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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) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2012, 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/seq_file.h>
#include <linux/statfs.h>
#include "../include/lprocfs_status.h"
#include "../include/obd_class.h"
#include "lmv_internal.h"
static int lmv_numobd_seq_show(struct seq_file *m, void *v)
{
struct obd_device *dev = (struct obd_device *)m->private;
struct lmv_desc *desc;
LASSERT(dev != NULL);
desc = &dev->u.lmv.desc;
seq_printf(m, "%u\n", desc->ld_tgt_count);
return 0;
}
LPROC_SEQ_FOPS_RO(lmv_numobd);
static const char *placement_name[] = {
[PLACEMENT_CHAR_POLICY] = "CHAR",
[PLACEMENT_NID_POLICY] = "NID",
[PLACEMENT_INVAL_POLICY] = "INVAL"
};
static enum placement_policy placement_name2policy(char *name, int len)
{
int i;
for (i = 0; i < PLACEMENT_MAX_POLICY; i++) {
if (!strncmp(placement_name[i], name, len))
return i;
}
return PLACEMENT_INVAL_POLICY;
}
static const char *placement_policy2name(enum placement_policy placement)
{
LASSERT(placement < PLACEMENT_MAX_POLICY);
return placement_name[placement];
}
static int lmv_placement_seq_show(struct seq_file *m, void *v)
{
struct obd_device *dev = (struct obd_device *)m->private;
struct lmv_obd *lmv;
LASSERT(dev != NULL);
lmv = &dev->u.lmv;
seq_printf(m, "%s\n", placement_policy2name(lmv->lmv_placement));
return 0;
}
#define MAX_POLICY_STRING_SIZE 64
static ssize_t lmv_placement_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;
char dummy[MAX_POLICY_STRING_SIZE + 1];
int len = count;
enum placement_policy policy;
struct lmv_obd *lmv;
if (copy_from_user(dummy, buffer, MAX_POLICY_STRING_SIZE))
return -EFAULT;
LASSERT(dev != NULL);
lmv = &dev->u.lmv;
if (len > MAX_POLICY_STRING_SIZE)
len = MAX_POLICY_STRING_SIZE;
if (dummy[len - 1] == '\n')
len--;
dummy[len] = '\0';
policy = placement_name2policy(dummy, len);
if (policy != PLACEMENT_INVAL_POLICY) {
spin_lock(&lmv->lmv_lock);
lmv->lmv_placement = policy;
spin_unlock(&lmv->lmv_lock);
} else {
CERROR("Invalid placement policy \"%s\"!\n", dummy);
return -EINVAL;
}
return count;
}
LPROC_SEQ_FOPS(lmv_placement);
static int lmv_activeobd_seq_show(struct seq_file *m, void *v)
{
struct obd_device *dev = (struct obd_device *)m->private;
struct lmv_desc *desc;
LASSERT(dev != NULL);
desc = &dev->u.lmv.desc;
seq_printf(m, "%u\n", desc->ld_active_tgt_count);
return 0;
}
LPROC_SEQ_FOPS_RO(lmv_activeobd);
static int lmv_desc_uuid_seq_show(struct seq_file *m, void *v)
{
struct obd_device *dev = (struct obd_device *)m->private;
struct lmv_obd *lmv;
LASSERT(dev != NULL);
lmv = &dev->u.lmv;
seq_printf(m, "%s\n", lmv->desc.ld_uuid.uuid);
return 0;
}
LPROC_SEQ_FOPS_RO(lmv_desc_uuid);
static void *lmv_tgt_seq_start(struct seq_file *p, loff_t *pos)
{
struct obd_device *dev = p->private;
struct lmv_obd *lmv = &dev->u.lmv;
return (*pos >= lmv->desc.ld_tgt_count) ? NULL : lmv->tgts[*pos];
}
static void lmv_tgt_seq_stop(struct seq_file *p, void *v)
{
return;
}
static void *lmv_tgt_seq_next(struct seq_file *p, void *v, loff_t *pos)
{
struct obd_device *dev = p->private;
struct lmv_obd *lmv = &dev->u.lmv;
++*pos;
return (*pos >= lmv->desc.ld_tgt_count) ? NULL : lmv->tgts[*pos];
}
static int lmv_tgt_seq_show(struct seq_file *p, void *v)
{
struct lmv_tgt_desc *tgt = v;
if (tgt == NULL)
return 0;
seq_printf(p, "%d: %s %sACTIVE\n",
tgt->ltd_idx, tgt->ltd_uuid.uuid,
tgt->ltd_active ? "" : "IN");
return 0;
}
static struct seq_operations lmv_tgt_sops = {
.start = lmv_tgt_seq_start,
.stop = lmv_tgt_seq_stop,
.next = lmv_tgt_seq_next,
.show = lmv_tgt_seq_show,
};
static int lmv_target_seq_open(struct inode *inode, struct file *file)
{
struct seq_file *seq;
int rc;
rc = seq_open(file, &lmv_tgt_sops);
if (rc)
return rc;
seq = file->private_data;
seq->private = PDE_DATA(inode);
return 0;
}
LPROC_SEQ_FOPS_RO_TYPE(lmv, uuid);
static struct lprocfs_vars lprocfs_lmv_obd_vars[] = {
{ "numobd", &lmv_numobd_fops, NULL, 0 },
{ "placement", &lmv_placement_fops, NULL, 0 },
{ "activeobd", &lmv_activeobd_fops, NULL, 0 },
{ "uuid", &lmv_uuid_fops, NULL, 0 },
{ "desc_uuid", &lmv_desc_uuid_fops, NULL, 0 },
{ NULL }
};
LPROC_SEQ_FOPS_RO_TYPE(lmv, numrefs);
static struct lprocfs_vars lprocfs_lmv_module_vars[] = {
{ "num_refs", &lmv_numrefs_fops, NULL, 0 },
{ NULL }
};
struct file_operations lmv_proc_target_fops = {
.owner = THIS_MODULE,
.open = lmv_target_seq_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
void lprocfs_lmv_init_vars(struct lprocfs_static_vars *lvars)
{
lvars->module_vars = lprocfs_lmv_module_vars;
lvars->obd_vars = lprocfs_lmv_obd_vars;
}
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