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)
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 char *fname1,SMB_STRUCT_STAT *psbuf,int flags,mode_t mode)
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 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
146 * We can't actually truncate here as the file may be locked.
147 * open_file_shared will take care of the truncate later. JRA.
150 local_flags &= ~O_TRUNC;
152 /* actually do the open */
153 fsp->fd = fd_open(conn, fname, local_flags, mode);
156 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) (flags=%d)\n",
157 fname,strerror(errno),local_flags,flags));
158 check_for_pipe(fname);
162 if (!VALID_STAT(*psbuf)) {
163 if (vfs_fstat(fsp,fsp->fd,psbuf) == -1) {
164 DEBUG(0,("Error doing fstat on open file %s (%s)\n", fname,strerror(errno) ));
171 * POSIX allows read-only opens of directories. We don't
172 * want to do this (we use a different code path for this)
173 * so catch a directory open and return an EISDIR. JRA.
176 if(S_ISDIR(psbuf->st_mode)) {
182 fsp->mode = psbuf->st_mode;
183 fsp->inode = psbuf->st_ino;
184 fsp->dev = psbuf->st_dev;
185 fsp->vuid = current_user.vuid;
186 fsp->size = psbuf->st_size;
188 fsp->can_lock = True;
189 fsp->can_read = ((flags & O_WRONLY)==0);
190 fsp->can_write = ((flags & (O_WRONLY|O_RDWR))!=0);
192 fsp->print_file = False;
193 fsp->modified = False;
194 fsp->oplock_type = NO_OPLOCK;
195 fsp->sent_oplock_break = NO_BREAK_SENT;
196 fsp->is_directory = False;
197 fsp->stat_open = False;
198 fsp->directory_delete_on_close = False;
200 string_set(&fsp->fsp_name,fname);
201 fsp->wcp = NULL; /* Write cache pointer. */
203 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
204 *current_user_info.smb_name ? current_user_info.smb_name : conn->user,fsp->fsp_name,
205 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
206 conn->num_files_open + 1));
211 /****************************************************************************
213 Helper for open_file_shared.
214 Truncate a file after checking locking; close file if locked.
215 **************************************************************************/
217 static int truncate_unless_locked(struct connection_struct *conn, files_struct *fsp)
219 SMB_BIG_UINT mask = (SMB_BIG_UINT)-1;
221 if (is_locked(fsp,fsp->conn,mask,0,WRITE_LOCK,True)){
223 unix_ERR_class = ERRDOS;
224 unix_ERR_code = ERRlock;
227 return conn->vfs_ops.ftruncate(fsp,fsp->fd,0);
231 /*******************************************************************
232 return True if the filename is one of the special executable types
233 ********************************************************************/
234 static BOOL is_executable(const char *fname)
236 if ((fname = strrchr_m(fname,'.'))) {
237 if (strequal(fname,".com") ||
238 strequal(fname,".dll") ||
239 strequal(fname,".exe") ||
240 strequal(fname,".sym")) {
247 enum {AFAIL,AREAD,AWRITE,AALL};
249 /*******************************************************************
250 reproduce the share mode access table
251 this is horrendoously complex, and really can't be justified on any
252 rational grounds except that this is _exactly_ what NT does. See
253 the DENY1 and DENY2 tests in smbtorture for a comprehensive set of
255 ********************************************************************/
256 static int access_table(int new_deny,int old_deny,int old_mode,
257 BOOL same_pid, BOOL isexe)
