diff options
Diffstat (limited to 'lib/ext2fs/fiemap.h')
| -rw-r--r-- | lib/ext2fs/fiemap.h | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/lib/ext2fs/fiemap.h b/lib/ext2fs/fiemap.h new file mode 100644 index 0000000..33ab8fb --- /dev/null +++ b/lib/ext2fs/fiemap.h @@ -0,0 +1,93 @@ +/* + * FS_IOC_FIEMAP ioctl infrastructure. + * + * Some portions copyright (C) 2007 Cluster File Systems, Inc + * + * Authors: Mark Fasheh <mfasheh@suse.com> + * Kalpak Shah <kalpak.shah@sun.com> + * Andreas Dilger <adilger@sun.com> + */ + +#ifndef _LINUX_FIEMAP_H +#define _LINUX_FIEMAP_H + +struct fiemap_extent { + __u64 fe_logical; /* logical offset in bytes for the start of + * the extent from the beginning of the file */ + __u64 fe_physical; /* physical offset in bytes for the start + * of the extent from the beginning of the disk */ + __u64 fe_length; /* length in bytes for this extent */ + __u64 fe_reserved64[2]; + __u32 fe_flags; /* FIEMAP_EXTENT_* flags for this extent */ + __u32 fe_reserved[3]; +}; + +struct fiemap { + __u64 fm_start; /* logical offset (inclusive) at + * which to start mapping (in) */ + __u64 fm_length; /* logical length of mapping which + * userspace wants (in) */ + __u32 fm_flags; /* FIEMAP_FLAG_* flags for request (in/out) */ + __u32 fm_mapped_extents;/* number of extents that were mapped (out) */ + __u32 fm_extent_count; /* size of fm_extents array (in) */ + __u32 fm_reserved; +#if __GNUC_PREREQ (4, 8) +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wpedantic" +#endif + struct fiemap_extent fm_extents[0]; /* array of mapped extents (out) */ +#if __GNUC_PREREQ (4, 8) +#pragma GCC diagnostic pop +#endif +}; + +#if defined(__linux__) && !defined(FS_IOC_FIEMAP) +#define FS_IOC_FIEMAP _IOWR('f', 11, struct fiemap) +#endif + +#if defined(__linux__) && !defined(FS_IOC_GETSTATE) +#define EXT4_IOC_GETSTATE _IOW('f', 41, __u32) +#endif + +#if defined(__linux__) && !defined(EXT4_IOC_GET_ES_CACHE) +#define EXT4_IOC_GET_ES_CACHE _IOWR('f', 42, struct fiemap) +#endif + +#if defined(__linux__) && !defined(EXT4_STATE_FLAG_EXT_PRECACHED) +#define EXT4_STATE_FLAG_EXT_PRECACHED 0x00000001 +#endif + +#define FIEMAP_MAX_OFFSET (~0ULL) + +#define FIEMAP_FLAG_SYNC 0x00000001 /* sync file data before map */ +#define FIEMAP_FLAG_XATTR 0x00000002 /* map extended attribute tree */ +#define FIEMAP_FLAG_CACHE 0x00000004 /* request caching of the extents */ + +#define FIEMAP_FLAGS_COMPAT (FIEMAP_FLAG_SYNC | FIEMAP_FLAG_XATTR) + +#define FIEMAP_EXTENT_LAST 0x00000001 /* Last extent in file. */ +#define FIEMAP_EXTENT_UNKNOWN 0x00000002 /* Data location unknown. */ +#define FIEMAP_EXTENT_DELALLOC 0x00000004 /* Location still pending. + * Sets EXTENT_UNKNOWN. */ +#define FIEMAP_EXTENT_ENCODED 0x00000008 /* Data can not be read + * while fs is unmounted */ +#define FIEMAP_EXTENT_DATA_ENCRYPTED 0x00000080 /* Data is encrypted by fs. + * Sets EXTENT_NO_BYPASS. */ +#define FIEMAP_EXTENT_NOT_ALIGNED 0x00000100 /* Extent offsets may not be + * block aligned. */ +#define FIEMAP_EXTENT_DATA_INLINE 0x00000200 /* Data mixed with metadata. + * Sets EXTENT_NOT_ALIGNED.*/ +#define FIEMAP_EXTENT_DATA_TAIL 0x00000400 /* Multiple files in block. + * Sets EXTENT_NOT_ALIGNED.*/ +#define FIEMAP_EXTENT_UNWRITTEN 0x00000800 /* Space allocated, but + * no data (i.e. zero). */ +#define FIEMAP_EXTENT_MERGED 0x00001000 /* File does not natively + * support extents. Result + * merged for efficiency. */ +#define FIEMAP_EXTENT_SHARED 0x00002000 /* Space shared with other + * files. */ + +#define EXT4_FIEMAP_EXTENT_HOLE 0x08000000 /* Entry in extent status + cache for a hole*/ + +#endif /* _LINUX_FIEMAP_H */ |