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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#define EXT4_IOC_GET_TUNE_SB_PARAM _IOR('f', 45, struct ext4_tune_sb_params)
37#define EXT4_IOC_SET_TUNE_SB_PARAM _IOW('f', 46, struct ext4_tune_sb_params)
38
39#define EXT4_IOC_SHUTDOWN _IOR('X', 125, __u32)
40
41/*
42 * ioctl commands in 32 bit emulation
43 */
44#define EXT4_IOC32_GETVERSION _IOR('f', 3, int)
45#define EXT4_IOC32_SETVERSION _IOW('f', 4, int)
46#define EXT4_IOC32_GETRSVSZ _IOR('f', 5, int)
47#define EXT4_IOC32_SETRSVSZ _IOW('f', 6, int)
48#define EXT4_IOC32_GROUP_EXTEND _IOW('f', 7, unsigned int)
49#define EXT4_IOC32_GROUP_ADD _IOW('f', 8, struct compat_ext4_new_group_input)
50#define EXT4_IOC32_GETVERSION_OLD FS_IOC32_GETVERSION
51#define EXT4_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION
52
53/*
54 * Flags returned by EXT4_IOC_GETSTATE
55 *
56 * We only expose to userspace a subset of the state flags in
57 * i_state_flags
58 */
59#define EXT4_STATE_FLAG_EXT_PRECACHED 0x00000001
60#define EXT4_STATE_FLAG_NEW 0x00000002
61#define EXT4_STATE_FLAG_NEWENTRY 0x00000004
62#define EXT4_STATE_FLAG_DA_ALLOC_CLOSE 0x00000008
63
64/*
65 * Flags for ioctl EXT4_IOC_CHECKPOINT
66 */
67#define EXT4_IOC_CHECKPOINT_FLAG_DISCARD 0x1
68#define EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT 0x2
69#define EXT4_IOC_CHECKPOINT_FLAG_DRY_RUN 0x4
70#define EXT4_IOC_CHECKPOINT_FLAG_VALID (EXT4_IOC_CHECKPOINT_FLAG_DISCARD | \
71 EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT | \
72 EXT4_IOC_CHECKPOINT_FLAG_DRY_RUN)
73
74/*
75 * Structure for EXT4_IOC_GETFSUUID/EXT4_IOC_SETFSUUID
76 */
77struct fsuuid {
78 __u32 fsu_len;
79 __u32 fsu_flags;
80 __u8 fsu_uuid[];
81};
82
83/*
84 * Structure for EXT4_IOC_MOVE_EXT
85 */
86struct move_extent {
87 __u32 reserved; /* should be zero */
88 __u32 donor_fd; /* donor file descriptor */
89 __u64 orig_start; /* logical start offset in block for orig */
90 __u64 donor_start; /* logical start offset in block for donor */
91 __u64 len; /* block length to be moved */
92 __u64 moved_len; /* moved block length */
93};
94
95/*
96 * Flags used by EXT4_IOC_SHUTDOWN
97 */
98#define EXT4_GOING_FLAGS_DEFAULT 0x0 /* going down */
99#define EXT4_GOING_FLAGS_LOGFLUSH 0x1 /* flush log but not data */
100#define EXT4_GOING_FLAGS_NOLOGFLUSH 0x2 /* don't flush log nor data */
101
102/* Used to pass group descriptor data when online resize is done */
103struct ext4_new_group_input {
104 __u32 group; /* Group number for this data */
105 __u64 block_bitmap; /* Absolute block number of block bitmap */
106 __u64 inode_bitmap; /* Absolute block number of inode bitmap */
107 __u64 inode_table; /* Absolute block number of inode table start */
108 __u32 blocks_count; /* Total number of blocks in this group */
109 __u16 reserved_blocks; /* Number of reserved blocks in this group */
110 __u16 unused;
111};
112
113struct ext4_tune_sb_params {
114 __u32 set_flags;
115 __u32 checkinterval;
116 __u16 errors_behavior;
117 __u16 mnt_count;
118 __u16 max_mnt_count;
119 __u16 raid_stride;
120 __u64 last_check_time;
121 __u64 reserved_blocks;
122 __u64 blocks_count;
123 __u32 default_mnt_opts;
124 __u32 reserved_uid;
125 __u32 reserved_gid;
126 __u32 raid_stripe_width;
127 __u16 encoding;
128 __u16 encoding_flags;
129 __u8 def_hash_alg;
130 __u8 pad_1;
131 __u16 pad_2;
132 __u32 feature_compat;
133 __u32 feature_incompat;
134 __u32 feature_ro_compat;
135 __u32 set_feature_compat_mask;
136 __u32 set_feature_incompat_mask;
137 __u32 set_feature_ro_compat_mask;
138 __u32 clear_feature_compat_mask;
139 __u32 clear_feature_incompat_mask;
140 __u32 clear_feature_ro_compat_mask;
141 __u8 mount_opts[64];
142 __u8 pad[68];
143};
144
145#define EXT4_TUNE_FL_ERRORS_BEHAVIOR 0x00000001
146#define EXT4_TUNE_FL_MNT_COUNT 0x00000002
147#define EXT4_TUNE_FL_MAX_MNT_COUNT 0x00000004
148#define EXT4_TUNE_FL_CHECKINTRVAL 0x00000008
149#define EXT4_TUNE_FL_LAST_CHECK_TIME 0x00000010
150#define EXT4_TUNE_FL_RESERVED_BLOCKS 0x00000020
151#define EXT4_TUNE_FL_RESERVED_UID 0x00000040
152#define EXT4_TUNE_FL_RESERVED_GID 0x00000080
153#define EXT4_TUNE_FL_DEFAULT_MNT_OPTS 0x00000100
154#define EXT4_TUNE_FL_DEF_HASH_ALG 0x00000200
155#define EXT4_TUNE_FL_RAID_STRIDE 0x00000400
156#define EXT4_TUNE_FL_RAID_STRIPE_WIDTH 0x00000800
157#define EXT4_TUNE_FL_MOUNT_OPTS 0x00001000
158#define EXT4_TUNE_FL_FEATURES 0x00002000
159#define EXT4_TUNE_FL_EDIT_FEATURES 0x00004000
160#define EXT4_TUNE_FL_FORCE_FSCK 0x00008000
161#define EXT4_TUNE_FL_ENCODING 0x00010000
162#define EXT4_TUNE_FL_ENCODING_FLAGS 0x00020000
163
164/*
165 * Returned by EXT4_IOC_GET_ES_CACHE as an additional possible flag.
166 * It indicates that the entry in extent status cache is for a hole.
167 */
168#define EXT4_FIEMAP_EXTENT_HOLE 0x08000000
169
170#endif /* _UAPI_LINUX_EXT4_H */
171

source code of linux/include/uapi/linux/ext4.h