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 "locking/share_mode_lock.h"
  24 #include "smbd/smbd.h"
  25 #include "smbd/globals.h"
  26 #include "../libcli/smb/smb_common.h"
  27 #include "trans2.h"
  28 #include "../lib/util/tevent_ntstatus.h"
  29 #include "../librpc/gen_ndr/open_files.h"
  30 #include "source3/lib/dbwrap/dbwrap_watch.h"
  31 #include "messages.h"
  32 #include "librpc/gen_ndr/ndr_quota.h"
  33
  34 #undef DBGC_CLASS
  35 #define DBGC_CLASS DBGC_SMB2
  36
  37 static struct tevent_req *smbd_smb2_setinfo_send(TALLOC_CTX *mem_ctx,
  38                                                  struct tevent_context *ev,
  39                                                  struct smbd_smb2_request *smb2req,
  40                                                  struct files_struct *in_fsp,
  41                                                  uint8_t in_info_type,
  42                                                  uint8_t in_file_info_class,
  43                                                  DATA_BLOB in_input_buffer,
  44                                                  uint32_t in_additional_information);
  45 static NTSTATUS smbd_smb2_setinfo_recv(struct tevent_req *req);
  46
  47 static void smbd_smb2_request_setinfo_done(struct tevent_req *subreq);
  48 NTSTATUS smbd_smb2_request_process_setinfo(struct smbd_smb2_request *req)
  49 {
  50         struct smbXsrv_connection *xconn = req->xconn;
  51         NTSTATUS status;
  52         const uint8_t *inbody;
  53         uint8_t in_info_type;
  54         uint8_t in_file_info_class;
  55         uint16_t in_input_buffer_offset;
  56         uint32_t in_input_buffer_length;
  57         DATA_BLOB in_input_buffer;
  58         uint32_t in_additional_information;
  59         uint64_t in_file_id_persistent;
  60         uint64_t in_file_id_volatile;
  61         struct files_struct *in_fsp;
  62         struct tevent_req *subreq;
  63
  64         status = smbd_smb2_request_verify_sizes(req, 0x21);
  65         if (!NT_STATUS_IS_OK(status)) {
  66                 return smbd_smb2_request_error(req, status);
  67         }
  68         inbody = SMBD_SMB2_IN_BODY_PTR(req);
  69
  70         in_info_type                    = CVAL(inbody, 0x02);
  71         in_file_info_class              = CVAL(inbody, 0x03);
  72         in_input_buffer_length          = IVAL(inbody, 0x04);
  73         in_input_buffer_offset          = SVAL(inbody, 0x08);
  74         /* 0x0A 2 bytes reserved */
  75         in_additional_information       = IVAL(inbody, 0x0C);
  76         in_file_id_persistent           = BVAL(inbody, 0x10);
  77         in_file_id_volatile             = BVAL(inbody, 0x18);
  78
  79         if (in_input_buffer_offset == 0 && in_input_buffer_length == 0) {
  80                 /* This is ok */
  81         } else if (in_input_buffer_offset !=
  82                    (SMB2_HDR_BODY + SMBD_SMB2_IN_BODY_LEN(req))) {
  83                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  84         }
  85
  86         if (in_input_buffer_length > SMBD_SMB2_IN_DYN_LEN(req)) {
  87                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  88         }
  89
  90         in_input_buffer.data = SMBD_SMB2_IN_DYN_PTR(req);
  91         in_input_buffer.length = in_input_buffer_length;
  92
  93         if (in_input_buffer.length > xconn->smb2.server.max_trans) {
  94                 DEBUG(2,("smbd_smb2_request_process_setinfo: "
  95                          "client ignored max trans: %s: 0x%08X: 0x%08X\n",
  96                          __location__, (unsigned)in_input_buffer.length,
  97                          (unsigned)xconn->smb2.server.max_trans));
  98                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  99         }
 100
 101         status = smbd_smb2_request_verify_creditcharge(req,
 102                                                 in_input_buffer.length);
 103         if (!NT_STATUS_IS_OK(status)) {
 104                 return smbd_smb2_request_error(req, status);
 105         }
 106
 107         in_fsp = file_fsp_smb2(req, in_file_id_persistent, in_file_id_volatile);
