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net/tls/tls_device.c
34.4 KB
e8f697998 net/tls: Add gene... |
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/* Copyright (c) 2018, Mellanox Technologies 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 <crypto/aead.h> #include <linux/highmem.h> #include <linux/module.h> #include <linux/netdevice.h> #include <net/dst.h> #include <net/inet_connection_sock.h> #include <net/tcp.h> #include <net/tls.h> |
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#include "trace.h" |
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/* device_offload_lock is used to synchronize tls_dev_add * against NETDEV_DOWN notifications. */ static DECLARE_RWSEM(device_offload_lock); static void tls_device_gc_task(struct work_struct *work); static DECLARE_WORK(tls_device_gc_work, tls_device_gc_task); static LIST_HEAD(tls_device_gc_list); static LIST_HEAD(tls_device_list); static DEFINE_SPINLOCK(tls_device_lock); static void tls_device_free_ctx(struct tls_context *ctx) { |
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if (ctx->tx_conf == TLS_HW) { |
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kfree(tls_offload_ctx_tx(ctx)); |
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kfree(ctx->tx.rec_seq); kfree(ctx->tx.iv); } |
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if (ctx->rx_conf == TLS_HW) kfree(tls_offload_ctx_rx(ctx)); |
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|
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tls_ctx_free(NULL, ctx); |
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} static void tls_device_gc_task(struct work_struct *work) { struct tls_context *ctx, *tmp; unsigned long flags; LIST_HEAD(gc_list); spin_lock_irqsave(&tls_device_lock, flags); list_splice_init(&tls_device_gc_list, &gc_list); spin_unlock_irqrestore(&tls_device_lock, flags); list_for_each_entry_safe(ctx, tmp, &gc_list, list) { struct net_device *netdev = ctx->netdev; |
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if (netdev && ctx->tx_conf == TLS_HW) { |
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netdev->tlsdev_ops->tls_dev_del(netdev, ctx, TLS_OFFLOAD_CTX_DIR_TX); dev_put(netdev); |
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ctx->netdev = NULL; |
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} list_del(&ctx->list); tls_device_free_ctx(ctx); } } static void tls_device_queue_ctx_destruction(struct tls_context *ctx) { unsigned long flags; spin_lock_irqsave(&tls_device_lock, flags); list_move_tail(&ctx->list, &tls_device_gc_list); /* schedule_work inside the spinlock * to make sure tls_device_down waits for that work. */ schedule_work(&tls_device_gc_work); spin_unlock_irqrestore(&tls_device_lock, flags); } /* We assume that the socket is already connected */ static struct net_device *get_netdev_for_sock(struct sock *sk) { struct dst_entry *dst = sk_dst_get(sk); struct net_device *netdev = NULL; if (likely(dst)) { netdev = dst->dev; dev_hold(netdev); } dst_release(dst); return netdev; } static void destroy_record(struct tls_record_info *record) { |
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int i; |
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|
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for (i = 0; i < record->num_frags; i++) __skb_frag_unref(&record->frags[i]); |
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kfree(record); } |
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static void delete_all_records(struct tls_offload_context_tx *offload_ctx) |
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{ struct tls_record_info *info, *temp; list_for_each_entry_safe(info, temp, &offload_ctx->records_list, list) { list_del(&info->list); destroy_record(info); } offload_ctx->retransmit_hint = NULL; } static void tls_icsk_clean_acked(struct sock *sk, u32 acked_seq) { struct tls_context *tls_ctx = tls_get_ctx(sk); struct tls_record_info *info, *temp; |
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struct tls_offload_context_tx *ctx; |
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u64 deleted_records = 0; unsigned long flags; if (!tls_ctx) return; |
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ctx = tls_offload_ctx_tx(tls_ctx); |
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spin_lock_irqsave(&ctx->lock, flags); info = ctx->retransmit_hint; |
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if (info && !before(acked_seq, info->end_seq)) |
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ctx->retransmit_hint = NULL; |
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list_for_each_entry_safe(info, temp, &ctx->records_list, list) { if (before(acked_seq, info->end_seq)) break; list_del(&info->list); destroy_record(info); deleted_records++; } ctx->unacked_record_sn += deleted_records; spin_unlock_irqrestore(&ctx->lock, flags); } /* At this point, there should be no references on this * socket and no in-flight SKBs associated with this * socket, so it is safe to free all the resources. */ |
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void tls_device_sk_destruct(struct sock *sk) |
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{ struct tls_context *tls_ctx = tls_get_ctx(sk); |
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struct tls_offload_context_tx *ctx = tls_offload_ctx_tx(tls_ctx); |
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|
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tls_ctx->sk_destruct(sk); |
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|
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if (tls_ctx->tx_conf == TLS_HW) { if (ctx->open_record) destroy_record(ctx->open_record); delete_all_records(ctx); crypto_free_aead(ctx->aead_send); clean_acked_data_disable(inet_csk(sk)); } |
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if (refcount_dec_and_test(&tls_ctx->refcount)) tls_device_queue_ctx_destruction(tls_ctx); } |
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EXPORT_SYMBOL_GPL(tls_device_sk_destruct); |
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|
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void tls_device_free_resources_tx(struct sock *sk) { struct tls_context *tls_ctx = tls_get_ctx(sk); tls_free_partial_record(sk, tls_ctx); } |
