source3/smbd/smb2_query_directory.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 "locking/share_mode_lock.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 "system/filesys.h"
  29 #include "lib/pthreadpool/pthreadpool_tevent.h"
  30
  31 #undef DBGC_CLASS
  32 #define DBGC_CLASS DBGC_SMB2
  33
  34 static struct tevent_req *smbd_smb2_query_directory_send(TALLOC_CTX *mem_ctx,
  35                                               struct tevent_context *ev,
  36                                               struct smbd_smb2_request *smb2req,
  37                                               struct files_struct *in_fsp,
  38                                               uint8_t in_file_info_class,
  39                                               uint8_t in_flags,
  40                                               uint32_t in_file_index,
  41                                               uint32_t in_output_buffer_length,
  42                                               const char *in_file_name);
  43 static NTSTATUS smbd_smb2_query_directory_recv(struct tevent_req *req,
  44                                     TALLOC_CTX *mem_ctx,
  45                                     DATA_BLOB *out_output_buffer);
  46
  47 static void smbd_smb2_request_find_done(struct tevent_req *subreq);
  48 NTSTATUS smbd_smb2_request_process_query_directory(struct smbd_smb2_request *req)
  49 {
  50         NTSTATUS status;
  51         const uint8_t *inbody;
  52         uint8_t in_file_info_class;
  53         uint8_t in_flags;
  54         uint32_t in_file_index;
  55         uint64_t in_file_id_persistent;
  56         uint64_t in_file_id_volatile;
  57         struct files_struct *in_fsp;
  58         uint16_t in_file_name_offset;
  59         uint16_t in_file_name_length;
  60         DATA_BLOB in_file_name_buffer;
  61         char *in_file_name_string;
  62         size_t in_file_name_string_size;
  63         uint32_t in_output_buffer_length;
  64         struct tevent_req *subreq;
  65         bool ok;
  66
  67         status = smbd_smb2_request_verify_sizes(req, 0x21);
  68         if (!NT_STATUS_IS_OK(status)) {
  69                 return smbd_smb2_request_error(req, status);
  70         }
  71         inbody = SMBD_SMB2_IN_BODY_PTR(req);
  72
  73         in_file_info_class              = CVAL(inbody, 0x02);
  74         in_flags                        = CVAL(inbody, 0x03);
  75         in_file_index                   = IVAL(inbody, 0x04);
  76         in_file_id_persistent           = BVAL(inbody, 0x08);
  77         in_file_id_volatile             = BVAL(inbody, 0x10);
  78         in_file_name_offset             = SVAL(inbody, 0x18);
  79         in_file_name_length             = SVAL(inbody, 0x1A);
  80         in_output_buffer_length         = IVAL(inbody, 0x1C);
  81
  82         if (in_file_name_offset == 0 && in_file_name_length == 0) {
  83                 /* This is ok */
  84         } else if (in_file_name_offset !=
  85                    (SMB2_HDR_BODY + SMBD_SMB2_IN_BODY_LEN(req))) {
  86                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  87         }
  88
  89         if (in_file_name_length > SMBD_SMB2_IN_DYN_LEN(req)) {
  90                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  91         }
  92
  93         /* The output header is 8 bytes. */
  94         if (in_output_buffer_length <= 8) {
  95                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  96         }
  97
  98         DEBUG(10,("smbd_smb2_request_find_done: in_output_buffer_length = %u\n",
  99                 (unsigned int)in_output_buffer_length ));
 100
 101         /* Take into account the output header. */
 102         in_output_buffer_length -= 8;
 103
 104         in_file_name_buffer.data = SMBD_SMB2_IN_DYN_PTR(req);
 105         in_file_name_buffer.length = in_file_name_length;
 106
 107         ok = convert_string_talloc(req, CH_UTF16, CH_UNIX,
 108                                    in_file_name_buffer.data,
 109                                    in_file_name_buffer.length,
 110                                    &in_file_name_string,
 111                                    &in_file_name_string_size);
 112         if (!ok) {
 113                 return smbd_smb2_request_error(req, NT_STATUS_ILLEGAL_CHARACTER);
 114         }
 115
 116         if (in_file_name_buffer.length == 0) {
 117                 in_file_name_string_size = 0;
 118         }
 119
 120         if (strlen(in_file_name_string) != in_file_name_string_size) {
 121                 return smbd_smb2_request_error(req, NT_STATUS_OBJECT_NAME_INVALID);
 122         }
 123
 124         in_fsp = file_fsp_smb2(req, in_file_id_persistent, in_file_id_volatile);
 125         if (in_fsp == NULL) {
 126                 return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
 127         }
 128
 129         subreq = smbd_smb2_query_directory_send(req, req->sconn->ev_ctx,
 130                                      req, in_fsp,
 131                                      in_file_info_class,
 132                                      in_flags,
 133                                      in_file_index,
 134                                      in_output_buffer_length,
 135                                      in_file_name_string);
 136         if (subreq == NULL) {
 137                 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 138         }
