forked from mirrors/linux
tap: Renaming tap related APIs, data structures, macros
Renaming tap related APIs, data structures and macros in tap.c from macvtap_.* to tap_.* Signed-off-by: Sainath Grandhi <sainath.grandhi@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sainath Grandhi
David S. Miller
parent
a8e0469873
commit
635b8c8ecd
6 changed files with 202 additions and 201 deletions
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@ -1,6 +1,6 @@
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#include <linux/etherdevice.h>
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#include <linux/if_macvlan.h>
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#include <linux/if_macvtap.h>
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#include <linux/if_tap.h>
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#include <linux/if_vlan.h>
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#include <linux/interrupt.h>
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#include <linux/nsproxy.h>
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@ -62,7 +62,7 @@ static int macvtap_newlink(struct net *src_net,
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*/
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vlan->tap_features = TUN_OFFLOADS;
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err = netdev_rx_handler_register(dev, macvtap_handle_frame, vlan);
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err = netdev_rx_handler_register(dev, tap_handle_frame, vlan);
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if (err)
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return err;
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@ -82,7 +82,7 @@ static void macvtap_dellink(struct net_device *dev,
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struct list_head *head)
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{
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netdev_rx_handler_unregister(dev);
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macvtap_del_queues(dev);
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tap_del_queues(dev);
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macvlan_dellink(dev, head);
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}
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@ -121,7 +121,7 @@ static int macvtap_device_event(struct notifier_block *unused,
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* been registered but before register_netdevice has
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* finished running.
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*/
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err = macvtap_get_minor(vlan);
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err = tap_get_minor(vlan);
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if (err)
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return notifier_from_errno(err);
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@ -129,7 +129,7 @@ static int macvtap_device_event(struct notifier_block *unused,
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classdev = device_create(&macvtap_class, &dev->dev, devt,
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dev, tap_name);
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if (IS_ERR(classdev)) {
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macvtap_free_minor(vlan);
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tap_free_minor(vlan);
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return notifier_from_errno(PTR_ERR(classdev));
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}
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err = sysfs_create_link(&dev->dev.kobj, &classdev->kobj,
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@ -144,10 +144,10 @@ static int macvtap_device_event(struct notifier_block *unused,
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sysfs_remove_link(&dev->dev.kobj, tap_name);
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devt = MKDEV(MAJOR(macvtap_major), vlan->minor);
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device_destroy(&macvtap_class, devt);
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macvtap_free_minor(vlan);
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tap_free_minor(vlan);
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break;
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case NETDEV_CHANGE_TX_QUEUE_LEN:
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if (macvtap_queue_resize(vlan))
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if (tap_queue_resize(vlan))
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return NOTIFY_BAD;
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break;
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}
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@ -159,7 +159,7 @@ static struct notifier_block macvtap_notifier_block __read_mostly = {
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.notifier_call = macvtap_device_event,
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};
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extern struct file_operations macvtap_fops;
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extern struct file_operations tap_fops;
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static int macvtap_init(void)
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{
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int err;
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@ -169,7 +169,7 @@ static int macvtap_init(void)
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if (err)
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goto out1;
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cdev_init(&macvtap_cdev, &macvtap_fops);
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cdev_init(&macvtap_cdev, &tap_fops);
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err = cdev_add(&macvtap_cdev, macvtap_major, MACVTAP_NUM_DEVS);
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if (err)
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goto out2;
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@ -24,16 +24,16 @@
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#include <linux/skb_array.h>
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/*
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* A macvtap queue is the central object of this driver, it connects
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* A tap queue is the central object of this driver, it connects
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* an open character device to a macvlan interface. There can be
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* multiple queues on one interface, which map back to queues
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* implemented in hardware on the underlying device.
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*
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* macvtap_proto is used to allocate queues through the sock allocation
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* tap_proto is used to allocate queues through the sock allocation
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* mechanism.
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*
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*/
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struct macvtap_queue {
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struct tap_queue {
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struct sock sk;
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struct socket sock;
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struct socket_wq wq;
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@ -47,21 +47,21 @@ struct macvtap_queue {
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struct skb_array skb_array;
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};
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#define MACVTAP_FEATURES (IFF_VNET_HDR | IFF_MULTI_QUEUE)
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#define TAP_IFFEATURES (IFF_VNET_HDR | IFF_MULTI_QUEUE)
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#define MACVTAP_VNET_LE 0x80000000
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#define MACVTAP_VNET_BE 0x40000000
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#define TAP_VNET_LE 0x80000000
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#define TAP_VNET_BE 0x40000000
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#ifdef CONFIG_TUN_VNET_CROSS_LE
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static inline bool macvtap_legacy_is_little_endian(struct macvtap_queue *q)
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static inline bool tap_legacy_is_little_endian(struct tap_queue *q)
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{
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return q->flags & MACVTAP_VNET_BE ? false :
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return q->flags & TAP_VNET_BE ? false :
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virtio_legacy_is_little_endian();
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}
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static long macvtap_get_vnet_be(struct macvtap_queue *q, int __user *sp)
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static long tap_get_vnet_be(struct tap_queue *q, int __user *sp)
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{
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int s = !!(q->flags & MACVTAP_VNET_BE);
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int s = !!(q->flags & TAP_VNET_BE);
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if (put_user(s, sp))
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return -EFAULT;
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@ -69,7 +69,7 @@ static long macvtap_get_vnet_be(struct macvtap_queue *q, int __user *sp)
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return 0;
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}
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static long macvtap_set_vnet_be(struct macvtap_queue *q, int __user *sp)
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static long tap_set_vnet_be(struct tap_queue *q, int __user *sp)
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{
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int s;
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@ -77,77 +77,77 @@ static long macvtap_set_vnet_be(struct macvtap_queue *q, int __user *sp)
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return -EFAULT;
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if (s)
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q->flags |= MACVTAP_VNET_BE;
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q->flags |= TAP_VNET_BE;
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else
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q->flags &= ~MACVTAP_VNET_BE;
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q->flags &= ~TAP_VNET_BE;
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return 0;
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}
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#else
