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LU-5396 lod: (and mdt, mgs) make some symbols static
[fs/lustre-release.git] / lustre / mgs / mgs_llog.c
index 6303c4c..85a42a9 100644 (file)
@@ -27,7 +27,7 @@
  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
  *
- * Copyright (c) 2011, 2013, Intel Corporation.
+ * Copyright (c) 2011, 2014, Intel Corporation.
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
@@ -46,7 +46,7 @@
 #define D_MGS D_CONFIG
 
 #include <obd.h>
-#include <obd_lov.h>
+#include <lustre_ioctl.h>
 #include <lustre_param.h>
 #include <lustre_sec.h>
 #include <lustre_quota.h>
@@ -55,8 +55,9 @@
 
 /********************** Class functions ********************/
 
+/* Find all logs in CONFIG directory and link then into list */
 int class_dentry_readdir(const struct lu_env *env,
-                        struct mgs_device *mgs, cfs_list_t *list)
+                        struct mgs_device *mgs, struct list_head *log_list)
 {
        struct dt_object    *dir = mgs->mgs_configs_dir;
        const struct dt_it_ops *iops;
@@ -65,10 +66,7 @@ int class_dentry_readdir(const struct lu_env *env,
        char                *key;
        int                  rc, key_sz;
 
-       CFS_INIT_LIST_HEAD(list);
-
-       if (!dt_try_as_dir(env, dir))
-               GOTO(out, rc = -ENOTDIR);
+       INIT_LIST_HEAD(log_list);
 
        LASSERT(dir);
        LASSERT(dir->do_index_ops);
@@ -108,10 +106,10 @@ int class_dentry_readdir(const struct lu_env *env,
                        break;
                }
 
-               memcpy(de->name, key, key_sz);
-               de->name[key_sz] = 0;
+               memcpy(de->mde_name, key, key_sz);
+               de->mde_name[key_sz] = 0;
 
-               cfs_list_add(&de->list, list);
+               list_add(&de->mde_list, log_list);
 
 next:
                rc = iops->next(env, it);
@@ -122,7 +120,6 @@ next:
 
 fini:
        iops->fini(env, it);
-out:
        if (rc)
                CERROR("%s: key failed when listing %s: rc = %d\n",
                       mgs->mgs_obd->obd_name, MOUNT_CONFIGS_DIR, rc);
@@ -317,10 +314,10 @@ static void mgs_free_fsdb_srpc(struct fs_db *fsdb)
 struct fs_db *mgs_find_fsdb(struct mgs_device *mgs, char *fsname)
 {
         struct fs_db *fsdb;
-        cfs_list_t *tmp;
+       struct list_head *tmp;
 
-        cfs_list_for_each(tmp, &mgs->mgs_fs_db_list) {
-                fsdb = cfs_list_entry(tmp, struct fs_db, fsdb_list);
+       list_for_each(tmp, &mgs->mgs_fs_db_list) {
+               fsdb = list_entry(tmp, struct fs_db, fsdb_list);
                 if (strcmp(fsdb->fsdb_name, fsname) == 0)
                         return fsdb;
         }
@@ -372,7 +369,7 @@ static struct fs_db *mgs_new_fsdb(const struct lu_env *env,
                lproc_mgs_add_live(mgs, fsdb);
         }
 
-        cfs_list_add(&fsdb->fsdb_list, &mgs->mgs_fs_db_list);
+       list_add(&fsdb->fsdb_list, &mgs->mgs_fs_db_list);
 
         RETURN(fsdb);
 err:
@@ -388,10 +385,10 @@ err:
 
 static void mgs_free_fsdb(struct mgs_device *mgs, struct fs_db *fsdb)
 {
-        /* wait for anyone with the sem */
+       /* wait for anyone with the sem */
        mutex_lock(&fsdb->fsdb_mutex);
        lproc_mgs_del_live(mgs, fsdb);
-        cfs_list_del(&fsdb->fsdb_list);
+       list_del(&fsdb->fsdb_list);
 
         /* deinitialize fsr */
        mgs_ir_fini_fs(mgs, fsdb);
@@ -409,21 +406,22 @@ static void mgs_free_fsdb(struct mgs_device *mgs, struct fs_db *fsdb)
 
 int mgs_init_fsdb_list(struct mgs_device *mgs)
 {
-        CFS_INIT_LIST_HEAD(&mgs->mgs_fs_db_list);
+       INIT_LIST_HEAD(&mgs->mgs_fs_db_list);
         return 0;
 }
 
 int mgs_cleanup_fsdb_list(struct mgs_device *mgs)
 {
-        struct fs_db *fsdb;
-        cfs_list_t *tmp, *tmp2;
+       struct fs_db *fsdb;
+       struct list_head *tmp, *tmp2;
+
        mutex_lock(&mgs->mgs_mutex);
-        cfs_list_for_each_safe(tmp, tmp2, &mgs->mgs_fs_db_list) {
-                fsdb = cfs_list_entry(tmp, struct fs_db, fsdb_list);
+       list_for_each_safe(tmp, tmp2, &mgs->mgs_fs_db_list) {
+               fsdb = list_entry(tmp, struct fs_db, fsdb_list);
                mgs_free_fsdb(mgs, fsdb);
-        }
+       }
        mutex_unlock(&mgs->mgs_mutex);
-        return 0;
+       return 0;
 }
 
 int mgs_find_or_make_fsdb(const struct lu_env *env,
@@ -561,13 +559,14 @@ static int mgs_set_index(const struct lu_env *env,
                         fsdb->fsdb_mdt_count ++;
         }
 
-        if (mti->mti_stripe_index >= INDEX_MAP_SIZE * 8) {
-                LCONSOLE_ERROR_MSG(0x13f, "Server %s requested index %d, "
-                                   "but the max index is %d.\n",
-                                   mti->mti_svname, mti->mti_stripe_index,
-                                   INDEX_MAP_SIZE * 8);
+       /* the last index(0xffff) is reserved for default value. */
+       if (mti->mti_stripe_index >= INDEX_MAP_SIZE * 8 - 1) {
+               LCONSOLE_ERROR_MSG(0x13f, "Server %s requested index %u, "
+                                  "but index must be less than %u.\n",
+                                  mti->mti_svname, mti->mti_stripe_index,
+                                  INDEX_MAP_SIZE * 8 - 1);
                GOTO(out_up, rc = -ERANGE);
-        }
+       }
 
