NFQUEUE: add --queue-cpu-fanout parameter
Signed-off-by: Holger Eitzenberger <holger@eitzenberger.org>
===================================================================
@@ -13,8 +13,10 @@
O_QUEUE_NUM = 0,
O_QUEUE_BALANCE,
O_QUEUE_BYPASS,
+ O_QUEUE_CPU_FANOUT,
F_QUEUE_NUM = 1 << O_QUEUE_NUM,
F_QUEUE_BALANCE = 1 << O_QUEUE_BALANCE,
+ F_QUEUE_CPU_FANOUT = 1 << O_QUEUE_CPU_FANOUT,
};
static void NFQUEUE_help(void)
@@ -37,7 +39,15 @@
{
NFQUEUE_help_v1();
printf(
-" --queue-bypass Bypass Queueing if no queue instance exists.\n");
+" --queue-bypass Bypass Queueing if no queue instance exists.\n"
+" --queue-cpu-fanout Use current CPU (no hashing)\n");
+}
+
+static void NFQUEUE_help_v3(void)
+{
+ NFQUEUE_help_v2();
+ printf(
+" --queue-cpu-fanout Use current CPU (no hashing)\n");
}
#define s struct xt_NFQ_info
@@ -48,6 +58,8 @@
{.name = "queue-balance", .id = O_QUEUE_BALANCE,
.type = XTTYPE_UINT16RC, .excl = F_QUEUE_NUM},
{.name = "queue-bypass", .id = O_QUEUE_BYPASS, .type = XTTYPE_NONE},
+ {.name = "queue-cpu-fanout", .id = O_QUEUE_CPU_FANOUT,
+ .type = XTTYPE_NONE, .also = F_QUEUE_BALANCE},
XTOPT_TABLEEND,
};
#undef s
@@ -92,6 +104,18 @@
}
}
+static void NFQUEUE_parse_v3(struct xt_option_call *cb)
+{
+ struct xt_NFQ_info_v3 *info = cb->data;
+
+ NFQUEUE_parse_v2(cb);
+ switch (cb->entry->id) {
+ case O_QUEUE_CPU_FANOUT:
+ info->flags |= NFQ_FLAG_CPU_FANOUT;
+ break;
+ }
+}
+
static void NFQUEUE_print(const void *ip,
const struct xt_entry_target *target, int numeric)
{
@@ -120,10 +144,20 @@
const struct xt_NFQ_info_v2 *info = (void *) target->data;
NFQUEUE_print_v1(ip, target, numeric);
- if (info->bypass)
+ if (info->bypass & NFQ_FLAG_BYPASS)
printf(" bypass");
}
+static void NFQUEUE_print_v3(const void *ip,
+ const struct xt_entry_target *target, int numeric)
+{
+ const struct xt_NFQ_info_v3 *info = (void *)target->data;
+
+ NFQUEUE_print_v2(ip, target, numeric);
+ if (info->flags & NFQ_FLAG_CPU_FANOUT)
+ printf(" cpu-fanout");
+}
+
static void NFQUEUE_save(const void *ip, const struct xt_entry_target *target)
{
const struct xt_NFQ_info *tinfo =
@@ -151,10 +185,20 @@
NFQUEUE_save_v1(ip, target);
- if (info->bypass)
+ if (info->bypass & NFQ_FLAG_BYPASS)
printf(" --queue-bypass");
}
+static void NFQUEUE_save_v3(const void *ip,
+ const struct xt_entry_target *target)
+{
+ const struct xt_NFQ_info_v3 *info = (void *)target->data;
+
+ NFQUEUE_save_v2(ip, target);
+ if (info->flags & NFQ_FLAG_CPU_FANOUT)
+ printf(" --queue-cpu-fanout");
+}
+
static void NFQUEUE_init_v1(struct xt_entry_target *t)
{
struct xt_NFQ_info_v1 *tinfo = (void *)t->data;
@@ -199,6 +243,19 @@
.save = NFQUEUE_save_v2,
.x6_parse = NFQUEUE_parse_v2,
.x6_options = NFQUEUE_opts,
+},{
+ .family = NFPROTO_UNSPEC,
+ .revision = 3,
+ .name = "NFQUEUE",
+ .version = XTABLES_VERSION,
+ .size = XT_ALIGN(sizeof(struct xt_NFQ_info_v3)),
+ .userspacesize = XT_ALIGN(sizeof(struct xt_NFQ_info_v3)),
+ .help = NFQUEUE_help_v3,
+ .init = NFQUEUE_init_v1,
+ .print = NFQUEUE_print_v3,
+ .save = NFQUEUE_save_v3,
+ .x6_parse = NFQUEUE_parse_v3,
+ .x6_options = NFQUEUE_opts,
}
};
===================================================================
@@ -26,4 +26,13 @@
__u16 bypass;
};
+struct xt_NFQ_info_v3 {
+ __u16 queuenum;
+ __u16 queues_total;
+ __u16 flags;
+#define NFQ_FLAG_BYPASS 0x01 /* for compatibility with v2 */
+#define NFQ_FLAG_CPU_FANOUT 0x02 /* use current CPU (no hashing) */
+#define NFQ_FLAG_MASK 0x03
+};
+
#endif /* _XT_NFQ_TARGET_H */
===================================================================
@@ -23,3 +23,11 @@
By default, if no userspace program is listening on an NFQUEUE, then all packets that are to be queued
are dropped. When this option is used, the NFQUEUE rule is silently bypassed instead. The packet
will move on to the next rule.
+.PP
+.TP
+\fB\-\-queue\-cpu-fanout\fP
+When used together with \fB--queue-balance\fP this will use the CPU ID
+as an index into the NFQUEUEs. This is a performance improvement if
+all packet handling CPUs have a corresponding NFQUEUE.
+
+Requires \fB--queue-balance\fP to be specified.