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author | Allan Stephens <allan.stephens@windriver.com> | 2012-04-18 02:02:01 +0400 |
---|---|---|
committer | Paul Gortmaker <paul.gortmaker@windriver.com> | 2012-04-19 23:46:39 +0400 |
commit | 336ebf5bf524e447227cb1d785b22ca722e6afa7 (patch) | |
tree | 72e72c183cf43ccfbb756a7866c8b3cf90eb6781 /net/tipc/addr.h | |
parent | fd6eced8a482986784eb1f3aa0838dbdd725e71c (diff) | |
download | linux-336ebf5bf524e447227cb1d785b22ca722e6afa7.tar.xz |
tipc: Add routines for safe checking of node's network address
Introduces routines that test whether a given network address is
equal to a node's own network address or if it lies within the node's
own network cluster, and which work properly regardless of whether
the node is using the default network address <0.0.0> or a non-zero
network address that is assigned later on. In essence, these routines
ensure that address <0.0.0> is treated as an alias for "this node",
regardless of which network address the node is actually using.
Old users of the pre-existing more strict match in_own_cluster()
have been accordingly redirected to what is now called
in_own_cluster_exact() --- which does not extend matching to <0,0,0>.
Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Diffstat (limited to 'net/tipc/addr.h')
-rw-r--r-- | net/tipc/addr.h | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/net/tipc/addr.h b/net/tipc/addr.h index e4f35afe3207..d706a1d92be8 100644 --- a/net/tipc/addr.h +++ b/net/tipc/addr.h @@ -50,12 +50,30 @@ static inline u32 tipc_cluster_mask(u32 addr) return addr & TIPC_CLUSTER_MASK; } -static inline int in_own_cluster(u32 addr) +static inline int in_own_cluster_exact(u32 addr) { return !((addr ^ tipc_own_addr) >> 12); } /** + * in_own_node - test for node inclusion; <0.0.0> always matches + */ + +static inline int in_own_node(u32 addr) +{ + return (addr == tipc_own_addr) || !addr; +} + +/** + * in_own_cluster - test for cluster inclusion; <0.0.0> always matches + */ + +static inline int in_own_cluster(u32 addr) +{ + return in_own_cluster_exact(addr) || !addr; +} + +/** * addr_domain - convert 2-bit scope value to equivalent message lookup domain * * Needed when address of a named message must be looked up a second time |