table of contents
- stretch 4.9.168-1
DEBUGFS_CREATE_BLOB(9) | The debugfs filesystem | DEBUGFS_CREATE_BLOB(9) |
NAME¶
debugfs_create_blob - create a debugfs file that is used to read a binary blobSYNOPSIS¶
struct dentry * debugfs_create_blob(const char * name, umode_t mode, struct dentry * parent, struct debugfs_blob_wrapper * blob);
ARGUMENTS¶
namemode
parent
blob
DESCRIPTION¶
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.
COPYRIGHT¶
April 2019 | Kernel Hackers Manual 4.9. |