| 1 | |
| 2 | * net/tipc/netlink.c: TIPC configuration handling
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| 3 | *
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| 4 | * Copyright (c) 2005-2006, 2014, Ericsson AB
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| 5 | * Copyright (c) 2005-2007, Wind River Systems
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| 6 | * All rights reserved.
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| 7 | *
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| 8 | * Redistribution and use in source and binary forms, with or without
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| 9 | * modification, are permitted provided that the following conditions are met:
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| 10 | *
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| 11 | * 1. Redistributions of source code must retain the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer.
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| 13 | * 2. Redistributions in binary form must reproduce the above copyright
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| 14 | * notice, this list of conditions and the following disclaimer in the
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| 15 | * documentation and/or other materials provided with the distribution.
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| 16 | * 3. Neither the names of the copyright holders nor the names of its
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| 17 | * contributors may be used to endorse or promote products derived from
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| 18 | * this software without specific prior written permission.
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| 19 | *
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| 20 | * Alternatively, this software may be distributed under the terms of the
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| 21 | * GNU General Public License ("GPL") version 2 as published by the Free
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| 22 | * Software Foundation.
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| 23 | *
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| 24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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| 25 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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| 28 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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| 29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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| 30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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| 31 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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| 32 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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| 33 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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| 34 | * POSSIBILITY OF SUCH DAMAGE.
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| 35 |
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| 36 |
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| 37 | #include "core.h"
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| 38 | #include "socket.h"
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| 39 | #include "name_table.h"
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| 40 | #include "bearer.h"
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| 41 | #include "link.h"
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| 42 | #include "node.h"
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| 43 | #include "net.h"
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| 44 | #include "udp_media.h"
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| 45 | #include <net/genetlink.h>
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| 46 |
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| 47 | static const struct nla_policy tipc_nl_policy[TIPC_NLA_MAX + 1] = {
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| 48 | [TIPC_NLA_UNSPEC] = { .type = NLA_UNSPEC, },
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| 49 | [TIPC_NLA_BEARER] = { .type = NLA_NESTED, },
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| 50 | [TIPC_NLA_SOCK] = { .type = NLA_NESTED, },
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| 51 | [TIPC_NLA_PUBL] = { .type = NLA_NESTED, },
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| 52 | [TIPC_NLA_LINK] = { .type = NLA_NESTED, },
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| 53 | [TIPC_NLA_MEDIA] = { .type = NLA_NESTED, },
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| 54 | [TIPC_NLA_NODE] = { .type = NLA_NESTED, },
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| 55 | [TIPC_NLA_NET] = { .type = NLA_NESTED, },
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| 56 | [TIPC_NLA_NAME_TABLE] = { .type = NLA_NESTED, },
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| 57 | [TIPC_NLA_MON] = { .type = NLA_NESTED, },
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| 58 | };
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| 59 |
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| 60 | const struct nla_policy
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| 61 | tipc_nl_name_table_policy[TIPC_NLA_NAME_TABLE_MAX + 1] = {
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| 62 | [TIPC_NLA_NAME_TABLE_UNSPEC] = { .type = NLA_UNSPEC },
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| 63 | [TIPC_NLA_NAME_TABLE_PUBL] = { .type = NLA_NESTED }
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| 64 | };
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| 65 |
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| 66 | const struct nla_policy tipc_nl_monitor_policy[TIPC_NLA_MON_MAX + 1] = {
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| 67 | [TIPC_NLA_MON_UNSPEC] = { .type = NLA_UNSPEC },
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| 68 | [TIPC_NLA_MON_REF] = { .type = NLA_U32 },
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| 69 | [TIPC_NLA_MON_ACTIVATION_THRESHOLD] = { .type = NLA_U32 },
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| 70 | };
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| 71 |
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| 72 | const struct nla_policy tipc_nl_sock_policy[TIPC_NLA_SOCK_MAX + 1] = {
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| 73 | [TIPC_NLA_SOCK_UNSPEC] = { .type = NLA_UNSPEC },
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| 74 | [TIPC_NLA_SOCK_ADDR] = { .type = NLA_U32 },
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| 75 | [TIPC_NLA_SOCK_REF] = { .type = NLA_U32 },
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| 76 | [TIPC_NLA_SOCK_CON] = { .type = NLA_NESTED },
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| 77 | [TIPC_NLA_SOCK_HAS_PUBL] = { .type = NLA_FLAG }
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| 78 | };
