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 /* write global obd timeout or ldlm timeout param into log */
1859 static int mgs_write_log_timeout(struct obd_device *obd, struct fs_db *fsdb,
1860                                  struct mgs_target_info *mti, char *value,
1861                                  int cmd, char *comment)
1862 {
1863         struct lustre_cfg_bufs bufs;
1864         struct lustre_cfg *lcfg;
1865         int timeout;
1866         int rc;
1867
1868         timeout = simple_strtoul(value, NULL, 0);
1869         CDEBUG(D_MGS, "timeout: %d (%s)\n", timeout, comment);
1870
1871         lustre_cfg_bufs_reset(&bufs, NULL);
1872         lcfg = lustre_cfg_new(cmd, &bufs);
1873         lcfg->lcfg_num = timeout;
1874         /* modify all servers and clients */
1875         rc = mgs_write_log_direct_all(obd, fsdb, mti, lcfg, mti->mti_fsname,
1876                                       comment);
1877         lustre_cfg_free(lcfg);
1878         return rc;
1879 }
1880
1881 static int mgs_srpc_set_param_disk(struct obd_device *obd,
1882                                    struct fs_db *fsdb,
1883                                    struct mgs_target_info *mti,
1884                                    char *param)
1885 {
1886         struct llog_handle     *llh = NULL;
1887         char                   *logname;
1888         char                   *comment, *ptr;
1889         struct lustre_cfg_bufs  bufs;
1890         struct lustre_cfg      *lcfg;
1891         int                     rc, len;
1892         ENTRY;
1893
1894         /* get comment */
1895         ptr = strchr(param, '=');
1896         LASSERT(ptr);
1897         len = ptr - param;
1898
1899         OBD_ALLOC(comment, len + 1);
1900         if (comment == NULL)
1901                 RETURN(-ENOMEM);
1902         strncpy(comment, param, len);
1903         comment[len] = '\0';
1904
1905         /* prepare lcfg */
1906         lustre_cfg_bufs_reset(&bufs, mti->mti_svname);
1907         lustre_cfg_bufs_set_string(&bufs, 1, param);
1908         lcfg = lustre_cfg_new(LCFG_SPTLRPC_CONF, &bufs);
1909         if (lcfg == NULL)
1910                 GOTO(out_comment, rc = -ENOMEM);
1911
1912         /* construct log name */
1913         rc = name_create(&logname, mti->mti_fsname, "-sptlrpc");
1914         if (rc)
1915                 GOTO(out_lcfg, rc);
1916
1917         if (mgs_log_is_empty(obd, logname)) {
1918                 rc = record_start_log(obd, &llh, logname);
1919                 record_end_log(obd, &llh);
1920                 if (rc)
1921                         GOTO(out, rc);
1922         }
1923
1924         /* obsolete old one */
1925         mgs_modify(obd, fsdb, mti, logname, mti->mti_svname, comment, CM_SKIP);
1926
1927         /* write the new one */
1928         rc = mgs_write_log_direct(obd, fsdb, logname, lcfg,
1929                                   mti->mti_svname, comment);
1930         if (rc)
1931                 CERROR("err %d writing log %s\n", rc, logname);
1932
1933 out:
1934         name_destroy(&logname);
1935 out_lcfg:
1936         lustre_cfg_free(lcfg);
1937 out_comment:
1938         OBD_FREE(comment, len + 1);
1939         RETURN(rc);
1940 }
1941
1942 static int mgs_srpc_set_param_udesc_mem(struct fs_db *fsdb,
1943                                         char *param)
1944 {
1945         char    *ptr;
1946
1947         /* disable the adjustable udesc parameter for now, i.e. use default
1948          * setting that client always ship udesc to MDT if possible. to enable
1949          * it simply remove the following line */
1950         goto error_out;
1951
1952         ptr = strchr(param, '=');
1953         if (ptr == NULL)
1954                 goto error_out;
1955         *ptr++ = '\0';
1956
1957         if (strcmp(param, PARAM_SRPC_UDESC))
1958                 goto error_out;
1959
1960         if (strcmp(ptr, "yes") == 0) {
1961                 fsdb->fsdb_fl_udesc = 1;
1962                 CWARN("Enable user descriptor shipping from client to MDT\n");
1963         } else if (strcmp(ptr, "no") == 0) {
1964                 fsdb->fsdb_fl_udesc = 0;
1965                 CWARN("Disable user descriptor shipping from client to MDT\n");
1966         } else {
1967                 *(ptr - 1) = '=';
1968                 goto error_out;
1969         }
1970         return 0;
1971
1972 error_out:
1973         CERROR("Invalid param: %s\n", param);
1974         return -EINVAL;
1975 }
1976
1977 static int mgs_srpc_set_param_mem(struct fs_db *fsdb,
1978                                   const char *svname,
1979                                   char *param)
1980 {
1981         struct sptlrpc_rule      rule;
1982         struct sptlrpc_rule_set *rset;
1983         int                      rc;
1984         ENTRY;
1985
1986         if (strncmp(param, PARAM_SRPC, sizeof(PARAM_SRPC) - 1) != 0) {
1987                 CERROR("Invalid sptlrpc parameter: %s\n", param);
1988                 RETURN(-EINVAL);
1989         }
1990
1991         if (strncmp(param, PARAM_SRPC_UDESC,
1992                     sizeof(PARAM_SRPC_UDESC) - 1) == 0) {
1993                 RETURN(mgs_srpc_set_param_udesc_mem(fsdb, param));
1994         }
1995
1996         if (strncmp(param, PARAM_SRPC_FLVR, sizeof(PARAM_SRPC_FLVR) - 1) != 0) {
1997                 CERROR("Invalid sptlrpc flavor parameter: %s\n", param);
1998                 RETURN(-EINVAL);
1999         }
2000
2001         param += sizeof(PARAM_SRPC_FLVR) - 1;
2002
2003         rc = sptlrpc_parse_rule(param, &rule);
2004         if (rc)
2005                 RETURN(rc);
2006
2007         /* mgs rules implies must be mgc->mgs */
2008         if (fsdb->fsdb_fl_mgsself) {
2009                 if ((rule.sr_from != LUSTRE_SP_MGC &&
2010                      rule.sr_from != LUSTRE_SP_ANY) ||
2011                     (rule.sr_to != LUSTRE_SP_MGS &&
2012                      rule.sr_to != LUSTRE_SP_ANY))
2013                         RETURN(-EINVAL);
2014         }
2015
2016         /* preapre room for this coming rule. svcname format should be:
2017          * - fsname: general rule
2018          * - fsname-tgtname: target-specific rule
2019          */
2020         if (strchr(svname, '-')) {
2021                 struct mgs_tgt_srpc_conf *tgtconf;
2022                 int                       found = 0;
2023
2024                 for (tgtconf = fsdb->fsdb_srpc_tgt; tgtconf != NULL;
2025                      tgtconf = tgtconf->mtsc_next) {
2026                         if (!strcmp(tgtconf->mtsc_tgt, svname)) {
2027                                 found = 1;
2028                                 break;
2029                         }
2030                 }
2031
2032                 if (!found) {
2033                         int name_len;
2034
2035                         OBD_ALLOC_PTR(tgtconf);
2036                         if (tgtconf == NULL)
2037                                 RETURN(-ENOMEM);
