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[fs/lustre-release.git] / lustre / obdfilter / filter.c
index e60e2b5..fdccecc 100644 (file)
@@ -80,7 +80,7 @@
 #include "filter_internal.h"
 
 /* Group 0 is no longer a legal group, to catch uninitialized IDs */
-#define FILTER_MIN_GROUPS FILTER_GROUP_MDS0
+#define FILTER_MIN_GROUPS FILTER_GROUP_MDS1_N_BASE
 static struct lvfs_callback_ops filter_lvfs_ops;
 cfs_mem_cache_t *ll_fmd_cachep;
 
@@ -135,7 +135,7 @@ int filter_finish_transno(struct obd_export *exp, struct obd_trans_info *oti,
                 err = -EINVAL;
         } else {
                 if (!force_sync)
-                        force_sync = fsfilt_add_journal_cb(exp->exp_obd, 
+                        force_sync = fsfilt_add_journal_cb(exp->exp_obd,
                                                            last_rcvd,
                                                            oti->oti_handle,
                                                            filter_commit_cb,
@@ -202,19 +202,21 @@ static int filter_export_stats_init(struct obd_device *obd,
                                     struct obd_export *exp,
                                     void *client_nid)
 {
-        struct filter_export_data *fed = &exp->exp_filter_data;
         int rc, newnid = 0;
         ENTRY;
 
-        init_brw_stats(&fed->fed_brw_stats);
-
         if (obd_uuid_equals(&exp->exp_client_uuid, &obd->obd_uuid))
                 /* Self-export gets no proc entry */
                 RETURN(0);
 
         rc = lprocfs_exp_setup(exp, client_nid, &newnid);
-        if (rc)
+        if (rc) {
+                /* Mask error for already created
+                 * /proc entries */
+                if (rc == -EALREADY)
+                        rc = 0;
                 RETURN(rc);
+        }
 
         if (newnid) {
                 struct nid_stat *tmp = exp->exp_nid_stats;
@@ -239,6 +241,17 @@ static int filter_export_stats_init(struct obd_device *obd,
                                             tmp->nid_stats);
                 if (rc)
                         RETURN(rc);
+                /* Always add in ldlm_stats */
+                tmp->nid_ldlm_stats = lprocfs_alloc_stats(LDLM_LAST_OPC -
+                                                          LDLM_FIRST_OPC, 0);
+                if (tmp->nid_ldlm_stats == NULL)
+                        return -ENOMEM;
+
+                lprocfs_init_ldlm_stats(tmp->nid_ldlm_stats);
+                rc = lprocfs_register_stats(tmp->nid_proc, "ldlm_stats",
+                                            tmp->nid_ldlm_stats);
+                if (rc)
+                        RETURN(rc);
         }
 
         RETURN(0);
@@ -255,7 +268,7 @@ static int filter_client_add(struct obd_device *obd, struct obd_export *exp,
         struct filter_export_data *fed = &exp->exp_filter_data;
         unsigned long *bitmap = filter->fo_last_rcvd_slots;
         int new_client = (cl_idx == -1);
+
         ENTRY;
 
         LASSERT(bitmap != NULL);
@@ -341,12 +354,13 @@ static int filter_client_add(struct obd_device *obd, struct obd_export *exp,
         RETURN(0);
 }
 
+struct lsd_client_data zero_lcd; /* globals are implicitly zeroed */
+
 static int filter_client_free(struct obd_export *exp)
 {
         struct filter_export_data *fed = &exp->exp_filter_data;
         struct filter_obd *filter = &exp->exp_obd->u.filter;
         struct obd_device *obd = exp->exp_obd;
-        struct lsd_client_data zero_lcd;
         struct lvfs_run_ctxt saved;
         int rc;
         loff_t off;
@@ -383,23 +397,26 @@ static int filter_client_free(struct obd_export *exp)
         }
 
         if (!(exp->exp_flags & OBD_OPT_FAILOVER)) {
-                memset(&zero_lcd, 0, sizeof zero_lcd);
+                /* Don't force sync on disconnect if aborting recovery,
+                 * or it does num_clients * num_osts.  b=17194 */
+                int need_sync = (!exp->exp_libclient || exp->exp_need_sync) &&
+                                 !(exp->exp_flags&OBD_OPT_ABORT_RECOV);
                 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
                 rc = fsfilt_write_record(obd, filter->fo_rcvd_filp, &zero_lcd,
-                                         sizeof(zero_lcd), &off,
-                                         (!exp->exp_libclient ||
-                                          exp->exp_need_sync));
+                                         sizeof(zero_lcd), &off, 0);
+
+                /* Make sure the server's last_transno is up to date. Do this
+                 * after the client is freed so we know all the client's
+                 * transactions have been committed. */
                 if (rc == 0)
-                        /* update server's transno */
                         filter_update_server_data(obd, filter->fo_rcvd_filp,
-                                                  filter->fo_fsd,
-                                                  !exp->exp_libclient);
+                                                  filter->fo_fsd, need_sync);
                 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 
                 CDEBUG(rc == 0 ? D_INFO : D_ERROR,
-                       "zeroing out client %s at idx %u (%llu) in %s rc %d\n",
+                       "zero out client %s at idx %u/%llu in %s %ssync rc %d\n",
                        fed->fed_lcd->lcd_uuid, fed->fed_lr_idx, fed->fed_lr_off,
-                       LAST_RCVD, rc);
+                       LAST_RCVD, need_sync ? "" : "a", rc);
         }
 
         if (!test_and_clear_bit(fed->fed_lr_idx, filter->fo_last_rcvd_slots)) {
@@ -525,7 +542,7 @@ struct filter_mod_data *filter_fmd_get(struct obd_export *exp,
         struct filter_export_data *fed = &exp->exp_filter_data;
         struct filter_mod_data *found = NULL, *fmd_new = NULL;
 
-        OBD_SLAB_ALLOC(fmd_new, ll_fmd_cachep, CFS_ALLOC_IO, sizeof(*fmd_new));
+        OBD_SLAB_ALLOC_PTR_GFP(fmd_new, ll_fmd_cachep, CFS_ALLOC_IO);
 
         spin_lock(&fed->fed_lock);
         found = filter_fmd_find_nolock(&exp->exp_obd->u.filter,fed,objid,group);
@@ -596,7 +613,7 @@ static int filter_init_export(struct obd_export *exp)
         exp->exp_connecting = 1;
         spin_unlock(&exp->exp_lock);
 
-        return 0;
+        return ldlm_init_export(exp);
 }
 
 static int filter_free_server_data(struct filter_obd *filter)
@@ -939,7 +956,9 @@ static int filter_update_last_group(struct obd_device *obd, int group)
                 CDEBUG(D_INODE, "error reading LAST_GROUP: rc %d\n",rc);
                 GOTO(cleanup, rc);
         }
-        LASSERT(off == 0 || last_group >= FILTER_MIN_GROUPS);
+        LASSERTF(off == 0 || CHECK_MDS_GROUP(last_group),
+                 "off = %llu and last_group = %d\n", off, last_group);
+
         CDEBUG(D_INODE, "%s: previous %d, new %d\n",
                obd->obd_name, last_group, group);
 
@@ -987,7 +1006,7 @@ static int filter_read_group_internal(struct obd_device *obd, int group,
                         RETURN(PTR_ERR(dentry));
                 }
         } else {
-                dentry = simple_mkdir(filter->fo_dentry_O, filter->fo_vfsmnt, 
+                dentry = simple_mkdir(filter->fo_dentry_O, filter->fo_vfsmnt,
                                       name, 0700, 1);
                 if (IS_ERR(dentry)) {
                         CERROR("cannot lookup/create O/%s: rc = %ld\n", name,
@@ -1022,7 +1041,7 @@ static int filter_read_group_internal(struct obd_device *obd, int group,
                         char dir[20];
                         snprintf(dir, sizeof(dir), "d%u", i);
 
