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Message-Id: <160576519277.320071.14260402851742732108.stgit@devnote2>
Date: Thu, 19 Nov 2020 14:53:13 +0900
From: Masami Hiramatsu <mhiramat@...nel.org>
To: Steven Rostedt <rostedt@...dmis.org>,
Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Chen Yu <yu.c.chen@...el.com>, Chen Yu <yu.chen.surf@...il.com>,
Masami Hiramatsu <mhiramat@...nel.org>,
LKML <linux-kernel@...r.kernel.org>,
Ingo Molnar <mingo@...nel.org>,
Jonathan Corbet <corbet@....net>
Subject: [PATCH v5 0/4] tools/bootconfig: Align the bootconfig applied initrd
Hi,
This is the 5th version of the bootconfig tool update to align
the total size of initrd + bootconfig to 4.
Previous version is here;
https://lkml.kernel.org/r/160571371674.277955.11736890010190945946.stgit@devnote2
This version fixes bugs in [2/4] and [3/4] and cleans up code in [3/4].
To adjust the file size, the bootconfig tool adds padding null
characters in between the boot configuration data and the footer.
The changing points are
- The bootconfig applied initrd image size is aligned to 4.
- To insert the padding null ('\0') bytes, the size in the footer
can be bigger than the actual bootconfig file size.
- But the max size of the boot configuration file is same, because
the max size doesn't include the last null characters.
In this series I keep 4 bytes aligned instead of longer size,
because only I could found was that the grub might align the initrd
filesize to 4, and U-Boot/EDK2 would not change it. So I couldn't
say what is the best size.
Anyway, I updated the documentation too, which clearly says that
the above changing points, and if the bootloader pass the wrong
size, kernel will not find bootconfig from the initrd.
Thank you,
---
Masami Hiramatsu (4):
tools/bootconfig: Fix errno reference after printf()
tools/bootconfig: Fix to check the write failure correctly
tools/bootconfig: Align the bootconfig applied initrd image size to 4
docs: bootconfig: Update file format on initrd image
tools/bootconfig/main.c | 121 +++++++++++++++++++++++------------
tools/bootconfig/test-bootconfig.sh | 6 +-
2 files changed, 85 insertions(+), 42 deletions(-)
--
Masami Hiramatsu (Linaro) <mhiramat@...nel.org>
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