~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/include/linux/if_tap.h

Version: ~ [ linux-5.3-rc1 ] ~ [ linux-5.2.2 ] ~ [ linux-5.1.19 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.60 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.134 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.186 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.186 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.70 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.39.4 ] ~ [ linux-2.6.38.8 ] ~ [ linux-2.6.37.6 ] ~ [ linux-2.6.36.4 ] ~ [ linux-2.6.35.14 ] ~ [ linux-2.6.34.15 ] ~ [ linux-2.6.33.20 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /* SPDX-License-Identifier: GPL-2.0 */
  2 #ifndef _LINUX_IF_TAP_H_
  3 #define _LINUX_IF_TAP_H_
  4 
  5 #if IS_ENABLED(CONFIG_TAP)
  6 struct socket *tap_get_socket(struct file *);
  7 struct ptr_ring *tap_get_ptr_ring(struct file *file);
  8 #else
  9 #include <linux/err.h>
 10 #include <linux/errno.h>
 11 struct file;
 12 struct socket;
 13 static inline struct socket *tap_get_socket(struct file *f)
 14 {
 15         return ERR_PTR(-EINVAL);
 16 }
 17 static inline struct ptr_ring *tap_get_ptr_ring(struct file *f)
 18 {
 19         return ERR_PTR(-EINVAL);
 20 }
 21 #endif /* CONFIG_TAP */
 22 
 23 #include <net/sock.h>
 24 #include <linux/skb_array.h>
 25 
 26 /*
 27  * Maximum times a tap device can be opened. This can be used to
 28  * configure the number of receive queue, e.g. for multiqueue virtio.
 29  */
 30 #define MAX_TAP_QUEUES 256
 31 
 32 struct tap_queue;
 33 
 34 struct tap_dev {
 35         struct net_device       *dev;
 36         u16                     flags;
 37         /* This array tracks active taps. */
 38         struct tap_queue    __rcu *taps[MAX_TAP_QUEUES];
 39         /* This list tracks all taps (both enabled and disabled) */
 40         struct list_head        queue_list;
 41         int                     numvtaps;
 42         int                     numqueues;
 43         netdev_features_t       tap_features;
 44         int                     minor;
 45 
 46         void (*update_features)(struct tap_dev *tap, netdev_features_t features);
 47         void (*count_tx_dropped)(struct tap_dev *tap);
 48         void (*count_rx_dropped)(struct tap_dev *tap);
 49 };
 50 
 51 /*
 52  * A tap queue is the central object of tap module, it connects
 53  * an open character device to virtual interface. There can be
 54  * multiple queues on one interface, which map back to queues
 55  * implemented in hardware on the underlying device.
 56  *
 57  * tap_proto is used to allocate queues through the sock allocation
 58  * mechanism.
 59  *
 60  */
 61 
 62 struct tap_queue {
 63         struct sock sk;
 64         struct socket sock;
 65         struct socket_wq wq;
 66         int vnet_hdr_sz;
 67         struct tap_dev __rcu *tap;
 68         struct file *file;
 69         unsigned int flags;
 70         u16 queue_index;
 71         bool enabled;
 72         struct list_head next;
 73         struct ptr_ring ring;
 74 };
 75 
 76 rx_handler_result_t tap_handle_frame(struct sk_buff **pskb);
 77 void tap_del_queues(struct tap_dev *tap);
 78 int tap_get_minor(dev_t major, struct tap_dev *tap);
 79 void tap_free_minor(dev_t major, struct tap_dev *tap);
 80 int tap_queue_resize(struct tap_dev *tap);
 81 int tap_create_cdev(struct cdev *tap_cdev, dev_t *tap_major,
 82                     const char *device_name, struct module *module);
 83 void tap_destroy_cdev(dev_t major, struct cdev *tap_cdev);
 84 
 85 #endif /*_LINUX_IF_TAP_H_*/
 86 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp