lustre/mgs/mgs_llog.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/mgs/mgs_llog.c
  37  *
  38  * Lustre Management Server (mgs) config llog creation
  39  *
  40  * Author: Nathan Rutman <nathan@clusterfs.com>
  41  */
  42
  43 #ifndef EXPORT_SYMTAB
  44 #define EXPORT_SYMTAB
  45 #endif
  46 #define DEBUG_SUBSYSTEM S_MGS
  47 #define D_MGS D_CONFIG /*|D_WARNING*/
  48
  49 #ifdef __KERNEL__
  50 #include <linux/module.h>
  51 #include <linux/pagemap.h>
  52 #include <linux/fs.h>
  53 #endif
  54
  55 #include <obd.h>
  56 #include <obd_lov.h>
  57 #include <obd_class.h>
  58 #include <lustre_log.h>
  59 #include <obd_ost.h>
  60 #include <libcfs/list.h>
  61 #include <linux/lvfs.h>
  62 #include <lustre_fsfilt.h>
  63 #include <lustre_disk.h>
  64 #include <lustre_param.h>
  65 #include <lustre_sec.h>
  66 #include "mgs_internal.h"
  67
  68 /********************** Class functions ********************/
  69
  70 /* Caller must list_del and OBD_FREE each dentry from the list */
  71 int class_dentry_readdir(struct obd_device *obd, struct dentry *dir,
  72                                 struct vfsmount *inmnt,
  73                                 struct list_head *dentry_list){
  74         /* see mds_cleanup_pending */
  75         struct lvfs_run_ctxt saved;
  76         struct file *file;
  77         struct dentry *dentry;
  78         struct vfsmount *mnt;
  79         int rc = 0;
  80         ENTRY;
  81
  82         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
  83         dentry = dget(dir);
  84         if (IS_ERR(dentry))
  85                 GOTO(out_pop, rc = PTR_ERR(dentry));
  86         mnt = mntget(inmnt);
  87         if (IS_ERR(mnt)) {
  88                 l_dput(dentry);
  89                 GOTO(out_pop, rc = PTR_ERR(mnt));
  90         }
  91
  92         file = dentry_open(dentry, mnt, O_RDONLY);
  93         if (IS_ERR(file))
  94                 /* dentry_open_it() drops the dentry, mnt refs */
  95                 GOTO(out_pop, rc = PTR_ERR(file));
  96
  97         CFS_INIT_LIST_HEAD(dentry_list);
  98         rc = l_readdir(file, dentry_list);
  99         filp_close(file, 0);
 100         /*  filp_close->fput() drops the dentry, mnt refs */
 101
 102 out_pop:
 103         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 104         RETURN(rc);
 105 }
 106
 107 /******************** DB functions *********************/
 108
 109 static inline int name_create(char **newname, char *prefix, char *suffix)
 110 {
 111         LASSERT(newname);
 112         OBD_ALLOC(*newname, strlen(prefix) + strlen(suffix) + 1);
 113         if (!*newname)
 114                 return -ENOMEM;
 115         sprintf(*newname, "%s%s", prefix, suffix);
 116         return 0;
 117 }
 118
 119 static inline void name_destroy(char **name)
 120 {
 121         if (*name)
 122                 OBD_FREE(*name, strlen(*name) + 1);
 123         *name = NULL;
 124 }
 125
 126 /* from the (client) config log, figure out:
 127         1. which ost's/mdt's are configured (by index)
 128         2. what the last config step is
 129         3. COMPAT_146 lov name
 130         4. COMPAT_146 mdt lov name
 131         5. COMPAT_146 mdc name
 132 */
 133 /* It might be better to have a separate db file, instead of parsing the info
 134    out of the client log.  This is slow and potentially error-prone. */
 135 static int mgs_fsdb_handler(struct llog_handle *llh, struct llog_rec_hdr *rec,
 136                             void *data)
 137 {
 138         struct fs_db *fsdb = (struct fs_db *)data;
 139         int cfg_len = rec->lrh_len;
 140         char *cfg_buf = (char*) (rec + 1);
 141         struct lustre_cfg *lcfg;
 142         __u32 index;
 143         int rc = 0;
 144         ENTRY;
 145
 146         if (rec->lrh_type != OBD_CFG_REC) {
 147                 CERROR("unhandled lrh_type: %#x\n", rec->lrh_type);
 148                 RETURN(-EINVAL);
 149         }
 150
 151         rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
 152         if (rc) {
 153                 CERROR("Insane cfg\n");
 154                 RETURN(rc);
 155         }
 156
 157         lcfg = (struct lustre_cfg *)cfg_buf;
 158
 159         CDEBUG(D_INFO, "cmd %x %s %s\n", lcfg->lcfg_command,
 160                lustre_cfg_string(lcfg, 0), lustre_cfg_string(lcfg, 1));
 161
 162         /* Figure out ost indicies */
 163         /* lov_modify_tgts add 0:lov1  1:ost1_UUID  2(index):0  3(gen):1 */
 164         if (lcfg->lcfg_command == LCFG_LOV_ADD_OBD ||
 165             lcfg->lcfg_command == LCFG_LOV_DEL_OBD) {
 166                 index = simple_strtoul(lustre_cfg_string(lcfg, 2),
 167                                        NULL, 10);
 168                 CDEBUG(D_MGS, "OST index for %s is %u (%s)\n",
 169                        lustre_cfg_string(lcfg, 1), index,
 170                        lustre_cfg_string(lcfg, 2));
 171                 set_bit(index, fsdb->fsdb_ost_index_map);
 172         }
 173
 174         /* Figure out mdt indicies */
 175         /* attach   0:MDC_uml1_mdsA_MNT_client  1:mdc  2:1d834_MNT_client_03f */
 176         if ((lcfg->lcfg_command == LCFG_ATTACH) &&
 177             (strcmp(lustre_cfg_string(lcfg, 1), LUSTRE_MDC_NAME) == 0)) {
 178                 rc = server_name2index(lustre_cfg_string(lcfg, 0),
 179                                        &index, NULL);
 180                 if (rc != LDD_F_SV_TYPE_MDT) {
 181                         CWARN("Unparsable MDC name %s, assuming index 0\n",
 182                               lustre_cfg_string(lcfg, 0));
 183                         index = 0;
 184                 }
 185                 rc = 0;
 186                 CDEBUG(D_MGS, "MDT index is %u\n", index);
 187                 set_bit(index, fsdb->fsdb_mdt_index_map);
 188         }
 189
 190         /* COMPAT_146 */
 191         /* figure out the old LOV name. fsdb_gen = 0 means old log */
 192         /* #01 L attach 0:lov_mdsA 1:lov 2:cdbe9_lov_mdsA_dc8cf7f3bb */
 193         if ((fsdb->fsdb_gen == 0) && (lcfg->lcfg_command == LCFG_ATTACH) &&
 194             (strcmp(lustre_cfg_string(lcfg, 1), LUSTRE_LOV_NAME) == 0)) {
 195                 fsdb->fsdb_flags |= FSDB_OLDLOG14;
 196                 name_destroy(&fsdb->fsdb_clilov);
 197                 rc = name_create(&fsdb->fsdb_clilov,
 198                                  lustre_cfg_string(lcfg, 0), "");
 199                 if (rc)
 200                         RETURN(rc);
 201                 CDEBUG(D_MGS, "client lov name is %s\n", fsdb->fsdb_clilov);
 202         }
 203
 204         /* figure out the old MDT lov name from the MDT uuid */
 205         if ((fsdb->fsdb_gen == 0) && (lcfg->lcfg_command == LCFG_SETUP) &&
 206             (strncmp(lustre_cfg_string(lcfg, 0), "MDC_", 4) == 0)) {
 207                 char *ptr;
 208                 fsdb->fsdb_flags |= FSDB_OLDLOG14;
 209                 ptr = strstr(lustre_cfg_string(lcfg, 1), "_UUID");
 210                 if (!ptr) {
 211                         CERROR("Can't parse MDT uuid %s\n",
 212                                lustre_cfg_string(lcfg, 1));
 213                         RETURN(-EINVAL);
 214                 }
 215                 *ptr = '\0';
 216                 name_destroy(&fsdb->fsdb_mdtlov);
 217                 rc = name_create(&fsdb->fsdb_mdtlov,
 218                                  "lov_", lustre_cfg_string(lcfg, 1));
 219                 if (rc)
 220                         RETURN(rc);
 221                 name_destroy(&fsdb->fsdb_mdc);
 222                 rc = name_create(&fsdb->fsdb_mdc,
 223                                  lustre_cfg_string(lcfg, 0), "");
 224                 if (rc)
 225                         RETURN(rc);
 226                 CDEBUG(D_MGS, "MDT lov name is %s\n", fsdb->fsdb_mdtlov);
 227         }
 228         /* end COMPAT_146 */
 229
 230         /* Keep track of the latest marker step */
 231         if (lcfg->lcfg_command == LCFG_MARKER) {
 232                 struct cfg_marker *marker;
 233                 marker = lustre_cfg_buf(lcfg, 1);
 234                 fsdb->fsdb_gen = max(fsdb->fsdb_gen, marker->cm_step);
 235         }
 236
 237         RETURN(rc);
 238 }
 239
 240 /* fsdb->fsdb_sem is already held  in mgs_find_or_make_fsdb*/
 241 static int mgs_get_fsdb_from_llog(struct obd_device *obd, struct fs_db *fsdb)
 242 {
 243         char *logname;
 244         struct llog_handle *loghandle;
 245         struct lvfs_run_ctxt saved;
 246         struct llog_ctxt *ctxt;
 247         int rc, rc2;
 248         ENTRY;
 249
 250         ctxt = llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
 251         LASSERT(ctxt != NULL);
 252         name_create(&logname, fsdb->fsdb_name, "-client");
 253         down(&fsdb->fsdb_sem);
 254         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 255         rc = llog_create(ctxt, &loghandle, NULL, logname);
 256         if (rc)
 257                 GOTO(out_pop, rc);
 258
 259         rc = llog_init_handle(loghandle, LLOG_F_IS_PLAIN, NULL);
 260         if (rc)
 261                 GOTO(out_close, rc);
 262
 263         if (llog_get_size(loghandle) <= 1)
 264                 fsdb->fsdb_flags |= FSDB_LOG_EMPTY;
 265
 266         rc = llog_process(loghandle, mgs_fsdb_handler, (void *)fsdb, NULL);
 267         CDEBUG(D_INFO, "get_db = %d\n", rc);
 268 out_close:
 269         rc2 = llog_close(loghandle);
 270         if (!rc)
 271                 rc = rc2;
 272 out_pop:
 273         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 274         up(&fsdb->fsdb_sem);
 275         name_destroy(&logname);
 276         llog_ctxt_put(ctxt);
 277
 278         RETURN(rc);
 279 }
 280
 281 static void mgs_free_fsdb_srpc(struct fs_db *fsdb)
 282 {
 283         struct mgs_tgt_srpc_conf *tgtconf;
 284
 285         /* free target-specific rules */
 286         while (fsdb->fsdb_srpc_tgt) {
 287                 tgtconf = fsdb->fsdb_srpc_tgt;
 288                 fsdb->fsdb_srpc_tgt = tgtconf->mtsc_next;
 289
 290                 LASSERT(tgtconf->mtsc_tgt);
 291
 292                 sptlrpc_rule_set_free(&tgtconf->mtsc_rset);
 293                 OBD_FREE(tgtconf->mtsc_tgt, strlen(tgtconf->mtsc_tgt) + 1);
 294                 OBD_FREE_PTR(tgtconf);
 295         }
 296
 297         /* free general rules */
 298         sptlrpc_rule_set_free(&fsdb->fsdb_srpc_gen);
 299 }
 300
 301 static struct fs_db *mgs_find_fsdb(struct obd_device *obd, char *fsname)
 302 {
 303         struct mgs_obd *mgs = &obd->u.mgs;
 304         struct fs_db *fsdb;
 305         struct list_head *tmp;
 306
 307         list_for_each(tmp, &mgs->mgs_fs_db_list) {
 308                 fsdb = list_entry(tmp, struct fs_db, fsdb_list);
 309                 if (strcmp(fsdb->fsdb_name, fsname) == 0)
 310                         return fsdb;
 311         }
 312         return NULL;
 313 }
 314
 315 /* caller must hold the mgs->mgs_fs_db_lock */
 316 static struct fs_db *mgs_new_fsdb(struct obd_device *obd, char *fsname)
 317 {
 318         struct mgs_obd *mgs = &obd->u.mgs;
 319         struct fs_db *fsdb;
 320         int rc;
 321         ENTRY;
 322
 323         if (strlen(fsname) >= sizeof(fsdb->fsdb_name)) {
 324                 CERROR("fsname %s is too long\n", fsname);
 325                 RETURN(NULL);
 326         }
 327
 328         OBD_ALLOC_PTR(fsdb);
 329         if (!fsdb)
 330                 RETURN(NULL);
 331
 332         strcpy(fsdb->fsdb_name, fsname);
 333         sema_init(&fsdb->fsdb_sem, 1);
 334         fsdb->fsdb_fl_udesc = 1;
 335
 336         if (strcmp(fsname, MGSSELF_NAME) == 0) {
 337                 fsdb->fsdb_fl_mgsself = 1;
 338         } else {
 339                 OBD_ALLOC(fsdb->fsdb_ost_index_map, INDEX_MAP_SIZE);
 340                 OBD_ALLOC(fsdb->fsdb_mdt_index_map, INDEX_MAP_SIZE);
 341                 if (!fsdb->fsdb_ost_index_map || !fsdb->fsdb_mdt_index_map) {
 342                         CERROR("No memory for index maps\n");
 343                         GOTO(err, 0);
 344                 }
 345
 346                 rc = name_create(&fsdb->fsdb_mdtlov, fsname, "-mdtlov");
 347                 if (rc)
 348                         GOTO(err, rc);
 349                 rc = name_create(&fsdb->fsdb_mdtlmv, fsname, "-mdtlmv");
 350                 if (rc)
 351                         GOTO(err, rc);
 352                 rc = name_create(&fsdb->fsdb_clilov, fsname, "-clilov");
 353                 if (rc)
 354                         GOTO(err, rc);
 355                 rc = name_create(&fsdb->fsdb_clilmv, fsname, "-clilmv");
 356                 if (rc)
 357                         GOTO(err, rc);
 358
 359                 lproc_mgs_add_live(obd, fsdb);
 360         }
 361
 362         list_add(&fsdb->fsdb_list, &mgs->mgs_fs_db_list);
 363
 364         RETURN(fsdb);
 365 err:
 366         if (fsdb->fsdb_ost_index_map)
 367                 OBD_FREE(fsdb->fsdb_ost_index_map, INDEX_MAP_SIZE);
 368         if (fsdb->fsdb_mdt_index_map)
 369                 OBD_FREE(fsdb->fsdb_mdt_index_map, INDEX_MAP_SIZE);
 370         name_destroy(&fsdb->fsdb_clilov);
 371         name_destroy(&fsdb->fsdb_clilmv);
 372         name_destroy(&fsdb->fsdb_mdtlov);
 373         name_destroy(&fsdb->fsdb_mdtlmv);
 374         OBD_FREE_PTR(fsdb);
 375         RETURN(NULL);
 376 }
 377
 378 static void mgs_free_fsdb(struct obd_device *obd, struct fs_db *fsdb)
 379 {
 380         /* wait for anyone with the sem */
 381         down(&fsdb->fsdb_sem);
 382         lproc_mgs_del_live(obd, fsdb);
 383         list_del(&fsdb->fsdb_list);
 384         if (fsdb->fsdb_ost_index_map)
 385                 OBD_FREE(fsdb->fsdb_ost_index_map, INDEX_MAP_SIZE);
 386         if (fsdb->fsdb_mdt_index_map)
 387                 OBD_FREE(fsdb->fsdb_mdt_index_map, INDEX_MAP_SIZE);
 388         name_destroy(&fsdb->fsdb_clilov);
 389         name_destroy(&fsdb->fsdb_clilmv);
 390         name_destroy(&fsdb->fsdb_mdtlov);
 391         name_destroy(&fsdb->fsdb_mdtlmv);
 392         name_destroy(&fsdb->fsdb_mdc);
 393         mgs_free_fsdb_srpc(fsdb);
 394         OBD_FREE_PTR(fsdb);
 395 }
 396
 397 int mgs_init_fsdb_list(struct obd_device *obd)
 398 {
 399         struct mgs_obd *mgs = &obd->u.mgs;
 400         CFS_INIT_LIST_HEAD(&mgs->mgs_fs_db_list);
 401         return 0;
 402 }
 403
 404 int mgs_cleanup_fsdb_list(struct obd_device *obd)
 405 {
 406         struct mgs_obd *mgs = &obd->u.mgs;
 407         struct fs_db *fsdb;
 408         struct list_head *tmp, *tmp2;
 409         down(&mgs->mgs_sem);
 410         list_for_each_safe(tmp, tmp2, &mgs->mgs_fs_db_list) {
 411                 fsdb = list_entry(tmp, struct fs_db, fsdb_list);
 412                 mgs_free_fsdb(obd, fsdb);
 413         }
 414         up(&mgs->mgs_sem);
 415         return 0;
 416 }
 417
 418 int mgs_find_or_make_fsdb(struct obd_device *obd, char *name,
 419                           struct fs_db **dbh)
 420 {
 421         struct mgs_obd *mgs = &obd->u.mgs;
 422         struct fs_db *fsdb;
 423         int rc = 0;
 424
 425         down(&mgs->mgs_sem);
 426         fsdb = mgs_find_fsdb(obd, name);
 427         if (fsdb) {
 428                 up(&mgs->mgs_sem);
 429                 *dbh = fsdb;
 430                 return 0;
 431         }
 432
 433         CDEBUG(D_MGS, "Creating new db\n");
 434         fsdb = mgs_new_fsdb(obd, name);
 435         up(&mgs->mgs_sem);
 436         if (!fsdb)
 437                 return -ENOMEM;
 438
 439         if (!fsdb->fsdb_fl_mgsself) {
 440                 /* populate the db from the client llog */
 441                 rc = mgs_get_fsdb_from_llog(obd, fsdb);
 442                 if (rc) {
 443                         CERROR("Can't get db from client log %d\n", rc);
 444                         mgs_free_fsdb(obd, fsdb);
 445                         return rc;
 446                 }
 447         }
 448
 449         /* populate srpc rules from params llog */
 450         rc = mgs_get_fsdb_srpc_from_llog(obd, fsdb);
 451         if (rc) {
 452                 CERROR("Can't get db from params log %d\n", rc);
 453                 mgs_free_fsdb(obd, fsdb);
 454                 return rc;
 455         }
 456
 457         *dbh = fsdb;
 458
 459         return 0;
 460 }
 461
 462 /* 1 = index in use
 463    0 = index unused
 464    -1= empty client log */
 465 int mgs_check_index(struct obd_device *obd, struct mgs_target_info *mti)
 466 {
 467         struct fs_db *fsdb;
 468         void *imap;
 469         int rc = 0;
 470         ENTRY;
 471
 472         LASSERT(!(mti->mti_flags & LDD_F_NEED_INDEX));
 473
 474         rc = mgs_find_or_make_fsdb(obd, mti->mti_fsname, &fsdb);
 475         if (rc) {
 476                 CERROR("Can't get db for %s\n", mti->mti_fsname);
 477                 RETURN(rc);
 478         }
 479
 480         if (fsdb->fsdb_flags & FSDB_LOG_EMPTY)
 481                 RETURN(-1);
 482
 483         if (mti->mti_flags & LDD_F_SV_TYPE_OST)
 484                 imap = fsdb->fsdb_ost_index_map;
 485         else if (mti->mti_flags & LDD_F_SV_TYPE_MDT)
 486                 imap = fsdb->fsdb_mdt_index_map;
 487         else
 488                 RETURN(-EINVAL);
 489
 490         if (test_bit(mti->mti_stripe_index, imap))
 491                 RETURN(1);
 492         RETURN(0);
 493 }
 494
 495 static __inline__ int next_index(void *index_map, int map_len)
 496 {
 497         int i;
 498         for (i = 0; i < map_len * 8; i++)
 499                  if (!test_bit(i, index_map)) {
 500                          return i;
 501                  }
 502         CERROR("max index %d exceeded.\n", i);
 503         return -1;
 504 }
 505
 506 /* Return codes:
 507         0  newly marked as in use
 508         <0 err
 509         +EALREADY for update of an old index */
 510 int mgs_set_index(struct obd_device *obd, struct mgs_target_info *mti)
 511 {
 512         struct fs_db *fsdb;
 513         void *imap;
 514         int rc = 0;
 515         ENTRY;
 516
 517         rc = mgs_find_or_make_fsdb(obd, mti->mti_fsname, &fsdb);
 518         if (rc) {
 519                 CERROR("Can't get db for %s\n", mti->mti_fsname);
 520                 RETURN(rc);
 521         }
 522
 523         if (mti->mti_flags & LDD_F_SV_TYPE_OST)
 524                 imap = fsdb->fsdb_ost_index_map;
 525         else if (mti->mti_flags & LDD_F_SV_TYPE_MDT)
 526                 imap = fsdb->fsdb_mdt_index_map;
 527         else
 528                 RETURN(-EINVAL);
 529
 530         if (mti->mti_flags & LDD_F_NEED_INDEX) {
 531                 rc = next_index(imap, INDEX_MAP_SIZE);
 532                 if (rc == -1)
 533                         RETURN(-ERANGE);
 534                 mti->mti_stripe_index = rc;
 535         }
 536
 537         if (mti->mti_stripe_index >= INDEX_MAP_SIZE * 8) {
 538                 LCONSOLE_ERROR_MSG(0x13f, "Server %s requested index %d, "
 539                                    "but the max index is %d.\n",
 540                                    mti->mti_svname, mti->mti_stripe_index,
 541                                    INDEX_MAP_SIZE * 8);
 542                 RETURN(-ERANGE);
 543         }
 544
 545         if (test_bit(mti->mti_stripe_index, imap)) {
 546                 if ((mti->mti_flags & LDD_F_VIRGIN) &&
 547                     !(mti->mti_flags & LDD_F_WRITECONF)) {
 548                         LCONSOLE_ERROR_MSG(0x140, "Server %s requested index "
 549                                            "%d, but that index is already in "
 550                                            "use. Use --writeconf to force\n",
 551                                            mti->mti_svname,
 552                                            mti->mti_stripe_index);
 553                         RETURN(-EADDRINUSE);
 554                 } else {
 555                         CDEBUG(D_MGS, "Server %s updating index %d\n",
 556                                mti->mti_svname, mti->mti_stripe_index);
 557                         RETURN(EALREADY);
 558                 }
 559         }
 560
 561         set_bit(mti->mti_stripe_index, imap);
 562         fsdb->fsdb_flags &= ~FSDB_LOG_EMPTY;
 563         server_make_name(mti->mti_flags, mti->mti_stripe_index,
 564                          mti->mti_fsname, mti->mti_svname);
 565
 566         CDEBUG(D_MGS, "Set index for %s to %d\n", mti->mti_svname,
 567                mti->mti_stripe_index);
 568
 569         RETURN(0);
 570 }
 571
 572 struct mgs_modify_lookup {
 573         struct cfg_marker mml_marker;
 574         int               mml_modified;
 575 };
 576
 577 static int mgs_modify_handler(struct llog_handle *llh, struct llog_rec_hdr *rec,
 578                               void *data)
 579 {
 580         struct mgs_modify_lookup *mml = (struct mgs_modify_lookup *)data;
 581         struct cfg_marker *marker;
 582         struct lustre_cfg *lcfg = (struct lustre_cfg *)(rec + 1);
 583         int cfg_len = rec->lrh_len - sizeof(struct llog_rec_hdr) -
 584                 sizeof(struct llog_rec_tail);
 585         int rc;
 586         ENTRY;
 587
 588         if (rec->lrh_type != OBD_CFG_REC) {
 589                 CERROR("unhandled lrh_type: %#x\n", rec->lrh_type);
 590                 RETURN(-EINVAL);
 591         }
 592
 593         rc = lustre_cfg_sanity_check(lcfg, cfg_len);
 594         if (rc) {
 595                 CERROR("Insane cfg\n");
 596                 RETURN(rc);
 597         }
 598
 599         /* We only care about markers */
 600         if (lcfg->lcfg_command != LCFG_MARKER)
 601                 RETURN(0);
 602
 603         marker = lustre_cfg_buf(lcfg, 1);
 604         if ((strcmp(mml->mml_marker.cm_comment, marker->cm_comment) == 0) &&
 605             (strcmp(mml->mml_marker.cm_tgtname, marker->cm_tgtname) == 0) &&
 606             !(marker->cm_flags & CM_SKIP)) {
 607                 /* Found a non-skipped marker match */
 608                 CDEBUG(D_MGS, "Changing rec %u marker %d %x->%x: %s %s\n",
 609                        rec->lrh_index, marker->cm_step,
 610                        marker->cm_flags, mml->mml_marker.cm_flags,
 611                        marker->cm_tgtname, marker->cm_comment);
 612                 /* Overwrite the old marker llog entry */
 613                 marker->cm_flags &= ~CM_EXCLUDE; /* in case we're unexcluding */
 614                 marker->cm_flags |= mml->mml_marker.cm_flags;
 615                 marker->cm_canceltime = mml->mml_marker.cm_canceltime;
 616                 /* Header and tail are added back to lrh_len in
 617                    llog_lvfs_write_rec */
 618                 rec->lrh_len = cfg_len;
 619                 rc = llog_write_rec(llh, rec, NULL, 0, (void *)lcfg,
 620                                     rec->lrh_index);
 621                 if (!rc)
 622                          mml->mml_modified++;
 623         }
 624
 625         RETURN(rc);
 626 }
 627
 628 /* Modify an existing config log record (for CM_SKIP or CM_EXCLUDE) */
 629 static int mgs_modify(struct obd_device *obd, struct fs_db *fsdb,
 630                       struct mgs_target_info *mti, char *logname,
 631                       char *devname, char *comment, int flags)
 632 {
 633         struct llog_handle *loghandle;
 634         struct lvfs_run_ctxt saved;
 635         struct llog_ctxt *ctxt;
 636         struct mgs_modify_lookup *mml;
 637         int rc, rc2;
 638         ENTRY;
 639
 640         CDEBUG(D_MGS, "modify %s/%s/%s\n", logname, devname, comment);
 641
 642         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 643
 644         ctxt = llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
 645         LASSERT(ctxt != NULL);
 646         rc = llog_create(ctxt, &loghandle, NULL, logname);
 647         if (rc)
 648                 GOTO(out_pop, rc);
 649
 650         rc = llog_init_handle(loghandle, LLOG_F_IS_PLAIN, NULL);
 651         if (rc)
 652                 GOTO(out_close, rc);
 653
 654         if (llog_get_size(loghandle) <= 1)
 655                 GOTO(out_close, rc = 0);
 656
 657         OBD_ALLOC_PTR(mml);
 658         if (!mml)
 659                 GOTO(out_close, rc = -ENOMEM);
 660         strcpy(mml->mml_marker.cm_comment, comment);
 661         strcpy(mml->mml_marker.cm_tgtname, devname);
 662         /* Modify mostly means cancel */
 663         mml->mml_marker.cm_flags = flags;
 664         mml->mml_marker.cm_canceltime = flags ? cfs_time_current_sec() : 0;
 665         mml->mml_modified = 0;
 666         rc = llog_process(loghandle, mgs_modify_handler, (void *)mml, NULL);
 667         if (!rc && !mml->mml_modified)
 668                 rc = -ENODEV;
 669         OBD_FREE_PTR(mml);
 670
 671 out_close:
 672         rc2 = llog_close(loghandle);
 673         if (!rc)
 674                 rc = rc2;
 675 out_pop:
 676         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 677         if (rc && rc != -ENODEV)
 678                 CERROR("modify %s/%s failed %d\n",
 679                        mti->mti_svname, comment, rc);
 680         llog_ctxt_put(ctxt);
 681         RETURN(rc);
 682 }
 683
 684 /******************** config log recording functions *********************/
 685
 686 static int record_lcfg(struct obd_device *obd, struct llog_handle *llh,
 687                          struct lustre_cfg *lcfg)
 688 {
 689         struct lvfs_run_ctxt   saved;
 690         struct llog_rec_hdr    rec;
 691         int buflen, rc;
 692
 693         if (!lcfg || !llh)
 694                 return -ENOMEM;
 695
 696         LASSERT(llh->lgh_ctxt);
 697
 698         buflen = lustre_cfg_len(lcfg->lcfg_bufcount,
 699                                 lcfg->lcfg_buflens);
 700         rec.lrh_len = llog_data_len(buflen);
 701         rec.lrh_type = OBD_CFG_REC;
 702
 703         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 704         /* idx = -1 means append */
 705         rc = llog_write_rec(llh, &rec, NULL, 0, (void *)lcfg, -1);
 706         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 707         if (rc)
 708                 CERROR("failed %d\n", rc);
 709         return rc;
 710 }
 711
 712 static int record_base(struct obd_device *obd, struct llog_handle *llh,
 713                      char *cfgname, lnet_nid_t nid, int cmd,
 714                      char *s1, char *s2, char *s3, char *s4)
 715 {
 716         struct lustre_cfg_bufs bufs;
 717         struct lustre_cfg     *lcfg;
 718         int rc;
 719
 720         CDEBUG(D_MGS, "lcfg %s %#x %s %s %s %s\n", cfgname,
 721                cmd, s1, s2, s3, s4);
 722
 723         lustre_cfg_bufs_reset(&bufs, cfgname);
 724         if (s1)
 725                 lustre_cfg_bufs_set_string(&bufs, 1, s1);
 726         if (s2)
 727                 lustre_cfg_bufs_set_string(&bufs, 2, s2);
 728         if (s3)
 729                 lustre_cfg_bufs_set_string(&bufs, 3, s3);
 730         if (s4)
 731                 lustre_cfg_bufs_set_string(&bufs, 4, s4);
 732
 733         lcfg = lustre_cfg_new(cmd, &bufs);
 734         if (!lcfg)
 735                 return -ENOMEM;
 736         lcfg->lcfg_nid = nid;
 737
 738         rc = record_lcfg(obd, llh, lcfg);
 739
 740         lustre_cfg_free(lcfg);
 741
 742         if (rc) {
 743                 CERROR("error %d: lcfg %s %#x %s %s %s %s\n", rc, cfgname,
 744                        cmd, s1, s2, s3, s4);
 745         }
 746         return(rc);
 747 }
 748
 749
 750 static inline int record_add_uuid(struct obd_device *obd,
 751                                   struct llog_handle *llh,
 752                                   uint64_t nid, char *uuid)
 753 {
 754         return record_base(obd,llh,NULL,nid,LCFG_ADD_UUID,uuid,0,0,0);
 755
 756 }
 757
 758 static inline int record_add_conn(struct obd_device *obd,
 759                                   struct llog_handle *llh,
 760                                   char *devname,
 761                                   char *uuid)
 762 {
 763         return record_base(obd,llh,devname,0,LCFG_ADD_CONN,uuid,0,0,0);
 764 }
 765
 766 static inline int record_attach(struct obd_device *obd, struct llog_handle *llh,
 767                                 char *devname, char *type, char *uuid)
 768 {
 769         return record_base(obd,llh,devname,0,LCFG_ATTACH,type,uuid,0,0);
 770 }
 771
 772 static inline int record_setup(struct obd_device *obd, struct llog_handle *llh,
 773                                char *devname,
 774                                char *s1, char *s2, char *s3, char *s4)
 775 {
 776         return record_base(obd,llh,devname,0,LCFG_SETUP,s1,s2,s3,s4);
 777 }
 778
 779 static int record_lov_setup(struct obd_device *obd, struct llog_handle *llh,
 780                             char *devname, struct lov_desc *desc)
 781 {
 782         struct lustre_cfg_bufs bufs;
 783         struct lustre_cfg *lcfg;
 784         int rc;
 785
 786         lustre_cfg_bufs_reset(&bufs, devname);
 787         lustre_cfg_bufs_set(&bufs, 1, desc, sizeof(*desc));
 788         lcfg = lustre_cfg_new(LCFG_SETUP, &bufs);
 789         if (!lcfg)
 790                 return -ENOMEM;
 791         rc = record_lcfg(obd, llh, lcfg);
 792
 793         lustre_cfg_free(lcfg);
 794         return rc;
 795 }
 796
 797 static int record_lmv_setup(struct obd_device *obd, struct llog_handle *llh,
 798                             char *devname, struct lmv_desc *desc)
 799 {
 800         struct lustre_cfg_bufs bufs;
 801         struct lustre_cfg *lcfg;
 802         int rc;
 803
 804         lustre_cfg_bufs_reset(&bufs, devname);
 805         lustre_cfg_bufs_set(&bufs, 1, desc, sizeof(*desc));
 806         lcfg = lustre_cfg_new(LCFG_SETUP, &bufs);
 807
 808         rc = record_lcfg(obd, llh, lcfg);
 809
 810         lustre_cfg_free(lcfg);
 811         return rc;
 812 }
 813
 814 static inline int record_mdc_add(struct obd_device *obd,
 815                                  struct llog_handle *llh,
 816                                  char *logname, char *mdcuuid,
 817                                  char *mdtuuid, char *index,
 818                                  char *gen)
 819 {
 820         return record_base(obd,llh,logname,0,LCFG_ADD_MDC,
 821                            mdtuuid,index,gen,mdcuuid);
 822 }
 823
 824 static inline int record_lov_add(struct obd_device *obd,
 825                                  struct llog_handle *llh,
 826                                  char *lov_name, char *ost_uuid,
 827                                  char *index, char *gen)
 828 {
 829         return record_base(obd,llh,lov_name,0,LCFG_LOV_ADD_OBD,
 830                            ost_uuid,index,gen,0);
 831 }
 832
 833 static inline int record_mount_opt(struct obd_device *obd,
 834                                    struct llog_handle *llh,
 835                                    char *profile, char *lov_name,
 836                                    char *mdc_name)
 837 {
 838         return record_base(obd,llh,NULL,0,LCFG_MOUNTOPT,
 839                            profile,lov_name,mdc_name,0);
 840 }
 841
 842 static int record_marker(struct obd_device *obd, struct llog_handle *llh,
 843                          struct fs_db *fsdb, __u32 flags,
 844                          char *tgtname, char *comment)
 845 {
 846         struct cfg_marker marker;
 847         struct lustre_cfg_bufs bufs;
 848         struct lustre_cfg *lcfg;
 849         int rc;
 850
 851         if (flags & CM_START)
 852                 fsdb->fsdb_gen++;
 853         marker.cm_step = fsdb->fsdb_gen;
 854         marker.cm_flags = flags;
 855         marker.cm_vers = LUSTRE_VERSION_CODE;
 856         strncpy(marker.cm_tgtname, tgtname, sizeof(marker.cm_tgtname));
 857         strncpy(marker.cm_comment, comment, sizeof(marker.cm_comment));
 858         marker.cm_createtime = cfs_time_current_sec();
 859         marker.cm_canceltime = 0;
 860         lustre_cfg_bufs_reset(&bufs, NULL);
 861         lustre_cfg_bufs_set(&bufs, 1, &marker, sizeof(marker));
 862         lcfg = lustre_cfg_new(LCFG_MARKER, &bufs);
 863         if (!lcfg)
 864                 return -ENOMEM;
 865         rc = record_lcfg(obd, llh, lcfg);
 866
 867         lustre_cfg_free(lcfg);
 868         return rc;
 869 }
 870
 871 static int record_start_log(struct obd_device *obd,
 872                             struct llog_handle **llh, char *name)
