2 Unix SMB/CIFS implementation.
5 Copyright (C) Stefan Metzmacher 2009
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.
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.
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/>.
22 #include "smbd/globals.h"
23 #include "../libcli/smb/smb_common.h"
25 static struct tevent_req
*smbd_smb2_read_send(TALLOC_CTX
*mem_ctx
,
26 struct tevent_context
*ev
,
27 struct smbd_smb2_request
*smb2req
,
29 uint64_t in_file_id_volatile
,
33 uint32_t in_remaining
);
34 static NTSTATUS
smbd_smb2_read_recv(struct tevent_req
*req
,
37 uint32_t *out_remaining
);
39 static void smbd_smb2_request_read_done(struct tevent_req
*subreq
);
40 NTSTATUS
smbd_smb2_request_process_read(struct smbd_smb2_request
*req
)
43 const uint8_t *inbody
;
44 int i
= req
->current_idx
;
45 size_t expected_body_size
= 0x31;
50 uint64_t in_file_id_persistent
;
51 uint64_t in_file_id_volatile
;
52 uint32_t in_minimum_count
;
53 uint32_t in_remaining_bytes
;
54 struct tevent_req
*subreq
;
56 inhdr
= (const uint8_t *)req
->in
.vector
[i
+0].iov_base
;
57 if (req
->in
.vector
[i
+1].iov_len
!= (expected_body_size
& 0xFFFFFFFE)) {
58 return smbd_smb2_request_error(req
, NT_STATUS_INVALID_PARAMETER
);
61 inbody
= (const uint8_t *)req
->in
.vector
[i
+1].iov_base
;
63 body_size
= SVAL(inbody
, 0x00);
64 if (body_size
!= expected_body_size
) {
65 return smbd_smb2_request_error(req
, NT_STATUS_INVALID_PARAMETER
);
68 in_smbpid
= IVAL(inhdr
, SMB2_HDR_PID
);
70 in_length
= IVAL(inbody
, 0x04);
71 in_offset
= BVAL(inbody
, 0x08);
72 in_file_id_persistent
= BVAL(inbody
, 0x10);
73 in_file_id_volatile
= BVAL(inbody
, 0x18);
74 in_minimum_count
= IVAL(inbody
, 0x20);
75 in_remaining_bytes
= IVAL(inbody
, 0x28);
77 /* check the max read size */
78 if (in_length
> lp_smb2_max_read()) {
79 DEBUG(0,("here:%s: 0x%08X: 0x%08X\n",
80 __location__
, in_length
, lp_smb2_max_read()));
81 return smbd_smb2_request_error(req
, NT_STATUS_INVALID_PARAMETER
);
84 if (req
->compat_chain_fsp
) {
86 } else if (in_file_id_persistent
!= in_file_id_volatile
) {
87 return smbd_smb2_request_error(req
, NT_STATUS_FILE_CLOSED
);
90 subreq
= smbd_smb2_read_send(req
,
91 req
->sconn
->smb2
.event_ctx
,
100 return smbd_smb2_request_error(req
, NT_STATUS_NO_MEMORY
);
102 tevent_req_set_callback(subreq
, smbd_smb2_request_read_done
, req
);
104 return smbd_smb2_request_pending_queue(req
, subreq
);
107 static void smbd_smb2_request_read_done(struct tevent_req
*subreq
)
109 struct smbd_smb2_request
*req
= tevent_req_callback_data(subreq
,
110 struct smbd_smb2_request
);
111 int i
= req
->current_idx
;
115 uint8_t out_data_offset
;
116 DATA_BLOB out_data_buffer
= data_blob_null
;
117 uint32_t out_data_remaining
= 0;
119 NTSTATUS error
; /* transport error */
121 status
= smbd_smb2_read_recv(subreq
,
124 &out_data_remaining
);
126 if (!NT_STATUS_IS_OK(status
)) {
127 error
= smbd_smb2_request_error(req
, status
);
128 if (!NT_STATUS_IS_OK(error
)) {
129 smbd_server_connection_terminate(req
->sconn
,
136 out_data_offset
= SMB2_HDR_BODY
+ 0x10;
138 outhdr
= (uint8_t *)req
->out
.vector
[i
].iov_base
;
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
->sconn
,
151 SSVAL(outbody
.data
, 0x00, 0x10 + 1); /* struct size */
152 SCVAL(outbody
.data
, 0x02,
153 out_data_offset
