drivers/staging/lustre/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, 2012, 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 "../../include/linux/libcfs/libcfs.h"
  40 #include <linux/crypto.h>
  41 #include <linux/key.h>
  42
  43 #include "../include/obd.h"
  44 #include "../include/obd_support.h"
  45 #include "../include/lustre_import.h"
  46 #include "../include/lustre_param.h"
  47 #include "../include/lustre_sec.h"
  48
  49 #include "ptlrpc_internal.h"
  50
  51 enum lustre_sec_part sptlrpc_target_sec_part(struct obd_device *obd)
  52 {
  53         const char *type = obd->obd_type->typ_name;
  54
  55         if (!strcmp(type, LUSTRE_MDT_NAME))
  56                 return LUSTRE_SP_MDT;
  57         if (!strcmp(type, LUSTRE_OST_NAME))
  58                 return LUSTRE_SP_OST;
  59         if (!strcmp(type, LUSTRE_MGS_NAME))
  60                 return LUSTRE_SP_MGS;
  61
  62         CERROR("unknown target %p(%s)\n", obd, type);
  63         return LUSTRE_SP_ANY;
  64 }
  65 EXPORT_SYMBOL(sptlrpc_target_sec_part);
  66
  67 /****************************************
  68  * user supplied flavor string parsing  *
  69  ****************************************/
  70
  71 /*
  72  * format: <base_flavor>[-<bulk_type:alg_spec>]
  73  */
  74 int sptlrpc_parse_flavor(const char *str, struct sptlrpc_flavor *flvr)
  75 {
  76         char buf[32];
  77         char *bulk, *alg;
  78
  79         memset(flvr, 0, sizeof(*flvr));
  80
  81         if (str == NULL || str[0] == '\0') {
  82                 flvr->sf_rpc = SPTLRPC_FLVR_INVALID;
  83                 return 0;
  84         }
  85
  86         strncpy(buf, str, sizeof(buf));
  87         buf[sizeof(buf) - 1] = '\0';
  88
  89         bulk = strchr(buf, '-');
  90         if (bulk)
  91                 *bulk++ = '\0';
  92
  93         flvr->sf_rpc = sptlrpc_name2flavor_base(buf);
  94         if (flvr->sf_rpc == SPTLRPC_FLVR_INVALID)
  95                 goto err_out;
  96
  97         /*
  98          * currently only base flavor "plain" can have bulk specification.
  99          */
 100         if (flvr->sf_rpc == SPTLRPC_FLVR_PLAIN) {
 101                 flvr->u_bulk.hash.hash_alg = BULK_HASH_ALG_ADLER32;
 102                 if (bulk) {
 103                         /*
 104                          * format: plain-hash:<hash_alg>
 105                          */
 106                         alg = strchr(bulk, ':');
 107                         if (alg == NULL)
 108                                 goto err_out;
 109                         *alg++ = '\0';
 110
 111                         if (strcmp(bulk, "hash"))
 112                                 goto err_out;
 113
 114                         flvr->u_bulk.hash.hash_alg = sptlrpc_get_hash_alg(alg);
 115                         if (flvr->u_bulk.hash.hash_alg >= BULK_HASH_ALG_MAX)
 116                                 goto err_out;
 117                 }
 118
 119                 if (flvr->u_bulk.hash.hash_alg == BULK_HASH_ALG_NULL)
 120                         flvr_set_bulk_svc(&flvr->sf_rpc, SPTLRPC_BULK_SVC_NULL);
 121                 else
 122                         flvr_set_bulk_svc(&flvr->sf_rpc, SPTLRPC_BULK_SVC_INTG);
 123         } else {
 124                 if (bulk)
 125                         goto err_out;
 126         }
 127
 128         flvr->sf_flags = 0;
 129         return 0;
 130
