X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Fmdt%2Fmdt_lproc.c;h=9bc252288661ce78779c73861d8c3e812e0877bb;hb=c6f3d533542b9462b5b8df95183d80321d4d9c34;hp=3417caeb1fb3032310656e8fb27e52ba9a474af2;hpb=7c8ebf7b9825d0aadd9ffcf01508f093afc68af9;p=fs%2Flustre-release.git

diff --git a/lustre/mdt/mdt_lproc.c b/lustre/mdt/mdt_lproc.c
index 3417cae..9bc2522 100644
--- a/lustre/mdt/mdt_lproc.c
+++ b/lustre/mdt/mdt_lproc.c
@@ -1,6 +1,4 @@
-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
  * GPL HEADER START
  *
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
@@ -17,11 +15,7 @@
  *
  * 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
- *
- * 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.
+ * http://www.gnu.org/licenses/gpl-2.0.html
  *
  * GPL HEADER END
  */
@@ -29,8 +23,7 @@
  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
  *
- * Copyright (c) 2011 Whamcloud, Inc.
- *
+ * Copyright (c) 2011, 2017, Intel Corporation.
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
@@ -42,18 +35,15 @@
  * Author: Fan Yong <fanyong@clusterfs.com>
  */
 
-#ifndef EXPORT_SYMTAB
-# define EXPORT_SYMTAB
-#endif
 #define DEBUG_SUBSYSTEM S_MDS
 
 #include <linux/version.h>
 #include <asm/statfs.h>
 
 #include <linux/module.h>
-
+#include <uapi/linux/lnet/nidstr.h>
 /* LUSTRE_VERSION_CODE */
-#include <lustre_ver.h>
+#include <uapi/linux/lustre/lustre_ver.h>
 /*
  * struct OBD_{ALLOC,FREE}*()
  * MDT_FAIL_CHECK
@@ -65,17 +55,8 @@
 #include <obd.h>
 #include <obd_class.h>
 #include <lustre_mds.h>
-#include <lustre_mdt.h>
 #include <lprocfs_status.h>
-#include <lu_time.h>
 #include "mdt_internal.h"
-#include <lnet/lib-lnet.h>
-
-enum {
-        LPROC_MDT_NR
-};
-static const char *mdt_proc_names[LPROC_MDT_NR] = {
-};
 
 /**
  * The rename stats output would be YAML formats, like
@@ -95,8 +76,6 @@ static const char *mdt_proc_names[LPROC_MDT_NR] = {
  *     16kB: { samples: 12, pct: 3, cum_pct: 81 }
  **/
 
-#define pct(a, b) (b ? a * 100 / b : 0)
-
 static void display_rename_stats(struct seq_file *seq, char *name,
                                  struct obd_histogram *hist)
 {
@@ -120,8 +99,8 @@ static void display_rename_stats(struct seq_file *seq, char *name,
                 else
                         seq_printf(seq, "%6s%d%s", " ", 1<<(i-20), "MB:");
 
-                seq_printf(seq, " { sample: %3lu, pct: %3lu, cum_pct: %3lu }\n",
-                           t, pct(t, tot), pct(cum, tot));
+		seq_printf(seq, " { sample: %3lu, pct: %3u, cum_pct: %3u }\n",
+			   t, pct(t, tot), pct(cum, tot));
 
                 if (cum == tot)
                         break;
@@ -131,13 +110,13 @@ static void display_rename_stats(struct seq_file *seq, char *name,
 static void rename_stats_show(struct seq_file *seq,
                               struct rename_stats *rename_stats)
 {
-        struct timeval now;
+	struct timespec64 now;
 
-        /* this sampling races with updates */
-        do_gettimeofday(&now);
-        seq_printf(seq, "rename_stats:\n");
-        seq_printf(seq, "- %-15s %lu.%lu\n", "snapshot_time:",
-                   now.tv_sec, now.tv_usec);
+	/* this sampling races with updates */
+	ktime_get_real_ts64(&now);
+	seq_printf(seq, "rename_stats:\n");
+	seq_printf(seq, "- %-15s %llu.%9lu\n", "snapshot_time:",
+		   (s64)now.tv_sec, now.tv_nsec);
 
         display_rename_stats(seq, "same_dir",
                              &rename_stats->hist[RENAME_SAMEDIR_SIZE]);
@@ -147,8 +126,6 @@ static void rename_stats_show(struct seq_file *seq,
                              &rename_stats->hist[RENAME_CROSSDIR_TGT_SIZE]);
 }
 
-#undef pct
-
 static int mdt_rename_stats_seq_show(struct seq_file *seq, void *v)
 {
         struct mdt_device *mdt = seq->private;
@@ -158,8 +135,9 @@ static int mdt_rename_stats_seq_show(struct seq_file *seq, void *v)
         return 0;
 }
 
-static ssize_t mdt_rename_stats_seq_write(struct file *file, const char *buf,
-                                          size_t len, loff_t *off)
+static ssize_t
+mdt_rename_stats_seq_write(struct file *file, const char __user *buf,
+			   size_t len, loff_t *off)
 {
         struct seq_file *seq = file->private_data;
         struct mdt_device *mdt = seq->private;
@@ -170,27 +148,24 @@ static ssize_t mdt_rename_stats_seq_write(struct file *file, const char *buf,
 
         return len;
 }
-
 LPROC_SEQ_FOPS(mdt_rename_stats);
 
 static int lproc_mdt_attach_rename_seqstat(struct mdt_device *mdt)
 {
-        struct lu_device *ld = &mdt->mdt_md_dev.md_lu_dev;
-        struct obd_device *obd = ld->ld_obd;
-        int i;
+	int i;
 
-        for (i = 0; i < RENAME_LAST; i++)
-                spin_lock_init(&mdt->mdt_rename_stats.hist[i].oh_lock);
+	for (i = 0; i < RENAME_LAST; i++)
+		spin_lock_init(&mdt->mdt_rename_stats.hist[i].oh_lock);
 
-        return lprocfs_obd_seq_create(obd, "rename_stats", 0444,
-                                      &mdt_rename_stats_fops, mdt);
+	return lprocfs_obd_seq_create(mdt2obd_dev(mdt), "rename_stats", 0644,
+				      &mdt_rename_stats_fops, mdt);
 }
 
 void mdt_rename_counter_tally(struct mdt_thread_info *info,
-                              struct mdt_device *mdt,
-                              struct obd_export *exp,
-                              struct mdt_object *src,
-                              struct mdt_object *tgt)
+			      struct mdt_device *mdt,
+			      struct ptlrpc_request *req,
+			      struct mdt_object *src,
+			      struct mdt_object *tgt)
 {
         struct md_attr *ma = &info->mti_attr;
         struct rename_stats *rstats = &mdt->mdt_rename_stats;
@@ -201,18 +176,18 @@ void mdt_rename_counter_tally(struct mdt_thread_info *info,
         rc = mo_attr_get(info->mti_env, mdt_object_child(src), ma);
         if (rc) {
                 CERROR("%s: "DFID" attr_get, rc = %d\n",
-                       exp->exp_obd->obd_name, PFID(mdt_object_fid(src)), rc);
+		       mdt_obd_name(mdt), PFID(mdt_object_fid(src)), rc);
                 return;
         }
 
         if (src == tgt) {
-                mdt_counter_incr(exp, LPROC_MDT_SAMEDIR_RENAME);
+		mdt_counter_incr(req, LPROC_MDT_SAMEDIR_RENAME);
                 lprocfs_oh_tally_log2(&rstats->hist[RENAME_SAMEDIR_SIZE],
                                       (unsigned int)ma->ma_attr.la_size);
                 return;
         }
 
-        mdt_counter_incr(exp, LPROC_MDT_CROSSDIR_RENAME);
+	mdt_counter_incr(req, LPROC_MDT_CROSSDIR_RENAME);
         lprocfs_oh_tally_log2(&rstats->hist[RENAME_CROSSDIR_SRC_SIZE],
                               (unsigned int)ma->ma_attr.la_size);
 
@@ -221,7 +196,7 @@ void mdt_rename_counter_tally(struct mdt_thread_info *info,
         rc = mo_attr_get(info->mti_env, mdt_object_child(tgt), ma);
         if (rc) {
                 CERROR("%s: "DFID" attr_get, rc = %d\n",
-                       exp->exp_obd->obd_name, PFID(mdt_object_fid(tgt)), rc);
+		       mdt_obd_name(mdt), PFID(mdt_object_fid(tgt)), rc);
                 return;
         }
 
@@ -229,787 +204,1084 @@ void mdt_rename_counter_tally(struct mdt_thread_info *info,
                               (unsigned int)ma->ma_attr.la_size);
 }
 
