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LU-5396 lod: (and mdt, mgs) make some symbols static
[fs/lustre-release.git] / lustre / mdt / mdt_lproc.c
index 171c77a..c7295cb 100644 (file)
@@ -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.
  * GPL HEADER END
  */
 /*
- * Copyright  2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2014, Intel Corporation.
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
  * 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 <lnet/nidstr.h>
 /* LUSTRE_VERSION_CODE */
 #include <lustre_ver.h>
 /*
 #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"
 
-static const char *mdt_proc_names[LPROC_MDT_NR] = {
-};
+/**
+ * The rename stats output would be YAML formats, like
+ * rename_stats:
+ * - snapshot_time: 1234567890.123456
+ * - same_dir:
+ *     4kB: { samples: 1230, pct: 33, cum_pct: 45 }
+ *     8kB: { samples: 1242, pct: 33, cum_pct: 78 }
+ *     16kB: { samples: 132, pct: 3, cum_pct: 81 }
+ * - crossdir_src:
+ *     4kB: { samples: 123, pct: 33, cum_pct: 45 }
+ *     8kB: { samples: 124, pct: 33, cum_pct: 78 }
+ *     16kB: { samples: 12, pct: 3, cum_pct: 81 }
+ * - crossdir_tgt:
+ *     4kB: { samples: 123, pct: 33, cum_pct: 45 }
+ *     8kB: { samples: 124, pct: 33, cum_pct: 78 }
+ *     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)
+{
+        unsigned long tot, t, cum = 0;
+        int i;
+
+        tot = lprocfs_oh_sum(hist);
+        if (tot > 0)
+                seq_printf(seq, "- %-15s\n", name);
+        /* dir size start from 4K, start i from 10(2^10) here */
+        for (i = 0; i < OBD_HIST_MAX; i++) {
+                t = hist->oh_buckets[i];
+                cum += t;
+                if (cum == 0)
+                        continue;
+
+                if (i < 10)
+                        seq_printf(seq, "%6s%d%s", " ", 1<< i, "bytes:");
+                else if (i < 20)
+                        seq_printf(seq, "%6s%d%s", " ", 1<<(i-10), "KB:");
+                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));
+
+                if (cum == tot)
+                        break;
+        }
+}
 
-int mdt_procfs_init(struct mdt_device *mdt, const char *name)
+static void rename_stats_show(struct seq_file *seq,
+                              struct rename_stats *rename_stats)
 {
-        struct lu_device *ld = &mdt->mdt_md_dev.md_lu_dev;
-        int result;
-        ENTRY;
+        struct timeval 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);
+
+        display_rename_stats(seq, "same_dir",
+                             &rename_stats->hist[RENAME_SAMEDIR_SIZE]);
+        display_rename_stats(seq, "crossdir_src",
+                             &rename_stats->hist[RENAME_CROSSDIR_SRC_SIZE]);
+        display_rename_stats(seq, "crossdir_tgt",
+                             &rename_stats->hist[RENAME_CROSSDIR_TGT_SIZE]);
+}
+
+#undef pct
 
-        LASSERT(name != NULL);
-        mdt->mdt_proc_entry = ld->ld_obd->obd_proc_entry;
-        LASSERT(mdt->mdt_proc_entry != NULL);
+static int mdt_rename_stats_seq_show(struct seq_file *seq, void *v)
+{
+        struct mdt_device *mdt = seq->private;
 
-        result = lu_time_init(&mdt->mdt_stats, mdt->mdt_proc_entry,
-                              mdt_proc_names, ARRAY_SIZE(mdt_proc_names));
-        if (result == 0)
-                result = lu_time_named_init(&ld->ld_site->ls_time_stats,
-                                            "site_time", mdt->mdt_proc_entry,
-                                            lu_time_names,
-                                            ARRAY_SIZE(lu_time_names));
-        RETURN(result);
+        rename_stats_show(seq, &mdt->mdt_rename_stats);
+
+        return 0;
 }
 
