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init/bootconfig: Reorder init parameter from bootconfig and cmdline

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Reorder the init parameters from bootconfig and kernel cmdline
so that the kernel cmdline always be the last part of the
parameters as below.

 " -- "[bootconfig init params][cmdline init params]

This change will help us to prevent that bootconfig init params
overwrite the init params which user gives in the command line.

Link: https://lkml.kernel.org/r/163077085675.222577.5665176468023636160.stgit@devnote2

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Masami Hiramatsu 2021-09-05 00:54:16 +09:00 committed by Steven Rostedt (VMware)
parent 40caa127f3
commit b66fbbe8d4
1 changed files with 14 additions and 9 deletions
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23
init/main.c
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@ -153,10 +153,10 @@ static char *extra_init_args;
#ifdef CONFIG_BOOT_CONFIG
/* Is bootconfig on command line? */
static bool bootconfig_found;
static bool initargs_found;
static size_t initargs_offs;
#else
# define bootconfig_found false
# define initargs_found false
# define initargs_offs 0
#endif
static char *execute_command;
@ -422,9 +422,9 @@ static void __init setup_boot_config(void)
if (IS_ERR(err) || !bootconfig_found)
return;
/* parse_args() stops at '--' and returns an address */
/* parse_args() stops at the next param of '--' and returns an address */
if (err)
initargs_found = true;
initargs_offs = err - tmp_cmdline;
if (!data) {
pr_err("'bootconfig' found on command line, but no bootconfig found\n");
@ -655,16 +655,21 @@ static void __init setup_command_line(char *command_line)
* Append supplemental init boot args to saved_command_line
* so that user can check what command line options passed
* to init.
* The order should always be
* " -- "[bootconfig init-param][cmdline init-param]
*/
len = strlen(saved_command_line);
if (initargs_found) {
saved_command_line[len++] = ' ';
if (initargs_offs) {
len = xlen + initargs_offs;
strcpy(saved_command_line + len, extra_init_args);
len += ilen - 4; /* strlen(extra_init_args) */
strcpy(saved_command_line + len,
boot_command_line + initargs_offs - 1);
} else {
len = strlen(saved_command_line);
strcpy(saved_command_line + len, " -- ");
len += 4;
strcpy(saved_command_line + len, extra_init_args);
}
strcpy(saved_command_line + len, extra_init_args);
}
}