@@ -940,6 +940,33 @@ static inline int btrfs_may_create(struct inode *dir, struct dentry *child)
return inode_permission(dir, MAY_WRITE | MAY_EXEC);
}
+static inline int btrfs_vol_uevent(struct block_device *bdev, bool vol_added,
+ const char *name)
+{
+ char *envp[3];
+ int ret = -ENOMEM;
+
+ envp[0] = kasprintf(GFP_KERNEL, "BTRFS_VOL_NAME=%s", name);
+ if (!envp[0])
+ return ret;
+
+ envp[1] = kasprintf(GFP_KERNEL, "BTRFS_VOL_%s=1",
+ vol_added ? "NEW" : "DEL");
+ if (!envp[1])
+ goto free;
+
+ envp[2] = NULL;
+
+ btrfs_kobject_uevent(bdev, KOBJ_CHANGE, envp);
+
+ ret = 0;
+
+ kfree(envp[1]);
+free:
+ kfree(envp[0]);
+ return ret;
+}
+
/*
* Create a new subvolume below @parent. This is largely modeled after
* sys_mkdirat and vfs_mkdir, but we only do a single component lookup