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)
58 return fd_close_posix(conn, fsp);
62 /****************************************************************************
63 Check a filename for the pipe string.
64 ****************************************************************************/
66 static void check_for_pipe(char *fname)
68 /* special case of pipe opens */
70 StrnCpy(s,fname,sizeof(s)-1);
72 if (strstr(s,"pipe/")) {
73 DEBUG(3,("Rejecting named pipe open for %s\n",fname));
74 unix_ERR_class = ERRSRV;
75 unix_ERR_code = ERRaccess;
79 /****************************************************************************
81 ****************************************************************************/
83 static BOOL open_file(files_struct *fsp,connection_struct *conn,
84 char *fname1,int flags,mode_t mode)
86 extern struct current_user current_user;
88 int accmode = (flags & O_ACCMODE);
92 fsp->oplock_type = NO_OPLOCK;
95 pstrcpy(fname,fname1);
97 /* Check permissions */
100 * This code was changed after seeing a client open request
101 * containing the open mode of (DENY_WRITE/read-only) with
102 * the 'create if not exist' bit set. The previous code
103 * would fail to open the file read only on a read-only share
104 * as it was checking the flags parameter directly against O_RDONLY,
105 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
109 if (!CAN_WRITE(conn)) {
110 /* It's a read-only share - fail if we wanted to write. */
111 if(accmode != O_RDONLY) {
112 DEBUG(3,("Permission denied opening %s\n",fname));
113 check_for_pipe(fname);
115 } else if(flags & O_CREAT) {
116 /* We don't want to write - but we must make sure that O_CREAT
117 doesn't create the file if we have write access into the
124 /* actually do the open */
125 fsp->fd = fd_open(conn, fname, flags, mode);
128 DEBUG(3,("Error opening file %s (%s) (flags=%d)\n",
129 fname,strerror(errno),flags));
130 check_for_pipe(fname);
134 conn->vfs_ops.fstat(fsp->fd, &sbuf);
137 * POSIX allows read-only opens of directories. We don't
138 * want to do this (we use a different code path for this)
139 * so catch a directory open and return an EISDIR. JRA.
142 if(S_ISDIR(sbuf.st_mode)) {
148 fsp->mode = sbuf.st_mode;
149 fsp->inode = sbuf.st_ino;
150 fsp->dev = sbuf.st_dev;
151 GetTimeOfDay(&fsp->open_time);
152 fsp->vuid = current_user.vuid;
155 fsp->can_lock = True;
156 fsp->can_read = ((flags & O_WRONLY)==0);
157 fsp->can_write = ((flags & (O_WRONLY|O_RDWR))!=0);
159 fsp->print_file = False;
160 fsp->modified = False;
161 fsp->oplock_type = NO_OPLOCK;
162 fsp->sent_oplock_break = NO_BREAK_SENT;
163 fsp->is_directory = False;
164 fsp->stat_open = False;
165 fsp->directory_delete_on_close = False;
168 * Note that the file name here is the *untranslated* name
169 * ie. it is still in the DOS codepage sent from the client.
170 * All use of this filename will pass though the sys_xxxx
171 * functions which will do the dos_to_unix translation before
172 * mapping into a UNIX filename. JRA.
174 string_set(&fsp->fsp_name,fname);
175 fsp->wbmpx_ptr = NULL;
176 fsp->wcp = NULL; /* Write cache pointer. */
178 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
179 *sesssetup_user ? sesssetup_user : conn->user,fsp->fsp_name,
180 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
181 conn->num_files_open + 1));
186 /****************************************************************************
