2 Unix SMB/CIFS implementation.
5 Copyright (C) Stefan Metzmacher 2009
6 Copyright (C) David Disseldorp 2012
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 "../libcli/security/security.h"
27 #include "../lib/util/tevent_ntstatus.h"
28 #include "../lib/ccan/build_assert/build_assert.h"
29 #include "include/ntioctl.h"
30 #include "../librpc/ndr/libndr.h"
31 #include "librpc/gen_ndr/ndr_ioctl.h"
32 #include "smb2_ioctl_private.h"
34 #define COPYCHUNK_MAX_CHUNKS 256 /* 2k8r2 & win8 = 256 */
35 #define COPYCHUNK_MAX_CHUNK_LEN 1048576 /* 2k8r2 & win8 = 1048576 */
36 #define COPYCHUNK_MAX_TOTAL_LEN 16777216 /* 2k8r2 & win8 = 16777216 */
37 static void copychunk_pack_limits(struct srv_copychunk_rsp
*cc_rsp
)
39 cc_rsp
->chunks_written
= COPYCHUNK_MAX_CHUNKS
;
40 cc_rsp
->chunk_bytes_written
= COPYCHUNK_MAX_CHUNK_LEN
;
41 cc_rsp
->total_bytes_written
= COPYCHUNK_MAX_TOTAL_LEN
;
44 static NTSTATUS
copychunk_check_limits(struct srv_copychunk_copy
*cc_copy
)
47 uint32_t total_len
= 0;
49 if (cc_copy
->chunk_count
> COPYCHUNK_MAX_CHUNKS
) {
50 return NT_STATUS_INVALID_PARAMETER
;
53 for (i
= 0; i
< cc_copy
->chunk_count
; i
++) {
54 if (cc_copy
->chunks
[i
].length
> COPYCHUNK_MAX_CHUNK_LEN
) {
55 return NT_STATUS_INVALID_PARAMETER
;
57 total_len
+= cc_copy
->chunks
[i
].length
;
59 if (total_len
> COPYCHUNK_MAX_TOTAL_LEN
) {
60 return NT_STATUS_INVALID_PARAMETER
;
66 static void copychunk_unlock_all(struct files_struct
*src_fsp
,
67 struct files_struct
*dst_fsp
,
68 struct lock_struct
*rd_locks
,
69 struct lock_struct
*wr_locks
,
75 for (i
= 0; i
< num_locks
; i
++) {
76 SMB_VFS_STRICT_UNLOCK(src_fsp
->conn
, src_fsp
, &rd_locks
[i
]);
77 SMB_VFS_STRICT_UNLOCK(dst_fsp
->conn
, dst_fsp
, &wr_locks
[i
]);
81 /* request read and write locks for each chunk */
82 static NTSTATUS
copychunk_lock_all(TALLOC_CTX
*mem_ctx
,
83 struct srv_copychunk_copy
*cc_copy
,
84 struct files_struct
*src_fsp
,
85 struct files_struct
*dst_fsp
,
86 struct lock_struct
**rd_locks
,
87 struct lock_struct
**wr_locks
,
92 struct lock_struct
*rlocks
;
93 struct lock_struct
*wlocks
;
95 rlocks
= talloc_array(mem_ctx
, struct lock_struct
,
96 cc_copy
->chunk_count
);
98 status
= NT_STATUS_NO_MEMORY
;
102 wlocks
= talloc_array(mem_ctx
, struct lock_struct
,
103 cc_copy
->chunk_count
);
104 if (wlocks
== NULL
) {
105 status
= NT_STATUS_NO_MEMORY
;
106 goto err_rlocks_free
;
109 for (i
= 0; i
< cc_copy
->chunk_count
; i
++) {
110 init_strict_lock_struct(src_fsp
,
111 src_fsp
->op
->global
->open_persistent_id
,
112 cc_copy
->chunks
[i
].source_off
,
113 cc_copy
->chunks
[i
].length
,
116 init_strict_lock_struct(dst_fsp
,
117 dst_fsp
->op
->global
->open_persistent_id
,
118 cc_copy
->chunks
[i
].target_off
,
119 cc_copy
->chunks
[i
].length
,
123 if (!SMB_VFS_STRICT_LOCK(src_fsp
->conn
, src_fsp
, &rlocks
[i
])) {
124 status
= NT_STATUS_FILE_LOCK_CONFLICT
;
127 if (!SMB_VFS_STRICT_LOCK(dst_fsp
->conn
, dst_fsp
, &wlocks
[i
])) {
