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/*
* Copyright (C) 2023 Luca Boccassi <bluca@debian.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <unistd.h>
/* From linux/sed-opal.h */
struct opal_status {
uint32_t flags;
uint32_t reserved;
};
#define IOC_OPAL_GET_STATUS _IOR('p', 236, struct opal_status)
#define OPAL_FL_SUPPORTED 0x1
#define OPAL_FL_LOCKING_SUPPORTED 0x2
static inline void closep(int *fd) {
if (!fd || *fd < 0)
return;
close(*fd);
*fd = -1;
}
int main(int argc, char **argv) {
struct opal_status st = { };
__attribute__((__cleanup__(closep))) int fd = -1;
int r;
if (argc < 2) {
printf("Missing argument.\nUsage: %s device\n", argv[0]);
return EXIT_FAILURE;
}
fd = open(argv[1], O_RDONLY|O_CLOEXEC);
if (fd < 0) {
perror("Opening device failed:");
return EXIT_FAILURE;
}
r = ioctl(fd, IOC_OPAL_GET_STATUS, &st);
if (r < 0) {
perror("IOC_OPAL_GET_STATUS ioctl failed:");
return EXIT_FAILURE;
}
if (!(st.flags & (OPAL_FL_SUPPORTED|OPAL_FL_LOCKING_SUPPORTED)))
return EXIT_FAILURE;
return EXIT_SUCCESS;
}
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