-                        tmp_subdirs->dentry[i] = simple_mkdir(dentry, 
+                        tmp_subdirs->dentry[i] = simple_mkdir(dentry,
                                                               filter->fo_vfsmnt,
                                                               dir, 0700, 1);
                         if (IS_ERR(tmp_subdirs->dentry[i])) {
@@ -1129,8 +1148,6 @@ static int filter_read_groups(struct obd_device *obd, int last_group,
         down(&filter->fo_init_lock);
         old_count = filter->fo_group_count;
         for (group = old_count; group <= last_group; group++) {
-                if (group == 0)
-                        continue; /* no group zero */
 
                 rc = filter_read_group_internal(obd, group, create);
                 if (rc != 0)
@@ -1150,7 +1167,7 @@ static int filter_prep_groups(struct obd_device *obd)
         loff_t off = 0;
         ENTRY;
 
-        O_dentry = simple_mkdir(current->fs->pwd, filter->fo_vfsmnt, 
+        O_dentry = simple_mkdir(current->fs->pwd, filter->fo_vfsmnt,
                                 "O", 0700, 1);
         CDEBUG(D_INODE, "got/created O: %p\n", O_dentry);
         if (IS_ERR(O_dentry)) {
@@ -1229,7 +1246,7 @@ static int filter_prep_groups(struct obd_device *obd)
         if (off == 0) {
                 last_group = FILTER_MIN_GROUPS;
         } else {
-                LASSERT(last_group >= FILTER_MIN_GROUPS);
+                LASSERT_MDS_GROUP(last_group);
         }
 
         CWARN("%s: initialize groups [%d,%d]\n", obd->obd_name,
@@ -1353,7 +1370,7 @@ static void filter_post(struct obd_device *obd)
         if (rc)
                 CERROR("error writing server data: rc = %d\n", rc);
 
-        for (i = 1; i < filter->fo_group_count; i++) {
+        for (i = 0; i < filter->fo_group_count; i++) {
                 rc = filter_update_last_objid(obd, i,
                                 (i == filter->fo_group_count - 1));
                 if (rc)
@@ -1400,13 +1417,12 @@ obd_id filter_last_id(struct filter_obd *filter, obd_gr group)
         spin_lock(&filter->fo_objidlock);
         id = filter->fo_last_objids[group];
         spin_unlock(&filter->fo_objidlock);
-
         return id;
 }
 
 static int filter_lock_dentry(struct obd_device *obd, struct dentry *dparent)
 {
-        LOCK_INODE_MUTEX(dparent->d_inode);
+        LOCK_INODE_MUTEX_PARENT(dparent->d_inode);
         return 0;
 }
 
@@ -1417,7 +1433,8 @@ struct dentry *filter_parent(struct obd_device *obd, obd_gr group, obd_id objid)
         struct filter_subdirs *subdirs;
         LASSERT(group < filter->fo_group_count); /* FIXME: object groups */
 
-        if (group > 0 || filter->fo_subdir_count == 0)
+        if ((group > FILTER_GROUP_MDS0 && group < FILTER_GROUP_MDS1_N_BASE) ||
+             filter->fo_subdir_count == 0)
                 return filter->fo_dentry_O_groups[group];
 
         subdirs = &filter->fo_dentry_O_sub[group];
@@ -1528,7 +1545,7 @@ static int filter_prepare_destroy(struct obd_device *obd, obd_id objid,
         rc = ldlm_cli_enqueue_local(obd->obd_namespace, &res_id, LDLM_EXTENT,
                                     &policy, LCK_PW, &flags, ldlm_blocking_ast,
                                     ldlm_completion_ast, NULL, NULL, 0, NULL,
-                                    &lockh);
+                                    NULL, &lockh);
 
         /* We only care about the side-effects, just drop the lock. */
         if (rc == ELDLM_OK)
@@ -1651,7 +1668,7 @@ static enum interval_iter filter_intent_cb(struct interval_node *n,
                         *v = LDLM_LOCK_GET(lck);
                 } else if ((*v)->l_policy_data.l_extent.start <
                            lck->l_policy_data.l_extent.start) {
-                        LDLM_LOCK_PUT(*v);
+                        LDLM_LOCK_RELEASE(*v);
                         *v = LDLM_LOCK_GET(lck);
                 }
 
@@ -1720,7 +1737,7 @@ static int filter_intent_policy(struct ldlm_namespace *ns,
                 LASSERT(lock->l_flags & LDLM_FL_CP_REQD);
                 lock->l_flags &= ~LDLM_FL_CP_REQD;
                 list_del_init(&wlock->l_cp_ast);
-                LDLM_LOCK_PUT(wlock);
+                LDLM_LOCK_RELEASE(wlock);
         }
 
         /* The lock met with no resistance; we're finished. */
@@ -1764,7 +1781,7 @@ static int filter_intent_policy(struct ldlm_namespace *ns,
                 if (tree->lit_mode == LCK_PR)
                         continue;
 
-                interval_iterate_reverse(tree->lit_root, 
+                interval_iterate_reverse(tree->lit_root,
                                          filter_intent_cb, &arg);
         }
         unlock_res(res);
@@ -1816,7 +1833,7 @@ static int filter_intent_policy(struct ldlm_namespace *ns,
         unlock_res(res);
 
  out:
-        LDLM_LOCK_PUT(l);
+        LDLM_LOCK_RELEASE(l);
 
         RETURN(ELDLM_LOCK_ABORTED);
 }
@@ -1872,6 +1889,30 @@ static void filter_iobuf_pool_done(struct filter_obd *filter)
         EXIT;
 }
 
+static int filter_adapt_sptlrpc_conf(struct obd_device *obd, int initial)
+{
+        struct filter_obd       *filter = &obd->u.filter;
+        struct sptlrpc_rule_set  tmp_rset;
+        int                      rc;
+
+        sptlrpc_rule_set_init(&tmp_rset);
+        rc = sptlrpc_conf_target_get_rules(obd, &tmp_rset, initial);
+        if (rc) {
+                CERROR("obd %s: failed get sptlrpc rules: %d\n",
+                       obd->obd_name, rc);
+                return rc;
+        }
+
+        sptlrpc_target_update_exp_flavor(obd, &tmp_rset);
+
+        write_lock(&filter->fo_sptlrpc_lock);
+        sptlrpc_rule_set_free(&filter->fo_sptlrpc_rset);
+        filter->fo_sptlrpc_rset = tmp_rset;
+        write_unlock(&filter->fo_sptlrpc_lock);
+
+        return 0;
+}
+
 /*
  * pre-allocate pool of iobuf's to be used by filter_{prep,commit}rw_write().
  */
@@ -1898,7 +1939,8 @@ static int filter_iobuf_pool_init(struct filter_obd *filter)
  * If we haven't allocated a pool entry for this thread before, do so now. */
 void *filter_iobuf_get(struct filter_obd *filter, struct obd_trans_info *oti)
 {
-        int thread_id                    = oti ? oti->oti_thread_id : -1;
+        int thread_id                    = (oti && oti->oti_thread) ?
+                                           oti->oti_thread->t_id : -1;
         struct filter_iobuf  *pool       = NULL;
         struct filter_iobuf **pool_place = NULL;
 
@@ -1971,7 +2013,11 @@ int filter_common_setup(struct obd_device *obd, struct lustre_cfg* lcfg,
         if (rc != 0)
                 GOTO(err_ops, rc);
 
-        LASSERT(!lvfs_check_rdonly(lvfs_sbdev(mnt->mnt_sb)));
+        if (lvfs_check_rdonly(lvfs_sbdev(mnt->mnt_sb))) {
+                CERROR("%s: Underlying device is marked as read-only. "
+                       "Setup failed\n", obd->obd_name);
+                GOTO(err_ops, rc = -EROFS);
+        }
 
