ext4.h (4121B) - Raw
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 */ 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 /* _LINUX_EXT4_H */