mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 10:36:42 +07:00
9fbfb8b120
After the previous commit, we can now give the functions with temporary names, such as tipc_link_xmit2(), tipc_msg_build2() etc., their proper names. There are no functional changes in this commit. Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Reviewed-by: Erik Hugne <erik.hugne@ericsson.com> Reviewed-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
515 lines
13 KiB
C
515 lines
13 KiB
C
/*
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* net/tipc/port.c: TIPC port code
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*
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* Copyright (c) 1992-2007, 2014, Ericsson AB
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* Copyright (c) 2004-2008, 2010-2013, Wind River Systems
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the names of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "core.h"
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#include "config.h"
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#include "port.h"
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#include "name_table.h"
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#include "socket.h"
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/* Connection management: */
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#define PROBING_INTERVAL 3600000 /* [ms] => 1 h */
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#define MAX_REJECT_SIZE 1024
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DEFINE_SPINLOCK(tipc_port_list_lock);
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static LIST_HEAD(ports);
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static void port_handle_node_down(unsigned long ref);
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static struct sk_buff *port_build_self_abort_msg(struct tipc_port *, u32 err);
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static struct sk_buff *port_build_peer_abort_msg(struct tipc_port *, u32 err);
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static void port_timeout(unsigned long ref);
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/**
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* tipc_port_peer_msg - verify message was sent by connected port's peer
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*
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* Handles cases where the node's network address has changed from
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* the default of <0.0.0> to its configured setting.
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*/
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int tipc_port_peer_msg(struct tipc_port *p_ptr, struct tipc_msg *msg)
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{
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u32 peernode;
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u32 orignode;
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if (msg_origport(msg) != tipc_port_peerport(p_ptr))
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return 0;
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orignode = msg_orignode(msg);
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peernode = tipc_port_peernode(p_ptr);
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return (orignode == peernode) ||
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(!orignode && (peernode == tipc_own_addr)) ||
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(!peernode && (orignode == tipc_own_addr));
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}
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/* tipc_port_init - intiate TIPC port and lock it
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*
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* Returns obtained reference if initialization is successful, zero otherwise
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*/
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u32 tipc_port_init(struct tipc_port *p_ptr,
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const unsigned int importance)
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{
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struct tipc_msg *msg;
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u32 ref;
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ref = tipc_ref_acquire(p_ptr, &p_ptr->lock);
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if (!ref) {
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pr_warn("Port registration failed, ref. table exhausted\n");
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return 0;
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}
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p_ptr->max_pkt = MAX_PKT_DEFAULT;
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p_ptr->ref = ref;
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INIT_LIST_HEAD(&p_ptr->wait_list);
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INIT_LIST_HEAD(&p_ptr->subscription.nodesub_list);
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k_init_timer(&p_ptr->timer, (Handler)port_timeout, ref);
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INIT_LIST_HEAD(&p_ptr->publications);
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INIT_LIST_HEAD(&p_ptr->port_list);
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/*
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* Must hold port list lock while initializing message header template
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* to ensure a change to node's own network address doesn't result
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* in template containing out-dated network address information
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*/
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spin_lock_bh(&tipc_port_list_lock);
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msg = &p_ptr->phdr;
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tipc_msg_init(msg, importance, TIPC_NAMED_MSG, NAMED_H_SIZE, 0);
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msg_set_origport(msg, ref);
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list_add_tail(&p_ptr->port_list, &ports);
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spin_unlock_bh(&tipc_port_list_lock);
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return ref;
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}
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void tipc_port_destroy(struct tipc_port *p_ptr)
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{
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struct sk_buff *buf = NULL;
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struct tipc_msg *msg = NULL;
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u32 peer;
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tipc_withdraw(p_ptr, 0, NULL);
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spin_lock_bh(p_ptr->lock);
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tipc_ref_discard(p_ptr->ref);
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spin_unlock_bh(p_ptr->lock);
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k_cancel_timer(&p_ptr->timer);
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if (p_ptr->connected) {
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buf = port_build_peer_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
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tipc_nodesub_unsubscribe(&p_ptr->subscription);
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msg = buf_msg(buf);
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peer = msg_destnode(msg);
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tipc_link_xmit(buf, peer, msg_link_selector(msg));
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}
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spin_lock_bh(&tipc_port_list_lock);
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list_del(&p_ptr->port_list);
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list_del(&p_ptr->wait_list);
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spin_unlock_bh(&tipc_port_list_lock);
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k_term_timer(&p_ptr->timer);
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}
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/*
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* port_build_proto_msg(): create connection protocol message for port
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*
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* On entry the port must be locked and connected.
