mirror of https://gitee.com/openkylin/linux.git
1305 lines
31 KiB
C
1305 lines
31 KiB
C
/*
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* net/tipc/bearer.c: TIPC bearer code
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*
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* Copyright (c) 1996-2006, 2013-2016, Ericsson AB
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* Copyright (c) 2004-2006, 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 <net/sock.h>
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#include "core.h"
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#include "bearer.h"
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#include "link.h"
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#include "discover.h"
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#include "monitor.h"
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#include "bcast.h"
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#include "netlink.h"
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#include "udp_media.h"
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#include "trace.h"
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#include "crypto.h"
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#define MAX_ADDR_STR 60
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static struct tipc_media * const media_info_array[] = {
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ð_media_info,
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#ifdef CONFIG_TIPC_MEDIA_IB
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&ib_media_info,
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#endif
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#ifdef CONFIG_TIPC_MEDIA_UDP
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&udp_media_info,
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#endif
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NULL
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};
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static struct tipc_bearer *bearer_get(struct net *net, int bearer_id)
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{
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struct tipc_net *tn = tipc_net(net);
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return rcu_dereference(tn->bearer_list[bearer_id]);
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}
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static void bearer_disable(struct net *net, struct tipc_bearer *b);
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static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev,
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struct packet_type *pt, struct net_device *orig_dev);
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/**
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* tipc_media_find - locates specified media object by name
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*/
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struct tipc_media *tipc_media_find(const char *name)
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{
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u32 i;
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for (i = 0; media_info_array[i] != NULL; i++) {
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if (!strcmp(media_info_array[i]->name, name))
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break;
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}
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return media_info_array[i];
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}
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/**
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* media_find_id - locates specified media object by type identifier
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*/
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static struct tipc_media *media_find_id(u8 type)
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{
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u32 i;
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for (i = 0; media_info_array[i] != NULL; i++) {
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if (media_info_array[i]->type_id == type)
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break;
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}
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return media_info_array[i];
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}
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/**
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* tipc_media_addr_printf - record media address in print buffer
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*/
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int tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a)
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{
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char addr_str[MAX_ADDR_STR];
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struct tipc_media *m;
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int ret;
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m = media_find_id(a->media_id);
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if (m && !m->addr2str(a, addr_str, sizeof(addr_str)))
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ret = scnprintf(buf, len, "%s(%s)", m->name, addr_str);
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else {
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u32 i;
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ret = scnprintf(buf, len, "UNKNOWN(%u)", a->media_id);
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for (i = 0; i < sizeof(a->value); i++)
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ret += scnprintf(buf + ret, len - ret,
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"-%x", a->value[i]);
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}
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return ret;
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}
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/**
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* bearer_name_validate - validate & (optionally) deconstruct bearer name
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* @name: ptr to bearer name string
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* @name_parts: ptr to area for bearer name components (or NULL if not needed)
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*
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* Returns 1 if bearer name is valid, otherwise 0.
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*/
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static int bearer_name_validate(const char *name,
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struct tipc_bearer_names *name_parts)
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{
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char name_copy[TIPC_MAX_BEARER_NAME];
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char *media_name;
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char *if_name;
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u32 media_len;
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u32 if_len;
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/* copy bearer name & ensure length is OK */
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name_copy[TIPC_MAX_BEARER_NAME - 1] = 0;
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/* need above in case non-Posix strncpy() doesn't pad with nulls */
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strncpy(name_copy, name, TIPC_MAX_BEARER_NAME);
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if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0)
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return 0;
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/* ensure all component parts of bearer name are present */
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media_name = name_copy;
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if_name = strchr(media_name, ':');
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if (if_name == NULL)
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return 0;
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*(if_name++) = 0;
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media_len = if_name - media_name;
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if_len = strlen(if_name) + 1;
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/* validate component parts of bearer name */
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if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) ||
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(if_len <= 1) || (if_len > TIPC_MAX_IF_NAME))
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return 0;
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/* return bearer name components, if necessary */
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if (name_parts) {
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strcpy(name_parts->media_name, media_name);
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strcpy(name_parts->if_name, if_name);
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}
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return 1;
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}
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/**
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* tipc_bearer_find - locates bearer object with matching bearer name
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*/
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struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name)
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{
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struct tipc_net *tn = net_generic(net, tipc_net_id);
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struct tipc_bearer *b;
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u32 i;
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for (i = 0; i < MAX_BEARERS; i++) {
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b = rtnl_dereference(tn->bearer_list[i]);
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if (b && (!strcmp(b->name, name)))
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return b;
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}
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return NULL;
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}
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/* tipc_bearer_get_name - get the bearer name from its id.
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* @net: network namespace
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* @name: a pointer to the buffer where the name will be stored.
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* @bearer_id: the id to get the name from.