188 Helper for open_file_shared.
189 Truncate a file after checking locking; close file if locked.
190 **************************************************************************/
192 static int truncate_unless_locked(struct connection_struct *conn, files_struct *fsp)
194 SMB_BIG_UINT mask = (SMB_BIG_UINT)-1;
199 if (is_locked(fsp,fsp->conn,mask,0,WRITE_LOCK)){
201 unix_ERR_class = ERRDOS;
202 unix_ERR_code = ERRlock;
205 return conn->vfs_ops.ftruncate(fsp->fd,0);
209 /*******************************************************************
210 return True if the filename is one of the special executable types
211 ********************************************************************/
212 static BOOL is_executable(const char *fname)
214 if ((fname = strrchr(fname,'.'))) {
215 if (strequal(fname,".com") ||
216 strequal(fname,".dll") ||
217 strequal(fname,".exe") ||
218 strequal(fname,".sym")) {
225 enum {AFAIL,AREAD,AWRITE,AALL};
227 /*******************************************************************
228 reproduce the share mode access table
229 this is horrendoously complex, and really can't be justified on any
230 rational grounds except that this is _exactly_ what NT does. See
231 the DENY1 and DENY2 tests in smbtorture for a comprehensive set of
233 ********************************************************************/
234 static int access_table(int new_deny,int old_deny,int old_mode,
235 BOOL same_pid, BOOL isexe)
237 if (new_deny == DENY_ALL || old_deny == DENY_ALL) return(AFAIL);
240 if (isexe && old_mode == DOS_OPEN_RDONLY &&
241 old_deny == DENY_DOS && new_deny == DENY_READ) {
244 if (!isexe && old_mode == DOS_OPEN_RDONLY &&
245 old_deny == DENY_DOS && new_deny == DENY_DOS) {
248 if (new_deny == DENY_FCB && old_deny == DENY_DOS) {
249 if (isexe) return AFAIL;
250 if (old_mode == DOS_OPEN_RDONLY) return AFAIL;
253 if (old_mode == DOS_OPEN_RDONLY && old_deny == DENY_DOS) {
254 if (new_deny == DENY_FCB || new_deny == DENY_READ) {
255 if (isexe) return AREAD;
259 if (old_deny == DENY_FCB) {
260 if (new_deny == DENY_DOS || new_deny == DENY_FCB) return AALL;
265 if (old_deny == DENY_DOS || new_deny == DENY_DOS ||
266 old_deny == DENY_FCB || new_deny == DENY_FCB) {
268 if (old_deny == DENY_FCB || new_deny == DENY_FCB) {
271 if (old_deny == DENY_DOS) {
272 if (new_deny == DENY_READ &&
273 (old_mode == DOS_OPEN_RDONLY ||
274 old_mode == DOS_OPEN_RDWR)) {
277 if (new_deny == DENY_WRITE &&
278 (old_mode == DOS_OPEN_WRONLY ||
279 old_mode == DOS_OPEN_RDWR)) {
284 if (old_deny == DENY_NONE) return AALL;
285 if (old_deny == DENY_READ) return AWRITE;
286 if (old_deny == DENY_WRITE) return AREAD;
288 /* it isn't a exe, dll, sym or com file */
289 if (old_deny == new_deny && same_pid)
292 if (old_deny == DENY_READ || new_deny == DENY_READ) return AFAIL;
293 if (old_mode == DOS_OPEN_RDONLY) return(AREAD);
301 if (old_deny==DENY_WRITE && old_mode==DOS_OPEN_RDONLY) return(AREAD);
302 if (old_deny==DENY_READ && old_mode==DOS_OPEN_RDONLY) return(AWRITE);
303 if (old_deny==DENY_NONE && old_mode==DOS_OPEN_RDONLY) return(AALL);
306 if (old_deny==DENY_WRITE && old_mode==DOS_OPEN_WRONLY) return(AREAD);
307 if (old_deny==DENY_READ && old_mode==DOS_OPEN_WRONLY) return(AWRITE);
308 if (old_deny==DENY_NONE && old_mode==DOS_OPEN_WRONLY) return(AALL);
311 if (old_deny==DENY_WRITE) return(AREAD);
312 if (old_deny==DENY_READ) return(AWRITE);
313 if (old_deny==DENY_NONE) return(AALL);
320 /****************************************************************************
321 check if we can open a file with a share mode
322 ****************************************************************************/
324 static int check_share_mode( share_mode_entry *share, int deny_mode,
325 const char *fname, BOOL fcbopen, int *flags)
327 int old_open_mode = GET_OPEN_MODE(share->share_mode);
