2 Unix SMB/CIFS implementation.
3 file opening and share modes
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 2001
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 2 of the License, or
10 (at your option) any later version.
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.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 extern userdom_struct current_user_info;
25 extern uint16 global_oplock_port;
26 extern BOOL global_client_failed_oplock_break;
28 /****************************************************************************
29 fd support routines - attempt to do a dos_open.
30 ****************************************************************************/
32 static int fd_open(struct connection_struct *conn, char *fname,
33 int flags, mode_t mode)
37 if (!lp_symlinks(SNUM(conn)))
41 fd = conn->vfs_ops.open(conn,fname,flags,mode);
43 /* Fix for files ending in '.' */
44 if((fd == -1) && (errno == ENOENT) &&
45 (strchr_m(fname,'.')==NULL)) {
47 fd = conn->vfs_ops.open(conn,fname,flags,mode);
50 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n", fname,
51 flags, (int)mode, fd, (fd == -1) ? strerror(errno) : "" ));
56 /****************************************************************************
57 Close the file associated with a fsp.
58 ****************************************************************************/
60 int fd_close(struct connection_struct *conn, files_struct *fsp)
63 return 0; /* what we used to call a stat open. */
64 return fd_close_posix(conn, fsp);
68 /****************************************************************************
69 Check a filename for the pipe string.
70 ****************************************************************************/
72 static void check_for_pipe(char *fname)
74 /* special case of pipe opens */
76 StrnCpy(s,fname,sizeof(s)-1);
78 if (strstr(s,"pipe/")) {
79 DEBUG(3,("Rejecting named pipe open for %s\n",fname));
80 unix_ERR_class = ERRSRV;
81 unix_ERR_code = ERRaccess;
85 /****************************************************************************
87 ****************************************************************************/
89 static BOOL open_file(files_struct *fsp,connection_struct *conn,
90 const char *fname1,SMB_STRUCT_STAT *psbuf,int flags,mode_t mode, uint32 desired_access)
92 extern struct current_user current_user;
94 int accmode = (flags & O_ACCMODE);
95 int local_flags = flags;
98 fsp->oplock_type = NO_OPLOCK;
101 pstrcpy(fname,fname1);
103 /* Check permissions */
106 * This code was changed after seeing a client open request
107 * containing the open mode of (DENY_WRITE/read-only) with
108 * the 'create if not exist' bit set. The previous code
109 * would fail to open the file read only on a read-only share
110 * as it was checking the flags parameter directly against O_RDONLY,
111 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
115 if (!CAN_WRITE(conn)) {
116 /* It's a read-only share - fail if we wanted to write. */
117 if(accmode != O_RDONLY) {
118 DEBUG(3,("Permission denied opening %s\n",fname));
119 check_for_pipe(fname);
121 } else if(flags & O_CREAT) {
122 /* We don't want to write - but we must make sure that O_CREAT
123 doesn't create the file if we have write access into the
131 * This little piece of insanity is inspired by the
132 * fact that an NT client can open a file for O_RDONLY,
133 * but set the create disposition to FILE_EXISTS_TRUNCATE.
134 * If the client *can* write to the file, then it expects to
135 * truncate the file, even though it is opening for readonly.
136 * Quicken uses this stupid trick in backup file creation...
137 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
138 * for helping track this one down. It didn't bite us in 2.0.x
139 * as we always opened files read-write in that release. JRA.
142 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
143 DEBUG(10,("open_file: truncate requested on read-only open for file %s\n",fname ));
144 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
147 if ((desired_access & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
148 (local_flags & O_CREAT) || ((local_flags & O_TRUNC) == O_TRUNC) ) {
151 * We can't actually truncate here as the file may be locked.
152 * open_file_shared will take care of the truncate later. JRA.
155 local_flags &= ~O_TRUNC;
157 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
159 * We would block on opening a FIFO with no one else on the
160 * other end. Do what we used to do and add O_NONBLOCK to the
164 if (VALID_STAT(*psbuf) && S_ISFIFO(psbuf->st_mode))
165 local_flags |= O_NONBLOCK;
168 /* Actually do the open */
169 fsp->fd = fd_open(conn, fname, local_flags, mode);
171 /* Inherit the ACL if the file was created. */
172 if ((local_flags & O_CREAT) && !VALID_STAT(*psbuf))
173 inherit_access_acl(conn, fname, mode);
176 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) (flags=%d)\n",
177 fname,strerror(errno),local_flags,flags));
178 check_for_pipe(fname);
182 fsp->fd = -1; /* What we used to call a stat open. */
184 if (!VALID_STAT(*psbuf)) {
188 ret = vfs_stat(conn, fname, psbuf);
190 ret = vfs_fstat(fsp,fsp->fd,psbuf);
191 /* If we have an fd, this stat should succeed. */
193 DEBUG(0,("Error doing fstat on open file %s (%s)\n", fname,strerror(errno) ));
196 /* For a non-io open, this stat failing means file not found. JRA */
204 * POSIX allows read-only opens of directories. We don't
205 * want to do this (we use a different code path for this)
206 * so catch a directory open and return an EISDIR. JRA.
209 if(S_ISDIR(psbuf->st_mode)) {
215 fsp->mode = psbuf->st_mode;
216 fsp->inode = psbuf->st_ino;
217 fsp->dev = psbuf->st_dev;
218 fsp->vuid = current_user.vuid;
219 fsp->size = psbuf->st_size;
221 fsp->can_lock = True;
222 fsp->can_read = ((flags & O_WRONLY)==0);
223 fsp->can_write = ((flags & (O_WRONLY|O_RDWR))!=0);
225 fsp->desired_access = desired_access;
226 fsp->print_file = False;
227 fsp->modified = False;
228 fsp->oplock_type = NO_OPLOCK;
229 fsp->sent_oplock_break = NO_BREAK_SENT;
230 fsp->is_directory = False;
231 fsp->directory_delete_on_close = False;
233 string_set(&fsp->fsp_name,fname);
234 fsp->wcp = NULL; /* Write cache pointer. */
236 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
237 *current_user_info.smb_name ? current_user_info.smb_name : conn->user,fsp->fsp_name,
238 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
239 conn->num_files_open + 1));
244 /****************************************************************************
246 Helper for open_file_shared.
247 Truncate a file after checking locking; close file if locked.
248 **************************************************************************/
250 static int truncate_unless_locked(struct connection_struct *conn, files_struct *fsp)
252 SMB_BIG_UINT mask = (SMB_BIG_UINT)-1;
254 if (is_locked(fsp,fsp->conn,mask,0,WRITE_LOCK,True)){
256 unix_ERR_class = ERRDOS;
257 unix_ERR_code = ERRlock;
260 return conn->vfs_ops.ftruncate(fsp,fsp->fd,0);
264 /*******************************************************************
265 return True if the filename is one of the special executable types
266 ********************************************************************/
267 static BOOL is_executable(const char *fname)
269 if ((fname = strrchr_m(fname,'.'))) {
270 if (strequal(fname,".com") ||
271 strequal(fname,".dll") ||
272 strequal(fname,".exe") ||
273 strequal(fname,".sym")) {
280 enum {AFAIL,AREAD,AWRITE,AALL};
282 /*******************************************************************
283 reproduce the share mode access table
284 this is horrendoously complex, and really can't be justified on any
285 rational grounds except that this is _exactly_ what NT does. See
286 the DENY1 and DENY2 tests in smbtorture for a comprehensive set of
288 ********************************************************************/
289 static int access_table(int new_deny,int old_deny,int old_mode,
290 BOOL same_pid, BOOL isexe)
292 if (new_deny == DENY_ALL || old_deny == DENY_ALL) return(AFAIL);
295 if (isexe && old_mode == DOS_OPEN_RDONLY &&
296 old_deny == DENY_DOS && new_deny == DENY_READ) {
299 if (!isexe && old_mode == DOS_OPEN_RDONLY &&
300 old_deny == DENY_DOS && new_deny == DENY_DOS) {
303 if (new_deny == DENY_FCB && old_deny == DENY_DOS) {
304 if (isexe) return AFAIL;
305 if (old_mode == DOS_OPEN_RDONLY) return AFAIL;
308 if (old_mode == DOS_OPEN_RDONLY && old_deny == DENY_DOS) {
309 if (new_deny == DENY_FCB || new_deny == DENY_READ) {
310 if (isexe) return AREAD;
314 if (old_deny == DENY_FCB) {
315 if (new_deny == DENY_DOS || new_deny == DENY_FCB) return AALL;
320 if (old_deny == DENY_DOS || new_deny == DENY_DOS ||
321 old_deny == DENY_FCB || new_deny == DENY_FCB) {
323 if (old_deny == DENY_FCB || new_deny == DENY_FCB) {
326 if (old_deny == DENY_DOS) {
327 if (new_deny == DENY_READ &&
328 (old_mode == DOS_OPEN_RDONLY ||
329 old_mode == DOS_OPEN_RDWR)) {
332 if (new_deny == DENY_WRITE &&
333 (old_mode == DOS_OPEN_WRONLY ||
334 old_mode == DOS_OPEN_RDWR)) {
339 if (old_deny == DENY_NONE) return AALL;
340 if (old_deny == DENY_READ) return AWRITE;
341 if (old_deny == DENY_WRITE) return AREAD;
343 /* it isn't a exe, dll, sym or com file */
344 if (old_deny == new_deny && same_pid)
347 if (old_deny == DENY_READ || new_deny == DENY_READ) return AFAIL;
348 if (old_mode == DOS_OPEN_RDONLY) return(AREAD);
356 if (old_deny==DENY_WRITE && old_mode==DOS_OPEN_RDONLY) return(AREAD);
357 if (old_deny==DENY_READ && old_mode==DOS_OPEN_RDONLY) return(AWRITE);
358 if (old_deny==DENY_NONE && old_mode==DOS_OPEN_RDONLY) return(AALL);
361 if (old_deny==DENY_WRITE && old_mode==DOS_OPEN_WRONLY) return(AREAD);
362 if (old_deny==DENY_READ && old_mode==DOS_OPEN_WRONLY) return(AWRITE);
363 if (old_deny==DENY_NONE && old_mode==DOS_OPEN_WRONLY) return(AALL);
366 if (old_deny==DENY_WRITE) return(AREAD);
367 if (old_deny==DENY_READ) return(AWRITE);
368 if (old_deny==DENY_NONE) return(AALL);
375 /****************************************************************************
376 check if we can open a file with a share mode
377 ****************************************************************************/
379 static BOOL check_share_mode(connection_struct *conn, share_mode_entry *share, int share_mode, uint32 desired_access,
380 const char *fname, BOOL fcbopen, int *flags)
382 int deny_mode = GET_DENY_MODE(share_mode);
383 int old_open_mode = GET_OPEN_MODE(share->share_mode);
384 int old_deny_mode = GET_DENY_MODE(share->share_mode);
387 * share modes = false means don't bother to check for
388 * DENY mode conflict. This is a *really* bad idea :-). JRA.
391 if(!lp_share_modes(SNUM(conn)))
395 * Don't allow any opens once the delete on close flag has been
399 if (GET_DELETE_ON_CLOSE_FLAG(share->share_mode)) {
400 DEBUG(5,("check_share_mode: Failing open on file %s as delete on close flag is set.\n",
402 unix_ERR_class = ERRDOS;
403 unix_ERR_code = ERRnoaccess;
404 unix_ERR_ntstatus = NT_STATUS_DELETE_PENDING;
408 /* this is a nasty hack, but necessary until we rewrite our open
409 handling to use a NTCreateX call as the basic call.
410 NT may open a file with neither read nor write access, and in
411 this case it expects the open not to conflict with any
412 existing deny modes. This happens (for example) during a
413 "xcopy /o" where the second file descriptor is used for
419 * This is a bit wierd - the test for desired access not having the
420 * critical bits seems seems odd. Firstly, if both opens have no
421 * critical bits then always ignore. Then check the "allow delete"
422 * then check for either. This probably isn't quite right yet but
423 * gets us much closer. JRA.
427 * If desired_access doesn't contain READ_DATA,WRITE_DATA,APPEND_DATA or EXECUTE
428 * and the existing desired_acces then share modes don't conflict.
431 if ( !(desired_access & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) &&
432 !(share->desired_access & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ) {
435 * Wrinkle discovered by smbtorture....
436 * If both are non-io open and requester is asking for delete and current open has delete access
437 * but neither open has allowed file share delete then deny.... this is very strange and
438 * seems to be the only case in which non-io opens conflict. JRA.
441 if ((desired_access & DELETE_ACCESS) && (share->desired_access & DELETE_ACCESS) &&
442 (!GET_ALLOW_SHARE_DELETE(share->share_mode) || !GET_ALLOW_SHARE_DELETE(share_mode))) {
443 DEBUG(5,("check_share_mode: Failing open on file %s as delete access requests conflict.\n",
445 unix_ERR_class = ERRDOS;
446 unix_ERR_code = ERRbadshare;
451 DEBUG(5,("check_share_mode: Allowing open on file %s as both desired access (0x%x) \
452 and existing desired access (0x%x) are non-data opens\n",
453 fname, (unsigned int)desired_access, (unsigned int)share->desired_access ));
458 * If delete access was requested and the existing share mode doesn't have
459 * ALLOW_SHARE_DELETE then deny.
462 if ((desired_access & DELETE_ACCESS) && !GET_ALLOW_SHARE_DELETE(share->share_mode)) {
463 DEBUG(5,("check_share_mode: Failing open on file %s as delete access requested and allow share delete not set.\n",
465 unix_ERR_class = ERRDOS;
466 unix_ERR_code = ERRbadshare;
472 * The inverse of the above.
473 * If delete access was granted and the new share mode doesn't have
474 * ALLOW_SHARE_DELETE then deny.
477 if ((share->desired_access & DELETE_ACCESS) && !GET_ALLOW_SHARE_DELETE(share_mode)) {
478 DEBUG(5,("check_share_mode: Failing open on file %s as delete access granted and allow share delete not requested.\n",
480 unix_ERR_class = ERRDOS;
481 unix_ERR_code = ERRbadshare;
487 * If desired_access doesn't contain READ_DATA,WRITE_DATA,APPEND_DATA or EXECUTE
488 * then share modes don't conflict. Likewise with existing desired access.