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void tls_offload_tx_resync_request(struct sock *sk, u32 got_seq, u32 exp_seq) { struct tls_context *tls_ctx = tls_get_ctx(sk); trace_tls_device_tx_resync_req(sk, got_seq, exp_seq); WARN_ON(test_and_set_bit(TLS_TX_SYNC_SCHED, &tls_ctx->flags)); } EXPORT_SYMBOL_GPL(tls_offload_tx_resync_request); |
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static void tls_device_resync_tx(struct sock *sk, struct tls_context *tls_ctx, u32 seq) { struct net_device *netdev; struct sk_buff *skb; |
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int err = 0; |
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u8 *rcd_sn; skb = tcp_write_queue_tail(sk); if (skb) TCP_SKB_CB(skb)->eor = 1; rcd_sn = tls_ctx->tx.rec_seq; |
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trace_tls_device_tx_resync_send(sk, seq, rcd_sn); |
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down_read(&device_offload_lock); netdev = tls_ctx->netdev; if (netdev) |
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err = netdev->tlsdev_ops->tls_dev_resync(netdev, sk, seq, rcd_sn, TLS_OFFLOAD_CTX_DIR_TX); |
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up_read(&device_offload_lock); |
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if (err) return; |
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clear_bit_unlock(TLS_TX_SYNC_SCHED, &tls_ctx->flags); } |
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static void tls_append_frag(struct tls_record_info *record, struct page_frag *pfrag, int size) { skb_frag_t *frag; frag = &record->frags[record->num_frags - 1]; |
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if (skb_frag_page(frag) == pfrag->page && |
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skb_frag_off(frag) + skb_frag_size(frag) == pfrag->offset) { |
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skb_frag_size_add(frag, size); |
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} else { ++frag; |
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__skb_frag_set_page(frag, pfrag->page); |
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skb_frag_off_set(frag, pfrag->offset); |
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skb_frag_size_set(frag, size); |
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++record->num_frags; get_page(pfrag->page); } pfrag->offset += size; record->len += size; } static int tls_push_record(struct sock *sk, struct tls_context *ctx, |
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struct tls_offload_context_tx *offload_ctx, |
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struct tls_record_info *record, |
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int flags) |
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{ |
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struct tls_prot_info *prot = &ctx->prot_info; |
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struct tcp_sock *tp = tcp_sk(sk); |
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skb_frag_t *frag; int i; |
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record->end_seq = tp->write_seq + record->len; |
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list_add_tail_rcu(&record->list, &offload_ctx->records_list); |
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offload_ctx->open_record = NULL; |
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if (test_bit(TLS_TX_SYNC_SCHED, &ctx->flags)) tls_device_resync_tx(sk, ctx, tp->write_seq); |
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tls_advance_record_sn(sk, prot, &ctx->tx); |
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for (i = 0; i < record->num_frags; i++) { frag = &record->frags[i]; sg_unmark_end(&offload_ctx->sg_tx_data[i]); sg_set_page(&offload_ctx->sg_tx_data[i], skb_frag_page(frag), |
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skb_frag_size(frag), skb_frag_off(frag)); |
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sk_mem_charge(sk, skb_frag_size(frag)); |
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get_page(skb_frag_page(frag)); } sg_mark_end(&offload_ctx->sg_tx_data[record->num_frags - 1]); /* all ready, send */ return tls_push_sg(sk, ctx, offload_ctx->sg_tx_data, 0, flags); } |
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static int tls_device_record_close(struct sock *sk, struct tls_context *ctx, struct tls_record_info *record, struct page_frag *pfrag, unsigned char record_type) { struct tls_prot_info *prot = &ctx->prot_info; int ret; /* append tag * device will fill in the tag, we just need to append a placeholder * use socket memory to improve coalescing (re-using a single buffer * increases frag count) * if we can't allocate memory now, steal some back from data */ if (likely(skb_page_frag_refill(prot->tag_size, pfrag, sk->sk_allocation))) { ret = 0; tls_append_frag(record, pfrag, prot->tag_size); } else { ret = prot->tag_size; if (record->len <= prot->overhead_size) return -ENOMEM; } /* fill prepend */ tls_fill_prepend(ctx, skb_frag_address(&record->frags[0]), record->len - prot->overhead_size, record_type, prot->version); return ret; } |
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static int tls_create_new_record(struct tls_offload_context_tx *offload_ctx, |
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struct page_frag *pfrag, size_t prepend_size) { struct tls_record_info *record; skb_frag_t *frag; record = kmalloc(sizeof(*record), GFP_KERNEL); if (!record) return -ENOMEM; frag = &record->frags[0]; __skb_frag_set_page(frag, pfrag->page); |
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skb_frag_off_set(frag, pfrag->offset); |
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skb_frag_size_set(frag, prepend_size); get_page(pfrag->page); pfrag->offset += prepend_size; record->num_frags = 1; record->len = prepend_size; offload_ctx->open_record = record; return 0; } static int tls_do_allocation(struct sock *sk, |
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struct tls_offload_context_tx *offload_ctx, |
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struct page_frag *pfrag, size_t prepend_size) { int ret; if (!offload_ctx->open_record) { if (unlikely(!skb_page_frag_refill(prepend_size, pfrag, sk->sk_allocation))) { |
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READ_ONCE(sk->sk_prot)->enter_memory_pressure(sk); |