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| 79 |
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| 80 | const struct nla_policy tipc_nl_net_policy[TIPC_NLA_NET_MAX + 1] = {
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| 81 | [TIPC_NLA_NET_UNSPEC] = { .type = NLA_UNSPEC },
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| 82 | [TIPC_NLA_NET_ID] = { .type = NLA_U32 },
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| 83 | [TIPC_NLA_NET_ADDR] = { .type = NLA_U32 },
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| 84 | [TIPC_NLA_NET_NODEID] = { .type = NLA_U64 },
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| 85 | [TIPC_NLA_NET_NODEID_W1] = { .type = NLA_U64 },
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| 86 | [TIPC_NLA_NET_ADDR_LEGACY] = { .type = NLA_FLAG }
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| 87 | };
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| 88 |
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| 89 | const struct nla_policy tipc_nl_link_policy[TIPC_NLA_LINK_MAX + 1] = {
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| 90 | [TIPC_NLA_LINK_UNSPEC] = { .type = NLA_UNSPEC },
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| 91 | [TIPC_NLA_LINK_NAME] = { .type = NLA_NUL_STRING,
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| 92 | .len = TIPC_MAX_LINK_NAME },
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| 93 | [TIPC_NLA_LINK_MTU] = { .type = NLA_U32 },
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| 94 | [TIPC_NLA_LINK_BROADCAST] = { .type = NLA_FLAG },
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| 95 | [TIPC_NLA_LINK_UP] = { .type = NLA_FLAG },
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| 96 | [TIPC_NLA_LINK_ACTIVE] = { .type = NLA_FLAG },
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| 97 | [TIPC_NLA_LINK_PROP] = { .type = NLA_NESTED },
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| 98 | [TIPC_NLA_LINK_STATS] = { .type = NLA_NESTED },
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| 99 | [TIPC_NLA_LINK_RX] = { .type = NLA_U32 },
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| 100 | [TIPC_NLA_LINK_TX] = { .type = NLA_U32 }
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| 101 | };
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| 102 |
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| 103 | const struct nla_policy tipc_nl_node_policy[TIPC_NLA_NODE_MAX + 1] = {
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| 104 | [TIPC_NLA_NODE_UNSPEC] = { .type = NLA_UNSPEC },
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| 105 | [TIPC_NLA_NODE_ADDR] = { .type = NLA_U32 },
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| 106 | [TIPC_NLA_NODE_UP] = { .type = NLA_FLAG },
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| 107 | [TIPC_NLA_NODE_ID] = { .type = NLA_BINARY,
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| 108 | .len = TIPC_NODEID_LEN},
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| 109 | [TIPC_NLA_NODE_KEY] = { .type = NLA_BINARY,
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| 110 | .len = TIPC_AEAD_KEY_SIZE_MAX},
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| 111 | [TIPC_NLA_NODE_KEY_MASTER] = { .type = NLA_FLAG },
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| 112 | [TIPC_NLA_NODE_REKEYING] = { .type = NLA_U32 },
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| 113 | };
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| 114 |
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| 115 |
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| 116 | static const struct netlink_range_validation tipc_nl_mtu_range = {
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| 117 | .max = U16_MAX,
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| 118 | };
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| 119 |
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| 120 | const struct nla_policy tipc_nl_prop_policy[TIPC_NLA_PROP_MAX + 1] = {
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| 121 | [TIPC_NLA_PROP_UNSPEC] = { .type = NLA_UNSPEC },
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| 122 | [TIPC_NLA_PROP_PRIO] = { .type = NLA_U32 },
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| 123 | [TIPC_NLA_PROP_TOL] = { .type = NLA_U32 },
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| 124 | [TIPC_NLA_PROP_WIN] = { .type = NLA_U32 },
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| 125 | [TIPC_NLA_PROP_MTU] = NLA_POLICY_FULL_RANGE(NLA_U32, &tipc_nl_mtu_range),
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| 126 | [TIPC_NLA_PROP_BROADCAST] = { .type = NLA_U32 },
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| 127 | [TIPC_NLA_PROP_BROADCAST_RATIO] = { .type = NLA_U32 }
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| 128 | };
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| 129 |
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| 130 | const struct nla_policy tipc_nl_bearer_policy[TIPC_NLA_BEARER_MAX + 1] = {
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| 131 | [TIPC_NLA_BEARER_UNSPEC] = { .type = NLA_UNSPEC },
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| 132 | [TIPC_NLA_BEARER_NAME] = { .type = NLA_NUL_STRING,
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| 133 | .len = TIPC_MAX_BEARER_NAME },
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| 134 | [TIPC_NLA_BEARER_PROP] = { .type = NLA_NESTED },
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| 135 | [TIPC_NLA_BEARER_DOMAIN] = { .type = NLA_U32 }
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| 136 | };
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| 137 |
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| 138 | const struct nla_policy tipc_nl_media_policy[TIPC_NLA_MEDIA_MAX + 1] = {
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| 139 | [TIPC_NLA_MEDIA_UNSPEC] = { .type = NLA_UNSPEC },
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| 140 | [TIPC_NLA_MEDIA_NAME] = { .type = NLA_STRING },
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| 141 | [TIPC_NLA_MEDIA_PROP] = { .type = NLA_NESTED }
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| 142 | };
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| 143 |
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| 144 | const struct nla_policy tipc_nl_udp_policy[TIPC_NLA_UDP_MAX + 1] = {
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| 145 | [TIPC_NLA_UDP_UNSPEC] = {.type = NLA_UNSPEC},
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| 146 | [TIPC_NLA_UDP_LOCAL] = {.type = NLA_BINARY,
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| 147 | .len = sizeof(struct sockaddr_storage)},
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| 148 | [TIPC_NLA_UDP_REMOTE] = {.type = NLA_BINARY,
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| 149 | .len = sizeof(struct sockaddr_storage)},
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| 150 | };
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| 151 |
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| 152 | |
| 153 | * so we have a separate genl handling for the new API.
