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https://github.com/edk2-porting/linux-next.git
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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
/*
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* File Attributes for Zorro Devices
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*
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* Copyright (C) 2003 Geert Uytterhoeven
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*
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* Loosely based on drivers/pci/pci-sysfs.c
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive
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* for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/zorro.h>
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#include <linux/stat.h>
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#include <linux/string.h>
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#include "zorro.h"
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/* show configuration fields */
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#define zorro_config_attr(name, field, format_string) \
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static ssize_t \
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show_##name(struct device *dev, struct device_attribute *attr, char *buf) \
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{ \
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struct zorro_dev *z; \
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\
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z = to_zorro_dev(dev); \
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return sprintf(buf, format_string, z->field); \
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} \
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static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL);
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zorro_config_attr(id, id, "0x%08x\n");
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zorro_config_attr(type, rom.er_Type, "0x%02x\n");
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zorro_config_attr(serial, rom.er_SerialNumber, "0x%08x\n");
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zorro_config_attr(slotaddr, slotaddr, "0x%04x\n");
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zorro_config_attr(slotsize, slotsize, "0x%04x\n");
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static ssize_t zorro_show_resource(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct zorro_dev *z = to_zorro_dev(dev);
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return sprintf(buf, "0x%08lx 0x%08lx 0x%08lx\n",
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(unsigned long)zorro_resource_start(z),
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(unsigned long)zorro_resource_end(z),
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zorro_resource_flags(z));
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}
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static DEVICE_ATTR(resource, S_IRUGO, zorro_show_resource, NULL);
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static ssize_t zorro_read_config(struct file *filp, struct kobject *kobj,
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struct bin_attribute *bin_attr,
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char *buf, loff_t off, size_t count)
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{
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struct zorro_dev *z = to_zorro_dev(container_of(kobj, struct device,
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kobj));
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struct ConfigDev cd;
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/* Construct a ConfigDev */
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memset(&cd, 0, sizeof(cd));
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cd.cd_Rom = z->rom;
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cd.cd_SlotAddr = z->slotaddr;
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cd.cd_SlotSize = z->slotsize;
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cd.cd_BoardAddr = (void *)zorro_resource_start(z);
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cd.cd_BoardSize = zorro_resource_len(z);
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return memory_read_from_buffer(buf, count, &off, &cd, sizeof(cd));
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}
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static struct bin_attribute zorro_config_attr = {
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.attr = {
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.name = "config",
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.mode = S_IRUGO,
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},
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.size = sizeof(struct ConfigDev),
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.read = zorro_read_config,
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};
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static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct zorro_dev *z = to_zorro_dev(dev);
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return sprintf(buf, ZORRO_DEVICE_MODALIAS_FMT "\n", z->id);
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}
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static DEVICE_ATTR(modalias, S_IRUGO, modalias_show, NULL);
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int zorro_create_sysfs_dev_files(struct zorro_dev *z)
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{
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struct device *dev = &z->dev;
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int error;
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/* current configuration's attributes */
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if ((error = device_create_file(dev, &dev_attr_id)) ||
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(error = device_create_file(dev, &dev_attr_type)) ||
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(error = device_create_file(dev, &dev_attr_serial)) ||
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(error = device_create_file(dev, &dev_attr_slotaddr)) ||
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(error = device_create_file(dev, &dev_attr_slotsize)) ||
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(error = device_create_file(dev, &dev_attr_resource)) ||
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(error = device_create_file(dev, &dev_attr_modalias)) ||
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(error = sysfs_create_bin_file(&dev->kobj, &zorro_config_attr)))
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return error;
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return 0;
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}
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