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
133
|
/*
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;
/*
* It is possible for inodelk lock to come on anon-fd
* and inodelk unlock to come on normal fd in case of
* client re-opens. So don't check for fds to be equal.
*/
if (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;
}
|
