source: vendor/current/source3/smbd/smb2_close.c

Last change on this file was 988, checked in by Silvan Scherrer, 9 years ago

Samba Server: update vendor to version 4.4.3
File size: 11.7 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3 Core SMB2 server
4
5 Copyright (C) Stefan Metzmacher 2009
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
19*/
20
21#include "includes.h"
22#include "smbd/smbd.h"
23#include "smbd/globals.h"
24#include "../libcli/smb/smb_common.h"
25#include "../lib/util/tevent_ntstatus.h"
26#include "lib/tevent_wait.h"
27
28static struct tevent_req *smbd_smb2_close_send(TALLOC_CTX *mem_ctx,
29 struct tevent_context *ev,
30 struct smbd_smb2_request *smb2req,
31 struct files_struct *in_fsp,
32 uint16_t in_flags);
33static NTSTATUS smbd_smb2_close_recv(struct tevent_req *req,
34 uint16_t *out_flags,
35 struct timespec *out_creation_ts,
36 struct timespec *out_last_access_ts,
37 struct timespec *out_last_write_ts,
38 struct timespec *out_change_ts,
39 uint64_t *out_allocation_size,
40 uint64_t *out_end_of_file,
41 uint32_t *out_file_attributes);
42
43static void smbd_smb2_request_close_done(struct tevent_req *subreq);
44
45NTSTATUS smbd_smb2_request_process_close(struct smbd_smb2_request *req)
46{
47 const uint8_t *inbody;
48 uint16_t in_flags;
49 uint64_t in_file_id_persistent;
50 uint64_t in_file_id_volatile;
51 struct files_struct *in_fsp;
52 NTSTATUS status;
53 struct tevent_req *subreq;
54
55 status = smbd_smb2_request_verify_sizes(req, 0x18);
56 if (!NT_STATUS_IS_OK(status)) {
57 return smbd_smb2_request_error(req, status);
58 }
59 inbody = SMBD_SMB2_IN_BODY_PTR(req);
60
61 in_flags = SVAL(inbody, 0x02);
62 in_file_id_persistent = BVAL(inbody, 0x08);
63 in_file_id_volatile = BVAL(inbody, 0x10);
64
65 in_fsp = file_fsp_smb2(req, in_file_id_persistent, in_file_id_volatile);
66 if (in_fsp == NULL) {
67 return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
68 }
69
70 subreq = smbd_smb2_close_send(req, req->sconn->ev_ctx,
71 req, in_fsp, in_flags);
72 if (subreq == NULL) {
73 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
74 }
75 tevent_req_set_callback(subreq, smbd_smb2_request_close_done, req);
76
77 return smbd_smb2_request_pending_queue(req, subreq, 500);
78}
79
80static void smbd_smb2_request_close_done(struct tevent_req *subreq)
81{
82 struct smbd_smb2_request *req =
83 tevent_req_callback_data(subreq,
84 struct smbd_smb2_request);
85 DATA_BLOB outbody;
86 uint16_t out_flags = 0;
87 connection_struct *conn = req->tcon->compat;
88 struct timespec out_creation_ts = { 0, };
89 struct timespec out_last_access_ts = { 0, };
90 struct timespec out_last_write_ts = { 0, };
91 struct timespec out_change_ts = { 0, };
92 uint64_t out_allocation_size = 0;
93 uint64_t out_end_of_file = 0;
94 uint32_t out_file_attributes = 0;
95 NTSTATUS status;
96 NTSTATUS error;
97
98 status = smbd_smb2_close_recv(subreq,
99 &out_flags,
100 &out_creation_ts,
101 &out_last_access_ts,
102 &out_last_write_ts,
103 &out_change_ts,
104 &out_allocation_size,
105 &out_end_of_file,
