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Date: Fri, 29 Feb 2008 10:41:00 -0800
From: "Stephens, Allan" <allan.stephens@...driver.com>
To: <netdev@...r.kernel.org>
Subject: [PATCH 08/08 net-2.6.26] [TIPC]: TIPC network address handling cleanup
This patch improves the code which manipulates TIPC network
address (aka <Z.C.N> values).
1) Address format validation routines are generalized to
accept any valid <Z.C.N> value.
2) Eliminated inlining of scope checking code to prevent
needless code duplication in non-critical path areas.
3) Introduced new primitives for manipulating network
addresses to improve code readability.
Signed-off-by: Allan Stephens <allan.stephens@...driver.com>
---
net/tipc/addr.c | 35 ++++++++++++++++++++---------------
net/tipc/addr.h | 30 ++++++++++++++++++------------
net/tipc/bearer.c | 2 +-
net/tipc/discover.c | 2 +-
net/tipc/name_table.c | 2 +-
net/tipc/net.c | 2 +-
net/tipc/node.c | 6 +++---
7 files changed, 45 insertions(+), 34 deletions(-)
diff --git a/net/tipc/addr.c b/net/tipc/addr.c
index e5207a1..84570ae 100644
--- a/net/tipc/addr.c
+++ b/net/tipc/addr.c
@@ -2,7 +2,7 @@
* net/tipc/addr.c: TIPC address utility routines
*
* Copyright (c) 2000-2006, Ericsson AB
- * Copyright (c) 2004-2005, Wind River Systems
+ * Copyright (c) 2004-2007, Wind River Systems
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -49,8 +49,7 @@ u32 tipc_get_addr(void)
/**
* tipc_addr_domain_valid - validates a network domain address
*
- * Accepts <Z.C.N>, <Z.C.0>, <Z.0.0>, and <0.0.0>,
- * where Z, C, and N are non-zero and do not exceed the configured
limits.
+ * Accepts <Z.C.N>, <Z.C.0>, <Z.0.0>, and <0.0.0>, where Z, C, & N are
non-zero.
*
* Returns 1 if domain address is valid, otherwise 0
*/
@@ -60,16 +59,6 @@ int tipc_addr_domain_valid(u32 addr)
u32 n = tipc_node(addr);
u32 c = tipc_cluster(addr);
u32 z = tipc_zone(addr);
- u32 max_nodes = tipc_max_nodes;
-
- if (is_slave(addr))
- max_nodes = LOWEST_SLAVE + tipc_max_slaves;
- if (n > max_nodes)
- return 0;
- if (c > tipc_max_clusters)
- return 0;
- if (z > tipc_max_zones)
- return 0;
if (n && (!z || !c))
return 0;
@@ -81,8 +70,7 @@ int tipc_addr_domain_valid(u32 addr)
/**
* tipc_addr_node_valid - validates a proposed network address for this
node
*
- * Accepts <Z.C.N>, where Z, C, and N are non-zero and do not exceed
- * the configured limits.
+ * Accepts <Z.C.N>, where Z, C, and N are non-zero.
*
* Returns 1 if address can be used, otherwise 0
*/
@@ -92,3 +80,20 @@ int tipc_addr_node_valid(u32 addr)
return (tipc_addr_domain_valid(addr) && tipc_node(addr));
}
+/**
+ * tipc_in_scope - determines if network address lies within specified
domain
+ */
+
+int tipc_in_scope(u32 domain, u32 addr)
+{
+ if (likely(domain == addr))
+ return 1;
+ if (domain == 0)
+ return 1;
+ if (domain == addr_cluster(addr)) /* domain <Z.C.0> */
+ return 1;
+ if (domain == addr_zone(addr)) /* domain <Z.0.0> */
+ return 1;
+ return 0;
+}
+
diff --git a/net/tipc/addr.h b/net/tipc/addr.h
index 3ba67e6..097eb20 100644
--- a/net/tipc/addr.h
+++ b/net/tipc/addr.h
@@ -2,7 +2,7 @@
* net/tipc/addr.h: Include file for TIPC address utility routines
*
* Copyright (c) 2000-2006, Ericsson AB
- * Copyright (c) 2004-2005, Wind River Systems
+ * Copyright (c) 2004-2006, Wind River Systems
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -37,6 +37,17 @@
#ifndef _TIPC_ADDR_H
#define _TIPC_ADDR_H
+
+static inline u32 addr_zone(u32 addr)
+{
+ return addr & 0xff000000u;
+}
+
+static inline u32 addr_cluster(u32 addr)
+{
+ return addr & 0xfffff000u;
+}
+
static inline u32 own_node(void)
{
return tipc_node(tipc_own_addr);
@@ -57,6 +68,11 @@ static inline int in_own_cluster(u32 addr)
