コード例 #1
0
ファイル: blocking.c プロジェクト: gojdic/samba
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();
	}
}
コード例 #2
0
ファイル: blocking.c プロジェクト: AIdrifter/samba
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);
}
コード例 #3
0
ファイル: blocking.c プロジェクト: gojdic/samba
bool push_blocking_lock_request( struct byte_range_lock *br_lck,
		struct smb_request *req,
		files_struct *fsp,
		int lock_timeout,
		int lock_num,
		uint32_t lock_pid,
		enum brl_type lock_type,
		enum brl_flavour lock_flav,
		uint64_t offset,
		uint64_t count,
		uint32_t blocking_pid)
{
	struct blocking_lock_record *blr;
	NTSTATUS status;

	if(req_is_in_chain(req)) {
		DEBUG(0,("push_blocking_lock_request: cannot queue a chained request (currently).\n"));
		return False;
	}

	/*
	 * Now queue an entry on the blocking lock queue. We setup
	 * the expiration time here.
	 */

	blr = talloc(NULL, struct blocking_lock_record);
	if (blr == NULL) {
		DEBUG(0,("push_blocking_lock_request: Malloc fail !\n" ));
		return False;
	}

	blr->next = NULL;
	blr->prev = NULL;

	blr->fsp = fsp;
	if (lock_timeout == -1) {
		blr->expire_time.tv_sec = 0;
		blr->expire_time.tv_usec = 0; /* Never expire. */
	} else {
		blr->expire_time = timeval_current_ofs(lock_timeout/1000,
					(lock_timeout % 1000) * 1000);
	}
	blr->lock_num = lock_num;
	blr->lock_pid = lock_pid;
	blr->blocking_pid = blocking_pid;
	blr->lock_flav = lock_flav;
	blr->lock_type = lock_type;
	blr->offset = offset;
	blr->count = count;
      
	/* Specific brl_lock() implementations can fill this in. */
	blr->blr_private = NULL;

	/* Add a pending lock record for this. */
	status = brl_lock(smbd_messaging_context(),
			br_lck,
			lock_pid,
			procid_self(),
			offset,
			count,
			lock_type == READ_LOCK ? PENDING_READ_LOCK : PENDING_WRITE_LOCK,
			blr->lock_flav,
			lock_timeout ? True : False, /* blocking_lock. */
			NULL,
			blr);

	if (!NT_STATUS_IS_OK(status)) {
		DEBUG(0,("push_blocking_lock_request: failed to add PENDING_LOCK record.\n"));
		TALLOC_FREE(blr);
		return False;
	}

	SMB_PERFCOUNT_DEFER_OP(&req->pcd, &req->pcd);
	blr->req = talloc_move(blr, &req);

	DLIST_ADD_END(blocking_lock_queue, blr, struct blocking_lock_record *);
	recalc_brl_timeout();

	/* Ensure we'll receive messages when this is unlocked. */
	if (!blocking_lock_unlock_state) {
		messaging_register(smbd_messaging_context(), NULL,
				   MSG_SMB_UNLOCK, received_unlock_msg);
		blocking_lock_unlock_state = true;
	}

	DEBUG(3,("push_blocking_lock_request: lock request blocked with "
		"expiry time (%u sec. %u usec) (+%d msec) for fnum = %d, name = %s\n",
		(unsigned int)blr->expire_time.tv_sec,
		(unsigned int)blr->expire_time.tv_usec, lock_timeout,
		blr->fsp->fnum, blr->fsp->fsp_name ));

	return True;
}
コード例 #4
0
ファイル: blocking.c プロジェクト: AIdrifter/samba
bool push_blocking_lock_request( struct byte_range_lock *br_lck,
		struct smb_request *req,
		files_struct *fsp,
		int lock_timeout,
		int lock_num,
		uint64_t smblctx,
		enum brl_type lock_type,
		enum brl_flavour lock_flav,
		uint64_t offset,
		uint64_t count,
		uint64_t blocking_smblctx)
{
	struct smbd_server_connection *sconn = req->sconn;
	struct blocking_lock_record *blr;
	NTSTATUS status;

	if (req->smb2req) {
		return push_blocking_lock_request_smb2(br_lck,
				req,
				fsp,
				lock_timeout,
				lock_num,
				smblctx,
				lock_type,
				lock_flav,
				offset,
				count,
				blocking_smblctx);
	}

	if(req_is_in_chain(req)) {
		DEBUG(0,("push_blocking_lock_request: cannot queue a chained request (currently).\n"));
		return False;
	}

	/*
	 * Now queue an entry on the blocking lock queue. We setup
	 * the expiration time here.
	 */

	blr = talloc(NULL, struct blocking_lock_record);
	if (blr == NULL) {
		DEBUG(0,("push_blocking_lock_request: Malloc fail !\n" ));
		return False;
	}

	blr->next = NULL;
	blr->prev = NULL;

	blr->fsp = fsp;
	if (lock_timeout == -1) {
		blr->expire_time.tv_sec = 0;
		blr->expire_time.tv_usec = 0; /* Never expire. */
	} else {
		blr->expire_time = timeval_current_ofs_msec(lock_timeout);
	}
	blr->lock_num = lock_num;
	blr->smblctx = smblctx;
	blr->blocking_smblctx = blocking_smblctx;
	blr->lock_flav = lock_flav;
	blr->lock_type = lock_type;
	blr->offset = offset;
	blr->count = count;

	/* Specific brl_lock() implementations can fill this in. */
	blr->blr_private = NULL;

	/* Add a pending lock record for this. */
	status = brl_lock(req->sconn->msg_ctx,
			br_lck,
			smblctx,
			messaging_server_id(req->sconn->msg_ctx),
			offset,
			count,
			lock_type == READ_LOCK ? PENDING_READ_LOCK : PENDING_WRITE_LOCK,
			blr->lock_flav,
			True,
			NULL,
			blr);

	if (!NT_STATUS_IS_OK(status)) {
		DEBUG(0,("push_blocking_lock_request: failed to add PENDING_LOCK record.\n"));
		TALLOC_FREE(blr);
		return False;
	}

	SMB_PERFCOUNT_DEFER_OP(&req->pcd, &req->pcd);
	blr->req = talloc_move(blr, &req);

	DLIST_ADD_END(sconn->smb1.locks.blocking_lock_queue, blr, struct blocking_lock_record *);
	recalc_brl_timeout(sconn);

	/* Ensure we'll receive messages when this is unlocked. */
	if (!sconn->smb1.locks.blocking_lock_unlock_state) {
		messaging_register(sconn->msg_ctx, sconn,
				   MSG_SMB_UNLOCK, received_unlock_msg);
		sconn->smb1.locks.blocking_lock_unlock_state = true;
	}

	DEBUG(3,("push_blocking_lock_request: lock request blocked with "
		"expiry time (%u sec. %u usec) (+%d msec) for %s, name = %s\n",
		(unsigned int)blr->expire_time.tv_sec,
		(unsigned int)blr->expire_time.tv_usec, lock_timeout,
		fsp_fnum_dbg(blr->fsp), fsp_str_dbg(blr->fsp)));

	return True;
}