-int mdt_procfs_init(struct mdt_device *mdt, const char *name)
+static int mdt_identity_expire_seq_show(struct seq_file *m, void *data)
 {
-        struct lu_device *ld = &mdt->mdt_md_dev.md_lu_dev;
-        struct obd_device *obd = ld->ld_obd;
-        struct lprocfs_static_vars lvars;
-        int rc;
-        ENTRY;
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 
-        LASSERT(name != NULL);
-
-        lprocfs_mdt_init_vars(&lvars);
-        rc = lprocfs_obd_setup(obd, lvars.obd_vars);
-        if (rc) {
-                CERROR("Can't init lprocfs, rc %d\n", rc);
-                return rc;
-        }
-        ptlrpc_lprocfs_register_obd(obd);
-
-        mdt->mdt_proc_entry = obd->obd_proc_entry;
-        LASSERT(mdt->mdt_proc_entry != NULL);
-
-        rc = lu_time_init(&mdt->mdt_stats, mdt->mdt_proc_entry,
-                          mdt_proc_names, ARRAY_SIZE(mdt_proc_names));
-        if (rc == 0)
-                rc = lu_time_named_init(&ld->ld_site->ls_time_stats,
-                                        "site_time", mdt->mdt_proc_entry,
-                                         lu_time_names,
-                                         ARRAY_SIZE(lu_time_names));
-        if (rc)
-                return rc;
-
-        obd->obd_proc_exports_entry = proc_mkdir("exports",
-                                                 obd->obd_proc_entry);
-        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);
-        rc = lprocfs_alloc_md_stats(obd, LPROC_MDT_LAST);
-        if (rc == 0)
-                mdt_stats_counter_init(obd->md_stats);
-
-        rc = lproc_mdt_attach_rename_seqstat(mdt);
-        if (rc)
-                CERROR("%s: MDT can not create rename stats rc = %d\n",
-                       obd->obd_name, rc);
-
-        RETURN(rc);
-}
-
-int mdt_procfs_fini(struct mdt_device *mdt)
-{
-        struct lu_device *ld = &mdt->mdt_md_dev.md_lu_dev;
-        struct obd_device *obd = ld->ld_obd;
-
-        if (obd->obd_proc_exports_entry) {
-                lprocfs_remove_proc_entry("clear", obd->obd_proc_exports_entry);
-                obd->obd_proc_exports_entry = NULL;
-        }
-        lprocfs_free_per_client_stats(obd);
-        lprocfs_obd_cleanup(obd);
-        ptlrpc_lprocfs_unregister_obd(obd);
-        if (mdt->mdt_proc_entry) {
-                lu_time_fini(&ld->ld_site->ls_time_stats);
-                lu_time_fini(&mdt->mdt_stats);
-                mdt->mdt_proc_entry = NULL;
-        }
-        lprocfs_free_md_stats(obd);
-        lprocfs_free_obd_stats(obd);
-
-        RETURN(0);
+	seq_printf(m, "%lld\n", mdt->mdt_identity_cache->uc_entry_expire);
+	return 0;
 }
 
-void mdt_time_start(const struct mdt_thread_info *info)
+static ssize_t
+mdt_identity_expire_seq_write(struct file *file, const char __user *buffer,
+			      size_t count, loff_t *off)
 {
-        lu_lprocfs_time_start(info->mti_env);
-}
+	struct seq_file	  *m = file->private_data;
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+	time64_t val;
+	int rc;
 
-void mdt_time_end(const struct mdt_thread_info *info, int idx)
-{
-        lu_lprocfs_time_end(info->mti_env, info->mti_mdt->mdt_stats, idx);
-}
+	rc = kstrtoll_from_user(buffer, count, 0, &val);
+	if (rc)
+		return rc;
 
-static int lprocfs_rd_identity_expire(char *page, char **start, off_t off,
-                                      int count, int *eof, void *data)
-{
-        struct obd_device *obd = data;
-        struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+	if (val < 0)
+		return -ERANGE;
 
-        *eof = 1;
-        return snprintf(page, count, "%u\n",
-                        mdt->mdt_identity_cache->uc_entry_expire);
+	mdt->mdt_identity_cache->uc_entry_expire = val;
+
+	return count;
 }
+LPROC_SEQ_FOPS(mdt_identity_expire);
 
-static int lprocfs_wr_identity_expire(struct file *file, const char *buffer,
-                                      unsigned long count, void *data)
+static int mdt_identity_acquire_expire_seq_show(struct seq_file *m, void *data)
 {
-        struct obd_device *obd = data;
-        struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
-        int rc, val;
-
-        rc = lprocfs_write_helper(buffer, count, &val);
-        if (rc)
-                return rc;
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 
-        mdt->mdt_identity_cache->uc_entry_expire = val;
-        return count;
+	seq_printf(m, "%lld\n", mdt->mdt_identity_cache->uc_acquire_expire);
+	return 0;
 }
 
-static int lprocfs_rd_identity_acquire_expire(char *page, char **start,
-                                              off_t off, int count, int *eof,
-                                              void *data)
+static ssize_t
+mdt_identity_acquire_expire_seq_write(struct file *file,
+				      const char __user *buffer,
+				      size_t count, loff_t *off)
 {
-        struct obd_device *obd = data;
-        struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+	struct seq_file	  *m = file->private_data;
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+	time64_t val;
+	int rc;
 
-        *eof = 1;
-        return snprintf(page, count, "%u\n",
-                        mdt->mdt_identity_cache->uc_acquire_expire);
-}
+	rc = kstrtoll_from_user(buffer, count, 0, &val);
+	if (rc)
+		return rc;
 
-static int lprocfs_wr_identity_acquire_expire(struct file *file,
-                                              const char *buffer,
-                                              unsigned long count,
-                                              void *data)
-{
-        struct obd_device *obd = data;
-        struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
-        int rc, val;
+	if (val < 0 || val > INT_MAX)
+		return -ERANGE;
 
-        rc = lprocfs_write_helper(buffer, count, &val);
-        if (rc)
-                return rc;
+	mdt->mdt_identity_cache->uc_acquire_expire = val;
 
-        mdt->mdt_identity_cache->uc_acquire_expire = val;
-        return count;
+	return count;
 }
+LPROC_SEQ_FOPS(mdt_identity_acquire_expire);
 
-static int lprocfs_rd_identity_upcall(char *page, char **start, off_t off,
-                                      int count, int *eof, void *data)
+static int mdt_identity_upcall_seq_show(struct seq_file *m, void *data)
 {
-        struct obd_device *obd = data;
-        struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
-        struct upcall_cache *hash = mdt->mdt_identity_cache;
-        int len;
-
-        *eof = 1;
-        cfs_read_lock(&hash->uc_upcall_rwlock);
-        len = snprintf(page, count, "%s\n", hash->uc_upcall);
-        cfs_read_unlock(&hash->uc_upcall_rwlock);
-        return len;
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+	struct upcall_cache *hash = mdt->mdt_identity_cache;
+
+	down_read(&hash->uc_upcall_rwsem);
+	seq_printf(m, "%s\n", hash->uc_upcall);
+	up_read(&hash->uc_upcall_rwsem);
+	return 0;
 }
 
-static int lprocfs_wr_identity_upcall(struct file *file, const char *buffer,
-                                      unsigned long count, void *data)
+static ssize_t
+mdt_identity_upcall_seq_write(struct file *file, const char __user *buffer,
+			      size_t count, loff_t *off)
 {
-        struct obd_device *obd = data;
-        struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
-        struct upcall_cache *hash = mdt->mdt_identity_cache;
-        int rc;
-        char *kernbuf;
-
-        if (count >= UC_CACHE_UPCALL_MAXPATH) {
-                CERROR("%s: identity upcall too long\n", obd->obd_name);
-                return -EINVAL;
-        }
-        OBD_ALLOC(kernbuf, count + 1);
-        if (kernbuf == NULL)
-                GOTO(failed, rc = -ENOMEM);
-        if (cfs_copy_from_user(kernbuf, buffer, count))
-                GOTO(failed, rc = -EFAULT);
-
-        /* Remove any extraneous bits from the upcall (e.g. linefeeds) */
-        cfs_write_lock(&hash->uc_upcall_rwlock);
-        sscanf(kernbuf, "%s", hash->uc_upcall);
-        cfs_write_unlock(&hash->uc_upcall_rwlock);
-
-        if (strcmp(hash->uc_name, obd->obd_name) != 0)
-                CWARN("%s: write to upcall name %s\n",
-                      obd->obd_name, hash->uc_upcall);
-
-        if (strcmp(hash->uc_upcall, "NONE") == 0 && mdt->mdt_opts.mo_acl)
-                CWARN("%s: disable \"identity_upcall\" with ACL enabled maybe "
-                      "cause unexpected \"EACCESS\"\n", obd->obd_name);
-
-        CWARN("%s: identity upcall set to %s\n", obd->obd_name, hash->uc_upcall);
-        OBD_FREE(kernbuf, count + 1);
-        RETURN(count);
+	struct seq_file		*m = file->private_data;
+	struct obd_device	*obd = m->private;
+	struct mdt_device	*mdt = mdt_dev(obd->obd_lu_dev);
+	struct upcall_cache	*hash = mdt->mdt_identity_cache;
+	int			 rc;
+	char			*kernbuf;
+
+	if (count >= UC_CACHE_UPCALL_MAXPATH) {
+		CERROR("%s: identity upcall too long\n", mdt_obd_name(mdt));
+		return -EINVAL;
+	}
+	OBD_ALLOC(kernbuf, count + 1);
+	if (kernbuf == NULL)
+		GOTO(failed, rc = -ENOMEM);
+	if (copy_from_user(kernbuf, buffer, count))
+		GOTO(failed, rc = -EFAULT);
+
+	/* Remove any extraneous bits from the upcall (e.g. linefeeds) */
+	down_write(&hash->uc_upcall_rwsem);
+	sscanf(kernbuf, "%s", hash->uc_upcall);
+	up_write(&hash->uc_upcall_rwsem);
+
+	if (strcmp(hash->uc_name, mdt_obd_name(mdt)) != 0)
+		CWARN("%s: write to upcall name %s\n",
+		      mdt_obd_name(mdt), hash->uc_upcall);
+
+	if (strcmp(hash->uc_upcall, "NONE") == 0 && mdt->mdt_opts.mo_acl)
+		CWARN("%s: disable \"identity_upcall\" with ACL enabled maybe "
+		      "cause unexpected \"EACCESS\"\n", mdt_obd_name(mdt));
+
+	CDEBUG(D_CONFIG, "%s: identity upcall set to %s\n", mdt_obd_name(mdt),
+	       hash->uc_upcall);
+	OBD_FREE(kernbuf, count + 1);
+	RETURN(count);
 
  failed:
-        if (kernbuf)
-                OBD_FREE(kernbuf, count + 1);
-        RETURN(rc);
+	if (kernbuf)
+		OBD_FREE(kernbuf, count + 1);
+	RETURN(rc);
 }
+LPROC_SEQ_FOPS(mdt_identity_upcall);
 
