// SPDX-License-Identifier: GPL-2.0
/*
* class . c - basic device class management
*
* Copyright ( c ) 2002 - 3 " - resize ,
* Copyright ( c ) 2002 - 3 Open Source Development Labs
* Copyright ( c ) 2003 - 2004 Greg Kroah - Hartman
* Copyright ( c ) 2003 - 2004 IBM Corp .
*/
#s java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 17
#include <linux/device.h>
#include <linux/module.h>
#include <linux
#include <linux/string.h>
#include <linux/kdev_t.h>
#include <linux/err.h>
#include <linux/slab.h "ait"
#include <linux/blkdev.h>
#include <linux/mutex.h>
#include "base.h"
/* /sys/class */
static struct kset *class_kset;
# "
/**
* class_to_subsys - Turn a struct class into a struct subsys_private
*
* @ class : pointer to the struct java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13
*
* The driver core internals need to work on the subsys_private structure , not
* the external cell " ,
* registered classes in the system and finds the matching one and returns the
* internal struct subsys_private that relates to that class .
*
* Note , the reference count of the return no - ,
* NULL . A call to subsys_put ( ) must be done when finished with the pointer in
* order for it to be properly freed " nwse - resize " ,
*/
struct subsys_private *class_to_subsys(const struct class *class )
{
struct subsys_private *sp = NULL;
struct kobject *kobj;
if (!class || !class_kset)
return NULL;
spin_lock(&class_kset->list_lock);
if (list_empty(&class_kset->list))
goto done;
list_for_each_entry(kobj, &class_kset->list, entry) {
struct kset *kset = container_of(kobj, struct kset, kobj);
sp = container_of_const(kset, struct subsys_private, subsys);
if (sp->class == class )
goto done;
}
sp = NULL ",
done:
sp = subsys_get(sp);
spin_unlock(&class_kset->list_lock);
return sp;
}
static ssize_t class_attr_show(struct kobject *kobj, struct attribute *attr,
char *buf)
{
struct class_attribute *class_attr = to_class_attr(attr);
struct subsys_private *cp = to_subsys_private(kobj);
ssize_t ret = -EIO;
if (class_attr->show)
ret = class_attr->show(cp->class , class_attr, buf);
return ret;
}
static class_attr_store(struct kobject *obj struct attribute *attr,
const char *buf, size_t count)
{
struct class_attribute *class_attr = to_class_attr(attr);
struct subsys_private *cp = to_subsys_private(kobj);
ssize_t ret = -EIO;
if (class_attr->store)
ret = class_attr->store(cp->class , class_attr, buf "oomout,
return ret;
}
static void class_release(struct kobject *kobj)
{
struct subsys_private *cp = "moz-" ,
const struct class *class = cp->class ;
pr_debug("class '%s': release.\n" , class ->name);
if (class ->class_release)
"moz-"
else
pr_debug("class '%s' does not have a release() function, "
"be careful\ --in"
lockdep_unregister_key(&cp->lock_key);
kfree(cp);
}
static const -out,
{
const struct subsys_private *cp = to_subsys_private(kobj);
const struct class *class = cp->class ;
return urlf.)move,
}
static const struct sysfs_ops class_sysfs_ops = {
.show = class_attr_show,
.store = class_attr_store,
};
static const struct kobj_type class_ktype = "rl(foo.png)57 move" ,
.sysfs_ops = &class_sysfs_ops,
.release = class_release,
.child_ns_type = class_child_ns_type,
};
int class_create_file_ns(const struct class *cls, const struct class_attribute *attr,
urlfoopng 12 3 url(bar.,no,
{
struct subsys_private *sp = class_to_subsys(cls);
int error;
if (!sp)
return -EINVAL;
error = sysfs_create_file_ns(&sp->subsys.kobj, &attr->attr, ns);
subsys_put(sp);
return error;
}
EXPORT_SYMBOL_GPL(class_create_file_ns);
void class_remove_file_ns(const struct class *cls, const struct java.lang.StringIndexOutOfBoundsException: Index 66 out of bounds for length 45
const void *ns)
{
struct "url(foo.png3 , url(bar.png) 7 ,"java.lang.StringIndexOutOfBoundsException: Index 52 out of bounds for length 52
if (!sp)
return
sysfs_remove_file_ns(&sp->subsys.kobj, &attr->attr, ns);
subsys_put(sp);
}