259 if (new_deny == DENY_ALL || old_deny == DENY_ALL) return(AFAIL);
262 if (isexe && old_mode == DOS_OPEN_RDONLY &&
263 old_deny == DENY_DOS && new_deny == DENY_READ) {
266 if (!isexe && old_mode == DOS_OPEN_RDONLY &&
267 old_deny == DENY_DOS && new_deny == DENY_DOS) {
270 if (new_deny == DENY_FCB && old_deny == DENY_DOS) {
271 if (isexe) return AFAIL;
272 if (old_mode == DOS_OPEN_RDONLY) return AFAIL;
275 if (old_mode == DOS_OPEN_RDONLY && old_deny == DENY_DOS) {
276 if (new_deny == DENY_FCB || new_deny == DENY_READ) {
277 if (isexe) return AREAD;
281 if (old_deny == DENY_FCB) {
282 if (new_deny == DENY_DOS || new_deny == DENY_FCB) return AALL;
287 if (old_deny == DENY_DOS || new_deny == DENY_DOS ||
288 old_deny == DENY_FCB || new_deny == DENY_FCB) {
290 if (old_deny == DENY_FCB || new_deny == DENY_FCB) {
293 if (old_deny == DENY_DOS) {
294 if (new_deny == DENY_READ &&
295 (old_mode == DOS_OPEN_RDONLY ||
296 old_mode == DOS_OPEN_RDWR)) {
299 if (new_deny == DENY_WRITE &&
300 (old_mode == DOS_OPEN_WRONLY ||
301 old_mode == DOS_OPEN_RDWR)) {
306 if (old_deny == DENY_NONE) return AALL;
307 if (old_deny == DENY_READ) return AWRITE;
308 if (old_deny == DENY_WRITE) return AREAD;
310 /* it isn't a exe, dll, sym or com file */
311 if (old_deny == new_deny && same_pid)
314 if (old_deny == DENY_READ || new_deny == DENY_READ) return AFAIL;
315 if (old_mode == DOS_OPEN_RDONLY) return(AREAD);
323 if (old_deny==DENY_WRITE && old_mode==DOS_OPEN_RDONLY) return(AREAD);
324 if (old_deny==DENY_READ && old_mode==DOS_OPEN_RDONLY) return(AWRITE);
325 if (old_deny==DENY_NONE && old_mode==DOS_OPEN_RDONLY) return(AALL);
328 if (old_deny==DENY_WRITE && old_mode==DOS_OPEN_WRONLY) return(AREAD);
329 if (old_deny==DENY_READ && old_mode==DOS_OPEN_WRONLY) return(AWRITE);
330 if (old_deny==DENY_NONE && old_mode==DOS_OPEN_WRONLY) return(AALL);
333 if (old_deny==DENY_WRITE) return(AREAD);
334 if (old_deny==DENY_READ) return(AWRITE);
335 if (old_deny==DENY_NONE) return(AALL);
342 /****************************************************************************
343 check if we can open a file with a share mode
344 ****************************************************************************/
346 static BOOL check_share_mode(connection_struct *conn, share_mode_entry *share, int share_mode,
347 const char *fname, BOOL fcbopen, int *flags)
349 int deny_mode = GET_DENY_MODE(share_mode);
350 int old_open_mode = GET_OPEN_MODE(share->share_mode);
351 int old_deny_mode = GET_DENY_MODE(share->share_mode);
354 * share modes = false means don't bother to check for
355 * DENY mode conflict. This is a *really* bad idea :-). JRA.
358 if(!lp_share_modes(SNUM(conn)))
362 * Don't allow any opens once the delete on close flag has been
366 if (GET_DELETE_ON_CLOSE_FLAG(share->share_mode)) {
367 DEBUG(5,("check_share_mode: Failing open on file %s as delete on close flag is set.\n",
369 unix_ERR_class = ERRDOS;
370 unix_ERR_code = ERRnoaccess;
375 * If delete access was requested and the existing share mode doesn't have
376 * ALLOW_SHARE_DELETE then deny.
379 if (GET_DELETE_ACCESS_REQUESTED(share_mode) && !GET_ALLOW_SHARE_DELETE(share->share_mode)) {
380 DEBUG(5,("check_share_mode: Failing open on file %s as delete access requested and allow share delete not set.\n",
382 unix_ERR_class = ERRDOS;
383 unix_ERR_code = ERRbadshare;
389 * The inverse of the above.
390 * If delete access was granted and the new share mode doesn't have
391 * ALLOW_SHARE_DELETE then deny.
