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Diffstat (limited to 'include/linux/virtio_blk.h')
-rw-r--r--include/linux/virtio_blk.h14
1 files changed, 8 insertions, 6 deletions
diff --git a/include/linux/virtio_blk.h b/include/linux/virtio_blk.h
index bca0b10d7947..d4695a3356d0 100644
--- a/include/linux/virtio_blk.h
+++ b/include/linux/virtio_blk.h
@@ -9,6 +9,7 @@
9#define VIRTIO_BLK_F_BARRIER 0 /* Does host support barriers? */ 9#define VIRTIO_BLK_F_BARRIER 0 /* Does host support barriers? */
10#define VIRTIO_BLK_F_SIZE_MAX 1 /* Indicates maximum segment size */ 10#define VIRTIO_BLK_F_SIZE_MAX 1 /* Indicates maximum segment size */
11#define VIRTIO_BLK_F_SEG_MAX 2 /* Indicates maximum # of segments */ 11#define VIRTIO_BLK_F_SEG_MAX 2 /* Indicates maximum # of segments */
12#define VIRTIO_BLK_F_GEOMETRY 4 /* Legacy geometry available */
12 13
13struct virtio_blk_config 14struct virtio_blk_config
14{ 15{
@@ -18,6 +19,12 @@ struct virtio_blk_config
18 __le32 size_max; 19 __le32 size_max;
19 /* The maximum number of segments (if VIRTIO_BLK_F_SEG_MAX) */ 20 /* The maximum number of segments (if VIRTIO_BLK_F_SEG_MAX) */
20 __le32 seg_max; 21 __le32 seg_max;
22 /* geometry the device (if VIRTIO_BLK_F_GEOMETRY) */
23 struct virtio_blk_geometry {
24 __le16 cylinders;
25 __u8 heads;
26 __u8 sectors;
27 } geometry;
21} __attribute__((packed)); 28} __attribute__((packed));
22 29
23/* These two define direction. */ 30/* These two define direction. */
@@ -41,13 +48,8 @@ struct virtio_blk_outhdr
41 __u64 sector; 48 __u64 sector;
42}; 49};
43 50
51/* And this is the final byte of the write scatter-gather list. */
44#define VIRTIO_BLK_S_OK 0 52#define VIRTIO_BLK_S_OK 0
45#define VIRTIO_BLK_S_IOERR 1 53#define VIRTIO_BLK_S_IOERR 1
46#define VIRTIO_BLK_S_UNSUPP 2 54#define VIRTIO_BLK_S_UNSUPP 2
47
48/* This is the first element of the write scatter-gather list */
49struct virtio_blk_inhdr
50{
51 unsigned char status;
52};
53#endif /* _LINUX_VIRTIO_BLK_H */ 55#endif /* _LINUX_VIRTIO_BLK_H */