2 Unix SMB/Netbios implementation.
4 file opening and share modes
5 Copyright (C) Andrew Tridgell 1992-1998
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 int DEBUGLEVEL;
26 extern userdom_struct current_user_info;
27 extern uint16 global_oplock_port;
28 extern BOOL global_client_failed_oplock_break;
30 /****************************************************************************
31 fd support routines - attempt to do a dos_open.
32 ****************************************************************************/
34 static int fd_open(struct connection_struct *conn, char *fname,
35 int flags, mode_t mode)
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 GetTimeOfDay(&fsp->open_time);
186 fsp->vuid = current_user.vuid;
187 fsp->size = psbuf->st_size;
189 fsp->can_lock = True;
190 fsp->can_read = ((flags & O_WRONLY)==0);
191 fsp->can_write = ((flags & (O_WRONLY|O_RDWR))!=0);
193 fsp->print_file = False;
194 fsp->modified = False;
195 fsp->oplock_type = NO_OPLOCK;
196 fsp->sent_oplock_break = NO_BREAK_SENT;
197 fsp->is_directory = False;
198 fsp->stat_open = False;
199 fsp->directory_delete_on_close = False;
201 string_set(&fsp->fsp_name,fname);
202 fsp->wbmpx_ptr = NULL;
203 fsp->wcp = NULL; /* Write cache pointer. */
205 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
206 *current_user_info.smb_name ? current_user_info.smb_name : conn->user,fsp->fsp_name,
207 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
208 conn->num_files_open + 1));
211 * Take care of inherited ACLs on created files. JRA.
214 if ((flags & O_CREAT) && (conn->vfs_ops.fchmod_acl != NULL)) {
215 int saved_errno = errno; /* We might get ENOSYS in the next call.. */
216 if (conn->vfs_ops.fchmod_acl(fsp, fsp->fd, mode) == -1 && errno == ENOSYS)
217 errno = saved_errno; /* Ignore ENOSYS */
223 /****************************************************************************
225 Helper for open_file_shared.
226 Truncate a file after checking locking; close file if locked.
227 **************************************************************************/
229 static int truncate_unless_locked(struct connection_struct *conn, files_struct *fsp)
231 SMB_BIG_UINT mask = (SMB_BIG_UINT)-1;
233 if (is_locked(fsp,fsp->conn,mask,0,WRITE_LOCK,True)){
235 unix_ERR_class = ERRDOS;
236 unix_ERR_code = ERRlock;
239 return conn->vfs_ops.ftruncate(fsp,fsp->fd,0);
243 /*******************************************************************
244 return True if the filename is one of the special executable types
245 ********************************************************************/
246 static BOOL is_executable(const char *fname)
248 if ((fname = strrchr_m(fname,'.'))) {
249 if (strequal(fname,".com") ||
250 strequal(fname,".dll") ||
251 strequal(fname,".exe") ||
252 strequal(fname,".sym")) {
259 enum {AFAIL,AREAD,AWRITE,AALL};
261 /*******************************************************************
262 reproduce the share mode access table
263 this is horrendoously complex, and really can't be justified on any
264 rational grounds except that this is _exactly_ what NT does. See
265 the DENY1 and DENY2 tests in smbtorture for a comprehensive set of
267 ********************************************************************/
268 static int access_table(int new_deny,int old_deny,int old_mode,
269 BOOL same_pid, BOOL isexe)
271 if (new_deny == DENY_ALL || old_deny == DENY_ALL) return(AFAIL);
274 if (isexe && old_mode == DOS_OPEN_RDONLY &&
275 old_deny == DENY_DOS && new_deny == DENY_READ) {
278 if (!isexe && old_mode == DOS_OPEN_RDONLY &&
279 old_deny == DENY_DOS && new_deny == DENY_DOS) {
282 if (new_deny == DENY_FCB && old_deny == DENY_DOS) {
283 if (isexe) return AFAIL;
284 if (old_mode == DOS_OPEN_RDONLY) return AFAIL;
287 if (old_mode == DOS_OPEN_RDONLY && old_deny == DENY_DOS) {