328 int old_deny_mode = GET_DENY_MODE(share->share_mode);
331 * Don't allow any open once the delete on close flag has been
335 if(GET_DELETE_ON_CLOSE_FLAG(share->share_mode)) {
336 DEBUG(5,("check_share_mode: Failing open on file %s as delete on close flag is set.\n",
338 unix_ERR_class = ERRDOS;
339 unix_ERR_code = ERRnoaccess;
344 int access_allowed = access_table(deny_mode,old_deny_mode,old_open_mode,
345 (share->pid == sys_getpid()),is_executable(fname));
347 if ((access_allowed == AFAIL) ||
348 (!fcbopen && (access_allowed == AREAD && *flags == O_RDWR)) ||
349 (access_allowed == AREAD && *flags != O_RDONLY) ||
350 (access_allowed == AWRITE && *flags != O_WRONLY)) {
352 DEBUG(2,("Share violation on file (%d,%d,%d,%d,%s,fcbopen = %d, flags = %d) = %d\n",
353 deny_mode,old_deny_mode,old_open_mode,
354 (int)share->pid,fname, fcbopen, *flags, access_allowed));
356 unix_ERR_class = ERRDOS;
357 unix_ERR_code = ERRbadshare;
362 if (access_allowed == AREAD)
365 if (access_allowed == AWRITE)
373 /****************************************************************************
374 Deal with open deny mode and oplock break processing.
375 Invarient: Share mode must be locked on entry and exit.
376 Returns -1 on error, or number of share modes on success (may be zero).
377 ****************************************************************************/
379 static int open_mode_check(connection_struct *conn, const char *fname, SMB_DEV_T dev,
380 SMB_INO_T inode, int share_mode, int *p_flags, int *p_oplock_request,
381 BOOL *p_all_current_opens_are_level_II)
385 int oplock_contention_count = 0;
386 share_mode_entry *old_shares = 0;
387 BOOL fcbopen = False;
388 int deny_mode = GET_DENY_MODE(share_mode);
391 if(GET_OPEN_MODE(share_mode) == DOS_OPEN_FCB)
394 num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
396 if(num_share_modes == 0)
400 * Check if the share modes will give us access.
405 broke_oplock = False;
406 *p_all_current_opens_are_level_II = True;
408 for(i = 0; i < num_share_modes; i++) {
409 share_mode_entry *share_entry = &old_shares[i];
412 * By observation of NetBench, oplocks are broken *before* share
413 * modes are checked. This allows a file to be closed by the client
414 * if the share mode would deny access and the client has an oplock.
415 * Check if someone has an oplock on this file. If so we must break
416 * it before continuing.
419 if((*p_oplock_request && EXCLUSIVE_OPLOCK_TYPE(share_entry->op_type)) ||
420 (!*p_oplock_request && (share_entry->op_type != NO_OPLOCK))) {
424 DEBUG(5,("open_mode_check: breaking oplock (%x) on file %s, \
425 dev = %x, inode = %.0f\n", share_entry->op_type, fname, (unsigned int)dev, (double)inode));
427 /* Oplock break - unlock to request it. */
428 unlock_share_entry(conn, dev, inode);
430 opb_ret = request_oplock_break(share_entry, dev, inode);
433 lock_share_entry(conn, dev, inode);
435 if(opb_ret == False) {
436 free((char *)old_shares);
437 DEBUG(0,("open_mode_check: FAILED when breaking oplock (%x) on file %s, \
438 dev = %x, inode = %.0f\n", old_shares[i].op_type, fname, (unsigned int)dev, (double)inode));
440 unix_ERR_class = ERRDOS;
441 unix_ERR_code = ERRbadshare;
446 *p_all_current_opens_are_level_II = False;
449 } else if (!LEVEL_II_OPLOCK_TYPE(share_entry->op_type)) {
450 *p_all_current_opens_are_level_II = False;
453 /* someone else has a share lock on it, check to see
456 if(check_share_mode(share_entry, deny_mode, fname, fcbopen, p_flags) == False) {
457 free((char *)old_shares);
465 free((char *)old_shares);
466 num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
467 oplock_contention_count++;
469 } while(broke_oplock);
472 free((char *)old_shares);
475 * Refuse to grant an oplock in case the contention limit is
476 * reached when going through the lock list multiple times.
