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 pstring sesssetup_user;
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)
37 int fd = conn->vfs_ops.open(dos_to_unix(fname,False),flags,mode);
39 /* Fix for files ending in '.' */
40 if((fd == -1) && (errno == ENOENT) &&
41 (strchr(fname,'.')==NULL)) {
43 fd = conn->vfs_ops.open(dos_to_unix(fname,False),flags,mode);
46 DEBUG(10,("fd_open: name %s, mode = %d, fd = %d. %s\n", fname, (int)mode, fd,
47 (fd == -1) ? strerror(errno) : "" ));
52 /****************************************************************************
53 Close the file associated with a fsp.
54 ****************************************************************************/
56 int fd_close(struct connection_struct *conn, files_struct *fsp)
61 * Deal with transferring any pending fd's if there
62 * are POSIX locks outstanding.
65 if(!fd_close_posix_locks(conn,fsp))
69 ret = conn->vfs_ops.close(fsp->fd);
76 /****************************************************************************
77 Check a filename for the pipe string.
78 ****************************************************************************/
80 static void check_for_pipe(char *fname)
82 /* special case of pipe opens */
84 StrnCpy(s,fname,sizeof(s)-1);
86 if (strstr(s,"pipe/")) {
87 DEBUG(3,("Rejecting named pipe open for %s\n",fname));
88 unix_ERR_class = ERRSRV;
89 unix_ERR_code = ERRaccess;
93 /****************************************************************************
95 ****************************************************************************/
97 static BOOL open_file(files_struct *fsp,connection_struct *conn,
98 char *fname1,int flags,mode_t mode)
100 extern struct current_user current_user;
102 int accmode = (flags & O_ACCMODE);
103 SMB_STRUCT_STAT sbuf;
106 fsp->oplock_type = NO_OPLOCK;
109 pstrcpy(fname,fname1);
111 /* Check permissions */
114 * This code was changed after seeing a client open request
115 * containing the open mode of (DENY_WRITE/read-only) with
116 * the 'create if not exist' bit set. The previous code
117 * would fail to open the file read only on a read-only share
118 * as it was checking the flags parameter directly against O_RDONLY,
119 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
123 if (!CAN_WRITE(conn)) {
124 /* It's a read-only share - fail if we wanted to write. */
125 if(accmode != O_RDONLY) {
126 DEBUG(3,("Permission denied opening %s\n",fname));
127 check_for_pipe(fname);
129 } else if(flags & O_CREAT) {
130 /* We don't want to write - but we must make sure that O_CREAT
131 doesn't create the file if we have write access into the
138 /* actually do the open */
139 fsp->fd = fd_open(conn, fname, flags, mode);
142 DEBUG(3,("Error opening file %s (%s) (flags=%d)\n",
143 fname,strerror(errno),flags));
144 check_for_pipe(fname);
148 conn->vfs_ops.fstat(fsp->fd, &sbuf);
151 * POSIX allows read-only opens of directories. We don't
152 * want to do this (we use a different code path for this)
153 * so catch a directory open and return an EISDIR. JRA.
156 if(S_ISDIR(sbuf.st_mode)) {
162 fsp->mode = sbuf.st_mode;
163 fsp->inode = sbuf.st_ino;
164 fsp->dev = sbuf.st_dev;
165 GetTimeOfDay(&fsp->open_time);
166 fsp->vuid = current_user.vuid;
169 fsp->can_lock = True;
170 fsp->can_read = ((flags & O_WRONLY)==0);
171 fsp->can_write = ((flags & (O_WRONLY|O_RDWR))!=0);
173 fsp->print_file = False;
174 fsp->modified = False;
175 fsp->oplock_type = NO_OPLOCK;
176 fsp->sent_oplock_break = NO_BREAK_SENT;
177 fsp->is_directory = False;
178 fsp->stat_open = False;
179 fsp->directory_delete_on_close = False;
182 * Note that the file name here is the *untranslated* name
183 * ie. it is still in the DOS codepage sent from the client.
184 * All use of this filename will pass though the sys_xxxx
185 * functions which will do the dos_to_unix translation before
186 * mapping into a UNIX filename. JRA.
