->sc_list, &sptlrpc_confs);
 775
 776         CDEBUG(D_SEC, "create sptlrpc conf %s\n", conf->sc_fsname);
 777         return conf;
 778 }
 779
 780 /**
 781  * caller must hold conf_lock already.
 782  */
 783 static int sptlrpc_conf_merge_rule(struct sptlrpc_conf *conf,
 784                                    const char *target,
 785                                    struct sptlrpc_rule *rule)
 786 {
 787         struct sptlrpc_conf_tgt  *conf_tgt;
 788         struct sptlrpc_rule_set  *rule_set;
 789
 790         /* fsname == target means general rules for the whole fs */
 791         if (strcmp(conf->sc_fsname, target) == 0) {
 792                 rule_set = &conf->sc_rset;
 793         } else {
 794                 conf_tgt = sptlrpc_conf_get_tgt(conf, target, 1);
 795                 if (conf_tgt) {
 796                         rule_set = &conf_tgt->sct_rset;
 797                 } else {
 798                         CERROR("out of memory, can't merge rule!\n");
 799                         return -ENOMEM;
 800                 }
 801         }
 802
 803         return sptlrpc_rule_set_merge(rule_set, rule, 1);
 804 }
 805
 806 /**
 807  * process one LCFG_SPTLRPC_CONF record. if \a conf is NULL, we
 808  * find one through the target name in the record inside conf_lock;
 809  * otherwise means caller already hold conf_lock.
 810  */
 811 static int __sptlrpc_process_config(struct lustre_cfg *lcfg,
 812                                     struct sptlrpc_conf *conf)
 813 {
 814         char                   *target, *param;
 815         char                    fsname[MTI_NAME_MAXLEN];
 816         struct sptlrpc_rule     rule;
 817         int                     rc;
 818         ENTRY;
 819
 820         target = lustre_cfg_string(lcfg, 1);
 821         if (target == NULL) {
 822                 CERROR("missing target name\n");
 823                 RETURN(-EINVAL);
 824         }
 825
 826         param = lustre_cfg_string(lcfg, 2);
 827         if (param == NULL) {
 828                 CERROR("missing parameter\n");
 829                 RETURN(-EINVAL);
 830         }
 831
 832         CDEBUG(D_SEC, "got one rule: %s.%s\n", target, param);
 833
 834         /* parse rule to make sure the format is correct */
 835         if (strncmp(param, PARAM_SRPC_FLVR, sizeof(PARAM_SRPC_FLVR) - 1) != 0) {
 836                 CERROR("Invalid sptlrpc parameter: %s\n", param);
 837                 RETURN(-EINVAL);
 838         }
 839         param += sizeof(PARAM_SRPC_FLVR) - 1;
 840
 841         rc = sptlrpc_parse_rule(param, &rule);
 842         if (rc)
 843                 RETURN(-EINVAL);
 844
 845         if (conf == NULL) {
 846                 target2fsname(target, fsname, sizeof(fsname));
 847
 848                 mutex_lock(&sptlrpc_conf_lock);
 849                 conf = sptlrpc_conf_get(fsname, 0);
 850                 if (conf == NULL) {
 851                         CERROR("can't find conf\n");
 852                         rc = -ENOMEM;
 853                 } else {
 854                         rc = sptlrpc_conf_merge_rule(conf, target, &rule);
 855                 }
 856                 mutex_unlock(&sptlrpc_conf_lock);
 857         } else {
 858                 LASSERT(mutex_is_locked(&sptlrpc_conf_lock));
 859                 rc = sptlrpc_conf_merge_rule(conf, target, &rule);
 860         }
 861
 862         if (rc == 0)
 863                 conf->sc_modified++;
 864
 865         RETURN(rc);
 866 }
 867
 868 int sptlrpc_process_config(struct lustre_cfg *lcfg)
 869 {
 870         return __sptlrpc_process_config(lcfg, NULL);
 871 }
 872 EXPORT_SYMBOL(sptlrpc_process_config);
 873
 874 static int logname2fsname(const char *logname, char *buf, int buflen)
 875 {
 876         char   *ptr;
 877         int     len;
 878
 879         ptr = strrchr(logname, '-');
 880         if (ptr == NULL || strcmp(ptr, "-sptlrpc")) {
