4 Extended attributes handling.
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>
10 #ifndef _LINUX_XATTR_H
11 #define _LINUX_XATTR_H
14 #include <linux/slab.h>
15 #include <linux/types.h>
16 #include <linux/spinlock.h>
17 #include <uapi/linux/xattr.h>
22 struct xattr_handler {
24 int flags; /* fs private flags */
25 size_t (*list)(const struct xattr_handler *, struct dentry *dentry,
26 char *list, size_t list_size, const char *name,
28 int (*get)(const struct xattr_handler *, struct dentry *dentry,
29 const char *name, void *buffer, size_t size);
30 int (*set)(const struct xattr_handler *, struct dentry *dentry,
31 const char *name, const void *buffer, size_t size,
35 const char *xattr_full_name(const struct xattr_handler *, const char *);
43 ssize_t xattr_getsecurity(struct inode *, const char *, void *, size_t);
44 ssize_t vfs_getxattr(struct dentry *, const char *, void *, size_t);
45 ssize_t vfs_listxattr(struct dentry *d, char *list, size_t size);
46 int __vfs_setxattr_noperm(struct dentry *, const char *, const void *, size_t, int);
47 int vfs_setxattr(struct dentry *, const char *, const void *, size_t, int);
48 int vfs_removexattr(struct dentry *, const char *);
50 ssize_t generic_getxattr(struct dentry *dentry, const char *name, void *buffer, size_t size);
51 ssize_t generic_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size);
52 int generic_setxattr(struct dentry *dentry, const char *name, const void *value, size_t size, int flags);
53 int generic_removexattr(struct dentry *dentry, const char *name);
54 ssize_t vfs_getxattr_alloc(struct dentry *dentry, const char *name,
55 char **xattr_value, size_t size, gfp_t flags);
56 int vfs_xattr_cmp(struct dentry *dentry, const char *xattr_name,
57 const char *value, size_t size, gfp_t flags);
59 struct simple_xattrs {
60 struct list_head head;
65 struct list_head list;
72 * initialize the simple_xattrs structure
74 static inline void simple_xattrs_init(struct simple_xattrs *xattrs)
76 INIT_LIST_HEAD(&xattrs->head);
77 spin_lock_init(&xattrs->lock);
83 static inline void simple_xattrs_free(struct simple_xattrs *xattrs)
85 struct simple_xattr *xattr, *node;
87 list_for_each_entry_safe(xattr, node, &xattrs->head, list) {
93 struct simple_xattr *simple_xattr_alloc(const void *value, size_t size);
94 int simple_xattr_get(struct simple_xattrs *xattrs, const char *name,
95 void *buffer, size_t size);
96 int simple_xattr_set(struct simple_xattrs *xattrs, const char *name,
97 const void *value, size_t size, int flags);
98 int simple_xattr_remove(struct simple_xattrs *xattrs, const char *name);
99 ssize_t simple_xattr_list(struct simple_xattrs *xattrs, char *buffer,
101 void simple_xattr_list_add(struct simple_xattrs *xattrs,
102 struct simple_xattr *new_xattr);
104 #endif /* _LINUX_XATTR_H */