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| 154 |
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| 155 | static const struct genl_ops tipc_genl_v2_ops[] = {
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| 156 | {
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| 157 | .cmd = TIPC_NL_BEARER_DISABLE,
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| 158 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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| 159 | .flags = GENL_UNS_ADMIN_PERM,
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| 160 | .doit = tipc_nl_bearer_disable,
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| 161 | },
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| 162 | {
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| 163 | .cmd = TIPC_NL_BEARER_ENABLE,
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| 164 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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| 165 | .flags = GENL_UNS_ADMIN_PERM,
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| 166 | .doit = tipc_nl_bearer_enable,
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| 167 | },
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| 168 | {
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| 169 | .cmd = TIPC_NL_BEARER_GET,
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| 170 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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| 171 | .doit = tipc_nl_bearer_get,
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| 172 | .dumpit = tipc_nl_bearer_dump,
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| 173 | },
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| 174 | {
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| 175 | .cmd = TIPC_NL_BEARER_ADD,
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| 176 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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| 177 | .flags = GENL_UNS_ADMIN_PERM,
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| 178 | .doit = tipc_nl_bearer_add,
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| 179 | },
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| 180 | {
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| 181 | .cmd = TIPC_NL_BEARER_SET,
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| 182 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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| 183 | .flags = GENL_UNS_ADMIN_PERM,
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| 184 | .doit = tipc_nl_bearer_set,
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| 185 | },
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| 186 | {
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| 187 | .cmd = TIPC_NL_SOCK_GET,
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| 188 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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| 189 | .start = tipc_dump_start,
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| 190 | .dumpit = tipc_nl_sk_dump,
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| 191 | .done = tipc_dump_done,
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| 192 | },
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| 193 | {
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| 194 | .cmd = TIPC_NL_PUBL_GET,
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| 195 | .validate = GENL_DONT_VALIDATE_STRICT |
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| 196 | GENL_DONT_VALIDATE_DUMP_STRICT,
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| 197 | .dumpit = tipc_nl_publ_dump,
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| 198 | },
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| 199 | {
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| 200 | .cmd = TIPC_NL_LINK_GET,
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| 201 | .validate = GENL_DONT_VALIDATE_STRICT,
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| 202 | .doit = tipc_nl_node_get_link,
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| 203 | .dumpit = tipc_nl_node_dump_link,
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| 204 | },
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| 205 | {
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| 206 | .cmd = TIPC_NL_LINK_SET,
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| 207 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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| 208 | .flags = GENL_UNS_ADMIN_PERM,
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| 209 | .doit = tipc_nl_node_set_link,
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| 210 | },
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| 211 | {
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| 212 | .cmd = TIPC_NL_LINK_RESET_STATS,
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| 213 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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| 214 | .flags = GENL_UNS_ADMIN_PERM,
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| 215 | .doit = tipc_nl_node_reset_link_stats,
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| 216 | },
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| 217 | {
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| 218 | .cmd = TIPC_NL_MEDIA_GET,
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| 219 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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| 220 | .doit = tipc_nl_media_get,
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| 221 | .dumpit = tipc_nl_media_dump,
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| 222 | },
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| 223 | {
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| 224 | .cmd = TIPC_NL_MEDIA_SET,
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| 225 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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| 226 | .flags = GENL_UNS_ADMIN_PERM,
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| 227 | .doit = tipc_nl_media_set,
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| 228 | },
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| 229 | {
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| 230 | .cmd = TIPC_NL_NODE_GET,
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| 231 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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| 232 | .dumpit = tipc_nl_node_dump,
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| 233 | },
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| 234 | {
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| 235 | .cmd = TIPC_NL_NET_GET,
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| 236 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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| 237 | .dumpit = tipc_nl_net_dump,
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| 238 | },
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| 239 | {
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| 240 | .cmd = TIPC_NL_NET_SET,
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| 241 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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| 242 | .flags = GENL_UNS_ADMIN_PERM,
