lustre/ptlrpc/sec_config.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2015, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36
  37 #define DEBUG_SUBSYSTEM S_SEC
  38
  39 #include <libcfs/libcfs.h>
  40 #include <linux/crypto.h>
  41 #include <linux/key.h>
  42
  43 #include <obd.h>
  44 #include <obd_class.h>
  45 #include <obd_support.h>
  46 #include <lustre_net.h>
  47 #include <lustre_import.h>
  48 #include <lustre_log.h>
  49 #include <lustre_disk.h>
  50 #include <lustre_dlm.h>
  51 #include <lustre_param.h>
  52 #include <lustre_sec.h>
  53
  54 #include "ptlrpc_internal.h"
  55
  56 const char *sptlrpc_part2name(enum lustre_sec_part part)
  57 {
  58         switch (part) {
  59         case LUSTRE_SP_CLI:
  60                 return "cli";
  61         case LUSTRE_SP_MDT:
  62                 return "mdt";
  63         case LUSTRE_SP_OST:
  64                 return "ost";
  65         case LUSTRE_SP_MGC:
  66                 return "mgc";
  67         case LUSTRE_SP_MGS:
  68                 return "mgs";
  69         case LUSTRE_SP_ANY:
  70                 return "any";
  71         default:
  72                 return "err";
  73         }
  74 }
  75 EXPORT_SYMBOL(sptlrpc_part2name);
  76
  77 enum lustre_sec_part sptlrpc_target_sec_part(struct obd_device *obd)
  78 {
  79         const char *type = obd->obd_type->typ_name;
  80
  81         if (!strcmp(type, LUSTRE_MDT_NAME))
  82                 return LUSTRE_SP_MDT;
  83         if (!strcmp(type, LUSTRE_OST_NAME))
  84                 return LUSTRE_SP_OST;
  85         if (!strcmp(type, LUSTRE_MGS_NAME))
  86                 return LUSTRE_SP_MGS;
  87
  88         CERROR("unknown target %p(%s)\n", obd, type);
  89         return LUSTRE_SP_ANY;
  90 }
  91
  92 /****************************************
  93  * user supplied flavor string parsing  *
  94  ****************************************/
  95
  96 /*
  97  * format: <base_flavor>[-<bulk_type:alg_spec>]
  98  */
  99 int sptlrpc_parse_flavor(const char *str, struct sptlrpc_flavor *flvr)
 100 {
 101         char            buf[32];
 102         char           *bulk, *alg;
 103
 104         memset(flvr, 0, sizeof(*flvr));
 105
 106         if (str == NULL || str[0] == '\0') {
 107                 flvr->sf_rpc = SPTLRPC_FLVR_INVALID;
 108                 return 0;
 109         }
 110
 111         strlcpy(buf, str, sizeof(buf));
 112
 113         bulk = strchr(buf, '-');
 114         if (bulk)
 115                 *bulk++ = '\0';
 116
 117         flvr->sf_rpc = sptlrpc_name2flavor_base(buf);
 118         if (flvr->sf_rpc == SPTLRPC_FLVR_INVALID)
 119                 goto err_out;
 120
 121         /*
 122          * currently only base flavor "plain" can have bulk specification.
 123          */
 124         if (flvr->sf_rpc == SPTLRPC_FLVR_PLAIN) {
 125                 flvr->u_bulk.hash.hash_alg = BULK_HASH_ALG_ADLER32;
 126                 if (bulk) {
 127                         /*
 128                          * format: plain-hash:<hash_alg>
 129                          */
 130                         alg = strchr(bulk, ':');
 131                         if (alg == NULL)
 132                                 goto err_out;
 133                         *alg++ = '\0';
 134
 135                         if (strcmp(bulk, "hash"))
 136                                 goto err_out;
 137
 138                         flvr->u_bulk.hash.hash_alg = sptlrpc_get_hash_alg(alg);
 139                         if (flvr->u_bulk.hash.hash_alg >= BULK_HASH_ALG_MAX)
 140                                 goto err_out;
 141                 }
 142
 143                 if (flvr->u_bulk.hash.hash_alg == BULK_HASH_ALG_NULL)
 144                         flvr_set_bulk_svc(&flvr->sf_rpc, SPTLRPC_BULK_SVC_NULL);
 145                 else
 146                         flvr_set_bulk_svc(&flvr->sf_rpc, SPTLRPC_BULK_SVC_INTG);
 147         } else {
 148                 if (bulk)
 149                         goto err_out;
 150         }
 151
 152         flvr->sf_flags = 0;
 153         return 0;
 154
 155 err_out:
 156         CERROR("invalid flavor string: %s\n", str);
 157         return -EINVAL;
 158 }
 159 EXPORT_SYMBOL(sptlrpc_parse_flavor);
 160
 161 /****************************************
 162  * configure rules                      *
 163  ****************************************/
 164
 165 static void get_default_flavor(struct sptlrpc_flavor *sf)
 166 {
 167         memset(sf, 0, sizeof(*sf));
 168
 169         sf->sf_rpc = SPTLRPC_FLVR_NULL;
 170         sf->sf_flags = 0;
 171 }
 172
 173 static void sptlrpc_rule_init(struct sptlrpc_rule *rule)
 174 {
 175         rule->sr_netid = LNET_NIDNET(LNET_NID_ANY);