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sk_stream_moderate_sndbuf(sk); return -ENOMEM; } ret = tls_create_new_record(offload_ctx, pfrag, prepend_size); if (ret) return ret; if (pfrag->size > pfrag->offset) return 0; } if (!sk_page_frag_refill(sk, pfrag)) return -ENOMEM; return 0; } |
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static int tls_device_copy_data(void *addr, size_t bytes, struct iov_iter *i) { size_t pre_copy, nocache; pre_copy = ~((unsigned long)addr - 1) & (SMP_CACHE_BYTES - 1); if (pre_copy) { pre_copy = min(pre_copy, bytes); if (copy_from_iter(addr, pre_copy, i) != pre_copy) return -EFAULT; bytes -= pre_copy; addr += pre_copy; } nocache = round_down(bytes, SMP_CACHE_BYTES); if (copy_from_iter_nocache(addr, nocache, i) != nocache) return -EFAULT; bytes -= nocache; addr += nocache; if (bytes && copy_from_iter(addr, bytes, i) != bytes) return -EFAULT; return 0; } |
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static int tls_push_data(struct sock *sk, struct iov_iter *msg_iter, size_t size, int flags, unsigned char record_type) { struct tls_context *tls_ctx = tls_get_ctx(sk); |
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struct tls_prot_info *prot = &tls_ctx->prot_info; |
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struct tls_offload_context_tx *ctx = tls_offload_ctx_tx(tls_ctx); |
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struct tls_record_info *record = ctx->open_record; |
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int tls_push_record_flags; |
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struct page_frag *pfrag; size_t orig_size = size; u32 max_open_record_len; |
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bool more = false; |
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bool done = false; |
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int copy, rc = 0; |
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long timeo; if (flags & ~(MSG_MORE | MSG_DONTWAIT | MSG_NOSIGNAL | MSG_SENDPAGE_NOTLAST)) |
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return -EOPNOTSUPP; |
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|
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if (unlikely(sk->sk_err)) |
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return -sk->sk_err; |
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flags |= MSG_SENDPAGE_DECRYPTED; tls_push_record_flags = flags | MSG_SENDPAGE_NOTLAST; |
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timeo = sock_sndtimeo(sk, flags & MSG_DONTWAIT); |
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if (tls_is_partially_sent_record(tls_ctx)) { rc = tls_push_partial_record(sk, tls_ctx, flags); if (rc < 0) return rc; } |
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pfrag = sk_page_frag(sk); /* TLS_HEADER_SIZE is not counted as part of the TLS record, and * we need to leave room for an authentication tag. */ max_open_record_len = TLS_MAX_PAYLOAD_SIZE + |
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prot->prepend_size; |
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do { |
34ef1ed19 net/tls: make all... |
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rc = tls_do_allocation(sk, ctx, pfrag, prot->prepend_size); if (unlikely(rc)) { |
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rc = sk_stream_wait_memory(sk, &timeo); if (!rc) continue; record = ctx->open_record; if (!record) break; handle_error: if (record_type != TLS_RECORD_TYPE_DATA) { /* avoid sending partial * record with type != * application_data */ size = orig_size; destroy_record(record); ctx->open_record = NULL; |
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} else if (record->len > prot->prepend_size) { |
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goto last_record; } break; } record = ctx->open_record; copy = min_t(size_t, size, (pfrag->size - pfrag->offset)); copy = min_t(size_t, copy, (max_open_record_len - record->len)); |
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rc = tls_device_copy_data(page_address(pfrag->page) + pfrag->offset, copy, msg_iter); if (rc) |
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goto handle_error; |
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tls_append_frag(record, pfrag, copy); size -= copy; if (!size) { last_record: tls_push_record_flags = flags; |
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if (flags & (MSG_SENDPAGE_NOTLAST | MSG_MORE)) { more = true; |
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break; } done = true; } if (done || record->len >= max_open_record_len || (record->num_frags >= MAX_SKB_FRAGS - 1)) { |
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rc = tls_device_record_close(sk, tls_ctx, record, pfrag, record_type); if (rc) { if (rc > 0) { size += rc; } else { size = orig_size; destroy_record(record); ctx->open_record = NULL; break; } } |
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rc = tls_push_record(sk, tls_ctx, ctx, record, |
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tls_push_record_flags); |
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if (rc < 0) break; } } while (!done); |
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tls_ctx->pending_open_record_frags = more; |
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if (orig_size - size > 0) rc = orig_size - size; return rc; } int tls_device_sendmsg(struct sock *sk, struct msghdr *msg, size_t size) { unsigned char record_type = TLS_RECORD_TYPE_DATA; |
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struct tls_context *tls_ctx = tls_get_ctx(sk); |
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int rc; |
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mutex_lock(&tls_ctx->tx_lock); |
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lock_sock(sk); if (unlikely(msg->msg_controllen)) { rc = tls_proccess_cmsg(sk, msg, &record_type); if (rc) goto out; } rc = tls_push_data(sk, &msg->msg_iter, size, msg->msg_flags, record_type); out: release_sock(sk); |
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mutex_unlock(&tls_ctx->tx_lock); |
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return rc; } int tls_device_sendpage(struct sock *sk, struct page *page, int offset, size_t size, int flags) { |
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struct tls_context *tls_ctx = tls_get_ctx(sk); |
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struct iov_iter msg_iter; |
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char *kaddr; |
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struct kvec iov; int rc; if (flags & MSG_SENDPAGE_NOTLAST) flags |= MSG_MORE; |
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mutex_lock(&tls_ctx->tx_lock); |
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lock_sock(sk); if (flags & MSG_OOB) { |
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rc = -EOPNOTSUPP; |
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goto out; } |
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556 |
kaddr = kmap(page); |
e8f697998 net/tls: Add gene... |
557 558 |
iov.iov_base = kaddr + offset; iov.iov_len = size; |
aa563d7bc iov_iter: Separat... |
559 |
iov_iter_kvec(&msg_iter, WRITE, &iov, 1, size); |
e8f697998 net/tls: Add gene... |
560 561 562 563 564 565 |
rc = tls_push_data(sk, &msg_iter, size, flags, TLS_RECORD_TYPE_DATA); kunmap(page); out: release_sock(sk); |
79ffe6087 net/tls: add a TX... |
566 |
mutex_unlock(&tls_ctx->tx_lock); |
e8f697998 net/tls: Add gene... |
567 568 |
return rc; } |
d80a1b9d1 tls: Refactor tls... |
569 |
struct tls_record_info *tls_get_record(struct tls_offload_context_tx *context, |
e8f697998 net/tls: Add gene... |
570 571 572 |
u32 seq, u64 *p_record_sn) { u64 record_sn = context->hint_record_sn; |
06f5201c6 net/tls: Fix to a... |
573 |
struct tls_record_info *info, *last; |
e8f697998 net/tls: Add gene... |
574 575 576 577 578 579 580 |
info = context->retransmit_hint; if (!info || before(seq, info->end_seq - info->len)) { /* if retransmit_hint is irrelevant start * from the beggining of the list */ |
d4774ac0d net/tls: use RCU ... |
581 582 583 584 |
info = list_first_entry_or_null(&context->records_list, struct tls_record_info, list); if (!info) return NULL; |
06f5201c6 net/tls: Fix to a... |
585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 |
/* send the start_marker record if seq number is before the * tls offload start marker sequence number. This record is * required to handle TCP packets which are before TLS offload * started. * And if it's not start marker, look if this seq number * belongs to the list. */ if (likely(!tls_record_is_start_marker(info))) { /* we have the first record, get the last record to see * if this seq number belongs to the list. */ last = list_last_entry(&context->records_list, struct tls_record_info, list); if (!between(seq, tls_record_start_seq(info), last->end_seq)) return NULL; } |
e8f697998 net/tls: Add gene... |
603 604 |
record_sn = context->unacked_record_sn; } |
d4774ac0d net/tls: use RCU ... |
605 606 607 |
/* We just need the _rcu for the READ_ONCE() */ rcu_read_lock(); list_for_each_entry_from_rcu(info, &context->records_list, list) { |
e8f697998 net/tls: Add gene... |
608 609 610 611 612 613 614 615 |
if (before(seq, info->end_seq)) { if (!context->retransmit_hint || after(info->end_seq, context->retransmit_hint->end_seq)) { context->hint_record_sn = record_sn; context->retransmit_hint = info; } *p_record_sn = record_sn; |
d4774ac0d net/tls: use RCU ... |
616 |
goto exit_rcu_unlock; |
e8f697998 net/tls: Add gene... |
617 618 619 |
} record_sn++; } |
d4774ac0d net/tls: use RCU ... |
620 |
info = NULL; |
e8f697998 net/tls: Add gene... |
621 |
|
d4774ac0d net/tls: use RCU ... |
622 623 624 |
exit_rcu_unlock: rcu_read_unlock(); return info; |
e8f697998 net/tls: Add gene... |
625 626 627 628 629 630 |
} EXPORT_SYMBOL(tls_get_record); static int tls_device_push_pending_record(struct sock *sk, int flags) { struct iov_iter msg_iter; |
aa563d7bc iov_iter: Separat... |
631 |
iov_iter_kvec(&msg_iter, WRITE, NULL, 0, 0); |
e8f697998 net/tls: Add gene... |
632 633 |
return tls_push_data(sk, &msg_iter, 0, flags, TLS_RECORD_TYPE_DATA); } |
7463d3a2d tls: Fix write sp... |
634 635 |
void tls_device_write_space(struct sock *sk, struct tls_context *ctx) { |
02b1fa07b net/tls: don't pa... |
636 |
if (tls_is_partially_sent_record(ctx)) { |
7463d3a2d tls: Fix write sp... |
637 |
gfp_t sk_allocation = sk->sk_allocation; |
02b1fa07b net/tls: don't pa... |
638 |
WARN_ON_ONCE(sk->sk_write_pending); |
7463d3a2d tls: Fix write sp... |
639 |
sk->sk_allocation = GFP_ATOMIC; |
414776621 net/tls: prevent ... |
640 641 642 |
tls_push_partial_record(sk, ctx, MSG_DONTWAIT | MSG_NOSIGNAL | MSG_SENDPAGE_DECRYPTED); |
7463d3a2d tls: Fix write sp... |
643 644 |
sk->sk_allocation = sk_allocation; } |
7463d3a2d tls: Fix write sp... |
645 |
} |
e52972c11 net/tls: replace ... |
646 |
static void tls_device_resync_rx(struct tls_context *tls_ctx, |
89fec474f net/tls: pass rec... |
647 |
struct sock *sk, u32 seq, u8 *rcd_sn) |
e52972c11 net/tls: replace ... |
648 |
{ |
8538d29ce net/tls: add trac... |
649 |
struct tls_offload_context_rx *rx_ctx = tls_offload_ctx_rx(tls_ctx); |
e52972c11 net/tls: replace ... |
650 651 652 653 |
struct net_device *netdev; if (WARN_ON(test_and_set_bit(TLS_RX_SYNC_RUNNING, &tls_ctx->flags))) return; |
8538d29ce net/tls: add trac... |
654 655 |
trace_tls_device_rx_resync_send(sk, seq, rcd_sn, rx_ctx->resync_type); |
e52972c11 net/tls: replace ... |
656 657 |
netdev = READ_ONCE(tls_ctx->netdev); if (netdev) |
eeb2efaf3 net/tls: generali... |
658 659 |
netdev->tlsdev_ops->tls_dev_resync(netdev, sk, seq, rcd_sn, TLS_OFFLOAD_CTX_DIR_RX); |
e52972c11 net/tls: replace ... |
660 |
clear_bit_unlock(TLS_RX_SYNC_RUNNING, &tls_ctx->flags); |
a4d26fdbc net/tls: add TlsD... |
661 |
TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSRXDEVICERESYNC); |
e52972c11 net/tls: replace ... |
662 |
} |
ed9b7646b net/tls: Add asyn... |
663 664 |
static bool tls_device_rx_resync_async(struct tls_offload_resync_async *resync_async, |
138559b9f net/tls: Fix wron... |
665 |
s64 resync_req, u32 *seq, u16 *rcd_delta) |
ed9b7646b net/tls: Add asyn... |
666 667 668 669 |
{ u32 is_async = resync_req & RESYNC_REQ_ASYNC; u32 req_seq = resync_req >> 32; u32 req_end = req_seq + ((resync_req >> 16) & 0xffff); |
138559b9f net/tls: Fix wron... |
670 671 672 |
u16 i; *rcd_delta = 0; |
ed9b7646b net/tls: Add asyn... |
673 674 |
if (is_async) { |
138559b9f net/tls: Fix wron... |
675 676 677 678 679 |
/* shouldn't get to wraparound: * too long in async stage, something bad happened */ if (WARN_ON_ONCE(resync_async->rcd_delta == USHRT_MAX)) return false; |
ed9b7646b net/tls: Add asyn... |
680 681 682 |
/* asynchronous stage: log all headers seq such that * req_seq <= seq <= end_seq, and wait for real resync request */ |
138559b9f net/tls: Fix wron... |
683 684 685 |
if (before(*seq, req_seq)) return false; if (!after(*seq, req_end) && |
ed9b7646b net/tls: Add asyn... |
686 687 |
resync_async->loglen < TLS_DEVICE_RESYNC_ASYNC_LOGMAX) resync_async->log[resync_async->loglen++] = *seq; |
138559b9f net/tls: Fix wron... |
688 |
resync_async->rcd_delta++; |
ed9b7646b net/tls: Add asyn... |
689 690 691 692 693 694 |
return false; } /* synchronous stage: check against the logged entries and * proceed to check the next entries if no match was found */ |
138559b9f net/tls: Fix wron... |
695 696 697 698 |
for (i = 0; i < resync_async->loglen; i++) if (req_seq == resync_async->log[i] && atomic64_try_cmpxchg(&resync_async->req, &resync_req, 0)) { *rcd_delta = resync_async->rcd_delta - i; |
ed9b7646b net/tls: Add asyn... |
699 |
*seq = req_seq; |
138559b9f net/tls: Fix wron... |
700 701 |
resync_async->loglen = 0; resync_async->rcd_delta = 0; |
ed9b7646b net/tls: Add asyn... |
702 703 |
return true; } |
138559b9f net/tls: Fix wron... |
704 705 706 |
resync_async->loglen = 0; resync_async->rcd_delta = 0; |
ed9b7646b net/tls: Add asyn... |
707 708 709 710 711 712 713 714 |
if (req_seq == *seq && atomic64_try_cmpxchg(&resync_async->req, &resync_req, 0)) return true; return false; } |
f953d33ba net/tls: add kern... |
715 |
void tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq) |
4799ac81e tls: Add rx inlin... |
716 717 |
{ struct tls_context *tls_ctx = tls_get_ctx(sk); |
4799ac81e tls: Add rx inlin... |
718 |
struct tls_offload_context_rx *rx_ctx; |
f953d33ba net/tls: add kern... |
719 |
u8 rcd_sn[TLS_MAX_REC_SEQ_SIZE]; |
acb5a07aa Revert "net/tls: ... |
720 |
u32 sock_data, is_req_pending; |
f953d33ba net/tls: add kern... |
721 |
struct tls_prot_info *prot; |
4799ac81e tls: Add rx inlin... |
722 |
s64 resync_req; |
138559b9f net/tls: Fix wron... |
723 |
u16 rcd_delta; |
4799ac81e tls: Add rx inlin... |
724 725 726 727 |
u32 req_seq; if (tls_ctx->rx_conf != TLS_HW) return; |
f953d33ba net/tls: add kern... |
728 |
prot = &tls_ctx->prot_info; |
4799ac81e tls: Add rx inlin... |
729 |
rx_ctx = tls_offload_ctx_rx(tls_ctx); |
f953d33ba net/tls: add kern... |
730 731 732 733 734 735 736 |
memcpy(rcd_sn, tls_ctx->rx.rec_seq, prot->rec_seq_size); switch (rx_ctx->resync_type) { case TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ: resync_req = atomic64_read(&rx_ctx->resync_req); req_seq = resync_req >> 32; seq += TLS_HEADER_SIZE - 1; |
acb5a07aa Revert "net/tls: ... |
737 |
is_req_pending = resync_req; |
f953d33ba net/tls: add kern... |
738 |
|
acb5a07aa Revert "net/tls: ... |
739 |
if (likely(!is_req_pending) || req_seq != seq || |
f953d33ba net/tls: add kern... |
740 741 742 743 744 745 746 747 748 749 |
!atomic64_try_cmpxchg(&rx_ctx->resync_req, &resync_req, 0)) return; break; case TLS_OFFLOAD_SYNC_TYPE_CORE_NEXT_HINT: if (likely(!rx_ctx->resync_nh_do_now)) return; /* head of next rec is already in, note that the sock_inq will * include the currently parsed message when called from parser */ |
8538d29ce net/tls: add trac... |
750 751 752 753 |
sock_data = tcp_inq(sk); if (sock_data > rcd_len) { trace_tls_device_rx_resync_nh_delay(sk, sock_data, rcd_len); |
f953d33ba net/tls: add kern... |
754 |
return; |
8538d29ce net/tls: add trac... |
755 |
} |
f953d33ba net/tls: add kern... |
756 757 758 759 760 |
rx_ctx->resync_nh_do_now = 0; seq += rcd_len; tls_bigint_increment(rcd_sn, prot->rec_seq_size); break; |
ed9b7646b net/tls: Add asyn... |
761 762 763 764 765 766 767 |
case TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ_ASYNC: resync_req = atomic64_read(&rx_ctx->resync_async->req); is_req_pending = resync_req; if (likely(!is_req_pending)) return; if (!tls_device_rx_resync_async(rx_ctx->resync_async, |
138559b9f net/tls: Fix wron... |
768 |
resync_req, &seq, &rcd_delta)) |
ed9b7646b net/tls: Add asyn... |
769 |
return; |
138559b9f net/tls: Fix wron... |
770 |
tls_bigint_subtract(rcd_sn, rcd_delta); |
ed9b7646b net/tls: Add asyn... |
771 |
break; |
f953d33ba net/tls: add kern... |
772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 |
} tls_device_resync_rx(tls_ctx, sk, seq, rcd_sn); } static void tls_device_core_ctrl_rx_resync(struct tls_context *tls_ctx, struct tls_offload_context_rx *ctx, struct sock *sk, struct sk_buff *skb) { struct strp_msg *rxm; /* device will request resyncs by itself based on stream scan */ if (ctx->resync_type != TLS_OFFLOAD_SYNC_TYPE_CORE_NEXT_HINT) return; /* already scheduled */ if (ctx->resync_nh_do_now) return; /* seen decrypted fragments since last fully-failed record */ if (ctx->resync_nh_reset) { ctx->resync_nh_reset = 0; ctx->resync_nh.decrypted_failed = 1; ctx->resync_nh.decrypted_tgt = TLS_DEVICE_RESYNC_NH_START_IVAL; return; } if (++ctx->resync_nh.decrypted_failed <= ctx->resync_nh.decrypted_tgt) return; /* doing resync, bump the next target in case it fails */ if (ctx->resync_nh.decrypted_tgt < TLS_DEVICE_RESYNC_NH_MAX_IVAL) ctx->resync_nh.decrypted_tgt *= 2; else ctx->resync_nh.decrypted_tgt += TLS_DEVICE_RESYNC_NH_MAX_IVAL; rxm = strp_msg(skb); /* head of next rec is already in, parser will sync for us */ if (tcp_inq(sk) > rxm->full_len) { |
8538d29ce net/tls: add trac... |
810 |
trace_tls_device_rx_resync_nh_schedule(sk); |
f953d33ba net/tls: add kern... |
811 812 813 814 815 816 817 818 819 820 821 |
ctx->resync_nh_do_now = 1; } else { struct tls_prot_info *prot = &tls_ctx->prot_info; u8 rcd_sn[TLS_MAX_REC_SEQ_SIZE]; memcpy(rcd_sn, tls_ctx->rx.rec_seq, prot->rec_seq_size); tls_bigint_increment(rcd_sn, prot->rec_seq_size); tls_device_resync_rx(tls_ctx, sk, tcp_sk(sk)->copied_seq, rcd_sn); } |
4799ac81e tls: Add rx inlin... |
822 823 824 825 826 |
} static int tls_device_reencrypt(struct sock *sk, struct sk_buff *skb) { struct strp_msg *rxm = strp_msg(skb); |
eb3d38d5a net/tls: fix copy... |
827 |
int err = 0, offset = rxm->offset, copy, nsg, data_len, pos; |
4799ac81e tls: Add rx inlin... |
828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 |
struct sk_buff *skb_iter, *unused; struct scatterlist sg[1]; char *orig_buf, *buf; orig_buf = kmalloc(rxm->full_len + TLS_HEADER_SIZE + TLS_CIPHER_AES_GCM_128_IV_SIZE, sk->sk_allocation); if (!orig_buf) return -ENOMEM; buf = orig_buf; nsg = skb_cow_data(skb, 0, &unused); if (unlikely(nsg < 0)) { err = nsg; goto free_buf; } sg_init_table(sg, 1); sg_set_buf(&sg[0], buf, rxm->full_len + TLS_HEADER_SIZE + TLS_CIPHER_AES_GCM_128_IV_SIZE); |
aeb11ff0d net/tls: check re... |
848 849 850 851 |
err = skb_copy_bits(skb, offset, buf, TLS_HEADER_SIZE + TLS_CIPHER_AES_GCM_128_IV_SIZE); if (err) goto free_buf; |
4799ac81e tls: Add rx inlin... |
852 853 854 855 856 857 858 |
/* We are interested only in the decrypted data not the auth */ err = decrypt_skb(sk, skb, sg); if (err != -EBADMSG) goto free_buf; else err = 0; |
eb3d38d5a net/tls: fix copy... |
859 |
data_len = rxm->full_len - TLS_CIPHER_AES_GCM_128_TAG_SIZE; |
4799ac81e tls: Add rx inlin... |
860 |
|
97e1caa51 net/tls: don't co... |
861 |
if (skb_pagelen(skb) > offset) { |
eb3d38d5a net/tls: fix copy... |
862 |
copy = min_t(int, skb_pagelen(skb) - offset, data_len); |
4799ac81e tls: Add rx inlin... |
863 |
|
aeb11ff0d net/tls: check re... |
864 865 866 867 868 |
if (skb->decrypted) { err = skb_store_bits(skb, offset, buf, copy); if (err) goto free_buf; } |
4799ac81e tls: Add rx inlin... |
869 |
|
97e1caa51 net/tls: don't co... |
870 871 872 |
offset += copy; buf += copy; } |
4799ac81e tls: Add rx inlin... |
873 |
|
eb3d38d5a net/tls: fix copy... |
874 |
pos = skb_pagelen(skb); |
4799ac81e tls: Add rx inlin... |
875 |
skb_walk_frags(skb, skb_iter) { |
eb3d38d5a net/tls: fix copy... |
876 877 878 879 880 881 882 883 884 885 886 887 888 889 |
int frag_pos; /* Practically all frags must belong to msg if reencrypt * is needed with current strparser and coalescing logic, * but strparser may "get optimized", so let's be safe. */ if (pos + skb_iter->len <= offset) goto done_with_frag; if (pos >= data_len + rxm->offset) break; frag_pos = offset - pos; copy = min_t(int, skb_iter->len - frag_pos, data_len + rxm->offset - offset); |
4799ac81e tls: Add rx inlin... |
890 |
|
aeb11ff0d net/tls: check re... |
891 892 893 894 895 |
if (skb_iter->decrypted) { err = skb_store_bits(skb_iter, frag_pos, buf, copy); if (err) goto free_buf; } |
4799ac81e tls: Add rx inlin... |
896 897 898 |
offset += copy; buf += copy; |
eb3d38d5a net/tls: fix copy... |
899 900 |
done_with_frag: pos += skb_iter->len; |
4799ac81e tls: Add rx inlin... |
901 902 903 904 905 906 |
} free_buf: kfree(orig_buf); return err; } |
4de30a8d5 net/tls: pass con... |
907 908 |
int tls_device_decrypted(struct sock *sk, struct tls_context *tls_ctx, struct sk_buff *skb, struct strp_msg *rxm) |
4799ac81e tls: Add rx inlin... |
909 |
{ |
4799ac81e tls: Add rx inlin... |
910 911 912 913 |
struct tls_offload_context_rx *ctx = tls_offload_ctx_rx(tls_ctx); int is_decrypted = skb->decrypted; int is_encrypted = !is_decrypted; struct sk_buff *skb_iter; |
4799ac81e tls: Add rx inlin... |
914 915 916 917 918 |
/* Check if all the data is decrypted already */ skb_walk_frags(skb, skb_iter) { is_decrypted &= skb_iter->decrypted; is_encrypted &= !skb_iter->decrypted; } |
9ec1c6ac2 net/tls: add devi... |
919 920 921 |
trace_tls_device_decrypted(sk, tcp_sk(sk)->copied_seq - rxm->full_len, tls_ctx->rx.rec_seq, rxm->full_len, is_encrypted, is_decrypted); |
4799ac81e tls: Add rx inlin... |
922 |
ctx->sw.decrypted |= is_decrypted; |
f953d33ba net/tls: add kern... |
923 |
/* Return immediately if the record is either entirely plaintext or |
4799ac81e tls: Add rx inlin... |
924 925 926 |
* entirely ciphertext. Otherwise handle reencrypt partially decrypted * record. */ |
f953d33ba net/tls: add kern... |
927 928 929 930 931 932 933 934 935 936 937 |
if (is_decrypted) { ctx->resync_nh_reset = 1; return 0; } if (is_encrypted) { tls_device_core_ctrl_rx_resync(tls_ctx, ctx, sk, skb); return 0; } ctx->resync_nh_reset = 1; return tls_device_reencrypt(sk, skb); |
4799ac81e tls: Add rx inlin... |
938 |
} |
9e9957973 net/tls: remove o... |
939 940 941 942 943 944 945 946 947 948 949 950 |
static void tls_device_attach(struct tls_context *ctx, struct sock *sk, struct net_device *netdev) { if (sk->sk_destruct != tls_device_sk_destruct) { refcount_set(&ctx->refcount, 1); dev_hold(netdev); ctx->netdev = netdev; spin_lock_irq(&tls_device_lock); list_add_tail(&ctx->list, &tls_device_list); spin_unlock_irq(&tls_device_lock); ctx->sk_destruct = sk->sk_destruct; |
8d5a49e9e net/tls: add help... |
951 |
smp_store_release(&sk->sk_destruct, tls_device_sk_destruct); |
9e9957973 net/tls: remove o... |
952 953 |
} } |
e8f697998 net/tls: Add gene... |
954 955 956 |
int tls_set_device_offload(struct sock *sk, struct tls_context *ctx) { u16 nonce_size, tag_size, iv_size, rec_seq_size; |
4509de146 net/tls: Move pro... |
957 958 |
struct tls_context *tls_ctx = tls_get_ctx(sk); struct tls_prot_info *prot = &tls_ctx->prot_info; |
e8f697998 net/tls: Add gene... |
959 |
struct tls_record_info *start_marker_record; |
d80a1b9d1 tls: Refactor tls... |
960 |
struct tls_offload_context_tx *offload_ctx; |
e8f697998 net/tls: Add gene... |
961 962 963 964 |
struct tls_crypto_info *crypto_info; struct net_device *netdev; char *iv, *rec_seq; struct sk_buff *skb; |
e8f697998 net/tls: Add gene... |
965 |
__be64 rcd_sn; |
90962b489 net/tls: don't ju... |
966 |
int rc; |
e8f697998 net/tls: Add gene... |
967 968 |
if (!ctx) |
90962b489 net/tls: don't ju... |
969 |
return -EINVAL; |
e8f697998 net/tls: Add gene... |
970 |
|
90962b489 net/tls: don't ju... |
971 972 |
if (ctx->priv_ctx_tx) return -EEXIST; |
e8f697998 net/tls: Add gene... |
973 974 |
start_marker_record = kmalloc(sizeof(*start_marker_record), GFP_KERNEL); |
90962b489 net/tls: don't ju... |
975 976 |
if (!start_marker_record) return -ENOMEM; |
e8f697998 net/tls: Add gene... |
977 |
|
d80a1b9d1 tls: Refactor tls... |
978 |
offload_ctx = kzalloc(TLS_OFFLOAD_CONTEXT_SIZE_TX, GFP_KERNEL); |
e8f697998 net/tls: Add gene... |
979 980 981 982 |
if (!offload_ctx) { rc = -ENOMEM; goto free_marker_record; } |
86029d10a tls: zero the cry... |
983 |
crypto_info = &ctx->crypto_send.info; |
618bac459 net/tls: reject o... |
984 985 986 987 |
if (crypto_info->version != TLS_1_2_VERSION) { rc = -EOPNOTSUPP; goto free_offload_ctx; } |
e8f697998 net/tls: Add gene... |
988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 |
switch (crypto_info->cipher_type) { case TLS_CIPHER_AES_GCM_128: nonce_size = TLS_CIPHER_AES_GCM_128_IV_SIZE; tag_size = TLS_CIPHER_AES_GCM_128_TAG_SIZE; iv_size = TLS_CIPHER_AES_GCM_128_IV_SIZE; iv = ((struct tls12_crypto_info_aes_gcm_128 *)crypto_info)->iv; rec_seq_size = TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE; rec_seq = ((struct tls12_crypto_info_aes_gcm_128 *)crypto_info)->rec_seq; break; default: rc = -EINVAL; goto free_offload_ctx; } |
89fec474f net/tls: pass rec... |
1002 1003 1004 1005 1006 |
/* Sanity-check the rec_seq_size for stack allocations */ if (rec_seq_size > TLS_MAX_REC_SEQ_SIZE) { rc = -EINVAL; goto free_offload_ctx; } |
ab232e61e net/tls: add miss... |
1007 1008 |
prot->version = crypto_info->version; prot->cipher_type = crypto_info->cipher_type; |
4509de146 net/tls: Move pro... |
1009 1010 1011 1012 |
prot->prepend_size = TLS_HEADER_SIZE + nonce_size; prot->tag_size = tag_size; prot->overhead_size = prot->prepend_size + prot->tag_size; prot->iv_size = iv_size; |
e8f697998 net/tls: Add gene... |
1013 1014 1015 1016 1017 1018 1019 1020 |
ctx->tx.iv = kmalloc(iv_size + TLS_CIPHER_AES_GCM_128_SALT_SIZE, GFP_KERNEL); if (!ctx->tx.iv) { rc = -ENOMEM; goto free_offload_ctx; } memcpy(ctx->tx.iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE, iv, iv_size); |
4509de146 net/tls: Move pro... |
1021 |
prot->rec_seq_size = rec_seq_size; |
969d50900 net/tls: Use kmem... |
1022 |
ctx->tx.rec_seq = kmemdup(rec_seq, rec_seq_size, GFP_KERNEL); |
e8f697998 net/tls: Add gene... |
1023 1024 1025 1026 |
if (!ctx->tx.rec_seq) { rc = -ENOMEM; goto free_iv; } |
e8f697998 net/tls: Add gene... |
1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 |
rc = tls_sw_fallback_init(sk, offload_ctx, crypto_info); if (rc) goto free_rec_seq; /* start at rec_seq - 1 to account for the start marker record */ memcpy(&rcd_sn, ctx->tx.rec_seq, sizeof(rcd_sn)); offload_ctx->unacked_record_sn = be64_to_cpu(rcd_sn) - 1; start_marker_record->end_seq = tcp_sk(sk)->write_seq; start_marker_record->len = 0; start_marker_record->num_frags = 0; INIT_LIST_HEAD(&offload_ctx->records_list); list_add_tail(&start_marker_record->list, &offload_ctx->records_list); spin_lock_init(&offload_ctx->lock); |
895262d85 tls: Fix tls_devi... |
1043 1044 |
sg_init_table(offload_ctx->sg_tx_data, ARRAY_SIZE(offload_ctx->sg_tx_data)); |
e8f697998 net/tls: Add gene... |
1045 1046 1047 |
clean_acked_data_enable(inet_csk(sk), &tls_icsk_clean_acked); ctx->push_pending_record = tls_device_push_pending_record; |
e8f697998 net/tls: Add gene... |
1048 1049 1050 1051 1052 1053 1054 1055 |
/* TLS offload is greatly simplified if we don't send * SKBs where only part of the payload needs to be encrypted. * So mark the last skb in the write queue as end of record. */ skb = tcp_write_queue_tail(sk); if (skb) TCP_SKB_CB(skb)->eor = 1; |
e8f697998 net/tls: Add gene... |
1056 1057 1058 1059 1060 |
netdev = get_netdev_for_sock(sk); if (!netdev) { pr_err_ratelimited("%s: netdev not found ", __func__); rc = -EINVAL; |
3544c98ac net/tls: narrow d... |
1061 |
goto disable_cad; |
e8f697998 net/tls: Add gene... |
1062 1063 1064 |
} if (!(netdev->features & NETIF_F_HW_TLS_TX)) { |
4a5cdc604 net/tls: Fix retu... |
1065 |
rc = -EOPNOTSUPP; |
e8f697998 net/tls: Add gene... |
1066 1067 1068 1069 1070 1071 |
goto release_netdev; } /* Avoid offloading if the device is down * We don't want to offload new flows after * the NETDEV_DOWN event |
3544c98ac net/tls: narrow d... |
1072 1073 1074 1075 |
* * device_offload_lock is taken in tls_devices's NETDEV_DOWN * handler thus protecting from the device going down before * ctx was added to tls_device_list. |
e8f697998 net/tls: Add gene... |
1076 |
*/ |
3544c98ac net/tls: narrow d... |
1077 |
down_read(&device_offload_lock); |
e8f697998 net/tls: Add gene... |
1078 1079 |
if (!(netdev->flags & IFF_UP)) { rc = -EINVAL; |
3544c98ac net/tls: narrow d... |
1080 |
goto release_lock; |
e8f697998 net/tls: Add gene... |
1081 1082 1083 1084 |
} ctx->priv_ctx_tx = offload_ctx; rc = netdev->tlsdev_ops->tls_dev_add(netdev, sk, TLS_OFFLOAD_CTX_DIR_TX, |
86029d10a tls: zero the cry... |
1085 |
&ctx->crypto_send.info, |
e8f697998 net/tls: Add gene... |
1086 |
tcp_sk(sk)->write_seq); |
8538d29ce net/tls: add trac... |
1087 1088 |
trace_tls_device_offload_set(sk, TLS_OFFLOAD_CTX_DIR_TX, tcp_sk(sk)->write_seq, rec_seq, rc); |
e8f697998 net/tls: Add gene... |
1089 |
if (rc) |
3544c98ac net/tls: narrow d... |
1090 |
goto release_lock; |
e8f697998 net/tls: Add gene... |
1091 |
|
4799ac81e tls: Add rx inlin... |
1092 |
tls_device_attach(ctx, sk, netdev); |
3544c98ac net/tls: narrow d... |
1093 |
up_read(&device_offload_lock); |
e8f697998 net/tls: Add gene... |
1094 |
|
e8f697998 net/tls: Add gene... |
1095 1096 1097 1098 |
/* following this assignment tls_is_sk_tx_device_offloaded * will return true and the context might be accessed * by the netdev's xmit function. */ |
4799ac81e tls: Add rx inlin... |
1099 1100 |
smp_store_release(&sk->sk_validate_xmit_skb, tls_validate_xmit_skb); dev_put(netdev); |
90962b489 net/tls: don't ju... |
1101 1102 |
return 0; |
e8f697998 net/tls: Add gene... |
1103 |
|
e8f697998 net/tls: Add gene... |
1104 1105 |
release_lock: up_read(&device_offload_lock); |
3544c98ac net/tls: narrow d... |
1106 1107 1108 |
release_netdev: dev_put(netdev); disable_cad: |
e8f697998 net/tls: Add gene... |
1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 |
clean_acked_data_disable(inet_csk(sk)); crypto_free_aead(offload_ctx->aead_send); free_rec_seq: kfree(ctx->tx.rec_seq); free_iv: kfree(ctx->tx.iv); free_offload_ctx: kfree(offload_ctx); ctx->priv_ctx_tx = NULL; free_marker_record: kfree(start_marker_record); |
e8f697998 net/tls: Add gene... |
1120 1121 |
return rc; } |
4799ac81e tls: Add rx inlin... |
1122 1123 |
int tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx) { |
8538d29ce net/tls: add trac... |
1124 |
struct tls12_crypto_info_aes_gcm_128 *info; |
4799ac81e tls: Add rx inlin... |
1125 1126 1127 |
struct tls_offload_context_rx *context; struct net_device *netdev; int rc = 0; |
618bac459 net/tls: reject o... |
1128 1129 |
if (ctx->crypto_recv.info.version != TLS_1_2_VERSION) return -EOPNOTSUPP; |
4799ac81e tls: Add rx inlin... |
1130 1131 1132 1133 |
netdev = get_netdev_for_sock(sk); if (!netdev) { pr_err_ratelimited("%s: netdev not found ", __func__); |
