staging: lustre: delete the filesystem from the tree.

The Lustre filesystem has been in the kernel tree for over 5 years now.
While it has been an endless source of enjoyment for new kernel
developers learning how to do basic codingstyle cleanups, as well as an
semi-entertaining source of bewilderment from the vfs developers any
time they have looked into the codebase to try to figure out how to port
their latest api changes to this filesystem, it has not really moved
forward into the "this is in shape to get out of staging" despite many
half-completed attempts.

And getting code out of staging is the main goal of that portion of the
kernel tree.  Code should not stagnate and it feels like having this
code in staging is only causing the development cycle of the filesystem
to take longer than it should.  There is a whole separate out-of-tree
copy of this codebase where the developers work on it, and then random
changes are thrown over the wall at staging at some later point in time.
This dual-tree development model has never worked, and the state of this
codebase is proof of that.

So, let's just delete the whole mess.  Now the lustre developers can go
off and work in their out-of-tree codebase and not have to worry about
providing valid changelog entries and breaking their patches up into
logical pieces.  They can take the time they have spend doing those
types of housekeeping chores and get the codebase into a much better
shape, and it can be submitted for inclusion into the real part of the
kernel tree when ready.

Cc: Oleg Drokin <oleg.drokin@intel.com>
Cc: Andreas Dilger <andreas.dilger@intel.com>
Cc: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 0 insertions, 838 deletions

diff --git a/drivers/staging/lustre/lustre/osc/lproc_osc.c b/drivers/staging/lustre/lustre/osc/lproc_osc.c
deleted file mode 100644
index 6a705bc5420c..000000000000
--- a/drivers/staging/lustre/lustre/osc/lproc_osc.c
+++ /dev/null
@@ -1,838 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * GPL HEADER START
- *
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 only,
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License version 2 for more details (a copy is included
- * in the LICENSE file that accompanied this code).
- *
- * You should have received a copy of the GNU General Public License
- * version 2 along with this program; If not, see
- * http://www.gnu.org/licenses/gpl-2.0.html
- *
- * GPL HEADER END
- */
-/*
- * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
- * Use is subject to license terms.
- *
- * Copyright (c) 2011, 2015, Intel Corporation.
- */
-/*
- * This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
- */
-#define DEBUG_SUBSYSTEM S_CLASS
-
-#include <linux/statfs.h>
-#include <obd_cksum.h>
-#include <obd_class.h>
-#include <lprocfs_status.h>
-#include <linux/seq_file.h>
-#include "osc_internal.h"
-
-static ssize_t active_show(struct kobject *kobj, struct attribute *attr,
-			   char *buf)
-{
-	struct obd_device *dev = container_of(kobj, struct obd_device,
-					      obd_kobj);
-
-	return sprintf(buf, "%d\n", !dev->u.cli.cl_import->imp_deactive);
-}
-
-static ssize_t active_store(struct kobject *kobj, struct attribute *attr,
-			    const char *buffer,
-			    size_t count)
-{
-	struct obd_device *dev = container_of(kobj, struct obd_device,
-					      obd_kobj);
-	int rc;
-	unsigned long val;
-
-	rc = kstrtoul(buffer, 10, &val);
-	if (rc)
-		return rc;
-	if (val > 1)
-		return -ERANGE;
-
-	/* 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 %ld: ignoring repeat request\n",
-		       val);
-
-	return count;
-}
-LUSTRE_RW_ATTR(active);
-
-static ssize_t max_rpcs_in_flight_show(struct kobject *kobj,
-				       struct attribute *attr,
-				       char *buf)
-{
-	struct obd_device *dev = container_of(kobj, struct obd_device,
-					      obd_kobj);
-	struct client_obd *cli = &dev->u.cli;
-
-	return sprintf(buf, "%u\n", cli->cl_max_rpcs_in_flight);
-}
-
-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_kobj);
-	struct client_obd *cli = &dev->u.cli;
-	int rc;
-	unsigned long val;
-	int adding, added, req_count;
-
-	rc = kstrtoul(buffer, 10, &val);
-	if (rc)
-		return rc;
-
-	if (val < 1 || val > OSC_MAX_RIF_MAX)
-		return -ERANGE;
-
-	adding = val - cli->cl_max_rpcs_in_flight;
-	req_count = atomic_read(&osc_pool_req_count);
-	if (adding > 0 && req_count < osc_reqpool_maxreqcount) {
-		/*
-		 * There might be some race which will cause over-limit
-		 * allocation, but it is fine.