-static int lprocfs_wr_identity_flush(struct file *file, const char *buffer,
-                                     unsigned long count, void *data)
+static ssize_t
+lprocfs_identity_flush_seq_write(struct file *file, const char __user *buffer,
+				 size_t count, void *data)
 {
-        struct obd_device *obd = data;
-        struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
-        int rc, uid;
-
-        rc = lprocfs_write_helper(buffer, count, &uid);
-        if (rc)
-                return rc;
-
-        mdt_flush_identity(mdt->mdt_identity_cache, uid);
-        return count;
+	struct seq_file   *m = file->private_data;
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+	int uid;
+	int rc;
+
+	rc = kstrtoint_from_user(buffer, count, 0, &uid);
+	if (rc)
+		return rc;
+
+	mdt_flush_identity(mdt->mdt_identity_cache, uid);
+	return count;
 }
+LPROC_SEQ_FOPS_WR_ONLY(mdt, identity_flush);
 
-static int lprocfs_wr_identity_info(struct file *file, const char *buffer,
-                                    unsigned long count, void *data)
+static ssize_t
+lprocfs_identity_info_seq_write(struct file *file, const char __user *buffer,
+				size_t count, void *data)
 {
-        struct obd_device *obd = data;
-        struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
-        struct identity_downcall_data *param;
-        int size = sizeof(*param), rc, checked = 0;
+	struct seq_file	  *m = file->private_data;
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+	struct identity_downcall_data *param;
+	int size = sizeof(*param), rc, checked = 0;
 
 again:
-        if (count < size) {
-                CERROR("%s: invalid data count = %lu, size = %d\n",
-                       obd->obd_name, count, size);
-                return -EINVAL;
-        }
-
-        OBD_ALLOC(param, size);
-        if (param == NULL)
-                return -ENOMEM;
-
-        if (cfs_copy_from_user(param, buffer, size)) {
-                CERROR("%s: bad identity data\n", obd->obd_name);
-                GOTO(out, rc = -EFAULT);
-        }
-
-        if (checked == 0) {
-                checked = 1;
-                if (param->idd_magic != IDENTITY_DOWNCALL_MAGIC) {
-                        CERROR("%s: MDS identity downcall bad params\n",
-                               obd->obd_name);
-                        GOTO(out, rc = -EINVAL);
-                }
-
-                if (param->idd_nperms > N_PERMS_MAX) {
-                        CERROR("%s: perm count %d more than maximum %d\n",
-                               obd->obd_name, param->idd_nperms, N_PERMS_MAX);
-                        GOTO(out, rc = -EINVAL);
-                }
-
-                if (param->idd_ngroups > NGROUPS_MAX) {
-                        CERROR("%s: group count %d more than maximum %d\n",
-                               obd->obd_name, param->idd_ngroups, NGROUPS_MAX);
-                        GOTO(out, rc = -EINVAL);
-                }
-
-                if (param->idd_ngroups) {
-                        rc = param->idd_ngroups; /* save idd_ngroups */
-                        OBD_FREE(param, size);
-                        size = offsetof(struct identity_downcall_data,
-                                        idd_groups[rc]);
-                        goto again;
-                }
-        }
-
-        rc = upcall_cache_downcall(mdt->mdt_identity_cache, param->idd_err,
-                                   param->idd_uid, param);
+	if (count < size) {
+		CERROR("%s: invalid data count = %lu, size = %d\n",
+		       mdt_obd_name(mdt), (unsigned long) count, size);
+		return -EINVAL;
+	}
+
+	OBD_ALLOC(param, size);
+	if (param == NULL)
+		return -ENOMEM;
+
+	if (copy_from_user(param, buffer, size)) {
+		CERROR("%s: bad identity data\n", mdt_obd_name(mdt));
+		GOTO(out, rc = -EFAULT);
+	}
+
+	if (checked == 0) {
+		checked = 1;
+		if (param->idd_magic != IDENTITY_DOWNCALL_MAGIC) {
+			CERROR("%s: MDS identity downcall bad params\n",
+			       mdt_obd_name(mdt));
+			GOTO(out, rc = -EINVAL);
+		}
+
+		if (param->idd_nperms > N_PERMS_MAX) {
+			CERROR("%s: perm count %d more than maximum %d\n",
+			       mdt_obd_name(mdt), param->idd_nperms,
+			       N_PERMS_MAX);
+			GOTO(out, rc = -EINVAL);
+		}
+
+		if (param->idd_ngroups > NGROUPS_MAX) {
+			CERROR("%s: group count %d more than maximum %d\n",
+			       mdt_obd_name(mdt), param->idd_ngroups,
+			       NGROUPS_MAX);
+			GOTO(out, rc = -EINVAL);
+		}
+
+		if (param->idd_ngroups) {
+			rc = param->idd_ngroups; /* save idd_ngroups */
+			OBD_FREE(param, size);
+			size = offsetof(struct identity_downcall_data,
+					idd_groups[rc]);
+			goto again;
+		}
+	}
+
+	rc = upcall_cache_downcall(mdt->mdt_identity_cache, param->idd_err,
+				   param->idd_uid, param);
 
 out:
-        if (param != NULL)
-                OBD_FREE(param, size);
+	if (param != NULL)
+		OBD_FREE(param, size);
 
-        return rc ? rc : count;
+	return rc ? rc : count;
 }
+LPROC_SEQ_FOPS_WR_ONLY(mdt, identity_info);
 
-/* for debug only */
-static int lprocfs_rd_capa(char *page, char **start, off_t off,
-                           int count, int *eof, void *data)
+static int mdt_site_stats_seq_show(struct seq_file *m, void *data)
 {
-        struct obd_device *obd = data;
-        struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 
-        return snprintf(page, count, "capability on: %s %s\n",
-                        mdt->mdt_opts.mo_oss_capa ? "oss" : "",
-                        mdt->mdt_opts.mo_mds_capa ? "mds" : "");
+	return lu_site_stats_seq_print(mdt_lu_site(mdt), m);
 }
+LPROC_SEQ_FOPS_RO(mdt_site_stats);
 
-static int lprocfs_wr_capa(struct file *file, const char *buffer,
-                           unsigned long count, void *data)
+#define BUFLEN (UUID_MAX + 4)
+
+static ssize_t
+lprocfs_mds_evict_client_seq_write(struct file *file, const char __user *buf,
+				   size_t count, loff_t *off)
 {
-        struct obd_device *obd = data;
-        struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
-        int val, rc;
+	struct seq_file	  *m = file->private_data;
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+	char *kbuf;
+	char *tmpbuf;
+	int rc = 0;
+
+	OBD_ALLOC(kbuf, BUFLEN);
+	if (kbuf == NULL)
+		return -ENOMEM;
+
+	/*
+	 * OBD_ALLOC() will zero kbuf, but we only copy BUFLEN - 1
+	 * bytes into kbuf, to ensure that the string is NUL-terminated.
+	 * UUID_MAX should include a trailing NUL already.
+	 */
+	if (copy_from_user(kbuf, buf, min_t(unsigned long, BUFLEN - 1, count)))
+		GOTO(out, rc = -EFAULT);
+	tmpbuf = cfs_firststr(kbuf, min_t(unsigned long, BUFLEN - 1, count));
+
+	if (strncmp(tmpbuf, "nid:", 4) != 0) {
+		count = lprocfs_evict_client_seq_write(file, buf, count, off);
+		goto out;
+	}
+
+	if (mdt->mdt_opts.mo_evict_tgt_nids) {
+		rc = obd_set_info_async(NULL, mdt->mdt_child_exp,
+					sizeof(KEY_EVICT_BY_NID),
+					KEY_EVICT_BY_NID,
+					strlen(tmpbuf + 4) + 1,
+					tmpbuf + 4, NULL);
+		if (rc)
+			CERROR("Failed to evict nid %s from OSTs: rc %d\n",
+			       tmpbuf + 4, rc);
+	}
+
+	/* See the comments in function lprocfs_wr_evict_client()
+	 * in ptlrpc/lproc_ptlrpc.c for details. - jay */
+	class_incref(obd, __func__, current);
+	obd_export_evict_by_nid(obd, tmpbuf + 4);
+	class_decref(obd, __func__, current);
 
-        rc = lprocfs_write_helper(buffer, count, &val);
-        if (rc)
-                return rc;
 
-        if (val < 0 || val > 3) {
-                CERROR("invalid capability mode, only 0/2/3 is accepted.\n"
-                       " 0:  disable fid capability\n"
-                       " 2:  enable MDS fid capability\n"
-                       " 3:  enable both MDS and OSS fid capability\n");
-                return -EINVAL;
-        }
+out:
+	OBD_FREE(kbuf, BUFLEN);
+	return rc < 0 ? rc : count;
+}
 
-        /* OSS fid capability needs enable both MDS and OSS fid capability on
-         * MDS */
-        if (val == 1) {
-                CERROR("can't enable OSS fid capability only, you should use "
-                       "'3' to enable both MDS and OSS fid capability.\n");
-                return -EINVAL;
-        }
+#undef BUFLEN
+
+static int mdt_evict_tgt_nids_seq_show(struct seq_file *m, void *data)
+{
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 
-        mdt->mdt_opts.mo_oss_capa = (val & 0x1);
-        mdt->mdt_opts.mo_mds_capa = !!(val & 0x2);
-        mdt->mdt_capa_conf = 1;
-        LCONSOLE_INFO("MDS %s %s MDS fid capability.\n",
-                      obd->obd_name,
-                      mdt->mdt_opts.mo_mds_capa ? "enabled" : "disabled");
-        LCONSOLE_INFO("MDS %s %s OSS fid capability.\n",
-                      obd->obd_name,
-                      mdt->mdt_opts.mo_oss_capa ? "enabled" : "disabled");
-        return count;
+	seq_printf(m, "%u\n", mdt->mdt_opts.mo_evict_tgt_nids);
+	return 0;
 }
 
-static int lprocfs_rd_capa_count(char *page, char **start, off_t off,
-                                 int count, int *eof, void *data)
+static ssize_t
+mdt_evict_tgt_nids_seq_write(struct file *file, const char __user *buffer,
+			       size_t count, loff_t *off)
 {
-        return snprintf(page, count, "%d %d\n",
-                        capa_count[CAPA_SITE_CLIENT],
-                        capa_count[CAPA_SITE_SERVER]);
+	struct seq_file   *m = file->private_data;
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+	bool val;
+	int rc;
+
+	rc = kstrtobool_from_user(buffer, count, &val);
+	if (rc)
+		return rc;
+
+	mdt->mdt_opts.mo_evict_tgt_nids = val;
+	return count;
 }
+LPROC_SEQ_FOPS(mdt_evict_tgt_nids);
 
-static int lprocfs_rd_site_stats(char *page, char **start, off_t off,
-                                 int count, int *eof, void *data)
+static int mdt_cos_seq_show(struct seq_file *m, void *data)
 {
-        struct obd_device *obd = data;
-        struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 
-        return lu_site_stats_print(mdt_lu_site(mdt), page, count);
+	seq_printf(m, "%u\n", mdt_cos_is_enabled(mdt));
+	return 0;
 }
 
-static int lprocfs_rd_capa_timeout(char *page, char **start, off_t off,
-                                   int count, int *eof, void *data)
+static ssize_t
+mdt_cos_seq_write(struct file *file, const char __user *buffer,
+		  size_t count, loff_t *off)
 {
-        struct obd_device *obd = data;
-        struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
-
-        return snprintf(page, count, "%lu\n", mdt->mdt_capa_timeout);
+	struct seq_file   *m = file->private_data;
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+	bool val;
+	int rc;
+
+	rc = kstrtobool_from_user(buffer, count, &val);
+	if (rc)
+		return rc;
+
+	mdt_enable_cos(mdt, val);
+	return count;
 }
+LPROC_SEQ_FOPS(mdt_cos);
 
-static int lprocfs_wr_capa_timeout(struct file *file, const char *buffer,
-                                   unsigned long count, void *data)
+static int mdt_root_squash_seq_show(struct seq_file *m, void *data)
 {
-        struct obd_device *obd = data;
-        struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
-        int val, rc;
-
-        rc = lprocfs_write_helper(buffer, count, &val);
-        if (rc)
-                return rc;
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+	struct root_squash_info *squash = &mdt->mdt_squash;
 
-        mdt->mdt_capa_timeout = (unsigned long)val;
-        mdt->mdt_capa_conf = 1;
-        return count;
+	seq_printf(m, "%u:%u\n", squash->rsi_uid,
+		   squash->rsi_gid);
+	return 0;
 }
 
-static int lprocfs_rd_ck_timeout(char *page, char **start, off_t off, int count,
-                                 int *eof, void *data)
+static ssize_t
+mdt_root_squash_seq_write(struct file *file, const char __user *buffer,
+			  size_t count, loff_t *off)
 {
-        struct obd_device *obd = data;
-        struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+	struct seq_file   *m = file->private_data;
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+	struct root_squash_info *squash = &mdt->mdt_squash;
 
-        return snprintf(page, count, "%lu\n", mdt->mdt_ck_timeout);
+	return lprocfs_wr_root_squash(buffer, count, squash,
+				      mdt_obd_name(mdt));
 }
+LPROC_SEQ_FOPS(mdt_root_squash);
 
-static int lprocfs_wr_ck_timeout(struct file *file, const char *buffer,
-                                 unsigned long count, void *data)
+static int mdt_nosquash_nids_seq_show(struct seq_file *m, void *data)
 {
-        struct obd_device *obd = data;
-        struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
-        int val, rc;
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+	struct root_squash_info *squash = &mdt->mdt_squash;
+	int len = 0;
+
+	down_read(&squash->rsi_sem);
+	if (!list_empty(&squash->rsi_nosquash_nids)) {
+		len = cfs_print_nidlist(m->buf + m->count, m->size - m->count,
+					&squash->rsi_nosquash_nids);
+		m->count += len;
+		seq_putc(m, '\n');
+	} else
+		seq_puts(m, "NONE\n");
+	up_read(&squash->rsi_sem);
+
+	return 0;
+}
 
-        rc = lprocfs_write_helper(buffer, count, &val);
-        if (rc)
-                return rc;
+static ssize_t
+mdt_nosquash_nids_seq_write(struct file *file, const char __user *buffer,
+			    size_t count, loff_t *off)
+{
+	struct seq_file   *m = file->private_data;
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+	struct root_squash_info *squash = &mdt->mdt_squash;
 
-        mdt->mdt_ck_timeout = (unsigned long)val;
-        mdt->mdt_capa_conf = 1;
-        return count;
+	return lprocfs_wr_nosquash_nids(buffer, count, squash,
+					mdt_obd_name(mdt));
 }
+LPROC_SEQ_FOPS(mdt_nosquash_nids);
 
-static int lprocfs_mdt_wr_evict_client(struct file *file, const char *buffer,
-                                       unsigned long count, void *data)
+static int mdt_enable_remote_dir_seq_show(struct seq_file *m, void *data)
 {
-        char tmpbuf[sizeof(struct obd_uuid)];
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 
-        sscanf(buffer, "%40s", tmpbuf);
+	seq_printf(m, "%u\n", mdt->mdt_enable_remote_dir);
+	return 0;
+}
 
-        if (strncmp(tmpbuf, "nid:", 4) != 0)
-                return lprocfs_wr_evict_client(file, buffer, count, data);
+static ssize_t
+mdt_enable_remote_dir_seq_write(struct file *file, const char __user *buffer,
+				size_t count, loff_t *off)
+{
+	struct seq_file   *m = file->private_data;
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+	bool val;
+	int rc;
+
+	rc = kstrtobool_from_user(buffer, count, &val);
+	if (rc)
+		return rc;
+
+	mdt->mdt_enable_remote_dir = val;
+	return count;
+}
+LPROC_SEQ_FOPS(mdt_enable_remote_dir);
 
-        CERROR("NOT implement evict client by nid %s\n", tmpbuf);
+static int mdt_enable_remote_dir_gid_seq_show(struct seq_file *m, void *data)
+{
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 
-        return count;
+	seq_printf(m, "%d\n",
+		  (int)mdt->mdt_enable_remote_dir_gid);
+	return 0;
 }
 
-static int lprocfs_rd_sec_level(char *page, char **start, off_t off,
-                                int count, int *eof, void *data)
+static ssize_t
+mdt_enable_remote_dir_gid_seq_write(struct file *file,
+				    const char __user *buffer,
+				    size_t count, loff_t *off)
 {
-        struct obd_device *obd = data;
-        struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
-
-        return snprintf(page, count, "%d\n", mdt->mdt_sec_level);
+	struct seq_file   *m = file->private_data;
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+	int val;
+	int rc;
+
+	rc = kstrtoint_from_user(buffer, count, 0, &val);
+	if (rc)
+		return rc;
+
+	mdt->mdt_enable_remote_dir_gid = val;
+	return count;
 }
+LPROC_SEQ_FOPS(mdt_enable_remote_dir_gid);
 
-static int lprocfs_wr_sec_level(struct file *file, const char *buffer,
-                                unsigned long count, void *data)
+static int mdt_enable_striped_dir_seq_show(struct seq_file *m, void *data)
 {
-        struct obd_device *obd = data;
-        struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
-        int val, rc;
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 
-        rc = lprocfs_write_helper(buffer, count, &val);
-        if (rc)
-                return rc;
+	seq_printf(m, "%u\n", mdt->mdt_enable_striped_dir);
+	return 0;
+}
 
