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kernel: add support for enabling hardware flow offload via iptables

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Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau 2018-03-23 12:53:44 +01:00
parent 11a3d27043
commit d073f650cd
2 changed files with 116 additions and 6 deletions
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87
package/network/utils/iptables/patches/800-flowoffload_target.patch
View file

@ -1,14 +1,71 @@
--- /dev/null
+++ b/extensions/libxt_FLOWOFFLOAD.c
@@ -0,0 +1,15 @@
@@ -0,0 +1,72 @@
+#include <stdio.h>
+#include <xtables.h>
+#include <linux/netfilter/xt_FLOWOFFLOAD.h>
+
+enum {
+ O_HW,
+};
+
+static void offload_help(void)
+{
+ printf(
+"FLOWOFFLOAD target options:\n"
+" --hw Enable hardware offload\n"
+ );
+}
+
+static const struct xt_option_entry offload_opts[] = {
+ {.name = "hw", .id = O_HW, .type = XTTYPE_NONE},
+ XTOPT_TABLEEND,
+};
+
+static void offload_parse(struct xt_option_call *cb)
+{
+ struct xt_flowoffload_target_info *info = cb->data;
+
+ xtables_option_parse(cb);
+ switch (cb->entry->id) {
+ case O_HW:
+ info->flags |= XT_FLOWOFFLOAD_HW;
+ break;
+ }
+}
+
+static void offload_print(const void *ip, const struct xt_entry_target *target, int numeric)
+{
+ const struct xt_flowoffload_target_info *info =
+ (const struct xt_flowoffload_target_info *)target->data;
+
+ printf(" FLOWOFFLOAD");
+ if (info->flags & XT_FLOWOFFLOAD_HW)
+ printf(" hw");
+}
+
+static void offload_save(const void *ip, const struct xt_entry_target *target)
+{
+ const struct xt_flowoffload_target_info *info =
+ (const struct xt_flowoffload_target_info *)target->data;
+
+ if (info->flags & XT_FLOWOFFLOAD_HW)
+ printf(" --hw");
+}
+
+static struct xtables_target offload_tg_reg[] = {
+ {
+ .family = NFPROTO_UNSPEC,
+ .name = "FLOWOFFLOAD",
+ .revision = 0,
+ .version = XTABLES_VERSION,
+ .family = NFPROTO_UNSPEC,
+ .name = "FLOWOFFLOAD",
+ .revision = 0,
+ .version = XTABLES_VERSION,
+ .size = XT_ALIGN(sizeof(struct xt_flowoffload_target_info)),
+ .userspacesize = sizeof(struct xt_flowoffload_target_info),
+ .help = offload_help,
+ .print = offload_print,
+ .save = offload_save,
+ .x6_parse = offload_parse,
+ .x6_options = offload_opts,
+ },
+};
+
@ -16,3 +73,23 @@
+{
+ xtables_register_targets(offload_tg_reg, ARRAY_SIZE(offload_tg_reg));
+}
--- /dev/null
+++ b/include/linux/netfilter/xt_FLOWOFFLOAD.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _XT_FLOWOFFLOAD_H
+#define _XT_FLOWOFFLOAD_H
+
+#include <linux/types.h>
+
+enum {
+ XT_FLOWOFFLOAD_HW = 1 << 0,
+
+ XT_FLOWOFFLOAD_MASK = XT_FLOWOFFLOAD_HW
+};
+
+struct xt_flowoffload_target_info {
+ __u32 flags;
+};
+
+#endif /* _XT_FLOWOFFLOAD_H */

35
target/linux/generic/hack-4.14/650-netfilter-add-xt_OFFLOAD-target.patch
View file

@ -98,7 +98,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
obj-$(CONFIG_NETFILTER_XT_TARGET_LED) += xt_LED.o
--- /dev/null
+++ b/net/netfilter/xt_FLOWOFFLOAD.c
@@ -0,0 +1,351 @@
@@ -0,0 +1,364 @@
+/*
+ * Copyright (C) 2018 Felix Fietkau <nbd@nbd.name>
+ *
@ -109,6 +109,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/netfilter.h>
+#include <linux/netfilter/xt_FLOWOFFLOAD.h>
+#include <net/ip.h>
+#include <net/netfilter/nf_conntrack.h>
+#include <net/netfilter/nf_flow_table.h>
@ -335,6 +336,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+static unsigned int
+flowoffload_tg(struct sk_buff *skb, const struct xt_action_param *par)
+{
+ const struct xt_flowoffload_target_info *info = par->targinfo;
+ enum ip_conntrack_info ctinfo;
+ enum ip_conntrack_dir dir;
+ struct nf_flow_route route;
@ -387,6 +389,9 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+ xt_flowoffload_check_device(xt_in(par));
+ xt_flowoffload_check_device(xt_out(par));
+
+ if (info->flags & XT_FLOWOFFLOAD_HW)
+ nf_flow_offload_hw_add(xt_net(par), flow, ct);
+
+ return XT_CONTINUE;
+
+err_flow_add:
@ -401,6 +406,11 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+
+static int flowoffload_chk(const struct xt_tgchk_param *par)
+{
+ struct xt_flowoffload_target_info *info = par->targinfo;
+
+ if (info->flags & ~XT_FLOWOFFLOAD_MASK)
+ return -EINVAL;
+
+ return 0;
+}
+
@ -408,6 +418,8 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+ .family = NFPROTO_UNSPEC,
+ .name = "FLOWOFFLOAD",
+ .revision = 0,
+ .targetsize = sizeof(struct xt_flowoffload_target_info),
+ .usersize = sizeof(struct xt_flowoffload_target_info),
+ .checkentry = flowoffload_chk,
+ .target = flowoffload_tg,
+ .me = THIS_MODULE,
@ -415,6 +427,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+
+static int xt_flowoffload_table_init(struct nf_flowtable *table)
+{
+ table->flags = NF_FLOWTABLE_F_HW;
+ nf_flow_table_init(table);
+ return 0;
+}
@ -460,3 +473,23 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
#include <net/netfilter/nf_flow_table.h>
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_core.h>
--- /dev/null
+++ b/include/uapi/linux/netfilter/xt_FLOWOFFLOAD.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _XT_FLOWOFFLOAD_H
+#define _XT_FLOWOFFLOAD_H
+
+#include <linux/types.h>
+
+enum {
+ XT_FLOWOFFLOAD_HW = 1 << 0,
+
+ XT_FLOWOFFLOAD_MASK = XT_FLOWOFFLOAD_HW
+};
+
+struct xt_flowoffload_target_info {
+ __u32 flags;
+};
+
+#endif /* _XT_FLOWOFFLOAD_H */