ext4: support xattr gnu.* namespace for the Hurd

[linux-2.6-microblaze.git] / fs / ext4 / xattr_hurd.c

diff --git a/fs/ext4/xattr_hurd.c b/fs/ext4/xattr_hurd.c
new file mode 100644 (file)
index 0000000..8cfa74a
--- /dev/null
+++ b/fs/ext4/xattr_hurd.c
@@ -0,0 +1,51 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * linux/fs/ext4/xattr_hurd.c
+ * Handler for extended gnu attributes for the Hurd.
+ *
+ * Copyright (C) 2001 by Andreas Gruenbacher, <a.gruenbacher@computer.org>
+ * Copyright (C) 2020 by Jan (janneke) Nieuwenhuizen, <janneke@gnu.org>
+ */
+
+#include <linux/init.h>
+#include <linux/string.h>
+#include "ext4.h"
+#include "xattr.h"
+
+static bool
+ext4_xattr_hurd_list(struct dentry *dentry)
+{
+       return test_opt(dentry->d_sb, XATTR_USER);
+}
+
+static int
+ext4_xattr_hurd_get(const struct xattr_handler *handler,
+                   struct dentry *unused, struct inode *inode,
+                   const char *name, void *buffer, size_t size)
+{
+       if (!test_opt(inode->i_sb, XATTR_USER))
+               return -EOPNOTSUPP;
+
+       return ext4_xattr_get(inode, EXT4_XATTR_INDEX_HURD,
+                             name, buffer, size);
+}
+
+static int
+ext4_xattr_hurd_set(const struct xattr_handler *handler,
+                   struct dentry *unused, struct inode *inode,
+                   const char *name, const void *value,
+                   size_t size, int flags)
+{
+       if (!test_opt(inode->i_sb, XATTR_USER))
+               return -EOPNOTSUPP;
+
+       return ext4_xattr_set(inode, EXT4_XATTR_INDEX_HURD,
+                             name, value, size, flags);
+}
+
+const struct xattr_handler ext4_xattr_hurd_handler = {
+       .prefix = XATTR_HURD_PREFIX,
+       .list   = ext4_xattr_hurd_list,
+       .get    = ext4_xattr_hurd_get,
+       .set    = ext4_xattr_hurd_set,
+};