479 if(oplock_contention_count >= lp_oplock_contention_limit(SNUM(conn))) {
480 *p_oplock_request = 0;
481 DEBUG(4,("open_mode_check: oplock contention = %d. Not granting oplock.\n",
482 oplock_contention_count ));
485 return num_share_modes;
488 /****************************************************************************
489 Open a file with a share mode.
490 ****************************************************************************/
492 files_struct *open_file_shared(connection_struct *conn,char *fname,int share_mode,int ofun,
493 mode_t mode,int oplock_request, int *Access,int *action)
497 int deny_mode = GET_DENY_MODE(share_mode);
498 BOOL allow_share_delete = GET_ALLOW_SHARE_DELETE(share_mode);
499 SMB_STRUCT_STAT sbuf;
500 BOOL file_existed = vfs_file_exist(conn, fname, &sbuf);
501 BOOL fcbopen = False;
504 int num_share_modes = 0;
505 BOOL all_current_opens_are_level_II = False;
506 BOOL fsp_open = False;
507 files_struct *fsp = NULL;
512 /* printers are handled completely differently. Most of the passed parameters are
514 *Access = DOS_OPEN_WRONLY;
515 *action = FILE_WAS_CREATED;
516 return print_fsp_open(conn, fname);
525 DEBUG(10,("open_file_shared: fname = %s, share_mode = %x, ofun = %x, mode = %o, oplock request = %d\n",
526 fname, share_mode, ofun, (int)mode, oplock_request ));
528 if (!check_name(fname,conn)) {
533 /* ignore any oplock requests if oplocks are disabled */
534 if (!lp_oplocks(SNUM(conn)) || global_client_failed_oplock_break) {
538 /* this is for OS/2 EAs - try and say we don't support them */
539 if (strstr(fname,".+,;=[].")) {
540 unix_ERR_class = ERRDOS;
541 /* OS/2 Workplace shell fix may be main code stream in a later release. */
542 #if 1 /* OS2_WPS_FIX - Recent versions of OS/2 need this. */
543 unix_ERR_code = ERRcannotopen;
544 #else /* OS2_WPS_FIX */
545 unix_ERR_code = ERROR_EAS_NOT_SUPPORTED;
546 #endif /* OS2_WPS_FIX */
548 DEBUG(5,("open_file_shared: OS/2 EA's are not supported.\n"));
553 if ((GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_FAIL) && file_existed) {
554 DEBUG(5,("open_file_shared: create new requested for file %s and file already exists.\n",
561 if (GET_FILE_CREATE_DISPOSITION(ofun) == FILE_CREATE_IF_NOT_EXIST)
564 if (GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_TRUNCATE)
567 if (GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_FAIL)
570 /* note that we ignore the append flag as
571 append does not mean the same thing under dos and unix */
573 switch (GET_OPEN_MODE(share_mode)) {
574 case DOS_OPEN_WRONLY:
590 if (GET_FILE_SYNC_OPENMODE(share_mode)) {
595 if (flags != O_RDONLY && file_existed &&
596 (!CAN_WRITE(conn) || IS_DOS_READONLY(dos_mode(conn,fname,&sbuf)))) {
598 DEBUG(5,("open_file_shared: read/write access requested for file %s on read only %s\n",
599 fname, !CAN_WRITE(conn) ? "share" : "file" ));
607 if (deny_mode > DENY_NONE && deny_mode!=DENY_FCB) {
608 DEBUG(2,("Invalid deny mode %d on file %s\n",deny_mode,fname));
618 lock_share_entry(conn, dev, inode);
620 num_share_modes = open_mode_check(conn, fname, dev, inode, share_mode,
621 &flags, &oplock_request, &all_current_opens_are_level_II);
622 if(num_share_modes == -1) {
623 unlock_share_entry(conn, dev, inode);
629 * We exit this block with the share entry *locked*.....
