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
633 *Access = DOS_OPEN_WRONLY;
635 *action = FILE_WAS_CREATED;
636 return print_fsp_open(conn, fname);
639 fsp = file_new(conn);
643 DEBUG(10,("open_file_shared: fname = %s, share_mode = %x, ofun = %x, mode = %o, oplock request = %d\n",
644 fname, share_mode, ofun, (int)mode, oplock_request ));
646 if (!check_name(fname,conn)) {
651 /* ignore any oplock requests if oplocks are disabled */
652 if (!lp_oplocks(SNUM(conn)) || global_client_failed_oplock_break) {
656 /* this is for OS/2 EAs - try and say we don't support them */
657 if (strstr(fname,".+,;=[].")) {
658 unix_ERR_class = ERRDOS;
659 /* OS/2 Workplace shell fix may be main code stream in a later release. */
660 #if 1 /* OS2_WPS_FIX - Recent versions of OS/2 need this. */
661 unix_ERR_code = ERRcannotopen;
662 #else /* OS2_WPS_FIX */
663 unix_ERR_code = ERROR_EAS_NOT_SUPPORTED;
664 #endif /* OS2_WPS_FIX */
666 DEBUG(5,("open_file_shared: OS/2 EA's are not supported.\n"));
671 if ((GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_FAIL) && file_existed) {
672 DEBUG(5,("open_file_shared: create new requested for file %s and file already exists.\n",
679 if (CAN_WRITE(conn) && (GET_FILE_CREATE_DISPOSITION(ofun) == FILE_CREATE_IF_NOT_EXIST))
682 if (CAN_WRITE(conn) && (GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_TRUNCATE))
685 if (GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_FAIL)
688 /* note that we ignore the append flag as
689 append does not mean the same thing under dos and unix */
691 switch (GET_OPEN_MODE(share_mode)) {
692 case DOS_OPEN_WRONLY:
708 if (GET_FILE_SYNC_OPENMODE(share_mode)) {
713 if (flags != O_RDONLY && file_existed &&
714 (!CAN_WRITE(conn) || IS_DOS_READONLY(dos_mode(conn,fname,psbuf)))) {
716 DEBUG(5,("open_file_shared: read/write access requested for file %s on read only %s\n",
717 fname, !CAN_WRITE(conn) ? "share" : "file" ));
725 if (deny_mode > DENY_NONE && deny_mode!=DENY_FCB) {
726 DEBUG(2,("Invalid deny mode %d on file %s\n",deny_mode,fname));
735 inode = psbuf->st_ino;
737 lock_share_entry(conn, dev, inode);
739 num_share_modes = open_mode_check(conn, fname, dev, inode, share_mode,
740 &flags, &oplock_request, &all_current_opens_are_level_II);
741 if(num_share_modes == -1) {
744 * This next line is a subtlety we need for MS-Access. If a file open will
745 * fail due to share permissions and also for security (access)
746 * reasons, we need to return the access failed error, not the
747 * share error. This means we must attempt to open the file anyway
748 * in order to get the UNIX access error - even if we're going to
749 * fail the open for share reasons. This is bad, as we're burning
750 * another fd if there are existing locks but there's nothing else
751 * we can do. We also ensure we're not going to create or tuncate
752 * the file as we only want an access decision at this stage. JRA.
754 fsp_open = open_file(fsp,conn,fname,psbuf,flags|(flags2&~(O_TRUNC|O_CREAT)),mode);
756 DEBUG(4,("open_file_shared : share_mode deny - calling open_file with \
757 flags=0x%X flags2=0x%X mode=0%o returned %d\n",
758 flags,(flags2&~(O_TRUNC|O_CREAT)),(int)mode,(int)fsp_open ));
760 unlock_share_entry(conn, dev, inode);
768 * We exit this block with the share entry *locked*.....
772 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o\n",
773 flags,flags2,(int)mode));
776 * open_file strips any O_TRUNC flags itself.
779 fsp_open = open_file(fsp,conn,fname,psbuf,flags|flags2,mode);
781 if (!fsp_open && (flags == O_RDWR) && (errno != ENOENT) && fcbopen) {
782 if((fsp_open = open_file(fsp,conn,fname,psbuf,O_RDONLY,mode)) == True)
788 unlock_share_entry(conn, dev, inode);
794 * Deal with the race condition where two smbd's detect the file doesn't
795 * exist and do the create at the same time. One of them will win and
796 * set a share mode, the other (ie. this one) should check if the
797 * requested share mode for this create is allowed.
