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, 2016, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  */
  32
  33 #define DEBUG_SUBSYSTEM S_SEC
  34
  35 #include <libcfs/libcfs.h>
  36 #include <linux/crypto.h>
  37 #include <linux/key.h>
  38
  39 #include <obd.h>
  40 #include <obd_class.h>
  41 #include <obd_support.h>
  42 #include <lustre_net.h>
  43 #include <lustre_import.h>
  44 #include <lustre_log.h>
  45 #include <lustre_disk.h>
  46 #include <lustre_dlm.h>
  47 #include <lustre_param.h>
  48 #include <lustre_sec.h>
  49
  50 #include "ptlrpc_internal.h"
  51
  52 const char *sptlrpc_part2name(enum lustre_sec_part part)
  53 {
  54         switch (part) {
  55         case LUSTRE_SP_CLI:
  56                 return "cli";
  57         case LUSTRE_SP_MDT:
  58                 return "mdt";
  59         case LUSTRE_SP_OST:
  60                 return "ost";
  61         case LUSTRE_SP_MGC:
  62                 return "mgc";
  63         case LUSTRE_SP_MGS:
  64                 return "mgs";
  65         case LUSTRE_SP_ANY:
  66                 return "any";
  67         default:
  68                 return "err";
  69         }
  70 }
  71 EXPORT_SYMBOL(sptlrpc_part2name);
  72
  73 enum lustre_sec_part sptlrpc_target_sec_part(struct obd_device *obd)
  74 {
  75         const char *type = obd->obd_type->typ_name;
  76
  77         if (!strcmp(type, LUSTRE_MDT_NAME))
  78                 return LUSTRE_SP_MDT;
  79         if (!strcmp(type, LUSTRE_OST_NAME))
  80                 return LUSTRE_SP_OST;
  81         if (!strcmp(type, LUSTRE_MGS_NAME))
  82                 return LUSTRE_SP_MGS;
  83
  84         CERROR("unknown target %p(%s)\n", obd, type);
  85         return LUSTRE_SP_ANY;
  86 }
  87
  88 /****************************************
  89  * user supplied flavor string parsing  *
  90  ****************************************/
  91
  92 /*
  93  * format: <base_flavor>[-<bulk_type:alg_spec>]
  94  */
  95 int sptlrpc_parse_flavor(const char *str, struct sptlrpc_flavor *flvr)
  96 {
  97         char            buf[32];
  98         char           *bulk, *alg;
  99
 100         memset(flvr, 0, sizeof(*flvr));
 101
 102         if (str == NULL || str[0] == '\0') {
 103                 flvr->sf_rpc = SPTLRPC_FLVR_INVALID;
 104                 return 0;
 105         }
 106
 107         strlcpy(buf, str, sizeof(buf));
 108
 109         bulk = strchr(buf, '-');
 110         if (bulk)
 111                 *bulk++ = '\0';
 112
 113         flvr->sf_rpc = sptlrpc_name2flavor_base(buf);
 114         if (flvr->sf_rpc == SPTLRPC_FLVR_INVALID)
 115                 goto err_out;
 116
 117         /*
 118          * currently only base flavor "plain" can have bulk specification.
 119          */
 120         if (flvr->sf_rpc == SPTLRPC_FLVR_PLAIN) {
 121                 flvr->u_bulk.hash.hash_alg = BULK_HASH_ALG_ADLER32;
 122                 if (bulk) {
 123                         /*
 124                          * format: plain-hash:<hash_alg>
 125                          */
 126                         alg = strchr(bulk, ':');
 127                         if (alg == NULL)
 128                                 goto err_out;
 129                         *alg++ = '\0';
 130
 131                         if (strcmp(bulk, "hash"))
 132                                 goto err_out;
 133
 134                         flvr->u_bulk.hash.hash_alg = sptlrpc_get_hash_alg(alg);
 135                         if (flvr->u_bulk.hash.hash_alg >= BULK_HASH_ALG_MAX)
 136                                 goto err_out;
 137                 }
 138
 139                 if (flvr->u_bulk.hash.hash_alg == BULK_HASH_ALG_NULL)
 140                         flvr_set_bulk_svc(&flvr->sf_rpc, SPTLRPC_BULK_SVC_NULL);