633 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o\n",
634 flags,flags2,(int)mode));
636 fsp_open = open_file(fsp,conn,fname,flags|(flags2&~(O_TRUNC)),mode);
638 if (!fsp_open && (flags == O_RDWR) && (errno != ENOENT) && fcbopen) {
639 if((fsp_open = open_file(fsp,conn,fname,O_RDONLY,mode)) == True)
645 unlock_share_entry(conn, dev, inode);
651 * Deal with the race condition where two smbd's detect the file doesn't
652 * exist and do the create at the same time. One of them will win and
653 * set a share mode, the other (ie. this one) should check if the
654 * requested share mode for this create is allowed.
659 lock_share_entry_fsp(fsp);
661 num_share_modes = open_mode_check(conn, fname, dev, inode, share_mode,
662 &flags, &oplock_request, &all_current_opens_are_level_II);
664 if(num_share_modes == -1) {
665 unlock_share_entry_fsp(fsp);
672 * We exit this block with the share entry *locked*.....
677 * At this point onwards, we can guarentee that the share entry
678 * is locked, whether we created the file or not, and that the
679 * deny mode is compatible with all current opens.
683 * If requested, truncate the file.
686 if ((flags2&O_TRUNC) && (truncate_unless_locked(conn,fsp) == -1)) {
687 unlock_share_entry_fsp(fsp);
695 open_mode = DOS_OPEN_RDONLY;
698 open_mode = DOS_OPEN_RDWR;
701 open_mode = DOS_OPEN_WRONLY;
705 fsp->share_mode = SET_DENY_MODE(deny_mode) |
706 SET_OPEN_MODE(open_mode) |
707 SET_ALLOW_SHARE_DELETE(allow_share_delete);
710 (*Access) = open_mode;
713 if (file_existed && !(flags2 & O_TRUNC))
714 *action = FILE_WAS_OPENED;
716 *action = FILE_WAS_CREATED;
717 if (file_existed && (flags2 & O_TRUNC))
718 *action = FILE_WAS_OVERWRITTEN;
722 * Setup the oplock info in both the shared memory and
726 if(oplock_request && (num_share_modes == 0) &&
727 !IS_VETO_OPLOCK_PATH(conn,fname) && set_file_oplock(fsp, oplock_request) ) {
728 port = global_oplock_port;
729 } else if (oplock_request && all_current_opens_are_level_II) {
730 port = global_oplock_port;
731 oplock_request = LEVEL_II_OPLOCK;
732 set_file_oplock(fsp, oplock_request);
738 set_share_mode(fsp, port, oplock_request);
740 unlock_share_entry_fsp(fsp);
742 conn->num_files_open++;
747 /****************************************************************************
748 Open a file for permissions read only. Return a pseudo file entry
749 with the 'stat_open' flag set
750 ****************************************************************************/
752 files_struct *open_file_stat(connection_struct *conn,
753 char *fname, int smb_ofun, SMB_STRUCT_STAT *pst, int *action)
755 extern struct current_user current_user;
756 files_struct *fsp = file_new();
761 if(conn->vfs_ops.stat(dos_to_unix(fname, False), pst) < 0) {
762 DEBUG(0,("open_file_stat: unable to stat name = %s. Error was %s\n",
763 fname, strerror(errno) ));
768 if(S_ISDIR(pst->st_mode)) {
769 DEBUG(0,("open_file_stat: %s is a directory !\n", fname ));
774 *action = FILE_WAS_OPENED;
776 DEBUG(5,("open_file_stat: opening file %s as a stat entry\n", fname));
779 * Setup the files_struct for it.