 131 err_out:
 132         CERROR("invalid flavor string: %s\n", str);
 133         return -EINVAL;
 134 }
 135 EXPORT_SYMBOL(sptlrpc_parse_flavor);
 136
 137 /****************************************
 138  * configure rules                    *
 139  ****************************************/
 140
 141 static void get_default_flavor(struct sptlrpc_flavor *sf)
 142 {
 143         memset(sf, 0, sizeof(*sf));
 144
 145         sf->sf_rpc = SPTLRPC_FLVR_NULL;
 146         sf->sf_flags = 0;
 147 }
 148
 149 static void sptlrpc_rule_init(struct sptlrpc_rule *rule)
 150 {
 151         rule->sr_netid = LNET_NIDNET(LNET_NID_ANY);
 152         rule->sr_from = LUSTRE_SP_ANY;
 153         rule->sr_to = LUSTRE_SP_ANY;
 154         rule->sr_padding = 0;
 155
 156         get_default_flavor(&rule->sr_flvr);
 157 }
 158
 159 /*
 160  * format: network[.direction]=flavor
 161  */
 162 int sptlrpc_parse_rule(char *param, struct sptlrpc_rule *rule)
 163 {
 164         char *flavor, *dir;
 165         int rc;
 166
 167         sptlrpc_rule_init(rule);
 168
 169         flavor = strchr(param, '=');
 170         if (flavor == NULL) {
 171                 CERROR("invalid param, no '='\n");
 172                 return -EINVAL;
 173         }
 174         *flavor++ = '\0';
 175
 176         dir = strchr(param, '.');
 177         if (dir)
 178                 *dir++ = '\0';
 179
 180         /* 1.1 network */
 181         if (strcmp(param, "default")) {
 182                 rule->sr_netid = libcfs_str2net(param);
 183                 if (rule->sr_netid == LNET_NIDNET(LNET_NID_ANY)) {
 184                         CERROR("invalid network name: %s\n", param);
 185                         return -EINVAL;
 186                 }
 187         }
 188
 189         /* 1.2 direction */
 190         if (dir) {
 191                 if (!strcmp(dir, "mdt2ost")) {
 192                         rule->sr_from = LUSTRE_SP_MDT;
 193                         rule->sr_to = LUSTRE_SP_OST;
 194                 } else if (!strcmp(dir, "mdt2mdt")) {
 195                         rule->sr_from = LUSTRE_SP_MDT;
 196                         rule->sr_to = LUSTRE_SP_MDT;
 197                 } else if (!strcmp(dir, "cli2ost")) {
 198                         rule->sr_from = LUSTRE_SP_CLI;
 199                         rule->sr_to = LUSTRE_SP_OST;
 200                 } else if (!strcmp(dir, "cli2mdt")) {
 201                         rule->sr_from = LUSTRE_SP_CLI;
 202                         rule->sr_to = LUSTRE_SP_MDT;
 203                 } else {
 204                         CERROR("invalid rule dir segment: %s\n", dir);
 205                         return -EINVAL;
 206                 }
 207         }
 208
 209         /* 2.1 flavor */
 210         rc = sptlrpc_parse_flavor(flavor, &rule->sr_flvr);
 211         if (rc)
 212                 return -EINVAL;
 213
 214         return 0;
 215 }
 216 EXPORT_SYMBOL(sptlrpc_parse_rule);
 217
 218 void sptlrpc_rule_set_free(struct sptlrpc_rule_set *rset)
 219 {
 220         LASSERT(rset->srs_nslot ||
 221                 (rset->srs_nrule == 0 && rset->srs_rules == NULL));
 222
 223         if (rset->srs_nslot) {
 224                 kfree(rset->srs_rules);
 225                 sptlrpc_rule_set_init(rset);
 226         }
 227 }
 228 EXPORT_SYMBOL(sptlrpc_rule_set_free);
 229
 230 /*
 231  * return 0 if the rule set could accommodate one more rule.
