These are the updated patches (against net-2.6.19) to increase the number
of possible routing tables to 2^32. They basically consist of four parts:
- Use u32 for routing table IDs everywhere inside the kernel
- Introduce new netlink attributes to carry extended table IDs and add
compatibility functions to use either rtm_table or the new attributes
if given.
- Prepare IPv4/IPv6/DecNET for increasing RT_TABLE_MAX to 2^32 by using
hash tables instead of a fixed size array of pointers (IPv4 and DecNET,
IPv6 already contains that part) and replacing iterations over all
possible table IDs by hash walking.
- Finally, increase RT_TABLE_MAX to 2^32
IPv4 and IPv6 are tested with and without CONFIG_MULTIPLE_TABLES, DecNET
is only compile tested.
include/linux/fib_rules.h | 4 +
include/linux/rtnetlink.h | 12 ++-
include/net/dn_fib.h | 7 -
include/net/fib_rules.h | 7 +
include/net/ip6_route.h | 7 +
include/net/ip_fib.h | 39 +++-------
net/core/fib_rules.c | 5 -
net/decnet/dn_fib.c | 62 +---------------
net/decnet/dn_route.c | 1
net/decnet/dn_rules.c | 2
net/decnet/dn_table.c | 136 ++++++++++++++++++++++++++----------
net/ipv4/fib_frontend.c | 117 ++++++++++++++++++++-----------
net/ipv4/fib_hash.c | 30 ++++----
net/ipv4/fib_lookup.h | 4 -
net/ipv4/fib_rules.c | 7 +
net/ipv4/fib_semantics.c | 5 -
net/ipv4/fib_trie.c | 32 ++++----
net/ipv4/route.c | 1
net/ipv6/fib6_rules.c | 1
net/ipv6/ip6_fib.c | 171 ++++++++++++++++++++++++++++++++++++++++------
net/ipv6/route.c | 141 ++-----------------------------------
21 files changed, 430 insertions(+), 361 deletions(-)
Patrick McHardy:
[NET]: Use u32 for routing table IDs
[NET]: Introduce RTA_TABLE/FRA_TABLE attributes
[IPV4]: Increase number of possible routing tables to 2^32
[IPV6]: Increase number of possible routing tables to 2^32
[DECNET]: Increase number of possible routing tables to 2^32
[NET]: Increate RT_TABLE_MAX to 2^32
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