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 */ 77 struct fsuuid { 78 __u32 fsu_len; 79 __u32 fsu_flags; 80 __u8 fsu_uuid[]; 81 }; 82 83 /* 84 * Structure for EXT4_IOC_MOVE_EXT 85 */ 86 struct 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 */ 103 struct 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 }; 112 113 struct 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[64]; 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