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 "smbd/smbd.h"
  23 #include "smbd/globals.h"
  24 #include "../libcli/smb/smb_common.h"
  25 #include "trans2.h"
  26 #include "../lib/util/tevent_ntstatus.h"
  27 #include "system/filesys.h"
  28 #include "lib/pthreadpool/pthreadpool_tevent.h"
  29
  30 #undef DBGC_CLASS
  31 #define DBGC_CLASS DBGC_SMB2
  32
  33 static struct tevent_req *smbd_smb2_query_directory_send(TALLOC_CTX *mem_ctx,
  34                                               struct tevent_context *ev,
  35                                               struct smbd_smb2_request *smb2req,
  36                                               struct files_struct *in_fsp,
  37                                               uint8_t in_file_info_class,
  38                                               uint8_t in_flags,
  39                                               uint32_t in_file_index,
  40                                               uint32_t in_output_buffer_length,
  41                                               const char *in_file_name);
  42 static NTSTATUS smbd_smb2_query_directory_recv(struct tevent_req *req,
  43                                     TALLOC_CTX *mem_ctx,
  44                                     DATA_BLOB *out_output_buffer);
  45
  46 static void smbd_smb2_request_find_done(struct tevent_req *subreq);
  47 NTSTATUS smbd_smb2_request_process_query_directory(struct smbd_smb2_request *req)
  48 {
  49         NTSTATUS status;
  50         const uint8_t *inbody;
  51         uint8_t in_file_info_class;
  52         uint8_t in_flags;
  53         uint32_t in_file_index;
  54         uint64_t in_file_id_persistent;
  55         uint64_t in_file_id_volatile;
  56         struct files_struct *in_fsp;
  57         uint16_t in_file_name_offset;
  58         uint16_t in_file_name_length;
  59         DATA_BLOB in_file_name_buffer;
  60         char *in_file_name_string;
  61         size_t in_file_name_string_size;
  62         uint32_t in_output_buffer_length;
  63         struct tevent_req *subreq;
  64         bool ok;
  65
  66         status = smbd_smb2_request_verify_sizes(req, 0x21);
  67         if (!NT_STATUS_IS_OK(status)) {
  68                 return smbd_smb2_request_error(req, status);
  69         }
  70         inbody = SMBD_SMB2_IN_BODY_PTR(req);
  71
  72         in_file_info_class              = CVAL(inbody, 0x02);
  73         in_flags                        = CVAL(inbody, 0x03);
  74         in_file_index                   = IVAL(inbody, 0x04);
  75         in_file_id_persistent           = BVAL(inbody, 0x08);
  76         in_file_id_volatile             = BVAL(inbody, 0x10);
  77         in_file_name_offset             = SVAL(inbody, 0x18);
  78         in_file_name_length             = SVAL(inbody, 0x1A);
  79         in_output_buffer_length         = IVAL(inbody, 0x1C);
  80
  81         if (in_file_name_offset == 0 && in_file_name_length == 0) {
  82                 /* This is ok */
  83         } else if (in_file_name_offset !=
  84                    (SMB2_HDR_BODY + SMBD_SMB2_IN_BODY_LEN(req))) {
  85                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  86         }
  87
  88         if (in_file_name_length > SMBD_SMB2_IN_DYN_LEN(req)) {
  89                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  90         }
  91
  92         /* The output header is 8 bytes. */
  93         if (in_output_buffer_length <= 8) {
  94                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  95         }
  96
  97         DEBUG(10,("smbd_smb2_request_find_done: in_output_buffer_length = %u\n",
  98                 (unsigned int)in_output_buffer_length ));
  99
 100         /* Take into account the output header. */
 101         in_output_buffer_length -= 8;
 102
 103         in_file_name_buffer.data = SMBD_SMB2_IN_DYN_PTR(req);
 104         in_file_name_buffer.length = in_file_name_length;
 105
 106         ok = convert_string_talloc(req, CH_UTF16, CH_UNIX,
 107                                    in_file_name_buffer.data,
 108                                    in_file_name_buffer.length,
 109                                    &in_file_name_string,
 110                                    &in_file_name_string_size);
 111         if (!ok) {
 112                 return smbd_smb2_request_error(req, NT_STATUS_ILLEGAL_CHARACTER);
 113         }
 114
 115         if (in_file_name_buffer.length == 0) {
 116                 in_file_name_string_size = 0;
 117         }
 118
 119         if (strlen(in_file_name_string) != in_file_name_string_size) {
 120                 return smbd_smb2_request_error(req, NT_STATUS_OBJECT_NAME_INVALID);
 121         }
 122
 123         in_fsp = file_fsp_smb2(req, in_file_id_persistent, in_file_id_volatile);
 124         if (in_fsp == NULL) {
 125                 return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
 126         }
 127
 128         subreq = smbd_smb2_query_directory_send(req, req->ev_ctx,
 129                                      req, in_fsp,
 130                                      in_file_info_class,
 131                                      in_flags,
 132                                      in_file_index,
 133                                      in_output_buffer_length,
 134                                      in_file_name_string);
 135         if (subreq == NULL) {
 136                 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 137         }
 138         tevent_req_set_callback(subreq, smbd_smb2_request_find_done, req);
 139
 140         return smbd_smb2_request_pending_queue(req, subreq, 500);
 141 }
 142
 143 static void smbd_smb2_request_find_done(struct tevent_req *subreq)
 144 {
 145         struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