 232  */
 233 int sptlrpc_rule_set_expand(struct sptlrpc_rule_set *rset)
 234 {
 235         struct sptlrpc_rule *rules;
 236         int nslot;
 237
 238         might_sleep();
 239
 240         if (rset->srs_nrule < rset->srs_nslot)
 241                 return 0;
 242
 243         nslot = rset->srs_nslot + 8;
 244
 245         /* better use realloc() if available */
 246         rules = kcalloc(nslot, sizeof(*rset->srs_rules), GFP_NOFS);
 247         if (rules == NULL)
 248                 return -ENOMEM;
 249
 250         if (rset->srs_nrule) {
 251                 LASSERT(rset->srs_nslot && rset->srs_rules);
 252                 memcpy(rules, rset->srs_rules,
 253                        rset->srs_nrule * sizeof(*rset->srs_rules));
 254
 255                 kfree(rset->srs_rules);
 256         }
 257
 258         rset->srs_rules = rules;
 259         rset->srs_nslot = nslot;
 260         return 0;
 261 }
 262 EXPORT_SYMBOL(sptlrpc_rule_set_expand);
 263
 264 static inline int rule_spec_dir(struct sptlrpc_rule *rule)
 265 {
 266         return (rule->sr_from != LUSTRE_SP_ANY ||
 267                 rule->sr_to != LUSTRE_SP_ANY);
 268 }
 269 static inline int rule_spec_net(struct sptlrpc_rule *rule)
 270 {
 271         return (rule->sr_netid != LNET_NIDNET(LNET_NID_ANY));
 272 }
 273 static inline int rule_match_dir(struct sptlrpc_rule *r1,
 274                                  struct sptlrpc_rule *r2)
 275 {
 276         return (r1->sr_from == r2->sr_from && r1->sr_to == r2->sr_to);
 277 }
 278 static inline int rule_match_net(struct sptlrpc_rule *r1,
 279                                  struct sptlrpc_rule *r2)
 280 {
 281         return (r1->sr_netid == r2->sr_netid);
 282 }
 283
 284 /*
 285  * merge @rule into @rset.
 286  * the @rset slots might be expanded.
 287  */
 288 int sptlrpc_rule_set_merge(struct sptlrpc_rule_set *rset,
 289                            struct sptlrpc_rule *rule)
 290 {
 291         struct sptlrpc_rule *p = rset->srs_rules;
 292         int spec_dir, spec_net;
 293         int rc, n, match = 0;
 294
 295         might_sleep();
 296
 297         spec_net = rule_spec_net(rule);
 298         spec_dir = rule_spec_dir(rule);
 299
 300         for (n = 0; n < rset->srs_nrule; n++) {
 301                 p = &rset->srs_rules[n];
 302
 303                 /* test network match, if failed:
 304                  * - spec rule: skip rules which is also spec rule match, until
 305                  *   we hit a wild rule, which means no more chance
 306                  * - wild rule: skip until reach the one which is also wild
 307                  *   and matches
 308                  */
 309                 if (!rule_match_net(p, rule)) {
 310                         if (spec_net) {
 311                                 if (rule_spec_net(p))
 312                                         continue;
 313                                 else
 314                                         break;
 315                         } else {
 316                                 continue;
 317                         }
 318                 }
 319
 320                 /* test dir match, same logic as net matching */
 321                 if (!rule_match_dir(p, rule)) {
 322                         if (spec_dir) {
 323                                 if (rule_spec_dir(p))
 324                                         continue;
 325                                 else
 326                                         break;
 327                         } else {
 328                                 continue;
 329                         }
 330                 }
 331
 332                 /* find a match */
 333                 match = 1;
 334                 break;
 335         }
 336
 337         if (match) {
 338                 LASSERT(n >= 0 && n < rset->srs_nrule);
 339
 340                 if (rule->sr_flvr.sf_rpc == SPTLRPC_FLVR_INVALID) {
 341                         /* remove this rule */
 342                         if (n < rset->srs_nrule - 1)
 343                                 memmove(&rset->srs_rules[n],
 344                                         &rset->srs_rules[n + 1],
 345                                         (rset->srs_nrule - n - 1) *
 346                                         sizeof(*rule));
 347                         rset->srs_nrule--;
 348                 } else {
 349                         /* override the rule */
 350                         memcpy(&rset->srs_rules[n], rule, sizeof(*rule));
 351                 }
 352         } else {
 353                 LASSERT(n >= 0 && n <= rset->srs_nrule);
 354
 355                 if (rule->sr_flvr.sf_rpc != SPTLRPC_FLVR_INVALID) {
 356                         rc = sptlrpc_rule_set_expand(rset);
 357                         if (rc)
 358                                 return rc;
 359
 360                         if (n < rset->srs_nrule)
 361                                 memmove(&rset->srs_rules[n + 1],
 362                                         &rset->srs_rules[n],
 363                                         (rset->srs_nrule - n) * sizeof(*rule));
 364                         memcpy(&rset->srs_rules[n], rule, sizeof(*rule));
 365                         rset->srs_nrule++;
 366                 } else {
 367                         CDEBUG(D_CONFIG, "ignore the unmatched deletion\n");
 368                 }
 369         }
 370
 371         return 0;
 372 }
 373 EXPORT_SYMBOL(sptlrpc_rule_set_merge);
 374
 375 /**
 376  * given from/to/nid, determine a matching flavor in ruleset.