 141                 else
 142                         flvr_set_bulk_svc(&flvr->sf_rpc, SPTLRPC_BULK_SVC_INTG);
 143         } else {
 144                 if (bulk)
 145                         goto err_out;
 146         }
 147
 148         flvr->sf_flags = 0;
 149         return 0;
 150
 151 err_out:
 152         CERROR("invalid flavor string: %s\n", str);
 153         return -EINVAL;
 154 }
 155 EXPORT_SYMBOL(sptlrpc_parse_flavor);
 156
 157 /****************************************
 158  * configure rules                      *
 159  ****************************************/
 160
 161 static void get_default_flavor(struct sptlrpc_flavor *sf)
 162 {
 163         memset(sf, 0, sizeof(*sf));
 164
 165         sf->sf_rpc = SPTLRPC_FLVR_NULL;
 166         sf->sf_flags = 0;
 167 }
 168
 169 static void sptlrpc_rule_init(struct sptlrpc_rule *rule)
 170 {
 171         rule->sr_netid = LNET_NIDNET(LNET_NID_ANY);
 172         rule->sr_from = LUSTRE_SP_ANY;
 173         rule->sr_to = LUSTRE_SP_ANY;
 174         rule->sr_padding = 0;
 175
 176         get_default_flavor(&rule->sr_flvr);
 177 }
 178
 179 /*
 180  * format: network[.direction]=flavor
 181  */
 182 int sptlrpc_parse_rule(char *param, struct sptlrpc_rule *rule)
 183 {
 184         char           *flavor, *dir;
 185         int             rc;
 186
 187         sptlrpc_rule_init(rule);
 188
 189         flavor = strchr(param, '=');
 190         if (flavor == NULL) {
 191                 CERROR("invalid param, no '='\n");
 192                 RETURN(-EINVAL);
 193         }
 194         *flavor++ = '\0';
 195
 196         dir = strchr(param, '.');
 197         if (dir)
 198                 *dir++ = '\0';
 199
 200         /* 1.1 network */
 201         if (strcmp(param, "default")) {
 202                 rule->sr_netid = libcfs_str2net(param);
 203                 if (rule->sr_netid == LNET_NIDNET(LNET_NID_ANY)) {
 204                         CERROR("invalid network name: %s\n", param);
 205                         RETURN(-EINVAL);
 206                 }
 207         }
 208
 209         /* 1.2 direction */
 210         if (dir) {
 211                 if (!strcmp(dir, "mdt2ost")) {
 212                         rule->sr_from = LUSTRE_SP_MDT;
 213                         rule->sr_to = LUSTRE_SP_OST;
 214                 } else if (!strcmp(dir, "mdt2mdt")) {
 215                         rule->sr_from = LUSTRE_SP_MDT;
 216                         rule->sr_to = LUSTRE_SP_MDT;
 217                 } else if (!strcmp(dir, "cli2ost")) {
 218                         rule->sr_from = LUSTRE_SP_CLI;
 219                         rule->sr_to = LUSTRE_SP_OST;
 220                 } else if (!strcmp(dir, "cli2mdt")) {
 221                         rule->sr_from = LUSTRE_SP_CLI;
 222                         rule->sr_to = LUSTRE_SP_MDT;
 223                 } else {
 224                         CERROR("invalid rule dir segment: %s\n", dir);
 225                         RETURN(-EINVAL);
 226                 }
 227         }
 228
 229         /* 2.1 flavor */
 230         rc = sptlrpc_parse_flavor(flavor, &rule->sr_flvr);
 231         if (rc)
 232                 RETURN(-EINVAL);
 233
 234         RETURN(0);
 235 }
 236 EXPORT_SYMBOL(sptlrpc_parse_rule);
 237
 238 void sptlrpc_rule_set_free(struct sptlrpc_rule_set *rset)
 239 {
 240         LASSERT(rset->srs_nslot ||
 241                 (rset->srs_nrule == 0 && rset->srs_rules == NULL));
 242
 243         if (rset->srs_nslot) {
 244                 OBD_FREE(rset->srs_rules,
 245                          rset->srs_nslot * sizeof(*rset->srs_rules));
 246                 sptlrpc_rule_set_init(rset);
 247         }
 248 }
 249 EXPORT_SYMBOL(sptlrpc_rule_set_free);
 250
 251 /*
 252  * return 0 if the rule set could accomodate one more rule.