 146                                         struct smbd_smb2_request);
 147         DATA_BLOB outbody;
 148         DATA_BLOB outdyn;
 149         uint16_t out_output_buffer_offset;
 150         DATA_BLOB out_output_buffer = data_blob_null;
 151         NTSTATUS status;
 152         NTSTATUS error; /* transport error */
 153
 154         status = smbd_smb2_query_directory_recv(subreq,
 155                                      req,
 156                                      &out_output_buffer);
 157         TALLOC_FREE(subreq);
 158         if (!NT_STATUS_IS_OK(status)) {
 159                 error = smbd_smb2_request_error(req, status);
 160                 if (!NT_STATUS_IS_OK(error)) {
 161                         smbd_server_connection_terminate(req->xconn,
 162                                                          nt_errstr(error));
 163                         return;
 164                 }
 165                 return;
 166         }
 167
 168         out_output_buffer_offset = SMB2_HDR_BODY + 0x08;
 169
 170         outbody = smbd_smb2_generate_outbody(req, 0x08);
 171         if (outbody.data == NULL) {
 172                 error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 173                 if (!NT_STATUS_IS_OK(error)) {
 174                         smbd_server_connection_terminate(req->xconn,
 175                                                          nt_errstr(error));
 176                         return;
 177                 }
 178                 return;
 179         }
 180
 181         SSVAL(outbody.data, 0x00, 0x08 + 1);    /* struct size */
 182         SSVAL(outbody.data, 0x02,
 183               out_output_buffer_offset);        /* output buffer offset */
 184         SIVAL(outbody.data, 0x04,
 185               out_output_buffer.length);        /* output buffer length */
 186
 187         DEBUG(10,("smbd_smb2_request_find_done: out_output_buffer.length = %u\n",
 188                 (unsigned int)out_output_buffer.length ));
 189
 190         outdyn = out_output_buffer;
 191
 192         error = smbd_smb2_request_done(req, outbody, &outdyn);
 193         if (!NT_STATUS_IS_OK(error)) {
 194                 smbd_server_connection_terminate(req->xconn,
 195                                                  nt_errstr(error));
 196                 return;
 197         }
 198 }
 199
 200 static struct tevent_req *fetch_write_time_send(TALLOC_CTX *mem_ctx,
 201                                                 struct tevent_context *ev,
 202                                                 connection_struct *conn,
 203                                                 struct file_id id,
 204                                                 int info_level,
 205                                                 char *entry_marshall_buf,
 206                                                 bool *stop);
 207 static NTSTATUS fetch_write_time_recv(struct tevent_req *req);
 208
 209 static struct tevent_req *fetch_dos_mode_send(
 210         TALLOC_CTX *mem_ctx,
 211         struct smb_vfs_ev_glue *evg,
 212         struct files_struct *dir_fsp,
 213         struct smb_filename **smb_fname,
 214         uint32_t info_level,
 215         uint8_t *entry_marshall_buf);
 216
 217 static NTSTATUS fetch_dos_mode_recv(struct tevent_req *req);
 218
 219 struct smbd_smb2_query_directory_state {
 220         struct smb_vfs_ev_glue *evg;
 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         NTSTATUS status;
 268         bool wcard_has_wild = false;
 269         struct tm tm;
 270         char *p;
 271         bool stop = false;
 272         bool ok;
 273
 274         req = tevent_req_create(mem_ctx, &state,
 275                                 struct smbd_smb2_query_directory_state);
 276         if (req == NULL) {
 277                 return NULL;
 278         }
 279         state->evg = conn->user_vfs_evg;
 280         state->ev = ev;
 281         state->fsp = fsp;
 282         state->smb2req = smb2req;
 283         state->in_output_buffer_length = in_output_buffer_length;
 284         state->in_file_name = in_file_name;
 285         state->out_output_buffer = data_blob_null;
 286         state->dirtype = FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM | FILE_ATTRIBUTE_DIRECTORY;
 287
 288         DEBUG(10,("smbd_smb2_query_directory_send: %s - %s\n",
 289                   fsp_str_dbg(fsp), fsp_fnum_dbg(fsp)));
 290
 291         state->smbreq = smbd_smb2_fake_smb_request(smb2req);
 292         if (tevent_req_nomem(state->smbreq, req)) {
 293                 return tevent_req_post(req, ev);
 294         }
 295
 296         if (!fsp->is_directory) {
 297                 tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
 298                 return tevent_req_post(req, ev);
 299         }
 300
 301         if (strcmp(state->in_file_name, "") == 0) {
 302                 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_INVALID);
 303                 return tevent_req_post(req, ev);
 304         }
 305         if (strchr_m(state->in_file_name, '\\') != NULL) {
 306                 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_INVALID);
 307                 return tevent_req_post(req, ev);
 308         }
 309         if (strchr_m(state->in_file_name, '/') != NULL) {
 310                 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_INVALID);
 311                 return tevent_req_post(req, ev);
 312         }
 313
 314         p = strptime(state->in_file_name, GMT_FORMAT, &tm);
 315         if ((p != NULL) && (*p =='\0')) {
 316                 /*
 317                  * Bogus find that asks for a shadow copy timestamp as a
 318                  * directory. The correct response is that it does not exist as
 319                  * a directory.