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*/
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int tipc_bearer_get_name(struct net *net, char *name, u32 bearer_id)
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{
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struct tipc_net *tn = tipc_net(net);
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struct tipc_bearer *b;
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if (bearer_id >= MAX_BEARERS)
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return -EINVAL;
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b = rtnl_dereference(tn->bearer_list[bearer_id]);
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if (!b)
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return -EINVAL;
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strcpy(name, b->name);
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return 0;
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}
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void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest)
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{
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struct tipc_net *tn = net_generic(net, tipc_net_id);
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struct tipc_bearer *b;
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rcu_read_lock();
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b = rcu_dereference(tn->bearer_list[bearer_id]);
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if (b)
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tipc_disc_add_dest(b->disc);
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rcu_read_unlock();
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}
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void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest)
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{
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struct tipc_net *tn = net_generic(net, tipc_net_id);
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struct tipc_bearer *b;
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rcu_read_lock();
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b = rcu_dereference(tn->bearer_list[bearer_id]);
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if (b)
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tipc_disc_remove_dest(b->disc);
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rcu_read_unlock();
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}
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/**
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* tipc_enable_bearer - enable bearer with the given name
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*/
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static int tipc_enable_bearer(struct net *net, const char *name,
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u32 disc_domain, u32 prio,
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struct nlattr *attr[])
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{
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struct tipc_net *tn = tipc_net(net);
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struct tipc_bearer_names b_names;
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int with_this_prio = 1;
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struct tipc_bearer *b;
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struct tipc_media *m;
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struct sk_buff *skb;
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int bearer_id = 0;
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int res = -EINVAL;
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char *errstr = "";
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if (!bearer_name_validate(name, &b_names)) {
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errstr = "illegal name";
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goto rejected;
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}
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if (prio > TIPC_MAX_LINK_PRI && prio != TIPC_MEDIA_LINK_PRI) {
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errstr = "illegal priority";
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goto rejected;
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}
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m = tipc_media_find(b_names.media_name);
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if (!m) {
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errstr = "media not registered";
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goto rejected;
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}
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if (prio == TIPC_MEDIA_LINK_PRI)
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prio = m->priority;
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/* Check new bearer vs existing ones and find free bearer id if any */
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while (bearer_id < MAX_BEARERS) {
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b = rtnl_dereference(tn->bearer_list[bearer_id]);
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if (!b)
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break;
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if (!strcmp(name, b->name)) {
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errstr = "already enabled";
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goto rejected;
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}
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bearer_id++;
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if (b->priority != prio)
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continue;
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if (++with_this_prio <= 2)
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continue;
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pr_warn("Bearer <%s>: already 2 bearers with priority %u\n",
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name, prio);
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if (prio == TIPC_MIN_LINK_PRI) {
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errstr = "cannot adjust to lower";
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goto rejected;
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}
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pr_warn("Bearer <%s>: trying with adjusted priority\n", name);
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prio--;
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bearer_id = 0;
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with_this_prio = 1;
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}
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if (bearer_id >= MAX_BEARERS) {
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errstr = "max 3 bearers permitted";
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goto rejected;
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}
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b = kzalloc(sizeof(*b), GFP_ATOMIC);
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if (!b)
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return -ENOMEM;
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strcpy(b->name, name);
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b->media = m;
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res = m->enable_media(net, b, attr);
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if (res) {
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kfree(b);
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errstr = "failed to enable media";
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goto rejected;
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}
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b->identity = bearer_id;
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b->tolerance = m->tolerance;
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b->min_win = m->min_win;
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b->max_win = m->max_win;
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b->domain = disc_domain;
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b->net_plane = bearer_id + 'A';
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b->priority = prio;
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refcount_set(&b->refcnt, 1);
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res = tipc_disc_create(net, b, &b->bcast_addr, &skb);
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if (res) {
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bearer_disable(net, b);
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errstr = "failed to create discoverer";
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goto rejected;
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}
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test_and_set_bit_lock(0, &b->up);
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rcu_assign_pointer(tn->bearer_list[bearer_id], b);
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if (skb)
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tipc_bearer_xmit_skb(net, bearer_id, skb, &b->bcast_addr);
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if (tipc_mon_create(net, bearer_id)) {
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bearer_disable(net, b);
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return -ENOMEM;
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}
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pr_info("Enabled bearer <%s>, priority %u\n", name, prio);
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return res;
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rejected:
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pr_warn("Enabling of bearer <%s> rejected, %s\n", name, errstr);
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return res;
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}
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/**
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* tipc_reset_bearer - Reset all links established over this bearer
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*/
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static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b)
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{
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pr_info("Resetting bearer <%s>\n", b->name);
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tipc_node_delete_links(net, b->identity);
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tipc_disc_reset(net, b);
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return 0;
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}
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bool tipc_bearer_hold(struct tipc_bearer *b)
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{
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return (b && refcount_inc_not_zero(&b->refcnt));
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}
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void tipc_bearer_put(struct tipc_bearer *b)
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{
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if (b && refcount_dec_and_test(&b->refcnt))
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kfree_rcu(b, rcu);
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}
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/**
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* bearer_disable
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*
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* Note: This routine assumes caller holds RTNL lock.
