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)
42 fd = conn->vfs_ops.open(conn,dos_to_unix(fname,False),flags,mode);
44 /* Fix for files ending in '.' */
45 if((fd == -1) && (errno == ENOENT) &&
46 (strchr(fname,'.')==NULL)) {
48 fd = conn->vfs_ops.open(conn,dos_to_unix(fname,False),flags,mode);
51 DEBUG(10,("fd_open: name %s, mode = %d, fd = %d. %s\n", fname, (int)mode, fd,
52 (fd == -1) ? strerror(errno) : "" ));
57 /****************************************************************************
58 Close the file associated with a fsp.
59 ****************************************************************************/
61 int fd_close(struct connection_struct *conn, files_struct *fsp)
63 return fd_close_posix(conn, fsp);
67 /****************************************************************************
68 Check a filename for the pipe string.
69 ****************************************************************************/
71 static void check_for_pipe(char *fname)
73 /* special case of pipe opens */
75 StrnCpy(s,fname,sizeof(s)-1);
77 if (strstr(s,"pipe/")) {
78 DEBUG(3,("Rejecting named pipe open for %s\n",fname));
79 unix_ERR_class = ERRSRV;
80 unix_ERR_code = ERRaccess;
84 /****************************************************************************
86 ****************************************************************************/
88 static BOOL open_file(files_struct *fsp,connection_struct *conn,
89 char *fname1,SMB_STRUCT_STAT *psbuf,int flags,mode_t mode)
91 extern struct current_user current_user;
93 int accmode = (flags & O_ACCMODE);
96 fsp->oplock_type = NO_OPLOCK;
99 pstrcpy(fname,fname1);
101 /* Check permissions */
104 * This code was changed after seeing a client open request
105 * containing the open mode of (DENY_WRITE/read-only) with
106 * the 'create if not exist' bit set. The previous code
107 * would fail to open the file read only on a read-only share
108 * as it was checking the flags parameter directly against O_RDONLY,
109 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
113 if (!CAN_WRITE(conn)) {
114 /* It's a read-only share - fail if we wanted to write. */
115 if(accmode != O_RDONLY) {
116 DEBUG(3,("Permission denied opening %s\n",fname));
117 check_for_pipe(fname);
119 } else if(flags & O_CREAT) {
120 /* We don't want to write - but we must make sure that O_CREAT
121 doesn't create the file if we have write access into the
128 /* actually do the open */
129 fsp->fd = fd_open(conn, fname, flags, mode);
132 DEBUG(3,("Error opening file %s (%s) (flags=%d)\n",
133 fname,strerror(errno),flags));
134 check_for_pipe(fname);
138 if (!VALID_STAT(*psbuf)) {
139 if (vfs_fstat(fsp,fsp->fd,psbuf) == -1) {
140 DEBUG(0,("Error doing fstat on open file %s (%s)\n", fname,strerror(errno) ));
147 * POSIX allows read-only opens of directories. We don't
148 * want to do this (we use a different code path for this)
149 * so catch a directory open and return an EISDIR. JRA.
152 if(S_ISDIR(psbuf->st_mode)) {
158 fsp->mode = psbuf->st_mode;
159 fsp->inode = psbuf->st_ino;
160 fsp->dev = psbuf->st_dev;
161 GetTimeOfDay(&fsp->open_time);
162 fsp->vuid = current_user.vuid;
163 fsp->size = psbuf->st_size;
165 fsp->can_lock = True;
166 fsp->can_read = ((flags & O_WRONLY)==0);
167 fsp->can_write = ((flags & (O_WRONLY|O_RDWR))!=0);
169 fsp->print_file = False;
170 fsp->modified = False;
171 fsp->oplock_type = NO_OPLOCK;
172 fsp->sent_oplock_break = NO_BREAK_SENT;
173 fsp->is_directory = False;
174 fsp->stat_open = False;
175 fsp->directory_delete_on_close = False;
178 * Note that the file name here is the *untranslated* name
179 * ie. it is still in the DOS codepage sent from the client.
180 * All use of this filename will pass though the sys_xxxx
181 * functions which will do the dos_to_unix translation before
182 * mapping into a UNIX filename. JRA.
184 string_set(&fsp->fsp_name,fname);
185 fsp->wbmpx_ptr = NULL;
186 fsp->wcp = NULL; /* Write cache pointer. */
188 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
189 *current_user_info.smb_name ? current_user_info.smb_name : conn->user,fsp->fsp_name,
190 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
191 conn->num_files_open + 1));
194 * Take care of inherited ACLs on created files. JRA.
197 if ((flags & O_CREAT) && (conn->vfs_ops.fchmod_acl != NULL)) {
198 int saved_errno = errno; /* We might get ENOSYS in the next call.. */
199 if (conn->vfs_ops.fchmod_acl(fsp, fsp->fd, mode) == -1 && errno == ENOSYS)
200 errno = saved_errno; /* Ignore ENOSYS */
206 /****************************************************************************
208 Helper for open_file_shared.
209 Truncate a file after checking locking; close file if locked.
210 **************************************************************************/
212 static int truncate_unless_locked(struct connection_struct *conn, files_struct *fsp)
214 SMB_BIG_UINT mask = (SMB_BIG_UINT)-1;
219 if (is_locked(fsp,fsp->conn,mask,0,WRITE_LOCK)){
221 unix_ERR_class = ERRDOS;
222 unix_ERR_code = ERRlock;
225 return conn->vfs_ops.ftruncate(fsp,fsp->fd,0);
229 /*******************************************************************
230 return True if the filename is one of the special executable types
231 ********************************************************************/
232 static BOOL is_executable(const char *fname)
234 if ((fname = strrchr(fname,'.'))) {
235 if (strequal(fname,".com") ||
236 strequal(fname,".dll") ||
237 strequal(fname,".exe") ||
238 strequal(fname,".sym")) {
245 enum {AFAIL,AREAD,AWRITE,AALL};
247 /*******************************************************************
248 reproduce the share mode access table
249 this is horrendoously complex, and really can't be justified on any
250 rational grounds except that this is _exactly_ what NT does. See
251 the DENY1 and DENY2 tests in smbtorture for a comprehensive set of
253 ********************************************************************/
254 static int access_table(int new_deny,int old_deny,int old_mode,
255 BOOL same_pid, BOOL isexe)
257 if (new_deny == DENY_ALL || old_deny == DENY_ALL) return(AFAIL);
260 if (isexe && old_mode == DOS_OPEN_RDONLY &&
261 old_deny == DENY_DOS && new_deny == DENY_READ) {
264 if (!isexe && old_mode == DOS_OPEN_RDONLY &&
265 old_deny == DENY_DOS && new_deny == DENY_DOS) {
268 if (new_deny == DENY_FCB && old_deny == DENY_DOS) {
269 if (isexe) return AFAIL;
270 if (old_mode == DOS_OPEN_RDONLY) return AFAIL;
273 if (old_mode == DOS_OPEN_RDONLY && old_deny == DENY_DOS) {
274 if (new_deny == DENY_FCB || new_deny == DENY_READ) {
275 if (isexe) return AREAD;
279 if (old_deny == DENY_FCB) {
280 if (new_deny == DENY_DOS || new_deny == DENY_FCB) return AALL;
285 if (old_deny == DENY_DOS || new_deny == DENY_DOS ||
286 old_deny == DENY_FCB || new_deny == DENY_FCB) {
288 if (old_deny == DENY_FCB || new_deny == DENY_FCB) {
291 if (old_deny == DENY_DOS) {
292 if (new_deny == DENY_READ &&
293 (old_mode == DOS_OPEN_RDONLY ||
294 old_mode == DOS_OPEN_RDWR)) {
297 if (new_deny == DENY_WRITE &&
298 (old_mode == DOS_OPEN_WRONLY ||
299 old_mode == DOS_OPEN_RDWR)) {
304 if (old_deny == DENY_NONE) return AALL;
305 if (old_deny == DENY_READ) return AWRITE;
306 if (old_deny == DENY_WRITE) return AREAD;
308 /* it isn't a exe, dll, sym or com file */
309 if (old_deny == new_deny && same_pid)
312 if (old_deny == DENY_READ || new_deny == DENY_READ) return AFAIL;
313 if (old_mode == DOS_OPEN_RDONLY) return(AREAD);
321 if (old_deny==DENY_WRITE && old_mode==DOS_OPEN_RDONLY) return(AREAD);
322 if (old_deny==DENY_READ && old_mode==DOS_OPEN_RDONLY) return(AWRITE);
323 if (old_deny==DENY_NONE && old_mode==DOS_OPEN_RDONLY) return(AALL);
326 if (old_deny==DENY_WRITE && old_mode==DOS_OPEN_WRONLY) return(AREAD);
327 if (old_deny==DENY_READ && old_mode==DOS_OPEN_WRONLY) return(AWRITE);
328 if (old_deny==DENY_NONE && old_mode==DOS_OPEN_WRONLY) return(AALL);
331 if (old_deny==DENY_WRITE) return(AREAD);
332 if (old_deny==DENY_READ) return(AWRITE);
333 if (old_deny==DENY_NONE) return(AALL);
340 /****************************************************************************
341 check if we can open a file with a share mode
342 ****************************************************************************/
344 static int check_share_mode( share_mode_entry *share, int deny_mode,
345 const char *fname, BOOL fcbopen, int *flags)
347 int old_open_mode = GET_OPEN_MODE(share->share_mode);
348 int old_deny_mode = GET_DENY_MODE(share->share_mode);
351 * Don't allow any open once the delete on close flag has been
355 if(GET_DELETE_ON_CLOSE_FLAG(share->share_mode)) {
356 DEBUG(5,("check_share_mode: Failing open on file %s as delete on close flag is set.\n",
358 unix_ERR_class = ERRDOS;
359 unix_ERR_code = ERRnoaccess;
364 int access_allowed = access_table(deny_mode,old_deny_mode,old_open_mode,
365 (share->pid == sys_getpid()),is_executable(fname));
367 if ((access_allowed == AFAIL) ||
368 (!fcbopen && (access_allowed == AREAD && *flags == O_RDWR)) ||
369 (access_allowed == AREAD && *flags != O_RDONLY) ||
370 (access_allowed == AWRITE && *flags != O_WRONLY)) {
372 DEBUG(2,("Share violation on file (%d,%d,%d,%d,%s,fcbopen = %d, flags = %d) = %d\n",
373 deny_mode,old_deny_mode,old_open_mode,
374 (int)share->pid,fname, fcbopen, *flags, access_allowed));
376 unix_ERR_class = ERRDOS;
377 unix_ERR_code = ERRbadshare;
382 if (access_allowed == AREAD)
385 if (access_allowed == AWRITE)
393 /****************************************************************************
394 Deal with open deny mode and oplock break processing.
395 Invarient: Share mode must be locked on entry and exit.
396 Returns -1 on error, or number of share modes on success (may be zero).
397 ****************************************************************************/
399 static int open_mode_check(connection_struct *conn, const char *fname, SMB_DEV_T dev,
400 SMB_INO_T inode, int share_mode, int *p_flags, int *p_oplock_request,
401 BOOL *p_all_current_opens_are_level_II)
405 int oplock_contention_count = 0;
406 share_mode_entry *old_shares = 0;
407 BOOL fcbopen = False;
408 int deny_mode = GET_DENY_MODE(share_mode);
411 if(GET_OPEN_MODE(share_mode) == DOS_OPEN_FCB)
414 num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
416 if(num_share_modes == 0)
420 * Check if the share modes will give us access.
425 broke_oplock = False;
426 *p_all_current_opens_are_level_II = True;
428 for(i = 0; i < num_share_modes; i++) {
429 share_mode_entry *share_entry = &old_shares[i];
432 * By observation of NetBench, oplocks are broken *before* share
433 * modes are checked. This allows a file to be closed by the client
434 * if the share mode would deny access and the client has an oplock.
435 * Check if someone has an oplock on this file. If so we must break
436 * it before continuing.
439 if((*p_oplock_request && EXCLUSIVE_OPLOCK_TYPE(share_entry->op_type)) ||
440 (!*p_oplock_request && (share_entry->op_type != NO_OPLOCK))) {
444 DEBUG(5,("open_mode_check: breaking oplock (%x) on file %s, \
445 dev = %x, inode = %.0f\n", share_entry->op_type, fname, (unsigned int)dev, (double)inode));
447 /* Oplock break - unlock to request it. */
448 unlock_share_entry(conn, dev, inode);
450 opb_ret = request_oplock_break(share_entry, dev, inode);
453 lock_share_entry(conn, dev, inode);
455 if(opb_ret == False) {
456 free((char *)old_shares);
457 DEBUG(0,("open_mode_check: FAILED when breaking oplock (%x) on file %s, \
458 dev = %x, inode = %.0f\n", old_shares[i].op_type, fname, (unsigned int)dev, (double)inode));
460 unix_ERR_class = ERRDOS;
461 unix_ERR_code = ERRbadshare;
466 *p_all_current_opens_are_level_II = False;
469 } else if (!LEVEL_II_OPLOCK_TYPE(share_entry->op_type)) {
470 *p_all_current_opens_are_level_II = False;
473 /* someone else has a share lock on it, check to see
476 if(check_share_mode(share_entry, deny_mode, fname, fcbopen, p_flags) == False) {
477 free((char *)old_shares);
485 free((char *)old_shares);
486 num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
487 oplock_contention_count++;
489 } while(broke_oplock);
492 free((char *)old_shares);
495 * Refuse to grant an oplock in case the contention limit is
496 * reached when going through the lock list multiple times.
499 if(oplock_contention_count >= lp_oplock_contention_limit(SNUM(conn))) {
500 *p_oplock_request = 0;
501 DEBUG(4,("open_mode_check: oplock contention = %d. Not granting oplock.\n",
502 oplock_contention_count ));
505 return num_share_modes;
508 /****************************************************************************
509 set a kernel flock on a file for NFS interoperability
510 this requires a patch to Linux
511 ****************************************************************************/
512 static void kernel_flock(files_struct *fsp, int deny_mode)
514 #if HAVE_KERNEL_SHARE_MODES
516 if (deny_mode == DENY_READ) kernel_mode = LOCK_MAND|LOCK_WRITE;
517 else if (deny_mode == DENY_WRITE) kernel_mode = LOCK_MAND|LOCK_READ;
518 else if (deny_mode == DENY_ALL) kernel_mode = LOCK_MAND;
519 if (kernel_mode) flock(fsp->fd, kernel_mode);
524 /****************************************************************************
525 Open a file with a share mode. On output from this open we are guarenteeing
527 ****************************************************************************/
528 files_struct *open_file_shared(connection_struct *conn,char *fname, SMB_STRUCT_STAT *psbuf,
529 int share_mode,int ofun, mode_t mode,int oplock_request, int *Access,int *action)
533 int deny_mode = GET_DENY_MODE(share_mode);
534 BOOL allow_share_delete = GET_ALLOW_SHARE_DELETE(share_mode);
535 BOOL file_existed = VALID_STAT(*psbuf);
536 BOOL fcbopen = False;
539 int num_share_modes = 0;
540 BOOL all_current_opens_are_level_II = False;
541 BOOL fsp_open = False;
542 files_struct *fsp = NULL;
547 /* printers are handled completely differently. Most of the passed parameters are
549 *Access = DOS_OPEN_WRONLY;
