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 undo_locks_obtained(struct blocking_lock_record *blr)
{
files_struct *fsp = blr->fsp;
uint16 num_ulocks = SVAL(blr->req->vwv+6, 0);
uint64_t count = (uint64_t)0, offset = (uint64_t) 0;
uint64_t smblctx;
unsigned char locktype = CVAL(blr->req->vwv+3, 0);
bool large_file_format = (locktype & LOCKING_ANDX_LARGE_FILES);
uint8_t *data;
int i;
data = discard_const_p(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;
smblctx = 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->sconn->msg_ctx,
fsp,
smblctx,
count,
offset,
WINDOWS_LOCK);
}
}
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 bool process_lockingX(struct blocking_lock_record *blr)
{
unsigned char locktype = CVAL(blr->req->vwv+3, 0);
files_struct *fsp = blr->fsp;
uint16 num_ulocks = SVAL(blr->req->vwv+6, 0);
uint16 num_locks = SVAL(blr->req->vwv+7, 0);
uint64_t count = (uint64_t)0, offset = (uint64_t)0;
uint32 lock_pid;
bool large_file_format = (locktype & LOCKING_ANDX_LARGE_FILES);
uint8_t *data;
NTSTATUS status = NT_STATUS_OK;
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.
*/
for(; blr->lock_num < num_locks; blr->lock_num++) {
struct byte_range_lock *br_lck = NULL;
bool err;
lock_pid = get_lock_pid( data, blr->lock_num, large_file_format);
count = get_lock_count( data, blr->lock_num, large_file_format);
offset = get_lock_offset( data, blr->lock_num, large_file_format, &err);
/*
* We know err cannot be set as if it was the lock
* request would never have been queued. JRA.
*/
errno = 0;
br_lck = do_lock(smbd_messaging_context(),
fsp,
lock_pid,
count,
offset,
((locktype & LOCKING_ANDX_SHARED_LOCK) ?
READ_LOCK : WRITE_LOCK),
WINDOWS_LOCK,
True,
&status,
&blr->blocking_pid,
blr);
TALLOC_FREE(br_lck);
if (NT_STATUS_IS_ERR(status)) {
break;
}
}
if(blr->lock_num == num_locks) {
/*
* Success - we got all the locks.
*/
DEBUG(3,("process_lockingX file = %s, fnum=%d type=%d num_locks=%d\n",
fsp->fsp_name, fsp->fnum, (unsigned int)locktype, num_locks) );
reply_lockingX_success(blr);
return True;
}
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. Free any locks we had and return an error.
* Return True so we get dequeued.
*/
blocking_lock_reply_error(blr, status);
return True;
}
/*
* Still can't get all the locks - keep waiting.
*/
DEBUG(10,("process_lockingX: only got %d locks of %d needed for file %s, fnum = %d. \
Waiting....\n",
blr->lock_num, num_locks, fsp->fsp_name, fsp->fnum));
return False;
}
static BOOL process_lockingX(blocking_lock_record *blr)
{
char *inbuf = blr->inbuf;
unsigned char locktype = CVAL(inbuf,smb_vwv3);
files_struct *fsp = blr->fsp;
connection_struct *conn = conn_find(SVAL(inbuf,smb_tid));
uint16 num_ulocks = SVAL(inbuf,smb_vwv6);
uint16 num_locks = SVAL(inbuf,smb_vwv7);
SMB_BIG_UINT count = (SMB_BIG_UINT)0, offset = (SMB_BIG_UINT)0;
uint16 lock_pid;
BOOL large_file_format = (locktype & LOCKING_ANDX_LARGE_FILES);
char *data;
BOOL my_lock_ctx = False;
NTSTATUS status = NT_STATUS_OK;
data = smb_buf(inbuf) + ((large_file_format ? 20 : 10)*num_ulocks);
/*
* Data now points at the beginning of the list
* of smb_lkrng structs.
*/
for(; blr->lock_num < num_locks; blr->lock_num++) {
BOOL err;
lock_pid = get_lock_pid( data, blr->lock_num, large_file_format);
count = get_lock_count( data, blr->lock_num, large_file_format);
offset = get_lock_offset( data, blr->lock_num, large_file_format, &err);
/*
* We know err cannot be set as if it was the lock
* request would never have been queued. JRA.
*/
errno = 0;
status = do_lock_spin(fsp,conn,lock_pid,count,offset,
((locktype & 1) ? READ_LOCK : WRITE_LOCK), &my_lock_ctx);
if (NT_STATUS_IS_ERR(status)) break;
}
if(blr->lock_num == num_locks) {
/*
* Success - we got all the locks.
*/
DEBUG(3,("process_lockingX file = %s, fnum=%d type=%d num_locks=%d\n",
fsp->fsp_name, fsp->fnum, (unsigned int)locktype, num_locks) );
reply_lockingX_success(blr);
return True;
} else 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. Free any locks we had and return an error.
* Return True so we get dequeued.
*/
blocking_lock_reply_error(blr, status);
return True;
}
/*
* Still can't get all the locks - keep waiting.
*/
DEBUG(10,("process_lockingX: only got %d locks of %d needed for file %s, fnum = %d. \
Waiting....\n",
blr->lock_num, num_locks, fsp->fsp_name, fsp->fnum));
return False;
}