1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
|
/*
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 "changelog-messages.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_msg(this->name, GF_LOG_INFO, 0, CHANGELOG_MSG_BARRIER_INFO,
"Dequeuing all the changelog barriered fops");
while ((stub = __chlog_barrier_dequeue(this, queue)))
call_resume(stub);
gf_msg(this->name, GF_LOG_INFO, 0, CHANGELOG_MSG_BARRIER_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_msg(this->name, GF_LOG_ERROR, 0, CHANGELOG_MSG_BARRIER_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_msg(this->name, GF_LOG_CRITICAL, 0, CHANGELOG_MSG_BARRIER_ERROR,
"Couldn't add changelog barrier timeout event.");
goto out;
}
priv->barrier_enabled = _gf_true;
ret = 0;
out:
return ret;
}
|