491 if ( !(desired_access & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
492 !(share->desired_access & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ) {
493 DEBUG(5,("check_share_mode: Allowing open on file %s as desired access (0x%x) doesn't conflict with\
494 existing desired access (0x%x).\n", fname, (unsigned int)desired_access, (unsigned int)share->desired_access ));
499 int access_allowed = access_table(deny_mode,old_deny_mode,old_open_mode,
500 (share->pid == sys_getpid()),is_executable(fname));
502 if ((access_allowed == AFAIL) ||
503 (!fcbopen && (access_allowed == AREAD && *flags == O_RDWR)) ||
504 (access_allowed == AREAD && *flags != O_RDONLY) ||
505 (access_allowed == AWRITE && *flags != O_WRONLY)) {
507 DEBUG(2,("Share violation on file (%d,%d,%d,%d,%s,fcbopen = %d, flags = %d) = %d\n",
508 deny_mode,old_deny_mode,old_open_mode,
509 (int)share->pid,fname, fcbopen, *flags, access_allowed));
511 unix_ERR_class = ERRDOS;
512 unix_ERR_code = ERRbadshare;
517 if (access_allowed == AREAD)
520 if (access_allowed == AWRITE)
528 /****************************************************************************
529 Deal with open deny mode and oplock break processing.
530 Invarient: Share mode must be locked on entry and exit.
531 Returns -1 on error, or number of share modes on success (may be zero).
532 ****************************************************************************/
534 static int open_mode_check(connection_struct *conn, const char *fname, SMB_DEV_T dev,
536 uint32 desired_access,
537 int share_mode, int *p_flags, int *p_oplock_request,
538 BOOL *p_all_current_opens_are_level_II)
542 int oplock_contention_count = 0;
543 share_mode_entry *old_shares = 0;
544 BOOL fcbopen = False;
547 if(GET_OPEN_MODE(share_mode) == DOS_OPEN_FCB)
550 num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
552 if(num_share_modes == 0)
556 * Check if the share modes will give us access.
560 share_mode_entry broken_entry;
562 broke_oplock = False;
563 *p_all_current_opens_are_level_II = True;
565 for(i = 0; i < num_share_modes; i++) {
566 share_mode_entry *share_entry = &old_shares[i];
569 * By observation of NetBench, oplocks are broken *before* share
570 * modes are checked. This allows a file to be closed by the client
571 * if the share mode would deny access and the client has an oplock.
572 * Check if someone has an oplock on this file. If so we must break
573 * it before continuing.
576 if((*p_oplock_request && EXCLUSIVE_OPLOCK_TYPE(share_entry->op_type)) ||
577 (!*p_oplock_request && (share_entry->op_type != NO_OPLOCK))) {
581 DEBUG(5,("open_mode_check: oplock_request = %d, breaking oplock (%x) on file %s, \
582 dev = %x, inode = %.0f\n", *p_oplock_request, share_entry->op_type, fname, (unsigned int)dev, (double)inode));
584 /* Oplock break - unlock to request it. */
585 unlock_share_entry(conn, dev, inode);
587 opb_ret = request_oplock_break(share_entry);
590 lock_share_entry(conn, dev, inode);
592 if(opb_ret == False) {
593 DEBUG(0,("open_mode_check: FAILED when breaking oplock (%x) on file %s, \
594 dev = %x, inode = %.0f\n", old_shares[i].op_type, fname, (unsigned int)dev, (double)inode));
595 SAFE_FREE(old_shares);
597 unix_ERR_class = ERRDOS;
598 unix_ERR_code = ERRbadshare;
603 broken_entry = *share_entry;
606 } else if (!LEVEL_II_OPLOCK_TYPE(share_entry->op_type)) {
607 *p_all_current_opens_are_level_II = False;
610 /* someone else has a share lock on it, check to see if we can too */
611 if (!check_share_mode(conn, share_entry, share_mode, desired_access,
612 fname, fcbopen, p_flags)) {
613 SAFE_FREE(old_shares);
621 SAFE_FREE(old_shares);
622 num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
623 oplock_contention_count++;
625 /* Paranoia check that this is no longer an exlusive entry. */
626 for(i = 0; i < num_share_modes; i++) {
627 share_mode_entry *share_entry = &old_shares[i];
629 if (share_modes_identical(&broken_entry, share_entry) &&
630 EXCLUSIVE_OPLOCK_TYPE(share_entry->op_type) ) {
633 * This should not happen. The target left this oplock
634 * as exlusive.... The process *must* be dead....
637 DEBUG(0,("open_mode_check: exlusive oplock left by process %d after break ! For file %s, \
638 dev = %x, inode = %.0f. Deleting it to continue...\n", (int)broken_entry.pid, fname, (unsigned int)dev, (double)inode));
640 if (process_exists(broken_entry.pid)) {
641 DEBUG(0,("open_mode_check: Existent process %d left active oplock.\n",
645 if (del_share_entry(dev, inode, &broken_entry, NULL) == -1) {
647 unix_ERR_class = ERRDOS;
648 unix_ERR_code = ERRbadshare;
653 * We must reload the share modes after deleting the
654 * other process's entry.