 176         rule->sr_from = LUSTRE_SP_ANY;
 177         rule->sr_to = LUSTRE_SP_ANY;
 178         rule->sr_padding = 0;
 179
 180         get_default_flavor(&rule->sr_flvr);
 181 }
 182
 183 /*
 184  * format: network[.direction]=flavor
 185  */
 186 int sptlrpc_parse_rule(char *param, struct sptlrpc_rule *rule)
 187 {
 188         char           *flavor, *dir;
 189         int             rc;
 190
 191         sptlrpc_rule_init(rule);
 192
 193         flavor = strchr(param, '=');
 194         if (flavor == NULL) {
 195                 CERROR("invalid param, no '='\n");
 196                 RETURN(-EINVAL);
 197         }
 198         *flavor++ = '\0';
 199
 200         dir = strchr(param, '.');
 201         if (dir)
 202                 *dir++ = '\0';
 203
 204         /* 1.1 network */
 205         if (strcmp(param, "default")) {
 206                 rule->sr_netid = libcfs_str2net(param);
 207                 if (rule->sr_netid == LNET_NIDNET(LNET_NID_ANY)) {
 208                         CERROR("invalid network name: %s\n", param);
 209                         RETURN(-EINVAL);
 210                 }
 211         }
 212
 213         /* 1.2 direction */
 214         if (dir) {
 215                 if (!strcmp(dir, "mdt2ost")) {
 216                         rule->sr_from = LUSTRE_SP_MDT;
 217                         rule->sr_to = LUSTRE_SP_OST;
 218                 } else if (!strcmp(dir, "mdt2mdt")) {
 219                         rule->sr_from = LUSTRE_SP_MDT;
 220                         rule->sr_to = LUSTRE_SP_MDT;
 221                 } else if (!strcmp(dir, "cli2ost")) {
 222                         rule->sr_from = LUSTRE_SP_CLI;
 223                         rule->sr_to = LUSTRE_SP_OST;
 224                 } else if (!strcmp(dir, "cli2mdt")) {
 225                         rule->sr_from = LUSTRE_SP_CLI;
 226                         rule->sr_to = LUSTRE_SP_MDT;
 227                 } else {
 228                         CERROR("invalid rule dir segment: %s\n", dir);
 229                         RETURN(-EINVAL);
 230                 }
 231         }
 232
 233         /* 2.1 flavor */
 234         rc = sptlrpc_parse_flavor(flavor, &rule->sr_flvr);
 235         if (rc)
 236                 RETURN(-EINVAL);
 237
 238         RETURN(0);
 239 }
 240 EXPORT_SYMBOL(sptlrpc_parse_rule);
 241
 242 void sptlrpc_rule_set_free(struct sptlrpc_rule_set *rset)
 243 {
 244         LASSERT(rset->srs_nslot ||
 245                 (rset->srs_nrule == 0 && rset->srs_rules == NULL));
 246
 247         if (rset->srs_nslot) {
 248                 OBD_FREE(rset->srs_rules,
 249                          rset->srs_nslot * sizeof(*rset->srs_rules));
 250                 sptlrpc_rule_set_init(rset);
 251         }
 252 }
 253 EXPORT_SYMBOL(sptlrpc_rule_set_free);
 254
 255 /*
 256  * return 0 if the rule set could accomodate one more rule.
 257  */
 258 int sptlrpc_rule_set_expand(struct sptlrpc_rule_set *rset)
 259 {
 260         struct sptlrpc_rule *rules;
 261         int nslot;
 262
 263         might_sleep();
 264
 265         if (rset->srs_nrule < rset->srs_nslot)
 266                 return 0;
 267
 268         nslot = rset->srs_nslot + 8;
 269
 270         /* better use realloc() if available */
 271         OBD_ALLOC(rules, nslot * sizeof(*rset->srs_rules));
 272         if (rules == NULL)
 273                 return -ENOMEM;
 274
 275         if (rset->srs_nrule) {
 276                 LASSERT(rset->srs_nslot && rset->srs_rules);
 277                 memcpy(rules, rset->srs_rules,
 278                        rset->srs_nrule * sizeof(*rset->srs_rules));
 279
 280                 OBD_FREE(rset->srs_rules,
 281                          rset->srs_nslot * sizeof(*rset->srs_rules));
 282         }
 283
 284         rset->srs_rules = rules;
 285         rset->srs_nslot = nslot;
 286         return 0;
 287 }
 288
 289 static inline int rule_spec_dir(struct sptlrpc_rule *rule)
 290 {
 291         return (rule->sr_from != LUSTRE_SP_ANY ||
 292                 rule->sr_to != LUSTRE_SP_ANY);
 293 }
 294 static inline int rule_spec_net(struct sptlrpc_rule *rule)
 295 {
 296         return (rule->sr_netid != LNET_NIDNET(LNET_NID_ANY));
 297 }
 298 static inline int rule_match_dir(struct sptlrpc_rule *r1,
 299                                  struct sptlrpc_rule *r2)
 300 {
 301         return (r1->sr_from == r2->sr_from && r1->sr_to == r2->sr_to);
 302 }
 303 static inline int rule_match_net(struct sptlrpc_rule *r1,
 304                                  struct sptlrpc_rule *r2)
 305 {
 306         return (r1->sr_netid == r2->sr_netid);
 307 }
 308
 309 /*
 310  * merge @rule into @rset.
 311  * the @rset slots might be expanded.
 312  */
 313 int sptlrpc_rule_set_merge(struct sptlrpc_rule_set *rset,
 314                            struct sptlrpc_rule *rule)
 315 {
 316         struct sptlrpc_rule      *p = rset->srs_rules;
 317         int                       spec_dir, spec_net;
 318         int                       rc, n, match = 0;
 319
 320         might_sleep();
 321
 322         spec_net = rule_spec_net(rule);
 323         spec_dir = rule_spec_dir(rule);
 324
 325         for (n = 0; n < rset->srs_nrule; n++) {
 326                 p = &rset->srs_rules[n];
 327
 328                 /* test network match, if failed:
 329                  * - spec rule: skip rules which is also spec rule match, until
 330                  *   we hit a wild rule, which means no more chance
 331                  * - wild rule: skip until reach the one which is also wild
 332                  *   and matches
 333                  */
 334                 if (!rule_match_net(p, rule)) {
 335                         if (spec_net) {
 336                                 if (rule_spec_net(p))
 337                                         continue;
 338                                 else
 339                                         break;
 340                         } else {
 341                                 continue;
 342                         }
 343                 }
 344
 345                 /* test dir match, same logic as net matching */
 346                 if (!rule_match_dir(p, rule)) {
 347                         if (spec_dir) {
 348                                 if (rule_spec_dir(p))
 349                                         continue;
 350                                 else
 351                                         break;
 352                         } else {
 353                                 continue;
 354                         }
 355                 }
 356
 357                 /* find a match */
 358                 match = 1;
 359                 break;
 360         }
 361
 362         if (match) {
 363                 LASSERT(n >= 0 && n < rset->srs_nrule);
 364
 365                 if (rule->sr_flvr.sf_rpc == SPTLRPC_FLVR_INVALID) {
 366                         /* remove this rule */
 367                         if (n < rset->srs_nrule - 1)
 368                                 memmove(&rset->srs_rules[n],
 369                                         &rset->srs_rules[n + 1],
 370                                         (rset->srs_nrule - n - 1) *
 371                                         sizeof(*rule));
 372                         rset->srs_nrule--;
 373                 } else {
 374                         /* override the rule */
 375                         memcpy(&rset->srs_rules[n], rule, sizeof(*rule));
 376                 }
 377         } else {
 378                 LASSERT(n >= 0 && n <= rset->srs_nrule);
 379
 380                 if (rule->sr_flvr.sf_rpc != SPTLRPC_FLVR_INVALID) {
 381                         rc = sptlrpc_rule_set_expand(rset);
 382                         if (rc)
 383                                 return rc;
 384
 385                         if (n < rset->srs_nrule)
 386                                 memmove(&rset->srs_rules[n + 1],
 387                                         &rset->srs_rules[n],
 388                                         (rset->srs_nrule - n) * sizeof(*rule));
 389                         memcpy(&rset->srs_rules[n], rule, sizeof(*rule));
 390                         rset->srs_nrule++;
 391                 } else {
 392                         CDEBUG(D_CONFIG, "ignore the unmatched deletion\n");
 393                 }
 394         }
 395
 396         return 0;
 397 }
 398 EXPORT_SYMBOL(sptlrpc_rule_set_merge);
 399
 400 /**
 401  * given from/to/nid, determine a matching flavor in ruleset.
 402  * return 1 if a match found, otherwise return 0.
 403  */
 404 int sptlrpc_rule_set_choose(struct sptlrpc_rule_set *rset,
 405                             enum lustre_sec_part from,
 406                             enum lustre_sec_part to,
 407                             lnet_nid_t nid,
 408                             struct sptlrpc_flavor *sf)
 409 {
 410         struct sptlrpc_rule    *r;
 411         int                     n;
 412
 413         for (n = 0; n < rset->srs_nrule; n++) {
 414                 r = &rset->srs_rules[n];
 415
 416                 if (LNET_NIDNET(nid) != LNET_NIDNET(LNET_NID_ANY) &&
 417                     r->sr_netid != LNET_NIDNET(LNET_NID_ANY) &&
 418                     LNET_NIDNET(nid) != r->sr_netid)
 419                         continue;
 420
 421                 if (from != LUSTRE_SP_ANY && r->sr_from != LUSTRE_SP_ANY &&
 422                     from != r->sr_from)
 423                         continue;
 424
 425                 if (to != LUSTRE_SP_ANY && r->sr_to != LUSTRE_SP_ANY &&
 426                     to != r->sr_to)
 427                         continue;
 428
 429                 *sf = r->sr_flvr;
 430                 return 1;
 431         }
 432
 433         return 0;
 434 }
 435
 436 void sptlrpc_rule_set_dump(struct sptlrpc_rule_set *rset)
 437 {
 438         struct sptlrpc_rule *r;
 439         int     n;
 440
 441         for (n = 0; n < rset->srs_nrule; n++) {
 442                 r = &rset->srs_rules[n];
 443                 CDEBUG(D_SEC, "<%02d> from %x to %x, net %x, rpc %x\n", n,
 444                        r->sr_from, r->sr_to, r->sr_netid, r->sr_flvr.sf_rpc);
 445         }
 446 }
 447
 448 static int sptlrpc_rule_set_extract(struct sptlrpc_rule_set *gen,
 449                                     struct sptlrpc_rule_set *tgt,
 450                                     enum lustre_sec_part from,
 451                                     enum lustre_sec_part to,
 452                                     struct sptlrpc_rule_set *rset)
 453 {
 454         struct sptlrpc_rule_set *src[2] = { gen, tgt };
 455         struct sptlrpc_rule     *rule;
 456         int                      i, n, rc;
 457
 458         might_sleep();
 459
 460         /* merge general rules firstly, then target-specific rules */
 461         for (i = 0; i < 2; i++) {
 462                 if (src[i] == NULL)
 463                         continue;
 464
 465                 for (n = 0; n < src[i]->srs_nrule; n++) {
 466                         rule = &src[i]->srs_rules[n];
 467
 468                         if (from != LUSTRE_SP_ANY &&
 469                             rule->sr_from != LUSTRE_SP_ANY &&
 470                             rule->sr_from != from)
 471                                 continue;
