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Message-Id: <20210603101425.560384-2-me@ubique.spb.ru>
Date: Thu, 3 Jun 2021 14:14:16 +0400
From: Dmitrii Banshchikov <me@...que.spb.ru>
To: bpf@...r.kernel.org
Cc: Dmitrii Banshchikov <me@...que.spb.ru>, ast@...nel.org,
davem@...emloft.net, daniel@...earbox.net, andrii@...nel.org,
kafai@...com, songliubraving@...com, yhs@...com,
john.fastabend@...il.com, kpsingh@...nel.org,
netdev@...r.kernel.org, rdna@...com
Subject: [PATCH bpf-next v1 01/10] bpfilter: Add types for usermode helper
Add more definitions that mirror existing iptables' ABI.
These definitions will be used in bpfilter usermode helper.
Signed-off-by: Dmitrii Banshchikov <me@...que.spb.ru>
---
include/uapi/linux/bpfilter.h | 155 ++++++++++++++++++++++++++++++++++
1 file changed, 155 insertions(+)
diff --git a/include/uapi/linux/bpfilter.h b/include/uapi/linux/bpfilter.h
index cbc1f5813f50..e97d95d0ba54 100644
--- a/include/uapi/linux/bpfilter.h
+++ b/include/uapi/linux/bpfilter.h
@@ -3,6 +3,13 @@
#define _UAPI_LINUX_BPFILTER_H
#include <linux/if.h>
+#include <linux/const.h>
+
+#define BPFILTER_FUNCTION_MAXNAMELEN 30
+#define BPFILTER_EXTENSION_MAXNAMELEN 29
+
+#define BPFILTER_STANDARD_TARGET ""
+#define BPFILTER_ERROR_TARGET "ERROR"
enum {
BPFILTER_IPT_SO_SET_REPLACE = 64,
@@ -18,4 +25,152 @@ enum {
BPFILTER_IPT_GET_MAX,
};
+enum {
+ BPFILTER_XT_TABLE_MAXNAMELEN = 32,
+};
+
+enum {
+ BPFILTER_NF_DROP = 0,
+ BPFILTER_NF_ACCEPT = 1,
+ BPFILTER_NF_STOLEN = 2,
+ BPFILTER_NF_QUEUE = 3,
+ BPFILTER_NF_REPEAT = 4,
+ BPFILTER_NF_STOP = 5,
+ BPFILTER_NF_MAX_VERDICT = BPFILTER_NF_STOP,
+ BPFILTER_RETURN = (-BPFILTER_NF_REPEAT - 1),
+};
+
+enum {
+ BPFILTER_INET_HOOK_PRE_ROUTING = 0,
+ BPFILTER_INET_HOOK_LOCAL_IN = 1,
+ BPFILTER_INET_HOOK_FORWARD = 2,
+ BPFILTER_INET_HOOK_LOCAL_OUT = 3,
+ BPFILTER_INET_HOOK_POST_ROUTING = 4,
+ BPFILTER_INET_HOOK_MAX,
+};
+
+enum {
+ BPFILTER_IPT_F_MASK = 0x03,
+ BPFILTER_IPT_INV_MASK = 0x7f
+};
+
+struct bpfilter_ipt_match {
+ union {
+ struct {
+ __u16 match_size;
+ char name[BPFILTER_EXTENSION_MAXNAMELEN];
+ __u8 revision;
+ } user;
+ struct {
+ __u16 match_size;
+ void *match;
+ } kernel;
+ __u16 match_size;
+ } u;
+ unsigned char data[0];
+};
+
+struct bpfilter_ipt_target {
+ union {
+ struct {
+ __u16 target_size;
+ char name[BPFILTER_EXTENSION_MAXNAMELEN];
+ __u8 revision;
+ } user;
+ struct {
+ __u16 target_size;
+ void *target;
+ } kernel;
+ __u16 target_size;
+ } u;
+ unsigned char data[0];
+};
+
+struct bpfilter_ipt_standard_target {
+ struct bpfilter_ipt_target target;
+ int verdict;
+};
+
+struct bpfilter_ipt_error_target {
+ struct bpfilter_ipt_target target;
+ char error_name[BPFILTER_FUNCTION_MAXNAMELEN];
+};
+
+struct bpfilter_ipt_get_info {
+ char name[BPFILTER_XT_TABLE_MAXNAMELEN];
+ __u32 valid_hooks;
+ __u32 hook_entry[BPFILTER_INET_HOOK_MAX];
+ __u32 underflow[BPFILTER_INET_HOOK_MAX];
+ __u32 num_entries;
+ __u32 size;
+};
+
+struct bpfilter_ipt_counters {
+ __u64 packet_cnt;
+ __u64 byte_cnt;
+};
+
+struct bpfilter_ipt_counters_info {
+ char name[BPFILTER_XT_TABLE_MAXNAMELEN];
+ __u32 num_counters;
+ struct bpfilter_ipt_counters counters[0];
+};
+
+struct bpfilter_ipt_get_revision {
+ char name[BPFILTER_EXTENSION_MAXNAMELEN];
+ __u8 revision;
+};
+
+struct bpfilter_ipt_ip {
+ __u32 src;
+ __u32 dst;
+ __u32 src_mask;
+ __u32 dst_mask;
+ char in_iface[IFNAMSIZ];
+ char out_iface[IFNAMSIZ];
+ __u8 in_iface_mask[IFNAMSIZ];
+ __u8 out_iface_mask[IFNAMSIZ];
+ __u16 protocol;
+ __u8 flags;
+ __u8 invflags;
+};
+
+struct bpfilter_ipt_entry {
+ struct bpfilter_ipt_ip ip;
+ __u32 bfcache;
+ __u16 target_offset;
+ __u16 next_offset;
+ __u32 comefrom;
+ struct bpfilter_ipt_counters counters;
+ __u8 elems[0];
+};
+
+struct bpfilter_ipt_standard_entry {
+ struct bpfilter_ipt_entry entry;
+ struct bpfilter_ipt_standard_target target;
+};
+
+struct bpfilter_ipt_error_entry {
+ struct bpfilter_ipt_entry entry;
+ struct bpfilter_ipt_error_target target;
+};
+
+struct bpfilter_ipt_get_entries {
+ char name[BPFILTER_XT_TABLE_MAXNAMELEN];
+ __u32 size;
+ struct bpfilter_ipt_entry entries[0];
+};
+
+struct bpfilter_ipt_replace {
+ char name[BPFILTER_XT_TABLE_MAXNAMELEN];
+ __u32 valid_hooks;
+ __u32 num_entries;
+ __u32 size;
+ __u32 hook_entry[BPFILTER_INET_HOOK_MAX];
+ __u32 underflow[BPFILTER_INET_HOOK_MAX];
+ __u32 num_counters;
+ struct bpfilter_ipt_counters *cntrs;
+ struct bpfilter_ipt_entry entries[0];
+};
+
#endif /* _UAPI_LINUX_BPFILTER_H */
--
2.25.1
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