From nobody Fri Oct 18 08:42:35 2024 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 2A9AE171640 for ; Mon, 22 Jul 2024 19:36:19 +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=1721676979; cv=none; b=L2TK05FF69seShjyN+ReiBBThwdhKL58V3V1Sc5d5sTMGfDbdle1wWVOb2MI9js4QHdWxYzr19dvur+grxCBBnF43BVme2ZCcEDH6/XXJy6P6uEf+iXDYWOOZNAWh880hYCV5rpjp9AVfpdebJQk9RyPIeUD6yNIjbI5HO9LGQU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721676979; c=relaxed/simple; bh=D8/2W8TEqTlnYbeJtESGqmOUdofeKNTwfGYnPnZXBdY=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=EYidNbg3VRuwtJNtPBxzSWov/wUoxWCy/0plcccGM8FectcpW4ZKBS88jJkti1YYEdWQ5KAonvUYRhLQ6F99xX86aJ3NW95XO0ehf+RDjYHcxblyQ/qEWijkbPtIE/BKrvjal6eXUlIPjx6F9B1DY7uxitDH+XOsos0xUcgWD0A= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=s/AxSRaF; 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="s/AxSRaF" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4AC7AC116B1; Mon, 22 Jul 2024 19:36:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1721676979; bh=D8/2W8TEqTlnYbeJtESGqmOUdofeKNTwfGYnPnZXBdY=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=s/AxSRaFdullc+MSy30grmPIREofNN+XDxS0MLV298ZBvksEJ5QebIEh6sC6c0M9+ rNl1yJ09etE8Nfadc2Eq1KAXBHIQVG+P08J4UxLX3s7CZakj69dTV3XexfgDHUD9iz brQwcJZDiXKkad6AwUDvw8U783KPMrcKTd9fePPBWp1F5E1TIFyEsyKIdG4JglkzZy SsAUc/Gyb8vDIjip5lKRrID8U2xAUMu/6HgkEOYo9zYXB4D1uALnxnxdjQBDe1yJhX iokQ9/5TFVjhakINxWbhFxGcJAVhbCLetY/e8l+XmPiw7zyI/areYIkV1RNLQqVqkS 6AOhR6uCV1N2A== From: "Matthieu Baerts (NGI0)" Date: Mon, 22 Jul 2024 21:36:01 +0200 Subject: [PATCH mptcp-net v4 23/23] mptcp: pm: reduce entries iterations on connect Precedence: bulk X-Mailing-List: mptcp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20240722-mptcp-pm-avail-v4-23-15bfd73de384@kernel.org> References: <20240722-mptcp-pm-avail-v4-0-15bfd73de384@kernel.org> In-Reply-To: <20240722-mptcp-pm-avail-v4-0-15bfd73de384@kernel.org> To: mptcp@lists.linux.dev Cc: Paolo Abeni , "Matthieu Baerts (NGI0)" X-Mailer: b4 0.14.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=11395; i=matttbe@kernel.org; h=from:subject:message-id; bh=D8/2W8TEqTlnYbeJtESGqmOUdofeKNTwfGYnPnZXBdY=; b=owEBbQKS/ZANAwAIAfa3gk9CaaBzAcsmYgBmnrSXpXQxWM2lGju0DdDSZWNh38m80MRUa6fev +fVkLgKg/WJAjMEAAEIAB0WIQToy4X3aHcFem4n93r2t4JPQmmgcwUCZp60lwAKCRD2t4JPQmmg c1hHEACgA7xDP3PyM4Kio4LTEzUE00OAS4UE7ljsDykyqWmE79iP6VgsAsH3xeXNgX4Gfj/fc4f ygqaGnkwrbzpaN4Ug/Ee0v0brCzmTWzt41h0UoFvzBl6KlHGZ2DWPUARVriCokvbjBsWGruC4Iz UdhcRCNNgVpqnvXDB0Pg5mcxuj3OI0CKQ4eRJHKE4S7V+LrXjCRKICZDHAvID4Mt/aPffKi+M/e hrjWGaFIN4XRKJzPWw9T+7lPhCl33tZgUPnubv+4nNsikonRc1ER2EG6eZRIbvuOndyowpEpZo5 n5fgaHuX+0pRtTtEvoqiY7pNZxv5RCTokVwnzMS+o5Ecx6bwy5DJZhvuHg0+vyI38iPoT3V/HrE j5TTSXu7yTwCRqpY5pfXQf4HBdr5KgeL81xp+gHTC/yZk4r1NiIWTCgXXGPZBQYzK0B/HaFN8NO XqLfz2PHXbfsNlgGHBcx+phx8qNQ+fsCcnhvucCiELb0QXRpxwFqhuOtTvl7qQJTp+i7Vy3F4ci n2niT9RiCgVBlfzoEGOLGnxePQD86T/NhS6QN319mXnmGTLOZ5M2GSJvS7u5RMsnjLSOti1tM8y +VUi9rvHd7R4wVFy9DSQ8ySFpPgxGOpwaDBynxyvektNo13zigg+l5zbK/iQWZJh29NRMbFzEQD C9t8r5EN+swx79A== X-Developer-Key: i=matttbe@kernel.org; a=openpgp; fpr=E8CB85F76877057A6E27F77AF6B7824F4269A073 __mptcp_subflow_connect() is currently called from the path-managers, which have all the required information to create subflows. No need to call the PM again to re-iterate over the list of entries with RCU lock to get more info. Instead, it is possible to pass a mptcp_pm_addr_entry structure, instead of a mptcp_addr_info one. The former contains the ifindex and the flags