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.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2017, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  */
  31
  32 #define DEBUG_SUBSYSTEM S_SEC
  33
  34 #include <libcfs/libcfs.h>
  35 #include <linux/crypto.h>
  36 #include <linux/key.h>
  37
  38 #include <obd.h>
  39 #include <obd_class.h>
  40 #include <obd_support.h>
  41 #include <lustre_net.h>
  42 #include <lustre_import.h>
  43 #include <lustre_log.h>
  44 #include <lustre_disk.h>
  45 #include <lustre_dlm.h>
  46 #include <uapi/linux/lustre/lustre_param.h>
  47 #include <lustre_sec.h>
  48
  49 #include "ptlrpc_internal.h"
  50
  51 const char *sptlrpc_part2name(enum lustre_sec_part part)
  52 {
  53         switch (part) {
  54         case LUSTRE_SP_CLI:
  55                 return "cli";
  56         case LUSTRE_SP_MDT:
  57                 return "mdt";
  58         case LUSTRE_SP_OST:
  59                 return "ost";
  60         case LUSTRE_SP_MGC:
  61                 return "mgc";
  62         case LUSTRE_SP_MGS:
  63                 return "mgs";
  64         case LUSTRE_SP_ANY:
  65                 return "any";
  66         default:
  67                 return "err";
  68         }
  69 }
  70 EXPORT_SYMBOL(sptlrpc_part2name);
  71
  72 enum lustre_sec_part sptlrpc_target_sec_part(struct obd_device *obd)
  73 {
  74         const char *type = obd->obd_type->typ_name;
  75
  76         if (!strcmp(type, LUSTRE_MDT_NAME))
  77                 return LUSTRE_SP_MDT;
  78         if (!strcmp(type, LUSTRE_OST_NAME))
  79                 return LUSTRE_SP_OST;
  80         if (!strcmp(type, LUSTRE_MGS_NAME))
  81                 return LUSTRE_SP_MGS;
  82
  83         CERROR("unknown target %p(%s)\n", obd, type);
  84         return LUSTRE_SP_ANY;
  85 }
  86
  87 /****************************************
  88  * user supplied flavor string parsing  *
  89  ****************************************/
  90
  91 /*
  92  * format: <base_flavor>[-<bulk_type:alg_spec>]
  93  */
  94 int sptlrpc_parse_flavor(const char *str, struct sptlrpc_flavor *flvr)
  95 {
  96         char            buf[32];
  97         char           *bulk, *alg;
  98
  99         memset(flvr, 0, sizeof(*flvr));
 100
 101         if (str == NULL || str[0] == '\0') {
 102                 flvr->sf_rpc = SPTLRPC_FLVR_INVALID;
 103                 return 0;
 104         }
 105
 106         strlcpy(buf, str, sizeof(buf));
 107
 108         bulk = strchr(buf, '-');
 109         if (bulk)
 110                 *bulk++ = '\0';
 111
 112         flvr->sf_rpc = sptlrpc_name2flavor_base(buf);
 113         if (flvr->sf_rpc == SPTLRPC_FLVR_INVALID)
 114                 goto err_out;
 115
 116         /*
 117          * currently only base flavor "plain" can have bulk specification.
 118          */
 119         if (flvr->sf_rpc == SPTLRPC_FLVR_PLAIN) {
 120                 flvr->u_bulk.hash.hash_alg = BULK_HASH_ALG_ADLER32;
 121                 if (bulk) {
 122                         /*
 123                          * format: plain-hash:<hash_alg>
 124                          */
 125                         alg = strchr(bulk, ':');
 126                         if (alg == NULL)
 127                                 goto err_out;
 128                         *alg++ = '\0';
 129
 130                         if (strcmp(bulk, "hash"))
 131                                 goto err_out;
 132
 133                         flvr->u_bulk.hash.hash_alg = sptlrpc_get_hash_alg(alg);
 134                         if (flvr->u_bulk.hash.hash_alg >= BULK_HASH_ALG_MAX)
 135                                 goto err_out;
 136                 }
 137
 138                 if (flvr->u_bulk.hash.hash_alg == BULK_HASH_ALG_NULL)
