From patchwork Tue Oct 8 09:58:07 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geliang Tang X-Patchwork-Id: 13826152 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 67AD618BC03 for ; Tue, 8 Oct 2024 09:58:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728381511; cv=none; b=ZzmMSA/k5VWbfKp2TQtKyzkUSalBlptzTsJmRBOZ1I3c6edtwR8bLIZLnAqmLiLU3HVfo1nIYy0SQC0UmJXtzwAh763uyGWZYkz5g9cjiGus8sZzAWRoDD2/j3oWXyqrTaqvRnE7U2rl249497FEtqe+wWUhH0RgYT/Ht79Yycs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728381511; c=relaxed/simple; bh=PEzu/kqofVUIy99dAntCz+2sCUICoK+/v6lcaAG7pi4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Ul2vbwz9mIp3kiG2abQ5S8jpyiyHwZz5QaLtp0X4PZ3hrPM8hZi0UYXODKk5bvu/vIVHourbvQAC1jDLdw4HfjrMcTn7sFGoajikJfIs4akvmBJB/EMD+m8mN3Xp6TFnRO8HAPCGK2MPgI6ZVBAbAHQ6bqdPRSx9QP2jkTt+OkY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=LQsVADld; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="LQsVADld" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B610CC4CEC7; Tue, 8 Oct 2024 09:58:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1728381510; bh=PEzu/kqofVUIy99dAntCz+2sCUICoK+/v6lcaAG7pi4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LQsVADldtN5ulYeqOAzixAb0JqvyZBSIiDXdHSY3HQlH5ZR9QhZqk78j+CufNXzrI wZyVSf/MBQIcwlzA2h/ttpCjhoZj51vGB5lUeKjUMiY1GHvvp9MMcSCf0ytLhmJK+S /k+tejep3MMgKUGeqIsbH2Vveyfr6d6xHST80pEJZ0vFQvtNXU2i8JoCE5Dk8pja6K d1oZNPItGRbAwK+dC2BHvVaw3b5XkOyg2vQ/S+L0MCeVI2YWMEYwQzOczVoVKZeHG0 kcGzXOwzNC6aCGPp2j/2ir8nst45ndlflmdWR7ImJ6/QdfcnPRzrIRkdXCdP/HZBbT 6QlCnbGZEe+6Q== From: Geliang Tang To: mptcp@lists.linux.dev Cc: Geliang Tang Subject: [PATCH mptcp-next v2 03/13] mptcp: reuse sending nlmsg code in get_addr Date: Tue, 8 Oct 2024 17:58:07 +0800 Message-ID: X-Mailer: git-send-email 2.43.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: mptcp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Geliang Tang With the previous commit, we can reuse the send_nlmsg() code in get_addr() interfaces between the netlink PM and userspace PM. They only need to implement their own get_addr() interfaces to hold the different locks, get the entry from the different lists, then release the locks. Signed-off-by: Geliang Tang --- net/mptcp/pm_netlink.c | 58 ++++++++++++++++++++-------------------- net/mptcp/pm_userspace.c | 33 ----------------------- 2 files changed, 29 insertions(+), 62 deletions(-) diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c index 886fb7c1468d..8bc38a4cd278 100644 --- a/net/mptcp/pm_netlink.c +++ b/net/mptcp/pm_netlink.c @@ -1796,21 +1796,7 @@ static int mptcp_pm_nl_get_addr(u8 id, struct mptcp_pm_addr_entry *addr, { struct pm_nl_pernet *pernet = genl_info_pm_nl(info); struct mptcp_pm_addr_entry *entry; - struct sk_buff *msg; int ret = -EINVAL; - void *reply; - - msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); - if (!msg) - return -ENOMEM; - - reply = genlmsg_put_reply(msg, info, &mptcp_genl_family, 0, - info->genlhdr->cmd); - if (!reply) { - GENL_SET_ERR_MSG(info, "not enough space in Netlink message"); - ret = -EMSGSIZE; - goto fail; - } spin_lock_bh(&pernet->lock); entry = __lookup_addr_by_id(pernet, id); @@ -1820,21 +1806,6 @@ static int mptcp_pm_nl_get_addr(u8 id, struct mptcp_pm_addr_entry *addr, } spin_unlock_bh(&pernet->lock); - if (ret) { - GENL_SET_ERR_MSG(info, "address not found"); - goto fail; - } - - ret = mptcp_nl_fill_addr(msg, addr); - if (ret) - goto fail; - - genlmsg_end(msg, reply); - ret = genlmsg_reply(msg, info); - return ret; - -fail: - nlmsg_free(msg); return ret; } @@ -1850,13 +1821,42 @@ int mptcp_pm_nl_get_addr_doit(struct sk_buff *skb, struct genl_info *info) { struct nlattr *attr = info->attrs[MPTCP_PM_ENDPOINT_ADDR]; struct mptcp_pm_addr_entry addr; + struct sk_buff *msg; + void *reply; int ret; ret = mptcp_pm_parse_entry(attr, info, false, &addr); if (ret < 0) return ret; + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + reply = genlmsg_put_reply(msg, info, &mptcp_genl_family, 0, + info->genlhdr->cmd); + if (!reply) { + GENL_SET_ERR_MSG(info, "not enough space in Netlink message"); + ret = -EMSGSIZE; + goto fail; + } + ret = mptcp_pm_get_addr(addr.addr.id, &addr, info); + if (ret) { + GENL_SET_ERR_MSG(info, "address not found"); + goto fail; + } + + ret = mptcp_nl_fill_addr(msg, &addr); + if (ret) + goto fail; + + genlmsg_end(msg, reply); + ret = genlmsg_reply(msg, info); + return ret; + +fail: + nlmsg_free(msg); return ret; } diff --git a/net/mptcp/pm_userspace.c b/net/mptcp/pm_userspace.c index 5c9f740bd9ac..4c4693c5aae9 100644 --- a/net/mptcp/pm_userspace.c +++ b/net/mptcp/pm_userspace.c @@ -634,10 +634,8 @@ int mptcp_userspace_pm_get_addr(u8 id, struct mptcp_pm_addr_entry *addr, { struct mptcp_pm_addr_entry *entry; struct mptcp_sock *msk; - struct sk_buff *msg; int ret = -EINVAL; struct sock *sk; - void *reply; msk = mptcp_userspace_pm_get_sock(info); if (!msk) @@ -645,20 +643,6 @@ int mptcp_userspace_pm_get_addr(u8 id, struct mptcp_pm_addr_entry *addr, sk = (struct sock *)msk; - msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); - if (!msg) { - ret = -ENOMEM; - goto out; - } - - reply = genlmsg_put_reply(msg, info, &mptcp_genl_family, 0, - info->genlhdr->cmd); - if (!reply) { - GENL_SET_ERR_MSG(info, "not enough space in Netlink message"); - ret = -EMSGSIZE; - goto fail; - } - lock_sock(sk); spin_lock_bh(&msk->pm.lock); entry = mptcp_userspace_pm_lookup_addr_by_id(msk, id); @@ -669,23 +653,6 @@ int mptcp_userspace_pm_get_addr(u8 id, struct mptcp_pm_addr_entry *addr, spin_unlock_bh(&msk->pm.lock); release_sock(sk); - if (ret) { - GENL_SET_ERR_MSG(info, "address not found"); - goto fail; - } - - ret = mptcp_nl_fill_addr(msg, addr); - if (ret) - goto fail; - - genlmsg_end(msg, reply); - ret = genlmsg_reply(msg, info); - sock_put(sk); - return ret; - -fail: - nlmsg_free(msg); -out: sock_put(sk); return ret; }