 253  */
 254 int sptlrpc_rule_set_expand(struct sptlrpc_rule_set *rset)
 255 {
 256         struct sptlrpc_rule *rules;
 257         int nslot;
 258
 259         might_sleep();
 260
 261         if (rset->srs_nrule < rset->srs_nslot)
 262                 return 0;
 263
 264         nslot = rset->srs_nslot + 8;
 265
 266         /* better use realloc() if available */
 267         OBD_ALLOC(rules, nslot * sizeof(*rset->srs_rules));
 268         if (rules == NULL)
 269                 return -ENOMEM;
 270
 271         if (rset->srs_nrule) {
 272                 LASSERT(rset->srs_nslot && rset->srs_rules);
 273                 memcpy(rules, rset->srs_rules,
 274                        rset->srs_nrule * sizeof(*rset->srs_rules));
 275
 276                 OBD_FREE(rset->srs_rules,
 277                          rset->srs_nslot * sizeof(*rset->srs_rules));
 278         }
 279
 280         rset->srs_rules = rules;
 281         rset->srs_nslot = nslot;
 282         return 0;
 283 }
 284
 285 static inline int rule_spec_dir(struct sptlrpc_rule *rule)
 286 {
 287         return (rule->sr_from != LUSTRE_SP_ANY ||
 288                 rule->sr_to != LUSTRE_SP_ANY);
 289 }
 290 static inline int rule_spec_net(struct sptlrpc_rule *rule)
 291 {
 292         return (rule->sr_netid != LNET_NIDNET(LNET_NID_ANY));
 293 }
 294 static inline int rule_match_dir(struct sptlrpc_rule *r1,
 295                                  struct sptlrpc_rule *r2)
 296 {
 297         return (r1->sr_from == r2->sr_from && r1->sr_to == r2->sr_to);
 298 }
 299 static inline int rule_match_net(struct sptlrpc_rule *r1,
 300                                  struct sptlrpc_rule *r2)
 301 {
 302         return (r1->sr_netid == r2->sr_netid);
 303 }
 304
 305 /*
 306  * merge @rule into @rset.
 307  * the @rset slots might be expanded.
 308  */
 309 int sptlrpc_rule_set_merge(struct sptlrpc_rule_set *rset,
 310                            struct sptlrpc_rule *rule)
 311 {
 312         struct sptlrpc_rule      *p = rset->srs_rules;
 313         int                       spec_dir, spec_net;
 314         int                       rc, n, match = 0;
 315
 316         might_sleep();
 317
 318         spec_net = rule_spec_net(rule);
 319         spec_dir = rule_spec_dir(rule);
 320
 321         for (n = 0; n < rset->srs_nrule; n++) {
 322                 p = &rset->srs_rules[n];
 323
 324                 /* test network match, if failed:
 325                  * - spec rule: skip rules which is also spec rule match, until
 326                  *   we hit a wild rule, which means no more chance
 327                  * - wild rule: skip until reach the one which is also wild
 328                  *   and matches
 329                  */
 330                 if (!rule_match_net(p, rule)) {
 331                         if (spec_net) {
 332                                 if (rule_spec_net(p))
 333                                         continue;
 334                                 else
 335                                         break;
 336                         } else {
 337                                 continue;
 338                         }
 339                 }
 340
 341                 /* test dir match, same logic as net matching */
 342                 if (!rule_match_dir(p, rule)) {
 343                         if (spec_dir) {
 344                                 if (rule_spec_dir(p))
 345                                         continue;
 346                                 else
 347                                         break;
 348                         } else {
 349                                 continue;
 350                         }
 351                 }
 352
 353                 /* find a match */
 354                 match = 1;
 355                 break;
 356         }
 357
 358         if (match) {
 359                 LASSERT(n >= 0 && n < rset->srs_nrule);
 360
 361                 if (rule->sr_flvr.sf_rpc == SPTLRPC_FLVR_INVALID) {
 362                         /* remove this rule */
 363                         if (n < rset->srs_nrule - 1)
 364                                 memmove(&rset->srs_rules[n],
 365                                         &rset->srs_rules[n + 1],
 366                                         (rset->srs_nrule - n - 1) *
 367                                         sizeof(*rule));
 368                         rset->srs_nrule--;
 369                 } else {
 370                         /* override the rule */
 371                         memcpy(&rset->srs_rules[n], rule, sizeof(*rule));
 372                 }
 373         } else {
 374                 LASSERT(n >= 0 && n <= rset->srs_nrule);
 375
 376                 if (rule->sr_flvr.sf_rpc != SPTLRPC_FLVR_INVALID) {
 377                         rc = sptlrpc_rule_set_expand(rset);
 378                         if (rc)
 379                                 return rc;
 380
 381                         if (n < rset->srs_nrule)
 382                                 memmove(&rset->srs_rules[n + 1],
 383                                         &rset->srs_rules[n],
 384                                         (rset->srs_nrule - n) * sizeof(*rule));
 385                         memcpy(&rset->srs_rules[n], rule, sizeof(*rule));
 386                         rset->srs_nrule++;
 387                 } else {
 388                         CDEBUG(D_CONFIG, "ignore the unmatched deletion\n");
 389                 }
 390         }
 391
 392         return 0;
 393 }
 394 EXPORT_SYMBOL(sptlrpc_rule_set_merge);
 395
 396 /**
 397  * given from/to/nid, determine a matching flavor in ruleset.
 398  * return 1 if a match found, otherwise return 0.