 139         tevent_req_set_callback(subreq, smbd_smb2_request_find_done, req);
 140
 141         return smbd_smb2_request_pending_queue(req, subreq, 500);
 142 }
 143
 144 static void smbd_smb2_request_find_done(struct tevent_req *subreq)
 145 {
 146         struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
 147                                         struct smbd_smb2_request);
 148         DATA_BLOB outbody;
 149         DATA_BLOB outdyn;
 150         uint16_t out_output_buffer_offset;
 151         DATA_BLOB out_output_buffer = data_blob_null;
 152         NTSTATUS status;
 153         NTSTATUS error; /* transport error */
 154
 155         status = smbd_smb2_query_directory_recv(subreq,
 156                                      req,
 157                                      &out_output_buffer);
 158         TALLOC_FREE(subreq);
 159         if (!NT_STATUS_IS_OK(status)) {
 160                 error = smbd_smb2_request_error(req, status);
 161                 if (!NT_STATUS_IS_OK(error)) {
 162                         smbd_server_connection_terminate(req->xconn,
 163                                                          nt_errstr(error));
 164                         return;
 165                 }
 166                 return;
 167         }
 168
 169         out_output_buffer_offset = SMB2_HDR_BODY + 0x08;
 170
 171         outbody = smbd_smb2_generate_outbody(req, 0x08);
 172         if (outbody.data == NULL) {
 173                 error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 174                 if (!NT_STATUS_IS_OK(error)) {
 175                         smbd_server_connection_terminate(req->xconn,
 176                                                          nt_errstr(error));
 177                         return;
 178                 }
 179                 return;
 180         }
 181
 182         SSVAL(outbody.data, 0x00, 0x08 + 1);    /* struct size */
 183         SSVAL(outbody.data, 0x02,
 184               out_output_buffer_offset);        /* output buffer offset */
 185         SIVAL(outbody.data, 0x04,
 186               out_output_buffer.length);        /* output buffer length */
 187
 188         DEBUG(10,("smbd_smb2_request_find_done: out_output_buffer.length = %u\n",
 189                 (unsigned int)out_output_buffer.length ));
 190
 191         outdyn = out_output_buffer;
 192
 193         error = smbd_smb2_request_done(req, outbody, &outdyn);
 194         if (!NT_STATUS_IS_OK(error)) {
 195                 smbd_server_connection_terminate(req->xconn,
 196                                                  nt_errstr(error));
 197                 return;
 198         }
 199 }
 200
 201 static struct tevent_req *fetch_write_time_send(TALLOC_CTX *mem_ctx,
 202                                                 struct tevent_context *ev,
 203                                                 connection_struct *conn,
 204                                                 struct file_id id,
 205                                                 int info_level,
 206                                                 char *entry_marshall_buf,
 207                                                 bool *stop);
 208 static NTSTATUS fetch_write_time_recv(struct tevent_req *req);
 209
 210 static struct tevent_req *fetch_dos_mode_send(
 211         TALLOC_CTX *mem_ctx,
 212         struct tevent_context *ev,
 213         struct files_struct *dir_fsp,
 214         struct smb_filename **smb_fname,
 215         uint32_t info_level,
 216         uint8_t *entry_marshall_buf);
 217
 218 static NTSTATUS fetch_dos_mode_recv(struct tevent_req *req);
 219
 220 struct smbd_smb2_query_directory_state {
 221         struct tevent_context *ev;
 222         struct smbd_smb2_request *smb2req;
 223         uint64_t async_sharemode_count;
 224         uint32_t find_async_delay_usec;
 225         DATA_BLOB out_output_buffer;
 226         struct smb_request *smbreq;
 227         int in_output_buffer_length;
 228         struct files_struct *fsp;
 229         const char *in_file_name;
 230         NTSTATUS empty_status;
 231         uint32_t info_level;
 232         uint32_t max_count;
 233         char *pdata;
 234         char *base_data;
 235         char *end_data;
 236         uint32_t num;
 237         uint32_t dirtype;
 238         bool dont_descend;
 239         bool ask_sharemode;
 240         bool async_dosmode;
 241         bool async_ask_sharemode;
 242         int last_entry_off;
 243         size_t max_async_dosmode_active;
 244         uint32_t async_dosmode_active;
 245         bool done;
 246 };
 247
 248 static bool smb2_query_directory_next_entry(struct tevent_req *req);
 249 static void smb2_query_directory_fetch_write_time_done(struct tevent_req *subreq);
 250 static void smb2_query_directory_dos_mode_done(struct tevent_req *subreq);
 251 static void smb2_query_directory_waited(struct tevent_req *subreq);
 252
 253 static struct tevent_req *smbd_smb2_query_directory_send(TALLOC_CTX *mem_ctx,
 254                                               struct tevent_context *ev,
 255                                               struct smbd_smb2_request *smb2req,
 256                                               struct files_struct *fsp,
 257                                               uint8_t in_file_info_class,
 258                                               uint8_t in_flags,
 259                                               uint32_t in_file_index,
 260                                               uint32_t in_output_buffer_length,