-		 */
-		if (req_count + adding > osc_reqpool_maxreqcount)
-			adding = osc_reqpool_maxreqcount - req_count;
-
-		added = osc_rq_pool->prp_populate(osc_rq_pool, adding);
-		atomic_add(added, &osc_pool_req_count);
-	}
-
-	spin_lock(&cli->cl_loi_list_lock);
-	cli->cl_max_rpcs_in_flight = val;
-	client_adjust_max_dirty(cli);
-	spin_unlock(&cli->cl_loi_list_lock);
-
-	return count;
-}
-LUSTRE_RW_ATTR(max_rpcs_in_flight);
-
-static ssize_t max_dirty_mb_show(struct kobject *kobj,
-				 struct attribute *attr,
-				 char *buf)
-{
-	struct obd_device *dev = container_of(kobj, struct obd_device,
-					      obd_kobj);
-	struct client_obd *cli = &dev->u.cli;
-	long val;
-	int mult;
-
-	spin_lock(&cli->cl_loi_list_lock);
-	val = cli->cl_dirty_max_pages;
-	spin_unlock(&cli->cl_loi_list_lock);
-
-	mult = 1 << (20 - PAGE_SHIFT);
-	return lprocfs_read_frac_helper(buf, PAGE_SIZE, val, mult);
-}
-
-static ssize_t max_dirty_mb_store(struct kobject *kobj,
-				  struct attribute *attr,
-				  const char *buffer,
-				  size_t count)
-{
-	struct obd_device *dev = container_of(kobj, struct obd_device,
-					      obd_kobj);
-	struct client_obd *cli = &dev->u.cli;
-	int rc;
-	unsigned long pages_number;
-
-	rc = kstrtoul(buffer, 10, &pages_number);
-	if (rc)
-		return rc;
-
-	pages_number *= 1 << (20 - PAGE_SHIFT); /* MB -> pages */
-
-	if (pages_number <= 0 ||
-	    pages_number >= OSC_MAX_DIRTY_MB_MAX << (20 - PAGE_SHIFT) ||
-	    pages_number > 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;
-}
-LUSTRE_RW_ATTR(max_dirty_mb);
-
-static int osc_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 osc_cached_mb_seq_write(struct file *file,
-				       const char __user *buffer,
-				       size_t count, loff_t *off)
-{
-	struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
-	struct client_obd *cli = &dev->u.cli;
-	long pages_number, rc;
-	char kernbuf[128];
-	int mult;
-	u64 val;
-
-	if (count >= sizeof(kernbuf))
-		return -EINVAL;
-
-	if (copy_from_user(kernbuf, buffer, count))
-		return -EFAULT;
-	kernbuf[count] = 0;
-
-	mult = 1 << (20 - PAGE_SHIFT);
-	buffer += lprocfs_find_named_value(kernbuf, "used_mb:", &count) -
-		  kernbuf;
-	rc = lprocfs_write_frac_u64_helper(buffer, count, &val, mult);
-	if (rc)
-		return rc;
-
-	if (val > LONG_MAX)
-		return -ERANGE;
-	pages_number = (long)val;
-
-	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(osc_cached_mb);
-
-static ssize_t cur_dirty_bytes_show(struct kobject *kobj,
-				    struct attribute *attr,
-				    char *buf)
-{
-	struct obd_device *dev = container_of(kobj, struct obd_device,
-					      obd_kobj);
-	struct client_obd *cli = &dev->u.cli;
-	int len;
-
-	spin_lock(&cli->cl_loi_list_lock);
-	len = sprintf(buf, "%lu\n", cli->cl_dirty_pages << PAGE_SHIFT);
-	spin_unlock(&cli->cl_loi_list_lock);
-
-	return len;
-}
-LUSTRE_RO_ATTR(cur_dirty_bytes);
-
-static ssize_t cur_grant_bytes_show(struct kobject *kobj,
-				    struct attribute *attr,
-				    char *buf)
-{
-	struct obd_device *dev = container_of(kobj, struct obd_device,
