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ublk_drv: cleanup ublksrv_ctrl_dev_info

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Remove all block device related info from ublksrv_ctrl_dev_info,
meantime reduce its size into 64 bytes because:

1) ublksrv_ctrl_dev_info becomes cleaner without including any
block related info

2) generic set/get parameter command can be used to set block
related setting easily and cleanly

3) generic set/get parameter command can be used for extending
ublk without needing more info in ublksrv_ctrl_dev_info

Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20220730092750.1118167-5-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Ming Lei
2022-07-30 17:27:50 +08:00
committed by Jens Axboe
parent 0aa73170eb
commit 4bf9cbf3e9
2 changed files with 15 additions and 18 deletions
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15
include/uapi/linux/ublk_cmd.h
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@@ -80,22 +80,23 @@ struct ublksrv_ctrl_cmd {
struct ublksrv_ctrl_dev_info {
__u16 nr_hw_queues;
__u16 queue_depth;
__u16 block_size;
__u16 state;
__u16 pad0;
__u32 rq_max_blocks;
__u32 max_io_buf_bytes;
__u32 dev_id;
__u64 dev_blocks;
__s32 ublksrv_pid;
__s32 reserved0;
__u32 pad1;
__u64 flags;
__u64 flags_reserved;
/* For ublksrv internal use, invisible to ublk driver */
__u64 ublksrv_flags;
__u64 reserved1[9];
__u64 reserved0;
__u64 reserved1;
__u64 reserved2;
};
#define UBLK_IO_OP_READ 0