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11fdf7f2 TL |
1 | /* |
2 | * This file is open source software, licensed to you under the terms | |
3 | * of the Apache License, Version 2.0 (the "License"). See the NOTICE file | |
4 | * distributed with this work for additional information regarding copyright | |
5 | * ownership. You may not use this file except in compliance with the License. | |
6 | * | |
7 | * You may obtain a copy of the License at | |
8 | * | |
9 | * http://www.apache.org/licenses/LICENSE-2.0 | |
10 | * | |
11 | * Unless required by applicable law or agreed to in writing, | |
12 | * software distributed under the License is distributed on an | |
13 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | |
14 | * KIND, either express or implied. See the License for the | |
15 | * specific language governing permissions and limitations | |
16 | * under the License. | |
17 | */ | |
11fdf7f2 TL |
18 | #include <seastar/net/proxy.hh> |
19 | #include <utility> | |
20 | ||
21 | namespace seastar { | |
22 | ||
23 | namespace net { | |
24 | ||
25 | class proxy_net_device : public qp { | |
26 | private: | |
27 | static constexpr size_t _send_queue_length = 128; | |
28 | size_t _send_depth = 0; | |
29 | unsigned _cpu; | |
30 | device* _dev; | |
31 | std::vector<packet> _moving; | |
32 | public: | |
33 | explicit proxy_net_device(unsigned cpu, device* dev); | |
34 | virtual future<> send(packet p) override { | |
35 | abort(); | |
36 | } | |
37 | virtual uint32_t send(circular_buffer<packet>& p) override; | |
38 | }; | |
39 | ||
40 | proxy_net_device::proxy_net_device(unsigned cpu, device* dev) : | |
41 | _cpu(cpu), | |
42 | _dev(dev) | |
43 | { | |
44 | _moving.reserve(_send_queue_length); | |
45 | } | |
46 | ||
47 | uint32_t proxy_net_device::send(circular_buffer<packet>& p) | |
48 | { | |
49 | if (!_moving.empty() || _send_depth == _send_queue_length) { | |
50 | return 0; | |
51 | } | |
52 | ||
1e59de90 | 53 | for (; !p.empty() && _send_depth < _send_queue_length; _send_depth++) { |
11fdf7f2 TL |
54 | _moving.push_back(std::move(p.front())); |
55 | p.pop_front(); | |
56 | } | |
57 | ||
58 | if (!_moving.empty()) { | |
59 | qp* dev = &_dev->queue_for_cpu(_cpu); | |
f67539c2 | 60 | auto cpu = this_shard_id(); |
9f95a23c TL |
61 | // FIXME: future is discarded |
62 | (void)smp::submit_to(_cpu, [this, dev, cpu]() mutable { | |
11fdf7f2 TL |
63 | for(size_t i = 0; i < _moving.size(); i++) { |
64 | dev->proxy_send(_moving[i].free_on_cpu(cpu, [this] { _send_depth--; })); | |
65 | } | |
66 | }).then([this] { | |
67 | _moving.clear(); | |
68 | }); | |
69 | } | |
70 | ||
71 | return _moving.size(); | |
72 | } | |
73 | ||
74 | std::unique_ptr<qp> create_proxy_net_device(unsigned master_cpu, device* dev) { | |
75 | return std::make_unique<proxy_net_device>(master_cpu, dev); | |
76 | } | |
77 | } | |
78 | ||
79 | } |