From patchwork Tue Nov 5 09:40:58 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geliang Tang X-Patchwork-Id: 13862720 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 026E21CEAA0 for ; Tue, 5 Nov 2024 09:41:08 +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=1730799669; cv=none; b=lhNcChvbZKjobPzy/lN/yosY8uPgTd1RpQAqXtb+A4IvoJzsGchzvtVw25zwjARma38ePv7LI6yIs5NmPnlf/Wtb+C/+PrRlWuy3HokpyvCaJb3zD4CumQn8gkIqX7cZgzuHCOmlvryUrkODuOX21zSAt3mh4Gcih2+VloXSStE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730799669; c=relaxed/simple; bh=p/FeQrTsBy9DjbSUQ6s1Th6P0uqVNuaVD+pj4E6Jnv8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=fzTFDApuAACb6eI3tJYwA/GUCDrKa8BsrbSaWTPFAxYUDQdBFaIlZ7cjauF1k2mgO8ohhKn3dh3M2w68GDI7POU8UthwjuEZdmB4i/KuIRVt/hqQhqxXpQRZBbuwM+gBgL5YY61ieAUWs+rDO8N5b8bIZG2b7yF/NWdbHYIHhU8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=X05MCt5Z; 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="X05MCt5Z" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6CE57C4CED0; Tue, 5 Nov 2024 09:41:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1730799668; bh=p/FeQrTsBy9DjbSUQ6s1Th6P0uqVNuaVD+pj4E6Jnv8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=X05MCt5ZHi5XXbwlmm4AQLLGeU/Dvu6bhw/Z79ZPvy06HPke/dXQk6f+AcniZCMed Jp9C3I7fL3MDF818x4IpMMG3FlIlzBvJMEtG1q13doQKeef0hZvcax8k/vd6oXKQpQ ETPqvSxz26s5aPGl7JY0D2SNh4W+vdCDLoP4pNMy5Hj0e8HUU8LcTMzwztu4WAj84H p2+fZGikYiOFngbm+fTUgDqZsrHE9xahMl/U0FuAJUpuKGddfSfMq/JmberFmFVRuS igUSqoUdAzh7tL3h6TQ8mLpf4Wg2IlkwEid1G0IxHg94CsCfOfSgbxl+eQYKaXDH0R +xKwFWbVafVpQ== From: Geliang Tang To: mptcp@lists.linux.dev Cc: Geliang Tang Subject: [PATCH mptcp-net 1/3] mptcp: add lookup_addr for userspace pm Date: Tue, 5 Nov 2024 17:40:58 +0800 Message-ID: <9ef5e8b9d589488850f31cb6dbd1da0f39e21210.1730799589.git.tanggeliang@kylinos.cn> X-Mailer: git-send-email 2.45.2 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 Like __lookup_addr() helper in pm_netlink.c, a new helper mptcp_userspace_pm_lookup_addr() is also defined in pm_userspace.c. It looks up the corresponding mptcp_pm_addr_entry address in userspace_pm_local_addr_list through the passed "addr" parameter and returns it. This helper can be used in mptcp_userspace_pm_delete_local_addr(), mptcp_userspace_pm_get_local_id() and mptcp_userspace_pm_is_backup() to simplify the code. Please note that with this change now list_for_each_entry() is used in mptcp_userspace_pm_append_new_local_addr(), not list_for_each_entry_safe(), but that's OK to do so because mptcp_userspace_pm_lookup_addr() only returns an entry from the list, the list hasn't been modified here. Signed-off-by: Geliang Tang --- net/mptcp/pm_userspace.c | 58 +++++++++++++++++++++------------------- 1 file changed, 30 insertions(+), 28 deletions(-) diff --git a/net/mptcp/pm_userspace.c b/net/mptcp/pm_userspace.c index 56dfea9862b7..9c622b0e3e6e 100644 --- a/net/mptcp/pm_userspace.c +++ b/net/mptcp/pm_userspace.c @@ -26,6 +26,19 @@ void mptcp_free_local_addr_list(struct mptcp_sock *msk) } } +static struct mptcp_pm_addr_entry * +mptcp_userspace_pm_lookup_addr(struct mptcp_sock *msk, + const struct mptcp_addr_info *addr) +{ + struct mptcp_pm_addr_entry *entry; + + list_for_each_entry(entry, &msk->pm.userspace_pm_local_addr_list, list) { + if (mptcp_addresses_equal(&entry->addr, addr, false)) + return entry; + } + return NULL; +} + static int mptcp_userspace_pm_append_new_local_addr(struct mptcp_sock *msk, struct mptcp_pm_addr_entry *entry, bool needs_id) @@ -90,22 +103,20 @@ static int mptcp_userspace_pm_append_new_local_addr(struct mptcp_sock *msk, static int mptcp_userspace_pm_delete_local_addr(struct mptcp_sock *msk, struct mptcp_pm_addr_entry *addr) { - struct mptcp_pm_addr_entry *entry, *tmp; struct sock *sk = (struct sock *)msk; + struct mptcp_pm_addr_entry *entry; - list_for_each_entry_safe(entry, tmp, &msk->pm.userspace_pm_local_addr_list, list) { - if (mptcp_addresses_equal(&entry->addr, &addr->addr, false)) { - /* TODO: a refcount is needed because the entry can - * be used multiple times (e.g. fullmesh mode). - */ - list_del_rcu(&entry->list); - sock_kfree_s(sk, entry, sizeof(*entry)); - msk->pm.local_addr_used--; - return 0; - } - } - - return -EINVAL; + entry = mptcp_userspace_pm_lookup_addr(msk, &addr->addr); + if (!entry) + return -EINVAL; + + /* TODO: a refcount is needed because the entry can + * be used multiple times (e.g. fullmesh mode). + */ + list_del_rcu(&entry->list); + sock_kfree_s(sk, entry, sizeof(*entry)); + msk->pm.local_addr_used--; + return 0; } static struct mptcp_pm_addr_entry * @@ -123,17 +134,12 @@ mptcp_userspace_pm_lookup_addr_by_id(struct mptcp_sock *msk, unsigned int id) int mptcp_userspace_pm_get_local_id(struct mptcp_sock *msk, struct mptcp_addr_info *skc) { - struct mptcp_pm_addr_entry *entry = NULL, *e, new_entry; + struct mptcp_pm_addr_entry *entry = NULL, new_entry; __be16 msk_sport = ((struct inet_sock *) inet_sk((struct sock *)msk))->inet_sport; spin_lock_bh(&msk->pm.lock); - list_for_each_entry(e, &msk->pm.userspace_pm_local_addr_list, list) { - if (mptcp_addresses_equal(&e->addr, skc, false)) { - entry = e; - break; - } - } + entry = mptcp_userspace_pm_lookup_addr(msk, skc); spin_unlock_bh(&msk->pm.lock); if (entry) return entry->addr.id; @@ -153,15 +159,11 @@ bool mptcp_userspace_pm_is_backup(struct mptcp_sock *msk, struct mptcp_addr_info *skc) { struct mptcp_pm_addr_entry *entry; - bool backup = false; + bool backup; spin_lock_bh(&msk->pm.lock); - list_for_each_entry(entry, &msk->pm.userspace_pm_local_addr_list, list) { - if (mptcp_addresses_equal(&entry->addr, skc, false)) { - backup = !!(entry->flags & MPTCP_PM_ADDR_FLAG_BACKUP); - break; - } - } + entry = mptcp_userspace_pm_lookup_addr(msk, skc); + backup = entry && !!(entry->flags & MPTCP_PM_ADDR_FLAG_BACKUP); spin_unlock_bh(&msk->pm.lock); return backup;