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->sconn->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 tevent_context *ev,
 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 tevent_context *ev;
 221         struct smbd_smb2_request *smb2req;
 222         uint64_t async_sharemode_count;
 223         uint32_t find_async_delay_usec;
 224         DATA_BLOB out_output_buffer;
 225         struct smb_request *smbreq;
 226         int in_output_buffer_length;
 227         struct files_struct *fsp;
 228         const char *in_file_name;
 229         NTSTATUS empty_status;
 230         uint32_t info_level;
 231         uint32_t max_count;
 232         char *pdata;
 233         char *base_data;
 234         char *end_data;
 235         uint32_t num;
 236         uint32_t dirtype;
 237         bool dont_descend;
 238         bool ask_sharemode;
 239         bool async_dosmode;
 240         bool async_ask_sharemode;
 241         int last_entry_off;
 242         size_t max_async_dosmode_active;
 243         uint32_t async_dosmode_active;
 244         bool done;
 245 };
 246
 247 static bool smb2_query_directory_next_entry(struct tevent_req *req);
 248 static void smb2_query_directory_fetch_write_time_done(struct tevent_req *subreq);
 249 static void smb2_query_directory_dos_mode_done(struct tevent_req *subreq);
 250 static void smb2_query_directory_waited(struct tevent_req *subreq);
 251
 252 static struct tevent_req *smbd_smb2_query_directory_send(TALLOC_CTX *mem_ctx,
 253                                               struct tevent_context *ev,
 254                                               struct smbd_smb2_request *smb2req,
 255                                               struct files_struct *fsp,
 256                                               uint8_t in_file_info_class,
 257                                               uint8_t in_flags,
 258                                               uint32_t in_file_index,
 259                                               uint32_t in_output_buffer_length,
 260                                               const char *in_file_name)
 261 {
 262         struct smbXsrv_connection *xconn = smb2req->xconn;
 263         struct tevent_req *req;
 264         struct smbd_smb2_query_directory_state *state;
 265         connection_struct *conn = smb2req->tcon->compat;
 266         NTSTATUS status;
 267         bool wcard_has_wild = false;
 268         struct tm tm;
 269         char *p;
 270         bool stop = false;
 271         bool ok;
 272
 273         req = tevent_req_create(mem_ctx, &state,
 274                                 struct smbd_smb2_query_directory_state);
 275         if (req == NULL) {
 276                 return NULL;
 277         }
 278         state->ev = ev;
 279         state->fsp = fsp;
 280         state->smb2req = smb2req;
 281         state->in_output_buffer_length = in_output_buffer_length;
 282         state->in_file_name = in_file_name;
 283         state->out_output_buffer = data_blob_null;
 284         state->dirtype = FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM | FILE_ATTRIBUTE_DIRECTORY;
 285
 286         DEBUG(10,("smbd_smb2_query_directory_send: %s - %s\n",
 287                   fsp_str_dbg(fsp), fsp_fnum_dbg(fsp)));
 288
 289         state->smbreq = smbd_smb2_fake_smb_request(smb2req);
 290         if (tevent_req_nomem(state->smbreq, req)) {
 291                 return tevent_req_post(req, ev);
 292         }
 293
 294         if (!fsp->is_directory) {
 295                 tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
 296                 return tevent_req_post(req, ev);
 297         }
 298
 299         if (strcmp(state->in_file_name, "") == 0) {
 300                 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_INVALID);
 301                 return tevent_req_post(req, ev);
 302         }
 303         if (strchr_m(state->in_file_name, '\\') != NULL) {
 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
 312         p = strptime(state->in_file_name, GMT_FORMAT, &tm);
 313         if ((p != NULL) && (*p =='\0')) {
 314                 /*
 315                  * Bogus find that asks for a shadow copy timestamp as a
 316                  * directory. The correct response is that it does not exist as
 317                  * a directory.
