diff options
Diffstat (limited to 'net/tipc/link.c')
| -rw-r--r-- | net/tipc/link.c | 881 |
1 files changed, 283 insertions, 598 deletions
diff --git a/net/tipc/link.c b/net/tipc/link.c index 23bcc1132365..a4cf364316de 100644 --- a/net/tipc/link.c +++ b/net/tipc/link.c @@ -40,7 +40,6 @@ #include "socket.h" #include "name_distr.h" #include "discover.h" -#include "config.h" #include "netlink.h" #include <linux/pkt_sched.h> @@ -101,19 +100,20 @@ static const struct nla_policy tipc_nl_prop_policy[TIPC_NLA_PROP_MAX + 1] = { */ #define START_CHANGEOVER 100000u -static void link_handle_out_of_seq_msg(struct tipc_link *l_ptr, - struct sk_buff *buf); -static void tipc_link_proto_rcv(struct tipc_link *l_ptr, struct sk_buff *buf); -static int tipc_link_tunnel_rcv(struct tipc_node *n_ptr, - struct sk_buff **buf); -static void link_set_supervision_props(struct tipc_link *l_ptr, u32 tolerance); +static void link_handle_out_of_seq_msg(struct tipc_link *link, + struct sk_buff *skb); +static void tipc_link_proto_rcv(struct tipc_link *link, + struct sk_buff *skb); +static int tipc_link_tunnel_rcv(struct tipc_node *node, + struct sk_buff **skb); +static void link_set_supervision_props(struct tipc_link *l_ptr, u32 tol); static void link_state_event(struct tipc_link *l_ptr, u32 event); static void link_reset_statistics(struct tipc_link *l_ptr); static void link_print(struct tipc_link *l_ptr, const char *str); static void tipc_link_sync_xmit(struct tipc_link *l); static void tipc_link_sync_rcv(struct tipc_node *n, struct sk_buff *buf); -static int tipc_link_input(struct tipc_link *l, struct sk_buff *buf); -static int tipc_link_prepare_input(struct tipc_link *l, struct sk_buff **buf); +static void tipc_link_input(struct tipc_link *l, struct sk_buff *skb); +static bool tipc_data_input(struct tipc_link *l, struct sk_buff *skb); /* * Simple link routines @@ -123,13 +123,30 @@ static unsigned int align(unsigned int i) return (i + 3) & ~3u; } +static void tipc_link_release(struct kref *kref) +{ + kfree(container_of(kref, struct tipc_link, ref)); +} + +static void tipc_link_get(struct tipc_link *l_ptr) +{ + kref_get(&l_ptr->ref); +} + +static void tipc_link_put(struct tipc_link *l_ptr) +{ + kref_put(&l_ptr->ref, tipc_link_release); +} + static void link_init_max_pkt(struct tipc_link *l_ptr) { + struct tipc_node *node = l_ptr->owner; + struct tipc_net *tn = net_generic(node->net, tipc_net_id); struct tipc_bearer *b_ptr; u32 max_pkt; rcu_read_lock(); - b_ptr = rcu_dereference_rtnl(bearer_list[l_ptr->bearer_id]); + b_ptr = rcu_dereference_rtnl(tn->bearer_list[l_ptr->bearer_id]); if (!b_ptr) { rcu_read_unlock(); return; @@ -169,8 +186,9 @@ int tipc_link_is_active(struct tipc_link *l_ptr) * link_timeout - handle expiration of link timer * @l_ptr: pointer to link */ -static void link_timeout(struct tipc_link *l_ptr) +static void link_timeout(unsigned long data) { + struct tipc_link *l_ptr = (struct tipc_link *)data; struct sk_buff *skb; tipc_node_lock(l_ptr->owner); @@ -215,11 +233,13 @@ static void link_timeout(struct tipc_link *l_ptr) tipc_link_push_packets(l_ptr); tipc_node_unlock(l_ptr->owner); + tipc_link_put(l_ptr); } -static void link_set_timer(struct tipc_link *l_ptr, u32 time) +static void link_set_timer(struct tipc_link *link, unsigned long time) { - k_start_timer(&l_ptr->timer, time); + if (!mod_timer(&link->timer, jiffies + time)) + tipc_link_get(link); } /** @@ -234,6 +254,7 @@ struct tipc_link *tipc_link_create(struct tipc_node *n_ptr, struct tipc_bearer *b_ptr, const struct tipc_media_addr *media_addr) { + struct tipc_net *tn = net_generic(n_ptr->net, tipc_net_id); struct tipc_link *l_ptr; struct tipc_msg *msg; char *if_name; @@ -259,12 +280,12 @@ struct tipc_link *tipc_link_create(struct tipc_node *n_ptr, pr_warn("Link creation failed, no memory\n"); return NULL; } - + kref_init(&l_ptr->ref); l_ptr->addr = peer; if_name = strchr(b_ptr->name, ':') + 1; sprintf(l_ptr->name, "%u.%u.%u:%s-%u.%u.%u:unknown", - tipc_zone(tipc_own_addr), tipc_cluster(tipc_own_addr), - tipc_node(tipc_own_addr), + tipc_zone(tn->own_addr), tipc_cluster(tn->own_addr), + tipc_node(tn->own_addr), if_name, tipc_zone(peer), tipc_cluster(peer), tipc_node(peer)); /* note: peer i/f name is updated by reset/activate message */ @@ -278,9 +299,10 @@ struct tipc_link *tipc_link_create(struct tipc_node *n_ptr, l_ptr->pmsg = (struct tipc_msg *)&l_ptr->proto_msg; msg = l_ptr->pmsg; - tipc_msg_init(msg, LINK_PROTOCOL, RESET_MSG, INT_H_SIZE, l_ptr->addr); + tipc_msg_init(tn->own_addr, msg, LINK_PROTOCOL, RESET_MSG, INT_H_SIZE, + l_ptr->addr); msg_set_size(msg, sizeof(l_ptr->proto_msg)); - msg_set_session(msg, (tipc_random & 0xffff)); + msg_set_session(msg, (tn->random & 0xffff)); msg_set_bearer_id(msg, b_ptr->identity); strcpy((char *)msg_data(msg), if_name); @@ -293,48 +315,52 @@ struct tipc_link *tipc_link_create(struct tipc_node *n_ptr, l_ptr->next_out_no = 1; __skb_queue_head_init(&l_ptr->outqueue); __skb_queue_head_init(&l_ptr->deferred_queue); - skb_queue_head_init(&l_ptr->waiting_sks); - + skb_queue_head_init(&l_ptr->wakeupq); + skb_queue_head_init(&l_ptr->inputq); + skb_queue_head_init(&l_ptr->namedq); link_reset_statistics(l_ptr); - tipc_node_attach_link(n_ptr, l_ptr); - - k_init_timer(&l_ptr->timer, (Handler)link_timeout, - (unsigned long)l_ptr); - + setup_timer(&l_ptr->timer, link_timeout, (unsigned long)l_ptr); link_state_event(l_ptr, STARTING_EVT); return l_ptr; } -void tipc_link_delete_list(unsigned int bearer_id, bool shutting_down) +/** + * link_delete - Conditional deletion of link. + * If timer still running, real delete is done when it expires + * @link: link to be deleted + */ +void tipc_link_delete(struct tipc_link *link) +{ + tipc_link_reset_fragments(link); + tipc_node_detach_link(link->owner, link); + tipc_link_put(link); +} + +void