source3/smbd/close.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    file closing
   4    Copyright (C) Andrew Tridgell 1992-1998
   5    Copyright (C) Jeremy Allison 1992-2007.
   6    Copyright (C) Volker Lendecke 2005
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "system/filesys.h"
  24 #include "printing.h"
  25 #include "smbd/smbd.h"
  26 #include "smbd/globals.h"
  27 #include "fake_file.h"
  28 #include "transfer_file.h"
  29 #include "auth.h"
  30 #include "messages.h"
  31 #include "../librpc/gen_ndr/open_files.h"
  32
  33 /****************************************************************************
  34  Run a file if it is a magic script.
  35 ****************************************************************************/
  36
  37 static NTSTATUS check_magic(struct files_struct *fsp)
  38 {
  39         int ret;
  40         const char *magic_output = NULL;
  41         SMB_STRUCT_STAT st;
  42         int tmp_fd, outfd;
  43         TALLOC_CTX *ctx = NULL;
  44         const char *p;
  45         struct connection_struct *conn = fsp->conn;
  46         char *fname = NULL;
  47         NTSTATUS status;
  48
  49         if (!*lp_magicscript(SNUM(conn))) {
  50                 return NT_STATUS_OK;
  51         }
  52
  53         DEBUG(5,("checking magic for %s\n", fsp_str_dbg(fsp)));
  54
  55         ctx = talloc_stackframe();
  56
  57         fname = fsp->fsp_name->base_name;
  58
  59         if (!(p = strrchr_m(fname,'/'))) {
  60                 p = fname;
  61         } else {
  62                 p++;
  63         }
  64
  65         if (!strequal(lp_magicscript(SNUM(conn)),p)) {
  66                 status = NT_STATUS_OK;
  67                 goto out;
  68         }
  69
  70         if (*lp_magicoutput(SNUM(conn))) {
  71                 magic_output = lp_magicoutput(SNUM(conn));
  72         } else {
  73                 magic_output = talloc_asprintf(ctx,
  74                                 "%s.out",
  75                                 fname);
  76         }
  77         if (!magic_output) {
  78                 status = NT_STATUS_NO_MEMORY;
  79                 goto out;
  80         }
  81
  82         /* Ensure we don't depend on user's PATH. */
  83         p = talloc_asprintf(ctx, "./%s", fname);
  84         if (!p) {
  85                 status = NT_STATUS_NO_MEMORY;
  86                 goto out;
  87         }
  88
  89         if (chmod(fname, 0755) == -1) {
  90                 status = map_nt_error_from_unix(errno);
  91                 goto out;
  92         }
  93         ret = smbrun(p,&tmp_fd);
  94         DEBUG(3,("Invoking magic command %s gave %d\n",
  95                 p,ret));
  96
  97         unlink(fname);
  98         if (ret != 0 || tmp_fd == -1) {
  99                 if (tmp_fd != -1) {
 100                         close(tmp_fd);
 101                 }
 102                 status = NT_STATUS_UNSUCCESSFUL;
 103                 goto out;
 104         }
 105         outfd = open(magic_output, O_CREAT|O_EXCL|O_RDWR, 0600);
 106         if (outfd == -1) {
 107                 int err = errno;
 108                 close(tmp_fd);
 109                 status = map_nt_error_from_unix(err);
 110                 goto out;
 111         }
 112
 113         if (sys_fstat(tmp_fd, &st, false) == -1) {
 114                 int err = errno;
 115                 close(tmp_fd);
 116                 close(outfd);
 117                 status = map_nt_error_from_unix(err);
 118                 goto out;
 119         }
 120
 121         if (transfer_file(tmp_fd,outfd,(off_t)st.st_ex_size) == (off_t)-1) {
 122                 int err = errno;
 123                 close(tmp_fd);
 124                 close(outfd);
 125                 status = map_nt_error_from_unix(err);
 126                 goto out;
 127         }
 128         close(tmp_fd);
 129         if (close(outfd) == -1) {
 130                 status = map_nt_error_from_unix(errno);
 131                 goto out;
 132         }
 133
 134         status = NT_STATUS_OK;
 135
 136  out:
 137         TALLOC_FREE(ctx);
 138         return status;
 139 }
 140
 141 /****************************************************************************
 142   Common code to close a file or a directory.
 143 ****************************************************************************/
 144
 145 static NTSTATUS close_filestruct(files_struct *fsp)
 146 {
 147         NTSTATUS status = NT_STATUS_OK;
 148
 149         if (fsp->fh->fd != -1) {
 150                 if(flush_write_cache(fsp, CLOSE_FLUSH) == -1) {
 151                         status = map_nt_error_from_unix(errno);
 152                 }
 153                 delete_write_cache(fsp);
 154         }
 155
 156         return status;
 157 }
 158
 159 static int compare_share_mode_times(const void *p1, const void *p2)
 160 {
 161         const struct share_mode_entry *s1 = (const struct share_mode_entry *)p1;
 162         const struct share_mode_entry *s2 = (const struct share_mode_entry *)p2;
 163         return timeval_compare(&s1->time, &s2->time);
 164 }
 165
 166 /****************************************************************************
