xref: /openbmc/linux/include/uapi/linux/ext4.h (revision 519fe1ba)
1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 
3 #ifndef _UAPI_LINUX_EXT4_H
4 #define _UAPI_LINUX_EXT4_H
5 #include <linux/fiemap.h>
6 #include <linux/fs.h>
7 #include <linux/ioctl.h>
8 #include <linux/types.h>
9 
10 /*
11  * ext4-specific ioctl commands
12  */
13 #define	EXT4_IOC_GETVERSION		_IOR('f', 3, long)
14 #define	EXT4_IOC_SETVERSION		_IOW('f', 4, long)
15 #define	EXT4_IOC_GETVERSION_OLD		FS_IOC_GETVERSION
16 #define	EXT4_IOC_SETVERSION_OLD		FS_IOC_SETVERSION
17 #define EXT4_IOC_GETRSVSZ		_IOR('f', 5, long)
18 #define EXT4_IOC_SETRSVSZ		_IOW('f', 6, long)
19 #define EXT4_IOC_GROUP_EXTEND		_IOW('f', 7, unsigned long)
20 #define EXT4_IOC_GROUP_ADD		_IOW('f', 8, struct ext4_new_group_input)
21 #define EXT4_IOC_MIGRATE		_IO('f', 9)
22  /* note ioctl 10 reserved for an early version of the FIEMAP ioctl */
23  /* note ioctl 11 reserved for filesystem-independent FIEMAP ioctl */
24 #define EXT4_IOC_ALLOC_DA_BLKS		_IO('f', 12)
25 #define EXT4_IOC_MOVE_EXT		_IOWR('f', 15, struct move_extent)
26 #define EXT4_IOC_RESIZE_FS		_IOW('f', 16, __u64)
27 #define EXT4_IOC_SWAP_BOOT		_IO('f', 17)
28 #define EXT4_IOC_PRECACHE_EXTENTS	_IO('f', 18)
29 /* ioctl codes 19--39 are reserved for fscrypt */
30 #define EXT4_IOC_CLEAR_ES_CACHE		_IO('f', 40)
31 #define EXT4_IOC_GETSTATE		_IOW('f', 41, __u32)
32 #define EXT4_IOC_GET_ES_CACHE		_IOWR('f', 42, struct fiemap)
33 #define EXT4_IOC_CHECKPOINT		_IOW('f', 43, __u32)
34 #define EXT4_IOC_GETFSUUID		_IOR('f', 44, struct fsuuid)
35 #define EXT4_IOC_SETFSUUID		_IOW('f', 44, struct fsuuid)
36 
37 #define EXT4_IOC_SHUTDOWN _IOR('X', 125, __u32)
38 
39 /*
40  * ioctl commands in 32 bit emulation
41  */
42 #define EXT4_IOC32_GETVERSION		_IOR('f', 3, int)
43 #define EXT4_IOC32_SETVERSION		_IOW('f', 4, int)
44 #define EXT4_IOC32_GETRSVSZ		_IOR('f', 5, int)
45 #define EXT4_IOC32_SETRSVSZ		_IOW('f', 6, int)
46 #define EXT4_IOC32_GROUP_EXTEND		_IOW('f', 7, unsigned int)
47 #define EXT4_IOC32_GROUP_ADD		_IOW('f', 8, struct compat_ext4_new_group_input)
48 #define EXT4_IOC32_GETVERSION_OLD	FS_IOC32_GETVERSION
49 #define EXT4_IOC32_SETVERSION_OLD	FS_IOC32_SETVERSION
50 
51 /*
52  * Flags returned by EXT4_IOC_GETSTATE
53  *
54  * We only expose to userspace a subset of the state flags in
55  * i_state_flags
56  */
57 #define EXT4_STATE_FLAG_EXT_PRECACHED	0x00000001
58 #define EXT4_STATE_FLAG_NEW		0x00000002
59 #define EXT4_STATE_FLAG_NEWENTRY	0x00000004
60 #define EXT4_STATE_FLAG_DA_ALLOC_CLOSE	0x00000008
61 
62 /*
63  * Flags for ioctl EXT4_IOC_CHECKPOINT
64  */
65 #define EXT4_IOC_CHECKPOINT_FLAG_DISCARD	0x1
66 #define EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT	0x2
67 #define EXT4_IOC_CHECKPOINT_FLAG_DRY_RUN	0x4
68 #define EXT4_IOC_CHECKPOINT_FLAG_VALID		(EXT4_IOC_CHECKPOINT_FLAG_DISCARD | \
69 						EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT | \
70 						EXT4_IOC_CHECKPOINT_FLAG_DRY_RUN)
71 
72 /*
73  * Structure for EXT4_IOC_GETFSUUID/EXT4_IOC_SETFSUUID
74  */
75 struct fsuuid {
76 	__u32       fsu_len;
77 	__u32       fsu_flags;
78 	__u8        fsu_uuid[];
79 };
80 
81 /*
82  * Structure for EXT4_IOC_MOVE_EXT
83  */
84 struct move_extent {
85 	__u32 reserved;		/* should be zero */
86 	__u32 donor_fd;		/* donor file descriptor */
87 	__u64 orig_start;	/* logical start offset in block for orig */
88 	__u64 donor_start;	/* logical start offset in block for donor */
89 	__u64 len;		/* block length to be moved */
90 	__u64 moved_len;	/* moved block length */
91 };
92 
93 /*
94  * Flags used by EXT4_IOC_SHUTDOWN
95  */
96 #define EXT4_GOING_FLAGS_DEFAULT		0x0	/* going down */
97 #define EXT4_GOING_FLAGS_LOGFLUSH		0x1	/* flush log but not data */
98 #define EXT4_GOING_FLAGS_NOLOGFLUSH		0x2	/* don't flush log nor data */
99 
100 /* Used to pass group descriptor data when online resize is done */
101 struct ext4_new_group_input {
102 	__u32 group;		/* Group number for this data */
103 	__u64 block_bitmap;	/* Absolute block number of block bitmap */
104 	__u64 inode_bitmap;	/* Absolute block number of inode bitmap */
105 	__u64 inode_table;	/* Absolute block number of inode table start */
106 	__u32 blocks_count;	/* Total number of blocks in this group */
107 	__u16 reserved_blocks;	/* Number of reserved blocks in this group */
108 	__u16 unused;
109 };
110 
111 /*
112  * Returned by EXT4_IOC_GET_ES_CACHE as an additional possible flag.
113  * It indicates that the entry in extent status cache is for a hole.
114  */
115 #define EXT4_FIEMAP_EXTENT_HOLE		0x08000000
116 
117 #endif /* _UAPI_LINUX_EXT4_H */
118