2038
2039                         name_len = strlen(svname);
2040
2041                         OBD_ALLOC(tgtconf->mtsc_tgt, name_len + 1);
2042                         if (tgtconf->mtsc_tgt == NULL) {
2043                                 OBD_FREE_PTR(tgtconf);
2044                                 RETURN(-ENOMEM);
2045                         }
2046                         memcpy(tgtconf->mtsc_tgt, svname, name_len);
2047
2048                         tgtconf->mtsc_next = fsdb->fsdb_srpc_tgt;
2049                         fsdb->fsdb_srpc_tgt = tgtconf;
2050                 }
2051
2052                 rset = &tgtconf->mtsc_rset;
2053         } else {
2054                 rset = &fsdb->fsdb_srpc_gen;
2055         }
2056
2057         rc = sptlrpc_rule_set_merge(rset, &rule);
2058
2059         RETURN(rc);
2060 }
2061
2062 static int mgs_srpc_set_param(struct obd_device *obd,
2063                               struct fs_db *fsdb,
2064                               struct mgs_target_info *mti,
2065                               char *param)
2066 {
2067         char                   *copy;
2068         int                     rc, copy_size;
2069         ENTRY;
2070
2071 #ifndef HAVE_GSS
2072         RETURN(-EINVAL);
2073 #endif
2074         /* keep a copy of original param, which could be destroied
2075          * during parsing */
2076         copy_size = strlen(param) + 1;
2077         OBD_ALLOC(copy, copy_size);
2078         if (copy == NULL)
2079                 return -ENOMEM;
2080         memcpy(copy, param, copy_size);
2081
2082         rc = mgs_srpc_set_param_mem(fsdb, mti->mti_svname, param);
2083         if (rc)
2084                 goto out_free;
2085
2086         /* previous steps guaranteed the syntax is correct */
2087         rc = mgs_srpc_set_param_disk(obd, fsdb, mti, copy);
2088         if (rc)
2089                 goto out_free;
2090
2091         if (fsdb->fsdb_fl_mgsself) {
2092                 /*
2093                  * for mgs rules, make them effective immediately.
2094                  */
2095                 LASSERT(fsdb->fsdb_srpc_tgt == NULL);
2096                 sptlrpc_target_update_exp_flavor(obd, &fsdb->fsdb_srpc_gen);
2097         }
2098
2099 out_free:
2100         OBD_FREE(copy, copy_size);
2101         RETURN(rc);
2102 }
2103
2104 struct mgs_srpc_read_data {
2105         struct fs_db   *msrd_fsdb;
2106         int             msrd_skip;
2107 };
2108
2109 static int mgs_srpc_read_handler(struct llog_handle *llh,
2110                                  struct llog_rec_hdr *rec,
2111                                  void *data)
2112 {
2113         struct mgs_srpc_read_data *msrd = (struct mgs_srpc_read_data *) data;
2114         struct cfg_marker         *marker;
2115         struct lustre_cfg         *lcfg = (struct lustre_cfg *)(rec + 1);
2116         char                      *svname, *param;
2117         int                        cfg_len, rc;
2118         ENTRY;
2119
2120         if (rec->lrh_type != OBD_CFG_REC) {
2121                 CERROR("unhandled lrh_type: %#x\n", rec->lrh_type);
2122                 RETURN(-EINVAL);
2123         }
2124
2125         cfg_len = rec->lrh_len - sizeof(struct llog_rec_hdr) -
2126                   sizeof(struct llog_rec_tail);
2127
2128         rc = lustre_cfg_sanity_check(lcfg, cfg_len);
2129         if (rc) {
2130                 CERROR("Insane cfg\n");
2131                 RETURN(rc);
2132         }
2133
2134         if (lcfg->lcfg_command == LCFG_MARKER) {
2135                 marker = lustre_cfg_buf(lcfg, 1);
2136
2137                 if (marker->cm_flags & CM_START &&
2138                     marker->cm_flags & CM_SKIP)
2139                         msrd->msrd_skip = 1;
2140                 if (marker->cm_flags & CM_END)
2141                         msrd->msrd_skip = 0;
2142
2143                 RETURN(0);
2144         }
2145
2146         if (msrd->msrd_skip)
2147                 RETURN(0);
2148
2149         if (lcfg->lcfg_command != LCFG_SPTLRPC_CONF) {
2150                 CERROR("invalid command (%x)\n", lcfg->lcfg_command);
2151                 RETURN(0);
2152         }
2153
2154         svname = lustre_cfg_string(lcfg, 0);
2155         if (svname == NULL) {
2156                 CERROR("svname is empty\n");
2157                 RETURN(0);
2158         }
2159
2160         param = lustre_cfg_string(lcfg, 1);
2161         if (param == NULL) {
2162                 CERROR("param is empty\n");
2163                 RETURN(0);
2164         }
2165
2166         rc = mgs_srpc_set_param_mem(msrd->msrd_fsdb, svname, param);
2167         if (rc)
2168                 CERROR("read sptlrpc record error (%d): %s\n", rc, param);
2169
2170         RETURN(0);
2171 }
2172
2173 int mgs_get_fsdb_srpc_from_llog(struct obd_device *obd,
2174                                 struct fs_db *fsdb)
2175 {
2176         struct llog_handle        *llh = NULL;
2177         struct lvfs_run_ctxt       saved;
2178         struct llog_ctxt          *ctxt;
2179         char                      *logname;
2180         struct mgs_srpc_read_data  msrd;
2181         int                        rc;
2182         ENTRY;
2183
2184         /* construct log name */
2185         rc = name_create(&logname, fsdb->fsdb_name, "-sptlrpc");
2186         if (rc)
2187                 RETURN(rc);
2188
2189         ctxt = llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
2190         LASSERT(ctxt != NULL);
2191
2192         if (mgs_log_is_empty(obd, logname))
2193                 GOTO(out, rc = 0);
2194
2195         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
2196
2197         rc = llog_create(ctxt, &llh, NULL, logname);
2198         if (rc)
2199                 GOTO(out_pop, rc);
2200
2201         rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
2202         if (rc)
2203                 GOTO(out_close, rc);
2204
2205         if (llog_get_size(llh) <= 1)
2206                 GOTO(out_close, rc = 0);
2207
2208         msrd.msrd_fsdb = fsdb;
2209         msrd.msrd_skip = 0;
2210
2211         rc = llog_process(llh, mgs_srpc_read_handler, (void *) &msrd, NULL);
2212
2213 out_close:
2214         llog_close(llh);
2215 out_pop:
2216         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
2217 out:
2218         llog_ctxt_put(ctxt);
2219         name_destroy(&logname);
2220
2221         if (rc)
2222                 CERROR("failed to read sptlrpc config database: %d\n", rc);
2223         RETURN(rc);
2224 }
2225
2226 static int mgs_write_log_param(struct obd_device *obd, struct fs_db *fsdb,
2227                                struct mgs_target_info *mti, char *ptr)
2228 {
2229         struct lustre_cfg_bufs bufs;
2230         char *logname;
2231         char *tmp;
2232         int rc = 0;
2233         ENTRY;
2234
2235         /* For various parameter settings, we have to figure out which logs
2236            care about them (e.g. both mdt and client for lov settings) */