); /* data offset */
154 SCVAL(outbody
.data
, 0x03, 0); /* reserved */
155 SIVAL(outbody
.data
, 0x04,
156 out_data_buffer
.length
); /* data length */
157 SIVAL(outbody
.data
, 0x08,
158 out_data_remaining
); /* data remaining */
159 SIVAL(outbody
.data
, 0x0C, 0); /* reserved */
161 outdyn
= out_data_buffer
;
163 error
= smbd_smb2_request_done(req
, outbody
, &outdyn
);
164 if (!NT_STATUS_IS_OK(error
)) {
165 smbd_server_connection_terminate(req
->sconn
,
171 struct smbd_smb2_read_state
{
172 struct smbd_smb2_request
*smb2req
;
178 uint32_t out_remaining
;
181 static void smbd_smb2_read_pipe_done(struct tevent_req
*subreq
);
183 /*******************************************************************
184 Common read complete processing function for both synchronous and
186 *******************************************************************/
188 NTSTATUS
smb2_read_complete(struct tevent_req
*req
, ssize_t nread
, int err
)
190 struct smbd_smb2_read_state
*state
= tevent_req_data(req
,
191 struct smbd_smb2_read_state
);
192 files_struct
*fsp
= state
->fsp
;
195 NTSTATUS status
= map_nt_error_from_unix(err
);
197 DEBUG( 3,( "smb2_read_complete: file %s nread = %d. "
198 "Error = %s (NTSTATUS %s)\n",
206 if (nread
== 0 && state
->in_length
!= 0) {
207 DEBUG(5,("smb2_read_complete: read_file[%s] end of file\n",
209 return NT_STATUS_END_OF_FILE
;
212 if (nread
< state
->in_minimum
) {
213 DEBUG(5,("smb2_read_complete: read_file[%s] read less %d than "
214 "minimum requested %u. Returning end of file\n",
217 (unsigned int)state
->in_minimum
));
218 return NT_STATUS_END_OF_FILE
;
221 DEBUG(3,("smbd_smb2_read: fnum=[%d/%s] length=%lu offset=%lu read=%lu\n",
224 (unsigned long)state
->in_length
,
225 (unsigned long)state
->in_offset
,
226 (unsigned long)nread
));
228 state
->out_data
.length
= nread
;
229 state
->out_remaining
= 0;
234 static struct tevent_req
*smbd_smb2_read_send(TALLOC_CTX
*mem_ctx
,
235 struct tevent_context
*ev
,
236 struct smbd_smb2_request
*smb2req
,
238 uint64_t in_file_id_volatile
,
242 uint32_t in_remaining
)
245 struct tevent_req
*req
= NULL
;
246 struct smbd_smb2_read_state
*state
= NULL
;
247 struct smb_request
*smbreq
= NULL
;
248 connection_struct
*conn
= smb2req
->tcon
->compat_conn
;
249 files_struct
*fsp
= NULL
;
251 struct lock_struct lock
;
254 req
= tevent_req_create(mem_ctx
, &state
,
255 struct smbd_smb2_read_state
);
259 state
->smb2req
= smb2req
;
260 state
->in_length
= in_length
;
261 state
->in_offset
= in_offset
;
262 state
->in_minimum
= in_minimum
;
263 state
->out_data
= data_blob_null
;
264 state
->out_remaining
= 0;
266 DEBUG(10,("smbd_smb2_read: file_id[0x%016llX]\n",
267 (unsigned long long)in_file_id_volatile
));
269 smbreq
= smbd_smb2_fake_smb_request(smb2req
);
270 if (tevent_req_nomem(smbreq
, req
)) {
271 return tevent_req_post(req
, ev
);
274 fsp
= file_fsp(smbreq
, (uint16_t)in_file_id_volatile
);
276 tevent_req_nterror(req
, NT_STATUS_FILE_CLOSED
);
277 return tevent_req_post(req
, ev
);
279 if (conn
!= fsp
->conn
) {
280 tevent_req_nterror(req
, NT_STATUS_FILE_CLOSED
);
281 return tevent_req_post(req
, ev
);
283 if (smb2req
->session
->vuid
!= fsp
->vuid
) {
284 tevent_req_nterror(req
, NT_STATUS_FILE_CLOSED
);
285 return tevent_req_post(req
, ev
);
287 if (fsp
->is_directory
) {
