diff options
| author | Hannes Frederic Sowa <hannes@stressinduktion.org> | 2013-10-19 21:48:51 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-10-19 19:45:34 -0400 |
| commit | 65cd8033ff375b68037df61603ee68070dc48578 (patch) | |
| tree | 26b34f9ed023dda5a861001118a1ea1227ae252f /net | |
| parent | 53481da372851a5506deb5247302f75459b472b4 (diff) | |
| download | linux-stable-65cd8033ff375b68037df61603ee68070dc48578.tar.gz linux-stable-65cd8033ff375b68037df61603ee68070dc48578.tar.bz2 linux-stable-65cd8033ff375b68037df61603ee68070dc48578.zip | |
ipv4: split inet_ehashfn to hash functions per compilation unit
This duplicates a bit of code but let's us easily introduce
separate secret keys later. The separate compilation units are
ipv4/inet_hashtabbles.o, ipv4/udp.o and rds/connection.o.
Cc: Eric Dumazet <edumazet@google.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/inet_hashtables.c | 21 | ||||
| -rw-r--r-- | net/ipv4/udp.c | 16 | ||||
| -rw-r--r-- | net/rds/connection.c | 6 |
3 files changed, 36 insertions, 7 deletions
diff --git a/net/ipv4/inet_hashtables.c b/net/ipv4/inet_hashtables.c index a4b66bbe4f21..18aa668d0cc9 100644 --- a/net/ipv4/inet_hashtables.c +++ b/net/ipv4/inet_hashtables.c @@ -24,6 +24,27 @@ #include <net/secure_seq.h> #include <net/ip.h> +static unsigned int inet_ehashfn(struct net *net, const __be32 laddr, + const __u16 lport, const __be32 faddr, + const __be16 fport) +{ + return __inet_ehashfn(laddr, lport, faddr, fport, + inet_ehash_secret + net_hash_mix(net)); +} + + +static unsigned int inet_sk_ehashfn(const struct sock *sk) +{ + const struct inet_sock *inet = inet_sk(sk); + const __be32 laddr = inet->inet_rcv_saddr; + const __u16 lport = inet->inet_num; + const __be32 faddr = inet->inet_daddr; + const __be16 fport = inet->inet_dport; + struct net *net = sock_net(sk); + + return inet_ehashfn(net, laddr, lport, faddr, fport); +} + /* * Allocate and initialize a new local port bind bucket. * The bindhash mutex for snum's hash chain must be held here. diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c index 9f27bb800607..b4437c7db6ce 100644 --- a/net/ipv4/udp.c +++ b/net/ipv4/udp.c @@ -407,6 +407,14 @@ static inline int compute_score2(struct sock *sk, struct net *net, return score; } +static unsigned int udp_ehashfn(struct net *net, const __be32 laddr, + const __u16 lport, const __be32 faddr, + const __be16 fport) +{ + return __inet_ehashfn(laddr, lport, faddr, fport, + inet_ehash_secret + net_hash_mix(net)); +} + /* called with read_rcu_lock() */ static struct sock *udp4_lib_lookup2(struct net *net, @@ -430,8 +438,8 @@ begin: badness = score; reuseport = sk->sk_reuseport; if (reuseport) { - hash = inet_ehashfn(net, daddr, hnum, - saddr, sport); + hash = udp_ehashfn(net, daddr, hnum, + saddr, sport); matches = 1; } } else if (score == badness && reuseport) { @@ -511,8 +519,8 @@ begin: badness = score; reuseport = sk->sk_reuseport; if (reuseport) { - hash = inet_ehashfn(net, daddr, hnum, - saddr, sport); + hash = udp_ehashfn(net, daddr, hnum, + saddr, sport); matches = 1; } } else if (score == badness && reuseport) { diff --git a/net/rds/connection.c b/net/rds/connection.c index 642ad42c416b..45e23660437a 100644 --- a/net/rds/connection.c +++ b/net/rds/connection.c @@ -52,9 +52,9 @@ static struct kmem_cache *rds_conn_slab; static struct hlist_head *rds_conn_bucket(__be32 laddr, __be32 faddr) { /* Pass NULL, don't need struct net for hash */ - unsigned long hash = inet_ehashfn(NULL, - be32_to_cpu(laddr), 0, - be32_to_cpu(faddr), 0); + unsigned long hash = __inet_ehashfn(be32_to_cpu(laddr), 0, + be32_to_cpu(faddr), 0, + inet_ehash_secret); return &rds_conn_hash[hash & RDS_CONNECTION_HASH_MASK]; } |