diff options
Diffstat (limited to 'net/openvswitch/vport.c')
| -rw-r--r-- | net/openvswitch/vport.c | 118 |
1 files changed, 89 insertions, 29 deletions
diff --git a/net/openvswitch/vport.c b/net/openvswitch/vport.c index 19f6765566e7..6bbbc16ab778 100644 --- a/net/openvswitch/vport.c +++ b/net/openvswitch/vport.c @@ -1,19 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2007-2014 Nicira, Inc. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of version 2 of the GNU General Public - * License as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA */ #include <linux/etherdevice.h> @@ -100,6 +87,7 @@ EXPORT_SYMBOL_GPL(ovs_vport_ops_unregister); /** * ovs_vport_locate - find a port that has already been created * + * @net: network namespace * @name: name of port to find * * Must be called with ovs or RCU read lock. @@ -109,7 +97,8 @@ struct vport *ovs_vport_locate(const struct net *net, const char *name) struct hlist_head *bucket = hash_bucket(net, name); struct vport *vport; - hlist_for_each_entry_rcu(vport, bucket, hash_node) + hlist_for_each_entry_rcu(vport, bucket, hash_node, + lockdep_ovsl_is_held()) if (!strcmp(name, ovs_vport_name(vport)) && net_eq(ovs_dp_get_net(vport->dp), net)) return vport; @@ -122,17 +111,20 @@ struct vport *ovs_vport_locate(const struct net *net, const char *name) * * @priv_size: Size of private data area to allocate. * @ops: vport device ops + * @parms: information about new vport. * * Allocate and initialize a new vport defined by @ops. The vport will contain * a private data area of size @priv_size that can be accessed using - * vport_priv(). vports that are no longer needed should be released with + * vport_priv(). Some parameters of the vport will be initialized from @parms. + * @vports that are no longer needed should be released with * vport_free(). */ struct vport *ovs_vport_alloc(int priv_size, const struct vport_ops *ops, - const struct vport_parms *parms) + const struct vport_parms *parms) { struct vport *vport; size_t alloc_size; + int err; alloc_size = sizeof(struct vport); if (priv_size) { @@ -144,17 +136,29 @@ struct vport *ovs_vport_alloc(int priv_size, const struct vport_ops *ops, if (!vport) return ERR_PTR(-ENOMEM); + vport->upcall_stats = netdev_alloc_pcpu_stats(struct vport_upcall_stats_percpu); + if (!vport->upcall_stats) { + err = -ENOMEM; + goto err_kfree_vport; + } + vport->dp = parms->dp; vport->port_no = parms->port_no; vport->ops = ops; INIT_HLIST_NODE(&vport->dp_hash_node); if (ovs_vport_set_upcall_portids(vport, parms->upcall_portids)) { - kfree(vport); - return ERR_PTR(-EINVAL); + err = -EINVAL; + goto err_free_percpu; } return vport; + +err_free_percpu: + free_percpu(vport->upcall_stats); +err_kfree_vport: + kfree(vport); + return ERR_PTR(err); } EXPORT_SYMBOL_GPL(ovs_vport_alloc); @@ -174,6 +178,7 @@ void ovs_vport_free(struct vport *vport) * it is safe to use raw dereference. */ kfree(rcu_dereference_raw(vport->upcall_portids)); + free_percpu(vport->upcall_stats); kfree(vport); } EXPORT_SYMBOL_GPL(ovs_vport_free); @@ -261,8 +266,6 @@ int ovs_vport_set_options(struct vport *vport, struct nlattr *options) */ void ovs_vport_del(struct vport *vport) { - ASSERT_OVSL(); - hlist_del_rcu(&vport->hash_node); module_put(vport->ops->owner); vport->ops->destroy(vport); @@ -296,6 +299,56 @@ void ovs_vport_get_stats(struct vport *vport, struct ovs_vport_stats *stats) } /** + * ovs_vport_get_upcall_stats - retrieve upcall stats + * + * @vport: vport from which to retrieve the stats. + * @skb: sk_buff where upcall stats