-					      obd_kobj);
-	struct client_obd *cli = &dev->u.cli;
-	int len;
-
-	spin_lock(&cli->cl_loi_list_lock);
-	len = sprintf(buf, "%lu\n", cli->cl_avail_grant);
-	spin_unlock(&cli->cl_loi_list_lock);
-
-	return len;
-}
-
-static ssize_t cur_grant_bytes_store(struct kobject *kobj,
-				     struct attribute *attr,
-				     const char *buffer,
-				     size_t count)
-{
-	struct obd_device *obd = container_of(kobj, struct obd_device,
-					      obd_kobj);
-	struct client_obd *cli = &obd->u.cli;
-	int rc;
-	unsigned long long val;
-
-	rc = kstrtoull(buffer, 10, &val);
-	if (rc)
-		return rc;
-
-	/* this is only for shrinking grant */
-	spin_lock(&cli->cl_loi_list_lock);
-	if (val >= cli->cl_avail_grant) {
-		spin_unlock(&cli->cl_loi_list_lock);
-		return -EINVAL;
-	}
-	spin_unlock(&cli->cl_loi_list_lock);
-
-	if (cli->cl_import->imp_state == LUSTRE_IMP_FULL)
-		rc = osc_shrink_grant_to_target(cli, val);
-	if (rc)
-		return rc;
-	return count;
-}
-LUSTRE_RW_ATTR(cur_grant_bytes);
-
-static ssize_t cur_lost_grant_bytes_show(struct kobject *kobj,
-					 struct attribute *attr,
-					 char *buf)
-{
-	struct obd_device *dev = container_of(kobj, struct obd_device,
-					      obd_kobj);
-	struct client_obd *cli = &dev->u.cli;
-	int len;
-
-	spin_lock(&cli->cl_loi_list_lock);
-	len = sprintf(buf, "%lu\n", cli->cl_lost_grant);
-	spin_unlock(&cli->cl_loi_list_lock);
-
-	return len;
-}
-LUSTRE_RO_ATTR(cur_lost_grant_bytes);
-
-static ssize_t grant_shrink_interval_show(struct kobject *kobj,
-					  struct attribute *attr,
-					  char *buf)
-{
-	struct obd_device *obd = container_of(kobj, struct obd_device,
-					      obd_kobj);
-
-	return sprintf(buf, "%d\n", obd->u.cli.cl_grant_shrink_interval);
-}
-
-static ssize_t grant_shrink_interval_store(struct kobject *kobj,
-					   struct attribute *attr,
-					   const char *buffer,
-					   size_t count)
-{
-	struct obd_device *obd = container_of(kobj, struct obd_device,
-					      obd_kobj);
-	int rc;
-	unsigned long val;
-
-	rc = kstrtoul(buffer, 10, &val);
-	if (rc)
-		return rc;
-
-	if (val <= 0)
-		return -ERANGE;
-
-	obd->u.cli.cl_grant_shrink_interval = val;
-
-	return count;
-}
-LUSTRE_RW_ATTR(grant_shrink_interval);
-
-static ssize_t checksums_show(struct kobject *kobj,
-			      struct attribute *attr,
-			      char *buf)
-{
-	struct obd_device *obd = container_of(kobj, struct obd_device,
-					      obd_kobj);
-
-	return sprintf(buf, "%d\n", obd->u.cli.cl_checksum ? 1 : 0);
-}
-
-static ssize_t checksums_store(struct kobject *kobj,
-			       struct attribute *attr,
-			       const char *buffer,
-			       size_t count)
-{
-	struct obd_device *obd = container_of(kobj, struct obd_device,
-					      obd_kobj);
-	int rc;
-	unsigned long val;
-
-	rc = kstrtoul(buffer, 10, &val);
-	if (rc)
-		return rc;
-
-	obd->u.cli.cl_checksum = (val ? 1 : 0);
-
-	return count;
-}
-LUSTRE_RW_ATTR(checksums);
-
-static int osc_checksum_type_seq_show(struct seq_file *m, void *v)
-{
