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 /* Security namespace */ 37 #define XATTR_SELINUX_SUFFIX "selinux" 38 #define XATTR_NAME_SELINUX XATTR_SECURITY_PREFIX XATTR_SELINUX_SUFFIX 39 40 #define XATTR_SMACK_SUFFIX "SMACK64" 41 #define XATTR_SMACK_IPIN "SMACK64IPIN" 42 #define XATTR_SMACK_IPOUT "SMACK64IPOUT" 43 #define XATTR_SMACK_EXEC "SMACK64EXEC" 44 #define XATTR_SMACK_TRANSMUTE "SMACK64TRANSMUTE" 45 #define XATTR_SMACK_MMAP "SMACK64MMAP" 46 #define XATTR_NAME_SMACK XATTR_SECURITY_PREFIX XATTR_SMACK_SUFFIX 47 #define XATTR_NAME_SMACKIPIN XATTR_SECURITY_PREFIX XATTR_SMACK_IPIN 48 #define XATTR_NAME_SMACKIPOUT XATTR_SECURITY_PREFIX XATTR_SMACK_IPOUT 49 #define XATTR_NAME_SMACKEXEC XATTR_SECURITY_PREFIX XATTR_SMACK_EXEC 50 #define XATTR_NAME_SMACKTRANSMUTE XATTR_SECURITY_PREFIX XATTR_SMACK_TRANSMUTE 51 #define XATTR_NAME_SMACKMMAP XATTR_SECURITY_PREFIX XATTR_SMACK_MMAP 52 53 #define XATTR_CAPS_SUFFIX "capability" 54 #define XATTR_NAME_CAPS XATTR_SECURITY_PREFIX XATTR_CAPS_SUFFIX 55 56 struct inode; 57 struct dentry; 58 59 struct xattr_handler { 60 const char *prefix; 61 int flags; /* fs private flags passed back to the handlers */ 62 size_t (*list)(struct dentry *dentry, char *list, size_t list_size, 63 const char *name, size_t name_len, int handler_flags); 64 int (*get)(struct dentry *dentry, const char *name, void *buffer, 65 size_t size, int handler_flags); 66 int (*set)(struct dentry *dentry, const char *name, const void *buffer, 67 size_t size, int flags, int handler_flags); 68 }; 69 70 ssize_t xattr_getsecurity(struct inode *, const char *, void *, size_t); 71 ssize_t vfs_getxattr(struct dentry *, const char *, void *, size_t); 72 ssize_t vfs_listxattr(struct dentry *d, char *list, size_t size); 73 int __vfs_setxattr_noperm(struct dentry *, const char *, const void *, size_t, int); 74 int vfs_setxattr(struct dentry *, const char *, const void *, size_t, int); 75 int vfs_removexattr(struct dentry *, const char *); 76 77 ssize_t generic_getxattr(struct dentry *dentry, const char *name, void *buffer, size_t size); 78 ssize_t generic_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size); 79 int generic_setxattr(struct dentry *dentry, const char *name, const void *value, size_t size, int flags); 80 int generic_removexattr(struct dentry *dentry, const char *name); 81 82 #endif /* __KERNEL__ */ 83 84 #endif /* _LINUX_XATTR_H */ 85