Re: [PATCH] debufgs: debugfs_create_blob can set the file size

[Timur Tabi <ttabi@nvidia.com>]

On Thu, 2024-02-08 at 08:40 +1100, Dave Chinner wrote:
> i_size_write()?

Thanks, I will post a v2.

> 
> And why doesn't debugfs_create_file_unsafe() do this already when it
> attaches the blob to the inode? 

Because it doesn't know the size any more.

The 'blob' in debugfs_create_blob() is this:

struct debugfs_blob_wrapper {
	void *data;
	unsigned long size;
};

When it passes the blob to debugfs_create_file_unsafe(), that's passed as
"void *data", and so debugfs_create_file_unsafe() doesn't know that it's a
'blob' any more.