diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/tipc/bcast.c | 105 | ||||
| -rw-r--r-- | net/tipc/bcast.h | 3 | ||||
| -rw-r--r-- | net/tipc/link.c | 8 | ||||
| -rw-r--r-- | net/tipc/msg.c | 17 | ||||
| -rw-r--r-- | net/tipc/msg.h | 9 | ||||
| -rw-r--r-- | net/tipc/node.c | 27 | ||||
| -rw-r--r-- | net/tipc/socket.c | 27 |
7 files changed, 149 insertions, 47 deletions
diff --git a/net/tipc/bcast.c b/net/tipc/bcast.c index 412d3351abb7..672e6ef93cab 100644 --- a/net/tipc/bcast.c +++ b/net/tipc/bcast.c @@ -70,7 +70,7 @@ static struct tipc_bc_base *tipc_bc_base(struct net *net) int tipc_bcast_get_mtu(struct net *net) { - return tipc_link_mtu(tipc_bc_sndlink(net)); + return tipc_link_mtu(tipc_bc_sndlink(net)) - INT_H_SIZE; } /* tipc_bcbase_select_primary(): find a bearer with links to all destinations, @@ -175,42 +175,101 @@ static void tipc_bcbase_xmit(struct net *net, struct sk_buff_head *xmitq) __skb_queue_purge(&_xmitq); } -/* tipc_bcast_xmit - deliver buffer chain to all nodes in cluster - * and to identified node local sockets +/* tipc_bcast_xmit - broadcast the buffer chain to all external nodes * @net: the applicable net namespace - * @list: chain of buffers containing message + * @pkts: chain of buffers containing message + * @cong_link_cnt: set to 1 if broadcast link is congested, otherwise 0 * Consumes the buffer chain. - * Returns 0 if success, otherwise errno: -ELINKCONG,-EHOSTUNREACH,-EMSGSIZE + * Returns 0 if success, otherwise errno: -EHOSTUNREACH,-EMSGSIZE */ -int tipc_bcast_xmit(struct net *net, struct sk_buff_head *list) +static int tipc_bcast_xmit(struct net *net, struct sk_buff_head *pkts, + u16 *cong_link_cnt) { struct tipc_link *l = tipc_bc_sndlink(net); - struct sk_buff_head xmitq, inputq, rcvq; + struct sk_buff_head xmitq; int rc = 0; - __skb_queue_head_init(&rcvq); __skb_queue_head_init(&xmitq); - skb_queue_head_init(&inputq); - - /* Prepare message clone for local node */ - if (unlikely(!tipc_msg_reassemble(list, &rcvq))) - return -EHOSTUNREACH; - tipc_bcast_lock(net); if (tipc_link_bc_peers(l)) - rc = tipc_link_xmit(l, list, &xmitq); + rc = tipc_link_xmit(l, pkts, &xmitq); tipc_bcast_unlock(net); + tipc_bcbase_xmit(net, &xmitq); + __skb_queue_purge(pkts); + if (rc == -ELINKCONG) { + *cong_link_cnt = 1; + rc = 0; + } + return rc; +} - /* Don't send to local node if adding to link failed */ - if (unlikely(rc && (rc != -ELINKCONG))) { - __skb_queue_purge(&rcvq); - return rc; +/* tipc_rcast_xmit - replicate and send a message to given destination nodes + * @net: the applicable net namespace + * @pkts: chain of buffers containing message + * @dests: list of destination nodes + * @cong_link_cnt: returns number of congested links + * @cong_links: returns identities of congested links + * Returns 0 if success, otherwise errno + */ +static int tipc_rcast_xmit(struct net *net, struct sk_buff_head *pkts, + struct tipc_nlist *dests, u16 *cong_link_cnt) +{ + struct sk_buff_head _pkts; + struct u32_item *n, *tmp; + u32 dst, selector; + + selector = msg_link_selector(buf_msg(skb_peek(pkts))); + __skb_queue_head_init(&_pkts); + + list_for_each_entry_safe(n, tmp, &dests->list, list) { + dst = n->value; + if (!tipc_msg_pskb_copy(dst, pkts, &_pkts)) + return -ENOMEM; + + /* Any other return value than -ELINKCONG is ignored */ + if (tipc_node_xmit(net, &_pkts, dst, selector) == -ELINKCONG) + (*cong_link_cnt)++; } + return 0; +} - /* Broadcast to all nodes, inluding local node */ - tipc_bcbase_xmit(net, &xmitq); - tipc_sk_mcast_rcv(net, &rcvq, &inputq); - __skb_queue_purge(list); +/* tipc_mcast_xmit - deliver message to indicated destination nodes + * and to identified node local sockets + * @net: the applicable net namespace + * @pkts: chain of buffers containing message + * @dests: destination nodes for message. Not consumed. + * @cong_link_cnt: returns number of encountered congested destination links + * @cong_links: returns identities of congested links + * Consumes buffer chain. + * Returns 0 if success, otherwise errno + */ +int tipc_mcast_xmit(struct net *net, struct sk_buff_head *pkts, + struct tipc_nlist *dests, u16 *cong_link_cnt) +{ + struct tipc_bc_base *bb = tipc_bc_base(net); + struct sk_buff_head inputq, localq; + int rc = 0; + + skb_queue_head_init(&inputq); + skb_queue_head_init(&localq); + + /* Clone packets before they are consumed by next call */ + if (dests->local && !tipc_msg_reassemble(pkts, &localq)) { + rc = -ENOMEM; + goto exit; + } + + if (dests->remote) { + if (!bb->bcast_support) + rc = tipc_rcast_xmit(net, pkts, dests, cong_link_cnt); + else + rc = tipc_bcast_xmit(net, pkts, cong_link_cnt); + } + + if (dests->local) + tipc_sk_mcast_rcv(net, &localq, &inputq); +exit: + __skb_queue_purge(pkts); return rc; } diff --git a/net/tipc/bcast.h b/net/tipc/bcast.h index 18f379198f8f..dd772e6f6fa4 100644 --- a/net/tipc/bcast.h +++ b/net/tipc/bcast.h @@ -66,7 +66,8 @@ void tipc_bcast_remove_peer(struct net *net, struct tipc_link *rcv_bcl); void tipc_bcast_inc_bearer_dst_cnt(struct net *net, int bearer_id); void tipc_bcast_dec_bearer_dst_cnt(struct net *net, int bearer_id); int tipc_bcast_get_mtu(struct net *net); -int tipc_bcast_xmit(struct net *net, struct sk_buff_head *list); +int tipc_mcast_xmit(struct net *net, struct sk_buff_head *pkts, + struct tipc_nlist *dests, u16 *cong_link_cnt); int tipc_bcast_rcv(struct net *net, struct tipc_link *l, struct sk_buff *skb); void tipc_bcast_ack_rcv(struct net *net, struct tipc_link *l, struct tipc_msg *hdr); diff --git a/net/tipc/link.c b/net/tipc/link.c index b0f8646e0631..b17b9e155469 100644 --- a/net/tipc/link.c +++ b/net/tipc/link.c @@ -1032,11 +1032,17 @@ int tipc_link_retrans(struct tipc_link *l, u16 from, u16 to, static bool tipc_data_input(struct tipc_link *l, struct sk_buff *skb, struct sk_buff_head *inputq) { - switch (msg_user(buf_msg(skb))) { + struct tipc_msg *hdr = buf_msg(skb); + + switch (msg_user(hdr)) { case TIPC_LOW_IMPORTANCE: case TIPC_MEDIUM_IMPORTANCE: case TIPC_HIGH_IMPORTANCE: case TIPC_CRITICAL_IMPORTANCE: + if (unlikely(msg_type(hdr) == TIPC_MCAST_MSG)) { + skb_queue_tail(l->bc_rcvlink->inputq, skb); + return true; + } case CONN_MANAGER: skb_queue_tail(inputq, skb); return true; diff --git a/net/tipc/msg.c b/net/tipc/msg.c index ab02d0742476..312ef7de57d7 100644 --- a/net/tipc/msg.c +++ b/net/tipc/msg.c @@ -607,6 +607,23 @@ error: return false; } +bool tipc_msg_pskb_copy(u32 dst, struct sk_buff_head *msg, + struct sk_buff_head *cpy) +{ + struct sk_buff *skb, *_skb; + + skb_queue_walk(msg, skb) { + _skb = pskb_copy(skb, GFP_ATOMIC); + if (!_skb) { + __skb_queue_purge(cpy); + return false; + } + msg_set_destnode(buf_msg(_skb), dst); + __skb_queue_tail(cpy, _skb); + } + return true; +} + /* tipc_skb_queue_sorted(); sort pkt into list according to sequence number * @list: list to be appended to * @seqno: sequence number of buffer to add diff --git a/net/tipc/msg.h b/net/tipc/msg.h index f07b51e3f6f1..c843fd2bc48d 100644 --- a/net/tipc/msg.h +++ b/net/tipc/msg.h @@ -631,14 +631,11 @@ static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id) static inline u32 msg_link_selector(struct tipc_msg *m) { + if (msg_user(m) == MSG_FRAGMENTER) + m = (void *)msg_data(m); return msg_bits(m, 4, 0, 1); } -static inline void msg_set_link_selector(struct tipc_msg *m, u32 n) -{ - msg_set_bits(m, 4, 0, 1, n); -} - /* * Word 5 */ @@ -835,6 +832,8 @@ int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m, int offset, int dsz, int mtu, struct sk_buff_head *list); bool tipc_msg_lookup_dest(struct