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[fs/lustre-release.git] / lustre / obdfilter / filter.c
index c9ce969..fdccecc 100644 (file)
@@ -1,26 +1,42 @@
 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
  * vim:expandtab:shiftwidth=8:tabstop=8:
  *
- *  linux/fs/obdfilter/filter.c
+ * GPL HEADER START
  *
- *  Copyright (c) 2001-2003 Cluster File Systems, Inc.
- *   Author: Peter Braam <braam@clusterfs.com>
- *   Author: Andreas Dilger <adilger@clusterfs.com>
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
- *   This file is part of Lustre, http://www.lustre.org.
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
  *
- *   Lustre is free software; you can redistribute it and/or
- *   modify it under the terms of version 2 of the GNU General Public
- *   License as published by the Free Software Foundation.
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
  *
- *   Lustre is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY; without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *   GNU General Public License for more details.
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  *
- *   You should have received a copy of the GNU General Public License
- *   along with Lustre; if not, write to the Free Software
- *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright  2008 Sun Microsystems, Inc. All rights reserved
+ * Use is subject to license terms.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/obdfilter/filter.c
+ *
+ * Author: Peter Braam <braam@clusterfs.com>
+ * Author: Andreas Dilger <adilger@clusterfs.com>
  */
 
 /*
 #include <lustre_fsfilt.h>
 #include <lprocfs_status.h>
 #include <lustre_log.h>
-#include <lustre_commit_confd.h>
 #include <libcfs/list.h>
 #include <lustre_disk.h>
 #include <lustre_quota.h>
 #include <linux/slab.h>
 #include <lustre_param.h>
+#include <lustre/ll_fiemap.h>
 
 #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;
 
@@ -80,7 +96,7 @@ int filter_finish_transno(struct obd_export *exp, struct obd_trans_info *oti,
 {
         struct filter_obd *filter = &exp->exp_obd->u.filter;
         struct filter_export_data *fed = &exp->exp_filter_data;
-        struct filter_client_data *fcd = fed->fed_fcd;
+        struct lsd_client_data *lcd = fed->fed_lcd;
         __u64 last_rcvd;
         loff_t off;
         int err, log_pri = D_RPCTRACE;
@@ -107,10 +123,10 @@ int filter_finish_transno(struct obd_export *exp, struct obd_trans_info *oti,
                                 cpu_to_le64(last_rcvd);
                 spin_unlock(&filter->fo_translock);
         }
-        fcd->fcd_last_rcvd = cpu_to_le64(last_rcvd);
+        lcd->lcd_last_transno = cpu_to_le64(last_rcvd);
 
         /* could get xid from oti, if it's ever needed */
-        fcd->fcd_last_xid = 0;
+        lcd->lcd_last_xid = 0;
 
         off = fed->fed_lr_off;
         if (off <= 0) {
@@ -119,14 +135,14 @@ 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,
                                                            NULL);
 
                 err = fsfilt_write_record(exp->exp_obd, filter->fo_rcvd_filp,
-                                          fcd, sizeof(*fcd), &off,
+                                          lcd, sizeof(*lcd), &off,
                                           force_sync | exp->exp_need_sync);
                 if (force_sync)
                         filter_commit_cb(exp->exp_obd, last_rcvd, NULL, err);
@@ -138,7 +154,7 @@ int filter_finish_transno(struct obd_export *exp, struct obd_trans_info *oti,
         }
 
         CDEBUG(log_pri, "wrote trans "LPU64" for client %s at #%d: err = %d\n",
-               last_rcvd, fcd->fcd_uuid, fed->fed_lr_idx, err);
+               last_rcvd, lcd->lcd_uuid, fed->fed_lr_idx, err);
 
         RETURN(rc);
 }
@@ -160,46 +176,84 @@ static void init_brw_stats(struct brw_stats *brw_stats)
                 spin_lock_init(&brw_stats->hist[i].oh_lock);
 }
 
+static int lprocfs_init_rw_stats(struct obd_device *obd,
+                                 struct lprocfs_stats **stats)
+{
+        int num_stats;
+
+        num_stats = (sizeof(*obd->obd_type->typ_dt_ops) / sizeof(void *)) +
+                                                        LPROC_FILTER_LAST - 1;
+        *stats = lprocfs_alloc_stats(num_stats, 0);
+        if (*stats == NULL)
+                return -ENOMEM;
+
+        lprocfs_init_ops_stats(LPROC_FILTER_LAST, *stats);
+        lprocfs_counter_init(*stats, LPROC_FILTER_READ_BYTES,
+                             LPROCFS_CNTR_AVGMINMAX, "read_bytes", "bytes");
+        lprocfs_counter_init(*stats, LPROC_FILTER_WRITE_BYTES,
+                             LPROCFS_CNTR_AVGMINMAX, "write_bytes", "bytes");
+
+        return(0);
+}
+
 /* brw_stats are 2128, ops are 3916, ldlm are 204, so 6248 bytes per client,
    plus the procfs overhead :( */
 static int filter_export_stats_init(struct obd_device *obd,
-                                    struct obd_export *exp)
+                                    struct obd_export *exp,
+                                    void *client_nid)
 {
-        struct filter_export_data *fed = &exp->exp_filter_data;
-        struct proc_dir_entry *brw_entry;
-        int rc, num_stats;
+        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);
-        if (rc)
+        rc = lprocfs_exp_setup(exp, client_nid, &newnid);
+        if (rc) {
+                /* Mask error for already created
+                 * /proc entries */
+                if (rc == -EALREADY)
+                        rc = 0;
                 RETURN(rc);
+        }
 
-        /* Create a per export proc entry for brw_stats */
-        brw_entry = create_proc_entry("brw_stats", 0644, exp->exp_proc);
-        if (brw_entry == NULL)
-               RETURN(-ENOMEM);
-        brw_entry->proc_fops = &filter_per_export_stats_fops;
-        brw_entry->data = fed;
+        if (newnid) {
+                struct nid_stat *tmp = exp->exp_nid_stats;
+                LASSERT(tmp != NULL);
+
+                OBD_ALLOC(tmp->nid_brw_stats, sizeof(struct brw_stats));
+                if (tmp->nid_brw_stats == NULL)
+                        RETURN(-ENOMEM);
+
+                init_brw_stats(tmp->nid_brw_stats);
+                rc = lprocfs_seq_create(exp->exp_nid_stats->nid_proc, "brw_stats",
+                                        0644, &filter_per_nid_stats_fops,
+                                        exp->exp_nid_stats);
+                if (rc)
+                        CWARN("Error adding the brw_stats file\n");
+
+                rc = lprocfs_init_rw_stats(obd, &exp->exp_nid_stats->nid_stats);
+                if (rc)
+                        RETURN(rc);
+
+                rc = lprocfs_register_stats(tmp->nid_proc, "stats",
+                                            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);
+        }
 
-        /* Create a per export proc entry for ops stats */
-        num_stats = (sizeof(*obd->obd_type->typ_dt_ops) / sizeof(void *)) +
-                     LPROC_FILTER_LAST - 1;
-        exp->exp_ops_stats = lprocfs_alloc_stats(num_stats,
-                                                 LPROCFS_STATS_FLAG_NOPERCPU);
-        if (exp->exp_ops_stats == NULL)
-              RETURN(-ENOMEM);
-        lprocfs_init_ops_stats(LPROC_FILTER_LAST, exp->exp_ops_stats);
-        lprocfs_counter_init(exp->exp_ops_stats, LPROC_FILTER_READ_BYTES,
-                             LPROCFS_CNTR_AVGMINMAX, "read_bytes", "bytes");
-        lprocfs_counter_init(exp->exp_ops_stats, LPROC_FILTER_WRITE_BYTES,
-                             LPROCFS_CNTR_AVGMINMAX, "write_bytes", "bytes");
-        lprocfs_register_stats(exp->exp_proc, "stats", exp->exp_ops_stats);
         RETURN(0);
 }
 