802 lock_share_entry_fsp(fsp);
804 num_share_modes = open_mode_check(conn, fname, dev, inode, share_mode,
805 &flags, &oplock_request, &all_current_opens_are_level_II);
807 if(num_share_modes == -1) {
808 unlock_share_entry_fsp(fsp);
815 * If there are any share modes set then the file *did*
816 * exist. Ensure we return the correct value for action.
819 if (num_share_modes > 0)
823 * We exit this block with the share entry *locked*.....
827 /* note that we ignore failure for the following. It is
828 basically a hack for NFS, and NFS will never set one of
829 these only read them. Nobody but Samba can ever set a deny
830 mode and we have already checked our more authoritative
831 locking database for permission to set this deny mode. If
832 the kernel refuses the operations then the kernel is wrong */
833 kernel_flock(fsp, deny_mode);
836 * At this point onwards, we can guarentee that the share entry
837 * is locked, whether we created the file or not, and that the
838 * deny mode is compatible with all current opens.
842 * If requested, truncate the file.
845 if (flags2&O_TRUNC) {
847 * We are modifing the file after open - update the stat struct..
849 if ((truncate_unless_locked(conn,fsp) == -1) || (vfs_fstat(fsp,fsp->fd,psbuf)==-1)) {
850 unlock_share_entry_fsp(fsp);
859 open_mode = DOS_OPEN_RDONLY;
862 open_mode = DOS_OPEN_RDWR;
865 open_mode = DOS_OPEN_WRONLY;
869 fsp->share_mode = SET_DENY_MODE(deny_mode) |
870 SET_OPEN_MODE(open_mode) |
871 SET_ALLOW_SHARE_DELETE(allow_share_delete) |
872 SET_DELETE_ACCESS_REQUESTED(delete_access_requested);
874 DEBUG(10,("open_file_shared : share_mode = %x\n", fsp->share_mode ));
877 (*Access) = open_mode;
880 if (file_existed && !(flags2 & O_TRUNC))
881 *action = FILE_WAS_OPENED;
883 *action = FILE_WAS_CREATED;
884 if (file_existed && (flags2 & O_TRUNC))
885 *action = FILE_WAS_OVERWRITTEN;
889 * Setup the oplock info in both the shared memory and
893 if(oplock_request && (num_share_modes == 0) &&
894 !IS_VETO_OPLOCK_PATH(conn,fname) && set_file_oplock(fsp, oplock_request) ) {
895 port = global_oplock_port;
896 } else if (oplock_request && all_current_opens_are_level_II) {
897 port = global_oplock_port;
898 oplock_request = LEVEL_II_OPLOCK;
899 set_file_oplock(fsp, oplock_request);
905 set_share_mode(fsp, port, oplock_request);
907 if (delete_on_close) {
908 NTSTATUS result = set_delete_on_close_internal(fsp, delete_on_close);
910 if (NT_STATUS_V(result) != NT_STATUS_V(NT_STATUS_OK)) {
911 unlock_share_entry_fsp(fsp);
919 * Take care of inherited ACLs on created files. JRA.
922 if (!file_existed && (conn->vfs_ops.fchmod_acl != NULL)) {
923 int saved_errno = errno; /* We might get ENOSYS in the next call.. */
924 if (conn->vfs_ops.fchmod_acl(fsp, fsp->fd, mode) == -1 && errno == ENOSYS)
925 errno = saved_errno; /* Ignore ENOSYS */
928 unlock_share_entry_fsp(fsp);
930 conn->num_files_open++;
935 /****************************************************************************
936 Open a file for permissions read only. Return a pseudo file entry
937 with the 'stat_open' flag set
938 ****************************************************************************/
940 files_struct *open_file_stat(connection_struct *conn, char *fname,
941 SMB_STRUCT_STAT *psbuf, int smb_ofun, int *action)
943 extern struct current_user current_user;
944 files_struct *fsp = NULL;
946 if (!VALID_STAT(*psbuf)) {
947 DEBUG(0,("open_file_stat: unable to stat name = %s. Error was %s\n", fname, strerror(errno) ));
951 if(S_ISDIR(psbuf->st_mode)) {
952 DEBUG(0,("open_file_stat: %s is a directory !\n", fname ));
956 fsp = file_new(conn);
960 *action = FILE_WAS_OPENED;
962 DEBUG(5,("open_file_stat: opening file %s as a stat entry\n", fname));
965 * Setup the files_struct for it.