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*/
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static void bearer_disable(struct net *net, struct tipc_bearer *b)
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{
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struct tipc_net *tn = tipc_net(net);
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int bearer_id = b->identity;
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pr_info("Disabling bearer <%s>\n", b->name);
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clear_bit_unlock(0, &b->up);
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tipc_node_delete_links(net, bearer_id);
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b->media->disable_media(b);
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RCU_INIT_POINTER(b->media_ptr, NULL);
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if (b->disc)
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tipc_disc_delete(b->disc);
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RCU_INIT_POINTER(tn->bearer_list[bearer_id], NULL);
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tipc_bearer_put(b);
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tipc_mon_delete(net, bearer_id);
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}
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int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b,
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struct nlattr *attr[])
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{
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char *dev_name = strchr((const char *)b->name, ':') + 1;
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int hwaddr_len = b->media->hwaddr_len;
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u8 node_id[NODE_ID_LEN] = {0,};
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struct net_device *dev;
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/* Find device with specified name */
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dev = dev_get_by_name(net, dev_name);
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if (!dev)
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return -ENODEV;
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if (tipc_mtu_bad(dev, 0)) {
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dev_put(dev);
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return -EINVAL;
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}
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if (dev == net->loopback_dev) {
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dev_put(dev);
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pr_info("Enabling <%s> not permitted\n", b->name);
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return -EINVAL;
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}
|
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|
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/* Autoconfigure own node identity if needed */
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if (!tipc_own_id(net) && hwaddr_len <= NODE_ID_LEN) {
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memcpy(node_id, dev->dev_addr, hwaddr_len);
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tipc_net_init(net, node_id, 0);
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}
|
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if (!tipc_own_id(net)) {
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dev_put(dev);
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pr_warn("Failed to obtain node identity\n");
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return -EINVAL;
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}
|
|
|
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/* Associate TIPC bearer with L2 bearer */
|
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rcu_assign_pointer(b->media_ptr, dev);
|
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b->pt.dev = dev;
|
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b->pt.type = htons(ETH_P_TIPC);
|
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b->pt.func = tipc_l2_rcv_msg;
|
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dev_add_pack(&b->pt);
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memset(&b->bcast_addr, 0, sizeof(b->bcast_addr));
|
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memcpy(b->bcast_addr.value, dev->broadcast, hwaddr_len);
|
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b->bcast_addr.media_id = b->media->type_id;
|
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b->bcast_addr.broadcast = TIPC_BROADCAST_SUPPORT;
|
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b->mtu = dev->mtu;
|
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b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr);
|
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rcu_assign_pointer(dev->tipc_ptr, b);
|
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return 0;
|
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}
|
|
|
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/* tipc_disable_l2_media - detach TIPC bearer from an L2 interface
|
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*
|
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* Mark L2 bearer as inactive so that incoming buffers are thrown away
|
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*/
|
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void tipc_disable_l2_media(struct tipc_bearer *b)
|
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{
|
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struct net_device *dev;
|
|
|
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dev = (struct net_device *)rtnl_dereference(b->media_ptr);
|
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dev_remove_pack(&b->pt);
|
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RCU_INIT_POINTER(dev->tipc_ptr, NULL);
|
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synchronize_net();
|
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dev_put(dev);
|
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}
|
|
|
|
/**
|
|
* tipc_l2_send_msg - send a TIPC packet out over an L2 interface
|
|
* @skb: the packet to be sent
|
|
* @b: the bearer through which the packet is to be sent
|
|
* @dest: peer destination address
|
|
*/
|
|
int tipc_l2_send_msg(struct net *net, struct sk_buff *skb,
|
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struct tipc_bearer *b, struct tipc_media_addr *dest)
|
|
{
|
|
struct net_device *dev;
|
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int delta;
|
|
|
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dev = (struct net_device *)rcu_dereference(b->media_ptr);
|
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if (!dev)
|
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return 0;
|
|
|
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delta = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb));
|
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if ((delta > 0) && pskb_expand_head(skb, delta, 0, GFP_ATOMIC)) {
|
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kfree_skb(skb);
|
|
return 0;
|
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}
|
|
skb_reset_network_header(skb);
|
|
skb->dev = dev;
|
|
skb->protocol = htons(ETH_P_TIPC);
|
|
dev_hard_header(skb, dev, ETH_P_TIPC, dest->value,
|
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dev->dev_addr, skb->len);
|
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dev_queue_xmit(skb);
|
|
return 0;
|
|
}
|
|
|
|
bool tipc_bearer_bcast_support(struct net *net, u32 bearer_id)
|
|
{
|
|
bool supp = false;
|
|
struct tipc_bearer *b;
|
|
|
|
rcu_read_lock();
|
|
b = bearer_get(net, bearer_id);
|
|
if (b)
|
|
supp = (b->bcast_addr.broadcast == TIPC_BROADCAST_SUPPORT);
|
|
rcu_read_unlock();
|
|
return supp;
|
|
}
|
|
|
|
int tipc_bearer_mtu(struct net *net, u32 bearer_id)
|
|
{
|
|
int mtu = 0;
|
|
struct tipc_bearer *b;
|
|
|
|
rcu_read_lock();
|
|
b = rcu_dereference(tipc_net(net)->bearer_list[bearer_id]);
|
|
if (b)
|
|
mtu = b->mtu;
|
|
rcu_read_unlock();
|
|
return mtu;
|
|
}
|
|
|
|
/* tipc_bearer_xmit_skb - sends buffer to destination over bearer
|
|
*/
|
|
void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id,
|
|
struct sk_buff *skb,
|
|
struct tipc_media_addr *dest)
|
|
{
|
|
struct tipc_msg *hdr = buf_msg(skb);
|
|
struct tipc_bearer *b;
|
|
|
|
rcu_read_lock();
|
|
b = bearer_get(net, bearer_id);
|
|
if (likely(b && (test_bit(0, &b->up) || msg_is_reset(hdr)))) {
|
|
#ifdef CONFIG_TIPC_CRYPTO
|
|
tipc_crypto_xmit(net, &skb, b, dest, NULL);
|
|
if (skb)
|
|
#endif
|
|
b->media->send_msg(net, skb, b, dest);
|
|
} else {
|
|
kfree_skb(skb);
|
|
}
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
/* tipc_bearer_xmit() -send buffer to destination over bearer
|
|
*/
|
|
void tipc_bearer_xmit(struct net *net, u32 bearer_id,
|
|
struct sk_buff_head *xmitq,
|
|
struct tipc_media_addr *dst,
|
|
struct tipc_node *__dnode)
|
|
{
|
|
struct tipc_bearer *b;
|
|
struct sk_buff *skb, *tmp;
|
|
|
|
if (skb_queue_empty(xmitq))
|
|
return;
|
|
|
|
rcu_read_lock();
|
|
b = bearer_get(net, bearer_id);
|
|
if (unlikely(!b))
|
|
__skb_queue_purge(xmitq);
|
|
skb_queue_walk_safe(xmitq, skb, tmp) {
|
|
__skb_dequeue(xmitq);
|
|
if (likely(test_bit(0, &b->up) || msg_is_reset(buf_msg(skb)))) {
|
|
#ifdef CONFIG_TIPC_CRYPTO
|
|
tipc_crypto_xmit(net, &skb, b, dst, __dnode);
|
|
if (skb)
|
|
#endif
|
|
b->media->send_msg(net, skb, b, dst);
|
|
} else {
|
|
kfree_skb(skb);
|
|
}
|
|
}
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
/* tipc_bearer_bc_xmit() - broadcast buffers to all destinations
|
|
*/
|
|
void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id,
|
|
struct sk_buff_head *xmitq)
|
|
{
|
|
struct tipc_net *tn = tipc_net(net);
|
|
struct tipc_media_addr *dst;
|
|
int net_id = tn->net_id;
|
|
struct tipc_bearer *b;
|
|
struct sk_buff *skb, *tmp;
|
|
struct tipc_msg *hdr;
|
|
|
|
rcu_read_lock();
|
|
b = bearer_get(net, bearer_id);
|
|
if (unlikely(!b || !test_bit(0, &b->up)))
|
|
__skb_queue_purge(xmitq);
|
|
skb_queue_walk_safe(xmitq, skb, tmp) {
|
|
hdr = buf_msg(skb);
|
|
msg_set_non_seq(hdr, 1);
|
|
msg_set_mc_netid(hdr, net_id);
|
|
__skb_dequeue(xmitq);
|
|
dst = &b->bcast_addr;
|
|
#ifdef CONFIG_TIPC_CRYPTO
|
|
tipc_crypto_xmit(net, &skb, b, dst, NULL);
|
|
if (skb)
|
|
#endif
|
|
b->media->send_msg(net, skb, b, dst);
|
|
}
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
/**
|
|
* tipc_l2_rcv_msg - handle incoming TIPC message from an interface
|
|
* @buf: the received packet
|
|
* @dev: the net device that the packet was received on
|
|
* @pt: the packet_type structure which was used to register this handler
|
|
* @orig_dev: the original receive net device in case the device is a bond
|
|
*
|
|
* Accept only packets explicitly sent to this node, or broadcast packets;
|
|
* ignores packets sent using interface multicast, and traffic sent to other
|
|
* nodes (which can happen if interface is running in promiscuous mode).
|
|
*/
|
|
static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev,
|
|
struct packet_type *pt, struct net_device *orig_dev)
|
|
{
|
|
struct tipc_bearer *b;
|
|
|
|
rcu_read_lock();
|
|
b = rcu_dereference(dev->tipc_ptr) ?:
|
|
rcu_dereference(orig_dev->tipc_ptr);
|
|
if (likely(b && test_bit(0, &b->up) &&
|
|
(skb->pkt_type <= PACKET_MULTICAST))) {
|
|
skb_mark_not_on_list(skb);
|
|
TIPC_SKB_CB(skb)->flags = 0;
|
|
tipc_rcv(dev_net(b->pt.dev), skb, b);
|
|
rcu_read_unlock();
|
|
return NET_RX_SUCCESS;
|
|
}
|
|
rcu_read_unlock();
|
|
kfree_skb(skb);
|
|
return NET_RX_DROP;
|
|
}
|
|
|
|
/**
|
|
* tipc_l2_device_event - handle device events from network device
|
|
* @nb: the context of the notification
|
|
* @evt: the type of event
|
|
* @ptr: the net device that the event was on
|
|
*
|
|
* This function is called by the Ethernet driver in case of link
|
|
* change event.