         /* failover is the default */
         obd->obd_replayable = 1;
@@ -2013,6 +2059,8 @@ int filter_common_setup(struct obd_device *obd, struct lustre_cfg* lcfg,
         CFS_INIT_LIST_HEAD(&filter->fo_export_list);
         sema_init(&filter->fo_alloc_lock, 1);
         init_brw_stats(&filter->fo_filter_stats);
+        filter->fo_read_cache = 1; /* enable read-only cache by default */
+        filter->fo_writethrough_cache = 1; /* enable writethrough cache */
         filter->fo_readcache_max_filesize = FILTER_MAX_CACHE_SIZE;
         filter->fo_fmd_max_num = FILTER_FMD_MAX_NUM_DEFAULT;
         filter->fo_fmd_max_age = FILTER_FMD_MAX_AGE_DEFAULT;
@@ -2020,10 +2068,7 @@ int filter_common_setup(struct obd_device *obd, struct lustre_cfg* lcfg,
         CFS_INIT_LIST_HEAD(&filter->fo_llog_list);
         spin_lock_init(&filter->fo_llog_list_lock);
 
-        filter->fo_sptlrpc_lock = RW_LOCK_UNLOCKED;
-        sptlrpc_rule_set_init(&filter->fo_sptlrpc_rset);
-
-        filter->fo_fl_oss_capa = 0;
+        filter->fo_fl_oss_capa = 1;
         CFS_INIT_LIST_HEAD(&filter->fo_capa_keys);
         filter->fo_capa_hash = init_capa_hash();
         if (filter->fo_capa_hash == NULL)
@@ -2041,12 +2086,17 @@ int filter_common_setup(struct obd_device *obd, struct lustre_cfg* lcfg,
         ptlrpc_init_client(LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL,
                            "filter_ldlm_cb_client", &obd->obd_ldlm_client);
 
-        rc = llog_cat_initialize(obd, &obd->obd_olg, 1, NULL);
+        rc = obd_llog_init(obd, &obd->obd_olg, obd, 1, NULL, NULL);
         if (rc) {
                 CERROR("failed to setup llogging subsystems\n");
                 GOTO(err_post, rc);
         }
 
+        rwlock_init(&filter->fo_sptlrpc_lock);
+        sptlrpc_rule_set_init(&filter->fo_sptlrpc_rset);
+        /* do this after llog being initialized */
+        filter_adapt_sptlrpc_conf(obd, 1);
+
         rc = lquota_setup(filter_quota_interface_ref, obd);
         if (rc)
                 GOTO(err_post, rc);
@@ -2136,6 +2186,21 @@ static int filter_setup(struct obd_device *obd, struct lustre_cfg* lcfg)
                 lprocfs_counter_init(obd->obd_stats, LPROC_FILTER_WRITE_BYTES,
                                      LPROCFS_CNTR_AVGMINMAX,
                                      "write_bytes", "bytes");
+                lprocfs_counter_init(obd->obd_stats, LPROC_FILTER_GET_PAGE,
+                                     LPROCFS_CNTR_AVGMINMAX|LPROCFS_CNTR_STDDEV,
+                                     "get_page", "usec");
+                lprocfs_counter_init(obd->obd_stats, LPROC_FILTER_NO_PAGE,
+                                     LPROCFS_CNTR_AVGMINMAX,
+                                     "get_page_failures", "num");
+                lprocfs_counter_init(obd->obd_stats, LPROC_FILTER_CACHE_ACCESS,
+                                     LPROCFS_CNTR_AVGMINMAX,
+                                     "cache_access", "pages");
+                lprocfs_counter_init(obd->obd_stats, LPROC_FILTER_CACHE_HIT,
+                                     LPROCFS_CNTR_AVGMINMAX,
+                                     "cache_hit", "pages");
+                lprocfs_counter_init(obd->obd_stats, LPROC_FILTER_CACHE_MISS,
+                                     LPROCFS_CNTR_AVGMINMAX,
+                                     "cache_miss", "pages");
 
                 lproc_filter_attach_seqstat(obd);
                 obd->obd_proc_exports_entry = lprocfs_register("exports",
@@ -2151,7 +2216,7 @@ static int filter_setup(struct obd_device *obd, struct lustre_cfg* lcfg)
         if (obd->obd_proc_exports_entry)
                 lprocfs_add_simple(obd->obd_proc_exports_entry, "clear",
                                    lprocfs_nid_stats_clear_read,
-                                   lprocfs_nid_stats_clear_write, obd);
+                                   lprocfs_nid_stats_clear_write, obd, NULL);
 
         memcpy((void *)addr, lustre_cfg_buf(lcfg, 4),
                LUSTRE_CFG_BUFLEN(lcfg, 4));
@@ -2187,15 +2252,23 @@ static int filter_olg_fini(struct obd_llog_group *olg)
                 rc = llog_cleanup(ctxt);
 
         ctxt = llog_group_get_ctxt(olg, LLOG_SIZE_ORIG_CTXT);
-        if (ctxt)
+        if (ctxt) {
                 rc2 = llog_cleanup(ctxt);
-        if (!rc)
-                rc = rc2;
+                if (!rc)
+                        rc = rc2;
+        }
+
+        ctxt = llog_group_get_ctxt(olg, LLOG_CONFIG_ORIG_CTXT);
+        if (ctxt) {
+                rc2 = llog_cleanup(ctxt);
+                if (!rc)
+                        rc = rc2;
+        }
 
         RETURN(rc);
 }
 
-static int 
+static int
 filter_olg_init(struct obd_device *obd, struct obd_llog_group *olg,
                 struct obd_device *tgt)
 {
@@ -2221,7 +2294,7 @@ cleanup:
 /**
  * Init the default olg, which is embeded in the obd_device, for filter.
  */
-static int 
+static int
 filter_default_olg_init(struct obd_device *obd, struct obd_llog_group *olg,
                         struct obd_device *tgt)
 {
@@ -2243,9 +2316,14 @@ filter_default_olg_init(struct obd_device *obd, struct obd_llog_group *olg,
         if (rc)
                 GOTO(cleanup_lcm, rc);
 
+        rc = llog_setup(obd, olg, LLOG_CONFIG_ORIG_CTXT, tgt, 0, NULL,
+                        &llog_lvfs_ops);
+        if (rc)
+                GOTO(cleanup_olg, rc);
+
         ctxt = llog_group_get_ctxt(olg, LLOG_MDS_OST_REPL_CTXT);
         if (!ctxt) {
-                CERROR("Can't get ctxt for %p:%x\n", olg, 
+                CERROR("Can't get ctxt for %p:%x\n", olg,
                        LLOG_MDS_OST_REPL_CTXT);
                 GOTO(cleanup_olg, rc = -ENODEV);
         }
@@ -2261,8 +2339,8 @@ cleanup_lcm:
         filter->fo_lcm = NULL;
         return rc;
 }
-                     
-static int 
+
+static int
 filter_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
                  struct obd_device *tgt, int count, struct llog_catid *catid,
                  struct obd_uuid *uuid)
@@ -2282,7 +2360,7 @@ filter_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
                 RETURN(rc);
         ctxt = llog_group_get_ctxt(olg, LLOG_MDS_OST_REPL_CTXT);
         if (!ctxt) {
-                CERROR("Can't get ctxt for %p:%x\n", olg, 
+                CERROR("Can't get ctxt for %p:%x\n", olg,
                        LLOG_MDS_OST_REPL_CTXT);
                 filter_olg_fini(olg);
                 RETURN(-ENODEV);
@@ -2298,21 +2376,29 @@ static int filter_llog_finish(struct obd_device *obd, int count)
         struct filter_obd *filter = &obd->u.filter;
         struct llog_ctxt *ctxt;
         ENTRY;
-        
+
         ctxt = llog_group_get_ctxt(&obd->obd_olg, LLOG_MDS_OST_REPL_CTXT);
-        LASSERT(ctxt != NULL);
-        mutex_down(&ctxt->loc_sem);
-        if (ctxt->loc_imp) {
+        if (ctxt) {
+                /*
+                 * Make sure that no cached llcds left in recov_thread.
+                 * We actually do sync in disconnect time, but disconnect
+                 * may not come being marked rq_no_resend = 1.
+                 */
+                llog_sync(ctxt, NULL);
+
                 /*
-                 * Balance class_import_get() in llog_receptor_accept(). This
-                 * is safe to do here, as llog is already synchronized and its
-                 * import may go.
+                 * Balance class_import_get() in llog_receptor_accept().
+                 * This is safe to do, as llog is already synchronized
+                 * and its import may go.
                  */
-                class_import_put(ctxt->loc_imp);
-                ctxt->loc_imp = NULL;
+                mutex_down(&ctxt->loc_sem);
+                if (ctxt->loc_imp) {
+                        class_import_put(ctxt->loc_imp);
+                        ctxt->loc_imp = NULL;
+                }
+                mutex_up(&ctxt->loc_sem);
+                llog_ctxt_put(ctxt);
         }
-        mutex_up(&ctxt->loc_sem);
-        llog_ctxt_put(ctxt);
 