550 *action = FILE_WAS_CREATED;
551 return print_fsp_open(conn, fname);
559 fsp->conn = conn; /* The vfs_fXXX() macros need this. */
561 DEBUG(10,("open_file_shared: fname = %s, share_mode = %x, ofun = %x, mode = %o, oplock request = %d\n",
562 fname, share_mode, ofun, (int)mode, oplock_request ));
564 if (!check_name(fname,conn)) {
569 /* ignore any oplock requests if oplocks are disabled */
570 if (!lp_oplocks(SNUM(conn)) || global_client_failed_oplock_break) {
574 /* this is for OS/2 EAs - try and say we don't support them */
575 if (strstr(fname,".+,;=[].")) {
576 unix_ERR_class = ERRDOS;
577 /* OS/2 Workplace shell fix may be main code stream in a later release. */
578 #if 1 /* OS2_WPS_FIX - Recent versions of OS/2 need this. */
579 unix_ERR_code = ERRcannotopen;
580 #else /* OS2_WPS_FIX */
581 unix_ERR_code = ERROR_EAS_NOT_SUPPORTED;
582 #endif /* OS2_WPS_FIX */
584 DEBUG(5,("open_file_shared: OS/2 EA's are not supported.\n"));
589 if ((GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_FAIL) && file_existed) {
590 DEBUG(5,("open_file_shared: create new requested for file %s and file already exists.\n",
597 if (GET_FILE_CREATE_DISPOSITION(ofun) == FILE_CREATE_IF_NOT_EXIST)
600 if (GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_TRUNCATE)
603 if (GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_FAIL)
606 /* note that we ignore the append flag as
607 append does not mean the same thing under dos and unix */
609 switch (GET_OPEN_MODE(share_mode)) {
610 case DOS_OPEN_WRONLY:
626 if (GET_FILE_SYNC_OPENMODE(share_mode)) {
631 if (flags != O_RDONLY && file_existed &&
632 (!CAN_WRITE(conn) || IS_DOS_READONLY(dos_mode(conn,fname,psbuf)))) {
634 DEBUG(5,("open_file_shared: read/write access requested for file %s on read only %s\n",
635 fname, !CAN_WRITE(conn) ? "share" : "file" ));
643 if (deny_mode > DENY_NONE && deny_mode!=DENY_FCB) {
644 DEBUG(2,("Invalid deny mode %d on file %s\n",deny_mode,fname));
653 inode = psbuf->st_ino;
655 lock_share_entry(conn, dev, inode);
657 num_share_modes = open_mode_check(conn, fname, dev, inode, share_mode,
658 &flags, &oplock_request, &all_current_opens_are_level_II);
659 if(num_share_modes == -1) {
662 * This next line is a subtlety we need for MS-Access. If a file open will
663 * fail due to share permissions and also for security (access)
664 * reasons, we need to return the access failed error, not the
665 * share error. This means we must attempt to open the file anyway
666 * in order to get the UNIX access error - even if we're going to
667 * fail the open for share reasons. This is bad, as we're burning
668 * another fd if there are existing locks but there's nothing else
669 * we can do. We also ensure we're not going to create or tuncate
670 * the file as we only want an access decision at this stage. JRA.
672 open_file(fsp,conn,fname,psbuf,flags|(flags2&~(O_TRUNC|O_CREAT)),mode);
674 unlock_share_entry(conn, dev, inode);
680 * We exit this block with the share entry *locked*.....
684 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o\n",
685 flags,flags2,(int)mode));
687 fsp_open = open_file(fsp,conn,fname,psbuf,flags|(flags2&~(O_TRUNC)),mode);
689 if (!fsp_open && (flags == O_RDWR) && (errno != ENOENT) && fcbopen) {
690 if((fsp_open = open_file(fsp,conn,fname,psbuf,O_RDONLY,mode)) == True)
696 unlock_share_entry(conn, dev, inode);
702 * Deal with the race condition where two smbd's detect the file doesn't
703 * exist and do the create at the same time. One of them will win and
704 * set a share mode, the other (ie. this one) should check if the
705 * requested share mode for this create is allowed.
