diff options
Diffstat (limited to 'utils/extras/devices/rtnetlink/netns.c')
| -rw-r--r-- | utils/extras/devices/rtnetlink/netns.c | 787 |
1 files changed, 787 insertions, 0 deletions
diff --git a/utils/extras/devices/rtnetlink/netns.c b/utils/extras/devices/rtnetlink/netns.c new file mode 100644 index 000000000..19adb469a --- /dev/null +++ b/utils/extras/devices/rtnetlink/netns.c @@ -0,0 +1,787 @@ +/* + * Copyright (c) 2016-2019 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + + +#include <vlib/vlib.h> +#include <vlib/unix/unix.h> +#include <vnet/ethernet/ethernet.h> +#include <vnet/ip/ip4_packet.h> +#include <vnet/ip/ip6_packet.h> +#include <vnet/ip/format.h> +#include <stddef.h> + +#include "netns.h" + +/* Enable some RTA values debug */ +//#define RTNL_CHECK + +#define is_nonzero(x) \ + ({ \ + u8 __is_zero_zero[sizeof(x)] = {}; \ + memcmp(__is_zero_zero, &x, sizeof(x)); \ + }) + +typedef struct { + u8 type; //Attribute identifier + u8 unique; //Part of the values uniquely identifying an entry + u16 offset; //Offset where stored in struct + u16 size; //Length of the attribute +} rtnl_mapping_t; + +#define ns_foreach_ifla \ + _(IFLA_ADDRESS, hwaddr) \ + _(IFLA_BROADCAST, broadcast) \ + _(IFLA_IFNAME, ifname) \ + _(IFLA_MASTER, master) \ + _(IFLA_MTU, mtu) \ + _(IFLA_QDISC, qdisc) + +static rtnl_mapping_t ns_ifmap[] = { +#define _(t, e) \ + { \ + .type = t, \ + .offset = offsetof(ns_link_t, e), \ + .size = sizeof(((ns_link_t*)0)->e) \ + }, + ns_foreach_ifla +#undef _ + { .type = 0 } +}; + +u8 *format_ns_link (u8 *s, va_list *args) +{ + ns_link_t *l = va_arg(*args, ns_link_t *); + s = format(s, "%s index %u", l->ifname, l->ifi.ifi_index); + return s; +} + +#define ns_foreach_rta \ + _(RTA_DST, dst, 1) \ + _(RTA_SRC, src, 1) \ + _(RTA_GATEWAY, gateway, 1) \ + _(RTA_IIF, iif, 1) \ + _(RTA_OIF, oif, 1) \ + _(RTA_PREFSRC, prefsrc, 0) \ + _(RTA_TABLE, table, 0) \ + _(RTA_PRIORITY, priority, 0) \ + _(RTA_CACHEINFO, cacheinfo, 0) \ + _(RTA_ENCAP, encap, 1) + +static rtnl_mapping_t ns_routemap[] = { +#define _(t, e, u) \ + { \ + .type = t, .unique = u, \ + .offset = offsetof(ns_route_t, e), \ + .size = sizeof(((ns_route_t*)0)->e) \ + }, + ns_foreach_rta +#undef _ + { .type = 0 } +}; + +u8 *format_ns_route (u8 *s, va_list *args) +{ + ns_route_t *r = va_arg(*args, ns_route_t *); + void *format_ip = r->rtm.rtm_family == AF_INET ? format_ip4_address : format_ip6_address; + s = format(s, "%U/%d", format_ip, r->dst, r->rtm.rtm_dst_len); + if (r->rtm.rtm_src_len) + s = format(s, " from %U/%d", format_ip, r->src, r->rtm.rtm_src_len); + if (is_nonzero(r->gateway)) + s = format(s, " via %U", format_ip, r->gateway); + if (r->iif) + s = format(s, " iif %d", r->iif); + if (r->oif) + s = format(s, " oif %d", r->oif); + if (is_nonzero(r->prefsrc)) + s = format(s, " src %U", format_ip, r->prefsrc); + if (r->table) + s = format(s, " table %d", r->table); + if (r->priority) + s = format(s, " priority %u", r->priority); + return s; +} + +#define ns_foreach_ifaddr \ + _(IFA_ADDRESS, addr, 1) \ + _(IFA_LOCAL, local, 1) \ + _(IFA_LABEL, label, 0) \ + _(IFA_BROADCAST, broadcast, 0) \ + _(IFA_ANYCAST, anycast, 0) \ + _(IFA_CACHEINFO, cacheinfo, 0) + +static rtnl_mapping_t ns_addrmap[] = { +#define _(t, e, u) \ + { \ + .type = t, .unique = u, \ + .offset = offsetof(ns_addr_t, e), \ + .size = sizeof(((ns_addr_t*)0)->e) \ + }, + ns_foreach_ifaddr +#undef _ + { .type = 0 } +}; + +u8 *format_ns_addr (u8 *s, va_list *args) +{ + ns_addr_t *a = va_arg(*args, ns_addr_t *); + void *format_ip = a->ifaddr.ifa_family == AF_INET ? format_ip4_address : format_ip6_address; + s = format(s, "%U/%d", format_ip, a->addr, a->ifaddr.ifa_prefixlen); + if (is_nonzero(a->label)) + s = format(s, " dev %s", a->label); + if (is_nonzero(a->broadcast)) + s = format(s, " broadcast %U", format_ip, a->broadcast); + if (is_nonzero(a->anycast)) + s = format(s, " anycast %U", format_ip, a->anycast); + if (is_nonzero(a->local)) + s = format(s, " local %U", format_ip, a->local); + return s; +} + +#ifndef NDA_RTA +#define NDA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg)))) +#define NDA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ndmsg)) +#endif + +#define ns_foreach_neigh \ + _(NDA_DST, dst, 1) \ + _(NDA_LLADDR, lladdr, 0) \ + _(NDA_PROBES, probes, 0) \ + _(NDA_CACHEINFO, cacheinfo, 0) + +static rtnl_mapping_t ns_neighmap[] = { +#define _(t, e, u) \ + { \ + .type = t, .unique = u, \ + .offset = offsetof(ns_neigh_t, e), \ + .size = sizeof(((ns_neigh_t*)0)->e) \ + }, + ns_foreach_neigh +#undef _ + { .type = 0 } +}; + +u8 *format_ns_neigh (u8 *s, va_list *args) +{ + ns_neigh_t *n = va_arg(*args, ns_neigh_t *); + void *format_ip = n->nd.ndm_family == AF_INET ? format_ip4_address : format_ip6_address; + s = format(s, "%U", format_ip, n->dst); + if (is_nonzero(n->lladdr)) + s = format(s, " lladdr %U", format_ethernet_address, n->lladdr); + if (n->probes) + s = format(s, " probes %d", n->probes); + return s; +} + +typedef struct { + void (*notify)(void *obj, netns_type_t type, u32 flags, uword opaque); + uword opaque; + u32 netns_index; +} netns_handle_t; + +typedef struct { + netns_t netns; + u32 rtnl_handle; + u32 subscriber_count; +} netns_p; + +typedef struct { + netns_p *netnss; + netns_handle_t *handles; +} netns_main_t; + +netns_main_t netns_main; + +static int +rtnl_parse_rtattr(struct rtattr *db[], size_t max, + struct rtattr *rta, size_t len) { + for(; RTA_OK(rta, len); rta = RTA_NEXT(rta, len)) { + if (rta->rta_type <= max) + db[rta->rta_type] = rta; +#ifdef RTNL_CHECK + else + clib_warning("RTA type too high: %d", rta->rta_type); +#endif + } + + if(len) { + clib_warning("rattr lenght mistmatch %d %d len", + (int) len, (int) rta->rta_len); + return -1; + } + return 0; +} + +/* + * Debug function to display when + * we receive an RTA that I forgot in + * the mapping table (there are so many of them). + */ +#ifdef RTNL_CHECK +static void +rtnl_entry_check(struct rtattr *rtas[], + size_t rta_len, + rtnl_mapping_t map[], + char *logstr) +{ + int i; + for (i=0; i<rta_len; i++) { + if (!rtas[i]) + continue; + + rtnl_mapping_t *m = map; + for (m = map; m->type; m++) { + if (m->type == rtas[i]->rta_type) + break; + } + if (!m->type) + clib_warning("Unknown RTA type %d (%s)", rtas[i]->rta_type, logstr); + } +} +#endif + +/* + * Check if the provided entry matches the parsed and unique rtas + */ +static int +rtnl_entry_match(void *entry, + struct rtattr *rtas[], + rtnl_mapping_t map[]) +{ + u8 zero[1024] = {}; + for ( ;map->type != 0; map++) { + struct rtattr *rta = rtas[map->type]; + size_t rta_len = rta?RTA_PAYLOAD(rta):0; + if (!map->unique) + continue; + + if (rta && RTA_PAYLOAD(rta) > map->size) { + clib_warning("rta (type=%d len=%d) too long (max %d)", + rta->rta_type, rta->rta_len, map->size); + return -1; + } + + if ((rta && memcmp(RTA_DATA(rta), entry + map->offset, rta_len)) || + memcmp(entry + map->offset + rta_len, zero, map->size - rta_len)) { + return 0; + } + } + return 1; +} + +static int +rtnl_entry_set(void *entry, + struct rtattr *rtas[], + rtnl_mapping_t map[], + int init) +{ + for (; map->type != 0; map++) { + + struct rtattr *rta = rtas[map->type]; + + if(map->type == RTA_ENCAP && rta) { + /*Data of RTA_ENCAP is a pointer to rta attributes for MPLS*/ + rta = (struct rtattr*)RTA_DATA(rta); + if (RTA_PAYLOAD(rta) > map->size) { + clib_warning("rta (type=%d len=%d) too long (max %d)", rta->rta_type, rta->rta_len, map->size); + return -1; + } + memcpy(entry + map->offset, RTA_DATA(rta), map->size); + memset(entry + map->offset + map->size, 0, 0); + } else if (rta) { + if (RTA_PAYLOAD(rta) > map->size) { + clib_warning("rta (type=%d len=%d) too long (max %d)", rta->rta_type, rta->rta_len, map->size); + return -1; + } + memcpy(entry + map->offset, RTA_DATA(rta), RTA_PAYLOAD(rta)); + memset(entry + map->offset + RTA_PAYLOAD(rta), 0, map->size - RTA_PAYLOAD(rta)); + } else if (init) { + memset(entry + map->offset, 0, map->size); + } + } + return 0; +} + +void +netns_notify(netns_p *ns, void *obj, netns_type_t type, u32 flags) +{ + netns_main_t *nm = &netns_main; + netns_handle_t *h; + pool_foreach(h, nm->handles, { + if (h->netns_index == (ns - nm->netnss) && h->notify) + h->notify(obj, type, flags, h->opaque); + }); +} + +static_always_inline int +mask_match(void *a, void *b, void *mask, size_t len) +{ + u8 *va = (u8 *) a; + u8 *vb = (u8 *) b; + u8 *vm = (u8 *) mask; + while (len--) { + if ((va[len] ^ vb[len]) & vm[len]) + return 0; + } + return 1; +} + +static ns_link_t * +ns_get_link(netns_p *ns, struct ifinfomsg *ifi, struct rtattr *rtas[]) +{ + ns_link_t *link; + pool_foreach(link, ns->netns.links, { + if(ifi->ifi_index == link->ifi.ifi_index) + return link; + }); + return NULL; +} + +static int +ns_rcv_link(netns_p *ns, struct nlmsghdr *hdr) +{ + ns_link_t *link; + struct ifinfomsg *ifi; + struct rtattr *rtas[IFLA_MAX + 1] = {}; + size_t datalen = hdr->nlmsg_len - NLMSG_ALIGN(sizeof(*hdr)); + + if(datalen < sizeof(*ifi)) + return -1; + + ifi = NLMSG_DATA(hdr); + if((datalen > NLMSG_ALIGN(sizeof(*ifi))) && + rtnl_parse_rtattr(rtas, IFLA_MAX, IFLA_RTA(ifi), + IFLA_PAYLOAD(hdr))) { + return -1; + } +#ifdef RTNL_CHECK + rtnl_entry_check(rtas, IFLA_MAX + 1, ns_ifmap, "link"); +#endif + + link = ns_get_link(ns, ifi, rtas); + + if (hdr->nlmsg_type == RTM_DELLINK) { + if (!link) + return -1; + pool_put(ns->netns.links, link); + netns_notify(ns, link, NETNS_TYPE_LINK, NETNS_F_DEL); + return 