diff options
| author | Jozsef Kadlecsik <kadlec@netfilter.org> | 2020-03-09 12:01:42 +0100 |
|---|---|---|
| committer | Jozsef Kadlecsik <kadlec@netfilter.org> | 2020-03-09 12:01:42 +0100 |
| commit | c2dfb6432aea5bb0a3522901b0c44f42d8adbd49 (patch) | |
| tree | 4d2d2a370a8ec52871a7b3781ed024ac4dc35d8f /kernel/net | |
| parent | 73dfa4dfe56f748bd419dd79133d4a61e0917e74 (diff) | |
Introduce --update-counters-first flag for the set target
Stefano Brivio reported that the patch 'netfilter: ipset:
Fix "don't update counters" mode when counters used at the matching'
changed the semantic of when the counters are updated. Before the patch
the counters were updated regardless of the results of the counter
matches, after the patch the counters were updated only if the counter
match conditions (if specified) matched the packet. In order to handle
both ways, the --update-counters-first flag is introduced: when the flag
is specified, the counters are updated before checking the counter match
conditions. Without the flag the current evaluation path (i.e. update
only if counter conditions match) works.
Signed-off-by: Jozsef Kadlecsik <kadlec@netfilter.org>
Diffstat (limited to 'kernel/net')
| -rw-r--r-- | kernel/net/netfilter/ipset/ip_set_core.c | 13 | ||||
| -rw-r--r-- | kernel/net/netfilter/xt_set.c | 21 |
2 files changed, 30 insertions, 4 deletions
diff --git a/kernel/net/netfilter/ipset/ip_set_core.c b/kernel/net/netfilter/ipset/ip_set_core.c index 1df6536..082d89d 100644 --- a/kernel/net/netfilter/ipset/ip_set_core.c +++ b/kernel/net/netfilter/ipset/ip_set_core.c @@ -622,10 +622,9 @@ ip_set_add_packets(u64 packets, struct ip_set_counter *counter) static void ip_set_update_counter(struct ip_set_counter *counter, - const struct ip_set_ext *ext, u32 flags) + const struct ip_set_ext *ext) { - if (ext->packets != ULLONG_MAX && - !(flags & IPSET_FLAG_SKIP_COUNTER_UPDATE)) { + if (ext->packets != ULLONG_MAX) { ip_set_add_bytes(ext->bytes, counter); ip_set_add_packets(ext->packets, counter); } @@ -649,13 +648,19 @@ ip_set_match_extensions(struct ip_set *set, const struct ip_set_ext *ext, if (SET_WITH_COUNTER(set)) { struct ip_set_counter *counter = ext_counter(data, set); + if (flags & IPSET_FLAG_UPDATE_COUNTERS_FIRST) + ip_set_update_counter(counter, ext); + if (flags & IPSET_FLAG_MATCH_COUNTERS && !(ip_set_match_counter(ip_set_get_packets(counter), mext->packets, mext->packets_op) && ip_set_match_counter(ip_set_get_bytes(counter), mext->bytes, mext->bytes_op))) return false; - ip_set_update_counter(counter, ext, flags); + + if (!(flags & (IPSET_FLAG_UPDATE_COUNTERS_FIRST | + IPSET_FLAG_SKIP_COUNTER_UPDATE))) + ip_set_update_counter(counter, ext); } if (SET_WITH_SKBINFO(set)) ip_set_get_skbinfo(ext_skbinfo(data, set), diff --git a/kernel/net/netfilter/xt_set.c b/kernel/net/netfilter/xt_set.c index 95efb3a..7639522 100644 --- a/kernel/net/netfilter/xt_set.c +++ b/kernel/net/netfilter/xt_set.c @@ -646,6 +646,27 @@ static struct xt_match set_matches[] __read_mostly = { .destroy = set_match_v4_destroy, .me = THIS_MODULE }, + /* --update-counters-first flag support */ + { + .name = "set", + .family = NFPROTO_IPV4, + .revision = 5, + .match = set_match_v4, + .matchsize = sizeof(struct xt_set_info_match_v4), + .checkentry = set_match_v4_checkentry, + .destroy = set_match_v4_destroy, + .me = THIS_MODULE + }, + { + .name = "set", + .family = NFPROTO_IPV6, + .revision = 5, + .match = set_match_v4, + .matchsize = sizeof(struct xt_set_info_match_v4), + .checkentry = set_match_v4_checkentry, + .destroy = set_match_v4_destroy, + .me = THIS_MODULE + }, }; static struct xt_target set_targets[] __read_mostly = { |