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static inline bool macvtap_legacy_is_little_endian(struct macvtap_queue *q)
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static inline bool tap_legacy_is_little_endian(struct tap_queue *q)
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{
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return virtio_legacy_is_little_endian();
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}
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static long macvtap_get_vnet_be(struct macvtap_queue *q, int __user *argp)
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static long tap_get_vnet_be(struct tap_queue *q, int __user *argp)
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{
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return -EINVAL;
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}
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static long macvtap_set_vnet_be(struct macvtap_queue *q, int __user *argp)
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static long tap_set_vnet_be(struct tap_queue *q, int __user *argp)
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{
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return -EINVAL;
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}
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#endif /* CONFIG_TUN_VNET_CROSS_LE */
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static inline bool macvtap_is_little_endian(struct macvtap_queue *q)
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static inline bool tap_is_little_endian(struct tap_queue *q)
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{
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return q->flags & MACVTAP_VNET_LE ||
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macvtap_legacy_is_little_endian(q);
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return q->flags & TAP_VNET_LE ||
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tap_legacy_is_little_endian(q);
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}
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static inline u16 macvtap16_to_cpu(struct macvtap_queue *q, __virtio16 val)
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static inline u16 tap16_to_cpu(struct tap_queue *q, __virtio16 val)
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{
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return __virtio16_to_cpu(macvtap_is_little_endian(q), val);
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return __virtio16_to_cpu(tap_is_little_endian(q), val);
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}
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static inline __virtio16 cpu_to_macvtap16(struct macvtap_queue *q, u16 val)
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static inline __virtio16 cpu_to_tap16(struct tap_queue *q, u16 val)
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{
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return __cpu_to_virtio16(macvtap_is_little_endian(q), val);
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return __cpu_to_virtio16(tap_is_little_endian(q), val);
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}
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static struct proto macvtap_proto = {
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.name = "macvtap",
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static struct proto tap_proto = {
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.name = "tap",
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.owner = THIS_MODULE,
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.obj_size = sizeof (struct macvtap_queue),
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.obj_size = sizeof(struct tap_queue),
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};
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#define MACVTAP_NUM_DEVS (1U << MINORBITS)
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#define TAP_NUM_DEVS (1U << MINORBITS)
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static DEFINE_MUTEX(minor_lock);
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DEFINE_IDR(minor_idr);
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#define GOODCOPY_LEN 128
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static const struct proto_ops macvtap_socket_ops;
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static const struct proto_ops tap_socket_ops;
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#define RX_OFFLOADS (NETIF_F_GRO | NETIF_F_LRO)
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#define TAP_FEATURES (NETIF_F_GSO | NETIF_F_SG | NETIF_F_FRAGLIST)
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static struct macvlan_dev *macvtap_get_vlan_rcu(const struct net_device *dev)
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static struct macvlan_dev *tap_get_vlan_rcu(const struct net_device *dev)
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{
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return rcu_dereference(dev->rx_handler_data);
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}
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/*
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* RCU usage:
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* The macvtap_queue and the macvlan_dev are loosely coupled, the
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* The tap_queue and the macvlan_dev are loosely coupled, the
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* pointers from one to the other can only be read while rcu_read_lock
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* or rtnl is held.
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*
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* Both the file and the macvlan_dev hold a reference on the macvtap_queue
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* Both the file and the macvlan_dev hold a reference on the tap_queue
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* through sock_hold(&q->sk). When the macvlan_dev goes away first,
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* q->vlan becomes inaccessible. When the files gets closed,
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* macvtap_get_queue() fails.
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* tap_get_queue() fails.
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*
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* There may still be references to the struct sock inside of the
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* queue from outbound SKBs, but these never reference back to the
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@ -155,8 +155,8 @@ static struct macvlan_dev *macvtap_get_vlan_rcu(const struct net_device *dev)
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* when both our references and any pending SKBs are gone.
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*/
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static int macvtap_enable_queue(struct net_device *dev, struct file *file,
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struct macvtap_queue *q)
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static int tap_enable_queue(struct net_device *dev, struct file *file,
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struct tap_queue *q)
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{
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struct macvlan_dev *vlan = netdev_priv(dev);
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int err = -EINVAL;
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@ -177,12 +177,12 @@ static int macvtap_enable_queue(struct net_device *dev, struct file *file,
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}
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/* Requires RTNL */
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static int macvtap_set_queue(struct net_device *dev, struct file *file,
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struct macvtap_queue *q)
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static int tap_set_queue(struct net_device *dev, struct file *file,
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struct tap_queue *q)
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{
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struct macvlan_dev *vlan = netdev_priv(dev);
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if (vlan->numqueues == MAX_MACVTAP_QUEUES)
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if (vlan->numqueues == MAX_TAP_QUEUES)
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return -EBUSY;
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rcu_assign_pointer(q->vlan, vlan);
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@ -201,10 +201,10 @@ static int macvtap_set_queue(struct net_device *dev, struct file *file,
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return 0;
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}
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static int macvtap_disable_queue(struct macvtap_queue *q)
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static int tap_disable_queue(struct tap_queue *q)
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{
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struct macvlan_dev *vlan;
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struct macvtap_queue *nq;
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struct tap_queue *nq;
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ASSERT_RTNL();
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if (!q->enabled)
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@ -236,7 +236,7 @@ static int macvtap_disable_queue(struct macvtap_queue *q)
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* Using the spinlock makes sure that we don't get
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* to the queue again after destroying it.
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*/
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static void macvtap_put_queue(struct macvtap_queue *q)
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static void tap_put_queue(struct tap_queue *q)
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{
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struct macvlan_dev *vlan;
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@ -245,7 +245,7 @@ static void macvtap_put_queue(struct macvtap_queue *q)
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if (vlan) {
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if (q->enabled)
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BUG_ON(macvtap_disable_queue(q));
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BUG_ON(tap_disable_queue(q));
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vlan->numqueues--;
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RCU_INIT_POINTER(q->vlan, NULL);
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@ -266,11 +266,11 @@ static void macvtap_put_queue(struct macvtap_queue *q)
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* Cache vlan->numvtaps since it can become zero during the execution
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* of this function.
