2 * Copyright (c) 2010 Nicira Networks.
3 * Distributed under the terms of the GNU GPL version 2.
5 * Significant portions of this file may be copied from parts of the Linux
6 * kernel, by Linus Torvalds and others.
9 #include <linux/dcache.h>
10 #include <linux/etherdevice.h>
12 #include <linux/kernel.h>
13 #include <linux/list.h>
14 #include <linux/mutex.h>
15 #include <linux/percpu.h>
16 #include <linux/rtnetlink.h>
17 #include <linux/compat.h>
20 #include "vport-internal_dev.h"
22 extern struct vport_ops netdev_vport_ops;
23 extern struct vport_ops internal_vport_ops;
24 extern struct vport_ops gre_vport_ops;
26 static struct vport_ops *base_vport_ops_list[] = {
32 static const struct vport_ops **vport_ops_list;
33 static int n_vport_types;
35 static struct hlist_head *dev_table;
36 #define VPORT_HASH_BUCKETS 1024
38 /* Both RTNL lock and vport_mutex need to be held when updating dev_table.
40 * If you use vport_locate and then perform some operations, you need to hold
41 * one of these locks if you don't want the vport to be deleted out from under
44 * If you get a reference to a vport through a dp_port, it is protected
45 * by RCU and you need to hold rcu_read_lock instead when reading.
47 * If multiple locks are taken, the hierarchy is:
52 static DEFINE_MUTEX(vport_mutex);
55 * vport_lock - acquire vport lock
57 * Acquire global vport lock. See above comment about locking requirements
58 * and specific function definitions. May sleep.
63 mutex_lock(&vport_mutex);
67 * vport_unlock - release vport lock
69 * Release lock acquired with vport_lock.
74 mutex_unlock(&vport_mutex);
77 #define ASSERT_VPORT() do { \
78 if (unlikely(!mutex_is_locked(&vport_mutex))) { \
79 printk(KERN_ERR "openvswitch: vport lock not held at %s (%d)\n", \
80 __FILE__, __LINE__); \
86 * vport_init - initialize vport subsystem
88 * Called at module load time to initialize the vport subsystem and any
89 * compiled in vport types.
97 dev_table = kzalloc(VPORT_HASH_BUCKETS * sizeof(struct hlist_head),
104 vport_ops_list = kmalloc(ARRAY_SIZE(base_vport_ops_list) *
105 sizeof(struct vport_ops *), GFP_KERNEL);
106 if (!vport_ops_list) {
108 goto error_dev_table;
111 for (i = 0; i < ARRAY_SIZE(base_vport_ops_list); i++) {
112 struct vport_ops *new_ops = base_vport_ops_list[i];
114 if (new_ops->get_stats && new_ops->flags & VPORT_F_GEN_STATS) {
115 printk(KERN_INFO "openvswitch: both get_stats() and VPORT_F_GEN_STATS defined on vport %s, dropping VPORT_F_GEN_STATS\n", new_ops->type);
116 new_ops->flags &= ~VPORT_F_GEN_STATS;
120 err = new_ops->init();
125 vport_ops_list[n_vport_types++] = new_ops;
126 else if (new_ops->flags & VPORT_F_REQUIRED) {
148 for (i = 0; i < VPORT_HASH_BUCKETS; i++) {
149 struct hlist_head *bucket = &dev_table[i];
151 struct hlist_node *node, *next;
153 hlist_for_each_entry_safe(vport, node, next, bucket, hash_node)
162 * vport_exit - shutdown vport subsystem
164 * Called at module exit time to shutdown the vport subsystem and any
165 * initialized vport types.
174 for (i = 0; i < n_vport_types; i++) {
175 if (vport_ops_list[i]->exit)
176 vport_ops_list[i]->exit();
179 kfree(vport_ops_list);
184 * vport_add - add vport device (for userspace callers)
186 * @uvport_config: New port configuration.
