crypto: chtls - Register chtls with net tls
Register chtls as Inline TLS driver, chtls is ULD to cxgb4. Setsockopt to program (tx/rx) keys on chip. Support AES GCM of key size 128. Support both Inline Rx and Tx. Signed-off-by: Atul Gupta <atul.gupta@chelsio.com> Reviewed-by: Casey Leedom <leedom@chelsio.com> Reviewed-by: Michael Werner <werner@chelsio.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Atul Gupta
David S. Miller
parent
a6779341a1
commit
a089439478
575
drivers/crypto/chelsio/chtls/chtls_main.c
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575
drivers/crypto/chelsio/chtls/chtls_main.c
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@ -0,0 +1,575 @@
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/*
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* Copyright (c) 2018 Chelsio Communications, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Written by: Atul Gupta (atul.gupta@chelsio.com)
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/skbuff.h>
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#include <linux/socket.h>
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#include <linux/hash.h>
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#include <linux/in.h>
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#include <linux/net.h>
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#include <linux/ip.h>
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#include <linux/tcp.h>
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#include <net/tcp.h>
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#include <net/tls.h>
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#include "chtls.h"
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#include "chtls_cm.h"
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#define DRV_NAME "chtls"
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/*
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* chtls device management
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* maintains a list of the chtls devices
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*/
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static LIST_HEAD(cdev_list);
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static DEFINE_MUTEX(cdev_mutex);
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static DEFINE_MUTEX(cdev_list_lock);
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static DEFINE_MUTEX(notify_mutex);
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static RAW_NOTIFIER_HEAD(listen_notify_list);
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static struct proto chtls_cpl_prot;
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struct request_sock_ops chtls_rsk_ops;
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static uint send_page_order = (14 - PAGE_SHIFT < 0) ? 0 : 14 - PAGE_SHIFT;
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static void register_listen_notifier(struct notifier_block *nb)
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{
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mutex_lock(¬ify_mutex);
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raw_notifier_chain_register(&listen_notify_list, nb);
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mutex_unlock(¬ify_mutex);
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}
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static void unregister_listen_notifier(struct notifier_block *nb)
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{
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mutex_lock(¬ify_mutex);
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raw_notifier_chain_unregister(&listen_notify_list, nb);
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mutex_unlock(¬ify_mutex);
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}
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static int listen_notify_handler(struct notifier_block *this,
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unsigned long event, void *data)
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{
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struct chtls_dev *cdev;
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struct sock *sk;
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int ret;
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sk = data;
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ret = NOTIFY_DONE;
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switch (event) {
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case CHTLS_LISTEN_START:
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case CHTLS_LISTEN_STOP:
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mutex_lock(&cdev_list_lock);
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list_for_each_entry(cdev, &cdev_list, list) {
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if (event == CHTLS_LISTEN_START)
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ret = chtls_listen_start(cdev, sk);
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else
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chtls_listen_stop(cdev, sk);
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}
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mutex_unlock(&cdev_list_lock);
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break;
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}
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return ret;
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}
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static struct notifier_block listen_notifier = {
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.notifier_call = listen_notify_handler
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};
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static int listen_backlog_rcv(struct sock *sk, struct sk_buff *skb)
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{
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if (likely(skb_transport_header(skb) != skb_network_header(skb)))
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return tcp_v4_do_rcv(sk, skb);
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BLOG_SKB_CB(skb)->backlog_rcv(sk, skb);
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return 0;
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}
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static int chtls_start_listen(struct sock *sk)
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{
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int err;
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if (sk->sk_protocol != IPPROTO_TCP)
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return -EPROTONOSUPPORT;
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if (sk->sk_family == PF_INET &&