 320                  */
 321                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_FILE);
 322                 return tevent_req_post(req, ev);
 323         }
 324
 325         if (in_output_buffer_length > xconn->smb2.server.max_trans) {
 326                 DEBUG(2,("smbd_smb2_query_directory_send: "
 327                          "client ignored max trans:%s: 0x%08X: 0x%08X\n",
 328                          __location__, in_output_buffer_length,
 329                          xconn->smb2.server.max_trans));
 330                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 331                 return tevent_req_post(req, ev);
 332         }
 333
 334         status = smbd_smb2_request_verify_creditcharge(smb2req,
 335                                         in_output_buffer_length);
 336
 337         if (!NT_STATUS_IS_OK(status)) {
 338                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 339                 return tevent_req_post(req, ev);
 340         }
 341
 342         switch (in_file_info_class) {
 343         case SMB2_FIND_DIRECTORY_INFO:
 344                 state->info_level = SMB_FIND_FILE_DIRECTORY_INFO;
 345                 break;
 346
 347         case SMB2_FIND_FULL_DIRECTORY_INFO:
 348                 state->info_level = SMB_FIND_FILE_FULL_DIRECTORY_INFO;
 349                 break;
 350
 351         case SMB2_FIND_BOTH_DIRECTORY_INFO:
 352                 state->info_level = SMB_FIND_FILE_BOTH_DIRECTORY_INFO;
 353                 break;
 354
 355         case SMB2_FIND_NAME_INFO:
 356                 state->info_level = SMB_FIND_FILE_NAMES_INFO;
 357                 break;
 358
 359         case SMB2_FIND_ID_BOTH_DIRECTORY_INFO:
 360                 state->info_level = SMB_FIND_ID_BOTH_DIRECTORY_INFO;
 361                 break;
 362
 363         case SMB2_FIND_ID_FULL_DIRECTORY_INFO:
 364                 state->info_level = SMB_FIND_ID_FULL_DIRECTORY_INFO;
 365                 break;
 366
 367         default:
 368                 tevent_req_nterror(req, NT_STATUS_INVALID_INFO_CLASS);
 369                 return tevent_req_post(req, ev);
 370         }
 371
 372         if (in_flags & SMB2_CONTINUE_FLAG_REOPEN) {
 373                 int flags;
 374
 375                 status = fd_close(fsp);
 376                 if (tevent_req_nterror(req, status)) {
 377                         return tevent_req_post(req, ev);
 378                 }
 379
 380                 /*
 381                  * fd_close() will close and invalidate the fsp's file
 382                  * descriptor. So we have to reopen it.
 383                  */
 384
 385                 flags = O_RDONLY;
 386 #ifdef O_DIRECTORY
 387                 flags |= O_DIRECTORY;
 388 #endif
 389                 status = fd_open(conn, fsp, flags, 0);
 390                 if (tevent_req_nterror(req, status)) {
 391                         return tevent_req_post(req, ev);
 392                 }
 393         }
 394
 395         if (!state->smbreq->posix_pathnames) {
 396                 wcard_has_wild = ms_has_wild(state->in_file_name);
 397         }
 398
 399         /* Ensure we've canonicalized any search path if not a wildcard. */
 400         if (!wcard_has_wild) {
 401                 struct smb_filename *smb_fname = NULL;
 402                 const char *fullpath;
 403                 char tmpbuf[PATH_MAX];
 404                 char *to_free = NULL;
 405                 uint32_t ucf_flags = UCF_SAVE_LCOMP |
 406                                      UCF_ALWAYS_ALLOW_WCARD_LCOMP |
 407                                      (state->smbreq->posix_pathnames ?
