firmware_loading_show, firmware_loading_store);
static ssize_t firmware_data_read(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
char *buffer, loff_t offset, size_t count)
{
struct class_device *class_dev = to_class_dev(kobj);
return count;
}
static ssize_t firmware_data_write(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
char *buffer, loff_t offset, size_t count)
{
struct class_device *class_dev = to_class_dev(kobj);
--- /dev/null
+Rules on how to access information in the Linux kernel sysfs
+
+The kernel exported sysfs exports internal kernel implementation-details
+and depends on internal kernel structures and layout. It is agreed upon
+by the kernel developers that the Linux kernel does not provide a stable
+internal API. As sysfs is a direct export of kernel internal
+structures, the sysfs interface can not provide a stable interface eighter,
+it may always change along with internal kernel changes.
+
+To minimize the risk of breaking users of sysfs, which are in most cases
+low-level userspace applications, with a new kernel release, the users
+of sysfs must follow some rules to use an as abstract-as-possible way to
+access this filesystem. The current udev and HAL programs already
+implement this and users are encouraged to plug, if possible, into the
+abstractions these programs provide instead of accessing sysfs
+directly.
+
+But if you really do want or need to access sysfs directly, please follow
+the following rules and then your programs should work with future
+versions of the sysfs interface.
+
+- Do not use libsysfs
+ It makes assumptions about sysfs which are not true. Its API does not
+ offer any abstraction, it exposes all the kernel driver-core
+ implementation details in its own API. Therefore it is not better than
+ reading directories and opening the files yourself.
+ Also, it is not actively maintained, in the sense of reflecting the
+ current kernel-development. The goal of providing a stable interface
+ to sysfs has failed, it causes more problems, than it solves. It
+ violates many of the rules in this document.
+
+- sysfs is always at /sys
+ Parsing /proc/mounts is a waste of time. Other mount points are a
+ system configuration bug you should not try to solve. For test cases,
+ possibly support a SYSFS_PATH environment variable to overwrite the
+ applications behavior, but never try to search for sysfs. Never try
+ to mount it, if you are not an early boot script.
+
+- devices are only "devices"
+ There is no such thing like class-, bus-, physical devices,
+ interfaces, and such that you can rely on in userspace. Everything is
+ just simply a "device". Class-, bus-, physical, ... types are just
+ kernel implementation details, which should not be expected by
+ applications that look for devices in sysfs.
+
+ The properties of a device are:
+ o devpath (/devices/pci0000:00/0000:00:1d.1/usb2/2-2/2-2:1.0)
+ - identical to the DEVPATH value in the event sent from the kernel
+ at device creation and removal
+ - the unique key to the device at that point in time
+ - the kernels path to the device-directory without the leading
+ /sys, and always starting with with a slash
+ - all elements of a devpath must be real directories. Symlinks
+ pointing to /sys/devices must always be resolved to their real
+ target, and the target path must be used to access the device.
+ That way the devpath to the device matches the devpath of the
+ kernel used at event time.
+ - using or exposing symlink values as elements in a devpath string
+ is a bug in the application
+
+ o kernel name (sda, tty, 0000:00:1f.2, ...)
+ - a directory name, identical to the last element of the devpath
+ - applications need to handle spaces and characters like '!' in
+ the name
+
+ o subsystem (block, tty, pci, ...)
+ - simple string, never a path or a link
+ - retrieved by reading the "subsystem"-link and using only the
+ last element of the target path
+
+ o driver (tg3, ata_piix, uhci_hcd)
+ - a simple string, which may contain spaces, never a path or a
+ link
+ - it is retrieved by reading the "driver"-link and using only the
+ last element of the target path
+ - devices which do not have "driver"-link, just do not have a
+ driver; copying the driver value in a child device context, is a
+ bug in the application
+
+ o attributes
+ - the files in the device directory or files below a subdirectories
+ of the same device directory
+ - accessing attributes reached by a symlink pointing to another device,
+ like the "device"-link, is a bug in the application
+
+ Everything else is just a kernel driver-core implementation detail,
+ that should not be assumed to be stable across kernel releases.
+
+- Properties of parent devices never belong into a child device.
+ Always look at the parent devices themselves for determining device
+ context properties. If the device 'eth0' or 'sda' does not have a
+ "driver"-link, then this device does not have a driver. Its value is empty.
+ Never copy any property of the parent-device into a child-device. Parent
+ device-properties may change dynamically without any notice to the
+ child device.
+
+- Hierarchy in a single device-tree
+ There is only one valid place in sysfs where hierarchy can be examined
+ and this is below: /sys/devices.
+ It is planned, that all device directories will end up in the tree
+ below this directory.
+
+- Classification by subsystem
+ There are currently three places for classification of devices:
+ /sys/block, /sys/class and /sys/bus. It is planned that these will
+ not contain any device-directories themselves, but only flat lists of
+ symlinks pointing to the unified /sys/devices tree.
+ All three places have completely different rules on how to access
+ device information. It is planned to merge all three
+ classification-directories into one place at /sys/subsystem,
+ following the layout of the bus-directories. All buses and
+ classes, including the converted block-subsystem, will show up
+ there.
+ The devices belonging to a subsystem will create a symlink in the
+ "devices" directory at /sys/subsystem/<name>/devices.
+
+ If /sys/subsystem exists, /sys/bus, /sys/class and /sys/block can be
+ ignored. If it does not exist, you have always to scan all three
+ places, as the kernel is free to move a subsystem from one place to
+ the other, as long as the devices are still reachable by the same
+ subsystem name.
+
+ Assuming /sys/class/<subsystem> and /sys/bus/<subsystem>, or
+ /sys/block and /sys/class/block are not interchangeable, is a bug in
+ the application.
+
+- Block
+ The converted block-subsystem at /sys/class/block, or
+ /sys/subsystem/block will contain the links for disks and partitions
+ at the same level, never in a hierarchy. Assuming the block-subsytem to
+ contain only disks and not partition-devices in the same flat list is
+ a bug in the application.
+
+- "device"-link and <subsystem>:<kernel name>-links
+ Never depend on the "device"-link. The "device"-link is a workaround
+ for the old layout, where class-devices are not created in
+ /sys/devices/ like the bus-devices. If the link-resolving of a
+ device-directory does not end in /sys/devices/, you can use the
+ "device"-link to find the parent devices in /sys/devices/. That is the
+ single valid use of the "device"-link, it must never appear in any
+ path as an element. Assuming the existence of the "device"-link for
+ a device in /sys/devices/ is a bug in the application.
+ Accessing /sys/class/net/eth0/device is a bug in the application.
+
+ Never depend on the class-specific links back to the /sys/class
+ directory. These links are also a workaround for the design mistake
+ that class-devices are not created in /sys/devices. If a device
+ directory does not contain directories for child devices, these links
+ may be used to find the child devices in /sys/class. That is the single
+ valid use of these links, they must never appear in any path as an
+ element. Assuming the existence of these links for devices which are
+ real child device directories in the /sys/devices tree, is a bug in
+ the application.
+
+ It is planned to remove all these links when when all class-device
+ directories live in /sys/devices.
+
+- Position of devices along device chain can change.
+ Never depend on a specific parent device position in the devpath,
+ or the chain of parent devices. The kernel is free to insert devices into
+ the chain. You must always request the parent device you are looking for
+ by its subsystem value. You need to walk up the chain until you find
+ the device that matches the expected subsystem. Depending on a specific
+ position of a parent device, or exposing relative paths, using "../" to
+ access the chain of parents, is a bug in the application.
+
unsigned int irq;
spinlock_t lock;
void __iomem *base;
+#ifdef CONFIG_PM
+ void *saved_state;
+#endif
};
struct locomo_dev_info {
if (!save)
return -ENOMEM;
- dev->dev.power.saved_state = (void *) save;
+ lchip->saved_state = save;
spin_lock_irqsave(&lchip->lock, flags);
struct locomo_save_data *save;
unsigned long r;
unsigned long flags;
-
- save = (struct locomo_save_data *) dev->dev.power.saved_state;
+
+ save = lchip->saved_state;
if (!save)
return 0;
locomo_writel(0x1, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KCMD);
spin_unlock_irqrestore(&lchip->lock, flags);
+
+ lchip->saved_state = NULL;
kfree(save);
return 0;
int irq;
spinlock_t lock;
void __iomem *base;
+#ifdef CONFIG_PM
+ void *saved_state;
+#endif
};
/*
save = kmalloc(sizeof(struct sa1111_save_data), GFP_KERNEL);
if (!save)
return -ENOMEM;
- dev->dev.power.saved_state = save;
+ sachip->saved_state = save;
spin_lock_irqsave(&sachip->lock, flags);
unsigned long flags, id;
void __iomem *base;
- save = (struct sa1111_save_data *)dev->dev.power.saved_state;
+ save = sachip->saved_state;
if (!save)
return 0;
spin_unlock_irqrestore(&sachip->lock, flags);
- dev->dev.power.saved_state = NULL;
+ sachip->saved_state = NULL;
kfree(save);
return 0;
platform_set_drvdata(pdev, NULL);
#ifdef CONFIG_PM
- kfree(pdev->dev.power.saved_state);
- pdev->dev.power.saved_state = NULL;
+ kfree(sachip->saved_state);
+ sachip->saved_state = NULL;
#endif
}
/*
* LDM power management.
*/
+static unsigned int neponset_saved_state;
+
static int neponset_suspend(struct platform_device *dev, pm_message_t state)
{
/*
* Save state.
*/
- if (!dev->dev.power.saved_state)
- dev->dev.power.saved_state = kmalloc(sizeof(unsigned int), GFP_KERNEL);
- if (!dev->dev.power.saved_state)
- return -ENOMEM;
-
- *(unsigned int *)dev->dev.power.saved_state = NCR_0;
+ neponset_saved_state = NCR_0;
return 0;
}
static int neponset_resume(struct platform_device *dev)
{
- if (dev->dev.power.saved_state) {
- NCR_0 = *(unsigned int *)dev->dev.power.saved_state;
- kfree(dev->dev.power.saved_state);
- dev->dev.power.saved_state = NULL;
- }
+ NCR_0 = neponset_saved_state;
return 0;
}
.attr = {
.name = "hs_reg",
.mode = S_IRUGO | S_IWUSR,
- .owner = THIS_MODULE,
},
.size = VAL_LEN_MAX,
.read = mv64xxx_hs_reg_read,
.attr = {
.name = "binary_parameter",
.mode = S_IRUGO,
- .owner = THIS_MODULE,
},
.size = PAGE_SIZE,
.read = &ipl_parameter_read,
.attr = {
.name = "scp_data",
.mode = S_IRUGO,
- .owner = THIS_MODULE,
},
.size = PAGE_SIZE,
.read = &ipl_scp_data_read,
#include <linux/slab.h>
#include <linux/list.h>
#include <linux/module.h>
+#include <linux/mutex.h>
#include "base.h"
extern char *make_class_name(const char *name, struct kobject *kobj);
-extern void devres_release_all(struct device *dev);
+extern int devres_release_all(struct device *dev);
extern struct kset devices_subsys;
}
}
-static struct kobj_type ktype_bus = {
+static struct kobj_type bus_ktype = {
.sysfs_ops = &bus_sysfs_ops,
+};
+
+static int bus_uevent_filter(struct kset *kset, struct kobject *kobj)
+{
+ struct kobj_type *ktype = get_ktype(kobj);
+ if (ktype == &bus_ktype)
+ return 1;
+ return 0;
+}
+
+static struct kset_uevent_ops bus_uevent_ops = {
+ .filter = bus_uevent_filter,
};
-static decl_subsys(bus, &ktype_bus, NULL);
+static decl_subsys(bus, &bus_ktype, &bus_uevent_ops);
#ifdef CONFIG_HOTPLUG
bus->drivers_probe_attr.attr.name = "drivers_probe";
bus->drivers_probe_attr.attr.mode = S_IWUSR;
- bus->drivers_probe_attr.attr.owner = bus->owner;
bus->drivers_probe_attr.store = store_drivers_probe;
retval = bus_create_file(bus, &bus->drivers_probe_attr);
if (retval)
bus->drivers_autoprobe_attr.attr.name = "drivers_autoprobe";
bus->drivers_autoprobe_attr.attr.mode = S_IWUSR | S_IRUGO;
- bus->drivers_autoprobe_attr.attr.owner = bus->owner;
bus->drivers_autoprobe_attr.show = show_drivers_autoprobe;
bus->drivers_autoprobe_attr.store = store_drivers_autoprobe;
retval = bus_create_file(bus, &bus->drivers_autoprobe_attr);
if (error)
goto out_put_bus;
drv->kobj.kset = &bus->drivers;
- if ((error = kobject_register(&drv->kobj)))
+ error = kobject_register(&drv->kobj);
+ if (error)
goto out_put_bus;
if (drv->bus->drivers_autoprobe) {
if (bus->bus_attrs) {
for (i = 0; attr_name(bus->bus_attrs[i]); i++) {
- if ((error = bus_create_file(bus,&bus->bus_attrs[i])))
+ error = bus_create_file(bus,&bus->bus_attrs[i]);
+ if (error)
goto Err;
}
}
pr_debug("device class '%s': release.\n", cd->class_id);
- kfree(cd->devt_attr);
- cd->devt_attr = NULL;
-
if (cd->release)
cd->release(cd);
else if (cls->release)
return print_dev_t(buf, class_dev->devt);
}
+static struct class_device_attribute class_devt_attr =
+ __ATTR(dev, S_IRUGO, show_dev, NULL);
+
static ssize_t store_uevent(struct class_device *class_dev,
const char *buf, size_t count)
{
return count;
}
+static struct class_device_attribute class_uevent_attr =
+ __ATTR(uevent, S_IWUSR, NULL, store_uevent);
+
void class_device_initialize(struct class_device *class_dev)
{
kobj_set_kset_s(class_dev, class_obj_subsys);
&parent_class->subsys.kobj, "subsystem");
if (error)
goto out3;
- class_dev->uevent_attr.attr.name = "uevent";
- class_dev->uevent_attr.attr.mode = S_IWUSR;
- class_dev->uevent_attr.attr.owner = parent_class->owner;
- class_dev->uevent_attr.store = store_uevent;
- error = class_device_create_file(class_dev, &class_dev->uevent_attr);
+
+ error = class_device_create_file(class_dev, &class_uevent_attr);
if (error)
goto out3;
if (MAJOR(class_dev->devt)) {
- struct class_device_attribute *attr;
- attr = kzalloc(sizeof(*attr), GFP_KERNEL);
- if (!attr) {
- error = -ENOMEM;
- goto out4;
- }
- attr->attr.name = "dev";
- attr->attr.mode = S_IRUGO;
- attr->attr.owner = parent_class->owner;
- attr->show = show_dev;
- error = class_device_create_file(class_dev, attr);
- if (error) {
- kfree(attr);
+ error = class_device_create_file(class_dev, &class_devt_attr);
+ if (error)
goto out4;
- }
-
- class_dev->devt_attr = attr;
}
error = class_device_add_attrs(class_dev);
out6:
class_device_remove_attrs(class_dev);
out5:
- if (class_dev->devt_attr)
- class_device_remove_file(class_dev, class_dev->devt_attr);
+ if (MAJOR(class_dev->devt))
+ class_device_remove_file(class_dev, &class_devt_attr);
out4:
- class_device_remove_file(class_dev, &class_dev->uevent_attr);
+ class_device_remove_file(class_dev, &class_uevent_attr);
out3:
kobject_del(&class_dev->kobj);
out2:
sysfs_remove_link(&class_dev->kobj, "device");
}
sysfs_remove_link(&class_dev->kobj, "subsystem");
- class_device_remove_file(class_dev, &class_dev->uevent_attr);
- if (class_dev->devt_attr)
- class_device_remove_file(class_dev, class_dev->devt_attr);
+ class_device_remove_file(class_dev, &class_uevent_attr);
+ if (MAJOR(class_dev->devt))
+ class_device_remove_file(class_dev, &class_devt_attr);
class_device_remove_attrs(class_dev);
class_device_remove_groups(class_dev);
return count;
}
+static struct device_attribute uevent_attr =
+ __ATTR(uevent, S_IRUGO | S_IWUSR, show_uevent, store_uevent);
+
static int device_add_attributes(struct device *dev,
struct device_attribute *attrs)
{
return print_dev_t(buf, dev->devt);
}
+static struct device_attribute devt_attr =
+ __ATTR(dev, S_IRUGO, show_dev, NULL);
+
/*
* devices_subsys - structure to be registered with kobject core.
*/
blocking_notifier_call_chain(&dev->bus->bus_notifier,
BUS_NOTIFY_ADD_DEVICE, dev);
- dev->uevent_attr.attr.name = "uevent";
- dev->uevent_attr.attr.mode = S_IRUGO | S_IWUSR;
- if (dev->driver)
- dev->uevent_attr.attr.owner = dev->driver->owner;
- dev->uevent_attr.store = store_uevent;
- dev->uevent_attr.show = show_uevent;
- error = device_create_file(dev, &dev->uevent_attr);
+ error = device_create_file(dev, &uevent_attr);
if (error)
goto attrError;
if (MAJOR(dev->devt)) {
- struct device_attribute *attr;
- attr = kzalloc(sizeof(*attr), GFP_KERNEL);
- if (!attr) {
- error = -ENOMEM;
- goto ueventattrError;
- }
- attr->attr.name = "dev";
- attr->attr.mode = S_IRUGO;
- if (dev->driver)
- attr->attr.owner = dev->driver->owner;
- attr->show = show_dev;
- error = device_create_file(dev, attr);
- if (error) {
- kfree(attr);
+ error = device_create_file(dev, &devt_attr);
+ if (error)
goto ueventattrError;
- }
-
- dev->devt_attr = attr;
}
if (dev->class) {
}
}
- if ((error = device_add_attrs(dev)))
+ error = device_add_attrs(dev);
+ if (error)
goto AttrsError;
- if ((error = device_pm_add(dev)))
+ error = device_pm_add(dev);
+ if (error)
goto PMError;
- if ((error = bus_add_device(dev)))
+ error = bus_add_device(dev);
+ if (error)
goto BusError;
kobject_uevent(&dev->kobj, KOBJ_ADD);
bus_attach_device(dev);
BUS_NOTIFY_DEL_DEVICE, dev);
device_remove_attrs(dev);
AttrsError:
- if (dev->devt_attr) {
- device_remove_file(dev, dev->devt_attr);
- kfree(dev->devt_attr);
- }
+ if (MAJOR(dev->devt))
+ device_remove_file(dev, &devt_attr);
if (dev->class) {
sysfs_remove_link(&dev->kobj, "subsystem");
}
}
ueventattrError:
- device_remove_file(dev, &dev->uevent_attr);
+ device_remove_file(dev, &uevent_attr);
attrError:
kobject_uevent(&dev->kobj, KOBJ_REMOVE);
kobject_del(&dev->kobj);
if (parent)
klist_del(&dev->knode_parent);
- if (dev->devt_attr) {
- device_remove_file(dev, dev->devt_attr);
- kfree(dev->devt_attr);
- }
+ if (MAJOR(dev->devt))
+ device_remove_file(dev, &devt_attr);
if (dev->class) {
sysfs_remove_link(&dev->kobj, "subsystem");
/* If this is not a "fake" compatible device, remove the
up(&dev->class->sem);
}
}
- device_remove_file(dev, &dev->uevent_attr);
+ device_remove_file(dev, &uevent_attr);
device_remove_attrs(dev);
bus_remove_device(dev);
return bus_for_each_dev(drv->bus, NULL, drv, __driver_attach);
}
-/**
- * device_release_driver - manually detach device from driver.
- * @dev: device.
- *
- * Manually detach device from driver.
- *
+/*
* __device_release_driver() must be called with @dev->sem held.
- * When called for a USB interface, @dev->parent->sem must be held
- * as well.
+ * When called for a USB interface, @dev->parent->sem must be held as well.
*/
-
static void __device_release_driver(struct device * dev)
{
struct device_driver * drv;
- drv = dev->driver;
+ drv = get_driver(dev->driver);
if (drv) {
- get_driver(drv);
driver_sysfs_remove(dev);
sysfs_remove_link(&dev->kobj, "driver");
klist_remove(&dev->knode_driver);
}
}
+/**
+ * device_release_driver - manually detach device from driver.
+ * @dev: device.
+ *
+ * Manually detach device from driver.
+ * When called for a USB interface, @dev->parent->sem must be held.
+ */
void device_release_driver(struct device * dev)
{
/*
#include <linux/device.h>
#include <linux/module.h>
+#include "base.h"
+
struct devres_node {
struct list_head entry;
dr_release_t release;
static DEVICE_ATTR(loading, 0644, firmware_loading_show, firmware_loading_store);
static ssize_t
-firmware_data_read(struct kobject *kobj,
+firmware_data_read(struct kobject *kobj, struct bin_attribute *bin_attr,
char *buffer, loff_t offset, size_t count)
{
struct device *dev = to_dev(kobj);
* the driver as a firmware image.
**/
static ssize_t
-firmware_data_write(struct kobject *kobj,
+firmware_data_write(struct kobject *kobj, struct bin_attribute *bin_attr,
char *buffer, loff_t offset, size_t count)
{
struct device *dev = to_dev(kobj);
}
static struct bin_attribute firmware_attr_data_tmpl = {
- .attr = {.name = "data", .mode = 0644, .owner = THIS_MODULE},
+ .attr = {.name = "data", .mode = 0644},
.size = 0,
.read = firmware_data_read,
.write = firmware_data_write,
*/
#include <linux/device.h>
+#include <linux/mutex.h>
+
#include "power.h"
LIST_HEAD(dpm_active);
LIST_HEAD(dpm_off);
LIST_HEAD(dpm_off_irq);
-DECLARE_MUTEX(dpm_sem);
-DECLARE_MUTEX(dpm_list_sem);
+DEFINE_MUTEX(dpm_mtx);
+DEFINE_MUTEX(dpm_list_mtx);
int (*platform_enable_wakeup)(struct device *dev, int is_on);
-
-/**
- * device_pm_set_parent - Specify power dependency.
- * @dev: Device who needs power.
- * @parent: Device that supplies power.
- *
- * This function is used to manually describe a power-dependency
- * relationship. It may be used to specify a transversal relationship
- * (where the power supplier is not the physical (or electrical)
- * ancestor of a specific device.
- * The effect of this is that the supplier will not be powered down
- * before the power dependent.
- */
-
-void device_pm_set_parent(struct device * dev, struct device * parent)
-{
- put_device(dev->power.pm_parent);
- dev->power.pm_parent = get_device(parent);
-}
-EXPORT_SYMBOL_GPL(device_pm_set_parent);
-
-int device_pm_add(struct device * dev)
+int device_pm_add(struct device *dev)
{
int error;
pr_debug("PM: Adding info for %s:%s\n",
dev->bus ? dev->bus->name : "No Bus",
kobject_name(&dev->kobj));
- down(&dpm_list_sem);
+ mutex_lock(&dpm_list_mtx);
list_add_tail(&dev->power.entry, &dpm_active);
- device_pm_set_parent(dev, dev->parent);
- if ((error = dpm_sysfs_add(dev)))
+ error = dpm_sysfs_add(dev);
+ if (error)
list_del(&dev->power.entry);
- up(&dpm_list_sem);
+ mutex_unlock(&dpm_list_mtx);
return error;
}
-void device_pm_remove(struct device * dev)
+void device_pm_remove(struct device *dev)
{
pr_debug("PM: Removing info for %s:%s\n",
dev->bus ? dev->bus->name : "No Bus",
kobject_name(&dev->kobj));
- down(&dpm_list_sem);
+ mutex_lock(&dpm_list_mtx);
dpm_sysfs_remove(dev);
- put_device(dev->power.pm_parent);
list_del_init(&dev->power.entry);
- up(&dpm_list_sem);
+ mutex_unlock(&dpm_list_mtx);
}
/*
* Used to synchronize global power management operations.
*/
-extern struct semaphore dpm_sem;
+extern struct mutex dpm_mtx;
/*
* Used to serialize changes to the dpm_* lists.
*/
-extern struct semaphore dpm_list_sem;
+extern struct mutex dpm_list_mtx;
/*
* The PM lists.
down(&dev->sem);
- if (dev->power.pm_parent
- && dev->power.pm_parent->power.power_state.event) {
- dev_err(dev, "PM: resume from %d, parent %s still %d\n",
- dev->power.power_state.event,
- dev->power.pm_parent->bus_id,
- dev->power.pm_parent->power.power_state.event);
- }
-
if (dev->bus && dev->bus->resume) {
dev_dbg(dev,"resuming\n");
error = dev->bus->resume(dev);
*/
void dpm_resume(void)
{
- down(&dpm_list_sem);
+ mutex_lock(&dpm_list_mtx);
while(!list_empty(&dpm_off)) {
struct list_head * entry = dpm_off.next;
struct device * dev = to_device(entry);
get_device(dev);
list_move_tail(entry, &dpm_active);
- up(&dpm_list_sem);
- if (!dev->power.prev_state.event)
- resume_device(dev);
- down(&dpm_list_sem);
+ mutex_unlock(&dpm_list_mtx);
+ resume_device(dev);
+ mutex_lock(&dpm_list_mtx);
put_device(dev);
}
- up(&dpm_list_sem);
+ mutex_unlock(&dpm_list_mtx);
}
void device_resume(void)
{
might_sleep();
- down(&dpm_sem);
+ mutex_lock(&dpm_mtx);
dpm_resume();
- up(&dpm_sem);
+ mutex_unlock(&dpm_mtx);
}
EXPORT_SYMBOL_GPL(device_resume);
void dpm_runtime_resume(struct device * dev)
{
- down(&dpm_sem);
+ mutex_lock(&dpm_mtx);
runtime_resume(dev);
- up(&dpm_sem);
+ mutex_unlock(&dpm_mtx);
}
EXPORT_SYMBOL(dpm_runtime_resume);
{
int error = 0;
- down(&dpm_sem);
+ mutex_lock(&dpm_mtx);
if (dev->power.power_state.event == state.event)
goto Done;
if (!(error = suspend_device(dev, state)))
dev->power.power_state = state;
Done:
- up(&dpm_sem);
+ mutex_unlock(&dpm_mtx);
return error;
}
EXPORT_SYMBOL(dpm_runtime_suspend);
*/
void dpm_set_power_state(struct device * dev, pm_message_t state)
{
- down(&dpm_sem);
+ mutex_lock(&dpm_mtx);
dev->power.power_state = state;
- up(&dpm_sem);
+ mutex_unlock(&dpm_mtx);
}
#endif /* 0 */
}
+static void
+suspend_device_dbg(struct device *dev, pm_message_t state, char *info)
+{
+ dev_dbg(dev, "%s%s%s\n", info, suspend_verb(state.event),
+ ((state.event == PM_EVENT_SUSPEND) && device_may_wakeup(dev)) ?
+ ", may wakeup" : "");
+}
+
/**
* suspend_device - Save state of one device.
