Example #1
0
File: rxrpc.c Project: 7799/linux
/*
 * send a simple reply
 */
void afs_send_simple_reply(struct afs_call *call, const void *buf, size_t len)
{
	struct msghdr msg;
	struct iovec iov[1];
	int n;

	_enter("");

	iov[0].iov_base		= (void *) buf;
	iov[0].iov_len		= len;
	msg.msg_name		= NULL;
	msg.msg_namelen		= 0;
	msg.msg_iov		= iov;
	msg.msg_iovlen		= 1;
	msg.msg_control		= NULL;
	msg.msg_controllen	= 0;
	msg.msg_flags		= 0;

	call->state = AFS_CALL_AWAIT_ACK;
	n = rxrpc_kernel_send_data(call->rxcall, &msg, len);
	if (n >= 0) {
		_leave(" [replied]");
		return;
	}
	if (n == -ENOMEM) {
		_debug("oom");
		rxrpc_kernel_abort_call(call->rxcall, RX_USER_ABORT);
	}
	rxrpc_kernel_end_call(call->rxcall);
	call->rxcall = NULL;
	call->type->destructor(call);
	afs_free_call(call);
	_leave(" [error]");
}
Example #2
0
File: rxrpc.c Project: 020gzh/linux
/*
 * send an empty reply
 */
void afs_send_empty_reply(struct afs_call *call)
{
	struct msghdr msg;

	_enter("");

	msg.msg_name		= NULL;
	msg.msg_namelen		= 0;
	iov_iter_kvec(&msg.msg_iter, WRITE | ITER_KVEC, NULL, 0, 0);
	msg.msg_control		= NULL;
	msg.msg_controllen	= 0;
	msg.msg_flags		= 0;

	call->state = AFS_CALL_AWAIT_ACK;
	switch (rxrpc_kernel_send_data(call->rxcall, &msg, 0)) {
	case 0:
		_leave(" [replied]");
		return;

	case -ENOMEM:
		_debug("oom");
		rxrpc_kernel_abort_call(call->rxcall, RX_USER_ABORT);
	default:
		afs_end_call(call);
		_leave(" [error]");
		return;
	}
}
Example #3
0
File: rxrpc.c Project: 7799/linux
/*
 * send an empty reply
 */
void afs_send_empty_reply(struct afs_call *call)
{
	struct msghdr msg;
	struct iovec iov[1];

	_enter("");

	iov[0].iov_base		= NULL;
	iov[0].iov_len		= 0;
	msg.msg_name		= NULL;
	msg.msg_namelen		= 0;
	msg.msg_iov		= iov;
	msg.msg_iovlen		= 0;
	msg.msg_control		= NULL;
	msg.msg_controllen	= 0;
	msg.msg_flags		= 0;

	call->state = AFS_CALL_AWAIT_ACK;
	switch (rxrpc_kernel_send_data(call->rxcall, &msg, 0)) {
	case 0:
		_leave(" [replied]");
		return;

	case -ENOMEM:
		_debug("oom");
		rxrpc_kernel_abort_call(call->rxcall, RX_USER_ABORT);
	default:
		rxrpc_kernel_end_call(call->rxcall);
		call->rxcall = NULL;
		call->type->destructor(call);
		afs_free_call(call);
		_leave(" [error]");
		return;
	}
}
Example #4
0
File: rxrpc.c Project: 020gzh/linux
/*
 * send a simple reply
 */
void afs_send_simple_reply(struct afs_call *call, const void *buf, size_t len)
{
	struct msghdr msg;
	struct kvec iov[1];
	int n;

	_enter("");

	iov[0].iov_base		= (void *) buf;
	iov[0].iov_len		= len;
	msg.msg_name		= NULL;
	msg.msg_namelen		= 0;
	iov_iter_kvec(&msg.msg_iter, WRITE | ITER_KVEC, iov, 1, len);
	msg.msg_control		= NULL;
	msg.msg_controllen	= 0;
	msg.msg_flags		= 0;

	call->state = AFS_CALL_AWAIT_ACK;
	n = rxrpc_kernel_send_data(call->rxcall, &msg, len);
	if (n >= 0) {
		/* Success */
		_leave(" [replied]");
		return;
	}

	if (n == -ENOMEM) {
		_debug("oom");
		rxrpc_kernel_abort_call(call->rxcall, RX_USER_ABORT);
	}
	afs_end_call(call);
	_leave(" [error]");
}
Example #5
0
File: rxrpc.c Project: krzk/linux
/*
 * send a simple reply
 */
void afs_send_simple_reply(struct afs_call *call, const void *buf, size_t len)
{
	struct afs_net *net = call->net;
	struct msghdr msg;
	struct kvec iov[1];
	int n;

	_enter("");

	rxrpc_kernel_set_tx_length(net->socket, call->rxcall, len);

	iov[0].iov_base		= (void *) buf;
	iov[0].iov_len		= len;
	msg.msg_name		= NULL;
	msg.msg_namelen		= 0;
	iov_iter_kvec(&msg.msg_iter, WRITE | ITER_KVEC, iov, 1, len);
	msg.msg_control		= NULL;
	msg.msg_controllen	= 0;
	msg.msg_flags		= 0;

	n = rxrpc_kernel_send_data(net->socket, call->rxcall, &msg, len,
				   afs_notify_end_reply_tx);
	if (n >= 0) {
		/* Success */
		_leave(" [replied]");
		return;
	}

	if (n == -ENOMEM) {
		_debug("oom");
		rxrpc_kernel_abort_call(net->socket, call->rxcall,
					RX_USER_ABORT, -ENOMEM, "KOO");
	}
	_leave(" [error]");
}
Example #6
0
File: rxrpc.c Project: krzk/linux
/*
 * send an empty reply
 */
void afs_send_empty_reply(struct afs_call *call)
{
	struct afs_net *net = call->net;
	struct msghdr msg;

	_enter("");

	rxrpc_kernel_set_tx_length(net->socket, call->rxcall, 0);

	msg.msg_name		= NULL;
	msg.msg_namelen		= 0;
	iov_iter_kvec(&msg.msg_iter, WRITE | ITER_KVEC, NULL, 0, 0);
	msg.msg_control		= NULL;
	msg.msg_controllen	= 0;
	msg.msg_flags		= 0;

	switch (rxrpc_kernel_send_data(net->socket, call->rxcall, &msg, 0,
				       afs_notify_end_reply_tx)) {
	case 0:
		_leave(" [replied]");
		return;

	case -ENOMEM:
		_debug("oom");
		rxrpc_kernel_abort_call(net->socket, call->rxcall,
					RX_USER_ABORT, -ENOMEM, "KOO");
	default:
		_leave(" [error]");
		return;
	}
}
Example #7
0
File: rxrpc.c Project: 7799/linux
/*
 * wait synchronously for a call to complete
 */
static int afs_wait_for_call_to_complete(struct afs_call *call)
{
	struct sk_buff *skb;
	int ret;

	DECLARE_WAITQUEUE(myself, current);

	_enter("");

	add_wait_queue(&call->waitq, &myself);
	for (;;) {
		set_current_state(TASK_INTERRUPTIBLE);

		/* deliver any messages that are in the queue */
		if (!skb_queue_empty(&call->rx_queue)) {
			__set_current_state(TASK_RUNNING);
			afs_deliver_to_call(call);
			continue;
		}

		ret = call->error;
		if (call->state >= AFS_CALL_COMPLETE)
			break;
		ret = -EINTR;
		if (signal_pending(current))
			break;
		schedule();
	}

	remove_wait_queue(&call->waitq, &myself);
	__set_current_state(TASK_RUNNING);

	/* kill the call */
	if (call->state < AFS_CALL_COMPLETE) {
		_debug("call incomplete");
		rxrpc_kernel_abort_call(call->rxcall, RX_CALL_DEAD);
		while ((skb = skb_dequeue(&call->rx_queue)))
			afs_free_skb(skb);
	}