@@ -214,14 +268,14 @@ 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);
         LASSERTF(cl_idx > -2, "%d\n", cl_idx);
 
         /* Self-export */
-        if (strcmp(fed->fed_fcd->fcd_uuid, obd->obd_uuid.uuid) == 0)
+        if (strcmp(fed->fed_lcd->lcd_uuid, obd->obd_uuid.uuid) == 0)
                 RETURN(0);
 
         /* the bitmap operations can handle cl_idx > sizeof(long) * 8, so
@@ -254,7 +308,7 @@ static int filter_client_add(struct obd_device *obd, struct obd_export *exp,
         LASSERTF(fed->fed_lr_off > 0, "fed_lr_off = %llu\n", fed->fed_lr_off);
 
         CDEBUG(D_INFO, "client at index %d (%llu) with UUID '%s' added\n",
-               fed->fed_lr_idx, fed->fed_lr_off, fed->fed_fcd->fcd_uuid);
+               fed->fed_lr_idx, fed->fed_lr_off, fed->fed_lcd->lcd_uuid);
 
         if (new_client) {
                 struct lvfs_run_ctxt saved;
@@ -262,8 +316,8 @@ static int filter_client_add(struct obd_device *obd, struct obd_export *exp,
                 int rc;
                 void *handle;
 
-                CDEBUG(D_INFO, "writing client fcd at idx %u (%llu) (len %u)\n",
-                       fed->fed_lr_idx,off,(unsigned int)sizeof(*fed->fed_fcd));
+                CDEBUG(D_INFO, "writing client lcd at idx %u (%llu) (len %u)\n",
+                       fed->fed_lr_idx,off,(unsigned int)sizeof(*fed->fed_lcd));
 
                 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
                 /* Transaction needed to fix bug 1403 */
@@ -282,8 +336,8 @@ static int filter_client_add(struct obd_device *obd, struct obd_export *exp,
                                 spin_unlock(&exp->exp_lock);
                         }
                         rc = fsfilt_write_record(obd, filter->fo_rcvd_filp,
-                                                 fed->fed_fcd,
-                                                 sizeof(*fed->fed_fcd),
+                                                 fed->fed_lcd,
+                                                 sizeof(*fed->fed_lcd),
                                                  &off, rc /* sync if no cb */);
                         fsfilt_commit(obd,
                                       filter->fo_rcvd_filp->f_dentry->d_inode,
@@ -300,26 +354,27 @@ 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 filter_client_data zero_fcd;
         struct lvfs_run_ctxt saved;
         int rc;
         loff_t off;
         ENTRY;
 
-        if (fed->fed_fcd == NULL)
+        if (fed->fed_lcd == NULL)
                 RETURN(0);
 
-        /* XXX if fcd_uuid were a real obd_uuid, I could use obd_uuid_equals */
-        if (strcmp(fed->fed_fcd->fcd_uuid, obd->obd_uuid.uuid ) == 0)
+        /* XXX if lcd_uuid were a real obd_uuid, I could use obd_uuid_equals */
+        if (strcmp(fed->fed_lcd->lcd_uuid, obd->obd_uuid.uuid ) == 0)
                 GOTO(free, 0);
 
         CDEBUG(D_INFO, "freeing client at idx %u, offset %lld with UUID '%s'\n",
-               fed->fed_lr_idx, fed->fed_lr_off, fed->fed_fcd->fcd_uuid);
+               fed->fed_lr_idx, fed->fed_lr_off, fed->fed_lcd->lcd_uuid);
 
         LASSERT(filter->fo_last_rcvd_slots != NULL);
 
@@ -342,23 +397,26 @@ static int filter_client_free(struct obd_export *exp)
         }
 
         if (!(exp->exp_flags & OBD_OPT_FAILOVER)) {
-                memset(&zero_fcd, 0, sizeof zero_fcd);
+                /* 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_fcd,
-                                         sizeof(zero_fcd), &off,
-                                         (!exp->exp_libclient ||
-                                          exp->exp_need_sync));
+                rc = fsfilt_write_record(obd, filter->fo_rcvd_filp, &zero_lcd,
+                                         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",
-                       fed->fed_fcd->fcd_uuid, fed->fed_lr_idx, fed->fed_lr_off,
-                       LAST_RCVD, rc);
+                       "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, need_sync ? "" : "a", rc);
         }
 
         if (!test_and_clear_bit(fed->fed_lr_idx, filter->fo_last_rcvd_slots)) {
@@ -369,8 +427,8 @@ static int filter_client_free(struct obd_export *exp)
 
         EXIT;
 free:
-        OBD_FREE(fed->fed_fcd, sizeof(*fed->fed_fcd));
-        fed->fed_fcd = NULL;
+        OBD_FREE_PTR(fed->fed_lcd);
+        fed->fed_lcd = NULL;
 
         return 0;
 }
@@ -484,7 +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);
@@ -549,13 +607,13 @@ static void filter_fmd_cleanup(struct obd_export *exp)
 static int filter_init_export(struct obd_export *exp)
 {
         spin_lock_init(&exp->exp_filter_data.fed_lock);
-        INIT_LIST_HEAD(&exp->exp_filter_data.fed_mod_list);
-       
+        CFS_INIT_LIST_HEAD(&exp->exp_filter_data.fed_mod_list);
+
         spin_lock(&exp->exp_lock);
         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)
@@ -621,7 +679,7 @@ static int filter_init_server_data(struct obd_device *obd, struct file * filp)
 {
         struct filter_obd *filter = &obd->u.filter;
         struct lr_server_data *fsd;
-        struct filter_client_data *fcd = NULL;
+        struct lsd_client_data *lcd = NULL;
         struct inode *inode = filp->f_dentry->d_inode;
         unsigned long last_rcvd_size = i_size_read(inode);
         __u64 mount_count;
@@ -632,8 +690,8 @@ static int filter_init_server_data(struct obd_device *obd, struct file * filp)
         /* ensure padding in the struct is the correct size */
         CLASSERT (offsetof(struct lr_server_data, lsd_padding) +
                  sizeof(fsd->lsd_padding) == LR_SERVER_SIZE);
-        CLASSERT (offsetof(struct filter_client_data, fcd_padding) +
-                 sizeof(fcd->fcd_padding) == LR_CLIENT_SIZE);
+        CLASSERT (offsetof(struct lsd_client_data, lcd_padding) +
+                 sizeof(lcd->lcd_padding) == LR_CLIENT_SIZE);
 
         OBD_ALLOC(fsd, sizeof(*fsd));
         if (!fsd)
@@ -724,60 +782,59 @@ static int filter_init_server_data(struct obd_device *obd, struct file * filp)
                 struct obd_export *exp;
                 struct filter_export_data *fed;
 
-                if (!fcd) {
-                        OBD_ALLOC(fcd, sizeof(*fcd));
-                        if (!fcd)
+                if (!lcd) {
+                        OBD_ALLOC_PTR(lcd);
+                        if (!lcd)
                                 GOTO(err_client, rc = -ENOMEM);
                 }
 