2237         CDEBUG(D_MGS, "next param '%s'\n", ptr);
2238
2239         /* The params are stored in MOUNT_DATA_FILE and modified via
2240            tunefs.lustre, or set using lctl conf_param */
2241
2242         /* Processed in lustre_start_mgc */
2243         if (class_match_param(ptr, PARAM_MGSNODE, NULL) == 0)
2244                 GOTO(end, rc);
2245
2246         /* Processed in mgs_write_log_ost */
2247         if (class_match_param(ptr, PARAM_FAILMODE, NULL) == 0) {
2248                 if (mti->mti_flags & LDD_F_PARAM) {
2249                         LCONSOLE_ERROR_MSG(0x169, "%s can only be "
2250                                            "changed with tunefs.lustre"
2251                                            "and --writeconf\n", ptr);
2252                         rc = -EPERM;
2253                 }
2254                 GOTO(end, rc);
2255         }
2256
2257         if (class_match_param(ptr, PARAM_SRPC, NULL) == 0) {
2258                 rc = mgs_srpc_set_param(obd, fsdb, mti, ptr);
2259                 GOTO(end, rc);
2260         }
2261
2262         if (class_match_param(ptr, PARAM_FAILNODE, NULL) == 0) {
2263                 /* Add a failover nidlist */
2264                 rc = 0;
2265                 /* We already processed failovers params for new
2266                    targets in mgs_write_log_target */
2267                 if (mti->mti_flags & LDD_F_PARAM) {
2268                         CDEBUG(D_MGS, "Adding failnode\n");
2269                         rc = mgs_write_log_add_failnid(obd, fsdb, mti);
2270                 }
2271                 GOTO(end, rc);
2272         }
2273
2274         if (class_match_param(ptr, PARAM_SYS_TIMEOUT, &tmp) == 0) {
2275                 rc = mgs_write_log_timeout(obd, fsdb, mti, tmp,
2276                                            LCFG_SET_TIMEOUT, "obd_timeout");
2277                 GOTO(end, rc);
2278         }
2279
2280         if (class_match_param(ptr, PARAM_SYS_LDLM_TIMEOUT, &tmp) == 0) {
2281                 rc = mgs_write_log_timeout(obd, fsdb, mti, tmp,
2282                                            LCFG_SET_LDLM_TIMEOUT,
2283                                            "ldlm_timeout");
2284                 GOTO(end, rc);
2285         }
2286
2287         if (class_match_param(ptr, PARAM_OSC""PARAM_ACTIVE, &tmp) == 0) {
2288                 /* active=0 means off, anything else means on */
2289                 char mdt_index[16];
2290                 int flag = (*tmp == '0') ? CM_EXCLUDE : 0;
2291                 int i;
2292
2293                 if (!(mti->mti_flags & LDD_F_SV_TYPE_OST)) {
2294                         LCONSOLE_ERROR_MSG(0x144, "%s: Only OSCs can "
2295                                            "be (de)activated.\n",
2296                                            mti->mti_svname);
2297                         GOTO(end, rc = -EINVAL);
2298                 }
2299                 LCONSOLE_WARN("Permanently %sactivating %s\n",
2300                               flag ? "de": "re", mti->mti_svname);
2301                 /* Modify clilov */
2302                 name_create(&logname, mti->mti_fsname, "-client");
2303                 rc = mgs_modify(obd, fsdb, mti, logname,
2304                                 mti->mti_svname, "add osc", flag);
2305                 name_destroy(&logname);
2306                 if (rc)
2307                         goto active_err;
2308                 /* Modify mdtlov */
2309                 /* FIXME add to all MDT logs for CMD */
2310                 for (i = 0; i < INDEX_MAP_SIZE * 8; i++) {
2311                         if (!test_bit(i, fsdb->fsdb_mdt_index_map))
2312                                 continue;
2313                         sprintf(mdt_index,"-MDT%04x", i);
2314                         name_create(&logname, mti->mti_fsname, mdt_index);
2315                         rc = mgs_modify(obd, fsdb, mti, logname,
2316                                         mti->mti_svname, "add osc", flag);
2317                         name_destroy(&logname);
2318                         if (rc)
2319                                 goto active_err;
2320                 }
2321         active_err:
2322                 if (rc) {
2323                         LCONSOLE_ERROR_MSG(0x145, "Couldn't find %s in"
2324                                            "log (%d). No permanent "
2325                                            "changes were made to the "
2326                                            "config log.\n",
2327                                            mti->mti_svname, rc);
2328                         if (fsdb->fsdb_flags & FSDB_OLDLOG14)
2329                                 LCONSOLE_ERROR_MSG(0x146, "This may be"
2330                                                    " because the log"
2331                                                    "is in the old 1.4"
2332                                                    "style. Consider "
2333                                                    " --writeconf to "
2334                                                    "update the logs.\n");
2335                         GOTO(end, rc);
2336                 }
2337                 /* Fall through to osc proc for deactivating live OSC
2338                    on running MDT / clients. */
2339         }
2340         /* Below here, let obd's XXX_process_config methods handle it */
2341
2342         /* All lov. in proc */
2343         if (class_match_param(ptr, PARAM_LOV, NULL) == 0) {
2344                 char mdt_index[16];
2345                 char *mdtlovname;
2346
2347                 CDEBUG(D_MGS, "lov param %s\n", ptr);
2348                 if (!(mti->mti_flags & LDD_F_SV_TYPE_MDT)) {
2349                         LCONSOLE_ERROR_MSG(0x147, "LOV params must be "
2350                                            "set on the MDT, not %s. "
2351                                            "Ignoring.\n",
2352                                            mti->mti_svname);
2353                         GOTO(end, rc = 0);
2354                 }
2355
2356                 /* Modify mdtlov */
2357                 if (mgs_log_is_empty(obd, mti->mti_svname))
2358                         GOTO(end, rc = -ENODEV);
2359
2360                 sprintf(mdt_index,"-MDT%04x", mti->mti_stripe_index);
2361                 name_create(&logname, mti->mti_fsname, mdt_index);
2362                 name_create(&mdtlovname, logname, "-mdtlov");
2363                 rc = mgs_wlp_lcfg(obd, fsdb, mti, mti->mti_svname,
2364                                   &bufs, mdtlovname, ptr);
2365                 name_destroy(&logname);
2366                 name_destroy(&mdtlovname);
2367                 if (rc)
2368                         GOTO(end, rc);
2369
2370                 /* Modify clilov */
2371                 name_create(&logname, mti->mti_fsname, "-client");
