static void blocking_lock_reply_error(blocking_lock_record *blr, NTSTATUS status)
{
switch(blr->com_type) {
case SMBlock:
case SMBlockread:
generic_blocking_lock_error(blr, status);
break;
case SMBlockingX:
reply_lockingX_error(blr, status);
break;
default:
DEBUG(0,("blocking_lock_reply_error: PANIC - unknown type on blocking lock queue - exiting.!\n"));
exit_server("PANIC - unknown type on blocking lock queue");
}
}
static void reply_lockingX_error(struct blocking_lock_record *blr, NTSTATUS status)
{
files_struct *fsp = blr->fsp;
uint16 num_ulocks = SVAL(blr->req->vwv+6, 0);
uint64_t count = (uint64_t)0, offset = (uint64_t) 0;
uint32 lock_pid;
unsigned char locktype = CVAL(blr->req->vwv+3, 0);
bool large_file_format = (locktype & LOCKING_ANDX_LARGE_FILES);
uint8_t *data;
int i;
data = (uint8_t *)blr->req->buf
+ ((large_file_format ? 20 : 10)*num_ulocks);
/*
* Data now points at the beginning of the list
* of smb_lkrng structs.
*/
/*
* Ensure we don't do a remove on the lock that just failed,
* as under POSIX rules, if we have a lock already there, we
* will delete it (and we shouldn't) .....
*/
for(i = blr->lock_num - 1; i >= 0; i--) {
bool err;
lock_pid = get_lock_pid( data, i, large_file_format);
count = get_lock_count( data, i, large_file_format);
offset = get_lock_offset( data, i, large_file_format, &err);
/*
* We know err cannot be set as if it was the lock
* request would never have been queued. JRA.
*/
do_unlock(smbd_messaging_context(),
fsp,
lock_pid,
count,
offset,
WINDOWS_LOCK);
}
generic_blocking_lock_error(blr, status);
}
static void reply_lockingX_error(blocking_lock_record *blr, NTSTATUS status)
{
char *inbuf = blr->inbuf;
files_struct *fsp = blr->fsp;
connection_struct *conn = conn_find(SVAL(inbuf,smb_tid));
uint16 num_ulocks = SVAL(inbuf,smb_vwv6);
SMB_BIG_UINT count = (SMB_BIG_UINT)0, offset = (SMB_BIG_UINT) 0;
uint16 lock_pid;
unsigned char locktype = CVAL(inbuf,smb_vwv3);
BOOL large_file_format = (locktype & LOCKING_ANDX_LARGE_FILES);
char *data;
int i;
data = smb_buf(inbuf) + ((large_file_format ? 20 : 10)*num_ulocks);
/*
* Data now points at the beginning of the list
* of smb_lkrng structs.
*/
/*
* Ensure we don't do a remove on the lock that just failed,
* as under POSIX rules, if we have a lock already there, we
* will delete it (and we shouldn't) .....
*/
for(i = blr->lock_num - 1; i >= 0; i--) {
BOOL err;
lock_pid = get_lock_pid( data, i, large_file_format);
count = get_lock_count( data, i, large_file_format);
offset = get_lock_offset( data, i, large_file_format, &err);
/*
* We know err cannot be set as if it was the lock
* request would never have been queued. JRA.
*/
do_unlock(fsp,conn,lock_pid,count,offset);
}
generic_blocking_lock_error(blr, status);
}
static void blocking_lock_reply_error(struct blocking_lock_record *blr, NTSTATUS status)
{
DEBUG(10, ("Replying with error=%s. BLR = %p\n", nt_errstr(status), blr));
switch(blr->req->cmd) {
case SMBlockingX:
/*
* This code can be called during the rundown of a
* file after it was already closed. In that case,
* blr->fsp==NULL and we do not need to undo any
* locks, they are already gone.
*/
if (blr->fsp != NULL) {
undo_locks_obtained(blr);
}
generic_blocking_lock_error(blr, status);
break;
case SMBtrans2:
case SMBtranss2:
reply_nterror(blr->req, status);
/*
* construct_reply_common has done us the favor to pre-fill
* the command field with SMBtranss2 which is wrong :-)
*/
SCVAL(blr->req->outbuf,smb_com,SMBtrans2);
if (!srv_send_smb(blr->req->sconn,
(char *)blr->req->outbuf,
true, blr->req->seqnum+1,
IS_CONN_ENCRYPTED(blr->fsp->conn),
NULL)) {
exit_server_cleanly("blocking_lock_reply_error: "
"srv_send_smb failed.");
}
TALLOC_FREE(blr->req->outbuf);
break;
default:
DEBUG(0,("blocking_lock_reply_error: PANIC - unknown type on blocking lock queue - exiting.!\n"));
exit_server("PANIC - unknown type on blocking lock queue");
}
}
static BOOL process_lockread(blocking_lock_record *blr)
{
char *outbuf = OutBuffer;
char *inbuf = blr->inbuf;
ssize_t nread = -1;
char *data, *p;
int outsize = 0;
SMB_BIG_UINT startpos;
size_t numtoread;
NTSTATUS status;
connection_struct *conn = conn_find(SVAL(inbuf,smb_tid));
files_struct *fsp = blr->fsp;
BOOL my_lock_ctx = False;
numtoread = SVAL(inbuf,smb_vwv1);
startpos = (SMB_BIG_UINT)IVAL(inbuf,smb_vwv2);
numtoread = MIN(BUFFER_SIZE-outsize,numtoread);
data = smb_buf(outbuf) + 3;
status = do_lock_spin( fsp, conn, SVAL(inbuf,smb_pid), (SMB_BIG_UINT)numtoread, startpos, READ_LOCK, &my_lock_ctx);
if (NT_STATUS_V(status)) {
if (!NT_STATUS_EQUAL(status,NT_STATUS_LOCK_NOT_GRANTED) &&
!NT_STATUS_EQUAL(status,NT_STATUS_FILE_LOCK_CONFLICT)) {
/*
* We have other than a "can't get lock"
* error. Send an error.
* Return True so we get dequeued.
*/
generic_blocking_lock_error(blr, status);
return True;
}
/*
* Still waiting for lock....
*/
DEBUG(10,("process_lockread: failed to get lock for file = %s. Still waiting....\n",
fsp->fsp_name));
return False;
}
nread = read_file(fsp,data,startpos,numtoread);
if (nread < 0) {
generic_blocking_lock_error(blr,NT_STATUS_ACCESS_DENIED);
return True;
}
construct_reply_common(inbuf, outbuf);
outsize = set_message(outbuf,5,0,True);
outsize += nread;
SSVAL(outbuf,smb_vwv0,nread);
SSVAL(outbuf,smb_vwv5,nread+3);
p = smb_buf(outbuf);
*p++ = 1;
SSVAL(p,0,nread); p += 2;
set_message_end(outbuf, p+nread);
DEBUG(3, ( "process_lockread file = %s, fnum=%d num=%d nread=%d\n",
fsp->fsp_name, fsp->fnum, (int)numtoread, (int)nread ) );
send_blocking_reply(outbuf,outsize);
return True;
}