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/*
Copyright (c) 2009 Z RESEARCH, Inc. <http://www.zresearch.com>
This file is part of GlusterFS.
GlusterFS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 3 of the License,
or (at your option) any later version.
GlusterFS 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 for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see
<http://www.gnu.org/licenses/>.
*/
#ifndef _CONFIG_H
#define _CONFIG_H
#include "config.h"
#endif
/* TODO: add NS locking */
#include "glusterfs.h"
#include "xlator.h"
#include "dht-common.h"
#include "defaults.h"
#include <sys/time.h>
int
dht_du_info_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
int op_ret, int op_errno, struct statvfs *statvfs)
{
dht_conf_t *conf = NULL;
dht_local_t *local = NULL;
call_frame_t *prev = NULL;
int this_call_cnt = 0;
int i = 0;
double percent = 0;
local = frame->local;
conf = this->private;
prev = cookie;
if (op_ret == -1)
goto out;
percent = (statvfs->f_bfree * 100) / statvfs->f_blocks;
LOCK (&conf->subvolume_lock);
{
for (i = 0; i < conf->subvolume_cnt; i++)
if (prev->this == conf->subvolumes[i])
conf->du_stats[i].avail_percent = percent;
}
UNLOCK (&conf->subvolume_lock);
out:
this_call_cnt = dht_frame_return (frame);
if (is_last_call (this_call_cnt))
DHT_STACK_DESTROY (frame);
return 0;
}
int
dht_get_du_info_for_subvol (xlator_t *this, int subvol_idx)
{
dht_conf_t *conf = NULL;
call_frame_t *statfs_frame = NULL;
dht_local_t *statfs_local = NULL;
call_pool_t *pool = NULL;
conf = this->private;
pool = this->ctx->pool;
statfs_frame = create_frame (this, pool);
if (!statfs_frame) {
gf_log (this->name, GF_LOG_ERROR,
"memory allocation failed :(");
goto err;
}
statfs_local = dht_local_init (statfs_frame);
if (!statfs_local) {
gf_log (this->name, GF_LOG_ERROR,
"memory allocation failed :(");
goto err;
}
loc_t tmp_loc = { .inode = NULL,
.path = "/",
};
statfs_local->call_cnt = 1;
STACK_WIND (statfs_frame, dht_du_info_cbk,
conf->subvolumes[subvol_idx],
conf->subvolumes[subvol_idx]->fops->statfs,
&tmp_loc);
return 0;
err:
if (statfs_frame)
DHT_STACK_DESTROY (statfs_frame);
return -1;
}
int
dht_get_du_info (call_frame_t *frame, xlator_t *this, loc_t *loc)
{
int i = 0;
dht_conf_t *conf = NULL;
call_frame_t *statfs_frame = NULL;
dht_local_t *statfs_local = NULL;
struct timeval tv = {0,};
conf = this->private;
gettimeofday (&tv, NULL);
if (tv.tv_sec > (conf->refresh_interval
+ conf->last_stat_fetch.tv_sec)) {
statfs_frame = copy_frame (frame);
if (!statfs_frame) {
gf_log (this->name, GF_LOG_ERROR,
"memory allocation failed :(");
goto err;
}
statfs_local = dht_local_init (statfs_frame);
if (!statfs_local) {
gf_log (this->name, GF_LOG_ERROR,
"memory allocation failed :(");
goto err;
}
loc_copy (&statfs_local->loc, loc);
loc_t tmp_loc = { .inode = NULL,
.path = "/",
};
statfs_local->call_cnt = conf->subvolume_cnt;
for (i = 0; i < conf->subvolume_cnt; i++) {
STACK_WIND (statfs_frame, dht_du_info_cbk,
conf->subvolumes[i],
conf->subvolumes[i]->fops->statfs,
&tmp_loc);
}
conf->last_stat_fetch.tv_sec = tv.tv_sec;
}
return 0;
err:
if (statfs_frame)
DHT_STACK_DESTROY (statfs_frame);
return -1;
}
int
dht_is_subvol_filled (xlator_t *this, xlator_t *subvol)
{
int i = 0;
int subvol_filled = 0;
dht_conf_t *conf = NULL;
conf = this->private;
/* Check for values above 90% free disk */
LOCK (&conf->subvolume_lock);
{
for (i = 0; i < conf->subvolume_cnt; i++) {
if ((subvol == conf->subvolumes[i]) &&
(conf->du_stats[i].avail_percent <
conf->min_free_disk)) {
subvol_filled = 1;
break;
}
}
}
UNLOCK (&conf->subvolume_lock);
if (subvol_filled) {
if (!(conf->du_stats[i].log++ % GF_UNIVERSAL_ANSWER)) {
gf_log (this->name, GF_LOG_CRITICAL,
"disk space on subvolume '%s' is getting "
"full (%.2f %%), consider adding more nodes",
subvol->name,
(100 - conf->du_stats[i].avail_percent));
}
}
return subvol_filled;
}
xlator_t *
dht_free_disk_available_subvol (xlator_t *this, xlator_t *subvol)
{
int i = 0;
double max_avail = 0;
xlator_t *avail_subvol = NULL;
dht_conf_t *conf = NULL;
conf = this->private;
avail_subvol = subvol;
LOCK (&conf->subvolume_lock);
{
for (i = 0; i < conf->subvolume_cnt; i++) {
if (conf->du_stats[i].avail_percent > max_avail) {
max_avail = conf->du_stats[i].avail_percent;
avail_subvol = conf->subvolumes[i];
}
}
}
UNLOCK (&conf->subvolume_lock);
if (max_avail < conf->min_free_disk)
avail_subvol = subvol;
if (avail_subvol == subvol) {
gf_log (this->name, GF_LOG_CRITICAL,
"no node has enough free space to schedule create");
}
return avail_subvol;
}
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