251 lines
9.1 KiB
C
251 lines
9.1 KiB
C
/*
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* libsysfs.h
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*
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* Header Definitions for libsysfs
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*
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* Copyright (C) IBM Corp. 2003
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#ifndef _LIBSYSFS_H_
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#define _LIBSYSFS_H_
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#include <sys/types.h>
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#include "dlist.h"
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/*
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* Generic #defines go here..
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*/
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#define SYSFS_FSTYPE_NAME "sysfs"
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#define SYSFS_PROC_MNTS "/proc/mounts"
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#define SYSFS_BUS_DIR "/bus"
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#define SYSFS_CLASS_DIR "/class"
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#define SYSFS_BLOCK_DIR "/block"
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#define SYSFS_DEVICES_DIR "/devices"
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#define SYSFS_DEVICES_NAME "devices"
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#define SYSFS_DRIVERS_DIR "/drivers"
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#define SYSFS_DRIVERS_NAME "drivers"
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#define SYSFS_NAME_ATTRIBUTE "name"
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#define SYSFS_UNKNOWN "unknown"
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/* Some "block" subsystem specific #defines */
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#define SYSFS_QUEUE_NAME "queue"
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#define SYSFS_IOSCHED_NAME "iosched"
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#define SYSFS_PATH_MAX 255
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#define SYSFS_NAME_LEN 50
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#define SYSFS_BUS_ID_SIZE 20
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#define SYSFS_METHOD_SHOW 0x01 /* attr can be read by user */
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#define SYSFS_METHOD_STORE 0x02 /* attr can be changed by user */
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struct sysfs_attribute {
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unsigned char *value;
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unsigned short len; /* value length */
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unsigned short method; /* show and store */
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unsigned char name[SYSFS_NAME_LEN];
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unsigned char path[SYSFS_PATH_MAX];
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};
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struct sysfs_link {
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unsigned char name[SYSFS_NAME_LEN];
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unsigned char path[SYSFS_PATH_MAX];
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unsigned char target[SYSFS_PATH_MAX];
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};
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struct sysfs_directory {
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struct dlist *subdirs;
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struct dlist *links;
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struct dlist *attributes;
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unsigned char name[SYSFS_NAME_LEN];
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unsigned char path[SYSFS_PATH_MAX];
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};
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struct sysfs_driver {
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struct dlist *devices;
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unsigned char name[SYSFS_NAME_LEN];
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unsigned char path[SYSFS_PATH_MAX];
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/* for internal use only */
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struct sysfs_directory *directory;
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};
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struct sysfs_device {
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struct sysfs_device *parent;
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struct dlist *children;
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unsigned char name[SYSFS_NAME_LEN];
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unsigned char bus_id[SYSFS_NAME_LEN];
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unsigned char path[SYSFS_PATH_MAX];
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unsigned char driver_name[SYSFS_NAME_LEN];
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/* for internal use only */
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struct sysfs_directory *directory;
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};
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struct sysfs_root_device {
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struct dlist *devices;
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unsigned char name[SYSFS_NAME_LEN];
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unsigned char path[SYSFS_PATH_MAX];
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/* for internal use only */
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struct sysfs_directory *directory;
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};
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struct sysfs_bus {
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struct dlist *drivers;
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struct dlist *devices;
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unsigned char name[SYSFS_NAME_LEN];
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unsigned char path[SYSFS_PATH_MAX];
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/* internal use only */
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struct sysfs_directory *directory;
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};
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struct sysfs_class_device {
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struct sysfs_device *sysdevice; /* NULL if virtual */
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struct sysfs_driver *driver; /* NULL if not implemented */
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unsigned char name[SYSFS_NAME_LEN];
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unsigned char path[SYSFS_PATH_MAX];
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/* for internal use only */
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struct sysfs_directory *directory;
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};
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struct sysfs_class {
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struct dlist *devices;
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unsigned char name[SYSFS_NAME_LEN];
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unsigned char path[SYSFS_PATH_MAX];
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/* for internal use only */
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struct sysfs_directory *directory;
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};
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Function Prototypes
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*/
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extern int sysfs_get_mnt_path(unsigned char *mnt_path, size_t len);
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extern int sysfs_get_name_from_path(const unsigned char *path,
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unsigned char *name, size_t len);
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extern int sysfs_get_link(const unsigned char *path, unsigned char *target,
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size_t len);
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extern struct dlist *sysfs_open_subsystem_list(unsigned char *name);
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extern struct dlist *sysfs_open_bus_devices_list(unsigned char *name);
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extern void sysfs_close_list(struct dlist *list);
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/* sysfs directory and file access */
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extern void sysfs_close_attribute(struct sysfs_attribute *sysattr);
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extern struct sysfs_attribute *sysfs_open_attribute(const unsigned char *path);
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extern int sysfs_read_attribute(struct sysfs_attribute *sysattr);
