![YOSHIFUJI Hideaki](/assets/img/avatar_default.png)
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
703 lines
19 KiB
C
703 lines
19 KiB
C
/*
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* net/tipc/config.c: TIPC configuration management code
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*
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* Copyright (c) 2002-2006, Ericsson AB
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* Copyright (c) 2004-2006, 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 "dbg.h"
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#include "bearer.h"
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#include "port.h"
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#include "link.h"
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#include "zone.h"
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#include "addr.h"
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#include "name_table.h"
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#include "node.h"
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#include "config.h"
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#include "discover.h"
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struct subscr_data {
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char usr_handle[8];
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u32 domain;
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u32 port_ref;
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struct list_head subd_list;
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};
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struct manager {
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u32 user_ref;
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u32 port_ref;
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u32 subscr_ref;
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u32 link_subscriptions;
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struct list_head link_subscribers;
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};
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static struct manager mng = { 0};
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static DEFINE_SPINLOCK(config_lock);
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static const void *req_tlv_area; /* request message TLV area */
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static int req_tlv_space; /* request message TLV area size */
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static int rep_headroom; /* reply message headroom to use */
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void tipc_cfg_link_event(u32 addr, char *name, int up)
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{
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/* TIPC DOESN'T HANDLE LINK EVENT SUBSCRIPTIONS AT THE MOMENT */
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}
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struct sk_buff *tipc_cfg_reply_alloc(int payload_size)
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{
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struct sk_buff *buf;
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buf = alloc_skb(rep_headroom + payload_size, GFP_ATOMIC);
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if (buf)
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skb_reserve(buf, rep_headroom);
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return buf;
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}
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int tipc_cfg_append_tlv(struct sk_buff *buf, int tlv_type,
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void *tlv_data, int tlv_data_size)
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{
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struct tlv_desc *tlv = (struct tlv_desc *)buf->tail;
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int new_tlv_space = TLV_SPACE(tlv_data_size);
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if (skb_tailroom(buf) < new_tlv_space) {
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dbg("tipc_cfg_append_tlv unable to append TLV\n");
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return 0;
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}
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skb_put(buf, new_tlv_space);
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tlv->tlv_type = htons(tlv_type);
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tlv->tlv_len = htons(TLV_LENGTH(tlv_data_size));
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if (tlv_data_size && tlv_data)
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memcpy(TLV_DATA(tlv), tlv_data, tlv_data_size);
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return 1;
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}
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struct sk_buff *tipc_cfg_reply_unsigned_type(u16 tlv_type, u32 value)
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{
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struct sk_buff *buf;
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__be32 value_net;
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buf = tipc_cfg_reply_alloc(TLV_SPACE(sizeof(value)));
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if (buf) {
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value_net = htonl(value);
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tipc_cfg_append_tlv(buf, tlv_type, &value_net,
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sizeof(value_net));
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}
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return buf;
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}
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struct sk_buff *tipc_cfg_reply_string_type(u16 tlv_type, char *string)
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{
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struct sk_buff *buf;
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int string_len = strlen(string) + 1;
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buf = tipc_cfg_reply_alloc(TLV_SPACE(string_len));
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if (buf)
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tipc_cfg_append_tlv(buf, tlv_type, string, string_len);
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return buf;
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}
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#if 0
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/* Now obsolete code for handling commands not yet implemented the new way */
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int tipc_cfg_cmd(const struct tipc_cmd_msg * msg,
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char *data,
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u32 sz,
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u32 *ret_size,
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struct tipc_portid *orig)
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{
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int rv = -EINVAL;
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u32 cmd = msg->cmd;
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*ret_size = 0;
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switch (cmd) {
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case TIPC_REMOVE_LINK:
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case TIPC_CMD_BLOCK_LINK:
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case TIPC_CMD_UNBLOCK_LINK:
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if (!cfg_check_connection(orig))
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rv = link_control(msg->argv.link_name, msg->cmd, 0);
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break;
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case TIPC_ESTABLISH:
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{
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int connected;
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tipc_isconnected(mng.conn_port_ref, &connected);
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if (connected || !orig) {
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rv = TIPC_FAILURE;
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break;
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}
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rv = tipc_connect2port(mng.conn_port_ref, orig);
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if (rv == TIPC_OK)
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orig = 0;
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break;
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}
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case TIPC_GET_PEER_ADDRESS:
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*ret_size = link_peer_addr(msg->argv.link_name, data, sz);
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break;
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case TIPC_GET_ROUTES:
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rv = TIPC_OK;
