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ext4: Add a uapi header for ext4 userspace APIs
Create a uapi header include/uapi/linux/ext4.h, move the ioctls and associated data structures to the uapi header, and include it from fs/ext4/ext4.h. Signed-off-by: Josh Triplett <josh@joshtriplett.org>
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,127 @@ | ||
| /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ | ||
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| #ifndef _UAPI_LINUX_EXT4_H | ||
| #define _UAPI_LINUX_EXT4_H | ||
| #include <linux/fiemap.h> | ||
| #include <linux/fs.h> | ||
| #include <linux/ioctl.h> | ||
| #include <linux/types.h> | ||
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| /* | ||
| * ext4-specific ioctl commands | ||
| */ | ||
| #define EXT4_IOC_GETVERSION _IOR('f', 3, long) | ||
| #define EXT4_IOC_SETVERSION _IOW('f', 4, long) | ||
| #define EXT4_IOC_GETVERSION_OLD FS_IOC_GETVERSION | ||
| #define EXT4_IOC_SETVERSION_OLD FS_IOC_SETVERSION | ||
| #define EXT4_IOC_GETRSVSZ _IOR('f', 5, long) | ||
| #define EXT4_IOC_SETRSVSZ _IOW('f', 6, long) | ||
| #define EXT4_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long) | ||
| #define EXT4_IOC_GROUP_ADD _IOW('f', 8, struct ext4_new_group_input) | ||
| #define EXT4_IOC_MIGRATE _IO('f', 9) | ||
| /* note ioctl 10 reserved for an early version of the FIEMAP ioctl */ | ||
| /* note ioctl 11 reserved for filesystem-independent FIEMAP ioctl */ | ||
| #define EXT4_IOC_ALLOC_DA_BLKS _IO('f', 12) | ||
| #define EXT4_IOC_MOVE_EXT _IOWR('f', 15, struct move_extent) | ||
| #define EXT4_IOC_RESIZE_FS _IOW('f', 16, __u64) | ||
| #define EXT4_IOC_SWAP_BOOT _IO('f', 17) | ||
| #define EXT4_IOC_PRECACHE_EXTENTS _IO('f', 18) | ||
| /* ioctl codes 19--39 are reserved for fscrypt */ | ||
| #define EXT4_IOC_CLEAR_ES_CACHE _IO('f', 40) | ||
| #define EXT4_IOC_GETSTATE _IOW('f', 41, __u32) | ||
| #define EXT4_IOC_GET_ES_CACHE _IOWR('f', 42, struct fiemap) | ||
| #define EXT4_IOC_CHECKPOINT _IOW('f', 43, __u32) | ||
| #define EXT4_IOC_GETFSUUID _IOR('f', 44, struct fsuuid) | ||
| #define EXT4_IOC_SETFSUUID _IOW('f', 44, struct fsuuid) | ||
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| #define EXT4_IOC_SHUTDOWN _IOR('X', 125, __u32) | ||
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| /* | ||
| * ioctl commands in 32 bit emulation | ||
| */ | ||
| #define EXT4_IOC32_GETVERSION _IOR('f', 3, int) | ||
| #define EXT4_IOC32_SETVERSION _IOW('f', 4, int) | ||
| #define EXT4_IOC32_GETRSVSZ _IOR('f', 5, int) | ||
| #define EXT4_IOC32_SETRSVSZ _IOW('f', 6, int) | ||
| #define EXT4_IOC32_GROUP_EXTEND _IOW('f', 7, unsigned int) | ||
| #define EXT4_IOC32_GROUP_ADD _IOW('f', 8, struct compat_ext4_new_group_input) | ||
| #define EXT4_IOC32_GETVERSION_OLD FS_IOC32_GETVERSION | ||
| #define EXT4_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION | ||
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| /* | ||
| * Flags returned by EXT4_IOC_GETSTATE | ||
| * | ||
| * We only expose to userspace a subset of the state flags in | ||
| * i_state_flags | ||
| */ | ||
| #define EXT4_STATE_FLAG_EXT_PRECACHED 0x00000001 | ||
| #define EXT4_STATE_FLAG_NEW 0x00000002 | ||
| #define EXT4_STATE_FLAG_NEWENTRY 0x00000004 | ||
| #define EXT4_STATE_FLAG_DA_ALLOC_CLOSE 0x00000008 | ||
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| /* | ||
| * Flags for ioctl EXT4_IOC_CHECKPOINT | ||
| */ | ||
| #define EXT4_IOC_CHECKPOINT_FLAG_DISCARD 0x1 | ||
| #define EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT 0x2 | ||
| #define EXT4_IOC_CHECKPOINT_FLAG_DRY_RUN 0x4 | ||
| #define EXT4_IOC_CHECKPOINT_FLAG_VALID (EXT4_IOC_CHECKPOINT_FLAG_DISCARD | \ | ||
| EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT | \ | ||
| EXT4_IOC_CHECKPOINT_FLAG_DRY_RUN) | ||
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| /* | ||
| * Structure for EXT4_IOC_GETFSUUID/EXT4_IOC_SETFSUUID | ||
| */ | ||
| struct fsuuid { | ||
| __u32 fsu_len; | ||
| __u32 fsu_flags; | ||
| __u8 fsu_uuid[]; | ||
| }; | ||
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| /* | ||
| * Structure for EXT4_IOC_MOVE_EXT | ||
| */ | ||
| struct move_extent { | ||
| __u32 reserved; /* should be zero */ | ||
| __u32 donor_fd; /* donor file descriptor */ | ||
| __u64 orig_start; /* logical start offset in block for orig */ | ||
| __u64 donor_start; /* logical start offset in block for donor */ | ||
| __u64 len; /* block length to be moved */ | ||
| __u64 moved_len; /* moved block length */ | ||
| }; | ||
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| /* | ||
| * Flags used by EXT4_IOC_SHUTDOWN | ||
| */ | ||
| #define EXT4_GOING_FLAGS_DEFAULT 0x0 /* going down */ | ||
| #define EXT4_GOING_FLAGS_LOGFLUSH 0x1 /* flush log but not data */ | ||
| #define EXT4_GOING_FLAGS_NOLOGFLUSH 0x2 /* don't flush log nor data */ | ||
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| /* Used to pass group descriptor data when online resize is done */ | ||
| struct ext4_new_group_input { | ||
| __u32 group; /* Group number for this data */ | ||
| __u64 block_bitmap; /* Absolute block number of block bitmap */ | ||
| __u64 inode_bitmap; /* Absolute block number of inode bitmap */ | ||
| __u64 inode_table; /* Absolute block number of inode table start */ | ||
| __u32 blocks_count; /* Total number of blocks in this group */ | ||
| __u16 reserved_blocks; /* Number of reserved blocks in this group */ | ||
| __u16 unused; | ||
| }; | ||
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| struct compat_ext4_new_group_input { | ||
| __u32 group; | ||
| compat_u64 block_bitmap; | ||
| compat_u64 inode_bitmap; | ||
| compat_u64 inode_table; | ||
| __u32 blocks_count; | ||
| __u16 reserved_blocks; | ||
| __u16 unused; | ||
| }; | ||
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| /* | ||
| * Returned by EXT4_IOC_GET_ES_CACHE as an additional possible flag. | ||
| * It indicates that the entry in extent status cache is for a hole. | ||
| */ | ||
| #define EXT4_FIEMAP_EXTENT_HOLE 0x08000000 | ||
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| #endif /* _UAPI_LINUX_EXT4_H */ |