|
|
*/
|
|
static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt,
|
|
void *ptr)
|
|
{
|
|
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
|
|
struct net *net = dev_net(dev);
|
|
struct tipc_bearer *b;
|
|
|
|
b = rtnl_dereference(dev->tipc_ptr);
|
|
if (!b)
|
|
return NOTIFY_DONE;
|
|
|
|
trace_tipc_l2_device_event(dev, b, evt);
|
|
switch (evt) {
|
|
case NETDEV_CHANGE:
|
|
if (netif_carrier_ok(dev) && netif_oper_up(dev)) {
|
|
test_and_set_bit_lock(0, &b->up);
|
|
break;
|
|
}
|
|
/* fall through */
|
|
case NETDEV_GOING_DOWN:
|
|
clear_bit_unlock(0, &b->up);
|
|
tipc_reset_bearer(net, b);
|
|
break;
|
|
case NETDEV_UP:
|
|
test_and_set_bit_lock(0, &b->up);
|
|
break;
|
|
case NETDEV_CHANGEMTU:
|
|
if (tipc_mtu_bad(dev, 0)) {
|
|
bearer_disable(net, b);
|
|
break;
|
|
}
|
|
b->mtu = dev->mtu;
|
|
tipc_reset_bearer(net, b);
|
|
break;
|
|
case NETDEV_CHANGEADDR:
|
|
b->media->raw2addr(b, &b->addr,
|
|
(char *)dev->dev_addr);
|
|
tipc_reset_bearer(net, b);
|
|
break;
|
|
case NETDEV_UNREGISTER:
|
|
case NETDEV_CHANGENAME:
|
|
bearer_disable(net, b);
|
|
break;
|
|
}
|
|
return NOTIFY_OK;
|
|
}
|
|
|
|
static struct notifier_block notifier = {
|
|
.notifier_call = tipc_l2_device_event,
|
|
.priority = 0,
|
|
};
|
|
|
|
int tipc_bearer_setup(void)
|
|
{
|
|
return register_netdevice_notifier(¬ifier);
|
|
}
|
|
|
|
void tipc_bearer_cleanup(void)
|
|
{
|
|
unregister_netdevice_notifier(¬ifier);
|
|
}
|
|
|
|
void tipc_bearer_stop(struct net *net)
|
|
{
|
|
struct tipc_net *tn = net_generic(net, tipc_net_id);
|
|
struct tipc_bearer *b;
|
|
u32 i;
|
|
|
|
for (i = 0; i < MAX_BEARERS; i++) {
|
|
b = rtnl_dereference(tn->bearer_list[i]);
|
|
if (b) {
|
|
bearer_disable(net, b);
|
|
tn->bearer_list[i] = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
void tipc_clone_to_loopback(struct net *net, struct sk_buff_head *pkts)
|
|
{
|
|
struct net_device *dev = net->loopback_dev;
|
|
struct sk_buff *skb, *_skb;
|
|
int exp;
|
|
|
|
skb_queue_walk(pkts, _skb) {
|
|
skb = pskb_copy(_skb, GFP_ATOMIC);
|
|
if (!skb)
|
|
continue;
|
|
|
|
exp = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb));
|
|
if (exp > 0 && pskb_expand_head(skb, exp, 0, GFP_ATOMIC)) {
|
|
kfree_skb(skb);
|
|
continue;
|
|
}
|
|
|
|
skb_reset_network_header(skb);
|
|
dev_hard_header(skb, dev, ETH_P_TIPC, dev->dev_addr,
|
|
dev->dev_addr, skb->len);
|
|
skb->dev = dev;
|
|
skb->pkt_type = PACKET_HOST;
|
|
skb->ip_summed = CHECKSUM_UNNECESSARY;
|
|
skb->protocol = eth_type_trans(skb, dev);
|
|
netif_rx_ni(skb);
|
|
}
|
|
}
|
|
|
|
static int tipc_loopback_rcv_pkt(struct sk_buff *skb, struct net_device *dev,
|
|
struct packet_type *pt, struct net_device *od)
|
|
{
|
|
consume_skb(skb);
|
|
return NET_RX_SUCCESS;
|
|
}
|
|
|
|
int tipc_attach_loopback(struct net *net)
|
|
{
|
|
struct net_device *dev = net->loopback_dev;
|
|
struct tipc_net *tn = tipc_net(net);
|
|
|
|
if (!dev)
|
|
return -ENODEV;
|
|
|
|
dev_hold(dev);
|
|
tn->loopback_pt.dev = dev;
|
|
tn->loopback_pt.type = htons(ETH_P_TIPC);
|
|
tn->loopback_pt.func = tipc_loopback_rcv_pkt;
|
|
dev_add_pack(&tn->loopback_pt);
|
|
return 0;
|
|
}
|
|
|
|
void tipc_detach_loopback(struct net *net)
|
|
{
|
|
struct tipc_net *tn = tipc_net(net);
|
|
|
|
dev_remove_pack(&tn->loopback_pt);
|
|
dev_put(net->loopback_dev);
|
|
}
|
|
|
|
/* Caller should hold rtnl_lock to protect the bearer */
|
|
static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg,
|
|
struct tipc_bearer *bearer, int nlflags)
|
|
{
|
|
void *hdr;
|
|
struct nlattr *attrs;
|
|
struct nlattr *prop;
|
|
|
|
hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
|
|
nlflags, TIPC_NL_BEARER_GET);
|
|
if (!hdr)
|
|
return -EMSGSIZE;
|
|
|
|
attrs = nla_nest_start_noflag(msg->skb, TIPC_NLA_BEARER);
|
|
if (!attrs)
|
|
goto msg_full;
|
|
|
|
if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name))
|
|
goto attr_msg_full;
|
|
|
|
prop = nla_nest_start_noflag(msg->skb, TIPC_NLA_BEARER_PROP);
|
|
if (!prop)
|
|
goto prop_msg_full;
|
|
if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority))
