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/*
* 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.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.
*
* GPL HEADER END
*/
/*
* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2011, 2012, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Lustre is a trademark of Sun Microsystems, Inc.
*
* lustre/fid/lproc_fid.c
*
* Lustre Sequence Manager
*
* Author: Yury Umanets <umka@clusterfs.com>
*/
#define DEBUG_SUBSYSTEM S_FID
#include "../../include/linux/libcfs/libcfs.h"
#include <linux/module.h>
#include "../include/obd.h"
#include "../include/obd_class.h"
#include "../include/dt_object.h"
#include "../include/obd_support.h"
#include "../include/lustre_req_layout.h"
#include "../include/lustre_fid.h"
#include "fid_internal.h"
/* Format: [0x64BIT_INT - 0x64BIT_INT] + 32 bytes just in case */
#define MAX_FID_RANGE_STRLEN (32 + 2 * 2 * sizeof(__u64))
/*
* Note: this function is only used for testing, it is no safe for production
* use.
*/
static int lprocfs_fid_write_common(const char __user *buffer, size_t count,
struct lu_seq_range *range)
{
struct lu_seq_range tmp;
int rc;
char kernbuf[MAX_FID_RANGE_STRLEN];
LASSERT(range != NULL);
if (count >= sizeof(kernbuf))
return -EINVAL;
if (copy_from_user(kernbuf, buffer, count))
return -EFAULT;
kernbuf[count] = 0;
if (count == 5 && strcmp(kernbuf, "clear") == 0) {
memset(range, 0, sizeof(*range));
return count;
}
/* of the form "[0x0000000240000400 - 0x000000028000400]" */
rc = sscanf(kernbuf, "[%llx - %llx]\n",
(unsigned long long *)&tmp.lsr_start,
(unsigned long long *)&tmp.lsr_end);
if (!range_is_sane(&tmp) || range_is_zero(&tmp) ||
tmp.lsr_start < range->lsr_start || tmp.lsr_end > range->lsr_end)
return -EINVAL;
*range = tmp;
return count;
}
/* Client side procfs stuff */
static ssize_t lprocfs_fid_space_seq_write(struct file *file,
const char __user *buffer,
size_t count, loff_t *off)
{
struct lu_client_seq *seq;
int rc;
seq = ((struct seq_file *)file->private_data)->private;
LASSERT(seq != NULL);
mutex_lock(&seq->lcs_mutex);
rc = lprocfs_fid_write_common(buffer, count, &seq->lcs_space);
if (rc == 0) {
CDEBUG(D_INFO, "%s: Space: "DRANGE"\n",
seq->lcs_name, PRANGE(&seq->lcs_space));
}
mutex_unlock(&seq->lcs_mutex);
return count;
}
static int
lprocfs_fid_space_seq_show(struct seq_file *m, void *unused)
{
struct lu_client_seq *seq = (struct lu_client_seq *)m->private;
int rc;
LASSERT(seq != NULL);
mutex_lock(&seq->lcs_mutex);
rc = seq_printf(m, "[%#llx - %#llx]:%x:%s\n", PRANGE(&seq->lcs_space));
mutex_unlock(&seq->lcs_mutex);
return rc;
}
static ssize_t lprocfs_fid_width_seq_write(struct file *file,
const char __user *buffer,
size_t count, loff_t *off)
{
struct lu_client_seq *seq;
__u64 max;
int rc, val;
seq = ((struct seq_file *)file->private_data)->private;
LASSERT(seq != NULL);
rc = lprocfs_write_helper(buffer, count, &val);
if (rc)
return rc;
mutex_lock(&seq->lcs_mutex);
if (seq->lcs_type == LUSTRE_SEQ_DATA)
max = LUSTRE_DATA_SEQ_MAX_WIDTH;
else
max = LUSTRE_METADATA_SEQ_MAX_WIDTH;
if (val <= max && val > 0) {
seq->lcs_width = val;
if (rc == 0) {
CDEBUG(D_INFO, "%s: Sequence size: %llu\n",
seq->lcs_name, seq->lcs_width);
}
}
mutex_unlock(&seq->lcs_mutex);
return count;
}
static int
lprocfs_fid_width_seq_show(struct seq_file *m, void *unused)
{
struct lu_client_seq *seq = (struct lu_client_seq *)m->private;
int rc;
LASSERT(seq != NULL);
mutex_lock(&seq->lcs_mutex);
rc = seq_printf(m, "%llu\n", seq->lcs_width);
mutex_unlock(&seq->lcs_mutex);
return rc;
}
static int
lprocfs_fid_fid_seq_show(struct seq_file *m, void *unused)
{
struct lu_client_seq *seq = (struct lu_client_seq *)m->private;
int rc;
LASSERT(seq != NULL);
mutex_lock(&seq->lcs_mutex);
rc = seq_printf(m, DFID"\n", PFID(&seq->lcs_fid));
mutex_unlock(&seq->lcs_mutex);
return rc;
}
static int
lprocfs_fid_server_seq_show(struct seq_file *m, void *unused)
{
struct lu_client_seq *seq = (struct lu_client_seq *)m->private;
struct client_obd *cli;
int rc;
LASSERT(seq != NULL);
if (seq->lcs_exp != NULL) {
cli = &seq->lcs_exp->exp_obd->u.cli;
rc = seq_printf(m, "%s\n", cli->cl_target_uuid.uuid);
} else {
rc = seq_printf(m, "%s\n", seq->lcs_srv->lss_name);
}
return rc;
}
LPROC_SEQ_FOPS(lprocfs_fid_space);
LPROC_SEQ_FOPS(lprocfs_fid_width);
LPROC_SEQ_FOPS_RO(lprocfs_fid_server);
LPROC_SEQ_FOPS_RO(lprocfs_fid_fid);
struct lprocfs_vars seq_client_proc_list[] = {
{ "space", &lprocfs_fid_space_fops },
{ "width", &lprocfs_fid_width_fops },
{ "server", &lprocfs_fid_server_fops },
{ "fid", &lprocfs_fid_fid_fops },
{ NULL }
};
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