zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/fs/ext3/xattr_security.c b/ap/os/linux/linux-3.4.x/fs/ext3/xattr_security.c
new file mode 100644
index 0000000..3387664
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/fs/ext3/xattr_security.c
@@ -0,0 +1,77 @@
+/*
+ * linux/fs/ext3/xattr_security.c
+ * Handler for storing security labels as extended attributes.
+ */
+
+#include <linux/security.h>
+#include "ext3.h"
+#include "xattr.h"
+
+static size_t
+ext3_xattr_security_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_SECURITY_PREFIX_LEN;
+ const size_t total_len = prefix_len + name_len + 1;
+
+
+ if (list && total_len <= list_size) {
+ memcpy(list, XATTR_SECURITY_PREFIX, prefix_len);
+ memcpy(list+prefix_len, name, name_len);
+ list[prefix_len + name_len] = '\0';
+ }
+ return total_len;
+}
+
+static int
+ext3_xattr_security_get(struct dentry *dentry, const char *name,
+ void *buffer, size_t size, int type)
+{
+ if (strcmp(name, "") == 0)
+ return -EINVAL;
+ return ext3_xattr_get(dentry->d_inode, EXT3_XATTR_INDEX_SECURITY,
+ name, buffer, size);
+}
+
+static int
+ext3_xattr_security_set(struct dentry *dentry, const char *name,
+ const void *value, size_t size, int flags, int type)
+{
+ if (strcmp(name, "") == 0)
+ return -EINVAL;
+ return ext3_xattr_set(dentry->d_inode, EXT3_XATTR_INDEX_SECURITY,
+ name, value, size, flags);
+}
+
+int ext3_initxattrs(struct inode *inode, const struct xattr *xattr_array,
+ void *fs_info)
+{
+ const struct xattr *xattr;
+ handle_t *handle = fs_info;
+ int err = 0;
+
+ for (xattr = xattr_array; xattr->name != NULL; xattr++) {
+ err = ext3_xattr_set_handle(handle, inode,
+ EXT3_XATTR_INDEX_SECURITY,
+ xattr->name, xattr->value,
+ xattr->value_len, 0);
+ if (err < 0)
+ break;
+ }
+ return err;
+}
+
+int
+ext3_init_security(handle_t *handle, struct inode *inode, struct inode *dir,
+ const struct qstr *qstr)
+{
+ return security_inode_init_security(inode, dir, qstr,
+ &ext3_initxattrs, handle);
+}
+
+const struct xattr_handler ext3_xattr_security_handler = {
+ .prefix = XATTR_SECURITY_PREFIX,
+ .list = ext3_xattr_security_list,
+ .get = ext3_xattr_security_get,
+ .set = ext3_xattr_security_set,
+};