 472                         if (to != LUSTRE_SP_ANY &&
 473                             rule->sr_to != LUSTRE_SP_ANY &&
 474                             rule->sr_to != to)
 475                                 continue;
 476
 477                         rc = sptlrpc_rule_set_merge(rset, rule);
 478                         if (rc) {
 479                                 CERROR("can't merge: %d\n", rc);
 480                                 return rc;
 481                         }
 482                 }
 483         }
 484
 485         return 0;
 486 }
 487
 488 /**********************************
 489  * sptlrpc configuration support  *
 490  **********************************/
 491
 492 struct sptlrpc_conf_tgt {
 493         struct list_head              sct_list;
 494         char                    sct_name[MAX_OBD_NAME];
 495         struct sptlrpc_rule_set sct_rset;
 496 };
 497
 498 struct sptlrpc_conf {
 499         struct list_head        sc_list;
 500         char                    sc_fsname[MTI_NAME_MAXLEN];
 501         unsigned int            sc_modified;    /* modified during updating */
 502         unsigned int            sc_updated:1,   /* updated copy from MGS */
 503                                 sc_local:1;     /* local copy from target */
 504         struct sptlrpc_rule_set sc_rset;        /* fs general rules */
 505         struct list_head        sc_tgts;        /* target-specific rules */
 506 };
 507
 508 static struct mutex sptlrpc_conf_lock;
 509 static struct list_head sptlrpc_confs;
 510
 511 static inline int is_hex(char c)
 512 {
 513         return ((c >= '0' && c <= '9') ||
 514                 (c >= 'a' && c <= 'f'));
 515 }
 516
 517 static void target2fsname(const char *tgt, char *fsname, int buflen)
 518 {
 519         const char     *ptr;
 520         int             len;
 521
 522         ptr = strrchr(tgt, '-');
 523         if (ptr) {
 524                 if ((strncmp(ptr, "-MDT", 4) != 0 &&
 525                      strncmp(ptr, "-OST", 4) != 0) ||
 526                     !is_hex(ptr[4]) || !is_hex(ptr[5]) ||
 527                     !is_hex(ptr[6]) || !is_hex(ptr[7]))
 528                         ptr = NULL;
 529         }
 530
 531         /* if we didn't find the pattern, treat the whole string as fsname */
 532         if (ptr == NULL)
 533                 len = strlen(tgt);
 534         else
 535                 len = ptr - tgt;
 536
 537         len = min(len, buflen - 1);
 538         memcpy(fsname, tgt, len);
 539         fsname[len] = '\0';
 540 }
 541
 542 static void sptlrpc_conf_free_rsets(struct sptlrpc_conf *conf)
 543 {
 544         struct sptlrpc_conf_tgt *conf_tgt, *conf_tgt_next;
 545
 546         sptlrpc_rule_set_free(&conf->sc_rset);
 547
 548         list_for_each_entry_safe(conf_tgt, conf_tgt_next,
 549                                  &conf->sc_tgts, sct_list) {
 550                 sptlrpc_rule_set_free(&conf_tgt->sct_rset);
 551                 list_del(&conf_tgt->sct_list);
 552                 OBD_FREE_PTR(conf_tgt);
 553         }
 554         LASSERT(list_empty(&conf->sc_tgts));
 555
 556         conf->sc_updated = 0;
 557         conf->sc_local = 0;
 558 }
 559
 560 static void sptlrpc_conf_free(struct sptlrpc_conf *conf)
 561 {
 562         CDEBUG(D_SEC, "free sptlrpc conf %s\n", conf->sc_fsname);
 563
 564         sptlrpc_conf_free_rsets(conf);
 565         list_del(&conf->sc_list);
 566         OBD_FREE_PTR(conf);
 567 }
 568
 569 static
 570 struct sptlrpc_conf_tgt *sptlrpc_conf_get_tgt(struct sptlrpc_conf *conf,
 571                                               const char *name,
 572                                               int create)
 573 {
 574         struct sptlrpc_conf_tgt *conf_tgt;
 575
 576         list_for_each_entry(conf_tgt, &conf->sc_tgts, sct_list) {
 577                 if (strcmp(conf_tgt->sct_name, name) == 0)
 578                         return conf_tgt;
 579         }
 580
 581         if (!create)
 582                 return NULL;
 583
 584         OBD_ALLOC_PTR(conf_tgt);
 585         if (conf_tgt) {
 586                 strlcpy(conf_tgt->sct_name, name, sizeof(conf_tgt->sct_name));
 587                 sptlrpc_rule_set_init(&conf_tgt->sct_rset);
 588                 list_add(&conf_tgt->sct_list, &conf->sc_tgts);
 589         }
 590
 591         return conf_tgt;
 592 }
 593
 594 static
 595 struct sptlrpc_conf *sptlrpc_conf_get(const char *fsname,
 596                                       int create)
 597 {
 598         struct sptlrpc_conf *conf;
 599
 600         list_for_each_entry(conf, &sptlrpc_confs, sc_list) {
 601                 if (strcmp(conf->sc_fsname, fsname) == 0)
 602                         return conf;
 603         }
 604
 605         if (!create)
 606                 return NULL;
 607
 608         OBD_ALLOC_PTR(conf);
 609         if (conf == NULL)
 610                 return NULL;
 611
 612         if (strlcpy(conf->sc_fsname, fsname, sizeof(conf->sc_fsname)) >=
 613             sizeof(conf->sc_fsname)) {
 614                 OBD_FREE_PTR(conf);
 615                 return NULL;
 616         }
 617         sptlrpc_rule_set_init(&conf->sc_rset);
 618         INIT_LIST_HEAD(&conf->sc_tgts);
 619         list_add(&conf->sc_list, &sptlrpc_confs);
 620
 621         CDEBUG(D_SEC, "create sptlrpc conf %s\n", conf->sc_fsname);
 622         return conf;
 623 }
 624
 625 /**
 626  * caller must hold conf_lock already.
 627  */
 628 static int sptlrpc_conf_merge_rule(struct sptlrpc_conf *conf,
 629                                    const char *target,
 630                                    struct sptlrpc_rule *rule)
 631 {
 632         struct sptlrpc_conf_tgt  *conf_tgt;
 633         struct sptlrpc_rule_set  *rule_set;
 634
 635         /* fsname == target means general rules for the whole fs */
 636         if (strcmp(conf->sc_fsname, target) == 0) {
 637                 rule_set = &conf->sc_rset;
 638         } else {
 639                 conf_tgt = sptlrpc_conf_get_tgt(conf, target, 1);
 640                 if (conf_tgt) {
 641                         rule_set = &conf_tgt->sct_rset;
 642                 } else {
 643                         CERROR("out of memory, can't merge rule!\n");
 644                         return -ENOMEM;
 645                 }
 646         }
 647
 648         return sptlrpc_rule_set_merge(rule_set, rule);
 649 }
 650
 651 /**
 652  * process one LCFG_SPTLRPC_CONF record. if \a conf is NULL, we
 653  * find one through the target name in the record inside conf_lock;
 654  * otherwise means caller already hold conf_lock.
