tls_toe.c 3.9 KB

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  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. #include <linux/list.h>
  34. #include <linux/rcupdate.h>
  35. #include <linux/spinlock.h>
  36. #include <net/inet_connection_sock.h>
  37. #include <net/tls.h>
  38. #include <net/tls_toe.h>
  39. static LIST_HEAD(device_list);
  40. static DEFINE_SPINLOCK(device_spinlock);
  41. static void tls_toe_sk_destruct(struct sock *sk)
  42. {
  43. struct inet_connection_sock *icsk = inet_csk(sk);
  44. struct tls_context *ctx = tls_get_ctx(sk);
  45. ctx->sk_destruct(sk);
  46. /* Free ctx */
  47. rcu_assign_pointer(icsk->icsk_ulp_data, NULL);
  48. tls_ctx_free(sk, ctx);
  49. }
  50. int tls_toe_bypass(struct sock *sk)
  51. {
  52. struct tls_toe_device *dev;
  53. struct tls_context *ctx;
  54. int rc = 0;
  55. spin_lock_bh(&device_spinlock);
  56. list_for_each_entry(dev, &device_list, dev_list) {
  57. if (dev->feature && dev->feature(dev)) {
  58. ctx = tls_ctx_create(sk);
  59. if (!ctx)
  60. goto out;
  61. ctx->sk_destruct = sk->sk_destruct;
  62. sk->sk_destruct = tls_toe_sk_destruct;
  63. ctx->rx_conf = TLS_HW_RECORD;
  64. ctx->tx_conf = TLS_HW_RECORD;
  65. update_sk_prot(sk, ctx);
  66. rc = 1;
  67. break;
  68. }
  69. }
  70. out:
  71. spin_unlock_bh(&device_spinlock);
  72. return rc;
  73. }
  74. void tls_toe_unhash(struct sock *sk)
  75. {
  76. struct tls_context *ctx = tls_get_ctx(sk);
  77. struct tls_toe_device *dev;
  78. spin_lock_bh(&device_spinlock);
  79. list_for_each_entry(dev, &device_list, dev_list) {
  80. if (dev->unhash) {
  81. kref_get(&dev->kref);
  82. spin_unlock_bh(&device_spinlock);
  83. dev->unhash(dev, sk);
  84. kref_put(&dev->kref, dev->release);
  85. spin_lock_bh(&device_spinlock);
  86. }
  87. }
  88. spin_unlock_bh(&device_spinlock);
  89. ctx->sk_proto->unhash(sk);
  90. }
  91. int tls_toe_hash(struct sock *sk)
  92. {
  93. struct tls_context *ctx = tls_get_ctx(sk);
  94. struct tls_toe_device *dev;
  95. int err;
  96. err = ctx->sk_proto->hash(sk);
  97. spin_lock_bh(&device_spinlock);
  98. list_for_each_entry(dev, &device_list, dev_list) {
  99. if (dev->hash) {
  100. kref_get(&dev->kref);
  101. spin_unlock_bh(&device_spinlock);
  102. err |= dev->hash(dev, sk);
  103. kref_put(&dev->kref, dev->release);
  104. spin_lock_bh(&device_spinlock);
  105. }
  106. }
  107. spin_unlock_bh(&device_spinlock);
  108. if (err)
  109. tls_toe_unhash(sk);
  110. return err;
  111. }
  112. void tls_toe_register_device(struct tls_toe_device *device)
  113. {
  114. spin_lock_bh(&device_spinlock);
  115. list_add_tail(&device->dev_list, &device_list);
  116. spin_unlock_bh(&device_spinlock);
  117. }
  118. EXPORT_SYMBOL(tls_toe_register_device);
  119. void tls_toe_unregister_device(struct tls_toe_device *device)
  120. {
  121. spin_lock_bh(&device_spinlock);
  122. list_del(&device->dev_list);
  123. spin_unlock_bh(&device_spinlock);
  124. }
  125. EXPORT_SYMBOL(tls_toe_unregister_device);