2 Unix SMB/CIFS implementation.
4 Copyright (C) Andrew Tridgell 2000
5 Copyright (C) Jeremy Allison 1994-1998
6 Copyright (C) Volker Lendecke 2007
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 static struct notify_mid_map *notify_changes_by_mid;
28 * For NTCancel, we need to find the notify_change_request indexed by
29 * mid. Separate list here.
32 struct notify_mid_map {
33 struct notify_mid_map *prev, *next;
34 struct notify_change_request *req;
38 static BOOL notify_marshall_changes(int num_changes,
39 struct notify_change *changes,
45 for (i=0; i<num_changes; i++) {
46 struct notify_change *c = &changes[i];
48 uint32 u32_tmp; /* Temp arg to prs_uint32 to avoid
49 * signed/unsigned issues */
51 namelen = convert_string_allocate(
52 NULL, CH_UNIX, CH_UTF16LE, c->name, strlen(c->name)+1,
53 &uni_name.buffer, True);
54 if ((namelen == -1) || (uni_name.buffer == NULL)) {
58 namelen -= 2; /* Dump NULL termination */
61 * Offset to next entry, only if there is one
64 u32_tmp = (i == num_changes-1) ? 0 : namelen + 12;
65 if (!prs_uint32("offset", ps, 1, &u32_tmp)) goto fail;
68 if (!prs_uint32("action", ps, 1, &u32_tmp)) goto fail;
71 if (!prs_uint32("namelen", ps, 1, &u32_tmp)) goto fail;
73 if (!prs_unistr("name", ps, 1, &uni_name)) goto fail;
76 * Not NULL terminated, decrease by the 2 UCS2 \0 chars
78 prs_set_offset(ps, prs_offset(ps)-2);
80 SAFE_FREE(uni_name.buffer);
86 SAFE_FREE(uni_name.buffer);
90 /****************************************************************************
91 Setup the common parts of the return packet and send it.
92 *****************************************************************************/
94 static void change_notify_reply_packet(const char *request_buf,
97 char outbuf[smb_size+38];
99 memset(outbuf, '\0', sizeof(outbuf));
100 construct_reply_common(request_buf, outbuf);
102 ERROR_NT(error_code);
105 * Seems NT needs a transact command with an error code
106 * in it. This is a longer packet than a simple error.
108 set_message(outbuf,18,0,False);
111 if (!send_smb(smbd_server_fd(),outbuf))
112 exit_server_cleanly("change_notify_reply_packet: send_smb "
116 void change_notify_reply(const char *request_buf, uint32 max_param_count,
117 int num_changes, struct notify_change *changes)
121 size_t buflen = smb_size+38+max_param_count;
123 if (num_changes == -1) {
124 change_notify_reply_packet(request_buf, NT_STATUS_OK);
128 if (!prs_init(&ps, 0, NULL, False)
129 || !notify_marshall_changes(num_changes, changes, &ps)) {
130 change_notify_reply_packet(request_buf, NT_STATUS_NO_MEMORY);
134 if (prs_offset(&ps) > max_param_count) {
136 * We exceed what the client is willing to accept. Send
139 change_notify_reply_packet(request_buf, NT_STATUS_OK);
143 if (!(outbuf = SMB_MALLOC_ARRAY(char, buflen))) {
144 change_notify_reply_packet(request_buf, NT_STATUS_NO_MEMORY);
148 construct_reply_common(request_buf, outbuf);
150 if (send_nt_replies(outbuf, buflen, NT_STATUS_OK, prs_data_p(&ps),
151 prs_offset(&ps), NULL, 0) == -1) {
152 exit_server("change_notify_reply_packet: send_smb failed.");
160 NTSTATUS change_notify_add_request(const char *inbuf, uint32 max_param_count,
161 uint32 filter, BOOL recursive,
162 struct files_struct *fsp)
164 struct notify_change_request *request = NULL;
165 struct notify_mid_map *map = NULL;
167 if (!(request = SMB_MALLOC_P(struct notify_change_request))
168 || !(map = SMB_MALLOC_P(struct notify_mid_map))) {
170 return NT_STATUS_NO_MEMORY;
173 request->mid_map = map;
176 memcpy(request->request_buf, inbuf, sizeof(request->request_buf));
177 request->max_param_count = max_param_count;
178 request->filter = filter;
180 request->backend_data = NULL;
182 DLIST_ADD_END(fsp->notify->requests, request,
183 struct notify_change_request *);
185 map->mid = SVAL(inbuf, smb_mid);
186 DLIST_ADD(notify_changes_by_mid, map);
188 /* Push the MID of this packet on the signing queue. */
189 srv_defer_sign_response(SVAL(inbuf,smb_mid));
194 static void change_notify_remove_request(struct notify_change_request *remove_req)
197 struct notify_change_request *req;
200 * Paranoia checks, the fsp referenced must must have the request in
201 * its list of pending requests
204 fsp = remove_req->fsp;
205 SMB_ASSERT(fsp->notify != NULL);
207 for (req = fsp->notify->requests; req; req = req->next) {
208 if (req == remove_req) {
214 smb_panic("notify_req not found in fsp's requests\n");
217 DLIST_REMOVE(fsp->notify->requests, req);
218 DLIST_REMOVE(notify_changes_by_mid, req->mid_map);
219 SAFE_FREE(req->mid_map);
220 TALLOC_FREE(req->backend_data);
224 /****************************************************************************