 655  */
 656 static int __sptlrpc_process_config(struct lustre_cfg *lcfg,
 657                                     struct sptlrpc_conf *conf)
 658 {
 659         char                   *target, *param;
 660         char                    fsname[MTI_NAME_MAXLEN];
 661         struct sptlrpc_rule     rule;
 662         int                     rc;
 663         ENTRY;
 664
 665         target = lustre_cfg_string(lcfg, 1);
 666         if (target == NULL) {
 667                 CERROR("missing target name\n");
 668                 RETURN(-EINVAL);
 669         }
 670
 671         param = lustre_cfg_string(lcfg, 2);
 672         if (param == NULL) {
 673                 CERROR("missing parameter\n");
 674                 RETURN(-EINVAL);
 675         }
 676
 677         CDEBUG(D_SEC, "processing rule: %s.%s\n", target, param);
 678
 679         /* parse rule to make sure the format is correct */
 680         if (strncmp(param, PARAM_SRPC_FLVR, sizeof(PARAM_SRPC_FLVR) - 1) != 0) {
 681                 CERROR("Invalid sptlrpc parameter: %s\n", param);
 682                 RETURN(-EINVAL);
 683         }
 684         param += sizeof(PARAM_SRPC_FLVR) - 1;
 685
 686         rc = sptlrpc_parse_rule(param, &rule);
 687         if (rc)
 688                 RETURN(-EINVAL);
 689
 690         if (conf == NULL) {
 691                 target2fsname(target, fsname, sizeof(fsname));
 692
 693                 mutex_lock(&sptlrpc_conf_lock);
 694                 conf = sptlrpc_conf_get(fsname, 0);
 695                 if (conf == NULL) {
 696                         CERROR("can't find conf\n");
 697                         rc = -ENOMEM;
 698                 } else {
 699                         rc = sptlrpc_conf_merge_rule(conf, target, &rule);
 700                 }
 701                 mutex_unlock(&sptlrpc_conf_lock);
 702         } else {
 703                 LASSERT(mutex_is_locked(&sptlrpc_conf_lock));
 704                 rc = sptlrpc_conf_merge_rule(conf, target, &rule);
 705         }
 706
 707         if (rc == 0)
 708                 conf->sc_modified++;
 709
 710         RETURN(rc);
 711 }
 712
 713 int sptlrpc_process_config(struct lustre_cfg *lcfg)
 714 {
 715         return __sptlrpc_process_config(lcfg, NULL);
 716 }
 717 EXPORT_SYMBOL(sptlrpc_process_config);
 718
 719 static int logname2fsname(const char *logname, char *buf, int buflen)
 720 {
 721         char   *ptr;
 722         int     len;
 723
 724         ptr = strrchr(logname, '-');
 725         if (ptr == NULL || strcmp(ptr, "-sptlrpc")) {
 726                 CERROR("%s is not a sptlrpc config log\n", logname);
 727                 return -EINVAL;
 728         }
 729
 730         len = min((int) (ptr - logname), buflen - 1);
 731
 732         memcpy(buf, logname, len);
 733         buf[len] = '\0';
 734         return 0;
 735 }
 736
 737 void sptlrpc_conf_log_update_begin(const char *logname)
 738 {
 739         struct sptlrpc_conf *conf;
 740         char                 fsname[16];
 741
 742         if (logname2fsname(logname, fsname, sizeof(fsname)))
 743                 return;
 744
 745         mutex_lock(&sptlrpc_conf_lock);
 746
 747         conf = sptlrpc_conf_get(fsname, 0);
 748         if (conf) {
 749                 if (conf->sc_local) {
 750                         LASSERT(conf->sc_updated == 0);
 751                         sptlrpc_conf_free_rsets(conf);
 752                 }
 753                 conf->sc_modified = 0;
 754         }
 755
 756         mutex_unlock(&sptlrpc_conf_lock);
 757 }
 758 EXPORT_SYMBOL(sptlrpc_conf_log_update_begin);
 759
 760 /**
 761  * mark a config log has been updated
 762  */
 763 void sptlrpc_conf_log_update_end(const char *logname)
 764 {
 765         struct sptlrpc_conf *conf;
 766         char                 fsname[16];
 767
 768         if (logname2fsname(logname, fsname, sizeof(fsname)))
 769                 return;
 770
 771         mutex_lock(&sptlrpc_conf_lock);
 772
 773         conf = sptlrpc_conf_get(fsname, 0);
 774         if (conf) {
 775                 /*
 776                  * if original state is not updated, make sure the
 777                  * modified counter > 0 to enforce updating local copy.
 778                  */
 779                 if (conf->sc_updated == 0)
 780                         conf->sc_modified++;
 781
 782                 conf->sc_updated = 1;
 783         }
 784
 785         mutex_unlock(&sptlrpc_conf_lock);
 786 }
 787 EXPORT_SYMBOL(sptlrpc_conf_log_update_end);
 788
 789 void sptlrpc_conf_log_start(const char *logname)
 790 {
 791         char                 fsname[16];
 792
 793         if (logname2fsname(logname, fsname, sizeof(fsname)))
 794                 return;
 795
 796         mutex_lock(&sptlrpc_conf_lock);
 797         sptlrpc_conf_get(fsname, 1);
 798         mutex_unlock(&sptlrpc_conf_lock);
 799 }
 800 EXPORT_SYMBOL(sptlrpc_conf_log_start);
 801
 802 void sptlrpc_conf_log_stop(const char *logname)
 803 {
 804         struct sptlrpc_conf *conf;
 805         char                 fsname[16];
 806
 807         if (logname2fsname(logname, fsname, sizeof(fsname)))
 808                 return;
 809
 810         mutex_lock(&sptlrpc_conf_lock);
 811         conf = sptlrpc_conf_get(fsname, 0);
 812         if (conf)
 813                 sptlrpc_conf_free(conf);
 814         mutex_unlock(&sptlrpc_conf_lock);
 815 }
 816 EXPORT_SYMBOL(sptlrpc_conf_log_stop);
 817
 818 static void inline flavor_set_flags(struct sptlrpc_flavor *sf,
 819                                     enum lustre_sec_part from,
 820                                     enum lustre_sec_part to,
 821                                     unsigned int fl_udesc)
 822 {
 823         /*
 824          * null flavor doesn't need to set any flavor, and in fact
 825          * we'd better not do that because everybody share a single sec.
