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tipc: introduce constants for tipc address validation

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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;