2 Unix SMB/CIFS implementation.
3 client file read/write routines
4 Copyright (C) Andrew Tridgell 1994-1998
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
21 #include "libsmb/libsmb.h"
22 #include "../lib/util/tevent_ntstatus.h"
23 #include "async_smb.h"
26 /****************************************************************************
27 Calculate the recommended read buffer size
28 ****************************************************************************/
29 static size_t cli_read_max_bufsize(struct cli_state *cli)
31 size_t data_offset = smb_size - 4;
36 if (!client_is_signing_on(cli) && !cli_encryption_on(cli)
37 && (cli->server_posix_capabilities & CIFS_UNIX_LARGE_READ_CAP)) {
38 return CLI_SAMBA_MAX_POSIX_LARGE_READX_SIZE;
40 if (cli->capabilities & CAP_LARGE_READX) {
42 ? CLI_SAMBA_MAX_LARGE_READX_SIZE
43 : CLI_WINDOWS_MAX_LARGE_READX_SIZE;
46 data_offset += wct * sizeof(uint16_t);
47 data_offset += 1; /* pad */
49 useable_space = cli->max_xmit - data_offset;
54 /****************************************************************************
55 Calculate the recommended write buffer size
56 ****************************************************************************/
57 static size_t cli_write_max_bufsize(struct cli_state *cli,
61 if (write_mode == 0 &&
62 !client_is_signing_on(cli) &&
63 !cli_encryption_on(cli) &&
64 (cli->server_posix_capabilities & CIFS_UNIX_LARGE_WRITE_CAP) &&
65 (cli->capabilities & CAP_LARGE_FILES)) {
66 /* Only do massive writes if we can do them direct
67 * with no signing or encrypting - not on a pipe. */
68 return CLI_SAMBA_MAX_POSIX_LARGE_WRITEX_SIZE;
72 return CLI_SAMBA_MAX_LARGE_WRITEX_SIZE;
75 if (((cli->capabilities & CAP_LARGE_WRITEX) == 0)
76 || client_is_signing_on(cli)
77 || strequal(cli->dev, "LPT1:")) {
78 size_t data_offset = smb_size - 4;
81 data_offset += wct * sizeof(uint16_t);
82 data_offset += 1; /* pad */
84 useable_space = cli->max_xmit - data_offset;
89 return CLI_WINDOWS_MAX_LARGE_WRITEX_SIZE;
92 struct cli_read_andx_state {
100 static void cli_read_andx_done(struct tevent_req *subreq);
102 struct tevent_req *cli_read_andx_create(TALLOC_CTX *mem_ctx,
103 struct event_context *ev,
104 struct cli_state *cli, uint16_t fnum,
105 off_t offset, size_t size,
106 struct tevent_req **psmbreq)
108 struct tevent_req *req, *subreq;
109 struct cli_read_andx_state *state;
112 if (size > cli_read_max_bufsize(cli)) {
113 DEBUG(0, ("cli_read_andx_send got size=%d, can only handle "
114 "size=%d\n", (int)size,
115 (int)cli_read_max_bufsize(cli)));
119 req = tevent_req_create(mem_ctx, &state, struct cli_read_andx_state);
125 SCVAL(state->vwv + 0, 0, 0xFF);
126 SCVAL(state->vwv + 0, 1, 0);
127 SSVAL(state->vwv + 1, 0, 0);
128 SSVAL(state->vwv + 2, 0, fnum);
129 SIVAL(state->vwv + 3, 0, offset);
130 SSVAL(state->vwv + 5, 0, size);
131 SSVAL(state->vwv + 6, 0, size);
132 SSVAL(state->vwv + 7, 0, (size >> 16));
133 SSVAL(state->vwv + 8, 0, 0);
134 SSVAL(state->vwv + 9, 0, 0);
136 if ((uint64_t)offset >> 32) {
137 SIVAL(state->vwv + 10, 0,
138 (((uint64_t)offset)>>32) & 0xffffffff);
142 subreq = cli_smb_req_create(state, ev, cli, SMBreadX, 0, wct,
143 state->vwv, 0, NULL);
144 if (subreq == NULL) {
148 tevent_req_set_callback(subreq, cli_read_andx_done, req);
153 struct tevent_req *cli_read_andx_send(TALLOC_CTX *mem_ctx,
154 struct event_context *ev,
155 struct cli_state *cli, uint16_t fnum,
156 off_t offset, size_t size)
158 struct tevent_req *req, *subreq;
161 req = cli_read_andx_create(mem_ctx, ev, cli, fnum, offset, size,
167 status = cli_smb_req_send(subreq);
168 if (tevent_req_nterror(req, status)) {
169 return tevent_req_post(req, ev);
174 static void cli_read_andx_done(struct tevent_req *subreq)
176 struct tevent_req *req = tevent_req_callback_data(
177 subreq, struct tevent_req);
178 struct cli_read_andx_state *state = tevent_req_data(
179 req, struct cli_read_andx_state);
186 state->status = cli_smb_recv(subreq, state, &inbuf, 12, &wct, &vwv,
189 if (NT_STATUS_IS_ERR(state->status)) {
190 tevent_req_nterror(req, state->status);
194 /* size is the number of bytes the server returned.