 139                         flvr_set_bulk_svc(&flvr->sf_rpc, SPTLRPC_BULK_SVC_NULL);
 140                 else
 141                         flvr_set_bulk_svc(&flvr->sf_rpc, SPTLRPC_BULK_SVC_INTG);
 142         } else {
 143                 if (bulk)
 144                         goto err_out;
 145         }
 146
 147         flvr->sf_flags = 0;
 148         return 0;
 149
 150 err_out:
 151         CERROR("invalid flavor string: %s\n", str);
 152         return -EINVAL;
 153 }
 154 EXPORT_SYMBOL(sptlrpc_parse_flavor);
 155
 156 /****************************************
 157  * configure rules                      *
 158  ****************************************/
 159
 160 static void get_default_flavor(struct sptlrpc_flavor *sf)
 161 {
 162         memset(sf, 0, sizeof(*sf));
 163
 164         sf->sf_rpc = SPTLRPC_FLVR_NULL;
 165         sf->sf_flags = 0;
 166 }
 167
 168 static void sptlrpc_rule_init(struct sptlrpc_rule *rule)
 169 {
 170         rule->sr_netid = LNET_NET_ANY;
 171         rule->sr_from = LUSTRE_SP_ANY;
 172         rule->sr_to = LUSTRE_SP_ANY;
 173         rule->sr_padding = 0;
 174
 175         get_default_flavor(&rule->sr_flvr);
 176 }
 177
 178 /*
 179  * format: network[.direction]=flavor
 180  */
 181 int sptlrpc_parse_rule(char *param, struct sptlrpc_rule *rule)
 182 {
 183         char *flavor, *dir;
 184         int rc;
 185
 186         sptlrpc_rule_init(rule);
 187
 188         flavor = strchr(param, '=');
 189         if (flavor == NULL) {
 190                 CERROR("invalid param, no '='\n");
 191                 RETURN(-EINVAL);
 192         }
 193         *flavor++ = '\0';
 194
 195         dir = strchr(param, '.');
 196         if (dir)
 197                 *dir++ = '\0';
 198
 199         /* 1.1 network */
 200         if (strcmp(param, "default")) {
 201                 rule->sr_netid = libcfs_str2net(param);
 202                 if (rule->sr_netid == LNET_NET_ANY) {
 203                         CERROR("invalid network name: %s\n", param);
 204                         RETURN(-EINVAL);
 205                 }
 206         }
 207
 208         /* 1.2 direction */
 209         if (dir) {
 210                 if (!strcmp(dir, "mdt2ost")) {
 211                         rule->sr_from = LUSTRE_SP_MDT;
 212                         rule->sr_to = LUSTRE_SP_OST;
 213                 } else if (!strcmp(dir, "mdt2mdt")) {
 214                         rule->sr_from = LUSTRE_SP_MDT;
 215                         rule->sr_to = LUSTRE_SP_MDT;
 216                 } else if (!strcmp(dir, "cli2ost")) {
 217                         rule->sr_from = LUSTRE_SP_CLI;
 218                         rule->sr_to = LUSTRE_SP_OST;
 219                 } else if (!strcmp(dir, "cli2mdt")) {
 220                         rule->sr_from = LUSTRE_SP_CLI;
 221                         rule->sr_to = LUSTRE_SP_MDT;
 222                 } else {
 223                         CERROR("invalid rule dir segment: %s\n", dir);
 224                         RETURN(-EINVAL);
 225                 }
 226         }
 227
 228         /* 2.1 flavor */
 229         rc = sptlrpc_parse_flavor(flavor, &rule->sr_flvr);
 230         if (rc)
 231                 RETURN(-EINVAL);
 232
 233         RETURN(0);
 234 }
 235 EXPORT_SYMBOL(sptlrpc_parse_rule);
 236
 237 void sptlrpc_rule_set_free(struct sptlrpc_rule_set *rset)
 238 {
 239         LASSERT(rset->srs_nslot ||
 240                 (rset->srs_nrule == 0 && rset->srs_rules == NULL));
 241
 242         if (rset->srs_nslot) {
 243                 OBD_FREE_PTR_ARRAY(rset->srs_rules, rset->srs_nslot);
 244                 sptlrpc_rule_set_init(rset);
 245         }
 246 }
 247 EXPORT_SYMBOL(sptlrpc_rule_set_free);
 248
 249 /*
 250  * return 0 if the rule set could accomodate one more rule.