2372                 rc = mgs_wlp_lcfg(obd, fsdb, mti, logname, &bufs,
2373                                   fsdb->fsdb_clilov, ptr);
2374                 name_destroy(&logname);
2375                 GOTO(end, rc);
2376         }
2377
2378         /* All osc., mdc., llite. params in proc */
2379         if ((class_match_param(ptr, PARAM_OSC, NULL) == 0) ||
2380             (class_match_param(ptr, PARAM_MDC, NULL) == 0) ||
2381             (class_match_param(ptr, PARAM_LLITE, NULL) == 0)) {
2382                 char *cname;
2383                 if (memcmp(ptr, PARAM_LLITE, strlen(PARAM_LLITE)) == 0) {
2384                         name_create(&cname, mti->mti_fsname, "-client");
2385                         /* Add the client type to match the obdname in
2386                            class_config_llog_handler */
2387                 } else if (mti->mti_flags & LDD_F_SV_TYPE_MDT) {
2388                         /* COMPAT_146 */
2389                         if (fsdb->fsdb_mdc)
2390                                 name_create(&cname, fsdb->fsdb_mdc, "");
2391                         else
2392                                 name_create(&cname, mti->mti_svname,
2393                                             "-mdc");
2394                 } else if (mti->mti_flags & LDD_F_SV_TYPE_OST) {
2395                         /* COMPAT_146 */
2396                         if (fsdb->fsdb_flags & FSDB_OLDLOG14) {
2397                                 LCONSOLE_ERROR_MSG(0x148, "Upgraded "
2398                                                    "client logs for %s"
2399                                                    " cannot be "
2400                                                    "modified. Consider"
2401                                                    " updating the "
2402                                                    "configuration with"
2403                                                    " --writeconf\n",
2404                                                    mti->mti_svname);
2405                                 /* We don't know the names of all the
2406                                    old oscs*/
2407                                 GOTO(end, rc = -EINVAL);
2408                         }
2409                         name_create(&cname, mti->mti_svname, "-osc");
2410                 } else {
2411                         GOTO(end, rc = -EINVAL);
2412                 }
2413
2414                 CDEBUG(D_MGS, "%.3s param %s\n", ptr, ptr + 4);
2415
2416                 /* Modify client */
2417                 name_create(&logname, mti->mti_fsname, "-client");
2418                 rc = mgs_wlp_lcfg(obd, fsdb, mti, logname, &bufs,
2419                                   cname, ptr);
2420
2421                 /* osc params affect the MDT as well */
2422                 if (!rc && (mti->mti_flags & LDD_F_SV_TYPE_OST)) {
2423                         char mdt_index[16];
2424                         int i;
2425
2426                         for (i = 0; i < INDEX_MAP_SIZE * 8; i++){
2427                                 if (!test_bit(i, fsdb->fsdb_mdt_index_map))
2428                                         continue;
2429                                 name_destroy(&cname);
2430                                 sprintf(mdt_index, "-osc-MDT%04x", i);
2431                                 name_create(&cname, mti->mti_svname,
2432                                             mdt_index);
2433                                 name_destroy(&logname);
2434                                 sprintf(mdt_index, "-MDT%04x", i);
2435                                 name_create(&logname, mti->mti_fsname,
2436                                             mdt_index);
2437                                 if (!mgs_log_is_empty(obd, logname))
2438                                         rc = mgs_wlp_lcfg(obd, fsdb,
2439                                                           mti, logname,
2440                                                           &bufs, cname,
2441                                                           ptr);
2442                                 if (rc)
2443                                         break;
2444                         }
2445                 }
2446                 name_destroy(&logname);
2447                 name_destroy(&cname);
2448                 GOTO(end, rc);
2449         }
2450
2451         /* All mdt. params in proc */
2452         if (class_match_param(ptr, PARAM_MDT, NULL) == 0) {
2453                 char mdt_index[16];
2454                 int i;
2455                 __u32 idx;
2456
2457                 CDEBUG(D_MGS, "%.3s param %s\n", ptr, ptr + 4);
2458                 if (strncmp(mti->mti_svname, mti->mti_fsname,
2459                             MTI_NAME_MAXLEN) == 0)
2460                         /* device is unspecified completely? */
2461                         rc = LDD_F_SV_TYPE_MDT | LDD_F_SV_ALL;
2462                 else
2463                         rc = server_name2index(mti->mti_svname, &idx, NULL);
2464                 if (rc < 0)
2465                         goto active_err;
2466                 if ((rc & LDD_F_SV_TYPE_MDT) == 0)
2467                         goto active_err;
2468                 if (rc & LDD_F_SV_ALL) {
2469                         for (i = 0; i < INDEX_MAP_SIZE * 8; i++) {
2470                                 if (!test_bit(i,
2471                                               fsdb->fsdb_mdt_index_map))
2472                                         continue;
2473                                 sprintf(mdt_index,"-MDT%04x", i);
2474                                 name_create(&logname, mti->mti_fsname,
2475                                             mdt_index);
2476                                 rc = mgs_wlp_lcfg(obd, fsdb, mti,
2477                                                   logname, &bufs,
2478                                                   logname, ptr);
2479                                 name_destroy(&logname);
2480                                 if (rc)
2481                                         goto active_err;
2482                         }
2483                 } else {
2484                         rc = mgs_wlp_lcfg(obd, fsdb, mti,
2485                                           mti->mti_svname, &bufs,
2486                                           mti->mti_svname, ptr);
2487                         if (rc)
2488                                 goto active_err;
2489                 }
2490                 GOTO(end, rc);
2491         }
2492
2493         /* All mdd., ost. params in proc */
2494         if ((class_match_param(ptr, PARAM_MDD, NULL) == 0) ||
2495             (class_match_param(ptr, PARAM_OST, NULL) == 0)) {
2496                 CDEBUG(D_MGS, "%.3s param %s\n", ptr, ptr + 4);
2497                 if (mgs_log_is_empty(obd, mti->mti_svname))
2498                         GOTO(end, rc = -ENODEV);
2499