 167  If any deferred opens are waiting on this close, notify them.
 168 ****************************************************************************/
 169
 170 static void notify_deferred_opens(struct smbd_server_connection *sconn,
 171                                   struct share_mode_lock *lck)
 172 {
 173         uint32_t i, num_deferred;
 174         struct share_mode_entry *deferred;
 175
 176         if (!should_notify_deferred_opens()) {
 177                 return;
 178         }
 179
 180         num_deferred = 0;
 181         for (i=0; i<lck->data->num_share_modes; i++) {
 182                 if (is_deferred_open_entry(&lck->data->share_modes[i])) {
 183                         num_deferred += 1;
 184                 }
 185         }
 186         if (num_deferred == 0) {
 187                 return;
 188         }
 189
 190         deferred = talloc_array(talloc_tos(), struct share_mode_entry,
 191                                 num_deferred);
 192         if (deferred == NULL) {
 193                 return;
 194         }
 195
 196         num_deferred = 0;
 197         for (i=0; i<lck->data->num_share_modes; i++) {
 198                 struct share_mode_entry *e = &lck->data->share_modes[i];
 199                 if (is_deferred_open_entry(e)) {
 200                         deferred[num_deferred] = *e;
 201                         num_deferred += 1;
 202                 }
 203         }
 204
 205         /*
 206          * We need to sort the notifications by initial request time. Imagine
 207          * two opens come in asyncronously, both conflicting with the open we
 208          * just close here. If we don't sort the notifications, the one that
 209          * came in last might get the response before the one that came in
 210          * first. This is demonstrated with the smbtorture4 raw.mux test.
 211          *
 212          * As long as we had the UNUSED_SHARE_MODE_ENTRY, we happened to
 213          * survive this particular test. Without UNUSED_SHARE_MODE_ENTRY, we
 214          * shuffle the share mode entries around a bit, so that we do not
 215          * survive raw.mux anymore.
 216          *
 217          * We could have kept the ordering in del_share_mode, but as the
 218          * ordering was never formalized I think it is better to do it here
 219          * where it is necessary.
 220          */
 221
 222         qsort(deferred, num_deferred, sizeof(struct share_mode_entry),
 223               compare_share_mode_times);
 224
 225         for (i=0; i<num_deferred; i++) {
 226                 struct share_mode_entry *e = &deferred[i];
 227
 228                 if (procid_is_me(&e->pid)) {
 229                         /*
 230                          * We need to notify ourself to retry the open.  Do
 231                          * this by finding the queued SMB record, moving it to
 232                          * the head of the queue and changing the wait time to
 233                          * zero.
 234                          */
 235                         schedule_deferred_open_message_smb(sconn, e->op_mid);
 236                 } else {
 237                         char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
 238
 239                         share_mode_entry_to_message(msg, e);
 240
 241                         messaging_send_buf(sconn->msg_ctx, e->pid,
 242                                            MSG_SMB_OPEN_RETRY,
 243                                            (uint8 *)msg,
 244                                            MSG_SMB_SHARE_MODE_ENTRY_SIZE);
 245                 }
 246         }
 247         TALLOC_FREE(deferred);
 248 }
 249
 250 /****************************************************************************
 251  Delete all streams
 252 ****************************************************************************/
 253
 254 NTSTATUS delete_all_streams(connection_struct *conn, const char *fname)
 255 {
 256         struct stream_struct *stream_info = NULL;
 257         int i;
 258         unsigned int num_streams = 0;
 259         TALLOC_CTX *frame = talloc_stackframe();
 260         NTSTATUS status;
 261
 262         status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
 263                                 &num_streams, &stream_info);
 264
 265         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)) {
 266                 DEBUG(10, ("no streams around\n"));
 267                 TALLOC_FREE(frame);
 268                 return NT_STATUS_OK;
 269         }
 270
 271         if (!NT_STATUS_IS_OK(status)) {
 272                 DEBUG(10, ("vfs_streaminfo failed: %s\n",
 273                            nt_errstr(status)));
 274                 goto fail;
 275         }
 276
 277         DEBUG(10, ("delete_all_streams found %d streams\n",
 278                    num_streams));
 279
 280         if (num_streams == 0) {
 281                 TALLOC_FREE(frame);
 282                 return NT_STATUS_OK;
 283         }
 284
 285         for (i=0; i<num_streams; i++) {
 286                 int res;
 287                 struct smb_filename *smb_fname_stream = NULL;
 288
 289                 if (strequal(stream_info[i].name, "::$DATA")) {
 290                         continue;
 291                 }
 292
 293                 status = create_synthetic_smb_fname(talloc_tos(), fname,
 294                                                     stream_info[i].name, NULL,
 295                                                     &smb_fname_stream);
 296
 297                 if (!NT_STATUS_IS_OK(status)) {
 298                         DEBUG(0, ("talloc_aprintf failed\n"));
 299                         goto fail;
 300                 }
 301
 302                 res = SMB_VFS_UNLINK(conn, smb_fname_stream);
 303
 304                 if (res == -1) {
 305                         status = map_nt_error_from_unix(errno);
 306                         DEBUG(10, ("Could not delete stream %s: %s\n",
 307                                    smb_fname_str_dbg(smb_fname_stream),
 308                                    strerror(errno)));
 309                         TALLOC_FREE(smb_fname_stream);
 310                         break;
 311                 }
 312                 TALLOC_FREE(smb_fname_stream);
 313         }
 314
 315  fail:
 316         TALLOC_FREE(frame);
 317         return status;
 318 }
 319
 320 /****************************************************************************
 321  Deal with removing a share mode on last close.
 322 ****************************************************************************/
 323
 324 static NTSTATUS close_remove_share_mode(files_struct *fsp,
 325                                         enum file_close_type close_type)
 326 {
 327         connection_struct *conn = fsp->conn;
 328         bool delete_file = false;
 329         bool changed_user = false;
 330         struct share_mode_lock *lck = NULL;
 331         NTSTATUS status = NT_STATUS_OK;
 332         NTSTATUS tmp_status;
 333         struct file_id id;
 334         const struct security_unix_token *del_token = NULL;
 335         const struct security_token *del_nt_token = NULL;
 336         bool got_tokens = false;
 337
 338         /* Ensure any pending write time updates are done. */
 339         if (fsp->update_write_time_event) {
 340                 update_write_time_handler(fsp->conn->sconn->ev_ctx,
 341                                         fsp->update_write_time_event,
 342                                         timeval_current(),
 343                                         (void *)fsp);
 344         }
 345
 346         /*
 347          * Lock the share entries, and determine if we should delete
 348          * on close. If so delete whilst the lock is still in effect.
