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 int defer_rename_state_destructor(struct defer_rename_state *rename_state)
 172 {
 173         SAFE_FREE(rename_state->data);
 174         return 0;
 175 }
 176
 177 static void defer_rename_done(struct tevent_req *subreq);
 178
 179 static struct tevent_req *delay_rename_for_lease_break(struct tevent_req *req,
 180                                 struct smbd_smb2_request *smb2req,
 181                                 struct tevent_context *ev,
 182                                 struct files_struct *fsp,
 183                                 struct share_mode_lock *lck,
 184                                 char *data,
 185                                 int data_size)
 186
 187 {
 188         struct tevent_req *subreq;
 189         uint32_t i;
 190         struct share_mode_data *d = lck->data;
 191         struct defer_rename_state *rename_state;
 192         bool delay = false;
 193         struct timeval timeout;
 194
 195         if (fsp->oplock_type != LEASE_OPLOCK) {
 196                 return NULL;
 197         }
 198
 199         for (i=0; i<d->num_share_modes; i++) {
 200                 struct share_mode_entry *e = &d->share_modes[i];
 201                 struct share_mode_lease *l = NULL;
 202                 uint32_t e_lease_type = get_lease_type(d, e);
 203                 uint32_t break_to;
 204
 205                 if (e->op_type != LEASE_OPLOCK) {
 206                         continue;
 207                 }
 208
 209                 l = &d->leases[e->lease_idx];
 210
 211                 if (smb2_lease_equal(fsp_client_guid(fsp),
 212                                 &fsp->lease->lease.lease_key,
 213                                 &l->client_guid,
 214                                 &l->lease_key)) {
 215                         continue;
 216                 }
 217
 218                 if (share_mode_stale_pid(d, i)) {
 219                         continue;
 220                 }
 221
 222                 if (!(e_lease_type & SMB2_LEASE_HANDLE)) {
 223                         continue;
 224                 }
 225
 226                 delay = true;
 227                 break_to = (e_lease_type & ~SMB2_LEASE_HANDLE);
 228
 229                 send_break_message(fsp->conn->sconn->msg_ctx, e, break_to);
 230         }
 231
 232         if (!delay) {
 233                 return NULL;
 234         }
 235
 236         /* Setup a watch on this record. */
 237         rename_state = talloc_zero(req, struct defer_rename_state);
 238         if (rename_state == NULL) {
 239                 return NULL;
 240         }
 241
 242         rename_state->req = req;
 243         rename_state->smb2req = smb2req;
 244         rename_state->ev = ev;
 245         rename_state->fsp = fsp;
 246         rename_state->data = data;
 247         rename_state->data_size = data_size;
 248
 249         talloc_set_destructor(rename_state, defer_rename_state_destructor);
 250
 251         subreq = dbwrap_record_watch_send(
 252                                 rename_state,
 253                                 ev,
 254                                 lck->data->record,
 255                                 fsp->conn->sconn->msg_ctx);
 256
 257         if (subreq == NULL) {
 258                 exit_server("Could not watch share mode record for rename\n");
 259         }
 260
 261         tevent_req_set_callback(subreq, defer_rename_done, rename_state);
 262
 263         timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
 264         if (!tevent_req_set_endtime(subreq,
 265                         ev,
 266                         timeval_sum(&smb2req->request_time, &timeout))) {
 267                 exit_server("Could not set rename timeout\n");
 268         }
 269
 270         return subreq;
 271 }
 272
 273 static void defer_rename_done(struct tevent_req *subreq)
 274 {
 275         struct defer_rename_state *state = tevent_req_callback_data(
 276                 subreq, struct defer_rename_state);
 277         NTSTATUS status;
 278         struct share_mode_lock *lck;
 279         int ret_size = 0;
 280         bool ok;
 281
 282         status = dbwrap_record_watch_recv(subreq, state->req, NULL);
 283         TALLOC_FREE(subreq);
 284         if (!NT_STATUS_IS_OK(status)) {
 285                 DEBUG(5, ("dbwrap_record_watch_recv returned %s\n",
 286                         nt_errstr(status)));
 287                 tevent_req_nterror(state->req, status);
 288                 return;
 289         }
 290
 291         /*
 292          * Make sure we run as the user again
 293          */
 294         ok = change_to_user(state->smb2req->tcon->compat,
 295                             state->smb2req->session->compat->vuid);
 296         if (!ok) {
 297                 tevent_req_nterror(state->req, NT_STATUS_ACCESS_DENIED);
 298                 return;
 299         }
 300
 301         /* should we pass FLAG_CASELESS_PATHNAMES here? */
 302         ok = set_current_service(state->smb2req->tcon->compat, 0, true);
 303         if (!ok) {
 304                 tevent_req_nterror(state->req, NT_STATUS_ACCESS_DENIED);
 305                 return;
 306         }
 307
 308         /* Do we still need to wait ? */
 309         lck = get_existing_share_mode_lock(state->req, state->fsp->file_id);
 310         if (lck == NULL) {
 311                 tevent_req_nterror(state->req, NT_STATUS_UNSUCCESSFUL);
 312                 return;
 313         }
 314         subreq = delay_rename_for_lease_break(state->req,
 315                                 state->smb2req,
 316                                 state->ev,
 317                                 state->fsp,
 318                                 lck,
 319                                 state->data,
 320                                 state->data_size);
 321         if (subreq) {
 322                 /* Yep - keep waiting. */
 323                 state->data = NULL;
 324                 TALLOC_FREE(state);
 325                 TALLOC_FREE(lck);
 326                 return;
 327         }
 328
 329         /* Do the rename under the lock. */
 330         status = smbd_do_setfilepathinfo(state->fsp->conn,
 331                                 state->smb2req->smb1req,
 332                                 state,
 333                                 SMB2_FILE_RENAME_INFORMATION_INTERNAL,
 334                                 state->fsp,
 335                                 state->fsp->fsp_name,
 336                                 &state->data,
 337                                 state->data_size,
 338                                 &ret_size);
 339
 340         TALLOC_FREE(lck);
 341         SAFE_FREE(state->data);
 342
 343         if (!NT_STATUS_IS_OK(status)) {
 344                 tevent_req_nterror(state->req, status);
 345                 return;
 346         }
 347
 348         tevent_req_done(state->req);
 349 }
 350
 351 struct smbd_smb2_setinfo_state {
 352         struct smbd_smb2_request *smb2req;
 353 };
 354
 355 static struct tevent_req *smbd_smb2_setinfo_send(TALLOC_CTX *mem_ctx,
 356                                                  struct tevent_context *ev,
 357                                                  struct smbd_smb2_request *smb2req,
 358                                                  struct files_struct *fsp,
 359                                                  uint8_t in_info_type,
 360                                                  uint8_t in_file_info_class,
 361                                                  DATA_BLOB in_input_buffer,
 362                                                  uint32_t in_additional_information)
 363 {
 364         struct tevent_req *req = NULL;
 365         struct smbd_smb2_setinfo_state *state = NULL;
 366         struct smb_request *smbreq = NULL;
 367         connection_struct *conn = smb2req->tcon->compat;
 368         struct share_mode_lock *lck = NULL;
 369         NTSTATUS status;
 370
 371         req = tevent_req_create(mem_ctx, &state,
 372                                 struct smbd_smb2_setinfo_state);
 373         if (req == NULL) {
 374                 return NULL;
 375         }
 376         state->smb2req = smb2req;
 377
 378         DEBUG(10,("smbd_smb2_setinfo_send: %s - %s\n",
 379                   fsp_str_dbg(fsp), fsp_fnum_dbg(fsp)));
 380
 381         smbreq = smbd_smb2_fake_smb_request(smb2req);
 382         if (tevent_req_nomem(smbreq, req)) {
 383                 return tevent_req_post(req, ev);
 384         }
 385
 386         if (IS_IPC(conn)) {
 387                 tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
 388                 return tevent_req_post(req, ev);
 389         }
 390
 391         switch (in_info_type) {
 392         case 0x01:/* SMB2_SETINFO_FILE */
 393         {
 394                 uint16_t file_info_level;
 395                 char *data;
 396                 int data_size;
 397                 int ret_size = 0;
 398
 399
 400                 file_info_level = in_file_info_class + 1000;
 401                 if (file_info_level == SMB_FILE_RENAME_INFORMATION) {
 402                         /* SMB2_FILE_RENAME_INFORMATION_INTERNAL == 0xFF00 + in_file_info_class */
 403                         file_info_level = SMB2_FILE_RENAME_INFORMATION_INTERNAL;
 404                 }
 405
 406                 if (fsp->fh->fd == -1) {
 407                         /*
 408                          * This is actually a SETFILEINFO on a directory
 409                          * handle (returned from an NT SMB). NT5.0 seems
 410                          * to do this call. JRA.
 411                          */
 412                         if (INFO_LEVEL_IS_UNIX(file_info_level)) {
 413                                 /* Always do lstat for UNIX calls. */
 414                                 if (SMB_VFS_LSTAT(conn, fsp->fsp_name)) {
 415                                         DEBUG(3,("smbd_smb2_setinfo_send: "
 416                                                  "SMB_VFS_LSTAT of %s failed "
 417                                                  "(%s)\n", fsp_str_dbg(fsp),
 418                                                  strerror(errno)));
 419                                         status = map_nt_error_from_unix(errno);
 420                                         tevent_req_nterror(req, status);
 421                                         return tevent_req_post(req, ev);
 422                                 }
 423                         } else {
 424                                 if (SMB_VFS_STAT(conn, fsp->fsp_name) != 0) {
 425                                         DEBUG(3,("smbd_smb2_setinfo_send: "
 426                                                  "fileinfo of %s failed (%s)\n",
 427                                                  fsp_str_dbg(fsp),
 428                                                  strerror(errno)));
 429                                         status = map_nt_error_from_unix(errno);
 430                                         tevent_req_nterror(req, status);
 431                                         return tevent_req_post(req, ev);
 432                                 }
 433                         }
 434                 } else if (fsp->print_file) {
 435                         /*
 436                          * Doing a DELETE_ON_CLOSE should cancel a print job.
 437                          */
 438                         if ((file_info_level == SMB_SET_FILE_DISPOSITION_INFO)
 439                             && in_input_buffer.length >= 1
 440                             && CVAL(in_input_buffer.data,0)) {
 441                                 fsp->fh->private_options |= NTCREATEX_OPTIONS_PRIVATE_DELETE_ON_CLOSE;
 442
 443                                 DEBUG(3,("smbd_smb2_setinfo_send: "
 444                                          "Cancelling print job (%s)\n",
 445                                          fsp_str_dbg(fsp)));
 446
 447                                 tevent_req_done(req);
 448                                 return tevent_req_post(req, ev);
 449                         } else {
 450                                 tevent_req_nterror(req,
 451                                         NT_STATUS_OBJECT_PATH_INVALID);
 452                                 return tevent_req_post(req, ev);
 453                         }
 454                 } else {
 455                         /*
 456                          * Original code - this is an open file.
 457                          */
 458
 459                         if (SMB_VFS_FSTAT(fsp, &fsp->fsp_name->st) != 0) {
 460                                 DEBUG(3,("smbd_smb2_setinfo_send: fstat "
 461                                          "of %s failed (%s)\n",
 462                                          fsp_fnum_dbg(fsp),
 463                                          strerror(errno)));
 464                                 status = map_nt_error_from_unix(errno);
 465                                 tevent_req_nterror(req, status);
 466                                 return tevent_req_post(req, ev);
 467                         }
 468                 }
 469
 470                 data = NULL;
 471                 data_size = in_input_buffer.length;
 472                 if (data_size > 0) {
 473                         data = (char *)SMB_MALLOC_ARRAY(char, data_size);
 474                         if (tevent_req_nomem(data, req)) {
 475                                 return tevent_req_post(req, ev);
 476                         }
 477                         memcpy(data, in_input_buffer.data, data_size);
 478                 }
 479
 480                 if (file_info_level == SMB2_FILE_RENAME_INFORMATION_INTERNAL) {
 481                         struct tevent_req *subreq;
 482
 483                         lck = get_existing_share_mode_lock(mem_ctx,
 484                                                         fsp->file_id);
 485                         if (lck == NULL) {
 486                                 SAFE_FREE(data);
 487                                 tevent_req_nterror(req,
 488                                         NT_STATUS_UNSUCCESSFUL);
 489                                 return tevent_req_post(req, ev);
 490                         }
 491
 492                         subreq = delay_rename_for_lease_break(req,
 493                                                         smb2req,
 494                                                         ev,
 495                                                         fsp,
 496                                                         lck,
 497                                                         data,
 498                                                         data_size);
 499                         if (subreq) {
 500                                 /* Wait for lease break response. */
 501
 502                                 /* Ensure we can't be closed in flight. */
 503                                 if (!aio_add_req_to_fsp(fsp, req)) {
 504                                         TALLOC_FREE(lck);
 505                                         tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
 506                                         return tevent_req_post(req, ev);
 507                                 }
 508
 509                                 TALLOC_FREE(lck);
 510                                 return req;
 511                         }
 512                 }
 513
 514                 status = smbd_do_setfilepathinfo(conn, smbreq, state,
 515                                                  file_info_level,
 516                                                  fsp,
 517                                                  fsp->fsp_name,
 518                                                  &data,
 519                                                  data_size,
 520                                                  &ret_size);
 521                 TALLOC_FREE(lck);
 522                 SAFE_FREE(data);
 523                 if (!NT_STATUS_IS_OK(status)) {
 524                         if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_LEVEL)) {
 525                                 status = NT_STATUS_INVALID_INFO_CLASS;
 526                         }
 527                         tevent_req_nterror(req, status);
 528                         return tevent_req_post(req, ev);
 529                 }
 530                 break;
 531         }
 532
 533         case 0x03:/* SMB2_SETINFO_SECURITY */
 534         {
 535                 if (!CAN_WRITE(conn)) {
 536                         tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
 537                         return tevent_req_post(req, ev);
 538                 }
 539
 540                 status = set_sd_blob(fsp,
 541                                 in_input_buffer.data,
 542                                 in_input_buffer.length,
 543                                 in_additional_information &
 544                                 SMB_SUPPORTED_SECINFO_FLAGS);
 545                 if (!NT_STATUS_IS_OK(status)) {
 546                         tevent_req_nterror(req, status);
 547                         return tevent_req_post(req, ev);
 548                 }
 549                 break;
 550         }
 551
 552         default:
 553                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 554                 return tevent_req_post(req, ev);
 555         }
 556
 557         tevent_req_done(req);
 558         return tevent_req_post(req, ev);
 559 }
 560
 561 static NTSTATUS smbd_smb2_setinfo_recv(struct tevent_req *req)
 562 {
 563         NTSTATUS status;
 564
 565         if (tevent_req_is_nterror(req, &status)) {
 566                 tevent_req_received(req);
 567                 return status;
 568         }
 569
 570         tevent_req_received(req);
 571         return NT_STATUS_OK;
 572 }