/* * Copyright (c) 2014 Nicira, Inc. * Copyright (c) 2013 Cisco Systems, 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 #include #include #include #include #include #include #include #include "datapath.h" #include "vport.h" #include "vport-netdev.h" static struct vport_ops ovs_vxlan_netdev_vport_ops; static int vxlan_get_options(const struct vport *vport, struct sk_buff *skb) { struct vxlan_dev *vxlan = netdev_priv(vport->dev); __be16 dst_port = vxlan->cfg.dst_port; if (nla_put_u16(skb, OVS_TUNNEL_ATTR_DST_PORT, ntohs(dst_port))) return -EMSGSIZE; if (vxlan->flags & VXLAN_F_GBP) { struct nlattr *exts; exts = nla_nest_start(skb, OVS_TUNNEL_ATTR_EXTENSION); if (!exts) return -EMSGSIZE; if (vxlan->flags & VXLAN_F_GBP && nla_put_flag(skb, OVS_VXLAN_EXT_GBP)) return -EMSGSIZE; nla_nest_end(skb, exts); } return 0; } static const struct nla_policy exts_policy[OVS_VXLAN_EXT_MAX + 1] = { [OVS_VXLAN_EXT_GBP] = { .type = NLA_FLAG, }, }; static int vxlan_configure_exts(struct vport *vport, struct nlattr *attr, struct vxlan_config *conf) { struct nlattr *exts[OVS_VXLAN_EXT_MAX + 1]; int err; if (nla_len(attr) < sizeof(struct nlattr)) return -EINVAL; err = nla_parse_nested(exts, OVS_VXLAN_EXT_MAX, attr, exts_policy); if (err < 0) return err; if (exts[OVS_VXLAN_EXT_GBP]) conf->flags |= VXLAN_F_GBP; return 0; } static struct vport *vxlan_tnl_create(const struct vport_parms *parms) { struct net *net = ovs_dp_get_net(parms->dp); struct nlattr *options = parms->options; struct net_device *dev; struct vport *vport; struct nlattr *a; int err; struct vxlan_config conf = { .no_share = true, .flags = VXLAN_F_COLLECT_METADATA | VXLAN_F_UDP_ZERO_CSUM6_RX, /* Don't restrict the packets that can be sent by MTU */ .mtu = IP_MAX_MTU, }; if (!options) { err = -EINVAL; goto error; } a = nla_find_nested(options, OVS_TUNNEL_ATTR_DST_PORT); if (a && nla_len(a) == sizeof(u16)) { conf.dst_port = htons(nla_get_u16(a)); } else { /* Require destination port from userspace. */ err = -EINVAL; goto error; } vport = ovs_vport_alloc(0, &ovs_vxlan_netdev_vport_ops, parms); if (IS_ERR(vport)) return vport; a = nla_find_nested(options, OVS_TUNNEL_ATTR_EXTENSION); if (a) { err = vxlan_configure_exts(vport, a, &conf); if (err) { ovs_vport_free(vport); goto error; } } rtnl_lock(); dev = vxlan_dev_create(net, parms->name, NET_NAME_USER, &conf); if (IS_ERR(dev)) { rtnl_unlock(); ovs_vport_free(vport); return ERR_CAST(dev); } err = dev_change_flags(dev, dev->flags | IFF_UP); if (err < 0) { rtnl_delete_link(dev); rtnl_unlock(); ovs_vport_free(vport); goto error; } rtnl_unlock(); return vport; error: return ERR_PTR(err); } static struct vport *vxlan_create(const struct vport_parms *parms) { struct vport *vport; vport = vxlan_tnl_create(parms); if (IS_ERR(vport)) return vport; return ovs_netdev_link(vport, parms->name); } static struct vport_ops ovs_vxlan_netdev_vport_ops = { .type = OVS_VPORT_TYPE_VXLAN, .create = vxlan_create, .destroy = ovs_netdev_tunnel_destroy, .get_options = vxlan_get_options, .send = dev_queue_xmit, }; static int __init ovs_vxlan_tnl_init(void) { return ovs_vport_ops_register(&ovs_vxlan_netdev_vport_ops); } static void __exit ovs_vxlan_tnl_exit(void) { ovs_vport_ops_unregister(&ovs_vxlan_netdev_vport_ops); } module_init(ovs_vxlan_tnl_init); module_exit(ovs_vxlan_tnl_exit); MODULE_DESCRIPTION("OVS: VXLAN switching port"); MODULE_LICENSE("GPL"); MODULE_ALIAS("vport-type-4"); ion>space:mode:
authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2017-02-03 17:10:28 +1100
committerMichael Ellerman <mpe@ellerman.id.au>2017-02-08 23:36:29 +1100
commitd7df2443cd5f67fc6ee7c05a88e4996e8177f91b (patch)
tree098a7c0ca4fceb8a65cb1f693c9d71990388933d /include/net/irda/irlap.h
parenta0615a16f7d0ceb5804d295203c302d496d8ee91 (diff)
powerpc/mm: Fix spurrious segfaults on radix with autonuma
When autonuma (Automatic NUMA balancing) marks a PTE inaccessible it clears all the protection bits but leave the PTE valid. With the Radix MMU, an attempt at executing from such a PTE will take a fault with bit 35 of SRR1 set "SRR1_ISI_N_OR_G". It is thus incorrect to treat all such faults as errors. We should pass them to handle_mm_fault() for autonuma to deal with. The case of pages that are really not executable is handled by the existing test for VM_EXEC further down. That leaves us with catching the kernel attempts at executing user pages. We can catch that earlier, even before we do find_vma. It is never valid on powerpc for the kernel to take an exec fault to begin with. So fold that test with the existing test for the kernel faulting on kernel addresses to bail out early. Fixes: 1d18ad026844 ("powerpc/mm: Detect instruction fetch denied and report") Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Acked-by: Balbir Singh <bsingharora@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'include/net/irda/irlap.h')