 349          * This prevents race conditions with the file being created. JRA.
 350          */
 351
 352         lck = get_existing_share_mode_lock(talloc_tos(), fsp->file_id);
 353         if (lck == NULL) {
 354                 DEBUG(0, ("close_remove_share_mode: Could not get share mode "
 355                           "lock for file %s\n", fsp_str_dbg(fsp)));
 356                 status = NT_STATUS_INVALID_PARAMETER;
 357                 goto done;
 358         }
 359
 360         if (fsp->write_time_forced) {
 361                 DEBUG(10,("close_remove_share_mode: write time forced "
 362                         "for file %s\n",
 363                         fsp_str_dbg(fsp)));
 364                 set_close_write_time(fsp, lck->data->changed_write_time);
 365         } else if (fsp->update_write_time_on_close) {
 366                 /* Someone had a pending write. */
 367                 if (null_timespec(fsp->close_write_time)) {
 368                         DEBUG(10,("close_remove_share_mode: update to current time "
 369                                 "for file %s\n",
 370                                 fsp_str_dbg(fsp)));
 371                         /* Update to current time due to "normal" write. */
 372                         set_close_write_time(fsp, timespec_current());
 373                 } else {
 374                         DEBUG(10,("close_remove_share_mode: write time pending "
 375                                 "for file %s\n",
 376                                 fsp_str_dbg(fsp)));
 377                         /* Update to time set on close call. */
 378                         set_close_write_time(fsp, fsp->close_write_time);
 379                 }
 380         }
 381
 382         if (!del_share_mode(lck, fsp)) {
 383                 DEBUG(0, ("close_remove_share_mode: Could not delete share "
 384                           "entry for file %s\n",
 385                           fsp_str_dbg(fsp)));
 386         }
 387
 388         if (fsp->initial_delete_on_close &&
 389                         !is_delete_on_close_set(lck, fsp->name_hash)) {
 390                 bool became_user = False;
 391
 392                 /* Initial delete on close was set and no one else
 393                  * wrote a real delete on close. */
 394
 395                 if (get_current_vuid(conn) != fsp->vuid) {
 396                         become_user(conn, fsp->vuid);
 397                         became_user = True;
 398                 }
 399                 fsp->delete_on_close = true;
 400                 set_delete_on_close_lck(fsp, lck, True,
 401                                 get_current_nttok(conn),
 402                                 get_current_utok(conn));
 403                 if (became_user) {
 404                         unbecome_user();
 405                 }
 406         }
 407
 408         delete_file = is_delete_on_close_set(lck, fsp->name_hash);
 409
 410         if (delete_file) {
 411                 int i;
 412                 /* See if others still have the file open via this pathname.
 413                    If this is the case, then don't delete. If all opens are
 414                    POSIX delete now. */
 415                 for (i=0; i<lck->data->num_share_modes; i++) {
 416                         struct share_mode_entry *e = &lck->data->share_modes[i];
 417                         if (is_valid_share_mode_entry(e) &&
 418                                         e->name_hash == fsp->name_hash) {
 419                                 if (fsp->posix_open && (e->flags & SHARE_MODE_FLAG_POSIX_OPEN)) {
 420                                         continue;
 421                                 }
 422                                 delete_file = False;
 423                                 break;
 424                         }
 425                 }
 426         }
 427
 428         /* Notify any deferred opens waiting on this close. */
 429         notify_deferred_opens(conn->sconn, lck);
 430         reply_to_oplock_break_requests(fsp);
 431
 432         /*
 433          * NT can set delete_on_close of the last open
 434          * reference to a file.
 435          */
 436
 437         if (!(close_type == NORMAL_CLOSE || close_type == SHUTDOWN_CLOSE) ||
 438                         !delete_file) {
 439                 TALLOC_FREE(lck);
 440                 return NT_STATUS_OK;
 441         }
 442
 443         /*
 444          * Ok, we have to delete the file
 445          */
 446
 447         DEBUG(5,("close_remove_share_mode: file %s. Delete on close was set "
 448                  "- deleting file.\n", fsp_str_dbg(fsp)));
 449
 450         /*
 451          * Don't try to update the write time when we delete the file
 452          */
 453         fsp->update_write_time_on_close = false;
 454
 455         got_tokens = get_delete_on_close_token(lck, fsp->name_hash,
 456                                         &del_nt_token, &del_token);
 457         SMB_ASSERT(got_tokens);
 458
 459         if (!unix_token_equal(del_token, get_current_utok(conn))) {
 460                 /* Become the user who requested the delete. */
 461
 462                 DEBUG(5,("close_remove_share_mode: file %s. "
 463                         "Change user to uid %u\n",
 464                         fsp_str_dbg(fsp),
 465                         (unsigned int)del_token->uid));
 466
 467                 if (!push_sec_ctx()) {
 468                         smb_panic("close_remove_share_mode: file %s. failed to push "
 469                                   "sec_ctx.\n");
 470                 }
 471
 472                 set_sec_ctx(del_token->uid,
 473                             del_token->gid,
 474                             del_token->ngroups,
 475                             del_token->groups,
 476                             del_nt_token);
 477
 478                 changed_user = true;
 479         }
 480
 481         /* We can only delete the file if the name we have is still valid and
 482            hasn't been renamed. */
 483
 484         tmp_status = vfs_stat_fsp(fsp);
 485         if (!NT_STATUS_IS_OK(tmp_status)) {
 486                 DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
 487                          "was set and stat failed with error %s\n",
 488                          fsp_str_dbg(fsp), nt_errstr(tmp_status)));
 489                 /*
 490                  * Don't save the errno here, we ignore this error
 491                  */
 492                 goto done;
 493         }
 494
 495         id = vfs_file_id_from_sbuf(conn, &fsp->fsp_name->st);
 496
 497         if (!file_id_equal(&fsp->file_id, &id)) {
 498                 DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
 499                          "was set and dev and/or inode does not match\n",
 500                          fsp_str_dbg(fsp)));
 501                 DEBUG(5,("close_remove_share_mode: file %s. stored file_id %s, "
 502                          "stat file_id %s\n",
 503                          fsp_str_dbg(fsp),
 504                          file_id_string_tos(&fsp->file_id),
 505                          file_id_string_tos(&id)));
 506                 /*
 507                  * Don't save the errno here, we ignore this error
 508                  */
 509                 goto done;
 510         }
 511
 512         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
 513             && !is_ntfs_stream_smb_fname(fsp->fsp_name)) {
 514
 515                 status = delete_all_streams(conn, fsp->fsp_name->base_name);
 516
 517                 if (!NT_STATUS_IS_OK(status)) {
 518                         DEBUG(5, ("delete_all_streams failed: %s\n",
 519                                   nt_errstr(status)));
 520                         goto done;
 521                 }
 522         }
 523
 524
 525         if (SMB_VFS_UNLINK(conn, fsp->fsp_name) != 0) {
 526                 /*
 527                  * This call can potentially fail as another smbd may
 528                  * have had the file open with delete on close set and
 529                  * deleted it when its last reference to this file
 530                  * went away. Hence we log this but not at debug level
 531                  * zero.
 532                  */
 533
 534                 DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
 535                          "was set and unlink failed with error %s\n",
 536                          fsp_str_dbg(fsp), strerror(errno)));
 537
 538                 status = map_nt_error_from_unix(errno);
 539         }
 540
 541         /* As we now have POSIX opens which can unlink
 542          * with other open files we may have taken
 543          * this code path with more than one share mode
 544          * entry - ensure we only delete once by resetting
 545          * the delete on close flag. JRA.
 546          */
 547
 548         fsp->delete_on_close = false;
 549         set_delete_on_close_lck(fsp, lck, false, NULL, NULL);
 550
 551  done:
 552
 553         if (changed_user) {
 554                 /* unbecome user. */
 555                 pop_sec_ctx();
 556         }
 557
 558         TALLOC_FREE(lck);
 559
 560         if (delete_file) {
 561                 /*
 562                  * Do the notification after we released the share
 563                  * mode lock. Inside notify_fname we take out another
 564                  * tdb lock. With ctdb also accessing our databases,
 565                  * this can lead to deadlocks. Putting this notify
 566                  * after the TALLOC_FREE(lck) above we avoid locking
 567                  * two records simultaneously. Notifies are async and
 568                  * informational only, so calling the notify_fname
 569                  * without holding the share mode lock should not do
 570                  * any harm.
 571                  */
 572                 notify_fname(conn, NOTIFY_ACTION_REMOVED,
 573                              FILE_NOTIFY_CHANGE_FILE_NAME,
 574                              fsp->fsp_name->base_name);
 575         }
 576
 577         return status;
 578 }
 579
 580 void set_close_write_time(struct files_struct *fsp, struct timespec ts)
 581 {
 582         DEBUG(6,("close_write_time: %s" , time_to_asc(convert_timespec_to_time_t(ts))));
 583
 584         if (null_timespec(ts)) {
 585                 return;
 586         }
 587         fsp->write_time_forced = false;
 588         fsp->update_write_time_on_close = true;
 589         fsp->close_write_time = ts;
 590 }
 591
 592 static NTSTATUS update_write_time_on_close(struct files_struct *fsp)
 593 {
 594         struct smb_file_time ft;
 595         NTSTATUS status;
 596         struct share_mode_lock *lck = NULL;
 597
 598         ZERO_STRUCT(ft);
 599
 600         if (!fsp->update_write_time_on_close) {
 601                 return NT_STATUS_OK;
 602         }
 603
 604         if (null_timespec(fsp->close_write_time)) {
 605                 fsp->close_write_time = timespec_current();
 606         }
 607
 608         /* Ensure we have a valid stat struct for the source. */
 609         status = vfs_stat_fsp(fsp);
 610         if (!NT_STATUS_IS_OK(status)) {
 611                 return status;
 612         }
 613
 614         if (!VALID_STAT(fsp->fsp_name->st)) {
 615                 /* if it doesn't seem to be a real file */
 616                 return NT_STATUS_OK;
 617         }
 618
 619         /*
 620          * get_existing_share_mode_lock() isn't really the right
 621          * call here, as we're being called after
 622          * close_remove_share_mode() inside close_normal_file()
 623          * so it's quite normal to not have an existing share
 624          * mode here. However, get_share_mode_lock() doesn't
 625          * work because that will create a new share mode if
 626          * one doesn't exist - so stick with this call (just
 627          * ignore any error we get if the share mode doesn't
 628          * exist.