                 /* Don't assume off is incremented properly by
-                 * fsfilt_read_record(), in case sizeof(*fcd)
+                 * fsfilt_read_record(), in case sizeof(*lcd)
                  * isn't the same as fsd->lsd_client_size.  */
                 off = le32_to_cpu(fsd->lsd_client_start) +
                         cl_idx * le16_to_cpu(fsd->lsd_client_size);
-                rc = fsfilt_read_record(obd, filp, fcd, sizeof(*fcd), &off);
+                rc = fsfilt_read_record(obd, filp, lcd, sizeof(*lcd), &off);
                 if (rc) {
                         CERROR("error reading FILT %s idx %d off %llu: rc %d\n",
                                LAST_RCVD, cl_idx, off, rc);
                         break; /* read error shouldn't cause startup to fail */
                 }
 
-                if (fcd->fcd_uuid[0] == '\0') {
+                if (lcd->lcd_uuid[0] == '\0') {
                         CDEBUG(D_INFO, "skipping zeroed client at offset %d\n",
                                cl_idx);
                         continue;
                 }
 
-                last_rcvd = le64_to_cpu(fcd->fcd_last_rcvd);
+                last_rcvd = le64_to_cpu(lcd->lcd_last_transno);
 
                 /* These exports are cleaned up by filter_disconnect(), so they
                  * need to be set up like real exports as filter_connect() does.
                  */
-                exp = class_new_export(obd, (struct obd_uuid *)fcd->fcd_uuid);
+                exp = class_new_export(obd, (struct obd_uuid *)lcd->lcd_uuid);
 
                 CDEBUG(D_HA, "RCVRNG CLIENT uuid: %s idx: %d lr: "LPU64
-                       " srv lr: "LPU64" fcd_group %d\n", fcd->fcd_uuid, cl_idx,
-                       last_rcvd, le64_to_cpu(fsd->lsd_last_transno),
-                       le32_to_cpu(fcd->fcd_group));
+                       " srv lr: "LPU64"\n", lcd->lcd_uuid, cl_idx,
+                       last_rcvd, le64_to_cpu(fsd->lsd_last_transno));
                 if (IS_ERR(exp)) {
                         if (PTR_ERR(exp) == -EALREADY) {
                                 /* export already exists, zero out this one */
                                 CERROR("Zeroing out duplicate export due to "
                                        "bug 10479.\n");
-                                fcd->fcd_uuid[0] = '\0';
+                                lcd->lcd_uuid[0] = '\0';
                         } else {
                                 GOTO(err_client, rc = PTR_ERR(exp));
                         }
                 } else {
                         fed = &exp->exp_filter_data;
-                        fed->fed_fcd = fcd;
-                        fed->fed_group = le32_to_cpu(fcd->fcd_group);
-                        filter_export_stats_init(obd, exp);
+                        fed->fed_lcd = lcd;
+                        fed->fed_group = 0; /* will be assigned at connect */
+                        filter_export_stats_init(obd, exp, NULL);
                         rc = filter_client_add(obd, exp, cl_idx);
                         /* can't fail for existing client */
                         LASSERTF(rc == 0, "rc = %d\n", rc);
 
-                        fcd = NULL;
+                        lcd = NULL;
                         spin_lock(&exp->exp_lock);
                         exp->exp_connecting = 0;
                         exp->exp_in_recovery = 0;
@@ -794,8 +851,8 @@ static int filter_init_server_data(struct obd_device *obd, struct file * filp)
                         fsd->lsd_last_transno = cpu_to_le64(last_rcvd);
         }
 
-        if (fcd)
-                OBD_FREE(fcd, sizeof(*fcd));
+        if (lcd)
+                OBD_FREE_PTR(lcd);
 
         obd->obd_last_committed = le64_to_cpu(fsd->lsd_last_transno);
 
@@ -899,7 +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);
 
@@ -947,7 +1006,8 @@ static int filter_read_group_internal(struct obd_device *obd, int group,
                         RETURN(PTR_ERR(dentry));
                 }
         } else {
-                dentry = simple_mkdir(filter->fo_dentry_O, name, 0700, 1);
+                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,
                                PTR_ERR(dentry));
@@ -981,7 +1041,9 @@ 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, dir, 0700, 1);
+                        tmp_subdirs->dentry[i] = simple_mkdir(dentry,
+                                                              filter->fo_vfsmnt,
+                                                              dir, 0700, 1);
                         if (IS_ERR(tmp_subdirs->dentry[i])) {
                                 rc = PTR_ERR(tmp_subdirs->dentry[i]);
                                 CERROR("can't lookup/create O/%d/%s: rc = %d\n",
@@ -1086,8 +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)
@@ -1107,7 +1167,8 @@ static int filter_prep_groups(struct obd_device *obd)
         loff_t off = 0;
         ENTRY;
 
-        O_dentry = simple_mkdir(current->fs->pwd, "O", 0700, 1);
+        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)) {
                 rc = PTR_ERR(O_dentry);
@@ -1141,8 +1202,9 @@ static int filter_prep_groups(struct obd_device *obd)
                 }
 
                 LOCK_INODE_MUTEX(O_dentry->d_inode);
-                rc = vfs_rename(O_dentry->d_inode, dentry,
-                                O_dentry->d_inode, O0_dentry);
+                rc = ll_vfs_rename(O_dentry->d_inode, dentry, filter->fo_vfsmnt,
+                                   O_dentry->d_inode, O0_dentry,
+                                   filter->fo_vfsmnt);
                 UNLOCK_INODE_MUTEX(O_dentry->d_inode);
 
                 if (rc) {
@@ -1184,7 +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,
@@ -1308,7 +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)
@@ -1355,13 +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;
 }
 
@@ -1372,7 +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];
@@ -1393,7 +1455,7 @@ struct dentry *filter_parent_lock(struct obd_device *obd, obd_gr group,
                 return ERR_PTR(-ENOENT);
 
         rc = filter_lock_dentry(obd, dparent);
-        fsfilt_check_slow(obd, now, obd_timeout, "parent lock");
+        fsfilt_check_slow(obd, now, "parent lock");
         return rc ? ERR_PTR(rc) : dparent;
 }
 
@@ -1473,16 +1535,17 @@ static int filter_prepare_destroy(struct obd_device *obd, obd_id objid,
 {
         struct lustre_handle lockh;
         int flags = LDLM_AST_DISCARD_DATA, rc;
-        struct ldlm_res_id res_id = { .name = { objid, 0, group, 0} };
+        struct ldlm_res_id res_id;
         ldlm_policy_data_t policy = { .l_extent = { 0, OBD_OBJECT_EOF } };
-
         ENTRY;
+
+        osc_build_res_name(objid, group, &res_id);
         /* Tell the clients that the object is gone now and that they should
          * throw away any cached pages. */
         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)
@@ -1496,7 +1559,8 @@ static int filter_prepare_destroy(struct obd_device *obd, obd_id objid,
  * i_sem before starting a handle, while filter_destroy() + vfs_unlink do the
  * reverse.  Caller must take i_sem before starting the transaction and we
  * drop it here before the inode is removed from the dentry.  bug 4180/6984 */
-int filter_vfs_unlink(struct inode *dir, struct dentry *dentry)
+int filter_vfs_unlink(struct inode *dir, struct dentry *dentry,
+                      struct vfsmount *mnt)
 {
         int rc;
         ENTRY;
@@ -1520,8 +1584,9 @@ int filter_vfs_unlink(struct inode *dir, struct dentry *dentry)
                 GOTO(out, rc = -EPERM);
 
