1 | /* |
2 | * NBD Internal Declarations |
3 | * |
4 | * Copyright (C) 2016 Red Hat, Inc. |
5 | * |
6 | * This work is licensed under the terms of the GNU GPL, version 2 or later. |
7 | * See the COPYING file in the top-level directory. |
8 | */ |
9 | |
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 | |
32 | /* This is all part of the "official" NBD API. |
33 | * |
34 | * The most up-to-date documentation is available at: |
35 | * https://github.com/yoe/nbd/blob/master/doc/proto.md |
36 | */ |
37 | |
38 | /* Size of all NBD_OPT_*, without payload */ |
39 | #define NBD_REQUEST_SIZE (4 + 2 + 2 + 8 + 8 + 4) |
40 | /* Size of all NBD_REP_* sent in answer to most NBD_OPT_*, without payload */ |
41 | #define NBD_REPLY_SIZE (4 + 4 + 8) |
42 | /* Size of reply to NBD_OPT_EXPORT_NAME */ |
43 | #define NBD_REPLY_EXPORT_NAME_SIZE (8 + 2 + 124) |
44 | /* Size of oldstyle negotiation */ |
45 | #define NBD_OLDSTYLE_NEGOTIATE_SIZE (8 + 8 + 8 + 4 + 124) |
46 | |
47 | #define NBD_INIT_MAGIC 0x4e42444d41474943LL /* ASCII "NBDMAGIC" */ |
48 | #define NBD_REQUEST_MAGIC 0x25609513 |
49 | #define NBD_OPTS_MAGIC 0x49484156454F5054LL /* ASCII "IHAVEOPT" */ |
50 | #define NBD_CLIENT_MAGIC 0x0000420281861253LL |
51 | #define NBD_REP_MAGIC 0x0003e889045565a9LL |
52 | |
53 | #define NBD_SET_SOCK _IO(0xab, 0) |
54 | #define NBD_SET_BLKSIZE _IO(0xab, 1) |
55 | #define NBD_SET_SIZE _IO(0xab, 2) |
56 | #define NBD_DO_IT _IO(0xab, 3) |
57 | #define NBD_CLEAR_SOCK _IO(0xab, 4) |
58 | #define NBD_CLEAR_QUE _IO(0xab, 5) |
59 | #define NBD_PRINT_DEBUG _IO(0xab, 6) |
60 | #define NBD_SET_SIZE_BLOCKS _IO(0xab, 7) |
61 | #define NBD_DISCONNECT _IO(0xab, 8) |
62 | #define NBD_SET_TIMEOUT _IO(0xab, 9) |
63 | #define NBD_SET_FLAGS _IO(0xab, 10) |
64 | |
65 | /* nbd_write |
66 | * Writes @size bytes to @ioc. Returns 0 on success. |
67 | */ |
68 | static inline int nbd_write(QIOChannel *ioc, const void *buffer, size_t size, |
69 | Error **errp) |
70 | { |
71 | return qio_channel_write_all(ioc, buffer, size, errp) < 0 ? -EIO : 0; |
72 | } |
73 | |
74 | struct NBDTLSHandshakeData { |
75 | GMainLoop *loop; |
76 | bool complete; |
77 | Error *error; |
78 | }; |
79 | |
80 | |
81 | void nbd_tls_handshake(QIOTask *task, |
82 | void *opaque); |
83 | |
84 | int nbd_drop(QIOChannel *ioc, size_t size, Error **errp); |
85 | |
86 | #endif |
87 | |