657 SAFE_FREE(old_shares);
658 num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
661 } /* end for paranoia... */
662 } /* end if broke_oplock */
664 } while(broke_oplock);
667 SAFE_FREE(old_shares);
670 * Refuse to grant an oplock in case the contention limit is
671 * reached when going through the lock list multiple times.
674 if(oplock_contention_count >= lp_oplock_contention_limit(SNUM(conn))) {
675 *p_oplock_request = 0;
676 DEBUG(4,("open_mode_check: oplock contention = %d. Not granting oplock.\n",
677 oplock_contention_count ));
680 return num_share_modes;
683 /****************************************************************************
684 set a kernel flock on a file for NFS interoperability
685 this requires a patch to Linux
686 ****************************************************************************/
687 static void kernel_flock(files_struct *fsp, int deny_mode)
689 #if HAVE_KERNEL_SHARE_MODES
691 if (deny_mode == DENY_READ) kernel_mode = LOCK_MAND|LOCK_WRITE;
692 else if (deny_mode == DENY_WRITE) kernel_mode = LOCK_MAND|LOCK_READ;
693 else if (deny_mode == DENY_ALL) kernel_mode = LOCK_MAND;
694 if (kernel_mode) flock(fsp->fd, kernel_mode);
700 static BOOL open_match_attributes(connection_struct *conn, char *path, mode_t existing_mode, mode_t new_mode)
702 uint32 old_dos_mode, new_dos_mode;
703 SMB_STRUCT_STAT sbuf;
707 sbuf.st_mode = existing_mode;
708 old_dos_mode = dos_mode(conn, path, &sbuf);
710 sbuf.st_mode = new_mode;
711 new_dos_mode = dos_mode(conn, path, &sbuf);
713 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
714 if (lp_map_system(SNUM(conn))) {
715 if ((old_dos_mode & FILE_ATTRIBUTE_SYSTEM) != (new_dos_mode & FILE_ATTRIBUTE_SYSTEM))
718 if (lp_map_hidden(SNUM(conn))) {
719 if ((old_dos_mode & FILE_ATTRIBUTE_HIDDEN) != (new_dos_mode & FILE_ATTRIBUTE_HIDDEN))
725 /****************************************************************************
726 Open a file with a share mode. On output from this open we are guarenteeing
728 ****************************************************************************/
729 files_struct *open_file_shared(connection_struct *conn,char *fname, SMB_STRUCT_STAT *psbuf,
730 int share_mode,int ofun, mode_t mode,int oplock_request,
731 int *Access,int *action)
733 return open_file_shared1(conn, fname, psbuf, 0, share_mode, ofun, mode,
734 oplock_request, Access, action);
737 /****************************************************************************
738 Open a file with a share mode. On output from this open we are guarenteeing
740 ****************************************************************************/
741 files_struct *open_file_shared1(connection_struct *conn,char *fname, SMB_STRUCT_STAT *psbuf,
742 uint32 desired_access,
743 int share_mode,int ofun, mode_t mode,int oplock_request,
744 int *Access,int *action)
748 int deny_mode = GET_DENY_MODE(share_mode);
749 BOOL allow_share_delete = GET_ALLOW_SHARE_DELETE(share_mode);
750 BOOL delete_on_close = GET_DELETE_ON_CLOSE_FLAG(share_mode);
751 BOOL file_existed = VALID_STAT(*psbuf);
752 BOOL fcbopen = False;
753 BOOL def_acl = False;
756 int num_share_modes = 0;
757 BOOL all_current_opens_are_level_II = False;
758 BOOL fsp_open = False;
759 files_struct *fsp = NULL;
764 /* printers are handled completely differently. Most of the passed parameters are
767 *Access = DOS_OPEN_WRONLY;
769 *action = FILE_WAS_CREATED;
770 return print_fsp_open(conn, fname);
773 fsp = file_new(conn);
777 DEBUG(10,("open_file_shared: fname = %s, share_mode = %x, ofun = %x, mode = %o, oplock request = %d\n",
778 fname, share_mode, ofun, (int)mode, oplock_request ));
780 if (!check_name(fname,conn)) {
785 /* ignore any oplock requests if oplocks are disabled */
786 if (!lp_oplocks(SNUM(conn)) || global_client_failed_oplock_break) {
790 /* this is for OS/2 EAs - try and say we don't support them */
791 if (strstr(fname,".+,;=[].")) {
792 unix_ERR_class = ERRDOS;
793 /* OS/2 Workplace shell fix may be main code stream in a later release. */
794 #if 1 /* OS2_WPS_FIX - Recent versions of OS/2 need this. */
795 unix_ERR_code = ERRcannotopen;
796 #else /* OS2_WPS_FIX */
797 unix_ERR_code = ERROR_EAS_NOT_SUPPORTED;
798 #endif /* OS2_WPS_FIX */
800 DEBUG(5,("open_file_shared: OS/2 EA's are not supported.\n"));
805 if ((GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_FAIL) && file_existed) {
806 DEBUG(5,("open_file_shared: create new requested for file %s and file already exists.\n",
813 if (CAN_WRITE(conn) && (GET_FILE_CREATE_DISPOSITION(ofun) == FILE_CREATE_IF_NOT_EXIST))