 377  * return 1 if a match found, otherwise return 0.
 378  */
 379 int sptlrpc_rule_set_choose(struct sptlrpc_rule_set *rset,
 380                             enum lustre_sec_part from,
 381                             enum lustre_sec_part to,
 382                             lnet_nid_t nid,
 383                             struct sptlrpc_flavor *sf)
 384 {
 385         struct sptlrpc_rule *r;
 386         int n;
 387
 388         for (n = 0; n < rset->srs_nrule; n++) {
 389                 r = &rset->srs_rules[n];
 390
 391                 if (LNET_NIDNET(nid) != LNET_NIDNET(LNET_NID_ANY) &&
 392                     r->sr_netid != LNET_NIDNET(LNET_NID_ANY) &&
 393                     LNET_NIDNET(nid) != r->sr_netid)
 394                         continue;
 395
 396                 if (from != LUSTRE_SP_ANY && r->sr_from != LUSTRE_SP_ANY &&
 397                     from != r->sr_from)
 398                         continue;
 399
 400                 if (to != LUSTRE_SP_ANY && r->sr_to != LUSTRE_SP_ANY &&
 401                     to != r->sr_to)
 402                         continue;
 403
 404                 *sf = r->sr_flvr;
 405                 return 1;
 406         }
 407
 408         return 0;
 409 }
 410 EXPORT_SYMBOL(sptlrpc_rule_set_choose);
 411
 412 /**********************************
 413  * sptlrpc configuration support  *
 414  **********************************/
 415
 416 struct sptlrpc_conf_tgt {
 417         struct list_head              sct_list;
 418         char                sct_name[MAX_OBD_NAME];
 419         struct sptlrpc_rule_set sct_rset;
 420 };
 421
 422 struct sptlrpc_conf {
 423         struct list_head              sc_list;
 424         char                sc_fsname[MTI_NAME_MAXLEN];
 425         unsigned int        sc_modified;  /* modified during updating */
 426         unsigned int        sc_updated:1, /* updated copy from MGS */
 427                                 sc_local:1;   /* local copy from target */
 428         struct sptlrpc_rule_set sc_rset;      /* fs general rules */
 429         struct list_head              sc_tgts;      /* target-specific rules */
 430 };
 431
 432 static struct mutex sptlrpc_conf_lock;
 433 static LIST_HEAD(sptlrpc_confs);
 434
 435 static inline int is_hex(char c)
 436 {
 437         return ((c >= '0' && c <= '9') ||
 438                 (c >= 'a' && c <= 'f'));
 439 }
 440
 441 static void target2fsname(const char *tgt, char *fsname, int buflen)
 442 {
 443         const char *ptr;
 444         int len;
 445
 446         ptr = strrchr(tgt, '-');
 447         if (ptr) {
 448                 if ((strncmp(ptr, "-MDT", 4) != 0 &&
 449                      strncmp(ptr, "-OST", 4) != 0) ||
 450                     !is_hex(ptr[4]) || !is_hex(ptr[5]) ||
 451                     !is_hex(ptr[6]) || !is_hex(ptr[7]))
 452                         ptr = NULL;
 453         }
 454
 455         /* if we didn't find the pattern, treat the whole string as fsname */