 108         if (in_fsp == NULL) {
 109                 return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
 110         }
 111
 112         subreq = smbd_smb2_setinfo_send(req, req->sconn->ev_ctx,
 113                                         req, in_fsp,
 114                                         in_info_type,
 115                                         in_file_info_class,
 116                                         in_input_buffer,
 117                                         in_additional_information);
 118         if (subreq == NULL) {
 119                 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 120         }
 121         tevent_req_set_callback(subreq, smbd_smb2_request_setinfo_done, req);
 122
 123         return smbd_smb2_request_pending_queue(req, subreq, 500);
 124 }
 125
 126 static void smbd_smb2_request_setinfo_done(struct tevent_req *subreq)
 127 {
 128         struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
 129                                         struct smbd_smb2_request);
 130         DATA_BLOB outbody;
 131         NTSTATUS status;
 132         NTSTATUS error; /* transport error */
 133
 134         status = smbd_smb2_setinfo_recv(subreq);
 135         TALLOC_FREE(subreq);
 136         if (!NT_STATUS_IS_OK(status)) {
 137                 error = smbd_smb2_request_error(req, status);
 138                 if (!NT_STATUS_IS_OK(error)) {
 139                         smbd_server_connection_terminate(req->xconn,
 140                                                          nt_errstr(error));
 141                         return;
 142                 }
 143                 return;
 144         }
 145
 146         outbody = smbd_smb2_generate_outbody(req, 0x02);
 147         if (outbody.data == NULL) {
 148                 error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 149                 if (!NT_STATUS_IS_OK(error)) {
 150                         smbd_server_connection_terminate(req->xconn,
 151                                                          nt_errstr(error));
 152                         return;
 153                 }
 154                 return;
 155         }
 156
 157         SSVAL(outbody.data, 0x00, 0x02);        /* struct size */
 158
 159         error = smbd_smb2_request_done(req, outbody, NULL);
 160         if (!NT_STATUS_IS_OK(error)) {
 161                 smbd_server_connection_terminate(req->xconn,
 162                                                  nt_errstr(error));
 163                 return;
 164         }
 165 }
 166
 167 struct defer_rename_state {
 168         struct tevent_req *req;
 169         struct smbd_smb2_request *smb2req;
 170         struct tevent_context *ev;
 171         struct files_struct *fsp;
 172         char *data;
 173         int data_size;
 174 };
 175
 176 static int defer_rename_state_destructor(struct defer_rename_state *rename_state)
 177 {
 178         SAFE_FREE(rename_state->data);
 179         return 0;
 180 }
 181
 182 static void defer_rename_done(struct tevent_req *subreq);
 183
 184 struct delay_rename_lease_break_state {
 185         struct files_struct *fsp;
 186         bool delay;
 187 };
 188
 189 static bool delay_rename_lease_break_fn(
 190         struct share_mode_entry *e,
 191         void *private_data)
 192 {
 193         struct delay_rename_lease_break_state *state = private_data;
 194         struct files_struct *fsp = state->fsp;
 195         uint32_t e_lease_type, break_to;
 196         bool ours, stale;
 197
 198         ours = smb2_lease_equal(fsp_client_guid(fsp),
 199                                 &fsp->lease->lease.lease_key,
 200                                 &e->client_guid,
 201                                 &e->lease_key);
 202         if (ours) {
 203                 return false;
 204         }
 205
 206         e_lease_type = get_lease_type(e, fsp->file_id);
 207
 208         if ((e_lease_type & SMB2_LEASE_HANDLE) == 0) {
 209                 return false;
 210         }
 211
 212         stale = share_entry_stale_pid(e);
 213         if (stale) {
 214                 return false;
 215         }
 216
 217         state->delay = true;
 218         break_to = (e_lease_type & ~SMB2_LEASE_HANDLE);
 219
 220         send_break_message(
 221                 fsp->conn->sconn->msg_ctx, &fsp->file_id, e, break_to);
 222
 223         return false;
 224 }
 225
 226 static struct tevent_req *delay_rename_for_lease_break(struct tevent_req *req,
 227                                 struct smbd_smb2_request *smb2req,
 228                                 struct tevent_context *ev,
 229                                 struct files_struct *fsp,
 230                                 struct share_mode_lock *lck,
 231                                 char *data,
 232                                 int data_size)
 233
 234 {
 235         struct tevent_req *subreq;
 236         struct defer_rename_state *rename_state;
 237         struct delay_rename_lease_break_state state = { .fsp = fsp };
 238         struct timeval timeout;
 239         bool ok;
 240
 241         if (fsp->oplock_type != LEASE_OPLOCK) {
 242                 return NULL;
 243         }
 244
 245         ok = share_mode_forall_leases(
 246                 lck, delay_rename_lease_break_fn, &state);
 247         if (!ok) {
 248                 return NULL;
 249         }
 250
 251         if (!state.delay) {
 252                 return NULL;
 253         }
 254
 255         /* Setup a watch on this record. */
 256         rename_state = talloc_zero(req, struct defer_rename_state);
 257         if (rename_state == NULL) {
 258                 return NULL;
 259         }
 260
 261         rename_state->req = req;
 262         rename_state->smb2req = smb2req;
 263         rename_state->ev = ev;
 264         rename_state->fsp = fsp;
 265         rename_state->data = data;
 266         rename_state->data_size = data_size;
 267
 268         talloc_set_destructor(rename_state, defer_rename_state_destructor);
 269
 270         subreq = share_mode_watch_send(
 271                                 rename_state,
 272                                 ev,
 273                                 lck,
 274                                 (struct server_id){0});
 275
 276         if (subreq == NULL) {
 277                 exit_server("Could not watch share mode record for rename\n");
 278         }
 279
 280         tevent_req_set_callback(subreq, defer_rename_done, rename_state);
 281
 282         timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
 283         if (!tevent_req_set_endtime(subreq,
 284                         ev,
 285                         timeval_sum(&smb2req->request_time, &timeout))) {
 286                 exit_server("Could not set rename timeout\n");
 287         }
 288
 289         return subreq;
 290 }
 291
 292 static void defer_rename_done(struct tevent_req *subreq)
 293 {
 294         struct defer_rename_state *state = tevent_req_callback_data(
 295                 subreq, struct defer_rename_state);
 296         NTSTATUS status;
 297         struct share_mode_lock *lck;
 298         int ret_size = 0;
 299         bool ok;
 300
 301         status = share_mode_watch_recv(subreq, NULL, NULL);
 302         TALLOC_FREE(subreq);
 303         if (!NT_STATUS_IS_OK(status)) {
 304                 DEBUG(5, ("dbwrap_record_watch_recv returned %s\n",
 305                         nt_errstr(status)));
 306                 tevent_req_nterror(state->req, status);
 307                 return;
 308         }
 309
 310         /*
 311          * Make sure we run as the user again
 312          */
 313         ok = change_to_user_and_service(
 314                 state->smb2req->tcon->compat,
 315                 state->smb2req->session->global->session_wire_id);
 316         if (!ok) {
 317                 tevent_req_nterror(state->req, NT_STATUS_ACCESS_DENIED);
 318                 return;
 319         }
 320
 321         /* Do we still need to wait ? */
 322         lck = get_existing_share_mode_lock(state->req, state->fsp->file_id);
 323         if (lck == NULL) {
 324                 tevent_req_nterror(state->req, NT_STATUS_UNSUCCESSFUL);
 325                 return;
 326         }
 327         subreq = delay_rename_for_lease_break(state->req,
