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/smbd.h"
23 #include "smbd/globals.h"
24 #include "../libcli/smb/smb_common.h"
25 #include "../lib/util/tevent_ntstatus.h"
26 #include "rpc_server/srv_pipe_hnd.h"
28 static struct tevent_req
*smbd_smb2_write_send(TALLOC_CTX
*mem_ctx
,
29 struct tevent_context
*ev
,
30 struct smbd_smb2_request
*smb2req
,
31 struct files_struct
*in_fsp
,
35 static NTSTATUS
smbd_smb2_write_recv(struct tevent_req
*req
,
38 static void smbd_smb2_request_write_done(struct tevent_req
*subreq
);
39 NTSTATUS
smbd_smb2_request_process_write(struct smbd_smb2_request
*req
)
42 const uint8_t *inbody
;
43 uint16_t in_data_offset
;
44 uint32_t in_data_length
;
45 DATA_BLOB in_data_buffer
;
47 uint64_t in_file_id_persistent
;
48 uint64_t in_file_id_volatile
;
49 struct files_struct
*in_fsp
;
51 struct tevent_req
*subreq
;
53 status
= smbd_smb2_request_verify_sizes(req
, 0x31);
54 if (!NT_STATUS_IS_OK(status
)) {
55 return smbd_smb2_request_error(req
, status
);
57 inbody
= SMBD_SMB2_IN_BODY_PTR(req
);
59 in_data_offset
= SVAL(inbody
, 0x02);
60 in_data_length
= IVAL(inbody
, 0x04);
61 in_offset
= BVAL(inbody
, 0x08);
62 in_file_id_persistent
= BVAL(inbody
, 0x10);
63 in_file_id_volatile
= BVAL(inbody
, 0x18);
64 in_flags
= IVAL(inbody
, 0x2C);
66 if (in_data_offset
!= (SMB2_HDR_BODY
+ SMBD_SMB2_IN_BODY_LEN(req
))) {
67 return smbd_smb2_request_error(req
, NT_STATUS_INVALID_PARAMETER
);
70 if (in_data_length
> SMBD_SMB2_IN_DYN_LEN(req
)) {
71 return smbd_smb2_request_error(req
, NT_STATUS_INVALID_PARAMETER
);
74 /* check the max write size */
75 if (in_data_length
> req
->sconn
->smb2
.max_write
) {
76 DEBUG(2,("smbd_smb2_request_process_write : "
77 "client ignored max write :%s: 0x%08X: 0x%08X\n",
78 __location__
, in_data_length
, req
->sconn
->smb2
.max_write
));
79 return smbd_smb2_request_error(req
, NT_STATUS_INVALID_PARAMETER
);
82 in_data_buffer
.data
= SMBD_SMB2_IN_DYN_PTR(req
);
83 in_data_buffer
.length
= in_data_length
;
85 status
= smbd_smb2_request_verify_creditcharge(req
, in_data_length
);
86 if (!NT_STATUS_IS_OK(status
)) {
87 return smbd_smb2_request_error(req
, status
);
90 in_fsp
= file_fsp_smb2(req
, in_file_id_persistent
, in_file_id_volatile
);
92 return smbd_smb2_request_error(req
, NT_STATUS_FILE_CLOSED
);
95 subreq
= smbd_smb2_write_send(req
, req
->sconn
->ev_ctx
,
100 if (subreq
== NULL
) {
101 return smbd_smb2_request_error(req
, NT_STATUS_NO_MEMORY
);
103 tevent_req_set_callback(subreq
, smbd_smb2_request_write_done
, req
);
105 return smbd_smb2_request_pending_queue(req
, subreq
, 500);
108 static void smbd_smb2_request_write_done(struct tevent_req
*subreq
)
110 struct smbd_smb2_request
*req
= tevent_req_callback_data(subreq
,
111 struct smbd_smb2_request
);
114 uint32_t out_count
= 0;
116 NTSTATUS error
; /* transport error */
118 status
= smbd_smb2_write_recv(subreq
, &out_count
);
120 if (!NT_STATUS_IS_OK(status
)) {
121 error
= smbd_smb2_request_error(req
, status
);
122 if (!NT_STATUS_IS_OK(error
)) {
123 smbd_server_connection_terminate(req
->sconn
,
130 outbody