 408                                         UCF_POSIX_PATHNAMES : 0);
 409
 410                 if (ISDOT(fsp->fsp_name->base_name)) {
 411                         fullpath = state->in_file_name;
 412                 } else {
 413                         size_t len;
 414                         char *tmp;
 415
 416                         len = full_path_tos(
 417                                 fsp->fsp_name->base_name, state->in_file_name,
 418                                 tmpbuf, sizeof(tmpbuf), &tmp, &to_free);
 419                         if (len == -1) {
 420                                 tevent_req_oom(req);
 421                                 return tevent_req_post(req, ev);
 422                         }
 423                         fullpath = tmp;
 424                 }
 425                 status = filename_convert(state,
 426                                 conn,
 427                                 fullpath,
 428                                 ucf_flags,
 429                                 NULL,
 430                                 &wcard_has_wild,
 431                                 &smb_fname);
 432
 433                 TALLOC_FREE(to_free);
 434
 435                 if (tevent_req_nterror(req, status)) {
 436                         return tevent_req_post(req, ev);
 437                 }
 438
 439                 state->in_file_name = smb_fname->original_lcomp;
 440         }
 441
 442         if (fsp->dptr == NULL) {
 443                 status = dptr_create(conn,
 444                                      NULL, /* req */
 445                                      fsp,
 446                                      fsp->fsp_name,
 447                                      false, /* old_handle */
 448                                      false, /* expect_close */
 449                                      0, /* spid */
 450                                      state->in_file_name, /* wcard */
 451                                      wcard_has_wild,
 452                                      state->dirtype,
 453                                      &fsp->dptr);
 454                 if (!NT_STATUS_IS_OK(status)) {
 455                         tevent_req_nterror(req, status);
 456                         return tevent_req_post(req, ev);
 457                 }
 458
 459                 state->empty_status = NT_STATUS_NO_SUCH_FILE;
 460         } else {
 461                 state->empty_status = STATUS_NO_MORE_FILES;
 462         }
 463
 464         if (in_flags & SMB2_CONTINUE_FLAG_RESTART) {
 465                 dptr_SeekDir(fsp->dptr, 0);
 466         }
 467
 468         if (in_flags & SMB2_CONTINUE_FLAG_SINGLE) {
 469                 state->max_count = 1;
 470         } else {
 471                 state->max_count = UINT16_MAX;
 472         }
 473
 474 #define DIR_ENTRY_SAFETY_MARGIN 4096
 475
 476         state->out_output_buffer = data_blob_talloc(state, NULL,
 477                         in_output_buffer_length + DIR_ENTRY_SAFETY_MARGIN);
 478         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 479                 return tevent_req_post(req, ev);
 480         }
 481
 482         state->out_output_buffer.length = 0;
 483         state->pdata = (char *)state->out_output_buffer.data;
 484         state->base_data = state->pdata;
 485         /*
 486          * end_data must include the safety margin as it's what is
 487          * used to determine if pushed strings have been truncated.
 488          */
 489         state->end_data = state->pdata + in_output_buffer_length + DIR_ENTRY_SAFETY_MARGIN - 1;
 490
 491         DEBUG(8,("smbd_smb2_query_directory_send: dirpath=<%s> dontdescend=<%s>, "
 492                 "in_output_buffer_length = %u\n",
 493                 fsp->fsp_name->base_name, lp_dont_descend(talloc_tos(), SNUM(conn)),
 494                 (unsigned int)in_output_buffer_length ));
 495         if (in_list(fsp->fsp_name->base_name,lp_dont_descend(talloc_tos(), SNUM(conn)),
 496                         conn->case_sensitive)) {
 497                 state->dont_descend = true;
 498         }
 499
 500         /*
 501          * SMB_FIND_FILE_NAMES_INFO doesn't need stat information
 502          *
 503          * This may change when we try to improve the delete on close
 504          * handling in future.
 505          */
 506         if (state->info_level != SMB_FIND_FILE_NAMES_INFO) {
 507                 state->ask_sharemode = lp_smbd_search_ask_sharemode(SNUM(conn));
 508
 509                 state->async_dosmode = lp_smbd_async_dosmode(SNUM(conn));
 510         }
 511
 512         if (state->ask_sharemode && lp_clustering()) {
 513                 state->ask_sharemode = false;
 514                 state->async_ask_sharemode = true;
 515         }
 516
 517         if (state->async_dosmode) {
 518                 size_t max_threads;
 519
 520                 max_threads = pthreadpool_tevent_max_threads(conn->sconn->raw_thread_pool);
 521
 522                 state->max_async_dosmode_active = lp_smbd_max_async_dosmode(
 523                                                         SNUM(conn));
 524                 if (state->max_async_dosmode_active == 0) {
 525                         state->max_async_dosmode_active = max_threads * 2;
 526                 }
 527         }
 528
 529         if (state->async_dosmode || state->async_ask_sharemode) {
 530                 /*
 531                  * Should we only set async_internal
 532                  * if we're not the last request in
 533                  * a compound chain?
