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s3/docs: Fix typo.
[Samba/gebeck_regimport.git] / source3 / smbd / smb2_write.c
blobccfe3b343424d39dca582df982a18042b5a085e2
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/globals.h"
23 #include "../source4/libcli/smb2/smb2_constants.h"
24
25 static struct tevent_req *smbd_smb2_write_send(TALLOC_CTX *mem_ctx,
26 struct tevent_context *ev,
27 struct smbd_smb2_request *smb2req,
28 uint32_t in_smbpid,
29 uint64_t in_file_id_volatile,
30 DATA_BLOB in_data,
31 uint64_t in_offset,
32 uint32_t in_flags);
33 static NTSTATUS smbd_smb2_write_recv(struct tevent_req *req,
34 uint32_t *out_count);
35
36 static void smbd_smb2_request_write_done(struct tevent_req *subreq);
37 NTSTATUS smbd_smb2_request_process_write(struct smbd_smb2_request *req)
38 {
39 const uint8_t *inhdr;
40 const uint8_t *inbody;
41 int i = req->current_idx;
42 size_t expected_body_size = 0x31;
43 size_t body_size;
44 uint32_t in_smbpid;
45 uint16_t in_data_offset;
46 uint32_t in_data_length;
47 DATA_BLOB in_data_buffer;
48 uint64_t in_offset;
49 uint64_t in_file_id_persistent;
50 uint64_t in_file_id_volatile;
51 uint32_t in_flags;
52 struct tevent_req *subreq;
53
54 inhdr = (const uint8_t *)req->in.vector[i+0].iov_base;
55 if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
56 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
57 }
58
59 inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
60
61 body_size = SVAL(inbody, 0x00);
62 if (body_size != expected_body_size) {
63 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
64 }
65
66 in_smbpid = IVAL(inhdr, SMB2_HDR_PID);
67
68 in_data_offset = SVAL(inbody, 0x02);
69 in_data_length = IVAL(inbody, 0x04);
70 in_offset = BVAL(inbody, 0x08);
71 in_file_id_persistent = BVAL(inbody, 0x10);
72 in_file_id_volatile = BVAL(inbody, 0x18);
73 in_flags = IVAL(inbody, 0x2C);
74
75 if (in_data_offset != (SMB2_HDR_BODY + (body_size & 0xFFFFFFFE))) {
76 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
77 }
78
79 if (in_data_length > req->in.vector[i+2].iov_len) {
80 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
81 }
82
83 /* check the max write size */
84 if (in_data_length > 0x00010000) {
85 DEBUG(0,("here:%s: 0x%08X: 0x%08X\n",
86 __location__, in_data_length, 0x00010000));
87 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
88 }
89
90 in_data_buffer.data = (uint8_t *)req->in.vector[i+2].iov_base;
91 in_data_buffer.length = in_data_length;
92
93 if (req->compat_chain_fsp) {
94 /* skip check */
95 } else if (in_file_id_persistent != 0) {
96 return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
97 }
98
99 subreq = smbd_smb2_write_send(req,
100 req->conn->smb2.event_ctx,
101 req,
102 in_smbpid,
103 in_file_id_volatile,
104 in_data_buffer,
105 in_offset,
106 in_flags);
107 if (subreq == NULL) {
108 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
109 }
110 tevent_req_set_callback(subreq, smbd_smb2_request_write_done, req);
111 return NT_STATUS_OK;
112 }
113
114 static void smbd_smb2_request_write_done(struct tevent_req *subreq)
115 {
116 struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
117 struct smbd_smb2_request);
118 int i = req->current_idx;
119 uint8_t *outhdr;
120 DATA_BLOB outbody;
121 DATA_BLOB outdyn;
122 uint32_t out_count;
123 NTSTATUS status;
124 NTSTATUS error; /* transport error */
125
126 status = smbd_smb2_write_recv(subreq, &out_count);
127 TALLOC_FREE(subreq);
128 if (!NT_STATUS_IS_OK(status)) {
129 error = smbd_smb2_request_error(req, status);
130 if (!NT_STATUS_IS_OK(error)) {
131 smbd_server_connection_terminate(req->conn,
132 nt_errstr(error));
133 return;
134 }
135 return;
136 }
137
138 outhdr = (uint8_t *)req->out.vector[i].iov_base;
139
140 outbody = data_blob_talloc(req->out.vector, NULL, 0x10);
141 if (outbody.data == NULL) {
142 error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
143 if (!NT_STATUS_IS_OK(error)) {
144 smbd_server_connection_terminate(req->conn,
145 nt_errstr(error));
146 return;
147 }
148 return;
149 }
150
151 SSVAL(outbody.data, 0x00, 0x10 + 1); /* struct size */
152 SSVAL(outbody.data, 0x02, 0); /* reserved */
153 SIVAL(outbody.data, 0x04, out_count); /* count */
154 SIVAL(outbody.data, 0x08, 0); /* remaining */
155 SSVAL(outbody.data, 0x0C, 0); /* write channel info offset */
156 SSVAL(outbody.data, 0x0E, 0); /* write channel info length */
157
158 outdyn = data_blob_const(NULL, 0);
159
160 error = smbd_smb2_request_done(req, outbody, &outdyn);
161 if (!NT_STATUS_IS_OK(error)) {
162 smbd_server_connection_terminate(req->conn, nt_errstr(error));
163 return;
164 }
165 }
166
167 struct smbd_smb2_write_state {
168 struct smbd_smb2_request *smb2req;
169 uint32_t in_length;
170 uint32_t out_count;
171 };
172
