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-rw-r--r--fs/xfs/xfs_iomap.h26
1 files changed, 1 insertions, 25 deletions
diff --git a/fs/xfs/xfs_iomap.h b/fs/xfs/xfs_iomap.h
index d2f3b67d39f9..ba49a4fd1b3f 100644
--- a/fs/xfs/xfs_iomap.h
+++ b/fs/xfs/xfs_iomap.h
@@ -47,35 +47,11 @@ typedef enum {
47 { BMAPI_MMAP, "MMAP" }, \ 47 { BMAPI_MMAP, "MMAP" }, \
48 { BMAPI_TRYLOCK, "TRYLOCK" } 48 { BMAPI_TRYLOCK, "TRYLOCK" }
49 49
50/*
51 * xfs_iomap_t: File system I/O map
52 *
53 * The iomap_bn field is expressed in 512-byte blocks, and is where the
54 * mapping starts on disk.
55 *
56 * The iomap_offset, iomap_bsize and iomap_delta fields are in bytes.
57 * iomap_offset is the offset of the mapping in the file itself.
58 * iomap_bsize is the size of the mapping, iomap_delta is the
59 * desired data's offset into the mapping, given the offset supplied
60 * to the file I/O map routine.
61 *
62 * When a request is made to read beyond the logical end of the object,
63 * iomap_size may be set to 0, but iomap_offset and iomap_length should be set
64 * to the actual amount of underlying storage that has been allocated, if any.
65 */
66
67typedef struct xfs_iomap {
68 xfs_daddr_t iomap_bn; /* first 512B blk of mapping */
69 xfs_off_t iomap_offset; /* offset of mapping, bytes */
70 xfs_off_t iomap_bsize; /* size of mapping, bytes */
71 iomap_flags_t iomap_flags;
72} xfs_iomap_t;
73
74struct xfs_inode; 50struct xfs_inode;
75struct xfs_bmbt_irec; 51struct xfs_bmbt_irec;
76 52
77extern int xfs_iomap(struct xfs_inode *, xfs_off_t, ssize_t, int, 53extern int xfs_iomap(struct xfs_inode *, xfs_off_t, ssize_t, int,
78 struct xfs_iomap *, int *); 54 struct xfs_bmbt_irec *, int *, int *);
79extern int xfs_iomap_write_direct(struct xfs_inode *, xfs_off_t, size_t, 55extern int xfs_iomap_write_direct(struct xfs_inode *, xfs_off_t, size_t,
80 int, struct xfs_bmbt_irec *, int *, int); 56 int, struct xfs_bmbt_irec *, int *, int);
81extern int xfs_iomap_write_delay(struct xfs_inode *, xfs_off_t, size_t, int, 57extern int xfs_iomap_write_delay(struct xfs_inode *, xfs_off_t, size_t, int,