[U-Boot] [PATCH] fs: ext4: fix symlink read function

[Gary Bisson]

Hi Simon,

On Tue, Sep 8, 2015 at 5:56 AM, Simon Glass <sjg at chromium.org> wrote:
> Hi Gary,
>
> On 7 September 2015 at 03:20, Gary Bisson
> <gary.bisson at boundarydevices.com> wrote:
>> Since last API changes for files >2GB, the read of symlink is broken as
>> ext4fs_read_file now returns 0 instead of the length of the actual read.
>>
>> Signed-off-by: Gary Bisson <gary.bisson at boundarydevices.com>
>> ---
>> Hi all,
>>
>> Switching from an old v2014.07 to v2015.07 we've noticed that we couldn't
>> read symlinks any more. This is due to the API changes made to
>> ext4fs_read_file (commit 9f12cd0).
>>
>> This patch makes the read symlink check both for errors (status < 0) and
>> actual read length.
>>
>> Regards,
>> Gary
>
> Thanks for fixing this. Does the filesystem test (test/fs-test.sh)
> show this error? How could we enhance the test to detect this?

I wasn't aware of this testing script, a quick look at it makes me
think it doesn't check anything symlink-related. I guess it would
require to add SYMLINK_FILE that points to either SMALL_FILE or
BIG_FILE, read it and check the md5sum.

Regards,
Gary