extern pstring sesssetup_user;
extern uint16 global_oplock_port;
-
+extern BOOL global_client_failed_oplock_break;
/****************************************************************************
fd support routines - attempt to do a dos_open
****************************************************************************/
+
static int fd_attempt_open(char *fname, int flags, mode_t mode)
{
int fd = dos_open(fname,flags,mode);
Cache a uid_t currently with this file open. This is an optimization only
used when multiple sessionsetup's have been done to one smbd.
****************************************************************************/
+
void fd_add_to_uid_cache(file_fd_struct *fd_ptr, uid_t u)
{
if(fd_ptr->uid_cache_count >= sizeof(fd_ptr->uid_users_cache)/sizeof(uid_t))
Remove a uid_t that currently has this file open. This is an optimization only
used when multiple sessionsetup's have been done to one smbd.
****************************************************************************/
+
static void fd_remove_from_uid_cache(file_fd_struct *fd_ptr, uid_t u)
{
int i;
Check if a uid_t that currently has this file open is present. This is an
optimization only used when multiple sessionsetup's have been done to one smbd.
****************************************************************************/
+
static BOOL fd_is_in_uid_cache(file_fd_struct *fd_ptr, uid_t u)
{
int i;
return False;
}
-
/****************************************************************************
fd support routines - attempt to re-open an already open fd as O_RDWR.
Save the already open fd (we cannot close due to POSIX file locking braindamage.
****************************************************************************/
+
static void fd_attempt_reopen(char *fname, mode_t mode, file_fd_struct *fd_ptr)
{
int fd = dos_open( fname, O_RDWR, mode);
fd support routines - attempt to close the file referenced by this fd.
Decrements the ref_count and returns it.
****************************************************************************/
-uint16 fd_attempt_close(file_fd_struct *fd_ptr)
+
+uint16 fd_attempt_close(file_fd_struct *fd_ptr, int *err_ret)
{
extern struct current_user current_user;
uint16 ret_ref = fd_ptr->ref_count;
+ *err_ret = 0;
+
DEBUG(3,("fd_attempt_close fd = %d, dev = %x, inode = %.0f, open_flags = %d, ref_count = %d.\n",
fd_ptr->fd, (unsigned int)fd_ptr->dev, (double)fd_ptr->inode,
fd_ptr->real_open_flags,
ret_ref = fd_ptr->ref_count;
if(fd_ptr->ref_count == 0) {
- if(fd_ptr->fd != -1)
- close(fd_ptr->fd);
- if(fd_ptr->fd_readonly != -1)
- close(fd_ptr->fd_readonly);
- if(fd_ptr->fd_writeonly != -1)
- close(fd_ptr->fd_writeonly);
+
+ if(fd_ptr->fd != -1) {
+ if(close(fd_ptr->fd) < 0)
+ *err_ret = errno;
+ }
+
+ if(fd_ptr->fd_readonly != -1) {
+ if(close(fd_ptr->fd_readonly) < 0) {
+ if(*err_ret == 0)
+ *err_ret = errno;
+ }
+ }
+
+ if(fd_ptr->fd_writeonly != -1) {
+ if( close(fd_ptr->fd_writeonly) < 0) {
+ if(*err_ret == 0)
+ *err_ret = errno;
+ }
+ }
+
/*
* Delete this fd_ptr.
*/
fd_remove_from_uid_cache(fd_ptr, (uid_t)current_user.uid);
}
- return ret_ref;
+ return ret_ref;
}
/****************************************************************************
fork and then attempt to open the file, and return success or failure
via an exit code.
****************************************************************************/
+
static BOOL check_access_allowed_for_current_user( char *fname, int accmode )
{
pid_t child_pid;
+ /*
+ * We need to temporarily stop CatchChild from eating
+ * SIGCLD signals as it also eats the exit status code. JRA.
