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LU-12616 obclass: fix MDS start/stop race
[fs/lustre-release.git] / lustre / mdc / lproc_mdc.c
index c5cefe4..0c2e79a 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.
  *
  * 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
  */
 /*
- * Copyright  2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2017, Intel Corporation.
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
  */
 #define DEBUG_SUBSYSTEM S_CLASS
 
-#include <linux/version.h>
 #include <linux/vfs.h>
 #include <obd_class.h>
 #include <lprocfs_status.h>
-#include <lustre_log.h>
+#include <lustre_osc.h>
+#include <cl_object.h>
+#include "mdc_internal.h"
 
-#ifdef LPROCFS
+static ssize_t active_show(struct kobject *kobj, struct attribute *attr,
+                          char *buf)
+{
+       struct obd_device *dev = container_of(kobj, struct obd_device,
+                                             obd_kset.kobj);
+       ssize_t len;
+
+       LPROCFS_CLIMP_CHECK(dev);
+       len = sprintf(buf, "%d\n", !dev->u.cli.cl_import->imp_deactive);
+       LPROCFS_CLIMP_EXIT(dev);
+       return len;
+}
 
-static int mdc_rd_max_rpcs_in_flight(char *page, char **start, off_t off,
-                                     int count, int *eof, void *data)
+static ssize_t active_store(struct kobject *kobj, struct attribute *attr,
+                           const char *buffer, size_t count)
 {
-        struct obd_device *dev = data;
-        struct client_obd *cli = &dev->u.cli;
-        int rc;
+       struct obd_device *dev = container_of(kobj, struct obd_device,
+                                             obd_kset.kobj);
+       bool val;
+       int rc;
 
-        client_obd_list_lock(&cli->cl_loi_list_lock);
-        rc = snprintf(page, count, "%u\n", cli->cl_max_rpcs_in_flight);
-        client_obd_list_unlock(&cli->cl_loi_list_lock);
-        return rc;
+       rc = kstrtobool(buffer, &val);
+       if (rc)
+               return rc;
+
+       /* opposite senses */
+       if (dev->u.cli.cl_import->imp_deactive == val)
+               rc = ptlrpc_set_import_active(dev->u.cli.cl_import, val);
+       else
+               CDEBUG(D_CONFIG, "activate %u: ignoring repeat request\n",
+                      val);
+
+       return count;
 }
+LUSTRE_RW_ATTR(active);
 
-static int mdc_wr_max_rpcs_in_flight(struct file *file, const char *buffer,
-                                     unsigned long count, void *data)
+static ssize_t max_rpcs_in_flight_show(struct kobject *kobj,
+                                      struct attribute *attr,
+                                      char *buf)
 {
-        struct obd_device *dev = data;
-        struct client_obd *cli = &dev->u.cli;
-        int val, rc;
+       struct obd_device *dev = container_of(kobj, struct obd_device,
+                                             obd_kset.kobj);
+       ssize_t len;
+       u32 max;
 
-        rc = lprocfs_write_helper(buffer, count, &val);
-        if (rc)
-                return rc;
+       max = obd_get_max_rpcs_in_flight(&dev->u.cli);
+       len = sprintf(buf, "%u\n", max);
 
-        if (val < 1 || val > MDC_MAX_RIF_MAX)
-                return -ERANGE;
+       return len;
+}
 
-        client_obd_list_lock(&cli->cl_loi_list_lock);
-        cli->cl_max_rpcs_in_flight = val;
-        client_obd_list_unlock(&cli->cl_loi_list_lock);
+static ssize_t max_rpcs_in_flight_store(struct kobject *kobj,
+                                       struct attribute *attr,
+                                       const char *buffer,
+                                       size_t count)
+{
+       struct obd_device *dev = container_of(kobj, struct obd_device,
+                                             obd_kset.kobj);
+       unsigned int val;
+       int rc;
 
-        return count;
+       rc = kstrtouint(buffer, 10, &val);
+       if (rc)
+               return rc;
+
+       rc = obd_set_max_rpcs_in_flight(&dev->u.cli, val);
+       if (rc)
+               count = rc;
+
+       return count;
 }
+LUSTRE_RW_ATTR(max_rpcs_in_flight);
 
-static int mdc_changelog_seq_release(struct inode *inode, struct file *file)
+static ssize_t max_mod_rpcs_in_flight_show(struct kobject *kobj,
+                                          struct attribute *attr,
+                                          char *buf)
 {
-        struct seq_file *seq = file->private_data;
-        struct changelog_seq_iter *csi = seq->private;
+       struct obd_device *dev = container_of(kobj, struct obd_device,
+                                             obd_kset.kobj);
+       u16 max;
 
-        if (csi && csi->csi_llh)
-                llog_cat_put(csi->csi_llh);
-        if (csi && csi->csi_ctxt)
-                llog_ctxt_put(csi->csi_ctxt);
+       max = obd_get_max_mod_rpcs_in_flight(&dev->u.cli);
+       return sprintf(buf, "%hu\n", max);
+}
 
-        return (changelog_seq_release(inode, file));
+static ssize_t max_mod_rpcs_in_flight_store(struct kobject *kobj,
+                                           struct attribute *attr,
+                                           const char *buffer,
+                                           size_t count)
+{
+       struct obd_device *dev = container_of(kobj, struct obd_device,
+                                             obd_kset.kobj);
+       u16 val;
+       int rc;
+
+       rc = kstrtou16(buffer, 10, &val);
+       if (rc)
+               return rc;
+
+       rc = obd_set_max_mod_rpcs_in_flight(&dev->u.cli, val);
+       if (rc)
+               count = rc;
+
+       return count;
 }
+LUSTRE_RW_ATTR(max_mod_rpcs_in_flight);
 
-static int mdc_changelog_seq_open(struct inode *inode, struct file *file)
+static int mdc_max_dirty_mb_seq_show(struct seq_file *m, void *v)
 {
-        struct changelog_seq_iter *csi;
-        int rc;
-        ENTRY;
+       struct obd_device *dev = m->private;
+       struct client_obd *cli = &dev->u.cli;
+       unsigned long val;
 
-        rc = changelog_seq_open(inode, file, &csi);
-        if (rc)
-                RETURN(rc);
+       spin_lock(&cli->cl_loi_list_lock);
+       val = PAGES_TO_MiB(cli->cl_dirty_max_pages);
+       spin_unlock(&cli->cl_loi_list_lock);
 
-        /* Set up the remote catalog handle */
-        /* Note the proc file is set up with obd in data, not mdc_device */
-        csi->csi_ctxt = llog_get_context((struct obd_device *)csi->csi_dev,
-                                         LLOG_CHANGELOG_REPL_CTXT);
-        if (csi->csi_ctxt == NULL)
-                GOTO(out, rc = -ENOENT);
-        rc = llog_create(csi->csi_ctxt, &csi->csi_llh, NULL, CHANGELOG_CATALOG);
-        if (rc) {
-                CERROR("llog_create() failed %d\n", rc);
-                GOTO(out, rc);
-        }
-        rc = llog_init_handle(csi->csi_llh, LLOG_F_IS_CAT, NULL);
-        if (rc) {
-                CERROR("llog_init_handle failed %d\n", rc);
-                GOTO(out, rc);
-        }
+       seq_printf(m, "%lu\n", val);
+       return 0;
+}
+
+static ssize_t mdc_max_dirty_mb_seq_write(struct file *file,
+                                         const char __user *buffer,
+                                         size_t count, loff_t *off)
+{
+       struct seq_file *sfl = file->private_data;
+       struct obd_device *dev = sfl->private;
+       struct client_obd *cli = &dev->u.cli;
+       s64 pages_number;
+       int rc;
 
-out:
-        if (rc)
-                mdc_changelog_seq_release(inode, file);
-        RETURN(rc);
+       rc = lprocfs_str_with_units_to_s64(buffer, count, &pages_number, 'M');
+       if (rc)
+               return rc;
+
+       /* MB -> pages */
+       pages_number = round_up(pages_number, 1024 * 1024) >> PAGE_SHIFT;
+       if (pages_number <= 0 ||
+           pages_number >= MiB_TO_PAGES(OSC_MAX_DIRTY_MB_MAX) ||
+           pages_number > cfs_totalram_pages() / 4) /* 1/4 of RAM */
+               return -ERANGE;
+
+       spin_lock(&cli->cl_loi_list_lock);
+       cli->cl_dirty_max_pages = pages_number;
+       osc_wake_cache_waiters(cli);
+       spin_unlock(&cli->cl_loi_list_lock);
+
+       return count;
 }
+LPROC_SEQ_FOPS(mdc_max_dirty_mb);
 
-static struct file_operations mdc_changelog_fops = {
-        .owner   = THIS_MODULE,
-        .open    = mdc_changelog_seq_open,
-        .read    = seq_read,
-        .llseek  = changelog_seq_lseek,
-        .release = mdc_changelog_seq_release,
-};
+static ssize_t contention_seconds_show(struct kobject *kobj,
+                                      struct attribute *attr,
+                                      char *buf)
+{
+       struct obd_device *obd = container_of(kobj, struct obd_device,
+                                             obd_kset.kobj);
+       struct osc_device *od = obd2osc_dev(obd);
 
+       return sprintf(buf, "%lld\n", od->od_contention_time);
+}
+
+static ssize_t contention_seconds_store(struct kobject *kobj,
+                                       struct attribute *attr,
+                                       const char *buffer,
+                                       size_t count)
+{
+       struct obd_device *obd = container_of(kobj, struct obd_device,
+                                             obd_kset.kobj);
+       struct osc_device *od = obd2osc_dev(obd);
+       time64_t val;
+       int rc;
+
+       rc = kstrtoll(buffer, 0, &val);
+       if (rc)
+               return rc;
+
+       od->od_contention_time = val;
+
+       return count;
+}
+LUSTRE_RW_ATTR(contention_seconds);
+
+LUSTRE_ATTR(mds_conn_uuid, 0444, conn_uuid_show, NULL);
+LUSTRE_RO_ATTR(conn_uuid);
+
+LUSTRE_RW_ATTR(ping);
+
+static int mdc_cached_mb_seq_show(struct seq_file *m, void *v)
+{
+       struct obd_device *dev = m->private;
+       struct client_obd *cli = &dev->u.cli;
+       int shift = 20 - PAGE_SHIFT;
+
+       seq_printf(m, "used_mb: %ld\n"
+                  "busy_cnt: %ld\n"
+                  "reclaim: %llu\n",
+                  (atomic_long_read(&cli->cl_lru_in_list) +
+                   atomic_long_read(&cli->cl_lru_busy)) >> shift,
+                   atomic_long_read(&cli->cl_lru_busy),
+                  cli->cl_lru_reclaim);
+
+       return 0;
+}
+
+/* shrink the number of caching pages to a specific number */
+static ssize_t
+mdc_cached_mb_seq_write(struct file *file, const char __user *buffer,
+                       size_t count, loff_t *off)
+{
+       struct seq_file *sfl = file->private_data;
+       struct obd_device *dev = sfl->private;
+       struct client_obd *cli = &dev->u.cli;
+       __s64 pages_number;
+       long rc;
+       char kernbuf[128];
+
+       if (count >= sizeof(kernbuf))
+               return -EINVAL;
+
+       if (copy_from_user(kernbuf, buffer, count))
+               return -EFAULT;
+       kernbuf[count] = 0;
+
+       buffer += lprocfs_find_named_value(kernbuf, "used_mb:", &count) -
+                 kernbuf;
+       rc = lprocfs_str_with_units_to_s64(buffer, count, &pages_number, 'M');
+       if (rc)
+               return rc;
+
+       pages_number >>= PAGE_SHIFT;
+
+       if (pages_number < 0)
+               return -ERANGE;
+
+       rc = atomic_long_read(&cli->cl_lru_in_list) - pages_number;
+       if (rc > 0) {
+               struct lu_env *env;
+               __u16 refcheck;
+
+               env = cl_env_get(&refcheck);
+               if (!IS_ERR(env)) {
+                       (void)osc_lru_shrink(env, cli, rc, true);
+                       cl_env_put(env, &refcheck);
+               }
+       }
+
+       return count;
+}
+LPROC_SEQ_FOPS(mdc_cached_mb);
+
+static int mdc_unstable_stats_seq_show(struct seq_file *m, void *v)
+{
+       struct obd_device *dev = m->private;
+       struct client_obd *cli = &dev->u.cli;
+       long pages;
+       int mb;
 
-static struct lprocfs_vars lprocfs_mdc_obd_vars[] = {
-        { "uuid",            lprocfs_rd_uuid,        0, 0 },
-        { "ping",            0, lprocfs_wr_ping,     0, 0, 0222 },
-        { "connect_flags",   lprocfs_rd_connect_flags, 0, 0 },
-        { "blocksize",       lprocfs_rd_blksize,     0, 0 },
-        { "kbytestotal",     lprocfs_rd_kbytestotal, 0, 0 },
-        { "kbytesfree",      lprocfs_rd_kbytesfree,  0, 0 },
-        { "kbytesavail",     lprocfs_rd_kbytesavail, 0, 0 },
-        { "filestotal",      lprocfs_rd_filestotal,  0, 0 },
-        { "filesfree",       lprocfs_rd_filesfree,   0, 0 },
-        /*{ "filegroups",      lprocfs_rd_filegroups,  0, 0 },*/
-        { "mds_server_uuid", lprocfs_rd_server_uuid, 0, 0 },
-        { "mds_conn_uuid",   lprocfs_rd_conn_uuid,   0, 0 },
-        { "max_rpcs_in_flight", mdc_rd_max_rpcs_in_flight,
-                                mdc_wr_max_rpcs_in_flight, 0 },
-        { "quota_resend_count",  lprocfs_rd_quota_resend_count,
-                                 lprocfs_wr_quota_resend_count, 0},
-        { "timeouts",        lprocfs_rd_timeouts,    0, 0 },
-        { "import",          lprocfs_rd_import,      0, 0 },
-        { "state",           lprocfs_rd_state,       0, 0 },
-        { "changelog",       0, 0, 0, &mdc_changelog_fops, 0400 },
-        { 0 }
+       pages = atomic_long_read(&cli->cl_unstable_count);
+       mb    = (pages * PAGE_SIZE) >> 20;
+
+       seq_printf(m, "unstable_pages: %20ld\n"
+                  "unstable_mb:              %10d\n", pages, mb);
+       return 0;
+}
+LPROC_SEQ_FOPS_RO(mdc_unstable_stats);
+
+static ssize_t mdc_rpc_stats_seq_write(struct file *file,
+                                      const char __user *buf,
+                                      size_t len, loff_t *off)
+{
+       struct seq_file *seq = file->private_data;
+       struct obd_device *dev = seq->private;
+       struct client_obd *cli = &dev->u.cli;
+
+       lprocfs_oh_clear(&cli->cl_mod_rpcs_hist);
+
+       lprocfs_oh_clear(&cli->cl_read_rpc_hist);
+       lprocfs_oh_clear(&cli->cl_write_rpc_hist);
+       lprocfs_oh_clear(&cli->cl_read_page_hist);
+       lprocfs_oh_clear(&cli->cl_write_page_hist);
+       lprocfs_oh_clear(&cli->cl_read_offset_hist);
+       lprocfs_oh_clear(&cli->cl_write_offset_hist);
+
+       return len;
+}
+
+static int mdc_rpc_stats_seq_show(struct seq_file *seq, void *v)
+{
+       struct obd_device *dev = seq->private;
+       struct client_obd *cli = &dev->u.cli;
+       unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
+       int i;
+
+       obd_mod_rpc_stats_seq_show(&dev->u.cli, seq);
+
+       spin_lock(&cli->cl_loi_list_lock);
+
+       seq_printf(seq, "\nread RPCs in flight:  %d\n",
+                  cli->cl_r_in_flight);
+       seq_printf(seq, "write RPCs in flight: %d\n",
+                  cli->cl_w_in_flight);
+       seq_printf(seq, "pending write pages:  %d\n",
+                  atomic_read(&cli->cl_pending_w_pages));
+       seq_printf(seq, "pending read pages:   %d\n",
+                  atomic_read(&cli->cl_pending_r_pages));
+
+       seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
+       seq_printf(seq, "pages per rpc         rpcs   %% cum %% |");
+       seq_printf(seq, "       rpcs   %% cum %%\n");
+
+       read_tot = lprocfs_oh_sum(&cli->cl_read_page_hist);
+       write_tot = lprocfs_oh_sum(&cli->cl_write_page_hist);
+
+       read_cum = 0;
+       write_cum = 0;
+       for (i = 0; i < OBD_HIST_MAX; i++) {
+               unsigned long r = cli->cl_read_page_hist.oh_buckets[i];
+               unsigned long w = cli->cl_write_page_hist.oh_buckets[i];
+
+               read_cum += r;
+               write_cum += w;
+               seq_printf(seq, "%d:\t\t%10lu %3u %3u   | %10lu %3u %3u\n",
+                          1 << i, r, pct(r, read_tot),
+                          pct(read_cum, read_tot), w,
+                          pct(w, write_tot),
+                          pct(write_cum, write_tot));
+               if (read_cum == read_tot && write_cum == write_tot)
+                       break;
+       }
+
+       seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
+       seq_printf(seq, "rpcs in flight        rpcs   %% cum %% |");
+       seq_printf(seq, "       rpcs   %% cum %%\n");
+
+       read_tot = lprocfs_oh_sum(&cli->cl_read_rpc_hist);
+       write_tot = lprocfs_oh_sum(&cli->cl_write_rpc_hist);
+
+       read_cum = 0;
+       write_cum = 0;
+       for (i = 0; i < OBD_HIST_MAX; i++) {
+               unsigned long r = cli->cl_read_rpc_hist.oh_buckets[i];
+               unsigned long w = cli->cl_write_rpc_hist.oh_buckets[i];
+
+               read_cum += r;
+               write_cum += w;
+               seq_printf(seq, "%d:\t\t%10lu %3u %3u   | %10lu %3u %3u\n",
+                          i, r, pct(r, read_tot), pct(read_cum, read_tot), w,