288 if (new_deny == DENY_FCB || new_deny == DENY_READ) {
289 if (isexe) return AREAD;
293 if (old_deny == DENY_FCB) {
294 if (new_deny == DENY_DOS || new_deny == DENY_FCB) return AALL;
299 if (old_deny == DENY_DOS || new_deny == DENY_DOS ||
300 old_deny == DENY_FCB || new_deny == DENY_FCB) {
302 if (old_deny == DENY_FCB || new_deny == DENY_FCB) {
305 if (old_deny == DENY_DOS) {
306 if (new_deny == DENY_READ &&
307 (old_mode == DOS_OPEN_RDONLY ||
308 old_mode == DOS_OPEN_RDWR)) {
311 if (new_deny == DENY_WRITE &&
312 (old_mode == DOS_OPEN_WRONLY ||
313 old_mode == DOS_OPEN_RDWR)) {
318 if (old_deny == DENY_NONE) return AALL;
319 if (old_deny == DENY_READ) return AWRITE;
320 if (old_deny == DENY_WRITE) return AREAD;
322 /* it isn't a exe, dll, sym or com file */
323 if (old_deny == new_deny && same_pid)
326 if (old_deny == DENY_READ || new_deny == DENY_READ) return AFAIL;
327 if (old_mode == DOS_OPEN_RDONLY) return(AREAD);
335 if (old_deny==DENY_WRITE && old_mode==DOS_OPEN_RDONLY) return(AREAD);
336 if (old_deny==DENY_READ && old_mode==DOS_OPEN_RDONLY) return(AWRITE);
337 if (old_deny==DENY_NONE && old_mode==DOS_OPEN_RDONLY) return(AALL);
340 if (old_deny==DENY_WRITE && old_mode==DOS_OPEN_WRONLY) return(AREAD);
341 if (old_deny==DENY_READ && old_mode==DOS_OPEN_WRONLY) return(AWRITE);
342 if (old_deny==DENY_NONE && old_mode==DOS_OPEN_WRONLY) return(AALL);
345 if (old_deny==DENY_WRITE) return(AREAD);
346 if (old_deny==DENY_READ) return(AWRITE);
347 if (old_deny==DENY_NONE) return(AALL);
354 /****************************************************************************
355 check if we can open a file with a share mode
356 ****************************************************************************/
358 static int check_share_mode( share_mode_entry *share, int share_mode,
359 const char *fname, BOOL fcbopen, int *flags)
361 int deny_mode = GET_DENY_MODE(share_mode);
362 int old_open_mode = GET_OPEN_MODE(share->share_mode);
363 int old_deny_mode = GET_DENY_MODE(share->share_mode);
366 * Don't allow any opens once the delete on close flag has been
370 if (GET_DELETE_ON_CLOSE_FLAG(share->share_mode)) {
371 DEBUG(5,("check_share_mode: Failing open on file %s as delete on close flag is set.\n",
373 unix_ERR_class = ERRDOS;
374 unix_ERR_code = ERRnoaccess;
379 * If delete access was requested and the existing share mode doesn't have
380 * ALLOW_SHARE_DELETE then deny.
383 if (GET_DELETE_ACCESS_REQUESTED(share_mode) && !GET_ALLOW_SHARE_DELETE(share->share_mode)) {
384 DEBUG(5,("check_share_mode: Failing open on file %s as delete access requested and allow share delete not set.\n",
386 unix_ERR_class = ERRDOS;
387 unix_ERR_code = ERRbadshare;
393 * The inverse of the above.
394 * If delete access was granted and the new share mode doesn't have
395 * ALLOW_SHARE_DELETE then deny.
398 if (GET_DELETE_ACCESS_REQUESTED(share->share_mode) && !GET_ALLOW_SHARE_DELETE(share_mode)) {
399 DEBUG(5,("check_share_mode: Failing open on file %s as delete access granted and allow share delete not requested.\n",
401 unix_ERR_class = ERRDOS;
402 unix_ERR_code = ERRbadshare;
408 int access_allowed = access_table(deny_mode,old_deny_mode,old_open_mode,
409 (share->pid == sys_getpid()),is_executable(fname));
411 if ((access_allowed == AFAIL) ||
412 (!fcbopen && (access_allowed == AREAD && *flags == O_RDWR)) ||
413 (access_allowed == AREAD && *flags != O_RDONLY) ||
414 (access_allowed == AWRITE && *flags != O_WRONLY)) {
416 DEBUG(2,("Share violation on file (%d,%d,%d,%d,%s,fcbopen = %d, flags = %d) = %d\n",
417 deny_mode,old_deny_mode,old_open_mode,
418 (int)share->pid,fname, fcbopen, *flags, access_allowed));
420 unix_ERR_class = ERRDOS;
421 unix_ERR_code = ERRbadshare;
426 if (access_allowed == AREAD)
429 if (access_allowed == AWRITE)
437 /****************************************************************************