 261                                               const char *in_file_name)
 262 {
 263         struct smbXsrv_connection *xconn = smb2req->xconn;
 264         struct tevent_req *req;
 265         struct smbd_smb2_query_directory_state *state;
 266         connection_struct *conn = smb2req->tcon->compat;
 267         const struct loadparm_substitution *lp_sub =
 268                 loadparm_s3_global_substitution();
 269         NTSTATUS status;
 270         bool wcard_has_wild = false;
 271         struct tm tm;
 272         char *p;
 273         bool stop = false;
 274         bool ok;
 275         bool posix_dir_handle = (fsp->posix_flags & FSP_POSIX_FLAGS_OPEN);
 276
 277         req = tevent_req_create(mem_ctx, &state,
 278                                 struct smbd_smb2_query_directory_state);
 279         if (req == NULL) {
 280                 return NULL;
 281         }
 282         state->ev = ev;
 283         state->fsp = fsp;
 284         state->smb2req = smb2req;
 285         state->in_output_buffer_length = in_output_buffer_length;
 286         state->in_file_name = in_file_name;
 287         state->out_output_buffer = data_blob_null;
 288         state->dirtype = FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM | FILE_ATTRIBUTE_DIRECTORY;
 289
 290         DEBUG(10,("smbd_smb2_query_directory_send: %s - %s\n",
 291                   fsp_str_dbg(fsp), fsp_fnum_dbg(fsp)));
 292
 293         state->smbreq = smbd_smb2_fake_smb_request(smb2req);
 294         if (tevent_req_nomem(state->smbreq, req)) {
 295                 return tevent_req_post(req, ev);
 296         }
 297
 298         if (!fsp->fsp_flags.is_directory) {
 299                 tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
 300                 return tevent_req_post(req, ev);
 301         }
 302
 303         if (strcmp(state->in_file_name, "") == 0) {
 304                 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_INVALID);
 305                 return tevent_req_post(req, ev);
 306         }
 307         if (strchr_m(state->in_file_name, '\\') != NULL) {
 308                 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_INVALID);
 309                 return tevent_req_post(req, ev);
 310         }
 311         if (strchr_m(state->in_file_name, '/') != NULL) {
 312                 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_INVALID);
 313                 return tevent_req_post(req, ev);
 314         }
 315
 316         p = strptime(state->in_file_name, GMT_FORMAT, &tm);
 317         if ((p != NULL) && (*p =='\0')) {
 318                 /*
 319                  * Bogus find that asks for a shadow copy timestamp as a
 320                  * directory. The correct response is that it does not exist as
 321                  * a directory.
 322                  */
 323                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_FILE);
 324                 return tevent_req_post(req, ev);
 325         }
 326
 327         if (in_output_buffer_length > xconn->smb2.server.max_trans) {
 328                 DEBUG(2,("smbd_smb2_query_directory_send: "
 329                          "client ignored max trans:%s: 0x%08X: 0x%08X\n",
 330                          __location__, in_output_buffer_length,
 331                          xconn->smb2.server.max_trans));
 332                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 333                 return tevent_req_post(req, ev);
 334         }
 335
 336         status = smbd_smb2_request_verify_creditcharge(smb2req,
 337                                         in_output_buffer_length);
 338
 339         if (!NT_STATUS_IS_OK(status)) {
 340                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 341                 return tevent_req_post(req, ev);
 342         }
 343
 344         switch (in_file_info_class) {
 345         case SMB2_FIND_DIRECTORY_INFO:
 346                 state->info_level = SMB_FIND_FILE_DIRECTORY_INFO;
 347                 break;
 348
 349         case SMB2_FIND_FULL_DIRECTORY_INFO:
 350                 state->info_level = SMB_FIND_FILE_FULL_DIRECTORY_INFO;
 351                 break;
 352
 353         case SMB2_FIND_BOTH_DIRECTORY_INFO:
 354                 state->info_level = SMB_FIND_FILE_BOTH_DIRECTORY_INFO;
 355                 break;
 356
 357         case SMB2_FIND_NAME_INFO:
 358                 state->info_level = SMB_FIND_FILE_NAMES_INFO;
 359                 break;
 360
 361         case SMB2_FIND_ID_BOTH_DIRECTORY_INFO:
 362                 state->info_level = SMB_FIND_ID_BOTH_DIRECTORY_INFO;
 363                 break;
 364
 365         case SMB2_FIND_ID_FULL_DIRECTORY_INFO:
 366                 state->info_level = SMB_FIND_ID_FULL_DIRECTORY_INFO;
 367                 break;
 368
 369         default:
 370                 tevent_req_nterror(req, NT_STATUS_INVALID_INFO_CLASS);
 371                 return tevent_req_post(req, ev);
 372         }
 373
 374         if (in_flags & SMB2_CONTINUE_FLAG_REOPEN) {
 375                 struct vfs_open_how how = { .flags = O_RDONLY, };
 376
 377                 status = fd_close(fsp);
 378                 if (tevent_req_nterror(req, status)) {
 379                         return tevent_req_post(req, ev);
 380                 }
 381
 382                 /*
 383                  * fd_close() will close and invalidate the fsp's file
 384                  * descriptor. So we have to reopen it.
