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tipc: Add network address mask helper routines 

Introduces a pair of helper routines that convert the network address
for a TIPC node into the network address for its cluster or zone.

This is a cosmetic change designed to avoid future errors caused by
the incorrect use of address bitmasks, and does not alter the existing
operation of TIPC.

Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
This commit is contained in:
Allan Stephens 2011-02-23 11:44:49 -05:00 committed by Paul Gortmaker
parent aa84729484
commit a3796f895f
3 changed files with 16 additions and 7 deletions
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4
net/tipc/addr.c
View File

@ -81,9 +81,9 @@ int tipc_in_scope(u32 domain, u32 addr)
{
if (!domain || (domain == addr))
return 1;
if (domain == (addr & 0xfffff000u)) /* domain <Z.C.0> */
if (domain == tipc_cluster_mask(addr)) /* domain <Z.C.0> */
return 1;
if (domain == (addr & 0xff000000u)) /* domain <Z.0.0> */
if (domain == tipc_zone_mask(addr)) /* domain <Z.0.0> */
return 1;
return 0;
}

17
net/tipc/addr.h
View File

@ -37,6 +37,16 @@
#ifndef _TIPC_ADDR_H
#define _TIPC_ADDR_H
static inline u32 tipc_zone_mask(u32 addr)
{
return addr & 0xff000000u;
}
static inline u32 tipc_cluster_mask(u32 addr)
{
return addr & 0xfffff000u;
}
static inline int in_own_cluster(u32 addr)
{
return !((addr ^ tipc_own_addr) >> 12);
@ -49,14 +59,13 @@ static inline int in_own_cluster(u32 addr)
* after a network hop.
*/
static inline int addr_domain(int sc)
static inline u32 addr_domain(u32 sc)
{
if (likely(sc == TIPC_NODE_SCOPE))
return tipc_own_addr;
if (sc == TIPC_CLUSTER_SCOPE)
return tipc_addr(tipc_zone(tipc_own_addr),
tipc_cluster(tipc_own_addr), 0);
return tipc_addr(tipc_zone(tipc_own_addr), 0, 0);
return tipc_cluster_mask(tipc_own_addr);
return tipc_zone_mask(tipc_own_addr);
}
int tipc_addr_domain_valid(u32);

2
net/tipc/node.c
View File

@ -470,7 +470,7 @@ struct sk_buff *tipc_node_get_links(const void *req_tlv_area, int req_tlv_space)
/* Add TLV for broadcast link */
link_info.dest = htonl(tipc_own_addr & 0xfffff000);
link_info.dest = htonl(tipc_cluster_mask(tipc_own_addr));
link_info.up = htonl(1);
strlcpy(link_info.str, tipc_bclink_name, TIPC_MAX_LINK_NAME);
tipc_cfg_append_tlv(buf, TIPC_TLV_LINK_INFO, &link_info, sizeof(link_info));