-int mdt_procfs_fini(struct mdt_device *mdt)
+static ssize_t
+mdt_rename_stats_seq_write(struct file *file, const char __user *buf,
+                          size_t len, loff_t *off)
 {
-        struct lu_device *ld = &mdt->mdt_md_dev.md_lu_dev;
-        lu_time_fini(&ld->ld_site->ls_time_stats);
-        lu_time_fini(&mdt->mdt_stats);
-        mdt->mdt_proc_entry = NULL;
-        RETURN(0);
+        struct seq_file *seq = file->private_data;
+        struct mdt_device *mdt = seq->private;
+        int i;
+
+        for (i = 0; i < RENAME_LAST; i++)
+                lprocfs_oh_clear(&mdt->mdt_rename_stats.hist[i]);
+
+        return len;
 }
+LPROC_SEQ_FOPS(mdt_rename_stats);
 
-void mdt_time_start(const struct mdt_thread_info *info)
+static int lproc_mdt_attach_rename_seqstat(struct mdt_device *mdt)
 {
-        lu_lprocfs_time_start(info->mti_env);
+       int i;
+
+       for (i = 0; i < RENAME_LAST; i++)
+               spin_lock_init(&mdt->mdt_rename_stats.hist[i].oh_lock);
+
+       return lprocfs_obd_seq_create(mdt2obd_dev(mdt), "rename_stats", 0644,
+                                     &mdt_rename_stats_fops, mdt);
 }
 
-void mdt_time_end(const struct mdt_thread_info *info, int idx)
+void mdt_rename_counter_tally(struct mdt_thread_info *info,
+                             struct mdt_device *mdt,
+                             struct ptlrpc_request *req,
+                             struct mdt_object *src,
+                             struct mdt_object *tgt)
 {
-        lu_lprocfs_time_end(info->mti_env, info->mti_mdt->mdt_stats, idx);
+        struct md_attr *ma = &info->mti_attr;
+        struct rename_stats *rstats = &mdt->mdt_rename_stats;
+        int rc;
+
+        ma->ma_need = MA_INODE;
+        ma->ma_valid = 0;
+        rc = mo_attr_get(info->mti_env, mdt_object_child(src), ma);
+        if (rc) {
+                CERROR("%s: "DFID" attr_get, rc = %d\n",
+                      mdt_obd_name(mdt), PFID(mdt_object_fid(src)), rc);
+                return;
+        }
+
+        if (src == tgt) {
+               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(req, LPROC_MDT_CROSSDIR_RENAME);
+        lprocfs_oh_tally_log2(&rstats->hist[RENAME_CROSSDIR_SRC_SIZE],
+                              (unsigned int)ma->ma_attr.la_size);
+
+        ma->ma_need = MA_INODE;
+        ma->ma_valid = 0;
+        rc = mo_attr_get(info->mti_env, mdt_object_child(tgt), ma);
+        if (rc) {
+                CERROR("%s: "DFID" attr_get, rc = %d\n",
+                      mdt_obd_name(mdt), PFID(mdt_object_fid(tgt)), rc);
+                return;
+        }
+
+        lprocfs_oh_tally_log2(&rstats->hist[RENAME_CROSSDIR_TGT_SIZE],
+                              (unsigned int)ma->ma_attr.la_size);
 }
 
-static int lprocfs_rd_identity_expire(char *page, char **start, off_t off,
-                                      int count, int *eof, void *data)
+static int mdt_identity_expire_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);
 
-        *eof = 1;
-        return snprintf(page, count, "%lu\n",
-                        mdt->mdt_identity_cache->uc_entry_expire / HZ);
+       return seq_printf(m, "%u\n", mdt->mdt_identity_cache->uc_entry_expire);
 }
 
-static int lprocfs_wr_identity_expire(struct file *file, const char *buffer,
-                                      unsigned long count, void *data)
+static ssize_t
+mdt_identity_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);
-        int rc, val;
+       struct seq_file   *m = file->private_data;
+       struct obd_device *obd = m->private;
+       struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+       int rc, val;
 