438 Deal with open deny mode and oplock break processing.
439 Invarient: Share mode must be locked on entry and exit.
440 Returns -1 on error, or number of share modes on success (may be zero).
441 ****************************************************************************/
443 static int open_mode_check(connection_struct *conn, const char *fname, SMB_DEV_T dev,
444 SMB_INO_T inode, int share_mode, int *p_flags, int *p_oplock_request,
445 BOOL *p_all_current_opens_are_level_II)
449 int oplock_contention_count = 0;
450 share_mode_entry *old_shares = 0;
451 BOOL fcbopen = False;
454 if(GET_OPEN_MODE(share_mode) == DOS_OPEN_FCB)
457 num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
459 if(num_share_modes == 0)
463 * Check if the share modes will give us access.
468 broke_oplock = False;
469 *p_all_current_opens_are_level_II = True;
471 for(i = 0; i < num_share_modes; i++) {
472 share_mode_entry *share_entry = &old_shares[i];
475 * By observation of NetBench, oplocks are broken *before* share
476 * modes are checked. This allows a file to be closed by the client
477 * if the share mode would deny access and the client has an oplock.
478 * Check if someone has an oplock on this file. If so we must break
479 * it before continuing.
482 if((*p_oplock_request && EXCLUSIVE_OPLOCK_TYPE(share_entry->op_type)) ||
483 (!*p_oplock_request && (share_entry->op_type != NO_OPLOCK))) {
487 DEBUG(5,("open_mode_check: oplock_request = %d, breaking oplock (%x) on file %s, \
488 dev = %x, inode = %.0f\n", *p_oplock_request, share_entry->op_type, fname, (unsigned int)dev, (double)inode));
490 /* Oplock break - unlock to request it. */
491 unlock_share_entry(conn, dev, inode);
493 opb_ret = request_oplock_break(share_entry, dev, inode);
496 lock_share_entry(conn, dev, inode);
498 if(opb_ret == False) {
499 free((char *)old_shares);
500 DEBUG(0,("open_mode_check: FAILED when breaking oplock (%x) on file %s, \
501 dev = %x, inode = %.0f\n", old_shares[i].op_type, fname, (unsigned int)dev, (double)inode));
503 unix_ERR_class = ERRDOS;
504 unix_ERR_code = ERRbadshare;
509 *p_all_current_opens_are_level_II = False;
512 } else if (!LEVEL_II_OPLOCK_TYPE(share_entry->op_type)) {
513 *p_all_current_opens_are_level_II = False;
516 /* someone else has a share lock on it, check to see
519 if(check_share_mode(share_entry, share_mode, fname, fcbopen, p_flags) == False) {
520 free((char *)old_shares);
528 free((char *)old_shares);
529 num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
530 oplock_contention_count++;
532 } while(broke_oplock);
535 free((char *)old_shares);
538 * Refuse to grant an oplock in case the contention limit is
539 * reached when going through the lock list multiple times.
