summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorSascha Hauer <s.hauer@pengutronix.de>2017-03-24 17:52:48 +0100
committerSascha Hauer <s.hauer@pengutronix.de>2017-03-31 13:57:56 +0200
commitb8b5e7b00247eeeb8e09e98c8360c8440067a095 (patch)
treee2cf57f538cf25776719af513f20a40be8d1a5f2
parent9d07a05275b4d4935b78b29883e9401ba3f79cb8 (diff)
downloaddt-utils-b8b5e7b00247eeeb8e09e98c8360c8440067a095.tar.gz
state: backend bucket circular: Explain metadata
Explain why we have metadata and where it is used. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
-rw-r--r--src/barebox-state/backend_bucket_circular.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/barebox-state/backend_bucket_circular.c b/src/barebox-state/backend_bucket_circular.c
index 5a525f6..d99ba39 100644
--- a/src/barebox-state/backend_bucket_circular.c
+++ b/src/barebox-state/backend_bucket_circular.c
@@ -61,6 +61,11 @@ struct state_backend_storage_bucket_circular {
struct device_d *dev;
};
+/*
+ * The metadata will be written directly before writesize aligned offsets.
+ * When searching backwards through the pages it allows us to find the
+ * beginning of the data.
+ */
struct __attribute__((__packed__)) state_backend_storage_bucket_circular_meta {
uint32_t magic;
uint32_t written_length;