968 fsp->mode = psbuf->st_mode;
969 fsp->inode = psbuf->st_ino;
970 fsp->dev = psbuf->st_dev;
971 fsp->size = psbuf->st_size;
972 fsp->vuid = current_user.vuid;
974 fsp->can_lock = False;
975 fsp->can_read = False;
976 fsp->can_write = False;
978 fsp->print_file = False;
979 fsp->modified = False;
980 fsp->oplock_type = NO_OPLOCK;
981 fsp->sent_oplock_break = NO_BREAK_SENT;
982 fsp->is_directory = False;
983 fsp->stat_open = True;
984 fsp->directory_delete_on_close = False;
986 string_set(&fsp->fsp_name,fname);
987 fsp->wcp = NULL; /* Write cache pointer. */
989 conn->num_files_open++;
994 /****************************************************************************
995 Open a file for for write to ensure that we can fchmod it.
996 ****************************************************************************/
998 files_struct *open_file_fchmod(connection_struct *conn, char *fname, SMB_STRUCT_STAT *psbuf)
1000 files_struct *fsp = NULL;
1003 if (!VALID_STAT(*psbuf))
1006 fsp = file_new(conn);
1010 fsp_open = open_file(fsp,conn,fname,psbuf,O_WRONLY,0);
1013 * This is not a user visible file open.
1014 * Don't set a share mode and don't increment
1015 * the conn->num_files_open.
1026 /****************************************************************************
1027 Close the fchmod file fd - ensure no locks are lost.
1028 ****************************************************************************/
1030 int close_file_fchmod(files_struct *fsp)
1032 int ret = fd_close(fsp->conn, fsp);
1037 /****************************************************************************
1038 Open a directory from an NT SMB call.
1039 ****************************************************************************/
1041 files_struct *open_directory(connection_struct *conn, char *fname,
1042 SMB_STRUCT_STAT *psbuf, int share_mode, int smb_ofun, mode_t unixmode, int *action)
1044 extern struct current_user current_user;
1045 BOOL got_stat = False;
1046 files_struct *fsp = file_new(conn);
1047 BOOL delete_on_close = GET_DELETE_ON_CLOSE_FLAG(share_mode);
1052 fsp->conn = conn; /* The vfs_fXXX() macros need this. */
1054 if (VALID_STAT(*psbuf))
1057 if (got_stat && (GET_FILE_OPEN_DISPOSITION(smb_ofun) == FILE_EXISTS_FAIL)) {
1059 errno = EEXIST; /* Setup so correct error is returned to client. */
1063 if (GET_FILE_CREATE_DISPOSITION(smb_ofun) == FILE_CREATE_IF_NOT_EXIST) {
1067 if(!S_ISDIR(psbuf->st_mode)) {
1068 DEBUG(0,("open_directory: %s is not a directory !\n", fname ));
1073 *action = FILE_WAS_OPENED;
1078 * Try and create the directory.
1081 if(!CAN_WRITE(conn)) {
1082 DEBUG(2,("open_directory: failing create on read-only share\n"));
1088 if(vfs_mkdir(conn,fname, unix_mode(conn,aDIR, fname)) < 0) {
1089 DEBUG(2,("open_directory: unable to create %s. Error was %s\n",
1090 fname, strerror(errno) ));
1095 if(vfs_stat(conn,fname, psbuf) != 0) {
1100 *action = FILE_WAS_CREATED;
1106 * Don't create - just check that it *was* a directory.
1110 DEBUG(0,("open_directory: unable to stat name = %s. Error was %s\n",
1111 fname, strerror(errno) ));
1116 if(!S_ISDIR(psbuf->st_mode)) {
1117 DEBUG(0,("open_directory: %s is not a directory !\n", fname ));
1122 *action = FILE_WAS_OPENED;
1125 DEBUG(5,("open_directory: opening directory %s\n", fname));
1128 * Setup the files_struct for it.
1131 fsp->mode = psbuf->st_mode;
1132 fsp->inode = psbuf->st_ino;
1133 fsp->dev = psbuf->st_dev;
1134 fsp->size = psbuf->st_size;
1135 fsp->vuid = current_user.vuid;
1137 fsp->can_lock = True;
1138 fsp->can_read = False;
1139 fsp->can_write = False;
1140 fsp->share_mode = share_mode;
1141 fsp->print_file = False;
1142 fsp->modified = False;
1143 fsp->oplock_type = NO_OPLOCK;
1144 fsp->sent_oplock_break = NO_BREAK_SENT;
1145 fsp->is_directory = True;
1146 fsp->directory_delete_on_close = False;
1148 string_set(&fsp->fsp_name,fname);
1150 if (delete_on_close) {
1151 NTSTATUS result = set_delete_on_close_internal(fsp, delete_on_close);
1153 if (NT_STATUS_V(result) != NT_STATUS_V(NT_STATUS_OK)) {
1158 conn->num_files_open++;