196 state->received = SVAL(vwv + 5, 0);
197 state->received |= (((unsigned int)SVAL(vwv + 7, 0)) << 16);
199 if (state->received > state->size) {
200 DEBUG(5,("server returned more than we wanted!\n"));
201 tevent_req_nterror(req, NT_STATUS_UNEXPECTED_IO_ERROR);
206 * bcc field must be valid for small reads, for large reads the 16-bit
207 * bcc field can't be correct.
210 if ((state->received < 0xffff) && (state->received > num_bytes)) {
211 DEBUG(5, ("server announced more bytes than sent\n"));
212 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
216 state->buf = discard_const_p(uint8_t, smb_base(inbuf)) + SVAL(vwv+6, 0);
218 if (trans_oob(smb_len(inbuf), SVAL(vwv+6, 0), state->received)
219 || ((state->received != 0) && (state->buf < bytes))) {
220 DEBUG(5, ("server returned invalid read&x data offset\n"));
221 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
224 tevent_req_done(req);
228 * Pull the data out of a finished async read_and_x request. rcvbuf is
229 * talloced from the request, so better make sure that you copy it away before
230 * you talloc_free(req). "rcvbuf" is NOT a talloc_ctx of its own, so do not
234 NTSTATUS cli_read_andx_recv(struct tevent_req *req, ssize_t *received,
237 struct cli_read_andx_state *state = tevent_req_data(
238 req, struct cli_read_andx_state);
241 if (tevent_req_is_nterror(req, &status)) {
244 *received = state->received;
245 *rcvbuf = state->buf;
249 struct cli_readall_state {
250 struct tevent_context *ev;
251 struct cli_state *cli;
259 static void cli_readall_done(struct tevent_req *subreq);
261 static struct tevent_req *cli_readall_send(TALLOC_CTX *mem_ctx,
262 struct event_context *ev,
263 struct cli_state *cli,
265 off_t offset, size_t size)
267 struct tevent_req *req, *subreq;
268 struct cli_readall_state *state;
270 req = tevent_req_create(mem_ctx, &state, struct cli_readall_state);
277 state->start_offset = offset;
282 subreq = cli_read_andx_send(state, ev, cli, fnum, offset, size);
283 if (tevent_req_nomem(subreq, req)) {
284 return tevent_req_post(req, ev);
286 tevent_req_set_callback(subreq, cli_readall_done, req);
290 static void cli_readall_done(struct tevent_req *subreq)
292 struct tevent_req *req = tevent_req_callback_data(
293 subreq, struct tevent_req);
294 struct cli_readall_state *state = tevent_req_data(
295 req, struct cli_readall_state);
300 status = cli_read_andx_recv(subreq, &received, &buf);
301 if (tevent_req_nterror(req, status)) {
307 tevent_req_done(req);
311 if ((state->received == 0) && (received == state->size)) {
312 /* Ideal case: Got it all in one run */
314 state->received += received;
315 tevent_req_done(req);
320 * We got a short read, issue a read for the
321 * rest. Unfortunately we have to allocate the buffer
322 * ourselves now, as our caller expects to receive a single
323 * buffer. cli_read_andx does it from the buffer received from
324 * the net, but with a short read we have to put it together
325 * from several reads.
