debugfs_create_blob — create a debugfs file that is used to read and write a binary blob
struct dentry * debugfs_create_blob ( | const char * | name, |
| mode_t | mode, | |
| struct dentry * | parent, | |
| struct debugfs_blob_wrapper * | blob); |
namea pointer to a string containing the name of the file to create.
modethe permission that the file should have
parent
a pointer to the parent dentry for this file. This should be a
directory dentry if set. If this parameter is NULL, then the
file will be created in the root of the debugfs filesystem.
bloba pointer to a struct debugfs_blob_wrapper which contains a pointer to the blob data and the size of the data.
This function creates a file in debugfs with the given name that exports
blob->data as a binary blob. If the mode variable is so set it can be
read from. Writing is not supported.
This function will return a pointer to a dentry if it succeeds. This
pointer must be passed to the debugfs_remove function when the file is
to be removed (no automatic cleanup happens if your module is unloaded,
you are responsible here.) If an error occurs, NULL will be returned.
If debugfs is not enabled in the kernel, the value -ENODEV will be
returned. It is not wise to check for this value, but rather, check for
NULL or !NULL instead as to eliminate the need for #ifdef in the calling
code.