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s390-tools/ipl_tools/cmd_lsreipl.c
Vasily Gorbik 5dc39e87e7 ipl_tools/lsreipl: Suppress 'clear' output if not supported 
Some environments do not expose the /sys/firmware/reipl/*/clear attribute
(e.g. z/VM guests without "Load Normal" support). lsreipl currently tries to
read the attribute unconditionally for ECKD re-IPL and emits a confusing
"Could not read file .../clear" error when it is missing.

Re-IPL type: eckd
Device:      0.0.6d74
bootprog:    0
br_chr:      auto
Bootparm:    ""
Loadparm:    ""
Could not read file /sys/firmware/reipl/eckd/clear: No such file or directory
clear:       (null)
Secure boot: 0

Only print the "clear" field when the corresponding sysfs attribute is
present, avoiding the spurious error output.

Fixes: 7c24855ba1 ("ipl_tools: add support for list-directed IPL from ECKD DASD")
Reviewed-by: Jan Polensky <japo@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
2026-02-12 13:11:44 +01:00

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/*
* ipl_tools - Linux for System z reipl and shutdown tools
*
* Command: lsreipl
*
* Copyright IBM Corp. 2008, 2017
*
* s390-tools is free software; you can redistribute it and/or modify
* it under the terms of the MIT license. See LICENSE for details.
*/
#include "lib/util_path.h"
#include "lib/util_file.h"
#include "lib/util_libc.h"
#include "ipl_tools.h"
static struct {
int ipl_set; /* --ipl has been specified */
} l;
static const char *const usage_lsreipl =
"Usage: %s [OPTIONS]\n"
"\n"
"Show re-IPL or IPL settings.\n"
"\n"
"OPTIONS:\n"
" -i, --ipl Print the IPL setting\n"
" -h, --help Print this help, then exit\n"
" -v, --version Print version information, then exit\n";
static void __noreturn print_usage_lsreipl_exit(void)
{
printf(usage_lsreipl, g.prog_name);
exit(0);
}
static const char *get_ipl_banner(int show_ipl)
{
if (show_ipl)
return "IPL type:";
else
return "Re-IPL type:";
}
void print_nss(int show_ipl)
{
char *dir = show_ipl ? "ipl" : "reipl/nss";
char *path_bootparms = util_path_sysfs("firmware/%s/parm", dir);
printf("%-12s nss\n", get_ipl_banner(show_ipl));
print_fw_str("Name: %s\n", dir, "name");
if (access(path_bootparms, R_OK) == 0)
print_fw_str("Bootparms: \"%s\"\n", dir, "parm");
free(path_bootparms);
}
void print_fcp(int show_ipl, int dump)
{
char *dir = show_ipl ? "ipl" : "reipl/fcp";
char *path_bootparms = util_path_sysfs("firmware/%s/scp_data", dir);
char *path_loadparm = util_path_sysfs("firmware/%s/loadparm", dir);
char *path_reipl_clear = util_path_sysfs("firmware/reipl/fcp/clear");
char *path_secure_boot = util_path_sysfs("firmware/ipl/secure");
char *loadparm;
if (dump)
printf("%-12s fcp_dump\n", get_ipl_banner(show_ipl));
else
printf("%-12s fcp\n", get_ipl_banner(show_ipl));
print_fw_str("WWPN: %s\n", dir, "wwpn");
print_fw_str("LUN: %s\n", dir, "lun");
print_fw_str("Device: %s\n", dir, "device");
print_fw_str("bootprog: %s\n", dir, "bootprog");
print_fw_str("br_lba: %s\n", dir, "br_lba");
if (access(path_loadparm, R_OK) == 0) {
loadparm = util_file_read_text_file(path_loadparm, 1);
util_strstrip(loadparm);
printf("Loadparm: \"%s\"\n", loadparm);
free(loadparm);
}
if (access(path_bootparms, R_OK) == 0)
print_fw_str("Bootparms: \"%s\"\n", dir, "scp_data");
if (!show_ipl && access(path_reipl_clear, R_OK) == 0)
print_fw_str("clear: %s\n", dir, "clear");
if (access(path_secure_boot, R_OK) == 0)
print_fw_str("Secure boot: %s\n", "ipl", "secure");
free(path_bootparms);
free(path_loadparm);
free(path_reipl_clear);
free(path_secure_boot);
}
void print_nvme(int show_ipl, int dump)
{
char *dir = show_ipl ? "ipl" : "reipl/nvme";
char *path_bootparms = util_path_sysfs("firmware/%s/scp_data", dir);
char *path_loadparm = util_path_sysfs("firmware/%s/loadparm", dir);
char *path_reipl_clear = util_path_sysfs("firmware/reipl/nvme/clear");
char *path_secure_boot = util_path_sysfs("firmware/ipl/secure");
char *loadparm;
if (dump)
printf("%-12s nvme_dump\n", get_ipl_banner(show_ipl));
else
printf("%-12s nvme\n", get_ipl_banner(show_ipl));
