Patches 1-2 are documentation and bug fixes that stand alone: update the features matrix to match current driver capabilities, and fix queue statistics to count all queues regardless of the queue stat counter limit.
Patch 3 fixes interface name buffers to use IFNAMSIZ instead of RTE_ETH_NAME_MAX_LEN, since these are Linux kernel interface names not DPDK device names. Patches 4-6 are minor cleanups: replace the runtime speed capability function with a compile-time constant (TAP is always 10G), clarify TUN/TAP flag operator precedence with parentheses, and extend the fixed MAC index to 16 bits to avoid duplicates after 256 hot-plug cycles. Patches 7-12 fix bugs tagged for stable: a bounds check to prevent an out-of-bounds read on truncated L4 headers; resource leaks in the primary and secondary process probe error paths; a missing free of the IPC reply buffer on queue count mismatch; a use-after-free with an orphaned kernel TC rule when remote flow creation fails; and a leaked remote_flow allocation on EEXIST from an implicit rule. Patches 13-18 restructure the driver internals: dynamically allocate queue structures instead of embedding fixed-size arrays in pmd_internals; replace the pointer-to-VLA iovec with a flexible array member sized from MTU and mbuf geometry; replace the Tx per-packet VLA with a fixed-size stack array capped at 128 segments; remove the VLA in flow item validation; consolidate per-queue statistics into a common structure; and enable -Wvla warnings. Patch 19 adds a unit test suite for the TAP PMD covering configuration, link, stats, MTU, MAC, promisc, allmulti, queue start/stop, link up/down, stop/start, and multi-queue. v5 - use IFNAMSIZ for interface name buffers - dynamically allocate queue structures - compute Rx scatter segments from MTU instead of nb_rx_desc - use flex array for Rx iovecs, fixed stack array for Tx - consolidate queue statistics Stephen Hemminger (19): net/tap: fix handling of queue stats doc: update tap features net/tap: use correct length for interface names net/tap: replace runtime speed capability with constant net/tap: clarify TUN/TAP flag assignment net/tap: extend fixed MAC range to 16 bits net/tap: skip checksum on truncated L4 headers net/tap: fix resource leaks in tap create error path net/tap: fix resource leaks in secondary process probe net/tap: free IPC reply buffer on queue count mismatch net/tap: fix use-after-free on remote flow creation failure net/tap: free remote flow when implicit rule already exists net/tap: dynamically allocate queue structures net/tap: remove VLA in flow item validation net/tap: fix Rx descriptor vs scatter segment confusion net/tap: replace use of VLA in transmit burst net/tap: consolidate queue statistics net/tap: enable VLA warnings test: add unit tests for TAP PMD app/test/meson.build | 1 + app/test/test_pmd_tap.c | 1143 ++++++++++++++++++++++++++++++ doc/guides/nics/features/tap.ini | 14 +- drivers/net/tap/meson.build | 1 - drivers/net/tap/rte_eth_tap.c | 411 ++++++----- drivers/net/tap/rte_eth_tap.h | 28 +- drivers/net/tap/tap_flow.c | 36 +- 7 files changed, 1424 insertions(+), 210 deletions(-) create mode 100644 app/test/test_pmd_tap.c -- 2.51.0