188 * Creates a new vport with the specified configuration (which is dependent
189 * on device type). This function is for userspace callers and assumes no
193 do_vport_add(struct odp_vport_add *vport_config)
198 vport_config->port_type[VPORT_TYPE_SIZE - 1] = '\0';
199 vport_config->devname[IFNAMSIZ - 1] = '\0';
203 vport = vport_locate(vport_config->devname);
210 vport = __vport_add(vport_config->devname, vport_config->port_type,
211 vport_config->config);
215 err = PTR_ERR(vport);
223 vport_add(const struct odp_vport_add __user *uvport_config)
225 struct odp_vport_add vport_config;
227 if (copy_from_user(&vport_config, uvport_config, sizeof(struct odp_vport_add)))
230 return do_vport_add(&vport_config);
235 compat_vport_add(struct compat_odp_vport_add *ucompat)
237 struct compat_odp_vport_add compat;
238 struct odp_vport_add vport_config;
240 if (copy_from_user(&compat, ucompat, sizeof(struct compat_odp_vport_add)))
243 memcpy(vport_config.port_type, compat.port_type, VPORT_TYPE_SIZE);
244 memcpy(vport_config.devname, compat.devname, IFNAMSIZ);
245 vport_config.config = compat_ptr(compat.config);
247 return do_vport_add(&vport_config);
252 * vport_mod - modify existing vport device (for userspace callers)
254 * @uvport_config: New configuration for vport
256 * Modifies an existing device with the specified configuration (which is
257 * dependent on device type). This function is for userspace callers and
258 * assumes no locks are held.
261 do_vport_mod(struct odp_vport_mod *vport_config)
266 vport_config->devname[IFNAMSIZ - 1] = '\0';
270 vport = vport_locate(vport_config->devname);
277 err = __vport_mod(vport, vport_config->config);
286 vport_mod(const struct odp_vport_mod __user *uvport_config)
288 struct odp_vport_mod vport_config;
290 if (copy_from_user(&vport_config, uvport_config, sizeof(struct odp_vport_mod)))
293 return do_vport_mod(&vport_config);
298 compat_vport_mod(struct compat_odp_vport_mod *ucompat)
300 struct compat_odp_vport_mod compat;
301 struct odp_vport_mod vport_config;
303 if (copy_from_user(&compat, ucompat, sizeof(struct compat_odp_vport_mod)))
306 memcpy(vport_config.devname, compat.devname, IFNAMSIZ);
307 vport_config.config = compat_ptr(compat.config);
309 return do_vport_mod(&vport_config);
314 * vport_del - delete existing vport device (for userspace callers)
316 * @udevname: Name of device to delete
318 * Deletes the specified device. Detaches the device from a datapath first
319 * if it is attached. Deleting the device will fail if it does not exist or it
320 * is the datapath local port. It is also possible to fail for less obvious
321 * reasons, such as lack of memory. This function is for userspace callers and
322 * assumes no locks are held.
325 vport_del(const char __user *udevname)
327 char devname[IFNAMSIZ];
329 struct dp_port *dp_port;
333 retval = strncpy_from_user(devname, udevname, IFNAMSIZ);
336 else if (retval >= IFNAMSIZ)
337 return -ENAMETOOLONG;
341 vport = vport_locate(devname);
347 dp_port = vport_get_dp_port(vport);
349 struct datapath *dp = dp_port->dp;
351 mutex_lock(&dp->mutex);
353 if (!strcmp(dp_name(dp), devname)) {
358 err = dp_detach_port(dp_port, 0);
361 mutex_unlock(&dp->mutex);
368 err = __vport_del(vport);
377 * vport_stats_get - retrieve device stats (for userspace callers)
379 * @ustats_req: Stats request parameters.
381 * Retrieves transmit, receive, and error stats for the given device. This
382 * function is for userspace callers and assumes no locks are held.
385 vport_stats_get(struct odp_vport_stats_req __user *ustats_req)
387 struct odp_vport_stats_req stats_req;
391 if (copy_from_user(&stats_req, ustats_req, sizeof(struct odp_vport_stats_req)))
394 stats_req.devname[IFNAMSIZ - 1] = '\0';
398 vport = vport_locate(stats_req.devname);
404 if (vport->ops->get_stats) {
406 err = vport->ops->get_stats(vport, &stats_req.stats);
409 } else if (vport->ops->flags & VPORT_F_GEN_STATS) {
412 memset(&stats_req.stats, 0, sizeof(struct odp_vport_stats));
414 for_each_possible_cpu(i) {
415 const struct vport_percpu_stats *percpu_stats;
417 percpu_stats = per_cpu_ptr(vport->percpu_stats, i);
418 stats_req.stats.rx_bytes += percpu_stats->rx_bytes;
419 stats_req.stats.rx_packets += percpu_stats->rx_packets;
420 stats_req.stats.tx_bytes += percpu_stats->tx_bytes;
421 stats_req.stats.tx_packets += percpu_stats->tx_packets;
424 spin_lock_bh(&vport->err_stats.lock);
426 stats_req.stats.rx_dropped = vport->err_stats.rx_dropped;
427 stats_req.stats.rx_errors = vport->err_stats.rx_errors
428 + vport->err_stats.rx_frame_err
429 + vport->err_stats.rx_over_err
430 + vport->err_stats.rx_crc_err;
431 stats_req.stats.rx_frame_err = vport->err_stats.rx_frame_err;
432 stats_req.stats.rx_over_err = vport->err_stats.rx_over_err;
433 stats_req.stats.rx_crc_err = vport->err_stats.rx_crc_err;
434 stats_req.stats.tx_dropped = vport->err_stats.tx_dropped;
435 stats_req.stats.tx_errors = vport->err_stats.tx_errors;
436 stats_req.stats.collisions = vport->err_stats.collisions;
438 spin_unlock_bh(&vport->err_stats.lock);
448 if (copy_to_user(ustats_req, &stats_req, sizeof(struct odp_vport_stats_req)))
455 * vport_ether_get - retrieve device Ethernet address (for userspace callers)
457 * @uvport_ether: Ethernet address request parameters.
