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* common: state: Add property to protect existing dataDaniel Schultz2018-04-161-0/+3
| | | | | | | | | | | 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>
* state: Documentation: Fix typoSascha Hauer2018-01-221-2/+2
| | | | | | underlaying -> underlying Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* state: Documentation: fix typoUlrich Ölmann2018-01-221-1/+1
| | | | | Signed-off-by: Ulrich Ölmann <u.oelmann@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* state: use the given backend storage type nameJuergen Borleis2017-09-061-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | Change 119f92b27e131a0cb506fe8d8bffe8010fb14a3d already tried to fix it, but forgets the 'direct' usecase. The 'backend-storage-type' node is optional. Its default depends on the capability of the used backend memory, which means "circular" or NULL. The latter defaults to 'direct' in the routines. If it is NULL, the devicetree fixup routine skips exporting a 'backend-storage-type' node to the kernel's devicetree. But currently if the 'backend-storage-type' node is explicitly given as 'direct', it will be skipped silently and set to NULL instead. In this case the user of the 'barebox-state' tool then ends up with the warning: "No backend-storage-type found, using default" which is annoying, because it was given. Storing the given value will still use a NULL if the 'backend-storage-type' node isn't defined, but stores everything else if it is defined. Then the 'backend-storage-type' node is present in the kernel's devicetree as well. Signed-off-by: Juergen Borleis <jbe@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* docs: rework and extend the 'state' and 'bootchooser' documentationJuergen Borleis2017-09-061-121/+211
| | | | | | | | Many links between sections and examples were added to give the developer the help to get it work. Signed-off-by: Juergen Borleis <jbe@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* state: Fix example in documentationSascha Hauer2017-05-091-1/+1
| | | | | | | The backend property must contain a phandle, so use a phandle in the example. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* state: Make an alias mandatorySascha Hauer2017-05-041-0/+6
| | | | | | | | The userspace barebox-state utility gets confused when no alias exists. Make the alias mandatory, so that people make it right^tm without having to ask. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* state: Binding: remove @0 from node nameSascha Hauer2017-05-041-1/+1
| | | | | | | | The '@0' suffix is for nodes which have a reg property, so do not use this suffix in the state example node which does not have a reg property. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* state: backend_circular: default to circular storageSascha Hauer2017-03-311-3/+3
| | | | | | | | Default to the new circular storage format which saves erase cycles. The old format can still be selected with backend-storage-type = "noncircular". Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* state: Make pointing to the backend using a phandle the only supported methodSascha Hauer2017-03-311-7/+20
| | | | | | | | | | All other methods are broken for some time already: When starting the kernel the state code rewrites the state node in the device tree and replaced the "backend" property with a phandle - even when the target can't be described as a phandle. Since using phandles is the nicest way to point to the storage device anyway remove the other methods. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* docs: state: make string variable type clearerStefan Lengfeld2016-11-031-2/+2
| | | | | | | Only fixed length strings are supported. Make the wording clearer. Signed-off-by: Stefan Lengfeld <s.lengfeld@phytec.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* docs: Add/Update state documentationMarkus Pargmann2016-07-081-1/+6
| | | | | Signed-off-by: Markus Pargmann <mpa@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* docs: fix typosUlrich Ölmann2016-02-041-1/+1
| | | | | Signed-off-by: Ulrich Ölmann <u.oelmann@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* state: implement signed int supportSascha Hauer2016-01-081-2/+3
| | | | Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* state: backend_raw: add hmac supportMarc Kleine-Budde2015-11-271-0/+19
| | | | | | | | | | | | This patch adds hmac support to the raw backend. With this patch, modifications of the header or data of a state partition can be detected, as the hmac woudln't match anymore. The hmac relies on a shared secret, which is requested from the keystore, with keystore_get_secret() using the name of the state partition as the "name" of the secret. Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* state: add support for fixed length stringsMarc Kleine-Budde2015-06-261-4/+15
| | | | | Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* state: Documentation: fix dts code exampleMarc Kleine-Budde2015-06-171-3/+3
| | | | | | | It's "uint32" not "u32" and we use integers for the "enum32" defaults. Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* state: Documentation: the backend properties are not optional (anymore)Marc Kleine-Budde2015-06-171-3/+0
| | | | | Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* state: Documentation: add newly implemented "uint8" types.Marc Kleine-Budde2015-06-171-5/+5
| | | | | | Cc: Jan Luebbe <jluebbe@debian.org> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* state: documentation: add anchor so that state can be referenced laterMarc Kleine-Budde2015-05-151-1/+3
| | | | | Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* state: add framework for persistent state handlingSascha Hauer2015-03-121-0/+107
This patch adds a framework to describe, access, store and restore a set of variables. A state variable set can be fully described in a devicetree node. This node could be part of the regular devicetree blob or it could be an extra devicetree solely for the state. The state variable set contains variables of different types and a place to store the variable set. For more information see: Documentation/devicetree/bindings/barebox/barebox,state.rst Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Jan Luebbe <jlu@pengutronix.de> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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