ext4.h

  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 */