188 string_set(&fsp->fsp_name,fname);
189 fsp->wbmpx_ptr = NULL;
190 fsp->wcp = NULL; /* Write cache pointer. */
192 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
193 *sesssetup_user ? sesssetup_user : conn->user,fsp->fsp_name,
194 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
195 conn->num_files_open + 1));
200 /****************************************************************************
202 Helper for open_file_shared.
203 Truncate a file after checking locking; close file if locked.
204 **************************************************************************/
206 static int truncate_unless_locked(struct connection_struct *conn, files_struct *fsp)
208 SMB_BIG_UINT mask = (SMB_BIG_UINT)-1;
213 if (is_locked(fsp,fsp->conn,mask,0,WRITE_LOCK)){
215 unix_ERR_class = ERRDOS;
216 unix_ERR_code = ERRlock;
219 return conn->vfs_ops.ftruncate(fsp->fd,0);
223 /*******************************************************************
224 return True if the filename is one of the special executable types
225 ********************************************************************/
226 static BOOL is_executable(const char *fname)
228 if ((fname = strrchr(fname,'.'))) {
229 if (strequal(fname,".com") ||
230 strequal(fname,".dll") ||
231 strequal(fname,".exe") ||
232 strequal(fname,".sym")) {
239 enum {AFAIL,AREAD,AWRITE,AALL};
241 /*******************************************************************
242 reproduce the share mode access table
243 this is horrendoously complex, and really can't be justified on any
244 rational grounds except that this is _exactly_ what NT does. See
245 the DENY1 and DENY2 tests in smbtorture for a comprehensive set of
247 ********************************************************************/
248 static int access_table(int new_deny,int old_deny,int old_mode,
249 BOOL same_pid, BOOL isexe)
251 if (new_deny == DENY_ALL || old_deny == DENY_ALL) return(AFAIL);
254 if (isexe && old_mode == DOS_OPEN_RDONLY &&
255 old_deny == DENY_DOS && new_deny == DENY_READ) {
258 if (!isexe && old_mode == DOS_OPEN_RDONLY &&
259 old_deny == DENY_DOS && new_deny == DENY_DOS) {
262 if (new_deny == DENY_FCB && old_deny == DENY_DOS) {
263 if (isexe) return AFAIL;
264 if (old_mode == DOS_OPEN_RDONLY) return AFAIL;
267 if (old_mode == DOS_OPEN_RDONLY && old_deny == DENY_DOS) {
268 if (new_deny == DENY_FCB || new_deny == DENY_READ) {
269 if (isexe) return AREAD;
273 if (old_deny == DENY_FCB) {
274 if (new_deny == DENY_DOS || new_deny == DENY_FCB) return AALL;
279 if (old_deny == DENY_DOS || new_deny == DENY_DOS ||
280 old_deny == DENY_FCB || new_deny == DENY_FCB) {
282 if (old_deny == DENY_FCB || new_deny == DENY_FCB) {
285 if (old_deny == DENY_DOS) {
286 if (new_deny == DENY_READ &&
287 (old_mode == DOS_OPEN_RDONLY ||
288 old_mode == DOS_OPEN_RDWR)) {
291 if (new_deny == DENY_WRITE &&
292 (old_mode == DOS_OPEN_WRONLY ||
293 old_mode == DOS_OPEN_RDWR)) {
298 if (old_deny == DENY_NONE) return AALL;
299 if (old_deny == DENY_READ) return AWRITE;
300 if (old_deny == DENY_WRITE) return AREAD;
302 /* it isn't a exe, dll, sym or com file */
303 if (old_deny == new_deny && same_pid)
306 if (old_deny == DENY_READ || new_deny == DENY_READ) return AFAIL;
307 if (old_mode == DOS_OPEN_RDONLY) return(AREAD);
315 if (old_deny==DENY_WRITE && old_mode==DOS_OPEN_RDONLY) return(AREAD);