784 GetTimeOfDay(&fsp->open_time);
785 fsp->vuid = current_user.vuid;
788 fsp->can_lock = False;
789 fsp->can_read = False;
790 fsp->can_write = False;
792 fsp->print_file = False;
793 fsp->modified = False;
794 fsp->oplock_type = NO_OPLOCK;
795 fsp->sent_oplock_break = NO_BREAK_SENT;
796 fsp->is_directory = False;
797 fsp->stat_open = True;
798 fsp->directory_delete_on_close = False;
801 * Note that the file name here is the *untranslated* name
802 * ie. it is still in the DOS codepage sent from the client.
803 * All use of this filename will pass though the sys_xxxx
804 * functions which will do the dos_to_unix translation before
805 * mapping into a UNIX filename. JRA.
807 string_set(&fsp->fsp_name,fname);
808 fsp->wbmpx_ptr = NULL;
809 fsp->wcp = NULL; /* Write cache pointer. */
811 conn->num_files_open++;
816 /****************************************************************************
817 Open a directory from an NT SMB call.
818 ****************************************************************************/
820 files_struct *open_directory(connection_struct *conn,
821 char *fname, int smb_ofun, mode_t unixmode, int *action)
823 extern struct current_user current_user;
825 BOOL got_stat = False;
826 files_struct *fsp = file_new();
831 if(conn->vfs_ops.stat(dos_to_unix(fname, False), &st) == 0) {
835 if (got_stat && (GET_FILE_OPEN_DISPOSITION(smb_ofun) == FILE_EXISTS_FAIL)) {
837 errno = EEXIST; /* Setup so correct error is returned to client. */
841 if (GET_FILE_CREATE_DISPOSITION(smb_ofun) == FILE_CREATE_IF_NOT_EXIST) {
845 if(!S_ISDIR(st.st_mode)) {
846 DEBUG(0,("open_directory: %s is not a directory !\n", fname ));
851 *action = FILE_WAS_OPENED;
856 * Try and create the directory.
859 if(!CAN_WRITE(conn)) {
860 DEBUG(2,("open_directory: failing create on read-only share\n"));
866 if(conn->vfs_ops.mkdir(dos_to_unix(fname, False),
867 unix_mode(conn,aDIR, fname)) < 0) {
868 DEBUG(0,("open_directory: unable to create %s. Error was %s\n",
869 fname, strerror(errno) ));
873 *action = FILE_WAS_CREATED;
879 * Don't create - just check that it *was* a directory.
883 DEBUG(0,("open_directory: unable to stat name = %s. Error was %s\n",
884 fname, strerror(errno) ));
889 if(!S_ISDIR(st.st_mode)) {
890 DEBUG(0,("open_directory: %s is not a directory !\n", fname ));
895 *action = FILE_WAS_OPENED;
898 DEBUG(5,("open_directory: opening directory %s\n",
902 * Setup the files_struct for it.
907 GetTimeOfDay(&fsp->open_time);
908 fsp->vuid = current_user.vuid;
911 fsp->can_lock = True;
912 fsp->can_read = False;
913 fsp->can_write = False;
915 fsp->print_file = False;
916 fsp->modified = False;
917 fsp->oplock_type = NO_OPLOCK;
918 fsp->sent_oplock_break = NO_BREAK_SENT;
919 fsp->is_directory = True;
920 fsp->directory_delete_on_close = False;
923 * Note that the file name here is the *untranslated* name
924 * ie. it is still in the DOS codepage sent from the client.
925 * All use of this filename will pass though the sys_xxxx
926 * functions which will do the dos_to_unix translation before
927 * mapping into a UNIX filename. JRA.
