From patchwork Thu Oct 10 05:47:52 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geliang Tang X-Patchwork-Id: 13829493 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 2958C1925AF for ; Thu, 10 Oct 2024 05:48:19 +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=1728539300; cv=none; b=F2uqJheFydYtFM4WHUSBYMqwpQG14Er16I+trbcwu8BaJIhp4+z6zeZ/5xyuiBRI4Y99Jt49wfzABSYesX1JJlX5YvF7txcm0JPyo//wE3g05s46zHOXRC1BnNk4YZu3cuwq0n7meDP/3mBPHUO4MIrbJ8oc+38PuVEreEHO388= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728539300; c=relaxed/simple; bh=G8+tUJAR725LeI32UIOej8rBnSQ+X+JipgfcuSo/ELo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=r8ql3vqlCWz+0cxGVU4XDKUmmGt/a3k0Sa6jP1lqt7xTb8/arNZ0g4CdSXpHrmjXyyJlGedgnxm6P8nIwUdnn9Wec5XEfCOouxFVpKDc8WDtZRZurV8uE9Xpe59MvqO7Ub6OumDppqRq890JiF7hA1Ut1Cq///gnXxztOMS+iHo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=d8kNfzJC; 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="d8kNfzJC" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A74DFC4CEC5; Thu, 10 Oct 2024 05:48:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1728539299; bh=G8+tUJAR725LeI32UIOej8rBnSQ+X+JipgfcuSo/ELo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=d8kNfzJCmItWO85BrW53h7Lt4p4qth7MFzgriDibQf3EM6QJK3v0MptawbIklMiuu DG3A8zkEyRoFgmlp9r85Fmhkgx43daq7fkXFG15EOvWr9TGtwdZdtwMXBzJt7plEYN eKrQCNkViwNe//8NVkIErlbZ5ijG6eXP/PaqO9pVG0jTyIBONGpzwKM1UX2lk/kIwk gz8hEa4JWdFN6bZsU7y2WUzlK7Ad5q4V+nHDWvWqswBnMQTpbt9kFK+E6vJ2fSE756 8wn54EsdMXD4aFNRHQuMZukpWQiNGzOGa086TdV4+jVVBei6862boC7HHkucOu8KQ6 sYkThJOJ9VKaA== From: Geliang Tang To: mptcp@lists.linux.dev Cc: Geliang Tang Subject: [PATCH mptcp-next v3 07/15] mptcp: reuse sending nlmsg code in dump_addr Date: Thu, 10 Oct 2024 13:47:52 +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 dump_addr interfaces between the netlink PM and userspace PM. They only need to implement their own dump_addr() interfaces to hold the different locks, copy the different address lists to an id bitmap, then release the locks. Signed-off-by: Geliang Tang --- net/mptcp/pm_netlink.c | 56 +++++++++++++++++++++------------------- net/mptcp/pm_userspace.c | 50 +++++------------------------------ net/mptcp/protocol.h | 4 +-- 3 files changed, 38 insertions(+), 72 deletions(-) diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c index 0d6e444a9f83..0309f7dbd23b 100644 --- a/net/mptcp/pm_netlink.c +++ b/net/mptcp/pm_netlink.c @@ -1864,33 +1864,50 @@ int mptcp_pm_nl_get_addr_doit(struct sk_buff *skb, struct genl_info *info) return ret; } -static int mptcp_pm_nl_dump_addr(struct sk_buff *msg, - struct netlink_callback *cb) +static int mptcp_pm_nl_dump_addr(struct mptcp_id_bitmap *bitmap, + const struct genl_info *info) +{ + struct net *net = genl_info_net(info); + struct pm_nl_pernet *pernet; + + pernet = pm_nl_get_pernet(net); + + spin_lock_bh(&pernet->lock); + bitmap_copy(bitmap->map, pernet->id_bitmap.map, MPTCP_PM_MAX_ADDR_ID + 1); + spin_unlock_bh(&pernet->lock); + + return 0; +} + +static int mptcp_pm_dump_addr(struct mptcp_id_bitmap *bitmap, + const struct genl_info *info) +{ + if (info->attrs[MPTCP_PM_ATTR_TOKEN]) + return mptcp_userspace_pm_dump_addr(bitmap, info); + return mptcp_pm_nl_dump_addr(bitmap, info); +} + +int mptcp_pm_nl_get_addr_dumpit(struct sk_buff *msg, + struct netlink_callback *cb) { const struct genl_info *info = genl_info_dump(cb); - struct net *net = sock_net(msg->sk); struct mptcp_pm_addr_entry entry; struct mptcp_id_bitmap *bitmap; - struct pm_nl_pernet *pernet; int id = cb->args[0]; void *hdr; int i; bitmap = (struct mptcp_id_bitmap *)cb->ctx; - pernet = pm_nl_get_pernet(net); - if (!id) { - spin_lock_bh(&pernet->lock); - bitmap_copy(bitmap->map, pernet->id_bitmap.map, MPTCP_PM_MAX_ADDR_ID + 1); - spin_unlock_bh(&pernet->lock); - } + if (!id) + mptcp_pm_dump_addr(bitmap, info); for (i = id; i < MPTCP_PM_MAX_ADDR_ID + 1; i++) { if (test_bit(i, bitmap->map)) { - if (mptcp_pm_nl_get_addr(i, &entry, info)) + if (mptcp_pm_get_addr(i, &entry, info)) break; - if (entry.addr.id <= id) + if (id && entry.addr.id <= id) continue; hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).portid, @@ -1913,21 +1930,6 @@ static int mptcp_pm_nl_dump_addr(struct sk_buff *msg, return msg->len; } -static int mptcp_pm_dump_addr(struct sk_buff *msg, struct netlink_callback *cb) -{ - const struct genl_info *info = genl_info_dump(cb); - - if (info->attrs[MPTCP_PM_ATTR_TOKEN]) - return mptcp_userspace_pm_dump_addr(msg, cb); - return mptcp_pm_nl_dump_addr(msg, cb); -} - -int mptcp_pm_nl_get_addr_dumpit(struct sk_buff *msg, - struct netlink_callback *cb) -{ - return mptcp_pm_dump_addr(msg, cb); -} - static int parse_limit(struct genl_info *info, int id, unsigned int *limit) { struct nlattr *attr = info->attrs[id]; diff --git a/net/mptcp/pm_userspace.c b/net/mptcp/pm_userspace.c index ad011a4fad4e..8858877d82b0 100644 --- a/net/mptcp/pm_userspace.c +++ b/net/mptcp/pm_userspace.c @@ -597,20 +597,12 @@ static int mptcp_userspace_pm_set_bitmap(struct mptcp_sock *msk, return 0; } -int mptcp_userspace_pm_dump_addr(struct sk_buff *msg, - struct netlink_callback *cb) +int mptcp_userspace_pm_dump_addr(struct mptcp_id_bitmap *bitmap, + const struct genl_info *info) { - const struct genl_info *info = genl_info_dump(cb); - struct mptcp_pm_addr_entry entry; - struct mptcp_id_bitmap *bitmap; struct mptcp_sock *msk; - int id = cb->args[0]; int ret = -EINVAL; struct sock *sk; - void *hdr; - int i; - - bitmap = (struct mptcp_id_bitmap *)cb->ctx; msk = mptcp_userspace_pm_get_sock(info); if (!msk) @@ -618,39 +610,11 @@ int mptcp_userspace_pm_dump_addr(struct sk_buff *msg, sk = (struct sock *)msk; - if (!id) { - lock_sock(sk); - spin_lock_bh(&msk->pm.lock); - ret = mptcp_userspace_pm_set_bitmap(msk, bitmap); - spin_unlock_bh(&msk->pm.lock); - release_sock(sk); - } - - for (i = id; i < MPTCP_PM_MAX_ADDR_ID + 1; i++) { - if (test_bit(i, bitmap->map)) { - if (mptcp_userspace_pm_get_addr(i, &entry, info)) - break; - - if (id && entry.addr.id <= id) - continue; - - hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).portid, - cb->nlh->nlmsg_seq, &mptcp_genl_family, - NLM_F_MULTI, MPTCP_PM_CMD_GET_ADDR); - if (!hdr) - break; - - if (mptcp_nl_fill_addr(msg, &entry) < 0) { - genlmsg_cancel(msg, hdr); - break; - } - - id = entry.addr.id; - genlmsg_end(msg, hdr); - } - } - cb->args[0] = id; - ret = msg->len; + lock_sock(sk); + spin_lock_bh(&msk->pm.lock); + ret = mptcp_userspace_pm_set_bitmap(msk, bitmap); + spin_unlock_bh(&msk->pm.lock); + release_sock(sk); sock_put(sk); return ret; diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h index 3b3a09f5d7fc..d8870ba24d02 100644 --- a/net/mptcp/protocol.h +++ b/net/mptcp/protocol.h @@ -1123,8 +1123,8 @@ int mptcp_userspace_pm_get_local_id(struct mptcp_sock *msk, struct mptcp_addr_in bool mptcp_pm_is_backup(struct mptcp_sock *msk, struct sock_common *skc); bool mptcp_pm_nl_is_backup(struct mptcp_sock *msk, struct mptcp_addr_info *skc); bool mptcp_userspace_pm_is_backup(struct mptcp_sock *msk, struct mptcp_addr_info *skc); -int mptcp_userspace_pm_dump_addr(struct sk_buff *msg, - struct netlink_callback *cb); +int mptcp_userspace_pm_dump_addr(struct mptcp_id_bitmap *bitmap, + const struct genl_info *info); int mptcp_userspace_pm_get_addr(u8 id, struct mptcp_pm_addr_entry *addr, const struct genl_info *info);