commit 2e1ec106dc5aac951ba884ebe4cca036e9a2d45f
Author: Sven Schnelle <svens@linux.ibm.com>
Date: Thu Dec 16 12:43:56 2021 +0100
s390: add support for --reuse-cmdline
--reuse-cmdline reads the command line of the currently
running kernel from /proc/cmdline and uses that for the
kernel that should be kexec'd.
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Reviewed-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
diff --git a/kexec/arch/s390/include/arch/options.h b/kexec/arch/s390/include/arch/options.h
index 76044a301ceb3cca013f70dff330a8ad343d808a..c150244996c79165cf1e83e331f728432b752652 100644
--- a/kexec/arch/s390/include/arch/options.h
+++ b/kexec/arch/s390/include/arch/options.h
@@ -1,9 +1,10 @@
#ifndef KEXEC_ARCH_S390_OPTIONS_H
#define KEXEC_ARCH_S390_OPTIONS_H
-#define OPT_ARCH_MAX (OPT_MAX+0)
-#define OPT_APPEND OPT_MAX+0
-#define OPT_RAMDISK OPT_MAX+1
+#define OPT_ARCH_MAX (OPT_MAX+0)
+#define OPT_APPEND (OPT_MAX+0)
+#define OPT_RAMDISK (OPT_MAX+1)
+#define OPT_REUSE_CMDLINE (OPT_MAX+2)
/* Options relevant to the architecture (excluding loader-specific ones),
* in this case none:
@@ -31,7 +32,8 @@
KEXEC_ARCH_OPTIONS \
{"command-line", 1, 0, OPT_APPEND}, \
{"append", 1, 0, OPT_APPEND}, \
- {"initrd", 1, 0, OPT_RAMDISK},
+ {"initrd", 1, 0, OPT_RAMDISK}, \
+ {"reuse-cmdline", 0, 0, OPT_REUSE_CMDLINE },
#define KEXEC_ALL_OPT_STR KEXEC_ARCH_OPT_STR
diff --git a/kexec/arch/s390/kexec-image.c b/kexec/arch/s390/kexec-image.c
index 209ab77ddccbd60f10989e2d9fc273324aefa76d..69aaf96812f741110bf323b4bb8d5dda155f293a 100644
--- a/kexec/arch/s390/kexec-image.c
+++ b/kexec/arch/s390/kexec-image.c
@@ -71,6 +71,10 @@ int image_s390_load_file(int argc, char **argv, struct kexec_info *info)
case OPT_RAMDISK:
ramdisk = optarg;
break;
+ case OPT_REUSE_CMDLINE:
+ free(info->command_line);
+ info->command_line = get_command_line();
+ break;
}
}
@@ -123,6 +127,10 @@ image_s390_load(int argc, char **argv, const char *kernel_buf,
if (command_line_add(info, optarg))
return -1;
break;
+ case OPT_REUSE_CMDLINE:
+ free(info->command_line);
+ info->command_line = get_command_line();
+ break;
case OPT_RAMDISK:
ramdisk = optarg;
break;
@@ -223,5 +231,6 @@ image_s390_usage(void)
printf("--command-line=STRING Set the kernel command line to STRING.\n"
"--append=STRING Set the kernel command line to STRING.\n"
"--initrd=FILENAME Use the file FILENAME as a ramdisk.\n"
+ "--reuse-cmdline Use kernel command line from running system.\n"
);
}