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-rw-r--r--src/xdp/.gitignore5
-rw-r--r--src/xdp/Makefile12
-rw-r--r--src/xdp/common/Makefile23
-rw-r--r--src/xdp/common/README.org8
-rw-r--r--src/xdp/common/common.mk103
-rw-r--r--src/xdp/common/common_defines.h38
-rw-r--r--src/xdp/common/common_libbpf.c161
-rw-r--r--src/xdp/common/common_libbpf.h24
-rw-r--r--src/xdp/common/common_params.c197
-rw-r--r--src/xdp/common/common_params.h22
-rw-r--r--src/xdp/common/common_user_bpf_xdp.c389
-rw-r--r--src/xdp/common/common_user_bpf_xdp.h20
-rw-r--r--src/xdp/common/parsing_helpers.h244
-rw-r--r--src/xdp/common/rewrite_helpers.h144
-rw-r--r--src/xdp/common/xdp_stats_kern.h44
-rw-r--r--src/xdp/common/xdp_stats_kern_user.h19
-rw-r--r--src/xdp/include/bpf_endian.h58
-rw-r--r--src/xdp/include/bpf_legacy.h38
-rw-r--r--src/xdp/include/bpf_util.h61
-rw-r--r--src/xdp/include/jhash.h172
-rw-r--r--src/xdp/include/linux/bpf.h3278
-rw-r--r--src/xdp/include/linux/err.h33
-rw-r--r--src/xdp/include/linux/if_link.h1025
-rw-r--r--src/xdp/include/linux/if_xdp.h108
-rw-r--r--src/xdp/include/perf-sys.h77
-rw-r--r--src/xdp/utils/Makefile11
-rw-r--r--src/xdp/utils/xdp_loader.c165
-rw-r--r--src/xdp/utils/xdp_stats.c298
-rw-r--r--src/xdp/xdp_prog_kern.c347
-rw-r--r--src/xdp/xdp_prog_user.c182
30 files changed, 0 insertions, 7306 deletions
diff --git a/src/xdp/.gitignore b/src/xdp/.gitignore
deleted file mode 100644
index 2c931cf47..000000000
--- a/src/xdp/.gitignore
+++ /dev/null
@@ -1,5 +0,0 @@
-*.o
-*.ll
-xdp_loader
-xdp_prog_user
-xdp_stats
diff --git a/src/xdp/Makefile b/src/xdp/Makefile
deleted file mode 100644
index 0b5a6eaa0..000000000
--- a/src/xdp/Makefile
+++ /dev/null
@@ -1,12 +0,0 @@
-# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
-
-XDP_TARGETS := xdp_prog_kern
-USER_TARGETS := xdp_prog_user
-
-COMMON_DIR = common
-
-COPY_LOADER := xdp_loader
-COPY_STATS := xdp_stats
-EXTRA_DEPS := $(COMMON_DIR)/parsing_helpers.h
-
-include $(COMMON_DIR)/common.mk
diff --git a/src/xdp/common/Makefile b/src/xdp/common/Makefile
deleted file mode 100644
index 2502027e9..000000000
--- a/src/xdp/common/Makefile
+++ /dev/null
@@ -1,23 +0,0 @@
-# SPDX-License-Identifier: (GPL-2.0)
-CC := gcc
-
-all: common_params.o common_user_bpf_xdp.o common_libbpf.o
-
-CFLAGS := -g -Wall
-
-CFLAGS += -I../include/
-# TODO: Do we need to make libbpf from this make file too?
-
-common_params.o: common_params.c common_params.h
- $(CC) $(CFLAGS) -c -o $@ $<
-
-common_user_bpf_xdp.o: common_user_bpf_xdp.c common_user_bpf_xdp.h
- $(CC) $(CFLAGS) -c -o $@ $<
-
-common_libbpf.o: common_libbpf.c common_libbpf.h
- $(CC) $(CFLAGS) -c -o $@ $<
-
-.PHONY: clean
-
-clean:
- rm -f *.o
diff --git a/src/xdp/common/README.org b/src/xdp/common/README.org
deleted file mode 100644
index 561fdbced..000000000
--- a/src/xdp/common/README.org
+++ /dev/null
@@ -1,8 +0,0 @@
-# -*- fill-column: 76; -*-
-#+TITLE: Common files
-#+OPTIONS: ^:nil
-
-This directory contains code that is common between the different
-assignments. This reduce code duplication in each tutorial assignment, and
-allow us to hideaway code that is irrelevant or have been seen/introduced in
-earlier assignments.
diff --git a/src/xdp/common/common.mk b/src/xdp/common/common.mk
deleted file mode 100644
index ffb86a65c..000000000
--- a/src/xdp/common/common.mk
+++ /dev/null
@@ -1,103 +0,0 @@
-# Common Makefile parts for BPF-building with libbpf
-# --------------------------------------------------
-# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
-#
-# This file should be included from your Makefile like:
-# COMMON_DIR = ../common/
-# include $(COMMON_DIR)/common.mk
-#
-# It is expected that you define the variables:
-# XDP_TARGETS and USER_TARGETS
-# as a space-separated list
-#
-LLC ?= llc
-CLANG ?= clang
-CC ?= gcc
-
-XDP_C = ${XDP_TARGETS:=.c}
-XDP_OBJ = ${XDP_C:.c=.o}
-USER_C := ${USER_TARGETS:=.c}
-USER_OBJ := ${USER_C:.c=.o}
-
-# Expect this is defined by including Makefile, but define if not
-COMMON_DIR ?= ../common/
-
-COPY_LOADER ?=
-LOADER_DIR ?= $(COMMON_DIR)/../utils
-
-# Extend if including Makefile already added some
-COMMON_OBJS += $(COMMON_DIR)/common_params.o $(COMMON_DIR)/common_user_bpf_xdp.o
-
-# Create expansions for dependencies
-COMMON_H := ${COMMON_OBJS:.o=.h}
-
-EXTRA_DEPS +=
-
-# BPF-prog kern and userspace shares struct via header file:
-KERN_USER_H ?= $(wildcard common_kern_user.h)
-
-CFLAGS ?= -g -I../include/
-BPF_CFLAGS ?= -I../include/
-
-LIBS = -lbpf -lelf $(USER_LIBS)
-
-all: llvm-check $(USER_TARGETS) $(XDP_OBJ) $(COPY_LOADER) $(COPY_STATS)
-
-.PHONY: clean $(CLANG) $(LLC)
-
-clean:
- $(MAKE) -C $(COMMON_DIR) clean
- rm -f $(USER_TARGETS) $(XDP_OBJ) $(USER_OBJ) $(COPY_LOADER) $(COPY_STATS)
- rm -f *.ll
- rm -f *~
-
-ifdef COPY_LOADER
-$(COPY_LOADER): $(LOADER_DIR)/${COPY_LOADER:=.c} $(COMMON_H)
- make -C $(LOADER_DIR) $(COPY_LOADER)
- cp $(LOADER_DIR)/$(COPY_LOADER) $(COPY_LOADER)
-endif
-
-ifdef COPY_STATS
-$(COPY_STATS): $(LOADER_DIR)/${COPY_STATS:=.c} $(COMMON_H)
- make -C $(LOADER_DIR) $(COPY_STATS)
- cp $(LOADER_DIR)/$(COPY_STATS) $(COPY_STATS)
-# Needing xdp_stats imply depending on header files:
-EXTRA_DEPS += $(COMMON_DIR)/xdp_stats_kern.h $(COMMON_DIR)/xdp_stats_kern_user.h
-endif
-
-# For build dependency on this file, if it gets updated
-COMMON_MK = $(COMMON_DIR)/common.mk
-
-llvm-check: $(CLANG) $(LLC)
- @for TOOL in $^ ; do \
- if [ ! $$(command -v $${TOOL} 2>/dev/null) ]; then \
- echo "*** ERROR: Cannot find tool $${TOOL}" ;\
- exit 1; \
- else true; fi; \
- done
-
-# Create dependency: detect if C-file change and touch H-file, to trigger
-# target $(COMMON_OBJS)
-$(COMMON_H): %.h: %.c
- touch $@
-
-# Detect if any of common obj changed and create dependency on .h-files
-$(COMMON_OBJS): %.o: %.h
- make -C $(COMMON_DIR)
-
-$(USER_TARGETS): %: %.c Makefile $(COMMON_MK) $(COMMON_OBJS) $(KERN_USER_H) $(EXTRA_DEPS)
- $(CC) -Wall $(CFLAGS) $(LDFLAGS) -o $@ $(COMMON_OBJS) \
- $< $(LIBS)
-
-$(XDP_OBJ): %.o: %.c Makefile $(COMMON_MK) $(KERN_USER_H) $(EXTRA_DEPS)
- $(CLANG) -S \
- -target bpf \
- -D __BPF_TRACING__ \
- $(BPF_CFLAGS) \
- -Wall \
- -Wno-unused-value \
- -Wno-pointer-sign \
- -Wno-compare-distinct-pointer-types \
- -Werror \
- -O2 -emit-llvm -c -g -o ${@:.o=.ll} $<
- $(LLC) -march=bpf -filetype=obj -o $@ ${@:.o=.ll}
diff --git a/src/xdp/common/common_defines.h b/src/xdp/common/common_defines.h
deleted file mode 100644
index 2986d2d67..000000000
--- a/src/xdp/common/common_defines.h
+++ /dev/null
@@ -1,38 +0,0 @@
-#ifndef __COMMON_DEFINES_H
-#define __COMMON_DEFINES_H
-
-#include <net/if.h>
-#include <linux/types.h>
-#include <stdbool.h>
-
-struct config {
- __u32 xdp_flags;
- int ifindex;
- char *ifname;
- char ifname_buf[IF_NAMESIZE];
- int redirect_ifindex;
- char *redirect_ifname;
- char redirect_ifname_buf[IF_NAMESIZE];
- bool do_unload;
- bool reuse_maps;
- char pin_dir[512];
- char filename[512];
- char progsec[32];
- char src_mac[18];
- char dest_mac[18];
- __u16 xsk_bind_flags;
- int xsk_if_queue;
- bool xsk_poll_mode;
-};
-
-/* Defined in common_params.o */
-extern int verbose;
-
-/* Exit return codes */
-#define EXIT_OK 0 /* == EXIT_SUCCESS (stdlib.h) man exit(3) */
-#define EXIT_FAIL 1 /* == EXIT_FAILURE (stdlib.h) man exit(3) */
-#define EXIT_FAIL_OPTION 2
-#define EXIT_FAIL_XDP 30
-#define EXIT_FAIL_BPF 40
-
-#endif /* __COMMON_DEFINES_H */
diff --git a/src/xdp/common/common_libbpf.c b/src/xdp/common/common_libbpf.c
deleted file mode 100644
index 443ca4c66..000000000
--- a/src/xdp/common/common_libbpf.c
+++ /dev/null
@@ -1,161 +0,0 @@
-/* Common function that with time should be moved to libbpf */
-
-#include <errno.h>
-#include <string.h>
-
-#include <bpf/bpf.h>
-#include <bpf/libbpf.h>
-
-#include "common_libbpf.h"
-
-/* From: include/linux/err.h */
-#define MAX_ERRNO 4095
-#define IS_ERR_VALUE(x) ((x) >= (unsigned long)-MAX_ERRNO)
-static inline bool IS_ERR_OR_NULL(const void *ptr)
-{
- return (!ptr) || IS_ERR_VALUE((unsigned long)ptr);
-}
-
-#define pr_warning printf
-
-/* As close as possible to libbpf bpf_prog_load_xattr(), with the
- * difference of handling pinned maps.
- */
-int bpf_prog_load_xattr_maps(const struct bpf_prog_load_attr_maps *attr,
- struct bpf_object **pobj, int *prog_fd)
-{
- struct bpf_program *prog, *first_prog = NULL;
- enum bpf_attach_type expected_attach_type;
- enum bpf_prog_type prog_type;
- struct bpf_object *obj;
- struct bpf_map *map;
- int err;
- int i;
-
- if (!attr)
- return -EINVAL;
- if (!attr->file)
- return -EINVAL;
-
- obj = bpf_object__open_file(attr->file, NULL);
-
- if (libbpf_get_error(obj))
- return -EINVAL;
-
- prog = bpf_object__next_program(obj, NULL);
- bpf_program__set_type(prog, attr->prog_type);
-
- bpf_object__for_each_program(prog, obj) {
- /*
- * If type is not specified, try to guess it based on
- * section name.
- */
- prog_type = attr->prog_type;
- // Was: prog->prog_ifindex = attr->ifindex;
- bpf_program__set_ifindex(prog, attr->ifindex);
-
- expected_attach_type = attr->expected_attach_type;
-#if 0 /* Use internal libbpf variables */
- if (prog_type == BPF_PROG_TYPE_UNSPEC) {
- err = bpf_program__identify_section(prog, &prog_type,
- &expected_attach_type);
- if (err < 0) {
- bpf_object__close(obj);
- return -EINVAL;
- }
- }
-#endif
-
- bpf_program__set_type(prog, prog_type);
- bpf_program__set_expected_attach_type(prog,
- expected_attach_type);
-
- if (!first_prog)
- first_prog = prog;
- }
-
- /* Reset attr->pinned_maps.map_fd to identify successful file load */
- for (i = 0; i < attr->nr_pinned_maps; i++)
- attr->pinned_maps[i].map_fd = -1;
-
- bpf_map__for_each(map, obj) {
- const char* mapname = bpf_map__name(map);
-
- if (bpf_map__type(map) != BPF_MAP_TYPE_PERF_EVENT_ARRAY)
- bpf_map__set_ifindex(map, attr->ifindex);
- /* Was: map->map_ifindex = attr->ifindex; */
-
- for (i = 0; i < attr->nr_pinned_maps; i++) {
- struct bpf_pinned_map *pin_map = &attr->pinned_maps[i];
- int fd;
-
- if (strcmp(mapname, pin_map->name) != 0)
- continue;
-
- /* Matched, try opening pinned file */
- fd = bpf_obj_get(pin_map->filename);
- if (fd > 0) {
- /* Use FD from pinned map as replacement */
- bpf_map__reuse_fd(map, fd);
- /* TODO: Might want to set internal map "name"
- * if opened pinned map didn't, to allow
- * bpf_object__find_map_fd_by_name() to work.
- */
- pin_map->map_fd = fd;
- continue;
- }
- /* Could not open pinned filename map, then this prog
- * should then pin the map, BUT this can only happen
- * after bpf_object__load().
- */
- }
- }
-
- if (!first_prog) {
- pr_warning("object file doesn't contain bpf program\n");
- bpf_object__close(obj);
- return -ENOENT;
- }
-
- err = bpf_object__load(obj);
- if (err) {
- bpf_object__close(obj);
- return -EINVAL;
- }
-
- /* Pin the maps that were not loaded via pinned filename */
- bpf_map__for_each(map, obj) {
- const char* mapname = bpf_map__name(map);
-
- for (i = 0; i < attr->nr_pinned_maps; i++) {
- struct bpf_pinned_map *pin_map = &attr->pinned_maps[i];
- int err;
-
- if (strcmp(mapname, pin_map->name) != 0)
- continue;
-
- /* Matched, check if map is already loaded */
- if (pin_map->map_fd != -1)
- continue;
-
- /* Needs to be pinned */
- err = bpf_map__pin(map, pin_map->filename);
- if (err)
- continue;
- pin_map->map_fd = bpf_map__fd(map);
- }
- }
-
- /* Help user if requested map name that doesn't exist */
- for (i = 0; i < attr->nr_pinned_maps; i++) {
- struct bpf_pinned_map *pin_map = &attr->pinned_maps[i];
-
- if (pin_map->map_fd < 0)
- pr_warning("%s() requested mapname:%s not seen\n",
- __func__, pin_map->name);
- }
-
- *pobj = obj;
- *prog_fd = bpf_program__fd(first_prog);
- return 0;
-}
diff --git a/src/xdp/common/common_libbpf.h b/src/xdp/common/common_libbpf.h
deleted file mode 100644
index 4754bd8ca..000000000
--- a/src/xdp/common/common_libbpf.h
+++ /dev/null
@@ -1,24 +0,0 @@
-/* Common function that with time should be moved to libbpf */
-#ifndef __COMMON_LIBBPF_H
-#define __COMMON_LIBBPF_H
-
-struct bpf_pinned_map {
- const char *name;
- const char *filename;
- int map_fd;
-};
-
-/* bpf_prog_load_attr extended */
-struct bpf_prog_load_attr_maps {
- const char *file;
- enum bpf_prog_type prog_type;
- enum bpf_attach_type expected_attach_type;
- int ifindex;
- int nr_pinned_maps;
- struct bpf_pinned_map *pinned_maps;
-};
-
-int bpf_prog_load_xattr_maps(const struct bpf_prog_load_attr_maps *attr,
- struct bpf_object **pobj, int *prog_fd);
-
-#endif /* __COMMON_LIBBPF_H */
diff --git a/src/xdp/common/common_params.c b/src/xdp/common/common_params.c
deleted file mode 100644
index 642d56d92..000000000
--- a/src/xdp/common/common_params.c
+++ /dev/null
@@ -1,197 +0,0 @@
-#include <stddef.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <stdbool.h>
-#include <getopt.h>
-#include <errno.h>
-
-#include <net/if.h>
-#include <linux/if_link.h> /* XDP_FLAGS_* depend on kernel-headers installed */
-#include <linux/if_xdp.h>
-
-#include "common_params.h"
-
-int verbose = 1;
-
-#define BUFSIZE 30
-
-void _print_options(const struct option_wrapper *long_options, bool required)
-{
- int i, pos;
- char buf[BUFSIZE];
-
- for (i = 0; long_options[i].option.name != 0; i++) {
- if (long_options[i].required != required)
- continue;
-
- if (long_options[i].option.val > 64) /* ord('A') = 65 */
- printf(" -%c,", long_options[i].option.val);
- else
- printf(" ");
- pos = snprintf(buf, BUFSIZE, " --%s", long_options[i].option.name);
- if (long_options[i].metavar)
- snprintf(&buf[pos], BUFSIZE-pos, " %s", long_options[i].metavar);
- printf("%-22s", buf);
- printf(" %s", long_options[i].help);
- printf("\n");
- }
-}
-
-void usage(const char *prog_name, const char *doc,
- const struct option_wrapper *long_options, bool full)
-{
- printf("Usage: %s [options]\n", prog_name);
-
- if (!full) {
- printf("Use --help (or -h) to see full option list.\n");
- return;
- }
-
- printf("\nDOCUMENTATION:\n %s\n", doc);
- printf("Required options:\n");
- _print_options(long_options, true);
- printf("\n");
- printf("Other options:\n");
- _print_options(long_options, false);
- printf("\n");
-}
-
-int option_wrappers_to_options(const struct option_wrapper *wrapper,
- struct option **options)
-{
- int i, num;
- struct option *new_options;
- for (i = 0; wrapper[i].option.name != 0; i++) {}
- num = i;
-
- new_options = malloc(sizeof(struct option) * num);
- if (!new_options)
- return -1;
- for (i = 0; i < num; i++) {
- memcpy(&new_options[i], &wrapper[i], sizeof(struct option));
- }
-
- *options = new_options;
- return 0;
-}
-
-void parse_cmdline_args(int argc, char **argv,
- const struct option_wrapper *options_wrapper,
- struct config *cfg, const char *doc)
-{
- struct option *long_options;
- bool full_help = false;
- int longindex = 0;
- char *dest;
- int opt;
-
- if (option_wrappers_to_options(options_wrapper, &long_options)) {
- fprintf(stderr, "Unable to malloc()\n");
- exit(EXIT_FAIL_OPTION);
- }
-
- /* Parse commands line args */
- while ((opt = getopt_long(argc, argv, "hd:r:L:R:ASNFUMQ:czpq",
- long_options, &longindex)) != -1) {
- switch (opt) {
- case 'd':
- if (strlen(optarg) >= IF_NAMESIZE) {
- fprintf(stderr, "ERR: --dev name too long\n");
- goto error;
- }
- cfg->ifname = (char *)&cfg->ifname_buf;
- strncpy(cfg->ifname, optarg, IF_NAMESIZE);
- cfg->ifindex = if_nametoindex(cfg->ifname);
- if (cfg->ifindex == 0) {
- fprintf(stderr,
- "ERR: --dev name unknown err(%d):%s\n",
- errno, strerror(errno));
- goto error;
- }
- break;
- case 'r':
- if (strlen(optarg) >= IF_NAMESIZE) {
- fprintf(stderr, "ERR: --redirect-dev name too long\n");
- goto error;
- }
- cfg->redirect_ifname = (char *)&cfg->redirect_ifname_buf;
- strncpy(cfg->redirect_ifname, optarg, IF_NAMESIZE);
- cfg->redirect_ifindex = if_nametoindex(cfg->redirect_ifname);
- if (cfg->redirect_ifindex == 0) {
- fprintf(stderr,
- "ERR: --redirect-dev name unknown err(%d):%s\n",
- errno, strerror(errno));
- goto error;
- }
- break;
- case 'A':
- cfg->xdp_flags &= ~XDP_FLAGS_MODES; /* Clear flags */
- break;
- case 'S':
- cfg->xdp_flags &= ~XDP_FLAGS_MODES; /* Clear flags */
- cfg->xdp_flags |= XDP_FLAGS_SKB_MODE; /* Set flag */
- cfg->xsk_bind_flags &= XDP_ZEROCOPY;
- cfg->xsk_bind_flags |= XDP_COPY;
- break;
- case 'N':
- cfg->xdp_flags &= ~XDP_FLAGS_MODES; /* Clear flags */
- cfg->xdp_flags |= XDP_FLAGS_DRV_MODE; /* Set flag */
- break;
- case 3: /* --offload-mode */
- cfg->xdp_flags &= ~XDP_FLAGS_MODES; /* Clear flags */
- cfg->xdp_flags |= XDP_FLAGS_HW_MODE; /* Set flag */
- break;
- case 'F':
- cfg->xdp_flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST;
- break;
- case 'M':
- cfg->reuse_maps = true;
- break;
- case 'U':
- cfg->do_unload = true;
- break;
- case 'p':
- cfg->xsk_poll_mode = true;
- break;
- case 'q':
- verbose = false;
- break;
- case 'Q':
- cfg->xsk_if_queue = atoi(optarg);
- break;
- case 1: /* --filename */
- dest = (char *)&cfg->filename;
- strncpy(dest, optarg, sizeof(cfg->filename));
- break;
- case 2: /* --progsec */
- dest = (char *)&cfg->progsec;
- strncpy(dest, optarg, sizeof(cfg->progsec));
- break;
- case 'L': /* --src-mac */
- dest = (char *)&cfg->src_mac;
- strncpy(dest, optarg, sizeof(cfg->src_mac));
- break;
- case 'R': /* --dest-mac */
- dest = (char *)&cfg->dest_mac;
- strncpy(dest, optarg, sizeof(cfg->dest_mac));
- case 'c':
- cfg->xsk_bind_flags &= XDP_ZEROCOPY;
- cfg->xsk_bind_flags |= XDP_COPY;
- break;
- case 'z':
- cfg->xsk_bind_flags &= XDP_COPY;
- cfg->xsk_bind_flags |= XDP_ZEROCOPY;
- break;
- case 'h':
- full_help = true;
- /* fall-through */
- error:
- default:
- usage(argv[0], doc, options_wrapper, full_help);
- free(long_options);
- exit(EXIT_FAIL_OPTION);
- }
- }
- free(long_options);
-}
diff --git a/src/xdp/common/common_params.h b/src/xdp/common/common_params.h
deleted file mode 100644
index 6f64c82e3..000000000
--- a/src/xdp/common/common_params.h
+++ /dev/null
@@ -1,22 +0,0 @@
-/* This common_user.h is used by userspace programs */
-#ifndef __COMMON_PARAMS_H
-#define __COMMON_PARAMS_H
-
-#include <getopt.h>
-#include "common_defines.h"
-
-struct option_wrapper {
- struct option option;
- char *help;
- char *metavar;
- bool required;
-};
-
-void usage(const char *prog_name, const char *doc,
- const struct option_wrapper *long_options, bool full);
-
-void parse_cmdline_args(int argc, char **argv,
- const struct option_wrapper *long_options,
- struct config *cfg, const char *doc);
-
-#endif /* __COMMON_PARAMS_H */
diff --git a/src/xdp/common/common_user_bpf_xdp.c b/src/xdp/common/common_user_bpf_xdp.c
deleted file mode 100644
index 524f08c9d..000000000
--- a/src/xdp/common/common_user_bpf_xdp.c
+++ /dev/null
@@ -1,389 +0,0 @@
-#include <bpf/libbpf.h> /* bpf_get_link_xdp_id + bpf_set_link_xdp_id */
-#include <string.h> /* strerror */
-#include <net/if.h> /* IF_NAMESIZE */
-#include <stdlib.h> /* exit(3) */
-#include <errno.h>
-
-#include <bpf/bpf.h>
-#include <bpf/libbpf.h>
-
-#include <linux/if_link.h> /* Need XDP flags */
-#include <linux/err.h>
-
-#include "common_defines.h"
-
-#ifndef PATH_MAX
-#define PATH_MAX 4096
-#endif
-
-int xdp_link_attach(int ifindex, __u32 xdp_flags, int prog_fd)
-{
- int err;
-
- /* libbpf provide the XDP net_device link-level hook attach helper */
- err = bpf_xdp_attach(ifindex, prog_fd, xdp_flags, NULL);
- if (err == -EEXIST && !(xdp_flags & XDP_FLAGS_UPDATE_IF_NOEXIST)) {
- /* Force mode didn't work, probably because a program of the
- * opposite type is loaded. Let's unload that and try loading
- * again.
- */
-
- __u32 old_flags = xdp_flags;
-
- xdp_flags &= ~XDP_FLAGS_MODES;
- xdp_flags |= (old_flags & XDP_FLAGS_SKB_MODE) ? XDP_FLAGS_DRV_MODE : XDP_FLAGS_SKB_MODE;
- err = bpf_xdp_detach(ifindex, xdp_flags, NULL);
- if (!err)
- err = bpf_xdp_attach(ifindex, prog_fd, old_flags, NULL);
- }
- if (err < 0) {
- fprintf(stderr, "ERR: "
- "ifindex(%d) link set xdp fd failed (%d): %s\n",
- ifindex, -err, strerror(-err));
-
- switch (-err) {
- case EBUSY:
- case EEXIST:
- fprintf(stderr, "Hint: XDP already loaded on device"
- " use --force to swap/replace\n");
- break;
- case EOPNOTSUPP:
- fprintf(stderr, "Hint: Native-XDP not supported"
- " use --skb-mode or --auto-mode\n");
- break;
- default:
- break;
- }
- return EXIT_FAIL_XDP;
- }
-
- return EXIT_OK;
-}
-
-int xdp_link_detach(int ifindex, __u32 xdp_flags, __u32 expected_prog_id)
-{
- __u32 curr_prog_id;
- int err;
-
- err = bpf_xdp_query_id(ifindex, xdp_flags, &curr_prog_id);
- if (err) {
- fprintf(stderr, "ERR: get link xdp id failed (err=%d): %s\n",
- -err, strerror(-err));
- return EXIT_FAIL_XDP;
- }
-
- if (!curr_prog_id) {
- if (verbose)
- printf("INFO: %s() no curr XDP prog on ifindex:%d\n",
- __func__, ifindex);
- return EXIT_OK;
- }
-
- if (expected_prog_id && curr_prog_id != expected_prog_id) {
- fprintf(stderr, "ERR: %s() "
- "expected prog ID(%d) no match(%d), not removing\n",
- __func__, expected_prog_id, curr_prog_id);
- return EXIT_FAIL;
- }
-
- if ((err = bpf_xdp_detach(ifindex, xdp_flags, NULL)) < 0) {
- fprintf(stderr, "ERR: %s() link set xdp failed (err=%d): %s\n",
- __func__, err, strerror(-err));
- return EXIT_FAIL_XDP;
- }
-
- if (verbose)
- printf("INFO: %s() removed XDP prog ID:%d on ifindex:%d\n",
- __func__, curr_prog_id, ifindex);
-
- return EXIT_OK;
-}
-
-struct bpf_object *load_bpf_object_file(const char *filename, int ifindex)
-{
- int first_prog_fd = -1;
- struct bpf_object *obj;
- int err;
-
- /* This struct allow us to set ifindex, this features is used for
- * hardware offloading XDP programs (note this sets libbpf
- * bpf_program->prog_ifindex and foreach bpf_map->map_ifindex).
- */
- struct bpf_program *prog;
- obj = bpf_object__open_file(filename, NULL);
-
- if (libbpf_get_error(obj))
- return NULL;
-
- prog = bpf_object__next_program(obj, NULL);
- bpf_program__set_type(prog, BPF_PROG_TYPE_XDP);
- bpf_program__set_ifindex(prog, ifindex);
-
- /* Use libbpf for extracting BPF byte-code from BPF-ELF object, and
- * loading this into the kernel via bpf-syscall
- */
- err = bpf_object__load(obj);
- if (err) {
- fprintf(stderr, "ERR: loading BPF-OBJ file(%s) (%d): %s\n",
- filename, err, strerror(-err));
- return NULL;
- }
-
- first_prog_fd = bpf_program__fd(prog);
-
- /* Notice how a pointer to a libbpf bpf_object is returned */
- return obj;
-}
-
-static struct bpf_object *open_bpf_object(const char *file, int ifindex)
-{
- int err;
- struct bpf_object *obj;
- struct bpf_map *map;
- struct bpf_program *prog, *first_prog = NULL;
-
- obj = bpf_object__open_file(file, NULL);
-
- if (libbpf_get_error(obj))
- return NULL;
-
- prog = bpf_object__next_program(obj, NULL);
- bpf_program__set_type(prog, BPF_PROG_TYPE_XDP);
-
- err = bpf_object__load(obj);
- if (IS_ERR_OR_NULL(obj)) {
- err = -PTR_ERR(obj);
- fprintf(stderr, "ERR: opening BPF-OBJ file(%s) (%d): %s\n",
- file, err, strerror(-err));
- return NULL;
- }
-
- bpf_object__for_each_program(prog, obj) {
- bpf_program__set_type(prog, BPF_PROG_TYPE_XDP);
- bpf_program__set_ifindex(prog, ifindex);
- if (!first_prog)
- first_prog = prog;
- }
-
- bpf_object__for_each_map(map, obj) {
- if (bpf_map__type(map) != BPF_MAP_TYPE_PERF_EVENT_ARRAY)
- bpf_map__set_ifindex(map, ifindex);
- }
-
- if (!first_prog) {
- fprintf(stderr, "ERR: file %s contains no programs\n", file);
- return NULL;
- }
-
- return obj;
-}
-
-static int reuse_maps(struct bpf_object *obj, const char *path)
-{
- struct bpf_map *map;
-
- if (!obj)
- return -ENOENT;
-
- if (!path)
- return -EINVAL;
-
- bpf_object__for_each_map(map, obj) {
- int len, err;
- int pinned_map_fd;
- char buf[PATH_MAX];
-
- len = snprintf(buf, PATH_MAX, "%s/%s", path, bpf_map__name(map));
- if (len < 0) {
- return -EINVAL;
- } else if (len >= PATH_MAX) {
- return -ENAMETOOLONG;
- }
-
- pinned_map_fd = bpf_obj_get(buf);
- if (pinned_map_fd < 0)
- return pinned_map_fd;
-
- err = bpf_map__reuse_fd(map, pinned_map_fd);
- if (err)
- return err;
- }
-
- return 0;
-}
-
-struct bpf_object *load_bpf_object_file_reuse_maps(const char *file,
- int ifindex,
- const char *pin_dir)
-{
- int err;
- struct bpf_object *obj;
-
- obj = open_bpf_object(file, ifindex);
- if (!obj) {
- fprintf(stderr, "ERR: failed to open object %s\n", file);
- return NULL;
- }
-
- err = reuse_maps(obj, pin_dir);
- if (err) {
- fprintf(stderr, "ERR: failed to reuse maps for object %s, pin_dir=%s\n",
- file, pin_dir);
- return NULL;
- }
-
- err = bpf_object__load(obj);
- if (err) {
- fprintf(stderr, "ERR: loading BPF-OBJ file(%s) (%d): %s\n",
- file, err, strerror(-err));
- return NULL;
- }
-
- return obj;
-}
-
-struct bpf_object *load_bpf_and_xdp_attach(struct config *cfg)
-{
- struct bpf_program *bpf_prog;
- struct bpf_object *bpf_obj;
- int offload_ifindex = 0;
- int prog_fd = -1;
- int err;
-
- /* If flags indicate hardware offload, supply ifindex */
- if (cfg->xdp_flags & XDP_FLAGS_HW_MODE)
- offload_ifindex = cfg->ifindex;
-
- /* Load the BPF-ELF object file and get back libbpf bpf_object */
- if (cfg->reuse_maps)
- bpf_obj = load_bpf_object_file_reuse_maps(cfg->filename,
- offload_ifindex,
- cfg->pin_dir);
- else
- bpf_obj = load_bpf_object_file(cfg->filename, offload_ifindex);
- if (!bpf_obj) {
- fprintf(stderr, "ERR: loading file: %s\n", cfg->filename);
- exit(EXIT_FAIL_BPF);
- }
- /* At this point: All XDP/BPF programs from the cfg->filename have been
- * loaded into the kernel, and evaluated by the verifier. Only one of
- * these gets attached to XDP hook, the others will get freed once this
- * process exit.
- */
-
- if (cfg->progsec[0])
- /* Find a matching BPF prog section name */
- bpf_prog = bpf_object__find_program_by_name(bpf_obj, cfg->progsec);
- else
- /* Find the first program */
- bpf_prog = bpf_object__next_program(bpf_obj, NULL);
-
- if (!bpf_prog) {
- fprintf(stderr, "ERR: couldn't find a program in ELF section '%s'\n", cfg->progsec);
- exit(EXIT_FAIL_BPF);
- }
-
- strncpy(cfg->progsec, bpf_program__section_name(bpf_prog), sizeof(cfg->progsec));
-
- prog_fd = bpf_program__fd(bpf_prog);
- if (prog_fd <= 0) {
- fprintf(stderr, "ERR: bpf_program__fd failed\n");
- exit(EXIT_FAIL_BPF);
- }
-
- /* At this point: BPF-progs are (only) loaded by the kernel, and prog_fd
- * is our select file-descriptor handle. Next step is attaching this FD
- * to a kernel hook point, in this case XDP net_device link-level hook.
