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/*********************************************************
* Copyright (C) 2006-2008 VMware, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation version 2.1 and no later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the Lesser GNU General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
*********************************************************/
/*
* vmblock.h --
*
* User-level interface to the vmblock device.
*
* VMBLOCK_DEVICE should be opened with VMBLOCK_DEVICE_MODE mode. Then
* VMBLOCK_CONTROL should be called to perform blocking operations.
* The links which can be blocked are in the directory VMBLOCK_MOUNT_POINT.
*
* VMBLOCK_CONTROL takes the file descriptor of the VMBLOCK_DEVICE, an
* operation, and the path of the target of the file being operated on (if
* applicable).
*
* The operation should be one of:
* VMBLOCK_ADD_FILEBLOCK
* VMBLOCK_DEL_FILEBLOCK
* VMBLOCK_LIST_FILEBLOCKS
*
* path should be something in /tmp/VMwareDnD/ rather than in
* VMBLOCK_MOUNT_POINT.
*
* VMBLOCK_CONTROL returns 0 on success or returns -1 and sets errno on
* failure.
*/
#ifndef _VMBLOCK_H_
#define _VMBLOCK_H_
#if defined(sun) || defined(__FreeBSD__)
# include <sys/ioccom.h>
#endif
#if defined(__FreeBSD__)
# include <sys/param.h>
#endif
/*
* FUSE definitions. They are supposed to be used by userspace code and
* therefore not guarded by ARCH defines since FUSE can potentially
* be used on different operating systems.
*/
#define VMBLOCK_FUSE_ADD_FILEBLOCK 'a'
#define VMBLOCK_FUSE_DEL_FILEBLOCK 'd'
#ifdef VMX86_DEVEL
# define VMBLOCK_FUSE_LIST_FILEBLOCKS 'l'
#endif /* VMX86_DEVEL */
/*
* If you try 'read'-ing from file descriptor vmblock-fuse is supposed
* to respond with the following. It is used to check whether we deal
* with FUSE or in-kernel implementation.
*/
#define VMBLOCK_FUSE_READ_RESPONSE "I am VMBLOCK-FUSE"
#define VMBLOCK_FUSE_FS_NAME "fuse.vmware-vmblock"
#define VMBLOCK_FUSE_MOUNT_POINT "/tmp/vmblock-fuse"
#define VMBLOCK_FUSE_CTRL_MNTPNT "blockdir"
#define VMBLOCK_FUSE_FS_ROOT VMBLOCK_FUSE_MOUNT_POINT "/" VMBLOCK_FUSE_CTRL_MNTPNT
#define VMBLOCK_FUSE_DEVICE_NAME "dev"
#define VMBLOCK_FUSE_DEVICE VMBLOCK_FUSE_MOUNT_POINT "/" VMBLOCK_FUSE_DEVICE_NAME
#define VMBLOCK_FUSE_DEVICE_MODE O_RDWR
/* Commands for the control half of vmblock driver */
#if defined(vmblock_fuse)
/* These definitions are for vmblock-fuse module itself */
# include <unistd.h>
# include <limits.h>
# include <string.h>
# include <errno.h>
# include "vm_basic_types.h"
# define VMBLOCK_ADD_FILEBLOCK VMBLOCK_FUSE_ADD_FILEBLOCK
# define VMBLOCK_DEL_FILEBLOCK VMBLOCK_FUSE_DEL_FILEBLOCK
# ifdef VMX86_DEVEL
# define VMBLOCK_LIST_FILEBLOCKS VMBLOCK_FUSE_LIST_FILEBLOCKS
# endif /* VMX86_DEVEL */
/*
* Some of the following names don't actually make much sense on their own.
* They're used for consistency with the other ports. See the file header for
* explanations of what they're used for.
*/
# define VMBLOCK_FS_NAME VMBLOCK_FUSE_FS_NAME
# define VMBLOCK_DEVICE_NAME VMBLOCK_FUSE_DEVICE_NAME
# define VMBLOCK_CONTROL_MOUNTPOINT VMBLOCK_FUSE_CTRL_MNTPNT
# define VMBLOCK_DEVICE VMBLOCK_FUSE_DEVICE
# define VMBLOCK_DEVICE_MODE VMBLOCK_FUSE_DEVICE_MODE
# define VMBLOCK_MOUNT_POINT VMBLOCK_FUSE_MOUNT_POINT
#elif defined(linux)
# define VMBLOCK_ADD_FILEBLOCK 98
# define VMBLOCK_DEL_FILEBLOCK 99
# ifdef VMX86_DEVEL
# define VMBLOCK_LIST_FILEBLOCKS 100
# endif
# define VMBLOCK_FS_NAME "vmblock"
# define VMBLOCK_CONTROL_DIRNAME VMBLOCK_FS_NAME
# define VMBLOCK_CONTROL_DEVNAME "dev"
# define VMBLOCK_CONTROL_MOUNTPOINT "mountPoint"
# define VMBLOCK_CONTROL_PROC_DIRNAME "fs/" VMBLOCK_CONTROL_DIRNAME
# define VMBLOCK_MOUNT_POINT "/proc/" VMBLOCK_CONTROL_PROC_DIRNAME \
"/" VMBLOCK_CONTROL_MOUNTPOINT
# define VMBLOCK_FS_ROOT VMBLOCK_MOUNT_POINT
# define VMBLOCK_DEVICE "/proc/" VMBLOCK_CONTROL_PROC_DIRNAME \
"/" VMBLOCK_CONTROL_DEVNAME
# define VMBLOCK_DEVICE_MODE O_WRONLY
#elif defined(sun) || defined(__FreeBSD__)
# define VMBLOCK_FS_NAME "vmblock"
# define VMBLOCK_MOUNT_POINT "/var/run/" VMBLOCK_FS_NAME
# define VMBLOCK_FS_ROOT VMBLOCK_MOUNT_POINT
# define VMBLOCK_DEVICE VMBLOCK_MOUNT_POINT
# define VMBLOCK_DEVICE_MODE O_RDONLY
# if defined(sun) /* if (sun) { */
/*
* Construct ioctl(2) commands for blocks. _IO() is a helper macro to
* construct unique command values more easily. I chose 'v' because I
* didn't see it being used elsewhere, and the command numbers begin at one.
*/
# define VMBLOCK_ADD_FILEBLOCK _IO('v', 1)
# define VMBLOCK_DEL_FILEBLOCK _IO('v', 2)
# ifdef VMX86_DEVEL
# define VMBLOCK_LIST_FILEBLOCKS _IO('v', 3)
# endif
# elif defined(__FreeBSD__) /* } else if (FreeBSD) { */
/*
* Similar to Solaris, construct ioctl(2) commands for block operations.
* Since the FreeBSD implementation does not change the user's passed-in
* data (pathname), we use the _IOW macro to define commands which write
* to the kernel. (As opposed to _IOR or _IOWR.) Groups 'v' and 'V'
* are taken by terminal drivers, so I opted for group 'Z'.
*/
# define VMBLOCK_ADD_FILEBLOCK _IOW('Z', 1, char[MAXPATHLEN] )
# define VMBLOCK_DEL_FILEBLOCK _IOW('Z', 2, char[MAXPATHLEN] )
# ifdef VMX86_DEVEL
# define VMBLOCK_LIST_FILEBLOCKS _IO('Z', 3)
# define VMBLOCK_PURGE_FILEBLOCKS _IO('Z', 4)
# endif
# endif /* } */
#else
# error "Unknown platform for vmblock."
#endif
#endif /* _VMBLOCK_H_ */
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