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*/
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static struct macvtap_queue *macvtap_get_queue(struct net_device *dev,
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struct sk_buff *skb)
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static struct tap_queue *tap_get_queue(struct net_device *dev,
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struct sk_buff *skb)
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{
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struct macvlan_dev *vlan = netdev_priv(dev);
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struct macvtap_queue *tap = NULL;
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struct tap_queue *tap = NULL;
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/* Access to taps array is protected by rcu, but access to numvtaps
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* isn't. Below we use it to lookup a queue, but treat it as a hint
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* and validate that the result isn't NULL - in case we are
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@ -313,10 +313,10 @@ static struct macvtap_queue *macvtap_get_queue(struct net_device *dev,
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* that it holds on all queues and safely set the pointer
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* from the queues to NULL.
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*/
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void macvtap_del_queues(struct net_device *dev)
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void tap_del_queues(struct net_device *dev)
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{
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struct macvlan_dev *vlan = netdev_priv(dev);
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struct macvtap_queue *q, *tmp;
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struct tap_queue *q, *tmp;
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ASSERT_RTNL();
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list_for_each_entry_safe(q, tmp, &vlan->queue_list, next) {
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@ -329,23 +329,23 @@ void macvtap_del_queues(struct net_device *dev)
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}
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BUG_ON(vlan->numvtaps);
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BUG_ON(vlan->numqueues);
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/* guarantee that any future macvtap_set_queue will fail */
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vlan->numvtaps = MAX_MACVTAP_QUEUES;
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/* guarantee that any future tap_set_queue will fail */
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vlan->numvtaps = MAX_TAP_QUEUES;
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}
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rx_handler_result_t macvtap_handle_frame(struct sk_buff **pskb)
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rx_handler_result_t tap_handle_frame(struct sk_buff **pskb)
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{
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struct sk_buff *skb = *pskb;
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struct net_device *dev = skb->dev;
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struct macvlan_dev *vlan;
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struct macvtap_queue *q;
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struct tap_queue *q;
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netdev_features_t features = TAP_FEATURES;
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vlan = macvtap_get_vlan_rcu(dev);
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vlan = tap_get_vlan_rcu(dev);
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if (!vlan)
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return RX_HANDLER_PASS;
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q = macvtap_get_queue(dev, skb);
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q = tap_get_queue(dev, skb);
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if (!q)
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return RX_HANDLER_PASS;
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@ -409,23 +409,23 @@ rx_handler_result_t macvtap_handle_frame(struct sk_buff **pskb)
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return RX_HANDLER_CONSUMED;
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}
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int macvtap_get_minor(struct macvlan_dev *vlan)
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int tap_get_minor(struct macvlan_dev *vlan)
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{
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int retval = -ENOMEM;
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mutex_lock(&minor_lock);
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retval = idr_alloc(&minor_idr, vlan, 1, MACVTAP_NUM_DEVS, GFP_KERNEL);
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retval = idr_alloc(&minor_idr, vlan, 1, TAP_NUM_DEVS, GFP_KERNEL);
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if (retval >= 0) {
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vlan->minor = retval;
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} else if (retval == -ENOSPC) {
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netdev_err(vlan->dev, "Too many macvtap devices\n");
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netdev_err(vlan->dev, "Too many tap devices\n");
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retval = -EINVAL;
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}
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mutex_unlock(&minor_lock);
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return retval < 0 ? retval : 0;
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}
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void macvtap_free_minor(struct macvlan_dev *vlan)
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void tap_free_minor(struct macvlan_dev *vlan)
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{
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mutex_lock(&minor_lock);
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if (vlan->minor) {
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@ -435,7 +435,7 @@ void macvtap_free_minor(struct macvlan_dev *vlan)
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mutex_unlock(&minor_lock);
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}
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static struct net_device *dev_get_by_macvtap_minor(int minor)
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static struct net_device *dev_get_by_tap_minor(int minor)
