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 23 extern struct dentry *hypfs_mkdir(struct dentry *parent, const char *name); 24 25 extern int hypfs_create_u64(struct dentry *dir, const char *name, __u64 value); 26 27 extern int hypfs_create_str(struct dentry *dir, const char *name, char *string); 28 29 /* LPAR Hypervisor */ 30 extern int hypfs_diag_init(void); 31 extern void hypfs_diag_exit(void); 32 extern int hypfs_diag_create_files(struct dentry *root); 33 34 /* VM Hypervisor */ 35 extern int hypfs_vm_init(void); 36 extern void hypfs_vm_exit(void); 37 extern int hypfs_vm_create_files(struct dentry *root); 38 39 /* VM diagnose 0c */ 40 int hypfs_diag0c_init(void); 41 void hypfs_diag0c_exit(void); 42 43 /* Set Partition-Resource Parameter */ 44 void hypfs_sprp_init(void); 45 void hypfs_sprp_exit(void); 46 47 int __hypfs_fs_init(void); 48 hypfs_fs_init(void)49static __always_inline int hypfs_fs_init(void) 50 { 51 if (IS_ENABLED(CONFIG_S390_HYPFS_FS)) 52 return __hypfs_fs_init(); 53 return 0; 54 } 55 56 /* debugfs interface */ 57 struct hypfs_dbfs_file; 58 59 struct hypfs_dbfs_data { 60 void *buf; 61 void *buf_free_ptr; 62 size_t size; 63 struct hypfs_dbfs_file *dbfs_file; 64 }; 65 66 struct hypfs_dbfs_file { 67 const char *name; 68 int (*data_create)(void **data, void **data_free_ptr, 69 size_t *size); 70 void (*data_free)(const void *buf_free_ptr); 71 long (*unlocked_ioctl) (struct file *, unsigned int, 72 unsigned long); 73 74 /* Private data for hypfs_dbfs.c */ 75 struct mutex lock; 76 struct dentry *dentry; 77 }; 78 79 extern void hypfs_dbfs_create_file(struct hypfs_dbfs_file *df); 80 extern void hypfs_dbfs_remove_file(struct hypfs_dbfs_file *df); 81 82 #endif /* _HYPFS_H_ */ 83