mirror of
https://github.com/AetherDroid/android_kernel_samsung_on5xelte.git
synced 2025-09-08 17:18:05 -04:00
Fixed MTP to work with TWRP
This commit is contained in:
awab228
commit
f6dfaef42e
50820 changed files with 20846062 additions and 0 deletions
235
net/openvswitch/vport-geneve.c
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235
net/openvswitch/vport-geneve.c
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/*
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* Copyright (c) 2014 Nicira, Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/version.h>
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#include <linux/in.h>
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#include <linux/ip.h>
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#include <linux/net.h>
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#include <linux/rculist.h>
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#include <linux/udp.h>
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#include <linux/if_vlan.h>
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#include <net/geneve.h>
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#include <net/icmp.h>
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#include <net/ip.h>
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#include <net/route.h>
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#include <net/udp.h>
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#include <net/xfrm.h>
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#include "datapath.h"
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#include "vport.h"
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/**
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* struct geneve_port - Keeps track of open UDP ports
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* @gs: The socket created for this port number.
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* @name: vport name.
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*/
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struct geneve_port {
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struct geneve_sock *gs;
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char name[IFNAMSIZ];
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};
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static LIST_HEAD(geneve_ports);
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static inline struct geneve_port *geneve_vport(const struct vport *vport)
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{
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return vport_priv(vport);
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}
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static inline struct genevehdr *geneve_hdr(const struct sk_buff *skb)
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{
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return (struct genevehdr *)(udp_hdr(skb) + 1);
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}
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/* Convert 64 bit tunnel ID to 24 bit VNI. */
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static void tunnel_id_to_vni(__be64 tun_id, __u8 *vni)
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{
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#ifdef __BIG_ENDIAN
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vni[0] = (__force __u8)(tun_id >> 16);
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vni[1] = (__force __u8)(tun_id >> 8);
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vni[2] = (__force __u8)tun_id;
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#else
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vni[0] = (__force __u8)((__force u64)tun_id >> 40);
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vni[1] = (__force __u8)((__force u64)tun_id >> 48);
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vni[2] = (__force __u8)((__force u64)tun_id >> 56);
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#endif
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}
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/* Convert 24 bit VNI to 64 bit tunnel ID. */
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static __be64 vni_to_tunnel_id(__u8 *vni)
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{
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#ifdef __BIG_ENDIAN
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return (vni[0] << 16) | (vni[1] << 8) | vni[2];
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#else
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return (__force __be64)(((__force u64)vni[0] << 40) |
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((__force u64)vni[1] << 48) |
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((__force u64)vni[2] << 56));
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#endif
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}
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static void geneve_rcv(struct geneve_sock *gs, struct sk_buff *skb)
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{
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struct vport *vport = gs->rcv_data;
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struct genevehdr *geneveh = geneve_hdr(skb);
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int opts_len;
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struct ovs_tunnel_info tun_info;
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__be64 key;
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__be16 flags;
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opts_len = geneveh->opt_len * 4;
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flags = TUNNEL_KEY | TUNNEL_OPTIONS_PRESENT |
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(udp_hdr(skb)->check != 0 ? TUNNEL_CSUM : 0) |
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(geneveh->oam ? TUNNEL_OAM : 0) |
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(geneveh->critical ? TUNNEL_CRIT_OPT : 0);
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key = vni_to_tunnel_id(geneveh->vni);
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ovs_flow_tun_info_init(&tun_info, ip_hdr(skb), key, flags,
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geneveh->options, opts_len);
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ovs_vport_receive(vport, skb, &tun_info);
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}
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static int geneve_get_options(const struct vport *vport,
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struct sk_buff *skb)
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{
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struct geneve_port *geneve_port = geneve_vport(vport);
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struct inet_sock *sk = inet_sk(geneve_port->gs->sock->sk);
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if (nla_put_u16(skb, OVS_TUNNEL_ATTR_DST_PORT, ntohs(sk->inet_sport)))
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return -EMSGSIZE;
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return 0;
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}
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static void geneve_tnl_destroy(struct vport *vport)
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{
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struct geneve_port *geneve_port = geneve_vport(vport);
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geneve_sock_release(geneve_port->gs);
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ovs_vport_deferred_free(vport);
