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author | venkata pyla <venkata.pyla@toshiba-tsip.com> | 2023-12-18 10:00:30 +0530 |
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committer | Richard Purdie <richard.purdie@linuxfoundation.org> | 2023-12-21 10:38:30 +0000 |
commit | bc8ca0bacc913aea7fe16982f04074f36e61f800 (patch) | |
tree | 6ecc57b7702c63ed0280d860d2b0f7cf6f063333 /scripts/lib | |
parent | 16a3fde3fa77b12792d70b201c07a98e05ada492 (diff) | |
download | poky-bc8ca0bacc913aea7fe16982f04074f36e61f800.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
(From OE-Core rev: bb822ab75de0020572058090439b93cc56bbf7e0)
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/lib')
-rw-r--r-- | scripts/lib/wic/partition.py | 14 |
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(): | |||
284 | 284 | ||
285 | extraopts = self.mkfs_extraopts or "-F -i 8192" | 285 | extraopts = self.mkfs_extraopts or "-F -i 8192" |
286 | 286 | ||
287 | if os.getenv('SOURCE_DATE_EPOCH'): | ||
288 | sde_time = int(os.getenv('SOURCE_DATE_EPOCH')) | ||
289 | if pseudo: | ||
290 | pseudo = "export E2FSPROGS_FAKE_TIME=%s;%s " % (sde_time, pseudo) | ||
291 | else: | ||
292 | pseudo = "export E2FSPROGS_FAKE_TIME=%s; " % sde_time | ||
293 | |||
294 | # Set hash_seed to generate deterministic directory indexes | ||
295 | namespace = uuid.UUID("e7429877-e7b3-4a68-a5c9-2f2fdf33d460") | ||
296 | if self.fsuuid: | ||
297 | namespace = uuid.UUID(self.fsuuid) | ||
298 | hash_seed = str(uuid.uuid5(namespace, str(sde_time))) | ||
299 | extraopts += " -E hash_seed=%s" % hash_seed | ||
300 | |||
287 | label_str = "" | 301 | label_str = "" |
288 | if self.label: | 302 | if self.label: |
289 | label_str = "-L %s" % self.label | 303 | label_str = "-L %s" % self.label |