0; + } + + if (!link) { + pool_get(ns->netns.links, link); + rtnl_entry_set(link, rtas, ns_ifmap, 1); + } else { + rtnl_entry_set(link, rtas, ns_ifmap, 0); + } + + link->ifi = *ifi; + link->last_updated = vlib_time_now(vlib_get_main()); + netns_notify(ns, link, NETNS_TYPE_LINK, NETNS_F_ADD); + return 0; +} + +static ns_route_t * +ns_get_route(netns_p *ns, struct rtmsg *rtm, struct rtattr *rtas[]) +{ + ns_route_t *route; + + //This describes the values which uniquely identify a route + struct rtmsg msg = { + .rtm_family = 0xff, + .rtm_dst_len = 0xff, + .rtm_src_len = 0xff, + .rtm_table = 0xff, + .rtm_protocol = 0xff, + .rtm_type = 0xff + }; + + pool_foreach(route, ns->netns.routes, { + if(mask_match(&route->rtm, rtm, &msg, sizeof(struct rtmsg)) && + rtnl_entry_match(route, rtas, ns_routemap)) + return route; + }); + return NULL; +} + +static int +ns_rcv_route(netns_p *ns, struct nlmsghdr *hdr) +{ + ns_route_t *route; + struct rtmsg *rtm; + struct rtattr *rtas[RTA_MAX + 1] = {}; + size_t datalen = hdr->nlmsg_len - NLMSG_ALIGN(sizeof(*hdr)); + + if(datalen < sizeof(*rtm)) + return -1; + + rtm = NLMSG_DATA(hdr); + if((datalen > NLMSG_ALIGN(sizeof(*rtm))) && + rtnl_parse_rtattr(rtas, RTA_MAX, RTM_RTA(rtm), + RTM_PAYLOAD(hdr))) { + return -1; + } +#ifdef RTNL_CHECK + rtnl_entry_check(rtas, RTA_MAX + 1, ns_routemap, "route"); +#endif + route = ns_get_route(ns, rtm, rtas); + + if (hdr->nlmsg_type == RTM_DELROUTE) { + if (!route) + return -1; + pool_put(ns->netns.routes, route); + netns_notify(ns, route, NETNS_TYPE_ROUTE, NETNS_F_DEL); + return 0; + } + + if (!route) { + pool_get(ns->netns.routes, route); + memset(route, 0, sizeof(*route)); + rtnl_entry_set(route, rtas, ns_routemap, 1); + } else { + rtnl_entry_set(route, rtas, ns_routemap, 0); + } + + route->rtm = *rtm; + route->last_updated = vlib_time_now(vlib_get_main()); + netns_notify(ns, route, NETNS_TYPE_ROUTE, NETNS_F_ADD); + return 0; +} + +static ns_addr_t * +ns_get_addr(netns_p *ns, struct ifaddrmsg *ifaddr, struct rtattr *rtas[]) +{ + ns_addr_t *addr; + + //This describes the values which uniquely identify a route + struct ifaddrmsg msg = { + .ifa_family = 0xff, + .ifa_prefixlen = 0xff, + }; + + pool_foreach(addr, ns->netns.addresses, { + if(mask_match(&addr->ifaddr, ifaddr, &msg, sizeof(struct ifaddrmsg)) && + rtnl_entry_match(addr, rtas, ns_addrmap)) + return addr; + }); + return NULL; +} + +static int +ns_rcv_addr(netns_p *ns, struct nlmsghdr *hdr) +{ + ns_addr_t *addr; + struct ifaddrmsg *ifaddr; + struct rtattr *rtas[IFA_MAX + 1] = {}; + size_t datalen = hdr->nlmsg_len - NLMSG_ALIGN(sizeof(*hdr)); + + if(datalen < sizeof(*ifaddr)) + return -1; + + ifaddr = NLMSG_DATA(hdr); + if((datalen > NLMSG_ALIGN(sizeof(*ifaddr))) && + rtnl_parse_rtattr(rtas, IFA_MAX, IFA_RTA(ifaddr), + IFA_PAYLOAD(hdr))) { + return -1; + } +#ifdef RTNL_CHECK + rtnl_entry_check(rtas, IFA_MAX + 1, ns_addrmap, "addr"); +#endif + addr = ns_get_addr(ns, ifaddr, rtas); + + if (hdr->nlmsg_type == RTM_DELADDR) { + if (!addr) + return -1; + pool_put(ns->netns.addresses, addr); + netns_notify(ns, addr, NETNS_TYPE_ADDR, NETNS_F_DEL); + return 0; + } + + if (!addr) { + pool_get(ns->netns.addresses, addr); + memset(addr, 0, sizeof(*addr)); + rtnl_entry_set(addr, rtas, ns_addrmap, 1); + } else { + rtnl_entry_set(addr, rtas, ns_addrmap, 0); + } + + addr->ifaddr = *ifaddr; + addr->last_updated = vlib_time_now(vlib_get_main()); + netns_notify(ns, addr, NETNS_TYPE_ADDR, NETNS_F_ADD); + return 0; +} + +static ns_neigh_t * +ns_get_neigh(netns_p *ns, struct ndmsg *nd, struct rtattr *rtas[]) +{ + ns_neigh_t *neigh; + + //This describes the values which uniquely identify a route + struct ndmsg msg = { + .ndm_family = 0xff, + .ndm_ifindex = 0xff, + }; + + pool_foreach(neigh, ns->netns.neighbors, { + if(mask_match(&neigh->nd, nd, &msg, sizeof(&msg)) && + rtnl_entry_match(neigh, rtas, ns_neighmap)) + return neigh; + }); + return NULL; +} + +static int +ns_rcv_neigh(netns_p *ns, struct nlmsghdr *hdr) +{ + ns_neigh_t *neigh; + struct ndmsg *nd; + struct rtattr *rtas[NDA_MAX + 1] = {}; + size_t datalen = hdr->nlmsg_len - NLMSG_ALIGN(sizeof(*hdr)); + + if(datalen < sizeof(*nd)) + return -1; + + nd = NLMSG_DATA(hdr); + if((datalen > NLMSG_ALIGN(sizeof(*nd))) && + rtnl_parse_rtattr(rtas, NDA_MAX, NDA_RTA(nd), + NDA_PAYLOAD(hdr))) { + return -1; + } +#ifdef RTNL_CHECK + rtnl_entry_check(rtas, NDA_MAX + 1, ns_neighmap, "nd"); +#endif + neigh = ns_get_neigh(ns, nd, rtas); + + if (hdr->nlmsg_type == RTM_DELNEIGH) { + if (!neigh) + return -1; + pool_put(ns->netns.neighbors, neigh); + netns_notify(ns, neigh, NETNS_TYPE_NEIGH, NETNS_F_DEL); + return 0; + } + + if (!neigh) { + pool_get(ns->netns.neighbors, neigh); + memset(neigh, 0, sizeof(*neigh)); + rtnl_entry_set(neigh, rtas, ns_neighmap, 1); + } else { + rtnl_entry_set(neigh, rtas, ns_neighmap, 0); + } + + neigh->nd = *nd; + neigh->last_updated = vlib_time_now(vlib_get_main()); + netns_notify(ns, neigh, NETNS_TYPE_NEIGH, NETNS_F_ADD); + return 0; +} + +#define ns_object_foreach \ + _(neighbors, NETNS_TYPE_NEIGH) \ + _(routes, NETNS_TYPE_ROUTE) \ + _(addresses, NETNS_TYPE_ADDR) \ + _(links, NETNS_TYPE_LINK) + +static void +ns_recv_error(rtnl_error_t err, uword o) +{ + //An error was received. Reset everything. + netns_p *ns = &netns_main.netnss[o]; + u32 *indexes = 0; + u32 *i = 0; + +#define _(pool, type) \ + pool_foreach_index(*i, ns->netns.pool, { \ + vec_add1(indexes, *i); \ + }) \ + vec_foreach(i, indexes) { \ + pool_put_index(ns->netns.pool, *i); \ + netns_notify(ns, &ns->netns.pool[*i], type, NETNS_F_DEL); \ + } \ + vec_reset_length(indexes); + + ns_object_foreach + +#undef _ + vec_free(indexes); +} + +static void +ns_recv_rtnl(struct nlmsghdr *hdr, uword o) +{ + netns_p *ns = &netns_main.netnss[o]; + switch (hdr->nlmsg_type) { + case RTM_NEWROUTE: + case RTM_DELROUTE: + ns_rcv_route(ns, hdr); + break; + case RTM_NEWLINK: + case RTM_DELLINK: + ns_rcv_link(ns, hdr); + break; + case RTM_NEWADDR: + case RTM_DELADDR: + ns_rcv_addr(ns, hdr); + break; + case RTM_NEWNEIGH: + case RTM_DELNEIGH: + ns_rcv_neigh(ns, hdr); + break; + default: + clib_warning("unknown rtnl type %d", hdr->nlmsg_type); + break; + } +} + +static void +netns_destroy(netns_p *ns) +{ + netns_main_t *nm = &netns_main; + rtnl_stream_close(ns->rtnl_handle); + pool_put(nm->netnss, ns); + pool_free(ns->netns.links); + pool_free(ns->netns.addresses); + pool_free(ns->netns.routes); + pool_free(ns->netns.neighbors); +} + +static netns_p * +netns_get(char *name) +{ + netns_main_t *nm = &netns_main; + netns_p *ns; + pool_foreach(ns, nm->netnss, { + if (!strcmp(name, ns->netns.name)) + return ns; + }); + + if (strlen(name) > RTNL_NETNS_NAMELEN) + return NULL; + + pool_get(nm->netnss, ns); + rtnl_stream_t s = { + .recv_message = ns_recv_rtnl, + .error = ns_recv_error, + .opaque = (uword)(ns - nm->netnss), + }; + strcpy(s.name, name); + + u32 handle; + if ((handle = rtnl_stream_open(&s)) == ~0) { + pool_put(nm->netnss, ns); + return NULL; + } + + strcpy(ns->netns.name, name); + ns->netns.addresses = 0; + ns->netns.links = 0; + ns->netns.neighbors = 0; + ns->netns.routes = 0; + ns->subscriber_count = 0; + ns->rtnl_handle = handle; + return ns; +} + +u32 netns_open(char *name, netns_sub_t *sub) +{ + netns_main_t *nm = &netns_main; + netns_p *ns; + netns_handle_t *p; + if (!(ns = netns_get(name))) + return ~0; + + pool_get(nm->handles, p); + p->netns_index = ns - nm->netnss; + p->notify = sub->notify; + p->opaque = sub->opaque; + ns->subscriber_count++; + return p - nm->handles; +} + +netns_t *netns_getns(u32 handle) +{ + netns_main_t *nm = &netns_main; + netns_handle_t *h = pool_elt_at_index(nm->handles, handle); + netns_p *ns = pool_elt_at_index(nm->netnss, h->netns_index); + return &ns->netns; +} + +void netns_close(u32 handle) +{ + netns_main_t *nm = &netns_main; + netns_handle_t *h = pool_elt_at_index(nm->handles, handle); + netns_p *ns = pool_elt_at_index(nm->netnss, h->netns_index); + pool_put(h, nm->handles); + ns->subscriber_count--; + if (!ns->subscriber_count) + netns_destroy(ns); +} + +void netns_callme(u32 handle, char del) +{ + netns_main_t *nm = &netns_main; + netns_handle_t *h = pool_elt_at_index(nm->handles, handle); + netns_p *ns = pool_elt_at_index(nm->netnss, h->netns_index); + u32 i = 0; + if (!h->notify) + return; + +#define _(pool, type) \ + pool_foreach_index(i, ns->netns.pool, { \ + h->notify(&ns->netns.pool[i], type, \ + del?NETNS_F_DEL:NETNS_F_ADD, h->opaque); \ + }); + + ns_object_foreach +#undef _ + + } + +u8 *format_ns_object(u8 *s, va_list *args) +{ + netns_type_t t = va_arg(*args, netns_type_t); + void *o = va_arg(*args, void *); + switch (t) { + case NETNS_TYPE_ADDR: + return format(s, "addr %U", format_ns_addr, o); + case NETNS_TYPE_ROUTE: + return format(s, "route %U", format_ns_route, o); + case NETNS_TYPE_LINK: + return format(s, "link %U", format_ns_link, o); + case NETNS_TYPE_NEIGH: + return format(s, "neigh %U", format_ns_neigh, o); + } + return s; +} + +u8 *format_ns_flags(u8 *s, va_list *args) +{ + u32 flags = va_arg(*args, u32); + if (flags & NETNS_F_ADD) + s = format(s, "add"); + else if (flags & NETNS_F_DEL) + s = format(s, "del"); + else + s = format(s, "mod"); + return s; +} + +clib_error_t * +netns_init (vlib_main_t * vm) +{ + netns_main_t *nm = &netns_main; + nm->netnss = 0; + nm->handles = 0; + return 0; +} + +VLIB_INIT_FUNCTION (netns_init); |