 251  */
 252 int sptlrpc_rule_set_expand(struct sptlrpc_rule_set *rset)
 253 {
 254         struct sptlrpc_rule *rules;
 255         int nslot;
 256
 257         might_sleep();
 258
 259         if (rset->srs_nrule < rset->srs_nslot)
 260                 return 0;
 261
 262         nslot = rset->srs_nslot + 8;
 263
 264         /* better use realloc() if available */
 265         OBD_ALLOC_PTR_ARRAY(rules, nslot);
 266         if (rules == NULL)
 267                 return -ENOMEM;
 268
 269         if (rset->srs_nrule) {
 270                 LASSERT(rset->srs_nslot && rset->srs_rules);
 271                 memcpy(rules, rset->srs_rules,
 272                        rset->srs_nrule * sizeof(*rset->srs_rules));
 273
 274                 OBD_FREE_PTR_ARRAY(rset->srs_rules, rset->srs_nslot);
 275         }
 276
 277         rset->srs_rules = rules;
 278         rset->srs_nslot = nslot;
 279         return 0;
 280 }
 281
 282 static inline int rule_spec_dir(struct sptlrpc_rule *rule)
 283 {
 284         return (rule->sr_from != LUSTRE_SP_ANY ||
 285                 rule->sr_to != LUSTRE_SP_ANY);
 286 }
 287 static inline int rule_spec_net(struct sptlrpc_rule *rule)
 288 {
 289         return (rule->sr_netid != LNET_NET_ANY);
 290 }
 291 static inline int rule_match_dir(struct sptlrpc_rule *r1,
 292                                  struct sptlrpc_rule *r2)
 293 {
 294         return (r1->sr_from == r2->sr_from && r1->sr_to == r2->sr_to);
 295 }
 296 static inline int rule_match_net(struct sptlrpc_rule *r1,
 297                                  struct sptlrpc_rule *r2)
 298 {
 299         return (r1->sr_netid == r2->sr_netid);
 300 }
 301
 302 /*
 303  * merge @rule into @rset.
 304  * the @rset slots might be expanded.
 305  */
 306 int sptlrpc_rule_set_merge(struct sptlrpc_rule_set *rset,
 307                            struct sptlrpc_rule *rule)
 308 {
 309         struct sptlrpc_rule      *p = rset->srs_rules;
 310         int                       spec_dir, spec_net;
 311         int                       rc, n, match = 0;
 312
 313         might_sleep();
 314
 315         spec_net = rule_spec_net(rule);
 316         spec_dir = rule_spec_dir(rule);
 317
 318         for (n = 0; n < rset->srs_nrule; n++) {
 319                 p = &rset->srs_rules[n];
 320
 321                 /* test network match, if failed:
 322                  * - spec rule: skip rules which is also spec rule match, until
 323                  *   we hit a wild rule, which means no more chance
 324                  * - wild rule: skip until reach the one which is also wild
 325                  *   and matches
 326                  */
 327                 if (!rule_match_net(p, rule)) {
 328                         if (spec_net) {
 329                                 if (rule_spec_net(p))
 330                                         continue;
 331                                 else
 332                                         break;
 333                         } else {
 334                                 continue;
 335                         }
 336                 }
 337
 338                 /* test dir match, same logic as net matching */
 339                 if (!rule_match_dir(p, rule)) {
 340                         if (spec_dir) {
 341                                 if (rule_spec_dir(p))
 342                                         continue;
 343                                 else
 344                                         break;
 345                         } else {
 346                                 continue;
 347                         }
 348                 }
 349
 350                 /* find a match */
 351                 match = 1;
 352                 break;
 353         }
 354
 355         if (match) {
 356                 LASSERT(n >= 0 && n < rset->srs_nrule);
 357
 358                 if (rule->sr_flvr.sf_rpc == SPTLRPC_FLVR_INVALID) {
 359                         /* remove this rule */
 360                         if (n < rset->srs_nrule - 1)
 361                                 memmove(&rset->srs_rules[n],
 362                                         &rset->srs_rules[n + 1],
 363                                         (rset->srs_nrule - n - 1) *
 364                                         sizeof(*rule));
 365                         rset->srs_nrule--;
 366                 } else {
 367                         /* override the rule */
 368                         memcpy(&rset->srs_rules[n], rule, sizeof(*rule));
 369                 }
 370         } else {
 371                 LASSERT(n >= 0 && n <= rset->srs_nrule);
 372
 373                 if (rule->sr_flvr.sf_rpc != SPTLRPC_FLVR_INVALID) {
 374                         rc = sptlrpc_rule_set_expand(rset);
 375                         if (rc)
 376                                 return rc;
 377
 378                         if (n < rset->srs_nrule)
 379                                 memmove(&rset->srs_rules[n + 1],
 380                                         &rset->srs_rules[n],
 381                                         (rset->srs_nrule - n) * sizeof(*rule));
 382                         memcpy(&rset->srs_rules[n], rule, sizeof(*rule));
 383                         rset->srs_nrule++;
 384                 } else {
 385                         CDEBUG(D_CONFIG, "ignore the unmatched deletion\n");
 386                 }
 387         }
 388
 389         return 0;
 390 }
 391 EXPORT_SYMBOL(sptlrpc_rule_set_merge);
 392
 393 /**
 394  * given from/to/nid, determine a matching flavor in ruleset.
 395  * return 1 if a match found, otherwise return 0.