 873 {
 874         static struct obd_uuid cfg_uuid = { .uuid = "config_uuid" };
 875         struct lvfs_run_ctxt saved;
 876         struct llog_ctxt *ctxt;
 877         int rc = 0;
 878
 879         if (*llh)
 880                 GOTO(out, rc = -EBUSY);
 881
 882         ctxt = llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
 883         if (!ctxt)
 884                 GOTO(out, rc = -ENODEV);
 885
 886         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 887         rc = llog_create(ctxt, llh, NULL, name);
 888         if (rc == 0)
 889                 llog_init_handle(*llh, LLOG_F_IS_PLAIN, &cfg_uuid);
 890         else
 891                 *llh = NULL;
 892
 893         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 894         llog_ctxt_put(ctxt);
 895
 896 out:
 897         if (rc) {
 898                 CERROR("Can't start log %s: %d\n", name, rc);
 899         }
 900         RETURN(rc);
 901 }
 902
 903 static int record_end_log(struct obd_device *obd, struct llog_handle **llh)
 904 {
 905         struct lvfs_run_ctxt saved;
 906         int rc = 0;
 907
 908         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 909
 910         rc = llog_close(*llh);
 911         *llh = NULL;
 912
 913         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 914         RETURN(rc);
 915 }
 916
 917 static int mgs_log_is_empty(struct obd_device *obd, char *name)
 918 {
 919         struct lvfs_run_ctxt saved;
 920         struct llog_handle *llh;
 921         struct llog_ctxt *ctxt;
 922         int rc = 0;
 923
 924         ctxt = llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
 925         LASSERT(ctxt != NULL);
 926         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 927         rc = llog_create(ctxt, &llh, NULL, name);
 928         if (rc == 0) {
 929                 llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
 930                 rc = llog_get_size(llh);
 931                 llog_close(llh);
 932         }
 933         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 934         llog_ctxt_put(ctxt);
 935         /* header is record 1 */
 936         return(rc <= 1);
 937 }
 938
 939 /******************** config "macros" *********************/
 940
 941 /* write an lcfg directly into a log (with markers) */
 942 static int mgs_write_log_direct(struct obd_device *obd, struct fs_db *fsdb,
 943                                 char *logname, struct lustre_cfg *lcfg,
 944                                 char *devname, char *comment)
 945 {
 946         struct llog_handle *llh = NULL;
 947         int rc;
 948         ENTRY;
 949
 950         if (!lcfg)
 951                 RETURN(-ENOMEM);
 952
 953         rc = record_start_log(obd, &llh, logname);
 954         if (rc)
 955                 RETURN(rc);
 956
 957         /* FIXME These should be a single journal transaction */
 958         rc = record_marker(obd, llh, fsdb, CM_START, devname, comment);
 959
 960         rc = record_lcfg(obd, llh, lcfg);
 961
 962         rc = record_marker(obd, llh, fsdb, CM_END, devname, comment);
 963         rc = record_end_log(obd, &llh);
 964
 965         RETURN(rc);
 966 }
 967
 968 /* write the lcfg in all logs for the given fs */
 969 int mgs_write_log_direct_all(struct obd_device *obd, struct fs_db *fsdb,
 970                              struct mgs_target_info *mti,
 971                              struct lustre_cfg *lcfg,
 972                              char *devname, char *comment)
 973 {
 974         struct mgs_obd *mgs = &obd->u.mgs;
 975         struct list_head dentry_list;
 976         struct l_linux_dirent *dirent, *n;
 977         char *fsname = mti->mti_fsname;
 978         char *logname;
 979         int rc = 0, len = strlen(fsname);
 980         ENTRY;
 981
 982         /* We need to set params for any future logs
 983            as well. FIXME Append this file to every new log.
 984            Actually, we should store as params (text), not llogs.  Or
 985            in a database. */
 986         name_create(&logname, fsname, "-params");
 987         if (mgs_log_is_empty(obd, logname)) {
 988                 struct llog_handle *llh = NULL;
 989                 rc = record_start_log(obd, &llh, logname);
 990                 record_end_log(obd, &llh);
 991         }
 992         name_destroy(&logname);
 993         if (rc)
 994                 RETURN(rc);
 995
 996         /* Find all the logs in the CONFIGS directory */
 997         rc = class_dentry_readdir(obd, mgs->mgs_configs_dir,
 998                                   mgs->mgs_vfsmnt, &dentry_list);
 999         if (rc) {
1000                 CERROR("Can't read %s dir\n", MOUNT_CONFIGS_DIR);
1001                 RETURN(rc);
1002         }
1003
1004         /* Could use fsdb index maps instead of directory listing */
1005         list_for_each_entry_safe(dirent, n, &dentry_list, lld_list) {
1006                 list_del(&dirent->lld_list);
1007                 /* don't write to sptlrpc rule log */
1008                 if (strncmp(fsname, dirent->lld_name, len) == 0 &&
1009                     strstr(dirent->lld_name, "-sptlrpc") == NULL) {
1010                         CDEBUG(D_MGS, "Changing log %s\n", dirent->lld_name);
1011                         /* Erase any old settings of this same parameter */
1012                         mgs_modify(obd, fsdb, mti, dirent->lld_name, devname,
1013                                    comment, CM_SKIP);
1014                         /* Write the new one */
1015                         rc = mgs_write_log_direct(obd, fsdb, dirent->lld_name,
1016                                                   lcfg, devname, comment);
1017                         if (rc)
1018                                 CERROR("err %d writing log %s\n", rc,
1019                                        dirent->lld_name);
1020                 }
1021                 OBD_FREE(dirent, sizeof(*dirent));
1022         }
1023
1024         RETURN(rc);
1025 }
1026
1027 struct temp_comp
1028 {
1029         struct mgs_target_info   *comp_tmti;
1030         struct mgs_target_info   *comp_mti;
1031         struct fs_db             *comp_fsdb;
1032         struct obd_device        *comp_obd;
1033 };
1034
1035 static int mgs_write_log_mdc_to_mdt(struct obd_device *, struct fs_db *,
1036                                     struct mgs_target_info *, char *);
1037
1038 static int mgs_steal_llog_handler(struct llog_handle *llh,
1039                                   struct llog_rec_hdr *rec,
1040                                   void *data)
1041 {
1042         struct obd_device * obd;
1043         struct mgs_target_info *mti, *tmti;
1044         struct fs_db *fsdb;
1045         int cfg_len = rec->lrh_len;
1046         char *cfg_buf = (char*) (rec + 1);
1047         struct lustre_cfg *lcfg;
1048         int rc = 0;
1049         struct llog_handle *mdt_llh = NULL;
1050         static int got_an_osc_or_mdc = 0;
1051         /* 0: not found any osc/mdc;
1052            1: found osc;
1053            2: found mdc;
1054         */
1055         static int last_step = -1;
1056
1057         ENTRY;
1058
1059         mti = ((struct temp_comp*)data)->comp_mti;
1060         tmti = ((struct temp_comp*)data)->comp_tmti;
1061         fsdb = ((struct temp_comp*)data)->comp_fsdb;
1062         obd = ((struct temp_comp*)data)->comp_obd;
1063
1064         if (rec->lrh_type != OBD_CFG_REC) {
1065                 CERROR("unhandled lrh_type: %#x\n", rec->lrh_type);
1066                 RETURN(-EINVAL);
1067         }
1068
1069         rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1070         if (rc) {
1071                 CERROR("Insane cfg\n");
1072                 RETURN(rc);
1073         }
1074
1075         lcfg = (struct lustre_cfg *)cfg_buf;
1076
1077         if (lcfg->lcfg_command == LCFG_MARKER) {
1078                 struct cfg_marker *marker;
1079                 marker = lustre_cfg_buf(lcfg, 1);
1080                 if (!strncmp(marker->cm_comment,"add osc",7) &&
1081                     (marker->cm_flags & CM_START)){
1082                         got_an_osc_or_mdc = 1;
1083                         rc = record_start_log(obd, &mdt_llh, mti->mti_svname);
1084                         rc = record_marker(obd, mdt_llh, fsdb, CM_START,
1085                                            mti->mti_svname,"add osc(copied)");
1086                         rc = record_end_log(obd, &mdt_llh);
1087                         last_step = marker->cm_step;
1088                         RETURN(rc);
1089                 }
1090                 if (!strncmp(marker->cm_comment,"add osc",7) &&
1091                     (marker->cm_flags & CM_END)){
1092                         LASSERT(last_step == marker->cm_step);
1093                         last_step = -1;
1094                         got_an_osc_or_mdc = 0;
1095                         rc = record_start_log(obd, &mdt_llh, mti->mti_svname);
1096                         rc = record_marker(obd, mdt_llh, fsdb, CM_END,
1097                                            mti->mti_svname,"add osc(copied)");
1098                         rc = record_end_log(obd, &mdt_llh);
1099                         RETURN(rc);
1100                 }
1101                 if (!strncmp(marker->cm_comment,"add mdc",7) &&
1102                     (marker->cm_flags & CM_START)){
1103                         got_an_osc_or_mdc = 2;
1104                         last_step = marker->cm_step;
1105                         memcpy(tmti->mti_svname, marker->cm_tgtname,
1106                                strlen(marker->cm_tgtname));
1107
1108                         RETURN(rc);
1109                 }
1110                 if (!strncmp(marker->cm_comment,"add mdc",7) &&
1111                     (marker->cm_flags & CM_END)){
1112                         LASSERT(last_step == marker->cm_step);
1113                         last_step = -1;
1114                         got_an_osc_or_mdc = 0;
1115                         RETURN(rc);
1116                 }
1117         }
1118
1119         if (got_an_osc_or_mdc == 0 || last_step < 0)
1120                 RETURN(rc);
1121
1122         if (lcfg->lcfg_command == LCFG_ADD_UUID) {
1123                 uint64_t nodenid;
1124                 nodenid = lcfg->lcfg_nid;
1125
1126                 tmti->mti_nids[tmti->mti_nid_count] = nodenid;
1127                 tmti->mti_nid_count++;
1128
1129                 RETURN(rc);
1130         }
1131
1132         if (lcfg->lcfg_command == LCFG_SETUP) {
1133                 char *target;
1134
1135                 target = lustre_cfg_string(lcfg, 1);
1136                 memcpy(tmti->mti_uuid, target, strlen(target));
1137                 RETURN(rc);
1138         }
1139
1140         /* ignore client side sptlrpc_conf_log */
1141         if (lcfg->lcfg_command == LCFG_SPTLRPC_CONF)
1142                 RETURN(rc);
1143
1144         if (lcfg->lcfg_command == LCFG_ADD_MDC) {
1145                 int index;
1146
1147                 if (sscanf(lustre_cfg_buf(lcfg, 2), "%d", &index) != 1)
1148                         RETURN (-EINVAL);
1149
1150                 memcpy(tmti->mti_fsname, mti->mti_fsname,
1151                        strlen(mti->mti_fsname));
1152                 tmti->mti_stripe_index = index;
1153
1154                 mgs_write_log_mdc_to_mdt(obd, fsdb, tmti, mti->mti_svname);
1155                 memset(tmti, 0, sizeof(*tmti));
1156                 RETURN(rc);
1157         }
1158         RETURN(rc);
1159 }
1160
1161 /* fsdb->fsdb_sem is already held  in mgs_write_log_target*/
1162 /* stealed from mgs_get_fsdb_from_llog*/
1163 static int mgs_steal_llog_for_mdt_from_client(struct obd_device *obd,
1164                                               char *client_name,
1165                                               struct temp_comp* comp)
1166 {
1167         struct llog_handle *loghandle;
1168         struct lvfs_run_ctxt saved;
1169         struct mgs_target_info *tmti;
1170         struct llog_ctxt *ctxt;
1171         int rc, rc2;
1172         ENTRY;
1173
1174         ctxt = llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
1175         LASSERT(ctxt != NULL);
1176
1177         OBD_ALLOC_PTR(tmti);
1178         if (tmti == NULL)
1179                 RETURN(-ENOMEM);
1180
1181         comp->comp_tmti = tmti;
1182         comp->comp_obd = obd;
1183
1184         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1185
1186         rc = llog_create(ctxt, &loghandle, NULL, client_name);
1187         if (rc)
1188                 GOTO(out_pop, rc);
1189
1190         rc = llog_init_handle(loghandle, LLOG_F_IS_PLAIN, NULL);
1191         if (rc)
1192                 GOTO(out_close, rc);
1193
1194         rc = llog_process(loghandle, mgs_steal_llog_handler, (void *)comp, NULL);
1195         CDEBUG(D_MGS, "steal llog re = %d\n", rc);
1196 out_close:
1197         rc2 = llog_close(loghandle);
1198         if (!rc)
1199                 rc = rc2;
1200 out_pop:
1201         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1202         OBD_FREE_PTR(tmti);
1203         llog_ctxt_put(ctxt);
1204         RETURN(rc);
1205 }
1206
1207 /* lmv is the second thing for client logs */
1208 /* copied from mgs_write_log_lov. Please refer to that.  */
1209 static int mgs_write_log_lmv(struct obd_device *obd, struct fs_db *fsdb,
1210                              struct mgs_target_info *mti,
1211                              char *logname, char *lmvname)
1212 {
1213         struct llog_handle *llh = NULL;
1214         struct lmv_desc *lmvdesc;
1215         char *uuid;
1216         int rc = 0;
1217         ENTRY;
1218
1219         CDEBUG(D_MGS, "Writing lmv(%s) log for %s\n", lmvname,logname);
1220
1221         OBD_ALLOC_PTR(lmvdesc);
1222         if (lmvdesc == NULL)
1223                 RETURN(-ENOMEM);
1224         lmvdesc->ld_active_tgt_count = 0;
1225         lmvdesc->ld_tgt_count = 0;
1226         sprintf((char*)lmvdesc->ld_uuid.uuid, "%s_UUID", lmvname);
1227         uuid = (char *)lmvdesc->ld_uuid.uuid;
1228
1229         rc = record_start_log(obd, &llh, logname);
1230         rc = record_marker(obd, llh, fsdb, CM_START, lmvname, "lmv setup");
1231         rc = record_attach(obd, llh, lmvname, "lmv", uuid);
1232         rc = record_lmv_setup(obd, llh, lmvname, lmvdesc);
1233         rc = record_marker(obd, llh, fsdb, CM_END, lmvname, "lmv setup");
1234         rc = record_end_log(obd, &llh);
1235
1236         OBD_FREE_PTR(lmvdesc);
1237         RETURN(rc);
1238 }
1239
1240 /* lov is the first thing in the mdt and client logs */
1241 static int mgs_write_log_lov(struct obd_device *obd, struct fs_db *fsdb,
1242                              struct mgs_target_info *mti,
1243                              char *logname, char *lovname)
1244 {
1245         struct llog_handle *llh = NULL;
1246         struct lov_desc *lovdesc;
1247         char *uuid;
1248         int rc = 0;
1249         ENTRY;
1250
1251         CDEBUG(D_MGS, "Writing lov(%s) log for %s\n", lovname, logname);
1252
1253         /*
1254         #01 L attach   0:lov_mdsA  1:lov  2:71ccb_lov_mdsA_19f961a9e1
1255         #02 L lov_setup 0:lov_mdsA 1:(struct lov_desc)
1256               uuid=lov1_UUID, stripe count=1, size=1048576, offset=0, pattern=0
1257         */
1258
1259         /* FIXME just make lov_setup accept empty desc (put uuid in buf 2) */
1260         OBD_ALLOC_PTR(lovdesc);
1261         if (lovdesc == NULL)
1262                 RETURN(-ENOMEM);
1263         lovdesc->ld_magic = LOV_DESC_MAGIC;
1264         lovdesc->ld_tgt_count = 0;
1265         /* Defaults.  Can be changed later by lcfg config_param */
1266         lovdesc->ld_default_stripe_count = 1;
1267         lovdesc->ld_pattern = LOV_PATTERN_RAID0;
1268         lovdesc->ld_default_stripe_size = 1024 * 1024;
1269         lovdesc->ld_default_stripe_offset = 0;
1270         lovdesc->ld_qos_maxage = QOS_DEFAULT_MAXAGE;
1271         sprintf((char*)lovdesc->ld_uuid.uuid, "%s_UUID", lovname);
1272         /* can these be the same? */
1273         uuid = (char *)lovdesc->ld_uuid.uuid;
1274
1275         /* This should always be the first entry in a log.