- */
- err = xdp_link_attach(cfg->ifindex, cfg->xdp_flags, prog_fd);
- if (err)
- exit(err);
-
- return bpf_obj;
-}
-
-#define XDP_UNKNOWN XDP_REDIRECT + 1
-#ifndef XDP_ACTION_MAX
-#define XDP_ACTION_MAX (XDP_UNKNOWN + 1)
-#endif
-
-static const char *xdp_action_names[XDP_ACTION_MAX] = {
- [XDP_ABORTED] = "XDP_ABORTED",
- [XDP_DROP] = "XDP_DROP",
- [XDP_PASS] = "XDP_PASS",
- [XDP_TX] = "XDP_TX",
- [XDP_REDIRECT] = "XDP_REDIRECT",
- [XDP_UNKNOWN] = "XDP_UNKNOWN",
-};
-
-const char *action2str(__u32 action)
-{
- if (action < XDP_ACTION_MAX)
- return xdp_action_names[action];
- return NULL;
-}
-
-int check_map_fd_info(const struct bpf_map_info *info,
- const struct bpf_map_info *exp)
-{
- if (exp->key_size && exp->key_size != info->key_size) {
- fprintf(stderr, "ERR: %s() "
- "Map key size(%d) mismatch expected size(%d)\n",
- __func__, info->key_size, exp->key_size);
- return EXIT_FAIL;
- }
- if (exp->value_size && exp->value_size != info->value_size) {
- fprintf(stderr, "ERR: %s() "
- "Map value size(%d) mismatch expected size(%d)\n",
- __func__, info->value_size, exp->value_size);
- return EXIT_FAIL;
- }
- if (exp->max_entries && exp->max_entries != info->max_entries) {
- fprintf(stderr, "ERR: %s() "
- "Map max_entries(%d) mismatch expected size(%d)\n",
- __func__, info->max_entries, exp->max_entries);
- return EXIT_FAIL;
- }
- if (exp->type && exp->type != info->type) {
- fprintf(stderr, "ERR: %s() "
- "Map type(%d) mismatch expected type(%d)\n",
- __func__, info->type, exp->type);
- return EXIT_FAIL;
- }
-
- return 0;
-}
-
-int open_bpf_map_file(const char *pin_dir,
- const char *mapname,
- struct bpf_map_info *info)
-{
- char filename[PATH_MAX];
- int err, len, fd;
- __u32 info_len = sizeof(*info);
-
- len = snprintf(filename, PATH_MAX, "%s/%s", pin_dir, mapname);
- if (len < 0) {
- fprintf(stderr, "ERR: constructing full mapname path\n");
- return -1;
- }
-
- fd = bpf_obj_get(filename);
- if (fd < 0) {
- fprintf(stderr,
- "WARN: Failed to open bpf map file:%s err(%d):%s\n",
- filename, errno, strerror(errno));
- return fd;
- }
-
- if (info) {
- err = bpf_obj_get_info_by_fd(fd, info, &info_len);
- if (err) {
- fprintf(stderr, "ERR: %s() can't get info - %s\n",
- __func__, strerror(errno));
- return EXIT_FAIL_BPF;
- }
- }
-
- return fd;
-}
diff --git a/src/xdp/common/common_user_bpf_xdp.h b/src/xdp/common/common_user_bpf_xdp.h
deleted file mode 100644
index 4f8aa51d4..000000000
--- a/src/xdp/common/common_user_bpf_xdp.h
+++ /dev/null
@@ -1,20 +0,0 @@
-/* Common BPF/XDP functions used by userspace side programs */
-#ifndef __COMMON_USER_BPF_XDP_H
-#define __COMMON_USER_BPF_XDP_H
-
-int xdp_link_attach(int ifindex, __u32 xdp_flags, int prog_fd);
-int xdp_link_detach(int ifindex, __u32 xdp_flags, __u32 expected_prog_id);
-
-struct bpf_object *load_bpf_object_file(const char *filename, int ifindex);
-struct bpf_object *load_bpf_and_xdp_attach(struct config *cfg);
-
-const char *action2str(__u32 action);
-
-int check_map_fd_info(const struct bpf_map_info *info,
- const struct bpf_map_info *exp);
-
-int open_bpf_map_file(const char *pin_dir,
- const char *mapname,
- struct bpf_map_info *info);
-
-#endif /* __COMMON_USER_BPF_XDP_H */
diff --git a/src/xdp/common/parsing_helpers.h b/src/xdp/common/parsing_helpers.h
deleted file mode 100644
index c0837e88f..000000000
--- a/src/xdp/common/parsing_helpers.h
+++ /dev/null
@@ -1,244 +0,0 @@
-/* SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-clause) */
-/*
- * This file contains parsing functions that are used in the packetXX XDP
- * programs. The functions are marked as __always_inline, and fully defined in
- * this header file to be included in the BPF program.
- *
- * Each helper parses a packet header, including doing bounds checking, and
- * returns the type of its contents if successful, and -1 otherwise.
- *
- * For Ethernet and IP headers, the content type is the type of the payload
- * (h_proto for Ethernet, nexthdr for IPv6), for ICMP it is the ICMP type field.
- * All return values are in host byte order.
- *
- * The versions of the functions included here are slightly expanded versions of
- * the functions in the packet01 lesson. For instance, the Ethernet header
- * parsing has support for parsing VLAN tags.
- */
-
-#ifndef __PARSING_HELPERS_H
-#define __PARSING_HELPERS_H
-
-#include <stddef.h>
-#include <linux/if_ether.h>
-#include <linux/if_packet.h>
-#include <linux/ip.h>
-#include <linux/ipv6.h>
-#include <linux/icmp.h>
-#include <linux/icmpv6.h>
-#include <linux/udp.h>
-#include <linux/tcp.h>
-
-/* Header cursor to keep track of current parsing position */
-struct hdr_cursor {
- void *pos;
-};
-
-/*
- * struct vlan_hdr - vlan header
- * @h_vlan_TCI: priority and VLAN ID
- * @h_vlan_encapsulated_proto: packet type ID or len
- */
-struct vlan_hdr {
- __be16 h_vlan_TCI;
- __be16 h_vlan_encapsulated_proto;
-};
-
-/*
- * Struct icmphdr_common represents the common part of the icmphdr and icmp6hdr
- * structures.
- */
-struct icmphdr_common {
- __u8 type;
- __u8 code;
- __sum16 cksum;
-};
-
-/* Allow users of header file to redefine VLAN max depth */
-#ifndef VLAN_MAX_DEPTH
-#define VLAN_MAX_DEPTH 4
-#endif
-
-static __always_inline int proto_is_vlan(__u16 h_proto)
-{
- return !!(h_proto == bpf_htons(ETH_P_8021Q) ||
- h_proto == bpf_htons(ETH_P_8021AD));
-}
-
-/* Notice, parse_ethhdr() will skip VLAN tags, by advancing nh->pos and returns
- * next header EtherType, BUT the ethhdr pointer supplied still points to the
- * Ethernet header. Thus, caller can look at eth->h_proto to see if this was a
- * VLAN tagged packet.
- */
-static __always_inline int parse_ethhdr(struct hdr_cursor *nh, void *data_end,
- struct ethhdr **ethhdr)
-{
- struct ethhdr *eth = nh->pos;
- int hdrsize = sizeof(*eth);
- struct vlan_hdr *vlh;
- __u16 h_proto;
- int i;
-
- /* Byte-count bounds check; check if current pointer + size of header
- * is after data_end.
- */
- if (nh->pos + hdrsize > data_end)
- return -1;
-
- nh->pos += hdrsize;
- *ethhdr = eth;
- vlh = nh->pos;
- h_proto = eth->h_proto;
-
- /* Use loop unrolling to avoid the verifier restriction on loops;
- * support up to VLAN_MAX_DEPTH layers of VLAN encapsulation.
- */
- #pragma unroll
- for (i = 0; i < VLAN_MAX_DEPTH; i++) {
- if (!proto_is_vlan(h_proto))
- break;
-
- if (vlh + 1 > data_end)
- break;
-
- h_proto = vlh->h_vlan_encapsulated_proto;
- vlh++;
- }
-
- nh->pos = vlh;
- return h_proto; /* network-byte-order */
-}
-
-static __always_inline int parse_ip6hdr(struct hdr_cursor *nh,
- void *data_end,
- struct ipv6hdr **ip6hdr)
-{
- struct ipv6hdr *ip6h = nh->pos;
-
- /* Pointer-arithmetic bounds check; pointer +1 points to after end of
- * thing being pointed to. We will be using this style in the remainder
- * of the tutorial.
- */
- if (ip6h + 1 > data_end)
- return -1;
-
- nh->pos = ip6h + 1;
- *ip6hdr = ip6h;
-
- return ip6h->nexthdr;
-}
-
-static __always_inline int parse_iphdr(struct hdr_cursor *nh,
- void *data_end,
- struct iphdr **iphdr)
-{
- struct iphdr *iph = nh->pos;
- int hdrsize;
-
- if (iph + 1 > data_end)
- return -1;
-
- hdrsize = iph->ihl * 4;
-
- /* Variable-length IPv4 header, need to use byte-based arithmetic */
- if (nh->pos + hdrsize > data_end)
- return -1;
-
- nh->pos += hdrsize;
- *iphdr = iph;
-
- return iph->protocol;
-}
-
-static __always_inline int parse_icmp6hdr(struct hdr_cursor *nh,
- void *data_end,
- struct icmp6hdr **icmp6hdr)
-{
- struct icmp6hdr *icmp6h = nh->pos;
-
- if (icmp6h + 1 > data_end)
- return -1;
-
- nh->pos = icmp6h + 1;
- *icmp6hdr = icmp6h;
-
- return icmp6h->icmp6_type;
-}
-
-static __always_inline int parse_icmphdr(struct hdr_cursor *nh,
- void *data_end,
- struct icmphdr **icmphdr)
-{
- struct icmphdr *icmph = nh->pos;
-
- if (icmph + 1 > data_end)
- return -1;
-
- nh->pos = icmph + 1;
- *icmphdr = icmph;
-
- return icmph->type;
-}
-
-static __always_inline int parse_icmphdr_common(struct hdr_cursor *nh,
- void *data_end,
- struct icmphdr_common **icmphdr)
-{
- struct icmphdr_common *h = nh->pos;
-
- if (h + 1 > data_end)
- return -1;
-
- nh->pos = h + 1;
- *icmphdr = h;
-
- return h->type;
-}
-
-/*
- * parse_udphdr: parse the udp header and return the length of the udp payload
- */
-static __always_inline int parse_udphdr(struct hdr_cursor *nh,
- void *data_end,
- struct udphdr **udphdr)
-{
- int len;
- struct udphdr *h = nh->pos;
-
- if (h + 1 > data_end)
- return -1;
-
- nh->pos = h + 1;
- *udphdr = h;
-
- len = bpf_ntohs(h->len) - sizeof(struct udphdr);
- if (len < 0)
- return -1;
-
- return len;
-}
-
-/*
- * parse_tcphdr: parse and return the length of the tcp header
- */
-static __always_inline int parse_tcphdr(struct hdr_cursor *nh,
- void *data_end,
- struct tcphdr **tcphdr)
-{
- int len;
- struct tcphdr *h = nh->pos;
-
- if (h + 1 > data_end)
- return -1;
-
- len = h->doff * 4;
- if ((void *) h + len > data_end)
- return -1;
-
- nh->pos = h + 1;
- *tcphdr = h;
-
- return len;
-}
-
-#endif /* __PARSING_HELPERS_H */
diff --git a/src/xdp/common/rewrite_helpers.h b/src/xdp/common/rewrite_helpers.h
deleted file mode 100644
index a5d3e671d..000000000
--- a/src/xdp/common/rewrite_helpers.h
+++ /dev/null
@@ -1,144 +0,0 @@
-/* SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-clause) */
-/*
- * This file contains functions that are used in the packetXX XDP programs to
- * manipulate on packets data. The functions are marked as __always_inline, and
- * fully defined in this header file to be included in the BPF program.
- */
-
-#ifndef __REWRITE_HELPERS_H
-#define __REWRITE_HELPERS_H
-
-#include <linux/bpf.h>
-#include <linux/ip.h>
-#include <linux/ipv6.h>
-#include <linux/if_ether.h>
-
-#include <bpf/bpf_helpers.h>
-#include <bpf/bpf_endian.h>
-
-/* Pops the outermost VLAN tag off the packet. Returns the popped VLAN ID on
- * success or negative errno on failure.
- */
-static __always_inline int vlan_tag_pop(struct xdp_md *ctx, struct ethhdr *eth)
-{
- void *data_end = (void *)(long)ctx->data_end;
- struct ethhdr eth_cpy;
- struct vlan_hdr *vlh;
- __be16 h_proto;
- int vlid;
-
- if (!proto_is_vlan(eth->h_proto))
- return -1;
-
- /* Careful with the parenthesis here */
- vlh = (void *)(eth + 1);
-
- /* Still need to do bounds checking */
- if (vlh + 1 > data_end)
- return -1;
-
- /* Save vlan ID for returning, h_proto for updating Ethernet header */
- vlid = bpf_ntohs(vlh->h_vlan_TCI);
- h_proto = vlh->h_vlan_encapsulated_proto;
-
- /* Make a copy of the outer Ethernet header before we cut it off */
- __builtin_memcpy(&eth_cpy, eth, sizeof(eth_cpy));
-
- /* Actually adjust the head pointer */
- if (bpf_xdp_adjust_head(ctx, (int)sizeof(*vlh)))
- return -1;
-
- /* Need to re-evaluate data *and* data_end and do new bounds checking
- * after adjusting head
- */
- eth = (void *)(long)ctx->data;
- data_end = (void *)(long)ctx->data_end;
- if (eth + 1 > data_end)
- return -1;
-
- /* Copy back the old Ethernet header and update the proto type */
- __builtin_memcpy(eth, &eth_cpy, sizeof(*eth));
- eth->h_proto = h_proto;
-
- return vlid;
-}
-
-/* Pushes a new VLAN tag after the Ethernet header. Returns 0 on success,
- * -1 on failure.
- */
-static __always_inline int vlan_tag_push(struct xdp_md *ctx,
- struct ethhdr *eth, int vlid)
-{
- void *data_end = (void *)(long)ctx->data_end;
- struct ethhdr eth_cpy;
- struct vlan_hdr *vlh;
-
- /* First copy the original Ethernet header */
- __builtin_memcpy(&eth_cpy, eth, sizeof(eth_cpy));
-
- /* Then add space in front of the packet */
- if (bpf_xdp_adjust_head(ctx, 0 - (int)sizeof(*vlh)))
- return -1;
-
- /* Need to re-evaluate data_end and data after head adjustment, and
- * bounds check, even though we know there is enough space (as we
- * increased it).
- */
- data_end = (void *)(long)ctx->data_end;
- eth = (void *)(long)ctx->data;
-
- if (eth + 1 > data_end)
- return -1;
-
- /* Copy back Ethernet header in the right place, populate VLAN tag with
- * ID and proto, and set outer Ethernet header to VLAN type.
- */
- __builtin_memcpy(eth, &eth_cpy, sizeof(*eth));
-
- vlh = (void *)(eth + 1);
-
- if (vlh + 1 > data_end)
- return -1;
-
- vlh->h_vlan_TCI = bpf_htons(vlid);
- vlh->h_vlan_encapsulated_proto = eth->h_proto;
-
- eth->h_proto = bpf_htons(ETH_P_8021Q);
- return 0;
-}
-
-/*
- * Swaps destination and source MAC addresses inside an Ethernet header
- */
-static __always_inline void swap_src_dst_mac(struct ethhdr *eth)
-{
- __u8 h_tmp[ETH_ALEN];
-
- __builtin_memcpy(h_tmp, eth->h_source, ETH_ALEN);
- __builtin_memcpy(eth->h_source, eth->h_dest, ETH_ALEN);
- __builtin_memcpy(eth->h_dest, h_tmp, ETH_ALEN);
-}
-
-/*
- * Swaps destination and source IPv6 addresses inside an IPv6 header
- */
-static __always_inline void swap_src_dst_ipv6(struct ipv6hdr *ipv6)
-{
- struct in6_addr tmp = ipv6->saddr;
-
- ipv6->saddr = ipv6->daddr;
- ipv6->daddr = tmp;
-}
-
-/*
- * Swaps destination and source IPv4 addresses inside an IPv4 header
- */
-static __always_inline void swap_src_dst_ipv4(struct iphdr *iphdr)
-{
- __be32 tmp = iphdr->saddr;
-
- iphdr->saddr = iphdr->daddr;
- iphdr->daddr = tmp;
-}
-
-#endif /* __REWRITE_HELPERS_H */
diff --git a/src/xdp/common/xdp_stats_kern.h b/src/xdp/common/xdp_stats_kern.h
deleted file mode 100644
index c061a149d..000000000
--- a/src/xdp/common/xdp_stats_kern.h
+++ /dev/null
@@ -1,44 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-
-/* Used *ONLY* by BPF-prog running kernel side. */
-#ifndef __XDP_STATS_KERN_H
-#define __XDP_STATS_KERN_H
-
-/* Data record type 'struct datarec' is defined in common/xdp_stats_kern_user.h,
- * programs using this header must first include that file.
- */
-#ifndef __XDP_STATS_KERN_USER_H
-#warning "You forgot to #include <../common/xdp_stats_kern_user.h>"
-#include <../common/xdp_stats_kern_user.h>
-#endif
-
-/* Keeps stats per (enum) xdp_action */
-struct {
- __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY);
- __type(key, __u32);
- __type(value, struct datarec);
- __uint(max_entries, XDP_ACTION_MAX);
-} xdp_stats_map SEC(".maps");
-
-static __always_inline
-__u32 xdp_stats_record_action(struct xdp_md *ctx, __u32 action)
-{
- if (action >= XDP_ACTION_MAX)
- return XDP_ABORTED;
-
- /* Lookup in kernel BPF-side return pointer to actual data record */
- struct datarec *rec = bpf_map_lookup_elem(&xdp_stats_map, &action);
- if (!rec)
- return XDP_ABORTED;
-
- /* BPF_MAP_TYPE_PERCPU_ARRAY returns a data record specific to current
- * CPU and XDP hooks runs under Softirq, which makes it safe to update
- * without atomic operations.
- */
- rec->rx_packets++;
- rec->rx_bytes += (ctx->data_end - ctx->data);
-
- return action;
-}
-
-#endif /* __XDP_STATS_KERN_H */
diff --git a/src/xdp/common/xdp_stats_kern_user.h b/src/xdp/common/xdp_stats_kern_user.h
deleted file mode 100644
index d7b8d05e6..000000000
--- a/src/xdp/common/xdp_stats_kern_user.h
+++ /dev/null
@@ -1,19 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-
-/* Used by BPF-prog kernel side BPF-progs and userspace programs,
- * for sharing xdp_stats common struct and DEFINEs.
- */
-#ifndef __XDP_STATS_KERN_USER_H
-#define __XDP_STATS_KERN_USER_H
-
-/* This is the data record stored in the map */
-struct datarec {
- __u64 rx_packets;
- __u64 rx_bytes;
-};
-
-#ifndef XDP_ACTION_MAX
-#define XDP_ACTION_MAX (XDP_REDIRECT + 1)
-#endif
-
-#endif /* __XDP_STATS_KERN_USER_H */
diff --git a/src/xdp/include/bpf_endian.h b/src/xdp/include/bpf_endian.h
deleted file mode 100644
index 2b0ede3d5..000000000
--- a/src/xdp/include/bpf_endian.h
+++ /dev/null
@@ -1,58 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/* Copied from $(LINUX)/tools/testing/selftests/bpf/bpf_endian.h */
-#ifndef __BPF_ENDIAN__
-#define __BPF_ENDIAN__
-
-#include <linux/swab.h>
-
-/* LLVM's BPF target selects the endianness of the CPU
- * it compiles on, or the user specifies (bpfel/bpfeb),
- * respectively. The used __BYTE_ORDER__ is defined by
- * the compiler, we cannot rely on __BYTE_ORDER from
- * libc headers, since it doesn't reflect the actual
- * requested byte order.
- *
- * Note, LLVM's BPF target has different __builtin_bswapX()
- * semantics. It does map to BPF_ALU | BPF_END | BPF_TO_BE
- * in bpfel and bpfeb case, which means below, that we map
- * to cpu_to_be16(). We could use it unconditionally in BPF
- * case, but better not rely on it, so that this header here
- * can be used from application and BPF program side, which
- * use different targets.
- */
-#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
-# define __bpf_ntohs(x)__builtin_bswap16(x)
-# define __bpf_htons(x)__builtin_bswap16(x)
-# define __bpf_constant_ntohs(x)___constant_swab16(x)
-# define __bpf_constant_htons(x)___constant_swab16(x)
-# define __bpf_ntohl(x)__builtin_bswap32(x)
-# define __bpf_htonl(x)__builtin_bswap32(x)
-# define __bpf_constant_ntohl(x)___constant_swab32(x)
-# define __bpf_constant_htonl(x)___constant_swab32(x)
-#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
-# define __bpf_ntohs(x)(x)
-# define __bpf_htons(x)(x)
-# define __bpf_constant_ntohs(x)(x)
-# define __bpf_constant_htons(x)(x)
-# define __bpf_ntohl(x)(x)
-# define __bpf_htonl(x)(x)
-# define __bpf_constant_ntohl(x)(x)
-# define __bpf_constant_htonl(x)(x)
-#else
-# error "Fix your compiler's __BYTE_ORDER__?!"
-#endif
-
-#define bpf_htons(x)\
- (__builtin_constant_p(x) ?\
- __bpf_constant_htons(x) : __bpf_htons(x))
-#define bpf_ntohs(x)\
- (__builtin_constant_p(x) ?\
- __bpf_constant_ntohs(x) : __bpf_ntohs(x))
-#define bpf_htonl(x)\
- (__builtin_constant_p(x) ?\
- __bpf_constant_htonl(x) : __bpf_htonl(x))
-#define bpf_ntohl(x)\
- (__builtin_constant_p(x) ?\
- __bpf_constant_ntohl(x) : __bpf_ntohl(x))
-
-#endif /* __BPF_ENDIAN__ */
diff --git a/src/xdp/include/bpf_legacy.h b/src/xdp/include/bpf_legacy.h
deleted file mode 100644
index 8dfa168cd..000000000
--- a/src/xdp/include/bpf_legacy.h
+++ /dev/null
@@ -1,38 +0,0 @@
-/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
-#ifndef __BPF_LEGACY__
-#define __BPF_LEGACY__
-
-/*
- * legacy bpf_map_def with extra fields supported only by bpf_load(), do not
- * use outside of samples/bpf
- */
-struct bpf_map_def_legacy {
- unsigned int type;
- unsigned int key_size;
- unsigned int value_size;
- unsigned int max_entries;
- unsigned int map_flags;
- unsigned int inner_map_idx;
- unsigned int numa_node;
-};
-
-#define BPF_ANNOTATE_KV_PAIR(name, type_key, type_val) \
- struct ____btf_map_##name { \
- type_key key; \
- type_val value; \
- }; \
- struct ____btf_map_##name \
- __attribute__ ((section(".maps." #name), used)) \
- ____btf_map_##name = { }
-
-/* llvm builtin functions that eBPF C program may use to
- * emit BPF_LD_ABS and BPF_LD_IND instructions
- */
-unsigned long long load_byte(void *skb,
- unsigned long long off) asm("llvm.bpf.load.byte");
-unsigned long long load_half(void *skb,
- unsigned long long off) asm("llvm.bpf.load.half");
-unsigned long long load_word(void *skb,
- unsigned long long off) asm("llvm.bpf.load.word");
-
-#endif
diff --git a/src/xdp/include/bpf_util.h b/src/xdp/include/bpf_util.h
deleted file mode 100644
index e74b33e9d..000000000
--- a/src/xdp/include/bpf_util.h
+++ /dev/null
@@ -1,61 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/* Copied from $(LINUX)/tools/testing/selftests/bpf/bpf_util.h */
-#ifndef __BPF_UTIL__
-#define __BPF_UTIL__
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <errno.h>
-
-static inline unsigned int bpf_num_possible_cpus(void)
-{
- static const char *fcpu = "/sys/devices/system/cpu/possible";
- unsigned int start, end, possible_cpus = 0;
- char buff[128];
- FILE *fp;
- int n;
-
- fp = fopen(fcpu, "r");
- if (!fp) {
- printf("Failed to open %s: '%s'!\n", fcpu, strerror(errno));
- exit(1);
- }
-
- while (fgets(buff, sizeof(buff), fp)) {
- n = sscanf(buff, "%u-%u", &start, &end);
- if (n == 0) {
- printf("Failed to retrieve # possible CPUs!\n");
- exit(1);
- } else if (n == 1) {
- end = start;
- }
- possible_cpus = start == 0 ? end + 1 : 0;
- break;
- }
- fclose(fp);
-
- return possible_cpus;
-}
-
-#define __bpf_percpu_val_align __attribute__((__aligned__(8)))
-
-#define BPF_DECLARE_PERCPU(type, name) \
- struct { type v; /* padding */ } __bpf_percpu_val_align \
- name[bpf_num_possible_cpus()]
-#define bpf_percpu(name, cpu) name[(cpu)].v
-
-#ifndef ARRAY_SIZE
-# define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
-#endif
-
-#ifndef sizeof_field
-#define sizeof_field(TYPE, MEMBER) sizeof((((TYPE *)0)->MEMBER))
-#endif
-
-#ifndef offsetofend
-#define offsetofend(TYPE, MEMBER) \
- (offsetof(TYPE, MEMBER) + sizeof_field(TYPE, MEMBER))
-#endif
-
-#endif /* __BPF_UTIL__ */
diff --git a/src/xdp/include/jhash.h b/src/xdp/include/jhash.h
deleted file mode 100644
index b81a0d0eb..000000000
--- a/src/xdp/include/jhash.h
+++ /dev/null
@@ -1,172 +0,0 @@
-#ifndef _LINUX_JHASH_H
-#define _LINUX_JHASH_H
-
-/* Copied from $(LINUX)/include/linux/jhash.h (kernel 4.18) */
-
-/* jhash.h: Jenkins hash support.
- *
- * Copyright (C) 2006. Bob Jenkins (bob_jenkins@burtleburtle.net)
- *
- * http://burtleburtle.net/bob/hash/
- *
- * These are the credits from Bob's sources:
- *
- * lookup3.c, by Bob Jenkins, May 2006, Public Domain.
- *
- * These are functions for producing 32-bit hashes for hash table lookup.
- * hashword(), hashlittle(), hashlittle2(), hashbig(), mix(), and final()
- * are externally useful functions. Routines to test the hash are included
- * if SELF_TEST is defined. You can use this free for any purpose. It's in
- * the public domain. It has no warranty.
- *
- * Copyright (C) 2009-2010 Jozsef Kadlecsik (kadlec@blackhole.kfki.hu)
- */
-
-static inline __u32 rol32(__u32 word, unsigned int shift)
-{
- return (word << shift) | (word >> ((-shift) & 31));
-}
-
-/* copy paste of jhash from kernel sources (include/linux/jhash.h) to make sure
- * LLVM can compile it into valid sequence of BPF instructions
- */
-#define __jhash_mix(a, b, c) \
-{ \
- a -= c; a ^= rol32(c, 4); c += b; \
- b -= a; b ^= rol32(a, 6); a += c; \
- c -= b; c ^= rol32(b, 8); b += a; \
- a -= c; a ^= rol32(c, 16); c += b; \
- b -= a; b ^= rol32(a, 19); a += c; \
- c -= b; c ^= rol32(b, 4); b += a; \
-}
-
-#define __jhash_final(a, b, c) \
-{ \
- c ^= b; c -= rol32(b, 14); \
- a ^= c; a -= rol32(c, 11); \
- b ^= a; b -= rol32(a, 25); \
- c ^= b; c -= rol32(b, 16); \
- a ^= c; a -= rol32(c, 4); \
- b ^= a; b -= rol32(a, 14); \
- c ^= b; c -= rol32(b, 24); \
-}
-
-#define JHASH_INITVAL 0xdeadbeef
-
-typedef unsigned int u32;
-
-/* jhash - hash an arbitrary key
- * @k: sequence of bytes as key
- * @length: the length of the key
- * @initval: the previous hash, or an arbitray value
- *
- * The generic version, hashes an arbitrary sequence of bytes.
- * No alignment or length assumptions are made about the input key.
- *
- * Returns the hash value of the key. The result depends on endianness.
- */
-static inline u32 jhash(const void *key, u32 length, u32 initval)
-{
- u32 a, b, c;
- const unsigned char *k = key;
-
- /* Set up the internal state */
- a = b = c = JHASH_INITVAL + length + initval;
-
- /* All but the last block: affect some 32 bits of (a,b,c) */
- while (length > 12) {
- a += *(u32 *)(k);
- b += *(u32 *)(k + 4);
- c += *(u32 *)(k + 8);
- __jhash_mix(a, b, c);
- length -= 12;
- k += 12;
- }
- /* Last block: affect all 32 bits of (c) */
- switch (length) {
- case 12: c += (u32)k[11]<<24; /* fall through */
- case 11: c += (u32)k[10]<<16; /* fall through */
- case 10: c += (u32)k[9]<<8; /* fall through */
- case 9: c += k[8]; /* fall through */
- case 8: b += (u32)k[7]<<24; /* fall through */
- case 7: b += (u32)k[6]<<16; /* fall through */
- case 6: b += (u32)k[5]<<8; /* fall through */
- case 5: b += k[4]; /* fall through */
- case 4: a += (u32)k[3]<<24; /* fall through */
- case 3: a += (u32)k[2]<<16; /* fall through */
- case 2: a += (u32)k[1]<<8; /* fall through */
- case 1: a += k[0];
- __jhash_final(a, b, c);
- case 0: /* Nothing left to add */
- break;
- }
-
- return c;
-}
-
-/* jhash2 - hash an array of u32's
- * @k: the key which must be an array of u32's
- * @length: the number of u32's in the key
- * @initval: the previous hash, or an arbitray value
- *
- * Returns the hash value of the key.
- */
-static inline u32 jhash2(const u32 *k, u32 length, u32 initval)
-{
- u32 a, b, c;
-
- /* Set up the internal state */
- a = b = c = JHASH_INITVAL + (length<<2) + initval;
-
- /* Handle most of the key */
- while (length > 3) {
- a += k[0];
- b += k[1];
- c += k[2];
- __jhash_mix(a, b, c);
- length -= 3;
- k += 3;
- }
-
- /* Handle the last 3 u32's */
- switch (length) {
- case 3: c += k[2]; /* fall through */
- case 2: b += k[1]; /* fall through */
- case 1: a += k[0];
- __jhash_final(a, b, c);
- case 0: /* Nothing left to add */
- break;
- }
-
- return c;
-}
-
-
-/* __jhash_nwords - hash exactly 3, 2 or 1 word(s) */
-static inline u32 __jhash_nwords(u32 a, u32 b, u32 c, u32 initval)
-{
- a += initval;
- b += initval;
- c += initval;
-
- __jhash_final(a, b, c);
-
- return c;
-}
-
-static inline u32 jhash_3words(u32 a, u32 b, u32 c, u32 initval)
-{
- return __jhash_nwords(a, b, c, initval + JHASH_INITVAL + (3 << 2));
-}
-
-static inline u32 jhash_2words(u32 a, u32 b, u32 initval)
-{
- return __jhash_nwords(a, b, 0, initval + JHASH_INITVAL + (2 << 2));
-}
-
-static inline u32 jhash_1word(u32 a, u32 initval)
-{
- return __jhash_nwords(a, 0, 0, initval + JHASH_INITVAL + (1 << 2));
-}
-
-#endif /* _LINUX_JHASH_H */
diff --git a/src/xdp/include/linux/bpf.h b/src/xdp/include/linux/bpf.h
deleted file mode 100644
index 161a93809..000000000
--- a/src/xdp/include/linux/bpf.h
+++ /dev/null
@@ -1,3278 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-/* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
- */
-#ifndef _UAPI__LINUX_BPF_H__
-#define _UAPI__LINUX_BPF_H__
-
-#include <linux/types.h>
-#include <linux/bpf_common.h>
-
-/* Extended instruction set based on top of classic BPF */
-
-/* instruction classes */
-#define BPF_JMP32 0x06 /* jmp mode in word width */
-#define BPF_ALU64 0x07 /* alu mode in double word width */
-
-/* ld/ldx fields */
-#define BPF_DW 0x18 /* double word (64-bit) */
-#define BPF_XADD 0xc0 /* exclusive add */
-
-/* alu/jmp fields */
-#define BPF_MOV 0xb0 /* mov reg to reg */
-#define BPF_ARSH 0xc0 /* sign extending arithmetic shift right */
-
-/* change endianness of a register */
-#define BPF_END 0xd0 /* flags for endianness conversion: */
-#define BPF_TO_LE 0x00 /* convert to little-endian */
-#define BPF_TO_BE 0x08 /* convert to big-endian */
-#define BPF_FROM_LE BPF_TO_LE
-#define BPF_FROM_BE BPF_TO_BE
-
-/* jmp encodings */
-#define BPF_JNE 0x50 /* jump != */
-#define BPF_JLT 0xa0 /* LT is unsigned, '<' */
-#define BPF_JLE 0xb0 /* LE is unsigned, '<=' */
-#define BPF_JSGT 0x60 /* SGT is signed '>', GT in x86 */
-#define BPF_JSGE 0x70 /* SGE is signed '>=', GE in x86 */
-#define BPF_JSLT 0xc0 /* SLT is signed, '<' */
-#define BPF_JSLE 0xd0 /* SLE is signed, '<=' */
-#define BPF_CALL 0x80 /* function call */
-#define BPF_EXIT 0x90 /* function return */
-
-/* Register numbers */
-enum {
- BPF_REG_0 = 0,
- BPF_REG_1,
- BPF_REG_2,
- BPF_REG_3,
- BPF_REG_4,
- BPF_REG_5,
- BPF_REG_6,
- BPF_REG_7,
- BPF_REG_8,
- BPF_REG_9,
- BPF_REG_10,
- __MAX_BPF_REG,
-};
-
-/* BPF has 10 general purpose 64-bit registers and stack frame. */
-#define MAX_BPF_REG __MAX_BPF_REG
-
-struct bpf_insn {
- __u8 code; /* opcode */
- __u8 dst_reg:4; /* dest register */
- __u8 src_reg:4; /* source register */
- __s16 off; /* signed offset */
- __s32 imm; /* signed immediate constant */
-};
-
-/* Key of an a BPF_MAP_TYPE_LPM_TRIE entry */
-struct bpf_lpm_trie_key {
- __u32 prefixlen; /* up to 32 for AF_INET, 128 for AF_INET6 */
- __u8 data[0]; /* Arbitrary size */
-};
-
-struct bpf_cgroup_storage_key {
- __u64 cgroup_inode_id; /* cgroup inode id */
- __u32 attach_type; /* program attach type */
-};
-
-/* BPF syscall commands, see bpf(2) man-page for details. */
-enum bpf_cmd {
- BPF_MAP_CREATE,
- BPF_MAP_LOOKUP_ELEM,
- BPF_MAP_UPDATE_ELEM,
- BPF_MAP_DELETE_ELEM,
- BPF_MAP_GET_NEXT_KEY,
- BPF_PROG_LOAD,
- BPF_OBJ_PIN,
- BPF_OBJ_GET,
- BPF_PROG_ATTACH,
- BPF_PROG_DETACH,
- BPF_PROG_TEST_RUN,
- BPF_PROG_GET_NEXT_ID,
- BPF_MAP_GET_NEXT_ID,
- BPF_PROG_GET_FD_BY_ID,
- BPF_MAP_GET_FD_BY_ID,
- BPF_OBJ_GET_INFO_BY_FD,
- BPF_PROG_QUERY,
- BPF_RAW_TRACEPOINT_OPEN,
- BPF_BTF_LOAD,
- BPF_BTF_GET_FD_BY_ID,
- BPF_TASK_FD_QUERY,
- BPF_MAP_LOOKUP_AND_DELETE_ELEM,
-};
-
-enum bpf_map_type {
- BPF_MAP_TYPE_UNSPEC,
- BPF_MAP_TYPE_HASH,
- BPF_MAP_TYPE_ARRAY,
- BPF_MAP_TYPE_PROG_ARRAY,
- BPF_MAP_TYPE_PERF_EVENT_ARRAY,
- BPF_MAP_TYPE_PERCPU_HASH,
- BPF_MAP_TYPE_PERCPU_ARRAY,
- BPF_MAP_TYPE_STACK_TRACE,
- BPF_MAP_TYPE_CGROUP_ARRAY,
- BPF_MAP_TYPE_LRU_HASH,
- BPF_MAP_TYPE_LRU_PERCPU_HASH,
- BPF_MAP_TYPE_LPM_TRIE,
- BPF_MAP_TYPE_ARRAY_OF_MAPS,
- BPF_MAP_TYPE_HASH_OF_MAPS,
- BPF_MAP_TYPE_DEVMAP,
- BPF_MAP_TYPE_SOCKMAP,
- BPF_MAP_TYPE_CPUMAP,
- BPF_MAP_TYPE_XSKMAP,
- BPF_MAP_TYPE_SOCKHASH,
- BPF_MAP_TYPE_CGROUP_STORAGE,
- BPF_MAP_TYPE_REUSEPORT_SOCKARRAY,
- BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE,
- BPF_MAP_TYPE_QUEUE,
- BPF_MAP_TYPE_STACK,
-};
-
-/* Note that tracing related programs such as
- * BPF_PROG_TYPE_{KPROBE,TRACEPOINT,PERF_EVENT,RAW_TRACEPOINT}
- * are not subject to a stable API since kernel internal data
- * structures can change from release to release and may
- * therefore break existing tracing BPF programs. Tracing BPF
- * programs correspond to /a/ specific kernel which is to be
- * analyzed, and not /a/ specific kernel /and/ all future ones.