 318                  */
 319                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_FILE);
 320                 return tevent_req_post(req, ev);
 321         }
 322
 323         if (in_output_buffer_length > xconn->smb2.server.max_trans) {
 324                 DEBUG(2,("smbd_smb2_query_directory_send: "
 325                          "client ignored max trans:%s: 0x%08X: 0x%08X\n",
 326                          __location__, in_output_buffer_length,
 327                          xconn->smb2.server.max_trans));
 328                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 329                 return tevent_req_post(req, ev);
 330         }
 331
 332         status = smbd_smb2_request_verify_creditcharge(smb2req,
 333                                         in_output_buffer_length);
 334
 335         if (!NT_STATUS_IS_OK(status)) {
 336                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 337                 return tevent_req_post(req, ev);
 338         }
 339
 340         switch (in_file_info_class) {
 341         case SMB2_FIND_DIRECTORY_INFO:
 342                 state->info_level = SMB_FIND_FILE_DIRECTORY_INFO;
 343                 break;
 344
 345         case SMB2_FIND_FULL_DIRECTORY_INFO:
 346                 state->info_level = SMB_FIND_FILE_FULL_DIRECTORY_INFO;
 347                 break;
 348
 349         case SMB2_FIND_BOTH_DIRECTORY_INFO:
 350                 state->info_level = SMB_FIND_FILE_BOTH_DIRECTORY_INFO;
 351                 break;
 352
 353         case SMB2_FIND_NAME_INFO:
 354                 state->info_level = SMB_FIND_FILE_NAMES_INFO;
 355                 break;
 356
 357         case SMB2_FIND_ID_BOTH_DIRECTORY_INFO:
 358                 state->info_level = SMB_FIND_ID_BOTH_DIRECTORY_INFO;
 359                 break;
 360
 361         case SMB2_FIND_ID_FULL_DIRECTORY_INFO:
 362                 state->info_level = SMB_FIND_ID_FULL_DIRECTORY_INFO;
 363                 break;
 364
 365         default:
 366                 tevent_req_nterror(req, NT_STATUS_INVALID_INFO_CLASS);
 367                 return tevent_req_post(req, ev);
 368         }
 369
 370         if (in_flags & SMB2_CONTINUE_FLAG_REOPEN) {
 371                 int flags;
 372
 373                 status = fd_close(fsp);
 374                 if (tevent_req_nterror(req, status)) {
 375                         return tevent_req_post(req, ev);
 376                 }
 377
 378                 /*
 379                  * fd_close() will close and invalidate the fsp's file
 380                  * descriptor. So we have to reopen it.
 381                  */
 382
 383                 flags = O_RDONLY;
 384 #ifdef O_DIRECTORY
 385                 flags |= O_DIRECTORY;
 386 #endif
 387                 status = fd_open(conn, fsp, flags, 0);
 388                 if (tevent_req_nterror(req, status)) {
 389                         return tevent_req_post(req, ev);
 390                 }
 391         }
 392
 393         if (!state->smbreq->posix_pathnames) {
 394                 wcard_has_wild = ms_has_wild(state->in_file_name);
 395         }
 396
 397         /* Ensure we've canonicalized any search path if not a wildcard. */
 398         if (!wcard_has_wild) {
 399                 struct smb_filename *smb_fname = NULL;
 400                 const char *fullpath;
 401                 char tmpbuf[PATH_MAX];
 402                 char *to_free = NULL;
 403                 uint32_t ucf_flags = UCF_SAVE_LCOMP |
 404                                      UCF_ALWAYS_ALLOW_WCARD_LCOMP |
 405                                      (state->smbreq->posix_pathnames ?