         /* check_sticky() */
-        if ((dentry->d_inode->i_uid != current->fsuid && !capable(CAP_FOWNER))||
-            IS_APPEND(dentry->d_inode) || IS_IMMUTABLE(dentry->d_inode))
+        if ((dentry->d_inode->i_uid != current->fsuid &&
+             !cfs_capable(CFS_CAP_FOWNER)) || IS_APPEND(dentry->d_inode) ||
+            IS_IMMUTABLE(dentry->d_inode))
                 GOTO(out, rc = -EPERM);
 
         /* NOTE: This might need to go outside i_mutex, though it isn't clear if
@@ -1529,7 +1594,7 @@ int filter_vfs_unlink(struct inode *dir, struct dentry *dentry)
          *       here) or some other ordering issue. */
         DQUOT_INIT(dir);
 
-        rc = security_inode_unlink(dir, dentry);
+        rc = ll_security_inode_unlink(dir, dentry, mnt);
         if (rc)
                 GOTO(out, rc);
 
@@ -1551,6 +1616,7 @@ static int filter_destroy_internal(struct obd_device *obd, obd_id objid,
                                    struct dentry *dchild)
 {
         struct inode *inode = dchild->d_inode;
+        struct filter_obd *filter = &obd->u.filter;
         int rc;
 
         if (inode->i_nlink != 1 || atomic_read(&inode->i_count) != 1) {
@@ -1560,7 +1626,7 @@ static int filter_destroy_internal(struct obd_device *obd, obd_id objid,
                        atomic_read(&inode->i_count));
         }
 
-        rc = filter_vfs_unlink(dparent->d_inode, dchild);
+        rc = filter_vfs_unlink(dparent->d_inode, dchild, filter->fo_vfsmnt);
         if (rc)
                 CERROR("error unlinking objid %.*s: rc %d\n",
                        dchild->d_name.len, dchild->d_name.name, rc);
@@ -1602,7 +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);
                 }
 
@@ -1618,7 +1684,7 @@ static int filter_intent_policy(struct ldlm_namespace *ns,
                                 struct ldlm_lock **lockp, void *req_cookie,
                                 ldlm_mode_t mode, int flags, void *data)
 {
-        struct list_head rpc_list = LIST_HEAD_INIT(rpc_list);
+        CFS_LIST_HEAD(rpc_list);
         struct ptlrpc_request *req = req_cookie;
         struct ldlm_lock *lock = *lockp, *l = NULL;
         struct ldlm_resource *res = lock->l_resource;
@@ -1629,7 +1695,7 @@ static int filter_intent_policy(struct ldlm_namespace *ns,
         int idx, rc, tmpflags = 0, only_liblustre = 1;
         struct ldlm_interval_tree *tree;
         struct filter_intent_args arg;
-        int repsize[3] = { [MSG_PTLRPC_BODY_OFF] = sizeof(struct ptlrpc_body),
+        __u32 repsize[3] = { [MSG_PTLRPC_BODY_OFF] = sizeof(struct ptlrpc_body),
                            [DLM_LOCKREPLY_OFF]   = sizeof(*rep),
                            [DLM_REPLY_REC_OFF]   = sizeof(*reply_lvb) };
         ENTRY;
@@ -1651,14 +1717,11 @@ static int filter_intent_policy(struct ldlm_namespace *ns,
 
         //fixup_handle_for_resent_req(req, lock, &lockh);
 
-        /* If we grant any lock at all, it will be a whole-file read lock.
-         * Call the extent policy function to see if our request can be
-         * granted, or is blocked. 
-         * If the OST lock has LDLM_FL_HAS_INTENT set, it means a glimpse lock
+        /* Call the extent policy function to see if our request can be
+         * granted, or is blocked.
+         * If the OST lock has LDLM_FL_HAS_INTENT set, it means a glimpse
+         * lock, and should not be granted if the lock will be blocked.
          */
-        lock->l_policy_data.l_extent.start = 0;
-        lock->l_policy_data.l_extent.end = OBD_OBJECT_EOF;
-        lock->l_req_mode = LCK_PR;
 
         LASSERT(ns == res->lr_namespace);
         lock_res(res);
@@ -1674,7 +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. */
@@ -1718,7 +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);
@@ -1770,7 +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);
 }
@@ -1826,6 +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().
  */
@@ -1852,7 +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;
 
@@ -1887,6 +1975,7 @@ int filter_common_setup(struct obd_device *obd, struct lustre_cfg* lcfg,
         __u8 *uuid_ptr;
         char *str, *label;
         char ns_name[48];
+        request_queue_t *q;
         int rc, i;
         ENTRY;
 
@@ -1924,7 +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;
@@ -1950,7 +2043,7 @@ int filter_common_setup(struct obd_device *obd, struct lustre_cfg* lcfg,
         obd->obd_lvfs_ctxt.fs = get_ds();
         obd->obd_lvfs_ctxt.cb_ops = filter_lvfs_ops;
 
-        sema_init(&filter->fo_init_lock, 1);
+        init_mutex(&filter->fo_init_lock);
         filter->fo_committed_group = 0;
 
         rc = filter_prep(obd);
@@ -1966,24 +2059,23 @@ 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;
 
-        INIT_LIST_HEAD(&filter->fo_llog_list);
+        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;
-        INIT_LIST_HEAD(&filter->fo_capa_keys);
+        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)
                 GOTO(err_ops, rc = -ENOMEM);
 
         sprintf(ns_name, "filter-%s", obd->obd_uuid.uuid);
-        obd->obd_namespace = ldlm_namespace_new(ns_name, LDLM_NAMESPACE_SERVER,
+        obd->obd_namespace = ldlm_namespace_new(obd, ns_name, LDLM_NAMESPACE_SERVER,
                                                 LDLM_NAMESPACE_GREEDY);
         if (obd->obd_namespace == NULL)
                 GOTO(err_post, rc = -ENOMEM);
@@ -1994,16 +2086,30 @@ 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);
 
+        q = bdev_get_queue(mnt->mnt_sb->s_bdev);
+        if (q->max_sectors < q->max_hw_sectors &&
+            q->max_sectors < PTLRPC_MAX_BRW_SIZE >> 9)
+                LCONSOLE_INFO("%s: underlying device %s should be tuned "
+                              "for larger I/O requests: max_sectors = %u "
+                              "could be up to max_hw_sectors=%u\n",
+                              obd->obd_name, mnt->mnt_sb->s_id,
+                              q->max_sectors, q->max_hw_sectors);
+
         uuid_ptr = fsfilt_uuid(obd, obd->u.obt.obt_sb);
         if (uuid_ptr != NULL) {
                 class_uuid_unparse(uuid_ptr, &uuid);
@@ -2016,18 +2122,17 @@ int filter_common_setup(struct obd_device *obd, struct lustre_cfg* lcfg,
 
         if (obd->obd_recovering) {
                 LCONSOLE_WARN("OST %s now serving %s (%s%s%s), but will be in "
-                              "recovery until %d %s reconnect, or if no clients"
-                              " reconnect for %d:%.02d; during that time new "
-                              "clients will not be allowed to connect. "
+                              "recovery for at least %d:%.02d, or until %d "
+                              "client%s reconnect. During this time new clients"
+                              " will not be allowed to connect. "
                               "Recovery progress can be monitored by watching "
                               "/proc/fs/lustre/obdfilter/%s/recovery_status.\n",
                               obd->obd_name, lustre_cfg_string(lcfg, 1),
                               label ?: "", label ? "/" : "", str,
+                              obd->obd_recovery_timeout / 60,
+                              obd->obd_recovery_timeout % 60,
                               obd->obd_max_recoverable_clients,
-                              (obd->obd_max_recoverable_clients == 1)
-                              ? "client" : "clients",
-                              (int)(OBD_RECOVERY_TIMEOUT) / 60,
-                              (int)(OBD_RECOVERY_TIMEOUT) % 60,
+                              (obd->obd_max_recoverable_clients == 1) ? "":"s",
                               obd->obd_name);
         } else {
                 LCONSOLE_INFO("OST %s now serving %s (%s%s%s) with recovery "
@@ -2081,11 +2186,37 @@ 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 = proc_mkdir("exports",
-                                                   obd->obd_proc_entry);
+                obd->obd_proc_exports_entry = lprocfs_register("exports",
+                                                        obd->obd_proc_entry,
+                                                        NULL, NULL);
+                if (IS_ERR(obd->obd_proc_exports_entry)) {
+                        rc = PTR_ERR(obd->obd_proc_exports_entry);
+                        CERROR("error %d setting up lprocfs for %s\n",
+                               rc, "exports");
+                        obd->obd_proc_exports_entry = NULL;
+                }
         }
+        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, NULL);
 
