Commit 70af0e3b authored by David Howells's avatar David Howells
Browse files

afs: Better abort and net error handling 



If we receive a network error, a remote abort or a protocol error whilst
we're still transmitting data, make sure we return an appropriate error to
the caller rather than ESHUTDOWN or ECONNABORTED.

Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
parent 1157f153

fs/afs/rxrpc.c

+27 −8
Original line number Diff line number Diff line
@@ -340,6 +340,8 @@ int afs_make_call(struct in_addr *addr, struct afs_call *call, gfp_t gfp, 
	struct rxrpc_call *rxcall;

	struct msghdr msg;

	struct kvec iov[1];

	size_t offset;

	u32 abort_code;

	int ret;



	_enter("%x,{%d},", addr->s_addr, ntohs(call->port));
@@ -388,9 +390,11 @@ int afs_make_call(struct in_addr *addr, struct afs_call *call, gfp_t gfp, 
	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 */

	/* We have to change the state *before* sending the last packet as

	 * rxrpc might give us the reply before it returns from sending the

	 * request.  Further, if the send fails, we may already have been given

	 * a notification and may have collected it.

	 */

	if (!call->send_pages)

		call->state = AFS_CALL_AWAIT_REPLY;

	ret = rxrpc_kernel_send_data(afs_socket, rxcall,
@@ -412,7 +416,17 @@ int afs_make_call(struct in_addr *addr, struct afs_call *call, gfp_t gfp, 
	return afs_wait_for_call_to_complete(call);



error_do_abort:

	rxrpc_kernel_abort_call(afs_socket, rxcall, RX_USER_ABORT, -ret, "KSD");

	call->state = AFS_CALL_COMPLETE;

	if (ret != -ECONNABORTED) {

		rxrpc_kernel_abort_call(afs_socket, rxcall, RX_USER_ABORT,

					-ret, "KSD");

	} else {

		abort_code = 0;

		offset = 0;

		rxrpc_kernel_recv_data(afs_socket, rxcall, NULL, 0, &offset,

				       false, &abort_code);

		ret = call->type->abort_to_error(abort_code);

	}

error_kill_call:

	afs_put_call(call);

	_leave(" = %d", ret);
@@ -459,16 +473,18 @@ static void afs_deliver_to_call(struct afs_call *call) 
		case -EINPROGRESS:

		case -EAGAIN:

			goto out;

		case -ECONNABORTED:

			goto call_complete;

		case -ENOTCONN:

			abort_code = RX_CALL_DEAD;

			rxrpc_kernel_abort_call(afs_socket, call->rxcall,

						abort_code, -ret, "KNC");

			goto do_abort;

			goto save_error;

		case -ENOTSUPP:

			abort_code = RXGEN_OPCODE;

			rxrpc_kernel_abort_call(afs_socket, call->rxcall,

						abort_code, -ret, "KIV");

			goto do_abort;

			goto save_error;

		case -ENODATA:

		case -EBADMSG:

		case -EMSGSIZE:
@@ -478,7 +494,7 @@ static void afs_deliver_to_call(struct afs_call *call) 
				abort_code = RXGEN_SS_UNMARSHAL;

			rxrpc_kernel_abort_call(afs_socket, call->rxcall,

						abort_code, EBADMSG, "KUM");

			goto do_abort;

			goto save_error;

		}

	}
@@ -489,8 +505,9 @@ out: 
	_leave("");

	return;



do_abort:

save_error:

	call->error = ret;

call_complete:

	call->state = AFS_CALL_COMPLETE;

	goto done;

}
@@ -538,6 +555,8 @@ static int afs_wait_for_call_to_complete(struct afs_call *call) 
		_debug("call incomplete");

		rxrpc_kernel_abort_call(afs_socket, call->rxcall,

					RX_CALL_DEAD, -ret, abort_why);

	} else if (call->error < 0) {

		ret = call->error;

	}



	_debug("call complete");

CRA Git | Maintained and supported by SUSTech CRA and CCSE