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 = 0;
  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 = 0;
  93         uint64_t out_end_of_file = 0;
  94         uint32_t out_file_attributes = 0;
  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->xconn,
 112                                                          nt_errstr(error));
 113                         return;
 114                 }
 115                 return;
 116         }
 117
 118         outbody = smbd_smb2_generate_outbody(req, 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->xconn,
 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->xconn,
 147                                                  nt_errstr(error));
 148                 return;
 149         }
 150 }
 151
 152 static void setup_close_full_information(connection_struct *conn,
 153                                 struct smb_filename *smb_fname,
 154                                 bool posix_open,
 155                                 struct timespec *out_creation_ts,
 156                                 struct timespec *out_last_access_ts,
 157                                 struct timespec *out_last_write_ts,
 158                                 struct timespec *out_change_ts,
 159                                 uint16_t *out_flags,
 160                                 uint64_t *out_allocation_size,
 161                                 uint64_t *out_end_of_file,
 162                                 uint32_t *out_file_attributes)
 163 {
 164         int ret;
 165         if (posix_open) {
 166                 ret = SMB_VFS_LSTAT(conn, smb_fname);
 167         } else {
 168                 ret = SMB_VFS_STAT(conn, smb_fname);
 169         }
 170         if (ret != 0) {
 171                 return;
 172         }
 173
 174         *out_flags = SMB2_CLOSE_FLAGS_FULL_INFORMATION;
 175         *out_file_attributes = dos_mode(conn, smb_fname);
 176         *out_last_write_ts = smb_fname->st.st_ex_mtime;
 177         *out_last_access_ts = smb_fname->st.st_ex_atime;
 178         *out_creation_ts = get_create_timespec(conn, NULL, smb_fname);
 179         *out_change_ts = get_change_timespec(conn, NULL, smb_fname);
 180
 181         if (lp_dos_filetime_resolution(SNUM(conn))) {
 182                 dos_filetime_timespec(out_creation_ts);
 183                 dos_filetime_timespec(out_last_write_ts);
 184                 dos_filetime_timespec(out_last_access_ts);
 185                 dos_filetime_timespec(out_change_ts);
 186         }
 187         if (!(*out_file_attributes & FILE_ATTRIBUTE_DIRECTORY)) {
 188                 *out_end_of_file = get_file_size_stat(&smb_fname->st);
 189         }
 190
 191         *out_allocation_size = SMB_VFS_GET_ALLOC_SIZE(conn, NULL, &smb_fname->st);
 192 }
 193
 194 static NTSTATUS smbd_smb2_close(struct smbd_smb2_request *req,
 195                                 struct files_struct *fsp,
 196                                 uint16_t in_flags,
 197                                 uint16_t *out_flags,
 198                                 struct timespec *out_creation_ts,
 199                                 struct timespec *out_last_access_ts,
 200                                 struct timespec *out_last_write_ts,
 201                                 struct timespec *out_change_ts,
 202                                 uint64_t *out_allocation_size,
 203                                 uint64_t *out_end_of_file,
 204                                 uint32_t *out_file_attributes)
 205 {
 206         NTSTATUS status;
 207         struct smb_request *smbreq;
 208         connection_struct *conn = req->tcon->compat;
 209         struct smb_filename *smb_fname = NULL;
 210         uint64_t allocation_size = 0;
 211         uint64_t file_size = 0;
 212         uint32_t dos_attrs = 0;
 213         uint16_t flags = 0;
 214         bool posix_open = false;
 215
 216         ZERO_STRUCTP(out_creation_ts);
 217         ZERO_STRUCTP(out_last_access_ts);
 218         ZERO_STRUCTP(out_last_write_ts);
 219         ZERO_STRUCTP(out_change_ts);
 220
 221         *out_flags = 0;
 222         *out_allocation_size = 0;
 223         *out_end_of_file = 0;
 224         *out_file_attributes = 0;
 225
 226         DEBUG(10,("smbd_smb2_close: %s - %s\n",
 227                   fsp_str_dbg(fsp), fsp_fnum_dbg(fsp)));
 228
 229         smbreq = smbd_smb2_fake_smb_request(req);
 230         if (smbreq == NULL) {
 231                 return NT_STATUS_NO_MEMORY;
 232         }
 233
 234         posix_open = fsp->posix_open;
 235         smb_fname = cp_smb_filename(talloc_tos(), fsp->fsp_name);
 236         if (smb_fname == NULL) {
 237                 return NT_STATUS_NO_MEMORY;
 238         }
 239
 240         if ((in_flags & SMB2_CLOSE_FLAGS_FULL_INFORMATION) &&
 241             (fsp->initial_delete_on_close || fsp->delete_on_close)) {
 242                 /*
 243                  * We might be deleting the file. Ensure we
 244                  * return valid data from before the file got
 245                  * removed.
