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authorvenkata pyla <venkata.pyla@toshiba-tsip.com>2023-12-18 10:00:30 +0530
committerRichard Purdie <richard.purdie@linuxfoundation.org>2023-12-21 10:37:28 +0000
commitbb822ab75de0020572058090439b93cc56bbf7e0 (patch)
tree6587d3d0a46c1af7b576d356c11bbbbce30ddb92 /scripts
parent7189d1ea5c066b9ffc52103160bb34945fd779d7 (diff)
downloadopenembedded-core-contrib-bb822ab75de0020572058090439b93cc56bbf7e0.tar.gz
wic: use E2FSPROGS_FAKE_TIME and hash_seed to generate reproducible ext4 images
E2FSPROGS_FAKE_TIME: sets fixed times for the inodes in the file system. hash_seed: creates reproducible directory indexes in the file system. Reference commit in e2fsprogs: e1f7100643a46456be107b33098f6034b0835e6d Signed-off-by: venkata pyla <venkata.pyla@toshiba-tsip.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat (limited to 'scripts')
-rw-r--r--scripts/lib/wic/partition.py14
1 files changed, 14 insertions, 0 deletions
diff --git a/scripts/lib/wic/partition.py b/scripts/lib/wic/partition.py
index b1a2306dd1..795707ec5d 100644
--- a/scripts/lib/wic/partition.py
+++ b/scripts/lib/wic/partition.py
@@ -284,6 +284,20 @@ class Partition():
extraopts = self.mkfs_extraopts or "-F -i 8192"
+ if os.getenv('SOURCE_DATE_EPOCH'):
+ sde_time = int(os.getenv('SOURCE_DATE_EPOCH'))
+ if pseudo:
+ pseudo = "export E2FSPROGS_FAKE_TIME=%s;%s " % (sde_time, pseudo)
+ else:
+ pseudo = "export E2FSPROGS_FAKE_TIME=%s; " % sde_time
+
+ # Set hash_seed to generate deterministic directory indexes
+ namespace = uuid.UUID("e7429877-e7b3-4a68-a5c9-2f2fdf33d460")
+ if self.fsuuid:
+ namespace = uuid.UUID(self.fsuuid)
+ hash_seed = str(uuid.uuid5(namespace, str(sde_time)))
+ extraopts += " -E hash_seed=%s" % hash_seed
+
label_str = ""
if self.label:
label_str = "-L %s" % self.label