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-rw-r--r--include/linux/virtio_blk.h22
1 files changed, 13 insertions, 9 deletions
diff --git a/include/linux/virtio_blk.h b/include/linux/virtio_blk.h
index 7bd2bce0cfd9..e54635666f2c 100644
--- a/include/linux/virtio_blk.h
+++ b/include/linux/virtio_blk.h
@@ -6,15 +6,19 @@
6#define VIRTIO_ID_BLOCK 2 6#define VIRTIO_ID_BLOCK 2
7 7
8/* Feature bits */ 8/* Feature bits */
9#define VIRTIO_CONFIG_BLK_F 0x40 9#define VIRTIO_BLK_F_BARRIER 0 /* Does host support barriers? */
10#define VIRTIO_BLK_F_BARRIER 1 /* Does host support barriers? */ 10#define VIRTIO_BLK_F_SIZE_MAX 1 /* Indicates maximum segment size */
11 11#define VIRTIO_BLK_F_SEG_MAX 2 /* Indicates maximum # of segments */
12/* The capacity (in 512-byte sectors). */ 12
13#define VIRTIO_CONFIG_BLK_F_CAPACITY 0x41 13struct virtio_blk_config
14/* The maximum segment size. */ 14{
15#define VIRTIO_CONFIG_BLK_F_SIZE_MAX 0x42 15 /* The capacity (in 512-byte sectors). */
16/* The maximum number of segments. */ 16 __le64 capacity;
17#define VIRTIO_CONFIG_BLK_F_SEG_MAX 0x43 17 /* The maximum segment size (if VIRTIO_BLK_F_SIZE_MAX) */
18 __le32 size_max;
19 /* The maximum number of segments (if VIRTIO_BLK_F_SEG_MAX) */
20 __le32 seg_max;
21} __attribute__((packed));
18 22
19/* These two define direction. */ 23/* These two define direction. */
20#define VIRTIO_BLK_T_IN 0 24#define VIRTIO_BLK_T_IN 0