 246                  */
 247                 setup_close_full_information(conn,
 248                                 smb_fname,
 249                                 posix_open,
 250                                 out_creation_ts,
 251                                 out_last_access_ts,
 252                                 out_last_write_ts,
 253                                 out_change_ts,
 254                                 &flags,
 255                                 &allocation_size,
 256                                 &file_size,
 257                                 &dos_attrs);
 258         }
 259
 260         status = close_file(smbreq, fsp, NORMAL_CLOSE);
 261         if (!NT_STATUS_IS_OK(status)) {
 262                 DEBUG(5,("smbd_smb2_close: close_file[%s]: %s\n",
 263                          fsp_str_dbg(fsp), nt_errstr(status)));
 264                 return status;
 265         }
 266
 267         if (in_flags & SMB2_CLOSE_FLAGS_FULL_INFORMATION) {
 268                 setup_close_full_information(conn,
 269                                 smb_fname,
 270                                 posix_open,
 271                                 out_creation_ts,
 272                                 out_last_access_ts,
 273                                 out_last_write_ts,
 274                                 out_change_ts,
 275                                 &flags,
 276                                 &allocation_size,
 277                                 &file_size,
 278                                 &dos_attrs);
 279         }
 280
 281         *out_flags = flags;
 282         *out_allocation_size = allocation_size;
 283         *out_end_of_file = file_size;
 284         *out_file_attributes = dos_attrs;
 285
 286         return NT_STATUS_OK;
 287 }
 288
 289 struct smbd_smb2_close_state {
 290         struct smbd_smb2_request *smb2req;
 291         struct files_struct *in_fsp;
 292         uint16_t in_flags;
 293         uint16_t out_flags;
 294         struct timespec out_creation_ts;
 295         struct timespec out_last_access_ts;
 296         struct timespec out_last_write_ts;
 297         struct timespec out_change_ts;
 298         uint64_t out_allocation_size;
 299         uint64_t out_end_of_file;
 300         uint32_t out_file_attributes;
 301 };
 302
 303 static void smbd_smb2_close_do(struct tevent_req *subreq);
 304
 305 static struct tevent_req *smbd_smb2_close_send(TALLOC_CTX *mem_ctx,
 306                                                struct tevent_context *ev,
 307                                                struct smbd_smb2_request *smb2req,
 308                                                struct files_struct *in_fsp,
 309                                                uint16_t in_flags)
 310 {
 311         struct tevent_req *req;
 312         struct smbd_smb2_close_state *state;
 313         NTSTATUS status;
 314
 315         req = tevent_req_create(mem_ctx, &state,
 316                                 struct smbd_smb2_close_state);
 317         if (req == NULL) {
 318                 return NULL;
 319         }
 320         state->smb2req = smb2req;
 321         state->in_fsp = in_fsp;
 322         state->in_flags = in_flags;
 323
 324         if (in_fsp->num_aio_requests != 0) {
 325
 326                 in_fsp->deferred_close = tevent_wait_send(in_fsp, ev);
 327                 if (tevent_req_nomem(in_fsp->deferred_close, req)) {
 328                         return tevent_req_post(req, ev);
 329                 }
 330                 tevent_req_set_callback(in_fsp->deferred_close,
 331                                         smbd_smb2_close_do, req);
 332                 return req;
 333         }
 334
 335         status = smbd_smb2_close(smb2req,
 336                                  state->in_fsp,
 337                                  state->in_flags,
 338                                  &state->out_flags,
 339                                  &state->out_creation_ts,
 340                                  &state->out_last_access_ts,
 341                                  &state->out_last_write_ts,
 342                                  &state->out_change_ts,
 343                                  &state->out_allocation_size,
 344                                  &state->out_end_of_file,
 345                                  &state->out_file_attributes);
 346         if (tevent_req_nterror(req, status)) {
 347                 return tevent_req_post(req, ev);
 348         }
 349
 350         tevent_req_done(req);
 351         return tevent_req_post(req, ev);
 352 }
 353
 354 static void smbd_smb2_close_do(struct tevent_req *subreq)
 355 {
 356         struct tevent_req *req = tevent_req_callback_data(
 357                 subreq, struct tevent_req);
 358         struct smbd_smb2_close_state *state = tevent_req_data(
 359                 req, struct smbd_smb2_close_state);
 360         NTSTATUS status;
 361         int ret;
 362
 363         ret = tevent_wait_recv(subreq);
 364         TALLOC_FREE(subreq);
 365         if (ret != 0) {
 366                 DEBUG(10, ("tevent_wait_recv returned %s\n",
 367                            strerror(ret)));
 368                 /*
 369                  * Continue anyway, this should never happen
 370                  */
 371         }
 372
 373         status = smbd_smb2_close(state->smb2req,
 374                                  state->in_fsp,
 375                                  state->in_flags,
 376                                  &state->out_flags,
 377                                  &state->out_creation_ts,
 378                                  &state->out_last_access_ts,
 379                                  &state->out_last_write_ts,
 380                                  &state->out_change_ts,
 381                                  &state->out_allocation_size,
 382                                  &state->out_end_of_file,
 383                                  &state->out_file_attributes);
 384         if (tevent_req_nterror(req, status)) {
 385                 return;
 386         }
 387         tevent_req_done(req);
 388 }
 389
 390 static NTSTATUS smbd_smb2_close_recv(struct tevent_req *req,
 391                                      uint16_t *out_flags,
 392                                      struct timespec *out_creation_ts,
 393                                      struct timespec *out_last_access_ts,
 394                                      struct timespec *out_last_write_ts,
 395                                      struct timespec *out_change_ts,
 396                                      uint64_t *out_allocation_size,
 397                                      uint64_t *out_end_of_file,
 398                                      uint32_t *out_file_attributes)
 399 {
 400         struct smbd_smb2_close_state *state =
 401                 tevent_req_data(req,
 402                 struct smbd_smb2_close_state);
 403         NTSTATUS status;
 404
 405         if (tevent_req_is_nterror(req, &status)) {
 406                 tevent_req_received(req);
 407                 return status;
 408         }
 409
 410         *out_flags = state->out_flags;
 411         *out_creation_ts = state->out_creation_ts;
 412         *out_last_access_ts = state->out_last_access_ts;
 413         *out_last_write_ts = state->out_last_write_ts;
 414         *out_change_ts = state->out_change_ts;
 415         *out_allocation_size = state->out_allocation_size;
 416         *out_end_of_file = state->out_end_of_file;
 417         *out_file_attributes = state->out_file_attributes;
 418
 419         tevent_req_received(req);
 420         return NT_STATUS_OK;
 421 }