* @dev: Device.
dev_dbg(dev, "PM: suspend %d-->%d\n",
dev->power.power_state.event, state.event);
}
- if (dev->power.pm_parent
- && dev->power.pm_parent->power.power_state.event) {
- dev_err(dev,
- "PM: suspend %d->%d, parent %s already %d\n",
- dev->power.power_state.event, state.event,
- dev->power.pm_parent->bus_id,
- dev->power.pm_parent->power.power_state.event);
- }
-
- dev->power.prev_state = dev->power.power_state;
- if (dev->class && dev->class->suspend && !dev->power.power_state.event) {
- dev_dbg(dev, "class %s%s\n",
- suspend_verb(state.event),
- ((state.event == PM_EVENT_SUSPEND)
- && device_may_wakeup(dev))
- ? ", may wakeup"
- : ""
- );
+ if (dev->class && dev->class->suspend) {
+ suspend_device_dbg(dev, state, "class ");
error = dev->class->suspend(dev, state);
suspend_report_result(dev->class->suspend, error);
}
- if (!error && dev->type && dev->type->suspend && !dev->power.power_state.event) {
- dev_dbg(dev, "%s%s\n",
- suspend_verb(state.event),
- ((state.event == PM_EVENT_SUSPEND)
- && device_may_wakeup(dev))
- ? ", may wakeup"
- : ""
- );
+ if (!error && dev->type && dev->type->suspend) {
+ suspend_device_dbg(dev, state, "type ");
error = dev->type->suspend(dev, state);
suspend_report_result(dev->type->suspend, error);
}
- if (!error && dev->bus && dev->bus->suspend && !dev->power.power_state.event) {
- dev_dbg(dev, "%s%s\n",
- suspend_verb(state.event),
- ((state.event == PM_EVENT_SUSPEND)
- && device_may_wakeup(dev))
- ? ", may wakeup"
- : ""
- );
+ if (!error && dev->bus && dev->bus->suspend) {
+ suspend_device_dbg(dev, state, "");
error = dev->bus->suspend(dev, state);
suspend_report_result(dev->bus->suspend, error);
}
/*
* This is called with interrupts off, only a single CPU
- * running. We can't do down() on a semaphore (and we don't
+ * running. We can't acquire a mutex or semaphore (and we don't
* need the protection)
*/
static int suspend_device_late(struct device *dev, pm_message_t state)
{
int error = 0;
- if (dev->bus && dev->bus->suspend_late && !dev->power.power_state.event) {
- dev_dbg(dev, "LATE %s%s\n",
- suspend_verb(state.event),
- ((state.event == PM_EVENT_SUSPEND)
- && device_may_wakeup(dev))
- ? ", may wakeup"
- : ""
- );
+ if (dev->bus && dev->bus->suspend_late) {
+ suspend_device_dbg(dev, state, "LATE ");
error = dev->bus->suspend_late(dev, state);
suspend_report_result(dev->bus->suspend_late, error);
}
int error = 0;
might_sleep();
- down(&dpm_sem);
- down(&dpm_list_sem);
+ mutex_lock(&dpm_mtx);
+ mutex_lock(&dpm_list_mtx);
while (!list_empty(&dpm_active) && error == 0) {
struct list_head * entry = dpm_active.prev;
struct device * dev = to_device(entry);
get_device(dev);
- up(&dpm_list_sem);
+ mutex_unlock(&dpm_list_mtx);
error = suspend_device(dev, state);
- down(&dpm_list_sem);
+ mutex_lock(&dpm_list_mtx);
/* Check if the device got removed */
if (!list_empty(&dev->power.entry)) {
error == -EAGAIN ? " (please convert to suspend_late)" : "");
put_device(dev);
}
- up(&dpm_list_sem);
+ mutex_unlock(&dpm_list_mtx);
if (error)
dpm_resume();
- up(&dpm_sem);
+ mutex_unlock(&dpm_mtx);
return error;
}
#include <linux/string.h>
#include <linux/pm.h>
#include <linux/device.h>
-#include <asm/semaphore.h>
+#include <linux/mutex.h>
#include "base.h"
static LIST_HEAD(sysdev_drivers);
-static DECLARE_MUTEX(sysdev_drivers_lock);
+static DEFINE_MUTEX(sysdev_drivers_lock);
/**
* sysdev_driver_register - Register auxillary driver
int sysdev_driver_register(struct sysdev_class * cls,
struct sysdev_driver * drv)
{
- down(&sysdev_drivers_lock);
+ mutex_lock(&sysdev_drivers_lock);
if (cls && kset_get(&cls->kset)) {
list_add_tail(&drv->entry, &cls->drivers);
}
} else
list_add_tail(&drv->entry, &sysdev_drivers);
- up(&sysdev_drivers_lock);
+ mutex_unlock(&sysdev_drivers_lock);
return 0;
}
void sysdev_driver_unregister(struct sysdev_class * cls,
struct sysdev_driver * drv)
{
- down(&sysdev_drivers_lock);
+ mutex_lock(&sysdev_drivers_lock);
list_del_init(&drv->entry);
if (cls) {
if (drv->remove) {
}
kset_put(&cls->kset);
}
- up(&sysdev_drivers_lock);
+ mutex_unlock(&sysdev_drivers_lock);
}
EXPORT_SYMBOL_GPL(sysdev_driver_register);
if (!error) {
struct sysdev_driver * drv;
- down(&sysdev_drivers_lock);
+ mutex_lock(&sysdev_drivers_lock);
/* Generic notification is implicit, because it's that
* code that should have called us.
*/
if (drv->add)
drv->add(sysdev);
}
- up(&sysdev_drivers_lock);
+ mutex_unlock(&sysdev_drivers_lock);
}
return error;
}
{
struct sysdev_driver * drv;
- down(&sysdev_drivers_lock);
+ mutex_lock(&sysdev_drivers_lock);
list_for_each_entry(drv, &sysdev_drivers, entry) {
if (drv->remove)
drv->remove(sysdev);
if (drv->remove)
drv->remove(sysdev);
}
- up(&sysdev_drivers_lock);
+ mutex_unlock(&sysdev_drivers_lock);
kobject_unregister(&sysdev->kobj);
}
pr_debug("Shutting Down System Devices\n");
- down(&sysdev_drivers_lock);
+ mutex_lock(&sysdev_drivers_lock);
list_for_each_entry_reverse(cls, &system_subsys.list,
kset.kobj.entry) {
struct sys_device * sysdev;
cls->shutdown(sysdev);
}
}
- up(&sysdev_drivers_lock);
+ mutex_unlock(&sysdev_drivers_lock);
}
static void __sysdev_resume(struct sys_device *dev)
**********************************************************/
#define DEF_ATTR(_obj,_name,_mode) \
- static struct attribute _obj = { \
- .name = _name, .owner = THIS_MODULE, .mode = _mode }
+ static struct attribute _obj = { .name = _name, .mode = _mode }
/**********************************************************
/sys/class/pktcdvd/pktcdvd[0-7]/
int err;
bmc->device_id_attr.attr.name = "device_id";
- bmc->device_id_attr.attr.owner = THIS_MODULE;
bmc->device_id_attr.attr.mode = S_IRUGO;
bmc->device_id_attr.show = device_id_show;
bmc->provides_dev_sdrs_attr.attr.name = "provides_device_sdrs";
- bmc->provides_dev_sdrs_attr.attr.owner = THIS_MODULE;
bmc->provides_dev_sdrs_attr.attr.mode = S_IRUGO;
bmc->provides_dev_sdrs_attr.show = provides_dev_sdrs_show;
bmc->revision_attr.attr.name = "revision";
- bmc->revision_attr.attr.owner = THIS_MODULE;
bmc->revision_attr.attr.mode = S_IRUGO;
bmc->revision_attr.show = revision_show;
bmc->firmware_rev_attr.attr.name = "firmware_revision";
- bmc->firmware_rev_attr.attr.owner = THIS_MODULE;
bmc->firmware_rev_attr.attr.mode = S_IRUGO;
bmc->firmware_rev_attr.show = firmware_rev_show;
bmc->version_attr.attr.name = "ipmi_version";
- bmc->version_attr.attr.owner = THIS_MODULE;
bmc->version_attr.attr.mode = S_IRUGO;
bmc->version_attr.show = ipmi_version_show;
bmc->add_dev_support_attr.attr.name = "additional_device_support";
- bmc->add_dev_support_attr.attr.owner = THIS_MODULE;
bmc->add_dev_support_attr.attr.mode = S_IRUGO;
bmc->add_dev_support_attr.show = add_dev_support_show;
bmc->manufacturer_id_attr.attr.name = "manufacturer_id";
- bmc->manufacturer_id_attr.attr.owner = THIS_MODULE;
bmc->manufacturer_id_attr.attr.mode = S_IRUGO;
bmc->manufacturer_id_attr.show = manufacturer_id_show;
bmc->product_id_attr.attr.name = "product_id";
- bmc->product_id_attr.attr.owner = THIS_MODULE;
bmc->product_id_attr.attr.mode = S_IRUGO;
bmc->product_id_attr.show = product_id_show;
bmc->guid_attr.attr.name = "guid";
- bmc->guid_attr.attr.owner = THIS_MODULE;
bmc->guid_attr.attr.mode = S_IRUGO;
bmc->guid_attr.show = guid_show;
bmc->aux_firmware_rev_attr.attr.name = "aux_firmware_revision";
- bmc->aux_firmware_rev_attr.attr.owner = THIS_MODULE;
bmc->aux_firmware_rev_attr.attr.mode = S_IRUGO;
bmc->aux_firmware_rev_attr.show = aux_firmware_rev_show;
#define CPUFREQ_STATDEVICE_ATTR(_name,_mode,_show) \
static struct freq_attr _attr_##_name = {\
- .attr = {.name = __stringify(_name), .owner = THIS_MODULE, \
- .mode = _mode, }, \
+ .attr = {.name = __stringify(_name), .mode = _mode, }, \
.show = _show,\
};
static struct freq_attr freq_attr_scaling_setspeed =
{
- .attr = { .name = "scaling_setspeed", .mode = 0644, .owner = THIS_MODULE },
+ .attr = { .name = "scaling_setspeed", .mode = 0644 },
.show = show_speed,
.store = store_speed,
};
struct freq_attr cpufreq_freq_attr_scaling_available_freqs = {
.attr = { .name = "scaling_available_frequencies",
.mode = 0444,
- .owner=THIS_MODULE
},
.show = show_available_freqs,
};
Say Y or M here to enable the driver for use by Dell systems
management software such as Dell OpenManage.
+config DMIID
+ bool "Export DMI identification via sysfs to userspace"
+ depends on DMI
+ default y
+ help
+ Say Y here if you want to query SMBIOS/DMI system identification
+ information from userspace through /sys/class/dmi/id/ or if you want
+ DMI-based module auto-loading.
+
endmenu
obj-$(CONFIG_EFI_PCDP) += pcdp.o
obj-$(CONFIG_DELL_RBU) += dell_rbu.o
obj-$(CONFIG_DCDBAS) += dcdbas.o
+obj-$(CONFIG_DMIID) += dmi-id.o
return count;
}
-static ssize_t smi_data_read(struct kobject *kobj, char *buf, loff_t pos,
- size_t count)
+static ssize_t smi_data_read(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t pos, size_t count)
{
size_t max_read;
ssize_t ret;
return ret;
}
-static ssize_t smi_data_write(struct kobject *kobj, char *buf, loff_t pos,
- size_t count)
+static ssize_t smi_data_write(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t pos, size_t count)
{
ssize_t ret;
#define DCDBAS_BIN_ATTR_RW(_name) \
struct bin_attribute bin_attr_##_name = { \
.attr = { .name = __stringify(_name), \
- .mode = 0600, \
- .owner = THIS_MODULE }, \
+ .mode = 0600 }, \
.read = _name##_read, \
.write = _name##_write, \
}
return ret_count;
}
-static ssize_t read_rbu_data(struct kobject *kobj, char *buffer,
- loff_t pos, size_t count)
+static ssize_t read_rbu_data(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buffer, loff_t pos, size_t count)
{
ssize_t ret_count = 0;
spin_unlock(&rbu_data.lock);
}
-static ssize_t read_rbu_image_type(struct kobject *kobj, char *buffer,
- loff_t pos, size_t count)
+static ssize_t read_rbu_image_type(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buffer, loff_t pos, size_t count)
{
int size = 0;
if (!pos)
return size;
}
-static ssize_t write_rbu_image_type(struct kobject *kobj, char *buffer,
- loff_t pos, size_t count)
+static ssize_t write_rbu_image_type(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buffer, loff_t pos, size_t count)
{
int rc = count;
int req_firm_rc = 0;
return rc;
}
-static ssize_t read_rbu_packet_size(struct kobject *kobj, char *buffer,
- loff_t pos, size_t count)
+static ssize_t read_rbu_packet_size(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buffer, loff_t pos, size_t count)
{
int size = 0;
if (!pos) {
return size;
}
-static ssize_t write_rbu_packet_size(struct kobject *kobj, char *buffer,
- loff_t pos, size_t count)
+static ssize_t write_rbu_packet_size(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buffer, loff_t pos, size_t count)
{
unsigned long temp;
spin_lock(&rbu_data.lock);
}
static struct bin_attribute rbu_data_attr = {
- .attr = {.name = "data",.owner = THIS_MODULE,.mode = 0444},
+ .attr = {.name = "data", .mode = 0444},
.read = read_rbu_data,
};
static struct bin_attribute rbu_image_type_attr = {
- .attr = {.name = "image_type",.owner = THIS_MODULE,.mode = 0644},
+ .attr = {.name = "image_type", .mode = 0644},
.read = read_rbu_image_type,
.write = write_rbu_image_type,
};
static struct bin_attribute rbu_packet_size_attr = {
- .attr = {.name = "packet_size",.owner = THIS_MODULE,.mode = 0644},
+ .attr = {.name = "packet_size", .mode = 0644},
.read = read_rbu_packet_size,
.write = write_rbu_packet_size,
};
--- /dev/null
+/*
+ * Export SMBIOS/DMI info via sysfs to userspace
+ *
+ * Copyright 2007, Lennart Poettering
+ *
+ * Licensed under GPLv2
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/dmi.h>
+#include <linux/device.h>
+#include <linux/autoconf.h>
+
+#define DEFINE_DMI_ATTR(_name, _mode, _show) \
+static struct device_attribute sys_dmi_##_name##_attr = \
+ __ATTR(_name, _mode, _show, NULL);
+
+#define DEFINE_DMI_ATTR_WITH_SHOW(_name, _mode, _field) \
+static ssize_t sys_dmi_##_name##_show(struct device *dev, \
+ struct device_attribute *attr, \
+ char *page) \
+{ \
+ ssize_t len; \
+ len = scnprintf(page, PAGE_SIZE, "%s\n", dmi_get_system_info(_field)); \
+ page[len-1] = '\n'; \
+ return len; \
+} \
+DEFINE_DMI_ATTR(_name, _mode, sys_dmi_##_name##_show);
+
+DEFINE_DMI_ATTR_WITH_SHOW(bios_vendor, 0444, DMI_BIOS_VENDOR);
+DEFINE_DMI_ATTR_WITH_SHOW(bios_version, 0444, DMI_BIOS_VERSION);
+DEFINE_DMI_ATTR_WITH_SHOW(bios_date, 0444, DMI_BIOS_DATE);
+DEFINE_DMI_ATTR_WITH_SHOW(sys_vendor, 0444, DMI_SYS_VENDOR);
+DEFINE_DMI_ATTR_WITH_SHOW(product_name, 0444, DMI_PRODUCT_NAME);
+DEFINE_DMI_ATTR_WITH_SHOW(product_version, 0444, DMI_PRODUCT_VERSION);
+DEFINE_DMI_ATTR_WITH_SHOW(product_serial, 0400, DMI_PRODUCT_SERIAL);
+DEFINE_DMI_ATTR_WITH_SHOW(product_uuid, 0400, DMI_PRODUCT_UUID);
+DEFINE_DMI_ATTR_WITH_SHOW(board_vendor, 0444, DMI_BOARD_VENDOR);
+DEFINE_DMI_ATTR_WITH_SHOW(board_name, 0444, DMI_BOARD_NAME);
+DEFINE_DMI_ATTR_WITH_SHOW(board_version, 0444, DMI_BOARD_VERSION);
+DEFINE_DMI_ATTR_WITH_SHOW(board_serial, 0400, DMI_BOARD_SERIAL);
+DEFINE_DMI_ATTR_WITH_SHOW(board_asset_tag, 0444, DMI_BOARD_ASSET_TAG);
+DEFINE_DMI_ATTR_WITH_SHOW(chassis_vendor, 0444, DMI_CHASSIS_VENDOR);
+DEFINE_DMI_ATTR_WITH_SHOW(chassis_type, 0444, DMI_CHASSIS_TYPE);
+DEFINE_DMI_ATTR_WITH_SHOW(chassis_version, 0444, DMI_CHASSIS_VERSION);
+DEFINE_DMI_ATTR_WITH_SHOW(chassis_serial, 0400, DMI_CHASSIS_SERIAL);
+DEFINE_DMI_ATTR_WITH_SHOW(chassis_asset_tag, 0444, DMI_CHASSIS_ASSET_TAG);
+
+static void ascii_filter(char *d, const char *s)
+{
+ /* Filter out characters we don't want to see in the modalias string */
+ for (; *s; s++)
+ if (*s > ' ' && *s < 127 && *s != ':')
+ *(d++) = *s;
+
+ *d = 0;
+}
+
+static ssize_t get_modalias(char *buffer, size_t buffer_size)
+{
+ static const struct mafield {
+ const char *prefix;
+ int field;
+ } fields[] = {
+ { "bvn", DMI_BIOS_VENDOR },
+ { "bvr", DMI_BIOS_VERSION },
+ { "bd", DMI_BIOS_DATE },
+ { "svn", DMI_SYS_VENDOR },
+ { "pn", DMI_PRODUCT_NAME },
+ { "pvr", DMI_PRODUCT_VERSION },
+ { "rvn", DMI_BOARD_VENDOR },
+ { "rn", DMI_BOARD_NAME },
+ { "rvr", DMI_BOARD_VERSION },
+ { "cvn", DMI_CHASSIS_VENDOR },
+ { "ct", DMI_CHASSIS_TYPE },
+ { "cvr", DMI_CHASSIS_VERSION },
+ { NULL, DMI_NONE }
+ };
+
+ ssize_t l, left;
+ char *p;
+ const struct mafield *f;
+
+ strcpy(buffer, "dmi");
+ p = buffer + 3; left = buffer_size - 4;
+
+ for (f = fields; f->prefix && left > 0; f++) {
+ const char *c;
+ char *t;
+
+ c = dmi_get_system_info(f->field);
+ if (!c)
+ continue;
+
+ t = kmalloc(strlen(c) + 1, GFP_KERNEL);
+ if (!t)
+ break;
+ ascii_filter(t, c);
+ l = scnprintf(p, left, ":%s%s", f->prefix, t);
+ kfree(t);
+
+ p += l;
+ left -= l;
+ }
+
+ p[0] = ':';
+ p[1] = 0;
+
+ return p - buffer + 1;
+}
+
+static ssize_t sys_dmi_modalias_show(struct device *dev,
+ struct device_attribute *attr, char *page)
+{
+ ssize_t r;
+ r = get_modalias(page, PAGE_SIZE-1);
+ page[r] = '\n';
+ page[r+1] = 0;
+ return r+1;
+}
+
+DEFINE_DMI_ATTR(modalias, 0444, sys_dmi_modalias_show);
+
+static struct attribute *sys_dmi_attributes[DMI_STRING_MAX+2];
+
+static struct attribute_group sys_dmi_attribute_group = {
+ .attrs = sys_dmi_attributes,
+};
+
+static struct attribute_group* sys_dmi_attribute_groups[] = {
+ &sys_dmi_attribute_group,
+ NULL
+};
+
+static int dmi_dev_uevent(struct device *dev, char **envp,
+ int num_envp, char *buffer, int buffer_size)
+{
+ strcpy(buffer, "MODALIAS=");
+ get_modalias(buffer+9, buffer_size-9);
+ envp[0] = buffer;
+ envp[1] = NULL;
+
+ return 0;
+}
+
+static struct class dmi_class = {
+ .name = "dmi",
+ .dev_release = (void(*)(struct device *)) kfree,
+ .dev_uevent = dmi_dev_uevent,
+};
+
+static struct device *dmi_dev;
+
+/* Initialization */
+
+#define ADD_DMI_ATTR(_name, _field) \
+ if (dmi_get_system_info(_field)) \
+ sys_dmi_attributes[i++] = & sys_dmi_##_name##_attr.attr;
+
+extern int dmi_available;
+
+static int __init dmi_id_init(void)
+{
+ int ret, i;
+
+ if (!dmi_available)
+ return -ENODEV;
+
+ /* Not necessarily all DMI fields are available on all
+ * systems, hence let's built an attribute table of just
+ * what's available */
+ i = 0;
+ ADD_DMI_ATTR(bios_vendor, DMI_BIOS_VENDOR);
+ ADD_DMI_ATTR(bios_version, DMI_BIOS_VERSION);
+ ADD_DMI_ATTR(bios_date, DMI_BIOS_DATE);
+ ADD_DMI_ATTR(sys_vendor, DMI_SYS_VENDOR);
+ ADD_DMI_ATTR(product_name, DMI_PRODUCT_NAME);
+ ADD_DMI_ATTR(product_version, DMI_PRODUCT_VERSION);
+ ADD_DMI_ATTR(product_serial, DMI_PRODUCT_SERIAL);
+ ADD_DMI_ATTR(product_uuid, DMI_PRODUCT_UUID);
+ ADD_DMI_ATTR(board_vendor, DMI_BOARD_VENDOR);
+ ADD_DMI_ATTR(board_name, DMI_BOARD_NAME);
+ ADD_DMI_ATTR(board_version, DMI_BOARD_VERSION);
+ ADD_DMI_ATTR(board_serial, DMI_BOARD_SERIAL);
+ ADD_DMI_ATTR(board_asset_tag, DMI_BOARD_ASSET_TAG);
+ ADD_DMI_ATTR(chassis_vendor, DMI_CHASSIS_VENDOR);
+ ADD_DMI_ATTR(chassis_type, DMI_CHASSIS_TYPE);
+ ADD_DMI_ATTR(chassis_version, DMI_CHASSIS_VERSION);
+ ADD_DMI_ATTR(chassis_serial, DMI_CHASSIS_SERIAL);
+ ADD_DMI_ATTR(chassis_asset_tag, DMI_CHASSIS_ASSET_TAG);
+ sys_dmi_attributes[i++] = &sys_dmi_modalias_attr.attr;
+
+ ret = class_register(&dmi_class);
+ if (ret)
+ return ret;
+
+ dmi_dev = kzalloc(sizeof(*dmi_dev), GFP_KERNEL);
+ if (!dmi_dev) {
+ ret = -ENOMEM;
+ goto fail_class_unregister;
+ }
+
+ dmi_dev->class = &dmi_class;
+ strcpy(dmi_dev->bus_id, "id");
+ dmi_dev->groups = sys_dmi_attribute_groups;
+
+ ret = device_register(dmi_dev);
+ if (ret)
+ goto fail_class_unregister;
+
+ return 0;
+
+fail_class_unregister:
+
+ class_unregister(&dmi_class);
+
+ return ret;
+}
+
+arch_initcall(dmi_id_init);
static char *dmi_ident[DMI_STRING_MAX];
static LIST_HEAD(dmi_devices);
+int dmi_available;
/*
* Save a DMI string
dmi_ident[slot] = p;
}
+static void __init dmi_save_uuid(struct dmi_header *dm, int slot, int index)
+{
+ u8 *d = (u8*) dm + index;
+ char *s;
+ int is_ff = 1, is_00 = 1, i;
+
+ if (dmi_ident[slot])
+ return;
+
+ for (i = 0; i < 16 && (is_ff || is_00); i++) {
+ if(d[i] != 0x00) is_ff = 0;
+ if(d[i] != 0xFF) is_00 = 0;
+ }
+
+ if (is_ff || is_00)
+ return;
+
+ s = dmi_alloc(16*2+4+1);
+ if (!s)
+ return;
+
+ sprintf(s,
+ "%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X",
+ d[0], d[1], d[2], d[3], d[4], d[5], d[6], d[7],
+ d[8], d[9], d[10], d[11], d[12], d[13], d[14], d[15]);
+
+ dmi_ident[slot] = s;
+}
+
+static void __init dmi_save_type(struct dmi_header *dm, int slot, int index)
+{
+ u8 *d = (u8*) dm + index;
+ char *s;
+
+ if (dmi_ident[slot])
+ return;
+
+ s = dmi_alloc(4);
+ if (!s)
+ return;
+
+ sprintf(s, "%u", *d & 0x7F);
+ dmi_ident[slot] = s;
+}
+
static void __init dmi_save_devices(struct dmi_header *dm)
{
int i, count = (dm->length - sizeof(struct dmi_header)) / 2;
dmi_save_ident(dm, DMI_PRODUCT_NAME, 5);
dmi_save_ident(dm, DMI_PRODUCT_VERSION, 6);
dmi_save_ident(dm, DMI_PRODUCT_SERIAL, 7);
+ dmi_save_uuid(dm, DMI_PRODUCT_UUID, 8);
break;
case 2: /* Base Board Information */
dmi_save_ident(dm, DMI_BOARD_VENDOR, 4);
dmi_save_ident(dm, DMI_BOARD_NAME, 5);
dmi_save_ident(dm, DMI_BOARD_VERSION, 6);
+ dmi_save_ident(dm, DMI_BOARD_SERIAL, 7);
+ dmi_save_ident(dm, DMI_BOARD_ASSET_TAG, 8);
+ break;
+ case 3: /* Chassis Information */
+ dmi_save_ident(dm, DMI_CHASSIS_VENDOR, 4);
+ dmi_save_type(dm, DMI_CHASSIS_TYPE, 5);
+ dmi_save_ident(dm, DMI_CHASSIS_VERSION, 6);
+ dmi_save_ident(dm, DMI_CHASSIS_SERIAL, 7);
+ dmi_save_ident(dm, DMI_CHASSIS_ASSET_TAG, 8);
break;
case 10: /* Onboard Devices Information */
dmi_save_devices(dm);
if (efi.smbios == EFI_INVALID_TABLE_ADDR)
goto out;
- /* This is called as a core_initcall() because it isn't
- * needed during early boot. This also means we can
- * iounmap the space when we're done with it.
- */
+ /* This is called as a core_initcall() because it isn't
+ * needed during early boot. This also means we can
+ * iounmap the space when we're done with it.