2500                 rc = mgs_wlp_lcfg(obd, fsdb, mti, mti->mti_svname,
2501                                   &bufs, mti->mti_svname, ptr);
2502                 GOTO(end, rc);
2503         }
2504
2505         LCONSOLE_WARN("Ignoring unrecognized param '%s'\n", ptr);
2506
2507 end:
2508         if (rc)
2509                 CERROR("err %d on param '%s'\n", rc, ptr);
2510
2511         RETURN(rc);
2512 }
2513
2514 /* Not implementing automatic failover nid addition at this time. */
2515 int mgs_check_failnid(struct obd_device *obd, struct mgs_target_info *mti)
2516 {
2517 #if 0
2518         struct fs_db *fsdb;
2519         int rc;
2520         ENTRY;
2521
2522         rc = mgs_find_or_make_fsdb(obd, fsname, &fsdb);
2523         if (rc)
2524                 RETURN(rc);
2525
2526         if (mgs_log_is_empty(obd, mti->mti_svname))
2527                 /* should never happen */
2528                 RETURN(-ENOENT);
2529
2530         CDEBUG(D_MGS, "Checking for new failnids for %s\n", mti->mti_svname);
2531
2532         /* FIXME We can just check mti->params to see if we're already in
2533            the failover list.  Modify mti->params for rewriting back at
2534            server_register_target(). */
2535
2536         down(&fsdb->fsdb_sem);
2537         rc = mgs_write_log_add_failnid(obd, fsdb, mti);
2538         up(&fsdb->fsdb_sem);
2539
2540         RETURN(rc);
2541 #endif
2542         return 0;
2543 }
2544
2545 int mgs_write_log_target(struct obd_device *obd,
2546                          struct mgs_target_info *mti)
2547 {
2548         struct fs_db *fsdb;
2549         int rc = -EINVAL;
2550         char *buf, *params;
2551         ENTRY;
2552
2553         /* set/check the new target index */
2554         rc = mgs_set_index(obd, mti);
2555         if (rc < 0) {
2556                 CERROR("Can't get index (%d)\n", rc);
2557                 RETURN(rc);
2558         }
2559
2560         /* COMPAT_146 */
2561         if (mti->mti_flags & LDD_F_UPGRADE14) {
2562                 if (rc == EALREADY) {
2563                         LCONSOLE_INFO("Found index %d for %s 1.4 log, "
2564                                       "upgrading\n", mti->mti_stripe_index,
2565                                       mti->mti_svname);
2566                 } else {
2567                         LCONSOLE_ERROR_MSG(0x149, "Failed to find %s in the old"
2568                                            " client log. Apparently it is not "
2569                                            "part of this filesystem, or the old"
2570                                            " log is wrong.\nUse 'writeconf' on "
2571                                            "the MDT to force log regeneration."
2572                                            "\n", mti->mti_svname);
2573                         /* Not in client log?  Upgrade anyhow...*/
2574                         /* Argument against upgrading: reformat MDT,
2575                            upgrade OST, then OST will start but will be SKIPped
2576                            in client logs.  Maybe error now is better. */
2577                         /* RETURN(-EINVAL); */
2578                 }
2579                 /* end COMPAT_146 */
2580         } else {
2581                 if (rc == EALREADY) {
2582                         LCONSOLE_WARN("Found index %d for %s, updating log\n",
2583                                       mti->mti_stripe_index, mti->mti_svname);
2584                         /* We would like to mark old log sections as invalid
2585                            and add new log sections in the client and mdt logs.
2586                            But if we add new sections, then live clients will
2587                            get repeat setup instructions for already running
2588                            osc's. So don't update the client/mdt logs. */
2589                         mti->mti_flags &= ~LDD_F_UPDATE;
2590                 }
2591         }
2592
2593         rc = mgs_find_or_make_fsdb(obd, mti->mti_fsname, &fsdb);
2594         if (rc) {
2595                 CERROR("Can't get db for %s\n", mti->mti_fsname);
2596                 RETURN(rc);
2597         }
2598
2599         down(&fsdb->fsdb_sem);
2600
2601         if (mti->mti_flags &
2602             (LDD_F_VIRGIN | LDD_F_UPGRADE14 | LDD_F_WRITECONF)) {
2603                 /* Generate a log from scratch */
2604                 if (mti->mti_flags & LDD_F_SV_TYPE_MDT) {
2605                         rc = mgs_write_log_mdt(obd, fsdb, mti);
2606                 } else if (mti->mti_flags & LDD_F_SV_TYPE_OST) {
2607                         rc = mgs_write_log_ost(obd, fsdb, mti);
2608                 } else {
2609                         CERROR("Unknown target type %#x, can't create log for "
2610                                "%s\n", mti->mti_flags, mti->mti_svname);
2611                 }
2612                 if (rc) {
2613                         CERROR("Can't write logs for %s (%d)\n",
2614                                mti->mti_svname, rc);
2615                         GOTO(out_up, rc);
2616                 }
2617         } else {
2618                 /* Just update the params from tunefs in mgs_write_log_params */
2619                 CDEBUG(D_MGS, "Update params for %s\n", mti->mti_svname);
2620                 mti->mti_flags |= LDD_F_PARAM;
2621         }
2622
2623         /* allocate temporary buffer, where class_get_next_param will
2624            make copy of a current  parameter */
2625         OBD_ALLOC(buf, strlen(mti->mti_params) + 1);
2626         if (buf == NULL)
2627                 GOTO(out_up, rc = -ENOMEM);
2628         params = mti->mti_params;
2629         while (params != NULL) {
2630                 rc = class_get_next_param(&params, buf);
2631                 if (rc) {
2632                         if (rc == 1)
2633                                 /* there is no next parameter, that is
2634                                    not an error */
2635                                 rc = 0;
2636                         break;
2637                 }
2638                 CDEBUG(D_MGS, "remaining string: '%s', param: '%s'\n",
2639                        params, buf);
2640                 rc = mgs_write_log_param(obd, fsdb, mti, buf);
2641                 if (rc)
2642                         break;
2643         }
2644
2645         OBD_FREE(buf, strlen(mti->mti_params) + 1);
2646
2647 out_up:
2648         up(&fsdb->fsdb_sem);
2649         RETURN(rc);
2650 }
2651
2652 /* COMPAT_146 */
2653 /* verify that we can handle the old config logs */
2654 int mgs_upgrade_sv_14(struct obd_device *obd, struct mgs_target_info *mti)
2655 {
2656         struct fs_db *fsdb;
2657         int rc = 0;
2658         ENTRY;
2659
2660         /* Create ost log normally, as servers register.  Servers
2661            register with their old uuids (from last_rcvd), so old
2662            (MDT and client) logs should work.
