1 files changed, 55 insertions, 0 deletions
diff --git a/fs/reiserfs/xattr_trusted.c b/fs/reiserfs/xattr_trusted.c
new file mode 100644
index 000000000000..ebba1ebf28ad
--- /dev/null
+++ b/fs/reiserfs/xattr_trusted.c
@@ -0,0 +1,55 @@
+#include "reiserfs.h"
+#include <linux/capability.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/pagemap.h>
+#include <linux/xattr.h>
+#include "xattr.h"
+#include <linux/uaccess.h>
+
+static int
+trusted_get(const struct xattr_handler *handler, struct dentry *dentry,
+	    const char *name, void *buffer, size_t size)
+{
+	if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(d_inode(dentry)))
+		return -EPERM;
+
+	return reiserfs_xattr_get(d_inode(dentry),
+				  xattr_full_name(handler, name),
+				  buffer, size);
+}
+
+static int
+trusted_set(const struct xattr_handler *handler, struct dentry *dentry,
+	    const char *name, const void *buffer, size_t size, int flags)
+{
+	if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(d_inode(dentry)))
+		return -EPERM;
+
+	return reiserfs_xattr_set(d_inode(dentry),
+				  xattr_full_name(handler, name),
+				  buffer, size, flags);
+}
+
+static size_t trusted_list(const struct xattr_handler *handler,
+			   struct dentry *dentry, char *list, size_t list_size,
+			   const char *name, size_t name_len)
+{
+	const size_t len = name_len + 1;
+
+	if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(d_inode(dentry)))
+		return 0;
+
+	if (list && len <= list_size) {
+		memcpy(list, name, name_len);
+		list[name_len] = '\0';
+	}
+	return len;
+}
+
+const struct xattr_handler reiserfs_xattr_trusted_handler = {
+	.prefix = XATTR_TRUSTED_PREFIX,
+	.get = trusted_get,
+	.set = trusted_set,
+	.list = trusted_list,
+};