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Thu, 05 Sep 2024 16:11:18 +0800 (CST) From: Pu Lehui To: bpf@vger.kernel.org, linux-riscv@lists.infradead.org, netdev@vger.kernel.org Cc: Andrii Nakryiko , Eduard Zingerman , Mykola Lysenko , =?utf-8?b?QmrDtnJuIFTDtnBlbA==?= , Puranjay Mohan , Alexei Starovoitov , Daniel Borkmann , Martin KaFai Lau , Song Liu , Yonghong Song , John Fastabend , KP Singh , Stanislav Fomichev , Hao Luo , Jiri Olsa , Palmer Dabbelt , Pu Lehui Subject: [PATCH bpf-next v3 02/10] selftests/bpf: Rename fallback in bpf_dctcp to avoid naming conflict Date: Thu, 5 Sep 2024 08:13:53 +0000 Message-Id: <20240905081401.1894789-3-pulehui@huaweicloud.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240905081401.1894789-1-pulehui@huaweicloud.com> References: <20240905081401.1894789-1-pulehui@huaweicloud.com> MIME-Version: 1.0 X-CM-TRANSID: cCh0CgD3Ii+gZ9lmMQ7AAQ--.26932S4 X-Coremail-Antispam: 1UD129KBjvJXoWxCFW8GF1fAF15Zr48ZrW5ZFb_yoW5CF4kpa 4kZ3yYyF1xJFW3Jw17GrWqgFWFkws5XrWYkan7Wr15Ar17XryxWrs7KF4Yga9xWrZ5uwnx Aas2g3s3Ar1kZ37anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUPIb4IE77IF4wAFF20E14v26rWj6s0DM7CY07I20VC2zVCF04k2 6cxKx2IYs7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M28IrcIa0xkI8VA2jI8067AKxVWUXw A2048vs2IY020Ec7CjxVAFwI0_Xr0E3s1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0rcxS w2x7M28EF7xvwVC0I7IYx2IY67AKxVWDJVCq3wA2z4x0Y4vE2Ix0cI8IcVCY1x0267AKxV W8Jr0_Cr1UM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E14v2 6rxl6s0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMc Ij6xIIjxv20xvE14v26r1j6r18McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_ Jr0_Gr1lF7xvr2IYc2Ij64vIr41lFIxGxcIEc7CjxVA2Y2ka0xkIwI1lc7CjxVAaw2AFwI 0_GFv_Wryl42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG 67AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r4a6rW5MI IYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_Jr0_JF4lIxAIcVC0I7IYx2IY6xkF7I0E 14v26F4j6r4UJwCI42IY6xAIw20EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Jr 0_Gr1lIxAIcVC2z280aVCY1x0267AKxVW8Jr0_Cr1UYxBIdaVFxhVjvjDU0xZFpf9x07jI sjbUUUUU= X-CM-SenderInfo: psxovxtxl6x35dzhxuhorxvhhfrp/ X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240905_091139_394894_1FFD4FDA X-CRM114-Status: GOOD ( 12.05 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org From: Pu Lehui Recently, when compiling bpf selftests on RV64, the following compilation failure occurred: progs/bpf_dctcp.c:29:21: error: redefinition of 'fallback' as different kind of symbol 29 | volatile const char fallback[TCP_CA_NAME_MAX]; | ^ /workspace/tools/testing/selftests/bpf/tools/include/vmlinux.h:86812:15: note: previous definition is here 86812 | typedef u32 (*fallback)(u32, const unsigned char *, size_t); The reason is that the `fallback` symbol has been defined in arch/riscv/lib/crc32.c, which will cause symbol conflicts when vmlinux.h is included in bpf_dctcp. Let we rename `fallback` string to `fallback_cc` in bpf_dctcp to fix this compilation failure. Signed-off-by: Pu Lehui --- tools/testing/selftests/bpf/prog_tests/bpf_tcp_ca.c | 2 +- tools/testing/selftests/bpf/progs/bpf_dctcp.c | 8 ++++---- 2 files changed, 5 insertions(+), 5 deletions(-) diff --git a/tools/testing/selftests/bpf/prog_tests/bpf_tcp_ca.c b/tools/testing/selftests/bpf/prog_tests/bpf_tcp_ca.c index 1d494b4453f4..409a06975823 100644 --- a/tools/testing/selftests/bpf/prog_tests/bpf_tcp_ca.c +++ b/tools/testing/selftests/bpf/prog_tests/bpf_tcp_ca.c @@ -285,7 +285,7 @@ static void test_dctcp_fallback(void) dctcp_skel = bpf_dctcp__open(); if (!ASSERT_OK_PTR(dctcp_skel, "dctcp_skel")) return; - strcpy(dctcp_skel->rodata->fallback, "cubic"); + strcpy(dctcp_skel->rodata->fallback_cc, "cubic"); if (!ASSERT_OK(bpf_dctcp__load(dctcp_skel), "bpf_dctcp__load")) goto done; diff --git a/tools/testing/selftests/bpf/progs/bpf_dctcp.c b/tools/testing/selftests/bpf/progs/bpf_dctcp.c index 02f552e7fd4d..7cd73e75f52a 100644 --- a/tools/testing/selftests/bpf/progs/bpf_dctcp.c +++ b/tools/testing/selftests/bpf/progs/bpf_dctcp.c @@ -26,7 +26,7 @@ static bool before(__u32 seq1, __u32 seq2) char _license[] SEC("license") = "GPL"; -volatile const char fallback[TCP_CA_NAME_MAX]; +volatile const char fallback_cc[TCP_CA_NAME_MAX]; const char bpf_dctcp[] = "bpf_dctcp"; const char tcp_cdg[] = "cdg"; char cc_res[TCP_CA_NAME_MAX]; @@ -71,10 +71,10 @@ void BPF_PROG(bpf_dctcp_init, struct sock *sk) struct bpf_dctcp *ca = inet_csk_ca(sk); int *stg; - if (!(tp->ecn_flags & TCP_ECN_OK) && fallback[0]) { + if (!(tp->ecn_flags & TCP_ECN_OK) && fallback_cc[0]) { /* Switch to fallback */ if (bpf_setsockopt(sk, SOL_TCP, TCP_CONGESTION, - (void *)fallback, sizeof(fallback)) == -EBUSY) + (void *)fallback_cc, sizeof(fallback_cc)) == -EBUSY) ebusy_cnt++; /* Switch back to myself and the recurred bpf_dctcp_init() @@ -87,7 +87,7 @@ void BPF_PROG(bpf_dctcp_init, struct sock *sk) /* Switch back to fallback */ if (bpf_setsockopt(sk, SOL_TCP, TCP_CONGESTION, - (void *)fallback, sizeof(fallback)) == -EBUSY) + (void *)fallback_cc, sizeof(fallback_cc)) == -EBUSY) ebusy_cnt++; /* Expecting -ENOTSUPP for tcp_cdg_res */