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ab63a2387c
The ethtool-nl family does a good job exposing various protocol related and IEEE/IETF statistics which used to get dumped under ethtool -S, with creative names. Queue stats don't have a netlink API, yet, and remain a lion's share of ethtool -S output for new drivers. Not only is that bad because the names differ driver to driver but it's also bug-prone. Intuitively drivers try to report only the stats for active queues, but querying ethtool stats involves multiple system calls, and the number of stats is read separately from the stats themselves. Worse still when user space asks for values of the stats, it doesn't inform the kernel how big the buffer is. If number of stats increases in the meantime kernel will overflow user buffer. Add a netlink API for dumping queue stats. Queue information is exposed via the netdev-genl family, so add the stats there. Support per-queue and sum-for-device dumps. Latter will be useful when subsequent patches add more interesting common stats than just bytes and packets. The API does not currently distinguish between HW and SW stats. The expectation is that the source of the stats will either not matter much (good packets) or be obvious (skb alloc errors). Acked-by: Stanislav Fomichev <sdf@google.com> Reviewed-by: Amritha Nambiar <amritha.nambiar@intel.com> Reviewed-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Link: https://lore.kernel.org/r/20240306195509.1502746-2-kuba@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
171 lines
5.1 KiB
C
171 lines
5.1 KiB
C
// SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)
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/* Do not edit directly, auto-generated from: */
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/* Documentation/netlink/specs/netdev.yaml */
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/* YNL-GEN kernel source */
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#include <net/netlink.h>
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#include <net/genetlink.h>
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#include "netdev-genl-gen.h"
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#include <uapi/linux/netdev.h>
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/* Integer value ranges */
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static const struct netlink_range_validation netdev_a_page_pool_id_range = {
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.min = 1ULL,
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.max = 4294967295ULL,
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};
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static const struct netlink_range_validation netdev_a_page_pool_ifindex_range = {
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.min = 1ULL,
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.max = 2147483647ULL,
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};
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/* Common nested types */
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const struct nla_policy netdev_page_pool_info_nl_policy[NETDEV_A_PAGE_POOL_IFINDEX + 1] = {
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[NETDEV_A_PAGE_POOL_ID] = NLA_POLICY_FULL_RANGE(NLA_UINT, &netdev_a_page_pool_id_range),
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[NETDEV_A_PAGE_POOL_IFINDEX] = NLA_POLICY_FULL_RANGE(NLA_U32, &netdev_a_page_pool_ifindex_range),
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};
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/* NETDEV_CMD_DEV_GET - do */
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static const struct nla_policy netdev_dev_get_nl_policy[NETDEV_A_DEV_IFINDEX + 1] = {
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[NETDEV_A_DEV_IFINDEX] = NLA_POLICY_MIN(NLA_U32, 1),
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};
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/* NETDEV_CMD_PAGE_POOL_GET - do */
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#ifdef CONFIG_PAGE_POOL
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static const struct nla_policy netdev_page_pool_get_nl_policy[NETDEV_A_PAGE_POOL_ID + 1] = {
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[NETDEV_A_PAGE_POOL_ID] = NLA_POLICY_FULL_RANGE(NLA_UINT, &netdev_a_page_pool_id_range),
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};
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#endif /* CONFIG_PAGE_POOL */
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/* NETDEV_CMD_PAGE_POOL_STATS_GET - do */
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#ifdef CONFIG_PAGE_POOL_STATS
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static const struct nla_policy netdev_page_pool_stats_get_nl_policy[NETDEV_A_PAGE_POOL_STATS_INFO + 1] = {
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[NETDEV_A_PAGE_POOL_STATS_INFO] = NLA_POLICY_NESTED(netdev_page_pool_info_nl_policy),
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};
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#endif /* CONFIG_PAGE_POOL_STATS */
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/* NETDEV_CMD_QUEUE_GET - do */
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static const struct nla_policy netdev_queue_get_do_nl_policy[NETDEV_A_QUEUE_TYPE + 1] = {
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[NETDEV_A_QUEUE_IFINDEX] = NLA_POLICY_MIN(NLA_U32, 1),
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[NETDEV_A_QUEUE_TYPE] = NLA_POLICY_MAX(NLA_U32, 1),
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[NETDEV_A_QUEUE_ID] = { .type = NLA_U32, },
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};
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/* NETDEV_CMD_QUEUE_GET - dump */
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static const struct nla_policy netdev_queue_get_dump_nl_policy[NETDEV_A_QUEUE_IFINDEX + 1] = {
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[NETDEV_A_QUEUE_IFINDEX] = NLA_POLICY_MIN(NLA_U32, 1),
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};
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/* NETDEV_CMD_NAPI_GET - do */
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static const struct nla_policy netdev_napi_get_do_nl_policy[NETDEV_A_NAPI_ID + 1] = {
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[NETDEV_A_NAPI_ID] = { .type = NLA_U32, },
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};
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/* NETDEV_CMD_NAPI_GET - dump */
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static const struct nla_policy netdev_napi_get_dump_nl_policy[NETDEV_A_NAPI_IFINDEX + 1] = {
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[NETDEV_A_NAPI_IFINDEX] = NLA_POLICY_MIN(NLA_U32, 1),
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};
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/* NETDEV_CMD_QSTATS_GET - dump */
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static const struct nla_policy netdev_qstats_get_nl_policy[NETDEV_A_QSTATS_SCOPE + 1] = {
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[NETDEV_A_QSTATS_SCOPE] = NLA_POLICY_MASK(NLA_UINT, 0x1),
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};
