From patchwork Tue Oct 8 09:58:17 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geliang Tang X-Patchwork-Id: 13826162 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 EEB4518C922 for ; Tue, 8 Oct 2024 09:58:48 +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=1728381529; cv=none; b=JoaXOeoF/qg2dJF6vUZLmAZVQPOmoiwx5YzxiD3u3qserNLGTM30WgaHvgX6H8aJUr9k5hdryW+SPTgA0zIKmq81H00c5LCiNEFbAIYFoOgChjEOczQmq+UHzX/hXuNy8yMzaDV14R4JtW5zibr1V/IfZXorKQ0DvAOQFBDOUNk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728381529; c=relaxed/simple; bh=zRrDYSrsKOnxGUDLUv6SHHsyzHqehx5WeHxuztEZX9k=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=BDlv8FKULU97wiOSYWyEYbe6DBC0RH02YUCRfGSMZS+Ji2RK5Wvq9zd7l5//ZbSiLJh5WNkREVhHhhoJFlL7an0tKAtiAxP4AL8khi3QM3o6c/4tUuPFg0R+apcGOs5aPR3JVppc6ur9leUyEeZX5wPHZCd6R4ju/sxN8/ZmLRo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Q94nAM2H; 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="Q94nAM2H" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A5753C4CECC; Tue, 8 Oct 2024 09:58:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1728381528; bh=zRrDYSrsKOnxGUDLUv6SHHsyzHqehx5WeHxuztEZX9k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Q94nAM2H403vjQ/k6wj/Js4Df3zroTUzU5kgg9ScB7pis/7v6vPA+yjWX7Fm4qh32 gxSxFb8Liov1y1jQX0ikWtEaetwvzbQXV8GVae+cX/5boUbfDeTxrWQSb7lpT0h0cZ HnevGf0eA0y/mKjHj33eZtGgb0nGa8nPIe+o/Y26dZuQa/xpXakKEPlpHNXIFvF6N0 Yh6oBxi/sd2KKAtKKkfYu/6iGLj21dtK6lMrAx2FAHTyOgl5bBpjl/yFUfGGOShVGb 1vqephuXyw0IJj+jLhVu9xc+syJNOTVBZkePKWsmE7pZMvHh6pMK6amD+4jt0SHZb4 LtpgHMKLR3SZA== From: Geliang Tang To: mptcp@lists.linux.dev Cc: Geliang Tang Subject: [PATCH mptcp-next v2 13/13] mptcp: drop free_list for deleting entries Date: Tue, 8 Oct 2024 17:58:17 +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 help of mptcp_pm_remove_addr_entry(), it's no longer necessary to move the entry to be deleted to free_list and then traverse the list to delete the entry, which is not allowed in BPF. The entry can be directly deleted through list_del_rcu() and sock_kfree_s() now. Signed-off-by: Geliang Tang --- net/mptcp/pm_userspace.c | 14 +++++--------- 1 file changed, 5 insertions(+), 9 deletions(-) diff --git a/net/mptcp/pm_userspace.c b/net/mptcp/pm_userspace.c index 9477c36d3284..4b2c3d0f685e 100644 --- a/net/mptcp/pm_userspace.c +++ b/net/mptcp/pm_userspace.c @@ -283,9 +283,7 @@ int mptcp_pm_nl_remove_doit(struct sk_buff *skb, struct genl_info *info) { struct nlattr *id = info->attrs[MPTCP_PM_ATTR_LOC_ID]; struct mptcp_pm_addr_entry *match; - struct mptcp_pm_addr_entry *entry; struct mptcp_sock *msk; - LIST_HEAD(free_list); int err = -EINVAL; struct sock *sk; u8 id_val; @@ -312,23 +310,21 @@ int mptcp_pm_nl_remove_doit(struct sk_buff *skb, struct genl_info *info) spin_lock_bh(&msk->pm.lock); match = mptcp_userspace_pm_lookup_addr_by_id(msk, id_val); + spin_unlock_bh(&msk->pm.lock); if (!match) { GENL_SET_ERR_MSG(info, "address with specified id not found"); - spin_unlock_bh(&msk->pm.lock); release_sock(sk); goto out; } - list_move(&match->list, &free_list); - spin_unlock_bh(&msk->pm.lock); - mptcp_pm_remove_addr_entry(msk, match); release_sock(sk); - list_for_each_entry_safe(match, entry, &free_list, list) { - sock_kfree_s(sk, match, sizeof(*match)); - } + spin_lock_bh(&msk->pm.lock); + list_del_rcu(&match->list); + sock_kfree_s(sk, match, sizeof(*match)); + spin_unlock_bh(&msk->pm.lock); err = 0; out: