Date: Mon, 24 Jan 2022 22:16:58 -0500 From: Lee D <embaudarm@gmail.com> To: FreeBSD Hackers <freebsd-hackers@freebsd.org> Subject: Integrating UFS read-only code into my boot loader Message-ID: <CANC_bnN=6HA%2BaCE0xSnPNZZbh1s9GTZ8m6OnCO9EwRiBww9E0Q@mail.gmail.com>
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Hi, I am using my own bootloader to directly boot the FreeBSD 13 kernel on my custom Zynq (ARM) board. Currently, I load the kernel from a small DOS partition. I would like to try to integrate UFS into my bootloader so that I can read the kernel, modules and configuration directly from the UFS partition. It only needs to read, not write. In FreeBSD 11.0.1 there was file called: /src/sys/boot/common/ufsread.c That file seemed to be a complete UFS reader in a small, self contained package. It was deleted from the tree a long time ago though. Is this file still good for use with a UFS filesystem created with FreeBSD 13? I saw the whole package of files under /src/sys/ufs/, but those are deeply integrated into the world of the FreeBSD kernel and seem difficult to extract for use in a standalone, bare-metal bootloader program. Also open to other suggestions for how I might integrate UFS into my bootloader. Thanks, Lee
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