         memcpy((void *)addr, lustre_cfg_buf(lcfg, 4),
                LUSTRE_CFG_BUFLEN(lcfg, 4));
@@ -2093,163 +2224,277 @@ static int filter_setup(struct obd_device *obd, struct lustre_cfg* lcfg)
         OBD_PAGE_FREE(page);
 
         if (rc) {
-                lprocfs_obd_cleanup(obd);
+                lprocfs_remove_proc_entry("clear", obd->obd_proc_exports_entry);
+                lprocfs_free_per_client_stats(obd);
                 lprocfs_free_obd_stats(obd);
+                lprocfs_obd_cleanup(obd);
         }
 
         return rc;
 }
 
-static struct llog_operations filter_mds_ost_repl_logops /* initialized below*/;
+static struct llog_operations filter_mds_ost_repl_logops;
+
 static struct llog_operations filter_size_orig_logops = {
-        lop_setup: llog_obd_origin_setup,
-        lop_cleanup: llog_obd_origin_cleanup,
-        lop_add: llog_obd_origin_add
+        .lop_setup   = llog_obd_origin_setup,
+        .lop_cleanup = llog_obd_origin_cleanup,
+        .lop_add     = llog_obd_origin_add
 };
 
-static int filter_llog_init(struct obd_device *obd, int group,
-                            struct obd_device *tgt, int count,
-                            struct llog_catid *catid,
-                            struct obd_uuid *uuid)
+static int filter_olg_fini(struct obd_llog_group *olg)
 {
-        struct filter_obd *filter = &obd->u.filter;
-        struct obd_llog_group *olg;
         struct llog_ctxt *ctxt;
-        int rc;
+        int rc = 0, rc2 = 0;
         ENTRY;
 
-        olg = filter_find_olg(obd, group);
-        if (IS_ERR(olg))
-                RETURN(PTR_ERR(olg));
-
-        if (group == OBD_LLOG_GROUP) {
-                LASSERT(filter->fo_lcm == NULL);
-                OBD_ALLOC(filter->fo_lcm, sizeof(struct llog_commit_master));
-                if (!filter->fo_lcm)
-                        RETURN(-ENOMEM);
+        ctxt = llog_group_get_ctxt(olg, LLOG_MDS_OST_REPL_CTXT);
+        if (ctxt)
+                rc = llog_cleanup(ctxt);
 
-                rc = llog_init_commit_master((struct llog_commit_master *)
-                                             filter->fo_lcm);
-                if (rc)
-                        GOTO(cleanup, rc);
+        ctxt = llog_group_get_ctxt(olg, LLOG_SIZE_ORIG_CTXT);
+        if (ctxt) {
+                rc2 = llog_cleanup(ctxt);
+                if (!rc)
+                        rc = rc2;
+        }
 
-        filter_mds_ost_repl_logops = llog_client_ops;
-        filter_mds_ost_repl_logops.lop_cancel = llog_obd_repl_cancel;
-        filter_mds_ost_repl_logops.lop_connect = llog_repl_connect;
-        filter_mds_ost_repl_logops.lop_sync = llog_obd_repl_sync;
-        } else {
-                LASSERT(filter->fo_lcm != NULL);
+        ctxt = llog_group_get_ctxt(olg, LLOG_CONFIG_ORIG_CTXT);
+        if (ctxt) {
+                rc2 = llog_cleanup(ctxt);
+                if (!rc)
+                        rc = rc2;
         }
-        rc = llog_setup(obd, olg, LLOG_MDS_OST_REPL_CTXT, tgt, 0, NULL,
-                        &filter_mds_ost_repl_logops);
-        if (rc)
-                GOTO(cleanup, rc);
 
-        /* FIXME - assign unlink_cb for filter's recovery */
-        LASSERT(olg);
-        ctxt = llog_group_get_ctxt(olg, LLOG_MDS_OST_REPL_CTXT);
+        RETURN(rc);
+}
 
-        LASSERT(ctxt != NULL);
-        ctxt->llog_proc_cb = filter_recov_log_mds_ost_cb;
-        ctxt->loc_lcm = obd->u.filter.fo_lcm;
-        rc = llog_start_commit_thread(ctxt->loc_lcm);
-        llog_ctxt_put(ctxt);
+static int
+filter_olg_init(struct obd_device *obd, struct obd_llog_group *olg,
+                struct obd_device *tgt)
+{
+        int rc;
+        ENTRY;
+
+        rc = llog_setup(obd, olg, LLOG_MDS_OST_REPL_CTXT, tgt, 0, NULL,
+                        &filter_mds_ost_repl_logops);
         if (rc)
                 GOTO(cleanup, rc);
 
         rc = llog_setup(obd, olg, LLOG_SIZE_ORIG_CTXT, tgt, 0, NULL,
                         &filter_size_orig_logops);
-
+        if (rc)
+                GOTO(cleanup, rc);
+        EXIT;
 cleanup:
-        if (rc) {
-                llog_cleanup_commit_master(filter->fo_lcm, 0);
-                OBD_FREE(filter->fo_lcm, sizeof(struct llog_commit_master));
-                filter->fo_lcm = NULL;
-        }
-        RETURN(rc);
+        if (rc)
+                filter_olg_fini(olg);
+        return rc;
 }
 
-static int filter_group_llog_finish(struct obd_llog_group *olg)
+/**
+ * Init the default olg, which is embeded in the obd_device, for filter.
+ */
+static int
+filter_default_olg_init(struct obd_device *obd, struct obd_llog_group *olg,
+                        struct obd_device *tgt)
 {
+        struct filter_obd *filter = &obd->u.filter;
         struct llog_ctxt *ctxt;
-        int rc = 0, rc2 = 0;
+        int rc;
         ENTRY;
 
+        filter->fo_lcm = llog_recov_thread_init(obd->obd_name);
+        if (!filter->fo_lcm)
+                RETURN(-ENOMEM);
+
+        filter_mds_ost_repl_logops = llog_client_ops;
+        filter_mds_ost_repl_logops.lop_cancel = llog_obd_repl_cancel;
+        filter_mds_ost_repl_logops.lop_connect = llog_obd_repl_connect;
+        filter_mds_ost_repl_logops.lop_sync = llog_obd_repl_sync;
+
+        rc = filter_olg_init(obd, olg, tgt);
+        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)
-                rc = llog_cleanup(ctxt);
+        if (!ctxt) {
+                CERROR("Can't get ctxt for %p:%x\n", olg,
+                       LLOG_MDS_OST_REPL_CTXT);
+                GOTO(cleanup_olg, rc = -ENODEV);
+        }
+        ctxt->loc_lcm = filter->fo_lcm;
+        ctxt->llog_proc_cb = filter_recov_log_mds_ost_cb;
+        llog_ctxt_put(ctxt);
 