tipc_link_delete_list(struct net *net, unsigned int bearer_id, + bool shutting_down) { - struct tipc_link *l_ptr; - struct tipc_node *n_ptr; + struct tipc_net *tn = net_generic(net, tipc_net_id); + struct tipc_link *link; + struct tipc_node *node; rcu_read_lock(); - list_for_each_entry_rcu(n_ptr, &tipc_node_list, list) { - tipc_node_lock(n_ptr); - l_ptr = n_ptr->links[bearer_id]; - if (l_ptr) { - tipc_link_reset(l_ptr); - if (shutting_down || !tipc_node_is_up(n_ptr)) { - tipc_node_detach_link(l_ptr->owner, l_ptr); - tipc_link_reset_fragments(l_ptr); - tipc_node_unlock(n_ptr); - - /* Nobody else can access this link now: */ - del_timer_sync(&l_ptr->timer); - kfree(l_ptr); - } else { - /* Detach/delete when failover is finished: */ - l_ptr->flags |= LINK_STOPPED; - tipc_node_unlock(n_ptr); - del_timer_sync(&l_ptr->timer); - } + list_for_each_entry_rcu(node, &tn->node_list, list) { + tipc_node_lock(node); + link = node->links[bearer_id]; + if (!link) { + tipc_node_unlock(node); continue; } - tipc_node_unlock(n_ptr); + tipc_link_reset(link); + if (del_timer(&link->timer)) + tipc_link_put(link); + link->flags |= LINK_STOPPED; + /* Delete link now, or when failover is finished: */ + if (shutting_down || !tipc_node_is_up(node)) + tipc_link_delete(link); + tipc_node_unlock(node); } rcu_read_unlock(); } @@ -352,13 +378,14 @@ static bool link_schedule_user(struct tipc_link *link, u32 oport, { struct sk_buff *buf; - buf = tipc_msg_create(SOCK_WAKEUP, 0, INT_H_SIZE, 0, tipc_own_addr, - tipc_own_addr, oport, 0, 0); + buf = tipc_msg_create(SOCK_WAKEUP, 0, INT_H_SIZE, 0, + link_own_addr(link), link_own_addr(link), + oport, 0, 0); if (!buf) return false; TIPC_SKB_CB(buf)->chain_sz = chain_sz; TIPC_SKB_CB(buf)->chain_imp = imp; - skb_queue_tail(&link->waiting_sks, buf); + skb_queue_tail(&link->wakeupq, buf); link->stats.link_congs++; return true; } @@ -369,17 +396,19 @@ static bool link_schedule_user(struct tipc_link *link, u32 oport, * Move a number of waiting users, as permitted by available space in * the send queue, from link wait queue to node wait queue for wakeup */ -static void link_prepare_wakeup(struct tipc_link *link) +void link_prepare_wakeup(struct tipc_link *link) { uint pend_qsz = skb_queue_len(&link->outqueue); struct sk_buff *skb, *tmp; - skb_queue_walk_safe(&link->waiting_sks, skb, tmp) { + skb_queue_walk_safe(&link->wakeupq, skb, tmp) { if (pend_qsz >= link->queue_limit[TIPC_SKB_CB(skb)->chain_imp]) break; pend_qsz += TIPC_SKB_CB(skb)->chain_sz; - skb_unlink(skb, &link->waiting_sks); - skb_queue_tail(&link->owner->waiting_sks, skb); + skb_unlink(skb, &link->wakeupq); + skb_queue_tail(&link->inputq, skb); + link->owner->inputq = &link->inputq; + link->owner->action_flags |= TIPC_MSG_EVT; } } @@ -425,20 +454,20 @@ void tipc_link_reset(struct tipc_link *l_ptr) return; tipc_node_link_down(l_ptr->owner, l_ptr); - tipc_bearer_remove_dest(l_ptr->bearer_id, l_ptr->addr); + tipc_bearer_remove_dest(owner->net, l_ptr->bearer_id, l_ptr->addr); if (was_active_link && tipc_node_active_links(l_ptr->owner)) { l_ptr->reset_checkpoint = checkpoint; l_ptr->exp_msg_count = START_CHANGEOVER; } - /* Clean up all queues: */ + /* Clean up all queues, except inputq: */ __skb_queue_purge(&l_ptr->outqueue); __skb_queue_purge(&l_ptr->deferred_queue); - if (!skb_queue_empty(&l_ptr->waiting_sks)) { - skb_queue_splice_init(&l_ptr->waiting_sks, &owner->waiting_sks); - owner->action_flags |= TIPC_WAKEUP_USERS; - } + skb_queue_splice_init(&l_ptr->wakeupq, &l_ptr->inputq); + if (!skb_queue_empty(&l_ptr->inputq)) + owner->action_flags |= TIPC_MSG_EVT; + owner->inputq = &l_ptr->inputq; l_ptr->next_out = NULL; l_ptr->unacked_window = 0; l_ptr->checkpoint = 1; @@ -448,13 +477,14 @@ void tipc_link_reset(struct tipc_link *l_ptr) link_reset_statistics(l_ptr); } -void tipc_link_reset_list(unsigned int bearer_id) +void tipc_link_reset_list(struct net *net, unsigned int bearer_id) { + struct tipc_net *tn = net_generic(net, tipc_net_id); struct tipc_link *l_ptr; struct tipc_node *n_ptr; rcu_read_lock(); - list_for_each_entry_rcu(n_ptr, &tipc_node_list, list) { + list_for_each_entry_rcu(n_ptr, &tn->node_list, list) { tipc_node_lock(n_ptr); l_ptr = n_ptr->links[bearer_id]; if (l_ptr) @@ -464,11 +494,14 @@ void tipc_link_reset_list(unsigned int bearer_id) rcu_read_unlock(); } -static void link_activate(struct tipc_link *l_ptr) +static void link_activate(struct tipc_link *link) { - l_ptr->next_in_no = l_ptr->stats.recv_info = 1; - tipc_node_link_up(l_ptr->owner, l_ptr); - tipc_bearer_add_dest(l_ptr->bearer_id, l_ptr->addr); + struct tipc_node *node = link->owner; + + link->next_in_no = 1; + link->stats.recv_info = 1; + tipc_node_link_up(node, link); + tipc_bearer_add_dest(node->net, link->bearer_id, link->addr); } /** @@ -479,7 +512,7 @@ static void link_activate(struct tipc_link *l_ptr) static void link_state_event(struct tipc_link *l_ptr, unsigned int event) { struct tipc_link *other; - u32 cont_intv = l_ptr->continuity_interval; + unsigned long cont_intv = l_ptr->cont_intv; if (l_ptr->flags & LINK_STOPPED) return; @@ -522,8 +555,8 @@ static void link_state_event(struct tipc_link *l_ptr, unsigned int event) link_set_timer(l_ptr, cont_intv / 4); break; case RESET_MSG: - pr_info("%s<%s>, requested by peer\n", link_rst_msg, - l_ptr->name); + pr_debug("%s<%s>, requested by peer\n", + link_rst_msg, l_ptr->name); tipc_link_reset(l_ptr); l_ptr->state = RESET_RESET; l_ptr->fsm_msg_cnt = 0; @@ -533,7 +566,7 @@ static void link_state_event(struct tipc_link *l_ptr, unsigned int event) link_set_timer(l_ptr, cont_intv); break; default: - pr_err("%s%u in WW state\n", link_unk_evt, event); + pr_debug("%s%u in WW state\n", link_unk_evt, event); } break; case WORKING_UNKNOWN: @@ -545,8 +578,8 @@ static void link_state_event(struct tipc_link *l_ptr, unsigned int event) link_set_timer(l_ptr, cont_intv); break; case RESET_MSG: - pr_info("%s<%s>, requested by peer while probing\n", - link_rst_msg, l_ptr->name); + pr_debug("%s<%s>, requested by peer while probing\n", + link_rst_msg, l_ptr->name); tipc_link_reset(l_ptr); l_ptr->state = RESET_RESET; l_ptr->fsm_msg_cnt = 0; @@ -572,8 +605,8 @@ static void link_state_event(struct tipc_link *l_ptr, unsigned int event) l_ptr->fsm_msg_cnt++; link_set_timer(l_ptr, cont_intv / 4); } else { /* Link has failed */ - pr_warn("%s<%s>, peer not responding\n", - link_rst_msg, l_ptr->name); + pr_debug("%s<%s>, peer not responding\n", + link_rst_msg, l_ptr->name); tipc_link_reset(l_ptr); l_ptr->state = RESET_UNKNOWN; l_ptr->fsm_msg_cnt = 0; @@ -614,7 +647,9 @@ static void link_state_event(struct tipc_link *l_ptr, unsigned int event) break; case STARTING_EVT: l_ptr->flags |= LINK_STARTED; - /* fall through */ + l_ptr->fsm_msg_cnt++; + link_set_timer(l_ptr, cont_intv); + break; case TIMEOUT_EVT: tipc_link_proto_xmit(l_ptr, RESET_MSG, 0, 0, 0, 0, 0); l_ptr->fsm_msg_cnt++; @@ -700,7 +735,8 @@ drop: * Only the socket functions tipc_send_stream() and tipc_send_packet() need * to act on the return value, since they may need to do more send attempts. */ -int __tipc_link_xmit(struct tipc_link *link, struct sk_buff_head *list) +int __tipc_link_xmit(struct net *net, struct tipc_link *link, + struct sk_buff_head *list) { struct tipc_msg *msg = buf_msg(skb_peek(list)); uint psz = msg_size(msg); @@ -733,7 +769,8 @@ int __tipc_link_xmit(struct tipc_link *link, struct sk_buff_head *list) if (skb_queue_len(outqueue) < sndlim) { __skb_queue_tail(outqueue, skb); - tipc_bearer_send(link->bearer_id, skb, addr); + tipc_bearer_send(net, link->bearer_id, + skb, addr); link->next_out = NULL; link->unacked_window = 0; } else if (tipc_msg_bundle(outqueue, skb, mtu)) { @@ -758,7 +795,7 @@ int __tipc_link_xmit(struct tipc_link *link, struct sk_buff_head *list) static void skb2list(struct sk_buff *skb, struct sk_buff_head *list) { - __skb_queue_head_init(list); + skb_queue_head_init(list); __skb_queue_tail(list, skb); } @@ -767,19 +804,21 @@ static int __tipc_link_xmit_skb(struct tipc_link *link, struct sk_buff *skb) struct sk_buff_head head; skb2list(skb, &head); - return __tipc_link_xmit(link, &head); + return __tipc_link_xmit(link->owner->net, link, &head); } -int tipc_link_xmit_skb(struct sk_buff *skb, u32 dnode, u32 selector) +int tipc_link_xmit_skb(struct net *net, struct sk_buff *skb, u32 dnode, + u32 selector) { struct sk_buff_head head; skb2list(skb, &head); - return tipc_link_xmit(&head, dnode, selector); + return tipc_link_xmit(net, &head, dnode, selector); } /** * tipc_link_xmit() is the general link level function for message sending + * @net: the applicable net namespace * @list: chain of buffers containing message * @dsz: amount of user data to be sent * @dnode: address of destination node @@ -787,33 +826,28 @@ int tipc_link_xmit_skb(struct sk_buff *skb, u32 dnode, u32 selector) * Consumes the buffer chain, except when returning -ELINKCONG * Returns 0 if success, otherwise errno: -ELINKCONG,-EHOSTUNREACH,-EMSGSIZE */ -int tipc_link_xmit(struct sk_buff_head *list, u32 dnode, u32 selector) +int tipc_link_xmit(struct net *net, struct sk_buff_head *list, u32 dnode, + u32 selector) { struct tipc_link *link = NULL; struct tipc_node *node; int rc = -EHOSTUNREACH; - node = tipc_node_find(dnode); + node = tipc_node_find(net, dnode); if (node) { tipc_node_lock(node); link = node->active_links[selector & 1]; if (link) - rc = __tipc_link_xmit(link, list); + rc = __tipc_link_xmit(net, link, list); tipc_node_unlock(node); } - if (link) return rc; - if (likely(in_own_node(dnode))) { - /* As a node local message chain never contains more than one - * buffer, we just need to dequeue one SKB buffer from the - * head list. - */ - return tipc_sk_rcv(__skb_dequeue(list)); - } - __skb_queue_purge(list); + if (likely(in_own_node(net, dnode))) + return tipc_sk_rcv(net, list); + __skb_queue_purge(list); return rc; } @@ -835,7 +869,8 @@ static void tipc_link_sync_xmit(struct tipc_link *link) return; msg = buf_msg(skb); - tipc_msg_init(msg, BCAST_PROTOCOL, STATE_MSG, INT_H_SIZE, link->addr); + tipc_msg_init(link_own_addr(link), msg, BCAST_PROTOCOL, STATE_MSG, + INT_H_SIZE, link->addr); msg_set_last_bcast(msg, link->owner->bclink.acked); __tipc_link_xmit_skb(link, skb); } @@ -890,7 +925,8 @@ void tipc_link_push_packets(struct tipc_link *l_ptr) msg_set_bcast_ack(msg, l_ptr->owner->bclink.last_in); if (msg_user(msg) == MSG_BUNDLER) TIPC_SKB_CB(skb)->bundling = false; - tipc_bearer_send(l_ptr->bearer_id, skb, + tipc_bearer_send(l_ptr->owner->net, + l_ptr->bearer_id, skb, &l_ptr->media_addr); l_ptr->next_out = tipc_skb_queue_next(outqueue, skb); } else { @@ -923,6 +959,7 @@ static void link_retransmit_failure(struct tipc_link *l_ptr, struct sk_buff *buf) { struct tipc_msg *msg = buf_msg(buf); + struct net *net = l_ptr->owner->net; pr_warn("Retransmission failure on link <%s>\n", l_ptr->name); @@ -940,7 +977,7 @@ static void link_retransmit_failure(struct tipc_link *l_ptr, pr_cont("Outstanding acks: %lu\n", (unsigned long) TIPC_SKB_CB(buf)->handle); - n_ptr = tipc_bclink_retransmit_to(); + n_ptr = tipc_bclink_retransmit_to(net); tipc_node_lock(n_ptr); tipc_addr_string_fill(addr_string, n_ptr->addr); @@ -955,7 +992,7 @@ static void link_retransmit_failure(struct tipc_link *l_ptr, tipc_node_unlock(n_ptr); - tipc_bclink_set_flags(TIPC_BCLINK_RESET); + tipc_bclink_set_flags(net, TIPC_BCLINK_RESET); l_ptr->stale_count = 0; } } @@ -987,7 +1024,8 @@ void tipc_link_retransmit(struct tipc_link *l_ptr, struct sk_buff *skb, msg = buf_msg(skb); msg_set_ack(msg, mod(l_ptr->next_in_no - 1)); msg_set_bcast_ack(msg, l_ptr->owner->bclink.last_in); - tipc_bearer_send(l_ptr->bearer_id, skb, &l_ptr->media_addr); + tipc_bearer_send(l_ptr->owner->net, l_ptr->bearer_id, skb, + &l_ptr->media_addr); retransmits--; l_ptr->stats.retransmitted++; } @@ -1063,14 +1101,16 @@ static int link_recv_buf_validate(struct sk_buff *buf) /** * tipc_rcv - process TIPC packets/messages arriving from off-node + * @net: the applicable net namespace * @skb: TIPC packet * @b_ptr: pointer to bearer message arrived on * * Invoked with no locks held. Bearer pointer must point to a valid bearer * structure (i.e. cannot be NULL), but bearer can be inactive. */ -void tipc_rcv(struct sk_buff *skb, struct tipc_bearer *b_ptr) +void tipc_rcv(struct net *net, struct sk_buff *skb, struct tipc_bearer *b_ptr) { + struct tipc_net *tn = net_generic(net, tipc_net_id); struct sk_buff_head head; struct tipc_node *n_ptr; struct tipc_link *l_ptr; @@ -1096,19 +1136,19 @@ void tipc_rcv(struct sk_buff *skb, struct tipc_bearer *b_ptr) if (unlikely(msg_non_seq(msg))) { if (msg_user(msg) == LINK_CONFIG) - tipc_disc_rcv(skb, b_ptr); + tipc_disc_rcv(net, skb, b_ptr); else - tipc_bclink_rcv(skb); + tipc_bclink_rcv(net, skb); continue; } /* Discard unicast link messages destined for another node */ if (unlikely(!msg_short(msg) && - (msg_destnode(msg) != tipc_own_addr))) + (msg_destnode(msg) != tn->own_addr))) goto discard; /* Locate neighboring node that sent message */ - n_ptr = tipc_node_find(msg_prevnode(msg)); + n_ptr = tipc_node_find(net, msg_prevnode(msg)); if (unlikely(!n_ptr)) goto discard; tipc_node_lock(n_ptr); @@ -1116,7 +1156,7 @@ void tipc_rcv(struct sk_buff *skb, struct tipc_bearer *b_ptr) /* Locate unicast link endpoint that should handle message */ l_ptr = n_ptr->links[b_ptr->identity]; if (unlikely(!l_ptr)) - goto unlock_discard; + goto unlock; /* Verify that communication with node is currently allowed */ if ((n_ptr->action_flags & TIPC_WAIT_PEER_LINKS_DOWN) && @@ -1127,7 +1167,7 @@ void tipc_rcv(struct sk_buff *skb, struct tipc_bearer *b_ptr) n_ptr->action_flags &= ~TIPC_WAIT_PEER_LINKS_DOWN; if (tipc_node_blocked(n_ptr)) - goto unlock_discard; + goto unlock; /* Validate message sequence number info */ seq_no = msg_seqno(msg); @@ -1151,18 +1191,16 @@ void tipc_rcv(struct sk_buff *skb, struct tipc_bearer *b_ptr) if (unlikely(l_ptr->next_out)) tipc_link_push_packets(l_ptr); - if (released && !skb_queue_empty(&l_ptr->waiting_sks)) { + if (released && !skb_queue_empty(&l_ptr->wakeupq)) link_prepare_wakeup(l_ptr); - l_ptr->owner->action_flags |= TIPC_WAKEUP_USERS; - } /* Process the incoming packet */ if (unlikely(!link_working_working(l_ptr))) { if (msg_user(msg) == LINK_PROTOCOL) { tipc_link_proto_rcv(l_ptr, skb); link_retrieve_defq(l_ptr, &head); - tipc_node_unlock(n_ptr); - continue; + skb = NULL; + goto unlock; } /* Traffic message. Conditionally activate link */ @@ -1171,18 +1209,18 @@ void tipc_rcv(struct sk_buff *skb, struct tipc_bearer *b_ptr) if (link_working_working(l_ptr)) { /* Re-insert buffer in front of queue */ __skb_queue_head(&head, skb); - tipc_node_unlock(n_ptr); - continue; + skb = NULL; + goto unlock; } - goto unlock_discard; + goto unlock; } /* Link is now in state WORKING_WORKING */ if (unlikely(seq_no != mod(l_ptr->next_in_no))) { link_handle_out_of_seq_msg(l_ptr, skb); link_retrieve_defq(l_ptr, &head); - tipc_node_unlock(n_ptr); - continue; + skb = NULL; + goto unlock; } l_ptr->next_in_no++; if (unlikely(!skb_queue_empty(&l_ptr->deferred_queue))) @@ -1192,95 +1230,102 @@ void tipc_rcv(struct sk_buff *skb, struct tipc_bearer *b_ptr) l_ptr->stats.sent_acks++; tipc_link_proto_xmit(l_ptr, STATE_MSG, 0, 0, 0, 0, 0); } - - if (tipc_link_prepare_input(l_ptr, &skb)) { - tipc_node_unlock(n_ptr); - continue; - } - tipc_node_unlock(n_ptr); - - if (tipc_link_input(l_ptr, skb) != 0) - goto discard; - continue; -unlock_discard: + tipc_link_input(l_ptr, skb); + skb = NULL; +unlock: tipc_node_unlock(n_ptr); discard: - kfree_skb(skb); + if (unlikely(skb)) + kfree_skb(skb); } } -/** - * tipc_link_prepare_input - process TIPC link messages - * - * returns nonzero if the message was consumed +/* tipc_data_input - deliver data and name distr msgs to upper layer * + * Consumes buffer if message is of right type * Node lock must be held */ -static int tipc_link_prepare_input(struct tipc_link *l, struct sk_buff **buf) +static bool tipc_data_input(struct tipc_link *link, struct sk_buff *skb) { - struct tipc_node *n; - struct tipc_msg *msg; - int res = -EINVAL; + struct tipc_node *node = link->owner; + struct tipc_msg *msg = buf_msg(skb); + u32 dport = msg_destport(msg); - n = l->owner; - msg = buf_msg(*buf); switch (msg_user(msg)) { - case CHANGEOVER_PROTOCOL: - if (tipc_link_tunnel_rcv(n, buf)) - res = 0; - break; - case MSG_FRAGMENTER: - l->stats.recv_fragments++; - if (tipc_buf_append(&l->reasm_buf, buf)) { - l->stats.recv_fragmented++; - res = 0; - } else if (!l->reasm_buf) { - tipc_link_reset(l); + case TIPC_LOW_IMPORTANCE: + case TIPC_MEDIUM_IMPORTANCE: + case TIPC_HIGH_IMPORTANCE: + case TIPC_CRITICAL_IMPORTANCE: + case CONN_MANAGER: + if (tipc_skb_queue_tail(&link->inputq, skb, dport)) { + node->inputq = &link->inputq; + node->action_flags |= TIPC_MSG_EVT; } - break; - case MSG_BUNDLER: - l->stats.recv_bundles++; - l->stats.recv_bundled += msg_msgcnt(msg); - res = 0; - break; + return true; case NAME_DISTRIBUTOR: - n->bclink.recv_permitted = true; - res = 0; - break; + node->bclink.recv_permitted = true; + node->namedq = &link->namedq; + skb_queue_tail(&link->namedq, skb); + if (skb_queue_len(&link->namedq) == 1) + node->action_flags |= TIPC_NAMED_MSG_EVT; + return true; + case MSG_BUNDLER: + case CHANGEOVER_PROTOCOL: + case MSG_FRAGMENTER: case BCAST_PROTOCOL: - tipc_link_sync_rcv(n, *buf); - break; + return false; default: - res = 0; - } - return res; + pr_warn("Dropping received illegal msg type\n"); + kfree_skb(skb); + return false; + }; } -/** - * tipc_link_input - Deliver message too higher layers + +/* tipc_link_input - process packet that has passed link protocol check + * + * Consumes buffer + * Node lock must be held */ -static int tipc_link_input(struct tipc_link *l, struct sk_buff *buf) +static void tipc_link_input(struct tipc_link *link, struct sk_buff *skb) { - struct tipc_msg *msg = buf_msg(buf); - int res = 0; + struct tipc_node *node = link->owner; + struct tipc_msg *msg = buf_msg(skb); + struct sk_buff *iskb; + int pos = 0; + + if (likely(tipc_data_input(link, skb))) + return; switch (msg_user(msg)) { - case TIPC_LOW_IMPORTANCE: - case TIPC_MEDIUM_IMPORTANCE: - case TIPC_HIGH_IMPORTANCE: - case TIPC_CRITICAL_IMPORTANCE: - case CONN_MANAGER: - tipc_sk_rcv(buf); + case CHANGEOVER_PROTOCOL: + if (!tipc_link_tunnel_rcv(node, &skb)) + break; + if (msg_user(buf_msg(skb)) != MSG_BUNDLER) { + tipc_data_input(link, skb); + break; + } + case MSG_BUNDLER: + link->stats.recv_bundles++; + link->stats.recv_bundled += msg_msgcnt(msg); + + while (tipc_msg_extract(skb, &iskb, &pos)) + tipc_data_input(link, iskb); break; - case NAME_DISTRIBUTOR: - tipc_named_rcv(buf); + case MSG_FRAGMENTER: + link->stats.recv_fragments++; + if (tipc_buf_append(&link->reasm_buf, &skb)) { + link->stats.recv_fragmented++; + tipc_data_input(link, skb); + } else if (!link->reasm_buf) { + tipc_link_reset(link); + } break; - case MSG_BUNDLER: - tipc_link_bundle_rcv(buf); + case BCAST_PROTOCOL: + tipc_link_sync_rcv(node, skb); break; default: - res = -EINVAL; - } - return res; + break; + }; } /** @@ -1381,7 +1426,7 @@ void tipc_link_proto_xmit(struct tipc_link *l_ptr, u32 msg_typ, int probe_msg, msg_set_type(msg, msg_typ); msg_set_net_plane(msg, l_ptr->net_plane); msg_set_bcast_ack(msg, l_ptr->owner->bclink.last_in); - msg_set_last_bcast(msg, tipc_bclink_get_last_sent()); + msg_set_last_bcast(msg, tipc_bclink_get_last_sent(l_ptr->owner->net)); if (msg_typ == STATE_MSG) { u32 next_sent = mod(l_ptr->next_out_no); @@ -1445,7 +1490,8 @@ void tipc_link_proto_xmit(struct tipc_link *l_ptr, u32 msg_typ, int probe_msg, skb_copy_to_linear_data(buf, msg, sizeof(l_ptr->proto_msg)); buf->priority = TC_PRIO_CONTROL; - tipc_bearer_send(l_ptr->bearer_id, buf, &l_ptr->media_addr); + tipc_bearer_send(l_ptr->owner->net, l_ptr->bearer_id, buf, + &l_ptr->media_addr); l_ptr->unacked_window = 0; kfree_skb(buf); } @@ -1455,7 +1501,8 @@ void tipc_link_proto_xmit(struct tipc_link *l_ptr, u32 msg_typ, int probe_msg, * Note that network plane id propagates through the network, and may * change at any time. The node with lowest address rules */ -static void tipc_link_proto_rcv(struct tipc_link *l_ptr, struct sk_buff *buf) +static void tipc_link_proto_rcv(struct tipc_link *l_ptr, + struct sk_buff *buf) { u32 rec_gap = 0; u32 max_pkt_info; @@ -1468,7 +1515,7 @@ static void tipc_link_proto_rcv(struct tipc_link *l_ptr, struct sk_buff *buf) goto exit; if (l_ptr->net_plane != msg_net_plane(msg)) - if (tipc_own_addr > msg_prevnode(msg)) + if (link_own_addr(l_ptr) > msg_prevnode(msg)) l_ptr->net_plane = msg_net_plane(msg); switch (msg_type(msg)) { @@ -1535,9 +1582,9 @@ static void tipc_link_proto_rcv(struct tipc_link *l_ptr, struct sk_buff *buf) if (msg_linkprio(msg) && (msg_linkprio(msg) != l_ptr->priority)) { - pr_warn("%s<%s>, priority change %u->%u\n", - link_rst_msg, l_ptr->name, l_ptr->priority, - msg_linkprio(msg)); + pr_debug("%s<%s>, priority change %u->%u\n", + link_rst_msg, l_ptr->name, + l_ptr->priority, msg_linkprio(msg)); l_ptr->priority = msg_linkprio(msg); tipc_link_reset(l_ptr); /* Enforce change to take effect */ break; @@ -1636,8 +1683,8 @@ void tipc_link_failover_send_queue(struct tipc_link *l_ptr) if (!tunnel) return; - tipc_msg_init(&tunnel_hdr, CHANGEOVER_PROTOCOL, - ORIGINAL_MSG, INT_H_SIZE, l_ptr->addr); + tipc_msg_init(link_own_addr(l_ptr), &tunnel_hdr, CHANGEOVER_PROTOCOL, + ORIGINAL_MSG, INT_H_SIZE, l_ptr->addr); msg_set_bearer_id(&tunnel_hdr, l_ptr->peer_bearer_id); msg_set_msgcnt(&tunnel_hdr, msgcount); @@ -1694,8 +1741,8 @@ void tipc_link_dup_queue_xmit(struct tipc_link *l_ptr, struct sk_buff *skb; struct tipc_msg tunnel_hdr; - tipc_msg_init(&tunnel_hdr, CHANGEOVER_PROTOCOL, - DUPLICATE_MSG, INT_H_SIZE, l_ptr->addr); + tipc_msg_init(link_own_addr(l_ptr), &tunnel_hdr, CHANGEOVER_PROTOCOL, + DUPLICATE_MSG, INT_H_SIZE, l_ptr->addr); msg_set_msgcnt(&tunnel_hdr, skb_queue_len(&l_ptr->outqueue)); msg_set_bearer_id(&tunnel_hdr, l_ptr->peer_bearer_id); skb_queue_walk(&l_ptr->outqueue, skb) { @@ -1729,7 +1776,7 @@ void tipc_link_dup_queue_xmit(struct tipc_link *l_ptr, * @from_pos: offset to extract from * * Returns a new message buffer containing an embedded message. The - * encapsulating message itself is left unchanged. + * encapsulating buffer is left unchanged. */ static struct sk_buff *buf_extract(struct sk_buff *skb, u32 from_pos) { @@ -1743,8 +1790,6 @@ static struct sk_buff *buf_extract(struct sk_buff *skb, u32 from_pos) return eb; } - - /* tipc_link_dup_rcv(): Receive a tunnelled DUPLICATE_MSG packet. * Owner node is locked. */ @@ -1804,10 +1849,8 @@ static struct sk_buff *tipc_link_failover_rcv(struct tipc_link *l_ptr, } } exit: - if ((l_ptr->exp_msg_count == 0) && (l_ptr->flags & LINK_STOPPED)) { - tipc_node_detach_link(l_ptr->owner, l_ptr); - kfree(l_ptr); - } + if ((!l_ptr->exp_msg_count) && (l_ptr->flags & LINK_STOPPED)) + tipc_link_delete(l_ptr); return buf; } @@ -1845,50 +1888,16 @@ exit: return *buf != NULL; } -/* - * Bundler functionality: - */ -void tipc_link_bundle_rcv(struct sk_buff *buf) +static void link_set_supervision_props(struct tipc_link *l_ptr, u32 tol) { - u32 msgcount = msg_msgcnt(buf_msg(buf)); - u32 pos = INT_H_SIZE; - struct sk_buff *obuf; - struct tipc_msg *omsg; - - while (msgcount--) { - obuf = buf_extract(buf, pos); - if (obuf == NULL) { - pr_warn("Link unable to unbundle message(s)\n"); - break; - } - omsg = buf_msg(obuf); - pos += align(msg_size(omsg)); - if (msg_isdata(omsg)) { - if (unlikely(msg_type(omsg) == TIPC_MCAST_MSG)) - tipc_sk_mcast_rcv(obuf); - else - tipc_sk_rcv(obuf); - } else if (msg_user(omsg) == CONN_MANAGER) { - tipc_sk_rcv(obuf); - } else if (msg_user(omsg) == NAME_DISTRIBUTOR) { - tipc_named_rcv(obuf); - } else { - pr_warn("Illegal bundled msg: %u\n", msg_user(omsg)); - kfree_skb(obuf); - } - } - kfree_skb(buf); -} + unsigned long intv = ((tol / 4) > 500) ? 