= data_blob_talloc(req
->out
.vector
, NULL
, 0x10);
131 if (outbody
.data
== NULL
) {
132 error
= smbd_smb2_request_error(req
, NT_STATUS_NO_MEMORY
);
133 if (!NT_STATUS_IS_OK(error
)) {
134 smbd_server_connection_terminate(req
->sconn
,
141 SSVAL(outbody
.data
, 0x00, 0x10 + 1); /* struct size */
142 SSVAL(outbody
.data
, 0x02, 0); /* reserved */
143 SIVAL(outbody
.data
, 0x04, out_count
); /* count */
144 SIVAL(outbody
.data
, 0x08, 0); /* remaining */
145 SSVAL(outbody
.data
, 0x0C, 0); /* write channel info offset */
146 SSVAL(outbody
.data
, 0x0E, 0); /* write channel info length */
148 outdyn
= data_blob_const(NULL
, 0);
150 error
= smbd_smb2_request_done(req
, outbody
, &outdyn
);
151 if (!NT_STATUS_IS_OK(error
)) {
152 smbd_server_connection_terminate(req
->sconn
, nt_errstr(error
));
157 struct smbd_smb2_write_state
{
158 struct smbd_smb2_request
*smb2req
;
159 struct smb_request
*smbreq
;
167 static void smbd_smb2_write_pipe_done(struct tevent_req
*subreq
);
169 static NTSTATUS
smb2_write_complete_internal(struct tevent_req
*req
,
170 ssize_t nwritten
, int err
,
174 struct smbd_smb2_write_state
*state
= tevent_req_data(req
,
175 struct smbd_smb2_write_state
);
176 files_struct
*fsp
= state
->fsp
;
178 if (nwritten
== -1) {
179 status
= map_nt_error_from_unix(err
);
181 DEBUG(2, ("smb2_write failed: %s, file %s, "
182 "length=%lu offset=%lu nwritten=-1: %s\n",
185 (unsigned long)state
->in_length
,
186 (unsigned long)state
->in_offset
,
192 DEBUG(3,("smb2: %s, file %s, "
193 "length=%lu offset=%lu wrote=%lu\n",
196 (unsigned long)state
->in_length
,
197 (unsigned long)state
->in_offset
,
198 (unsigned long)nwritten
));
200 if ((nwritten
== 0) && (state
->in_length
!= 0)) {
201 DEBUG(5,("smb2: write [%s] disk full\n",
203 return NT_STATUS_DISK_FULL
;
207 status
= sync_file(fsp
->conn
, fsp
, state
->write_through
);
208 if (!NT_STATUS_IS_OK(status
)) {
209 DEBUG(5,("smb2: sync_file for %s returned %s\n",
216 state
->out_count
= nwritten
;
221 NTSTATUS
smb2_write_complete(struct tevent_req
*req
, ssize_t nwritten
, int err
)
223 return smb2_write_complete_internal(req
, nwritten
, err
, true);
226 NTSTATUS
smb2_write_complete_nosync(struct tevent_req
*req
, ssize_t nwritten
,
229 return smb2_write_complete_internal(req
, nwritten
, err
, false);
233 static bool smbd_smb2_write_cancel(struct tevent_req
*req
)
235 struct smbd_smb2_write_state
*state
=
237 struct smbd_smb2_write_state
);
239 state
->smb2req
->cancelled
= true;
241 return cancel_smb2_aio(state
->smbreq
);
244 static struct tevent_req
*smbd_smb2_write_send(TALLOC_CTX
*mem_ctx
,
245 struct tevent_context
*ev
,
246 struct smbd_smb2_request
*smb2req
,
247 struct files_struct
*fsp
,
253 struct tevent_req
*req
= NULL
;
254 struct smbd_smb2_write_state
*state
= NULL
;
255 struct smb_request
*smbreq
= NULL
;
256 connection_struct
*conn
= smb2req
->tcon
->compat
;
258 struct lock_struct lock
;
260 req
= tevent_req_create(mem_ctx
, &state
,
261 struct smbd_smb2_write_state
);
265 state
->smb2req
= smb2req
;
266 if (in_flags
& SMB2_WRITEFLAG_WRITE_THROUGH