 385                  */
 386
 387 #ifdef O_DIRECTORY
 388                 how.flags |= O_DIRECTORY;
 389 #endif
 390                 status = fd_openat(conn->cwd_fsp, fsp->fsp_name, fsp, &how);
 391                 if (tevent_req_nterror(req, status)) {
 392                         return tevent_req_post(req, ev);
 393                 }
 394         }
 395
 396         if (!state->smbreq->posix_pathnames) {
 397                 wcard_has_wild = ms_has_wild(state->in_file_name);
 398         }
 399
 400         /* Ensure we've canonicalized any search path if not a wildcard. */
 401         if (!wcard_has_wild) {
 402                 /*
 403                  * We still need to do the case processing
 404                  * to save off the client-supplied last component.
 405                  * At least we know there's no @GMT normalization
 406                  * or MS-DFS paths to do in a directory mask.
 407                  */
 408                 state->in_file_name = get_original_lcomp(state,
 409                                                 conn,
 410                                                 state->in_file_name,
 411                                                 0);
 412                 if (tevent_req_nomem(state->in_file_name, req)) {
 413                         return tevent_req_post(req, ev);
 414                 }
 415         }
 416
 417         if (fsp->dptr == NULL) {
 418                 status = dptr_create(conn,
 419                                      NULL, /* req */
 420                                      fsp,
 421                                      false, /* old_handle */
 422                                      false, /* expect_close */
 423                                      0, /* spid */
 424                                      state->in_file_name, /* wcard */
 425                                      state->dirtype,
 426                                      &fsp->dptr);
 427                 if (!NT_STATUS_IS_OK(status)) {
 428                         tevent_req_nterror(req, status);
 429                         return tevent_req_post(req, ev);
 430                 }
 431
 432                 state->empty_status = NT_STATUS_NO_SUCH_FILE;
 433         } else {
 434                 state->empty_status = STATUS_NO_MORE_FILES;
 435         }
 436
 437         if (in_flags & SMB2_CONTINUE_FLAG_RESTART) {
 438                 dptr_SeekDir(fsp->dptr, 0);
 439         }
 440
 441         if (in_flags & SMB2_CONTINUE_FLAG_SINGLE) {
 442                 state->max_count = 1;
 443         } else {
 444                 state->max_count = UINT16_MAX;
 445         }
 446
 447 #define DIR_ENTRY_SAFETY_MARGIN 4096
 448
 449         state->out_output_buffer = data_blob_talloc(state, NULL,
 450                         in_output_buffer_length + DIR_ENTRY_SAFETY_MARGIN);
 451         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 452                 return tevent_req_post(req, ev);
 453         }
 454
 455         state->out_output_buffer.length = 0;
 456         state->pdata = (char *)state->out_output_buffer.data;
 457         state->base_data = state->pdata;
 458         /*
 459          * end_data must include the safety margin as it's what is
 460          * used to determine if pushed strings have been truncated.
 461          */
 462         state->end_data = state->pdata + in_output_buffer_length + DIR_ENTRY_SAFETY_MARGIN - 1;
 463
 464         DEBUG(8,("smbd_smb2_query_directory_send: dirpath=<%s> dontdescend=<%s>, "
 465                 "in_output_buffer_length = %u\n",
 466                  fsp->fsp_name->base_name, lp_dont_descend(talloc_tos(), lp_sub, SNUM(conn)),
 467                 (unsigned int)in_output_buffer_length ));
 468         if (in_list(fsp->fsp_name->base_name,lp_dont_descend(talloc_tos(), lp_sub, SNUM(conn)),
 469                         posix_dir_handle ? true : conn->case_sensitive)) {
 470                 state->dont_descend = true;
 471         }
 472
 473         /*
 474          * SMB_FIND_FILE_NAMES_INFO doesn't need stat information
 475          *
 476          * This may change when we try to improve the delete on close
 477          * handling in future.
 478          */
 479         if (state->info_level != SMB_FIND_FILE_NAMES_INFO) {
 480                 state->ask_sharemode = lp_smbd_search_ask_sharemode(SNUM(conn));
 481
 482                 state->async_dosmode = lp_smbd_async_dosmode(SNUM(conn));
 483         }
 484
 485         if (state->ask_sharemode && lp_clustering()) {
 486                 state->ask_sharemode = false;
 487                 state->async_ask_sharemode = true;
 488         }
 489
 490         if (state->async_dosmode) {
 491                 size_t max_threads;
 492
 493                 max_threads = pthreadpool_tevent_max_threads(conn->sconn->pool);
 494                 if (max_threads == 0 || !per_thread_cwd_supported()) {
 495                         state->async_dosmode = false;
 496                 }
 497
 498                 state->max_async_dosmode_active = lp_smbd_max_async_dosmode(
 499                                                         SNUM(conn));
 500                 if (state->max_async_dosmode_active == 0) {
 501                         state->max_async_dosmode_active = max_threads * 2;
 502                 }
 503         }
 504
 505         if (state->async_dosmode || state->async_ask_sharemode) {
 506                 /*
 507                  * Should we only set async_internal
 508                  * if we're not the last request in
 509                  * a compound chain?