- */
-enum bpf_prog_type {
- BPF_PROG_TYPE_UNSPEC,
- BPF_PROG_TYPE_SOCKET_FILTER,
- BPF_PROG_TYPE_KPROBE,
- BPF_PROG_TYPE_SCHED_CLS,
- BPF_PROG_TYPE_SCHED_ACT,
- BPF_PROG_TYPE_TRACEPOINT,
- BPF_PROG_TYPE_XDP,
- BPF_PROG_TYPE_PERF_EVENT,
- BPF_PROG_TYPE_CGROUP_SKB,
- BPF_PROG_TYPE_CGROUP_SOCK,
- BPF_PROG_TYPE_LWT_IN,
- BPF_PROG_TYPE_LWT_OUT,
- BPF_PROG_TYPE_LWT_XMIT,
- BPF_PROG_TYPE_SOCK_OPS,
- BPF_PROG_TYPE_SK_SKB,
- BPF_PROG_TYPE_CGROUP_DEVICE,
- BPF_PROG_TYPE_SK_MSG,
- BPF_PROG_TYPE_RAW_TRACEPOINT,
- BPF_PROG_TYPE_CGROUP_SOCK_ADDR,
- BPF_PROG_TYPE_LWT_SEG6LOCAL,
- BPF_PROG_TYPE_LIRC_MODE2,
- BPF_PROG_TYPE_SK_REUSEPORT,
- BPF_PROG_TYPE_FLOW_DISSECTOR,
-};
-
-enum bpf_attach_type {
- BPF_CGROUP_INET_INGRESS,
- BPF_CGROUP_INET_EGRESS,
- BPF_CGROUP_INET_SOCK_CREATE,
- BPF_CGROUP_SOCK_OPS,
- BPF_SK_SKB_STREAM_PARSER,
- BPF_SK_SKB_STREAM_VERDICT,
- BPF_CGROUP_DEVICE,
- BPF_SK_MSG_VERDICT,
- BPF_CGROUP_INET4_BIND,
- BPF_CGROUP_INET6_BIND,
- BPF_CGROUP_INET4_CONNECT,
- BPF_CGROUP_INET6_CONNECT,
- BPF_CGROUP_INET4_POST_BIND,
- BPF_CGROUP_INET6_POST_BIND,
- BPF_CGROUP_UDP4_SENDMSG,
- BPF_CGROUP_UDP6_SENDMSG,
- BPF_LIRC_MODE2,
- BPF_FLOW_DISSECTOR,
- __MAX_BPF_ATTACH_TYPE
-};
-
-#define MAX_BPF_ATTACH_TYPE __MAX_BPF_ATTACH_TYPE
-
-/* cgroup-bpf attach flags used in BPF_PROG_ATTACH command
- *
- * NONE(default): No further bpf programs allowed in the subtree.
- *
- * BPF_F_ALLOW_OVERRIDE: If a sub-cgroup installs some bpf program,
- * the program in this cgroup yields to sub-cgroup program.
- *
- * BPF_F_ALLOW_MULTI: If a sub-cgroup installs some bpf program,
- * that cgroup program gets run in addition to the program in this cgroup.
- *
- * Only one program is allowed to be attached to a cgroup with
- * NONE or BPF_F_ALLOW_OVERRIDE flag.
- * Attaching another program on top of NONE or BPF_F_ALLOW_OVERRIDE will
- * release old program and attach the new one. Attach flags has to match.
- *
- * Multiple programs are allowed to be attached to a cgroup with
- * BPF_F_ALLOW_MULTI flag. They are executed in FIFO order
- * (those that were attached first, run first)
- * The programs of sub-cgroup are executed first, then programs of
- * this cgroup and then programs of parent cgroup.
- * When children program makes decision (like picking TCP CA or sock bind)
- * parent program has a chance to override it.
- *
- * A cgroup with MULTI or OVERRIDE flag allows any attach flags in sub-cgroups.
- * A cgroup with NONE doesn't allow any programs in sub-cgroups.
- * Ex1:
- * cgrp1 (MULTI progs A, B) ->
- * cgrp2 (OVERRIDE prog C) ->
- * cgrp3 (MULTI prog D) ->
- * cgrp4 (OVERRIDE prog E) ->
- * cgrp5 (NONE prog F)
- * the event in cgrp5 triggers execution of F,D,A,B in that order.
- * if prog F is detached, the execution is E,D,A,B
- * if prog F and D are detached, the execution is E,A,B
- * if prog F, E and D are detached, the execution is C,A,B
- *
- * All eligible programs are executed regardless of return code from
- * earlier programs.
- */
-#define BPF_F_ALLOW_OVERRIDE (1U << 0)
-#define BPF_F_ALLOW_MULTI (1U << 1)
-
-/* If BPF_F_STRICT_ALIGNMENT is used in BPF_PROG_LOAD command, the
- * verifier will perform strict alignment checking as if the kernel
- * has been built with CONFIG_EFFICIENT_UNALIGNED_ACCESS not set,
- * and NET_IP_ALIGN defined to 2.
- */
-#define BPF_F_STRICT_ALIGNMENT (1U << 0)
-
-/* If BPF_F_ANY_ALIGNMENT is used in BPF_PROF_LOAD command, the
- * verifier will allow any alignment whatsoever. On platforms
- * with strict alignment requirements for loads ands stores (such
- * as sparc and mips) the verifier validates that all loads and
- * stores provably follow this requirement. This flag turns that
- * checking and enforcement off.
- *
- * It is mostly used for testing when we want to validate the
- * context and memory access aspects of the verifier, but because
- * of an unaligned access the alignment check would trigger before
- * the one we are interested in.
- */
-#define BPF_F_ANY_ALIGNMENT (1U << 1)
-
-/* when bpf_ldimm64->src_reg == BPF_PSEUDO_MAP_FD, bpf_ldimm64->imm == fd */
-#define BPF_PSEUDO_MAP_FD 1
-
-/* when bpf_call->src_reg == BPF_PSEUDO_CALL, bpf_call->imm == pc-relative
- * offset to another bpf function
- */
-#define BPF_PSEUDO_CALL 1
-
-/* flags for BPF_MAP_UPDATE_ELEM command */
-#define BPF_ANY 0 /* create new element or update existing */
-#define BPF_NOEXIST 1 /* create new element if it didn't exist */
-#define BPF_EXIST 2 /* update existing element */
-#define BPF_F_LOCK 4 /* spin_lock-ed map_lookup/map_update */
-
-/* flags for BPF_MAP_CREATE command */
-#define BPF_F_NO_PREALLOC (1U << 0)
-/* Instead of having one common LRU list in the
- * BPF_MAP_TYPE_LRU_[PERCPU_]HASH map, use a percpu LRU list
- * which can scale and perform better.
- * Note, the LRU nodes (including free nodes) cannot be moved
- * across different LRU lists.
- */
-#define BPF_F_NO_COMMON_LRU (1U << 1)
-/* Specify numa node during map creation */
-#define BPF_F_NUMA_NODE (1U << 2)
-
-#define BPF_OBJ_NAME_LEN 16U
-
-/* Flags for accessing BPF object */
-#define BPF_F_RDONLY (1U << 3)
-#define BPF_F_WRONLY (1U << 4)
-
-/* Flag for stack_map, store build_id+offset instead of pointer */
-#define BPF_F_STACK_BUILD_ID (1U << 5)
-
-/* Zero-initialize hash function seed. This should only be used for testing. */
-#define BPF_F_ZERO_SEED (1U << 6)
-
-/* flags for BPF_PROG_QUERY */
-#define BPF_F_QUERY_EFFECTIVE (1U << 0)
-
-enum bpf_stack_build_id_status {
- /* user space need an empty entry to identify end of a trace */
- BPF_STACK_BUILD_ID_EMPTY = 0,
- /* with valid build_id and offset */
- BPF_STACK_BUILD_ID_VALID = 1,
- /* couldn't get build_id, fallback to ip */
- BPF_STACK_BUILD_ID_IP = 2,
-};
-
-#define BPF_BUILD_ID_SIZE 20
-struct bpf_stack_build_id {
- __s32 status;
- unsigned char build_id[BPF_BUILD_ID_SIZE];
- union {
- __u64 offset;
- __u64 ip;
- };
-};
-
-union bpf_attr {
- struct { /* anonymous struct used by BPF_MAP_CREATE command */
- __u32 map_type; /* one of enum bpf_map_type */
- __u32 key_size; /* size of key in bytes */
- __u32 value_size; /* size of value in bytes */
- __u32 max_entries; /* max number of entries in a map */
- __u32 map_flags; /* BPF_MAP_CREATE related
- * flags defined above.
- */
- __u32 inner_map_fd; /* fd pointing to the inner map */
- __u32 numa_node; /* numa node (effective only if
- * BPF_F_NUMA_NODE is set).
- */
- char map_name[BPF_OBJ_NAME_LEN];
- __u32 map_ifindex; /* ifindex of netdev to create on */
- __u32 btf_fd; /* fd pointing to a BTF type data */
- __u32 btf_key_type_id; /* BTF type_id of the key */
- __u32 btf_value_type_id; /* BTF type_id of the value */
- };
-
- struct { /* anonymous struct used by BPF_MAP_*_ELEM commands */
- __u32 map_fd;
- __aligned_u64 key;
- union {
- __aligned_u64 value;
- __aligned_u64 next_key;
- };
- __u64 flags;
- };
-
- struct { /* anonymous struct used by BPF_PROG_LOAD command */
- __u32 prog_type; /* one of enum bpf_prog_type */
- __u32 insn_cnt;
- __aligned_u64 insns;
- __aligned_u64 license;
- __u32 log_level; /* verbosity level of verifier */
- __u32 log_size; /* size of user buffer */
- __aligned_u64 log_buf; /* user supplied buffer */
- __u32 kern_version; /* not used */
- __u32 prog_flags;
- char prog_name[BPF_OBJ_NAME_LEN];
- __u32 prog_ifindex; /* ifindex of netdev to prep for */
- /* For some prog types expected attach type must be known at
- * load time to verify attach type specific parts of prog
- * (context accesses, allowed helpers, etc).
- */
- __u32 expected_attach_type;
- __u32 prog_btf_fd; /* fd pointing to BTF type data */
- __u32 func_info_rec_size; /* userspace bpf_func_info size */
- __aligned_u64 func_info; /* func info */
- __u32 func_info_cnt; /* number of bpf_func_info records */
- __u32 line_info_rec_size; /* userspace bpf_line_info size */
- __aligned_u64 line_info; /* line info */
- __u32 line_info_cnt; /* number of bpf_line_info records */
- };
-
- struct { /* anonymous struct used by BPF_OBJ_* commands */
- __aligned_u64 pathname;
- __u32 bpf_fd;
- __u32 file_flags;
- };
-
- struct { /* anonymous struct used by BPF_PROG_ATTACH/DETACH commands */
- __u32 target_fd; /* container object to attach to */
- __u32 attach_bpf_fd; /* eBPF program to attach */
- __u32 attach_type;
- __u32 attach_flags;
- };
-
- struct { /* anonymous struct used by BPF_PROG_TEST_RUN command */
- __u32 prog_fd;
- __u32 retval;
- __u32 data_size_in; /* input: len of data_in */
- __u32 data_size_out; /* input/output: len of data_out
- * returns ENOSPC if data_out
- * is too small.
- */
- __aligned_u64 data_in;
- __aligned_u64 data_out;
- __u32 repeat;
- __u32 duration;
- } test;
-
- struct { /* anonymous struct used by BPF_*_GET_*_ID */
- union {
- __u32 start_id;
- __u32 prog_id;
- __u32 map_id;
- __u32 btf_id;
- };
- __u32 next_id;
- __u32 open_flags;
- };
-
- struct { /* anonymous struct used by BPF_OBJ_GET_INFO_BY_FD */
- __u32 bpf_fd;
- __u32 info_len;
- __aligned_u64 info;
- } info;
-
- struct { /* anonymous struct used by BPF_PROG_QUERY command */
- __u32 target_fd; /* container object to query */
- __u32 attach_type;
- __u32 query_flags;
- __u32 attach_flags;
- __aligned_u64 prog_ids;
- __u32 prog_cnt;
- } query;
-
- struct {
- __u64 name;
- __u32 prog_fd;
- } raw_tracepoint;
-
- struct { /* anonymous struct for BPF_BTF_LOAD */
- __aligned_u64 btf;
- __aligned_u64 btf_log_buf;
- __u32 btf_size;
- __u32 btf_log_size;
- __u32 btf_log_level;
- };
-
- struct {
- __u32 pid; /* input: pid */
- __u32 fd; /* input: fd */
- __u32 flags; /* input: flags */
- __u32 buf_len; /* input/output: buf len */
- __aligned_u64 buf; /* input/output:
- * tp_name for tracepoint
- * symbol for kprobe
- * filename for uprobe
- */
- __u32 prog_id; /* output: prod_id */
- __u32 fd_type; /* output: BPF_FD_TYPE_* */
- __u64 probe_offset; /* output: probe_offset */
- __u64 probe_addr; /* output: probe_addr */
- } task_fd_query;
-} __attribute__((aligned(8)));
-
-/* The description below is an attempt at providing documentation to eBPF
- * developers about the multiple available eBPF helper functions. It can be
- * parsed and used to produce a manual page. The workflow is the following,
- * and requires the rst2man utility:
- *
- * $ ./scripts/bpf_helpers_doc.py \
- * --filename include/uapi/linux/bpf.h > /tmp/bpf-helpers.rst
- * $ rst2man /tmp/bpf-helpers.rst > /tmp/bpf-helpers.7
- * $ man /tmp/bpf-helpers.7
- *
- * Note that in order to produce this external documentation, some RST
- * formatting is used in the descriptions to get "bold" and "italics" in
- * manual pages. Also note that the few trailing white spaces are
- * intentional, removing them would break paragraphs for rst2man.
- *
- * Start of BPF helper function descriptions:
- *
- * void *bpf_map_lookup_elem(struct bpf_map *map, const void *key)
- * Description
- * Perform a lookup in *map* for an entry associated to *key*.
- * Return
- * Map value associated to *key*, or **NULL** if no entry was
- * found.
- *
- * int bpf_map_update_elem(struct bpf_map *map, const void *key, const void *value, u64 flags)
- * Description
- * Add or update the value of the entry associated to *key* in
- * *map* with *value*. *flags* is one of:
- *
- * **BPF_NOEXIST**
- * The entry for *key* must not exist in the map.
- * **BPF_EXIST**
- * The entry for *key* must already exist in the map.
- * **BPF_ANY**
- * No condition on the existence of the entry for *key*.
- *
- * Flag value **BPF_NOEXIST** cannot be used for maps of types
- * **BPF_MAP_TYPE_ARRAY** or **BPF_MAP_TYPE_PERCPU_ARRAY** (all
- * elements always exist), the helper would return an error.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_map_delete_elem(struct bpf_map *map, const void *key)
- * Description
- * Delete entry with *key* from *map*.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_probe_read(void *dst, u32 size, const void *src)
- * Description
- * For tracing programs, safely attempt to read *size* bytes from
- * address *src* and store the data in *dst*.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * u64 bpf_ktime_get_ns(void)
- * Description
- * Return the time elapsed since system boot, in nanoseconds.
- * Return
- * Current *ktime*.
- *
- * int bpf_trace_printk(const char *fmt, u32 fmt_size, ...)
- * Description
- * This helper is a "printk()-like" facility for debugging. It
- * prints a message defined by format *fmt* (of size *fmt_size*)
- * to file *\/sys/kernel/debug/tracing/trace* from DebugFS, if
- * available. It can take up to three additional **u64**
- * arguments (as an eBPF helpers, the total number of arguments is
- * limited to five).
- *
- * Each time the helper is called, it appends a line to the trace.
- * The format of the trace is customizable, and the exact output
- * one will get depends on the options set in
- * *\/sys/kernel/debug/tracing/trace_options* (see also the
- * *README* file under the same directory). However, it usually
- * defaults to something like:
- *
- * ::
- *
- * telnet-470 [001] .N.. 419421.045894: 0x00000001: <formatted msg>
- *
- * In the above:
- *
- * * ``telnet`` is the name of the current task.
- * * ``470`` is the PID of the current task.
- * * ``001`` is the CPU number on which the task is
- * running.
- * * In ``.N..``, each character refers to a set of
- * options (whether irqs are enabled, scheduling
- * options, whether hard/softirqs are running, level of
- * preempt_disabled respectively). **N** means that
- * **TIF_NEED_RESCHED** and **PREEMPT_NEED_RESCHED**
- * are set.
- * * ``419421.045894`` is a timestamp.
- * * ``0x00000001`` is a fake value used by BPF for the
- * instruction pointer register.
- * * ``<formatted msg>`` is the message formatted with
- * *fmt*.
- *
- * The conversion specifiers supported by *fmt* are similar, but
- * more limited than for printk(). They are **%d**, **%i**,
- * **%u**, **%x**, **%ld**, **%li**, **%lu**, **%lx**, **%lld**,
- * **%lli**, **%llu**, **%llx**, **%p**, **%s**. No modifier (size
- * of field, padding with zeroes, etc.) is available, and the
- * helper will return **-EINVAL** (but print nothing) if it
- * encounters an unknown specifier.
- *
- * Also, note that **bpf_trace_printk**\ () is slow, and should
- * only be used for debugging purposes. For this reason, a notice
- * bloc (spanning several lines) is printed to kernel logs and
- * states that the helper should not be used "for production use"
- * the first time this helper is used (or more precisely, when
- * **trace_printk**\ () buffers are allocated). For passing values
- * to user space, perf events should be preferred.
- * Return
- * The number of bytes written to the buffer, or a negative error
- * in case of failure.
- *
- * u32 bpf_get_prandom_u32(void)
- * Description
- * Get a pseudo-random number.
- *
- * From a security point of view, this helper uses its own
- * pseudo-random internal state, and cannot be used to infer the
- * seed of other random functions in the kernel. However, it is
- * essential to note that the generator used by the helper is not
- * cryptographically secure.
- * Return
- * A random 32-bit unsigned value.
- *
- * u32 bpf_get_smp_processor_id(void)
- * Description
- * Get the SMP (symmetric multiprocessing) processor id. Note that
- * all programs run with preemption disabled, which means that the
- * SMP processor id is stable during all the execution of the
- * program.
- * Return
- * The SMP id of the processor running the program.
- *
- * int bpf_skb_store_bytes(struct sk_buff *skb, u32 offset, const void *from, u32 len, u64 flags)
- * Description
- * Store *len* bytes from address *from* into the packet
- * associated to *skb*, at *offset*. *flags* are a combination of
- * **BPF_F_RECOMPUTE_CSUM** (automatically recompute the
- * checksum for the packet after storing the bytes) and
- * **BPF_F_INVALIDATE_HASH** (set *skb*\ **->hash**, *skb*\
- * **->swhash** and *skb*\ **->l4hash** to 0).
- *
- * A call to this helper is susceptible to change the underlaying
- * packet buffer. Therefore, at load time, all checks on pointers
- * previously done by the verifier are invalidated and must be
- * performed again, if the helper is used in combination with
- * direct packet access.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_l3_csum_replace(struct sk_buff *skb, u32 offset, u64 from, u64 to, u64 size)
- * Description
- * Recompute the layer 3 (e.g. IP) checksum for the packet
- * associated to *skb*. Computation is incremental, so the helper
- * must know the former value of the header field that was
- * modified (*from*), the new value of this field (*to*), and the
- * number of bytes (2 or 4) for this field, stored in *size*.
- * Alternatively, it is possible to store the difference between
- * the previous and the new values of the header field in *to*, by
- * setting *from* and *size* to 0. For both methods, *offset*
- * indicates the location of the IP checksum within the packet.
- *
- * This helper works in combination with **bpf_csum_diff**\ (),
- * which does not update the checksum in-place, but offers more
- * flexibility and can handle sizes larger than 2 or 4 for the
- * checksum to update.
- *
- * A call to this helper is susceptible to change the underlaying
- * packet buffer. Therefore, at load time, all checks on pointers
- * previously done by the verifier are invalidated and must be
- * performed again, if the helper is used in combination with
- * direct packet access.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_l4_csum_replace(struct sk_buff *skb, u32 offset, u64 from, u64 to, u64 flags)
- * Description
- * Recompute the layer 4 (e.g. TCP, UDP or ICMP) checksum for the
- * packet associated to *skb*. Computation is incremental, so the
- * helper must know the former value of the header field that was
- * modified (*from*), the new value of this field (*to*), and the
- * number of bytes (2 or 4) for this field, stored on the lowest
- * four bits of *flags*. Alternatively, it is possible to store
- * the difference between the previous and the new values of the
- * header field in *to*, by setting *from* and the four lowest
- * bits of *flags* to 0. For both methods, *offset* indicates the
- * location of the IP checksum within the packet. In addition to
- * the size of the field, *flags* can be added (bitwise OR) actual
- * flags. With **BPF_F_MARK_MANGLED_0**, a null checksum is left
- * untouched (unless **BPF_F_MARK_ENFORCE** is added as well), and
- * for updates resulting in a null checksum the value is set to
- * **CSUM_MANGLED_0** instead. Flag **BPF_F_PSEUDO_HDR** indicates
- * the checksum is to be computed against a pseudo-header.
- *
- * This helper works in combination with **bpf_csum_diff**\ (),
- * which does not update the checksum in-place, but offers more
- * flexibility and can handle sizes larger than 2 or 4 for the
- * checksum to update.
- *
- * A call to this helper is susceptible to change the underlaying
- * packet buffer. Therefore, at load time, all checks on pointers
- * previously done by the verifier are invalidated and must be
- * performed again, if the helper is used in combination with
- * direct packet access.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_tail_call(void *ctx, struct bpf_map *prog_array_map, u32 index)
- * Description
- * This special helper is used to trigger a "tail call", or in
- * other words, to jump into another eBPF program. The same stack
- * frame is used (but values on stack and in registers for the
- * caller are not accessible to the callee). This mechanism allows
- * for program chaining, either for raising the maximum number of
- * available eBPF instructions, or to execute given programs in
- * conditional blocks. For security reasons, there is an upper
- * limit to the number of successive tail calls that can be
- * performed.
- *
- * Upon call of this helper, the program attempts to jump into a
- * program referenced at index *index* in *prog_array_map*, a
- * special map of type **BPF_MAP_TYPE_PROG_ARRAY**, and passes
- * *ctx*, a pointer to the context.
- *
- * If the call succeeds, the kernel immediately runs the first
- * instruction of the new program. This is not a function call,
- * and it never returns to the previous program. If the call
- * fails, then the helper has no effect, and the caller continues
- * to run its subsequent instructions. A call can fail if the
- * destination program for the jump does not exist (i.e. *index*
- * is superior to the number of entries in *prog_array_map*), or
- * if the maximum number of tail calls has been reached for this
- * chain of programs. This limit is defined in the kernel by the
- * macro **MAX_TAIL_CALL_CNT** (not accessible to user space),
- * which is currently set to 32.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_clone_redirect(struct sk_buff *skb, u32 ifindex, u64 flags)
- * Description
- * Clone and redirect the packet associated to *skb* to another
- * net device of index *ifindex*. Both ingress and egress
- * interfaces can be used for redirection. The **BPF_F_INGRESS**
- * value in *flags* is used to make the distinction (ingress path
- * is selected if the flag is present, egress path otherwise).
- * This is the only flag supported for now.
- *
- * In comparison with **bpf_redirect**\ () helper,
- * **bpf_clone_redirect**\ () has the associated cost of
- * duplicating the packet buffer, but this can be executed out of
- * the eBPF program. Conversely, **bpf_redirect**\ () is more
- * efficient, but it is handled through an action code where the
- * redirection happens only after the eBPF program has returned.
- *
- * A call to this helper is susceptible to change the underlaying
- * packet buffer. Therefore, at load time, all checks on pointers
- * previously done by the verifier are invalidated and must be
- * performed again, if the helper is used in combination with
- * direct packet access.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * u64 bpf_get_current_pid_tgid(void)
- * Return
- * A 64-bit integer containing the current tgid and pid, and
- * created as such:
- * *current_task*\ **->tgid << 32 \|**
- * *current_task*\ **->pid**.
- *
- * u64 bpf_get_current_uid_gid(void)
- * Return
- * A 64-bit integer containing the current GID and UID, and
- * created as such: *current_gid* **<< 32 \|** *current_uid*.
- *
- * int bpf_get_current_comm(char *buf, u32 size_of_buf)
- * Description
- * Copy the **comm** attribute of the current task into *buf* of
- * *size_of_buf*. The **comm** attribute contains the name of
- * the executable (excluding the path) for the current task. The
- * *size_of_buf* must be strictly positive. On success, the
- * helper makes sure that the *buf* is NUL-terminated. On failure,
- * it is filled with zeroes.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * u32 bpf_get_cgroup_classid(struct sk_buff *skb)
- * Description
- * Retrieve the classid for the current task, i.e. for the net_cls
- * cgroup to which *skb* belongs.
- *
- * This helper can be used on TC egress path, but not on ingress.
- *
- * The net_cls cgroup provides an interface to tag network packets
- * based on a user-provided identifier for all traffic coming from
- * the tasks belonging to the related cgroup. See also the related
- * kernel documentation, available from the Linux sources in file
- * *Documentation/cgroup-v1/net_cls.txt*.
- *
- * The Linux kernel has two versions for cgroups: there are
- * cgroups v1 and cgroups v2. Both are available to users, who can
- * use a mixture of them, but note that the net_cls cgroup is for
- * cgroup v1 only. This makes it incompatible with BPF programs
- * run on cgroups, which is a cgroup-v2-only feature (a socket can
- * only hold data for one version of cgroups at a time).
- *
- * This helper is only available is the kernel was compiled with
- * the **CONFIG_CGROUP_NET_CLASSID** configuration option set to
- * "**y**" or to "**m**".
- * Return
- * The classid, or 0 for the default unconfigured classid.
- *
- * int bpf_skb_vlan_push(struct sk_buff *skb, __be16 vlan_proto, u16 vlan_tci)
- * Description
- * Push a *vlan_tci* (VLAN tag control information) of protocol
- * *vlan_proto* to the packet associated to *skb*, then update
- * the checksum. Note that if *vlan_proto* is different from
- * **ETH_P_8021Q** and **ETH_P_8021AD**, it is considered to
- * be **ETH_P_8021Q**.
- *
- * A call to this helper is susceptible to change the underlaying
- * packet buffer. Therefore, at load time, all checks on pointers
- * previously done by the verifier are invalidated and must be
- * performed again, if the helper is used in combination with
- * direct packet access.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_skb_vlan_pop(struct sk_buff *skb)
- * Description
- * Pop a VLAN header from the packet associated to *skb*.
- *
- * A call to this helper is susceptible to change the underlaying
- * packet buffer. Therefore, at load time, all checks on pointers
- * previously done by the verifier are invalidated and must be
- * performed again, if the helper is used in combination with
- * direct packet access.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_skb_get_tunnel_key(struct sk_buff *skb, struct bpf_tunnel_key *key, u32 size, u64 flags)
- * Description
- * Get tunnel metadata. This helper takes a pointer *key* to an
- * empty **struct bpf_tunnel_key** of **size**, that will be
- * filled with tunnel metadata for the packet associated to *skb*.
- * The *flags* can be set to **BPF_F_TUNINFO_IPV6**, which
- * indicates that the tunnel is based on IPv6 protocol instead of
- * IPv4.
- *
- * The **struct bpf_tunnel_key** is an object that generalizes the
- * principal parameters used by various tunneling protocols into a
- * single struct. This way, it can be used to easily make a
- * decision based on the contents of the encapsulation header,
- * "summarized" in this struct. In particular, it holds the IP
- * address of the remote end (IPv4 or IPv6, depending on the case)
- * in *key*\ **->remote_ipv4** or *key*\ **->remote_ipv6**. Also,
- * this struct exposes the *key*\ **->tunnel_id**, which is
- * generally mapped to a VNI (Virtual Network Identifier), making
- * it programmable together with the **bpf_skb_set_tunnel_key**\
- * () helper.
- *
- * Let's imagine that the following code is part of a program
- * attached to the TC ingress interface, on one end of a GRE
- * tunnel, and is supposed to filter out all messages coming from
- * remote ends with IPv4 address other than 10.0.0.1:
- *
- * ::
- *
- * int ret;
- * struct bpf_tunnel_key key = {};
- *
- * ret = bpf_skb_get_tunnel_key(skb, &key, sizeof(key), 0);
- * if (ret < 0)
- * return TC_ACT_SHOT; // drop packet
- *
- * if (key.remote_ipv4 != 0x0a000001)
- * return TC_ACT_SHOT; // drop packet
- *
- * return TC_ACT_OK; // accept packet
- *
- * This interface can also be used with all encapsulation devices
- * that can operate in "collect metadata" mode: instead of having
- * one network device per specific configuration, the "collect
- * metadata" mode only requires a single device where the
- * configuration can be extracted from this helper.
- *
- * This can be used together with various tunnels such as VXLan,
- * Geneve, GRE or IP in IP (IPIP).
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_skb_set_tunnel_key(struct sk_buff *skb, struct bpf_tunnel_key *key, u32 size, u64 flags)
- * Description
- * Populate tunnel metadata for packet associated to *skb.* The
- * tunnel metadata is set to the contents of *key*, of *size*. The
- * *flags* can be set to a combination of the following values:
- *
- * **BPF_F_TUNINFO_IPV6**
- * Indicate that the tunnel is based on IPv6 protocol
- * instead of IPv4.
- * **BPF_F_ZERO_CSUM_TX**
- * For IPv4 packets, add a flag to tunnel metadata
- * indicating that checksum computation should be skipped
- * and checksum set to zeroes.
- * **BPF_F_DONT_FRAGMENT**
- * Add a flag to tunnel metadata indicating that the
- * packet should not be fragmented.
- * **BPF_F_SEQ_NUMBER**
- * Add a flag to tunnel metadata indicating that a
- * sequence number should be added to tunnel header before
- * sending the packet. This flag was added for GRE
- * encapsulation, but might be used with other protocols
- * as well in the future.
- *
- * Here is a typical usage on the transmit path:
- *
- * ::
- *
- * struct bpf_tunnel_key key;
- * populate key ...
- * bpf_skb_set_tunnel_key(skb, &key, sizeof(key), 0);
- * bpf_clone_redirect(skb, vxlan_dev_ifindex, 0);
- *
- * See also the description of the **bpf_skb_get_tunnel_key**\ ()
- * helper for additional information.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * u64 bpf_perf_event_read(struct bpf_map *map, u64 flags)
- * Description
- * Read the value of a perf event counter. This helper relies on a
- * *map* of type **BPF_MAP_TYPE_PERF_EVENT_ARRAY**. The nature of
- * the perf event counter is selected when *map* is updated with
- * perf event file descriptors. The *map* is an array whose size
- * is the number of available CPUs, and each cell contains a value
- * relative to one CPU. The value to retrieve is indicated by
- * *flags*, that contains the index of the CPU to look up, masked
- * with **BPF_F_INDEX_MASK**. Alternatively, *flags* can be set to
- * **BPF_F_CURRENT_CPU** to indicate that the value for the
- * current CPU should be retrieved.
- *
- * Note that before Linux 4.13, only hardware perf event can be
- * retrieved.
- *
- * Also, be aware that the newer helper
- * **bpf_perf_event_read_value**\ () is recommended over
- * **bpf_perf_event_read**\ () in general. The latter has some ABI
- * quirks where error and counter value are used as a return code
- * (which is wrong to do since ranges may overlap). This issue is
- * fixed with **bpf_perf_event_read_value**\ (), which at the same
- * time provides more features over the **bpf_perf_event_read**\
- * () interface. Please refer to the description of
- * **bpf_perf_event_read_value**\ () for details.
- * Return
- * The value of the perf event counter read from the map, or a
- * negative error code in case of failure.
- *
- * int bpf_redirect(u32 ifindex, u64 flags)
- * Description
- * Redirect the packet to another net device of index *ifindex*.
- * This helper is somewhat similar to **bpf_clone_redirect**\
- * (), except that the packet is not cloned, which provides
- * increased performance.
- *
- * Except for XDP, both ingress and egress interfaces can be used
- * for redirection. The **BPF_F_INGRESS** value in *flags* is used
- * to make the distinction (ingress path is selected if the flag
- * is present, egress path otherwise). Currently, XDP only
- * supports redirection to the egress interface, and accepts no
- * flag at all.
- *
- * The same effect can be attained with the more generic
- * **bpf_redirect_map**\ (), which requires specific maps to be
- * used but offers better performance.
- * Return
- * For XDP, the helper returns **XDP_REDIRECT** on success or
- * **XDP_ABORTED** on error. For other program types, the values
- * are **TC_ACT_REDIRECT** on success or **TC_ACT_SHOT** on
- * error.
- *
- * u32 bpf_get_route_realm(struct sk_buff *skb)
- * Description
- * Retrieve the realm or the route, that is to say the
- * **tclassid** field of the destination for the *skb*. The
- * indentifier retrieved is a user-provided tag, similar to the
- * one used with the net_cls cgroup (see description for
- * **bpf_get_cgroup_classid**\ () helper), but here this tag is
- * held by a route (a destination entry), not by a task.
- *
- * Retrieving this identifier works with the clsact TC egress hook
- * (see also **tc-bpf(8)**), or alternatively on conventional
- * classful egress qdiscs, but not on TC ingress path. In case of
- * clsact TC egress hook, this has the advantage that, internally,
- * the destination entry has not been dropped yet in the transmit
- * path. Therefore, the destination entry does not need to be
- * artificially held via **netif_keep_dst**\ () for a classful
- * qdisc until the *skb* is freed.