2663          - new MDT won't know about old OSTs, only the ones that have
2664            registered, so we need the old MDT log to get the LOV right
2665            in order for old clients to work.
2666          - Old clients connect to the MDT, not the MGS, for their logs, and
2667            will therefore receive the old client log from the MDT /LOGS dir.
2668          - Old clients can continue to use and connect to old or new OSTs
2669          - New clients will contact the MGS for their log
2670         */
2671
2672         LCONSOLE_INFO("upgrading server %s from pre-1.6\n", mti->mti_svname);
2673         server_mti_print("upgrade", mti);
2674
2675         rc = mgs_find_or_make_fsdb(obd, mti->mti_fsname, &fsdb);
2676         if (rc)
2677                 RETURN(rc);
2678
2679         if (fsdb->fsdb_flags & FSDB_LOG_EMPTY) {
2680                 LCONSOLE_ERROR_MSG(0x14a, "The old client log %s-client is "
2681                                    "missing.  Was tunefs.lustre successful?\n",
2682                                    mti->mti_fsname);
2683                 RETURN(-ENOENT);
2684         }
2685
2686         if (fsdb->fsdb_gen == 0) {
2687                 /* There were no markers in the client log, meaning we have
2688                    not updated the logs for this fs */
2689                 CDEBUG(D_MGS, "found old, unupdated client log\n");
2690         }
2691
2692         if (mti->mti_flags & LDD_F_SV_TYPE_MDT) {
2693                 if (mgs_log_is_empty(obd, mti->mti_svname)) {
2694                         LCONSOLE_ERROR_MSG(0x14b, "The old MDT log %s is "
2695                                            "missing. Was tunefs.lustre "
2696                                            "successful?\n",
2697                                            mti->mti_svname);
2698                         RETURN(-ENOENT);
2699                 }
2700                 /* We're starting with an old uuid.  Assume old name for lov
2701                    as well since the lov entry already exists in the log. */
2702                 CDEBUG(D_MGS, "old mds uuid %s\n", mti->mti_uuid);
2703                 if (strncmp(mti->mti_uuid, fsdb->fsdb_mdtlov + 4,
2704                             strlen(fsdb->fsdb_mdtlov) - 4) != 0) {
2705                         CERROR("old mds uuid %s doesn't match log %s (%s)\n",
2706                                mti->mti_uuid, fsdb->fsdb_mdtlov,
2707                                fsdb->fsdb_mdtlov + 4);
2708                         RETURN(-EINVAL);
2709                 }
2710         }
2711
2712         if (!(fsdb->fsdb_flags & FSDB_OLDLOG14)) {
2713                 LCONSOLE_ERROR_MSG(0x14c, "%s-client is supposedly an old "
2714                                    "log, but no old LOV or MDT was found. "
2715                                    "Consider updating the configuration with"
2716                                    " --writeconf.\n", mti->mti_fsname);
2717         }
2718
2719         RETURN(rc);
2720 }
2721 /* end COMPAT_146 */
2722
2723 int mgs_erase_log(struct obd_device *obd, char *name)
2724 {
2725         struct lvfs_run_ctxt saved;
2726         struct llog_ctxt *ctxt;
2727         struct llog_handle *llh;
2728         int rc = 0;
2729
2730         ctxt = llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
2731         LASSERT(ctxt != NULL);
2732
2733         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
2734         rc = llog_create(ctxt, &llh, NULL, name);
2735         if (rc == 0) {
2736                 llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
2737                 rc = llog_destroy(llh);
2738                 llog_free_handle(llh);
2739         }
2740         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
2741         llog_ctxt_put(ctxt);
2742
2743         if (rc)
2744                 CERROR("failed to clear log %s: %d\n", name, rc);
2745
2746         return(rc);
2747 }
2748
2749 /* erase all logs for the given fs */
2750 int mgs_erase_logs(struct obd_device *obd, char *fsname)
2751 {
2752         struct mgs_obd *mgs = &obd->u.mgs;
2753         static struct fs_db *fsdb;
2754         struct list_head dentry_list;
2755         struct l_linux_dirent *dirent, *n;
2756         int rc, len = strlen(fsname);
2757         ENTRY;
2758
2759         /* Find all the logs in the CONFIGS directory */
2760         rc = class_dentry_readdir(obd, mgs->mgs_configs_dir,
2761                                   mgs->mgs_vfsmnt, &dentry_list);
2762         if (rc) {
2763                 CERROR("Can't read %s dir\n", MOUNT_CONFIGS_DIR);
2764                 RETURN(rc);
2765         }
2766
2767         down(&mgs->mgs_sem);
2768
2769         /* Delete the fs db */
2770         fsdb = mgs_find_fsdb(obd, fsname);
2771         if (fsdb)
2772                 mgs_free_fsdb(obd, fsdb);
2773
2774         list_for_each_entry_safe(dirent, n, &dentry_list, lld_list) {
2775                 list_del(&dirent->lld_list);
2776                 if (strncmp(fsname, dirent->lld_name, len) == 0) {
2777                         CDEBUG(D_MGS, "Removing log %s\n", dirent->lld_name);
2778                         mgs_erase_log(obd, dirent->lld_name);
2779                 }
2780                 OBD_FREE(dirent, sizeof(*dirent));
2781         }
2782
2783         up(&mgs->mgs_sem);
2784
2785         RETURN(rc);
2786 }
2787
2788 /* from llog_swab */
2789 static void print_lustre_cfg(struct lustre_cfg *lcfg)
2790 {
2791         int i;
2792         ENTRY;
2793
2794         CDEBUG(D_MGS, "lustre_cfg: %p\n", lcfg);
2795         CDEBUG(D_MGS, "\tlcfg->lcfg_version: %#x\n", lcfg->lcfg_version);
2796
2797         CDEBUG(D_MGS, "\tlcfg->lcfg_command: %#x\n", lcfg->lcfg_command);
2798         CDEBUG(D_MGS, "\tlcfg->lcfg_num: %#x\n", lcfg->lcfg_num);
2799         CDEBUG(D_MGS, "\tlcfg->lcfg_flags: %#x\n", lcfg->lcfg_flags);
2800         CDEBUG(D_MGS, "\tlcfg->lcfg_nid: %s\n", libcfs_nid2str(lcfg->lcfg_nid));
2801