 399  */
 400 int sptlrpc_rule_set_choose(struct sptlrpc_rule_set *rset,
 401                             enum lustre_sec_part from,
 402                             enum lustre_sec_part to,
 403                             lnet_nid_t nid,
 404                             struct sptlrpc_flavor *sf)
 405 {
 406         struct sptlrpc_rule    *r;
 407         int                     n;
 408
 409         for (n = 0; n < rset->srs_nrule; n++) {
 410                 r = &rset->srs_rules[n];
 411
 412                 if (LNET_NIDNET(nid) != LNET_NIDNET(LNET_NID_ANY) &&
 413                     r->sr_netid != LNET_NIDNET(LNET_NID_ANY) &&
 414                     LNET_NIDNET(nid) != r->sr_netid)
 415                         continue;
 416
 417                 if (from != LUSTRE_SP_ANY && r->sr_from != LUSTRE_SP_ANY &&
 418                     from != r->sr_from)
 419                         continue;
 420
 421                 if (to != LUSTRE_SP_ANY && r->sr_to != LUSTRE_SP_ANY &&
 422                     to != r->sr_to)
 423                         continue;
 424
 425                 *sf = r->sr_flvr;
 426                 return 1;
 427         }
 428
 429         return 0;
 430 }
 431
 432 void sptlrpc_rule_set_dump(struct sptlrpc_rule_set *rset)
 433 {
 434         struct sptlrpc_rule *r;
 435         int     n;
 436
 437         for (n = 0; n < rset->srs_nrule; n++) {
 438                 r = &rset->srs_rules[n];
 439                 CDEBUG(D_SEC, "<%02d> from %x to %x, net %x, rpc %x\n", n,
 440                        r->sr_from, r->sr_to, r->sr_netid, r->sr_flvr.sf_rpc);
 441         }
 442 }
 443
 444 static int sptlrpc_rule_set_extract(struct sptlrpc_rule_set *gen,
 445                                     struct sptlrpc_rule_set *tgt,
 446                                     enum lustre_sec_part from,
 447                                     enum lustre_sec_part to,
 448                                     struct sptlrpc_rule_set *rset)
 449 {
 450         struct sptlrpc_rule_set *src[2] = { gen, tgt };
 451         struct sptlrpc_rule     *rule;
 452         int                      i, n, rc;
 453
 454         might_sleep();
 455
 456         /* merge general rules firstly, then target-specific rules */
 457         for (i = 0; i < 2; i++) {
 458                 if (src[i] == NULL)
 459                         continue;
 460
 461                 for (n = 0; n < src[i]->srs_nrule; n++) {
 462                         rule = &src[i]->srs_rules[n];
 463
 464                         if (from != LUSTRE_SP_ANY &&
 465                             rule->sr_from != LUSTRE_SP_ANY &&
 466                             rule->sr_from != from)
 467                                 continue;
 468                         if (to != LUSTRE_SP_ANY &&
 469                             rule->sr_to != LUSTRE_SP_ANY &&
 470                             rule->sr_to != to)
 471                                 continue;
 472
 473                         rc = sptlrpc_rule_set_merge(rset, rule);
 474                         if (rc) {
 475                                 CERROR("can't merge: %d\n", rc);
 476                                 return rc;
 477                         }
 478                 }
 479         }
 480
 481         return 0;
 482 }
 483
 484 /**********************************
 485  * sptlrpc configuration support  *
 486  **********************************/
 487
 488 struct sptlrpc_conf_tgt {
 489         struct list_head              sct_list;
 490         char                    sct_name[MAX_OBD_NAME];
 491         struct sptlrpc_rule_set sct_rset;
 492 };
 493
 494 struct sptlrpc_conf {
 495         struct list_head        sc_list;
 496         char                    sc_fsname[MTI_NAME_MAXLEN];
 497         unsigned int            sc_modified;    /* modified during updating */
 498         unsigned int            sc_updated:1,   /* updated copy from MGS */
 499                                 sc_local:1;     /* local copy from target */
 500         struct sptlrpc_rule_set sc_rset;        /* fs general rules */
 501         struct list_head        sc_tgts;        /* target-specific rules */
 502 };
 503
 504 static struct mutex sptlrpc_conf_lock;
 505 static struct list_head sptlrpc_confs;
 506
 507 /*
 508  * The goal of this function is to extract the file system name
 509  * from the obd name. This can come in two flavors. One is
 510  * fsname-MDTXXXX or fsname-XXXXXXX were X is a hexadecimal
 511  * number. In both cases we should be returned fsname. If it is
 512  * not a valid obd name it is assumed to be the file system
 513  * name itself.
