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
498
net/bridge/br_mdb.c
Normal file
498
net/bridge/br_mdb.c
Normal file
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|
@ -0,0 +1,498 @@
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#include <linux/err.h>
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#include <linux/igmp.h>
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#include <linux/kernel.h>
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#include <linux/netdevice.h>
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#include <linux/rculist.h>
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#include <linux/skbuff.h>
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#include <linux/if_ether.h>
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#include <net/ip.h>
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#include <net/netlink.h>
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#if IS_ENABLED(CONFIG_IPV6)
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#include <net/ipv6.h>
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#include <net/addrconf.h>
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#endif
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#include "br_private.h"
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static int br_rports_fill_info(struct sk_buff *skb, struct netlink_callback *cb,
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struct net_device *dev)
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{
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struct net_bridge *br = netdev_priv(dev);
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struct net_bridge_port *p;
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struct nlattr *nest;
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if (!br->multicast_router || hlist_empty(&br->router_list))
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return 0;
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nest = nla_nest_start(skb, MDBA_ROUTER);
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if (nest == NULL)
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return -EMSGSIZE;
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hlist_for_each_entry_rcu(p, &br->router_list, rlist) {
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if (p && nla_put_u32(skb, MDBA_ROUTER_PORT, p->dev->ifindex))
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goto fail;
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}
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nla_nest_end(skb, nest);
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return 0;
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fail:
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nla_nest_cancel(skb, nest);
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return -EMSGSIZE;
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}
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static int br_mdb_fill_info(struct sk_buff *skb, struct netlink_callback *cb,
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struct net_device *dev)
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{
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struct net_bridge *br = netdev_priv(dev);
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struct net_bridge_mdb_htable *mdb;
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struct nlattr *nest, *nest2;
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int i, err = 0;
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int idx = 0, s_idx = cb->args[1];
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if (br->multicast_disabled)
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return 0;
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mdb = rcu_dereference(br->mdb);
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if (!mdb)
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return 0;
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nest = nla_nest_start(skb, MDBA_MDB);
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if (nest == NULL)
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return -EMSGSIZE;
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for (i = 0; i < mdb->max; i++) {
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struct net_bridge_mdb_entry *mp;
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struct net_bridge_port_group *p;
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struct net_bridge_port_group __rcu **pp;
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struct net_bridge_port *port;
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hlist_for_each_entry_rcu(mp, &mdb->mhash[i], hlist[mdb->ver]) {
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if (idx < s_idx)
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goto skip;
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nest2 = nla_nest_start(skb, MDBA_MDB_ENTRY);
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if (nest2 == NULL) {
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err = -EMSGSIZE;
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goto out;
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}
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for (pp = &mp->ports;
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(p = rcu_dereference(*pp)) != NULL;
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pp = &p->next) {
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port = p->port;
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if (port) {
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struct br_mdb_entry e;
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memset(&e, 0, sizeof(e));
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e.ifindex = port->dev->ifindex;
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e.state = p->state;
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if (p->addr.proto == htons(ETH_P_IP))
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e.addr.u.ip4 = p->addr.u.ip4;
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#if IS_ENABLED(CONFIG_IPV6)
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if (p->addr.proto == htons(ETH_P_IPV6))
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e.addr.u.ip6 = p->addr.u.ip6;
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#endif
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e.addr.proto = p->addr.proto;