-        rc = lprocfs_write_helper(buffer, count, &val);
-        if (rc)
-                return rc;
+       rc = lprocfs_write_helper(buffer, count, &val);
+       if (rc)
+               return rc;
 
-        mdt->mdt_identity_cache->uc_entry_expire = val * HZ;
-        return count;
+       mdt->mdt_identity_cache->uc_entry_expire = val;
+       return count;
 }
+LPROC_SEQ_FOPS(mdt_identity_expire);
 
-static int lprocfs_rd_identity_acquire_expire(char *page, char **start,
-                                              off_t off, int count, int *eof,
-                                              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);
+       struct obd_device *obd = m->private;
+       struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 
-        *eof = 1;
-        return snprintf(page, count, "%lu\n",
-                        mdt->mdt_identity_cache->uc_acquire_expire / HZ);
+       return seq_printf(m, "%u\n", mdt->mdt_identity_cache->uc_acquire_expire);
 }
 
-static int lprocfs_wr_identity_acquire_expire(struct file *file,
-                                              const char *buffer,
-                                              unsigned long count,
-                                              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);
-        int rc, val;
+       struct seq_file   *m = file->private_data;
+       struct obd_device *obd = m->private;
+       struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+       int rc, val;
 
-        rc = lprocfs_write_helper(buffer, count, &val);
-        if (rc)
-                return rc;
+       rc = lprocfs_write_helper(buffer, count, &val);
+       if (rc)
+               return rc;
 
-        mdt->mdt_identity_cache->uc_acquire_expire = val * HZ;
-        return count;
+       mdt->mdt_identity_cache->uc_acquire_expire = val;
+       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;
+       struct obd_device *obd = m->private;
+       struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+       struct upcall_cache *hash = mdt->mdt_identity_cache;
+
+       read_lock(&hash->uc_upcall_rwlock);
+       seq_printf(m, "%s\n", hash->uc_upcall);
+       read_unlock(&hash->uc_upcall_rwlock);
+       return 0;
+}
 
-        *eof = 1;
-        read_lock(&hash->uc_upcall_rwlock);
-        len = snprintf(page, count, "%s\n", hash->uc_upcall);
-        read_unlock(&hash->uc_upcall_rwlock);
-        return len;
+static ssize_t
+mdt_identity_upcall_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 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) */
+       write_lock(&hash->uc_upcall_rwlock);
+       sscanf(kernbuf, "%s", hash->uc_upcall);
+       write_unlock(&hash->uc_upcall_rwlock);
+
+       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);
 }
+LPROC_SEQ_FOPS(mdt_identity_upcall);
 
-static int lprocfs_wr_identity_upcall(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);
-        struct upcall_cache *hash = mdt->mdt_identity_cache;
-        char kernbuf[UC_CACHE_UPCALL_MAXPATH] = { '\0' };
+       struct seq_file   *m = file->private_data;
+       struct obd_device *obd = m->private;
+       struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+       int rc, uid;
 
-        if (count >= UC_CACHE_UPCALL_MAXPATH) {
-                CERROR("%s: identity upcall too long\n", obd->obd_name);
-                return -EINVAL;
-        }
+       rc = lprocfs_write_helper(buffer, count, &uid);
+       if (rc)
+               return rc;
 
-        if (copy_from_user(kernbuf, buffer, min_t(unsigned long, count,
-                                                  UC_CACHE_UPCALL_MAXPATH - 1)))
-                return -EFAULT;
+       mdt_flush_identity(mdt->mdt_identity_cache, uid);
+       return count;
+}
+LPROC_SEQ_FOPS_WO_TYPE(mdt, identity_flush);
 
-        /* Remove any extraneous bits from the upcall (e.g. linefeeds) */
-        write_lock(&hash->uc_upcall_rwlock);
-        sscanf(kernbuf, "%s", hash->uc_upcall);
-        write_unlock(&hash->uc_upcall_rwlock);
+static ssize_t
+lprocfs_identity_info_seq_write(struct file *file, const char __user *buffer,
+                               size_t count, void *data)
+{
+       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",
+                      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);
 