1276         rc = mgs_clear_log(obd, logname); */
1277         rc = record_start_log(obd, &llh, logname);
1278         if (rc)
1279                 GOTO(out, rc);
1280         /* FIXME these should be a single journal transaction */
1281         rc = record_marker(obd, llh, fsdb, CM_START, lovname, "lov setup");
1282         rc = record_attach(obd, llh, lovname, "lov", uuid);
1283         rc = record_lov_setup(obd, llh, lovname, lovdesc);
1284         rc = record_marker(obd, llh, fsdb, CM_END, lovname, "lov setup");
1285         rc = record_end_log(obd, &llh);
1286
1287         EXIT;
1288 out:
1289         OBD_FREE_PTR(lovdesc);
1290         return rc;
1291 }
1292
1293 /* add failnids to open log */
1294 static int mgs_write_log_failnids(struct obd_device *obd,
1295                                   struct mgs_target_info *mti,
1296                                   struct llog_handle *llh,
1297                                   char *cliname)
1298 {
1299         char *failnodeuuid = NULL;
1300         char *ptr = mti->mti_params;
1301         lnet_nid_t nid;
1302         int rc = 0;
1303
1304         /*
1305         #03 L add_uuid  nid=uml1@tcp(0x20000c0a80201) nal=90 0:  1:uml1_UUID
1306         #04 L add_uuid  nid=1@elan(0x1000000000001)   nal=90 0:  1:uml1_UUID
1307         #05 L setup    0:OSC_uml1_ost1_mdsA  1:ost1_UUID  2:uml1_UUID
1308         #06 L add_uuid  nid=uml2@tcp(0x20000c0a80202) nal=90 0:  1:uml2_UUID
1309         #0x L add_uuid  nid=2@elan(0x1000000000002)   nal=90 0:  1:uml2_UUID
1310         #07 L add_conn 0:OSC_uml1_ost1_mdsA  1:uml2_UUID
1311         */
1312
1313         /* Pull failnid info out of params string */
1314         while (class_find_param(ptr, PARAM_FAILNODE, &ptr) == 0) {
1315                 while (class_parse_nid(ptr, &nid, &ptr) == 0) {
1316                         if (failnodeuuid == NULL) {
1317                                 /* We don't know the failover node name,
1318                                    so just use the first nid as the uuid */
1319                                 rc = name_create(&failnodeuuid,
1320                                                  libcfs_nid2str(nid), "");
1321                                 if (rc)
1322                                         return rc;
1323                         }
1324                         CDEBUG(D_MGS, "add nid %s for failover uuid %s, "
1325                                "client %s\n", libcfs_nid2str(nid),
1326                                failnodeuuid, cliname);
1327                         rc = record_add_uuid(obd, llh, nid, failnodeuuid);
1328                 }
1329                 if (failnodeuuid) {
1330                         rc = record_add_conn(obd, llh, cliname, failnodeuuid);
1331                         name_destroy(&failnodeuuid);
1332                         failnodeuuid = NULL;
1333                 }
1334         }
1335
1336         return rc;
1337 }
1338
1339 static int mgs_write_log_mdc_to_lmv(struct obd_device *obd, struct fs_db *fsdb,
1340                                     struct mgs_target_info *mti,
1341                                     char *logname, char *lmvname)
1342 {
1343         struct llog_handle *llh = NULL;
1344         char *mdcname, *nodeuuid, *mdcuuid, *lmvuuid;
1345         char index[5];
1346         int i, rc;
1347         ENTRY;
1348
1349         if (mgs_log_is_empty(obd, logname)) {
1350                 CERROR("log is empty! Logical error\n");
1351                 RETURN(-EINVAL);
1352         }
1353
1354         CDEBUG(D_MGS, "adding mdc for %s to log %s:lmv(%s)\n",
1355                mti->mti_svname, logname, lmvname);
1356
1357         name_create(&nodeuuid, libcfs_nid2str(mti->mti_nids[0]), "");
1358         name_create(&mdcname, mti->mti_svname, "-mdc");
1359         name_create(&mdcuuid, mdcname, "_UUID");
1360         name_create(&lmvuuid, lmvname, "_UUID");
1361
1362         rc = record_start_log(obd, &llh, logname);
1363         rc = record_marker(obd, llh, fsdb, CM_START, mti->mti_svname,
1364                            "add mdc");
1365
1366         for (i = 0; i < mti->mti_nid_count; i++) {
1367                 CDEBUG(D_MGS, "add nid %s for mdt\n",
1368                        libcfs_nid2str(mti->mti_nids[i]));
1369
1370                 rc = record_add_uuid(obd, llh, mti->mti_nids[i], nodeuuid);
1371         }
1372
1373         rc = record_attach(obd, llh, mdcname, LUSTRE_MDC_NAME, lmvuuid);
1374         rc = record_setup(obd, llh, mdcname, mti->mti_uuid, nodeuuid, 0, 0);
1375         rc = mgs_write_log_failnids(obd, mti, llh, mdcname);
1376         snprintf(index, sizeof(index), "%d", mti->mti_stripe_index);
1377         rc = record_mdc_add(obd, llh, lmvname, mdcuuid, mti->mti_uuid,
1378                             index, "1");
1379         rc = record_marker(obd, llh, fsdb, CM_END, mti->mti_svname,
1380                            "add mdc");
1381         rc = record_end_log(obd, &llh);
1382
1383         name_destroy(&lmvuuid);
1384         name_destroy(&mdcuuid);
1385         name_destroy(&mdcname);
1386         name_destroy(&nodeuuid);
1387         RETURN(rc);
1388 }
1389
1390 /* add new mdc to already existent MDS */
1391 static int mgs_write_log_mdc_to_mdt(struct obd_device *obd, struct fs_db *fsdb,
1392                                     struct mgs_target_info *mti, char *logname)
1393 {
1394         struct llog_handle *llh = NULL;
1395         char *nodeuuid, *mdcname, *mdcuuid, *mdtuuid;
1396         int idx = mti->mti_stripe_index;
1397         char index[9];
1398         int i, rc;
1399
1400         ENTRY;
1401         if (mgs_log_is_empty(obd, mti->mti_svname)) {
1402                 CERROR("log is empty! Logical error\n");
1403                 RETURN (-EINVAL);
1404         }
1405
1406         CDEBUG(D_MGS, "adding mdc index %d to %s\n", idx, logname);
1407
1408         name_create(&nodeuuid, libcfs_nid2str(mti->mti_nids[0]), "");
1409         snprintf(index, sizeof(index), "-mdc%04x", idx);
1410         name_create(&mdcname, logname, index);
1411         name_create(&mdcuuid, mdcname, "_UUID");
1412         name_create(&mdtuuid, logname, "_UUID");
1413
1414         rc = record_start_log(obd, &llh, logname);
1415         rc = record_marker(obd, llh, fsdb, CM_START, mti->mti_svname, "add mdc");
1416         for (i = 0; i < mti->mti_nid_count; i++) {
1417                 CDEBUG(D_MGS, "add nid %s for mdt\n",
1418                        libcfs_nid2str(mti->mti_nids[i]));
1419                 rc = record_add_uuid(obd, llh, mti->mti_nids[i], nodeuuid);
1420         }
1421         rc = record_attach(obd, llh, mdcname, LUSTRE_MDC_NAME, mdcuuid);
1422         rc = record_setup(obd, llh, mdcname, mti->mti_uuid, nodeuuid, 0, 0);
1423         rc = mgs_write_log_failnids(obd, mti, llh, mdcname);
1424         snprintf(index, sizeof(index), "%d", idx);
1425
1426         rc = record_mdc_add(obd, llh, logname, mdcuuid, mti->mti_uuid,
1427                             index, "1");
1428         rc = record_marker(obd, llh, fsdb, CM_END, mti->mti_svname, "add mdc");
1429         rc = record_end_log(obd, &llh);
1430
1431         name_destroy(&mdcuuid);
1432         name_destroy(&mdcname);
1433         name_destroy(&nodeuuid);
1434         name_destroy(&mdtuuid);
1435         RETURN(rc);
1436 }
1437
1438 static int mgs_write_log_mdt0(struct obd_device *obd, struct fs_db *fsdb,
1439                               struct mgs_target_info *mti)
1440 {
1441         char *log = mti->mti_svname;
1442         struct llog_handle *llh = NULL;
1443         char *uuid, *lovname;
1444         char mdt_index[5];
1445         char *ptr = mti->mti_params;
1446         int rc = 0, failout = 0;
1447         ENTRY;
1448
1449         OBD_ALLOC(uuid, sizeof(struct obd_uuid));
1450         if (uuid == NULL)
1451                 RETURN(-ENOMEM);
1452
1453         if (class_find_param(ptr, PARAM_FAILMODE, &ptr) == 0)
1454                 failout = (strncmp(ptr, "failout", 7) == 0);
1455
1456         name_create(&lovname, log, "-mdtlov");
1457         if (mgs_log_is_empty(obd, log))
1458                 rc = mgs_write_log_lov(obd, fsdb, mti, log, lovname);
1459
1460         sprintf(uuid, "%s_UUID", log);
1461         sprintf(mdt_index,"%d",mti->mti_stripe_index);
1462
1463         /* add MDT itself */
1464         rc = record_start_log(obd, &llh, log);
1465         if (rc)
1466                 GOTO(out, rc);
1467
1468         /* FIXME this whole fn should be a single journal transaction */
1469         rc = record_marker(obd, llh, fsdb, CM_START, log, "add mdt");
1470         rc = record_attach(obd, llh, log, LUSTRE_MDT_NAME, uuid);
1471         rc = record_mount_opt(obd, llh, log, lovname, NULL);
1472         rc = record_setup(obd, llh, log, uuid, mdt_index, lovname,
1473                         failout ? "n" : "f");
1474         rc = record_marker(obd, llh, fsdb, CM_END, log, "add mdt");
1475         rc = record_end_log(obd, &llh);
1476 out:
1477         name_destroy(&lovname);
1478         OBD_FREE(uuid, sizeof(struct obd_uuid));
1479         RETURN(rc);
1480 }
1481
1482 /* envelope method for all layers log */
1483 static int mgs_write_log_mdt(struct obd_device *obd, struct fs_db *fsdb,
1484                               struct mgs_target_info *mti)
1485 {
1486         struct llog_handle *llh = NULL;
1487         char *cliname;
1488         struct temp_comp comp = { 0 };
1489         char mdt_index[9];
1490         int rc, i = 0;
1491         ENTRY;
1492
1493         CDEBUG(D_MGS, "writing new mdt %s\n", mti->mti_svname);
1494
1495 #if 0
1496         /* COMPAT_146 */
1497         if (mti->mti_flags & LDD_F_UPGRADE14) {
1498                 /* We're starting with an old uuid.  Assume old name for lov
1499                    as well since the lov entry already exists in the log. */
1500                 CDEBUG(D_MGS, "old mds uuid %s\n", mti->mti_uuid);
1501                 if (strncmp(mti->mti_uuid, fsdb->fsdb_mdtlov + 4,
1502                             strlen(fsdb->fsdb_mdtlov) - 4) != 0) {
1503                         CERROR("old mds uuid %s doesn't match log %s (%s)\n",
1504                                mti->mti_uuid, fsdb->fsdb_mdtlov,
1505                                fsdb->fsdb_mdtlov + 4);
1506                         RETURN(-EINVAL);
1507                 }
1508         }
1509         /* end COMPAT_146 */
1510 #endif
1511         if (mti->mti_uuid[0] == '\0') {
1512                 /* Make up our own uuid */
1513                 snprintf(mti->mti_uuid, sizeof(mti->mti_uuid),
1514                          "%s_UUID", mti->mti_svname);
1515         }
1516
1517         /* add mdt */
1518         rc = mgs_write_log_mdt0(obd, fsdb, mti);
1519
1520         /* Append the mdt info to the client log */
1521         name_create(&cliname, mti->mti_fsname, "-client");
1522
1523         if (mgs_log_is_empty(obd, cliname)) {
1524                 /* Start client log */
1525                 rc = mgs_write_log_lov(obd, fsdb, mti, cliname,
1526                                        fsdb->fsdb_clilov);
1527                 rc = mgs_write_log_lmv(obd, fsdb, mti, cliname,
1528                                        fsdb->fsdb_clilmv);
1529         }
1530
1531         /*
1532         #09 L add_uuid nid=uml1@tcp(0x20000c0a80201) 0:  1:uml1_UUID
1533         #10 L attach   0:MDC_uml1_mdsA_MNT_client  1:mdc  2:1d834_MNT_client_03f
1534         #11 L setup    0:MDC_uml1_mdsA_MNT_client  1:mdsA_UUID  2:uml1_UUID
1535         #12 L add_uuid nid=uml2@tcp(0x20000c0a80202) 0:  1:uml2_UUID
1536         #13 L add_conn 0:MDC_uml1_mdsA_MNT_client  1:uml2_UUID
1537         #14 L mount_option 0:  1:client  2:lov1  3:MDC_uml1_mdsA_MNT_client
1538         */
1539
1540 #if 0
1541         /* COMPAT_146 */
1542         if (mti->mti_flags & LDD_F_UPGRADE14) {
1543                 rc = record_start_log(obd, &llh, cliname);
1544                 if (rc)
1545                         GOTO(out, rc);
1546
1547                 rc = record_marker(obd, llh, fsdb, CM_START,
1548                                    mti->mti_svname,"add mdc");
1549
1550                 /* Old client log already has MDC entry, but needs mount opt
1551                    for new client name (lustre-client) */
1552                 /* FIXME Old MDT log already has an old mount opt
1553                    which we should remove (currently handled by
1554                    class_del_profiles()) */
1555                 rc = record_mount_opt(obd, llh, cliname, fsdb->fsdb_clilov,
1556                                       fsdb->fsdb_mdc);
1557                 /* end COMPAT_146 */
1558
1559                 rc = record_marker(obd, llh, fsdb, CM_END,
1560                                    mti->mti_svname, "add mdc");
1561         } else
1562 #endif
1563         {
1564                 /* copy client info about lov/lmv */
1565                 comp.comp_mti = mti;
1566                 comp.comp_fsdb = fsdb;
1567
1568                 rc = mgs_steal_llog_for_mdt_from_client(obd, cliname,
1569                                                         &comp);
1570
1571                 rc = mgs_write_log_mdc_to_lmv(obd, fsdb, mti, cliname,
1572                                               fsdb->fsdb_clilmv);
