92652b1243
Prepare indenting for the following commit. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20171012095319.136610-9-vsementsov@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
133 lines
3.7 KiB
C
133 lines
3.7 KiB
C
/*
|
|
* NBD Internal Declarations
|
|
*
|
|
* Copyright (C) 2016 Red Hat, Inc.
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2 or later.
|
|
* See the COPYING file in the top-level directory.
|
|
*/
|
|
|
|
#ifndef NBD_INTERNAL_H
|
|
#define NBD_INTERNAL_H
|
|
#include "block/nbd.h"
|
|
#include "sysemu/block-backend.h"
|
|
#include "io/channel-tls.h"
|
|
|
|
#include "qemu/coroutine.h"
|
|
#include "qemu/iov.h"
|
|
|
|
#ifndef _WIN32
|
|
#include <sys/ioctl.h>
|
|
#endif
|
|
#if defined(__sun__) || defined(__HAIKU__)
|
|
#include <sys/ioccom.h>
|
|
#endif
|
|
|
|
#ifdef __linux__
|
|
#include <linux/fs.h>
|
|
#endif
|
|
|
|
#include "qemu/bswap.h"
|
|
#include "qemu/queue.h"
|
|
#include "qemu/main-loop.h"
|
|
|
|
/* This is all part of the "official" NBD API.
|
|
*
|
|
* The most up-to-date documentation is available at:
|
|
* https://github.com/yoe/nbd/blob/master/doc/proto.md
|
|
*/
|
|
|
|
/* Size of all NBD_OPT_*, without payload */
|
|
#define NBD_REQUEST_SIZE (4 + 2 + 2 + 8 + 8 + 4)
|
|
/* Size of all NBD_REP_* sent in answer to most NBD_OPT_*, without payload */
|
|
#define NBD_REPLY_SIZE (4 + 4 + 8)
|
|
/* Size of reply to NBD_OPT_EXPORT_NAME */
|
|
#define NBD_REPLY_EXPORT_NAME_SIZE (8 + 2 + 124)
|
|
/* Size of oldstyle negotiation */
|
|
#define NBD_OLDSTYLE_NEGOTIATE_SIZE (8 + 8 + 8 + 4 + 124)
|
|
|
|
#define NBD_REQUEST_MAGIC 0x25609513
|
|
#define NBD_SIMPLE_REPLY_MAGIC 0x67446698
|
|
#define NBD_OPTS_MAGIC 0x49484156454F5054LL
|
|
#define NBD_CLIENT_MAGIC 0x0000420281861253LL
|
|
#define NBD_REP_MAGIC 0x0003e889045565a9LL
|
|
|
|
#define NBD_SET_SOCK _IO(0xab, 0)
|
|
#define NBD_SET_BLKSIZE _IO(0xab, 1)
|
|
#define NBD_SET_SIZE _IO(0xab, 2)
|
|
#define NBD_DO_IT _IO(0xab, 3)
|
|
#define NBD_CLEAR_SOCK _IO(0xab, 4)
|
|
#define NBD_CLEAR_QUE _IO(0xab, 5)
|
|
#define NBD_PRINT_DEBUG _IO(0xab, 6)
|
|
#define NBD_SET_SIZE_BLOCKS _IO(0xab, 7)
|
|
#define NBD_DISCONNECT _IO(0xab, 8)
|
|
#define NBD_SET_TIMEOUT _IO(0xab, 9)
|
|
#define NBD_SET_FLAGS _IO(0xab, 10)
|
|
|
|
/* NBD errors are based on errno numbers, so there is a 1:1 mapping,
|
|
* but only a limited set of errno values is specified in the protocol.
|
|
* Everything else is squashed to EINVAL.
|
|
*/
|
|
#define NBD_SUCCESS 0
|
|
#define NBD_EPERM 1
|
|
#define NBD_EIO 5
|
|
#define NBD_ENOMEM 12
|
|
#define NBD_EINVAL 22
|
|
#define NBD_ENOSPC 28
|
|
#define NBD_ESHUTDOWN 108
|
|
|
|
/* nbd_read_eof
|
|
* Tries to read @size bytes from @ioc.
|
|
* Returns 1 on success
|
|
* 0 on eof, when no data was read (errp is not set)
|
|
* negative errno on failure (errp is set)
|
|
*/
|
|
static inline int nbd_read_eof(QIOChannel *ioc, void *buffer, size_t size,
|
|
Error **errp)
|
|
{
|
|
int ret;
|
|
|
|
assert(size);
|
|
ret = qio_channel_read_all_eof(ioc, buffer, size, errp);
|
|
if (ret < 0) {
|
|
ret = -EIO;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/* nbd_read
|
|
* Reads @size bytes from @ioc. Returns 0 on success.
|
|
*/
|
|
static inline int nbd_read(QIOChannel *ioc, void *buffer, size_t size,
|
|
Error **errp)
|
|
{
|
|
return qio_channel_read_all(ioc, buffer, size, errp) < 0 ? -EIO : 0;
|
|
}
|
|
|
|
/* nbd_write
|
|
* Writes @size bytes to @ioc. Returns 0 on success.
|
|
*/
|
|
static inline int nbd_write(QIOChannel *ioc, const void *buffer, size_t size,
|
|
Error **errp)
|
|
{
|
|
return qio_channel_write_all(ioc, buffer, size, errp) < 0 ? -EIO : 0;
|
|
}
|
|
|
|
struct NBDTLSHandshakeData {
|
|
GMainLoop *loop;
|
|
bool complete;
|
|
Error *error;
|
|
};
|
|
|
|
|
|
void nbd_tls_handshake(QIOTask *task,
|
|
void *opaque);
|
|
const char *nbd_opt_lookup(uint32_t opt);
|
|
const char *nbd_rep_lookup(uint32_t rep);
|
|
const char *nbd_info_lookup(uint16_t info);
|
|
const char *nbd_cmd_lookup(uint16_t info);
|
|
|
|
int nbd_drop(QIOChannel *ioc, size_t size, Error **errp);
|
|
|
|
#endif
|