 534                  */
 535                 smb2_request_set_async_internal(smb2req, true);
 536         }
 537
 538         /*
 539          * This gets set in autobuild for some tests
 540          */
 541         state->find_async_delay_usec = lp_parm_ulong(SNUM(conn), "smbd",
 542                                                      "find async delay usec",
 543                                                      0);
 544
 545         while (!stop) {
 546                 stop = smb2_query_directory_next_entry(req);
 547         }
 548
 549         if (!tevent_req_is_in_progress(req)) {
 550                 return tevent_req_post(req, ev);
 551         }
 552
 553         ok = aio_add_req_to_fsp(fsp, req);
 554         if (!ok) {
 555                 DBG_ERR("Could not add req to fsp\n");
 556                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 557                 return tevent_req_post(req, ev);
 558         }
 559
 560         return req;
 561 }
 562
 563 static bool smb2_query_directory_next_entry(struct tevent_req *req)
 564 {
 565         struct smbd_smb2_query_directory_state *state = tevent_req_data(
 566                 req, struct smbd_smb2_query_directory_state);
 567         struct smb_filename *smb_fname = NULL; /* relative to fsp !! */
 568         bool got_exact_match = false;
 569         int off = state->out_output_buffer.length;
 570         int space_remaining = state->in_output_buffer_length - off;
 571         struct file_id file_id;
 572         NTSTATUS status;
 573         bool get_dosmode = !state->async_dosmode;
 574         bool stop = false;
 575
 576         SMB_ASSERT(space_remaining >= 0);
 577
 578         status = smbd_dirptr_lanman2_entry(state,
 579                                            state->fsp->conn,
 580                                            state->fsp->dptr,
 581                                            state->smbreq->flags2,
 582                                            state->in_file_name,
 583                                            state->dirtype,
 584                                            state->info_level,
 585                                            false, /* requires_resume_key */
 586                                            state->dont_descend,
 587                                            state->ask_sharemode,
 588                                            get_dosmode,
 589                                            8, /* align to 8 bytes */
 590                                            false, /* no padding */
 591                                            &state->pdata,
 592                                            state->base_data,
 593                                            state->end_data,
 594                                            space_remaining,
 595                                            &smb_fname,
 596                                            &got_exact_match,
 597                                            &state->last_entry_off,
 598                                            NULL,
 599                                            &file_id);
 600
 601         off = (int)PTR_DIFF(state->pdata, state->base_data);
 602
 603         if (!NT_STATUS_IS_OK(status)) {
 604                 if (NT_STATUS_EQUAL(status, NT_STATUS_ILLEGAL_CHARACTER)) {
 605                         /*
 606                          * Bad character conversion on name. Ignore this
 607                          * entry.
 608                          */
 609                         return false;
 610                 } else if (state->num > 0) {
 611                         goto last_entry_done;
 612                 } else if (NT_STATUS_EQUAL(status, STATUS_MORE_ENTRIES)) {
 613                         tevent_req_nterror(req, NT_STATUS_INFO_LENGTH_MISMATCH);
 614                         return true;
 615                 } else {
 616                         tevent_req_nterror(req, state->empty_status);
 617                         return true;
 618                 }
 619         }
 620
 621         if (state->async_ask_sharemode) {
 622                 struct tevent_req *subreq = NULL;
 623                 char *buf = state->base_data + state->last_entry_off;
 624
 625                 subreq = fetch_write_time_send(state,
 626                                                state->ev,
 627                                                state->fsp->conn,
 628                                                file_id,
 629                                                state->info_level,
 630                                                buf,
 631                                                &stop);
 632                 if (tevent_req_nomem(subreq, req)) {
 633                         return true;
 634                 }
 635                 tevent_req_set_callback(
 636                         subreq,
 637                         smb2_query_directory_fetch_write_time_done,
 638                         req);
 639                 state->async_sharemode_count++;
 640         }
 641
 642         if (state->async_dosmode) {
 643                 struct tevent_req *subreq = NULL;
 644                 uint8_t *buf = NULL;
 645                 size_t outstanding_aio;
 646
 647                 buf = (uint8_t *)state->base_data + state->last_entry_off;
 648
 649                 subreq = fetch_dos_mode_send(state,
 650                                              state->evg,
 651                                              state->fsp,
 652                                              &smb_fname,
 653                                              state->info_level,
 654                                              buf);
 655                 if (tevent_req_nomem(subreq, req)) {
 656                         return true;
 657                 }
 658                 tevent_req_set_callback(subreq,
 659                                         smb2_query_directory_dos_mode_done,
 660                                         req);
 661
 662                 state->async_dosmode_active++;
 663
 664                 outstanding_aio = pthreadpool_tevent_queued_jobs(
 665                                         state->fsp->conn->sconn->raw_thread_pool);
 666
 667                 if (outstanding_aio > state->max_async_dosmode_active) {
 668                         stop = true;
 669                 }
 670         }
 671
 672         TALLOC_FREE(smb_fname);
 673
 674         state->num++;
 675         state->out_output_buffer.length = off;
 676
 677         if (!state->done && state->num < state->max_count) {
 678                 return stop;
 679         }
 680
 681 last_entry_done:
 682         SIVAL(state->out_output_buffer.data, state->last_entry_off, 0);
 683
 684         state->done = true;
 685
 686         if (state->async_sharemode_count > 0) {
 687                 DBG_DEBUG("Stopping after %"PRIu64" async mtime "
 688                           "updates\n", state->async_sharemode_count);
 689                 return true;
 690         }
 691
 692         if (state->async_dosmode_active > 0) {
 693                 return true;
 694         }
 695
 696         if (state->find_async_delay_usec > 0) {
 697                 struct timeval tv;
 698                 struct tevent_req *subreq = NULL;
 699
 700                 /*
 701                  * Should we only set async_internal
 702                  * if we're not the last request in
 703                  * a compound chain?
