[mirror_ubuntu-jammy-kernel.git] / net / tls / tls_toe.c

/*
 * Copyright (c) 2016-2017, Mellanox Technologies. All rights reserved.
 * Copyright (c) 2016-2017, Dave Watson <davejwatson@fb.com>. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <linux/list.h>
#include <linux/rcupdate.h>
#include <linux/spinlock.h>
#include <net/inet_connection_sock.h>
#include <net/tls.h>
#include <net/tls_toe.h>

static LIST_HEAD(device_list);
static DEFINE_SPINLOCK(device_spinlock);

static void tls_toe_sk_destruct(struct sock *sk)
{
	struct inet_connection_sock *icsk = inet_csk(sk);
	struct tls_context *ctx = tls_get_ctx(sk);

	ctx->sk_destruct(sk);
	/* Free ctx */
	rcu_assign_pointer(icsk->icsk_ulp_data, NULL);
	tls_ctx_free(sk, ctx);
}

int tls_toe_bypass(struct sock *sk)
{
	struct tls_toe_device *dev;
	struct tls_context *ctx;
	int rc = 0;

	spin_lock_bh(&device_spinlock);
	list_for_each_entry(dev, &device_list, dev_list) {
		if (dev->feature && dev->feature(dev)) {
			ctx = tls_ctx_create(sk);
			if (!ctx)
				goto out;

			ctx->sk_destruct = sk->sk_destruct;
			sk->sk_destruct = tls_toe_sk_destruct;
			ctx->rx_conf = TLS_HW_RECORD;
			ctx->tx_conf = TLS_HW_RECORD;
			update_sk_prot(sk, ctx);
			rc = 1;
			break;
		}
	}
out:
	spin_unlock_bh(&device_spinlock);
	return rc;
}

void tls_toe_unhash(struct sock *sk)
{
	struct tls_context *ctx = tls_get_ctx(sk);
	struct tls_toe_device *dev;

	spin_lock_bh(&device_spinlock);
	list_for_each_entry(dev, &device_list, dev_list) {
		if (dev->unhash) {
			kref_get(&dev->kref);
			spin_unlock_bh(&device_spinlock);
			dev->unhash(dev, sk);
			kref_put(&dev->kref, dev->release);
			spin_lock_bh(&device_spinlock);
		}
	}
	spin_unlock_bh(&device_spinlock);
	ctx->sk_proto->unhash(sk);
}

int tls_toe_hash(struct sock *sk)
{
	struct tls_context *ctx = tls_get_ctx(sk);
	struct tls_toe_device *dev;
	int err;

	err = ctx->sk_proto->hash(sk);
	spin_lock_bh(&device_spinlock);
	list_for_each_entry(dev, &device_list, dev_list) {
		if (dev->hash) {
			kref_get(&dev->kref);
			spin_unlock_bh(&device_spinlock);
			err |= dev->hash(dev, sk);
			kref_put(&dev->kref, dev->release);
			spin_lock_bh(&device_spinlock);
		}
	}
	spin_unlock_bh(&device_spinlock);

	if (err)
		tls_toe_unhash(sk);
	return err;
}

void tls_toe_register_device(struct tls_toe_device *device)
{
	spin_lock_bh(&device_spinlock);
	list_add_tail(&device->dev_list, &device_list);
	spin_unlock_bh(&device_spinlock);
}
EXPORT_SYMBOL(tls_toe_register_device);