1163 /*******************************************************************
1164 Check if the share mode on a file allows it to be deleted or unlinked.
1165 Return True if sharing doesn't prevent the operation.
1166 ********************************************************************/
1168 BOOL check_file_sharing(connection_struct *conn,char *fname, BOOL rename_op)
1172 share_mode_entry *old_shares = 0;
1173 int num_share_modes;
1174 SMB_STRUCT_STAT sbuf;
1175 pid_t pid = sys_getpid();
1179 if (vfs_stat(conn,fname,&sbuf) == -1)
1183 inode = sbuf.st_ino;
1185 lock_share_entry(conn, dev, inode);
1186 num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
1189 * Check if the share modes will give us access.
1192 if(num_share_modes != 0)
1199 broke_oplock = False;
1200 for(i = 0; i < num_share_modes; i++)
1202 share_mode_entry *share_entry = &old_shares[i];
1205 * Break oplocks before checking share modes. See comment in
1206 * open_file_shared for details.
1207 * Check if someone has an oplock on this file. If so we must
1208 * break it before continuing.
1210 if(BATCH_OPLOCK_TYPE(share_entry->op_type))
1215 /* JRA. Try removing this code to see if the new oplock changes
1216 fix the problem. I'm dubious, but Andrew is recommending we
1221 * It appears that the NT redirector may have a bug, in that
1222 * it tries to do an SMBmv on a file that it has open with a
1223 * batch oplock, and then fails to respond to the oplock break
1224 * request. This only seems to occur when the client is doing an
1225 * SMBmv to the smbd it is using - thus we try and detect this
1226 * condition by checking if the file being moved is open and oplocked by
1227 * this smbd process, and then not sending the oplock break in this
1228 * special case. If the file was open with a deny mode that
1229 * prevents the move the SMBmv will fail anyway with a share
1230 * violation error. JRA.
1232 if(rename_op && (share_entry->pid == pid))
1235 DEBUG(0,("check_file_sharing: NT redirector workaround - rename attempted on \
1236 batch oplocked file %s, dev = %x, inode = %.0f\n", fname, (unsigned int)dev, (double)inode));
1239 * This next line is a test that allows the deny-mode
1240 * processing to be skipped. This seems to be needed as
1241 * NT insists on the rename succeeding (in Office 9x no less !).
1242 * This should be removed as soon as (a) MS fix the redirector
1243 * bug or (b) NT SMB support in Samba makes NT not issue the
1244 * call (as is my fervent hope). JRA.
1252 DEBUG(5,("check_file_sharing: breaking oplock (%x) on file %s, \
1253 dev = %x, inode = %.0f\n", share_entry->op_type, fname, (unsigned int)dev, (double)inode));
1255 /* Oplock break.... */
1256 unlock_share_entry(conn, dev, inode);
1257 if(request_oplock_break(share_entry) == False)
1259 DEBUG(0,("check_file_sharing: FAILED when breaking oplock (%x) on file %s, \
1260 dev = %x, inode = %.0f\n", old_shares[i].op_type, fname, (unsigned int)dev, (double)inode));
1262 SAFE_FREE(old_shares);
1265 lock_share_entry(conn, dev, inode);
1266 broke_oplock = True;
1272 * If this is a delete request and ALLOW_SHARE_DELETE is set then allow
1273 * this to proceed. This takes precedence over share modes.
1276 if(!rename_op && GET_ALLOW_SHARE_DELETE(share_entry->share_mode))
1280 * Someone else has a share lock on it, check to see
1284 if ((GET_DENY_MODE(share_entry->share_mode) != DENY_DOS) ||
1285 (share_entry->pid != pid))
1292 SAFE_FREE(old_shares);
1293 num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
1295 } while(broke_oplock);
1298 /* XXXX exactly what share mode combinations should be allowed for
1299 deleting/renaming? */
1301 * If we got here then either there were no share modes or
1302 * all share modes were DENY_DOS and the pid == getpid() or
1303 * delete access was requested and all share modes had the
1304 * ALLOW_SHARE_DELETE bit set (takes precedence over other
1312 unlock_share_entry(conn, dev, inode);
1313 SAFE_FREE(old_shares);