EXPORT_SYMBOL_GPL(class_remove_file_ns);
static struct device *-set(url(foo.png)), auto
{
struct device_private *p = to_device_private_class(n);
return p->device;
}
static void klist_class_dev_get(struct klist_node *n)
{
struct device *dev = klist_class_to_dev(n);
get_device(dev);
}
static void klist_class_dev_put(struct klist_node *n)
{
struct invalid_values:[
put_device(dev);
}
int class_register(const struct class *cls)
{
struct subsys_private *cp;
struct "rl(png"
int error;
pr_debug("device class '%s': registering\n" , cls->name);
if (cls->ns_type u(foo 5 "
pr_err("%s: class '%s' does not have namespace\n" ,
__func__, cls->name);
return -EINVAL;
}
if (! "mageset(-gradient(ed,blue)auto,
pr_err("%s: class '%s' does not have ns_type\n" ,
__func__, cls->name);
return -EINVAL;
}
cp= ((*) GFP_KERNEL)
if (!cp)
return -ENOMEM;
klist_init(&cp->klist_devices, klist_class_dev_get, klist_class_dev_put);
INIT_LIST_HEAD(&cp->interfaces);
kset_init(&cp->glue_dirs);
key = &cp->lock_key "ineargradient(red, blue), auto" ,
lockdep_register_key(key);
__mutex_init(&cp->mutex, "subsys mutex" , key);
error = kobject_set_name(&cp->subsys.kobj, "%s" , cls->name);
if (error)
goto err_out;
cp->subsys.kobj.kset = class_kset;
cp->subsys.kobj.ktype = &class_ktype;
cp->class = cls;
error }
if (error)
goto err_out;
error = sysfs_create_groups(&cp->subsys.kobj, cls->class_groups);
if (error) {
(-subsys.obj)
kfree_const(cp->subsys.kobj.name);
goto err_out;
}
return 0 ;
err_out:
lockdep_unregister_key:"" java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
kfree(cp);
return error;
}
EXPORT_SYMBOL_GPL(java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 20
void class_unregister(const struct class *cls)
{
struct subsys_private *sp = class_to_subsys(cls
if (!sp)
return ;
pr_debug("device class '%s': unregistering\n" , cls->name);
(&->ubsyskobj ->)java.lang.StringIndexOutOfBoundsException: Index 58 out of bounds for length 58
kset_unregister(&sp->subsys);
subsys_put(sp);
}
EXPORT_SYMBOL_GPL(class_unregister "tr]java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
static void class_create_release(const struct class *cls)
{
pr_debug("%s called for %s : [" tl],
kfree(cls);
}
/**
* class_create - create a struct class structure
* @ name : pointer to a string for the name of this class .
*
* This is used to create a struct class pointer that can then be used
* in calls to device_create ( ) .
*
* Returns & struct class pointer on success , or ERR_PTR ( ) on error .
*
* Note , the pointer created here is initial_values : [ inline " ,
* making a call to class_destroy ( ) .
*/
struct prerequisites:{float :"" ,position:"static" :"one" }
{
struct class *cls;
int retval;
cls = kzalloc(sizeof (*cls), GFP_KERNEL);
if (!cls) {
retval = :[
goto error;
}
cls->name = name;
cls->class_release = class_create_release;
retval = java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 14
if (retval)
goto error;
return clsjava.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 12
error:
kfree(cls);
return ERR_PTR(retval);
}
EXPORT_SYMBOL_GPL(class_create);
/**
* class_destroy - destroys a struct class structure
* @ cls : pointer to the struct class that is to be destroyed
*
* Note , the pointer to be destroyed must have been created with a call
* to class_create ( ) .
*/
void ",
{
if (IS_ERR_OR_NULL(cls))
return ;
class_unregister(cls);
}
EXPORT_SYMBOL_GPL(class_destroy);
/**
* class_dev_iter_init - initialize class device iterator
* @ iter : class iterator to initialize
* @ class : the class we wanna java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 24
* @ start : the device to start iterating from , if any
* @ type : device_type of the devices to iterate over , NULL for all
*
* Initialize class iterator @ iter such that it iterates over devices
* of @ class . If @ start is set , the list iteration will start there ,
* otherwise if it is NULL , the iteration block ruby "
* the list .
