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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) 2012, 2013, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Lustre is a trademark of Sun Microsystems, Inc.
*
* lustre/fld/lproc_fld.c
*
* FLD (FIDs Location Database)
*
* Author: Yury Umanets <umka@clusterfs.com>
* Di Wang <di.wang@whamcloud.com>
*/
#define DEBUG_SUBSYSTEM S_FLD
#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_fld.h"
#include "../include/lustre_fid.h"
#include "fld_internal.h"
static int
fld_proc_targets_seq_show(struct seq_file *m, void *unused)
{
struct lu_client_fld *fld = (struct lu_client_fld *)m->private;
struct lu_fld_target *target;
LASSERT(fld != NULL);
spin_lock(&fld->lcf_lock);
list_for_each_entry(target,
&fld->lcf_targets, ft_chain)
seq_printf(m, "%s\n", fld_target_name(target));
spin_unlock(&fld->lcf_lock);
return 0;
}
static int
fld_proc_hash_seq_show(struct seq_file *m, void *unused)
{
struct lu_client_fld *fld = (struct lu_client_fld *)m->private;
LASSERT(fld != NULL);
spin_lock(&fld->lcf_lock);
seq_printf(m, "%s\n", fld->lcf_hash->fh_name);
spin_unlock(&fld->lcf_lock);
return 0;
}
static ssize_t
fld_proc_hash_seq_write(struct file *file,
const char __user *buffer,
size_t count, loff_t *off)
{
struct lu_client_fld *fld;
struct lu_fld_hash *hash = NULL;
char fh_name[8];
int i;
if (count > sizeof(fh_name))
return -ENAMETOOLONG;
if (copy_from_user(fh_name, buffer, count) != 0)
return -EFAULT;
fld = ((struct seq_file *)file->private_data)->private;
LASSERT(fld != NULL);
for (i = 0; fld_hash[i].fh_name != NULL; i++) {
if (count != strlen(fld_hash[i].fh_name))
continue;
if (!strncmp(fld_hash[i].fh_name, fh_name, count)) {
hash = &fld_hash[i];
break;
}
}
if (hash != NULL) {
spin_lock(&fld->lcf_lock);
fld->lcf_hash = hash;
spin_unlock(&fld->lcf_lock);
CDEBUG(D_INFO, "%s: Changed hash to \"%s\"\n",
fld->lcf_name, hash->fh_name);
}
return count;
}
static ssize_t
fld_proc_cache_flush_write(struct file *file, const char __user *buffer,
size_t count, loff_t *pos)
{
struct lu_client_fld *fld = file->private_data;
LASSERT(fld != NULL);
fld_cache_flush(fld->lcf_cache);
CDEBUG(D_INFO, "%s: Lookup cache is flushed\n", fld->lcf_name);
return count;
}
static int fld_proc_cache_flush_open(struct inode *inode, struct file *file)
{
file->private_data = PDE_DATA(inode);
return 0;
}
static int fld_proc_cache_flush_release(struct inode *inode, struct file *file)
{
file->private_data = NULL;
return 0;
}
static struct file_operations fld_proc_cache_flush_fops = {
.owner = THIS_MODULE,
.open = fld_proc_cache_flush_open,
.write = fld_proc_cache_flush_write,
.release = fld_proc_cache_flush_release,
};
LPROC_SEQ_FOPS_RO(fld_proc_targets);
LPROC_SEQ_FOPS(fld_proc_hash);
struct lprocfs_vars fld_client_proc_list[] = {
{ "targets", &fld_proc_targets_fops },
{ "hash", &fld_proc_hash_fops },
{ "cache_flush", &fld_proc_cache_flush_fops },
{ NULL }};
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