2 * Unix SMB/CIFS implementation.
4 * Copyright (C) Volker Lendecke 2014
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 #include "librpc/gen_ndr/notify.h"
22 #include "librpc/gen_ndr/messaging.h"
23 #include "lib/dbwrap/dbwrap.h"
24 #include "lib/dbwrap/dbwrap_rbt.h"
25 #include "lib/util/server_id.h"
31 #include "lib/util/server_id_db.h"
32 #include "smbd/notifyd/notifyd.h"
34 struct notify_context {
35 struct server_id notifyd;
36 struct messaging_context *msg_ctx;
38 struct smbd_server_connection *sconn;
39 void (*callback)(struct smbd_server_connection *sconn,
40 void *private_data, struct timespec when,
41 const struct notify_event *ctx);
44 static void notify_handler(struct messaging_context *msg, void *private_data,
45 uint32_t msg_type, struct server_id src,
47 static int notify_context_destructor(struct notify_context *ctx);
49 struct notify_context *notify_init(
50 TALLOC_CTX *mem_ctx, struct messaging_context *msg,
51 struct tevent_context *ev,
52 struct smbd_server_connection *sconn,
53 void (*callback)(struct smbd_server_connection *sconn,
54 void *, struct timespec,
55 const struct notify_event *))
57 struct server_id_db *names_db;
58 struct notify_context *ctx;
61 ctx = talloc(mem_ctx, struct notify_context);
68 ctx->callback = callback;
70 names_db = messaging_names_db(msg);
71 if (!server_id_db_lookup_one(names_db, "notify-daemon",
73 DEBUG(1, ("No notify daemon around\n"));
79 struct server_id_buf tmp;
80 DBG_DEBUG("notifyd=%s\n",
81 server_id_str_buf(ctx->notifyd, &tmp));
84 if (callback != NULL) {
85 status = messaging_register(msg, ctx, MSG_PVFS_NOTIFY,
87 if (!NT_STATUS_IS_OK(status)) {
88 DEBUG(1, ("messaging_register failed: %s\n",
95 talloc_set_destructor(ctx, notify_context_destructor);
100 static int notify_context_destructor(struct notify_context *ctx)
102 if (ctx->callback != NULL) {
103 messaging_deregister(ctx->msg_ctx, MSG_PVFS_NOTIFY, ctx);
109 static void notify_handler(struct messaging_context *msg, void *private_data,
110 uint32_t msg_type, struct server_id src,
113 struct notify_context *ctx = talloc_get_type_abort(
114 private_data, struct notify_context);
115 struct notify_event_msg *event_msg;
116 struct notify_event event;
118 if (data->length < offsetof(struct notify_event_msg, path) + 1) {
119 DEBUG(1, ("message too short: %u\n", (unsigned)data->length));
122 if (data->data[data->length-1] != 0) {
123 DEBUG(1, ("%s: path not 0-terminated\n", __func__));
127 event_msg = (struct notify_event_msg *)data->data;
129 event.action = event_msg->action;
130 event.path = event_msg->path;
131 event.private_data = event_msg->private_data;
133 DEBUG(10, ("%s: Got notify_event action=%u, private_data=%p, "
134 "path=%s\n", __func__, (unsigned)event.action,
135 event.private_data, event.path));
137 ctx->callback(ctx->sconn, event.private_data, event_msg->when, &event);
140 NTSTATUS notify_add(struct notify_context *ctx,
141 const char *path, uint32_t filter, uint32_t subdir_filter,
144 struct notify_rec_change_msg msg = {};
150 return NT_STATUS_NOT_IMPLEMENTED;
153 DEBUG(10, ("%s: path=[%s], filter=%u, subdir_filter=%u, "
154 "private_data=%p\n", __func__, path, (unsigned)filter,
