source3/smbd/smb2_setinfo.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Core SMB2 server
   4
   5    Copyright (C) Stefan Metzmacher 2009
   6    Copyright (C) Jeremy Allison 2010
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "smbd/smbd.h"
  24 #include "smbd/globals.h"
  25 #include "../libcli/smb/smb_common.h"
  26 #include "trans2.h"
  27 #include "../lib/util/tevent_ntstatus.h"
  28 #include "../librpc/gen_ndr/open_files.h"
  29 #include "source3/lib/dbwrap/dbwrap_watch.h"
  30 #include "messages.h"
  31
  32 static struct tevent_req *smbd_smb2_setinfo_send(TALLOC_CTX *mem_ctx,
  33                                                  struct tevent_context *ev,
  34                                                  struct smbd_smb2_request *smb2req,
  35                                                  struct files_struct *in_fsp,
  36                                                  uint8_t in_info_type,
  37                                                  uint8_t in_file_info_class,
  38                                                  DATA_BLOB in_input_buffer,
  39                                                  uint32_t in_additional_information);
  40 static NTSTATUS smbd_smb2_setinfo_recv(struct tevent_req *req);
  41
  42 static void smbd_smb2_request_setinfo_done(struct tevent_req *subreq);
  43 NTSTATUS smbd_smb2_request_process_setinfo(struct smbd_smb2_request *req)
  44 {
  45         struct smbXsrv_connection *xconn = req->xconn;
  46         NTSTATUS status;
  47         const uint8_t *inbody;
  48         uint8_t in_info_type;
  49         uint8_t in_file_info_class;
  50         uint16_t in_input_buffer_offset;
  51         uint32_t in_input_buffer_length;
  52         DATA_BLOB in_input_buffer;
  53         uint32_t in_additional_information;
  54         uint64_t in_file_id_persistent;
  55         uint64_t in_file_id_volatile;
  56         struct files_struct *in_fsp;
  57         struct tevent_req *subreq;
  58
  59         status = smbd_smb2_request_verify_sizes(req, 0x21);
  60         if (!NT_STATUS_IS_OK(status)) {
  61                 return smbd_smb2_request_error(req, status);
  62         }
  63         inbody = SMBD_SMB2_IN_BODY_PTR(req);
  64
  65         in_info_type                    = CVAL(inbody, 0x02);
  66         in_file_info_class              = CVAL(inbody, 0x03);
  67         in_input_buffer_length          = IVAL(inbody, 0x04);
  68         in_input_buffer_offset          = SVAL(inbody, 0x08);
  69         /* 0x0A 2 bytes reserved */
  70         in_additional_information       = IVAL(inbody, 0x0C);
  71         in_file_id_persistent           = BVAL(inbody, 0x10);
  72         in_file_id_volatile             = BVAL(inbody, 0x18);
  73
  74         if (in_input_buffer_offset == 0 && in_input_buffer_length == 0) {
  75                 /* This is ok */
  76         } else if (in_input_buffer_offset !=
  77                    (SMB2_HDR_BODY + SMBD_SMB2_IN_BODY_LEN(req))) {
  78                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  79         }
  80
  81         if (in_input_buffer_length > SMBD_SMB2_IN_DYN_LEN(req)) {
  82                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  83         }
  84
  85         in_input_buffer.data = SMBD_SMB2_IN_DYN_PTR(req);
  86         in_input_buffer.length = in_input_buffer_length;
  87
  88         if (in_input_buffer.length > xconn->smb2.server.max_trans) {
  89                 DEBUG(2,("smbd_smb2_request_process_setinfo: "
  90                          "client ignored max trans: %s: 0x%08X: 0x%08X\n",
  91                          __location__, (unsigned)in_input_buffer.length,
  92                          (unsigned)xconn->smb2.server.max_trans));
  93                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  94         }
  95
  96         status = smbd_smb2_request_verify_creditcharge(req,
  97                                                 in_input_buffer.length);
  98         if (!NT_STATUS_IS_OK(status)) {
  99                 return smbd_smb2_request_error(req, status);
 100         }
 101
 102         in_fsp = file_fsp_smb2(req, in_file_id_persistent, in_file_id_volatile);
 103         if (in_fsp == NULL) {
 104                 return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
 105         }
 106
 107         subreq = smbd_smb2_setinfo_send(req, req->sconn->ev_ctx,
 108                                         req, in_fsp,
 109                                         in_info_type,
 110                                         in_file_info_class,
 111                                         in_input_buffer,
 112                                         in_additional_information);
 113         if (subreq == NULL) {
 114                 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 115         }