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extern int sysfs_read_attribute_value(const unsigned char *attrpath,
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unsigned char *value, size_t vsize);
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extern int sysfs_write_attribute(struct sysfs_attribute *sysattr,
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const unsigned char *new_value, size_t len);
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extern unsigned char *sysfs_get_value_from_attributes(struct dlist *attr,
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const unsigned char * name);
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extern void sysfs_close_directory(struct sysfs_directory *sysdir);
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extern struct sysfs_directory *sysfs_open_directory(const unsigned char *path);
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extern int sysfs_read_directory(struct sysfs_directory *sysdir);
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extern int sysfs_read_all_subdirs(struct sysfs_directory *sysdir);
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extern struct sysfs_directory *sysfs_get_subdirectory
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(struct sysfs_directory *dir, unsigned char *subname);
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extern void sysfs_close_link(struct sysfs_link *ln);
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extern struct sysfs_link *sysfs_open_link(const unsigned char *lnpath);
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extern struct sysfs_link *sysfs_get_directory_link(struct sysfs_directory *dir,
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unsigned char *linkname);
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extern struct sysfs_link *sysfs_get_subdirectory_link
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(struct sysfs_directory *dir, unsigned char *linkname);
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extern struct sysfs_attribute *sysfs_get_directory_attribute
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(struct sysfs_directory *dir, unsigned char *attrname);
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/* sysfs driver access */
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extern void sysfs_close_driver(struct sysfs_driver *driver);
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extern struct sysfs_driver *sysfs_open_driver(const unsigned char *path);
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extern struct sysfs_attribute *sysfs_get_driver_attr
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(struct sysfs_driver *drv, const unsigned char *name);
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extern struct dlist *sysfs_get_driver_attributes(struct sysfs_driver *driver);
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extern struct dlist *sysfs_get_driver_links(struct sysfs_driver *driver);
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extern void sysfs_close_driver_by_name(struct sysfs_driver *driver);
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extern struct sysfs_driver *sysfs_open_driver_by_name
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(const unsigned char *drv_name, const unsigned char *bus, size_t bsize);
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extern int sysfs_write_driver_attr(unsigned char *drv, unsigned char *attrib,
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unsigned char *value, size_t len);
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extern int sysfs_read_driver_attr(unsigned char *drv, unsigned char *attrib,
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unsigned char *value, size_t len);
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/* generic sysfs device access */
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extern void sysfs_close_root_device(struct sysfs_root_device *root);
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extern struct sysfs_root_device *sysfs_open_root_device
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(const unsigned char *name);
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extern void sysfs_close_device(struct sysfs_device *dev);
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extern struct sysfs_device *sysfs_open_device(const unsigned char *path);
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extern struct sysfs_attribute *sysfs_get_device_attr
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(struct sysfs_device *dev, const unsigned char *name);
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extern struct dlist *sysfs_get_device_attributes(struct sysfs_device *device);
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extern struct sysfs_device *sysfs_open_device_by_id
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(const unsigned char *bus_id, const unsigned char *bus, size_t bsize);
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extern int sysfs_write_device_attr(unsigned char *dev, unsigned char *attrib,
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unsigned char *value, size_t len);
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extern int sysfs_read_device_attr(unsigned char *dev, unsigned char *attrib,
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unsigned char *value, size_t len);
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/* generic sysfs bus access */
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extern void sysfs_close_bus(struct sysfs_bus *bus);
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extern struct sysfs_bus *sysfs_open_bus(const unsigned char *name);
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extern struct sysfs_device *sysfs_get_bus_device(struct sysfs_bus *bus,
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unsigned char *id);
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extern struct sysfs_driver *sysfs_get_bus_driver(struct sysfs_bus *bus,
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unsigned char *drvname);
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extern struct dlist *sysfs_get_bus_attributes(struct sysfs_bus *bus);
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extern struct sysfs_attribute *sysfs_get_bus_attribute(struct sysfs_bus *bus,
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unsigned char *attrname);
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extern struct sysfs_device *sysfs_open_bus_device(unsigned char *busname,
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unsigned char *dev_id);
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extern int sysfs_find_device_bus(const unsigned char *dev_id,
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unsigned char *busname, size_t bsize);
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extern int sysfs_find_driver_bus(const unsigned char *driver,
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unsigned char *busname, size_t bsize);
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/* generic sysfs class access */
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extern void sysfs_close_class_device(struct sysfs_class_device *dev);
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extern struct sysfs_class_device *sysfs_open_class_device
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(const unsigned char *path);
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extern void sysfs_close_class(struct sysfs_class *cls);
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extern struct sysfs_class *sysfs_open_class(const unsigned char *name);
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extern struct sysfs_class_device *sysfs_get_class_device
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(struct sysfs_class *class, unsigned char *name);
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extern struct sysfs_class_device *sysfs_open_class_device_by_name
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(const unsigned char *class, unsigned char *name);
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extern struct dlist *sysfs_get_classdev_attributes
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(struct sysfs_class_device *cdev);
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extern int sysfs_find_device_class(const unsigned char *bus_id,
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unsigned char *classname, size_t bsize);
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extern struct sysfs_attribute *sysfs_get_classdev_attr
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(struct sysfs_class_device *clsdev, const unsigned char *name);
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extern int sysfs_write_classdev_attr(unsigned char *dev, unsigned char *attrib,
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unsigned char *value, size_t len);
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extern int sysfs_read_classdev_attr(unsigned char *dev, unsigned char *attrib,
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unsigned char *value, size_t len);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _LIBSYSFS_H_ */
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