From patchwork Thu Mar 6 09:56:35 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Akihiko Odaki X-Patchwork-Id: 14004105 Received: from mail-pl1-f171.google.com (mail-pl1-f171.google.com [209.85.214.171]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 73DB220B1E5 for ; Thu, 6 Mar 2025 09:57:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.171 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741255053; cv=none; b=BCyqvq8kYA+DOocKdaTsRVuWwuXVwTSs+jci5jaDihmzQVAAAwioNrBcwLt4nV683gM2ZHorpt8VAPFHdwkf+kPbApbht7pG3b1x25qkO+GFuYF7llQlvo8v23xLWpQhjZeiWQClH88G/I+38LYHKZbblU7l2N/ntlnGf+WqCr0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741255053; c=relaxed/simple; bh=zmFVzver9kf4I8nu4iYc6c6/eOEuAQ30n1rNi4IX95s=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To; b=Kt2xXOOPrJl98ipnRshCVZ0LLpT0dGX/sKXHpiye0wNH+EsoKThUqX4QTG83Fdg44tkdQx6wKtTzdf2CVk9ScKRdWJ7+ny+HMcQrth7wK/OPMYG9C7/v/HLBZKrua76EeiEXFRZwdGPtdM8+xydgbPs58r70h5fB0O6MYofY3XE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=daynix.com; spf=pass smtp.mailfrom=daynix.com; dkim=pass (2048-bit key) header.d=daynix-com.20230601.gappssmtp.com header.i=@daynix-com.20230601.gappssmtp.com header.b=NjzUZos4; arc=none smtp.client-ip=209.85.214.171 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=daynix.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=daynix.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=daynix-com.20230601.gappssmtp.com header.i=@daynix-com.20230601.gappssmtp.com header.b="NjzUZos4" Received: by mail-pl1-f171.google.com with SMTP id d9443c01a7336-22403cbb47fso7032135ad.0 for ; Thu, 06 Mar 2025 01:57:31 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=daynix-com.20230601.gappssmtp.com; s=20230601; t=1741255051; x=1741859851; darn=vger.kernel.org; h=to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=7HLNLtip7z6AfdeftYfqeV53n28FrmHisyRZVCVIPJQ=; b=NjzUZos4vABTA2Gfp3BaLaI3j6T0RJWT7MFOp3dG+O3XFaPFVvw9si+hbvqTuCYjRL bcsDhQTFhWFIN6DA17cj1X2NePPQqpdGuoMbnjLWLngrbfKpsn2F7V4muzUeuIZFrZ5I UOIqTa8lp7LbpVlHgss5d/8mLwK+CbBNP7SgexkTxpy9uaBpqYgRDKcn7YGhL9FrYgV5 jHPe4cF3ByjhOgTbYKHKYBQS7fbpxWzZ6lcltZDbZkIWYWGGz7MbsIn8byfmfIL03/AS SZi+RkSKyOZci1KpJStLVj2AgB9Hu7QfUOQK5izbgMIOvegpe/icTnUKh7fNwZ3G6S2l t3NQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1741255051; x=1741859851; h=to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=7HLNLtip7z6AfdeftYfqeV53n28FrmHisyRZVCVIPJQ=; b=GSsgLvTOqD0j1mNxvXEVbmgJBLb2syib37BjFyPHnIRouQZWDfW1o1ggVCNFimCUka F/mkoXbTnmqsPUiTE390yDYvs9g00/4YgmpdBKmhjz+Er3WuWFaQxban/O0f//nina1O 6sO8RP0pn1gJszuMSF2WYIRM9do9KeXvR8uIN/Cu2EbbFQ98PcUsXjIxBTF3lqTqXd7d qR6+Vuo0UGLMhFU2uumYfa38fRUXeZ/R2C2H4spbCPSwI1n1Hi7hQL62CZuukqHXk6lY