328 if (state->buf == NULL) {
329 state->buf = talloc_array(state, uint8_t, state->size);
330 if (tevent_req_nomem(state->buf, req)) {
334 memcpy(state->buf + state->received, buf, received);
335 state->received += received;
339 if (state->received >= state->size) {
340 tevent_req_done(req);
344 subreq = cli_read_andx_send(state, state->ev, state->cli, state->fnum,
345 state->start_offset + state->received,
346 state->size - state->received);
347 if (tevent_req_nomem(subreq, req)) {
350 tevent_req_set_callback(subreq, cli_readall_done, req);
353 static NTSTATUS cli_readall_recv(struct tevent_req *req, ssize_t *received,
356 struct cli_readall_state *state = tevent_req_data(
357 req, struct cli_readall_state);
360 if (tevent_req_is_nterror(req, &status)) {
363 *received = state->received;
364 *rcvbuf = state->buf;
368 struct cli_pull_subreq {
369 struct tevent_req *req;
375 * Parallel read support.
377 * cli_pull sends as many read&x requests as the server would allow via
378 * max_mux at a time. When replies flow back in, the data is written into
379 * the callback function "sink" in the right order.
382 struct cli_pull_state {
383 struct tevent_req *req;
385 struct event_context *ev;
386 struct cli_state *cli;
391 NTSTATUS (*sink)(char *buf, size_t n, void *priv);
397 * Outstanding requests
400 struct cli_pull_subreq *reqs;
403 * For how many bytes did we send requests already?
408 * Next request index to push into "sink". This walks around the "req"
409 * array, taking care that the requests are pushed to "sink" in the
410 * right order. If necessary (i.e. replies don't come in in the right
411 * order), replies are held back in "reqs".
416 * How many bytes did we push into "sink"?
422 static char *cli_pull_print(struct tevent_req *req, TALLOC_CTX *mem_ctx)
424 struct cli_pull_state *state = tevent_req_data(
425 req, struct cli_pull_state);
428 result = tevent_req_default_print(req, mem_ctx);
429 if (result == NULL) {
433 return talloc_asprintf_append_buffer(
434 result, "num_reqs=%d, top_req=%d",
435 state->num_reqs, state->top_req);
438 static void cli_pull_read_done(struct tevent_req *read_req);
441 * Prepare an async pull request
444 struct tevent_req *cli_pull_send(TALLOC_CTX *mem_ctx,
445 struct event_context *ev,
446 struct cli_state *cli,
447 uint16_t fnum, off_t start_offset,
448 SMB_OFF_T size, size_t window_size,
449 NTSTATUS (*sink)(char *buf, size_t n,
453 struct tevent_req *req;
454 struct cli_pull_state *state;
457 req = tevent_req_create(mem_ctx, &state, struct cli_pull_state);
461 tevent_req_set_print_fn(req, cli_pull_print);
467 state->start_offset = start_offset;
476 tevent_req_done(req);
477 return tevent_req_post(req, ev);
480 state->chunk_size = cli_read_max_bufsize(cli);
482 state->num_reqs = MAX(window_size/state->chunk_size, 1);
483 state->num_reqs = MIN(state->num_reqs, cli->max_mux);
485 state->reqs = talloc_zero_array(state, struct cli_pull_subreq,
487 if (state->reqs == NULL) {
491 state->requested = 0;
493 for (i=0; i<state->num_reqs; i++) {
494 struct cli_pull_subreq *subreq = &state->reqs[i];
496 size_t request_thistime;
498 if (state->requested >= size) {
503 size_left = size - state->requested;
504 request_thistime = MIN(size_left, state->chunk_size);
506 subreq->req = cli_readall_send(
507 state->reqs, ev, cli, fnum,
508 state->start_offset + state->requested,
511 if (subreq->req == NULL) {
514 tevent_req_set_callback(subreq->req, cli_pull_read_done, req);
515 state->requested += request_thistime;
525 * Handle incoming read replies, push the data into sink and send out new
526 * requests if necessary.
