[PATCH] debugfs: Add debugfs_create_blob() helper for exporting binary data

I wanted to export a binary blob via debugfs, and although it was pretty easy
it seems like it'd be easier if there was a helper for it. It's a pity we need
the wrapper struct but I can't see a cleaner way to do it.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 15 insertions, 0 deletions

diff --git a/include/linux/debugfs.h b/include/linux/debugfs.h
index a5fa6a6eede..4b0428e335b 100644
--- a/include/linux/debugfs.h
+++ b/include/linux/debugfs.h
@@ -21,6 +21,11 @@
 
 struct file_operations;
 
+struct debugfs_blob_wrapper {
+        void *data;
+        unsigned long size;
+};
+
 #if defined(CONFIG_DEBUG_FS)
 struct dentry *debugfs_create_file(const char *name, mode_t mode,
                                    struct dentry *parent, void *data,
@@ -39,6 +44,9 @@ struct dentry *debugfs_create_u32(const char *name, mode_t mode,
 struct dentry *debugfs_create_bool(const char *name, mode_t mode,
                                   struct dentry *parent, u32 *value);
 
+struct dentry *debugfs_create_blob(const char *name, mode_t mode,
+                                  struct dentry *parent,
+                                  struct debugfs_blob_wrapper *blob);
 #else
 
 #include <linux/err.h>
@@ -94,6 +102,13 @@ static inline struct dentry *debugfs_create_bool(const char *name, mode_t mode,
         return ERR_PTR(-ENODEV);
 }
 
+static inline struct dentry *debugfs_create_blob(const char *name, mode_t mode,
+                                  struct dentry *parent,
+                                  struct debugfs_blob_wrapper *blob)
+{
+        return ERR_PTR(-ENODEV);
+}
+
 #endif
 
 #endif