 456         if (ptr == NULL)
 457                 len = strlen(tgt);
 458         else
 459                 len = ptr - tgt;
 460
 461         len = min(len, buflen - 1);
 462         memcpy(fsname, tgt, len);
 463         fsname[len] = '\0';
 464 }
 465
 466 static void sptlrpc_conf_free_rsets(struct sptlrpc_conf *conf)
 467 {
 468         struct sptlrpc_conf_tgt *conf_tgt, *conf_tgt_next;
 469
 470         sptlrpc_rule_set_free(&conf->sc_rset);
 471
 472         list_for_each_entry_safe(conf_tgt, conf_tgt_next,
 473                                      &conf->sc_tgts, sct_list) {
 474                 sptlrpc_rule_set_free(&conf_tgt->sct_rset);
 475                 list_del(&conf_tgt->sct_list);
 476                 kfree(conf_tgt);
 477         }
 478         LASSERT(list_empty(&conf->sc_tgts));
 479
 480         conf->sc_updated = 0;
 481         conf->sc_local = 0;
 482 }
 483
 484 static void sptlrpc_conf_free(struct sptlrpc_conf *conf)
 485 {
 486         CDEBUG(D_SEC, "free sptlrpc conf %s\n", conf->sc_fsname);
 487
 488         sptlrpc_conf_free_rsets(conf);
 489         list_del(&conf->sc_list);
 490         kfree(conf);
 491 }
 492
 493 static
 494 struct sptlrpc_conf_tgt *sptlrpc_conf_get_tgt(struct sptlrpc_conf *conf,
 495                                               const char *name,
 496                                               int create)
 497 {
 498         struct sptlrpc_conf_tgt *conf_tgt;
 499
 500         list_for_each_entry(conf_tgt, &conf->sc_tgts, sct_list) {
 501                 if (strcmp(conf_tgt->sct_name, name) == 0)
 502                         return conf_tgt;
 503         }
 504
 505         if (!create)
 506                 return NULL;
 507
 508         conf_tgt = kzalloc(sizeof(*conf_tgt), GFP_NOFS);
 509         if (conf_tgt) {
 510                 strlcpy(conf_tgt->sct_name, name, sizeof(conf_tgt->sct_name));
 511                 sptlrpc_rule_set_init(&conf_tgt->sct_rset);
 512                 list_add(&conf_tgt->sct_list, &conf->sc_tgts);
 513         }
 514
 515         return conf_tgt;
 516 }
 517
 518 static
 519 struct sptlrpc_conf *sptlrpc_conf_get(const char *fsname,
 520                                       int create)
 521 {
 522         struct sptlrpc_conf *conf;
 523
 524         list_for_each_entry(conf, &sptlrpc_confs, sc_list) {
 525                 if (strcmp(conf->sc_fsname, fsname) == 0)
 526                         return conf;
 527         }
 528
 529         if (!create)
 530                 return NULL;
 531
 532         conf = kzalloc(sizeof(*conf), GFP_NOFS);
 533         if (!conf)
 534                 return NULL;
 535
 536         strcpy(conf->sc_fsname, fsname);
 537         sptlrpc_rule_set_init(&conf->sc_rset);
 538         INIT_LIST_HEAD(&conf->sc_tgts);
 539         list_add(&conf->sc_list, &sptlrpc_confs);
 540
 541         CDEBUG(D_SEC, "create sptlrpc conf %s\n", conf->sc_fsname);
 542         return conf;
 543 }
 544
 545 /**
 546  * caller must hold conf_lock already.