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break;
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default: {}
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}
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if (*ret_size)
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rv = TIPC_OK;
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return rv;
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}
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static void cfg_cmd_event(struct tipc_cmd_msg *msg,
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char *data,
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u32 sz,
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struct tipc_portid const *orig)
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{
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int rv = -EINVAL;
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struct tipc_cmd_result_msg rmsg;
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struct iovec msg_sect[2];
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int *arg;
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msg->cmd = ntohl(msg->cmd);
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cfg_prepare_res_msg(msg->cmd, msg->usr_handle, rv, &rmsg, msg_sect,
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data, 0);
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if (ntohl(msg->magic) != TIPC_MAGIC)
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goto exit;
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switch (msg->cmd) {
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case TIPC_CREATE_LINK:
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if (!cfg_check_connection(orig))
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rv = disc_create_link(&msg->argv.create_link);
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break;
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case TIPC_LINK_SUBSCRIBE:
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{
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struct subscr_data *sub;
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if (mng.link_subscriptions > 64)
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break;
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sub = kmalloc(sizeof(*sub),
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GFP_ATOMIC);
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if (sub == NULL) {
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warn("Memory squeeze; dropped remote link subscription\n");
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break;
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}
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INIT_LIST_HEAD(&sub->subd_list);
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tipc_createport(mng.user_ref,
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(void *)sub,
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TIPC_HIGH_IMPORTANCE,
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0,
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0,
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(tipc_conn_shutdown_event)cfg_linksubscr_cancel,
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0,
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0,
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(tipc_conn_msg_event)cfg_linksubscr_cancel,
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0,
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&sub->port_ref);
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if (!sub->port_ref) {
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kfree(sub);
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break;
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}
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memcpy(sub->usr_handle,msg->usr_handle,
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sizeof(sub->usr_handle));
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sub->domain = msg->argv.domain;
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list_add_tail(&sub->subd_list, &mng.link_subscribers);
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tipc_connect2port(sub->port_ref, orig);
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rmsg.retval = TIPC_OK;
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tipc_send(sub->port_ref, 2u, msg_sect);
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mng.link_subscriptions++;
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return;
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}
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default:
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rv = tipc_cfg_cmd(msg, data, sz, (u32 *)&msg_sect[1].iov_len, orig);
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}
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exit:
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rmsg.result_len = htonl(msg_sect[1].iov_len);
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rmsg.retval = htonl(rv);
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tipc_cfg_respond(msg_sect, 2u, orig);
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}
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#endif
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static struct sk_buff *cfg_enable_bearer(void)
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{
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struct tipc_bearer_config *args;
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if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_BEARER_CONFIG))
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return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
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args = (struct tipc_bearer_config *)TLV_DATA(req_tlv_area);
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if (tipc_enable_bearer(args->name,
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ntohl(args->detect_scope),
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ntohl(args->priority)))
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return tipc_cfg_reply_error_string("unable to enable bearer");
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return tipc_cfg_reply_none();
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}
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static struct sk_buff *cfg_disable_bearer(void)
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{
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if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_BEARER_NAME))
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return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
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if (tipc_disable_bearer((char *)TLV_DATA(req_tlv_area)))
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return tipc_cfg_reply_error_string("unable to disable bearer");
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return tipc_cfg_reply_none();
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}
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static struct sk_buff *cfg_set_own_addr(void)
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{
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u32 addr;
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if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_NET_ADDR))
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return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
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addr = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
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if (addr == tipc_own_addr)
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return tipc_cfg_reply_none();
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if (!tipc_addr_node_valid(addr))
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return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
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" (node address)");
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if (tipc_mode == TIPC_NET_MODE)
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return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
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" (cannot change node address once assigned)");
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tipc_own_addr = addr;
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/*
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* Must release all spinlocks before calling start_net() because
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* Linux version of TIPC calls eth_media_start() which calls
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* register_netdevice_notifier() which may block!
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*
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* Temporarily releasing the lock should be harmless for non-Linux TIPC,
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* but Linux version of eth_media_start() should really be reworked
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* so that it can be called with spinlocks held.
