state: storage: direct: do not close file that is not opened ...

When open failed to not try to close the invalid fd afterwards.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

state: backend_bucket_direct: max_size is always given ...

max_size is always != 0, so if(direct->max_size) can be skipped.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

state: backend-direct: Fix max_size ...

The max_size in the direct backend includes the meta data, so
substract its size when determing the max data size we can store.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

state: Convert all bufs to void * ...

A void * is a much better type for a buffer than a u8 * as it
can be casted to any other type implicitly. Convert all buffers
used by the state framework to void *.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

state: replace len_hint logic ...

The len_hint mechanism is rather hard to understand as it's not clear
from where to where the hint is passed and also it's not clear what
happens if the hint is empty or wrong.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

state: use packed attribute for on storage structs ...

These structs are used for on-storage data layouts. They should be not
affected by different integer precisions and alignment optimizations of
32bit or 64bit machines. Using the architecture independent integer data
types, like uint32_t, achieves the former, using the packed attribute
the later.

Signed-off-by: Stefan Lengfeld <s.lengfeld@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

barebox-state: Import updated state code ...

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>