-        if (strcmp(hash->uc_name, obd->obd_name) != 0)
-                CWARN("%s: write to upcall name %s\n",
-                      obd->obd_name, hash->uc_upcall);
+out:
+       if (param != NULL)
+               OBD_FREE(param, size);
 
-        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);
+       return rc ? rc : count;
+}
+LPROC_SEQ_FOPS_WO_TYPE(mdt, identity_info);
 
-        CWARN("%s: identity upcall set to %s\n", obd->obd_name, hash->uc_upcall);
-        return count;
+/* for debug only */
+static int mdt_capa_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 seq_printf(m, "capability on: %s %s\n",
+                         mdt->mdt_lut.lut_oss_capa ? "oss" : "",
+                         mdt->mdt_lut.lut_mds_capa ? "mds" : "");
 }
 
-static int lprocfs_wr_identity_flush(struct file *file, const char *buffer,
-                                     unsigned long count, void *data)
+static ssize_t
+mdt_capa_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, uid;
+       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, rc;
+
+       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;
+       }
+
+       /* 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;
+       }
+
+       spin_lock(&mdt->mdt_lut.lut_flags_lock);
+       mdt->mdt_lut.lut_oss_capa = !!(val & 0x1);
+       mdt->mdt_lut.lut_mds_capa = !!(val & 0x2);
+       spin_unlock(&mdt->mdt_lut.lut_flags_lock);
+       mdt->mdt_capa_conf = 1;
+       LCONSOLE_INFO("MDS %s %s MDS fid capability.\n",
+                     mdt_obd_name(mdt),
+                     mdt->mdt_lut.lut_mds_capa ? "enabled" : "disabled");
+       LCONSOLE_INFO("MDS %s %s OSS fid capability.\n",
+                     mdt_obd_name(mdt),
+                     mdt->mdt_lut.lut_oss_capa ? "enabled" : "disabled");
+       return count;
+}
+LPROC_SEQ_FOPS(mdt_capa);
 
-        rc = lprocfs_write_helper(buffer, count, &uid);
-        if (rc)
-                return rc;
+static int mdt_capa_count_seq_show(struct seq_file *m, void *data)
+{
+       return seq_printf(m, "%d %d\n", capa_count[CAPA_SITE_CLIENT],
+                         capa_count[CAPA_SITE_SERVER]);
+}
+LPROC_SEQ_FOPS_RO(mdt_capa_count);
 
-        mdt_flush_identity(mdt->mdt_identity_cache, uid);
-        return count;
+static int mdt_site_stats_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 lu_site_stats_seq_print(mdt_lu_site(mdt), m);
 }
+LPROC_SEQ_FOPS_RO(mdt_site_stats);
 
-static int lprocfs_wr_identity_info(struct file *file, const char *buffer,
-                                    unsigned long count, void *data)
+static int mdt_capa_timeout_seq_show(struct seq_file *m, void *data)
 {
-        struct obd_device *obd = data;
-        struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
-        struct identity_downcall_data sparam, *param = &sparam;
-        int size = 0, rc = 0;
+       struct obd_device *obd = m->private;
+       struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 
-        if (count < sizeof(*param)) {
-                CERROR("%s: invalid data size %lu\n", obd->obd_name, count);
-                return count;
-        }
+       return seq_printf(m, "%lu\n", mdt->mdt_capa_timeout);
+}
 
-        if (copy_from_user(&sparam, buffer, sizeof(sparam))) {
-                CERROR("%s: bad identity data\n", obd->obd_name);
-                GOTO(out, rc = -EFAULT);
-        }
+static ssize_t
+mdt_capa_timeout_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);
+       int val, rc;
+
+       rc = lprocfs_write_helper(buffer, count, &val);
+       if (rc)
+               return rc;
+
+       mdt->mdt_capa_timeout = (unsigned long)val;
+       mdt->mdt_capa_conf = 1;
+       return count;
+}
+LPROC_SEQ_FOPS(mdt_capa_timeout);
 
