1/* SPDX-License-Identifier: GPL-2.0 */ 2/* 3 * Hypervisor filesystem for Linux on s390. 4 * 5 * Copyright IBM Corp. 2006 6 * Author(s): Michael Holzheu <holzheu@de.ibm.com> 7 */ 8 9#ifndef _HYPFS_H_ 10#define _HYPFS_H_ 11 12#include <linux/fs.h> 13#include <linux/types.h> 14#include <linux/debugfs.h> 15#include <linux/workqueue.h> 16#include <linux/kref.h> 17#include <asm/hypfs.h> 18 19#define REG_FILE_MODE 0440 20#define UPDATE_FILE_MODE 0220 21#define DIR_MODE 0550 22 23extern struct dentry *hypfs_mkdir(struct dentry *parent, const char *name); 24 25extern struct dentry *hypfs_create_u64(struct dentry *dir, const char *name, 26 __u64 value); 27 28extern struct dentry *hypfs_create_str(struct dentry *dir, const char *name, 29 char *string); 30 31/* LPAR Hypervisor */ 32extern int hypfs_diag_init(void); 33extern void hypfs_diag_exit(void); 34extern int hypfs_diag_create_files(struct dentry *root); 35 36/* VM Hypervisor */ 37extern int hypfs_vm_init(void); 38extern void hypfs_vm_exit(void); 39extern int hypfs_vm_create_files(struct dentry *root); 40 41/* VM diagnose 0c */ 42int hypfs_diag0c_init(void); 43void hypfs_diag0c_exit(void); 44 45/* Set Partition-Resource Parameter */ 46void hypfs_sprp_init(void); 47void hypfs_sprp_exit(void); 48 49int __hypfs_fs_init(void); 50 51static inline int hypfs_fs_init(void) 52{ 53 if (IS_ENABLED(CONFIG_S390_HYPFS_FS)) 54 return __hypfs_fs_init(); 55 return 0; 56} 57 58/* debugfs interface */ 59struct hypfs_dbfs_file; 60 61struct hypfs_dbfs_data { 62 void *buf; 63 void *buf_free_ptr; 64 size_t size; 65 struct hypfs_dbfs_file *dbfs_file; 66}; 67 68struct hypfs_dbfs_file { 69 const char *name; 70 int (*data_create)(void **data, void **data_free_ptr, 71 size_t *size); 72 void (*data_free)(const void *buf_free_ptr); 73 long (*unlocked_ioctl) (struct file *, unsigned int, 74 unsigned long); 75 76 /* Private data for hypfs_dbfs.c */ 77 struct mutex lock; 78 struct dentry *dentry; 79}; 80 81extern void hypfs_dbfs_exit(void); 82extern void hypfs_dbfs_create_file(struct hypfs_dbfs_file *df); 83extern void hypfs_dbfs_remove_file(struct hypfs_dbfs_file *df); 84 85#endif /* _HYPFS_H_ */ 86