+ */
p = dmi_ioremap(efi.smbios, 32);
if (p == NULL)
goto out;
rc = dmi_present(p + 0x10); /* offset of _DMI_ string */
dmi_iounmap(p, 32);
- if (!rc)
+ if (!rc) {
+ dmi_available = 1;
return;
+ }
}
else {
/*
for (q = p; q < p + 0x10000; q += 16) {
rc = dmi_present(q);
- if (!rc)
+ if (!rc) {
+ dmi_available = 1;
return;
+ }
}
}
out: printk(KERN_INFO "DMI not present or invalid.\n");
return year;
}
+
#define EDD_DEVICE_ATTR(_name,_mode,_show,_test) \
struct edd_attribute edd_attr_##_name = { \
- .attr = {.name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE }, \
+ .attr = {.name = __stringify(_name), .mode = _mode }, \
.show = _show, \
.test = _test, \
};
#define EFI_ATTR(_name, _mode, _show, _store) \
struct subsys_attribute efi_attr_##_name = { \
- .attr = {.name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE}, \
+ .attr = {.name = __stringify(_name), .mode = _mode}, \
.show = _show, \
.store = _store, \
};
#define EFIVAR_ATTR(_name, _mode, _show, _store) \
struct efivar_attribute efivar_attr_##_name = { \
- .attr = {.name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE}, \
+ .attr = {.name = __stringify(_name), .mode = _mode}, \
.show = _show, \
.store = _store, \
};
#define VAR_SUBSYS_ATTR(_name, _mode, _show, _store) \
struct subsys_attribute var_subsys_attr_##_name = { \
- .attr = {.name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE}, \
+ .attr = {.name = __stringify(_name), .mode = _mode}, \
.show = _show, \
.store = _store, \
};
mutex_unlock(&data->update_lock);
}
-static ssize_t eeprom_read(struct kobject *kobj, char *buf, loff_t off, size_t count)
+static ssize_t eeprom_read(struct kobject *kobj, struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct i2c_client *client = to_i2c_client(container_of(kobj, struct device, kobj));
struct eeprom_data *data = i2c_get_clientdata(client);
.attr = {
.name = "eeprom",
.mode = S_IRUGO,
- .owner = THIS_MODULE,
},
.size = EEPROM_SIZE,
.read = eeprom_read,
mutex_unlock(&data->update_lock);
}
-static ssize_t max6875_read(struct kobject *kobj, char *buf, loff_t off,
- size_t count)
+static ssize_t max6875_read(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct i2c_client *client = kobj_to_i2c_client(kobj);
struct max6875_data *data = i2c_get_clientdata(client);
.attr = {
.name = "eeprom",
.mode = S_IRUGO,
- .owner = THIS_MODULE,
},
.size = USER_EEPROM_SIZE,
.read = max6875_read,
element->attr.attr.name = element->name;
element->attr.attr.mode = S_IRUGO;
- element->attr.attr.owner = THIS_MODULE;
element->attr.show = show;
element->index = i;
.attr = { \
.name = __stringify(_name), \
.mode = _mode, \
- .owner = THIS_MODULE, \
}, \
.show = psmouse_attr_show_helper, \
.store = psmouse_attr_set_helper, \
list_add(&new_ct->link, &wf_controls);
new_ct->attr.attr.name = new_ct->name;
- new_ct->attr.attr.owner = THIS_MODULE;
new_ct->attr.attr.mode = 0644;
new_ct->attr.show = wf_show_control;
new_ct->attr.store = wf_store_control;
list_add(&new_sr->link, &wf_sensors);
new_sr->attr.attr.name = new_sr->name;
- new_sr->attr.attr.owner = THIS_MODULE;
new_sr->attr.attr.mode = 0444;
new_sr->attr.show = wf_show_sensor;
new_sr->attr.store = NULL;
struct device_attribute dev_attr_##_name = { \
.attr = { \
.name = __stringify(_name), \
- .mode = 0, \
- .owner = THIS_MODULE }, \
+ .mode = 0 }, \
.show = NULL, \
.store = NULL, \
}
* msi-laptop.c - MSI S270 laptop support. This laptop is sold under
* various brands, including "Cytron/TCM/Medion/Tchibo MD96100".
*
+ * Driver also supports S271, S420 models.
+ *
* This driver exports a few files in /sys/devices/platform/msi-laptop-pf/:
*
* lcd_level - Screen brightness: contains a single integer in the
/* Initialization */
+static int dmi_check_cb(struct dmi_system_id *id)
+{
+ printk("msi-laptop: Identified laptop model '%s'.\n", id->ident);
+ return 0;
+}
+
static struct dmi_system_id __initdata msi_dmi_table[] = {
{
.ident = "MSI S270",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "MICRO-STAR INT'L CO.,LTD"),
DMI_MATCH(DMI_PRODUCT_NAME, "MS-1013"),
- }
+ DMI_MATCH(DMI_PRODUCT_VERSION, "0131"),
+ DMI_MATCH(DMI_CHASSIS_VENDOR, "MICRO-STAR INT'L CO.,LTD")
+ },
+ .callback = dmi_check_cb
+ },
+ {
+ .ident = "MSI S271",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Micro-Star International"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "MS-1058"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "0581"),
+ DMI_MATCH(DMI_BOARD_NAME, "MS-1058")
+ },
+ .callback = dmi_check_cb
+ },
+ {
+ .ident = "MSI S420",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Micro-Star International"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "MS-1412"),
+ DMI_MATCH(DMI_BOARD_VENDOR, "MSI"),
+ DMI_MATCH(DMI_BOARD_NAME, "MS-1412")
+ },
+ .callback = dmi_check_cb
},
{
.ident = "Medion MD96100",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "NOTEBOOK"),
DMI_MATCH(DMI_PRODUCT_NAME, "SAM2000"),
- }
+ DMI_MATCH(DMI_PRODUCT_VERSION, "0131"),
+ DMI_MATCH(DMI_CHASSIS_VENDOR, "MICRO-STAR INT'L CO.,LTD")
+ },
+ .callback = dmi_check_cb
},
{ }
};
-
static int __init msi_init(void)
{
int ret;
MODULE_DESCRIPTION("MSI Laptop Support");
MODULE_VERSION(MSI_DRIVER_VERSION);
MODULE_LICENSE("GPL");
+
+MODULE_ALIAS("dmi:*:svnMICRO-STARINT'LCO.,LTD:pnMS-1013:pvr0131*:cvnMICRO-STARINT'LCO.,LTD:ct10:*");
+MODULE_ALIAS("dmi:*:svnMicro-StarInternational:pnMS-1058:pvr0581:rvnMSI:rnMS-1058:*:ct10:*");
+MODULE_ALIAS("dmi:*:svnMicro-StarInternational:pnMS-1412:*:rvnMSI:rnMS-1412:*:cvnMICRO-STARINT'LCO.,LTD:ct10:*");
+MODULE_ALIAS("dmi:*:svnNOTEBOOK:pnSAM2000:pvr0131*:cvnMICRO-STARINT'LCO.,LTD:ct10:*");
#define ATTR(_name, _mode) \
struct attribute veth_##_name##_attr = { \
- .name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE \
+ .name = __stringify(_name), .mode = _mode, \
};
static ATTR(active, 0644);
#define PDCS_ATTR(_name, _mode, _show, _store) \
struct subsys_attribute pdcs_attr_##_name = { \
- .attr = {.name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE}, \
+ .attr = {.name = __stringify(_name), .mode = _mode}, \
.show = _show, \
.store = _store, \
};
#define PATHS_ATTR(_name, _mode, _show, _store) \
struct pdcspath_attribute paths_attr_##_name = { \
- .attr = {.name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE}, \
+ .attr = {.name = __stringify(_name), .mode = _mode}, \
.show = _show, \
.store = _store, \
};
static void ibm_handle_events(acpi_handle handle, u32 event, void *context);
static int ibm_get_table_from_acpi(char **bufp);
static ssize_t ibm_read_apci_table(struct kobject *kobj,
- char *buffer, loff_t pos, size_t size);
+ struct bin_attribute *bin_attr,
+ char *buffer, loff_t pos, size_t size);
static acpi_status __init ibm_find_acpi_device(acpi_handle handle,
u32 lvl, void *context, void **rv);
static int __init ibm_acpiphp_init(void);
static struct bin_attribute ibm_apci_table_attr = {
.attr = {
.name = "apci_table",
- .owner = THIS_MODULE,
.mode = S_IRUGO,
},
.read = ibm_read_apci_table,
* our solution is to only allow reading the table in all at once
**/
static ssize_t ibm_read_apci_table(struct kobject *kobj,
- char *buffer, loff_t pos, size_t size)
+ struct bin_attribute *bin_attr,
+ char *buffer, loff_t pos, size_t size)
{
int bytes_read = -EINVAL;
char *table = NULL;
};
static ssize_t
-pci_read_config(struct kobject *kobj, char *buf, loff_t off, size_t count)
+pci_read_config(struct kobject *kobj, struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj));
unsigned int size = 64;
}
static ssize_t
-pci_write_config(struct kobject *kobj, char *buf, loff_t off, size_t count)
+pci_write_config(struct kobject *kobj, struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj));
unsigned int size = count;
* callback routine (pci_legacy_read).
*/
ssize_t
-pci_read_legacy_io(struct kobject *kobj, char *buf, loff_t off, size_t count)
+pci_read_legacy_io(struct kobject *kobj, struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct pci_bus *bus = to_pci_bus(container_of(kobj,
struct class_device,
* callback routine (pci_legacy_write).
*/
ssize_t
-pci_write_legacy_io(struct kobject *kobj, char *buf, loff_t off, size_t count)
+pci_write_legacy_io(struct kobject *kobj, struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct pci_bus *bus = to_pci_bus(container_of(kobj,
struct class_device,
sprintf(res_attr_name, "resource%d", i);
res_attr->attr.name = res_attr_name;
res_attr->attr.mode = S_IRUSR | S_IWUSR;
- res_attr->attr.owner = THIS_MODULE;
res_attr->size = pci_resource_len(pdev, i);
res_attr->mmap = pci_mmap_resource;
res_attr->private = &pdev->resource[i];
* writing anything except 0 enables it
*/
static ssize_t
-pci_write_rom(struct kobject *kobj, char *buf, loff_t off, size_t count)
+pci_write_rom(struct kobject *kobj, struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj));
* device corresponding to @kobj.
*/
static ssize_t
-pci_read_rom(struct kobject *kobj, char *buf, loff_t off, size_t count)
+pci_read_rom(struct kobject *kobj, struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj));
void __iomem *rom;
.attr = {
.name = "config",
.mode = S_IRUGO | S_IWUSR,
- .owner = THIS_MODULE,
},
.size = 256,
.read = pci_read_config,
.attr = {
.name = "config",
.mode = S_IRUGO | S_IWUSR,
- .owner = THIS_MODULE,
},
.size = 4096,
.read = pci_read_config,
rom_attr->size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
rom_attr->attr.name = "rom";
rom_attr->attr.mode = S_IRUSR;
- rom_attr->attr.owner = THIS_MODULE;
rom_attr->read = pci_read_rom;
rom_attr->write = pci_write_rom;
retval = sysfs_create_bin_file(&pdev->dev.kobj, rom_attr);
b->legacy_io->attr.name = "legacy_io";
b->legacy_io->size = 0xffff;
b->legacy_io->attr.mode = S_IRUSR | S_IWUSR;
- b->legacy_io->attr.owner = THIS_MODULE;
b->legacy_io->read = pci_read_legacy_io;
b->legacy_io->write = pci_write_legacy_io;
class_device_create_bin_file(&b->class_dev, b->legacy_io);
b->legacy_mem->attr.name = "legacy_mem";
b->legacy_mem->size = 1024*1024;
b->legacy_mem->attr.mode = S_IRUSR | S_IWUSR;
- b->legacy_mem->attr.owner = THIS_MODULE;
b->legacy_mem->mmap = pci_mmap_legacy_mem;
class_device_create_bin_file(&b->class_dev, b->legacy_mem);
}
return (ret);
}
-static ssize_t pccard_show_cis(struct kobject *kobj, char *buf, loff_t off, size_t count)
+static ssize_t pccard_show_cis(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
unsigned int size = 0x200;
return (count);
}
-static ssize_t pccard_store_cis(struct kobject *kobj, char *buf, loff_t off, size_t count)
+static ssize_t pccard_store_cis(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct pcmcia_socket *s = to_socket(container_of(kobj, struct device, kobj));
cisdump_t *cis;
};
static struct bin_attribute pccard_cis_attr = {
- .attr = { .name = "cis", .mode = S_IRUGO | S_IWUSR, .owner = THIS_MODULE},
+ .attr = { .name = "cis", .mode = S_IRUGO | S_IWUSR },
.size = 0x200,
.read = pccard_show_cis,
.write = pccard_store_cis,
};
static ssize_t
-rio_read_config(struct kobject *kobj, char *buf, loff_t off, size_t count)
+rio_read_config(struct kobject *kobj, struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct rio_dev *dev =
to_rio_dev(container_of(kobj, struct device, kobj));
}
static ssize_t
-rio_write_config(struct kobject *kobj, char *buf, loff_t off, size_t count)
+rio_write_config(struct kobject *kobj, struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct rio_dev *dev =
to_rio_dev(container_of(kobj, struct device, kobj));
.attr = {
.name = "config",
.mode = S_IRUGO | S_IWUSR,
- .owner = THIS_MODULE,
},
.size = 0x200000,
.read = rio_read_config,
.ioctl = ds1553_rtc_ioctl,
};
-static ssize_t ds1553_nvram_read(struct kobject *kobj, char *buf,
- loff_t pos, size_t size)
+static ssize_t ds1553_nvram_read(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t pos, size_t size)
{
struct platform_device *pdev =
to_platform_device(container_of(kobj, struct device, kobj));
return count;
}
-static ssize_t ds1553_nvram_write(struct kobject *kobj, char *buf,
- loff_t pos, size_t size)
+static ssize_t ds1553_nvram_write(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t pos, size_t size)
{
struct platform_device *pdev =
to_platform_device(container_of(kobj, struct device, kobj));
.attr = {
.name = "nvram",
.mode = S_IRUGO | S_IWUGO,
- .owner = THIS_MODULE,
},
.size = RTC_OFFSET,
.read = ds1553_nvram_read,
.set_time = ds1742_rtc_set_time,
};
-static ssize_t ds1742_nvram_read(struct kobject *kobj, char *buf,
- loff_t pos, size_t size)
+static ssize_t ds1742_nvram_read(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t pos, size_t size)
{
struct platform_device *pdev =
to_platform_device(container_of(kobj, struct device, kobj));
return count;
}
-static ssize_t ds1742_nvram_write(struct kobject *kobj, char *buf,
- loff_t pos, size_t size)
+static ssize_t ds1742_nvram_write(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t pos, size_t size)
{
struct platform_device *pdev =
to_platform_device(container_of(kobj, struct device, kobj));
.attr = {
.name = "nvram",
.mode = S_IRUGO | S_IWUGO,
- .owner = THIS_MODULE,
},
.read = ds1742_nvram_read,
.write = ds1742_nvram_write,
/*
* Channel measurement related functions
*/
-static ssize_t chp_measurement_chars_read(struct kobject *kobj, char *buf,
- loff_t off, size_t count)
+static ssize_t chp_measurement_chars_read(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct channel_path *chp;
unsigned int size;
.attr = {
.name = "measurement_chars",
.mode = S_IRUSR,
- .owner = THIS_MODULE,
},
.size = sizeof(struct cmg_chars),
.read = chp_measurement_chars_read,
} while (reference_buf.values[0] != buf->values[0]);
}
-static ssize_t chp_measurement_read(struct kobject *kobj, char *buf,
- loff_t off, size_t count)
+static ssize_t chp_measurement_read(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct channel_path *chp;
struct channel_subsystem *css;
.attr = {
.name = "measurement",
.mode = S_IRUSR,
- .owner = THIS_MODULE,
},
.size = sizeof(struct cmg_entry),
.read = chp_measurement_read,
#define QETH_DEVICE_ATTR(_id,_name,_mode,_show,_store) \
struct device_attribute dev_attr_##_id = { \
- .attr = {.name=__stringify(_name), .mode=_mode, .owner=THIS_MODULE },\
+ .attr = {.name=__stringify(_name), .mode=_mode, },\
.show = _show, \
.store = _store, \
};
struct class_device_attribute *arcmsr_host_attrs[];
static ssize_t
-arcmsr_sysfs_iop_message_read(struct kobject *kobj, char *buf, loff_t off,
- size_t count)
+arcmsr_sysfs_iop_message_read(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct class_device *cdev = container_of(kobj,struct class_device,kobj);
struct Scsi_Host *host = class_to_shost(cdev);
}
static ssize_t
-arcmsr_sysfs_iop_message_write(struct kobject *kobj, char *buf, loff_t off,
- size_t count)
+arcmsr_sysfs_iop_message_write(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct class_device *cdev = container_of(kobj,struct class_device,kobj);
struct Scsi_Host *host = class_to_shost(cdev);
}
static ssize_t
-arcmsr_sysfs_iop_message_clear(struct kobject *kobj, char *buf, loff_t off,
- size_t count)
+arcmsr_sysfs_iop_message_clear(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct class_device *cdev = container_of(kobj,struct class_device,kobj);
struct Scsi_Host *host = class_to_shost(cdev);
.attr = {
.name = "mu_read",
.mode = S_IRUSR ,
- .owner = THIS_MODULE,
},
.size = 1032,
.read = arcmsr_sysfs_iop_message_read,
.attr = {
.name = "mu_write",
.mode = S_IWUSR,
- .owner = THIS_MODULE,
},
.size = 1032,
.write = arcmsr_sysfs_iop_message_write,
.attr = {
.name = "mu_clear",
.mode = S_IWUSR,
- .owner = THIS_MODULE,
},
.size = 1,
.write = arcmsr_sysfs_iop_message_clear,
/**
* ipr_read_trace - Dump the adapter trace
* @kobj: kobject struct
+ * @bin_attr: bin_attribute struct
* @buf: buffer
* @off: offset
* @count: buffer size
* Return value:
* number of bytes printed to buffer
**/
-static ssize_t ipr_read_trace(struct kobject *kobj, char *buf,
- loff_t off, size_t count)
+static ssize_t ipr_read_trace(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct class_device *cdev = container_of(kobj,struct class_device,kobj);
struct Scsi_Host *shost = class_to_shost(cdev);
/**
* ipr_read_dump - Dump the adapter
* @kobj: kobject struct
+ * @bin_attr: bin_attribute struct
* @buf: buffer
* @off: offset
* @count: buffer size
* Return value:
* number of bytes printed to buffer
**/
-static ssize_t ipr_read_dump(struct kobject *kobj, char *buf,
- loff_t off, size_t count)
+static ssize_t ipr_read_dump(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct class_device *cdev = container_of(kobj,struct class_device,kobj);
struct Scsi_Host *shost = class_to_shost(cdev);
/**
* ipr_write_dump - Setup dump state of adapter
* @kobj: kobject struct
+ * @bin_attr: bin_attribute struct
* @buf: buffer
* @off: offset
* @count: buffer size
* Return value:
* number of bytes printed to buffer
**/
-static ssize_t ipr_write_dump(struct kobject *kobj, char *buf,
- loff_t off, size_t count)
+static ssize_t ipr_write_dump(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct class_device *cdev = container_of(kobj,struct class_device,kobj);
struct Scsi_Host *shost = class_to_shost(cdev);
#if 0
/* FIXME: smp needs to migrate into the sas class */
-static ssize_t smp_portal_read(struct kobject *, char *, loff_t, size_t);
-static ssize_t smp_portal_write(struct kobject *, char *, loff_t, size_t);
+static ssize_t smp_portal_read(struct kobject *, struct bin_attribute *,
+ char *, loff_t, size_t);
+static ssize_t smp_portal_write(struct kobject *, struct bin_attribute *,
+ char *, loff_t, size_t);
#endif
/* ---------- SMP task management ---------- */
memset(bin_attr, 0, sizeof(*bin_attr));
bin_attr->attr.name = SMP_BIN_ATTR_NAME;
- bin_attr->attr.owner = THIS_MODULE;
bin_attr->attr.mode = 0600;
bin_attr->size = 0;
#if 0
/* ---------- SMP portal ---------- */
-static ssize_t smp_portal_write(struct kobject *kobj, char *buf, loff_t offs,
- size_t size)
+static ssize_t smp_portal_write(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t offs, size_t size)
{
struct domain_device *dev = to_dom_device(kobj);
struct expander_device *ex = &dev->ex_dev;
return size;
}
-static ssize_t smp_portal_read(struct kobject *kobj, char *buf, loff_t offs,
- size_t size)
+static ssize_t smp_portal_read(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t offs, size_t size)
{
struct domain_device *dev = to_dom_device(kobj);
struct expander_device *ex = &dev->ex_dev;
};
static ssize_t
-sysfs_ctlreg_write(struct kobject *kobj, char *buf, loff_t off, size_t count)
+sysfs_ctlreg_write(struct kobject *kobj, struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
size_t buf_off;
struct Scsi_Host *host = class_to_shost(container_of(kobj,
}
static ssize_t
-sysfs_ctlreg_read(struct kobject *kobj, char *buf, loff_t off, size_t count)
+sysfs_ctlreg_read(struct kobject *kobj, struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
size_t buf_off;
uint32_t * tmp_ptr;
.attr = {
.name = "ctlreg",
.mode = S_IRUSR | S_IWUSR,
- .owner = THIS_MODULE,
},
.size = 256,
.read = sysfs_ctlreg_read,
}
static ssize_t
-sysfs_mbox_write(struct kobject *kobj, char *buf, loff_t off, size_t count)
+sysfs_mbox_write(struct kobject *kobj, struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct Scsi_Host * host =
class_to_shost(container_of(kobj, struct class_device, kobj));
}
static ssize_t
-sysfs_mbox_read(struct kobject *kobj, char *buf, loff_t off, size_t count)
+sysfs_mbox_read(struct kobject *kobj, struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct Scsi_Host *host =
class_to_shost(container_of(kobj, struct class_device,
.attr = {
.name = "mbox",
.mode = S_IRUSR | S_IWUSR,
- .owner = THIS_MODULE,
},
.size = MAILBOX_CMD_SIZE,
.read = sysfs_mbox_read,
/* SYSFS attributes --------------------------------------------------------- */
static ssize_t
-qla2x00_sysfs_read_fw_dump(struct kobject *kobj, char *buf, loff_t off,
- size_t count)
+qla2x00_sysfs_read_fw_dump(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
struct device, kobj)));
}
static ssize_t
-qla2x00_sysfs_write_fw_dump(struct kobject *kobj, char *buf, loff_t off,
- size_t count)
+qla2x00_sysfs_write_fw_dump(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
struct device, kobj)));
.attr = {
.name = "fw_dump",
.mode = S_IRUSR | S_IWUSR,
- .owner = THIS_MODULE,
},
.size = 0,
.read = qla2x00_sysfs_read_fw_dump,
};
static ssize_t
-qla2x00_sysfs_read_nvram(struct kobject *kobj, char *buf, loff_t off,
- size_t count)
+qla2x00_sysfs_read_nvram(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
struct device, kobj)));
}
static ssize_t
-qla2x00_sysfs_write_nvram(struct kobject *kobj, char *buf, loff_t off,
- size_t count)
+qla2x00_sysfs_write_nvram(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
struct device, kobj)));
.attr = {
.name = "nvram",
.mode = S_IRUSR | S_IWUSR,
- .owner = THIS_MODULE,
},
.size = 512,
.read = qla2x00_sysfs_read_nvram,
};
static ssize_t
-qla2x00_sysfs_read_optrom(struct kobject *kobj, char *buf, loff_t off,
- size_t count)
+qla2x00_sysfs_read_optrom(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
struct device, kobj)));
}
static ssize_t
-qla2x00_sysfs_write_optrom(struct kobject *kobj, char *buf, loff_t off,
- size_t count)
+qla2x00_sysfs_write_optrom(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
struct device, kobj)));
.attr = {
.name = "optrom",
.mode = S_IRUSR | S_IWUSR,
- .owner = THIS_MODULE,
},
.size = OPTROM_SIZE_24XX,
.read = qla2x00_sysfs_read_optrom,
};
static ssize_t
-qla2x00_sysfs_write_optrom_ctl(struct kobject *kobj, char *buf, loff_t off,
- size_t count)
+qla2x00_sysfs_write_optrom_ctl(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
struct device, kobj)));
.attr = {
.name = "optrom_ctl",
.mode = S_IWUSR,
- .owner = THIS_MODULE,
},
.size = 0,
.write = qla2x00_sysfs_write_optrom_ctl,
};
static ssize_t
-qla2x00_sysfs_read_vpd(struct kobject *kobj, char *buf, loff_t off,
- size_t count)
+qla2x00_sysfs_read_vpd(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
struct device, kobj)));
}
static ssize_t
-qla2x00_sysfs_write_vpd(struct kobject *kobj, char *buf, loff_t off,
- size_t count)
+qla2x00_sysfs_write_vpd(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
struct device, kobj)));
.attr = {
.name = "vpd",
.mode = S_IRUSR | S_IWUSR,
- .owner = THIS_MODULE,
},
.size = 0,
.read = qla2x00_sysfs_read_vpd,
};
static ssize_t
-qla2x00_sysfs_read_sfp(struct kobject *kobj, char *buf, loff_t off,
- size_t count)
+qla2x00_sysfs_read_sfp(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
struct device, kobj)));
.attr = {
.name = "sfp",
.mode = S_IRUSR | S_IWUSR,
- .owner = THIS_MODULE,
},
.size = SFP_DEV_SIZE * 2,
.read = qla2x00_sysfs_read_sfp,
}
static ssize_t
-at25_bin_read(struct kobject *kobj, char *buf, loff_t off, size_t count)
+at25_bin_read(struct kobject *kobj, struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct device *dev;
struct at25_data *at25;
}
static ssize_t
-at25_bin_write(struct kobject *kobj, char *buf, loff_t off, size_t count)
+at25_bin_write(struct kobject *kobj, struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct device *dev;
struct at25_data *at25;
*/
at25->bin.attr.name = "eeprom";
at25->bin.attr.mode = S_IRUSR;
- at25->bin.attr.owner = THIS_MODULE;
at25->bin.read = at25_bin_read;
at25->bin.size = at25->chip.byte_len;
dev_warn(&rhdev->dev, "root hub lost power or was reset\n");
- /* Make sure no potential wakeup events get lost,
- * by forcing the root hub to be resumed.
- */
- rhdev->dev.power.prev_state.event = PM_EVENT_ON;
-
spin_lock_irqsave(&device_state_lock, flags);
hub = hdev_to_hub(rhdev);
for (port1 = 1; port1 <= rhdev->maxchild; ++port1) {
}
-static ssize_t radeon_show_edid1(struct kobject *kobj, char *buf, loff_t off, size_t count)
+static ssize_t radeon_show_edid1(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct device *dev = container_of(kobj, struct device, kobj);
struct pci_dev *pdev = to_pci_dev(dev);
}
-static ssize_t radeon_show_edid2(struct kobject *kobj, char *buf, loff_t off, size_t count)
+static ssize_t radeon_show_edid2(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct device *dev = container_of(kobj, struct device, kobj);
struct pci_dev *pdev = to_pci_dev(dev);
static struct bin_attribute edid1_attr = {
.attr = {
.name = "edid1",
- .owner = THIS_MODULE,
.mode = 0444,
},
.size = EDID_LENGTH,
static struct bin_attribute edid2_attr = {
.attr = {
.name = "edid2",
- .owner = THIS_MODULE,
.mode = 0444,
},
.size = EDID_LENGTH,
#define DECLARE_ATTR(_name,_mode,_show,_store) \
{ \
- .attr = { .name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE }, \
+ .attr = { .name = __stringify(_name), .mode = _mode }, \
.show = _show, \
.store = _store, \
}
#define DECLARE_ATTR(_name,_mode,_show,_store) \
{ \
- .attr = { .name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE }, \
+ .attr = { .name = __stringify(_name), .mode = _mode }, \
.show = _show, \
.store = _store, \
}
}
#endif /* CONFIG_W1_SLAVE_DS2433_CRC */
-static ssize_t w1_f23_read_bin(struct kobject *kobj, char *buf, loff_t off,
- size_t count)
+static ssize_t w1_f23_read_bin(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct w1_slave *sl = kobj_to_w1_slave(kobj);
#ifdef CONFIG_W1_SLAVE_DS2433_CRC
return 0;
}
-static ssize_t w1_f23_write_bin(struct kobject *kobj, char *buf, loff_t off,
- size_t count)
+static ssize_t w1_f23_write_bin(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct w1_slave *sl = kobj_to_w1_slave(kobj);
int addr, len, idx;
.attr = {
.name = "eeprom",
.mode = S_IRUGO | S_IWUSR,
- .owner = THIS_MODULE,
},
.size = W1_EEPROM_SIZE,
.read = w1_f23_read_bin,
{}
};
-static ssize_t w1_therm_read_bin(struct kobject *, char *, loff_t, size_t);
+static ssize_t w1_therm_read_bin(struct kobject *, struct bin_attribute *,
+ char *, loff_t, size_t);
static struct bin_attribute w1_therm_bin_attr = {
.attr = {
.name = "w1_slave",
.mode = S_IRUGO,
- .owner = THIS_MODULE,
},
.size = W1_SLAVE_DATA_SIZE,
.read = w1_therm_read_bin,
return 0;
}
-static ssize_t w1_therm_read_bin(struct kobject *kobj, char *buf, loff_t off, size_t count)
+static ssize_t w1_therm_read_bin(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct w1_slave *sl = kobj_to_w1_slave(kobj);
struct w1_master *dev = sl->master;
return sprintf(buf, "%s\n", sl->name);
}
-static ssize_t w1_slave_read_id(struct kobject *kobj, char *buf, loff_t off, size_t count)
+static ssize_t w1_slave_read_id(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct w1_slave *sl = kobj_to_w1_slave(kobj);
.attr = {
.name = "id",
.mode = S_IRUGO,
- .owner = THIS_MODULE,
},
.size = 8,
.read = w1_slave_read_id,
/* Default family */
-static ssize_t w1_default_write(struct kobject *kobj, char *buf, loff_t off, size_t count)
+static ssize_t w1_default_write(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct w1_slave *sl = kobj_to_w1_slave(kobj);
return count;
}
-static ssize_t w1_default_read(struct kobject *kobj, char *buf, loff_t off, size_t count)
+static ssize_t w1_default_read(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct w1_slave *sl = kobj_to_w1_slave(kobj);
.attr = {
.name = "rw",
.mode = S_IRUGO | S_IWUSR,
- .owner = THIS_MODULE,
},
.size = PAGE_SIZE,
.read = w1_default_read,
static DEVICE_ATTR(resource, S_IRUGO, zorro_show_resource, NULL);
-static ssize_t zorro_read_config(struct kobject *kobj, char *buf, loff_t off,
- size_t count)
+static ssize_t zorro_read_config(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));
.attr = {
.name = "config",
.mode = S_IRUGO | S_IWUSR,
- .owner = THIS_MODULE
},
.size = sizeof(struct ConfigDev),
.read = zorro_read_config,
}
EXPORT_SYMBOL_GPL(debugfs_remove);
+/**
+ * debugfs_rename - rename a file/directory in the debugfs filesystem
+ * @old_dir: a pointer to the parent dentry for the renamed object. This
+ * should be a directory dentry.