 328                                 state->smb2req,
 329                                 state->ev,
 330                                 state->fsp,
 331                                 lck,
 332                                 state->data,
 333                                 state->data_size);
 334         if (subreq) {
 335                 /* Yep - keep waiting. */
 336                 state->data = NULL;
 337                 TALLOC_FREE(state);
 338                 TALLOC_FREE(lck);
 339                 return;
 340         }
 341
 342         /* Do the rename under the lock. */
 343         status = smbd_do_setfilepathinfo(state->fsp->conn,
 344                                 state->smb2req->smb1req,
 345                                 state,
 346                                 SMB2_FILE_RENAME_INFORMATION_INTERNAL,
 347                                 state->fsp,
 348                                 state->fsp->fsp_name,
 349                                 &state->data,
 350                                 state->data_size,
 351                                 &ret_size);
 352
 353         TALLOC_FREE(lck);
 354         SAFE_FREE(state->data);
 355
 356         if (!NT_STATUS_IS_OK(status)) {
 357                 tevent_req_nterror(state->req, status);
 358                 return;
 359         }
 360
 361         tevent_req_done(state->req);
 362 }
 363
 364 struct smbd_smb2_setinfo_state {
 365         struct smbd_smb2_request *smb2req;
 366 };
 367
 368 static struct tevent_req *smbd_smb2_setinfo_send(TALLOC_CTX *mem_ctx,
 369                                                  struct tevent_context *ev,
 370                                                  struct smbd_smb2_request *smb2req,
 371                                                  struct files_struct *fsp,
 372                                                  uint8_t in_info_type,
 373                                                  uint8_t in_file_info_class,
 374                                                  DATA_BLOB in_input_buffer,
 375                                                  uint32_t in_additional_information)
 376 {
 377         struct tevent_req *req = NULL;
 378         struct smbd_smb2_setinfo_state *state = NULL;
 379         struct smb_request *smbreq = NULL;
 380         connection_struct *conn = smb2req->tcon->compat;
 381         struct share_mode_lock *lck = NULL;
 382         NTSTATUS status;
 383         int ret;
 384
 385         req = tevent_req_create(mem_ctx, &state,
 386                                 struct smbd_smb2_setinfo_state);
 387         if (req == NULL) {
 388                 return NULL;
 389         }
 390         state->smb2req = smb2req;
 391
 392         DEBUG(10,("smbd_smb2_setinfo_send: %s - %s\n",
 393                   fsp_str_dbg(fsp), fsp_fnum_dbg(fsp)));
 394
 395         smbreq = smbd_smb2_fake_smb_request(smb2req, fsp);
 396         if (tevent_req_nomem(smbreq, req)) {
 397                 return tevent_req_post(req, ev);
 398         }
 399
 400         if (IS_IPC(conn)) {
 401                 tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
 402                 return tevent_req_post(req, ev);
 403         }
 404
 405         switch (in_info_type) {
 406         case SMB2_0_INFO_FILE:
 407         {
 408                 uint16_t file_info_level;
 409                 char *data;
 410                 int data_size;
 411                 int ret_size = 0;
 412
 413
 414                 file_info_level = in_file_info_class + 1000;
 415                 if (file_info_level == SMB_FILE_RENAME_INFORMATION) {
 416                         /* SMB2_FILE_RENAME_INFORMATION_INTERNAL == 0xFF00 + in_file_info_class */
 417                         file_info_level = SMB2_FILE_RENAME_INFORMATION_INTERNAL;
 418                 }
 419
 420                 if (fsp_get_pathref_fd(fsp) == -1) {
 421                         /*
 422                          * This is actually a SETFILEINFO on a directory
 423                          * handle (returned from an NT SMB). NT5.0 seems
 424                          * to do this call. JRA.
 425                          */
 426                         ret = vfs_stat(fsp->conn, fsp->fsp_name);
 427                         if (ret != 0) {
 428                                 DBG_WARNING("vfs_stat() of %s failed (%s)\n",
 429                                             fsp_str_dbg(fsp),
 430                                             strerror(errno));
 431                                 status = map_nt_error_from_unix(errno);
 432                                 tevent_req_nterror(req, status);
 433                                 return tevent_req_post(req, ev);
 434                         }
 435                 } else if (fsp->print_file) {
 436                         /*
 437                          * Doing a DELETE_ON_CLOSE should cancel a print job.
 438                          */
 439                         if ((file_info_level == SMB_SET_FILE_DISPOSITION_INFO)
 440                             && in_input_buffer.length >= 1
 441                             && CVAL(in_input_buffer.data,0)) {
 442                                 fsp->fsp_flags.delete_on_close = true;
 443
 444                                 DEBUG(3,("smbd_smb2_setinfo_send: "
 445                                          "Cancelling print job (%s)\n",
 446                                          fsp_str_dbg(fsp)));
 447
 448                                 tevent_req_done(req);
 449                                 return tevent_req_post(req, ev);
 450                         }
 451                         tevent_req_nterror(req, NT_STATUS_OBJECT_PATH_INVALID);
 452                         return tevent_req_post(req, ev);
 453                 } else {
 454                         /*
 455                          * Original code - this is an open file.
 456                          */
 457
 458                         status = vfs_stat_fsp(fsp);
 459                         if (!NT_STATUS_IS_OK(status)) {
 460                                 DEBUG(3,("smbd_smb2_setinfo_send: fstat "
 461                                          "of %s failed (%s)\n",
 462                                          fsp_fnum_dbg(fsp),
 463                                          nt_errstr(status)));
 464                                 tevent_req_nterror(req, status);
 465                                 return tevent_req_post(req, ev);
 466                         }
 467                 }
 468
 469                 data = NULL;
 470                 data_size = in_input_buffer.length;
 471                 if (data_size > 0) {
 472                         data = (char *)SMB_MALLOC_ARRAY(char, data_size);
 473                         if (tevent_req_nomem(data, req)) {
 474                                 return tevent_req_post(req, ev);
 475                         }
 476                         memcpy(data, in_input_buffer.data, data_size);
 477                 }
 478
 479                 if (file_info_level == SMB2_FILE_RENAME_INFORMATION_INTERNAL) {
 480                         struct tevent_req *subreq;
 481
 482                         lck = get_existing_share_mode_lock(mem_ctx,
 483                                                         fsp->file_id);
 484                         if (lck == NULL) {
 485                                 SAFE_FREE(data);
 486                                 tevent_req_nterror(req,
 487                                         NT_STATUS_UNSUCCESSFUL);
 488                                 return tevent_req_post(req, ev);
 489                         }
 490
 491                         subreq = delay_rename_for_lease_break(req,
 492                                                         smb2req,
 493                                                         ev,
 494                                                         fsp,
 495                                                         lck,
 496                                                         data,
 497                                                         data_size);
 498                         if (subreq) {
 499                                 /* Wait for lease break response. */
 500
 501                                 /* Ensure we can't be closed in flight. */
 502                                 if (!aio_add_req_to_fsp(fsp, req)) {
 503                                         TALLOC_FREE(lck);
 504                                         tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
 505                                         return tevent_req_post(req, ev);
 506                                 }
 507
 508                                 TALLOC_FREE(lck);
 509                                 return req;
 510                         }
 511                 }
 512
 513                 status = smbd_do_setfilepathinfo(conn, smbreq, state,