394 if (GET_DELETE_ACCESS_REQUESTED(share->share_mode) && !GET_ALLOW_SHARE_DELETE(share_mode)) {
395 DEBUG(5,("check_share_mode: Failing open on file %s as delete access granted and allow share delete not requested.\n",
397 unix_ERR_class = ERRDOS;
398 unix_ERR_code = ERRbadshare;
404 int access_allowed = access_table(deny_mode,old_deny_mode,old_open_mode,
405 (share->pid == sys_getpid()),is_executable(fname));
407 if ((access_allowed == AFAIL) ||
408 (!fcbopen && (access_allowed == AREAD && *flags == O_RDWR)) ||
409 (access_allowed == AREAD && *flags != O_RDONLY) ||
410 (access_allowed == AWRITE && *flags != O_WRONLY)) {
412 DEBUG(2,("Share violation on file (%d,%d,%d,%d,%s,fcbopen = %d, flags = %d) = %d\n",
413 deny_mode,old_deny_mode,old_open_mode,
414 (int)share->pid,fname, fcbopen, *flags, access_allowed));
416 unix_ERR_class = ERRDOS;
417 unix_ERR_code = ERRbadshare;
422 if (access_allowed == AREAD)
425 if (access_allowed == AWRITE)
433 /****************************************************************************
434 Deal with open deny mode and oplock break processing.
435 Invarient: Share mode must be locked on entry and exit.
436 Returns -1 on error, or number of share modes on success (may be zero).
437 ****************************************************************************/
439 static int open_mode_check(connection_struct *conn, const char *fname, SMB_DEV_T dev,
440 SMB_INO_T inode, int share_mode, int *p_flags, int *p_oplock_request,
441 BOOL *p_all_current_opens_are_level_II)
445 int oplock_contention_count = 0;
446 share_mode_entry *old_shares = 0;
447 BOOL fcbopen = False;
450 if(GET_OPEN_MODE(share_mode) == DOS_OPEN_FCB)
453 num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
455 if(num_share_modes == 0)
459 * Check if the share modes will give us access.
463 share_mode_entry broken_entry;
465 broke_oplock = False;
466 *p_all_current_opens_are_level_II = True;
468 for(i = 0; i < num_share_modes; i++) {
469 share_mode_entry *share_entry = &old_shares[i];
472 * By observation of NetBench, oplocks are broken *before* share
473 * modes are checked. This allows a file to be closed by the client
474 * if the share mode would deny access and the client has an oplock.
475 * Check if someone has an oplock on this file. If so we must break
476 * it before continuing.
479 if((*p_oplock_request && EXCLUSIVE_OPLOCK_TYPE(share_entry->op_type)) ||
480 (!*p_oplock_request && (share_entry->op_type != NO_OPLOCK))) {
484 DEBUG(5,("open_mode_check: oplock_request = %d, breaking oplock (%x) on file %s, \
485 dev = %x, inode = %.0f\n", *p_oplock_request, share_entry->op_type, fname, (unsigned int)dev, (double)inode));
487 /* Oplock break - unlock to request it. */
488 unlock_share_entry(conn, dev, inode);
490 opb_ret = request_oplock_break(share_entry);
493 lock_share_entry(conn, dev, inode);
495 if(opb_ret == False) {
496 DEBUG(0,("open_mode_check: FAILED when breaking oplock (%x) on file %s, \
497 dev = %x, inode = %.0f\n", old_shares[i].op_type, fname, (unsigned int)dev, (double)inode));
498 SAFE_FREE(old_shares);
500 unix_ERR_class = ERRDOS;
501 unix_ERR_code = ERRbadshare;
506 broken_entry = *share_entry;
509 } else if (!LEVEL_II_OPLOCK_TYPE(share_entry->op_type)) {
510 *p_all_current_opens_are_level_II = False;
513 /* someone else has a share lock on it, check to see
516 if(check_share_mode(conn, share_entry, share_mode, fname, fcbopen, p_flags) == False) {
517 SAFE_FREE(old_shares);
525 SAFE_FREE(old_shares);
526 num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
527 oplock_contention_count++;
529 /* Paranoia check that this is no longer an exlusive entry. */
530 for(i = 0; i < num_share_modes; i++) {
531 share_mode_entry *share_entry = &old_shares[i];
533 if (share_modes_identical(&broken_entry, share_entry) &&
534 EXCLUSIVE_OPLOCK_TYPE(share_entry->op_type) ) {
537 * This should not happen. The target left this oplock
538 * as exlusive.... The process *must* be dead....
