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241a94abcf
No functional change intended, aliases will be used in followup commits. Note for backporters: you may need to add aliases also for modules that are already removed in mainline kernel but still in your version. Patches were generated with the help of Coccinelle scripts like: cat >scripts/coccinelle/misc/tcf_alias.cocci <<EOD virtual patch virtual report @ haskernel @ @@ @ tcf_has_kind depends on report && haskernel @ identifier ops; constant K; @@ static struct tcf_proto_ops ops = { .kind = K, ... }; +char module_alias = K; EOD /usr/bin/spatch -D report --cocci-file scripts/coccinelle/misc/tcf_alias.cocci \ --dir . \ -I ./arch/x86/include -I ./arch/x86/include/generated -I ./include \ -I ./arch/x86/include/uapi -I ./arch/x86/include/generated/uapi \ -I ./include/uapi -I ./include/generated/uapi \ --include ./include/linux/compiler-version.h --include ./include/linux/kconfig.h \ --jobs 8 --chunksize 1 2>/dev/null | \ sed 's/char module_alias = "\([^"]*\)";/MODULE_ALIAS_NET_CLS("\1");/' And analogously for: static struct tc_action_ops ops = { .kind = K, static struct Qdisc_ops ops = { .id = K, (Someone familiar would be able to fit those into one .cocci file without sed post processing.) Signed-off-by: Michal Koutný <mkoutny@suse.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Reviewed-by: Jiri Pirko <jiri@nvidia.com> Link: https://lore.kernel.org/r/20240201130943.19536-3-mkoutny@suse.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
794 lines
20 KiB
C
794 lines
20 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* net/sched/sch_mqprio.c
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*
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* Copyright (c) 2010 John Fastabend <john.r.fastabend@intel.com>
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*/
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#include <linux/ethtool_netlink.h>
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include <linux/skbuff.h>
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#include <linux/module.h>
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#include <net/netlink.h>
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#include <net/pkt_sched.h>
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#include <net/sch_generic.h>
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#include <net/pkt_cls.h>
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#include "sch_mqprio_lib.h"
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struct mqprio_sched {
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struct Qdisc **qdiscs;
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u16 mode;
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u16 shaper;
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int hw_offload;
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u32 flags;
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u64 min_rate[TC_QOPT_MAX_QUEUE];
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u64 max_rate[TC_QOPT_MAX_QUEUE];
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u32 fp[TC_QOPT_MAX_QUEUE];
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};
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static int mqprio_enable_offload(struct Qdisc *sch,
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const struct tc_mqprio_qopt *qopt,
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struct netlink_ext_ack *extack)
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{
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struct mqprio_sched *priv = qdisc_priv(sch);
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struct net_device *dev = qdisc_dev(sch);
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struct tc_mqprio_qopt_offload mqprio = {
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.qopt = *qopt,
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.extack = extack,
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};
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int err, i;
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switch (priv->mode) {
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case TC_MQPRIO_MODE_DCB:
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if (priv->shaper != TC_MQPRIO_SHAPER_DCB)
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return -EINVAL;
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break;
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case TC_MQPRIO_MODE_CHANNEL:
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mqprio.flags = priv->flags;
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if (priv->flags & TC_MQPRIO_F_MODE)
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mqprio.mode = priv->mode;
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if (priv->flags & TC_MQPRIO_F_SHAPER)
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mqprio.shaper = priv->shaper;
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if (priv->flags & TC_MQPRIO_F_MIN_RATE)
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for (i = 0; i < mqprio.qopt.num_tc; i++)
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mqprio.min_rate[i] = priv->min_rate[i];
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if (priv->flags & TC_MQPRIO_F_MAX_RATE)
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for (i = 0; i < mqprio.qopt.num_tc; i++)
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mqprio.max_rate[i] = priv->max_rate[i];
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break;
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default:
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return -EINVAL;
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}
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mqprio_fp_to_offload(priv->fp, &mqprio);
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err = dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_QDISC_MQPRIO,
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&mqprio);
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if (err)
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return err;
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priv->hw_offload = mqprio.qopt.hw;
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return 0;
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}
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static void mqprio_disable_offload(struct Qdisc *sch)