710 lock_share_entry_fsp(fsp);
712 num_share_modes = open_mode_check(conn, fname, dev, inode, share_mode,
713 &flags, &oplock_request, &all_current_opens_are_level_II);
715 if(num_share_modes == -1) {
716 unlock_share_entry_fsp(fsp);
723 * We exit this block with the share entry *locked*.....
727 /* note that we ignore failure for the following. It is
728 basically a hack for NFS, and NFS will never set one of
729 these only read them. Nobody but Samba can ever set a deny
730 mode and we have already checked our more authoritative
731 locking database for permission to set this deny mode. If
732 the kernel refuses the operations then the kernel is wrong */
733 kernel_flock(fsp, deny_mode);
736 * At this point onwards, we can guarentee that the share entry
737 * is locked, whether we created the file or not, and that the
738 * deny mode is compatible with all current opens.
742 * If requested, truncate the file.
745 if (flags2&O_TRUNC) {
747 * We are modifing the file after open - update the stat struct..
749 if ((truncate_unless_locked(conn,fsp) == -1) || (vfs_fstat(fsp,fsp->fd,psbuf)==-1)) {
750 unlock_share_entry_fsp(fsp);
759 open_mode = DOS_OPEN_RDONLY;
762 open_mode = DOS_OPEN_RDWR;
765 open_mode = DOS_OPEN_WRONLY;
769 fsp->share_mode = SET_DENY_MODE(deny_mode) |
770 SET_OPEN_MODE(open_mode) |
771 SET_ALLOW_SHARE_DELETE(allow_share_delete);
774 (*Access) = open_mode;
777 if (file_existed && !(flags2 & O_TRUNC))
778 *action = FILE_WAS_OPENED;
780 *action = FILE_WAS_CREATED;
781 if (file_existed && (flags2 & O_TRUNC))
782 *action = FILE_WAS_OVERWRITTEN;
786 * Setup the oplock info in both the shared memory and
790 if(oplock_request && (num_share_modes == 0) &&
791 !IS_VETO_OPLOCK_PATH(conn,fname) && set_file_oplock(fsp, oplock_request) ) {
792 port = global_oplock_port;
793 } else if (oplock_request && all_current_opens_are_level_II) {
794 port = global_oplock_port;
795 oplock_request = LEVEL_II_OPLOCK;
796 set_file_oplock(fsp, oplock_request);
802 set_share_mode(fsp, port, oplock_request);
804 unlock_share_entry_fsp(fsp);
806 conn->num_files_open++;
811 /****************************************************************************
812 Open a file for permissions read only. Return a pseudo file entry
813 with the 'stat_open' flag set
814 ****************************************************************************/
816 files_struct *open_file_stat(connection_struct *conn, char *fname,
817 SMB_STRUCT_STAT *psbuf, int smb_ofun, int *action)
819 extern struct current_user current_user;
820 files_struct *fsp = NULL;
822 if (!VALID_STAT(*psbuf)) {
823 DEBUG(0,("open_file_stat: unable to stat name = %s. Error was %s\n", fname, strerror(errno) ));
827 if(S_ISDIR(psbuf->st_mode)) {
828 DEBUG(0,("open_file_stat: %s is a directory !\n", fname ));
836 *action = FILE_WAS_OPENED;
838 DEBUG(5,("open_file_stat: opening file %s as a stat entry\n", fname));
841 * Setup the files_struct for it.
845 fsp->mode = psbuf->st_mode;
846 fsp->inode = psbuf->st_ino;
847 fsp->dev = psbuf->st_dev;
848 GetTimeOfDay(&fsp->open_time);
849 fsp->size = psbuf->st_size;
850 fsp->vuid = current_user.vuid;
852 fsp->can_lock = False;
853 fsp->can_read = False;
854 fsp->can_write = False;
856 fsp->print_file = False;
857 fsp->modified = False;
858 fsp->oplock_type = NO_OPLOCK;
859 fsp->sent_oplock_break = NO_BREAK_SENT;
860 fsp->is_directory = False;
861 fsp->stat_open = True;
862 fsp->directory_delete_on_close = False;
865 * Note that the file name here is the *untranslated* name
866 * ie. it is still in the DOS codepage sent from the client.