 704                  */
 705                 smb2_request_set_async_internal(state->smb2req, true);
 706
 707                 tv = timeval_current_ofs(0, state->find_async_delay_usec);
 708
 709                 subreq = tevent_wakeup_send(state, state->ev, tv);
 710                 if (tevent_req_nomem(subreq, req)) {
 711                         return true;
 712                 }
 713                 tevent_req_set_callback(subreq,
 714                                         smb2_query_directory_waited,
 715                                         req);
 716                 return true;
 717         }
 718
 719         tevent_req_done(req);
 720         return true;
 721 }
 722
 723 static void smb2_query_directory_check_next_entry(struct tevent_req *req);
 724
 725 static void smb2_query_directory_fetch_write_time_done(struct tevent_req *subreq)
 726 {
 727         struct tevent_req *req = tevent_req_callback_data(
 728                 subreq, struct tevent_req);
 729         struct smbd_smb2_query_directory_state *state = tevent_req_data(
 730                 req, struct smbd_smb2_query_directory_state);
 731         NTSTATUS status;
 732
 733         state->async_sharemode_count--;
 734
 735         status = fetch_write_time_recv(subreq);
 736         TALLOC_FREE(subreq);
 737         if (tevent_req_nterror(req, status)) {
 738                 return;
 739         }
 740
 741         smb2_query_directory_check_next_entry(req);
 742         return;
 743 }
 744
 745 static void smb2_query_directory_dos_mode_done(struct tevent_req *subreq)
 746 {
 747         struct tevent_req *req =
 748                 tevent_req_callback_data(subreq,
 749                 struct tevent_req);
 750         struct smbd_smb2_query_directory_state *state =
 751                 tevent_req_data(req,
 752                 struct smbd_smb2_query_directory_state);
 753         NTSTATUS status;
 754
 755         status = fetch_dos_mode_recv(subreq);
 756         TALLOC_FREE(subreq);
 757         if (tevent_req_nterror(req, status)) {
 758                 return;
 759         }
 760
 761         state->async_dosmode_active--;
 762
 763         smb2_query_directory_check_next_entry(req);
 764         return;
 765 }
 766
 767 static void smb2_query_directory_check_next_entry(struct tevent_req *req)
 768 {
 769         struct smbd_smb2_query_directory_state *state = tevent_req_data(
 770                 req, struct smbd_smb2_query_directory_state);
 771         bool stop = false;
 772
 773         if (!state->done) {
 774                 while (!stop) {
 775                         stop = smb2_query_directory_next_entry(req);
 776                 }
 777                 return;
 778         }
 779
 780         if (state->async_sharemode_count > 0 ||
 781             state->async_dosmode_active > 0)
 782         {
 783                 return;
 784         }
 785
 786         if (state->find_async_delay_usec > 0) {
 787                 struct timeval tv;
 788                 struct tevent_req *subreq = NULL;
 789
 790                 tv = timeval_current_ofs(0, state->find_async_delay_usec);
 791
 792                 subreq = tevent_wakeup_send(state, state->ev, tv);
 793                 if (tevent_req_nomem(subreq, req)) {
 794                         tevent_req_post(req, state->ev);
 795                         return;
 796                 }
 797                 tevent_req_set_callback(subreq,
 798                                         smb2_query_directory_waited,
 799                                         req);
 800                 return;
 801         }
 802
 803         tevent_req_done(req);
 804         return;
 805 }
 806
 807 static void smb2_query_directory_waited(struct tevent_req *subreq)
 808 {
 809         struct tevent_req *req = tevent_req_callback_data(
 810                 subreq, struct tevent_req);
 811         bool ok;
 812
 813         ok = tevent_wakeup_recv(subreq);
 814         TALLOC_FREE(subreq);
 815         if (!ok) {
 816                 tevent_req_oom(req);
 817                 return;
 818         }
 819         tevent_req_done(req);
 820 }
 821
 822 static NTSTATUS smbd_smb2_query_directory_recv(struct tevent_req *req,
 823                                     TALLOC_CTX *mem_ctx,
 824                                     DATA_BLOB *out_output_buffer)
 825 {
 826         NTSTATUS status;
 827         struct smbd_smb2_query_directory_state *state = tevent_req_data(req,
 828                                              struct smbd_smb2_query_directory_state);
 829