that are required when creating the new subflow. This is a partial revert of commit ee285257a9c1 ("mptcp: drop flags and ifindex arguments"). While at it, the local ID can also be set if it is known and 0, to avoid having to set it in the 'rebuild_header' hook, which will cause a new iteration of the endpoint entries. Signed-off-by: Matthieu Baerts (NGI0) --- Notes: - This patch is for net-next - v4: - Avoid multiple copies of an addr entry in fill_local_addresses_vec(). - Rebased on top of "mptcp: fix endpoints with 'signal' and 'subflow' flags", v4. --- net/mptcp/pm.c | 11 ----------- net/mptcp/pm_netlink.c | 48 ++++++++++++--------------------------------= ---- net/mptcp/pm_userspace.c | 19 +------------------ net/mptcp/protocol.h | 10 +--------- net/mptcp/subflow.c | 29 ++++++++++++++++++----------- 5 files changed, 32 insertions(+), 85 deletions(-) diff --git a/net/mptcp/pm.c b/net/mptcp/pm.c index ddad51210971..54fabd386b04 100644 --- a/net/mptcp/pm.c +++ b/net/mptcp/pm.c @@ -416,17 +416,6 @@ int mptcp_pm_get_local_id(struct mptcp_sock *msk, stru= ct sock_common *skc) return mptcp_pm_nl_get_local_id(msk, &skc_local); } =20 -int mptcp_pm_get_flags_and_ifindex_by_id(struct mptcp_sock *msk, unsigned = int id, - u8 *flags, int *ifindex) -{ - *flags =3D 0; - *ifindex =3D 0; - - if (mptcp_pm_is_userspace(msk)) - return mptcp_userspace_pm_get_flags_and_ifindex_by_id(msk, id, flags, if= index); - return mptcp_pm_nl_get_flags_and_ifindex_by_id(msk, id, flags, ifindex); -} - int mptcp_pm_get_addr(struct sk_buff *skb, struct genl_info *info) { if (info->attrs[MPTCP_PM_ATTR_TOKEN]) diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c index 45a1aa0a40bf..a316951f8762 100644 --- a/net/mptcp/pm_netlink.c +++ b/net/mptcp/pm_netlink.c @@ -625,7 +625,7 @@ static void mptcp_pm_create_subflow_or_signal_addr(stru= ct mptcp_sock *msk) =20 spin_unlock_bh(&msk->pm.lock); for (i =3D 0; i < nr; i++) - __mptcp_subflow_connect(sk, &local.addr, &addrs[i]); + __mptcp_subflow_connect(sk, &local, &addrs[i]); spin_lock_bh(&msk->pm.lock); } mptcp_pm_nl_check_work_pending(msk); @@ -646,7 +646,7 @@ static void mptcp_pm_nl_subflow_established(struct mptc= p_sock *msk) */ static unsigned int fill_local_addresses_vec(struct mptcp_sock *msk, struct mptcp_addr_info *remote, - struct mptcp_addr_info *addrs) + struct mptcp_pm_addr_entry *entries) { struct sock *sk =3D (struct sock *)msk; struct mptcp_pm_addr_entry *entry; @@ -670,14 +670,14 @@ static unsigned int fill_local_addresses_vec(struct m= ptcp_sock *msk, continue; =20 if (msk->pm.subflows < subflows_max) { - msk->pm.subflows++; - addrs[i] =3D entry->addr; + memcpy(&entries[i], entry, sizeof(entries[i])); =20 /* Special case for ID0: set the correct ID */ if (msk->first && mptcp_addresses_equal(&entry->addr, &mpc_addr, entry->addr.port)) - addrs[i].id =3D 0; + entries[i].addr.id =3D 0; =20 + msk->pm.subflows++; i++; } } @@ -687,21 +687,19 @@ static unsigned int fill_local_addresses_vec(struct m= ptcp_sock *msk, * 'IPADDRANY' local address */ if (!i) { - struct mptcp_addr_info local; - - memset(&local, 0, sizeof(local)); - local.family =3D + memset(&entries[i], 0, sizeof(entries[i])); + entries[i].addr.family =3D #if IS_ENABLED(CONFIG_MPTCP_IPV6) remote->family =3D=3D AF_INET6 && ipv6_addr_v4mapped(&remote->addr6) ? AF_INET : #endif remote->family; =20 - if (!mptcp_pm_addr_families_match(sk, &local, remote)) + if (!mptcp_pm_addr_families_match(sk, &entries[i].addr, remote)) return 0; =20 