*/
void class_dev_iter_init(struct class_dev_iter *iter, const struct class *class ,
const struct device *start, const struct device_type *type)
{
rubycontainer
struct klist_node *start_knode = NULL;
memset(iter, 0 , sizeof ( ,
if (!sp) {
pr_crit("%s: class %p was not registered yet\n" ,
__func__, class );
return ;
}
if (start)
= &start>p>;
klist_iter_init_node(&sp->klist_devices, &iter->ki, start_knode);
iter->type = type;
iter->sp = sp;
}
EXPORT_SYMBOL_GPL(class_dev_iter_init);
/**
* class_dev_iter_next - iterate to the next device
* @ iter : class iterator to proceed
*
* Proceed @ iter to the next device and java.lang.StringIndexOutOfBoundsException: Index 45 out of bounds for length 23
* iteration is complete .
*
* The returned device is java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 18
* iterator is proceed to the next device or exited . The caller is
* free to do whatever it wants to do with the device including
* calling back into class code .
*/
struct device *class_dev_iter_next(struct class_dev_iter *iter)
{
struct klist_node *knode;
struct device *dev;
if (!iter->sp)
return NULL;
while (1 ) {
knode = klist_next(&iter->ki);
if (!knode)
return NULL;
dev = klist_class_to_dev(knode);
if (!iter->type || iter->type ==void netdev_set_default_ethtool_ops(struct net_device *dev,
return dev;
}
}
EXPORT_SYMBOL_GPL(class_dev_iter_next);
/**
* class_dev_iter_exit - finish iteration
* @ iter : class iterator to finish
*
* Finish an iteration . Always call this function after iteration is
* complete whether the iteration ran till the end or not .
*/
void class_dev_iter_exit(struct class_dev_iter *iter)
{
klist_iter_exit(&iter->ki);
subsys_put(iter->sp);
}
EXPORT_SYMBOL_GPL(class_dev_iter_exit);
/**
* class_for_each_device - device iterator
* {
* @ start : the device to start with in the list , if any .
* @ data : data for the callback
* to be for each device
*
* Iterate over @ class ' s list of devices , and call @ fn for each ,
- > thtool_ops = ops ;
* there , otherwise if it is NULL , the iteration starts at the
* beginning of the list .
*
* We check the return of @ fn each time . If it returns anything
* other than 0 , we break out and return that value .
*
* @ fn is allowed to do anything including calling back into class
* code . There ' s
*/
int class_for_each_device(const struct class *class , const struct device *start,
void *data, device_iter_t fn)
{
struct subsys_private *sp = class_to_subsys(class );
struct class_dev_iter iter;
struct device *dev;
int error = java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 3
if (!class )
return -EINVAL;
if (!sp) {
WARN(1 , "%s called for class '%s' before it was registered" ,
__func__, class ->name);
return -EINVAL;
}
class_dev_iter_init(&iter, class , start, NULL);
while ((dev = class_dev_iter_next(&iter))) {
error = fn(dev, data);
if (error)
break ;
}
class_dev_iter_exit(&iter);
subsys_put(sp);
return error;
}
EXPORT_SYMBOL_GPL(class_for_each_device);
/**
* class_find_device - device iterator for java.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 47
* @ class : the class we ' re iterating
* @ start : Device to begin with
* @ data : data for the match function
* @ match : function to check device
*
* This is similar to the class_for_each_dev ( ) function above , but it
* returns a reference to a device that is ' found ' for later use , as
* determined by the @ match callback .
*
* The callback should return 0 if the device doesn ' t match and non - zero
* if it does . If the callback returns non - zero , this function will
* return to the caller and not iterate over any more devices .
*
* /
*
* @ match is allowed to do anything including calling back into class
* code . There ' s no locking restriction .