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{
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struct tc_mqprio_qopt_offload mqprio = { { 0 } };
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struct mqprio_sched *priv = qdisc_priv(sch);
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struct net_device *dev = qdisc_dev(sch);
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switch (priv->mode) {
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case TC_MQPRIO_MODE_DCB:
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case TC_MQPRIO_MODE_CHANNEL:
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dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_QDISC_MQPRIO,
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&mqprio);
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break;
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}
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}
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static void mqprio_destroy(struct Qdisc *sch)
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{
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struct net_device *dev = qdisc_dev(sch);
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struct mqprio_sched *priv = qdisc_priv(sch);
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unsigned int ntx;
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if (priv->qdiscs) {
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for (ntx = 0;
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ntx < dev->num_tx_queues && priv->qdiscs[ntx];
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ntx++)
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qdisc_put(priv->qdiscs[ntx]);
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kfree(priv->qdiscs);
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}
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if (priv->hw_offload && dev->netdev_ops->ndo_setup_tc)
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mqprio_disable_offload(sch);
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else
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netdev_set_num_tc(dev, 0);
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}
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static int mqprio_parse_opt(struct net_device *dev, struct tc_mqprio_qopt *qopt,
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const struct tc_mqprio_caps *caps,
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struct netlink_ext_ack *extack)
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{
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int err;
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/* Limit qopt->hw to maximum supported offload value. Drivers have
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* the option of overriding this later if they don't support the a
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* given offload type.
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*/
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if (qopt->hw > TC_MQPRIO_HW_OFFLOAD_MAX)
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qopt->hw = TC_MQPRIO_HW_OFFLOAD_MAX;
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/* If hardware offload is requested, we will leave 3 options to the
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* device driver:
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* - populate the queue counts itself (and ignore what was requested)
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* - validate the provided queue counts by itself (and apply them)
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* - request queue count validation here (and apply them)
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*/
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err = mqprio_validate_qopt(dev, qopt,
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!qopt->hw || caps->validate_queue_counts,
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false, extack);
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if (err)
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return err;
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/* If ndo_setup_tc is not present then hardware doesn't support offload
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* and we should return an error.
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*/
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if (qopt->hw && !dev->netdev_ops->ndo_setup_tc) {
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NL_SET_ERR_MSG(extack,
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"Device does not support hardware offload");
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return -EINVAL;
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}
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return 0;
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}
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static const struct
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nla_policy mqprio_tc_entry_policy[TCA_MQPRIO_TC_ENTRY_MAX + 1] = {
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[TCA_MQPRIO_TC_ENTRY_INDEX] = NLA_POLICY_MAX(NLA_U32,
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TC_QOPT_MAX_QUEUE),
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[TCA_MQPRIO_TC_ENTRY_FP] = NLA_POLICY_RANGE(NLA_U32,
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TC_FP_EXPRESS,
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TC_FP_PREEMPTIBLE),
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};
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static const struct nla_policy mqprio_policy[TCA_MQPRIO_MAX + 1] = {
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[TCA_MQPRIO_MODE] = { .len = sizeof(u16) },
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[TCA_MQPRIO_SHAPER] = { .len = sizeof(u16) },
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[TCA_MQPRIO_MIN_RATE64] = { .type = NLA_NESTED },
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[TCA_MQPRIO_MAX_RATE64] = { .type = NLA_NESTED },
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[TCA_MQPRIO_TC_ENTRY] = { .type = NLA_NESTED },
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};
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static int mqprio_parse_tc_entry(u32 fp[TC_QOPT_MAX_QUEUE],
