From: Yonglong Li liyonglong@chinatelecom.cn
[ Upstream commit 119c022096f5805680c79dfa74e15044c289856d ]
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 geliangtang@gmail.com Signed-off-by: Geliang Tang geliangtang@gmail.com Signed-off-by: Yonglong Li liyonglong@chinatelecom.cn Signed-off-by: Mat Martineau mathew.j.martineau@linux.intel.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- net/mptcp/pm.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/net/mptcp/pm.c b/net/mptcp/pm.c index 9d00fa6d22e9..feecc3485c68 100644 --- a/net/mptcp/pm.c +++ b/net/mptcp/pm.c @@ -253,6 +253,7 @@ bool mptcp_pm_add_addr_signal(struct mptcp_sock *msk, unsigned int remaining, struct mptcp_addr_info *saddr, bool *echo, bool *port) { int ret = false; + u8 add_addr;
spin_lock_bh(&msk->pm.lock);
@@ -267,7 +268,11 @@ bool mptcp_pm_add_addr_signal(struct mptcp_sock *msk, unsigned int remaining, 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: @@ -279,6 +284,7 @@ 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);
@@ -286,16 +292,17 @@ 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: