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Date: Wed, 29 Feb 2012 18:18:29 -0500 From: Paul Gortmaker <paul.gortmaker@...driver.com> To: davem@...emloft.net Cc: netdev@...r.kernel.org, allan.stephens@...driver.com, ying.xue@...driver.com, Paul Gortmaker <paul.gortmaker@...driver.com> Subject: [PATCH net-next 03/17] tipc: Remove duplicate check of message destination node From: Allan Stephens <allan.stephens@...driver.com> Eliminates a check in the processing of TIPC messages arriving from off node that ensures the message is destined for this node, since this check duplicates an earlier check. (The check would be necessary if TIPC needed to be able to route incoming messages to another node, but the elimination of multi-cluster support means that this never happens and all incoming messages are consumed by the receiving node.) Note: This change involves the elimination of a single "if" statement with a large "then" clause; consequently, a significant number of lines end up getting re-indented. In addition, a simple message header access routine that is no longer referenced is eliminated. However, the only functional change is the elimination of the single check described above. Signed-off-by: Allan Stephens <allan.stephens@...driver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@...driver.com> --- net/tipc/link.c | 93 +++++++++++++++++++++++++++---------------------------- net/tipc/msg.h | 5 --- 2 files changed, 46 insertions(+), 52 deletions(-) diff --git a/net/tipc/link.c b/net/tipc/link.c index d8b0a22..6cc78a9 100644 --- a/net/tipc/link.c +++ b/net/tipc/link.c @@ -1773,57 +1773,56 @@ protocol_check: if (unlikely(l_ptr->oldest_deferred_in)) head = link_insert_deferred_queue(l_ptr, head); - if (likely(msg_is_dest(msg, tipc_own_addr))) { - int ret; deliver: - if (likely(msg_isdata(msg))) { - tipc_node_unlock(n_ptr); - tipc_port_recv_msg(buf); - continue; + if (likely(msg_isdata(msg))) { + tipc_node_unlock(n_ptr); + tipc_port_recv_msg(buf); + continue; + } + switch (msg_user(msg)) { + int ret; + case MSG_BUNDLER: + l_ptr->stats.recv_bundles++; + l_ptr->stats.recv_bundled += + msg_msgcnt(msg); + tipc_node_unlock(n_ptr); + tipc_link_recv_bundle(buf); + continue; + case NAME_DISTRIBUTOR: + tipc_node_unlock(n_ptr); + tipc_named_recv(buf); + continue; + case CONN_MANAGER: + tipc_node_unlock(n_ptr); + tipc_port_recv_proto_msg(buf); + continue; + case MSG_FRAGMENTER: + l_ptr->stats.recv_fragments++; + ret = tipc_link_recv_fragment( + &l_ptr->defragm_buf, + &buf, &msg); + if (ret == 1) { + l_ptr->stats.recv_fragmented++; + goto deliver; } - switch (msg_user(msg)) { - case MSG_BUNDLER: - l_ptr->stats.recv_bundles++; - l_ptr->stats.recv_bundled += - msg_msgcnt(msg); - tipc_node_unlock(n_ptr); - tipc_link_recv_bundle(buf); - continue; - case NAME_DISTRIBUTOR: - tipc_node_unlock(n_ptr); - tipc_named_recv(buf); - continue; - case CONN_MANAGER: - tipc_node_unlock(n_ptr); - tipc_port_recv_proto_msg(buf); - continue; - case MSG_FRAGMENTER: - l_ptr->stats.recv_fragments++; - ret = tipc_link_recv_fragment( - &l_ptr->defragm_buf, - &buf, &msg); - if (ret == 1) { - l_ptr->stats.recv_fragmented++; + if (ret == -1) + l_ptr->next_in_no--; + break; + case CHANGEOVER_PROTOCOL: + type = msg_type(msg); + if (link_recv_changeover_msg(&l_ptr, + &buf)) { + msg = buf_msg(buf); + seq_no = msg_seqno(msg); + if (type == ORIGINAL_MSG) goto deliver; - } - if (ret == -1) - l_ptr->next_in_no--; - break; - case CHANGEOVER_PROTOCOL: - type = msg_type(msg); - if (link_recv_changeover_msg(&l_ptr, &buf)) { - msg = buf_msg(buf); - seq_no = msg_seqno(msg); - if (type == ORIGINAL_MSG) - goto deliver; - goto protocol_check; - } - break; - default: - buf_discard(buf); - buf = NULL; - break; + goto protocol_check; } + break; + default: + buf_discard(buf); + buf = NULL; + break; } tipc_node_unlock(n_ptr); tipc_net_route_msg(buf); diff --git a/net/tipc/msg.h b/net/tipc/msg.h index 2ec13b7..eba524e3 100644 --- a/net/tipc/msg.h +++ b/net/tipc/msg.h @@ -384,11 +384,6 @@ static inline void msg_set_destnode(struct tipc_msg *m, u32 a) msg_set_word(m, 7, a); } -static inline int msg_is_dest(struct tipc_msg *m, u32 d) -{ - return msg_short(m) || (msg_destnode(m) == d); -} - static inline u32 msg_nametype(struct tipc_msg *m) { return msg_word(m, 8); -- 1.7.9.1 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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