2 Unix SMB/CIFS implementation.
5 Copyright (C) Stefan Metzmacher 2009
6 Copyright (C) Jeremy Allison 2010
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 3 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, see <http://www.gnu.org/licenses/>.
23 #include "smbd/smbd.h"
24 #include "smbd/globals.h"
25 #include "../libcli/smb/smb_common.h"
26 #include "../lib/util/tevent_ntstatus.h"
29 #define DBGC_CLASS DBGC_SMB2
31 struct smbd_smb2_notify_state {
32 struct smbd_smb2_request *smb2req;
33 struct smb_request *smbreq;
37 DATA_BLOB out_output_buffer;
40 static struct tevent_req *smbd_smb2_notify_send(TALLOC_CTX *mem_ctx,
41 struct tevent_context *ev,
42 struct smbd_smb2_request *smb2req,
43 struct files_struct *in_fsp,
45 uint32_t in_output_buffer_length,
46 uint64_t in_completion_filter);
47 static NTSTATUS smbd_smb2_notify_recv(struct tevent_req *req,
49 DATA_BLOB *out_output_buffer);
51 static void smbd_smb2_request_notify_done(struct tevent_req *subreq);
52 NTSTATUS smbd_smb2_request_process_notify(struct smbd_smb2_request *req)
54 struct smbXsrv_connection *xconn = req->xconn;
56 const uint8_t *inbody;
58 uint32_t in_output_buffer_length;
59 uint64_t in_file_id_persistent;
60 uint64_t in_file_id_volatile;
61 struct files_struct *in_fsp;
62 uint64_t in_completion_filter;
63 struct tevent_req *subreq;
65 status = smbd_smb2_request_verify_sizes(req, 0x20);
66 if (!NT_STATUS_IS_OK(status)) {
67 return smbd_smb2_request_error(req, status);
69 inbody = SMBD_SMB2_IN_BODY_PTR(req);
71 in_flags = SVAL(inbody, 0x02);
72 in_output_buffer_length = IVAL(inbody, 0x04);
73 in_file_id_persistent = BVAL(inbody, 0x08);
74 in_file_id_volatile = BVAL(inbody, 0x10);
75 in_completion_filter = IVAL(inbody, 0x18);
78 * 0x00010000 is what Windows 7 uses,
79 * Windows 2008 uses 0x00080000
81 if (in_output_buffer_length > xconn->smb2.server.max_trans) {
82 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
85 status = smbd_smb2_request_verify_creditcharge(req,
86 in_output_buffer_length);
88 if (!NT_STATUS_IS_OK(status)) {
89 return smbd_smb2_request_error(req, status);
92 in_fsp = file_fsp_smb2(req, in_file_id_persistent, in_file_id_volatile);
94 return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
97 subreq = smbd_smb2_notify_send(req, req->sconn->ev_ctx,
100 in_output_buffer_length,
101 in_completion_filter);
102 if (subreq == NULL) {
103 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
105 tevent_req_set_callback(subreq, smbd_smb2_request_notify_done, req);
107 return smbd_smb2_request_pending_queue(req, subreq, 500);
110 static void smbd_smb2_request_notify_done(struct tevent_req *subreq)
112 struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
113 struct smbd_smb2_request);
116 uint16_t out_output_buffer_offset;
117 DATA_BLOB out_output_buffer = data_blob_null;
119 NTSTATUS error; /* transport error */
121 status = smbd_smb2_notify_recv(subreq,
125 if (!NT_STATUS_IS_OK(status)) {
126 error = smbd_smb2_request_error(req, status);
127 if (!NT_STATUS_IS_OK(error)) {
128 smbd_server_connection_terminate(req->xconn,
135 out_output_buffer_offset = SMB2_HDR_BODY + 0x08;
137 outbody = smbd_smb2_generate_outbody(req, 0x08);
138 if (outbody.data == NULL) {
139 error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
140 if (!NT_STATUS_IS_OK(error)) {
141 smbd_server_connection_terminate(req->xconn,
148 SSVAL(outbody.data, 0x00, 0x08 + 1); /* struct size */
149 SSVAL(outbody.data, 0x02,
150 out_output_buffer_offset); /* output buffer offset */
151 SIVAL(outbody.data, 0x04,
152 out_output_buffer.length); /* output buffer length */
154 outdyn = out_output_buffer;
156 error = smbd_smb2_request_done(req, outbody, &outdyn);
157 if (!NT_STATUS_IS_OK(error)) {
158 smbd_server_connection_terminate(req->xconn,
164 static void smbd_smb2_notify_reply(struct smb_request *smbreq,
166 uint8_t *buf, size_t len);
167 static bool smbd_smb2_notify_cancel(struct tevent_req *req);
169 static int smbd_smb2_notify_state_destructor(struct smbd_smb2_notify_state *state)
171 if (!state->has_request) {
175 state->skip_reply = true;
176 smbd_notify_cancel_by_smbreq(state->smbreq);
180 static int smbd_smb2_notify_smbreq_destructor(struct smb_request *smbreq)
182 struct tevent_req *req = talloc_get_type_abort(smbreq->async_priv,
184 struct smbd_smb2_notify_state *state = tevent_req_data(req,
185 struct smbd_smb2_notify_state);
188 * Our temporary parent from change_notify_add_request()
191 state->has_request = false;
194 * move it back to its original parent,
195 * which means we no longer need the destructor
198 talloc_steal(smbreq->smb2req, smbreq);
199 talloc_set_destructor(smbreq, NULL);
202 * We want to keep smbreq!