541 DEBUG(0,("open_mode_check: exlusive oplock left by process %d after break ! For file %s, \
542 dev = %x, inode = %.0f. Deleting it to continue...\n", (int)broken_entry.pid, fname, (unsigned int)dev, (double)inode));
544 if (process_exists(broken_entry.pid)) {
545 DEBUG(0,("open_mode_check: Existent process %d left active oplock.\n",
549 if (del_share_entry(dev, inode, &broken_entry, NULL) == -1) {
551 unix_ERR_class = ERRDOS;
552 unix_ERR_code = ERRbadshare;
557 * We must reload the share modes after deleting the
558 * other process's entry.
561 SAFE_FREE(old_shares);
562 num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
565 } /* end for paranoia... */
566 } /* end if broke_oplock */
568 } while(broke_oplock);
571 SAFE_FREE(old_shares);
574 * Refuse to grant an oplock in case the contention limit is
575 * reached when going through the lock list multiple times.
578 if(oplock_contention_count >= lp_oplock_contention_limit(SNUM(conn))) {
579 *p_oplock_request = 0;
580 DEBUG(4,("open_mode_check: oplock contention = %d. Not granting oplock.\n",
581 oplock_contention_count ));
584 return num_share_modes;
587 /****************************************************************************
588 set a kernel flock on a file for NFS interoperability
589 this requires a patch to Linux
590 ****************************************************************************/
591 static void kernel_flock(files_struct *fsp, int deny_mode)
593 #if HAVE_KERNEL_SHARE_MODES
595 if (deny_mode == DENY_READ) kernel_mode = LOCK_MAND|LOCK_WRITE;
596 else if (deny_mode == DENY_WRITE) kernel_mode = LOCK_MAND|LOCK_READ;
597 else if (deny_mode == DENY_ALL) kernel_mode = LOCK_MAND;
598 if (kernel_mode) flock(fsp->fd, kernel_mode);
604 /****************************************************************************
605 Open a file with a share mode. On output from this open we are guarenteeing
607 ****************************************************************************/
608 files_struct *open_file_shared(connection_struct *conn,char *fname, SMB_STRUCT_STAT *psbuf,
609 int share_mode,int ofun, mode_t mode,int oplock_request,
610 int *Access,int *action)
614 int deny_mode = GET_DENY_MODE(share_mode);
615 BOOL allow_share_delete = GET_ALLOW_SHARE_DELETE(share_mode);
616 BOOL delete_access_requested = GET_DELETE_ACCESS_REQUESTED(share_mode);
617 BOOL delete_on_close = GET_DELETE_ON_CLOSE_FLAG(share_mode);
618 BOOL file_existed = VALID_STAT(*psbuf);
619 BOOL fcbopen = False;
622 int num_share_modes = 0;
623 BOOL all_current_opens_are_level_II = False;
624 BOOL fsp_open = False;
625 files_struct *fsp = NULL;
630 /* printers are handled completely differently. Most of the passed parameters are
632 *Access = DOS_OPEN_WRONLY;
633 *action = FILE_WAS_CREATED;
634 return print_fsp_open(conn, fname);
637 fsp = file_new(conn);
641 DEBUG(10,("open_file_shared: fname = %s, share_mode = %x, ofun = %x, mode = %o, oplock request = %d\n",
642 fname, share_mode, ofun, (int)mode, oplock_request ));
644 if (!check_name(fname,conn)) {
649 /* ignore any oplock requests if oplocks are disabled */
650 if (!lp_oplocks(SNUM(conn)) || global_client_failed_oplock_break) {
654 /* this is for OS/2 EAs - try and say we don't support them */
655 if (strstr(fname,".+,;=[].")) {
656 unix_ERR_class = ERRDOS;
657 /* OS/2 Workplace shell fix may be main code stream in a later release. */
658 #if 1 /* OS2_WPS_FIX - Recent versions of OS/2 need this. */
659 unix_ERR_code = ERRcannotopen;
660 #else /* OS2_WPS_FIX */
661 unix_ERR_code = ERROR_EAS_NOT_SUPPORTED;
662 #endif /* OS2_WPS_FIX */
664 DEBUG(5,("open_file_shared: OS/2 EA's are not supported.\n"));
669 if ((GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_FAIL) && file_existed) {
670 DEBUG(5,("open_file_shared: create new requested for file %s and file already exists.\n",
