Update bcachefs sources to 938f680845d1 fixup! rename and export __kern_path_locked()

[bcachefs-tools-debian] / libbcachefs / fs-ioctl.c

diff --git a/libbcachefs/fs-ioctl.c b/libbcachefs/fs-ioctl.c
index 5a39bcb597a33d42826a16a98da394de3fe23660..d7c1b05aa438568c4b7becceb00e20853ad87d3f 100644 (file)
--- a/libbcachefs/fs-ioctl.c
+++ b/libbcachefs/fs-ioctl.c
@@ -453,33 +453,35 @@ static long bch2_ioctl_subvolume_create(struct bch_fs *c, struct file *filp,
 static long bch2_ioctl_subvolume_destroy(struct bch_fs *c, struct file *filp,
                                struct bch_ioctl_subvolume arg)
 {
+       struct filename *name;
        struct path path;
        struct inode *dir;
+       struct dentry *victim;
        int ret = 0;
 
        if (arg.flags)
                return -EINVAL;
 
-       ret = user_path_at(arg.dirfd,
-                       (const char __user *)(unsigned long)arg.dst_ptr,
-                       LOOKUP_FOLLOW, &path);
-       if (ret)
-               return ret;
+       name = getname((const char __user *)(unsigned long)arg.dst_ptr);
+       victim = filename_path_locked(arg.dirfd, name, &path);
+       putname(name);
+       if (IS_ERR(victim))
+               return PTR_ERR(victim);
 
-       if (path.dentry->d_sb->s_fs_info != c) {
+       if (victim->d_sb->s_fs_info != c) {
                ret = -EXDEV;
                goto err;
        }
 
-       dir = path.dentry->d_parent->d_inode;
-
-       ret = __bch2_unlink(dir, path.dentry, true);
-       if (ret)
-               goto err;
-
-       fsnotify_rmdir(dir, path.dentry);
-       d_delete(path.dentry);
+       dir = d_inode(path.dentry);
+       ret = __bch2_unlink(dir, victim, true);
+       if (!ret) {
+               fsnotify_rmdir(dir, victim);
+               d_delete(victim);
+       }
+       inode_unlock(dir);
 err:
+       dput(victim);
        path_put(&path);
        return ret;
 }