-        ctxt = llog_group_get_ctxt(olg, LLOG_SIZE_ORIG_CTXT);
-        if (ctxt)
-                rc2 = llog_cleanup(ctxt);
-        if (!rc)
-                rc = rc2;
+        RETURN(0);
+cleanup_olg:
+        filter_olg_fini(olg);
+cleanup_lcm:
+        llog_recov_thread_fini(filter->fo_lcm, 1);
+        filter->fo_lcm = NULL;
+        return rc;
+}
+
+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)
+{
+        struct filter_obd *filter = &obd->u.filter;
+        struct llog_ctxt *ctxt;
+        int rc;
+        ENTRY;
+
+        LASSERT(olg != NULL);
+        if (olg == &obd->obd_olg)
+                return filter_default_olg_init(obd, olg, tgt);
 
+        LASSERT(filter->fo_lcm != NULL);
+        rc = filter_olg_init(obd, olg, tgt);
+        if (rc)
+                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,
+                       LLOG_MDS_OST_REPL_CTXT);
+                filter_olg_fini(olg);
+                RETURN(-ENODEV);
+        }
+        ctxt->llog_proc_cb = filter_recov_log_mds_ost_cb;
+        ctxt->loc_lcm = filter->fo_lcm;
+        llog_ctxt_put(ctxt);
         RETURN(rc);
 }
 
 static int filter_llog_finish(struct obd_device *obd, int count)
 {
-        int rc;
+        struct filter_obd *filter = &obd->u.filter;
+        struct llog_ctxt *ctxt;
         ENTRY;
 
-        if (obd->u.filter.fo_lcm) { 
-                llog_cleanup_commit_master((struct llog_commit_master *)
-                                           obd->u.filter.fo_lcm, 0);
-                OBD_FREE(obd->u.filter.fo_lcm, 
-                         sizeof(struct llog_commit_master));
-                obd->u.filter.fo_lcm = NULL;
+        ctxt = llog_group_get_ctxt(&obd->obd_olg, LLOG_MDS_OST_REPL_CTXT);
+        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, as llog is already synchronized
+                 * and its import may go.
+                 */
+                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);
         }
-        /* finish obd llog group */
-        rc = filter_group_llog_finish(&obd->obd_olg);
 
-        RETURN(rc);
+        if (filter->fo_lcm) {
+                llog_recov_thread_fini(filter->fo_lcm, obd->obd_force);
+                filter->fo_lcm = NULL;
+        }
+        RETURN(filter_olg_fini(&obd->obd_olg));
 }
 
+/**
+ * Find the group llog according to group index in the llog group list.
+ */
+static struct obd_llog_group *
+filter_find_olg_internal(struct filter_obd *filter, int group)
+{
+        struct obd_llog_group *olg;
+
+        LASSERT_SPIN_LOCKED(&filter->fo_llog_list_lock);
+        list_for_each_entry(olg, &filter->fo_llog_list, olg_list) {
+                if (olg->olg_group == group)
+                        RETURN(olg);
+        }
+        RETURN(NULL);
+}
+
+/**
+ * Find the group llog according to group index on the filter
+ */
 struct obd_llog_group *filter_find_olg(struct obd_device *obd, int group)
 {
-        struct obd_llog_group *olg, *nolg;
+        struct obd_llog_group *olg = NULL;
+        struct filter_obd *filter;
+
+        filter = &obd->u.filter;
+
+        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);
+}
+/**
+ * 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
+ * with OST.
+ */
+struct obd_llog_group *filter_find_create_olg(struct obd_device *obd, int group)
+{
+        struct obd_llog_group *olg = NULL;
         struct filter_obd *filter;
         int rc;
 
         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);
-        list_for_each_entry(olg, &filter->fo_llog_list, olg_list) {
-                if (olg->olg_group == group) {
-                        spin_unlock(&filter->fo_llog_list_lock);
-                        RETURN(olg);
+        olg = filter_find_olg_internal(filter, group);
+        if (olg) {
+                if (olg->olg_initializing) {
+                        GOTO(out_unlock, olg = ERR_PTR(-EBUSY));
+                } else {
+                        GOTO(out_unlock, olg);
                 }
         }
-        spin_unlock(&filter->fo_llog_list_lock);
-
         OBD_ALLOC_PTR(olg);
         if (olg == NULL)
-                RETURN(ERR_PTR(-ENOMEM));
+               GOTO(out_unlock, olg = ERR_PTR(-ENOMEM));
 
         llog_group_init(olg, group);
-        spin_lock(&filter->fo_llog_list_lock);
-        list_for_each_entry(nolg, &filter->fo_llog_list, olg_list) {
-                LASSERT(nolg->olg_group != group);
-        }
         list_add(&olg->olg_list, &filter->fo_llog_list);
+        olg->olg_initializing = 1;
         spin_unlock(&filter->fo_llog_list_lock);
 
         rc = llog_cat_initialize(obd, olg, 1, NULL);
         if (rc) {
-                spin_lock(&filter->fo_llog_list_lock);
-                list_del(&olg->olg_list);
-                spin_unlock(&filter->fo_llog_list_lock);
-                OBD_FREE_PTR(olg);
-                RETURN(ERR_PTR(rc));
+               spin_lock(&filter->fo_llog_list_lock);
+               list_del(&olg->olg_list);
+               spin_unlock(&filter->fo_llog_list_lock);
+               OBD_FREE_PTR(olg);
+               GOTO(out, olg = ERR_PTR(-ENOMEM));
         }
+        spin_lock(&filter->fo_llog_list_lock);
+        olg->olg_initializing = 0;
+        spin_unlock(&filter->fo_llog_list_lock);
         CDEBUG(D_OTHER, "%s: new llog group %u (0x%p)\n",
-               obd->obd_name, group, olg);
-
+              obd->obd_name, group, olg);
+out:
         RETURN(olg);
+
+out_unlock:
+        spin_unlock(&filter->fo_llog_list_lock);
+        GOTO(out, olg);
 }
 
 static int filter_llog_connect(struct obd_export *exp,
@@ -2261,20 +2506,27 @@ 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 (IS_ERR(olg))
-                RETURN(PTR_ERR(olg));
+        if (!olg) {
+                CERROR(" %s: can not find olg of group %d\n",
+                       obd->obd_name, (int)body->lgdc_logid.lgl_ogr);
+                RETURN(-ENOENT);
+        }
         llog_group_set_export(olg, 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)
@@ -2284,10 +2536,11 @@ static int filter_llog_connect(struct obd_export *exp,
         RETURN(rc);
 }
 
-static int filter_llog_preclean (struct obd_device *obd)
+static int filter_llog_preclean(struct obd_device *obd)
 {
-        struct obd_llog_group *olg;
+        struct obd_llog_group *olg, *tmp;
         struct filter_obd *filter;
+        struct list_head  remove_list;
         int rc = 0;
         ENTRY;
 
@@ -2296,21 +2549,25 @@ static int filter_llog_preclean (struct obd_device *obd)
                 CERROR("failed to cleanup llogging subsystem\n");
 
         filter = &obd->u.filter;
+        CFS_INIT_LIST_HEAD(&remove_list);
+
         spin_lock(&filter->fo_llog_list_lock);
         while (!list_empty(&filter->fo_llog_list)) {
                 olg = list_entry(filter->fo_llog_list.next,
                                  struct obd_llog_group, olg_list);
                 list_del(&olg->olg_list);
-                spin_unlock(&filter->fo_llog_list_lock);
+                list_add(&olg->olg_list, &remove_list);
+        }
+        spin_unlock(&filter->fo_llog_list_lock);
 