print_fw_str("FID: %s\n", dir, "fid");
print_fw_str("NSID: %s\n", dir, "nsid");
print_fw_str("bootprog: %s\n", dir, "bootprog");
print_fw_str("br_lba: %s\n", dir, "br_lba");
if (access(path_loadparm, R_OK) == 0) {
loadparm = util_file_read_text_file(path_loadparm, 1);
util_strstrip(loadparm);
printf("Loadparm: \"%s\"\n", loadparm);
free(loadparm);
}
if (access(path_bootparms, R_OK) == 0)
print_fw_str("Bootparms: \"%s\"\n", dir, "scp_data");
if (!show_ipl && access(path_reipl_clear, R_OK) == 0)
print_fw_str("clear: %s\n", dir, "clear");
if (access(path_secure_boot, R_OK) == 0)
print_fw_str("Secure boot: %s\n", "ipl", "secure");
free(path_bootparms);
free(path_loadparm);
free(path_reipl_clear);
free(path_secure_boot);
}
void print_ccw(int show_ipl)
{
char *dir = show_ipl ? "ipl" : "reipl/ccw";
char *path_loadparm = util_path_sysfs("firmware/%s/loadparm", dir);
char *path_bootparms = util_path_sysfs("firmware/%s/parm", dir);
char *path_reipl_clear = util_path_sysfs("firmware/reipl/ccw/clear");
char *loadparm;
printf("%-12s ccw\n", get_ipl_banner(show_ipl));
print_fw_str("Device: %s\n", dir, "device");
if (access(path_loadparm, R_OK) == 0) {
loadparm = util_file_read_text_file(path_loadparm, 1);
util_strstrip(loadparm);
printf("Loadparm: \"%s\"\n", loadparm);
free(loadparm);
}
if (access(path_bootparms, R_OK) == 0)
print_fw_str("Bootparms: \"%s\"\n", dir, "parm");
if (!show_ipl && access(path_reipl_clear, R_OK) == 0)
print_fw_str("clear: %s\n", dir, "clear");
free(path_loadparm);
free(path_bootparms);
free(path_reipl_clear);
}
void print_eckd(int show_ipl, const char *name)
{
char *dir = show_ipl ? "ipl" : "reipl/eckd";
char *path_loadparm = util_path_sysfs("firmware/%s/loadparm", dir);
char *path_reipl_clear = util_path_sysfs("firmware/reipl/eckd/clear");
char *path_secure_boot = util_path_sysfs("firmware/ipl/secure");
char *loadparm;
printf("%-12s %s\n", get_ipl_banner(show_ipl), name);
print_fw_str("Device: %s\n", dir, "device");
print_fw_str("bootprog: %s\n", dir, "bootprog");
print_fw_str("br_chr: %s\n", dir, "br_chr");
print_fw_str("Bootparm: \"%s\"\n", dir, "scp_data");
if (access(path_loadparm, R_OK) == 0) {
loadparm = util_file_read_text_file(path_loadparm, 1);
util_strstrip(loadparm);
printf("Loadparm: \"%s\"\n", loadparm);
free(loadparm);
}
if (!show_ipl && access(path_reipl_clear, R_OK) == 0)
print_fw_str("clear: %s\n", dir, "clear");
if (access(path_secure_boot, R_OK) == 0)
print_fw_str("Secure boot: %s\n", "ipl", "secure");
free(path_loadparm);
free(path_secure_boot);
}
static void parse_lsreipl_options(int argc, char *argv[])
{
int opt, idx;
const struct option long_opts[] = {
{ "help", no_argument, NULL, 'h' },
{ "ipl", no_argument, NULL, 'i' },
{ "version", no_argument, NULL, 'v' },
{ NULL, 0, NULL, 0 }
};
while ((opt = getopt_long(argc, argv, "hvi", long_opts, &idx)) != -1) {
switch (opt) {
case 'i':
l.ipl_set = 1;
break;
case 'h':
print_usage_lsreipl_exit();
case 'v':
print_version_exit();
default:
print_help_hint_exit();
}
}
/* don't run with too many arguments */
if (optind != argc)
ERR_EXIT("Invalid positional parameter \"%s\" specified",
argv[optind]);
}
void cmd_lsreipl(int argc, char *argv[])
{
char *reipl_type_str;
parse_lsreipl_options(argc, argv);
if (l.ipl_set)
reipl_type_str = read_fw_str("ipl/ipl_type");
else
reipl_type_str = read_fw_str("reipl/reipl_type");
if (strcmp(reipl_type_str, "fcp") == 0)
print_fcp(l.ipl_set, 0);
else if (strcmp(reipl_type_str, "fcp_dump") == 0)
print_fcp(l.ipl_set, 1);
else if (strcmp(reipl_type_str, "nvme") == 0)
print_nvme(l.ipl_set, 0);
else if (strcmp(reipl_type_str, "nvme_dump") == 0)
print_nvme(l.ipl_set, 1);
else if (strcmp(reipl_type_str, "ccw") == 0)
print_ccw(l.ipl_set);
else if (strcmp(reipl_type_str, "eckd") == 0 ||
strcmp(reipl_type_str, "eckd_dump") == 0)
print_eckd(l.ipl_set, reipl_type_str);
else if (strcmp(reipl_type_str, "nss") == 0)
print_nss(l.ipl_set);
else
printf("%s: %s (unknown)\n", get_ipl_banner(l.ipl_set),
reipl_type_str);
free(reipl_type_str);
exit(0);
}
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