+ */
+
+ CatchChildLeaveStatus();
+
if((child_pid = fork()) < 0) {
DEBUG(0,("check_access_allowed_for_current_user: fork failed.\n"));
+ CatchChild();
return False;
}
*/
pid_t wpid;
int status_code;
- if ((wpid = sys_waitpid(child_pid, &status_code, 0)) < 0) {
- DEBUG(0,("check_access_allowed_for_current_user: The process is no longer waiting!\n"));
+
+ while ((wpid = sys_waitpid(child_pid, &status_code, 0)) < 0) {
+ if(errno == EINTR) {
+ errno = 0;
+ continue;
+ }
+ DEBUG(0,("check_access_allowed_for_current_user: The process \
+is no longer waiting ! Error = %s\n", strerror(errno) ));
+ CatchChild();
return(False);
}
+ /*
+ * Go back to ignoring children.
+ */
+ CatchChild();
+
if (child_pid != wpid) {
DEBUG(0,("check_access_allowed_for_current_user: We were waiting for the wrong process ID\n"));
return(False);
/****************************************************************************
check a filename for the pipe string
****************************************************************************/
+
static void check_for_pipe(char *fname)
{
/* special case of pipe opens */
char s[10];
- StrnCpy(s,fname,9);
+ StrnCpy(s,fname,sizeof(s)-1);
strlower(s);
if (strstr(s,"pipe/")) {
DEBUG(3,("Rejecting named pipe open for %s\n",fname));
/****************************************************************************
open a file
****************************************************************************/
+
static void open_file(files_struct *fsp,connection_struct *conn,
char *fname1,int flags,mode_t mode, SMB_STRUCT_STAT *sbuf)
{
fsp->open = False;
fsp->fd_ptr = 0;
- fsp->granted_oplock = False;
+ fsp->oplock_type = NO_OPLOCK;
errno = EPERM;
pstrcpy(fname,fname1);
* JRA.
*/
- if (conn->read_only && !conn->printer) {
+ if (!CAN_WRITE(conn) && !conn->printer) {
/* It's a read-only share - fail if we wanted to write. */
if(accmode != O_RDONLY) {
DEBUG(3,("Permission denied opening %s\n",fname));
/* this handles a bug in Win95 - it doesn't say to create the file when it
should */
if (conn->printer) {
- flags |= O_CREAT;
+ flags |= (O_CREAT|O_EXCL);
}
/*
pstrcpy(dname,fname);
p = strrchr(dname,'/');
if (p) *p = 0;
- if (sys_disk_free(dname,&dum1,&dum2,&dum3) < (SMB_BIG_UINT)lp_minprintspace(SNUM(conn))) {
- if(fd_attempt_close(fd_ptr) == 0)
+ if (sys_disk_free(dname,False,&dum1,&dum2,&dum3) < (SMB_BIG_UINT)lp_minprintspace(SNUM(conn))) {
+ int err;
+ if(fd_attempt_close(fd_ptr, &err) == 0)
dos_unlink(fname);
fsp->fd_ptr = 0;
errno = ENOSPC;
if (fd_ptr->fd < 0)
{
+ int err;
DEBUG(3,("Error opening file %s (%s) (flags=%d)\n",
fname,strerror(errno),flags));
/* Ensure the ref_count is decremented. */
- fd_attempt_close(fd_ptr);
+ fd_attempt_close(fd_ptr,&err);
check_for_pipe(fname);
return;
}
if(sbuf == 0) {
/* Do the fstat */
if(sys_fstat(fd_ptr->fd, &statbuf) == -1) {
+ int err;
/* Error - backout !! */
DEBUG(3,("Error doing fstat on fd %d, file %s (%s)\n",
fd_ptr->fd, fname,strerror(errno)));
/* Ensure the ref_count is decremented. */
- fd_attempt_close(fd_ptr);
+ fd_attempt_close(fd_ptr,&err);
return;
}
sbuf = &statbuf;
fsp->size = 0;
fsp->pos = -1;
fsp->open = True;
- fsp->mmap_ptr = NULL;
- fsp->mmap_size = 0;
fsp->can_lock = True;
fsp->can_read = ((flags & O_WRONLY)==0);
fsp->can_write = ((flags & (O_WRONLY|O_RDWR))!=0);
fsp->share_mode = 0;
fsp->print_file = conn->printer;