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LOOPBACK(inet_sk(sk)->inet_rcv_saddr))
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return -EADDRNOTAVAIL;
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sk->sk_backlog_rcv = listen_backlog_rcv;
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mutex_lock(¬ify_mutex);
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err = raw_notifier_call_chain(&listen_notify_list,
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CHTLS_LISTEN_START, sk);
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mutex_unlock(¬ify_mutex);
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return err;
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}
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static void chtls_stop_listen(struct sock *sk)
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{
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if (sk->sk_protocol != IPPROTO_TCP)
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return;
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mutex_lock(¬ify_mutex);
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raw_notifier_call_chain(&listen_notify_list,
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CHTLS_LISTEN_STOP, sk);
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mutex_unlock(¬ify_mutex);
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}
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static int chtls_inline_feature(struct tls_device *dev)
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{
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struct net_device *netdev;
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struct chtls_dev *cdev;
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int i;
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cdev = to_chtls_dev(dev);
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for (i = 0; i < cdev->lldi->nports; i++) {
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netdev = cdev->ports[i];
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if (netdev->features & NETIF_F_HW_TLS_RECORD)
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return 1;
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}
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return 0;
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}
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static int chtls_create_hash(struct tls_device *dev, struct sock *sk)
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{
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if (sk->sk_state == TCP_LISTEN)
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return chtls_start_listen(sk);
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return 0;
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}
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static void chtls_destroy_hash(struct tls_device *dev, struct sock *sk)
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{
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if (sk->sk_state == TCP_LISTEN)
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chtls_stop_listen(sk);
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}
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static void chtls_register_dev(struct chtls_dev *cdev)
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{
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struct tls_device *tlsdev = &cdev->tlsdev;
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strlcpy(tlsdev->name, "chtls", TLS_DEVICE_NAME_MAX);
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strlcat(tlsdev->name, cdev->lldi->ports[0]->name,
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TLS_DEVICE_NAME_MAX);
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tlsdev->feature = chtls_inline_feature;
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tlsdev->hash = chtls_create_hash;
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tlsdev->unhash = chtls_destroy_hash;
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tls_register_device(&cdev->tlsdev);
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}
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static void chtls_unregister_dev(struct chtls_dev *cdev)
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{
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tls_unregister_device(&cdev->tlsdev);
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}
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static void process_deferq(struct work_struct *task_param)
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{
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struct chtls_dev *cdev = container_of(task_param,
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struct chtls_dev, deferq_task);
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struct sk_buff *skb;
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spin_lock_bh(&cdev->deferq.lock);
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while ((skb = __skb_dequeue(&cdev->deferq)) != NULL) {
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spin_unlock_bh(&cdev->deferq.lock);
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DEFERRED_SKB_CB(skb)->handler(cdev, skb);
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spin_lock_bh(&cdev->deferq.lock);
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}
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spin_unlock_bh(&cdev->deferq.lock);
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}
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static int chtls_get_skb(struct chtls_dev *cdev)
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{
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cdev->askb = alloc_skb(sizeof(struct tcphdr), GFP_KERNEL);
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if (!cdev->askb)
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return -ENOMEM;
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skb_put(cdev->askb, sizeof(struct tcphdr));
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skb_reset_transport_header(cdev->askb);
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memset(cdev->askb->data, 0, cdev->askb->len);
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return 0;
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}
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static void *chtls_uld_add(const struct cxgb4_lld_info *info)
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{
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struct cxgb4_lld_info *lldi;
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struct chtls_dev *cdev;
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int i, j;
