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10#ifndef NBD_INTERNAL_H
11#define NBD_INTERNAL_H
12#include "block/nbd.h"
13#include "sysemu/block-backend.h"
14#include "io/channel-tls.h"
15
16#include "qemu/coroutine.h"
17#include "qemu/iov.h"
18
19#ifndef _WIN32
20#include <sys/ioctl.h>
21#endif
22#if defined(__sun__) || defined(__HAIKU__)
23#include <sys/ioccom.h>
24#endif
25
26#ifdef __linux__
27#include <linux/fs.h>
28#endif
29
30#include "qemu/bswap.h"
31#include "qemu/queue.h"
32#include "qemu/main-loop.h"
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40
41#define NBD_REQUEST_SIZE (4 + 2 + 2 + 8 + 8 + 4)
42
43#define NBD_REPLY_SIZE (4 + 4 + 8)
44
45#define NBD_REPLY_EXPORT_NAME_SIZE (8 + 2 + 124)
46
47#define NBD_OLDSTYLE_NEGOTIATE_SIZE (8 + 8 + 8 + 4 + 124)
48
49#define NBD_REQUEST_MAGIC 0x25609513
50#define NBD_OPTS_MAGIC 0x49484156454F5054LL
51#define NBD_CLIENT_MAGIC 0x0000420281861253LL
52#define NBD_REP_MAGIC 0x0003e889045565a9LL
53
54#define NBD_SET_SOCK _IO(0xab, 0)
55#define NBD_SET_BLKSIZE _IO(0xab, 1)
56#define NBD_SET_SIZE _IO(0xab, 2)
57#define NBD_DO_IT _IO(0xab, 3)
58#define NBD_CLEAR_SOCK _IO(0xab, 4)
59#define NBD_CLEAR_QUE _IO(0xab, 5)
60#define NBD_PRINT_DEBUG _IO(0xab, 6)
61#define NBD_SET_SIZE_BLOCKS _IO(0xab, 7)
62#define NBD_DISCONNECT _IO(0xab, 8)
63#define NBD_SET_TIMEOUT _IO(0xab, 9)
64#define NBD_SET_FLAGS _IO(0xab, 10)
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71
72static inline int nbd_read_eof(QIOChannel *ioc, void *buffer, size_t size,
73 Error **errp)
74{
75 int ret;
76
77 assert(size);
78 ret = qio_channel_read_all_eof(ioc, buffer, size, errp);
79 if (ret < 0) {
80 ret = -EIO;
81 }
82 return ret;
83}
84
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86
87
88static inline int nbd_write(QIOChannel *ioc, const void *buffer, size_t size,
89 Error **errp)
90{
91 return qio_channel_write_all(ioc, buffer, size, errp) < 0 ? -EIO : 0;
92}
93
94struct NBDTLSHandshakeData {
95 GMainLoop *loop;
96 bool complete;
97 Error *error;
98};
99
100
101void nbd_tls_handshake(QIOTask *task,
102 void *opaque);
103const char *nbd_opt_lookup(uint32_t opt);
104const char *nbd_rep_lookup(uint32_t rep);
105const char *nbd_info_lookup(uint16_t info);
106const char *nbd_cmd_lookup(uint16_t info);
107const char *nbd_err_lookup(int err);
108
109int nbd_drop(QIOChannel *ioc, size_t size, Error **errp);
110
111#endif
112