diff options
Diffstat (limited to 'drivers/base/devtmpfs.c')
| -rw-r--r-- | drivers/base/devtmpfs.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/base/devtmpfs.c b/drivers/base/devtmpfs.c index 42ae452b36b0..af0600143d1c 100644 --- a/drivers/base/devtmpfs.c +++ b/drivers/base/devtmpfs.c @@ -20,9 +20,11 @@ #include <linux/namei.h> #include <linux/fs.h> #include <linux/shmem_fs.h> +#include <linux/ramfs.h> #include <linux/cred.h> #include <linux/sched.h> #include <linux/init_task.h> +#include <linux/slab.h> static struct vfsmount *dev_mnt; @@ -44,7 +46,11 @@ __setup("devtmpfs.mount=", mount_param); static int dev_get_sb(struct file_system_type *fs_type, int flags, const char *dev_name, void *data, struct vfsmount *mnt) { +#ifdef CONFIG_TMPFS return get_sb_single(fs_type, flags, data, shmem_fill_super, mnt); +#else + return get_sb_single(fs_type, flags, data, ramfs_fill_super, mnt); +#endif } static struct file_system_type dev_fs_type = { @@ -301,6 +307,19 @@ int devtmpfs_delete_node(struct device *dev) if (dentry->d_inode) { err = vfs_getattr(nd.path.mnt, dentry, &stat); if (!err && dev_mynode(dev, dentry->d_inode, &stat)) { + struct iattr newattrs; + /* + * before unlinking this node, reset permissions + * of possible references like hardlinks + */ + newattrs.ia_uid = 0; + newattrs.ia_gid = 0; + newattrs.ia_mode = stat.mode & ~0777; + newattrs.ia_valid = + ATTR_UID|ATTR_GID|ATTR_MODE; + mutex_lock(&dentry->d_inode->i_mutex); + notify_change(dentry, &newattrs); + mutex_unlock(&dentry->d_inode->i_mutex); err = vfs_unlink(nd.path.dentry->d_inode, dentry); if (!err || err == -ENOENT) |