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-rw-r--r--include/linux/xattr.h48
1 files changed, 48 insertions, 0 deletions
diff --git a/include/linux/xattr.h b/include/linux/xattr.h
index e5d12203154..2ace7a60316 100644
--- a/include/linux/xattr.h
+++ b/include/linux/xattr.h
@@ -59,7 +59,9 @@
#ifdef __KERNEL__
+#include <linux/slab.h>
#include <linux/types.h>
+#include <linux/spinlock.h>
struct inode;
struct dentry;
@@ -96,6 +98,52 @@ 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 /* __KERNEL__ */
#endif /* _LINUX_XATTR_H */