-/*
+/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
+ *
* wrapper/random.c
*
* wrapper around bootid read. Using KALLSYMS to get its address when
* modules.
*
* Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; only
- * version 2.1 of the License.
- *
- * This library 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <linux/errno.h>
/* boot_id depends on sysctl */
#if defined(CONFIG_SYSCTL)
-#include <linux/fs.h>
+#include <wrapper/fs.h>
#include <linux/file.h>
#include <linux/sched.h>
#include <linux/uaccess.h>
struct file *file;
int ret;
ssize_t len;
- mm_segment_t old_fs;
file = filp_open("/proc/sys/kernel/random/boot_id", O_RDONLY, 0);
if (IS_ERR(file))
return PTR_ERR(file);
- old_fs = get_fs();
- set_fs(KERNEL_DS);
-
- if (!file->f_op || !file->f_op->read) {
- ret = -EINVAL;
- goto end;
- }
-
- len = file->f_op->read(file, bootid, BOOT_ID_LEN - 1, &file->f_pos);
+ len = lttng_kernel_read(file, bootid, BOOT_ID_LEN - 1, &file->f_pos);
if (len != BOOT_ID_LEN - 1) {
ret = -EINVAL;
goto end;
bootid[BOOT_ID_LEN - 1] = '\0';
ret = 0;
end:
- set_fs(old_fs);
filp_close(file, current->files);
return ret;
}
+EXPORT_SYMBOL_GPL(wrapper_get_bootid);
#else
{
return -ENOSYS;
}
+EXPORT_SYMBOL_GPL(wrapper_get_bootid);
#endif