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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2
3#ifndef _LINUX_EXT4_H
4#define _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 */
75struct fsuuid {
76 __u32 fsu_len;
77 __u32 fsu_flags;
78 __u8 fsu_uuid[];
79};
80
81/*
82 * Structure for EXT4_IOC_MOVE_EXT
83 */
84struct 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 */
101struct 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 /* _LINUX_EXT4_H */