mirror of
https://github.com/xen-project/xen.git
synced 2026-10-28 18:21:39 +01:00
Paul Durrant
b49ef5d39d
Versions of linux privcmd prior to commit dc9eab6fd94d ("return -ENOTTY
for unimplemented IOCTLs") will return -EINVAL rather than the conventional
-ENOTTY for unimplemented codes. This breaks the error path in
libxenforeignmemory resource mapping, which only translates ENOTTY into
EOPNOTSUPP to inform callers of the need to use an alternative (legacy)
mechanism.
This patch adds a new 'unimplemented' [1] ioctl code into the local
privcmd header which is then used to probe for the appropriate errno to
translate in the resource mapping error path
[1] this is a code that has, so far, never been used in any version of
privcmd and will be added to future versions of the header in the
linux source, to make sure it stays unimplemented.
Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
121 lines
3.8 KiB
C
121 lines
3.8 KiB
C
/******************************************************************************
|
|
* privcmd.h
|
|
*
|
|
* Interface to /dev/xen/privcmd.
|
|
*
|
|
* Copyright (c) 2003-2005, K A Fraser
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License version 2
|
|
* as published by the Free Software Foundation; or, when distributed
|
|
* separately from the Linux kernel or incorporated into other
|
|
* software packages, subject to the following license:
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this source file (the "Software"), to deal in the Software without
|
|
* restriction, including without limitation the rights to use, copy, modify,
|
|
* merge, publish, distribute, sublicense, and/or sell copies of the Software,
|
|
* and to permit persons to whom the Software is furnished to do so, subject to
|
|
* the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
* IN THE SOFTWARE.
|
|
*/
|
|
|
|
#ifndef __LINUX_PUBLIC_PRIVCMD_H__
|
|
#define __LINUX_PUBLIC_PRIVCMD_H__
|
|
|
|
#include <linux/types.h>
|
|
|
|
#ifndef __user
|
|
#define __user
|
|
#endif
|
|
|
|
typedef struct privcmd_hypercall
|
|
{
|
|
__u64 op;
|
|
__u64 arg[5];
|
|
} privcmd_hypercall_t;
|
|
|
|
typedef struct privcmd_mmap_entry {
|
|
__u64 va;
|
|
__u64 mfn;
|
|
__u64 npages;
|
|
} privcmd_mmap_entry_t;
|
|
|
|
typedef struct privcmd_mmap {
|
|
int num;
|
|
domid_t dom; /* target domain */
|
|
privcmd_mmap_entry_t __user *entry;
|
|
} privcmd_mmap_t;
|
|
|
|
typedef struct privcmd_mmapbatch {
|
|
int num; /* number of pages to populate */
|
|
domid_t dom; /* target domain */
|
|
__u64 addr; /* virtual address */
|
|
xen_pfn_t __user *arr; /* array of mfns - top nibble set on err */
|
|
} privcmd_mmapbatch_t;
|
|
|
|
#define PRIVCMD_MMAPBATCH_MFN_ERROR 0xf0000000U
|
|
#define PRIVCMD_MMAPBATCH_PAGED_ERROR 0x80000000U
|
|
|
|
typedef struct privcmd_mmapbatch_v2 {
|
|
unsigned int num; /* number of pages to populate */
|
|
domid_t dom; /* target domain */
|
|
__u64 addr; /* virtual address */
|
|
const xen_pfn_t __user *arr; /* array of mfns */
|
|
int __user *err; /* array of error codes */
|
|
} privcmd_mmapbatch_v2_t;
|
|
|
|
typedef struct privcmd_dm_op_buf {
|
|
void __user *uptr;
|
|
size_t size;
|
|
} privcmd_dm_op_buf_t;
|
|
|
|
typedef struct privcmd_dm_op {
|
|
domid_t dom;
|
|
__u16 num;
|
|
const privcmd_dm_op_buf_t __user *ubufs;
|
|
} privcmd_dm_op_t;
|
|
|
|
typedef struct privcmd_mmap_resource {
|
|
domid_t dom;
|
|
__u32 type;
|
|
__u32 id;
|
|
__u32 idx;
|
|
__u64 num;
|
|
__u64 addr;
|
|
} privcmd_mmap_resource_t;
|
|
|
|
/*
|
|
* @cmd: IOCTL_PRIVCMD_HYPERCALL
|
|
* @arg: &privcmd_hypercall_t
|
|
* Return: Value returned from execution of the specified hypercall.
|
|
*/
|
|
#define IOCTL_PRIVCMD_HYPERCALL \
|
|
_IOC(_IOC_NONE, 'P', 0, sizeof(privcmd_hypercall_t))
|
|
#define IOCTL_PRIVCMD_MMAP \
|
|
_IOC(_IOC_NONE, 'P', 2, sizeof(privcmd_mmap_t))
|
|
#define IOCTL_PRIVCMD_MMAPBATCH \
|
|
_IOC(_IOC_NONE, 'P', 3, sizeof(privcmd_mmapbatch_t))
|
|
#define IOCTL_PRIVCMD_MMAPBATCH_V2 \
|
|
_IOC(_IOC_NONE, 'P', 4, sizeof(privcmd_mmapbatch_v2_t))
|
|
#define IOCTL_PRIVCMD_DM_OP \
|
|
_IOC(_IOC_NONE, 'P', 5, sizeof(privcmd_dm_op_t))
|
|
#define IOCTL_PRIVCMD_RESTRICT \
|
|
_IOC(_IOC_NONE, 'P', 6, sizeof(domid_t))
|
|
#define IOCTL_PRIVCMD_MMAP_RESOURCE \
|
|
_IOC(_IOC_NONE, 'P', 7, sizeof(privcmd_mmap_resource_t))
|
|
#define IOCTL_PRIVCMD_UNIMPLEMENTED \
|
|
_IOC(_IOC_NONE, 'P', 0xFF, 0)
|
|
|
|
#endif /* __LINUX_PUBLIC_PRIVCMD_H__ */
|