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{
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struct net_device *dev = NULL;
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struct macvlan_dev *vlan;
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@ -450,7 +450,7 @@ static struct net_device *dev_get_by_macvtap_minor(int minor)
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return dev;
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}
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static void macvtap_sock_write_space(struct sock *sk)
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static void tap_sock_write_space(struct sock *sk)
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{
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wait_queue_head_t *wqueue;
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@ -463,28 +463,28 @@ static void macvtap_sock_write_space(struct sock *sk)
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wake_up_interruptible_poll(wqueue, POLLOUT | POLLWRNORM | POLLWRBAND);
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}
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static void macvtap_sock_destruct(struct sock *sk)
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static void tap_sock_destruct(struct sock *sk)
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{
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struct macvtap_queue *q = container_of(sk, struct macvtap_queue, sk);
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struct tap_queue *q = container_of(sk, struct tap_queue, sk);
|
||||
|
||||
skb_array_cleanup(&q->skb_array);
|
||||
}
|
||||
|
||||
static int macvtap_open(struct inode *inode, struct file *file)
|
||||
static int tap_open(struct inode *inode, struct file *file)
|
||||
{
|
||||
struct net *net = current->nsproxy->net_ns;
|
||||
struct net_device *dev;
|
||||
struct macvtap_queue *q;
|
||||
struct tap_queue *q;
|
||||
int err = -ENODEV;
|
||||
|
||||
rtnl_lock();
|
||||
dev = dev_get_by_macvtap_minor(iminor(inode));
|
||||
dev = dev_get_by_tap_minor(iminor(inode));
|
||||
if (!dev)
|
||||
goto err;
|
||||
|
||||
err = -ENOMEM;
|
||||
q = (struct macvtap_queue *)sk_alloc(net, AF_UNSPEC, GFP_KERNEL,
|
||||
&macvtap_proto, 0);
|
||||
q = (struct tap_queue *)sk_alloc(net, AF_UNSPEC, GFP_KERNEL,
|
||||
&tap_proto, 0);
|
||||
if (!q)
|
||||
goto err;
|
||||
|
||||
|
|
@ -493,15 +493,15 @@ static int macvtap_open(struct inode *inode, struct file *file)
|
|||
q->sock.type = SOCK_RAW;
|
||||
q->sock.state = SS_CONNECTED;
|
||||
q->sock.file = file;
|
||||
q->sock.ops = &macvtap_socket_ops;
|
||||
q->sock.ops = &tap_socket_ops;
|
||||
sock_init_data(&q->sock, &q->sk);
|
||||
q->sk.sk_write_space = macvtap_sock_write_space;
|
||||
q->sk.sk_destruct = macvtap_sock_destruct;
|
||||
q->sk.sk_write_space = tap_sock_write_space;
|
||||
q->sk.sk_destruct = tap_sock_destruct;
|
||||
q->flags = IFF_VNET_HDR | IFF_NO_PI | IFF_TAP;
|
||||
q->vnet_hdr_sz = sizeof(struct virtio_net_hdr);
|
||||
|
||||
/*
|
||||
* so far only KVM virtio_net uses macvtap, enable zero copy between
|
||||
* so far only KVM virtio_net uses tap, enable zero copy between
|
||||
* guest kernel and host kernel when lower device supports zerocopy
|
||||
*
|
||||
* The macvlan supports zerocopy iff the lower device supports zero
|
||||
|
|
@ -514,7 +514,7 @@ static int macvtap_open(struct inode *inode, struct file *file)
|
|||
if (skb_array_init(&q->skb_array, dev->tx_queue_len, GFP_KERNEL))
|
||||
goto err_array;
|
||||
|
||||
err = macvtap_set_queue(dev, file, q);
|
||||
err = tap_set_queue(dev, file, q);
|
||||
if (err)
|
||||
goto err_queue;
|
||||
|
||||
|
|
@ -535,16 +535,16 @@ static int macvtap_open(struct inode *inode, struct file *file)
|
|||
return err;
|
||||
}
|
||||
|
||||
static int macvtap_release(struct inode *inode, struct file *file)
|
||||
static int tap_release(struct inode *inode, struct file *file)
|
||||
{
|
||||
struct macvtap_queue *q = file->private_data;
|
||||
macvtap_put_queue(q);
|
||||
struct tap_queue *q = file->private_data;
|
||||
tap_put_queue(q);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static unsigned int macvtap_poll(struct file *file, poll_table * wait)
|
||||
static unsigned int tap_poll(struct file *file, poll_table *wait)
|
||||
{
|
||||
struct macvtap_queue *q = file->private_data;
|
||||
struct tap_queue *q = file->private_data;
|
||||
unsigned int mask = POLLERR;
|
||||
|
||||
if (!q)
|
||||
|
|
@ -565,8 +565,8 @@ static unsigned int macvtap_poll(struct file *file, poll_table * wait)
|
|||
return mask;
|
||||
}
|
||||
|
||||
static inline struct sk_buff *macvtap_alloc_skb(struct sock *sk, size_t prepad,
|
||||
size_t len, size_t linear,
|
||||
static inline struct sk_buff *tap_alloc_skb(struct sock *sk, size_t prepad,
|
||||
size_t len, size_t linear,
|
||||
int noblock, int *err)
|
||||
{
|
||||
struct sk_buff *skb;
|
||||
|
|
@ -589,13 +589,13 @@ static inline struct sk_buff *macvtap_alloc_skb(struct sock *sk, size_t prepad,
|
|||
}
|
||||
|
||||
/* Neighbour code has some assumptions on HH_DATA_MOD alignment */
|
||||
#define MACVTAP_RESERVE HH_DATA_OFF(ETH_HLEN)
|
||||
#define TAP_RESERVE HH_DATA_OFF(ETH_HLEN)
|
||||
|
||||
/* Get packet from user space buffer */
|
||||
static ssize_t macvtap_get_user(struct macvtap_queue *q, struct msghdr *m,
|
||||
struct iov_iter *from, int noblock)
|
||||
static ssize_t tap_get_user(struct tap_queue *q, struct msghdr *m,
|
||||
struct iov_iter *from, int noblock)
|
||||
{
|
||||
int good_linear = SKB_MAX_HEAD(MACVTAP_RESERVE);
|
||||
int good_linear = SKB_MAX_HEAD(TAP_RESERVE);
|
||||
struct sk_buff *skb;
|
||||
struct macvlan_dev *vlan;
|
||||
unsigned long total_len = iov_iter_count(from);
|
||||
|
|
@ -621,14 +621,14 @@ static ssize_t macvtap_get_user(struct macvtap_queue *q, struct msghdr *m,
|
|||
goto err;
|
||||
iov_iter_advance(from, vnet_hdr_len - sizeof(vnet_hdr));
|
||||
if ((vnet_hdr.flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) &&
|
||||
macvtap16_to_cpu(q, vnet_hdr.csum_start) +
|
||||
macvtap16_to_cpu(q, vnet_hdr.csum_offset) + 2 >
|
||||
macvtap16_to_cpu(q, vnet_hdr.hdr_len))
|
||||
vnet_hdr.hdr_len = cpu_to_macvtap16(q,
|
||||
macvtap16_to_cpu(q, vnet_hdr.csum_start) +
|
||||
macvtap16_to_cpu(q, vnet_hdr.csum_offset) + 2);
|
||||
tap16_to_cpu(q, vnet_hdr.csum_start) +
|
||||
tap16_to_cpu(q, vnet_hdr.csum_offset) + 2 >
|
||||
tap16_to_cpu(q, vnet_hdr.hdr_len))
|
||||
vnet_hdr.hdr_len = cpu_to_tap16(q,
|
||||
tap16_to_cpu(q, vnet_hdr.csum_start) +
|
||||
tap16_to_cpu(q, vnet_hdr.csum_offset) + 2);
|
||||
err = -EINVAL;
|
||||
if (macvtap16_to_cpu(q, vnet_hdr.hdr_len) > len)
|
||||
if (tap16_to_cpu(q, vnet_hdr.hdr_len) > len)
|
||||
goto err;
|
||||
}
|
||||
|
||||
|
|
@ -640,7 +640,7 @@ static ssize_t macvtap_get_user(struct macvtap_queue *q, struct msghdr *m,
|
|||
struct iov_iter i;
|
||||
|
||||
copylen = vnet_hdr.hdr_len ?