-        if (val > LUSTRE_SEC_ALL || val < LUSTRE_SEC_NONE)
-                return -EINVAL;
+static ssize_t
+mdt_enable_striped_dir_seq_write(struct file *file, const char __user *buffer,
+				 size_t count, loff_t *off)
+{
+	struct seq_file   *m = file->private_data;
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+	bool val;
+	int rc;
+
+	rc = kstrtobool_from_user(buffer, count, &val);
+	if (rc)
+		return rc;
+
+	mdt->mdt_enable_striped_dir = val;
+	return count;
+}
+LPROC_SEQ_FOPS(mdt_enable_striped_dir);
 
-        if (val == LUSTRE_SEC_SPECIFY) {
-                CWARN("security level %d will be supported in future.\n",
-                      LUSTRE_SEC_SPECIFY);
-                return -EINVAL;
-        }
+static int mdt_enable_dir_migration_seq_show(struct seq_file *m, void *data)
+{
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 
-        mdt->mdt_sec_level = val;
-        return count;
+	seq_printf(m, "%u\n", mdt->mdt_enable_dir_migration);
+	return 0;
 }
 
-static int lprocfs_rd_cos(char *page, char **start, off_t off,
-                              int count, int *eof, void *data)
+static ssize_t
+mdt_enable_dir_migration_seq_write(struct file *file, const char __user *buffer,
+				   size_t count, loff_t *off)
 {
-        struct obd_device *obd = data;
-        struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
-
-        return snprintf(page, count, "%u\n", mdt_cos_is_enabled(mdt));
+	struct seq_file   *m = file->private_data;
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+	bool val;
+	int rc;
+
+	rc = kstrtobool_from_user(buffer, count, &val);
+	if (rc)
+		return rc;
+
+	mdt->mdt_enable_dir_migration = val;
+	return count;
 }
+LPROC_SEQ_FOPS(mdt_enable_dir_migration);
 
-static int lprocfs_wr_cos(struct file *file, const char *buffer,
-                                  unsigned long count, void *data)
+/**
+ * Show MDT async commit count.
+ *
+ * \param[in] m		seq_file handle
+ * \param[in] data	unused for single entry
+ *
+ * \retval		0 on success
+ * \retval		negative value on error
+ */
+static int mdt_async_commit_count_seq_show(struct seq_file *m, void *data)
 {
-        struct obd_device *obd = data;
-        struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
-        int val, rc;
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 
-        rc = lprocfs_write_helper(buffer, count, &val);
-        if (rc)
-                return rc;
-        mdt_enable_cos(mdt, val);
-        return count;
+	seq_printf(m, "%d\n", atomic_read(&mdt->mdt_async_commit_count));
+	return 0;
 }
 
-static int lprocfs_rd_root_squash(char *page, char **start, off_t off,
-                                  int count, int *eof, void *data)
+static ssize_t
+mdt_async_commit_count_seq_write(struct file *file, const char __user *buffer,
+				 size_t count, loff_t *off)
 {
-        struct obd_device *obd = data;
-        struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+	struct seq_file *m = file->private_data;
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+	int val;
+	int rc;
 
-        return snprintf(page, count, "%u:%u\n", mdt->mdt_squash_uid,
-                        mdt->mdt_squash_gid);
+	rc = kstrtoint_from_user(buffer, count, 0, &val);
+	if (rc)
+		return rc;
+
+	atomic_set(&mdt->mdt_async_commit_count, val);
+
+	return count;
 }
+LPROC_SEQ_FOPS(mdt_async_commit_count);
 
-static int safe_strtoul(const char *str, char **endp, unsigned long *res)
+/**
+ * Show MDT sync count.
+ *
+ * \param[in] m		seq_file handle
+ * \param[in] data	unused for single entry
+ *
+ * \retval		0 on success
+ * \retval		negative value on error
+ */
+static int mdt_sync_count_seq_show(struct seq_file *m, void *data)
 {
-        char n[24];
-
-        *res = simple_strtoul(str, endp, 0);
-        if (str == *endp)
-                return 1;
+	struct obd_device *obd = m->private;
+	struct lu_target *tgt = obd->u.obt.obt_lut;
 
-        sprintf(n, "%lu", *res);
-        if (strncmp(n, str, *endp - str))
-                /* overflow */
-                return 1;
-        return 0;
+	seq_printf(m, "%d\n", atomic_read(&tgt->lut_sync_count));
+	return 0;
 }
 
-static int lprocfs_wr_root_squash(struct file *file, const char *buffer,
-                                  unsigned long count, void *data)
+static ssize_t
+mdt_sync_count_seq_write(struct file *file, const char __user *buffer,
+			 size_t count, loff_t *off)
 {
-        struct obd_device *obd = data;
-        struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
-        int rc;
-        char kernbuf[50], *tmp, *end, *errmsg;
-        unsigned long uid, gid;
-        int nouid, nogid;
-        ENTRY;
-
-        if (count >= sizeof(kernbuf)) {
-                errmsg = "string too long";
-                GOTO(failed, rc = -EINVAL);
-        }
-        if (cfs_copy_from_user(kernbuf, buffer, count)) {
-                errmsg = "bad address";
-                GOTO(failed, rc = -EFAULT);
-        }
-        kernbuf[count] = '\0';
+	struct seq_file *m = file->private_data;
+	struct obd_device *obd = m->private;
+	struct lu_target *tgt = obd->u.obt.obt_lut;
+	int val;
+	int rc;
 
-        nouid = nogid = 0;
-        if (safe_strtoul(buffer, &tmp, &uid)) {
-                uid = mdt->mdt_squash_uid;
-                nouid = 1;
-        }
+	rc = kstrtoint_from_user(buffer, count, 0, &val);
+	if (rc)
+		return rc;
 
-        /* skip ':' */
-        if (*tmp == ':') {
-                tmp++;
-                if (safe_strtoul(tmp, &end, &gid)) {
-                        gid = mdt->mdt_squash_gid;
-                        nogid = 1;
-                }
-        } else {
-                gid = mdt->mdt_squash_gid;
-                nogid = 1;
-        }
+	atomic_set(&tgt->lut_sync_count, val);
+
+	return count;
+}
+LPROC_SEQ_FOPS(mdt_sync_count);
 
-        mdt->mdt_squash_uid = uid;
-        mdt->mdt_squash_gid = gid;
+static char *dom_open_lock_modes[NUM_DOM_LOCK_ON_OPEN_MODES] = {
+	[NO_DOM_LOCK_ON_OPEN] = "never",
+	[TRYLOCK_DOM_ON_OPEN] = "trylock",
+	[ALWAYS_DOM_LOCK_ON_OPEN] = "always",
+};
 
-        if (nouid && nogid) {
-                errmsg = "needs uid:gid format";
-                GOTO(failed, rc = -EINVAL);
-        }
+/* This must be longer than the longest string above */
+#define DOM_LOCK_MODES_MAXLEN 16
 
-        LCONSOLE_INFO("%s: root_squash is set to %u:%u\n",
-                      obd->obd_name,
-                      mdt->mdt_squash_uid,  mdt->mdt_squash_gid);
-        RETURN(count);
+/**
+ * Show MDT policy for data prefetch on open for DoM files..
+ *
+ * \param[in] m		seq_file handle
+ * \param[in] data	unused
+ *
+ * \retval		0 on success
+ * \retval		negative value on error
+ */
+static int mdt_dom_lock_seq_show(struct seq_file *m, void *data)
+{
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 
- failed:
-        CWARN("%s: failed to set root_squash to \"%s\", %s: rc %d\n",
-              obd->obd_name, buffer, errmsg, rc);
-        RETURN(rc);
+	seq_printf(m, "%s\n", dom_open_lock_modes[mdt->mdt_opts.mo_dom_lock]);
+	return 0;
 }
 
-static int lprocfs_rd_nosquash_nids(char *page, char **start, off_t off,
-                                    int count, int *eof, void *data)
+/**
+ * Change MDT policy for data prefetch on open for DoM files.
+ *
+ * This variable defines how DOM lock is taken at open enqueue.
+ * There are three possible modes:
+ * 1) never - never take DoM lock on open. DoM lock will be taken as separate
+ *    IO lock with own enqueue.
+ * 2) trylock - DoM lock will be taken only if non-blocked.
+ * 3) always - DoM lock will be taken always even if it is blocking lock.
+ *
+ * If dom_read_open is enabled too then DoM lock is taken in PR mode and
+ * is paired with LAYOUT lock when possible.
+ *
+ * \param[in] file	proc file
+ * \param[in] buffer	string which represents policy
+ * \param[in] count	\a buffer length
+ * \param[in] off	unused for single entry
+ *
+ * \retval		\a count on success
+ * \retval		negative number on error
+ */
+static ssize_t
+mdt_dom_lock_seq_write(struct file *file, const char __user *buffer,
+		       size_t count, loff_t *off)
 {
-        struct obd_device *obd = data;
-        struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
-
-        if (mdt->mdt_nosquash_str)
-                return snprintf(page, count, "%s\n", mdt->mdt_nosquash_str);
-        return snprintf(page, count, "NONE\n");
+	struct seq_file *m = file->private_data;
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+	char kernbuf[DOM_LOCK_MODES_MAXLEN];
+	int val = -1;
+	int i, rc;
+
+	if (count == 0 || count >= sizeof(kernbuf))
+		return -EINVAL;
+
+	if (copy_from_user(kernbuf, buffer, count))
+		return -EFAULT;
+
+	kernbuf[count] = 0;
+	if (kernbuf[count - 1] == '\n')
+		kernbuf[count - 1] = 0;
+
+	for (i = 0 ; i < NUM_DOM_LOCK_ON_OPEN_MODES; i++) {
+		if (strcmp(kernbuf, dom_open_lock_modes[i]) == 0) {
+			val = i;
+			break;
+		}
+	}
+
+	/* Legacy numeric codes */
+	if (val == -1) {
+		rc = kstrtoint_from_user(buffer, count, 0, &val);
+		if (rc)
+			return rc;
+	}
+
+	if (val < 0 || val >= NUM_DOM_LOCK_ON_OPEN_MODES)
+		return -EINVAL;
+
+	mdt->mdt_opts.mo_dom_lock = val;
+	return count;
 }
+LPROC_SEQ_FOPS(mdt_dom_lock);
 