 547  */
 548 static int sptlrpc_conf_merge_rule(struct sptlrpc_conf *conf,
 549                                    const char *target,
 550                                    struct sptlrpc_rule *rule)
 551 {
 552         struct sptlrpc_conf_tgt *conf_tgt;
 553         struct sptlrpc_rule_set *rule_set;
 554
 555         /* fsname == target means general rules for the whole fs */
 556         if (strcmp(conf->sc_fsname, target) == 0) {
 557                 rule_set = &conf->sc_rset;
 558         } else {
 559                 conf_tgt = sptlrpc_conf_get_tgt(conf, target, 1);
 560                 if (conf_tgt) {
 561                         rule_set = &conf_tgt->sct_rset;
 562                 } else {
 563                         CERROR("out of memory, can't merge rule!\n");
 564                         return -ENOMEM;
 565                 }
 566         }
 567
 568         return sptlrpc_rule_set_merge(rule_set, rule);
 569 }
 570
 571 /**
 572  * process one LCFG_SPTLRPC_CONF record. if \a conf is NULL, we
 573  * find one through the target name in the record inside conf_lock;
 574  * otherwise means caller already hold conf_lock.
 575  */
 576 static int __sptlrpc_process_config(struct lustre_cfg *lcfg,
 577                                     struct sptlrpc_conf *conf)
 578 {
 579         char *target, *param;
 580         char fsname[MTI_NAME_MAXLEN];
 581         struct sptlrpc_rule rule;
 582         int rc;
 583
 584         target = lustre_cfg_string(lcfg, 1);
 585         if (target == NULL) {
 586                 CERROR("missing target name\n");
 587                 return -EINVAL;
 588         }
 589
 590         param = lustre_cfg_string(lcfg, 2);
 591         if (param == NULL) {
 592                 CERROR("missing parameter\n");
 593                 return -EINVAL;
 594         }
 595
 596         CDEBUG(D_SEC, "processing rule: %s.%s\n", target, param);
 597
 598         /* parse rule to make sure the format is correct */
 599         if (strncmp(param, PARAM_SRPC_FLVR, sizeof(PARAM_SRPC_FLVR) - 1) != 0) {
 600                 CERROR("Invalid sptlrpc parameter: %s\n", param);
 601                 return -EINVAL;
 602         }
 603         param += sizeof(PARAM_SRPC_FLVR) - 1;
 604
 605         rc = sptlrpc_parse_rule(param, &rule);
 606         if (rc)
 607                 return -EINVAL;
 608
 609         if (conf == NULL) {
 610                 target2fsname(target, fsname, sizeof(fsname));
 611
 612                 mutex_lock(&sptlrpc_conf_lock);
 613                 conf = sptlrpc_conf_get(fsname, 0);
 614                 if (conf == NULL) {
 615                         CERROR("can't find conf\n");
 616                         rc = -ENOMEM;
 617                 } else {
 618                         rc = sptlrpc_conf_merge_rule(conf, target, &rule);
 619                 }
 620                 mutex_unlock(&sptlrpc_conf_lock);
 621         } else {
 622                 LASSERT(mutex_is_locked(&sptlrpc_conf_lock));
 623                 rc = sptlrpc_conf_merge_rule(conf, target, &rule);
 624         }
 625
 626         if (rc == 0)
 627                 conf->sc_modified++;
 628
 629         return rc;
 630 }
 631
 632 int sptlrpc_process_config(struct lustre_cfg *lcfg)
 633 {
 634         return __sptlrpc_process_config(lcfg, NULL);
 635 }
 636 EXPORT_SYMBOL(sptlrpc_process_config);
 637
 638 static int logname2fsname(const char *logname, char *buf, int buflen)