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cdev = kzalloc(sizeof(*cdev) + info->nports *
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(sizeof(struct net_device *)), GFP_KERNEL);
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if (!cdev)
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goto out;
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lldi = kzalloc(sizeof(*lldi), GFP_KERNEL);
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if (!lldi)
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goto out_lldi;
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if (chtls_get_skb(cdev))
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goto out_skb;
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*lldi = *info;
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cdev->lldi = lldi;
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cdev->pdev = lldi->pdev;
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cdev->tids = lldi->tids;
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cdev->ports = (struct net_device **)(cdev + 1);
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cdev->ports = lldi->ports;
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cdev->mtus = lldi->mtus;
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cdev->tids = lldi->tids;
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cdev->pfvf = FW_VIID_PFN_G(cxgb4_port_viid(lldi->ports[0]))
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<< FW_VIID_PFN_S;
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for (i = 0; i < (1 << RSPQ_HASH_BITS); i++) {
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unsigned int size = 64 - sizeof(struct rsp_ctrl) - 8;
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cdev->rspq_skb_cache[i] = __alloc_skb(size,
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gfp_any(), 0,
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lldi->nodeid);
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if (unlikely(!cdev->rspq_skb_cache[i]))
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goto out_rspq_skb;
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}
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idr_init(&cdev->hwtid_idr);
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INIT_WORK(&cdev->deferq_task, process_deferq);
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spin_lock_init(&cdev->listen_lock);
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spin_lock_init(&cdev->idr_lock);
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cdev->send_page_order = min_t(uint, get_order(32768),
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send_page_order);
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if (lldi->vr->key.size)
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if (chtls_init_kmap(cdev, lldi))
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goto out_rspq_skb;
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mutex_lock(&cdev_mutex);
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list_add_tail(&cdev->list, &cdev_list);
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mutex_unlock(&cdev_mutex);
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return cdev;
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out_rspq_skb:
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for (j = 0; j <= i; j++)
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kfree_skb(cdev->rspq_skb_cache[j]);
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kfree_skb(cdev->askb);
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out_skb:
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kfree(lldi);
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out_lldi:
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kfree(cdev);
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out:
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return NULL;
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}
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static void chtls_free_uld(struct chtls_dev *cdev)
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{
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int i;
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chtls_unregister_dev(cdev);
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kvfree(cdev->kmap.addr);
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idr_destroy(&cdev->hwtid_idr);
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for (i = 0; i < (1 << RSPQ_HASH_BITS); i++)
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kfree_skb(cdev->rspq_skb_cache[i]);
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kfree(cdev->lldi);
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if (cdev->askb)
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kfree_skb(cdev->askb);
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kfree(cdev);
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}
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static void chtls_free_all_uld(void)
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{
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struct chtls_dev *cdev, *tmp;
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mutex_lock(&cdev_mutex);
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list_for_each_entry_safe(cdev, tmp, &cdev_list, list)
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chtls_free_uld(cdev);
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mutex_unlock(&cdev_mutex);
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}
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static int chtls_uld_state_change(void *handle, enum cxgb4_state new_state)
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{
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struct chtls_dev *cdev = handle;
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switch (new_state) {
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case CXGB4_STATE_UP:
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chtls_register_dev(cdev);
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break;
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case CXGB4_STATE_DOWN:
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break;
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case CXGB4_STATE_START_RECOVERY:
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break;
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case CXGB4_STATE_DETACH:
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mutex_lock(&cdev_mutex);
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list_del(&cdev->list);
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mutex_unlock(&cdev_mutex);
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chtls_free_uld(cdev);
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break;
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default:
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break;
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}
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return 0;
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}
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static struct sk_buff *copy_gl_to_skb_pkt(const struct pkt_gl *gl,
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const __be64 *rsp,
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u32 pktshift)
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{
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struct sk_buff *skb;
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/* Allocate space for cpl_pass_accpet_req which will be synthesized by
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* driver. Once driver synthesizes cpl_pass_accpet_req the skb will go
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* through the regular cpl_pass_accept_req processing in TOM.
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*/
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skb = alloc_skb(gl->tot_len + sizeof(struct cpl_pass_accept_req)
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- pktshift, GFP_ATOMIC);
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if (unlikely(!skb))
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return NULL;
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__skb_put(skb, gl->tot_len + sizeof(struct cpl_pass_accept_req)
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- pktshift);
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/* For now we will copy cpl_rx_pkt in the skb */
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skb_copy_to_linear_data(skb, rsp, sizeof(struct cpl_rx_pkt));
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skb_copy_to_linear_data_offset(skb, sizeof(struct cpl_pass_accept_req)
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, gl->va + pktshift,
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gl->tot_len - pktshift);
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return skb;
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}
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static int chtls_recv_packet(struct chtls_dev *cdev,
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const struct pkt_gl *gl, const __be64 *rsp)
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{
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unsigned int opcode = *(u8 *)rsp;
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struct sk_buff *skb;
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int ret;
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skb = copy_gl_to_skb_pkt(gl, rsp, cdev->lldi->sge_pktshift);
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if (!skb)
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return -ENOMEM;
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ret = chtls_handlers[opcode](cdev, skb);
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if (ret & CPL_RET_BUF_DONE)
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kfree_skb(skb);
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return 0;
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}
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static int chtls_recv_rsp(struct chtls_dev *cdev, const __be64 *rsp)
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{
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unsigned long rspq_bin;
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unsigned int opcode;
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struct sk_buff *skb;
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unsigned int len;
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int ret;
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len = 64 - sizeof(struct rsp_ctrl) - 8;
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opcode = *(u8 *)rsp;
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rspq_bin = hash_ptr((void *)rsp, RSPQ_HASH_BITS);
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skb = cdev->rspq_skb_cache[rspq_bin];
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if (skb && !skb_is_nonlinear(skb) &&
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!skb_shared(skb) && !skb_cloned(skb)) {
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refcount_inc(&skb->users);
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if (refcount_read(&skb->users) == 2) {
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__skb_trim(skb, 0);
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if (skb_tailroom(skb) >= len)
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goto copy_out;
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}
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refcount_dec(&skb->users);
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}
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skb = alloc_skb(len, GFP_ATOMIC);
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if (unlikely(!skb))
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return -ENOMEM;
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copy_out:
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__skb_put(skb, len);
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skb_copy_to_linear_data(skb, rsp, len);
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skb_reset_network_header(skb);
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skb_reset_transport_header(skb);
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ret = chtls_handlers[opcode](cdev, skb);
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if (ret & CPL_RET_BUF_DONE)
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kfree_skb(skb);
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return 0;
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}
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static void chtls_recv(struct chtls_dev *cdev,
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struct sk_buff **skbs, const __be64 *rsp)
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{
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struct sk_buff *skb = *skbs;
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unsigned int opcode;
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int ret;
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opcode = *(u8 *)rsp;
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__skb_push(skb, sizeof(struct rss_header));
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skb_copy_to_linear_data(skb, rsp, sizeof(struct rss_header));