 629          */
 630
 631         lck = get_existing_share_mode_lock(talloc_tos(), fsp->file_id);
 632         if (lck) {
 633                 /* On close if we're changing the real file time we
 634                  * must update it in the open file db too. */
 635                 (void)set_write_time(fsp->file_id, fsp->close_write_time);
 636
 637                 /* Close write times overwrite sticky write times
 638                    so we must replace any sticky write time here. */
 639                 if (!null_timespec(lck->data->changed_write_time)) {
 640                         (void)set_sticky_write_time(fsp->file_id, fsp->close_write_time);
 641                 }
 642                 TALLOC_FREE(lck);
 643         }
 644
 645         ft.mtime = fsp->close_write_time;
 646         /* As this is a close based update, we are not directly changing the
 647            file attributes from a client call, but indirectly from a write. */
 648         status = smb_set_file_time(fsp->conn, fsp, fsp->fsp_name, &ft, false);
 649         if (!NT_STATUS_IS_OK(status)) {
 650                 DEBUG(10,("update_write_time_on_close: smb_set_file_time "
 651                         "on file %s returned %s\n",
 652                         fsp_str_dbg(fsp),
 653                         nt_errstr(status)));
 654                 return status;
 655         }
 656
 657         return status;
 658 }
 659
 660 static NTSTATUS ntstatus_keeperror(NTSTATUS s1, NTSTATUS s2)
 661 {
 662         if (!NT_STATUS_IS_OK(s1)) {
 663                 return s1;
 664         }
 665         return s2;
 666 }
 667
 668 /****************************************************************************
 669  Close a file.
 670
 671  close_type can be NORMAL_CLOSE=0,SHUTDOWN_CLOSE,ERROR_CLOSE.
 672  printing and magic scripts are only run on normal close.
 673  delete on close is done on normal and shutdown close.
 674 ****************************************************************************/
 675
 676 static NTSTATUS close_normal_file(struct smb_request *req, files_struct *fsp,
 677                                   enum file_close_type close_type)
 678 {
 679         NTSTATUS status = NT_STATUS_OK;
 680         NTSTATUS tmp;
 681         connection_struct *conn = fsp->conn;
 682         int ret;
 683
 684         /*
 685          * If we're finishing async io on a close we can get a write
 686          * error here, we must remember this.
 687          */
 688         ret = wait_for_aio_completion(fsp);
 689         if (ret) {
 690                 status = ntstatus_keeperror(
 691                         status, map_nt_error_from_unix(ret));
 692         }
 693
 694         /*
 695          * If we're flushing on a close we can get a write
 696          * error here, we must remember this.
 697          */
 698
 699         tmp = close_filestruct(fsp);
 700         status = ntstatus_keeperror(status, tmp);
 701
 702         if (fsp->print_file) {
 703                 /* FIXME: return spool errors */
 704                 print_spool_end(fsp, close_type);
 705                 file_free(req, fsp);
 706                 return NT_STATUS_OK;
 707         }
 708
 709         /* Remove the oplock before potentially deleting the file. */
 710         if(fsp->oplock_type) {
 711                 release_file_oplock(fsp);
 712         }
 713
 714         /* If this is an old DOS or FCB open and we have multiple opens on
 715            the same handle we only have one share mode. Ensure we only remove
 716            the share mode on the last close. */
 717
 718         if (fsp->fh->ref_count == 1) {
 719                 /* Should we return on error here... ? */
 720                 tmp = close_remove_share_mode(fsp, close_type);
 721                 status = ntstatus_keeperror(status, tmp);
 722         }
 723
 724         locking_close_file(conn->sconn->msg_ctx, fsp, close_type);
 725
 726         tmp = fd_close(fsp);
 727         status = ntstatus_keeperror(status, tmp);
 728
 729         /* check for magic scripts */
 730         if (close_type == NORMAL_CLOSE) {
 731                 tmp = check_magic(fsp);
 732                 status = ntstatus_keeperror(status, tmp);
 733         }
 734
 735         /*
 736          * Ensure pending modtime is set after close.
 737          */
 738
 739         tmp = update_write_time_on_close(fsp);
 740         if (NT_STATUS_EQUAL(tmp, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
 741                 /* Someone renamed the file or a parent directory containing
 742                  * this file. We can't do anything about this, we don't have
 743                  * an "update timestamp by fd" call in POSIX. Eat the error. */
 744
 745                 tmp = NT_STATUS_OK;
 746         }
 747
 748         status = ntstatus_keeperror(status, tmp);
 749
 750         DEBUG(2,("%s closed file %s (numopen=%d) %s\n",
 751                 conn->session_info->unix_info->unix_name, fsp_str_dbg(fsp),
 752                 conn->num_files_open - 1,
 753                 nt_errstr(status) ));
 754
 755         file_free(req, fsp);
 756         return status;
 757 }
 758 /****************************************************************************
 759  Static function used by reply_rmdir to delete an entire directory
 760  tree recursively. Return True on ok, False on fail.