816 if (CAN_WRITE(conn) && (GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_TRUNCATE))
819 /* We only care about matching attributes on file exists and truncate. */
820 if (file_existed && (GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_TRUNCATE)) {
821 if (!open_match_attributes(conn, fname, psbuf->st_mode, mode)) {
822 DEBUG(5,("open_file_shared: attributes missmatch for file %s (0%o, 0%o)\n",
823 fname, psbuf->st_mode, mode ));
830 if (GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_FAIL)
833 /* note that we ignore the append flag as
834 append does not mean the same thing under dos and unix */
836 switch (GET_OPEN_MODE(share_mode)) {
837 case DOS_OPEN_WRONLY:
839 if (desired_access == 0)
840 desired_access = FILE_WRITE_DATA;
845 if (desired_access == 0)
846 desired_access = FILE_READ_DATA|FILE_WRITE_DATA;
850 if (desired_access == 0)
851 desired_access = FILE_READ_DATA|FILE_WRITE_DATA;
855 if (desired_access == 0)
856 desired_access = FILE_READ_DATA;
861 if (GET_FILE_SYNC_OPENMODE(share_mode)) {
866 if (flags != O_RDONLY && file_existed &&
867 (!CAN_WRITE(conn) || IS_DOS_READONLY(dos_mode(conn,fname,psbuf)))) {
869 DEBUG(5,("open_file_shared: read/write access requested for file %s on read only %s\n",
870 fname, !CAN_WRITE(conn) ? "share" : "file" ));
878 if (deny_mode > DENY_NONE && deny_mode!=DENY_FCB) {
879 DEBUG(2,("Invalid deny mode %d on file %s\n",deny_mode,fname));
888 inode = psbuf->st_ino;
890 lock_share_entry(conn, dev, inode);
892 num_share_modes = open_mode_check(conn, fname, dev, inode,
895 &flags, &oplock_request, &all_current_opens_are_level_II);
896 if(num_share_modes == -1) {
899 * This next line is a subtlety we need for MS-Access. If a file open will
900 * fail due to share permissions and also for security (access)
901 * reasons, we need to return the access failed error, not the
902 * share error. This means we must attempt to open the file anyway
903 * in order to get the UNIX access error - even if we're going to
904 * fail the open for share reasons. This is bad, as we're burning
905 * another fd if there are existing locks but there's nothing else
906 * we can do. We also ensure we're not going to create or tuncate
907 * the file as we only want an access decision at this stage. JRA.
909 fsp_open = open_file(fsp,conn,fname,psbuf,
910 flags|(flags2&~(O_TRUNC|O_CREAT)),mode,desired_access);
912 DEBUG(4,("open_file_shared : share_mode deny - calling open_file with \
913 flags=0x%X flags2=0x%X mode=0%o returned %d\n",
914 flags,(flags2&~(O_TRUNC|O_CREAT)),(int)mode,(int)fsp_open ));
916 unlock_share_entry(conn, dev, inode);
924 * We exit this block with the share entry *locked*.....
929 * Ensure we pay attention to default ACLs on directories if required.
932 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
933 (def_acl = directory_has_default_acl(conn, parent_dirname(fname))))
936 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o\n",
937 flags,flags2,(int)mode));
940 * open_file strips any O_TRUNC flags itself.
943 fsp_open = open_file(fsp,conn,fname,psbuf,flags|flags2,mode,desired_access);
945 if (!fsp_open && (flags == O_RDWR) && (errno != ENOENT) && fcbopen) {
946 if((fsp_open = open_file(fsp,conn,fname,psbuf,O_RDONLY,mode,desired_access)) == True)
952 unlock_share_entry(conn, dev, inode);
958 * Deal with the race condition where two smbd's detect the file doesn't
959 * exist and do the create at the same time. One of them will win and
960 * set a share mode, the other (ie. this one) should check if the
961 * requested share mode for this create is allowed.
966 lock_share_entry_fsp(fsp);
968 num_share_modes = open_mode_check(conn, fname, dev, inode,
971 &flags, &oplock_request, &all_current_opens_are_level_II);
973 if(num_share_modes == -1) {
974 unlock_share_entry_fsp(fsp);
981 * If there are any share modes set then the file *did*
982 * exist. Ensure we return the correct value for action.
985 if (num_share_modes > 0)
989 * We exit this block with the share entry *locked*.....
993 /* note that we ignore failure for the following. It is
994 basically a hack for NFS, and NFS will never set one of
995 these only read them. Nobody but Samba can ever set a deny
996 mode and we have already checked our more authoritative
997 locking database for permission to set this deny mode. If
998 the kernel refuses the operations then the kernel is wrong */
999 kernel_flock(fsp, deny_mode);
1002 * At this point onwards, we can guarentee that the share entry
1003 * is locked, whether we created the file or not, and that the
1004 * deny mode is compatible with all current opens.