         if (filter->fo_lcm) {
                 llog_recov_thread_fini(filter->fo_lcm, obd->obd_force);
@@ -2347,18 +2433,18 @@ struct obd_llog_group *filter_find_olg(struct obd_device *obd, int group)
 
         filter = &obd->u.filter;
 
-        if (group == OBD_LLOG_GROUP)
+        if (group == FILTER_GROUP_LLOG)
                 RETURN(&obd->obd_olg);
 
         spin_lock(&filter->fo_llog_list_lock);
         olg = filter_find_olg_internal(filter, group);
         spin_unlock(&filter->fo_llog_list_lock);
 
-        RETURN(olg); 
+        RETURN(olg);
 }
 /**
  * Find the llog_group of the filter according to the group. If it can not
- * find, create the llog_group, which only happens when mds is being synced 
+ * find, create the llog_group, which only happens when mds is being synced
  * with OST.
  */
 struct obd_llog_group *filter_find_create_olg(struct obd_device *obd, int group)
@@ -2369,7 +2455,7 @@ struct obd_llog_group *filter_find_create_olg(struct obd_device *obd, int group)
 
         filter = &obd->u.filter;
 
-        if (group == OBD_LLOG_GROUP)
+        if (group == FILTER_GROUP_LLOG)
                 RETURN(&obd->obd_olg);
 
         spin_lock(&filter->fo_llog_list_lock);
@@ -2420,15 +2506,14 @@ static int filter_llog_connect(struct obd_export *exp,
         int rc;
         ENTRY;
 
-        CDEBUG(D_OTHER, "handle connect for %s: %u/%u/%u\n", obd->obd_name,
-                (unsigned) body->lgdc_logid.lgl_ogr,
-                (unsigned) body->lgdc_logid.lgl_oid,
-                (unsigned) body->lgdc_logid.lgl_ogen);
+        CDEBUG(D_OTHER, "%s: LLog connect for: "LPX64"/"LPX64":%x\n",
+               obd->obd_name, body->lgdc_logid.lgl_oid,
+               body->lgdc_logid.lgl_ogr, body->lgdc_logid.lgl_ogen);
 
         olg = filter_find_olg(obd, body->lgdc_logid.lgl_ogr);
         if (!olg) {
                 CERROR(" %s: can not find olg of group %d\n",
-                       obd->obd_name, (int)body->lgdc_logid.lgl_ogr); 
+                       obd->obd_name, (int)body->lgdc_logid.lgl_ogr);
                 RETURN(-ENOENT);
         }
         llog_group_set_export(olg, exp);
@@ -2436,7 +2521,12 @@ static int filter_llog_connect(struct obd_export *exp,
         ctxt = llog_group_get_ctxt(olg, body->lgdc_ctxt_idx);
         LASSERTF(ctxt != NULL, "ctxt is not null, ctxt idx %d \n",
                  body->lgdc_ctxt_idx);
-        rc = llog_connect(ctxt, 1, &body->lgdc_logid,
+
+        CWARN("%s: Recovery from log "LPX64"/"LPX64":%x\n",
+              obd->obd_name, body->lgdc_logid.lgl_oid,
+              body->lgdc_logid.lgl_ogr, body->lgdc_logid.lgl_ogen);
+
+        rc = llog_connect(ctxt, &body->lgdc_logid,
                           &body->lgdc_gen, NULL);
         llog_ctxt_put(ctxt);
         if (rc != 0)
@@ -2469,8 +2559,8 @@ static int filter_llog_preclean(struct obd_device *obd)
                 list_add(&olg->olg_list, &remove_list);
         }
         spin_unlock(&filter->fo_llog_list_lock);
-        
-        list_for_each_entry_safe(olg, tmp, &remove_list, olg_list) {  
+
+        list_for_each_entry_safe(olg, tmp, &remove_list, olg_list) {
                 list_del_init(&olg->olg_list);
                 rc = filter_olg_fini(olg);
                 if (rc)
@@ -2580,7 +2670,13 @@ static int filter_connect_internal(struct obd_export *exp,
         exp->exp_connect_flags = data->ocd_connect_flags;
         data->ocd_version = LUSTRE_VERSION_CODE;
 
+        /* Kindly make sure the SKIP_ORPHAN flag is from MDS. */
+        if (!ergo(data->ocd_connect_flags & OBD_CONNECT_SKIP_ORPHAN,
+                  data->ocd_connect_flags & OBD_CONNECT_MDS))
+                RETURN(-EPROTO);
+
         if (exp->exp_connect_flags & OBD_CONNECT_GRANT) {
+                struct filter_obd *filter = &exp->exp_obd->u.filter;
                 obd_size left, want;
 
                 spin_lock(&exp->exp_obd->obd_osfs_lock);
@@ -2594,6 +2690,8 @@ static int filter_connect_internal(struct obd_export *exp,
                        LPU64" left: "LPU64"\n", exp->exp_obd->obd_name,
                        exp->exp_client_uuid.uuid, exp,
                        data->ocd_grant, want, left);
+                
+                filter->fo_tot_granted_clients ++;
         }
 
         if (data->ocd_connect_flags & OBD_CONNECT_INDEX) {
@@ -2662,7 +2760,8 @@ static int filter_connect_internal(struct obd_export *exp,
 static int filter_reconnect(const struct lu_env *env,
                             struct obd_export *exp, struct obd_device *obd,
                             struct obd_uuid *cluuid,
-                            struct obd_connect_data *data)
+                            struct obd_connect_data *data,
+                            void *localdata)
 {
         int rc;
         ENTRY;
@@ -2671,40 +2770,43 @@ static int filter_reconnect(const struct lu_env *env,
                 RETURN(-EINVAL);
 
         rc = filter_connect_internal(exp, data);
+        if (rc == 0)
+                filter_export_stats_init(obd, exp, localdata);
 
         RETURN(rc);
 }
 
 /* nearly identical to mds_connect */
 static int filter_connect(const struct lu_env *env,
-                          struct lustre_handle *conn, struct obd_device *obd,
+                          struct obd_export **exp, struct obd_device *obd,
                           struct obd_uuid *cluuid,
                           struct obd_connect_data *data, void *localdata)
 {
         struct lvfs_run_ctxt saved;
-        struct obd_export *exp;
+        struct lustre_handle conn = { 0 };
+        struct obd_export *lexp;
         struct filter_export_data *fed;
         struct lsd_client_data *lcd = NULL;
         __u32 group;
         int rc;
         ENTRY;
 