316 if (old_deny==DENY_READ && old_mode==DOS_OPEN_RDONLY) return(AWRITE);
317 if (old_deny==DENY_NONE && old_mode==DOS_OPEN_RDONLY) return(AALL);
320 if (old_deny==DENY_WRITE && old_mode==DOS_OPEN_WRONLY) return(AREAD);
321 if (old_deny==DENY_READ && old_mode==DOS_OPEN_WRONLY) return(AWRITE);
322 if (old_deny==DENY_NONE && old_mode==DOS_OPEN_WRONLY) return(AALL);
325 if (old_deny==DENY_WRITE) return(AREAD);
326 if (old_deny==DENY_READ) return(AWRITE);
327 if (old_deny==DENY_NONE) return(AALL);
334 /****************************************************************************
335 check if we can open a file with a share mode
336 ****************************************************************************/
338 static int check_share_mode( share_mode_entry *share, int deny_mode,
339 const char *fname, BOOL fcbopen, int *flags)
341 int old_open_mode = GET_OPEN_MODE(share->share_mode);
342 int old_deny_mode = GET_DENY_MODE(share->share_mode);
345 * Don't allow any open once the delete on close flag has been
349 if(GET_DELETE_ON_CLOSE_FLAG(share->share_mode)) {
350 DEBUG(5,("check_share_mode: Failing open on file %s as delete on close flag is set.\n",
352 unix_ERR_class = ERRDOS;
353 unix_ERR_code = ERRnoaccess;
358 int access_allowed = access_table(deny_mode,old_deny_mode,old_open_mode,
359 (share->pid == getpid()),is_executable(fname));
361 if ((access_allowed == AFAIL) ||
362 (!fcbopen && (access_allowed == AREAD && *flags == O_RDWR)) ||
363 (access_allowed == AREAD && *flags != O_RDONLY) ||
364 (access_allowed == AWRITE && *flags != O_WRONLY)) {
366 DEBUG(2,("Share violation on file (%d,%d,%d,%d,%s,fcbopen = %d, flags = %d) = %d\n",
367 deny_mode,old_deny_mode,old_open_mode,
368 (int)share->pid,fname, fcbopen, *flags, access_allowed));
370 unix_ERR_class = ERRDOS;
371 unix_ERR_code = ERRbadshare;
376 if (access_allowed == AREAD)
379 if (access_allowed == AWRITE)
387 /****************************************************************************
388 Deal with open deny mode and oplock break processing.
389 Invarient: Share mode must be locked on entry and exit.
390 Returns -1 on error, or number of share modes on success (may be zero).
391 ****************************************************************************/
393 static int open_mode_check(connection_struct *conn, const char *fname, SMB_DEV_T dev,
394 SMB_INO_T inode, int share_mode, int *p_flags, int *p_oplock_request,
395 BOOL *p_all_current_opens_are_level_II)
399 int oplock_contention_count = 0;
400 share_mode_entry *old_shares = 0;
401 BOOL fcbopen = False;
402 int deny_mode = GET_DENY_MODE(share_mode);
405 if(GET_OPEN_MODE(share_mode) == DOS_OPEN_FCB)
408 num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
410 if(num_share_modes == 0)
414 * Check if the share modes will give us access.
419 broke_oplock = False;
420 *p_all_current_opens_are_level_II = True;
422 for(i = 0; i < num_share_modes; i++) {
423 share_mode_entry *share_entry = &old_shares[i];
426 * By observation of NetBench, oplocks are broken *before* share
427 * modes are checked. This allows a file to be closed by the client
428 * if the share mode would deny access and the client has an oplock.
429 * Check if someone has an oplock on this file. If so we must break
430 * it before continuing.