1008 * If requested, truncate the file.
1011 if (flags2&O_TRUNC) {
1013 * We are modifing the file after open - update the stat struct..
1015 if ((truncate_unless_locked(conn,fsp) == -1) || (vfs_fstat(fsp,fsp->fd,psbuf)==-1)) {
1016 unlock_share_entry_fsp(fsp);
1025 open_mode = DOS_OPEN_RDONLY;
1028 open_mode = DOS_OPEN_RDWR;
1031 open_mode = DOS_OPEN_WRONLY;
1035 fsp->share_mode = SET_DENY_MODE(deny_mode) |
1036 SET_OPEN_MODE(open_mode) |
1037 SET_ALLOW_SHARE_DELETE(allow_share_delete);
1039 DEBUG(10,("open_file_shared : share_mode = %x\n", fsp->share_mode ));
1042 (*Access) = open_mode;
1045 if (file_existed && !(flags2 & O_TRUNC))
1046 *action = FILE_WAS_OPENED;
1048 *action = FILE_WAS_CREATED;
1049 if (file_existed && (flags2 & O_TRUNC))
1050 *action = FILE_WAS_OVERWRITTEN;
1054 * Setup the oplock info in both the shared memory and
1058 if(oplock_request && (num_share_modes == 0) &&
1059 !IS_VETO_OPLOCK_PATH(conn,fname) && set_file_oplock(fsp, oplock_request) ) {
1060 port = global_oplock_port;
1061 } else if (oplock_request && all_current_opens_are_level_II) {
1062 port = global_oplock_port;
1063 oplock_request = LEVEL_II_OPLOCK;
1064 set_file_oplock(fsp, oplock_request);
1070 set_share_mode(fsp, port, oplock_request);
1072 if (delete_on_close) {
1073 NTSTATUS result = set_delete_on_close_internal(fsp, delete_on_close);
1075 if (NT_STATUS_V(result) != NT_STATUS_V(NT_STATUS_OK)) {
1076 /* Remember to delete the mode we just added. */
1077 del_share_mode(fsp, NULL);
1078 unlock_share_entry_fsp(fsp);
1086 * Take care of inherited ACLs on created files - if default ACL not
1090 if (!file_existed && !def_acl && (conn->vfs_ops.fchmod_acl != NULL)) {
1091 int saved_errno = errno; /* We might get ENOSYS in the next call.. */
1092 if (conn->vfs_ops.fchmod_acl(fsp, fsp->fd, mode) == -1 && errno == ENOSYS)
1093 errno = saved_errno; /* Ignore ENOSYS */
1096 unlock_share_entry_fsp(fsp);
1098 conn->num_files_open++;
1103 /****************************************************************************
1104 Open a file for for write to ensure that we can fchmod it.
1105 ****************************************************************************/
1107 files_struct *open_file_fchmod(connection_struct *conn, const char *fname, SMB_STRUCT_STAT *psbuf)
1109 files_struct *fsp = NULL;
1112 if (!VALID_STAT(*psbuf))
1115 fsp = file_new(conn);
1119 /* note! we must use a non-zero desired access or we don't get
1120 a real file descriptor. Oh what a twisted web we weave. */
1121 fsp_open = open_file(fsp,conn,fname,psbuf,O_WRONLY,0,FILE_WRITE_DATA);
1124 * This is not a user visible file open.
1125 * Don't set a share mode and don't increment
1126 * the conn->num_files_open.
1137 /****************************************************************************
1138 Close the fchmod file fd - ensure no locks are lost.
1139 ****************************************************************************/
1141 int close_file_fchmod(files_struct *fsp)
1143 int ret = fd_close(fsp->conn, fsp);
1148 /****************************************************************************
1149 Open a directory from an NT SMB call.
1150 ****************************************************************************/
1152 files_struct *open_directory(connection_struct *conn, char *fname, SMB_STRUCT_STAT *psbuf,
1153 uint32 desired_access, int share_mode, int smb_ofun, mode_t unixmode, int *action)
1155 extern struct current_user current_user;
1156 BOOL got_stat = False;
1157 files_struct *fsp = file_new(conn);
1158 BOOL delete_on_close = GET_DELETE_ON_CLOSE_FLAG(share_mode);
1163 fsp->conn = conn; /* The vfs_fXXX() macros need this. */
1165 if (VALID_STAT(*psbuf))
1168 if (got_stat && (GET_FILE_OPEN_DISPOSITION(smb_ofun) == FILE_EXISTS_FAIL)) {
1170 errno = EEXIST; /* Setup so correct error is returned to client. */
1174 if (GET_FILE_CREATE_DISPOSITION(smb_ofun) == FILE_CREATE_IF_NOT_EXIST) {
1178 if(!S_ISDIR(psbuf->st_mode)) {
1179 DEBUG(0,("open_directory: %s is not a directory !\n", fname ));
1184 *action = FILE_WAS_OPENED;
1189 * Try and create the directory.