 514                                                  file_info_level,
 515                                                  fsp,
 516                                                  fsp->fsp_name,
 517                                                  &data,
 518                                                  data_size,
 519                                                  &ret_size);
 520                 TALLOC_FREE(lck);
 521                 SAFE_FREE(data);
 522                 if (!NT_STATUS_IS_OK(status)) {
 523                         if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_LEVEL)) {
 524                                 status = NT_STATUS_INVALID_INFO_CLASS;
 525                         }
 526                         tevent_req_nterror(req, status);
 527                         return tevent_req_post(req, ev);
 528                 }
 529                 break;
 530         }
 531
 532         case SMB2_0_INFO_FILESYSTEM:
 533         {
 534                 uint16_t file_info_level = in_file_info_class + 1000;
 535
 536                 status = smbd_do_setfsinfo(conn, smbreq, state,
 537                                         file_info_level,
 538                                         fsp,
 539                                         &in_input_buffer);
 540                 if (!NT_STATUS_IS_OK(status)) {
 541                         if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_LEVEL)) {
 542                                 status = NT_STATUS_INVALID_INFO_CLASS;
 543                         }
 544                         tevent_req_nterror(req, status);
 545                         return tevent_req_post(req, ev);
 546                 }
 547                 break;
 548         }
 549
 550         case SMB2_0_INFO_SECURITY:
 551         {
 552                 if (!CAN_WRITE(conn)) {
 553                         tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
 554                         return tevent_req_post(req, ev);
 555                 }
 556
 557                 status = set_sd_blob(fsp,
 558                                 in_input_buffer.data,
 559                                 in_input_buffer.length,
 560                                 in_additional_information &
 561                                 SMB_SUPPORTED_SECINFO_FLAGS);
 562                 if (!NT_STATUS_IS_OK(status)) {
 563                         tevent_req_nterror(req, status);
 564                         return tevent_req_post(req, ev);
 565                 }
 566                 break;
 567         }
 568
 569         case SMB2_0_INFO_QUOTA:
 570         {
 571 #ifdef HAVE_SYS_QUOTAS
 572                 struct file_quota_information info = {0};
 573                 SMB_NTQUOTA_STRUCT qt = {0};
 574                 enum ndr_err_code err;
 575
 576                 if (!fsp->fake_file_handle) {
 577                         tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 578                         return tevent_req_post(req, ev);
 579                 }
 580                 err = ndr_pull_struct_blob(
 581                         &in_input_buffer, state, &info,
 582                         (ndr_pull_flags_fn_t)ndr_pull_file_quota_information);
 583                 if (!NDR_ERR_CODE_IS_SUCCESS(err)) {
 584                         tevent_req_nterror(req, NT_STATUS_UNSUCCESSFUL);
 585                         return tevent_req_post(req, ev);
 586                 }
 587
 588                 qt.usedspace = info.quota_used;
 589
 590                 qt.softlim = info.quota_threshold;
 591
 592                 qt.hardlim = info.quota_limit;
 593
 594                 qt.sid = info.sid;
 595                 ret = vfs_set_ntquota(fsp, SMB_USER_QUOTA_TYPE, &qt.sid, &qt);
 596                 if (ret !=0 ) {
 597                         status = map_nt_error_from_unix(errno);
 598                         tevent_req_nterror(req, status);
 599                         return tevent_req_post(req, ev);
 600                 }
 601                 status = NT_STATUS_OK;
 602                 break;
 603 #else
 604                 tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
 605                 return tevent_req_post(req, ev);
 606 #endif
 607         }
 608         default:
 609                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 610                 return tevent_req_post(req, ev);
 611         }
 612
 613         tevent_req_done(req);
 614         return tevent_req_post(req, ev);
 615 }
 616
 617 static NTSTATUS smbd_smb2_setinfo_recv(struct tevent_req *req)
 618 {
 619         NTSTATUS status;
 620
 621         if (tevent_req_is_nterror(req, &status)) {
 622                 tevent_req_received(req);
 623                 return status;
 624         }
 625
 626         tevent_req_received(req);
 627         return NT_STATUS_OK;
 628 }