|
|
goto prop_msg_full;
|
|
if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance))
|
|
goto prop_msg_full;
|
|
if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->max_win))
|
|
goto prop_msg_full;
|
|
if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP)
|
|
if (nla_put_u32(msg->skb, TIPC_NLA_PROP_MTU, bearer->mtu))
|
|
goto prop_msg_full;
|
|
|
|
nla_nest_end(msg->skb, prop);
|
|
|
|
#ifdef CONFIG_TIPC_MEDIA_UDP
|
|
if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP) {
|
|
if (tipc_udp_nl_add_bearer_data(msg, bearer))
|
|
goto attr_msg_full;
|
|
}
|
|
#endif
|
|
|
|
nla_nest_end(msg->skb, attrs);
|
|
genlmsg_end(msg->skb, hdr);
|
|
|
|
return 0;
|
|
|
|
prop_msg_full:
|
|
nla_nest_cancel(msg->skb, prop);
|
|
attr_msg_full:
|
|
nla_nest_cancel(msg->skb, attrs);
|
|
msg_full:
|
|
genlmsg_cancel(msg->skb, hdr);
|
|
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
int err;
|
|
int i = cb->args[0];
|
|
struct tipc_bearer *bearer;
|
|
struct tipc_nl_msg msg;
|
|
struct net *net = sock_net(skb->sk);
|
|
struct tipc_net *tn = net_generic(net, tipc_net_id);
|
|
|
|
if (i == MAX_BEARERS)
|
|
return 0;
|
|
|
|
msg.skb = skb;
|
|
msg.portid = NETLINK_CB(cb->skb).portid;
|
|
msg.seq = cb->nlh->nlmsg_seq;
|
|
|
|
rtnl_lock();
|
|
for (i = 0; i < MAX_BEARERS; i++) {
|
|
bearer = rtnl_dereference(tn->bearer_list[i]);
|
|
if (!bearer)
|
|
continue;
|
|
|
|
err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI);
|
|
if (err)
|
|
break;
|
|
}
|
|
rtnl_unlock();
|
|
|
|
cb->args[0] = i;
|
|
return skb->len;
|
|
}
|
|
|
|
int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
int err;
|
|
char *name;
|
|
struct sk_buff *rep;
|
|
struct tipc_bearer *bearer;
|
|
struct tipc_nl_msg msg;
|
|
struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
|
|
struct net *net = genl_info_net(info);
|
|
|
|
if (!info->attrs[TIPC_NLA_BEARER])
|
|
return -EINVAL;
|
|
|
|
err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX,
|
|
info->attrs[TIPC_NLA_BEARER],
|
|
tipc_nl_bearer_policy, info->extack);
|
|
if (err)
|
|
return err;
|
|
|
|
if (!attrs[TIPC_NLA_BEARER_NAME])
|
|
return -EINVAL;
|
|
name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
|
|
|
|
rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
|
|
if (!rep)
|
|
return -ENOMEM;
|
|
|
|
msg.skb = rep;
|
|
msg.portid = info->snd_portid;
|
|
msg.seq = info->snd_seq;
|
|
|
|
rtnl_lock();
|
|
bearer = tipc_bearer_find(net, name);
|
|
if (!bearer) {
|
|
err = -EINVAL;
|
|
goto err_out;
|
|
}
|
|
|
|
err = __tipc_nl_add_bearer(&msg, bearer, 0);
|
|
if (err)
|
|
goto err_out;
|
|
rtnl_unlock();
|
|
|
|
return genlmsg_reply(rep, info);
|
|
err_out:
|
|
rtnl_unlock();
|
|
nlmsg_free(rep);
|
|
|
|
return err;
|
|
}
|
|
|
|
int __tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
int err;
|
|
char *name;
|
|
struct tipc_bearer *bearer;
|
|
struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
|
|
struct net *net = sock_net(skb->sk);
|
|
|
|
if (!info->attrs[TIPC_NLA_BEARER])
|
|
return -EINVAL;
|
|
|
|
err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX,
|
|
info->attrs[TIPC_NLA_BEARER],
|
|
tipc_nl_bearer_policy, info->extack);
|
|
if (err)
|
|
return err;
|
|
|
|
if (!attrs[TIPC_NLA_BEARER_NAME])
|
|
return -EINVAL;
|
|
|
|
name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
|
|
|
|
bearer = tipc_bearer_find(net, name);
|
|
if (!bearer)
|
|
return -EINVAL;
|
|
|
|
bearer_disable(net, bearer);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
int err;
|
|
|
|
rtnl_lock();
|
|
err = __tipc_nl_bearer_disable(skb, info);
|
|
rtnl_unlock();
|
|
|
|
return err;
|
|
}
|
|
|
|
int __tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
int err;
|
|
char *bearer;
|
|
struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
|
|
struct net *net = sock_net(skb->sk);
|
|
u32 domain = 0;
|
|
u32 prio;
|
|
|
|
prio = TIPC_MEDIA_LINK_PRI;
|
|
|
|
if (!info->attrs[TIPC_NLA_BEARER])
|
|
return -EINVAL;
|
|
|
|
err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX,
|
|