529 static void cli_pull_read_done(struct tevent_req *subreq)
531 struct tevent_req *req = tevent_req_callback_data(
532 subreq, struct tevent_req);
533 struct cli_pull_state *state = tevent_req_data(
534 req, struct cli_pull_state);
535 struct cli_pull_subreq *pull_subreq = NULL;
539 for (i = 0; i < state->num_reqs; i++) {
540 pull_subreq = &state->reqs[i];
541 if (subreq == pull_subreq->req) {
545 if (i == state->num_reqs) {
546 /* Huh -- received something we did not send?? */
547 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
551 status = cli_readall_recv(subreq, &pull_subreq->received,
553 if (!NT_STATUS_IS_OK(status)) {
554 tevent_req_nterror(state->req, status);
559 * This loop is the one to take care of out-of-order replies. All
560 * pending requests are in state->reqs, state->reqs[top_req] is the
561 * one that is to be pushed next. If however a request later than
562 * top_req is replied to, then we can't push yet. If top_req is
563 * replied to at a later point then, we need to push all the finished
567 while (state->reqs[state->top_req].req != NULL) {
568 struct cli_pull_subreq *top_subreq;
570 DEBUG(11, ("cli_pull_read_done: top_req = %d\n",
573 top_subreq = &state->reqs[state->top_req];
575 if (tevent_req_is_in_progress(top_subreq->req)) {
576 DEBUG(11, ("cli_pull_read_done: top request not yet "
581 DEBUG(10, ("cli_pull_read_done: Pushing %d bytes, %d already "
582 "pushed\n", (int)top_subreq->received,
583 (int)state->pushed));
585 status = state->sink((char *)top_subreq->buf,
586 top_subreq->received, state->priv);
587 if (tevent_req_nterror(state->req, status)) {
590 state->pushed += top_subreq->received;
592 TALLOC_FREE(state->reqs[state->top_req].req);
594 if (state->requested < state->size) {
595 struct tevent_req *new_req;
597 size_t request_thistime;
599 size_left = state->size - state->requested;
600 request_thistime = MIN(size_left, state->chunk_size);
602 DEBUG(10, ("cli_pull_read_done: Requesting %d bytes "
603 "at %d, position %d\n",
604 (int)request_thistime,
605 (int)(state->start_offset
609 new_req = cli_readall_send(
610 state->reqs, state->ev, state->cli,
612 state->start_offset + state->requested,
615 if (tevent_req_nomem(new_req, state->req)) {
618 tevent_req_set_callback(new_req, cli_pull_read_done,
621 state->reqs[state->top_req].req = new_req;
622 state->requested += request_thistime;
625 state->top_req = (state->top_req+1) % state->num_reqs;
628 tevent_req_done(req);
631 NTSTATUS cli_pull_recv(struct tevent_req *req, SMB_OFF_T *received)
633 struct cli_pull_state *state = tevent_req_data(
634 req, struct cli_pull_state);
637 if (tevent_req_is_nterror(req, &status)) {
640 *received = state->pushed;
644 NTSTATUS cli_pull(struct cli_state *cli, uint16_t fnum,
645 off_t start_offset, SMB_OFF_T size, size_t window_size,
646 NTSTATUS (*sink)(char *buf, size_t n, void *priv),
647 void *priv, SMB_OFF_T *received)
649 TALLOC_CTX *frame = talloc_stackframe();
650 struct event_context *ev;
651 struct tevent_req *req;
652 NTSTATUS status = NT_STATUS_OK;
654 if (cli_has_async_calls(cli)) {
656 * Can't use sync call while an async call is in flight
658 status = NT_STATUS_INVALID_PARAMETER;
662 ev = event_context_init(frame);
664 status = NT_STATUS_NO_MEMORY;
668 req = cli_pull_send(frame, ev, cli, fnum, start_offset, size,
669 window_size, sink, priv);
671 status = NT_STATUS_NO_MEMORY;
675 if (!tevent_req_poll(req, ev)) {
676 status = map_nt_error_from_unix(errno);
680 status = cli_pull_recv(req, received);
686 static NTSTATUS cli_read_sink(char *buf, size_t n, void *priv)
