source3/libsmb/smb2cli_flush.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    smb2 lib
   4    Copyright (C) Volker Lendecke 2011
   5
   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.
  10
  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.
  15
  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/>.
  18 */
  19
  20 #include "includes.h"
  21 #include "client.h"
  22 #include "async_smb.h"
  23 #include "smb2cli_base.h"
  24 #include "smb2cli.h"
  25 #include "libsmb/proto.h"
  26 #include "lib/util/tevent_ntstatus.h"
  27
  28 struct smb2cli_flush_state {
  29         uint8_t fixed[24];
  30 };
  31
  32 static void smb2cli_flush_done(struct tevent_req *subreq);
  33
  34 struct tevent_req *smb2cli_flush_send(TALLOC_CTX *mem_ctx,
  35                                        struct tevent_context *ev,
  36                                        struct cli_state *cli,
  37                                        uint64_t fid_persistent,
  38                                        uint64_t fid_volatile)
  39 {
  40         struct tevent_req *req, *subreq;
  41         struct smb2cli_flush_state *state;
  42         uint8_t *fixed;
  43
  44         req = tevent_req_create(mem_ctx, &state,
  45                                 struct smb2cli_flush_state);
  46         if (req == NULL) {
  47                 return NULL;
  48         }
  49         fixed = state->fixed;
  50         SSVAL(fixed, 0, 24);
  51         SBVAL(fixed, 8, fid_persistent);
  52         SBVAL(fixed, 16, fid_volatile);
  53
  54         subreq = smb2cli_req_send(state, ev, cli, SMB2_OP_FLUSH,
  55                                   0, 0, /* flags */
  56                                   cli->smb2.pid,
  57                                   cli->smb2.tid,
  58                                   cli->smb2.uid,
  59                                   state->fixed, sizeof(state->fixed),
  60                                   NULL, 0);
  61         if (tevent_req_nomem(subreq, req)) {
  62                 return tevent_req_post(req, ev);
  63         }
  64         tevent_req_set_callback(subreq, smb2cli_flush_done, req);
  65         return req;
  66 }
  67
  68 static void smb2cli_flush_done(struct tevent_req *subreq)
  69 {
  70         struct tevent_req *req =
  71                 tevent_req_callback_data(subreq,
  72                 struct tevent_req);
  73         NTSTATUS status;
  74         struct iovec *iov;
  75         static const struct smb2cli_req_expected_response expected[] = {
  76         {
  77                 .status = NT_STATUS_OK,
  78                 .body_size = 0x04
  79         }
  80         };
  81
  82         status = smb2cli_req_recv(subreq, talloc_tos(), &iov,
  83                                   expected, ARRAY_SIZE(expected));
  84         if (tevent_req_nterror(req, status)) {
  85                 return;
  86         }
  87         tevent_req_done(req);
  88 }
  89
  90 NTSTATUS smb2cli_flush_recv(struct tevent_req *req)
  91 {
  92         return tevent_req_simple_recv_ntstatus(req);
  93 }
  94
  95 NTSTATUS smb2cli_flush(struct cli_state *cli,
  96                        uint64_t fid_persistent,
  97                        uint64_t fid_volatile)
  98 {
  99         TALLOC_CTX *frame = talloc_stackframe();
 100         struct event_context *ev;
 101         struct tevent_req *req;
 102         NTSTATUS status = NT_STATUS_NO_MEMORY;
 103
 104         if (cli_has_async_calls(cli)) {
 105                 /*
 106                  * Can't use sync call while an async call is in flight
 107                  */
 108                 status = NT_STATUS_INVALID_PARAMETER;
 109                 goto fail;
 110         }
 111         ev = event_context_init(frame);
 112         if (ev == NULL) {
 113                 goto fail;
 114         }
 115         req = smb2cli_flush_send(frame, ev, cli,
 116                                  fid_persistent, fid_volatile);
 117         if (req == NULL) {
 118                 goto fail;
 119         }
 120         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
 121                 goto fail;
 122         }
 123         status = smb2cli_flush_recv(req);
 124  fail:
 125         TALLOC_FREE(frame);
 126         return status;
 127 }