500 : tol / 4; -static void link_set_supervision_props(struct tipc_link *l_ptr, u32 tolerance) -{ - if ((tolerance < TIPC_MIN_LINK_TOL) || (tolerance > TIPC_MAX_LINK_TOL)) + if ((tol < TIPC_MIN_LINK_TOL) || (tol > TIPC_MAX_LINK_TOL)) return; - l_ptr->tolerance = tolerance; - l_ptr->continuity_interval = - ((tolerance / 4) > 500) ? 500 : tolerance / 4; - l_ptr->abort_limit = tolerance / (l_ptr->continuity_interval / 4); + l_ptr->tolerance = tol; + l_ptr->cont_intv = msecs_to_jiffies(intv); + l_ptr->abort_limit = tol / (jiffies_to_msecs(l_ptr->cont_intv) / 4); } void tipc_link_set_queue_limits(struct tipc_link *l_ptr, u32 window) @@ -1911,22 +1920,25 @@ void tipc_link_set_queue_limits(struct tipc_link *l_ptr, u32 window) } /* tipc_link_find_owner - locate owner node of link by link's name + * @net: the applicable net namespace * @name: pointer to link name string * @bearer_id: pointer to index in 'node->links' array where the link was found. * * Returns pointer to node owning the link, or 0 if no matching link is found. */ -static struct tipc_node *tipc_link_find_owner(const char *link_name, +static struct tipc_node *tipc_link_find_owner(struct net *net, + const char *link_name, unsigned int *bearer_id) { + struct tipc_net *tn = net_generic(net, tipc_net_id); struct tipc_link *l_ptr; struct tipc_node *n_ptr; - struct tipc_node *found_node = 0; + struct tipc_node *found_node = NULL; int i; *bearer_id = 0; rcu_read_lock(); - list_for_each_entry_rcu(n_ptr, &tipc_node_list, list) { + list_for_each_entry_rcu(n_ptr, &tn->node_list, list) { tipc_node_lock(n_ptr); for (i = 0; i < MAX_BEARERS; i++) { l_ptr = n_ptr->links[i]; @@ -1946,148 +1958,6 @@ static struct tipc_node *tipc_link_find_owner(const char *link_name, } /** - * link_value_is_valid -- validate proposed link tolerance/priority/window - * - * @cmd: value type (TIPC_CMD_SET_LINK_*) - * @new_value: the new value - * - * Returns 1 if value is within range, 0 if not. - */ -static int link_value_is_valid(u16 cmd, u32 new_value) -{ - switch (cmd) { - case TIPC_CMD_SET_LINK_TOL: - return (new_value >= TIPC_MIN_LINK_TOL) && - (new_value <= TIPC_MAX_LINK_TOL); - case TIPC_CMD_SET_LINK_PRI: - return (new_value <= TIPC_MAX_LINK_PRI); - case TIPC_CMD_SET_LINK_WINDOW: - return (new_value >= TIPC_MIN_LINK_WIN) && - (new_value <= TIPC_MAX_LINK_WIN); - } - return 0; -} - -/** - * link_cmd_set_value - change priority/tolerance/window for link/bearer/media - * @name: ptr to link, bearer, or media name - * @new_value: new value of link, bearer, or media setting - * @cmd: which link, bearer, or media attribute to set (TIPC_CMD_SET_LINK_*) - * - * Caller must hold RTNL lock to ensure link/bearer/media is not deleted. - * - * Returns 0 if value updated and negative value on error. - */ -static int link_cmd_set_value(const char *name, u32 new_value, u16 cmd) -{ - struct tipc_node *node; - struct tipc_link *l_ptr; - struct tipc_bearer *b_ptr; - struct tipc_media *m_ptr; - int bearer_id; - int res = 0; - - node = tipc_link_find_owner(name, &bearer_id); - if (node) { - tipc_node_lock(node); - l_ptr = node->links[bearer_id]; - - if (l_ptr) { - switch (cmd) { - case TIPC_CMD_SET_LINK_TOL: - link_set_supervision_props(l_ptr, new_value); - tipc_link_proto_xmit(l_ptr, STATE_MSG, 0, 0, - new_value, 0, 0); - break; - case TIPC_CMD_SET_LINK_PRI: - l_ptr->priority = new_value; - tipc_link_proto_xmit(l_ptr, STATE_MSG, 0, 0, - 0, new_value, 0); - break; - case TIPC_CMD_SET_LINK_WINDOW: - tipc_link_set_queue_limits(l_ptr, new_value); - break; - default: - res = -EINVAL; - break; - } - } - tipc_node_unlock(node); - return res; - } - - b_ptr = tipc_bearer_find(name); - if (b_ptr) { - switch (cmd) { - case TIPC_CMD_SET_LINK_TOL: - b_ptr->tolerance = new_value; - break; - case TIPC_CMD_SET_LINK_PRI: - b_ptr->priority = new_value; - break; - case TIPC_CMD_SET_LINK_WINDOW: - b_ptr->window = new_value; - break; - default: - res = -EINVAL; - break; - } - return res; - } - - m_ptr = tipc_media_find(name); - if (!m_ptr) - return -ENODEV; - switch (cmd) { - case TIPC_CMD_SET_LINK_TOL: - m_ptr->tolerance = new_value; - break; - case TIPC_CMD_SET_LINK_PRI: - m_ptr->priority = new_value; - break; - case TIPC_CMD_SET_LINK_WINDOW: - m_ptr->window = new_value; - break; - default: - res = -EINVAL; - break; - } - return res; -} - -struct sk_buff *tipc_link_cmd_config(const void *req_tlv_area, int req_tlv_space, - u16 cmd) -{ - struct tipc_link_config *args; - u32 new_value; - int res; - - if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_LINK_CONFIG)) - return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); - - args = (struct tipc_link_config *)TLV_DATA(req_tlv_area); - new_value = ntohl(args->value); - - if (!link_value_is_valid(cmd, new_value)) - return tipc_cfg_reply_error_string( - "cannot change, value invalid"); - - if (!strcmp(args->name, tipc_bclink_name)) { - if ((cmd == TIPC_CMD_SET_LINK_WINDOW) && - (tipc_bclink_set_queue_limits(new_value) == 