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struct nlattr *opt,
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unsigned long *seen_tcs,
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struct netlink_ext_ack *extack)
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{
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struct nlattr *tb[TCA_MQPRIO_TC_ENTRY_MAX + 1];
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int err, tc;
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err = nla_parse_nested(tb, TCA_MQPRIO_TC_ENTRY_MAX, opt,
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mqprio_tc_entry_policy, extack);
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if (err < 0)
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return err;
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if (NL_REQ_ATTR_CHECK(extack, opt, tb, TCA_MQPRIO_TC_ENTRY_INDEX)) {
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NL_SET_ERR_MSG(extack, "TC entry index missing");
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return -EINVAL;
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}
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tc = nla_get_u32(tb[TCA_MQPRIO_TC_ENTRY_INDEX]);
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if (*seen_tcs & BIT(tc)) {
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NL_SET_ERR_MSG_ATTR(extack, tb[TCA_MQPRIO_TC_ENTRY_INDEX],
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"Duplicate tc entry");
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return -EINVAL;
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}
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*seen_tcs |= BIT(tc);
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if (tb[TCA_MQPRIO_TC_ENTRY_FP])
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fp[tc] = nla_get_u32(tb[TCA_MQPRIO_TC_ENTRY_FP]);
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return 0;
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}
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static int mqprio_parse_tc_entries(struct Qdisc *sch, struct nlattr *nlattr_opt,
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int nlattr_opt_len,
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struct netlink_ext_ack *extack)
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{
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struct mqprio_sched *priv = qdisc_priv(sch);
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struct net_device *dev = qdisc_dev(sch);
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bool have_preemption = false;
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unsigned long seen_tcs = 0;
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u32 fp[TC_QOPT_MAX_QUEUE];
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struct nlattr *n;
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int tc, rem;
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int err = 0;
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for (tc = 0; tc < TC_QOPT_MAX_QUEUE; tc++)
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fp[tc] = priv->fp[tc];
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nla_for_each_attr(n, nlattr_opt, nlattr_opt_len, rem) {
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if (nla_type(n) != TCA_MQPRIO_TC_ENTRY)
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continue;
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err = mqprio_parse_tc_entry(fp, n, &seen_tcs, extack);
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if (err)
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goto out;
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}
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for (tc = 0; tc < TC_QOPT_MAX_QUEUE; tc++) {
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priv->fp[tc] = fp[tc];
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if (fp[tc] == TC_FP_PREEMPTIBLE)
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have_preemption = true;
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}
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if (have_preemption && !ethtool_dev_mm_supported(dev)) {
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NL_SET_ERR_MSG(extack, "Device does not support preemption");
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return -EOPNOTSUPP;
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}
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out:
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return err;
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}
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/* Parse the other netlink attributes that represent the payload of
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* TCA_OPTIONS, which are appended right after struct tc_mqprio_qopt.
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*/
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static int mqprio_parse_nlattr(struct Qdisc *sch, struct tc_mqprio_qopt *qopt,
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struct nlattr *opt,
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struct netlink_ext_ack *extack)
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{
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struct nlattr *nlattr_opt = nla_data(opt) + NLA_ALIGN(sizeof(*qopt));
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int nlattr_opt_len = nla_len(opt) - NLA_ALIGN(sizeof(*qopt));
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struct mqprio_sched *priv = qdisc_priv(sch);
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struct nlattr *tb[TCA_MQPRIO_MAX + 1] = {};
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struct nlattr *attr;
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int i, rem, err;
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if (nlattr_opt_len >= nla_attr_size(0)) {
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err = nla_parse_deprecated(tb, TCA_MQPRIO_MAX, nlattr_opt,
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nlattr_opt_len, mqprio_policy,
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NULL);
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if (err < 0)
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return err;
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}
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if (!qopt->hw) {