 510                  */
 511                 smb2_request_set_async_internal(smb2req, true);
 512         }
 513
 514         /*
 515          * This gets set in autobuild for some tests
 516          */
 517         state->find_async_delay_usec = lp_parm_ulong(SNUM(conn), "smbd",
 518                                                      "find async delay usec",
 519                                                      0);
 520
 521         while (!stop) {
 522                 stop = smb2_query_directory_next_entry(req);
 523         }
 524
 525         if (!tevent_req_is_in_progress(req)) {
 526                 return tevent_req_post(req, ev);
 527         }
 528
 529         ok = aio_add_req_to_fsp(fsp, req);
 530         if (!ok) {
 531                 DBG_ERR("Could not add req to fsp\n");
 532                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 533                 return tevent_req_post(req, ev);
 534         }
 535
 536         return req;
 537 }
 538
 539 static bool smb2_query_directory_next_entry(struct tevent_req *req)
 540 {
 541         struct smbd_smb2_query_directory_state *state = tevent_req_data(
 542                 req, struct smbd_smb2_query_directory_state);
 543         struct smb_filename *smb_fname = NULL; /* relative to fsp !! */
 544         bool got_exact_match = false;
 545         int off = state->out_output_buffer.length;
 546         int space_remaining = state->in_output_buffer_length - off;
 547         struct file_id file_id;
 548         NTSTATUS status;
 549         bool get_dosmode = !state->async_dosmode;
 550         bool stop = false;
 551
 552         SMB_ASSERT(space_remaining >= 0);
 553
 554         status = smbd_dirptr_lanman2_entry(state,
 555                                            state->fsp->conn,
 556                                            state->fsp->dptr,
 557                                            state->smbreq->flags2,
 558                                            state->in_file_name,
 559                                            state->dirtype,
 560                                            state->info_level,
 561                                            false, /* requires_resume_key */
 562                                            state->dont_descend,
 563                                            state->ask_sharemode,
 564                                            get_dosmode,
 565                                            8, /* align to 8 bytes */
 566                                            false, /* no padding */
 567                                            &state->pdata,
 568                                            state->base_data,
 569                                            state->end_data,
 570                                            space_remaining,
 571                                            &smb_fname,
 572                                            &got_exact_match,
 573                                            &state->last_entry_off,
 574                                            NULL,
 575                                            &file_id);
 576
 577         off = (int)PTR_DIFF(state->pdata, state->base_data);
 578
 579         if (!NT_STATUS_IS_OK(status)) {
 580                 if (NT_STATUS_EQUAL(status, NT_STATUS_ILLEGAL_CHARACTER)) {
 581                         /*
 582                          * Bad character conversion on name. Ignore this
 583                          * entry.
 584                          */
 585                         return false;
 586                 } else if (state->num > 0) {
 587                         goto last_entry_done;
 588                 } else if (NT_STATUS_EQUAL(status, STATUS_MORE_ENTRIES)) {
 589                         tevent_req_nterror(req, NT_STATUS_INFO_LENGTH_MISMATCH);
 590                         return true;
 591                 } else {
 592                         tevent_req_nterror(req, state->empty_status);
 593                         return true;
 594                 }
 595         }
 596
 597         if (state->async_ask_sharemode &&
 598             !S_ISDIR(smb_fname->st.st_ex_mode))
 599         {
 600                 struct tevent_req *subreq = NULL;
 601                 char *buf = state->base_data + state->last_entry_off;
 602
 603                 subreq = fetch_write_time_send(state,
 604                                                state->ev,
 605                                                state->fsp->conn,
 606                                                file_id,
 607                                                state->info_level,
 608                                                buf,
 609                                                &stop);
 610                 if (tevent_req_nomem(subreq, req)) {
 611                         return true;
 612                 }
 613                 tevent_req_set_callback(
 614                         subreq,
 615                         smb2_query_directory_fetch_write_time_done,
 616                         req);
 617                 state->async_sharemode_count++;
 618         }
 619
 620         if (state->async_dosmode) {
 621                 struct tevent_req *subreq = NULL;
 622                 uint8_t *buf = NULL;
 623                 size_t outstanding_aio;
 624
 625                 buf = (uint8_t *)state->base_data + state->last_entry_off;
 626
 627                 subreq = fetch_dos_mode_send(state,
 628                                              state->ev,
 629                                              state->fsp,
 630                                              &smb_fname,
 631                                              state->info_level,
 632                                              buf);
 633                 if (tevent_req_nomem(subreq, req)) {
 634                         return true;
 635                 }
 636                 tevent_req_set_callback(subreq,
 637                                         smb2_query_directory_dos_mode_done,
 638                                         req);
 639
 640                 state->async_dosmode_active++;
 641
 642                 outstanding_aio = pthreadpool_tevent_queued_jobs(
 643                                         state->fsp->conn->sconn->pool);
 644
 645                 if (outstanding_aio > state->max_async_dosmode_active) {
 646                         stop = true;
 647                 }
 648         }
 649
 650         TALLOC_FREE(smb_fname);
 651
 652         state->num++;
 653         state->out_output_buffer.length = off;
 654
 655         if (!state->done && state->num < state->max_count) {
 656                 return stop;
 657         }
 658
 659 last_entry_done:
 660         SIVAL(state->out_output_buffer.data, state->last_entry_off, 0);
 661
 662         state->done = true;
 663
 664         if (state->async_sharemode_count > 0) {
 665                 DBG_DEBUG("Stopping after %"PRIu64" async mtime "
 666                           "updates\n", state->async_sharemode_count);
 667                 return true;
 668         }
 669
 670         if (state->async_dosmode_active > 0) {
 671                 return true;
 672         }
 673
 674         if (state->find_async_delay_usec > 0) {
 675                 struct timeval tv;
 676                 struct tevent_req *subreq = NULL;
 677
 678                 /*
 679                  * Should we only set async_internal
 680                  * if we're not the last request in
 681                  * a compound chain?