	_debug("call complete");
	rxrpc_kernel_end_call(call->rxcall);
	call->rxcall = NULL;
	call->type->destructor(call);
	afs_free_call(call);
	_leave(" = %d", ret);
	return ret;
}
Example #8
0
File: rxrpc.c Project: 7799/linux
/*
 * deliver messages to a call
 */
static void afs_deliver_to_call(struct afs_call *call)
{
	struct sk_buff *skb;
	bool last;
	u32 abort_code;
	int ret;

	_enter("");

	while ((call->state == AFS_CALL_AWAIT_REPLY ||
		call->state == AFS_CALL_AWAIT_OP_ID ||
		call->state == AFS_CALL_AWAIT_REQUEST ||
		call->state == AFS_CALL_AWAIT_ACK) &&
	       (skb = skb_dequeue(&call->rx_queue))) {
		switch (skb->mark) {
		case RXRPC_SKB_MARK_DATA:
			_debug("Rcv DATA");
			last = rxrpc_kernel_is_data_last(skb);
			ret = call->type->deliver(call, skb, last);
			switch (ret) {
			case 0:
				if (last &&
				    call->state == AFS_CALL_AWAIT_REPLY)
					call->state = AFS_CALL_COMPLETE;
				break;
			case -ENOTCONN:
				abort_code = RX_CALL_DEAD;
				goto do_abort;
			case -ENOTSUPP:
				abort_code = RX_INVALID_OPERATION;
				goto do_abort;
			default:
				abort_code = RXGEN_CC_UNMARSHAL;
				if (call->state != AFS_CALL_AWAIT_REPLY)
					abort_code = RXGEN_SS_UNMARSHAL;
			do_abort:
				rxrpc_kernel_abort_call(call->rxcall,
							abort_code);
				call->error = ret;
				call->state = AFS_CALL_ERROR;
				break;
			}
			afs_data_delivered(skb);
			skb = NULL;
			continue;
		case RXRPC_SKB_MARK_FINAL_ACK:
			_debug("Rcv ACK");
			call->state = AFS_CALL_COMPLETE;
			break;
		case RXRPC_SKB_MARK_BUSY:
			_debug("Rcv BUSY");
			call->error = -EBUSY;
			call->state = AFS_CALL_BUSY;
			break;
		case RXRPC_SKB_MARK_REMOTE_ABORT:
			abort_code = rxrpc_kernel_get_abort_code(skb);
			call->error = call->type->abort_to_error(abort_code);
			call->state = AFS_CALL_ABORTED;
			_debug("Rcv ABORT %u -> %d", abort_code, call->error);
			break;
		case RXRPC_SKB_MARK_NET_ERROR:
			call->error = -rxrpc_kernel_get_error_number(skb);
			call->state = AFS_CALL_ERROR;
			_debug("Rcv NET ERROR %d", call->error);
			break;
		case RXRPC_SKB_MARK_LOCAL_ERROR:
			call->error = -rxrpc_kernel_get_error_number(skb);
			call->state = AFS_CALL_ERROR;
			_debug("Rcv LOCAL ERROR %d", call->error);
			break;
		default:
			BUG();
			break;
		}

		afs_free_skb(skb);
	}

	/* make sure the queue is empty if the call is done with (we might have
	 * aborted the call early because of an unmarshalling error) */
	if (call->state >= AFS_CALL_COMPLETE) {
		while ((skb = skb_dequeue(&call->rx_queue)))
			afs_free_skb(skb);
		if (call->incoming) {
			rxrpc_kernel_end_call(call->rxcall);
			call->rxcall = NULL;
			call->type->destructor(call);
			afs_free_call(call);
		}
	}

	_leave("");
}
Example #9
0
File: rxrpc.c Project: 7799/linux
/*
 * initiate a call
 */
int afs_make_call(struct in_addr *addr, struct afs_call *call, gfp_t gfp,
		  const struct afs_wait_mode *wait_mode)
{
	struct sockaddr_rxrpc srx;
	struct rxrpc_call *rxcall;
	struct msghdr msg;
	struct kvec iov[1];
	int ret;
	struct sk_buff *skb;