+ * @old_dentry: dentry of an object to be renamed.
+ * @new_dir: a pointer to the parent dentry where the object should be
+ * moved. This should be a directory dentry.
+ * @new_name: a pointer to a string containing the target name.
+ *
+ * This function renames a file/directory in debugfs. The target must not
+ * exist for rename to succeed.
+ *
+ * This function will return a pointer to old_dentry (which is updated to
+ * reflect renaming) if it succeeds. If an error occurs, %NULL will be
+ * returned.
+ *
+ * If debugfs is not enabled in the kernel, the value -%ENODEV will be
+ * returned.
+ */
+struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
+ struct dentry *new_dir, const char *new_name)
+{
+ int error;
+ struct dentry *dentry = NULL, *trap;
+ const char *old_name;
+
+ trap = lock_rename(new_dir, old_dir);
+ /* Source or destination directories don't exist? */
+ if (!old_dir->d_inode || !new_dir->d_inode)
+ goto exit;
+ /* Source does not exist, cyclic rename, or mountpoint? */
+ if (!old_dentry->d_inode || old_dentry == trap ||
+ d_mountpoint(old_dentry))
+ goto exit;
+ dentry = lookup_one_len(new_name, new_dir, strlen(new_name));
+ /* Lookup failed, cyclic rename or target exists? */
+ if (IS_ERR(dentry) || dentry == trap || dentry->d_inode)
+ goto exit;
+
+ old_name = fsnotify_oldname_init(old_dentry->d_name.name);
+
+ error = simple_rename(old_dir->d_inode, old_dentry, new_dir->d_inode,
+ dentry);
+ if (error) {
+ fsnotify_oldname_free(old_name);
+ goto exit;
+ }
+ d_move(old_dentry, dentry);
+ fsnotify_move(old_dir->d_inode, new_dir->d_inode, old_name,
+ old_dentry->d_name.name, S_ISDIR(old_dentry->d_inode->i_mode),
+ NULL, old_dentry->d_inode);
+ fsnotify_oldname_free(old_name);
+ unlock_rename(new_dir, old_dir);
+ dput(dentry);
+ return old_dentry;
+exit:
+ if (dentry && !IS_ERR(dentry))
+ dput(dentry);
+ unlock_rename(new_dir, old_dir);
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(debugfs_rename);
+
static decl_subsys(debug, NULL, NULL);
static int __init debugfs_init(void)
goto out;
}
kobj_set_kset_s(&ecryptfs_subsys, fs_subsys);
- sysfs_attr_version.attr.owner = THIS_MODULE;
- sysfs_attr_version_str.attr.owner = THIS_MODULE;
rc = do_sysfs_registration();
if (rc) {
printk(KERN_ERR "sysfs registration failed\n");
#define define_mask(_name) { \
.attr = { \
.name = #_name, \
- .owner = THIS_MODULE, \
.mode = S_IRUGO | S_IWUSR, \
}, \
.mask = ML_##_name, \
static struct attribute addpartattr = {
.name = "whole_disk",
.mode = S_IRUSR | S_IRGRP | S_IROTH,
- .owner = THIS_MODULE,
};
sysfs_create_file(&p->kobj, &addpartattr);
#include "sysfs.h"
+struct bin_buffer {
+ struct mutex mutex;
+ void *buffer;
+ int mmapped;
+};
+
static int
fill_read(struct dentry *dentry, char *buffer, loff_t off, size_t count)
{
- struct bin_attribute * attr = to_bin_attr(dentry);
- struct kobject * kobj = to_kobj(dentry->d_parent);
+ struct sysfs_dirent *attr_sd = dentry->d_fsdata;
+ struct bin_attribute *attr = attr_sd->s_elem.bin_attr.bin_attr;
+ struct kobject *kobj = attr_sd->s_parent->s_elem.dir.kobj;
+ int rc;
+
+ /* need attr_sd for attr, its parent for kobj */
+ if (!sysfs_get_active_two(attr_sd))
+ return -ENODEV;
- if (!attr->read)
- return -EIO;
+ rc = -EIO;
+ if (attr->read)
+ rc = attr->read(kobj, attr, buffer, off, count);
- return attr->read(kobj, buffer, off, count);
+ sysfs_put_active_two(attr_sd);
+
+ return rc;
}
static ssize_t
-read(struct file * file, char __user * userbuf, size_t count, loff_t * off)
+read(struct file *file, char __user *userbuf, size_t bytes, loff_t *off)
{
- char *buffer = file->private_data;
+ struct bin_buffer *bb = file->private_data;
struct dentry *dentry = file->f_path.dentry;
int size = dentry->d_inode->i_size;
loff_t offs = *off;
- int ret;
-
- if (count > PAGE_SIZE)
- count = PAGE_SIZE;
+ int count = min_t(size_t, bytes, PAGE_SIZE);
if (size) {
if (offs > size)
count = size - offs;
}
- ret = fill_read(dentry, buffer, offs, count);
- if (ret < 0)
- return ret;
- count = ret;
+ mutex_lock(&bb->mutex);
+
+ count = fill_read(dentry, bb->buffer, offs, count);
+ if (count < 0)
+ goto out_unlock;
- if (copy_to_user(userbuf, buffer, count))
- return -EFAULT;
+ if (copy_to_user(userbuf, bb->buffer, count)) {
+ count = -EFAULT;
+ goto out_unlock;
+ }
- pr_debug("offs = %lld, *off = %lld, count = %zd\n", offs, *off, count);
+ pr_debug("offs = %lld, *off = %lld, count = %d\n", offs, *off, count);
*off = offs + count;
+ out_unlock:
+ mutex_unlock(&bb->mutex);
return count;
}
static int
flush_write(struct dentry *dentry, char *buffer, loff_t offset, size_t count)
{
- struct bin_attribute *attr = to_bin_attr(dentry);
- struct kobject *kobj = to_kobj(dentry->d_parent);
+ struct sysfs_dirent *attr_sd = dentry->d_fsdata;
+ struct bin_attribute *attr = attr_sd->s_elem.bin_attr.bin_attr;
+ struct kobject *kobj = attr_sd->s_parent->s_elem.dir.kobj;
+ int rc;
+
+ /* need attr_sd for attr, its parent for kobj */
+ if (!sysfs_get_active_two(attr_sd))
+ return -ENODEV;
+
+ rc = -EIO;
+ if (attr->write)
+ rc = attr->write(kobj, attr, buffer, offset, count);
- if (!attr->write)
- return -EIO;
+ sysfs_put_active_two(attr_sd);
- return attr->write(kobj, buffer, offset, count);
+ return rc;
}
-static ssize_t write(struct file * file, const char __user * userbuf,
- size_t count, loff_t * off)
+static ssize_t write(struct file *file, const char __user *userbuf,
+ size_t bytes, loff_t *off)
{
- char *buffer = file->private_data;
+ struct bin_buffer *bb = file->private_data;
struct dentry *dentry = file->f_path.dentry;
int size = dentry->d_inode->i_size;
loff_t offs = *off;
+ int count = min_t(size_t, bytes, PAGE_SIZE);
- if (count > PAGE_SIZE)
- count = PAGE_SIZE;
if (size) {
if (offs > size)
return 0;
count = size - offs;
}
- if (copy_from_user(buffer, userbuf, count))
- return -EFAULT;
+ mutex_lock(&bb->mutex);
- count = flush_write(dentry, buffer, offs, count);
+ if (copy_from_user(bb->buffer, userbuf, count)) {
+ count = -EFAULT;
+ goto out_unlock;
+ }
+
+ count = flush_write(dentry, bb->buffer, offs, count);
if (count > 0)
*off = offs + count;
+
+ out_unlock:
+ mutex_unlock(&bb->mutex);
return count;
}
static int mmap(struct file *file, struct vm_area_struct *vma)
{
- struct dentry *dentry = file->f_path.dentry;
- struct bin_attribute *attr = to_bin_attr(dentry);
- struct kobject *kobj = to_kobj(dentry->d_parent);
+ struct bin_buffer *bb = file->private_data;
+ struct sysfs_dirent *attr_sd = file->f_path.dentry->d_fsdata;
+ struct bin_attribute *attr = attr_sd->s_elem.bin_attr.bin_attr;
+ struct kobject *kobj = attr_sd->s_parent->s_elem.dir.kobj;
+ int rc;
+
+ mutex_lock(&bb->mutex);
+
+ /* need attr_sd for attr, its parent for kobj */
+ if (!sysfs_get_active_two(attr_sd))
+ return -ENODEV;
- if (!attr->mmap)
- return -EINVAL;
+ rc = -EINVAL;
+ if (attr->mmap)
+ rc = attr->mmap(kobj, attr, vma);
- return attr->mmap(kobj, attr, vma);
+ if (rc == 0 && !bb->mmapped)
+ bb->mmapped = 1;
+ else
+ sysfs_put_active_two(attr_sd);
+
+ mutex_unlock(&bb->mutex);
+
+ return rc;
}
static int open(struct inode * inode, struct file * file)
{
- struct kobject *kobj = sysfs_get_kobject(file->f_path.dentry->d_parent);
- struct bin_attribute * attr = to_bin_attr(file->f_path.dentry);
- int error = -EINVAL;
-
- if (!kobj || !attr)
- goto Done;
+ struct sysfs_dirent *attr_sd = file->f_path.dentry->d_fsdata;
+ struct bin_attribute *attr = attr_sd->s_elem.bin_attr.bin_attr;
+ struct bin_buffer *bb = NULL;
+ int error;
- /* Grab the module reference for this attribute if we have one */
- error = -ENODEV;
- if (!try_module_get(attr->attr.owner))
- goto Done;
+ /* need attr_sd for attr */
+ if (!sysfs_get_active(attr_sd))
+ return -ENODEV;
error = -EACCES;
if ((file->f_mode & FMODE_WRITE) && !(attr->write || attr->mmap))
- goto Error;
+ goto err_out;
if ((file->f_mode & FMODE_READ) && !(attr->read || attr->mmap))
- goto Error;
+ goto err_out;
error = -ENOMEM;
- file->private_data = kmalloc(PAGE_SIZE, GFP_KERNEL);
- if (!file->private_data)
- goto Error;
-
- error = 0;
- goto Done;
-
- Error:
- module_put(attr->attr.owner);
- Done:
- if (error)
- kobject_put(kobj);
+ bb = kzalloc(sizeof(*bb), GFP_KERNEL);
+ if (!bb)
+ goto err_out;
+
+ bb->buffer = kmalloc(PAGE_SIZE, GFP_KERNEL);
+ if (!bb->buffer)
+ goto err_out;
+
+ mutex_init(&bb->mutex);
+ file->private_data = bb;
+
+ /* open succeeded, put active reference and pin attr_sd */
+ sysfs_put_active(attr_sd);
+ sysfs_get(attr_sd);
+ return 0;
+
+ err_out:
+ sysfs_put_active(attr_sd);
+ kfree(bb);
return error;
}
static int release(struct inode * inode, struct file * file)
{
- struct kobject * kobj = to_kobj(file->f_path.dentry->d_parent);
- struct bin_attribute * attr = to_bin_attr(file->f_path.dentry);
- u8 * buffer = file->private_data;
-
- kobject_put(kobj);
- module_put(attr->attr.owner);
- kfree(buffer);
+ struct sysfs_dirent *attr_sd = file->f_path.dentry->d_fsdata;
+ struct bin_buffer *bb = file->private_data;
+
+ if (bb->mmapped)
+ sysfs_put_active_two(attr_sd);
+ sysfs_put(attr_sd);
+ kfree(bb->buffer);
+ kfree(bb);
return 0;
}
int sysfs_create_bin_file(struct kobject * kobj, struct bin_attribute * attr)
{
- BUG_ON(!kobj || !kobj->dentry || !attr);
+ BUG_ON(!kobj || !kobj->sd || !attr);
- return sysfs_add_file(kobj->dentry, &attr->attr, SYSFS_KOBJ_BIN_ATTR);
+ return sysfs_add_file(kobj->sd, &attr->attr, SYSFS_KOBJ_BIN_ATTR);
}
void sysfs_remove_bin_file(struct kobject * kobj, struct bin_attribute * attr)
{
- if (sysfs_hash_and_remove(kobj->dentry, attr->attr.name) < 0) {
+ if (sysfs_hash_and_remove(kobj->sd, attr->attr.name) < 0) {
printk(KERN_ERR "%s: "
"bad dentry or inode or no such file: \"%s\"\n",
__FUNCTION__, attr->attr.name);
#include <linux/module.h>
#include <linux/kobject.h>
#include <linux/namei.h>
+#include <linux/idr.h>
+#include <linux/completion.h>
#include <asm/semaphore.h>
#include "sysfs.h"
-DECLARE_RWSEM(sysfs_rename_sem);
-spinlock_t sysfs_lock = SPIN_LOCK_UNLOCKED;
+DEFINE_MUTEX(sysfs_mutex);
+spinlock_t sysfs_assoc_lock = SPIN_LOCK_UNLOCKED;
+
+static spinlock_t sysfs_ino_lock = SPIN_LOCK_UNLOCKED;
+static DEFINE_IDA(sysfs_ino_ida);
+
+/**
+ * sysfs_link_sibling - link sysfs_dirent into sibling list
+ * @sd: sysfs_dirent of interest
+ *
+ * Link @sd into its sibling list which starts from
+ * sd->s_parent->s_children.
+ *
+ * Locking:
+ * mutex_lock(sysfs_mutex)
+ */
+void sysfs_link_sibling(struct sysfs_dirent *sd)
+{
+ struct sysfs_dirent *parent_sd = sd->s_parent;
+
+ BUG_ON(sd->s_sibling);
+ sd->s_sibling = parent_sd->s_children;
+ parent_sd->s_children = sd;
+}
+
+/**
+ * sysfs_unlink_sibling - unlink sysfs_dirent from sibling list
+ * @sd: sysfs_dirent of interest
+ *
+ * Unlink @sd from its sibling list which starts from
+ * sd->s_parent->s_children.
+ *
+ * Locking:
+ * mutex_lock(sysfs_mutex)
+ */
+void sysfs_unlink_sibling(struct sysfs_dirent *sd)
+{
+ struct sysfs_dirent **pos;
+
+ for (pos = &sd->s_parent->s_children; *pos; pos = &(*pos)->s_sibling) {
+ if (*pos == sd) {
+ *pos = sd->s_sibling;
+ sd->s_sibling = NULL;
+ break;
+ }
+ }
+}
+
+/**
+ * sysfs_get_dentry - get dentry for the given sysfs_dirent
+ * @sd: sysfs_dirent of interest
+ *
+ * Get dentry for @sd. Dentry is looked up if currently not
+ * present. This function climbs sysfs_dirent tree till it
+ * reaches a sysfs_dirent with valid dentry attached and descends
+ * down from there looking up dentry for each step.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep)
+ *
+ * RETURNS:
+ * Pointer to found dentry on success, ERR_PTR() value on error.
+ */
+struct dentry *sysfs_get_dentry(struct sysfs_dirent *sd)
+{
+ struct sysfs_dirent *cur;
+ struct dentry *parent_dentry, *dentry;
+ int i, depth;
+
+ /* Find the first parent which has valid s_dentry and get the
+ * dentry.
+ */
+ mutex_lock(&sysfs_mutex);
+ restart0:
+ spin_lock(&sysfs_assoc_lock);
+ restart1:
+ spin_lock(&dcache_lock);
+
+ dentry = NULL;
+ depth = 0;
+ cur = sd;
+ while (!cur->s_dentry || !cur->s_dentry->d_inode) {
+ if (cur->s_flags & SYSFS_FLAG_REMOVED) {
+ dentry = ERR_PTR(-ENOENT);
+ depth = 0;
+ break;
+ }
+ cur = cur->s_parent;
+ depth++;
+ }
+ if (!IS_ERR(dentry))
+ dentry = dget_locked(cur->s_dentry);
+
+ spin_unlock(&dcache_lock);
+ spin_unlock(&sysfs_assoc_lock);
+
+ /* from the found dentry, look up depth times */
+ while (depth--) {
+ /* find and get depth'th ancestor */
+ for (cur = sd, i = 0; cur && i < depth; i++)
+ cur = cur->s_parent;
+
+ /* This can happen if tree structure was modified due
+ * to move/rename. Restart.
+ */
+ if (i != depth) {
+ dput(dentry);
+ goto restart0;
+ }
+
+ sysfs_get(cur);
+
+ mutex_unlock(&sysfs_mutex);
+
+ /* look it up */
+ parent_dentry = dentry;
+ dentry = lookup_one_len_kern(cur->s_name, parent_dentry,
+ strlen(cur->s_name));
+ dput(parent_dentry);
+
+ if (IS_ERR(dentry)) {
+ sysfs_put(cur);
+ return dentry;
+ }
+
+ mutex_lock(&sysfs_mutex);
+ spin_lock(&sysfs_assoc_lock);
+
+ /* This, again, can happen if tree structure has
+ * changed and we looked up the wrong thing. Restart.
+ */
+ if (cur->s_dentry != dentry) {
+ dput(dentry);
+ sysfs_put(cur);
+ goto restart1;
+ }
+
+ spin_unlock(&sysfs_assoc_lock);
+
+ sysfs_put(cur);
+ }
+
+ mutex_unlock(&sysfs_mutex);
+ return dentry;
+}
+
+/**
+ * sysfs_get_active - get an active reference to sysfs_dirent
+ * @sd: sysfs_dirent to get an active reference to
+ *
+ * Get an active reference of @sd. This function is noop if @sd
+ * is NULL.
+ *
+ * RETURNS:
+ * Pointer to @sd on success, NULL on failure.
+ */
+struct sysfs_dirent *sysfs_get_active(struct sysfs_dirent *sd)
+{
+ if (unlikely(!sd))
+ return NULL;
+
+ while (1) {
+ int v, t;
+
+ v = atomic_read(&sd->s_active);
+ if (unlikely(v < 0))
+ return NULL;
+
+ t = atomic_cmpxchg(&sd->s_active, v, v + 1);
+ if (likely(t == v))
+ return sd;
+ if (t < 0)
+ return NULL;
+
+ cpu_relax();
+ }
+}
+
+/**
+ * sysfs_put_active - put an active reference to sysfs_dirent
+ * @sd: sysfs_dirent to put an active reference to
+ *
+ * Put an active reference to @sd. This function is noop if @sd
+ * is NULL.
+ */
+void sysfs_put_active(struct sysfs_dirent *sd)
+{
+ struct completion *cmpl;
+ int v;
+
+ if (unlikely(!sd))
+ return;
+
+ v = atomic_dec_return(&sd->s_active);
+ if (likely(v != SD_DEACTIVATED_BIAS))
+ return;
+
+ /* atomic_dec_return() is a mb(), we'll always see the updated
+ * sd->s_sibling.
+ */
+ cmpl = (void *)sd->s_sibling;
+ complete(cmpl);
+}
+
+/**
+ * sysfs_get_active_two - get active references to sysfs_dirent and parent
+ * @sd: sysfs_dirent of interest
+ *
+ * Get active reference to @sd and its parent. Parent's active
+ * reference is grabbed first. This function is noop if @sd is
+ * NULL.
+ *
+ * RETURNS:
+ * Pointer to @sd on success, NULL on failure.
+ */
+struct sysfs_dirent *sysfs_get_active_two(struct sysfs_dirent *sd)
+{
+ if (sd) {
+ if (sd->s_parent && unlikely(!sysfs_get_active(sd->s_parent)))
+ return NULL;
+ if (unlikely(!sysfs_get_active(sd))) {
+ sysfs_put_active(sd->s_parent);
+ return NULL;
+ }
+ }
+ return sd;
+}
+
+/**
+ * sysfs_put_active_two - put active references to sysfs_dirent and parent
+ * @sd: sysfs_dirent of interest
+ *
+ * Put active references to @sd and its parent. This function is
+ * noop if @sd is NULL.
+ */
+void sysfs_put_active_two(struct sysfs_dirent *sd)
+{
+ if (sd) {
+ sysfs_put_active(sd);
+ sysfs_put_active(sd->s_parent);
+ }
+}
+
+/**
+ * sysfs_deactivate - deactivate sysfs_dirent
+ * @sd: sysfs_dirent to deactivate
+ *
+ * Deny new active references and drain existing ones.
+ */
+static void sysfs_deactivate(struct sysfs_dirent *sd)
+{
+ DECLARE_COMPLETION_ONSTACK(wait);
+ int v;
+
+ BUG_ON(sd->s_sibling || !(sd->s_flags & SYSFS_FLAG_REMOVED));
+ sd->s_sibling = (void *)&wait;
+
+ /* atomic_add_return() is a mb(), put_active() will always see
+ * the updated sd->s_sibling.
+ */
+ v = atomic_add_return(SD_DEACTIVATED_BIAS, &sd->s_active);
+
+ if (v != SD_DEACTIVATED_BIAS)
+ wait_for_completion(&wait);
+
+ sd->s_sibling = NULL;
+}
+
+static int sysfs_alloc_ino(ino_t *pino)
+{
+ int ino, rc;
+
+ retry:
+ spin_lock(&sysfs_ino_lock);
+ rc = ida_get_new_above(&sysfs_ino_ida, 2, &ino);
+ spin_unlock(&sysfs_ino_lock);
+
+ if (rc == -EAGAIN) {
+ if (ida_pre_get(&sysfs_ino_ida, GFP_KERNEL))
+ goto retry;
+ rc = -ENOMEM;
+ }
+
+ *pino = ino;
+ return rc;
+}
+
+static void sysfs_free_ino(ino_t ino)
+{
+ spin_lock(&sysfs_ino_lock);
+ ida_remove(&sysfs_ino_ida, ino);
+ spin_unlock(&sysfs_ino_lock);
+}
+
+void release_sysfs_dirent(struct sysfs_dirent * sd)
+{
+ struct sysfs_dirent *parent_sd;
+
+ repeat:
+ /* Moving/renaming is always done while holding reference.
+ * sd->s_parent won't change beneath us.
+ */
+ parent_sd = sd->s_parent;
+
+ if (sysfs_type(sd) == SYSFS_KOBJ_LINK)
+ sysfs_put(sd->s_elem.symlink.target_sd);
+ if (sysfs_type(sd) & SYSFS_COPY_NAME)
+ kfree(sd->s_name);
+ kfree(sd->s_iattr);
+ sysfs_free_ino(sd->s_ino);
+ kmem_cache_free(sysfs_dir_cachep, sd);
+
+ sd = parent_sd;
+ if (sd && atomic_dec_and_test(&sd->s_count))
+ goto repeat;
+}
static void sysfs_d_iput(struct dentry * dentry, struct inode * inode)
{
struct sysfs_dirent * sd = dentry->d_fsdata;
if (sd) {
- /* sd->s_dentry is protected with sysfs_lock. This
- * allows sysfs_drop_dentry() to dereference it.
+ /* sd->s_dentry is protected with sysfs_assoc_lock.
+ * This allows sysfs_drop_dentry() to dereference it.
*/
- spin_lock(&sysfs_lock);
+ spin_lock(&sysfs_assoc_lock);
/* The dentry might have been deleted or another
* lookup could have happened updating sd->s_dentry to
*/
if (sd->s_dentry == dentry)
sd->s_dentry = NULL;
- spin_unlock(&sysfs_lock);
+ spin_unlock(&sysfs_assoc_lock);
sysfs_put(sd);
}
iput(inode);
.d_iput = sysfs_d_iput,
};
-static unsigned int sysfs_inode_counter;
-ino_t sysfs_get_inum(void)
+struct sysfs_dirent *sysfs_new_dirent(const char *name, umode_t mode, int type)
{
- if (unlikely(sysfs_inode_counter < 3))
- sysfs_inode_counter = 3;
- return sysfs_inode_counter++;
-}
+ char *dup_name = NULL;
+ struct sysfs_dirent *sd = NULL;
-/*
- * Allocates a new sysfs_dirent and links it to the parent sysfs_dirent
- */
-static struct sysfs_dirent * __sysfs_new_dirent(void * element)
-{
- struct sysfs_dirent * sd;
+ if (type & SYSFS_COPY_NAME) {
+ name = dup_name = kstrdup(name, GFP_KERNEL);
+ if (!name)
+ goto err_out;
+ }
sd = kmem_cache_zalloc(sysfs_dir_cachep, GFP_KERNEL);
if (!sd)
- return NULL;
+ goto err_out;
+
+ if (sysfs_alloc_ino(&sd->s_ino))
+ goto err_out;
- sd->s_ino = sysfs_get_inum();
atomic_set(&sd->s_count, 1);
+ atomic_set(&sd->s_active, 0);
atomic_set(&sd->s_event, 1);
- INIT_LIST_HEAD(&sd->s_children);
- INIT_LIST_HEAD(&sd->s_sibling);
- sd->s_element = element;
+
+ sd->s_name = name;
+ sd->s_mode = mode;
+ sd->s_flags = type;
return sd;
+
+ err_out:
+ kfree(dup_name);
+ kmem_cache_free(sysfs_dir_cachep, sd);
+ return NULL;
}
-static void __sysfs_list_dirent(struct sysfs_dirent *parent_sd,
- struct sysfs_dirent *sd)
+/**
+ * sysfs_attach_dentry - associate sysfs_dirent with dentry
+ * @sd: target sysfs_dirent
+ * @dentry: dentry to associate
+ *
+ * Associate @sd with @dentry. This is protected by
+ * sysfs_assoc_lock to avoid race with sysfs_d_iput().