fsp->modified = False;
- fsp->granted_oplock = False;
- fsp->sent_oplock_break = False;
+ fsp->oplock_type = NO_OPLOCK;
+ fsp->sent_oplock_break = NO_BREAK_SENT;
fsp->is_directory = False;
+ fsp->stat_open = False;
+ fsp->directory_delete_on_close = False;
fsp->conn = conn;
/*
* Note that the file name here is the *untranslated* name
*/
string_set(&fsp->fsp_name,fname);
fsp->wbmpx_ptr = NULL;
+ fsp->wcp = NULL; /* Write cache pointer. */
/*
* If the printer is marked as postscript output a leading
*/
if (fsp->print_file && lp_postscript(SNUM(conn)) && fsp->can_write) {
DEBUG(3,("Writing postscript line\n"));
- write_file(fsp,"%!\n",3);
+ write_file(fsp,"%!\n",-1,3);
}
DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
}
}
-/****************************************************************************
- If it's a read-only file, and we were compiled with mmap enabled,
- try and mmap the file. This is split out from open_file() above
- as mmap'ing the file can cause the kernel reference count to
- be incremented, which can cause kernel oplocks to be refused.
- Splitting this call off allows the kernel oplock to be granted, then
- the file mmap'ed.
-****************************************************************************/
-
-static void mmap_open_file(files_struct *fsp)
-{
-#if WITH_MMAP
- /* mmap it if read-only */
- if (!fsp->can_write) {
- fsp->mmap_size = file_size(fsp->fsp_name);
- if (fsp->mmap_size < MAX_MMAP_SIZE) {
- fsp->mmap_ptr = (char *)mmap(NULL,fsp->mmap_size,
- PROT_READ,MAP_SHARED,fsp->fd_ptr->fd,0);
-
- if (fsp->mmap_ptr == (char *)-1 || !fsp->mmap_ptr) {
- DEBUG(3,("Failed to mmap() %s - %s\n",
- fsp->fsp_name,strerror(errno)));
- fsp->mmap_ptr = NULL;
- }
- }
- }
-#endif
-}
-
/****************************************************************************
C. Hoch 11/22/95
Helper for open_file_shared.
Truncate a file after checking locking; close file if locked.
**************************************************************************/
+
static void truncate_unless_locked(files_struct *fsp, connection_struct *conn, int token,
BOOL *share_locked)
{
if (fsp->can_write){
- SMB_OFF_T mask = ((SMB_OFF_T)0xC) << (SMB_OFF_T_BITS-4);
+ SMB_OFF_T mask2 = ((SMB_OFF_T)0x3) << (SMB_OFF_T_BITS-4);
+ SMB_OFF_T mask = (mask2<<2);
if (is_locked(fsp,conn,~mask,0,F_WRLCK)){
/* If share modes are in force for this connection we
}
}
-
enum {AFAIL,AREAD,AWRITE,AALL};
/*******************************************************************
reproduce the share mode access table
********************************************************************/
+
static int access_table(int new_deny,int old_deny,int old_mode,
- int share_pid,char *fname)
+ pid_t share_pid,char *fname)
{
if (new_deny == DENY_ALL || old_deny == DENY_ALL) return(AFAIL);
if (new_deny == DENY_DOS || old_deny == DENY_DOS) {
- int pid = getpid();
+ pid_t pid = getpid();
if (old_deny == new_deny && share_pid == pid)
return(AALL);
return(AFAIL);
}
-
/****************************************************************************
check if we can open a file with a share mode
****************************************************************************/
+
static int check_share_mode( share_mode_entry *share, int deny_mode,
char *fname,
BOOL fcbopen, int *flags)
{