ILIdjQBj6usc+bmu6yNssYqwpJSd3OzKP9MTwqDsCG9YweLXwPDRZF8vC2Q5JYvwjijz BIPg== X-Forwarded-Encrypted: i=1; AJvYcCWQINIg5RS41HTYs73GQQOX4A/s5rQEAjNvWktvpQuaeaI2E/nNQbhNcbVuc7KLhcKHfoY=@vger.kernel.org X-Gm-Message-State: AOJu0YymmkPbnM4u4J2tSooF3aX4U/0FuDeqj1bZz4K5VuduPAxCe/pq 6y59lqEZfpzmHqV+k3+ZCzcM2phWBbtRmxqPddrsh3UpslHPM0jEZy4ub2ZVmTE= X-Gm-Gg: ASbGncu90sjFsUVjsSTz4HgUsAKjZFkGXHDZ/Oh2TPy4hH04obnmhp/sg+nOUUOXJ+h YHPCg5XNVZ5hWuxPazYCBMTQCUlUNTwal7cFr+0pECu+fy595x8k1a99Zs9Z7lr3XqgXlQgkuV/ RGlmqL6lIWDDsdK4bPXnetk1SphpO8fQoMfceYB/KnciXEv6OpkTqMYEuLCEA5m31/oAl6DSClz jjsVxmS791UNSaK3N7rO3vUDMFMdg2GqGFq5lw/2c3rLDOHgcMspwcztF2ExGPzvZF1dOK7qrdc AA873YYgfm9TfoQeo7vKed9FCuZyleHyZx+I2ZJJZ+175C0x X-Google-Smtp-Source: AGHT+IGtPKOatxjbdRuu5ijpcnPDZUbbR29+sGCzJO/3CnoM37EjcrWeXH/XJwI+5M64Cj3NfNihvw== X-Received: by 2002:a05:6a21:3986:b0:1ee:8a68:f83e with SMTP id adf61e73a8af0-1f3494b4c84mr12241868637.20.1741255050746; Thu, 06 Mar 2025 01:57:30 -0800 (PST) Received: from localhost ([157.82.207.107]) by smtp.gmail.com with UTF8SMTPSA id 41be03b00d2f7-af281075ecfsm841172a12.5.2025.03.06.01.57.25 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 06 Mar 2025 01:57:30 -0800 (PST) From: Akihiko Odaki Date: Thu, 06 Mar 2025 18:56:35 +0900 Subject: [PATCH net-next v8 5/6] selftest: tun: Add tests for virtio-net hashing Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250306-rss-v8-5-7ab4f56ff423@daynix.com> References: <20250306-rss-v8-0-7ab4f56ff423@daynix.com> In-Reply-To: <20250306-rss-v8-0-7ab4f56ff423@daynix.com> To: Jonathan Corbet , Willem de Bruijn , Jason Wang , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , "Michael S. Tsirkin" , Xuan Zhuo , Shuah Khan , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-kselftest@vger.kernel.org, Yuri Benditovich , Andrew Melnychenko , Stephen Hemminger , gur.stavi@huawei.com, Lei Yang , Simon Horman , Akihiko Odaki X-Mailer: b4 0.14.2 The added tests confirm tun can perform RSS and hash reporting, and reject invalid configurations for them. Signed-off-by: Akihiko Odaki --- tools/testing/selftests/net/Makefile | 2 +- tools/testing/selftests/net/tun.c | 584 ++++++++++++++++++++++++++++++++++- 2 files changed, 576 insertions(+), 10 deletions(-) diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile index 73ee88d6b043004be23b444de667a1d99a6045de..9772f691a9a011d99212df32463cdb930cf0a1a0 100644 --- a/tools/testing/selftests/net/Makefile +++ b/tools/testing/selftests/net/Makefile @@ -123,6 +123,6 @@ $(OUTPUT)/reuseport_bpf_numa: LDLIBS += -lnuma $(OUTPUT)/tcp_mmap: LDLIBS += -lpthread -lcrypto $(OUTPUT)/tcp_inq: LDLIBS += -lpthread $(OUTPUT)/bind_bhash: LDLIBS += -lpthread -$(OUTPUT)/io_uring_zerocopy_tx: CFLAGS += -I../../../include/ +$(OUTPUT)/io_uring_zerocopy_tx $(OUTPUT)/tun: CFLAGS += -I../../../include/ include bpf.mk diff --git a/tools/testing/selftests/net/tun.c b/tools/testing/selftests/net/tun.c index 463dd98f2b80b1bdcb398cee43c834e7dc5cf784..acadeea7194eaea9416a605b47f99f7a5f1f80cd 100644 --- a/tools/testing/selftests/net/tun.c +++ b/tools/testing/selftests/net/tun.c @@ -2,21 +2,38 @@ #define _GNU_SOURCE +#include #include #include +#include +#include #include #include #include #include -#include +#include +#include +#include +#include +#include +#include +#include #include +#include #include #include -#include -#include +#include +#include +#include +#include #include "../kselftest_harness.h" +#define TUN_HWADDR_SOURCE { 0x02, 0x00, 0x00, 0x00, 0x00, 0x00 } +#define TUN_HWADDR_DEST { 0x02, 0x00, 0x00, 0x00, 0x00, 0x01 } +#define TUN_IPADDR_SOURCE htonl((172 << 24) | (17 << 16) | 0) +#define TUN_IPADDR_DEST htonl((172 << 24) | (17 << 16) | 1) + static int tun_attach(int fd, char *dev) { struct ifreq ifr; @@ -39,7 +56,7 @@ static int tun_detach(int fd, char *dev) return ioctl(fd, TUNSETQUEUE, (void *) &ifr); } -static int tun_alloc(char *dev) +static int tun_alloc(char *dev, short flags) { struct ifreq ifr; int fd, err; @@ -52,7 +69,8 @@ static int tun_alloc(char *dev) memset(&ifr, 0, sizeof(ifr)); strcpy(ifr.ifr_name, dev); - ifr.ifr_flags = IFF_TAP | IFF_NAPI | IFF_MULTI_QUEUE; + ifr.ifr_flags = flags | IFF_TAP | IFF_NAPI | IFF_NO_PI | + IFF_MULTI_QUEUE; err = ioctl(fd, TUNSETIFF, (void *) &ifr); if (err < 0) { @@ -64,6 +82,40 @@ static int tun_alloc(char *dev) return fd; } +static bool tun_add_to_bridge(int local_fd, const char *name) +{ + struct ifreq ifreq = { + .ifr_name = "xbridge", + .ifr_ifindex = if_nametoindex(name) + }; + + if (!ifreq.ifr_ifindex) { + perror("if_nametoindex"); + return false; + } + + if (ioctl(local_fd, SIOCBRADDIF, &ifreq)) { + perror("SIOCBRADDIF"); + return false; + } + + return true; +} + +static bool tun_set_flags(int local_fd, const char *name, short flags) +{ + struct ifreq ifreq = { .ifr_flags = flags }; + + strcpy(ifreq.ifr_name, name); + + if (ioctl(local_fd, SIOCSIFFLAGS, &ifreq)) { + perror("SIOCSIFFLAGS"); + return false; + } + + return true; +} + static int tun_delete(char *dev) { struct { @@ -102,6 +154,156 @@ static int tun_delete(char *dev) return ret; } +static uint32_t tun_sum(const void *buf, size_t len) +{ + const uint16_t *sbuf = buf; + uint32_t sum = 0; + + while (len > 1) { + sum += *sbuf++; + len -= 2; + } + + if (len) + sum += *(uint8_t *)sbuf; + + return sum; +} + +static uint16_t tun_build_ip_check(uint32_t sum) +{ + return ~((sum & 0xffff) + (sum >> 16)); +} + +static uint32_t tun_build_ip_pseudo_sum(const void *iphdr) +{ + uint16_t tot_len = ntohs(((struct iphdr *)iphdr)->tot_len); + + return tun_sum((char *)iphdr + offsetof(struct iphdr, saddr), 8) + + htons(((struct iphdr *)iphdr)->protocol) + + htons(tot_len - sizeof(struct iphdr)); +} + +static uint32_t tun_build_ipv6_pseudo_sum(const void *ipv6hdr) +{ + return tun_sum((char *)ipv6hdr + offsetof(struct ipv6hdr, saddr), 32) + + ((struct ipv6hdr *)ipv6hdr)->payload_len + + htons(((struct ipv6hdr *)ipv6hdr)->nexthdr); +} + +static void tun_build_ethhdr(struct ethhdr *ethhdr, uint16_t proto) +{ + *ethhdr = (struct ethhdr) { + .h_dest = TUN_HWADDR_DEST, + .h_source = TUN_HWADDR_SOURCE, + .h_proto = htons(proto) + }; +} + +static void tun_build_iphdr(void *dest, uint16_t len, uint8_t protocol) +{ + struct iphdr iphdr = { + .ihl = sizeof(iphdr) / 4, + .version = 4, + .tot_len = htons(sizeof(iphdr) + len), + .ttl = 255, + .protocol = protocol, + .saddr = TUN_IPADDR_SOURCE, + .daddr = TUN_IPADDR_DEST + }; + + iphdr.check = tun_build_ip_check(tun_sum(&iphdr, sizeof(iphdr))); + memcpy(dest, &iphdr, sizeof(iphdr)); +} + +static void tun_build_ipv6hdr(void *dest, uint16_t len, uint8_t protocol) +{ + struct ipv6hdr ipv6hdr = { + .version = 6, + .payload_len = htons(len), + .nexthdr = protocol, + .saddr = { + .s6_addr32 = { + htonl(0xffff0000), 0, 0, TUN_IPADDR_SOURCE + } + }, + .daddr = { + .s6_addr32 = { + htonl(0xffff0000), 0, 0, TUN_IPADDR_DEST + } + }, + }; + + memcpy(dest, &ipv6hdr, sizeof(ipv6hdr)); +} + +static void tun_build_tcphdr(void *dest, uint32_t sum) +{ + struct tcphdr tcphdr = { + .source = htons(9), + .dest = htons(9), + .fin = 1, + .doff = sizeof(tcphdr) / 4, + }; + uint32_t tcp_sum = tun_sum(&tcphdr, sizeof(tcphdr)); + + tcphdr.check = tun_build_ip_check(sum + tcp_sum); + memcpy(dest, &tcphdr, sizeof(tcphdr)); +} + +static void tun_build_udphdr(void *dest, uint32_t sum) +{ + struct udphdr udphdr = { + .source = htons(9), + .dest = htons(9), + .len = htons(sizeof(udphdr)), + }; + uint32_t udp_sum = tun_sum(&udphdr, sizeof(udphdr)); + + udphdr.check = tun_build_ip_check(sum + udp_sum); + memcpy(dest, &udphdr, sizeof(udphdr)); +} + +static bool tun_vnet_hash_check(int source_fd, const int *dest_fds, + const void *buffer, size_t len, + uint8_t flags, + uint16_t hash_report, uint32_t hash_value) +{ + size_t read_len = sizeof(struct virtio_net_hdr_v1_hash) + len; + struct virtio_net_hdr_v1_hash *read_buffer; + struct virtio_net_hdr_v1_hash hdr = { + .hdr = { .flags = flags }, + .hash_value = htole32(hash_value), + .hash_report = htole16(hash_report) + }; + int