diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2021-08-31 16:43:06 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-08-31 16:43:06 -0700 |
| commit | 9e9fb7655ed585da8f468e29221f0ba194a5f613 (patch) | |
| tree | d2c51887389b8297635a5b90d5766897f00fe928 /samples | |
| parent | 86ac54e79fe09b34c52691a780a6e31d12fa57f4 (diff) | |
| parent | 29ce8f9701072fc221d9c38ad952de1a9578f95c (diff) | |
| download | linux-9e9fb7655ed585da8f468e29221f0ba194a5f613.tar.gz | |
Merge tag 'net-next-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
Pull networking updates from Jakub Kicinski:
"Core:
- Enable memcg accounting for various networking objects.
BPF:
- Introduce bpf timers.
- Add perf link and opaque bpf_cookie which the program can read out
again, to be used in libbpf-based USDT library.
- Add bpf_task_pt_regs() helper to access user space pt_regs in
kprobes, to help user space stack unwinding.
- Add support for UNIX sockets for BPF sockmap.
- Extend BPF iterator support for UNIX domain sockets.
- Allow BPF TCP congestion control progs and bpf iterators to call
bpf_setsockopt(), e.g. to switch to another congestion control
algorithm.
Protocols:
- Support IOAM Pre-allocated Trace with IPv6.
- Support Management Component Transport Protocol.
- bridge: multicast: add vlan support.
- netfilter: add hooks for the SRv6 lightweight tunnel driver.
- tcp:
- enable mid-stream window clamping (by user space or BPF)
- allow data-less, empty-cookie SYN with TFO_SERVER_COOKIE_NOT_REQD
- more accurate DSACK processing for RACK-TLP
- mptcp:
- add full mesh path manager option
- add partial support for MP_FAIL
- improve use of backup subflows
- optimize option processing
- af_unix: add OOB notification support.
- ipv6: add IFLA_INET6_RA_MTU to expose MTU value advertised by the
router.
- mac80211: Target Wake Time support in AP mode.
- can: j1939: extend UAPI to notify about RX status.
Driver APIs:
- Add page frag support in page pool API.
- Many improvements to the DSA (distributed switch) APIs.
- ethtool: extend IRQ coalesce uAPI with timer reset modes.
- devlink: control which auxiliary devices are created.
- Support CAN PHYs via the generic PHY subsystem.
- Proper cross-chip support for tag_8021q.
- Allow TX forwarding for the software bridge data path to be
offloaded to capable devices.
Drivers:
- veth: more flexible channels number configuration.
- openvswitch: introduce per-cpu upcall dispatch.
- Add internet mix (IMIX) mode to pktgen.
- Transparently handle XDP operations in the bonding driver.
- Add LiteETH network driver.
- Renesas (ravb):
- support Gigabit Ethernet IP
- NXP Ethernet switch (sja1105):
- fast aging support
- support for "H" switch topologies
- traffic termination for ports under VLAN-aware bridge
- Intel 1G Ethernet
- support getcrosststamp() with PCIe PTM (Precision Time
Measurement) for better time sync
- support Credit-Based Shaper (CBS) offload, enabling HW traffic
prioritization and bandwidth reservation
- Broadcom Ethernet (bnxt)
- support pulse-per-second output
- support larger Rx rings
- Mellanox Ethernet (mlx5)
- support ethtool RSS contexts and MQPRIO channel mode
- support LAG offload with bridging
- support devlink rate limit API
- support packet sampling on tunnels
- Huawei Ethernet (hns3):
- basic devlink support
- add extended IRQ coalescing support
- report extended link state
- Netronome Ethernet (nfp):
- add conntrack offload support
- Broadcom WiFi (brcmfmac):
- add WPA3 Personal with FT to supported cipher suites
- support 43752 SDIO device
- Intel WiFi (iwlwifi):
- support scanning hidden 6GHz networks
- support for a new hardware family (Bz)
- Xen pv driver:
- harden netfront against malicious backends
- Qualcomm mobile
- ipa: refactor power management and enable automatic suspend
- mhi: move MBIM to WWAN subsystem interfaces
Refactor:
- Ambient BPF run context and cgroup storage cleanup.
- Compat rework for ndo_ioctl.
Old code removal:
- prism54 remove the obsoleted driver, deprecated by the p54 driver.
- wan: remove sbni/granch driver"
* tag 'net-next-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1715 commits)
net: Add depends on OF_NET for LiteX's LiteETH
ipv6: seg6: remove duplicated include
net: hns3: remove unnecessary spaces
net: hns3: add some required spaces
net: hns3: clean up a type mismatch warning
net: hns3: refine function hns3_set_default_feature()
ipv6: remove duplicated 'net/lwtunnel.h' include
net: w5100: check return value after calling platform_get_resource()
net/mlxbf_gige: Make use of devm_platform_ioremap_resourcexxx()
net: mdio: mscc-miim: Make use of the helper function devm_platform_ioremap_resource()
net: mdio-ipq4019: Make use of devm_platform_ioremap_resource()
fou: remove sparse errors
ipv4: fix endianness issue in inet_rtm_getroute_build_skb()
octeontx2-af: Set proper errorcode for IPv4 checksum errors
octeontx2-af: Fix static code analyzer reported issues
octeontx2-af: Fix mailbox errors in nix_rss_flowkey_cfg
octeontx2-af: Fix loop in free and unmap counter
af_unix: fix potential NULL deref in unix_dgram_connect()
dpaa2-eth: Replace strlcpy with strscpy
octeontx2-af: Use NDC TX for transmit packet data
...
Diffstat (limited to 'samples')
37 files changed, 3460 insertions, 2906 deletions
diff --git a/samples/bpf/.gitignore b/samples/bpf/.gitignore index 0b9548ea8477..fcba217f0ae2 100644 --- a/samples/bpf/.gitignore +++ b/samples/bpf/.gitignore @@ -45,11 +45,13 @@ xdp_monitor xdp_redirect xdp_redirect_cpu xdp_redirect_map +xdp_redirect_map_multi xdp_router_ipv4 xdp_rxq_info xdp_sample_pkts xdp_tx_iptunnel xdpsock +xdpsock_ctrl_proc xsk_fwd testfile.img hbm_out.log diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile index 036998d11ded..4dc20be5fb96 100644 --- a/samples/bpf/Makefile +++ b/samples/bpf/Makefile @@ -39,11 +39,6 @@ tprogs-y += lwt_len_hist tprogs-y += xdp_tx_iptunnel tprogs-y += test_map_in_map tprogs-y += per_socket_stats_example -tprogs-y += xdp_redirect -tprogs-y += xdp_redirect_map -tprogs-y += xdp_redirect_map_multi -tprogs-y += xdp_redirect_cpu -tprogs-y += xdp_monitor tprogs-y += xdp_rxq_info tprogs-y += syscall_tp tprogs-y += cpustat @@ -57,11 +52,18 @@ tprogs-y += xdp_sample_pkts tprogs-y += ibumad tprogs-y += hbm +tprogs-y += xdp_redirect_cpu +tprogs-y += xdp_redirect_map_multi +tprogs-y += xdp_redirect_map +tprogs-y += xdp_redirect +tprogs-y += xdp_monitor + # Libbpf dependencies LIBBPF = $(TOOLS_PATH)/lib/bpf/libbpf.a CGROUP_HELPERS := ../../tools/testing/selftests/bpf/cgroup_helpers.o TRACE_HELPERS := ../../tools/testing/selftests/bpf/trace_helpers.o +XDP_SAMPLE := xdp_sample_user.o fds_example-objs := fds_example.o sockex1-objs := sockex1_user.o @@ -98,11 +100,6 @@ lwt_len_hist-objs := lwt_len_hist_user.o xdp_tx_iptunnel-objs := xdp_tx_iptunnel_user.o test_map_in_map-objs := test_map_in_map_user.o per_socket_stats_example-objs := cookie_uid_helper_example.o -xdp_redirect-objs := xdp_redirect_user.o -xdp_redirect_map-objs := xdp_redirect_map_user.o -xdp_redirect_map_multi-objs := xdp_redirect_map_multi_user.o -xdp_redirect_cpu-objs := xdp_redirect_cpu_user.o -xdp_monitor-objs := xdp_monitor_user.o xdp_rxq_info-objs := xdp_rxq_info_user.o syscall_tp-objs := syscall_tp_user.o cpustat-objs := cpustat_user.o @@ -116,6 +113,12 @@ xdp_sample_pkts-objs := xdp_sample_pkts_user.o ibumad-objs := ibumad_user.o hbm-objs := hbm.o $(CGROUP_HELPERS) +xdp_redirect_map_multi-objs := xdp_redirect_map_multi_user.o $(XDP_SAMPLE) +xdp_redirect_cpu-objs := xdp_redirect_cpu_user.o $(XDP_SAMPLE) +xdp_redirect_map-objs := xdp_redirect_map_user.o $(XDP_SAMPLE) +xdp_redirect-objs := xdp_redirect_user.o $(XDP_SAMPLE) +xdp_monitor-objs := xdp_monitor_user.o $(XDP_SAMPLE) + # Tell kbuild to always build the programs always-y := $(tprogs-y) always-y += sockex1_kern.o @@ -160,11 +163,6 @@ always-y += tcp_clamp_kern.o always-y += tcp_basertt_kern.o always-y += tcp_tos_reflect_kern.o always-y += tcp_dumpstats_kern.o -always-y += xdp_redirect_kern.o -always-y += xdp_redirect_map_kern.o -always-y += xdp_redirect_map_multi_kern.o -always-y += xdp_redirect_cpu_kern.o -always-y += xdp_monitor_kern.o always-y += xdp_rxq_info_kern.o always-y += xdp2skb_meta_kern.o always-y += syscall_tp_kern.o @@ -276,6 +274,11 @@ $(LIBBPF): FORCE $(MAKE) -C $(dir $@) RM='rm -rf' EXTRA_CFLAGS="$(TPROGS_CFLAGS)" \ LDFLAGS=$(TPROGS_LDFLAGS) srctree=$(BPF_SAMPLES_PATH)/../../ O= +BPFTOOLDIR := $(TOOLS_PATH)/bpf/bpftool +BPFTOOL := $(BPFTOOLDIR)/bpftool +$(BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile) + $(MAKE) -C $(BPFTOOLDIR) srctree=$(BPF_SAMPLES_PATH)/../../ + $(obj)/syscall_nrs.h: $(obj)/syscall_nrs.s FORCE $(call filechk,offsets,__SYSCALL_NRS_H__) @@ -306,6 +309,12 @@ verify_target_bpf: verify_cmds $(BPF_SAMPLES_PATH)/*.c: verify_target_bpf $(LIBBPF) $(src)/*.c: verify_target_bpf $(LIBBPF) +$(obj)/xdp_redirect_cpu_user.o: $(obj)/xdp_redirect_cpu.skel.h +$(obj)/xdp_redirect_map_multi_user.o: $(obj)/xdp_redirect_map_multi.skel.h +$(obj)/xdp_redirect_map_user.o: $(obj)/xdp_redirect_map.skel.h +$(obj)/xdp_redirect_user.o: $(obj)/xdp_redirect.skel.h +$(obj)/xdp_monitor_user.o: $(obj)/xdp_monitor.skel.h + $(obj)/tracex5_kern.o: $(obj)/syscall_nrs.h $(obj)/hbm_out_kern.o: $(src)/hbm.h $(src)/hbm_kern.h $(obj)/hbm.o: $(src)/hbm.h @@ -313,6 +322,76 @@ $(obj)/hbm_edt_kern.o: $(src)/hbm.h $(src)/hbm_kern.h -include $(BPF_SAMPLES_PATH)/Makefile.target +VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux) \ + $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux) \ + ../../../../vmlinux \ + /sys/kernel/btf/vmlinux \ + /boot/vmlinux-$(shell uname -r) +VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS)))) + +ifeq ($(VMLINUX_BTF),) +$(error Cannot find a vmlinux for VMLINUX_BTF at any of "$(VMLINUX_BTF_PATHS)") +endif + +$(obj)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) +ifeq ($(VMLINUX_H),) + $(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF) format c > $@ +else + $(Q)cp "$(VMLINUX_H)" $@ +endif + +clean-files += vmlinux.h + +# Get Clang's default includes on this system, as opposed to those seen by +# '-target bpf'. This fixes "missing" files on some architectures/distros, +# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc. +# +# Use '-idirafter': Don't interfere with include mechanics except where the +# build would have failed anyways. +define get_sys_includes +$(shell $(1) -v -E - </dev/null 2>&1 \ + | sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \ +$(shell $(1) -dM -E - </dev/null | grep '#define __riscv_xlen ' | sed 's/#define /-D/' | sed 's/ /=/') +endef + +CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG)) + +$(obj)/xdp_redirect_cpu.bpf.o: $(obj)/xdp_sample.bpf.o +$(obj)/xdp_redirect_map_multi.bpf.o: $(obj)/xdp_sample.bpf.o +$(obj)/xdp_redirect_map.bpf.o: $(obj)/xdp_sample.bpf.o +$(obj)/xdp_redirect.bpf.o: $(obj)/xdp_sample.bpf.o +$(obj)/xdp_monitor.bpf.o: $(obj)/xdp_sample.bpf.o + +$(obj)/%.bpf.o: $(src)/%.bpf.c $(obj)/vmlinux.h $(src)/xdp_sample.bpf.h $(src)/xdp_sample_shared.h + @echo " CLANG-BPF " $@ + $(Q)$(CLANG) -g -O2 -target bpf -D__TARGET_ARCH_$(SRCARCH) \ + -Wno-compare-distinct-pointer-types -I$(srctree)/include \ + -I$(srctree)/samples/bpf -I$(srctree)/tools/include \ + -I$(srctree)/tools/lib $(CLANG_SYS_INCLUDES) \ + -c $(filter %.bpf.c,$^) -o $@ + +LINKED_SKELS := xdp_redirect_cpu.skel.h xdp_redirect_map_multi.skel.h \ + xdp_redirect_map.skel.h xdp_redirect.skel.h xdp_monitor.skel.h +clean-files += $(LINKED_SKELS) + +xdp_redirect_cpu.skel.h-deps := xdp_redirect_cpu.bpf.o xdp_sample.bpf.o +xdp_redirect_map_multi.skel.h-deps := xdp_redirect_map_multi.bpf.o xdp_sample.bpf.o +xdp_redirect_map.skel.h-deps := xdp_redirect_map.bpf.o xdp_sample.bpf.o +xdp_redirect.skel.h-deps := xdp_redirect.bpf.o xdp_sample.bpf.o +xdp_monitor.skel.h-deps := xdp_monitor.bpf.o xdp_sample.bpf.o + +LINKED_BPF_SRCS := $(patsubst %.bpf.o,%.bpf.c,$(foreach skel,$(LINKED_SKELS),$($(skel)-deps))) + +BPF_SRCS_LINKED := $(notdir $(wildcard $(src)/*.bpf.c)) +BPF_OBJS_LINKED := $(patsubst %.bpf.c,$(obj)/%.bpf.o, $(BPF_SRCS_LINKED)) +BPF_SKELS_LINKED := $(addprefix $(obj)/,$(LINKED_SKELS)) + +$(BPF_SKELS_LINKED): $(BPF_OBJS_LINKED) $(BPFTOOL) + @echo " BPF GEN-OBJ " $(@:.skel.h=) + $(Q)$(BPFTOOL) gen object $(@:.skel.h=.lbpf.o) $(addprefix $(obj)/,$($(@F)-deps)) + @echo " BPF GEN-SKEL" $(@:.skel.h=) + $(Q)$(BPFTOOL) gen skeleton $(@:.skel.h=.lbpf.o) name $(notdir $(@:.skel.h=)) > $@ + # asm/sysreg.h - inline assembly used by it is incompatible with llvm. # But, there is no easy way to fix it, so just exclude it since it is # useless for BPF samples. diff --git a/samples/bpf/Makefile.target b/samples/bpf/Makefile.target index 7621f55e2947..5a368affa038 100644 --- a/samples/bpf/Makefile.target +++ b/samples/bpf/Makefile.target @@ -73,3 +73,14 @@ quiet_cmd_tprog-cobjs = CC $@ cmd_tprog-cobjs = $(CC) $(tprogc_flags) -c -o $@ $< $(tprog-cobjs): $(obj)/%.o: $(src)/%.c FORCE $(call if_changed_dep,tprog-cobjs) + +# Override includes for xdp_sample_user.o because $(srctree)/usr/include in +# TPROGS_CFLAGS causes conflicts +XDP_SAMPLE_CFLAGS += -Wall -O2 -lm \ + -I./tools/include \ + -I./tools/include/uapi \ + -I./tools/lib \ + -I./tools/testing/selftests/bpf +$(obj)/xdp_sample_user.o: $(src)/xdp_sample_user.c \ + $(src)/xdp_sample_user.h $(src)/xdp_sample_shared.h + $(CC) $(XDP_SAMPLE_CFLAGS) -c -o $@ $< diff --git a/samples/bpf/cookie_uid_helper_example.c b/samples/bpf/cookie_uid_helper_example.c index cc3bce8d3aac..54958802c032 100644 --- a/samples/bpf/cookie_uid_helper_example.c +++ b/samples/bpf/cookie_uid_helper_example.c @@ -167,7 +167,7 @@ static void prog_load(void) static void prog_attach_iptables(char *file) { int ret; - char rules[100]; + char rules[256]; if (bpf_obj_pin(prog_fd, file)) error(1, errno, "bpf_obj_pin"); @@ -175,8 +175,13 @@ static void prog_attach_iptables(char *file) printf("file path too long: %s\n", file); exit(1); } - sprintf(rules, "iptables -A OUTPUT -m bpf --object-pinned %s -j ACCEPT", - file); + ret = snprintf(rules, sizeof(rules), + "iptables -A OUTPUT -m bpf --object-pinned %s -j ACCEPT", + file); + if (ret < 0 || ret >= sizeof(rules)) { + printf("error constructing iptables command\n"); + exit(1); + } ret = system(rules); if (ret < 0) { printf("iptables rule update failed: %d/n", WEXITSTATUS(ret)); diff --git a/samples/bpf/offwaketime_kern.c b/samples/bpf/offwaketime_kern.c index 14b792915a9c..4866afd054da 100644 --- a/samples/bpf/offwaketime_kern.c +++ b/samples/bpf/offwaketime_kern.c @@ -20,6 +20,7 @@ }) #define MINBLOCK_US 1 +#define MAX_ENTRIES 10000 struct key_t { char waker[TASK_COMM_LEN]; @@ -32,14 +33,14 @@ struct { __uint(type, BPF_MAP_TYPE_HASH); __type(key, struct key_t); __type(value, u64); - __uint(max_entries, 10000); + __uint(max_entries, MAX_ENTRIES); } counts SEC(".maps"); struct { __uint(type, BPF_MAP_TYPE_HASH); __type(key, u32); __type(value, u64); - __uint(max_entries, 10000); + __uint(max_entries, MAX_ENTRIES); } start SEC(".maps"); struct wokeby_t { @@ -51,14 +52,14 @@ struct { __uint(type, BPF_MAP_TYPE_HASH); __type(key, u32); __type(value, struct wokeby_t); - __uint(max_entries, 10000); + __uint(max_entries, MAX_ENTRIES); } wokeby SEC(".maps"); struct { __uint(type, BPF_MAP_TYPE_STACK_TRACE); __uint(key_size, sizeof(u32)); __uint(value_size, PERF_MAX_STACK_DEPTH * sizeof(u64)); - __uint(max_entries, 10000); + __uint(max_entries, MAX_ENTRIES); } stackmap SEC(".maps"); #define STACKID_FLAGS (0 | BPF_F_FAST_STACK_CMP) diff --git a/samples/bpf/test_override_return.sh b/samples/bpf/test_override_return.sh index e68b9ee6814b..35db26f736b9 100755 --- a/samples/bpf/test_override_return.sh +++ b/samples/bpf/test_override_return.sh @@ -1,5 +1,6 @@ #!/bin/bash +rm -r tmpmnt rm -f testfile.img dd if=/dev/zero of=testfile.img bs=1M seek=1000 count=1 DEVICE=$(losetup --show -f testfile.img) diff --git a/samples/bpf/tracex4_user.c b/samples/bpf/tracex4_user.c index cea399424bca..566e6440e8c2 100644 --- a/samples/bpf/tracex4_user.c +++ b/samples/bpf/tracex4_user.c @@ -32,7 +32,7 @@ static void print_old_objects(int fd) __u64 key, next_key; struct pair v; - key = write(1, "\e[1;1H\e[2J", 12); /* clear screen */ + key = write(1, "\e[1;1H\e[2J", 11); /* clear screen */ key = -1; while (bpf_map_get_next_key(fd, &key, &next_key) == 0) { diff --git a/samples/bpf/tracex7_user.c b/samples/bpf/tracex7_user.c index fdcd6580dd73..8be7ce18d3ba 100644 --- a/samples/bpf/tracex7_user.c +++ b/samples/bpf/tracex7_user.c @@ -14,6 +14,11 @@ int main(int argc, char **argv) int ret = 0; FILE *f; + if (!argv[1]) { + fprintf(stderr, "ERROR: Run with the btrfs device argument!\n"); + return 0; + } + snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); obj = bpf_object__open_file(filename, NULL); if (libbpf_get_error(obj)) { diff --git a/samples/bpf/xdp1_kern.c b/samples/bpf/xdp1_kern.c index 34b64394ed9c..f0c5d95084de 100644 --- a/samples/bpf/xdp1_kern.c +++ b/samples/bpf/xdp1_kern.c @@ -57,6 +57,7 @@ int xdp_prog1(struct xdp_md *ctx) h_proto = eth->h_proto; + /* Handle VLAN tagged packet */ if (h_proto == htons(ETH_P_8021Q) || h_proto == htons(ETH_P_8021AD)) { struct vlan_hdr *vhdr; @@ -66,6 +67,7 @@ int xdp_prog1(struct xdp_md *ctx) return rc; h_proto = vhdr->h_vlan_encapsulated_proto; } + /* Handle double VLAN tagged packet */ if (h_proto == htons(ETH_P_8021Q) || h_proto == htons(ETH_P_8021AD)) { struct vlan_hdr *vhdr; diff --git a/samples/bpf/xdp2_kern.c b/samples/bpf/xdp2_kern.c index c787f4b49646..d8a64ab077b0 100644 --- a/samples/bpf/xdp2_kern.c +++ b/samples/bpf/xdp2_kern.c @@ -73,6 +73,7 @@ int xdp_prog1(struct xdp_md *ctx) h_proto = eth->h_proto; + /* Handle VLAN tagged packet */ if (h_proto == htons(ETH_P_8021Q) || h_proto == htons(ETH_P_8021AD)) { struct vlan_hdr *vhdr; @@ -82,6 +83,7 @@ int xdp_prog1(struct xdp_md *ctx) return rc; h_proto = vhdr->h_vlan_encapsulated_proto; } + /* Handle double VLAN tagged packet */ if (h_proto == htons(ETH_P_8021Q) || h_proto == htons(ETH_P_8021AD)) { struct vlan_hdr *vhdr; diff --git a/samples/bpf/xdp_monitor.bpf.c b/samples/bpf/xdp_monitor.bpf.c new file mode 100644 index 000000000000..cfb41e2205f4 --- /dev/null +++ b/samples/bpf/xdp_monitor.bpf.c @@ -0,0 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright(c) 2017-2018 Jesper Dangaard Brouer, Red Hat Inc. + * + * XDP monitor tool, based on tracepoints + */ +#include "xdp_sample.bpf.h" + +char _license[] SEC("license") = "GPL"; diff --git a/samples/bpf/xdp_monitor_kern.c b/samples/bpf/xdp_monitor_kern.c deleted file mode 100644 index 5c955b812c47..000000000000 --- a/samples/bpf/xdp_monitor_kern.c +++ /dev/null @@ -1,257 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 - * Copyright(c) 2017-2018 Jesper Dangaard Brouer, Red Hat Inc. - * - * XDP monitor tool, based on tracepoints - */ -#include <uapi/linux/bpf.h> -#include <bpf/bpf_helpers.h> - -struct { - __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY); - __type(key, u32); - __type(value, u64); - __uint(max_entries, 2); - /* TODO: have entries for all possible errno's */ -} redirect_err_cnt SEC(".maps"); - -#define XDP_UNKNOWN XDP_REDIRECT + 1 -struct { - __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY); - __type(key, u32); - __type(value, u64); - __uint(max_entries, XDP_UNKNOWN + 1); -} exception_cnt SEC(".maps"); - -/* Tracepoint format: /sys/kernel/debug/tracing/events/xdp/xdp_redirect/format - * Code in: kernel/include/trace/events/xdp.h - */ -struct xdp_redirect_ctx { - u64 __pad; // First 8 bytes are not accessible by bpf code - int prog_id; // offset:8; size:4; signed:1; - u32 act; // offset:12 size:4; signed:0; - int ifindex; // offset:16 size:4; signed:1; - int err; // offset:20 size:4; signed:1; - int to_ifindex; // offset:24 size:4; signed:1; - u32 map_id; // offset:28 size:4; signed:0; - int map_index; // offset:32 size:4; signed:1; -}; // offset:36 - -enum { - XDP_REDIRECT_SUCCESS = 0, - XDP_REDIRECT_ERROR = 1 -}; - -static __always_inline -int xdp_redirect_collect_stat(struct xdp_redirect_ctx *ctx) -{ - u32 key = XDP_REDIRECT_ERROR; - int err = ctx->err; - u64 *cnt; - - if (!err) - key = XDP_REDIRECT_SUCCESS; - - cnt = bpf_map_lookup_elem(&redirect_err_cnt, &key); - if (!cnt) - return 1; - *cnt += 1; - - return 0; /* Indicate event was filtered (no further processing)*/ - /* - * Returning 1 here would allow e.g. a perf-record tracepoint - * to see and record these events, but it doesn't work well - * in-practice as stopping perf-record also unload this - * bpf_prog. Plus, there is additional overhead of doing so. - */ -} - -SEC("tracepoint/xdp/xdp_redirect_err") -int trace_xdp_redirect_err(struct xdp_redirect_ctx *ctx) -{ - return xdp_redirect_collect_stat(ctx); -} - - -SEC("tracepoint/xdp/xdp_redirect_map_err") -int trace_xdp_redirect_map_err(struct xdp_redirect_ctx *ctx) -{ - return xdp_redirect_collect_stat(ctx); -} - -/* Likely unloaded when prog starts */ -SEC("tracepoint/xdp/xdp_redirect") -int trace_xdp_redirect(struct xdp_redirect_ctx *ctx) -{ - return xdp_redirect_collect_stat(ctx); -} - -/* Likely unloaded when prog starts */ -SEC("tracepoint/xdp/xdp_redirect_map") -int trace_xdp_redirect_map(struct xdp_redirect_ctx *ctx) -{ - return xdp_redirect_collect_stat(ctx); -} - -/* Tracepoint format: /sys/kernel/debug/tracing/events/xdp/xdp_exception/format - * Code in: kernel/include/trace/events/xdp.h - */ -struct xdp_exception_ctx { - u64 __pad; // First 8 bytes are not accessible by bpf code - int prog_id; // offset:8; size:4; signed:1; - u32 act; // offset:12; size:4; signed:0; - int ifindex; // offset:16; size:4; signed:1; -}; - -SEC("tracepoint/xdp/xdp_exception") -int trace_xdp_exception(struct xdp_exception_ctx *ctx) -{ - u64 *cnt; - u32 key; - - key = ctx->act; - if (key > XDP_REDIRECT) - key = XDP_UNKNOWN; - - cnt = bpf_map_lookup_elem(&exception_cnt, &key); - if (!cnt) - return 1; - *cnt += 1; - - return 0; -} - -/* Common stats data record shared with _user.c */ -struct datarec { - u64 processed; - u64 dropped; - u64 info; - u64 err; -}; -#define MAX_CPUS 64 - -struct { - __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY); - __type(key, u32); - __type(value, struct datarec); - __uint(max_entries, MAX_CPUS); -} cpumap_enqueue_cnt SEC(".maps"); - -struct { - __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY); - __type(key, u32); - __type(value, struct datarec); - __uint(max_entries, 1); -} cpumap_kthread_cnt SEC(".maps"); - -/* Tracepoint: /sys/kernel/debug/tracing/events/xdp/xdp_cpumap_enqueue/format - * Code in: kernel/include/trace/events/xdp.h - */ -struct cpumap_enqueue_ctx { - u64 __pad; // First 8 bytes are not accessible by bpf code - int map_id; // offset:8; size:4; signed:1; - u32 act; // offset:12; size:4; signed:0; - int cpu; // offset:16; size:4; signed:1; - unsigned int drops; // offset:20; size:4; signed:0; - unsigned int processed; // offset:24; size:4; signed:0; - int to_cpu; // offset:28; size:4; signed:1; -}; - -SEC("tracepoint/xdp/xdp_cpumap_enqueue") -int trace_xdp_cpumap_enqueue(struct cpumap_enqueue_ctx *ctx) -{ - u32 to_cpu = ctx->to_cpu; - struct datarec *rec; - - if (to_cpu >= MAX_CPUS) - return 1; - - rec = bpf_map_lookup_elem(&cpumap_enqueue_cnt, &to_cpu); - if (!rec) - return 0; - rec->processed += ctx->processed; - rec->dropped += ctx->drops; - - /* Record bulk events, then userspace can calc average bulk size */ - if (ctx->processed > 0) - rec->info += 1; - - return 0; -} - -/* Tracepoint: /sys/kernel/debug/tracing/events/xdp/xdp_cpumap_kthread/format - * Code in: kernel/include/trace/events/xdp.h - */ -struct cpumap_kthread_ctx { - u64 __pad; // First 8 bytes are not accessible by bpf code - int map_id; // offset:8; size:4; signed:1; - u32 act; // offset:12; size:4; signed:0; - int cpu; // offset:16; size:4; signed:1; - unsigned int drops; // offset:20; size:4; signed:0; - unsigned int processed; // offset:24; size:4; signed:0; - int sched; // offset:28; size:4; signed:1; -}; - -SEC("tracepoint/xdp/xdp_cpumap_kthread") -int trace_xdp_cpumap_kthread(struct cpumap_kthread_ctx *ctx) -{ - struct datarec *rec; - u32 key = 0; - - rec = bpf_map_lookup_elem(&cpumap_kthread_cnt, &key); - if (!rec) - return 0; - rec->processed += ctx->processed; - rec->dropped += ctx->drops; - - /* Count times kthread yielded CPU via schedule call */ - if (ctx->sched) - rec->info++; - - return 0; -} - -struct { - __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY); - __type(key, u32); - __type(value, struct datarec); - __uint(max_entries, 1); -} devmap_xmit_cnt SEC(".maps"); - -/* Tracepoint: /sys/kernel/debug/tracing/events/xdp/xdp_devmap_xmit/format - * Code in: kernel/include/trace/events/xdp.h - */ -struct devmap_xmit_ctx { - u64 __pad; // First 8 bytes are not accessible by bpf code - int from_ifindex; // offset:8; size:4; signed:1; - u32 act; // offset:12; size:4; signed:0; - int to_ifindex; // offset:16; size:4; signed:1; - int drops; // offset:20; size:4; signed:1; - int sent; // offset:24; size:4; signed:1; - int err; // offset:28; size:4; signed:1; -}; - -SEC("tracepoint/xdp/xdp_devmap_xmit") -int trace_xdp_devmap_xmit(struct devmap_xmit_ctx *ctx) -{ - struct datarec *rec; - u32 key = 0; - - rec = bpf_map_lookup_elem(&devmap_xmit_cnt, &key); - if (!rec) - return 0; - rec->processed += ctx->sent; - rec->dropped += ctx->drops; - - /* Record bulk events, then userspace can calc average bulk size */ - rec->info += 1; - - /* Record error cases, where no frame were sent */ - if (ctx->err) - rec->err++; - - /* Catch API error of drv ndo_xdp_xmit sent more than count */ - if (ctx->drops < 0) - rec->err++; - - return 1; -} diff --git a/samples/bpf/xdp_monitor_user.c b/samples/bpf/xdp_monitor_user.c index 49ebc49aefc3..fb9391a5ec62 100644 --- a/samples/bpf/xdp_monitor_user.c +++ b/samples/bpf/xdp_monitor_user.c @@ -1,15 +1,12 @@ -/* SPDX-License-Identifier: GPL-2.0 - * Copyright(c) 2017 Jesper Dangaard Brouer, Red Hat, Inc. - */ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright(c) 2017 Jesper Dangaard Brouer, Red Hat, Inc. */ static const char *__doc__= - "XDP monitor tool, based on tracepoints\n" -; +"XDP monitor tool, based on tracepoints\n"; static const char *__doc_err_only__= - " NOTICE: Only tracking XDP redirect errors\n" - " Enable TX success stats via '--stats'\n" - " (which comes with a per packet processing overhead)\n" -; +" NOTICE: Only tracking XDP redirect errors\n" +" Enable redirect success stats via '-s/--stats'\n" +" (which comes with a per packet processing overhead)\n"; #include <errno.h> #include <stdio.h> @@ -20,768 +17,103 @@ static const char *__doc_err_only__= #include <ctype.h> #include <unistd.h> #include <locale.h> - #include <sys/resource.h> #include <getopt.h> #include <net/if.h> #include <time.h> - #include <signal.h> #include <bpf/bpf.h> #include <bpf/libbpf.h> #include "bpf_util.h" +#include "xdp_sample_user.h" +#include "xdp_monitor.skel.h" -enum map_type { - REDIRECT_ERR_CNT, - EXCEPTION_CNT, - CPUMAP_ENQUEUE_CNT, - CPUMAP_KTHREAD_CNT, - DEVMAP_XMIT_CNT, -}; +static int mask = SAMPLE_REDIRECT_ERR_CNT | SAMPLE_CPUMAP_ENQUEUE_CNT | + SAMPLE_CPUMAP_KTHREAD_CNT | SAMPLE_EXCEPTION_CNT | + SAMPLE_DEVMAP_XMIT_CNT | SAMPLE_DEVMAP_XMIT_CNT_MULTI; -static const char *const map_type_strings[] = { - [REDIRECT_ERR_CNT] = "redirect_err_cnt", - [EXCEPTION_CNT] = "exception_cnt", - [CPUMAP_ENQUEUE_CNT] = "cpumap_enqueue_cnt", - [CPUMAP_KTHREAD_CNT] = "cpumap_kthread_cnt", - [DEVMAP_XMIT_CNT] = "devmap_xmit_cnt", -}; - -#define NUM_MAP 5 -#define NUM_TP 8 - -static int tp_cnt; -static int map_cnt; -static int verbose = 1; -static bool debug = false; -struct bpf_map *map_data[NUM_MAP] = {}; -struct bpf_link *tp_links[NUM_TP] = {}; -struct bpf_object *obj; +DEFINE_SAMPLE_INIT(xdp_monitor); static const struct option long_options[] = { - {"help", no_argument, NULL, 'h' }, - {"debug", no_argument, NULL, 'D' }, - {"stats", no_argument, NULL, 'S' }, - {"sec", required_argument, NULL, 's' }, - {0, 0, NULL, 0 } -}; - -static void int_exit(int sig) -{ - /* Detach tracepoints */ - while (tp_cnt) - bpf_link__destroy(tp_links[--tp_cnt]); - - bpf_object__close(obj); - exit(0); -} - -/* C standard specifies two constants, EXIT_SUCCESS(0) and EXIT_FAILURE(1) */ -#define EXIT_FAIL_MEM 5 - -static void usage(char *argv[]) -{ - int i; - printf("\nDOCUMENTATION:\n%s\n", __doc__); - printf("\n"); - printf(" Usage: %s (options-see-below)\n", - argv[0]); - printf(" Listing options:\n"); - for (i = 0; long_options[i].name != 0; i++) { - printf(" --%-15s", long_options[i].name); - if (long_options[i].flag != NULL) - printf(" flag (internal value:%d)", - *long_options[i].flag); - else - printf("short-option: -%c", - long_options[i].val); - printf("\n"); - } - printf("\n"); -} - -#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_FAILURE); - } - return (__u64) t.tv_sec * NANOSEC_PER_SEC + t.tv_nsec; -} - -enum { - REDIR_SUCCESS = 0, - REDIR_ERROR = 1, -}; -#define REDIR_RES_MAX 2 -static const char *redir_names[REDIR_RES_MAX] = { - [REDIR_SUCCESS] = "Success", - [REDIR_ERROR] = "Error", -}; -static const char *err2str(int err) -{ - if (err < REDIR_RES_MAX) - return redir_names[err]; - return NULL; -} -/* enum xdp_action */ -#define XDP_UNKNOWN XDP_REDIRECT + 1 -#define XDP_ACTION_MAX (XDP_UNKNOWN + 1) -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", -}; -static const char *action2str(int action) -{ - if (action < XDP_ACTION_MAX) - return xdp_action_names[action]; - return NULL; -} - -/* Common stats data record shared with _kern.c */ -struct datarec { - __u64 processed; - __u64 dropped; - __u64 info; - __u64 err; -}; -#define MAX_CPUS 64 - -/* Userspace structs for collection of stats from maps */ -struct record { - __u64 timestamp; - struct datarec total; - struct datarec *cpu; + { "help", no_argument, NULL, 'h' }, + { "stats", no_argument, NULL, 's' }, + { "interval", required_argument, NULL, 'i' }, + { "verbose", no_argument, NULL, 'v' }, + {} }; -struct u64rec { - __u64 processed; -}; -struct record_u64 { - /* record for _kern side __u64 values */ - __u64 timestamp; - struct u64rec total; - struct u64rec *cpu; -}; - -struct stats_record { - struct record_u64 xdp_redirect[REDIR_RES_MAX]; - struct record_u64 xdp_exception[XDP_ACTION_MAX]; - struct record xdp_cpumap_kthread; - struct record xdp_cpumap_enqueue[MAX_CPUS]; - struct record xdp_devmap_xmit; -}; - -static bool map_collect_record(int fd, __u32 key, struct record *rec) -{ - /* 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_processed = 0; - __u64 sum_dropped = 0; - __u64 sum_info = 0; - __u64 sum_err = 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 false; - } - /* Get time as close as possible to reading map contents */ - rec->timestamp = gettime(); - - /* Record and sum values from each CPU */ - for (i = 0; i < nr_cpus; i++) { - rec->cpu[i].processed = values[i].processed; - sum_processed += values[i].processed; - rec->cpu[i].dropped = values[i].dropped; - sum_dropped += values[i].dropped; - rec->cpu[i].info = values[i].info; - sum_info += values[i].info; - rec->cpu[i].err = values[i].err; - sum_err += values[i].err; - } - rec->total.processed = sum_processed; - rec->total.dropped = sum_dropped; - rec->total.info = sum_info; - rec->total.err = sum_err; - return true; -} - -static bool map_collect_record_u64(int fd, __u32 key, struct record_u64 *rec) -{ - /* For percpu maps, userspace gets a value per possible CPU */ - unsigned int nr_cpus = bpf_num_possible_cpus(); - struct u64rec values[nr_cpus]; - __u64 sum_total = 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 false; - } - /* Get time as close as possible to reading map contents */ - rec->timestamp = gettime(); - - /* Record and sum values from each CPU */ - for (i = 0; i < nr_cpus; i++) { - rec->cpu[i].processed = values[i].processed; - sum_total += values[i].processed; - } - rec->total.processed = sum_total; - return true; -} - -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 double calc_period_u64(struct record_u64 *r, struct record_u64 *p) -{ - double period_ = 0; - __u64 period = 0; - - period = r->timestamp - p->timestamp; - if (period > 0) - period_ = ((double) period / NANOSEC_PER_SEC); - - return period_; -} - -static double calc_pps(struct datarec *r, struct datarec *p, double period) -{ - __u64 packets = 0; - double pps = 0; - - if (period > 0) { - packets = r->processed - p->processed; - pps = packets / period; - } - return pps; -} - -static double calc_pps_u64(struct u64rec *r, struct u64rec *p, double period) -{ - __u64 packets = 0; - double pps = 0; - - if (period > 0) { - packets = r->processed - p->processed; - pps = packets / period; - } - return pps; -} - -static double calc_drop(struct datarec *r, struct datarec *p, double period) -{ - __u64 packets = 0; - double pps = 0; - - if (period > 0) { - packets = r->dropped - p->dropped; - pps = packets / period; - } - return pps; -} - -static double calc_info(struct datarec *r, struct datarec *p, double period) -{ - __u64 packets = 0; - double pps = 0; - - if (period > 0) { - packets = r->info - p->info; - pps = packets / period; - } - return pps; -} - -static double calc_err(struct datarec *r, struct datarec *p, double period) -{ - __u64 packets = 0; - double pps = 0; - - if (period > 0) { - packets = r->err - p->err; - pps = packets / period; - } - return pps; -} - -static void stats_print(struct stats_record *stats_rec, - struct stats_record *stats_prev, - bool err_only) -{ - unsigned int nr_cpus = bpf_num_possible_cpus(); - int rec_i = 0, i, to_cpu; - double t = 0, pps = 0; - - /* Header */ - printf("%-15s %-7s %-12s %-12s %-9s\n", - "XDP-event", "CPU:to", "pps", "drop-pps", "extra-info"); - - /* tracepoint: xdp:xdp_redirect_* */ - if (err_only) - rec_i = REDIR_ERROR; - - for (; rec_i < REDIR_RES_MAX; rec_i++) { - struct record_u64 *rec, *prev; - char *fmt1 = "%-15s %-7d %'-12.0f %'-12.0f %s\n"; - char *fmt2 = "%-15s %-7s %'-12.0f %'-12.0f %s\n"; - - rec = &stats_rec->xdp_redirect[rec_i]; - prev = &stats_prev->xdp_redirect[rec_i]; - t = calc_period_u64(rec, prev); - - for (i = 0; i < nr_cpus; i++) { - struct u64rec *r = &rec->cpu[i]; - struct u64rec *p = &prev->cpu[i]; - - pps = calc_pps_u64(r, p, t); - if (pps > 0) - printf(fmt1, "XDP_REDIRECT", i, - rec_i ? 0.0: pps, rec_i ? pps : 0.0, - err2str(rec_i)); - } - pps = calc_pps_u64(&rec->total, &prev->total, t); - printf(fmt2, "XDP_REDIRECT", "total", - rec_i ? 0.0: pps, rec_i ? pps : 0.0, err2str(rec_i)); - } - - /* tracepoint: xdp:xdp_exception */ - for (rec_i = 0; rec_i < XDP_ACTION_MAX; rec_i++) { - struct record_u64 *rec, *prev; - char *fmt1 = "%-15s %-7d %'-12.0f %'-12.0f %s\n"; - char *fmt2 = "%-15s %-7s %'-12.0f %'-12.0f %s\n"; - - rec = &stats_rec->xdp_exception[rec_i]; - prev = &stats_prev->xdp_exception[rec_i]; - t = calc_period_u64(rec, prev); - - for (i = 0; i < nr_cpus; i++) { - struct u64rec *r = &rec->cpu[i]; - struct u64rec *p = &prev->cpu[i]; - - pps = calc_pps_u64(r, p, t); - if (pps > 0) - printf(fmt1, "Exception", i, - 0.0, pps, action2str(rec_i)); - } - pps = calc_pps_u64(&rec->total, &prev->total, t); - if (pps > 0) - printf(fmt2, "Exception", "total", - 0.0, pps, action2str(rec_i)); - } - - /* cpumap enqueue stats */ - for (to_cpu = 0; to_cpu < MAX_CPUS; to_cpu++) { - char *fmt1 = "%-15s %3d:%-3d %'-12.0f %'-12.0f %'-10.2f %s\n"; - char *fmt2 = "%-15s %3s:%-3d %'-12.0f %'-12.0f %'-10.2f %s\n"; - struct record *rec, *prev; - char *info_str = ""; - double drop, info; - - rec = &stats_rec->xdp_cpumap_enqueue[to_cpu]; - prev = &stats_prev->xdp_cpumap_enqueue[to_cpu]; - t = calc_period(rec, prev); - for (i = 0; i < nr_cpus; i++) { - struct datarec *r = &rec->cpu[i]; - struct datarec *p = &prev->cpu[i]; - - pps = calc_pps(r, p, t); - drop = calc_drop(r, p, t); - info = calc_info(r, p, t); - if (info > 0) { - info_str = "bulk-average"; - info = pps / info; /* calc average bulk size */ - } - if (pps > 0) - printf(fmt1, "cpumap-enqueue", - i, to_cpu, pps, drop, info, info_str); - } - pps = calc_pps(&rec->total, &prev->total, t); - if (pps > 0) { - drop = calc_drop(&rec->total, &prev->total, t); - info = calc_info(&rec->total, &prev->total, t); - if (info > 0) { - info_str = "bulk-average"; - info = pps / info; /* calc average bulk size */ - } - printf(fmt2, "cpumap-enqueue", - "sum", to_cpu, pps, drop, info, info_str); - } - } - - /* cpumap kthread stats */ - { - char *fmt1 = "%-15s %-7d %'-12.0f %'-12.0f %'-10.0f %s\n"; - char *fmt2 = "%-15s %-7s %'-12.0f %'-12.0f %'-10.0f %s\n"; - struct record *rec, *prev; - double drop, info; - char *i_str = ""; - - rec = &stats_rec->xdp_cpumap_kthread; - prev = &stats_prev->xdp_cpumap_kthread; - t = calc_period(rec, prev); - for (i = 0; i < nr_cpus; i++) { - struct datarec *r = &rec->cpu[i]; - struct datarec *p = &prev->cpu[i]; - - pps = calc_pps(r, p, t); - drop = calc_drop(r, p, t); - info = calc_info(r, p, t); - if (info > 0) - i_str = "sched"; - if (pps > 0 || drop > 0) - printf(fmt1, "cpumap-kthread", - i, pps, drop, info, i_str); - } - pps = calc_pps(&rec->total, &prev->total, t); - drop = calc_drop(&rec->total, &prev->total, t); - info = calc_info(&rec->total, &prev->total, t); - if (info > 0) - i_str = "sched-sum"; - printf(fmt2, "cpumap-kthread", "total", pps, drop, info, i_str); - } - - /* devmap ndo_xdp_xmit stats */ - { - char *fmt1 = "%-15s %-7d %'-12.0f %'-12.0f %'-10.2f %s %s\n"; - char *fmt2 = "%-15s %-7s %'-12.0f %'-12.0f %'-10.2f %s %s\n"; - struct record *rec, *prev; - double drop, info, err; - char *i_str = ""; - char *err_str = ""; - - rec = &stats_rec->xdp_devmap_xmit; - prev = &stats_prev->xdp_devmap_xmit; - t = calc_period(rec, prev); - for (i = 0; i < nr_cpus; i++) { - struct datarec *r = &rec->cpu[i]; - struct datarec *p = &prev->cpu[i]; - - pps = calc_pps(r, p, t); - drop = calc_drop(r, p, t); - info = calc_info(r, p, t); - err = calc_err(r, p, t); - if (info > 0) { - i_str = "bulk-average"; - info = (pps+drop) / info; /* calc avg bulk */ - } - if (err > 0) - err_str = "drv-err"; - if (pps > 0 || drop > 0) - printf(fmt1, "devmap-xmit", - i, pps, drop, info, i_str, err_str); - } - pps = calc_pps(&rec->total, &prev->total, t); - drop = calc_drop(&rec->total, &prev->total, t); - info = calc_info(&rec->total, &prev->total, t); - err = calc_err(&rec->total, &prev->total, t); - if (info > 0) { - i_str = "bulk-average"; - info = (pps+drop) / info; /* calc avg bulk */ - } - if (err > 0) - err_str = "drv-err"; - printf(fmt2, "devmap-xmit", "total", pps, drop, - info, i_str, err_str); - } - - printf("\n"); -} - -static bool stats_collect(struct stats_record *rec) -{ - int fd; - int i; - - /* TODO: Detect if someone unloaded the perf event_fd's, as - * this can happen by someone running perf-record -e - */ - - fd = bpf_map__fd(map_data[REDIRECT_ERR_CNT]); - for (i = 0; i < REDIR_RES_MAX; i++) - map_collect_record_u64(fd, i, &rec->xdp_redirect[i]); - - fd = bpf_map__fd(map_data[EXCEPTION_CNT]); - for (i = 0; i < XDP_ACTION_MAX; i++) { - map_collect_record_u64(fd, i, &rec->xdp_exception[i]); - } - - fd = bpf_map__fd(map_data[CPUMAP_ENQUEUE_CNT]); - for (i = 0; i < MAX_CPUS; i++) - map_collect_record(fd, i, &rec->xdp_cpumap_enqueue[i]); - - fd = bpf_map__fd(map_data[CPUMAP_KTHREAD_CNT]); - map_collect_record(fd, 0, &rec->xdp_cpumap_kthread); - - fd = bpf_map__fd(map_data[DEVMAP_XMIT_CNT]); - map_collect_record(fd, 0, &rec->xdp_devmap_xmit); - - return true; -} - -static void *alloc_rec_per_cpu(int record_size) -{ - unsigned int nr_cpus = bpf_num_possible_cpus(); - void *array; - - array = calloc(nr_cpus, record_size); - if (!array) { - fprintf(stderr, "Mem alloc error (nr_cpus:%u)\n", nr_cpus); - exit(EXIT_FAIL_MEM); - } - return array; -} - -static struct stats_record *alloc_stats_record(void) -{ - struct stats_record *rec; - int rec_sz; - int i; - - /* Alloc main stats_record structure */ - rec = calloc(1, sizeof(*rec)); - if (!rec) { - fprintf(stderr, "Mem alloc error\n"); - exit(EXIT_FAIL_MEM); - } - - /* Alloc stats stored per CPU for each record */ - rec_sz = sizeof(struct u64rec); - for (i = 0; i < REDIR_RES_MAX; i++) - rec->xdp_redirect[i].cpu = alloc_rec_per_cpu(rec_sz); - - for (i = 0; i < XDP_ACTION_MAX; i++) - rec->xdp_exception[i].cpu = alloc_rec_per_cpu(rec_sz); - - rec_sz = sizeof(struct datarec); - rec->xdp_cpumap_kthread.cpu = alloc_rec_per_cpu(rec_sz); - rec->xdp_devmap_xmit.cpu = alloc_rec_per_cpu(rec_sz); - - for (i = 0; i < MAX_CPUS; i++) - rec->xdp_cpumap_enqueue[i].cpu = alloc_rec_per_cpu(rec_sz); - - return rec; -} - -static void free_stats_record(struct stats_record *r) -{ - int i; - - for (i = 0; i < REDIR_RES_MAX; i++) - free(r->xdp_redirect[i].cpu); - - for (i = 0; i < XDP_ACTION_MAX; i++) - free(r->xdp_exception[i].cpu); - - free(r->xdp_cpumap_kthread.cpu); - free(r->xdp_devmap_xmit.cpu); - - for (i = 0; i < MAX_CPUS; i++) - free(r->xdp_cpumap_enqueue[i].cpu); - - free(r); -} - -/* Pointer swap trick */ -static inline void swap(struct stats_record **a, struct stats_record **b) -{ - struct stats_record *tmp; - - tmp = *a; - *a = *b; - *b = tmp; -} - -static void stats_poll(int interval, bool err_only) -{ - struct stats_record *rec, *prev; - - rec = alloc_stats_record(); - prev = alloc_stats_record(); - stats_collect(rec); - - if (err_only) - printf("\n%s\n", __doc_err_only__); - - /* Trick to pretty printf with thousands separators use %' */ - setlocale(LC_NUMERIC, "en_US"); - - /* Header */ - if (verbose) - printf("\n%s", __doc__); - - /* TODO Need more advanced stats on error types */ - if (verbose) { - printf(" - Stats map0: %s\n", bpf_map__name(map_data[0])); - printf(" - Stats map1: %s\n", bpf_map__name(map_data[1])); - printf("\n"); - } - fflush(stdout); - - while (1) { - swap(&prev, &rec); - stats_collect(rec); - stats_print(rec, prev, err_only); - fflush(stdout); - sleep(interval); - } - - free_stats_record(rec); - free_stats_record(prev); -} - -static void print_bpf_prog_info(void) -{ - struct bpf_program *prog; - struct bpf_map *map; - int i = 0; - - /* Prog info */ - printf("Loaded BPF prog have %d bpf program(s)\n", tp_cnt); - bpf_object__for_each_program(prog, obj) { - printf(" - prog_fd[%d] = fd(%d)\n", i, bpf_program__fd(prog)); - i++; - } - - i = 0; - /* Maps info */ - printf("Loaded BPF prog have %d map(s)\n", map_cnt); - bpf_object__for_each_map(map, obj) { - const char *name = bpf_map__name(map); - int fd = bpf_map__fd(map); - - printf(" - map_data[%d] = fd(%d) name:%s\n", i, fd, name); - i++; - } - - /* Event info */ - printf("Searching for (max:%d) event file descriptor(s)\n", tp_cnt); - for (i = 0; i < tp_cnt; i++) { - int fd = bpf_link__fd(tp_links[i]); - - if (fd != -1) - printf(" - event_fd[%d] = fd(%d)\n", i, fd); - } -} int main(int argc, char **argv) { - struct bpf_program *prog; - int longindex = 0, opt; - int ret = EXIT_FAILURE; - enum map_type type; - char filename[256]; - - /* Default settings: */ + unsigned long interval = 2; + int ret = EXIT_FAIL_OPTION; + struct xdp_monitor *skel; bool errors_only = true; - int interval = 2; + int longindex = 0, opt; + bool error = true; /* Parse commands line args */ - while ((opt = getopt_long(argc, argv, "hDSs:", + while ((opt = getopt_long(argc, argv, "si:vh", long_options, &longindex)) != -1) { switch (opt) { - case 'D': - debug = true; - break; - case 'S': + case 's': errors_only = false; + mask |= SAMPLE_REDIRECT_CNT; break; - case 's': - interval = atoi(optarg); + case 'i': + interval = strtoul(optarg, NULL, 0); + break; + case 'v': + sample_switch_mode(); break; case 'h': + error = false; default: - usage(argv); + sample_usage(argv, long_options, __doc__, mask, error); return ret; } } - snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); - - /* Remove tracepoint program when program is interrupted or killed */ - signal(SIGINT, int_exit); - signal(SIGTERM, int_exit); - - obj = bpf_object__open_file(filename, NULL); - if (libbpf_get_error(obj)) { - printf("ERROR: opening BPF object file failed\n"); - obj = NULL; - goto cleanup; - } - - /* load BPF program */ - if (bpf_object__load(obj)) { - printf("ERROR: loading BPF object file failed\n"); - goto cleanup; + skel = xdp_monitor__open(); + if (!skel) { + fprintf(stderr, "Failed to xdp_monitor__open: %s\n", + strerror(errno)); + ret = EXIT_FAIL_BPF; + goto end; } - for (type = 0; type < NUM_MAP; type++) { - map_data[type] = - bpf_object__find_map_by_name(obj, map_type_strings[type]); - - if (libbpf_get_error(map_data[type])) { - printf("ERROR: finding a map in obj file failed\n"); - goto cleanup; - } - map_cnt++; + ret = sample_init_pre_load(skel); + if (ret < 0) { + fprintf(stderr, "Failed to sample_init_pre_load: %s\n", strerror(-ret)); + ret = EXIT_FAIL_BPF; + goto end_destroy; } - bpf_object__for_each_program(prog, obj) { - tp_links[tp_cnt] = bpf_program__attach(prog); - if (libbpf_get_error(tp_links[tp_cnt])) { - printf("ERROR: bpf_program__attach failed\n"); - tp_links[tp_cnt] = NULL; - goto cleanup; - } - tp_cnt++; + ret = xdp_monitor__load(skel); + if (ret < 0) { + fprintf(stderr, "Failed to xdp_monitor__load: %s\n", strerror(errno)); + ret = EXIT_FAIL_BPF; + goto end_destroy; } - if (debug) { - print_bpf_prog_info(); + ret = sample_init(skel, mask); + if (ret < 0) { + fprintf(stderr, "Failed to initialize sample: %s\n", strerror(-ret)); + ret = EXIT_FAIL_BPF; + goto end_destroy; } - /* Unload/stop tracepoint event by closing bpf_link's */ - if (errors_only) { - /* The bpf_link[i] depend on the order of - * the functions was defined in _kern.c - */ - bpf_link__destroy(tp_links[2]); /* tracepoint/xdp/xdp_redirect */ - tp_links[2] = NULL; + if (errors_only) + printf("%s", __doc_err_only__); - bpf_link__destroy(tp_links[3]); /* tracepoint/xdp/xdp_redirect_map */ - tp_links[3] = NULL; + ret = sample_run(interval, NULL, NULL); + if (ret < 0) { + fprintf(stderr, "Failed during sample run: %s\n", strerror(-ret)); + ret = EXIT_FAIL; + goto end_destroy; } - - stats_poll(interval, errors_only); - - ret = EXIT_SUCCESS; - -cleanup: - /* Detach tracepoints */ - while (tp_cnt) - bpf_link__destroy(tp_links[--tp_cnt]); - - bpf_object__close(obj); - return ret; + ret = EXIT_OK; +end_destroy: + xdp_monitor__destroy(skel); +end: + sample_exit(ret); } diff --git a/samples/bpf/xdp_redirect.bpf.c b/samples/bpf/xdp_redirect.bpf.c new file mode 100644 index 000000000000..7c02bacfe96b --- /dev/null +++ b/samples/bpf/xdp_redirect.bpf.c @@ -0,0 +1,49 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2016 John Fastabend <john.r.fastabend@intel.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. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ +#include "vmlinux.h" +#include "xdp_sample.bpf.h" +#include "xdp_sample_shared.h" + +const volatile int ifindex_out; + +SEC("xdp") +int xdp_redirect_prog(struct xdp_md *ctx) +{ + void *data_end = (void *)(long)ctx->data_end; + void *data = (void *)(long)ctx->data; + u32 key = bpf_get_smp_processor_id(); + struct ethhdr *eth = data; + struct datarec *rec; + u64 nh_off; + + nh_off = sizeof(*eth); + if (data + nh_off > data_end) + return XDP_DROP; + + rec = bpf_map_lookup_elem(&rx_cnt, &key); + if (!rec) + return XDP_PASS; + NO_TEAR_INC(rec->processed); + + swap_src_dst_mac(data); + return bpf_redirect(ifindex_out, 0); +} + +/* Redirect require an XDP bpf_prog loaded on the TX device */ +SEC("xdp") +int xdp_redirect_dummy_prog(struct xdp_md *ctx) +{ + return XDP_PASS; +} + +char _license[] SEC("license") = "GPL"; diff --git a/samples/bpf/xdp_redirect_cpu_kern.c b/samples/bpf/xdp_redirect_cpu.bpf.c index 8255025dea97..f10fe3cf25f6 100644 --- a/samples/bpf/xdp_redirect_cpu_kern.c +++ b/samples/bpf/xdp_redirect_cpu.bpf.c @@ -2,74 +2,18 @@ * * GPLv2, Copyright(c) 2017 Jesper Dangaard Brouer, Red Hat, Inc. */ -#include <uapi/linux/if_ether.h> -#include <uapi/linux/if_packet.h> -#include <uapi/linux/if_vlan.h> -#include <uapi/linux/ip.h> -#include <uapi/linux/ipv6.h> -#include <uapi/linux/in.h> -#include <uapi/linux/tcp.h> -#include <uapi/linux/udp.h> - -#include <uapi/linux/bpf.h> -#include <bpf/bpf_helpers.h> +#include "vmlinux.h" +#include "xdp_sample.bpf.h" +#include "xdp_sample_shared.h" #include "hash_func01.h" -#define MAX_CPUS NR_CPUS - /* Special map type that can XDP_REDIRECT frames to another CPU */ struct { __uint(type, BPF_MAP_TYPE_CPUMAP); __uint(key_size, sizeof(u32)); __uint(value_size, sizeof(struct bpf_cpumap_val)); - __uint(max_entries, MAX_CPUS); } cpu_map SEC(".maps"); -/* Common stats data record to keep userspace more simple */ -struct datarec { - __u64 processed; - __u64 dropped; - __u64 issue; - __u64 xdp_pass; - __u64 xdp_drop; - __u64 xdp_redirect; -}; - -/* Count RX packets, as XDP bpf_prog doesn't get direct TX-success - * feedback. Redirect TX errors can be caught via a tracepoint. - */ -struct { - __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY); - __type(key, u32); - __type(value, struct datarec); - __uint(max_entries, 1); -} rx_cnt SEC(".maps"); - -/* Used by trace point */ -struct { - __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY); - __type(key, u32); - __type(value, struct datarec); - __uint(max_entries, 2); - /* TODO: have entries for all possible errno's */ -} redirect_err_cnt SEC(".maps"); - -/* Used by trace point */ -struct { - __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY); - __type(key, u32); - __type(value, struct datarec); - __uint(max_entries, MAX_CPUS); -} cpumap_enqueue_cnt SEC(".maps"); - -/* Used by trace point */ -struct { - __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY); - __type(key, u32); - __type(value, struct datarec); - __uint(max_entries, 1); -} cpumap_kthread_cnt SEC(".maps"); - /* Set of maps controlling available CPU, and for iterating through * selectable redirect CPUs. */ @@ -77,14 +21,15 @@ struct { __uint(type, BPF_MAP_TYPE_ARRAY); __type(key, u32); __type(value, u32); - __uint(max_entries, MAX_CPUS); } cpus_available SEC(".maps"); + struct { __uint(type, BPF_MAP_TYPE_ARRAY); __type(key, u32); __type(value, u32); __uint(max_entries, 1); } cpus_count SEC(".maps"); + struct { __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY); __type(key, u32); @@ -92,24 +37,16 @@ struct { __uint(max_entries, 1); } cpus_iterator SEC(".maps"); -/* Used by trace point */ struct { - __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY); - __type(key, u32); - __type(value, struct datarec); + __uint(type, BPF_MAP_TYPE_DEVMAP); + __uint(key_size, sizeof(int)); + __uint(value_size, sizeof(struct bpf_devmap_val)); __uint(max_entries, 1); -} exception_cnt SEC(".maps"); +} tx_port SEC(".maps"); -/* Helper parse functions */ +char tx_mac_addr[ETH_ALEN]; -/* Parse Ethernet layer 2, extract network layer 3 offset and protocol - * - * Returns false on error and non-supported ether-type - */ -struct vlan_hdr { - __be16 h_vlan_TCI; - __be16 h_vlan_encapsulated_proto; -}; +/* Helper parse functions */ static __always_inline bool parse_eth(struct ethhdr *eth, void *data_end, @@ -125,11 +62,12 @@ bool parse_eth(struct ethhdr *eth, void *data_end, eth_type = eth->h_proto; /* Skip non 802.3 Ethertypes */ - if (unlikely(ntohs(eth_type) < ETH_P_802_3_MIN)) + if (__builtin_expect(bpf_ntohs(eth_type) < ETH_P_802_3_MIN, 0)) return false; /* Handle VLAN tagged packet */ - if (eth_type == htons(ETH_P_8021Q) || eth_type == htons(ETH_P_8021AD)) { + if (eth_type == bpf_htons(ETH_P_8021Q) || + eth_type == bpf_htons(ETH_P_8021AD)) { struct vlan_hdr *vlan_hdr; vlan_hdr = (void *)eth + offset; @@ -139,7 +77,8 @@ bool parse_eth(struct ethhdr *eth, void *data_end, eth_type = vlan_hdr->h_vlan_encapsulated_proto; } /* Handle double VLAN tagged packet */ - if (eth_type == htons(ETH_P_8021Q) || eth_type == htons(ETH_P_8021AD)) { + if (eth_type == bpf_htons(ETH_P_8021Q) || + eth_type == bpf_htons(ETH_P_8021AD)) { struct vlan_hdr *vlan_hdr; vlan_hdr = (void *)eth + offset; @@ -149,7 +88,7 @@ bool parse_eth(struct ethhdr *eth, void *data_end, eth_type = vlan_hdr->h_vlan_encapsulated_proto; } - *eth_proto = ntohs(eth_type); + *eth_proto = bpf_ntohs(eth_type); *l3_offset = offset; return true; } @@ -172,7 +111,7 @@ u16 get_dest_port_ipv4_udp(struct xdp_md *ctx, u64 nh_off) if (udph + 1 > data_end) return 0; - dport = ntohs(udph->dest); + dport = bpf_ntohs(udph->dest); return dport; } @@ -200,50 +139,48 @@ int get_proto_ipv6(struct xdp_md *ctx, u64 nh_off) return ip6h->nexthdr; } -SEC("xdp_cpu_map0") +SEC("xdp") int xdp_prognum0_no_touch(struct xdp_md *ctx) { - void *data_end = (void *)(long)ctx->data_end; - void *data = (void *)(long)ctx->data; + u32 key = bpf_get_smp_processor_id(); struct datarec *rec; u32 *cpu_selected; - u32 cpu_dest; - u32 key = 0; + u32 cpu_dest = 0; + u32 key0 = 0; /* Only use first entry in cpus_available */ - cpu_selected = bpf_map_lookup_elem(&cpus_available, &key); + cpu_selected = bpf_map_lookup_elem(&cpus_available, &key0); if (!cpu_selected) return XDP_ABORTED; cpu_dest = *cpu_selected; - /* Count RX packet in map */ rec = bpf_map_lookup_elem(&rx_cnt, &key); if (!rec) - return XDP_ABORTED; - rec->processed++; + return XDP_PASS; + NO_TEAR_INC(rec->processed); - if (cpu_dest >= MAX_CPUS) { - rec->issue++; + if (cpu_dest >= nr_cpus) { + NO_TEAR_INC(rec->issue); return XDP_ABORTED; } - return bpf_redirect_map(&cpu_map, cpu_dest, 0); } -SEC("xdp_cpu_map1_touch_data") +SEC("xdp") int xdp_prognum1_touch_data(struct xdp_md *ctx) { void *data_end = (void *)(long)ctx->data_end; void *data = (void *)(long)ctx->data; + u32 key = bpf_get_smp_processor_id(); struct ethhdr *eth = data; struct datarec *rec; u32 *cpu_selected; - u32 cpu_dest; + u32 cpu_dest = 0; + u32 key0 = 0; u16 eth_type; - u32 key = 0; /* Only use first entry in cpus_available */ - cpu_selected = bpf_map_lookup_elem(&cpus_available, &key); + cpu_selected = bpf_map_lookup_elem(&cpus_available, &key0); if (!cpu_selected) return XDP_ABORTED; cpu_dest = *cpu_selected; @@ -252,36 +189,33 @@ int xdp_prognum1_touch_data(struct xdp_md *ctx) if (eth + 1 > data_end) return XDP_ABORTED; - /* Count RX packet in map */ rec = bpf_map_lookup_elem(&rx_cnt, &key); if (!rec) - return XDP_ABORTED; - rec->processed++; + return XDP_PASS; + NO_TEAR_INC(rec->processed); /* Read packet data, and use it (drop non 802.3 Ethertypes) */ eth_type = eth->h_proto; - if (ntohs(eth_type) < ETH_P_802_3_MIN) { - rec->dropped++; + if (bpf_ntohs(eth_type) < ETH_P_802_3_MIN) { + NO_TEAR_INC(rec->dropped); return XDP_DROP; } - if (cpu_dest >= MAX_CPUS) { - rec->issue++; + if (cpu_dest >= nr_cpus) { + NO_TEAR_INC(rec->issue); return XDP_ABORTED; } - return bpf_redirect_map(&cpu_map, cpu_dest, 0); } -SEC("xdp_cpu_map2_round_robin") +SEC("xdp") int xdp_prognum2_round_robin(struct xdp_md *ctx) { void *data_end = (void *)(long)ctx->data_end; void *data = (void *)(long)ctx->data; - struct ethhdr *eth = data; + u32 key = bpf_get_smp_processor_id(); struct datarec *rec; - u32 cpu_dest; - u32 *cpu_lookup; + u32 cpu_dest = 0; u32 key0 = 0; u32 *cpu_selected; @@ -307,40 +241,37 @@ int xdp_prognum2_round_robin(struct xdp_md *ctx) return XDP_ABORTED; cpu_dest = *cpu_selected; - /* Count RX packet in map */ - rec = bpf_map_lookup_elem(&rx_cnt, &key0); + rec = bpf_map_lookup_elem(&rx_cnt, &key); if (!rec) - return XDP_ABORTED; - rec->processed++; + return XDP_PASS; + NO_TEAR_INC(rec->processed); - if (cpu_dest >= MAX_CPUS) { - rec->issue++; + if (cpu_dest >= nr_cpus) { + NO_TEAR_INC(rec->issue); return XDP_ABORTED; } - return bpf_redirect_map(&cpu_map, cpu_dest, 0); } -SEC("xdp_cpu_map3_proto_separate") +SEC("xdp") int xdp_prognum3_proto_separate(struct xdp_md *ctx) { void *data_end = (void *)(long)ctx->data_end; void *data = (void *)(long)ctx->data; + u32 key = bpf_get_smp_processor_id(); struct ethhdr *eth = data; u8 ip_proto = IPPROTO_UDP; struct datarec *rec; u16 eth_proto = 0; u64 l3_offset = 0; u32 cpu_dest = 0; - u32 cpu_idx = 0; u32 *cpu_lookup; - u32 key = 0; + u32 cpu_idx = 0; - /* Count RX packet in map */ rec = bpf_map_lookup_elem(&rx_cnt, &key); if (!rec) - return XDP_ABORTED; - rec->processed++; + return XDP_PASS; + NO_TEAR_INC(rec->processed); if (!