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*/
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spin_unlock_bh(&config_lock);
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tipc_core_start_net();
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spin_lock_bh(&config_lock);
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return tipc_cfg_reply_none();
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}
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static struct sk_buff *cfg_set_remote_mng(void)
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{
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u32 value;
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if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
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return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
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value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
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tipc_remote_management = (value != 0);
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return tipc_cfg_reply_none();
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}
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static struct sk_buff *cfg_set_max_publications(void)
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{
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u32 value;
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if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
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return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
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value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
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if (value != delimit(value, 1, 65535))
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return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
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" (max publications must be 1-65535)");
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tipc_max_publications = value;
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return tipc_cfg_reply_none();
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}
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static struct sk_buff *cfg_set_max_subscriptions(void)
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{
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u32 value;
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if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
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return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
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value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
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if (value != delimit(value, 1, 65535))
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return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
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" (max subscriptions must be 1-65535");
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tipc_max_subscriptions = value;
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return tipc_cfg_reply_none();
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}
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static struct sk_buff *cfg_set_max_ports(void)
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{
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u32 value;
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if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
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return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
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value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
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if (value == tipc_max_ports)
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return tipc_cfg_reply_none();
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if (value != delimit(value, 127, 65535))
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return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
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" (max ports must be 127-65535)");
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if (tipc_mode != TIPC_NOT_RUNNING)
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return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
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" (cannot change max ports while TIPC is active)");
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tipc_max_ports = value;
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return tipc_cfg_reply_none();
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}
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static struct sk_buff *cfg_set_max_zones(void)
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{
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u32 value;
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if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
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return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
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value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
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if (value == tipc_max_zones)
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return tipc_cfg_reply_none();
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if (value != delimit(value, 1, 255))
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return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
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" (max zones must be 1-255)");
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if (tipc_mode == TIPC_NET_MODE)
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return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
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" (cannot change max zones once TIPC has joined a network)");
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tipc_max_zones = value;
