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
|
/*
Copyright (c) 2008-2012 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 "lock-table.h"
#include "common-utils.h"
struct _lock_table *
gf_lock_table_new (void)
{
struct _lock_table *new = NULL;
new = GF_CALLOC (1, sizeof (struct _lock_table), gf_common_mt_lock_table);
if (new == NULL) {
goto out;
}
INIT_LIST_HEAD (&new->entrylk_lockers);
INIT_LIST_HEAD (&new->inodelk_lockers);
LOCK_INIT (&new->lock);
out:
return new;
}
int
gf_add_locker (struct _lock_table *table, const char *volume,
loc_t *loc, fd_t *fd, pid_t pid, gf_lkowner_t *owner,
glusterfs_fop_t type)
{
int32_t ret = -1;
struct _locker *new = NULL;
GF_VALIDATE_OR_GOTO ("lock-table", table, out);
GF_VALIDATE_OR_GOTO ("lock-table", volume, out);
new = GF_CALLOC (1, sizeof (struct _locker), gf_common_mt_locker);
if (new == NULL) {
goto out;
}
INIT_LIST_HEAD (&new->lockers);
new->volume = gf_strdup (volume);
if (fd == NULL) {
loc_copy (&new->loc, loc);
} else {
new->fd = fd_ref (fd);
}
new->pid = pid;
new->owner = *owner;
LOCK (&table->lock);
{
if (type == GF_FOP_ENTRYLK)
list_add_tail (&new->lockers, &table->entrylk_lockers);
else
list_add_tail (&new->lockers, &table->inodelk_lockers);
}
UNLOCK (&table->lock);
out:
return ret;
}
int
gf_del_locker (struct _lock_table *table, const char *volume,
loc_t *loc, fd_t *fd, gf_lkowner_t *owner, glusterfs_fop_t type)
{
struct _locker *locker = NULL;
struct _locker *tmp = NULL;
int32_t ret = -1;
struct list_head *head = NULL;
struct list_head del;
GF_VALIDATE_OR_GOTO ("lock-table", table, out);
GF_VALIDATE_OR_GOTO ("lock-table", volume, out);
INIT_LIST_HEAD (&del);
LOCK (&table->lock);
{
if (type == GF_FOP_ENTRYLK) {
head = &table->entrylk_lockers;
} else {
head = &table->inodelk_lockers;
}
list_for_each_entry_safe (locker, tmp, head, lockers) {
if (!is_same_lkowner (&locker->owner, owner) ||
strcmp (locker->volume, volume))
continue;
if (locker->fd && fd && (locker->fd == fd))
list_move_tail (&locker->lockers, &del);
else if (locker->loc.inode && loc &&
(locker->loc.inode == loc->inode))
list_move_tail (&locker->lockers, &del);
}
}
UNLOCK (&table->lock);
tmp = NULL;
locker = NULL;
list_for_each_entry_safe (locker, tmp, &del, lockers) {
list_del_init (&locker->lockers);
if (locker->fd)
fd_unref (locker->fd);
else
loc_wipe (&locker->loc);
GF_FREE (locker->volume);
GF_FREE (locker);
}
ret = 0;
out:
return ret;
}
|