[U-Boot] [PATCH] fs/ext4: caculate log2blksz from blksz, other its value = 0

[Albert ARIBAUD <albert.u.boot@aribaud.net>]

Hi Dennis,

On Fri, 19 Jul 2013 20:36:33 +0800, "Dennis Lan (dlan)"
<dennis.yxun@gmail.com> wrote:

> On Fri, Jun 28, 2013 at 9:47 AM, Dennis Lan (dlan)
> <dennis.yxun@gmail.com> wrote:
> > Hi Albert, Eich
> >
> > On Thu, Jun 27, 2013 at 6:17 PM, Albert ARIBAUD
> > <albert.u.boot@aribaud.net> wrote:
> >> Hi Lan,
> >>
> >> On Thu, 27 Jun 2013 17:42:31 +0800, "Lan Yixun (dlan)"
> >> <dennis.yxun@gmail.com> wrote:
> >>
> >>> From: "Lan Yixun (dlan)" <dennis.yxun@gmail.com>
> >>>
> >>> err:
> >>> lt703a # ext4ls nand 3:0
> >>> Failed to mount ext2 filesystem...
> >>> ** Unrecognized filesystem type **
> >>>
> >>> bug may introduced by commit:
> >>>
> >>> commit 50ce4c07df1c98aabf4630b35152ed95a87242f7
> >>> Author: Egbert Eich <eich@suse.com>
> >>> Date:   Wed May 1 01:13:19 2013 +0000
> >>>
> >>>     fs/ext4: Support device block sizes != 512 bytes
> >>
> >> Please make the commit summary a description of what is wrong and how
> >> it is fixed, and move the context (how the bug was found, console
> >> output, etc) after the commit message separator '---' below.
> >>
> >> Also, fix probably typo in the commit summary (first commit message
> >> line) ("other" for "otherwise").
> >>
> > Thanks for your comments
> > I'm sending this patch mainly for pre-review, Eich, Can you have a look?
> > Since you are original patch author.
> >
> > The problem here is that uboot can't mount ext4 filesystem with
> > commit "50ce4c07df1" applied. As I looking into the code,
> >  we use hard-coded "SECTOR_SIZE"(512) previously,
> >  but now we introduce (block_dev_desc_t *)->log2blksz,
> > and problem here is that I couldn't find where/when this value been set.
> > And after calling do_ls()->fs_set_blk_dev(), the value of log2blksz
> > we got is still 0 (initialized value), which I think it's not correct.
> > As I haven't dig too much into the code, and just cook this as a quick fix..
> >
> > I'm trying to solve this by calculating log2blksz from blksz.
> >
> >
> >
> >>> Signed-off-by: Lan Yixun (dlan) <dennis.yxun@gmail.com>
> >>> ---
> >>>  disk/part.c | 4 ++++
> >>>  1 file changed, 4 insertions(+)
> >>>
> >>> diff --git a/disk/part.c b/disk/part.c
> >>> index fc8404d..dbc94c4 100644
> >>> --- a/disk/part.c
> >>> +++ b/disk/part.c
> >>> @@ -551,6 +551,8 @@ int get_device_and_partition(const char *ifname, const char *dev_part_str,
> >>>                       goto cleanup;
> >>>               }
> >>>
> >>> +             (*dev_desc)->log2blksz = LOG2((*dev_desc)->blksz);
> >>> +
> >>>               info->start = 0;
> >>>               info->size = (*dev_desc)->lba;
> >>>               info->blksz = (*dev_desc)->blksz;
> >>> @@ -634,6 +636,8 @@ int get_device_and_partition(const char *ifname, const char *dev_part_str,
> >>>               goto cleanup;
> >>>       }
> >>>
> >>> +     (*dev_desc)->log2blksz = LOG2((*dev_desc)->blksz);
> >>> +
> >>>       ret = part;
> >>>       goto cleanup;
> >>>
> >>
> >>
> >> Amicalement,
> >> --
> >> Albert.
> 
> hi Eich, Albert:
> 
> ping, any comments? or should I send another patch as v2?

Well, you've had comments already from me, and it's been three weeks,
so I reckon any other comment would have popped up by now.

Amicalement,
-- 
Albert.