From: Atul Gupta Subject: [Crypto v4 03/12] support for inline tls Date: Mon, 12 Feb 2018 17:34:28 +0530 Message-ID: <1518437068-14338-1-git-send-email-atul.gupta@chelsio.com> Cc: sd@queasysnail.net, linux-crypto@vger.kernel.org, davem@davemloft.net, netdev@vger.kernel.org, ganeshgr@chelsio.com To: davejwatson@fb.com, herbert@gondor.apana.org.au Return-path: Received: from stargate.chelsio.com ([12.32.117.8]:56933 "EHLO stargate.chelsio.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753979AbeBLMEp (ORCPT ); Mon, 12 Feb 2018 07:04:45 -0500 Sender: linux-crypto-owner@vger.kernel.org List-ID: Signed-off-by: Atul Gupta --- net/tls/tls_main.c | 113 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 113 insertions(+) diff --git a/net/tls/tls_main.c b/net/tls/tls_main.c index e07ee3a..10a6d5d 100644 --- a/net/tls/tls_main.c +++ b/net/tls/tls_main.c @@ -38,6 +38,7 @@ #include #include #include +#include #include @@ -48,9 +49,12 @@ enum { TLS_BASE_TX, TLS_SW_TX, + TLS_FULL_HW, /* TLS record processed Inline */ TLS_NUM_CONFIG, }; +static LIST_HEAD(device_list); +static DEFINE_MUTEX(device_mutex); static struct proto tls_prots[TLS_NUM_CONFIG]; static inline void update_sk_prot(struct sock *sk, struct tls_context *ctx) @@ -448,6 +452,92 @@ static int tls_setsockopt(struct sock *sk, int level, int optname, return do_tls_setsockopt(sk, optname, optval, optlen); } +static struct net_device *find_netdev(struct sock *sk) +{ + struct net_device *netdev = NULL; + + netdev = __ip_dev_find(&init_net, inet_sk(sk)->inet_rcv_saddr, false); + return netdev; +} + +static int get_tls_prot(struct sock *sk) +{ + struct tls_context *ctx = tls_get_ctx(sk); + struct net_device *netdev; + struct tls_device *dev; + + /* Device bound to specific IP */ + if (inet_sk(sk)->inet_rcv_saddr) { + netdev = find_netdev(sk); + if (!netdev) + goto out; + + /* Device supports Inline record processing */ + if (!(netdev->features & NETIF_F_HW_TLS_INLINE)) + goto out; + + mutex_lock(&device_mutex); + list_for_each_entry(dev, &device_list, dev_list) { + if (dev->netdev && dev->netdev(dev, netdev)) + break; + } + mutex_unlock(&device_mutex); + + ctx->tx_conf = TLS_FULL_HW; + if (dev->prot) + dev->prot(dev, sk); + } else { /* src address not known or INADDR_ANY */ + mutex_lock(&device_mutex); + list_for_each_entry(dev, &device_list, dev_list) { + if (dev->feature && dev->feature(dev)) { + ctx->tx_conf = TLS_FULL_HW; + break; + } + } + mutex_unlock(&device_mutex); + update_sk_prot(sk, ctx); + } +out: + return ctx->tx_conf; +} + +static int tls_hw_prot(struct sock *sk) +{ + /* search registered tls device for netdev */ + return get_tls_prot(sk); +} + +static void tls_hw_unhash(struct sock *sk) +{ + struct tls_device *dev; + + mutex_lock(&device_mutex); + list_for_each_entry(dev, &device_list, dev_list) { + if (dev->unhash) + dev->unhash(dev, sk); + } + mutex_unlock(&device_mutex); + tcp_prot.unhash(sk); +} + +static int tls_hw_hash(struct sock *sk) +{ + struct tls_device *dev; + int err; + + err = tcp_prot.hash(sk); + mutex_lock(&device_mutex); + list_for_each_entry(dev, &device_list, dev_list) { + if (dev->hash) + err |= dev->hash(dev, sk); + } + mutex_unlock(&device_mutex); + + if (err) + tls_hw_unhash(sk); + return err; +} + static int tls_init(struct sock *sk) { struct inet_connection_sock *icsk = inet_csk(sk); @@ -466,6 +556,9 @@ static int tls_init(struct sock *sk) ctx->sk_proto_close = sk->sk_prot->close; ctx->tx_conf = TLS_BASE_TX; + if (tls_hw_prot(sk) == TLS_FULL_HW) + goto out; + update_sk_prot(sk, ctx); out: return rc; @@ -487,7 +580,27 @@ static void build_protos(struct proto *prot, struct proto *base) prot[TLS_SW_TX] = prot[TLS_BASE_TX]; prot[TLS_SW_TX].sendmsg = tls_sw_sendmsg; prot[TLS_SW_TX].sendpage = tls_sw_sendpage; + + prot[TLS_FULL_HW] = prot[TLS_BASE_TX]; + prot[TLS_FULL_HW].hash = tls_hw_hash; + prot[TLS_FULL_HW].unhash = tls_hw_unhash; +} + +void tls_register_device(struct tls_device *device) +{ + mutex_lock(&device_mutex); + list_add_tail(&device->dev_list, &device_list); + mutex_unlock(&device_mutex); +} +EXPORT_SYMBOL(tls_register_device); + +void tls_unregister_device(struct tls_device *device) +{ + mutex_lock(&device_mutex); + list_del(&device->dev_list); + mutex_unlock(&device_mutex); } +EXPORT_SYMBOL(tls_unregister_device); static int __init tls_register(void) { -- 1.8.3.1