 682                  */
 683                 smb2_request_set_async_internal(state->smb2req, true);
 684
 685                 tv = timeval_current_ofs(0, state->find_async_delay_usec);
 686
 687                 subreq = tevent_wakeup_send(state, state->ev, tv);
 688                 if (tevent_req_nomem(subreq, req)) {
 689                         return true;
 690                 }
 691                 tevent_req_set_callback(subreq,
 692                                         smb2_query_directory_waited,
 693                                         req);
 694                 return true;
 695         }
 696
 697         tevent_req_done(req);
 698         return true;
 699 }
 700
 701 static void smb2_query_directory_check_next_entry(struct tevent_req *req);
 702
 703 static void smb2_query_directory_fetch_write_time_done(struct tevent_req *subreq)
 704 {
 705         struct tevent_req *req = tevent_req_callback_data(
 706                 subreq, struct tevent_req);
 707         struct smbd_smb2_query_directory_state *state = tevent_req_data(
 708                 req, struct smbd_smb2_query_directory_state);
 709         NTSTATUS status;
 710         bool ok;
 711
 712         /*
 713          * Make sure we run as the user again
 714          */
 715         ok = change_to_user_and_service_by_fsp(state->fsp);
 716         SMB_ASSERT(ok);
 717
 718         state->async_sharemode_count--;
 719
 720         status = fetch_write_time_recv(subreq);
 721         TALLOC_FREE(subreq);
 722         if (tevent_req_nterror(req, status)) {
 723                 return;
 724         }
 725
 726         smb2_query_directory_check_next_entry(req);
 727         return;
 728 }
 729
 730 static void smb2_query_directory_dos_mode_done(struct tevent_req *subreq)
 731 {
 732         struct tevent_req *req =
 733                 tevent_req_callback_data(subreq,
 734                 struct tevent_req);
 735         struct smbd_smb2_query_directory_state *state =
 736                 tevent_req_data(req,
 737                 struct smbd_smb2_query_directory_state);
 738         NTSTATUS status;
 739         bool ok;
 740
 741         /*
 742          * Make sure we run as the user again
 743          */
 744         ok = change_to_user_and_service_by_fsp(state->fsp);
 745         SMB_ASSERT(ok);
 746
 747         status = fetch_dos_mode_recv(subreq);
 748         TALLOC_FREE(subreq);
 749         if (tevent_req_nterror(req, status)) {
 750                 return;
 751         }
 752
 753         state->async_dosmode_active--;
 754
 755         smb2_query_directory_check_next_entry(req);
 756         return;
 757 }
 758
 759 static void smb2_query_directory_check_next_entry(struct tevent_req *req)
 760 {
 761         struct smbd_smb2_query_directory_state *state = tevent_req_data(
 762                 req, struct smbd_smb2_query_directory_state);
 763         bool stop = false;
 764
 765         if (!state->done) {
 766                 while (!stop) {
 767                         stop = smb2_query_directory_next_entry(req);
 768                 }
 769                 return;
 770         }
 771
 772         if (state->async_sharemode_count > 0 ||
 773             state->async_dosmode_active > 0)
 774         {
 775                 return;
 776         }
 777
 778         if (state->find_async_delay_usec > 0) {
 779                 struct timeval tv;
 780                 struct tevent_req *subreq = NULL;
 781
 782                 tv = timeval_current_ofs(0, state->find_async_delay_usec);
 783
 784                 subreq = tevent_wakeup_send(state, state->ev, tv);
 785                 if (tevent_req_nomem(subreq, req)) {
 786                         tevent_req_post(req, state->ev);
 787                         return;
 788                 }
 789                 tevent_req_set_callback(subreq,
 790                                         smb2_query_directory_waited,
 791                                         req);
 792                 return;
 793         }
 794
 795         tevent_req_done(req);
 796         return;
 797 }
 798
 799 static void smb2_query_directory_waited(struct tevent_req *subreq)
 800 {
 801         struct tevent_req *req = tevent_req_callback_data(
 802                 subreq, struct tevent_req);
 803         bool ok;
 804
 805         ok = tevent_wakeup_recv(subreq);
 806         TALLOC_FREE(subreq);
 807         if (!ok) {
 808                 tevent_req_oom(req);
 809                 return;
 810         }
 811         tevent_req_done(req);
 812 }
 813
 814 static NTSTATUS smbd_smb2_query_directory_recv(struct tevent_req *req,
 815                                     TALLOC_CTX *mem_ctx,