207 static struct tevent_req *smbd_smb2_notify_send(TALLOC_CTX *mem_ctx,
208 struct tevent_context *ev,
209 struct smbd_smb2_request *smb2req,
210 struct files_struct *fsp,
212 uint32_t in_output_buffer_length,
213 uint64_t in_completion_filter)
215 struct tevent_req *req;
216 struct smbd_smb2_notify_state *state;
217 struct smb_request *smbreq;
218 connection_struct *conn = smb2req->tcon->compat;
219 bool recursive = (in_flags & SMB2_WATCH_TREE) ? true : false;
222 req = tevent_req_create(mem_ctx, &state,
223 struct smbd_smb2_notify_state);
227 state->smb2req = smb2req;
228 state->status = NT_STATUS_INTERNAL_ERROR;
229 state->out_output_buffer = data_blob_null;
230 talloc_set_destructor(state, smbd_smb2_notify_state_destructor);
232 DEBUG(10,("smbd_smb2_notify_send: %s - %s\n",
233 fsp_str_dbg(fsp), fsp_fnum_dbg(fsp)));
235 smbreq = smbd_smb2_fake_smb_request(smb2req, fsp);
236 if (tevent_req_nomem(smbreq, req)) {
237 return tevent_req_post(req, ev);
240 state->smbreq = smbreq;
241 smbreq->async_priv = (void *)req;
243 DBG_NOTICE("notify change called on %s, filter = %s, recursive = %d\n",
245 notify_filter_string(talloc_tos(), in_completion_filter),
248 if ((!fsp->fsp_flags.is_directory) || (conn != fsp->conn)) {
249 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
250 return tevent_req_post(req, ev);
253 if (fsp->notify == NULL) {
255 status = change_notify_create(fsp,
256 in_output_buffer_length,
257 in_completion_filter,
259 if (tevent_req_nterror(req, status)) {
260 DEBUG(10, ("change_notify_create returned %s\n",
262 return tevent_req_post(req, ev);
266 if (change_notify_fsp_has_changes(fsp)) {
269 * We've got changes pending, respond immediately
273 * TODO: write a torture test to check the filtering behaviour
277 change_notify_reply(smbreq,
279 in_output_buffer_length,
281 smbd_smb2_notify_reply);
284 * change_notify_reply() above has independently
285 * called tevent_req_done().
287 return tevent_req_post(req, ev);
291 * No changes pending, queue the request
294 status = change_notify_add_request(smbreq,
295 in_output_buffer_length,
296 in_completion_filter,
298 smbd_smb2_notify_reply);
299 if (tevent_req_nterror(req, status)) {
300 return tevent_req_post(req, ev);
306 * change_notify_add_request() talloc_moves()
307 * smbreq away from us, so we need a destructor
308 * which moves it back at the end.
310 state->has_request = true;
311 talloc_set_destructor(smbreq, smbd_smb2_notify_smbreq_destructor);
313 /* allow this request to be canceled */
314 tevent_req_set_cancel_fn(req, smbd_smb2_notify_cancel);
316 SMBPROFILE_IOBYTES_ASYNC_SET_IDLE(state->smb2req->profile);
320 static void smbd_smb2_notify_reply(struct smb_request *smbreq,
322 uint8_t *buf, size_t len)
324 struct tevent_req *req = talloc_get_type_abort(smbreq->async_priv,
326 struct smbd_smb2_notify_state *state = tevent_req_data(req,
327 struct smbd_smb2_notify_state);
329 if (state->skip_reply) {
333 SMBPROFILE_IOBYTES_ASYNC_SET_BUSY(state->smb2req->profile);
335 state->status = error_code;
336 if (!NT_STATUS_IS_OK(error_code)) {
338 } else if (len == 0) {
339 state->status = NT_STATUS_NOTIFY_ENUM_DIR;
341 state->out_output_buffer = data_blob_talloc(state, buf, len);
342 if (state->out_output_buffer.data == NULL) {
343 state->status = NT_STATUS_NO_MEMORY;
347 tevent_req_defer_callback(req, state->smb2req->sconn->ev_ctx);
349 if (tevent_req_nterror(req, state->status)) {
353 tevent_req_done(req);
356 static bool smbd_smb2_notify_cancel(struct tevent_req *req)
358 struct smbd_smb2_notify_state *state = tevent_req_data(req,
359 struct smbd_smb2_notify_state);
361 smbd_notify_cancel_by_smbreq(state->smbreq);
366 static NTSTATUS smbd_smb2_notify_recv(struct tevent_req *req,
368 DATA_BLOB *out_output_buffer)
371 struct smbd_smb2_notify_state *state = tevent_req_data(req,
372 struct smbd_smb2_notify_state);
374 if (tevent_req_is_nterror(req, &status)) {
375 tevent_req_received(req);
379 *out_output_buffer = state->out_output_buffer;
380 talloc_steal(mem_ctx, out_output_buffer->data);
382 tevent_req_received(req);