688 char **pbuf = (char **)priv;
689 memcpy(*pbuf, buf, n);
694 ssize_t cli_read(struct cli_state *cli, uint16_t fnum, char *buf,
695 off_t offset, size_t size)
700 status = cli_pull(cli, fnum, offset, size, size,
701 cli_read_sink, &buf, &ret);
702 if (!NT_STATUS_IS_OK(status)) {
708 /****************************************************************************
709 write to a file using a SMBwrite and not bypassing 0 byte writes
710 ****************************************************************************/
712 NTSTATUS cli_smbwrite(struct cli_state *cli, uint16_t fnum, char *buf,
713 off_t offset, size_t size1, size_t *ptotal)
722 bytes = talloc_array(talloc_tos(), uint8_t, 3);
724 return NT_STATUS_NO_MEMORY;
729 size_t size = MIN(size1, cli->max_xmit - 48);
730 struct tevent_req *req;
735 SSVAL(vwv+0, 0, fnum);
736 SSVAL(vwv+1, 0, size);
737 SIVAL(vwv+2, 0, offset);
740 bytes = talloc_realloc(talloc_tos(), bytes, uint8_t,
743 return NT_STATUS_NO_MEMORY;
745 SSVAL(bytes, 1, size);
746 memcpy(bytes + 3, buf + total, size);
748 status = cli_smb(talloc_tos(), cli, SMBwrite, 0, 5, vwv,
749 size+3, bytes, &req, 1, NULL, &ret_vwv,
751 if (!NT_STATUS_IS_OK(status)) {
756 size = SVAL(ret_vwv+0, 0);
769 if (ptotal != NULL) {
776 * Send a write&x request
779 struct cli_write_andx_state {
787 static void cli_write_andx_done(struct tevent_req *subreq);
789 struct tevent_req *cli_write_andx_create(TALLOC_CTX *mem_ctx,
790 struct event_context *ev,
791 struct cli_state *cli, uint16_t fnum,
792 uint16_t mode, const uint8_t *buf,
793 off_t offset, size_t size,
794 struct tevent_req **reqs_before,
796 struct tevent_req **psmbreq)
798 struct tevent_req *req, *subreq;
799 struct cli_write_andx_state *state;
800 bool bigoffset = ((cli->capabilities & CAP_LARGE_FILES) != 0);
801 uint8_t wct = bigoffset ? 14 : 12;
802 size_t max_write = cli_write_max_bufsize(cli, mode, wct);
805 req = tevent_req_create(mem_ctx, &state, struct cli_write_andx_state);
810 size = MIN(size, max_write);
814 SCVAL(vwv+0, 0, 0xFF);
817 SSVAL(vwv+2, 0, fnum);
818 SIVAL(vwv+3, 0, offset);
820 SSVAL(vwv+7, 0, mode);
822 SSVAL(vwv+9, 0, (size>>16));
823 SSVAL(vwv+10, 0, size);
826 cli_smb_wct_ofs(reqs_before, num_reqs_before)
827 + 1 /* the wct field */
829 + 2 /* num_bytes field */
833 SIVAL(vwv+12, 0, (((uint64_t)offset)>>32) & 0xffffffff);
837 state->iov[0].iov_base = (void *)&state->pad;
838 state->iov[0].iov_len = 1;
839 state->iov[1].iov_base = discard_const_p(void, buf);
840 state->iov[1].iov_len = size;
842 subreq = cli_smb_req_create(state, ev, cli, SMBwriteX, 0, wct, vwv,
844 if (tevent_req_nomem(subreq, req)) {
845 return tevent_req_post(req, ev);
847 tevent_req_set_callback(subreq, cli_write_andx_done, req);
852 struct tevent_req *cli_write_andx_send(TALLOC_CTX *mem_ctx,
853 struct event_context *ev,
854 struct cli_state *cli, uint16_t fnum,
855 uint16_t mode, const uint8_t *buf,
856 off_t offset, size_t size)
858 struct tevent_req *req, *subreq;
861 req = cli_write_andx_create(mem_ctx, ev, cli, fnum, mode, buf, offset,
862 size, NULL, 0, &subreq);
867 status = cli_smb_req_send(subreq);
868 if (tevent_req_nterror(req, status)) {
869 return tevent_req_post(req, ev);
874 static void cli_write_andx_done(struct tevent_req *subreq)
876 struct tevent_req *req = tevent_req_callback_data(
877 subreq, struct tevent_req);
878 struct cli_write_andx_state *state = tevent_req_data(
879 req, struct cli_write_andx_state);
885 status = cli_smb_recv(subreq, state, &inbuf, 6, &wct, &vwv,
