From 119c022096f5805680c79dfa74e15044c289856d Mon Sep 17 00:00:00 2001 From: Yonglong Li Date: Mon, 23 Aug 2021 18:05:41 -0700 Subject: mptcp: fix ADD_ADDR and RM_ADDR maybe flush addr_signal each other ADD_ADDR shares pm.addr_signal with RM_ADDR, so after RM_ADDR/ADD_ADDR has done, we should not clean ADD_ADDR/RM_ADDR's addr_signal. Co-developed-by: Geliang Tang Signed-off-by: Geliang Tang Signed-off-by: Yonglong Li Signed-off-by: Mat Martineau Signed-off-by: David S. Miller --- net/mptcp/pm.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) (limited to 'net/mptcp') diff --git a/net/mptcp/pm.c b/net/mptcp/pm.c index b1727cef1cfd..bc03c08eeee5 100644 --- a/net/mptcp/pm.c +++ b/net/mptcp/pm.c @@ -261,6 +261,7 @@ bool mptcp_pm_add_addr_signal(struct mptcp_sock *msk, struct sk_buff *skb, bool *port, bool *drop_other_suboptions) { int ret = false; + u8 add_addr; spin_lock_bh(&msk->pm.lock); @@ -284,7 +285,11 @@ bool mptcp_pm_add_addr_signal(struct mptcp_sock *msk, struct sk_buff *skb, goto out_unlock; *saddr = msk->pm.local; - WRITE_ONCE(msk->pm.addr_signal, 0); + if (*echo) + add_addr = msk->pm.addr_signal & ~BIT(MPTCP_ADD_ADDR_ECHO); + else + add_addr = msk->pm.addr_signal & ~BIT(MPTCP_ADD_ADDR_SIGNAL); + WRITE_ONCE(msk->pm.addr_signal, add_addr); ret = true; out_unlock: @@ -296,6 +301,7 @@ bool mptcp_pm_rm_addr_signal(struct mptcp_sock *msk, unsigned int remaining, struct mptcp_rm_list *rm_list) { int ret = false, len; + u8 rm_addr; spin_lock_bh(&msk->pm.lock); @@ -303,16 +309,17 @@ bool mptcp_pm_rm_addr_signal(struct mptcp_sock *msk, unsigned int remaining, if (!mptcp_pm_should_rm_signal(msk)) goto out_unlock; + rm_addr = msk->pm.addr_signal & ~BIT(MPTCP_RM_ADDR_SIGNAL); len = mptcp_rm_addr_len(&msk->pm.rm_list_tx); if (len < 0) { - WRITE_ONCE(msk->pm.addr_signal, 0); + WRITE_ONCE(msk->pm.addr_signal, rm_addr); goto out_unlock; } if (remaining < len) goto out_unlock; *rm_list = msk->pm.rm_list_tx; - WRITE_ONCE(msk->pm.addr_signal, 0); + WRITE_ONCE(msk->pm.addr_signal, rm_addr); ret = true; out_unlock: -- cgit v1.2.3-59-g8ed1b