128 /* unlock last rlock, otherwise missed by cleanup */
129 SMB_VFS_STRICT_UNLOCK(src_fsp
->conn
, src_fsp
,
131 status
= NT_STATUS_FILE_LOCK_CONFLICT
;
144 /* cleanup all locks successfully issued so far */
145 copychunk_unlock_all(src_fsp
, dst_fsp
, rlocks
, wlocks
, i
);
154 struct fsctl_srv_copychunk_state
{
155 struct connection_struct
*conn
;
156 uint32_t dispatch_count
;
158 uint32_t bad_recv_count
;
161 struct files_struct
*src_fsp
;
162 struct files_struct
*dst_fsp
;
163 struct lock_struct
*wlocks
;
164 struct lock_struct
*rlocks
;
167 COPYCHUNK_OUT_EMPTY
= 0,
168 COPYCHUNK_OUT_LIMITS
,
172 static void fsctl_srv_copychunk_vfs_done(struct tevent_req
*subreq
);
174 static NTSTATUS
copychunk_check_handles(struct files_struct
*src_fsp
,
175 struct files_struct
*dst_fsp
,
176 struct smb_request
*smb1req
)
179 * [MS-SMB2] 3.3.5.15.6 Handling a Server-Side Data Copy Request
180 * If Open.GrantedAccess of the destination file does not
181 * include FILE_WRITE_DATA, then the request MUST be failed with
182 * STATUS_ACCESS_DENIED. If Open.GrantedAccess of the
183 * destination file does not include FILE_READ_DATA access and
184 * the CtlCode is FSCTL_SRV_COPYCHUNK, then the request MUST be
185 * failed with STATUS_ACCESS_DENIED.
187 if (!CHECK_WRITE(dst_fsp
)) {
188 DEBUG(5, ("copy chunk no write on dest handle (%s).\n",
189 smb_fname_str_dbg(dst_fsp
->fsp_name
) ));
190 return NT_STATUS_ACCESS_DENIED
;
192 if (!CHECK_READ(dst_fsp
, smb1req
)) {
193 DEBUG(5, ("copy chunk no read on dest handle (%s).\n",
194 smb_fname_str_dbg(dst_fsp
->fsp_name
) ));
195 return NT_STATUS_ACCESS_DENIED
;
197 if (!CHECK_READ(src_fsp
, smb1req
)) {
198 DEBUG(5, ("copy chunk no read on src handle (%s).\n",
199 smb_fname_str_dbg(src_fsp
->fsp_name
) ));
200 return NT_STATUS_ACCESS_DENIED
;
206 static struct tevent_req
*fsctl_srv_copychunk_send(TALLOC_CTX
*mem_ctx
,
207 struct tevent_context
*ev
,
208 struct files_struct
*dst_fsp
,
210 size_t in_max_output
,
211 struct smbd_smb2_request
*smb2req
)
213 struct tevent_req
*req
;
214 struct srv_copychunk_copy cc_copy
;
215 enum ndr_err_code ndr_ret
;
216 uint64_t src_persistent_h
;
217 uint64_t src_volatile_h
;
219 struct srv_copychunk
*chunk
;
220 struct fsctl_srv_copychunk_state
*state
;
222 req
= tevent_req_create(mem_ctx
, &state
,
223 struct fsctl_srv_copychunk_state
);
227 state
->conn
= dst_fsp
->conn
;
229 if (in_max_output
< sizeof(struct srv_copychunk_rsp
)) {
230 DEBUG(3, ("max output %d not large enough to hold copy chunk "
231 "response %lu\n", (int)in_max_output
,
232 sizeof(struct srv_copychunk_rsp
)));
233 state
->status
= NT_STATUS_INVALID_PARAMETER
;
234 tevent_req_nterror(req
, state
->status
);
235 return tevent_req_post(req
, ev
);
238 ndr_ret
= ndr_pull_struct_blob(in_input
, mem_ctx
, &cc_copy
,
239 (ndr_pull_flags_fn_t
)ndr_pull_srv_copychunk_copy
);
240 if (ndr_ret
!= NDR_ERR_SUCCESS
) {
241 DEBUG(0, ("failed to unmarshall copy chunk req\n"));
242 state
->status
= NT_STATUS_INVALID_PARAMETER
;
243 tevent_req_nterror(req
, state
->status
);
244 return tevent_req_post(req
, ev
);
247 /* persistent/volatile keys sent as the resume key */
248 src_persistent_h
= BVAL(cc_copy
.source_key
, 0);
249 src_volatile_h
= BVAL(cc_copy
.source_key
, 8);
250 state
->src_fsp
= file_fsp_get(smb2req
, src_persistent_h
, src_volatile_h
);
251 if (state
->src_fsp
== NULL
) {
252 DEBUG(3, ("invalid resume key in copy chunk req\n"));
253 state
->status
= NT_STATUS_OBJECT_NAME_NOT_FOUND
;
254 tevent_req_nterror(req
, state
->status
);
255 return tevent_req_post(req
, ev
);
258 state
->dst_fsp
= dst_fsp
;
260 state
->status
= copychunk_check_handles(state
->src_fsp
,
263 if (!NT_STATUS_IS_OK(state
->status
)) {
264 tevent_req_nterror(req
, state
->status
);
265 return tevent_req_post(req
, ev
);
268 state
->status
= copychunk_check_limits(&cc_copy
);
269 if (tevent_req_nterror(req
, state
->status
)) {
270 DEBUG(3, ("copy chunk req exceeds limits\n"));
271 state
->out_data
= COPYCHUNK_OUT_LIMITS
;
272 return tevent_req_post(req
, ev
);
275 /* any errors from here onwards should carry copychunk response data */
276 state
->out_data
= COPYCHUNK_OUT_RSP
;
278 state
->status
= copychunk_lock_all(state
,
285 if (tevent_req_nterror(req
, state
->status
)) {
286 return tevent_req_post(req
, ev
);
289 for (i
= 0; i
< cc_copy
.chunk_count
; i
++) {
290 struct tevent_req
*vfs_subreq
;
291 chunk
= &cc_copy
.chunks
[i
];
292 vfs_subreq
= SMB_VFS_COPY_CHUNK_SEND(dst_fsp
->conn
,
299 if (vfs_subreq
== NULL
) {
300 DEBUG(0, ("VFS copy chunk send failed\n"));
301 state
->status
= NT_STATUS_NO_MEMORY
;
302 if (state
->dispatch_count
== 0) {
303 /* nothing dispatched, return immediately */
304 copychunk_unlock_all(state
->src_fsp
,
309 tevent_req_nterror(req
, state
->status
);
310 return tevent_req_post(req
, ev
);
313 * wait for dispatched to complete before
314 * returning error, locks held.
319 tevent_req_set_callback(vfs_subreq
,
320 fsctl_srv_copychunk_vfs_done
, req
);
321 state
->dispatch_count
++;
324 /* hold locks until all dispatched requests are completed */
328 static void fsctl_srv_copychunk_vfs_done(struct tevent_req
*subreq
)
330 struct tevent_req
*req
= tevent_req_callback_data(
331 subreq
, struct tevent_req
);
332 struct fsctl_srv_copychunk_state
*state
= tevent_req_data(req
,
333 struct fsctl_srv_copychunk_state
);
334 off_t chunk_nwritten
;
338 status
= SMB_VFS_COPY_CHUNK_RECV(state
->conn
, subreq
,
341 if (NT_STATUS_IS_OK(status
)) {
342 DEBUG(10, ("good copy chunk recv %d of %d\n",
344 state
->dispatch_count
));
345 state
->total_written
+= chunk_nwritten
;
347 DEBUG(0, ("bad status in copy chunk recv %d of %d: %s\n",
349 state
->dispatch_count
,
351 state
->bad_recv_count
++;
352 /* may overwrite previous failed status */
353 state
->status
= status
;
356 if (state
->recv_count
!= state
->dispatch_count
) {
358 * Wait for all VFS copy_chunk requests to complete, even
359 * if an error is received for a specific chunk.
364 /* all VFS copy_chunk requests done */
365 copychunk_unlock_all(state
->src_fsp
,
371 if (!tevent_req_nterror(req
, state
->status
)) {
372 tevent_req_done(req
);
376 static NTSTATUS
fsctl_srv_copychunk_recv(struct tevent_req
*req
,
377 struct srv_copychunk_rsp
*cc_rsp
,
380 struct fsctl_srv_copychunk_state
*state
= tevent_req_data(req
,
381 struct fsctl_srv_copychunk_state
);
384 switch (state
->out_data
) {
385 case COPYCHUNK_OUT_EMPTY
:
388 case COPYCHUNK_OUT_LIMITS
:
389 /* 2.2.32.1 - send back our maximum transfer size limits */
390 copychunk_pack_limits(cc_rsp
);
393 case COPYCHUNK_OUT_RSP
:
394 cc_rsp
->chunks_written
= state
->recv_count
- state
->bad_recv_count
;
395 cc_rsp
->chunk_bytes_written
= 0;
396 cc_rsp
->total_bytes_written
= state
->total_written
;
399 default: /* not reached */
403 status
= state
->status
;
404 tevent_req_received(req
);
409 static NTSTATUS
fsctl_validate_neg_info(TALLOC_CTX
*mem_ctx
,
410 struct tevent_context
*ev
,
411 struct smbXsrv_connection
*conn
,
413 uint32_t in_max_output
,
414 DATA_BLOB
*out_output
,
417 uint32_t in_capabilities
;
418 DATA_BLOB in_guid_blob
;
420 uint16_t in_security_mode
;
421 uint16_t in_num_dialects
;
423 DATA_BLOB out_guid_blob
;
426 if (in_input
->length
< 0x18) {
427 return NT_STATUS_INVALID_PARAMETER
;
430 in_capabilities
= IVAL(in_input
->data
, 0x00);
431 in_guid_blob
= data_blob_const(in_input
->data
+ 0x04, 16);
432 in_security_mode
= SVAL(in_input
->data
, 0x14);
433 in_num_dialects
= SVAL(in_input
->data
, 0x16);
435 if (in_input
->length
< (0x18 + in_num_dialects
*2)) {
436 return NT_STATUS_INVALID_PARAMETER
;
439 if (in_max_output
< 0x18) {
440 return NT_STATUS_BUFFER_TOO_SMALL
;
443 status
= GUID_from_ndr_blob(&in_guid_blob
, &in_guid
);
444 if (!NT_STATUS_IS_OK(status
)) {
448 if (in_num_dialects
!= conn
->smb2
.client
.num_dialects
) {
450 return NT_STATUS_ACCESS_DENIED
;
453 for (i
=0; i
< in_num_dialects
; i
++) {
454 uint16_t v
= SVAL(in_input
->data
, 0x18 + i
*2);
456 if (conn
->smb2
.client
.dialects
[i
] != v
) {
458 return NT_STATUS_ACCESS_DENIED
;
462 if (GUID_compare(&in_guid
, &conn
->smb2
.client
.guid
) != 0) {
464 return NT_STATUS_ACCESS_DENIED
;
467 if (in_security_mode
!= conn
->smb2
.client
.security_mode
) {
469 return NT_STATUS_ACCESS_DENIED
;
472 if (in_capabilities
!= conn
->smb2
.client
.capabilities
) {
474 return NT_STATUS_ACCESS_DENIED
;
477 status
= GUID_to_ndr_blob(&conn
->smb2
.server
.guid
, mem_ctx
,
479 if (!NT_STATUS_IS_OK(status
)) {
483 *out_output
= data_blob_talloc(mem_ctx
, NULL
, 0x18);
484 if (out_output
->data
== NULL
) {
485 return NT_STATUS_NO_MEMORY
;
488 SIVAL(out_output
->data
, 0x00, conn
->smb2
.server
.capabilities
);
489 memcpy(out_output
->data
+0x04, out_guid_blob
.data
, 16);
490 SIVAL(out_output
->data
, 0x14, conn
->smb2
.server
.security_mode
);
491 SIVAL(out_output
->data
, 0x16, conn
->smb2
.server
.dialect
);
496 static NTSTATUS
fsctl_srv_req_resume_key(TALLOC_CTX
*mem_ctx
,
497 struct tevent_context
*ev
,
498 struct files_struct
*fsp
,
499 uint32_t in_max_output
,
500 DATA_BLOB
*out_output
)
502 struct req_resume_key_rsp rkey_rsp
;
503 enum ndr_err_code ndr_ret
;
507 return NT_STATUS_FILE_CLOSED
;
510 ZERO_STRUCT(rkey_rsp
);