-        if (conn == NULL || obd == NULL || cluuid == NULL)
+        if (exp == NULL || obd == NULL || cluuid == NULL)
                 RETURN(-EINVAL);
 
-        rc = class_connect(conn, obd, cluuid);
+        rc = class_connect(&conn, obd, cluuid);
         if (rc)
                 RETURN(rc);
-        exp = class_conn2export(conn);
-        LASSERT(exp != NULL);
+        lexp = class_conn2export(&conn);
+        LASSERT(lexp != NULL);
 
-        fed = &exp->exp_filter_data;
+        fed = &lexp->exp_filter_data;
 
-        rc = filter_connect_internal(exp, data);
+        rc = filter_connect_internal(lexp, data);
         if (rc)
                 GOTO(cleanup, rc);
 
-        filter_export_stats_init(obd, exp, localdata);
+        filter_export_stats_init(obd, lexp, localdata);
         if (obd->obd_replayable) {
                 OBD_ALLOC(lcd, sizeof(*lcd));
                 if (!lcd) {
@@ -2714,17 +2816,15 @@ static int filter_connect(const struct lu_env *env,
 
                 memcpy(lcd->lcd_uuid, cluuid, sizeof(lcd->lcd_uuid));
                 fed->fed_lcd = lcd;
-                rc = filter_client_add(obd, exp, -1);
+                rc = filter_client_add(obd, lexp, -1);
                 if (rc)
                         GOTO(cleanup, rc);
         }
 
         group = data->ocd_group;
-        if (group == 0)
-                GOTO(cleanup, rc);
 
         CWARN("%s: Received MDS connection ("LPX64"); group %d\n",
-              obd->obd_name, exp->exp_handle.h_cookie, group);
+              obd->obd_name, lexp->exp_handle.h_cookie, group);
 
         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
         rc = filter_read_groups(obd, group, 1);
@@ -2742,9 +2842,10 @@ cleanup:
                         OBD_FREE_PTR(lcd);
                         fed->fed_lcd = NULL;
                 }
-                class_disconnect(exp);
+                class_disconnect(lexp);
+                *exp = NULL;
         } else {
-                class_export_put(exp);
+                *exp = lexp;
         }
 
         RETURN(rc);
@@ -2871,11 +2972,10 @@ static int filter_destroy_export(struct obd_export *exp)
                        exp->exp_obd->obd_name, exp->exp_client_uuid.uuid,
                        exp, exp->exp_filter_data.fed_pending);
 
-        /* Not ported yet the b1_6 quota functionality
-         * lquota_clearinfo(filter_quota_interface_ref, exp, exp->exp_obd);
-         */
+        lquota_clearinfo(filter_quota_interface_ref, exp, exp->exp_obd);
 
         target_destroy_export(exp);
+        ldlm_destroy_export(exp);
 
         if (obd_uuid_equals(&exp->exp_client_uuid, &exp->exp_obd->obd_uuid))
                 RETURN(0);
@@ -2889,6 +2989,12 @@ static int filter_destroy_export(struct obd_export *exp)
         filter_grant_discard(exp);
         filter_fmd_cleanup(exp);
 
+        if (exp->exp_connect_flags & OBD_CONNECT_GRANT_SHRINK) {
+                struct filter_obd *filter = &exp->exp_obd->u.filter;
+                if (filter->fo_tot_granted_clients > 0)
+                        filter->fo_tot_granted_clients --;
+        }
+
         if (!(exp->exp_flags & OBD_OPT_FORCE))
                 filter_grant_sanity_check(exp->exp_obd, __FUNCTION__);
 
@@ -2899,7 +3005,7 @@ static void filter_sync_llogs(struct obd_device *obd, struct obd_export *dexp)
 {
         struct obd_llog_group *olg_min, *olg;
         struct filter_obd *filter;
-        int worked = 0, group;
+        int worked = -1, group;
         struct llog_ctxt *ctxt;
         ENTRY;
 
@@ -2936,18 +3042,20 @@ static void filter_sync_llogs(struct obd_device *obd, struct obd_export *dexp)
                     (dexp == olg_min->olg_exp || dexp == NULL)) {
                         int err;
                         ctxt = llog_group_get_ctxt(olg_min,
-                                                LLOG_MDS_OST_REPL_CTXT);
-                        LASSERT(ctxt != NULL);
-                        err = llog_sync(ctxt, olg_min->olg_exp);
-                        llog_ctxt_put(ctxt);
-                        if (err)
-                                CERROR("error flushing logs to MDS: rc %d\n",
-                                       err);                        
+                                                   LLOG_MDS_OST_REPL_CTXT);
+                        if (ctxt) {
+                                err = llog_sync(ctxt, olg_min->olg_exp);
+                                llog_ctxt_put(ctxt);
+                                if (err) {
+                                        CERROR("error flushing logs to MDS: "
+                                               "rc %d\n", err);
+                                }
+                        }
                 }
         } while (olg_min != NULL);
 }
 
-/* also incredibly similar to mds_disconnect */
+/* Also incredibly similar to mds_disconnect */
 static int filter_disconnect(struct obd_export *exp)
 {
         struct obd_device *obd = exp->exp_obd;
@@ -2961,6 +3069,11 @@ static int filter_disconnect(struct obd_export *exp)
                 filter_grant_sanity_check(obd, __FUNCTION__);
         filter_grant_discard(exp);
 
+        /* Flush any remaining cancel messages out to the target */
+        filter_sync_llogs(obd, exp);
+
+        lquota_clearinfo(filter_quota_interface_ref, exp, exp->exp_obd);
+
         /* Disconnect early so that clients can't keep using export */
         rc = class_disconnect(exp);
         if (exp->exp_obd->obd_namespace != NULL)
@@ -2970,8 +3083,6 @@ static int filter_disconnect(struct obd_export *exp)
 
         lprocfs_exp_cleanup(exp);
 
-        /* flush any remaining cancel messages out to the target */
-        filter_sync_llogs(obd, exp);
         class_export_put(exp);
         RETURN(rc);
 }
@@ -3100,6 +3211,7 @@ int filter_setattr_internal(struct obd_export *exp, struct dentry *dentry,
         struct llog_cookie *fcc = NULL;
         struct filter_obd *filter;
         int rc, err, locked = 0, sync = 0;
+        loff_t old_size = 0;
         unsigned int ia_valid;
         struct inode *inode;
         struct iattr iattr;
@@ -3125,6 +3237,7 @@ int filter_setattr_internal(struct obd_export *exp, struct dentry *dentry,
         if (ia_valid & ATTR_SIZE || ia_valid & (ATTR_UID | ATTR_GID)) {
                 DQUOT_INIT(inode);
                 LOCK_INODE_MUTEX(inode);
+                old_size = i_size_read(inode);
                 locked = 1;
         }
 
@@ -3205,14 +3318,17 @@ int filter_setattr_internal(struct obd_export *exp, struct dentry *dentry,
                 fcc = NULL;
         }
 