459 * Retrieves the Ethernet address of the given device. This function is for
460 * userspace callers and assumes no locks are held.
463 vport_ether_get(struct odp_vport_ether __user *uvport_ether)
465 struct odp_vport_ether vport_ether;
469 if (copy_from_user(&vport_ether, uvport_ether, sizeof(struct odp_vport_ether)))
472 vport_ether.devname[IFNAMSIZ - 1] = '\0';
476 vport = vport_locate(vport_ether.devname);
483 memcpy(vport_ether.ether_addr, vport_get_addr(vport), ETH_ALEN);
490 if (copy_to_user(uvport_ether, &vport_ether, sizeof(struct odp_vport_ether)))
497 * vport_ether_set - set device Ethernet address (for userspace callers)
499 * @uvport_ether: Ethernet address request parameters.
501 * Sets the Ethernet address of the given device. Some devices may not support
502 * setting the Ethernet address, in which case the result will always be
503 * -EOPNOTSUPP. This function is for userspace callers and assumes no locks
507 vport_ether_set(struct odp_vport_ether __user *uvport_ether)
509 struct odp_vport_ether vport_ether;
513 if (copy_from_user(&vport_ether, uvport_ether, sizeof(struct odp_vport_ether)))
516 vport_ether.devname[IFNAMSIZ - 1] = '\0';
521 vport = vport_locate(vport_ether.devname);
527 err = vport_set_addr(vport, vport_ether.ether_addr);
536 * vport_mut_get - retrieve device MTU (for userspace callers)
538 * @uvport_mtu: MTU request parameters.
540 * Retrieves the MTU of the given device. This function is for userspace
541 * callers and assumes no locks are held.
544 vport_mtu_get(struct odp_vport_mtu __user *uvport_mtu)
546 struct odp_vport_mtu vport_mtu;
550 if (copy_from_user(&vport_mtu, uvport_mtu, sizeof(struct odp_vport_mtu)))
553 vport_mtu.devname[IFNAMSIZ - 1] = '\0';
557 vport = vport_locate(vport_mtu.devname);
563 vport_mtu.mtu = vport_get_mtu(vport);
569 if (copy_to_user(uvport_mtu, &vport_mtu, sizeof(struct odp_vport_mtu)))
576 * vport_mtu_set - set device MTU (for userspace callers)
578 * @uvport_mtu: MTU request parameters.
580 * Sets the MTU of the given device. Some devices may not support setting the
581 * MTU, in which case the result will always be -EOPNOTSUPP. This function is
582 * for userspace callers and assumes no locks are held.
585 vport_mtu_set(struct odp_vport_mtu __user *uvport_mtu)
587 struct odp_vport_mtu vport_mtu;
591 if (copy_from_user(&vport_mtu, uvport_mtu, sizeof(struct odp_vport_mtu)))
594 vport_mtu.devname[IFNAMSIZ - 1] = '\0';
599 vport = vport_locate(vport_mtu.devname);
605 err = vport_set_mtu(vport, vport_mtu.mtu);
613 static struct hlist_head *
614 hash_bucket(const char *name)
616 unsigned int hash = full_name_hash(name, strlen(name));
617 return &dev_table[hash & (VPORT_HASH_BUCKETS - 1)];
621 * vport_locate - find a port that has already been created
623 * @name: name of port to find
625 * Either RTNL or vport lock must be acquired before calling this function
626 * and held while using the found port. See the locking comments at the
630 vport_locate(const char *name)
632 struct hlist_head *bucket = hash_bucket(name);
634 struct hlist_node *node;
636 if (unlikely(!mutex_is_locked(&vport_mutex) && !rtnl_is_locked())) {
637 printk(KERN_ERR "openvswitch: neither RTNL nor vport lock held in vport_locate\n");
643 hlist_for_each_entry(vport, node, bucket, hash_node)
644 if (!strcmp(name, vport_get_name(vport)))
655 register_vport(struct vport *vport)
657 hlist_add_head(&vport->hash_node, hash_bucket(vport_get_name(vport)));
661 unregister_vport(struct vport *vport)
663 hlist_del(&vport->hash_node);
667 * vport_alloc - allocate and initialize new vport
669 * @priv_size: Size of private data area to allocate.