 396  */
 397 int sptlrpc_rule_set_choose(struct sptlrpc_rule_set *rset,
 398                             enum lustre_sec_part from,
 399                             enum lustre_sec_part to,
 400                             lnet_nid_t nid,
 401                             struct sptlrpc_flavor *sf)
 402 {
 403         struct sptlrpc_rule *r;
 404         int n;
 405
 406         for (n = 0; n < rset->srs_nrule; n++) {
 407                 r = &rset->srs_rules[n];
 408
 409                 if (LNET_NIDNET(nid) != LNET_NET_ANY &&
 410                     r->sr_netid != LNET_NET_ANY &&
 411                     LNET_NIDNET(nid) != r->sr_netid)
 412                         continue;
 413
 414                 if (from != LUSTRE_SP_ANY && r->sr_from != LUSTRE_SP_ANY &&
 415                     from != r->sr_from)
 416                         continue;
 417
 418                 if (to != LUSTRE_SP_ANY && r->sr_to != LUSTRE_SP_ANY &&
 419                     to != r->sr_to)
 420                         continue;
 421
 422                 *sf = r->sr_flvr;
 423                 return 1;
 424         }
 425
 426         return 0;
 427 }
 428
 429 void sptlrpc_rule_set_dump(struct sptlrpc_rule_set *rset)
 430 {
 431         struct sptlrpc_rule *r;
 432         int     n;
 433
 434         for (n = 0; n < rset->srs_nrule; n++) {
 435                 r = &rset->srs_rules[n];
 436                 CDEBUG(D_SEC, "<%02d> from %x to %x, net %x, rpc %x\n", n,
 437                        r->sr_from, r->sr_to, r->sr_netid, r->sr_flvr.sf_rpc);
 438         }
 439 }
 440
 441 static int sptlrpc_rule_set_extract(struct sptlrpc_rule_set *gen,
 442                                     struct sptlrpc_rule_set *tgt,
 443                                     enum lustre_sec_part from,
 444                                     enum lustre_sec_part to,
 445                                     struct sptlrpc_rule_set *rset)
 446 {
 447         struct sptlrpc_rule_set *src[2] = { gen, tgt };
 448         struct sptlrpc_rule     *rule;
 449         int                      i, n, rc;
 450
 451         might_sleep();
 452
 453         /* merge general rules firstly, then target-specific rules */
 454         for (i = 0; i < 2; i++) {
 455                 if (src[i] == NULL)
 456                         continue;
 457
 458                 for (n = 0; n < src[i]->srs_nrule; n++) {
 459                         rule = &src[i]->srs_rules[n];
 460
 461                         if (from != LUSTRE_SP_ANY &&
 462                             rule->sr_from != LUSTRE_SP_ANY &&
 463                             rule->sr_from != from)
 464                                 continue;
 465                         if (to != LUSTRE_SP_ANY &&
 466                             rule->sr_to != LUSTRE_SP_ANY &&
 467                             rule->sr_to != to)
 468                                 continue;
 469
 470                         rc = sptlrpc_rule_set_merge(rset, rule);
 471                         if (rc) {
 472                                 CERROR("can't merge: %d\n", rc);
 473                                 return rc;
 474                         }
 475                 }
 476         }
 477
 478         return 0;
 479 }
 480
 481 /**********************************
 482  * sptlrpc configuration support  *
 483  **********************************/
 484
 485 struct sptlrpc_conf_tgt {
 486         struct list_head              sct_list;
 487         char                    sct_name[MAX_OBD_NAME];
 488         struct sptlrpc_rule_set sct_rset;
 489 };
 490
 491 struct sptlrpc_conf {
 492         struct list_head        sc_list;
 493         char                    sc_fsname[MTI_NAME_MAXLEN];
 494         unsigned int            sc_modified;    /* modified during updating */
 495         unsigned int            sc_updated:1,   /* updated copy from MGS */
 496                                 sc_local:1;     /* local copy from target */
 497         struct sptlrpc_rule_set sc_rset;        /* fs general rules */
 498         struct list_head        sc_tgts;        /* target-specific rules */
 499 };
 500
 501 static struct mutex sptlrpc_conf_lock;
 502 static LIST_HEAD(sptlrpc_confs);
 503
 504 static void sptlrpc_conf_free_rsets(struct sptlrpc_conf *conf)
 505 {
 506         struct sptlrpc_conf_tgt *conf_tgt, *conf_tgt_next;
 507
 508         sptlrpc_rule_set_free(&conf->sc_rset);
 509
 510         list_for_each_entry_safe(conf_tgt, conf_tgt_next,
 511                                  &conf->sc_tgts, sct_list) {
 512                 sptlrpc_rule_set_free(&conf_tgt->sct_rset);
 513                 list_del(&conf_tgt->sct_list);
 514                 OBD_FREE_PTR(conf_tgt);
 515         }
 516         LASSERT(list_empty(&conf->sc_tgts));
 517
 518         conf->sc_updated = 0;
 519         conf->sc_local = 0;
 520 }
 521
 522 static void sptlrpc_conf_free(struct sptlrpc_conf *conf)
 523 {
 524         CDEBUG(D_SEC, "free sptlrpc conf %s\n", conf->sc_fsname);
 525
 526         sptlrpc_conf_free_rsets(conf);
 527         list_del(&conf->sc_list);
 528         OBD_FREE_PTR(conf);
 529 }
 530
 531 static
 532 struct sptlrpc_conf_tgt *sptlrpc_conf_get_tgt(struct sptlrpc_conf *conf,
 533                                               const char *name,
 534                                               int create)
 535 {
 536         struct sptlrpc_conf_tgt *conf_tgt;
 537
 538         list_for_each_entry(conf_tgt, &conf->sc_tgts, sct_list) {
 539                 if (strcmp(conf_tgt->sct_name, name) == 0)
 540                         return conf_tgt;
 541         }
 542
 543         if (!create)
 544                 return NULL;
 545
 546         OBD_ALLOC_PTR(conf_tgt);
 547         if (conf_tgt) {
 548                 strlcpy(conf_tgt->sct_name, name, sizeof(conf_tgt->sct_name));
 549                 sptlrpc_rule_set_init(&conf_tgt->sct_rset);
 550                 list_add(&conf_tgt->sct_list, &conf->sc_tgts);
 551         }
 552
 553         return conf_tgt;
 554 }
 555
 556 static
 557 struct sptlrpc_conf *sptlrpc_conf_get(const char *fsname,
 558                                       int create)
 559 {
 560         struct sptlrpc_conf *conf;
 561
 562         list_for_each_entry(conf, &sptlrpc_confs, sc_list) {
 563                 if (strcmp(conf->sc_fsname, fsname) == 0)
 564                         return conf;
 565         }
 566
 567         if (!create)
 568                 return NULL;
 569
 570         OBD_ALLOC_PTR(conf);
 571         if (conf == NULL)
 572                 return NULL;
 573
 574         if (strlcpy(conf->sc_fsname, fsname, sizeof(conf->sc_fsname)) >=
 575             sizeof(conf->sc_fsname)) {
 576                 OBD_FREE_PTR(conf);
 577                 return NULL;
 578         }
 579         sptlrpc_rule_set_init(&conf->sc_rset);
 580         INIT_LIST_HEAD(&conf->sc_tgts);
 581         list_add(&conf->sc_list, &sptlrpc_confs);
 582
 583         CDEBUG(D_SEC, "create sptlrpc conf %s\n", conf->sc_fsname);
 584         return conf;
 585 }
 586
 587 /**
 588  * caller must hold conf_lock already.
 589  */
 590 static int sptlrpc_conf_merge_rule(struct sptlrpc_conf *conf,
 591                                    const char *target,
 592                                    struct sptlrpc_rule *rule)
 593 {
 594         struct sptlrpc_conf_tgt  *conf_tgt;
 595         struct sptlrpc_rule_set  *rule_set;
 596
 597         /* fsname == target means general rules for the whole fs */
 598         if (strcmp(conf->sc_fsname, target) == 0) {
 599                 rule_set = &conf->sc_rset;
 600         } else {
 601                 conf_tgt = sptlrpc_conf_get_tgt(conf, target, 1);
 602                 if (conf_tgt) {
 603                         rule_set = &conf_tgt->sct_rset;
 604                 } else {
 605                         CERROR("out of memory, can't merge rule!\n");
 606                         return -ENOMEM;
 607                 }
 608         }
 609
 610         return sptlrpc_rule_set_merge(rule_set, rule);
 611 }
 612
 613 /**
 614  * process one LCFG_SPTLRPC_CONF record. if \a conf is NULL, we
 615  * find one through the target name in the record inside conf_lock;
 616  * otherwise means caller already hold conf_lock.
 617  */
 618 static int __sptlrpc_process_config(char *target, const char *fsname,
 619                                     struct sptlrpc_rule *rule,
 620                                     struct sptlrpc_conf *conf)
 621 {
 622         int rc;
 623
 624         ENTRY;
 625         if (!conf) {
 626                 if (!fsname)
 627                         return -ENODEV;
 628
 629                 mutex_lock(&sptlrpc_conf_lock);
 630                 conf = sptlrpc_conf_get(fsname, 0);
 631                 if (!conf) {
 632                         CERROR("can't find conf\n");
 633                         rc = -ENOMEM;
 634                 } else {
 635                         rc = sptlrpc_conf_merge_rule(conf, target, rule);
 636                 }
 637                 mutex_unlock(&sptlrpc_conf_lock);
 638         } else {
 639                 LASSERT(mutex_is_locked(&sptlrpc_conf_lock));
 640                 rc = sptlrpc_conf_merge_rule(conf, target, rule);
 641         }
 642
 643         if (!rc)
 644                 conf->sc_modified++;
 645
 646         RETURN(rc);
 647 }
 648
 649 int sptlrpc_process_config(struct lustre_cfg *lcfg)
 650 {
 651         char fsname[MTI_NAME_MAXLEN];
 652         struct sptlrpc_rule rule;
 653         char *target, *param;
 654         int rc;
 655
 656         print_lustre_cfg(lcfg);
 657
 658         target = lustre_cfg_string(lcfg, 1);
 659         if (!target) {
 660                 CERROR("missing target name\n");
 661                 return -EINVAL;
 662         }
 663
 664         param = lustre_cfg_string(lcfg, 2);
 665         if (!param) {
 666                 CERROR("missing parameter\n");
 667                 return -EINVAL;
 668         }
 669
 670         /* parse rule to make sure the format is correct */
 671         if (strncmp(param, PARAM_SRPC_FLVR,
 672                     sizeof(PARAM_SRPC_FLVR) - 1) != 0) {
 673                 CERROR("Invalid sptlrpc parameter: %s\n", param);
 674                 return -EINVAL;
 675         }
 676         param += sizeof(PARAM_SRPC_FLVR) - 1;
 677
 678         CDEBUG(D_SEC, "processing rule: %s.%s\n", target, param);
 679
 680         /*
 681          * Three types of targets exist for sptlrpc using conf_param
 682          * 1.   '_mgs' which targets mgc srpc settings. Treat it as
 683          *      as a special file system name.
 684          * 2.   target is a device which can be fsname-MDTXXXX or
 685          *      fsname-OSTXXXX. This can be verified by the function
 686          *      server_name2fsname.
 687          * 3.   If both above conditions are not meet then the target
 688          *      is a actual filesystem.
 689          */
 690         if (server_name2fsname(target, fsname, NULL))
 691                 strlcpy(fsname, target, sizeof(target));
 692
 693         rc = sptlrpc_parse_rule(param, &rule);
 694         if (rc)
 695                 return rc;
 696
 697         return __sptlrpc_process_config(target, fsname, &rule, NULL);
 698 }
 699 EXPORT_SYMBOL(sptlrpc_process_config);
 700
 701 static int logname2fsname(const char *logname, char *buf, int buflen)
 702 {
 703         char   *ptr;
 704         int     len;
 705
 706         ptr = strrchr(logname, '-');
 707         if (ptr == NULL || strcmp(ptr, "-sptlrpc")) {
 708                 CERROR("%s is not a sptlrpc config log\n", logname);
 709                 return -EINVAL;
 710         }
 711
 712         len = min((int) (ptr - logname), buflen - 1);
 713
 714         memcpy(buf, logname, len);
 715         buf[len] = '\0';
 716         return 0;
 717 }
 718
 719 void sptlrpc_conf_log_update_begin(const char *logname)
 720 {
 721         struct sptlrpc_conf *conf;
 722         char                 fsname[16];
 723
 724         if (logname2fsname(logname, fsname, sizeof(fsname)))
 725                 return;
 726
 727         mutex_lock(&sptlrpc_conf_lock);
 728
 729         conf = sptlrpc_conf_get(fsname, 0);
 730         if (conf) {
 731                 if (conf->sc_local) {
 732                         LASSERT(conf->sc_updated == 0);
 733                         sptlrpc_conf_free_rsets(conf);
 734                 }
 735                 conf->sc_modified = 0;
 736         }
 737
 738         mutex_unlock(&sptlrpc_conf_lock);
 739 }
 740 EXPORT_SYMBOL(sptlrpc_conf_log_update_begin);
 741
 742 /**
 743  * mark a config log has been updated
 744  */
 745 void sptlrpc_conf_log_update_end(const char *logname)
 746 {
 747         struct sptlrpc_conf *conf;
 748         char                 fsname[16];
 749
 750         if (logname2fsname(logname, fsname, sizeof(fsname)))
 751                 return;
 752
 753         mutex_lock(&sptlrpc_conf_lock);
 754
 755         conf = sptlrpc_conf_get(fsname, 0);
 756         if (conf) {
 757                 /*
 758                  * if original state is not updated, make sure the
 759                  * modified counter > 0 to enforce updating local copy.
