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
134
135
136
137
138
139
140
141
142
143
144
145
|
/*
Unix SMB/CIFS implementation.
Copyright (C) Stefan Metzmacher 2008
This program 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.
This program 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/>.
*/
/*
abstract the various kernel interfaces to leases (oplocks) into a
single Samba friendly interface
*/
#include "includes.h"
#include "system/filesys.h"
#include "ntvfs/sysdep/sys_lease.h"
#include "../lib/util/dlinklist.h"
#include "param/param.h"
/* list of registered backends */
static struct sys_lease_ops *backends;
static uint32_t num_backends;
#define LEASE_BACKEND "lease:backend"
/*
initialise a system change notify backend
*/
_PUBLIC_ struct sys_lease_context *sys_lease_context_create(struct share_config *scfg,
TALLOC_CTX *mem_ctx,
struct event_context *ev,
struct messaging_context *msg,
sys_lease_send_break_fn break_send)
{
struct sys_lease_context *ctx;
const char *bname;
int i;
NTSTATUS status;
if (num_backends == 0) {
return NULL;
}
if (ev == NULL) {
return NULL;
}
ctx = talloc_zero(mem_ctx, struct sys_lease_context);
if (ctx == NULL) {
return NULL;
}
ctx->event_ctx = ev;
ctx->msg_ctx = msg;
ctx->break_send = break_send;
bname = share_string_option(scfg, LEASE_BACKEND, NULL);
if (!bname) {
talloc_free(ctx);
return NULL;
}
for (i=0;i<num_backends;i++) {
if (strcasecmp(backends[i].name, bname) == 0) {
ctx->ops = &backends[i];
break;
}
}
if (!ctx->ops) {
talloc_free(ctx);
return NULL;
}
status = ctx->ops->init(ctx);
if (!NT_STATUS_IS_OK(status)) {
talloc_free(ctx);
return NULL;
}
return ctx;
}
/*
register a lease backend
*/
_PUBLIC_ NTSTATUS sys_lease_register(const struct sys_lease_ops *backend)
{
struct sys_lease_ops *b;
b = talloc_realloc(talloc_autofree_context(), backends,
struct sys_lease_ops, num_backends+1);
NT_STATUS_HAVE_NO_MEMORY(b);
backends = b;
backends[num_backends] = *backend;
num_backends++;
return NT_STATUS_OK;
}
#ifndef STATIC_sys_lease_MODULES
#define STATIC_sys_lease_MODULES NULL
#endif
_PUBLIC_ NTSTATUS sys_lease_init(void)
{
static bool initialized = false;
extern NTSTATUS sys_lease_linux_init(void);
init_module_fn static_init[] = { STATIC_sys_lease_MODULES };
if (initialized) return NT_STATUS_OK;
initialized = true;
run_init_functions(static_init);
return NT_STATUS_OK;
}
NTSTATUS sys_lease_setup(struct sys_lease_context *ctx,
struct opendb_entry *e)
{
return ctx->ops->setup(ctx, e);
}
NTSTATUS sys_lease_update(struct sys_lease_context *ctx,
struct opendb_entry *e)
{
return ctx->ops->update(ctx, e);
}
NTSTATUS sys_lease_remove(struct sys_lease_context *ctx,
struct opendb_entry *e)
{
return ctx->ops->remove(ctx, e);
}
|