+ *
+ * LOCKING:
+ * mutex_lock(sysfs_mutex)
+ */
+static void sysfs_attach_dentry(struct sysfs_dirent *sd, struct dentry *dentry)
{
- if (sd)
- list_add(&sd->s_sibling, &parent_sd->s_children);
+ dentry->d_op = &sysfs_dentry_ops;
+ dentry->d_fsdata = sysfs_get(sd);
+
+ /* protect sd->s_dentry against sysfs_d_iput */
+ spin_lock(&sysfs_assoc_lock);
+ sd->s_dentry = dentry;
+ spin_unlock(&sysfs_assoc_lock);
+
+ d_rehash(dentry);
}
-static struct sysfs_dirent * sysfs_new_dirent(struct sysfs_dirent *parent_sd,
- void * element)
+static int sysfs_ilookup_test(struct inode *inode, void *arg)
{
- struct sysfs_dirent *sd;
- sd = __sysfs_new_dirent(element);
- __sysfs_list_dirent(parent_sd, sd);
- return sd;
+ struct sysfs_dirent *sd = arg;
+ return inode->i_ino == sd->s_ino;
}
-/*
+/**
+ * sysfs_addrm_start - prepare for sysfs_dirent add/remove
+ * @acxt: pointer to sysfs_addrm_cxt to be used
+ * @parent_sd: parent sysfs_dirent
*
- * Return -EEXIST if there is already a sysfs element with the same name for
- * the same parent.
+ * This function is called when the caller is about to add or
+ * remove sysfs_dirent under @parent_sd. This function acquires
+ * sysfs_mutex, grabs inode for @parent_sd if available and lock
+ * i_mutex of it. @acxt is used to keep and pass context to
+ * other addrm functions.
*
- * called with parent inode's i_mutex held
+ * LOCKING:
+ * Kernel thread context (may sleep). sysfs_mutex is locked on
+ * return. i_mutex of parent inode is locked on return if
+ * available.
*/
-int sysfs_dirent_exist(struct sysfs_dirent *parent_sd,
- const unsigned char *new)
+void sysfs_addrm_start(struct sysfs_addrm_cxt *acxt,
+ struct sysfs_dirent *parent_sd)
{
- struct sysfs_dirent * sd;
+ struct inode *inode;
- list_for_each_entry(sd, &parent_sd->s_children, s_sibling) {
- if (sd->s_element) {
- const unsigned char *existing = sysfs_get_name(sd);
- if (strcmp(existing, new))
- continue;
- else
- return -EEXIST;
- }
- }
+ memset(acxt, 0, sizeof(*acxt));
+ acxt->parent_sd = parent_sd;
- return 0;
+ /* Lookup parent inode. inode initialization and I_NEW
+ * clearing are protected by sysfs_mutex. By grabbing it and
+ * looking up with _nowait variant, inode state can be
+ * determined reliably.
+ */
+ mutex_lock(&sysfs_mutex);
+
+ inode = ilookup5_nowait(sysfs_sb, parent_sd->s_ino, sysfs_ilookup_test,
+ parent_sd);
+
+ if (inode && !(inode->i_state & I_NEW)) {
+ /* parent inode available */
+ acxt->parent_inode = inode;
+
+ /* sysfs_mutex is below i_mutex in lock hierarchy.
+ * First, trylock i_mutex. If fails, unlock
+ * sysfs_mutex and lock them in order.
+ */
+ if (!mutex_trylock(&inode->i_mutex)) {
+ mutex_unlock(&sysfs_mutex);
+ mutex_lock(&inode->i_mutex);
+ mutex_lock(&sysfs_mutex);
+ }
+ } else
+ iput(inode);
}
+/**
+ * sysfs_add_one - add sysfs_dirent to parent
+ * @acxt: addrm context to use
+ * @sd: sysfs_dirent to be added
+ *
+ * Get @acxt->parent_sd and set sd->s_parent to it and increment
+ * nlink of parent inode if @sd is a directory. @sd is NOT
+ * linked into the children list of the parent. The caller
+ * should invoke sysfs_link_sibling() after this function
+ * completes if @sd needs to be on the children list.
+ *
+ * This function should be called between calls to
+ * sysfs_addrm_start() and sysfs_addrm_finish() and should be
+ * passed the same @acxt as passed to sysfs_addrm_start().
+ *
+ * LOCKING:
+ * Determined by sysfs_addrm_start().
+ */
+void sysfs_add_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd)
+{
+ sd->s_parent = sysfs_get(acxt->parent_sd);
+
+ if (sysfs_type(sd) == SYSFS_DIR && acxt->parent_inode)
+ inc_nlink(acxt->parent_inode);
+
+ acxt->cnt++;
+}
-static struct sysfs_dirent *
-__sysfs_make_dirent(struct dentry *dentry, void *element, mode_t mode, int type)
+/**
+ * sysfs_remove_one - remove sysfs_dirent from parent
+ * @acxt: addrm context to use
+ * @sd: sysfs_dirent to be added
+ *
+ * Mark @sd removed and drop nlink of parent inode if @sd is a
+ * directory. @sd is NOT unlinked from the children list of the
+ * parent. The caller is repsonsible for removing @sd from the
+ * children list before calling this function.
+ *
+ * This function should be called between calls to
+ * sysfs_addrm_start() and sysfs_addrm_finish() and should be
+ * passed the same @acxt as passed to sysfs_addrm_start().
+ *
+ * LOCKING:
+ * Determined by sysfs_addrm_start().
+ */
+void sysfs_remove_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd)
{
- struct sysfs_dirent * sd;
+ BUG_ON(sd->s_sibling || (sd->s_flags & SYSFS_FLAG_REMOVED));
- sd = __sysfs_new_dirent(element);
- if (!sd)
- goto out;
+ sd->s_flags |= SYSFS_FLAG_REMOVED;
+ sd->s_sibling = acxt->removed;
+ acxt->removed = sd;
- sd->s_mode = mode;
- sd->s_type = type;
- sd->s_dentry = dentry;
- if (dentry) {
- dentry->d_fsdata = sysfs_get(sd);
- dentry->d_op = &sysfs_dentry_ops;
- }
+ if (sysfs_type(sd) == SYSFS_DIR && acxt->parent_inode)
+ drop_nlink(acxt->parent_inode);
-out:
- return sd;
+ acxt->cnt++;
}
-int sysfs_make_dirent(struct sysfs_dirent * parent_sd, struct dentry * dentry,
- void * element, umode_t mode, int type)
+/**
+ * sysfs_drop_dentry - drop dentry for the specified sysfs_dirent
+ * @sd: target sysfs_dirent
+ *
+ * Drop dentry for @sd. @sd must have been unlinked from its
+ * parent on entry to this function such that it can't be looked
+ * up anymore.
+ *
+ * @sd->s_dentry which is protected with sysfs_assoc_lock points
+ * to the currently associated dentry but we're not holding a
+ * reference to it and racing with dput(). Grab dcache_lock and
+ * verify dentry before dropping it. If @sd->s_dentry is NULL or
+ * dput() beats us, no need to bother.
+ */
+static void sysfs_drop_dentry(struct sysfs_dirent *sd)
{
- struct sysfs_dirent *sd;
+ struct dentry *dentry = NULL;
+ struct inode *inode;
+
+ /* We're not holding a reference to ->s_dentry dentry but the
+ * field will stay valid as long as sysfs_assoc_lock is held.
+ */
+ spin_lock(&sysfs_assoc_lock);
+ spin_lock(&dcache_lock);
+
+ /* drop dentry if it's there and dput() didn't kill it yet */
+ if (sd->s_dentry && sd->s_dentry->d_inode) {
+ dentry = dget_locked(sd->s_dentry);
+ spin_lock(&dentry->d_lock);
+ __d_drop(dentry);
+ spin_unlock(&dentry->d_lock);
+ }
- sd = __sysfs_make_dirent(dentry, element, mode, type);
- __sysfs_list_dirent(parent_sd, sd);
+ spin_unlock(&dcache_lock);
+ spin_unlock(&sysfs_assoc_lock);
- return sd ? 0 : -ENOMEM;
+ /* dentries for shadowed inodes are pinned, unpin */
+ if (dentry && sysfs_is_shadowed_inode(dentry->d_inode))
+ dput(dentry);
+ dput(dentry);
+
+ /* adjust nlink and update timestamp */
+ inode = ilookup(sysfs_sb, sd->s_ino);
+ if (inode) {
+ mutex_lock(&inode->i_mutex);
+
+ inode->i_ctime = CURRENT_TIME;
+ drop_nlink(inode);
+ if (sysfs_type(sd) == SYSFS_DIR)
+ drop_nlink(inode);
+
+ mutex_unlock(&inode->i_mutex);
+ iput(inode);
+ }
}
-static int init_dir(struct inode * inode)
+/**
+ * sysfs_addrm_finish - finish up sysfs_dirent add/remove
+ * @acxt: addrm context to finish up
+ *
+ * Finish up sysfs_dirent add/remove. Resources acquired by
+ * sysfs_addrm_start() are released and removed sysfs_dirents are
+ * cleaned up. Timestamps on the parent inode are updated.
+ *
+ * LOCKING:
+ * All mutexes acquired by sysfs_addrm_start() are released.
+ *
+ * RETURNS:
+ * Number of added/removed sysfs_dirents since sysfs_addrm_start().
+ */
+int sysfs_addrm_finish(struct sysfs_addrm_cxt *acxt)
{
- inode->i_op = &sysfs_dir_inode_operations;
- inode->i_fop = &sysfs_dir_operations;
+ /* release resources acquired by sysfs_addrm_start() */
+ mutex_unlock(&sysfs_mutex);
+ if (acxt->parent_inode) {
+ struct inode *inode = acxt->parent_inode;
- /* directory inodes start off with i_nlink == 2 (for "." entry) */
- inc_nlink(inode);
- return 0;
+ /* if added/removed, update timestamps on the parent */
+ if (acxt->cnt)
+ inode->i_ctime = inode->i_mtime = CURRENT_TIME;
+
+ mutex_unlock(&inode->i_mutex);
+ iput(inode);
+ }
+
+ /* kill removed sysfs_dirents */
+ while (acxt->removed) {
+ struct sysfs_dirent *sd = acxt->removed;
+
+ acxt->removed = sd->s_sibling;
+ sd->s_sibling = NULL;
+
+ sysfs_drop_dentry(sd);
+ sysfs_deactivate(sd);
+ sysfs_put(sd);
+ }
+
+ return acxt->cnt;
}
-static int init_file(struct inode * inode)
+/**
+ * sysfs_find_dirent - find sysfs_dirent with the given name
+ * @parent_sd: sysfs_dirent to search under
+ * @name: name to look for
+ *
+ * Look for sysfs_dirent with name @name under @parent_sd.
+ *
+ * LOCKING:
+ * mutex_lock(sysfs_mutex)
+ *
+ * RETURNS:
+ * Pointer to sysfs_dirent if found, NULL if not.
+ */
+struct sysfs_dirent *sysfs_find_dirent(struct sysfs_dirent *parent_sd,
+ const unsigned char *name)
{
- inode->i_size = PAGE_SIZE;
- inode->i_fop = &sysfs_file_operations;
- return 0;
+ struct sysfs_dirent *sd;
+
+ for (sd = parent_sd->s_children; sd; sd = sd->s_sibling)
+ if (sysfs_type(sd) && !strcmp(sd->s_name, name))
+ return sd;
+ return NULL;
}
-static int init_symlink(struct inode * inode)
+/**
+ * sysfs_get_dirent - find and get sysfs_dirent with the given name
+ * @parent_sd: sysfs_dirent to search under
+ * @name: name to look for
+ *
+ * Look for sysfs_dirent with name @name under @parent_sd and get
+ * it if found.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep). Grabs sysfs_mutex.
+ *
+ * RETURNS:
+ * Pointer to sysfs_dirent if found, NULL if not.
+ */
+struct sysfs_dirent *sysfs_get_dirent(struct sysfs_dirent *parent_sd,
+ const unsigned char *name)
{
- inode->i_op = &sysfs_symlink_inode_operations;
- return 0;
+ struct sysfs_dirent *sd;
+
+ mutex_lock(&sysfs_mutex);
+ sd = sysfs_find_dirent(parent_sd, name);
+ sysfs_get(sd);
+ mutex_unlock(&sysfs_mutex);
+
+ return sd;
}
-static int create_dir(struct kobject * k, struct dentry * p,
- const char * n, struct dentry ** d)
+static int create_dir(struct kobject *kobj, struct sysfs_dirent *parent_sd,
+ const char *name, struct sysfs_dirent **p_sd)
{
- int error;
umode_t mode = S_IFDIR| S_IRWXU | S_IRUGO | S_IXUGO;
+ struct sysfs_addrm_cxt acxt;
+ struct sysfs_dirent *sd;
- mutex_lock(&p->d_inode->i_mutex);
- *d = lookup_one_len(n, p, strlen(n));
- if (!IS_ERR(*d)) {
- if (sysfs_dirent_exist(p->d_fsdata, n))
- error = -EEXIST;
- else
- error = sysfs_make_dirent(p->d_fsdata, *d, k, mode,
- SYSFS_DIR);
- if (!error) {
- error = sysfs_create(*d, mode, init_dir);
- if (!error) {
- inc_nlink(p->d_inode);
- (*d)->d_op = &sysfs_dentry_ops;
- d_rehash(*d);
- }
- }
- if (error && (error != -EEXIST)) {
- struct sysfs_dirent *sd = (*d)->d_fsdata;
- if (sd) {
- list_del_init(&sd->s_sibling);
- sysfs_put(sd);
- }
- d_drop(*d);
- }
- dput(*d);
- } else
- error = PTR_ERR(*d);
- mutex_unlock(&p->d_inode->i_mutex);
- return error;
-}
+ /* allocate */
+ sd = sysfs_new_dirent(name, mode, SYSFS_DIR);
+ if (!sd)
+ return -ENOMEM;
+ sd->s_elem.dir.kobj = kobj;
+ /* link in */
+ sysfs_addrm_start(&acxt, parent_sd);
+ if (!sysfs_find_dirent(parent_sd, name)) {
+ sysfs_add_one(&acxt, sd);
+ sysfs_link_sibling(sd);
+ }
+ if (sysfs_addrm_finish(&acxt)) {
+ *p_sd = sd;
+ return 0;
+ }
-int sysfs_create_subdir(struct kobject * k, const char * n, struct dentry ** d)
+ sysfs_put(sd);
+ return -EEXIST;
+}
+
+int sysfs_create_subdir(struct kobject *kobj, const char *name,
+ struct sysfs_dirent **p_sd)
{
- return create_dir(k,k->dentry,n,d);
+ return create_dir(kobj, kobj->sd, name, p_sd);
}
/**
* sysfs_create_dir - create a directory for an object.
* @kobj: object we're creating directory for.
- * @shadow_parent: parent parent object.
+ * @shadow_parent: parent object.
*/
-
-int sysfs_create_dir(struct kobject * kobj, struct dentry *shadow_parent)
+int sysfs_create_dir(struct kobject *kobj,
+ struct sysfs_dirent *shadow_parent_sd)
{
- struct dentry * dentry = NULL;
- struct dentry * parent;
+ struct sysfs_dirent *parent_sd, *sd;
int error = 0;
BUG_ON(!kobj);
- if (shadow_parent)
- parent = shadow_parent;
+ if (shadow_parent_sd)
+ parent_sd = shadow_parent_sd;
else if (kobj->parent)
- parent = kobj->parent->dentry;
+ parent_sd = kobj->parent->sd;
else if (sysfs_mount && sysfs_mount->mnt_sb)
- parent = sysfs_mount->mnt_sb->s_root;
+ parent_sd = sysfs_mount->mnt_sb->s_root->d_fsdata;
else
return -EFAULT;
- error = create_dir(kobj,parent,kobject_name(kobj),&dentry);
+ error = create_dir(kobj, parent_sd, kobject_name(kobj), &sd);
if (!error)
- kobj->dentry = dentry;
+ kobj->sd = sd;
return error;
}
-/* attaches attribute's sysfs_dirent to the dentry corresponding to the
- * attribute file
- */
-static int sysfs_attach_attr(struct sysfs_dirent * sd, struct dentry * dentry)
+static int sysfs_count_nlink(struct sysfs_dirent *sd)
{
- struct attribute * attr = NULL;
- struct bin_attribute * bin_attr = NULL;
- int (* init) (struct inode *) = NULL;
- int error = 0;
-
- if (sd->s_type & SYSFS_KOBJ_BIN_ATTR) {
- bin_attr = sd->s_element;
- attr = &bin_attr->attr;
- } else {
- attr = sd->s_element;
- init = init_file;
- }
+ struct sysfs_dirent *child;
+ int nr = 0;
- dentry->d_fsdata = sysfs_get(sd);
- /* protect sd->s_dentry against sysfs_d_iput */
- spin_lock(&sysfs_lock);
- sd->s_dentry = dentry;
- spin_unlock(&sysfs_lock);
- error = sysfs_create(dentry, (attr->mode & S_IALLUGO) | S_IFREG, init);
- if (error) {
- sysfs_put(sd);
- return error;
- }
-
- if (bin_attr) {
- dentry->d_inode->i_size = bin_attr->size;
- dentry->d_inode->i_fop = &bin_fops;
- }
- dentry->d_op = &sysfs_dentry_ops;
- d_rehash(dentry);
-
- return 0;
-}
-
-static int sysfs_attach_link(struct sysfs_dirent * sd, struct dentry * dentry)
-{
- int err = 0;
-
- dentry->d_fsdata = sysfs_get(sd);
- /* protect sd->s_dentry against sysfs_d_iput */
- spin_lock(&sysfs_lock);
- sd->s_dentry = dentry;
- spin_unlock(&sysfs_lock);
- err = sysfs_create(dentry, S_IFLNK|S_IRWXUGO, init_symlink);
- if (!err) {
- dentry->d_op = &sysfs_dentry_ops;
- d_rehash(dentry);
- } else
- sysfs_put(sd);
-
- return err;
+ for (child = sd->s_children; child; child = child->s_sibling)
+ if (sysfs_type(child) == SYSFS_DIR)
+ nr++;
+ return nr + 2;
}
static struct dentry * sysfs_lookup(struct inode *dir, struct dentry *dentry,
{
struct sysfs_dirent * parent_sd = dentry->d_parent->d_fsdata;
struct sysfs_dirent * sd;
- int err = 0;
+ struct bin_attribute *bin_attr;
+ struct inode *inode;
+ int found = 0;
- list_for_each_entry(sd, &parent_sd->s_children, s_sibling) {
- if (sd->s_type & SYSFS_NOT_PINNED) {
- const unsigned char * name = sysfs_get_name(sd);
+ for (sd = parent_sd->s_children; sd; sd = sd->s_sibling) {
+ if (sysfs_type(sd) &&
+ !strcmp(sd->s_name, dentry->d_name.name)) {
+ found = 1;
+ break;
+ }
+ }
- if (strcmp(name, dentry->d_name.name))
- continue;
+ /* no such entry */
+ if (!found)
+ return NULL;
- if (sd->s_type & SYSFS_KOBJ_LINK)
- err = sysfs_attach_link(sd, dentry);
- else
- err = sysfs_attach_attr(sd, dentry);
+ /* attach dentry and inode */
+ inode = sysfs_get_inode(sd);
+ if (!inode)
+ return ERR_PTR(-ENOMEM);
+
+ mutex_lock(&sysfs_mutex);
+
+ if (inode->i_state & I_NEW) {
+ /* initialize inode according to type */
+ switch (sysfs_type(sd)) {
+ case SYSFS_DIR:
+ inode->i_op = &sysfs_dir_inode_operations;
+ inode->i_fop = &sysfs_dir_operations;
+ inode->i_nlink = sysfs_count_nlink(sd);
+ break;
+ case SYSFS_KOBJ_ATTR:
+ inode->i_size = PAGE_SIZE;
+ inode->i_fop = &sysfs_file_operations;
+ break;
+ case SYSFS_KOBJ_BIN_ATTR:
+ bin_attr = sd->s_elem.bin_attr.bin_attr;
+ inode->i_size = bin_attr->size;
+ inode->i_fop = &bin_fops;
break;
+ case SYSFS_KOBJ_LINK:
+ inode->i_op = &sysfs_symlink_inode_operations;
+ break;
+ default:
+ BUG();
}
}
- return ERR_PTR(err);
+ sysfs_instantiate(dentry, inode);
+ sysfs_attach_dentry(sd, dentry);
+
+ mutex_unlock(&sysfs_mutex);
+
+ return NULL;
}
const struct inode_operations sysfs_dir_inode_operations = {
.setattr = sysfs_setattr,
};
-static void remove_dir(struct dentry * d)
+static void remove_dir(struct sysfs_dirent *sd)
{
- struct dentry * parent = dget(d->d_parent);
- struct sysfs_dirent * sd;
-
- mutex_lock(&parent->d_inode->i_mutex);
- d_delete(d);
- sd = d->d_fsdata;
- list_del_init(&sd->s_sibling);
- sysfs_put(sd);
- if (d->d_inode)
- simple_rmdir(parent->d_inode,d);
-
- pr_debug(" o %s removing done (%d)\n",d->d_name.name,
- atomic_read(&d->d_count));
+ struct sysfs_addrm_cxt acxt;
- mutex_unlock(&parent->d_inode->i_mutex);
- dput(parent);
+ sysfs_addrm_start(&acxt, sd->s_parent);
+ sysfs_unlink_sibling(sd);
+ sysfs_remove_one(&acxt, sd);
+ sysfs_addrm_finish(&acxt);
}
-void sysfs_remove_subdir(struct dentry * d)
+void sysfs_remove_subdir(struct sysfs_dirent *sd)
{
- remove_dir(d);
+ remove_dir(sd);
}
-static void __sysfs_remove_dir(struct dentry *dentry)
+static void __sysfs_remove_dir(struct sysfs_dirent *dir_sd)
{
- struct sysfs_dirent * parent_sd;
- struct sysfs_dirent * sd, * tmp;
+ struct sysfs_addrm_cxt acxt;
+ struct sysfs_dirent **pos;
- dget(dentry);
- if (!dentry)
+ if (!dir_sd)
return;
- pr_debug("sysfs %s: removing dir\n",dentry->d_name.name);
- mutex_lock(&dentry->d_inode->i_mutex);
- parent_sd = dentry->d_fsdata;
- list_for_each_entry_safe(sd, tmp, &parent_sd->s_children, s_sibling) {
- if (!sd->s_element || !(sd->s_type & SYSFS_NOT_PINNED))
- continue;
- list_del_init(&sd->s_sibling);
- sysfs_drop_dentry(sd, dentry);
- sysfs_put(sd);
+ pr_debug("sysfs %s: removing dir\n", dir_sd->s_name);
+ sysfs_addrm_start(&acxt, dir_sd);
+ pos = &dir_sd->s_children;
+ while (*pos) {
+ struct sysfs_dirent *sd = *pos;
+
+ if (sysfs_type(sd) && sysfs_type(sd) != SYSFS_DIR) {
+ *pos = sd->s_sibling;
+ sd->s_sibling = NULL;
+ sysfs_remove_one(&acxt, sd);
+ } else
+ pos = &(*pos)->s_sibling;
}
- mutex_unlock(&dentry->d_inode->i_mutex);
+ sysfs_addrm_finish(&acxt);
- remove_dir(dentry);
- /**
- * Drop reference from dget() on entrance.
- */
- dput(dentry);
+ remove_dir(dir_sd);
}
/**
void sysfs_remove_dir(struct kobject * kobj)
{
- __sysfs_remove_dir(kobj->dentry);
- kobj->dentry = NULL;
+ struct sysfs_dirent *sd = kobj->sd;
+
+ spin_lock(&sysfs_assoc_lock);
+ kobj->sd = NULL;
+ spin_unlock(&sysfs_assoc_lock);
+
+ __sysfs_remove_dir(sd);
}
-int sysfs_rename_dir(struct kobject * kobj, struct dentry *new_parent,
+int sysfs_rename_dir(struct kobject *kobj, struct sysfs_dirent *new_parent_sd,
const char *new_name)
{
- int error = 0;
- struct dentry * new_dentry;
+ struct sysfs_dirent *sd = kobj->sd;
+ struct dentry *new_parent = NULL;
+ struct dentry *old_dentry = NULL, *new_dentry = NULL;
+ const char *dup_name = NULL;
+ int error;
- if (!new_parent)
- return -EFAULT;
+ /* get dentries */
+ old_dentry = sysfs_get_dentry(sd);
+ if (IS_ERR(old_dentry)) {
+ error = PTR_ERR(old_dentry);
+ goto out_dput;
+ }
- down_write(&sysfs_rename_sem);
+ new_parent = sysfs_get_dentry(new_parent_sd);
+ if (IS_ERR(new_parent)) {
+ error = PTR_ERR(new_parent);
+ goto out_dput;
+ }
+
+ /* lock new_parent and get dentry for new name */
mutex_lock(&new_parent->d_inode->i_mutex);
new_dentry = lookup_one_len(new_name, new_parent, strlen(new_name));
- if (!IS_ERR(new_dentry)) {
- /* By allowing two different directories with the
- * same d_parent we allow this routine to move
- * between different shadows of the same directory
- */
- if (kobj->dentry->d_parent->d_inode != new_parent->d_inode)
- return -EINVAL;
- else if (new_dentry->d_parent->d_inode != new_parent->d_inode)
- error = -EINVAL;
- else if (new_dentry == kobj->dentry)
- error = -EINVAL;
- else if (!new_dentry->d_inode) {
- error = kobject_set_name(kobj, "%s", new_name);
- if (!error) {
- struct sysfs_dirent *sd, *parent_sd;
-
- d_add(new_dentry, NULL);
- d_move(kobj->dentry, new_dentry);
-
- sd = kobj->dentry->d_fsdata;
- parent_sd = new_parent->d_fsdata;
-
- list_del_init(&sd->s_sibling);
- list_add(&sd->s_sibling, &parent_sd->s_children);
- }
- else
- d_drop(new_dentry);
- } else
- error = -EEXIST;
- dput(new_dentry);
+ if (IS_ERR(new_dentry)) {
+ error = PTR_ERR(new_dentry);
+ goto out_unlock;
}
- mutex_unlock(&new_parent->d_inode->i_mutex);
- up_write(&sysfs_rename_sem);
+ /* By allowing two different directories with the same
+ * d_parent we allow this routine to move between different
+ * shadows of the same directory
+ */
+ error = -EINVAL;
+ if (old_dentry->d_parent->d_inode != new_parent->d_inode ||
+ new_dentry->d_parent->d_inode != new_parent->d_inode ||
+ old_dentry == new_dentry)
+ goto out_unlock;
+
+ error = -EEXIST;
+ if (new_dentry->d_inode)
+ goto out_unlock;
+
+ /* rename kobject and sysfs_dirent */
+ error = -ENOMEM;
+ new_name = dup_name = kstrdup(new_name, GFP_KERNEL);
+ if (!new_name)
+ goto out_drop;
+
+ error = kobject_set_name(kobj, "%s", new_name);
+ if (error)
+ goto out_drop;
+
+ dup_name = sd->s_name;
+ sd->s_name = new_name;
+
+ /* move under the new parent */
+ d_add(new_dentry, NULL);
+ d_move(sd->s_dentry, new_dentry);
+
+ mutex_lock(&sysfs_mutex);
+
+ sysfs_unlink_sibling(sd);
+ sysfs_get(new_parent_sd);
+ sysfs_put(sd->s_parent);
+ sd->s_parent = new_parent_sd;
+ sysfs_link_sibling(sd);
+
+ mutex_unlock(&sysfs_mutex);
+
+ error = 0;
+ goto out_unlock;
+
+ out_drop:
+ d_drop(new_dentry);
+ out_unlock:
+ mutex_unlock(&new_parent->d_inode->i_mutex);
+ out_dput:
+ kfree(dup_name);
+ dput(new_parent);
+ dput(old_dentry);
+ dput(new_dentry);
return error;
}
-int sysfs_move_dir(struct kobject *kobj, struct kobject *new_parent)
+int sysfs_move_dir(struct kobject *kobj, struct kobject *new_parent_kobj)
{
- struct dentry *old_parent_dentry, *new_parent_dentry, *new_dentry;
- struct sysfs_dirent *new_parent_sd, *sd;
+ struct sysfs_dirent *sd = kobj->sd;
+ struct sysfs_dirent *new_parent_sd;
+ struct dentry *old_parent, *new_parent = NULL;
+ struct dentry *old_dentry = NULL, *new_dentry = NULL;
int error;
- old_parent_dentry = kobj->parent ?
