diff options
Diffstat (limited to 'src/libknot/xdp/xdp.h')
| -rw-r--r-- | src/libknot/xdp/xdp.h | 58 |
1 files changed, 54 insertions, 4 deletions
diff --git a/src/libknot/xdp/xdp.h b/src/libknot/xdp/xdp.h index 6c8bb1e..5944d44 100644 --- a/src/libknot/xdp/xdp.h +++ b/src/libknot/xdp/xdp.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2023 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz> +/* Copyright (C) 2024 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz> This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -53,14 +53,54 @@ typedef struct knot_xdp_socket knot_xdp_socket_t; /*! \brief Configuration of XDP socket. */ struct knot_xdp_config { - bool force_generic; /*!< Use generic XDP mode (avoid driver/hadrware implementation). */ - bool force_copy; /*!< Force copying packet data between kernel and user-space (avoid zero-copy). */ - bool extra_frames; /*!< Extra FQ frames. */ + uint16_t ring_size; /*!< Size of RX and TX rings (must be power of 2). */ + bool force_generic; /*!< Use generic XDP mode (avoid driver/hardware implementation). */ + bool force_copy; /*!< Force copying packet data between kernel and user-space (avoid zero-copy). */ + unsigned busy_poll_timeout; /*!< Preferred busy poll budget (0 means disabled). */ + unsigned busy_poll_budget; /*!< Preferred busy poll timeout (in microseconds) . */ }; /*! \brief Configuration of XDP socket. */ typedef struct knot_xdp_config knot_xdp_config_t; +/*! \brief Various statistics of an XDP socket (optimally kernel >=5.9). */ +typedef struct { + /*! Interface name. */ + const char *if_name; + /*! Interface name index (derived from ifname). */ + int if_index; + /*! Network card queue id. */ + unsigned if_queue; + /*! Counters (xdp_statistics) retrieved from the kernel via XDP_STATISTICS. */ + struct { + /*! Dropped for other reasons. */ + uint64_t rx_dropped; + /*! Dropped due to invalid descriptor. */ + uint64_t rx_invalid; + /*! Dropped due to invalid descriptor. */ + uint64_t tx_invalid; + /*! Dropped due to rx ring being full. */ + uint64_t rx_full; + /*! Failed to retrieve item from fill ring. */ + uint64_t fq_empty; + /*! Failed to retrieve item from tx ring. */ + uint64_t tx_empty; + } socket; + /*! States of rings of the XDP socket. */ + struct { + /*! Busy TX buffers. */ + uint16_t tx_busy; + /*! Free buffers to consume from FQ ring. */ + uint16_t fq_fill; + /*! Pending buffers in TX ring. */ + uint16_t rx_fill; + /*! Pending buffers in RX ring. */ + uint16_t tx_fill; + /*! Pending buffers in CQ ring. */ + uint16_t cq_fill; + } rings; +} knot_xdp_stats_t; + /*! * \brief Initialize XDP socket. * @@ -196,4 +236,14 @@ void knot_xdp_recv_finish(knot_xdp_socket_t *socket, const knot_xdp_msg_t msgs[] */ void knot_xdp_socket_info(const knot_xdp_socket_t *socket, FILE *file); +/*! + * \brief Gets various statistics of the XDP socket. + * + * \param socket XDP socket. + * \param stats Output structure. + * + * \return KNOT_E* + */ +int knot_xdp_socket_stats(knot_xdp_socket_t *socket, knot_xdp_stats_t *stats); + /*! @} */ |