867 * All use of this filename will pass though the sys_xxxx
868 * functions which will do the dos_to_unix translation before
869 * mapping into a UNIX filename. JRA.
871 string_set(&fsp->fsp_name,fname);
872 fsp->wbmpx_ptr = NULL;
873 fsp->wcp = NULL; /* Write cache pointer. */
875 conn->num_files_open++;
880 /****************************************************************************
881 Open a directory from an NT SMB call.
882 ****************************************************************************/
884 files_struct *open_directory(connection_struct *conn, char *fname,
885 SMB_STRUCT_STAT *psbuf, int smb_ofun, mode_t unixmode, int *action)
887 extern struct current_user current_user;
888 BOOL got_stat = False;
889 files_struct *fsp = file_new();
894 fsp->conn = conn; /* THe vfs_fXXX() macros need this. */
896 if (VALID_STAT(*psbuf))
899 if (got_stat && (GET_FILE_OPEN_DISPOSITION(smb_ofun) == FILE_EXISTS_FAIL)) {
901 errno = EEXIST; /* Setup so correct error is returned to client. */
905 if (GET_FILE_CREATE_DISPOSITION(smb_ofun) == FILE_CREATE_IF_NOT_EXIST) {
909 if(!S_ISDIR(psbuf->st_mode)) {
910 DEBUG(0,("open_directory: %s is not a directory !\n", fname ));
915 *action = FILE_WAS_OPENED;
920 * Try and create the directory.
923 if(!CAN_WRITE(conn)) {
924 DEBUG(2,("open_directory: failing create on read-only share\n"));
930 if(vfs_mkdir(conn,fname, unix_mode(conn,aDIR, fname)) < 0) {
931 DEBUG(0,("open_directory: unable to create %s. Error was %s\n",
932 fname, strerror(errno) ));
937 if(vfs_stat(conn,fname, psbuf) != 0) {
942 *action = FILE_WAS_CREATED;
948 * Don't create - just check that it *was* a directory.
952 DEBUG(0,("open_directory: unable to stat name = %s. Error was %s\n",
953 fname, strerror(errno) ));
958 if(!S_ISDIR(psbuf->st_mode)) {
959 DEBUG(0,("open_directory: %s is not a directory !\n", fname ));
964 *action = FILE_WAS_OPENED;
967 DEBUG(5,("open_directory: opening directory %s\n", fname));
970 * Setup the files_struct for it.
974 fsp->mode = psbuf->st_mode;
975 fsp->inode = psbuf->st_ino;
976 fsp->dev = psbuf->st_dev;
977 GetTimeOfDay(&fsp->open_time);
978 fsp->size = psbuf->st_size;
979 fsp->vuid = current_user.vuid;
981 fsp->can_lock = True;
982 fsp->can_read = False;
983 fsp->can_write = False;
985 fsp->print_file = False;
986 fsp->modified = False;
987 fsp->oplock_type = NO_OPLOCK;
988 fsp->sent_oplock_break = NO_BREAK_SENT;
989 fsp->is_directory = True;
990 fsp->directory_delete_on_close = False;
993 * Note that the file name here is the *untranslated* name
994 * ie. it is still in the DOS codepage sent from the client.
995 * All use of this filename will pass though the sys_xxxx
996 * functions which will do the dos_to_unix translation before
997 * mapping into a UNIX filename. JRA.