677 if (CAN_WRITE(conn) && (GET_FILE_CREATE_DISPOSITION(ofun) == FILE_CREATE_IF_NOT_EXIST))
680 if (CAN_WRITE(conn) && (GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_TRUNCATE))
683 if (GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_FAIL)
686 /* note that we ignore the append flag as
687 append does not mean the same thing under dos and unix */
689 switch (GET_OPEN_MODE(share_mode)) {
690 case DOS_OPEN_WRONLY:
706 if (GET_FILE_SYNC_OPENMODE(share_mode)) {
711 if (flags != O_RDONLY && file_existed &&
712 (!CAN_WRITE(conn) || IS_DOS_READONLY(dos_mode(conn,fname,psbuf)))) {
714 DEBUG(5,("open_file_shared: read/write access requested for file %s on read only %s\n",
715 fname, !CAN_WRITE(conn) ? "share" : "file" ));
723 if (deny_mode > DENY_NONE && deny_mode!=DENY_FCB) {
724 DEBUG(2,("Invalid deny mode %d on file %s\n",deny_mode,fname));
733 inode = psbuf->st_ino;
735 lock_share_entry(conn, dev, inode);
737 num_share_modes = open_mode_check(conn, fname, dev, inode, share_mode,
738 &flags, &oplock_request, &all_current_opens_are_level_II);
739 if(num_share_modes == -1) {
742 * This next line is a subtlety we need for MS-Access. If a file open will
743 * fail due to share permissions and also for security (access)
744 * reasons, we need to return the access failed error, not the
745 * share error. This means we must attempt to open the file anyway
746 * in order to get the UNIX access error - even if we're going to
747 * fail the open for share reasons. This is bad, as we're burning
748 * another fd if there are existing locks but there's nothing else
749 * we can do. We also ensure we're not going to create or tuncate
750 * the file as we only want an access decision at this stage. JRA.
752 fsp_open = open_file(fsp,conn,fname,psbuf,flags|(flags2&~(O_TRUNC|O_CREAT)),mode);
754 DEBUG(4,("open_file_shared : share_mode deny - calling open_file with \
755 flags=0x%X flags2=0x%X mode=0%o returned %d\n",
756 flags,(flags2&~(O_TRUNC|O_CREAT)),(int)mode,(int)fsp_open ));
758 unlock_share_entry(conn, dev, inode);
766 * We exit this block with the share entry *locked*.....
770 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o\n",
771 flags,flags2,(int)mode));
774 * open_file strips any O_TRUNC flags itself.
777 fsp_open = open_file(fsp,conn,fname,psbuf,flags|flags2,mode);
779 if (!fsp_open && (flags == O_RDWR) && (errno != ENOENT) && fcbopen) {
780 if((fsp_open = open_file(fsp,conn,fname,psbuf,O_RDONLY,mode)) == True)
786 unlock_share_entry(conn, dev, inode);
792 * Deal with the race condition where two smbd's detect the file doesn't
793 * exist and do the create at the same time. One of them will win and
794 * set a share mode, the other (ie. this one) should check if the
795 * requested share mode for this create is allowed.
800 lock_share_entry_fsp(fsp);
802 num_share_modes = open_mode_check(conn, fname, dev, inode, share_mode,
803 &flags, &oplock_request, &all_current_opens_are_level_II);
805 if(num_share_modes == -1) {
806 unlock_share_entry_fsp(fsp);
813 * If there are any share modes set then the file *did*
814 * exist. Ensure we return the correct value for action.
817 if (num_share_modes > 0)
821 * We exit this block with the share entry *locked*.....
825 /* note that we ignore failure for the following. It is
826 basically a hack for NFS, and NFS will never set one of
827 these only read them. Nobody but Samba can ever set a deny
828 mode and we have already checked our more authoritative
829 locking database for permission to set this deny mode. If
830 the kernel refuses the operations then the kernel is wrong */
831 kernel_flock(fsp, deny_mode);
834 * At this point onwards, we can guarentee that the share entry
835 * is locked, whether we created the file or not, and that the
836 * deny mode is compatible with all current opens.