DEBUG(2,("Share violation on file (%d,%d,%d,%d,%s,fcbopen = %d, flags = %d) = %d\n",
deny_mode,old_deny_mode,old_open_mode,
- share->pid,fname, fcbopen, *flags, access_allowed));
+ (int)share->pid,fname, fcbopen, *flags, access_allowed));
unix_ERR_class = ERRDOS;
unix_ERR_code = ERRbadshare;
return True;
}
-
/****************************************************************************
open a file with a share mode
****************************************************************************/
int deny_mode = GET_DENY_MODE(share_mode);
BOOL allow_share_delete = GET_ALLOW_SHARE_DELETE(share_mode);
SMB_STRUCT_STAT sbuf;
- BOOL file_existed = file_exist(fname,&sbuf);
+ BOOL file_existed = dos_file_exist(fname,&sbuf);
BOOL share_locked = False;
BOOL fcbopen = False;
- int token;
+ int token = 0;
SMB_DEV_T dev = 0;
SMB_INO_T inode = 0;
int num_share_modes = 0;
-
+ int oplock_contention_count = 0;
+ BOOL all_current_opens_are_level_II = False;
fsp->open = False;
fsp->fd_ptr = 0;
DEBUG(10,("open_file_shared: fname = %s, share_mode = %x, ofun = %x, mode = %o, oplock request = %d\n",
fname, share_mode, ofun, (int)mode, oplock_request ));
+
+ /* ignore any oplock requests if oplocks are disabled */
+ if (!lp_oplocks(SNUM(conn)) || global_client_failed_oplock_break) {
+ oplock_request = 0;
+ }
+
/* this is for OS/2 EAs - try and say we don't support them */
if (strstr(fname,".+,;=[]."))
{
if (GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_TRUNCATE)
flags2 |= O_TRUNC;
+ if (GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_FAIL)
+ flags2 |= O_EXCL;
+
/* note that we ignore the append flag as
append does not mean the same thing under dos and unix */
{
broke_oplock = False;
+ all_current_opens_are_level_II = True;
+
for(i = 0; i < num_share_modes; i++)
{
share_mode_entry *share_entry = &old_shares[i];
* Check if someone has an oplock on this file. If so we must break
* it before continuing.
*/
- if(share_entry->op_type & (EXCLUSIVE_OPLOCK|BATCH_OPLOCK))
+ if((oplock_request && EXCLUSIVE_OPLOCK_TYPE(share_entry->op_type)) ||
+ (!oplock_request && (share_entry->op_type != NO_OPLOCK)))
{
DEBUG(5,("open_file_shared: breaking oplock (%x) on file %s, \
}
lock_share_entry(conn, dev, inode, &token);
broke_oplock = True;
+ all_current_opens_are_level_II = False;
break;
+ } else if (!LEVEL_II_OPLOCK_TYPE(share_entry->op_type)) {
+ all_current_opens_are_level_II = False;
}
/* someone else has a share lock on it, check to see
{
free((char *)old_shares);
num_share_modes = get_share_modes(conn, token, dev, inode, &old_shares);
+ oplock_contention_count++;
}
} while(broke_oplock);
}
free((char *)old_shares);
}
+ /*
+ * Refuse to grant an oplock in case the contention limit is
+ * reached when going through the lock list multiple times.
+ */
+
+ if(oplock_contention_count >= lp_oplock_contention_limit(SNUM(conn)))
+ {
+ oplock_request = 0;
+ DEBUG(4,("open_file_shared: oplock contention = %d. Not granting oplock.\n",
+ oplock_contention_count ));
+ }
+
DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o\n",
flags,flags2,(int)mode));
{
uint16 port = 0;
- /* JRA. Currently this only services Exlcusive and batch
- oplocks (no other opens on this file). This needs to
- be extended to level II oplocks (multiple reader
- oplocks). */
+ /*
+ * Setup the oplock info in both the shared memory and
+ * file structs.