 881                 CERROR("%s is not a sptlrpc config log\n", logname);
 882                 return -EINVAL;
 883         }
 884
 885         len = min((int) (ptr - logname), buflen - 1);
 886
 887         memcpy(buf, logname, len);
 888         buf[len] = '\0';
 889         return 0;
 890 }
 891
 892 void sptlrpc_conf_log_update_begin(const char *logname)
 893 {
 894         struct sptlrpc_conf *conf;
 895         char                 fsname[16];
 896
 897         if (logname2fsname(logname, fsname, sizeof(fsname)))
 898                 return;
 899
 900         mutex_lock(&sptlrpc_conf_lock);
 901
 902         conf = sptlrpc_conf_get(fsname, 0);
 903         if (conf && conf->sc_local) {
 904                 LASSERT(conf->sc_updated == 0);
 905                 sptlrpc_conf_free_rsets(conf);
 906         }
 907         conf->sc_modified = 0;
 908
 909         mutex_unlock(&sptlrpc_conf_lock);
 910 }
 911 EXPORT_SYMBOL(sptlrpc_conf_log_update_begin);
 912
 913 /**
 914  * mark a config log has been updated
 915  */
 916 void sptlrpc_conf_log_update_end(const char *logname)
 917 {
 918         struct sptlrpc_conf *conf;
 919         char                 fsname[16];
 920
 921         if (logname2fsname(logname, fsname, sizeof(fsname)))
 922                 return;
 923
 924         mutex_lock(&sptlrpc_conf_lock);
 925
 926         conf = sptlrpc_conf_get(fsname, 0);
 927         if (conf) {
 928                 /*
 929                  * if original state is not updated, make sure the
 930                  * modified counter > 0 to enforce updating local copy.
 931                  */
 932                 if (conf->sc_updated == 0)
 933                         conf->sc_modified++;
 934
 935                 conf->sc_updated = 1;
 936         }
 937
 938         mutex_unlock(&sptlrpc_conf_lock);
 939 }
 940 EXPORT_SYMBOL(sptlrpc_conf_log_update_end);
 941
 942 void sptlrpc_conf_log_start(const char *logname)
 943 {
 944         struct sptlrpc_conf *conf;
 945         char                 fsname[16];
 946
 947         if (logname2fsname(logname, fsname, sizeof(fsname)))
 948                 return;
 949
 950         mutex_lock(&sptlrpc_conf_lock);
 951         conf = sptlrpc_conf_get(fsname, 1);
 952         mutex_unlock(&sptlrpc_conf_lock);
 953 }
 954 EXPORT_SYMBOL(sptlrpc_conf_log_start);
 955
 956 void sptlrpc_conf_log_stop(const char *logname)
 957 {
 958         struct sptlrpc_conf *conf;
 959         char                 fsname[16];
 960
 961         if (logname2fsname(logname, fsname, sizeof(fsname)))
 962                 return;
 963
 964         mutex_lock(&sptlrpc_conf_lock);
 965         conf = sptlrpc_conf_get(fsname, 0);
 966         if (conf)
 967                 sptlrpc_conf_free(conf);
 968         mutex_unlock(&sptlrpc_conf_lock);
 969 }
 970 EXPORT_SYMBOL(sptlrpc_conf_log_stop);
 971
 972 static void inline flavor_set_flags(struct sptlrpc_flavor *sf,
 973                                     enum lustre_sec_part from,
 974                                     enum lustre_sec_part to,
 975                                     unsigned int fl_udesc)
 976 {
 977         if (from == LUSTRE_SP_MDT) {
 978                 /* MDT->MDT; MDT->OST */
 979                 sf->sf_flags |= PTLRPC_SEC_FL_ROOTONLY;
 980         } else if (from == LUSTRE_SP_CLI && to == LUSTRE_SP_OST) {
 981                 /* CLI->OST */
 982                 sf->sf_flags |= PTLRPC_SEC_FL_ROOTONLY | PTLRPC_SEC_FL_BULK;
 983         } else if (from == LUSTRE_SP_CLI && to == LUSTRE_SP_MDT) {
 984                 /* CLI->MDT */
 985                 if (fl_udesc && sf->sf_rpc != SPTLRPC_FLVR_NULL)
 986                         sf->sf_flags |= PTLRPC_SEC_FL_UDESC;
 987         }
 988 }
 989
 990 void sptlrpc_conf_choose_flavor(enum lustre_sec_part from,
 991                                 enum lustre_sec_part to,
 992                                 struct obd_uuid *target,
 993                                 lnet_nid_t nid,
