[U-Boot] [PATCH v1 0/3] Add support for symlink creation in EXT4

[Tom Rini]

On Wed, Jan 30, 2019 at 12:24:29AM +0100, Lukasz Majewski wrote:
> On Tue, 29 Jan 2019 14:40:08 +0100
> Jean-Jacques Hiblot <jjhiblot at ti.com> wrote:
> 
> > This series adds support for the creation of symbolic links on ext4
> > file-systems.
> > The motivation behind this work is to have the ability to "do" the job
> > of update-alternatives in u-boot.
> > Firmware on TI's platform are usually managed with
> > update-alternatives and are thus targeted by a symbolic link. In some
> > situations we need the ability to select an alternate firmware before
> > the linux kernel is started so that when a early driver needing the
> > firmware comes up, it can be fed the firmware of our choice.
> > 
> > Tested on a am57xx_evm, using a EXT4 partition on external SDcard.
> > The filesystem can be checked later with: fsck.ext4 -f <dev>
> > 
> > usage example:
> > => ln mmc 0:2 zImage /boot/the_linux_kernel 
> 
> Could you also add a test for symlink to sandbox? This is a high level
> code (FS ext4), so it can be nice tested there.
>  
> > 
> > 
> > Jean-Jacques Hiblot (3):
> >   fs: ext4: constify the buffer passed to write functions
> >   fs: ext4: Add support for the creation of symbolic links
> >   fs: Add a new command to create symbolic links
> > 
> >  cmd/fs.c              | 14 ++++++++++++
> >  fs/ext4/ext4_common.c |  6 ++---
> >  fs/ext4/ext4_common.h |  2 +-
> >  fs/ext4/ext4_write.c  | 51
> > ++++++++++++++++++++++++++++++++----------- fs/fs.c               |
> > 44 +++++++++++++++++++++++++++++++++++++ include/ext4fs.h      |  5
> > +++-- include/fs.h          |  2 ++
> >  7 files changed, 105 insertions(+), 19 deletions(-)

Yes, now that we have tests under pytest, we need to drop something for
this under test/py/tests/test_fs/ and my first thought is in a new
test_symlink.py file so that someday when we get more than just FAT/EXTn
tests the next FS that supports symlinks gets the tests for free if/when
it supports symlinks.

-- 
Tom
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