 826          */
 827         if (sf->sf_rpc == SPTLRPC_FLVR_NULL)
 828                 return;
 829
 830         if (from == LUSTRE_SP_MDT) {
 831                 /* MDT->MDT; MDT->OST */
 832                 sf->sf_flags |= PTLRPC_SEC_FL_ROOTONLY;
 833         } else if (from == LUSTRE_SP_CLI && to == LUSTRE_SP_OST) {
 834                 /* CLI->OST */
 835                 sf->sf_flags |= PTLRPC_SEC_FL_ROOTONLY | PTLRPC_SEC_FL_BULK;
 836         } else if (from == LUSTRE_SP_CLI && to == LUSTRE_SP_MDT) {
 837                 /* CLI->MDT */
 838                 if (fl_udesc && sf->sf_rpc != SPTLRPC_FLVR_NULL)
 839                         sf->sf_flags |= PTLRPC_SEC_FL_UDESC;
 840         }
 841
 842         /* Some flavors use a single uid (0) context */
 843         if (flvr_is_rootonly(sf->sf_rpc))
 844                 sf->sf_flags |= PTLRPC_SEC_FL_ROOTONLY;
 845
 846         /* User descriptor might need to be cleared */
 847         if (flvr_allows_user_desc(sf->sf_rpc) == 0)
 848                 sf->sf_flags &= ~PTLRPC_SEC_FL_UDESC;
 849 }
 850
 851 void sptlrpc_conf_choose_flavor(enum lustre_sec_part from,
 852                                 enum lustre_sec_part to,
 853                                 struct obd_uuid *target,
 854                                 lnet_nid_t nid,
 855                                 struct sptlrpc_flavor *sf)
 856 {
 857         struct sptlrpc_conf     *conf;
 858         struct sptlrpc_conf_tgt *conf_tgt;
 859         char                     name[MTI_NAME_MAXLEN];
 860         int                      len, rc = 0;
 861
 862         target2fsname(target->uuid, name, sizeof(name));
 863
 864         mutex_lock(&sptlrpc_conf_lock);
 865
 866         conf = sptlrpc_conf_get(name, 0);
 867         if (conf == NULL)
 868                 goto out;
 869
 870         /* convert uuid name (supposed end with _UUID) to target name */
 871         len = strlen(target->uuid);
 872         LASSERT(len > 5);
 873         memcpy(name, target->uuid, len - 5);
 874         name[len - 5] = '\0';
 875
 876         conf_tgt = sptlrpc_conf_get_tgt(conf, name, 0);
 877         if (conf_tgt) {
 878                 rc = sptlrpc_rule_set_choose(&conf_tgt->sct_rset,
 879                                              from, to, nid, sf);
 880                 if (rc)
 881                         goto out;
 882         }
 883
 884         rc = sptlrpc_rule_set_choose(&conf->sc_rset, from, to, nid, sf);
 885 out:
 886         mutex_unlock(&sptlrpc_conf_lock);
 887
 888         if (rc == 0)
 889                 get_default_flavor(sf);
 890
 891         flavor_set_flags(sf, from, to, 1);
 892 }
 893
 894 /**
 895  * called by target devices, determine the expected flavor from
 896  * certain peer (from, nid).
 897  */
 898 void sptlrpc_target_choose_flavor(struct sptlrpc_rule_set *rset,
 899                                   enum lustre_sec_part from,
 900                                   lnet_nid_t nid,
 901                                   struct sptlrpc_flavor *sf)
 902 {
 903         if (sptlrpc_rule_set_choose(rset, from, LUSTRE_SP_ANY, nid, sf) == 0)
 904                 get_default_flavor(sf);
 905 }
 906
 907 #define SEC_ADAPT_DELAY         (10)
 908
 909 /**
 910  * called by client devices, notify the sptlrpc config has changed and
 911  * do import_sec_adapt later.
 912  */
 913 void sptlrpc_conf_client_adapt(struct obd_device *obd)
 914 {
 915         struct obd_import  *imp;
 916         ENTRY;
 917
 918         LASSERT(strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0 ||
 919                 strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME) == 0 ||
 920                 strcmp(obd->obd_type->typ_name, LUSTRE_OSP_NAME) == 0 ||
 921                 strcmp(obd->obd_type->typ_name, LUSTRE_LWP_NAME) == 0);
 922         CDEBUG(D_SEC, "obd %s\n", obd->u.cli.cl_target_uuid.uuid);
 923
 924         /* serialize with connect/disconnect import */
 925         down_read(&obd->u.cli.cl_sem);
 926
 927         imp = obd->u.cli.cl_import;
 928         if (imp) {
 929                 spin_lock(&imp->imp_lock);
 930                 if (imp->imp_sec)
 931                         imp->imp_sec_expire = cfs_time_current_sec() +
 932                                 SEC_ADAPT_DELAY;
 933                 spin_unlock(&imp->imp_lock);
 934         }
 935
 936         up_read(&obd->u.cli.cl_sem);
 937         EXIT;
 938 }
 939 EXPORT_SYMBOL(sptlrpc_conf_client_adapt);
 940
 941
 942 static void rule2string(struct sptlrpc_rule *r, char *buf, int buflen)
 943 {
 944         char     dirbuf[8];
 945         char     net[LNET_NIDSTR_SIZE] = "default";
 946         char    *ptr = buf;
 947
 948         if (r->sr_netid != LNET_NIDNET(LNET_NID_ANY))
 949                 libcfs_net2str_r(r->sr_netid, net, sizeof(net));
 950
 951         if (r->sr_from == LUSTRE_SP_ANY && r->sr_to == LUSTRE_SP_ANY)
 952                 dirbuf[0] = '\0';
 953         else
 954                 snprintf(dirbuf, sizeof(dirbuf), ".%s2%s",
 955                          sptlrpc_part2name(r->sr_from),
 956                          sptlrpc_part2name(r->sr_to));
 957
 958         ptr += snprintf(buf, buflen, "srpc.flavor.%s%s=", net, dirbuf);
 959
 960         sptlrpc_flavor2name(&r->sr_flvr, ptr, buflen - (ptr - buf));
 961         buf[buflen - 1] = '\0';
 962 }
 963
 964 static int sptlrpc_record_rule_set(struct llog_handle *llh,
 965                                    char *target,
 966                                    struct sptlrpc_rule_set *rset)
 967 {
 968         struct llog_cfg_rec     *lcr;
 969         struct lustre_cfg_bufs   bufs;
 970         char                     param[48];
 971         int                      i, rc;
 972
 973         for (i = 0; i < rset->srs_nrule; i++) {
 974                 rule2string(&rset->srs_rules[i], param, sizeof(param));
 975
 976                 lustre_cfg_bufs_reset(&bufs, NULL);
 977                 lustre_cfg_bufs_set_string(&bufs, 1, target);
 978                 lustre_cfg_bufs_set_string(&bufs, 2, param);
 979                 lcr = lustre_cfg_rec_new(LCFG_SPTLRPC_CONF, &bufs);
 980                 if (lcr == NULL)
 981                         return -ENOMEM;
 982                 rc = llog_write(NULL, llh, &lcr->lcr_hdr, LLOG_NEXT_IDX);
 983                 lustre_cfg_rec_free(lcr);
 984                 if (rc)
 985                         return rc;
 986         }
 987         return 0;
 988 }
 989
 990 static int sptlrpc_record_rules(struct llog_handle *llh,
 991                                 struct sptlrpc_conf *conf)
 992 {
 993         struct sptlrpc_conf_tgt *conf_tgt;
 994
 995         sptlrpc_record_rule_set(llh, conf->sc_fsname, &conf->sc_rset);
 996
 997         list_for_each_entry(conf_tgt, &conf->sc_tgts, sct_list) {
 998                 sptlrpc_record_rule_set(llh, conf_tgt->sct_name,
 999                                         &conf_tgt->sct_rset);
1000         }
1001         return 0;
1002 }
1003
1004 #define LOG_SPTLRPC_TMP "sptlrpc.tmp"
1005 #define LOG_SPTLRPC     "sptlrpc"
1006
1007 static
1008 int sptlrpc_target_local_copy_conf(struct obd_device *obd,
1009                                    struct sptlrpc_conf *conf)
1010 {
1011         struct llog_handle   *llh = NULL;
1012         struct llog_ctxt     *ctxt;
1013         struct lvfs_run_ctxt  saved;
1014         struct dentry        *dentry;
1015         int                   rc;
1016         ENTRY;
1017
1018         ctxt = llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
1019         if (ctxt == NULL)
1020                 RETURN(-EINVAL);
1021
1022         push_ctxt(&saved, &obd->obd_lvfs_ctxt);
1023
1024         dentry = ll_lookup_one_len(MOUNT_CONFIGS_DIR, current->fs->pwd.dentry,
1025                                    strlen(MOUNT_CONFIGS_DIR));
1026         if (IS_ERR(dentry)) {
1027                 rc = PTR_ERR(dentry);
1028                 CERROR("cannot lookup %s directory: rc = %d\n",
1029                        MOUNT_CONFIGS_DIR, rc);
1030                 GOTO(out_ctx, rc);
1031         }
1032
1033         /* erase the old tmp log */
1034         rc = llog_erase(NULL, ctxt, NULL, LOG_SPTLRPC_TMP);
1035         if (rc < 0 && rc != -ENOENT) {
1036                 CERROR("%s: cannot erase temporary sptlrpc log: rc = %d\n",
1037                        obd->obd_name, rc);
1038                 GOTO(out_dput, rc);
1039         }
1040
1041         /* write temporary log */
1042         rc = llog_open_create(NULL, ctxt, &llh, NULL, LOG_SPTLRPC_TMP);
1043         if (rc)
1044                 GOTO(out_dput, rc);
1045         rc = llog_init_handle(NULL, llh, LLOG_F_IS_PLAIN, NULL);
1046         if (rc)
1047                 GOTO(out_close, rc);
1048
1049         rc = sptlrpc_record_rules(llh, conf);
1050
1051 out_close:
1052         llog_close(NULL, llh);
1053         if (rc == 0)
1054                 rc = lustre_rename(dentry, obd->obd_lvfs_ctxt.pwdmnt,
1055                                    LOG_SPTLRPC_TMP, LOG_SPTLRPC);
1056 out_dput:
1057         dput(dentry);
1058 out_ctx:
1059         pop_ctxt(&saved, &obd->obd_lvfs_ctxt);
1060         llog_ctxt_put(ctxt);
1061         CDEBUG(D_SEC, "target %s: write local sptlrpc conf: rc = %d\n",
1062                 obd->obd_name, rc);
1063         RETURN(rc);
1064 }
1065
1066 static int local_read_handler(const struct lu_env *env,
1067                               struct llog_handle *llh,
1068                               struct llog_rec_hdr *rec, void *data)
1069 {
1070         struct sptlrpc_conf  *conf = (struct sptlrpc_conf *) data;
1071         struct lustre_cfg    *lcfg = (struct lustre_cfg *)(rec + 1);
1072         int                   cfg_len, rc;
1073         ENTRY;
1074
1075         if (rec->lrh_type != OBD_CFG_REC) {
1076                 CERROR("unhandled lrh_type: %#x\n", rec->lrh_type);
1077                 RETURN(-EINVAL);
1078         }
1079
1080         cfg_len = rec->lrh_len - sizeof(struct llog_rec_hdr) -
1081                   sizeof(struct llog_rec_tail);
1082
1083         rc = lustre_cfg_sanity_check(lcfg, cfg_len);
1084         if (rc) {
1085                 CERROR("Insane cfg\n");
1086                 RETURN(rc);
1087         }
1088
1089         if (lcfg->lcfg_command != LCFG_SPTLRPC_CONF) {
1090                 CERROR("invalid command (%x)\n", lcfg->lcfg_command);
1091                 RETURN(-EINVAL);
1092         }