929 string_set(&fsp->fsp_name,fname);
930 fsp->wbmpx_ptr = NULL;
932 conn->num_files_open++;
937 /*******************************************************************
938 Check if the share mode on a file allows it to be deleted or unlinked.
939 Return True if sharing doesn't prevent the operation.
940 ********************************************************************/
942 BOOL check_file_sharing(connection_struct *conn,char *fname, BOOL rename_op)
946 share_mode_entry *old_shares = 0;
948 SMB_STRUCT_STAT sbuf;
949 pid_t pid = sys_getpid();
953 if (conn->vfs_ops.stat(dos_to_unix(fname,False),&sbuf) == -1)
959 lock_share_entry(conn, dev, inode);
960 num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
963 * Check if the share modes will give us access.
966 if(num_share_modes != 0)
973 broke_oplock = False;
974 for(i = 0; i < num_share_modes; i++)
976 share_mode_entry *share_entry = &old_shares[i];
979 * Break oplocks before checking share modes. See comment in
980 * open_file_shared for details.
981 * Check if someone has an oplock on this file. If so we must
982 * break it before continuing.
984 if(BATCH_OPLOCK_TYPE(share_entry->op_type))
989 /* JRA. Try removing this code to see if the new oplock changes
990 fix the problem. I'm dubious, but Andrew is recommending we
995 * It appears that the NT redirector may have a bug, in that
996 * it tries to do an SMBmv on a file that it has open with a
997 * batch oplock, and then fails to respond to the oplock break
998 * request. This only seems to occur when the client is doing an
999 * SMBmv to the smbd it is using - thus we try and detect this
1000 * condition by checking if the file being moved is open and oplocked by
1001 * this smbd process, and then not sending the oplock break in this
1002 * special case. If the file was open with a deny mode that
1003 * prevents the move the SMBmv will fail anyway with a share
1004 * violation error. JRA.
1006 if(rename_op && (share_entry->pid == pid))
1009 DEBUG(0,("check_file_sharing: NT redirector workaround - rename attempted on \
1010 batch oplocked file %s, dev = %x, inode = %.0f\n", fname, (unsigned int)dev, (double)inode));
1013 * This next line is a test that allows the deny-mode
1014 * processing to be skipped. This seems to be needed as
1015 * NT insists on the rename succeeding (in Office 9x no less !).
1016 * This should be removed as soon as (a) MS fix the redirector
1017 * bug or (b) NT SMB support in Samba makes NT not issue the
1018 * call (as is my fervent hope). JRA.
1026 DEBUG(5,("check_file_sharing: breaking oplock (%x) on file %s, \
1027 dev = %x, inode = %.0f\n", share_entry->op_type, fname, (unsigned int)dev, (double)inode));
1029 /* Oplock break.... */
1030 unlock_share_entry(conn, dev, inode);
1031 if(request_oplock_break(share_entry, dev, inode) == False)
1033 free((char *)old_shares);
1035 DEBUG(0,("check_file_sharing: FAILED when breaking oplock (%x) on file %s, \
1036 dev = %x, inode = %.0f\n", old_shares[i].op_type, fname, (unsigned int)dev, (double)inode));
1040 lock_share_entry(conn, dev, inode);
1041 broke_oplock = True;
1047 * If this is a delete request and ALLOW_SHARE_DELETE is set then allow
1048 * this to proceed. This takes precedence over share modes.
1051 if(!rename_op && GET_ALLOW_SHARE_DELETE(share_entry->share_mode))
1055 * Someone else has a share lock on it, check to see
1059 if ((GET_DENY_MODE(share_entry->share_mode) != DENY_DOS) ||
1060 (share_entry->pid != pid))
1067 free((char *)old_shares);
1068 num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
1070 } while(broke_oplock);
1073 /* XXXX exactly what share mode combinations should be allowed for
1074 deleting/renaming? */
1076 * If we got here then either there were no share modes or
1077 * all share modes were DENY_DOS and the pid == getpid() or
1078 * delete access was requested and all share modes had the
1079 * ALLOW_SHARE_DELETE bit set (takes precedence over other
1087 unlock_share_entry(conn, dev, inode);
1088 if(old_shares != NULL)
1089 free((char *)old_shares);