(parse_eth(eth, data_end, ð_proto, &l3_offset))) return XDP_PASS; /* Just skip */ @@ -381,35 +312,33 @@ int xdp_prognum3_proto_separate(struct xdp_md *ctx) return XDP_ABORTED; cpu_dest = *cpu_lookup; - if (cpu_dest >= MAX_CPUS) { - rec->issue++; + if (cpu_dest >= nr_cpus) { + NO_TEAR_INC(rec->issue); return XDP_ABORTED; } - return bpf_redirect_map(&cpu_map, cpu_dest, 0); } -SEC("xdp_cpu_map4_ddos_filter_pktgen") +SEC("xdp") int xdp_prognum4_ddos_filter_pktgen(struct xdp_md *ctx) { void *data_end = (void *)(long)ctx->data_end; void *data = (void *)(long)ctx->data; + u32 key = bpf_get_smp_processor_id(); struct ethhdr *eth = data; u8 ip_proto = IPPROTO_UDP; struct datarec *rec; u16 eth_proto = 0; u64 l3_offset = 0; u32 cpu_dest = 0; + u32 *cpu_lookup; u32 cpu_idx = 0; u16 dest_port; - u32 *cpu_lookup; - u32 key = 0; - /* Count RX packet in map */ rec = bpf_map_lookup_elem(&rx_cnt, &key); if (!rec) - return XDP_ABORTED; - rec->processed++; + return XDP_PASS; + NO_TEAR_INC(rec->processed); if (!(parse_eth(eth, data_end, ð_proto, &l3_offset))) return XDP_PASS; /* Just skip */ @@ -443,8 +372,7 @@ int xdp_prognum4_ddos_filter_pktgen(struct xdp_md *ctx) /* DDoS filter UDP port 9 (pktgen) */ dest_port = get_dest_port_ipv4_udp(ctx, l3_offset); if (dest_port == 9) { - if (rec) - rec->dropped++; + NO_TEAR_INC(rec->dropped); return XDP_DROP; } break; @@ -457,11 +385,10 @@ int xdp_prognum4_ddos_filter_pktgen(struct xdp_md *ctx) return XDP_ABORTED; cpu_dest = *cpu_lookup; - if (cpu_dest >= MAX_CPUS) { - rec->issue++; + if (cpu_dest >= nr_cpus) { + NO_TEAR_INC(rec->issue); return XDP_ABORTED; } - return bpf_redirect_map(&cpu_map, cpu_dest, 0); } @@ -496,10 +423,10 @@ u32 get_ipv6_hash_ip_pair(struct xdp_md *ctx, u64 nh_off) if (ip6h + 1 > data_end) return 0; - cpu_hash = ip6h->saddr.s6_addr32[0] + ip6h->daddr.s6_addr32[0]; - cpu_hash += ip6h->saddr.s6_addr32[1] + ip6h->daddr.s6_addr32[1]; - cpu_hash += ip6h->saddr.s6_addr32[2] + ip6h->daddr.s6_addr32[2]; - cpu_hash += ip6h->saddr.s6_addr32[3] + ip6h->daddr.s6_addr32[3]; + cpu_hash = ip6h->saddr.in6_u.u6_addr32[0] + ip6h->daddr.in6_u.u6_addr32[0]; + cpu_hash += ip6h->saddr.in6_u.u6_addr32[1] + ip6h->daddr.in6_u.u6_addr32[1]; + cpu_hash += ip6h->saddr.in6_u.u6_addr32[2] + ip6h->daddr.in6_u.u6_addr32[2]; + cpu_hash += ip6h->saddr.in6_u.u6_addr32[3] + ip6h->daddr.in6_u.u6_addr32[3]; cpu_hash = SuperFastHash((char *)&cpu_hash, 4, INITVAL + ip6h->nexthdr); return cpu_hash; @@ -509,30 +436,29 @@ u32 get_ipv6_hash_ip_pair(struct xdp_md *ctx, u64 nh_off) * hashing scheme is symmetric, meaning swapping IP src/dest still hit * same CPU. */ -SEC("xdp_cpu_map5_lb_hash_ip_pairs") +SEC("xdp") int xdp_prognum5_lb_hash_ip_pairs(struct xdp_md *ctx) { void *data_end = (void *)(long)ctx->data_end; void *data = (void *)(long)ctx->data; + u32 key = bpf_get_smp_processor_id(); struct ethhdr *eth = data; - u8 ip_proto = IPPROTO_UDP; struct datarec *rec; u16 eth_proto = 0; u64 l3_offset = 0; u32 cpu_dest = 0; u32 cpu_idx = 0; u32 *cpu_lookup; + u32 key0 = 0; u32 *cpu_max; u32 cpu_hash; - u32 key = 0; - /* Count RX packet in map */ rec = bpf_map_lookup_elem(&rx_cnt, &key); if (!rec) - return XDP_ABORTED; - rec->processed++; + return XDP_PASS; + NO_TEAR_INC(rec->processed); - cpu_max = bpf_map_lookup_elem(&cpus_count, &key); + cpu_max = bpf_map_lookup_elem(&cpus_count, &key0); if (!cpu_max) return XDP_ABORTED; @@ -560,171 +486,56 @@ int xdp_prognum5_lb_hash_ip_pairs(struct xdp_md *ctx) return XDP_ABORTED; cpu_dest = *cpu_lookup; - if (cpu_dest >= MAX_CPUS) { - rec->issue++; + if (cpu_dest >= nr_cpus) { + NO_TEAR_INC(rec->issue); return XDP_ABORTED; } - return bpf_redirect_map(&cpu_map, cpu_dest, 0); } -char _license[] SEC("license") = "GPL"; - -/*** Trace point code ***/ - -/* Tracepoint format: /sys/kernel/debug/tracing/events/xdp/xdp_redirect/format - * Code in: kernel/include/trace/events/xdp.h - */ -struct xdp_redirect_ctx { - u64 __pad; // First 8 bytes are not accessible by bpf code - int prog_id; // offset:8; size:4; signed:1; - u32 act; // offset:12 size:4; signed:0; - int ifindex; // offset:16 size:4; signed:1; - int err; // offset:20 size:4; signed:1; - int to_ifindex; // offset:24 size:4; signed:1; - u32 map_id; // offset:28 size:4; signed:0; - int map_index; // offset:32 size:4; signed:1; -}; // offset:36 - -enum { - XDP_REDIRECT_SUCCESS = 0, - XDP_REDIRECT_ERROR = 1 -}; - -static __always_inline -int xdp_redirect_collect_stat(struct xdp_redirect_ctx *ctx) +SEC("xdp_cpumap/redirect") +int xdp_redirect_cpu_devmap(struct xdp_md *ctx) { - u32 key = XDP_REDIRECT_ERROR; - struct datarec *rec; - int err = ctx->err; + void *data_end = (void *)(long)ctx->data_end; + void *data = (void *)(long)ctx->data; + struct ethhdr *eth = data; + u64 nh_off; - if (!err) - key = XDP_REDIRECT_SUCCESS; + nh_off = sizeof(*eth); + if (data + nh_off > data_end) + return XDP_DROP; - rec = bpf_map_lookup_elem(&redirect_err_cnt, &key); - if (!rec) - return 0; - rec->dropped += 1; - - return 0; /* Indicate event was filtered (no further processing)*/ - /* - * Returning 1 here would allow e.g. a perf-record tracepoint - * to see and record these events, but it doesn't work well - * in-practice as stopping perf-record also unload this - * bpf_prog. Plus, there is additional overhead of doing so. - */ + swap_src_dst_mac(data); + return bpf_redirect_map(&tx_port, 0, 0); } -SEC("tracepoint/xdp/xdp_redirect_err") -int trace_xdp_redirect_err(struct xdp_redirect_ctx *ctx) +SEC("xdp_cpumap/pass") +int xdp_redirect_cpu_pass(struct xdp_md *ctx) { - return xdp_redirect_collect_stat(ctx); + return XDP_PASS; } -SEC("tracepoint/xdp/xdp_redirect_map_err") -int trace_xdp_redirect_map_err(struct xdp_redirect_ctx *ctx) +SEC("xdp_cpumap/drop") +int xdp_redirect_cpu_drop(struct xdp_md *ctx) { - return xdp_redirect_collect_stat(ctx); + return XDP_DROP; } -/* Tracepoint format: /sys/kernel/debug/tracing/events/xdp/xdp_exception/format - * Code in: kernel/include/trace/events/xdp.h - */ -struct xdp_exception_ctx { - u64 __pad; // First 8 bytes are not accessible by bpf code - int prog_id; // offset:8; size:4; signed:1; - u32 act; // offset:12; size:4; signed:0; - int ifindex; // offset:16; size:4; signed:1; -}; - -SEC("tracepoint/xdp/xdp_exception") -int trace_xdp_exception(struct xdp_exception_ctx *ctx) +SEC("xdp_devmap/egress") +int xdp_redirect_egress_prog(struct xdp_md *ctx) { - struct datarec *rec; - u32 key = 0; - - rec = bpf_map_lookup_elem(&exception_cnt, &key); - if (!rec) - return 1; - rec->dropped += 1; - - return 0; -} + void *data_end = (void *)(long)ctx->data_end; + void *data = (void *)(long)ctx->data; + struct ethhdr *eth = data; + u64 nh_off; -/* Tracepoint: /sys/kernel/debug/tracing/events/xdp/xdp_cpumap_enqueue/format - * Code in: kernel/include/trace/events/xdp.h - */ -struct cpumap_enqueue_ctx { - u64 __pad; // First 8 bytes are not accessible by bpf code - int map_id; // offset:8; size:4; signed:1; - u32 act; // offset:12; size:4; signed:0; - int cpu; // offset:16; size:4; signed:1; - unsigned int drops; // offset:20; size:4; signed:0; - unsigned int processed; // offset:24; size:4; signed:0; - int to_cpu; // offset:28; size:4; signed:1; -}; - -SEC("tracepoint/xdp/xdp_cpumap_enqueue") -int trace_xdp_cpumap_enqueue(struct cpumap_enqueue_ctx *ctx) -{ - u32 to_cpu = ctx->to_cpu; - struct datarec *rec; + nh_off = sizeof(*eth); + if (data + nh_off > data_end) + return XDP_DROP; - if (to_cpu >= MAX_CPUS) - return 1; + __builtin_memcpy(eth->h_source, (const char *)tx_mac_addr, ETH_ALEN); - rec = bpf_map_lookup_elem(&cpumap_enqueue_cnt, &to_cpu); - if (!rec) - return 0; - rec->processed += ctx->processed; - rec->dropped += ctx->drops; - - /* Record bulk events, then userspace can calc average bulk size */ - if (ctx->processed > 0) - rec->issue += 1; - - /* Inception: It's possible to detect overload situations, via - * this tracepoint. This can be used for creating a feedback - * loop to XDP, which can take appropriate actions to mitigate - * this overload situation. - */ - return 0; + return XDP_PASS; } -/* Tracepoint: /sys/kernel/debug/tracing/events/xdp/xdp_cpumap_kthread/format - * Code in: kernel/include/trace/events/xdp.h - */ -struct cpumap_kthread_ctx { - u64 __pad; // First 8 bytes are not accessible - int map_id; // offset:8; size:4; signed:1; - u32 act; // offset:12; size:4; signed:0; - int cpu; // offset:16; size:4; signed:1; - unsigned int drops; // offset:20; size:4; signed:0; - unsigned int processed; // offset:24; size:4; signed:0; - int sched; // offset:28; size:4; signed:1; - unsigned int xdp_pass; // offset:32; size:4; signed:0; - unsigned int xdp_drop; // offset:36; size:4; signed:0; - unsigned int xdp_redirect; // offset:40; size:4; signed:0; -}; - -SEC("tracepoint/xdp/xdp_cpumap_kthread") -int trace_xdp_cpumap_kthread(struct cpumap_kthread_ctx *ctx) -{ - struct datarec *rec; - u32 key = 0; - - rec = bpf_map_lookup_elem(&cpumap_kthread_cnt, &key); - if (!rec) - return 0; - rec->processed += ctx->processed; - rec->dropped += ctx->drops; - rec->xdp_pass += ctx->xdp_pass; - rec->xdp_drop += ctx->xdp_drop; - rec->xdp_redirect += ctx->xdp_redirect; - - /* Count times kthread yielded CPU via schedule call */ - if (ctx->sched) - rec->issue++; - - return 0; -} +char _license[] SEC("license") = "GPL"; diff --git a/samples/bpf/xdp_redirect_cpu_user.c b/samples/bpf/xdp_redirect_cpu_user.c index 576411612523..6e25fba64c72 100644 --- a/samples/bpf/xdp_redirect_cpu_user.c +++ b/samples/bpf/xdp_redirect_cpu_user.c @@ -2,7 +2,16 @@ /* Copyright(c) 2017 Jesper Dangaard Brouer, Red Hat, Inc. */ static const char *__doc__ = - " XDP redirect with a CPU-map type \"BPF_MAP_TYPE_CPUMAP\""; +"XDP CPU redirect tool, using BPF_MAP_TYPE_CPUMAP\n" +"Usage: xdp_redirect_cpu -d <IFINDEX|IFNAME> -c 0 ... -c N\n" +"Valid specification for CPUMAP BPF program:\n" +" --mprog-name/-e pass (use built-in XDP_PASS program)\n" +" --mprog-name/-e drop (use built-in XDP_DROP program)\n" +" --redirect-device/-r <ifindex|ifname> (use built-in DEVMAP redirect program)\n" +" Custom CPUMAP BPF program:\n" +" --mprog-filename/-f <filename> --mprog-name/-e <program>\n" +" Optionally, also pass --redirect-map/-m and --redirect-device/-r together\n" +" to configure DEVMAP in BPF object <filename>\n"; #include <errno.h> #include <signal.h> @@ -18,558 +27,62 @@ static const char *__doc__ = #include <net/if.h> #include <time.h> #include <linux/limits.h> - #include <arpa/inet.h> #include <linux/if_link.h> - -/* How many xdp_progs are defined in _kern.c */ -#define MAX_PROG 6 - #include <bpf/bpf.h> #include <bpf/libbpf.h> - #include "bpf_util.h" +#include "xdp_sample_user.h" +#include "xdp_redirect_cpu.skel.h" -static int ifindex = -1; -static char ifname_buf[IF_NAMESIZE]; -static char *ifname; -static __u32 prog_id; - -static __u32 xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST; -static int n_cpus; - -enum map_type { - CPU_MAP, - RX_CNT, - REDIRECT_ERR_CNT, - CPUMAP_ENQUEUE_CNT, - CPUMAP_KTHREAD_CNT, - CPUS_AVAILABLE, - CPUS_COUNT, - CPUS_ITERATOR, - EXCEPTION_CNT, -}; - -static const char *const map_type_strings[] = { - [CPU_MAP] = "cpu_map", - [RX_CNT] = "rx_cnt", - [REDIRECT_ERR_CNT] = "redirect_err_cnt", - [CPUMAP_ENQUEUE_CNT] = "cpumap_enqueue_cnt", - [CPUMAP_KTHREAD_CNT] = "cpumap_kthread_cnt", - [CPUS_AVAILABLE] = "cpus_available", - [CPUS_COUNT] = "cpus_count", - [CPUS_ITERATOR] = "cpus_iterator", - [EXCEPTION_CNT] = "exception_cnt", -}; +static int map_fd; +static int avail_fd; +static int count_fd; -#define NUM_TP 5 -#define NUM_MAP 9 -struct bpf_link *tp_links[NUM_TP] = {}; -static int map_fds[NUM_MAP]; -static int tp_cnt = 0; +static int mask = SAMPLE_RX_CNT | SAMPLE_REDIRECT_ERR_MAP_CNT | + SAMPLE_CPUMAP_ENQUEUE_CNT | SAMPLE_CPUMAP_KTHREAD_CNT | + SAMPLE_EXCEPTION_CNT; -/* Exit return codes */ -#define EXIT_OK 0 -#define EXIT_FAIL 1 -#define EXIT_FAIL_OPTION 2 -#define EXIT_FAIL_XDP 3 -#define EXIT_FAIL_BPF 4 -#define EXIT_FAIL_MEM 5 +DEFINE_SAMPLE_INIT(xdp_redirect_cpu); static const struct option long_options[] = { - {"help", no_argument, NULL, 'h' }, - {"dev", required_argument, NULL, 'd' }, - {"skb-mode", no_argument, NULL, 'S' }, - {"sec", required_argument, NULL, 's' }, - {"progname", required_argument, NULL, 'p' }, - {"qsize", required_argument, NULL, 'q' }, - {"cpu", required_argument, NULL, 'c' }, - {"stress-mode", no_argument, NULL, 'x' }, - {"no-separators", no_argument, NULL, 'z' }, - {"force", no_argument, NULL, 'F' }, - {"mprog-disable", no_argument, NULL, 'n' }, - {"mprog-name", required_argument, NULL, 'e' }, - {"mprog-filename", required_argument, NULL, 'f' }, - {"redirect-device", required_argument, NULL, 'r' }, - {"redirect-map", required_argument, NULL, 'm' }, - {0, 0, NULL, 0 } + { "help", no_argument, NULL, 'h' }, + { "dev", required_argument, NULL, 'd' }, + { "skb-mode", no_argument, NULL, 'S' }, + { "progname", required_argument, NULL, 'p' }, + { "qsize", required_argument, NULL, 'q' }, + { "cpu", required_argument, NULL, 'c' }, + { "stress-mode", no_argument, NULL, 'x' }, + { "force", no_argument, NULL, 'F' }, + { "interval", required_argument, NULL, 'i' }, + { "verbose", no_argument, NULL, 'v' }, + { "stats", no_argument, NULL, 's' }, + { "mprog-name", required_argument, NULL, 'e' }, + { "mprog-filename", required_argument, NULL, 'f' }, + { "redirect-device", required_argument, NULL, 'r' }, + { "redirect-map", required_argument, NULL, 'm' }, + {} }; -static void int_exit(int sig) -{ - __u32 curr_prog_id = 0; - - if (ifindex > -1) { - if (bpf_get_link_xdp_id(ifindex, &curr_prog_id, xdp_flags)) { - printf("bpf_get_link_xdp_id failed\n"); - exit(EXIT_FAIL); - } - if (prog_id == curr_prog_id) { - fprintf(stderr, - "Interrupted: Removing XDP program on ifindex:%d device:%s\n", - ifindex, ifname); - bpf_set_link_xdp_fd(ifindex, -1, xdp_flags); - } else if (!curr_prog_id) { - printf("couldn't find a prog id on a given iface\n"); - } else { - printf("program on interface changed, not removing\n"); - } - } - /* Detach tracepoints */ - while (tp_cnt) - bpf_link__destroy(tp_links[--tp_cnt]); - - exit(EXIT_OK); -} - static void print_avail_progs(struct bpf_object *obj) { struct bpf_program *pos; + printf(" Programs to be used for -p/--progname:\n"); bpf_object__for_each_program(pos, obj) { - if (bpf_program__is_xdp(pos)) - printf(" %s\n", bpf_program__section_name(pos)); - } -} - -static void usage(char *argv[], struct bpf_object *obj) -{ - int i; - - printf("\nDOCUMENTATION:\n%s\n", __doc__); - printf("\n"); - printf(" Usage: %s (options-see-below)\n", argv[0]); - printf(" Listing options:\n"); - for (i = 0; long_options[i].name != 0; i++) { - printf(" --%-12s", long_options[i].name); - if (long_options[i].flag != NULL) - printf(" flag (internal value:%d)", - *long_options[i].flag); - else - printf(" short-option: -%c", - long_options[i].val); - printf("\n"); - } - printf("\n Programs to be used for --progname:\n"); - print_avail_progs(obj); - printf("\n"); -} - -/* gettime returns the current time of day in nanoseconds. - * Cost: clock_gettime (ns) => 26ns (CLOCK_MONOTONIC) - * clock_gettime (ns) => 9ns (CLOCK_MONOTONIC_COARSE) - */ -#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; -} - -/* Common stats data record shared with _kern.c */ -struct datarec { - __u64 processed; - __u64 dropped; - __u64 issue; - __u64 xdp_pass; - __u64 xdp_drop; - __u64 xdp_redirect; -}; -struct record { - __u64 timestamp; - struct datarec total; - struct datarec *cpu; -}; -struct stats_record { - struct record rx_cnt; - struct record redir_err; - struct record kthread; - struct record exception; - struct record enq[]; -}; - -static bool map_collect_percpu(int fd, __u32 key, struct record *rec) -{ - /* 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_xdp_redirect = 0; - __u64 sum_xdp_pass = 0; - __u64 sum_xdp_drop = 0; - __u64 sum_processed = 0; - __u64 sum_dropped = 0; - __u64 sum_issue = 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 false; - } - /* Get time as close as possible to reading map contents */ - rec->timestamp = gettime(); - - /* Record and sum values from each CPU */ - for (i = 0; i < nr_cpus; i++) { - rec->cpu[i].processed = values[i].processed; - sum_processed += values[i].processed; - rec->cpu[i].dropped = values[i].dropped; - sum_dropped += values[i].dropped; - rec->cpu[i].issue = values[i].issue; - sum_issue += values[i].issue; - rec->cpu[i].xdp_pass = values[i].xdp_pass; - sum_xdp_pass += values[i].xdp_pass; - rec->cpu[i].xdp_drop = values[i].xdp_drop; - sum_xdp_drop += values[i].xdp_drop; - rec->cpu[i].xdp_redirect = values[i].xdp_redirect; - sum_xdp_redirect += values[i].xdp_redirect; - } - rec->total.processed = sum_processed; - rec->total.dropped = sum_dropped; - rec->total.issue = sum_issue; - rec->total.xdp_pass = sum_xdp_pass; - rec->total.xdp_drop = sum_xdp_drop; - rec->total.xdp_redirect = sum_xdp_redirect; - return true; -} - -static struct datarec *alloc_record_per_cpu(void) -{ - unsigned int nr_cpus = bpf_num_possible_cpus(); - struct datarec *array; - - array = calloc(nr_cpus, sizeof(struct datarec)); - if (!array) { - fprintf(stderr, "Mem alloc error (nr_cpus:%u)\n", nr_cpus); - exit(EXIT_FAIL_MEM); - } - return array; -} - -static struct stats_record *alloc_stats_record(void) -{ - struct stats_record *rec; - int i, size; - - size = sizeof(*rec) + n_cpus * sizeof(struct record); - rec = malloc(size); - if (!rec) { - fprintf(stderr, "Mem alloc error\n"); - exit(EXIT_FAIL_MEM); - } - memset(rec, 0, size); - rec->rx_cnt.cpu = alloc_record_per_cpu(); - rec->redir_err.cpu = alloc_record_per_cpu(); - rec->kthread.cpu = alloc_record_per_cpu(); - rec->exception.cpu = alloc_record_per_cpu(); - for (i = 0; i < n_cpus; i++) - rec->enq[i].cpu = alloc_record_per_cpu(); - - return rec; -} - -static void free_stats_record(struct stats_record *r) -{ - int i; - - for (i = 0; i < n_cpus; i++) - free(r->enq[i].cpu); - free(r->exception.cpu); - free(r->kthread.cpu); - free(r->redir_err.cpu); - free(r->rx_cnt.cpu); - free(r); -} - -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 __u64 calc_pps(struct datarec *r, struct datarec *p, double period_) -{ - __u64 packets = 0; - __u64 pps = 0; - - if (period_ > 0) { - packets = r->processed - p->processed; - pps = packets / period_; - } - return pps; -} - -static __u64 calc_drop_pps(struct datarec *r, struct datarec *p, double period_) -{ - __u64 packets = 0; - __u64 pps = 0; - - if (period_ > 0) { - packets = r->dropped - p->dropped; - pps = packets / period_; - } - return pps; -} - -static __u64 calc_errs_pps(struct datarec *r, - struct datarec *p, double period_) -{ - __u64 packets = 0; - __u64 pps = 0; - - if (period_ > 0) { - packets = r->issue - p->issue; - pps = packets / period_; - } - return pps; -} - -static void calc_xdp_pps(struct datarec *r, struct datarec *p, - double *xdp_pass, double *xdp_drop, - double *xdp_redirect, double period_) -{ - *xdp_pass = 0, *xdp_drop = 0, *xdp_redirect = 0; - if (period_ > 0) { - *xdp_redirect = (r->xdp_redirect - p->xdp_redirect) / period_; - *xdp_pass = (r->xdp_pass - p->xdp_pass) / period_; - *xdp_drop = (r->xdp_drop - p->xdp_drop) / period_; - } -} - -static void stats_print(struct stats_record *stats_rec, - struct stats_record *stats_prev, - char *prog_name, char *mprog_name, int mprog_fd) -{ - unsigned int nr_cpus = bpf_num_possible_cpus(); - double pps = 0, drop = 0, err = 0; - bool mprog_enabled = false; - struct record *rec, *prev; - int to_cpu; - double t; - int i; - - if (mprog_fd > 0) - mprog_enabled = true; - - /* Header */ - printf("Running XDP/eBPF prog_name:%s\n", prog_name); - printf("%-15s %-7s %-14s %-11s %-9s\n", - "XDP-cpumap", "CPU:to", "pps", "drop-pps", "extra-info"); - - /* XDP rx_cnt */ - { - char *fmt_rx = "%-15s %-7d %'-14.0f %'-11.0f %'-10.0f %s\n"; - char *fm2_rx = "%-15s %-7s %'-14.0f %'-11.0f\n"; - char *errstr = ""; - - rec = &stats_rec->rx_cnt; - prev = &stats_prev->rx_cnt; - t = calc_period(rec, prev); - for (i = 0; i < nr_cpus; i++) { - struct datarec *r = &rec->cpu[i]; - struct datarec *p = &prev->cpu[i]; - - pps = calc_pps(r, p, t); - drop = calc_drop_pps(r, p, t); - err = calc_errs_pps(r, p, t); - if (err > 0) - errstr = "cpu-dest/err"; - if (pps > 0) - printf(fmt_rx, "XDP-RX", - i, pps, drop, err, errstr); - } - pps = calc_pps(&rec->total, &prev->total, t); - drop = calc_drop_pps(&rec->total, &prev->total, t); - err = calc_errs_pps(&rec->total, &prev->total, t); - printf(fm2_rx, "XDP-RX", "total", pps, drop); - } - - /* cpumap enqueue stats */ - for (to_cpu = 0; to_cpu < n_cpus; to_cpu++) { - char *fmt = "%-15s %3d:%-3d %'-14.0f %'-11.0f %'-10.2f %s\n"; - char *fm2 = "%-15s %3s:%-3d %'-14.0f %'-11.0f %'-10.2f %s\n"; - char *errstr = ""; - - rec = &stats_rec->enq[to_cpu]; - prev = &stats_prev->enq[to_cpu]; - t = calc_period(rec, prev); - for (i = 0; i < nr_cpus; i++) { - struct datarec *r = &rec->cpu[i]; - struct datarec *p = &prev->cpu[i]; - - pps = calc_pps(r, p, t); - drop = calc_drop_pps(r, p, t); - err = calc_errs_pps(r, p, t); - if (err > 0) { - errstr = "bulk-average"; - err = pps / err; /* calc average bulk size */ - } - if (pps > 0) - printf(fmt, "cpumap-enqueue", - i, to_cpu, pps, drop, err, errstr); - } - pps = calc_pps(&rec->total, &prev->total, t); - if (pps > 0) { - drop = calc_drop_pps(&rec->total, &prev->total, t); - err = calc_errs_pps(&rec->total, &prev->total, t); - if (err > 0) { - errstr = "bulk-average"; - err = pps / err; /* calc average bulk size */ - } - printf(fm2, "cpumap-enqueue", - "sum", to_cpu, pps, drop, err, errstr); - } - } - - /* cpumap kthread stats */ - { - char *fmt_k = "%-15s %-7d %'-14.0f %'-11.0f %'-10.0f %s\n"; - char *fm2_k = "%-15s %-7s %'-14.0f %'-11.0f %'-10.0f %s\n"; - char *e_str = ""; - - rec = &stats_rec->kthread; - prev = &stats_prev->kthread; - t = calc_period(rec, prev); - for (i = 0; i < nr_cpus; i++) { - struct datarec *r = &rec->cpu[i]; - struct datarec *p = &prev->cpu[i]; - - pps = calc_pps(r, p, t); - drop = calc_drop_pps(r, p, t); - err = calc_errs_pps(r, p, t); - if (err > 0) - e_str = "sched"; - if (pps > 0) - printf(fmt_k, "cpumap_kthread", - i, pps, drop, err, e_str); - } - pps = calc_pps(&rec->total, &prev->total, t); - drop = calc_drop_pps(&rec->total, &prev->total, t); - err = calc_errs_pps(&rec->total, &prev->total, t); - if (err > 0) - e_str = "sched-sum"; - printf(fm2_k, "cpumap_kthread", "total", pps, drop, err, e_str); - } - - /* XDP redirect err tracepoints (very unlikely) */ - { - char *fmt_err = "%-15s %-7d %'-14.0f %'-11.0f\n"; - char *fm2_err = "%-15s %-7s %'-14.0f %'-11.0f\n"; - - rec = &stats_rec->redir_err; - prev = &stats_prev->redir_err; - t = calc_period(rec, prev); - for (i = 0; i < nr_cpus; i++) { - struct datarec *r = &rec->cpu[i]; - struct datarec *p = &prev->cpu[i]; - - pps = calc_pps(r, p, t); - drop = calc_drop_pps(r, p, t); - if (pps > 0) - printf(fmt_err, "redirect_err", i, pps, drop); - } - pps = calc_pps(&rec->total, &prev->total, t); - drop = calc_drop_pps(&rec->total, &prev->total, t); - printf(fm2_err, "redirect_err", "total", pps, drop); - } - - /* XDP general exception tracepoints */ - { - char *fmt_err = "%-15s %-7d %'-14.0f %'-11.0f\n"; - char *fm2_err = "%-15s %-7s %'-14.0f %'-11.0f\n"; - - rec = &stats_rec->exception; - prev = &stats_prev->exception; - t = calc_period(rec, prev); - for (i = 0; i < nr_cpus; i++) { - struct datarec *r = &rec->cpu[i]; - struct datarec *p = &prev->cpu[i]; - - pps = calc_pps(r, p, t); - drop = calc_drop_pps(r, p, t); - if (pps > 0) - printf(fmt_err, "xdp_exception", i, pps, drop); - } - pps = calc_pps(&rec->total, &prev->total, t); - drop = calc_drop_pps(&rec->total, &prev->total, t); - printf(fm2_err, "xdp_exception", "total", pps, drop); - } - - /* CPUMAP attached XDP program that runs on remote/destination CPU */ - if (mprog_enabled) { - char *fmt_k = "%-15s %-7d %'-14.0f %'-11.0f %'-10.0f\n"; - char *fm2_k = "%-15s %-7s %'-14.0f %'-11.0f %'-10.0f\n"; - double xdp_pass, xdp_drop, xdp_redirect; - - printf("\n2nd remote XDP/eBPF prog_name: %s\n", mprog_name); - printf("%-15s %-7s %-14s %-11s %-9s\n", - "XDP-cpumap", "CPU:to", "xdp-pass", "xdp-drop", "xdp-redir"); - - rec = &stats_rec->kthread; - prev = &stats_prev->kthread; - t = calc_period(rec, prev); - for (i = 0; i < nr_cpus; i++) { - struct datarec *r = &rec->cpu[i]; - struct datarec *p = &prev->cpu[i]; - - calc_xdp_pps(r, p, &xdp_pass, &xdp_drop, - &xdp_redirect, t); - if (xdp_pass > 0 || xdp_drop > 0 || xdp_redirect > 0) - printf(fmt_k, "xdp-in-kthread", i, xdp_pass, xdp_drop, - xdp_redirect); + if (bpf_program__is_xdp(pos)) { + if (!strncmp(bpf_program__name(pos), "xdp_prognum", + sizeof("xdp_prognum") - 1)) + printf(" %s\n", bpf_program__name(pos)); } - calc_xdp_pps(&rec->total, &prev->total, &xdp_pass, &xdp_drop, - &xdp_redirect, t); - printf(fm2_k, "xdp-in-kthread", "total", xdp_pass, xdp_drop, xdp_redirect); } - - printf("\n"); - fflush(stdout); } -static void stats_collect(struct stats_record *rec) +static void usage(char *argv[], const struct option *long_options, + const char *doc, int mask, bool error, struct bpf_object *obj) { - int fd, i; - - fd = map_fds[RX_CNT]; - map_collect_percpu(fd, 0, &rec->rx_cnt); - - fd = map_fds[REDIRECT_ERR_CNT]; - map_collect_percpu(fd, 1, &rec->redir_err); - - fd = map_fds[CPUMAP_ENQUEUE_CNT]; - for (i = 0; i < n_cpus; i++) - map_collect_percpu(fd, i, &rec->enq[i]); - - fd = map_fds[CPUMAP_KTHREAD_CNT]; - map_collect_percpu(fd, 0, &rec->kthread); - - fd = map_fds[EXCEPTION_CNT]; - map_collect_percpu(fd, 0, &rec->exception); -} - - -/* Pointer swap trick */ -static inline void swap(struct stats_record **a, struct stats_record **b) -{ - struct stats_record *tmp; - - tmp = *a; - *a = *b; - *b = tmp; + sample_usage(argv, long_options, doc, mask, error); + print_avail_progs(obj); } static int create_cpu_entry(__u32 cpu, struct bpf_cpumap_val *value, @@ -582,39 +95,41 @@ static int create_cpu_entry(__u32 cpu, struct bpf_cpumap_val *value, /* Add a CPU entry to cpumap, as this allocate a cpu entry in * the kernel for the cpu. */ - ret = bpf_map_update_elem(map_fds[CPU_MAP], &cpu, value, 0); - if (ret) { - fprintf(stderr, "Create CPU entry failed (err:%d)\n", ret); - exit(EXIT_FAIL_BPF); + ret = bpf_map_update_elem(map_fd, &cpu, value, 0); + if (ret < 0) { + fprintf(stderr, "Create CPU entry failed: %s\n", strerror(errno)); + return ret; } /* Inform bpf_prog's that a new CPU is available to select * from via some control maps. */ - ret = bpf_map_update_elem(map_fds[CPUS_AVAILABLE], &avail_idx, &cpu, 0); - if (ret) { - fprintf(stderr, "Add to avail CPUs failed\n"); - exit(EXIT_FAIL_BPF); + ret = bpf_map_update_elem(avail_fd, &avail_idx, &cpu, 0); + if (ret < 0) { + fprintf(stderr, "Add to avail CPUs failed: %s\n", strerror(errno)); + return ret; } /* When not replacing/updating existing entry, bump the count */ - ret = bpf_map_lookup_elem(map_fds[CPUS_COUNT], &key, &curr_cpus_count); - if (ret) { - fprintf(stderr, "Failed reading curr cpus_count\n"); - exit(EXIT_FAIL_BPF); + ret = bpf_map_lookup_elem(count_fd, &key, &curr_cpus_count); + if (ret < 0) { + fprintf(stderr, "Failed reading curr cpus_count: %s\n", + strerror(errno)); + return ret; } if (new) { curr_cpus_count++; - ret = bpf_map_update_elem(map_fds[CPUS_COUNT], &key, + ret = bpf_map_update_elem(count_fd, &key, &curr_cpus_count, 0); - if (ret) { - fprintf(stderr, "Failed write curr cpus_count\n"); - exit(EXIT_FAIL_BPF); + if (ret < 0) { + fprintf(stderr, "Failed write curr cpus_count: %s\n", + strerror(errno)); + return ret; } } - /* map_fd[7] = cpus_iterator */ - printf("%s CPU:%u as idx:%u qsize:%d prog_fd: %d (cpus_count:%u)\n", - new ? "Add-new":"Replace", cpu, avail_idx, + + printf("%s CPU: %u as idx: %u qsize: %d cpumap_prog_fd: %d (cpus_count: %u)\n", + new ? "Add new" : "Replace", cpu, avail_idx, value->qsize, value->bpf_prog.fd, curr_cpus_count); return 0; @@ -623,24 +138,29 @@ static int create_cpu_entry(__u32 cpu, struct bpf_cpumap_val *value, /* CPUs are zero-indexed. Thus, add a special sentinel default value * in map cpus_available to mark CPU index'es not configured */ -static void mark_cpus_unavailable(void) +static int mark_cpus_unavailable(void) { + int ret, i, n_cpus = libbpf_num_possible_cpus(); __u32 invalid_cpu = n_cpus; - int ret, i; for (i = 0; i < n_cpus; i++) { - ret = bpf_map_update_elem(map_fds[CPUS_AVAILABLE], &i, + ret = bpf_map_update_elem(avail_fd, &i, &invalid_cpu, 0); - if (ret) { - fprintf(stderr, "Failed marking CPU unavailable\n"); - exit(EXIT_FAIL_BPF); + if (ret < 0) { + fprintf(stderr, "Failed marking CPU unavailable: %s\n", + strerror(errno)); + return ret; } } + + return 0; } /* Stress cpumap management code by concurrently changing underlying cpumap */ -static void stress_cpumap(struct bpf_cpumap_val *value) +static void stress_cpumap(void *ctx) { + struct bpf_cpumap_val *value = ctx; + /* Changing qsize will cause kernel to free and alloc a new * bpf_cpu_map_entry, with an associated/complicated tear-down * procedure. @@ -653,220 +173,263 @@ static void stress_cpumap(struct bpf_cpumap_val *value) create_cpu_entry(1, value, 0, false); } -static void stats_poll(int interval, bool use_separators, char *prog_name, - char *mprog_name, struct bpf_cpumap_val *value, - bool stress_mode) +static int set_cpumap_prog(struct xdp_redirect_cpu *skel, + const char *redir_interface, const char *redir_map, + const char *mprog_filename, const char *mprog_name) { - struct stats_record *record, *prev; - int mprog_fd; - - record = alloc_stats_record(); - prev = alloc_stats_record(); - stats_collect(record); - - /* Trick to pretty printf with thousands separators use %' */ - if (use_separators) - setlocale(LC_NUMERIC, "en_US"); - - while (1) { - swap(&prev, &record); - mprog_fd = value->bpf_prog.fd; - stats_collect(record); - stats_print(record, prev, prog_name, mprog_name, mprog_fd); - sleep(interval); - if (stress_mode) - stress_cpumap(value); - } - - free_stats_record(record); - free_stats_record(prev); -} - -static int init_tracepoints(struct bpf_object *obj) -{ - struct bpf_program *prog; - - bpf_object__for_each_program(prog, obj) { - if (bpf_program__is_tracepoint(prog) != true) - continue; - - tp_links[tp_cnt] = bpf_program__attach(prog); - if (libbpf_get_error(tp_links[tp_cnt])) { - tp_links[tp_cnt] = NULL; - return -EINVAL; + if (mprog_filename) { + struct bpf_program *prog; + struct bpf_object *obj; + int ret; + + if (!mprog_name) { + fprintf(stderr, "BPF program not specified for file %s\n", + mprog_filename); + goto end; + } + if ((redir_interface && !redir_map) || (!redir_interface && redir_map)) { + fprintf(stderr, "--redirect-%s specified but --redirect-%s not specified\n", + redir_interface ? "device" : "map", redir_interface ? "map" : "device"); + goto end; } - tp_cnt++; - } - - return 0; -} - -static int init_map_fds(struct bpf_object *obj) -{ - enum map_type type; - - for (type = 0; type < NUM_MAP; type++) { - map_fds[type] = - bpf_object__find_map_fd_by_name(obj, - map_type_strings[type]); - - if (map_fds[type] < 0) - return -ENOENT; - } - - return 0; -} -static int load_cpumap_prog(char *file_name, char *prog_name, - char *redir_interface, char *redir_map) -{ - struct bpf_prog_load_attr prog_load_attr = { - .prog_type = BPF_PROG_TYPE_XDP, - .expected_attach_type = BPF_XDP_CPUMAP, - .file = file_name, - }; - struct bpf_program *prog; - struct bpf_object *obj; - int fd; + /* Custom BPF program */ + obj = bpf_object__open_file(mprog_filename, NULL); + if (!obj) { + ret = -errno; + fprintf(stderr, "Failed to bpf_prog_load_xattr: %s\n", + strerror(errno)); + return ret; + } - if (bpf_prog_load_xattr(&prog_load_attr, &obj, &fd)) - return -1; + ret = bpf_object__load(obj); + if (ret < 0) { + ret = -errno; + fprintf(stderr, "Failed to bpf_object__load: %s\n", + strerror(errno)); + return ret; + } - if (fd < 0) { - fprintf(stderr, "ERR: bpf_prog_load_xattr: %s\n", - strerror(errno)); - return fd; - } + if (redir_map) { + int err, redir_map_fd, ifindex_out, key = 0; - if (redir_interface && redir_map) { - int err, map_fd, ifindex_out, key = 0; + redir_map_fd = bpf_object__find_map_fd_by_name(obj, redir_map); + if (redir_map_fd < 0) { + fprintf(stderr, "Failed to bpf_object__find_map_fd_by_name: %s\n", + strerror(errno)); + return redir_map_fd; + } - map_fd = bpf_object__find_map_fd_by_name(obj, redir_map); - if (map_fd < 0) - return map_fd; + ifindex_out = if_nametoindex(redir_interface); + if (!ifindex_out) + ifindex_out = strtoul(redir_interface, NULL, 0); + if (!ifindex_out) { + fprintf(stderr, "Bad interface name or index\n"); + return -EINVAL; + } - ifindex_out = if_nametoindex(redir_interface); - if (!ifindex_out) - return -1; + err = bpf_map_update_elem(redir_map_fd, &key, &ifindex_out, 0); + if (err < 0) + return err; + } - err = bpf_map_update_elem(map_fd, &key, &ifindex_out, 0); - if (err < 0) - return err; - } + prog = bpf_object__find_program_by_name(obj, mprog_name); + if (!prog) { + ret = -errno; + fprintf(stderr, "Failed to bpf_object__find_program_by_name: %s\n", + strerror(errno)); + return ret; + } - prog = bpf_object__find_program_by_title(obj, prog_name); - if (!prog) { - fprintf(stderr, "bpf_object__find_program_by_title failed\n"); - return EXIT_FAIL; + return bpf_program__fd(prog); + } else { + if (mprog_name) { + if (redir_interface || redir_map) { + fprintf(stderr, "Need to specify --mprog-filename/-f\n"); + goto end; + } + if (!strcmp(mprog_name, "pass") || !strcmp(mprog_name, "drop")) { + /* Use built-in pass/drop programs */ + return *mprog_name == 'p' ? bpf_program__fd(skel->progs.xdp_redirect_cpu_pass) + : bpf_program__fd(skel->progs.xdp_redirect_cpu_drop); + } else { + fprintf(stderr, "Unknown name \"%s\" for built-in BPF program\n", + mprog_name); + goto end; + } + } else { + if (redir_map) { + fprintf(stderr, "Need to specify --mprog-filename, --mprog-name and" + " --redirect-device with --redirect-map\n"); + goto end; + } + if (redir_interface) { + /* Use built-in devmap redirect */ + struct bpf_devmap_val val = {}; + int ifindex_out, err; + __u32 key = 0; + + if (!redir_interface) + return 0; + + ifindex_out = if_nametoindex(redir_interface); + if (!ifindex_out) + ifindex_out = strtoul(redir_interface, NULL, 0); + if (!ifindex_out) { + fprintf(stderr, "Bad interface name or index\n"); + return -EINVAL; + } + + if (get_mac_addr(ifindex_out, skel->bss->tx_mac_addr) < 0) { + printf("Get interface %d mac failed\n", ifindex_out); + return -EINVAL; + } + + val.ifindex = ifindex_out; + val.bpf_prog.fd = bpf_program__fd(skel->progs.xdp_redirect_egress_prog); + err = bpf_map_update_elem(bpf_map__fd(skel->maps.tx_port), &key, &val, 0); + if (err < 0) + return -errno; + + return bpf_program__fd(skel->progs.xdp_redirect_cpu_devmap); + } + } } - return bpf_program__fd(prog); + /* Disabled */ + return 0; +end: + fprintf(stderr, "Invalid options for CPUMAP BPF program\n"); + return -EINVAL; } int main(int argc, char **argv) { - char *prog_name = "xdp_cpu_map5_lb_hash_ip_pairs"; - char *mprog_filename = "xdp_redirect_kern.o"; - char *redir_interface = NULL, *redir_map = NULL; - char *mprog_name = "xdp_redirect_dummy"; - bool mprog_disable = false; - struct bpf_prog_load_attr prog_load_attr = { - .prog_type = BPF_PROG_TYPE_UNSPEC, - }; - struct bpf_prog_info info = {}; - __u32 info_len = sizeof(info); + const char *redir_interface = NULL, *redir_map = NULL; + const char *mprog_filename = NULL, *mprog_name = NULL; + struct xdp_redirect_cpu *skel; + struct bpf_map_info info = {}; + char ifname_buf[IF_NAMESIZE]; struct bpf_cpumap_val value; - bool use_separators = true; + __u32 infosz = sizeof(info); + int ret = EXIT_FAIL_OPTION; + unsigned long interval = 2; bool stress_mode = false; struct bpf_program *prog; - struct bpf_object *obj; - int err = EXIT_FAIL; - char filename[256]; + const char *prog_name; + bool generic = false; + bool force = false; int added_cpus = 0; + bool error = true; int longindex = 0; - int interval = 2; int add_cpu = -1; - int opt, prog_fd; - int *cpu, i; + int ifindex = -1; + int *cpu, i, opt; + char *ifname; __u32 qsize; - - n_cpus = get_nprocs_conf(); - - /* Notice: choosing he queue size is very important with the - * ixgbe driver, because it's driver page recycling trick is - * dependend on pages being returned quickly. The number of - * out-standing packets in the system must be less-than 2x - * RX-ring size. + int n_cpus; + + n_cpus = libbpf_num_possible_cpus(); + + /* Notice: Choosing the queue size is very important when CPU is + * configured with power-saving states. + * + * If deepest state take 133 usec to wakeup from (133/10^6). When link + * speed is 10Gbit/s ((10*10^9/8) in bytes/sec). How many bytes can + * arrive with in 133 usec at this speed: (10*10^9/8)*(133/10^6) = + * 166250 bytes. With MTU size packets this is 110 packets, and with + * minimum Ethernet (MAC-preamble + intergap) 84 bytes is 1979 packets. + * + * Setting default cpumap queue to 2048 as worst-case (small packet) + * should be +64 packet due kthread wakeup call (due to xdp_do_flush) + * worst-case is 2043 packets. + * + * Sysadm can configured system to avoid deep-sleep via: + * tuned-adm profile network-latency */ - qsize = 128+64; - - snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); - prog_load_attr.file = filename; - - if (bpf_prog_load_xattr(&prog_load_attr, &obj, &prog_fd)) - return err; + qsize = 2048; - if (prog_fd < 0) { - fprintf(stderr, "ERR: bpf_prog_load_xattr: %s\n", + skel = xdp_redirect_cpu__open(); + if (!skel) { + fprintf(stderr, "Failed to xdp_redirect_cpu__open: %s\n", strerror(errno)); - return err; + ret = EXIT_FAIL_BPF; + goto end; + } + + ret = sample_init_pre_load(skel); + if (ret < 0) { + fprintf(stderr, "Failed to sample_init_pre_load: %s\n", strerror(-ret)); + ret = EXIT_FAIL_BPF; + goto end_destroy; } - if (init_tracepoints(obj) < 0) { - fprintf(stderr, "ERR: bpf_program__attach failed\n"); - return err; + if (bpf_map__set_max_entries(skel->maps.cpu_map, n_cpus) < 0) { + fprintf(stderr, "Failed to set max entries for cpu_map map: %s", + strerror(errno)); + ret = EXIT_FAIL_BPF; + goto end_destroy; } - if (init_map_fds(obj) < 0) { - fprintf(stderr, "bpf_object__find_map_fd_by_name failed\n"); - return err; + if (bpf_map__set_max_entries(skel->maps.cpus_available, n_cpus) < 0) { + fprintf(stderr, "Failed to set max entries for cpus_available map: %s", + strerror(errno)); + ret = EXIT_FAIL_BPF; + goto end_destroy; } - mark_cpus_unavailable(); - cpu = malloc(n_cpus * sizeof(int)); + cpu = calloc(n_cpus, sizeof(int)); if (!cpu) { - fprintf(stderr, "failed to allocate cpu array\n"); - return err; + fprintf(stderr, "Failed to allocate cpu array\n"); + goto end_destroy; } - memset(cpu, 0, n_cpus * sizeof(int)); - /* Parse commands line args */ - while ((opt = getopt_long(argc, argv, "hSd:s:p:q:c:xzFf:e:r:m:", + prog = skel->progs.xdp_prognum5_lb_hash_ip_pairs; + while ((opt = getopt_long(argc, argv, "d:si:Sxp:f:e:r:m:c:q:Fvh", long_options, &longindex)) != -1) { switch (opt) { case 'd': if (strlen(optarg) >= IF_NAMESIZE) { - fprintf(stderr, "ERR: --dev name too long\n"); - goto error; + fprintf(stderr, "-d/--dev name too long\n"); + goto end_cpu; } ifname = (char *)&ifname_buf; - strncpy(ifname, optarg, IF_NAMESIZE); + safe_strncpy(ifname, optarg, sizeof(ifname)); ifindex = if_nametoindex(ifname); - if (ifindex == 0) { - fprintf(stderr, - "ERR: --dev name unknown err(%d):%s\n", + if (!ifindex) + ifindex = strtoul(optarg, NULL, 0); + if (!ifindex) { + fprintf(stderr, "Bad interface index or name (%d): %s\n", errno, strerror(errno)); - goto error; + usage(argv, long_options, __doc__, mask, true, skel->obj); + goto end_cpu; } break; case 's': - interval = atoi(optarg); + mask |= SAMPLE_REDIRECT_MAP_CNT; + break; + case 'i': + interval = strtoul(optarg, NULL, 0); break; case 'S': - xdp_flags |= XDP_FLAGS_SKB_MODE; + generic = true; break; case 'x': stress_mode = true; break; - case 'z': - use_separators = false; - break; case 'p': /* Selecting eBPF prog to load */ prog_name = optarg; - break; - case 'n': - mprog_disable = true; + prog = bpf_object__find_program_by_name(skel->obj, + prog_name); + if (!prog) { + fprintf(stderr, + "Failed to find program %s specified by" + " option -p/--progname\n", + prog_name); + print_avail_progs(skel->obj); + goto end_cpu; + } break; case 'f': mprog_filename = optarg; @@ -876,6 +439,7 @@ int main(int argc, char **argv) break; case 'r': redir_interface = optarg; + mask |= SAMPLE_DEVMAP_XMIT_CNT_MULTI; break; case 'm': redir_map = optarg; @@ -885,93 +449,115 @@ int main(int argc, char **argv) add_cpu = strtoul(optarg, NULL, 0); if (add_cpu >= n_cpus) { fprintf(stderr, - "--cpu nr too large for cpumap err(%d):%s\n", + "--cpu nr too large for cpumap err (%d):%s\n", errno, strerror(errno)); - goto error; + usage(argv, long_options, __doc__, mask, true, skel->obj); + goto end_cpu; } cpu[added_cpus++] = add_cpu; break; case 'q': - qsize = atoi(optarg); + qsize = strtoul(optarg, NULL, 0); break; case 'F': - xdp_flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST; + force = true; + break; + case 'v': + sample_switch_mode(); break; case 'h': - error: + error = false; default: - free(cpu); - usage(argv, obj); - return EXIT_FAIL_OPTION; + usage(argv, long_options, __doc__, mask, error, skel->obj); + goto end_cpu; } } - if (!(xdp_flags & XDP_FLAGS_SKB_MODE)) - xdp_flags |= XDP_FLAGS_DRV_MODE; - - /* Required option */ + ret = EXIT_FAIL_OPTION; if (ifindex == -1) { - fprintf(stderr, "ERR: required option --dev missing\n"); - usage(argv, obj); - err = EXIT_FAIL_OPTION; - goto out; + fprintf(stderr, "Required option --dev missing\n"); + usage(argv, long_options, __doc__, mask, true, skel->obj); + goto end_cpu; } - /* Required option */ + if (add_cpu == -1) { - fprintf(stderr, "ERR: required option --cpu missing\n"); - fprintf(stderr, " Specify multiple --cpu option to add more\n"); - usage(argv, obj); - err = EXIT_FAIL_OPTION; - goto out; + fprintf(stderr, "Required option --cpu missing\n" + "Specify multiple --cpu option to add more\n"); + usage(argv, long_options, __doc__, mask, true, skel->obj); + goto end_cpu; } - value.bpf_prog.fd = 0; - if (!mprog_disable) - value.bpf_prog.fd = load_cpumap_prog(mprog_filename, mprog_name, - redir_interface, redir_map); - if (value.bpf_prog.fd < 0) { - err = value.bpf_prog.fd; - goto out; + skel->rodata->from_match[0] = ifindex; + if (redir_interface) + skel->rodata->to_match[0] = if_nametoindex(redir_interface); + + ret = xdp_redirect_cpu__load(skel); + if (ret < 0) { + fprintf(stderr, "Failed to xdp_redirect_cpu__load: %s\n", + strerror(errno)); + goto end_cpu; } - value.qsize = qsize; - for (i = 0; i < added_cpus; i++) - create_cpu_entry(cpu[i], &value, i, true); + ret = bpf_obj_get_info_by_fd(bpf_map__fd(skel->maps.cpu_map), &info, &infosz); + if (ret < 0) { + fprintf(stderr, "Failed bpf_obj_get_info_by_fd for cpumap: %s\n", + strerror(errno)); + goto end_cpu; + } - /* Remove XDP program when program is interrupted or killed */ - signal(SIGINT, int_exit); - signal(SIGTERM, int_exit); + skel->bss->cpumap_map_id = info.id; - prog = bpf_object__find_program_by_title(obj, prog_name); - if (!prog) { - fprintf(stderr, "bpf_object__find_program_by_title failed\n"); - goto out; + map_fd = bpf_map__fd(skel->maps.cpu_map); + avail_fd = bpf_map__fd(skel->maps.cpus_available); + count_fd = bpf_map__fd(skel->maps.cpus_count); + + ret = mark_cpus_unavailable(); + if (ret < 0) { + fprintf(stderr, "Unable to mark CPUs as unavailable\n"); + goto end_cpu; } - prog_fd = bpf_program__fd(prog); - if (prog_fd < 0) { - fprintf(stderr, "bpf_program__fd failed\n"); - goto out; + ret = sample_init(skel, mask); + if (ret < 0) { + fprintf(stderr, "Failed to initialize sample: %s\n", strerror(-ret)); + ret = EXIT_FAIL; + goto end_cpu; } - if (bpf_set_link_xdp_fd(ifindex, prog_fd, xdp_flags) < 0) { - fprintf(stderr, "link set xdp fd failed\n"); - err = EXIT_FAIL_XDP; - goto out; + value.bpf_prog.fd = set_cpumap_prog(skel, redir_interface, redir_map, + mprog_filename, mprog_name); + if (value.bpf_prog.fd < 0) { + fprintf(stderr, "Failed to set CPUMAP BPF program: %s\n", + strerror(-value.bpf_prog.fd)); + usage(argv, long_options, __doc__, mask, true, skel->obj); + ret = EXIT_FAIL_BPF; + goto end_cpu; } + value.qsize = qsize; - err = bpf_obj_get_info_by_fd(prog_fd, &info, &info_len); - if (err) { - printf("can't get prog info - %s\n", strerror(errno)); - goto out; + for (i = 0; i < added_cpus; i++) { + if (create_cpu_entry(cpu[i], &value, i, true) < 0) { + fprintf(stderr, "Cannot proceed, exiting\n"); + usage(argv, long_options, __doc__, mask, true, skel->obj); + goto end_cpu; + } } - prog_id = info.id; - stats_poll(interval, use_separators, prog_name, mprog_name, - &value, stress_mode); + ret = EXIT_FAIL_XDP; + if (sample_install_xdp(prog, ifindex, generic, force) < 0) + goto end_cpu; - err = EXIT_OK; -out: + ret = sample_run(interval, stress_mode ? stress_cpumap : NULL, &value); + if (ret < 0) { + fprintf(stderr, "Failed during sample run: %s\n", strerror(-ret)); + ret = EXIT_FAIL; + goto end_cpu; + } + ret = EXIT_OK; +end_cpu: free(cpu); - return err; +end_destroy: + xdp_redirect_cpu__destroy(skel); +end: + sample_exit(ret); } diff --git a/samples/bpf/xdp_redirect_kern.c b/samples/bpf/xdp_redirect_kern.c deleted file mode 100644 index d26ec3aa215e..000000000000 --- a/samples/bpf/xdp_redirect_kern.c +++ /dev/null @@ -1,90 +0,0 @@ -/* Copyright (c) 2016 John Fastabend <john.r.fastabend@intel.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. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - */ -#define KBUILD_MODNAME "foo" -#include <uapi/linux/bpf.h> -#include <linux/in.h> -#include <linux/if_ether.h> -#include <linux/if_packet.h> -#include <linux/if_vlan.h> -#include <linux/ip.h> -#include <linux/ipv6.h> -#include <bpf/bpf_helpers.h> - -struct { - __uint(type, BPF_MAP_TYPE_ARRAY); - __type(key, int); - __type(value, int); - __uint(max_entries, 1); -} tx_port SEC(".maps"); - -/* Count RX packets, as XDP bpf_prog doesn't get direct TX-success - * feedback. Redirect TX errors can be caught via a tracepoint. - */ -struct { - __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY); - __type(key, u32); - __type(value, long); - __uint(max_entries, 1); -} rxcnt SEC(".maps"); - -static void swap_src_dst_mac(void *data) -{ - unsigned short *p = data; - unsigned short dst[3]; - - dst[0] = p[0]; - dst[1] = p[1]; - dst[2] = p[2]; - p[0] = p[3]; - p[1] = p[4]; - p[2] = p[5]; - p[3] = dst[0]; - p[4] = dst[1]; - p[5] = dst[2]; -} - -SEC("xdp_redirect") -int xdp_redirect_prog(struct xdp_md *ctx) -{ - void *data_end = (void *)(long)ctx->data_end; - void *data = (void *)(long)ctx->data; - struct ethhdr *eth = data; - int rc = XDP_DROP; - int *ifindex, port = 0; - long *value; - u32 key = 0; - u64 nh_off; - - nh_off = sizeof(*eth); - if (data + nh_off > data_end) - return rc; - - ifindex = bpf_map_lookup_elem(&tx_port, &port); - if (!ifindex) - return rc; - - value = bpf_map_lookup_elem(&rxcnt, &key); - if (value) - *value += 1; - - swap_src_dst_mac(data); - return bpf_redirect(*ifindex, 0); -} - -/* Redirect require an XDP bpf_prog loaded on the TX device */ -SEC("xdp_redirect_dummy") -int xdp_redirect_dummy_prog(struct xdp_md *ctx) -{ - return XDP_PASS; -} - -char _license[] SEC("license") = "GPL"; diff --git a/samples/bpf/xdp_redirect_map_kern.c b/samples/bpf/xdp_redirect_map.bpf.c index a92b8e567bdd..59efd656e1b2 100644 --- a/samples/bpf/xdp_redirect_map_kern.c +++ b/samples/bpf/xdp_redirect_map.bpf.c @@ -10,14 +10,10 @@ * General Public License for more details. */ #define KBUILD_MODNAME "foo" -#include <uapi/linux/bpf.h> -#include <linux/in.h> -#include <linux/if_ether.h> -#include <linux/if_packet.h> -#include <linux/if_vlan.h> -#include <linux/ip.h> -#include <linux/ipv6.h> -#include <bpf/bpf_helpers.h> + +#include "vmlinux.h" +#include "xdp_sample.bpf.h" +#include "xdp_sample_shared.h" /* The 2nd xdp prog on egress does not support skb mode, so we define two * maps, tx_port_general and tx_port_native. @@ -26,114 +22,71 @@ struct { __uint(type, BPF_MAP_TYPE_DEVMAP); __uint(key_size, sizeof(int)); __uint(value_size, sizeof(int)); - __uint(max_entries, 100); + __uint(max_entries, 1); } tx_port_general SEC(".maps"); struct { __uint(type, BPF_MAP_TYPE_DEVMAP); __uint(key_size, sizeof(int)); __uint(value_size, sizeof(struct bpf_devmap_val)); - __uint(max_entries, 100); -} tx_port_native SEC(".maps"); - -/* Count RX packets, as XDP bpf_prog doesn't get direct TX-success - * feedback. Redirect TX errors can be caught via a tracepoint. - */ -struct { - __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY); - __type(key, u32); - __type(value, long); - __uint(max_entries, 1); -} rxcnt SEC(".maps"); - -/* map to store egress interface mac address */ -struct { - __uint(type, BPF_MAP_TYPE_ARRAY); - __type(key, u32); - __type(value, __be64); __uint(max_entries, 1); -} tx_mac SEC(".maps"); - -static void swap_src_dst_mac(void *data) -{ - unsigned short *p = data; - unsigned short dst[3]; +} tx_port_native SEC(".maps"); - dst[0] = p[0]; - dst[1] = p[1]; - dst[2] = p[2]; - p[0] = p[3]; - p[1] = p[4]; - p[2] = p[5]; - p[3] = dst[0]; - p[4] = dst[1]; - p[5] = dst[2]; -} +/* store egress interface mac address */ +const volatile char tx_mac_addr[ETH_ALEN]; static __always_inline int xdp_redirect_map(struct xdp_md *ctx, void *redirect_map) { void *data_end = (void *)(long)ctx->data_end; void *data = (void *)(long)ctx->data; + u32 key = bpf_get_smp_processor_id(); struct ethhdr *eth = data; - int rc = XDP_DROP; - long *value; - u32 key = 0; + struct datarec *rec; u64 nh_off; - int vport; nh_off = sizeof(*eth); if (data + nh_off > data_end) - return rc; - - /* constant virtual port */ - vport = 0; - - /* count packet in global counter */ - value = bpf_map_lookup_elem(&rxcnt, &key); - if (value) - *value += 1; + return XDP_DROP; + rec = bpf_map_lookup_elem(&rx_cnt, &key); + if (!rec) + return XDP_PASS; + NO_TEAR_INC(rec->processed); swap_src_dst_mac(data); - - /* send packet out physical port */ - return bpf_redirect_map(redirect_map, vport, 0); + return bpf_redirect_map(redirect_map, 0, 0); } -SEC("xdp_redirect_general") +SEC("xdp") int xdp_redirect_map_general(struct xdp_md *ctx) { return xdp_redirect_map(ctx, &tx_port_general); } -SEC("xdp_redirect_native") +SEC("xdp") int xdp_redirect_map_native(struct xdp_md *ctx) { return xdp_redirect_map(ctx, &tx_port_native); } -SEC("xdp_devmap/map_prog") +SEC("xdp_devmap/egress") int xdp_redirect_map_egress(struct xdp_md *ctx) { void *data_end = (void *)(long)ctx->data_end; void *data = (void *)(long)ctx->data; struct ethhdr *eth = data; - __be64 *mac; - u32 key = 0; u64 nh_off; nh_off = sizeof(*eth); if (data + nh_off > data_end) return XDP_DROP; - mac = bpf_map_lookup_elem(&tx_mac, &key); - if (mac) - __builtin_memcpy(eth->h_source, mac, ETH_ALEN); + __builtin_memcpy(eth->h_source, (const char *)tx_mac_addr, ETH_ALEN); return XDP_PASS; } /* Redirect require an XDP bpf_prog loaded on the TX device */ -SEC("xdp_redirect_dummy") +SEC("xdp") int xdp_redirect_dummy_prog(struct xdp_md *ctx) { return XDP_PASS; diff --git a/samples/bpf/xdp_redirect_map_multi_kern.c b/samples/bpf/xdp_redirect_map_multi.bpf.c index 71aa23d1cb2b..8f59d430cb64 100644 --- a/samples/bpf/xdp_redirect_map_multi_kern.c +++ b/samples/bpf/xdp_redirect_map_multi.bpf.c @@ -1,11 +1,14 @@ // SPDX-License-Identifier: GPL-2.0 #define KBUILD_MODNAME "foo" -#include <uapi/linux/bpf.h> -#include <linux/in.h> -#include <linux/if_ether.h> -#include <linux/ip.h> -#include <linux/ipv6.h> -#include <bpf/bpf_helpers.h> + +#include "vmlinux.h" +#include "xdp_sample.bpf.h" +#include "xdp_sample_shared.h" + +enum { + BPF_F_BROADCAST = (1ULL << 3), + BPF_F_EXCLUDE_INGRESS = (1ULL << 4), +}; struct { __uint(type, BPF_MAP_TYPE_DEVMAP_HASH); @@ -21,50 +24,41 @@ struct { __uint(max_entries, 32); } forward_map_native SEC(".maps"); +/* map to store egress interfaces mac addresses */ struct { - __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY); - __type(key, u32); - __type(value, long); - __uint(max_entries, 1); -} rxcnt SEC(".maps"); - -/* map to store egress interfaces mac addresses, set the - * max_entries to 1 and extend it in user sapce prog. - */ -struct { - __uint(type, BPF_MAP_TYPE_ARRAY); + __uint(type, BPF_MAP_TYPE_HASH); __type(key, u32); __type(value, __be64); - __uint(max_entries, 1); + __uint(max_entries, 32); } mac_map SEC(".maps"); static int xdp_redirect_map(struct xdp_md *ctx, void *forward_map) { - long *value; - u32 key = 0; + u32 key = bpf_get_smp_processor_id(); + struct datarec *rec; - /* count packet in global counter */ - value = bpf_map_lookup_elem(&rxcnt, &key); - if (value) - *value += 1; + rec = bpf_map_lookup_elem(&rx_cnt, &key); + if (!rec) + return XDP_PASS; + NO_TEAR_INC(rec->processed); - return bpf_redirect_map(forward_map, key, + return bpf_redirect_map(forward_map, 0, BPF_F_BROADCAST | BPF_F_EXCLUDE_INGRESS); } -SEC("xdp_redirect_general") +SEC("xdp") int xdp_redirect_map_general(struct xdp_md *ctx) { return xdp_redirect_map(ctx, &forward_map_general); } -SEC("xdp_redirect_native") +SEC("xdp") int xdp_redirect_map_native(struct xdp_md *ctx) { return xdp_redirect_map(ctx, &forward_map_native); } -SEC("xdp_devmap/map_prog") +SEC("xdp_devmap/egress") int xdp_devmap_prog(struct xdp_md *ctx) { void *data_end = (void *)(long)ctx->data_end; diff --git a/samples/bpf/xdp_redirect_map_multi_user.c b/samples/bpf/xdp_redirect_map_multi_user.c index 84cdbbed20b7..315314716121 100644 --- a/samples/bpf/xdp_redirect_map_multi_user.c +++ b/samples/bpf/xdp_redirect_map_multi_user.c @@ -1,7 +1,12 @@ // SPDX-License-Identifier: GPL-2.0 +static const char *__doc__ = +"XDP multi redirect tool, using BPF_MAP_TYPE_DEVMAP and BPF_F_BROADCAST flag for bpf_redirect_map\n" +"Usage: xdp_redirect_map_multi <IFINDEX|IFNAME> <IFINDEX|IFNAME> ... <IFINDEX|IFNAME>\n"; + #include <linux/bpf.h> #include <linux/if_link.h> #include <assert.h> +#include <getopt.h> #include <errno.h> #include <signal.h> #include <stdio.h> @@ -15,106 +20,54 @@ #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> - -#include "bpf_util.h" +#include <linux/if_ether.h> #include <bpf/bpf.h> #include <bpf/libbpf.h> +#include "bpf_util.h" +#include "xdp_sample_user.h" +#include "xdp_redirect_map_multi.skel.h" #define MAX_IFACE_NUM 32 - -static __u32 xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST; static int ifaces[MAX_IFACE_NUM] = {}; -static int rxcnt_map_fd; - -static void int_exit(int sig) -{ - __u32 prog_id = 0; - int i; - - for (i = 0; ifaces[i] > 0; i++) { - if (bpf_get_link_xdp_id(ifaces[i], &prog_id, xdp_flags)) { - printf("bpf_get_link_xdp_id failed\n"); - exit(1); - } - if (prog_id) - bpf_set_link_xdp_fd(ifaces[i], -1, xdp_flags); - } - - exit(0); -} - -static void poll_stats(int interval) -{ - unsigned int nr_cpus = bpf_num_possible_cpus(); - __u64 values[nr_cpus], prev[nr_cpus]; - - memset(prev, 0, sizeof(prev)); - - while (1) { - __u64 sum = 0; - __u32 key = 0; - int i; - sleep(interval); - assert(bpf_map_lookup_elem(rxcnt_map_fd, &key, values) == 0); - for (i = 0; i < nr_cpus; i++) - sum += (values[i] - prev[i]); - if (sum) - printf("Forwarding %10llu pkt/s\n", sum / interval); - memcpy(prev, values, sizeof(values)); - } -} - -static int get_mac_addr(unsigned int ifindex, void *mac_addr) -{ - char ifname[IF_NAMESIZE]; - struct ifreq ifr; - int fd, ret = -1; - - fd = socket(AF_INET, SOCK_DGRAM, 0); - if (fd < 0) - return ret; - - if (!if_indextoname(ifindex, ifname)) - goto err_out; - - strcpy(ifr.ifr_name, ifname); +static int mask = SAMPLE_RX_CNT | SAMPLE_REDIRECT_ERR_MAP_CNT | + SAMPLE_EXCEPTION_CNT | SAMPLE_DEVMAP_XMIT_CNT | + SAMPLE_DEVMAP_XMIT_CNT_MULTI | SAMPLE_SKIP_HEADING; - if (ioctl(fd, SIOCGIFHWADDR, &ifr) != 0) - goto err_out; +DEFINE_SAMPLE_INIT(xdp_redirect_map_multi); - memcpy(mac_addr, ifr.ifr_hwaddr.sa_data, 6 * sizeof(char)); - ret = 0; +static const struct option long_options[] = { + { "help", no_argument, NULL, 'h' }, + { "skb-mode", no_argument, NULL, 'S' }, + { "force", no_argument, NULL, 'F' }, + { "load-egress", no_argument, NULL, 'X' }, + { "stats", no_argument, NULL, 's' }, + { "interval", required_argument, NULL, 'i' }, + { "verbose", no_argument, NULL, 'v' }, + {} +}; -err_out: - close(fd); - return ret; -} - -static int update_mac_map(struct bpf_object *obj) +static int update_mac_map(struct bpf_map *map) { - int i, ret = -1, mac_map_fd; + int mac_map_fd = bpf_map__fd(map); unsigned char mac_addr[6]; unsigned int ifindex; - - mac_map_fd = bpf_object__find_map_fd_by_name(obj, "mac_map"); - if (mac_map_fd < 0) { - printf("find mac map fd failed\n"); - return ret; - } + int i, ret = -1; for (i = 0; ifaces[i] > 0; i++) { ifindex = ifaces[i]; ret = get_mac_addr(ifindex, mac_addr); if (ret < 0) { - printf("get interface %d mac failed\n", ifindex); + fprintf(stderr, "get interface %d mac failed\n", + ifindex); return ret; } ret = bpf_map_update_elem(mac_map_fd, &ifindex, mac_addr, 0); - if (ret) { - perror("bpf_update_elem mac_map_fd"); + if (ret < 0) { + fprintf(stderr, "Failed to update mac address for ifindex %d\n", + ifindex); return ret; } } @@ -122,181 +75,159 @@ static int update_mac_map(struct bpf_object *obj) return 0; } -static void usage(const char *prog) -{ - fprintf(stderr, - "usage: %s [OPTS] <IFNAME|IFINDEX> <IFNAME|IFINDEX> ...\n" - "OPTS:\n" - " -S use skb-mode\n" - " -N enforce native mode\n" - " -F force loading prog\n" - " -X load xdp program on egress\n", - prog); -} - int main(int argc, char **argv) { - int i, ret, opt, forward_map_fd, max_ifindex = 0; - struct bpf_program *ingress_prog, *egress_prog; - int ingress_prog_fd, egress_prog_fd = 0; - struct bpf_devmap_val devmap_val; - bool attach_egress_prog = false; + struct bpf_devmap_val devmap_val = {}; + struct xdp_redirect_map_multi *skel; + struct bpf_program *ingress_prog; + bool xdp_devmap_attached = false; + struct bpf_map *forward_map; + int ret = EXIT_FAIL_OPTION; + unsigned long interval = 2; char ifname[IF_NAMESIZE]; - struct bpf_map *mac_map; - struct bpf_object *obj; unsigned int ifindex; - char filename[256]; - - while ((opt = getopt(argc, argv, "SNFX")) != -1) { + bool generic = false; + bool force = false; + bool tried = false; + bool error = true; + int i, opt; + + while ((opt = getopt_long(argc, argv, "hSFXi:vs", + long_options, NULL)) != -1) { switch (opt) { case 'S': - xdp_flags |= XDP_FLAGS_SKB_MODE; - break; - case 'N': - /* default, set below */ + generic = true; + /* devmap_xmit tracepoint not available */ + mask &= ~(SAMPLE_DEVMAP_XMIT_CNT | + SAMPLE_DEVMAP_XMIT_CNT_MULTI); break; case 'F': - xdp_flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST; + force = true; break; case 'X': - attach_egress_prog = true; + xdp_devmap_attached = true; + break; + case 'i': + interval = strtoul(optarg, NULL, 0); + break; + case 'v': + sample_switch_mode(); break; + case 's': + mask |= SAMPLE_REDIRECT_MAP_CNT; + break; + case 'h': + error = false; default: - usage(basename(argv[0])); - return 1; + sample_usage(argv, long_options, __doc__, mask, error); + return ret; } } - if (!(xdp_flags & XDP_FLAGS_SKB_MODE)) { - xdp_flags |= XDP_FLAGS_DRV_MODE; - } else if (attach_egress_prog) { - printf("Load xdp program on egress with SKB mode not supported yet\n"); - return 1; + if (argc <= optind + 1) { + sample_usage(argv, long_options, __doc__, mask, error); + return ret; } - if (optind == argc) { - printf("usage: %s <IFNAME|IFINDEX> <IFNAME|IFINDEX> ...\n", argv[0]); - return 1; + skel = xdp_redirect_map_multi__open(); + if (!skel) { + fprintf(stderr, "Failed to xdp_redirect_map_multi__open: %s\n", + strerror(errno)); + ret = EXIT_FAIL_BPF; + goto end; } - printf("Get interfaces"); + ret = sample_init_pre_load(skel); + if (ret < 0) { + fprintf(stderr, "Failed to sample_init_pre_load: %s\n", strerror(-ret)); + ret = EXIT_FAIL_BPF; + goto end_destroy; + } + + ret = EXIT_FAIL_OPTION; for (i = 0; i < MAX_IFACE_NUM && argv[optind + i]; i++) { ifaces[i] = if_nametoindex(argv[optind + i]); if (!ifaces[i]) ifaces[i] = strtoul(argv[optind + i], NULL, 0); if (!if_indextoname(ifaces[i], ifname)) { - perror("Invalid interface name or i"); - return 1; + fprintf(stderr, "Bad interface index or name\n"); + sample_usage(argv, long_options, __doc__, mask, true); + goto end_destroy; } - /* Find the largest index number */ - if (ifaces[i] > max_ifindex) - max_ifindex = ifaces[i]; - - printf(" %d", ifaces[i]); - } - printf("\n"); - - snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); - - obj = bpf_object__open(filename); - if (libbpf_get_error(obj)) { - printf("ERROR: opening BPF object file failed\n"); - obj = NULL; - goto err_out; + skel->rodata->from_match[i] = ifaces[i]; + skel->rodata->to_match[i] = ifaces[i]; } - /* Reset the map size to max ifindex + 1 */ - if (attach_egress_prog) { - mac_map = bpf_object__find_map_by_name(obj, "mac_map"); - ret = bpf_map__resize(mac_map, max_ifindex + 1); - if (ret < 0) { - printf("ERROR: reset mac map size failed\n"); - goto err_out; - } + ret = xdp_redirect_map_multi__load(skel); + if (ret < 0) { + fprintf(stderr, "Failed to xdp_redirect_map_multi__load: %s\n", + strerror(errno)); + ret = EXIT_FAIL_BPF; + goto end_destroy; } - /* load BPF program */ - if (bpf_object__load(obj)) { - printf("ERROR: loading BPF object file failed\n"); - goto err_out; - } - - if (xdp_flags & XDP_FLAGS_SKB_MODE) { - ingress_prog = bpf_object__find_program_by_name(obj, "xdp_redirect_map_general"); - forward_map_fd = bpf_object__find_map_fd_by_name(obj, "forward_map_general"); - } else { - ingress_prog = bpf_object__find_program_by_name(obj, "xdp_redirect_map_native"); - forward_map_fd = bpf_object__find_map_fd_by_name(obj, "forward_map_native"); - } - if (!ingress_prog || forward_map_fd < 0) { - printf("finding ingress_prog/forward_map in obj file failed\n"); - goto err_out; - } - - ingress_prog_fd = bpf_program__fd(ingress_prog); - if (ingress_prog_fd < 0) { - printf("find ingress_prog fd failed\n"); - goto err_out; - } - - rxcnt_map_fd = bpf_object__find_map_fd_by_name(obj, "rxcnt"); - if (rxcnt_map_fd < 0) { - printf("bpf_object__find_map_fd_by_name failed\n"); - goto err_out; - } - - if (attach_egress_prog) { + if (xdp_devmap_attached) { /* Update mac_map with all egress interfaces' mac addr */ - if (update_mac_map(obj) < 0) { - printf("Error: update mac map failed"); - goto err_out; + if (update_mac_map(skel->maps.mac_map) < 0) { + fprintf(stderr, "Updating mac address failed\n"); + ret = EXIT_FAIL; + goto end_destroy; } + } - /* Find egress prog fd */ - egress_prog = bpf_object__find_program_by_name(obj, "xdp_devmap_prog"); - if (!egress_prog) { - printf("finding egress_prog in obj file failed\n"); - goto err_out; - } - egress_prog_fd = bpf_program__fd(egress_prog); - if (egress_prog_fd < 0) { - printf("find egress_prog fd failed\n"); - goto err_out; - } + ret = sample_init(skel, mask); + if (ret < 0) { + fprintf(stderr, "Failed to initialize sample: %s\n", strerror(-ret)); + ret = EXIT_FAIL; + goto end_destroy; } - /* Remove attached program when program is interrupted or killed */ - signal(SIGINT, int_exit); - signal(SIGTERM, int_exit); + ingress_prog = skel->progs.xdp_redirect_map_native; + forward_map = skel->maps.forward_map_native; - /* Init forward multicast groups */ for (i = 0; ifaces[i] > 0; i++) { ifindex = ifaces[i]; + ret = EXIT_FAIL_XDP; +restart: /* bind prog_fd to each interface */ - ret = bpf_set_link_xdp_fd(ifindex, ingress_prog_fd, xdp_flags); - if (ret) { - printf("Set xdp fd failed on %d\n", ifindex); - goto err_out; + if (sample_install_xdp(ingress_prog, ifindex, generic, force) < 0) { + if (generic && !tried) { + fprintf(stderr, + "Trying fallback to sizeof(int) as value_size for devmap in generic mode\n"); + ingress_prog = skel->progs.xdp_redirect_map_general; + forward_map = skel->maps.forward_map_general; + tried = true; + goto restart; + } + goto end_destroy; } /* Add all the interfaces to forward group and attach - * egress devmap programe if exist + * egress devmap program if exist */ devmap_val.ifindex = ifindex; - devmap_val.bpf_prog.fd = egress_prog_fd; - ret = bpf_map_update_elem(forward_map_fd, &ifindex, &devmap_val, 0); - if (ret) { - perror("bpf_map_update_elem forward_map"); - goto err_out; + if (xdp_devmap_attached) + devmap_val.bpf_prog.fd = bpf_program__fd(skel->progs.xdp_devmap_prog); + ret = bpf_map_update_elem(bpf_map__fd(forward_map), &ifindex, &devmap_val, 0); + if (ret < 0) { + fprintf(stderr, "Failed to update devmap value: %s\n", + strerror(errno)); + ret = EXIT_FAIL_BPF; + goto end_destroy; } } - poll_stats(2); - - return 0; - -err_out: - return 1; + ret = sample_run(interval, NULL, NULL); + if (ret < 0) { + fprintf(stderr, "Failed during sample run: %s\n", strerror(-ret)); + ret = EXIT_FAIL; + goto end_destroy; + } + ret = EXIT_OK; +end_destroy: + xdp_redirect_map_multi__destroy(skel); +end: + sample_exit(ret); } diff --git a/samples/bpf/xdp_redirect_map_user.c b/samples/bpf/xdp_redirect_map_user.c index 0e8192688dfc..b6e4fc849577 100644 --- a/samples/bpf/xdp_redirect_map_user.c +++ b/samples/bpf/xdp_redirect_map_user.c @@ -1,6 +1,10 @@ // SPDX-License-Identifier: GPL-2.0-only /* Copyright (c) 2017 Covalent IO, Inc. http://covalent.io */ +static const char *__doc__ = +"XDP redirect tool, using BPF_MAP_TYPE_DEVMAP\n" +"Usage: xdp_redirect_map <IFINDEX|IFNAME>_IN <IFINDEX|IFNAME>_OUT\n"; + #include <linux/bpf.h> #include <linux/if_link.h> #include <assert.h> @@ -13,165 +17,83 @@ #include <net/if.h> #include <unistd.h> #include <libgen.h> -#include <sys/resource.h> -#include <sys/ioctl.h> -#include <sys/types.h> -#include <sys/socket.h> -#include <netinet/in.h> - -#include "bpf_util.h" +#include <getopt.h> #include <bpf/bpf.h> #include <bpf/libbpf.h> +#include "bpf_util.h" +#include "xdp_sample_user.h" +#include "xdp_redirect_map.skel.h" -static int ifindex_in; -static int ifindex_out; -static bool ifindex_out_xdp_dummy_attached = true; -static bool xdp_devmap_attached; -static __u32 prog_id; -static __u32 dummy_prog_id; - -static __u32 xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST; -static int rxcnt_map_fd; - -static void int_exit(int sig) -{ - __u32 curr_prog_id = 0; - - if (bpf_get_link_xdp_id(ifindex_in, &curr_prog_id, xdp_flags)) { - printf("bpf_get_link_xdp_id failed\n"); - exit(1); - } - if (prog_id == curr_prog_id) - bpf_set_link_xdp_fd(ifindex_in, -1, xdp_flags); - else if (!curr_prog_id) - printf("couldn't find a prog id on iface IN\n"); - else - printf("program on iface IN changed, not removing\n"); - - if (ifindex_out_xdp_dummy_attached) { - curr_prog_id = 0; - if (bpf_get_link_xdp_id(ifindex_out, &curr_prog_id, - xdp_flags)) { - printf("bpf_get_link_xdp_id failed\n"); - exit(1); - } - if (dummy_prog_id == curr_prog_id) - bpf_set_link_xdp_fd(ifindex_out, -1, xdp_flags); - else if (!curr_prog_id) - printf("couldn't find a prog id on iface OUT\n"); - else - printf("program on iface OUT changed, not removing\n"); - } - exit(0); -} - -static void poll_stats(int interval, int ifindex) -{ - unsigned int nr_cpus = bpf_num_possible_cpus(); - __u64 values[nr_cpus], prev[nr_cpus]; - - memset(prev, 0, sizeof(prev)); - - while (1) { - __u64 sum = 0; - __u32 key = 0; - int i; - - sleep(interval); - assert(bpf_map_lookup_elem(rxcnt_map_fd, &key, values) == 0); - for (i = 0; i < nr_cpus; i++) - sum += (values[i] - prev[i]); - if (sum) - printf("ifindex %i: %10llu pkt/s\n", - ifindex, sum / interval); - memcpy(prev, values, sizeof(values)); - } -} - -static int get_mac_addr(unsigned int ifindex_out, void *mac_addr) -{ - char ifname[IF_NAMESIZE]; - struct ifreq ifr; - int fd, ret = -1; - - fd = socket(AF_INET, SOCK_DGRAM, 0); - if (fd < 0) - return ret; - - if (!if_indextoname(ifindex_out, ifname)) - goto err_out; - - strcpy(ifr.ifr_name, ifname); - - if (ioctl(fd, SIOCGIFHWADDR, &ifr) != 0) - goto err_out; - - memcpy(mac_addr, ifr.ifr_hwaddr.sa_data, 6 * sizeof(char)); - ret = 0; +static int mask = SAMPLE_RX_CNT | SAMPLE_REDIRECT_ERR_MAP_CNT | + SAMPLE_EXCEPTION_CNT | SAMPLE_DEVMAP_XMIT_CNT_MULTI; -err_out: - close(fd); - return ret; -} +DEFINE_SAMPLE_INIT(xdp_redirect_map); -static void usage(const char *prog) -{ - fprintf(stderr, - "usage: %s [OPTS] <IFNAME|IFINDEX>_IN <IFNAME|IFINDEX>_OUT\n\n" - "OPTS:\n" - " -S use skb-mode\n" - " -N enforce native mode\n" - " -F force loading prog\n" - " -X load xdp program on egress\n", - prog); -} +static const struct option long_options[] = { + { "help", no_argument, NULL, 'h' }, + { "skb-mode", no_argument, NULL, 'S' }, + { "force", no_argument, NULL, 'F' }, + { "load-egress", no_argument, NULL, 'X' }, + { "stats", no_argument, NULL, 's' }, + { "interval", required_argument, NULL, 'i' }, + { "verbose", no_argument, NULL, 'v' }, + {} +}; int main(int argc, char **argv) { - struct bpf_prog_load_attr prog_load_attr = { - .prog_type = BPF_PROG_TYPE_UNSPEC, - }; - struct bpf_program *prog, *dummy_prog, *devmap_prog; - int prog_fd, dummy_prog_fd, devmap_prog_fd = 0; - int tx_port_map_fd, tx_mac_map_fd; - struct bpf_devmap_val devmap_val; - struct bpf_prog_info info = {}; - __u32 info_len = sizeof(info); - const char *optstr = "FSNX"; - struct bpf_object *obj; - int ret, opt, key = 0; - char filename[256]; - - while ((opt = getopt(argc, argv, optstr)) != -1) { + struct bpf_devmap_val devmap_val = {}; + bool xdp_devmap_attached = false; + struct xdp_redirect_map *skel; + char str[2 * IF_NAMESIZE + 1]; + char ifname_out[IF_NAMESIZE]; + struct bpf_map *tx_port_map; + char ifname_in[IF_NAMESIZE]; + int ifindex_in, ifindex_out; + unsigned long interval = 2; + int ret = EXIT_FAIL_OPTION; + struct bpf_program *prog; + bool generic = false; + bool force = false; + bool tried = false; + bool error = true; + int opt, key = 0; + + while ((opt = getopt_long(argc, argv, "hSFXi:vs", + long_options, NULL)) != -1) { switch (opt) { case 'S': - xdp_flags |= XDP_FLAGS_SKB_MODE; - break; - case 'N': - /* default, set below */ + generic = true; + /* devmap_xmit tracepoint not available */ + mask &= ~(SAMPLE_DEVMAP_XMIT_CNT | + SAMPLE_DEVMAP_XMIT_CNT_MULTI); break; case 'F': - xdp_flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST; + force = true; break; case 'X': xdp_devmap_attached = true; break; + case 'i': + interval = strtoul(optarg, NULL, 0); + break; + case 'v': + sample_switch_mode(); + break; + case 's': + mask |= SAMPLE_REDIRECT_MAP_CNT; + break; + case 'h': + error = false; default: - usage(basename(argv[0])); - return 1; + sample_usage(argv, long_options, __doc__, mask, error); + return ret; } } - if (!(xdp_flags & XDP_FLAGS_SKB_MODE)) { - xdp_flags |= XDP_FLAGS_DRV_MODE; - } else if (xdp_devmap_attached) { - printf("Load xdp program on egress with SKB mode not supported yet\n"); - return 1; - } - - if (optind == argc) { - printf("usage: %s <IFNAME|IFINDEX>_IN <IFNAME|IFINDEX>_OUT\n", argv[0]); - return 1; + if (argc <= optind + 1) { + sample_usage(argv, long_options, __doc__, mask, true); + goto end; } ifindex_in = if_nametoindex(argv[optind]); @@ -182,107 +104,116 @@ int main(int argc, char **argv) if (!ifindex_out) ifindex_out = strtoul(argv[optind + 1], NULL, 0); - printf("input: %d output: %d\n", ifindex_in, ifindex_out); - - snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); - prog_load_attr.file = filename; - - if (bpf_prog_load_xattr(&prog_load_attr, &obj, &prog_fd)) - return 1; - - if (xdp_flags & XDP_FLAGS_SKB_MODE) { - prog = bpf_object__find_program_by_name(obj, "xdp_redirect_map_general"); - tx_port_map_fd = bpf_object__find_map_fd_by_name(obj, "tx_port_general"); - } else { - prog = bpf_object__find_program_by_name(obj, "xdp_redirect_map_native"); - tx_port_map_fd = bpf_object__find_map_fd_by_name(obj, "tx_port_native"); - } - dummy_prog = bpf_object__find_program_by_name(obj, "xdp_redirect_dummy_prog"); - if (!prog || dummy_prog < 0 || tx_port_map_fd < 0) { - printf("finding prog/dummy_prog/tx_port_map in obj file failed\n"); - goto out; - } - prog_fd = bpf_program__fd(prog); - dummy_prog_fd = bpf_program__fd(dummy_prog); - if (prog_fd < 0 || dummy_prog_fd < 0 || tx_port_map_fd < 0) { - printf("bpf_prog_load_xattr: %s\n", strerror(errno)); - return 1; - } - - tx_mac_map_fd = bpf_object__find_map_fd_by_name(obj, "tx_mac"); - rxcnt_map_fd = bpf_object__find_map_fd_by_name(obj, "rxcnt"); - if (tx_mac_map_fd < 0 || rxcnt_map_fd < 0) { - printf("bpf_object__find_map_fd_by_name failed\n"); - return 1; + if (!ifindex_in || !ifindex_out) { + fprintf(stderr, "Bad interface index or name\n"); + sample_usage(argv, long_options, __doc__, mask, true); + goto end; } - if (bpf_set_link_xdp_fd(ifindex_in, prog_fd, xdp_flags) < 0) { - printf("ERROR: link set xdp fd failed on %d\n", ifindex_in); - return 1; + skel = xdp_redirect_map__open(); + if (!skel) { + fprintf(stderr, "Failed to xdp_redirect_map__open: %s\n", + strerror(errno)); + ret = EXIT_FAIL_BPF; + goto end; } - ret = bpf_obj_get_info_by_fd(prog_fd, &info, &info_len); - if (ret) { - printf("can't get prog info - %s\n", strerror(errno)); - return ret; + ret = sample_init_pre_load(skel); + if (ret < 0) { + fprintf(stderr, "Failed to sample_init_pre_load: %s\n", strerror(-ret)); + ret = EXIT_FAIL_BPF; + goto end_destroy; } - prog_id = info.id; - - /* Loading dummy XDP prog on out-device */ - if (bpf_set_link_xdp_fd(ifindex_out, dummy_prog_fd, - (xdp_flags | XDP_FLAGS_UPDATE_IF_NOEXIST)) < 0) { - printf("WARN: link set xdp fd failed on %d\n", ifindex_out); - ifindex_out_xdp_dummy_attached = false; - } - - memset(&info, 0, sizeof(info)); - ret = bpf_obj_get_info_by_fd(dummy_prog_fd, &info, &info_len); - if (ret) { - printf("can't get prog info - %s\n", strerror(errno)); - return ret; - } - dummy_prog_id = info.id; /* Load 2nd xdp prog on egress. */ if (xdp_devmap_attached) { - unsigned char mac_addr[6]; - - devmap_prog = bpf_object__find_program_by_name(obj, "xdp_redirect_map_egress"); - if (!devmap_prog) { - printf("finding devmap_prog in obj file failed\n"); - goto out; - } - devmap_prog_fd = bpf_program__fd(devmap_prog); - if (devmap_prog_fd < 0) { - printf("finding devmap_prog fd failed\n"); - goto out; - } - - if (get_mac_addr(ifindex_out, mac_addr) < 0) { - printf("get interface %d mac failed\n", ifindex_out); - goto out; + ret = get_mac_addr(ifindex_out, skel->rodata->tx_mac_addr); + if (ret < 0) { + fprintf(stderr, "Failed to get interface %d mac address: %s\n", + ifindex_out, strerror(-ret)); + ret = EXIT_FAIL; + goto end_destroy; } + } - ret = bpf_map_update_elem(tx_mac_map_fd, &key, mac_addr, 0); - if (ret) { - perror("bpf_update_elem tx_mac_map_fd"); - goto out; + skel->rodata->from_match[0] = ifindex_in; + skel->rodata->to_match[0] = ifindex_out; + + ret = xdp_redirect_map__load(skel); + if (ret < 0) { + fprintf(stderr, "Failed to xdp_redirect_map__load: %s\n", + strerror(errno)); + ret = EXIT_FAIL_BPF; + goto end_destroy; + } + + ret = sample_init(skel, mask); + if (ret < 0) { + fprintf(stderr, "Failed to initialize sample: %s\n", strerror(-ret)); + ret = EXIT_FAIL; + goto end_destroy; + } + + prog = skel->progs.xdp_redirect_map_native; + tx_port_map = skel->maps.tx_port_native; +restart: + if (sample_install_xdp(prog, ifindex_in, generic, force) < 0) { + /* First try with struct bpf_devmap_val as value for generic + * mode, then fallback to sizeof(int) for older kernels. + */ + fprintf(stderr, + "Trying fallback to sizeof(int) as value_size for devmap in generic mode\n"); + if (generic && !tried) { + prog = skel->progs.xdp_redirect_map_general; + tx_port_map = skel->maps.tx_port_general; + tried = true; + goto restart; } + ret = EXIT_FAIL_XDP; + goto end_destroy; } - signal(SIGINT, int_exit); - signal(SIGTERM, int_exit); + /* Loading dummy XDP prog on out-device */ + sample_install_xdp(skel->progs.xdp_redirect_dummy_prog, ifindex_out, generic, force); devmap_val.ifindex = ifindex_out; - devmap_val.bpf_prog.fd = devmap_prog_fd; - ret = bpf_map_update_elem(tx_port_map_fd, &key, &devmap_val, 0); - if (ret) { - perror("bpf_update_elem"); - goto out; - } - - poll_stats(2, ifindex_out); - -out: - return 0; + if (xdp_devmap_attached) + devmap_val.bpf_prog.fd = bpf_program__fd(skel->progs.xdp_redirect_map_egress); + ret = bpf_map_update_elem(bpf_map__fd(tx_port_map), &key, &devmap_val, 0); + if (ret < 0) { + fprintf(stderr, "Failed to update devmap value: %s\n", + strerror(errno)); + ret = EXIT_FAIL_BPF; + goto end_destroy; + } + + ret = EXIT_FAIL; + if (!if_indextoname(ifindex_in, ifname_in)) { + fprintf(stderr, "Failed to if_indextoname for %d: %s\n", ifindex_in, + strerror(errno)); + goto end_destroy; + } + + if (!if_indextoname(ifindex_out, ifname_out)) { + fprintf(stderr, "Failed to if_indextoname for %d: %s\n", ifindex_out, + strerror(errno)); + goto end_destroy; + } + + safe_strncpy(str, get_driver_name(ifindex_in), sizeof(str)); + printf("Redirecting from %s (ifindex %d; driver %s) to %s (ifindex %d; driver %s)\n", + ifname_in, ifindex_in, str, ifname_out, ifindex_out, get_driver_name(ifindex_out)); + snprintf(str, sizeof(str), "%s->%s", ifname_in, ifname_out); + + ret = sample_run(interval, NULL, NULL); + if (ret < 0) { + fprintf(stderr, "Failed during sample run: %s\n", strerror(-ret)); + ret = EXIT_FAIL; + goto end_destroy; + } + ret = EXIT_OK; +end_destroy: + xdp_redirect_map__destroy(skel); +end: + sample_exit(ret); } diff --git a/samples/bpf/xdp_redirect_user.c b/samples/bpf/xdp_redirect_user.c index 93854e135134..7af5b07a7523 100644 --- a/samples/bpf/xdp_redirect_user.c +++ b/samples/bpf/xdp_redirect_user.c @@ -1,6 +1,10 @@ // SPDX-License-Identifier: GPL-2.0-only /* Copyright (c) 2016 John Fastabend <john.r.fastabend@intel.com> */ +static const char *__doc__ = +"XDP redirect tool, using bpf_redirect helper\n" +"Usage: xdp_redirect <IFINDEX|IFNAME>_IN <IFINDEX|IFNAME>_OUT\n"; + #include <linux/bpf.h> #include <linux/if_link.h> #include <assert.h> @@ -13,126 +17,73 @@ #include <net/if.h> #include <unistd.h> #include <libgen.h> +#include <getopt.h> #include <sys/resource.h> - -#include "bpf_util.h" #include <bpf/bpf.h> #include <bpf/libbpf.h> +#include "bpf_util.h" +#include "xdp_sample_user.h" +#include "xdp_redirect.skel.h" -static int ifindex_in; -static int ifindex_out; -static bool ifindex_out_xdp_dummy_attached = true; -static __u32 prog_id; -static __u32 dummy_prog_id; - -static __u32 xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST; -static int rxcnt_map_fd; - -static void int_exit(int sig) -{ - __u32 curr_prog_id = 0; - - if (bpf_get_link_xdp_id(ifindex_in, &curr_prog_id, xdp_flags)) { - printf("bpf_get_link_xdp_id failed\n"); - exit(1); - } - if (prog_id == curr_prog_id) - bpf_set_link_xdp_fd(ifindex_in, -1, xdp_flags); - else if (!curr_prog_id) - printf("couldn't find a prog id on iface IN\n"); - else - printf("program on iface IN changed, not removing\n"); - - if (ifindex_out_xdp_dummy_attached) { - curr_prog_id = 0; - if (bpf_get_link_xdp_id(ifindex_out, &curr_prog_id, - xdp_flags)) { - printf("bpf_get_link_xdp_id failed\n"); - exit(1); - } - if (dummy_prog_id == curr_prog_id) - bpf_set_link_xdp_fd(ifindex_out, -1, xdp_flags); - else if (!curr_prog_id) - printf("couldn't find a prog id on iface OUT\n"); - else - printf("program on iface OUT changed, not removing\n"); - } - exit(0); -} - -static void poll_stats(int interval, int ifindex) -{ - unsigned int nr_cpus = bpf_num_possible_cpus(); - __u64 values[nr_cpus], prev[nr_cpus]; - - memset(prev, 0, sizeof(prev)); - - while (1) { - __u64 sum = 0; - __u32 key = 0; - int i; - - sleep(interval); - assert(bpf_map_lookup_elem(rxcnt_map_fd, &key, values) == 0); - for (i = 0; i < nr_cpus; i++) - sum += (values[i] - prev[i]); - if (sum) - printf("ifindex %i: %10llu pkt/s\n", - ifindex, sum / interval); - memcpy(prev, values, sizeof(values)); - } -} +static int mask = SAMPLE_RX_CNT | SAMPLE_REDIRECT_ERR_CNT | + SAMPLE_EXCEPTION_CNT | SAMPLE_DEVMAP_XMIT_CNT_MULTI; -static void usage(const char *prog) -{ - fprintf(stderr, - "usage: %s [OPTS] <IFNAME|IFINDEX>_IN <IFNAME|IFINDEX>_OUT\n\n" - "OPTS:\n" - " -S use skb-mode\n" - " -N enforce native mode\n" - " -F force loading prog\n", - prog); -} +DEFINE_SAMPLE_INIT(xdp_redirect); +static const struct option long_options[] = { + {"help", no_argument, NULL, 'h' }, + {"skb-mode", no_argument, NULL, 'S' }, + {"force", no_argument, NULL, 'F' }, + {"stats", no_argument, NULL, 's' }, + {"interval", required_argument, NULL, 'i' }, + {"verbose", no_argument, NULL, 'v' }, + {} +}; int main(int argc, char **argv) { - struct bpf_prog_load_attr prog_load_attr = { - .prog_type = BPF_PROG_TYPE_XDP, - }; - struct bpf_program *prog, *dummy_prog; - int prog_fd, tx_port_map_fd, opt; - struct bpf_prog_info info = {}; - __u32 info_len = sizeof(info); - const char *optstr = "FSN"; - struct bpf_object *obj; - char filename[256]; - int dummy_prog_fd; - int ret, key = 0; - - while ((opt = getopt(argc, argv, optstr)) != -1) { + int ifindex_in, ifindex_out, opt; + char str[2 * IF_NAMESIZE + 1]; + char ifname_out[IF_NAMESIZE]; + char ifname_in[IF_NAMESIZE]; + int ret = EXIT_FAIL_OPTION; + unsigned long interval = 2; + struct xdp_redirect *skel; + bool generic = false; + bool force = false; + bool error = true; + + while ((opt = getopt_long(argc, argv, "hSFi:vs", + long_options, NULL)) != -1) { switch (opt) { case 'S': - xdp_flags |= XDP_FLAGS_SKB_MODE; - break; - case 'N': - /* default, set below */ + generic = true; + mask &= ~(SAMPLE_DEVMAP_XMIT_CNT | + SAMPLE_DEVMAP_XMIT_CNT_MULTI); break; case 'F': - xdp_flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST; + force = true; + break; + case 'i': + interval = strtoul(optarg, NULL, 0); + break; + case 'v': + sample_switch_mode(); + break; + case 's': + mask |= SAMPLE_REDIRECT_CNT; break; + case 'h': + error = false; default: - usage(basename(argv[0])); - return 1; + sample_usage(argv, long_options, __doc__, mask, error); + return ret; } } - if (!(xdp_flags & XDP_FLAGS_SKB_MODE)) - xdp_flags |= XDP_FLAGS_DRV_MODE; - - if (optind + 2 != argc) { - printf("usage: %s <IFNAME|IFINDEX>_IN <IFNAME|IFINDEX>_OUT\n", argv[0]); - return 1; + if (argc <= optind + 1) { + sample_usage(argv, long_options, __doc__, mask, true); + return ret; } ifindex_in = if_nametoindex(argv[optind]); @@ -143,75 +94,80 @@ int main(int argc, char **argv) if (!ifindex_out) ifindex_out = strtoul(argv[optind + 1], NULL, 0); - printf("input: %d output: %d\n", ifindex_in, ifindex_out); - - snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); - prog_load_attr.file = filename; - - if (bpf_prog_load_xattr(&prog_load_attr, &obj, &prog_fd)) - return 1; - - prog = bpf_program__next(NULL, obj); - dummy_prog = bpf_program__next(prog, obj); - if (!prog || !dummy_prog) { - printf("finding a prog in obj file failed\n"); - return 1; + if (!ifindex_in || !ifindex_out) { + fprintf(stderr, "Bad interface index or name\n"); + sample_usage(argv, long_options, __doc__, mask, true); + goto end; } - /* bpf_prog_load_xattr gives us the pointer to first prog's fd, - * so we're missing only the fd for dummy prog - */ - dummy_prog_fd = bpf_program__fd(dummy_prog); - if (prog_fd < 0 || dummy_prog_fd < 0) { - printf("bpf_prog_load_xattr: %s\n", strerror(errno)); - return 1; + + skel = xdp_redirect__open(); + if (!skel) { + fprintf(stderr, "Failed to xdp_redirect__open: %s\n", strerror(errno)); + ret = EXIT_FAIL_BPF; + goto end; } - tx_port_map_fd = bpf_object__find_map_fd_by_name(obj, "tx_port"); - rxcnt_map_fd = bpf_object__find_map_fd_by_name(obj, "rxcnt"); - if (tx_port_map_fd < 0 || rxcnt_map_fd < 0) { - printf("bpf_object__find_map_fd_by_name failed\n"); - return 1; + ret = sample_init_pre_load(skel); + if (ret < 0) { + fprintf(stderr, "Failed to sample_init_pre_load: %s\n", strerror(-ret)); + ret = EXIT_FAIL_BPF; + goto end_destroy; } - if (bpf_set_link_xdp_fd(ifindex_in, prog_fd, xdp_flags) < 0) { - printf("ERROR: link set xdp fd failed on %d\n", ifindex_in); - return 1; + skel->rodata->from_match[0] = ifindex_in; + skel->rodata->to_match[0] = ifindex_out; + skel->rodata->ifindex_out = ifindex_out; + + ret = xdp_redirect__load(skel); + if (ret < 0) { + fprintf(stderr, "Failed to xdp_redirect__load: %s\n", strerror(errno)); + ret = EXIT_FAIL_BPF; + goto end_destroy; } - ret = bpf_obj_get_info_by_fd(prog_fd, &info, &info_len); - if (ret) { - printf("can't get prog info - %s\n", strerror(errno)); - return ret; + ret = sample_init(skel, mask); + if (ret < 0) { + fprintf(stderr, "Failed to initialize sample: %s\n", strerror(-ret)); + ret = EXIT_FAIL; + goto end_destroy; } - prog_id = info.id; + + ret = EXIT_FAIL_XDP; + if (sample_install_xdp(skel->progs.xdp_redirect_prog, ifindex_in, + generic, force) < 0) + goto end_destroy; /* Loading dummy XDP prog on out-device */ - if (bpf_set_link_xdp_fd(ifindex_out, dummy_prog_fd, - (xdp_flags | XDP_FLAGS_UPDATE_IF_NOEXIST)) < 0) { - printf("WARN: link set xdp fd failed on %d\n", ifindex_out); - ifindex_out_xdp_dummy_attached = false; + sample_install_xdp(skel->progs.xdp_redirect_dummy_prog, ifindex_out, + generic, force); + + ret = EXIT_FAIL; + if (!if_indextoname(ifindex_in, ifname_in)) { + fprintf(stderr, "Failed to if_indextoname for %d: %s\n", ifindex_in, + strerror(errno)); + goto end_destroy; } - memset(&info, 0, sizeof(info)); - ret = bpf_obj_get_info_by_fd(dummy_prog_fd, &info, &info_len); - if (ret) { - printf("can't get prog info - %s\n", strerror(errno)); - return ret; + if (!if_indextoname(ifindex_out, ifname_out)) { + fprintf(stderr, "Failed to if_indextoname for %d: %s\n", ifindex_out, + strerror(errno)); + goto end_destroy; } - dummy_prog_id = info.id; - signal(SIGINT, int_exit); - signal(SIGTERM, int_exit); + safe_strncpy(str, get_driver_name(ifindex_in), sizeof(str)); + printf("Redirecting from %s (ifindex %d; driver %s) to %s (ifindex %d; driver %s)\n", + ifname_in, ifindex_in, str, ifname_out, ifindex_out, get_driver_name(ifindex_out)); + snprintf(str, sizeof(str), "%s->%s", ifname_in, ifname_out); - /* bpf redirect port */ - ret = bpf_map_update_elem(tx_port_map_fd, &key, &ifindex_out, 0); - if (ret) { - perror("bpf_update_elem"); - goto out; + ret = sample_run(interval, NULL, NULL); + if (ret < 0) { + fprintf(stderr, "Failed during sample run: %s\n", strerror(-ret)); + ret = EXIT_FAIL; + goto end_destroy; } - - poll_stats(2, ifindex_out); - -out: - return ret; + ret = EXIT_OK; +end_destroy: + xdp_redirect__destroy(skel); +end: + sample_exit(ret); } diff --git a/samples/bpf/xdp_sample.bpf.c b/samples/bpf/xdp_sample.bpf.c new file mode 100644 index 000000000000..0eb7e1dcae22 --- /dev/null +++ b/samples/bpf/xdp_sample.bpf.c @@ -0,0 +1,266 @@ +// SPDX-License-Identifier: GPL-2.0 +/* GPLv2, Copyright(c) 2017 Jesper Dangaard Brouer, Red Hat, Inc. */ +#include "xdp_sample.bpf.h" + +#include <bpf/bpf_tracing.h> +#include <bpf/bpf_core_read.h> +#include <bpf/bpf_helpers.h> + +array_map rx_cnt SEC(".maps"); +array_map redir_err_cnt SEC(".maps"); +array_map cpumap_enqueue_cnt SEC(".maps"); +array_map cpumap_kthread_cnt SEC(".maps"); +array_map exception_cnt SEC(".maps"); +array_map devmap_xmit_cnt SEC(".maps"); + +struct { + __uint(type, BPF_MAP_TYPE_PERCPU_HASH); + __uint(max_entries, 32 * 32); + __type(key, u64); + __type(value, struct datarec); +} devmap_xmit_cnt_multi SEC(".maps"); + +const volatile int nr_cpus = 0; + +/* These can be set before loading so that redundant comparisons can be DCE'd by + * the verifier, and only actual matches are tried after loading tp_btf program. + * This allows sample to filter tracepoint stats based on net_device. + */ +const volatile int from_match[32] = {}; +const volatile int to_match[32] = {}; + +int cpumap_map_id = 0; + +/* Find if b is part of set a, but if a is empty set then evaluate to true */ +#define IN_SET(a, b) \ + ({ \ + bool __res = !(a)[0]; \ + for (int i = 0; i < ARRAY_SIZE(a) && (a)[i]; i++) { \ + __res = (a)[i] == (b); \ + if (__res) \ + break; \ + } \ + __res; \ + }) + +static __always_inline __u32 xdp_get_err_key(int err) +{ + switch (err) { + case 0: + return 0; + case -EINVAL: + return 2; + case -ENETDOWN: + return 3; + case -EMSGSIZE: + return 4; + case -EOPNOTSUPP: + return 5; + case -ENOSPC: + return 6; + default: + return 1; + } +} + +static __always_inline int xdp_redirect_collect_stat(int from, int err) +{ + u32 cpu = bpf_get_smp_processor_id(); + u32 key = XDP_REDIRECT_ERROR; + struct datarec *rec; + u32 idx; + + if (!IN_SET(from_match, from)) + return 0; + + key = xdp_get_err_key(err); + + idx = key * nr_cpus + cpu; + rec = bpf_map_lookup_elem(&redir_err_cnt, &idx); + if (!rec) + return 0; + if (key) + NO_TEAR_INC(rec->dropped); + else + NO_TEAR_INC(rec->processed); + return 0; /* Indicate event was filtered (no further processing)*/ + /* + * Returning 1 here would allow e.g. a perf-record tracepoint + * to see and record these events, but it doesn't work well + * in-practice as stopping perf-record also unload this + * bpf_prog. Plus, there is additional overhead of doing so. + */ +} + +SEC("tp_btf/xdp_redirect_err") +int BPF_PROG(tp_xdp_redirect_err, const struct net_device *dev, + const struct bpf_prog *xdp, const void *tgt, int err, + const struct bpf_map *map, u32 index) +{ + return xdp_redirect_collect_stat(dev->ifindex, err); +} + +SEC("tp_btf/xdp_redirect_map_err") +int BPF_PROG(tp_xdp_redirect_map_err, const struct net_device *dev, + const struct bpf_prog *xdp, const void *tgt, int err, + const struct bpf_map *map, u32 index) +{ + return xdp_redirect_collect_stat(dev->ifindex, err); +} + +SEC("tp_btf/xdp_redirect") +int BPF_PROG(tp_xdp_redirect, const struct net_device *dev, + const struct bpf_prog *xdp, const void *tgt, int err, + const struct bpf_map *map, u32 index) +{ + return xdp_redirect_collect_stat(dev->ifindex, err); +} + +SEC("tp_btf/xdp_redirect_map") +int BPF_PROG(tp_xdp_redirect_map, const struct net_device *dev, + const struct bpf_prog *xdp, const void *tgt, int err, + const struct bpf_map *map, u32 index) +{ + return xdp_redirect_collect_stat(dev->ifindex, err); +} + +SEC("tp_btf/xdp_cpumap_enqueue") +int BPF_PROG(tp_xdp_cpumap_enqueue, int map_id, unsigned int processed, + unsigned int drops, int to_cpu) +{ + u32 cpu = bpf_get_smp_processor_id(); + struct datarec *rec; + u32 idx; + + if (cpumap_map_id && cpumap_map_id != map_id) + return 0; + + idx = to_cpu * nr_cpus + cpu; + rec = bpf_map_lookup_elem(&cpumap_enqueue_cnt, &idx); + if (!rec) + return 0; + NO_TEAR_ADD(rec->processed, processed); + NO_TEAR_ADD(rec->dropped, drops); + /* Record bulk events, then userspace can calc average bulk size */ + if (processed > 0) + NO_TEAR_INC(rec->issue); + /* Inception: It's possible to detect overload situations, via + * this tracepoint. This can be used for creating a feedback + * loop to XDP, which can take appropriate actions to mitigate + * this overload situation. + */ + return 0; +} + +SEC("tp_btf/xdp_cpumap_kthread") +int BPF_PROG(tp_xdp_cpumap_kthread, int map_id, unsigned int processed, + unsigned int drops, int sched, struct xdp_cpumap_stats *xdp_stats) +{ + struct datarec *rec; + u32 cpu; + + if (cpumap_map_id && cpumap_map_id != map_id) + return 0; + + cpu = bpf_get_smp_processor_id(); + rec = bpf_map_lookup_elem(&cpumap_kthread_cnt, &cpu); + if (!rec) + return 0; + NO_TEAR_ADD(rec->processed, processed); + NO_TEAR_ADD(rec->dropped, drops); + NO_TEAR_ADD(rec->xdp_pass, xdp_stats->pass); + NO_TEAR_ADD(rec->xdp_drop, xdp_stats->drop); + NO_TEAR_ADD(rec->xdp_redirect, xdp_stats->redirect); + /* Count times kthread yielded CPU via schedule call */ + if (sched) + NO_TEAR_INC(rec->issue); + return 0; +} + +SEC("tp_btf/xdp_exception") +int BPF_PROG(tp_xdp_exception, const struct net_device *dev, + const struct bpf_prog *xdp, u32 act) +{ + u32 cpu = bpf_get_smp_processor_id(); + struct datarec *rec; + u32 key = act, idx; + + if (!IN_SET(from_match, dev->ifindex)) + return 0; + if (!IN_SET(to_match, dev->ifindex)) + return 0; + + if (key > XDP_REDIRECT) + key = XDP_REDIRECT + 1; + + idx = key * nr_cpus + cpu; + rec = bpf_map_lookup_elem(&exception_cnt, &idx); + if (!rec) + return 0; + NO_TEAR_INC(rec->dropped); + + return 0; +} + +SEC("tp_btf/xdp_devmap_xmit") +int BPF_PROG(tp_xdp_devmap_xmit, const struct net_device *from_dev, + const struct net_device *to_dev, int sent, int drops, int err) +{ + struct datarec *rec; + int idx_in, idx_out; + u32 cpu; + + idx_in = from_dev->ifindex; + idx_out = to_dev->ifindex; + + if (!IN_SET(from_match, idx_in)) + return 0; + if (!IN_SET(to_match, idx_out)) + return 0; + + cpu = bpf_get_smp_processor_id(); + rec = bpf_map_lookup_elem(&devmap_xmit_cnt, &cpu); + if (!rec) + return 0; + NO_TEAR_ADD(rec->processed, sent); + NO_TEAR_ADD(rec->dropped, drops); + /* Record bulk events, then userspace can calc average bulk size */ + NO_TEAR_INC(rec->info); + /* Record error cases, where no frame were sent */ + /* Catch API error of drv ndo_xdp_xmit sent more than count */ + if (err || drops < 0) + NO_TEAR_INC(rec->issue); + return 0; +} + +SEC("tp_btf/xdp_devmap_xmit") +int BPF_PROG(tp_xdp_devmap_xmit_multi, const struct net_device *from_dev, + const struct net_device *to_dev, int sent, int drops, int err) +{ + struct datarec empty = {}; + struct datarec *rec; + int idx_in, idx_out; + u64 idx; + + idx_in = from_dev->ifindex; + idx_out = to_dev->ifindex; + idx = idx_in; + idx = idx << 32 | idx_out; + + if (!IN_SET(from_match, idx_in)) + return 0; + if (!IN_SET(to_match, idx_out)) + return 0; + + bpf_map_update_elem(&devmap_xmit_cnt_multi, &idx, &empty, BPF_NOEXIST); + rec = bpf_map_lookup_elem(&devmap_xmit_cnt_multi, &idx); + if (!rec) + return 0; + + NO_TEAR_ADD(rec->processed, sent); + NO_TEAR_ADD(rec->dropped, drops); + NO_TEAR_INC(rec->info); + if (err || drops < 0) + NO_TEAR_INC(rec->issue); + return 0; +} diff --git a/samples/bpf/xdp_sample.bpf.h b/samples/bpf/xdp_sample.bpf.h new file mode 100644 index 000000000000..25b1dbe9b37b --- /dev/null +++ b/samples/bpf/xdp_sample.bpf.h @@ -0,0 +1,141 @@ +// SPDX-License-Identifier: GPL-2.0 +#ifndef _XDP_SAMPLE_BPF_H +#define _XDP_SAMPLE_BPF_H + +#include "vmlinux.h" +#include <bpf/bpf_tracing.h> +#include <bpf/bpf_core_read.h> +#include <bpf/bpf_helpers.h> + +#include "xdp_sample_shared.h" + +#define ETH_ALEN 6 +#define ETH_P_802_3_MIN 0x0600 +#define ETH_P_8021Q 0x8100 +#define ETH_P_8021AD 0x88A8 +#define ETH_P_IP 0x0800 +#define ETH_P_IPV6 0x86DD +#define ETH_P_ARP 0x0806 +#define IPPROTO_ICMPV6 58 + +#define EINVAL 22 +#define ENETDOWN 100 +#define EMSGSIZE 90 +#define EOPNOTSUPP 95 +#define ENOSPC 28 + +typedef struct { + __uint(type, BPF_MAP_TYPE_ARRAY); + __uint(map_flags, BPF_F_MMAPABLE); + __type(key, unsigned int); + __type(value, struct datarec); +} array_map; + +extern array_map rx_cnt; +extern const volatile int nr_cpus; + +enum { + XDP_REDIRECT_SUCCESS = 0, + XDP_REDIRECT_ERROR = 1 +}; + +static __always_inline void swap_src_dst_mac(void *data) +{ + unsigned short *p = data; + unsigned short dst[3]; + + dst[0] = p[0]; + dst[1] = p[1]; + dst[2] = p[2]; + p[0] = p[3]; + p[1] = p[4]; + p[2] = p[5]; + p[3] = dst[0]; + p[4] = dst[1]; + p[5] = dst[2]; +} + +#if defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && \ + __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ +#define bpf_ntohs(x) __builtin_bswap16(x) +#define bpf_htons(x) __builtin_bswap16(x) +#elif defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && \ + __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ +#define bpf_ntohs(x) (x) +#define bpf_htons(x) (x) +#else +# error "Endianness detection needs to be set up for your compiler?!" +#endif + +/* + * Note: including linux/compiler.h or linux/kernel.h for the macros below + * conflicts with vmlinux.h include in BPF files, so we define them here. + * + * Following functions are taken from kernel sources and + * break aliasing rules in their original form. + * + * While kernel is compiled with -fno-strict-aliasing, + * perf uses -Wstrict-aliasing=3 which makes build fail + * under gcc 4.4. + * + * Using extra __may_alias__ type to allow aliasing + * in this case. + */ +typedef __u8 __attribute__((__may_alias__)) __u8_alias_t; +typedef __u16 __attribute__((__may_alias__)) __u16_alias_t; +typedef __u32 __attribute__((__may_alias__)) __u32_alias_t; +typedef __u64 __attribute__((__may_alias__)) __u64_alias_t; + +static __always_inline void __read_once_size(const volatile void *p, void *res, int size) +{ + switch (size) { + case 1: *(__u8_alias_t *) res = *(volatile __u8_alias_t *) p; break; + case 2: *(__u16_alias_t *) res = *(volatile __u16_alias_t *) p; break; + case 4: *(__u32_alias_t *) res = *(volatile __u32_alias_t *) p; break; + case 8: *(__u64_alias_t *) res = *(volatile __u64_alias_t *) p; break; + default: + asm volatile ("" : : : "memory"); + __builtin_memcpy((void *)res, (const void *)p, size); + asm volatile ("" : : : "memory"); + } +} + +static __always_inline void __write_once_size(volatile void *p, void *res, int size) +{ + switch (size) { + case 1: *(volatile __u8_alias_t *) p = *(__u8_alias_t *) res; break; + case 2: *(volatile __u16_alias_t *) p = *(__u16_alias_t *) res; break; + case 4: *(volatile __u32_alias_t *) p = *(__u32_alias_t *) res; break; + case 8: *(volatile __u64_alias_t *) p = *(__u64_alias_t *) res; break; + default: + asm volatile ("" : : : "memory"); + __builtin_memcpy((void *)p, (const void *)res, size); + asm volatile ("" : : : "memory"); + } +} + +#define READ_ONCE(x) \ +({ \ + union { typeof(x) __val; char __c[1]; } __u = \ + { .__c = { 0 } }; \ + __read_once_size(&(x), __u.__c, sizeof(x)); \ + __u.__val; \ +}) + +#define WRITE_ONCE(x, val) \ +({ \ + union { typeof(x) __val; char __c[1]; } __u = \ + { .__val = (val) }; \ + __write_once_size(&(x), __u.__c, sizeof(x)); \ + __u.__val; \ +}) + +/* Add a value using relaxed read and relaxed write. Less expensive than + * fetch_add when there is no write concurrency. + */ +#define NO_TEAR_ADD(x, val) WRITE_ONCE((x), READ_ONCE(x) + (val)) +#define NO_TEAR_INC(x) NO_TEAR_ADD((x), 1) + +#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) + +#endif diff --git a/samples/bpf/xdp_sample_shared.h b/samples/bpf/xdp_sample_shared.h new file mode 100644 index 000000000000..8a7669a5d563 --- /dev/null +++ b/samples/bpf/xdp_sample_shared.h @@ -0,0 +1,17 @@ +// SPDX-License-Identifier: GPL-2.0-only +#ifndef _XDP_SAMPLE_SHARED_H +#define _XDP_SAMPLE_SHARED_H + +struct datarec { + size_t processed; + size_t dropped; + size_t issue; + union { + size_t xdp_pass; + size_t info; + }; + size_t xdp_drop; + size_t xdp_redirect; +} __attribute__((aligned(64))); + +#endif diff --git a/samples/bpf/xdp_sample_user.c b/samples/bpf/xdp_sample_user.c new file mode 100644 index 000000000000..b32d82178199 --- /dev/null +++ b/samples/bpf/xdp_sample_user.c @@ -0,0 +1,1673 @@ +// SPDX-License-Identifier: GPL-2.0-only +#define _GNU_SOURCE + +#include <arpa/inet.h> +#include <bpf/bpf.h> +#include <bpf/libbpf.h> +#include <errno.h> +#include <fcntl.h> +#include <getopt.h> +#include <linux/ethtool.h> +#include <linux/hashtable.h> +#include <linux/if_link.h> +#include <linux/jhash.h> +#include <linux/limits.h> +#include <linux/list.h> +#include <linux/sockios.h> +#include <locale.h> +#include <math.h> +#include <net/if.h> +#include <poll.h> +#include <signal.h> +#include <stdbool.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/ioctl.h> +#include <sys/mman.h> +#include <sys/resource.h> +#include <sys/signalfd.h> +#include <sys/sysinfo.h> +#include <sys/timerfd.h> +#include <sys/utsname.h> +#include <time.h> +#include <unistd.h> + +#include "bpf_util.h" +#include "xdp_sample_user.h" + +#define __sample_print(fmt, cond, ...) \ + ({ \ + if (cond) \ + printf(fmt, ##__VA_ARGS__); \ + }) + +#define print_always(fmt, ...) __sample_print(fmt, 1, ##__VA_ARGS__) +#define print_default(fmt, ...) \ + __sample_print(fmt, sample_log_level & LL_DEFAULT, ##__VA_ARGS__) +#define __print_err(err, fmt, ...) \ + ({ \ + __sample_print(fmt, err > 0 || sample_log_level & LL_DEFAULT, \ + ##__VA_ARGS__); \ + sample_err_exp = sample_err_exp ? true : err > 0; \ + }) +#define print_err(err, fmt, ...) __print_err(err, fmt, ##__VA_ARGS__) + +#define __COLUMN(x) "%'10" x " %-13s" +#define FMT_COLUMNf __COLUMN(".0f") +#define FMT_COLUMNd __COLUMN("d") +#define FMT_COLUMNl __COLUMN("llu") +#define RX(rx) rx, "rx/s" +#define PPS(pps) pps, "pkt/s" +#define DROP(drop) drop, "drop/s" +#define ERR(err) err, "error/s" +#define HITS(hits) hits, "hit/s" +#define XMIT(xmit) xmit, "xmit/s" +#define PASS(pass) pass, "pass/s" +#define REDIR(redir) redir, "redir/s" +#define NANOSEC_PER_SEC 1000000000 /* 10^9 */ + +#define XDP_UNKNOWN (XDP_REDIRECT + 1) +#define XDP_ACTION_MAX (XDP_UNKNOWN + 1) +#define XDP_REDIRECT_ERR_MAX 7 + +enum map_type { + MAP_RX, + MAP_REDIRECT_ERR, + MAP_CPUMAP_ENQUEUE, + MAP_CPUMAP_KTHREAD, + MAP_EXCEPTION, + MAP_DEVMAP_XMIT, + MAP_DEVMAP_XMIT_MULTI, + NUM_MAP, +}; + +enum log_level { + LL_DEFAULT = 1U << 0, + LL_SIMPLE = 1U << 1, + LL_DEBUG = 1U << 2, +}; + +struct record { + __u64 timestamp; + struct datarec total; + struct datarec *cpu; +}; + +struct map_entry { + struct hlist_node node; + __u64 pair; + struct record val; +}; + +struct stats_record { + struct record rx_cnt; + struct record redir_err[XDP_REDIRECT_ERR_MAX]; + struct record kthread; + struct record exception[XDP_ACTION_MAX]; + struct record devmap_xmit; + DECLARE_HASHTABLE(xmit_map, 5); + struct record enq[]; +}; + +struct sample_output { + struct { + __u64 rx; + __u64 redir; + __u64 drop; + __u64 drop_xmit; + __u64 err; + __u64 xmit; + } totals; + struct { + __u64 pps; + __u64 drop; + __u64 err; + } rx_cnt; + struct { + __u64 suc; + __u64 err; + } redir_cnt; + struct { + __u64 hits; + } except_cnt; + struct { + __u64 pps; + __u64 drop; + __u64 err; + double bavg; + } xmit_cnt; +}; + +struct xdp_desc { + int ifindex; + __u32 prog_id; + int flags; +} sample_xdp_progs[32]; + +struct datarec *sample_mmap[NUM_MAP]; +struct bpf_map *sample_map[NUM_MAP]; +size_t sample_map_count[NUM_MAP]; +enum log_level sample_log_level; +struct sample_output sample_out; +unsigned long sample_interval; +bool sample_err_exp; +int sample_xdp_cnt; +int sample_n_cpus; +int sample_sig_fd; +int sample_mask; + +static const char *xdp_redirect_err_names[XDP_REDIRECT_ERR_MAX] = { + /* Key=1 keeps unknown errors */ + "Success", + "Unknown", + "EINVAL", + "ENETDOWN", + "EMSGSIZE", + "EOPNOTSUPP", + "ENOSPC", +}; + +/* Keyed from Unknown */ +static const char *xdp_redirect_err_help[XDP_REDIRECT_ERR_MAX - 1] = { + "Unknown error", + "Invalid redirection", + "Device being redirected to is down", + "Packet length too large for device", + "Operation not supported", + "No space in ptr_ring of cpumap kthread", +}; + +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", +}; + +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); + return UINT64_MAX; + } + return (__u64)t.tv_sec * NANOSEC_PER_SEC + t.tv_nsec; +} + +static const char *action2str(int action) +{ + if (action < XDP_ACTION_MAX) + return xdp_action_names[action]; + return NULL; +} + +static void sample_print_help(int mask) +{ + printf("Output format description\n\n" + "By default, redirect success statistics are disabled, use -s to enable.