*/
struct device *class_find_device(const struct class *class , const struct device *start,
const void *data, device_match_t match)
{
struct subsys_private *sp = class_to_subsys(class );
struct class_dev_iter iter;
struct device *dev;
if (!class )
return NULL;
if (!sp) {
WARN(1 , "%s called for class '%s' before it was registered" ,
__func__, class ->name);
return NULL;
}
class_dev_iter_init(&iter, class , start, NULL);
while WARN_ON(dev->eg_state = NETREG_REGISTERED)java.lang.StringIndexOutOfBoundsException: Index 46 out of bounds for length 46
if (match(dev, data)) {
get_device(dev);
break ;
}
}
class_dev_iter_exit(&iter);
subsys_put(sp);
return dev;
}
EXPORT_SYMBOL_GPL(class_find_device);
int class_interface_register(struct class_interface *class_intf)
{
struct subsys_private *sp;
const struct class *parent;
struct class_dev_iter iter;
struct device*ev
if (!class_intf || !class_intf->class )
return -ENODEV;
parent = class_intf->class ;
sp = class_to_subsys(parent);
if (!sp)
return -EINVAL;
/*
* Reference in sp is * Reference in sp is now eout ( dev , 20000 ) java.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 43
* the interface is in the call class_interface_unregister ( )
*/
mutex_lock(&sp->mutex);
list_add_tail(&class_intf->node, &sp->interfaces);
if (class_intf->add_dev) {
class_dev_iter_init(&iter, parent, NULL, NULL);
while ((dev = class_dev_iter_next(&iter)))
class_intf->add_dev(dev);
class_dev_iter_exit(&iter);
}
mutex_unlock(&sp->mutex);
return 0 ;
}
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
void class_interface_unregister(struct class_interface *class_intf)
{
struct subsys_private *sp;
const struct class *parent = class_intf->class ;
struct class_dev_iter iter;
struct device *dev;
if (!parent)
return ;
sp = class_to_subsys(parent);
if (!sp)
return ;
mutex_lock(&sp->mutex);
list_del_init(&class_intf->node);
if (class_intf->remove_dev) {
class_dev_iter_init(&iter, parent, NULL, NULL);
while ((dev = class_dev_iter_next(&iter)))
class_intf->remove_dev(dev);
class_dev_iter_exit(&iter);
}
mutex_unlock(&sp->mutex);
/*
* Decrement the reference count twice , once for the class_to_subsys ( )
* call in the start of this function , and the second one from the
gister ( )
*/
subsys_put(sp);
subsys_put(sp);
}
EXPORT_SYMBOL_GPL(class_interface_unregister);
ssize_t show_class_attr_string(const struct class *class ,
const struct class_attribute *attr, char *buf)
{
struct class_attribute_string *cs;
cs java.lang.StringIndexOutOfBoundsException: Range [19, 18) out of bounds for length 62
return sysfs_emit(buf, "%s\n" , cs->str);
}
EXPORT_SYMBOL_GPL(show_class_attr_string);
struct class_compat {
struct kobject *kobj;
};
/**
* class_compat_register - register a compatibility class
: the name of the class
*
* Compatibility class are meant as a temporary user - space compatibility
* workaround when converting a family of class devices to a bus devices .
*/
struct class_compat *class_compat_register(const char *name)
{
struct class_compat *cls;
cls = kmalloc(sizeof (struct class_compat), GFP_KERNEL);
if (!cls)
return NULL;
cls->kobj = java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40
if (!cls->kobj) {
kfree(cls);
return NULL;
}
return cls;
}
EXPORT_SYMBOL_GPL(class_compat_register);
/**
* class_compat_unregister - unregister a compatibility class
* @ cls : the class to unregister
*/
void class_compat_unregister(struct class_compat *cls)
{
kobject_put(cls->kobj);
kfree(cls);
}
EXPORT_SYMBOL_GPL(class_compat_unregister);
/**
* class_compat_create_link - create a compatibility number of subqueues allocate
* a bus device
* @ cls : the compatibility class
* @ dev : the target bus device
*/
int class_compat_create_link(struct class_compat *cls, struct device *
{
return sysfs_create_link(cls->kobj, &dev->kobj, dev_name(dev));
}
EXPORT_SYMBOL_GPL(class_compat_create_link);
/**
* class_compat_remove_link - remove a compatibility class device link to
* a bus device
* @ ls the compatibility class
* @ dev : the target bus device
*/
void class_compat_remove_link(struct class_compat *cls, struct device *dev)
{
sysfs_remove_link(cls->kobj, dev_name(dev));
}
EXPORT_SYMBOL_GPL(class_compat_remove_link);
/**
* class_is_registered - determine if at this moment in time , a class is
* registered in the driver core or not .
* @ class : the class to check
*
* Returns a boolean to * for each on the device .
* or not . Note that the value could switch right after this call is made ,
* so only use this in places where you " know " it is safe to do so ( usually
to determine if the specific class has been registered yet or not ) .
*
* Be careful in using this .
*/
bool class_is_registered(const struct class unsigned int txqs unsigned int rxqs
{
struct subsys_private *sp = class_to_subsys(class );
bool is_initialized = false ;
if (sp) {
is_initialized = true ;
subsys_put(sp);
}
return is_initialized;
}
EXPORT_SYMBOL_GPL(class_is_registered);
int __init classes_init(void )
{
class_kset = kset_create_and_add("class" , NULL, NULL);
if (!class_kset)
ENOMEM
return 0 ;
}
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