173 static void smbd_smb2_write_pipe_done(struct tevent_req *subreq);
174
175 static struct tevent_req *smbd_smb2_write_send(TALLOC_CTX *mem_ctx,
176 struct tevent_context *ev,
177 struct smbd_smb2_request *smb2req,
178 uint32_t in_smbpid,
179 uint64_t in_file_id_volatile,
180 DATA_BLOB in_data,
181 uint64_t in_offset,
182 uint32_t in_flags)
183 {
184 NTSTATUS status;
185 struct tevent_req *req;
186 struct smbd_smb2_write_state *state;
187 struct smb_request *smbreq;
188 connection_struct *conn = smb2req->tcon->compat_conn;
189 files_struct *fsp;
190 ssize_t nwritten;
191 bool write_through = false;
192 struct lock_struct lock;
193
194 req = tevent_req_create(mem_ctx, &state,
195 struct smbd_smb2_write_state);
196 if (req == NULL) {
197 return NULL;
198 }
199 state->smb2req = smb2req;
200 state->in_length = in_data.length;
201 state->out_count = 0;
202
203 DEBUG(10,("smbd_smb2_write: file_id[0x%016llX]\n",
204 (unsigned long long)in_file_id_volatile));
205
206 smbreq = smbd_smb2_fake_smb_request(smb2req);
207 if (tevent_req_nomem(smbreq, req)) {
208 return tevent_req_post(req, ev);
209 }
210
211 fsp = file_fsp(smbreq, (uint16_t)in_file_id_volatile);
212 if (fsp == NULL) {
213 tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
214 return tevent_req_post(req, ev);
215 }
216 if (conn != fsp->conn) {
217 tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
218 return tevent_req_post(req, ev);
219 }
220 if (smb2req->session->vuid != fsp->vuid) {
221 tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
222 return tevent_req_post(req, ev);
223 }
224
225 if (IS_IPC(smbreq->conn)) {
226 struct tevent_req *subreq;
227
228 if (!fsp_is_np(fsp)) {
229 tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
230 return tevent_req_post(req, ev);
231 }
232
233 subreq = np_write_send(state, smbd_event_context(),
234 fsp->fake_file_handle,
235 in_data.data,
236 in_data.length);
237 if (tevent_req_nomem(subreq, req)) {
238 return tevent_req_post(req, ev);
239 }
240 tevent_req_set_callback(subreq,
241 smbd_smb2_write_pipe_done,
242 req);
243 return req;
244 }
245
246 if (!CHECK_WRITE(fsp)) {
247 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
248 return tevent_req_post(req, ev);
249 }
250
251 init_strict_lock_struct(fsp,
252 in_smbpid,
253 in_offset,
254 in_data.length,
255 WRITE_LOCK,
256 &lock);
257
258 if (!SMB_VFS_STRICT_LOCK(conn, fsp, &lock)) {
259 tevent_req_nterror(req, NT_STATUS_FILE_LOCK_CONFLICT);
260 return tevent_req_post(req, ev);
261 }
262
263 nwritten = write_file(smbreq, fsp,
264 (const char *)in_data.data,
265 in_offset,
266 in_data.length);
267
268 if (((nwritten == 0) && (in_data.length != 0)) || (nwritten < 0)) {
269 DEBUG(5,("smbd_smb2_write: write_file[%s] disk full\n",
270 fsp->fsp_name));
271 SMB_VFS_STRICT_UNLOCK(conn, fsp, &lock);
272 tevent_req_nterror(req, NT_STATUS_DISK_FULL);
273 return tevent_req_post(req, ev);
274 }
275
276 DEBUG(3,("smbd_smb2_write: fnum=[%d/%s] length=%d offset=%d wrote=%d\n",
277 fsp->fnum, fsp->fsp_name, (int)in_data.length,
278 (int)in_offset, (int)nwritten));
279
280 if (in_flags & 0x00000001) {
281 write_through = true;
282 }
283
284 status = sync_file(conn, fsp, write_through);
285 if (!NT_STATUS_IS_OK(status)) {
286 DEBUG(5,("smbd_smb2_write: sync_file for %s returned %s\n",
287 fsp->fsp_name, nt_errstr(status)));
288 SMB_VFS_STRICT_UNLOCK(conn, fsp, &lock);
289 tevent_req_nterror(req, status);
290 return tevent_req_post(req, ev);
291 }
292
293 SMB_VFS_STRICT_UNLOCK(conn, fsp, &lock);
294
295 state->out_count = nwritten;
296
297 tevent_req_done(req);
298 return tevent_req_post(req, ev);
299 }
300
301 static void smbd_smb2_write_pipe_done(struct tevent_req *subreq)
302 {
303 struct tevent_req *req = tevent_req_callback_data(subreq,
304 struct tevent_req);
305 struct smbd_smb2_write_state *state = tevent_req_data(req,
306 struct smbd_smb2_write_state);
307 NTSTATUS status;
308 ssize_t nwritten = -1;
309
310 status = np_write_recv(subreq, &nwritten);
311 TALLOC_FREE(subreq);
312 if (!NT_STATUS_IS_OK(status)) {
313 tevent_req_nterror(req, status);
314 return;
315 }
316
317 if ((nwritten == 0 && state->in_length != 0) || (nwritten < 0)) {
318 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
319 return;
320 }
321
322 state->out_count = nwritten;
323
324 tevent_req_done(req);
325 }
326
327 static NTSTATUS smbd_smb2_write_recv(struct tevent_req *req,
328 uint32_t *out_count)
329 {
330 NTSTATUS status;
331 struct smbd_smb2_write_state *state = tevent_req_data(req,
332 struct smbd_smb2_write_state);
333
334 if (tevent_req_is_nterror(req, &status)) {
335 tevent_req_received(req);
336 return status;
337 }
338
339 *out_count = state->out_count;
340
341 tevent_req_received(req);
342 return NT_STATUS_OK;
343 }
reg import