On 2021/02/25 16:03, Chaitanya Kulkarni wrote:
> This patch adds new structure similar to struct blk_trace to support
> block trace extensions.
>
> Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@xxxxxxx>
> ---
> include/linux/blktrace_api.h | 18 ++++++++++++++++++
> 1 file changed, 18 insertions(+)
>
> diff --git a/include/linux/blktrace_api.h b/include/linux/blktrace_api.h
> index a083e15df608..6c2654f45ad2 100644
> --- a/include/linux/blktrace_api.h
> +++ b/include/linux/blktrace_api.h
> @@ -27,6 +27,24 @@ struct blk_trace {
> atomic_t dropped;
> };
>
> +struct blk_trace_ext {
> + int trace_state;
> + struct rchan *rchan;
> + unsigned long __percpu *sequence;
> + unsigned char __percpu *msg_data;
> + u64 act_mask;
> + u32 prio_mask;
> + u64 start_lba;
> + u64 end_lba;
> + u32 pid;
> + u32 dev;
> + struct dentry *dir;
> + struct dentry *dropped_file;
> + struct dentry *msg_file;
> + struct list_head running_ext_list;
> + atomic_t dropped;
> +};
A comment describing what this structure is for would be nice.
> +
> struct blkcg;
>
> extern int blk_trace_ioctl(struct block_device *, unsigned, char __user *);
>
--
Damien Le Moal
Western Digital Research