511 /* combine persistent and volatile handles for the resume key */
512 SBVAL(rkey_rsp
.resume_key
, 0, fsp
->op
->global
->open_persistent_id
);
513 SBVAL(rkey_rsp
.resume_key
, 8, fsp
->op
->global
->open_volatile_id
);
515 ndr_ret
= ndr_push_struct_blob(&output
, mem_ctx
, &rkey_rsp
,
516 (ndr_push_flags_fn_t
)ndr_push_req_resume_key_rsp
);
517 if (ndr_ret
!= NDR_ERR_SUCCESS
) {
518 return NT_STATUS_INTERNAL_ERROR
;
521 if (in_max_output
< output
.length
) {
522 DEBUG(1, ("max output %u too small for resume key rsp %ld\n",
523 in_max_output
, (long int)output
.length
));
524 return NT_STATUS_INVALID_PARAMETER
;
526 *out_output
= output
;
531 static void smb2_ioctl_network_fs_copychunk_done(struct tevent_req
*subreq
);
533 struct tevent_req
*smb2_ioctl_network_fs(uint32_t ctl_code
,
534 struct tevent_context
*ev
,
535 struct tevent_req
*req
,
536 struct smbd_smb2_ioctl_state
*state
)
538 struct tevent_req
*subreq
;
542 case FSCTL_SRV_COPYCHUNK
:
543 subreq
= fsctl_srv_copychunk_send(state
, ev
, state
->fsp
,
545 state
->in_max_output
,
547 if (tevent_req_nomem(subreq
, req
)) {
548 return tevent_req_post(req
, ev
);
550 tevent_req_set_callback(subreq
,
551 smb2_ioctl_network_fs_copychunk_done
,
555 case FSCTL_VALIDATE_NEGOTIATE_INFO
:
556 status
= fsctl_validate_neg_info(state
, ev
,
557 state
->smbreq
->sconn
->conn
,
559 state
->in_max_output
,
562 if (!tevent_req_nterror(req
, status
)) {
563 tevent_req_done(req
);
565 return tevent_req_post(req
, ev
);
567 case FSCTL_SRV_REQUEST_RESUME_KEY
:
568 status
= fsctl_srv_req_resume_key(state
, ev
, state
->fsp
,
569 state
->in_max_output
,
571 if (!tevent_req_nterror(req
, status
)) {
572 tevent_req_done(req
);
574 return tevent_req_post(req
, ev
);
577 uint8_t *out_data
= NULL
;
578 uint32_t out_data_len
= 0;
580 if (state
->fsp
== NULL
) {
581 status
= NT_STATUS_NOT_SUPPORTED
;
583 status
= SMB_VFS_FSCTL(state
->fsp
,
586 state
->smbreq
->flags2
,
587 state
->in_input
.data
,
588 state
->in_input
.length
,
590 state
->in_max_output
,
592 state
->out_output
= data_blob_const(out_data
, out_data_len
);
593 if (NT_STATUS_IS_OK(status
)) {
594 tevent_req_done(req
);
595 return tevent_req_post(req
, ev
);
599 if (NT_STATUS_EQUAL(status
, NT_STATUS_NOT_SUPPORTED
)) {
600 if (IS_IPC(state
->smbreq
->conn
)) {
601 status
= NT_STATUS_FS_DRIVER_REQUIRED
;
603 status
= NT_STATUS_INVALID_DEVICE_REQUEST
;
607 tevent_req_nterror(req
, status
);
608 return tevent_req_post(req
, ev
);
613 tevent_req_nterror(req
, NT_STATUS_INTERNAL_ERROR
);
614 return tevent_req_post(req
, ev
);
617 static void smb2_ioctl_network_fs_copychunk_done(struct tevent_req
*subreq
)
619 struct tevent_req
*req
= tevent_req_callback_data(subreq
,
621 struct smbd_smb2_ioctl_state
*ioctl_state
= tevent_req_data(req
,
622 struct smbd_smb2_ioctl_state
);
623 struct srv_copychunk_rsp cc_rsp
;
625 bool pack_rsp
= false;
628 status
= fsctl_srv_copychunk_recv(subreq
, &cc_rsp
, &pack_rsp
);
630 if (pack_rsp
== true) {
631 enum ndr_err_code ndr_ret
;
632 ndr_ret
= ndr_push_struct_blob(&ioctl_state
->out_output
,
635 (ndr_push_flags_fn_t
)ndr_push_srv_copychunk_rsp
);
636 if (ndr_ret
!= NDR_ERR_SUCCESS
) {
637 status
= NT_STATUS_INTERNAL_ERROR
;
641 if (!tevent_req_nterror(req
, status
)) {
642 tevent_req_done(req
);