 406                                         UCF_POSIX_PATHNAMES : 0);
 407
 408                 if (ISDOT(fsp->fsp_name->base_name)) {
 409                         fullpath = state->in_file_name;
 410                 } else {
 411                         size_t len;
 412                         char *tmp;
 413
 414                         len = full_path_tos(
 415                                 fsp->fsp_name->base_name, state->in_file_name,
 416                                 tmpbuf, sizeof(tmpbuf), &tmp, &to_free);
 417                         if (len == -1) {
 418                                 tevent_req_oom(req);
 419                                 return tevent_req_post(req, ev);
 420                         }
 421                         fullpath = tmp;
 422                 }
 423                 status = filename_convert(state,
 424                                 conn,
 425                                 fullpath,
 426                                 ucf_flags,
 427                                 NULL,
 428                                 &wcard_has_wild,
 429                                 &smb_fname);
 430
 431                 TALLOC_FREE(to_free);
 432
 433                 if (tevent_req_nterror(req, status)) {
 434                         return tevent_req_post(req, ev);
 435                 }
 436
 437                 state->in_file_name = smb_fname->original_lcomp;
 438         }
 439
 440         if (fsp->dptr == NULL) {
 441                 status = dptr_create(conn,
 442                                      NULL, /* req */
 443                                      fsp,
 444                                      fsp->fsp_name,
 445                                      false, /* old_handle */
 446                                      false, /* expect_close */
 447                                      0, /* spid */
 448                                      state->in_file_name, /* wcard */
 449                                      wcard_has_wild,
 450                                      state->dirtype,
 451                                      &fsp->dptr);
 452                 if (!NT_STATUS_IS_OK(status)) {
 453                         tevent_req_nterror(req, status);
 454                         return tevent_req_post(req, ev);
 455                 }
 456
 457                 state->empty_status = NT_STATUS_NO_SUCH_FILE;
 458         } else {
 459                 state->empty_status = STATUS_NO_MORE_FILES;
 460         }
 461
 462         if (in_flags & SMB2_CONTINUE_FLAG_RESTART) {
 463                 dptr_SeekDir(fsp->dptr, 0);
 464         }
 465
 466         if (in_flags & SMB2_CONTINUE_FLAG_SINGLE) {
 467                 state->max_count = 1;
 468         } else {
 469                 state->max_count = UINT16_MAX;
 470         }
 471
 472 #define DIR_ENTRY_SAFETY_MARGIN 4096
 473
 474         state->out_output_buffer = data_blob_talloc(state, NULL,
 475                         in_output_buffer_length + DIR_ENTRY_SAFETY_MARGIN);
 476         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 477                 return tevent_req_post(req, ev);
 478         }
 479
 480         state->out_output_buffer.length = 0;
 481         state->pdata = (char *)state->out_output_buffer.data;
 482         state->base_data = state->pdata;
 483         /*
 484          * end_data must include the safety margin as it's what is
 485          * used to determine if pushed strings have been truncated.
 486          */
 487         state->end_data = state->pdata + in_output_buffer_length + DIR_ENTRY_SAFETY_MARGIN - 1;
 488
 489         DEBUG(8,("smbd_smb2_query_directory_send: dirpath=<%s> dontdescend=<%s>, "
 490                 "in_output_buffer_length = %u\n",
 491                 fsp->fsp_name->base_name, lp_dont_descend(talloc_tos(), SNUM(conn)),
 492                 (unsigned int)in_output_buffer_length ));
 493         if (in_list(fsp->fsp_name->base_name,lp_dont_descend(talloc_tos(), SNUM(conn)),
 494                         conn->case_sensitive)) {
 495                 state->dont_descend = true;
 496         }
 497
 498         /*
 499          * SMB_FIND_FILE_NAMES_INFO doesn't need stat information
 500          *
 501          * This may change when we try to improve the delete on close
 502          * handling in future.
 503          */
 504         if (state->info_level != SMB_FIND_FILE_NAMES_INFO) {
 505                 state->ask_sharemode = lp_smbd_search_ask_sharemode(SNUM(conn));
 506
 507                 state->async_dosmode = lp_smbd_async_dosmode(SNUM(conn));
 508         }
 509
 510         if (state->ask_sharemode && lp_clustering()) {
 511                 state->ask_sharemode = false;
 512                 state->async_ask_sharemode = true;
 513         }
 514
 515         if (state->async_dosmode) {
 516                 size_t max_threads;
 517
 518                 max_threads = pthreadpool_tevent_max_threads(conn->sconn->pool);
 519                 if (max_threads == 0 || !per_thread_cwd_supported()) {
 520                         state->async_dosmode = false;
 521                 }
 522
 523                 state->max_async_dosmode_active = lp_smbd_max_async_dosmode(
 524                                                         SNUM(conn));
 525                 if (state->max_async_dosmode_active == 0) {
 526                         state->max_async_dosmode_active = max_threads * 2;
 527                 }
 528         }
 529
 530         if (state->async_dosmode || state->async_ask_sharemode) {
 531                 /*
 532                  * Should we only set async_internal
 533                  * if we're not the last request in
 534                  * a compound chain?