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ret = chtls_handlers[opcode](cdev, skb);
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if (ret & CPL_RET_BUF_DONE)
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kfree_skb(skb);
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}
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static int chtls_uld_rx_handler(void *handle, const __be64 *rsp,
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const struct pkt_gl *gl)
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{
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struct chtls_dev *cdev = handle;
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unsigned int opcode;
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struct sk_buff *skb;
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opcode = *(u8 *)rsp;
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if (unlikely(opcode == CPL_RX_PKT)) {
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if (chtls_recv_packet(cdev, gl, rsp) < 0)
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goto nomem;
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return 0;
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}
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if (!gl)
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return chtls_recv_rsp(cdev, rsp);
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#define RX_PULL_LEN 128
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skb = cxgb4_pktgl_to_skb(gl, RX_PULL_LEN, RX_PULL_LEN);
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if (unlikely(!skb))
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goto nomem;
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chtls_recv(cdev, &skb, rsp);
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return 0;
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nomem:
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return -ENOMEM;
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}
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static int do_chtls_getsockopt(struct sock *sk, char __user *optval,
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int __user *optlen)
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{
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struct tls_crypto_info crypto_info;
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crypto_info.version = TLS_1_2_VERSION;
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if (copy_to_user(optval, &crypto_info, sizeof(struct tls_crypto_info)))
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return -EFAULT;
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return 0;
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}
|
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static int chtls_getsockopt(struct sock *sk, int level, int optname,
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char __user *optval, int __user *optlen)
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{
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struct tls_context *ctx = tls_get_ctx(sk);
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if (level != SOL_TLS)
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return ctx->getsockopt(sk, level, optname, optval, optlen);
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return do_chtls_getsockopt(sk, optval, optlen);
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}
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|
||||
static int do_chtls_setsockopt(struct sock *sk, int optname,
|
||||
char __user *optval, unsigned int optlen)
|
||||
{
|
||||
struct tls_crypto_info *crypto_info, tmp_crypto_info;
|
||||
struct chtls_sock *csk;
|
||||
int keylen;
|
||||
int rc = 0;
|
||||
|
||||
csk = rcu_dereference_sk_user_data(sk);
|
||||
|
||||
if (!optval || optlen < sizeof(*crypto_info)) {
|
||||
rc = -EINVAL;
|
||||
goto out;
|
||||
}
|
||||
|
||||
rc = copy_from_user(&tmp_crypto_info, optval, sizeof(*crypto_info));
|
||||
if (rc) {
|
||||
rc = -EFAULT;
|
||||
goto out;
|
||||
}
|
||||
|
||||
/* check version */
|
||||
if (tmp_crypto_info.version != TLS_1_2_VERSION) {
|
||||
rc = -ENOTSUPP;
|
||||
goto out;
|
||||
}
|
||||
|
||||
crypto_info = (struct tls_crypto_info *)&csk->tlshws.crypto_info;
|
||||
|
||||
switch (tmp_crypto_info.cipher_type) {
|
||||
case TLS_CIPHER_AES_GCM_128: {
|
||||
rc = copy_from_user(crypto_info, optval,
|
||||
sizeof(struct
|
||||
tls12_crypto_info_aes_gcm_128));
|
||||
|
||||
if (rc) {
|
||||
rc = -EFAULT;
|
||||
goto out;
|
||||
}
|
||||
|
||||
keylen = TLS_CIPHER_AES_GCM_128_KEY_SIZE;
|
||||
rc = chtls_setkey(csk, keylen, optname);
|
||||
break;
|
||||
}
|
||||
default:
|
||||
rc = -EINVAL;
|
||||
goto out;
|
||||
}
|
||||
out:
|
||||
return rc;
|
||||
}
|
||||
|
||||
static int chtls_setsockopt(struct sock *sk, int level, int optname,
|
||||
char __user *optval, unsigned int optlen)
|
||||
{
|
||||
struct tls_context *ctx = tls_get_ctx(sk);
|
||||
|
||||
if (level != SOL_TLS)
|
||||
return ctx->setsockopt(sk, level, optname, optval, optlen);
|
||||
|
||||
return do_chtls_setsockopt(sk, optname, optval, optlen);
|
||||
}
|
||||
|
||||
static struct cxgb4_uld_info chtls_uld_info = {
|
||||
.name = DRV_NAME,
|
||||
.nrxq = MAX_ULD_QSETS,
|
||||
.ntxq = MAX_ULD_QSETS,
|
||||
.rxq_size = 1024,
|
||||
.add = chtls_uld_add,
|
||||
.state_change = chtls_uld_state_change,
|
||||
.rx_handler = chtls_uld_rx_handler,
|
||||
};
|
||||
|
||||
void chtls_install_cpl_ops(struct sock *sk)
|
||||
{
|
||||
sk->sk_prot = &chtls_cpl_prot;
|
||||
}
|
||||
|
||||
static void __init chtls_init_ulp_ops(void)
|
||||
{
|
||||
chtls_cpl_prot = tcp_prot;
|
||||
chtls_init_rsk_ops(&chtls_cpl_prot, &chtls_rsk_ops,
|
||||
&tcp_prot, PF_INET);
|
||||
chtls_cpl_prot.close = chtls_close;
|
||||
chtls_cpl_prot.disconnect = chtls_disconnect;
|
||||
chtls_cpl_prot.destroy = chtls_destroy_sock;
|
||||
chtls_cpl_prot.shutdown = chtls_shutdown;
|
||||
chtls_cpl_prot.setsockopt = chtls_setsockopt;
|
||||
chtls_cpl_prot.getsockopt = chtls_getsockopt;
|
||||
}
|
||||
|
||||
static int __init chtls_register(void)
|
||||
{
|
||||
chtls_init_ulp_ops();
|
||||
register_listen_notifier(&listen_notifier);
|
||||
cxgb4_register_uld(CXGB4_ULD_TLS, &chtls_uld_info);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void __exit chtls_unregister(void)
|
||||
{
|
||||
unregister_listen_notifier(&listen_notifier);
|
||||
chtls_free_all_uld();
|
||||
cxgb4_unregister_uld(CXGB4_ULD_TLS);
|
||||
}
|
||||
|
||||
module_init(chtls_register);
|
||||
module_exit(chtls_unregister);
|
||||
|
||||
MODULE_DESCRIPTION("Chelsio TLS Inline driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_AUTHOR("Chelsio Communications");
|
||||
MODULE_VERSION(DRV_VERSION);
|
||||
Loading…
Reference in New Issue
Block a user