/usr/share/doc/aufs-tools/examples/uloop/include/linux/uloop.h is in aufs-tools 1:4.9+20170918-1ubuntu1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 | /*
* aufs sample -- ULOOP driver
*
* Copyright (C) 2005-2010 Junjiro Okajima
*
* This program, aufs is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any 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
* GNU General Public License for more details.
*
* You should have received a copy of the GNU 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
*/
#ifndef __ULOOP_H__
#define __ULOOP_H__
#include <linux/ioctl.h>
#include <linux/loop.h>
//#include <linux/unistd.h>
#ifndef __KERNEL__
#include <sys/types.h>
#endif
#define ULOOP_NAME "uloop"
#define ULOOP_VERSION "20071126"
/* loop filter variation */
#define LOOP_FILTER_ULOOP (MAX_LO_CRYPT - 1)
/* ioctl */
#ifndef LOOP_CHANGE_FD
#define LOOP_CHANGE_FD 0x4C06
#endif
enum {UloCtlErr, UloCtlErr_Last};
enum {
/* LOOP_CHANGE_FD is the last number in loop ioctl */
UloCtl_Begin = (LOOP_CHANGE_FD & 0x0ff),
UloCtl_SETBMP,
UloCtl_READY,
UloCtl_RCVREQ,
UloCtl_SNDRES
};
struct ulo_ctl_setbmp {
int fd;
int pagesize;
};
struct ulo_ctl_ready {
int signum;
struct pid *pid; /* the driver sets it automatically */
};
struct ulo_ctl_rcvreq {
unsigned long long start;
int size;
};
struct ulo_ctl_sndres {
unsigned long long start;
int size;
};
union ulo_ctl {
struct ulo_ctl_setbmp setbmp;
struct ulo_ctl_ready ready;
struct ulo_ctl_rcvreq rcvreq;
struct ulo_ctl_sndres sndres;
};
#define ULOCTL_Type 'L'
#define ULOCTL_SETBMP _IOW(ULOCTL_Type, UloCtl_SETBMP, union ulo_ctl)
#define ULOCTL_READY _IOR(ULOCTL_Type, UloCtl_READY, union ulo_ctl)
#define ULOCTL_RCVREQ _IOR(ULOCTL_Type, UloCtl_RCVREQ, union ulo_ctl)
#define ULOCTL_SNDRES _IOW(ULOCTL_Type, UloCtl_SNDRES, union ulo_ctl)
/* ---------------------------------------------------------------------- */
/* user library API */
#ifndef __KERNEL__
enum {ULO_DEV, ULO_CACHE, ULO_BITMAP, ULO_Last};
struct uloop {
int fd[ULO_Last];
int pagesize;
unsigned long long tgt_size, cache_size;
};
extern const struct uloop *uloop;
#define ulo_dev_fd ({ uloop->fd[ULO_DEV]; })
#define ulo_cache_fd ({ uloop->fd[ULO_CACHE]; })
#define ulo_bitmap_fd ({ uloop->fd[ULO_BITMAP]; })
struct ulo_init {
char *path[ULO_Last];
int dev_flags;
unsigned long long size;
};
int ulo_init(struct ulo_init *init);
typedef int (*ulo_cb_t)(unsigned long long start, int size, void *arg);
int ulo_loop(int sig, ulo_cb_t store, void *arg);
#endif
#endif /* __ULOOP_H__ */
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