-static int lprocfs_wr_nosquash_nids(struct file *file, const char *buffer,
-                                    unsigned long count, void *data)
+/**
+ * Show MDT policy for data prefetch on open for DoM files..
+ *
+ * \param[in] m		seq_file handle
+ * \param[in] data	unused
+ *
+ * \retval		0 on success
+ * \retval		negative value on error
+ */
+static int mdt_dom_read_open_seq_show(struct seq_file *m, void *data)
 {
-        struct obd_device *obd = data;
-        struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
-        int rc;
-        char *kernbuf, *errmsg;
-        cfs_list_t tmp;
-        ENTRY;
-
-        OBD_ALLOC(kernbuf, count + 1);
-        if (kernbuf == NULL) {
-                errmsg = "no memory";
-                GOTO(failed, rc = -ENOMEM);
-        }
-        if (cfs_copy_from_user(kernbuf, buffer, count)) {
-                errmsg = "bad address";
-                GOTO(failed, rc = -EFAULT);
-        }
-        kernbuf[count] = '\0';
-
-        if (!strcmp(kernbuf, "NONE") || !strcmp(kernbuf, "clear")) {
-                /* empty string is special case */
-                cfs_down_write(&mdt->mdt_squash_sem);
-                if (!cfs_list_empty(&mdt->mdt_nosquash_nids)) {
-                        cfs_free_nidlist(&mdt->mdt_nosquash_nids);
-                        OBD_FREE(mdt->mdt_nosquash_str,
-                                 mdt->mdt_nosquash_strlen);
-                        mdt->mdt_nosquash_str = NULL;
-                        mdt->mdt_nosquash_strlen = 0;
-                }
-                cfs_up_write(&mdt->mdt_squash_sem);
-                LCONSOLE_INFO("%s: nosquash_nids is cleared\n",
-                              obd->obd_name);
-                OBD_FREE(kernbuf, count + 1);
-                RETURN(count);
-        }
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 
-        CFS_INIT_LIST_HEAD(&tmp);
-        if (cfs_parse_nidlist(kernbuf, count, &tmp) <= 0) {
-                errmsg = "can't parse";
-                GOTO(failed, rc = -EINVAL);
-        }
+	seq_printf(m, "%u\n", !!mdt->mdt_opts.mo_dom_read_open);
+	return 0;
+}
 
-        cfs_down_write(&mdt->mdt_squash_sem);
-        if (!cfs_list_empty(&mdt->mdt_nosquash_nids)) {
-                cfs_free_nidlist(&mdt->mdt_nosquash_nids);
-                OBD_FREE(mdt->mdt_nosquash_str, mdt->mdt_nosquash_strlen);
-        }
-        mdt->mdt_nosquash_str = kernbuf;
-        mdt->mdt_nosquash_strlen = count + 1;
-        cfs_list_splice(&tmp, &mdt->mdt_nosquash_nids);
+/**
+ * Modify MDT policy for data prefetch on open for DoM files.
+ *
+ * If enabled then Data-on-MDT file data may be read during open and
+ * returned back in reply. It works only with mo_dom_lock enabled.
+ *
+ * \param[in] file	proc file
+ * \param[in] buffer	string which represents policy
+ * \param[in] count	\a buffer length
+ * \param[in] off	unused for single entry
+ *
+ * \retval		\a count on success
+ * \retval		negative number on error
+ */
+static ssize_t
+mdt_dom_read_open_seq_write(struct file *file, const char __user *buffer,
+			    size_t count, loff_t *off)
+{
+	struct seq_file *m = file->private_data;
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+	bool val;
+	int rc;
+
+	rc = kstrtobool_from_user(buffer, count, &val);
+	if (rc)
+		return rc;
+
+	mdt->mdt_opts.mo_dom_read_open = !!val;
+	return count;
+}
+LPROC_SEQ_FOPS(mdt_dom_read_open);
 
-        LCONSOLE_INFO("%s: nosquash_nids is set to %s\n",
-                      obd->obd_name, kernbuf);
-        cfs_up_write(&mdt->mdt_squash_sem);
-        RETURN(count);
+static int mdt_migrate_hsm_allowed_seq_show(struct seq_file *m, void *data)
+{
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 
- failed:
-        CWARN("%s: failed to set nosquash_nids to \"%s\", %s: rc %d\n",
-              obd->obd_name, kernbuf, errmsg, rc);
-        if (kernbuf)
-                OBD_FREE(kernbuf, count + 1);
-        RETURN(rc);
+	seq_printf(m, "%u\n",  (mdt->mdt_opts.mo_migrate_hsm_allowed != 0));
+	return 0;
 }
 
-static int lprocfs_rd_mdt_som(char *page, char **start, off_t off,
-                              int count, int *eof, void *data)
+static ssize_t
+mdt_migrate_hsm_allowed_seq_write(struct file *file, const char __user *buffer,
+				  size_t count, loff_t *off)
 {
-        struct obd_device *obd = data;
-        struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
-
-        return snprintf(page, count, "%sabled\n",
-                        mdt->mdt_som_conf ? "en" : "dis");
+	struct seq_file *m = file->private_data;
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+	bool val;
+	int rc;
+
+	rc = kstrtobool_from_user(buffer, count, &val);
+	if (rc)
+		return rc;
+
+	mdt->mdt_opts.mo_migrate_hsm_allowed = val;
+	return count;
 }
+LPROC_SEQ_FOPS(mdt_migrate_hsm_allowed);
 
-static int lprocfs_wr_mdt_som(struct file *file, const char *buffer,
-                              unsigned long count, void *data)
+static int mdt_readonly_seq_show(struct seq_file *m, void *data)
 {
-        struct obd_export *exp;
-        struct obd_device *obd = data;
-        struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
-        char kernbuf[16];
-        unsigned long val = 0;
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 
-        if (count > (sizeof(kernbuf) - 1))
-                return -EINVAL;
+	seq_printf(m, "%u\n", mdt->mdt_readonly);
+	return 0;
+}
 
-        if (cfs_copy_from_user(kernbuf, buffer, count))
-                return -EFAULT;
+static ssize_t
+mdt_readonly_seq_write(struct file *file, const char __user *buffer,
+		               size_t count, loff_t *off)
+{
+	struct seq_file   *m = file->private_data;
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+	bool val;
+	int rc;
+
+	rc = kstrtobool_from_user(buffer, count, &val);
+	if (rc)
+		return rc;
+
+	mdt->mdt_readonly = val;
+	return count;
+}
+LPROC_SEQ_FOPS(mdt_readonly);
 
-        kernbuf[count] = '\0';
+static int mdt_enable_remote_rename_seq_show(struct seq_file *m, void *data)
+{
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 
-        if (!strcmp(kernbuf, "enabled"))
-                val = 1;
-        else if (strcmp(kernbuf, "disabled"))
-                return -EINVAL;
+	seq_printf(m, "%u\n",  mdt->mdt_enable_remote_rename);
+	return 0;
+}
 
-        if (mdt->mdt_som_conf == val)
-                return count;
+static ssize_t
+mdt_enable_remote_rename_seq_write(struct file *file, const char __user *buffer,
+				   size_t count, loff_t *off)
+{
+	struct seq_file *m = file->private_data;
+	struct obd_device *obd = m->private;
+	struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+	bool val;
+	int rc;
+
+	rc = kstrtobool_from_user(buffer, count, &val);
+	if (rc)
+		return rc;
+
+	mdt->mdt_enable_remote_rename = val;
+	return count;
+}
+LPROC_SEQ_FOPS(mdt_enable_remote_rename);
+
+LPROC_SEQ_FOPS_RO_TYPE(mdt, recovery_status);
+LPROC_SEQ_FOPS_RO_TYPE(mdt, num_exports);
+LPROC_SEQ_FOPS_RO_TYPE(mdt, target_instance);
+LPROC_SEQ_FOPS_RO_TYPE(mdt, hash);
+LPROC_SEQ_FOPS_WR_ONLY(mdt, mds_evict_client);
+LPROC_SEQ_FOPS_RW_TYPE(mdt, job_interval);
+LPROC_SEQ_FOPS_RW_TYPE(mdt, ir_factor);
+LPROC_SEQ_FOPS_RW_TYPE(mdt, nid_stats_clear);
+LPROC_SEQ_FOPS(mdt_hsm_cdt_control);
+
+LPROC_SEQ_FOPS_RW_TYPE(mdt, recovery_time_hard);
+LPROC_SEQ_FOPS_RW_TYPE(mdt, recovery_time_soft);
+
+LPROC_SEQ_FOPS_RO(tgt_tot_dirty);
+LPROC_SEQ_FOPS_RO(tgt_tot_granted);
+LPROC_SEQ_FOPS_RO(tgt_tot_pending);
+LPROC_SEQ_FOPS(tgt_grant_compat_disable);
 