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return tipc_cfg_reply_none();
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}
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static struct sk_buff *cfg_set_max_clusters(void)
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{
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u32 value;
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if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
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return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
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value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
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if (value != delimit(value, 1, 1))
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return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
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" (max clusters fixed at 1)");
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return tipc_cfg_reply_none();
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}
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static struct sk_buff *cfg_set_max_nodes(void)
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{
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u32 value;
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if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
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return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
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value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
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if (value == tipc_max_nodes)
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return tipc_cfg_reply_none();
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if (value != delimit(value, 8, 2047))
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return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
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" (max nodes must be 8-2047)");
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if (tipc_mode == TIPC_NET_MODE)
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return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
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" (cannot change max nodes once TIPC has joined a network)");
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tipc_max_nodes = value;
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return tipc_cfg_reply_none();
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}
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static struct sk_buff *cfg_set_max_slaves(void)
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{
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u32 value;
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if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
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return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
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value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
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if (value != 0)
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return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
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" (max secondary nodes fixed at 0)");
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return tipc_cfg_reply_none();
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}
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static struct sk_buff *cfg_set_netid(void)
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{
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u32 value;
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if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
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return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
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value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
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if (value == tipc_net_id)
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return tipc_cfg_reply_none();
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if (value != delimit(value, 1, 9999))
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return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
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" (network id must be 1-9999)");
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if (tipc_mode == TIPC_NET_MODE)
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return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
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" (cannot change network id once TIPC has joined a network)");
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tipc_net_id = value;
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return tipc_cfg_reply_none();
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}
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struct sk_buff *tipc_cfg_do_cmd(u32 orig_node, u16 cmd, const void *request_area,
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int request_space, int reply_headroom)
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{
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struct sk_buff *rep_tlv_buf;
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spin_lock_bh(&config_lock);
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/* Save request and reply details in a well-known location */
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req_tlv_area = request_area;
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req_tlv_space = request_space;
|
|
rep_headroom = reply_headroom;
|
|
|
|
/* Check command authorization */
|
|
|
|
if (likely(orig_node == tipc_own_addr)) {
|
|
/* command is permitted */
|
|
} else if (cmd >= 0x8000) {
|
|
rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
|
|
" (cannot be done remotely)");
|
|
goto exit;
|
|
} else if (!tipc_remote_management) {
|
|
rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NO_REMOTE);
|
|
goto exit;
|
|
}
|
|
else if (cmd >= 0x4000) {
|
|
u32 domain = 0;
|
|
|
|