1573                 /* add mountopts */
1574                 rc = record_start_log(obd, &llh, cliname);
1575                 if (rc)
1576                         GOTO(out, rc);
1577
1578                 rc = record_marker(obd, llh, fsdb, CM_START, cliname,
1579                                    "mount opts");
1580                 rc = record_mount_opt(obd, llh, cliname, fsdb->fsdb_clilov,
1581                                       fsdb->fsdb_clilmv);
1582                 rc = record_marker(obd, llh, fsdb, CM_END, cliname,
1583                                    "mount opts");
1584         }
1585
1586         rc = record_end_log(obd, &llh);
1587 out:
1588         name_destroy(&cliname);
1589
1590         // for_all_existing_mdt except current one
1591         for (i = 0; i < INDEX_MAP_SIZE * 8; i++){
1592                 char *mdtname;
1593                 if (i !=  mti->mti_stripe_index &&
1594                     test_bit(i,  fsdb->fsdb_mdt_index_map)) {
1595                         sprintf(mdt_index,"-MDT%04x",i);
1596
1597                         name_create(&mdtname, mti->mti_fsname, mdt_index);
1598                         rc = mgs_write_log_mdc_to_mdt(obd, fsdb, mti, mdtname);
1599                         name_destroy(&mdtname);
1600                 }
1601         }
1602
1603         RETURN(rc);
1604 }
1605
1606 /* Add the ost info to the client/mdt lov */
1607 static int mgs_write_log_osc_to_lov(struct obd_device *obd, struct fs_db *fsdb,
1608                                     struct mgs_target_info *mti,
1609                                     char *logname, char *suffix, char *lovname,
1610                                     enum lustre_sec_part sec_part, int flags)
1611 {
1612         struct llog_handle *llh = NULL;
1613         char *nodeuuid, *oscname, *oscuuid, *lovuuid, *svname;
1614         char index[5];
1615         int i, rc;
1616
1617         ENTRY;
1618         CDEBUG(D_INFO, "adding osc for %s to log %s\n",
1619                mti->mti_svname, logname);
1620
1621         if (mgs_log_is_empty(obd, logname)) {
1622                 /* The first item in the log must be the lov, so we have
1623                    somewhere to add our osc. */
1624                 rc = mgs_write_log_lov(obd, fsdb, mti, logname, lovname);
1625         }
1626
1627         name_create(&nodeuuid, libcfs_nid2str(mti->mti_nids[0]), "");
1628         name_create(&svname, mti->mti_svname, "-osc");
1629         name_create(&oscname, svname, suffix);
1630         name_create(&oscuuid, oscname, "_UUID");
1631         name_create(&lovuuid, lovname, "_UUID");
1632
1633         /*
1634         #03 L add_uuid nid=uml1@tcp(0x20000c0a80201) 0:  1:uml1_UUID
1635         multihomed (#4)
1636         #04 L add_uuid  nid=1@elan(0x1000000000001)  nal=90 0:  1:uml1_UUID
1637         #04 L attach   0:OSC_uml1_ost1_MNT_client  1:osc  2:89070_lov1_a41dff51a
1638         #05 L setup    0:OSC_uml1_ost1_MNT_client  1:ost1_UUID  2:uml1_UUID
1639         failover (#6,7)
1640         #06 L add_uuid nid=uml2@tcp(0x20000c0a80202) 0:  1:uml2_UUID
1641         #07 L add_conn 0:OSC_uml1_ost1_MNT_client  1:uml2_UUID
1642         #08 L lov_modify_tgts add 0:lov1  1:ost1_UUID  2(index):0  3(gen):1
1643         */
1644
1645         rc = record_start_log(obd, &llh, logname);
1646         if (rc)
1647                 GOTO(out, rc);
1648         /* FIXME these should be a single journal transaction */
1649         rc = record_marker(obd, llh, fsdb, CM_START | flags, mti->mti_svname,
1650                            "add osc");
1651         for (i = 0; i < mti->mti_nid_count; i++) {
1652                 CDEBUG(D_MGS, "add nid %s\n", libcfs_nid2str(mti->mti_nids[i]));
1653                 rc = record_add_uuid(obd, llh, mti->mti_nids[i], nodeuuid);
1654         }
1655         rc = record_attach(obd, llh, oscname, LUSTRE_OSC_NAME, lovuuid);
1656         rc = record_setup(obd, llh, oscname, mti->mti_uuid, nodeuuid, 0, 0);
1657         rc = mgs_write_log_failnids(obd, mti, llh, oscname);
1658         snprintf(index, sizeof(index), "%d", mti->mti_stripe_index);
1659         rc = record_lov_add(obd, llh, lovname, mti->mti_uuid, index, "1");
1660         rc = record_marker(obd, llh, fsdb, CM_END | flags, mti->mti_svname,
1661                            "add osc");
1662         rc = record_end_log(obd, &llh);
1663 out:
1664         name_destroy(&lovuuid);
1665         name_destroy(&oscuuid);
1666         name_destroy(&oscname);
1667         name_destroy(&svname);
1668         name_destroy(&nodeuuid);
1669         RETURN(rc);
1670 }
1671
1672 static int mgs_write_log_ost(struct obd_device *obd, struct fs_db *fsdb,
1673                              struct mgs_target_info *mti)
1674 {
1675         struct llog_handle *llh = NULL;
1676         char *logname, *lovname;
1677         char mdt_index[9];
1678         char *ptr = mti->mti_params;
1679         int rc, flags = 0, failout = 0, i;
1680         ENTRY;
1681
1682         CDEBUG(D_MGS, "writing new ost %s\n", mti->mti_svname);
1683
1684         /* The ost startup log */
1685
1686         /* If the ost log already exists, that means that someone reformatted
1687            the ost and it called target_add again. */
1688         if (!mgs_log_is_empty(obd, mti->mti_svname)) {
1689                 LCONSOLE_ERROR_MSG(0x141, "The config log for %s already "
1690                                    "exists, yet the server claims it never "
1691                                    "registered. It may have been reformatted, "
1692                                    "or the index changed. writeconf the MDT to "
1693                                    "regenerate all logs.\n", mti->mti_svname);
1694                 RETURN(-EALREADY);
1695         }
1696
1697         /*
1698         attach obdfilter ost1 ost1_UUID
1699         setup /dev/loop2 ldiskfs f|n errors=remount-ro,user_xattr
1700         */
1701         if (class_find_param(ptr, PARAM_FAILMODE, &ptr) == 0)
1702                 failout = (strncmp(ptr, "failout", 7) == 0);
1703         rc = record_start_log(obd, &llh, mti->mti_svname);
1704         if (rc)
1705                 RETURN(rc);
1706         /* FIXME these should be a single journal transaction */
1707         rc = record_marker(obd, llh, fsdb, CM_START, mti->mti_svname,"add ost");
1708         if (*mti->mti_uuid == '\0')
1709                 snprintf(mti->mti_uuid, sizeof(mti->mti_uuid),
1710                          "%s_UUID", mti->mti_svname);
1711         rc = record_attach(obd, llh, mti->mti_svname,
1712                            "obdfilter"/*LUSTRE_OST_NAME*/, mti->mti_uuid);
1713         rc = record_setup(obd, llh, mti->mti_svname,
1714                           "dev"/*ignored*/, "type"/*ignored*/,
1715                           failout ? "n" : "f", 0/*options*/);
1716         rc = record_marker(obd, llh, fsdb, CM_END, mti->mti_svname, "add ost");
1717         rc = record_end_log(obd, &llh);
1718
1719         /* We also have to update the other logs where this osc is part of
1720            the lov */
1721
1722         if (fsdb->fsdb_flags & FSDB_OLDLOG14) {
1723                 /* If we're upgrading, the old mdt log already has our
1724                    entry. Let's do a fake one for fun. */
1725                 /* Note that we can't add any new failnids, since we don't
1726                    know the old osc names. */
1727                 flags = CM_SKIP | CM_UPGRADE146;
1728
1729         } else if ((mti->mti_flags & LDD_F_UPDATE) != LDD_F_UPDATE) {
1730                 /* If the update flag isn't set, don't update client/mdt
1731                    logs. */
1732                 flags |= CM_SKIP;
1733                 LCONSOLE_WARN("Client log for %s was not updated; writeconf "
1734                               "the MDT first to regenerate it.\n",
1735                               mti->mti_svname);
1736         }
1737
1738         // for_all_existing_mdt
1739         for (i = 0; i < INDEX_MAP_SIZE * 8; i++){
1740                  if (test_bit(i,  fsdb->fsdb_mdt_index_map)) {
1741                         sprintf(mdt_index,"-MDT%04x",i);
1742                         name_create(&logname, mti->mti_fsname, mdt_index);
1743                         name_create(&lovname, logname, "-mdtlov");
1744                         mgs_write_log_osc_to_lov(obd, fsdb, mti, logname,
1745                                                  mdt_index, lovname,
1746                                                  LUSTRE_SP_MDT, flags);
1747                         name_destroy(&logname);
1748                         name_destroy(&lovname);
1749                 }
1750         }
1751
1752         /* Append ost info to the client log */
1753         name_create(&logname, mti->mti_fsname, "-client");
1754         mgs_write_log_osc_to_lov(obd, fsdb, mti, logname, "",
1755                                  fsdb->fsdb_clilov, LUSTRE_SP_CLI, 0);
1756         name_destroy(&logname);
1757         RETURN(rc);
1758 }
1759
1760 /* Add additional failnids to an existing log.
1761    The mdc/osc must have been added to logs first */
1762 /* tcp nids must be in dotted-quad ascii -
1763    we can't resolve hostnames from the kernel. */
1764 static int mgs_write_log_add_failnid(struct obd_device *obd, struct fs_db *fsdb,
1765                                      struct mgs_target_info *mti)
1766 {
1767         char *logname, *cliname;
1768         struct llog_handle *llh = NULL;
1769         int rc;
1770         ENTRY;
1771
1772         /* FIXME how do we delete a failnid? Currently --writeconf is the
1773            only way.  Maybe make --erase-params pass a flag to really
1774            erase all params from logs - except it can't erase the failnids
1775            given when a target first registers, since they aren't processed
1776            as params... */
1777
1778         /* Verify that we know about this target */
1779         if (mgs_log_is_empty(obd, mti->mti_svname)) {
1780                 LCONSOLE_ERROR_MSG(0x142, "The target %s has not registered "
1781                                    "yet. It must be started before failnids "
1782                                    "can be added.\n", mti->mti_svname);
1783                 RETURN(-ENOENT);
1784         }
1785
1786         /* Create mdc/osc client name (e.g. lustre-OST0001-osc) */
1787         if (mti->mti_flags & LDD_F_SV_TYPE_MDT) {
1788                 name_create(&cliname, mti->mti_svname, "-mdc");
1789         } else if (mti->mti_flags & LDD_F_SV_TYPE_OST) {
1790                 name_create(&cliname, mti->mti_svname, "-osc");
1791         } else {
1792                 RETURN(-EINVAL);
1793         }
1794
1795         /* Add failover nids to client log */
1796         name_create(&logname, mti->mti_fsname, "-client");
1797         rc = record_start_log(obd, &llh, logname);
1798         if (!rc) {
1799                 /* FIXME this fn should be a single journal transaction */
1800                 rc = record_marker(obd, llh, fsdb, CM_START, mti->mti_svname,
1801                                    "add failnid");
1802                 rc = mgs_write_log_failnids(obd, mti, llh, cliname);
1803                 rc = record_marker(obd, llh, fsdb, CM_END, mti->mti_svname,
1804                                    "add failnid");
1805                 rc = record_end_log(obd, &llh);
1806         }
1807         name_destroy(&logname);
1808
1809         if (mti->mti_flags & LDD_F_SV_TYPE_OST) {
1810                 /* Add OST failover nids to the MDT log as well */
1811                 name_create(&logname, mti->mti_fsname, "-MDT0000");
1812                 rc = record_start_log(obd, &llh, logname);
1813                 if (!rc) {
1814                         rc = record_marker(obd, llh, fsdb, CM_START,
1815                                            mti->mti_svname, "add failnid");
1816                         rc = mgs_write_log_failnids(obd, mti, llh, cliname);
1817                         rc = record_marker(obd, llh, fsdb, CM_END,
1818                                            mti->mti_svname, "add failnid");
1819                         rc = record_end_log(obd, &llh);
1820                 }
1821                 name_destroy(&logname);
1822         }
1823
1824         name_destroy(&cliname);
1825         RETURN(rc);
1826 }
1827
1828 static int mgs_wlp_lcfg(struct obd_device *obd, struct fs_db *fsdb,
1829                         struct mgs_target_info *mti,
1830                         char *logname, struct lustre_cfg_bufs *bufs,
1831                         char *tgtname, char *ptr)
1832 {
1833         char comment[MTI_NAME_MAXLEN];
1834         char *tmp;
1835         struct lustre_cfg *lcfg;
1836         int rc;
1837
1838         /* Erase any old settings of this same parameter */
1839         memcpy(comment, ptr, MTI_NAME_MAXLEN);
1840         comment[MTI_NAME_MAXLEN - 1] = 0;
1841         /* But don't try to match the value. */
1842         if ((tmp = strchr(comment, '=')))
1843             *tmp = 0;
1844         /* FIXME we should skip settings that are the same as old values */
1845         rc = mgs_modify(obd, fsdb, mti, logname, tgtname, comment, CM_SKIP);
