diff options
| author | Masami Hiramatsu <mhiramat@kernel.org> | 2020-02-20 21:18:42 +0900 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2020-02-20 17:52:34 -0500 |
| commit | 85c46b78da58398be1c5166f55063c0512decd39 (patch) | |
| tree | 61c46743c7f5dd9eaec9afa135020da8b5e66d04 /include/linux/bootconfig.h | |
| parent | d8a953ddde5ec30a36810d0a892c3949b50849e9 (diff) | |
| download | lwn-85c46b78da58398be1c5166f55063c0512decd39.tar.gz lwn-85c46b78da58398be1c5166f55063c0512decd39.zip | |
bootconfig: Add bootconfig magic word for indicating bootconfig explicitly
Add bootconfig magic word to the end of bootconfig on initrd
image for indicating explicitly the bootconfig is there.
Also tools/bootconfig treats wrong size or wrong checksum or
parse error as an error, because if there is a bootconfig magic
word, there must be a bootconfig.
The bootconfig magic word is "#BOOTCONFIG\n", 12 bytes word.
Thus the block image of the initrd file with bootconfig is
as follows.
[Initrd][bootconfig][size][csum][#BOOTCONFIG\n]
Link: http://lkml.kernel.org/r/158220112263.26565.3944814205960612841.stgit@devnote2
Suggested-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'include/linux/bootconfig.h')
| -rw-r--r-- | include/linux/bootconfig.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/bootconfig.h b/include/linux/bootconfig.h index 7e18c939663e..d11e183fcb54 100644 --- a/include/linux/bootconfig.h +++ b/include/linux/bootconfig.h @@ -10,6 +10,9 @@ #include <linux/kernel.h> #include <linux/types.h> +#define BOOTCONFIG_MAGIC "#BOOTCONFIG\n" +#define BOOTCONFIG_MAGIC_LEN 12 + /* XBC tree node */ struct xbc_node { u16 next; |