cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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cachefiles.h (1650B)

      1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
      2#ifndef _LINUX_CACHEFILES_H
      3#define _LINUX_CACHEFILES_H
      4
      5#include <linux/types.h>
      6#include <linux/ioctl.h>
      7
      8/*
      9 * Fscache ensures that the maximum length of cookie key is 255. The volume key
     10 * is controlled by netfs, and generally no bigger than 255.
     11 */
     12#define CACHEFILES_MSG_MAX_SIZE	1024
     13
     14enum cachefiles_opcode {
     15	CACHEFILES_OP_OPEN,
     16	CACHEFILES_OP_CLOSE,
     17	CACHEFILES_OP_READ,
     18};
     19
     20/*
     21 * Message Header
     22 *
     23 * @msg_id	a unique ID identifying this message
     24 * @opcode	message type, CACHEFILE_OP_*
     25 * @len		message length, including message header and following data
     26 * @object_id	a unique ID identifying a cache file
     27 * @data	message type specific payload
     28 */
     29struct cachefiles_msg {
     30	__u32 msg_id;
     31	__u32 opcode;
     32	__u32 len;
     33	__u32 object_id;
     34	__u8  data[];
     35};
     36
     37/*
     38 * @data contains the volume_key followed directly by the cookie_key. volume_key
     39 * is a NUL-terminated string; @volume_key_size indicates the size of the volume
     40 * key in bytes. cookie_key is binary data, which is netfs specific;
     41 * @cookie_key_size indicates the size of the cookie key in bytes.
     42 *
     43 * @fd identifies an anon_fd referring to the cache file.
     44 */
     45struct cachefiles_open {
     46	__u32 volume_key_size;
     47	__u32 cookie_key_size;
     48	__u32 fd;
     49	__u32 flags;
     50	__u8  data[];
     51};
     52
     53/*
     54 * @off		indicates the starting offset of the requested file range
     55 * @len		indicates the length of the requested file range
     56 */
     57struct cachefiles_read {
     58	__u64 off;
     59	__u64 len;
     60};
     61
     62/*
     63 * Reply for READ request
     64 * @arg for this ioctl is the @id field of READ request.
     65 */
     66#define CACHEFILES_IOC_READ_COMPLETE	_IOW(0x98, 1, int)
     67
     68#endif