1093
1094         RETURN(__sptlrpc_process_config(lcfg, conf));
1095 }
1096
1097 static
1098 int sptlrpc_target_local_read_conf(struct obd_device *obd,
1099                                    struct sptlrpc_conf *conf)
1100 {
1101         struct llog_handle    *llh = NULL;
1102         struct llog_ctxt      *ctxt;
1103         struct lvfs_run_ctxt   saved;
1104         int                    rc;
1105         ENTRY;
1106
1107         LASSERT(conf->sc_updated == 0 && conf->sc_local == 0);
1108
1109         ctxt = llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
1110         if (ctxt == NULL) {
1111                 CERROR("missing llog context\n");
1112                 RETURN(-EINVAL);
1113         }
1114
1115         push_ctxt(&saved, &obd->obd_lvfs_ctxt);
1116
1117         rc = llog_open(NULL, ctxt, &llh, NULL, LOG_SPTLRPC, LLOG_OPEN_EXISTS);
1118         if (rc < 0) {
1119                 if (rc == -ENOENT)
1120                         rc = 0;
1121                 GOTO(out_pop, rc);
1122         }
1123
1124         rc = llog_init_handle(NULL, llh, LLOG_F_IS_PLAIN, NULL);
1125         if (rc)
1126                 GOTO(out_close, rc);
1127
1128         if (llog_get_size(llh) <= 1) {
1129                 CDEBUG(D_SEC, "no local sptlrpc copy found\n");
1130                 GOTO(out_close, rc = 0);
1131         }
1132
1133         rc = llog_process(NULL, llh, local_read_handler, (void *)conf, NULL);
1134
1135         if (rc == 0) {
1136                 conf->sc_local = 1;
1137         } else {
1138                 sptlrpc_conf_free_rsets(conf);
1139         }
1140
1141 out_close:
1142         llog_close(NULL, llh);
1143 out_pop:
1144         pop_ctxt(&saved, &obd->obd_lvfs_ctxt);
1145         llog_ctxt_put(ctxt);
1146         CDEBUG(D_SEC, "target %s: read local sptlrpc conf: rc = %d\n",
1147                 obd->obd_name, rc);
1148         RETURN(rc);
1149 }
1150
1151
1152 /**
1153  * called by target devices, extract sptlrpc rules which applies to
1154  * this target, to be used for future rpc flavor checking.
1155  */
1156 int sptlrpc_conf_target_get_rules(struct obd_device *obd,
1157                                   struct sptlrpc_rule_set *rset,
1158                                   int initial)
1159 {
1160         struct sptlrpc_conf      *conf;
1161         struct sptlrpc_conf_tgt  *conf_tgt;
1162         enum lustre_sec_part      sp_dst;
1163         char                      fsname[MTI_NAME_MAXLEN];
1164         int                       rc = 0;
1165         ENTRY;
1166
1167         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDT_NAME) == 0) {
1168                 sp_dst = LUSTRE_SP_MDT;
1169         } else if (strcmp(obd->obd_type->typ_name, LUSTRE_OST_NAME) == 0) {
1170                 sp_dst = LUSTRE_SP_OST;
1171         } else {
1172                 CERROR("unexpected obd type %s\n", obd->obd_type->typ_name);
1173                 RETURN(-EINVAL);
1174         }
1175         CDEBUG(D_SEC, "get rules for target %s\n", obd->obd_uuid.uuid);
1176
1177         target2fsname(obd->obd_uuid.uuid, fsname, sizeof(fsname));
1178
1179         mutex_lock(&sptlrpc_conf_lock);
1180
1181         conf = sptlrpc_conf_get(fsname, 0);
1182         if (conf == NULL) {
1183                 CERROR("missing sptlrpc config log\n");
1184                 GOTO(out, rc);
1185         }
1186
1187         if (conf->sc_updated  == 0) {
1188                 /*
1189                  * always read from local copy. here another option is
1190                  * if we already have a local copy (read from another
1191                  * target device hosted on the same node) we simply use that.
1192                  */
1193                 if (conf->sc_local)
1194                         sptlrpc_conf_free_rsets(conf);
1195
1196                 sptlrpc_target_local_read_conf(obd, conf);
1197         } else {
1198                 LASSERT(conf->sc_local == 0);
1199
1200                 /* write a local copy */
1201                 if (initial || conf->sc_modified)
1202                         sptlrpc_target_local_copy_conf(obd, conf);
1203                 else
1204                         CDEBUG(D_SEC, "unchanged, skip updating local copy\n");
1205         }
1206
1207         /* extract rule set for this target */
1208         conf_tgt = sptlrpc_conf_get_tgt(conf, obd->obd_name, 0);
1209
1210         rc = sptlrpc_rule_set_extract(&conf->sc_rset,
1211                                       conf_tgt ? &conf_tgt->sct_rset: NULL,
1212                                       LUSTRE_SP_ANY, sp_dst, rset);
1213 out:
1214         mutex_unlock(&sptlrpc_conf_lock);
1215         RETURN(rc);
1216 }
1217
1218 int  sptlrpc_conf_init(void)
1219 {
1220         INIT_LIST_HEAD(&sptlrpc_confs);
1221         mutex_init(&sptlrpc_conf_lock);
1222         return 0;
1223 }
1224
1225 void sptlrpc_conf_fini(void)
1226 {
1227         struct sptlrpc_conf  *conf, *conf_next;
1228
1229         mutex_lock(&sptlrpc_conf_lock);
1230         list_for_each_entry_safe(conf, conf_next, &sptlrpc_confs, sc_list)
1231                 sptlrpc_conf_free(conf);
1232         LASSERT(list_empty(&sptlrpc_confs));
1233         mutex_unlock(&sptlrpc_conf_lock);
1234 }