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mptcp: allow to use port and non-signal in set_flags

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It's illegal to use both port and non-signal flags for adding address.
But it's legal to use both of them for setting flags, which always uses
non-signal flags, backup or fullmesh.

This patch moves this non-signal flag with port check from
mptcp_pm_parse_addr() to mptcp_nl_cmd_add_addr(). Do the check only when
adding addresses, not setting flags or deleting addresses.

Signed-off-by: Geliang Tang <geliang.tang@suse.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:
Geliang Tang 2022-02-04 16:03:29 -08:00 committed by Jakub Kicinski
parent 660a38bf6f
commit 09f12c3ab7
1 changed files with 6 additions and 7 deletions
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13
net/mptcp/pm_netlink.c
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@ -1174,14 +1174,8 @@ skip_family:
if (tb[MPTCP_PM_ADDR_ATTR_FLAGS])
entry->flags = nla_get_u32(tb[MPTCP_PM_ADDR_ATTR_FLAGS]);
if (tb[MPTCP_PM_ADDR_ATTR_PORT]) {
if (!(entry->flags & MPTCP_PM_ADDR_FLAG_SIGNAL)) {
NL_SET_ERR_MSG_ATTR(info->extack, attr,
"flags must have signal when using port");
return -EINVAL;
}
if (tb[MPTCP_PM_ADDR_ATTR_PORT])
entry->addr.port = htons(nla_get_u16(tb[MPTCP_PM_ADDR_ATTR_PORT]));
}
return 0;
}
@ -1227,6 +1221,11 @@ static int mptcp_nl_cmd_add_addr(struct sk_buff *skb, struct genl_info *info)
if (ret < 0)
return ret;
if (addr.addr.port && !(addr.flags & MPTCP_PM_ADDR_FLAG_SIGNAL)) {
GENL_SET_ERR_MSG(info, "flags must have signal when using port");
return -EINVAL;
}
entry = kmalloc(sizeof(*entry), GFP_KERNEL);
if (!entry) {
GENL_SET_ERR_MSG(info, "can't allocate addr");