1 files changed, 100 insertions, 0 deletions

diff --git a/kernel/include/linux/xattr.h b/kernel/include/linux/xattr.h
new file mode 100644
index 000000000..91b0a68d3
--- /dev/null
+++ b/kernel/include/linux/xattr.h
@@ -0,0 +1,100 @@
+/*
+  File: linux/xattr.h
+
+  Extended attributes handling.
+
+  Copyright (C) 2001 by Andreas Gruenbacher <a.gruenbacher@computer.org>
+  Copyright (c) 2001-2002 Silicon Graphics, Inc.  All Rights Reserved.
+  Copyright (c) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com>
+*/
+#ifndef _LINUX_XATTR_H
+#define _LINUX_XATTR_H
+
+
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/spinlock.h>
+#include <uapi/linux/xattr.h>
+
+struct inode;
+struct dentry;
+
+struct xattr_handler {
+	const char *prefix;
+	int flags;	/* fs private flags passed back to the handlers */
+	size_t (*list)(struct dentry *dentry, char *list, size_t list_size,
+		       const char *name, size_t name_len, int handler_flags);
+	int (*get)(struct dentry *dentry, const char *name, void *buffer,
+		   size_t size, int handler_flags);
+	int (*set)(struct dentry *dentry, const char *name, const void *buffer,
+		   size_t size, int flags, int handler_flags);
+};
+
+struct xattr {
+	const char *name;
+	void *value;
+	size_t value_len;
+};
+
+ssize_t xattr_getsecurity(struct inode *, const char *, void *, size_t);
+ssize_t vfs_getxattr(struct dentry *, const char *, void *, size_t);
+ssize_t vfs_listxattr(struct dentry *d, char *list, size_t size);
+int __vfs_setxattr_noperm(struct dentry *, const char *, const void *, size_t, int);
+int vfs_setxattr(struct dentry *, const char *, const void *, size_t, int);
+int vfs_removexattr(struct dentry *, const char *);
+
+ssize_t generic_getxattr(struct dentry *dentry, const char *name, void *buffer, size_t size);
+ssize_t generic_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size);
+int generic_setxattr(struct dentry *dentry, const char *name, const void *value, size_t size, int flags);
+int generic_removexattr(struct dentry *dentry, const char *name);
+ssize_t vfs_getxattr_alloc(struct dentry *dentry, const char *name,
+			   char **xattr_value, size_t size, gfp_t flags);
+int vfs_xattr_cmp(struct dentry *dentry, const char *xattr_name,
+		  const char *value, size_t size, gfp_t flags);
+
+struct simple_xattrs {
+	struct list_head head;
+	spinlock_t lock;
+};
+
+struct simple_xattr {
+	struct list_head list;
+	char *name;
+	size_t size;
+	char value[0];
+};
+
+/*
+ * initialize the simple_xattrs structure
+ */
+static inline void simple_xattrs_init(struct simple_xattrs *xattrs)
+{
+	INIT_LIST_HEAD(&xattrs->head);
+	spin_lock_init(&xattrs->lock);
+}
+
+/*
+ * free all the xattrs
+ */
+static inline void simple_xattrs_free(struct simple_xattrs *xattrs)
+{
+	struct simple_xattr *xattr, *node;
+
+	list_for_each_entry_safe(xattr, node, &xattrs->head, list) {
+		kfree(xattr->name);
+		kfree(xattr);
+	}
+}
+
+struct simple_xattr *simple_xattr_alloc(const void *value, size_t size);
+int simple_xattr_get(struct simple_xattrs *xattrs, const char *name,
+		     void *buffer, size_t size);
+int simple_xattr_set(struct simple_xattrs *xattrs, const char *name,
+		     const void *value, size_t size, int flags);
+int simple_xattr_remove(struct simple_xattrs *xattrs, const char *name);
+ssize_t simple_xattr_list(struct simple_xattrs *xattrs, char *buffer,
+			  size_t size);
+void simple_xattr_list_add(struct simple_xattrs *xattrs,
+			   struct simple_xattr *new_xattr);
+
+#endif	/* _LINUX_XATTR_H */