999 string_set(&fsp->fsp_name,fname);
1000 fsp->wbmpx_ptr = NULL;
1002 conn->num_files_open++;
1007 /*******************************************************************
1008 Check if the share mode on a file allows it to be deleted or unlinked.
1009 Return True if sharing doesn't prevent the operation.
1010 ********************************************************************/
1012 BOOL check_file_sharing(connection_struct *conn,char *fname, BOOL rename_op)
1016 share_mode_entry *old_shares = 0;
1017 int num_share_modes;
1018 SMB_STRUCT_STAT sbuf;
1019 pid_t pid = sys_getpid();
1023 if (vfs_stat(conn,fname,&sbuf) == -1)
1027 inode = sbuf.st_ino;
1029 lock_share_entry(conn, dev, inode);
1030 num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
1033 * Check if the share modes will give us access.
1036 if(num_share_modes != 0)
1043 broke_oplock = False;
1044 for(i = 0; i < num_share_modes; i++)
1046 share_mode_entry *share_entry = &old_shares[i];
1049 * Break oplocks before checking share modes. See comment in
1050 * open_file_shared for details.
1051 * Check if someone has an oplock on this file. If so we must
1052 * break it before continuing.
1054 if(BATCH_OPLOCK_TYPE(share_entry->op_type))
1059 /* JRA. Try removing this code to see if the new oplock changes
1060 fix the problem. I'm dubious, but Andrew is recommending we
1065 * It appears that the NT redirector may have a bug, in that
1066 * it tries to do an SMBmv on a file that it has open with a
1067 * batch oplock, and then fails to respond to the oplock break
1068 * request. This only seems to occur when the client is doing an
1069 * SMBmv to the smbd it is using - thus we try and detect this
1070 * condition by checking if the file being moved is open and oplocked by
1071 * this smbd process, and then not sending the oplock break in this
1072 * special case. If the file was open with a deny mode that
1073 * prevents the move the SMBmv will fail anyway with a share
1074 * violation error. JRA.
1076 if(rename_op && (share_entry->pid == pid))
1079 DEBUG(0,("check_file_sharing: NT redirector workaround - rename attempted on \
1080 batch oplocked file %s, dev = %x, inode = %.0f\n", fname, (unsigned int)dev, (double)inode));
1083 * This next line is a test that allows the deny-mode
1084 * processing to be skipped. This seems to be needed as
1085 * NT insists on the rename succeeding (in Office 9x no less !).
1086 * This should be removed as soon as (a) MS fix the redirector
1087 * bug or (b) NT SMB support in Samba makes NT not issue the
1088 * call (as is my fervent hope). JRA.
1096 DEBUG(5,("check_file_sharing: breaking oplock (%x) on file %s, \
1097 dev = %x, inode = %.0f\n", share_entry->op_type, fname, (unsigned int)dev, (double)inode));
1099 /* Oplock break.... */
1100 unlock_share_entry(conn, dev, inode);
1101 if(request_oplock_break(share_entry, dev, inode) == False)
1103 free((char *)old_shares);
1105 DEBUG(0,("check_file_sharing: FAILED when breaking oplock (%x) on file %s, \
1106 dev = %x, inode = %.0f\n", old_shares[i].op_type, fname, (unsigned int)dev, (double)inode));
1110 lock_share_entry(conn, dev, inode);
1111 broke_oplock = True;
1117 * If this is a delete request and ALLOW_SHARE_DELETE is set then allow
1118 * this to proceed. This takes precedence over share modes.
1121 if(!rename_op && GET_ALLOW_SHARE_DELETE(share_entry->share_mode))
1125 * Someone else has a share lock on it, check to see
1129 if ((GET_DENY_MODE(share_entry->share_mode) != DENY_DOS) ||
1130 (share_entry->pid != pid))
1137 free((char *)old_shares);
1138 num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
1140 } while(broke_oplock);
1143 /* XXXX exactly what share mode combinations should be allowed for
1144 deleting/renaming? */
1146 * If we got here then either there were no share modes or
1147 * all share modes were DENY_DOS and the pid == getpid() or
1148 * delete access was requested and all share modes had the
1149 * ALLOW_SHARE_DELETE bit set (takes precedence over other
1157 unlock_share_entry(conn, dev, inode);
1158 if(old_shares != NULL)
1159 free((char *)old_shares);