106 &out_file_attributes);
107 TALLOC_FREE(subreq);
108 if (!NT_STATUS_IS_OK(status)) {
109 error = smbd_smb2_request_error(req, status);
110 if (!NT_STATUS_IS_OK(error)) {
111 smbd_server_connection_terminate(req->xconn,
112 nt_errstr(error));
113 return;
114 }
115 return;
116 }
117
118 outbody = smbd_smb2_generate_outbody(req, 0x3C);
119 if (outbody.data == NULL) {
120 error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
121 if (!NT_STATUS_IS_OK(error)) {
122 smbd_server_connection_terminate(req->xconn,
123 nt_errstr(error));
124 return;
125 }
126 return;
127 }
128
129 SSVAL(outbody.data, 0x00, 0x3C); /* struct size */
130 SSVAL(outbody.data, 0x02, out_flags);
131 SIVAL(outbody.data, 0x04, 0); /* reserved */
132 put_long_date_timespec(conn->ts_res,
133 (char *)outbody.data + 0x08, out_creation_ts);
134 put_long_date_timespec(conn->ts_res,
135 (char *)outbody.data + 0x10, out_last_access_ts);
136 put_long_date_timespec(conn->ts_res,
137 (char *)outbody.data + 0x18, out_last_write_ts);
138 put_long_date_timespec(conn->ts_res,
139 (char *)outbody.data + 0x20, out_change_ts);
140 SBVAL(outbody.data, 0x28, out_allocation_size);
141 SBVAL(outbody.data, 0x30, out_end_of_file);
142 SIVAL(outbody.data, 0x38, out_file_attributes);
143
144 error = smbd_smb2_request_done(req, outbody, NULL);
145 if (!NT_STATUS_IS_OK(error)) {
146 smbd_server_connection_terminate(req->xconn,
147 nt_errstr(error));
148 return;
149 }
150}
151
152static void setup_close_full_information(connection_struct *conn,
153 struct smb_filename *smb_fname,
154 bool posix_open,
155 struct timespec *out_creation_ts,
156 struct timespec *out_last_access_ts,
157 struct timespec *out_last_write_ts,
158 struct timespec *out_change_ts,
159 uint16_t *out_flags,
160 uint64_t *out_allocation_size,
161 uint64_t *out_end_of_file,
162 uint32_t *out_file_attributes)
163{
164 int ret;
165 if (posix_open) {
166 ret = SMB_VFS_LSTAT(conn, smb_fname);
167 } else {
168 ret = SMB_VFS_STAT(conn, smb_fname);
169 }
170 if (ret != 0) {
171 return;
172 }
173
174 *out_flags = SMB2_CLOSE_FLAGS_FULL_INFORMATION;
175 *out_file_attributes = dos_mode(conn, smb_fname);
176 *out_last_write_ts = smb_fname->st.st_ex_mtime;
177 *out_last_access_ts = smb_fname->st.st_ex_atime;
178 *out_creation_ts = get_create_timespec(conn, NULL, smb_fname);
179 *out_change_ts = get_change_timespec(conn, NULL, smb_fname);
180
181 if (lp_dos_filetime_resolution(SNUM(conn))) {
182 dos_filetime_timespec(out_creation_ts);
183 dos_filetime_timespec(out_last_write_ts);
184 dos_filetime_timespec(out_last_access_ts);
185 dos_filetime_timespec(out_change_ts);
186 }
187 if (!(*out_file_attributes & FILE_ATTRIBUTE_DIRECTORY)) {
188 *out_end_of_file = get_file_size_stat(&smb_fname->st);
189 }
190
191 *out_allocation_size = SMB_VFS_GET_ALLOC_SIZE(conn, NULL, &smb_fname->st);
192}
193
194static NTSTATUS smbd_smb2_close(struct smbd_smb2_request *req,
195 struct files_struct *fsp,
196 uint16_t in_flags,
197 uint16_t *out_flags,
198 struct timespec *out_creation_ts,
199 struct timespec *out_last_access_ts,