 994                                 struct sptlrpc_flavor *sf)
 995 {
 996         struct sptlrpc_conf     *conf;
 997         struct sptlrpc_conf_tgt *conf_tgt;
 998         char                     name[MTI_NAME_MAXLEN];
 999         int                      len, rc = 0;
1000
1001         target2fsname(target->uuid, name, sizeof(name));
1002
1003         mutex_lock(&sptlrpc_conf_lock);
1004
1005         conf = sptlrpc_conf_get(name, 0);
1006         if (conf == NULL)
1007                 goto out;
1008
1009         /* convert uuid name (supposed end with _UUID) to target name */
1010         len = strlen(target->uuid);
1011         LASSERT(len > 5);
1012         memcpy(name, target->uuid, len - 5);
1013         name[len - 5] = '\0';
1014
1015         conf_tgt = sptlrpc_conf_get_tgt(conf, name, 0);
1016         if (conf_tgt) {
1017                 rc = sptlrpc_rule_set_choose(&conf_tgt->sct_rset,
1018                                              from, to, nid, sf);
1019                 if (rc)
1020                         goto out;
1021         }
1022
1023         rc = sptlrpc_rule_set_choose(&conf->sc_rset, from, to, nid, sf);
1024 out:
1025         mutex_unlock(&sptlrpc_conf_lock);
1026
1027         if (rc == 0)
1028                 get_default_flavor(sf);
1029
1030         flavor_set_flags(sf, from, to, 1);
1031 }
1032
1033 /**
1034  * called by target devices, determine the expected flavor from
1035  * certain peer (from, nid).
1036  */
1037 void sptlrpc_target_choose_flavor(struct sptlrpc_rule_set *rset,
1038                                   enum lustre_sec_part from,
1039                                   lnet_nid_t nid,
1040                                   struct sptlrpc_flavor *sf)
1041 {
1042         if (sptlrpc_rule_set_choose(rset, from, LUSTRE_SP_ANY, nid, sf) == 0)
1043                 get_default_flavor(sf);
1044 }
1045 EXPORT_SYMBOL(sptlrpc_target_choose_flavor);
1046
1047 #define SEC_ADAPT_DELAY         (10)
1048
1049 /**
1050  * called by client devices, notify the sptlrpc config has changed and
1051  * do import_sec_adapt later.
1052  */
1053 void sptlrpc_conf_client_adapt(struct obd_device *obd)
1054 {
1055         struct obd_import  *imp;
1056         ENTRY;
1057
1058         LASSERT(strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0 ||
1059                 strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME) ==0);
1060         CDEBUG(D_SEC, "obd %s\n", obd->u.cli.cl_target_uuid.uuid);
1061
1062         /* serialize with connect/disconnect import */
1063         down_read(&obd->u.cli.cl_sem);
1064
1065         imp = obd->u.cli.cl_import;
1066         if (imp) {
1067                 spin_lock(&imp->imp_lock);
1068                 if (imp->imp_sec)
1069                         imp->imp_sec_expire = cfs_time_current_sec() +
1070                                               SEC_ADAPT_DELAY;
1071                 spin_unlock(&imp->imp_lock);
1072         }
1073
1074         up_read(&obd->u.cli.cl_sem);
1075         EXIT;
1076 }
1077 EXPORT_SYMBOL(sptlrpc_conf_client_adapt);
1078
1079 #ifdef __KERNEL__
1080
1081 static void rule2string(struct sptlrpc_rule *r, char *buf, int buflen)
1082 {
1083         char    dirbuf[8];
1084         char   *net;
1085         char   *ptr = buf;
1086
1087         if (r->sr_netid == LNET_NIDNET(LNET_NID_ANY))
1088                 net = "default";
1089         else
1090                 net = libcfs_net2str(r->sr_netid);
1091
1092         if (r->sr_from == LUSTRE_SP_ANY && r->sr_to == LUSTRE_SP_ANY)
1093                 dirbuf[0] = '\0';
1094         else
1095                 snprintf(dirbuf, sizeof(dirbuf), ".%s2%s",
1096                          sptlrpc_part2name(r->sr_from),
1097                          sptlrpc_part2name(r->sr_to));
1098
1099         ptr += snprintf(buf, buflen, "srpc.flavor.%s%s=", net, dirbuf);
1100
1101         sptlrpc_flavor2name(&r->sr_flvr, ptr, buflen - (ptr - buf));