542 if(oplock_contention_count >= lp_oplock_contention_limit(SNUM(conn))) {
543 *p_oplock_request = 0;
544 DEBUG(4,("open_mode_check: oplock contention = %d. Not granting oplock.\n",
545 oplock_contention_count ));
548 return num_share_modes;
551 /****************************************************************************
552 set a kernel flock on a file for NFS interoperability
553 this requires a patch to Linux
554 ****************************************************************************/
555 static void kernel_flock(files_struct *fsp, int deny_mode)
557 #if HAVE_KERNEL_SHARE_MODES
559 if (deny_mode == DENY_READ) kernel_mode = LOCK_MAND|LOCK_WRITE;
560 else if (deny_mode == DENY_WRITE) kernel_mode = LOCK_MAND|LOCK_READ;
561 else if (deny_mode == DENY_ALL) kernel_mode = LOCK_MAND;
562 if (kernel_mode) flock(fsp->fd, kernel_mode);
567 /****************************************************************************
568 Open a file with a share mode. On output from this open we are guarenteeing
570 ****************************************************************************/
571 files_struct *open_file_shared(connection_struct *conn,char *fname, SMB_STRUCT_STAT *psbuf,
572 int share_mode,int ofun, mode_t mode,int oplock_request, int *Access,int *action)
576 int deny_mode = GET_DENY_MODE(share_mode);
577 BOOL allow_share_delete = GET_ALLOW_SHARE_DELETE(share_mode);
578 BOOL delete_access_requested = GET_DELETE_ACCESS_REQUESTED(share_mode);
579 BOOL file_existed = VALID_STAT(*psbuf);
580 BOOL fcbopen = False;
583 int num_share_modes = 0;
584 BOOL all_current_opens_are_level_II = False;
585 BOOL fsp_open = False;
586 files_struct *fsp = NULL;
591 /* printers are handled completely differently. Most of the passed parameters are
593 *Access = DOS_OPEN_WRONLY;
594 *action = FILE_WAS_CREATED;
595 return print_fsp_open(conn);
598 fsp = file_new(conn);
602 DEBUG(10,("open_file_shared: fname = %s, share_mode = %x, ofun = %x, mode = %o, oplock request = %d\n",
603 fname, share_mode, ofun, (int)mode, oplock_request ));
605 if (!check_name(fname,conn)) {
610 /* ignore any oplock requests if oplocks are disabled */
611 if (!lp_oplocks(SNUM(conn)) || global_client_failed_oplock_break) {
615 /* this is for OS/2 EAs - try and say we don't support them */
616 if (strstr(fname,".+,;=[].")) {
617 unix_ERR_class = ERRDOS;
618 /* OS/2 Workplace shell fix may be main code stream in a later release. */
619 #if 1 /* OS2_WPS_FIX - Recent versions of OS/2 need this. */
620 unix_ERR_code = ERRcannotopen;
621 #else /* OS2_WPS_FIX */
622 unix_ERR_code = ERROR_EAS_NOT_SUPPORTED;
623 #endif /* OS2_WPS_FIX */
625 DEBUG(5,("open_file_shared: OS/2 EA's are not supported.\n"));
630 if ((GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_FAIL) && file_existed) {
631 DEBUG(5,("open_file_shared: create new requested for file %s and file already exists.\n",
638 if (GET_FILE_CREATE_DISPOSITION(ofun) == FILE_CREATE_IF_NOT_EXIST)
641 if (GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_TRUNCATE)
644 if (GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_FAIL)
647 /* note that we ignore the append flag as
648 append does not mean the same thing under dos and unix */
650 switch (GET_OPEN_MODE(share_mode)) {
651 case DOS_OPEN_WRONLY:
667 if (GET_FILE_SYNC_OPENMODE(share_mode)) {
672 if (flags != O_RDONLY && file_existed &&
673 (!CAN_WRITE(conn) || IS_DOS_READONLY(dos_mode(conn,fname,psbuf)))) {
675 DEBUG(5,("open_file_shared: read/write access requested for file %s on read only %s\n",
676 fname, !CAN_WRITE(conn) ? "share" : "file" ));
684 if (deny_mode > DENY_NONE && deny_mode!=DENY_FCB) {
685 DEBUG(2,("Invalid deny mode %d on file %s\n",deny_mode,fname));
694 inode = psbuf->st_ino;
696 lock_share_entry(conn, dev, inode);
698 num_share_modes = open_mode_check(conn, fname, dev, inode, share_mode,
699 &flags, &oplock_request, &all_current_opens_are_level_II);
700 if(num_share_modes == -1) {
703 * This next line is a subtlety we need for MS-Access. If a file open will
704 * fail due to share permissions and also for security (access)
705 * reasons, we need to return the access failed error, not the
706 * share error. This means we must attempt to open the file anyway
707 * in order to get the UNIX access error - even if we're going to
708 * fail the open for share reasons. This is bad, as we're burning
709 * another fd if there are existing locks but there's nothing else
710 * we can do. We also ensure we're not going to create or tuncate
711 * the file as we only want an access decision at this stage. JRA.
713 fsp_open = open_file(fsp,conn,fname,psbuf,flags|(flags2&~(O_TRUNC|O_CREAT)),mode);
715 DEBUG(4,("open_file_shared : share_mode deny - calling open_file with \
716 flags=0x%X flags2=0x%X mode=0%o returned %d\n",
717 flags,(flags2&~(O_TRUNC|O_CREAT)),(int)mode,(int)fsp_open ));
719 unlock_share_entry(conn, dev, inode);
727 * We exit this block with the share entry *locked*.....