 116         tevent_req_set_callback(subreq, smbd_smb2_request_setinfo_done, req);
 117
 118         return smbd_smb2_request_pending_queue(req, subreq, 500);
 119 }
 120
 121 static void smbd_smb2_request_setinfo_done(struct tevent_req *subreq)
 122 {
 123         struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
 124                                         struct smbd_smb2_request);
 125         DATA_BLOB outbody;
 126         NTSTATUS status;
 127         NTSTATUS error; /* transport error */
 128
 129         status = smbd_smb2_setinfo_recv(subreq);
 130         TALLOC_FREE(subreq);
 131         if (!NT_STATUS_IS_OK(status)) {
 132                 error = smbd_smb2_request_error(req, status);
 133                 if (!NT_STATUS_IS_OK(error)) {
 134                         smbd_server_connection_terminate(req->xconn,
 135                                                          nt_errstr(error));
 136                         return;
 137                 }
 138                 return;
 139         }
 140
 141         outbody = smbd_smb2_generate_outbody(req, 0x02);
 142         if (outbody.data == NULL) {
 143                 error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 144                 if (!NT_STATUS_IS_OK(error)) {
 145                         smbd_server_connection_terminate(req->xconn,
 146                                                          nt_errstr(error));
 147                         return;
 148                 }
 149                 return;
 150         }
 151
 152         SSVAL(outbody.data, 0x00, 0x02);        /* struct size */
 153
 154         error = smbd_smb2_request_done(req, outbody, NULL);
 155         if (!NT_STATUS_IS_OK(error)) {
 156                 smbd_server_connection_terminate(req->xconn,
 157                                                  nt_errstr(error));
 158                 return;
 159         }
 160 }
 161
 162 struct defer_rename_state {
 163         struct tevent_req *req;
 164         struct smbd_smb2_request *smb2req;
 165         struct tevent_context *ev;
 166         struct files_struct *fsp;
 167         char *data;
 168         int data_size;
 169 };
 170
 171 static void defer_rename_done(struct tevent_req *subreq);
 172
 173 static struct tevent_req *delay_rename_for_lease_break(struct tevent_req *req,
 174                                 struct smbd_smb2_request *smb2req,
 175                                 struct tevent_context *ev,
 176                                 struct files_struct *fsp,
 177                                 struct share_mode_lock *lck,
 178                                 char *data,
 179                                 int data_size)
 180
 181 {
 182         struct tevent_req *subreq;
 183         uint32_t i;
 184         struct share_mode_data *d = lck->data;
 185         struct defer_rename_state *rename_state;
 186         bool delay = false;
 187         struct timeval timeout;
 188
 189         if (fsp->oplock_type != LEASE_OPLOCK) {
 190                 return NULL;
 191         }
 192
 193         for (i=0; i<d->num_share_modes; i++) {
 194                 struct share_mode_entry *e = &d->share_modes[i];
 195                 struct share_mode_lease *l = NULL;
 196                 uint32_t e_lease_type = get_lease_type(d, e);
 197                 uint32_t break_to;
 198
 199                 if (e->op_type != LEASE_OPLOCK) {
 200                         continue;
 201                 }
 202
 203                 l = &d->leases[e->lease_idx];
 204
 205                 if (smb2_lease_equal(fsp_client_guid(fsp),
 206                                 &fsp->lease->lease.lease_key,
 207                                 &l->client_guid,
 208                                 &l->lease_key)) {
 209                         continue;
 210                 }
 211
 212                 if (share_mode_stale_pid(d, i)) {
 213                         continue;
 214                 }
 215
 216                 if (!(e_lease_type & SMB2_LEASE_HANDLE)) {
 217                         continue;
 218                 }
 219
 220                 delay = true;
 221                 break_to = (e_lease_type & ~SMB2_LEASE_HANDLE);
 222
 223                 send_break_message(fsp->conn->sconn->msg_ctx, e, break_to);
 224         }
 225
 226         if (!delay) {
 227                 return NULL;
 228         }
 229
 230         /* Setup a watch on this record. */
 231         rename_state = talloc_zero(req, struct defer_rename_state);
 232         if (rename_state == NULL) {
 233                 return NULL;
 234         }
 235
 236         rename_state->req = req;
 237         rename_state->smb2req = smb2req;
 238         rename_state->ev = ev;
 239         rename_state->fsp = fsp;
 240         rename_state->data = data;
 241         rename_state->data_size = data_size;
 242
 243         subreq = dbwrap_record_watch_send(
 244                                 rename_state,
 245                                 ev,
 246                                 lck->data->record,
 247                                 fsp->conn->sconn->msg_ctx);
 248
 249         if (subreq == NULL) {
 250                 exit_server("Could not watch share mode record for rename\n");
 251         }
 252
 253         tevent_req_set_callback(subreq, defer_rename_done, rename_state);
 254
 255         timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
 256         if (!tevent_req_set_endtime(subreq,
 257                         ev,
 258                         timeval_sum(&smb2req->request_time, &timeout))) {
 259                 exit_server("Could not set rename timeout\n");
 260         }
 261
 262         return subreq;
 263 }
 264
 265 static void defer_rename_done(struct tevent_req *subreq)
 266 {
 267         struct defer_rename_state *state = tevent_req_callback_data(
 268                 subreq, struct defer_rename_state);
 269         NTSTATUS status;
 270         struct share_mode_lock *lck;
 271         int ret_size = 0;
 272         bool ok;
 273
 274         status = dbwrap_record_watch_recv(subreq, state->req, NULL);
 275         TALLOC_FREE(subreq);
 276         if (!NT_STATUS_IS_OK(status)) {
 277                 DEBUG(5, ("dbwrap_record_watch_recv returned %s\n",
 278                         nt_errstr(status)));
 279                 tevent_req_nterror(state->req, status);
 280                 return;
 281         }
 282
 283         /*
 284          * Make sure we run as the user again
 285          */
 286         ok = change_to_user(state->smb2req->tcon->compat,
 287                             state->smb2req->session->compat->vuid);
 288         if (!ok) {
 289                 tevent_req_nterror(state->req, NT_STATUS_ACCESS_DENIED);
 290                 return;
 291         }
 292
 293         /* should we pass FLAG_CASELESS_PATHNAMES here? */
 294         ok = set_current_service(state->smb2req->tcon->compat, 0, true);
 295         if (!ok) {
 296                 tevent_req_nterror(state->req, NT_STATUS_ACCESS_DENIED);
 297                 return;
 298         }
 299
 300         /* Do we still need to wait ? */
 301         lck = get_existing_share_mode_lock(state->req, state->fsp->file_id);
 302         if (lck == NULL) {
 303                 tevent_req_nterror(state->req, NT_STATUS_UNSUCCESSFUL);
 304                 return;
 305         }
 306         subreq = delay_rename_for_lease_break(state->req,
 307                                 state->smb2req,
 308                                 state->ev,
 309                                 state->fsp,
 310                                 lck,
 311                                 state->data,
 312                                 state->data_size);
 313         if (subreq) {
 314                 /* Yep - keep waiting. */
 315                 TALLOC_FREE(state);
 316                 TALLOC_FREE(lck);
 317                 return;
 318         }
 319
 320         /* Do the rename under the lock. */
 321         status = smbd_do_setfilepathinfo(state->fsp->conn,
 322                                 state->smb2req->smb1req,
 323                                 state,
 324                                 SMB2_FILE_RENAME_INFORMATION_INTERNAL,
 325                                 state->fsp,
 326                                 state->fsp->fsp_name,
 327                                 &state->data,
 328                                 state->data_size,
 329                                 &ret_size);
 330
 331         TALLOC_FREE(lck);
 332         SAFE_FREE(state->data);
 333
 334         if (!NT_STATUS_IS_OK(status)) {
 335                 tevent_req_nterror(state->req, status);
 336                 return;
 337         }
 338
 339         tevent_req_done(state->req);
 340 }
 341
 342 struct smbd_smb2_setinfo_state {
 343         struct smbd_smb2_request *smb2req;
 344 };
 345
 346 static struct tevent_req *smbd_smb2_setinfo_send(TALLOC_CTX *mem_ctx,
 347                                                  struct tevent_context *ev,
 348                                                  struct smbd_smb2_request *smb2req,
 349                                                  struct files_struct *fsp,
 350                                                  uint8_t in_info_type,
 351                                                  uint8_t in_file_info_class,
 352                                                  DATA_BLOB in_input_buffer,
 353                                                  uint32_t in_additional_information)
 354 {
 355         struct tevent_req *req = NULL;
 356         struct smbd_smb2_setinfo_state *state = NULL;
 357         struct smb_request *smbreq = NULL;
 358         connection_struct *conn = smb2req->tcon->compat;
 359         struct share_mode_lock *lck = NULL;
 360         NTSTATUS status;
 361
 362         req = tevent_req_create(mem_ctx, &state,
 363                                 struct smbd_smb2_setinfo_state);
 364         if (req == NULL) {
 365                 return NULL;
 366         }
 367         state->smb2req = smb2req;
 368
 369         DEBUG(10,("smbd_smb2_setinfo_send: %s - %s\n",
 370                   fsp_str_dbg(fsp), fsp_fnum_dbg(fsp)));
 371
 372         smbreq = smbd_smb2_fake_smb_request(smb2req);
 373         if (tevent_req_nomem(smbreq, req)) {
 374                 return tevent_req_post(req, ev);
 375         }
 376
 377         if (IS_IPC(conn)) {
 378                 tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
 379                 return tevent_req_post(req, ev);
 380         }
 381
 382         switch (in_info_type) {
 383         case 0x01:/* SMB2_SETINFO_FILE */
 384         {
 385                 uint16_t file_info_level;
 386                 char *data;
 387                 int data_size;
 388                 int ret_size = 0;
 389
 390
 391                 file_info_level = in_file_info_class + 1000;
 392                 if (file_info_level == SMB_FILE_RENAME_INFORMATION) {
 393                         /* SMB2_FILE_RENAME_INFORMATION_INTERNAL == 0xFF00 + in_file_info_class */
 394                         file_info_level = SMB2_FILE_RENAME_INFORMATION_INTERNAL;
 395                 }
 396
 397                 if (fsp->fh->fd == -1) {
 398                         /*
 399                          * This is actually a SETFILEINFO on a directory
 400                          * handle (returned from an NT SMB). NT5.0 seems
 401                          * to do this call. JRA.
 402                          */
 403                         if (INFO_LEVEL_IS_UNIX(file_info_level)) {
 404                                 /* Always do lstat for UNIX calls. */
 405                                 if (SMB_VFS_LSTAT(conn, fsp->fsp_name)) {
 406                                         DEBUG(3,("smbd_smb2_setinfo_send: "
 407                                                  "SMB_VFS_LSTAT of %s failed "
 408                                                  "(%s)\n", fsp_str_dbg(fsp),
 409                                                  strerror(errno)));
 410                                         status = map_nt_error_from_unix(errno);
 411                                         tevent_req_nterror(req, status);
 412                                         return tevent_req_post(req, ev);
 413                                 }
 414                         } else {
 415                                 if (SMB_VFS_STAT(conn, fsp->fsp_name) != 0) {
 416                                         DEBUG(3,("smbd_smb2_setinfo_send: "
 417                                                  "fileinfo of %s failed (%s)\n",
 418                                                  fsp_str_dbg(fsp),
 419                                                  strerror(errno)));
 420                                         status = map_nt_error_from_unix(errno);
 421                                         tevent_req_nterror(req, status);
 422                                         return tevent_req_post(req, ev);
 423                                 }
 424                         }
 425                 } else if (fsp->print_file) {
 426                         /*
 427                          * Doing a DELETE_ON_CLOSE should cancel a print job.
 428                          */
 429                         if ((file_info_level == SMB_SET_FILE_DISPOSITION_INFO)
 430                             && in_input_buffer.length >= 1
 431                             && CVAL(in_input_buffer.data,0)) {
 432                                 fsp->fh->private_options |= NTCREATEX_OPTIONS_PRIVATE_DELETE_ON_CLOSE;
 433
 434                                 DEBUG(3,("smbd_smb2_setinfo_send: "
 435                                          "Cancelling print job (%s)\n",
 436                                          fsp_str_dbg(fsp)));
 437
 438                                 tevent_req_done(req);
 439                                 return tevent_req_post(req, ev);
 440                         } else {
 441                                 tevent_req_nterror(req,
 442                                         NT_STATUS_OBJECT_PATH_INVALID);
 443                                 return tevent_req_post(req, ev);
 444                         }
 445                 } else {
 446                         /*
 447                          * Original code - this is an open file.
 448                          */
 449
 450                         if (SMB_VFS_FSTAT(fsp, &fsp->fsp_name->st) != 0) {
 451                                 DEBUG(3,("smbd_smb2_setinfo_send: fstat "
 452                                          "of %s failed (%s)\n",
 453                                          fsp_fnum_dbg(fsp),
 454                                          strerror(errno)));
 455                                 status = map_nt_error_from_unix(errno);
 456                                 tevent_req_nterror(req, status);
 457                                 return tevent_req_post(req, ev);
 458                         }
 459                 }
 460
 461                 data = NULL;
 462                 data_size = in_input_buffer.length;
 463                 if (data_size > 0) {
 464                         data = (char *)SMB_MALLOC_ARRAY(char, data_size);
 465                         if (tevent_req_nomem(data, req)) {
 466                                 return tevent_req_post(req, ev);
 467                         }
 468                         memcpy(data, in_input_buffer.data, data_size);
 469                 }
 470
 471                 if (file_info_level == SMB2_FILE_RENAME_INFORMATION_INTERNAL) {
 472                         struct tevent_req *subreq;
 473
 474                         lck = get_existing_share_mode_lock(mem_ctx,
 475                                                         fsp->file_id);
 476                         if (lck == NULL) {
 477                                 tevent_req_nterror(req,
 478                                         NT_STATUS_UNSUCCESSFUL);
 479                                 return tevent_req_post(req, ev);
 480                         }
 481
 482                         subreq = delay_rename_for_lease_break(req,
 483                                                         smb2req,
 484                                                         ev,
 485                                                         fsp,
 486                                                         lck,
 487                                                         data,
 488                                                         data_size);
 489                         if (subreq) {
 490                                 /* Wait for lease break response. */
 491
 492                                 /* Ensure we can't be closed in flight. */
 493                                 if (!aio_add_req_to_fsp(fsp, req)) {
 494                                         TALLOC_FREE(lck);
 495                                         tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
 496                                         return tevent_req_post(req, ev);
 497                                 }
 498
 499                                 TALLOC_FREE(lck);
 500                                 return req;
 501                         }
 502                 }
 503
 504                 status = smbd_do_setfilepathinfo(conn, smbreq, state,
 505                                                  file_info_level,
 506                                                  fsp,
 507                                                  fsp->fsp_name,
 508                                                  &data,
 509                                                  data_size,
 510                                                  &ret_size);
 511                 TALLOC_FREE(lck);
 512                 SAFE_FREE(data);
 513                 if (!NT_STATUS_IS_OK(status)) {
 514                         if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_LEVEL)) {
 515                                 status = NT_STATUS_INVALID_INFO_CLASS;
 516                         }
 517                         tevent_req_nterror(req, status);
 518                         return tevent_req_post(req, ev);
 519                 }
 520                 break;
 521         }
 522
 523         case 0x03:/* SMB2_SETINFO_SECURITY */
 524         {
 525                 if (!CAN_WRITE(conn)) {
 526                         tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
 527                         return tevent_req_post(req, ev);
 528                 }
 529
 530                 status = set_sd_blob(fsp,
 531                                 in_input_buffer.data,
 532                                 in_input_buffer.length,
 533                                 in_additional_information &
 534                                 SMB_SUPPORTED_SECINFO_FLAGS);
 535                 if (!NT_STATUS_IS_OK(status)) {
 536                         tevent_req_nterror(req, status);
 537                         return tevent_req_post(req, ev);
 538                 }
 539                 break;
 540         }
 541
 542         default:
 543                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 544                 return tevent_req_post(req, ev);
 545         }
 546
 547         tevent_req_done(req);
 548         return tevent_req_post(req, ev);
 549 }
 550
 551 static NTSTATUS smbd_smb2_setinfo_recv(struct tevent_req *req)
 552 {
 553         NTSTATUS status;
 554
 555         if (tevent_req_is_nterror(req, &status)) {
 556                 tevent_req_received(req);
 557                 return status;
 558         }
 559
 560         tevent_req_received(req);
 561         return NT_STATUS_OK;
 562 }