void tls_toe_unregister_device(struct tls_toe_device *device)
{
	spin_lock_bh(&device_spinlock);
	list_del(&device->dev_list);
	spin_unlock_bh(&device_spinlock);
}
EXPORT_SYMBOL(tls_toe_unregister_device);
Commit	Line	Data
08700dab JK	1	/*
	2	* Copyright (c) 2016-2017, Mellanox Technologies. All rights reserved.
	3	* Copyright (c) 2016-2017, Dave Watson <davejwatson@fb.com>. All rights reserved.
	4	*
	5	* This software is available to you under a choice of one of two
	6	* licenses. You may choose to be licensed under the terms of the GNU
	7	* General Public License (GPL) Version 2, available from the file
	8	* COPYING in the main directory of this source tree, or the
	9	* OpenIB.org BSD license below:
	10	*
	11	* Redistribution and use in source and binary forms, with or
	12	* without modification, are permitted provided that the following
	13	* conditions are met:
	14	*
	15	* - Redistributions of source code must retain the above
	16	* copyright notice, this list of conditions and the following
	17	* disclaimer.
	18	*
	19	* - Redistributions in binary form must reproduce the above
	20	* copyright notice, this list of conditions and the following
	21	* disclaimer in the documentation and/or other materials
	22	* provided with the distribution.
	23	*
	24	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	25	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	26	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	27	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
	28	* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
	29	* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
	30	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	31	* SOFTWARE.
	32	*/
	33
	34	#include <linux/list.h>
	35	#include <linux/rcupdate.h>
	36	#include <linux/spinlock.h>
	37	#include <net/inet_connection_sock.h>
	38	#include <net/tls.h>
	39	#include <net/tls_toe.h>
	40
	41	static LIST_HEAD(device_list);
	42	static DEFINE_SPINLOCK(device_spinlock);
	43
0eb8745e	44	static void tls_toe_sk_destruct(struct sock *sk)
08700dab JK	45	{
	46	struct inet_connection_sock *icsk = inet_csk(sk);
	47	struct tls_context *ctx = tls_get_ctx(sk);
	48
	49	ctx->sk_destruct(sk);
	50	/* Free ctx */
	51	rcu_assign_pointer(icsk->icsk_ulp_data, NULL);
	52	tls_ctx_free(sk, ctx);
	53	}
	54
0eb8745e	55	int tls_toe_bypass(struct sock *sk)
08700dab JK	56	{
	57	struct tls_toe_device *dev;
	58	struct tls_context *ctx;
	59	int rc = 0;
	60
	61	spin_lock_bh(&device_spinlock);
	62	list_for_each_entry(dev, &device_list, dev_list) {
	63	if (dev->feature && dev->feature(dev)) {
	64	ctx = tls_ctx_create(sk);
	65	if (!ctx)
	66	goto out;
	67
	68	ctx->sk_destruct = sk->sk_destruct;
0eb8745e	69	sk->sk_destruct = tls_toe_sk_destruct;
08700dab JK	70	ctx->rx_conf = TLS_HW_RECORD;
	71	ctx->tx_conf = TLS_HW_RECORD;
	72	update_sk_prot(sk, ctx);
	73	rc = 1;
	74	break;
	75	}
	76	}
	77	out:
	78	spin_unlock_bh(&device_spinlock);
	79	return rc;
	80	}
	81
0eb8745e	82	void tls_toe_unhash(struct sock *sk)
08700dab JK	83	{
	84	struct tls_context *ctx = tls_get_ctx(sk);
	85	struct tls_toe_device *dev;
	86
	87	spin_lock_bh(&device_spinlock);
	88	list_for_each_entry(dev, &device_list, dev_list) {
	89	if (dev->unhash) {
	90	kref_get(&dev->kref);
	91	spin_unlock_bh(&device_spinlock);
	92	dev->unhash(dev, sk);
	93	kref_put(&dev->kref, dev->release);
	94	spin_lock_bh(&device_spinlock);
	95	}
	96	}
	97	spin_unlock_bh(&device_spinlock);
	98	ctx->sk_proto->unhash(sk);
	99	}
	100
0eb8745e	101	int tls_toe_hash(struct sock *sk)
08700dab JK	102	{
	103	struct tls_context *ctx = tls_get_ctx(sk);
	104	struct tls_toe_device *dev;
	105	int err;
	106
	107	err = ctx->sk_proto->hash(sk);
	108	spin_lock_bh(&device_spinlock);
	109	list_for_each_entry(dev, &device_list, dev_list) {
	110	if (dev->hash) {
	111	kref_get(&dev->kref);
	112	spin_unlock_bh(&device_spinlock);
	113	err \|= dev->hash(dev, sk);
	114	kref_put(&dev->kref, dev->release);
	115	spin_lock_bh(&device_spinlock);
	116	}
	117	}
	118	spin_unlock_bh(&device_spinlock);
	119
	120	if (err)
0eb8745e	121	tls_toe_unhash(sk);
08700dab JK	122	return err;
	123	}
	124
	125	void tls_toe_register_device(struct tls_toe_device *device)
	126	{
	127	spin_lock_bh(&device_spinlock);
	128	list_add_tail(&device->dev_list, &device_list);
	129	spin_unlock_bh(&device_spinlock);
	130	}
	131	EXPORT_SYMBOL(tls_toe_register_device);
	132
	133	void tls_toe_unregister_device(struct tls_toe_device *device)
	134	{
	135	spin_lock_bh(&device_spinlock);
	136	list_del(&device->dev_list);
	137	spin_unlock_bh(&device_spinlock);
	138	}
	139	EXPORT_SYMBOL(tls_toe_unregister_device);