ret; + int txq = hash_report ? hash_value & 1 : 2; + + if (write(source_fd, buffer, len) != len) { + perror("write"); + return false; + } + + read_buffer = malloc(read_len); + if (!read_buffer) { + perror("malloc"); + return false; + } + + ret = read(dest_fds[txq], read_buffer, read_len); + if (ret != read_len) { + perror("read"); + free(read_buffer); + return false; + } + + ret = !memcmp(read_buffer, &hdr, sizeof(*read_buffer)) && + !memcmp(read_buffer + 1, buffer, len); + + free(read_buffer); + return ret; +} + FIXTURE(tun) { char ifname[IFNAMSIZ]; @@ -112,10 +314,10 @@ FIXTURE_SETUP(tun) { memset(self->ifname, 0, sizeof(self->ifname)); - self->fd = tun_alloc(self->ifname); + self->fd = tun_alloc(self->ifname, 0); ASSERT_GE(self->fd, 0); - self->fd2 = tun_alloc(self->ifname); + self->fd2 = tun_alloc(self->ifname, 0); ASSERT_GE(self->fd2, 0); } @@ -168,7 +370,7 @@ FIXTURE(tun_deleted) FIXTURE_SETUP(tun_deleted) { self->ifname[0] = 0; - self->fd = tun_alloc(self->ifname); + self->fd = tun_alloc(self->ifname, 0); ASSERT_LE(0, self->fd); ASSERT_EQ(0, tun_delete(self->ifname)) @@ -233,4 +435,368 @@ TEST_F(tun_deleted, setvnethash) EXPECT_EQ(EBADFD, errno); } -TEST_HARNESS_MAIN +FIXTURE(tun_vnet_hash) +{ + int local_fd; + int source_fd; + int dest_fds[3]; +}; + +FIXTURE_SETUP(tun_vnet_hash) +{ + static const struct { + struct tun_vnet_hash hdr; + struct tun_vnet_hash_rss rss; + uint16_t rss_indirection_table[2]; + uint8_t rss_key[40]; + } vnet_hash = { + .hdr = { + .flags = TUN_VNET_HASH_REPORT | TUN_VNET_HASH_RSS, + .types = VIRTIO_NET_RSS_HASH_TYPE_IPv4 | + VIRTIO_NET_RSS_HASH_TYPE_TCPv4 | + VIRTIO_NET_RSS_HASH_TYPE_UDPv4 | + VIRTIO_NET_RSS_HASH_TYPE_IPv6 | + VIRTIO_NET_RSS_HASH_TYPE_TCPv6 | + VIRTIO_NET_RSS_HASH_TYPE_UDPv6 + }, + .rss = { .indirection_table_mask = 1, .unclassified_queue = 5 }, + .rss_indirection_table = { 3, 4 }, + .rss_key = { + 0x6d, 0x5a, 0x56, 0xda, 0x25, 0x5b, 0x0e, 0xc2, + 0x41, 0x67, 0x25, 0x3d, 0x43, 0xa3, 0x8f, 0xb0, + 0xd0, 0xca, 0x2b, 0xcb, 0xae, 0x7b, 0x30, 0xb4, + 0x77, 0xcb, 0x2d, 0xa3, 0x80, 0x30, 0xf2, 0x0c, + 0x6a, 0x42, 0xb7, 0x3b, 0xbe, 0xac, 0x01, 0xfa + } + }; + + struct { + struct virtio_net_hdr_v1_hash vnet_hdr; + struct ethhdr ethhdr; + struct arphdr arphdr; + unsigned char sender_hwaddr[6]; + uint32_t sender_ipaddr; + unsigned char target_hwaddr[6]; + uint32_t target_ipaddr; + } __packed packet = { + .ethhdr = { + .h_source = TUN_HWADDR_SOURCE, + .h_dest = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }, + .h_proto = htons(ETH_P_ARP) + }, + .arphdr = { + .ar_hrd = htons(ARPHRD_ETHER), + .ar_pro = htons(ETH_P_IP), + .ar_hln = ETH_ALEN, + .ar_pln = 4, + .ar_op = htons(ARPOP_REQUEST) + }, + .sender_hwaddr = TUN_HWADDR_DEST, + .sender_ipaddr = TUN_IPADDR_DEST, + .target_ipaddr = TUN_IPADDR_DEST + }; + + struct tun_vnet_hash cap; + char source_ifname[IFNAMSIZ] = ""; + char dest_ifname[IFNAMSIZ] = ""; + int i; + + self->local_fd = socket(AF_LOCAL, SOCK_STREAM, 0); + ASSERT_LE(0, self->local_fd); + + self->source_fd = tun_alloc(source_ifname, 0); + ASSERT_LE(0, self->source_fd) { + EXPECT_EQ(0, close(self->local_fd)); + } + + i = ioctl(self->source_fd, TUNGETVNETHASHCAP, &cap); + if (i == -1 && errno == EINVAL) { + EXPECT_EQ(0, close(self->local_fd)); + SKIP(return, "TUNGETVNETHASHCAP not supported"); + } + + ASSERT_EQ(0, i) + EXPECT_EQ(0, close(self->local_fd)); + + if ((cap.flags & vnet_hash.hdr.flags) != vnet_hash.hdr.flags) { + EXPECT_EQ(0, close(self->local_fd)); + SKIP(return, "Lacks some hash flag support"); + } + + if ((cap.types & vnet_hash.hdr.types) != vnet_hash.hdr.types) { + EXPECT_EQ(0, close(self->local_fd)); + SKIP(return, "Lacks some hash type support"); + } + + ASSERT_TRUE(tun_set_flags(self->local_fd, source_ifname, IFF_UP)) + EXPECT_EQ(0, close(self->local_fd)); + + self->dest_fds[0] = tun_alloc(dest_ifname, IFF_VNET_HDR); + ASSERT_LE(0, self->dest_fds[0]) { + EXPECT_EQ(0, close(self->source_fd)); + EXPECT_EQ(0, close(self->local_fd)); + } + + i = sizeof(struct virtio_net_hdr_v1_hash); + ASSERT_EQ(0, ioctl(self->dest_fds[0], TUNSETVNETHDRSZ, &i)) { + EXPECT_EQ(0, close(self->dest_fds[0])); + EXPECT_EQ(0, close(self->source_fd)); + EXPECT_EQ(0, close(self->local_fd)); + } + + i = 1; + ASSERT_EQ(0, ioctl(self->dest_fds[0], TUNSETVNETLE, &i)) { + EXPECT_EQ(0, close(self->dest_fds[0])); + EXPECT_EQ(0, close(self->source_fd)); + EXPECT_EQ(0, close(self->local_fd)); + } + + ASSERT_TRUE(tun_set_flags(self->local_fd, dest_ifname, IFF_UP)) { + EXPECT_EQ(0, close(self->dest_fds[0])); + EXPECT_EQ(0, close(self->source_fd)); + EXPECT_EQ(0, close(self->local_fd)); + } + + ASSERT_EQ(sizeof(packet), + write(self->dest_fds[0], &packet, sizeof(packet))) { + EXPECT_EQ(0, close(self->dest_fds[0])); + EXPECT_EQ(0, close(self->source_fd)); + EXPECT_EQ(0, close(self->local_fd)); + } + + ASSERT_EQ(0, ioctl(self->dest_fds[0], TUNSETVNETHASH, &vnet_hash)) { + EXPECT_EQ(0, close(self->dest_fds[0])); + EXPECT_EQ(0, close(self->source_fd)); + EXPECT_EQ(0, close(self->local_fd)); + } + + for (i = 1; i < ARRAY_SIZE(self->dest_fds); i++) { + self->dest_fds[i] = tun_alloc(dest_ifname, IFF_VNET_HDR); + ASSERT_LE(0, self->dest_fds[i]) { + while (i) { + i--; + EXPECT_EQ(0, close(self->local_fd)); + } + + EXPECT_EQ(0, close(self->source_fd)); + EXPECT_EQ(0, close(self->local_fd)); + } + } + + ASSERT_EQ(0, ioctl(self->local_fd, SIOCBRADDBR, "xbridge")) { + EXPECT_EQ(0, ioctl(self->local_fd, SIOCBRDELBR, "xbridge")); + + for (i = 0; i < ARRAY_SIZE(self->dest_fds); i++) + EXPECT_EQ(0, close(self->dest_fds[i])); + + EXPECT_EQ(0, close(self->source_fd)); + EXPECT_EQ(0, close(self->local_fd)); + } + + ASSERT_TRUE(tun_add_to_bridge(self->local_fd, source_ifname)) { + EXPECT_EQ(0, ioctl(self->local_fd, SIOCBRDELBR, "xbridge")); + + for (i = 0; i < ARRAY_SIZE(self->dest_fds); i++) + EXPECT_EQ(0, close(self->dest_fds[i])); + + EXPECT_EQ(0, close(self->source_fd)); + EXPECT_EQ(0, close(self->local_fd)); + } + + ASSERT_TRUE(tun_add_to_bridge(self->local_fd, dest_ifname)) { + EXPECT_EQ(0, ioctl(self->local_fd, SIOCBRDELBR, "xbridge")); + + for (i = 0; i < ARRAY_SIZE(self->dest_fds); i++) + EXPECT_EQ(0, close(self->dest_fds[i])); + + EXPECT_EQ(0, close(self->source_fd)); + EXPECT_EQ(0, close(self->local_fd)); + } + + ASSERT_TRUE(tun_set_flags(self->local_fd, "xbridge", IFF_UP)) { + EXPECT_EQ(0, ioctl(self->local_fd, SIOCBRDELBR, "xbridge")); + + for (i = 0; i < ARRAY_SIZE(self->dest_fds); i++) + EXPECT_EQ(0, close(self->dest_fds[i])); + + EXPECT_EQ(0, close(self->source_fd)); + EXPECT_EQ(0, close(self->local_fd)); + } +} + +FIXTURE_TEARDOWN(tun_vnet_hash) +{ + ASSERT_TRUE(tun_set_flags(self->local_fd, "xbridge", 0)) { + for (size_t i = 0; i < ARRAY_SIZE(self->dest_fds); i++) + EXPECT_EQ(0, close(self->dest_fds[i])); + + EXPECT_EQ(0, close(self->source_fd)); + EXPECT_EQ(0, close(self->local_fd)); + } + + EXPECT_EQ(0, ioctl(self->local_fd, SIOCBRDELBR, "xbridge")); + + for (size_t i = 0; i < ARRAY_SIZE(self->dest_fds); i++) + EXPECT_EQ(0, close(self->dest_fds[i])); + + EXPECT_EQ(0, close(self->source_fd)); + EXPECT_EQ(0, close(self->local_fd)); +} + +TEST_F(tun_vnet_hash, unclassified) +{ + struct { + struct ethhdr ethhdr; + struct iphdr iphdr; + } __packed packet; + + tun_build_ethhdr(&packet.ethhdr, ETH_P_LOOPBACK); + + EXPECT_TRUE(tun_vnet_hash_check(self->source_fd, self->dest_fds, + &packet, sizeof(packet), 0, + VIRTIO_NET_HASH_REPORT_NONE, 0)); +} + +TEST_F(tun_vnet_hash, ipv4) +{ + struct { + struct ethhdr ethhdr; + struct iphdr iphdr; + } __packed packet; + + tun_build_ethhdr(&packet.ethhdr, ETH_P_IP); + tun_build_iphdr(&packet.iphdr, 0, 253); + + EXPECT_TRUE(tun_vnet_hash_check(self->source_fd, self->dest_fds, + &packet, sizeof(packet), 0, + VIRTIO_NET_HASH_REPORT_IPv4, + 0x6e45d952)); +} + +TEST_F(tun_vnet_hash, tcpv4) +{ + struct { + struct ethhdr ethhdr; + struct iphdr iphdr; + struct tcphdr tcphdr; + } __packed packet; + + tun_build_ethhdr(&packet.ethhdr, ETH_P_IP); + tun_build_iphdr(&packet.iphdr, sizeof(struct