 816                                     DATA_BLOB *out_output_buffer)
 817 {
 818         NTSTATUS status;
 819         struct smbd_smb2_query_directory_state *state = tevent_req_data(req,
 820                                              struct smbd_smb2_query_directory_state);
 821
 822         if (tevent_req_is_nterror(req, &status)) {
 823                 tevent_req_received(req);
 824                 return status;
 825         }
 826
 827         *out_output_buffer = state->out_output_buffer;
 828         talloc_steal(mem_ctx, out_output_buffer->data);
 829
 830         tevent_req_received(req);
 831         return NT_STATUS_OK;
 832 }
 833
 834 struct fetch_write_time_state {
 835         connection_struct *conn;
 836         struct file_id id;
 837         int info_level;
 838         char *entry_marshall_buf;
 839 };
 840
 841 static void fetch_write_time_done(struct tevent_req *subreq);
 842
 843 static struct tevent_req *fetch_write_time_send(TALLOC_CTX *mem_ctx,
 844                                                 struct tevent_context *ev,
 845                                                 connection_struct *conn,
 846                                                 struct file_id id,
 847                                                 int info_level,
 848                                                 char *entry_marshall_buf,
 849                                                 bool *stop)
 850 {
 851         struct tevent_req *req = NULL;
 852         struct fetch_write_time_state *state = NULL;
 853         struct tevent_req *subreq = NULL;
 854         bool req_queued;
 855
 856         *stop = false;
 857
 858         req = tevent_req_create(mem_ctx, &state, struct fetch_write_time_state);
 859         if (req == NULL) {
 860                 return NULL;
 861         }
 862
 863         *state = (struct fetch_write_time_state) {
 864                 .conn = conn,
 865                 .id = id,
 866                 .info_level = info_level,
 867                 .entry_marshall_buf = entry_marshall_buf,
 868         };
 869
 870         subreq = fetch_share_mode_send(state, ev, id, &req_queued);
 871         if (tevent_req_nomem(subreq, req)) {
 872                 return tevent_req_post(req, ev);
 873         }
 874         tevent_req_set_callback(subreq, fetch_write_time_done, req);
 875
 876         if (req_queued) {
 877                 *stop = true;
 878         }
 879         return req;
 880 }
 881
 882 static void fetch_write_time_done(struct tevent_req *subreq)
 883 {
 884         struct tevent_req *req = tevent_req_callback_data(
 885                 subreq, struct tevent_req);
 886         struct fetch_write_time_state *state = tevent_req_data(
 887                 req, struct fetch_write_time_state);
 888         struct timespec write_time;
 889         struct share_mode_lock *lck = NULL;
 890         NTSTATUS status;
 891         size_t off;
 892
 893         status = fetch_share_mode_recv(subreq, state, &lck);
 894         TALLOC_FREE(subreq);
 895         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
 896                 tevent_req_done(req);
 897                 return;
 898         }
 899         if (tevent_req_nterror(req, status)) {
 900                 return;
 901         }
 902
 903         write_time = get_share_mode_write_time(lck);
 904         TALLOC_FREE(lck);
 905
 906         if (is_omit_timespec(&write_time)) {
 907                 tevent_req_done(req);
 908                 return;
 909         }
 910
 911         switch (state->info_level) {
 912         case SMB_FIND_FILE_DIRECTORY_INFO:
 913         case SMB_FIND_FILE_FULL_DIRECTORY_INFO:
 914         case SMB_FIND_FILE_BOTH_DIRECTORY_INFO:
 915         case SMB_FIND_ID_FULL_DIRECTORY_INFO:
 916         case SMB_FIND_ID_BOTH_DIRECTORY_INFO:
 917                 off = 24;
 918                 break;
 919
 920         default:
 921                 DBG_ERR("Unsupported info_level [%d]\n", state->info_level);
 922                 tevent_req_nterror(req, NT_STATUS_INVALID_LEVEL);
 923                 return;
 924         }
 925
 926         put_long_date_full_timespec(state->conn->ts_res,
 927                                state->entry_marshall_buf + off,
 928                                &write_time);
 929
 930         tevent_req_done(req);
 931         return;
 932 }
 933
 934 static NTSTATUS fetch_write_time_recv(struct tevent_req *req)
 935 {
 936         NTSTATUS status;
 937
 938         if (tevent_req_is_nterror(req, &status)) {
 939                 tevent_req_received(req);
 940                 return status;
 941         }