200 struct timespec *out_last_write_ts,
201 struct timespec *out_change_ts,
202 uint64_t *out_allocation_size,
203 uint64_t *out_end_of_file,
204 uint32_t *out_file_attributes)
205{
206 NTSTATUS status;
207 struct smb_request *smbreq;
208 connection_struct *conn = req->tcon->compat;
209 struct smb_filename *smb_fname = NULL;
210 uint64_t allocation_size = 0;
211 uint64_t file_size = 0;
212 uint32_t dos_attrs = 0;
213 uint16_t flags = 0;
214 bool posix_open = false;
215
216 ZERO_STRUCTP(out_creation_ts);
217 ZERO_STRUCTP(out_last_access_ts);
218 ZERO_STRUCTP(out_last_write_ts);
219 ZERO_STRUCTP(out_change_ts);
220
221 *out_flags = 0;
222 *out_allocation_size = 0;
223 *out_end_of_file = 0;
224 *out_file_attributes = 0;
225
226 DEBUG(10,("smbd_smb2_close: %s - %s\n",
227 fsp_str_dbg(fsp), fsp_fnum_dbg(fsp)));
228
229 smbreq = smbd_smb2_fake_smb_request(req);
230 if (smbreq == NULL) {
231 return NT_STATUS_NO_MEMORY;
232 }
233
234 posix_open = (fsp->posix_flags & FSP_POSIX_FLAGS_OPEN);
235 smb_fname = cp_smb_filename(talloc_tos(), fsp->fsp_name);
236 if (smb_fname == NULL) {
237 return NT_STATUS_NO_MEMORY;
238 }
239
240 if ((in_flags & SMB2_CLOSE_FLAGS_FULL_INFORMATION) &&
241 (fsp->initial_delete_on_close || fsp->delete_on_close)) {
242 /*
243 * We might be deleting the file. Ensure we
244 * return valid data from before the file got
245 * removed.
246 */
247 setup_close_full_information(conn,
248 smb_fname,
249 posix_open,
250 out_creation_ts,
251 out_last_access_ts,
252 out_last_write_ts,
253 out_change_ts,
254 &flags,
255 &allocation_size,
256 &file_size,
257 &dos_attrs);
258 }
259
260 status = close_file(smbreq, fsp, NORMAL_CLOSE);
261 if (!NT_STATUS_IS_OK(status)) {
262 DEBUG(5,("smbd_smb2_close: close_file[%s]: %s\n",
263 fsp_str_dbg(fsp), nt_errstr(status)));
264 return status;
265 }
266
267 if (in_flags & SMB2_CLOSE_FLAGS_FULL_INFORMATION) {
268 setup_close_full_information(conn,
269 smb_fname,
270 posix_open,
271 out_creation_ts,
272 out_last_access_ts,
273 out_last_write_ts,
274 out_change_ts,
275 &flags,
276 &allocation_size,
277 &file_size,
278 &dos_attrs);
279 }
280
281 *out_flags = flags;
282 *out_allocation_size = allocation_size;
283 *out_end_of_file = file_size;
284 *out_file_attributes = dos_attrs;
285
286 return NT_STATUS_OK;
287}
288
289struct smbd_smb2_close_state {
290 struct smbd_smb2_request *smb2req;
291 struct files_struct *in_fsp;
292 uint16_t in_flags;
293 uint16_t out_flags;
294 struct timespec out_creation_ts;
295 struct timespec out_last_access_ts;
296 struct timespec out_last_write_ts;
297 struct timespec out_change_ts;
298 uint64_t out_allocation_size;
299 uint64_t out_end_of_file;
300 uint32_t out_file_attributes;
301};
302
303static void smbd_smb2_close_do(struct tevent_req *subreq);
304
305static struct tevent_req *smbd_smb2_close_send(TALLOC_CTX *mem_ctx,
306 struct tevent_context *ev,
307 struct smbd_smb2_request *smb2req,
308 struct files_struct *in_fsp,
309 uint16_t in_flags)
310{
311 struct tevent_req *req;
312 struct smbd_smb2_close_state *state;