msk->pm.subflows++; - addrs[i++] =3D local; + i++; } =20 return i; @@ -709,7 +707,7 @@ static unsigned int fill_local_addresses_vec(struct mpt= cp_sock *msk, =20 static void mptcp_pm_nl_add_addr_received(struct mptcp_sock *msk) { - struct mptcp_addr_info addrs[MPTCP_PM_ADDR_MAX]; + struct mptcp_pm_addr_entry entries[MPTCP_PM_ADDR_MAX]; struct sock *sk =3D (struct sock *)msk; unsigned int add_addr_accept_max; struct mptcp_addr_info remote; @@ -738,13 +736,13 @@ static void mptcp_pm_nl_add_addr_received(struct mptc= p_sock *msk) /* connect to the specified remote address, using whatever * local address the routing configuration will pick. */ - nr =3D fill_local_addresses_vec(msk, &remote, addrs); + nr =3D fill_local_addresses_vec(msk, &remote, entries); if (nr =3D=3D 0) return; =20 spin_unlock_bh(&msk->pm.lock); for (i =3D 0; i < nr; i++) - if (__mptcp_subflow_connect(sk, &addrs[i], &remote) =3D=3D 0) + if (__mptcp_subflow_connect(sk, &entries[i], &remote) =3D=3D 0) sf_created =3D true; spin_lock_bh(&msk->pm.lock); =20 @@ -1395,28 +1393,6 @@ int mptcp_pm_nl_add_addr_doit(struct sk_buff *skb, s= truct genl_info *info) return ret; } =20 -int mptcp_pm_nl_get_flags_and_ifindex_by_id(struct mptcp_sock *msk, unsign= ed int id, - u8 *flags, int *ifindex) -{ - struct mptcp_pm_addr_entry *entry; - struct sock *sk =3D (struct sock *)msk; - struct net *net =3D sock_net(sk); - - /* No entries with ID 0 */ - if (id =3D=3D 0) - return 0; - - rcu_read_lock(); - entry =3D __lookup_addr_by_id(pm_nl_get_pernet(net), id); - if (entry) { - *flags =3D entry->flags; - *ifindex =3D entry->ifindex; - } - rcu_read_unlock(); - - return 0; -} - static bool remove_anno_list_by_saddr(struct mptcp_sock *msk, const struct mptcp_addr_info *addr) { diff --git a/net/mptcp/pm_userspace.c b/net/mptcp/pm_userspace.c index f0a4590506c6..97b09dffff6d 100644 --- a/net/mptcp/pm_userspace.c +++ b/net/mptcp/pm_userspace.c @@ -119,23 +119,6 @@ mptcp_userspace_pm_lookup_addr_by_id(struct mptcp_sock= *msk, unsigned int id) return NULL; } =20 -int mptcp_userspace_pm_get_flags_and_ifindex_by_id(struct mptcp_sock *msk, - unsigned int id, - u8 *flags, int *ifindex) -{ - struct mptcp_pm_addr_entry *match; - - spin_lock_bh(&msk->pm.lock); - match =3D mptcp_userspace_pm_lookup_addr_by_id(msk, id); - spin_unlock_bh(&msk->pm.lock); - if (match) { - *flags =3D match->flags; - *ifindex =3D match->ifindex; - } - - return 0; -} - int mptcp_userspace_pm_get_local_id(struct mptcp_sock *msk, struct mptcp_addr_info *skc) { @@ -394,7 +377,7 @@ int mptcp_pm_nl_subflow_create_doit(struct sk_buff *skb= , struct genl_info *info) =20 lock_sock(sk); =20 - err =3D __mptcp_subflow_connect(sk, &local.addr, &addr_r); + err =3D __mptcp_subflow_connect(sk, &local, &addr_r); =20 release_sock(sk); =20 diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h index f2eb5273d752..259e247b0862 100644 --- a/net/mptcp/protocol.h +++ b/net/mptcp/protocol.h @@ -722,7 +722,7 @@ bool mptcp_addresses_equal(const struct mptcp_addr_info= *a, void mptcp_local_address(const struct sock_common *skc, struct mptcp_addr_= info *addr); =20 /* called with sk socket lock held */ -int __mptcp_subflow_connect(struct sock *sk, const struct mptcp_addr_info = *loc, +int __mptcp_subflow_connect(struct sock *sk, const struct mptcp_pm_addr_en= try *local, const struct mptcp_addr_info *remote); int mptcp_subflow_create_socket(struct sock *sk, unsigned short family, struct socket **new_sock); @@ -1015,14 +1015,6 @@ mptcp_pm_del_add_timer(struct mptcp_sock *msk, struct mptcp_pm_add_entry * mptcp_lookup_anno_list_by_saddr(const struct mptcp_sock *msk, const struct mptcp_addr_info *addr); -int mptcp_pm_get_flags_and_ifindex_by_id(struct mptcp_sock *msk, - unsigned int id, - u8 *flags, int *ifindex); -int mptcp_pm_nl_get_flags_and_ifindex_by_id(struct mptcp_sock *msk, unsign= ed int id, - u8 *flags, int *ifindex); -int mptcp_userspace_pm_get_flags_and_ifindex_by_id(struct mptcp_sock *msk, - unsigned int id, - u8 *flags, int *ifindex); int mptcp_pm_set_flags(struct sk_buff *skb, struct genl_info *info); int mptcp_pm_nl_set_flags(struct sk_buff *skb, struct genl_info *info); int mptcp_userspace_pm_set_flags(struct sk_buff *skb, struct genl_info *in= fo); diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c index 39e2cbdf3801..0835e71118b9 100644 --- a/net/mptcp/subflow.c +++ b/net/mptcp/subflow.c @@ -1544,26 +1544,24 @@ void mptcp_info2sockaddr(const struct mptcp_addr_in= fo *info, #endif } =20 -int __mptcp_subflow_connect(struct sock *sk, const struct mptcp_addr_info = *loc, +int __mptcp_subflow_connect(struct sock *sk, const struct mptcp_pm_addr_en= try *local, const struct mptcp_addr_info *remote) { struct mptcp_sock *msk =3D mptcp_sk(sk); struct mptcp_subflow_context *subflow; + int local_id =3D local->addr.id; struct sockaddr_storage addr; int remote_id =3D remote->id; - int local_id =3D loc->id; int err =3D -ENOTCONN; struct socket *sf; struct sock *ssk; u32 remote_token; int addrlen; - int ifindex; - u8 flags; =20 if (!mptcp_is_fully_established(sk)) goto err_out; =20 - err =3D mptcp_subflow_create_socket(sk, loc->family, &sf); + err =3D mptcp_subflow_create_socket(sk, local->addr.family, &sf); if (err) goto err_out; =20 @@ -1573,23 +1571,32 @@ int __mptcp_subflow_connect(struct sock *sk, const = struct mptcp_addr_info *loc, get_random_bytes(&subflow->local_nonce, sizeof(u32)); } while (!subflow->local_nonce); =20 - if (local_id) + /* if 'IPADDRANY', the ID will be set later, after the routing */ + if (local->addr.family =3D=3D AF_INET) { + if (!local->addr.addr.s_addr) + local_id =3D -1; +#if IS_ENABLED(CONFIG_IPV6) + } else if (sk->sk_family =3D=3D AF_INET6) { + if (ipv6_addr_any(&local->addr.addr6)) + local_id =3D -1; +#endif + } + + if (local_id >=3D 0) subflow_set_local_id(subflow, local_id); =20 - mptcp_pm_get_flags_and_ifindex_by_id(msk, local_id, - &flags, &ifindex); subflow->remote_key_valid =3D 1; subflow->remote_key =3D READ_ONCE(msk->remote_key); subflow->local_key =3D READ_ONCE(msk->local_key); subflow->token =3D msk->token; - mptcp_info2sockaddr(loc, &addr, ssk->sk_family); + mptcp_info2sockaddr(&local->addr, &addr, ssk->sk_family); =20 addrlen =3D sizeof(struct sockaddr_in); #if IS_ENABLED(CONFIG_MPTCP_IPV6) if (addr.ss_family =3D=3D AF_INET6) addrlen =3D sizeof(struct sockaddr_in6); #endif - ssk->sk_bound_dev_if =3D ifindex; + ssk->sk_bound_dev_if =3D local->ifindex; err =3D kernel_bind(sf, (struct sockaddr *)&addr, addrlen); if (err) goto failed; @@ -1600,7 +1607,7 @@ int __mptcp_subflow_connect(struct sock *sk, const st= ruct mptcp_addr_info *loc, subflow->remote_token =3D remote_token; WRITE_ONCE(subflow->remote_id, remote_id); subflow->request_join =3D 1; - subflow->request_bkup =3D !!(flags & MPTCP_PM_ADDR_FLAG_BACKUP); + subflow->request_bkup =3D !!(local->flags & MPTCP_PM_ADDR_FLAG_BACKUP); subflow->subflow_id =3D msk->subflow_id++; mptcp_info2sockaddr(remote, &addr, ssk->sk_family); =20 --=20 2.45.2