From patchwork Tue Jun 15 01:31:07 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: YonglongLi X-Patchwork-Id: 12320341 X-Patchwork-Delegate: mat@martineau.name Received: from chinatelecom.cn (prt-mail.chinatelecom.cn [42.123.76.228]) by smtp.subspace.kernel.org (Postfix) with ESMTP id E07436D0E for ; Tue, 15 Jun 2021 01:31:58 +0000 (UTC) HMM_SOURCE_IP: 172.18.0.48:47600.979462537 HMM_ATTACHE_NUM: 0000 HMM_SOURCE_TYPE: SMTP Received: from clientip-36.111.140.9?logid-9560eed8f72e4db192816cedc0cdf155 (unknown [172.18.0.48]) by chinatelecom.cn (HERMES) with SMTP id D3C04280132; Tue, 15 Jun 2021 09:31:51 +0800 (CST) X-189-SAVE-TO-SEND: +liyonglong@chinatelecom.cn Received: from ([172.18.0.48]) by app0024 with ESMTP id 7bd96e17fd084a62bd7a95b9abada001 for mptcp@lists.linux.dev; Tue Jun 15 09:31:57 2021 X-Transaction-ID: 7bd96e17fd084a62bd7a95b9abada001 X-filter-score: filter<0> X-Real-From: liyonglong@chinatelecom.cn X-Receive-IP: 172.18.0.48 X-MEDUSA-Status: 0 Sender: liyonglong@chinatelecom.cn From: Yonglong Li To: mptcp@lists.linux.dev Cc: pabeni@redhat.com, matthieu.baerts@tessares.net, mathew.j.martineau@linux.intel.com, geliangtang@gmail.com, Yonglong Li Subject: [PATCH v2 1/4] mptcp: fix ADD_ADDR and RM_ADDR maybe flush addr_signal each other Date: Tue, 15 Jun 2021 09:31:07 +0800 Message-Id: <1623720670-73539-2-git-send-email-liyonglong@chinatelecom.cn> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1623720670-73539-1-git-send-email-liyonglong@chinatelecom.cn> References: <1623720670-73539-1-git-send-email-liyonglong@chinatelecom.cn> X-Mailing-List: mptcp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 ADD_ADDR share pm.addr_signal with RM_ADDR, so after RM_ADDR/ADD_ADDR done we should not clean ADD_ADDR/RM_ADDR's addr_signal. Signed-off-by: Yonglong Li --- net/mptcp/pm.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/net/mptcp/pm.c b/net/mptcp/pm.c index 9d00fa6..74886a3 100644 --- a/net/mptcp/pm.c +++ b/net/mptcp/pm.c @@ -252,6 +252,7 @@ void mptcp_pm_mp_prio_received(struct sock *sk, u8 bkup) bool mptcp_pm_add_addr_signal(struct mptcp_sock *msk, unsigned int remaining, struct mptcp_addr_info *saddr, bool *echo, bool *port) { + u8 add_addr; int ret = false; spin_lock_bh(&msk->pm.lock); @@ -267,7 +268,8 @@ 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); + add_addr = msk->pm.addr_signal & BIT(MPTCP_RM_ADDR_SIGNAL); + WRITE_ONCE(msk->pm.addr_signal, add_addr); ret = true; out_unlock: @@ -278,6 +280,7 @@ bool mptcp_pm_add_addr_signal(struct mptcp_sock *msk, unsigned int remaining, bool mptcp_pm_rm_addr_signal(struct mptcp_sock *msk, unsigned int remaining, struct mptcp_rm_list *rm_list) { + u8 rm_addr; int ret = false, len; spin_lock_bh(&msk->pm.lock); @@ -286,16 +289,17 @@ 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: