Merge git://git.infradead.org/jffs2-xattr-2.6

Signed-off-by: David Woodhouse <dwmw2@infradead.org>

1 files changed, 82 insertions, 0 deletions

diff --git a/fs/jffs2/security.c b/fs/jffs2/security.c
new file mode 100644
index 000000000000..52a9894a6364
--- /dev/null
+++ b/fs/jffs2/security.c
@@ -0,0 +1,82 @@
+/*
+ * JFFS2 -- Journalling Flash File System, Version 2.
+ *
+ * Copyright (C) 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 Attachment -------------- */
+int jffs2_init_security(struct inode *inode, struct inode *dir)
+{
+        int rc;
+        size_t len;
+        void *value;
+        char *name;
+
+        rc = security_inode_init_security(inode, dir, &name, &value, &len);
+        if (rc) {
+                if (rc == -EOPNOTSUPP)
+                        return 0;
+                return rc;
+        }
+        rc = do_jffs2_setxattr(inode, JFFS2_XPREFIX_SECURITY, name, value, len, 0);
+
+        kfree(name);
+        kfree(value);
+        return rc;
+}
+
+/* ---- XATTR Handler for "security.*" ----------------- */
+static int jffs2_security_getxattr(struct inode *inode, const char *name,
+                                   void *buffer, size_t size)
+{
+        if (!strcmp(name, ""))
+                return -EINVAL;
+
+        return do_jffs2_getxattr(inode, JFFS2_XPREFIX_SECURITY, name, buffer, size);
+}
+
+static int jffs2_security_setxattr(struct inode *inode, const char *name, const void *buffer,
+                                   size_t size, int flags)
+{
+        if (!strcmp(name, ""))
+                return -EINVAL;
+
+        return do_jffs2_setxattr(inode, JFFS2_XPREFIX_SECURITY, name, buffer, size, flags);
+}
+
+static size_t jffs2_security_listxattr(struct inode *inode, char *list, size_t list_size,
+                                       const char *name, size_t name_len)
+{
+        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;
+}
+
+struct xattr_handler jffs2_security_xattr_handler = {
+        .prefix = XATTR_SECURITY_PREFIX,
+        .list = jffs2_security_listxattr,
+        .set = jffs2_security_setxattr,
+        .get = jffs2_security_getxattr
+};