tcphdr), IPPROTO_TCP); + + tun_build_tcphdr(&packet.tcphdr, + tun_build_ip_pseudo_sum(&packet.iphdr)); + + EXPECT_TRUE(tun_vnet_hash_check(self->source_fd, self->dest_fds, + &packet, sizeof(packet), + VIRTIO_NET_HDR_F_DATA_VALID, + VIRTIO_NET_HASH_REPORT_TCPv4, + 0xfb63539a)); +} + +TEST_F(tun_vnet_hash, udpv4) +{ + struct { + struct ethhdr ethhdr; + struct iphdr iphdr; + struct udphdr udphdr; + } __packed packet; + + tun_build_ethhdr(&packet.ethhdr, ETH_P_IP); + tun_build_iphdr(&packet.iphdr, sizeof(struct udphdr), IPPROTO_UDP); + + tun_build_udphdr(&packet.udphdr, + tun_build_ip_pseudo_sum(&packet.iphdr)); + + EXPECT_TRUE(tun_vnet_hash_check(self->source_fd, self->dest_fds, + &packet, sizeof(packet), + VIRTIO_NET_HDR_F_DATA_VALID, + VIRTIO_NET_HASH_REPORT_UDPv4, + 0xfb63539a)); +} + +TEST_F(tun_vnet_hash, ipv6) +{ + struct { + struct ethhdr ethhdr; + struct ipv6hdr ipv6hdr; + } __packed packet; + + tun_build_ethhdr(&packet.ethhdr, ETH_P_IPV6); + tun_build_ipv6hdr(&packet.ipv6hdr, 0, 253); + + EXPECT_TRUE(tun_vnet_hash_check(self->source_fd, self->dest_fds, + &packet, sizeof(packet), 0, + VIRTIO_NET_HASH_REPORT_IPv6, + 0xd6eb560f)); +} + +TEST_F(tun_vnet_hash, tcpv6) +{ + struct { + struct ethhdr ethhdr; + struct ipv6hdr ipv6hdr; + struct tcphdr tcphdr; + } __packed packet; + + tun_build_ethhdr(&packet.ethhdr, ETH_P_IPV6); + tun_build_ipv6hdr(&packet.ipv6hdr, sizeof(struct tcphdr), IPPROTO_TCP); + + tun_build_tcphdr(&packet.tcphdr, + tun_build_ipv6_pseudo_sum(&packet.ipv6hdr)); + + EXPECT_TRUE(tun_vnet_hash_check(self->source_fd, self->dest_fds, + &packet, sizeof(packet), + VIRTIO_NET_HDR_F_DATA_VALID, + VIRTIO_NET_HASH_REPORT_TCPv6, + 0xc2b9f251)); +} + +TEST_F(tun_vnet_hash, udpv6) +{ + struct { + struct ethhdr ethhdr; + struct ipv6hdr ipv6hdr; + struct udphdr udphdr; + } __packed packet; + + tun_build_ethhdr(&packet.ethhdr, ETH_P_IPV6); + tun_build_ipv6hdr(&packet.ipv6hdr, sizeof(struct udphdr), IPPROTO_UDP); + + tun_build_udphdr(&packet.udphdr, + tun_build_ipv6_pseudo_sum(&packet.ipv6hdr)); + + EXPECT_TRUE(tun_vnet_hash_check(self->source_fd, self->dest_fds, + &packet, sizeof(packet), + VIRTIO_NET_HDR_F_DATA_VALID, + VIRTIO_NET_HASH_REPORT_UDPv6, + 0xc2b9f251)); +} + +int main(int argc, char **argv) +{ + FILE *file; + + if (unshare(CLONE_NEWNET)) { + perror("unshare"); + return KSFT_FAIL; + } + + file = fopen("/proc/sys/net/ipv6/conf/default/disable_ipv6", "w"); + if (file) { + if (fputc('1', file) != '1') { + perror("fputc"); + return KSFT_FAIL; + } + + if (fclose(file)) { + perror("fclose"); + return KSFT_FAIL; + } + } else if (errno != ENOENT) { + perror("fopen"); + return KSFT_FAIL; + } + + return test_harness_run(argc, argv); +}