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| author | Daniel Schultz <d.schultz@phytec.de> | 2018-04-12 11:13:01 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2018-04-16 09:54:11 +0200 |
| commit | 67c1c0853fa06bcbc1725e93b6ad9942e80a1e56 (patch) | |
| tree | e7595ca6de862364a112767a6c3ca09995f62833 /Documentation/devicetree | |
| parent | 6377d27b951bfddc67bba16e83f79ae1d9fa8eb9 (diff) | |
| download | barebox-67c1c0853fa06bcbc1725e93b6ad9942e80a1e56.tar.gz barebox-67c1c0853fa06bcbc1725e93b6ad9942e80a1e56.tar.xz | |
common: state: Add property to protect existing data
After an update to a newer barebox version with an enabled state
framework, existing data in storage memories could be overwritten.
Add a new property to check in front of every write task, if the meta
magic field only contains the magic number, zeros or ones.
Signed-off-by: Daniel Schultz <d.schultz@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'Documentation/devicetree')
| -rw-r--r-- | Documentation/devicetree/bindings/barebox/barebox,state.rst | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/barebox/barebox,state.rst b/Documentation/devicetree/bindings/barebox/barebox,state.rst index 872bac061b..2893937820 100644 --- a/Documentation/devicetree/bindings/barebox/barebox,state.rst +++ b/Documentation/devicetree/bindings/barebox/barebox,state.rst @@ -55,6 +55,9 @@ Optional Properties * ``algo``: A HMAC algorithm used to detect manipulation of the data or header, sensible values follow this pattern ``hmac(<HASH>)``, e.g. ``hmac(sha256)``. Only available for the ``backend-type`` ``raw``. +* ``keep-previous-content``: Check if a the bucket meta magic field contains + other data than the magic value. If so, the backend will not write the state + to prevent unconditionally overwrites of existing data. .. note:: For the ``backend-storage-type`` the keyword ``noncircular`` is still supported as a fall back to an old storage format. Recommendation is to not |