freebsd-src/usr.sbin/efitable/efitable.c
Yan-Hao Wang 1caa5d0861
efitable(8): Complete libxo transition
Reviewed by:	des
MFC after:	3 days
Differential Revision:	https://reviews.freebsd.org/D41411
2024-04-04 02:32:00 +08:00

238 lines
6.4 KiB
C

/*-
* Copyright (c) 2021 3mdeb Embedded Systems Consulting <contact@3mdeb.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/types.h>
#include <sys/efi.h>
#include <sys/efiio.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <getopt.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>
#include <uuid.h>
#include <libxo/xo.h>
#define TABLE_MAX_LEN 30
#define EFITABLE_XO_VERSION "1"
static void efi_table_print_esrt(const void *data);
static void efi_table_print_prop(const void *data);
static void usage(void) __dead2;
struct efi_table_op {
char name[TABLE_MAX_LEN];
void (*parse) (const void *);
struct uuid uuid;
};
static const struct efi_table_op efi_table_ops[] = {
{ .name = "esrt", .parse = efi_table_print_esrt,
.uuid = EFI_TABLE_ESRT },
{ .name = "prop", .parse = efi_table_print_prop,
.uuid = EFI_PROPERTIES_TABLE }
};
int
main(int argc, char **argv)
{
struct efi_get_table_ioc table = {
.buf = NULL,
.buf_len = 0,
.table_len = 0
};
int efi_fd, ch, rc = 1, efi_idx = -1;
bool got_table = false;
bool table_set = false;
bool uuid_set = false;
struct option longopts[] = {
{ "uuid", required_argument, NULL, 'u' },
{ "table", required_argument, NULL, 't' },
{ NULL, 0, NULL, 0 }
};
argc = xo_parse_args(argc, argv);
if (argc < 0)
exit(EXIT_FAILURE);
while ((ch = getopt_long(argc, argv, "u:t:", longopts, NULL)) != -1) {
switch (ch) {
case 'u':
{
char *uuid_str = optarg;
struct uuid uuid;
uint32_t status;
uuid_set = 1;
uuid_from_string(uuid_str, &uuid, &status);
if (status != uuid_s_ok)
xo_errx(EX_DATAERR, "invalid UUID");
for (size_t n = 0; n < nitems(efi_table_ops); n++) {
if (!memcmp(&uuid, &efi_table_ops[n].uuid,
sizeof(uuid))) {
efi_idx = n;
got_table = true;
break;
}
}
break;
}
case 't':
{
char *table_name = optarg;
table_set = true;
for (size_t n = 0; n < nitems(efi_table_ops); n++) {
if (!strcmp(table_name,
efi_table_ops[n].name)) {
efi_idx = n;
got_table = true;
break;
}
}
if (!got_table)
xo_errx(EX_DATAERR, "unsupported efi table");
break;
}
default:
usage();
}
}
if (!table_set && !uuid_set)
xo_errx(EX_USAGE, "table is not set");
if (!got_table)
xo_errx(EX_DATAERR, "unsupported table");
efi_fd = open("/dev/efi", O_RDWR);
if (efi_fd < 0)
xo_err(EX_OSFILE, "/dev/efi");
table.uuid = efi_table_ops[efi_idx].uuid;
if (ioctl(efi_fd, EFIIOC_GET_TABLE, &table) == -1)
xo_err(EX_OSERR, "EFIIOC_GET_TABLE (len == 0)");
table.buf = malloc(table.table_len);
table.buf_len = table.table_len;
if (ioctl(efi_fd, EFIIOC_GET_TABLE, &table) == -1)
xo_err(EX_OSERR, "EFIIOC_GET_TABLE");
efi_table_ops[efi_idx].parse(table.buf);
close(efi_fd);
return (rc);
}
static void
efi_table_print_esrt(const void *data)
{
const struct efi_esrt_entry_v1 *entries_v1;
const struct efi_esrt_table *esrt;
esrt = (const struct efi_esrt_table *)data;
xo_set_version(EFITABLE_XO_VERSION);
xo_open_container("esrt");
xo_emit("{Lwc:FwResourceCount}{:fw_resource_count/%u}\n",
esrt->fw_resource_count);
xo_emit("{Lwc:FwResourceCountMax}{:fw_resource_count_max/%u}\n",
esrt->fw_resource_count_max);
xo_emit("{Lwc:FwResourceVersion}{:fw_resource_version/%u}\n",
esrt->fw_resource_version);
xo_open_list("entries");
xo_emit("\nEntries:\n");
entries_v1 = (const void *) esrt->entries;
for (uint32_t i = 0; i < esrt->fw_resource_count; i++) {
const struct efi_esrt_entry_v1 *e = &entries_v1[i];
uint32_t status;
char *uuid;
uuid_to_string(&e->fw_class, &uuid, &status);
if (status != uuid_s_ok) {
xo_errx(EX_DATAERR, "uuid_to_string error");
}
xo_open_instance("entries");
xo_emit("\n");
xo_emit("{P: }{Lwc:FwClass}{:fw_class/%s}\n", uuid);
xo_emit("{P: }{Lwc:FwType}{:fw_type/%u}\n", e->fw_type);
xo_emit("{P: }{Lwc:FwVersion}{:fw_version/%u}\n",
e->fw_version);
xo_emit("{P: }{Lwc:LowestSupportedFwVersion}"
"{:lowest_supported_fw_version/%u}\n",
e->lowest_supported_fw_version);
xo_emit("{P: }{Lwc:CapsuleFlags}{:capsule_flags/%#x}\n",
e->capsule_flags);
xo_emit("{P: }{Lwc:LastAttemptVersion"
"}{:last_attempt_version/%u}\n", e->last_attempt_version);
xo_emit("{P: }{Lwc:LastAttemptStatus"
"}{:last_attempt_status/%u}\n", e->last_attempt_status);
xo_close_instance("entries");
}
xo_close_list("entries");
xo_close_container("esrt");
if (xo_finish() < 0)
xo_err(EX_IOERR, "stdout");
}
static void
efi_table_print_prop(const void *data)
{
const struct efi_prop_table *prop;
prop = (const struct efi_prop_table *)data;
xo_set_version(EFITABLE_XO_VERSION);
xo_open_container("prop");
xo_emit("{Lwc:Version}{:version/%#x}\n", prop->version);
xo_emit("{Lwc:Length}{:length/%u}\n", prop->length);
xo_emit("{Lwc:MemoryProtectionAttribute}"
"{:memory_protection_attribute/%#lx}\n",
prop->memory_protection_attribute);
xo_close_container("prop");
if (xo_finish() < 0)
xo_err(EX_IOERR, "stdout");
}
static void usage(void)
{
xo_error("usage: efitable [-d uuid | -t name] [--libxo]\n");
exit(EX_USAGE);
}