mirror of https://gitee.com/openkylin/linux.git
140 lines
3.9 KiB
C
140 lines
3.9 KiB
C
/*
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* Copyright (c) 2016-2017, Mellanox Technologies. All rights reserved.
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* Copyright (c) 2016-2017, Dave Watson <davejwatson@fb.com>. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/list.h>
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#include <linux/rcupdate.h>
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#include <linux/spinlock.h>
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#include <net/inet_connection_sock.h>
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#include <net/tls.h>
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#include <net/tls_toe.h>
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static LIST_HEAD(device_list);
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static DEFINE_SPINLOCK(device_spinlock);
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static void tls_toe_sk_destruct(struct sock *sk)
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{
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struct inet_connection_sock *icsk = inet_csk(sk);
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struct tls_context *ctx = tls_get_ctx(sk);
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ctx->sk_destruct(sk);
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/* Free ctx */
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rcu_assign_pointer(icsk->icsk_ulp_data, NULL);
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tls_ctx_free(sk, ctx);
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}
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int tls_toe_bypass(struct sock *sk)
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{
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struct tls_toe_device *dev;
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struct tls_context *ctx;
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int rc = 0;
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spin_lock_bh(&device_spinlock);
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list_for_each_entry(dev, &device_list, dev_list) {
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if (dev->feature && dev->feature(dev)) {
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ctx = tls_ctx_create(sk);
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if (!ctx)
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goto out;
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ctx->sk_destruct = sk->sk_destruct;
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sk->sk_destruct = tls_toe_sk_destruct;
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ctx->rx_conf = TLS_HW_RECORD;
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ctx->tx_conf = TLS_HW_RECORD;
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update_sk_prot(sk, ctx);
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rc = 1;
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break;
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}
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}
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out:
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spin_unlock_bh(&device_spinlock);
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return rc;
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}
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void tls_toe_unhash(struct sock *sk)
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{
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struct tls_context *ctx = tls_get_ctx(sk);
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struct tls_toe_device *dev;
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spin_lock_bh(&device_spinlock);
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list_for_each_entry(dev, &device_list, dev_list) {
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if (dev->unhash) {
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kref_get(&dev->kref);
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spin_unlock_bh(&device_spinlock);
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dev->unhash(dev, sk);
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kref_put(&dev->kref, dev->release);
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spin_lock_bh(&device_spinlock);
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}
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}
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spin_unlock_bh(&device_spinlock);
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ctx->sk_proto->unhash(sk);
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}
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int tls_toe_hash(struct sock *sk)
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{
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struct tls_context *ctx = tls_get_ctx(sk);
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struct tls_toe_device *dev;
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int err;
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err = ctx->sk_proto->hash(sk);
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spin_lock_bh(&device_spinlock);
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list_for_each_entry(dev, &device_list, dev_list) {
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if (dev->hash) {
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kref_get(&dev->kref);
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spin_unlock_bh(&device_spinlock);
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err |= dev->hash(dev, sk);
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kref_put(&dev->kref, dev->release);
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spin_lock_bh(&device_spinlock);
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}
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}
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spin_unlock_bh(&device_spinlock);
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if (err)
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tls_toe_unhash(sk);
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return err;
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}
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void tls_toe_register_device(struct tls_toe_device *device)
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{
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spin_lock_bh(&device_spinlock);
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list_add_tail(&device->dev_list, &device_list);
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spin_unlock_bh(&device_spinlock);
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}
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EXPORT_SYMBOL(tls_toe_register_device);
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void tls_toe_unregister_device(struct tls_toe_device *device)
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{
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spin_lock_bh(&device_spinlock);
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list_del(&device->dev_list);
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spin_unlock_bh(&device_spinlock);
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}
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EXPORT_SYMBOL(tls_toe_unregister_device);
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