 761 ****************************************************************************/
 762
 763 static bool recursive_rmdir(TALLOC_CTX *ctx,
 764                         connection_struct *conn,
 765                         struct smb_filename *smb_dname)
 766 {
 767         const char *dname = NULL;
 768         char *talloced = NULL;
 769         bool ret = True;
 770         long offset = 0;
 771         SMB_STRUCT_STAT st;
 772         struct smb_Dir *dir_hnd;
 773
 774         SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
 775
 776         dir_hnd = OpenDir(talloc_tos(), conn, smb_dname->base_name, NULL, 0);
 777         if(dir_hnd == NULL)
 778                 return False;
 779
 780         while((dname = ReadDirName(dir_hnd, &offset, &st, &talloced))) {
 781                 struct smb_filename *smb_dname_full = NULL;
 782                 char *fullname = NULL;
 783                 bool do_break = true;
 784                 NTSTATUS status;
 785
 786                 if (ISDOT(dname) || ISDOTDOT(dname)) {
 787                         TALLOC_FREE(talloced);
 788                         continue;
 789                 }
 790
 791                 if (!is_visible_file(conn, smb_dname->base_name, dname, &st,
 792                                      false)) {
 793                         TALLOC_FREE(talloced);
 794                         continue;
 795                 }
 796
 797                 /* Construct the full name. */
 798                 fullname = talloc_asprintf(ctx,
 799                                 "%s/%s",
 800                                 smb_dname->base_name,
 801                                 dname);
 802                 if (!fullname) {
 803                         errno = ENOMEM;
 804                         goto err_break;
 805                 }
 806
 807                 status = create_synthetic_smb_fname(talloc_tos(), fullname,
 808                                                     NULL, NULL,
 809                                                     &smb_dname_full);
 810                 if (!NT_STATUS_IS_OK(status)) {
 811                         goto err_break;
 812                 }
 813
 814                 if(SMB_VFS_LSTAT(conn, smb_dname_full) != 0) {
 815                         goto err_break;
 816                 }
 817
 818                 if(smb_dname_full->st.st_ex_mode & S_IFDIR) {
 819                         if(!recursive_rmdir(ctx, conn, smb_dname_full)) {
 820                                 goto err_break;
 821                         }
 822                         if(SMB_VFS_RMDIR(conn,
 823                                          smb_dname_full->base_name) != 0) {
 824                                 goto err_break;
 825                         }
 826                 } else if(SMB_VFS_UNLINK(conn, smb_dname_full) != 0) {
 827                         goto err_break;
 828                 }
 829
 830                 /* Successful iteration. */
 831                 do_break = false;
 832
 833          err_break:
 834                 TALLOC_FREE(smb_dname_full);
 835                 TALLOC_FREE(fullname);
 836                 TALLOC_FREE(talloced);
 837                 if (do_break) {
 838                         ret = false;
 839                         break;
 840                 }
 841         }
 842         TALLOC_FREE(dir_hnd);
 843         return ret;
 844 }
 845
 846 /****************************************************************************
 847  The internals of the rmdir code - called elsewhere.
 848 ****************************************************************************/
 849
 850 static NTSTATUS rmdir_internals(TALLOC_CTX *ctx, files_struct *fsp)
 851 {
 852         connection_struct *conn = fsp->conn;
 853         struct smb_filename *smb_dname = fsp->fsp_name;
 854         int ret;
 855
 856         SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
 857
 858         /* Might be a symlink. */
 859         if(SMB_VFS_LSTAT(conn, smb_dname) != 0) {
 860                 return map_nt_error_from_unix(errno);
 861         }
 862
 863         if (S_ISLNK(smb_dname->st.st_ex_mode)) {
 864                 /* Is what it points to a directory ? */
 865                 if(SMB_VFS_STAT(conn, smb_dname) != 0) {
 866                         return map_nt_error_from_unix(errno);
 867                 }
 868                 if (!(S_ISDIR(smb_dname->st.st_ex_mode))) {
 869                         return NT_STATUS_NOT_A_DIRECTORY;
 870                 }
 871                 ret = SMB_VFS_UNLINK(conn, smb_dname);
 872         } else {
 873                 ret = SMB_VFS_RMDIR(conn, smb_dname->base_name);
 874         }
 875         if (ret == 0) {
 876                 notify_fname(conn, NOTIFY_ACTION_REMOVED,
 877                              FILE_NOTIFY_CHANGE_DIR_NAME,
 878                              smb_dname->base_name);
 879                 return NT_STATUS_OK;
 880         }
 881
 882         if(((errno == ENOTEMPTY)||(errno == EEXIST)) && *lp_veto_files(SNUM(conn))) {
 883                 /*
 884                  * Check to see if the only thing in this directory are
 885                  * vetoed files/directories. If so then delete them and
 886                  * retry. If we fail to delete any of them (and we *don't*
 887                  * do a recursive delete) then fail the rmdir.
 888                  */
 889                 SMB_STRUCT_STAT st;
 890                 const char *dname = NULL;
 891                 char *talloced = NULL;
 892                 long dirpos = 0;
 893                 struct smb_Dir *dir_hnd = OpenDir(talloc_tos(), conn,
 894                                                   smb_dname->base_name, NULL,
 895                                                   0);
 896
 897                 if(dir_hnd == NULL) {
 898                         errno = ENOTEMPTY;
 899                         goto err;
 900                 }
 901
 902                 while ((dname = ReadDirName(dir_hnd, &dirpos, &st,
 903                                             &talloced)) != NULL) {
 904                         if((strcmp(dname, ".") == 0) || (strcmp(dname, "..")==0)) {
 905                                 TALLOC_FREE(talloced);
 906                                 continue;
 907                         }
 908                         if (!is_visible_file(conn, smb_dname->base_name, dname,
 909                                              &st, false)) {
 910                                 TALLOC_FREE(talloced);
 911                                 continue;
 912                         }
 913                         if(!IS_VETO_PATH(conn, dname)) {
 914                                 TALLOC_FREE(dir_hnd);
 915                                 TALLOC_FREE(talloced);
 916                                 errno = ENOTEMPTY;
 917                                 goto err;
 918                         }
 919                         TALLOC_FREE(talloced);
 920                 }
 921
 922                 /* We only have veto files/directories.