888 if (NT_STATUS_IS_ERR(status)) {
889 tevent_req_nterror(req, status);
892 state->written = SVAL(vwv+2, 0);
893 state->written |= SVAL(vwv+4, 0)<<16;
894 tevent_req_done(req);
897 NTSTATUS cli_write_andx_recv(struct tevent_req *req, size_t *pwritten)
899 struct cli_write_andx_state *state = tevent_req_data(
900 req, struct cli_write_andx_state);
903 if (tevent_req_is_nterror(req, &status)) {
906 *pwritten = state->written;
910 struct cli_writeall_state {
911 struct event_context *ev;
912 struct cli_state *cli;
921 static void cli_writeall_written(struct tevent_req *req);
923 static struct tevent_req *cli_writeall_send(TALLOC_CTX *mem_ctx,
924 struct event_context *ev,
925 struct cli_state *cli,
929 off_t offset, size_t size)
931 struct tevent_req *req, *subreq;
932 struct cli_writeall_state *state;
934 req = tevent_req_create(mem_ctx, &state, struct cli_writeall_state);
943 state->offset = offset;
947 subreq = cli_write_andx_send(state, state->ev, state->cli, state->fnum,
948 state->mode, state->buf, state->offset,
950 if (tevent_req_nomem(subreq, req)) {
951 return tevent_req_post(req, ev);
953 tevent_req_set_callback(subreq, cli_writeall_written, req);
957 static void cli_writeall_written(struct tevent_req *subreq)
959 struct tevent_req *req = tevent_req_callback_data(
960 subreq, struct tevent_req);
961 struct cli_writeall_state *state = tevent_req_data(
962 req, struct cli_writeall_state);
964 size_t written, to_write;
966 status = cli_write_andx_recv(subreq, &written);
968 if (tevent_req_nterror(req, status)) {
972 state->written += written;
974 if (state->written > state->size) {
975 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
979 to_write = state->size - state->written;
982 tevent_req_done(req);
986 subreq = cli_write_andx_send(state, state->ev, state->cli, state->fnum,
988 state->buf + state->written,
989 state->offset + state->written, to_write);
990 if (tevent_req_nomem(subreq, req)) {
993 tevent_req_set_callback(subreq, cli_writeall_written, req);
996 static NTSTATUS cli_writeall_recv(struct tevent_req *req,
999 struct cli_writeall_state *state = tevent_req_data(
1000 req, struct cli_writeall_state);
1003 if (tevent_req_is_nterror(req, &status)) {
1006 if (pwritten != NULL) {
1007 *pwritten = state->written;
1009 return NT_STATUS_OK;
1012 NTSTATUS cli_writeall(struct cli_state *cli, uint16_t fnum, uint16_t mode,
1013 const uint8_t *buf, off_t offset, size_t size,
1016 TALLOC_CTX *frame = talloc_stackframe();
1017 struct event_context *ev;
1018 struct tevent_req *req;
1019 NTSTATUS status = NT_STATUS_NO_MEMORY;
1021 if (cli_has_async_calls(cli)) {
1023 * Can't use sync call while an async call is in flight
1025 status = NT_STATUS_INVALID_PARAMETER;
1028 ev = event_context_init(frame);
1032 req = cli_writeall_send(frame, ev, cli, fnum, mode, buf, offset, size);
1036 if (!tevent_req_poll(req, ev)) {
1037 status = map_nt_error_from_unix(errno);
1040 status = cli_writeall_recv(req, pwritten);
1046 struct cli_push_write_state {
1047 struct tevent_req *req;/* This is the main request! Not the subreq */
1054 struct cli_push_state {
1055 struct event_context *ev;
1056 struct cli_state *cli;
1062 size_t (*source)(uint8_t *buf, size_t n, void *priv);
1071 * Outstanding requests
1075 struct cli_push_write_state **reqs;
1078 static void cli_push_written(struct tevent_req *req);
1080 static bool cli_push_write_setup(struct tevent_req *req,
1081 struct cli_push_state *state,
1084 struct cli_push_write_state *substate;
1085 struct tevent_req *subreq;
1087 substate = talloc(state->reqs, struct cli_push_write_state);