	_enter("%x,{%d},", addr->s_addr, ntohs(call->port));

	ASSERT(call->type != NULL);
	ASSERT(call->type->name != NULL);

	_debug("____MAKE %p{%s,%x} [%d]____",
	       call, call->type->name, key_serial(call->key),
	       atomic_read(&afs_outstanding_calls));

	call->wait_mode = wait_mode;
	INIT_WORK(&call->async_work, afs_process_async_call);

	memset(&srx, 0, sizeof(srx));
	srx.srx_family = AF_RXRPC;
	srx.srx_service = call->service_id;
	srx.transport_type = SOCK_DGRAM;
	srx.transport_len = sizeof(srx.transport.sin);
	srx.transport.sin.sin_family = AF_INET;
	srx.transport.sin.sin_port = call->port;
	memcpy(&srx.transport.sin.sin_addr, addr, 4);

	/* create a call */
	rxcall = rxrpc_kernel_begin_call(afs_socket, &srx, call->key,
					 (unsigned long) call, gfp);
	call->key = NULL;
	if (IS_ERR(rxcall)) {
		ret = PTR_ERR(rxcall);
		goto error_kill_call;
	}

	call->rxcall = rxcall;

	/* send the request */
	iov[0].iov_base	= call->request;
	iov[0].iov_len	= call->request_size;

	msg.msg_name		= NULL;
	msg.msg_namelen		= 0;
	msg.msg_iov		= (struct iovec *) iov;
	msg.msg_iovlen		= 1;
	msg.msg_control		= NULL;
	msg.msg_controllen	= 0;
	msg.msg_flags		= (call->send_pages ? MSG_MORE : 0);

	/* have to change the state *before* sending the last packet as RxRPC
	 * might give us the reply before it returns from sending the
	 * request */
	if (!call->send_pages)
		call->state = AFS_CALL_AWAIT_REPLY;
	ret = rxrpc_kernel_send_data(rxcall, &msg, call->request_size);
	if (ret < 0)
		goto error_do_abort;

	if (call->send_pages) {
		ret = afs_send_pages(call, &msg, iov);
		if (ret < 0)
			goto error_do_abort;
	}

	/* at this point, an async call may no longer exist as it may have
	 * already completed */
	return wait_mode->wait(call);

error_do_abort:
	rxrpc_kernel_abort_call(rxcall, RX_USER_ABORT);
	while ((skb = skb_dequeue(&call->rx_queue)))
		afs_free_skb(skb);
	rxrpc_kernel_end_call(rxcall);
	call->rxcall = NULL;
error_kill_call:
	call->type->destructor(call);
	afs_free_call(call);
	_leave(" = %d", ret);
	return ret;
}
Example #10
0
File: rxrpc.c Project: krzk/linux
/*
 * wait synchronously for a call to complete
 */
static long afs_wait_for_call_to_complete(struct afs_call *call,
					  struct afs_addr_cursor *ac)
{
	signed long rtt2, timeout;
	long ret;
	u64 rtt;
	u32 life, last_life;

	DECLARE_WAITQUEUE(myself, current);

	_enter("");

	rtt = rxrpc_kernel_get_rtt(call->net->socket, call->rxcall);
	rtt2 = nsecs_to_jiffies64(rtt) * 2;
	if (rtt2 < 2)
		rtt2 = 2;

	timeout = rtt2;
	last_life = rxrpc_kernel_check_life(call->net->socket, call->rxcall);

	add_wait_queue(&call->waitq, &myself);
	for (;;) {
		set_current_state(TASK_UNINTERRUPTIBLE);

