2 Unix SMB/CIFS implementation.
4 Copyright (C) Andrew Tridgell 2006
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
21 abstract the various kernel interfaces to change notify into a
22 single Samba friendly interface
26 #include "system/filesys.h"
27 #include "ntvfs/sysdep/sys_notify.h"
28 #include "lib/events/events.h"
29 #include "../lib/util/dlinklist.h"
30 #include "param/param.h"
32 /* list of registered backends */
33 static struct sys_notify_backend *backends;
34 static uint32_t num_backends;
36 #define NOTIFY_BACKEND "notify:backend"
39 initialise a system change notify backend
41 _PUBLIC_ struct sys_notify_context *sys_notify_context_create(struct share_config *scfg,
43 struct event_context *ev)
45 struct sys_notify_context *ctx;
49 if (num_backends == 0) {
57 ctx = talloc_zero(mem_ctx, struct sys_notify_context);
64 bname = share_string_option(scfg, NOTIFY_BACKEND, NULL);
67 bname = backends[0].name;
69 bname = "__unknown__";
73 for (i=0;i<num_backends;i++) {
74 char *enable_opt_name;
77 enable_opt_name = talloc_asprintf(mem_ctx, "notify:%s",
79 enabled = share_bool_option(scfg, enable_opt_name, true);
80 talloc_free(enable_opt_name);
85 if (strcasecmp(backends[i].name, bname) == 0) {
86 bname = backends[i].name;
92 ctx->notify_watch = NULL;
94 if (i < num_backends) {
95 ctx->notify_watch = backends[i].notify_watch;
104 note that this call must modify the e->filter and e->subdir_filter
105 bits to remove ones handled by this backend. Any remaining bits will
106 be handled by the generic notify layer
108 _PUBLIC_ NTSTATUS sys_notify_watch(struct sys_notify_context *ctx,
109 struct notify_entry *e,
110 sys_notify_callback_t callback,
111 void *private_data, void *handle)
113 if (!ctx->notify_watch) {
114 return NT_STATUS_INVALID_SYSTEM_SERVICE;
116 return ctx->notify_watch(ctx, e, callback, private_data, handle);
120 register a notify backend
122 _PUBLIC_ NTSTATUS sys_notify_register(struct sys_notify_backend *backend)
124 struct sys_notify_backend *b;
125 b = talloc_realloc(talloc_autofree_context(), backends,
126 struct sys_notify_backend, num_backends+1);
127 NT_STATUS_HAVE_NO_MEMORY(b);
129 backends[num_backends] = *backend;
134 _PUBLIC_ NTSTATUS sys_notify_init(void)
136 static bool initialized = false;
137 extern NTSTATUS sys_notify_inotify_init(void);
139 init_module_fn static_init[] = { STATIC_sys_notify_MODULES };
141 if (initialized) return NT_STATUS_OK;
144 run_init_functions(static_init);