1846         LCONSOLE_INFO("%sing parameter %s.%s in log %s\n", rc ?
1847                       "Sett" : "Modify", tgtname, comment, logname);
1848
1849         lustre_cfg_bufs_reset(bufs, tgtname);
1850         lustre_cfg_bufs_set_string(bufs, 1, ptr);
1851         lcfg = lustre_cfg_new(LCFG_PARAM, bufs);
1852         if (!lcfg)
1853                 return -ENOMEM;
1854         rc = mgs_write_log_direct(obd, fsdb, logname, lcfg, tgtname, comment);
1855         lustre_cfg_free(lcfg);
1856         return rc;
1857 }
1858
1859 static int mgs_srpc_set_param_disk(struct obd_device *obd,
1860                                    struct fs_db *fsdb,
1861                                    struct mgs_target_info *mti,
1862                                    char *param)
1863 {
1864         struct llog_handle     *llh = NULL;
1865         char                   *logname;
1866         char                   *comment, *ptr;
1867         struct lustre_cfg_bufs  bufs;
1868         struct lustre_cfg      *lcfg;
1869         int                     rc, len;
1870         ENTRY;
1871
1872         /* get comment */
1873         ptr = strchr(param, '=');
1874         LASSERT(ptr);
1875         len = ptr - param;
1876
1877         OBD_ALLOC(comment, len + 1);
1878         if (comment == NULL)
1879                 RETURN(-ENOMEM);
1880         strncpy(comment, param, len);
1881         comment[len] = '\0';
1882
1883         /* prepare lcfg */
1884         lustre_cfg_bufs_reset(&bufs, mti->mti_svname);
1885         lustre_cfg_bufs_set_string(&bufs, 1, param);
1886         lcfg = lustre_cfg_new(LCFG_SPTLRPC_CONF, &bufs);
1887         if (lcfg == NULL)
1888                 GOTO(out_comment, rc = -ENOMEM);
1889
1890         /* construct log name */
1891         rc = name_create(&logname, mti->mti_fsname, "-sptlrpc");
1892         if (rc)
1893                 GOTO(out_lcfg, rc);
1894
1895         if (mgs_log_is_empty(obd, logname)) {
1896                 rc = record_start_log(obd, &llh, logname);
1897                 record_end_log(obd, &llh);
1898                 if (rc)
1899                         GOTO(out, rc);
1900         }
1901
1902         /* obsolete old one */
1903         mgs_modify(obd, fsdb, mti, logname, mti->mti_svname, comment, CM_SKIP);
1904
1905         /* write the new one */
1906         rc = mgs_write_log_direct(obd, fsdb, logname, lcfg,
1907                                   mti->mti_svname, comment);
1908         if (rc)
1909                 CERROR("err %d writing log %s\n", rc, logname);
1910
1911 out:
1912         name_destroy(&logname);
1913 out_lcfg:
1914         lustre_cfg_free(lcfg);
1915 out_comment:
1916         OBD_FREE(comment, len + 1);
1917         RETURN(rc);
1918 }
1919
1920 static int mgs_srpc_set_param_udesc_mem(struct fs_db *fsdb,
1921                                         char *param)
1922 {
1923         char    *ptr;
1924
1925         /* disable the adjustable udesc parameter for now, i.e. use default
1926          * setting that client always ship udesc to MDT if possible. to enable
1927          * it simply remove the following line */
1928         goto error_out;
1929
1930         ptr = strchr(param, '=');
1931         if (ptr == NULL)
1932                 goto error_out;
1933         *ptr++ = '\0';
1934
1935         if (strcmp(param, PARAM_SRPC_UDESC))
1936                 goto error_out;
1937
1938         if (strcmp(ptr, "yes") == 0) {
1939                 fsdb->fsdb_fl_udesc = 1;
1940                 CWARN("Enable user descriptor shipping from client to MDT\n");
1941         } else if (strcmp(ptr, "no") == 0) {
1942                 fsdb->fsdb_fl_udesc = 0;
1943                 CWARN("Disable user descriptor shipping from client to MDT\n");
1944         } else {
1945                 *(ptr - 1) = '=';
1946                 goto error_out;
1947         }
1948         return 0;
1949
1950 error_out:
1951         CERROR("Invalid param: %s\n", param);
1952         return -EINVAL;
1953 }
1954
1955 static int mgs_srpc_set_param_mem(struct fs_db *fsdb,
1956                                   const char *svname,
1957                                   char *param)
1958 {
1959         struct sptlrpc_rule      rule;
1960         struct sptlrpc_rule_set *rset;
1961         int                      rc;
1962         ENTRY;
1963
1964         if (strncmp(param, PARAM_SRPC, sizeof(PARAM_SRPC) - 1) != 0) {
1965                 CERROR("Invalid sptlrpc parameter: %s\n", param);
1966                 RETURN(-EINVAL);
1967         }
1968
1969         if (strncmp(param, PARAM_SRPC_UDESC,
1970                     sizeof(PARAM_SRPC_UDESC) - 1) == 0) {
1971                 RETURN(mgs_srpc_set_param_udesc_mem(fsdb, param));
1972         }
1973
1974         if (strncmp(param, PARAM_SRPC_FLVR, sizeof(PARAM_SRPC_FLVR) - 1) != 0) {
1975                 CERROR("Invalid sptlrpc flavor parameter: %s\n", param);
1976                 RETURN(-EINVAL);
1977         }
1978
1979         param += sizeof(PARAM_SRPC_FLVR) - 1;
1980
1981         rc = sptlrpc_parse_rule(param, &rule);
1982         if (rc)
1983                 RETURN(rc);
1984
1985         /* mgs rules implies must be mgc->mgs */
1986         if (fsdb->fsdb_fl_mgsself) {
1987                 if ((rule.sr_from != LUSTRE_SP_MGC &&
1988                      rule.sr_from != LUSTRE_SP_ANY) ||
1989                     (rule.sr_to != LUSTRE_SP_MGS &&
1990                      rule.sr_to != LUSTRE_SP_ANY))
1991                         RETURN(-EINVAL);
1992         }
1993
1994         /* preapre room for this coming rule. svcname format should be:
1995          * - fsname: general rule
1996          * - fsname-tgtname: target-specific rule
1997          */
1998         if (strchr(svname, '-')) {
1999                 struct mgs_tgt_srpc_conf *tgtconf;
2000                 int                       found = 0;
2001
2002                 for (tgtconf = fsdb->fsdb_srpc_tgt; tgtconf != NULL;
2003                      tgtconf = tgtconf->mtsc_next) {
2004                         if (!strcmp(tgtconf->mtsc_tgt, svname)) {
2005                                 found = 1;
2006                                 break;
2007                         }
2008                 }
2009
2010                 if (!found) {
2011                         int name_len;
2012
2013                         OBD_ALLOC_PTR(tgtconf);
2014                         if (tgtconf == NULL)
2015                                 RETURN(-ENOMEM);
2016
2017                         name_len = strlen(svname);
2018
2019                         OBD_ALLOC(tgtconf->mtsc_tgt, name_len + 1);
2020                         if (tgtconf->mtsc_tgt == NULL) {
2021                                 OBD_FREE_PTR(tgtconf);
2022                                 RETURN(-ENOMEM);
2023                         }
2024                         memcpy(tgtconf->mtsc_tgt, svname, name_len);
2025
2026                         tgtconf->mtsc_next = fsdb->fsdb_srpc_tgt;
2027                         fsdb->fsdb_srpc_tgt = tgtconf;
2028                 }
2029
2030                 rset = &tgtconf->mtsc_rset;
2031         } else {
2032                 rset = &fsdb->fsdb_srpc_gen;
2033         }
2034
2035         rc = sptlrpc_rule_set_merge(rset, &rule);
2036
2037         RETURN(rc);
2038 }
2039
2040 static int mgs_srpc_set_param(struct obd_device *obd,
2041                               struct fs_db *fsdb,
2042                               struct mgs_target_info *mti,
2043                               char *param)
2044 {
2045         char                   *copy;
2046         int                     rc, copy_size;
2047         ENTRY;
2048
2049 #ifndef HAVE_GSS
2050         RETURN(-EINVAL);
2051 #endif
2052         /* keep a copy of original param, which could be destroied
2053          * during parsing */
2054         copy_size = strlen(param) + 1;
2055         OBD_ALLOC(copy, copy_size);
2056         if (copy == NULL)
2057                 return -ENOMEM;
2058         memcpy(copy, param, copy_size);
2059
2060         rc = mgs_srpc_set_param_mem(fsdb, mti->mti_svname, param);
2061         if (rc)
2062                 goto out_free;
2063
2064         /* previous steps guaranteed the syntax is correct */
2065         rc = mgs_srpc_set_param_disk(obd, fsdb, mti, copy);
2066         if (rc)
2067                 goto out_free;
2068
2069         if (fsdb->fsdb_fl_mgsself) {
2070                 /*
2071                  * for mgs rules, make them effective immediately.
2072                  */
2073                 LASSERT(fsdb->fsdb_srpc_tgt == NULL);
2074                 sptlrpc_target_update_exp_flavor(obd, &fsdb->fsdb_srpc_gen);
2075         }
2076
2077 out_free:
2078         OBD_FREE(copy, copy_size);
2079         RETURN(rc);
2080 }
2081
2082 struct mgs_srpc_read_data {
2083         struct fs_db   *msrd_fsdb;
2084         int             msrd_skip;
2085 };
2086
2087 static int mgs_srpc_read_handler(struct llog_handle *llh,
2088                                  struct llog_rec_hdr *rec,
2089                                  void *data)
2090 {
2091         struct mgs_srpc_read_data *msrd = (struct mgs_srpc_read_data *) data;
2092         struct cfg_marker         *marker;
2093         struct lustre_cfg         *lcfg = (struct lustre_cfg *)(rec + 1);
2094         char                      *svname, *param;
2095         int                        cfg_len, rc;
2096         ENTRY;
2097
2098         if (rec->lrh_type != OBD_CFG_REC) {
2099                 CERROR("unhandled lrh_type: %#x\n", rec->lrh_type);
2100                 RETURN(-EINVAL);
2101         }
2102
2103         cfg_len = rec->lrh_len - sizeof(struct llog_rec_hdr) -
2104                   sizeof(struct llog_rec_tail);
2105
2106         rc = lustre_cfg_sanity_check(lcfg, cfg_len);
2107         if (rc) {
2108                 CERROR("Insane cfg\n");
2109                 RETURN(rc);
2110         }
2111
2112         if (lcfg->lcfg_command == LCFG_MARKER) {
2113                 marker = lustre_cfg_buf(lcfg, 1);
2114
2115                 if (marker->cm_flags & CM_START &&
2116                     marker->cm_flags & CM_SKIP)
2117                         msrd->msrd_skip = 1;
2118                 if (marker->cm_flags & CM_END)
2119                         msrd->msrd_skip = 0;
2120
2121                 RETURN(0);
2122         }
2123
2124         if (msrd->msrd_skip)
2125                 RETURN(0);
2126
2127         if (lcfg->lcfg_command != LCFG_SPTLRPC_CONF) {
2128                 CERROR("invalid command (%x)\n", lcfg->lcfg_command);
2129                 RETURN(0);
2130         }
2131
2132         svname = lustre_cfg_string(lcfg, 0);
2133         if (svname == NULL) {
2134                 CERROR("svname is empty\n");
2135                 RETURN(0);
2136         }
2137
2138         param = lustre_cfg_string(lcfg, 1);
2139         if (param == NULL) {
2140                 CERROR("param is empty\n");
2141                 RETURN(0);
2142         }
2143
2144         rc = mgs_srpc_set_param_mem(msrd->msrd_fsdb, svname, param);
2145         if (rc)
2146                 CERROR("read sptlrpc record error (%d): %s\n", rc, param);
2147
2148         RETURN(0);
2149 }
2150
2151 int mgs_get_fsdb_srpc_from_llog(struct obd_device *obd,
2152                                 struct fs_db *fsdb)
2153 {
2154         struct llog_handle        *llh = NULL;
2155         struct lvfs_run_ctxt       saved;
2156         struct llog_ctxt          *ctxt;
2157         char                      *logname;
2158         struct mgs_srpc_read_data  msrd;
2159         int                        rc;
2160         ENTRY;
2161
2162         /* construct log name */
2163         rc = name_create(&logname, fsdb->fsdb_name, "-sptlrpc");
2164         if (rc)
2165                 RETURN(rc);
2166
2167         ctxt = llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
2168         LASSERT(ctxt != NULL);
2169
2170         if (mgs_log_is_empty(obd, logname))
2171                 GOTO(out, rc = 0);
2172
2173         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
2174
2175         rc = llog_create(ctxt, &llh, NULL, logname);
2176         if (rc)
2177                 GOTO(out_pop, rc);
2178
2179         rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
2180         if (rc)
2181                 GOTO(out_close, rc);
2182
2183         if (llog_get_size(llh) <= 1)
2184                 GOTO(out_close, rc = 0);
2185
2186         msrd.msrd_fsdb = fsdb;
2187         msrd.msrd_skip = 0;
2188
2189         rc = llog_process(llh, mgs_srpc_read_handler, (void *) &msrd, NULL);
2190
2191 out_close:
2192         llog_close(llh);
2193 out_pop:
2194         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
2195 out:
2196         llog_ctxt_put(ctxt);
2197         name_destroy(&logname);
2198
2199         if (rc)
2200                 CERROR("failed to read sptlrpc config database: %d\n", rc);
2201         RETURN(rc);
2202 }
2203
2204 static int mgs_write_log_param(struct obd_device *obd, struct fs_db *fsdb,
2205                                struct mgs_target_info *mti, char *ptr)
2206 {
2207         struct lustre_cfg_bufs bufs;
2208         struct lustre_cfg *lcfg;
2209         char *logname;
2210         char *tmp;
2211         int rc = 0;
2212         ENTRY;
2213
2214         /* For various parameter settings, we have to figure out which logs
2215            care about them (e.g. both mdt and client for lov settings) */
2216         CDEBUG(D_MGS, "next param '%s'\n", ptr);
2217
2218         /* The params are stored in MOUNT_DATA_FILE and modified via
2219            tunefs.lustre, or set using lctl conf_param */
2220
2221         /* Processed in lustre_start_mgc */
2222         if (class_match_param(ptr, PARAM_MGSNODE, NULL) == 0)
2223                 GOTO(end, rc);
2224
2225         /* Processed in mgs_write_log_ost */
2226         if (class_match_param(ptr, PARAM_FAILMODE, NULL) == 0) {
2227                 if (mti->mti_flags & LDD_F_PARAM) {
2228                         LCONSOLE_ERROR_MSG(0x169, "%s can only be "
2229                                            "changed with tunefs.lustre"
2230                                            "and --writeconf\n", ptr);
2231                         rc = -EPERM;
2232                 }
2233                 GOTO(end, rc);
2234         }
2235
2236         if (class_match_param(ptr, PARAM_SRPC, NULL) == 0) {
2237                 rc = mgs_srpc_set_param(obd, fsdb, mti, ptr);
2238                 GOTO(end, rc);
2239         }
2240
2241         if (class_match_param(ptr, PARAM_FAILNODE, NULL) == 0) {
2242                 /* Add a failover nidlist */
2243                 rc = 0;
2244                 /* We already processed failovers params for new
2245                    targets in mgs_write_log_target */
2246                 if (mti->mti_flags & LDD_F_PARAM) {
2247                         CDEBUG(D_MGS, "Adding failnode\n");
2248                         rc = mgs_write_log_add_failnid(obd, fsdb, mti);
2249                 }
2250                 GOTO(end, rc);
2251         }
2252
2253         if (class_match_param(ptr, PARAM_SYS_TIMEOUT, &tmp) == 0) {
2254                 /* Change obd timeout */
2255                 int timeout;
2256                 timeout = simple_strtoul(tmp, NULL, 0);
2257
2258                 CDEBUG(D_MGS, "obd timeout %d\n", timeout);
2259                 lustre_cfg_bufs_reset(&bufs, NULL);
2260                 lcfg = lustre_cfg_new(LCFG_SET_TIMEOUT, &bufs);
2261                 lcfg->lcfg_num = timeout;
2262                 /* modify all servers and clients */
2263                 rc = mgs_write_log_direct_all(obd, fsdb, mti, lcfg,
2264                                               mti->mti_fsname,
2265                                               "timeout");
2266                 lustre_cfg_free(lcfg);
2267                 GOTO(end, rc);
2268         }
2269
2270         if (class_match_param(ptr, PARAM_OSC""PARAM_ACTIVE, &tmp) == 0) {
2271                 /* active=0 means off, anything else means on */
2272                 char mdt_index[16];
2273                 int flag = (*tmp == '0') ? CM_EXCLUDE : 0;
2274                 int i;
2275
2276                 if (!(mti->mti_flags & LDD_F_SV_TYPE_OST)) {
2277                         LCONSOLE_ERROR_MSG(0x144, "%s: Only OSCs can "
2278                                            "be (de)activated.\n",
2279                                            mti->mti_svname);
2280                         GOTO(end, rc = -EINVAL);
2281                 }
2282                 LCONSOLE_WARN("Permanently %sactivating %s\n",
2283                               flag ? "de": "re", mti->mti_svname);
2284                 /* Modify clilov */
2285                 name_create(&logname, mti->mti_fsname, "-client");
2286                 rc = mgs_modify(obd, fsdb, mti, logname,
2287                                 mti->mti_svname, "add osc", flag);
2288                 name_destroy(&logname);
2289                 if (rc)
2290                         goto active_err;
2291                 /* Modify mdtlov */
2292                 /* FIXME add to all MDT logs for CMD */
2293                 for (i = 0; i < INDEX_MAP_SIZE * 8; i++) {
2294                         if (!test_bit(i, fsdb->fsdb_mdt_index_map))
2295                                 continue;
2296                         sprintf(mdt_index,"-MDT%04x", i);