|
||||
macvtap16_to_cpu(q, vnet_hdr.hdr_len) : GOODCOPY_LEN;
|
||||
tap16_to_cpu(q, vnet_hdr.hdr_len) : GOODCOPY_LEN;
|
||||
if (copylen > good_linear)
|
||||
copylen = good_linear;
|
||||
else if (copylen < ETH_HLEN)
|
||||
|
|
@ -654,15 +654,15 @@ static ssize_t macvtap_get_user(struct macvtap_queue *q, struct msghdr *m,
|
|||
|
||||
if (!zerocopy) {
|
||||
copylen = len;
|
||||
linear = macvtap16_to_cpu(q, vnet_hdr.hdr_len);
|
||||
linear = tap16_to_cpu(q, vnet_hdr.hdr_len);
|
||||
if (linear > good_linear)
|
||||
linear = good_linear;
|
||||
else if (linear < ETH_HLEN)
|
||||
linear = ETH_HLEN;
|
||||
}
|
||||
|
||||
skb = macvtap_alloc_skb(&q->sk, MACVTAP_RESERVE, copylen,
|
||||
linear, noblock, &err);
|
||||
skb = tap_alloc_skb(&q->sk, TAP_RESERVE, copylen,
|
||||
linear, noblock, &err);
|
||||
if (!skb)
|
||||
goto err;
|
||||
|
||||
|
|
@ -680,7 +680,7 @@ static ssize_t macvtap_get_user(struct macvtap_queue *q, struct msghdr *m,
|
|||
|
||||
if (vnet_hdr_len) {
|
||||
err = virtio_net_hdr_to_skb(skb, &vnet_hdr,
|
||||
macvtap_is_little_endian(q));
|
||||
tap_is_little_endian(q));
|
||||
if (err)
|
||||
goto err_kfree;
|
||||
}
|
||||
|
|
@ -728,18 +728,18 @@ static ssize_t macvtap_get_user(struct macvtap_queue *q, struct msghdr *m,
|
|||
return err;
|
||||
}
|
||||
|
||||
static ssize_t macvtap_write_iter(struct kiocb *iocb, struct iov_iter *from)
|
||||
static ssize_t tap_write_iter(struct kiocb *iocb, struct iov_iter *from)
|
||||
{
|
||||
struct file *file = iocb->ki_filp;
|
||||
struct macvtap_queue *q = file->private_data;
|
||||
struct tap_queue *q = file->private_data;
|
||||
|
||||
return macvtap_get_user(q, NULL, from, file->f_flags & O_NONBLOCK);
|
||||
return tap_get_user(q, NULL, from, file->f_flags & O_NONBLOCK);
|
||||
}
|
||||
|
||||
/* Put packet to the user space buffer */
|
||||
static ssize_t macvtap_put_user(struct macvtap_queue *q,
|
||||
const struct sk_buff *skb,
|
||||
struct iov_iter *iter)
|
||||
static ssize_t tap_put_user(struct tap_queue *q,
|
||||
const struct sk_buff *skb,
|
||||
struct iov_iter *iter)
|
||||
{
|
||||
int ret;
|
||||
int vnet_hdr_len = 0;
|
||||
|
|
@ -753,7 +753,7 @@ static ssize_t macvtap_put_user(struct macvtap_queue *q,
|
|||
return -EINVAL;
|
||||
|
||||
if (virtio_net_hdr_from_skb(skb, &vnet_hdr,
|
||||
macvtap_is_little_endian(q), true))
|
||||
tap_is_little_endian(q), true))
|
||||
BUG();
|
||||
|
||||
if (copy_to_iter(&vnet_hdr, sizeof(vnet_hdr), iter) !=
|
||||
|
|
@ -792,9 +792,9 @@ static ssize_t macvtap_put_user(struct macvtap_queue *q,
|
|||
return ret ? ret : total;
|
||||
}
|
||||
|
||||
static ssize_t macvtap_do_read(struct macvtap_queue *q,
|
||||
struct iov_iter *to,
|
||||
int noblock)
|
||||
static ssize_t tap_do_read(struct tap_queue *q,
|
||||
struct iov_iter *to,
|
||||
int noblock)
|
||||
{
|
||||
DEFINE_WAIT(wait);
|
||||
struct sk_buff *skb;
|
||||
|
|
@ -827,7 +827,7 @@ static ssize_t macvtap_do_read(struct macvtap_queue *q,
|
|||
finish_wait(sk_sleep(&q->sk), &wait);
|
||||
|
||||
if (skb) {
|
||||
ret = macvtap_put_user(q, skb, to);
|
||||
ret = tap_put_user(q, skb, to);
|
||||
if (unlikely(ret < 0))
|
||||
kfree_skb(skb);
|
||||
else
|
||||
|
|
@ -836,20 +836,20 @@ static ssize_t macvtap_do_read(struct macvtap_queue *q,
|
|||
return ret;
|
||||
}
|
||||
|
||||
static ssize_t macvtap_read_iter(struct kiocb *iocb, struct iov_iter *to)
|
||||
static ssize_t tap_read_iter(struct kiocb *iocb, struct iov_iter *to)
|
||||
{
|
||||
struct file *file = iocb->ki_filp;
|
||||
struct macvtap_queue *q = file->private_data;
|
||||
struct tap_queue *q = file->private_data;
|
||||
ssize_t len = iov_iter_count(to), ret;
|
||||
|
||||
ret = macvtap_do_read(q, to, file->f_flags & O_NONBLOCK);
|
||||
ret = tap_do_read(q, to, file->f_flags & O_NONBLOCK);
|
||||
ret = min_t(ssize_t, ret, len);
|
||||
if (ret > 0)
|
||||
iocb->ki_pos = ret;
|
||||
return ret;
|
||||
}
|
||||
|
||||
static struct macvlan_dev *macvtap_get_vlan(struct macvtap_queue *q)
|
||||
static struct macvlan_dev *tap_get_vlan(struct tap_queue *q)
|
||||
{
|
||||
struct macvlan_dev *vlan;
|
||||
|
||||
|
|
@ -861,33 +861,33 @@ static struct macvlan_dev *macvtap_get_vlan(struct macvtap_queue *q)
|
|||
return vlan;
|
||||
}
|
||||
|
||||
static void macvtap_put_vlan(struct macvlan_dev *vlan)
|
||||
static void tap_put_vlan(struct macvlan_dev *vlan)
|
||||
{
|
||||
dev_put(vlan->dev);
|
||||
}
|
||||
|
||||
static int macvtap_ioctl_set_queue(struct file *file, unsigned int flags)
|
||||
static int tap_ioctl_set_queue(struct file *file, unsigned int flags)
|
||||
{
|
||||
struct macvtap_queue *q = file->private_data;
|
||||
struct tap_queue *q = file->private_data;
|
||||
struct macvlan_dev *vlan;
|
||||
int ret;
|
||||
|
||||
vlan = macvtap_get_vlan(q);
|
||||
vlan = tap_get_vlan(q);
|
||||
if (!vlan)
|
||||
return -EINVAL;
|
||||
|
||||
if (flags & IFF_ATTACH_QUEUE)
|
||||
ret = macvtap_enable_queue(vlan->dev, file, q);
|
||||
ret = tap_enable_queue(vlan->dev, file, q);
|
||||
else if (flags & IFF_DETACH_QUEUE)
|
||||
ret = macvtap_disable_queue(q);
|
||||
ret = tap_disable_queue(q);
|
||||
else
|
||||
ret = -EINVAL;
|
||||
|
||||
macvtap_put_vlan(vlan);
|
||||
tap_put_vlan(vlan);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int set_offload(struct macvtap_queue *q, unsigned long arg)
|
||||
static int set_offload(struct tap_queue *q, unsigned long arg)
|
||||
{
|
||||
struct macvlan_dev *vlan;
|
||||
netdev_features_t features;
|
||||
|
|
@ -919,7 +919,7 @@ static int set_offload(struct macvtap_queue *q, unsigned long arg)
|
|||
* setting the TSO bit means that the userspace wants to
|
||||
* accept TSO frames and turning it off means that user space
|
||||
* does not support TSO.
|
||||
* For macvtap, we have to invert it to mean the same thing.
|
||||
* For tap, we have to invert it to mean the same thing.
|
||||
* When user space turns off TSO, we turn off GSO/LRO so that
|
||||
* user-space will not receive TSO frames.
|
||||
*/
|
||||
|
|
@ -941,10 +941,10 @@ static int set_offload(struct macvtap_queue *q, unsigned long arg)
|
|||
/*
|
||||
* provide compatibility with generic tun/tap interface
|
||||
*/
|
||||
static long macvtap_ioctl(struct file *file, unsigned int cmd,
|
||||
unsigned long arg)
|
||||
static long tap_ioctl(struct file *file, unsigned int cmd,
|
||||
unsigned long arg)
|
||||
{
|
||||
struct macvtap_queue *q = file->private_data;
|
||||
struct tap_queue *q = file->private_data;
|
||||
struct macvlan_dev *vlan;
|
||||
void __user *argp = (void __user *)arg;
|
||||
struct ifreq __user *ifr = argp;
|
||||
|
|
@ -962,16 +962,16 @@ static long macvtap_ioctl(struct file *file, unsigned int cmd,
|
|||
return -EFAULT;
|
||||
|
||||
ret = 0;
|
||||
if ((u & ~MACVTAP_FEATURES) != (IFF_NO_PI | IFF_TAP))
|
||||
if ((u & ~TAP_IFFEATURES) != (IFF_NO_PI | IFF_TAP))
|
||||
ret = -EINVAL;
|
||||
else
|
||||
q->flags = (q->flags & ~MACVTAP_FEATURES) | u;
|
||||
q->flags = (q->flags & ~TAP_IFFEATURES) | u;
|
||||
|
||||
return ret;
|
||||
|
||||
case TUNGETIFF:
|
||||
rtnl_lock();
|
||||
vlan = macvtap_get_vlan(q);
|
||||
vlan = tap_get_vlan(q);
|
||||
if (!vlan) {
|
||||
rtnl_unlock();
|
||||
return -ENOLINK;
|
||||
|
|
@ -982,7 +982,7 @@ static long macvtap_ioctl(struct file *file, unsigned int cmd,
|
|||
if (copy_to_user(&ifr->ifr_name, vlan->dev->name, IFNAMSIZ) ||
|
||||
put_user(u, &ifr->ifr_flags))
|
||||
ret = -EFAULT;
|
||||
macvtap_put_vlan(vlan);
|
||||
tap_put_vlan(vlan);
|
||||
rtnl_unlock();
|
||||
return ret;
|
||||
|
||||
|
|
@ -990,12 +990,12 @@ static long macvtap_ioctl(struct file *file, unsigned int cmd,
|
|||
if (get_user(u, &ifr->ifr_flags))
|
||||
return -EFAULT;
|
||||
rtnl_lock();
|
||||
ret = macvtap_ioctl_set_queue(file, u);
|
||||
ret = tap_ioctl_set_queue(file, u);
|
||||
rtnl_unlock();
|
||||
return ret;
|
||||
|
||||
case TUNGETFEATURES:
|
||||
if (put_user(IFF_TAP | IFF_NO_PI | MACVTAP_FEATURES, up))
|
||||
if (put_user(IFF_TAP | IFF_NO_PI | TAP_IFFEATURES, up))
|
||||
return -EFAULT;
|
||||
return 0;
|
||||
|
||||
|
|
@ -1022,7 +1022,7 @@ static long macvtap_ioctl(struct file *file, unsigned int cmd,
|
|||
return 0;
|
||||
|
||||
case TUNGETVNETLE:
|
||||
s = !!(q->flags & MACVTAP_VNET_LE);
|
||||
s = !!(q->flags & TAP_VNET_LE);
|
||||
if (put_user(s, sp))
|
||||
return -EFAULT;
|
||||
return 0;
|
||||
|
|
@ -1031,16 +1031,16 @@ static long macvtap_ioctl(struct file *file, unsigned int cmd,
|
|||
if (get_user(s, sp))
|
||||
return -EFAULT;
|
||||
if (s)
|
||||
q->flags |= MACVTAP_VNET_LE;
|
||||
q->flags |= TAP_VNET_LE;
|
||||
else
|
||||
q->flags &= ~MACVTAP_VNET_LE;
|
||||
q->flags &= ~TAP_VNET_LE;
|
||||
return 0;
|
||||
|
||||
case TUNGETVNETBE:
|
||||
return macvtap_get_vnet_be(q, sp);
|
||||
return tap_get_vnet_be(q, sp);
|
||||
|
||||
case TUNSETVNETBE:
|
||||
return macvtap_set_vnet_be(q, sp);
|
||||
return tap_set_vnet_be(q, sp);
|
||||
|
||||
case TUNSETOFFLOAD:
|
||||
/* let the user check for future flags */
|
||||
|
|
@ -1055,7 +1055,7 @@ static long macvtap_ioctl(struct file *file, unsigned int cmd,
|
|||
|
||||
case SIOCGIFHWADDR:
|
||||
rtnl_lock();
|
||||
vlan = macvtap_get_vlan(q);
|
||||
vlan = tap_get_vlan(q);
|
||||
if (!vlan) {
|
||||
rtnl_unlock();
|
||||
return -ENOLINK;
|
||||
|
|
@ -1066,7 +1066,7 @@ static long macvtap_ioctl(struct file *file, unsigned int cmd,
|
|||
copy_to_user(&ifr->ifr_hwaddr.sa_data, vlan->dev->dev_addr, ETH_ALEN) ||
|
||||
put_user(u, &ifr->ifr_hwaddr.sa_family))
|
||||
ret = -EFAULT;
|
||||
macvtap_put_vlan(vlan);
|
||||
tap_put_vlan(vlan);
|
||||
rtnl_unlock();
|
||||
return ret;
|
||||
|
||||
|
|
@ -1074,13 +1074,13 @@ static long macvtap_ioctl(struct file *file, unsigned int cmd,
|
|||
if (copy_from_user(&sa, &ifr->ifr_hwaddr, sizeof(sa)))
|
||||