731 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o\n",
732 flags,flags2,(int)mode));
735 * open_file strips any O_TRUNC flags itself.
738 fsp_open = open_file(fsp,conn,fname,psbuf,flags|flags2,mode);
740 if (!fsp_open && (flags == O_RDWR) && (errno != ENOENT) && fcbopen) {
741 if((fsp_open = open_file(fsp,conn,fname,psbuf,O_RDONLY,mode)) == True)
747 unlock_share_entry(conn, dev, inode);
753 * Deal with the race condition where two smbd's detect the file doesn't
754 * exist and do the create at the same time. One of them will win and
755 * set a share mode, the other (ie. this one) should check if the
756 * requested share mode for this create is allowed.
761 lock_share_entry_fsp(fsp);
763 num_share_modes = open_mode_check(conn, fname, dev, inode, share_mode,
764 &flags, &oplock_request, &all_current_opens_are_level_II);
766 if(num_share_modes == -1) {
767 unlock_share_entry_fsp(fsp);
774 * We exit this block with the share entry *locked*.....
778 /* note that we ignore failure for the following. It is
779 basically a hack for NFS, and NFS will never set one of
780 these only read them. Nobody but Samba can ever set a deny
781 mode and we have already checked our more authoritative
782 locking database for permission to set this deny mode. If
783 the kernel refuses the operations then the kernel is wrong */
784 kernel_flock(fsp, deny_mode);
787 * At this point onwards, we can guarentee that the share entry
788 * is locked, whether we created the file or not, and that the
789 * deny mode is compatible with all current opens.
793 * If requested, truncate the file.
796 if (flags2&O_TRUNC) {
798 * We are modifing the file after open - update the stat struct..
800 if ((truncate_unless_locked(conn,fsp) == -1) || (vfs_fstat(fsp,fsp->fd,psbuf)==-1)) {
801 unlock_share_entry_fsp(fsp);
810 open_mode = DOS_OPEN_RDONLY;
813 open_mode = DOS_OPEN_RDWR;
816 open_mode = DOS_OPEN_WRONLY;
820 fsp->share_mode = SET_DENY_MODE(deny_mode) |
821 SET_OPEN_MODE(open_mode) |
822 SET_ALLOW_SHARE_DELETE(allow_share_delete) |
823 SET_DELETE_ACCESS_REQUESTED(delete_access_requested);
825 DEBUG(10,("open_file_shared : share_mode = %x\n", fsp->share_mode ));
828 (*Access) = open_mode;
831 if (file_existed && !(flags2 & O_TRUNC))
832 *action = FILE_WAS_OPENED;
834 *action = FILE_WAS_CREATED;
835 if (file_existed && (flags2 & O_TRUNC))
836 *action = FILE_WAS_OVERWRITTEN;
840 * Setup the oplock info in both the shared memory and
844 if(oplock_request && (num_share_modes == 0) &&
845 !IS_VETO_OPLOCK_PATH(conn,fname) && set_file_oplock(fsp, oplock_request) ) {
846 port = global_oplock_port;
847 } else if (oplock_request && all_current_opens_are_level_II) {
848 port = global_oplock_port;
849 oplock_request = LEVEL_II_OPLOCK;
850 set_file_oplock(fsp, oplock_request);
856 set_share_mode(fsp, port, oplock_request);
858 unlock_share_entry_fsp(fsp);
860 conn->num_files_open++;
865 /****************************************************************************
866 Open a file for permissions read only. Return a pseudo file entry
867 with the 'stat_open' flag set
868 ****************************************************************************/
870 files_struct *open_file_stat(connection_struct *conn, char *fname,
871 SMB_STRUCT_STAT *psbuf, int smb_ofun, int *action)
873 extern struct current_user current_user;
874 files_struct *fsp = NULL;
876 if (!VALID_STAT(*psbuf)) {
877 DEBUG(0,("open_file_stat: unable to stat name = %s. Error was %s\n", fname, strerror(errno) ));
881 if(S_ISDIR(psbuf->st_mode)) {
882 DEBUG(0,("open_file_stat: %s is a directory !\n", fname ));
886 fsp = file_new(conn);
890 *action = FILE_WAS_OPENED;
892 DEBUG(5,("open_file_stat: opening file %s as a stat entry\n", fname));
895 * Setup the files_struct for it.