433 if((*p_oplock_request && EXCLUSIVE_OPLOCK_TYPE(share_entry->op_type)) ||
434 (!*p_oplock_request && (share_entry->op_type != NO_OPLOCK))) {
438 DEBUG(5,("open_mode_check: breaking oplock (%x) on file %s, \
439 dev = %x, inode = %.0f\n", share_entry->op_type, fname, (unsigned int)dev, (double)inode));
441 /* Oplock break - unlock to request it. */
442 unlock_share_entry(conn, dev, inode);
444 opb_ret = request_oplock_break(share_entry, dev, inode);
447 lock_share_entry(conn, dev, inode);
449 if(opb_ret == False) {
450 free((char *)old_shares);
451 DEBUG(0,("open_mode_check: FAILED when breaking oplock (%x) on file %s, \
452 dev = %x, inode = %.0f\n", old_shares[i].op_type, fname, (unsigned int)dev, (double)inode));
454 unix_ERR_class = ERRDOS;
455 unix_ERR_code = ERRbadshare;
460 *p_all_current_opens_are_level_II = False;
463 } else if (!LEVEL_II_OPLOCK_TYPE(share_entry->op_type)) {
464 *p_all_current_opens_are_level_II = False;
467 /* someone else has a share lock on it, check to see
470 if(check_share_mode(share_entry, deny_mode, fname, fcbopen, p_flags) == False) {
471 free((char *)old_shares);
479 free((char *)old_shares);
480 num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
481 oplock_contention_count++;
483 } while(broke_oplock);
486 free((char *)old_shares);
489 * Refuse to grant an oplock in case the contention limit is
490 * reached when going through the lock list multiple times.
493 if(oplock_contention_count >= lp_oplock_contention_limit(SNUM(conn))) {
494 *p_oplock_request = 0;
495 DEBUG(4,("open_mode_check: oplock contention = %d. Not granting oplock.\n",
496 oplock_contention_count ));
499 return num_share_modes;
502 /****************************************************************************
503 Open a file with a share mode.
504 ****************************************************************************/
506 files_struct *open_file_shared(connection_struct *conn,char *fname,int share_mode,int ofun,
507 mode_t mode,int oplock_request, int *Access,int *action)
511 int deny_mode = GET_DENY_MODE(share_mode);
512 BOOL allow_share_delete = GET_ALLOW_SHARE_DELETE(share_mode);
513 SMB_STRUCT_STAT sbuf;
514 BOOL file_existed = vfs_file_exist(conn, fname, &sbuf);
515 BOOL fcbopen = False;
518 int num_share_modes = 0;
519 BOOL all_current_opens_are_level_II = False;
520 BOOL fsp_open = False;
521 files_struct *fsp = NULL;
526 /* printers are handled completely differently. Most of the passed parameters are
528 *Access = DOS_OPEN_WRONLY;
529 *action = FILE_WAS_CREATED;
530 return print_fsp_open(conn, fname);
539 DEBUG(10,("open_file_shared: fname = %s, share_mode = %x, ofun = %x, mode = %o, oplock request = %d\n",
540 fname, share_mode, ofun, (int)mode, oplock_request ));
542 if (!check_name(fname,conn)) {
547 /* ignore any oplock requests if oplocks are disabled */
548 if (!lp_oplocks(SNUM(conn)) || global_client_failed_oplock_break) {
552 /* this is for OS/2 EAs - try and say we don't support them */
553 if (strstr(fname,".+,;=[].")) {
554 unix_ERR_class = ERRDOS;
555 /* OS/2 Workplace shell fix may be main code stream in a later release. */
556 #if 1 /* OS2_WPS_FIX - Recent versions of OS/2 need this. */
557 unix_ERR_code = ERRcannotopen;
558 #else /* OS2_WPS_FIX */
559 unix_ERR_code = ERROR_EAS_NOT_SUPPORTED;
560 #endif /* OS2_WPS_FIX */
562 DEBUG(5,("open_file_shared: OS/2 EA's are not supported.\n"));
567 if ((GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_FAIL) && file_existed) {
568 DEBUG(5,("open_file_shared: create new requested for file %s and file already exists.\n",
575 if (GET_FILE_CREATE_DISPOSITION(ofun) == FILE_CREATE_IF_NOT_EXIST)
578 if (GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_TRUNCATE)
581 if (GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_FAIL)
584 /* note that we ignore the append flag as
585 append does not mean the same thing under dos and unix */
587 switch (GET_OPEN_MODE(share_mode)) {
588 case DOS_OPEN_WRONLY:
604 if (GET_FILE_SYNC_OPENMODE(share_mode)) {
609 if (flags != O_RDONLY && file_existed &&
610 (!CAN_WRITE(conn) || IS_DOS_READONLY(dos_mode(conn,fname,&sbuf)))) {
612 DEBUG(5,("open_file_shared: read/write access requested for file %s on read only %s\n",
613 fname, !CAN_WRITE(conn) ? "share" : "file" ));
621 if (deny_mode > DENY_NONE && deny_mode!=DENY_FCB) {
622 DEBUG(2,("Invalid deny mode %d on file %s\n",deny_mode,fname));
632 lock_share_entry(conn, dev, inode);
634 num_share_modes = open_mode_check(conn, fname, dev, inode, share_mode,
635 &flags, &oplock_request, &all_current_opens_are_level_II);
636 if(num_share_modes == -1) {
637 unlock_share_entry(conn, dev, inode);
643 * We exit this block with the share entry *locked*.....