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NL_SET_ERR_MSG(extack,
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"mqprio TCA_OPTIONS can only contain netlink attributes in hardware mode");
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return -EINVAL;
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}
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if (tb[TCA_MQPRIO_MODE]) {
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priv->flags |= TC_MQPRIO_F_MODE;
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priv->mode = nla_get_u16(tb[TCA_MQPRIO_MODE]);
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}
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if (tb[TCA_MQPRIO_SHAPER]) {
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priv->flags |= TC_MQPRIO_F_SHAPER;
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priv->shaper = nla_get_u16(tb[TCA_MQPRIO_SHAPER]);
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}
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if (tb[TCA_MQPRIO_MIN_RATE64]) {
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if (priv->shaper != TC_MQPRIO_SHAPER_BW_RATE) {
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NL_SET_ERR_MSG_ATTR(extack, tb[TCA_MQPRIO_MIN_RATE64],
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"min_rate accepted only when shaper is in bw_rlimit mode");
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return -EINVAL;
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}
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i = 0;
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nla_for_each_nested(attr, tb[TCA_MQPRIO_MIN_RATE64],
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rem) {
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if (nla_type(attr) != TCA_MQPRIO_MIN_RATE64) {
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NL_SET_ERR_MSG_ATTR(extack, attr,
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"Attribute type expected to be TCA_MQPRIO_MIN_RATE64");
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return -EINVAL;
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}
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if (nla_len(attr) != sizeof(u64)) {
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NL_SET_ERR_MSG_ATTR(extack, attr,
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"Attribute TCA_MQPRIO_MIN_RATE64 expected to have 8 bytes length");
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return -EINVAL;
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}
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if (i >= qopt->num_tc)
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break;
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priv->min_rate[i] = nla_get_u64(attr);
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i++;
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}
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priv->flags |= TC_MQPRIO_F_MIN_RATE;
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}
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if (tb[TCA_MQPRIO_MAX_RATE64]) {
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if (priv->shaper != TC_MQPRIO_SHAPER_BW_RATE) {
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NL_SET_ERR_MSG_ATTR(extack, tb[TCA_MQPRIO_MAX_RATE64],
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"max_rate accepted only when shaper is in bw_rlimit mode");
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return -EINVAL;
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}
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i = 0;
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nla_for_each_nested(attr, tb[TCA_MQPRIO_MAX_RATE64],
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rem) {
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if (nla_type(attr) != TCA_MQPRIO_MAX_RATE64) {
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NL_SET_ERR_MSG_ATTR(extack, attr,
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"Attribute type expected to be TCA_MQPRIO_MAX_RATE64");
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return -EINVAL;
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}
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if (nla_len(attr) != sizeof(u64)) {
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NL_SET_ERR_MSG_ATTR(extack, attr,
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"Attribute TCA_MQPRIO_MAX_RATE64 expected to have 8 bytes length");
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return -EINVAL;
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}
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if (i >= qopt->num_tc)
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break;
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priv->max_rate[i] = nla_get_u64(attr);
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i++;
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}
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priv->flags |= TC_MQPRIO_F_MAX_RATE;
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}
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if (tb[TCA_MQPRIO_TC_ENTRY]) {
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err = mqprio_parse_tc_entries(sch, nlattr_opt, nlattr_opt_len,
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extack);
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if (err)
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return err;
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}
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return 0;
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}
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static int mqprio_init(struct Qdisc *sch, struct nlattr *opt,
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struct netlink_ext_ack *extack)
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{
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struct net_device *dev = qdisc_dev(sch);
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struct mqprio_sched *priv = qdisc_priv(sch);
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struct netdev_queue *dev_queue;
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struct Qdisc *qdisc;
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int i, err = -EOPNOTSUPP;
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struct tc_mqprio_qopt *qopt = NULL;
