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Mon, 8 Jul 2024 10:43:07 +0000 From: "'MOESSBAUER, Felix' via isar-users" To: "isar-users@googlegroups.com" , "adithya190298@gmail.com" Subject: Re: [PATCH 3/5] wic: use E2FSPROGS_FAKE_TIME and hash_seed to generate reproducible ext4 images Thread-Topic: [PATCH 3/5] wic: use E2FSPROGS_FAKE_TIME and hash_seed to generate reproducible ext4 images Thread-Index: AQHaKSPYp2dXzOOhJUivzLFOKAgd4rF2a70AgHLrfYCABJ26gA== Date: Mon, 8 Jul 2024 10:43:07 +0000 Message-ID: <356aaf0ad95d69f5c1d023d62cfe6d8a0ac0d024.camel@siemens.com> References: <20231207154114.20400-1-venkata.pyla@toshiba-tsip.com> <20231207154114.20400-4-venkata.pyla@toshiba-tsip.com> <03db06fb48cc803750b0bdc79682cd140c027681.camel@siemens.com> <3d9226f6-f046-445e-9edc-e107111c2437n@googlegroups.com> In-Reply-To: <3d9226f6-f046-445e-9edc-e107111c2437n@googlegroups.com> Accept-Language: de-DE, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Evolution 3.46.4 x-ms-publictraffictype: Email x-ms-traffictypediagnostic: DU0PR10MB6828:EE_|AM9PR10MB4117:EE_ x-ms-office365-filtering-correlation-id: d881d8c5-949c-4bd2-2afa-08dc9f3ac132 x-ms-exchange-atpmessageproperties: SA x-ms-exchange-senderadcheck: 1 x-ms-exchange-antispam-relay: 0 x-microsoft-antispam: BCL:0;ARA:13230040|1800799024|366016|376014|38070700018; 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spf=pass (google.com: domain of felix.moessbauer@siemens.com designates 2a01:111:f403:260c::62f as permitted sender) smtp.mailfrom=felix.moessbauer@siemens.com; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=siemens.com X-Original-From: "MOESSBAUER, Felix" Reply-To: "MOESSBAUER, Felix" Precedence: list Mailing-list: list isar-users@googlegroups.com; contact isar-users+owners@googlegroups.com List-ID: X-Spam-Checked-In-Group: isar-users@googlegroups.com X-Google-Group-Id: 914930254986 List-Post: , List-Help: , List-Archive: , List-Unsubscribe: , X-Spam-Status: No, score=-4.9 required=5.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,MAILING_LIST_MULTI, RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL,RCVD_IN_RP_CERTIFIED, RCVD_IN_RP_RNBL,RCVD_IN_RP_SAFE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on shymkent.ilbers.de X-TUID: sf0aSo67l43m On Fri, 2024-07-05 at 05:13 -0700, Adithya Balakumar wrote: > Hi Felix, >=20 > I saw your mail regarding your attempt to make ext4 filesystem images > from IMAGE_CMD:ext4 reproducible.=C2=A0 > If you don't mind, could you briefly explain what was the problem you > faced in achieving this?=C2=A0 Hi, the problem is stated below: > the diff indicated that the inodes are still shuffled around). This makes me wonder if mke2fs.ext4 even supports producing a reproducible rootfs. I just copied the pattern from wic, but for whatever reason the inodes still were not deterministic. Are you sure, that this patch is sufficient to make the ext4 reproducible? Felix > I am also trying to understand on how to achieve the same. >=20 > Thanks and Regards, > Adithya Balakumar >=20 >=20 > On Tuesday, April 23, 2024 at 2:47:11=E2=80=AFPM UTC+5:30 MOESSBAUER, Fel= ix > wrote: > > On Thu, 2023-12-07 at 21:11 +0530, venkat...@toshiba-tsip.com > > wrote: > > > From: venkata pyla > > >=20 > > > E2FSPROGS_FAKE_TIME: sets fixed times for the inodes in the file > > > system. > > > hash_seed: creates reproducible directory indexes in the file > > > system. > > >=20 > > > Reference commit in e2fsprogs: > > > e1f7100643a46456be107b33098f6034b0835e6d > > >=20 > > > Signed-off-by: venkata pyla > > > --- > > > =C2=A0scripts/lib/wic/partition.py | 11 +++++++++++ > > > =C2=A01 file changed, 11 insertions(+) > > >=20 > > > diff --git a/scripts/lib/wic/partition.py > > > b/scripts/lib/wic/partition.py > > > index e50871b8..90b2c037 100644 > > > --- a/scripts/lib/wic/partition.py > > > +++ b/scripts/lib/wic/partition.py > > > @@ -280,6 +280,17 @@ class Partition(): > > > =C2=A0 > > > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 extraopts =3D self.m= kfs_extraopts or "-F -i 8192" > > > =C2=A0 > > > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 if os.getenv('SOURCE_DATE= _EPOCH'): > > > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 s= de_time =3D int(os.getenv('SOURCE_DATE_EPOCH')) > > > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 p= seudo =3D "export E2FSPROGS_FAKE_TIME=3D%s;%s" % > > > (sde_time, > > > pseudo) > > > + > > > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 #= Set hash_seed to generate deterministic directory > > > indexes > > > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 n= amespace =3D uuid.UUID("e7429877-e7b3-4a68-a5c9- > > > 2f2fdf33d460") > > > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 i= f self.fsuuid: > > > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0 namespace =3D uuid.UUID(self.fsuuid) > > > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 h= ash_seed =3D str(uuid.uuid5(namespace, > > > str(sde_time))) > > > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 e= xtraopts +=3D " -E hash_seed=3D%s" % hash_seed > > > + > >=20 > > Hi, while reworking the SDE in ISAR, I stumbled upon this as well. > > This patch only covers the .wic part, but we need a similar patch > > for > > the IMAGE_CMD:ext4 as well. I tried to mimic the pattern there, but > > I > > was not able to make the .ext4 build reproducible (the diff > > indicated > > that the inodes are still shuffled around). This makes me wonder if > > mke2fs.ext4 even supports producing a reproducible rootfs. > >=20 > > Have you been able to create a bit-by-bit identical .wic of an ext4 > > partition? > >=20 > > Best regards, > > Felix > >=20 > > > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 label_str =3D "" > > > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 if self.label: > > > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 label_str =3D "-L %s" % self.label > >=20 > > --=20 > > Siemens AG, Technology > > Linux Expert Center > >=20 > >=20 --=20 Siemens AG, Technology Linux Expert Center --=20 You received this message because you are subscribed to the Google Groups "= isar-users" group. 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