From patchwork Wed Jun 22 17:55:46 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kishen Maloor X-Patchwork-Id: 12891288 Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 055A51869 for ; Wed, 22 Jun 2022 18:17:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1655921864; x=1687457864; h=from:to:subject:date:message-id:in-reply-to:references: mime-version:content-transfer-encoding; bh=vvj/lpl/Ht10ibAe0ySlf5CaHdJ3WbdmdDTNHjVhBHM=; b=nWATSIYzv57xokOSA3HrEmp0diOyaIHtT+0daa2njxvAp303ZhsVn+Ra zfote3EWzIMF4D1ignyKo5sgYz3ZwBDdIdCqu7NT5uiebylvvRg2qgPMC +MkJY6zd/SlseuYNRpvgqYEFCUmumCXgSwsZ+RzkQB3WLz698ydL2P2p9 Iby0KfDDU0/nj6TJ04Zb0ui0p80tNb2JXHfSLiHCyj0AmRFo9WN+QLxws mEEc8aabvR7W83fGdHpV5fqJv4GEf2MIpcNP+wctBTcVuiZRpzC9CuiWM jcDr2BlpNeYUhdg44SEXqQRrqYBoMvW5fMqRN/xfC9wlYq/Mq9RsKZ9JT w==; X-IronPort-AV: E=McAfee;i="6400,9594,10386"; a="344490527" X-IronPort-AV: E=Sophos;i="5.92,212,1650956400"; d="scan'208";a="344490527" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Jun 2022 10:55:55 -0700 X-IronPort-AV: E=Sophos;i="5.92,212,1650956400"; d="scan'208";a="592302701" Received: from otc-tsn-4.jf.intel.com ([10.23.153.135]) by fmsmga007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Jun 2022 10:55:53 -0700 From: Kishen Maloor To: kishen.maloor@intel.com, mptcp@lists.linux.dev Subject: [PATCH mptcp-net 1/2] mptcp: netlink: issue MP_PRIO signals from userspace PMs Date: Wed, 22 Jun 2022 13:55:46 -0400 Message-Id: <20220622175547.289717-2-kishen.maloor@intel.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20220622175547.289717-1-kishen.maloor@intel.com> References: <20220622175547.289717-1-kishen.maloor@intel.com> Precedence: bulk X-Mailing-List: mptcp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 This change updates MPTCP_PM_CMD_SET_FLAGS to allow userspace PMs to issue MP_PRIO signals for a specified address ID over a chosen (by token) MPTCP connection. Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/286 Fixes: 702c2f646d42 ("mptcp: netlink: allow userspace-driven subflow establishment") Signed-off-by: Kishen Maloor --- net/mptcp/pm_netlink.c | 23 +++++++++++++++++------ net/mptcp/pm_userspace.c | 30 ++++++++++++++++++++++++++++++ net/mptcp/protocol.h | 6 +++++- 3 files changed, 52 insertions(+), 7 deletions(-) diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c index e099f2a12504..063700ff8cbb 100644 --- a/net/mptcp/pm_netlink.c +++ b/net/mptcp/pm_netlink.c @@ -717,9 +717,9 @@ void mptcp_pm_nl_addr_send_ack(struct mptcp_sock *msk) } } -static int mptcp_pm_nl_mp_prio_send_ack(struct mptcp_sock *msk, - struct mptcp_addr_info *addr, - u8 bkup) +int mptcp_pm_nl_mp_prio_send_ack(struct mptcp_sock *msk, + struct mptcp_addr_info *addr, + u8 bkup, bool use_id) { struct mptcp_subflow_context *subflow; @@ -730,10 +730,15 @@ static int mptcp_pm_nl_mp_prio_send_ack(struct mptcp_sock *msk, struct sock *sk = (struct sock *)msk; struct mptcp_addr_info local; - local_address((struct sock_common *)ssk, &local); - if (!mptcp_addresses_equal(&local, addr, addr->port)) + if (use_id && subflow->local_id != addr->id) continue; + if (!use_id) { + local_address((struct sock_common *)ssk, &local); + if (!mptcp_addresses_equal(&local, addr, addr->port)) + continue; + } + if (subflow->backup != bkup) msk->last_snd = NULL; subflow->backup = bkup; @@ -1837,7 +1842,7 @@ static int mptcp_nl_set_flags(struct net *net, lock_sock(sk); spin_lock_bh(&msk->pm.lock); if (changed & MPTCP_PM_ADDR_FLAG_BACKUP) - ret = mptcp_pm_nl_mp_prio_send_ack(msk, addr, bkup); + ret = mptcp_pm_nl_mp_prio_send_ack(msk, addr, bkup, false); if (changed & MPTCP_PM_ADDR_FLAG_FULLMESH) mptcp_pm_nl_fullmesh(msk, addr); spin_unlock_bh(&msk->pm.lock); @@ -1854,6 +1859,7 @@ static int mptcp_nl_set_flags(struct net *net, static int mptcp_nl_cmd_set_flags(struct sk_buff *skb, struct genl_info *info) { struct mptcp_pm_addr_entry addr = { .addr = { .family = AF_UNSPEC }, }, *entry; + struct nlattr *token = info->attrs[MPTCP_PM_ATTR_TOKEN]; struct nlattr *attr = info->attrs[MPTCP_PM_ATTR_ADDR]; struct pm_nl_pernet *pernet = genl_info_pm_nl(info); u8 changed, mask = MPTCP_PM_ADDR_FLAG_BACKUP | @@ -1868,6 +1874,11 @@ static int mptcp_nl_cmd_set_flags(struct sk_buff *skb, struct genl_info *info) if (addr.flags & MPTCP_PM_ADDR_FLAG_BACKUP) bkup = 1; + + if (token) + return mptcp_userspace_pm_set_flags(sock_net(skb->sk), + token, &addr, bkup); + if (addr.addr.family == AF_UNSPEC) { lookup_by_id = 1; if (!addr.addr.id) diff --git a/net/mptcp/pm_userspace.c b/net/mptcp/pm_userspace.c index 3d1d365e9c6f..b9df969cd38a 100644 --- a/net/mptcp/pm_userspace.c +++ b/net/mptcp/pm_userspace.c @@ -429,3 +429,33 @@ int mptcp_nl_cmd_sf_destroy(struct sk_buff *skb, struct genl_info *info) sock_put((struct sock *)msk); return err; } + +int mptcp_userspace_pm_set_flags(struct net *net, struct nlattr *token, + struct mptcp_pm_addr_entry *entry, u8 bkup) +{ + struct mptcp_sock *msk; + int ret = -EINVAL; + u32 token_val; + + token_val = nla_get_u32(token); + + msk = mptcp_token_get_sock(net, token_val); + if (!msk) + return ret; + + if (!mptcp_pm_is_userspace(msk)) + goto set_flags_err; + + if (entry->addr.family != AF_UNSPEC) + goto set_flags_err; + + lock_sock((struct sock *)msk); + spin_lock_bh(&msk->pm.lock); + ret = mptcp_pm_nl_mp_prio_send_ack(msk, &entry->addr, bkup, true); + spin_unlock_bh(&msk->pm.lock); + release_sock((struct sock *)msk); + +set_flags_err: + sock_put((struct sock *)msk); + return ret; +} diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h index bef7dea9f358..9bb49d199fa5 100644 --- a/net/mptcp/protocol.h +++ b/net/mptcp/protocol.h @@ -783,6 +783,9 @@ void mptcp_pm_rm_addr_received(struct mptcp_sock *msk, const struct mptcp_rm_list *rm_list); void mptcp_pm_mp_prio_received(struct sock *sk, u8 bkup); void mptcp_pm_mp_fail_received(struct sock *sk, u64 fail_seq); +int mptcp_pm_nl_mp_prio_send_ack(struct mptcp_sock *msk, + struct mptcp_addr_info *addr, + u8 bkup, bool use_id); bool mptcp_pm_alloc_anno_list(struct mptcp_sock *msk, const struct mptcp_pm_addr_entry *entry); void mptcp_pm_free_anno_list(struct mptcp_sock *msk); @@ -799,7 +802,8 @@ int mptcp_pm_get_flags_and_ifindex_by_id(struct mptcp_sock *msk, int mptcp_userspace_pm_get_flags_and_ifindex_by_id(struct mptcp_sock *msk, unsigned int id, u8 *flags, int *ifindex); - +int mptcp_userspace_pm_set_flags(struct net *net, struct nlattr *token, + struct mptcp_pm_addr_entry *entry, u8 bkup); int mptcp_pm_announce_addr(struct mptcp_sock *msk, const struct mptcp_addr_info *addr, bool echo);