3544c98ac net/tls: narrow d... |
1134 |
return -EINVAL; |
4799ac81e tls: Add rx inlin... |
1135 1136 1137 |
} if (!(netdev->features & NETIF_F_HW_TLS_RX)) { |
4a5cdc604 net/tls: Fix retu... |
1138 |
rc = -EOPNOTSUPP; |
4799ac81e tls: Add rx inlin... |
1139 1140 1141 1142 1143 1144 |
goto release_netdev; } /* Avoid offloading if the device is down * We don't want to offload new flows after * the NETDEV_DOWN event |
3544c98ac net/tls: narrow d... |
1145 1146 1147 1148 |
* * device_offload_lock is taken in tls_devices's NETDEV_DOWN * handler thus protecting from the device going down before * ctx was added to tls_device_list. |
4799ac81e tls: Add rx inlin... |
1149 |
*/ |
3544c98ac net/tls: narrow d... |
1150 |
down_read(&device_offload_lock); |
4799ac81e tls: Add rx inlin... |
1151 1152 |
if (!(netdev->flags & IFF_UP)) { rc = -EINVAL; |
3544c98ac net/tls: narrow d... |
1153 |
goto release_lock; |
4799ac81e tls: Add rx inlin... |
1154 1155 1156 1157 1158 |
} context = kzalloc(TLS_OFFLOAD_CONTEXT_SIZE_RX, GFP_KERNEL); if (!context) { rc = -ENOMEM; |
3544c98ac net/tls: narrow d... |
1159 |
goto release_lock; |
4799ac81e tls: Add rx inlin... |
1160 |
} |
f953d33ba net/tls: add kern... |
1161 |
context->resync_nh_reset = 1; |
4799ac81e tls: Add rx inlin... |
1162 1163 1164 1165 1166 1167 1168 |
ctx->priv_ctx_rx = context; rc = tls_set_sw_offload(sk, ctx, 0); if (rc) goto release_ctx; rc = netdev->tlsdev_ops->tls_dev_add(netdev, sk, TLS_OFFLOAD_CTX_DIR_RX, |
86029d10a tls: zero the cry... |
1169 |
&ctx->crypto_recv.info, |
4799ac81e tls: Add rx inlin... |
1170 |
tcp_sk(sk)->copied_seq); |
8538d29ce net/tls: add trac... |
1171 1172 1173 |
info = (void *)&ctx->crypto_recv.info; trace_tls_device_offload_set(sk, TLS_OFFLOAD_CTX_DIR_RX, tcp_sk(sk)->copied_seq, info->rec_seq, rc); |
e49d268db net/tls: don't lo... |
1174 |
if (rc) |
4799ac81e tls: Add rx inlin... |
1175 |
goto free_sw_resources; |
4799ac81e tls: Add rx inlin... |
1176 1177 |
tls_device_attach(ctx, sk, netdev); |
90962b489 net/tls: don't ju... |
1178 1179 1180 1181 1182 |
up_read(&device_offload_lock); dev_put(netdev); return 0; |
4799ac81e tls: Add rx inlin... |
1183 1184 |
free_sw_resources: |
62ef81d56 net/tls: avoid po... |
1185 |
up_read(&device_offload_lock); |
4799ac81e tls: Add rx inlin... |
1186 |
tls_sw_free_resources_rx(sk); |
62ef81d56 net/tls: avoid po... |
1187 |
down_read(&device_offload_lock); |
4799ac81e tls: Add rx inlin... |
1188 1189 |
release_ctx: ctx->priv_ctx_rx = NULL; |
4799ac81e tls: Add rx inlin... |
1190 1191 |
release_lock: up_read(&device_offload_lock); |
3544c98ac net/tls: narrow d... |
1192 1193 |
release_netdev: dev_put(netdev); |
4799ac81e tls: Add rx inlin... |
1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 |
return rc; } void tls_device_offload_cleanup_rx(struct sock *sk) { struct tls_context *tls_ctx = tls_get_ctx(sk); struct net_device *netdev; down_read(&device_offload_lock); netdev = tls_ctx->netdev; if (!netdev) goto out; |
4799ac81e tls: Add rx inlin... |
1206 1207 1208 1209 1210 1211 |
netdev->tlsdev_ops->tls_dev_del(netdev, tls_ctx, TLS_OFFLOAD_CTX_DIR_RX); if (tls_ctx->tx_conf != TLS_HW) { dev_put(netdev); tls_ctx->netdev = NULL; |
025cc2fb6 net/tls: Protect ... |
1212 1213 |
} else { set_bit(TLS_RX_DEV_CLOSED, &tls_ctx->flags); |
4799ac81e tls: Add rx inlin... |
1214 1215 1216 |
} out: up_read(&device_offload_lock); |
4799ac81e tls: Add rx inlin... |
1217 1218 |
tls_sw_release_resources_rx(sk); } |
e8f697998 net/tls: Add gene... |
1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 |
static int tls_device_down(struct net_device *netdev) { struct tls_context *ctx, *tmp; unsigned long flags; LIST_HEAD(list); /* Request a write lock to block new offload attempts */ down_write(&device_offload_lock); spin_lock_irqsave(&tls_device_lock, flags); list_for_each_entry_safe(ctx, tmp, &tls_device_list, list) { if (ctx->netdev != netdev || !refcount_inc_not_zero(&ctx->refcount)) continue; list_move(&ctx->list, &list); } spin_unlock_irqrestore(&tls_device_lock, flags); list_for_each_entry_safe(ctx, tmp, &list, list) { |
4799ac81e tls: Add rx inlin... |
1239 1240 1241 |
if (ctx->tx_conf == TLS_HW) netdev->tlsdev_ops->tls_dev_del(netdev, ctx, TLS_OFFLOAD_CTX_DIR_TX); |
025cc2fb6 net/tls: Protect ... |
1242 1243 |
if (ctx->rx_conf == TLS_HW && !test_bit(TLS_RX_DEV_CLOSED, &ctx->flags)) |
4799ac81e tls: Add rx inlin... |
1244 1245 |
netdev->tlsdev_ops->tls_dev_del(netdev, ctx, TLS_OFFLOAD_CTX_DIR_RX); |
e52972c11 net/tls: replace ... |
1246 1247 1248 1249 |
WRITE_ONCE(ctx->netdev, NULL); smp_mb__before_atomic(); /* pairs with test_and_set_bit() */ while (test_bit(TLS_RX_SYNC_RUNNING, &ctx->flags)) usleep_range(10, 200); |
e8f697998 net/tls: Add gene... |
1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 |
dev_put(netdev); list_del_init(&ctx->list); if (refcount_dec_and_test(&ctx->refcount)) tls_device_free_ctx(ctx); } up_write(&device_offload_lock); flush_work(&tls_device_gc_work); return NOTIFY_DONE; } static int tls_dev_event(struct notifier_block *this, unsigned long event, void *ptr) { struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
c3f4a6c39 net/tls: don't ig... |
1268 1269 |
if (!dev->tlsdev_ops && !(dev->features & (NETIF_F_HW_TLS_RX | NETIF_F_HW_TLS_TX))) |
e8f697998 net/tls: Add gene... |
1270 1271 1272 1273 1274 |
return NOTIFY_DONE; switch (event) { case NETDEV_REGISTER: case NETDEV_FEAT_CHANGE: |
4799ac81e tls: Add rx inlin... |
1275 |
if ((dev->features & NETIF_F_HW_TLS_RX) && |
eeb2efaf3 net/tls: generali... |
1276 |
!dev->tlsdev_ops->tls_dev_resync) |
4799ac81e tls: Add rx inlin... |
1277 |
return NOTIFY_BAD; |
e8f697998 net/tls: Add gene... |
1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 |
if (dev->tlsdev_ops && dev->tlsdev_ops->tls_dev_add && dev->tlsdev_ops->tls_dev_del) return NOTIFY_DONE; else return NOTIFY_BAD; case NETDEV_DOWN: return tls_device_down(dev); } return NOTIFY_DONE; } static struct notifier_block tls_dev_notifier = { .notifier_call = tls_dev_event, }; void __init tls_device_init(void) { register_netdevice_notifier(&tls_dev_notifier); } void __exit tls_device_cleanup(void) { unregister_netdevice_notifier(&tls_dev_notifier); flush_work(&tls_device_gc_work); |
494bc1d28 net/tcp: use defe... |
1303 |
clean_acked_data_flush(); |
e8f697998 net/tls: Add gene... |
1304 |
} |