lkml.org 
[lkml]   [2018]   [Jun]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 12/14] ubi: uapi: Add mode selector to attach request
On Wed, 13 Jun 2018 23:23:42 +0200
Richard Weinberger <richard@nod.at> wrote:

> This allows userspace, ubiattach, to force a full scan.
>
> Signed-off-by: Richard Weinberger <richard@nod.at>
> ---
> include/uapi/mtd/ubi-user.h | 14 +++++++++++++-
> 1 file changed, 13 insertions(+), 1 deletion(-)
>
> diff --git a/include/uapi/mtd/ubi-user.h b/include/uapi/mtd/ubi-user.h
> index 5b04a494d139..cc0e54cfa7f9 100644
> --- a/include/uapi/mtd/ubi-user.h
> +++ b/include/uapi/mtd/ubi-user.h
> @@ -235,12 +235,19 @@ enum {
> UBI_VOL_PROP_DIRECT_WRITE = 1,
> };
>
> +enum {
> + UBI_ATTACH_MODE_AUTO = 0x0,
> + UBI_ATTACH_MODE_SCAN = 0x1,
> + UBI_ATTACH_MODE_MAX = UBI_ATTACH_MODE_SCAN,
> +};
> +
> /**
> * struct ubi_attach_req - attach MTD device request.
> * @ubi_num: UBI device number to create
> * @mtd_num: MTD device number to attach
> * @vid_hdr_offset: VID header offset (use defaults if %0)
> * @max_beb_per1024: maximum expected number of bad PEB per 1024 PEBs
> + * @attach_mode: selects the attach mode
> * @padding: reserved for future, not used, has to be zeroed
> *
> * This data structure is used to specify MTD device UBI has to attach and the
> @@ -276,13 +283,18 @@ enum {
> * eraseblocks for new bad eraseblocks, but attempts to use available
> * eraseblocks (if any). The accepted range is 0-768. If 0 is given, the
> * default kernel value of %CONFIG_MTD_UBI_BEB_LIMIT will be used.
> + *
> + * @attach_mode is %UBI_ATTACH_MODE_AUTO by default, and let's the UBI
> + * implementation decide how to attach. If %UBI_ATTACH_MODE_SCAN is selected
> + * a full scan is forced.
> */
> struct ubi_attach_req {
> __s32 ubi_num;
> __s32 mtd_num;
> __s32 vid_hdr_offset;
> __s16 max_beb_per1024;
> - __s8 padding[10];
> + __s8 attach_mode;
> + __s8 padding[9];
> };

Looks like the force full-scan is just a flag, and we might need other
flags to encode things that are not related to attach mode, so how
about creating an __u16 flags field here and defining

#define UBI_ATTACH_FLG_FORCE_FULL_SCAN 0x1

?

\
 
 \ /
  Last update: 2018-06-24 15:13    [W:0.075 / U:2.588 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site