899 fsp->mode = psbuf->st_mode;
900 fsp->inode = psbuf->st_ino;
901 fsp->dev = psbuf->st_dev;
902 GetTimeOfDay(&fsp->open_time);
903 fsp->size = psbuf->st_size;
904 fsp->vuid = current_user.vuid;
906 fsp->can_lock = False;
907 fsp->can_read = False;
908 fsp->can_write = False;
910 fsp->print_file = False;
911 fsp->modified = False;
912 fsp->oplock_type = NO_OPLOCK;
913 fsp->sent_oplock_break = NO_BREAK_SENT;
914 fsp->is_directory = False;
915 fsp->stat_open = True;
916 fsp->directory_delete_on_close = False;
918 string_set(&fsp->fsp_name,fname);
919 fsp->wbmpx_ptr = NULL;
920 fsp->wcp = NULL; /* Write cache pointer. */
922 conn->num_files_open++;
927 /****************************************************************************
928 Open a file for for write to ensure that we can fchmod it.
929 ****************************************************************************/
931 files_struct *open_file_fchmod(connection_struct *conn, char *fname, SMB_STRUCT_STAT *psbuf)
933 files_struct *fsp = NULL;
936 if (!VALID_STAT(*psbuf))
939 fsp = file_new(conn);
943 fsp_open = open_file(fsp,conn,fname,psbuf,O_WRONLY,0);
946 * This is not a user visible file open.
947 * Don't set a share mode and don't increment
948 * the conn->num_files_open.
959 /****************************************************************************
960 Close the fchmod file fd - ensure no locks are lost.
961 ****************************************************************************/
963 int close_file_fchmod(files_struct *fsp)
965 int ret = fd_close(fsp->conn, fsp);
970 /****************************************************************************
971 Open a directory from an NT SMB call.
972 ****************************************************************************/
974 files_struct *open_directory(connection_struct *conn, char *fname,
975 SMB_STRUCT_STAT *psbuf, int smb_ofun, mode_t unixmode, int *action)
977 extern struct current_user current_user;
978 BOOL got_stat = False;
979 files_struct *fsp = file_new(conn);
984 fsp->conn = conn; /* The vfs_fXXX() macros need this. */
986 if (VALID_STAT(*psbuf))
989 if (got_stat && (GET_FILE_OPEN_DISPOSITION(smb_ofun) == FILE_EXISTS_FAIL)) {
991 errno = EEXIST; /* Setup so correct error is returned to client. */
995 if (GET_FILE_CREATE_DISPOSITION(smb_ofun) == FILE_CREATE_IF_NOT_EXIST) {
999 if(!S_ISDIR(psbuf->st_mode)) {
1000 DEBUG(0,("open_directory: %s is not a directory !\n", fname ));
1005 *action = FILE_WAS_OPENED;
1010 * Try and create the directory.
1013 if(!CAN_WRITE(conn)) {
1014 DEBUG(2,("open_directory: failing create on read-only share\n"));
1020 if(vfs_mkdir(conn,fname, unix_mode(conn,aDIR, fname)) < 0) {
1021 DEBUG(0,("open_directory: unable to create %s. Error was %s\n",
1022 fname, strerror(errno) ));
1027 if(vfs_stat(conn,fname, psbuf) != 0) {
1032 *action = FILE_WAS_CREATED;
1038 * Don't create - just check that it *was* a directory.
1042 DEBUG(0,("open_directory: unable to stat name = %s. Error was %s\n",
1043 fname, strerror(errno) ));
1048 if(!S_ISDIR(psbuf->st_mode)) {
1049 DEBUG(0,("open_directory: %s is not a directory !\n", fname ));
1054 *action = FILE_WAS_OPENED;
1057 DEBUG(5,("open_directory: opening directory %s\n", fname));
1060 * Setup the files_struct for it.
1064 fsp->mode = psbuf->st_mode;
1065 fsp->inode = psbuf->st_ino;
1066 fsp->dev = psbuf->st_dev;
1067 GetTimeOfDay(&fsp->open_time);
1068 fsp->size = psbuf->st_size;
1069 fsp->vuid = current_user.vuid;
1071 fsp->can_lock = True;
1072 fsp->can_read = False;
1073 fsp->can_write = False;
1074 fsp->share_mode = 0;
1075 fsp->print_file = False;
1076 fsp->modified = False;
1077 fsp->oplock_type = NO_OPLOCK;
1078 fsp->sent_oplock_break = NO_BREAK_SENT;
1079 fsp->is_directory = True;
1080 fsp->directory_delete_on_close = False;
1082 string_set(&fsp->fsp_name,fname);
1083 fsp->wbmpx_ptr = NULL;
1085 conn->num_files_open++;