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*/
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static struct sk_buff *port_build_proto_msg(struct tipc_port *p_ptr,
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u32 type, u32 ack)
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{
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struct sk_buff *buf;
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struct tipc_msg *msg;
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buf = tipc_buf_acquire(INT_H_SIZE);
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if (buf) {
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msg = buf_msg(buf);
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tipc_msg_init(msg, CONN_MANAGER, type, INT_H_SIZE,
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tipc_port_peernode(p_ptr));
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msg_set_destport(msg, tipc_port_peerport(p_ptr));
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msg_set_origport(msg, p_ptr->ref);
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msg_set_msgcnt(msg, ack);
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buf->next = NULL;
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}
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return buf;
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}
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static void port_timeout(unsigned long ref)
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{
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struct tipc_port *p_ptr = tipc_port_lock(ref);
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struct sk_buff *buf = NULL;
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struct tipc_msg *msg = NULL;
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if (!p_ptr)
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return;
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if (!p_ptr->connected) {
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tipc_port_unlock(p_ptr);
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return;
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}
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/* Last probe answered ? */
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if (p_ptr->probing_state == TIPC_CONN_PROBING) {
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buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
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} else {
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buf = port_build_proto_msg(p_ptr, CONN_PROBE, 0);
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p_ptr->probing_state = TIPC_CONN_PROBING;
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k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
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}
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tipc_port_unlock(p_ptr);
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msg = buf_msg(buf);
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tipc_link_xmit(buf, msg_destnode(msg), msg_link_selector(msg));
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}
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static void port_handle_node_down(unsigned long ref)
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{
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struct tipc_port *p_ptr = tipc_port_lock(ref);
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struct sk_buff *buf = NULL;
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struct tipc_msg *msg = NULL;
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if (!p_ptr)
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return;
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buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_NODE);
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tipc_port_unlock(p_ptr);
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msg = buf_msg(buf);
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tipc_link_xmit(buf, msg_destnode(msg), msg_link_selector(msg));
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}
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static struct sk_buff *port_build_self_abort_msg(struct tipc_port *p_ptr, u32 err)
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{
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struct sk_buff *buf = port_build_peer_abort_msg(p_ptr, err);
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if (buf) {
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struct tipc_msg *msg = buf_msg(buf);
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msg_swap_words(msg, 4, 5);
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msg_swap_words(msg, 6, 7);
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buf->next = NULL;
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}
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return buf;
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}
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static struct sk_buff *port_build_peer_abort_msg(struct tipc_port *p_ptr, u32 err)
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{
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struct sk_buff *buf;
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struct tipc_msg *msg;
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u32 imp;
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if (!p_ptr->connected)
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return NULL;
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buf = tipc_buf_acquire(BASIC_H_SIZE);
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if (buf) {
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msg = buf_msg(buf);
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memcpy(msg, &p_ptr->phdr, BASIC_H_SIZE);
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msg_set_hdr_sz(msg, BASIC_H_SIZE);
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msg_set_size(msg, BASIC_H_SIZE);
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imp = msg_importance(msg);
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if (imp < TIPC_CRITICAL_IMPORTANCE)
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msg_set_importance(msg, ++imp);
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msg_set_errcode(msg, err);
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buf->next = NULL;
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}
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return buf;
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}
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static int port_print(struct tipc_port *p_ptr, char *buf, int len, int full_id)
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{
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struct publication *publ;
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int ret;
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if (full_id)
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ret = tipc_snprintf(buf, len, "<%u.%u.%u:%u>:",
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tipc_zone(tipc_own_addr),
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tipc_cluster(tipc_own_addr),
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tipc_node(tipc_own_addr), p_ptr->ref);
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else
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ret = tipc_snprintf(buf, len, "%-10u:", p_ptr->ref);
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if (p_ptr->connected) {
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u32 dport = tipc_port_peerport(p_ptr);
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u32 destnode = tipc_port_peernode(p_ptr);
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ret += tipc_snprintf(buf + ret, len - ret,
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" connected to <%u.%u.%u:%u>",
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tipc_zone(destnode),
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tipc_cluster(destnode),
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tipc_node(destnode), dport);
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if (p_ptr->conn_type != 0)
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ret += tipc_snprintf(buf + ret, len - ret,
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" via {%u,%u}", p_ptr->conn_type,
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p_ptr->conn_instance);
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} else if (p_ptr->published) {
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ret += tipc_snprintf(buf + ret, len - ret, " bound to");
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list_for_each_entry(publ, &p_ptr->publications, pport_list) {
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if (publ->lower == publ->upper)
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ret += tipc_snprintf(buf + ret, len - ret,
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" {%u,%u}", publ->type,
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publ->lower);
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else
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ret += tipc_snprintf(buf + ret, len - ret,
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" {%u,%u,%u}", publ->type,
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publ->lower, publ->upper);
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}
