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 /* Namespaces */ 17 #define XATTR_OS2_PREFIX "os2." 18 #define XATTR_OS2_PREFIX_LEN (sizeof (XATTR_OS2_PREFIX) - 1) 19 20 #define XATTR_SECURITY_PREFIX "security." 21 #define XATTR_SECURITY_PREFIX_LEN (sizeof (XATTR_SECURITY_PREFIX) - 1) 22 23 #define XATTR_SYSTEM_PREFIX "system." 24 #define XATTR_SYSTEM_PREFIX_LEN (sizeof (XATTR_SYSTEM_PREFIX) - 1) 25 26 #define XATTR_TRUSTED_PREFIX "trusted." 27 #define XATTR_TRUSTED_PREFIX_LEN (sizeof (XATTR_TRUSTED_PREFIX) - 1) 28 29 #define XATTR_USER_PREFIX "user." 30 #define XATTR_USER_PREFIX_LEN (sizeof (XATTR_USER_PREFIX) - 1) 31 32 /* Security namespace */ 33 #define XATTR_EVM_SUFFIX "evm" 34 #define XATTR_NAME_EVM XATTR_SECURITY_PREFIX XATTR_EVM_SUFFIX 35 36 #define XATTR_SELINUX_SUFFIX "selinux" 37 #define XATTR_NAME_SELINUX XATTR_SECURITY_PREFIX XATTR_SELINUX_SUFFIX 38 39 #define XATTR_SMACK_SUFFIX "SMACK64" 40 #define XATTR_SMACK_IPIN "SMACK64IPIN" 41 #define XATTR_SMACK_IPOUT "SMACK64IPOUT" 42 #define XATTR_SMACK_EXEC "SMACK64EXEC" 43 #define XATTR_SMACK_TRANSMUTE "SMACK64TRANSMUTE" 44 #define XATTR_SMACK_MMAP "SMACK64MMAP" 45 #define XATTR_NAME_SMACK XATTR_SECURITY_PREFIX XATTR_SMACK_SUFFIX 46 #define XATTR_NAME_SMACKIPIN XATTR_SECURITY_PREFIX XATTR_SMACK_IPIN 47 #define XATTR_NAME_SMACKIPOUT XATTR_SECURITY_PREFIX XATTR_SMACK_IPOUT 48 #define XATTR_NAME_SMACKEXEC XATTR_SECURITY_PREFIX XATTR_SMACK_EXEC 49 #define XATTR_NAME_SMACKTRANSMUTE XATTR_SECURITY_PREFIX XATTR_SMACK_TRANSMUTE 50 #define XATTR_NAME_SMACKMMAP XATTR_SECURITY_PREFIX XATTR_SMACK_MMAP 51 52 #define XATTR_CAPS_SUFFIX "capability" 53 #define XATTR_NAME_CAPS XATTR_SECURITY_PREFIX XATTR_CAPS_SUFFIX 54 55 #define XATTR_POSIX_ACL_ACCESS "posix_acl_access" 56 #define XATTR_NAME_POSIX_ACL_ACCESS XATTR_SYSTEM_PREFIX XATTR_POSIX_ACL_ACCESS 57 #define XATTR_POSIX_ACL_DEFAULT "posix_acl_default" 58 #define XATTR_NAME_POSIX_ACL_DEFAULT XATTR_SYSTEM_PREFIX XATTR_POSIX_ACL_DEFAULT 59 60 #ifdef __KERNEL__ 61 62 #include <linux/types.h> 63 64 struct inode; 65 struct dentry; 66 67 struct xattr_handler { 68 const char *prefix; 69 int flags; /* fs private flags passed back to the handlers */ 70 size_t (*list)(struct dentry *dentry, char *list, size_t list_size, 71 const char *name, size_t name_len, int handler_flags); 72 int (*get)(struct dentry *dentry, const char *name, void *buffer, 73 size_t size, int handler_flags); 74 int (*set)(struct dentry *dentry, const char *name, const void *buffer, 75 size_t size, int flags, int handler_flags); 76 }; 77 78 struct xattr { 79 char *name; 80 void *value; 81 size_t value_len; 82 }; 83 84 ssize_t xattr_getsecurity(struct inode *, const char *, void *, size_t); 85 ssize_t vfs_getxattr(struct dentry *, const char *, void *, size_t); 86 ssize_t vfs_listxattr(struct dentry *d, char *list, size_t size); 87 int __vfs_setxattr_noperm(struct dentry *, const char *, const void *, size_t, int); 88 int vfs_setxattr(struct dentry *, const char *, const void *, size_t, int); 89 int vfs_removexattr(struct dentry *, const char *); 90 91 ssize_t generic_getxattr(struct dentry *dentry, const char *name, void *buffer, size_t size); 92 ssize_t generic_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size); 93 int generic_setxattr(struct dentry *dentry, const char *name, const void *value, size_t size, int flags); 94 int generic_removexattr(struct dentry *dentry, const char *name); 95 ssize_t vfs_getxattr_alloc(struct dentry *dentry, const char *name, 96 char **xattr_value, size_t size, gfp_t flags); 97 int vfs_xattr_cmp(struct dentry *dentry, const char *xattr_name, 98 const char *value, size_t size, gfp_t flags); 99 #endif /* __KERNEL__ */ 100 101 #endif /* _LINUX_XATTR_H */ 102