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authorGeliang Tang2023-10-25 16:37:04 -0700
committerJakub Kicinski2023-10-27 08:47:17 -0700
commit84c531f54ad9a124a924c9505d74e33d16965146 (patch)
tree9d347a53e26590d00cc2ee430d823182835b938c /net
parent9168ea02b898d3dde98b51e4bd3fb082bd438dab (diff)
mptcp: userspace pm send RM_ADDR for ID 0
This patch adds the ability to send RM_ADDR for local ID 0. Check whether id 0 address is removed, if not, put id 0 into a removing list, pass it to mptcp_pm_remove_addr() to remove id 0 address. There is no reason not to allow the userspace to remove the initial address (ID 0). This special case was not taken into account not letting the userspace to delete all addresses as announced. Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/379 Reviewed-by: Matthieu Baerts <matttbe@kernel.org> Signed-off-by: Geliang Tang <geliang.tang@suse.com> Signed-off-by: Mat Martineau <martineau@kernel.org> Link: https://lore.kernel.org/r/20231025-send-net-next-20231025-v1-3-db8f25f798eb@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net')
-rw-r--r--net/mptcp/pm_userspace.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/net/mptcp/pm_userspace.c b/net/mptcp/pm_userspace.c
index 0f92e5b13a8a..25fa37ac3620 100644
--- a/net/mptcp/pm_userspace.c
+++ b/net/mptcp/pm_userspace.c
@@ -208,6 +208,40 @@ int mptcp_pm_nl_announce_doit(struct sk_buff *skb, struct genl_info *info)
return err;
}
+static int mptcp_userspace_pm_remove_id_zero_address(struct mptcp_sock *msk,
+ struct genl_info *info)
+{
+ struct mptcp_rm_list list = { .nr = 0 };
+ struct mptcp_subflow_context *subflow;
+ struct sock *sk = (struct sock *)msk;
+ bool has_id_0 = false;
+ int err = -EINVAL;
+
+ lock_sock(sk);
+ mptcp_for_each_subflow(msk, subflow) {
+ if (subflow->local_id == 0) {
+ has_id_0 = true;
+ break;
+ }
+ }
+ if (!has_id_0) {
+ GENL_SET_ERR_MSG(info, "address with id 0 not found");
+ goto remove_err;
+ }
+
+ list.ids[list.nr++] = 0;
+
+ spin_lock_bh(&msk->pm.lock);
+ mptcp_pm_remove_addr(msk, &list);
+ spin_unlock_bh(&msk->pm.lock);
+
+ err = 0;
+
+remove_err:
+ release_sock(sk);
+ return err;
+}
+
int mptcp_pm_nl_remove_doit(struct sk_buff *skb, struct genl_info *info)
{
struct nlattr *token = info->attrs[MPTCP_PM_ATTR_TOKEN];
@@ -239,6 +273,11 @@ int mptcp_pm_nl_remove_doit(struct sk_buff *skb, struct genl_info *info)
goto remove_err;
}
+ if (id_val == 0) {
+ err = mptcp_userspace_pm_remove_id_zero_address(msk, info);
+ goto remove_err;
+ }
+
lock_sock((struct sock *)msk);
list_for_each_entry(entry, &msk->pm.userspace_pm_local_addr_list, list) {