2802         CDEBUG(D_MGS, "\tlcfg->lcfg_bufcount: %d\n", lcfg->lcfg_bufcount);
2803         if (lcfg->lcfg_bufcount < LUSTRE_CFG_MAX_BUFCOUNT)
2804                 for (i = 0; i < lcfg->lcfg_bufcount; i++) {
2805                         CDEBUG(D_MGS, "\tlcfg->lcfg_buflens[%d]: %d %s\n",
2806                                i, lcfg->lcfg_buflens[i],
2807                                lustre_cfg_string(lcfg, i));
2808                 }
2809         EXIT;
2810 }
2811
2812 /* Set a permanent (config log) param for a target or fs */
2813 int mgs_setparam(struct obd_device *obd, struct lustre_cfg *lcfg, char *fsname)
2814 {
2815         struct fs_db *fsdb;
2816         struct mgs_target_info *mti;
2817         char *devname, *param;
2818         char *ptr, *tmp;
2819         __u32 index;
2820         int rc = 0;
2821         ENTRY;
2822
2823         print_lustre_cfg(lcfg);
2824
2825         /* lustre, lustre-mdtlov, lustre-client, lustre-MDT0000 */
2826         devname = lustre_cfg_string(lcfg, 0);
2827         param = lustre_cfg_string(lcfg, 1);
2828         if (!devname) {
2829                 /* Assume device name embedded in param:
2830                    lustre-OST0000.osc.max_dirty_mb=32 */
2831                 ptr = strchr(param, '.');
2832                 if (ptr) {
2833                         devname = param;
2834                         *ptr = 0;
2835                         param = ptr + 1;
2836                 }
2837         }
2838         if (!devname) {
2839                 LCONSOLE_ERROR_MSG(0x14d, "No target specified: %s\n", param);
2840                 RETURN(-ENOSYS);
2841         }
2842
2843         /* Extract fsname */
2844         ptr = strrchr(devname, '-');
2845         memset(fsname, 0, MTI_NAME_MAXLEN);
2846         if (ptr && (server_name2index(ptr, &index, NULL) >= 0)) {
2847                 /* param related to llite isn't allowed to set by OST or MDT */
2848                 if (strncmp(param, PARAM_LLITE, sizeof(PARAM_LLITE)) == 0)
2849                         RETURN(-EINVAL);
2850
2851                 strncpy(fsname, devname, ptr - devname);
2852         } else {
2853                 /* assume devname is the fsname */
2854                 strncpy(fsname, devname, MTI_NAME_MAXLEN);
2855         }
2856         fsname[MTI_NAME_MAXLEN - 1] = 0;
2857         CDEBUG(D_MGS, "setparam on fs %s device %s\n", fsname, devname);
2858
2859         rc = mgs_find_or_make_fsdb(obd, fsname, &fsdb);
2860         if (rc)
2861                 RETURN(rc);
2862         if (!fsdb->fsdb_fl_mgsself && fsdb->fsdb_flags & FSDB_LOG_EMPTY) {
2863                 CERROR("No filesystem targets for %s.  cfg_device from lctl "
2864                        "is '%s'\n", fsname, devname);
2865                 mgs_free_fsdb(obd, fsdb);
2866                 RETURN(-EINVAL);
2867         }
2868
2869         /* Create a fake mti to hold everything */
2870         OBD_ALLOC_PTR(mti);
2871         if (!mti)
2872                 GOTO(out, rc = -ENOMEM);
2873         strncpy(mti->mti_fsname, fsname, MTI_NAME_MAXLEN);
2874         strncpy(mti->mti_svname, devname, MTI_NAME_MAXLEN);
2875         strncpy(mti->mti_params, param, sizeof(mti->mti_params));
2876         rc = server_name2index(mti->mti_svname, &mti->mti_stripe_index, &tmp);
2877         if (rc < 0)
2878                 /* Not a valid server; may be only fsname */
2879                 rc = 0;
2880         else
2881                 /* Strip -osc or -mdc suffix from svname */
2882                 if (server_make_name(rc, mti->mti_stripe_index, mti->mti_fsname,
2883                                      mti->mti_svname))
2884                         GOTO(out, rc = -EINVAL);
2885
2886         mti->mti_flags = rc | LDD_F_PARAM;
2887
2888         down(&fsdb->fsdb_sem);
2889         /* this is lctl conf_param's single param path, there is not
2890            need to loop through parameters */
2891         rc = mgs_write_log_param(obd, fsdb, mti, mti->mti_params);
2892         up(&fsdb->fsdb_sem);
2893
2894 out:
2895         OBD_FREE_PTR(mti);
2896         RETURN(rc);
2897 }
2898
2899 static int mgs_write_log_pool(struct obd_device *obd, char *logname,
2900                               struct fs_db *fsdb, char *lovname,
2901                               enum lcfg_command_type cmd,
2902                               char *poolname, char *fsname,
2903                               char *ostname, char *comment)
2904 {
2905         struct llog_handle *llh = NULL;
2906         int rc;
2907
2908         rc = record_start_log(obd, &llh, logname);
2909         if (rc)
2910                 return rc;
2911         rc = record_marker(obd, llh, fsdb, CM_START, lovname, comment);
2912         record_base(obd, llh, lovname, 0, cmd, poolname, fsname, ostname, 0);
2913         rc = record_marker(obd, llh, fsdb, CM_END, lovname, comment);
2914         rc = record_end_log(obd, &llh);
2915
2916         return rc;
2917 }
2918
2919 int mgs_pool_cmd(struct obd_device *obd, enum lcfg_command_type cmd,
2920                  char *fsname, char *poolname, char *ostname)
2921 {
2922         struct fs_db *fsdb;
2923         char mdt_index[16];
2924         char *lovname;
2925         char *logname;
2926         char *label = NULL, *canceled_label = NULL;
2927         int label_sz;
2928         struct mgs_target_info *mti = NULL;
2929         int rc, i;
2930         ENTRY;
2931
2932         rc = mgs_find_or_make_fsdb(obd, fsname, &fsdb);
2933         if (rc) {
2934                 CERROR("Can't get db for %s\n", fsname);
2935                 RETURN(rc);
2936         }
2937         if (fsdb->fsdb_flags & FSDB_LOG_EMPTY) {
2938                 CERROR("%s is not defined\n", fsname);
2939                 mgs_free_fsdb(obd, fsdb);
2940                 RETURN(-EINVAL);
2941         }
2942
2943         label_sz = 10 + strlen(fsname) + strlen(poolname);
2944
2945         /* check if ostname match fsname */
2946         if (ostname != NULL) {