840 * If requested, truncate the file.
843 if (flags2&O_TRUNC) {
845 * We are modifing the file after open - update the stat struct..
847 if ((truncate_unless_locked(conn,fsp) == -1) || (vfs_fstat(fsp,fsp->fd,psbuf)==-1)) {
848 unlock_share_entry_fsp(fsp);
857 open_mode = DOS_OPEN_RDONLY;
860 open_mode = DOS_OPEN_RDWR;
863 open_mode = DOS_OPEN_WRONLY;
867 fsp->share_mode = SET_DENY_MODE(deny_mode) |
868 SET_OPEN_MODE(open_mode) |
869 SET_ALLOW_SHARE_DELETE(allow_share_delete) |
870 SET_DELETE_ACCESS_REQUESTED(delete_access_requested);
872 DEBUG(10,("open_file_shared : share_mode = %x\n", fsp->share_mode ));
875 (*Access) = open_mode;
878 if (file_existed && !(flags2 & O_TRUNC))
879 *action = FILE_WAS_OPENED;
881 *action = FILE_WAS_CREATED;
882 if (file_existed && (flags2 & O_TRUNC))
883 *action = FILE_WAS_OVERWRITTEN;
887 * Setup the oplock info in both the shared memory and
891 if(oplock_request && (num_share_modes == 0) &&
892 !IS_VETO_OPLOCK_PATH(conn,fname) && set_file_oplock(fsp, oplock_request) ) {
893 port = global_oplock_port;
894 } else if (oplock_request && all_current_opens_are_level_II) {
895 port = global_oplock_port;
896 oplock_request = LEVEL_II_OPLOCK;
897 set_file_oplock(fsp, oplock_request);
903 set_share_mode(fsp, port, oplock_request);
905 if (delete_on_close) {
906 NTSTATUS result = set_delete_on_close_internal(fsp, delete_on_close);
908 if (NT_STATUS_V(result) != NT_STATUS_V(NT_STATUS_OK)) {
909 unlock_share_entry_fsp(fsp);
917 * Take care of inherited ACLs on created files. JRA.
920 if (!file_existed && (conn->vfs_ops.fchmod_acl != NULL)) {
921 int saved_errno = errno; /* We might get ENOSYS in the next call.. */
922 if (conn->vfs_ops.fchmod_acl(fsp, fsp->fd, mode) == -1 && errno == ENOSYS)
923 errno = saved_errno; /* Ignore ENOSYS */
926 unlock_share_entry_fsp(fsp);
928 conn->num_files_open++;
933 /****************************************************************************
934 Open a file for permissions read only. Return a pseudo file entry
935 with the 'stat_open' flag set
936 ****************************************************************************/
938 files_struct *open_file_stat(connection_struct *conn, char *fname,
939 SMB_STRUCT_STAT *psbuf, int smb_ofun, int *action)
941 extern struct current_user current_user;
942 files_struct *fsp = NULL;
944 if (!VALID_STAT(*psbuf)) {
945 DEBUG(0,("open_file_stat: unable to stat name = %s. Error was %s\n", fname, strerror(errno) ));
949 if(S_ISDIR(psbuf->st_mode)) {
950 DEBUG(0,("open_file_stat: %s is a directory !\n", fname ));
954 fsp = file_new(conn);
958 *action = FILE_WAS_OPENED;
960 DEBUG(5,("open_file_stat: opening file %s as a stat entry\n", fname));
963 * Setup the files_struct for it.
966 fsp->mode = psbuf->st_mode;
967 fsp->inode = psbuf->st_ino;
968 fsp->dev = psbuf->st_dev;
969 fsp->size = psbuf->st_size;
970 fsp->vuid = current_user.vuid;
972 fsp->can_lock = False;
973 fsp->can_read = False;
974 fsp->can_write = False;
976 fsp->print_file = False;
977 fsp->modified = False;
978 fsp->oplock_type = NO_OPLOCK;
979 fsp->sent_oplock_break = NO_BREAK_SENT;
980 fsp->is_directory = False;
981 fsp->stat_open = True;
982 fsp->directory_delete_on_close = False;
984 string_set(&fsp->fsp_name,fname);
985 fsp->wcp = NULL; /* Write cache pointer. */
987 conn->num_files_open++;
992 /****************************************************************************
993 Open a file for for write to ensure that we can fchmod it.
994 ****************************************************************************/
996 files_struct *open_file_fchmod(connection_struct *conn, char *fname, SMB_STRUCT_STAT *psbuf)
998 files_struct *fsp = NULL;
1001 if (!VALID_STAT(*psbuf))
1004 fsp = file_new(conn);
1008 fsp_open = open_file(fsp,conn,fname,psbuf,O_WRONLY,0);
1011 * This is not a user visible file open.