647 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o\n",
648 flags,flags2,(int)mode));
650 fsp_open = open_file(fsp,conn,fname,flags|(flags2&~(O_TRUNC)),mode);
652 if (!fsp_open && (flags == O_RDWR) && (errno != ENOENT) && fcbopen) {
653 if((fsp_open = open_file(fsp,conn,fname,O_RDONLY,mode)) == True)
659 unlock_share_entry(conn, dev, inode);
665 * Deal with the race condition where two smbd's detect the file doesn't
666 * exist and do the create at the same time. One of them will win and
667 * set a share mode, the other (ie. this one) should check if the
668 * requested share mode for this create is allowed.
673 lock_share_entry_fsp(fsp);
675 num_share_modes = open_mode_check(conn, fname, dev, inode, share_mode,
676 &flags, &oplock_request, &all_current_opens_are_level_II);
678 if(num_share_modes == -1) {
679 unlock_share_entry_fsp(fsp);
686 * We exit this block with the share entry *locked*.....
691 * At this point onwards, we can guarentee that the share entry
692 * is locked, whether we created the file or not, and that the
693 * deny mode is compatible with all current opens.
697 * If requested, truncate the file.
700 if ((flags2&O_TRUNC) && (truncate_unless_locked(conn,fsp) == -1)) {
701 unlock_share_entry_fsp(fsp);
709 open_mode = DOS_OPEN_RDONLY;
712 open_mode = DOS_OPEN_RDWR;
715 open_mode = DOS_OPEN_WRONLY;
719 fsp->share_mode = SET_DENY_MODE(deny_mode) |
720 SET_OPEN_MODE(open_mode) |
721 SET_ALLOW_SHARE_DELETE(allow_share_delete);
724 (*Access) = open_mode;
727 if (file_existed && !(flags2 & O_TRUNC))
728 *action = FILE_WAS_OPENED;
730 *action = FILE_WAS_CREATED;
731 if (file_existed && (flags2 & O_TRUNC))
732 *action = FILE_WAS_OVERWRITTEN;
736 * Setup the oplock info in both the shared memory and
740 if(oplock_request && (num_share_modes == 0) &&
741 !IS_VETO_OPLOCK_PATH(conn,fname) && set_file_oplock(fsp, oplock_request) ) {
742 port = global_oplock_port;
743 } else if (oplock_request && all_current_opens_are_level_II) {
744 port = global_oplock_port;
745 oplock_request = LEVEL_II_OPLOCK;
746 set_file_oplock(fsp, oplock_request);
752 set_share_mode(fsp, port, oplock_request);
754 unlock_share_entry_fsp(fsp);
756 conn->num_files_open++;
761 /****************************************************************************
762 Open a file for permissions read only. Return a pseudo file entry
763 with the 'stat_open' flag set
764 ****************************************************************************/
766 files_struct *open_file_stat(connection_struct *conn,
767 char *fname, int smb_ofun, SMB_STRUCT_STAT *pst, int *action)
769 extern struct current_user current_user;
770 files_struct *fsp = file_new();
775 if(conn->vfs_ops.stat(dos_to_unix(fname, False), pst) < 0) {
776 DEBUG(0,("open_file_stat: unable to stat name = %s. Error was %s\n",
777 fname, strerror(errno) ));
782 if(S_ISDIR(pst->st_mode)) {
783 DEBUG(0,("open_file_stat: %s is a directory !\n", fname ));
788 *action = FILE_WAS_OPENED;
790 DEBUG(5,("open_file_stat: opening file %s as a stat entry\n", fname));
793 * Setup the files_struct for it.