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if (nla_put(skb, MDBA_MDB_ENTRY_INFO, sizeof(e), &e)) {
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nla_nest_cancel(skb, nest2);
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err = -EMSGSIZE;
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goto out;
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}
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}
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}
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nla_nest_end(skb, nest2);
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skip:
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idx++;
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}
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}
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out:
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cb->args[1] = idx;
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nla_nest_end(skb, nest);
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return err;
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}
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static int br_mdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
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{
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struct net_device *dev;
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struct net *net = sock_net(skb->sk);
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struct nlmsghdr *nlh = NULL;
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int idx = 0, s_idx;
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s_idx = cb->args[0];
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rcu_read_lock();
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/* In theory this could be wrapped to 0... */
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cb->seq = net->dev_base_seq + br_mdb_rehash_seq;
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for_each_netdev_rcu(net, dev) {
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if (dev->priv_flags & IFF_EBRIDGE) {
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struct br_port_msg *bpm;
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if (idx < s_idx)
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goto skip;
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nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid,
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cb->nlh->nlmsg_seq, RTM_GETMDB,
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sizeof(*bpm), NLM_F_MULTI);
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if (nlh == NULL)
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break;
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bpm = nlmsg_data(nlh);
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memset(bpm, 0, sizeof(*bpm));
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bpm->ifindex = dev->ifindex;
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if (br_mdb_fill_info(skb, cb, dev) < 0)
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goto out;
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if (br_rports_fill_info(skb, cb, dev) < 0)
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goto out;
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cb->args[1] = 0;
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nlmsg_end(skb, nlh);
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skip:
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idx++;
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}
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}
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out:
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if (nlh)
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nlmsg_end(skb, nlh);
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rcu_read_unlock();
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cb->args[0] = idx;
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return skb->len;
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}
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static int nlmsg_populate_mdb_fill(struct sk_buff *skb,
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struct net_device *dev,
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struct br_mdb_entry *entry, u32 pid,
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u32 seq, int type, unsigned int flags)
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{
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struct nlmsghdr *nlh;
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struct br_port_msg *bpm;
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struct nlattr *nest, *nest2;
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nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), NLM_F_MULTI);
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if (!nlh)
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return -EMSGSIZE;
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bpm = nlmsg_data(nlh);
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memset(bpm, 0, sizeof(*bpm));
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bpm->family = AF_BRIDGE;
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bpm->ifindex = dev->ifindex;
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nest = nla_nest_start(skb, MDBA_MDB);
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if (nest == NULL)
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goto cancel;
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nest2 = nla_nest_start(skb, MDBA_MDB_ENTRY);
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if (nest2 == NULL)
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goto end;
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if (nla_put(skb, MDBA_MDB_ENTRY_INFO, sizeof(*entry), entry))
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goto end;
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nla_nest_end(skb, nest2);
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nla_nest_end(skb, nest);
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return nlmsg_end(skb, nlh);
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end:
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nla_nest_end(skb, nest);
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cancel:
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nlmsg_cancel(skb, nlh);