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}
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static struct vport *geneve_tnl_create(const struct vport_parms *parms)
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{
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struct net *net = ovs_dp_get_net(parms->dp);
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struct nlattr *options = parms->options;
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struct geneve_port *geneve_port;
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struct geneve_sock *gs;
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struct vport *vport;
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struct nlattr *a;
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int err;
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u16 dst_port;
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if (!options) {
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err = -EINVAL;
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goto error;
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}
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a = nla_find_nested(options, OVS_TUNNEL_ATTR_DST_PORT);
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if (a && nla_len(a) == sizeof(u16)) {
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dst_port = nla_get_u16(a);
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} else {
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/* Require destination port from userspace. */
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err = -EINVAL;
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goto error;
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}
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vport = ovs_vport_alloc(sizeof(struct geneve_port),
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&ovs_geneve_vport_ops, parms);
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if (IS_ERR(vport))
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return vport;
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geneve_port = geneve_vport(vport);
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strncpy(geneve_port->name, parms->name, IFNAMSIZ);
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gs = geneve_sock_add(net, htons(dst_port), geneve_rcv, vport, true, 0);
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if (IS_ERR(gs)) {
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ovs_vport_free(vport);
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return (void *)gs;
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}
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geneve_port->gs = gs;
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return vport;
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error:
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return ERR_PTR(err);
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}
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static int geneve_tnl_send(struct vport *vport, struct sk_buff *skb)
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{
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struct ovs_key_ipv4_tunnel *tun_key;
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struct ovs_tunnel_info *tun_info;
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struct net *net = ovs_dp_get_net(vport->dp);
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struct geneve_port *geneve_port = geneve_vport(vport);
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__be16 dport = inet_sk(geneve_port->gs->sock->sk)->inet_sport;
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__be16 sport;
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struct rtable *rt;
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struct flowi4 fl;
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u8 vni[3];
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__be16 df;
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int err;
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tun_info = OVS_CB(skb)->egress_tun_info;
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if (unlikely(!tun_info)) {
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err = -EINVAL;
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goto error;
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}
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tun_key = &tun_info->tunnel;
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/* Route lookup */
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memset(&fl, 0, sizeof(fl));
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fl.daddr = tun_key->ipv4_dst;
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fl.saddr = tun_key->ipv4_src;
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fl.flowi4_tos = RT_TOS(tun_key->ipv4_tos);
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fl.flowi4_mark = skb->mark;
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fl.flowi4_proto = IPPROTO_UDP;
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rt = ip_route_output_key(net, &fl);
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if (IS_ERR(rt)) {
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err = PTR_ERR(rt);
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goto error;
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}
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df = tun_key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0;
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sport = udp_flow_src_port(net, skb, 1, USHRT_MAX, true);
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tunnel_id_to_vni(tun_key->tun_id, vni);
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skb->ignore_df = 1;
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err = geneve_xmit_skb(geneve_port->gs, rt, skb, fl.saddr,
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tun_key->ipv4_dst, tun_key->ipv4_tos,
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tun_key->ipv4_ttl, df, sport, dport,
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tun_key->tun_flags, vni,
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tun_info->options_len, (u8 *)tun_info->options,
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false);
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if (err < 0)
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ip_rt_put(rt);
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error:
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return err;
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}
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static const char *geneve_get_name(const struct vport *vport)
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{
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struct geneve_port *geneve_port = geneve_vport(vport);
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return geneve_port->name;
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}
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const struct vport_ops ovs_geneve_vport_ops = {
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.type = OVS_VPORT_TYPE_GENEVE,
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.create = geneve_tnl_create,
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.destroy = geneve_tnl_destroy,
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.get_name = geneve_get_name,
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.get_options = geneve_get_options,
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.send = geneve_tnl_send,
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};
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