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[PATCH] add sysfs attr to re-emit device hotplug event

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A "coldplug + udevstart" can be simple like this:
  for i in /sys/block/*/*/uevent; do echo 1 > $i; done
  for i in /sys/class/*/*/uevent; do echo 1 > $i; done
  for i in /sys/bus/*/devices/*/uevent; do echo 1 > $i; done

Signed-off-by: Kay Sievers <kay.sievers@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Kay Sievers
2005-10-01 14:49:43 +02:00
committed by Greg Kroah-Hartman
parent d8539d81ae
commit a7fd67062e
6 changed files with 110 additions and 32 deletions
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57
include/linux/device.h
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@ -190,6 +190,18 @@ struct class_attribute class_attr_##_name = __ATTR(_name,_mode,_show,_store)
extern int class_create_file(struct class *, const struct class_attribute *);
extern void class_remove_file(struct class *, const struct class_attribute *);
struct class_device_attribute {
struct attribute attr;
ssize_t (*show)(struct class_device *, char * buf);
ssize_t (*store)(struct class_device *, const char * buf, size_t count);
};
#define CLASS_DEVICE_ATTR(_name,_mode,_show,_store) \
struct class_device_attribute class_device_attr_##_name = \
__ATTR(_name,_mode,_show,_store)
extern int class_device_create_file(struct class_device *,
const struct class_device_attribute *);
struct class_device {
struct list_head node;
@ -198,6 +210,7 @@ struct class_device {
struct class * class; /* required */
dev_t devt; /* dev_t, creates the sysfs "dev" */
struct class_device_attribute *devt_attr;
struct class_device_attribute uevent_attr;
struct device * dev; /* not necessary, but nice to have */
void * class_data; /* class-specific data */
@ -228,18 +241,6 @@ extern int class_device_rename(struct class_device *, char *);
extern struct class_device * class_device_get(struct class_device *);
extern void class_device_put(struct class_device *);
struct class_device_attribute {
struct attribute attr;
ssize_t (*show)(struct class_device *, char * buf);
ssize_t (*store)(struct class_device *, const char * buf, size_t count);
};
#define CLASS_DEVICE_ATTR(_name,_mode,_show,_store) \
struct class_device_attribute class_device_attr_##_name = \
__ATTR(_name,_mode,_show,_store)
extern int class_device_create_file(struct class_device *,
const struct class_device_attribute *);
extern void class_device_remove_file(struct class_device *,
const struct class_device_attribute *);
extern int class_device_create_bin_file(struct class_device *,
@ -266,6 +267,20 @@ extern struct class_device *class_device_create(struct class *cls, dev_t devt,
extern void class_device_destroy(struct class *cls, dev_t devt);
/* interface for exporting device attributes */
struct device_attribute {
struct attribute attr;
ssize_t (*show)(struct device *dev, struct device_attribute *attr,
char *buf);
ssize_t (*store)(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count);
};
#define DEVICE_ATTR(_name,_mode,_show,_store) \
struct device_attribute dev_attr_##_name = __ATTR(_name,_mode,_show,_store)
extern int device_create_file(struct device *device, struct device_attribute * entry);
extern void device_remove_file(struct device * dev, struct device_attribute * attr);
struct device {
struct klist klist_children;
struct klist_node knode_parent; /* node in sibling list */
@ -275,6 +290,7 @@ struct device {
struct kobject kobj;
char bus_id[BUS_ID_SIZE]; /* position on parent bus */
struct device_attribute uevent_attr;
struct semaphore sem; /* semaphore to synchronize calls to
* its driver.
@ -343,23 +359,6 @@ extern int device_attach(struct device * dev);
extern void driver_attach(struct device_driver * drv);
/* driverfs interface for exporting device attributes */
struct device_attribute {
struct attribute attr;
ssize_t (*show)(struct device *dev, struct device_attribute *attr,
char *buf);
ssize_t (*store)(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count);
};
#define DEVICE_ATTR(_name,_mode,_show,_store) \
struct device_attribute dev_attr_##_name = __ATTR(_name,_mode,_show,_store)
extern int device_create_file(struct device *device, struct device_attribute * entry);
extern void device_remove_file(struct device * dev, struct device_attribute * attr);
/*
* Platform "fixup" functions - allow the platform to have their say
* about devices and actions that the general device layer doesn't