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[204.195.96.226]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-435e10e483asm8673333f8f.3.2026.01.28.11.01.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 28 Jan 2026 11:01:32 -0800 (PST) From: Stephen Hemminger To: dev@dpdk.org Cc: Stephen Hemminger Subject: [PATCH v8 0/5] net/null: improvements and bug fixes Date: Wed, 28 Jan 2026 11:00:08 -0800 Message-ID: <20260128190127.465743-1-stephen@networkplumber.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260104222523.329760-1-stephen@networkplumber.org> References: <20260104222523.329760-1-stephen@networkplumber.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org This series makes several improvements to the null PMD driver and adds comprehensive unit tests. The series: 1) Cleans up the info_get callback by removing redundant argument checks and using proper constants (UINT32_MAX instead of cast). 2) Extends the packet burst generator to support larger packets by changing type from uint8_t to uint16_t, enabling better testing of drivers with various packet sizes. 3) Adds a comprehensive unit test for the null PMD covering RX/TX, statistics, custom packet sizes, copy mode, no-RX mode, link status, device info, RSS, RETA, and multi-threaded TX. 4) Adds validation that the mbuf pool passed to rx_queue_setup has sufficient data room for the configured packet size. This prevents generating invalid mbufs in copy mode. 5) Adds validation that the packet size devarg doesn't exceed UINT16_MAX, which is the maximum size for a single mbuf data segment. Patches 4 and 5 are marked for stable backport as they fix potential issues where invalid mbufs could be generated. v8: - Rebased to latest main - Minor revision to avoid changes in later fixes v7: - Added release notes to patch 1 - Simplified test code by using single-line comments and struct initializers instead of explicit zeroing - Added two new bug fix patches (patches 4 and 5) that validate packet size against mbuf data room constraints Stephen Hemminger (5): net/null: cleanup info response test: generate larger packet bursts test: add a test for null PMD net/null: add check for pool vs packet size net/null: check packet size argument app/test/meson.build | 1 + app/test/packet_burst_generator.c | 34 +- app/test/packet_burst_generator.h | 4 +- app/test/test_pmd_null.c | 916 +++++++++++++++++++++++++ doc/guides/rel_notes/release_26_03.rst | 10 + drivers/net/null/rte_eth_null.c | 21 +++--- 6 files changed, 959 insertions(+), 27 deletions(-) create mode 100644 app/test/test_pmd_null.c Stephen Hemminger (5): net/null: cleanup info response test: generate larger packet bursts test: add a test for null PMD net/null: add check for pool vs packet size net/null: check packet size argument app/test/meson.build | 1 + app/test/packet_burst_generator.c | 34 +- app/test/packet_burst_generator.h | 4 +- app/test/test_pmd_null.c | 936 ++++++++++++++++++++++++++++++ drivers/net/null/rte_eth_null.c | 20 +- 5 files changed, 970 insertions(+), 25 deletions(-) create mode 100644 app/test/test_pmd_null.c -- 2.51.0