debugfs: unproxify files created through debugfs_create_blob()

[cascardo/linux.git] / fs / debugfs / file.c

diff --git a/fs/debugfs/file.c b/fs/debugfs/file.c
index 8a548be..2e86d66 100644 (file)
--- a/fs/debugfs/file.c
+++ b/fs/debugfs/file.c
@@ -842,8 +842,15 @@ static ssize_t read_file_blob(struct file *file, char __user *user_buf,
                              size_t count, loff_t *ppos)
 {
        struct debugfs_blob_wrapper *blob = file->private_data;
-       return simple_read_from_buffer(user_buf, count, ppos, blob->data,
-                       blob->size);
+       ssize_t r;
+       int srcu_idx;
+
+       r = debugfs_use_file_start(F_DENTRY(file), &srcu_idx);
+       if (likely(!r))
+               r = simple_read_from_buffer(user_buf, count, ppos, blob->data,
+                                       blob->size);
+       debugfs_use_file_finish(srcu_idx);
+       return r;
 }
 
 static const struct file_operations fops_blob = {
@@ -880,7 +887,7 @@ struct dentry *debugfs_create_blob(const char *name, umode_t mode,
                                   struct dentry *parent,
                                   struct debugfs_blob_wrapper *blob)
 {
-       return debugfs_create_file(name, mode, parent, blob, &fops_blob);
+       return debugfs_create_file_unsafe(name, mode, parent, blob, &fops_blob);
 }
 EXPORT_SYMBOL_GPL(debugfs_create_blob);