670 * @ops: vport device ops
672 * Allocate and initialize a new vport defined by @ops. The vport will contain
673 * a private data area of size @priv_size that can be accessed using
674 * vport_priv(). vports that are no longer needed should be released with
678 vport_alloc(int priv_size, const struct vport_ops *ops)
683 alloc_size = sizeof(struct vport);
685 alloc_size = ALIGN(alloc_size, VPORT_ALIGN);
686 alloc_size += priv_size;
689 vport = kzalloc(alloc_size, GFP_KERNEL);
691 return ERR_PTR(-ENOMEM);
695 if (vport->ops->flags & VPORT_F_GEN_STATS) {
696 vport->percpu_stats = alloc_percpu(struct vport_percpu_stats);
697 if (!vport->percpu_stats)
698 return ERR_PTR(-ENOMEM);
700 spin_lock_init(&vport->err_stats.lock);
707 * vport_free - uninitialize and free vport
709 * @vport: vport to free
711 * Frees a vport allocated with vport_alloc() when it is no longer needed.
714 vport_free(struct vport *vport)
716 if (vport->ops->flags & VPORT_F_GEN_STATS)
717 free_percpu(vport->percpu_stats);
723 * __vport_add - add vport device (for kernel callers)
725 * @name: Name of new device.
726 * @type: Type of new device (to be matched against types in registered vport
728 * @config: Device type specific configuration. Userspace pointer.
730 * Creates a new vport with the specified configuration (which is dependent
731 * on device type). Both RTNL and vport locks must be held.
734 __vport_add(const char *name, const char *type, const void __user *config)
743 for (i = 0; i < n_vport_types; i++) {
744 if (!strcmp(vport_ops_list[i]->type, type)) {
745 vport = vport_ops_list[i]->create(name, config);
747 err = PTR_ERR(vport);
751 register_vport(vport);
763 * __vport_mod - modify existing vport device (for kernel callers)
765 * @vport: vport to modify.
766 * @config: Device type specific configuration. Userspace pointer.
768 * Modifies an existing device with the specified configuration (which is
769 * dependent on device type). Both RTNL and vport locks must be held.
772 __vport_mod(struct vport *vport, const void __user *config)
777 if (vport->ops->modify)
778 return vport->ops->modify(vport, config);
784 * __vport_del - delete existing vport device (for kernel callers)
786 * @vport: vport to delete.
788 * Deletes the specified device. The device must not be currently attached to
789 * a datapath. It is possible to fail for reasons such as lack of memory.
790 * Both RTNL and vport locks must be held.
793 __vport_del(struct vport *vport)
797 BUG_ON(vport_get_dp_port(vport));
799 unregister_vport(vport);
801 return vport->ops->destroy(vport);
805 * vport_attach - attach a vport to a datapath
807 * @vport: vport to attach.
808 * @dp_port: Datapath port to attach the vport to.
810 * Attaches a vport to a specific datapath so that packets may be exchanged.
811 * Both ports must be currently unattached. @dp_port must be successfully
812 * attached to a vport before it is connected to a datapath and must not be
813 * modified while connected. RTNL lock and the appropriate DP mutex must be held.
816 vport_attach(struct vport *vport, struct dp_port *dp_port)
823 if (vport_get_dp_port(vport))
826 if (vport->ops->attach) {
829 err = vport->ops->attach(vport);
834 dp_port->vport = vport;
835 rcu_assign_pointer(vport->dp_port, dp_port);
841 * vport_detach - detach a vport from a datapath
843 * @vport: vport to detach.
845 * Detaches a vport from a datapath. May fail for a variety of reasons,
846 * including lack of memory. RTNL lock and the appropriate DP mutex must be held.