 923                  * Are we allowed to delete them ? */
 924
 925                 if(!lp_recursive_veto_delete(SNUM(conn))) {
 926                         TALLOC_FREE(dir_hnd);
 927                         errno = ENOTEMPTY;
 928                         goto err;
 929                 }
 930
 931                 /* Do a recursive delete. */
 932                 RewindDir(dir_hnd,&dirpos);
 933                 while ((dname = ReadDirName(dir_hnd, &dirpos, &st,
 934                                             &talloced)) != NULL) {
 935                         struct smb_filename *smb_dname_full = NULL;
 936                         char *fullname = NULL;
 937                         bool do_break = true;
 938                         NTSTATUS status;
 939
 940                         if (ISDOT(dname) || ISDOTDOT(dname)) {
 941                                 TALLOC_FREE(talloced);
 942                                 continue;
 943                         }
 944                         if (!is_visible_file(conn, smb_dname->base_name, dname,
 945                                              &st, false)) {
 946                                 TALLOC_FREE(talloced);
 947                                 continue;
 948                         }
 949
 950                         fullname = talloc_asprintf(ctx,
 951                                         "%s/%s",
 952                                         smb_dname->base_name,
 953                                         dname);
 954
 955                         if(!fullname) {
 956                                 errno = ENOMEM;
 957                                 goto err_break;
 958                         }
 959
 960                         status = create_synthetic_smb_fname(talloc_tos(),
 961                                                             fullname, NULL,
 962                                                             NULL,
 963                                                             &smb_dname_full);
 964                         if (!NT_STATUS_IS_OK(status)) {
 965                                 errno = map_errno_from_nt_status(status);
 966                                 goto err_break;
 967                         }
 968
 969                         if(SMB_VFS_LSTAT(conn, smb_dname_full) != 0) {
 970                                 goto err_break;
 971                         }
 972                         if(smb_dname_full->st.st_ex_mode & S_IFDIR) {
 973                                 if(!recursive_rmdir(ctx, conn,
 974                                                     smb_dname_full)) {
 975                                         goto err_break;
 976                                 }
 977                                 if(SMB_VFS_RMDIR(conn,
 978                                         smb_dname_full->base_name) != 0) {
 979                                         goto err_break;
 980                                 }
 981                         } else if(SMB_VFS_UNLINK(conn, smb_dname_full) != 0) {
 982                                 goto err_break;
 983                         }
 984
 985                         /* Successful iteration. */
 986                         do_break = false;
 987
 988                  err_break:
 989                         TALLOC_FREE(fullname);
 990                         TALLOC_FREE(smb_dname_full);
 991                         TALLOC_FREE(talloced);
 992                         if (do_break)
 993                                 break;
 994                 }
 995                 TALLOC_FREE(dir_hnd);
 996                 /* Retry the rmdir */
 997                 ret = SMB_VFS_RMDIR(conn, smb_dname->base_name);
 998         }
 999
1000   err:
1001
1002         if (ret != 0) {
1003                 DEBUG(3,("rmdir_internals: couldn't remove directory %s : "
1004                          "%s\n", smb_fname_str_dbg(smb_dname),
1005                          strerror(errno)));
1006                 return map_nt_error_from_unix(errno);
1007         }
1008
1009         notify_fname(conn, NOTIFY_ACTION_REMOVED,
1010                      FILE_NOTIFY_CHANGE_DIR_NAME,
1011                      smb_dname->base_name);
1012
1013         return NT_STATUS_OK;
1014 }
1015
1016 /****************************************************************************
1017  Close a directory opened by an NT SMB call.
1018 ****************************************************************************/
1019
1020 static NTSTATUS close_directory(struct smb_request *req, files_struct *fsp,
1021                                 enum file_close_type close_type)
1022 {
1023         struct share_mode_lock *lck = NULL;
1024         bool delete_dir = False;
1025         NTSTATUS status = NT_STATUS_OK;
1026         NTSTATUS status1 = NT_STATUS_OK;
1027         const struct security_token *del_nt_token = NULL;
1028         const struct security_unix_token *del_token = NULL;
1029
1030         /*
1031          * NT can set delete_on_close of the last open
1032          * reference to a directory also.
1033          */
1034
1035         lck = get_existing_share_mode_lock(talloc_tos(), fsp->file_id);
1036         if (lck == NULL) {
1037                 DEBUG(0, ("close_directory: Could not get share mode lock for "
1038                           "%s\n", fsp_str_dbg(fsp)));
1039                 status = NT_STATUS_INVALID_PARAMETER;
1040                 goto out;
1041         }
1042
1043         if (!del_share_mode(lck, fsp)) {
1044                 DEBUG(0, ("close_directory: Could not delete share entry for "
1045                           "%s\n", fsp_str_dbg(fsp)));
1046         }
1047
1048         if (fsp->initial_delete_on_close) {
1049                 bool became_user = False;
1050
1051                 /* Initial delete on close was set - for
1052                  * directories we don't care if anyone else
1053                  * wrote a real delete on close. */
1054
1055                 if (get_current_vuid(fsp->conn) != fsp->vuid) {
1056                         become_user(fsp->conn, fsp->vuid);
1057                         became_user = True;
1058                 }
1059                 send_stat_cache_delete_message(fsp->conn->sconn->msg_ctx,
1060                                                fsp->fsp_name->base_name);
1061                 set_delete_on_close_lck(fsp, lck, true,
1062                                 get_current_nttok(fsp->conn),
1063                                 get_current_utok(fsp->conn));
1064                 fsp->delete_on_close = true;
1065                 if (became_user) {
1066                         unbecome_user();
1067                 }
1068         }
1069
1070         delete_dir = get_delete_on_close_token(lck, fsp->name_hash,
1071                                         &del_nt_token, &del_token);