\n" + "The terse output mode is default, verbose mode can be activated using -v\n" + "Use SIGQUIT (Ctrl + \\) to switch the mode dynamically at runtime\n\n" + "Terse mode displays at most the following fields:\n" + " rx/s Number of packets received per second\n" + " redir/s Number of packets successfully redirected per second\n" + " err,drop/s Aggregated count of errors per second (including dropped packets)\n" + " xmit/s Number of packets transmitted on the output device per second\n\n" + "Output description for verbose mode:\n" + " FIELD DESCRIPTION\n"); + + if (mask & SAMPLE_RX_CNT) { + printf(" receive\t\tDisplays the number of packets received & errors encountered\n" + " \t\t\tWhenever an error or packet drop occurs, details of per CPU error\n" + " \t\t\tand drop statistics will be expanded inline in terse mode.\n" + " \t\t\t\tpkt/s - Packets received per second\n" + " \t\t\t\tdrop/s - Packets dropped per second\n" + " \t\t\t\terror/s - Errors encountered per second\n\n"); + } + if (mask & (SAMPLE_REDIRECT_CNT | SAMPLE_REDIRECT_ERR_CNT)) { + printf(" redirect\t\tDisplays the number of packets successfully redirected\n" + " \t\t\tErrors encountered are expanded under redirect_err field\n" + " \t\t\tNote that passing -s to enable it has a per packet overhead\n" + " \t\t\t\tredir/s - Packets redirected successfully per second\n\n" + " redirect_err\t\tDisplays the number of packets that failed redirection\n" + " \t\t\tThe errno is expanded under this field with per CPU count\n" + " \t\t\tThe recognized errors are:\n"); + + for (int i = 2; i < XDP_REDIRECT_ERR_MAX; i++) + printf("\t\t\t %s: %s\n", xdp_redirect_err_names[i], + xdp_redirect_err_help[i - 1]); + + printf(" \n\t\t\t\terror/s - Packets that failed redirection per second\n\n"); + } + + if (mask & SAMPLE_CPUMAP_ENQUEUE_CNT) { + printf(" enqueue to cpu N\tDisplays the number of packets enqueued to bulk queue of CPU N\n" + " \t\t\tExpands to cpu:FROM->N to display enqueue stats for each CPU enqueuing to CPU N\n" + " \t\t\tReceived packets can be associated with the CPU redirect program is enqueuing \n" + " \t\t\tpackets to.\n" + " \t\t\t\tpkt/s - Packets enqueued per second from other CPU to CPU N\n" + " \t\t\t\tdrop/s - Packets dropped when trying to enqueue to CPU N\n" + " \t\t\t\tbulk-avg - Average number of packets processed for each event\n\n"); + } + + if (mask & SAMPLE_CPUMAP_KTHREAD_CNT) { + printf(" kthread\t\tDisplays the number of packets processed in CPUMAP kthread for each CPU\n" + " \t\t\tPackets consumed from ptr_ring in kthread, and its xdp_stats (after calling \n" + " \t\t\tCPUMAP bpf prog) are expanded below this. xdp_stats are expanded as a total and\n" + " \t\t\tthen per-CPU to associate it to each CPU's pinned CPUMAP kthread.\n" + " \t\t\t\tpkt/s - Packets consumed per second from ptr_ring\n" + " \t\t\t\tdrop/s - Packets dropped per second in kthread\n" + " \t\t\t\tsched - Number of times kthread called schedule()\n\n" + " \t\t\txdp_stats (also expands to per-CPU counts)\n" + " \t\t\t\tpass/s - XDP_PASS count for CPUMAP program execution\n" + " \t\t\t\tdrop/s - XDP_DROP count for CPUMAP program execution\n" + " \t\t\t\tredir/s - XDP_REDIRECT count for CPUMAP program execution\n\n"); + } + + if (mask & SAMPLE_EXCEPTION_CNT) { + printf(" xdp_exception\t\tDisplays xdp_exception tracepoint events\n" + " \t\t\tThis can occur due to internal driver errors, unrecognized\n" + " \t\t\tXDP actions and due to explicit user trigger by use of XDP_ABORTED\n" + " \t\t\tEach action is expanded below this field with its count\n" + " \t\t\t\thit/s - Number of times the tracepoint was hit per second\n\n"); + } + + if (mask & SAMPLE_DEVMAP_XMIT_CNT) { + printf(" devmap_xmit\t\tDisplays devmap_xmit tracepoint events\n" + " \t\t\tThis tracepoint is invoked for successful transmissions on output\n" + " \t\t\tdevice but these statistics are not available for generic XDP mode,\n" + " \t\t\thence they will be omitted from the output when using SKB mode\n" + " \t\t\t\txmit/s - Number of packets that were transmitted per second\n" + " \t\t\t\tdrop/s - Number of packets that failed transmissions per second\n" + " \t\t\t\tdrv_err/s - Number of internal driver errors per second\n" + " \t\t\t\tbulk-avg - Average number of packets processed for each event\n\n"); + } +} + +void sample_usage(char *argv[], const struct option *long_options, + const char *doc, int mask, bool error) +{ + int i; + + if (!error) + sample_print_help(mask); + + printf("\n%s\nOption for %s:\n", doc, argv[0]); + for (i = 0; long_options[i].name != 0; i++) { + printf(" --%-15s", long_options[i].name); + if (long_options[i].flag != NULL) + printf(" flag (internal value: %d)", + *long_options[i].flag); + else + printf("\t short-option: -%c", long_options[i].val); + printf("\n"); + } + printf("\n"); +} + +static struct datarec *alloc_record_per_cpu(void) +{ + unsigned int nr_cpus = libbpf_num_possible_cpus(); + struct datarec *array; + + array = calloc(nr_cpus, sizeof(*array)); + if (!array) { + fprintf(stderr, "Failed to allocate memory (nr_cpus: %u)\n", + nr_cpus); + return NULL; + } + return array; +} + +static int map_entry_init(struct map_entry *e, __u64 pair) +{ + e->pair = pair; + INIT_HLIST_NODE(&e->node); + e->val.timestamp = gettime(); + e->val.cpu = alloc_record_per_cpu(); + if (!e->val.cpu) + return -ENOMEM; + return 0; +} + +static void map_collect_percpu(struct datarec *values, struct record *rec) +{ + /* For percpu maps, userspace gets a value per possible CPU */ + unsigned int nr_cpus = libbpf_num_possible_cpus(); + __u64 sum_xdp_redirect = 0; + __u64 sum_processed = 0; + __u64 sum_xdp_pass = 0; + __u64 sum_xdp_drop = 0; + __u64 sum_dropped = 0; + __u64 sum_issue = 0; + int i; + + /* Get time as close as possible to reading map contents */ + rec->timestamp = gettime(); + + /* Record and sum values from each CPU */ + for (i = 0; i < nr_cpus; i++) { + rec->cpu[i].processed = READ_ONCE(values[i].processed); + rec->cpu[i].dropped = READ_ONCE(values[i].dropped); + rec->cpu[i].issue = READ_ONCE(values[i].issue); + rec->cpu[i].xdp_pass = READ_ONCE(values[i].xdp_pass); + rec->cpu[i].xdp_drop = READ_ONCE(values[i].xdp_drop); + rec->cpu[i].xdp_redirect = READ_ONCE(values[i].xdp_redirect); + + sum_processed += rec->cpu[i].processed; + sum_dropped += rec->cpu[i].dropped; + sum_issue += rec->cpu[i].issue; + sum_xdp_pass += rec->cpu[i].xdp_pass; + sum_xdp_drop += rec->cpu[i].xdp_drop; + sum_xdp_redirect += rec->cpu[i].xdp_redirect; + } + + rec->total.processed = sum_processed; + rec->total.dropped = sum_dropped; + rec->total.issue = sum_issue; + rec->total.xdp_pass = sum_xdp_pass; + rec->total.xdp_drop = sum_xdp_drop; + rec->total.xdp_redirect = sum_xdp_redirect; +} + +static int map_collect_percpu_devmap(int map_fd, struct stats_record *rec) +{ + unsigned int nr_cpus = bpf_num_possible_cpus(); + __u32 batch, count = 32; + struct datarec *values; + bool init = false; + __u64 *keys; + int i, ret; + + keys = calloc(count, sizeof(__u64)); + if (!keys) + return -ENOMEM; + values = calloc(count * nr_cpus, sizeof(struct datarec)); + if (!values) { + free(keys); + return -ENOMEM; + } + + for (;;) { + bool exit = false; + + ret = bpf_map_lookup_batch(map_fd, init ? &batch : NULL, &batch, + keys, values, &count, NULL); + if (ret < 0 && errno != ENOENT) + break; + if (errno == ENOENT) + exit = true; + + init = true; + for (i = 0; i < count; i++) { + struct map_entry *e, *x = NULL; + __u64 pair = keys[i]; + struct datarec *arr; + + arr = &values[i * nr_cpus]; + hash_for_each_possible(rec->xmit_map, e, node, pair) { + if (e->pair == pair) { + x = e; + break; + } + } + if (!x) { + x = calloc(1, sizeof(*x)); + if (!x) + goto cleanup; + if (map_entry_init(x, pair) < 0) { + free(x); + goto cleanup; + } + hash_add(rec->xmit_map, &x->node, pair); + } + map_collect_percpu(arr, &x->val); + } + + if (exit) + break; + count = 32; + } + + free(values); + free(keys); + return 0; +cleanup: + free(values); + free(keys); + return -ENOMEM; +} + +static struct stats_record *alloc_stats_record(void) +{ + struct stats_record *rec; + int i; + + rec = calloc(1, sizeof(*rec) + sample_n_cpus * sizeof(struct record)); + if (!rec) { + fprintf(stderr, "Failed to allocate memory\n"); + return NULL; + } + + if (sample_mask & SAMPLE_RX_CNT) { + rec->rx_cnt.cpu = alloc_record_per_cpu(); + if (!rec->rx_cnt.cpu) { + fprintf(stderr, + "Failed to allocate rx_cnt per-CPU array\n"); + goto end_rec; + } + } + if (sample_mask & (SAMPLE_REDIRECT_CNT | SAMPLE_REDIRECT_ERR_CNT)) { + for (i = 0; i < XDP_REDIRECT_ERR_MAX; i++) { + rec->redir_err[i].cpu = alloc_record_per_cpu(); + if (!rec->redir_err[i].cpu) { + fprintf(stderr, + "Failed to allocate redir_err per-CPU array for " + "\"%s\" case\n", + xdp_redirect_err_names[i]); + while (i--) + free(rec->redir_err[i].cpu); + goto end_rx_cnt; + } + } + } + if (sample_mask & SAMPLE_CPUMAP_KTHREAD_CNT) { + rec->kthread.cpu = alloc_record_per_cpu(); + if (!rec->kthread.cpu) { + fprintf(stderr, + "Failed to allocate kthread per-CPU array\n"); + goto end_redir; + } + } + if (sample_mask & SAMPLE_EXCEPTION_CNT) { + for (i = 0; i < XDP_ACTION_MAX; i++) { + rec->exception[i].cpu = alloc_record_per_cpu(); + if (!rec->exception[i].cpu) { + fprintf(stderr, + "Failed to allocate exception per-CPU array for " + "\"%s\" case\n", + action2str(i)); + while (i--) + free(rec->exception[i].cpu); + goto end_kthread; + } + } + } + if (sample_mask & SAMPLE_DEVMAP_XMIT_CNT) { + rec->devmap_xmit.cpu = alloc_record_per_cpu(); + if (!rec->devmap_xmit.cpu) { + fprintf(stderr, + "Failed to allocate devmap_xmit per-CPU array\n"); + goto end_exception; + } + } + if (sample_mask & SAMPLE_DEVMAP_XMIT_CNT_MULTI) + hash_init(rec->xmit_map); + if (sample_mask & SAMPLE_CPUMAP_ENQUEUE_CNT) { + for (i = 0; i < sample_n_cpus; i++) { + rec->enq[i].cpu = alloc_record_per_cpu(); + if (!rec->enq[i].cpu) { + fprintf(stderr, + "Failed to allocate enqueue per-CPU array for " + "CPU %d\n", + i); + while (i--) + free(rec->enq[i].cpu); + goto end_devmap_xmit; + } + } + } + + return rec; + +end_devmap_xmit: + free(rec->devmap_xmit.cpu); +end_exception: + for (i = 0; i < XDP_ACTION_MAX; i++) + free(rec->exception[i].cpu); +end_kthread: + free(rec->kthread.cpu); +end_redir: + for (i = 0; i < XDP_REDIRECT_ERR_MAX; i++) + free(rec->redir_err[i].cpu); +end_rx_cnt: + free(rec->rx_cnt.cpu); +end_rec: + free(rec); + return NULL; +} + +static void free_stats_record(struct stats_record *r) +{ + struct hlist_node *tmp; + struct map_entry *e; + int i; + + for (i = 0; i < sample_n_cpus; i++) + free(r->enq[i].cpu); + hash_for_each_safe(r->xmit_map, i, tmp, e, node) { + hash_del(&e->node); + free(e->val.cpu); + free(e); + } + free(r->devmap_xmit.cpu); + for (i = 0; i < XDP_ACTION_MAX; i++) + free(r->exception[i].cpu); + free(r->kthread.cpu); + for (i = 0; i < XDP_REDIRECT_ERR_MAX; i++) + free(r->redir_err[i].cpu); + free(r->rx_cnt.cpu); + free(r); +} + +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 double sample_round(double val) +{ + if (val - floor(val) < 0.5) + return floor(val); + return ceil(val); +} + +static __u64 calc_pps(struct datarec *r, struct datarec *p, double period_) +{ + __u64 packets = 0; + __u64 pps = 0; + + if (period_ > 0) { + packets = r->processed - p->processed; + pps = sample_round(packets / period_); + } + return pps; +} + +static __u64 calc_drop_pps(struct datarec *r, struct datarec *p, double period_) +{ + __u64 packets = 0; + __u64 pps = 0; + + if (period_ > 0) { + packets = r->dropped - p->dropped; + pps = sample_round(packets / period_); + } + return pps; +} + +static __u64 calc_errs_pps(struct datarec *r, struct datarec *p, double period_) +{ + __u64 packets = 0; + __u64 pps = 0; + + if (period_ > 0) { + packets = r->issue - p->issue; + pps = sample_round(packets / period_); + } + return pps; +} + +static __u64 calc_info_pps(struct datarec *r, struct datarec *p, double period_) +{ + __u64 packets = 0; + __u64 pps = 0; + + if (period_ > 0) { + packets = r->info - p->info; + pps = sample_round(packets / period_); + } + return pps; +} + +static void calc_xdp_pps(struct datarec *r, struct datarec *p, double *xdp_pass, + double *xdp_drop, double *xdp_redirect, double period_) +{ + *xdp_pass = 0, *xdp_drop = 0, *xdp_redirect = 0; + if (period_ > 0) { + *xdp_redirect = (r->xdp_redirect - p->xdp_redirect) / period_; + *xdp_pass = (r->xdp_pass - p->xdp_pass) / period_; + *xdp_drop = (r->xdp_drop - p->xdp_drop) / period_; + } +} + +static void stats_get_rx_cnt(struct stats_record *stats_rec, + struct stats_record *stats_prev, + unsigned int nr_cpus, struct sample_output *out) +{ + struct record *rec, *prev; + double t, pps, drop, err; + int i; + + rec = &stats_rec->rx_cnt; + prev = &stats_prev->rx_cnt; + t = calc_period(rec, prev); + + for (i = 0; i < nr_cpus; i++) { + struct datarec *r = &rec->cpu[i]; + struct datarec *p = &prev->cpu[i]; + char str[64]; + + pps = calc_pps(r, p, t); + drop = calc_drop_pps(r, p, t); + err = calc_errs_pps(r, p, t); + if (!pps && !drop && !err) + continue; + + snprintf(str, sizeof(str), "cpu:%d", i); + print_default(" %-18s " FMT_COLUMNf FMT_COLUMNf FMT_COLUMNf + "\n", + str, PPS(pps), DROP(drop), ERR(err)); + } + + if (out) { + pps = calc_pps(&rec->total, &prev->total, t); + drop = calc_drop_pps(&rec->total, &prev->total, t); + err = calc_errs_pps(&rec->total, &prev->total, t); + + out->rx_cnt.pps = pps; + out->rx_cnt.drop = drop; + out->rx_cnt.err = err; + out->totals.rx += pps; + out->totals.drop += drop; + out->totals.err += err; + } +} + +static void stats_get_cpumap_enqueue(struct stats_record *stats_rec, + struct stats_record *stats_prev, + unsigned int nr_cpus) +{ + struct record *rec, *prev; + double t, pps, drop, err; + int i, to_cpu; + + /* cpumap enqueue stats */ + for (to_cpu = 0; to_cpu < sample_n_cpus; to_cpu++) { + rec = &stats_rec->enq[to_cpu]; + prev = &stats_prev->enq[to_cpu]; + t = calc_period(rec, prev); + + pps = calc_pps(&rec->total, &prev->total, t); + drop = calc_drop_pps(&rec->total, &prev->total, t); + err = calc_errs_pps(&rec->total, &prev->total, t); + + if (pps > 0 || drop > 0) { + char str[64]; + + snprintf(str, sizeof(str), "enqueue to cpu %d", to_cpu); + + if (err > 0) + err = pps / err; /* calc average bulk size */ + + print_err(drop, + " %-20s " FMT_COLUMNf FMT_COLUMNf __COLUMN( + ".2f") "\n", + str, PPS(pps), DROP(drop), err, "bulk-avg"); + } + + for (i = 0; i < nr_cpus; i++) { + struct datarec *r = &rec->cpu[i]; + struct datarec *p = &prev->cpu[i]; + char str[64]; + + pps = calc_pps(r, p, t); + drop = calc_drop_pps(r, p, t); + err = calc_errs_pps(r, p, t); + if (!pps && !drop && !err) + continue; + + snprintf(str, sizeof(str), "cpu:%d->%d", i, to_cpu); + if (err > 0) + err = pps / err; /* calc average bulk size */ + print_default( + " %-18s " FMT_COLUMNf FMT_COLUMNf __COLUMN( + ".2f") "\n", + str, PPS(pps), DROP(drop), err, "bulk-avg"); + } + } +} + +static void stats_get_cpumap_remote(struct stats_record *stats_rec, + struct stats_record *stats_prev, + unsigned int nr_cpus) +{ + double xdp_pass, xdp_drop, xdp_redirect; + struct record *rec, *prev; + double t; + int i; + + rec = &stats_rec->kthread; + prev = &stats_prev->kthread; + t = calc_period(rec, prev); + + calc_xdp_pps(&rec->total, &prev->total, &xdp_pass, &xdp_drop, + &xdp_redirect, t); + if (xdp_pass || xdp_drop || xdp_redirect) { + print_err(xdp_drop, + " %-18s " FMT_COLUMNf FMT_COLUMNf FMT_COLUMNf "\n", + "xdp_stats", PASS(xdp_pass), DROP(xdp_drop), + REDIR(xdp_redirect)); + } + + for (i = 0; i < nr_cpus; i++) { + struct datarec *r = &rec->cpu[i]; + struct datarec *p = &prev->cpu[i]; + char str[64]; + + calc_xdp_pps(r, p, &xdp_pass, &xdp_drop, &xdp_redirect, t); + if (!xdp_pass && !xdp_drop && !xdp_redirect) + continue; + + snprintf(str, sizeof(str), "cpu:%d", i); + print_default(" %-16s " FMT_COLUMNf FMT_COLUMNf FMT_COLUMNf + "\n", + str, PASS(xdp_pass), DROP(xdp_drop), + REDIR(xdp_redirect)); + } +} + +static void stats_get_cpumap_kthread(struct stats_record *stats_rec, + struct stats_record *stats_prev, + unsigned int nr_cpus) +{ + struct record *rec, *prev; + double t, pps, drop, err; + int i; + + rec = &stats_rec->kthread; + prev = &stats_prev->kthread; + t = calc_period(rec, prev); + + pps = calc_pps(&rec->total, &prev->total, t); + drop = calc_drop_pps(&rec->total, &prev->total, t); + err = calc_errs_pps(&rec->total, &prev->total, t); + + print_err(drop, " %-20s " FMT_COLUMNf FMT_COLUMNf FMT_COLUMNf "\n", + pps ? "kthread total" : "kthread", PPS(pps), DROP(drop), err, + "sched"); + + for (i = 0; i < nr_cpus; i++) { + struct datarec *r = &rec->cpu[i]; + struct datarec *p = &prev->cpu[i]; + char str[64]; + + pps = calc_pps(r, p, t); + drop = calc_drop_pps(r, p, t); + err = calc_errs_pps(r, p, t); + if (!pps && !drop && !err) + continue; + + snprintf(str, sizeof(str), "cpu:%d", i); + print_default(" %-18s " FMT_COLUMNf FMT_COLUMNf FMT_COLUMNf + "\n", + str, PPS(pps), DROP(drop), err, "sched"); + } +} + +static void stats_get_redirect_cnt(struct stats_record *stats_rec, + struct stats_record *stats_prev, + unsigned int nr_cpus, + struct sample_output *out) +{ + struct record *rec, *prev; + double t, pps; + int i; + + rec = &stats_rec->redir_err[0]; + prev = &stats_prev->redir_err[0]; + t = calc_period(rec, prev); + for (i = 0; i < nr_cpus; i++) { + struct datarec *r = &rec->cpu[i]; + struct datarec *p = &prev->cpu[i]; + char str[64]; + + pps = calc_pps(r, p, t); + if (!pps) + continue; + + snprintf(str, sizeof(str), "cpu:%d", i); + print_default(" %-18s " FMT_COLUMNf "\n", str, REDIR(pps)); + } + + if (out) { + pps = calc_pps(&rec->total, &prev->total, t); + out->redir_cnt.suc = pps; + out->totals.redir += pps; + } +} + +static void stats_get_redirect_err_cnt(struct stats_record *stats_rec, + struct stats_record *stats_prev, + unsigned int nr_cpus, + struct sample_output *out) +{ + struct record *rec, *prev; + double t, drop, sum = 0; + int rec_i, i; + + for (rec_i = 1; rec_i < XDP_REDIRECT_ERR_MAX; rec_i++) { + char str[64]; + + rec = &stats_rec->redir_err[rec_i]; + prev = &stats_prev->redir_err[rec_i]; + t = calc_period(rec, prev); + + drop = calc_drop_pps(&rec->total, &prev->total, t); + if (drop > 0 && !out) { + snprintf(str, sizeof(str), + sample_log_level & LL_DEFAULT ? "%s total" : + "%s", + xdp_redirect_err_names[rec_i]); + print_err(drop, " %-18s " FMT_COLUMNf "\n", str, + ERR(drop)); + } + + for (i = 0; i < nr_cpus; i++) { + struct datarec *r = &rec->cpu[i]; + struct datarec *p = &prev->cpu[i]; + double drop; + + drop = calc_drop_pps(r, p, t); + if (!drop) + continue; + + snprintf(str, sizeof(str), "cpu:%d", i); + print_default(" %-16s" FMT_COLUMNf "\n", str, + ERR(drop)); + } + + sum += drop; + } + + if (out) { + out->redir_cnt.err = sum; + out->totals.err += sum; + } +} + +static void stats_get_exception_cnt(struct stats_record *stats_rec, + struct stats_record *stats_prev, + unsigned int nr_cpus, + struct sample_output *out) +{ + double t, drop, sum = 0; + struct record *rec, *prev; + int rec_i, i; + + for (rec_i = 0; rec_i < XDP_ACTION_MAX; rec_i++) { + rec = &stats_rec->exception[rec_i]; + prev = &stats_prev->exception[rec_i]; + t = calc_period(rec, prev); + + drop = calc_drop_pps(&rec->total, &prev->total, t); + /* Fold out errors after heading */ + sum += drop; + + if (drop > 0 && !out) { + print_always(" %-18s " FMT_COLUMNf "\n", + action2str(rec_i), ERR(drop)); + + for (i = 0; i < nr_cpus; i++) { + struct datarec *r = &rec->cpu[i]; + struct datarec *p = &prev->cpu[i]; + char str[64]; + double drop; + + drop = calc_drop_pps(r, p, t); + if (!drop) + continue; + + snprintf(str, sizeof(str), "cpu:%d", i); + print_default(" %-16s" FMT_COLUMNf "\n", + str, ERR(drop)); + } + } + } + + if (out) { + out->except_cnt.hits = sum; + out->totals.err += sum; + } +} + +static void stats_get_devmap_xmit(struct stats_record *stats_rec, + struct stats_record *stats_prev, + unsigned int nr_cpus, + struct sample_output *out) +{ + double pps, drop, info, err; + struct record *rec, *prev; + double t; + int i; + + rec = &stats_rec->devmap_xmit; + prev = &stats_prev->devmap_xmit; + t = calc_period(rec, prev); + for (i = 0; i < nr_cpus; i++) { + struct datarec *r = &rec->cpu[i]; + struct datarec *p = &prev->cpu[i]; + char str[64]; + + pps = calc_pps(r, p, t); + drop = calc_drop_pps(r, p, t); + err = calc_errs_pps(r, p, t); + + if (!pps && !drop && !err) + continue; + + snprintf(str, sizeof(str), "cpu:%d", i); + info = calc_info_pps(r, p, t); + if (info > 0) + info = (pps + drop) / info; /* calc avg bulk */ + print_default(" %-18s" FMT_COLUMNf FMT_COLUMNf FMT_COLUMNf + __COLUMN(".2f") "\n", + str, XMIT(pps), DROP(drop), err, "drv_err/s", + info, "bulk-avg"); + } + if (out) { + pps = calc_pps(&rec->total, &prev->total, t); + drop = calc_drop_pps(&rec->total, &prev->total, t); + info = calc_info_pps(&rec->total, &prev->total, t); + if (info > 0) + info = (pps + drop) / info; /* calc avg bulk */ + err = calc_errs_pps(&rec->total, &prev->total, t); + + out->xmit_cnt.pps = pps; + out->xmit_cnt.drop = drop; + out->xmit_cnt.bavg = info; + out->xmit_cnt.err = err; + out->totals.xmit += pps; + out->totals.drop_xmit += drop; + out->totals.err += err; + } +} + +static void stats_get_devmap_xmit_multi(struct stats_record *stats_rec, + struct stats_record *stats_prev, + unsigned int nr_cpus, + struct sample_output *out, + bool xmit_total) +{ + double pps, drop, info, err; + struct map_entry *entry; + struct record *r, *p; + double t; + int bkt; + + hash_for_each(stats_rec->xmit_map, bkt, entry, node) { + struct map_entry *e, *x = NULL; + char ifname_from[IFNAMSIZ]; + char ifname_to[IFNAMSIZ]; + const char *fstr, *tstr; + unsigned long prev_time; + struct record beg = {}; + __u32 from_idx, to_idx; + char str[128]; + __u64 pair; + int i; + + prev_time = sample_interval * NANOSEC_PER_SEC; + + pair = entry->pair; + from_idx = pair >> 32; + to_idx = pair & 0xFFFFFFFF; + + r = &entry->val; + beg.timestamp = r->timestamp - prev_time; + + /* Find matching entry from stats_prev map */ + hash_for_each_possible(stats_prev->xmit_map, e, node, pair) { + if (e->pair == pair) { + x = e; + break; + } + } + if (x) + p = &x->val; + else + p = &beg; + t = calc_period(r, p); + pps = calc_pps(&r->total, &p->total, t); + drop = calc_drop_pps(&r->total, &p->total, t); + info = calc_info_pps(&r->total, &p->total, t); + if (info > 0) + info = (pps + drop) / info; /* calc avg bulk */ + err = calc_errs_pps(&r->total, &p->total, t); + + if (out) { + /* We are responsible for filling out totals */ + out->totals.xmit += pps; + out->totals.drop_xmit += drop; + out->totals.err += err; + continue; + } + + fstr = tstr = NULL; + if (if_indextoname(from_idx, ifname_from)) + fstr = ifname_from; + if (if_indextoname(to_idx, ifname_to)) + tstr = ifname_to; + + snprintf(str, sizeof(str), "xmit %s->%s", fstr ?: "?", + tstr ?: "?"); + /* Skip idle streams of redirection */ + if (pps || drop || err) { + print_err(drop, + " %-20s " FMT_COLUMNf FMT_COLUMNf FMT_COLUMNf + __COLUMN(".2f") "\n", str, XMIT(pps), DROP(drop), + err, "drv_err/s", info, "bulk-avg"); + } + + for (i = 0; i < nr_cpus; i++) { + struct datarec *rc = &r->cpu[i]; + struct datarec *pc, p_beg = {}; + char str[64]; + + pc = p == &beg ? &p_beg : &p->cpu[i]; + + pps = calc_pps(rc, pc, t); + drop = calc_drop_pps(rc, pc, t); + err = calc_errs_pps(rc, pc, t); + + if (!pps && !drop && !err) + continue; + + snprintf(str, sizeof(str), "cpu:%d", i); + info = calc_info_pps(rc, pc, t); + if (info > 0) + info = (pps + drop) / info; /* calc avg bulk */ + + print_default(" %-18s" FMT_COLUMNf FMT_COLUMNf FMT_COLUMNf + __COLUMN(".2f") "\n", str, XMIT(pps), + DROP(drop), err, "drv_err/s", info, "bulk-avg"); + } + } +} + +static void stats_print(const char *prefix, int mask, struct stats_record *r, + struct stats_record *p, struct sample_output *out) +{ + int nr_cpus = libbpf_num_possible_cpus(); + const char *str; + + print_always("%-23s", prefix ?: "Summary"); + if (mask & SAMPLE_RX_CNT) + print_always(FMT_COLUMNl, RX(out->totals.rx)); + if (mask & SAMPLE_REDIRECT_CNT) + print_always(FMT_COLUMNl, REDIR(out->totals.redir)); + printf(FMT_COLUMNl, + out->totals.err + out->totals.drop + out->totals.drop_xmit, + "err,drop/s"); + if (mask & SAMPLE_DEVMAP_XMIT_CNT || + mask & SAMPLE_DEVMAP_XMIT_CNT_MULTI) + printf(FMT_COLUMNl, XMIT(out->totals.xmit)); + printf("\n"); + + if (mask & SAMPLE_RX_CNT) { + str = (sample_log_level & LL_DEFAULT) && out->rx_cnt.pps ? + "receive total" : + "receive"; + print_err((out->rx_cnt.err || out->rx_cnt.drop), + " %-20s " FMT_COLUMNl FMT_COLUMNl FMT_COLUMNl "\n", + str, PPS(out->rx_cnt.pps), DROP(out->rx_cnt.drop), + ERR(out->rx_cnt.err)); + + stats_get_rx_cnt(r, p, nr_cpus, NULL); + } + + if (mask & SAMPLE_CPUMAP_ENQUEUE_CNT) + stats_get_cpumap_enqueue(r, p, nr_cpus); + + if (mask & SAMPLE_CPUMAP_KTHREAD_CNT) { + stats_get_cpumap_kthread(r, p, nr_cpus); + stats_get_cpumap_remote(r, p, nr_cpus); + } + + if (mask & SAMPLE_REDIRECT_CNT) { + str = out->redir_cnt.suc ? "redirect total" : "redirect"; + print_default(" %-20s " FMT_COLUMNl "\n", str, + REDIR(out->redir_cnt.suc)); + + stats_get_redirect_cnt(r, p, nr_cpus, NULL); + } + + if (mask & SAMPLE_REDIRECT_ERR_CNT) { + str = (sample_log_level & LL_DEFAULT) && out->redir_cnt.err ? + "redirect_err total" : + "redirect_err"; + print_err(out->redir_cnt.err, " %-20s " FMT_COLUMNl "\n", str, + ERR(out->redir_cnt.err)); + + stats_get_redirect_err_cnt(r, p, nr_cpus, NULL); + } + + if (mask & SAMPLE_EXCEPTION_CNT) { + str = out->except_cnt.hits ? "xdp_exception total" : + "xdp_exception"; + + print_err(out->except_cnt.hits, " %-20s " FMT_COLUMNl "\n", str, + HITS(out->except_cnt.hits)); + + stats_get_exception_cnt(r, p, nr_cpus, NULL); + } + + if (mask & SAMPLE_DEVMAP_XMIT_CNT) { + str = (sample_log_level & LL_DEFAULT) && out->xmit_cnt.pps ? + "devmap_xmit total" : + "devmap_xmit"; + + print_err(out->xmit_cnt.err || out->xmit_cnt.drop, + " %-20s " FMT_COLUMNl FMT_COLUMNl FMT_COLUMNl + __COLUMN(".2f") "\n", + str, XMIT(out->xmit_cnt.pps), + DROP(out->xmit_cnt.drop), out->xmit_cnt.err, + "drv_err/s", out->xmit_cnt.bavg, "bulk-avg"); + + stats_get_devmap_xmit(r, p, nr_cpus, NULL); + } + + if (mask & SAMPLE_DEVMAP_XMIT_CNT_MULTI) + stats_get_devmap_xmit_multi(r, p, nr_cpus, NULL, + mask & SAMPLE_DEVMAP_XMIT_CNT); + + if (sample_log_level & LL_DEFAULT || + ((sample_log_level & LL_SIMPLE) && sample_err_exp)) { + sample_err_exp = false; + printf("\n"); + } +} + +int sample_setup_maps(struct bpf_map **maps) +{ + sample_n_cpus = libbpf_num_possible_cpus(); + + for (int i = 0; i < MAP_DEVMAP_XMIT_MULTI; i++) { + sample_map[i] = maps[i]; + + switch (i) { + case MAP_RX: + case MAP_CPUMAP_KTHREAD: + case MAP_DEVMAP_XMIT: + sample_map_count[i] = sample_n_cpus; + break; + case MAP_REDIRECT_ERR: + sample_map_count[i] = + XDP_REDIRECT_ERR_MAX * sample_n_cpus; + break; + case MAP_EXCEPTION: + sample_map_count[i] = XDP_ACTION_MAX * sample_n_cpus; + case MAP_CPUMAP_ENQUEUE: + sample_map_count[i] = sample_n_cpus * sample_n_cpus; + break; + default: + return -EINVAL; + } + if (bpf_map__resize(sample_map[i], sample_map_count[i]) < 0) + return -errno; + } + sample_map[MAP_DEVMAP_XMIT_MULTI] = maps[MAP_DEVMAP_XMIT_MULTI]; + return 0; +} + +static int sample_setup_maps_mappings(void) +{ + for (int i = 0; i < MAP_DEVMAP_XMIT_MULTI; i++) { + size_t size = sample_map_count[i] * sizeof(struct datarec); + + sample_mmap[i] = mmap(NULL, size, PROT_READ | PROT_WRITE, + MAP_SHARED, bpf_map__fd(sample_map[i]), 0); + if (sample_mmap[i] == MAP_FAILED) + return -errno; + } + return 0; +} + +int __sample_init(int mask) +{ + sigset_t st; + + sigemptyset(&st); + sigaddset(&st, SIGQUIT); + sigaddset(&st, SIGINT); + sigaddset(&st, SIGTERM); + + if (sigprocmask(SIG_BLOCK, &st, NULL) < 0) + return -errno; + + sample_sig_fd = signalfd(-1, &st, SFD_CLOEXEC | SFD_NONBLOCK); + if (sample_sig_fd < 0) + return -errno; + + sample_mask = mask; + + return sample_setup_maps_mappings(); +} + +static int __sample_remove_xdp(int ifindex, __u32 prog_id, int xdp_flags) +{ + __u32 cur_prog_id = 0; + int ret; + + if (prog_id) { + ret = bpf_get_link_xdp_id(ifindex, &cur_prog_id, xdp_flags); + if (ret < 0) + return -errno; + + if (prog_id != cur_prog_id) { + print_always( + "Program on ifindex %d does not match installed " + "program, skipping unload\n", + ifindex); + return -ENOENT; + } + } + + return bpf_set_link_xdp_fd(ifindex, -1, xdp_flags); +} + +int sample_install_xdp(struct bpf_program *xdp_prog, int ifindex, bool generic, + bool force) +{ + int ret, xdp_flags = 0; + __u32 prog_id = 0; + + if (sample_xdp_cnt == 32) { + fprintf(stderr, + "Total limit for installed XDP programs in a sample reached\n"); + return -ENOTSUP; + } + + xdp_flags |= !force ? XDP_FLAGS_UPDATE_IF_NOEXIST : 0; + xdp_flags |= generic ? XDP_FLAGS_SKB_MODE : XDP_FLAGS_DRV_MODE; + ret = bpf_set_link_xdp_fd(ifindex, bpf_program__fd(xdp_prog), + xdp_flags); + if (ret < 0) { + ret = -errno; + fprintf(stderr, + "Failed to install program \"%s\" on ifindex %d, mode = %s, " + "force = %s: %s\n", + bpf_program__name(xdp_prog), ifindex, + generic ? "skb" : "native", force ? "true" : "false", + strerror(-ret)); + return ret; + } + + ret = bpf_get_link_xdp_id(ifindex, &prog_id, xdp_flags); + if (ret < 0) { + ret = -errno; + fprintf(stderr, + "Failed to get XDP program id for ifindex %d, removing program: %s\n", + ifindex, strerror(errno)); + __sample_remove_xdp(ifindex, 0, xdp_flags); + return ret; + } + sample_xdp_progs[sample_xdp_cnt++] = + (struct xdp_desc){ ifindex, prog_id, xdp_flags }; + + return 0; +} + +static void sample_summary_print(void) +{ + double period = sample_out.rx_cnt.pps; + + if (sample_out.totals.rx) { + double pkts = sample_out.totals.rx; + + print_always(" Packets received : %'-10llu\n", + sample_out.totals.rx); + print_always(" Average packets/s : %'-10.0f\n", + sample_round(pkts / period)); + } + if (sample_out.totals.redir) { + double pkts = sample_out.totals.redir; + + print_always(" Packets redirected : %'-10llu\n", + sample_out.totals.redir); + print_always(" Average redir/s : %'-10.0f\n", + sample_round(pkts / period)); + } + if (sample_out.totals.drop) + print_always(" Rx dropped : %'-10llu\n", + sample_out.totals.drop); + if (sample_out.totals.drop_xmit) + print_always(" Tx dropped : %'-10llu\n", + sample_out.totals.drop_xmit); + if (sample_out.totals.err) + print_always(" Errors recorded : %'-10llu\n", + sample_out.totals.err); + if (sample_out.totals.xmit) { + double pkts = sample_out.totals.xmit; + + print_always(" Packets transmitted : %'-10llu\n", + sample_out.totals.xmit); + print_always(" Average transmit/s : %'-10.0f\n", + sample_round(pkts / period)); + } +} + +void sample_exit(int status) +{ + size_t size; + + for (int i = 0; i < NUM_MAP; i++) { + size = sample_map_count[i] * sizeof(**sample_mmap); + munmap(sample_mmap[i], size); + } + while (sample_xdp_cnt--) { + int i = sample_xdp_cnt, ifindex, xdp_flags; + __u32 prog_id; + + prog_id = sample_xdp_progs[i].prog_id; + ifindex = sample_xdp_progs[i].ifindex; + xdp_flags = sample_xdp_progs[i].flags; + + __sample_remove_xdp(ifindex, prog_id, xdp_flags); + } + sample_summary_print(); + close(sample_sig_fd); + exit(status); +} + +static int sample_stats_collect(struct stats_record *rec) +{ + int i; + + if (sample_mask & SAMPLE_RX_CNT) + map_collect_percpu(sample_mmap[MAP_RX], &rec->rx_cnt); + + if (sample_mask & SAMPLE_REDIRECT_CNT) + map_collect_percpu(sample_mmap[MAP_REDIRECT_ERR], &rec->redir_err[0]); + + if (sample_mask & SAMPLE_REDIRECT_ERR_CNT) { + for (i = 1; i < XDP_REDIRECT_ERR_MAX; i++) + map_collect_percpu(&sample_mmap[MAP_REDIRECT_ERR][i * sample_n_cpus], + &rec->redir_err[i]); + } + + if (sample_mask & SAMPLE_CPUMAP_ENQUEUE_CNT) + for (i = 0; i < sample_n_cpus; i++) + map_collect_percpu(&sample_mmap[MAP_CPUMAP_ENQUEUE][i * sample_n_cpus], + &rec->enq[i]); + + if (sample_mask & SAMPLE_CPUMAP_KTHREAD_CNT) + map_collect_percpu(sample_mmap[MAP_CPUMAP_KTHREAD], + &rec->kthread); + + if (sample_mask & SAMPLE_EXCEPTION_CNT) + for (i = 0; i < XDP_ACTION_MAX; i++) + map_collect_percpu(&sample_mmap[MAP_EXCEPTION][i * sample_n_cpus], + &rec->exception[i]); + + if (sample_mask & SAMPLE_DEVMAP_XMIT_CNT) + map_collect_percpu(sample_mmap[MAP_DEVMAP_XMIT], &rec->devmap_xmit); + + if (sample_mask & SAMPLE_DEVMAP_XMIT_CNT_MULTI) { + if (map_collect_percpu_devmap(bpf_map__fd(sample_map[MAP_DEVMAP_XMIT_MULTI]), rec) < 0) + return -EINVAL; + } + return 0; +} + +static void sample_summary_update(struct sample_output *out, int interval) +{ + sample_out.totals.rx += out->totals.rx; + sample_out.totals.redir += out->totals.redir; + sample_out.totals.drop += out->totals.drop; + sample_out.totals.drop_xmit += out->totals.drop_xmit; + sample_out.totals.err += out->totals.err; + sample_out.totals.xmit += out->totals.xmit; + sample_out.rx_cnt.pps += interval; +} + +static void sample_stats_print(int mask, struct stats_record *cur, + struct stats_record *prev, char *prog_name, + int interval) +{ + struct sample_output out = {}; + + if (mask & SAMPLE_RX_CNT) + stats_get_rx_cnt(cur, prev, 0, &out); + if (mask & SAMPLE_REDIRECT_CNT) + stats_get_redirect_cnt(cur, prev, 0, &out); + if (mask & SAMPLE_REDIRECT_ERR_CNT) + stats_get_redirect_err_cnt(cur, prev, 0, &out); + if (mask & SAMPLE_EXCEPTION_CNT) + stats_get_exception_cnt(cur, prev, 0, &out); + if (mask & SAMPLE_DEVMAP_XMIT_CNT) + stats_get_devmap_xmit(cur, prev, 0, &out); + else if (mask & SAMPLE_DEVMAP_XMIT_CNT_MULTI) + stats_get_devmap_xmit_multi(cur, prev, 0, &out, + mask & SAMPLE_DEVMAP_XMIT_CNT); + sample_summary_update(&out, interval); + + stats_print(prog_name, mask, cur, prev, &out); +} + +void sample_switch_mode(void) +{ + sample_log_level ^= LL_DEBUG - 1; +} + +static int sample_signal_cb(void) +{ + struct signalfd_siginfo si; + int r; + + r = read(sample_sig_fd, &si, sizeof(si)); + if (r < 0) + return -errno; + + switch (si.ssi_signo) { + case SIGQUIT: + sample_switch_mode(); + printf("\n"); + break; + default: + printf("\n"); + return 1; + } + + return 0; +} + +/* Pointer swap trick */ +static void swap(struct stats_record **a, struct stats_record **b) +{ + struct stats_record *tmp; + + tmp = *a; + *a = *b; + *b = tmp; +} + +static int sample_timer_cb(int timerfd, struct stats_record **rec, + struct stats_record **prev, int interval) +{ + char line[64] = "Summary"; + int ret; + __u64 t; + + ret = read(timerfd, &t, sizeof(t)); + if (ret < 0) + return -errno; + + swap(prev, rec); + ret = sample_stats_collect(*rec); + if (ret < 0) + return ret; + + if (sample_xdp_cnt == 2 && !(sample_mask & SAMPLE_SKIP_HEADING)) { + char fi[IFNAMSIZ]; + char to[IFNAMSIZ]; + const char *f, *t; + + f = t = NULL; + if (if_indextoname(sample_xdp_progs[0].ifindex, fi)) + f = fi; + if (if_indextoname(sample_xdp_progs[1].ifindex, to)) + t = to; + + snprintf(line, sizeof(line), "%s->%s", f ?: "?", t ?: "?"); + } + + sample_stats_print(sample_mask, *rec, *prev, line, interval); + return 0; +} + +int sample_run(int interval, void (*post_cb)(void *), void *ctx) +{ + struct timespec ts = { interval, 0 }; + struct itimerspec its = { ts, ts }; + struct stats_record *rec, *prev; + struct pollfd pfd[2] = {}; + int timerfd, ret; + + if (!interval) { + fprintf(stderr, "Incorrect interval 0\n"); + return -EINVAL; + } + sample_interval = interval; + /* Pretty print numbers */ + setlocale(LC_NUMERIC, "en_US.UTF-8"); + + timerfd = timerfd_create(CLOCK_MONOTONIC, TFD_CLOEXEC | TFD_NONBLOCK); + if (timerfd < 0) + return -errno; + timerfd_settime(timerfd, 0, &its, NULL); + + pfd[0].fd = sample_sig_fd; + pfd[0].events = POLLIN; + + pfd[1].fd = timerfd; + pfd[1].events = POLLIN; + + ret = -ENOMEM; + rec = alloc_stats_record(); + if (!rec) + goto end; + prev = alloc_stats_record(); + if (!prev) + goto end_rec; + + ret = sample_stats_collect(rec); + if (ret < 0) + goto end_rec_prev; + + for (;;) { + ret = poll(pfd, 2, -1); + if (ret < 0) { + if (errno == EINTR) + continue; + else + break; + } + + if (pfd[0].revents & POLLIN) + ret = sample_signal_cb(); + else if (pfd[1].revents & POLLIN) + ret = sample_timer_cb(timerfd, &rec, &prev, interval); + + if (ret) + break; + + if (post_cb) + post_cb(ctx); + } + +end_rec_prev: + free_stats_record(prev); +end_rec: + free_stats_record(rec); +end: + close(timerfd); + + return ret; +} + +const char *get_driver_name(int ifindex) +{ + struct ethtool_drvinfo drv = {}; + char ifname[IF_NAMESIZE]; + static char drvname[32]; + struct ifreq ifr = {}; + int fd, r = 0; + + fd = socket(AF_INET, SOCK_DGRAM, 0); + if (fd < 0) + return "[error]"; + + if (!if_indextoname(ifindex, ifname)) + goto end; + + drv.cmd = ETHTOOL_GDRVINFO; + safe_strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); + ifr.ifr_data = (void *)&drv; + + r = ioctl(fd, SIOCETHTOOL, &ifr); + if (r) + goto end; + + safe_strncpy(drvname, drv.driver, sizeof(drvname)); + + close(fd); + return drvname; + +end: + r = errno; + close(fd); + return r == EOPNOTSUPP ? "loopback" : "[error]"; +} + +int get_mac_addr(int ifindex, void *mac_addr) +{ + char ifname[IF_NAMESIZE]; + struct ifreq ifr = {}; + int fd, r; + + fd = socket(AF_INET, SOCK_DGRAM, 0); + if (fd < 0) + return -errno; + + if (!if_indextoname(ifindex, ifname)) { + r = -errno; + goto end; + } + + safe_strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); + + r = ioctl(fd, SIOCGIFHWADDR, &ifr); + if (r) { + r = -errno; + goto end; + } + + memcpy(mac_addr, ifr.ifr_hwaddr.sa_data, 6 * sizeof(char)); + +end: + close(fd); + return r; +} + +__attribute__((constructor)) static void sample_ctor(void) +{ + if (libbpf_set_strict_mode(LIBBPF_STRICT_ALL) < 0) { + fprintf(stderr, "Failed to set libbpf strict mode: %s\n", + strerror(errno)); + /* Just exit, nothing to cleanup right now */ + exit(EXIT_FAIL_BPF); + } +} diff --git a/samples/bpf/xdp_sample_user.h b/samples/bpf/xdp_sample_user.h new file mode 100644 index 000000000000..d97465ff8c62 --- /dev/null +++ b/samples/bpf/xdp_sample_user.h @@ -0,0 +1,108 @@ +// SPDX-License-Identifier: GPL-2.0-only +#ifndef XDP_SAMPLE_USER_H +#define XDP_SAMPLE_USER_H + +#include <bpf/libbpf.h> +#include <linux/compiler.h> + +#include "xdp_sample_shared.h" + +enum stats_mask { + _SAMPLE_REDIRECT_MAP = 1U << 0, + SAMPLE_RX_CNT = 1U << 1, + SAMPLE_REDIRECT_ERR_CNT = 1U << 2, + SAMPLE_CPUMAP_ENQUEUE_CNT = 1U << 3, + SAMPLE_CPUMAP_KTHREAD_CNT = 1U << 4, + SAMPLE_EXCEPTION_CNT = 1U << 5, + SAMPLE_DEVMAP_XMIT_CNT = 1U << 6, + SAMPLE_REDIRECT_CNT = 1U << 7, + SAMPLE_REDIRECT_MAP_CNT = SAMPLE_REDIRECT_CNT | _SAMPLE_REDIRECT_MAP, + SAMPLE_REDIRECT_ERR_MAP_CNT = SAMPLE_REDIRECT_ERR_CNT | _SAMPLE_REDIRECT_MAP, + SAMPLE_DEVMAP_XMIT_CNT_MULTI = 1U << 8, + SAMPLE_SKIP_HEADING = 1U << 9, +}; + +/* Exit return codes */ +#define EXIT_OK 0 +#define EXIT_FAIL 1 +#define EXIT_FAIL_OPTION 2 +#define EXIT_FAIL_XDP 3 +#define EXIT_FAIL_BPF 4 +#define EXIT_FAIL_MEM 5 + +int sample_setup_maps(struct bpf_map **maps); +int __sample_init(int mask); +void sample_exit(int status); +int sample_run(int interval, void (*post_cb)(void *), void *ctx); + +void sample_switch_mode(void); +int sample_install_xdp(struct bpf_program *xdp_prog, int ifindex, bool generic, + bool force); +void sample_usage(char *argv[], const struct option *long_options, + const char *doc, int mask, bool error); + +const char *get_driver_name(int ifindex); +int get_mac_addr(int ifindex, void *mac_addr); + +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wstringop-truncation" +__attribute__((unused)) +static inline char *safe_strncpy(char *dst, const char *src, size_t size) +{ + if (!size) + return dst; + strncpy(dst, src, size - 1); + dst[size - 1] = '\0'; + return dst; +} +#pragma GCC diagnostic pop + +#define __attach_tp(name) \ + ({ \ + if (!bpf_program__is_tracing(skel->progs.name)) \ + return -EINVAL; \ + skel->links.name = bpf_program__attach(skel->progs.name); \ + if (!skel->links.name) \ + return -errno; \ + }) + +#define sample_init_pre_load(skel) \ + ({ \ + skel->rodata->nr_cpus = libbpf_num_possible_cpus(); \ + sample_setup_maps((struct bpf_map *[]){ \ + skel->maps.rx_cnt, skel->maps.redir_err_cnt, \ + skel->maps.cpumap_enqueue_cnt, \ + skel->maps.cpumap_kthread_cnt, \ + skel->maps.exception_cnt, skel->maps.devmap_xmit_cnt, \ + skel->maps.devmap_xmit_cnt_multi }); \ + }) + +#define DEFINE_SAMPLE_INIT(name) \ + static int sample_init(struct name *skel, int mask) \ + { \ + int ret; \ + ret = __sample_init(mask); \ + if (ret < 0) \ + return ret; \ + if (mask & SAMPLE_REDIRECT_MAP_CNT) \ + __attach_tp(tp_xdp_redirect_map); \ + if (mask & SAMPLE_REDIRECT_CNT) \ + __attach_tp(tp_xdp_redirect); \ + if (mask & SAMPLE_REDIRECT_ERR_MAP_CNT) \ + __attach_tp(tp_xdp_redirect_map_err); \ + if (mask & SAMPLE_REDIRECT_ERR_CNT) \ + __attach_tp(tp_xdp_redirect_err); \ + if (mask & SAMPLE_CPUMAP_ENQUEUE_CNT) \ + __attach_tp(tp_xdp_cpumap_enqueue); \ + if (mask & SAMPLE_CPUMAP_KTHREAD_CNT) \ + __attach_tp(tp_xdp_cpumap_kthread); \ + if (mask & SAMPLE_EXCEPTION_CNT) \ + __attach_tp(tp_xdp_exception); \ + if (mask & SAMPLE_DEVMAP_XMIT_CNT) \ + __attach_tp(tp_xdp_devmap_xmit); \ + if (mask & SAMPLE_DEVMAP_XMIT_CNT_MULTI) \ + __attach_tp(tp_xdp_devmap_xmit_multi); \ + return 0; \ + } + +#endif diff --git a/samples/bpf/xdpsock_user.c b/samples/bpf/xdpsock_user.c index 33d0bdebbed8..49d7a6ad7e39 100644 --- a/samples/bpf/xdpsock_user.c +++ b/samples/bpf/xdpsock_user.c @@ -1,12 +1,10 @@ // SPDX-License-Identifier: GPL-2.0 /* Copyright(c) 2017 - 2018 Intel Corporation. */ -#include <asm/barrier.h> #include <errno.h> #include <getopt.h> #include <libgen.h> #include <linux/bpf.h> -#include <linux/compiler.h> #include <linux/if_link.h> #include <linux/if_xdp.h> #include <linux/if_ether.h> @@ -653,17 +651,15 @@ out: return result; } -__sum16 ip_fast_csum(const void *iph, unsigned int ihl); - /* * This is a version of ip_compute_csum() optimized for IP headers, * which always checksum on 4 octet boundaries. * This function code has been taken from * Linux kernel lib/checksum.c */ -__sum16 ip_fast_csum(const void *iph, unsigned int ihl) +static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl) { - return (__force __sum16)~do_csum(iph, ihl * 4); + return (__sum16)~do_csum(iph, ihl * 4); } /* @@ -673,11 +669,11 @@ __sum16 ip_fast_csum(const void *iph, unsigned int ihl) */ static inline __sum16 csum_fold(__wsum csum) { - u32 sum = (__force u32)csum; + u32 sum = (u32)csum; sum = (sum & 0xffff) + (sum >> 16); sum = (sum & 0xffff) + (sum >> 16); - return (__force __sum16)~sum; + return (__sum16)~sum; } /* @@ -703,16 +699,16 @@ __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr, __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr, __u32 len, __u8 proto, __wsum sum) { - unsigned long long s = (__force u32)sum; + unsigned long long s = (u32)sum; - s += (__force u32)saddr; - s += (__force u32)daddr; + s += (u32)saddr; + s += (u32)daddr; #ifdef __BIG_ENDIAN__ s += proto + len; #else s += (proto + len) << 8; #endif - return (__force __wsum)from64to32(s); + return (__wsum)from64to32(s); } /* diff --git a/samples/pktgen/functions.sh b/samples/pktgen/functions.sh index a335393157eb..933194257a24 100644 --- a/samples/pktgen/functions.sh +++ b/samples/pktgen/functions.sh @@ -123,7 +123,7 @@ function root_check_run_with_sudo() { if [ "$EUID" -ne 0 ]; then if [ -x $0 ]; then # Directly executable use sudo info "Not root, running with sudo" - sudo "$0" "$@" + sudo -E "$0" "$@" exit $? fi err 4 "cannot perform sudo run of $0" diff --git a/samples/pktgen/pktgen_bench_xmit_mode_netif_receive.sh b/samples/pktgen/pktgen_bench_xmit_mode_netif_receive.sh index 30a610b541ad..99ec0688b044 100755 --- a/samples/pktgen/pktgen_bench_xmit_mode_netif_receive.sh +++ b/samples/pktgen/pktgen_bench_xmit_mode_netif_receive.sh @@ -89,14 +89,21 @@ for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do pg_set $dev "burst $BURST" done +# Run if user hits control-c +function print_result() { + # Print results + for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do + dev=${DEV}@${thread} + echo "Device: $dev" + cat /proc/net/pktgen/$dev | grep -A2 "Result:" + done +} +# trap keyboard interrupt (Ctrl-C) +trap true SIGINT + # start_run echo "Running... ctrl^C to stop" >&2 pg_ctrl "start" echo "Done" >&2 -# Print results -for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do - dev=${DEV}@${thread} - echo "Device: $dev" - cat /proc/net/pktgen/$dev | grep -A2 "Result:" -done +print_result diff --git a/samples/pktgen/pktgen_bench_xmit_mode_queue_xmit.sh b/samples/pktgen/pktgen_bench_xmit_mode_queue_xmit.sh index a6195bd77532..04b0dd0c36d6 100755 --- a/samples/pktgen/pktgen_bench_xmit_mode_queue_xmit.sh +++ b/samples/pktgen/pktgen_bench_xmit_mode_queue_xmit.sh @@ -69,14 +69,21 @@ for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do pg_set $dev "xmit_mode queue_xmit" done +# Run if user hits control-c +function print_result { + # Print results + for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do + dev=${DEV}@${thread} + echo "Device: $dev" + cat /proc/net/pktgen/$dev | grep -A2 "Result:" + done +} +# trap keyboard interrupt (Ctrl-C) +trap true SIGINT + # start_run echo "Running... ctrl^C to stop" >&2 pg_ctrl "start" echo "Done" >&2 -# Print results -for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do - dev=${DEV}@${thread} - echo "Device: $dev" - cat /proc/net/pktgen/$dev | grep -A2 "Result:" -done +print_result diff --git a/samples/pktgen/pktgen_sample01_simple.sh b/samples/pktgen/pktgen_sample01_simple.sh index 246cfe02bb82..09a92ea963f9 100755 --- a/samples/pktgen/pktgen_sample01_simple.sh +++ b/samples/pktgen/pktgen_sample01_simple.sh @@ -79,15 +79,22 @@ pg_set $DEV "flag UDPSRC_RND" pg_set $DEV "udp_src_min $UDP_SRC_MIN" pg_set $DEV "udp_src_max $UDP_SRC_MAX" +# Run if user hits control-c +function print_result() { + # Print results + echo "Result device: $DEV" + cat /proc/net/pktgen/$DEV +} +# trap keyboard interrupt (Ctrl-C) +trap true SIGINT + if [ -z "$APPEND" ]; then # start_run echo "Running... ctrl^C to stop" >&2 pg_ctrl "start" echo "Done" >&2 - # Print results - echo "Result device: $DEV" - cat /proc/net/pktgen/$DEV + print_result else echo "Append mode: config done. Do more or use 'pg_ctrl start' to run" fi \ No newline at end of file diff --git a/samples/pktgen/pktgen_sample02_multiqueue.sh b/samples/pktgen/pktgen_sample02_multiqueue.sh index c6af3d9d5171..7fa41c84c32f 100755 --- a/samples/pktgen/pktgen_sample02_multiqueue.sh +++ b/samples/pktgen/pktgen_sample02_multiqueue.sh @@ -83,18 +83,25 @@ for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do pg_set $dev "udp_src_max $UDP_SRC_MAX" done -if [ -z "$APPEND" ]; then - # start_run - echo "Running... ctrl^C to stop" >&2 - pg_ctrl "start" - echo "Done" >&2 - +# Run if user hits control-c +function print_result() { # Print results for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do dev=${DEV}@${thread} echo "Device: $dev" cat /proc/net/pktgen/$dev | grep -A2 "Result:" done +} +# trap keyboard interrupt (Ctrl-C) +trap true SIGINT + +if [ -z "$APPEND" ]; then + # start_run + echo "Running... ctrl^C to stop" >&2 + pg_ctrl "start" + echo "Done" >&2 + + print_result else echo "Append mode: config done. Do more or use 'pg_ctrl start' to run" fi diff --git a/samples/pktgen/pktgen_sample03_burst_single_flow.sh b/samples/pktgen/pktgen_sample03_burst_single_flow.sh index ab87de440277..8bf2fdffba16 100755 --- a/samples/pktgen/pktgen_sample03_burst_single_flow.sh +++ b/samples/pktgen/pktgen_sample03_burst_single_flow.sh @@ -85,7 +85,7 @@ for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do done # Run if user hits control-c -function control_c() { +function print_result() { # Print results for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do dev=${DEV}@${thread} @@ -94,11 +94,13 @@ function control_c() { done } # trap keyboard interrupt (Ctrl-C) -trap control_c SIGINT +trap true SIGINT if [ -z "$APPEND" ]; then echo "Running... ctrl^C to stop" >&2 pg_ctrl "start" + + print_result else echo "Append mode: config done. Do more or use 'pg_ctrl start' to run" fi diff --git a/samples/pktgen/pktgen_sample04_many_flows.sh b/samples/pktgen/pktgen_sample04_many_flows.sh index 56c5f5af350f..cff51f861506 100755 --- a/samples/pktgen/pktgen_sample04_many_flows.sh +++ b/samples/pktgen/pktgen_sample04_many_flows.sh @@ -13,13 +13,15 @@ root_check_run_with_sudo "$@" # Parameter parsing via include source ${basedir}/parameters.sh # Set some default params, if they didn't get set -[ -z "$DEST_IP" ] && DEST_IP="198.18.0.42" +if [ -z "$DEST_IP" ]; then + [ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1" +fi [ -z "$DST_MAC" ] && DST_MAC="90:e2:ba:ff:ff:ff" [ -z "$CLONE_SKB" ] && CLONE_SKB="0" [ -z "$COUNT" ] && COUNT="0" # Zero means indefinitely if [ -n "$DEST_IP" ]; then - validate_addr $DEST_IP - read -r DST_MIN DST_MAX <<< $(parse_addr $DEST_IP) + validate_addr${IP6} $DEST_IP + read -r DST_MIN DST_MAX <<< $(parse_addr${IP6} $DEST_IP) fi if [ -n "$DST_PORT" ]; then read -r UDP_DST_MIN UDP_DST_MAX <<< $(parse_ports $DST_PORT) @@ -62,8 +64,8 @@ for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do # Single destination pg_set $dev "dst_mac $DST_MAC" - pg_set $dev "dst_min $DST_MIN" - pg_set $dev "dst_max $DST_MAX" + pg_set $dev "dst${IP6}_min $DST_MIN" + pg_set $dev "dst${IP6}_max $DST_MAX" if [ -n "$DST_PORT" ]; then # Single destination port or random port range diff --git a/samples/pktgen/pktgen_sample05_flow_per_thread.sh b/samples/pktgen/pktgen_sample05_flow_per_thread.sh index 6e0effabca59..3578d0aa4ac5 100755 --- a/samples/pktgen/pktgen_sample05_flow_per_thread.sh +++ b/samples/pktgen/pktgen_sample05_flow_per_thread.sh @@ -17,14 +17,16 @@ root_check_run_with_sudo "$@" # Parameter parsing via include source ${basedir}/parameters.sh # Set some default params, if they didn't get set -[ -z "$DEST_IP" ] && DEST_IP="198.18.0.42" +if [ -z "$DEST_IP" ]; then + [ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1" +fi [ -z "$DST_MAC" ] && DST_MAC="90:e2:ba:ff:ff:ff" [ -z "$CLONE_SKB" ] && CLONE_SKB="0" [ -z "$BURST" ] && BURST=32 [ -z "$COUNT" ] && COUNT="0" # Zero means indefinitely if [ -n "$DEST_IP" ]; then - validate_addr $DEST_IP - read -r DST_MIN DST_MAX <<< $(parse_addr $DEST_IP) + validate_addr${IP6} $DEST_IP + read -r DST_MIN DST_MAX <<< $(parse_addr${IP6} $DEST_IP) fi if [ -n "$DST_PORT" ]; then read -r UDP_DST_MIN UDP_DST_MAX <<< $(parse_ports $DST_PORT) @@ -52,8 +54,8 @@ for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do # Single destination pg_set $dev "dst_mac $DST_MAC" - pg_set $dev "dst_min $DST_MIN" - pg_set $dev "dst_max $DST_MAX" + pg_set $dev "dst${IP6}_min $DST_MIN" + pg_set $dev "dst${IP6}_max $DST_MAX" if [ -n "$DST_PORT" ]; then # Single destination port or random port range diff --git a/samples/pktgen/pktgen_sample06_numa_awared_queue_irq_affinity.sh b/samples/pktgen/pktgen_sample06_numa_awared_queue_irq_affinity.sh index 7c27923083a6..264cc5db9c49 100755 --- a/samples/pktgen/pktgen_sample06_numa_awared_queue_irq_affinity.sh +++ b/samples/pktgen/pktgen_sample06_numa_awared_queue_irq_affinity.sh @@ -100,12 +100,8 @@ for ((i = 0; i < $THREADS; i++)); do pg_set $dev "udp_src_max $UDP_SRC_MAX" done -# start_run -if [ -z "$APPEND" ]; then - echo "Running... ctrl^C to stop" >&2 - pg_ctrl "start" - echo "Done" >&2 - +# Run if user hits control-c +function print_result() { # Print results for ((i = 0; i < $THREADS; i++)); do thread=${cpu_array[$((i+F_THREAD))]} @@ -113,6 +109,17 @@ if [ -z "$APPEND" ]; then echo "Device: $dev" cat /proc/net/pktgen/$dev | grep -A2 "Result:" done +} +# trap keyboard interrupt (Ctrl-C) +trap true SIGINT + +# start_run +if [ -z "$APPEND" ]; then + echo "Running... ctrl^C to stop" >&2 + pg_ctrl "start" + echo "Done" >&2 + + print_result else echo "Append mode: config done. Do more or use 'pg_ctrl start' to run" fi |