 535                  */
 536                 smb2_request_set_async_internal(smb2req, true);
 537         }
 538
 539         /*
 540          * This gets set in autobuild for some tests
 541          */
 542         state->find_async_delay_usec = lp_parm_ulong(SNUM(conn), "smbd",
 543                                                      "find async delay usec",
 544                                                      0);
 545
 546         while (!stop) {
 547                 stop = smb2_query_directory_next_entry(req);
 548         }
 549
 550         if (!tevent_req_is_in_progress(req)) {
 551                 return tevent_req_post(req, ev);
 552         }
 553
 554         ok = aio_add_req_to_fsp(fsp, req);
 555         if (!ok) {
 556                 DBG_ERR("Could not add req to fsp\n");
 557                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 558                 return tevent_req_post(req, ev);
 559         }
 560
 561         return req;
 562 }
 563
 564 static bool smb2_query_directory_next_entry(struct tevent_req *req)
 565 {
 566         struct smbd_smb2_query_directory_state *state = tevent_req_data(
 567                 req, struct smbd_smb2_query_directory_state);
 568         struct smb_filename *smb_fname = NULL; /* relative to fsp !! */
 569         bool got_exact_match = false;
 570         int off = state->out_output_buffer.length;
 571         int space_remaining = state->in_output_buffer_length - off;
 572         struct file_id file_id;
 573         NTSTATUS status;
 574         bool get_dosmode = !state->async_dosmode;
 575         bool stop = false;
 576
 577         SMB_ASSERT(space_remaining >= 0);
 578
 579         status = smbd_dirptr_lanman2_entry(state,
 580                                            state->fsp->conn,
 581                                            state->fsp->dptr,
 582                                            state->smbreq->flags2,
 583                                            state->in_file_name,
 584                                            state->dirtype,
 585                                            state->info_level,
 586                                            false, /* requires_resume_key */
 587                                            state->dont_descend,
 588                                            state->ask_sharemode,
 589                                            get_dosmode,
 590                                            8, /* align to 8 bytes */
 591                                            false, /* no padding */
 592                                            &state->pdata,
 593                                            state->base_data,
 594                                            state->end_data,
 595                                            space_remaining,
 596                                            &smb_fname,
 597                                            &got_exact_match,
 598                                            &state->last_entry_off,
 599                                            NULL,
 600                                            &file_id);
 601
 602         off = (int)PTR_DIFF(state->pdata, state->base_data);
 603
 604         if (!NT_STATUS_IS_OK(status)) {
 605                 if (NT_STATUS_EQUAL(status, NT_STATUS_ILLEGAL_CHARACTER)) {
 606                         /*
 607                          * Bad character conversion on name. Ignore this
 608                          * entry.