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}
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ret += tipc_snprintf(buf + ret, len - ret, "\n");
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return ret;
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}
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struct sk_buff *tipc_port_get_ports(void)
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{
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struct sk_buff *buf;
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struct tlv_desc *rep_tlv;
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char *pb;
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int pb_len;
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struct tipc_port *p_ptr;
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int str_len = 0;
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buf = tipc_cfg_reply_alloc(TLV_SPACE(ULTRA_STRING_MAX_LEN));
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if (!buf)
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return NULL;
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rep_tlv = (struct tlv_desc *)buf->data;
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pb = TLV_DATA(rep_tlv);
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pb_len = ULTRA_STRING_MAX_LEN;
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spin_lock_bh(&tipc_port_list_lock);
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list_for_each_entry(p_ptr, &ports, port_list) {
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spin_lock_bh(p_ptr->lock);
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str_len += port_print(p_ptr, pb, pb_len, 0);
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spin_unlock_bh(p_ptr->lock);
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}
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spin_unlock_bh(&tipc_port_list_lock);
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str_len += 1; /* for "\0" */
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skb_put(buf, TLV_SPACE(str_len));
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TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
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return buf;
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}
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void tipc_port_reinit(void)
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{
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struct tipc_port *p_ptr;
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struct tipc_msg *msg;
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spin_lock_bh(&tipc_port_list_lock);
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list_for_each_entry(p_ptr, &ports, port_list) {
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msg = &p_ptr->phdr;
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msg_set_prevnode(msg, tipc_own_addr);
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msg_set_orignode(msg, tipc_own_addr);
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}
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spin_unlock_bh(&tipc_port_list_lock);
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}
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void tipc_acknowledge(u32 ref, u32 ack)
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{
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struct tipc_port *p_ptr;
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struct sk_buff *buf = NULL;
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struct tipc_msg *msg;
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p_ptr = tipc_port_lock(ref);
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if (!p_ptr)
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return;
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if (p_ptr->connected)
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buf = port_build_proto_msg(p_ptr, CONN_ACK, ack);
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tipc_port_unlock(p_ptr);
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if (!buf)
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return;
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msg = buf_msg(buf);
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tipc_link_xmit(buf, msg_destnode(msg), msg_link_selector(msg));
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}
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int tipc_publish(struct tipc_port *p_ptr, unsigned int scope,
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struct tipc_name_seq const *seq)
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{
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struct publication *publ;
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u32 key;
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if (p_ptr->connected)
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return -EINVAL;
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key = p_ptr->ref + p_ptr->pub_count + 1;
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if (key == p_ptr->ref)
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return -EADDRINUSE;
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publ = tipc_nametbl_publish(seq->type, seq->lower, seq->upper,
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scope, p_ptr->ref, key);
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if (publ) {
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list_add(&publ->pport_list, &p_ptr->publications);
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p_ptr->pub_count++;
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p_ptr->published = 1;
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return 0;
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}
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return -EINVAL;
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}
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int tipc_withdraw(struct tipc_port *p_ptr, unsigned int scope,
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struct tipc_name_seq const *seq)
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{
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struct publication *publ;
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struct publication *tpubl;
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int res = -EINVAL;
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if (!seq) {
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list_for_each_entry_safe(publ, tpubl,
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&p_ptr->publications, pport_list) {
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tipc_nametbl_withdraw(publ->type, publ->lower,
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publ->ref, publ->key);
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}
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res = 0;
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} else {
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list_for_each_entry_safe(publ, tpubl,
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&p_ptr->publications, pport_list) {
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if (publ->scope != scope)
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continue;
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if (publ->type != seq->type)
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continue;
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if (publ->lower != seq->lower)
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continue;
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if (publ->upper != seq->upper)
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break;
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tipc_nametbl_withdraw(publ->type, publ->lower,
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publ->ref, publ->key);
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res = 0;
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break;
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}
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}
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if (list_empty(&p_ptr->publications))
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p_ptr->published = 0;
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return res;
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}
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int tipc_port_connect(u32 ref, struct tipc_portid const *peer)
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{
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struct tipc_port *p_ptr;
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int res;
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p_ptr = tipc_port_lock(ref);
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if (!p_ptr)
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return -EINVAL;
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res = __tipc_port_connect(ref, p_ptr, peer);
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tipc_port_unlock(p_ptr);
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return res;
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}
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/*
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* __tipc_port_connect - connect to a remote peer
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*
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* Port must be locked.