-        if (sparam.idd_magic != IDENTITY_DOWNCALL_MAGIC) {
-                CERROR("%s: MDS identity downcall bad params\n", obd->obd_name);
-                GOTO(out, rc = -EINVAL);
-        }
+static int mdt_ck_timeout_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 (sparam.idd_nperms > N_PERMS_MAX) {
-                CERROR("%s: perm count %d more than maximum %d\n",
-                       obd->obd_name, sparam.idd_nperms, N_PERMS_MAX);
-                GOTO(out, rc = -EINVAL);
-        }
+       return seq_printf(m, "%lu\n", mdt->mdt_ck_timeout);
+}
+
+static ssize_t
+mdt_ck_timeout_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);
+       int val, rc;
+
+       rc = lprocfs_write_helper(buffer, count, &val);
+       if (rc)
+               return rc;
+
+       mdt->mdt_ck_timeout = (unsigned long)val;
+       mdt->mdt_capa_conf = 1;
+       return count;
+}
+LPROC_SEQ_FOPS(mdt_ck_timeout);
 
-        if (sparam.idd_ngroups > NGROUPS_MAX) {
-                CERROR("%s: group count %d more than maximum %d\n",
-                       obd->obd_name, sparam.idd_ngroups, NGROUPS_MAX);
-                GOTO(out, rc = -EINVAL);
+#define BUFLEN (UUID_MAX + 4)
+
+static ssize_t
+lprocfs_mds_evict_client_seq_write(struct file *file,
+                                  const char __user *buffer,
+                                  size_t count, loff_t *off)
+{
+       char *kbuf;
+       char *tmpbuf;
+
+        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, buffer,
+                          min_t(unsigned long, BUFLEN - 1, count))) {
+                count = -EFAULT;
+                goto out;
         }
+        tmpbuf = cfs_firststr(kbuf, min_t(unsigned long, BUFLEN - 1, count));
 
-        if (sparam.idd_ngroups) {
-                size = offsetof(struct identity_downcall_data,
-                                idd_groups[sparam.idd_ngroups]);
-                OBD_ALLOC(param, size);
-                if (!param) {
-                        CERROR("%s: fail to alloc %d bytes for uid %u"
-                               " with %d groups\n", obd->obd_name, size,
-                               sparam.idd_uid, sparam.idd_ngroups);
-                        param = &sparam;
-                        param->idd_ngroups = 0;
-                } else if (copy_from_user(param, buffer, size)) {
-                        CERROR("%s: uid %u bad supplementary group data\n",
-                               obd->obd_name, sparam.idd_uid);
-                        OBD_FREE(param, size);
-                        param = &sparam;
-                        param->idd_ngroups = 0;
-                }
+        if (strncmp(tmpbuf, "nid:", 4) != 0) {
+               count = lprocfs_evict_client_seq_write(file, buffer, count,
+                                                      off);
+                goto out;
         }
 
-        rc = upcall_cache_downcall(mdt->mdt_identity_cache, param->idd_err,
-                                   param->idd_uid, param);
+        CERROR("NOT implement evict client by nid %s\n", tmpbuf);
 
 out:
-        if (param && (param != &sparam))
-                OBD_FREE(param, size);
-
-        return rc ?: count;
+        OBD_FREE(kbuf, BUFLEN);
+        return count;
 }
 
-/* for debug only */
-static int lprocfs_rd_capa(char *page, char **start, off_t off,
-                           int count, int *eof, void *data)
+#undef BUFLEN
+
+static int mdt_sec_level_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 seq_printf(m, "%d\n", mdt->mdt_lut.lut_sec_level);
 }
 
-static int lprocfs_wr_capa(struct file *file, const char *buffer,
-                           unsigned long count, void *data)
+static ssize_t
+mdt_sec_level_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 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);
+       int val, rc;
 
         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");
+        if (val > LUSTRE_SEC_ALL || val < LUSTRE_SEC_NONE)
                 return -EINVAL;
-        }
 
-        /* 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");
+        if (val == LUSTRE_SEC_SPECIFY) {
+                CWARN("security level %d will be supported in future.\n",
+                      LUSTRE_SEC_SPECIFY);
                 return -EINVAL;
         }
 
