arch/s390/hypfs/hypfs.h

   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_create_file(struct hypfs_dbfs_file *df);
  82 extern void hypfs_dbfs_remove_file(struct hypfs_dbfs_file *df);
  83
  84 #endif /* _HYPFS_H_ */