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mptcp: allow changing the "backup" bit by endpoint id

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a non-zero 'id' is sufficient to identify MPTCP endpoints: allow changing
the value of 'backup' bit by simply specifying the endpoint id.

Link: https://github.com/multipath-tcp/mptcp_net-next/issues/158
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Davide Caratti 2021-12-03 14:35:36 -08:00 committed by Jakub Kicinski
parent b51880568f
commit 602837e847
1 changed files with 10 additions and 4 deletions
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14
net/mptcp/pm_netlink.c
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@ -1702,22 +1702,28 @@ next:
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);
struct mptcp_pm_addr_entry addr, *entry;
struct net *net = sock_net(skb->sk);
u8 bkup = 0;
u8 bkup = 0, lookup_by_id = 0;
int ret;
ret = mptcp_pm_parse_addr(attr, info, true, &addr);
ret = mptcp_pm_parse_addr(attr, info, false, &addr);
if (ret < 0)
return ret;
if (addr.flags & MPTCP_PM_ADDR_FLAG_BACKUP)
bkup = 1;
if (addr.addr.family == AF_UNSPEC) {
lookup_by_id = 1;
if (!addr.addr.id)
return -EOPNOTSUPP;
}
list_for_each_entry(entry, &pernet->local_addr_list, list) {
if (addresses_equal(&entry->addr, &addr.addr, true)) {
if ((!lookup_by_id && addresses_equal(&entry->addr, &addr.addr, true)) ||
(lookup_by_id && entry->addr.id == addr.addr.id)) {
mptcp_nl_addr_backup(net, &entry->addr, bkup);
if (bkup)