798 GetTimeOfDay(&fsp->open_time);
799 fsp->vuid = current_user.vuid;
802 fsp->can_lock = False;
803 fsp->can_read = False;
804 fsp->can_write = False;
806 fsp->print_file = False;
807 fsp->modified = False;
808 fsp->oplock_type = NO_OPLOCK;
809 fsp->sent_oplock_break = NO_BREAK_SENT;
810 fsp->is_directory = False;
811 fsp->stat_open = True;
812 fsp->directory_delete_on_close = False;
815 * Note that the file name here is the *untranslated* name
816 * ie. it is still in the DOS codepage sent from the client.
817 * All use of this filename will pass though the sys_xxxx
818 * functions which will do the dos_to_unix translation before
819 * mapping into a UNIX filename. JRA.
821 string_set(&fsp->fsp_name,fname);
822 fsp->wbmpx_ptr = NULL;
823 fsp->wcp = NULL; /* Write cache pointer. */
825 conn->num_files_open++;
830 /****************************************************************************
831 Open a directory from an NT SMB call.
832 ****************************************************************************/
834 files_struct *open_directory(connection_struct *conn,
835 char *fname, int smb_ofun, mode_t unixmode, int *action)
837 extern struct current_user current_user;
839 BOOL got_stat = False;
840 files_struct *fsp = file_new();
845 if(conn->vfs_ops.stat(dos_to_unix(fname, False), &st) == 0) {
849 if (got_stat && (GET_FILE_OPEN_DISPOSITION(smb_ofun) == FILE_EXISTS_FAIL)) {
851 errno = EEXIST; /* Setup so correct error is returned to client. */
855 if (GET_FILE_CREATE_DISPOSITION(smb_ofun) == FILE_CREATE_IF_NOT_EXIST) {
859 if(!S_ISDIR(st.st_mode)) {
860 DEBUG(0,("open_directory: %s is not a directory !\n", fname ));
865 *action = FILE_WAS_OPENED;
870 * Try and create the directory.
873 if(!CAN_WRITE(conn)) {
874 DEBUG(2,("open_directory: failing create on read-only share\n"));
880 if(conn->vfs_ops.mkdir(dos_to_unix(fname, False),
881 unix_mode(conn,aDIR, fname)) < 0) {
882 DEBUG(0,("open_directory: unable to create %s. Error was %s\n",
883 fname, strerror(errno) ));
887 *action = FILE_WAS_CREATED;
893 * Don't create - just check that it *was* a directory.
897 DEBUG(0,("open_directory: unable to stat name = %s. Error was %s\n",
898 fname, strerror(errno) ));
903 if(!S_ISDIR(st.st_mode)) {
904 DEBUG(0,("open_directory: %s is not a directory !\n", fname ));
909 *action = FILE_WAS_OPENED;
912 DEBUG(5,("open_directory: opening directory %s\n",
916 * Setup the files_struct for it.
921 GetTimeOfDay(&fsp->open_time);
922 fsp->vuid = current_user.vuid;
925 fsp->can_lock = True;
926 fsp->can_read = False;
927 fsp->can_write = False;
929 fsp->print_file = False;
930 fsp->modified = False;
931 fsp->oplock_type = NO_OPLOCK;
932 fsp->sent_oplock_break = NO_BREAK_SENT;
933 fsp->is_directory = True;
934 fsp->directory_delete_on_close = False;
937 * Note that the file name here is the *untranslated* name
938 * ie. it is still in the DOS codepage sent from the client.
939 * All use of this filename will pass though the sys_xxxx
940 * functions which will do the dos_to_unix translation before
941 * mapping into a UNIX filename. JRA.
