87 lines
2.5 KiB
C
87 lines
2.5 KiB
C
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/*
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* NBD Internal Declarations
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*
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* Copyright (C) 2016 Red Hat, Inc.
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#ifndef NBD_INTERNAL_H
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#define NBD_INTERNAL_H
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#include "block/nbd.h"
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#include "sysemu/block-backend.h"
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#include "io/channel-tls.h"
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#include "qemu/coroutine.h"
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#include "qemu/iov.h"
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#ifndef _WIN32
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#include <sys/ioctl.h>
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#endif
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#ifdef HAVE_SYS_IOCCOM_H
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#include <sys/ioccom.h>
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#endif
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#ifdef __linux__
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#include <linux/fs.h>
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#endif
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#include "qemu/bswap.h"
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/* This is all part of the "official" NBD API.
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*
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* The most up-to-date documentation is available at:
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* https://github.com/yoe/nbd/blob/master/doc/proto.md
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*/
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/* Size of all NBD_OPT_*, without payload */
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#define NBD_REQUEST_SIZE (4 + 2 + 2 + 8 + 8 + 4)
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/* Size of all NBD_REP_* sent in answer to most NBD_OPT_*, without payload */
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#define NBD_REPLY_SIZE (4 + 4 + 8)
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/* Size of reply to NBD_OPT_EXPORT_NAME */
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#define NBD_REPLY_EXPORT_NAME_SIZE (8 + 2 + 124)
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/* Size of oldstyle negotiation */
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#define NBD_OLDSTYLE_NEGOTIATE_SIZE (8 + 8 + 8 + 4 + 124)
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#define NBD_INIT_MAGIC 0x4e42444d41474943LL /* ASCII "NBDMAGIC" */
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#define NBD_REQUEST_MAGIC 0x25609513
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#define NBD_OPTS_MAGIC 0x49484156454F5054LL /* ASCII "IHAVEOPT" */
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#define NBD_CLIENT_MAGIC 0x0000420281861253LL
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#define NBD_REP_MAGIC 0x0003e889045565a9LL
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#define NBD_SET_SOCK _IO(0xab, 0)
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#define NBD_SET_BLKSIZE _IO(0xab, 1)
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#define NBD_SET_SIZE _IO(0xab, 2)
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#define NBD_DO_IT _IO(0xab, 3)
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#define NBD_CLEAR_SOCK _IO(0xab, 4)
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#define NBD_CLEAR_QUE _IO(0xab, 5)
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#define NBD_PRINT_DEBUG _IO(0xab, 6)
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#define NBD_SET_SIZE_BLOCKS _IO(0xab, 7)
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#define NBD_DISCONNECT _IO(0xab, 8)
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#define NBD_SET_TIMEOUT _IO(0xab, 9)
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#define NBD_SET_FLAGS _IO(0xab, 10)
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/* nbd_write
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* Writes @size bytes to @ioc. Returns 0 on success.
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*/
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static inline int nbd_write(QIOChannel *ioc, const void *buffer, size_t size,
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Error **errp)
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{
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return qio_channel_write_all(ioc, buffer, size, errp) < 0 ? -EIO : 0;
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}
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struct NBDTLSHandshakeData {
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GMainLoop *loop;
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bool complete;
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Error *error;
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};
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void nbd_tls_handshake(QIOTask *task,
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void *opaque);
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int nbd_drop(QIOChannel *ioc, size_t size, Error **errp);
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#endif
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