288 tevent_req_nterror(req
, NT_STATUS_INVALID_DEVICE_REQUEST
);
289 return tevent_req_post(req
, ev
);
292 state
->out_data
= data_blob_talloc(state
, NULL
, in_length
);
293 if (in_length
> 0 && tevent_req_nomem(state
->out_data
.data
, req
)) {
294 return tevent_req_post(req
, ev
);
299 if (IS_IPC(smbreq
->conn
)) {
300 struct tevent_req
*subreq
= NULL
;
302 if (!fsp_is_np(fsp
)) {
303 tevent_req_nterror(req
, NT_STATUS_FILE_CLOSED
);
304 return tevent_req_post(req
, ev
);
307 subreq
= np_read_send(state
, smbd_event_context(),
308 fsp
->fake_file_handle
,
309 state
->out_data
.data
,
310 state
->out_data
.length
);
311 if (tevent_req_nomem(subreq
, req
)) {
312 return tevent_req_post(req
, ev
);
314 tevent_req_set_callback(subreq
,
315 smbd_smb2_read_pipe_done
,
320 if (!CHECK_READ(fsp
, smbreq
)) {
321 tevent_req_nterror(req
, NT_STATUS_ACCESS_DENIED
);
322 return tevent_req_post(req
, ev
);
325 status
= schedule_smb2_aio_read(fsp
->conn
,
328 (char *)state
->out_data
.data
,
329 (SMB_OFF_T
)in_offset
,
332 if (NT_STATUS_IS_OK(status
)) {
334 * Doing an async read. Don't
335 * send a "gone async" message
336 * as we expect this to be less
337 * than the client timeout period.
338 * JRA. FIXME for offline files..
339 * FIXME. Add cancel code..
341 smb2req
->async
= true;
345 if (!NT_STATUS_EQUAL(status
, NT_STATUS_RETRY
)) {
346 /* Real error in setting up aio. Fail. */
347 tevent_req_nterror(req
, NT_STATUS_FILE_CLOSED
);
348 return tevent_req_post(req
, ev
);
351 /* Fallback to synchronous. */
353 init_strict_lock_struct(fsp
,
360 if (!SMB_VFS_STRICT_LOCK(conn
, fsp
, &lock
)) {
361 tevent_req_nterror(req
, NT_STATUS_FILE_LOCK_CONFLICT
);
362 return tevent_req_post(req
, ev
);
365 nread
= read_file(fsp
,
366 (char *)state
->out_data
.data
,
372 SMB_VFS_STRICT_UNLOCK(conn
, fsp
, &lock
);
374 DEBUG(10,("smbd_smb2_read: file %s handle [0x%016llX] offset=%llu "
375 "len=%llu returned %lld\n",
377 (unsigned long long)in_file_id_volatile
,
378 (unsigned long long)in_offset
,
379 (unsigned long long)in_length
,
382 status
= smb2_read_complete(req
, nread
, saved_errno
);
383 if (!NT_STATUS_IS_OK(status
)) {
384 tevent_req_nterror(req
, status
);
387 tevent_req_done(req
);
389 return tevent_req_post(req
, ev
);
392 static void smbd_smb2_read_pipe_done(struct tevent_req
*subreq
)
394 struct tevent_req
*req
= tevent_req_callback_data(subreq
,
396 struct smbd_smb2_read_state
*state
= tevent_req_data(req
,
397 struct smbd_smb2_read_state
);
400 bool is_data_outstanding
;
402 status
= np_read_recv(subreq
, &nread
, &is_data_outstanding
);
404 if (!NT_STATUS_IS_OK(status
)) {
405 tevent_req_nterror(req
, status
);
409 if (nread
== 0 && state
->out_data
.length
!= 0) {
410 tevent_req_nterror(req
, NT_STATUS_END_OF_FILE
);
414 state
->out_data
.length
= nread
;
415 state
->out_remaining
= 0;
417 tevent_req_done(req
);
420 static NTSTATUS
smbd_smb2_read_recv(struct tevent_req
*req
,
423 uint32_t *out_remaining
)
426 struct smbd_smb2_read_state
*state
= tevent_req_data(req
,
427 struct smbd_smb2_read_state
);
429 if (tevent_req_is_nterror(req
, &status
)) {
430 tevent_req_received(req
);
434 *out_data
= state
->out_data
;
435 talloc_steal(mem_ctx
, out_data
->data
);
436 *out_remaining
= state
->out_remaining
;
438 tevent_req_received(req
);