return -EFAULT;
|
||||
rtnl_lock();
|
||||
vlan = macvtap_get_vlan(q);
|
||||
vlan = tap_get_vlan(q);
|
||||
if (!vlan) {
|
||||
rtnl_unlock();
|
||||
return -ENOLINK;
|
||||
}
|
||||
ret = dev_set_mac_address(vlan->dev, &sa);
|
||||
macvtap_put_vlan(vlan);
|
||||
tap_put_vlan(vlan);
|
||||
rtnl_unlock();
|
||||
return ret;
|
||||
|
||||
|
|
@ -1090,42 +1090,42 @@ static long macvtap_ioctl(struct file *file, unsigned int cmd,
|
|||
}
|
||||
|
||||
#ifdef CONFIG_COMPAT
|
||||
static long macvtap_compat_ioctl(struct file *file, unsigned int cmd,
|
||||
unsigned long arg)
|
||||
static long tap_compat_ioctl(struct file *file, unsigned int cmd,
|
||||
unsigned long arg)
|
||||
{
|
||||
return macvtap_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
|
||||
return tap_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
|
||||
}
|
||||
#endif
|
||||
|
||||
const struct file_operations macvtap_fops = {
|
||||
const struct file_operations tap_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.open = macvtap_open,
|
||||
.release = macvtap_release,
|
||||
.read_iter = macvtap_read_iter,
|
||||
.write_iter = macvtap_write_iter,
|
||||
.poll = macvtap_poll,
|
||||
.open = tap_open,
|
||||
.release = tap_release,
|
||||
.read_iter = tap_read_iter,
|
||||
.write_iter = tap_write_iter,
|
||||
.poll = tap_poll,
|
||||
.llseek = no_llseek,
|
||||
.unlocked_ioctl = macvtap_ioctl,
|
||||
.unlocked_ioctl = tap_ioctl,
|
||||
#ifdef CONFIG_COMPAT
|
||||
.compat_ioctl = macvtap_compat_ioctl,
|
||||
.compat_ioctl = tap_compat_ioctl,
|
||||
#endif
|
||||
};
|
||||
|
||||
static int macvtap_sendmsg(struct socket *sock, struct msghdr *m,
|
||||
size_t total_len)
|
||||
static int tap_sendmsg(struct socket *sock, struct msghdr *m,
|
||||
size_t total_len)
|
||||
{
|
||||
struct macvtap_queue *q = container_of(sock, struct macvtap_queue, sock);
|
||||
return macvtap_get_user(q, m, &m->msg_iter, m->msg_flags & MSG_DONTWAIT);
|
||||
struct tap_queue *q = container_of(sock, struct tap_queue, sock);
|
||||
return tap_get_user(q, m, &m->msg_iter, m->msg_flags & MSG_DONTWAIT);
|
||||
}
|
||||
|
||||
static int macvtap_recvmsg(struct socket *sock, struct msghdr *m,
|
||||
size_t total_len, int flags)
|
||||
static int tap_recvmsg(struct socket *sock, struct msghdr *m,
|
||||
size_t total_len, int flags)
|
||||
{
|
||||
struct macvtap_queue *q = container_of(sock, struct macvtap_queue, sock);
|
||||
struct tap_queue *q = container_of(sock, struct tap_queue, sock);
|
||||
int ret;
|
||||
if (flags & ~(MSG_DONTWAIT|MSG_TRUNC))
|
||||
return -EINVAL;
|
||||
ret = macvtap_do_read(q, &m->msg_iter, flags & MSG_DONTWAIT);
|
||||
ret = tap_do_read(q, &m->msg_iter, flags & MSG_DONTWAIT);
|
||||
if (ret > total_len) {
|
||||
m->msg_flags |= MSG_TRUNC;
|
||||
ret = flags & MSG_TRUNC ? ret : total_len;
|
||||
|
|
@ -1133,40 +1133,40 @@ static int macvtap_recvmsg(struct socket *sock, struct msghdr *m,
|
|||
return ret;
|
||||
}
|
||||
|
||||
static int macvtap_peek_len(struct socket *sock)
|
||||
static int tap_peek_len(struct socket *sock)
|
||||
{
|
||||
struct macvtap_queue *q = container_of(sock, struct macvtap_queue,
|
||||
struct tap_queue *q = container_of(sock, struct tap_queue,
|
||||
sock);
|
||||
return skb_array_peek_len(&q->skb_array);
|
||||
}
|
||||
|
||||
/* Ops structure to mimic raw sockets with tun */
|
||||
static const struct proto_ops macvtap_socket_ops = {
|
||||
.sendmsg = macvtap_sendmsg,
|
||||
.recvmsg = macvtap_recvmsg,
|
||||
.peek_len = macvtap_peek_len,
|
||||
static const struct proto_ops tap_socket_ops = {
|
||||
.sendmsg = tap_sendmsg,
|
||||
.recvmsg = tap_recvmsg,
|
||||
.peek_len = tap_peek_len,
|
||||
};
|
||||
|
||||
/* Get an underlying socket object from tun file. Returns error unless file is
|
||||
* attached to a device. The returned object works like a packet socket, it
|
||||
* can be used for sock_sendmsg/sock_recvmsg. The caller is responsible for
|
||||
* holding a reference to the file for as long as the socket is in use. */
|
||||