return !((addr ^ tipc_own_addr) >> 12);
}
+static inline int in_own_zone(u32 addr)
+{
+ return !((addr ^ tipc_own_addr) >> 24);
+}
+
static inline int is_slave(u32 addr)
{
return addr & 0x800;
@@ -67,17 +83,6 @@ static inline int may_route(u32 addr)
return(addr ^ tipc_own_addr) >> 11;
}
-static inline int in_scope(u32 domain, u32 addr)
-{
- if (!domain || (domain == addr))
- return 1;
- if (domain == (addr & 0xfffff000u)) /* domain <Z.C.0> */
- return 1;
- if (domain == (addr & 0xff000000u)) /* domain <Z.0.0> */
- return 1;
- return 0;
-}
-
/**
* addr_scope - convert message lookup domain to equivalent 2-bit scope
value
*/
@@ -119,5 +124,6 @@ static inline char *addr_string_fill(char *string,
u32 addr)
int tipc_addr_domain_valid(u32);
int tipc_addr_node_valid(u32 addr);
+int tipc_in_scope(u32 domain, u32 addr);
#endif
diff --git a/net/tipc/bearer.c b/net/tipc/bearer.c
index 271a375..ec2fd2e 100644
--- a/net/tipc/bearer.c
+++ b/net/tipc/bearer.c
@@ -491,7 +491,7 @@ int tipc_enable_bearer(const char *name, u32
bcast_scope, u32 priority)
return -EINVAL;
}
if (!tipc_addr_domain_valid(bcast_scope) ||
- !in_scope(bcast_scope, tipc_own_addr)) {
+ !tipc_in_scope(bcast_scope, tipc_own_addr)) {
warn("Bearer <%s> rejected, illegal broadcast scope\n",
name);
return -EINVAL;
}
diff --git a/net/tipc/discover.c b/net/tipc/discover.c
index 5d643e5..c2c69c8 100644
--- a/net/tipc/discover.c
+++ b/net/tipc/discover.c
@@ -184,7 +184,7 @@ void tipc_disc_recv_msg(struct sk_buff *buf)
disc_dupl_alert(b_ptr, tipc_own_addr,
&media_addr);
return;
}
- if (!in_scope(dest, tipc_own_addr))
+ if (!tipc_in_scope(dest, tipc_own_addr))
return;
if (is_slave(tipc_own_addr) && is_slave(orig))
return;
diff --git a/net/tipc/name_table.c b/net/tipc/name_table.c
index ac7dfdd..dba78a0 100644
--- a/net/tipc/name_table.c
+++ b/net/tipc/name_table.c
@@ -611,7 +611,7 @@ u32 tipc_nametbl_translate(u32 type, u32 instance,
u32 *destnode)
struct name_seq *seq;
u32 ref;
- if (!in_scope(*destnode, tipc_own_addr))
+ if (!tipc_in_scope(*destnode, tipc_own_addr))
return 0;
read_lock_bh(&tipc_nametbl_lock);
diff --git a/net/tipc/net.c b/net/tipc/net.c
index c39c762..e218c5b 100644
--- a/net/tipc/net.c
+++ b/net/tipc/net.c
@@ -234,7 +234,7 @@ void tipc_net_route_msg(struct sk_buff *buf)
/* Handle message for this node */
dnode = msg_short(msg) ? tipc_own_addr : msg_destnode(msg);
- if (in_scope(dnode, tipc_own_addr)) {
+ if (tipc_in_scope(dnode, tipc_own_addr)) {
if (msg_isdata(msg)) {
if (msg_mcast(msg))
tipc_port_recv_mcast(buf, NULL);
diff --git a/net/tipc/node.c b/net/tipc/node.c
index 598f4d3..1d2cd1f 100644
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -575,7 +575,7 @@ u32 tipc_available_nodes(const u32 domain)
u32 cnt = 0;
for (n_ptr = tipc_nodes; n_ptr; n_ptr = n_ptr->next) {
- if (!in_scope(domain, n_ptr->addr))
+ if (!tipc_in_scope(domain, n_ptr->addr))
continue;
if (tipc_node_is_up(n_ptr))
cnt++;
@@ -616,7 +616,7 @@ struct sk_buff *tipc_node_get_nodes(const void
*req_tlv_area, int req_tlv_space)
/* Add TLVs for all nodes in scope */
for (n_ptr = tipc_nodes; n_ptr; n_ptr = n_ptr->next) {
- if (!in_scope(domain, n_ptr->addr))
+ if (!tipc_in_scope(domain, n_ptr->addr))
continue;
node_info.addr = htonl(n_ptr->addr);
node_info.up = htonl(tipc_node_is_up(n_ptr));
@@ -669,7 +669,7 @@ struct sk_buff *tipc_node_get_links(const void
*req_tlv_area, int req_tlv_space)
for (n_ptr = tipc_nodes; n_ptr; n_ptr = n_ptr->next) {
u32 i;
- if (!in_scope(domain, n_ptr->addr))
+ if (!tipc_in_scope(domain, n_ptr->addr))
continue;
for (i = 0; i < MAX_BEARERS; i++) {
if (!n_ptr->links[i])
--
1.5.3.2
--
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