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/*
Copyright (c) 2014 Red Hat, Inc. <http://www.redhat.com>
This file is part of GlusterFS.
This file is licensed to you under your choice of the GNU Lesser
General Public License, version 3 or any later version (LGPLv3 or
later), or the GNU General Public License, version 2 (GPLv2), in all
cases as published by the Free Software Foundation.
*/
#include "changelog-helpers.h"
#include "call-stub.h"
/* Enqueue a stub*/
void
__chlog_barrier_enqueue (xlator_t *this, call_stub_t *stub)
{
changelog_priv_t *priv = NULL;
priv = this->private;
GF_ASSERT (priv);
list_add_tail (&stub->list, &priv->queue);
priv->queue_size++;
return;
}
/* Dequeue a stub */
call_stub_t *
__chlog_barrier_dequeue (xlator_t *this, struct list_head *queue)
{
call_stub_t *stub = NULL;
changelog_priv_t *priv = NULL;
priv = this->private;
GF_ASSERT (priv);
if (list_empty (queue))
goto out;
stub = list_entry (queue->next, call_stub_t, list);
list_del_init (&stub->list);
out:
return stub;
}
/* Dequeue all the stubs and call corresponding resume functions */
void
chlog_barrier_dequeue_all (xlator_t *this, struct list_head *queue)
{
call_stub_t *stub = NULL;
gf_log (this->name, GF_LOG_INFO,
"Dequeuing all the changelog barriered fops");
while ((stub = __chlog_barrier_dequeue (this, queue)))
call_resume (stub);
gf_log (this->name, GF_LOG_INFO,
"Dequeuing changelog barriered fops is finished");
return;
}
/* Function called on changelog barrier timeout */
void
chlog_barrier_timeout (void *data)
{
xlator_t *this = NULL;
changelog_priv_t *priv = NULL;
struct list_head queue = {0,};
this = data;
THIS = this;
priv = this->private;
INIT_LIST_HEAD (&queue);
gf_log (this->name, GF_LOG_ERROR,
"Disabling changelog barrier because of the timeout.");
LOCK (&priv->lock);
{
__chlog_barrier_disable (this, &queue);
}
UNLOCK (&priv->lock);
chlog_barrier_dequeue_all (this, &queue);
return;
}
/* Disable changelog barrier enable flag */
void
__chlog_barrier_disable (xlator_t *this, struct list_head *queue)
{
changelog_priv_t *priv = this->private;
GF_ASSERT (priv);
if (priv->timer) {
gf_timer_call_cancel (this->ctx, priv->timer);
priv->timer = NULL;
}
list_splice_init (&priv->queue, queue);
priv->queue_size = 0;
priv->barrier_enabled = _gf_false;
}
/* Enable chagelog barrier enable with timer */
int
__chlog_barrier_enable (xlator_t *this, changelog_priv_t *priv)
{
int ret = -1;
priv->timer = gf_timer_call_after (this->ctx, priv->timeout,
chlog_barrier_timeout, (void *)this);
if (!priv->timer) {
gf_log (this->name, GF_LOG_CRITICAL,
"Couldn't add changelog barrier timeout event.");
goto out;
}
priv->barrier_enabled = _gf_true;
ret = 0;
out:
return ret;
}
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