1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
/*
* Copyright 2022 Virtual Open Systems SAS.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef VIRTIO_RNG
#define VIRTIO_RNG
#include "virtio_loopback.h"
extern const char test_str[64];
typedef void RngBackend;
typedef struct VirtIORNGConf {
RngBackend *rng;
uint64_t max_bytes;
uint32_t period_ms;
} VirtIORNGConf;
typedef struct VirtIORNG {
VirtIODevice *parent_obj;
/* Only one vq - guest puts buffer(s) on it when it needs entropy */
VirtQueue *vq;
VirtIORNGConf conf;
RngBackend *rng;
/* We purposefully don't migrate this state. The quota will reset on the
* destination as a result. Rate limiting is host state, not guest state.
*/
int64_t quota_remaining;
bool activate_timer;
} VirtIORNG;
bool is_guest_ready(VirtIORNG *vrng);
size_t get_request_size(VirtQueue *vq, unsigned quota);
void virtio_rng_set_status(VirtIODevice *vdev, uint8_t status);
void virtio_rng_process(VirtIORNG *vrng);
void chr_read(VirtIORNG *vrng, const void *buf, size_t size);
void virtio_rng_realize(void);
void virtio_rng_init(VirtIODevice *vdev);
#endif /* VIRTIO_RNG */
|