 830         if (tevent_req_is_nterror(req, &status)) {
 831                 tevent_req_received(req);
 832                 return status;
 833         }
 834
 835         *out_output_buffer = state->out_output_buffer;
 836         talloc_steal(mem_ctx, out_output_buffer->data);
 837
 838         tevent_req_received(req);
 839         return NT_STATUS_OK;
 840 }
 841
 842 struct fetch_write_time_state {
 843         connection_struct *conn;
 844         struct file_id id;
 845         int info_level;
 846         char *entry_marshall_buf;
 847 };
 848
 849 static void fetch_write_time_done(struct tevent_req *subreq);
 850
 851 static struct tevent_req *fetch_write_time_send(TALLOC_CTX *mem_ctx,
 852                                                 struct tevent_context *ev,
 853                                                 connection_struct *conn,
 854                                                 struct file_id id,
 855                                                 int info_level,
 856                                                 char *entry_marshall_buf,
 857                                                 bool *stop)
 858 {
 859         struct tevent_req *req = NULL;
 860         struct fetch_write_time_state *state = NULL;
 861         struct tevent_req *subreq = NULL;
 862         bool req_queued;
 863
 864         *stop = false;
 865
 866         req = tevent_req_create(mem_ctx, &state, struct fetch_write_time_state);
 867         if (req == NULL) {
 868                 return NULL;
 869         }
 870
 871         *state = (struct fetch_write_time_state) {
 872                 .conn = conn,
 873                 .id = id,
 874                 .info_level = info_level,
 875                 .entry_marshall_buf = entry_marshall_buf,
 876         };
 877
 878         subreq = fetch_share_mode_send(state, ev, id, &req_queued);
 879         if (tevent_req_nomem(subreq, req)) {
 880                 return tevent_req_post(req, ev);
 881         }
 882         tevent_req_set_callback(subreq, fetch_write_time_done, req);
 883
 884         if (req_queued) {
 885                 *stop = true;
 886         }
 887         return req;
 888 }
 889
 890 static void fetch_write_time_done(struct tevent_req *subreq)
 891 {
 892         struct tevent_req *req = tevent_req_callback_data(
 893                 subreq, struct tevent_req);
 894         struct fetch_write_time_state *state = tevent_req_data(
 895                 req, struct fetch_write_time_state);
 896         struct timespec write_time;
 897         struct share_mode_lock *lck = NULL;
 898         NTSTATUS status;
 899         size_t off;
 900
 901         status = fetch_share_mode_recv(subreq, state, &lck);
 902         TALLOC_FREE(subreq);
 903         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
 904                 tevent_req_done(req);
 905                 return;
 906         }
 907         if (!NT_STATUS_IS_OK(status)) {
 908                 tevent_req_nterror(req, status);
 909                 return;
 910         }
 911
 912         write_time = get_share_mode_write_time(lck);
 913         TALLOC_FREE(lck);
 914
 915         if (null_timespec(write_time)) {
 916                 tevent_req_done(req);
 917                 return;
 918         }
 919
 920         switch (state->info_level) {
 921         case SMB_FIND_FILE_DIRECTORY_INFO:
 922         case SMB_FIND_FILE_FULL_DIRECTORY_INFO:
 923         case SMB_FIND_FILE_BOTH_DIRECTORY_INFO:
 924         case SMB_FIND_ID_FULL_DIRECTORY_INFO:
 925         case SMB_FIND_ID_BOTH_DIRECTORY_INFO:
 926                 off = 24;
 927                 break;
 928
 929         default:
 930                 DBG_ERR("Unsupported info_level [%d]\n", state->info_level);
 931                 tevent_req_nterror(req, NT_STATUS_INVALID_LEVEL);
 932                 return;
 933         }
 934
 935         put_long_date_timespec(state->conn->ts_res,
 936                                state->entry_marshall_buf + off,
 937                                write_time);
 938
 939         tevent_req_done(req);
 940         return;
 941 }
 942
 943 static NTSTATUS fetch_write_time_recv(struct tevent_req *req)
 944 {
 945         NTSTATUS status;
 946
 947         if (tevent_req_is_nterror(req, &status)) {
 948                 tevent_req_received(req);
 949                 return status;
 950         }
 951
 952         tevent_req_received(req);
 953         return NT_STATUS_OK;
 954 }
 955
 956 struct fetch_dos_mode_state {
 957         struct files_struct *dir_fsp;
 958         struct smb_filename *smb_fname;
