NTSTATUS query_lock(files_struct *fsp,
uint64_t *psmblctx,
uint64_t *pcount,
uint64_t *poffset,
enum brl_type *plock_type,
enum brl_flavour lock_flav)
{
struct byte_range_lock *br_lck = NULL;
if (!fsp->can_lock) {
return fsp->is_directory ? NT_STATUS_INVALID_DEVICE_REQUEST : NT_STATUS_INVALID_HANDLE;
}
if (!lp_locking(fsp->conn->params)) {
return NT_STATUS_OK;
}
br_lck = brl_get_locks_readonly(fsp);
if (!br_lck) {
return NT_STATUS_NO_MEMORY;
}
return brl_lockquery(br_lck,
psmblctx,
messaging_server_id(fsp->conn->sconn->msg_ctx),
poffset,
pcount,
plock_type,
lock_flav);
}
NTSTATUS query_lock(files_struct *fsp,
uint32 *psmbpid,
SMB_BIG_UINT *pcount,
SMB_BIG_UINT *poffset,
enum brl_type *plock_type,
enum brl_flavour lock_flav)
{
struct byte_range_lock *br_lck = NULL;
NTSTATUS status = NT_STATUS_LOCK_NOT_GRANTED;
if (!fsp->can_lock) {
return fsp->is_directory ? NT_STATUS_INVALID_DEVICE_REQUEST : NT_STATUS_INVALID_HANDLE;
}
if (!lp_locking(fsp->conn->params)) {
return NT_STATUS_OK;
}
br_lck = brl_get_locks_readonly(NULL, fsp);
if (!br_lck) {
return NT_STATUS_NO_MEMORY;
}
status = brl_lockquery(br_lck,
psmbpid,
procid_self(),
poffset,
pcount,
plock_type,
lock_flav);
TALLOC_FREE(br_lck);
return status;
}
bool update_num_read_oplocks(files_struct *fsp, struct share_mode_lock *lck)
{
struct share_mode_data *d = lck->data;
struct byte_range_lock *br_lck;
uint32_t num_read_oplocks = 0;
uint32_t i;
if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
/*
* If we're the only one, we don't need a brlock entry
*/
remove_stale_share_mode_entries(d);
SMB_ASSERT(d->num_share_modes == 1);
SMB_ASSERT(EXCLUSIVE_OPLOCK_TYPE(d->share_modes[0].op_type));
return true;
}
for (i=0; i<d->num_share_modes; i++) {
struct share_mode_entry *e = &d->share_modes[i];
uint32_t e_lease_type = get_lease_type(d, e);
if (e_lease_type & SMB2_LEASE_READ) {
num_read_oplocks += 1;
}
}
br_lck = brl_get_locks_readonly(fsp);
if (br_lck == NULL) {
return false;
}
if (brl_num_read_oplocks(br_lck) == num_read_oplocks) {
return true;
}
br_lck = brl_get_locks(talloc_tos(), fsp);
if (br_lck == NULL) {
return false;
}
brl_set_num_read_oplocks(br_lck, num_read_oplocks);
TALLOC_FREE(br_lck);
return true;
}
bool strict_lock_default(files_struct *fsp, struct lock_struct *plock)
{
int strict_locking = lp_strict_locking(fsp->conn->params);
bool ret = False;
if (plock->size == 0) {
return True;
}
if (!lp_locking(fsp->conn->params) || !strict_locking) {
return True;
}
if (strict_locking == Auto) {
if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type) && (plock->lock_type == READ_LOCK || plock->lock_type == WRITE_LOCK)) {
DEBUG(10,("is_locked: optimisation - exclusive oplock on file %s\n", fsp_str_dbg(fsp)));
ret = True;
} else if ((fsp->oplock_type == LEVEL_II_OPLOCK) &&
(plock->lock_type == READ_LOCK)) {
DEBUG(10,("is_locked: optimisation - level II oplock on file %s\n", fsp_str_dbg(fsp)));
ret = True;
} else {
struct byte_range_lock *br_lck;
br_lck = brl_get_locks_readonly(fsp);
if (!br_lck) {
return True;
}
ret = brl_locktest(br_lck,
plock->context.smblctx,
plock->context.pid,
plock->start,
plock->size,
plock->lock_type,
plock->lock_flav);
}
} else {
struct byte_range_lock *br_lck;
br_lck = brl_get_locks_readonly(fsp);
if (!br_lck) {
return True;
}
ret = brl_locktest(br_lck,
plock->context.smblctx,
plock->context.pid,
plock->start,
plock->size,
plock->lock_type,
plock->lock_flav);
}
DEBUG(10,("strict_lock_default: flavour = %s brl start=%.0f "
"len=%.0f %s for fnum %llu file %s\n",
lock_flav_name(plock->lock_flav),
(double)plock->start, (double)plock->size,
ret ? "unlocked" : "locked",
(unsigned long long)plock->fnum, fsp_str_dbg(fsp)));
return ret;
}
BOOL is_locked(files_struct *fsp,
uint32 smbpid,
SMB_BIG_UINT count,
SMB_BIG_UINT offset,
enum brl_type lock_type)
{
int strict_locking = lp_strict_locking(fsp->conn->params);
enum brl_flavour lock_flav = lp_posix_cifsu_locktype(fsp);
BOOL ret = True;
if (count == 0) {
return False;
}
if (!lp_locking(fsp->conn->params) || !strict_locking) {
return False;
}
if (strict_locking == Auto) {
if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type) && (lock_type == READ_LOCK || lock_type == WRITE_LOCK)) {
DEBUG(10,("is_locked: optimisation - exclusive oplock on file %s\n", fsp->fsp_name ));
ret = False;
} else if ((fsp->oplock_type == LEVEL_II_OPLOCK) &&
(lock_type == READ_LOCK)) {
DEBUG(10,("is_locked: optimisation - level II oplock on file %s\n", fsp->fsp_name ));
ret = False;
} else {
struct byte_range_lock *br_lck = brl_get_locks_readonly(NULL, fsp);
if (!br_lck) {
return False;
}
ret = !brl_locktest(br_lck,
smbpid,
procid_self(),
offset,
count,
lock_type,
lock_flav);
TALLOC_FREE(br_lck);
}
} else {
struct byte_range_lock *br_lck = brl_get_locks_readonly(NULL, fsp);
if (!br_lck) {
return False;
}
ret = !brl_locktest(br_lck,
smbpid,
procid_self(),
offset,
count,
lock_type,
lock_flav);
TALLOC_FREE(br_lck);
}
DEBUG(10,("is_locked: flavour = %s brl start=%.0f len=%.0f %s for fnum %d file %s\n",
lock_flav_name(lock_flav),
(double)offset, (double)count, ret ? "locked" : "unlocked",
fsp->fnum, fsp->fsp_name ));
return ret;
}