+        /* For a partial-page truncate flush the page to disk immediately
+         * to avoid data corruption during direct disk write. b=17397 */
+        if (!sync && (iattr.ia_valid & ATTR_SIZE) &&
+            old_size != iattr.ia_size && (iattr.ia_size & ~CFS_PAGE_MASK)) {
+                err = filemap_fdatawrite_range(inode->i_mapping, iattr.ia_size,
+                                               iattr.ia_size + 1);
+                if (!rc)
+                        rc = err;
+        }
+
         if (locked) {
-                /* Let's flush truncated page on disk immediately, then we can
-                 * avoid need to search for page aliases before directio writes
-                 * and this sort of stuff at expense of somewhat slower
-                 * truncates not on a page boundary. I believe this is the only
-                 * place in filter code that can lead to pages getting to
-                 * pagecache so far. */
-                filter_clear_truncated_page(inode);
                 UNLOCK_INODE_MUTEX(inode);
                 locked = 0;
         }
@@ -3241,43 +3357,52 @@ out_unlock:
 int filter_setattr(struct obd_export *exp, struct obd_info *oinfo,
                    struct obd_trans_info *oti)
 {
+        struct obdo *oa = oinfo->oi_oa;
+        struct lustre_capa *capa = oinfo_capa(oinfo);
         struct ldlm_res_id res_id;
         struct filter_mod_data *fmd;
         struct lvfs_run_ctxt saved;
         struct filter_obd *filter;
         struct ldlm_resource *res;
         struct dentry *dentry;
+        __u64 opc = CAPA_OPC_META_WRITE;
         int rc;
         ENTRY;
 
-        osc_build_res_name(oinfo->oi_oa->o_id, oinfo->oi_oa->o_gr, &res_id);
-        rc = filter_auth_capa(exp, NULL, oinfo_mdsno(oinfo),
-                              oinfo_capa(oinfo), CAPA_OPC_META_WRITE);
+        if (oa->o_valid & OBD_FL_TRUNC)
+                opc |= CAPA_OPC_OSS_TRUNC;
+        rc = filter_auth_capa(exp, NULL, obdo_mdsno(oa), capa, opc);
         if (rc)
                 RETURN(rc);
 
+        if (oa->o_valid & (OBD_MD_FLUID | OBD_MD_FLGID)) {
+                rc = filter_capa_fixoa(exp, oa, obdo_mdsno(oa), capa);
+                if (rc)
+                        RETURN(rc);
+        }
+
+        osc_build_res_name(oa->o_id, oa->o_gr, &res_id);
         /* This would be very bad - accidentally truncating a file when
          * changing the time or similar - bug 12203. */
-        if (oinfo->oi_oa->o_valid & OBD_MD_FLSIZE && 
+        if (oa->o_valid & OBD_MD_FLSIZE &&
             oinfo->oi_policy.l_extent.end != OBD_OBJECT_EOF) {
                 static char mdsinum[48];
 
-                if (oinfo->oi_oa->o_valid & OBD_MD_FLFID)
+                if (oa->o_valid & OBD_MD_FLFID)
                         snprintf(mdsinum, sizeof(mdsinum) - 1,
-                                 " of inode "LPU64"/%u", oinfo->oi_oa->o_fid,
-                                 oinfo->oi_oa->o_generation);
+                                 " of inode "LPU64"/%u", oa->o_fid,
+                                 oa->o_generation);
                 else
                         mdsinum[0] = '\0';
 
                 CERROR("%s: setattr from %s trying to truncate objid "LPU64
                        " %s\n",
                        exp->exp_obd->obd_name, obd_export_nid2str(exp),
-                       oinfo->oi_oa->o_id, mdsinum);
+                       oa->o_id, mdsinum);
                 RETURN(-EPERM);
         }
 
-        dentry = __filter_oa2dentry(exp->exp_obd, oinfo->oi_oa,
-                                    __FUNCTION__, 1);
+        dentry = __filter_oa2dentry(exp->exp_obd, oa, __FUNCTION__, 1);
         if (IS_ERR(dentry))
                 RETURN(PTR_ERR(dentry));
 
@@ -3285,16 +3410,16 @@ int filter_setattr(struct obd_export *exp, struct obd_info *oinfo,
         push_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, NULL);
         lock_kernel();
 
-        if (oinfo->oi_oa->o_valid &
+        if (oa->o_valid &
             (OBD_MD_FLMTIME | OBD_MD_FLATIME | OBD_MD_FLCTIME)) {
-                fmd = filter_fmd_get(exp,oinfo->oi_oa->o_id,oinfo->oi_oa->o_gr);
+                fmd = filter_fmd_get(exp, oa->o_id, oa->o_gr);
                 if (fmd && fmd->fmd_mactime_xid < oti->oti_xid)
                         fmd->fmd_mactime_xid = oti->oti_xid;
                 filter_fmd_put(exp, fmd);
         }
 
         /* setting objects attributes (including owner/group) */
-        rc = filter_setattr_internal(exp, dentry, oinfo->oi_oa, oti);
+        rc = filter_setattr_internal(exp, dentry, oa, oti);
         if (rc)
                 GOTO(out_unlock, rc);
 
@@ -3302,14 +3427,16 @@ int filter_setattr(struct obd_export *exp, struct obd_info *oinfo,
                                 &res_id, LDLM_EXTENT, 0);
 
         if (res != NULL) {
+                LDLM_RESOURCE_ADDREF(res);
                 rc = ldlm_res_lvbo_update(res, NULL, 0, 0);
+                LDLM_RESOURCE_DELREF(res);
                 ldlm_resource_putref(res);
         }
 
-        oinfo->oi_oa->o_valid = OBD_MD_FLID;
+        oa->o_valid = OBD_MD_FLID;
 
         /* Quota release need uid/gid info */
-        obdo_from_inode(oinfo->oi_oa, dentry->d_inode,
+        obdo_from_inode(oa, dentry->d_inode,
                         FILTER_VALID_FLAGS | OBD_MD_FLUID | OBD_MD_FLGID);
 
         EXIT;
@@ -3378,15 +3505,16 @@ static int filter_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
 
 /* caller must hold fo_create_locks[oa->o_gr] */
 static int filter_destroy_precreated(struct obd_export *exp, struct obdo *oa,
-                                      struct filter_obd *filter)
+                                     struct filter_obd *filter)
 {
         struct obdo doa; /* XXX obdo on stack */
         obd_id last, id;
-        int rc;
+        int rc = 0;
+        int skip_orphan;
         ENTRY;
 
         LASSERT(oa);
-        LASSERT(oa->o_gr != 0);
+        LASSERT_MDS_GROUP(oa->o_gr);
         LASSERT(oa->o_valid & OBD_MD_FLGROUP);
         LASSERT(down_trylock(&filter->fo_create_locks[oa->o_gr]) != 0);
 
@@ -3404,26 +3532,38 @@ static int filter_destroy_precreated(struct obd_export *exp, struct obdo *oa,
 
         last = filter_last_id(filter, doa.o_gr);
 
-        CWARN("%s: deleting orphan objects from "LPU64" to "LPU64"\n",
-               exp->exp_obd->obd_name, oa->o_id + 1, last);
-               
+        skip_orphan = !!(exp->exp_connect_flags & OBD_CONNECT_SKIP_ORPHAN);
+
+        CWARN("%s: deleting orphan objects from "LPU64" to "LPU64"%s\n",
+               exp->exp_obd->obd_name, oa->o_id + 1, last,
+               skip_orphan ? ", orphan objids won't be reused any more." : ".");
+
         for (id = last; id > oa->o_id; id--) {
                 doa.o_id = id;
-                rc = filter_destroy(exp, &doa, NULL, NULL, NULL);
+                rc = filter_destroy(exp, &doa, NULL, NULL, NULL, NULL);
                 if (rc && rc != -ENOENT) /* this is pretty fatal... */
                         CEMERG("error destroying precreate objid "LPU64": %d\n",
                                id, rc);
-                filter_set_last_id(filter, id - 1, doa.o_gr);
+
                 /* update last_id on disk periodically so that if we restart
                  * we don't need to re-scan all of the just-deleted objects. */
-                if ((id & 511) == 0)
+                if ((id & 511) == 0 && !skip_orphan) {
+                        filter_set_last_id(filter, id - 1, doa.o_gr);
                         filter_update_last_objid(exp->exp_obd, doa.o_gr, 0);
+                }
         }
 
         CDEBUG(D_HA, "%s: after destroy: set last_objids["LPU64"] = "LPU64"\n",
                exp->exp_obd->obd_name, doa.o_gr, oa->o_id);
 