-        if (!obd->obd_process_conf) {
-                CERROR("Temporary SOM change is not supported, use lctl "
-                       "conf_param for permanent setting\n");
-                return count;
-        }
+static struct lprocfs_vars lprocfs_mdt_obd_vars[] = {
+	{ .name =	"tot_dirty",
+	  .fops =	&tgt_tot_dirty_fops		},
+	{ .name =	"tot_pending",
+	  .fops =	&tgt_tot_pending_fops		},
+	{ .name =	"tot_granted",
+	  .fops =	&tgt_tot_granted_fops		},
+	{ .name =	"grant_compat_disable",
+	  .fops =	&tgt_grant_compat_disable_fops	},
+	{ .name =	"recovery_status",
+	  .fops =	&mdt_recovery_status_fops		},
+	{ .name =	"num_exports",
+	  .fops =	&mdt_num_exports_fops			},
+	{ .name =	"identity_expire",
+	  .fops =	&mdt_identity_expire_fops		},
+	{ .name =	"identity_acquire_expire",
+	  .fops =	&mdt_identity_acquire_expire_fops	},
+	{ .name =	"identity_upcall",
+	  .fops =	&mdt_identity_upcall_fops		},
+	{ .name =	"identity_flush",
+	  .fops =	&mdt_identity_flush_fops		},
+	{ .name =	"identity_info",
+	  .fops =	&mdt_identity_info_fops			},
+	{ .name =	"site_stats",
+	  .fops =	&mdt_site_stats_fops			},
+	{ .name =	"evict_client",
+	  .fops =	&mdt_mds_evict_client_fops		},
+	{ .name =	"evict_tgt_nids",
+	  .fops =	&mdt_evict_tgt_nids_fops		},
+	{ .name =	"hash_stats",
+	  .fops =	&mdt_hash_fops				},
+	{ .name =	"commit_on_sharing",
+	  .fops =	&mdt_cos_fops				},
+	{ .name =	"root_squash",
+	  .fops =	&mdt_root_squash_fops			},
+	{ .name =	"nosquash_nids",
+	  .fops =	&mdt_nosquash_nids_fops			},
+	{ .name =	"instance",
+	  .fops =	&mdt_target_instance_fops		},
+	{ .name =	"ir_factor",
+	  .fops =	&mdt_ir_factor_fops			},
+	{ .name =	"job_cleanup_interval",
+	  .fops =	&mdt_job_interval_fops			},
+	{ .name =	"enable_remote_dir",
+	  .fops =	&mdt_enable_remote_dir_fops		},
+	{ .name =	"enable_remote_dir_gid",
+	  .fops =	&mdt_enable_remote_dir_gid_fops		},
+	{ .name =	"enable_striped_dir",
+	  .fops =	&mdt_enable_striped_dir_fops		},
+	{ .name =	"enable_dir_migration",
+	  .fops =	&mdt_enable_dir_migration_fops		},
+	{ .name =	"enable_remote_rename",
+	  .fops =	&mdt_enable_remote_rename_fops		},
+	{ .name =	"hsm_control",
+	  .fops =	&mdt_hsm_cdt_control_fops		},
+	{ .name =	"recovery_time_hard",
+	  .fops =	&mdt_recovery_time_hard_fops	},
+	{ .name =	"recovery_time_soft",
+	  .fops =	&mdt_recovery_time_soft_fops	},
+	{ .name =	"async_commit_count",
+	  .fops =	&mdt_async_commit_count_fops		},
+	{ .name =	"sync_count",
+	  .fops =	&mdt_sync_count_fops			},
+	{ .name =	"dom_lock",
+	  .fops =	&mdt_dom_lock_fops			},
+	{ .name =	"dom_read_open",
+	  .fops =	&mdt_dom_read_open_fops			},
+	{ .name =	"migrate_hsm_allowed",
+	  .fops =	&mdt_migrate_hsm_allowed_fops		},
+	{ .name =	"readonly",
+	  .fops =	&mdt_readonly_fops                      },
+	{ NULL }
+};
 
-        /* 1 stands for self export. */
-        cfs_list_for_each_entry(exp, &obd->obd_exports, exp_obd_chain) {
-                if (exp == obd->obd_self_export)
-                        continue;
-                if (exp->exp_connect_flags & OBD_CONNECT_MDS_MDS)
-                        continue;
-                /* Some clients are already connected, skip the change */
-                LCONSOLE_INFO("%s is already connected, SOM will be %s on "
-                              "the next mount\n", exp->exp_client_uuid.uuid,
-                              val ? "enabled" : "disabled");
-                return count;
-        }
+static int
+lprocfs_mdt_print_open_files(struct cfs_hash *hs, struct cfs_hash_bd *bd,
+			     struct hlist_node *hnode, void *v)
+{
+	struct obd_export	*exp = cfs_hash_object(hs, hnode);
+	struct seq_file		*seq = v;
+
+	if (exp->exp_lock_hash != NULL) {
+		struct mdt_export_data  *med = &exp->exp_mdt_data;
+		struct mdt_file_data	*mfd;
+
+		spin_lock(&med->med_open_lock);
+		list_for_each_entry(mfd, &med->med_open_head, mfd_list) {
+			seq_printf(seq, DFID"\n",
+				   PFID(mdt_object_fid(mfd->mfd_object)));
+		}
+		spin_unlock(&med->med_open_lock);
+	}
+
+	return 0;
+}
+
+static int lprocfs_mdt_open_files_seq_show(struct seq_file *seq, void *v)
+{
+	struct nid_stat *stats = seq->private;
+	struct obd_device *obd = stats->nid_obd;
 
-        mdt->mdt_som_conf = val;
-        LCONSOLE_INFO("Enabling SOM\n");
+	cfs_hash_for_each_key(obd->obd_nid_hash, &stats->nid,
+			      lprocfs_mdt_print_open_files, seq);
 
-        return count;
+	return 0;
 }
 
-/* Temporary; for testing purposes only */
-static int lprocfs_mdt_wr_mdc(struct file *file, const char *buffer,
-                              unsigned long count, void *data)
+int lprocfs_mdt_open_files_seq_open(struct inode *inode, struct file *file)
 {
-        struct obd_device *obd = data;
-        struct obd_export *exp = NULL;
-        struct obd_uuid uuid;
-        char tmpbuf[sizeof(struct obd_uuid)];
+	struct seq_file		*seq;
+	int			rc;
 
-        sscanf(buffer, "%40s", tmpbuf);
+	rc = single_open(file, &lprocfs_mdt_open_files_seq_show, NULL);
+	if (rc != 0)
+		return rc;
 
-        obd_str2uuid(&uuid, tmpbuf);
-        exp = cfs_hash_lookup(obd->obd_uuid_hash, &uuid);
-        if (exp == NULL) {
-                CERROR("%s: no export %s found\n",
-                       obd->obd_name, obd_uuid2str(&uuid));
-        } else {
-                mdt_hsm_copytool_send(exp);
-                class_export_put(exp);
-        }
+	seq = file->private_data;
+	seq->private = PDE_DATA(inode);
 
-        return count;
+	return 0;
 }
 
-static struct lprocfs_vars lprocfs_mdt_obd_vars[] = {
-        { "uuid",                       lprocfs_rd_uuid,                 0, 0 },
-        { "recovery_status",            lprocfs_obd_rd_recovery_status,  0, 0 },
-        { "num_exports",                lprocfs_rd_num_exports,          0, 0 },
-        { "identity_expire",            lprocfs_rd_identity_expire,
-                                        lprocfs_wr_identity_expire,         0 },
-        { "identity_acquire_expire",    lprocfs_rd_identity_acquire_expire,
-                                        lprocfs_wr_identity_acquire_expire, 0 },
-        { "identity_upcall",            lprocfs_rd_identity_upcall,
-                                        lprocfs_wr_identity_upcall,         0 },
-        { "identity_flush",             0, lprocfs_wr_identity_flush,       0 },
-        { "identity_info",              0, lprocfs_wr_identity_info,        0 },
-        { "capa",                       lprocfs_rd_capa,
-                                        lprocfs_wr_capa,                    0 },
-        { "capa_timeout",               lprocfs_rd_capa_timeout,
-                                        lprocfs_wr_capa_timeout,            0 },
-        { "capa_key_timeout",           lprocfs_rd_ck_timeout,
-                                        lprocfs_wr_ck_timeout,              0 },
-        { "capa_count",                 lprocfs_rd_capa_count,           0, 0 },
-        { "site_stats",                 lprocfs_rd_site_stats,           0, 0 },
-        { "evict_client",               0, lprocfs_mdt_wr_evict_client,     0 },
-        { "hash_stats",                 lprocfs_obd_rd_hash,    0, 0 },
-        { "sec_level",                  lprocfs_rd_sec_level,
-                                        lprocfs_wr_sec_level,               0 },
-        { "commit_on_sharing",          lprocfs_rd_cos, lprocfs_wr_cos, 0 },
-        { "root_squash",                lprocfs_rd_root_squash,
-                                        lprocfs_wr_root_squash,             0 },
-        { "nosquash_nids",              lprocfs_rd_nosquash_nids,
-                                        lprocfs_wr_nosquash_nids,           0 },
-        { "som",                        lprocfs_rd_mdt_som,
-                                        lprocfs_wr_mdt_som, 0 },
-        { "mdccomm",                    0, lprocfs_mdt_wr_mdc,              0 },
-        { "instance",                   lprocfs_target_rd_instance,         0 },
-        { "ir_factor",                  lprocfs_obd_rd_ir_factor,
-                                        lprocfs_obd_wr_ir_factor,           0 },
-        { 0 }
-};
+void mdt_counter_incr(struct ptlrpc_request *req, int opcode)
+{
+	struct obd_export *exp = req->rq_export;
+
+	if (exp->exp_obd && exp->exp_obd->obd_md_stats)
+		lprocfs_counter_incr(exp->exp_obd->obd_md_stats,
+				     opcode + LPROC_MD_LAST_OPC);
+	if (exp->exp_nid_stats && exp->exp_nid_stats->nid_stats != NULL)
+		lprocfs_counter_incr(exp->exp_nid_stats->nid_stats, opcode);
+	if (exp->exp_obd && exp->exp_obd->u.obt.obt_jobstats.ojs_hash &&
+	    (exp_connect_flags(exp) & OBD_CONNECT_JOBSTATS))
+		lprocfs_job_stats_log(exp->exp_obd,
+				      lustre_msg_get_jobid(req->rq_reqmsg),
+				      opcode, 1);
+}
 