+                          pct(w, write_tot), pct(write_cum, write_tot));
+               if (read_cum == read_tot && write_cum == write_tot)
+                       break;
+       }
+
+       seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
+       seq_printf(seq, "offset                rpcs   %% cum %% |");
+       seq_printf(seq, "       rpcs   %% cum %%\n");
+
+       read_tot = lprocfs_oh_sum(&cli->cl_read_offset_hist);
+       write_tot = lprocfs_oh_sum(&cli->cl_write_offset_hist);
+
+       read_cum = 0;
+       write_cum = 0;
+       for (i = 0; i < OBD_HIST_MAX; i++) {
+               unsigned long r = cli->cl_read_offset_hist.oh_buckets[i];
+               unsigned long w = cli->cl_write_offset_hist.oh_buckets[i];
+
+               read_cum += r;
+               write_cum += w;
+               seq_printf(seq, "%d:\t\t%10lu %3u %3u   | %10lu %3u %3u\n",
+                          (i == 0) ? 0 : 1 << (i - 1),
+                          r, pct(r, read_tot), pct(read_cum, read_tot),
+                          w, pct(w, write_tot), pct(write_cum, write_tot));
+               if (read_cum == read_tot && write_cum == write_tot)
+                       break;
+       }
+       spin_unlock(&cli->cl_loi_list_lock);
+
+       return 0;
+}
+LPROC_SEQ_FOPS(mdc_rpc_stats);
+
+static int mdc_stats_seq_show(struct seq_file *seq, void *v)
+{
+       struct timespec64 now;
+       struct obd_device *dev = seq->private;
+       struct osc_stats *stats = &obd2osc_dev(dev)->od_stats;
+
+       ktime_get_real_ts64(&now);
+
+       seq_printf(seq, "snapshot_time:         %lld.%09lu (secs.nsecs)\n",
+                  (s64)now.tv_sec, now.tv_nsec);
+       seq_printf(seq, "lockless_write_bytes\t\t%llu\n",
+                  stats->os_lockless_writes);
+       seq_printf(seq, "lockless_read_bytes\t\t%llu\n",
+                  stats->os_lockless_reads);
+       seq_printf(seq, "lockless_truncate\t\t%llu\n",
+                  stats->os_lockless_truncates);
+       return 0;
+}
+
+static ssize_t mdc_stats_seq_write(struct file *file,
+                                  const char __user *buf,
+                                  size_t len, loff_t *off)
+{
+       struct seq_file *seq = file->private_data;
+       struct obd_device *dev = seq->private;
+       struct osc_stats *stats = &obd2osc_dev(dev)->od_stats;
+
+       memset(stats, 0, sizeof(*stats));
+       return len;
+}
+LPROC_SEQ_FOPS(mdc_stats);
+
+static int mdc_dom_min_repsize_seq_show(struct seq_file *m, void *v)
+{
+       struct obd_device *dev = m->private;
+
+       seq_printf(m, "%u\n", dev->u.cli.cl_dom_min_inline_repsize);
+
+       return 0;
+}
+
+static ssize_t mdc_dom_min_repsize_seq_write(struct file *file,
+                                            const char __user *buffer,
+                                            size_t count, loff_t *off)
+{
+       struct obd_device *dev;
+       unsigned int val;
+       int rc;
+
+       dev =  ((struct seq_file *)file->private_data)->private;
+       rc = kstrtouint_from_user(buffer, count, 0, &val);
+       if (rc)
+               return rc;
+
+       if (val > MDC_DOM_MAX_INLINE_REPSIZE)
+               return -ERANGE;
+
+       dev->u.cli.cl_dom_min_inline_repsize = val;
+       return count;
+}
+LPROC_SEQ_FOPS(mdc_dom_min_repsize);
+
+LPROC_SEQ_FOPS_RO_TYPE(mdc, connect_flags);
+LPROC_SEQ_FOPS_RO_TYPE(mdc, server_uuid);
+LPROC_SEQ_FOPS_RO_TYPE(mdc, timeouts);
+LPROC_SEQ_FOPS_RO_TYPE(mdc, state);
+LPROC_SEQ_FOPS_RW_TYPE(mdc, obd_max_pages_per_rpc);
+LPROC_SEQ_FOPS_RW_TYPE(mdc, import);
+LPROC_SEQ_FOPS_RW_TYPE(mdc, pinger_recov);
+
+struct lprocfs_vars lprocfs_mdc_obd_vars[] = {
+       { .name =       "connect_flags",
+         .fops =       &mdc_connect_flags_fops },
+       { .name =       "mds_server_uuid",
+         .fops =       &mdc_server_uuid_fops   },
+       { .name =       "max_pages_per_rpc",
+         .fops =       &mdc_obd_max_pages_per_rpc_fops },
+       { .name =       "max_dirty_mb",
+         .fops =       &mdc_max_dirty_mb_fops          },
+       { .name =       "mdc_cached_mb",
+         .fops =       &mdc_cached_mb_fops             },
+       { .name =       "timeouts",
+         .fops =       &mdc_timeouts_fops              },
+       { .name =       "import",
+         .fops =       &mdc_import_fops                },
+       { .name =       "state",
+         .fops =       &mdc_state_fops                 },
+       { .name =       "pinger_recov",
+         .fops =       &mdc_pinger_recov_fops          },
+       { .name =       "rpc_stats",
+         .fops =       &mdc_rpc_stats_fops             },
+       { .name =       "unstable_stats",
+         .fops =       &mdc_unstable_stats_fops        },
+       { .name =       "mdc_stats",
+         .fops =       &mdc_stats_fops                 },
+       { .name =       "mdc_dom_min_repsize",
+         .fops =       &mdc_dom_min_repsize_fops       },
+       { NULL }
 };
 
