xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Driver-Core: extend devnode callbacks to provide permissions

Browse Source 
This allows subsytems to provide devtmpfs with non-default permissions
for the device node. Instead of the default mode of 0600, null, zero,
random, urandom, full, tty, ptmx now have a mode of 0666, which allows
non-privileged processes to access standard device nodes in case no
other userspace process applies the expected permissions.

This also fixes a wrong assignment in pktcdvd and a checkpatch.pl complain.

Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Kay Sievers
2009-09-18 23:01:12 +02:00
committed by Live-CD User
parent 78f28b7c55
commit e454cea20b
30 changed files with 116 additions and 79 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
include/linux/device.h
View File

@@ -193,7 +193,7 @@ struct class {
struct kobject *dev_kobj;
int (*dev_uevent)(struct device *dev, struct kobj_uevent_env *env);
char *(*nodename)(struct device *dev);
char *(*devnode)(struct device *dev, mode_t *mode);
void (*class_release)(struct class *class);
void (*dev_release)(struct device *dev);
@@ -298,7 +298,7 @@ struct device_type {
const char *name;
const struct attribute_group **groups;
int (*uevent)(struct device *dev, struct kobj_uevent_env *env);
char *(*nodename)(struct device *dev);
char *(*devnode)(struct device *dev, mode_t *mode);
void (*release)(struct device *dev);
const struct dev_pm_ops *pm;
@@ -487,7 +487,8 @@ extern struct device *device_find_child(struct device *dev, void *data,
extern int device_rename(struct device *dev, char *new_name);
extern int device_move(struct device *dev, struct device *new_parent,
enum dpm_order dpm_order);
extern const char *device_get_nodename(struct device *dev, const char **tmp);
extern const char *device_get_devnode(struct device *dev,
mode_t *mode, const char **tmp);
extern void *dev_get_drvdata(const struct device *dev);
extern void dev_set_drvdata(struct device *dev, void *data);

2
include/linux/genhd.h
View File

@@ -142,7 +142,7 @@ struct gendisk {
* disks that can't be partitioned. */
char disk_name[DISK_NAME_LEN]; /* name of major driver */
char *(*nodename)(struct gendisk *gd);
char *(*devnode)(struct gendisk *gd, mode_t *mode);
/* Array of pointers to partitions indexed by partno.
* Protected with matching bdev lock but stat and other
* non-critical accesses use RCU. Always access through

3
include/linux/miscdevice.h
View File

@@ -41,7 +41,8 @@ struct miscdevice {
struct list_head list;
struct device *parent;
struct device *this_device;
const char *devnode;
const char *nodename;
mode_t mode;
};
extern int misc_register(struct miscdevice * misc);

4
include/linux/usb.h
View File

@@ -922,7 +922,7 @@ extern struct bus_type usb_bus_type;
/**
* struct usb_class_driver - identifies a USB driver that wants to use the USB major number
* @name: the usb class device name for this driver. Will show up in sysfs.
* @nodename: Callback to provide a naming hint for a possible
* @devnode: Callback to provide a naming hint for a possible
* device node to create.
* @fops: pointer to the struct file_operations of this driver.
* @minor_base: the start of the minor range for this driver.
@@ -933,7 +933,7 @@ extern struct bus_type usb_bus_type;
*/
struct usb_class_driver {
char *name;
char *(*nodename)(struct device *dev);
char *(*devnode)(struct device *dev, mode_t *mode);
const struct file_operations *fops;
int minor_base;
};