		/* deliver any messages that are in the queue */
		if (!afs_check_call_state(call, AFS_CALL_COMPLETE) &&
		    call->need_attention) {
			call->need_attention = false;
			__set_current_state(TASK_RUNNING);
			afs_deliver_to_call(call);
			continue;
		}

		if (afs_check_call_state(call, AFS_CALL_COMPLETE))
			break;

		life = rxrpc_kernel_check_life(call->net->socket, call->rxcall);
		if (timeout == 0 &&
		    life == last_life && signal_pending(current))
				break;

		if (life != last_life) {
			timeout = rtt2;
			last_life = life;
		}

		timeout = schedule_timeout(timeout);
	}

	remove_wait_queue(&call->waitq, &myself);
	__set_current_state(TASK_RUNNING);

	/* Kill off the call if it's still live. */
	if (!afs_check_call_state(call, AFS_CALL_COMPLETE)) {
		_debug("call interrupted");
		if (rxrpc_kernel_abort_call(call->net->socket, call->rxcall,
					    RX_USER_ABORT, -EINTR, "KWI"))
			afs_set_call_complete(call, -EINTR, 0);
	}

	spin_lock_bh(&call->state_lock);
	ac->abort_code = call->abort_code;
	ac->error = call->error;
	spin_unlock_bh(&call->state_lock);

	ret = ac->error;
	switch (ret) {
	case 0:
		if (call->ret_reply0) {
			ret = (long)call->reply[0];
			call->reply[0] = NULL;
		}
		/* Fall through */
	case -ECONNABORTED:
		ac->responded = true;
		break;
	}

	_debug("call complete");
	afs_put_call(call);
	_leave(" = %p", (void *)ret);
	return ret;
}
Example #11
0
File: rxrpc.c Project: krzk/linux
/*
 * deliver messages to a call
 */
static void afs_deliver_to_call(struct afs_call *call)
{
	enum afs_call_state state;
	u32 abort_code, remote_abort = 0;
	int ret;

	_enter("%s", call->type->name);

	while (state = READ_ONCE(call->state),
	       state == AFS_CALL_CL_AWAIT_REPLY ||
	       state == AFS_CALL_SV_AWAIT_OP_ID ||
	       state == AFS_CALL_SV_AWAIT_REQUEST ||
	       state == AFS_CALL_SV_AWAIT_ACK
	       ) {
		if (state == AFS_CALL_SV_AWAIT_ACK) {
			size_t offset = 0;
			ret = rxrpc_kernel_recv_data(call->net->socket,
						     call->rxcall,
						     NULL, 0, &offset, false,
						     &remote_abort,
						     &call->service_id);
			trace_afs_recv_data(call, 0, offset, false, ret);

			if (ret == -EINPROGRESS || ret == -EAGAIN)
				return;
			if (ret < 0 || ret == 1) {
				if (ret == 1)
					ret = 0;
				goto call_complete;
			}
			return;
		}

		ret = call->type->deliver(call);
		state = READ_ONCE(call->state);
		switch (ret) {
		case 0:
			if (state == AFS_CALL_CL_PROC_REPLY) {
				if (call->cbi)
					set_bit(AFS_SERVER_FL_MAY_HAVE_CB,
						&call->cbi->server->flags);
				goto call_complete;
			}
			ASSERTCMP(state, >, AFS_CALL_CL_PROC_REPLY);
			goto done;
		case -EINPROGRESS:
		case -EAGAIN:
			goto out;
		case -EIO:
		case -ECONNABORTED:
			ASSERTCMP(state, ==, AFS_CALL_COMPLETE);
			goto done;
		case -ENOTSUPP:
			abort_code = RXGEN_OPCODE;
			rxrpc_kernel_abort_call(call->net->socket, call->rxcall,
						abort_code, ret, "KIV");
			goto local_abort;
		case -ENODATA:
		case -EBADMSG:
		case -EMSGSIZE:
		default:
			abort_code = RXGEN_CC_UNMARSHAL;
			if (state != AFS_CALL_CL_AWAIT_REPLY)
				abort_code = RXGEN_SS_UNMARSHAL;
			rxrpc_kernel_abort_call(call->net->socket, call->rxcall,
						abort_code, -EBADMSG, "KUM");
			goto local_abort;
		}
	}

