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[linux] Allow arbitrary settings to be applied to Linux devices

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Allow arbitrary settings to be specified on the Linux command line.
For example:

    ./bin-x86_64-linux/slirp.linux \
          --net slirp,testserver=qa-test.ipxe.org

This can be useful when using the Linux userspace build to test
embedded scripts, since it allows arbitrary parameters to be passed
directly on the command line.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2021-03-02 19:34:16 +00:00
parent 8055d5c48b
commit 7b963310aa
1 changed files with 37 additions and 13 deletions
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50
src/drivers/linux/linux.c
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@@ -130,24 +130,48 @@ struct linux_setting *linux_find_setting(char *name, struct list_head *settings)
return result; return result;
} }
void linux_apply_settings(struct list_head *new_settings, struct settings *settings_block) /**
{ * Apply Linux command-line settings
struct linux_setting *setting; *
* @v list List of command-line settings
* @v settings Settings block
*/
void linux_apply_settings ( struct list_head *list,
struct settings *settings ) {
struct linux_setting *lsetting;
struct settings *ignore;
struct setting setting;
int rc; int rc;
list_for_each_entry(setting, new_settings, list) { list_for_each_entry ( lsetting, list, list ) {
/* Skip already applied settings */ /* Skip already applied settings */
if (setting->applied) if ( lsetting->applied )
continue; continue;
struct setting *s = find_setting(setting->name); /* Parse setting name */
if (s) { if ( ( rc = parse_setting_name ( lsetting->name,
rc = storef_setting(settings_block, find_setting(setting->name), setting->value); find_child_settings, &ignore,
if (rc != 0) &setting ) ) != 0 ) {
DBG("linux storing setting '%s' = '%s' failed\n", setting->name, setting->value); DBGC ( settings, "Linux cannot parse %s: %s\n",
setting->applied = 1; lsetting->name, strerror ( rc ) );
} else { continue;
DBG("linux unknown setting '%s'\n", setting->name);
} }
/* Apply default type if not specified */
if ( ! setting.type )
setting.type = &setting_type_string;
/* Store setting */
if ( ( rc = storef_setting ( settings, &setting,
lsetting->value ) ) != 0 ) {
DBGC ( settings, "Linux cannot set %s=\"%s\": %s\n",
lsetting->name, lsetting->value,
strerror ( rc ) );
continue;
}
/* Mark setting as applied */
lsetting->applied = 1;
} }
} }