1102         buf[buflen - 1] = '\0';
1103 }
1104
1105 static int sptlrpc_record_rule_set(struct llog_handle *llh,
1106                                    char *target,
1107                                    struct sptlrpc_rule_set *rset)
1108 {
1109         struct lustre_cfg_bufs  bufs;
1110         struct lustre_cfg      *lcfg;
1111         struct llog_rec_hdr     rec;
1112         int                     buflen;
1113         char                    param[48];
1114         int                     i, rc;
1115
1116         for (i = 0; i < rset->srs_nrule; i++) {
1117                 rule2string(&rset->srs_rules[i], param, sizeof(param));
1118
1119                 lustre_cfg_bufs_reset(&bufs, NULL);
1120                 lustre_cfg_bufs_set_string(&bufs, 1, target);
1121                 lustre_cfg_bufs_set_string(&bufs, 2, param);
1122                 lcfg = lustre_cfg_new(LCFG_SPTLRPC_CONF, &bufs);
1123                 LASSERT(lcfg);
1124
1125                 buflen = lustre_cfg_len(lcfg->lcfg_bufcount,
1126                                         lcfg->lcfg_buflens);
1127                 rec.lrh_len = llog_data_len(buflen);
1128                 rec.lrh_type = OBD_CFG_REC;
1129                 rc = llog_write_rec(llh, &rec, NULL, 0, (void *)lcfg, -1);
1130                 if (rc)
1131                         CERROR("failed to write a rec: rc = %d\n", rc);
1132                 lustre_cfg_free(lcfg);
1133         }
1134         return 0;
1135 }
1136
1137 static int sptlrpc_record_rules(struct llog_handle *llh,
1138                                 struct sptlrpc_conf *conf)
1139 {
1140         struct sptlrpc_conf_tgt *conf_tgt;
1141
1142         sptlrpc_record_rule_set(llh, conf->sc_fsname, &conf->sc_rset);
1143
1144         list_for_each_entry(conf_tgt, &conf->sc_tgts, sct_list) {
1145                 sptlrpc_record_rule_set(llh, conf_tgt->sct_name,
1146                                         &conf_tgt->sct_rset);
1147         }
1148         return 0;
1149 }
1150
1151 #define LOG_SPTLRPC_TMP "sptlrpc.tmp"
1152 #define LOG_SPTLRPC     "sptlrpc"
1153
1154 static
1155 int sptlrpc_target_local_copy_conf(struct obd_device *obd,
1156                                    struct sptlrpc_conf *conf)
1157 {
1158         struct llog_handle   *llh = NULL;
1159         struct llog_ctxt     *ctxt;
1160         struct lvfs_run_ctxt  saved;
1161         struct dentry        *dentry;
1162         int                   rc;
1163         ENTRY;
1164
1165         ctxt = llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
1166         if (ctxt == NULL) {
1167                 CERROR("missing llog context\n");
1168                 RETURN(-EINVAL);
1169         }
1170
1171         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1172
1173         dentry = lookup_one_len(MOUNT_CONFIGS_DIR, current->fs->pwd,
1174                                 strlen(MOUNT_CONFIGS_DIR));
1175         if (IS_ERR(dentry)) {
1176                 rc = PTR_ERR(dentry);
1177                 CERROR("cannot lookup %s directory: rc = %d\n",
1178                        MOUNT_CONFIGS_DIR, rc);
1179                 GOTO(out_ctx, rc);
1180         }
1181
1182         /* erase the old tmp log */
1183         rc = llog_create(ctxt, &llh, NULL, LOG_SPTLRPC_TMP);
1184         if (rc == 0) {
1185                 rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
1186                 if (rc == 0) {
1187                         rc = llog_destroy(llh);
1188                         llog_free_handle(llh);
1189                 } else {
1190                         llog_close(llh);
1191                 }
1192         }
1193
1194         if (rc) {
1195                 CERROR("target %s: cannot erase temporary sptlrpc log: "
1196                        "rc = %d\n", obd->obd_name, rc);
1197                 GOTO(out_dput, rc);
1198         }
1199
1200         /* write temporary log */
