On Thu, Jan 08, 2015 at 05:40:06PM -0800, Jaegeuk Kim wrote:
> Change log from v1:
> o introduce FS_IOC_GOINGDOWN ioctl
> o introduce three options: FS_GOING_DOWN_FULLSYNC, FS_GOING_DOWN_METASYNC,
> and FS_GOING_DOWN_NOSYNC
.....
> diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h
> index 3735fa0..f37c699 100644
> --- a/include/uapi/linux/fs.h
> +++ b/include/uapi/linux/fs.h
> @@ -157,6 +157,7 @@ struct inodes_stat_t {
> #define FIFREEZE _IOWR('X', 119, int) /* Freeze */
> #define FITHAW _IOWR('X', 120, int) /* Thaw */
> #define FITRIM _IOWR('X', 121, struct fstrim_range) /* Trim */
> +#define FS_IOC_GOINGDOWN _IOR('X', 125, __u32) /* shutdown */
>
> #define FS_IOC_GETFLAGS _IOR('f', 1, long)
> #define FS_IOC_SETFLAGS _IOW('f', 2, long)
> @@ -205,4 +206,11 @@ struct inodes_stat_t {
> #define SYNC_FILE_RANGE_WRITE 2
> #define SYNC_FILE_RANGE_WAIT_AFTER 4
>
> +/*
> + * Flags for going down operation used by FS_IOC_GOINGDOWN
> + */
> +#define FS_GOING_DOWN_FULLSYNC 0x0 /* going down with full sync */
> +#define FS_GOING_DOWN_METASYNC 0x1 /* going down with metadata */
> +#define FS_GOING_DOWN_NOSYNC 0x2 /* going down */
> +
> #endif /* _UAPI_LINUX_FS_H */
This is a separate patch - the first patch in the series should
add these definitions and define the XFS ioctl and flags to use them
so we can clearly see there is no change of the existing user API.
There's no need to change the XFS implementation at all.
The second patch then adds the f2fs implementation.
Cheers,
Dave.
--
Dave Chinner
david@xxxxxxxxxxxxx
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