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return -EMSGSIZE;
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}
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static inline size_t rtnl_mdb_nlmsg_size(void)
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{
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return NLMSG_ALIGN(sizeof(struct br_port_msg))
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+ nla_total_size(sizeof(struct br_mdb_entry));
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}
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static void __br_mdb_notify(struct net_device *dev, struct br_mdb_entry *entry,
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int type)
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{
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struct net *net = dev_net(dev);
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struct sk_buff *skb;
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int err = -ENOBUFS;
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skb = nlmsg_new(rtnl_mdb_nlmsg_size(), GFP_ATOMIC);
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if (!skb)
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goto errout;
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err = nlmsg_populate_mdb_fill(skb, dev, entry, 0, 0, type, NTF_SELF);
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if (err < 0) {
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kfree_skb(skb);
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goto errout;
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}
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rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC);
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return;
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errout:
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rtnl_set_sk_err(net, RTNLGRP_MDB, err);
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}
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void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
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struct br_ip *group, int type)
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{
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struct br_mdb_entry entry;
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memset(&entry, 0, sizeof(entry));
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entry.ifindex = port->dev->ifindex;
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entry.addr.proto = group->proto;
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entry.addr.u.ip4 = group->u.ip4;
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#if IS_ENABLED(CONFIG_IPV6)
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entry.addr.u.ip6 = group->u.ip6;
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#endif
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__br_mdb_notify(dev, &entry, type);
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}
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static bool is_valid_mdb_entry(struct br_mdb_entry *entry)
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{
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if (entry->ifindex == 0)
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return false;
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if (entry->addr.proto == htons(ETH_P_IP)) {
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if (!ipv4_is_multicast(entry->addr.u.ip4))
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return false;
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if (ipv4_is_local_multicast(entry->addr.u.ip4))
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return false;
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#if IS_ENABLED(CONFIG_IPV6)
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} else if (entry->addr.proto == htons(ETH_P_IPV6)) {
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if (ipv6_addr_is_ll_all_nodes(&entry->addr.u.ip6))
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return false;
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#endif
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} else
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return false;
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if (entry->state != MDB_PERMANENT && entry->state != MDB_TEMPORARY)
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return false;
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return true;
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}
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static int br_mdb_parse(struct sk_buff *skb, struct nlmsghdr *nlh,
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struct net_device **pdev, struct br_mdb_entry **pentry)
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{
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struct net *net = sock_net(skb->sk);
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struct br_mdb_entry *entry;
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struct br_port_msg *bpm;
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struct nlattr *tb[MDBA_SET_ENTRY_MAX+1];
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struct net_device *dev;
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int err;
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err = nlmsg_parse(nlh, sizeof(*bpm), tb, MDBA_SET_ENTRY, NULL);
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if (err < 0)
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return err;
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bpm = nlmsg_data(nlh);
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if (bpm->ifindex == 0) {
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pr_info("PF_BRIDGE: br_mdb_parse() with invalid ifindex\n");
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return -EINVAL;
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}
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dev = __dev_get_by_index(net, bpm->ifindex);
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if (dev == NULL) {
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pr_info("PF_BRIDGE: br_mdb_parse() with unknown ifindex\n");
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return -ENODEV;
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}
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if (!(dev->priv_flags & IFF_EBRIDGE)) {
