| 1 |
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| 2 | #ifndef __NET_RTNETLINK_H
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| 3 | #define __NET_RTNETLINK_H
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| 4 |
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| 5 | #include <linux/rtnetlink.h>
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| 6 | #include <net/netlink.h>
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| 7 |
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| 8 | typedef int (*rtnl_doit_func)(struct sk_buff *, struct nlmsghdr *,
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| 9 | struct netlink_ext_ack *);
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| 10 | typedef int (*rtnl_dumpit_func)(struct sk_buff *, struct netlink_callback *);
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| 11 |
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| 12 | enum rtnl_link_flags {
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| 13 | RTNL_FLAG_DOIT_UNLOCKED = 1,
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| 14 | };
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| 15 |
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| 16 | void rtnl_register(int protocol, int msgtype,
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| 17 | rtnl_doit_func, rtnl_dumpit_func, unsigned int flags);
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| 18 | int rtnl_register_module(struct module *owner, int protocol, int msgtype,
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| 19 | rtnl_doit_func, rtnl_dumpit_func, unsigned int flags);
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| 20 | int rtnl_unregister(int protocol, int msgtype);
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| 21 | void rtnl_unregister_all(int protocol);
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| 22 |
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| 23 | static inline int rtnl_msg_family(const struct nlmsghdr *nlh)
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| 24 | {
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| 25 | if (nlmsg_len(nlh) >= sizeof(struct rtgenmsg))
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| 26 | return ((struct rtgenmsg *) nlmsg_data(nlh))->rtgen_family;
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| 27 | else
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| 28 | return AF_UNSPEC;
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| 29 | }
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| 30 |
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| 31 | |
| 32 | * struct rtnl_link_ops - rtnetlink link operations
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| 33 | *
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| 34 | * @list: Used internally
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| 35 | * @kind: Identifier
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| 36 | * @maxtype: Highest device specific netlink attribute number
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| 37 | * @policy: Netlink policy for device specific attribute validation
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| 38 | * @validate: Optional validation function for netlink/changelink parameters
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| 39 | * @priv_size: sizeof net_device private space
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| 40 | * @setup: net_device setup function
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| 41 | * @newlink: Function for configuring and registering a new device
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| 42 | * @changelink: Function for changing parameters of an existing device
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| 43 | * @dellink: Function to remove a device
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| 44 | * @get_size: Function to calculate required room for dumping device
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| 45 | * specific netlink attributes
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| 46 | * @fill_info: Function to dump device specific netlink attributes
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| 47 | * @get_xstats_size: Function to calculate required room for dumping device
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| 48 | * specific statistics
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| 49 | * @fill_xstats: Function to dump device specific statistics
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| 50 | * @get_num_tx_queues: Function to determine number of transmit queues
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| 51 | * to create when creating a new device.
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| 52 | * @get_num_rx_queues: Function to determine number of receive queues
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| 53 | * to create when creating a new device.
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| 54 | * @get_link_net: Function to get the i/o netns of the device
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| 55 | * @get_linkxstats_size: Function to calculate the required room for
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| 56 | * dumping device-specific extended link stats
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| 57 | * @fill_linkxstats: Function to dump device-specific extended link stats
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| 58 |
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| 59 | struct rtnl_link_ops {
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| 60 | struct list_head list;
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| 61 |
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| 62 | const char *kind;
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| 63 |
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| 64 | size_t priv_size;
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| 65 | void (*setup)(struct net_device *dev);
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| 66 |
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| 67 | unsigned int maxtype;
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| 68 | const struct nla_policy *policy;
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| 69 | int (*validate)(struct nlattr *tb[],
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| 70 | struct nlattr *data[],
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| 71 | struct netlink_ext_ack *extack);
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| 72 |
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| 73 | int (*newlink)(struct net *src_net,
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| 74 | struct net_device *dev,
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| 75 | struct nlattr *tb[],
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| 76 | struct nlattr *data[],
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| 77 | struct netlink_ext_ack *extack);
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| 78 | int (*changelink)(struct net_device *dev,
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| 79 | struct nlattr *tb[],
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| 80 | struct nlattr *data[],
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| 81 | struct netlink_ext_ack *extack);
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| 82 | void (*dellink)(struct net_device *dev,
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| 83 | struct list_head *head);
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| 84 |
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| 85 | size_t (*get_size)(const struct net_device *dev);
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| 86 | int (*fill_info)(struct sk_buff *skb,
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| 87 | const struct net_device *dev);
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| 88 |
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| 89 | size_t (*get_xstats_size)(const struct net_device *dev);
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| 90 | int (*fill_xstats)(struct sk_buff *skb,
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| 91 | const struct net_device *dev);
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| 92 | unsigned int (*get_num_tx_queues)(void);
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| 93 | unsigned int (*get_num_rx_queues)(void);
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| 94 |
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| 95 | unsigned int slave_maxtype;
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| 96 | const struct nla_policy *slave_policy;
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| 97 | int (*slave_changelink)(struct net_device *dev,
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| 98 | struct net_device *slave_dev,
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| 99 | struct nlattr *tb[],
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| 100 | struct nlattr *data[],
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| 101 | struct netlink_ext_ack *extack);
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| 102 | size_t (*get_slave_size)(const struct net_device *dev,
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| 103 | const struct net_device *slave_dev);
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| 104 | int (*fill_slave_info)(struct sk_buff *skb,
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| 105 | const struct net_device *dev,
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| 106 | const struct net_device *slave_dev);
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| 107 | struct net *(*get_link_net)(const struct net_device *dev);
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| 108 | size_t (*get_linkxstats_size)(const struct net_device *dev,
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| 109 | int attr);
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| 110 | int (*fill_linkxstats)(struct sk_buff *skb,
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| 111 | const struct net_device *dev,
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| 112 | int *prividx, int attr);
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| 113 | };
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| 114 |
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| 115 | int __rtnl_link_register(struct rtnl_link_ops *ops);
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| 116 | void __rtnl_link_unregister(struct rtnl_link_ops *ops);
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| 117 |
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| 118 | int rtnl_link_register(struct rtnl_link_ops *ops);
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| 119 | void rtnl_link_unregister(struct rtnl_link_ops *ops);
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| 120 |
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| 121 | |
| 122 | * struct rtnl_af_ops - rtnetlink address family operations
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| 123 | *
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| 124 | * @list: Used internally
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| 125 | * @family: Address family
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| 126 | * @fill_link_af: Function to fill IFLA_AF_SPEC with address family
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| 127 | * specific netlink attributes.
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| 128 | * @get_link_af_size: Function to calculate size of address family specific
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| 129 | * netlink attributes.
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| 130 | * @validate_link_af: Validate a IFLA_AF_SPEC attribute, must check attr
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| 131 | * for invalid configuration settings.
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| 132 | * @set_link_af: Function to parse a IFLA_AF_SPEC attribute and modify
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| 133 | * net_device accordingly.
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| 134 |
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| 135 | struct rtnl_af_ops {
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| 136 | struct list_head list;
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| 137 | int family;
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| 138 |
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| 139 | int (*fill_link_af)(struct sk_buff *skb,
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| 140 | const struct net_device *dev,
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| 141 | u32 ext_filter_mask);
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| 142 | size_t (*get_link_af_size)(const struct net_device *dev,
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| 143 | u32 ext_filter_mask);
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| 144 |
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| 145 | int (*validate_link_af)(const struct net_device *dev,
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| 146 | const struct nlattr *attr);
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| 147 | int (*set_link_af)(struct net_device *dev,
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| 148 | const struct nlattr *attr);
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| 149 |
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| 150 | int (*fill_stats_af)(struct sk_buff *skb,
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| 151 | const struct net_device *dev);
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| 152 | size_t (*get_stats_af_size)(const struct net_device *dev);
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| 153 | };
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| 154 |
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| 155 | void rtnl_af_register(struct rtnl_af_ops *ops);
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| 156 | void rtnl_af_unregister(struct rtnl_af_ops *ops);
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| 157 |
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| 158 | struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]);
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| 159 | struct net_device *rtnl_create_link(struct net *net, const char *ifname,
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| 160 | unsigned char name_assign_type,
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| 161 | const struct rtnl_link_ops *ops,
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| 162 | struct nlattr *tb[],
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| 163 | struct netlink_ext_ack *extack);
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| 164 | int rtnl_delete_link(struct net_device *dev);
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| 165 | int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm);
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| 166 |
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| 167 | int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len,
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| 168 | struct netlink_ext_ack *exterr);
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| 169 | struct net *rtnl_get_net_ns_capable(struct sock *sk, int netnsid);
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| 170 |
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| 171 | #define MODULE_ALIAS_RTNL_LINK(kind) MODULE_ALIAS("rtnl-link-" kind)
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| 172 |
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| 173 | #endif
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