+ */
- if((oplock_request) && (num_share_modes == 0) && lp_oplocks(SNUM(conn)) &&
- !IS_VETO_OPLOCK_PATH(conn,fname) && set_file_oplock(fsp) )
- {
+ if(oplock_request && (num_share_modes == 0) &&
+ !IS_VETO_OPLOCK_PATH(conn,fname) && set_file_oplock(fsp, oplock_request) ) {
port = global_oplock_port;
- }
- else
- {
+ } else if (oplock_request && all_current_opens_are_level_II) {
+ port = global_oplock_port;
+ oplock_request = LEVEL_II_OPLOCK;
+ set_file_oplock(fsp, oplock_request);
+ } else {
port = 0;
oplock_request = 0;
}
if ((flags2&O_TRUNC) && file_existed)
truncate_unless_locked(fsp,conn,token,&share_locked);
-
- /*
- * Attempt to mmap a read only file.
- * Moved until after a kernel oplock may
- * be granted due to reference count issues. JRA.
- */
- mmap_open_file(fsp);
}
if (share_locked && lp_share_modes(SNUM(conn)))
unlock_share_entry( conn, dev, inode, token);
}
+/****************************************************************************
+ Open a file for permissions read only. Return a pseudo file entry
+ with the 'stat_open' flag set and a fd_ptr of NULL.
+****************************************************************************/
+
+int open_file_stat(files_struct *fsp,connection_struct *conn,
+ char *fname, int smb_ofun, SMB_STRUCT_STAT *pst, int *action)
+{
+ extern struct current_user current_user;
+
+ if(dos_stat(fname, pst) < 0) {
+ DEBUG(0,("open_file_stat: unable to stat name = %s. Error was %s\n",
+ fname, strerror(errno) ));
+ return -1;
+ }
+
+ if(S_ISDIR(pst->st_mode)) {
+ DEBUG(0,("open_file_stat: %s is a directory !\n", fname ));
+ return -1;
+ }
+
+ *action = FILE_WAS_OPENED;
+
+ DEBUG(5,("open_file_stat: opening file %s as a stat entry\n", fname));
+
+ /*
+ * Setup the files_struct for it.
+ */
+
+ fsp->fd_ptr = NULL;
+ conn->num_files_open++;
+ fsp->mode = 0;
+ GetTimeOfDay(&fsp->open_time);
+ fsp->vuid = current_user.vuid;
+ fsp->size = 0;
+ fsp->pos = -1;
+ fsp->open = True;
+ fsp->can_lock = False;
+ fsp->can_read = False;
+ fsp->can_write = False;
+ fsp->share_mode = 0;
+ fsp->print_file = False;
+ fsp->modified = False;
+ fsp->oplock_type = NO_OPLOCK;
+ fsp->sent_oplock_break = NO_BREAK_SENT;
+ fsp->is_directory = False;
+ fsp->stat_open = True;
+ fsp->directory_delete_on_close = False;
+ fsp->conn = conn;
+ /*
+ * Note that the file name here is the *untranslated* name
+ * ie. it is still in the DOS codepage sent from the client.
+ * All use of this filename will pass though the sys_xxxx
+ * functions which will do the dos_to_unix translation before
+ * mapping into a UNIX filename. JRA.
+ */
+ string_set(&fsp->fsp_name,fname);
+ fsp->wbmpx_ptr = NULL;
+ fsp->wcp = NULL; /* Write cache pointer. */
+
+ return 0;
+}
+
/****************************************************************************
Open a directory from an NT SMB call.
****************************************************************************/
{
extern struct current_user current_user;
SMB_STRUCT_STAT st;
+ BOOL got_stat = False;
- if (smb_ofun & 0x10) {
- /*
- * Create the directory.