0)) - return tipc_cfg_reply_none(); - return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED - " (cannot change setting on broadcast link)"); - } - - res = link_cmd_set_value(args->name, new_value, cmd); - if (res) - return tipc_cfg_reply_error_string("cannot change link setting"); - - return tipc_cfg_reply_none(); -} - -/** * link_reset_statistics - reset link statistics * @l_ptr: pointer to link */ @@ -2098,207 +1968,13 @@ static void link_reset_statistics(struct tipc_link *l_ptr) l_ptr->stats.recv_info = l_ptr->next_in_no; } -struct sk_buff *tipc_link_cmd_reset_stats(const void *req_tlv_area, int req_tlv_space) -{ - char *link_name; - struct tipc_link *l_ptr; - struct tipc_node *node; - unsigned int bearer_id; - - if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_LINK_NAME)) - return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); - - link_name = (char *)TLV_DATA(req_tlv_area); - if (!strcmp(link_name, tipc_bclink_name)) { - if (tipc_bclink_reset_stats()) - return tipc_cfg_reply_error_string("link not found"); - return tipc_cfg_reply_none(); - } - node = tipc_link_find_owner(link_name, &bearer_id); - if (!node) - return tipc_cfg_reply_error_string("link not found"); - - tipc_node_lock(node); - l_ptr = node->links[bearer_id]; - if (!l_ptr) { - tipc_node_unlock(node); - return tipc_cfg_reply_error_string("link not found"); - } - link_reset_statistics(l_ptr); - tipc_node_unlock(node); - return tipc_cfg_reply_none(); -} - -/** - * percent - convert count to a percentage of total (rounding up or down) - */ -static u32 percent(u32 count, u32 total) -{ - return (count * 100 + (total / 2)) / total; -} - -/** - * tipc_link_stats - print link statistics - * @name: link name - * @buf: print buffer area - * @buf_size: size of print buffer area - * - * Returns length of print buffer data string (or 0 if error) - */ -static int tipc_link_stats(const char *name, char *buf, const u32 buf_size) -{ - struct tipc_link *l; - struct tipc_stats *s; - struct tipc_node *node; - char *status; - u32 profile_total = 0; - unsigned int bearer_id; - int ret; - - if (!strcmp(name, tipc_bclink_name)) - return tipc_bclink_stats(buf, buf_size); - - node = tipc_link_find_owner(name, &bearer_id); - if (!node) - return 0; - - tipc_node_lock(node); - - l = node->links[bearer_id]; - if (!l) { - tipc_node_unlock(node); - return 0; - } - - s = &l->stats; - - if (tipc_link_is_active(l)) - status = "ACTIVE"; - else if (tipc_link_is_up(l)) - status = "STANDBY"; - else - status = "DEFUNCT"; - - ret = tipc_snprintf(buf, buf_size, "Link <%s>\n" - " %s MTU:%u Priority:%u Tolerance:%u ms" - " Window:%u packets\n", - l->name, status, l->max_pkt, l->priority, - l->tolerance, l->queue_limit[0]); - - ret += tipc_snprintf(buf + ret, buf_size - ret, - " RX packets:%u fragments:%u/%u bundles:%u/%u\n", - l->next_in_no - s->recv_info, s->recv_fragments, - s->recv_fragmented, s->recv_bundles, - s->recv_bundled); - - ret += tipc_snprintf(buf + ret, buf_size - ret, - " TX packets:%u fragments:%u/%u bundles:%u/%u\n", - l->next_out_no - s->sent_info, s->sent_fragments, - s->sent_fragmented, s->sent_bundles, - s->sent_bundled); - - profile_total = s->msg_length_counts; - if (!profile_total) - profile_total = 1; - - ret += tipc_snprintf(buf + ret, buf_size - ret, - " TX profile sample:%u packets average:%u octets\n" - " 0-64:%u%% -256:%u%% -1024:%u%% -4096:%u%% " - "-16384:%u%% -32768:%u%% -66000:%u%%\n", - s->msg_length_counts, - s->msg_lengths_total / profile_total, - percent(s->msg_length_profile[0], profile_total), - percent(s->msg_length_profile[1], profile_total), - percent(s->msg_length_profile[2], profile_total), - percent(s->msg_length_profile[3], profile_total), - percent(s->msg_length_profile[4], profile_total), - percent(s->msg_length_profile[5], profile_total), - percent(s->msg_length_profile[6], profile_total)); - - ret += tipc_snprintf(buf + ret, buf_size - ret, - " RX states:%u probes:%u naks:%u defs:%u" - " dups:%u\n", s->recv_states, s->recv_probes, - s->recv_nacks, s->deferred_recv, s->duplicates); - - ret += tipc_snprintf(buf + ret, buf_size - ret, - " TX states:%u probes:%u naks:%u acks:%u" - " dups:%u\n", s->sent_states, s->sent_probes, - s->sent_nacks, s->sent_acks, s->retransmitted); - - ret += tipc_snprintf(buf + ret, buf_size - ret, - " Congestion link:%u Send queue" - " max:%u avg:%u\n", s->link_congs, - s->max_queue_sz, s->queue_sz_counts ? - (s->accu_queue_sz / s->queue_sz_counts) : 0); - - tipc_node_unlock(node); - return ret; -} - -struct sk_buff *tipc_link_cmd_show_stats(const void *req_tlv_area, int req_tlv_space) -{ - struct sk_buff *buf; - struct tlv_desc *rep_tlv; - int str_len; - int pb_len; - char *pb; - - if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_LINK_NAME)) - return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); - - buf = tipc_cfg_reply_alloc(TLV_SPACE(ULTRA_STRING_MAX_LEN)); - if (!buf) - return NULL; - - rep_tlv = (struct tlv_desc *)buf->data; - pb = TLV_DATA(rep_tlv); - pb_len = ULTRA_STRING_MAX_LEN; - str_len = tipc_link_stats((char *)TLV_DATA(req_tlv_area), - pb, pb_len); - if (!str_len) { - kfree_skb(buf); - return tipc_cfg_reply_error_string("link not found"); - } - str_len += 1; /* for "\0" */ - skb_put(buf, TLV_SPACE(str_len)); - TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len); - - return buf; -} - -/** - * tipc_link_get_max_pkt - get maximum packet size to use when sending to destination - * @dest: network address of destination node - * @selector: used to select from set of active links - * - * If no active link can be found, uses default maximum packet size. - */ -u32 tipc_link_get_max_pkt(u32 dest, u32 selector) -{ - struct tipc_node *n_ptr; - struct tipc_link *l_ptr; - u32 res = MAX_PKT_DEFAULT; - - if (dest == tipc_own_addr) - return MAX_MSG_SIZE; - - n_ptr = tipc_node_find(dest); - if (n_ptr) { - tipc_node_lock(n_ptr); - l_ptr = n_ptr->active_links[selector & 1]; - if (l_ptr) - res = l_ptr->max_pkt; - tipc_node_unlock(n_ptr); - } - return res; -} - static void link_print(struct tipc_link *l_ptr, const char *str) { + struct tipc_net *tn = net_generic(l_ptr->owner->net, tipc_net_id); struct tipc_bearer *b_ptr; rcu_read_lock(); - b_ptr = rcu_dereference_rtnl(bearer_list[l_ptr->bearer_id]); + b_ptr = rcu_dereference_rtnl(tn->bearer_list[l_ptr->bearer_id]); if (b_ptr) pr_info("%s Link %x<%s>:", str, l_ptr->addr, b_ptr->name); rcu_read_unlock(); @@ -2362,6 +2038,7 @@ int tipc_nl_link_set(struct sk_buff *skb, struct genl_info *info) struct tipc_link *link; struct tipc_node *node; struct nlattr *attrs[TIPC_NLA_LINK_MAX + 1]; + struct net *net = sock_net(skb->sk); if (!info->attrs[TIPC_NLA_LINK]) return -EINVAL; @@ -2377,7 +2054,7 @@ int tipc_nl_link_set(struct sk_buff *skb, struct genl_info *info) name = nla_data(attrs[TIPC_NLA_LINK_NAME]); - node = tipc_link_find_owner(name, &bearer_id); + node = tipc_link_find_owner(net, name, &bearer_id); if (!node) return -EINVAL; @@ -2493,14 +2170,16 @@ msg_full: } /* Caller should hold appropriate locks to protect the link */ -static int __tipc_nl_add_link(struct tipc_nl_msg *msg, struct tipc_link *link) +static int __tipc_nl_add_link(struct net *net, struct tipc_nl_msg *msg, + struct tipc_link *link) { int err; void *hdr; struct nlattr *attrs; struct nlattr *prop; + struct tipc_net *tn = net_generic(net, tipc_net_id); - hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_v2_family, + hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, NLM_F_MULTI, TIPC_NL_LINK_GET); if (!hdr) return -EMSGSIZE; @@ -2512,7 +2191,7 @@ static int __tipc_nl_add_link(struct tipc_nl_msg *msg, struct tipc_link *link) if (nla_put_string(msg->skb, TIPC_NLA_LINK_NAME, link->name)) goto attr_msg_full; if (nla_put_u32(msg->skb, TIPC_NLA_LINK_DEST, - tipc_cluster_mask(tipc_own_addr))) + tipc_cluster_mask(tn->own_addr))) goto attr_msg_full; if (nla_put_u32(msg->skb, TIPC_NLA_LINK_MTU, link->max_pkt)) goto attr_msg_full; @@ -2562,9 +2241,8 @@ msg_full: } /* Caller should hold node lock */ -static int __tipc_nl_add_node_links(struct tipc_nl_msg *msg, - struct tipc_node *node, - u32 *prev_link) +static int __tipc_nl_add_node_links(struct net *net, struct tipc_nl_msg *msg, + struct tipc_node *node, u32 *prev_link) { u32 i; int err; @@ -2575,7 +2253,7 @@ static int __tipc_nl_add_node_links(struct tipc_nl_msg *msg, if (!node->links[i]) continue; - err = __tipc_nl_add_link(msg, node->links[i]); + err = __tipc_nl_add_link(net, msg, node->links[i]); if (err) return err; } @@ -2586,6 +2264,8 @@ static int __tipc_nl_add_node_links(struct tipc_nl_msg *msg, int tipc_nl_link_dump(struct sk_buff *skb, struct netlink_callback *cb) { + struct net *net = sock_net(skb->sk); + struct tipc_net *tn = net_generic(net, tipc_net_id); struct tipc_node *node; struct tipc_nl_msg msg; u32 prev_node = cb->args[0]; @@ -2603,7 +2283,7 @@ int tipc_nl_link_dump(struct sk_buff *skb, struct netlink_callback *cb) rcu_read_lock(); if (prev_node) { - node = tipc_node_find(prev_node); + node = tipc_node_find(net, prev_node); if (!node) { /* We never set seq or call nl_dump_check_consistent() * this means that setting prev_seq here will cause the @@ -2615,9 +2295,11 @@ int tipc_nl_link_dump(struct sk_buff *skb, struct netlink_callback *cb) goto out; } - list_for_each_entry_continue_rcu(node, &tipc_node_list, list) { + list_for_each_entry_continue_rcu(node, &tn->node_list, + list) { tipc_node_lock(node); - err = __tipc_nl_add_node_links(&msg, node, &prev_link); + err = __tipc_nl_add_node_links(net, &msg, node, + &prev_link); tipc_node_unlock(node); if (err) goto out; @@ -2625,13 +2307,14 @@ int tipc_nl_link_dump(struct sk_buff *skb, struct netlink_callback *cb) prev_node = node->addr; } } else { - err = tipc_nl_add_bc_link(&msg); + err = tipc_nl_add_bc_link(net, &msg); if (err) goto out; - list_for_each_entry_rcu(node, &tipc_node_list, list) { + list_for_each_entry_rcu(node, &tn->node_list, list) { tipc_node_lock(node); - err = __tipc_nl_add_node_links(&msg, node, &prev_link); + err = __tipc_nl_add_node_links(net, &msg, node, + &prev_link); tipc_node_unlock(node); if (err) goto out; @@ -2652,6 +2335,7 @@ out: int tipc_nl_link_get(struct sk_buff *skb, struct genl_info *info) { + struct net *net = genl_info_net(info); struct sk_buff *ans_skb; struct tipc_nl_msg msg; struct tipc_link *link; @@ -2664,7 +2348,7 @@ int tipc_nl_link_get(struct sk_buff *skb, struct genl_info *info) return -EINVAL; name = nla_data(info->attrs[TIPC_NLA_LINK_NAME]); - node = tipc_link_find_owner(name, &bearer_id); + node = tipc_link_find_owner(net, name, &bearer_id); if (!node) return -EINVAL; @@ -2683,7 +2367,7 @@ int tipc_nl_link_get(struct sk_buff *skb, struct genl_info *info) goto err_out; } - err = __tipc_nl_add_link(&msg, link); + err = __tipc_nl_add_link(net, &msg, link); if (err) goto err_out; @@ -2706,6 +2390,7 @@ int tipc_nl_link_reset_stats(struct sk_buff *skb, struct genl_info *info) struct tipc_link *link; struct tipc_node *node; struct nlattr *attrs[TIPC_NLA_LINK_MAX + 1]; + struct net *net = sock_net(skb->sk); if (!info->attrs[TIPC_NLA_LINK]) return -EINVAL; @@ -2722,13 +2407,13 @@ int tipc_nl_link_reset_stats(struct sk_buff *skb, struct genl_info *info) link_name = nla_data(attrs[TIPC_NLA_LINK_NAME]); if (strcmp(link_name, tipc_bclink_name) == 0) { - err = tipc_bclink_reset_stats(); + err = tipc_bclink_reset_stats(net); if (err) return err; return 0; } - node = tipc_link_find_owner(link_name, &bearer_id); + node = tipc_link_find_owner(net, link_name, &bearer_id); if (!node) return -EINVAL; |