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pr_info("PF_BRIDGE: br_mdb_parse() with non-bridge\n");
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return -EOPNOTSUPP;
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}
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||||
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*pdev = dev;
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||||
|
||||
if (!tb[MDBA_SET_ENTRY] ||
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||||
nla_len(tb[MDBA_SET_ENTRY]) != sizeof(struct br_mdb_entry)) {
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||||
pr_info("PF_BRIDGE: br_mdb_parse() with invalid attr\n");
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||||
return -EINVAL;
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||||
}
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||||
|
||||
entry = nla_data(tb[MDBA_SET_ENTRY]);
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||||
if (!is_valid_mdb_entry(entry)) {
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||||
pr_info("PF_BRIDGE: br_mdb_parse() with invalid entry\n");
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||||
return -EINVAL;
|
||||
}
|
||||
|
||||
*pentry = entry;
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||||
return 0;
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||||
}
|
||||
|
||||
static int br_mdb_add_group(struct net_bridge *br, struct net_bridge_port *port,
|
||||
struct br_ip *group, unsigned char state)
|
||||
{
|
||||
struct net_bridge_mdb_entry *mp;
|
||||
struct net_bridge_port_group *p;
|
||||
struct net_bridge_port_group __rcu **pp;
|
||||
struct net_bridge_mdb_htable *mdb;
|
||||
int err;
|
||||
|
||||
mdb = mlock_dereference(br->mdb, br);
|
||||
mp = br_mdb_ip_get(mdb, group);
|
||||
if (!mp) {
|
||||
mp = br_multicast_new_group(br, port, group);
|
||||
err = PTR_ERR(mp);
|
||||
if (IS_ERR(mp))
|
||||
return err;
|
||||
}
|
||||
|
||||
for (pp = &mp->ports;
|
||||
(p = mlock_dereference(*pp, br)) != NULL;
|
||||
pp = &p->next) {
|
||||
if (p->port == port)
|
||||
return -EEXIST;
|
||||
if ((unsigned long)p->port < (unsigned long)port)
|
||||
break;
|
||||
}
|
||||
|
||||
p = br_multicast_new_port_group(port, group, *pp, state);
|
||||
if (unlikely(!p))
|
||||
return -ENOMEM;
|
||||
rcu_assign_pointer(*pp, p);
|
||||
|
||||
br_mdb_notify(br->dev, port, group, RTM_NEWMDB);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __br_mdb_add(struct net *net, struct net_bridge *br,
|
||||
struct br_mdb_entry *entry)
|
||||
{
|
||||
struct br_ip ip;
|
||||
struct net_device *dev;
|
||||
struct net_bridge_port *p;
|
||||
int ret;
|
||||
|
||||
if (!netif_running(br->dev) || br->multicast_disabled)
|
||||
return -EINVAL;
|
||||
|
||||
dev = __dev_get_by_index(net, entry->ifindex);
|
||||
if (!dev)
|
||||
return -ENODEV;
|
||||
|
||||
p = br_port_get_rtnl(dev);
|
||||
if (!p || p->br != br || p->state == BR_STATE_DISABLED)
|
||||
return -EINVAL;
|
||||
|
||||
ip.proto = entry->addr.proto;
|
||||
if (ip.proto == htons(ETH_P_IP))
|
||||
ip.u.ip4 = entry->addr.u.ip4;
|
||||
#if IS_ENABLED(CONFIG_IPV6)
|
||||
else
|
||||
ip.u.ip6 = entry->addr.u.ip6;
|
||||
#endif
|
||||
|
||||
spin_lock_bh(&br->multicast_lock);
|
||||
ret = br_mdb_add_group(br, p, &ip, entry->state);
|
||||
spin_unlock_bh(&br->multicast_lock);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int br_mdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
|
||||
{
|
||||
struct net *net = sock_net(skb->sk);
|
||||
struct br_mdb_entry *entry;
|
||||
struct net_device *dev;
|
||||
struct net_bridge *br;
|
||||
int err;
|
||||
|
||||
err = br_mdb_parse(skb, nlh, &dev, &entry);
|
||||
if (err < 0)
|
||||
return err;
|
||||
|
||||
br = netdev_priv(dev);
|
||||
|
||||
err = __br_mdb_add(net, br, entry);
|
||||
if (!err)
|
||||
__br_mdb_notify(dev, entry, RTM_NEWMDB);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int __br_mdb_del(struct net_bridge *br, struct br_mdb_entry *entry)
|
||||
{
|
||||
struct net_bridge_mdb_htable *mdb;
|
||||
struct net_bridge_mdb_entry *mp;
|
||||
struct net_bridge_port_group *p;
|
||||
struct net_bridge_port_group __rcu **pp;
|
||||
struct br_ip ip;
|
||||
int err = -EINVAL;
|
||||
|
||||
if (!netif_running(br->dev) || br->multicast_disabled)
|
||||
return -EINVAL;
|
||||
|
||||
ip.proto = entry->addr.proto;
|
||||
if (ip.proto == htons(ETH_P_IP)) {
|
||||
if (timer_pending(&br->ip4_other_query.timer))
|
||||
return -EBUSY;
|
||||
|
||||
ip.u.ip4 = entry->addr.u.ip4;
|
||||
#if IS_ENABLED(CONFIG_IPV6)
|
||||
} else {
|
||||
if (timer_pending(&br->ip6_other_query.timer))
|
||||
return -EBUSY;
|
||||
|
||||
ip.u.ip6 = entry->addr.u.ip6;
|
||||
#endif
|
||||
}
|
||||
|
||||
spin_lock_bh(&br->multicast_lock);
|
||||
mdb = mlock_dereference(br->mdb, br);
|
||||
|
||||
mp = br_mdb_ip_get(mdb, &ip);
|
||||
if (!mp)
|
||||
goto unlock;
|
||||
|
||||
for (pp = &mp->ports;
|
||||
(p = mlock_dereference(*pp, br)) != NULL;
|
||||
pp = &p->next) {
|
||||
if (!p->port || p->port->dev->ifindex != entry->ifindex)
|
||||
continue;
|
||||
|
||||
if (p->port->state == BR_STATE_DISABLED)
|
||||
goto unlock;
|
||||
|
||||
rcu_assign_pointer(*pp, p->next);
|
||||
hlist_del_init(&p->mglist);
|
||||
del_timer(&p->timer);
|
||||
call_rcu_bh(&p->rcu, br_multicast_free_pg);
|
||||
err = 0;
|
||||
|
||||
if (!mp->ports && !mp->mglist &&
|
||||
netif_running(br->dev))
|
||||
mod_timer(&mp->timer, jiffies);
|
||||
break;
|
||||
}
|
||||
|
||||
unlock:
|
||||
spin_unlock_bh(&br->multicast_lock);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int br_mdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
|
||||
{
|
||||
struct net_device *dev;
|
||||
struct br_mdb_entry *entry;
|
||||
struct net_bridge *br;
|
||||
int err;
|
||||
|
||||
err = br_mdb_parse(skb, nlh, &dev, &entry);
|
||||
if (err < 0)
|
||||
return err;
|
||||
|
||||
br = netdev_priv(dev);
|
||||
|
||||
err = __br_mdb_del(br, entry);
|
||||
if (!err)
|
||||
__br_mdb_notify(dev, entry, RTM_DELMDB);
|
||||
return err;
|
||||
}
|
||||
|
||||
void br_mdb_init(void)
|
||||
{
|
||||
rtnl_register(PF_BRIDGE, RTM_GETMDB, NULL, br_mdb_dump, NULL);
|
||||
rtnl_register(PF_BRIDGE, RTM_NEWMDB, br_mdb_add, NULL, NULL);
|
||||
rtnl_register(PF_BRIDGE, RTM_DELMDB, br_mdb_del, NULL, NULL);
|
||||
}
|
||||
|
||||
void br_mdb_uninit(void)
|
||||
{
|
||||
rtnl_unregister(PF_BRIDGE, RTM_GETMDB);
|
||||
rtnl_unregister(PF_BRIDGE, RTM_NEWMDB);
|
||||
rtnl_unregister(PF_BRIDGE, RTM_DELMDB);
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue