mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 04:34:11 +08:00
2c3c8bea60
This allows bin_attr->read,write,mmap callbacks to check file specific data (such as inode owner) as part of any privilege validation. Signed-off-by: Chris Wright <chrisw@sous-sol.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
109 lines
3.1 KiB
C
109 lines
3.1 KiB
C
/*
|
|
* File Attributes for Zorro Devices
|
|
*
|
|
* Copyright (C) 2003 Geert Uytterhoeven
|
|
*
|
|
* Loosely based on drivers/pci/pci-sysfs.c
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file COPYING in the main directory of this archive
|
|
* for more details.
|
|
*/
|
|
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/zorro.h>
|
|
#include <linux/stat.h>
|
|
#include <linux/string.h>
|
|
|
|
#include "zorro.h"
|
|
|
|
|
|
/* show configuration fields */
|
|
#define zorro_config_attr(name, field, format_string) \
|
|
static ssize_t \
|
|
show_##name(struct device *dev, struct device_attribute *attr, char *buf) \
|
|
{ \
|
|
struct zorro_dev *z; \
|
|
\
|
|
z = to_zorro_dev(dev); \
|
|
return sprintf(buf, format_string, z->field); \
|
|
} \
|
|
static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL);
|
|
|
|
zorro_config_attr(id, id, "0x%08x\n");
|
|
zorro_config_attr(type, rom.er_Type, "0x%02x\n");
|
|
zorro_config_attr(serial, rom.er_SerialNumber, "0x%08x\n");
|
|
zorro_config_attr(slotaddr, slotaddr, "0x%04x\n");
|
|
zorro_config_attr(slotsize, slotsize, "0x%04x\n");
|
|
|
|
static ssize_t zorro_show_resource(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct zorro_dev *z = to_zorro_dev(dev);
|
|
|
|
return sprintf(buf, "0x%08lx 0x%08lx 0x%08lx\n",
|
|
(unsigned long)zorro_resource_start(z),
|
|
(unsigned long)zorro_resource_end(z),
|
|
zorro_resource_flags(z));
|
|
}
|
|
|
|
static DEVICE_ATTR(resource, S_IRUGO, zorro_show_resource, NULL);
|
|
|
|
static ssize_t zorro_read_config(struct file *filp, struct kobject *kobj,
|
|
struct bin_attribute *bin_attr,
|
|
char *buf, loff_t off, size_t count)
|
|
{
|
|
struct zorro_dev *z = to_zorro_dev(container_of(kobj, struct device,
|
|
kobj));
|
|
struct ConfigDev cd;
|
|
|
|
/* Construct a ConfigDev */
|
|
memset(&cd, 0, sizeof(cd));
|
|
cd.cd_Rom = z->rom;
|
|
cd.cd_SlotAddr = z->slotaddr;
|
|
cd.cd_SlotSize = z->slotsize;
|
|
cd.cd_BoardAddr = (void *)zorro_resource_start(z);
|
|
cd.cd_BoardSize = zorro_resource_len(z);
|
|
|
|
return memory_read_from_buffer(buf, count, &off, &cd, sizeof(cd));
|
|
}
|
|
|
|
static struct bin_attribute zorro_config_attr = {
|
|
.attr = {
|
|
.name = "config",
|
|
.mode = S_IRUGO,
|
|
},
|
|
.size = sizeof(struct ConfigDev),
|
|
.read = zorro_read_config,
|
|
};
|
|
|
|
static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct zorro_dev *z = to_zorro_dev(dev);
|
|
|
|
return sprintf(buf, ZORRO_DEVICE_MODALIAS_FMT "\n", z->id);
|
|
}
|
|
|
|
static DEVICE_ATTR(modalias, S_IRUGO, modalias_show, NULL);
|
|
|
|
int zorro_create_sysfs_dev_files(struct zorro_dev *z)
|
|
{
|
|
struct device *dev = &z->dev;
|
|
int error;
|
|
|
|
/* current configuration's attributes */
|
|
if ((error = device_create_file(dev, &dev_attr_id)) ||
|
|
(error = device_create_file(dev, &dev_attr_type)) ||
|
|
(error = device_create_file(dev, &dev_attr_serial)) ||
|
|
(error = device_create_file(dev, &dev_attr_slotaddr)) ||
|
|
(error = device_create_file(dev, &dev_attr_slotsize)) ||
|
|
(error = device_create_file(dev, &dev_attr_resource)) ||
|
|
(error = device_create_file(dev, &dev_attr_modalias)) ||
|
|
(error = sysfs_create_bin_file(&dev->kobj, &zorro_config_attr)))
|
|
return error;
|
|
|
|
return 0;
|
|
}
|
|
|