-        rc = filter_update_last_objid(exp->exp_obd, doa.o_gr, 1);
+        if (!skip_orphan) {
+                filter_set_last_id(filter, id, doa.o_gr);
+                rc = filter_update_last_objid(exp->exp_obd, doa.o_gr, 1);
+        } else {
+                /* don't reuse orphan object, return last used objid */
+                oa->o_id = last;
+                rc = 0;
+        }
         clear_bit(doa.o_gr, &filter->fo_destroys_in_progress);
 
         RETURN(rc);
@@ -3442,6 +3582,8 @@ static int filter_handle_precreate(struct obd_export *exp, struct obdo *oa,
 
         /* delete orphans request */
         if ((oa->o_valid & OBD_MD_FLFLAGS) && (oa->o_flags & OBD_FL_DELORPHAN)){
+                obd_id last = filter_last_id(filter, group);
+
                 if (oti->oti_conn_cnt < exp->exp_conn_cnt) {
                         CERROR("%s: dropping old orphan cleanup request\n",
                                obd->obd_name);
@@ -3456,14 +3598,14 @@ static int filter_handle_precreate(struct obd_export *exp, struct obdo *oa,
                         up(&filter->fo_create_locks[group]);
                         RETURN(0);
                 }
-                diff = oa->o_id - filter_last_id(filter, group);
+                diff = oa->o_id - last;
                 CDEBUG(D_HA, "filter_last_id() = "LPU64" -> diff = %d\n",
-                       filter_last_id(filter, group), diff);
+                       last, diff);
 
                 if (-diff > OST_MAX_PRECREATE) {
                         CERROR("%s: ignoring bogus orphan destroy request: "
                                "obdid "LPU64" last_id "LPU64"\n", obd->obd_name,
-                               oa->o_id, filter_last_id(filter, group));
+                               oa->o_id, last);
                         /* FIXME: should reset precreate_next_id on MDS */
                         GOTO(out, rc = -EINVAL);
                 }
@@ -3485,7 +3627,7 @@ static int filter_handle_precreate(struct obd_export *exp, struct obdo *oa,
                         GOTO(out, rc = 0);
                 }
                 /* only precreate if group == 0 and o_id is specfied */
-                if (group < FILTER_GROUP_MDS0 || oa->o_id == 0)
+                if (group == FILTER_GROUP_LLOG || oa->o_id == 0)
                         diff = 1;
                 else
                         diff = oa->o_id - filter_last_id(filter, group);
@@ -3633,7 +3775,7 @@ static int filter_precreate(struct obd_device *obd, struct obdo *oa,
                         rc = -EAGAIN;
                         break;
                 }
-                
+
                 if (recreate_obj) {
                         __u64 last_id;
                         next_id = oa->o_id;
@@ -3647,8 +3789,6 @@ static int filter_precreate(struct obd_device *obd, struct obdo *oa,
                 } else
                         next_id = filter_last_id(filter, group) + 1;
 
-                CDEBUG(D_INFO, "precreate objid "LPU64"\n", next_id);
-
                 dparent = filter_parent_lock(obd, group, next_id);
                 if (IS_ERR(dparent))
                         GOTO(cleanup, rc = PTR_ERR(dparent));
@@ -3694,6 +3834,10 @@ static int filter_precreate(struct obd_device *obd, struct obdo *oa,
                         GOTO(cleanup, rc = PTR_ERR(handle));
                 cleanup_phase = 3;
 
+                CDEBUG(D_INODE, "%s: filter_precreate(od->o_gr="LPU64
+                       ",od->o_id="LPU64")\n", obd->obd_name, group,
+                       next_id);
+
                 /* We mark object SUID+SGID to flag it for accepting UID+GID
                  * from client on first write.  Currently the permission bits
                  * on the OST are never used, so this is OK. */
@@ -3751,21 +3895,23 @@ set_last_id:
 static int filter_create(struct obd_export *exp, struct obdo *oa,
                          struct lov_stripe_md **ea, struct obd_trans_info *oti)
 {
+        struct obd_device *obd = exp->exp_obd;
         struct filter_export_data *fed;
-        struct obd_device *obd = NULL;
         struct filter_obd *filter;
         struct lvfs_run_ctxt saved;
         struct lov_stripe_md *lsm = NULL;
         int rc = 0, diff, group = oa->o_gr;
         ENTRY;
 
-        if (!(oa->o_valid & OBD_MD_FLGROUP) || group == 0) {
+        CDEBUG(D_INODE, "%s: filter_create(od->o_gr="LPU64",od->o_id="
+               LPU64")\n", obd->obd_name, oa->o_gr, oa->o_id);
+
+        if (!(oa->o_valid & OBD_MD_FLGROUP)) {
                 CERROR("!!! nid %s sent invalid object group %d\n",
                         obd_export_nid2str(exp), group);
                 RETURN(-EINVAL);
         }
 
-        obd = exp->exp_obd;
         fed = &exp->exp_filter_data;
         filter = &obd->u.filter;
 
@@ -3778,8 +3924,6 @@ static int filter_create(struct obd_export *exp, struct obdo *oa,
                 RETURN(-ENOTUNIQ);
         }
 
-        CDEBUG(D_INFO, "filter_create(od->o_gr="LPU64",od->o_id="LPU64")\n",
-               oa->o_gr, oa->o_id);
         if (ea != NULL) {
                 lsm = *ea;
                 if (lsm == NULL) {
@@ -3826,7 +3970,7 @@ static int filter_create(struct obd_export *exp, struct obdo *oa,
 
 int filter_destroy(struct obd_export *exp, struct obdo *oa,
                    struct lov_stripe_md *md, struct obd_trans_info *oti,
-                   struct obd_export *md_exp)
+                   struct obd_export *md_exp, void *capa)
 {
         unsigned int qcids[MAXQUOTAS] = {0, 0};
         struct obd_device *obd;
@@ -3841,12 +3985,20 @@ int filter_destroy(struct obd_export *exp, struct obdo *oa,
 
         LASSERT(oa->o_valid & OBD_MD_FLGROUP);
 
+        rc = filter_auth_capa(exp, NULL, obdo_mdsno(oa),
+                              (struct lustre_capa *)capa, CAPA_OPC_OSS_DESTROY);
+        if (rc)
+                RETURN(rc);
+
         obd = exp->exp_obd;
         filter = &obd->u.filter;
 
         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
         cleanup_phase = 1;
 
+        CDEBUG(D_INODE, "%s: filter_destroy(od->o_gr="LPU64",od->o_id="
+               LPU64")\n", obd->obd_name, oa->o_gr, oa->o_id);
+
         dchild = filter_fid2dentry(obd, NULL, oa->o_gr, oa->o_id);
         if (IS_ERR(dchild))
                 GOTO(cleanup, rc = PTR_ERR(dchild));
@@ -3946,13 +4098,13 @@ cleanup:
                                                      filter_cancel_cookies_cb,
                                                      fcc);
                 /* If add_journal_cb failed, then filter_finish_transno
-                 * will commit the handle and we will do a sync 
-                 * on commit. then we call callback directly to free 
-                 * the fcc. 
+                 * will commit the handle and we will do a sync
+                 * on commit. then we call callback directly to free
+                 * the fcc.
                  */
                 rc = filter_finish_transno(exp, oti, rc, sync);
                 if (sync) {
-                        filter_cancel_cookies_cb(obd, 0, fcc, rc); 
+                        filter_cancel_cookies_cb(obd, 0, fcc, rc);
                         fcc = NULL;
                 }
                 rc2 = fsfilt_commit(obd, dparent->d_inode, handle, 0);
@@ -3982,9 +4134,8 @@ cleanup:
         qcids[GRPQUOTA] = oa->o_gid;
         rc2 = lquota_adjust(filter_quota_interface_ref, obd, qcids, NULL, rc,
                             FSFILT_OP_UNLINK);
-
         if (rc2)
-                CDEBUG(D_QUOTA, "filter adjust qunit! (rc:%d)\n", rc2);
+                CERROR("filter adjust qunit! (rc:%d)\n", rc2);
         return rc;
 }
 
