1 /* 2 File: linux/xattr.h 3 4 Extended attributes handling. 5 6 Copyright (C) 2001 by Andreas Gruenbacher <a.gruenbacher@computer.org> 7 Copyright (c) 2001-2002 Silicon Graphics, Inc. All Rights Reserved. 8 Copyright (c) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com> 9 */ 10 #ifndef _LINUX_XATTR_H 11 #define _LINUX_XATTR_H 12 13 #define XATTR_CREATE 0x1 /* set value, fail if attr already exists */ 14 #define XATTR_REPLACE 0x2 /* set value, fail if attr does not exist */ 15 16 #ifdef __KERNEL__ 17 18 #include <linux/types.h> 19 20 /* Namespaces */ 21 #define XATTR_OS2_PREFIX "os2." 22 #define XATTR_OS2_PREFIX_LEN (sizeof (XATTR_OS2_PREFIX) - 1) 23 24 #define XATTR_SECURITY_PREFIX "security." 25 #define XATTR_SECURITY_PREFIX_LEN (sizeof (XATTR_SECURITY_PREFIX) - 1) 26 27 #define XATTR_SYSTEM_PREFIX "system." 28 #define XATTR_SYSTEM_PREFIX_LEN (sizeof (XATTR_SYSTEM_PREFIX) - 1) 29 30 #define XATTR_TRUSTED_PREFIX "trusted." 31 #define XATTR_TRUSTED_PREFIX_LEN (sizeof (XATTR_TRUSTED_PREFIX) - 1) 32 33 #define XATTR_USER_PREFIX "user." 34 #define XATTR_USER_PREFIX_LEN (sizeof (XATTR_USER_PREFIX) - 1) 35 36 struct inode; 37 struct dentry; 38 39 struct xattr_handler { 40 char *prefix; 41 size_t (*list)(struct inode *inode, char *list, size_t list_size, 42 const char *name, size_t name_len); 43 int (*get)(struct inode *inode, const char *name, void *buffer, 44 size_t size); 45 int (*set)(struct inode *inode, const char *name, const void *buffer, 46 size_t size, int flags); 47 }; 48 49 ssize_t xattr_getsecurity(struct inode *, const char *, void *, size_t); 50 ssize_t vfs_getxattr(struct dentry *, const char *, void *, size_t); 51 ssize_t vfs_listxattr(struct dentry *d, char *list, size_t size); 52 int vfs_setxattr(struct dentry *, const char *, const void *, size_t, int); 53 int vfs_removexattr(struct dentry *, const char *); 54 55 ssize_t generic_getxattr(struct dentry *dentry, const char *name, void *buffer, size_t size); 56 ssize_t generic_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size); 57 int generic_setxattr(struct dentry *dentry, const char *name, const void *value, size_t size, int flags); 58 int generic_removexattr(struct dentry *dentry, const char *name); 59 60 #endif /* __KERNEL__ */ 61 62 #endif /* _LINUX_XATTR_H */ 63