static void process_blocking_lock_cancel_message(struct messaging_context *ctx,
void *private_data,
uint32_t msg_type,
struct server_id server_id,
DATA_BLOB *data)
{
NTSTATUS err;
const char *msg = (const char *)data->data;
struct blocking_lock_record *blr;
if (data->data == NULL) {
smb_panic("process_blocking_lock_cancel_message: null msg");
}
if (data->length != MSG_BLOCKING_LOCK_CANCEL_SIZE) {
DEBUG(0, ("process_blocking_lock_cancel_message: "
"Got invalid msg len %d\n", (int)data->length));
smb_panic("process_blocking_lock_cancel_message: bad msg");
}
memcpy(&blr, msg, sizeof(blr));
memcpy(&err, &msg[sizeof(blr)], sizeof(NTSTATUS));
DEBUG(10,("process_blocking_lock_cancel_message: returning error %s\n",
nt_errstr(err) ));
blocking_lock_reply_error(blr, err);
DLIST_REMOVE(blocking_lock_cancelled_queue, blr);
TALLOC_FREE(blr);
}
static BOOL process_lock(blocking_lock_record *blr)
{
char *outbuf = OutBuffer;
char *inbuf = blr->inbuf;
int outsize;
SMB_BIG_UINT count = (SMB_BIG_UINT)0, offset = (SMB_BIG_UINT)0;
NTSTATUS status;
connection_struct *conn = conn_find(SVAL(inbuf,smb_tid));
files_struct *fsp = blr->fsp;
BOOL my_lock_ctx = False;
count = IVAL_TO_SMB_OFF_T(inbuf,smb_vwv1);
offset = IVAL_TO_SMB_OFF_T(inbuf,smb_vwv3);
errno = 0;
status = do_lock_spin(fsp, conn, SVAL(inbuf,smb_pid), count, offset, WRITE_LOCK, &my_lock_ctx);
if (NT_STATUS_IS_ERR(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.
*/
blocking_lock_reply_error(blr, status);
return True;
}
/*
* Still can't get the lock - keep waiting.
*/
DEBUG(10,("process_lock: failed to get lock for file = %s. Still waiting....\n",
fsp->fsp_name));
return False;
}
/*
* Success - we got the lock.
*/
DEBUG(3,("process_lock : file=%s fnum=%d offset=%.0f count=%.0f\n",
fsp->fsp_name, fsp->fnum, (double)offset, (double)count));
construct_reply_common(inbuf, outbuf);
outsize = set_message(outbuf,0,0,True);
send_blocking_reply(outbuf,outsize);
return True;
}
void remove_pending_lock_requests_by_mid_smb1(
struct smbd_server_connection *sconn, uint64_t mid)
{
struct blocking_lock_record *blr, *next = NULL;
for(blr = sconn->smb1.locks.blocking_lock_queue; blr; blr = next) {
files_struct *fsp;
struct byte_range_lock *br_lck;
next = blr->next;
if (blr->req->mid != mid) {
continue;
}
fsp = blr->fsp;
br_lck = brl_get_locks(talloc_tos(), fsp);
if (br_lck) {
DEBUG(10, ("remove_pending_lock_requests_by_mid_smb1 - "
"removing request type %d for file %s, %s\n",
blr->req->cmd, fsp_str_dbg(fsp),
fsp_fnum_dbg(fsp)));
brl_lock_cancel(br_lck,
blr->smblctx,
messaging_server_id(sconn->msg_ctx),
blr->offset,
blr->count,
blr->lock_flav,
blr);
TALLOC_FREE(br_lck);
}
blocking_lock_reply_error(blr,NT_STATUS_FILE_LOCK_CONFLICT);
DLIST_REMOVE(sconn->smb1.locks.blocking_lock_queue, blr);
TALLOC_FREE(blr);
}
}
void remove_pending_lock_requests_by_mid(int mid)
{
struct blocking_lock_record *blr, *next = NULL;
for(blr = blocking_lock_queue; blr; blr = next) {
files_struct *fsp;
struct byte_range_lock *br_lck;
next = blr->next;
if (blr->req->mid != mid) {
continue;
}
fsp = blr->fsp;
br_lck = brl_get_locks(talloc_tos(), fsp);
if (br_lck) {
DEBUG(10, ("remove_pending_lock_requests_by_mid - "
"removing request type %d for file %s fnum "
"= %d\n", blr->req->cmd, fsp->fsp_name,
fsp->fnum ));
brl_lock_cancel(br_lck,
blr->lock_pid,
procid_self(),
blr->offset,
blr->count,
blr->lock_flav,
blr);
TALLOC_FREE(br_lck);
}
blocking_lock_reply_error(blr,NT_STATUS_FILE_LOCK_CONFLICT);
DLIST_REMOVE(blocking_lock_queue, blr);
TALLOC_FREE(blr);
}
}
static bool process_trans2(struct blocking_lock_record *blr)
{
char params[2];
NTSTATUS status;
struct byte_range_lock *br_lck = do_lock(
blr->fsp->conn->sconn->msg_ctx,
blr->fsp,
blr->smblctx,
blr->count,
blr->offset,
blr->lock_type,
blr->lock_flav,
True,
&status,
&blr->blocking_smblctx,
blr);
TALLOC_FREE(br_lck);
if (!NT_STATUS_IS_OK(status)) {
if (ERROR_WAS_LOCK_DENIED(status)) {
/* Still can't get the lock, just keep waiting. */
return False;
}
/*
* We have other than a "can't get lock"
* error. Send an error and return True so we get dequeued.
*/
blocking_lock_reply_error(blr, status);
return True;
}
/* We finally got the lock, return success. */
SSVAL(params,0,0);
/* Fake up max_data_bytes here - we know it fits. */
send_trans2_replies(blr->fsp->conn, blr->req, NT_STATUS_OK, params, 2, NULL, 0, 0xffff);
return True;
}
void process_blocking_lock_queue(void)
{
struct timeval tv_curr = timeval_current();
struct blocking_lock_record *blr, *next = NULL;
bool recalc_timeout = False;
/*
* Go through the queue and see if we can get any of the locks.
*/
for (blr = blocking_lock_queue; blr; blr = next) {
next = blr->next;
/*
* Go through the remaining locks and try and obtain them.
* The call returns True if all locks were obtained successfully
* and False if we still need to wait.
*/
DEBUG(10, ("Processing BLR = %p\n", blr));
if(blocking_lock_record_process(blr)) {
struct byte_range_lock *br_lck = brl_get_locks(
talloc_tos(), blr->fsp);
DEBUG(10, ("BLR_process returned true: cancelling and "
"removing lock. BLR = %p\n", blr));
if (br_lck) {
brl_lock_cancel(br_lck,
blr->lock_pid,
procid_self(),
blr->offset,
blr->count,
blr->lock_flav,
blr);
TALLOC_FREE(br_lck);
}
DLIST_REMOVE(blocking_lock_queue, blr);
TALLOC_FREE(blr);
recalc_timeout = True;
continue;
}
/*
* We couldn't get the locks for this record on the list.
* If the time has expired, return a lock error.
*/
if (!timeval_is_zero(&blr->expire_time) && timeval_compare(&blr->expire_time, &tv_curr) <= 0) {
struct byte_range_lock *br_lck = brl_get_locks(
talloc_tos(), blr->fsp);
DEBUG(10, ("Lock timed out! BLR = %p\n", blr));
/*
* Lock expired - throw away all previously
* obtained locks and return lock error.
*/
if (br_lck) {
DEBUG(5,("process_blocking_lock_queue: "
"pending lock fnum = %d for file %s "
"timed out.\n", blr->fsp->fnum,
blr->fsp->fsp_name ));
brl_lock_cancel(br_lck,
blr->lock_pid,
procid_self(),
blr->offset,
blr->count,
blr->lock_flav,
blr);
TALLOC_FREE(br_lck);
}
blocking_lock_reply_error(blr,NT_STATUS_FILE_LOCK_CONFLICT);
DLIST_REMOVE(blocking_lock_queue, blr);
TALLOC_FREE(blr);
recalc_timeout = True;
}
}
if (recalc_timeout) {
recalc_brl_timeout();
}
}
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;
}
void process_blocking_lock_queue(struct smbd_server_connection *sconn)
{
struct timeval tv_curr = timeval_current();
struct blocking_lock_record *blr, *next = NULL;
if (sconn->using_smb2) {
process_blocking_lock_queue_smb2(sconn, tv_curr);
return;
}
/*
* Go through the queue and see if we can get any of the locks.
*/
for (blr = sconn->smb1.locks.blocking_lock_queue; blr; blr = next) {
next = blr->next;
/*
* Go through the remaining locks and try and obtain them.
* The call returns True if all locks were obtained successfully
* and False if we still need to wait.
*/
DEBUG(10, ("Processing BLR = %p\n", blr));
/* We use set_current_service so connections with
* pending locks are not marked as idle.
*/
set_current_service(blr->fsp->conn,
SVAL(blr->req->inbuf,smb_flg),
false);
if(blocking_lock_record_process(blr)) {
struct byte_range_lock *br_lck = brl_get_locks(
talloc_tos(), blr->fsp);
DEBUG(10, ("BLR_process returned true: cancelling and "
"removing lock. BLR = %p\n", blr));
if (br_lck) {
brl_lock_cancel(br_lck,
blr->smblctx,
messaging_server_id(sconn->msg_ctx),
blr->offset,
blr->count,
blr->lock_flav,
blr);
TALLOC_FREE(br_lck);
}
DLIST_REMOVE(sconn->smb1.locks.blocking_lock_queue, blr);
TALLOC_FREE(blr);
continue;
}
/*
* We couldn't get the locks for this record on the list.
* If the time has expired, return a lock error.
*/
if (!timeval_is_zero(&blr->expire_time) && timeval_compare(&blr->expire_time, &tv_curr) <= 0) {
struct byte_range_lock *br_lck = brl_get_locks(
talloc_tos(), blr->fsp);
DEBUG(10, ("Lock timed out! BLR = %p\n", blr));
/*
* Lock expired - throw away all previously
* obtained locks and return lock error.
*/
if (br_lck) {
DEBUG(5,("process_blocking_lock_queue: "
"pending lock for %s, file %s "
"timed out.\n", fsp_fnum_dbg(blr->fsp),
fsp_str_dbg(blr->fsp)));
brl_lock_cancel(br_lck,
blr->smblctx,
messaging_server_id(sconn->msg_ctx),
blr->offset,
blr->count,
blr->lock_flav,
blr);
TALLOC_FREE(br_lck);
}
blocking_lock_reply_error(blr,NT_STATUS_FILE_LOCK_CONFLICT);
DLIST_REMOVE(sconn->smb1.locks.blocking_lock_queue, blr);
TALLOC_FREE(blr);
}
}
recalc_brl_timeout(sconn);
}