- */
+ if(dos_stat(fname, &st) == 0) {
+ got_stat = True;
+ }
- if(dos_mkdir(fname, unix_mode(conn,aDIR)) < 0) {
- DEBUG(0,("open_directory: unable to create %s. Error was %s\n",
- fname, strerror(errno) ));
- return -1;
- }
+ if (got_stat && (GET_FILE_OPEN_DISPOSITION(smb_ofun) == FILE_EXISTS_FAIL)) {
+ errno = EEXIST; /* Setup so correct error is returned to client. */
+ return -1;
+ }
+
+ if (GET_FILE_CREATE_DISPOSITION(smb_ofun) == FILE_CREATE_IF_NOT_EXIST) {
+
+ if (got_stat) {
+
+ if(!S_ISDIR(st.st_mode)) {
+ DEBUG(0,("open_directory: %s is not a directory !\n", fname ));
+ errno = EACCES;
+ return -1;
+ }
+ *action = FILE_WAS_OPENED;
+
+ } else {
+
+ /*
+ * Try and create the directory.
+ */
+
+ if(!CAN_WRITE(conn)) {
+ DEBUG(2,("open_directory: failing create on read-only share\n"));
+ errno = EACCES;
+ return -1;
+ }
- *action = FILE_WAS_CREATED;
+ if(dos_mkdir(fname, unix_mode(conn,aDIR)) < 0) {
+ DEBUG(0,("open_directory: unable to create %s. Error was %s\n",
+ fname, strerror(errno) ));
+ return -1;
+ }
+ *action = FILE_WAS_CREATED;
+
+ }
} else {
+
/*
- * Check that it *was* a directory.
+ * Don't create - just check that it *was* a directory.
*/
- if(dos_stat(fname, &st) < 0) {
+ if(!got_stat) {
DEBUG(0,("open_directory: unable to stat name = %s. Error was %s\n",
fname, strerror(errno) ));
return -1;
DEBUG(0,("open_directory: %s is not a directory !\n", fname ));
return -1;
}
+
*action = FILE_WAS_OPENED;
}
fsp->size = 0;
fsp->pos = -1;
fsp->open = True;
- fsp->mmap_ptr = NULL;
- fsp->mmap_size = 0;
fsp->can_lock = True;
fsp->can_read = False;
fsp->can_write = False;
fsp->share_mode = 0;
fsp->print_file = False;
fsp->modified = False;
- fsp->granted_oplock = False;
- fsp->sent_oplock_break = False;
+ fsp->oplock_type = NO_OPLOCK;
+ fsp->sent_oplock_break = NO_BREAK_SENT;
fsp->is_directory = True;
+ fsp->directory_delete_on_close = False;
fsp->conn = conn;
/*
* Note that the file name here is the *untranslated* name
return 0;
}
-
/*******************************************************************
-check if the share mode on a file allows it to be deleted or unlinked
-return True if sharing doesn't prevent the operation
+ Check if the share mode on a file allows it to be deleted or unlinked.
+ Return True if sharing doesn't prevent the operation.
********************************************************************/
BOOL check_file_sharing(connection_struct *conn,char *fname, BOOL rename_op)
int num_share_modes;
SMB_STRUCT_STAT sbuf;
int token;
- int pid = getpid();
+ pid_t pid = getpid();
SMB_DEV_T dev;
SMB_INO_T inode;
* Check if someone has an oplock on this file. If so we must
* break it before continuing.
*/
- if(share_entry->op_type & BATCH_OPLOCK)
+ if(BATCH_OPLOCK_TYPE(share_entry->op_type))
{
+#if 0
+
+/* JRA. Try removing this code to see if the new oplock changes
+ fix the problem. I'm dubious, but Andrew is recommending we
+ try this....
+*/
+
/*
* It appears that the NT redirector may have a bug, in that
* it tries to do an SMBmv on a file that it has open with a
continue;
}
else
+#endif /* 0 */
{
DEBUG(5,("check_file_sharing: breaking oplock (%x) on file %s, \
git.samba.org / kai / samba.git / blobdiff