849 vport_detach(struct vport *vport)
851 struct dp_port *dp_port;
855 dp_port = vport_get_dp_port(vport);
859 dp_port->vport = NULL;
860 rcu_assign_pointer(vport->dp_port, NULL);
862 if (vport->ops->detach)
863 return vport->ops->detach(vport);
869 * vport_set_mtu - set device MTU (for kernel callers)
871 * @vport: vport on which to set MTU.
874 * Sets the MTU of the given device. Some devices may not support setting the
875 * MTU, in which case the result will always be -EOPNOTSUPP. RTNL lock must
879 vport_set_mtu(struct vport *vport, int mtu)
886 if (vport->ops->set_mtu) {
889 ret = vport->ops->set_mtu(vport, mtu);
891 if (!ret && !is_internal_vport(vport)) {
892 struct dp_port *dp_port = vport_get_dp_port(vport);
895 set_internal_devs_mtu(dp_port->dp);
904 * vport_set_addr - set device Ethernet address (for kernel callers)
906 * @vport: vport on which to set Ethernet address.
907 * @addr: New address.
909 * Sets the Ethernet address of the given device. Some devices may not support
910 * setting the Ethernet address, in which case the result will always be
911 * -EOPNOTSUPP. RTNL lock must be held.
914 vport_set_addr(struct vport *vport, const unsigned char *addr)
918 if (!is_valid_ether_addr(addr))
919 return -EADDRNOTAVAIL;
921 if (vport->ops->set_addr)
922 return vport->ops->set_addr(vport, addr);
928 * vport_get_name - retrieve device name
930 * @vport: vport from which to retrieve the name.
932 * Retrieves the name of the given device. Either RTNL lock or rcu_read_lock
933 * must be held for the entire duration that the name is in use.
936 vport_get_name(const struct vport *vport)
938 return vport->ops->get_name(vport);
942 * vport_get_type - retrieve device type
944 * @vport: vport from which to retrieve the type.
946 * Retrieves the type of the given device. Either RTNL lock or rcu_read_lock
947 * must be held for the entire duration that the type is in use.
950 vport_get_type(const struct vport *vport)
952 return vport->ops->type;
956 * vport_get_addr - retrieve device Ethernet address (for kernel callers)
958 * @vport: vport from which to retrieve the Ethernet address.
960 * Retrieves the Ethernet address of the given device. Either RTNL lock or
961 * rcu_read_lock must be held for the entire duration that the Ethernet address
964 const unsigned char *
965 vport_get_addr(const struct vport *vport)
967 return vport->ops->get_addr(vport);
971 * vport_get_dp_port - retrieve attached datapath port
973 * @vport: vport from which to retrieve the datapath port.
975 * Retrieves the attached datapath port or null if not attached. Either RTNL
976 * lock or rcu_read_lock must be held for the entire duration that the datapath
977 * port is being accessed.
980 vport_get_dp_port(const struct vport *vport)
982 return rcu_dereference(vport->dp_port);
986 * vport_get_kobj - retrieve associated kobj
988 * @vport: vport from which to retrieve the associated kobj
990 * Retrieves the associated kobj or null if no kobj. The returned kobj is
991 * valid for as long as the vport exists.
994 vport_get_kobj(const struct vport *vport)
996 if (vport->ops->get_kobj)
997 return vport->ops->get_kobj(vport);
1003 * vport_get_flags - retrieve device flags
1005 * @vport: vport from which to retrieve the flags
1007 * Retrieves the flags of the given device. Either RTNL lock or rcu_read_lock
1011 vport_get_flags(const struct vport *vport)
1013 return vport->ops->get_dev_flags(vport);
1017 * vport_get_flags - check whether device is running
1019 * @vport: vport on which to check status.
1021 * Checks whether the given device is running. Either RTNL lock or
1022 * rcu_read_lock must be held.
1025 vport_is_running(const struct vport *vport)
1027 return vport->ops->is_running(vport);
1031 * vport_get_flags - retrieve device operating state
1033 * @vport: vport from which to check status
1035 * Retrieves the RFC2863 operstate of the given device. Either RTNL lock or
1036 * rcu_read_lock must be held.
1039 vport_get_operstate(const struct vport *vport)
1041 return vport->ops->get_operstate(vport);
1045 * vport_get_ifindex - retrieve device system interface index
1047 * @vport: vport from which to retrieve index
1049 * Retrieves the system interface index of the given device. Not all devices
1050 * will have system indexes, in which case the index of the datapath local
1051 * port is returned. Returns a negative index on error. Either RTNL lock or
1052 * rcu_read_lock must be held.