-static struct lprocfs_vars lprocfs_mdt_module_vars[] = {
-        { "num_refs",                   lprocfs_rd_numrefs,              0, 0 },
-        { 0 }
+static const char * const mdt_stats[] = {
+	[LPROC_MDT_OPEN]		= "open",
+	[LPROC_MDT_CLOSE]		= "close",
+	[LPROC_MDT_MKNOD]		= "mknod",
+	[LPROC_MDT_LINK]		= "link",
+	[LPROC_MDT_UNLINK]		= "unlink",
+	[LPROC_MDT_MKDIR]		= "mkdir",
+	[LPROC_MDT_RMDIR]		= "rmdir",
+	[LPROC_MDT_RENAME]		= "rename",
+	[LPROC_MDT_GETATTR]		= "getattr",
+	[LPROC_MDT_SETATTR]		= "setattr",
+	[LPROC_MDT_GETXATTR]		= "getxattr",
+	[LPROC_MDT_SETXATTR]		= "setxattr",
+	[LPROC_MDT_STATFS]		= "statfs",
+	[LPROC_MDT_SYNC]		= "sync",
+	[LPROC_MDT_SAMEDIR_RENAME]	= "samedir_rename",
+	[LPROC_MDT_CROSSDIR_RENAME]	= "crossdir_rename",
+	[LPROC_MDT_IO_READ]		= "read_bytes",
+	[LPROC_MDT_IO_WRITE]		= "write_bytes",
+	[LPROC_MDT_IO_PUNCH]		= "punch",
 };
 
-void lprocfs_mdt_init_vars(struct lprocfs_static_vars *lvars)
+void mdt_stats_counter_init(struct lprocfs_stats *stats)
 {
-    lvars->module_vars  = lprocfs_mdt_module_vars;
-    lvars->obd_vars     = lprocfs_mdt_obd_vars;
+	int idx;
+
+	LASSERT(stats && stats->ls_num >= ARRAY_SIZE(mdt_stats));
+
+	for (idx = 0; idx < ARRAY_SIZE(mdt_stats); idx++) {
+		int flags = 0;
+
+		if (idx == LPROC_MDT_IO_WRITE || idx == LPROC_MDT_IO_READ)
+			flags = LPROCFS_CNTR_AVGMINMAX;
+
+		lprocfs_counter_init(stats, idx, flags, mdt_stats[idx], "reqs");
+	}
 }
 
-void mdt_counter_incr(struct obd_export *exp, int opcode)
+int mdt_procfs_init(struct mdt_device *mdt, const char *name)
 {
-        if (exp->exp_obd && exp->exp_obd->md_stats)
-                lprocfs_counter_incr(exp->exp_obd->md_stats, opcode);
-        if (exp->exp_nid_stats && exp->exp_nid_stats->nid_stats != NULL)
-                lprocfs_counter_incr(exp->exp_nid_stats->nid_stats, opcode);
-
+	struct obd_device *obd = mdt2obd_dev(mdt);
+	int rc;
+	int i;
+
+	ENTRY;
+	LASSERT(name != NULL);
+
+	obd->obd_vars = lprocfs_mdt_obd_vars;
+	rc = lprocfs_obd_setup(obd, true);
+	if (rc) {
+		CERROR("%s: cannot create proc entries: rc = %d\n",
+		       mdt_obd_name(mdt), rc);
+		return rc;
+	}
+
+	rc = tgt_tunables_init(&mdt->mdt_lut);
+	if (rc) {
+		CERROR("%s: failed to init target tunables: rc = %d\n",
+		       mdt_obd_name(mdt), rc);
+		return rc;
+	}
+
+	rc = hsm_cdt_procfs_init(mdt);
+	if (rc) {
+		CERROR("%s: cannot create hsm proc entries: rc = %d\n",
+		       mdt_obd_name(mdt), rc);
+		return rc;
+	}
+
+	obd->obd_proc_exports_entry = proc_mkdir("exports",
+						 obd->obd_proc_entry);
+	if (obd->obd_proc_exports_entry)
+		lprocfs_add_simple(obd->obd_proc_exports_entry, "clear",
+				   obd, &mdt_nid_stats_clear_fops);
+
+	rc = lprocfs_alloc_md_stats(obd, ARRAY_SIZE(mdt_stats));
+	if (rc)
+		return rc;
+
+	/* add additional MDT md_stats after the default ones */
+	for (i = 0; i < ARRAY_SIZE(mdt_stats); i++) {
+		int idx = i + LPROC_MD_LAST_OPC;
+		int flags = 0;
+
+		if (idx == LPROC_MDT_IO_WRITE || idx == LPROC_MDT_IO_READ)
+			flags = LPROCFS_CNTR_AVGMINMAX;
+
+		lprocfs_counter_init(obd->obd_md_stats, idx, flags,
+				     mdt_stats[i], "reqs");
+	}
+
+	rc = lprocfs_job_stats_init(obd, ARRAY_SIZE(mdt_stats),
+				    mdt_stats_counter_init);
+
+	rc = lproc_mdt_attach_rename_seqstat(mdt);
+	if (rc)
+		CERROR("%s: MDT can not create rename stats rc = %d\n",
+		       mdt_obd_name(mdt), rc);
+
+	RETURN(rc);
 }
 
-void mdt_stats_counter_init(struct lprocfs_stats *stats)
+void mdt_procfs_fini(struct mdt_device *mdt)
 {
-        lprocfs_counter_init(stats, LPROC_MDT_OPEN, 0, "open", "reqs");
-        lprocfs_counter_init(stats, LPROC_MDT_CLOSE, 0, "close", "reqs");
-        lprocfs_counter_init(stats, LPROC_MDT_MKNOD, 0, "mknod", "reqs");
-        lprocfs_counter_init(stats, LPROC_MDT_LINK, 0, "link", "reqs");
-        lprocfs_counter_init(stats, LPROC_MDT_UNLINK, 0, "unlink", "reqs");
-        lprocfs_counter_init(stats, LPROC_MDT_MKDIR, 0, "mkdir", "reqs");
-        lprocfs_counter_init(stats, LPROC_MDT_RMDIR, 0, "rmdir", "reqs");
-        lprocfs_counter_init(stats, LPROC_MDT_RENAME, 0, "rename", "reqs");
-        lprocfs_counter_init(stats, LPROC_MDT_GETATTR, 0, "getattr", "reqs");
-        lprocfs_counter_init(stats, LPROC_MDT_SETATTR, 0, "setattr", "reqs");
-        lprocfs_counter_init(stats, LPROC_MDT_GETXATTR, 0, "getxattr", "reqs");
-        lprocfs_counter_init(stats, LPROC_MDT_SETXATTR, 0, "setxattr", "reqs");
-        lprocfs_counter_init(stats, LPROC_MDT_STATFS, 0, "statfs", "reqs");
-        lprocfs_counter_init(stats, LPROC_MDT_SYNC, 0, "sync", "reqs");
-        lprocfs_counter_init(stats, LPROC_MDT_SAMEDIR_RENAME, 0,
-                             "samedir_rename", "reqs");
-        lprocfs_counter_init(stats, LPROC_MDT_CROSSDIR_RENAME, 0,
-                             "crossdir_rename", "reqs");
+	struct obd_device *obd = mdt2obd_dev(mdt);
+
+	if (obd->obd_proc_exports_entry != NULL) {
+		lprocfs_remove_proc_entry("clear", obd->obd_proc_exports_entry);
+		obd->obd_proc_exports_entry = NULL;
+	}
+
+	lprocfs_free_per_client_stats(obd);
+	hsm_cdt_procfs_fini(mdt);
+	tgt_tunables_fini(&mdt->mdt_lut);
+	lprocfs_obd_cleanup(obd);
+	lprocfs_free_md_stats(obd);
+	lprocfs_free_obd_stats(obd);
+	lprocfs_job_stats_fini(obd);
 }