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mptcp: set fullmesh flag in pm_netlink

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This patch added the fullmesh flag setting support in pm_netlink.

If the fullmesh flag of the address is changed, remove all the related
subflows, update the fullmesh flag and create subflows again.

Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Geliang Tang <geliang.tang@suse.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Geliang Tang 2022-02-02 17:03:41 -08:00 committed by David S. Miller
parent 9ddd1cac6f
commit 73c762c1f0
1 changed files with 28 additions and 9 deletions
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37
net/mptcp/pm_netlink.c
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@ -1728,9 +1728,20 @@ fail:
return -EMSGSIZE;
}
static int mptcp_nl_addr_backup(struct net *net,
struct mptcp_addr_info *addr,
u8 bkup)
static void mptcp_pm_nl_fullmesh(struct mptcp_sock *msk,
struct mptcp_addr_info *addr)
{
struct mptcp_rm_list list = { .nr = 0 };
list.ids[list.nr++] = addr->id;
mptcp_pm_nl_rm_subflow_received(msk, &list);
mptcp_pm_create_subflow_or_signal_addr(msk);
}
static int mptcp_nl_set_flags(struct net *net,
struct mptcp_addr_info *addr,
u8 bkup, u8 changed)
{
long s_slot = 0, s_num = 0;
struct mptcp_sock *msk;
@ -1744,7 +1755,10 @@ static int mptcp_nl_addr_backup(struct net *net,
lock_sock(sk);
spin_lock_bh(&msk->pm.lock);
ret = mptcp_pm_nl_mp_prio_send_ack(msk, addr, bkup);
if (changed & MPTCP_PM_ADDR_FLAG_BACKUP)
ret = mptcp_pm_nl_mp_prio_send_ack(msk, addr, bkup);
if (changed & MPTCP_PM_ADDR_FLAG_FULLMESH)
mptcp_pm_nl_fullmesh(msk, addr);
spin_unlock_bh(&msk->pm.lock);
release_sock(sk);
@ -1761,6 +1775,8 @@ static int mptcp_nl_cmd_set_flags(struct sk_buff *skb, struct genl_info *info)
struct mptcp_pm_addr_entry addr = { .addr = { .family = AF_UNSPEC }, }, *entry;
struct nlattr *attr = info->attrs[MPTCP_PM_ATTR_ADDR];
struct pm_nl_pernet *pernet = genl_info_pm_nl(info);
u8 changed, mask = MPTCP_PM_ADDR_FLAG_BACKUP |
MPTCP_PM_ADDR_FLAG_FULLMESH;
struct net *net = sock_net(skb->sk);
u8 bkup = 0, lookup_by_id = 0;
int ret;
@ -1783,15 +1799,18 @@ static int mptcp_nl_cmd_set_flags(struct sk_buff *skb, struct genl_info *info)
spin_unlock_bh(&pernet->lock);
return -EINVAL;
}
if ((addr.flags & MPTCP_PM_ADDR_FLAG_FULLMESH) &&
(entry->flags & MPTCP_PM_ADDR_FLAG_SIGNAL)) {
spin_unlock_bh(&pernet->lock);
return -EINVAL;
}
if (bkup)
entry->flags |= MPTCP_PM_ADDR_FLAG_BACKUP;
else
entry->flags &= ~MPTCP_PM_ADDR_FLAG_BACKUP;
changed = (addr.flags ^ entry->flags) & mask;
entry->flags = (entry->flags & ~mask) | (addr.flags & mask);
addr = *entry;
spin_unlock_bh(&pernet->lock);
mptcp_nl_addr_backup(net, &addr.addr, bkup);
mptcp_nl_set_flags(net, &addr.addr, bkup, changed);
return 0;
}