        if (test_bit(mti->mti_stripe_index, imap)) {
                 if ((mti->mti_flags & LDD_F_VIRGIN) &&
@@ -644,11 +643,7 @@ static int mgs_modify_handler(const struct lu_env *env,
                 marker->cm_flags &= ~CM_EXCLUDE; /* in case we're unexcluding */
                 marker->cm_flags |= mml->mml_marker.cm_flags;
                 marker->cm_canceltime = mml->mml_marker.cm_canceltime;
-                /* Header and tail are added back to lrh_len in
-                   llog_lvfs_write_rec */
-                rec->lrh_len = cfg_len;
-               rc = llog_write(env, llh, rec, NULL, 0, (void *)lcfg,
-                               rec->lrh_index);
+               rc = llog_write(env, llh, rec, rec->lrh_index);
                 if (!rc)
                          mml->mml_modified++;
         }
@@ -697,8 +692,14 @@ static int mgs_modify(const struct lu_env *env, struct mgs_device *mgs,
         OBD_ALLOC_PTR(mml);
         if (!mml)
                 GOTO(out_close, rc = -ENOMEM);
-        strcpy(mml->mml_marker.cm_comment, comment);
-        strcpy(mml->mml_marker.cm_tgtname, devname);
+       if (strlcpy(mml->mml_marker.cm_comment, comment,
+                   sizeof(mml->mml_marker.cm_comment)) >=
+           sizeof(mml->mml_marker.cm_comment))
+               GOTO(out_free, rc = -E2BIG);
+       if (strlcpy(mml->mml_marker.cm_tgtname, devname,
+                   sizeof(mml->mml_marker.cm_tgtname)) >=
+           sizeof(mml->mml_marker.cm_tgtname))
+               GOTO(out_free, rc = -E2BIG);
         /* Modify mostly means cancel */
         mml->mml_marker.cm_flags = flags;
         mml->mml_marker.cm_canceltime = flags ? cfs_time_current_sec() : 0;
@@ -707,6 +708,8 @@ static int mgs_modify(const struct lu_env *env, struct mgs_device *mgs,
                          NULL);
        if (!rc && !mml->mml_modified)
                rc = 1;
+
+out_free:
         OBD_FREE_PTR(mml);
 
 out_close:
@@ -780,35 +783,12 @@ static int check_markers(struct lustre_cfg *lcfg,
        return 0;
 }
 
-static int record_lcfg(const struct lu_env *env, struct llog_handle *llh,
-                      struct lustre_cfg *lcfg)
-{
-       struct llog_rec_hdr      rec;
-       int                      buflen, rc;
-
-        if (!lcfg || !llh)
-                return -ENOMEM;
-
-        LASSERT(llh->lgh_ctxt);
-
-        buflen = lustre_cfg_len(lcfg->lcfg_bufcount,
-                                lcfg->lcfg_buflens);
-        rec.lrh_len = llog_data_len(buflen);
-        rec.lrh_type = OBD_CFG_REC;
-
-        /* idx = -1 means append */
-       rc = llog_write(env, llh, &rec, NULL, 0, (void *)lcfg, -1);
-        if (rc)
-                CERROR("failed %d\n", rc);
-        return rc;
-}
-
 static int record_base(const struct lu_env *env, struct llog_handle *llh,
                      char *cfgname, lnet_nid_t nid, int cmd,
                      char *s1, char *s2, char *s3, char *s4)
 {
-       struct mgs_thread_info *mgi = mgs_env_info(env);
-       struct lustre_cfg     *lcfg;
+       struct mgs_thread_info  *mgi = mgs_env_info(env);
+       struct llog_cfg_rec     *lcr;
        int rc;
 
        CDEBUG(D_MGS, "lcfg %s %#x %s %s %s %s\n", cfgname,
@@ -824,19 +804,19 @@ static int record_base(const struct lu_env *env, struct llog_handle *llh,
        if (s4)
                lustre_cfg_bufs_set_string(&mgi->mgi_bufs, 4, s4);
 
-       lcfg = lustre_cfg_new(cmd, &mgi->mgi_bufs);
-       if (!lcfg)
+       lcr = lustre_cfg_rec_new(cmd, &mgi->mgi_bufs);
+       if (lcr == NULL)
                return -ENOMEM;
-       lcfg->lcfg_nid = nid;
 
-       rc = record_lcfg(env, llh, lcfg);
+       lcr->lcr_cfg.lcfg_nid = nid;
+       rc = llog_write(env, llh, &lcr->lcr_hdr, LLOG_NEXT_IDX);
 
-       lustre_cfg_free(lcfg);
+       lustre_cfg_rec_free(lcr);
 
-        if (rc) {
-                CERROR("error %d: lcfg %s %#x %s %s %s %s\n", rc, cfgname,
-                       cmd, s1, s2, s3, s4);
-        }
+       if (rc < 0)
+               CDEBUG(D_MGS,
+                      "failed to write lcfg %s %#x %s %s %s %s: rc = %d\n",
+                      cfgname, cmd, s1, s2, s3, s4, rc);
        return rc;
 }
 
@@ -993,7 +973,7 @@ static int mgs_replace_handler(const struct lu_env *env,
                RETURN(0);
 copy_out:
        /* Record is placed in temporary llog as is */
-       rc = llog_write(env, mrul->temp_llh, rec, NULL, 0, NULL, -1);
+       rc = llog_write(env, mrul->temp_llh, rec, LLOG_NEXT_IDX);
 
        CDEBUG(D_MGS, "Copied idx=%d, rc=%d, len=%d, cmd %x %s %s\n",
               rec->lrh_index, rc, rec->lrh_len, lcfg->lcfg_command,
@@ -1089,9 +1069,10 @@ static int mgs_replace_nids_log(const struct lu_env *env,
        if (!mrul)
                GOTO(out_close, rc = -ENOMEM);
        /* devname is only needed information to replace UUID records */
-       strncpy(mrul->target.mti_svname, devname, MTI_NAME_MAXLEN);
+       strlcpy(mrul->target.mti_svname, devname,
+               sizeof(mrul->target.mti_svname));
        /* parse nids later */
-       strncpy(mrul->target.mti_params, nids, MTI_PARAM_MAXLEN);
+       strlcpy(mrul->target.mti_params, nids, sizeof(mrul->target.mti_params));
        /* Copy records to this temporary llog */
        mrul->temp_llh = orig_llh;
 
@@ -1167,13 +1148,36 @@ static int mgs_parse_devname(char *devname, char *fsname, __u32 *index)
        RETURN(0);
 }
 
+/* This is only called during replace_nids */
 static int only_mgs_is_running(struct obd_device *mgs_obd)
 {
        /* TDB: Is global variable with devices count exists? */
        int num_devices = get_devices_count();
+       int num_exports = 0;
+       struct obd_export *exp;
+
+       spin_lock(&mgs_obd->obd_dev_lock);
+       list_for_each_entry(exp, &mgs_obd->obd_exports, exp_obd_chain) {
+               /* skip self export */
+               if (exp == mgs_obd->obd_self_export)
+                       continue;
+               if (exp_connect_flags(exp) & OBD_CONNECT_MDS_MDS)
+                       continue;
+
+               ++num_exports;
+
+               CERROR("%s: node %s still connected during replace_nids "
+                      "connect_flags:%llx\n",
+                      mgs_obd->obd_name,
+                      libcfs_nid2str(exp->exp_nid_stats->nid),
+                      exp_connect_flags(exp));
+
+       }
+       spin_unlock(&mgs_obd->obd_dev_lock);
+
        /* osd, MGS and MGC + self_export
-          (wc -l /proc/fs/lustre/devices <= 2) && (num_exports <= 2) */
-       return (num_devices <= 3) && (mgs_obd->obd_num_exports <= 2);
+          (wc -l /proc/fs/lustre/devices <= 2) && (non self exports == 0) */
+       return (num_devices <= 3) && (num_exports == 0);
 }
 
 static int name_create_mdt(char **logname, char *fsname, int i)
@@ -1264,35 +1268,36 @@ out:
 static int record_lov_setup(const struct lu_env *env, struct llog_handle *llh,
                            char *devname, struct lov_desc *desc)
 {
-       struct mgs_thread_info *mgi = mgs_env_info(env);
-       struct lustre_cfg *lcfg;
+       struct mgs_thread_info  *mgi = mgs_env_info(env);
+       struct llog_cfg_rec     *lcr;
        int rc;
 
        lustre_cfg_bufs_reset(&mgi->mgi_bufs, devname);
        lustre_cfg_bufs_set(&mgi->mgi_bufs, 1, desc, sizeof(*desc));
-       lcfg = lustre_cfg_new(LCFG_SETUP, &mgi->mgi_bufs);
-       if (!lcfg)
+       lcr = lustre_cfg_rec_new(LCFG_SETUP, &mgi->mgi_bufs);
+       if (lcr == NULL)
                return -ENOMEM;
-       rc = record_lcfg(env, llh, lcfg);
 
-       lustre_cfg_free(lcfg);
+       rc = llog_write(env, llh, &lcr->lcr_hdr, LLOG_NEXT_IDX);
+       lustre_cfg_rec_free(lcr);
        return rc;
 }
 
 static int record_lmv_setup(const struct lu_env *env, struct llog_handle *llh,
                             char *devname, struct lmv_desc *desc)
 {
-       struct mgs_thread_info *mgi = mgs_env_info(env);
-       struct lustre_cfg *lcfg;
+       struct mgs_thread_info  *mgi = mgs_env_info(env);
+       struct llog_cfg_rec     *lcr;
        int rc;
 
        lustre_cfg_bufs_reset(&mgi->mgi_bufs, devname);
        lustre_cfg_bufs_set(&mgi->mgi_bufs, 1, desc, sizeof(*desc));
-       lcfg = lustre_cfg_new(LCFG_SETUP, &mgi->mgi_bufs);
-
-       rc = record_lcfg(env, llh, lcfg);
+       lcr = lustre_cfg_rec_new(LCFG_SETUP, &mgi->mgi_bufs);
+       if (lcr == NULL)
+               return -ENOMEM;
 
-       lustre_cfg_free(lcfg);
+       rc = llog_write(env, llh, &lcr->lcr_hdr, LLOG_NEXT_IDX);
+       lustre_cfg_rec_free(lcr);
        return rc;
 }
 
@@ -1330,7 +1335,7 @@ static int record_marker(const struct lu_env *env,
                          char *tgtname, char *comment)
 {
        struct mgs_thread_info *mgi = mgs_env_info(env);
-       struct lustre_cfg *lcfg;
+       struct llog_cfg_rec *lcr;
        int rc;
        int cplen = 0;
 
@@ -1352,12 +1357,12 @@ static int record_marker(const struct lu_env *env,
        lustre_cfg_bufs_reset(&mgi->mgi_bufs, NULL);
        lustre_cfg_bufs_set(&mgi->mgi_bufs, 1, &mgi->mgi_marker,
                            sizeof(mgi->mgi_marker));
-       lcfg = lustre_cfg_new(LCFG_MARKER, &mgi->mgi_bufs);
-       if (!lcfg)
+       lcr = lustre_cfg_rec_new(LCFG_MARKER, &mgi->mgi_bufs);
+       if (lcr == NULL)
                return -ENOMEM;
-       rc = record_lcfg(env, llh, lcfg);
 
-       lustre_cfg_free(lcfg);
+       rc = llog_write(env, llh, &lcr->lcr_hdr, LLOG_NEXT_IDX);
+       lustre_cfg_rec_free(lcr);
        return rc;
 }
 
@@ -1367,6 +1372,7 @@ static int record_start_log(const struct lu_env *env, struct mgs_device *mgs,
        static struct obd_uuid   cfg_uuid = { .uuid = "config_uuid" };
        struct llog_ctxt        *ctxt;
        int                      rc = 0;
+       ENTRY;
 
        if (*llh)
                GOTO(out, rc = -EBUSY);
@@ -1408,25 +1414,23 @@ static int record_end_log(const struct lu_env *env, struct llog_handle **llh)
 /* write an lcfg directly into a log (with markers) */
 static int mgs_write_log_direct(const struct lu_env *env,
                                struct mgs_device *mgs, struct fs_db *fsdb,
-                                char *logname, struct lustre_cfg *lcfg,
-                                char *devname, char *comment)
+                               char *logname, struct llog_cfg_rec *lcr,
+                               char *devname, char *comment)
 {
-        struct llog_handle *llh = NULL;
-        int rc;
-        ENTRY;
+       struct llog_handle *llh = NULL;
+       int rc;
 
-        if (!lcfg)
-                RETURN(-ENOMEM);
+       ENTRY;
 
        rc = record_start_log(env, mgs, &llh, logname);
-        if (rc)
-                RETURN(rc);
+       if (rc)
+               RETURN(rc);
 
         /* FIXME These should be a single journal transaction */
        rc = record_marker(env, llh, fsdb, CM_START, devname, comment);
        if (rc)
                GOTO(out_end, rc);
-       rc = record_lcfg(env, llh, lcfg);
+       rc = llog_write(env, llh, &lcr->lcr_hdr, LLOG_NEXT_IDX);
        if (rc)
                GOTO(out_end, rc);
        rc = record_marker(env, llh, fsdb, CM_END, devname, comment);
@@ -1438,78 +1442,60 @@ out_end:
 }
 
 /* write the lcfg in all logs for the given fs */
-int mgs_write_log_direct_all(const struct lu_env *env,
-                            struct mgs_device *mgs,
-                            struct fs_db *fsdb,
-                            struct mgs_target_info *mti,
-                            struct lustre_cfg *lcfg,
-                            char *devname, char *comment,
-                            int server_only)
+static int mgs_write_log_direct_all(const struct lu_env *env,
+                                   struct mgs_device *mgs,
+                                   struct fs_db *fsdb,
+                                   struct mgs_target_info *mti,
+                                   struct llog_cfg_rec *lcr, char *devname,
+                                   char *comment, int server_only)
 {
-       cfs_list_t list;
-       struct mgs_direntry *dirent, *n;
-        char *fsname = mti->mti_fsname;
-        char *logname;
-        int rc = 0, len = strlen(fsname);
-        ENTRY;
+       struct list_head         log_list;
+       struct mgs_direntry     *dirent, *n;
+       char                    *fsname = mti->mti_fsname;
+       int                      rc = 0, len = strlen(fsname);
 
-        /* We need to set params for any future logs
-           as well. FIXME Append this file to every new log.
-           Actually, we should store as params (text), not llogs.  Or
-           in a database. */
-       rc = name_create(&logname, fsname, "-params");
+       ENTRY;
+       /* Find all the logs in the CONFIGS directory */
+       rc = class_dentry_readdir(env, mgs, &log_list);
        if (rc)
                RETURN(rc);
-       if (mgs_log_is_empty(env, mgs, logname)) {
-               struct llog_handle *llh = NULL;
-               rc = record_start_log(env, mgs, &llh, logname);
-               record_end_log(env, &llh);
-        }
-        name_destroy(&logname);
-        if (rc)
-                RETURN(rc);
-
-        /* Find all the logs in the CONFIGS directory */
-       rc = class_dentry_readdir(env, mgs, &list);
-       if (rc)
-                RETURN(rc);
 
