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  */
12 struct 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 
41 /* on ia32 l_start is on a 32-bit boundary */
42 #if defined(CONFIG_X86_64)
43 struct space_resv_32 {
44 	__s16		l_type;
45 	__s16		l_whence;
46 	__s64		l_start	__attribute__((packed));
47 			/* len == 0 means until end of file */
48 	__s64		l_len __attribute__((packed));
49 	__s32		l_sysid;
50 	__u32		l_pid;
51 	__s32		l_pad[4];	/* reserve area */
52 };
53 
54 #define FS_IOC_RESVSP_32	_IOW ('X', 40, struct space_resv_32)
55 #define FS_IOC_UNRESVSP_32	_IOW ('X', 41, struct space_resv_32)
56 #define FS_IOC_RESVSP64_32	_IOW ('X', 42, struct space_resv_32)
57 #define FS_IOC_UNRESVSP64_32	_IOW ('X', 43, struct space_resv_32)
58 #define FS_IOC_ZERO_RANGE_32	_IOW ('X', 57, struct space_resv_32)
59 
60 #endif
61 
62 #endif /* _FALLOC_H_ */
63