155 (unsigned)subdir_filter, private_data));
157 pathlen = strlen(path)+1;
159 clock_gettime_mono(&msg.instance.creation_time);
160 msg.instance.filter = filter;
161 msg.instance.subdir_filter = subdir_filter;
162 msg.instance.private_data = private_data;
164 iov[0].iov_base = &msg;
165 iov[0].iov_len = offsetof(struct notify_rec_change_msg, path);
166 iov[1].iov_base = discard_const_p(char, path);
167 iov[1].iov_len = pathlen;
169 status = messaging_send_iov(
170 ctx->msg_ctx, ctx->notifyd, MSG_SMB_NOTIFY_REC_CHANGE,
171 iov, ARRAY_SIZE(iov), NULL, 0);
173 if (!NT_STATUS_IS_OK(status)) {
174 DEBUG(10, ("messaging_send_iov returned %s\n",
182 NTSTATUS notify_remove(struct notify_context *ctx, void *private_data,
185 struct notify_rec_change_msg msg = {};
189 /* see if change notify is enabled at all */
191 return NT_STATUS_NOT_IMPLEMENTED;
194 msg.instance.private_data = private_data;
196 iov[0].iov_base = &msg;
197 iov[0].iov_len = offsetof(struct notify_rec_change_msg, path);
198 iov[1].iov_base = path;
199 iov[1].iov_len = strlen(path)+1;
201 status = messaging_send_iov(
202 ctx->msg_ctx, ctx->notifyd, MSG_SMB_NOTIFY_REC_CHANGE,
203 iov, ARRAY_SIZE(iov), NULL, 0);
208 void notify_trigger(struct notify_context *ctx,
209 uint32_t action, uint32_t filter,
210 const char *dir, const char *name)
212 struct notify_trigger_msg msg;
216 DEBUG(10, ("notify_trigger called action=0x%x, filter=0x%x, "
217 "dir=%s, name=%s\n", (unsigned)action, (unsigned)filter,
224 msg.when = timespec_current();
228 iov[0].iov_base = &msg;
229 iov[0].iov_len = offsetof(struct notify_trigger_msg, path);
230 iov[1].iov_base = discard_const_p(char, dir);
231 iov[1].iov_len = strlen(dir);
232 iov[2].iov_base = &slash;
234 iov[3].iov_base = discard_const_p(char, name);
235 iov[3].iov_len = strlen(name)+1;
238 ctx->msg_ctx, ctx->notifyd, MSG_SMB_NOTIFY_TRIGGER,
239 iov, ARRAY_SIZE(iov), NULL, 0);
242 NTSTATUS notify_walk(struct notify_context *notify,
243 bool (*fn)(const char *path, struct server_id server,
244 const struct notify_instance *instance,
248 struct tevent_context *ev;
249 struct tevent_req *req;
250 struct messaging_rec *rec;
256 ev = samba_tevent_context_init(notify);
258 return NT_STATUS_NO_MEMORY;
261 req = messaging_read_send(ev, ev, notify->msg_ctx, MSG_SMB_NOTIFY_DB);
264 return NT_STATUS_NO_MEMORY;
267 ok = tevent_req_set_endtime(req, ev, timeval_current_ofs(10, 0));
270 return NT_STATUS_NO_MEMORY;
273 status = messaging_send_buf(notify->msg_ctx, notify->notifyd,
274 MSG_SMB_NOTIFY_GET_DB, NULL, 0);
275 if (!NT_STATUS_IS_OK(status)) {
276 DEBUG(10, ("%s: messaging_send_buf failed\n",
282 ok = tevent_req_poll(req, ev);
284 DEBUG(10, ("%s: tevent_req_poll failed\n", __func__));
286 return NT_STATUS_INTERNAL_ERROR;
289 ret = messaging_read_recv(req, ev, &rec);
291 DEBUG(10, ("%s: messaging_read_recv failed: %s\n",
292 __func__, strerror(ret)));
294 return map_nt_error_from_unix(ret);
297 ret = notifyd_parse_db(rec->buf.data, rec->buf.length, &log_idx,
300 DEBUG(10, ("%s: notifyd_parse_db failed: %s\n",
301 __func__, strerror(ret)));
303 return map_nt_error_from_unix(ret);