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From: Richard Weinberger <richard.weinberger@gmail.com>
To: Richard Weinberger <richard@nod.at>
Cc: Alexander Dahl <ada@thorsis.com>,
	Sascha Hauer <s.hauer@pengutronix.de>,
	linux-mtd <linux-mtd@lists.infradead.org>,
	Torben Hohn <torben.hohn@linutronix.de>
Subject: Re: [PATCH 0/1] ubifs: support authentication without hmac
Date: Tue, 30 Jun 2020 15:36:28 +0200
Message-ID: <CAFLxGvyqPB45hJ+_kejzs1-1m8XZ8QW-WyXyH+Jnvj9USZ+cEQ@mail.gmail.com> (raw)
In-Reply-To: <1067478399.71066.1593414287623.JavaMail.zimbra@nod.at>

Alex,

On Mon, Jun 29, 2020 at 9:11 AM Richard Weinberger <richard@nod.at> wrote:

> U-Boot choose the UBIFS way AFAICT.
>
> But if you have your own minimal loader you can read from an UBI static volume with
> a few lines of C (~200 LoC). This is what I see/use most of the time.
> Using static volumes in U-Boot is also possible, IIRC just use "ubi read".
>
> From http://www.linux-mtd.infradead.org/doc/ubi.html#L_overview:
> """
> There are 2 types of UBI volumes: dynamic volumes and static volumes. Static volumes are read-only and their contents are protected by CRC-32 checksums, while dynamic volumes are read-write and the upper layers (e.g., a file-system) are responsible for ensuring data integrity.
>
> Static volumes are typically used for the kernel, initramfs, and dtb. Larger static volumes may incur a significant penalty when opening, as the CRC-32 needs to be calculated at this time. If you are looking to use static volumes for anything besides the kernel, initramfs, or dtb you are likely doing something wrong and would be better off using a dynamic volume instead.
> """

Did this and Wolfgang's input help?

-- 
Thanks,
//richard

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Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-25 15:59 Torben Hohn
2020-06-25 15:59 ` [PATCH 1/1] ubifs: support authentication, for ro mount, when no key is given Torben Hohn
2020-06-26  4:31   ` Sascha Hauer
2020-06-26  7:27     ` Torben Hohn
2020-06-26  7:53       ` Richard Weinberger
2020-06-26  8:10       ` Sascha Hauer
2020-06-26  9:39         ` Torben Hohn
2020-06-26  8:09 ` [PATCH 0/1] ubifs: support authentication without hmac Richard Weinberger
2020-06-29  6:46   ` Alexander Dahl
2020-06-29  7:04     ` Richard Weinberger
2020-06-29  7:48       ` Wolfgang Denk
2020-06-29  7:51         ` Richard Weinberger
2020-06-30  5:50           ` Wolfgang Denk
2020-06-30 13:36       ` Richard Weinberger [this message]
2020-06-30 14:36         ` Alexander Dahl
2020-06-26 11:29 ` [PATCH v2 0/4] " Torben Hohn
2020-06-26 11:29   ` [PATCH v2 1/4] ubifs: move #include "debug.h" above auth.c Torben Hohn
2020-06-26 11:29   ` [PATCH v2 2/4] ubifs: support authentication, for ro mount, when no key is given Torben Hohn
2020-06-26 11:29   ` [PATCH v2 3/4] ubifs: sprinkle ubifs_assert(c, !c->ro_mount) in hmac auth Torben Hohn
2020-06-26 11:29   ` [PATCH v2 4/4] ubifs: prevent remounting rw when no hmac key was given Torben Hohn
2020-06-26 12:27     ` Richard Weinberger
2020-06-29  8:53       ` Torben Hohn
2020-06-29 10:52         ` Richard Weinberger
2020-06-26 14:16   ` [PATCH v2 0/4] ubifs: support authentication without hmac Richard Weinberger
2020-06-26 14:36     ` Richard Weinberger
2020-06-29  9:13       ` Torben Hohn
2020-06-29  9:07     ` Torben Hohn
2020-06-29 10:46       ` Richard Weinberger
2020-07-02 14:40         ` Thomas Gleixner
2020-07-02 15:00           ` Richard Weinberger
2020-07-02 18:48             ` Thomas Gleixner
2020-07-02 19:03               ` Richard Weinberger
2020-07-03  8:16                 ` bigeasy
2020-07-03  8:20                   ` Richard Weinberger
2020-07-03  9:12                 ` Thomas Gleixner

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