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| 243 | .doit = tipc_nl_net_set,
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| 244 | },
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| 245 | {
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| 246 | .cmd = TIPC_NL_NAME_TABLE_GET,
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| 247 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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| 248 | .dumpit = tipc_nl_name_table_dump,
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| 249 | },
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| 250 | {
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| 251 | .cmd = TIPC_NL_MON_SET,
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| 252 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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| 253 | .flags = GENL_UNS_ADMIN_PERM,
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| 254 | .doit = tipc_nl_node_set_monitor,
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| 255 | },
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| 256 | {
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| 257 | .cmd = TIPC_NL_MON_GET,
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| 258 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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| 259 | .doit = tipc_nl_node_get_monitor,
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| 260 | .dumpit = tipc_nl_node_dump_monitor,
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| 261 | },
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| 262 | {
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| 263 | .cmd = TIPC_NL_MON_PEER_GET,
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| 264 | .validate = GENL_DONT_VALIDATE_STRICT |
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| 265 | GENL_DONT_VALIDATE_DUMP_STRICT,
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| 266 | .dumpit = tipc_nl_node_dump_monitor_peer,
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| 267 | },
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| 268 | {
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| 269 | .cmd = TIPC_NL_PEER_REMOVE,
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| 270 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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| 271 | .flags = GENL_UNS_ADMIN_PERM,
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| 272 | .doit = tipc_nl_peer_rm,
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| 273 | },
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| 274 | #ifdef CONFIG_TIPC_MEDIA_UDP
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| 275 | {
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| 276 | .cmd = TIPC_NL_UDP_GET_REMOTEIP,
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| 277 | .validate = GENL_DONT_VALIDATE_STRICT |
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| 278 | GENL_DONT_VALIDATE_DUMP_STRICT,
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| 279 | .dumpit = tipc_udp_nl_dump_remoteip,
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| 280 | },
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| 281 | #endif
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| 282 | #ifdef CONFIG_TIPC_CRYPTO
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| 283 | {
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| 284 | .cmd = TIPC_NL_KEY_SET,
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| 285 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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| 286 | .flags = GENL_UNS_ADMIN_PERM,
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| 287 | .doit = tipc_nl_node_set_key,
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| 288 | },
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| 289 | {
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| 290 | .cmd = TIPC_NL_KEY_FLUSH,
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| 291 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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| 292 | .flags = GENL_UNS_ADMIN_PERM,
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| 293 | .doit = tipc_nl_node_flush_key,
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| 294 | },
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| 295 | #endif
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| 296 | {
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| 297 | .cmd = TIPC_NL_ADDR_LEGACY_GET,
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| 298 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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| 299 | .doit = tipc_nl_net_addr_legacy_get,
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| 300 | },
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| 301 | };
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| 302 |
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| 303 | struct genl_family tipc_genl_family __ro_after_init = {
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| 304 | .name = TIPC_GENL_V2_NAME,
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| 305 | .version = TIPC_GENL_V2_VERSION,
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| 306 | .hdrsize = 0,
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| 307 | .maxattr = TIPC_NLA_MAX,
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| 308 | .policy = tipc_nl_policy,
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| 309 | .netnsok = true,
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| 310 | .module = THIS_MODULE,
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| 311 | .ops = tipc_genl_v2_ops,
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| 312 | .n_ops = ARRAY_SIZE(tipc_genl_v2_ops),
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| 313 | .resv_start_op = TIPC_NL_ADDR_LEGACY_GET + 1,
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| 314 | };
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| 315 |
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| 316 | int __init tipc_netlink_start(void)
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| 317 | {
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| 318 | int res;
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| 319 |
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| 320 | res = genl_register_family(&tipc_genl_family);
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| 321 | if (res) {
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| 322 | pr_err("Failed to register netlink interface\n");
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| 323 | return res;
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| 324 | }
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| 325 | return 0;
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| 326 | }
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| 327 |
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| 328 | void tipc_netlink_stop(void)
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| 329 | {
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| 330 | genl_unregister_family(&tipc_genl_family);
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| 331 | }
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