@@ -4006,13 +4157,10 @@ static int filter_truncate(struct obd_export *exp, struct obd_info *oinfo,
                ", o_size = "LPD64"\n", oinfo->oi_oa->o_id,
                oinfo->oi_oa->o_valid, oinfo->oi_policy.l_extent.start);
 
-        rc = filter_auth_capa(exp, NULL, oinfo_mdsno(oinfo),
-                              oinfo_capa(oinfo), CAPA_OPC_OSS_TRUNC);
-        if (rc)
-                RETURN(rc);
-
         oinfo->oi_oa->o_size = oinfo->oi_policy.l_extent.start;
+        oinfo->oi_oa->o_valid |= OBD_FL_TRUNC;
         rc = filter_setattr(exp, oinfo, oti);
+        oinfo->oi_oa->o_valid &= ~OBD_FL_TRUNC;
         RETURN(rc);
 }
 
@@ -4033,10 +4181,10 @@ static int filter_sync(struct obd_export *exp, struct obdo *oa,
 
         filter = &exp->exp_obd->u.filter;
 
-        /* an objid of zero is taken to mean "sync whole filesystem" */
+        /* An objid of zero is taken to mean "sync whole filesystem" */
         if (!oa || !(oa->o_valid & OBD_MD_FLID)) {
                 rc = fsfilt_sync(exp->exp_obd, filter->fo_obt.obt_sb);
-                /* flush any remaining cancel messages out to the target */
+                /* Flush any remaining cancel messages out to the target */
                 filter_sync_llogs(exp->exp_obd, exp);
                 RETURN(rc);
         }
@@ -4142,27 +4290,42 @@ static int filter_get_info(struct obd_export *exp, __u32 keylen,
                 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
                 rc = fsfilt_iocontrol(obd, dentry->d_inode, NULL,
                                       EXT3_IOC_FIEMAP, (long)fiemap);
-                if (rc) {
-                        f_dput(dentry);
-                        RETURN(rc);
-                }
                 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 
                 f_dput(dentry);
-                RETURN(0);
+                RETURN(rc);
         }
 
         CDEBUG(D_IOCTL, "invalid key\n");
         RETURN(-EINVAL);
 }
 
+static inline int filter_setup_llog_group(struct obd_export *exp,
+                                          struct obd_device *obd,
+                                           int group)
+{
+        struct obd_llog_group *olg;
+        struct llog_ctxt *ctxt;
+        int rc;
+
+        olg = filter_find_create_olg(obd, group);
+        if (IS_ERR(olg))
+                RETURN(PTR_ERR(olg));
+
+        llog_group_set_export(olg, exp);
+
+        ctxt = llog_group_get_ctxt(olg, LLOG_MDS_OST_REPL_CTXT);
+        LASSERTF(ctxt != NULL, "ctxt is null\n");
+
+        rc = llog_receptor_accept(ctxt, exp->exp_imp_reverse);
+        llog_ctxt_put(ctxt);
+        return rc;
+}
 static int filter_set_info_async(struct obd_export *exp, __u32 keylen,
                                  void *key, __u32 vallen, void *val,
                                  struct ptlrpc_request_set *set)
 {
         struct obd_device *obd;
-        struct obd_llog_group *olg;
-        struct llog_ctxt *ctxt;
         int rc = 0, group;
         ENTRY;
 
@@ -4181,9 +4344,24 @@ static int filter_set_info_async(struct obd_export *exp, __u32 keylen,
 
         if (KEY_IS(KEY_REVIMP_UPD)) {
                 filter_revimp_update(exp);
+                lquota_clearinfo(filter_quota_interface_ref, exp, exp->exp_obd);
+                RETURN(0);
+        }
+
+        if (KEY_IS(KEY_SPTLRPC_CONF)) {
+                filter_adapt_sptlrpc_conf(obd, 0);
                 RETURN(0);
         }
 
+        if (KEY_IS(KEY_GRANT_SHRINK)) {
+                struct ost_body *body = (struct ost_body *)val;
+                /* handle shrink grant */
+                spin_lock(&exp->exp_obd->obd_osfs_lock);
+                filter_grant_incoming(exp, &body->oa);
+                spin_unlock(&exp->exp_obd->obd_osfs_lock);
+                RETURN(rc);
+        }
+
         if (!KEY_IS(KEY_MDS_CONN))
                 RETURN(-EINVAL);
 
@@ -4192,24 +4370,23 @@ static int filter_set_info_async(struct obd_export *exp, __u32 keylen,
         obd->u.filter.fo_mdc_conn.cookie = exp->exp_handle.h_cookie;
 
         /* setup llog imports */
-        LASSERT(val != NULL);
-        group = (int)(*(__u32 *)val);
-        LASSERT(group >= FILTER_GROUP_MDS0);
-
-        olg = filter_find_create_olg(obd, group);
-        if (IS_ERR(olg))
-                RETURN(PTR_ERR(olg));
-
-        llog_group_set_export(olg, exp);
-        
-        ctxt = llog_group_get_ctxt(olg, LLOG_MDS_OST_REPL_CTXT);
-        LASSERTF(ctxt != NULL, "ctxt is null\n"),
+        if (val != NULL)
+                group = (int)(*(__u32 *)val);
+        else
+                group = 0; /* default value */
 
-        rc = llog_receptor_accept(ctxt, exp->exp_imp_reverse);
-        llog_ctxt_put(ctxt);
+        LASSERT_MDS_GROUP(group);
+        rc = filter_setup_llog_group(exp, obd, group);
+        if (rc)
+                goto out;
 
-        lquota_setinfo(filter_quota_interface_ref, exp, obd);
+        lquota_setinfo(filter_quota_interface_ref, obd, exp);
 
+        if (group == FILTER_GROUP_MDS0) {
+                /* setup llog group 1 for interop */
+                filter_setup_llog_group(exp, obd, FILTER_GROUP_LLOG);
+        }
+out:
         RETURN(rc);
 }
 
@@ -4316,39 +4493,13 @@ static int filter_process_config(struct obd_device *obd, obd_count len,
         int rc = 0;
 
         switch (lcfg->lcfg_command) {
-        case LCFG_SPTLRPC_CONF: {
-                struct filter_obd       *filter = &obd->u.filter;
-                struct sptlrpc_conf_log *log;
-                struct sptlrpc_rule_set  tmp_rset;
-
-                log = sptlrpc_conf_log_extract(lcfg);
-                if (IS_ERR(log)) {
-                        rc = PTR_ERR(log);
-                        break;
-                }
-
-                sptlrpc_rule_set_init(&tmp_rset);
-
-                rc = sptlrpc_rule_set_from_log(&tmp_rset, log);
-                if (rc) {
-                        CERROR("obd %s: failed get sptlrpc rules: %d\n",
-                               obd->obd_name, rc);
-                        break;
-                }
-
-                write_lock(&filter->fo_sptlrpc_lock);
-                sptlrpc_rule_set_free(&filter->fo_sptlrpc_rset);
-                filter->fo_sptlrpc_rset = tmp_rset;
-                write_unlock(&filter->fo_sptlrpc_lock);
-
-                sptlrpc_target_update_exp_flavor(obd, &tmp_rset);
-                break;
-        }
         default:
                 lprocfs_filter_init_vars(&lvars);
 
                 rc = class_process_proc_param(PARAM_OST, lvars.obd_vars,
                                               lcfg, obd);
+                if (rc > 0)
+                        rc = 0;
                 break;
         }