 514  */
 515 static void obdname2fsname(const char *tgt, char *fsname, size_t buflen)
 516 {
 517         const char *ptr;
 518         size_t len;
 519
 520         ptr = strrchr(tgt, '-');
 521         if (ptr) {
 522                 if ((!strncmp(ptr, "-MDT", 4) ||
 523                      !strncmp(ptr, "-OST", 4)) &&
 524                      (isxdigit(ptr[4]) && isxdigit(ptr[5]) &&
 525                       isxdigit(ptr[6]) && isxdigit(ptr[7])))
 526                         goto valid_obd_name;
 527
 528                 /* The length of the obdname can vary on different platforms */
 529                 len = strlen(ptr);
 530                 while (--len) {
 531                         if (!isxdigit(ptr[len])) {
 532                                 ptr = NULL;
 533                                 break;
 534                         }
 535                 }
 536         }
 537
 538 valid_obd_name:
 539         /* if we didn't find the pattern, treat the whole string as fsname */
 540         if (ptr == NULL)
 541                 len = strlen(tgt);
 542         else
 543                 len = ptr - tgt;
 544
 545         len = min(len, buflen - 1);
 546         memcpy(fsname, tgt, len);
 547         fsname[len] = '\0';
 548 }
 549
 550 static void sptlrpc_conf_free_rsets(struct sptlrpc_conf *conf)
 551 {
 552         struct sptlrpc_conf_tgt *conf_tgt, *conf_tgt_next;
 553
 554         sptlrpc_rule_set_free(&conf->sc_rset);
 555
 556         list_for_each_entry_safe(conf_tgt, conf_tgt_next,
 557                                  &conf->sc_tgts, sct_list) {
 558                 sptlrpc_rule_set_free(&conf_tgt->sct_rset);
 559                 list_del(&conf_tgt->sct_list);
 560                 OBD_FREE_PTR(conf_tgt);
 561         }
 562         LASSERT(list_empty(&conf->sc_tgts));
 563
 564         conf->sc_updated = 0;
 565         conf->sc_local = 0;
 566 }
 567
 568 static void sptlrpc_conf_free(struct sptlrpc_conf *conf)
 569 {
 570         CDEBUG(D_SEC, "free sptlrpc conf %s\n", conf->sc_fsname);
 571
 572         sptlrpc_conf_free_rsets(conf);
 573         list_del(&conf->sc_list);
 574         OBD_FREE_PTR(conf);
 575 }
 576
 577 static
 578 struct sptlrpc_conf_tgt *sptlrpc_conf_get_tgt(struct sptlrpc_conf *conf,
 579                                               const char *name,
 580                                               int create)
 581 {
 582         struct sptlrpc_conf_tgt *conf_tgt;
 583
 584         list_for_each_entry(conf_tgt, &conf->sc_tgts, sct_list) {
 585                 if (strcmp(conf_tgt->sct_name, name) == 0)
 586                         return conf_tgt;
 587         }
 588
 589         if (!create)
 590                 return NULL;
 591
 592         OBD_ALLOC_PTR(conf_tgt);
 593         if (conf_tgt) {
 594                 strlcpy(conf_tgt->sct_name, name, sizeof(conf_tgt->sct_name));
 595                 sptlrpc_rule_set_init(&conf_tgt->sct_rset);
 596                 list_add(&conf_tgt->sct_list, &conf->sc_tgts);
 597         }
 598
 599         return conf_tgt;
 600 }
 601
 602 static
 603 struct sptlrpc_conf *sptlrpc_conf_get(const char *fsname,
 604                                       int create)
 605 {
 606         struct sptlrpc_conf *conf;
 607
 608         list_for_each_entry(conf, &sptlrpc_confs, sc_list) {
 609                 if (strcmp(conf->sc_fsname, fsname) == 0)
 610                         return conf;
 611         }
 612
 613         if (!create)
 614                 return NULL;
 615
 616         OBD_ALLOC_PTR(conf);
 617         if (conf == NULL)
 618                 return NULL;
 619
 620         if (strlcpy(conf->sc_fsname, fsname, sizeof(conf->sc_fsname)) >=
 621             sizeof(conf->sc_fsname)) {
 622                 OBD_FREE_PTR(conf);
 623                 return NULL;
 624         }
 625         sptlrpc_rule_set_init(&conf->sc_rset);
 626         INIT_LIST_HEAD(&conf->sc_tgts);
 627         list_add(&conf->sc_list, &sptlrpc_confs);
 628
 629         CDEBUG(D_SEC, "create sptlrpc conf %s\n", conf->sc_fsname);
 630         return conf;
 631 }
 632
 633 /**
 634  * caller must hold conf_lock already.
 635  */
 636 static int sptlrpc_conf_merge_rule(struct sptlrpc_conf *conf,
 637                                    const char *target,
 638                                    struct sptlrpc_rule *rule)
 639 {
 640         struct sptlrpc_conf_tgt  *conf_tgt;
 641         struct sptlrpc_rule_set  *rule_set;
 642
 643         /* fsname == target means general rules for the whole fs */
 644         if (strcmp(conf->sc_fsname, target) == 0) {
 645                 rule_set = &conf->sc_rset;
 646         } else {
 647                 conf_tgt = sptlrpc_conf_get_tgt(conf, target, 1);
 648                 if (conf_tgt) {
 649                         rule_set = &conf_tgt->sct_rset;
 650                 } else {
 651                         CERROR("out of memory, can't merge rule!\n");
 652                         return -ENOMEM;
 653                 }
 654         }
 655
 656         return sptlrpc_rule_set_merge(rule_set, rule);
 657 }
 658
 659 /**
 660  * process one LCFG_SPTLRPC_CONF record. if \a conf is NULL, we
 661  * find one through the target name in the record inside conf_lock;
 662  * otherwise means caller already hold conf_lock.
