From: Jon Paul Maloy Date: Wed, 18 Jan 2017 18:50:51 +0000 (-0500) Subject: tipc: add functionality to lookup multicast destination nodes X-Git-Tag: MMI-PSA29.97-13-9~6152^2~366^2~2 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=2ae0b8af1fe35ddaa2e46704ae31a2f9cac0349d;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git tipc: add functionality to lookup multicast destination nodes As a further preparation for the upcoming 'replicast' functionality, we add some necessary structs and functions for looking up and returning a list of all nodes that host destinations for a given multicast message. Reviewed-by: Parthasarathy Bhuvaragan Acked-by: Ying Xue Signed-off-by: Jon Maloy Signed-off-by: David S. Miller --- diff --git a/net/tipc/bcast.c b/net/tipc/bcast.c index 325627612bac..412d3351abb7 100644 --- a/net/tipc/bcast.c +++ b/net/tipc/bcast.c @@ -39,9 +39,8 @@ #include "socket.h" #include "msg.h" #include "bcast.h" -#include "name_distr.h" #include "link.h" -#include "node.h" +#include "name_table.h" #define BCLINK_WIN_DEFAULT 50 /* bcast link window size (default) */ #define BCLINK_WIN_MIN 32 /* bcast minimum link window size */ @@ -434,3 +433,33 @@ void tipc_bcast_stop(struct net *net) kfree(tn->bcbase); kfree(tn->bcl); } + +void tipc_nlist_init(struct tipc_nlist *nl, u32 self) +{ + memset(nl, 0, sizeof(*nl)); + INIT_LIST_HEAD(&nl->list); + nl->self = self; +} + +void tipc_nlist_add(struct tipc_nlist *nl, u32 node) +{ + if (node == nl->self) + nl->local = true; + else if (u32_push(&nl->list, node)) + nl->remote++; +} + +void tipc_nlist_del(struct tipc_nlist *nl, u32 node) +{ + if (node == nl->self) + nl->local = false; + else if (u32_del(&nl->list, node)) + nl->remote--; +} + +void tipc_nlist_purge(struct tipc_nlist *nl) +{ + u32_list_purge(&nl->list); + nl->remote = 0; + nl->local = 0; +} diff --git a/net/tipc/bcast.h b/net/tipc/bcast.h index 855d53c64ab3..18f379198f8f 100644 --- a/net/tipc/bcast.h +++ b/net/tipc/bcast.h @@ -42,9 +42,22 @@ struct tipc_node; struct tipc_msg; struct tipc_nl_msg; -struct tipc_node_map; +struct tipc_nlist; +struct tipc_nitem; extern const char tipc_bclink_name[]; +struct tipc_nlist { + struct list_head list; + u32 self; + u16 remote; + bool local; +}; + +void tipc_nlist_init(struct tipc_nlist *nl, u32 self); +void tipc_nlist_purge(struct tipc_nlist *nl); +void tipc_nlist_add(struct tipc_nlist *nl, u32 node); +void tipc_nlist_del(struct tipc_nlist *nl, u32 node); + int tipc_bcast_init(struct net *net); void tipc_bcast_stop(struct net *net); void tipc_bcast_add_peer(struct net *net, struct tipc_link *l, diff --git a/net/tipc/name_table.c b/net/tipc/name_table.c index 5a86df1e5fc2..9be6592e4a6f 100644 --- a/net/tipc/name_table.c +++ b/net/tipc/name_table.c @@ -645,6 +645,39 @@ exit: return res; } +/* tipc_nametbl_lookup_dst_nodes - find broadcast destination nodes + * - Creates list of nodes that overlap the given multicast address + * - Determines if any node local ports overlap + */ +void tipc_nametbl_lookup_dst_nodes(struct net *net, u32 type, u32 lower, + u32 upper, u32 domain, + struct tipc_nlist *nodes) +{ + struct sub_seq *sseq, *stop; + struct publication *publ; + struct name_info *info; + struct name_seq *seq; + + rcu_read_lock(); + seq = nametbl_find_seq(net, type); + if (!seq) + goto exit; + + spin_lock_bh(&seq->lock); + sseq = seq->sseqs + nameseq_locate_subseq(seq, lower); + stop = seq->sseqs + seq->first_free; + for (; sseq->lower <= upper && sseq != stop; sseq++) { + info = sseq->info; + list_for_each_entry(publ, &info->zone_list, zone_list) { + if (tipc_in_scope(domain, publ->node)) + tipc_nlist_add(nodes, publ->node); + } + } + spin_unlock_bh(&seq->lock); +exit: + rcu_read_unlock(); +} + /* * tipc_nametbl_publish - add name publication to network name tables */ @@ -1022,11 +1055,6 @@ int tipc_nl_name_table_dump(struct sk_buff *skb, struct netlink_callback *cb) return skb->len; } -struct u32_item { - struct list_head list; - u32 value; -}; - bool u32_find(struct list_head *l, u32 value) { struct u32_item *item; diff --git a/net/tipc/name_table.h b/net/tipc/name_table.h index c89bb3f5c364..6ebdeb1d84a5 100644 --- a/net/tipc/name_table.h +++ b/net/tipc/name_table.h @@ -39,6 +39,7 @@ struct tipc_subscription; struct tipc_plist; +struct tipc_nlist; /* * TIPC name types reserved for internal TIPC use (both current and planned) @@ -100,6 +101,9 @@ int tipc_nl_name_table_dump(struct sk_buff *skb, struct netlink_callback *cb); u32 tipc_nametbl_translate(struct net *net, u32 type, u32 instance, u32 *node); int tipc_nametbl_mc_translate(struct net *net, u32 type, u32 lower, u32 upper, u32 limit, struct list_head *dports); +void tipc_nametbl_lookup_dst_nodes(struct net *net, u32 type, u32 lower, + u32 upper, u32 domain, + struct tipc_nlist *nodes); struct publication *tipc_nametbl_publish(struct net *net, u32 type, u32 lower, u32 upper, u32 scope, u32 port_ref, u32 key); @@ -116,6 +120,11 @@ void tipc_nametbl_unsubscribe(struct tipc_subscription *s); int tipc_nametbl_init(struct net *net); void tipc_nametbl_stop(struct net *net); +struct u32_item { + struct list_head list; + u32 value; +}; + bool u32_push(struct list_head *l, u32 value); u32 u32_pop(struct list_head *l); bool u32_find(struct list_head *l, u32 value);