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/* Ops table for netdev */
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static const struct genl_split_ops netdev_nl_ops[] = {
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{
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.cmd = NETDEV_CMD_DEV_GET,
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.doit = netdev_nl_dev_get_doit,
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.policy = netdev_dev_get_nl_policy,
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.maxattr = NETDEV_A_DEV_IFINDEX,
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.flags = GENL_CMD_CAP_DO,
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},
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{
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.cmd = NETDEV_CMD_DEV_GET,
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.dumpit = netdev_nl_dev_get_dumpit,
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.flags = GENL_CMD_CAP_DUMP,
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},
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#ifdef CONFIG_PAGE_POOL
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{
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.cmd = NETDEV_CMD_PAGE_POOL_GET,
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.doit = netdev_nl_page_pool_get_doit,
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.policy = netdev_page_pool_get_nl_policy,
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.maxattr = NETDEV_A_PAGE_POOL_ID,
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.flags = GENL_CMD_CAP_DO,
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},
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{
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.cmd = NETDEV_CMD_PAGE_POOL_GET,
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.dumpit = netdev_nl_page_pool_get_dumpit,
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.flags = GENL_CMD_CAP_DUMP,
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},
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#endif /* CONFIG_PAGE_POOL */
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#ifdef CONFIG_PAGE_POOL_STATS
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{
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.cmd = NETDEV_CMD_PAGE_POOL_STATS_GET,
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.doit = netdev_nl_page_pool_stats_get_doit,
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.policy = netdev_page_pool_stats_get_nl_policy,
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.maxattr = NETDEV_A_PAGE_POOL_STATS_INFO,
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.flags = GENL_CMD_CAP_DO,
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},
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{
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.cmd = NETDEV_CMD_PAGE_POOL_STATS_GET,
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.dumpit = netdev_nl_page_pool_stats_get_dumpit,
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.flags = GENL_CMD_CAP_DUMP,
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},
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#endif /* CONFIG_PAGE_POOL_STATS */
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{
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.cmd = NETDEV_CMD_QUEUE_GET,
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.doit = netdev_nl_queue_get_doit,
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.policy = netdev_queue_get_do_nl_policy,
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.maxattr = NETDEV_A_QUEUE_TYPE,
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.flags = GENL_CMD_CAP_DO,
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},
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{
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.cmd = NETDEV_CMD_QUEUE_GET,
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.dumpit = netdev_nl_queue_get_dumpit,
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.policy = netdev_queue_get_dump_nl_policy,
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.maxattr = NETDEV_A_QUEUE_IFINDEX,
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.flags = GENL_CMD_CAP_DUMP,
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},
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{
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.cmd = NETDEV_CMD_NAPI_GET,
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.doit = netdev_nl_napi_get_doit,
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.policy = netdev_napi_get_do_nl_policy,
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.maxattr = NETDEV_A_NAPI_ID,
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.flags = GENL_CMD_CAP_DO,
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},
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{
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.cmd = NETDEV_CMD_NAPI_GET,
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.dumpit = netdev_nl_napi_get_dumpit,
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.policy = netdev_napi_get_dump_nl_policy,
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.maxattr = NETDEV_A_NAPI_IFINDEX,
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.flags = GENL_CMD_CAP_DUMP,
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},
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{
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.cmd = NETDEV_CMD_QSTATS_GET,
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.dumpit = netdev_nl_qstats_get_dumpit,
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.policy = netdev_qstats_get_nl_policy,
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.maxattr = NETDEV_A_QSTATS_SCOPE,
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.flags = GENL_CMD_CAP_DUMP,
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},
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};
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static const struct genl_multicast_group netdev_nl_mcgrps[] = {
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[NETDEV_NLGRP_MGMT] = { "mgmt", },
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[NETDEV_NLGRP_PAGE_POOL] = { "page-pool", },
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};
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struct genl_family netdev_nl_family __ro_after_init = {
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.name = NETDEV_FAMILY_NAME,
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.version = NETDEV_FAMILY_VERSION,
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.netnsok = true,
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.parallel_ops = true,
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.module = THIS_MODULE,
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.split_ops = netdev_nl_ops,
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.n_split_ops = ARRAY_SIZE(netdev_nl_ops),
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.mcgrps = netdev_nl_mcgrps,
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.n_mcgrps = ARRAY_SIZE(netdev_nl_mcgrps),
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};
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