 609                          */
 610                         return false;
 611                 } else if (state->num > 0) {
 612                         goto last_entry_done;
 613                 } else if (NT_STATUS_EQUAL(status, STATUS_MORE_ENTRIES)) {
 614                         tevent_req_nterror(req, NT_STATUS_INFO_LENGTH_MISMATCH);
 615                         return true;
 616                 } else {
 617                         tevent_req_nterror(req, state->empty_status);
 618                         return true;
 619                 }
 620         }
 621
 622         if (state->async_ask_sharemode) {
 623                 struct tevent_req *subreq = NULL;
 624                 char *buf = state->base_data + state->last_entry_off;
 625
 626                 subreq = fetch_write_time_send(state,
 627                                                state->ev,
 628                                                state->fsp->conn,
 629                                                file_id,
 630                                                state->info_level,
 631                                                buf,
 632                                                &stop);
 633                 if (tevent_req_nomem(subreq, req)) {
 634                         return true;
 635                 }
 636                 tevent_req_set_callback(
 637                         subreq,
 638                         smb2_query_directory_fetch_write_time_done,
 639                         req);
 640                 state->async_sharemode_count++;
 641         }
 642
 643         if (state->async_dosmode) {
 644                 struct tevent_req *subreq = NULL;
 645                 uint8_t *buf = NULL;
 646                 size_t outstanding_aio;
 647
 648                 buf = (uint8_t *)state->base_data + state->last_entry_off;
 649
 650                 subreq = fetch_dos_mode_send(state,
 651                                              state->ev,
 652                                              state->fsp,
 653                                              &smb_fname,
 654                                              state->info_level,
 655                                              buf);
 656                 if (tevent_req_nomem(subreq, req)) {
 657                         return true;
 658                 }
 659                 tevent_req_set_callback(subreq,
 660                                         smb2_query_directory_dos_mode_done,
 661                                         req);
 662
 663                 state->async_dosmode_active++;
 664
 665                 outstanding_aio = pthreadpool_tevent_queued_jobs(
 666                                         state->fsp->conn->sconn->pool);
 667
 668                 if (outstanding_aio > state->max_async_dosmode_active) {
 669                         stop = true;
 670                 }
 671         }
 672
 673         TALLOC_FREE(smb_fname);
 674
 675         state->num++;
 676         state->out_output_buffer.length = off;
 677
 678         if (!state->done && state->num < state->max_count) {
 679                 return stop;
 680         }
 681
 682 last_entry_done:
 683         SIVAL(state->out_output_buffer.data, state->last_entry_off, 0);
 684
 685         state->done = true;
 686
 687         if (state->async_sharemode_count > 0) {
 688                 DBG_DEBUG("Stopping after %"PRIu64" async mtime "
 689                           "updates\n", state->async_sharemode_count);
 690                 return true;
 691         }
 692
 693         if (state->async_dosmode_active > 0) {
 694                 return true;
 695         }
 696
 697         if (state->find_async_delay_usec > 0) {
 698                 struct timeval tv;
 699                 struct tevent_req *subreq = NULL;
 700
 701                 /*
 702                  * Should we only set async_internal
 703                  * if we're not the last request in
 704                  * a compound chain?
 705                  */
 706                 smb2_request_set_async_internal(state->smb2req, true);
 707
 708                 tv = timeval_current_ofs(0, state->find_async_delay_usec);
 709
 710                 subreq = tevent_wakeup_send(state, state->ev, tv);
 711                 if (tevent_req_nomem(subreq, req)) {
 712                         return true;
 713                 }
 714                 tevent_req_set_callback(subreq,
