From bc8ca0bacc913aea7fe16982f04074f36e61f800 Mon Sep 17 00:00:00 2001 From: venkata pyla Date: Mon, 18 Dec 2023 10:00:30 +0530 Subject: 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 (From OE-Core rev: bb822ab75de0020572058090439b93cc56bbf7e0) Signed-off-by: venkata pyla Signed-off-by: Alexandre Belloni Signed-off-by: Richard Purdie --- scripts/lib/wic/partition.py | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'scripts/lib') 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 -- cgit v1.2.3-54-g00ecf