) {
267 state
->write_through
= true;
269 state
->in_length
= in_data
.length
;
270 state
->out_count
= 0;
272 DEBUG(10,("smbd_smb2_write: %s - %s\n",
273 fsp_str_dbg(fsp
), fsp_fnum_dbg(fsp
)));
275 smbreq
= smbd_smb2_fake_smb_request(smb2req
);
276 if (tevent_req_nomem(smbreq
, req
)) {
277 return tevent_req_post(req
, ev
);
279 state
->smbreq
= smbreq
;
283 if (IS_IPC(smbreq
->conn
)) {
284 struct tevent_req
*subreq
= NULL
;
286 if (!fsp_is_np(fsp
)) {
287 tevent_req_nterror(req
, NT_STATUS_FILE_CLOSED
);
288 return tevent_req_post(req
, ev
);
291 subreq
= np_write_send(state
, ev
,
292 fsp
->fake_file_handle
,
295 if (tevent_req_nomem(subreq
, req
)) {
296 return tevent_req_post(req
, ev
);
298 tevent_req_set_callback(subreq
,
299 smbd_smb2_write_pipe_done
,
304 if (!CHECK_WRITE(fsp
)) {
305 tevent_req_nterror(req
, NT_STATUS_ACCESS_DENIED
);
306 return tevent_req_post(req
, ev
);
309 /* Try and do an asynchronous write. */
310 status
= schedule_aio_smb2_write(conn
,
315 state
->write_through
);
317 if (NT_STATUS_IS_OK(status
)) {
319 * Doing an async write, allow this
320 * request to be canceled
322 tevent_req_set_cancel_fn(req
, smbd_smb2_write_cancel
);
326 if (!NT_STATUS_EQUAL(status
, NT_STATUS_RETRY
)) {
327 /* Real error in setting up aio. Fail. */
328 tevent_req_nterror(req
, status
);
329 return tevent_req_post(req
, ev
);
332 /* Fallback to synchronous. */
333 init_strict_lock_struct(fsp
,
334 fsp
->op
->global
->open_persistent_id
,
340 if (!SMB_VFS_STRICT_LOCK(conn
, fsp
, &lock
)) {
341 tevent_req_nterror(req
, NT_STATUS_FILE_LOCK_CONFLICT
);
342 return tevent_req_post(req
, ev
);
345 nwritten
= write_file(smbreq
, fsp
,
346 (const char *)in_data
.data
,
350 status
= smb2_write_complete(req
, nwritten
, errno
);
352 SMB_VFS_STRICT_UNLOCK(conn
, fsp
, &lock
);
354 DEBUG(10,("smb2: write on "
355 "file %s, offset %.0f, requested %u, written = %u\n",
358 (unsigned int)in_data
.length
,
359 (unsigned int)nwritten
));
361 if (!NT_STATUS_IS_OK(status
)) {
362 tevent_req_nterror(req
, status
);
365 tevent_req_done(req
);
368 return tevent_req_post(req
, ev
);
371 static void smbd_smb2_write_pipe_done(struct tevent_req
*subreq
)
373 struct tevent_req
*req
= tevent_req_callback_data(subreq
,
375 struct smbd_smb2_write_state
*state
= tevent_req_data(req
,
376 struct smbd_smb2_write_state
);
378 ssize_t nwritten
= -1;
380 status
= np_write_recv(subreq
, &nwritten
);
382 if (!NT_STATUS_IS_OK(status
)) {
383 NTSTATUS old
= status
;
384 status
= nt_status_np_pipe(old
);
385 tevent_req_nterror(req
, status
);
389 if ((nwritten
== 0 && state
->in_length
!= 0) || (nwritten
< 0)) {
390 tevent_req_nterror(req
, NT_STATUS_ACCESS_DENIED
);
394 state
->out_count
= nwritten
;
396 tevent_req_done(req
);
399 static NTSTATUS
smbd_smb2_write_recv(struct tevent_req
*req
,
403 struct smbd_smb2_write_state
*state
= tevent_req_data(req
,
404 struct smbd_smb2_write_state
);
406 if (tevent_req_is_nterror(req
, &status
)) {
407 tevent_req_received(req
);
411 *out_count
= state
->out_count
;
413 tevent_req_received(req
);