- kobj->parent->dentry : sysfs_mount->mnt_sb->s_root;
- new_parent_dentry = new_parent ?
- new_parent->dentry : sysfs_mount->mnt_sb->s_root;
+ BUG_ON(!sd->s_parent);
+ new_parent_sd = new_parent_kobj->sd ? new_parent_kobj->sd : &sysfs_root;
+
+ /* get dentries */
+ old_dentry = sysfs_get_dentry(sd);
+ if (IS_ERR(old_dentry)) {
+ error = PTR_ERR(old_dentry);
+ goto out_dput;
+ }
+ old_parent = sd->s_parent->s_dentry;
+
+ new_parent = sysfs_get_dentry(new_parent_sd);
+ if (IS_ERR(new_parent)) {
+ error = PTR_ERR(new_parent);
+ goto out_dput;
+ }
- if (old_parent_dentry->d_inode == new_parent_dentry->d_inode)
- return 0; /* nothing to move */
+ if (old_parent->d_inode == new_parent->d_inode) {
+ error = 0;
+ goto out_dput; /* nothing to move */
+ }
again:
- mutex_lock(&old_parent_dentry->d_inode->i_mutex);
- if (!mutex_trylock(&new_parent_dentry->d_inode->i_mutex)) {
- mutex_unlock(&old_parent_dentry->d_inode->i_mutex);
+ mutex_lock(&old_parent->d_inode->i_mutex);
+ if (!mutex_trylock(&new_parent->d_inode->i_mutex)) {
+ mutex_unlock(&old_parent->d_inode->i_mutex);
goto again;
}
- new_parent_sd = new_parent_dentry->d_fsdata;
- sd = kobj->dentry->d_fsdata;
-
- new_dentry = lookup_one_len(kobj->name, new_parent_dentry,
- strlen(kobj->name));
+ new_dentry = lookup_one_len(kobj->name, new_parent, strlen(kobj->name));
if (IS_ERR(new_dentry)) {
error = PTR_ERR(new_dentry);
- goto out;
+ goto out_unlock;
} else
error = 0;
d_add(new_dentry, NULL);
- d_move(kobj->dentry, new_dentry);
+ d_move(sd->s_dentry, new_dentry);
dput(new_dentry);
/* Remove from old parent's list and insert into new parent's list. */
- list_del_init(&sd->s_sibling);
- list_add(&sd->s_sibling, &new_parent_sd->s_children);
+ mutex_lock(&sysfs_mutex);
+
+ sysfs_unlink_sibling(sd);
+ sysfs_get(new_parent_sd);
+ sysfs_put(sd->s_parent);
+ sd->s_parent = new_parent_sd;
+ sysfs_link_sibling(sd);
-out:
- mutex_unlock(&new_parent_dentry->d_inode->i_mutex);
- mutex_unlock(&old_parent_dentry->d_inode->i_mutex);
+ mutex_unlock(&sysfs_mutex);
+ out_unlock:
+ mutex_unlock(&new_parent->d_inode->i_mutex);
+ mutex_unlock(&old_parent->d_inode->i_mutex);
+ out_dput:
+ dput(new_parent);
+ dput(old_dentry);
+ dput(new_dentry);
return error;
}
{
struct dentry * dentry = file->f_path.dentry;
struct sysfs_dirent * parent_sd = dentry->d_fsdata;
+ struct sysfs_dirent * sd;
- mutex_lock(&dentry->d_inode->i_mutex);
- file->private_data = sysfs_new_dirent(parent_sd, NULL);
- mutex_unlock(&dentry->d_inode->i_mutex);
-
- return file->private_data ? 0 : -ENOMEM;
+ sd = sysfs_new_dirent("_DIR_", 0, 0);
+ if (sd) {
+ mutex_lock(&sysfs_mutex);
+ sd->s_parent = sysfs_get(parent_sd);
+ sysfs_link_sibling(sd);
+ mutex_unlock(&sysfs_mutex);
+ }
+ file->private_data = sd;
+ return sd ? 0 : -ENOMEM;
}
static int sysfs_dir_close(struct inode *inode, struct file *file)
{
- struct dentry * dentry = file->f_path.dentry;
struct sysfs_dirent * cursor = file->private_data;
- mutex_lock(&dentry->d_inode->i_mutex);
- list_del_init(&cursor->s_sibling);
- mutex_unlock(&dentry->d_inode->i_mutex);
+ mutex_lock(&sysfs_mutex);
+ sysfs_unlink_sibling(cursor);
+ mutex_unlock(&sysfs_mutex);
release_sysfs_dirent(cursor);
struct dentry *dentry = filp->f_path.dentry;
struct sysfs_dirent * parent_sd = dentry->d_fsdata;
struct sysfs_dirent *cursor = filp->private_data;
- struct list_head *p, *q = &cursor->s_sibling;
+ struct sysfs_dirent **pos;
ino_t ino;
int i = filp->f_pos;
i++;
/* fallthrough */
case 1:
- ino = parent_ino(dentry);
+ if (parent_sd->s_parent)
+ ino = parent_sd->s_parent->s_ino;
+ else
+ ino = parent_sd->s_ino;
if (filldir(dirent, "..", 2, i, ino, DT_DIR) < 0)
break;
filp->f_pos++;
i++;
/* fallthrough */
default:
+ mutex_lock(&sysfs_mutex);
+
+ pos = &parent_sd->s_children;
+ while (*pos != cursor)
+ pos = &(*pos)->s_sibling;
+
+ /* unlink cursor */
+ *pos = cursor->s_sibling;
+
if (filp->f_pos == 2)
- list_move(q, &parent_sd->s_children);
+ pos = &parent_sd->s_children;
- for (p=q->next; p!= &parent_sd->s_children; p=p->next) {
- struct sysfs_dirent *next;
+ for ( ; *pos; pos = &(*pos)->s_sibling) {
+ struct sysfs_dirent *next = *pos;
const char * name;
int len;
- next = list_entry(p, struct sysfs_dirent,
- s_sibling);
- if (!next->s_element)
+ if (!sysfs_type(next))
continue;
- name = sysfs_get_name(next);
+ name = next->s_name;
len = strlen(name);
ino = next->s_ino;
if (filldir(dirent, name, len, filp->f_pos, ino,
dt_type(next)) < 0)
- return 0;
+ break;
- list_move(q, p);
- p = q;
filp->f_pos++;
}
+
+ /* put cursor back in */
+ cursor->s_sibling = *pos;
+ *pos = cursor;
+
+ mutex_unlock(&sysfs_mutex);
}
return 0;
}
{
struct dentry * dentry = file->f_path.dentry;
- mutex_lock(&dentry->d_inode->i_mutex);
switch (origin) {
case 1:
offset += file->f_pos;
if (offset >= 0)
break;
default:
- mutex_unlock(&file->f_path.dentry->d_inode->i_mutex);
return -EINVAL;
}
if (offset != file->f_pos) {
+ mutex_lock(&sysfs_mutex);
+
file->f_pos = offset;
if (file->f_pos >= 2) {
struct sysfs_dirent *sd = dentry->d_fsdata;
struct sysfs_dirent *cursor = file->private_data;
- struct list_head *p;
+ struct sysfs_dirent **pos;
loff_t n = file->f_pos - 2;
- list_del(&cursor->s_sibling);
- p = sd->s_children.next;
- while (n && p != &sd->s_children) {
- struct sysfs_dirent *next;
- next = list_entry(p, struct sysfs_dirent,
- s_sibling);
- if (next->s_element)
+ sysfs_unlink_sibling(cursor);
+
+ pos = &sd->s_children;
+ while (n && *pos) {
+ struct sysfs_dirent *next = *pos;
+ if (sysfs_type(next))
n--;
- p = p->next;
+ pos = &(*pos)->s_sibling;
}
- list_add_tail(&cursor->s_sibling, p);
+
+ cursor->s_sibling = *pos;
+ *pos = cursor;
}
+
+ mutex_unlock(&sysfs_mutex);
}
- mutex_unlock(&dentry->d_inode->i_mutex);
+
return offset;
}
int sysfs_make_shadowed_dir(struct kobject *kobj,
void * (*follow_link)(struct dentry *, struct nameidata *))
{
+ struct dentry *dentry;
struct inode *inode;
struct inode_operations *i_op;
- inode = kobj->dentry->d_inode;
- if (inode->i_op != &sysfs_dir_inode_operations)
+ /* get dentry for @kobj->sd, dentry of a shadowed dir is pinned */
+ dentry = sysfs_get_dentry(kobj->sd);
+ if (IS_ERR(dentry))
+ return PTR_ERR(dentry);
+
+ inode = dentry->d_inode;
+ if (inode->i_op != &sysfs_dir_inode_operations) {
+ dput(dentry);
return -EINVAL;
+ }
i_op = kmalloc(sizeof(*i_op), GFP_KERNEL);
if (!i_op)
* directory.
*/
-struct dentry *sysfs_create_shadow_dir(struct kobject *kobj)
+struct sysfs_dirent *sysfs_create_shadow_dir(struct kobject *kobj)
{
- struct sysfs_dirent *sd;
- struct dentry *parent, *dir, *shadow;
+ struct sysfs_dirent *parent_sd = kobj->sd->s_parent;
+ struct dentry *dir, *parent, *shadow;
struct inode *inode;
+ struct sysfs_dirent *sd;
+ struct sysfs_addrm_cxt acxt;
- dir = kobj->dentry;
- inode = dir->d_inode;
+ dir = sysfs_get_dentry(kobj->sd);
+ if (IS_ERR(dir)) {
+ sd = (void *)dir;
+ goto out;
+ }
parent = dir->d_parent;
- shadow = ERR_PTR(-EINVAL);
+
+ inode = dir->d_inode;
+ sd = ERR_PTR(-EINVAL);
if (!sysfs_is_shadowed_inode(inode))
- goto out;
+ goto out_dput;
shadow = d_alloc(parent, &dir->d_name);
if (!shadow)
goto nomem;
- sd = __sysfs_make_dirent(shadow, kobj, inode->i_mode, SYSFS_DIR);
+ sd = sysfs_new_dirent("_SHADOW_", inode->i_mode, SYSFS_DIR);
if (!sd)
goto nomem;
+ sd->s_elem.dir.kobj = kobj;
+ sysfs_addrm_start(&acxt, parent_sd);
+
+ /* add but don't link into children list */
+ sysfs_add_one(&acxt, sd);
+
+ /* attach and instantiate dentry */
+ sysfs_attach_dentry(sd, shadow);
d_instantiate(shadow, igrab(inode));
- inc_nlink(inode);
- inc_nlink(parent->d_inode);
- shadow->d_op = &sysfs_dentry_ops;
+ inc_nlink(inode); /* tj: synchronization? */
+
+ sysfs_addrm_finish(&acxt);
dget(shadow); /* Extra count - pin the dentry in core */
-out:
- return shadow;
-nomem:
+ goto out_dput;
+
+ nomem:
dput(shadow);
- shadow = ERR_PTR(-ENOMEM);
- goto out;
+ sd = ERR_PTR(-ENOMEM);
+ out_dput:
+ dput(dir);
+ out:
+ return sd;
}
/**
* sysfs_remove_shadow_dir - remove an object's directory.
- * @shadow: dentry of shadow directory
+ * @shadow_sd: sysfs_dirent of shadow directory
*
* The only thing special about this is that we remove any files in
* the directory before we remove the directory, and we've inlined
* what used to be sysfs_rmdir() below, instead of calling separately.
*/
-void sysfs_remove_shadow_dir(struct dentry *shadow)
+void sysfs_remove_shadow_dir(struct sysfs_dirent *shadow_sd)
{
- __sysfs_remove_dir(shadow);
+ __sysfs_remove_dir(shadow_sd);
}
const struct file_operations sysfs_dir_operations = {
.store = subsys_attr_store,
};
-/**
- * add_to_collection - add buffer to a collection
- * @buffer: buffer to be added
- * @node: inode of set to add to
- */
-
-static inline void
-add_to_collection(struct sysfs_buffer *buffer, struct inode *node)
-{
- struct sysfs_buffer_collection *set = node->i_private;
-
- mutex_lock(&node->i_mutex);
- list_add(&buffer->associates, &set->associates);
- mutex_unlock(&node->i_mutex);
-}
-
-static inline void
-remove_from_collection(struct sysfs_buffer *buffer, struct inode *node)
-{
- mutex_lock(&node->i_mutex);
- list_del(&buffer->associates);
- mutex_unlock(&node->i_mutex);
-}
+struct sysfs_buffer {
+ size_t count;
+ loff_t pos;
+ char * page;
+ struct sysfs_ops * ops;
+ struct semaphore sem;
+ int needs_read_fill;
+ int event;
+};
/**
* fill_read_buffer - allocate and fill buffer from object.
*/
static int fill_read_buffer(struct dentry * dentry, struct sysfs_buffer * buffer)
{
- struct sysfs_dirent * sd = dentry->d_fsdata;
- struct attribute * attr = to_attr(dentry);
- struct kobject * kobj = to_kobj(dentry->d_parent);
+ struct sysfs_dirent *attr_sd = dentry->d_fsdata;
+ struct kobject *kobj = attr_sd->s_parent->s_elem.dir.kobj;
struct sysfs_ops * ops = buffer->ops;
int ret = 0;
ssize_t count;
if (!buffer->page)
return -ENOMEM;
- buffer->event = atomic_read(&sd->s_event);
- count = ops->show(kobj,attr,buffer->page);
+ /* need attr_sd for attr and ops, its parent for kobj */
+ if (!sysfs_get_active_two(attr_sd))
+ return -ENODEV;
+
+ buffer->event = atomic_read(&attr_sd->s_event);
+ count = ops->show(kobj, attr_sd->s_elem.attr.attr, buffer->page);
+
+ sysfs_put_active_two(attr_sd);
+
BUG_ON(count > (ssize_t)PAGE_SIZE);
if (count >= 0) {
buffer->needs_read_fill = 0;
down(&buffer->sem);
if (buffer->needs_read_fill) {
- if (buffer->orphaned)
- retval = -ENODEV;
- else
- retval = fill_read_buffer(file->f_path.dentry,buffer);
+ retval = fill_read_buffer(file->f_path.dentry,buffer);
if (retval)
goto out;
}
* passing the buffer that we acquired in fill_write_buffer().
*/
-static int
+static int
flush_write_buffer(struct dentry * dentry, struct sysfs_buffer * buffer, size_t count)
{
- struct attribute * attr = to_attr(dentry);
- struct kobject * kobj = to_kobj(dentry->d_parent);
+ struct sysfs_dirent *attr_sd = dentry->d_fsdata;
+ struct kobject *kobj = attr_sd->s_parent->s_elem.dir.kobj;
struct sysfs_ops * ops = buffer->ops;
+ int rc;
+
+ /* need attr_sd for attr and ops, its parent for kobj */
+ if (!sysfs_get_active_two(attr_sd))
+ return -ENODEV;
+
+ rc = ops->store(kobj, attr_sd->s_elem.attr.attr, buffer->page, count);
- return ops->store(kobj,attr,buffer->page,count);
+ sysfs_put_active_two(attr_sd);
+
+ return rc;
}
ssize_t len;
down(&buffer->sem);
- if (buffer->orphaned) {
- len = -ENODEV;
- goto out;
- }
len = fill_write_buffer(buffer, buf, count);
if (len > 0)
len = flush_write_buffer(file->f_path.dentry, buffer, len);
if (len > 0)
*ppos += len;
-out:
up(&buffer->sem);
return len;
}
static int sysfs_open_file(struct inode *inode, struct file *file)
{
- struct kobject *kobj = sysfs_get_kobject(file->f_path.dentry->d_parent);
- struct attribute * attr = to_attr(file->f_path.dentry);
- struct sysfs_buffer_collection *set;
+ struct sysfs_dirent *attr_sd = file->f_path.dentry->d_fsdata;
+ struct kobject *kobj = attr_sd->s_parent->s_elem.dir.kobj;
struct sysfs_buffer * buffer;
struct sysfs_ops * ops = NULL;
- int error = 0;
-
- if (!kobj || !attr)
- goto Einval;
+ int error;
- /* Grab the module reference for this attribute if we have one */
- if (!try_module_get(attr->owner)) {
- error = -ENODEV;
- goto Done;
- }
+ /* need attr_sd for attr and ops, its parent for kobj */
+ if (!sysfs_get_active_two(attr_sd))
+ return -ENODEV;
/* if the kobject has no ktype, then we assume that it is a subsystem
* itself, and use ops for it.
else
ops = &subsys_sysfs_ops;
+ error = -EACCES;
+
/* No sysfs operations, either from having no subsystem,
* or the subsystem have no operations.
*/
if (!ops)
- goto Eaccess;
-
- /* make sure we have a collection to add our buffers to */
- mutex_lock(&inode->i_mutex);
- if (!(set = inode->i_private)) {
- if (!(set = inode->i_private = kmalloc(sizeof(struct sysfs_buffer_collection), GFP_KERNEL))) {
- error = -ENOMEM;
- goto Done;
- } else {
- INIT_LIST_HEAD(&set->associates);
- }
- }
- mutex_unlock(&inode->i_mutex);
+ goto err_out;
/* File needs write support.
* The inode's perms must say it's ok,
* and we must have a store method.
*/
if (file->f_mode & FMODE_WRITE) {
-
if (!(inode->i_mode & S_IWUGO) || !ops->store)
- goto Eaccess;
-
+ goto err_out;
}
/* File needs read support.
*/
if (file->f_mode & FMODE_READ) {
if (!(inode->i_mode & S_IRUGO) || !ops->show)
- goto Eaccess;
+ goto err_out;
}
/* No error? Great, allocate a buffer for the file, and store it
* it in file->private_data for easy access.
*/
+ error = -ENOMEM;
buffer = kzalloc(sizeof(struct sysfs_buffer), GFP_KERNEL);
- if (buffer) {
- INIT_LIST_HEAD(&buffer->associates);
- init_MUTEX(&buffer->sem);
- buffer->needs_read_fill = 1;
- buffer->ops = ops;
- add_to_collection(buffer, inode);
- file->private_data = buffer;
- } else
- error = -ENOMEM;
- goto Done;
-
- Einval:
- error = -EINVAL;
- goto Done;
- Eaccess:
- error = -EACCES;
- module_put(attr->owner);
- Done:
- if (error)
- kobject_put(kobj);
+ if (!buffer)
+ goto err_out;
+
+ init_MUTEX(&buffer->sem);
+ buffer->needs_read_fill = 1;
+ buffer->ops = ops;
+ file->private_data = buffer;
+
+ /* open succeeded, put active references and pin attr_sd */
+ sysfs_put_active_two(attr_sd);
+ sysfs_get(attr_sd);
+ return 0;
+
+ err_out:
+ sysfs_put_active_two(attr_sd);
return error;
}
static int sysfs_release(struct inode * inode, struct file * filp)
{
- struct kobject * kobj = to_kobj(filp->f_path.dentry->d_parent);
- struct attribute * attr = to_attr(filp->f_path.dentry);
- struct module * owner = attr->owner;
- struct sysfs_buffer * buffer = filp->private_data;
+ struct sysfs_dirent *attr_sd = filp->f_path.dentry->d_fsdata;
+ struct sysfs_buffer *buffer = filp->private_data;
- if (buffer)
- remove_from_collection(buffer, inode);
- kobject_put(kobj);
- /* After this point, attr should not be accessed. */
- module_put(owner);
+ sysfs_put(attr_sd);
if (buffer) {
if (buffer->page)
static unsigned int sysfs_poll(struct file *filp, poll_table *wait)
{
struct sysfs_buffer * buffer = filp->private_data;
- struct kobject * kobj = to_kobj(filp->f_path.dentry->d_parent);
- struct sysfs_dirent * sd = filp->f_path.dentry->d_fsdata;
- int res = 0;
+ struct sysfs_dirent *attr_sd = filp->f_path.dentry->d_fsdata;
+ struct kobject *kobj = attr_sd->s_parent->s_elem.dir.kobj;
+
+ /* need parent for the kobj, grab both */
+ if (!sysfs_get_active_two(attr_sd))
+ goto trigger;
poll_wait(filp, &kobj->poll, wait);
- if (buffer->event != atomic_read(&sd->s_event)) {
- res = POLLERR|POLLPRI;
- buffer->needs_read_fill = 1;
- }
+ sysfs_put_active_two(attr_sd);
- return res;
-}
+ if (buffer->event != atomic_read(&attr_sd->s_event))
+ goto trigger;
+ return 0;
-static struct dentry *step_down(struct dentry *dir, const char * name)
-{
- struct dentry * de;
-
- if (dir == NULL || dir->d_inode == NULL)
- return NULL;
-
- mutex_lock(&dir->d_inode->i_mutex);
- de = lookup_one_len(name, dir, strlen(name));
- mutex_unlock(&dir->d_inode->i_mutex);
- dput(dir);
- if (IS_ERR(de))
- return NULL;
- if (de->d_inode == NULL) {
- dput(de);
- return NULL;
- }
- return de;
+ trigger:
+ buffer->needs_read_fill = 1;
+ return POLLERR|POLLPRI;
}
-void sysfs_notify(struct kobject * k, char *dir, char *attr)
+void sysfs_notify(struct kobject *k, char *dir, char *attr)
{
- struct dentry *de = k->dentry;
- if (de)
- dget(de);
- if (de && dir)
- de = step_down(de, dir);
- if (de && attr)
- de = step_down(de, attr);
- if (de) {
- struct sysfs_dirent * sd = de->d_fsdata;
- if (sd)
- atomic_inc(&sd->s_event);
+ struct sysfs_dirent *sd = k->sd;
+
+ mutex_lock(&sysfs_mutex);
+
+ if (sd && dir)
+ sd = sysfs_find_dirent(sd, dir);
+ if (sd && attr)
+ sd = sysfs_find_dirent(sd, attr);
+ if (sd) {
+ atomic_inc(&sd->s_event);
wake_up_interruptible(&k->poll);
- dput(de);
}
+
+ mutex_unlock(&sysfs_mutex);
}
EXPORT_SYMBOL_GPL(sysfs_notify);
};
-int sysfs_add_file(struct dentry * dir, const struct attribute * attr, int type)
+int sysfs_add_file(struct sysfs_dirent *dir_sd, const struct attribute *attr,
+ int type)
{
- struct sysfs_dirent * parent_sd = dir->d_fsdata;
umode_t mode = (attr->mode & S_IALLUGO) | S_IFREG;
- int error = -EEXIST;
+ struct sysfs_addrm_cxt acxt;
+ struct sysfs_dirent *sd;
- mutex_lock(&dir->d_inode->i_mutex);
- if (!sysfs_dirent_exist(parent_sd, attr->name))
- error = sysfs_make_dirent(parent_sd, NULL, (void *)attr,
- mode, type);
- mutex_unlock(&dir->d_inode->i_mutex);
+ sd = sysfs_new_dirent(attr->name, mode, type);
+ if (!sd)
+ return -ENOMEM;
+ sd->s_elem.attr.attr = (void *)attr;
- return error;
+ sysfs_addrm_start(&acxt, dir_sd);
+
+ if (!sysfs_find_dirent(dir_sd, attr->name)) {
+ sysfs_add_one(&acxt, sd);
+ sysfs_link_sibling(sd);
+ }
+
+ if (sysfs_addrm_finish(&acxt))
+ return 0;
+
+ sysfs_put(sd);
+ return -EEXIST;
}
int sysfs_create_file(struct kobject * kobj, const struct attribute * attr)
{
- BUG_ON(!kobj || !kobj->dentry || !attr);
+ BUG_ON(!kobj || !kobj->sd || !attr);
- return sysfs_add_file(kobj->dentry, attr, SYSFS_KOBJ_ATTR);
+ return sysfs_add_file(kobj->sd, attr, SYSFS_KOBJ_ATTR);
}
int sysfs_add_file_to_group(struct kobject *kobj,
const struct attribute *attr, const char *group)
{
- struct dentry *dir;
+ struct sysfs_dirent *dir_sd;
int error;
- dir = lookup_one_len(group, kobj->dentry, strlen(group));
- if (IS_ERR(dir))
- error = PTR_ERR(dir);
- else {
- error = sysfs_add_file(dir, attr, SYSFS_KOBJ_ATTR);
- dput(dir);
- }
+ dir_sd = sysfs_get_dirent(kobj->sd, group);
+ if (!dir_sd)
+ return -ENOENT;
+
+ error = sysfs_add_file(dir_sd, attr, SYSFS_KOBJ_ATTR);
+ sysfs_put(dir_sd);
+
return error;
}
EXPORT_SYMBOL_GPL(sysfs_add_file_to_group);
*/
int sysfs_update_file(struct kobject * kobj, const struct attribute * attr)
{
- struct dentry * dir = kobj->dentry;
- struct dentry * victim;
- int res = -ENOENT;
-
- mutex_lock(&dir->d_inode->i_mutex);
- victim = lookup_one_len(attr->name, dir, strlen(attr->name));
- if (!IS_ERR(victim)) {
- /* make sure dentry is really there */
- if (victim->d_inode &&
- (victim->d_parent->d_inode == dir->d_inode)) {
- victim->d_inode->i_mtime = CURRENT_TIME;
- fsnotify_modify(victim);
- res = 0;
- } else
- d_drop(victim);
-
- /**
- * Drop the reference acquired from lookup_one_len() above.
- */
- dput(victim);
+ struct sysfs_dirent *victim_sd = NULL;
+ struct dentry *victim = NULL;
+ int rc;
+
+ rc = -ENOENT;
+ victim_sd = sysfs_get_dirent(kobj->sd, attr->name);
+ if (!victim_sd)
+ goto out;
+
+ victim = sysfs_get_dentry(victim_sd);
+ if (IS_ERR(victim)) {
+ rc = PTR_ERR(victim);
+ victim = NULL;
+ goto out;
}
- mutex_unlock(&dir->d_inode->i_mutex);
- return res;
+ mutex_lock(&victim->d_inode->i_mutex);
+ victim->d_inode->i_mtime = CURRENT_TIME;
+ fsnotify_modify(victim);
+ mutex_unlock(&victim->d_inode->i_mutex);
+ rc = 0;
+ out:
+ dput(victim);
+ sysfs_put(victim_sd);
+ return rc;
}
*/
int sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode)
{
- struct dentry *dir = kobj->dentry;
- struct dentry *victim;
+ struct sysfs_dirent *victim_sd = NULL;
+ struct dentry *victim = NULL;
struct inode * inode;
struct iattr newattrs;
- int res = -ENOENT;
-
- mutex_lock(&dir->d_inode->i_mutex);
- victim = lookup_one_len(attr->name, dir, strlen(attr->name));
- if (!IS_ERR(victim)) {
- if (victim->d_inode &&
- (victim->d_parent->d_inode == dir->d_inode)) {
- inode = victim->d_inode;
- mutex_lock(&inode->i_mutex);
- newattrs.ia_mode = (mode & S_IALLUGO) |
- (inode->i_mode & ~S_IALLUGO);
- newattrs.ia_valid = ATTR_MODE | ATTR_CTIME;
- res = notify_change(victim, &newattrs);
- mutex_unlock(&inode->i_mutex);
- }
- dput(victim);
+ int rc;
+
+ rc = -ENOENT;
+ victim_sd = sysfs_get_dirent(kobj->sd, attr->name);
+ if (!victim_sd)
+ goto out;
+
+ victim = sysfs_get_dentry(victim_sd);
+ if (IS_ERR(victim)) {
+ rc = PTR_ERR(victim);
+ victim = NULL;
+ goto out;
}
- mutex_unlock(&dir->d_inode->i_mutex);
- return res;
+ inode = victim->d_inode;
+ mutex_lock(&inode->i_mutex);
+ newattrs.ia_mode = (mode & S_IALLUGO) | (inode->i_mode & ~S_IALLUGO);
+ newattrs.ia_valid = ATTR_MODE | ATTR_CTIME;
+ rc = notify_change(victim, &newattrs);
+ mutex_unlock(&inode->i_mutex);
+ out:
+ dput(victim);
+ sysfs_put(victim_sd);
+ return rc;
}
EXPORT_SYMBOL_GPL(sysfs_chmod_file);
void sysfs_remove_file(struct kobject * kobj, const struct attribute * attr)
{
- sysfs_hash_and_remove(kobj->dentry, attr->name);
+ sysfs_hash_and_remove(kobj->sd, attr->name);
}
void sysfs_remove_file_from_group(struct kobject *kobj,
const struct attribute *attr, const char *group)
{
- struct dentry *dir;
+ struct sysfs_dirent *dir_sd;
- dir = lookup_one_len(group, kobj->dentry, strlen(group));
- if (!IS_ERR(dir)) {
- sysfs_hash_and_remove(dir, attr->name);
- dput(dir);
+ dir_sd = sysfs_get_dirent(kobj->sd, group);
+ if (dir_sd) {
+ sysfs_hash_and_remove(dir_sd, attr->name);
+ sysfs_put(dir_sd);
}
}
EXPORT_SYMBOL_GPL(sysfs_remove_file_from_group);
#include "sysfs.h"
-static void remove_files(struct dentry * dir,
- const struct attribute_group * grp)
+static void remove_files(struct sysfs_dirent *dir_sd,
+ const struct attribute_group *grp)
{
struct attribute *const* attr;
for (attr = grp->attrs; *attr; attr++)
- sysfs_hash_and_remove(dir,(*attr)->name);
+ sysfs_hash_and_remove(dir_sd, (*attr)->name);
}
-static int create_files(struct dentry * dir,
- const struct attribute_group * grp)
+static int create_files(struct sysfs_dirent *dir_sd,
+ const struct attribute_group *grp)
{
struct attribute *const* attr;
int error = 0;
- for (attr = grp->attrs; *attr && !error; attr++) {
- error = sysfs_add_file(dir, *attr, SYSFS_KOBJ_ATTR);
- }
+ for (attr = grp->attrs; *attr && !error; attr++)
+ error = sysfs_add_file(dir_sd, *attr, SYSFS_KOBJ_ATTR);
if (error)
- remove_files(dir,grp);
+ remove_files(dir_sd, grp);
return error;
}
int sysfs_create_group(struct kobject * kobj,
const struct attribute_group * grp)
{
- struct dentry * dir;
+ struct sysfs_dirent *sd;
int error;
- BUG_ON(!kobj || !kobj->dentry);
+ BUG_ON(!kobj || !kobj->sd);
if (grp->name) {
- error = sysfs_create_subdir(kobj,grp->name,&dir);
+ error = sysfs_create_subdir(kobj, grp->name, &sd);
if (error)
return error;
} else
- dir = kobj->dentry;
- dir = dget(dir);
- if ((error = create_files(dir,grp))) {
+ sd = kobj->sd;
+ sysfs_get(sd);
+ error = create_files(sd, grp);
+ if (error) {
if (grp->name)
- sysfs_remove_subdir(dir);
+ sysfs_remove_subdir(sd);
}
- dput(dir);
+ sysfs_put(sd);
return error;
}
void sysfs_remove_group(struct kobject * kobj,
const struct attribute_group * grp)
{
- struct dentry * dir;
+ struct sysfs_dirent *dir_sd = kobj->sd;
+ struct sysfs_dirent *sd;
if (grp->name) {
- dir = lookup_one_len_kern(grp->name, kobj->dentry,
- strlen(grp->name));
- BUG_ON(IS_ERR(dir));
- }
- else
- dir = dget(kobj->dentry);
+ sd = sysfs_get_dirent(dir_sd, grp->name);
+ BUG_ON(!sd);
+ } else
+ sd = sysfs_get(dir_sd);
- remove_files(dir,grp);
+ remove_files(sd, grp);
if (grp->name)
- sysfs_remove_subdir(dir);
- /* release the ref. taken in this routine */
- dput(dir);
+ sysfs_remove_subdir(sd);
+
+ sysfs_put(sd);
}
*/
static struct lock_class_key sysfs_inode_imutex_key;
-struct inode * sysfs_new_inode(mode_t mode, struct sysfs_dirent * sd)
+void sysfs_init_inode(struct sysfs_dirent *sd, struct inode *inode)
{
- struct inode * inode = new_inode(sysfs_sb);
- if (inode) {
- inode->i_blocks = 0;
- inode->i_mapping->a_ops = &sysfs_aops;
- inode->i_mapping->backing_dev_info = &sysfs_backing_dev_info;
- inode->i_op = &sysfs_inode_operations;
- inode->i_ino = sd->s_ino;
- lockdep_set_class(&inode->i_mutex, &sysfs_inode_imutex_key);
-
- if (sd->s_iattr) {
- /* sysfs_dirent has non-default attributes
- * get them for the new inode from persistent copy
- * in sysfs_dirent
- */
- set_inode_attr(inode, sd->s_iattr);
- } else
- set_default_inode_attr(inode, mode);
- }
- return inode;
-}
-
-int sysfs_create(struct dentry * dentry, int mode, int (*init)(struct inode *))
-{
- int error = 0;
- struct inode * inode = NULL;
- if (dentry) {
- if (!dentry->d_inode) {
- struct sysfs_dirent * sd = dentry->d_fsdata;
- if ((inode = sysfs_new_inode(mode, sd))) {
- if (dentry->d_parent && dentry->d_parent->d_inode) {
- struct inode *p_inode = dentry->d_parent->d_inode;
- p_inode->i_mtime = p_inode->i_ctime = CURRENT_TIME;
- }
- goto Proceed;
- }
- else
- error = -ENOMEM;
- } else
- error = -EEXIST;
- } else
- error = -ENOENT;
- goto Done;
-
- Proceed:
- if (init)
- error = init(inode);
- if (!error) {
- d_instantiate(dentry, inode);
- if (S_ISDIR(mode))
- dget(dentry); /* pin only directory dentry in core */
+ inode->i_blocks = 0;
+ inode->i_mapping->a_ops = &sysfs_aops;
+ inode->i_mapping->backing_dev_info = &sysfs_backing_dev_info;
+ inode->i_op = &sysfs_inode_operations;
+ inode->i_ino = sd->s_ino;
+ lockdep_set_class(&inode->i_mutex, &sysfs_inode_imutex_key);
+
+ if (sd->s_iattr) {
+ /* sysfs_dirent has non-default attributes
+ * get them for the new inode from persistent copy
+ * in sysfs_dirent
+ */
+ set_inode_attr(inode, sd->s_iattr);
} else
- iput(inode);
- Done:
- return error;
+ set_default_inode_attr(inode, sd->s_mode);
}
-/*
- * Get the name for corresponding element represented by the given sysfs_dirent
+/**
+ * sysfs_get_inode - get inode for sysfs_dirent
+ * @sd: sysfs_dirent to allocate inode for
+ *
+ * Get inode for @sd. If such inode doesn't exist, a new inode
+ * is allocated and basics are initialized. New inode is
+ * returned locked.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep).
+ *
+ * RETURNS:
+ * Pointer to allocated inode on success, NULL on failure.
*/
-const unsigned char * sysfs_get_name(struct sysfs_dirent *sd)
+struct inode * sysfs_get_inode(struct sysfs_dirent *sd)
{
- struct attribute * attr;
- struct bin_attribute * bin_attr;
- struct sysfs_symlink * sl;
-
- BUG_ON(!sd || !sd->s_element);
-
- switch (sd->s_type) {
- case SYSFS_DIR:
- /* Always have a dentry so use that */
- return sd->s_dentry->d_name.name;
-
- case SYSFS_KOBJ_ATTR:
- attr = sd->s_element;
- return attr->name;
-
- case SYSFS_KOBJ_BIN_ATTR:
- bin_attr = sd->s_element;
- return bin_attr->attr.name;
+ struct inode *inode;
- case SYSFS_KOBJ_LINK:
- sl = sd->s_element;
- return sl->link_name;
- }
- return NULL;
-}
+ inode = iget_locked(sysfs_sb, sd->s_ino);
+ if (inode && (inode->i_state & I_NEW))
+ sysfs_init_inode(sd, inode);
-static inline void orphan_all_buffers(struct inode *node)
-{
- struct sysfs_buffer_collection *set;
- struct sysfs_buffer *buf;
-
- mutex_lock_nested(&node->i_mutex, I_MUTEX_CHILD);
- set = node->i_private;
- if (set) {
- list_for_each_entry(buf, &set->associates, associates) {
- down(&buf->sem);
- buf->orphaned = 1;
- up(&buf->sem);
- }
- }
- mutex_unlock(&node->i_mutex);
+ return inode;
}
-
-/*
- * Unhashes the dentry corresponding to given sysfs_dirent
- * Called with parent inode's i_mutex held.
+/**
+ * sysfs_instantiate - instantiate dentry
+ * @dentry: dentry to be instantiated
+ * @inode: inode associated with @sd
+ *
+ * Unlock @inode if locked and instantiate @dentry with @inode.
+ *
+ * LOCKING:
+ * None.
*/
-void sysfs_drop_dentry(struct sysfs_dirent * sd, struct dentry * parent)
+void sysfs_instantiate(struct dentry *dentry, struct inode *inode)
{
- struct dentry *dentry = NULL;
- struct inode *inode;
+ BUG_ON(!dentry || dentry->d_inode);
- /* We're not holding a reference to ->s_dentry dentry but the
- * field will stay valid as long as sysfs_lock is held.
- */
- spin_lock(&sysfs_lock);
- spin_lock(&dcache_lock);
-
- /* dget dentry if it's still alive */
- if (sd->s_dentry && sd->s_dentry->d_inode)
- dentry = dget_locked(sd->s_dentry);
-
- spin_unlock(&dcache_lock);
- spin_unlock(&sysfs_lock);
-
- /* drop dentry */
- if (dentry) {
- spin_lock(&dcache_lock);
- spin_lock(&dentry->d_lock);
- if (!d_unhashed(dentry) && dentry->d_inode) {
- inode = dentry->d_inode;
- spin_lock(&inode->i_lock);
- __iget(inode);
- spin_unlock(&inode->i_lock);
- dget_locked(dentry);
- __d_drop(dentry);
- spin_unlock(&dentry->d_lock);
- spin_unlock(&dcache_lock);
- simple_unlink(parent->d_inode, dentry);
- orphan_all_buffers(inode);
- iput(inode);
- } else {
- spin_unlock(&dentry->d_lock);
- spin_unlock(&dcache_lock);
- }
+ if (inode->i_state & I_NEW)
+ unlock_new_inode(inode);
- dput(dentry);
- }
+ d_instantiate(dentry, inode);
}
-int sysfs_hash_and_remove(struct dentry * dir, const char * name)
+int sysfs_hash_and_remove(struct sysfs_dirent *dir_sd, const char *name)
{
- struct sysfs_dirent * sd;
- struct sysfs_dirent * parent_sd;
- int found = 0;
+ struct sysfs_addrm_cxt acxt;
+ struct sysfs_dirent **pos, *sd;
- if (!dir)
+ if (!dir_sd)
return -ENOENT;
- if (dir->d_inode == NULL)
- /* no inode means this hasn't been made visible yet */
- return -ENOENT;
+ sysfs_addrm_start(&acxt, dir_sd);
+
+ for (pos = &dir_sd->s_children; *pos; pos = &(*pos)->s_sibling) {
+ sd = *pos;
- parent_sd = dir->d_fsdata;
- mutex_lock_nested(&dir->d_inode->i_mutex, I_MUTEX_PARENT);
- list_for_each_entry(sd, &parent_sd->s_children, s_sibling) {
- if (!sd->s_element)
+ if (!sysfs_type(sd))
continue;
- if (!strcmp(sysfs_get_name(sd), name)) {
- list_del_init(&sd->s_sibling);
- sysfs_drop_dentry(sd, dir);
- sysfs_put(sd);
- found = 1;
+ if (!strcmp(sd->s_name, name)) {
+ *pos = sd->s_sibling;
+ sd->s_sibling = NULL;
+ sysfs_remove_one(&acxt, sd);
break;
}
}
- mutex_unlock(&dir->d_inode->i_mutex);
- return found ? 0 : -ENOENT;
+ if (sysfs_addrm_finish(&acxt))
+ return 0;
+ return -ENOENT;
}
struct super_block * sysfs_sb = NULL;
struct kmem_cache *sysfs_dir_cachep;
-static void sysfs_clear_inode(struct inode *inode);
-
static const struct super_operations sysfs_ops = {
.statfs = simple_statfs,
.drop_inode = sysfs_delete_inode,
- .clear_inode = sysfs_clear_inode,
};
-static struct sysfs_dirent sysfs_root = {
- .s_sibling = LIST_HEAD_INIT(sysfs_root.s_sibling),
- .s_children = LIST_HEAD_INIT(sysfs_root.s_children),
- .s_element = NULL,
- .s_type = SYSFS_ROOT,
- .s_iattr = NULL,
+struct sysfs_dirent sysfs_root = {
+ .s_count = ATOMIC_INIT(1),
+ .s_flags = SYSFS_ROOT,
+ .s_mode = S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO,
.s_ino = 1,
};
-static void sysfs_clear_inode(struct inode *inode)
-{
- kfree(inode->i_private);
-}
-
static int sysfs_fill_super(struct super_block *sb, void *data, int silent)
{
struct inode *inode;
sb->s_time_gran = 1;
sysfs_sb = sb;
- inode = sysfs_new_inode(S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO,
- &sysfs_root);
- if (inode) {
- inode->i_op = &sysfs_dir_inode_operations;
- inode->i_fop = &sysfs_dir_operations;
- /* directory inodes start off with i_nlink == 2 (for "." entry) */
- inc_nlink(inode);
- } else {
+ inode = new_inode(sysfs_sb);
+ if (!inode) {
pr_debug("sysfs: could not get root inode\n");
return -ENOMEM;
}
+ sysfs_init_inode(&sysfs_root, inode);
+
+ inode->i_op = &sysfs_dir_inode_operations;
+ inode->i_fop = &sysfs_dir_operations;
+ /* directory inodes start off with i_nlink == 2 (for "." entry) */
+ inc_nlink(inode);
+
root = d_alloc_root(inode);
if (!root) {
pr_debug("%s: could not get root dentry!\n",__FUNCTION__);
iput(inode);
return -ENOMEM;
}
+ sysfs_root.s_dentry = root;
root->d_fsdata = &sysfs_root;
sb->s_root = root;
return 0;
#include "sysfs.h"
-static int object_depth(struct kobject * kobj)
+static int object_depth(struct sysfs_dirent *sd)
{
- struct kobject * p = kobj;
int depth = 0;
- do { depth++; } while ((p = p->parent));
+
+ for (; sd->s_parent; sd = sd->s_parent)
+ depth++;
+
return depth;
}
-static int object_path_length(struct kobject * kobj)
+static int object_path_length(struct sysfs_dirent * sd)
{
- struct kobject * p = kobj;
int length = 1;
- do {
- length += strlen(kobject_name(p)) + 1;
- p = p->parent;
- } while (p);
+
+ for (; sd->s_parent; sd = sd->s_parent)
+ length += strlen(sd->s_name) + 1;
+
return length;
}
-static void fill_object_path(struct kobject * kobj, char * buffer, int length)
+static void fill_object_path(struct sysfs_dirent *sd, char *buffer, int length)
{
- struct kobject * p;
-
--length;
- for (p = kobj; p; p = p->parent) {
- int cur = strlen(kobject_name(p));
+ for (; sd->s_parent; sd = sd->s_parent) {
+ int cur = strlen(sd->s_name);
/* back up enough to print this bus id with '/' */
length -= cur;
- strncpy(buffer + length,kobject_name(p),cur);
+ strncpy(buffer + length, sd->s_name, cur);
*(buffer + --length) = '/';
}
}
-static int sysfs_add_link(struct dentry * parent, const char * name, struct kobject * target)
-{
- struct sysfs_dirent * parent_sd = parent->d_fsdata;
- struct sysfs_symlink * sl;
- int error = 0;
-
- error = -ENOMEM;
- sl = kmalloc(sizeof(*sl), GFP_KERNEL);
- if (!sl)
- goto exit1;
-
- sl->link_name = kmalloc(strlen(name) + 1, GFP_KERNEL);
- if (!sl->link_name)
- goto exit2;
-
- strcpy(sl->link_name, name);
- sl->target_kobj = kobject_get(target);
-
- error = sysfs_make_dirent(parent_sd, NULL, sl, S_IFLNK|S_IRWXUGO,
- SYSFS_KOBJ_LINK);
- if (!error)
- return 0;
-
- kobject_put(target);
- kfree(sl->link_name);
-exit2:
- kfree(sl);
-exit1:
- return error;
-}
-
/**
* sysfs_create_link - create symlink between two objects.
* @kobj: object whose directory we're creating the link in.
*/
int sysfs_create_link(struct kobject * kobj, struct kobject * target, const char * name)
{
- struct dentry *dentry = NULL;
- int error = -EEXIST;
+ struct sysfs_dirent *parent_sd = NULL;
+ struct sysfs_dirent *target_sd = NULL;
+ struct sysfs_dirent *sd = NULL;
+ struct sysfs_addrm_cxt acxt;
+ int error;
BUG_ON(!name);
if (!kobj) {
if (sysfs_mount && sysfs_mount->mnt_sb)
- dentry = sysfs_mount->mnt_sb->s_root;
+ parent_sd = sysfs_mount->mnt_sb->s_root->d_fsdata;
} else
- dentry = kobj->dentry;
+ parent_sd = kobj->sd;
+
+ error = -EFAULT;
+ if (!parent_sd)
+ goto out_put;
+
+ /* target->sd can go away beneath us but is protected with
+ * sysfs_assoc_lock. Fetch target_sd from it.
+ */
+ spin_lock(&sysfs_assoc_lock);
+ if (target->sd)
+ target_sd = sysfs_get(target->sd);
+ spin_unlock(&sysfs_assoc_lock);
+
+ error = -ENOENT;
+ if (!target_sd)
+ goto out_put;
+
+ error = -ENOMEM;
+ sd = sysfs_new_dirent(name, S_IFLNK|S_IRWXUGO, SYSFS_KOBJ_LINK);
+ if (!sd)
+ goto out_put;
+ sd->s_elem.symlink.target_sd = target_sd;
- if (!dentry)
- return -EFAULT;
+ sysfs_addrm_start(&acxt, parent_sd);
- mutex_lock(&dentry->d_inode->i_mutex);
- if (!sysfs_dirent_exist(dentry->d_fsdata, name))
- error = sysfs_add_link(dentry, name, target);
- mutex_unlock(&dentry->d_inode->i_mutex);
+ if (!sysfs_find_dirent(parent_sd, name)) {
+ sysfs_add_one(&acxt, sd);
+ sysfs_link_sibling(sd);
+ }
+
+ if (sysfs_addrm_finish(&acxt))
+ return 0;
+
+ error = -EEXIST;
+ /* fall through */
+ out_put:
+ sysfs_put(target_sd);
+ sysfs_put(sd);
return error;
}
void sysfs_remove_link(struct kobject * kobj, const char * name)
{
- sysfs_hash_and_remove(kobj->dentry,name);
+ sysfs_hash_and_remove(kobj->sd, name);
}
-static int sysfs_get_target_path(struct kobject * kobj, struct kobject * target,
- char *path)
+static int sysfs_get_target_path(struct sysfs_dirent * parent_sd,
+ struct sysfs_dirent * target_sd, char *path)
{
char * s;
int depth, size;
- depth = object_depth(kobj);
- size = object_path_length(target) + depth * 3 - 1;
+ depth = object_depth(parent_sd);
+ size = object_path_length(target_sd) + depth * 3 - 1;
if (size > PATH_MAX)
return -ENAMETOOLONG;
for (s = path; depth--; s += 3)
strcpy(s,"../");
- fill_object_path(target, path, size);
+ fill_object_path(target_sd, path, size);
pr_debug("%s: path = '%s'\n", __FUNCTION__, path);
return 0;
static int sysfs_getlink(struct dentry *dentry, char * path)
{
- struct kobject *kobj, *target_kobj;
- int error = 0;
+ struct sysfs_dirent *sd = dentry->d_fsdata;
+ struct sysfs_dirent *parent_sd = sd->s_parent;
+ struct sysfs_dirent *target_sd = sd->s_elem.symlink.target_sd;
+ int error;
- kobj = sysfs_get_kobject(dentry->d_parent);
- if (!kobj)
- return -EINVAL;
+ mutex_lock(&sysfs_mutex);
+ error = sysfs_get_target_path(parent_sd, target_sd, path);
+ mutex_unlock(&sysfs_mutex);
- target_kobj = sysfs_get_kobject(dentry);
- if (!target_kobj) {
- kobject_put(kobj);
- return -EINVAL;
- }
-
- down_read(&sysfs_rename_sem);
- error = sysfs_get_target_path(kobj, target_kobj, path);
- up_read(&sysfs_rename_sem);
-
- kobject_put(kobj);
- kobject_put(target_kobj);
return error;
-
}
static void *sysfs_follow_link(struct dentry *dentry, struct nameidata *nd)
+struct sysfs_elem_dir {
+ struct kobject * kobj;
+};
+
+struct sysfs_elem_symlink {
+ struct sysfs_dirent * target_sd;
+};
+
+struct sysfs_elem_attr {
+ struct attribute * attr;
+};
+
+struct sysfs_elem_bin_attr {
+ struct bin_attribute * bin_attr;
+};
+
+/*
+ * As long as s_count reference is held, the sysfs_dirent itself is
+ * accessible. Dereferencing s_elem or any other outer entity
+ * requires s_active reference.
+ */
struct sysfs_dirent {
atomic_t s_count;
- struct list_head s_sibling;
- struct list_head s_children;
- void * s_element;
- int s_type;
+ atomic_t s_active;
+ struct sysfs_dirent * s_parent;
+ struct sysfs_dirent * s_sibling;
+ struct sysfs_dirent * s_children;
+ const char * s_name;
+
+ union {
+ struct sysfs_elem_dir dir;
+ struct sysfs_elem_symlink symlink;
+ struct sysfs_elem_attr attr;
+ struct sysfs_elem_bin_attr bin_attr;
+ } s_elem;
+
+ unsigned int s_flags;
umode_t s_mode;
ino_t s_ino;
struct dentry * s_dentry;
atomic_t s_event;
};
+#define SD_DEACTIVATED_BIAS INT_MIN
+
+struct sysfs_addrm_cxt {
+ struct sysfs_dirent *parent_sd;
+ struct inode *parent_inode;
+ struct sysfs_dirent *removed;
+ int cnt;
+};
+
extern struct vfsmount * sysfs_mount;
+extern struct sysfs_dirent sysfs_root;
extern struct kmem_cache *sysfs_dir_cachep;
-extern void sysfs_delete_inode(struct inode *inode);
-extern struct inode * sysfs_new_inode(mode_t mode, struct sysfs_dirent *);
-extern int sysfs_create(struct dentry *, int mode, int (*init)(struct inode *));
+extern struct dentry *sysfs_get_dentry(struct sysfs_dirent *sd);
+extern void sysfs_link_sibling(struct sysfs_dirent *sd);
+extern void sysfs_unlink_sibling(struct sysfs_dirent *sd);
+extern struct sysfs_dirent *sysfs_get_active(struct sysfs_dirent *sd);
+extern void sysfs_put_active(struct sysfs_dirent *sd);
+extern struct sysfs_dirent *sysfs_get_active_two(struct sysfs_dirent *sd);
+extern void sysfs_put_active_two(struct sysfs_dirent *sd);
+extern void sysfs_addrm_start(struct sysfs_addrm_cxt *acxt,
+ struct sysfs_dirent *parent_sd);
+extern void sysfs_add_one(struct sysfs_addrm_cxt *acxt,
+ struct sysfs_dirent *sd);
+extern void sysfs_remove_one(struct sysfs_addrm_cxt *acxt,
+ struct sysfs_dirent *sd);
+extern int sysfs_addrm_finish(struct sysfs_addrm_cxt *acxt);
-extern int sysfs_dirent_exist(struct sysfs_dirent *, const unsigned char *);
-extern int sysfs_make_dirent(struct sysfs_dirent *, struct dentry *, void *,
- umode_t, int);
-
-extern int sysfs_add_file(struct dentry *, const struct attribute *, int);
-extern int sysfs_hash_and_remove(struct dentry * dir, const char * name);
+extern void sysfs_delete_inode(struct inode *inode);
+extern void sysfs_init_inode(struct sysfs_dirent *sd, struct inode *inode);
+extern struct inode * sysfs_get_inode(struct sysfs_dirent *sd);
+extern void sysfs_instantiate(struct dentry *dentry, struct inode *inode);
+
+extern void release_sysfs_dirent(struct sysfs_dirent * sd);
+extern struct sysfs_dirent *sysfs_find_dirent(struct sysfs_dirent *parent_sd,
+ const unsigned char *name);
+extern struct sysfs_dirent *sysfs_get_dirent(struct sysfs_dirent *parent_sd,
+ const unsigned char *name);
+extern struct sysfs_dirent *sysfs_new_dirent(const char *name, umode_t mode,
+ int type);
+
+extern int sysfs_add_file(struct sysfs_dirent *dir_sd,
+ const struct attribute *attr, int type);
+extern int sysfs_hash_and_remove(struct sysfs_dirent *dir_sd, const char *name);
extern struct sysfs_dirent *sysfs_find(struct sysfs_dirent *dir, const char * name);
-extern int sysfs_create_subdir(struct kobject *, const char *, struct dentry **);
-extern void sysfs_remove_subdir(struct dentry *);
+extern int sysfs_create_subdir(struct kobject *kobj, const char *name,
+ struct sysfs_dirent **p_sd);
+extern void sysfs_remove_subdir(struct sysfs_dirent *sd);
-extern const unsigned char * sysfs_get_name(struct sysfs_dirent *sd);
-extern void sysfs_drop_dentry(struct sysfs_dirent *sd, struct dentry *parent);
extern int sysfs_setattr(struct dentry *dentry, struct iattr *iattr);
-extern spinlock_t sysfs_lock;
-extern struct rw_semaphore sysfs_rename_sem;
+extern spinlock_t sysfs_assoc_lock;
+extern struct mutex sysfs_mutex;
extern struct super_block * sysfs_sb;
extern const struct file_operations sysfs_dir_operations;
extern const struct file_operations sysfs_file_operations;
extern const struct inode_operations sysfs_dir_inode_operations;
extern const struct inode_operations sysfs_symlink_inode_operations;
-struct sysfs_symlink {
- char * link_name;
- struct kobject * target_kobj;
-};
-
-struct sysfs_buffer {
- struct list_head associates;
- size_t count;
- loff_t pos;
- char * page;
- struct sysfs_ops * ops;
- struct semaphore sem;
- int orphaned;
- int needs_read_fill;
- int event;
-};
-
-struct sysfs_buffer_collection {
- struct list_head associates;
-};
-
-static inline struct kobject * to_kobj(struct dentry * dentry)
-{
- struct sysfs_dirent * sd = dentry->d_fsdata;
- return ((struct kobject *) sd->s_element);
-}
-
-static inline struct attribute * to_attr(struct dentry * dentry)
+static inline unsigned int sysfs_type(struct sysfs_dirent *sd)
{
- struct sysfs_dirent * sd = dentry->d_fsdata;
- return ((struct attribute *) sd->s_element);
-}
-
-static inline struct bin_attribute * to_bin_attr(struct dentry * dentry)
-{
- struct sysfs_dirent * sd = dentry->d_fsdata;
- return ((struct bin_attribute *) sd->s_element);
-}
-
-static inline struct kobject *sysfs_get_kobject(struct dentry *dentry)
-{
- struct kobject * kobj = NULL;
-
- spin_lock(&dcache_lock);
- if (!d_unhashed(dentry)) {
- struct sysfs_dirent * sd = dentry->d_fsdata;
- if (sd->s_type & SYSFS_KOBJ_LINK) {
- struct sysfs_symlink * sl = sd->s_element;
- kobj = kobject_get(sl->target_kobj);
- } else
- kobj = kobject_get(sd->s_element);
- }
- spin_unlock(&dcache_lock);
-
- return kobj;
-}
-
-static inline void release_sysfs_dirent(struct sysfs_dirent * sd)
-{
- if (sd->s_type & SYSFS_KOBJ_LINK) {
- struct sysfs_symlink * sl = sd->s_element;
- kfree(sl->link_name);
- kobject_put(sl->target_kobj);
- kfree(sl);
- }
- kfree(sd->s_iattr);
- kmem_cache_free(sysfs_dir_cachep, sd);
+ return sd->s_flags & SYSFS_TYPE_MASK;
}
static inline struct sysfs_dirent * sysfs_get(struct sysfs_dirent * sd)
static inline void sysfs_put(struct sysfs_dirent * sd)
{
- if (atomic_dec_and_test(&sd->s_count))
+ if (sd && atomic_dec_and_test(&sd->s_count))
release_sysfs_dirent(sd);
}
void debugfs_remove(struct dentry *dentry);
+struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
+ struct dentry *new_dir, const char *new_name);
+
struct dentry *debugfs_create_u8(const char *name, mode_t mode,
struct dentry *parent, u8 *value);
struct dentry *debugfs_create_u16(const char *name, mode_t mode,
static inline void debugfs_remove(struct dentry *dentry)
{ }
+static inline struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
+ struct dentry *new_dir, char *new_name)
+{
+ return ERR_PTR(-ENODEV);
+}
+
static inline struct dentry *debugfs_create_u8(const char *name, mode_t mode,
struct dentry *parent,
u8 *value)
* @devt: for internal use by the driver core only.