struct socket *macvtap_get_socket(struct file *file)
|
||||
struct socket *tap_get_socket(struct file *file)
|
||||
{
|
||||
struct macvtap_queue *q;
|
||||
if (file->f_op != &macvtap_fops)
|
||||
struct tap_queue *q;
|
||||
if (file->f_op != &tap_fops)
|
||||
return ERR_PTR(-EINVAL);
|
||||
q = file->private_data;
|
||||
if (!q)
|
||||
return ERR_PTR(-EBADFD);
|
||||
return &q->sock;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(macvtap_get_socket);
|
||||
EXPORT_SYMBOL_GPL(tap_get_socket);
|
||||
|
||||
int macvtap_queue_resize(struct macvlan_dev *vlan)
|
||||
int tap_queue_resize(struct macvlan_dev *vlan)
|
||||
{
|
||||
struct net_device *dev = vlan->dev;
|
||||
struct macvtap_queue *q;
|
||||
struct tap_queue *q;
|
||||
struct skb_array **arrays;
|
||||
int n = vlan->numqueues;
|
||||
int ret, i = 0;
|
||||
|
|
|
|||
|
|
@ -24,6 +24,7 @@
|
|||
#include <linux/if_arp.h>
|
||||
#include <linux/if_tun.h>
|
||||
#include <linux/if_macvlan.h>
|
||||
#include <linux/if_tap.h>
|
||||
#include <linux/if_vlan.h>
|
||||
|
||||
#include <net/sock.h>
|
||||
|
|
@ -960,7 +961,7 @@ static struct socket *get_tap_socket(int fd)
|
|||
sock = tun_get_socket(file);
|
||||
if (!IS_ERR(sock))
|
||||
return sock;
|
||||
sock = macvtap_get_socket(file);
|
||||
sock = tap_get_socket(file);
|
||||
if (IS_ERR(sock))
|
||||
fput(file);
|
||||
return sock;
|
||||
|
|
|
|||
|
|
@ -9,19 +9,6 @@
|
|||
#include <net/netlink.h>
|
||||
#include <linux/u64_stats_sync.h>
|
||||
|
||||
#if IS_ENABLED(CONFIG_MACVTAP)
|
||||
struct socket *macvtap_get_socket(struct file *);
|
||||
#else
|
||||
#include <linux/err.h>
|
||||
#include <linux/errno.h>
|
||||
struct file;
|
||||
struct socket;
|
||||
static inline struct socket *macvtap_get_socket(struct file *f)
|
||||
{
|
||||
return ERR_PTR(-EINVAL);
|
||||
}
|
||||
#endif /* CONFIG_MACVTAP */
|
||||
|
||||
struct macvlan_port;
|
||||
struct macvtap_queue;
|
||||
|
||||
|
|
@ -29,7 +16,7 @@ struct macvtap_queue;
|
|||
* Maximum times a macvtap device can be opened. This can be used to
|
||||
* configure the number of receive queue, e.g. for multiqueue virtio.
|
||||
*/
|
||||
#define MAX_MACVTAP_QUEUES 256
|
||||
#define MAX_TAP_QUEUES 256
|
||||
|
||||
#define MACVLAN_MC_FILTER_BITS 8
|
||||
#define MACVLAN_MC_FILTER_SZ (1 << MACVLAN_MC_FILTER_BITS)
|
||||
|
|
@ -49,7 +36,7 @@ struct macvlan_dev {
|
|||
enum macvlan_mode mode;
|
||||
u16 flags;
|
||||
/* This array tracks active taps. */
|
||||
struct macvtap_queue __rcu *taps[MAX_MACVTAP_QUEUES];
|
||||
struct tap_queue __rcu *taps[MAX_TAP_QUEUES];
|
||||
/* This list tracks all taps (both enabled and disabled) */
|
||||
struct list_head queue_list;
|
||||
int numvtaps;
|
||||
|
|
|
|||
|
|
@ -1,10 +0,0 @@
|
|||
#ifndef _LINUX_IF_MACVTAP_H_
|
||||
#define _LINUX_IF_MACVTAP_H_
|
||||
|
||||
rx_handler_result_t macvtap_handle_frame(struct sk_buff **pskb);
|
||||
void macvtap_del_queues(struct net_device *dev);
|
||||
int macvtap_get_minor(struct macvlan_dev *vlan);
|
||||
void macvtap_free_minor(struct macvlan_dev *vlan);
|
||||
int macvtap_queue_resize(struct macvlan_dev *vlan);
|
||||
|
||||
#endif /*_LINUX_IF_MACVTAP_H_*/
|
||||
23
include/linux/if_tap.h
Normal file
23
include/linux/if_tap.h
Normal file
|
|
@ -0,0 +1,23 @@
|
|||
#ifndef _LINUX_IF_TAP_H_
|
||||
#define _LINUX_IF_TAP_H_
|
||||
|
||||
#if IS_ENABLED(CONFIG_MACVTAP)
|
||||
struct socket *tap_get_socket(struct file *);
|
||||
#else
|
||||
#include <linux/err.h>
|
||||
#include <linux/errno.h>
|
||||
struct file;
|
||||
struct socket;
|
||||
static inline struct socket *tap_get_socket(struct file *f)
|
||||
{
|
||||
return ERR_PTR(-EINVAL);
|
||||
}
|
||||
#endif /* CONFIG_MACVTAP */
|
||||
|
||||
rx_handler_result_t tap_handle_frame(struct sk_buff **pskb);
|
||||
void tap_del_queues(struct net_device *dev);
|
||||
int tap_get_minor(struct macvlan_dev *vlan);
|
||||
void tap_free_minor(struct macvlan_dev *vlan);
|
||||
int tap_queue_resize(struct macvlan_dev *vlan);
|
||||
|
||||
#endif /*_LINUX_IF_TAP_H_*/
|
||||
Loading…
Reference in a new issue