-        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;
+       mdt->mdt_lut.lut_sec_level = val;
+       return count;
+}
+LPROC_SEQ_FOPS(mdt_sec_level);
+
+static int mdt_cos_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 seq_printf(m, "%u\n", mdt_cos_is_enabled(mdt));
 }
 
-static int lprocfs_rd_capa_count(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)
 {
-        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);
+       int val, rc;
+
+       rc = lprocfs_write_helper(buffer, count, &val);
+       if (rc)
+               return rc;
+       mdt_enable_cos(mdt, val);
+       return count;
 }
+LPROC_SEQ_FOPS(mdt_cos);
 
-static int lprocfs_rd_site_stats(char *page, char **start, off_t off,
-                                 int count, int *eof, 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);
+       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 lu_site_stats_print(mdt_lu_site(mdt), page, count);
+       return seq_printf(m, "%u:%u\n", squash->rsi_uid,
+                         squash->rsi_gid);
 }
 
-static int lprocfs_rd_capa_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_capa_timeout);
+       return lprocfs_wr_root_squash(buffer, count, squash,
+                                     mdt_obd_name(mdt));
 }
+LPROC_SEQ_FOPS(mdt_root_squash);
 
-static int lprocfs_wr_capa_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, rc;
+
+       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;
+               rc = seq_printf(m, "\n");
+       } else
+               rc = seq_printf(m, "NONE\n");
+       up_read(&squash->rsi_sem);
+
+       return rc;
+}
 
-        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_capa_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_rd_ck_timeout(char *page, char **start, off_t off, int count,
-                                 int *eof, void *data)
+static int mdt_som_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, "%lu\n", mdt->mdt_ck_timeout);
+       return seq_printf(m, "%sabled\n",
+                         mdt->mdt_som_conf ? "en" : "dis");
 }
 
-static int lprocfs_wr_ck_timeout(struct file *file, const char *buffer,
-                                 unsigned long count, void *data)
+static ssize_t
+mdt_som_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 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);
+       struct obd_export *exp;
+       char kernbuf[16];
+       unsigned long val = 0;
+
+        if (count > (sizeof(kernbuf) - 1))
+                return -EINVAL;
 
-        rc = lprocfs_write_helper(buffer, count, &val);
-        if (rc)
-                return rc;
+       if (copy_from_user(kernbuf, buffer, count))
+                return -EFAULT;
+
+        kernbuf[count] = '\0';
+
+        if (!strcmp(kernbuf, "enabled"))
+                val = 1;
+        else if (strcmp(kernbuf, "disabled"))
+                return -EINVAL;
+
+        if (mdt->mdt_som_conf == val)
+                return count;
+
+        if (!obd->obd_process_conf) {
+                CERROR("Temporary SOM change is not supported, use lctl "
+                       "conf_param for permanent setting\n");
+                return count;
+        }
+
+       /* 1 stands for self export. */
+       list_for_each_entry(exp, &obd->obd_exports, exp_obd_chain) {
+               if (exp == obd->obd_self_export)
+                       continue;
+               if (exp_connect_flags(exp) & 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;
+        }
+
+        mdt->mdt_som_conf = val;
+        LCONSOLE_INFO("Enabling SOM\n");
 
-        mdt->mdt_ck_timeout = (unsigned long)val;
-        mdt->mdt_capa_conf = 1;
         return count;
 }
+LPROC_SEQ_FOPS(mdt_som);
 
-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);
+       return seq_printf(m, "%u\n", mdt->mdt_enable_remote_dir);
+}
 
-        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);
+       __u32 val;
+       int rc;
 
-        CERROR("NOT implement evict client by nid %s\n", tmpbuf);
+       rc = lprocfs_write_helper(buffer, count, &val);
+       if (rc)
+               return rc;
 
-        return count;
+       if (val > 1)
+               return -ERANGE;
+
+       mdt->mdt_enable_remote_dir = val;
+       return count;
 }
+LPROC_SEQ_FOPS(mdt_enable_remote_dir);
 
-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 },
-        { 0 }
-};
+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 seq_printf(m, "%d\n",
+                         (int)mdt->mdt_enable_remote_dir_gid);
+}
 
-static struct lprocfs_vars lprocfs_mdt_module_vars[] = {
-        { "num_refs",                   lprocfs_rd_numrefs,              0, 0 },
-        { 0 }
+static ssize_t
+mdt_enable_remote_dir_gid_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);
+       __u32 val;
+       int rc;
+
+       rc = lprocfs_write_helper(buffer, count, &val);
+       if (rc)
+               return rc;
+
+       mdt->mdt_enable_remote_dir_gid = val;
+       return count;
+}
+LPROC_SEQ_FOPS(mdt_enable_remote_dir_gid);
+
+LPROC_SEQ_FOPS_RO_TYPE(mdt, uuid);
+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_WO_TYPE(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);
+
+static struct lprocfs_seq_vars lprocfs_mdt_obd_vars[] = {
+       { .name =       "uuid",
+         .fops =       &mdt_uuid_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 =       "capa",
+         .fops =       &mdt_capa_fops                          },
+       { .name =       "capa_timeout",
+         .fops =       &mdt_capa_timeout_fops                  },
+       { .name =       "capa_key_timeout",
+         .fops =       &mdt_ck_timeout_fops                    },
+       { .name =       "capa_count",
+         .fops =       &mdt_capa_count_fops                    },
+       { .name =       "site_stats",
+         .fops =       &mdt_site_stats_fops                    },
+       { .name =       "evict_client",
+         .fops =       &mdt_mds_evict_client_fops              },
+       { .name =       "hash_stats",
+         .fops =       &mdt_hash_fops                          },
+       { .name =       "sec_level",
+         .fops =       &mdt_sec_level_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 =       "som",
+         .fops =       &mdt_som_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 =       "hsm_control",
+         .fops =       &mdt_hsm_cdt_control_fops               },
+       { 0 }
 };
 
-void lprocfs_mdt_init_vars(struct lprocfs_static_vars *lvars)
+static int lprocfs_mdt_print_open_files(cfs_hash_t *hs, cfs_hash_bd_t *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;
+
+       cfs_hash_for_each_key(obd->obd_nid_hash, &stats->nid,
+                             lprocfs_mdt_print_open_files, seq);
+
+       return 0;
+}
+
+int lprocfs_mdt_open_files_seq_open(struct inode *inode, struct file *file)
+{
+       struct seq_file         *seq;
+       int                     rc;
+
+       rc = single_open(file, &lprocfs_mdt_open_files_seq_show, NULL);
+       if (rc != 0)
+               return rc;
+
+       seq = file->private_data;
+       seq->private = PDE_DATA(inode);
+
+       return 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);
+       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);
+}
+
+void mdt_stats_counter_init(struct lprocfs_stats *stats)
+{
+        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");
+}
+
+int mdt_procfs_init(struct mdt_device *mdt, const char *name)
+{
+       struct obd_device               *obd = mdt2obd_dev(mdt);
+       int                              rc;
+       ENTRY;
+
+       LASSERT(name != NULL);
+
+       obd->obd_vars = lprocfs_mdt_obd_vars;
+       rc = lprocfs_obd_setup(obd);
+       if (rc) {
+               CERROR("%s: cannot create proc entries: 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, LPROC_MDT_LAST);
+       if (rc)
+               return rc;
+       mdt_stats_counter_init(obd->obd_md_stats);
+
+       rc = lprocfs_job_stats_init(obd, LPROC_MDT_LAST,
+                                   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_procfs_fini(struct mdt_device *mdt)
 {
-    lvars->module_vars  = lprocfs_mdt_module_vars;
-    lvars->obd_vars     = lprocfs_mdt_obd_vars;
+       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);
+       lprocfs_obd_cleanup(obd);
+       lprocfs_free_md_stats(obd);
+       lprocfs_free_obd_stats(obd);
+       lprocfs_job_stats_fini(obd);
 }