225 Delete entries by mid from the change notify pending queue. Always send reply.
226 *****************************************************************************/
228 void remove_pending_change_notify_requests_by_mid(uint16 mid)
230 struct notify_mid_map *map;
232 for (map = notify_changes_by_mid; map; map = map->next) {
233 if (map->mid == mid) {
242 change_notify_reply_packet(map->req->request_buf, NT_STATUS_CANCELLED);
243 change_notify_remove_request(map->req);
246 /****************************************************************************
247 Delete entries by fnum from the change notify pending queue.
248 *****************************************************************************/
250 void remove_pending_change_notify_requests_by_fid(files_struct *fsp,
253 if (fsp->notify == NULL) {
257 while (fsp->notify->requests != NULL) {
258 change_notify_reply_packet(
259 fsp->notify->requests->request_buf, status);
260 change_notify_remove_request(fsp->notify->requests);
264 void notify_fname(connection_struct *conn, uint32 action, uint32 filter,
269 if (asprintf(&fullpath, "%s/%s", conn->connectpath, path) == -1) {
270 DEBUG(0, ("asprintf failed\n"));
274 notify_trigger(conn->notify_ctx, action, filter, fullpath);
278 void notify_fsp(files_struct *fsp, uint32 action, const char *name)
280 struct notify_change *change, *changes;
283 if (fsp->notify == NULL) {
285 * Nobody is waiting, don't queue
290 if (!(name2 = talloc_strdup(fsp->notify, name))) {
291 DEBUG(0, ("talloc_strdup failed\n"));
295 string_replace(name2, '/', '\\');
298 * Someone has triggered a notify previously, queue the change for
299 * later. TODO: Limit the number of changes queued, test how filters
300 * apply here. Do we have to store them?
303 if ((fsp->notify->num_changes > 30) || (name == NULL)) {
305 * W2k3 seems to store at most 30 changes.
307 TALLOC_FREE(fsp->notify->changes);
309 fsp->notify->num_changes = -1;
313 if (fsp->notify->num_changes == -1) {
317 if (!(changes = TALLOC_REALLOC_ARRAY(
318 fsp->notify, fsp->notify->changes,
319 struct notify_change, fsp->notify->num_changes+1))) {
320 DEBUG(0, ("talloc_realloc failed\n"));
325 fsp->notify->changes = changes;
327 change = &(fsp->notify->changes[fsp->notify->num_changes]);
329 change->name = talloc_move(changes, &name2);
330 change->action = action;
331 fsp->notify->num_changes += 1;
333 if (fsp->notify->requests == NULL) {
335 * Nobody is waiting, so don't send anything. The ot
340 if (action == NOTIFY_ACTION_OLD_NAME) {
342 * We have to send the two rename events in one reply. So hold
343 * the first part back.
349 * Someone is waiting for the change, trigger the reply immediately.
351 * TODO: do we have to walk the lists of requests pending?
354 change_notify_reply(fsp->notify->requests->request_buf,
355 fsp->notify->requests->max_param_count,
356 fsp->notify->num_changes,
357 fsp->notify->changes);
359 change_notify_remove_request(fsp->notify->requests);
361 TALLOC_FREE(fsp->notify->changes);
362 fsp->notify->num_changes = 0;
365 char *notify_filter_string(TALLOC_CTX *mem_ctx, uint32 filter)
369 result = talloc_strdup(mem_ctx, "");
371 if (filter & FILE_NOTIFY_CHANGE_FILE_NAME)
372 result = talloc_asprintf_append(result, "FILE_NAME|");
373 if (filter & FILE_NOTIFY_CHANGE_DIR_NAME)
374 result = talloc_asprintf_append(result, "DIR_NAME|");
375 if (filter & FILE_NOTIFY_CHANGE_ATTRIBUTES)
376 result = talloc_asprintf_append(result, "ATTRIBUTES|");
377 if (filter & FILE_NOTIFY_CHANGE_SIZE)
378 result = talloc_asprintf_append(result, "SIZE|");
379 if (filter & FILE_NOTIFY_CHANGE_LAST_WRITE)
380 result = talloc_asprintf_append(result, "LAST_WRITE|");
381 if (filter & FILE_NOTIFY_CHANGE_LAST_ACCESS)
382 result = talloc_asprintf_append(result, "LAST_ACCESS|");
383 if (filter & FILE_NOTIFY_CHANGE_CREATION)
384 result = talloc_asprintf_append(result, "CREATION|");
385 if (filter & FILE_NOTIFY_CHANGE_EA)
386 result = talloc_asprintf_append(result, "EA|");
387 if (filter & FILE_NOTIFY_CHANGE_SECURITY)
388 result = talloc_asprintf_append(result, "SECURITY|");
389 if (filter & FILE_NOTIFY_CHANGE_STREAM_NAME)
390 result = talloc_asprintf_append(result, "STREAM_NAME|");
391 if (filter & FILE_NOTIFY_CHANGE_STREAM_SIZE)
392 result = talloc_asprintf_append(result, "STREAM_SIZE|");
393 if (filter & FILE_NOTIFY_CHANGE_STREAM_WRITE)
394 result = talloc_asprintf_append(result, "STREAM_WRITE|");
396 if (result == NULL) return NULL;
397 if (*result == '\0') return result;
399 result[strlen(result)-1] = '\0';
403 struct sys_notify_context *sys_notify_context_create(connection_struct *conn,
405 struct event_context *ev)
407 struct sys_notify_context *ctx;
409 if (!(ctx = TALLOC_P(mem_ctx, struct sys_notify_context))) {
410 DEBUG(0, ("talloc failed\n"));
416 ctx->private_data = NULL;
420 NTSTATUS sys_notify_watch(struct sys_notify_context *ctx,
421 struct notify_entry *e,
422 void (*callback)(struct sys_notify_context *ctx,
424 struct notify_event *ev),
425 void *private_data, void *handle)
427 return SMB_VFS_NOTIFY_WATCH(ctx->conn, ctx, e, callback, private_data,