 715                                         smb2_query_directory_waited,
 716                                         req);
 717                 return true;
 718         }
 719
 720         tevent_req_done(req);
 721         return true;
 722 }
 723
 724 static void smb2_query_directory_check_next_entry(struct tevent_req *req);
 725
 726 static void smb2_query_directory_fetch_write_time_done(struct tevent_req *subreq)
 727 {
 728         struct tevent_req *req = tevent_req_callback_data(
 729                 subreq, struct tevent_req);
 730         struct smbd_smb2_query_directory_state *state = tevent_req_data(
 731                 req, struct smbd_smb2_query_directory_state);
 732         NTSTATUS status;
 733
 734         state->async_sharemode_count--;
 735
 736         status = fetch_write_time_recv(subreq);
 737         TALLOC_FREE(subreq);
 738         if (tevent_req_nterror(req, status)) {
 739                 return;
 740         }
 741
 742         smb2_query_directory_check_next_entry(req);
 743         return;
 744 }
 745
 746 static void smb2_query_directory_dos_mode_done(struct tevent_req *subreq)
 747 {
 748         struct tevent_req *req =
 749                 tevent_req_callback_data(subreq,
 750                 struct tevent_req);
 751         struct smbd_smb2_query_directory_state *state =
 752                 tevent_req_data(req,
 753                 struct smbd_smb2_query_directory_state);
 754         NTSTATUS status;
 755         bool ok;
 756
 757         /*
 758          * Make sure we run as the user again
 759          */
 760         ok = change_to_user_by_fsp(state->fsp);
 761         SMB_ASSERT(ok);
 762
 763         status = fetch_dos_mode_recv(subreq);
 764         TALLOC_FREE(subreq);
 765         if (tevent_req_nterror(req, status)) {
 766                 return;
 767         }
 768
 769         state->async_dosmode_active--;
 770
 771         smb2_query_directory_check_next_entry(req);
 772         return;
 773 }
 774
 775 static void smb2_query_directory_check_next_entry(struct tevent_req *req)
 776 {
 777         struct smbd_smb2_query_directory_state *state = tevent_req_data(
 778                 req, struct smbd_smb2_query_directory_state);
 779         bool stop = false;
 780
 781         if (!state->done) {
 782                 while (!stop) {
 783                         stop = smb2_query_directory_next_entry(req);
 784                 }
 785                 return;
 786         }
 787
 788         if (state->async_sharemode_count > 0 ||
 789             state->async_dosmode_active > 0)
 790         {
 791                 return;
 792         }
 793
 794         if (state->find_async_delay_usec > 0) {
 795                 struct timeval tv;
 796                 struct tevent_req *subreq = NULL;
 797
 798                 tv = timeval_current_ofs(0, state->find_async_delay_usec);
 799
 800                 subreq = tevent_wakeup_send(state, state->ev, tv);
 801                 if (tevent_req_nomem(subreq, req)) {
 802                         tevent_req_post(req, state->ev);
 803                         return;
 804                 }
 805                 tevent_req_set_callback(subreq,
 806                                         smb2_query_directory_waited,
 807                                         req);
 808                 return;
 809         }
 810
 811         tevent_req_done(req);
 812         return;
 813 }
 814
 815 static void smb2_query_directory_waited(struct tevent_req *subreq)
 816 {
 817         struct tevent_req *req = tevent_req_callback_data(
 818                 subreq, struct tevent_req);
 819         bool ok;
 820
 821         ok = tevent_wakeup_recv(subreq);
 822         TALLOC_FREE(subreq);
 823         if (!ok) {
 824                 tevent_req_oom(req);
 825                 return;
 826         }
 827         tevent_req_done(req);
 828 }
 829
 830 static NTSTATUS smbd_smb2_query_directory_recv(struct tevent_req *req,
 831                                     TALLOC_CTX *mem_ctx,
 832                                     DATA_BLOB *out_output_buffer)
 833 {
 834         NTSTATUS status;
 835         struct smbd_smb2_query_directory_state *state = tevent_req_data(req,
 836                                              struct smbd_smb2_query_directory_state);
 837
 838         if (tevent_req_is_nterror(req, &status)) {
 839                 tevent_req_received(req);
 840                 return status;
 841         }
 842
