fs/devpts/xattr.h

   1 /*
   2   File: fs/devpts/xattr.h
   3
   4   Derived from fs/ext3/xattr.h, changed in the following ways:
   5       drop everything related to persistent storage of EAs
   6       pass dentry rather than inode to internal methods
   7       only presently define a handler for security modules
   8 */
   9
  10 #include <linux/config.h>
  11 #include <linux/xattr.h>
  12
  13 /* Name indexes */
  14 #define DEVPTS_XATTR_INDEX_MAX                  10
  15 #define DEVPTS_XATTR_INDEX_SECURITY             1
  16
  17 # ifdef CONFIG_DEVPTS_FS_XATTR
  18
  19 struct devpts_xattr_handler {
  20         char *prefix;
  21         size_t (*list)(struct dentry *dentry, char *buffer);
  22         int (*get)(struct dentry *dentry, const char *name, void *buffer,
  23                    size_t size);
  24         int (*set)(struct dentry *dentry, const char *name, const void *buffer,
  25                    size_t size, int flags);
  26 };
  27
  28 extern int devpts_xattr_register(int, struct devpts_xattr_handler *);
  29 extern void devpts_xattr_unregister(int, struct devpts_xattr_handler *);
  30
  31 extern int devpts_setxattr(struct dentry *, const char *, const void *, size_t, int);
  32 extern ssize_t devpts_getxattr(struct dentry *, const char *, void *, size_t);
  33 extern ssize_t devpts_listxattr(struct dentry *, char *, size_t);
  34 extern int devpts_removexattr(struct dentry *, const char *);
  35
  36 extern int init_devpts_xattr(void);
  37 extern void exit_devpts_xattr(void);
  38
  39 # else  /* CONFIG_DEVPTS_FS_XATTR */
  40 #  define devpts_setxattr               NULL
  41 #  define devpts_getxattr               NULL
  42 #  define devpts_listxattr      NULL
  43 #  define devpts_removexattr    NULL
  44
  45 static inline int
  46 init_devpts_xattr(void)
  47 {
  48         return 0;
  49 }
  50
  51 static inline void
  52 exit_devpts_xattr(void)
  53 {
  54 }
  55
  56 # endif  /* CONFIG_DEVPTS_FS_XATTR */
  57
  58 extern struct devpts_xattr_handler devpts_xattr_security_handler;
  59