- *
- * This helper is available only if the kernel was compiled with
- * **CONFIG_IP_ROUTE_CLASSID** configuration option.
- * Return
- * The realm of the route for the packet associated to *skb*, or 0
- * if none was found.
- *
- * int bpf_perf_event_output(struct pt_reg *ctx, struct bpf_map *map, u64 flags, void *data, u64 size)
- * Description
- * Write raw *data* blob into a special BPF perf event held by
- * *map* of type **BPF_MAP_TYPE_PERF_EVENT_ARRAY**. This perf
- * event must have the following attributes: **PERF_SAMPLE_RAW**
- * as **sample_type**, **PERF_TYPE_SOFTWARE** as **type**, and
- * **PERF_COUNT_SW_BPF_OUTPUT** as **config**.
- *
- * The *flags* are used to indicate the index in *map* for which
- * the value must be put, masked with **BPF_F_INDEX_MASK**.
- * Alternatively, *flags* can be set to **BPF_F_CURRENT_CPU**
- * to indicate that the index of the current CPU core should be
- * used.
- *
- * The value to write, of *size*, is passed through eBPF stack and
- * pointed by *data*.
- *
- * The context of the program *ctx* needs also be passed to the
- * helper.
- *
- * On user space, a program willing to read the values needs to
- * call **perf_event_open**\ () on the perf event (either for
- * one or for all CPUs) and to store the file descriptor into the
- * *map*. This must be done before the eBPF program can send data
- * into it. An example is available in file
- * *samples/bpf/trace_output_user.c* in the Linux kernel source
- * tree (the eBPF program counterpart is in
- * *samples/bpf/trace_output_kern.c*).
- *
- * **bpf_perf_event_output**\ () achieves better performance
- * than **bpf_trace_printk**\ () for sharing data with user
- * space, and is much better suitable for streaming data from eBPF
- * programs.
- *
- * Note that this helper is not restricted to tracing use cases
- * and can be used with programs attached to TC or XDP as well,
- * where it allows for passing data to user space listeners. Data
- * can be:
- *
- * * Only custom structs,
- * * Only the packet payload, or
- * * A combination of both.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_skb_load_bytes(const struct sk_buff *skb, u32 offset, void *to, u32 len)
- * Description
- * This helper was provided as an easy way to load data from a
- * packet. It can be used to load *len* bytes from *offset* from
- * the packet associated to *skb*, into the buffer pointed by
- * *to*.
- *
- * Since Linux 4.7, usage of this helper has mostly been replaced
- * by "direct packet access", enabling packet data to be
- * manipulated with *skb*\ **->data** and *skb*\ **->data_end**
- * pointing respectively to the first byte of packet data and to
- * the byte after the last byte of packet data. However, it
- * remains useful if one wishes to read large quantities of data
- * at once from a packet into the eBPF stack.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_get_stackid(struct pt_reg *ctx, struct bpf_map *map, u64 flags)
- * Description
- * Walk a user or a kernel stack and return its id. To achieve
- * this, the helper needs *ctx*, which is a pointer to the context
- * on which the tracing program is executed, and a pointer to a
- * *map* of type **BPF_MAP_TYPE_STACK_TRACE**.
- *
- * The last argument, *flags*, holds the number of stack frames to
- * skip (from 0 to 255), masked with
- * **BPF_F_SKIP_FIELD_MASK**. The next bits can be used to set
- * a combination of the following flags:
- *
- * **BPF_F_USER_STACK**
- * Collect a user space stack instead of a kernel stack.
- * **BPF_F_FAST_STACK_CMP**
- * Compare stacks by hash only.
- * **BPF_F_REUSE_STACKID**
- * If two different stacks hash into the same *stackid*,
- * discard the old one.
- *
- * The stack id retrieved is a 32 bit long integer handle which
- * can be further combined with other data (including other stack
- * ids) and used as a key into maps. This can be useful for
- * generating a variety of graphs (such as flame graphs or off-cpu
- * graphs).
- *
- * For walking a stack, this helper is an improvement over
- * **bpf_probe_read**\ (), which can be used with unrolled loops
- * but is not efficient and consumes a lot of eBPF instructions.
- * Instead, **bpf_get_stackid**\ () can collect up to
- * **PERF_MAX_STACK_DEPTH** both kernel and user frames. Note that
- * this limit can be controlled with the **sysctl** program, and
- * that it should be manually increased in order to profile long
- * user stacks (such as stacks for Java programs). To do so, use:
- *
- * ::
- *
- * # sysctl kernel.perf_event_max_stack=<new value>
- * Return
- * The positive or null stack id on success, or a negative error
- * in case of failure.
- *
- * s64 bpf_csum_diff(__be32 *from, u32 from_size, __be32 *to, u32 to_size, __wsum seed)
- * Description
- * Compute a checksum difference, from the raw buffer pointed by
- * *from*, of length *from_size* (that must be a multiple of 4),
- * towards the raw buffer pointed by *to*, of size *to_size*
- * (same remark). An optional *seed* can be added to the value
- * (this can be cascaded, the seed may come from a previous call
- * to the helper).
- *
- * This is flexible enough to be used in several ways:
- *
- * * With *from_size* == 0, *to_size* > 0 and *seed* set to
- * checksum, it can be used when pushing new data.
- * * With *from_size* > 0, *to_size* == 0 and *seed* set to
- * checksum, it can be used when removing data from a packet.
- * * With *from_size* > 0, *to_size* > 0 and *seed* set to 0, it
- * can be used to compute a diff. Note that *from_size* and
- * *to_size* do not need to be equal.
- *
- * This helper can be used in combination with
- * **bpf_l3_csum_replace**\ () and **bpf_l4_csum_replace**\ (), to
- * which one can feed in the difference computed with
- * **bpf_csum_diff**\ ().
- * Return
- * The checksum result, or a negative error code in case of
- * failure.
- *
- * int bpf_skb_get_tunnel_opt(struct sk_buff *skb, u8 *opt, u32 size)
- * Description
- * Retrieve tunnel options metadata for the packet associated to
- * *skb*, and store the raw tunnel option data to the buffer *opt*
- * of *size*.
- *
- * This helper can be used with encapsulation devices that can
- * operate in "collect metadata" mode (please refer to the related
- * note in the description of **bpf_skb_get_tunnel_key**\ () for
- * more details). A particular example where this can be used is
- * in combination with the Geneve encapsulation protocol, where it
- * allows for pushing (with **bpf_skb_get_tunnel_opt**\ () helper)
- * and retrieving arbitrary TLVs (Type-Length-Value headers) from
- * the eBPF program. This allows for full customization of these
- * headers.
- * Return
- * The size of the option data retrieved.
- *
- * int bpf_skb_set_tunnel_opt(struct sk_buff *skb, u8 *opt, u32 size)
- * Description
- * Set tunnel options metadata for the packet associated to *skb*
- * to the option data contained in the raw buffer *opt* of *size*.
- *
- * See also the description of the **bpf_skb_get_tunnel_opt**\ ()
- * helper for additional information.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_skb_change_proto(struct sk_buff *skb, __be16 proto, u64 flags)
- * Description
- * Change the protocol of the *skb* to *proto*. Currently
- * supported are transition from IPv4 to IPv6, and from IPv6 to
- * IPv4. The helper takes care of the groundwork for the
- * transition, including resizing the socket buffer. The eBPF
- * program is expected to fill the new headers, if any, via
- * **skb_store_bytes**\ () and to recompute the checksums with
- * **bpf_l3_csum_replace**\ () and **bpf_l4_csum_replace**\
- * (). The main case for this helper is to perform NAT64
- * operations out of an eBPF program.
- *
- * Internally, the GSO type is marked as dodgy so that headers are
- * checked and segments are recalculated by the GSO/GRO engine.
- * The size for GSO target is adapted as well.
- *
- * All values for *flags* are reserved for future usage, and must
- * be left at zero.
- *
- * A call to this helper is susceptible to change the underlaying
- * packet buffer. Therefore, at load time, all checks on pointers
- * previously done by the verifier are invalidated and must be
- * performed again, if the helper is used in combination with
- * direct packet access.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_skb_change_type(struct sk_buff *skb, u32 type)
- * Description
- * Change the packet type for the packet associated to *skb*. This
- * comes down to setting *skb*\ **->pkt_type** to *type*, except
- * the eBPF program does not have a write access to *skb*\
- * **->pkt_type** beside this helper. Using a helper here allows
- * for graceful handling of errors.
- *
- * The major use case is to change incoming *skb*s to
- * **PACKET_HOST** in a programmatic way instead of having to
- * recirculate via **redirect**\ (..., **BPF_F_INGRESS**), for
- * example.
- *
- * Note that *type* only allows certain values. At this time, they
- * are:
- *
- * **PACKET_HOST**
- * Packet is for us.
- * **PACKET_BROADCAST**
- * Send packet to all.
- * **PACKET_MULTICAST**
- * Send packet to group.
- * **PACKET_OTHERHOST**
- * Send packet to someone else.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_skb_under_cgroup(struct sk_buff *skb, struct bpf_map *map, u32 index)
- * Description
- * Check whether *skb* is a descendant of the cgroup2 held by
- * *map* of type **BPF_MAP_TYPE_CGROUP_ARRAY**, at *index*.
- * Return
- * The return value depends on the result of the test, and can be:
- *
- * * 0, if the *skb* failed the cgroup2 descendant test.
- * * 1, if the *skb* succeeded the cgroup2 descendant test.
- * * A negative error code, if an error occurred.
- *
- * u32 bpf_get_hash_recalc(struct sk_buff *skb)
- * Description
- * Retrieve the hash of the packet, *skb*\ **->hash**. If it is
- * not set, in particular if the hash was cleared due to mangling,
- * recompute this hash. Later accesses to the hash can be done
- * directly with *skb*\ **->hash**.
- *
- * Calling **bpf_set_hash_invalid**\ (), changing a packet
- * prototype with **bpf_skb_change_proto**\ (), or calling
- * **bpf_skb_store_bytes**\ () with the
- * **BPF_F_INVALIDATE_HASH** are actions susceptible to clear
- * the hash and to trigger a new computation for the next call to
- * **bpf_get_hash_recalc**\ ().
- * Return
- * The 32-bit hash.
- *
- * u64 bpf_get_current_task(void)
- * Return
- * A pointer to the current task struct.
- *
- * int bpf_probe_write_user(void *dst, const void *src, u32 len)
- * Description
- * Attempt in a safe way to write *len* bytes from the buffer
- * *src* to *dst* in memory. It only works for threads that are in
- * user context, and *dst* must be a valid user space address.
- *
- * This helper should not be used to implement any kind of
- * security mechanism because of TOC-TOU attacks, but rather to
- * debug, divert, and manipulate execution of semi-cooperative
- * processes.
- *
- * Keep in mind that this feature is meant for experiments, and it
- * has a risk of crashing the system and running programs.
- * Therefore, when an eBPF program using this helper is attached,
- * a warning including PID and process name is printed to kernel
- * logs.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_current_task_under_cgroup(struct bpf_map *map, u32 index)
- * Description
- * Check whether the probe is being run is the context of a given
- * subset of the cgroup2 hierarchy. The cgroup2 to test is held by
- * *map* of type **BPF_MAP_TYPE_CGROUP_ARRAY**, at *index*.
- * Return
- * The return value depends on the result of the test, and can be:
- *
- * * 0, if the *skb* task belongs to the cgroup2.
- * * 1, if the *skb* task does not belong to the cgroup2.
- * * A negative error code, if an error occurred.
- *
- * int bpf_skb_change_tail(struct sk_buff *skb, u32 len, u64 flags)
- * Description
- * Resize (trim or grow) the packet associated to *skb* to the
- * new *len*. The *flags* are reserved for future usage, and must
- * be left at zero.
- *
- * The basic idea is that the helper performs the needed work to
- * change the size of the packet, then the eBPF program rewrites
- * the rest via helpers like **bpf_skb_store_bytes**\ (),
- * **bpf_l3_csum_replace**\ (), **bpf_l3_csum_replace**\ ()
- * and others. This helper is a slow path utility intended for
- * replies with control messages. And because it is targeted for
- * slow path, the helper itself can afford to be slow: it
- * implicitly linearizes, unclones and drops offloads from the
- * *skb*.
- *
- * A call to this helper is susceptible to change the underlaying
- * packet buffer. Therefore, at load time, all checks on pointers
- * previously done by the verifier are invalidated and must be
- * performed again, if the helper is used in combination with
- * direct packet access.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_skb_pull_data(struct sk_buff *skb, u32 len)
- * Description
- * Pull in non-linear data in case the *skb* is non-linear and not
- * all of *len* are part of the linear section. Make *len* bytes
- * from *skb* readable and writable. If a zero value is passed for
- * *len*, then the whole length of the *skb* is pulled.
- *
- * This helper is only needed for reading and writing with direct
- * packet access.
- *
- * For direct packet access, testing that offsets to access
- * are within packet boundaries (test on *skb*\ **->data_end**) is
- * susceptible to fail if offsets are invalid, or if the requested
- * data is in non-linear parts of the *skb*. On failure the
- * program can just bail out, or in the case of a non-linear
- * buffer, use a helper to make the data available. The
- * **bpf_skb_load_bytes**\ () helper is a first solution to access
- * the data. Another one consists in using **bpf_skb_pull_data**
- * to pull in once the non-linear parts, then retesting and
- * eventually access the data.
- *
- * At the same time, this also makes sure the *skb* is uncloned,
- * which is a necessary condition for direct write. As this needs
- * to be an invariant for the write part only, the verifier
- * detects writes and adds a prologue that is calling
- * **bpf_skb_pull_data()** to effectively unclone the *skb* from
- * the very beginning in case it is indeed cloned.
- *
- * A call to this helper is susceptible to change the underlaying
- * packet buffer. Therefore, at load time, all checks on pointers
- * previously done by the verifier are invalidated and must be
- * performed again, if the helper is used in combination with
- * direct packet access.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * s64 bpf_csum_update(struct sk_buff *skb, __wsum csum)
- * Description
- * Add the checksum *csum* into *skb*\ **->csum** in case the
- * driver has supplied a checksum for the entire packet into that
- * field. Return an error otherwise. This helper is intended to be
- * used in combination with **bpf_csum_diff**\ (), in particular
- * when the checksum needs to be updated after data has been
- * written into the packet through direct packet access.
- * Return
- * The checksum on success, or a negative error code in case of
- * failure.
- *
- * void bpf_set_hash_invalid(struct sk_buff *skb)
- * Description
- * Invalidate the current *skb*\ **->hash**. It can be used after
- * mangling on headers through direct packet access, in order to
- * indicate that the hash is outdated and to trigger a
- * recalculation the next time the kernel tries to access this
- * hash or when the **bpf_get_hash_recalc**\ () helper is called.
- *
- * int bpf_get_numa_node_id(void)
- * Description
- * Return the id of the current NUMA node. The primary use case
- * for this helper is the selection of sockets for the local NUMA
- * node, when the program is attached to sockets using the
- * **SO_ATTACH_REUSEPORT_EBPF** option (see also **socket(7)**),
- * but the helper is also available to other eBPF program types,
- * similarly to **bpf_get_smp_processor_id**\ ().
- * Return
- * The id of current NUMA node.
- *
- * int bpf_skb_change_head(struct sk_buff *skb, u32 len, u64 flags)
- * Description
- * Grows headroom of packet associated to *skb* and adjusts the
- * offset of the MAC header accordingly, adding *len* bytes of
- * space. It automatically extends and reallocates memory as
- * required.
- *
- * This helper can be used on a layer 3 *skb* to push a MAC header
- * for redirection into a layer 2 device.
- *
- * All values for *flags* are reserved for future usage, and must
- * be left at zero.
- *
- * A call to this helper is susceptible to change the underlaying
- * packet buffer. Therefore, at load time, all checks on pointers
- * previously done by the verifier are invalidated and must be
- * performed again, if the helper is used in combination with
- * direct packet access.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_xdp_adjust_head(struct xdp_buff *xdp_md, int delta)
- * Description
- * Adjust (move) *xdp_md*\ **->data** by *delta* bytes. Note that
- * it is possible to use a negative value for *delta*. This helper
- * can be used to prepare the packet for pushing or popping
- * headers.
- *
- * A call to this helper is susceptible to change the underlaying
- * packet buffer. Therefore, at load time, all checks on pointers
- * previously done by the verifier are invalidated and must be
- * performed again, if the helper is used in combination with
- * direct packet access.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_probe_read_str(void *dst, int size, const void *unsafe_ptr)
- * Description
- * Copy a NUL terminated string from an unsafe address
- * *unsafe_ptr* to *dst*. The *size* should include the
- * terminating NUL byte. In case the string length is smaller than
- * *size*, the target is not padded with further NUL bytes. If the
- * string length is larger than *size*, just *size*-1 bytes are
- * copied and the last byte is set to NUL.
- *
- * On success, the length of the copied string is returned. This
- * makes this helper useful in tracing programs for reading
- * strings, and more importantly to get its length at runtime. See
- * the following snippet:
- *
- * ::
- *
- * SEC("kprobe/sys_open")
- * void bpf_sys_open(struct pt_regs *ctx)
- * {
- * char buf[PATHLEN]; // PATHLEN is defined to 256
- * int res = bpf_probe_read_str(buf, sizeof(buf),
- * ctx->di);
- *
- * // Consume buf, for example push it to
- * // userspace via bpf_perf_event_output(); we
- * // can use res (the string length) as event
- * // size, after checking its boundaries.
- * }
- *
- * In comparison, using **bpf_probe_read()** helper here instead
- * to read the string would require to estimate the length at
- * compile time, and would often result in copying more memory
- * than necessary.
- *
- * Another useful use case is when parsing individual process
- * arguments or individual environment variables navigating
- * *current*\ **->mm->arg_start** and *current*\
- * **->mm->env_start**: using this helper and the return value,
- * one can quickly iterate at the right offset of the memory area.
- * Return
- * On success, the strictly positive length of the string,
- * including the trailing NUL character. On error, a negative
- * value.
- *
- * u64 bpf_get_socket_cookie(struct sk_buff *skb)
- * Description
- * If the **struct sk_buff** pointed by *skb* has a known socket,
- * retrieve the cookie (generated by the kernel) of this socket.
- * If no cookie has been set yet, generate a new cookie. Once
- * generated, the socket cookie remains stable for the life of the
- * socket. This helper can be useful for monitoring per socket
- * networking traffic statistics as it provides a unique socket
- * identifier per namespace.
- * Return
- * A 8-byte long non-decreasing number on success, or 0 if the
- * socket field is missing inside *skb*.
- *
- * u64 bpf_get_socket_cookie(struct bpf_sock_addr *ctx)
- * Description
- * Equivalent to bpf_get_socket_cookie() helper that accepts
- * *skb*, but gets socket from **struct bpf_sock_addr** context.
- * Return
- * A 8-byte long non-decreasing number.
- *
- * u64 bpf_get_socket_cookie(struct bpf_sock_ops *ctx)
- * Description
- * Equivalent to bpf_get_socket_cookie() helper that accepts
- * *skb*, but gets socket from **struct bpf_sock_ops** context.
- * Return
- * A 8-byte long non-decreasing number.
- *
- * u32 bpf_get_socket_uid(struct sk_buff *skb)
- * Return
- * The owner UID of the socket associated to *skb*. If the socket
- * is **NULL**, or if it is not a full socket (i.e. if it is a
- * time-wait or a request socket instead), **overflowuid** value
- * is returned (note that **overflowuid** might also be the actual
- * UID value for the socket).
- *
- * u32 bpf_set_hash(struct sk_buff *skb, u32 hash)
- * Description
- * Set the full hash for *skb* (set the field *skb*\ **->hash**)
- * to value *hash*.
- * Return
- * 0
- *
- * int bpf_setsockopt(struct bpf_sock_ops *bpf_socket, int level, int optname, char *optval, int optlen)
- * Description
- * Emulate a call to **setsockopt()** on the socket associated to
- * *bpf_socket*, which must be a full socket. The *level* at
- * which the option resides and the name *optname* of the option
- * must be specified, see **setsockopt(2)** for more information.
- * The option value of length *optlen* is pointed by *optval*.
- *
- * This helper actually implements a subset of **setsockopt()**.
- * It supports the following *level*\ s:
- *
- * * **SOL_SOCKET**, which supports the following *optname*\ s:
- * **SO_RCVBUF**, **SO_SNDBUF**, **SO_MAX_PACING_RATE**,
- * **SO_PRIORITY**, **SO_RCVLOWAT**, **SO_MARK**.
- * * **IPPROTO_TCP**, which supports the following *optname*\ s:
- * **TCP_CONGESTION**, **TCP_BPF_IW**,
- * **TCP_BPF_SNDCWND_CLAMP**.
- * * **IPPROTO_IP**, which supports *optname* **IP_TOS**.
- * * **IPPROTO_IPV6**, which supports *optname* **IPV6_TCLASS**.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_skb_adjust_room(struct sk_buff *skb, s32 len_diff, u32 mode, u64 flags)
- * Description
- * Grow or shrink the room for data in the packet associated to
- * *skb* by *len_diff*, and according to the selected *mode*.
- *
- * There are two supported modes at this time:
- *
- * * **BPF_ADJ_ROOM_MAC**: Adjust room at the mac layer
- * (room space is added or removed below the layer 2 header).
- *
- * * **BPF_ADJ_ROOM_NET**: Adjust room at the network layer
- * (room space is added or removed below the layer 3 header).
- *
- * The following flags are supported at this time:
- *
- * * **BPF_F_ADJ_ROOM_FIXED_GSO**: Do not adjust gso_size.
- * Adjusting mss in this way is not allowed for datagrams.
- *
- * * **BPF_F_ADJ_ROOM_ENCAP_L3_IPV4 **:
- * * **BPF_F_ADJ_ROOM_ENCAP_L3_IPV6 **:
- * Any new space is reserved to hold a tunnel header.
- * Configure skb offsets and other fields accordingly.
- *
- * * **BPF_F_ADJ_ROOM_ENCAP_L4_GRE **:
- * * **BPF_F_ADJ_ROOM_ENCAP_L4_UDP **:
- * Use with ENCAP_L3 flags to further specify the tunnel type.
- *
- * A call to this helper is susceptible to change the underlaying
- * packet buffer. Therefore, at load time, all checks on pointers
- * previously done by the verifier are invalidated and must be
- * performed again, if the helper is used in combination with
- * direct packet access.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_redirect_map(struct bpf_map *map, u32 key, u64 flags)
- * Description
- * Redirect the packet to the endpoint referenced by *map* at
- * index *key*. Depending on its type, this *map* can contain
- * references to net devices (for forwarding packets through other
- * ports), or to CPUs (for redirecting XDP frames to another CPU;
- * but this is only implemented for native XDP (with driver
- * support) as of this writing).
- *
- * All values for *flags* are reserved for future usage, and must
- * be left at zero.
- *
- * When used to redirect packets to net devices, this helper
- * provides a high performance increase over **bpf_redirect**\ ().
- * This is due to various implementation details of the underlying
- * mechanisms, one of which is the fact that **bpf_redirect_map**\
- * () tries to send packet as a "bulk" to the device.
- * Return
- * **XDP_REDIRECT** on success, or **XDP_ABORTED** on error.
- *
- * int bpf_sk_redirect_map(struct bpf_map *map, u32 key, u64 flags)
- * Description
- * Redirect the packet to the socket referenced by *map* (of type
- * **BPF_MAP_TYPE_SOCKMAP**) at index *key*. Both ingress and
- * egress interfaces can be used for redirection. The
- * **BPF_F_INGRESS** value in *flags* is used to make the
- * distinction (ingress path is selected if the flag is present,
- * egress path otherwise). This is the only flag supported for now.
- * Return
- * **SK_PASS** on success, or **SK_DROP** on error.
- *
- * int bpf_sock_map_update(struct bpf_sock_ops *skops, struct bpf_map *map, void *key, u64 flags)
- * Description
- * Add an entry to, or update a *map* referencing sockets. The
- * *skops* is used as a new value for the entry associated to
- * *key*. *flags* is one of:
- *
- * **BPF_NOEXIST**
- * The entry for *key* must not exist in the map.
- * **BPF_EXIST**
- * The entry for *key* must already exist in the map.
- * **BPF_ANY**
- * No condition on the existence of the entry for *key*.
- *
- * If the *map* has eBPF programs (parser and verdict), those will
- * be inherited by the socket being added. If the socket is
- * already attached to eBPF programs, this results in an error.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_xdp_adjust_meta(struct xdp_buff *xdp_md, int delta)
- * Description
- * Adjust the address pointed by *xdp_md*\ **->data_meta** by
- * *delta* (which can be positive or negative). Note that this
- * operation modifies the address stored in *xdp_md*\ **->data**,
- * so the latter must be loaded only after the helper has been
- * called.
- *
- * The use of *xdp_md*\ **->data_meta** is optional and programs
- * are not required to use it. The rationale is that when the
- * packet is processed with XDP (e.g. as DoS filter), it is
- * possible to push further meta data along with it before passing
- * to the stack, and to give the guarantee that an ingress eBPF
- * program attached as a TC classifier on the same device can pick
- * this up for further post-processing. Since TC works with socket
- * buffers, it remains possible to set from XDP the **mark** or
- * **priority** pointers, or other pointers for the socket buffer.
- * Having this scratch space generic and programmable allows for
- * more flexibility as the user is free to store whatever meta
- * data they need.
- *
- * A call to this helper is susceptible to change the underlaying
- * packet buffer. Therefore, at load time, all checks on pointers
- * previously done by the verifier are invalidated and must be
- * performed again, if the helper is used in combination with
- * direct packet access.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_perf_event_read_value(struct bpf_map *map, u64 flags, struct bpf_perf_event_value *buf, u32 buf_size)
- * Description
- * Read the value of a perf event counter, and store it into *buf*
- * of size *buf_size*. This helper relies on a *map* of type
- * **BPF_MAP_TYPE_PERF_EVENT_ARRAY**. The nature of the perf event
- * counter is selected when *map* is updated with perf event file
- * descriptors. The *map* is an array whose size is the number of
- * available CPUs, and each cell contains a value relative to one
- * CPU. The value to retrieve is indicated by *flags*, that
- * contains the index of the CPU to look up, masked with
- * **BPF_F_INDEX_MASK**. Alternatively, *flags* can be set to
- * **BPF_F_CURRENT_CPU** to indicate that the value for the
- * current CPU should be retrieved.
- *
- * This helper behaves in a way close to
- * **bpf_perf_event_read**\ () helper, save that instead of
- * just returning the value observed, it fills the *buf*
- * structure. This allows for additional data to be retrieved: in
- * particular, the enabled and running times (in *buf*\
- * **->enabled** and *buf*\ **->running**, respectively) are
- * copied. In general, **bpf_perf_event_read_value**\ () is
- * recommended over **bpf_perf_event_read**\ (), which has some
- * ABI issues and provides fewer functionalities.
- *
- * These values are interesting, because hardware PMU (Performance
- * Monitoring Unit) counters are limited resources. When there are
- * more PMU based perf events opened than available counters,
- * kernel will multiplex these events so each event gets certain
- * percentage (but not all) of the PMU time. In case that
- * multiplexing happens, the number of samples or counter value
- * will not reflect the case compared to when no multiplexing
- * occurs. This makes comparison between different runs difficult.
- * Typically, the counter value should be normalized before
- * comparing to other experiments. The usual normalization is done
- * as follows.
- *
- * ::
- *
- * normalized_counter = counter * t_enabled / t_running
- *
- * Where t_enabled is the time enabled for event and t_running is
- * the time running for event since last normalization. The
- * enabled and running times are accumulated since the perf event
- * open. To achieve scaling factor between two invocations of an
- * eBPF program, users can can use CPU id as the key (which is
- * typical for perf array usage model) to remember the previous
- * value and do the calculation inside the eBPF program.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_perf_prog_read_value(struct bpf_perf_event_data *ctx, struct bpf_perf_event_value *buf, u32 buf_size)
- * Description
- * For en eBPF program attached to a perf event, retrieve the
- * value of the event counter associated to *ctx* and store it in
- * the structure pointed by *buf* and of size *buf_size*. Enabled
- * and running times are also stored in the structure (see
- * description of helper **bpf_perf_event_read_value**\ () for
- * more details).
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_getsockopt(struct bpf_sock_ops *bpf_socket, int level, int optname, char *optval, int optlen)
- * Description
- * Emulate a call to **getsockopt()** on the socket associated to
- * *bpf_socket*, which must be a full socket. The *level* at
- * which the option resides and the name *optname* of the option
- * must be specified, see **getsockopt(2)** for more information.
- * The retrieved value is stored in the structure pointed by
- * *opval* and of length *optlen*.
- *
- * This helper actually implements a subset of **getsockopt()**.
- * It supports the following *level*\ s:
- *
- * * **IPPROTO_TCP**, which supports *optname*
- * **TCP_CONGESTION**.
- * * **IPPROTO_IP**, which supports *optname* **IP_TOS**.
- * * **IPPROTO_IPV6**, which supports *optname* **IPV6_TCLASS**.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_override_return(struct pt_reg *regs, u64 rc)
- * Description
- * Used for error injection, this helper uses kprobes to override
- * the return value of the probed function, and to set it to *rc*.
- * The first argument is the context *regs* on which the kprobe
- * works.
- *
- * This helper works by setting setting the PC (program counter)
- * to an override function which is run in place of the original
- * probed function. This means the probed function is not run at
- * all. The replacement function just returns with the required
- * value.
- *
- * This helper has security implications, and thus is subject to
- * restrictions. It is only available if the kernel was compiled
- * with the **CONFIG_BPF_KPROBE_OVERRIDE** configuration
- * option, and in this case it only works on functions tagged with
- * **ALLOW_ERROR_INJECTION** in the kernel code.
- *
- * Also, the helper is only available for the architectures having
- * the CONFIG_FUNCTION_ERROR_INJECTION option. As of this writing,
- * x86 architecture is the only one to support this feature.
- * Return
- * 0
- *
- * int bpf_sock_ops_cb_flags_set(struct bpf_sock_ops *bpf_sock, int argval)
- * Description
- * Attempt to set the value of the **bpf_sock_ops_cb_flags** field
- * for the full TCP socket associated to *bpf_sock_ops* to
- * *argval*.
- *
- * The primary use of this field is to determine if there should
- * be calls to eBPF programs of type
- * **BPF_PROG_TYPE_SOCK_OPS** at various points in the TCP
- * code. A program of the same type can change its value, per
- * connection and as necessary, when the connection is
- * established. This field is directly accessible for reading, but
- * this helper must be used for updates in order to return an
- * error if an eBPF program tries to set a callback that is not
- * supported in the current kernel.
- *
- * The supported callback values that *argval* can combine are:
- *
- * * **BPF_SOCK_OPS_RTO_CB_FLAG** (retransmission time out)
- * * **BPF_SOCK_OPS_RETRANS_CB_FLAG** (retransmission)
- * * **BPF_SOCK_OPS_STATE_CB_FLAG** (TCP state change)
- *
- * Here are some examples of where one could call such eBPF
- * program:
- *
- * * When RTO fires.
- * * When a packet is retransmitted.
- * * When the connection terminates.
- * * When a packet is sent.
- * * When a packet is received.
- * Return
- * Code **-EINVAL** if the socket is not a full TCP socket;
- * otherwise, a positive number containing the bits that could not
- * be set is returned (which comes down to 0 if all bits were set
- * as required).
- *
- * int bpf_msg_redirect_map(struct sk_msg_buff *msg, struct bpf_map *map, u32 key, u64 flags)
- * Description
- * This helper is used in programs implementing policies at the
- * socket level. If the message *msg* is allowed to pass (i.e. if
- * the verdict eBPF program returns **SK_PASS**), redirect it to
- * the socket referenced by *map* (of type
- * **BPF_MAP_TYPE_SOCKMAP**) at index *key*. Both ingress and
- * egress interfaces can be used for redirection. The
- * **BPF_F_INGRESS** value in *flags* is used to make the
- * distinction (ingress path is selected if the flag is present,
- * egress path otherwise). This is the only flag supported for now.
- * Return
- * **SK_PASS** on success, or **SK_DROP** on error.
- *
- * int bpf_msg_apply_bytes(struct sk_msg_buff *msg, u32 bytes)
- * Description
- * For socket policies, apply the verdict of the eBPF program to
- * the next *bytes* (number of bytes) of message *msg*.
- *
- * For example, this helper can be used in the following cases:
- *
- * * A single **sendmsg**\ () or **sendfile**\ () system call
- * contains multiple logical messages that the eBPF program is
- * supposed to read and for which it should apply a verdict.
- * * An eBPF program only cares to read the first *bytes* of a
- * *msg*. If the message has a large payload, then setting up
- * and calling the eBPF program repeatedly for all bytes, even
- * though the verdict is already known, would create unnecessary
- * overhead.
- *
- * When called from within an eBPF program, the helper sets a
- * counter internal to the BPF infrastructure, that is used to
- * apply the last verdict to the next *bytes*. If *bytes* is
- * smaller than the current data being processed from a
- * **sendmsg**\ () or **sendfile**\ () system call, the first
- * *bytes* will be sent and the eBPF program will be re-run with
- * the pointer for start of data pointing to byte number *bytes*
- * **+ 1**. If *bytes* is larger than the current data being
- * processed, then the eBPF verdict will be applied to multiple
- * **sendmsg**\ () or **sendfile**\ () calls until *bytes* are
- * consumed.
- *
- * Note that if a socket closes with the internal counter holding
- * a non-zero value, this is not a problem because data is not
- * being buffered for *bytes* and is sent as it is received.
- * Return
- * 0
- *
- * int bpf_msg_cork_bytes(struct sk_msg_buff *msg, u32 bytes)
- * Description
- * For socket policies, prevent the execution of the verdict eBPF
- * program for message *msg* until *bytes* (byte number) have been
- * accumulated.
- *
- * This can be used when one needs a specific number of bytes
- * before a verdict can be assigned, even if the data spans
- * multiple **sendmsg**\ () or **sendfile**\ () calls. The extreme
- * case would be a user calling **sendmsg**\ () repeatedly with
- * 1-byte long message segments. Obviously, this is bad for
- * performance, but it is still valid. If the eBPF program needs
- * *bytes* bytes to validate a header, this helper can be used to
- * prevent the eBPF program to be called again until *bytes* have
- * been accumulated.
- * Return
- * 0
- *
- * int bpf_msg_pull_data(struct sk_msg_buff *msg, u32 start, u32 end, u64 flags)
- * Description
- * For socket policies, pull in non-linear data from user space
- * for *msg* and set pointers *msg*\ **->data** and *msg*\
- * **->data_end** to *start* and *end* bytes offsets into *msg*,
- * respectively.
- *
- * If a program of type **BPF_PROG_TYPE_SK_MSG** is run on a
- * *msg* it can only parse data that the (**data**, **data_end**)
- * pointers have already consumed. For **sendmsg**\ () hooks this
- * is likely the first scatterlist element. But for calls relying
- * on the **sendpage** handler (e.g. **sendfile**\ ()) this will
- * be the range (**0**, **0**) because the data is shared with
- * user space and by default the objective is to avoid allowing
- * user space to modify data while (or after) eBPF verdict is
- * being decided. This helper can be used to pull in data and to
- * set the start and end pointer to given values. Data will be
- * copied if necessary (i.e. if data was not linear and if start
- * and end pointers do not point to the same chunk).
