1 files changed, 98 insertions, 0 deletions
diff --git a/kernel/fs/hfsplus/xattr_security.c b/kernel/fs/hfsplus/xattr_security.c
new file mode 100644
index 000000000..aacff00a9
--- /dev/null
+++ b/kernel/fs/hfsplus/xattr_security.c
@@ -0,0 +1,98 @@
+/*
+ * linux/fs/hfsplus/xattr_trusted.c
+ *
+ * Vyacheslav Dubeyko <slava@dubeyko.com>
+ *
+ * Handler for storing security labels as extended attributes.
+ */
+
+#include <linux/security.h>
+#include <linux/nls.h>
+
+#include "hfsplus_fs.h"
+#include "xattr.h"
+#include "acl.h"
+
+static int hfsplus_security_getxattr(struct dentry *dentry, const char *name,
+					void *buffer, size_t size, int type)
+{
+	return hfsplus_getxattr(dentry, name, buffer, size,
+				XATTR_SECURITY_PREFIX,
+				XATTR_SECURITY_PREFIX_LEN);
+}
+
+static int hfsplus_security_setxattr(struct dentry *dentry, const char *name,
+		const void *buffer, size_t size, int flags, int type)
+{
+	return hfsplus_setxattr(dentry, name, buffer, size, flags,
+				XATTR_SECURITY_PREFIX,
+				XATTR_SECURITY_PREFIX_LEN);
+}
+
+static size_t hfsplus_security_listxattr(struct dentry *dentry, char *list,
+		size_t list_size, const char *name, size_t name_len, int type)
+{
+	/*
+	 * This method is not used.
+	 * It is used hfsplus_listxattr() instead of generic_listxattr().
+	 */
+	return -EOPNOTSUPP;
+}
+
+static int hfsplus_initxattrs(struct inode *inode,
+				const struct xattr *xattr_array,
+				void *fs_info)
+{
+	const struct xattr *xattr;
+	char *xattr_name;
+	int err = 0;
+
+	xattr_name = kmalloc(NLS_MAX_CHARSET_SIZE * HFSPLUS_ATTR_MAX_STRLEN + 1,
+		GFP_KERNEL);
+	if (!xattr_name)
+		return -ENOMEM;
+	for (xattr = xattr_array; xattr->name != NULL; xattr++) {
+
+		if (!strcmp(xattr->name, ""))
+			continue;
+
+		strcpy(xattr_name, XATTR_SECURITY_PREFIX);
+		strcpy(xattr_name +
+			XATTR_SECURITY_PREFIX_LEN, xattr->name);
+		memset(xattr_name +
+			XATTR_SECURITY_PREFIX_LEN + strlen(xattr->name), 0, 1);
+
+		err = __hfsplus_setxattr(inode, xattr_name,
+					xattr->value, xattr->value_len, 0);
+		if (err)
+			break;
+	}
+	kfree(xattr_name);
+	return err;
+}
+
+int hfsplus_init_security(struct inode *inode, struct inode *dir,
+				const struct qstr *qstr)
+{
+	return security_inode_init_security(inode, dir, qstr,
+					&hfsplus_initxattrs, NULL);
+}
+
+int hfsplus_init_inode_security(struct inode *inode,
+						struct inode *dir,
+						const struct qstr *qstr)
+{
+	int err;
+
+	err = hfsplus_init_posix_acl(inode, dir);
+	if (!err)
+		err = hfsplus_init_security(inode, dir, qstr);
+	return err;
+}
+
+const struct xattr_handler hfsplus_xattr_security_handler = {
+	.prefix	= XATTR_SECURITY_PREFIX,
+	.list	= hfsplus_security_listxattr,
+	.get	= hfsplus_security_getxattr,
+	.set	= hfsplus_security_setxattr,
+};