 639 {
 640         char *ptr;
 641         int len;
 642
 643         ptr = strrchr(logname, '-');
 644         if (ptr == NULL || strcmp(ptr, "-sptlrpc")) {
 645                 CERROR("%s is not a sptlrpc config log\n", logname);
 646                 return -EINVAL;
 647         }
 648
 649         len = min((int) (ptr - logname), buflen - 1);
 650
 651         memcpy(buf, logname, len);
 652         buf[len] = '\0';
 653         return 0;
 654 }
 655
 656 void sptlrpc_conf_log_update_begin(const char *logname)
 657 {
 658         struct sptlrpc_conf *conf;
 659         char fsname[16];
 660
 661         if (logname2fsname(logname, fsname, sizeof(fsname)))
 662                 return;
 663
 664         mutex_lock(&sptlrpc_conf_lock);
 665
 666         conf = sptlrpc_conf_get(fsname, 0);
 667         if (conf) {
 668                 if (conf->sc_local) {
 669                         LASSERT(conf->sc_updated == 0);
 670                         sptlrpc_conf_free_rsets(conf);
 671                 }
 672                 conf->sc_modified = 0;
 673         }
 674
 675         mutex_unlock(&sptlrpc_conf_lock);
 676 }
 677 EXPORT_SYMBOL(sptlrpc_conf_log_update_begin);
 678
 679 /**
 680  * mark a config log has been updated
 681  */
 682 void sptlrpc_conf_log_update_end(const char *logname)
 683 {
 684         struct sptlrpc_conf *conf;
 685         char fsname[16];
 686
 687         if (logname2fsname(logname, fsname, sizeof(fsname)))
 688                 return;
 689
 690         mutex_lock(&sptlrpc_conf_lock);
 691
 692         conf = sptlrpc_conf_get(fsname, 0);
 693         if (conf) {
 694                 /*
 695                  * if original state is not updated, make sure the
 696                  * modified counter > 0 to enforce updating local copy.
 697                  */
 698                 if (conf->sc_updated == 0)
 699                         conf->sc_modified++;
 700
 701                 conf->sc_updated = 1;
 702         }
 703
 704         mutex_unlock(&sptlrpc_conf_lock);
 705 }
 706 EXPORT_SYMBOL(sptlrpc_conf_log_update_end);
 707
 708 void sptlrpc_conf_log_start(const char *logname)
 709 {
 710         char fsname[16];
 711
 712         if (logname2fsname(logname, fsname, sizeof(fsname)))
 713                 return;
 714
 715         mutex_lock(&sptlrpc_conf_lock);
 716         sptlrpc_conf_get(fsname, 1);
 717         mutex_unlock(&sptlrpc_conf_lock);
 718 }
 719 EXPORT_SYMBOL(sptlrpc_conf_log_start);
 720
 721 void sptlrpc_conf_log_stop(const char *logname)
 722 {
 723         struct sptlrpc_conf *conf;
 724         char fsname[16];
 725
 726         if (logname2fsname(logname, fsname, sizeof(fsname)))
 727                 return;
 728
 729         mutex_lock(&sptlrpc_conf_lock);
 730         conf = sptlrpc_conf_get(fsname, 0);
 731         if (conf)
 732                 sptlrpc_conf_free(conf);
 733         mutex_unlock(&sptlrpc_conf_lock);
 734 }
 735 EXPORT_SYMBOL(sptlrpc_conf_log_stop);
 736
 737 static inline void flavor_set_flags(struct sptlrpc_flavor *sf,
 738                                     enum lustre_sec_part from,
 739                                     enum lustre_sec_part to,
 740                                     unsigned int fl_udesc)
 741 {
 742         /*
 743          * null flavor doesn't need to set any flavor, and in fact
 744          * we'd better not do that because everybody share a single sec.