1012 * Don't set a share mode and don't increment
1013 * the conn->num_files_open.
1024 /****************************************************************************
1025 Close the fchmod file fd - ensure no locks are lost.
1026 ****************************************************************************/
1028 int close_file_fchmod(files_struct *fsp)
1030 int ret = fd_close(fsp->conn, fsp);
1035 /****************************************************************************
1036 Open a directory from an NT SMB call.
1037 ****************************************************************************/
1039 files_struct *open_directory(connection_struct *conn, char *fname,
1040 SMB_STRUCT_STAT *psbuf, int share_mode, int smb_ofun, mode_t unixmode, int *action)
1042 extern struct current_user current_user;
1043 BOOL got_stat = False;
1044 files_struct *fsp = file_new(conn);
1045 BOOL delete_on_close = GET_DELETE_ON_CLOSE_FLAG(share_mode);
1050 fsp->conn = conn; /* The vfs_fXXX() macros need this. */
1052 if (VALID_STAT(*psbuf))
1055 if (got_stat && (GET_FILE_OPEN_DISPOSITION(smb_ofun) == FILE_EXISTS_FAIL)) {
1057 errno = EEXIST; /* Setup so correct error is returned to client. */
1061 if (GET_FILE_CREATE_DISPOSITION(smb_ofun) == FILE_CREATE_IF_NOT_EXIST) {
1065 if(!S_ISDIR(psbuf->st_mode)) {
1066 DEBUG(0,("open_directory: %s is not a directory !\n", fname ));
1071 *action = FILE_WAS_OPENED;
1076 * Try and create the directory.
1079 if(!CAN_WRITE(conn)) {
1080 DEBUG(2,("open_directory: failing create on read-only share\n"));
1086 if(vfs_mkdir(conn,fname, unix_mode(conn,aDIR, fname)) < 0) {
1087 DEBUG(2,("open_directory: unable to create %s. Error was %s\n",
1088 fname, strerror(errno) ));
1093 if(vfs_stat(conn,fname, psbuf) != 0) {
1098 *action = FILE_WAS_CREATED;
1104 * Don't create - just check that it *was* a directory.
1108 DEBUG(0,("open_directory: unable to stat name = %s. Error was %s\n",
1109 fname, strerror(errno) ));
1114 if(!S_ISDIR(psbuf->st_mode)) {
1115 DEBUG(0,("open_directory: %s is not a directory !\n", fname ));
1120 *action = FILE_WAS_OPENED;
1123 DEBUG(5,("open_directory: opening directory %s\n", fname));
1126 * Setup the files_struct for it.
1129 fsp->mode = psbuf->st_mode;
1130 fsp->inode = psbuf->st_ino;
1131 fsp->dev = psbuf->st_dev;
1132 fsp->size = psbuf->st_size;
1133 fsp->vuid = current_user.vuid;
1135 fsp->can_lock = True;
1136 fsp->can_read = False;
1137 fsp->can_write = False;
1138 fsp->share_mode = share_mode;
1139 fsp->print_file = False;
1140 fsp->modified = False;
1141 fsp->oplock_type = NO_OPLOCK;
1142 fsp->sent_oplock_break = NO_BREAK_SENT;
1143 fsp->is_directory = True;
1144 fsp->directory_delete_on_close = False;
1146 string_set(&fsp->fsp_name,fname);
1148 if (delete_on_close) {
1149 NTSTATUS result = set_delete_on_close_internal(fsp, delete_on_close);
1151 if (NT_STATUS_V(result) != NT_STATUS_V(NT_STATUS_OK)) {
1156 conn->num_files_open++;