-        /* Could use fsdb index maps instead of directory listing */
-       cfs_list_for_each_entry_safe(dirent, n, &list, list) {
-               cfs_list_del(&dirent->list);
-                /* don't write to sptlrpc rule log */
-               if (strstr(dirent->name, "-sptlrpc") != NULL)
+       /* Could use fsdb index maps instead of directory listing */
+       list_for_each_entry_safe(dirent, n, &log_list, mde_list) {
+               list_del_init(&dirent->mde_list);
+               /* don't write to sptlrpc rule log */
+               if (strstr(dirent->mde_name, "-sptlrpc") != NULL)
                        goto next;
 
                /* caller wants write server logs only */
-               if (server_only && strstr(dirent->name, "-client") != NULL)
+               if (server_only && strstr(dirent->mde_name, "-client") != NULL)
                        goto next;
 
-               if (strncmp(fsname, dirent->name, len) == 0) {
-                       CDEBUG(D_MGS, "Changing log %s\n", dirent->name);
-                        /* Erase any old settings of this same parameter */
-                       rc = mgs_modify(env, mgs, fsdb, mti, dirent->name,
-                                       devname, comment, CM_SKIP);
-                       if (rc < 0)
-                               CERROR("%s: Can't modify llog %s: rc = %d\n",
-                                      mgs->mgs_obd->obd_name, dirent->name,rc);
-                        /* Write the new one */
-                        if (lcfg) {
-                               rc = mgs_write_log_direct(env, mgs, fsdb,
-                                                         dirent->name,
-                                                         lcfg, devname,
-                                                         comment);
-                                if (rc)
-                                       CERROR("%s: writing log %s: rc = %d\n",
-                                              mgs->mgs_obd->obd_name,
-                                              dirent->name, rc);
-                        }
-                }
+               if (strlen(dirent->mde_name) <= len ||
+                   strncmp(fsname, dirent->mde_name, len) != 0 ||
+                   dirent->mde_name[len] != '-')
+                       goto next;
+
+               CDEBUG(D_MGS, "Changing log %s\n", dirent->mde_name);
+               /* Erase any old settings of this same parameter */
+               rc = mgs_modify(env, mgs, fsdb, mti, dirent->mde_name,
+                               devname, comment, CM_SKIP);
+               if (rc < 0)
+                       CERROR("%s: Can't modify llog %s: rc = %d\n",
+                              mgs->mgs_obd->obd_name, dirent->mde_name, rc);
+               if (lcr == NULL)
+                       goto next;
+               /* Write the new one */
+               rc = mgs_write_log_direct(env, mgs, fsdb, dirent->mde_name,
+                                         lcr, devname, comment);
+               if (rc != 0)
+                       CERROR("%s: writing log %s: rc = %d\n",
+                              mgs->mgs_obd->obd_name, dirent->mde_name, rc);
 next:
                mgs_direntry_free(dirent);
-        }
+       }
 
-        RETURN(rc);
+       RETURN(rc);
 }
 
 static int mgs_write_log_osp_to_mdt(const struct lu_env *env,
@@ -1849,9 +1835,9 @@ static int mgs_write_log_lov(const struct lu_env *env, struct mgs_device *mgs,
         /* Defaults.  Can be changed later by lcfg config_param */
         lovdesc->ld_default_stripe_count = 1;
         lovdesc->ld_pattern = LOV_PATTERN_RAID0;
-        lovdesc->ld_default_stripe_size = 1024 * 1024;
+       lovdesc->ld_default_stripe_size = LOV_DESC_STRIPE_SIZE_DEFAULT;
         lovdesc->ld_default_stripe_offset = -1;
-        lovdesc->ld_qos_maxage = QOS_DEFAULT_MAXAGE;
+       lovdesc->ld_qos_maxage = LOV_DESC_QOS_MAXAGE_DEFAULT;
         sprintf((char*)lovdesc->ld_uuid.uuid, "%s_UUID", lovname);
         /* can these be the same? */
         uuid = (char *)lovdesc->ld_uuid.uuid;
@@ -1902,7 +1888,12 @@ static int mgs_write_log_failnids(const struct lu_env *env,
         #07 L add_conn 0:OSC_uml1_ost1_mdsA  1:uml2_UUID
         */
 
-        /* Pull failnid info out of params string */
+       /*
+        * Pull failnid info out of params string, which may contain something
+        * like "<nid1>,<nid2>:<nid3>,<nid4>".  class_parse_nid() does not
+        * complain about abnormal inputs like ",:<nid1>", "<nid1>:,<nid2>",
+        * etc.  However, convert_hostnames() should have caught those.
+        */
         while (class_find_param(ptr, PARAM_FAILNODE, &ptr) == 0) {
                 while (class_parse_nid(ptr, &nid, &ptr) == 0) {
                         if (failnodeuuid == NULL) {
@@ -1917,13 +1908,25 @@ static int mgs_write_log_failnids(const struct lu_env *env,
                                "client %s\n", libcfs_nid2str(nid),
                                failnodeuuid, cliname);
                        rc = record_add_uuid(env, llh, nid, failnodeuuid);
-                }
-               if (failnodeuuid)
+                       /*
+                        * If *ptr is ':', we have added all NIDs for
+                        * failnodeuuid.
+                        */
+                       if (*ptr == ':') {
+                               rc = record_add_conn(env, llh, cliname,
+                                                    failnodeuuid);
+                               name_destroy(&failnodeuuid);
+                               failnodeuuid = NULL;
+                       }
+               }
+               if (failnodeuuid) {
                        rc = record_add_conn(env, llh, cliname, failnodeuuid);
-        }
+                       name_destroy(&failnodeuuid);
+                       failnodeuuid = NULL;
+               }
+       }
 
-       name_destroy(&failnodeuuid);
-        return rc;
+       return rc;
 }
 
 static int mgs_write_log_mdc_to_lmv(const struct lu_env *env,
@@ -2684,45 +2687,51 @@ static int mgs_write_log_add_failnid(const struct lu_env *env,
 
 static int mgs_wlp_lcfg(const struct lu_env *env,
                        struct mgs_device *mgs, struct fs_db *fsdb,
-                        struct mgs_target_info *mti,
-                        char *logname, struct lustre_cfg_bufs *bufs,
-                        char *tgtname, char *ptr)
+                       struct mgs_target_info *mti,
+                       char *logname, struct lustre_cfg_bufs *bufs,
+                       char *tgtname, char *ptr)
 {
-        char comment[MTI_NAME_MAXLEN];
-        char *tmp;
-        struct lustre_cfg *lcfg;
-        int rc, del;
-
-        /* Erase any old settings of this same parameter */
-        memcpy(comment, ptr, MTI_NAME_MAXLEN);
-        comment[MTI_NAME_MAXLEN - 1] = 0;
-        /* But don't try to match the value. */
-        if ((tmp = strchr(comment, '=')))
-            *tmp = 0;
-        /* FIXME we should skip settings that are the same as old values */
+       char comment[MTI_NAME_MAXLEN];
+       char *tmp;
+       struct llog_cfg_rec *lcr;
+       int rc, del;
+
+       /* Erase any old settings of this same parameter */
+       memcpy(comment, ptr, MTI_NAME_MAXLEN);
+       comment[MTI_NAME_MAXLEN - 1] = 0;
+       /* But don't try to match the value. */
+       tmp = strchr(comment, '=');
+       if (tmp != NULL)
+               *tmp = 0;
+       /* FIXME we should skip settings that are the same as old values */
        rc = mgs_modify(env, mgs, fsdb, mti, logname, tgtname, comment,CM_SKIP);
        if (rc < 0)
                return rc;
-        del = mgs_param_empty(ptr);
+       del = mgs_param_empty(ptr);
 