1192 if(!CAN_WRITE(conn)) {
1193 DEBUG(2,("open_directory: failing create on read-only share\n"));
1199 if(vfs_mkdir(conn,fname, unix_mode(conn,aDIR, fname)) < 0) {
1200 DEBUG(2,("open_directory: unable to create %s. Error was %s\n",
1201 fname, strerror(errno) ));
1206 if(vfs_stat(conn,fname, psbuf) != 0) {
1211 *action = FILE_WAS_CREATED;
1217 * Don't create - just check that it *was* a directory.
1221 DEBUG(3,("open_directory: unable to stat name = %s. Error was %s\n",
1222 fname, strerror(errno) ));
1227 if(!S_ISDIR(psbuf->st_mode)) {
1228 DEBUG(0,("open_directory: %s is not a directory !\n", fname ));
1233 *action = FILE_WAS_OPENED;
1236 DEBUG(5,("open_directory: opening directory %s\n", fname));
1239 * Setup the files_struct for it.
1242 fsp->mode = psbuf->st_mode;
1243 fsp->inode = psbuf->st_ino;
1244 fsp->dev = psbuf->st_dev;
1245 fsp->size = psbuf->st_size;
1246 fsp->vuid = current_user.vuid;
1248 fsp->can_lock = True;
1249 fsp->can_read = False;
1250 fsp->can_write = False;
1251 fsp->share_mode = share_mode;
1252 fsp->desired_access = desired_access;
1253 fsp->print_file = False;
1254 fsp->modified = False;
1255 fsp->oplock_type = NO_OPLOCK;
1256 fsp->sent_oplock_break = NO_BREAK_SENT;
1257 fsp->is_directory = True;
1258 fsp->directory_delete_on_close = False;
1260 string_set(&fsp->fsp_name,fname);
1262 if (delete_on_close) {
1263 NTSTATUS result = set_delete_on_close_internal(fsp, delete_on_close);
1265 if (NT_STATUS_V(result) != NT_STATUS_V(NT_STATUS_OK)) {
1270 conn->num_files_open++;
1276 Old code - I have replaced with correct desired_access checking. JRA.
1278 /*******************************************************************
1279 Check if the share mode on a file allows it to be deleted or unlinked.
1280 Return True if sharing doesn't prevent the operation.
1281 ********************************************************************/
1283 BOOL check_file_sharing(connection_struct *conn,char *fname, BOOL rename_op)
1287 share_mode_entry *old_shares = 0;
1288 int num_share_modes;
1289 SMB_STRUCT_STAT sbuf;
1290 pid_t pid = sys_getpid();
1294 if (vfs_stat(conn,fname,&sbuf) == -1)
1298 inode = sbuf.st_ino;
1300 lock_share_entry(conn, dev, inode);
1301 num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
1304 * Check if the share modes will give us access.
1307 if(num_share_modes != 0) {
1312 broke_oplock = False;
1313 for(i = 0; i < num_share_modes; i++) {
1314 share_mode_entry *share_entry = &old_shares[i];
1317 * Break oplocks before checking share modes. See comment in
1318 * open_file_shared for details.
1319 * Check if someone has an oplock on this file. If so we must
1320 * break it before continuing.
1322 if(BATCH_OPLOCK_TYPE(share_entry->op_type)) {
1324 DEBUG(5,("check_file_sharing: breaking oplock (%x) on file %s, \
1325 dev = %x, inode = %.0f\n", share_entry->op_type, fname, (unsigned int)dev, (double)inode));
1327 /* Oplock break.... */
1328 unlock_share_entry(conn, dev, inode);
1330 if(request_oplock_break(share_entry) == False) {
1331 DEBUG(0,("check_file_sharing: FAILED when breaking oplock (%x) on file %s, \
1332 dev = %x, inode = %.0f\n", old_shares[i].op_type, fname, (unsigned int)dev, (double)inode));
1334 SAFE_FREE(old_shares);
1337 lock_share_entry(conn, dev, inode);
1338 broke_oplock = True;
1343 * If this is a delete request and ALLOW_SHARE_DELETE is set then allow
1344 * this to proceed. This takes precedence over share modes.
1347 if(!rename_op && GET_ALLOW_SHARE_DELETE(share_entry->share_mode))
1351 * Someone else has a share lock on it, check to see
1354 if ((GET_DENY_MODE(share_entry->share_mode) != DENY_DOS) ||
1355 (share_entry->pid != pid))
1361 SAFE_FREE(old_shares);
1362 num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
1364 } while(broke_oplock);
1368 * XXXX exactly what share mode combinations should be allowed for
1369 * deleting/renaming?
1373 * If we got here then either there were no share modes or
1374 * all share modes were DENY_DOS and the pid == getpid() or
1375 * delete access was requested and all share modes had the
1376 * ALLOW_SHARE_DELETE bit set (takes precedence over other
1384 unlock_share_entry(conn, dev, inode);
1385 SAFE_FREE(old_shares);