 843         *out_output_buffer = state->out_output_buffer;
 844         talloc_steal(mem_ctx, out_output_buffer->data);
 845
 846         tevent_req_received(req);
 847         return NT_STATUS_OK;
 848 }
 849
 850 struct fetch_write_time_state {
 851         connection_struct *conn;
 852         struct file_id id;
 853         int info_level;
 854         char *entry_marshall_buf;
 855 };
 856
 857 static void fetch_write_time_done(struct tevent_req *subreq);
 858
 859 static struct tevent_req *fetch_write_time_send(TALLOC_CTX *mem_ctx,
 860                                                 struct tevent_context *ev,
 861                                                 connection_struct *conn,
 862                                                 struct file_id id,
 863                                                 int info_level,
 864                                                 char *entry_marshall_buf,
 865                                                 bool *stop)
 866 {
 867         struct tevent_req *req = NULL;
 868         struct fetch_write_time_state *state = NULL;
 869         struct tevent_req *subreq = NULL;
 870         bool req_queued;
 871
 872         *stop = false;
 873
 874         req = tevent_req_create(mem_ctx, &state, struct fetch_write_time_state);
 875         if (req == NULL) {
 876                 return NULL;
 877         }
 878
 879         *state = (struct fetch_write_time_state) {
 880                 .conn = conn,
 881                 .id = id,
 882                 .info_level = info_level,
 883                 .entry_marshall_buf = entry_marshall_buf,
 884         };
 885
 886         subreq = fetch_share_mode_send(state, ev, id, &req_queued);
 887         if (tevent_req_nomem(subreq, req)) {
 888                 return tevent_req_post(req, ev);
 889         }
 890         tevent_req_set_callback(subreq, fetch_write_time_done, req);
 891
 892         if (req_queued) {
 893                 *stop = true;
 894         }
 895         return req;
 896 }
 897
 898 static void fetch_write_time_done(struct tevent_req *subreq)
 899 {
 900         struct tevent_req *req = tevent_req_callback_data(
 901                 subreq, struct tevent_req);
 902         struct fetch_write_time_state *state = tevent_req_data(
 903                 req, struct fetch_write_time_state);
 904         struct timespec write_time;
 905         struct share_mode_lock *lck = NULL;
 906         NTSTATUS status;
 907         size_t off;
 908
 909         status = fetch_share_mode_recv(subreq, state, &lck);
 910         TALLOC_FREE(subreq);
 911         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
 912                 tevent_req_done(req);
 913                 return;
 914         }
 915         if (!NT_STATUS_IS_OK(status)) {
 916                 tevent_req_nterror(req, status);
 917                 return;
 918         }
 919
 920         write_time = get_share_mode_write_time(lck);
 921         TALLOC_FREE(lck);
 922
 923         if (null_timespec(write_time)) {
 924                 tevent_req_done(req);
 925                 return;
 926         }
 927
 928         switch (state->info_level) {
 929         case SMB_FIND_FILE_DIRECTORY_INFO:
 930         case SMB_FIND_FILE_FULL_DIRECTORY_INFO:
 931         case SMB_FIND_FILE_BOTH_DIRECTORY_INFO:
 932         case SMB_FIND_ID_FULL_DIRECTORY_INFO:
 933         case SMB_FIND_ID_BOTH_DIRECTORY_INFO:
 934                 off = 24;
 935                 break;
 936
 937         default:
 938                 DBG_ERR("Unsupported info_level [%d]\n", state->info_level);
 939                 tevent_req_nterror(req, NT_STATUS_INVALID_LEVEL);
 940                 return;
 941         }
 942
 943         put_long_date_timespec(state->conn->ts_res,
 944                                state->entry_marshall_buf + off,
 945                                write_time);
 946
 947         tevent_req_done(req);
 948         return;
 949 }
 950
 951 static NTSTATUS fetch_write_time_recv(struct tevent_req *req)
 952 {
 953         NTSTATUS status;
 954
 955         if (tevent_req_is_nterror(req, &status)) {
 956                 tevent_req_received(req);
 957                 return status;
 958         }
 959
 960         tevent_req_received(req);
 961         return NT_STATUS_OK;
 962 }
 963
 964 struct fetch_dos_mode_state {
 965         struct files_struct *dir_fsp;
 966         struct smb_filename *smb_fname;
 967         uint32_t info_level;