* @node: for internal use by the driver core only.
* @kobj: for internal use by the driver core only.
- * @devt_attr: for internal use by the driver core only.
* @groups: optional additional groups to be created
* @dev: if set, a symlink to the struct device is created in the sysfs
* directory for this struct class device.
struct kobject kobj;
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 */
struct class_device *parent; /* parent of this child device, if there is one */
struct device_type *type;
unsigned is_registered:1;
unsigned uevent_suppress:1;
- struct device_attribute uevent_attr;
- struct device_attribute *devt_attr;
struct semaphore sem; /* semaphore to synchronize calls to
* its driver.
DMI_PRODUCT_NAME,
DMI_PRODUCT_VERSION,
DMI_PRODUCT_SERIAL,
+ DMI_PRODUCT_UUID,
DMI_BOARD_VENDOR,
DMI_BOARD_NAME,
DMI_BOARD_VERSION,
+ DMI_BOARD_SERIAL,
+ DMI_BOARD_ASSET_TAG,
+ DMI_CHASSIS_VENDOR,
+ DMI_CHASSIS_TYPE,
+ DMI_CHASSIS_VERSION,
+ DMI_CHASSIS_SERIAL,
+ DMI_CHASSIS_ASSET_TAG,
DMI_STRING_MAX,
};
void idr_destroy(struct idr *idp);
void idr_init(struct idr *idp);
+
+/*
+ * IDA - IDR based id allocator, use when translation from id to
+ * pointer isn't necessary.
+ */
+#define IDA_CHUNK_SIZE 128 /* 128 bytes per chunk */
+#define IDA_BITMAP_LONGS (128 / sizeof(long) - 1)
+#define IDA_BITMAP_BITS (IDA_BITMAP_LONGS * sizeof(long) * 8)
+
+struct ida_bitmap {
+ long nr_busy;
+ unsigned long bitmap[IDA_BITMAP_LONGS];
+};
+
+struct ida {
+ struct idr idr;
+ struct ida_bitmap *free_bitmap;
+};
+
+#define IDA_INIT(name) { .idr = IDR_INIT(name), .free_bitmap = NULL, }
+#define DEFINE_IDA(name) struct ida name = IDA_INIT(name)
+
+int ida_pre_get(struct ida *ida, gfp_t gfp_mask);
+int ida_get_new_above(struct ida *ida, int starting_id, int *p_id);
+int ida_get_new(struct ida *ida, int *p_id);
+void ida_remove(struct ida *ida, int id);
+void ida_destroy(struct ida *ida);
+void ida_init(struct ida *ida);
+
#endif /* __IDR_H__ */
struct kobject * parent;
struct kset * kset;
struct kobj_type * ktype;
- struct dentry * dentry;
+ struct sysfs_dirent * sd;
wait_queue_head_t poll;
};
extern void kobject_cleanup(struct kobject *);
extern int __must_check kobject_add(struct kobject *);
-extern int __must_check kobject_shadow_add(struct kobject *, struct dentry *);
+extern int __must_check kobject_shadow_add(struct kobject *kobj,
+ struct sysfs_dirent *shadow_parent);
extern void kobject_del(struct kobject *);
extern int __must_check kobject_rename(struct kobject *, const char *new_name);
extern int __must_check kobject_shadow_rename(struct kobject *kobj,
- struct dentry *new_parent,
- const char *new_name);
+ struct sysfs_dirent *new_parent,
+ const char *new_name);
extern int __must_check kobject_move(struct kobject *, struct kobject *);
extern int __must_check kobject_register(struct kobject *);
unsigned can_wakeup:1;
#ifdef CONFIG_PM
unsigned should_wakeup:1;
- pm_message_t prev_state;
- void * saved_state;
- struct device * pm_parent;
struct list_head entry;
#endif
};
-extern void device_pm_set_parent(struct device * dev, struct device * parent);
-
extern int device_power_down(pm_message_t state);
extern void device_power_up(void);
extern void device_resume(void);
#define _SYSDEV_ATTR(_name,_mode,_show,_store) \
{ \
- .attr = { .name = __stringify(_name), .mode = _mode, \
- .owner = THIS_MODULE }, \
+ .attr = { .name = __stringify(_name), .mode = _mode }, \
.show = _show, \
.store = _store, \
}
struct module;
struct nameidata;
struct dentry;
+struct sysfs_dirent;
+/* FIXME
+ * The *owner field is no longer used, but leave around
+ * until the tree gets cleaned up fully.
+ */
struct attribute {
const char * name;
- struct module * owner;
+ struct module * owner;
mode_t mode;
};
*/
#define __ATTR(_name,_mode,_show,_store) { \
- .attr = {.name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE }, \
+ .attr = {.name = __stringify(_name), .mode = _mode }, \
.show = _show, \
.store = _store, \
}
#define __ATTR_RO(_name) { \
- .attr = { .name = __stringify(_name), .mode = 0444, .owner = THIS_MODULE }, \
- .show = _name##_show, \
+ .attr = { .name = __stringify(_name), .mode = 0444 }, \
+ .show = _name##_show, \
}
#define __ATTR_NULL { .attr = { .name = NULL } }
struct attribute attr;
size_t size;
void *private;
- ssize_t (*read)(struct kobject *, char *, loff_t, size_t);
- ssize_t (*write)(struct kobject *, char *, loff_t, size_t);
+ ssize_t (*read)(struct kobject *, struct bin_attribute *,
+ char *, loff_t, size_t);
+ ssize_t (*write)(struct kobject *, struct bin_attribute *,
+ char *, loff_t, size_t);
int (*mmap)(struct kobject *, struct bin_attribute *attr,
struct vm_area_struct *vma);
};
ssize_t (*store)(struct kobject *,struct attribute *,const char *, size_t);
};
+#define SYSFS_TYPE_MASK 0x00ff
#define SYSFS_ROOT 0x0001
#define SYSFS_DIR 0x0002
#define SYSFS_KOBJ_ATTR 0x0004
#define SYSFS_KOBJ_BIN_ATTR 0x0008
#define SYSFS_KOBJ_LINK 0x0020
-#define SYSFS_NOT_PINNED (SYSFS_KOBJ_ATTR | SYSFS_KOBJ_BIN_ATTR | SYSFS_KOBJ_LINK)
+#define SYSFS_COPY_NAME (SYSFS_DIR | SYSFS_KOBJ_LINK)
+
+#define SYSFS_FLAG_MASK ~SYSFS_TYPE_MASK
+#define SYSFS_FLAG_REMOVED 0x0100
#ifdef CONFIG_SYSFS
void (*func)(void *), void *data, struct module *owner);
extern int __must_check
-sysfs_create_dir(struct kobject *, struct dentry *);
+sysfs_create_dir(struct kobject *kobj, struct sysfs_dirent *shadow_parent_sd);
extern void
sysfs_remove_dir(struct kobject *);
extern int __must_check
-sysfs_rename_dir(struct kobject *, struct dentry *, const char *new_name);
+sysfs_rename_dir(struct kobject *kobj, struct sysfs_dirent *new_parent_sd,
+ const char *new_name);
extern int __must_check
sysfs_move_dir(struct kobject *, struct kobject *);
extern int sysfs_make_shadowed_dir(struct kobject *kobj,
void * (*follow_link)(struct dentry *, struct nameidata *));
-extern struct dentry *sysfs_create_shadow_dir(struct kobject *kobj);
-extern void sysfs_remove_shadow_dir(struct dentry *dir);
+extern struct sysfs_dirent *sysfs_create_shadow_dir(struct kobject *kobj);
+extern void sysfs_remove_shadow_dir(struct sysfs_dirent *shadow_sd);
extern int __must_check sysfs_init(void);
return -ENOSYS;
}
-static inline int sysfs_create_dir(struct kobject * k, struct dentry *shadow)
+static inline int sysfs_create_dir(struct kobject *kobj,
+ struct sysfs_dirent *shadow_parent_sd)
{
return 0;
}
;
}
-static inline int sysfs_rename_dir(struct kobject * k,
- struct dentry *new_parent,
- const char *new_name)
+static inline int sysfs_rename_dir(struct kobject *kobj,
+ struct sysfs_dirent *new_parent_sd,
+ const char *new_name)
{
return 0;
}
mod->field = NULL; \
} \
static struct module_attribute modinfo_##field = { \
- .attr = { .name = __stringify(field), .mode = 0444, \
- .owner = THIS_MODULE }, \
+ .attr = { .name = __stringify(field), .mode = 0444 }, \
.show = show_modinfo_##field, \
.setup = setup_modinfo_##field, \
.test = modinfo_##field##_exists, \
}
static struct module_attribute refcnt = {
- .attr = { .name = "refcnt", .mode = 0444, .owner = THIS_MODULE },
+ .attr = { .name = "refcnt", .mode = 0444 },
.show = show_refcnt,
};
}
static struct module_attribute initstate = {
- .attr = { .name = "initstate", .mode = 0444, .owner = THIS_MODULE },
+ .attr = { .name = "initstate", .mode = 0444 },
.show = show_initstate,
};
sattr->mattr.show = module_sect_show;
sattr->mattr.store = NULL;
sattr->mattr.attr.name = sattr->name;
- sattr->mattr.attr.owner = mod;
sattr->mattr.attr.mode = S_IRUGO;
*(gattr++) = &(sattr++)->mattr.attr;
}
if (!attr->test ||
(attr->test && attr->test(mod))) {
memcpy(temp_attr, attr, sizeof(*temp_attr));
- temp_attr->attr.owner = mod;
error = sysfs_create_file(&mod->mkobj.kobj,&temp_attr->attr);
++temp_attr;
}
pattr->mattr.show = param_attr_show;
pattr->mattr.store = param_attr_store;
pattr->mattr.attr.name = (char *)&kp->name[name_skip];
- pattr->mattr.attr.owner = mk->mod;
pattr->mattr.attr.mode = kp->perm;
*(gattr++) = &(pattr++)->mattr.attr;
}
spin_unlock_irqrestore(&idp->lock, flags);
}
+static void idr_mark_full(struct idr_layer **pa, int id)
+{
+ struct idr_layer *p = pa[0];
+ int l = 0;
+
+ __set_bit(id & IDR_MASK, &p->bitmap);
+ /*
+ * If this layer is full mark the bit in the layer above to
+ * show that this part of the radix tree is full. This may
+ * complete the layer above and require walking up the radix
+ * tree.
+ */
+ while (p->bitmap == IDR_FULL) {
+ if (!(p = pa[++l]))
+ break;
+ id = id >> IDR_BITS;
+ __set_bit((id & IDR_MASK), &p->bitmap);
+ }
+}
+
/**
* idr_pre_get - reserver resources for idr allocation
* @idp: idr handle
}
EXPORT_SYMBOL(idr_pre_get);
-static int sub_alloc(struct idr *idp, void *ptr, int *starting_id)
+static int sub_alloc(struct idr *idp, int *starting_id, struct idr_layer **pa)
{
int n, m, sh;
struct idr_layer *p, *new;
- struct idr_layer *pa[MAX_LEVEL];
- int l, id;
+ int l, id, oid;
long bm;
id = *starting_id;
+ restart:
p = idp->top;
l = idp->layers;
pa[l--] = NULL;
if (m == IDR_SIZE) {
/* no space available go back to previous layer. */
l++;
+ oid = id;
id = (id | ((1 << (IDR_BITS * l)) - 1)) + 1;
+
+ /* if already at the top layer, we need to grow */
if (!(p = pa[l])) {
*starting_id = id;
return -2;
}
- continue;
+
+ /* If we need to go up one layer, continue the
+ * loop; otherwise, restart from the top.
+ */
+ sh = IDR_BITS * (l + 1);
+ if (oid >> sh == id >> sh)
+ continue;
+ else
+ goto restart;
}
if (m != n) {
sh = IDR_BITS*l;
pa[l--] = p;
p = p->ary[m];
}
- /*
- * We have reached the leaf node, plant the
- * users pointer and return the raw id.
- */
- p->ary[m] = (struct idr_layer *)ptr;
- __set_bit(m, &p->bitmap);
- p->count++;
- /*
- * If this layer is full mark the bit in the layer above
- * to show that this part of the radix tree is full.
- * This may complete the layer above and require walking
- * up the radix tree.
- */
- n = id;
- while (p->bitmap == IDR_FULL) {
- if (!(p = pa[++l]))
- break;
- n = n >> IDR_BITS;
- __set_bit((n & IDR_MASK), &p->bitmap);
- }
- return(id);
+
+ pa[l] = p;
+ return id;
}
-static int idr_get_new_above_int(struct idr *idp, void *ptr, int starting_id)
+static int idr_get_empty_slot(struct idr *idp, int starting_id,
+ struct idr_layer **pa)
{
struct idr_layer *p, *new;
int layers, v, id;
}
idp->top = p;
idp->layers = layers;
- v = sub_alloc(idp, ptr, &id);
+ v = sub_alloc(idp, &id, pa);
if (v == -2)
goto build_up;
return(v);
}
+static int idr_get_new_above_int(struct idr *idp, void *ptr, int starting_id)
+{
+ struct idr_layer *pa[MAX_LEVEL];
+ int id;
+
+ id = idr_get_empty_slot(idp, starting_id, pa);
+ if (id >= 0) {
+ /*
+ * Successfully found an empty slot. Install the user
+ * pointer and mark the slot full.
+ */
+ pa[0]->ary[id & IDR_MASK] = (struct idr_layer *)ptr;
+ pa[0]->count++;
+ idr_mark_full(pa, id);
+ }
+
+ return id;
+}
+
/**
* idr_get_new_above - allocate new idr entry above or equal to a start id
* @idp: idr handle
spin_lock_init(&idp->lock);
}
EXPORT_SYMBOL(idr_init);
+
+
+/*
+ * IDA - IDR based ID allocator
+ *
+ * this is id allocator without id -> pointer translation. Memory
+ * usage is much lower than full blown idr because each id only
+ * occupies a bit. ida uses a custom leaf node which contains
+ * IDA_BITMAP_BITS slots.
+ *
+ * 2007-04-25 written by Tejun Heo <htejun@gmail.com>
+ */
+
+static void free_bitmap(struct ida *ida, struct ida_bitmap *bitmap)
+{
+ unsigned long flags;
+
+ if (!ida->free_bitmap) {
+ spin_lock_irqsave(&ida->idr.lock, flags);
+ if (!ida->free_bitmap) {
+ ida->free_bitmap = bitmap;
+ bitmap = NULL;
+ }
+ spin_unlock_irqrestore(&ida->idr.lock, flags);
+ }
+
+ kfree(bitmap);
+}
+
+/**
+ * ida_pre_get - reserve resources for ida allocation
+ * @ida: ida handle
+ * @gfp_mask: memory allocation flag
+ *
+ * This function should be called prior to locking and calling the
+ * following function. It preallocates enough memory to satisfy the
+ * worst possible allocation.
+ *
+ * If the system is REALLY out of memory this function returns 0,
+ * otherwise 1.
+ */
+int ida_pre_get(struct ida *ida, gfp_t gfp_mask)
+{
+ /* allocate idr_layers */
+ if (!idr_pre_get(&ida->idr, gfp_mask))
+ return 0;
+
+ /* allocate free_bitmap */
+ if (!ida->free_bitmap) {
+ struct ida_bitmap *bitmap;
+
+ bitmap = kmalloc(sizeof(struct ida_bitmap), gfp_mask);
+ if (!bitmap)
+ return 0;
+
+ free_bitmap(ida, bitmap);
+ }
+
+ return 1;
+}
+EXPORT_SYMBOL(ida_pre_get);
+
+/**
+ * ida_get_new_above - allocate new ID above or equal to a start id
+ * @ida: ida handle
+ * @staring_id: id to start search at
+ * @p_id: pointer to the allocated handle
+ *
+ * Allocate new ID above or equal to @ida. It should be called with
+ * any required locks.
+ *
+ * If memory is required, it will return -EAGAIN, you should unlock
+ * and go back to the ida_pre_get() call. If the ida is full, it will
+ * return -ENOSPC.
+ *
+ * @p_id returns a value in the range 0 ... 0x7fffffff.
+ */
+int ida_get_new_above(struct ida *ida, int starting_id, int *p_id)
+{
+ struct idr_layer *pa[MAX_LEVEL];
+ struct ida_bitmap *bitmap;
+ unsigned long flags;
+ int idr_id = starting_id / IDA_BITMAP_BITS;
+ int offset = starting_id % IDA_BITMAP_BITS;
+ int t, id;
+
+ restart:
+ /* get vacant slot */
+ t = idr_get_empty_slot(&ida->idr, idr_id, pa);
+ if (t < 0) {
+ if (t == -1)
+ return -EAGAIN;
+ else /* will be -3 */
+ return -ENOSPC;
+ }
+
+ if (t * IDA_BITMAP_BITS >= MAX_ID_BIT)
+ return -ENOSPC;
+
+ if (t != idr_id)
+ offset = 0;
+ idr_id = t;
+
+ /* if bitmap isn't there, create a new one */
+ bitmap = (void *)pa[0]->ary[idr_id & IDR_MASK];
+ if (!bitmap) {
+ spin_lock_irqsave(&ida->idr.lock, flags);
+ bitmap = ida->free_bitmap;
+ ida->free_bitmap = NULL;
+ spin_unlock_irqrestore(&ida->idr.lock, flags);
+
+ if (!bitmap)
+ return -EAGAIN;
+
+ memset(bitmap, 0, sizeof(struct ida_bitmap));
+ pa[0]->ary[idr_id & IDR_MASK] = (void *)bitmap;
+ pa[0]->count++;
+ }
+
+ /* lookup for empty slot */
+ t = find_next_zero_bit(bitmap->bitmap, IDA_BITMAP_BITS, offset);
+ if (t == IDA_BITMAP_BITS) {
+ /* no empty slot after offset, continue to the next chunk */
+ idr_id++;
+ offset = 0;
+ goto restart;
+ }
+
+ id = idr_id * IDA_BITMAP_BITS + t;
+ if (id >= MAX_ID_BIT)
+ return -ENOSPC;
+
+ __set_bit(t, bitmap->bitmap);
+ if (++bitmap->nr_busy == IDA_BITMAP_BITS)
+ idr_mark_full(pa, idr_id);
+
+ *p_id = id;
+
+ /* Each leaf node can handle nearly a thousand slots and the
+ * whole idea of ida is to have small memory foot print.
+ * Throw away extra resources one by one after each successful
+ * allocation.
+ */
+ if (ida->idr.id_free_cnt || ida->free_bitmap) {
+ struct idr_layer *p = alloc_layer(&ida->idr);
+ if (p)
+ kmem_cache_free(idr_layer_cache, p);
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(ida_get_new_above);
+
+/**
+ * ida_get_new - allocate new ID
+ * @ida: idr handle
+ * @p_id: pointer to the allocated handle
+ *
+ * Allocate new ID. It should be called with any required locks.
+ *
+ * If memory is required, it will return -EAGAIN, you should unlock
+ * and go back to the idr_pre_get() call. If the idr is full, it will
+ * return -ENOSPC.
+ *
+ * @id returns a value in the range 0 ... 0x7fffffff.
+ */
+int ida_get_new(struct ida *ida, int *p_id)
+{
+ return ida_get_new_above(ida, 0, p_id);
+}
+EXPORT_SYMBOL(ida_get_new);
+
+/**
+ * ida_remove - remove the given ID
+ * @ida: ida handle
+ * @id: ID to free
+ */
+void ida_remove(struct ida *ida, int id)
+{
+ struct idr_layer *p = ida->idr.top;
+ int shift = (ida->idr.layers - 1) * IDR_BITS;
+ int idr_id = id / IDA_BITMAP_BITS;
+ int offset = id % IDA_BITMAP_BITS;
+ int n;
+ struct ida_bitmap *bitmap;
+
+ /* clear full bits while looking up the leaf idr_layer */
+ while ((shift > 0) && p) {
+ n = (idr_id >> shift) & IDR_MASK;
+ __clear_bit(n, &p->bitmap);
+ p = p->ary[n];
+ shift -= IDR_BITS;
+ }
+
+ if (p == NULL)
+ goto err;
+
+ n = idr_id & IDR_MASK;
+ __clear_bit(n, &p->bitmap);
+
+ bitmap = (void *)p->ary[n];
+ if (!test_bit(offset, bitmap->bitmap))
+ goto err;
+
+ /* update bitmap and remove it if empty */
+ __clear_bit(offset, bitmap->bitmap);
+ if (--bitmap->nr_busy == 0) {
+ __set_bit(n, &p->bitmap); /* to please idr_remove() */
+ idr_remove(&ida->idr, idr_id);
+ free_bitmap(ida, bitmap);
+ }
+
+ return;
+
+ err:
+ printk(KERN_WARNING
+ "ida_remove called for id=%d which is not allocated.\n", id);
+}
+EXPORT_SYMBOL(ida_remove);
+
+/**
+ * ida_destroy - release all cached layers within an ida tree
+ * ida: ida handle
+ */
+void ida_destroy(struct ida *ida)
+{
+ idr_destroy(&ida->idr);
+ kfree(ida->free_bitmap);
+}
+EXPORT_SYMBOL(ida_destroy);
+
+/**
+ * ida_init - initialize ida handle
+ * @ida: ida handle
+ *
+ * This function is use to set up the handle (@ida) that you will pass
+ * to the rest of the functions.
+ */
+void ida_init(struct ida *ida)
+{
+ memset(ida, 0, sizeof(struct ida));
+ idr_init(&ida->idr);
+
+}
+EXPORT_SYMBOL(ida_init);
return error;
}
-static int create_dir(struct kobject * kobj, struct dentry *shadow_parent)
+static int create_dir(struct kobject *kobj, struct sysfs_dirent *shadow_parent)
{
int error = 0;
if (kobject_name(kobj)) {
* @shadow_parent: sysfs directory to add to.
*/
-int kobject_shadow_add(struct kobject * kobj, struct dentry *shadow_parent)
+int kobject_shadow_add(struct kobject *kobj, struct sysfs_dirent *shadow_parent)
{
int error = 0;
struct kobject * parent;
/* Note : if we want to send the new name alone, not the full path,
* we could probably use kobject_name(kobj); */
- error = sysfs_rename_dir(kobj, kobj->parent->dentry, new_name);
+ error = sysfs_rename_dir(kobj, kobj->parent->sd, new_name);
/* This function is mostly/only used for network interface.
* Some hotplug package track interfaces by their name and
* @new_name: object's new name
*/
-int kobject_shadow_rename(struct kobject * kobj, struct dentry *new_parent,
- const char *new_name)
+int kobject_shadow_rename(struct kobject *kobj,
+ struct sysfs_dirent *new_parent, const char *new_name)
{
int error = 0;
int kset_register(struct kset * k)
{
+ int err;
+
if (!k)
return -EINVAL;
+
kset_init(k);
- return kset_add(k);
+ err = kset_add(k);
+ if (err)
+ return err;
+ kobject_uevent(&k->kobj, KOBJ_ADD);
+ return 0;
}
*
* Returns the number of bytes read.
*/
-static ssize_t brforward_read(struct kobject *kobj, char *buf,
- loff_t off, size_t count)
+static ssize_t brforward_read(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct device *dev = to_dev(kobj);
struct net_bridge *br = to_bridge(dev);
static struct bin_attribute bridge_forward = {
.attr = { .name = SYSFS_BRIDGE_FDB,
- .mode = S_IRUGO,
- .owner = THIS_MODULE, },
+ .mode = S_IRUGO, },
.read = brforward_read,
};
#define BRPORT_ATTR(_name,_mode,_show,_store) \
struct brport_attribute brport_attr_##_name = { \
.attr = {.name = __stringify(_name), \
- .mode = _mode, \
- .owner = THIS_MODULE, }, \
+ .mode = _mode }, \
.show = _show, \
.store = _store, \
};
projects / firefly-linux-kernel-4.4.55.git / commitdiff