/usr/src/lttng-modules-2.5.1/wrapper/genhd.h is in lttng-modules-dkms 2.5.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 | #ifndef _LTTNG_WRAPPER_GENHD_H
#define _LTTNG_WRAPPER_GENHD_H
/*
* wrapper/genhd.h
*
* wrapper around block layer functions and data structures. Using
* KALLSYMS to get its address when available, else we need to have a
* kernel that exports this function to GPL modules.
*
* Copyright (C) 2011-2014 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/genhd.h>
#ifdef CONFIG_KALLSYMS
#include <linux/kallsyms.h>
#include "kallsyms.h"
static inline
char *wrapper_disk_name(struct gendisk *hd, int partno, char *buf)
{
char *(*disk_name_sym)(struct gendisk *hd, int partno, char *buf);
disk_name_sym = (void *) kallsyms_lookup_funcptr("disk_name");
if (disk_name_sym) {
return disk_name_sym(hd, partno, buf);
} else {
printk(KERN_WARNING "LTTng: disk_name symbol lookup failed.\n");
return NULL;
}
}
#else
static inline
char *wrapper_disk_name(struct gendisk *hd, int partno, char *buf)
{
return disk_name(hd, partno, buf);
}
#endif
#ifdef CONFIG_KALLSYMS_ALL
static inline
struct class *wrapper_get_block_class(void)
{
struct class *ptr_block_class;
ptr_block_class = (struct class *) kallsyms_lookup_dataptr("block_class");
if (!ptr_block_class) {
printk(KERN_WARNING "LTTng: block_class symbol lookup failed.\n");
return NULL;
}
return ptr_block_class;
}
static inline
struct device_type *wrapper_get_disk_type(void)
{
struct device_type *ptr_disk_type;
ptr_disk_type = (struct device_type *) kallsyms_lookup_dataptr("disk_type");
if (!ptr_disk_type) {
printk(KERN_WARNING "LTTng: disk_type symbol lookup failed.\n");
return NULL;
}
return ptr_disk_type;
}
#else
static inline
struct class *wrapper_get_block_class(void)
{
/*
* Symbol block_class is not exported.
* TODO: return &block_class;
*/
/* Feature currently unavailable without KALLSYMS_ALL */
return NULL;
}
static inline
struct device_type *wrapper_get_disk_type(void)
{
/*
* Symbol disk_type is not exported.
* TODO: return &disk_type;
*/
/* Feature currently unavailable without KALLSYMS_ALL */
return NULL;
}
#endif
#endif /* _LTTNG_WRAPPER_GENHD_H */
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