-                rc = filter_group_llog_finish(olg);
+        list_for_each_entry_safe(olg, tmp, &remove_list, olg_list) {
+                list_del_init(&olg->olg_list);
+                rc = filter_olg_fini(olg);
                 if (rc)
                         CERROR("failed to cleanup llogging subsystem for %u\n",
                                olg->olg_group);
                 OBD_FREE_PTR(olg);
-                spin_lock(&filter->fo_llog_list_lock);
         }
-        spin_unlock(&filter->fo_llog_list_lock);
 
         RETURN(rc);
 }
@@ -2328,10 +2585,6 @@ static int filter_precleanup(struct obd_device *obd,
                 target_cleanup_recovery(obd);
                 rc = filter_llog_preclean(obd);
                 break;
-        case OBD_CLEANUP_SELF_EXP:
-                break;
-        case OBD_CLEANUP_OBD:
-                break;
         }
         RETURN(rc);
 }
@@ -2354,15 +2607,18 @@ static int filter_cleanup(struct obd_device *obd)
                 }
         }
 
-        lprocfs_obd_cleanup(obd);
+        lprocfs_remove_proc_entry("clear", obd->obd_proc_exports_entry);
+        lprocfs_free_per_client_stats(obd);
         lprocfs_free_obd_stats(obd);
+        lprocfs_obd_cleanup(obd);
         lquota_cleanup(filter_quota_interface_ref, obd);
 
         /* Stop recovery before namespace cleanup. */
         target_stop_recovery_thread(obd);
         target_cleanup_recovery(obd);
 
-        ldlm_namespace_free(obd->obd_namespace, obd->obd_force);
+        ldlm_namespace_free(obd->obd_namespace, NULL, obd->obd_force);
+        obd->obd_namespace = NULL;
 
         sptlrpc_rule_set_free(&filter->fo_sptlrpc_rset);
 
@@ -2371,9 +2627,8 @@ static int filter_cleanup(struct obd_device *obd)
 
         filter_post(obd);
 
-        shrink_dcache_parent(obd->u.obt.obt_sb->s_root);
-
         LL_DQUOT_OFF(obd->u.obt.obt_sb);
+        shrink_dcache_sb(obd->u.obt.obt_sb);
 
         server_put_mount(obd->obd_name, filter->fo_vfsmnt);
         obd->u.obt.obt_sb = NULL;
@@ -2390,6 +2645,8 @@ static int filter_cleanup(struct obd_device *obd)
 static int filter_connect_internal(struct obd_export *exp,
                                    struct obd_connect_data *data)
 {
+        struct filter_export_data *fed = &exp->exp_filter_data;
+
         if (!data)
                 RETURN(0);
 
@@ -2399,20 +2656,27 @@ static int filter_connect_internal(struct obd_export *exp,
                data->ocd_connect_flags, data->ocd_version,
                data->ocd_grant, data->ocd_index);
 
+        if (fed->fed_group != 0 && fed->fed_group != data->ocd_group) {
+                CWARN("!!! This export (nid %s) used object group %d "
+                       "earlier; now it's trying to use group %d!  This could "
+                       "be a bug in the MDS. Please report to "
+                       "http://bugzilla.lustre.org/\n",
+                       obd_export_nid2str(exp), fed->fed_group,data->ocd_group);
+                RETURN(-EPROTO);
+        }
+        fed->fed_group = data->ocd_group;
+
         data->ocd_connect_flags &= OST_CONNECT_SUPPORTED;
         exp->exp_connect_flags = data->ocd_connect_flags;
         data->ocd_version = LUSTRE_VERSION_CODE;
 
-        if ((exp->exp_connect_flags & OBD_CONNECT_FID) == 0) {
-                CWARN("%s: OST requires FID support (flag="LPX64
-                      "), but client not\n",
-                      exp->exp_obd->obd_name,
-                      exp->exp_connect_flags);
-                RETURN(-EBADF);
-        }
+        /* 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_export_data *fed = &exp->exp_filter_data;
+                struct filter_obd *filter = &exp->exp_obd->u.filter;
                 obd_size left, want;
 
                 spin_lock(&exp->exp_obd->obd_osfs_lock);
@@ -2426,6 +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) {
@@ -2494,7 +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;
@@ -2503,68 +2770,61 @@ 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)
+                          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 filter_client_data *fcd = NULL;
+        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);
-        group = data->ocd_group;
+        filter_export_stats_init(obd, lexp, localdata);
         if (obd->obd_replayable) {
-                OBD_ALLOC(fcd, sizeof(*fcd));
-                if (!fcd) {
+                OBD_ALLOC(lcd, sizeof(*lcd));
+                if (!lcd) {
                         CERROR("filter: out of memory for client data\n");
                         GOTO(cleanup, rc = -ENOMEM);
                 }
 
-                memcpy(fcd->fcd_uuid, cluuid, sizeof(fcd->fcd_uuid));
-                fed->fed_fcd = fcd;
-                fed->fed_fcd->fcd_group = group;
-                rc = filter_client_add(obd, exp, -1);
+                memcpy(lcd->lcd_uuid, cluuid, sizeof(lcd->lcd_uuid));
+                fed->fed_lcd = lcd;
+                rc = filter_client_add(obd, lexp, -1);
                 if (rc)
                         GOTO(cleanup, rc);
         }
-        CWARN("%s: Received MDS connection ("LPX64"); group %d\n",
-               obd->obd_name, exp->exp_handle.h_cookie, group);
-        if (group == 0)
-                GOTO(cleanup, rc);
 
-        if (fed->fed_group != 0 && fed->fed_group != group) {
-                CERROR("!!! This export (nid %s) used object group %d "
-                       "earlier; now it's trying to use group %d!  This could "
-                       "be a bug in the MDS.  Tell CFS.\n",
-                       obd_export_nid2str(exp), fed->fed_group, group);
-                GOTO(cleanup, rc = -EPROTO);
-        }
-        fed->fed_group = group;
+        group = data->ocd_group;
+
+        CWARN("%s: Received MDS connection ("LPX64"); group %d\n",
+              obd->obd_name, lexp->exp_handle.h_cookie, group);
 
         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
         rc = filter_read_groups(obd, group, 1);
@@ -2578,13 +2838,14 @@ static int filter_connect(const struct lu_env *env,
 
 cleanup:
         if (rc) {
-                if (fcd) {
-                        OBD_FREE(fcd, sizeof(*fcd));
-                        fed->fed_fcd = NULL;
+                if (lcd) {
+                        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);
@@ -2711,16 +2972,14 @@ 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);
 
-        lprocfs_exp_cleanup(exp);
 
         if (exp->exp_obd->obd_replayable)
                 filter_client_free(exp);
@@ -2730,6 +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__);
 
@@ -2740,7 +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;
 
@@ -2777,18 +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;
@@ -2802,6 +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)
@@ -2809,8 +3081,8 @@ static int filter_disconnect(struct obd_export *exp)
 
         fsfilt_sync(obd, obd->u.obt.obt_sb);
 
-        /* flush any remaining cancel messages out to the target */
-        filter_sync_llogs(obd, exp);
+        lprocfs_exp_cleanup(exp);
+
         class_export_put(exp);
         RETURN(rc);
 }
@@ -2939,6 +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;
@@ -2958,12 +3231,13 @@ int filter_setattr_internal(struct obd_export *exp, struct dentry *dentry,
         if (oa->o_valid & OBD_MD_FLCOOKIE) {
                 OBD_ALLOC(fcc, sizeof(*fcc));
                 if (fcc != NULL)
-                        memcpy(fcc, obdo_logcookie(oa), sizeof(*fcc));
+                        *fcc = oa->o_lcookie;
         }
 
