diff options
Diffstat (limited to 'net/tipc')
| -rw-r--r-- | net/tipc/bearer.c | 130 | ||||
| -rw-r--r-- | net/tipc/bearer.h | 2 | ||||
| -rw-r--r-- | net/tipc/link.c | 18 | ||||
| -rw-r--r-- | net/tipc/net.h | 2 | ||||
| -rw-r--r-- | net/tipc/netlink.c | 18 | ||||
| -rw-r--r-- | net/tipc/node.c | 63 | ||||
| -rw-r--r-- | net/tipc/node.h | 1 | ||||
| -rw-r--r-- | net/tipc/udp_media.c | 521 | ||||
| -rw-r--r-- | net/tipc/udp_media.h | 46 |
9 files changed, 663 insertions, 138 deletions
diff --git a/net/tipc/bearer.c b/net/tipc/bearer.c index 65b1bbf133bd..975dbeb60ab0 100644 --- a/net/tipc/bearer.c +++ b/net/tipc/bearer.c @@ -42,6 +42,7 @@ #include "monitor.h" #include "bcast.h" #include "netlink.h" +#include "udp_media.h" #define MAX_ADDR_STR 60 @@ -56,6 +57,13 @@ static struct tipc_media * const media_info_array[] = { NULL }; +static struct tipc_bearer *bearer_get(struct net *net, int bearer_id) +{ + struct tipc_net *tn = tipc_net(net); + + return rcu_dereference_rtnl(tn->bearer_list[bearer_id]); +} + static void bearer_disable(struct net *net, struct tipc_bearer *b); /** @@ -323,6 +331,7 @@ restart: b->domain = disc_domain; b->net_plane = bearer_id + 'A'; b->priority = priority; + test_and_set_bit_lock(0, &b->up); res = tipc_disc_create(net, b, &b->bcast_addr, &skb); if (res) { @@ -360,15 +369,24 @@ static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b) */ void tipc_bearer_reset_all(struct net *net) { - struct tipc_net *tn = tipc_net(net); struct tipc_bearer *b; int i; for (i = 0; i < MAX_BEARERS; i++) { - b = rcu_dereference_rtnl(tn->bearer_list[i]); + b = bearer_get(net, i); + if (b) + clear_bit_unlock(0, &b->up); + } + for (i = 0; i < MAX_BEARERS; i++) { + b = bearer_get(net, i); if (b) tipc_reset_bearer(net, b); } + for (i = 0; i < MAX_BEARERS; i++) { + b = bearer_get(net, i); + if (b) + test_and_set_bit_lock(0, &b->up); + } } /** @@ -382,8 +400,9 @@ static void bearer_disable(struct net *net, struct tipc_bearer *b) int bearer_id = b->identity; pr_info("Disabling bearer <%s>\n", b->name); - b->media->disable_media(b); + clear_bit_unlock(0, &b->up); tipc_node_delete_links(net, bearer_id); + b->media->disable_media(b); RCU_INIT_POINTER(b->media_ptr, NULL); if (b->link_req) tipc_disc_delete(b->link_req); @@ -440,22 +459,16 @@ int tipc_l2_send_msg(struct net *net, struct sk_buff *skb, { struct net_device *dev; int delta; - void *tipc_ptr; dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr); if (!dev) return 0; - /* Send RESET message even if bearer is detached from device */ - tipc_ptr = rcu_dereference_rtnl(dev->tipc_ptr); - if (unlikely(!tipc_ptr && !msg_is_reset(buf_msg(skb)))) - goto drop; - - delta = dev->hard_header_len - skb_headroom(skb); - if ((delta > 0) && - pskb_expand_head(skb, SKB_DATA_ALIGN(delta), 0, GFP_ATOMIC)) - goto drop; - + delta = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb)); + if ((delta > 0) && pskb_expand_head(skb, delta, 0, GFP_ATOMIC)) { + kfree_skb(skb); + return 0; + } skb_reset_network_header(skb); skb->dev = dev; skb->protocol = htons(ETH_P_TIPC); @@ -463,9 +476,6 @@ int tipc_l2_send_msg(struct net *net, struct sk_buff *skb, dev->dev_addr, skb->len); dev_queue_xmit(skb); return 0; -drop: - kfree_skb(skb); - return 0; } int tipc_bearer_mtu(struct net *net, u32 bearer_id) @@ -487,12 +497,12 @@ void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id, struct sk_buff *skb, struct tipc_media_addr *dest) { - struct tipc_net *tn = tipc_net(net); + struct tipc_msg *hdr = buf_msg(skb); struct tipc_bearer *b; rcu_read_lock(); - b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); - if (likely(b)) + b = bearer_get(net, bearer_id); + if (likely(b && (test_bit(0, &b->up) || msg_is_reset(hdr)))) b->media->send_msg(net, skb, b, dest); else kfree_skb(skb); @@ -505,7 +515,6 @@ void tipc_bearer_xmit(struct net *net, u32 bearer_id, struct sk_buff_head *xmitq, struct tipc_media_addr *dst) { - struct tipc_net *tn = net_generic(net, tipc_net_id); struct tipc_bearer *b; struct sk_buff *skb, *tmp; @@ -513,12 +522,15 @@ void tipc_bearer_xmit(struct net *net, u32 bearer_id, return; rcu_read_lock(); - b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); + b = bearer_get(net, bearer_id); if (unlikely(!b)) __skb_queue_purge(xmitq); skb_queue_walk_safe(xmitq, skb, tmp) { __skb_dequeue(xmitq); - b->media->send_msg(net, skb, b, dst); + if (likely(test_bit(0, &b->up) || msg_is_reset(buf_msg(skb)))) + b->media->send_msg(net, skb, b, dst); + else + kfree_skb(skb); } rcu_read_unlock(); } @@ -535,8 +547,8 @@ void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id, struct tipc_msg *hdr; rcu_read_lock(); - b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); - if (unlikely(!b)) + b = bearer_get(net, bearer_id); + if (unlikely(!b || !test_bit(0, &b->up))) __skb_queue_purge(xmitq); skb_queue_walk_safe(xmitq, skb, tmp) { hdr = buf_msg(skb); @@ -566,7 +578,8 @@ static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev, rcu_read_lock(); b = rcu_dereference_rtnl(dev->tipc_ptr); - if (likely(b && (skb->pkt_type <= PACKET_BROADCAST))) { + if (likely(b && test_bit(0, &b->up) && + (skb->pkt_type <= PACKET_BROADCAST))) { skb->next = NULL; tipc_rcv(dev_net(dev), skb, b); rcu_read_unlock(); @@ -591,18 +604,9 @@ static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt, { struct net_device *dev = netdev_notifier_info_to_dev(ptr); struct net *net = dev_net(dev); - struct tipc_net *tn = tipc_net(net); struct tipc_bearer *b; - int i; b = rtnl_dereference(dev->tipc_ptr); - if (!b) { - for (i = 0; i < MAX_BEARERS; b = NULL, i++) { - b = rtnl_dereference(tn->bearer_list[i]); - if (b && (b->media_ptr == dev)) - break; - } - } if (!b) return NOTIFY_DONE; @@ -613,11 +617,10 @@ static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt, if (netif_carrier_ok(dev)) break; case NETDEV_UP: - rcu_assign_pointer(dev->tipc_ptr, b); + test_and_set_bit_lock(0, &b->up); break; case NETDEV_GOING_DOWN: - RCU_INIT_POINTER(dev->tipc_ptr, NULL); - synchronize_net(); + clear_bit_unlock(0, &b->up); tipc_reset_bearer(net, b); break; case NETDEV_CHANGEMTU: @@ -709,6 +712,14 @@ static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg, goto prop_msg_full; nla_nest_end(msg->skb, prop); + +#ifdef CONFIG_TIPC_MEDIA_UDP + if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP) { + if (tipc_udp_nl_add_bearer_data(msg, bearer)) + goto attr_msg_full; + } +#endif + nla_nest_end(msg->skb, attrs); genlmsg_end(msg->skb, hdr); @@ -895,6 +906,49 @@ int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info) return 0; } +int tipc_nl_bearer_add(struct sk_buff *skb, struct genl_info *info) +{ + int err; + char *name; + struct tipc_bearer *b; + struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; + struct net *net = sock_net(skb->sk); + + if (!info->attrs[TIPC_NLA_BEARER]) + return -EINVAL; + + err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, + info->attrs[TIPC_NLA_BEARER], + tipc_nl_bearer_policy); + if (err) + return err; + + if (!attrs[TIPC_NLA_BEARER_NAME]) + return -EINVAL; + name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); + + rtnl_lock(); + b = tipc_bearer_find(net, name); + if (!b) { + rtnl_unlock(); + return -EINVAL; + } + +#ifdef CONFIG_TIPC_MEDIA_UDP + if (attrs[TIPC_NLA_BEARER_UDP_OPTS]) { + err = tipc_udp_nl_bearer_add(b, + attrs[TIPC_NLA_BEARER_UDP_OPTS]); + if (err) { + rtnl_unlock(); + return err; + } + } +#endif + rtnl_unlock(); + + return 0; +} + int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info) { int err; diff --git a/net/tipc/bearer.h b/net/tipc/bearer.h index 43757f1f9cb3..78892e2f53e3 100644 --- a/net/tipc/bearer.h +++ b/net/tipc/bearer.h @@ -150,6 +150,7 @@ struct tipc_bearer { u32 identity; struct tipc_link_req *link_req; char net_plane; + unsigned long up; }; struct tipc_bearer_names { @@ -180,6 +181,7 @@ int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info); int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb); int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info); int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info); +int tipc_nl_bearer_add(struct sk_buff *skb, struct genl_info *info); int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb); int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info); diff --git a/net/tipc/link.c b/net/tipc/link.c index 877d94f34814..2c6e1b9e024b 100644 --- a/net/tipc/link.c +++ b/net/tipc/link.c @@ -807,7 +807,7 @@ void link_prepare_wakeup(struct tipc_link *l) skb_queue_walk_safe(&l->wakeupq, skb, tmp) { imp = TIPC_SKB_CB(skb)->chain_imp; - lim = l->window + l->backlog[imp].limit; + lim = l->backlog[imp].limit; pnd[imp] += TIPC_SKB_CB(skb)->chain_sz; if ((pnd[imp] + l->backlog[imp].len) >= lim) break; @@ -873,9 +873,11 @@ int tipc_link_xmit(struct tipc_link *l, struct sk_buff_head *list, struct sk_buff *skb, *_skb, *bskb; /* Match msg importance against this and all higher backlog limits: */ - for (i = imp; i <= TIPC_SYSTEM_IMPORTANCE; i++) { - if (unlikely(l->backlog[i].len >= l->backlog[i].limit)) - return link_schedule_user(l, list); + if (!skb_queue_empty(backlogq)) { + for (i = imp; i <= TIPC_SYSTEM_IMPORTANCE; i++) { + if (unlikely(l->backlog[i].len >= l->backlog[i].limit)) + return link_schedule_user(l, list); + } } if (unlikely(msg_size(hdr) > mtu)) { skb_queue_purge(list); @@ -1692,10 +1694,10 @@ void tipc_link_set_queue_limits(struct tipc_link *l, u32 win) int max_bulk = TIPC_MAX_PUBLICATIONS / (l->mtu / ITEM_SIZE); l->window = win; - l->backlog[TIPC_LOW_IMPORTANCE].limit = win / 2; - l->backlog[TIPC_MEDIUM_IMPORTANCE].limit = win; - l->backlog[TIPC_HIGH_IMPORTANCE].limit = win / 2 * 3; - l->backlog[TIPC_CRITICAL_IMPORTANCE].limit = win * 2; + l->backlog[TIPC_LOW_IMPORTANCE].limit = max_t(u16, 50, win); + l->backlog[TIPC_MEDIUM_IMPORTANCE].limit = max_t(u16, 100, win * 2); + l->backlog[TIPC_HIGH_IMPORTANCE].limit = max_t(u16, 150, win * 3); + l->backlog[TIPC_CRITICAL_IMPORTANCE].limit = max_t(u16, 200, win * 4); l->backlog[TIPC_SYSTEM_IMPORTANCE].limit = max_bulk; } diff --git a/net/tipc/net.h b/net/tipc/net.h index 77a7a118911d..c7c254902873 100644 --- a/net/tipc/net.h +++ b/net/tipc/net.h @@ -39,6 +39,8 @@ #include <net/genetlink.h> +extern const struct nla_policy tipc_nl_net_policy[]; + int tipc_net_start(struct net *net, u32 addr); void tipc_net_stop(struct net *net); diff --git a/net/tipc/netlink.c b/net/tipc/netlink.c index a84daec0afe9..3200059d14b2 100644 --- a/net/tipc/netlink.c +++ b/net/tipc/netlink.c @@ -41,6 +41,7 @@ #include "link.h" #include "node.h" #include "net.h" +#include "udp_media.h" #include <net/genetlink.h> static const struct nla_policy tipc_nl_policy[TIPC_NLA_MAX + 1] = { @@ -161,6 +162,11 @@ static const struct genl_ops tipc_genl_v2_ops[] = { .policy = tipc_nl_policy, }, { + .cmd = TIPC_NL_BEARER_ADD, + .doit = tipc_nl_bearer_add, + .policy = tipc_nl_policy, + }, + { .cmd = TIPC_NL_BEARER_SET, .doit = tipc_nl_bearer_set, .policy = tipc_nl_policy, @@ -238,6 +244,18 @@ static const struct genl_ops tipc_genl_v2_ops[] = { .dumpit = tipc_nl_node_dump_monitor_peer, .policy = tipc_nl_policy, }, + { + .cmd = TIPC_NL_PEER_REMOVE, + .doit = tipc_nl_peer_rm, + .policy = tipc_nl_policy, + }, +#ifdef CONFIG_TIPC_MEDIA_UDP + { + .cmd = TIPC_NL_UDP_GET_REMOTEIP, + .dumpit = tipc_udp_nl_dump_remoteip, + .policy = tipc_nl_policy, + }, +#endif }; int tipc_nlmsg_parse(const struct nlmsghdr *nlh, struct nlattr ***attr) diff --git a/net/tipc/node.c b/net/tipc/node.c index 21974191e425..7e8b75fd1a02 100644 --- a/net/tipc/node.c +++ b/net/tipc/node.c @@ -1553,6 +1553,69 @@ discard: kfree_skb(skb); } +int tipc_nl_peer_rm(struct sk_buff *skb, struct genl_info *info) +{ + struct net *net = sock_net(skb->sk); + struct tipc_net *tn = net_generic(net, tipc_net_id); + struct nlattr *attrs[TIPC_NLA_NET_MAX + 1]; + struct tipc_node *peer; + u32 addr; + int err; + int i; + + /* We identify the peer by its net */ + if (!info->attrs[TIPC_NLA_NET]) + return -EINVAL; + + err = nla_parse_nested(attrs, TIPC_NLA_NET_MAX, + info->attrs[TIPC_NLA_NET], + tipc_nl_net_policy); + if (err) + return err; + + if (!attrs[TIPC_NLA_NET_ADDR]) + return -EINVAL; + + addr = nla_get_u32(attrs[TIPC_NLA_NET_ADDR]); + + if (in_own_node(net, addr)) + return -ENOTSUPP; + + spin_lock_bh(&tn->node_list_lock); + peer = tipc_node_find(net, addr); + if (!peer) { + spin_unlock_bh(&tn->node_list_lock); + return -ENXIO; + } + + tipc_node_write_lock(peer); + if (peer->state != SELF_DOWN_PEER_DOWN && + peer->state != SELF_DOWN_PEER_LEAVING) { + tipc_node_write_unlock(peer); + err = -EBUSY; + goto err_out; + } + + for (i = 0; i < MAX_BEARERS; i++) { + struct tipc_link_entry *le = &peer->links[i]; + + if (le->link) { + kfree(le->link); + le->link = NULL; + peer->link_cnt--; + } + } + tipc_node_write_unlock(peer); + tipc_node_delete(peer); + + err = 0; +err_out: + tipc_node_put(peer); + spin_unlock_bh(&tn->node_list_lock); + + return err; +} + int tipc_nl_node_dump(struct sk_buff *skb, struct netlink_callback *cb) { int err; diff --git a/net/tipc/node.h b/net/tipc/node.h index d69fdfcc0ec9..4578b34c7dca 100644 --- a/net/tipc/node.h +++ b/net/tipc/node.h @@ -77,6 +77,7 @@ int tipc_nl_node_dump_link(struct sk_buff *skb, struct netlink_callback *cb); int tipc_nl_node_reset_link_stats(struct sk_buff *skb, struct genl_info *info); int tipc_nl_node_get_link(struct sk_buff *skb, struct genl_info *info); int tipc_nl_node_set_link(struct sk_buff *skb, struct genl_info *info); +int tipc_nl_peer_rm(struct sk_buff *skb, struct genl_info *info); int tipc_nl_node_set_monitor(struct sk_buff *skb, struct genl_info *info); int tipc_nl_node_get_monitor(struct sk_buff *skb, struct genl_info *info); diff --git a/net/tipc/udp_media.c b/net/tipc/udp_media.c index ae7e14cae085..dd274687a53d 100644 --- a/net/tipc/udp_media.c +++ b/net/tipc/udp_media.c @@ -49,6 +49,7 @@ #include "core.h" #include "bearer.h" #include "netlink.h" +#include "msg.h" /* IANA assigned UDP port */ #define UDP_PORT_DEFAULT 6118 @@ -70,6 +71,13 @@ struct udp_media_addr { }; }; +/* struct udp_replicast - container for UDP remote addresses */ +struct udp_replicast { + struct udp_media_addr addr; + struct rcu_head rcu; + struct list_head list; +}; + /** * struct udp_bearer - ip/udp bearer data structure * @bearer: associated generic tipc bearer @@ -82,8 +90,20 @@ struct udp_bearer { struct socket *ubsock; u32 ifindex; struct work_struct work; + struct udp_replicast rcast; }; +static int tipc_udp_is_mcast_addr(struct udp_media_addr *addr) +{ + if (ntohs(addr->proto) == ETH_P_IP) + return ipv4_is_multicast(addr->ipv4.s_addr); +#if IS_ENABLED(CONFIG_IPV6) + else + return ipv6_addr_is_multicast(&addr->ipv6); +#endif + return 0; +} + /* udp_media_addr_set - convert a ip/udp address to a TIPC media address */ static void tipc_udp_media_addr_set(struct tipc_media_addr *addr, struct udp_media_addr *ua) @@ -91,15 +111,9 @@ static void tipc_udp_media_addr_set(struct tipc_media_addr *addr, memset(addr, 0, sizeof(struct tipc_media_addr)); addr->media_id = TIPC_MEDIA_TYPE_UDP; memcpy(addr->value, ua, sizeof(struct udp_media_addr)); - if (ntohs(ua->proto) == ETH_P_IP) { - if (ipv4_is_multicast(ua->ipv4.s_addr)) - addr->broadcast = 1; - } else if (ntohs(ua->proto) == ETH_P_IPV6) { - if (ipv6_addr_type(&ua->ipv6) & IPV6_ADDR_MULTICAST) - addr->broadcast = 1; - } else { - pr_err("Invalid UDP media address\n"); - } + + if (tipc_udp_is_mcast_addr(ua)) + addr->broadcast = 1; } /* tipc_udp_addr2str - convert ip/udp address to string */ @@ -140,28 +154,13 @@ static int tipc_udp_addr2msg(char *msg, struct tipc_media_addr *a) } /* tipc_send_msg - enqueue a send request */ -static int tipc_udp_send_msg(struct net *net, struct sk_buff *skb, - struct tipc_bearer *b, - struct tipc_media_addr *dest) +static int tipc_udp_xmit(struct net *net, struct sk_buff *skb, + struct udp_bearer *ub, struct udp_media_addr *src, + struct udp_media_addr *dst) { int ttl, err = 0; - struct udp_bearer *ub; - struct udp_media_addr *dst = (struct udp_media_addr *)&dest->value; - struct udp_media_addr *src = (struct udp_media_addr *)&b->addr.value; struct rtable *rt; - if (skb_headroom(skb) < UDP_MIN_HEADROOM) { - err = pskb_expand_head(skb, UDP_MIN_HEADROOM, 0, GFP_ATOMIC); - if (err) - goto tx_error; - } - - skb_set_inner_protocol(skb, htons(ETH_P_TIPC)); - ub = rcu_dereference_rtnl(b->media_ptr); - if (!ub) { - err = -ENODEV; - goto tx_error; - } if (dst->proto == htons(ETH_P_IP)) { struct flowi4 fl = { .daddr = dst->ipv4.s_addr, @@ -207,29 +206,178 @@ tx_error: return err; } +static int tipc_udp_send_msg(struct net *net, struct sk_buff *skb, + struct tipc_bearer *b, + struct tipc_media_addr *addr) +{ + struct udp_media_addr *src = (struct udp_media_addr *)&b->addr.value; + struct udp_media_addr *dst = (struct udp_media_addr *)&addr->value; + struct udp_replicast *rcast; + struct udp_bearer *ub; + int err = 0; + + if (skb_headroom(skb) < UDP_MIN_HEADROOM) { + err = pskb_expand_head(skb, UDP_MIN_HEADROOM, 0, GFP_ATOMIC); + if (err) + goto out; + } + + skb_set_inner_protocol(skb, htons(ETH_P_TIPC)); + ub = rcu_dereference_rtnl(b->media_ptr); + if (!ub) { + err = -ENODEV; + goto out; + } + + if (!addr->broadcast || list_empty(&ub->rcast.list)) + return tipc_udp_xmit(net, skb, ub, src, dst); + + /* Replicast, send an skb to each configured IP address */ + list_for_each_entry_rcu(rcast, &ub->rcast.list, list) { + struct sk_buff *_skb; + + _skb = pskb_copy(skb, GFP_ATOMIC); + if (!_skb) { + err = -ENOMEM; + goto out; + } + + err = tipc_udp_xmit(net, _skb, ub, src, &rcast->addr); + if (err) { + kfree_skb(_skb); + goto out; + } + } + err = 0; +out: + kfree_skb(skb); + return err; +} + +static bool tipc_udp_is_known_peer(struct tipc_bearer *b, + struct udp_media_addr *addr) +{ + struct udp_replicast *rcast, *tmp; + struct udp_bearer *ub; + + ub = rcu_dereference_rtnl(b->media_ptr); + if (!ub) { + pr_err_ratelimited("UDP bearer instance not found\n"); + return false; + } + + list_for_each_entry_safe(rcast, tmp, &ub->rcast.list, list) { + if (!memcmp(&rcast->addr, addr, sizeof(struct udp_media_addr))) + return true; + } + + return false; +} + +static int tipc_udp_rcast_add(struct tipc_bearer *b, + struct udp_media_addr *addr) +{ + struct udp_replicast *rcast; + struct udp_bearer *ub; + + ub = rcu_dereference_rtnl(b->media_ptr); + if (!ub) + return -ENODEV; + + rcast = kmalloc(sizeof(*rcast), GFP_ATOMIC); + if (!rcast) + return -ENOMEM; + + memcpy(&rcast->addr, addr, sizeof(struct udp_media_addr)); + + if (ntohs(addr->proto) == ETH_P_IP) + pr_info("New replicast peer: %pI4\n", &rcast->addr.ipv4); +#if IS_ENABLED(CONFIG_IPV6) + else if (ntohs(addr->proto) == ETH_P_IPV6) + pr_info("New replicast peer: %pI6\n", &rcast->addr.ipv6); +#endif + + list_add_rcu(&rcast->list, &ub->rcast.list); + return 0; +} + +static int tipc_udp_rcast_disc(struct tipc_bearer *b, struct sk_buff *skb) +{ + struct udp_media_addr src = {0}; + struct udp_media_addr *dst; + + dst = (struct udp_media_addr *)&b->bcast_addr.value; + if (tipc_udp_is_mcast_addr(dst)) + return 0; + + src.port = udp_hdr(skb)->source; + + if (ip_hdr(skb)->version == 4) { + struct iphdr *iphdr = ip_hdr(skb); + + src.proto = htons(ETH_P_IP); + src.ipv4.s_addr = iphdr->saddr; + if (ipv4_is_multicast(iphdr->daddr)) + return 0; +#if IS_ENABLED(CONFIG_IPV6) + } else if (ip_hdr(skb)->version == 6) { + struct ipv6hdr *iphdr = ipv6_hdr(skb); + + src.proto = htons(ETH_P_IPV6); + src.ipv6 = iphdr->saddr; + if (ipv6_addr_is_multicast(&iphdr->daddr)) + return 0; +#endif + } else { + return 0; + } + + if (likely(tipc_udp_is_known_peer(b, &src))) + return 0; + + return tipc_udp_rcast_add(b, &src); +} + /* tipc_udp_recv - read data from bearer socket */ static int tipc_udp_recv(struct sock *sk, struct sk_buff *skb) { struct udp_bearer *ub; struct tipc_bearer *b; + struct tipc_msg *hdr; + int err; ub = rcu_dereference_sk_user_data(sk); if (!ub) { pr_err_ratelimited("Failed to get UDP bearer reference"); - kfree_skb(skb); - return 0; + goto out; } - skb_pull(skb, sizeof(struct udphdr)); + hdr = buf_msg(skb); + rcu_read_lock(); b = rcu_dereference_rtnl(ub->bearer); + if (!b) + goto rcu_out; - if (b) { + if (b && test_bit(0, &b->up)) { tipc_rcv(sock_net(sk), skb, b); rcu_read_unlock(); return 0; } + + if (unlikely(msg_user(hdr) == LINK_CONFIG)) { + err = tipc_udp_rcast_disc(b, skb); + if (err) + goto rcu_out; + } + + tipc_rcv(sock_net(sk), skb, b); rcu_read_unlock(); + return 0; + +rcu_out: + rcu_read_unlock(); +out: kfree_skb(skb); return 0; } @@ -241,15 +389,11 @@ static int enable_mcast(struct udp_bearer *ub, struct udp_media_addr *remote) struct sock *sk = ub->ubsock->sk; if (ntohs(remote->proto) == ETH_P_IP) { - if (!ipv4_is_multicast(remote->ipv4.s_addr)) - return 0; mreqn.imr_multiaddr = remote->ipv4; mreqn.imr_ifindex = ub->ifindex; err = ip_mc_join_group(sk, &mreqn); #if IS_ENABLED(CONFIG_IPV6) } else { - if (!ipv6_addr_is_multicast(&remote->ipv6)) - return 0; err = ipv6_stub->ipv6_sock_mc_join(sk, ub->ifindex, &remote->ipv6); #endif @@ -257,75 +401,234 @@ static int enable_mcast(struct udp_bearer *ub, struct udp_media_addr *remote) return err; } -/** - * parse_options - build local/remote addresses from configuration - * @attrs: netlink config data - * @ub: UDP bearer instance - * @local: local bearer IP address/port - * @remote: peer or multicast IP/port - */ -static int parse_options(struct nlattr *attrs[], struct udp_bearer *ub, - struct udp_media_addr *local, - struct udp_media_addr *remote) +static int __tipc_nl_add_udp_addr(struct sk_buff *skb, + struct udp_media_addr *addr, int nla_t) { - struct nlattr *opts[TIPC_NLA_UDP_MAX + 1]; - struct sockaddr_storage sa_local, sa_remote; + if (ntohs(addr->proto) == ETH_P_IP) { + struct sockaddr_in ip4; - if (!attrs[TIPC_NLA_BEARER_UDP_OPTS]) - goto err; - if (nla_parse_nested(opts, TIPC_NLA_UDP_MAX, - attrs[TIPC_NLA_BEARER_UDP_OPTS], - tipc_nl_udp_policy)) - goto err; - if (opts[TIPC_NLA_UDP_LOCAL] && opts[TIPC_NLA_UDP_REMOTE]) { - nla_memcpy(&sa_local, opts[TIPC_NLA_UDP_LOCAL], - sizeof(sa_local)); - nla_memcpy(&sa_remote, opts[TIPC_NLA_UDP_REMOTE], - sizeof(sa_remote)); + ip4.sin_family = AF_INET; + ip4.sin_port = addr->port; + ip4.sin_addr.s_addr = addr->ipv4.s_addr; + if (nla_put(skb, nla_t, sizeof(ip4), &ip4)) + return -EMSGSIZE; + +#if IS_ENABLED(CONFIG_IPV6) + } else if (ntohs(addr->proto) == ETH_P_IPV6) { + struct sockaddr_in6 ip6; + + ip6.sin6_family = AF_INET6; + ip6.sin6_port = addr->port; + memcpy(&ip6.sin6_addr, &addr->ipv6, sizeof(struct in6_addr)); + if (nla_put(skb, nla_t, sizeof(ip6), &ip6)) + return -EMSGSIZE; +#endif + } + + return 0; +} + +int tipc_udp_nl_dump_remoteip(struct sk_buff *skb, struct netlink_callback *cb) +{ + u32 bid = cb->args[0]; + u32 skip_cnt = cb->args[1]; + u32 portid = NETLINK_CB(cb->skb).portid; + struct udp_replicast *rcast, *tmp; + struct tipc_bearer *b; + struct udp_bearer *ub; + void *hdr; + int err; + int i; + + if (!bid && !skip_cnt) { + struct net *net = sock_net(skb->sk); + struct nlattr *battrs[TIPC_NLA_BEARER_MAX + 1]; + struct nlattr **attrs; + char *bname; + + err = tipc_nlmsg_parse(cb->nlh, &attrs); + if (err) + return err; + + if (!attrs[TIPC_NLA_BEARER]) + return -EINVAL; + + err = nla_parse_nested(battrs, TIPC_NLA_BEARER_MAX, + attrs[TIPC_NLA_BEARER], + tipc_nl_bearer_policy); + if (err) + return err; + + if (!battrs[TIPC_NLA_BEARER_NAME]) + return -EINVAL; + + bname = nla_data(battrs[TIPC_NLA_BEARER_NAME]); + + rtnl_lock(); + b = tipc_bearer_find(net, bname); + if (!b) { + rtnl_unlock(); + return -EINVAL; + } + bid = b->identity; } else { -err: - pr_err("Invalid UDP bearer configuration"); + struct net *net = sock_net(skb->sk); + struct tipc_net *tn = net_generic(net, tipc_net_id); + + rtnl_lock(); + b = rtnl_dereference(tn->bearer_list[bid]); + if (!b) { + rtnl_unlock(); + return -EINVAL; + } + } + + ub = rcu_dereference_rtnl(b->media_ptr); + if (!ub) { + rtnl_unlock(); return -EINVAL; } - if ((sa_local.ss_family & sa_remote.ss_family) == AF_INET) { - struct sockaddr_in *ip4; - - ip4 = (struct sockaddr_in *)&sa_local; - local->proto = htons(ETH_P_IP); - local->port = ip4->sin_port; - local->ipv4.s_addr = ip4->sin_addr.s_addr; - - ip4 = (struct sockaddr_in *)&sa_remote; - remote->proto = htons(ETH_P_IP); - remote->port = ip4->sin_port; - remote->ipv4.s_addr = ip4->sin_addr.s_addr; + + i = 0; + list_for_each_entry_safe(rcast, tmp, &ub->rcast.list, list) { + if (i < skip_cnt) + goto count; + + hdr = genlmsg_put(skb, portid, cb->nlh->nlmsg_seq, + &tipc_genl_family, NLM_F_MULTI, + TIPC_NL_BEARER_GET); + if (!hdr) + goto done; + + err = __tipc_nl_add_udp_addr(skb, &rcast->addr, + TIPC_NLA_UDP_REMOTE); + if (err) { + genlmsg_cancel(skb, hdr); + goto done; + } + genlmsg_end(skb, hdr); +count: + i++; + } +done: + rtnl_unlock(); + cb->args[0] = bid; + cb->args[1] = i; + + return skb->len; +} + +int tipc_udp_nl_add_bearer_data(struct tipc_nl_msg *msg, struct tipc_bearer *b) +{ + struct udp_media_addr *src = (struct udp_media_addr *)&b->addr.value; + struct udp_media_addr *dst; + struct udp_bearer *ub; + struct nlattr *nest; + + ub = rcu_dereference_rtnl(b->media_ptr); + if (!ub) + return -ENODEV; + + nest = nla_nest_start(msg->skb, TIPC_NLA_BEARER_UDP_OPTS); + if (!nest) + goto msg_full; + + if (__tipc_nl_add_udp_addr(msg->skb, src, TIPC_NLA_UDP_LOCAL)) + goto msg_full; + + dst = (struct udp_media_addr *)&b->bcast_addr.value; + if (__tipc_nl_add_udp_addr(msg->skb, dst, TIPC_NLA_UDP_REMOTE)) + goto msg_full; + + if (!list_empty(&ub->rcast.list)) { + if (nla_put_flag(msg->skb, TIPC_NLA_UDP_MULTI_REMOTEIP)) + goto msg_full; + } + + nla_nest_end(msg->skb, nest); + return 0; +msg_full: + nla_nest_cancel(msg->skb, nest); + return -EMSGSIZE; +} + +/** + * tipc_parse_udp_addr - build udp media address from netlink data + * @nlattr: netlink attribute containing sockaddr storage aligned address + * @addr: tipc media address to fill with address, port and protocol type + * @scope_id: IPv6 scope id pointer, not NULL indicates it's required + */ + +static int tipc_parse_udp_addr(struct nlattr *nla, struct udp_media_addr *addr, + u32 *scope_id) +{ + struct sockaddr_storage sa; + + nla_memcpy(&sa, nla, sizeof(sa)); + if (sa.ss_family == AF_INET) { + struct sockaddr_in *ip4 = (struct sockaddr_in *)&sa; + + addr->proto = htons(ETH_P_IP); + addr->port = ip4->sin_port; + addr->ipv4.s_addr = ip4->sin_addr.s_addr; return 0; #if IS_ENABLED(CONFIG_IPV6) - } else if ((sa_local.ss_family & sa_remote.ss_family) == AF_INET6) { - int atype; - struct sockaddr_in6 *ip6; + } else if (sa.ss_family == AF_INET6) { + struct sockaddr_in6 *ip6 = (struct sockaddr_in6 *)&sa; - ip6 = (struct sockaddr_in6 *)&sa_local; - atype = ipv6_addr_type(&ip6->sin6_addr); - if (__ipv6_addr_needs_scope_id(atype) && !ip6->sin6_scope_id) - return -EINVAL; + addr->proto = htons(ETH_P_IPV6); + addr->port = ip6->sin6_port; + memcpy(&addr->ipv6, &ip6->sin6_addr, sizeof(struct in6_addr)); + + /* Scope ID is only interesting for local addresses */ + if (scope_id) { + int atype; - local->proto = htons(ETH_P_IPV6); - local->port = ip6->sin6_port; - memcpy(&local->ipv6, &ip6->sin6_addr, sizeof(struct in6_addr)); - ub->ifindex = ip6->sin6_scope_id; + atype = ipv6_addr_type(&ip6->sin6_addr); + if (__ipv6_addr_needs_scope_id(atype) && + !ip6->sin6_scope_id) { + return -EINVAL; + } + + *scope_id = ip6->sin6_scope_id ? : 0; + } - ip6 = (struct sockaddr_in6 *)&sa_remote; - remote->proto = htons(ETH_P_IPV6); - remote->port = ip6->sin6_port; - memcpy(&remote->ipv6, &ip6->sin6_addr, sizeof(struct in6_addr)); return 0; #endif } return -EADDRNOTAVAIL; } +int tipc_udp_nl_bearer_add(struct tipc_bearer *b, struct nlattr *attr) +{ + int err; + struct udp_media_addr addr = {0}; + struct nlattr *opts[TIPC_NLA_UDP_MAX + 1]; + struct udp_media_addr *dst; + + if (nla_parse_nested(opts, TIPC_NLA_UDP_MAX, attr, tipc_nl_udp_policy)) + return -EINVAL; + + if (!opts[TIPC_NLA_UDP_REMOTE]) + return -EINVAL; + + err = tipc_parse_udp_addr(opts[TIPC_NLA_UDP_REMOTE], &addr, NULL); + if (err) + return err; + + dst = (struct udp_media_addr *)&b->bcast_addr.value; + if (tipc_udp_is_mcast_addr(dst)) { + pr_err("Can't add remote ip to TIPC UDP multicast bearer\n"); + return -EINVAL; + } + + if (tipc_udp_is_known_peer(b, &addr)) + return 0; + + return tipc_udp_rcast_add(b, &addr); +} + /** * tipc_udp_enable - callback to create a new udp bearer instance * @net: network namespace @@ -340,18 +643,37 @@ static int tipc_udp_enable(struct net *net, struct tipc_bearer *b, { int err = -EINVAL; struct udp_bearer *ub; - struct udp_media_addr *remote; + struct udp_media_addr remote = {0}; struct udp_media_addr local = {0}; struct udp_port_cfg udp_conf = {0}; struct udp_tunnel_sock_cfg tuncfg = {NULL}; + struct nlattr *opts[TIPC_NLA_UDP_MAX + 1]; ub = kzalloc(sizeof(*ub), GFP_ATOMIC); if (!ub) return -ENOMEM; - remote = (struct udp_media_addr *)&b->bcast_addr.value; - memset(remote, 0, sizeof(struct udp_media_addr)); - err = parse_options(attrs, ub, &local, remote); + INIT_LIST_HEAD(&ub->rcast.list); + + if (!attrs[TIPC_NLA_BEARER_UDP_OPTS]) + goto err; + + if (nla_parse_nested(opts, TIPC_NLA_UDP_MAX, + attrs[TIPC_NLA_BEARER_UDP_OPTS], + tipc_nl_udp_policy)) + goto err; + + if (!opts[TIPC_NLA_UDP_LOCAL] || !opts[TIPC_NLA_UDP_REMOTE]) { + pr_err("Invalid UDP bearer configuration"); + return -EINVAL; + } + + err = tipc_parse_udp_addr(opts[TIPC_NLA_UDP_LOCAL], &local, + &ub->ifindex); + if (err) + goto err; + + err = tipc_parse_udp_addr(opts[TIPC_NLA_UDP_REMOTE], &remote, NULL); if (err) goto err; @@ -396,9 +718,18 @@ static int tipc_udp_enable(struct net *net, struct tipc_bearer *b, tuncfg.encap_destroy = NULL; setup_udp_tunnel_sock(net, ub->ubsock, &tuncfg); - err = enable_mcast(ub, remote); + /** + * The bcast media address port is used for all peers and the ip + * is used if it's a multicast address. + */ + memcpy(&b->bcast_addr.value, &remote, sizeof(remote)); + if (tipc_udp_is_mcast_addr(&remote)) + err = enable_mcast(ub, &remote); + else + err = tipc_udp_rcast_add(b, &remote); if (err) goto err; + return 0; err: if (ub->ubsock) @@ -411,6 +742,12 @@ err: static void cleanup_bearer(struct work_struct *work) { struct udp_bearer *ub = container_of(work, struct udp_bearer, work); + struct udp_replicast *rcast, *tmp; + + list_for_each_entry_safe(rcast, tmp, &ub->rcast.list, list) { + list_del_rcu(&rcast->list); + kfree_rcu(rcast, rcu); + } if (ub->ubsock) udp_tunnel_sock_release(ub->ubsock); diff --git a/net/tipc/udp_media.h b/net/tipc/udp_media.h new file mode 100644 index 000000000000..281bbae87726 --- /dev/null +++ b/net/tipc/udp_media.h @@ -0,0 +1,46 @@ +/* + * net/tipc/udp_media.h: Include file for UDP bearer media + * + * Copyright (c) 1996-2006, 2013-2016, Ericsson AB + * Copyright (c) 2005, 2010-2011, Wind River Systems + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the names of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#ifdef CONFIG_TIPC_MEDIA_UDP +#ifndef _TIPC_UDP_MEDIA_H +#define _TIPC_UDP_MEDIA_H + +int tipc_udp_nl_bearer_add(struct tipc_bearer *b, struct nlattr *attr); +int tipc_udp_nl_add_bearer_data(struct tipc_nl_msg *msg, struct tipc_bearer *b); +int tipc_udp_nl_dump_remoteip(struct sk_buff *skb, struct netlink_callback *cb); + +#endif +#endif |