 942
 943         tevent_req_received(req);
 944         return NT_STATUS_OK;
 945 }
 946
 947 struct fetch_dos_mode_state {
 948         struct files_struct *dir_fsp;
 949         struct smb_filename *smb_fname;
 950         uint32_t info_level;
 951         uint8_t *entry_marshall_buf;
 952 };
 953
 954 static void fetch_dos_mode_done(struct tevent_req *subreq);
 955
 956 static struct tevent_req *fetch_dos_mode_send(
 957                         TALLOC_CTX *mem_ctx,
 958                         struct tevent_context *ev,
 959                         struct files_struct *dir_fsp,
 960                         struct smb_filename **smb_fname,
 961                         uint32_t info_level,
 962                         uint8_t *entry_marshall_buf)
 963 {
 964         struct tevent_req *req = NULL;
 965         struct fetch_dos_mode_state *state = NULL;
 966         struct tevent_req *subreq = NULL;
 967
 968         req = tevent_req_create(mem_ctx, &state, struct fetch_dos_mode_state);
 969         if (req == NULL) {
 970                 return NULL;
 971         }
 972         *state = (struct fetch_dos_mode_state) {
 973                 .dir_fsp = dir_fsp,
 974                 .info_level = info_level,
 975                 .entry_marshall_buf = entry_marshall_buf,
 976         };
 977
 978         state->smb_fname = talloc_move(state, smb_fname);
 979
 980         subreq = dos_mode_at_send(state, ev, dir_fsp, state->smb_fname);
 981         if (tevent_req_nomem(subreq, req)) {
 982                 return tevent_req_post(req, ev);
 983         }
 984         tevent_req_set_callback(subreq, fetch_dos_mode_done, req);
 985
 986         return req;
 987 }
 988
 989 static void fetch_dos_mode_done(struct tevent_req *subreq)
 990 {
 991         struct tevent_req *req =
 992                 tevent_req_callback_data(subreq,
 993                 struct tevent_req);
 994         struct fetch_dos_mode_state *state =
 995                 tevent_req_data(req,
 996                 struct fetch_dos_mode_state);
 997         uint32_t dfs_dosmode;
 998         uint32_t dosmode;
 999         struct timespec btime_ts = {0};
1000         off_t dosmode_off;
1001         off_t btime_off;
1002         NTSTATUS status;
1003
1004         status = dos_mode_at_recv(subreq, &dosmode);
1005         TALLOC_FREE(subreq);
1006         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
1007                 tevent_req_done(req);
1008                 return;
1009         }
1010         if (tevent_req_nterror(req, status)) {
1011                 return;
1012         }
1013
1014         switch (state->info_level) {
1015         case SMB_FIND_ID_BOTH_DIRECTORY_INFO:
1016         case SMB_FIND_FILE_BOTH_DIRECTORY_INFO:
1017         case SMB_FIND_FILE_DIRECTORY_INFO:
1018         case SMB_FIND_FILE_FULL_DIRECTORY_INFO:
1019         case SMB_FIND_ID_FULL_DIRECTORY_INFO:
1020                 btime_off = 8;
1021                 dosmode_off = 56;
1022                 break;
1023
1024         default:
1025                 DBG_ERR("Unsupported info_level [%u]\n", state->info_level);
1026                 tevent_req_nterror(req, NT_STATUS_INVALID_LEVEL);
1027                 return;
1028         }
1029
1030
1031         dfs_dosmode = IVAL(state->entry_marshall_buf, dosmode_off);
1032         if (dfs_dosmode == 0) {
1033                 /*
1034                  * DOS mode for a DFS link, only overwrite if still set to 0 and
1035                  * not already populated by the lower layer for a DFS link in
1036                  * smbd_dirptr_lanman2_mode_fn().
1037                  */
1038                 SIVAL(state->entry_marshall_buf, dosmode_off, dosmode);
1039         }
1040
1041         btime_ts = get_create_timespec(state->dir_fsp->conn,
1042                                        NULL,
1043                                        state->smb_fname);
1044         if (lp_dos_filetime_resolution(SNUM(state->dir_fsp->conn))) {
1045                 dos_filetime_timespec(&btime_ts);
1046         }
1047
1048         put_long_date_full_timespec(state->dir_fsp->conn->ts_res,
1049                                (char *)state->entry_marshall_buf + btime_off,
1050                                &btime_ts);
1051
1052         tevent_req_done(req);
1053         return;
1054 }
1055
1056 static NTSTATUS fetch_dos_mode_recv(struct tevent_req *req)
1057 {
1058         NTSTATUS status;
1059
1060         if (tevent_req_is_nterror(req, &status)) {
1061                 tevent_req_received(req);
1062                 return status;
1063         }
1064
1065         tevent_req_received(req);
1066         return NT_STATUS_OK;
1067 }