1201         rc = llog_create(ctxt, &llh, NULL, LOG_SPTLRPC_TMP);
1202         if (rc)
1203                 GOTO(out_dput, rc);
1204         rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
1205         if (rc)
1206                 GOTO(out_close, rc);
1207
1208         rc = sptlrpc_record_rules(llh, conf);
1209
1210 out_close:
1211         llog_close(llh);
1212
1213         if (rc == 0) {
1214                 rc = lustre_rename(dentry, obd->obd_lvfs_ctxt.pwdmnt,
1215                                    LOG_SPTLRPC_TMP, LOG_SPTLRPC);
1216         }
1217
1218 out_dput:
1219         l_dput(dentry);
1220 out_ctx:
1221         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1222         llog_ctxt_put(ctxt);
1223         CDEBUG(D_SEC, "target %s: write local sptlrpc conf: rc = %d\n",
1224                obd->obd_name, rc);
1225         RETURN(rc);
1226 }
1227
1228 static int local_read_handler(struct llog_handle *llh,
1229                               struct llog_rec_hdr *rec,
1230                               void *data)
1231 {
1232         struct sptlrpc_conf  *conf = (struct sptlrpc_conf *) data;
1233         struct lustre_cfg    *lcfg = (struct lustre_cfg *)(rec + 1);
1234         int                   cfg_len, rc;
1235         ENTRY;
1236
1237         if (rec->lrh_type != OBD_CFG_REC) {
1238                 CERROR("unhandled lrh_type: %#x\n", rec->lrh_type);
1239                 RETURN(-EINVAL);
1240         }
1241
1242         cfg_len = rec->lrh_len - sizeof(struct llog_rec_hdr) -
1243                   sizeof(struct llog_rec_tail);
1244
1245         rc = lustre_cfg_sanity_check(lcfg, cfg_len);
1246         if (rc) {
1247                 CERROR("Insane cfg\n");
1248                 RETURN(rc);
1249         }
1250
1251         if (lcfg->lcfg_command != LCFG_SPTLRPC_CONF) {
1252                 CERROR("invalid command (%x)\n", lcfg->lcfg_command);
1253                 RETURN(-EINVAL);
1254         }
1255
1256         RETURN(__sptlrpc_process_config(lcfg, conf));
1257 }
1258
1259 static
1260 int sptlrpc_target_local_read_conf(struct obd_device *obd,
1261                                    struct sptlrpc_conf *conf)
1262 {
1263         struct llog_handle    *llh = NULL;
1264         struct llog_ctxt      *ctxt;
1265         struct lvfs_run_ctxt   saved;
1266         int                    rc;
1267         ENTRY;
1268
1269         LASSERT(conf->sc_updated == 0 && conf->sc_local == 0);
1270
1271         ctxt = llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
1272         if (ctxt == NULL) {
1273                 CERROR("missing llog context\n");
1274                 RETURN(-EINVAL);
1275         }
1276
1277         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1278
1279         rc = llog_create(ctxt, &llh, NULL, LOG_SPTLRPC);
1280         if (rc)
1281                 GOTO(out_pop, rc);
1282
1283         rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
1284         if (rc)
1285                 GOTO(out_close, rc);
1286
1287         if (llog_get_size(llh) <= 1) {
1288                 CDEBUG(D_SEC, "no local sptlrpc copy found\n");
1289                 GOTO(out_close, rc = 0);
1290         }
1291
1292         rc = llog_process(llh, local_read_handler, (void *) conf, NULL);
1293
1294         if (rc == 0) {
1295                 conf->sc_local = 1;
1296         } else {
1297                 sptlrpc_conf_free_rsets(conf);
1298         }
1299
1300 out_close:
1301         llog_close(llh);
1302 out_pop:
1303         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1304         llog_ctxt_put(ctxt);
1305         CDEBUG(D_SEC, "target %s: read local sptlrpc conf: rc = %d\n",
1306                obd->obd_name, rc);
1307         RETURN(rc);
1308 }
1309
1310 #endif /* __KRENEL__ */
1311
1312 /**
1313  * called by target devices, extract sptlrpc rules which applies to
1314  * this target, to be used for future rpc flavor checking.