 663  */
 664 static int __sptlrpc_process_config(struct lustre_cfg *lcfg,
 665                                     struct sptlrpc_conf *conf)
 666 {
 667         char                   *target, *param;
 668         char                    fsname[MTI_NAME_MAXLEN];
 669         struct sptlrpc_rule     rule;
 670         int                     rc;
 671         ENTRY;
 672
 673         target = lustre_cfg_string(lcfg, 1);
 674         if (target == NULL) {
 675                 CERROR("missing target name\n");
 676                 RETURN(-EINVAL);
 677         }
 678
 679         param = lustre_cfg_string(lcfg, 2);
 680         if (param == NULL) {
 681                 CERROR("missing parameter\n");
 682                 RETURN(-EINVAL);
 683         }
 684
 685         CDEBUG(D_SEC, "processing rule: %s.%s\n", target, param);
 686
 687         /* parse rule to make sure the format is correct */
 688         if (strncmp(param, PARAM_SRPC_FLVR, sizeof(PARAM_SRPC_FLVR) - 1) != 0) {
 689                 CERROR("Invalid sptlrpc parameter: %s\n", param);
 690                 RETURN(-EINVAL);
 691         }
 692         param += sizeof(PARAM_SRPC_FLVR) - 1;
 693
 694         rc = sptlrpc_parse_rule(param, &rule);
 695         if (rc)
 696                 RETURN(-EINVAL);
 697
 698         if (conf == NULL) {
 699                 obdname2fsname(target, fsname, sizeof(fsname));
 700
 701                 mutex_lock(&sptlrpc_conf_lock);
 702                 conf = sptlrpc_conf_get(fsname, 0);
 703                 if (conf == NULL) {
 704                         CERROR("can't find conf\n");
 705                         rc = -ENOMEM;
 706                 } else {
 707                         rc = sptlrpc_conf_merge_rule(conf, target, &rule);
 708                 }
 709                 mutex_unlock(&sptlrpc_conf_lock);
 710         } else {
 711                 LASSERT(mutex_is_locked(&sptlrpc_conf_lock));
 712                 rc = sptlrpc_conf_merge_rule(conf, target, &rule);
 713         }
 714
 715         if (rc == 0)
 716                 conf->sc_modified++;
 717
 718         RETURN(rc);
 719 }
 720
 721 int sptlrpc_process_config(struct lustre_cfg *lcfg)
 722 {
 723         return __sptlrpc_process_config(lcfg, NULL);
 724 }
 725 EXPORT_SYMBOL(sptlrpc_process_config);
 726
 727 static int logname2fsname(const char *logname, char *buf, int buflen)
 728 {
 729         char   *ptr;
 730         int     len;
 731
 732         ptr = strrchr(logname, '-');
 733         if (ptr == NULL || strcmp(ptr, "-sptlrpc")) {
 734                 CERROR("%s is not a sptlrpc config log\n", logname);
 735                 return -EINVAL;
 736         }
 737
 738         len = min((int) (ptr - logname), buflen - 1);
 739
 740         memcpy(buf, logname, len);
 741         buf[len] = '\0';
 742         return 0;
 743 }
 744
 745 void sptlrpc_conf_log_update_begin(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                 if (conf->sc_local) {
 758                         LASSERT(conf->sc_updated == 0);
 759                         sptlrpc_conf_free_rsets(conf);
 760                 }
 761                 conf->sc_modified = 0;
 762         }
 763
 764         mutex_unlock(&sptlrpc_conf_lock);
 765 }
 766 EXPORT_SYMBOL(sptlrpc_conf_log_update_begin);
 767
 768 /**
 769  * mark a config log has been updated
 770  */
 771 void sptlrpc_conf_log_update_end(const char *logname)
 772 {
 773         struct sptlrpc_conf *conf;
 774         char                 fsname[16];
 775
 776         if (logname2fsname(logname, fsname, sizeof(fsname)))
 777                 return;
 778
 779         mutex_lock(&sptlrpc_conf_lock);
 780
 781         conf = sptlrpc_conf_get(fsname, 0);
 782         if (conf) {
 783                 /*
 784                  * if original state is not updated, make sure the
 785                  * modified counter > 0 to enforce updating local copy.