done:
	if (state == AFS_CALL_COMPLETE && call->incoming)
		afs_put_call(call);
out:
	_leave("");
	return;

local_abort:
	abort_code = 0;
call_complete:
	afs_set_call_complete(call, ret, remote_abort);
	state = AFS_CALL_COMPLETE;
	goto done;
}
Example #12
0
File: rxrpc.c Project: krzk/linux
/*
 * initiate a call
 */
long afs_make_call(struct afs_addr_cursor *ac, struct afs_call *call,
		   gfp_t gfp, bool async)
{
	struct sockaddr_rxrpc *srx = ac->addr;
	struct rxrpc_call *rxcall;
	struct msghdr msg;
	struct kvec iov[1];
	size_t offset;
	s64 tx_total_len;
	int ret;

	_enter(",{%pISp},", &srx->transport);

	ASSERT(call->type != NULL);
	ASSERT(call->type->name != NULL);

	_debug("____MAKE %p{%s,%x} [%d]____",
	       call, call->type->name, key_serial(call->key),
	       atomic_read(&call->net->nr_outstanding_calls));

	call->async = async;

	/* Work out the length we're going to transmit.  This is awkward for
	 * calls such as FS.StoreData where there's an extra injection of data
	 * after the initial fixed part.
	 */
	tx_total_len = call->request_size;
	if (call->send_pages) {
		if (call->last == call->first) {
			tx_total_len += call->last_to - call->first_offset;
		} else {
			/* It looks mathematically like you should be able to
			 * combine the following lines with the ones above, but
			 * unsigned arithmetic is fun when it wraps...
			 */
			tx_total_len += PAGE_SIZE - call->first_offset;
			tx_total_len += call->last_to;
			tx_total_len += (call->last - call->first - 1) * PAGE_SIZE;
		}
	}

	/* create a call */
	rxcall = rxrpc_kernel_begin_call(call->net->socket, srx, call->key,
					 (unsigned long)call,
					 tx_total_len, gfp,
					 (async ?
					  afs_wake_up_async_call :
					  afs_wake_up_call_waiter),
					 call->upgrade,
					 call->debug_id);
	if (IS_ERR(rxcall)) {
		ret = PTR_ERR(rxcall);
		goto error_kill_call;
	}

	call->rxcall = rxcall;

	/* send the request */
	iov[0].iov_base	= call->request;
	iov[0].iov_len	= call->request_size;

	msg.msg_name		= NULL;
	msg.msg_namelen		= 0;
	iov_iter_kvec(&msg.msg_iter, WRITE | ITER_KVEC, iov, 1,
		      call->request_size);
	msg.msg_control		= NULL;
	msg.msg_controllen	= 0;
	msg.msg_flags		= MSG_WAITALL | (call->send_pages ? MSG_MORE : 0);

	ret = rxrpc_kernel_send_data(call->net->socket, rxcall,
				     &msg, call->request_size,
				     afs_notify_end_request_tx);
	if (ret < 0)
		goto error_do_abort;

	if (call->send_pages) {
		ret = afs_send_pages(call, &msg);
		if (ret < 0)
			goto error_do_abort;
	}

	/* at this point, an async call may no longer exist as it may have
	 * already completed */
	if (call->async)
		return -EINPROGRESS;

	return afs_wait_for_call_to_complete(call, ac);

error_do_abort:
	call->state = AFS_CALL_COMPLETE;
	if (ret != -ECONNABORTED) {
		rxrpc_kernel_abort_call(call->net->socket, rxcall,
					RX_USER_ABORT, ret, "KSD");
	} else {
		offset = 0;
		rxrpc_kernel_recv_data(call->net->socket, rxcall, NULL,
				       0, &offset, false, &call->abort_code,
				       &call->service_id);
		ac->abort_code = call->abort_code;
		ac->responded = true;
	}
	call->error = ret;
	trace_afs_call_done(call);
error_kill_call:
	afs_put_call(call);
	ac->error = ret;
	_leave(" = %d", ret);
	return ret;
}