 968         uint8_t *entry_marshall_buf;
 969 };
 970
 971 static void fetch_dos_mode_done(struct tevent_req *subreq);
 972
 973 static struct tevent_req *fetch_dos_mode_send(
 974                         TALLOC_CTX *mem_ctx,
 975                         struct tevent_context *ev,
 976                         struct files_struct *dir_fsp,
 977                         struct smb_filename **smb_fname,
 978                         uint32_t info_level,
 979                         uint8_t *entry_marshall_buf)
 980 {
 981         struct tevent_req *req = NULL;
 982         struct fetch_dos_mode_state *state = NULL;
 983         struct tevent_req *subreq = NULL;
 984
 985         req = tevent_req_create(mem_ctx, &state, struct fetch_dos_mode_state);
 986         if (req == NULL) {
 987                 return NULL;
 988         }
 989         *state = (struct fetch_dos_mode_state) {
 990                 .dir_fsp = dir_fsp,
 991                 .info_level = info_level,
 992                 .entry_marshall_buf = entry_marshall_buf,
 993         };
 994
 995         state->smb_fname = talloc_move(state, smb_fname);
 996
 997         subreq = dos_mode_at_send(state, ev, dir_fsp, state->smb_fname);
 998         if (tevent_req_nomem(subreq, req)) {
 999                 return tevent_req_post(req, ev);
1000         }
1001         tevent_req_set_callback(subreq, fetch_dos_mode_done, req);
1002
1003         return req;
1004 }
1005
1006 static void fetch_dos_mode_done(struct tevent_req *subreq)
1007 {
1008         struct tevent_req *req =
1009                 tevent_req_callback_data(subreq,
1010                 struct tevent_req);
1011         struct fetch_dos_mode_state *state =
1012                 tevent_req_data(req,
1013                 struct fetch_dos_mode_state);
1014         uint32_t dfs_dosmode;
1015         uint32_t dosmode;
1016         struct timespec btime_ts = {0};
1017         off_t dosmode_off;
1018         off_t btime_off;
1019         NTSTATUS status;
1020
1021         status = dos_mode_at_recv(subreq, &dosmode);
1022         TALLOC_FREE(subreq);
1023         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
1024                 tevent_req_done(req);
1025                 return;
1026         }
1027         if (!NT_STATUS_IS_OK(status)) {
1028                 tevent_req_nterror(req, status);
1029                 return;
1030         }
1031
1032         switch (state->info_level) {
1033         case SMB_FIND_ID_BOTH_DIRECTORY_INFO:
1034         case SMB_FIND_FILE_BOTH_DIRECTORY_INFO:
1035         case SMB_FIND_FILE_DIRECTORY_INFO:
1036         case SMB_FIND_FILE_FULL_DIRECTORY_INFO:
1037         case SMB_FIND_ID_FULL_DIRECTORY_INFO:
1038                 btime_off = 8;
1039                 dosmode_off = 56;
1040                 break;
1041
1042         default:
1043                 DBG_ERR("Unsupported info_level [%u]\n", state->info_level);
1044                 tevent_req_nterror(req, NT_STATUS_INVALID_LEVEL);
1045                 return;
1046         }
1047
1048
1049         dfs_dosmode = IVAL(state->entry_marshall_buf, dosmode_off);
1050         if (dfs_dosmode == 0) {
1051                 /*
1052                  * DOS mode for a DFS link, only overwrite if still set to 0 and
1053                  * not already populated by the lower layer for a DFS link in
1054                  * smbd_dirptr_lanman2_mode_fn().
1055                  */
1056                 SIVAL(state->entry_marshall_buf, dosmode_off, dosmode);
1057         }
1058
1059         btime_ts = get_create_timespec(state->dir_fsp->conn,
1060                                        NULL,
1061                                        state->smb_fname);
1062         if (lp_dos_filetime_resolution(SNUM(state->dir_fsp->conn))) {
1063                 dos_filetime_timespec(&btime_ts);
1064         }
1065
1066         put_long_date_timespec(state->dir_fsp->conn->ts_res,
1067                                (char *)state->entry_marshall_buf + btime_off,
1068                                btime_ts);
1069
1070         tevent_req_done(req);
1071         return;
1072 }
1073
1074 static NTSTATUS fetch_dos_mode_recv(struct tevent_req *req)
1075 {
1076         NTSTATUS status;
1077
1078         if (tevent_req_is_nterror(req, &status)) {
1079                 tevent_req_received(req);
1080                 return status;
1081         }
1082
1083         tevent_req_received(req);
1084         return NT_STATUS_OK;
1085 }