1161 /*******************************************************************
1162 Check if the share mode on a file allows it to be deleted or unlinked.
1163 Return True if sharing doesn't prevent the operation.
1164 ********************************************************************/
1166 BOOL check_file_sharing(connection_struct *conn,char *fname, BOOL rename_op)
1170 share_mode_entry *old_shares = 0;
1171 int num_share_modes;
1172 SMB_STRUCT_STAT sbuf;
1173 pid_t pid = sys_getpid();
1177 if (vfs_stat(conn,fname,&sbuf) == -1)
1181 inode = sbuf.st_ino;
1183 lock_share_entry(conn, dev, inode);
1184 num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
1187 * Check if the share modes will give us access.
1190 if(num_share_modes != 0)
1197 broke_oplock = False;
1198 for(i = 0; i < num_share_modes; i++)
1200 share_mode_entry *share_entry = &old_shares[i];
1203 * Break oplocks before checking share modes. See comment in
1204 * open_file_shared for details.
1205 * Check if someone has an oplock on this file. If so we must
1206 * break it before continuing.
1208 if(BATCH_OPLOCK_TYPE(share_entry->op_type))
1213 /* JRA. Try removing this code to see if the new oplock changes
1214 fix the problem. I'm dubious, but Andrew is recommending we
1219 * It appears that the NT redirector may have a bug, in that
1220 * it tries to do an SMBmv on a file that it has open with a
1221 * batch oplock, and then fails to respond to the oplock break
1222 * request. This only seems to occur when the client is doing an
1223 * SMBmv to the smbd it is using - thus we try and detect this
1224 * condition by checking if the file being moved is open and oplocked by
1225 * this smbd process, and then not sending the oplock break in this
1226 * special case. If the file was open with a deny mode that
1227 * prevents the move the SMBmv will fail anyway with a share
1228 * violation error. JRA.
1230 if(rename_op && (share_entry->pid == pid))
1233 DEBUG(0,("check_file_sharing: NT redirector workaround - rename attempted on \
1234 batch oplocked file %s, dev = %x, inode = %.0f\n", fname, (unsigned int)dev, (double)inode));
1237 * This next line is a test that allows the deny-mode
1238 * processing to be skipped. This seems to be needed as
1239 * NT insists on the rename succeeding (in Office 9x no less !).
1240 * This should be removed as soon as (a) MS fix the redirector
1241 * bug or (b) NT SMB support in Samba makes NT not issue the
1242 * call (as is my fervent hope). JRA.
1250 DEBUG(5,("check_file_sharing: breaking oplock (%x) on file %s, \
1251 dev = %x, inode = %.0f\n", share_entry->op_type, fname, (unsigned int)dev, (double)inode));
1253 /* Oplock break.... */
1254 unlock_share_entry(conn, dev, inode);
1255 if(request_oplock_break(share_entry) == False)
1257 DEBUG(0,("check_file_sharing: FAILED when breaking oplock (%x) on file %s, \
1258 dev = %x, inode = %.0f\n", old_shares[i].op_type, fname, (unsigned int)dev, (double)inode));
1260 SAFE_FREE(old_shares);
1263 lock_share_entry(conn, dev, inode);
1264 broke_oplock = True;
1270 * If this is a delete request and ALLOW_SHARE_DELETE is set then allow
1271 * this to proceed. This takes precedence over share modes.
1274 if(!rename_op && GET_ALLOW_SHARE_DELETE(share_entry->share_mode))
1278 * Someone else has a share lock on it, check to see
1282 if ((GET_DENY_MODE(share_entry->share_mode) != DENY_DOS) ||
1283 (share_entry->pid != pid))
1290 SAFE_FREE(old_shares);
1291 num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
1293 } while(broke_oplock);
1296 /* XXXX exactly what share mode combinations should be allowed for
1297 deleting/renaming? */
1299 * If we got here then either there were no share modes or
1300 * all share modes were DENY_DOS and the pid == getpid() or
1301 * delete access was requested and all share modes had the
1302 * ALLOW_SHARE_DELETE bit set (takes precedence over other
1310 unlock_share_entry(conn, dev, inode);
1311 SAFE_FREE(old_shares);