-        LCONSOLE_INFO("%sing parameter %s.%s in log %s\n", del ? "Disabl" : rc ?
-                      "Sett" : "Modify", tgtname, comment, logname);
-        if (del)
-                return rc;
+       LCONSOLE_INFO("%s parameter %s.%s in log %s\n", del ? "Disabling" : rc ?
+                     "Setting" : "Modifying", tgtname, comment, logname);
+       if (del) {
+               /* mgs_modify() will return 1 if nothing had to be done */
+               if (rc == 1)
+                       rc = 0;
+               return rc;
+       }
 
-        lustre_cfg_bufs_reset(bufs, tgtname);
+       lustre_cfg_bufs_reset(bufs, tgtname);
        lustre_cfg_bufs_set_string(bufs, 1, ptr);
        if (mti->mti_flags & LDD_F_PARAM2)
                lustre_cfg_bufs_set_string(bufs, 2, LCTL_UPCALL);
 
-       lcfg = lustre_cfg_new((mti->mti_flags & LDD_F_PARAM2) ?
-                             LCFG_SET_PARAM : LCFG_PARAM, bufs);
+       lcr = lustre_cfg_rec_new((mti->mti_flags & LDD_F_PARAM2) ?
+                                LCFG_SET_PARAM : LCFG_PARAM, bufs);
+       if (lcr == NULL)
+               return -ENOMEM;
 
-        if (!lcfg)
-                return -ENOMEM;
-       rc = mgs_write_log_direct(env, mgs, fsdb, logname,lcfg,tgtname,comment);
-        lustre_cfg_free(lcfg);
-        return rc;
+       rc = mgs_write_log_direct(env, mgs, fsdb, logname, lcr, tgtname,
+                                 comment);
+       lustre_cfg_rec_free(lcr);
+       return rc;
 }
 
 static int mgs_write_log_param2(const struct lu_env *env,
@@ -2746,8 +2755,9 @@ static int mgs_write_log_sys(const struct lu_env *env,
                             struct mgs_device *mgs, struct fs_db *fsdb,
                             struct mgs_target_info *mti, char *sys, char *ptr)
 {
-       struct mgs_thread_info *mgi = mgs_env_info(env);
-       struct lustre_cfg *lcfg;
+       struct mgs_thread_info  *mgi = mgs_env_info(env);
+       struct lustre_cfg       *lcfg;
+       struct llog_cfg_rec     *lcr;
        char *tmp, sep;
        int rc, cmd, convert = 1;
 
@@ -2778,7 +2788,11 @@ static int mgs_write_log_sys(const struct lu_env *env,
        lustre_cfg_bufs_set_string(&mgi->mgi_bufs, 1, sys);
        if (!convert && *tmp != '\0')
                lustre_cfg_bufs_set_string(&mgi->mgi_bufs, 2, tmp);
-       lcfg = lustre_cfg_new(cmd, &mgi->mgi_bufs);
+       lcr = lustre_cfg_rec_new(cmd, &mgi->mgi_bufs);
+       if (lcr == NULL)
+               return -ENOMEM;
+
+       lcfg = &lcr->lcr_cfg;
        lcfg->lcfg_num = convert ? simple_strtoul(tmp, NULL, 0) : 0;
        /* truncate the comment to the parameter name */
        ptr = tmp - 1;
@@ -2786,7 +2800,7 @@ static int mgs_write_log_sys(const struct lu_env *env,
        *ptr = '\0';
        /* modify all servers and clients */
        rc = mgs_write_log_direct_all(env, mgs, fsdb, mti,
-                                     *tmp == '\0' ? NULL : lcfg,
+                                     *tmp == '\0' ? NULL : lcr,
                                      mti->mti_fsname, sys, 0);
        if (rc == 0 && *tmp != '\0') {
                switch (cmd) {
@@ -2803,7 +2817,7 @@ static int mgs_write_log_sys(const struct lu_env *env,
                }
        }
        *ptr = sep;
-       lustre_cfg_free(lcfg);
+       lustre_cfg_rec_free(lcr);
        return rc;
 }
 
@@ -2813,7 +2827,7 @@ static int mgs_write_log_quota(const struct lu_env *env, struct mgs_device *mgs,
                               char *quota, char *ptr)
 {
        struct mgs_thread_info  *mgi = mgs_env_info(env);
-       struct lustre_cfg       *lcfg;
+       struct llog_cfg_rec     *lcr;
        char                    *tmp;
        char                     sep;
        int                      rc, cmd = LCFG_PARAM;
@@ -2840,7 +2854,10 @@ static int mgs_write_log_quota(const struct lu_env *env, struct mgs_device *mgs,
 
        lustre_cfg_bufs_reset(&mgi->mgi_bufs, mti->mti_fsname);
        lustre_cfg_bufs_set_string(&mgi->mgi_bufs, 1, quota);
-       lcfg = lustre_cfg_new(cmd, &mgi->mgi_bufs);
+       lcr = lustre_cfg_rec_new(cmd, &mgi->mgi_bufs);
+       if (lcr == NULL)
+               return -ENOMEM;
+
        /* truncate the comment to the parameter name */
        ptr = tmp - 1;
        sep = *ptr;
@@ -2851,10 +2868,10 @@ static int mgs_write_log_quota(const struct lu_env *env, struct mgs_device *mgs,
         *     log once we cleanup the config log for global param. */
        /* modify all servers */
        rc = mgs_write_log_direct_all(env, mgs, fsdb, mti,
-                                     *tmp == '\0' ? NULL : lcfg,
+                                     *tmp == '\0' ? NULL : lcr,
                                      mti->mti_fsname, quota, 1);
        *ptr = sep;
-       lustre_cfg_free(lcfg);
+       lustre_cfg_rec_free(lcr);
        return rc < 0 ? rc : 0;
 }
 
