From 15e473046cb6e5d18a4d0057e61d76315230382b Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Fri, 7 Sep 2012 20:12:54 +0000 Subject: netlink: Rename pid to portid to avoid confusion It is a frequent mistake to confuse the netlink port identifier with a process identifier. Try to reduce this confusion by renaming fields that hold port identifiers portid instead of pid. I have carefully avoided changing the structures exported to userspace to avoid changing the userspace API. I have successfully built an allyesconfig kernel with this change. Signed-off-by: "Eric W. Biederman" Acked-by: Stephen Hemminger Signed-off-by: David S. Miller --- net/openvswitch/actions.c | 4 +-- net/openvswitch/datapath.c | 84 +++++++++++++++++++++++----------------------- net/openvswitch/datapath.h | 2 +- net/openvswitch/vport.c | 2 +- net/openvswitch/vport.h | 6 ++-- 5 files changed, 49 insertions(+), 49 deletions(-) (limited to 'net/openvswitch') diff --git a/net/openvswitch/actions.c b/net/openvswitch/actions.c index 0da687769f56..c7425f32e7db 100644 --- a/net/openvswitch/actions.c +++ b/net/openvswitch/actions.c @@ -286,7 +286,7 @@ static int output_userspace(struct datapath *dp, struct sk_buff *skb, upcall.cmd = OVS_PACKET_CMD_ACTION; upcall.key = &OVS_CB(skb)->flow->key; upcall.userdata = NULL; - upcall.pid = 0; + upcall.portid = 0; for (a = nla_data(attr), rem = nla_len(attr); rem > 0; a = nla_next(a, &rem)) { @@ -296,7 +296,7 @@ static int output_userspace(struct datapath *dp, struct sk_buff *skb, break; case OVS_USERSPACE_ATTR_PID: - upcall.pid = nla_get_u32(a); + upcall.portid = nla_get_u32(a); break; } } diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c index 105a0b5adc51..56327e877ed9 100644 --- a/net/openvswitch/datapath.c +++ b/net/openvswitch/datapath.c @@ -225,7 +225,7 @@ void ovs_dp_process_received_packet(struct vport *p, struct sk_buff *skb) upcall.cmd = OVS_PACKET_CMD_MISS; upcall.key = &key; upcall.userdata = NULL; - upcall.pid = p->upcall_pid; + upcall.portid = p->upcall_portid; ovs_dp_upcall(dp, skb, &upcall); consume_skb(skb); stats_counter = &stats->n_missed; @@ -261,7 +261,7 @@ int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, int dp_ifindex; int err; - if (upcall_info->pid == 0) { + if (upcall_info->portid == 0) { err = -ENOTCONN; goto err; } @@ -395,7 +395,7 @@ static int queue_userspace_packet(struct net *net, int dp_ifindex, skb_copy_and_csum_dev(skb, nla_data(nla)); - err = genlmsg_unicast(net, user_skb, upcall_info->pid); + err = genlmsg_unicast(net, user_skb, upcall_info->portid); out: kfree_skb(nskb); @@ -780,7 +780,7 @@ static struct genl_multicast_group ovs_dp_flow_multicast_group = { /* Called with genl_lock. */ static int ovs_flow_cmd_fill_info(struct sw_flow *flow, struct datapath *dp, - struct sk_buff *skb, u32 pid, + struct sk_buff *skb, u32 portid, u32 seq, u32 flags, u8 cmd) { const int skb_orig_len = skb->len; @@ -795,7 +795,7 @@ static int ovs_flow_cmd_fill_info(struct sw_flow *flow, struct datapath *dp, sf_acts = rcu_dereference_protected(flow->sf_acts, lockdep_genl_is_held()); - ovs_header = genlmsg_put(skb, pid, seq, &dp_flow_genl_family, flags, cmd); + ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, flags, cmd); if (!ovs_header) return -EMSGSIZE; @@ -879,7 +879,7 @@ static struct sk_buff *ovs_flow_cmd_alloc_info(struct sw_flow *flow) static struct sk_buff *ovs_flow_cmd_build_info(struct sw_flow *flow, struct datapath *dp, - u32 pid, u32 seq, u8 cmd) + u32 portid, u32 seq, u8 cmd) { struct sk_buff *skb; int retval; @@ -888,7 +888,7 @@ static struct sk_buff *ovs_flow_cmd_build_info(struct sw_flow *flow, if (!skb) return ERR_PTR(-ENOMEM); - retval = ovs_flow_cmd_fill_info(flow, dp, skb, pid, seq, 0, cmd); + retval = ovs_flow_cmd_fill_info(flow, dp, skb, portid, seq, 0, cmd); BUG_ON(retval < 0); return skb; } @@ -970,7 +970,7 @@ static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info) flow->hash = ovs_flow_hash(&key, key_len); ovs_flow_tbl_insert(table, flow); - reply = ovs_flow_cmd_build_info(flow, dp, info->snd_pid, + reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid, info->snd_seq, OVS_FLOW_CMD_NEW); } else { @@ -1008,7 +1008,7 @@ static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info) ovs_flow_deferred_free_acts(old_acts); } - reply = ovs_flow_cmd_build_info(flow, dp, info->snd_pid, + reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid, info->snd_seq, OVS_FLOW_CMD_NEW); /* Clear stats. */ @@ -1020,7 +1020,7 @@ static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info) } if (!IS_ERR(reply)) - genl_notify(reply, genl_info_net(info), info->snd_pid, + genl_notify(reply, genl_info_net(info), info->snd_portid, ovs_dp_flow_multicast_group.id, info->nlhdr, GFP_KERNEL); else @@ -1061,7 +1061,7 @@ static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) if (!flow) return -ENOENT; - reply = ovs_flow_cmd_build_info(flow, dp, info->snd_pid, + reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid, info->snd_seq, OVS_FLOW_CMD_NEW); if (IS_ERR(reply)) return PTR_ERR(reply); @@ -1103,13 +1103,13 @@ static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) ovs_flow_tbl_remove(table, flow); - err = ovs_flow_cmd_fill_info(flow, dp, reply, info->snd_pid, + err = ovs_flow_cmd_fill_info(flow, dp, reply, info->snd_portid, info->snd_seq, 0, OVS_FLOW_CMD_DEL); BUG_ON(err < 0); ovs_flow_deferred_free(flow); - genl_notify(reply, genl_info_net(info), info->snd_pid, + genl_notify(reply, genl_info_net(info), info->snd_portid, ovs_dp_flow_multicast_group.id, info->nlhdr, GFP_KERNEL); return 0; } @@ -1137,7 +1137,7 @@ static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) break; if (ovs_flow_cmd_fill_info(flow, dp, skb, - NETLINK_CB(cb->skb).pid, + NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, NLM_F_MULTI, OVS_FLOW_CMD_NEW) < 0) break; @@ -1191,13 +1191,13 @@ static struct genl_multicast_group ovs_dp_datapath_multicast_group = { }; static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, - u32 pid, u32 seq, u32 flags, u8 cmd) + u32 portid, u32 seq, u32 flags, u8 cmd) { struct ovs_header *ovs_header; struct ovs_dp_stats dp_stats; int err; - ovs_header = genlmsg_put(skb, pid, seq, &dp_datapath_genl_family, + ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, flags, cmd); if (!ovs_header) goto error; @@ -1222,7 +1222,7 @@ error: return -EMSGSIZE; } -static struct sk_buff *ovs_dp_cmd_build_info(struct datapath *dp, u32 pid, +static struct sk_buff *ovs_dp_cmd_build_info(struct datapath *dp, u32 portid, u32 seq, u8 cmd) { struct sk_buff *skb; @@ -1232,7 +1232,7 @@ static struct sk_buff *ovs_dp_cmd_build_info(struct datapath *dp, u32 pid, if (!skb) return ERR_PTR(-ENOMEM); - retval = ovs_dp_cmd_fill_info(dp, skb, pid, seq, 0, cmd); + retval = ovs_dp_cmd_fill_info(dp, skb, portid, seq, 0, cmd); if (retval < 0) { kfree_skb(skb); return ERR_PTR(retval); @@ -1311,7 +1311,7 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) parms.options = NULL; parms.dp = dp; parms.port_no = OVSP_LOCAL; - parms.upcall_pid = nla_get_u32(a[OVS_DP_ATTR_UPCALL_PID]); + parms.upcall_portid = nla_get_u32(a[OVS_DP_ATTR_UPCALL_PID]); vport = new_vport(&parms); if (IS_ERR(vport)) { @@ -1322,7 +1322,7 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) goto err_destroy_ports_array; } - reply = ovs_dp_cmd_build_info(dp, info->snd_pid, + reply = ovs_dp_cmd_build_info(dp, info->snd_portid, info->snd_seq, OVS_DP_CMD_NEW); err = PTR_ERR(reply); if (IS_ERR(reply)) @@ -1332,7 +1332,7 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) list_add_tail(&dp->list_node, &ovs_net->dps); rtnl_unlock(); - genl_notify(reply, genl_info_net(info), info->snd_pid, + genl_notify(reply, genl_info_net(info), info->snd_portid, ovs_dp_datapath_multicast_group.id, info->nlhdr, GFP_KERNEL); return 0; @@ -1394,7 +1394,7 @@ static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) if (IS_ERR(dp)) return err; - reply = ovs_dp_cmd_build_info(dp, info->snd_pid, + reply = ovs_dp_cmd_build_info(dp, info->snd_portid, info->snd_seq, OVS_DP_CMD_DEL); err = PTR_ERR(reply); if (IS_ERR(reply)) @@ -1402,7 +1402,7 @@ static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) __dp_destroy(dp); - genl_notify(reply, genl_info_net(info), info->snd_pid, + genl_notify(reply, genl_info_net(info), info->snd_portid, ovs_dp_datapath_multicast_group.id, info->nlhdr, GFP_KERNEL); @@ -1419,7 +1419,7 @@ static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) if (IS_ERR(dp)) return PTR_ERR(dp); - reply = ovs_dp_cmd_build_info(dp, info->snd_pid, + reply = ovs_dp_cmd_build_info(dp, info->snd_portid, info->snd_seq, OVS_DP_CMD_NEW); if (IS_ERR(reply)) { err = PTR_ERR(reply); @@ -1428,7 +1428,7 @@ static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) return 0; } - genl_notify(reply, genl_info_net(info), info->snd_pid, + genl_notify(reply, genl_info_net(info), info->snd_portid, ovs_dp_datapath_multicast_group.id, info->nlhdr, GFP_KERNEL); @@ -1444,7 +1444,7 @@ static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) if (IS_ERR(dp)) return PTR_ERR(dp); - reply = ovs_dp_cmd_build_info(dp, info->snd_pid, + reply = ovs_dp_cmd_build_info(dp, info->snd_portid, info->snd_seq, OVS_DP_CMD_NEW); if (IS_ERR(reply)) return PTR_ERR(reply); @@ -1461,7 +1461,7 @@ static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) list_for_each_entry(dp, &ovs_net->dps, list_node) { if (i >= skip && - ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).pid, + ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, NLM_F_MULTI, OVS_DP_CMD_NEW) < 0) break; @@ -1521,13 +1521,13 @@ struct genl_multicast_group ovs_dp_vport_multicast_group = { /* Called with RTNL lock or RCU read lock. */ static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, - u32 pid, u32 seq, u32 flags, u8 cmd) + u32 portid, u32 seq, u32 flags, u8 cmd) { struct ovs_header *ovs_header; struct ovs_vport_stats vport_stats; int err; - ovs_header = genlmsg_put(skb, pid, seq, &dp_vport_genl_family, + ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, flags, cmd); if (!ovs_header) return -EMSGSIZE; @@ -1537,7 +1537,7 @@ static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || nla_put_string(skb, OVS_VPORT_ATTR_NAME, vport->ops->get_name(vport)) || - nla_put_u32(skb, OVS_VPORT_ATTR_UPCALL_PID, vport->upcall_pid)) + nla_put_u32(skb, OVS_VPORT_ATTR_UPCALL_PID, vport->upcall_portid)) goto nla_put_failure; ovs_vport_get_stats(vport, &vport_stats); @@ -1559,7 +1559,7 @@ error: } /* Called with RTNL lock or RCU read lock. */ -struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 pid, +struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid, u32 seq, u8 cmd) { struct sk_buff *skb; @@ -1569,7 +1569,7 @@ struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 pid, if (!skb) return ERR_PTR(-ENOMEM); - retval = ovs_vport_cmd_fill_info(vport, skb, pid, seq, 0, cmd); + retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd); if (retval < 0) { kfree_skb(skb); return ERR_PTR(retval); @@ -1661,21 +1661,21 @@ static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) parms.options = a[OVS_VPORT_ATTR_OPTIONS]; parms.dp = dp; parms.port_no = port_no; - parms.upcall_pid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]); + parms.upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]); vport = new_vport(&parms); err = PTR_ERR(vport); if (IS_ERR(vport)) goto exit_unlock; - reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq, + reply = ovs_vport_cmd_build_info(vport, info->snd_portid, info->snd_seq, OVS_VPORT_CMD_NEW); if (IS_ERR(reply)) { err = PTR_ERR(reply); ovs_dp_detach_port(vport); goto exit_unlock; } - genl_notify(reply, genl_info_net(info), info->snd_pid, + genl_notify(reply, genl_info_net(info), info->snd_portid, ovs_dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL); exit_unlock: @@ -1707,9 +1707,9 @@ static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) if (err) goto exit_unlock; if (a[OVS_VPORT_ATTR_UPCALL_PID]) - vport->upcall_pid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]); + vport->upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]); - reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq, + reply = ovs_vport_cmd_build_info(vport, info->snd_portid, info->snd_seq, OVS_VPORT_CMD_NEW); if (IS_ERR(reply)) { netlink_set_err(sock_net(skb->sk)->genl_sock, 0, @@ -1717,7 +1717,7 @@ static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) goto exit_unlock; } - genl_notify(reply, genl_info_net(info), info->snd_pid, + genl_notify(reply, genl_info_net(info), info->snd_portid, ovs_dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL); exit_unlock: @@ -1743,7 +1743,7 @@ static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) goto exit_unlock; } - reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq, + reply = ovs_vport_cmd_build_info(vport, info->snd_portid, info->snd_seq, OVS_VPORT_CMD_DEL); err = PTR_ERR(reply); if (IS_ERR(reply)) @@ -1751,7 +1751,7 @@ static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) ovs_dp_detach_port(vport); - genl_notify(reply, genl_info_net(info), info->snd_pid, + genl_notify(reply, genl_info_net(info), info->snd_portid, ovs_dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL); exit_unlock: @@ -1773,7 +1773,7 @@ static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) if (IS_ERR(vport)) goto exit_unlock; - reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq, + reply = ovs_vport_cmd_build_info(vport, info->snd_portid, info->snd_seq, OVS_VPORT_CMD_NEW); err = PTR_ERR(reply); if (IS_ERR(reply)) @@ -1808,7 +1808,7 @@ static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) hlist_for_each_entry_rcu(vport, n, &dp->ports[i], dp_hash_node) { if (j >= skip && ovs_vport_cmd_fill_info(vport, skb, - NETLINK_CB(cb->skb).pid, + NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, NLM_F_MULTI, OVS_VPORT_CMD_NEW) < 0) diff --git a/net/openvswitch/datapath.h b/net/openvswitch/datapath.h index 129ec5480758..031dfbf37c93 100644 --- a/net/openvswitch/datapath.h +++ b/net/openvswitch/datapath.h @@ -129,7 +129,7 @@ struct dp_upcall_info { u8 cmd; const struct sw_flow_key *key; const struct nlattr *userdata; - u32 pid; + u32 portid; }; static inline struct net *ovs_dp_get_net(struct datapath *dp) diff --git a/net/openvswitch/vport.c b/net/openvswitch/vport.c index 1abd9609ba78..9055dd698c70 100644 --- a/net/openvswitch/vport.c +++ b/net/openvswitch/vport.c @@ -125,7 +125,7 @@ struct vport *ovs_vport_alloc(int priv_size, const struct vport_ops *ops, vport->dp = parms->dp; vport->port_no = parms->port_no; - vport->upcall_pid = parms->upcall_pid; + vport->upcall_portid = parms->upcall_portid; vport->ops = ops; INIT_HLIST_NODE(&vport->dp_hash_node); diff --git a/net/openvswitch/vport.h b/net/openvswitch/vport.h index c56e4836e93b..3f7961ea3c56 100644 --- a/net/openvswitch/vport.h +++ b/net/openvswitch/vport.h @@ -70,7 +70,7 @@ struct vport_err_stats { * @rcu: RCU callback head for deferred destruction. * @port_no: Index into @dp's @ports array. * @dp: Datapath to which this port belongs. - * @upcall_pid: The Netlink port to use for packets received on this port that + * @upcall_portid: The Netlink port to use for packets received on this port that * miss the flow table. * @hash_node: Element in @dev_table hash table in vport.c. * @dp_hash_node: Element in @datapath->ports hash table in datapath.c. @@ -83,7 +83,7 @@ struct vport { struct rcu_head rcu; u16 port_no; struct datapath *dp; - u32 upcall_pid; + u32 upcall_portid; struct hlist_node hash_node; struct hlist_node dp_hash_node; @@ -113,7 +113,7 @@ struct vport_parms { /* For ovs_vport_alloc(). */ struct datapath *dp; u16 port_no; - u32 upcall_pid; + u32 upcall_portid; }; /** -- cgit v1.2.3