 745          */
 746         if (sf->sf_rpc == SPTLRPC_FLVR_NULL)
 747                 return;
 748
 749         if (from == LUSTRE_SP_MDT) {
 750                 /* MDT->MDT; MDT->OST */
 751                 sf->sf_flags |= PTLRPC_SEC_FL_ROOTONLY;
 752         } else if (from == LUSTRE_SP_CLI && to == LUSTRE_SP_OST) {
 753                 /* CLI->OST */
 754                 sf->sf_flags |= PTLRPC_SEC_FL_ROOTONLY | PTLRPC_SEC_FL_BULK;
 755         } else if (from == LUSTRE_SP_CLI && to == LUSTRE_SP_MDT) {
 756                 /* CLI->MDT */
 757                 if (fl_udesc && sf->sf_rpc != SPTLRPC_FLVR_NULL)
 758                         sf->sf_flags |= PTLRPC_SEC_FL_UDESC;
 759         }
 760 }
 761
 762 void sptlrpc_conf_choose_flavor(enum lustre_sec_part from,
 763                                 enum lustre_sec_part to,
 764                                 struct obd_uuid *target,
 765                                 lnet_nid_t nid,
 766                                 struct sptlrpc_flavor *sf)
 767 {
 768         struct sptlrpc_conf *conf;
 769         struct sptlrpc_conf_tgt *conf_tgt;
 770         char name[MTI_NAME_MAXLEN];
 771         int len, rc = 0;
 772
 773         target2fsname(target->uuid, name, sizeof(name));
 774
 775         mutex_lock(&sptlrpc_conf_lock);
 776
 777         conf = sptlrpc_conf_get(name, 0);
 778         if (conf == NULL)
 779                 goto out;
 780
 781         /* convert uuid name (supposed end with _UUID) to target name */
 782         len = strlen(target->uuid);
 783         LASSERT(len > 5);
 784         memcpy(name, target->uuid, len - 5);
 785         name[len - 5] = '\0';
 786
 787         conf_tgt = sptlrpc_conf_get_tgt(conf, name, 0);
 788         if (conf_tgt) {
 789                 rc = sptlrpc_rule_set_choose(&conf_tgt->sct_rset,
 790                                              from, to, nid, sf);
 791                 if (rc)
 792                         goto out;
 793         }
 794
 795         rc = sptlrpc_rule_set_choose(&conf->sc_rset, from, to, nid, sf);
 796 out:
 797         mutex_unlock(&sptlrpc_conf_lock);
 798
 799         if (rc == 0)
 800                 get_default_flavor(sf);
 801
 802         flavor_set_flags(sf, from, to, 1);
 803 }
 804
 805 #define SEC_ADAPT_DELAY  (10)
 806
 807 /**
 808  * called by client devices, notify the sptlrpc config has changed and
 809  * do import_sec_adapt later.
 810  */
 811 void sptlrpc_conf_client_adapt(struct obd_device *obd)
 812 {
 813         struct obd_import *imp;
 814
 815         LASSERT(strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0 ||
 816                 strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME) == 0);
 817         CDEBUG(D_SEC, "obd %s\n", obd->u.cli.cl_target_uuid.uuid);
 818
 819         /* serialize with connect/disconnect import */
 820         down_read(&obd->u.cli.cl_sem);
 821
 822         imp = obd->u.cli.cl_import;
 823         if (imp) {
 824                 spin_lock(&imp->imp_lock);
 825                 if (imp->imp_sec)
 826                         imp->imp_sec_expire = ktime_get_real_seconds() +
 827                                 SEC_ADAPT_DELAY;
 828                 spin_unlock(&imp->imp_lock);
 829         }
 830
 831         up_read(&obd->u.cli.cl_sem);
 832 }
 833 EXPORT_SYMBOL(sptlrpc_conf_client_adapt);
 834
 835 int sptlrpc_conf_init(void)
 836 {
 837         mutex_init(&sptlrpc_conf_lock);
 838         return 0;
 839 }
 840
 841 void sptlrpc_conf_fini(void)
 842 {
 843         struct sptlrpc_conf *conf, *conf_next;
 844
 845         mutex_lock(&sptlrpc_conf_lock);
 846         list_for_each_entry_safe(conf, conf_next, &sptlrpc_confs, sc_list) {
 847                 sptlrpc_conf_free(conf);
 848         }
 849         LASSERT(list_empty(&sptlrpc_confs));
 850         mutex_unlock(&sptlrpc_conf_lock);
 851 }