-static struct lprocfs_vars lprocfs_mdc_module_vars[] = {
-        { "num_refs",        lprocfs_rd_numrefs,     0, 0 },
-        { 0 }
+static struct attribute *mdc_attrs[] = {
+       &lustre_attr_active.attr,
+       &lustre_attr_max_rpcs_in_flight.attr,
+       &lustre_attr_max_mod_rpcs_in_flight.attr,
+       &lustre_attr_contention_seconds.attr,
+       &lustre_attr_mds_conn_uuid.attr,
+       &lustre_attr_conn_uuid.attr,
+       &lustre_attr_ping.attr,
+       NULL,
 };
 
-void lprocfs_mdc_init_vars(struct lprocfs_static_vars *lvars)
+int mdc_tunables_init(struct obd_device *obd)
 {
-    lvars->module_vars  = lprocfs_mdc_module_vars;
-    lvars->obd_vars     = lprocfs_mdc_obd_vars;
+       int rc;
+
+       obd->obd_ktype.default_attrs = mdc_attrs;
+       obd->obd_vars = lprocfs_mdc_obd_vars;
+
+       rc = lprocfs_obd_setup(obd, false);
+       if (rc)
+               goto out_failed;
+#ifdef CONFIG_PROC_FS
+       rc = lprocfs_alloc_md_stats(obd, 0);
+       if (rc) {
+               lprocfs_obd_cleanup(obd);
+               goto out_failed;
+       }
+#endif
+       rc = sptlrpc_lprocfs_cliobd_attach(obd);
+       if (rc) {
+#ifdef CONFIG_PROC_FS
+               lprocfs_free_md_stats(obd);
+#endif
+               lprocfs_obd_cleanup(obd);
+               goto out_failed;
+       }
+       ptlrpc_lprocfs_register_obd(obd);
+
+out_failed:
+       return rc;
 }
-#endif /* LPROCFS */