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debugfs_create_file(9) [centos man page]

DEBUGFS_CREATE_FILE(9)					      The debugfs filesystem					    DEBUGFS_CREATE_FILE(9)

NAME
debugfs_create_file - create a file in the debugfs filesystem SYNOPSIS
struct dentry * debugfs_create_file(const char * name, umode_t mode, struct dentry * parent, void * data, const 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.i_private 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 creating 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. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 DEBUGFS_CREATE_FILE(9)

Check Out this Related Man Page

DEBUGFS_CREATE_BOOL(9)					      The debugfs filesystem					    DEBUGFS_CREATE_BOOL(9)

NAME
debugfs_create_bool - create a debugfs file that is used to read and write a boolean value SYNOPSIS
struct dentry * debugfs_create_bool(const char * name, umode_t mode, struct dentry * parent, u32 * value); 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 parameter is NULL, then the file will be created in the root of the debugfs filesystem. value a pointer to the variable that the file should read to and write from. DESCRIPTION
This function creates a file in debugfs with the given name that contains the value of the variable value. If the mode variable is so set, it can be read from, and written to. 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
Kernel Hackers Manual 3.10 June 2014 DEBUGFS_CREATE_BOOL(9)

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