1072
1073         if (delete_dir) {
1074                 int i;
1075                 /* See if others still have the dir open. If this is the
1076                  * case, then don't delete. If all opens are POSIX delete now. */
1077                 for (i=0; i<lck->data->num_share_modes; i++) {
1078                         struct share_mode_entry *e = &lck->data->share_modes[i];
1079                         if (is_valid_share_mode_entry(e) &&
1080                                         e->name_hash == fsp->name_hash) {
1081                                 if (fsp->posix_open && (e->flags & SHARE_MODE_FLAG_POSIX_OPEN)) {
1082                                         continue;
1083                                 }
1084                                 delete_dir = False;
1085                                 break;
1086                         }
1087                 }
1088         }
1089
1090         if ((close_type == NORMAL_CLOSE || close_type == SHUTDOWN_CLOSE) &&
1091                                 delete_dir) {
1092
1093                 /* Become the user who requested the delete. */
1094
1095                 if (!push_sec_ctx()) {
1096                         smb_panic("close_directory: failed to push sec_ctx.\n");
1097                 }
1098
1099                 set_sec_ctx(del_token->uid,
1100                                 del_token->gid,
1101                                 del_token->ngroups,
1102                                 del_token->groups,
1103                                 del_nt_token);
1104
1105                 TALLOC_FREE(lck);
1106
1107                 if ((fsp->conn->fs_capabilities & FILE_NAMED_STREAMS)
1108                     && !is_ntfs_stream_smb_fname(fsp->fsp_name)) {
1109
1110                         status = delete_all_streams(fsp->conn, fsp->fsp_name->base_name);
1111                         if (!NT_STATUS_IS_OK(status)) {
1112                                 DEBUG(5, ("delete_all_streams failed: %s\n",
1113                                           nt_errstr(status)));
1114                                 goto out;
1115                         }
1116                 }
1117
1118                 status = rmdir_internals(talloc_tos(), fsp);
1119
1120                 DEBUG(5,("close_directory: %s. Delete on close was set - "
1121                          "deleting directory returned %s.\n",
1122                          fsp_str_dbg(fsp), nt_errstr(status)));
1123
1124                 /* unbecome user. */
1125                 pop_sec_ctx();
1126
1127                 /*
1128                  * Ensure we remove any change notify requests that would
1129                  * now fail as the directory has been deleted.
1130                  */
1131
1132                 if(NT_STATUS_IS_OK(status)) {
1133                         remove_pending_change_notify_requests_by_fid(fsp, NT_STATUS_DELETE_PENDING);
1134                 }
1135         } else {
1136                 TALLOC_FREE(lck);
1137                 remove_pending_change_notify_requests_by_fid(
1138                         fsp, NT_STATUS_OK);
1139         }
1140
1141         status1 = fd_close(fsp);
1142
1143         if (!NT_STATUS_IS_OK(status1)) {
1144                 DEBUG(0, ("Could not close dir! fname=%s, fd=%d, err=%d=%s\n",
1145                           fsp_str_dbg(fsp), fsp->fh->fd, errno,
1146                           strerror(errno)));
1147         }
1148
1149         /*
1150          * Do the code common to files and directories.
1151          */
1152         close_filestruct(fsp);
1153         file_free(req, fsp);
1154
1155  out:
1156         TALLOC_FREE(lck);
1157         if (NT_STATUS_IS_OK(status) && !NT_STATUS_IS_OK(status1)) {
1158                 status = status1;
1159         }
1160         return status;
1161 }
1162
1163 /****************************************************************************
1164  Close a files_struct.
1165 ****************************************************************************/
1166
1167 NTSTATUS close_file(struct smb_request *req, files_struct *fsp,
1168                     enum file_close_type close_type)
1169 {
1170         NTSTATUS status;
1171         struct files_struct *base_fsp = fsp->base_fsp;
1172
1173         if(fsp->is_directory) {
1174                 status = close_directory(req, fsp, close_type);
1175         } else if (fsp->fake_file_handle != NULL) {
1176                 status = close_fake_file(req, fsp);
1177         } else {
1178                 status = close_normal_file(req, fsp, close_type);
1179         }
1180
1181         if ((base_fsp != NULL) && (close_type != SHUTDOWN_CLOSE)) {
1182
1183                 /*
1184                  * fsp was a stream, the base fsp can't be a stream as well
1185                  *
1186                  * For SHUTDOWN_CLOSE this is not possible here, because
1187                  * SHUTDOWN_CLOSE only happens from files.c which walks the
1188                  * complete list of files. If we mess with more than one fsp
1189                  * those loops will become confused.
1190                  */
1191
1192                 SMB_ASSERT(base_fsp->base_fsp == NULL);
1193                 close_file(req, base_fsp, close_type);
1194         }
1195
1196         return status;
1197 }
1198
1199 /****************************************************************************
1200  Deal with an (authorized) message to close a file given the share mode
1201  entry.
1202 ****************************************************************************/
1203
1204 void msg_close_file(struct messaging_context *msg_ctx,
1205                         void *private_data,
1206                         uint32_t msg_type,
1207                         struct server_id server_id,
1208                         DATA_BLOB *data)
1209 {
1210         files_struct *fsp = NULL;
1211         struct share_mode_entry e;
1212         struct smbd_server_connection *sconn =
1213                 talloc_get_type_abort(private_data,
1214                 struct smbd_server_connection);
1215
1216         message_to_share_mode_entry(&e, (char *)data->data);
1217
1218         if(DEBUGLVL(10)) {
1219                 char *sm_str = share_mode_str(NULL, 0, &e);
1220                 if (!sm_str) {
1221                         smb_panic("talloc failed");
1222                 }
1223                 DEBUG(10,("msg_close_file: got request to close share mode "
1224                         "entry %s\n", sm_str));
1225                 TALLOC_FREE(sm_str);
1226         }
1227
1228         fsp = file_find_dif(sconn, e.id, e.share_file_id);
1229         if (!fsp) {
1230                 DEBUG(10,("msg_close_file: failed to find file.\n"));
1231                 return;
1232         }
1233         close_file(NULL, fsp, NORMAL_CLOSE);
1234 }