source3/smbd/smb2_close.c

   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 #include "lib/tevent_wait.h"
  27
  28 static struct tevent_req *smbd_smb2_close_send(TALLOC_CTX *mem_ctx,
  29                                                struct tevent_context *ev,
  30                                                struct smbd_smb2_request *smb2req,
  31                                                struct files_struct *in_fsp,
  32                                                uint16_t in_flags);
  33 static NTSTATUS smbd_smb2_close_recv(struct tevent_req *req,
  34                                      uint16_t *out_flags,
  35                                      struct timespec *out_creation_ts,
  36                                      struct timespec *out_last_access_ts,
  37                                      struct timespec *out_last_write_ts,
  38                                      struct timespec *out_change_ts,
  39                                      uint64_t *out_allocation_size,
  40                                      uint64_t *out_end_of_file,
  41                                      uint32_t *out_file_attributes);
  42
  43 static void smbd_smb2_request_close_done(struct tevent_req *subreq);
  44
  45 NTSTATUS smbd_smb2_request_process_close(struct smbd_smb2_request *req)
  46 {
  47         const uint8_t *inbody;
  48         uint16_t in_flags;
  49         uint64_t in_file_id_persistent;
  50         uint64_t in_file_id_volatile;
  51         struct files_struct *in_fsp;
  52         NTSTATUS status;
  53         struct tevent_req *subreq;
  54
  55         status = smbd_smb2_request_verify_sizes(req, 0x18);
  56         if (!NT_STATUS_IS_OK(status)) {
  57                 return smbd_smb2_request_error(req, status);
  58         }
  59         inbody = SMBD_SMB2_IN_BODY_PTR(req);
  60
  61         in_flags                = SVAL(inbody, 0x02);
  62         in_file_id_persistent   = BVAL(inbody, 0x08);
  63         in_file_id_volatile     = BVAL(inbody, 0x10);
  64
  65         in_fsp = file_fsp_smb2(req, in_file_id_persistent, in_file_id_volatile);
  66         if (in_fsp == NULL) {
  67                 return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
  68         }
  69
  70         subreq = smbd_smb2_close_send(req, req->sconn->ev_ctx,
  71                                       req, in_fsp, in_flags);
  72         if (subreq == NULL) {
  73                 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
  74         }
  75         tevent_req_set_callback(subreq, smbd_smb2_request_close_done, req);
  76
  77         return smbd_smb2_request_pending_queue(req, subreq, 500);
  78 }
  79
  80 static void smbd_smb2_request_close_done(struct tevent_req *subreq)
  81 {
  82         struct smbd_smb2_request *req =
  83                 tevent_req_callback_data(subreq,
  84                 struct smbd_smb2_request);
  85         DATA_BLOB outbody;
  86         uint16_t out_flags;
  87         connection_struct *conn = req->tcon->compat;
  88         struct timespec out_creation_ts = { 0, };
  89         struct timespec out_last_access_ts = { 0, };
  90         struct timespec out_last_write_ts = { 0, };
  91         struct timespec out_change_ts = { 0, };
  92         uint64_t out_allocation_size;
  93         uint64_t out_end_of_file;
  94         uint32_t out_file_attributes;
  95         NTSTATUS status;
  96         NTSTATUS error;
  97
  98         status = smbd_smb2_close_recv(subreq,
  99                                       &out_flags,
 100                                       &out_creation_ts,
 101                                       &out_last_access_ts,
 102                                       &out_last_write_ts,
 103                                       &out_change_ts,
 104                                       &out_allocation_size,
 105                                       &out_end_of_file,
 106                                       &out_file_attributes);
 107         TALLOC_FREE(subreq);
 108         if (!NT_STATUS_IS_OK(status)) {
 109                 error = smbd_smb2_request_error(req, status);
 110                 if (!NT_STATUS_IS_OK(error)) {
 111                         smbd_server_connection_terminate(req->sconn,
 112                                                          nt_errstr(error));
 113                         return;
 114                 }
 115                 return;
 116         }
 117
 118         outbody = data_blob_talloc(req->out.vector, NULL, 0x3C);
 119         if (outbody.data == NULL) {
 120                 error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 121                 if (!NT_STATUS_IS_OK(error)) {
 122                         smbd_server_connection_terminate(req->sconn,
 123                                                          nt_errstr(error));
 124                         return;
 125                 }
 126                 return;
 127         }
 128
 129         SSVAL(outbody.data, 0x00, 0x3C);        /* struct size */
 130         SSVAL(outbody.data, 0x02, out_flags);
 131         SIVAL(outbody.data, 0x04, 0);           /* reserved */
 132         put_long_date_timespec(conn->ts_res,
 133                 (char *)outbody.data + 0x08, out_creation_ts);
 134         put_long_date_timespec(conn->ts_res,
 135                 (char *)outbody.data + 0x10, out_last_access_ts);