943 string_set(&fsp->fsp_name,fname);
944 fsp->wbmpx_ptr = NULL;
946 conn->num_files_open++;
951 /*******************************************************************
952 Check if the share mode on a file allows it to be deleted or unlinked.
953 Return True if sharing doesn't prevent the operation.
954 ********************************************************************/
956 BOOL check_file_sharing(connection_struct *conn,char *fname, BOOL rename_op)
960 share_mode_entry *old_shares = 0;
962 SMB_STRUCT_STAT sbuf;
963 pid_t pid = getpid();
967 if (conn->vfs_ops.stat(dos_to_unix(fname,False),&sbuf) == -1)
973 lock_share_entry(conn, dev, inode);
974 num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
977 * Check if the share modes will give us access.
980 if(num_share_modes != 0)
987 broke_oplock = False;
988 for(i = 0; i < num_share_modes; i++)
990 share_mode_entry *share_entry = &old_shares[i];
993 * Break oplocks before checking share modes. See comment in
994 * open_file_shared for details.
995 * Check if someone has an oplock on this file. If so we must
996 * break it before continuing.
998 if(BATCH_OPLOCK_TYPE(share_entry->op_type))
1003 /* JRA. Try removing this code to see if the new oplock changes
1004 fix the problem. I'm dubious, but Andrew is recommending we
1009 * It appears that the NT redirector may have a bug, in that
1010 * it tries to do an SMBmv on a file that it has open with a
1011 * batch oplock, and then fails to respond to the oplock break
1012 * request. This only seems to occur when the client is doing an
1013 * SMBmv to the smbd it is using - thus we try and detect this
1014 * condition by checking if the file being moved is open and oplocked by
1015 * this smbd process, and then not sending the oplock break in this
1016 * special case. If the file was open with a deny mode that
1017 * prevents the move the SMBmv will fail anyway with a share
1018 * violation error. JRA.
1020 if(rename_op && (share_entry->pid == pid))
1023 DEBUG(0,("check_file_sharing: NT redirector workaround - rename attempted on \
1024 batch oplocked file %s, dev = %x, inode = %.0f\n", fname, (unsigned int)dev, (double)inode));
1027 * This next line is a test that allows the deny-mode
1028 * processing to be skipped. This seems to be needed as
1029 * NT insists on the rename succeeding (in Office 9x no less !).
1030 * This should be removed as soon as (a) MS fix the redirector
1031 * bug or (b) NT SMB support in Samba makes NT not issue the
1032 * call (as is my fervent hope). JRA.
1040 DEBUG(5,("check_file_sharing: breaking oplock (%x) on file %s, \
1041 dev = %x, inode = %.0f\n", share_entry->op_type, fname, (unsigned int)dev, (double)inode));
1043 /* Oplock break.... */
1044 unlock_share_entry(conn, dev, inode);
1045 if(request_oplock_break(share_entry, dev, inode) == False)
1047 free((char *)old_shares);
1049 DEBUG(0,("check_file_sharing: FAILED when breaking oplock (%x) on file %s, \
1050 dev = %x, inode = %.0f\n", old_shares[i].op_type, fname, (unsigned int)dev, (double)inode));
1054 lock_share_entry(conn, dev, inode);
1055 broke_oplock = True;
1061 * If this is a delete request and ALLOW_SHARE_DELETE is set then allow
1062 * this to proceed. This takes precedence over share modes.
1065 if(!rename_op && GET_ALLOW_SHARE_DELETE(share_entry->share_mode))
1069 * Someone else has a share lock on it, check to see
1073 if ((GET_DENY_MODE(share_entry->share_mode) != DENY_DOS) ||
1074 (share_entry->pid != pid))
1081 free((char *)old_shares);
1082 num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
1084 } while(broke_oplock);
1087 /* XXXX exactly what share mode combinations should be allowed for
1088 deleting/renaming? */
1090 * If we got here then either there were no share modes or
1091 * all share modes were DENY_DOS and the pid == getpid() or
1092 * delete access was requested and all share modes had the
1093 * ALLOW_SHARE_DELETE bit set (takes precedence over other
1101 unlock_share_entry(conn, dev, inode);
1102 if(old_shares != NULL)
1103 free((char *)old_shares);