- *
- * A call to this helper is susceptible to change the underlaying
- * packet buffer. Therefore, at load time, all checks on pointers
- * previously done by the verifier are invalidated and must be
- * performed again, if the helper is used in combination with
- * direct packet access.
- *
- * All values for *flags* are reserved for future usage, and must
- * be left at zero.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_bind(struct bpf_sock_addr *ctx, struct sockaddr *addr, int addr_len)
- * Description
- * Bind the socket associated to *ctx* to the address pointed by
- * *addr*, of length *addr_len*. This allows for making outgoing
- * connection from the desired IP address, which can be useful for
- * example when all processes inside a cgroup should use one
- * single IP address on a host that has multiple IP configured.
- *
- * This helper works for IPv4 and IPv6, TCP and UDP sockets. The
- * domain (*addr*\ **->sa_family**) must be **AF_INET** (or
- * **AF_INET6**). Looking for a free port to bind to can be
- * expensive, therefore binding to port is not permitted by the
- * helper: *addr*\ **->sin_port** (or **sin6_port**, respectively)
- * must be set to zero.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_xdp_adjust_tail(struct xdp_buff *xdp_md, int delta)
- * Description
- * Adjust (move) *xdp_md*\ **->data_end** by *delta* bytes. It is
- * only possible to shrink the packet as of this writing,
- * therefore *delta* must be a negative integer.
- *
- * A call to this helper is susceptible to change the underlaying
- * packet buffer. Therefore, at load time, all checks on pointers
- * previously done by the verifier are invalidated and must be
- * performed again, if the helper is used in combination with
- * direct packet access.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_skb_get_xfrm_state(struct sk_buff *skb, u32 index, struct bpf_xfrm_state *xfrm_state, u32 size, u64 flags)
- * Description
- * Retrieve the XFRM state (IP transform framework, see also
- * **ip-xfrm(8)**) at *index* in XFRM "security path" for *skb*.
- *
- * The retrieved value is stored in the **struct bpf_xfrm_state**
- * pointed by *xfrm_state* and of length *size*.
- *
- * All values for *flags* are reserved for future usage, and must
- * be left at zero.
- *
- * This helper is available only if the kernel was compiled with
- * **CONFIG_XFRM** configuration option.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_get_stack(struct pt_regs *regs, void *buf, u32 size, u64 flags)
- * Description
- * Return a user or a kernel stack in bpf program provided buffer.
- * To achieve this, the helper needs *ctx*, which is a pointer
- * to the context on which the tracing program is executed.
- * To store the stacktrace, the bpf program provides *buf* with
- * a nonnegative *size*.
- *
- * The last argument, *flags*, holds the number of stack frames to
- * skip (from 0 to 255), masked with
- * **BPF_F_SKIP_FIELD_MASK**. The next bits can be used to set
- * the following flags:
- *
- * **BPF_F_USER_STACK**
- * Collect a user space stack instead of a kernel stack.
- * **BPF_F_USER_BUILD_ID**
- * Collect buildid+offset instead of ips for user stack,
- * only valid if **BPF_F_USER_STACK** is also specified.
- *
- * **bpf_get_stack**\ () can collect up to
- * **PERF_MAX_STACK_DEPTH** both kernel and user frames, subject
- * to sufficient large buffer size. Note that
- * this limit can be controlled with the **sysctl** program, and
- * that it should be manually increased in order to profile long
- * user stacks (such as stacks for Java programs). To do so, use:
- *
- * ::
- *
- * # sysctl kernel.perf_event_max_stack=<new value>
- * Return
- * A non-negative value equal to or less than *size* on success,
- * or a negative error in case of failure.
- *
- * int bpf_skb_load_bytes_relative(const struct sk_buff *skb, u32 offset, void *to, u32 len, u32 start_header)
- * Description
- * This helper is similar to **bpf_skb_load_bytes**\ () in that
- * it provides an easy way to load *len* bytes from *offset*
- * from the packet associated to *skb*, into the buffer pointed
- * by *to*. The difference to **bpf_skb_load_bytes**\ () is that
- * a fifth argument *start_header* exists in order to select a
- * base offset to start from. *start_header* can be one of:
- *
- * **BPF_HDR_START_MAC**
- * Base offset to load data from is *skb*'s mac header.
- * **BPF_HDR_START_NET**
- * Base offset to load data from is *skb*'s network header.
- *
- * In general, "direct packet access" is the preferred method to
- * access packet data, however, this helper is in particular useful
- * in socket filters where *skb*\ **->data** does not always point
- * to the start of the mac header and where "direct packet access"
- * is not available.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_fib_lookup(void *ctx, struct bpf_fib_lookup *params, int plen, u32 flags)
- * Description
- * Do FIB lookup in kernel tables using parameters in *params*.
- * If lookup is successful and result shows packet is to be
- * forwarded, the neighbor tables are searched for the nexthop.
- * If successful (ie., FIB lookup shows forwarding and nexthop
- * is resolved), the nexthop address is returned in ipv4_dst
- * or ipv6_dst based on family, smac is set to mac address of
- * egress device, dmac is set to nexthop mac address, rt_metric
- * is set to metric from route (IPv4/IPv6 only), and ifindex
- * is set to the device index of the nexthop from the FIB lookup.
- *
- * *plen* argument is the size of the passed in struct.
- * *flags* argument can be a combination of one or more of the
- * following values:
- *
- * **BPF_FIB_LOOKUP_DIRECT**
- * Do a direct table lookup vs full lookup using FIB
- * rules.
- * **BPF_FIB_LOOKUP_OUTPUT**
- * Perform lookup from an egress perspective (default is
- * ingress).
- *
- * *ctx* is either **struct xdp_md** for XDP programs or
- * **struct sk_buff** tc cls_act programs.
- * Return
- * * < 0 if any input argument is invalid
- * * 0 on success (packet is forwarded, nexthop neighbor exists)
- * * > 0 one of **BPF_FIB_LKUP_RET_** codes explaining why the
- * packet is not forwarded or needs assist from full stack
- *
- * int bpf_sock_hash_update(struct bpf_sock_ops_kern *skops, struct bpf_map *map, void *key, u64 flags)
- * Description
- * Add an entry to, or update a sockhash *map* referencing sockets.
- * The *skops* is used as a new value for the entry associated to
- * *key*. *flags* is one of:
- *
- * **BPF_NOEXIST**
- * The entry for *key* must not exist in the map.
- * **BPF_EXIST**
- * The entry for *key* must already exist in the map.
- * **BPF_ANY**
- * No condition on the existence of the entry for *key*.
- *
- * If the *map* has eBPF programs (parser and verdict), those will
- * be inherited by the socket being added. If the socket is
- * already attached to eBPF programs, this results in an error.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_msg_redirect_hash(struct sk_msg_buff *msg, struct bpf_map *map, void *key, u64 flags)
- * Description
- * This helper is used in programs implementing policies at the
- * socket level. If the message *msg* is allowed to pass (i.e. if
- * the verdict eBPF program returns **SK_PASS**), redirect it to
- * the socket referenced by *map* (of type
- * **BPF_MAP_TYPE_SOCKHASH**) using hash *key*. Both ingress and
- * egress interfaces can be used for redirection. The
- * **BPF_F_INGRESS** value in *flags* is used to make the
- * distinction (ingress path is selected if the flag is present,
- * egress path otherwise). This is the only flag supported for now.
- * Return
- * **SK_PASS** on success, or **SK_DROP** on error.
- *
- * int bpf_sk_redirect_hash(struct sk_buff *skb, struct bpf_map *map, void *key, u64 flags)
- * Description
- * This helper is used in programs implementing policies at the
- * skb socket level. If the sk_buff *skb* is allowed to pass (i.e.
- * if the verdeict eBPF program returns **SK_PASS**), redirect it
- * to the socket referenced by *map* (of type
- * **BPF_MAP_TYPE_SOCKHASH**) using hash *key*. Both ingress and
- * egress interfaces can be used for redirection. The
- * **BPF_F_INGRESS** value in *flags* is used to make the
- * distinction (ingress path is selected if the flag is present,
- * egress otherwise). This is the only flag supported for now.
- * Return
- * **SK_PASS** on success, or **SK_DROP** on error.
- *
- * int bpf_lwt_push_encap(struct sk_buff *skb, u32 type, void *hdr, u32 len)
- * Description
- * Encapsulate the packet associated to *skb* within a Layer 3
- * protocol header. This header is provided in the buffer at
- * address *hdr*, with *len* its size in bytes. *type* indicates
- * the protocol of the header and can be one of:
- *
- * **BPF_LWT_ENCAP_SEG6**
- * IPv6 encapsulation with Segment Routing Header
- * (**struct ipv6_sr_hdr**). *hdr* only contains the SRH,
- * the IPv6 header is computed by the kernel.
- * **BPF_LWT_ENCAP_SEG6_INLINE**
- * Only works if *skb* contains an IPv6 packet. Insert a
- * Segment Routing Header (**struct ipv6_sr_hdr**) inside
- * the IPv6 header.
- * **BPF_LWT_ENCAP_IP**
- * IP encapsulation (GRE/GUE/IPIP/etc). The outer header
- * must be IPv4 or IPv6, followed by zero or more
- * additional headers, up to LWT_BPF_MAX_HEADROOM total
- * bytes in all prepended headers. Please note that
- * if skb_is_gso(skb) is true, no more than two headers
- * can be prepended, and the inner header, if present,
- * should be either GRE or UDP/GUE.
- *
- * BPF_LWT_ENCAP_SEG6*** types can be called by bpf programs of
- * type BPF_PROG_TYPE_LWT_IN; BPF_LWT_ENCAP_IP type can be called
- * by bpf programs of types BPF_PROG_TYPE_LWT_IN and
- * BPF_PROG_TYPE_LWT_XMIT.
- *
- * A call to this helper is susceptible to change the underlaying
- * packet buffer. Therefore, at load time, all checks on pointers
- * previously done by the verifier are invalidated and must be
- * performed again, if the helper is used in combination with
- * direct packet access.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_lwt_seg6_store_bytes(struct sk_buff *skb, u32 offset, const void *from, u32 len)
- * Description
- * Store *len* bytes from address *from* into the packet
- * associated to *skb*, at *offset*. Only the flags, tag and TLVs
- * inside the outermost IPv6 Segment Routing Header can be
- * modified through this helper.
- *
- * A call to this helper is susceptible to change the underlaying
- * packet buffer. Therefore, at load time, all checks on pointers
- * previously done by the verifier are invalidated and must be
- * performed again, if the helper is used in combination with
- * direct packet access.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_lwt_seg6_adjust_srh(struct sk_buff *skb, u32 offset, s32 delta)
- * Description
- * Adjust the size allocated to TLVs in the outermost IPv6
- * Segment Routing Header contained in the packet associated to
- * *skb*, at position *offset* by *delta* bytes. Only offsets
- * after the segments are accepted. *delta* can be as well
- * positive (growing) as negative (shrinking).
- *
- * A call to this helper is susceptible to change the underlaying
- * packet buffer. Therefore, at load time, all checks on pointers
- * previously done by the verifier are invalidated and must be
- * performed again, if the helper is used in combination with
- * direct packet access.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_lwt_seg6_action(struct sk_buff *skb, u32 action, void *param, u32 param_len)
- * Description
- * Apply an IPv6 Segment Routing action of type *action* to the
- * packet associated to *skb*. Each action takes a parameter
- * contained at address *param*, and of length *param_len* bytes.
- * *action* can be one of:
- *
- * **SEG6_LOCAL_ACTION_END_X**
- * End.X action: Endpoint with Layer-3 cross-connect.
- * Type of *param*: **struct in6_addr**.
- * **SEG6_LOCAL_ACTION_END_T**
- * End.T action: Endpoint with specific IPv6 table lookup.
- * Type of *param*: **int**.
- * **SEG6_LOCAL_ACTION_END_B6**
- * End.B6 action: Endpoint bound to an SRv6 policy.
- * Type of param: **struct ipv6_sr_hdr**.
- * **SEG6_LOCAL_ACTION_END_B6_ENCAP**
- * End.B6.Encap action: Endpoint bound to an SRv6
- * encapsulation policy.
- * Type of param: **struct ipv6_sr_hdr**.
- *
- * A call to this helper is susceptible to change the underlaying
- * packet buffer. Therefore, at load time, all checks on pointers
- * previously done by the verifier are invalidated and must be
- * performed again, if the helper is used in combination with
- * direct packet access.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_rc_repeat(void *ctx)
- * Description
- * This helper is used in programs implementing IR decoding, to
- * report a successfully decoded repeat key message. This delays
- * the generation of a key up event for previously generated
- * key down event.
- *
- * Some IR protocols like NEC have a special IR message for
- * repeating last button, for when a button is held down.
- *
- * The *ctx* should point to the lirc sample as passed into
- * the program.
- *
- * This helper is only available is the kernel was compiled with
- * the **CONFIG_BPF_LIRC_MODE2** configuration option set to
- * "**y**".
- * Return
- * 0
- *
- * int bpf_rc_keydown(void *ctx, u32 protocol, u64 scancode, u32 toggle)
- * Description
- * This helper is used in programs implementing IR decoding, to
- * report a successfully decoded key press with *scancode*,
- * *toggle* value in the given *protocol*. The scancode will be
- * translated to a keycode using the rc keymap, and reported as
- * an input key down event. After a period a key up event is
- * generated. This period can be extended by calling either
- * **bpf_rc_keydown**\ () again with the same values, or calling
- * **bpf_rc_repeat**\ ().
- *
- * Some protocols include a toggle bit, in case the button was
- * released and pressed again between consecutive scancodes.
- *
- * The *ctx* should point to the lirc sample as passed into
- * the program.
- *
- * The *protocol* is the decoded protocol number (see
- * **enum rc_proto** for some predefined values).
- *
- * This helper is only available is the kernel was compiled with
- * the **CONFIG_BPF_LIRC_MODE2** configuration option set to
- * "**y**".
- * Return
- * 0
- *
- * u64 bpf_skb_cgroup_id(struct sk_buff *skb)
- * Description
- * Return the cgroup v2 id of the socket associated with the *skb*.
- * This is roughly similar to the **bpf_get_cgroup_classid**\ ()
- * helper for cgroup v1 by providing a tag resp. identifier that
- * can be matched on or used for map lookups e.g. to implement
- * policy. The cgroup v2 id of a given path in the hierarchy is
- * exposed in user space through the f_handle API in order to get
- * to the same 64-bit id.
- *
- * This helper can be used on TC egress path, but not on ingress,
- * and is available only if the kernel was compiled with the
- * **CONFIG_SOCK_CGROUP_DATA** configuration option.
- * Return
- * The id is returned or 0 in case the id could not be retrieved.
- *
- * u64 bpf_get_current_cgroup_id(void)
- * Return
- * A 64-bit integer containing the current cgroup id based
- * on the cgroup within which the current task is running.
- *
- * void *bpf_get_local_storage(void *map, u64 flags)
- * Description
- * Get the pointer to the local storage area.
- * The type and the size of the local storage is defined
- * by the *map* argument.
- * The *flags* meaning is specific for each map type,
- * and has to be 0 for cgroup local storage.
- *
- * Depending on the BPF program type, a local storage area
- * can be shared between multiple instances of the BPF program,
- * running simultaneously.
- *
- * A user should care about the synchronization by himself.
- * For example, by using the **BPF_STX_XADD** instruction to alter
- * the shared data.
- * Return
- * A pointer to the local storage area.
- *
- * int bpf_sk_select_reuseport(struct sk_reuseport_md *reuse, struct bpf_map *map, void *key, u64 flags)
- * Description
- * Select a **SO_REUSEPORT** socket from a
- * **BPF_MAP_TYPE_REUSEPORT_ARRAY** *map*.
- * It checks the selected socket is matching the incoming
- * request in the socket buffer.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * u64 bpf_skb_ancestor_cgroup_id(struct sk_buff *skb, int ancestor_level)
- * Description
- * Return id of cgroup v2 that is ancestor of cgroup associated
- * with the *skb* at the *ancestor_level*. The root cgroup is at
- * *ancestor_level* zero and each step down the hierarchy
- * increments the level. If *ancestor_level* == level of cgroup
- * associated with *skb*, then return value will be same as that
- * of **bpf_skb_cgroup_id**\ ().
- *
- * The helper is useful to implement policies based on cgroups
- * that are upper in hierarchy than immediate cgroup associated
- * with *skb*.
- *
- * The format of returned id and helper limitations are same as in
- * **bpf_skb_cgroup_id**\ ().
- * Return
- * The id is returned or 0 in case the id could not be retrieved.
- *
- * struct bpf_sock *bpf_sk_lookup_tcp(void *ctx, struct bpf_sock_tuple *tuple, u32 tuple_size, u64 netns, u64 flags)
- * Description
- * Look for TCP socket matching *tuple*, optionally in a child
- * network namespace *netns*. The return value must be checked,
- * and if non-**NULL**, released via **bpf_sk_release**\ ().
- *
- * The *ctx* should point to the context of the program, such as
- * the skb or socket (depending on the hook in use). This is used
- * to determine the base network namespace for the lookup.
- *
- * *tuple_size* must be one of:
- *
- * **sizeof**\ (*tuple*\ **->ipv4**)
- * Look for an IPv4 socket.
- * **sizeof**\ (*tuple*\ **->ipv6**)
- * Look for an IPv6 socket.
- *
- * If the *netns* is a negative signed 32-bit integer, then the
- * socket lookup table in the netns associated with the *ctx* will
- * will be used. For the TC hooks, this is the netns of the device
- * in the skb. For socket hooks, this is the netns of the socket.
- * If *netns* is any other signed 32-bit value greater than or
- * equal to zero then it specifies the ID of the netns relative to
- * the netns associated with the *ctx*. *netns* values beyond the
- * range of 32-bit integers are reserved for future use.
- *
- * All values for *flags* are reserved for future usage, and must
- * be left at zero.
- *
- * This helper is available only if the kernel was compiled with
- * **CONFIG_NET** configuration option.
- * Return
- * Pointer to **struct bpf_sock**, or **NULL** in case of failure.
- * For sockets with reuseport option, the **struct bpf_sock**
- * result is from **reuse->socks**\ [] using the hash of the tuple.
- *
- * struct bpf_sock *bpf_sk_lookup_udp(void *ctx, struct bpf_sock_tuple *tuple, u32 tuple_size, u64 netns, u64 flags)
- * Description
- * Look for UDP socket matching *tuple*, optionally in a child
- * network namespace *netns*. The return value must be checked,
- * and if non-**NULL**, released via **bpf_sk_release**\ ().
- *
- * The *ctx* should point to the context of the program, such as
- * the skb or socket (depending on the hook in use). This is used
- * to determine the base network namespace for the lookup.
- *
- * *tuple_size* must be one of:
- *
- * **sizeof**\ (*tuple*\ **->ipv4**)
- * Look for an IPv4 socket.
- * **sizeof**\ (*tuple*\ **->ipv6**)
- * Look for an IPv6 socket.
- *
- * If the *netns* is a negative signed 32-bit integer, then the
- * socket lookup table in the netns associated with the *ctx* will
- * will be used. For the TC hooks, this is the netns of the device
- * in the skb. For socket hooks, this is the netns of the socket.
- * If *netns* is any other signed 32-bit value greater than or
- * equal to zero then it specifies the ID of the netns relative to
- * the netns associated with the *ctx*. *netns* values beyond the
- * range of 32-bit integers are reserved for future use.
- *
- * All values for *flags* are reserved for future usage, and must
- * be left at zero.
- *
- * This helper is available only if the kernel was compiled with
- * **CONFIG_NET** configuration option.
- * Return
- * Pointer to **struct bpf_sock**, or **NULL** in case of failure.
- * For sockets with reuseport option, the **struct bpf_sock**
- * result is from **reuse->socks**\ [] using the hash of the tuple.
- *
- * int bpf_sk_release(struct bpf_sock *sock)
- * Description
- * Release the reference held by *sock*. *sock* must be a
- * non-**NULL** pointer that was returned from
- * **bpf_sk_lookup_xxx**\ ().
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_map_push_elem(struct bpf_map *map, const void *value, u64 flags)
- * Description
- * Push an element *value* in *map*. *flags* is one of:
- *
- * **BPF_EXIST**
- * If the queue/stack is full, the oldest element is
- * removed to make room for this.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_map_pop_elem(struct bpf_map *map, void *value)
- * Description
- * Pop an element from *map*.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_map_peek_elem(struct bpf_map *map, void *value)
- * Description
- * Get an element from *map* without removing it.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_msg_push_data(struct sk_buff *skb, u32 start, u32 len, u64 flags)
- * Description
- * For socket policies, insert *len* bytes into *msg* at offset
- * *start*.
- *
- * If a program of type **BPF_PROG_TYPE_SK_MSG** is run on a
- * *msg* it may want to insert metadata or options into the *msg*.
- * This can later be read and used by any of the lower layer BPF
- * hooks.
- *
- * This helper may fail if under memory pressure (a malloc
- * fails) in these cases BPF programs will get an appropriate
- * error and BPF programs will need to handle them.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_msg_pop_data(struct sk_msg_buff *msg, u32 start, u32 pop, u64 flags)
- * Description
- * Will remove *pop* bytes from a *msg* starting at byte *start*.
- * This may result in **ENOMEM** errors under certain situations if
- * an allocation and copy are required due to a full ring buffer.
- * However, the helper will try to avoid doing the allocation
- * if possible. Other errors can occur if input parameters are
- * invalid either due to *start* byte not being valid part of *msg*
- * payload and/or *pop* value being to large.
- * Return
- * 0 on success, or a negative error in case of failure.
- *
- * int bpf_rc_pointer_rel(void *ctx, s32 rel_x, s32 rel_y)
- * Description
- * This helper is used in programs implementing IR decoding, to
- * report a successfully decoded pointer movement.
- *
- * The *ctx* should point to the lirc sample as passed into
- * the program.
- *
- * This helper is only available is the kernel was compiled with
- * the **CONFIG_BPF_LIRC_MODE2** configuration option set to
- * "**y**".
- * Return
- * 0
- *
- * int bpf_spin_lock(struct bpf_spin_lock *lock)
- * Description
- * Acquire a spinlock represented by the pointer *lock*, which is
- * stored as part of a value of a map. Taking the lock allows to
- * safely update the rest of the fields in that value. The
- * spinlock can (and must) later be released with a call to
- * **bpf_spin_unlock**\ (\ *lock*\ ).
- *
- * Spinlocks in BPF programs come with a number of restrictions
- * and constraints:
- *
- * * **bpf_spin_lock** objects are only allowed inside maps of
- * types **BPF_MAP_TYPE_HASH** and **BPF_MAP_TYPE_ARRAY** (this
- * list could be extended in the future).
- * * BTF description of the map is mandatory.
- * * The BPF program can take ONE lock at a time, since taking two
- * or more could cause dead locks.
- * * Only one **struct bpf_spin_lock** is allowed per map element.
- * * When the lock is taken, calls (either BPF to BPF or helpers)
- * are not allowed.
- * * The **BPF_LD_ABS** and **BPF_LD_IND** instructions are not
- * allowed inside a spinlock-ed region.
- * * The BPF program MUST call **bpf_spin_unlock**\ () to release
- * the lock, on all execution paths, before it returns.
- * * The BPF program can access **struct bpf_spin_lock** only via
- * the **bpf_spin_lock**\ () and **bpf_spin_unlock**\ ()
- * helpers. Loading or storing data into the **struct
- * bpf_spin_lock** *lock*\ **;** field of a map is not allowed.
- * * To use the **bpf_spin_lock**\ () helper, the BTF description
- * of the map value must be a struct and have **struct
- * bpf_spin_lock** *anyname*\ **;** field at the top level.
- * Nested lock inside another struct is not allowed.
- * * The **struct bpf_spin_lock** *lock* field in a map value must
- * be aligned on a multiple of 4 bytes in that value.
- * * Syscall with command **BPF_MAP_LOOKUP_ELEM** does not copy
- * the **bpf_spin_lock** field to user space.
- * * Syscall with command **BPF_MAP_UPDATE_ELEM**, or update from
- * a BPF program, do not update the **bpf_spin_lock** field.
- * * **bpf_spin_lock** cannot be on the stack or inside a
- * networking packet (it can only be inside of a map values).
- * * **bpf_spin_lock** is available to root only.
- * * Tracing programs and socket filter programs cannot use
- * **bpf_spin_lock**\ () due to insufficient preemption checks
- * (but this may change in the future).
- * * **bpf_spin_lock** is not allowed in inner maps of map-in-map.
- * Return
- * 0
- *
- * int bpf_spin_unlock(struct bpf_spin_lock *lock)
- * Description
- * Release the *lock* previously locked by a call to
- * **bpf_spin_lock**\ (\ *lock*\ ).
- * Return
- * 0
- *
- * struct bpf_sock *bpf_sk_fullsock(struct bpf_sock *sk)
- * Description
- * This helper gets a **struct bpf_sock** pointer such
- * that all the fields in this **bpf_sock** can be accessed.
- * Return
- * A **struct bpf_sock** pointer on success, or **NULL** in
- * case of failure.
- *
- * struct bpf_tcp_sock *bpf_tcp_sock(struct bpf_sock *sk)
- * Description
- * This helper gets a **struct bpf_tcp_sock** pointer from a
- * **struct bpf_sock** pointer.
- * Return
- * A **struct bpf_tcp_sock** pointer on success, or **NULL** in
- * case of failure.
- *
- * int bpf_skb_ecn_set_ce(struct sk_buf *skb)
- * Description
- * Set ECN (Explicit Congestion Notification) field of IP header
- * to **CE** (Congestion Encountered) if current value is **ECT**
- * (ECN Capable Transport). Otherwise, do nothing. Works with IPv6
- * and IPv4.
- * Return
- * 1 if the **CE** flag is set (either by the current helper call
- * or because it was already present), 0 if it is not set.
- *
- * struct bpf_sock *bpf_get_listener_sock(struct bpf_sock *sk)
- * Description
- * Return a **struct bpf_sock** pointer in **TCP_LISTEN** state.
- * **bpf_sk_release**\ () is unnecessary and not allowed.
- * Return
- * A **struct bpf_sock** pointer on success, or **NULL** in
- * case of failure.
- *
- * struct bpf_sock *bpf_skc_lookup_tcp(void *ctx, struct bpf_sock_tuple *tuple, u32 tuple_size, u64 netns, u64 flags)
- * Description
- * Look for TCP socket matching *tuple*, optionally in a child
- * network namespace *netns*. The return value must be checked,
- * and if non-**NULL**, released via **bpf_sk_release**\ ().
- *
- * This function is identical to bpf_sk_lookup_tcp, except that it
- * also returns timewait or request sockets. Use bpf_sk_fullsock
- * or bpf_tcp_socket to access the full structure.
- *
- * This helper is available only if the kernel was compiled with
- * **CONFIG_NET** configuration option.
- * Return
- * Pointer to **struct bpf_sock**, or **NULL** in case of failure.
- * For sockets with reuseport option, the **struct bpf_sock**
- * result is from **reuse->socks**\ [] using the hash of the tuple.
- *
- * int bpf_tcp_check_syncookie(struct bpf_sock *sk, void *iph, u32 iph_len, struct tcphdr *th, u32 th_len)
- * Description
- * Check whether iph and th contain a valid SYN cookie ACK for
- * the listening socket in sk.
- *
- * iph points to the start of the IPv4 or IPv6 header, while
- * iph_len contains sizeof(struct iphdr) or sizeof(struct ip6hdr).
- *
- * th points to the start of the TCP header, while th_len contains
- * sizeof(struct tcphdr).
- *
- * Return
- * 0 if iph and th are a valid SYN cookie ACK, or a negative error
- * otherwise.
- */
-#define __BPF_FUNC_MAPPER(FN) \
- FN(unspec), \
- FN(map_lookup_elem), \
- FN(map_update_elem), \
- FN(map_delete_elem), \
- FN(probe_read), \
- FN(ktime_get_ns), \
- FN(trace_printk), \
- FN(get_prandom_u32), \
- FN(get_smp_processor_id), \
- FN(skb_store_bytes), \
- FN(l3_csum_replace), \
- FN(l4_csum_replace), \
- FN(tail_call), \
- FN(clone_redirect), \
- FN(get_current_pid_tgid), \
- FN(get_current_uid_gid), \
- FN(get_current_comm), \
- FN(get_cgroup_classid), \
- FN(skb_vlan_push), \
- FN(skb_vlan_pop), \
- FN(skb_get_tunnel_key), \
- FN(skb_set_tunnel_key), \
- FN(perf_event_read), \
- FN(redirect), \
- FN(get_route_realm), \
- FN(perf_event_output), \
- FN(skb_load_bytes), \
- FN(get_stackid), \
- FN(csum_diff), \
- FN(skb_get_tunnel_opt), \
- FN(skb_set_tunnel_opt), \
- FN(skb_change_proto), \
- FN(skb_change_type), \
- FN(skb_under_cgroup), \
- FN(get_hash_recalc), \
- FN(get_current_task), \
- FN(probe_write_user), \
- FN(current_task_under_cgroup), \
- FN(skb_change_tail), \
- FN(skb_pull_data), \
- FN(csum_update), \
- FN(set_hash_invalid), \
- FN(get_numa_node_id), \
- FN(skb_change_head), \
- FN(xdp_adjust_head), \
- FN(probe_read_str), \
- FN(get_socket_cookie), \
- FN(get_socket_uid), \
- FN(set_hash), \
- FN(setsockopt), \
- FN(skb_adjust_room), \
- FN(redirect_map), \
- FN(sk_redirect_map), \
- FN(sock_map_update), \
- FN(xdp_adjust_meta), \
- FN(perf_event_read_value), \
- FN(perf_prog_read_value), \
- FN(getsockopt), \
- FN(override_return), \
- FN(sock_ops_cb_flags_set), \
- FN(msg_redirect_map), \
- FN(msg_apply_bytes), \
- FN(msg_cork_bytes), \
- FN(msg_pull_data), \
- FN(bind), \
- FN(xdp_adjust_tail), \
- FN(skb_get_xfrm_state), \
- FN(get_stack), \
- FN(skb_load_bytes_relative), \
- FN(fib_lookup), \
- FN(sock_hash_update), \
- FN(msg_redirect_hash), \
- FN(sk_redirect_hash), \
- FN(lwt_push_encap), \
- FN(lwt_seg6_store_bytes), \
- FN(lwt_seg6_adjust_srh), \
- FN(lwt_seg6_action), \
- FN(rc_repeat), \
- FN(rc_keydown), \
- FN(skb_cgroup_id), \
- FN(get_current_cgroup_id), \
- FN(get_local_storage), \
- FN(sk_select_reuseport), \
- FN(skb_ancestor_cgroup_id), \
- FN(sk_lookup_tcp), \
- FN(sk_lookup_udp), \
- FN(sk_release), \
- FN(map_push_elem), \
- FN(map_pop_elem), \
- FN(map_peek_elem), \
- FN(msg_push_data), \
- FN(msg_pop_data), \
- FN(rc_pointer_rel), \
- FN(spin_lock), \
- FN(spin_unlock), \
- FN(sk_fullsock), \
- FN(tcp_sock), \
- FN(skb_ecn_set_ce), \
- FN(get_listener_sock), \
- FN(skc_lookup_tcp), \
- FN(tcp_check_syncookie),
-
-/* integer value in 'imm' field of BPF_CALL instruction selects which helper
- * function eBPF program intends to call
- */
-#define __BPF_ENUM_FN(x) BPF_FUNC_ ## x
-enum bpf_func_id {
- __BPF_FUNC_MAPPER(__BPF_ENUM_FN)
- __BPF_FUNC_MAX_ID,
-};
-#undef __BPF_ENUM_FN
-
-/* All flags used by eBPF helper functions, placed here. */
-
-/* BPF_FUNC_skb_store_bytes flags. */
-#define BPF_F_RECOMPUTE_CSUM (1ULL << 0)
-#define BPF_F_INVALIDATE_HASH (1ULL << 1)
-
-/* BPF_FUNC_l3_csum_replace and BPF_FUNC_l4_csum_replace flags.
- * First 4 bits are for passing the header field size.
- */
-#define BPF_F_HDR_FIELD_MASK 0xfULL
-
-/* BPF_FUNC_l4_csum_replace flags. */
-#define BPF_F_PSEUDO_HDR (1ULL << 4)
-#define BPF_F_MARK_MANGLED_0 (1ULL << 5)
-#define BPF_F_MARK_ENFORCE (1ULL << 6)
-
-/* BPF_FUNC_clone_redirect and BPF_FUNC_redirect flags. */
-#define BPF_F_INGRESS (1ULL << 0)
-
-/* BPF_FUNC_skb_set_tunnel_key and BPF_FUNC_skb_get_tunnel_key flags. */
-#define BPF_F_TUNINFO_IPV6 (1ULL << 0)
-
-/* flags for both BPF_FUNC_get_stackid and BPF_FUNC_get_stack. */
-#define BPF_F_SKIP_FIELD_MASK 0xffULL
-#define BPF_F_USER_STACK (1ULL << 8)
-/* flags used by BPF_FUNC_get_stackid only. */
-#define BPF_F_FAST_STACK_CMP (1ULL << 9)
-#define BPF_F_REUSE_STACKID (1ULL << 10)
-/* flags used by BPF_FUNC_get_stack only. */
-#define BPF_F_USER_BUILD_ID (1ULL << 11)
-
-/* BPF_FUNC_skb_set_tunnel_key flags. */
-#define BPF_F_ZERO_CSUM_TX (1ULL << 1)
-#define BPF_F_DONT_FRAGMENT (1ULL << 2)
-#define BPF_F_SEQ_NUMBER (1ULL << 3)
-
-/* BPF_FUNC_perf_event_output, BPF_FUNC_perf_event_read and
- * BPF_FUNC_perf_event_read_value flags.
- */
-#define BPF_F_INDEX_MASK 0xffffffffULL
-#define BPF_F_CURRENT_CPU BPF_F_INDEX_MASK
-/* BPF_FUNC_perf_event_output for sk_buff input context. */
-#define BPF_F_CTXLEN_MASK (0xfffffULL << 32)
-
-/* Current network namespace */
-#define BPF_F_CURRENT_NETNS (-1L)
-
-/* BPF_FUNC_skb_adjust_room flags. */
-#define BPF_F_ADJ_ROOM_FIXED_GSO (1ULL << 0)
-
-#define BPF_F_ADJ_ROOM_ENCAP_L3_IPV4 (1ULL << 1)
-#define BPF_F_ADJ_ROOM_ENCAP_L3_IPV6 (1ULL << 2)
-#define BPF_F_ADJ_ROOM_ENCAP_L4_GRE (1ULL << 3)
-#define BPF_F_ADJ_ROOM_ENCAP_L4_UDP (1ULL << 4)
-
-/* Mode for BPF_FUNC_skb_adjust_room helper. */
-enum bpf_adj_room_mode {
- BPF_ADJ_ROOM_NET,
- BPF_ADJ_ROOM_MAC,
-};
-
-/* Mode for BPF_FUNC_skb_load_bytes_relative helper. */
-enum bpf_hdr_start_off {
- BPF_HDR_START_MAC,
- BPF_HDR_START_NET,
-};
-
-/* Encapsulation type for BPF_FUNC_lwt_push_encap helper. */
-enum bpf_lwt_encap_mode {
- BPF_LWT_ENCAP_SEG6,
- BPF_LWT_ENCAP_SEG6_INLINE,
- BPF_LWT_ENCAP_IP,
-};
-
-#define __bpf_md_ptr(type, name) \
-union { \
- type name; \
- __u64 :64; \
-} __attribute__((aligned(8)))
-
-/* user accessible mirror of in-kernel sk_buff.
