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-rw-r--r--block/genhd.c3
-rw-r--r--drivers/base/core.c17
-rw-r--r--drivers/base/devtmpfs.c27
-rw-r--r--drivers/usb/core/usb.c3
-rw-r--r--include/linux/device.h7
5 files changed, 39 insertions, 18 deletions
diff --git a/block/genhd.c b/block/genhd.c
index 3c001fba80c..dfcec431cee 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -1111,7 +1111,8 @@ struct class block_class = {
.name = "block",
};
-static char *block_devnode(struct device *dev, umode_t *mode)
+static char *block_devnode(struct device *dev, umode_t *mode,
+ uid_t *uid, gid_t *gid)
{
struct gendisk *disk = dev_to_disk(dev);
diff --git a/drivers/base/core.c b/drivers/base/core.c
index a7391a30cb2..8a428b51089 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -283,15 +283,21 @@ static int dev_uevent(struct kset *kset, struct kobject *kobj,
const char *tmp;
const char *name;
umode_t mode = 0;
+ uid_t uid = 0;
+ gid_t gid = 0;
add_uevent_var(env, "MAJOR=%u", MAJOR(dev->devt));
add_uevent_var(env, "MINOR=%u", MINOR(dev->devt));
- name = device_get_devnode(dev, &mode, &tmp);
+ name = device_get_devnode(dev, &mode, &uid, &gid, &tmp);
if (name) {
add_uevent_var(env, "DEVNAME=%s", name);
- kfree(tmp);
if (mode)
add_uevent_var(env, "DEVMODE=%#o", mode & 0777);
+ if (uid)
+ add_uevent_var(env, "DEVUID=%u", uid);
+ if (gid)
+ add_uevent_var(env, "DEVGID=%u", gid);
+ kfree(tmp);
}
}
@@ -1281,6 +1287,8 @@ static struct device *next_device(struct klist_iter *i)
* device_get_devnode - path of device node file
* @dev: device
* @mode: returned file access mode
+ * @uid: returned file owner
+ * @gid: returned file group
* @tmp: possibly allocated string
*
* Return the relative path of a possible device node.
@@ -1289,7 +1297,8 @@ static struct device *next_device(struct klist_iter *i)
* freed by the caller.
*/
const char *device_get_devnode(struct device *dev,
- umode_t *mode, const char **tmp)
+ umode_t *mode, uid_t *uid, gid_t *gid,
+ const char **tmp)
{
char *s;
@@ -1297,7 +1306,7 @@ const char *device_get_devnode(struct device *dev,
/* the device type may provide a specific name */
if (dev->type && dev->type->devnode)
- *tmp = dev->type->devnode(dev, mode);
+ *tmp = dev->type->devnode(dev, mode, uid, gid);
if (*tmp)
return *tmp;
diff --git a/drivers/base/devtmpfs.c b/drivers/base/devtmpfs.c
index 01fc5b07f95..fda52563677 100644
--- a/drivers/base/devtmpfs.c
+++ b/drivers/base/devtmpfs.c
@@ -41,6 +41,8 @@ static struct req {
int err;
const char *name;
umode_t mode; /* 0 => delete */
+ uid_t uid;
+ gid_t gid;
struct device *dev;
} *requests;
@@ -85,7 +87,9 @@ int devtmpfs_create_node(struct device *dev)
return 0;
req.mode = 0;
- req.name = device_get_devnode(dev, &req.mode, &tmp);
+ req.uid = 0;
+ req.gid = 0;
+ req.name = device_get_devnode(dev, &req.mode, &req.uid, &req.gid, &tmp);
if (!req.name)
return -ENOMEM;
@@ -121,7 +125,7 @@ int devtmpfs_delete_node(struct device *dev)
if (!thread)
return 0;
- req.name = device_get_devnode(dev, NULL, &tmp);
+ req.name = device_get_devnode(dev, NULL, NULL, NULL, &tmp);
if (!req.name)
return -ENOMEM;
@@ -187,7 +191,8 @@ static int create_path(const char *nodepath)
return err;
}
-static int handle_create(const char *nodename, umode_t mode, struct device *dev)
+static int handle_create(const char *nodename, umode_t mode, uid_t uid,
+ gid_t gid, struct device *dev)
{
struct dentry *dentry;
struct path path;
@@ -201,14 +206,14 @@ static int handle_create(const char *nodename, umode_t mode, struct device *dev)
if (IS_ERR(dentry))
return PTR_ERR(dentry);
- err = vfs_mknod(path.dentry->d_inode,
- dentry, mode, dev->devt);
+ err = vfs_mknod(path.dentry->d_inode, dentry, mode, dev->devt);
if (!err) {
struct iattr newattrs;
- /* fixup possibly umasked mode */
newattrs.ia_mode = mode;
- newattrs.ia_valid = ATTR_MODE;
+ newattrs.ia_uid = uid;
+ newattrs.ia_gid = gid;
+ newattrs.ia_valid = ATTR_MODE|ATTR_UID|ATTR_GID;
mutex_lock(&dentry->d_inode->i_mutex);
notify_change(dentry, &newattrs);
mutex_unlock(&dentry->d_inode->i_mutex);
@@ -358,10 +363,11 @@ int devtmpfs_mount(const char *mntdir)
static DECLARE_COMPLETION(setup_done);
-static int handle(const char *name, umode_t mode, struct device *dev)
+static int handle(const char *name, umode_t mode, uid_t uid, gid_t gid,
+ struct device *dev)
{
if (mode)
- return handle_create(name, mode, dev);
+ return handle_create(name, mode, uid, gid, dev);
else
return handle_remove(name, dev);
}
@@ -387,7 +393,8 @@ static int devtmpfsd(void *p)
spin_unlock(&req_lock);
while (req) {
struct req *next = req->next;
- req->err = handle(req->name, req->mode, req->dev);
+ req->err = handle(req->name, req->mode,
+ req->uid, req->gid, req->dev);
complete(&req->done);
req = next;
}
diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index f81b9257273..17002832abd 100644
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -317,7 +317,8 @@ static const struct dev_pm_ops usb_device_pm_ops = {
#endif /* CONFIG_PM */
-static char *usb_devnode(struct device *dev, umode_t *mode)
+static char *usb_devnode(struct device *dev,
+ umode_t *mode, uid_t *uid, gid_t *gid)
{
struct usb_device *usb_dev;
diff --git a/include/linux/device.h b/include/linux/device.h
index 4a7c4a84afe..851b85c7101 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -25,6 +25,7 @@
#include <linux/pm.h>
#include <linux/atomic.h>
#include <linux/ratelimit.h>
+#include <linux/uidgid.h>
#include <asm/device.h>
struct device;
@@ -465,7 +466,8 @@ struct device_type {
const char *name;
const struct attribute_group **groups;
int (*uevent)(struct device *dev, struct kobj_uevent_env *env);
- char *(*devnode)(struct device *dev, umode_t *mode);
+ char *(*devnode)(struct device *dev, umode_t *mode,
+ uid_t *uid, gid_t *gid);
void (*release)(struct device *dev);
const struct dev_pm_ops *pm;
@@ -843,7 +845,8 @@ extern int device_rename(struct device *dev, const char *new_name);
extern int device_move(struct device *dev, struct device *new_parent,
enum dpm_order dpm_order);
extern const char *device_get_devnode(struct device *dev,
- umode_t *mode, const char **tmp);
+ umode_t *mode, uid_t *uid, gid_t *gid,
+ const char **tmp);
extern void *dev_get_drvdata(const struct device *dev);
extern int dev_set_drvdata(struct device *dev, void *data);
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-24 13:45:06 +0000