@@ -2864,61 +2881,63 @@ static int mgs_srpc_set_param_disk(const struct lu_env *env,
                                    struct mgs_target_info *mti,
                                    char *param)
 {
-       struct mgs_thread_info *mgi = mgs_env_info(env);
-        struct llog_handle     *llh = NULL;
-        char                   *logname;
-        char                   *comment, *ptr;
-        struct lustre_cfg      *lcfg;
-        int                     rc, len;
-        ENTRY;
+       struct mgs_thread_info  *mgi = mgs_env_info(env);
+       struct llog_cfg_rec     *lcr;
+       struct llog_handle      *llh = NULL;
+       char                    *logname;
+       char                    *comment, *ptr;
+       int                      rc, len;
 
-        /* get comment */
-        ptr = strchr(param, '=');
-        LASSERT(ptr);
-        len = ptr - param;
+       ENTRY;
 
-        OBD_ALLOC(comment, len + 1);
-        if (comment == NULL)
-                RETURN(-ENOMEM);
-        strncpy(comment, param, len);
-        comment[len] = '\0';
+       /* get comment */
+       ptr = strchr(param, '=');
+       LASSERT(ptr != NULL);
+       len = ptr - param;
+
+       OBD_ALLOC(comment, len + 1);
+       if (comment == NULL)
+               RETURN(-ENOMEM);
+       strncpy(comment, param, len);
+       comment[len] = '\0';
 
-        /* prepare lcfg */
+       /* prepare lcfg */
        lustre_cfg_bufs_reset(&mgi->mgi_bufs, mti->mti_svname);
        lustre_cfg_bufs_set_string(&mgi->mgi_bufs, 1, param);
-       lcfg = lustre_cfg_new(LCFG_SPTLRPC_CONF, &mgi->mgi_bufs);
-        if (lcfg == NULL)
-                GOTO(out_comment, rc = -ENOMEM);
+       lcr = lustre_cfg_rec_new(LCFG_SPTLRPC_CONF, &mgi->mgi_bufs);
+       if (lcr == NULL)
+               GOTO(out_comment, rc = -ENOMEM);
 
-        /* construct log name */
-        rc = name_create(&logname, mti->mti_fsname, "-sptlrpc");
-        if (rc)
-                GOTO(out_lcfg, rc);
+       /* construct log name */
+       rc = name_create(&logname, mti->mti_fsname, "-sptlrpc");
+       if (rc < 0)
+               GOTO(out_lcfg, rc);
 
        if (mgs_log_is_empty(env, mgs, logname)) {
                rc = record_start_log(env, mgs, &llh, logname);
-                if (rc)
-                        GOTO(out, rc);
+               if (rc < 0)
+                       GOTO(out, rc);
                record_end_log(env, &llh);
-        }
+       }
 
-        /* obsolete old one */
+       /* obsolete old one */
        rc = mgs_modify(env, mgs, fsdb, mti, logname, mti->mti_svname,
                        comment, CM_SKIP);
        if (rc < 0)
                GOTO(out, rc);
-        /* write the new one */
-       rc = mgs_write_log_direct(env, mgs, fsdb, logname, lcfg,
-                                  mti->mti_svname, comment);
+       /* write the new one */
+       rc = mgs_write_log_direct(env, mgs, fsdb, logname, lcr,
+                                 mti->mti_svname, comment);
        if (rc)
-               CERROR("err %d writing log %s\n", rc, logname);
+               CERROR("%s: error writing log %s: rc = %d\n",
+                      mgs->mgs_obd->obd_name, logname, rc);
 out:
-        name_destroy(&logname);
+       name_destroy(&logname);
 out_lcfg:
-        lustre_cfg_free(lcfg);
+       lustre_cfg_rec_free(lcr);
 out_comment:
-        OBD_FREE(comment, len + 1);
-        RETURN(rc);
+       OBD_FREE(comment, len + 1);
+       RETURN(rc);
 }
 
 static int mgs_srpc_set_param_udesc_mem(struct fs_db *fsdb,
@@ -3106,8 +3125,7 @@ static int mgs_srpc_read_handler(const struct lu_env *env,
                 RETURN(-EINVAL);
         }
 
-        cfg_len = rec->lrh_len - sizeof(struct llog_rec_hdr) -
-                  sizeof(struct llog_rec_tail);
+       cfg_len = REC_DATA_LEN(rec);
 
         rc = lustre_cfg_sanity_check(lcfg, cfg_len);
         if (rc) {
@@ -3399,9 +3417,22 @@ static int mgs_write_log_param(const struct lu_env *env,
                if (rc)
                        GOTO(end, rc);
 
-                CDEBUG(D_MGS, "%.3s param %s\n", ptr, ptr + 4);
+               /* Forbid direct update of llite root squash parameters.
+                * These parameters are indirectly set via the MDT settings.
+                * See (LU-1778) */
+               if ((class_match_param(ptr, PARAM_LLITE, &tmp) == 0) &&
+                   ((memcmp(tmp, "root_squash=", 12) == 0) ||
+                    (memcmp(tmp, "nosquash_nids=", 14) == 0))) {
+                       LCONSOLE_ERROR("%s: root squash parameters can only "
+                               "be updated through MDT component\n",
+                               mti->mti_fsname);
+                       name_destroy(&cname);
+                       GOTO(end, rc = -EINVAL);
+               }
+
+               CDEBUG(D_MGS, "%.3s param %s\n", ptr, ptr + 4);
 
-                /* Modify client */
+               /* Modify client */
                rc = name_create(&logname, mti->mti_fsname, "-client");
                if (rc) {
                        name_destroy(&cname);
@@ -3437,13 +3468,13 @@ static int mgs_write_log_param(const struct lu_env *env,
                                }
                        }
                }
-                name_destroy(&logname);
-                name_destroy(&cname);
-                GOTO(end, rc);
-        }
+               name_destroy(&logname);
+               name_destroy(&cname);
+               GOTO(end, rc);
+       }
 
-        /* All mdt. params in proc */
-        if (class_match_param(ptr, PARAM_MDT, NULL) == 0) {
+       /* All mdt. params in proc */
+       if (class_match_param(ptr, PARAM_MDT, &tmp) == 0) {
                 int i;
                 __u32 idx;
 
@@ -3469,32 +3500,69 @@ static int mgs_write_log_param(const struct lu_env *env,
                                        goto active_err;
                                rc = mgs_wlp_lcfg(env, mgs, fsdb, mti,
                                                  logname, &mgi->mgi_bufs,
-                                                  logname, ptr);
-                                name_destroy(&logname);
-                                if (rc)
-                                        goto active_err;
-                        }
-                } else {
+                                                 logname, ptr);
+                               name_destroy(&logname);
+                               if (rc)
+                                       goto active_err;
+                       }
+               } else {
+                       if ((memcmp(tmp, "root_squash=", 12) == 0) ||
+                           (memcmp(tmp, "nosquash_nids=", 14) == 0)) {
+                               LCONSOLE_ERROR("%s: root squash parameters "
+                                       "cannot be applied to a single MDT\n",
+                                       mti->mti_fsname);
+                               GOTO(end, rc = -EINVAL);
+                       }
                        rc = mgs_wlp_lcfg(env, mgs, fsdb, mti,
                                          mti->mti_svname, &mgi->mgi_bufs,
-                                          mti->mti_svname, ptr);
-                        if (rc)
-                                goto active_err;
-                }
-                GOTO(end, rc);
-        }
+                                         mti->mti_svname, ptr);
+                       if (rc)
+                               goto active_err;
+               }
 
