From 09f12c3ab7a5dc30c4efc6a530891f377d9ba1f4 Mon Sep 17 00:00:00 2001 From: Geliang Tang Date: Fri, 4 Feb 2022 16:03:29 -0800 Subject: [PATCH] mptcp: allow to use port and non-signal in set_flags 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 Signed-off-by: Mat Martineau Signed-off-by: Jakub Kicinski --- net/mptcp/pm_netlink.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-) diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c index d477957..5464c2d 100644 --- a/net/mptcp/pm_netlink.c +++ b/net/mptcp/pm_netlink.c @@ -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"); -- 2.7.4