 760                  */
 761                 if (conf->sc_updated == 0)
 762                         conf->sc_modified++;
 763
 764                 conf->sc_updated = 1;
 765         }
 766
 767         mutex_unlock(&sptlrpc_conf_lock);
 768 }
 769 EXPORT_SYMBOL(sptlrpc_conf_log_update_end);
 770
 771 void sptlrpc_conf_log_start(const char *logname)
 772 {
 773         char                 fsname[16];
 774
 775         if (logname2fsname(logname, fsname, sizeof(fsname)))
 776                 return;
 777
 778         mutex_lock(&sptlrpc_conf_lock);
 779         sptlrpc_conf_get(fsname, 1);
 780         mutex_unlock(&sptlrpc_conf_lock);
 781 }
 782 EXPORT_SYMBOL(sptlrpc_conf_log_start);
 783
 784 void sptlrpc_conf_log_stop(const char *logname)
 785 {
 786         struct sptlrpc_conf *conf;
 787         char                 fsname[16];
 788
 789         if (logname2fsname(logname, fsname, sizeof(fsname)))
 790                 return;
 791
 792         mutex_lock(&sptlrpc_conf_lock);
 793         conf = sptlrpc_conf_get(fsname, 0);
 794         if (conf)
 795                 sptlrpc_conf_free(conf);
 796         mutex_unlock(&sptlrpc_conf_lock);
 797 }
 798 EXPORT_SYMBOL(sptlrpc_conf_log_stop);
 799
 800 static void inline flavor_set_flags(struct sptlrpc_flavor *sf,
 801                                     enum lustre_sec_part from,
 802                                     enum lustre_sec_part to,
 803                                     unsigned int fl_udesc)
 804 {
 805         /*
 806          * null flavor doesn't need to set any flavor, and in fact
 807          * we'd better not do that because everybody share a single sec.
 808          */
 809         if (sf->sf_rpc == SPTLRPC_FLVR_NULL)
 810                 return;
 811
 812         if (from == LUSTRE_SP_MDT) {
 813                 /* MDT->MDT; MDT->OST */
 814                 sf->sf_flags |= PTLRPC_SEC_FL_ROOTONLY;
 815         } else if (from == LUSTRE_SP_CLI && to == LUSTRE_SP_OST) {
 816                 /* CLI->OST */
 817                 sf->sf_flags |= PTLRPC_SEC_FL_ROOTONLY | PTLRPC_SEC_FL_BULK;
 818         } else if (from == LUSTRE_SP_CLI && to == LUSTRE_SP_MDT) {
 819                 /* CLI->MDT */
 820                 if (fl_udesc && sf->sf_rpc != SPTLRPC_FLVR_NULL)
 821                         sf->sf_flags |= PTLRPC_SEC_FL_UDESC;
 822         }
 823
 824         /* Some flavors use a single uid (0) context */
 825         if (flvr_is_rootonly(sf->sf_rpc))
 826                 sf->sf_flags |= PTLRPC_SEC_FL_ROOTONLY;
 827
 828         /* User descriptor might need to be cleared */
 829         if (flvr_allows_user_desc(sf->sf_rpc) == 0)
 830                 sf->sf_flags &= ~PTLRPC_SEC_FL_UDESC;
 831 }
 832
 833 void sptlrpc_conf_choose_flavor(enum lustre_sec_part from,
 834                                 enum lustre_sec_part to,
 835                                 struct obd_uuid *target,
 836                                 lnet_nid_t nid,
 837                                 struct sptlrpc_flavor *sf)
 838 {
 839         struct sptlrpc_conf     *conf;
 840         struct sptlrpc_conf_tgt *conf_tgt;
 841         char                     name[MTI_NAME_MAXLEN];
 842         int                      len, rc = 0;
 843
 844         obd_uuid2fsname(name, target->uuid, sizeof(name));
 845
 846         mutex_lock(&sptlrpc_conf_lock);
 847
 848         conf = sptlrpc_conf_get(name, 0);
 849         if (conf == NULL)
 850                 goto out;
 851
 852         /* convert uuid name (supposed end with _UUID) to target name */
 853         len = strlen(target->uuid);
 854         LASSERT(len > 5);
 855         memcpy(name, target->uuid, len - 5);
 856         name[len - 5] = '\0';
 857
 858         conf_tgt = sptlrpc_conf_get_tgt(conf, name, 0);
 859         if (conf_tgt) {
 860                 rc = sptlrpc_rule_set_choose(&conf_tgt->sct_rset,
 861                                              from, to, nid, sf);
 862                 if (rc)
 863                         goto out;
 864         }
 865
 866         rc = sptlrpc_rule_set_choose(&conf->sc_rset, from, to, nid, sf);
 867 out:
 868         mutex_unlock(&sptlrpc_conf_lock);
 869
 870         if (rc == 0)
 871                 get_default_flavor(sf);
 872
 873         flavor_set_flags(sf, from, to, 1);
 874 }
 875
 876 /**
 877  * called by target devices, determine the expected flavor from
 878  * certain peer (from, nid).
