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tipc: introduce constants for tipc address validation 

In this commit, we introduce defines for tipc address size,
offset and mask specification for Zone.Cluster.Node.
There is no functional change in this commit.

Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Parthasarathy Bhuvaragan 2016-07-26 08:47:18 +02:00 committed by David S. Miller
parent d1c2b5010d
commit 9ff26e9fab
3 changed files with 29 additions and 10 deletions
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30
include/uapi/linux/tipc.h
View File

@ -60,26 +60,48 @@ struct tipc_name_seq {
__u32 upper;
};
/* TIPC Address Size, Offset, Mask specification for Z.C.N
*/
#define TIPC_NODE_BITS 12
#define TIPC_CLUSTER_BITS 12
#define TIPC_ZONE_BITS 8
#define TIPC_NODE_OFFSET 0
#define TIPC_CLUSTER_OFFSET TIPC_NODE_BITS
#define TIPC_ZONE_OFFSET (TIPC_CLUSTER_OFFSET + TIPC_CLUSTER_BITS)
#define TIPC_NODE_SIZE ((1UL << TIPC_NODE_BITS) - 1)
#define TIPC_CLUSTER_SIZE ((1UL << TIPC_CLUSTER_BITS) - 1)
#define TIPC_ZONE_SIZE ((1UL << TIPC_ZONE_BITS) - 1)
#define TIPC_NODE_MASK (TIPC_NODE_SIZE << TIPC_NODE_OFFSET)
#define TIPC_CLUSTER_MASK (TIPC_CLUSTER_SIZE << TIPC_CLUSTER_OFFSET)
#define TIPC_ZONE_MASK (TIPC_ZONE_SIZE << TIPC_ZONE_OFFSET)
#define TIPC_ZONE_CLUSTER_MASK (TIPC_ZONE_MASK | TIPC_CLUSTER_MASK)
static inline __u32 tipc_addr(unsigned int zone,
unsigned int cluster,
unsigned int node)
{
return (zone << 24) | (cluster << 12) | node;
return (zone << TIPC_ZONE_OFFSET) |
(cluster << TIPC_CLUSTER_OFFSET) |
node;
}
static inline unsigned int tipc_zone(__u32 addr)
{
return addr >> 24;
return addr >> TIPC_ZONE_OFFSET;
}
static inline unsigned int tipc_cluster(__u32 addr)
{
return (addr >> 12) & 0xfff;
return (addr & TIPC_CLUSTER_MASK) >> TIPC_CLUSTER_OFFSET;
}
static inline unsigned int tipc_node(__u32 addr)
{
return addr & 0xfff;
return addr & TIPC_NODE_MASK;
}
/*

5
net/tipc/addr.h
View File

@ -43,9 +43,6 @@
#include <net/netns/generic.h>
#include "core.h"
#define TIPC_ZONE_MASK 0xff000000u
#define TIPC_CLUSTER_MASK 0xfffff000u
static inline u32 tipc_own_addr(struct net *net)
{
struct tipc_net *tn = net_generic(net, tipc_net_id);
@ -60,7 +57,7 @@ static inline u32 tipc_zone_mask(u32 addr)
static inline u32 tipc_cluster_mask(u32 addr)
{
return addr & TIPC_CLUSTER_MASK;
return addr & TIPC_ZONE_CLUSTER_MASK;
}
u32 tipc_own_addr(struct net *net);

4
net/tipc/bearer.c
View File

@ -225,7 +225,7 @@ static int tipc_enable_bearer(struct net *net, const char *name,
if (tipc_addr_domain_valid(disc_domain) &&
(disc_domain != tn->own_addr)) {
if (tipc_in_scope(disc_domain, tn->own_addr)) {
disc_domain = tn->own_addr & TIPC_CLUSTER_MASK;
disc_domain = tn->own_addr & TIPC_ZONE_CLUSTER_MASK;
res = 0; /* accept any node in own cluster */
} else if (in_own_cluster_exact(net, disc_domain))
res = 0; /* accept specified node in own cluster */
@ -832,7 +832,7 @@ int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
u32 prio;
prio = TIPC_MEDIA_LINK_PRI;
domain = tn->own_addr & TIPC_CLUSTER_MASK;
domain = tn->own_addr & TIPC_ZONE_CLUSTER_MASK;
if (!info->attrs[TIPC_NLA_BEARER])
return -EINVAL;