info->attrs[TIPC_NLA_BEARER],
|
|
tipc_nl_bearer_policy, info->extack);
|
|
if (err)
|
|
return err;
|
|
|
|
if (!attrs[TIPC_NLA_BEARER_NAME])
|
|
return -EINVAL;
|
|
|
|
bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
|
|
|
|
if (attrs[TIPC_NLA_BEARER_DOMAIN])
|
|
domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]);
|
|
|
|
if (attrs[TIPC_NLA_BEARER_PROP]) {
|
|
struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
|
|
|
|
err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
|
|
props);
|
|
if (err)
|
|
return err;
|
|
|
|
if (props[TIPC_NLA_PROP_PRIO])
|
|
prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
|
|
}
|
|
|
|
return tipc_enable_bearer(net, bearer, domain, prio, attrs);
|
|
}
|
|
|
|
int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
int err;
|
|
|
|
rtnl_lock();
|
|
err = __tipc_nl_bearer_enable(skb, info);
|
|
rtnl_unlock();
|
|
|
|
return err;
|
|
}
|
|
|
|
int tipc_nl_bearer_add(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
int err;
|
|
char *name;
|
|
struct tipc_bearer *b;
|
|
struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
|
|
struct net *net = sock_net(skb->sk);
|
|
|
|
if (!info->attrs[TIPC_NLA_BEARER])
|
|
return -EINVAL;
|
|
|
|
err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX,
|
|
info->attrs[TIPC_NLA_BEARER],
|
|
tipc_nl_bearer_policy, info->extack);
|
|
if (err)
|
|
return err;
|
|
|
|
if (!attrs[TIPC_NLA_BEARER_NAME])
|
|
return -EINVAL;
|
|
name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
|
|
|
|
rtnl_lock();
|
|
b = tipc_bearer_find(net, name);
|
|
if (!b) {
|
|
rtnl_unlock();
|
|
return -EINVAL;
|
|
}
|
|
|
|
#ifdef CONFIG_TIPC_MEDIA_UDP
|
|
if (attrs[TIPC_NLA_BEARER_UDP_OPTS]) {
|
|
err = tipc_udp_nl_bearer_add(b,
|
|
attrs[TIPC_NLA_BEARER_UDP_OPTS]);
|
|
if (err) {
|
|
rtnl_unlock();
|
|
return err;
|
|
}
|
|
}
|
|
#endif
|
|
rtnl_unlock();
|
|
|
|
return 0;
|
|
}
|
|
|
|
int __tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct tipc_bearer *b;
|
|
struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
|
|
struct net *net = sock_net(skb->sk);
|
|
char *name;
|
|
int err;
|
|
|
|
if (!info->attrs[TIPC_NLA_BEARER])
|
|
return -EINVAL;
|
|
|
|
err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX,
|
|
info->attrs[TIPC_NLA_BEARER],
|
|
tipc_nl_bearer_policy, info->extack);
|
|
if (err)
|
|
return err;
|
|
|
|
if (!attrs[TIPC_NLA_BEARER_NAME])
|
|
return -EINVAL;
|
|
name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
|
|
|
|
b = tipc_bearer_find(net, name);
|
|
if (!b)
|
|
return -EINVAL;
|
|
|
|
if (attrs[TIPC_NLA_BEARER_PROP]) {
|
|
struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
|
|
|
|
err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
|
|
props);
|
|
if (err)
|
|
return err;
|
|
|
|
if (props[TIPC_NLA_PROP_TOL]) {
|
|
b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
|
|
tipc_node_apply_property(net, b, TIPC_NLA_PROP_TOL);
|
|
}
|
|
if (props[TIPC_NLA_PROP_PRIO])
|
|
b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
|
|
if (props[TIPC_NLA_PROP_WIN])
|
|
b->max_win = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
|
|
if (props[TIPC_NLA_PROP_MTU]) {
|
|
if (b->media->type_id != TIPC_MEDIA_TYPE_UDP)
|
|
return -EINVAL;
|
|
#ifdef CONFIG_TIPC_MEDIA_UDP
|
|
if (tipc_udp_mtu_bad(nla_get_u32
|
|
(props[TIPC_NLA_PROP_MTU])))
|
|
return -EINVAL;
|
|
b->mtu = nla_get_u32(props[TIPC_NLA_PROP_MTU]);
|
|
tipc_node_apply_property(net, b, TIPC_NLA_PROP_MTU);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
int err;
|
|
|
|
rtnl_lock();
|
|
err = __tipc_nl_bearer_set(skb, info);
|
|
rtnl_unlock();
|
|
|
|
return err;
|
|
}
|
|
|
|
static int __tipc_nl_add_media(struct tipc_nl_msg *msg,
|
|
struct tipc_media *media, int nlflags)
|
|
{
|
|
void *hdr;
|
|
struct nlattr *attrs;
|
|
struct nlattr *prop;
|
|
|
|
hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
|
|
nlflags, TIPC_NL_MEDIA_GET);
|
|
if (!hdr)
|
|
return -EMSGSIZE;
|
|
|
|
attrs = nla_nest_start_noflag(msg->skb, TIPC_NLA_MEDIA);
|
|
if (!attrs)
|
|
goto msg_full;
|
|
|
|