 136         put_long_date_timespec(conn->ts_res,
 137                 (char *)outbody.data + 0x18, out_last_write_ts);
 138         put_long_date_timespec(conn->ts_res,
 139                 (char *)outbody.data + 0x20, out_change_ts);
 140         SBVAL(outbody.data, 0x28, out_allocation_size);
 141         SBVAL(outbody.data, 0x30, out_end_of_file);
 142         SIVAL(outbody.data, 0x38, out_file_attributes);
 143
 144         error = smbd_smb2_request_done(req, outbody, NULL);
 145         if (!NT_STATUS_IS_OK(error)) {
 146                 smbd_server_connection_terminate(req->sconn,
 147                                                  nt_errstr(error));
 148                 return;
 149         }
 150 }
 151
 152 static NTSTATUS smbd_smb2_close(struct smbd_smb2_request *req,
 153                                 struct files_struct *fsp,
 154                                 uint16_t in_flags,
 155                                 uint16_t *out_flags,
 156                                 struct timespec *out_creation_ts,
 157                                 struct timespec *out_last_access_ts,
 158                                 struct timespec *out_last_write_ts,
 159                                 struct timespec *out_change_ts,
 160                                 uint64_t *out_allocation_size,
 161                                 uint64_t *out_end_of_file,
 162                                 uint32_t *out_file_attributes)
 163 {
 164         NTSTATUS status;
 165         struct smb_request *smbreq;
 166         connection_struct *conn = req->tcon->compat;
 167         struct smb_filename *smb_fname = NULL;
 168         uint64_t allocation_size = 0;
 169         uint64_t file_size = 0;
 170         uint32_t dos_attrs = 0;
 171         uint16_t flags = 0;
 172         bool posix_open = false;
 173
 174         ZERO_STRUCTP(out_creation_ts);
 175         ZERO_STRUCTP(out_last_access_ts);
 176         ZERO_STRUCTP(out_last_write_ts);
 177         ZERO_STRUCTP(out_change_ts);
 178
 179         *out_flags = 0;
 180         *out_allocation_size = 0;
 181         *out_end_of_file = 0;
 182         *out_file_attributes = 0;
 183
 184         DEBUG(10,("smbd_smb2_close: %s - %s\n",
 185                   fsp_str_dbg(fsp), fsp_fnum_dbg(fsp)));
 186
 187         smbreq = smbd_smb2_fake_smb_request(req);
 188         if (smbreq == NULL) {
 189                 return NT_STATUS_NO_MEMORY;
 190         }
 191
 192         posix_open = fsp->posix_open;
 193         status = copy_smb_filename(talloc_tos(),
 194                                 fsp->fsp_name,
 195                                 &smb_fname);
 196         if (!NT_STATUS_IS_OK(status)) {
 197                 return status;
 198         }
 199
 200         status = close_file(smbreq, fsp, NORMAL_CLOSE);
 201         if (!NT_STATUS_IS_OK(status)) {
 202                 DEBUG(5,("smbd_smb2_close: close_file[%s]: %s\n",
 203                          fsp_str_dbg(fsp), nt_errstr(status)));
 204                 return status;
 205         }
 206
 207         if (in_flags & SMB2_CLOSE_FLAGS_FULL_INFORMATION) {
 208                 int ret;
 209                 if (posix_open) {
 210                         ret = SMB_VFS_LSTAT(conn, smb_fname);
 211                 } else {
 212                         ret = SMB_VFS_STAT(conn, smb_fname);
 213                 }
 214                 if (ret == 0) {
 215                         flags = SMB2_CLOSE_FLAGS_FULL_INFORMATION;
 216                         dos_attrs = dos_mode(conn, smb_fname);
 217                         *out_last_write_ts = smb_fname->st.st_ex_mtime;
 218                         *out_last_access_ts = smb_fname->st.st_ex_atime;
 219                         *out_creation_ts = get_create_timespec(conn, NULL, smb_fname);
 220                         *out_change_ts = get_change_timespec(conn, NULL, smb_fname);
 221
 222                         if (lp_dos_filetime_resolution(SNUM(conn))) {
 223                                 dos_filetime_timespec(out_creation_ts);
 224                                 dos_filetime_timespec(out_last_write_ts);
 225                                 dos_filetime_timespec(out_last_access_ts);
 226                                 dos_filetime_timespec(out_change_ts);
 227                         }
 228                         if (!(dos_attrs & FILE_ATTRIBUTE_DIRECTORY)) {
 229                                 file_size = get_file_size_stat(&smb_fname->st);
 230                         }
 231
 232                         allocation_size = SMB_VFS_GET_ALLOC_SIZE(conn, NULL, &smb_fname->st);
 233                 }
 234         }
 235
 236         *out_flags = flags;
 237         *out_allocation_size = allocation_size;
 238         *out_end_of_file = file_size;
 239         *out_file_attributes = dos_attrs;
 240
 241         return NT_STATUS_OK;
 242 }
 243
 244 struct smbd_smb2_close_state {
 245         struct smbd_smb2_request *smb2req;
 246         struct files_struct *in_fsp;
 247         uint16_t in_flags;
 248         uint16_t out_flags;
 249         struct timespec out_creation_ts;
 250         struct timespec out_last_access_ts;
 251         struct timespec out_last_write_ts;
 252         struct timespec out_change_ts;
 253         uint64_t out_allocation_size;
 254         uint64_t out_end_of_file;
 255         uint32_t out_file_attributes;
 256 };
 257
 258 static void smbd_smb2_close_do(struct tevent_req *subreq);
 259
 260 static struct tevent_req *smbd_smb2_close_send(TALLOC_CTX *mem_ctx,
 261                                                struct tevent_context *ev,
 262                                                struct smbd_smb2_request *smb2req,
 263                                                struct files_struct *in_fsp,
 264                                                uint16_t in_flags)
 265 {
 266         struct tevent_req *req;
 267         struct smbd_smb2_close_state *state;
 268         NTSTATUS status;
 269
 270         req = tevent_req_create(mem_ctx, &state,
 271                                 struct smbd_smb2_close_state);
 272         if (req == NULL) {
 273                 return NULL;
 274         }
 275         state->smb2req = smb2req;
 276         state->in_fsp = in_fsp;
 277         state->in_flags = in_flags;
 278
 279         if (in_fsp->num_aio_requests != 0) {
 280
 281                 in_fsp->deferred_close = tevent_wait_send(in_fsp, ev);
 282                 if (tevent_req_nomem(in_fsp->deferred_close, req)) {
 283                         return tevent_req_post(req, ev);
 284                 }
 285                 tevent_req_set_callback(in_fsp->deferred_close,
 286                                         smbd_smb2_close_do, req);
 287                 return req;
 288         }
 289
 290         status = smbd_smb2_close(smb2req,
 291                                  state->in_fsp,
 292                                  state->in_flags,
 293                                  &state->out_flags,
 294                                  &state->out_creation_ts,
 295                                  &state->out_last_access_ts,
 296                                  &state->out_last_write_ts,
 297                                  &state->out_change_ts,
 298                                  &state->out_allocation_size,
 299                                  &state->out_end_of_file,
 300                                  &state->out_file_attributes);
 301         if (tevent_req_nterror(req, status)) {
 302                 return tevent_req_post(req, ev);
 303         }
 304
 305         tevent_req_done(req);
 306         return tevent_req_post(req, ev);
 307 }
 308
 309 static void smbd_smb2_close_do(struct tevent_req *subreq)
 310 {
 311         struct tevent_req *req = tevent_req_callback_data(
 312                 subreq, struct tevent_req);
 313         struct smbd_smb2_close_state *state = tevent_req_data(
 314                 req, struct smbd_smb2_close_state);
 315         NTSTATUS status;
 316         int ret;
 317
 318         ret = tevent_wait_recv(subreq);
 319         TALLOC_FREE(subreq);
 320         if (ret != 0) {
 321                 DEBUG(10, ("tevent_wait_recv returned %s\n",
 322                            strerror(ret)));
 323                 /*
 324                  * Continue anyway, this should never happen
 325                  */
 326         }
 327
 328         status = smbd_smb2_close(state->smb2req,
 329                                  state->in_fsp,
 330                                  state->in_flags,
 331                                  &state->out_flags,
 332                                  &state->out_creation_ts,
 333                                  &state->out_last_access_ts,
 334                                  &state->out_last_write_ts,
 335                                  &state->out_change_ts,
 336                                  &state->out_allocation_size,
 337                                  &state->out_end_of_file,
 338                                  &state->out_file_attributes);
 339         if (tevent_req_nterror(req, status)) {
 340                 return;
 341         }
 342         tevent_req_done(req);
 343 }
 344
 345 static NTSTATUS smbd_smb2_close_recv(struct tevent_req *req,
 346                                      uint16_t *out_flags,
 347                                      struct timespec *out_creation_ts,
 348                                      struct timespec *out_last_access_ts,
 349                                      struct timespec *out_last_write_ts,
 350                                      struct timespec *out_change_ts,
 351                                      uint64_t *out_allocation_size,
 352                                      uint64_t *out_end_of_file,
 353                                      uint32_t *out_file_attributes)
 354 {
 355         struct smbd_smb2_close_state *state =
 356                 tevent_req_data(req,
 357                 struct smbd_smb2_close_state);
 358         NTSTATUS status;
 359
 360         if (tevent_req_is_nterror(req, &status)) {
 361                 tevent_req_received(req);
 362                 return status;
 363         }
 364
 365         *out_flags = state->out_flags;
 366         *out_creation_ts = state->out_creation_ts;
 367         *out_last_access_ts = state->out_last_access_ts;
 368         *out_last_write_ts = state->out_last_write_ts;
 369         *out_change_ts = state->out_change_ts;
 370         *out_allocation_size = state->out_allocation_size;
 371         *out_end_of_file = state->out_end_of_file;
 372         *out_file_attributes = state->out_file_attributes;
 373
 374         tevent_req_received(req);
 375         return NT_STATUS_OK;
 376 }