-        /* All mdd., ost. params in proc */
-        if ((class_match_param(ptr, PARAM_MDD, NULL) == 0) ||
-            (class_match_param(ptr, PARAM_OST, NULL) == 0)) {
-                CDEBUG(D_MGS, "%.3s param %s\n", ptr, ptr + 4);
+               /* root squash settings are also applied to llite
+                * config log (see LU-1778) */
+               if (rc == 0 &&
+                   ((memcmp(tmp, "root_squash=", 12) == 0) ||
+                    (memcmp(tmp, "nosquash_nids=", 14) == 0))) {
+                       char *cname;
+                       char *ptr2;
+
+                       rc = name_create(&cname, mti->mti_fsname, "-client");
+                       if (rc)
+                               GOTO(end, rc);
+                       rc = name_create(&logname, mti->mti_fsname, "-client");
+                       if (rc) {
+                               name_destroy(&cname);
+                               GOTO(end, rc);
+                       }
+                       rc = name_create(&ptr2, PARAM_LLITE, tmp);
+                       if (rc) {
+                               name_destroy(&cname);
+                               name_destroy(&logname);
+                               GOTO(end, rc);
+                       }
+                       rc = mgs_wlp_lcfg(env, mgs, fsdb, mti, logname,
+                                         &mgi->mgi_bufs, cname, ptr2);
+                       name_destroy(&ptr2);
+                       name_destroy(&logname);
+                       name_destroy(&cname);
+               }
+               GOTO(end, rc);
+       }
+
+       /* All mdd., ost. and osd. params in proc */
+       if ((class_match_param(ptr, PARAM_MDD, NULL) == 0) ||
+           (class_match_param(ptr, PARAM_OST, NULL) == 0) ||
+           (class_match_param(ptr, PARAM_OSD, NULL) == 0)) {
+               CDEBUG(D_MGS, "%.3s param %s\n", ptr, ptr + 4);
                if (mgs_log_is_empty(env, mgs, mti->mti_svname))
-                        GOTO(end, rc = -ENODEV);
+                       GOTO(end, rc = -ENODEV);
 
                rc = mgs_wlp_lcfg(env, mgs, fsdb, mti, mti->mti_svname,
                                  &mgi->mgi_bufs, mti->mti_svname, ptr);
-                GOTO(end, rc);
-        }
+               GOTO(end, rc);
+       }
 
         LCONSOLE_WARN("Ignoring unrecognized param '%s'\n", ptr);
         rc2 = -ENOSYS;
@@ -3532,27 +3600,26 @@ int mgs_check_failnid(const struct lu_env *env, struct mgs_device *mgs,
        mutex_lock(&fsdb->fsdb_mutex);
         rc = mgs_write_log_add_failnid(obd, fsdb, mti);
        mutex_unlock(&fsdb->fsdb_mutex);
+       char    *buf, *params;
+       int      rc = -EINVAL;
 
         RETURN(rc);
 #endif
         return 0;
 }
 
-int mgs_write_log_target(const struct lu_env *env,
-                        struct mgs_device *mgs,
-                         struct mgs_target_info *mti,
-                         struct fs_db *fsdb)
+int mgs_write_log_target(const struct lu_env *env, struct mgs_device *mgs,
+                        struct mgs_target_info *mti, struct fs_db *fsdb)
 {
-        int rc = -EINVAL;
-        char *buf, *params;
-        ENTRY;
+       char    *buf, *params;
+       int      rc = -EINVAL;
+
+       ENTRY;
 
-        /* set/check the new target index */
+       /* set/check the new target index */
        rc = mgs_set_index(env, mgs, mti);
-        if (rc < 0) {
-                CERROR("Can't get index (%d)\n", rc);
-                RETURN(rc);
-        }
+       if (rc < 0)
+               RETURN(rc);
 
        if (rc == EALREADY) {
                LCONSOLE_WARN("Found index %d for %s, updating log\n",
@@ -3648,14 +3715,14 @@ int mgs_erase_log(const struct lu_env *env, struct mgs_device *mgs, char *name)
 int mgs_erase_logs(const struct lu_env *env, struct mgs_device *mgs, char *fsname)
 {
        struct fs_db *fsdb;
-       cfs_list_t list;
+       struct list_head log_list;
        struct mgs_direntry *dirent, *n;
        int rc, len = strlen(fsname);
        char *suffix;
        ENTRY;
 
        /* Find all the logs in the CONFIGS directory */
-       rc = class_dentry_readdir(env, mgs, &list);
+       rc = class_dentry_readdir(env, mgs, &log_list);
        if (rc)
                RETURN(rc);
 
@@ -3668,15 +3735,15 @@ int mgs_erase_logs(const struct lu_env *env, struct mgs_device *mgs, char *fsnam
 
        mutex_unlock(&mgs->mgs_mutex);
 
-       cfs_list_for_each_entry_safe(dirent, n, &list, list) {
-               cfs_list_del(&dirent->list);
-               suffix = strrchr(dirent->name, '-');
+       list_for_each_entry_safe(dirent, n, &log_list, mde_list) {
+               list_del_init(&dirent->mde_list);
+               suffix = strrchr(dirent->mde_name, '-');
                if (suffix != NULL) {
-                       if ((len == suffix - dirent->name) &&
-                           (strncmp(fsname, dirent->name, len) == 0)) {
+                       if ((len == suffix - dirent->mde_name) &&
+                           (strncmp(fsname, dirent->mde_name, len) == 0)) {
                                CDEBUG(D_MGS, "Removing log %s\n",
-                                      dirent->name);
-                               mgs_erase_log(env, mgs, dirent->name);
+                                      dirent->mde_name);
+                               mgs_erase_log(env, mgs, dirent->mde_name);
                        }
                }
                mgs_direntry_free(dirent);
@@ -3685,6 +3752,40 @@ int mgs_erase_logs(const struct lu_env *env, struct mgs_device *mgs, char *fsnam
         RETURN(rc);
 }
 
+/* list all logs for the given fs */
+int mgs_list_logs(const struct lu_env *env, struct mgs_device *mgs,
+                 struct obd_ioctl_data *data)
+{
+       struct list_head         log_list;
+       struct mgs_direntry     *dirent, *n;
+       char                    *out, *suffix;
+       int                      l, remains, rc;
+
+       ENTRY;
+
+       /* Find all the logs in the CONFIGS directory */
+       rc = class_dentry_readdir(env, mgs, &log_list);
+       if (rc)
+               RETURN(rc);
+
+       out = data->ioc_bulk;
+       remains = data->ioc_inllen1;
+       list_for_each_entry_safe(dirent, n, &log_list, mde_list) {
+               list_del_init(&dirent->mde_list);
+               suffix = strrchr(dirent->mde_name, '-');
+               if (suffix != NULL) {
+                       l = snprintf(out, remains, "config log: $%s\n",
+                                    dirent->mde_name);
+                       out += l;
+                       remains -= l;
+               }
+               mgs_direntry_free(dirent);
+               if (remains <= 0)
+                       break;
+       }
+       RETURN(rc);
+}
+
 /* from llog_swab */
 static void print_lustre_cfg(struct lustre_cfg *lcfg)
 {
@@ -3709,6 +3810,34 @@ static void print_lustre_cfg(struct lustre_cfg *lcfg)
         EXIT;
 }
 