2297                         name_create(&logname, mti->mti_fsname, mdt_index);
2298                         rc = mgs_modify(obd, fsdb, mti, logname,
2299                                         mti->mti_svname, "add osc", flag);
2300                         name_destroy(&logname);
2301                         if (rc)
2302                                 goto active_err;
2303                 }
2304         active_err:
2305                 if (rc) {
2306                         LCONSOLE_ERROR_MSG(0x145, "Couldn't find %s in"
2307                                            "log (%d). No permanent "
2308                                            "changes were made to the "
2309                                            "config log.\n",
2310                                            mti->mti_svname, rc);
2311                         if (fsdb->fsdb_flags & FSDB_OLDLOG14)
2312                                 LCONSOLE_ERROR_MSG(0x146, "This may be"
2313                                                    " because the log"
2314                                                    "is in the old 1.4"
2315                                                    "style. Consider "
2316                                                    " --writeconf to "
2317                                                    "update the logs.\n");
2318                         GOTO(end, rc);
2319                 }
2320                 /* Fall through to osc proc for deactivating live OSC
2321                    on running MDT / clients. */
2322         }
2323         /* Below here, let obd's XXX_process_config methods handle it */
2324
2325         /* All lov. in proc */
2326         if (class_match_param(ptr, PARAM_LOV, NULL) == 0) {
2327                 char mdt_index[16];
2328                 char *mdtlovname;
2329
2330                 CDEBUG(D_MGS, "lov param %s\n", ptr);
2331                 if (!(mti->mti_flags & LDD_F_SV_TYPE_MDT)) {
2332                         LCONSOLE_ERROR_MSG(0x147, "LOV params must be "
2333                                            "set on the MDT, not %s. "
2334                                            "Ignoring.\n",
2335                                            mti->mti_svname);
2336                         GOTO(end, rc = 0);
2337                 }
2338
2339                 /* Modify mdtlov */
2340                 if (mgs_log_is_empty(obd, mti->mti_svname))
2341                         GOTO(end, rc = -ENODEV);
2342
2343                 sprintf(mdt_index,"-MDT%04x", mti->mti_stripe_index);
2344                 name_create(&logname, mti->mti_fsname, mdt_index);
2345                 name_create(&mdtlovname, logname, "-mdtlov");
2346                 rc = mgs_wlp_lcfg(obd, fsdb, mti, mti->mti_svname,
2347                                   &bufs, mdtlovname, ptr);
2348                 name_destroy(&logname);
2349                 name_destroy(&mdtlovname);
2350                 if (rc)
2351                         GOTO(end, rc);
2352
2353                 /* Modify clilov */
2354                 name_create(&logname, mti->mti_fsname, "-client");
2355                 rc = mgs_wlp_lcfg(obd, fsdb, mti, logname, &bufs,
2356                                   fsdb->fsdb_clilov, ptr);
2357                 name_destroy(&logname);
2358                 GOTO(end, rc);
2359         }
2360
2361         /* All osc., mdc., llite. params in proc */
2362         if ((class_match_param(ptr, PARAM_OSC, NULL) == 0) ||
2363             (class_match_param(ptr, PARAM_MDC, NULL) == 0) ||
2364             (class_match_param(ptr, PARAM_LLITE, NULL) == 0)) {
2365                 char *cname;
2366                 if (memcmp(ptr, PARAM_LLITE, strlen(PARAM_LLITE)) == 0) {
2367                         name_create(&cname, mti->mti_fsname, "-client");
2368                         /* Add the client type to match the obdname in
2369                            class_config_llog_handler */
2370                 } else if (mti->mti_flags & LDD_F_SV_TYPE_MDT) {
2371                         /* COMPAT_146 */
2372                         if (fsdb->fsdb_mdc)
2373                                 name_create(&cname, fsdb->fsdb_mdc, "");
2374                         else
2375                                 name_create(&cname, mti->mti_svname,
2376                                             "-mdc");
2377                 } else if (mti->mti_flags & LDD_F_SV_TYPE_OST) {
2378                         /* COMPAT_146 */
2379                         if (fsdb->fsdb_flags & FSDB_OLDLOG14) {
2380                                 LCONSOLE_ERROR_MSG(0x148, "Upgraded "
2381                                                    "client logs for %s"
2382                                                    " cannot be "
2383                                                    "modified. Consider"
2384                                                    " updating the "
2385                                                    "configuration with"
2386                                                    " --writeconf\n",
2387                                                    mti->mti_svname);
2388                                 /* We don't know the names of all the
2389                                    old oscs*/
2390                                 GOTO(end, rc = -EINVAL);
2391                         }
2392                         name_create(&cname, mti->mti_svname, "-osc");
2393                 } else {
2394                         GOTO(end, rc = -EINVAL);
2395                 }
2396
2397                 CDEBUG(D_MGS, "%.3s param %s\n", ptr, ptr + 4);
2398
2399                 /* Modify client */
2400                 name_create(&logname, mti->mti_fsname, "-client");
2401                 rc = mgs_wlp_lcfg(obd, fsdb, mti, logname, &bufs,
2402                                   cname, ptr);
2403
2404                 /* osc params affect the MDT as well */
2405                 if (!rc && (mti->mti_flags & LDD_F_SV_TYPE_OST)) {
2406                         char mdt_index[16];
2407                         int i;
2408
2409                         for (i = 0; i < INDEX_MAP_SIZE * 8; i++){
2410                                 if (!test_bit(i, fsdb->fsdb_mdt_index_map))
2411                                         continue;
2412                                 name_destroy(&cname);
2413                                 sprintf(mdt_index, "-osc-MDT%04x", i);
2414                                 name_create(&cname, mti->mti_svname,
2415                                             mdt_index);
2416                                 name_destroy(&logname);
2417                                 sprintf(mdt_index, "-MDT%04x", i);
2418                                 name_create(&logname, mti->mti_fsname,
2419                                             mdt_index);
2420                                 if (!mgs_log_is_empty(obd, logname))
2421                                         rc = mgs_wlp_lcfg(obd, fsdb,
2422                                                           mti, logname,
2423                                                           &bufs, cname,
2424                                                           ptr);
2425                                 if (rc)
2426                                         break;
2427                         }
2428                 }
2429                 name_destroy(&logname);
2430                 name_destroy(&cname);
2431                 GOTO(end, rc);
2432         }
2433
2434         /* All mdt. params in proc */
2435         if (class_match_param(ptr, PARAM_MDT, NULL) == 0) {
2436                 char mdt_index[16];
2437                 int i;
2438                 __u32 idx;
2439
2440                 CDEBUG(D_MGS, "%.3s param %s\n", ptr, ptr + 4);
2441                 if (strncmp(mti->mti_svname, mti->mti_fsname,
2442                             MTI_NAME_MAXLEN) == 0)
2443                         /* device is unspecified completely? */
2444                         rc = LDD_F_SV_TYPE_MDT | LDD_F_SV_ALL;
2445                 else
2446                         rc = server_name2index(mti->mti_svname, &idx, NULL);
2447                 if (rc < 0)
2448                         goto active_err;
2449                 if ((rc & LDD_F_SV_TYPE_MDT) == 0)
2450                         goto active_err;
2451                 if (rc & LDD_F_SV_ALL) {
2452                         for (i = 0; i < INDEX_MAP_SIZE * 8; i++) {
2453                                 if (!test_bit(i,
2454                                               fsdb->fsdb_mdt_index_map))
2455                                         continue;
2456                                 sprintf(mdt_index,"-MDT%04x", i);
2457                                 name_create(&logname, mti->mti_fsname,
2458                                             mdt_index);
2459                                 rc = mgs_wlp_lcfg(obd, fsdb, mti,
2460                                                   logname, &bufs,
2461                                                   logname, ptr);
2462                                 name_destroy(&logname);
2463                                 if (rc)
2464                                         goto active_err;
2465                         }
2466                 } else {
2467                         rc = mgs_wlp_lcfg(obd, fsdb, mti,
2468                                           mti->mti_svname, &bufs,
2469                                           mti->mti_svname, ptr);
2470                         if (rc)
2471                                 goto active_err;
2472                 }
2473                 GOTO(end, rc);
2474         }
2475
2476         /* All mdd., ost. params in proc */
2477         if ((class_match_param(ptr, PARAM_MDD, NULL) == 0) ||
2478             (class_match_param(ptr, PARAM_OST, NULL) == 0)) {
2479                 CDEBUG(D_MGS, "%.3s param %s\n", ptr, ptr + 4);
2480                 if (mgs_log_is_empty(obd, mti->mti_svname))
2481                         GOTO(end, rc = -ENODEV);
2482
2483                 rc = mgs_wlp_lcfg(obd, fsdb, mti, mti->mti_svname,
2484                                   &bufs, mti->mti_svname, ptr);
2485                 GOTO(end, rc);
2486         }
2487
2488         LCONSOLE_WARN("Ignoring unrecognized param '%s'\n", ptr);
2489
2490 end:
2491         if (rc)
2492                 CERROR("err %d on param '%s'\n", rc, ptr);
2493
2494         RETURN(rc);
2495 }
2496
2497 /* Not implementing automatic failover nid addition at this time. */
2498 int mgs_check_failnid(struct obd_device *obd, struct mgs_target_info *mti)
2499 {
2500 #if 0
2501         struct fs_db *fsdb;
2502         int rc;
2503         ENTRY;
2504
2505         rc = mgs_find_or_make_fsdb(obd, fsname, &fsdb);
2506         if (rc)
2507                 RETURN(rc);
2508
2509         if (mgs_log_is_empty(obd, mti->mti_svname))
2510                 /* should never happen */
2511                 RETURN(-ENOENT);
2512
2513         CDEBUG(D_MGS, "Checking for new failnids for %s\n", mti->mti_svname);
2514
2515         /* FIXME We can just check mti->params to see if we're already in
2516            the failover list.  Modify mti->params for rewriting back at
2517            server_register_target(). */
2518
2519         down(&fsdb->fsdb_sem);
2520         rc = mgs_write_log_add_failnid(obd, fsdb, mti);
2521         up(&fsdb->fsdb_sem);
2522
2523         RETURN(rc);
2524 #endif
2525         return 0;
2526 }
2527
2528 int mgs_write_log_target(struct obd_device *obd,
2529                          struct mgs_target_info *mti)
2530 {
2531         struct fs_db *fsdb;
2532         int rc = -EINVAL;
2533         char *buf, *params;
2534         ENTRY;
2535
2536         /* set/check the new target index */
2537         rc = mgs_set_index(obd, mti);
2538         if (rc < 0) {
2539                 CERROR("Can't get index (%d)\n", rc);
2540                 RETURN(rc);
2541         }
2542
2543         /* COMPAT_146 */
2544         if (mti->mti_flags & LDD_F_UPGRADE14) {
2545                 if (rc == EALREADY) {
2546                         LCONSOLE_INFO("Found index %d for %s 1.4 log, "
2547                                       "upgrading\n", mti->mti_stripe_index,
2548                                       mti->mti_svname);
2549                 } else {
2550                         LCONSOLE_ERROR_MSG(0x149, "Failed to find %s in the old"
2551                                            " client log. Apparently it is not "
2552                                            "part of this filesystem, or the old"
2553                                            " log is wrong.\nUse 'writeconf' on "
2554                                            "the MDT to force log regeneration."
2555                                            "\n", mti->mti_svname);
2556                         /* Not in client log?  Upgrade anyhow...*/
2557                         /* Argument against upgrading: reformat MDT,
2558                            upgrade OST, then OST will start but will be SKIPped
2559                            in client logs.  Maybe error now is better. */
2560                         /* RETURN(-EINVAL); */
2561                 }
2562                 /* end COMPAT_146 */
2563         } else {
2564                 if (rc == EALREADY) {
2565                         LCONSOLE_WARN("Found index %d for %s, updating log\n",
2566                                       mti->mti_stripe_index, mti->mti_svname);
2567                         /* We would like to mark old log sections as invalid
2568                            and add new log sections in the client and mdt logs.
2569                            But if we add new sections, then live clients will
2570                            get repeat setup instructions for already running
2571                            osc's. So don't update the client/mdt logs. */
2572                         mti->mti_flags &= ~LDD_F_UPDATE;
2573                 }
2574         }
2575
2576         rc = mgs_find_or_make_fsdb(obd, mti->mti_fsname, &fsdb);
2577         if (rc) {
2578                 CERROR("Can't get db for %s\n", mti->mti_fsname);
2579                 RETURN(rc);
2580         }
2581
2582         down(&fsdb->fsdb_sem);
2583
2584         if (mti->mti_flags &
2585             (LDD_F_VIRGIN | LDD_F_UPGRADE14 | LDD_F_WRITECONF)) {
2586                 /* Generate a log from scratch */
2587                 if (mti->mti_flags & LDD_F_SV_TYPE_MDT) {
2588                         rc = mgs_write_log_mdt(obd, fsdb, mti);
2589                 } else if (mti->mti_flags & LDD_F_SV_TYPE_OST) {
2590                         rc = mgs_write_log_ost(obd, fsdb, mti);
2591                 } else {
2592                         CERROR("Unknown target type %#x, can't create log for "
2593                                "%s\n", mti->mti_flags, mti->mti_svname);
2594                 }
2595                 if (rc) {
2596                         CERROR("Can't write logs for %s (%d)\n",
2597                                mti->mti_svname, rc);
2598                         GOTO(out_up, rc);
2599                 }
2600         } else {
2601                 /* Just update the params from tunefs in mgs_write_log_params */
2602                 CDEBUG(D_MGS, "Update params for %s\n", mti->mti_svname);
2603                 mti->mti_flags |= LDD_F_PARAM;
2604         }
2605
2606         /* allocate temporary buffer, where class_get_next_param will
2607            make copy of a current  parameter */
2608         OBD_ALLOC(buf, strlen(mti->mti_params) + 1);
2609         if (buf == NULL)
2610                 GOTO(out_up, rc = -ENOMEM);
2611         params = mti->mti_params;
2612         while (params != NULL) {
2613                 rc = class_get_next_param(&params, buf);
2614                 if (rc) {
2615                         if (rc == 1)
2616                                 /* there is no next parameter, that is
2617                                    not an error */
2618                                 rc = 0;
2619                         break;
2620                 }
2621                 CDEBUG(D_MGS, "remaining string: '%s', param: '%s'\n",
2622                        params, buf);
2623                 rc = mgs_write_log_param(obd, fsdb, mti, buf);
2624                 if (rc)
2625                         break;
2626         }
2627
2628         OBD_FREE(buf, strlen(mti->mti_params) + 1);
2629
2630 out_up:
2631         up(&fsdb->fsdb_sem);
2632         RETURN(rc);
2633 }
2634
2635 /* COMPAT_146 */
2636 /* verify that we can handle the old config logs */
2637 int mgs_upgrade_sv_14(struct obd_device *obd, struct mgs_target_info *mti)
2638 {
2639         struct fs_db *fsdb;
2640         int rc = 0;
2641         ENTRY;
2642
2643         /* Create ost log normally, as servers register.  Servers
2644            register with their old uuids (from last_rcvd), so old
2645            (MDT and client) logs should work.
2646          - new MDT won't know about old OSTs, only the ones that have
2647            registered, so we need the old MDT log to get the LOV right
2648            in order for old clients to work.
2649          - Old clients connect to the MDT, not the MGS, for their logs, and
2650            will therefore receive the old client log from the MDT /LOGS dir.