- * new fields can only be added to the end of this structure
- */
-struct __sk_buff {
- __u32 len;
- __u32 pkt_type;
- __u32 mark;
- __u32 queue_mapping;
- __u32 protocol;
- __u32 vlan_present;
- __u32 vlan_tci;
- __u32 vlan_proto;
- __u32 priority;
- __u32 ingress_ifindex;
- __u32 ifindex;
- __u32 tc_index;
- __u32 cb[5];
- __u32 hash;
- __u32 tc_classid;
- __u32 data;
- __u32 data_end;
- __u32 napi_id;
-
- /* Accessed by BPF_PROG_TYPE_sk_skb types from here to ... */
- __u32 family;
- __u32 remote_ip4; /* Stored in network byte order */
- __u32 local_ip4; /* Stored in network byte order */
- __u32 remote_ip6[4]; /* Stored in network byte order */
- __u32 local_ip6[4]; /* Stored in network byte order */
- __u32 remote_port; /* Stored in network byte order */
- __u32 local_port; /* stored in host byte order */
- /* ... here. */
-
- __u32 data_meta;
- __bpf_md_ptr(struct bpf_flow_keys *, flow_keys);
- __u64 tstamp;
- __u32 wire_len;
- __u32 gso_segs;
- __bpf_md_ptr(struct bpf_sock *, sk);
-};
-
-struct bpf_tunnel_key {
- __u32 tunnel_id;
- union {
- __u32 remote_ipv4;
- __u32 remote_ipv6[4];
- };
- __u8 tunnel_tos;
- __u8 tunnel_ttl;
- __u16 tunnel_ext; /* Padding, future use. */
- __u32 tunnel_label;
-};
-
-/* user accessible mirror of in-kernel xfrm_state.
- * new fields can only be added to the end of this structure
- */
-struct bpf_xfrm_state {
- __u32 reqid;
- __u32 spi; /* Stored in network byte order */
- __u16 family;
- __u16 ext; /* Padding, future use. */
- union {
- __u32 remote_ipv4; /* Stored in network byte order */
- __u32 remote_ipv6[4]; /* Stored in network byte order */
- };
-};
-
-/* Generic BPF return codes which all BPF program types may support.
- * The values are binary compatible with their TC_ACT_* counter-part to
- * provide backwards compatibility with existing SCHED_CLS and SCHED_ACT
- * programs.
- *
- * XDP is handled seprately, see XDP_*.
- */
-enum bpf_ret_code {
- BPF_OK = 0,
- /* 1 reserved */
- BPF_DROP = 2,
- /* 3-6 reserved */
- BPF_REDIRECT = 7,
- /* >127 are reserved for prog type specific return codes.
- *
- * BPF_LWT_REROUTE: used by BPF_PROG_TYPE_LWT_IN and
- * BPF_PROG_TYPE_LWT_XMIT to indicate that skb had been
- * changed and should be routed based on its new L3 header.
- * (This is an L3 redirect, as opposed to L2 redirect
- * represented by BPF_REDIRECT above).
- */
- BPF_LWT_REROUTE = 128,
-};
-
-struct bpf_sock {
- __u32 bound_dev_if;
- __u32 family;
- __u32 type;
- __u32 protocol;
- __u32 mark;
- __u32 priority;
- /* IP address also allows 1 and 2 bytes access */
- __u32 src_ip4;
- __u32 src_ip6[4];
- __u32 src_port; /* host byte order */
- __u32 dst_port; /* network byte order */
- __u32 dst_ip4;
- __u32 dst_ip6[4];
- __u32 state;
-};
-
-struct bpf_tcp_sock {
- __u32 snd_cwnd; /* Sending congestion window */
- __u32 srtt_us; /* smoothed round trip time << 3 in usecs */
- __u32 rtt_min;
- __u32 snd_ssthresh; /* Slow start size threshold */
- __u32 rcv_nxt; /* What we want to receive next */
- __u32 snd_nxt; /* Next sequence we send */
- __u32 snd_una; /* First byte we want an ack for */
- __u32 mss_cache; /* Cached effective mss, not including SACKS */
- __u32 ecn_flags; /* ECN status bits. */
- __u32 rate_delivered; /* saved rate sample: packets delivered */
- __u32 rate_interval_us; /* saved rate sample: time elapsed */
- __u32 packets_out; /* Packets which are "in flight" */
- __u32 retrans_out; /* Retransmitted packets out */
- __u32 total_retrans; /* Total retransmits for entire connection */
- __u32 segs_in; /* RFC4898 tcpEStatsPerfSegsIn
- * total number of segments in.
- */
- __u32 data_segs_in; /* RFC4898 tcpEStatsPerfDataSegsIn
- * total number of data segments in.
- */
- __u32 segs_out; /* RFC4898 tcpEStatsPerfSegsOut
- * The total number of segments sent.
- */
- __u32 data_segs_out; /* RFC4898 tcpEStatsPerfDataSegsOut
- * total number of data segments sent.
- */
- __u32 lost_out; /* Lost packets */
- __u32 sacked_out; /* SACK'd packets */
- __u64 bytes_received; /* RFC4898 tcpEStatsAppHCThruOctetsReceived
- * sum(delta(rcv_nxt)), or how many bytes
- * were acked.
- */
- __u64 bytes_acked; /* RFC4898 tcpEStatsAppHCThruOctetsAcked
- * sum(delta(snd_una)), or how many bytes
- * were acked.
- */
-};
-
-struct bpf_sock_tuple {
- union {
- struct {
- __be32 saddr;
- __be32 daddr;
- __be16 sport;
- __be16 dport;
- } ipv4;
- struct {
- __be32 saddr[4];
- __be32 daddr[4];
- __be16 sport;
- __be16 dport;
- } ipv6;
- };
-};
-
-#define XDP_PACKET_HEADROOM 256
-
-/* User return codes for XDP prog type.
- * A valid XDP program must return one of these defined values. All other
- * return codes are reserved for future use. Unknown return codes will
- * result in packet drops and a warning via bpf_warn_invalid_xdp_action().
- */
-enum xdp_action {
- XDP_ABORTED = 0,
- XDP_DROP,
- XDP_PASS,
- XDP_TX,
- XDP_REDIRECT,
-};
-
-/* user accessible metadata for XDP packet hook
- * new fields must be added to the end of this structure
- */
-struct xdp_md {
- __u32 data;
- __u32 data_end;
- __u32 data_meta;
- /* Below access go through struct xdp_rxq_info */
- __u32 ingress_ifindex; /* rxq->dev->ifindex */
- __u32 rx_queue_index; /* rxq->queue_index */
-};
-
-enum sk_action {
- SK_DROP = 0,
- SK_PASS,
-};
-
-/* user accessible metadata for SK_MSG packet hook, new fields must
- * be added to the end of this structure
- */
-struct sk_msg_md {
- __bpf_md_ptr(void *, data);
- __bpf_md_ptr(void *, data_end);
-
- __u32 family;
- __u32 remote_ip4; /* Stored in network byte order */
- __u32 local_ip4; /* Stored in network byte order */
- __u32 remote_ip6[4]; /* Stored in network byte order */
- __u32 local_ip6[4]; /* Stored in network byte order */
- __u32 remote_port; /* Stored in network byte order */
- __u32 local_port; /* stored in host byte order */
- __u32 size; /* Total size of sk_msg */
-};
-
-struct sk_reuseport_md {
- /*
- * Start of directly accessible data. It begins from
- * the tcp/udp header.
- */
- __bpf_md_ptr(void *, data);
- /* End of directly accessible data */
- __bpf_md_ptr(void *, data_end);
- /*
- * Total length of packet (starting from the tcp/udp header).
- * Note that the directly accessible bytes (data_end - data)
- * could be less than this "len". Those bytes could be
- * indirectly read by a helper "bpf_skb_load_bytes()".
- */
- __u32 len;
- /*
- * Eth protocol in the mac header (network byte order). e.g.
- * ETH_P_IP(0x0800) and ETH_P_IPV6(0x86DD)
- */
- __u32 eth_protocol;
- __u32 ip_protocol; /* IP protocol. e.g. IPPROTO_TCP, IPPROTO_UDP */
- __u32 bind_inany; /* Is sock bound to an INANY address? */
- __u32 hash; /* A hash of the packet 4 tuples */
-};
-
-#define BPF_TAG_SIZE 8
-
-struct bpf_prog_info {
- __u32 type;
- __u32 id;
- __u8 tag[BPF_TAG_SIZE];
- __u32 jited_prog_len;
- __u32 xlated_prog_len;
- __aligned_u64 jited_prog_insns;
- __aligned_u64 xlated_prog_insns;
- __u64 load_time; /* ns since boottime */
- __u32 created_by_uid;
- __u32 nr_map_ids;
- __aligned_u64 map_ids;
- char name[BPF_OBJ_NAME_LEN];
- __u32 ifindex;
- __u32 gpl_compatible:1;
- __u64 netns_dev;
- __u64 netns_ino;
- __u32 nr_jited_ksyms;
- __u32 nr_jited_func_lens;
- __aligned_u64 jited_ksyms;
- __aligned_u64 jited_func_lens;
- __u32 btf_id;
- __u32 func_info_rec_size;
- __aligned_u64 func_info;
- __u32 nr_func_info;
- __u32 nr_line_info;
- __aligned_u64 line_info;
- __aligned_u64 jited_line_info;
- __u32 nr_jited_line_info;
- __u32 line_info_rec_size;
- __u32 jited_line_info_rec_size;
- __u32 nr_prog_tags;
- __aligned_u64 prog_tags;
- __u64 run_time_ns;
- __u64 run_cnt;
-} __attribute__((aligned(8)));
-
-struct bpf_map_info {
- __u32 type;
- __u32 id;
- __u32 key_size;
- __u32 value_size;
- __u32 max_entries;
- __u32 map_flags;
- char name[BPF_OBJ_NAME_LEN];
- __u32 ifindex;
- __u32 :32;
- __u64 netns_dev;
- __u64 netns_ino;
- __u32 btf_id;
- __u32 btf_key_type_id;
- __u32 btf_value_type_id;
-} __attribute__((aligned(8)));
-
-struct bpf_btf_info {
- __aligned_u64 btf;
- __u32 btf_size;
- __u32 id;
-} __attribute__((aligned(8)));
-
-/* User bpf_sock_addr struct to access socket fields and sockaddr struct passed
- * by user and intended to be used by socket (e.g. to bind to, depends on
- * attach attach type).
- */
-struct bpf_sock_addr {
- __u32 user_family; /* Allows 4-byte read, but no write. */
- __u32 user_ip4; /* Allows 1,2,4-byte read and 4-byte write.
- * Stored in network byte order.
- */
- __u32 user_ip6[4]; /* Allows 1,2,4-byte read an 4-byte write.
- * Stored in network byte order.
- */
- __u32 user_port; /* Allows 4-byte read and write.
- * Stored in network byte order
- */
- __u32 family; /* Allows 4-byte read, but no write */
- __u32 type; /* Allows 4-byte read, but no write */
- __u32 protocol; /* Allows 4-byte read, but no write */
- __u32 msg_src_ip4; /* Allows 1,2,4-byte read an 4-byte write.
- * Stored in network byte order.
- */
- __u32 msg_src_ip6[4]; /* Allows 1,2,4-byte read an 4-byte write.
- * Stored in network byte order.
- */
-};
-
-/* User bpf_sock_ops struct to access socket values and specify request ops
- * and their replies.
- * Some of this fields are in network (bigendian) byte order and may need
- * to be converted before use (bpf_ntohl() defined in samples/bpf/bpf_endian.h).
- * New fields can only be added at the end of this structure
- */
-struct bpf_sock_ops {
- __u32 op;
- union {
- __u32 args[4]; /* Optionally passed to bpf program */
- __u32 reply; /* Returned by bpf program */
- __u32 replylong[4]; /* Optionally returned by bpf prog */
- };
- __u32 family;
- __u32 remote_ip4; /* Stored in network byte order */
- __u32 local_ip4; /* Stored in network byte order */
- __u32 remote_ip6[4]; /* Stored in network byte order */
- __u32 local_ip6[4]; /* Stored in network byte order */
- __u32 remote_port; /* Stored in network byte order */
- __u32 local_port; /* stored in host byte order */
- __u32 is_fullsock; /* Some TCP fields are only valid if
- * there is a full socket. If not, the
- * fields read as zero.
- */
- __u32 snd_cwnd;
- __u32 srtt_us; /* Averaged RTT << 3 in usecs */
- __u32 bpf_sock_ops_cb_flags; /* flags defined in uapi/linux/tcp.h */
- __u32 state;
- __u32 rtt_min;
- __u32 snd_ssthresh;
- __u32 rcv_nxt;
- __u32 snd_nxt;
- __u32 snd_una;
- __u32 mss_cache;
- __u32 ecn_flags;
- __u32 rate_delivered;
- __u32 rate_interval_us;
- __u32 packets_out;
- __u32 retrans_out;
- __u32 total_retrans;
- __u32 segs_in;
- __u32 data_segs_in;
- __u32 segs_out;
- __u32 data_segs_out;
- __u32 lost_out;
- __u32 sacked_out;
- __u32 sk_txhash;
- __u64 bytes_received;
- __u64 bytes_acked;
-};
-
-/* Definitions for bpf_sock_ops_cb_flags */
-#define BPF_SOCK_OPS_RTO_CB_FLAG (1<<0)
-#define BPF_SOCK_OPS_RETRANS_CB_FLAG (1<<1)
-#define BPF_SOCK_OPS_STATE_CB_FLAG (1<<2)
-#define BPF_SOCK_OPS_ALL_CB_FLAGS 0x7 /* Mask of all currently
- * supported cb flags
- */
-
-/* List of known BPF sock_ops operators.
- * New entries can only be added at the end
- */
-enum {
- BPF_SOCK_OPS_VOID,
- BPF_SOCK_OPS_TIMEOUT_INIT, /* Should return SYN-RTO value to use or
- * -1 if default value should be used
- */
- BPF_SOCK_OPS_RWND_INIT, /* Should return initial advertized
- * window (in packets) or -1 if default
- * value should be used
- */
- BPF_SOCK_OPS_TCP_CONNECT_CB, /* Calls BPF program right before an
- * active connection is initialized
- */
- BPF_SOCK_OPS_ACTIVE_ESTABLISHED_CB, /* Calls BPF program when an
- * active connection is
- * established
- */
- BPF_SOCK_OPS_PASSIVE_ESTABLISHED_CB, /* Calls BPF program when a
- * passive connection is
- * established
- */
- BPF_SOCK_OPS_NEEDS_ECN, /* If connection's congestion control
- * needs ECN
- */
- BPF_SOCK_OPS_BASE_RTT, /* Get base RTT. The correct value is
- * based on the path and may be
- * dependent on the congestion control
- * algorithm. In general it indicates
- * a congestion threshold. RTTs above
- * this indicate congestion
- */
- BPF_SOCK_OPS_RTO_CB, /* Called when an RTO has triggered.
- * Arg1: value of icsk_retransmits
- * Arg2: value of icsk_rto
- * Arg3: whether RTO has expired
- */
- BPF_SOCK_OPS_RETRANS_CB, /* Called when skb is retransmitted.
- * Arg1: sequence number of 1st byte
- * Arg2: # segments
- * Arg3: return value of
- * tcp_transmit_skb (0 => success)
- */
- BPF_SOCK_OPS_STATE_CB, /* Called when TCP changes state.
- * Arg1: old_state
- * Arg2: new_state
- */
- BPF_SOCK_OPS_TCP_LISTEN_CB, /* Called on listen(2), right after
- * socket transition to LISTEN state.
- */
-};
-
-/* List of TCP states. There is a build check in net/ipv4/tcp.c to detect
- * changes between the TCP and BPF versions. Ideally this should never happen.
- * If it does, we need to add code to convert them before calling
- * the BPF sock_ops function.
- */
-enum {
- BPF_TCP_ESTABLISHED = 1,
- BPF_TCP_SYN_SENT,
- BPF_TCP_SYN_RECV,
- BPF_TCP_FIN_WAIT1,
- BPF_TCP_FIN_WAIT2,
- BPF_TCP_TIME_WAIT,
- BPF_TCP_CLOSE,
- BPF_TCP_CLOSE_WAIT,
- BPF_TCP_LAST_ACK,
- BPF_TCP_LISTEN,
- BPF_TCP_CLOSING, /* Now a valid state */
- BPF_TCP_NEW_SYN_RECV,
-
- BPF_TCP_MAX_STATES /* Leave at the end! */
-};
-
-#define TCP_BPF_IW 1001 /* Set TCP initial congestion window */
-#define TCP_BPF_SNDCWND_CLAMP 1002 /* Set sndcwnd_clamp */
-
-struct bpf_perf_event_value {
- __u64 counter;
- __u64 enabled;
- __u64 running;
-};
-
-#define BPF_DEVCG_ACC_MKNOD (1ULL << 0)
-#define BPF_DEVCG_ACC_READ (1ULL << 1)
-#define BPF_DEVCG_ACC_WRITE (1ULL << 2)
-
-#define BPF_DEVCG_DEV_BLOCK (1ULL << 0)
-#define BPF_DEVCG_DEV_CHAR (1ULL << 1)
-
-struct bpf_cgroup_dev_ctx {
- /* access_type encoded as (BPF_DEVCG_ACC_* << 16) | BPF_DEVCG_DEV_* */
- __u32 access_type;
- __u32 major;
- __u32 minor;
-};
-
-struct bpf_raw_tracepoint_args {
- __u64 args[0];
-};
-
-/* DIRECT: Skip the FIB rules and go to FIB table associated with device
- * OUTPUT: Do lookup from egress perspective; default is ingress
- */
-#define BPF_FIB_LOOKUP_DIRECT BIT(0)
-#define BPF_FIB_LOOKUP_OUTPUT BIT(1)
-
-enum {
- BPF_FIB_LKUP_RET_SUCCESS, /* lookup successful */
- BPF_FIB_LKUP_RET_BLACKHOLE, /* dest is blackholed; can be dropped */
- BPF_FIB_LKUP_RET_UNREACHABLE, /* dest is unreachable; can be dropped */
- BPF_FIB_LKUP_RET_PROHIBIT, /* dest not allowed; can be dropped */
- BPF_FIB_LKUP_RET_NOT_FWDED, /* packet is not forwarded */
- BPF_FIB_LKUP_RET_FWD_DISABLED, /* fwding is not enabled on ingress */
- BPF_FIB_LKUP_RET_UNSUPP_LWT, /* fwd requires encapsulation */
- BPF_FIB_LKUP_RET_NO_NEIGH, /* no neighbor entry for nh */
- BPF_FIB_LKUP_RET_FRAG_NEEDED, /* fragmentation required to fwd */
-};
-
-struct bpf_fib_lookup {
- /* input: network family for lookup (AF_INET, AF_INET6)
- * output: network family of egress nexthop
- */
- __u8 family;
-
- /* set if lookup is to consider L4 data - e.g., FIB rules */
- __u8 l4_protocol;
- __be16 sport;
- __be16 dport;
-
- /* total length of packet from network header - used for MTU check */
- __u16 tot_len;
-
- /* input: L3 device index for lookup
- * output: device index from FIB lookup
- */
- __u32 ifindex;
-
- union {
- /* inputs to lookup */
- __u8 tos; /* AF_INET */
- __be32 flowinfo; /* AF_INET6, flow_label + priority */
-
- /* output: metric of fib result (IPv4/IPv6 only) */
- __u32 rt_metric;
- };
-
- union {
- __be32 ipv4_src;
- __u32 ipv6_src[4]; /* in6_addr; network order */
- };
-
- /* input to bpf_fib_lookup, ipv{4,6}_dst is destination address in
- * network header. output: bpf_fib_lookup sets to gateway address
- * if FIB lookup returns gateway route
- */
- union {
- __be32 ipv4_dst;
- __u32 ipv6_dst[4]; /* in6_addr; network order */
- };
-
- /* output */
- __be16 h_vlan_proto;
- __be16 h_vlan_TCI;
- __u8 smac[6]; /* ETH_ALEN */
- __u8 dmac[6]; /* ETH_ALEN */
-};
-
-enum bpf_task_fd_type {
- BPF_FD_TYPE_RAW_TRACEPOINT, /* tp name */
- BPF_FD_TYPE_TRACEPOINT, /* tp name */
- BPF_FD_TYPE_KPROBE, /* (symbol + offset) or addr */
- BPF_FD_TYPE_KRETPROBE, /* (symbol + offset) or addr */
- BPF_FD_TYPE_UPROBE, /* filename + offset */
- BPF_FD_TYPE_URETPROBE, /* filename + offset */
-};
-
-struct bpf_flow_keys {
- __u16 nhoff;
- __u16 thoff;
- __u16 addr_proto; /* ETH_P_* of valid addrs */
- __u8 is_frag;
- __u8 is_first_frag;
- __u8 is_encap;
- __u8 ip_proto;
- __be16 n_proto;
- __be16 sport;
- __be16 dport;
- union {
- struct {
- __be32 ipv4_src;
- __be32 ipv4_dst;
- };
- struct {
- __u32 ipv6_src[4]; /* in6_addr; network order */
- __u32 ipv6_dst[4]; /* in6_addr; network order */
- };
- };
-};
-
-struct bpf_func_info {
- __u32 insn_off;
- __u32 type_id;
-};
-
-#define BPF_LINE_INFO_LINE_NUM(line_col) ((line_col) >> 10)
-#define BPF_LINE_INFO_LINE_COL(line_col) ((line_col) & 0x3ff)
-
-struct bpf_line_info {
- __u32 insn_off;
- __u32 file_name_off;
- __u32 line_off;
- __u32 line_col;
-};
-
-struct bpf_spin_lock {
- __u32 val;
-};
-#endif /* _UAPI__LINUX_BPF_H__ */
diff --git a/src/xdp/include/linux/err.h b/src/xdp/include/linux/err.h
deleted file mode 100644
index a3db4cf5e..000000000
--- a/src/xdp/include/linux/err.h
+++ /dev/null
@@ -1,33 +0,0 @@
-/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
-
-#ifndef __LINUX_ERR_H
-#define __LINUX_ERR_H
-
-#include <linux/types.h>
-#include <asm/errno.h>
-
-#define MAX_ERRNO 4095
-
-#define IS_ERR_VALUE(x) ((x) >= (unsigned long)-MAX_ERRNO)
-
-static inline void * ERR_PTR(long error_)
-{
- return (void *) error_;
-}
-
-static inline long PTR_ERR(const void *ptr)
-{
- return (long) ptr;
-}
-
-static inline bool IS_ERR(const void *ptr)
-{
- return IS_ERR_VALUE((unsigned long)ptr);
-}
-
-static inline bool IS_ERR_OR_NULL(const void *ptr)
-{
- return (!ptr) || IS_ERR_VALUE((unsigned long)ptr);
-}
-
-#endif
diff --git a/src/xdp/include/linux/if_link.h b/src/xdp/include/linux/if_link.h
deleted file mode 100644
index 5b225ff63..000000000
--- a/src/xdp/include/linux/if_link.h
+++ /dev/null
@@ -1,1025 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-#ifndef _UAPI_LINUX_IF_LINK_H
-#define _UAPI_LINUX_IF_LINK_H
-
-#include <linux/types.h>
-#include <linux/netlink.h>
-
-/* This struct should be in sync with struct rtnl_link_stats64 */
-struct rtnl_link_stats {
- __u32 rx_packets; /* total packets received */
- __u32 tx_packets; /* total packets transmitted */
- __u32 rx_bytes; /* total bytes received */
- __u32 tx_bytes; /* total bytes transmitted */
- __u32 rx_errors; /* bad packets received */
- __u32 tx_errors; /* packet transmit problems */
- __u32 rx_dropped; /* no space in linux buffers */
- __u32 tx_dropped; /* no space available in linux */
- __u32 multicast; /* multicast packets received */
- __u32 collisions;
-
- /* detailed rx_errors: */
- __u32 rx_length_errors;
- __u32 rx_over_errors; /* receiver ring buff overflow */
- __u32 rx_crc_errors; /* recved pkt with crc error */
- __u32 rx_frame_errors; /* recv'd frame alignment error */
- __u32 rx_fifo_errors; /* recv'r fifo overrun */
- __u32 rx_missed_errors; /* receiver missed packet */
-
- /* detailed tx_errors */
- __u32 tx_aborted_errors;
- __u32 tx_carrier_errors;
- __u32 tx_fifo_errors;
- __u32 tx_heartbeat_errors;
- __u32 tx_window_errors;
-
- /* for cslip etc */
- __u32 rx_compressed;
- __u32 tx_compressed;
-
- __u32 rx_nohandler; /* dropped, no handler found */
-};
-
-/* The main device statistics structure */
-struct rtnl_link_stats64 {
- __u64 rx_packets; /* total packets received */
- __u64 tx_packets; /* total packets transmitted */
- __u64 rx_bytes; /* total bytes received */
- __u64 tx_bytes; /* total bytes transmitted */
- __u64 rx_errors; /* bad packets received */
- __u64 tx_errors; /* packet transmit problems */
- __u64 rx_dropped; /* no space in linux buffers */
- __u64 tx_dropped; /* no space available in linux */
- __u64 multicast; /* multicast packets received */
- __u64 collisions;
-
- /* detailed rx_errors: */
- __u64 rx_length_errors;
- __u64 rx_over_errors; /* receiver ring buff overflow */
- __u64 rx_crc_errors; /* recved pkt with crc error */
- __u64 rx_frame_errors; /* recv'd frame alignment error */
- __u64 rx_fifo_errors; /* recv'r fifo overrun */
- __u64 rx_missed_errors; /* receiver missed packet */
-
- /* detailed tx_errors */
- __u64 tx_aborted_errors;
- __u64 tx_carrier_errors;
- __u64 tx_fifo_errors;
- __u64 tx_heartbeat_errors;
- __u64 tx_window_errors;
-
- /* for cslip etc */
- __u64 rx_compressed;
- __u64 tx_compressed;
-
- __u64 rx_nohandler; /* dropped, no handler found */
-};
-
-/* The struct should be in sync with struct ifmap */
-struct rtnl_link_ifmap {
- __u64 mem_start;
- __u64 mem_end;
- __u64 base_addr;
- __u16 irq;
- __u8 dma;
- __u8 port;
-};
-
-/*
- * IFLA_AF_SPEC
- * Contains nested attributes for address family specific attributes.
- * Each address family may create a attribute with the address family
- * number as type and create its own attribute structure in it.
- *
- * Example:
- * [IFLA_AF_SPEC] = {
- * [AF_INET] = {
- * [IFLA_INET_CONF] = ...,
- * },
- * [AF_INET6] = {
- * [IFLA_INET6_FLAGS] = ...,
- * [IFLA_INET6_CONF] = ...,
- * }
- * }
- */
-
-enum {
- IFLA_UNSPEC,
- IFLA_ADDRESS,
- IFLA_BROADCAST,
- IFLA_IFNAME,
- IFLA_MTU,
- IFLA_LINK,
- IFLA_QDISC,
- IFLA_STATS,
- IFLA_COST,
-#define IFLA_COST IFLA_COST
- IFLA_PRIORITY,
-#define IFLA_PRIORITY IFLA_PRIORITY
- IFLA_MASTER,
-#define IFLA_MASTER IFLA_MASTER
- IFLA_WIRELESS, /* Wireless Extension event - see wireless.h */
-#define IFLA_WIRELESS IFLA_WIRELESS
- IFLA_PROTINFO, /* Protocol specific information for a link */
-#define IFLA_PROTINFO IFLA_PROTINFO
- IFLA_TXQLEN,
-#define IFLA_TXQLEN IFLA_TXQLEN
- IFLA_MAP,
-#define IFLA_MAP IFLA_MAP
- IFLA_WEIGHT,
-#define IFLA_WEIGHT IFLA_WEIGHT
- IFLA_OPERSTATE,
- IFLA_LINKMODE,
- IFLA_LINKINFO,
-#define IFLA_LINKINFO IFLA_LINKINFO
- IFLA_NET_NS_PID,
- IFLA_IFALIAS,
- IFLA_NUM_VF, /* Number of VFs if device is SR-IOV PF */
- IFLA_VFINFO_LIST,
- IFLA_STATS64,
- IFLA_VF_PORTS,
- IFLA_PORT_SELF,
- IFLA_AF_SPEC,
- IFLA_GROUP, /* Group the device belongs to */
- IFLA_NET_NS_FD,
- IFLA_EXT_MASK, /* Extended info mask, VFs, etc */
- IFLA_PROMISCUITY, /* Promiscuity count: > 0 means acts PROMISC */
-#define IFLA_PROMISCUITY IFLA_PROMISCUITY
- IFLA_NUM_TX_QUEUES,
- IFLA_NUM_RX_QUEUES,
- IFLA_CARRIER,
- IFLA_PHYS_PORT_ID,
- IFLA_CARRIER_CHANGES,
- IFLA_PHYS_SWITCH_ID,
- IFLA_LINK_NETNSID,
- IFLA_PHYS_PORT_NAME,
- IFLA_PROTO_DOWN,
- IFLA_GSO_MAX_SEGS,
- IFLA_GSO_MAX_SIZE,
- IFLA_PAD,
- IFLA_XDP,
- IFLA_EVENT,
- IFLA_NEW_NETNSID,
- IFLA_IF_NETNSID,
- IFLA_TARGET_NETNSID = IFLA_IF_NETNSID, /* new alias */
- IFLA_CARRIER_UP_COUNT,
- IFLA_CARRIER_DOWN_COUNT,
- IFLA_NEW_IFINDEX,
- IFLA_MIN_MTU,
- IFLA_MAX_MTU,
- __IFLA_MAX
-};
-
-
-#define IFLA_MAX (__IFLA_MAX - 1)
-
-/* backwards compatibility for userspace */
-#ifndef __KERNEL__
-#define IFLA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifinfomsg))))
-#define IFLA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifinfomsg))
-#endif
-
-enum {
- IFLA_INET_UNSPEC,
- IFLA_INET_CONF,
- __IFLA_INET_MAX,
-};
-
-#define IFLA_INET_MAX (__IFLA_INET_MAX - 1)
-
-/* ifi_flags.
-
- IFF_* flags.
-
- The only change is:
- IFF_LOOPBACK, IFF_BROADCAST and IFF_POINTOPOINT are
- more not changeable by user. They describe link media
- characteristics and set by device driver.
-
- Comments:
- - Combination IFF_BROADCAST|IFF_POINTOPOINT is invalid
- - If neither of these three flags are set;
- the interface is NBMA.
-
- - IFF_MULTICAST does not mean anything special:
- multicasts can be used on all not-NBMA links.
- IFF_MULTICAST means that this media uses special encapsulation
- for multicast frames. Apparently, all IFF_POINTOPOINT and
- IFF_BROADCAST devices are able to use multicasts too.
- */
-
-/* IFLA_LINK.
- For usual devices it is equal ifi_index.