-	struct obd_device *obd = m->private;
-	int i;
-
-	DECLARE_CKSUM_NAME;
-
-	if (!obd)
-		return 0;
-
-	for (i = 0; i < ARRAY_SIZE(cksum_name); i++) {
-		if (((1 << i) & obd->u.cli.cl_supp_cksum_types) == 0)
-			continue;
-		if (obd->u.cli.cl_cksum_type == (1 << i))
-			seq_printf(m, "[%s] ", cksum_name[i]);
-		else
-			seq_printf(m, "%s ", cksum_name[i]);
-	}
-	seq_putc(m, '\n');
-	return 0;
-}
-
-static ssize_t osc_checksum_type_seq_write(struct file *file,
-					   const char __user *buffer,
-					   size_t count, loff_t *off)
-{
-	struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
-	int i;
-
-	DECLARE_CKSUM_NAME;
-	char kernbuf[10];
-
-	if (!obd)
-		return 0;
-
-	if (count > sizeof(kernbuf) - 1)
-		return -EINVAL;
-	if (copy_from_user(kernbuf, buffer, count))
-		return -EFAULT;
-	if (count > 0 && kernbuf[count - 1] == '\n')
-		kernbuf[count - 1] = '\0';
-	else
-		kernbuf[count] = '\0';
-
-	for (i = 0; i < ARRAY_SIZE(cksum_name); i++) {
-		if (((1 << i) & obd->u.cli.cl_supp_cksum_types) == 0)
-			continue;
-		if (!strcmp(kernbuf, cksum_name[i])) {
-			obd->u.cli.cl_cksum_type = 1 << i;
-			return count;
-		}
-	}
-	return -EINVAL;
-}
-
-LPROC_SEQ_FOPS(osc_checksum_type);
-
-static ssize_t resend_count_show(struct kobject *kobj,
-				 struct attribute *attr,
-				 char *buf)
-{
-	struct obd_device *obd = container_of(kobj, struct obd_device,
-					      obd_kobj);
-
-	return sprintf(buf, "%u\n", atomic_read(&obd->u.cli.cl_resends));
-}
-
-static ssize_t resend_count_store(struct kobject *kobj,
-				  struct attribute *attr,
-				  const char *buffer,
-				  size_t count)
-{
-	struct obd_device *obd = container_of(kobj, struct obd_device,
-					      obd_kobj);
-	int rc;
-	unsigned long val;
-
-	rc = kstrtoul(buffer, 10, &val);
-	if (rc)
-		return rc;
-
-	atomic_set(&obd->u.cli.cl_resends, val);
-
-	return count;
-}
-LUSTRE_RW_ATTR(resend_count);
-
-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_kobj);
-	struct osc_device *od  = obd2osc_dev(obd);
-
-	return sprintf(buf, "%u\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_kobj);
-	struct osc_device *od  = obd2osc_dev(obd);
-	int rc;
-	int val;
-
-	rc = kstrtoint(buffer, 10, &val);
-	if (rc)
-		return rc;
-
-	if (val < 0)
-		return -EINVAL;
-
-	od->od_contention_time = val;
-
-	return count;
-}
-LUSTRE_RW_ATTR(contention_seconds);
-
-static ssize_t lockless_truncate_show(struct kobject *kobj,
-				      struct attribute *attr,
-				      char *buf)
-{
-	struct obd_device *obd = container_of(kobj, struct obd_device,
-					      obd_kobj);
-	struct osc_device *od  = obd2osc_dev(obd);
-
-	return sprintf(buf, "%u\n", od->od_lockless_truncate);
-}
-
-static ssize_t lockless_truncate_store(struct kobject *kobj,
-				       struct attribute *attr,
-				       const char *buffer,
-				       size_t count)
-{
-	struct obd_device *obd = container_of(kobj, struct obd_device,
-					      obd_kobj);
-	struct osc_device *od  = obd2osc_dev(obd);
-	int rc;
-	unsigned int val;
-
-	rc = kstrtouint(buffer, 10, &val);