313 NTSTATUS status;
314
315 req = tevent_req_create(mem_ctx, &state,
316 struct smbd_smb2_close_state);
317 if (req == NULL) {
318 return NULL;
319 }
320 state->smb2req = smb2req;
321 state->in_fsp = in_fsp;
322 state->in_flags = in_flags;
323
324 if (in_fsp->num_aio_requests != 0) {
325 in_fsp->deferred_close = tevent_wait_send(in_fsp, ev);
326 if (tevent_req_nomem(in_fsp->deferred_close, req)) {
327 return tevent_req_post(req, ev);
328 }
329 tevent_req_set_callback(in_fsp->deferred_close,
330 smbd_smb2_close_do, req);
331 return req;
332 }
333
334 status = smbd_smb2_close(smb2req,
335 state->in_fsp,
336 state->in_flags,
337 &state->out_flags,
338 &state->out_creation_ts,
339 &state->out_last_access_ts,
340 &state->out_last_write_ts,
341 &state->out_change_ts,
342 &state->out_allocation_size,
343 &state->out_end_of_file,
344 &state->out_file_attributes);
345 if (tevent_req_nterror(req, status)) {
346 return tevent_req_post(req, ev);
347 }
348
349 tevent_req_done(req);
350 return tevent_req_post(req, ev);
351}
352
353static void smbd_smb2_close_do(struct tevent_req *subreq)
354{
355 struct tevent_req *req = tevent_req_callback_data(
356 subreq, struct tevent_req);
357 struct smbd_smb2_close_state *state = tevent_req_data(
358 req, struct smbd_smb2_close_state);
359 NTSTATUS status;
360 int ret;
361
362 ret = tevent_wait_recv(subreq);
363 TALLOC_FREE(subreq);
364 if (ret != 0) {
365 DEBUG(10, ("tevent_wait_recv returned %s\n",
366 strerror(ret)));
367 /*
368 * Continue anyway, this should never happen
369 */
370 }
371
372 status = smbd_smb2_close(state->smb2req,
373 state->in_fsp,
374 state->in_flags,
375 &state->out_flags,
376 &state->out_creation_ts,
377 &state->out_last_access_ts,
378 &state->out_last_write_ts,
379 &state->out_change_ts,
380 &state->out_allocation_size,
381 &state->out_end_of_file,
382 &state->out_file_attributes);
383 if (tevent_req_nterror(req, status)) {
384 return;
385 }
386 tevent_req_done(req);
387}
388
389static NTSTATUS smbd_smb2_close_recv(struct tevent_req *req,
390 uint16_t *out_flags,
391 struct timespec *out_creation_ts,
392 struct timespec *out_last_access_ts,
393 struct timespec *out_last_write_ts,
394 struct timespec *out_change_ts,
395 uint64_t *out_allocation_size,
396 uint64_t *out_end_of_file,
397 uint32_t *out_file_attributes)
398{
399 struct smbd_smb2_close_state *state =
400 tevent_req_data(req,
401 struct smbd_smb2_close_state);
402 NTSTATUS status;
403
404 if (tevent_req_is_nterror(req, &status)) {
405 tevent_req_received(req);
406 return status;
407 }
408
409 *out_flags = state->out_flags;
410 *out_creation_ts = state->out_creation_ts;
411 *out_last_access_ts = state->out_last_access_ts;
412 *out_last_write_ts = state->out_last_write_ts;
413 *out_change_ts = state->out_change_ts;
414 *out_allocation_size = state->out_allocation_size;
415 *out_end_of_file = state->out_end_of_file;
416 *out_file_attributes = state->out_file_attributes;
417
418 tevent_req_received(req);
419 return NT_STATUS_OK;
420}
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