1055 vport_get_ifindex(const struct vport *vport)
1057 const struct dp_port *dp_port;
1059 if (vport->ops->get_ifindex)
1060 return vport->ops->get_ifindex(vport);
1062 /* If we don't actually have an ifindex, use the local port's.
1063 * Userspace doesn't check it anyways. */
1064 dp_port = vport_get_dp_port(vport);
1068 return vport_get_ifindex(dp_port->dp->ports[ODPP_LOCAL]->vport);
1072 * vport_get_iflink - retrieve device system link index
1074 * @vport: vport from which to retrieve index
1076 * Retrieves the system link index of the given device. The link is the index
1077 * of the interface on which the packet will actually be sent. In most cases
1078 * this is the same as the ifindex but may be different for tunnel devices.
1079 * Returns a negative index on error. Either RTNL lock or rcu_read_lock must
1083 vport_get_iflink(const struct vport *vport)
1085 if (vport->ops->get_iflink)
1086 return vport->ops->get_iflink(vport);
1088 /* If we don't have an iflink, use the ifindex. In most cases they
1090 return vport_get_ifindex(vport);
1094 * vport_get_mtu - retrieve device MTU (for kernel callers)
1096 * @vport: vport from which to retrieve MTU
1098 * Retrieves the MTU of the given device. Either RTNL lock or rcu_read_lock
1102 vport_get_mtu(const struct vport *vport)
1104 return vport->ops->get_mtu(vport);
1108 * vport_receive - pass up received packet to the datapath for processing
1110 * @vport: vport that received the packet
1111 * @skb: skb that was received
1113 * Must be called with rcu_read_lock. The packet cannot be shared and
1114 * skb->data should point to the Ethernet header. The caller must have already
1115 * called compute_ip_summed() to initialize the checksumming fields.
1118 vport_receive(struct vport *vport, struct sk_buff *skb)
1120 struct dp_port *dp_port = vport_get_dp_port(vport);
1123 vport_record_error(vport, VPORT_E_RX_DROPPED);
1129 if (vport->ops->flags & VPORT_F_GEN_STATS) {
1130 struct vport_percpu_stats *stats;
1134 stats = per_cpu_ptr(vport->percpu_stats, smp_processor_id());
1135 stats->rx_packets++;
1136 stats->rx_bytes += skb->len;
1141 if (!(vport->ops->flags & VPORT_F_TUN_ID))
1142 OVS_CB(skb)->tun_id = 0;
1144 dp_process_received_packet(dp_port, skb);
1148 * vport_send - send a packet on a device
1150 * @vport: vport on which to send the packet
1153 * Sends the given packet and returns the length of data sent. Either RTNL
1154 * lock or rcu_read_lock must be held.
1157 vport_send(struct vport *vport, struct sk_buff *skb)
1161 sent = vport->ops->send(vport, skb);
1163 if (vport->ops->flags & VPORT_F_GEN_STATS && sent > 0) {
1164 struct vport_percpu_stats *stats;
1168 stats = per_cpu_ptr(vport->percpu_stats, smp_processor_id());
1169 stats->tx_packets++;
1170 stats->tx_bytes += sent;
1179 * vport_record_error - indicate device error to generic stats layer
1181 * @vport: vport that encountered the error
1182 * @err_type: one of enum vport_err_type types to indicate the error type
1184 * If using the vport generic stats layer indicate that an error of the given
1188 vport_record_error(struct vport *vport, enum vport_err_type err_type)
1190 if (vport->ops->flags & VPORT_F_GEN_STATS) {
1192 spin_lock_bh(&vport->err_stats.lock);
1195 case VPORT_E_RX_DROPPED:
1196 vport->err_stats.rx_dropped++;
1199 case VPORT_E_RX_ERROR:
1200 vport->err_stats.rx_errors++;
1203 case VPORT_E_RX_FRAME:
1204 vport->err_stats.rx_frame_err++;
1207 case VPORT_E_RX_OVER:
1208 vport->err_stats.rx_over_err++;
1211 case VPORT_E_RX_CRC:
1212 vport->err_stats.rx_crc_err++;
1215 case VPORT_E_TX_DROPPED:
1216 vport->err_stats.tx_dropped++;
1219 case VPORT_E_TX_ERROR:
1220 vport->err_stats.tx_errors++;
1223 case VPORT_E_COLLISION:
1224 vport->err_stats.collisions++;
1228 spin_unlock_bh(&vport->err_stats.lock);