 959         uint32_t info_level;
 960         uint8_t *entry_marshall_buf;
 961 };
 962
 963 static void fetch_dos_mode_done(struct tevent_req *subreq);
 964
 965 static struct tevent_req *fetch_dos_mode_send(
 966                         TALLOC_CTX *mem_ctx,
 967                         struct smb_vfs_ev_glue *evg,
 968                         struct files_struct *dir_fsp,
 969                         struct smb_filename **smb_fname,
 970                         uint32_t info_level,
 971                         uint8_t *entry_marshall_buf)
 972 {
 973         struct tevent_context *ev = smb_vfs_ev_glue_ev_ctx(evg);
 974         struct tevent_req *req = NULL;
 975         struct fetch_dos_mode_state *state = NULL;
 976         struct tevent_req *subreq = NULL;
 977
 978         req = tevent_req_create(mem_ctx, &state, struct fetch_dos_mode_state);
 979         if (req == NULL) {
 980                 return NULL;
 981         }
 982         *state = (struct fetch_dos_mode_state) {
 983                 .dir_fsp = dir_fsp,
 984                 .info_level = info_level,
 985                 .entry_marshall_buf = entry_marshall_buf,
 986         };
 987
 988         state->smb_fname = talloc_move(state, smb_fname);
 989
 990         subreq = dos_mode_at_send(state, evg, dir_fsp, state->smb_fname);
 991         if (tevent_req_nomem(subreq, req)) {
 992                 return tevent_req_post(req, ev);
 993         }
 994         tevent_req_set_callback(subreq, fetch_dos_mode_done, req);
 995
 996         return req;
 997 }
 998
 999 static void fetch_dos_mode_done(struct tevent_req *subreq)
1000 {
1001         struct tevent_req *req =
1002                 tevent_req_callback_data(subreq,
1003                 struct tevent_req);
1004         struct fetch_dos_mode_state *state =
1005                 tevent_req_data(req,
1006                 struct fetch_dos_mode_state);
1007         uint32_t dfs_dosmode;
1008         uint32_t dosmode;
1009         struct timespec btime_ts = {0};
1010         off_t dosmode_off;
1011         off_t btime_off;
1012         NTSTATUS status;
1013
1014         status = dos_mode_at_recv(subreq, &dosmode);
1015         TALLOC_FREE(subreq);
1016         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
1017                 tevent_req_done(req);
1018                 return;
1019         }
1020         if (!NT_STATUS_IS_OK(status)) {
1021                 tevent_req_nterror(req, status);
1022                 return;
1023         }
1024
1025         switch (state->info_level) {
1026         case SMB_FIND_ID_BOTH_DIRECTORY_INFO:
1027         case SMB_FIND_FILE_BOTH_DIRECTORY_INFO:
1028         case SMB_FIND_FILE_DIRECTORY_INFO:
1029         case SMB_FIND_FILE_FULL_DIRECTORY_INFO:
1030         case SMB_FIND_ID_FULL_DIRECTORY_INFO:
1031                 btime_off = 8;
1032                 dosmode_off = 56;
1033                 break;
1034
1035         default:
1036                 DBG_ERR("Unsupported info_level [%u]\n", state->info_level);
1037                 tevent_req_nterror(req, NT_STATUS_INVALID_LEVEL);
1038                 return;
1039         }
1040
1041
1042         dfs_dosmode = IVAL(state->entry_marshall_buf, dosmode_off);
1043         if (dfs_dosmode == 0) {
1044                 /*
1045                  * DOS mode for a DFS link, only overwrite if still set to 0 and
1046                  * not already populated by the lower layer for a DFS link in
1047                  * smbd_dirptr_lanman2_mode_fn().
1048                  */
1049                 SIVAL(state->entry_marshall_buf, dosmode_off, dosmode);
1050         }
1051
1052         btime_ts = get_create_timespec(state->dir_fsp->conn,
1053                                        NULL,
1054                                        state->smb_fname);
1055         if (lp_dos_filetime_resolution(SNUM(state->dir_fsp->conn))) {
1056                 dos_filetime_timespec(&btime_ts);
1057         }
1058
1059         put_long_date_timespec(state->dir_fsp->conn->ts_res,
1060                                (char *)state->entry_marshall_buf + btime_off,
1061                                btime_ts);
1062
1063         tevent_req_done(req);
1064         return;
1065 }
1066
1067 static NTSTATUS fetch_dos_mode_recv(struct tevent_req *req)
1068 {
1069         NTSTATUS status;
1070
1071         if (tevent_req_is_nterror(req, &status)) {
1072                 tevent_req_received(req);
1073                 return status;
1074         }
1075
1076         tevent_req_received(req);
1077         return NT_STATUS_OK;
1078 }