DEBUGFS_CREATE_FILE

NAME

SYNOPSIS

struct dentry * debugfs_create_file (const char * name, mode_t mode, struct dentry * parent, void * data, struct file_operations * fops);  

ARGUMENTS

name

a pointer to a string containing the name of the file to create.

mode

the 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 paramater is NULL, then the file will be created in the root of the debugfs filesystem.

data

a pointer to something that the caller will want to get to later on. The inode.u.generic_ip pointer will point to this value on the open call.

fops

a pointer to a struct file_operations that should be used for this file.

DESCRIPTION

This is the basic ``create a file'' function for debugfs. It allows for a wide range of flexibility in createing a file, or a directory (if you want to create a directory, the debugfs_create_dir function is recommended to be used instead.)

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.  

DESCRIPTION

This is the basic ``create a file'' function for debugfs. It allows for a wide range of flexibility in createing a file, or a directory (if you want to create a directory, the debugfs_create_dir function is recommended to be used instead.)

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.

Index

NAME

SYNOPSIS

ARGUMENTS

DESCRIPTION

DESCRIPTION