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*/
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int __tipc_port_connect(u32 ref, struct tipc_port *p_ptr,
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struct tipc_portid const *peer)
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{
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struct tipc_msg *msg;
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int res = -EINVAL;
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if (p_ptr->published || p_ptr->connected)
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goto exit;
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if (!peer->ref)
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goto exit;
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msg = &p_ptr->phdr;
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msg_set_destnode(msg, peer->node);
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msg_set_destport(msg, peer->ref);
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msg_set_type(msg, TIPC_CONN_MSG);
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msg_set_lookup_scope(msg, 0);
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msg_set_hdr_sz(msg, SHORT_H_SIZE);
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p_ptr->probing_interval = PROBING_INTERVAL;
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p_ptr->probing_state = TIPC_CONN_OK;
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p_ptr->connected = 1;
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k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
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tipc_nodesub_subscribe(&p_ptr->subscription, peer->node,
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(void *)(unsigned long)ref,
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(net_ev_handler)port_handle_node_down);
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res = 0;
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exit:
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p_ptr->max_pkt = tipc_node_get_mtu(peer->node, ref);
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return res;
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}
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/*
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* __tipc_disconnect - disconnect port from peer
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*
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* Port must be locked.
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*/
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int __tipc_port_disconnect(struct tipc_port *tp_ptr)
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{
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if (tp_ptr->connected) {
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tp_ptr->connected = 0;
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/* let timer expire on it's own to avoid deadlock! */
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tipc_nodesub_unsubscribe(&tp_ptr->subscription);
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return 0;
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}
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return -ENOTCONN;
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}
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/*
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* tipc_port_disconnect(): Disconnect port form peer.
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* This is a node local operation.
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*/
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int tipc_port_disconnect(u32 ref)
|
|
{
|
|
struct tipc_port *p_ptr;
|
|
int res;
|
|
|
|
p_ptr = tipc_port_lock(ref);
|
|
if (!p_ptr)
|
|
return -EINVAL;
|
|
res = __tipc_port_disconnect(p_ptr);
|
|
tipc_port_unlock(p_ptr);
|
|
return res;
|
|
}
|
|
|
|
/*
|
|
* tipc_port_shutdown(): Send a SHUTDOWN msg to peer and disconnect
|
|
*/
|
|
int tipc_port_shutdown(u32 ref)
|
|
{
|
|
struct tipc_msg *msg;
|
|
struct tipc_port *p_ptr;
|
|
struct sk_buff *buf = NULL;
|
|
|
|
p_ptr = tipc_port_lock(ref);
|
|
if (!p_ptr)
|
|
return -EINVAL;
|
|
|
|
buf = port_build_peer_abort_msg(p_ptr, TIPC_CONN_SHUTDOWN);
|
|
tipc_port_unlock(p_ptr);
|
|
msg = buf_msg(buf);
|
|
tipc_link_xmit(buf, msg_destnode(msg), msg_link_selector(msg));
|
|
return tipc_port_disconnect(ref);
|
|
}
|