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 struct dentry *hypfs_create_u64(struct dentry *dir, const char *name, 26 __u64 value); 27 28 extern struct dentry *hypfs_create_str(struct dentry *dir, const char *name, 29 char *string); 30 31 /* LPAR Hypervisor */ 32 extern int hypfs_diag_init(void); 33 extern void hypfs_diag_exit(void); 34 extern int hypfs_diag_create_files(struct dentry *root); 35 36 /* VM Hypervisor */ 37 extern int hypfs_vm_init(void); 38 extern void hypfs_vm_exit(void); 39 extern int hypfs_vm_create_files(struct dentry *root); 40 41 /* VM diagnose 0c */ 42 int hypfs_diag0c_init(void); 43 void hypfs_diag0c_exit(void); 44 45 /* Set Partition-Resource Parameter */ 46 void hypfs_sprp_init(void); 47 void hypfs_sprp_exit(void); 48 49 int __hypfs_fs_init(void); 50 51 static 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 */ 59 struct hypfs_dbfs_file; 60 61 struct hypfs_dbfs_data { 62 void *buf; 63 void *buf_free_ptr; 64 size_t size; 65 struct hypfs_dbfs_file *dbfs_file; 66 }; 67 68 struct 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 81 extern void hypfs_dbfs_exit(void); 82 extern void hypfs_dbfs_create_file(struct hypfs_dbfs_file *df); 83 extern void hypfs_dbfs_remove_file(struct hypfs_dbfs_file *df); 84 85 #endif /* _HYPFS_H_ */ 86