1091 substate->req = req;
1092 substate->idx = idx;
1093 substate->ofs = state->next_offset;
1094 substate->buf = talloc_array(substate, uint8_t, state->chunk_size);
1095 if (!substate->buf) {
1096 talloc_free(substate);
1099 substate->size = state->source(substate->buf,
1102 if (substate->size == 0) {
1104 /* nothing to send */
1105 talloc_free(substate);
1109 subreq = cli_writeall_send(substate,
1110 state->ev, state->cli,
1111 state->fnum, state->mode,
1116 talloc_free(substate);
1119 tevent_req_set_callback(subreq, cli_push_written, substate);
1121 state->reqs[idx] = substate;
1122 state->pending += 1;
1123 state->next_offset += substate->size;
1128 struct tevent_req *cli_push_send(TALLOC_CTX *mem_ctx, struct event_context *ev,
1129 struct cli_state *cli,
1130 uint16_t fnum, uint16_t mode,
1131 off_t start_offset, size_t window_size,
1132 size_t (*source)(uint8_t *buf, size_t n,
1136 struct tevent_req *req;
1137 struct cli_push_state *state;
1140 req = tevent_req_create(mem_ctx, &state, struct cli_push_state);
1147 state->start_offset = start_offset;
1149 state->source = source;
1153 state->next_offset = start_offset;
1155 state->chunk_size = cli_write_max_bufsize(cli, mode, 14);
1157 if (window_size == 0) {
1158 window_size = cli->max_mux * state->chunk_size;
1160 state->num_reqs = window_size/state->chunk_size;
1161 if ((window_size % state->chunk_size) > 0) {
1162 state->num_reqs += 1;
1164 state->num_reqs = MIN(state->num_reqs, cli->max_mux);
1165 state->num_reqs = MAX(state->num_reqs, 1);
1167 state->reqs = talloc_zero_array(state, struct cli_push_write_state *,
1169 if (state->reqs == NULL) {
1173 for (i=0; i<state->num_reqs; i++) {
1174 if (!cli_push_write_setup(req, state, i)) {
1183 if (state->pending == 0) {
1184 tevent_req_done(req);
1185 return tevent_req_post(req, ev);
1191 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
1192 return tevent_req_post(req, ev);
1195 static void cli_push_written(struct tevent_req *subreq)
1197 struct cli_push_write_state *substate = tevent_req_callback_data(
1198 subreq, struct cli_push_write_state);
1199 struct tevent_req *req = substate->req;
1200 struct cli_push_state *state = tevent_req_data(
1201 req, struct cli_push_state);
1203 uint32_t idx = substate->idx;
1205 state->reqs[idx] = NULL;
1206 state->pending -= 1;
1208 status = cli_writeall_recv(subreq, NULL);
1209 TALLOC_FREE(subreq);
1210 TALLOC_FREE(substate);
1211 if (tevent_req_nterror(req, status)) {
1216 if (!cli_push_write_setup(req, state, idx)) {
1217 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
1222 if (state->pending == 0) {
1223 tevent_req_done(req);
1228 NTSTATUS cli_push_recv(struct tevent_req *req)
1230 return tevent_req_simple_recv_ntstatus(req);
1233 NTSTATUS cli_push(struct cli_state *cli, uint16_t fnum, uint16_t mode,
1234 off_t start_offset, size_t window_size,
1235 size_t (*source)(uint8_t *buf, size_t n, void *priv),
1238 TALLOC_CTX *frame = talloc_stackframe();
1239 struct event_context *ev;
1240 struct tevent_req *req;
1241 NTSTATUS status = NT_STATUS_OK;
1243 if (cli_has_async_calls(cli)) {
1245 * Can't use sync call while an async call is in flight
1247 status = NT_STATUS_INVALID_PARAMETER;
1251 ev = event_context_init(frame);
1253 status = NT_STATUS_NO_MEMORY;
1257 req = cli_push_send(frame, ev, cli, fnum, mode, start_offset,
1258 window_size, source, priv);
1260 status = NT_STATUS_NO_MEMORY;
1264 if (!tevent_req_poll(req, ev)) {
1265 status = map_nt_error_from_unix(errno);
1269 status = cli_push_recv(req);