 786                  */
 787                 if (conf->sc_updated == 0)
 788                         conf->sc_modified++;
 789
 790                 conf->sc_updated = 1;
 791         }
 792
 793         mutex_unlock(&sptlrpc_conf_lock);
 794 }
 795 EXPORT_SYMBOL(sptlrpc_conf_log_update_end);
 796
 797 void sptlrpc_conf_log_start(const char *logname)
 798 {
 799         char                 fsname[16];
 800
 801         if (logname2fsname(logname, fsname, sizeof(fsname)))
 802                 return;
 803
 804         mutex_lock(&sptlrpc_conf_lock);
 805         sptlrpc_conf_get(fsname, 1);
 806         mutex_unlock(&sptlrpc_conf_lock);
 807 }
 808 EXPORT_SYMBOL(sptlrpc_conf_log_start);
 809
 810 void sptlrpc_conf_log_stop(const char *logname)
 811 {
 812         struct sptlrpc_conf *conf;
 813         char                 fsname[16];
 814
 815         if (logname2fsname(logname, fsname, sizeof(fsname)))
 816                 return;
 817
 818         mutex_lock(&sptlrpc_conf_lock);
 819         conf = sptlrpc_conf_get(fsname, 0);
 820         if (conf)
 821                 sptlrpc_conf_free(conf);
 822         mutex_unlock(&sptlrpc_conf_lock);
 823 }
 824 EXPORT_SYMBOL(sptlrpc_conf_log_stop);
 825
 826 static void inline flavor_set_flags(struct sptlrpc_flavor *sf,
 827                                     enum lustre_sec_part from,
 828                                     enum lustre_sec_part to,
 829                                     unsigned int fl_udesc)
 830 {
 831         /*
 832          * null flavor doesn't need to set any flavor, and in fact
 833          * we'd better not do that because everybody share a single sec.
 834          */
 835         if (sf->sf_rpc == SPTLRPC_FLVR_NULL)
 836                 return;
 837
 838         if (from == LUSTRE_SP_MDT) {
 839                 /* MDT->MDT; MDT->OST */
 840                 sf->sf_flags |= PTLRPC_SEC_FL_ROOTONLY;
 841         } else if (from == LUSTRE_SP_CLI && to == LUSTRE_SP_OST) {
 842                 /* CLI->OST */
 843                 sf->sf_flags |= PTLRPC_SEC_FL_ROOTONLY | PTLRPC_SEC_FL_BULK;
 844         } else if (from == LUSTRE_SP_CLI && to == LUSTRE_SP_MDT) {
 845                 /* CLI->MDT */
 846                 if (fl_udesc && sf->sf_rpc != SPTLRPC_FLVR_NULL)
 847                         sf->sf_flags |= PTLRPC_SEC_FL_UDESC;
 848         }
 849
 850         /* Some flavors use a single uid (0) context */
 851         if (flvr_is_rootonly(sf->sf_rpc))
 852                 sf->sf_flags |= PTLRPC_SEC_FL_ROOTONLY;
 853
 854         /* User descriptor might need to be cleared */
 855         if (flvr_allows_user_desc(sf->sf_rpc) == 0)
 856                 sf->sf_flags &= ~PTLRPC_SEC_FL_UDESC;
 857 }
 858
 859 void sptlrpc_conf_choose_flavor(enum lustre_sec_part from,
 860                                 enum lustre_sec_part to,
 861                                 struct obd_uuid *target,
 862                                 lnet_nid_t nid,
 863                                 struct sptlrpc_flavor *sf)
 864 {
 865         struct sptlrpc_conf     *conf;
 866         struct sptlrpc_conf_tgt *conf_tgt;
 867         char                     name[MTI_NAME_MAXLEN];
 868         int                      len, rc = 0;
 869
 870         obd_uuid2fsname(name, target->uuid, sizeof(name));
 871
 872         mutex_lock(&sptlrpc_conf_lock);
 873
 874         conf = sptlrpc_conf_get(name, 0);
 875         if (conf == NULL)
 876                 goto out;
 877
 878         /* convert uuid name (supposed end with _UUID) to target name */
 879         len = strlen(target->uuid);
 880         LASSERT(len > 5);
 881         memcpy(name, target->uuid, len - 5);
 882         name[len - 5] = '\0';
 883
 884         conf_tgt = sptlrpc_conf_get_tgt(conf, name, 0);
 885         if (conf_tgt) {
 886                 rc = sptlrpc_rule_set_choose(&conf_tgt->sct_rset,
 887                                              from, to, nid, sf);
 888                 if (rc)
 889                         goto out;
 890         }
 891
 892         rc = sptlrpc_rule_set_choose(&conf->sc_rset, from, to, nid, sf);
 893 out:
 894         mutex_unlock(&sptlrpc_conf_lock);
 895
 896         if (rc == 0)
 897                 get_default_flavor(sf);
 898
 899         flavor_set_flags(sf, from, to, 1);
 900 }
 901
 902 /**
 903  * called by target devices, determine the expected flavor from
 904  * certain peer (from, nid).