+/* Setup params fsdb and log
+ */
+int mgs_params_fsdb_setup(const struct lu_env *env, struct mgs_device *mgs,
+                         struct fs_db *fsdb)
+{
+       struct llog_handle      *params_llh = NULL;
+       int                     rc;
+       ENTRY;
+
+       rc = mgs_find_or_make_fsdb(env, mgs, PARAMS_FILENAME, &fsdb);
+       if (fsdb != NULL) {
+               mutex_lock(&fsdb->fsdb_mutex);
+               rc = record_start_log(env, mgs, &params_llh, PARAMS_FILENAME);
+               if (rc == 0)
+                       rc = record_end_log(env, &params_llh);
+               mutex_unlock(&fsdb->fsdb_mutex);
+       }
+
+       RETURN(rc);
+}
+
+/* Cleanup params fsdb and log
+ */
+int mgs_params_fsdb_cleanup(const struct lu_env *env, struct mgs_device *mgs)
+{
+       return mgs_erase_logs(env, mgs, PARAMS_FILENAME);
+}
+
 /* Set a permanent (config log) param for a target or fs
  * \param lcfg buf0 may contain the device (testfs-MDT0000) name
  *             buf1 contains the single parameter
@@ -3749,13 +3878,11 @@ int mgs_setparam(const struct lu_env *env, struct mgs_device *mgs,
        if (rc == 0 && !mgs_parse_devname(devname, NULL, &index)) {
                 /* param related to llite isn't allowed to set by OST or MDT */
                if (rc == 0 && strncmp(param, PARAM_LLITE,
-                                  sizeof(PARAM_LLITE)) == 0)
+                                      sizeof(PARAM_LLITE) - 1) == 0)
                         RETURN(-EINVAL);
         } else {
                 /* assume devname is the fsname */
-               memset(fsname, 0, MTI_NAME_MAXLEN);
-                strncpy(fsname, devname, MTI_NAME_MAXLEN);
-               fsname[MTI_NAME_MAXLEN - 1] = 0;
+               strlcpy(fsname, devname, MTI_NAME_MAXLEN);
         }
         CDEBUG(D_MGS, "setparam fs='%s' device='%s'\n", fsname, devname);
 
@@ -3823,9 +3950,9 @@ out:
 
 static int mgs_write_log_pool(const struct lu_env *env,
                              struct mgs_device *mgs, char *logname,
-                              struct fs_db *fsdb, char *lovname,
+                             struct fs_db *fsdb, char *tgtname,
                               enum lcfg_command_type cmd,
-                              char *poolname, char *fsname,
+                             char *fsname, char *poolname,
                               char *ostname, char *comment)
 {
         struct llog_handle *llh = NULL;
@@ -3834,18 +3961,96 @@ static int mgs_write_log_pool(const struct lu_env *env,
        rc = record_start_log(env, mgs, &llh, logname);
        if (rc)
                return rc;
-       rc = record_marker(env, llh, fsdb, CM_START, lovname, comment);
+       rc = record_marker(env, llh, fsdb, CM_START, tgtname, comment);
        if (rc)
                goto out;
-       rc = record_base(env, llh, lovname, 0, cmd, poolname, fsname, ostname, 0);
+       rc = record_base(env, llh, tgtname, 0, cmd,
+                        fsname, poolname, ostname, 0);
        if (rc)
                goto out;
-       rc = record_marker(env, llh, fsdb, CM_END, lovname, comment);
+       rc = record_marker(env, llh, fsdb, CM_END, tgtname, comment);
 out:
        record_end_log(env, &llh);
         return rc;
 }
 
+int mgs_nodemap_cmd(const struct lu_env *env, struct mgs_device *mgs,
+                   enum lcfg_command_type cmd, const char *nodemap_name,
+                   char *param)
+{
+       lnet_nid_t      nid[2];
+       __u32           idmap[2];
+       bool            bool_switch;
+       __u32           int_id;
+       int             rc = 0;
+       ENTRY;
+
+       switch (cmd) {
+       case LCFG_NODEMAP_ADD:
+               rc = nodemap_add(nodemap_name);
+               break;
+       case LCFG_NODEMAP_DEL:
+               rc = nodemap_del(nodemap_name);
+               break;
+       case LCFG_NODEMAP_ADD_RANGE:
+               rc = nodemap_parse_range(param, nid);
+               if (rc != 0)
+                       break;
+               rc = nodemap_add_range(nodemap_name, nid);
+               break;
+       case LCFG_NODEMAP_DEL_RANGE:
+               rc = nodemap_parse_range(param, nid);
+               if (rc != 0)
+                       break;
+               rc = nodemap_del_range(nodemap_name, nid);
+               break;
+       case LCFG_NODEMAP_ADMIN:
+               bool_switch = simple_strtoul(param, NULL, 10);
+               rc = nodemap_set_allow_root(nodemap_name, bool_switch);
+               break;
+       case LCFG_NODEMAP_TRUSTED:
+               bool_switch = simple_strtoul(param, NULL, 10);
+               rc = nodemap_set_trust_client_ids(nodemap_name, bool_switch);
+               break;
+       case LCFG_NODEMAP_SQUASH_UID:
+               int_id = simple_strtoul(param, NULL, 10);
+               rc = nodemap_set_squash_uid(nodemap_name, int_id);
+               break;
+       case LCFG_NODEMAP_SQUASH_GID:
+               int_id = simple_strtoul(param, NULL, 10);
+               rc = nodemap_set_squash_gid(nodemap_name, int_id);
+               break;
+       case LCFG_NODEMAP_ADD_UIDMAP:
+       case LCFG_NODEMAP_ADD_GIDMAP:
+               rc = nodemap_parse_idmap(param, idmap);
+               if (rc != 0)
+                       break;
+               if (cmd == LCFG_NODEMAP_ADD_UIDMAP)
+                       rc = nodemap_add_idmap(nodemap_name, NODEMAP_UID,
+                                              idmap);
+               else
+                       rc = nodemap_add_idmap(nodemap_name, NODEMAP_GID,
+                                              idmap);
+               break;
+       case LCFG_NODEMAP_DEL_UIDMAP:
+       case LCFG_NODEMAP_DEL_GIDMAP:
+               rc = nodemap_parse_idmap(param, idmap);
+               if (rc != 0)
+                       break;
+               if (cmd == LCFG_NODEMAP_DEL_UIDMAP)
+                       rc = nodemap_del_idmap(nodemap_name, NODEMAP_UID,
+                                              idmap);
+               else
+                       rc = nodemap_del_idmap(nodemap_name, NODEMAP_GID,
+                                              idmap);
+               break;
+       default:
+               rc = -EINVAL;
+       }
+
+       RETURN(rc);
+}
+
 int mgs_pool_cmd(const struct lu_env *env, struct mgs_device *mgs,
                 enum lcfg_command_type cmd, char *fsname,
                 char *poolname, char *ostname)