         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;
         }
 
@@ -3044,14 +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;
         }
@@ -3080,23 +3357,52 @@ out_unlock:
 int filter_setattr(struct obd_export *exp, struct obd_info *oinfo,
                    struct obd_trans_info *oti)
 {
-        struct ldlm_res_id res_id = { .name = { oinfo->oi_oa->o_id, 0,
-                                                oinfo->oi_oa->o_gr, 0 } };
+        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;
 
-        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);
 
-        dentry = __filter_oa2dentry(exp->exp_obd, oinfo->oi_oa,
-                                    __FUNCTION__, 1);
+        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 (oa->o_valid & OBD_MD_FLSIZE &&
+            oinfo->oi_policy.l_extent.end != OBD_OBJECT_EOF) {
+                static char mdsinum[48];
+
+                if (oa->o_valid & OBD_MD_FLFID)
+                        snprintf(mdsinum, sizeof(mdsinum) - 1,
+                                 " 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),
+                       oa->o_id, mdsinum);
+                RETURN(-EPERM);
+        }
+
+        dentry = __filter_oa2dentry(exp->exp_obd, oa, __FUNCTION__, 1);
         if (IS_ERR(dentry))
                 RETURN(PTR_ERR(dentry));
 
@@ -3104,16 +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);
 
@@ -3121,14 +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;
@@ -3197,15 +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);
 
@@ -3223,26 +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);
@@ -3261,6 +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);
@@ -3275,14 +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);
                 }
@@ -3304,7 +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);
@@ -3409,7 +3732,7 @@ static int filter_precreate(struct obd_device *obd, struct obdo *oa,
         struct filter_obd *filter;
         struct obd_statfs *osfs;
         int err = 0, rc = 0, recreate_obj = 0, i;
-        unsigned long enough_time = jiffies + min(obd_timeout * HZ / 4, 10U*HZ);
+        cfs_time_t enough_time = cfs_time_shift(DISK_TIMEOUT/2);
         obd_id next_id;
         void *handle = NULL;
         ENTRY;
@@ -3452,7 +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;
@@ -3466,8 +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));
@@ -3513,6 +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. */
@@ -3570,34 +3895,35 @@ 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;
 
         if (fed->fed_group != group) {
                 CERROR("!!! this export (nid %s) used object group %d "
                         "earlier; now it's trying to use group %d!  This could "
-                        "be a bug in the MDS.  Tell CFS.\n",
+                        "be a bug in the MDS. Please report to "
+                        "http://bugzilla.lustre.org/\n",
                         obd_export_nid2str(exp), fed->fed_group, group);
                 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) {
@@ -3644,7 +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;
@@ -3659,12 +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));
@@ -3677,10 +4011,13 @@ int filter_destroy(struct obd_export *exp, struct obdo *oa,
                 if (oa->o_valid & OBD_MD_FLCOOKIE) {
                         struct llog_ctxt *ctxt;
                         struct obd_llog_group *olg;
-                        fcc = obdo_logcookie(oa);
+                        fcc = &oa->o_lcookie;
                         olg = filter_find_olg(obd, oa->o_gr);
-                        if (IS_ERR(olg))
-                                GOTO(cleanup, rc = PTR_ERR(olg));
+                        if (!olg) {
+                               CERROR(" %s: can not find olg of group %d\n",
+                                      obd->obd_name, (int)oa->o_gr);
+                               GOTO(cleanup, rc = PTR_ERR(olg));
+                        }
                         llog_group_set_export(olg, exp);
 
                         ctxt = llog_group_get_ctxt(olg, fcc->lgc_subsys + 1);
@@ -3697,7 +4034,7 @@ int filter_destroy(struct obd_export *exp, struct obdo *oa,
         if (oa->o_valid & OBD_MD_FLCOOKIE) {
                 OBD_ALLOC(fcc, sizeof(*fcc));
                 if (fcc != NULL)
-                        memcpy(fcc, obdo_logcookie(oa), sizeof(*fcc));
+                        *fcc = oa->o_lcookie;
         }
         DQUOT_INIT(dchild->d_inode);
 
@@ -3761,13 +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);
@@ -3797,9 +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;
 }
 
@@ -3821,13 +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);
 }
 
@@ -3848,10 +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);
         }
@@ -3888,7 +4221,8 @@ static int filter_sync(struct obd_export *exp, struct obdo *oa,
 }
 
 static int filter_get_info(struct obd_export *exp, __u32 keylen,
-                           void *key, __u32 *vallen, void *val)
+                           void *key, __u32 *vallen, void *val,
+                           struct lov_stripe_md *lsm)
 {
         struct obd_device *obd;
         ENTRY;
@@ -3899,7 +4233,7 @@ static int filter_get_info(struct obd_export *exp, __u32 keylen,
                 RETURN(-EINVAL);
         }
 
-        if (KEY_IS("blocksize")) {
+        if (KEY_IS(KEY_BLOCKSIZE)) {
                 __u32 *blocksize = val;
                 if (blocksize) {
                         if (*vallen < sizeof(*blocksize))
@@ -3910,7 +4244,7 @@ static int filter_get_info(struct obd_export *exp, __u32 keylen,
                 RETURN(0);
         }
 
-        if (KEY_IS("blocksize_bits")) {
+        if (KEY_IS(KEY_BLOCKSIZE_BITS)) {
                 __u32 *blocksize_bits = val;
                 if (blocksize_bits) {
                         if (*vallen < sizeof(*blocksize_bits))
@@ -3921,7 +4255,7 @@ static int filter_get_info(struct obd_export *exp, __u32 keylen,
                 RETURN(0);
         }
 
-        if (KEY_IS("last_id")) {
+        if (KEY_IS(KEY_LAST_ID)) {
                 obd_id *last_id = val;
                 /* FIXME: object groups */
                 if (last_id) {
@@ -3934,17 +4268,64 @@ static int filter_get_info(struct obd_export *exp, __u32 keylen,
                 RETURN(0);
         }
 
+        if (KEY_IS(KEY_FIEMAP)) {
+                struct ll_fiemap_info_key *fm_key = key;
+                struct dentry *dentry;
+                struct ll_user_fiemap *fiemap = val;
+                struct lvfs_run_ctxt saved;
+                int rc;
+
+                if (fiemap == NULL) {
+                        *vallen = fiemap_count_to_size(
+                                                fm_key->fiemap.fm_extent_count);
+                        RETURN(0);
+                }
+
+                dentry = __filter_oa2dentry(exp->exp_obd, &fm_key->oa,
+                                            __FUNCTION__, 1);
+                if (IS_ERR(dentry))
+                        RETURN(PTR_ERR(dentry));
+
+                memcpy(fiemap, &fm_key->fiemap, sizeof(*fiemap));
+                push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
+                rc = fsfilt_iocontrol(obd, dentry->d_inode, NULL,
+                                      EXT3_IOC_FIEMAP, (long)fiemap);
+                pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
+
+                f_dput(dentry);
+                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;
 
@@ -3963,9 +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);
 
@@ -3974,23 +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_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);
 }
 
@@ -4097,39 +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;
         }
 
@@ -4235,7 +4605,7 @@ static void __exit obdfilter_exit(void)
                  sizeof(*obdfilter_created_scratchpad));
 }
 
-MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
+MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
 MODULE_DESCRIPTION("Lustre Filtering OBD driver");
 MODULE_LICENSE("GPL");