falloc.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _FALLOC_H_
 3#define _FALLOC_H_
 4
 5#include <uapi/linux/falloc.h>
 6
 7
 8/*
 9 * Space reservation ioctls and argument structure
10 * are designed to be compatible with the legacy XFS ioctls.
11 */
12struct space_resv {
13	__s16		l_type;
14	__s16		l_whence;
15	__s64		l_start;
16	__s64		l_len;		/* len == 0 means until end of file */
17	__s32		l_sysid;
18	__u32		l_pid;
19	__s32		l_pad[4];	/* reserved area */
20};
21
22#define FS_IOC_RESVSP		_IOW('X', 40, struct space_resv)
23#define FS_IOC_UNRESVSP		_IOW('X', 41, struct space_resv)
24#define FS_IOC_RESVSP64		_IOW('X', 42, struct space_resv)
25#define FS_IOC_UNRESVSP64	_IOW('X', 43, struct space_resv)
26#define FS_IOC_ZERO_RANGE	_IOW('X', 57, struct space_resv)
27
28/*
29 * Mask of all supported fallocate modes.  Only one can be set at a time.
30 *
31 * In addition to the mode bit, the mode argument can also encode flags.
32 * FALLOC_FL_KEEP_SIZE is the only supported flag so far.
33 */
34#define FALLOC_FL_MODE_MASK	(FALLOC_FL_ALLOCATE_RANGE |	\
35				 FALLOC_FL_PUNCH_HOLE |		\
36				 FALLOC_FL_COLLAPSE_RANGE |	\
37				 FALLOC_FL_ZERO_RANGE |		\
38				 FALLOC_FL_INSERT_RANGE |	\
39				 FALLOC_FL_UNSHARE_RANGE |	\
40				 FALLOC_FL_WRITE_ZEROES)
41
42/* on ia32 l_start is on a 32-bit boundary */
43#if defined(CONFIG_X86_64)
44struct space_resv_32 {
45	__s16		l_type;
46	__s16		l_whence;
47	__s64		l_start	__attribute__((packed));
48			/* len == 0 means until end of file */
49	__s64		l_len __attribute__((packed));
50	__s32		l_sysid;
51	__u32		l_pid;
52	__s32		l_pad[4];	/* reserve area */
53};
54
55#define FS_IOC_RESVSP_32	_IOW ('X', 40, struct space_resv_32)
56#define FS_IOC_UNRESVSP_32	_IOW ('X', 41, struct space_resv_32)
57#define FS_IOC_RESVSP64_32	_IOW ('X', 42, struct space_resv_32)
58#define FS_IOC_UNRESVSP64_32	_IOW ('X', 43, struct space_resv_32)
59#define FS_IOC_ZERO_RANGE_32	_IOW ('X', 57, struct space_resv_32)
60
61#endif
62
63#endif /* _FALLOC_H_ */