diff options
Diffstat (limited to 'include/linux/iomap.h')
| -rw-r--r-- | include/linux/iomap.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/include/linux/iomap.h b/include/linux/iomap.h new file mode 100644 index 000000000000..1b22197bcf01 --- /dev/null +++ b/include/linux/iomap.h @@ -0,0 +1,21 @@ +#ifndef LINUX_IOMAP_H +#define LINUX_IOMAP_H 1 + +#include <linux/types.h> + +/* types of block ranges for multipage write mappings. */ +#define IOMAP_HOLE 0x01 /* no blocks allocated, need allocation */ +#define IOMAP_DELALLOC 0x02 /* delayed allocation blocks */ +#define IOMAP_MAPPED 0x03 /* blocks allocated @blkno */ +#define IOMAP_UNWRITTEN 0x04 /* blocks allocated @blkno in unwritten state */ + +#define IOMAP_NULL_BLOCK -1LL /* blkno is not valid */ + +struct iomap { + sector_t blkno; /* first sector of mapping */ + loff_t offset; /* file offset of mapping, bytes */ + u64 length; /* length of mapping, bytes */ + int type; /* type of mapping */ +}; + +#endif /* LINUX_IOMAP_H */ |