Fam Zheng | 798bfe0 | 2016-01-14 16:41:02 +0800 | [diff] [blame] | 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" |
Daniel P. Berrange | f95910f | 2016-02-10 18:41:11 +0000 | [diff] [blame] | 14 | #include "io/channel-tls.h" |
Fam Zheng | 798bfe0 | 2016-01-14 16:41:02 +0800 | [diff] [blame] | 15 | |
| 16 | #include "qemu/coroutine.h" |
Daniel P. Berrange | 1c778ef | 2016-02-10 18:41:04 +0000 | [diff] [blame] | 17 | #include "qemu/iov.h" |
Fam Zheng | 798bfe0 | 2016-01-14 16:41:02 +0800 | [diff] [blame] | 18 | |
Fam Zheng | 798bfe0 | 2016-01-14 16:41:02 +0800 | [diff] [blame] | 19 | #ifndef _WIN32 |
| 20 | #include <sys/ioctl.h> |
| 21 | #endif |
Thomas Huth | ded5d78 | 2020-11-14 11:10:11 +0100 | [diff] [blame] | 22 | #ifdef HAVE_SYS_IOCCOM_H |
Fam Zheng | 798bfe0 | 2016-01-14 16:41:02 +0800 | [diff] [blame] | 23 | #include <sys/ioccom.h> |
| 24 | #endif |
Fam Zheng | 798bfe0 | 2016-01-14 16:41:02 +0800 | [diff] [blame] | 25 | |
| 26 | #ifdef __linux__ |
| 27 | #include <linux/fs.h> |
| 28 | #endif |
| 29 | |
Paolo Bonzini | 58369e2 | 2016-03-15 17:22:36 +0100 | [diff] [blame] | 30 | #include "qemu/bswap.h" |
Fam Zheng | 798bfe0 | 2016-01-14 16:41:02 +0800 | [diff] [blame] | 31 | |
Fam Zheng | 798bfe0 | 2016-01-14 16:41:02 +0800 | [diff] [blame] | 32 | /* This is all part of the "official" NBD API. |
| 33 | * |
| 34 | * The most up-to-date documentation is available at: |
Eric Blake | b626b51 | 2016-10-14 13:33:04 -0500 | [diff] [blame] | 35 | * https://github.com/yoe/nbd/blob/master/doc/proto.md |
Fam Zheng | 798bfe0 | 2016-01-14 16:41:02 +0800 | [diff] [blame] | 36 | */ |
| 37 | |
Eric Blake | 8ecaeae | 2017-07-07 15:30:47 -0500 | [diff] [blame] | 38 | /* Size of all NBD_OPT_*, without payload */ |
Eric Blake | 5f66d06 | 2017-07-17 14:26:35 -0500 | [diff] [blame] | 39 | #define NBD_REQUEST_SIZE (4 + 2 + 2 + 8 + 8 + 4) |
Eric Blake | 8ecaeae | 2017-07-07 15:30:47 -0500 | [diff] [blame] | 40 | /* Size of all NBD_REP_* sent in answer to most NBD_OPT_*, without payload */ |
Eric Blake | 5f66d06 | 2017-07-17 14:26:35 -0500 | [diff] [blame] | 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) |
Eric Blake | 8ecaeae | 2017-07-07 15:30:47 -0500 | [diff] [blame] | 46 | |
Eric Blake | ef2e35f | 2018-12-15 07:53:10 -0600 | [diff] [blame] | 47 | #define NBD_INIT_MAGIC 0x4e42444d41474943LL /* ASCII "NBDMAGIC" */ |
Vladimir Sementsov-Ogievskiy | 92652b1 | 2017-10-12 12:53:14 +0300 | [diff] [blame] | 48 | #define NBD_REQUEST_MAGIC 0x25609513 |
Eric Blake | ef2e35f | 2018-12-15 07:53:10 -0600 | [diff] [blame] | 49 | #define NBD_OPTS_MAGIC 0x49484156454F5054LL /* ASCII "IHAVEOPT" */ |
Vladimir Sementsov-Ogievskiy | 92652b1 | 2017-10-12 12:53:14 +0300 | [diff] [blame] | 50 | #define NBD_CLIENT_MAGIC 0x0000420281861253LL |
| 51 | #define NBD_REP_MAGIC 0x0003e889045565a9LL |
Fam Zheng | 798bfe0 | 2016-01-14 16:41:02 +0800 | [diff] [blame] | 52 | |
Vladimir Sementsov-Ogievskiy | 92652b1 | 2017-10-12 12:53:14 +0300 | [diff] [blame] | 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) |
Fam Zheng | 798bfe0 | 2016-01-14 16:41:02 +0800 | [diff] [blame] | 64 | |
Vladimir Sementsov-Ogievskiy | d1fdf25 | 2017-06-02 18:01:39 +0300 | [diff] [blame] | 65 | /* nbd_write |
Vladimir Sementsov-Ogievskiy | f5d406f | 2017-05-16 12:45:30 +0300 | [diff] [blame] | 66 | * Writes @size bytes to @ioc. Returns 0 on success. |
| 67 | */ |
Vladimir Sementsov-Ogievskiy | d1fdf25 | 2017-06-02 18:01:39 +0300 | [diff] [blame] | 68 | static inline int nbd_write(QIOChannel *ioc, const void *buffer, size_t size, |
| 69 | Error **errp) |
Fam Zheng | 798bfe0 | 2016-01-14 16:41:02 +0800 | [diff] [blame] | 70 | { |
Eric Blake | 030fa7f | 2017-09-05 14:11:14 -0500 | [diff] [blame] | 71 | return qio_channel_write_all(ioc, buffer, size, errp) < 0 ? -EIO : 0; |
Fam Zheng | 798bfe0 | 2016-01-14 16:41:02 +0800 | [diff] [blame] | 72 | } |
| 73 | |
Daniel P. Berrange | f95910f | 2016-02-10 18:41:11 +0000 | [diff] [blame] | 74 | struct NBDTLSHandshakeData { |
| 75 | GMainLoop *loop; |
| 76 | bool complete; |
| 77 | Error *error; |
| 78 | }; |
| 79 | |
| 80 | |
Daniel P. Berrange | 60e705c | 2016-08-11 15:20:58 +0100 | [diff] [blame] | 81 | void nbd_tls_handshake(QIOTask *task, |
Daniel P. Berrange | f95910f | 2016-02-10 18:41:11 +0000 | [diff] [blame] | 82 | void *opaque); |
| 83 | |
Vladimir Sementsov-Ogievskiy | 4429802 | 2017-06-02 18:01:40 +0300 | [diff] [blame] | 84 | int nbd_drop(QIOChannel *ioc, size_t size, Error **errp); |
| 85 | |
Fam Zheng | 798bfe0 | 2016-01-14 16:41:02 +0800 | [diff] [blame] | 86 | #endif |