source: vendor/current/source3/smbd/smb2_flush.c

Last change on this file was 988, checked in by Silvan Scherrer, 9 years ago

Samba Server: update vendor to version 4.4.3
File size: 5.6 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3 Core SMB2 server
4
5 Copyright (C) Stefan Metzmacher 2009
6
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.
11
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.
16
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/>.
19*/
20
21#include "includes.h"
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
27static struct tevent_req *smbd_smb2_flush_send(TALLOC_CTX *mem_ctx,
28 struct tevent_context *ev,
29 struct smbd_smb2_request *smb2req,
30 struct files_struct *fsp);
31static NTSTATUS smbd_smb2_flush_recv(struct tevent_req *req);
32
33static void smbd_smb2_request_flush_done(struct tevent_req *subreq);
34NTSTATUS smbd_smb2_request_process_flush(struct smbd_smb2_request *req)
35{
36 NTSTATUS status;
37 const uint8_t *inbody;
38 uint64_t in_file_id_persistent;
39 uint64_t in_file_id_volatile;
40 struct files_struct *in_fsp;
41 struct tevent_req *subreq;
42
43 status = smbd_smb2_request_verify_sizes(req, 0x18);
44 if (!NT_STATUS_IS_OK(status)) {
45 return smbd_smb2_request_error(req, status);
46 }
47 inbody = SMBD_SMB2_IN_BODY_PTR(req);
48
49 in_file_id_persistent = BVAL(inbody, 0x08);
50 in_file_id_volatile = BVAL(inbody, 0x10);
51
52 in_fsp = file_fsp_smb2(req, in_file_id_persistent, in_file_id_volatile);
53 if (in_fsp == NULL) {
54 return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
55 }
56
57 subreq = smbd_smb2_flush_send(req, req->sconn->ev_ctx,
58 req, in_fsp);
59 if (subreq == NULL) {
60 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
61 }
62 tevent_req_set_callback(subreq, smbd_smb2_request_flush_done, req);
63
64 return smbd_smb2_request_pending_queue(req, subreq, 500);
65}
66
67static void smbd_smb2_request_flush_done(struct tevent_req *subreq)
68{
69 struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
70 struct smbd_smb2_request);
71 DATA_BLOB outbody;
72 NTSTATUS status;
73 NTSTATUS error; /* transport error */
74
75 status = smbd_smb2_flush_recv(subreq);
76 TALLOC_FREE(subreq);
77 if (!NT_STATUS_IS_OK(status)) {
78 error = smbd_smb2_request_error(req, status);
79 if (!NT_STATUS_IS_OK(error)) {
80 smbd_server_connection_terminate(req->xconn,
81 nt_errstr(error));
82 return;
83 }
84 return;
85 }
86
87 outbody = smbd_smb2_generate_outbody(req, 0x04);
88 if (outbody.data == NULL) {
89 error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
90 if (!NT_STATUS_IS_OK(error)) {
91 smbd_server_connection_terminate(req->xconn,
92 nt_errstr(error));
93 return;
94 }
95 return;
96 }
97
98 SSVAL(outbody.data, 0x00, 0x04); /* struct size */
99 SSVAL(outbody.data, 0x02, 0); /* reserved */
100
101 error = smbd_smb2_request_done(req, outbody, NULL);
102 if (!NT_STATUS_IS_OK(error)) {
103 smbd_server_connection_terminate(req->xconn,
104 nt_errstr(error));
105 return;
106 }
107}
108
109struct smbd_smb2_flush_state {
110 struct smbd_smb2_request *smb2req;
111};
112
113static void smbd_smb2_flush_done(struct tevent_req *subreq);
114
115static struct tevent_req *smbd_smb2_flush_send(TALLOC_CTX *mem_ctx,
116 struct tevent_context *ev,
117 struct smbd_smb2_request *smb2req,
118 struct files_struct *fsp)
119{
120 struct tevent_req *req;
121 struct tevent_req *subreq;
122 struct smbd_smb2_flush_state *state;
123 struct smb_request *smbreq;
124 int ret;
125
126 req = tevent_req_create(mem_ctx, &state,
127 struct smbd_smb2_flush_state);
128 if (req == NULL) {
129 return NULL;
130 }
131 state->smb2req = smb2req;
132
133 DEBUG(10,("smbd_smb2_flush: %s - %s\n",
134 fsp_str_dbg(fsp), fsp_fnum_dbg(fsp)));
135
136 smbreq = smbd_smb2_fake_smb_request(smb2req);
137 if (tevent_req_nomem(smbreq, req)) {
138 return tevent_req_post(req, ev);
139 }
140
141 if (IS_IPC(smbreq->conn)) {
142 tevent_req_nterror(req, NT_STATUS_NOT_IMPLEMENTED);
143 return tevent_req_post(req, ev);
144 }
145
146 if (!CHECK_WRITE(fsp)) {
147 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
148 return tevent_req_post(req, ev);
149 }
150
151 if (fsp->fh->fd == -1) {
152 tevent_req_nterror(req, NT_STATUS_INVALID_HANDLE);
153 return tevent_req_post(req, ev);
154 }
155
156 if (!lp_strict_sync(SNUM(smbreq->conn))) {
157 /*
158 * No strict sync. Don't really do
159 * anything here.
160 */
161 tevent_req_done(req);
162 return tevent_req_post(req, ev);
163 }
164
165 ret = flush_write_cache(fsp, SAMBA_SYNC_FLUSH);
166 if (ret == -1) {
167 tevent_req_nterror(req, map_nt_error_from_unix(errno));
168 return tevent_req_post(req, ev);
169 }
170
171 subreq = SMB_VFS_FSYNC_SEND(state, ev, fsp);
172 if (tevent_req_nomem(subreq, req)) {
173 return tevent_req_post(req, ev);
174 }
175
176 tevent_req_set_callback(subreq, smbd_smb2_flush_done, req);
177
178 /* Ensure any close request knows about this outstanding IO. */
179 if (!aio_add_req_to_fsp(fsp, req)) {
180 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
181 return tevent_req_post(req, ev);
182 }
183
184 increment_outstanding_aio_calls();
185 return req;
186
187}
188
189static void smbd_smb2_flush_done(struct tevent_req *subreq)
190{
191 struct tevent_req *req = tevent_req_callback_data(
192 subreq, struct tevent_req);
193 int ret, err;
194
195 decrement_outstanding_aio_calls();
196
197 ret = SMB_VFS_FSYNC_RECV(subreq, &err);
198 TALLOC_FREE(subreq);
199 if (ret == -1) {
200 tevent_req_error(req, err);
201 return;
202 }
203 tevent_req_done(req);
204}
205
206static NTSTATUS smbd_smb2_flush_recv(struct tevent_req *req)
207{
208 NTSTATUS status;
209
210 if (tevent_req_is_nterror(req, &status)) {
211 tevent_req_received(req);
212 return status;
213 }
214
215 tevent_req_received(req);
216 return NT_STATUS_OK;
217}
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