if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name))
|
|
goto attr_msg_full;
|
|
|
|
prop = nla_nest_start_noflag(msg->skb, TIPC_NLA_MEDIA_PROP);
|
|
if (!prop)
|
|
goto prop_msg_full;
|
|
if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority))
|
|
goto prop_msg_full;
|
|
if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance))
|
|
goto prop_msg_full;
|
|
if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->max_win))
|
|
goto prop_msg_full;
|
|
if (media->type_id == TIPC_MEDIA_TYPE_UDP)
|
|
if (nla_put_u32(msg->skb, TIPC_NLA_PROP_MTU, media->mtu))
|
|
goto prop_msg_full;
|
|
|
|
nla_nest_end(msg->skb, prop);
|
|
nla_nest_end(msg->skb, attrs);
|
|
genlmsg_end(msg->skb, hdr);
|
|
|
|
return 0;
|
|
|
|
prop_msg_full:
|
|
nla_nest_cancel(msg->skb, prop);
|
|
attr_msg_full:
|
|
nla_nest_cancel(msg->skb, attrs);
|
|
msg_full:
|
|
genlmsg_cancel(msg->skb, hdr);
|
|
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
int err;
|
|
int i = cb->args[0];
|
|
struct tipc_nl_msg msg;
|
|
|
|
if (i == MAX_MEDIA)
|
|
return 0;
|
|
|
|
msg.skb = skb;
|
|
msg.portid = NETLINK_CB(cb->skb).portid;
|
|
msg.seq = cb->nlh->nlmsg_seq;
|
|
|
|
rtnl_lock();
|
|
for (; media_info_array[i] != NULL; i++) {
|
|
err = __tipc_nl_add_media(&msg, media_info_array[i],
|
|
NLM_F_MULTI);
|
|
if (err)
|
|
break;
|
|
}
|
|
rtnl_unlock();
|
|
|
|
cb->args[0] = i;
|
|
return skb->len;
|
|
}
|
|
|
|
int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
int err;
|
|
char *name;
|
|
struct tipc_nl_msg msg;
|
|
struct tipc_media *media;
|
|
struct sk_buff *rep;
|
|
struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
|
|
|
|
if (!info->attrs[TIPC_NLA_MEDIA])
|
|
return -EINVAL;
|
|
|
|
err = nla_parse_nested_deprecated(attrs, TIPC_NLA_MEDIA_MAX,
|
|
info->attrs[TIPC_NLA_MEDIA],
|
|
tipc_nl_media_policy, info->extack);
|
|
if (err)
|
|
return err;
|
|
|
|
if (!attrs[TIPC_NLA_MEDIA_NAME])
|
|
return -EINVAL;
|
|
name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
|
|
|
|
rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
|
|
if (!rep)
|
|
return -ENOMEM;
|
|
|
|
msg.skb = rep;
|
|
msg.portid = info->snd_portid;
|
|
msg.seq = info->snd_seq;
|
|
|
|
rtnl_lock();
|
|
media = tipc_media_find(name);
|
|
if (!media) {
|
|
err = -EINVAL;
|
|
goto err_out;
|
|
}
|
|
|
|
err = __tipc_nl_add_media(&msg, media, 0);
|
|
if (err)
|
|
goto err_out;
|
|
rtnl_unlock();
|
|
|
|
return genlmsg_reply(rep, info);
|
|
err_out:
|
|
rtnl_unlock();
|
|
nlmsg_free(rep);
|
|
|
|
return err;
|
|
}
|
|
|
|
int __tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
int err;
|
|
char *name;
|
|
struct tipc_media *m;
|
|
struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
|
|
|
|
if (!info->attrs[TIPC_NLA_MEDIA])
|
|
return -EINVAL;
|
|
|
|
err = nla_parse_nested_deprecated(attrs, TIPC_NLA_MEDIA_MAX,
|
|
info->attrs[TIPC_NLA_MEDIA],
|
|
tipc_nl_media_policy, info->extack);
|
|
|
|
if (!attrs[TIPC_NLA_MEDIA_NAME])
|
|
return -EINVAL;
|
|
name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
|
|
|
|
m = tipc_media_find(name);
|
|
if (!m)
|
|
return -EINVAL;
|
|
|
|
if (attrs[TIPC_NLA_MEDIA_PROP]) {
|
|
struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
|
|
|
|
err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP],
|
|
props);
|
|
if (err)
|
|
return err;
|
|
|
|
if (props[TIPC_NLA_PROP_TOL])
|
|
m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
|
|
if (props[TIPC_NLA_PROP_PRIO])
|
|
m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
|
|
if (props[TIPC_NLA_PROP_WIN])
|
|
m->max_win = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
|
|
if (props[TIPC_NLA_PROP_MTU]) {
|
|
if (m->type_id != TIPC_MEDIA_TYPE_UDP)
|
|
return -EINVAL;
|
|
#ifdef CONFIG_TIPC_MEDIA_UDP
|
|
if (tipc_udp_mtu_bad(nla_get_u32
|
|
(props[TIPC_NLA_PROP_MTU])))
|
|
return -EINVAL;
|
|
m->mtu = nla_get_u32(props[TIPC_NLA_PROP_MTU]);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
int err;
|
|
|
|
rtnl_lock();
|
|
err = __tipc_nl_media_set(skb, info);
|
|
rtnl_unlock();
|
|
|
|
return err;
|
|
}
|