 879  */
 880 void sptlrpc_target_choose_flavor(struct sptlrpc_rule_set *rset,
 881                                   enum lustre_sec_part from,
 882                                   lnet_nid_t nid,
 883                                   struct sptlrpc_flavor *sf)
 884 {
 885         if (sptlrpc_rule_set_choose(rset, from, LUSTRE_SP_ANY, nid, sf) == 0)
 886                 get_default_flavor(sf);
 887 }
 888
 889 #define SEC_ADAPT_DELAY         (10)
 890
 891 /**
 892  * called by client devices, notify the sptlrpc config has changed and
 893  * do import_sec_adapt later.
 894  */
 895 void sptlrpc_conf_client_adapt(struct obd_device *obd)
 896 {
 897         struct obd_import  *imp;
 898         int rc;
 899         ENTRY;
 900
 901         LASSERT(strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0 ||
 902                 strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME) == 0 ||
 903                 strcmp(obd->obd_type->typ_name, LUSTRE_OSP_NAME) == 0 ||
 904                 strcmp(obd->obd_type->typ_name, LUSTRE_LWP_NAME) == 0);
 905         CDEBUG(D_SEC, "obd %s\n", obd->u.cli.cl_target_uuid.uuid);
 906
 907         /* serialize with connect/disconnect import */
 908         with_imp_locked_nested(obd, imp, rc, OBD_CLI_SEM_MDCOSC) {
 909                 write_lock(&imp->imp_sec_lock);
 910                 if (imp->imp_sec)
 911                         imp->imp_sec_expire = ktime_get_real_seconds() +
 912                                 SEC_ADAPT_DELAY;
 913                 write_unlock(&imp->imp_sec_lock);
 914         }
 915
 916         EXIT;
 917 }
 918 EXPORT_SYMBOL(sptlrpc_conf_client_adapt);
 919
 920 /**
 921  * called by target devices, extract sptlrpc rules which applies to
 922  * this target, to be used for future rpc flavor checking.
 923  */
 924 int sptlrpc_conf_target_get_rules(struct obd_device *obd,
 925                                   struct sptlrpc_rule_set *rset)
 926 {
 927         struct sptlrpc_conf *conf;
 928         struct sptlrpc_conf_tgt *conf_tgt;
 929         enum lustre_sec_part sp_dst;
 930         char fsname[MTI_NAME_MAXLEN];
 931         int rc = 0;
 932         ENTRY;
 933
 934         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDT_NAME) == 0) {
 935                 sp_dst = LUSTRE_SP_MDT;
 936         } else if (strcmp(obd->obd_type->typ_name, LUSTRE_OST_NAME) == 0) {
 937                 sp_dst = LUSTRE_SP_OST;
 938         } else {
 939                 CERROR("unexpected obd type %s\n", obd->obd_type->typ_name);
 940                 RETURN(-EINVAL);
 941         }
 942
 943         obd_uuid2fsname(fsname, obd->obd_uuid.uuid, sizeof(fsname));
 944
 945         mutex_lock(&sptlrpc_conf_lock);
 946         conf = sptlrpc_conf_get(fsname, 0);
 947         if (conf == NULL) {
 948                 CERROR("missing sptlrpc config log\n");
 949                 rc = -EFAULT;
 950         } else {
 951                 /* extract rule set for this target */
 952                 conf_tgt = sptlrpc_conf_get_tgt(conf, obd->obd_name, 0);
 953
 954                 rc = sptlrpc_rule_set_extract(&conf->sc_rset,
 955                                       conf_tgt ? &conf_tgt->sct_rset : NULL,
 956                                       LUSTRE_SP_ANY, sp_dst, rset);
 957         }
 958         mutex_unlock(&sptlrpc_conf_lock);
 959
 960         RETURN(rc);
 961 }
 962
 963 int  sptlrpc_conf_init(void)
 964 {
 965         mutex_init(&sptlrpc_conf_lock);
 966         return 0;
 967 }
 968
 969 void sptlrpc_conf_fini(void)
 970 {
 971         struct sptlrpc_conf  *conf, *conf_next;
 972
 973         mutex_lock(&sptlrpc_conf_lock);
 974         list_for_each_entry_safe(conf, conf_next, &sptlrpc_confs, sc_list)
 975                 sptlrpc_conf_free(conf);
 976         LASSERT(list_empty(&sptlrpc_confs));
 977         mutex_unlock(&sptlrpc_conf_lock);
 978 }