1090 /*******************************************************************
1091 Check if the share mode on a file allows it to be deleted or unlinked.
1092 Return True if sharing doesn't prevent the operation.
1093 ********************************************************************/
1095 BOOL check_file_sharing(connection_struct *conn,char *fname, BOOL rename_op)
1099 share_mode_entry *old_shares = 0;
1100 int num_share_modes;
1101 SMB_STRUCT_STAT sbuf;
1102 pid_t pid = sys_getpid();
1106 if (vfs_stat(conn,fname,&sbuf) == -1)
1110 inode = sbuf.st_ino;
1112 lock_share_entry(conn, dev, inode);
1113 num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
1116 * Check if the share modes will give us access.
1119 if(num_share_modes != 0)
1126 broke_oplock = False;
1127 for(i = 0; i < num_share_modes; i++)
1129 share_mode_entry *share_entry = &old_shares[i];
1132 * Break oplocks before checking share modes. See comment in
1133 * open_file_shared for details.
1134 * Check if someone has an oplock on this file. If so we must
1135 * break it before continuing.
1137 if(BATCH_OPLOCK_TYPE(share_entry->op_type))
1142 /* JRA. Try removing this code to see if the new oplock changes
1143 fix the problem. I'm dubious, but Andrew is recommending we
1148 * It appears that the NT redirector may have a bug, in that
1149 * it tries to do an SMBmv on a file that it has open with a
1150 * batch oplock, and then fails to respond to the oplock break
1151 * request. This only seems to occur when the client is doing an
1152 * SMBmv to the smbd it is using - thus we try and detect this
1153 * condition by checking if the file being moved is open and oplocked by
1154 * this smbd process, and then not sending the oplock break in this
1155 * special case. If the file was open with a deny mode that
1156 * prevents the move the SMBmv will fail anyway with a share
1157 * violation error. JRA.
1159 if(rename_op && (share_entry->pid == pid))
1162 DEBUG(0,("check_file_sharing: NT redirector workaround - rename attempted on \
1163 batch oplocked file %s, dev = %x, inode = %.0f\n", fname, (unsigned int)dev, (double)inode));
1166 * This next line is a test that allows the deny-mode
1167 * processing to be skipped. This seems to be needed as
1168 * NT insists on the rename succeeding (in Office 9x no less !).
1169 * This should be removed as soon as (a) MS fix the redirector
1170 * bug or (b) NT SMB support in Samba makes NT not issue the
1171 * call (as is my fervent hope). JRA.
1179 DEBUG(5,("check_file_sharing: breaking oplock (%x) on file %s, \
1180 dev = %x, inode = %.0f\n", share_entry->op_type, fname, (unsigned int)dev, (double)inode));
1182 /* Oplock break.... */
1183 unlock_share_entry(conn, dev, inode);
1184 if(request_oplock_break(share_entry, dev, inode) == False)
1186 free((char *)old_shares);
1188 DEBUG(0,("check_file_sharing: FAILED when breaking oplock (%x) on file %s, \
1189 dev = %x, inode = %.0f\n", old_shares[i].op_type, fname, (unsigned int)dev, (double)inode));
1193 lock_share_entry(conn, dev, inode);
1194 broke_oplock = True;
1200 * If this is a delete request and ALLOW_SHARE_DELETE is set then allow
1201 * this to proceed. This takes precedence over share modes.
1204 if(!rename_op && GET_ALLOW_SHARE_DELETE(share_entry->share_mode))
1208 * Someone else has a share lock on it, check to see
1212 if ((GET_DENY_MODE(share_entry->share_mode) != DENY_DOS) ||
1213 (share_entry->pid != pid))
1220 free((char *)old_shares);
1221 num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
1223 } while(broke_oplock);
1226 /* XXXX exactly what share mode combinations should be allowed for
1227 deleting/renaming? */
1229 * If we got here then either there were no share modes or
1230 * all share modes were DENY_DOS and the pid == getpid() or
1231 * delete access was requested and all share modes had the
1232 * ALLOW_SHARE_DELETE bit set (takes precedence over other
1240 unlock_share_entry(conn, dev, inode);
1241 if(old_shares != NULL)
1242 free((char *)old_shares);