1315  */
1316 int sptlrpc_conf_target_get_rules(struct obd_device *obd,
1317                                   struct sptlrpc_rule_set *rset,
1318                                   int initial)
1319 {
1320         struct sptlrpc_conf      *conf;
1321         struct sptlrpc_conf_tgt  *conf_tgt;
1322         enum lustre_sec_part      sp_dst;
1323         char                      fsname[MTI_NAME_MAXLEN];
1324         int                       rc = 0;
1325         ENTRY;
1326
1327         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDT_NAME) == 0) {
1328                 sp_dst = LUSTRE_SP_MDT;
1329         } else if (strcmp(obd->obd_type->typ_name, LUSTRE_OST_NAME) == 0) {
1330                 sp_dst = LUSTRE_SP_OST;
1331         } else {
1332                 CERROR("unexpected obd type %s\n", obd->obd_type->typ_name);
1333                 RETURN(-EINVAL);
1334         }
1335         CDEBUG(D_SEC, "get rules for target %s\n", obd->obd_uuid.uuid);
1336
1337         target2fsname(obd->obd_uuid.uuid, fsname, sizeof(fsname));
1338
1339         mutex_lock(&sptlrpc_conf_lock);
1340
1341         conf = sptlrpc_conf_get(fsname, 0);
1342         if (conf == NULL) {
1343                 CERROR("missing sptlrpc config log\n");
1344                 GOTO(out, rc);
1345         }
1346
1347 #ifdef __KERNEL__
1348         if (conf->sc_updated  == 0) {
1349                 /*
1350                  * always read from local copy. here another option is
1351                  * if we already have a local copy (read from another
1352                  * target device hosted on the same node) we simply use that.
1353                  */
1354                 if (conf->sc_local)
1355                         sptlrpc_conf_free_rsets(conf);
1356
1357                 sptlrpc_target_local_read_conf(obd, conf);
1358         } else {
1359                 LASSERT(conf->sc_local == 0);
1360
1361                 /* write a local copy */
1362                 if (initial || conf->sc_modified)
1363                         sptlrpc_target_local_copy_conf(obd, conf);
1364                 else
1365                         CDEBUG(D_SEC, "unchanged, skip updating local copy\n");
1366         }
1367 #endif
1368
1369         /* extract rule set for this target */
1370         conf_tgt = sptlrpc_conf_get_tgt(conf, obd->obd_name, 0);
1371
1372         rc = sptlrpc_rule_set_extract(&conf->sc_rset,
1373                                       conf_tgt ? &conf_tgt->sct_rset: NULL,
1374                                       LUSTRE_SP_ANY, sp_dst, rset);
1375 out:
1376         mutex_unlock(&sptlrpc_conf_lock);
1377         RETURN(rc);
1378 }
1379 EXPORT_SYMBOL(sptlrpc_conf_target_get_rules);
1380
1381 int  sptlrpc_conf_init(void)
1382 {
1383         mutex_init(&sptlrpc_conf_lock);
1384         return 0;
1385 }
1386
1387 void sptlrpc_conf_fini(void)
1388 {
1389         struct sptlrpc_conf  *conf, *conf_next;
1390
1391         mutex_lock(&sptlrpc_conf_lock);
1392         list_for_each_entry_safe(conf, conf_next, &sptlrpc_confs, sc_list) {
1393                 sptlrpc_conf_free(conf);
1394         }
1395         LASSERT(list_empty(&sptlrpc_confs));
1396         mutex_unlock(&sptlrpc_conf_lock);
1397 }