From patchwork Tue Oct 8 09:58:11 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geliang Tang X-Patchwork-Id: 13826156 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 9696818BC03 for ; Tue, 8 Oct 2024 09:58:38 +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=1728381518; cv=none; b=Fi8vn5MgyfqK+wQFoLC4dgfRMQ/FGofx1wBdm2f8o2/vuccXuUBJSZFPpcB6k0wQbp+3c+nN4ag38fm7n01DDvpwGBNqz0B82rwmVCv04dXa6mtU+TkdlSP8WEy0XUB8CjQkDGXWH8pH5ZnYjJzPhYcLzNk23/5ZXpQsBbHNEMs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728381518; c=relaxed/simple; bh=yKHlvMtyNVXIKlhb728cLdgX6pfxlFojxlZbKIbyfUc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=NZ3yK6M+Svuunet2gqlxcSiPaafYeFRpCS7IUxxegE3Ozj2gvTwql7vHppovjMMUmJCxpRoZtca9VENCpcFlRnA2PdG7gvDAvi5o/yyRVd9Fw/FDN8l+qGX4DlFtyU/M5LcUsBNJTbTe8FFBW3wIcAKCLSDIIKniYtKft73/raU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=p2tsg/pJ; 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="p2tsg/pJ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 033A8C4CECC; Tue, 8 Oct 2024 09:58:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1728381518; bh=yKHlvMtyNVXIKlhb728cLdgX6pfxlFojxlZbKIbyfUc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=p2tsg/pJMjcV0t0b5xatO0d7bAmaisICofIwjDAeCUY20T4dClr+HZ1TA8R6IGUTO xdBY5YlHQZZCW5RSP2qERB+4VBUCS/w6Cf3Ta3x6N5AC6TKX958FegxnjirSbOw2RU GOp7D/RWQyPP8tbAT8f0NS+rog86LbGChikk/jkfphFBQX/Dvat4fKs6OjIGqO37Xw a8kLGOnkr8GK982rRV3ltwkxNGp4eYuXEz1IBtEOAkNomR5ItMqZ3Ne/1WZYxKzLnV D/Qkv7D9SpuY+xM/72s4XwfuIrl1P/MS+9EQDYvAgbaOWlT21L/BDa+PqBPe19+/pc JrrVjjFhoDS2Q== From: Geliang Tang To: mptcp@lists.linux.dev Cc: Geliang Tang Subject: [PATCH mptcp-next v2 07/13] mptcp: reuse sending nlmsg code in dump_addr Date: Tue, 8 Oct 2024 17:58:11 +0800 Message-ID: <096eb4419b3467b4fd6c8c2d164e9457eb00ae2b.1728381245.git.tanggeliang@kylinos.cn> 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 bcee83306e40..15ec8a193279 100644 --- a/net/mptcp/pm_netlink.c +++ b/net/mptcp/pm_netlink.c @@ -1863,33 +1863,50 @@ 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, @@ -1912,21 +1929,6 @@ 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 be2028ffebde..0a4edb7ee1ed 100644 --- a/net/mptcp/protocol.h +++ b/net/mptcp/protocol.h @@ -1125,8 +1125,8 @@ 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);