From patchwork Mon Jan 30 19:12:01 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Grandhi, Sainath" X-Patchwork-Id: 721691 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3vBzcF1W6gz9t5m for ; Tue, 31 Jan 2017 06:15:09 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754200AbdA3TOz (ORCPT ); Mon, 30 Jan 2017 14:14:55 -0500 Received: from mga02.intel.com ([134.134.136.20]:31867 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754116AbdA3TO0 (ORCPT ); Mon, 30 Jan 2017 14:14:26 -0500 Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga101.jf.intel.com with ESMTP; 30 Jan 2017 11:14:02 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.33,312,1477983600"; d="scan'208";a="815134086" Received: from otc-grantley-03.jf.intel.com ([10.54.39.22]) by FMSMGA003.fm.intel.com with ESMTP; 30 Jan 2017 11:14:02 -0800 From: Sainath Grandhi To: netdev@vger.kernel.org Cc: davem@davemloft.net, mahesh@bandewar.net, linux-kernel@vger.kernel.org, sainath.grandhi@intel.com Subject: [PATCHv3 6/7] tap: tap as an independent module Date: Mon, 30 Jan 2017 11:12:01 -0800 Message-Id: <1485803522-16564-7-git-send-email-sainath.grandhi@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1485803522-16564-1-git-send-email-sainath.grandhi@intel.com> References: <1485803522-16564-1-git-send-email-sainath.grandhi@intel.com> Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This patch makes tap a separate module for other types of virtual interfaces, for example, ipvlan to use. Signed-off-by: Sainath Grandhi --- drivers/net/Kconfig | 15 +++++++++++++++ drivers/net/Makefile | 3 +-- drivers/net/{macvtap_main.c => macvtap.c} | 0 drivers/net/tap.c | 11 +++++++++++ drivers/vhost/Kconfig | 2 +- include/linux/if_tap.h | 4 ++-- 6 files changed, 30 insertions(+), 5 deletions(-) rename drivers/net/{macvtap_main.c => macvtap.c} (100%) diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig index 95c32f2..1c88437 100644 --- a/drivers/net/Kconfig +++ b/drivers/net/Kconfig @@ -135,6 +135,7 @@ config MACVTAP tristate "MAC-VLAN based tap driver" depends on MACVLAN depends on INET + depends on TAP help This adds a specialized tap character device driver that is based on the MAC-VLAN network interface, called macvtap. A macvtap device @@ -284,6 +285,20 @@ config TUN If you don't know what to use this for, you don't need it. +config TAP + tristate "TAP module support for virtual interfaces" + ---help--- + TAP module serves two purposes. This can be used as library of functions + for virtual interfaces to implement tap functionality. + + This module also includes character device file and socket operations + that can be used by virtual interface implementing tap. + + To compile this driver as a module, choose M here: the module + will be called tap. + + If you don't know what to use this for, you don't need it. + config TUN_VNET_CROSS_LE bool "Support for cross-endian vnet headers on little-endian kernels" default n diff --git a/drivers/net/Makefile b/drivers/net/Makefile index 19b03a9..7dd86ca 100644 --- a/drivers/net/Makefile +++ b/drivers/net/Makefile @@ -21,6 +21,7 @@ obj-$(CONFIG_PHYLIB) += phy/ obj-$(CONFIG_RIONET) += rionet.o obj-$(CONFIG_NET_TEAM) += team/ obj-$(CONFIG_TUN) += tun.o +obj-$(CONFIG_TAP) += tap.o obj-$(CONFIG_VETH) += veth.o obj-$(CONFIG_VIRTIO_NET) += virtio_net.o obj-$(CONFIG_VXLAN) += vxlan.o @@ -29,8 +30,6 @@ obj-$(CONFIG_GTP) += gtp.o obj-$(CONFIG_NLMON) += nlmon.o obj-$(CONFIG_NET_VRF) += vrf.o -macvtap-objs := macvtap_main.o tap.o - # # Networking Drivers # diff --git a/drivers/net/macvtap_main.c b/drivers/net/macvtap.c similarity index 100% rename from drivers/net/macvtap_main.c rename to drivers/net/macvtap.c diff --git a/drivers/net/tap.c b/drivers/net/tap.c index 1219ee9..9f49280 100644 --- a/drivers/net/tap.c +++ b/drivers/net/tap.c @@ -311,6 +311,7 @@ void tap_del_queues(struct tap_dev *tap) /* guarantee that any future tap_set_queue will fail */ tap->numvtaps = MAX_TAP_QUEUES; } +EXPORT_SYMBOL_GPL(tap_del_queues); rx_handler_result_t tap_handle_frame(struct sk_buff **pskb) { @@ -388,6 +389,7 @@ rx_handler_result_t tap_handle_frame(struct sk_buff **pskb) kfree_skb(skb); return RX_HANDLER_CONSUMED; } +EXPORT_SYMBOL_GPL(tap_handle_frame); static struct major_info *tap_get_major(int major) { @@ -422,6 +424,7 @@ int tap_get_minor(dev_t major, struct tap_dev *tap) mutex_unlock(&tap_major->minor_lock); return retval < 0 ? retval : 0; } +EXPORT_SYMBOL_GPL(tap_get_minor); void tap_free_minor(dev_t major, struct tap_dev *tap) { @@ -438,6 +441,7 @@ void tap_free_minor(dev_t major, struct tap_dev *tap) } mutex_unlock(&tap_major->minor_lock); } +EXPORT_SYMBOL_GPL(tap_free_minor); static struct tap_dev *dev_get_by_tap_file(int major, int minor) { @@ -1193,6 +1197,7 @@ int tap_queue_resize(struct tap_dev *tap) kfree(arrays); return ret; } +EXPORT_SYMBOL_GPL(tap_queue_resize); static int tap_list_add(dev_t major, const char *device_name) { @@ -1235,6 +1240,7 @@ int tap_create_cdev(struct cdev *tap_cdev, out1: return err; } +EXPORT_SYMBOL_GPL(tap_create_cdev); void tap_destroy_cdev(dev_t major, struct cdev *tap_cdev) { @@ -1248,3 +1254,8 @@ void tap_destroy_cdev(dev_t major, struct cdev *tap_cdev) unregister_chrdev_region(major, TAP_NUM_DEVS); idr_destroy(&tap_major->minor_idr); } +EXPORT_SYMBOL_GPL(tap_destroy_cdev); + +MODULE_AUTHOR("Arnd Bergmann "); +MODULE_AUTHOR("Sainath Grandhi "); +MODULE_LICENSE("GPL"); diff --git a/drivers/vhost/Kconfig b/drivers/vhost/Kconfig index 40764ec..cfdecea 100644 --- a/drivers/vhost/Kconfig +++ b/drivers/vhost/Kconfig @@ -1,6 +1,6 @@ config VHOST_NET tristate "Host kernel accelerator for virtio net" - depends on NET && EVENTFD && (TUN || !TUN) && (MACVTAP || !MACVTAP) + depends on NET && EVENTFD && (TUN || !TUN) && (TAP || !TAP) select VHOST ---help--- This kernel module can be loaded in host kernel to accelerate diff --git a/include/linux/if_tap.h b/include/linux/if_tap.h index 362e71c..3482c3c 100644 --- a/include/linux/if_tap.h +++ b/include/linux/if_tap.h @@ -1,7 +1,7 @@ #ifndef _LINUX_IF_TAP_H_ #define _LINUX_IF_TAP_H_ -#if IS_ENABLED(CONFIG_MACVTAP) +#if IS_ENABLED(CONFIG_TAP) struct socket *tap_get_socket(struct file *); #else #include @@ -12,7 +12,7 @@ static inline struct socket *tap_get_socket(struct file *f) { return ERR_PTR(-EINVAL); } -#endif /* CONFIG_MACVTAP */ +#endif /* CONFIG_TAP */ #include #include