2 Unix SMB/CIFS implementation.
3 SMB client oplock functions
4 Copyright (C) Andrew Tridgell 2001
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 "../lib/util/tevent_ntstatus.h"
22 #include "async_smb.h"
24 /****************************************************************************
25 send an ack for an oplock break request
26 ****************************************************************************/
28 struct cli_oplock_ack_state {
32 static void cli_oplock_ack_done(struct tevent_req *subreq);
34 struct tevent_req *cli_oplock_ack_send(TALLOC_CTX *mem_ctx,
35 struct tevent_context *ev,
36 struct cli_state *cli,
37 uint16_t fnum, uint8_t level)
39 struct tevent_req *req, *subreq;
40 struct cli_oplock_ack_state *state;
42 req = tevent_req_create(mem_ctx, &state, struct cli_oplock_ack_state);
46 SCVAL(state->vwv+0, 0, 0xff);
47 SCVAL(state->vwv+0, 1, 0);
48 SSVAL(state->vwv+1, 0, 0);
49 SSVAL(state->vwv+2, 0, fnum);
50 SCVAL(state->vwv+3, 0, LOCKING_ANDX_OPLOCK_RELEASE);
51 SCVAL(state->vwv+3, 1, level);
52 SIVAL(state->vwv+4, 0, 0); /* timeout */
53 SSVAL(state->vwv+6, 0, 0); /* unlockcount */
54 SSVAL(state->vwv+7, 0, 0); /* lockcount */
56 subreq = cli_smb_send(state, ev, cli, SMBlockingX, 0, 8, state->vwv,
58 if (tevent_req_nomem(subreq, req)) {
59 return tevent_req_post(req, ev);
61 tevent_req_set_callback(subreq, cli_oplock_ack_done, req);
65 static void cli_oplock_ack_done(struct tevent_req *subreq)
67 struct tevent_req *req = tevent_req_callback_data(
68 subreq, struct tevent_req);
71 status = cli_smb_recv(subreq, NULL, NULL, 0, NULL, NULL, NULL, NULL);
73 if (!NT_STATUS_IS_OK(status)) {
74 tevent_req_nterror(req, status);
80 NTSTATUS cli_oplock_ack_recv(struct tevent_req *req)
82 return tevent_req_simple_recv_ntstatus(req);
85 NTSTATUS cli_oplock_ack(struct cli_state *cli, uint16_t fnum, unsigned char level)
87 TALLOC_CTX *frame = talloc_stackframe();
88 struct event_context *ev;
89 struct tevent_req *req;
90 NTSTATUS status = NT_STATUS_OK;
92 if (cli_has_async_calls(cli)) {
94 * Can't use sync call while an async call is in flight
96 status = NT_STATUS_INVALID_PARAMETER;
100 ev = event_context_init(frame);
102 status = NT_STATUS_NO_MEMORY;
106 req = cli_oplock_ack_send(frame, ev, cli, fnum, level);
108 status = NT_STATUS_NO_MEMORY;
112 if (!tevent_req_poll(req, ev)) {
113 status = map_nt_error_from_unix(errno);
117 status = cli_oplock_ack_recv(req);
120 if (!NT_STATUS_IS_OK(status)) {
121 cli_set_error(cli, status);
126 /****************************************************************************
127 set the oplock handler for a connection
128 ****************************************************************************/
130 void cli_oplock_handler(struct cli_state *cli,
131 NTSTATUS (*handler)(struct cli_state *, uint16_t, unsigned char))
133 cli->oplock_handler = handler;