From: Pintu Agarwal <pintu.ping@gmail.com>
To: Mikulas Patocka <mpatocka@redhat.com>
Cc: snitzer@redhat.com,
Kernelnewbies <kernelnewbies@kernelnewbies.org>,
open list <linux-kernel@vger.kernel.org>,
dm-devel@redhat.com, linux-mtd <linux-mtd@lists.infradead.org>,
Sami Tolvanen <samitolvanen@google.com>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
Phillip Lougher <phillip@squashfs.org.uk>,
shli@kernel.org, agk@redhat.com
Subject: Re: [dm-devel] Kernel 4.14: Using dm-verity with squashfs rootfs - mounting issue
Date: Wed, 21 Jul 2021 20:30:38 +0530 [thread overview]
Message-ID: <CAOuPNLhh_LkLQ8mSA4eoUDLCLzHo5zHXsiQZXUB_-T_F1_v6-g@mail.gmail.com> (raw)
In-Reply-To: <alpine.LRH.2.02.2107200737510.19984@file01.intranet.prod.int.rdu2.redhat.com>
On Tue, 20 Jul 2021 at 17:12, Mikulas Patocka <mpatocka@redhat.com> wrote:
>
> Hi
>
> Try to set up dm-verity with block size 512 bytes.
>
> I don't know what block size does squashfs use, but if the filesystem
> block size is smaller than dm-verity block size, it doesn't work.
>
Okay thank you so much for this clue,
It seems we are using 65536 as the squashfs block size:
==> mksquashfs [...] - comp xz -Xdict-size 32K -noI -Xbcj arm -b 65536
-processors 1
But for dm-verity we are giving block size of 4096
==> [ 0.000000] Kernel command line:[..] verity="96160 12020
d7b8a7d0c01b9aec888930841313a81603a50a2a7be44631c4c813197a50d681 0 "
rootfstype=squashfs root=/dev/mtdblock34 ubi.mtd=30,0,30 [...]
root=/dev/dm-0 dm="system none ro,0 96160 verity 1 /dev/mtdblock34
/dev/mtdblock39 4096 4096 12020 8 sha256
d7b8a7d0c01b9aec888930841313a81603a50a2a7be44631c4c813197a50d681
aee087a5be3b982978c923f566a94613496b417f2af592639bc80d141e34dfe7"
Now, we are checking by giving squashfs block size also as 4096
In case, if this does not work, what else could be the other option ?
Can we try with initramfs approach ?
Thanks,
Pintu
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next prev parent reply other threads:[~2021-07-22 7:22 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-20 9:38 [dm-devel] Kernel 4.14: Using dm-verity with squashfs rootfs - mounting issue Pintu Agarwal
2021-07-20 11:41 ` Mikulas Patocka
2021-07-21 15:00 ` Pintu Agarwal [this message]
2021-07-21 17:10 ` Mikulas Patocka
2021-07-21 17:29 ` Pintu Agarwal
2021-08-30 16:25 ` Pintu Agarwal
2021-08-30 16:55 ` Thomas Petazzoni
2021-08-30 18:18 ` Pintu Agarwal
2021-08-30 19:12 ` Thomas Petazzoni
2021-08-31 13:19 ` Pintu Agarwal
2021-09-06 16:28 ` Pintu Agarwal
2021-09-08 11:27 ` Pintu Agarwal
2021-09-08 12:08 ` Greg KH
2021-10-29 15:51 ` Pintu Agarwal
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