 905  */
 906 void sptlrpc_target_choose_flavor(struct sptlrpc_rule_set *rset,
 907                                   enum lustre_sec_part from,
 908                                   lnet_nid_t nid,
 909                                   struct sptlrpc_flavor *sf)
 910 {
 911         if (sptlrpc_rule_set_choose(rset, from, LUSTRE_SP_ANY, nid, sf) == 0)
 912                 get_default_flavor(sf);
 913 }
 914
 915 #define SEC_ADAPT_DELAY         (10)
 916
 917 /**
 918  * called by client devices, notify the sptlrpc config has changed and
 919  * do import_sec_adapt later.
 920  */
 921 void sptlrpc_conf_client_adapt(struct obd_device *obd)
 922 {
 923         struct obd_import  *imp;
 924         ENTRY;
 925
 926         LASSERT(strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0 ||
 927                 strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME) == 0 ||
 928                 strcmp(obd->obd_type->typ_name, LUSTRE_OSP_NAME) == 0 ||
 929                 strcmp(obd->obd_type->typ_name, LUSTRE_LWP_NAME) == 0);
 930         CDEBUG(D_SEC, "obd %s\n", obd->u.cli.cl_target_uuid.uuid);
 931
 932         /* serialize with connect/disconnect import */
 933         down_read_nested(&obd->u.cli.cl_sem, OBD_CLI_SEM_MDCOSC);
 934
 935         imp = obd->u.cli.cl_import;
 936         if (imp) {
 937                 spin_lock(&imp->imp_lock);
 938                 if (imp->imp_sec)
 939                         imp->imp_sec_expire = ktime_get_real_seconds() +
 940                                 SEC_ADAPT_DELAY;
 941                 spin_unlock(&imp->imp_lock);
 942         }
 943
 944         up_read(&obd->u.cli.cl_sem);
 945         EXIT;
 946 }
 947 EXPORT_SYMBOL(sptlrpc_conf_client_adapt);
 948
 949 /**
 950  * called by target devices, extract sptlrpc rules which applies to
 951  * this target, to be used for future rpc flavor checking.
 952  */
 953 int sptlrpc_conf_target_get_rules(struct obd_device *obd,
 954                                   struct sptlrpc_rule_set *rset)
 955 {
 956         struct sptlrpc_conf *conf;
 957         struct sptlrpc_conf_tgt *conf_tgt;
 958         enum lustre_sec_part sp_dst;
 959         char fsname[MTI_NAME_MAXLEN];
 960         int rc = 0;
 961         ENTRY;
 962
 963         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDT_NAME) == 0) {
 964                 sp_dst = LUSTRE_SP_MDT;
 965         } else if (strcmp(obd->obd_type->typ_name, LUSTRE_OST_NAME) == 0) {
 966                 sp_dst = LUSTRE_SP_OST;
 967         } else {
 968                 CERROR("unexpected obd type %s\n", obd->obd_type->typ_name);
 969                 RETURN(-EINVAL);
 970         }
 971
 972         obd_uuid2fsname(fsname, obd->obd_uuid.uuid, sizeof(fsname));
 973
 974         mutex_lock(&sptlrpc_conf_lock);
 975         conf = sptlrpc_conf_get(fsname, 0);
 976         if (conf == NULL) {
 977                 CERROR("missing sptlrpc config log\n");
 978                 rc = -EFAULT;
 979         } else {
 980                 /* extract rule set for this target */
 981                 conf_tgt = sptlrpc_conf_get_tgt(conf, obd->obd_name, 0);
 982
 983                 rc = sptlrpc_rule_set_extract(&conf->sc_rset,
 984                                       conf_tgt ? &conf_tgt->sct_rset : NULL,
 985                                       LUSTRE_SP_ANY, sp_dst, rset);
 986         }
 987         mutex_unlock(&sptlrpc_conf_lock);
 988
 989         RETURN(rc);
 990 }
 991
 992 int  sptlrpc_conf_init(void)
 993 {
 994         INIT_LIST_HEAD(&sptlrpc_confs);
 995         mutex_init(&sptlrpc_conf_lock);
 996         return 0;
 997 }
 998
 999 void sptlrpc_conf_fini(void)
1000 {
1001         struct sptlrpc_conf  *conf, *conf_next;
1002
1003         mutex_lock(&sptlrpc_conf_lock);
1004         list_for_each_entry_safe(conf, conf_next, &sptlrpc_confs, sc_list)
1005                 sptlrpc_conf_free(conf);
1006         LASSERT(list_empty(&sptlrpc_confs));
1007         mutex_unlock(&sptlrpc_conf_lock);
1008 }