2947                 char *ptr;
2948
2949                 ptr = strrchr(ostname, '-');
2950                 if ((ptr == NULL) ||
2951                     (strncmp(fsname, ostname, ptr-ostname) != 0))
2952                         RETURN(-EINVAL);
2953                 label_sz += strlen(ostname);
2954         }
2955
2956         OBD_ALLOC(label, label_sz);
2957         if (label == NULL)
2958                 GOTO(out, rc = -ENOMEM);
2959
2960         switch(cmd) {
2961         case LCFG_POOL_NEW: {
2962                 sprintf(label,
2963                         "new %s.%s", fsname, poolname);
2964                 break;
2965         }
2966         case LCFG_POOL_ADD: {
2967                 sprintf(label,
2968                         "add %s.%s.%s", fsname, poolname, ostname);
2969                 break;
2970         }
2971         case LCFG_POOL_REM: {
2972                 OBD_ALLOC(canceled_label, label_sz);
2973                 if (canceled_label == NULL)
2974                          GOTO(out, rc = -ENOMEM);
2975                 sprintf(label,
2976                         "rem %s.%s.%s", fsname, poolname, ostname);
2977                 sprintf(canceled_label,
2978                         "add %s.%s.%s", fsname, poolname, ostname);
2979                 break;
2980         }
2981         case LCFG_POOL_DEL: {
2982                 OBD_ALLOC(canceled_label, label_sz);
2983                 if (canceled_label == NULL)
2984                          GOTO(out, rc = -ENOMEM);
2985                 sprintf(label,
2986                         "del %s.%s", fsname, poolname);
2987                 sprintf(canceled_label,
2988                         "new %s.%s", fsname, poolname);
2989                 break;
2990         }
2991         default: {
2992                 break;
2993         }
2994         }
2995
2996         down(&fsdb->fsdb_sem);
2997
2998         if (canceled_label != NULL) {
2999                 OBD_ALLOC_PTR(mti);
3000                 if (mti == NULL)
3001                         GOTO(out, rc = -ENOMEM);
3002         }
3003
3004         /* loop on all potential MDT */
3005         for (i = 0; i < INDEX_MAP_SIZE * 8; i++) {
3006                  if (test_bit(i,  fsdb->fsdb_mdt_index_map)) {
3007                         sprintf(mdt_index, "-MDT%04x", i);
3008                         name_create(&logname, fsname, mdt_index);
3009                         name_create(&lovname, logname, "-mdtlov");
3010
3011                         if (canceled_label != NULL) {
3012                                 strcpy(mti->mti_svname, "lov pool");
3013                                 mgs_modify(obd, fsdb, mti, logname, lovname,
3014                                            canceled_label, CM_SKIP);
3015                         }
3016
3017                         mgs_write_log_pool(obd, logname, fsdb, lovname,
3018                                            cmd, fsname, poolname, ostname,
3019                                            label);
3020                         name_destroy(&logname);
3021                         name_destroy(&lovname);
3022                 }
3023         }
3024
3025         name_create(&logname, fsname, "-client");
3026         if (canceled_label != NULL)
3027                 mgs_modify(obd, fsdb, mti, logname, fsdb->fsdb_clilov,
3028                            canceled_label, CM_SKIP);
3029
3030         mgs_write_log_pool(obd, logname, fsdb, fsdb->fsdb_clilov,
3031                            cmd, fsname, poolname, ostname, label);
3032         name_destroy(&logname);
3033
3034         up(&fsdb->fsdb_sem);
3035
3036         EXIT;
3037 out:
3038         if (label != NULL)
3039                 OBD_FREE(label, label_sz);
3040
3041         if (canceled_label != NULL)
3042                 OBD_FREE(canceled_label, label_sz);
3043
3044         if (mti != NULL)
3045                 OBD_FREE_PTR(mti);
3046
3047         return rc;
3048 }
3049
3050 #if 0
3051 /******************** unused *********************/
3052 static int mgs_backup_llog(struct obd_device *obd, char* fsname)
3053 {
3054         struct file *filp, *bak_filp;
3055         struct lvfs_run_ctxt saved;
3056         char *logname, *buf;
3057         loff_t soff = 0 , doff = 0;
3058         int count = 4096, len;
3059         int rc = 0;
3060
3061         OBD_ALLOC(logname, PATH_MAX);
3062         if (logname == NULL)
3063                 return -ENOMEM;
3064
3065         OBD_ALLOC(buf, count);
3066         if (!buf)
3067                 GOTO(out , rc = -ENOMEM);
3068
3069         len = snprintf(logname, PATH_MAX, "%s/%s.bak",
3070                        MOUNT_CONFIGS_DIR, fsname);
3071
3072         if (len >= PATH_MAX - 1) {
3073                 GOTO(out, -ENAMETOOLONG);
3074         }
3075
3076         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
3077
3078         bak_filp = l_filp_open(logname, O_RDWR|O_CREAT|O_TRUNC, 0660);
3079         if (IS_ERR(bak_filp)) {
3080                 rc = PTR_ERR(bak_filp);
3081                 CERROR("backup logfile open %s: %d\n", logname, rc);
3082                 GOTO(pop, rc);
3083         }
3084         sprintf(logname, "%s/%s", MOUNT_CONFIGS_DIR, fsname);
3085         filp = l_filp_open(logname, O_RDONLY, 0);
3086         if (IS_ERR(filp)) {
3087                 rc = PTR_ERR(filp);
3088                 CERROR("logfile open %s: %d\n", logname, rc);
3089                 GOTO(close1f, rc);
3090         }
3091
3092         while ((rc = lustre_fread(filp, buf, count, &soff)) > 0) {
3093                 rc = lustre_fwrite(bak_filp, buf, count, &doff);
3094                 break;
3095         }
3096
3097         filp_close(filp, 0);
3098 close1f:
3099         filp_close(bak_filp, 0);
3100 pop:
3101         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
3102 out:
3103         if (buf)
3104                 OBD_FREE(buf, count);
3105         OBD_FREE(logname, PATH_MAX);
3106         return rc;
3107 }
3108
3109 #endif