2651          - Old clients can continue to use and connect to old or new OSTs
2652          - New clients will contact the MGS for their log
2653         */
2654
2655         LCONSOLE_INFO("upgrading server %s from pre-1.6\n", mti->mti_svname);
2656         server_mti_print("upgrade", mti);
2657
2658         rc = mgs_find_or_make_fsdb(obd, mti->mti_fsname, &fsdb);
2659         if (rc)
2660                 RETURN(rc);
2661
2662         if (fsdb->fsdb_flags & FSDB_LOG_EMPTY) {
2663                 LCONSOLE_ERROR_MSG(0x14a, "The old client log %s-client is "
2664                                    "missing.  Was tunefs.lustre successful?\n",
2665                                    mti->mti_fsname);
2666                 RETURN(-ENOENT);
2667         }
2668
2669         if (fsdb->fsdb_gen == 0) {
2670                 /* There were no markers in the client log, meaning we have
2671                    not updated the logs for this fs */
2672                 CDEBUG(D_MGS, "found old, unupdated client log\n");
2673         }
2674
2675         if (mti->mti_flags & LDD_F_SV_TYPE_MDT) {
2676                 if (mgs_log_is_empty(obd, mti->mti_svname)) {
2677                         LCONSOLE_ERROR_MSG(0x14b, "The old MDT log %s is "
2678                                            "missing. Was tunefs.lustre "
2679                                            "successful?\n",
2680                                            mti->mti_svname);
2681                         RETURN(-ENOENT);
2682                 }
2683                 /* We're starting with an old uuid.  Assume old name for lov
2684                    as well since the lov entry already exists in the log. */
2685                 CDEBUG(D_MGS, "old mds uuid %s\n", mti->mti_uuid);
2686                 if (strncmp(mti->mti_uuid, fsdb->fsdb_mdtlov + 4,
2687                             strlen(fsdb->fsdb_mdtlov) - 4) != 0) {
2688                         CERROR("old mds uuid %s doesn't match log %s (%s)\n",
2689                                mti->mti_uuid, fsdb->fsdb_mdtlov,
2690                                fsdb->fsdb_mdtlov + 4);
2691                         RETURN(-EINVAL);
2692                 }
2693         }
2694
2695         if (!(fsdb->fsdb_flags & FSDB_OLDLOG14)) {
2696                 LCONSOLE_ERROR_MSG(0x14c, "%s-client is supposedly an old "
2697                                    "log, but no old LOV or MDT was found. "
2698                                    "Consider updating the configuration with"
2699                                    " --writeconf.\n", mti->mti_fsname);
2700         }
2701
2702         RETURN(rc);
2703 }
2704 /* end COMPAT_146 */
2705
2706 int mgs_erase_log(struct obd_device *obd, char *name)
2707 {
2708         struct lvfs_run_ctxt saved;
2709         struct llog_ctxt *ctxt;
2710         struct llog_handle *llh;
2711         int rc = 0;
2712
2713         ctxt = llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
2714         LASSERT(ctxt != NULL);
2715
2716         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
2717         rc = llog_create(ctxt, &llh, NULL, name);
2718         if (rc == 0) {
2719                 llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
2720                 rc = llog_destroy(llh);
2721                 llog_free_handle(llh);
2722         }
2723         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
2724         llog_ctxt_put(ctxt);
2725
2726         if (rc)
2727                 CERROR("failed to clear log %s: %d\n", name, rc);
2728
2729         return(rc);
2730 }
2731
2732 /* erase all logs for the given fs */
2733 int mgs_erase_logs(struct obd_device *obd, char *fsname)
2734 {
2735         struct mgs_obd *mgs = &obd->u.mgs;
2736         static struct fs_db *fsdb;
2737         struct list_head dentry_list;
2738         struct l_linux_dirent *dirent, *n;
2739         int rc, len = strlen(fsname);
2740         ENTRY;
2741
2742         /* Find all the logs in the CONFIGS directory */
2743         rc = class_dentry_readdir(obd, mgs->mgs_configs_dir,
2744                                   mgs->mgs_vfsmnt, &dentry_list);
2745         if (rc) {
2746                 CERROR("Can't read %s dir\n", MOUNT_CONFIGS_DIR);
2747                 RETURN(rc);
2748         }
2749
2750         down(&mgs->mgs_sem);
2751
2752         /* Delete the fs db */
2753         fsdb = mgs_find_fsdb(obd, fsname);
2754         if (fsdb)
2755                 mgs_free_fsdb(obd, fsdb);
2756
2757         list_for_each_entry_safe(dirent, n, &dentry_list, lld_list) {
2758                 list_del(&dirent->lld_list);
2759                 if (strncmp(fsname, dirent->lld_name, len) == 0) {
2760                         CDEBUG(D_MGS, "Removing log %s\n", dirent->lld_name);
2761                         mgs_erase_log(obd, dirent->lld_name);
2762                 }
2763                 OBD_FREE(dirent, sizeof(*dirent));
2764         }
2765
2766         up(&mgs->mgs_sem);
2767
2768         RETURN(rc);
2769 }
2770
2771 /* from llog_swab */
2772 static void print_lustre_cfg(struct lustre_cfg *lcfg)
2773 {
2774         int i;
2775         ENTRY;
2776
2777         CDEBUG(D_MGS, "lustre_cfg: %p\n", lcfg);
2778         CDEBUG(D_MGS, "\tlcfg->lcfg_version: %#x\n", lcfg->lcfg_version);
2779
2780         CDEBUG(D_MGS, "\tlcfg->lcfg_command: %#x\n", lcfg->lcfg_command);
2781         CDEBUG(D_MGS, "\tlcfg->lcfg_num: %#x\n", lcfg->lcfg_num);
2782         CDEBUG(D_MGS, "\tlcfg->lcfg_flags: %#x\n", lcfg->lcfg_flags);
2783         CDEBUG(D_MGS, "\tlcfg->lcfg_nid: %s\n", libcfs_nid2str(lcfg->lcfg_nid));
2784
2785         CDEBUG(D_MGS, "\tlcfg->lcfg_bufcount: %d\n", lcfg->lcfg_bufcount);
2786         if (lcfg->lcfg_bufcount < LUSTRE_CFG_MAX_BUFCOUNT)
2787                 for (i = 0; i < lcfg->lcfg_bufcount; i++) {
2788                         CDEBUG(D_MGS, "\tlcfg->lcfg_buflens[%d]: %d %s\n",
2789                                i, lcfg->lcfg_buflens[i],
2790                                lustre_cfg_string(lcfg, i));
2791                 }
2792         EXIT;
2793 }
2794
2795 /* Set a permanent (config log) param for a target or fs */
2796 int mgs_setparam(struct obd_device *obd, struct lustre_cfg *lcfg, char *fsname)
2797 {
2798         struct fs_db *fsdb;
2799         struct mgs_target_info *mti;
2800         char *devname, *param;
2801         char *ptr, *tmp;
2802         __u32 index;
2803         int rc = 0;
2804         ENTRY;
2805
2806         print_lustre_cfg(lcfg);
2807
2808         /* lustre, lustre-mdtlov, lustre-client, lustre-MDT0000 */
2809         devname = lustre_cfg_string(lcfg, 0);
2810         param = lustre_cfg_string(lcfg, 1);
2811         if (!devname) {
2812                 /* Assume device name embedded in param:
2813                    lustre-OST0000.osc.max_dirty_mb=32 */
2814                 ptr = strchr(param, '.');
2815                 if (ptr) {
2816                         devname = param;
2817                         *ptr = 0;
2818                         param = ptr + 1;
2819                 }
2820         }
2821         if (!devname) {
2822                 LCONSOLE_ERROR_MSG(0x14d, "No target specified: %s\n", param);
2823                 RETURN(-ENOSYS);
2824         }
2825
2826         /* Extract fsname */
2827         ptr = strrchr(devname, '-');
2828         memset(fsname, 0, MTI_NAME_MAXLEN);
2829         if (ptr && (server_name2index(ptr, &index, NULL) >= 0)) {
2830                 /* param related to llite isn't allowed to set by OST or MDT */
2831                 if (strncmp(param, PARAM_LLITE, sizeof(PARAM_LLITE)) == 0)
2832                         RETURN(-EINVAL);
2833
2834                 strncpy(fsname, devname, ptr - devname);
2835         } else {
2836                 /* assume devname is the fsname */
2837                 strncpy(fsname, devname, MTI_NAME_MAXLEN);
2838         }
2839         fsname[MTI_NAME_MAXLEN - 1] = 0;
2840         CDEBUG(D_MGS, "setparam on fs %s device %s\n", fsname, devname);
2841
2842         rc = mgs_find_or_make_fsdb(obd, fsname, &fsdb);
2843         if (rc)
2844                 RETURN(rc);
2845         if (!fsdb->fsdb_fl_mgsself && fsdb->fsdb_flags & FSDB_LOG_EMPTY) {
2846                 CERROR("No filesystem targets for %s.  cfg_device from lctl "
2847                        "is '%s'\n", fsname, devname);
2848                 mgs_free_fsdb(obd, fsdb);
2849                 RETURN(-EINVAL);
2850         }
2851
2852         /* Create a fake mti to hold everything */
2853         OBD_ALLOC_PTR(mti);
2854         if (!mti)
2855                 GOTO(out, rc = -ENOMEM);
2856         strncpy(mti->mti_fsname, fsname, MTI_NAME_MAXLEN);
2857         strncpy(mti->mti_svname, devname, MTI_NAME_MAXLEN);
2858         strncpy(mti->mti_params, param, sizeof(mti->mti_params));
2859         rc = server_name2index(mti->mti_svname, &mti->mti_stripe_index, &tmp);
2860         if (rc < 0)
2861                 /* Not a valid server; may be only fsname */
2862                 rc = 0;
2863         else
2864                 /* Strip -osc or -mdc suffix from svname */
2865                 if (server_make_name(rc, mti->mti_stripe_index, mti->mti_fsname,
2866                                      mti->mti_svname))
2867                         GOTO(out, rc = -EINVAL);
2868
2869         mti->mti_flags = rc | LDD_F_PARAM;
2870
2871         down(&fsdb->fsdb_sem);
2872         /* this is lctl conf_param's single param path, there is not
2873            need to loop through parameters */
2874         rc = mgs_write_log_param(obd, fsdb, mti, mti->mti_params);
2875         up(&fsdb->fsdb_sem);
2876
2877 out:
2878         OBD_FREE_PTR(mti);
2879         RETURN(rc);
2880 }
2881
2882 static int mgs_write_log_pool(struct obd_device *obd, char *logname,
2883                               struct fs_db *fsdb, char *lovname,
2884                               enum lcfg_command_type cmd,
2885                               char *poolname, char *fsname,
2886                               char *ostname, char *comment)
2887 {
2888         struct llog_handle *llh = NULL;
2889         int rc;
2890
2891         rc = record_start_log(obd, &llh, logname);
2892         if (rc)
2893                 return rc;
2894         rc = record_marker(obd, llh, fsdb, CM_START, lovname, comment);
2895         record_base(obd, llh, lovname, 0, cmd, poolname, fsname, ostname, 0);
2896         rc = record_marker(obd, llh, fsdb, CM_END, lovname, comment);
2897         rc = record_end_log(obd, &llh);
2898
2899         return rc;
2900 }
2901
2902 int mgs_pool_cmd(struct obd_device *obd, enum lcfg_command_type cmd,
2903                  char *fsname, char *poolname, char *ostname)
2904 {
2905         struct fs_db *fsdb;
2906         char mdt_index[16];
2907         char *lovname;
2908         char *logname;
2909         char *label = NULL, *canceled_label = NULL;
2910         int label_sz;
2911         struct mgs_target_info *mti = NULL;
2912         int rc, i;
2913         ENTRY;
2914
2915         rc = mgs_find_or_make_fsdb(obd, fsname, &fsdb);
2916         if (rc) {
2917                 CERROR("Can't get db for %s\n", fsname);
2918                 RETURN(rc);
2919         }
2920         if (fsdb->fsdb_flags & FSDB_LOG_EMPTY) {
2921                 CERROR("%s is not defined\n", fsname);
2922                 mgs_free_fsdb(obd, fsdb);
2923                 RETURN(-EINVAL);
2924         }
2925
2926         label_sz = 10 + strlen(fsname) + strlen(poolname);
2927
2928         /* check if ostname match fsname */
2929         if (ostname != NULL) {
2930                 char *ptr;
2931
2932                 ptr = strrchr(ostname, '-');
2933                 if ((ptr == NULL) ||
2934                     (strncmp(fsname, ostname, ptr-ostname) != 0))
2935                         RETURN(-EINVAL);
2936                 label_sz += strlen(ostname);
2937         }
2938
2939         OBD_ALLOC(label, label_sz);
2940         if (label == NULL)
2941                 GOTO(out, rc = -ENOMEM);
2942
2943         switch(cmd) {
2944         case LCFG_POOL_NEW: {
2945                 sprintf(label,
2946                         "new %s.%s", fsname, poolname);
2947                 break;
2948         }
2949         case LCFG_POOL_ADD: {
2950                 sprintf(label,
2951                         "add %s.%s.%s", fsname, poolname, ostname);
2952                 break;
2953         }
2954         case LCFG_POOL_REM: {
2955                 OBD_ALLOC(canceled_label, label_sz);
2956                 if (canceled_label == NULL)
2957                          GOTO(out, rc = -ENOMEM);
2958                 sprintf(label,
2959                         "rem %s.%s.%s", fsname, poolname, ostname);
2960                 sprintf(canceled_label,
2961                         "add %s.%s.%s", fsname, poolname, ostname);
2962                 break;
2963         }
2964         case LCFG_POOL_DEL: {
2965                 OBD_ALLOC(canceled_label, label_sz);
2966                 if (canceled_label == NULL)
2967                          GOTO(out, rc = -ENOMEM);
2968                 sprintf(label,
2969                         "del %s.%s", fsname, poolname);
2970                 sprintf(canceled_label,
2971                         "new %s.%s", fsname, poolname);
2972                 break;
2973         }
2974         default: {
2975                 break;
2976         }
2977         }
2978
2979         down(&fsdb->fsdb_sem);
2980
2981         if (canceled_label != NULL) {
2982                 OBD_ALLOC_PTR(mti);
2983                 if (mti == NULL)
2984                         GOTO(out, rc = -ENOMEM);
2985         }
2986
2987         /* loop on all potential MDT */
2988         for (i = 0; i < INDEX_MAP_SIZE * 8; i++) {
2989                  if (test_bit(i,  fsdb->fsdb_mdt_index_map)) {
2990                         sprintf(mdt_index, "-MDT%04x", i);
2991                         name_create(&logname, fsname, mdt_index);
2992                         name_create(&lovname, logname, "-mdtlov");
2993
2994                         if (canceled_label != NULL) {
2995                                 strcpy(mti->mti_svname, "lov pool");
2996                                 mgs_modify(obd, fsdb, mti, logname, lovname,
2997                                            canceled_label, CM_SKIP);
2998                         }
2999
3000                         mgs_write_log_pool(obd, logname, fsdb, lovname,
3001                                            cmd, fsname, poolname, ostname,
3002                                            label);
3003                         name_destroy(&logname);
3004                         name_destroy(&lovname);
3005                 }
3006         }
3007
3008         name_create(&logname, fsname, "-client");
3009         if (canceled_label != NULL)
3010                 mgs_modify(obd, fsdb, mti, logname, fsdb->fsdb_clilov,
3011                            canceled_label, CM_SKIP);
3012
3013         mgs_write_log_pool(obd, logname, fsdb, fsdb->fsdb_clilov,
3014                            cmd, fsname, poolname, ostname, label);
3015         name_destroy(&logname);
3016
3017         up(&fsdb->fsdb_sem);
3018
3019         EXIT;
3020 out:
3021         if (label != NULL)
3022                 OBD_FREE(label, label_sz);
3023
3024         if (canceled_label != NULL)
3025                 OBD_FREE(canceled_label, label_sz);
3026
3027         if (mti != NULL)
3028                 OBD_FREE_PTR(mti);
3029
3030         return rc;
3031 }
3032
3033 #if 0
3034 /******************** unused *********************/
3035 static int mgs_backup_llog(struct obd_device *obd, char* fsname)
3036 {
3037         struct file *filp, *bak_filp;
3038         struct lvfs_run_ctxt saved;
3039         char *logname, *buf;
3040         loff_t soff = 0 , doff = 0;
3041         int count = 4096, len;
3042         int rc = 0;
3043
3044         OBD_ALLOC(logname, PATH_MAX);
3045         if (logname == NULL)
3046                 return -ENOMEM;
3047
3048         OBD_ALLOC(buf, count);
3049         if (!buf)
3050                 GOTO(out , rc = -ENOMEM);
3051
3052         len = snprintf(logname, PATH_MAX, "%s/%s.bak",
3053                        MOUNT_CONFIGS_DIR, fsname);
3054
3055         if (len >= PATH_MAX - 1) {
3056                 GOTO(out, -ENAMETOOLONG);
3057         }
3058
3059         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
3060
3061         bak_filp = l_filp_open(logname, O_RDWR|O_CREAT|O_TRUNC, 0660);
3062         if (IS_ERR(bak_filp)) {
3063                 rc = PTR_ERR(bak_filp);
3064                 CERROR("backup logfile open %s: %d\n", logname, rc);
3065                 GOTO(pop, rc);
3066         }
3067         sprintf(logname, "%s/%s", MOUNT_CONFIGS_DIR, fsname);
3068         filp = l_filp_open(logname, O_RDONLY, 0);
3069         if (IS_ERR(filp)) {
3070                 rc = PTR_ERR(filp);
3071                 CERROR("logfile open %s: %d\n", logname, rc);
3072                 GOTO(close1f, rc);
3073         }
3074
3075         while ((rc = lustre_fread(filp, buf, count, &soff)) > 0) {
3076                 rc = lustre_fwrite(bak_filp, buf, count, &doff);
3077                 break;
3078         }
3079
3080         filp_close(filp, 0);
3081 close1f:
3082         filp_close(bak_filp, 0);
3083 pop:
3084         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
3085 out:
3086         if (buf)
3087                 OBD_FREE(buf, count);
3088         OBD_FREE(logname, PATH_MAX);
3089         return rc;
3090 }
3091
3092 #endif