net *net, struct sk_buff *skb, int *err); bool tipc_msg_reassemble(struct sk_buff_head *list, struct sk_buff_head *rcvq); +bool tipc_msg_pskb_copy(u32 dst, struct sk_buff_head *msg, + struct sk_buff_head *cpy); void __tipc_skb_queue_sorted(struct sk_buff_head *list, u16 seqno, struct sk_buff *skb); diff --git a/net/tipc/node.c b/net/tipc/node.c index 2883f6a0ed98..f96dacf173ab 100644 --- a/net/tipc/node.c +++ b/net/tipc/node.c @@ -1257,6 +1257,19 @@ void tipc_node_broadcast(struct net *net, struct sk_buff *skb) kfree_skb(skb); } +static void tipc_node_mcast_rcv(struct tipc_node *n) +{ + struct tipc_bclink_entry *be = &n->bc_entry; + + /* 'arrvq' is under inputq2's lock protection */ + spin_lock_bh(&be->inputq2.lock); + spin_lock_bh(&be->inputq1.lock); + skb_queue_splice_tail_init(&be->inputq1, &be->arrvq); + spin_unlock_bh(&be->inputq1.lock); + spin_unlock_bh(&be->inputq2.lock); + tipc_sk_mcast_rcv(n->net, &be->arrvq, &be->inputq2); +} + static void tipc_node_bc_sync_rcv(struct tipc_node *n, struct tipc_msg *hdr, int bearer_id, struct sk_buff_head *xmitq) { @@ -1330,15 +1343,8 @@ static void tipc_node_bc_rcv(struct net *net, struct sk_buff *skb, int bearer_id if (!skb_queue_empty(&xmitq)) tipc_bearer_xmit(net, bearer_id, &xmitq, &le->maddr); - /* Deliver. 'arrvq' is under inputq2's lock protection */ - if (!skb_queue_empty(&be->inputq1)) { - spin_lock_bh(&be->inputq2.lock); - spin_lock_bh(&be->inputq1.lock); - skb_queue_splice_tail_init(&be->inputq1, &be->arrvq); - spin_unlock_bh(&be->inputq1.lock); - spin_unlock_bh(&be->inputq2.lock); - tipc_sk_mcast_rcv(net, &be->arrvq, &be->inputq2); - } + if (!skb_queue_empty(&be->inputq1)) + tipc_node_mcast_rcv(n); if (rc & TIPC_LINK_DOWN_EVT) { /* Reception reassembly failure => reset all links to peer */ @@ -1565,6 +1571,9 @@ void tipc_rcv(struct net *net, struct sk_buff *skb, struct tipc_bearer *b) if (unlikely(!skb_queue_empty(&n->bc_entry.namedq))) tipc_named_rcv(net, &n->bc_entry.namedq); + if (unlikely(!skb_queue_empty(&n->bc_entry.inputq1))) + tipc_node_mcast_rcv(n); + if (!skb_queue_empty(&le->inputq)) tipc_sk_rcv(net, &le->inputq); diff --git a/net/tipc/socket.c b/net/tipc/socket.c index d2f353934f82..93b6ae3154c9 100644 --- a/net/tipc/socket.c +++ b/net/tipc/socket.c @@ -740,32 +740,43 @@ static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq, struct tipc_msg *hdr = &tsk->phdr; struct net *net = sock_net(sk); int mtu = tipc_bcast_get_mtu(net); + u32 domain = addr_domain(net, TIPC_CLUSTER_SCOPE); struct sk_buff_head pkts; + struct tipc_nlist dsts; int rc; + /* Block or return if any destination link is congested */ rc = tipc_wait_for_cond(sock, &timeout, !tsk->cong_link_cnt); if (unlikely(rc)) return rc; + /* Lookup destination nodes */ + tipc_nlist_init(&dsts, tipc_own_addr(net)); + tipc_nametbl_lookup_dst_nodes(net, seq->type, seq->lower, + seq->upper, domain, &dsts); + if (!dsts.local && !dsts.remote) + return -EHOSTUNREACH; + + /* Build message header */ msg_set_type(hdr, TIPC_MCAST_MSG); + msg_set_hdr_sz(hdr, MCAST_H_SIZE); msg_set_lookup_scope(hdr, TIPC_CLUSTER_SCOPE); msg_set_destport(hdr, 0); msg_set_destnode(hdr, 0); msg_set_nametype(hdr, seq->type); msg_set_namelower(hdr, seq->lower); msg_set_nameupper(hdr, seq->upper); - msg_set_hdr_sz(hdr, MCAST_H_SIZE); + /* Build message as chain of buffers */ skb_queue_head_init(&pkts); rc = tipc_msg_build(hdr, msg, 0, dlen, mtu, &pkts); - if (unlikely(rc != dlen)) - return rc; - rc = tipc_bcast_xmit(net, &pkts); - if (unlikely(rc == -ELINKCONG)) { - tsk->cong_link_cnt = 1; - rc = 0; - } + /* Send message if build was successful */ + if (unlikely(rc == dlen)) + rc = tipc_mcast_xmit(net, &pkts, &dsts, + &tsk->cong_link_cnt); + + tipc_nlist_purge(&dsts); return rc ? rc : dlen; } |