if ((tipc_nametbl_translate(TIPC_ZM_SRV, 0, &domain) == 0) ||
|
|
(domain != orig_node)) {
|
|
rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_ZONE_MSTR);
|
|
goto exit;
|
|
}
|
|
}
|
|
|
|
/* Call appropriate processing routine */
|
|
|
|
switch (cmd) {
|
|
case TIPC_CMD_NOOP:
|
|
rep_tlv_buf = tipc_cfg_reply_none();
|
|
break;
|
|
case TIPC_CMD_GET_NODES:
|
|
rep_tlv_buf = tipc_node_get_nodes(req_tlv_area, req_tlv_space);
|
|
break;
|
|
case TIPC_CMD_GET_LINKS:
|
|
rep_tlv_buf = tipc_node_get_links(req_tlv_area, req_tlv_space);
|
|
break;
|
|
case TIPC_CMD_SHOW_LINK_STATS:
|
|
rep_tlv_buf = tipc_link_cmd_show_stats(req_tlv_area, req_tlv_space);
|
|
break;
|
|
case TIPC_CMD_RESET_LINK_STATS:
|
|
rep_tlv_buf = tipc_link_cmd_reset_stats(req_tlv_area, req_tlv_space);
|
|
break;
|
|
case TIPC_CMD_SHOW_NAME_TABLE:
|
|
rep_tlv_buf = tipc_nametbl_get(req_tlv_area, req_tlv_space);
|
|
break;
|
|
case TIPC_CMD_GET_BEARER_NAMES:
|
|
rep_tlv_buf = tipc_bearer_get_names();
|
|
break;
|
|
case TIPC_CMD_GET_MEDIA_NAMES:
|
|
rep_tlv_buf = tipc_media_get_names();
|
|
break;
|
|
case TIPC_CMD_SHOW_PORTS:
|
|
rep_tlv_buf = tipc_port_get_ports();
|
|
break;
|
|
#if 0
|
|
case TIPC_CMD_SHOW_PORT_STATS:
|
|
rep_tlv_buf = port_show_stats(req_tlv_area, req_tlv_space);
|
|
break;
|
|
case TIPC_CMD_RESET_PORT_STATS:
|
|
rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED);
|
|
break;
|
|
#endif
|
|
case TIPC_CMD_SET_LOG_SIZE:
|
|
rep_tlv_buf = tipc_log_resize(req_tlv_area, req_tlv_space);
|
|
break;
|
|
case TIPC_CMD_DUMP_LOG:
|
|
rep_tlv_buf = tipc_log_dump();
|
|
break;
|
|
case TIPC_CMD_SET_LINK_TOL:
|
|
case TIPC_CMD_SET_LINK_PRI:
|
|
case TIPC_CMD_SET_LINK_WINDOW:
|
|
rep_tlv_buf = tipc_link_cmd_config(req_tlv_area, req_tlv_space, cmd);
|
|
break;
|
|
case TIPC_CMD_ENABLE_BEARER:
|
|
rep_tlv_buf = cfg_enable_bearer();
|
|
break;
|
|
case TIPC_CMD_DISABLE_BEARER:
|
|
rep_tlv_buf = cfg_disable_bearer();
|
|
break;
|
|
case TIPC_CMD_SET_NODE_ADDR:
|
|
rep_tlv_buf = cfg_set_own_addr();
|
|
break;
|
|
case TIPC_CMD_SET_REMOTE_MNG:
|
|
rep_tlv_buf = cfg_set_remote_mng();
|
|
break;
|
|
case TIPC_CMD_SET_MAX_PORTS:
|
|
rep_tlv_buf = cfg_set_max_ports();
|
|
break;
|
|
case TIPC_CMD_SET_MAX_PUBL:
|
|
rep_tlv_buf = cfg_set_max_publications();
|
|
break;
|
|
case TIPC_CMD_SET_MAX_SUBSCR:
|
|
rep_tlv_buf = cfg_set_max_subscriptions();
|
|
break;
|
|
case TIPC_CMD_SET_MAX_ZONES:
|
|
rep_tlv_buf = cfg_set_max_zones();
|
|
break;
|
|
case TIPC_CMD_SET_MAX_CLUSTERS:
|
|
rep_tlv_buf = cfg_set_max_clusters();
|
|
break;
|
|
case TIPC_CMD_SET_MAX_NODES:
|
|
rep_tlv_buf = cfg_set_max_nodes();
|
|
break;
|
|
case TIPC_CMD_SET_MAX_SLAVES:
|
|
rep_tlv_buf = cfg_set_max_slaves();
|
|
break;
|
|
case TIPC_CMD_SET_NETID:
|
|
rep_tlv_buf = cfg_set_netid();
|
|
break;
|
|
case TIPC_CMD_GET_REMOTE_MNG:
|
|
rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_remote_management);
|
|
break;
|
|
case TIPC_CMD_GET_MAX_PORTS:
|
|
rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_ports);
|
|
break;
|
|
case TIPC_CMD_GET_MAX_PUBL:
|
|
rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_publications);
|
|
break;
|
|
case TIPC_CMD_GET_MAX_SUBSCR:
|
|
rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_subscriptions);
|
|
break;
|
|
case TIPC_CMD_GET_MAX_ZONES:
|
|
rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_zones);
|
|
break;
|
|
case TIPC_CMD_GET_MAX_CLUSTERS:
|
|
rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_clusters);
|
|
break;
|
|
case TIPC_CMD_GET_MAX_NODES:
|
|
rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_nodes);
|
|
break;
|
|
case TIPC_CMD_GET_MAX_SLAVES:
|
|
rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_slaves);
|
|
break;
|
|
case TIPC_CMD_GET_NETID:
|
|
rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_net_id);
|
|
break;
|
|
default:
|
|
rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
|
|
" (unknown command)");
|
|
break;
|
|
}
|
|
|
|
/* Return reply buffer */
|
|
exit:
|
|
spin_unlock_bh(&config_lock);
|
|
return rep_tlv_buf;
|
|
}
|
|
|
|
static void cfg_named_msg_event(void *userdata,
|
|
u32 port_ref,
|
|
struct sk_buff **buf,
|
|
const unchar *msg,
|
|
u32 size,
|
|
u32 importance,
|
|
struct tipc_portid const *orig,
|
|
struct tipc_name_seq const *dest)
|
|
{
|
|
struct tipc_cfg_msg_hdr *req_hdr;
|
|
struct tipc_cfg_msg_hdr *rep_hdr;
|
|
struct sk_buff *rep_buf;
|
|
|
|
/* Validate configuration message header (ignore invalid message) */
|
|
|
|
req_hdr = (struct tipc_cfg_msg_hdr *)msg;
|
|
if ((size < sizeof(*req_hdr)) ||
|
|
(size != TCM_ALIGN(ntohl(req_hdr->tcm_len))) ||
|
|
(ntohs(req_hdr->tcm_flags) != TCM_F_REQUEST)) {
|
|
warn("Invalid configuration message discarded\n");
|
|
return;
|
|
}
|
|
|
|
/* Generate reply for request (if can't, return request) */
|
|
|
|
rep_buf = tipc_cfg_do_cmd(orig->node,
|
|
ntohs(req_hdr->tcm_type),
|
|
msg + sizeof(*req_hdr),
|
|
size - sizeof(*req_hdr),
|
|
BUF_HEADROOM + MAX_H_SIZE + sizeof(*rep_hdr));
|
|
if (rep_buf) {
|
|
skb_push(rep_buf, sizeof(*rep_hdr));
|
|
rep_hdr = (struct tipc_cfg_msg_hdr *)rep_buf->data;
|
|
memcpy(rep_hdr, req_hdr, sizeof(*rep_hdr));
|
|
rep_hdr->tcm_len = htonl(rep_buf->len);
|
|
rep_hdr->tcm_flags &= htons(~TCM_F_REQUEST);
|
|
} else {
|
|
rep_buf = *buf;
|
|
*buf = NULL;
|
|
}
|
|
|
|
/* NEED TO ADD CODE TO HANDLE FAILED SEND (SUCH AS CONGESTION) */
|
|
tipc_send_buf2port(port_ref, orig, rep_buf, rep_buf->len);
|
|
}
|
|
|
|
int tipc_cfg_init(void)
|
|
{
|
|
struct tipc_name_seq seq;
|
|
int res;
|
|
|
|
memset(&mng, 0, sizeof(mng));
|
|
INIT_LIST_HEAD(&mng.link_subscribers);
|
|
|
|
res = tipc_attach(&mng.user_ref, NULL, NULL);
|
|
if (res)
|
|
goto failed;
|
|
|
|
res = tipc_createport(mng.user_ref, NULL, TIPC_CRITICAL_IMPORTANCE,
|
|
NULL, NULL, NULL,
|
|
NULL, cfg_named_msg_event, NULL,
|
|
NULL, &mng.port_ref);
|
|
if (res)
|
|
goto failed;
|
|
|
|
seq.type = TIPC_CFG_SRV;
|
|
seq.lower = seq.upper = tipc_own_addr;
|
|
res = tipc_nametbl_publish_rsv(mng.port_ref, TIPC_ZONE_SCOPE, &seq);
|
|
if (res)
|
|
goto failed;
|
|
|
|
return 0;
|
|
|
|
failed:
|
|
err("Unable to create configuration service\n");
|
|
tipc_detach(mng.user_ref);
|
|
mng.user_ref = 0;
|
|
return res;
|
|
}
|
|
|
|
void tipc_cfg_stop(void)
|
|
{
|
|
if (mng.user_ref) {
|
|
tipc_detach(mng.user_ref);
|
|
mng.user_ref = 0;
|
|
}
|
|
}
|