- If it is a "virtual interface" (f.e. tunnel), ifi_link
- can point to real physical interface (f.e. for bandwidth calculations),
- or maybe 0, what means, that real media is unknown (usual
- for IPIP tunnels, when route to endpoint is allowed to change)
- */
-
-/* Subtype attributes for IFLA_PROTINFO */
-enum {
- IFLA_INET6_UNSPEC,
- IFLA_INET6_FLAGS, /* link flags */
- IFLA_INET6_CONF, /* sysctl parameters */
- IFLA_INET6_STATS, /* statistics */
- IFLA_INET6_MCAST, /* MC things. What of them? */
- IFLA_INET6_CACHEINFO, /* time values and max reasm size */
- IFLA_INET6_ICMP6STATS, /* statistics (icmpv6) */
- IFLA_INET6_TOKEN, /* device token */
- IFLA_INET6_ADDR_GEN_MODE, /* implicit address generator mode */
- __IFLA_INET6_MAX
-};
-
-#define IFLA_INET6_MAX (__IFLA_INET6_MAX - 1)
-
-enum in6_addr_gen_mode {
- IN6_ADDR_GEN_MODE_EUI64,
- IN6_ADDR_GEN_MODE_NONE,
- IN6_ADDR_GEN_MODE_STABLE_PRIVACY,
- IN6_ADDR_GEN_MODE_RANDOM,
-};
-
-/* Bridge section */
-
-enum {
- IFLA_BR_UNSPEC,
- IFLA_BR_FORWARD_DELAY,
- IFLA_BR_HELLO_TIME,
- IFLA_BR_MAX_AGE,
- IFLA_BR_AGEING_TIME,
- IFLA_BR_STP_STATE,
- IFLA_BR_PRIORITY,
- IFLA_BR_VLAN_FILTERING,
- IFLA_BR_VLAN_PROTOCOL,
- IFLA_BR_GROUP_FWD_MASK,
- IFLA_BR_ROOT_ID,
- IFLA_BR_BRIDGE_ID,
- IFLA_BR_ROOT_PORT,
- IFLA_BR_ROOT_PATH_COST,
- IFLA_BR_TOPOLOGY_CHANGE,
- IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
- IFLA_BR_HELLO_TIMER,
- IFLA_BR_TCN_TIMER,
- IFLA_BR_TOPOLOGY_CHANGE_TIMER,
- IFLA_BR_GC_TIMER,
- IFLA_BR_GROUP_ADDR,
- IFLA_BR_FDB_FLUSH,
- IFLA_BR_MCAST_ROUTER,
- IFLA_BR_MCAST_SNOOPING,
- IFLA_BR_MCAST_QUERY_USE_IFADDR,
- IFLA_BR_MCAST_QUERIER,
- IFLA_BR_MCAST_HASH_ELASTICITY,
- IFLA_BR_MCAST_HASH_MAX,
- IFLA_BR_MCAST_LAST_MEMBER_CNT,
- IFLA_BR_MCAST_STARTUP_QUERY_CNT,
- IFLA_BR_MCAST_LAST_MEMBER_INTVL,
- IFLA_BR_MCAST_MEMBERSHIP_INTVL,
- IFLA_BR_MCAST_QUERIER_INTVL,
- IFLA_BR_MCAST_QUERY_INTVL,
- IFLA_BR_MCAST_QUERY_RESPONSE_INTVL,
- IFLA_BR_MCAST_STARTUP_QUERY_INTVL,
- IFLA_BR_NF_CALL_IPTABLES,
- IFLA_BR_NF_CALL_IP6TABLES,
- IFLA_BR_NF_CALL_ARPTABLES,
- IFLA_BR_VLAN_DEFAULT_PVID,
- IFLA_BR_PAD,
- IFLA_BR_VLAN_STATS_ENABLED,
- IFLA_BR_MCAST_STATS_ENABLED,
- IFLA_BR_MCAST_IGMP_VERSION,
- IFLA_BR_MCAST_MLD_VERSION,
- IFLA_BR_VLAN_STATS_PER_PORT,
- IFLA_BR_MULTI_BOOLOPT,
- __IFLA_BR_MAX,
-};
-
-#define IFLA_BR_MAX (__IFLA_BR_MAX - 1)
-
-struct ifla_bridge_id {
- __u8 prio[2];
- __u8 addr[6]; /* ETH_ALEN */
-};
-
-enum {
- BRIDGE_MODE_UNSPEC,
- BRIDGE_MODE_HAIRPIN,
-};
-
-enum {
- IFLA_BRPORT_UNSPEC,
- IFLA_BRPORT_STATE, /* Spanning tree state */
- IFLA_BRPORT_PRIORITY, /* " priority */
- IFLA_BRPORT_COST, /* " cost */
- IFLA_BRPORT_MODE, /* mode (hairpin) */
- IFLA_BRPORT_GUARD, /* bpdu guard */
- IFLA_BRPORT_PROTECT, /* root port protection */
- IFLA_BRPORT_FAST_LEAVE, /* multicast fast leave */
- IFLA_BRPORT_LEARNING, /* mac learning */
- IFLA_BRPORT_UNICAST_FLOOD, /* flood unicast traffic */
- IFLA_BRPORT_PROXYARP, /* proxy ARP */
- IFLA_BRPORT_LEARNING_SYNC, /* mac learning sync from device */
- IFLA_BRPORT_PROXYARP_WIFI, /* proxy ARP for Wi-Fi */
- IFLA_BRPORT_ROOT_ID, /* designated root */
- IFLA_BRPORT_BRIDGE_ID, /* designated bridge */
- IFLA_BRPORT_DESIGNATED_PORT,
- IFLA_BRPORT_DESIGNATED_COST,
- IFLA_BRPORT_ID,
- IFLA_BRPORT_NO,
- IFLA_BRPORT_TOPOLOGY_CHANGE_ACK,
- IFLA_BRPORT_CONFIG_PENDING,
- IFLA_BRPORT_MESSAGE_AGE_TIMER,
- IFLA_BRPORT_FORWARD_DELAY_TIMER,
- IFLA_BRPORT_HOLD_TIMER,
- IFLA_BRPORT_FLUSH,
- IFLA_BRPORT_MULTICAST_ROUTER,
- IFLA_BRPORT_PAD,
- IFLA_BRPORT_MCAST_FLOOD,
- IFLA_BRPORT_MCAST_TO_UCAST,
- IFLA_BRPORT_VLAN_TUNNEL,
- IFLA_BRPORT_BCAST_FLOOD,
- IFLA_BRPORT_GROUP_FWD_MASK,
- IFLA_BRPORT_NEIGH_SUPPRESS,
- IFLA_BRPORT_ISOLATED,
- IFLA_BRPORT_BACKUP_PORT,
- __IFLA_BRPORT_MAX
-};
-#define IFLA_BRPORT_MAX (__IFLA_BRPORT_MAX - 1)
-
-struct ifla_cacheinfo {
- __u32 max_reasm_len;
- __u32 tstamp; /* ipv6InterfaceTable updated timestamp */
- __u32 reachable_time;
- __u32 retrans_time;
-};
-
-enum {
- IFLA_INFO_UNSPEC,
- IFLA_INFO_KIND,
- IFLA_INFO_DATA,
- IFLA_INFO_XSTATS,
- IFLA_INFO_SLAVE_KIND,
- IFLA_INFO_SLAVE_DATA,
- __IFLA_INFO_MAX,
-};
-
-#define IFLA_INFO_MAX (__IFLA_INFO_MAX - 1)
-
-/* VLAN section */
-
-enum {
- IFLA_VLAN_UNSPEC,
- IFLA_VLAN_ID,
- IFLA_VLAN_FLAGS,
- IFLA_VLAN_EGRESS_QOS,
- IFLA_VLAN_INGRESS_QOS,
- IFLA_VLAN_PROTOCOL,
- __IFLA_VLAN_MAX,
-};
-
-#define IFLA_VLAN_MAX (__IFLA_VLAN_MAX - 1)
-
-struct ifla_vlan_flags {
- __u32 flags;
- __u32 mask;
-};
-
-enum {
- IFLA_VLAN_QOS_UNSPEC,
- IFLA_VLAN_QOS_MAPPING,
- __IFLA_VLAN_QOS_MAX
-};
-
-#define IFLA_VLAN_QOS_MAX (__IFLA_VLAN_QOS_MAX - 1)
-
-struct ifla_vlan_qos_mapping {
- __u32 from;
- __u32 to;
-};
-
-/* MACVLAN section */
-enum {
- IFLA_MACVLAN_UNSPEC,
- IFLA_MACVLAN_MODE,
- IFLA_MACVLAN_FLAGS,
- IFLA_MACVLAN_MACADDR_MODE,
- IFLA_MACVLAN_MACADDR,
- IFLA_MACVLAN_MACADDR_DATA,
- IFLA_MACVLAN_MACADDR_COUNT,
- __IFLA_MACVLAN_MAX,
-};
-
-#define IFLA_MACVLAN_MAX (__IFLA_MACVLAN_MAX - 1)
-
-enum macvlan_mode {
- MACVLAN_MODE_PRIVATE = 1, /* don't talk to other macvlans */
- MACVLAN_MODE_VEPA = 2, /* talk to other ports through ext bridge */
- MACVLAN_MODE_BRIDGE = 4, /* talk to bridge ports directly */
- MACVLAN_MODE_PASSTHRU = 8,/* take over the underlying device */
- MACVLAN_MODE_SOURCE = 16,/* use source MAC address list to assign */
-};
-
-enum macvlan_macaddr_mode {
- MACVLAN_MACADDR_ADD,
- MACVLAN_MACADDR_DEL,
- MACVLAN_MACADDR_FLUSH,
- MACVLAN_MACADDR_SET,
-};
-
-#define MACVLAN_FLAG_NOPROMISC 1
-
-/* VRF section */
-enum {
- IFLA_VRF_UNSPEC,
- IFLA_VRF_TABLE,
- __IFLA_VRF_MAX
-};
-
-#define IFLA_VRF_MAX (__IFLA_VRF_MAX - 1)
-
-enum {
- IFLA_VRF_PORT_UNSPEC,
- IFLA_VRF_PORT_TABLE,
- __IFLA_VRF_PORT_MAX
-};
-
-#define IFLA_VRF_PORT_MAX (__IFLA_VRF_PORT_MAX - 1)
-
-/* MACSEC section */
-enum {
- IFLA_MACSEC_UNSPEC,
- IFLA_MACSEC_SCI,
- IFLA_MACSEC_PORT,
- IFLA_MACSEC_ICV_LEN,
- IFLA_MACSEC_CIPHER_SUITE,
- IFLA_MACSEC_WINDOW,
- IFLA_MACSEC_ENCODING_SA,
- IFLA_MACSEC_ENCRYPT,
- IFLA_MACSEC_PROTECT,
- IFLA_MACSEC_INC_SCI,
- IFLA_MACSEC_ES,
- IFLA_MACSEC_SCB,
- IFLA_MACSEC_REPLAY_PROTECT,
- IFLA_MACSEC_VALIDATION,
- IFLA_MACSEC_PAD,
- __IFLA_MACSEC_MAX,
-};
-
-#define IFLA_MACSEC_MAX (__IFLA_MACSEC_MAX - 1)
-
-/* XFRM section */
-enum {
- IFLA_XFRM_UNSPEC,
- IFLA_XFRM_LINK,
- IFLA_XFRM_IF_ID,
- __IFLA_XFRM_MAX
-};
-
-#define IFLA_XFRM_MAX (__IFLA_XFRM_MAX - 1)
-
-enum macsec_validation_type {
- MACSEC_VALIDATE_DISABLED = 0,
- MACSEC_VALIDATE_CHECK = 1,
- MACSEC_VALIDATE_STRICT = 2,
- __MACSEC_VALIDATE_END,
- MACSEC_VALIDATE_MAX = __MACSEC_VALIDATE_END - 1,
-};
-
-/* IPVLAN section */
-enum {
- IFLA_IPVLAN_UNSPEC,
- IFLA_IPVLAN_MODE,
- IFLA_IPVLAN_FLAGS,
- __IFLA_IPVLAN_MAX
-};
-
-#define IFLA_IPVLAN_MAX (__IFLA_IPVLAN_MAX - 1)
-
-enum ipvlan_mode {
- IPVLAN_MODE_L2 = 0,
- IPVLAN_MODE_L3,
- IPVLAN_MODE_L3S,
- IPVLAN_MODE_MAX
-};
-
-#define IPVLAN_F_PRIVATE 0x01
-#define IPVLAN_F_VEPA 0x02
-
-/* VXLAN section */
-enum {
- IFLA_VXLAN_UNSPEC,
- IFLA_VXLAN_ID,
- IFLA_VXLAN_GROUP, /* group or remote address */
- IFLA_VXLAN_LINK,
- IFLA_VXLAN_LOCAL,
- IFLA_VXLAN_TTL,
- IFLA_VXLAN_TOS,
- IFLA_VXLAN_LEARNING,
- IFLA_VXLAN_AGEING,
- IFLA_VXLAN_LIMIT,
- IFLA_VXLAN_PORT_RANGE, /* source port */
- IFLA_VXLAN_PROXY,
- IFLA_VXLAN_RSC,
- IFLA_VXLAN_L2MISS,
- IFLA_VXLAN_L3MISS,
- IFLA_VXLAN_PORT, /* destination port */
- IFLA_VXLAN_GROUP6,
- IFLA_VXLAN_LOCAL6,
- IFLA_VXLAN_UDP_CSUM,
- IFLA_VXLAN_UDP_ZERO_CSUM6_TX,
- IFLA_VXLAN_UDP_ZERO_CSUM6_RX,
- IFLA_VXLAN_REMCSUM_TX,
- IFLA_VXLAN_REMCSUM_RX,
- IFLA_VXLAN_GBP,
- IFLA_VXLAN_REMCSUM_NOPARTIAL,
- IFLA_VXLAN_COLLECT_METADATA,
- IFLA_VXLAN_LABEL,
- IFLA_VXLAN_GPE,
- IFLA_VXLAN_TTL_INHERIT,
- IFLA_VXLAN_DF,
- __IFLA_VXLAN_MAX
-};
-#define IFLA_VXLAN_MAX (__IFLA_VXLAN_MAX - 1)
-
-struct ifla_vxlan_port_range {
- __be16 low;
- __be16 high;
-};
-
-enum ifla_vxlan_df {
- VXLAN_DF_UNSET = 0,
- VXLAN_DF_SET,
- VXLAN_DF_INHERIT,
- __VXLAN_DF_END,
- VXLAN_DF_MAX = __VXLAN_DF_END - 1,
-};
-
-/* GENEVE section */
-enum {
- IFLA_GENEVE_UNSPEC,
- IFLA_GENEVE_ID,
- IFLA_GENEVE_REMOTE,
- IFLA_GENEVE_TTL,
- IFLA_GENEVE_TOS,
- IFLA_GENEVE_PORT, /* destination port */
- IFLA_GENEVE_COLLECT_METADATA,
- IFLA_GENEVE_REMOTE6,
- IFLA_GENEVE_UDP_CSUM,
- IFLA_GENEVE_UDP_ZERO_CSUM6_TX,
- IFLA_GENEVE_UDP_ZERO_CSUM6_RX,
- IFLA_GENEVE_LABEL,
- IFLA_GENEVE_TTL_INHERIT,
- IFLA_GENEVE_DF,
- __IFLA_GENEVE_MAX
-};
-#define IFLA_GENEVE_MAX (__IFLA_GENEVE_MAX - 1)
-
-enum ifla_geneve_df {
- GENEVE_DF_UNSET = 0,
- GENEVE_DF_SET,
- GENEVE_DF_INHERIT,
- __GENEVE_DF_END,
- GENEVE_DF_MAX = __GENEVE_DF_END - 1,
-};
-
-/* PPP section */
-enum {
- IFLA_PPP_UNSPEC,
- IFLA_PPP_DEV_FD,
- __IFLA_PPP_MAX
-};
-#define IFLA_PPP_MAX (__IFLA_PPP_MAX - 1)
-
-/* GTP section */
-
-enum ifla_gtp_role {
- GTP_ROLE_GGSN = 0,
- GTP_ROLE_SGSN,
-};
-
-enum {
- IFLA_GTP_UNSPEC,
- IFLA_GTP_FD0,
- IFLA_GTP_FD1,
- IFLA_GTP_PDP_HASHSIZE,
- IFLA_GTP_ROLE,
- __IFLA_GTP_MAX,
-};
-#define IFLA_GTP_MAX (__IFLA_GTP_MAX - 1)
-
-/* Bonding section */
-
-enum {
- IFLA_BOND_UNSPEC,
- IFLA_BOND_MODE,
- IFLA_BOND_ACTIVE_SLAVE,
- IFLA_BOND_MIIMON,
- IFLA_BOND_UPDELAY,
- IFLA_BOND_DOWNDELAY,
- IFLA_BOND_USE_CARRIER,
- IFLA_BOND_ARP_INTERVAL,
- IFLA_BOND_ARP_IP_TARGET,
- IFLA_BOND_ARP_VALIDATE,
- IFLA_BOND_ARP_ALL_TARGETS,
- IFLA_BOND_PRIMARY,
- IFLA_BOND_PRIMARY_RESELECT,
- IFLA_BOND_FAIL_OVER_MAC,
- IFLA_BOND_XMIT_HASH_POLICY,
- IFLA_BOND_RESEND_IGMP,
- IFLA_BOND_NUM_PEER_NOTIF,
- IFLA_BOND_ALL_SLAVES_ACTIVE,
- IFLA_BOND_MIN_LINKS,
- IFLA_BOND_LP_INTERVAL,
- IFLA_BOND_PACKETS_PER_SLAVE,
- IFLA_BOND_AD_LACP_RATE,
- IFLA_BOND_AD_SELECT,
- IFLA_BOND_AD_INFO,
- IFLA_BOND_AD_ACTOR_SYS_PRIO,
- IFLA_BOND_AD_USER_PORT_KEY,
- IFLA_BOND_AD_ACTOR_SYSTEM,
- IFLA_BOND_TLB_DYNAMIC_LB,
- __IFLA_BOND_MAX,
-};
-
-#define IFLA_BOND_MAX (__IFLA_BOND_MAX - 1)
-
-enum {
- IFLA_BOND_AD_INFO_UNSPEC,
- IFLA_BOND_AD_INFO_AGGREGATOR,
- IFLA_BOND_AD_INFO_NUM_PORTS,
- IFLA_BOND_AD_INFO_ACTOR_KEY,
- IFLA_BOND_AD_INFO_PARTNER_KEY,
- IFLA_BOND_AD_INFO_PARTNER_MAC,
- __IFLA_BOND_AD_INFO_MAX,
-};
-
-#define IFLA_BOND_AD_INFO_MAX (__IFLA_BOND_AD_INFO_MAX - 1)
-
-enum {
- IFLA_BOND_SLAVE_UNSPEC,
- IFLA_BOND_SLAVE_STATE,
- IFLA_BOND_SLAVE_MII_STATUS,
- IFLA_BOND_SLAVE_LINK_FAILURE_COUNT,
- IFLA_BOND_SLAVE_PERM_HWADDR,
- IFLA_BOND_SLAVE_QUEUE_ID,
- IFLA_BOND_SLAVE_AD_AGGREGATOR_ID,
- IFLA_BOND_SLAVE_AD_ACTOR_OPER_PORT_STATE,
- IFLA_BOND_SLAVE_AD_PARTNER_OPER_PORT_STATE,
- __IFLA_BOND_SLAVE_MAX,
-};
-
-#define IFLA_BOND_SLAVE_MAX (__IFLA_BOND_SLAVE_MAX - 1)
-
-/* SR-IOV virtual function management section */
-
-enum {
- IFLA_VF_INFO_UNSPEC,
- IFLA_VF_INFO,
- __IFLA_VF_INFO_MAX,
-};
-
-#define IFLA_VF_INFO_MAX (__IFLA_VF_INFO_MAX - 1)
-
-enum {
- IFLA_VF_UNSPEC,
- IFLA_VF_MAC, /* Hardware queue specific attributes */
- IFLA_VF_VLAN, /* VLAN ID and QoS */
- IFLA_VF_TX_RATE, /* Max TX Bandwidth Allocation */
- IFLA_VF_SPOOFCHK, /* Spoof Checking on/off switch */
- IFLA_VF_LINK_STATE, /* link state enable/disable/auto switch */
- IFLA_VF_RATE, /* Min and Max TX Bandwidth Allocation */
- IFLA_VF_RSS_QUERY_EN, /* RSS Redirection Table and Hash Key query
- * on/off switch
- */
- IFLA_VF_STATS, /* network device statistics */
- IFLA_VF_TRUST, /* Trust VF */
- IFLA_VF_IB_NODE_GUID, /* VF Infiniband node GUID */
- IFLA_VF_IB_PORT_GUID, /* VF Infiniband port GUID */
- IFLA_VF_VLAN_LIST, /* nested list of vlans, option for QinQ */
- __IFLA_VF_MAX,
-};
-
-#define IFLA_VF_MAX (__IFLA_VF_MAX - 1)
-
-struct ifla_vf_mac {
- __u32 vf;
- __u8 mac[32]; /* MAX_ADDR_LEN */
-};
-
-struct ifla_vf_vlan {
- __u32 vf;
- __u32 vlan; /* 0 - 4095, 0 disables VLAN filter */
- __u32 qos;
-};
-
-enum {
- IFLA_VF_VLAN_INFO_UNSPEC,
- IFLA_VF_VLAN_INFO, /* VLAN ID, QoS and VLAN protocol */
- __IFLA_VF_VLAN_INFO_MAX,
-};
-
-#define IFLA_VF_VLAN_INFO_MAX (__IFLA_VF_VLAN_INFO_MAX - 1)
-#define MAX_VLAN_LIST_LEN 1
-
-struct ifla_vf_vlan_info {
- __u32 vf;
- __u32 vlan; /* 0 - 4095, 0 disables VLAN filter */
- __u32 qos;
- __be16 vlan_proto; /* VLAN protocol either 802.1Q or 802.1ad */
-};
-
-struct ifla_vf_tx_rate {
- __u32 vf;
- __u32 rate; /* Max TX bandwidth in Mbps, 0 disables throttling */
-};
-
-struct ifla_vf_rate {
- __u32 vf;
- __u32 min_tx_rate; /* Min Bandwidth in Mbps */
- __u32 max_tx_rate; /* Max Bandwidth in Mbps */
-};
-
-struct ifla_vf_spoofchk {
- __u32 vf;
- __u32 setting;
-};
-
-struct ifla_vf_guid {
- __u32 vf;
- __u64 guid;
-};
-
-enum {
- IFLA_VF_LINK_STATE_AUTO, /* link state of the uplink */
- IFLA_VF_LINK_STATE_ENABLE, /* link always up */
- IFLA_VF_LINK_STATE_DISABLE, /* link always down */
- __IFLA_VF_LINK_STATE_MAX,
-};
-
-struct ifla_vf_link_state {
- __u32 vf;
- __u32 link_state;
-};
-
-struct ifla_vf_rss_query_en {
- __u32 vf;
- __u32 setting;
-};
-
-enum {
- IFLA_VF_STATS_RX_PACKETS,
- IFLA_VF_STATS_TX_PACKETS,
- IFLA_VF_STATS_RX_BYTES,
- IFLA_VF_STATS_TX_BYTES,
- IFLA_VF_STATS_BROADCAST,
- IFLA_VF_STATS_MULTICAST,
- IFLA_VF_STATS_PAD,
- IFLA_VF_STATS_RX_DROPPED,
- IFLA_VF_STATS_TX_DROPPED,
- __IFLA_VF_STATS_MAX,
-};
-
-#define IFLA_VF_STATS_MAX (__IFLA_VF_STATS_MAX - 1)
-
-struct ifla_vf_trust {
- __u32 vf;
- __u32 setting;
-};
-
-/* VF ports management section
- *
- * Nested layout of set/get msg is:
- *
- * [IFLA_NUM_VF]
- * [IFLA_VF_PORTS]
- * [IFLA_VF_PORT]
- * [IFLA_PORT_*], ...
- * [IFLA_VF_PORT]
- * [IFLA_PORT_*], ...
- * ...
- * [IFLA_PORT_SELF]
- * [IFLA_PORT_*], ...
- */
-
-enum {
- IFLA_VF_PORT_UNSPEC,
- IFLA_VF_PORT, /* nest */
- __IFLA_VF_PORT_MAX,
-};
-
-#define IFLA_VF_PORT_MAX (__IFLA_VF_PORT_MAX - 1)
-
-enum {
- IFLA_PORT_UNSPEC,
- IFLA_PORT_VF, /* __u32 */
- IFLA_PORT_PROFILE, /* string */
- IFLA_PORT_VSI_TYPE, /* 802.1Qbg (pre-)standard VDP */
- IFLA_PORT_INSTANCE_UUID, /* binary UUID */
- IFLA_PORT_HOST_UUID, /* binary UUID */
- IFLA_PORT_REQUEST, /* __u8 */
- IFLA_PORT_RESPONSE, /* __u16, output only */
- __IFLA_PORT_MAX,
-};
-
-#define IFLA_PORT_MAX (__IFLA_PORT_MAX - 1)
-
-#define PORT_PROFILE_MAX 40
-#define PORT_UUID_MAX 16
-#define PORT_SELF_VF -1
-
-enum {
- PORT_REQUEST_PREASSOCIATE = 0,
- PORT_REQUEST_PREASSOCIATE_RR,
- PORT_REQUEST_ASSOCIATE,
- PORT_REQUEST_DISASSOCIATE,
-};
-
-enum {
- PORT_VDP_RESPONSE_SUCCESS = 0,
- PORT_VDP_RESPONSE_INVALID_FORMAT,
- PORT_VDP_RESPONSE_INSUFFICIENT_RESOURCES,
- PORT_VDP_RESPONSE_UNUSED_VTID,
- PORT_VDP_RESPONSE_VTID_VIOLATION,
- PORT_VDP_RESPONSE_VTID_VERSION_VIOALTION,
- PORT_VDP_RESPONSE_OUT_OF_SYNC,
- /* 0x08-0xFF reserved for future VDP use */
- PORT_PROFILE_RESPONSE_SUCCESS = 0x100,
- PORT_PROFILE_RESPONSE_INPROGRESS,
- PORT_PROFILE_RESPONSE_INVALID,
- PORT_PROFILE_RESPONSE_BADSTATE,
- PORT_PROFILE_RESPONSE_INSUFFICIENT_RESOURCES,
- PORT_PROFILE_RESPONSE_ERROR,
-};
-
-struct ifla_port_vsi {
- __u8 vsi_mgr_id;
- __u8 vsi_type_id[3];
- __u8 vsi_type_version;
- __u8 pad[3];
-};
-
-
-/* IPoIB section */
-
-enum {
- IFLA_IPOIB_UNSPEC,
- IFLA_IPOIB_PKEY,
- IFLA_IPOIB_MODE,
- IFLA_IPOIB_UMCAST,
- __IFLA_IPOIB_MAX
-};
-
-enum {
- IPOIB_MODE_DATAGRAM = 0, /* using unreliable datagram QPs */
- IPOIB_MODE_CONNECTED = 1, /* using connected QPs */
-};
-
-#define IFLA_IPOIB_MAX (__IFLA_IPOIB_MAX - 1)
-
-
-/* HSR section */
-
-enum {
- IFLA_HSR_UNSPEC,
- IFLA_HSR_SLAVE1,
- IFLA_HSR_SLAVE2,
- IFLA_HSR_MULTICAST_SPEC, /* Last byte of supervision addr */
- IFLA_HSR_SUPERVISION_ADDR, /* Supervision frame multicast addr */
- IFLA_HSR_SEQ_NR,
- IFLA_HSR_VERSION, /* HSR version */
- __IFLA_HSR_MAX,
-};
-
-#define IFLA_HSR_MAX (__IFLA_HSR_MAX - 1)
-
-/* STATS section */
-
-struct if_stats_msg {
- __u8 family;
- __u8 pad1;
- __u16 pad2;
- __u32 ifindex;
- __u32 filter_mask;
-};
-
-/* A stats attribute can be netdev specific or a global stat.
- * For netdev stats, lets use the prefix IFLA_STATS_LINK_*
- */
-enum {
- IFLA_STATS_UNSPEC, /* also used as 64bit pad attribute */
- IFLA_STATS_LINK_64,
- IFLA_STATS_LINK_XSTATS,
- IFLA_STATS_LINK_XSTATS_SLAVE,
- IFLA_STATS_LINK_OFFLOAD_XSTATS,
- IFLA_STATS_AF_SPEC,
- __IFLA_STATS_MAX,
-};
-
-#define IFLA_STATS_MAX (__IFLA_STATS_MAX - 1)
-
-#define IFLA_STATS_FILTER_BIT(ATTR) (1 << (ATTR - 1))
-
-/* These are embedded into IFLA_STATS_LINK_XSTATS:
- * [IFLA_STATS_LINK_XSTATS]
- * -> [LINK_XSTATS_TYPE_xxx]
- * -> [rtnl link type specific attributes]
- */
-enum {
- LINK_XSTATS_TYPE_UNSPEC,
- LINK_XSTATS_TYPE_BRIDGE,
- LINK_XSTATS_TYPE_BOND,
- __LINK_XSTATS_TYPE_MAX
-};
-#define LINK_XSTATS_TYPE_MAX (__LINK_XSTATS_TYPE_MAX - 1)
-
-/* These are stats embedded into IFLA_STATS_LINK_OFFLOAD_XSTATS */
-enum {
- IFLA_OFFLOAD_XSTATS_UNSPEC,
- IFLA_OFFLOAD_XSTATS_CPU_HIT, /* struct rtnl_link_stats64 */
- __IFLA_OFFLOAD_XSTATS_MAX
-};
-#define IFLA_OFFLOAD_XSTATS_MAX (__IFLA_OFFLOAD_XSTATS_MAX - 1)
-
-/* XDP section */
-
-#define XDP_FLAGS_UPDATE_IF_NOEXIST (1U << 0)
-#define XDP_FLAGS_SKB_MODE (1U << 1)
-#define XDP_FLAGS_DRV_MODE (1U << 2)
-#define XDP_FLAGS_HW_MODE (1U << 3)
-#define XDP_FLAGS_MODES (XDP_FLAGS_SKB_MODE | \
- XDP_FLAGS_DRV_MODE | \
- XDP_FLAGS_HW_MODE)
-#define XDP_FLAGS_MASK (XDP_FLAGS_UPDATE_IF_NOEXIST | \
- XDP_FLAGS_MODES)
-
-/* These are stored into IFLA_XDP_ATTACHED on dump. */
-enum {
- XDP_ATTACHED_NONE = 0,
- XDP_ATTACHED_DRV,
- XDP_ATTACHED_SKB,
- XDP_ATTACHED_HW,
- XDP_ATTACHED_MULTI,
-};
-
-enum {
- IFLA_XDP_UNSPEC,
- IFLA_XDP_FD,
- IFLA_XDP_ATTACHED,
- IFLA_XDP_FLAGS,
- IFLA_XDP_PROG_ID,
- IFLA_XDP_DRV_PROG_ID,
- IFLA_XDP_SKB_PROG_ID,
- IFLA_XDP_HW_PROG_ID,
- __IFLA_XDP_MAX,
-};
-
-#define IFLA_XDP_MAX (__IFLA_XDP_MAX - 1)
-
-enum {
- IFLA_EVENT_NONE,
- IFLA_EVENT_REBOOT, /* internal reset / reboot */
- IFLA_EVENT_FEATURES, /* change in offload features */
- IFLA_EVENT_BONDING_FAILOVER, /* change in active slave */
- IFLA_EVENT_NOTIFY_PEERS, /* re-sent grat. arp/ndisc */
- IFLA_EVENT_IGMP_RESEND, /* re-sent IGMP JOIN */
- IFLA_EVENT_BONDING_OPTIONS, /* change in bonding options */
-};
-
-/* tun section */
-
-enum {
- IFLA_TUN_UNSPEC,
- IFLA_TUN_OWNER,
- IFLA_TUN_GROUP,
- IFLA_TUN_TYPE,
- IFLA_TUN_PI,
- IFLA_TUN_VNET_HDR,
- IFLA_TUN_PERSIST,
- IFLA_TUN_MULTI_QUEUE,
- IFLA_TUN_NUM_QUEUES,
- IFLA_TUN_NUM_DISABLED_QUEUES,
- __IFLA_TUN_MAX,
-};
-
-#define IFLA_TUN_MAX (__IFLA_TUN_MAX - 1)
-
-/* rmnet section */
-
-#define RMNET_FLAGS_INGRESS_DEAGGREGATION (1U << 0)
-#define RMNET_FLAGS_INGRESS_MAP_COMMANDS (1U << 1)
-#define RMNET_FLAGS_INGRESS_MAP_CKSUMV4 (1U << 2)
-#define RMNET_FLAGS_EGRESS_MAP_CKSUMV4 (1U << 3)
-
-enum {
- IFLA_RMNET_UNSPEC,
- IFLA_RMNET_MUX_ID,
- IFLA_RMNET_FLAGS,
- __IFLA_RMNET_MAX,
-};
-
-#define IFLA_RMNET_MAX (__IFLA_RMNET_MAX - 1)
-
-struct ifla_rmnet_flags {
- __u32 flags;
- __u32 mask;
-};
-
-#endif /* _UAPI_LINUX_IF_LINK_H */
diff --git a/src/xdp/include/linux/if_xdp.h b/src/xdp/include/linux/if_xdp.h
deleted file mode 100644
index be328c593..000000000
--- a/src/xdp/include/linux/if_xdp.h
+++ /dev/null
@@ -1,108 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-/*
- * if_xdp: XDP socket user-space interface
- * Copyright(c) 2018 Intel Corporation.
- *
- * Author(s): Björn Töpel <bjorn.topel@intel.com>
- * Magnus Karlsson <magnus.karlsson@intel.com>
- */
-
-#ifndef _LINUX_IF_XDP_H
-#define _LINUX_IF_XDP_H
-
-#include <linux/types.h>
-
-/* Options for the sxdp_flags field */
-#define XDP_SHARED_UMEM (1 << 0)
-#define XDP_COPY (1 << 1) /* Force copy-mode */
-#define XDP_ZEROCOPY (1 << 2) /* Force zero-copy mode */
-/* If this option is set, the driver might go sleep and in that case
- * the XDP_RING_NEED_WAKEUP flag in the fill and/or Tx rings will be
- * set. If it is set, the application need to explicitly wake up the
- * driver with a poll() (Rx and Tx) or sendto() (Tx only). If you are
- * running the driver and the application on the same core, you should
- * use this option so that the kernel will yield to the user space
- * application.