-	if (rc)
-		return rc;
-
-	od->od_lockless_truncate = val;
-
-	return count;
-}
-LUSTRE_RW_ATTR(lockless_truncate);
-
-static ssize_t destroys_in_flight_show(struct kobject *kobj,
-				       struct attribute *attr,
-				       char *buf)
-{
-	struct obd_device *obd = container_of(kobj, struct obd_device,
-					      obd_kobj);
-
-	return sprintf(buf, "%u\n",
-		       atomic_read(&obd->u.cli.cl_destroy_in_flight));
-}
-LUSTRE_RO_ATTR(destroys_in_flight);
-
-static ssize_t max_pages_per_rpc_show(struct kobject *kobj,
-				      struct attribute *attr,
-				      char *buf)
-{
-	struct obd_device *dev = container_of(kobj, struct obd_device,
-					      obd_kobj);
-	struct client_obd *cli = &dev->u.cli;
-
-	return sprintf(buf, "%d\n", cli->cl_max_pages_per_rpc);
-}
-
-static ssize_t max_pages_per_rpc_store(struct kobject *kobj,
-				       struct attribute *attr,
-				       const char *buffer,
-				       size_t count)
-{
-	struct obd_device *dev = container_of(kobj, struct obd_device,
-					      obd_kobj);
-	struct client_obd *cli = &dev->u.cli;
-	struct obd_connect_data *ocd = &cli->cl_import->imp_connect_data;
-	int chunk_mask, rc;
-	unsigned long long val;
-
-	rc = kstrtoull(buffer, 10, &val);
-	if (rc)
-		return rc;
-
-	/* if the max_pages is specified in bytes, convert to pages */
-	if (val >= ONE_MB_BRW_SIZE)
-		val >>= PAGE_SHIFT;
-
-	chunk_mask = ~((1 << (cli->cl_chunkbits - PAGE_SHIFT)) - 1);
-	/* max_pages_per_rpc must be chunk aligned */
-	val = (val + ~chunk_mask) & chunk_mask;
-	if (!val || (ocd->ocd_brw_size &&
-		     val > ocd->ocd_brw_size >> PAGE_SHIFT)) {
-		return -ERANGE;
-	}
-	spin_lock(&cli->cl_loi_list_lock);
-	cli->cl_max_pages_per_rpc = val;
-	client_adjust_max_dirty(cli);
-	spin_unlock(&cli->cl_loi_list_lock);
-
-	return count;
-}
-LUSTRE_RW_ATTR(max_pages_per_rpc);
-
-static ssize_t unstable_stats_show(struct kobject *kobj,
-				   struct attribute *attr,
-				   char *buf)
-{
-	struct obd_device *dev = container_of(kobj, struct obd_device,
-					      obd_kobj);
-	struct client_obd *cli = &dev->u.cli;
-	long pages;
-	int mb;
-
-	pages = atomic_long_read(&cli->cl_unstable_count);
-	mb = (pages * PAGE_SIZE) >> 20;
-
-	return sprintf(buf, "unstable_pages: %20ld\n"
-		       "unstable_mb:              %10d\n", pages, mb);
-}
-LUSTRE_RO_ATTR(unstable_stats);
-
-LPROC_SEQ_FOPS_RO_TYPE(osc, connect_flags);
-LPROC_SEQ_FOPS_RO_TYPE(osc, server_uuid);
-LPROC_SEQ_FOPS_RO_TYPE(osc, conn_uuid);
-LPROC_SEQ_FOPS_RO_TYPE(osc, timeouts);
-LPROC_SEQ_FOPS_RO_TYPE(osc, state);
-
-LPROC_SEQ_FOPS_WR_ONLY(osc, ping);
-
-LPROC_SEQ_FOPS_RW_TYPE(osc, import);
-LPROC_SEQ_FOPS_RW_TYPE(osc, pinger_recov);
-
-static struct lprocfs_vars lprocfs_osc_obd_vars[] = {
-	{ "ping",	     &osc_ping_fops,    NULL, 0222 },
-	{ "connect_flags",   &osc_connect_flags_fops, NULL, 0 },
-	/*{ "filegroups",      lprocfs_rd_filegroups,  NULL, 0 },*/
-	{ "ost_server_uuid", &osc_server_uuid_fops, NULL, 0 },
-	{ "ost_conn_uuid",   &osc_conn_uuid_fops, NULL, 0 },
-	{ "osc_cached_mb",   &osc_cached_mb_fops, NULL },
-	{ "checksum_type",   &osc_checksum_type_fops, NULL },
-	{ "timeouts",	     &osc_timeouts_fops, NULL, 0 },
-	{ "import",		&osc_import_fops, NULL },
-	{ "state",		&osc_state_fops, NULL, 0 },
-	{ "pinger_recov",	&osc_pinger_recov_fops, NULL },
-	{ NULL }
-};
-
-#define pct(a, b) (b ? a * 100 / b : 0)
-
-static int osc_rpc_stats_seq_show(struct seq_file *seq, void *v)
-{
-	struct timespec64 now;
-	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;
-
-	ktime_get_real_ts64(&now);
-
-	spin_lock(&cli->cl_loi_list_lock);
-
-	seq_printf(seq, "snapshot_time:	 %llu.%9lu (secs.usecs)\n",
-		   (s64)now.tv_sec, (unsigned long)now.tv_nsec);
-	seq_printf(seq, "read 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_puts(seq, "\n\t\t\tread\t\t\twrite\n");
-	seq_puts(seq, "pages per rpc	 rpcs   % cum % |");
-	seq_puts(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 %3lu %3lu   | %10lu %3lu %3lu\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_puts(seq, "\n\t\t\tread\t\t\twrite\n");
-	seq_puts(seq, "rpcs in flight	rpcs   % cum % |");
-	seq_puts(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 %3lu %3lu   | %10lu %3lu %3lu\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_puts(seq, "\n\t\t\tread\t\t\twrite\n");
-	seq_puts(seq, "offset		rpcs   % cum % |");
-	seq_puts(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 %3lu %3lu   | %10lu %3lu %3lu\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;
-}
-
-#undef pct
-
-static ssize_t osc_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_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;
-}
-
-LPROC_SEQ_FOPS(osc_rpc_stats);
-
-static int osc_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:	 %llu.%9lu (secs.usecs)\n",
-		   (s64)now.tv_sec, (unsigned long)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 osc_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(osc_stats);
-
-void lproc_osc_attach_seqstat(struct obd_device *dev)
-{
-	debugfs_create_file("osc_stats", 0644, dev->obd_debugfs_entry, dev,
-			    &osc_stats_fops);
-	debugfs_create_file("rpc_stats", 0644, dev->obd_debugfs_entry, dev,
-			    &osc_rpc_stats_fops);
-}
-
-static struct attribute *osc_attrs[] = {
-	&lustre_attr_active.attr,
-	&lustre_attr_checksums.attr,
-	&lustre_attr_contention_seconds.attr,
-	&lustre_attr_cur_dirty_bytes.attr,
-	&lustre_attr_cur_grant_bytes.attr,
-	&lustre_attr_cur_lost_grant_bytes.attr,
-	&lustre_attr_destroys_in_flight.attr,
-	&lustre_attr_grant_shrink_interval.attr,
-	&lustre_attr_lockless_truncate.attr,
-	&lustre_attr_max_dirty_mb.attr,
-	&lustre_attr_max_pages_per_rpc.attr,
-	&lustre_attr_max_rpcs_in_flight.attr,
-	&lustre_attr_resend_count.attr,
-	&lustre_attr_unstable_stats.attr,
-	NULL,
-};
-
-static const struct attribute_group osc_attr_group = {
-	.attrs = osc_attrs,
-};
-
-void lprocfs_osc_init_vars(struct lprocfs_static_vars *lvars)
-{
-	lvars->sysfs_vars  = &osc_attr_group;
-	lvars->obd_vars    = lprocfs_osc_obd_vars;
-}