should be appended. + * + * Retrieves upcall stats for the given device. + * + * Must be called with ovs_mutex or rcu_read_lock. + */ +int ovs_vport_get_upcall_stats(struct vport *vport, struct sk_buff *skb) +{ + struct nlattr *nla; + int i; + + __u64 tx_success = 0; + __u64 tx_fail = 0; + + for_each_possible_cpu(i) { + const struct vport_upcall_stats_percpu *stats; + unsigned int start; + + stats = per_cpu_ptr(vport->upcall_stats, i); + do { + start = u64_stats_fetch_begin(&stats->syncp); + tx_success += u64_stats_read(&stats->n_success); + tx_fail += u64_stats_read(&stats->n_fail); + } while (u64_stats_fetch_retry(&stats->syncp, start)); + } + + nla = nla_nest_start_noflag(skb, OVS_VPORT_ATTR_UPCALL_STATS); + if (!nla) + return -EMSGSIZE; + + if (nla_put_u64_64bit(skb, OVS_VPORT_UPCALL_ATTR_SUCCESS, tx_success, + OVS_VPORT_ATTR_PAD)) { + nla_nest_cancel(skb, nla); + return -EMSGSIZE; + } + + if (nla_put_u64_64bit(skb, OVS_VPORT_UPCALL_ATTR_FAIL, tx_fail, + OVS_VPORT_ATTR_PAD)) { + nla_nest_cancel(skb, nla); + return -EMSGSIZE; + } + nla_nest_end(skb, nla); + + return 0; +} + +/** * ovs_vport_get_options - retrieve device options * * @vport: vport from which to retrieve the options. @@ -319,7 +372,7 @@ int ovs_vport_get_options(const struct vport *vport, struct sk_buff *skb) if (!vport->ops->get_options) return 0; - nla = nla_nest_start(skb, OVS_VPORT_ATTR_OPTIONS); + nla = nla_nest_start_noflag(skb, OVS_VPORT_ATTR_OPTIONS); if (!nla) return -EMSGSIZE; @@ -410,7 +463,8 @@ int ovs_vport_get_upcall_portids(const struct vport *vport, * * Returns the portid of the target socket. Must be called with rcu_read_lock. */ -u32 ovs_vport_find_upcall_portid(const struct vport *vport, struct sk_buff *skb) +u32 ovs_vport_find_upcall_portid(const struct vport *vport, + struct sk_buff *skb) { struct vport_portids *ids; u32 ids_index; @@ -418,8 +472,9 @@ u32 ovs_vport_find_upcall_portid(const struct vport *vport, struct sk_buff *skb) ids = rcu_dereference(vport->upcall_portids); - if (ids->n_ids == 1 && ids->ids[0] == 0) - return 0; + /* If there is only one portid, select it in the fast-path. */ + if (ids->n_ids == 1) + return ids->ids[0]; hash = skb_get_hash(skb); ids_index = hash - ids->n_ids * reciprocal_divide(hash, ids->rn_ids); @@ -431,7 +486,7 @@ u32 ovs_vport_find_upcall_portid(const struct vport *vport, struct sk_buff *skb) * * @vport: vport that received the packet * @skb: skb that was received - * @tun_key: tunnel (if any) that carried packet + * @tun_info: tunnel (if any) that carried packet * * Must be called with rcu_read_lock. The packet cannot be shared and * skb->data should point to the Ethernet header. @@ -445,6 +500,8 @@ int ovs_vport_receive(struct vport *vport, struct sk_buff *skb, OVS_CB(skb)->input_vport = vport; OVS_CB(skb)->mru = 0; OVS_CB(skb)->cutlen = 0; + OVS_CB(skb)->probability = 0; + OVS_CB(skb)->upcall_pid = 0; if (unlikely(dev_net(skb->dev) != ovs_dp_get_net(vport->dp))) { u32 mark; @@ -506,14 +563,17 @@ void ovs_vport_send(struct vport *vport, struct sk_buff *skb, u8 mac_proto) if (unlikely(packet_length(skb, vport->dev) > mtu && !skb_is_gso(skb))) { - net_warn_ratelimited("%s: dropped over-mtu packet: %d > %d\n", - vport->dev->name, - packet_length(skb, vport->dev), mtu); vport->dev->stats.tx_errors++; + if (vport->dev->flags & IFF_UP) + net_warn_ratelimited("%s: dropped over-mtu packet: " + "%d > %d\n", vport->dev->name, + packet_length(skb, vport->dev), + mtu); goto drop; } skb->dev = vport->dev; + skb_clear_tstamp(skb); vport->ops->send(skb); return; |