- */
-#define XDP_USE_NEED_WAKEUP (1 << 3)
-
-/* Flags for xsk_umem_config flags */
-#define XDP_UMEM_UNALIGNED_CHUNK_FLAG (1 << 0)
-
-struct sockaddr_xdp {
- __u16 sxdp_family;
- __u16 sxdp_flags;
- __u32 sxdp_ifindex;
- __u32 sxdp_queue_id;
- __u32 sxdp_shared_umem_fd;
-};
-
-/* XDP_RING flags */
-#define XDP_RING_NEED_WAKEUP (1 << 0)
-
-struct xdp_ring_offset {
- __u64 producer;
- __u64 consumer;
- __u64 desc;
- __u64 flags;
-};
-
-struct xdp_mmap_offsets {
- struct xdp_ring_offset rx;
- struct xdp_ring_offset tx;
- struct xdp_ring_offset fr; /* Fill */
- struct xdp_ring_offset cr; /* Completion */
-};
-
-/* XDP socket options */
-#define XDP_MMAP_OFFSETS 1
-#define XDP_RX_RING 2
-#define XDP_TX_RING 3
-#define XDP_UMEM_REG 4
-#define XDP_UMEM_FILL_RING 5
-#define XDP_UMEM_COMPLETION_RING 6
-#define XDP_STATISTICS 7
-#define XDP_OPTIONS 8
-
-struct xdp_umem_reg {
- __u64 addr; /* Start of packet data area */
- __u64 len; /* Length of packet data area */
- __u32 chunk_size;
- __u32 headroom;
- __u32 flags;
-};
-
-struct xdp_statistics {
- __u64 rx_dropped; /* Dropped for reasons other than invalid desc */
- __u64 rx_invalid_descs; /* Dropped due to invalid descriptor */
- __u64 tx_invalid_descs; /* Dropped due to invalid descriptor */
-};
-
-struct xdp_options {
- __u32 flags;
-};
-
-/* Flags for the flags field of struct xdp_options */
-#define XDP_OPTIONS_ZEROCOPY (1 << 0)
-
-/* Pgoff for mmaping the rings */
-#define XDP_PGOFF_RX_RING 0
-#define XDP_PGOFF_TX_RING 0x80000000
-#define XDP_UMEM_PGOFF_FILL_RING 0x100000000ULL
-#define XDP_UMEM_PGOFF_COMPLETION_RING 0x180000000ULL
-
-/* Masks for unaligned chunks mode */
-#define XSK_UNALIGNED_BUF_OFFSET_SHIFT 48
-#define XSK_UNALIGNED_BUF_ADDR_MASK \
- ((1ULL << XSK_UNALIGNED_BUF_OFFSET_SHIFT) - 1)
-
-/* Rx/Tx descriptor */
-struct xdp_desc {
- __u64 addr;
- __u32 len;
- __u32 options;
-};
-
-/* UMEM descriptor is __u64 */
-
-#endif /* _LINUX_IF_XDP_H */
diff --git a/src/xdp/include/perf-sys.h b/src/xdp/include/perf-sys.h
deleted file mode 100644
index 2fd16e482..000000000
--- a/src/xdp/include/perf-sys.h
+++ /dev/null
@@ -1,77 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/* Copied from $(LINUX)/tools/perf/perf-sys.h (kernel 4.18) */
-#ifndef _PERF_SYS_H
-#define _PERF_SYS_H
-
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/syscall.h>
-#include <linux/types.h>
-#include <linux/perf_event.h>
-/*
- * remove the following headers to allow for userspace program compilation
- * #include <linux/compiler.h>
- * #include <asm/barrier.h>
- */
-#ifdef __powerpc__
-#define CPUINFO_PROC {"cpu"}
-#endif
-
-#ifdef __s390__
-#define CPUINFO_PROC {"vendor_id"}
-#endif
-
-#ifdef __sh__
-#define CPUINFO_PROC {"cpu type"}
-#endif
-
-#ifdef __hppa__
-#define CPUINFO_PROC {"cpu"}
-#endif
-
-#ifdef __sparc__
-#define CPUINFO_PROC {"cpu"}
-#endif
-
-#ifdef __alpha__
-#define CPUINFO_PROC {"cpu model"}
-#endif
-
-#ifdef __arm__
-#define CPUINFO_PROC {"model name", "Processor"}
-#endif
-
-#ifdef __mips__
-#define CPUINFO_PROC {"cpu model"}
-#endif
-
-#ifdef __arc__
-#define CPUINFO_PROC {"Processor"}
-#endif
-
-#ifdef __xtensa__
-#define CPUINFO_PROC {"core ID"}
-#endif
-
-#ifndef CPUINFO_PROC
-#define CPUINFO_PROC { "model name", }
-#endif
-
-static inline int
-sys_perf_event_open(struct perf_event_attr *attr,
- pid_t pid, int cpu, int group_fd,
- unsigned long flags)
-{
- int fd;
-
- fd = syscall(__NR_perf_event_open, attr, pid, cpu,
- group_fd, flags);
-
-#ifdef HAVE_ATTR_TEST
- if (unlikely(test_attr__enabled))
- test_attr__open(attr, pid, cpu, fd, group_fd, flags);
-#endif
- return fd;
-}
-
-#endif /* _PERF_SYS_H */
diff --git a/src/xdp/utils/Makefile b/src/xdp/utils/Makefile
deleted file mode 100644
index 42d6e63e3..000000000
--- a/src/xdp/utils/Makefile
+++ /dev/null
@@ -1,11 +0,0 @@
-# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
-
-USER_TARGETS := xdp_stats xdp_loader
-
-LIBBPF_DIR = ../libbpf/src/
-COMMON_DIR = ../common/
-
-# Extend with another COMMON_OBJS
-COMMON_OBJS += $(COMMON_DIR)/common_libbpf.o
-
-include $(COMMON_DIR)/common.mk
diff --git a/src/xdp/utils/xdp_loader.c b/src/xdp/utils/xdp_loader.c
deleted file mode 100644
index d3b05d0c0..000000000
--- a/src/xdp/utils/xdp_loader.c
+++ /dev/null
@@ -1,165 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-static const char *__doc__ = "XDP loader\n"
- " - Allows selecting BPF section --progsec name to XDP-attach to --dev\n";
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <errno.h>
-#include <getopt.h>
-
-#include <locale.h>
-#include <unistd.h>
-#include <time.h>
-
-#include <bpf/bpf.h>
-#include <bpf/libbpf.h>
-
-#include <net/if.h>
-#include <linux/if_link.h> /* depend on kernel-headers installed */
-
-#include "../common/common_params.h"
-#include "../common/common_user_bpf_xdp.h"
-#include "../common/common_libbpf.h"
-
-static const char *default_filename = "xdp_prog_kern.o";
-
-static const struct option_wrapper long_options[] = {
-
- {{"help", no_argument, NULL, 'h' },
- "Show help", false},
-
- {{"dev", required_argument, NULL, 'd' },
- "Operate on device <ifname>", "<ifname>", true},
-
- {{"skb-mode", no_argument, NULL, 'S' },
- "Install XDP program in SKB (AKA generic) mode"},
-
- {{"native-mode", no_argument, NULL, 'N' },
- "Install XDP program in native mode"},
-
- {{"auto-mode", no_argument, NULL, 'A' },
- "Auto-detect SKB or native mode"},
-
- {{"force", no_argument, NULL, 'F' },
- "Force install, replacing existing program on interface"},
-
- {{"unload", no_argument, NULL, 'U' },
- "Unload XDP program instead of loading"},
-
- {{"reuse-maps", no_argument, NULL, 'M' },
- "Reuse pinned maps"},
-
- {{"quiet", no_argument, NULL, 'q' },
- "Quiet mode (no output)"},
-
- {{"filename", required_argument, NULL, 1 },
- "Load program from <file>", "<file>"},
-
- {{"progsec", required_argument, NULL, 2 },
- "Load program in <section> of the ELF file", "<section>"},
-
- {{0, 0, NULL, 0 }, NULL, false}
-};
-
-#ifndef PATH_MAX
-#define PATH_MAX 4096
-#endif
-
-const char *pin_basedir = "/sys/fs/bpf";
-const char *map_name = "xdp_stats_map";
-
-/* Pinning maps under /sys/fs/bpf in subdir */
-int pin_maps_in_bpf_object(struct bpf_object *bpf_obj, struct config *cfg)
-{
- char map_filename[PATH_MAX];
- int err, len;
-
- len = snprintf(map_filename, PATH_MAX, "%s/%s/%s",
- pin_basedir, cfg->ifname, map_name);
- if (len < 0) {
- fprintf(stderr, "ERR: creating map_name\n");
- return EXIT_FAIL_OPTION;
- }
-
- /* Existing/previous XDP prog might not have cleaned up */
- if (access(map_filename, F_OK ) != -1 ) {
- if (verbose)
- printf(" - Unpinning (remove) prev maps in %s/\n",
- cfg->pin_dir);
-
- /* Basically calls unlink(3) on map_filename */
- err = bpf_object__unpin_maps(bpf_obj, cfg->pin_dir);
- if (err) {
- fprintf(stderr, "ERR: UNpinning maps in %s\n", cfg->pin_dir);
- return EXIT_FAIL_BPF;
- }
- }
- if (verbose)
- printf(" - Pinning maps in %s/\n", cfg->pin_dir);
-
- /* This will pin all maps in our bpf_object */
- err = bpf_object__pin_maps(bpf_obj, cfg->pin_dir);
- if (err)
- return EXIT_FAIL_BPF;
-
- return 0;
-}
-
-int main(int argc, char **argv)
-{
- struct bpf_object *bpf_obj;
- int err, len;
-
- struct config cfg = {
- .xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST | XDP_FLAGS_DRV_MODE,
- .ifindex = -1,
- .do_unload = false,
- };
- /* Set default BPF-ELF object file and BPF program name */
- strncpy(cfg.filename, default_filename, sizeof(cfg.filename));
- /* Cmdline options can change progsec */
- parse_cmdline_args(argc, argv, long_options, &cfg, __doc__);
-
- /* Required option */
- if (cfg.ifindex == -1) {
- fprintf(stderr, "ERR: required option --dev missing\n\n");
- usage(argv[0], __doc__, long_options, (argc == 1));
- return EXIT_FAIL_OPTION;
- }
- if (cfg.do_unload) {
- if (!cfg.reuse_maps) {
- /* TODO: Miss unpin of maps on unload */
- }
- return xdp_link_detach(cfg.ifindex, cfg.xdp_flags, 0);
- }
-
- len = snprintf(cfg.pin_dir, PATH_MAX, "%s/%s", pin_basedir, cfg.ifname);
- if (len < 0) {
- fprintf(stderr, "ERR: creating pin dirname\n");
- return EXIT_FAIL_OPTION;
- }
-
-
- bpf_obj = load_bpf_and_xdp_attach(&cfg);
- if (!bpf_obj)
- return EXIT_FAIL_BPF;
-
- if (verbose) {
- printf("Success: Loaded BPF-object(%s) and used section(%s)\n",
- cfg.filename, cfg.progsec);
- printf(" - XDP prog attached on device:%s(ifindex:%d)\n",
- cfg.ifname, cfg.ifindex);
- }
-
- /* Use the --dev name as subdir for exporting/pinning maps */
- if (!cfg.reuse_maps) {
- err = pin_maps_in_bpf_object(bpf_obj, &cfg);
- if (err) {
- fprintf(stderr, "ERR: pinning maps\n");
- return err;
- }
- }
-
- return EXIT_OK;
-}
diff --git a/src/xdp/utils/xdp_stats.c b/src/xdp/utils/xdp_stats.c
deleted file mode 100644
index f9fa7438f..000000000
--- a/src/xdp/utils/xdp_stats.c
+++ /dev/null
@@ -1,298 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-static const char *__doc__ = "XDP stats program\n"
- " - Finding xdp_stats_map via --dev name info\n";
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <errno.h>
-#include <getopt.h>
-
-#include <locale.h>
-#include <unistd.h>
-#include <time.h>
-
-#include <bpf/bpf.h>
-/* Lesson#1: this prog does not need to #include <bpf/libbpf.h> as it only uses
- * the simple bpf-syscall wrappers, defined in libbpf #include<bpf/bpf.h>
- */
-
-#include <net/if.h>
-#include <linux/if_link.h> /* depend on kernel-headers installed */
-
-#include "../common/common_params.h"
-#include "../common/common_user_bpf_xdp.h"
-#include "../common/xdp_stats_kern_user.h"
-
-#include "../include/bpf_util.h" /* bpf_num_possible_cpus */
-
-static const struct option_wrapper long_options[] = {
- {{"help", no_argument, NULL, 'h' },
- "Show help", false},
-
- {{"dev", required_argument, NULL, 'd' },
- "Operate on device <ifname>", "<ifname>", true},
-
- {{"quiet", no_argument, NULL, 'q' },
- "Quiet mode (no output)"},
-
- {{0, 0, NULL, 0 }}
-};
-
-#define NANOSEC_PER_SEC 1000000000 /* 10^9 */
-static __u64 gettime(void)
-{
- struct timespec t;
- int res;
-
- res = clock_gettime(CLOCK_MONOTONIC, &t);
- if (res < 0) {
- fprintf(stderr, "Error with gettimeofday! (%i)\n", res);
- exit(EXIT_FAIL);
- }
- return (__u64) t.tv_sec * NANOSEC_PER_SEC + t.tv_nsec;
-}
-
-struct record {
- __u64 timestamp;
- struct datarec total; /* defined in common_kern_user.h */
-};
-
-struct stats_record {
- struct record stats[XDP_ACTION_MAX];
-};
-
-static double calc_period(struct record *r, struct record *p)
-{
- double period_ = 0;
- __u64 period = 0;
-
- period = r->timestamp - p->timestamp;
- if (period > 0)
- period_ = ((double) period / NANOSEC_PER_SEC);
-
- return period_;
-}
-
-static void stats_print_header()
-{
- /* Print stats "header" */
- printf("%-12s\n", "XDP-action");
-}
-
-static void stats_print(struct stats_record *stats_rec,
- struct stats_record *stats_prev)
-{
- struct record *rec, *prev;
- __u64 packets, bytes;
- double period;
- double pps; /* packets per sec */
- double bps; /* bits per sec */
- int i;
-
- stats_print_header(); /* Print stats "header" */
-
- /* Print for each XDP actions stats */
- for (i = 0; i < XDP_ACTION_MAX; i++)
- {
- char *fmt = "%-12s %'11lld pkts (%'10.0f pps)"
- " %'11lld Kbytes (%'6.0f Mbits/s)"
- " period:%f\n";
- const char *action = action2str(i);
-
- rec = &stats_rec->stats[i];
- prev = &stats_prev->stats[i];
-
- period = calc_period(rec, prev);
- if (period == 0)
- return;
-
- packets = rec->total.rx_packets - prev->total.rx_packets;
- pps = packets / period;
-
- bytes = rec->total.rx_bytes - prev->total.rx_bytes;
- bps = (bytes * 8)/ period / 1000000;
-
- printf(fmt, action, rec->total.rx_packets, pps,
- rec->total.rx_bytes / 1000 , bps,
- period);
- }
- printf("\n");
-}
-
-
-/* BPF_MAP_TYPE_ARRAY */
-void map_get_value_array(int fd, __u32 key, struct datarec *value)
-{
- if ((bpf_map_lookup_elem(fd, &key, value)) != 0) {
- fprintf(stderr,
- "ERR: bpf_map_lookup_elem failed key:0x%X\n", key);
- }
-}
-
-/* BPF_MAP_TYPE_PERCPU_ARRAY */
-void map_get_value_percpu_array(int fd, __u32 key, struct datarec *value)
-{
- /* For percpu maps, userspace gets a value per possible CPU */
- unsigned int nr_cpus = bpf_num_possible_cpus();
- struct datarec values[nr_cpus];
- __u64 sum_bytes = 0;
- __u64 sum_pkts = 0;
- int i;
-
- if ((bpf_map_lookup_elem(fd, &key, values)) != 0) {
- fprintf(stderr,
- "ERR: bpf_map_lookup_elem failed key:0x%X\n", key);
- return;
- }
-
- /* Sum values from each CPU */
- for (i = 0; i < nr_cpus; i++) {
- sum_pkts += values[i].rx_packets;
- sum_bytes += values[i].rx_bytes;
- }
- value->rx_packets = sum_pkts;
- value->rx_bytes = sum_bytes;
-}
-
-static bool map_collect(int fd, __u32 map_type, __u32 key, struct record *rec)
-{
- struct datarec value;
-
- /* Get time as close as possible to reading map contents */
- rec->timestamp = gettime();
-
- switch (map_type) {
- case BPF_MAP_TYPE_ARRAY:
- map_get_value_array(fd, key, &value);
- break;
- case BPF_MAP_TYPE_PERCPU_ARRAY:
- map_get_value_percpu_array(fd, key, &value);
- break;
- default:
- fprintf(stderr, "ERR: Unknown map_type(%u) cannot handle\n",
- map_type);
- return false;
- break;
- }
-
- rec->total.rx_packets = value.rx_packets;
- rec->total.rx_bytes = value.rx_bytes;
- return true;
-}
-
-static void stats_collect(int map_fd, __u32 map_type,
- struct stats_record *stats_rec)
-{
- /* Collect all XDP actions stats */
- __u32 key;
-
- for (key = 0; key < XDP_ACTION_MAX; key++) {
- map_collect(map_fd, map_type, key, &stats_rec->stats[key]);
- }
-}
-
-static int stats_poll(const char *pin_dir, int map_fd, __u32 id,
- __u32 map_type, int interval)
-{
- struct bpf_map_info info = {};
- struct stats_record prev, record = { 0 };
- int counter = 0;
-
- /* Trick to pretty printf with thousands separators use %' */
- setlocale(LC_NUMERIC, "en_US");
-
- /* Get initial reading quickly */
- stats_collect(map_fd, map_type, &record);
- usleep(1000000/4);
-
- while (1) {
- prev = record; /* struct copy */
-
- map_fd = open_bpf_map_file(pin_dir, "xdp_stats_map", &info);
- if (map_fd < 0) {
- return EXIT_FAIL_BPF;
- } else if (id != info.id) {
- printf("BPF map xdp_stats_map changed its ID, restarting\n");
- return 0;
- }
-
- stats_collect(map_fd, map_type, &record);
- stats_print(&record, &prev);
- sleep(interval);
- counter++;
- if (counter > 1) {
- return 0;
- }
- }
-
- return 0;
-}
-
-#ifndef PATH_MAX
-#define PATH_MAX 4096
-#endif
-
-const char *pin_basedir = "/sys/fs/bpf";
-
-int main(int argc, char **argv)
-{
- const struct bpf_map_info map_expect = {
- .key_size = sizeof(__u32),
- .value_size = sizeof(struct datarec),
- .max_entries = XDP_ACTION_MAX,
- };
- struct bpf_map_info info = { 0 };
- char pin_dir[PATH_MAX];
- int stats_map_fd;
- int interval = 2;
- int len, err;
-
- struct config cfg = {
- .ifindex = -1,
- .do_unload = false,
- };
-
- /* Cmdline options can change progsec */
- parse_cmdline_args(argc, argv, long_options, &cfg, __doc__);
-
- /* Required option */
- if (cfg.ifindex == -1) {
- fprintf(stderr, "ERR: required option --dev missing\n\n");
- usage(argv[0], __doc__, long_options, (argc == 1));
- return EXIT_FAIL_OPTION;
- }
-
- /* Use the --dev name as subdir for finding pinned maps */
- len = snprintf(pin_dir, PATH_MAX, "%s/%s", pin_basedir, cfg.ifname);
- if (len < 0) {
- fprintf(stderr, "ERR: creating pin dirname\n");
- return EXIT_FAIL_OPTION;
- }
-
- stats_map_fd = open_bpf_map_file(pin_dir, "xdp_stats_map", &info);
- if (stats_map_fd < 0) {
- return EXIT_FAIL_BPF;
- }
-
- /* check map info, e.g. datarec is expected size */
- err = check_map_fd_info(&info, &map_expect);
- if (err) {
- fprintf(stderr, "ERR: map via FD not compatible\n");
- return err;
- }
- if (verbose) {
- printf("\nCollecting stats from BPF map\n");
- printf(" - BPF map (bpf_map_type:%d) id:%d name:%s"
- " key_size:%d value_size:%d max_entries:%d\n",
- info.type, info.id, info.name,
- info.key_size, info.value_size, info.max_entries
- );
- }
-
- err = stats_poll(pin_dir, stats_map_fd, info.id, info.type, interval);
- if (err < 0)
- return err;
-
- return EXIT_OK;
-}
diff --git a/src/xdp/xdp_prog_kern.c b/src/xdp/xdp_prog_kern.c
deleted file mode 100644
index 59308325d..000000000
--- a/src/xdp/xdp_prog_kern.c
+++ /dev/null
@@ -1,347 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#include <linux/bpf.h>
-#include <linux/in.h>
-#include <bpf/bpf_helpers.h>
-#include <bpf/bpf_endian.h>
-
-// The parsing helper functions from the packet01 lesson have moved here
-#include "common/parsing_helpers.h"
-#include "common/rewrite_helpers.h"
-
-/* Defines xdp_stats_map */
-#include "common/xdp_stats_kern_user.h"
-#include "common/xdp_stats_kern.h"
-
-#ifndef memcpy
-#define memcpy(dest, src, n) __builtin_memcpy((dest), (src), (n))
-#endif
-
-struct {
- __uint(type, BPF_MAP_TYPE_DEVMAP);
- __type(key, int);
- __type(value, int);
- __uint(max_entries, 256);
-} tx_port SEC(".maps");
-
-struct {
- __uint(type, BPF_MAP_TYPE_HASH);
- __type(key, ETH_ALEN);
- __type(value, ETH_ALEN);
- __uint(max_entries, 1);
-} redirect_params SEC(".maps");
-
-static __always_inline __u16 csum_fold_helper(__u32 csum)
-{
- return ~((csum & 0xffff) + (csum >> 16));
-}
-
-/*
- * The icmp_checksum_diff function takes pointers to old and new structures and
- * the old checksum and returns the new checksum. It uses the bpf_csum_diff
- * helper to compute the checksum difference. Note that the sizes passed to the
- * bpf_csum_diff helper should be multiples of 4, as it operates on 32-bit
- * words.
- */
-static __always_inline __u16 icmp_checksum_diff(
- __u16 seed,
- struct icmphdr_common *icmphdr_new,
- struct icmphdr_common *icmphdr_old)
-{
- __u32 csum, size = sizeof(struct icmphdr_common);
-
- csum = bpf_csum_diff((__be32 *)icmphdr_old, size, (__be32 *)icmphdr_new, size, seed);
- return csum_fold_helper(csum);
-}
-
-/* Solution to packet03/assignment-1 */
-SEC("xdp_icmp_echo")
-int xdp_icmp_echo_func(struct xdp_md *ctx)
-{
- void *data_end = (void *)(long)ctx->data_end;
- void *data = (void *)(long)ctx->data;
- struct hdr_cursor nh;
- struct ethhdr *eth;
- int eth_type;
- int ip_type;
- int icmp_type;
- struct iphdr *iphdr;
- struct ipv6hdr *ipv6hdr;
- __u16 echo_reply, old_csum;
- struct icmphdr_common *icmphdr;
- struct icmphdr_common icmphdr_old;
- __u32 action = XDP_PASS;
-
- /* These keep track of the next header type and iterator pointer */
- nh.pos = data;
-
- /* Parse Ethernet and IP/IPv6 headers */
- eth_type = parse_ethhdr(&nh, data_end, &eth);
- if (eth_type == bpf_htons(ETH_P_IP)) {
- ip_type = parse_iphdr(&nh, data_end, &iphdr);
- if (ip_type != IPPROTO_ICMP)
- goto out;
- } else if (eth_type == bpf_htons(ETH_P_IPV6)) {
- ip_type = parse_ip6hdr(&nh, data_end, &ipv6hdr);
- if (ip_type != IPPROTO_ICMPV6)
- goto out;
- } else {
- goto out;
- }
-
- /*
- * We are using a special parser here which returns a stucture
- * containing the "protocol-independent" part of an ICMP or ICMPv6
- * header. For purposes of this Assignment we are not interested in
- * the rest of the structure.
- */
- icmp_type = parse_icmphdr_common(&nh, data_end, &icmphdr);
- if (eth_type == bpf_htons(ETH_P_IP) && icmp_type == ICMP_ECHO) {
- /* Swap IP source and destination */
- swap_src_dst_ipv4(iphdr);
- echo_reply = ICMP_ECHOREPLY;
- } else if (eth_type == bpf_htons(ETH_P_IPV6)
- && icmp_type == ICMPV6_ECHO_REQUEST) {
- /* Swap IPv6 source and destination */
- swap_src_dst_ipv6(ipv6hdr);
- echo_reply = ICMPV6_ECHO_REPLY;
- } else {
- goto out;
- }
-
- /* Swap Ethernet source and destination */
- swap_src_dst_mac(eth);
-
-
- /* Patch the packet and update the checksum.*/
- old_csum = icmphdr->cksum;
- icmphdr->cksum = 0;
- icmphdr_old = *icmphdr;
- icmphdr->type = echo_reply;
- icmphdr->cksum = icmp_checksum_diff(~old_csum, icmphdr, &icmphdr_old);
-
- /* Another, less generic, but a bit more efficient way to update the
- * checksum is listed below. As only one 16-bit word changed, the sum
- * can be patched using this formula: sum' = ~(~sum + ~m0 + m1), where
- * sum' is a new sum, sum is an old sum, m0 and m1 are the old and new
- * 16-bit words, correspondingly. In the formula above the + operation
- * is defined as the following function:
- *
- * static __always_inline __u16 csum16_add(__u16 csum, __u16 addend)
- * {
- * csum += addend;
- * return csum + (csum < addend);
- * }
- *
- * So an alternative code to update the checksum might look like this:
- *
- * __u16 m0 = * (__u16 *) icmphdr;
- * icmphdr->type = echo_reply;
- * __u16 m1 = * (__u16 *) icmphdr;
- * icmphdr->checksum = ~(csum16_add(csum16_add(~icmphdr->checksum, ~m0), m1));
- */
-
- action = XDP_TX;
-
-out:
- return xdp_stats_record_action(ctx, action);
-}
-
-/* Solution to packet03/assignment-2 */
-SEC("xdp_redirect")
-int xdp_redirect_func(struct xdp_md *ctx)
-{
- void *data_end = (void *)(long)ctx->data_end;
- void *data = (void *)(long)ctx->data;
- struct hdr_cursor nh;
- struct ethhdr *eth;
- int eth_type;
- int action = XDP_PASS;
- unsigned char dst[ETH_ALEN] = { /* TODO: put your values here */ };
- unsigned ifindex = 0/* TODO: put your values here */;
-
- /* These keep track of the next header type and iterator pointer */
- nh.pos = data;
-
- /* Parse Ethernet and IP/IPv6 headers */
- eth_type = parse_ethhdr(&nh, data_end, &eth);
- if (eth_type == -1)
- goto out;
-
- /* Set a proper destination address */
- memcpy(eth->h_dest, dst, ETH_ALEN);
- action = bpf_redirect(ifindex, 0);
-
-out:
- return xdp_stats_record_action(ctx, action);
-}
-
-/* Solution to packet03/assignment-3 */
-SEC("xdp_redirect_map")
-int xdp_redirect_map_func(struct xdp_md *ctx)
-{
- void *data_end = (void *)(long)ctx->data_end;
- void *data = (void *)(long)ctx->data;
- struct hdr_cursor nh;
- struct ethhdr *eth;
- int eth_type;
- int action = XDP_PASS;
- unsigned char *dst;
-
- /* These keep track of the next header type and iterator pointer */
- nh.pos = data;
-
- /* Parse Ethernet and IP/IPv6 headers */
- eth_type = parse_ethhdr(&nh, data_end, &eth);
- if (eth_type == -1)
- goto out;
-
- /* Do we know where to redirect this packet? */
- dst = bpf_map_lookup_elem(&redirect_params, eth->h_source);
- if (!dst)
- goto out;
-
- /* Set a proper destination address */
- memcpy(eth->h_dest, dst, ETH_ALEN);
- action = bpf_redirect_map(&tx_port, 0, 0);
-
-out:
- return xdp_stats_record_action(ctx, action);
-}
-
-#ifndef AF_INET
-#define AF_INET 2
-#endif
-#ifndef AF_INET6
-#define AF_INET6 10
-#endif
-#define IPV6_FLOWINFO_MASK bpf_htonl(0x0FFFFFFF)
-
-/* from include/net/ip.h */
-static __always_inline int ip_decrease_ttl(struct iphdr *iph)
-{
- __u32 check = iph->check;
- check += bpf_htons(0x0100);
- iph->check = (__u16)(check + (check >= 0xFFFF));
- return --iph->ttl;
-}
-
-/* Solution to packet03/assignment-4 */
-/* xdp_router is the name of the xdp program */
-SEC("xdp_router")
-int xdp_router_func(struct xdp_md *ctx)
-{
- /* this is the packet context*/
- void *data_end = (void *)(long)ctx->data_end;
- void *data = (void *)(long)ctx->data;
- struct bpf_fib_lookup fib_params = {};
- struct ethhdr *eth = data;
- struct ipv6hdr *ip6h;
- struct iphdr *iph;
- __u16 h_proto;
- __u64 nh_off;
- int rc;
- /* default action is to pass */
- int action = XDP_PASS;
-
- nh_off = sizeof(*eth);
- if (data + nh_off > data_end) {
- action = XDP_DROP;
- goto out;
- }
-
- /* determine if this is IP4 or IPv6 by looking at the Ethernet protocol field */
- h_proto = eth->h_proto;
- if (h_proto == bpf_htons(ETH_P_IP)) {
- /* IPv4 part of the code */
- iph = data + nh_off;
-
- if (iph + 1 > data_end) {
- action = XDP_DROP;
- goto out;
- }
- /* as a real router, we need to check the TTL to prevent never ending loops*/
- if (iph->ttl <= 1)
- goto out;
-
- /* populate the fib_params fields to prepare for the lookup */
- fib_params.family = AF_INET;
- fib_params.tos = iph->tos;
- fib_params.l4_protocol = iph->protocol;
- fib_params.sport = 0;
- fib_params.dport = 0;
- fib_params.tot_len = bpf_ntohs(iph->tot_len);
- fib_params.ipv4_src = iph->saddr;
- fib_params.ipv4_dst = iph->daddr;
- } else if (h_proto == bpf_htons(ETH_P_IPV6)) {
- /* IPv6 part of the code */
- struct in6_addr *src = (struct in6_addr *) fib_params.ipv6_src;
- struct in6_addr *dst = (struct in6_addr *) fib_params.ipv6_dst;
-
- ip6h = data + nh_off;
- if (ip6h + 1 > data_end) {
- action = XDP_DROP;
- goto out;
- }
- /* as a real router, we need to check the TTL to prevent never ending loops*/
- if (ip6h->hop_limit <= 1)
- goto out;
-
- /* populate the fib_params fields to prepare for the lookup */
- fib_params.family = AF_INET6;
- fib_params.flowinfo = *(__be32 *) ip6h & IPV6_FLOWINFO_MASK;
- fib_params.l4_protocol = ip6h->nexthdr;
- fib_params.sport = 0;
- fib_params.dport = 0;
- fib_params.tot_len = bpf_ntohs(ip6h->payload_len);
- *src = ip6h->saddr;
- *dst = ip6h->daddr;
- } else {
- goto out;
- }
-
- fib_params.ifindex = ctx->ingress_ifindex;
-
- /* this is where the FIB lookup happens. If the lookup is successful */
- /* it will populate the fib_params.ifindex with the egress interface index */
-
- rc = bpf_fib_lookup(ctx, &fib_params, sizeof(fib_params), 0);
- switch (rc) {
- case BPF_FIB_LKUP_RET_SUCCESS: /* lookup successful */
- /* we are a router, so we need to decrease the ttl */
- if (h_proto == bpf_htons(ETH_P_IP))
- ip_decrease_ttl(iph);
- else if (h_proto == bpf_htons(ETH_P_IPV6))
- ip6h->hop_limit--;
- /* set the correct new source and destionation mac addresses */
- /* can be found in fib_params.dmac and fib_params.smac */
- memcpy(eth->h_dest, fib_params.dmac, ETH_ALEN);
- memcpy(eth->h_source, fib_params.smac, ETH_ALEN);
- /* and done, now we set the action to bpf_redirect_map with fib_params.ifindex which is the egress port as paramater */
- action = bpf_redirect_map(&tx_port, fib_params.ifindex, 0);
- break;
- case BPF_FIB_LKUP_RET_BLACKHOLE: /* dest is blackholed; can be dropped */
- case BPF_FIB_LKUP_RET_UNREACHABLE: /* dest is unreachable; can be dropped */
- case BPF_FIB_LKUP_RET_PROHIBIT: /* dest not allowed; can be dropped */
- action = XDP_DROP;
- break;
- case BPF_FIB_LKUP_RET_NOT_FWDED: /* packet is not forwarded */
- case BPF_FIB_LKUP_RET_FWD_DISABLED: /* fwding is not enabled on ingress */
- case BPF_FIB_LKUP_RET_UNSUPP_LWT: /* fwd requires encapsulation */
- case BPF_FIB_LKUP_RET_NO_NEIGH: /* no neighbor entry for nh */
- case BPF_FIB_LKUP_RET_FRAG_NEEDED: /* fragmentation required to fwd */
- /* PASS */
- break;
- }
-
-out:
- /* and done, update stats and return action */
- return xdp_stats_record_action(ctx, action);
-}
-
-SEC("xdp_pass")
-int xdp_pass_func(struct xdp_md *ctx)
-{
- return xdp_stats_record_action(ctx, XDP_PASS);
-}
-
-char _license[] SEC("license") = "GPL";
diff --git a/src/xdp/xdp_prog_user.c b/src/xdp/xdp_prog_user.c
deleted file mode 100644
index c47d2977d..000000000
--- a/src/xdp/xdp_prog_user.c
+++ /dev/null
@@ -1,182 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-
-static const char *__doc__ = "XDP redirect helper\n"
- " - Allows to populate/query tx_port and redirect_params maps\n";
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <errno.h>
-#include <getopt.h>
-#include <stdbool.h>
-
-#include <locale.h>
-#include <unistd.h>
-#include <time.h>
-
-#include <bpf/bpf.h>
-#include <bpf/libbpf.h>
-
-#include <net/if.h>
-#include <linux/if_ether.h>
-#include <linux/if_link.h> /* depend on kernel-headers installed */
-
-#include "common/common_params.h"
-#include "common/common_user_bpf_xdp.h"
-#include "common/common_libbpf.h"
-
-#include "common/xdp_stats_kern_user.h"
-
-static const struct option_wrapper long_options[] = {
-
- {{"help", no_argument, NULL, 'h' },
- "Show help", false},
-
- {{"dev", required_argument, NULL, 'd' },
- "Operate on device <ifname>", "<ifname>", true},
-
- {{"redirect-dev", required_argument, NULL, 'r' },
- "Redirect to device <ifname>", "<ifname>", true},
-
- {{"src-mac", required_argument, NULL, 'L' },
- "Source MAC address of <dev>", "<mac>", true },
-
- {{"dest-mac", required_argument, NULL, 'R' },
- "Destination MAC address of <redirect-dev>", "<mac>", true },
-
- {{"quiet", no_argument, NULL, 'q' },
- "Quiet mode (no output)"},
-
- {{0, 0, NULL, 0 }, NULL, false}
-};
-
-static int parse_u8(char *str, unsigned char *x)
-{
- unsigned long z;
-
- z = strtoul(str, 0, 16);
- if (z > 0xff)
- return -1;
-
- if (x)
- *x = z;
-
- return 0;
-}
-
-static int parse_mac(char *str, unsigned char mac[ETH_ALEN])
-{
- if (parse_u8(str, &mac[0]) < 0)
- return -1;
- if (parse_u8(str + 3, &mac[1]) < 0)
- return -1;
- if (parse_u8(str + 6, &mac[2]) < 0)
- return -1;
- if (parse_u8(str + 9, &mac[3]) < 0)
- return -1;
- if (parse_u8(str + 12, &mac[4]) < 0)
- return -1;
- if (parse_u8(str + 15, &mac[5]) < 0)
- return -1;
-
- return 0;
-}
-
-static int write_iface_params(int map_fd, unsigned char *src, unsigned char *dest)
-{
- if (bpf_map_update_elem(map_fd, src, dest, 0) < 0) {
- fprintf(stderr,
- "WARN: Failed to update bpf map file: err(%d):%s\n",
- errno, strerror(errno));
- return -1;
- }
-
- printf("forward: %02x:%02x:%02x:%02x:%02x:%02x -> %02x:%02x:%02x:%02x:%02x:%02x\n",
- src[0], src[1], src[2], src[3], src[4], src[5],
- dest[0], dest[1], dest[2], dest[3], dest[4], dest[5]
- );
-
- return 0;
-}
-
-#ifndef PATH_MAX
-#define PATH_MAX 4096
-#endif
-
-const char *pin_basedir = "/sys/fs/bpf";
-
-int main(int argc, char **argv)
-{
- int i;
- int len;
- int map_fd;
- bool redirect_map;
- char pin_dir[PATH_MAX];
- unsigned char src[ETH_ALEN];
- unsigned char dest[ETH_ALEN];
-
- struct config cfg = {
- .ifindex = -1,
- .redirect_ifindex = -1,
- };
-
- /* Cmdline options can change progsec */
- parse_cmdline_args(argc, argv, long_options, &cfg, __doc__);
-
- redirect_map = (cfg.ifindex > 0) && (cfg.redirect_ifindex > 0);
-
- if (cfg.redirect_ifindex > 0 && cfg.ifindex == -1) {
- fprintf(stderr, "ERR: required option --dev missing\n\n");
- usage(argv[0], __doc__, long_options, (argc == 1));
- return EXIT_FAIL_OPTION;
- }
-
- len = snprintf(pin_dir, PATH_MAX, "%s/%s", pin_basedir, cfg.ifname);
- if (len < 0) {
- fprintf(stderr, "ERR: creating pin dirname\n");
- return EXIT_FAIL_OPTION;
- }
-
- if (parse_mac(cfg.src_mac, src) < 0) {
- fprintf(stderr, "ERR: can't parse mac address %s\n", cfg.src_mac);
- return EXIT_FAIL_OPTION;
- }
-
- if (parse_mac(cfg.dest_mac, dest) < 0) {
- fprintf(stderr, "ERR: can't parse mac address %s\n", cfg.dest_mac);
- return EXIT_FAIL_OPTION;
- }
-
- /* Open the tx_port map corresponding to the cfg.ifname interface */
- map_fd = open_bpf_map_file(pin_dir, "tx_port", NULL);
- if (map_fd < 0) {
- return EXIT_FAIL_BPF;
- }
-
- printf("map dir: %s\n", pin_dir);
-
- if (redirect_map) {
- /* setup a virtual port for the static redirect */
- i = 0;
- bpf_map_update_elem(map_fd, &i, &cfg.redirect_ifindex, 0);
- printf("redirect from ifnum=%d to ifnum=%d\n", cfg.ifindex, cfg.redirect_ifindex);
-
- /* Open the redirect_params map */
- map_fd = open_bpf_map_file(pin_dir, "redirect_params", NULL);
- if (map_fd < 0) {
- return EXIT_FAIL_BPF;
- }
-
- /* Setup the mapping containing MAC addresses */
- if (write_iface_params(map_fd, src, dest) < 0) {
- fprintf(stderr, "can't write iface params\n");
- return 1;
- }
- } else {
- /* setup 1-1 mapping for the dynamic router */
- for (i = 1; i < 256; ++i)
- bpf_map_update_elem(map_fd, &i, &i, 0);
- }
-
- return EXIT_OK;
-}