From 392e8802486cb573b916e746010e141a75f507e6 Mon Sep 17 00:00:00 2001
From: Kevin
Date: Sat, 15 Nov 2014 09:58:27 +0800
Subject: init android origin source code
---
ANDROID_3.4.5/fs/ext4/xattr_trusted.c | 58 +++++++++++++++++++++++++++++++++++
1 file changed, 58 insertions(+)
create mode 100644 ANDROID_3.4.5/fs/ext4/xattr_trusted.c
(limited to 'ANDROID_3.4.5/fs/ext4/xattr_trusted.c')
diff --git a/ANDROID_3.4.5/fs/ext4/xattr_trusted.c b/ANDROID_3.4.5/fs/ext4/xattr_trusted.c
new file mode 100644
index 00000000..95f1f4ab
--- /dev/null
+++ b/ANDROID_3.4.5/fs/ext4/xattr_trusted.c
@@ -0,0 +1,58 @@
+/*
+ * linux/fs/ext4/xattr_trusted.c
+ * Handler for trusted extended attributes.
+ *
+ * Copyright (C) 2003 by Andreas Gruenbacher, <a.gruenbacher@computer.org>
+ */
+
+#include <linux/string.h>
+#include <linux/capability.h>
+#include <linux/fs.h>
+#include "ext4_jbd2.h"
+#include "ext4.h"
+#include "xattr.h"
+
+static size_t
+ext4_xattr_trusted_list(struct dentry *dentry, char *list, size_t list_size,
+ const char *name, size_t name_len, int type)
+{
+ const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN;
+ const size_t total_len = prefix_len + name_len + 1;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return 0;
+
+ if (list && total_len <= list_size) {
+ memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len);
+ memcpy(list+prefix_len, name, name_len);
+ list[prefix_len + name_len] = '\0';
+ }
+ return total_len;
+}
+
+static int
+ext4_xattr_trusted_get(struct dentry *dentry, const char *name, void *buffer,
+ size_t size, int type)
+{
+ if (strcmp(name, "") == 0)
+ return -EINVAL;
+ return ext4_xattr_get(dentry->d_inode, EXT4_XATTR_INDEX_TRUSTED,
+ name, buffer, size);
+}
+
+static int
+ext4_xattr_trusted_set(struct dentry *dentry, const char *name,
+ const void *value, size_t size, int flags, int type)
+{
+ if (strcmp(name, "") == 0)
+ return -EINVAL;
+ return ext4_xattr_set(dentry->d_inode, EXT4_XATTR_INDEX_TRUSTED,
+ name, value, size, flags);
+}
+
+const struct xattr_handler ext4_xattr_trusted_handler = {
+ .prefix = XATTR_TRUSTED_PREFIX,
+ .list = ext4_xattr_trusted_list,
+ .get = ext4_xattr_trusted_get,
+ .set = ext4_xattr_trusted_set,
+};
--
cgit