Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / fs / jffs2 / security.c

diff --git a/kernel/fs/jffs2/security.c b/kernel/fs/jffs2/security.c
new file mode 100644 (file)
index 0000000..d4b43fb
--- /dev/null
+++ b/kernel/fs/jffs2/security.c
@@ -0,0 +1,89 @@
+/*
+ * JFFS2 -- Journalling Flash File System, Version 2.
+ *
+ * Copyright © 2006  NEC Corporation
+ *
+ * Created by KaiGai Kohei <kaigai@ak.jp.nec.com>
+ *
+ * For licensing information, see the file 'LICENCE' in this directory.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/time.h>
+#include <linux/pagemap.h>
+#include <linux/highmem.h>
+#include <linux/crc32.h>
+#include <linux/jffs2.h>
+#include <linux/xattr.h>
+#include <linux/mtd/mtd.h>
+#include <linux/security.h>
+#include "nodelist.h"
+
+/* ---- Initial Security Label(s) Attachment callback --- */
+static int jffs2_initxattrs(struct inode *inode,
+                           const struct xattr *xattr_array, void *fs_info)
+{
+       const struct xattr *xattr;
+       int err = 0;
+
+       for (xattr = xattr_array; xattr->name != NULL; xattr++) {
+               err = do_jffs2_setxattr(inode, JFFS2_XPREFIX_SECURITY,
+                                       xattr->name, xattr->value,
+                                       xattr->value_len, 0);
+               if (err < 0)
+                       break;
+       }
+       return err;
+}
+
+/* ---- Initial Security Label(s) Attachment ----------- */
+int jffs2_init_security(struct inode *inode, struct inode *dir,
+                       const struct qstr *qstr)
+{
+       return security_inode_init_security(inode, dir, qstr,
+                                           &jffs2_initxattrs, NULL);
+}
+
+/* ---- XATTR Handler for "security.*" ----------------- */
+static int jffs2_security_getxattr(struct dentry *dentry, const char *name,
+                                  void *buffer, size_t size, int type)
+{
+       if (!strcmp(name, ""))
+               return -EINVAL;
+
+       return do_jffs2_getxattr(d_inode(dentry), JFFS2_XPREFIX_SECURITY,
+                                name, buffer, size);
+}
+
+static int jffs2_security_setxattr(struct dentry *dentry, const char *name,
+               const void *buffer, size_t size, int flags, int type)
+{
+       if (!strcmp(name, ""))
+               return -EINVAL;
+
+       return do_jffs2_setxattr(d_inode(dentry), JFFS2_XPREFIX_SECURITY,
+                                name, buffer, size, flags);
+}
+
+static size_t jffs2_security_listxattr(struct dentry *dentry, char *list,
+               size_t list_size, const char *name, size_t name_len, int type)
+{
+       size_t retlen = XATTR_SECURITY_PREFIX_LEN + name_len + 1;
+
+       if (list && retlen <= list_size) {
+               strcpy(list, XATTR_SECURITY_PREFIX);
+               strcpy(list + XATTR_SECURITY_PREFIX_LEN, name);
+       }
+
+       return retlen;
+}
+
+const struct xattr_handler jffs2_security_xattr_handler = {
+       .prefix = XATTR_SECURITY_PREFIX,
+       .list = jffs2_security_listxattr,
+       .set = jffs2_security_setxattr,
+       .get = jffs2_security_getxattr
+};