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struct tc_mqprio_caps caps;
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int len, tc;
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BUILD_BUG_ON(TC_MAX_QUEUE != TC_QOPT_MAX_QUEUE);
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BUILD_BUG_ON(TC_BITMASK != TC_QOPT_BITMASK);
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if (sch->parent != TC_H_ROOT)
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return -EOPNOTSUPP;
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if (!netif_is_multiqueue(dev))
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return -EOPNOTSUPP;
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/* make certain can allocate enough classids to handle queues */
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if (dev->num_tx_queues >= TC_H_MIN_PRIORITY)
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return -ENOMEM;
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if (!opt || nla_len(opt) < sizeof(*qopt))
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return -EINVAL;
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for (tc = 0; tc < TC_QOPT_MAX_QUEUE; tc++)
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priv->fp[tc] = TC_FP_EXPRESS;
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qdisc_offload_query_caps(dev, TC_SETUP_QDISC_MQPRIO,
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&caps, sizeof(caps));
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qopt = nla_data(opt);
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if (mqprio_parse_opt(dev, qopt, &caps, extack))
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return -EINVAL;
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len = nla_len(opt) - NLA_ALIGN(sizeof(*qopt));
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if (len > 0) {
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err = mqprio_parse_nlattr(sch, qopt, opt, extack);
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if (err)
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return err;
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}
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/* pre-allocate qdisc, attachment can't fail */
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priv->qdiscs = kcalloc(dev->num_tx_queues, sizeof(priv->qdiscs[0]),
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GFP_KERNEL);
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if (!priv->qdiscs)
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return -ENOMEM;
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for (i = 0; i < dev->num_tx_queues; i++) {
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dev_queue = netdev_get_tx_queue(dev, i);
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qdisc = qdisc_create_dflt(dev_queue,
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get_default_qdisc_ops(dev, i),
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TC_H_MAKE(TC_H_MAJ(sch->handle),
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TC_H_MIN(i + 1)), extack);
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if (!qdisc)
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return -ENOMEM;
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priv->qdiscs[i] = qdisc;
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qdisc->flags |= TCQ_F_ONETXQUEUE | TCQ_F_NOPARENT;
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}
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/* If the mqprio options indicate that hardware should own
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* the queue mapping then run ndo_setup_tc otherwise use the
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* supplied and verified mapping
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*/
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if (qopt->hw) {
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err = mqprio_enable_offload(sch, qopt, extack);
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if (err)
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return err;
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} else {
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netdev_set_num_tc(dev, qopt->num_tc);
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for (i = 0; i < qopt->num_tc; i++)
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netdev_set_tc_queue(dev, i,
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qopt->count[i], qopt->offset[i]);
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}
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/* Always use supplied priority mappings */
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for (i = 0; i < TC_BITMASK + 1; i++)
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netdev_set_prio_tc_map(dev, i, qopt->prio_tc_map[i]);
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sch->flags |= TCQ_F_MQROOT;
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return 0;
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}
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static void mqprio_attach(struct Qdisc *sch)
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{
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struct net_device *dev = qdisc_dev(sch);
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struct mqprio_sched *priv = qdisc_priv(sch);
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struct Qdisc *qdisc, *old;
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unsigned int ntx;
|
|
|
|
/* Attach underlying qdisc */
|
|
for (ntx = 0; ntx < dev->num_tx_queues; ntx++) {
|
|
qdisc = priv->qdiscs[ntx];
|
|
old = dev_graft_qdisc(qdisc->dev_queue, qdisc);
|
|
if (old)
|
|
qdisc_put(old);
|
|
if (ntx < dev->real_num_tx_queues)
|
|
qdisc_hash_add(qdisc, false);
|
|
}
|
|
kfree(priv->qdiscs);
|
|
priv->qdiscs = NULL;
|
|
}
|
|
|
|
static struct netdev_queue *mqprio_queue_get(struct Qdisc *sch,
|
|
unsigned long cl)
|
|
{
|
|
struct net_device *dev = qdisc_dev(sch);
|
|
unsigned long ntx = cl - 1;
|
|
|
|
if (ntx >= dev->num_tx_queues)
|
|
return NULL;
|
|
return netdev_get_tx_queue(dev, ntx);
|
|
}
|
|
|
|
static int mqprio_graft(struct Qdisc *sch, unsigned long cl, struct Qdisc *new,
|
|
struct Qdisc **old, struct netlink_ext_ack *extack)
|
|
{
|
|
struct net_device *dev = qdisc_dev(sch);
|
|
struct netdev_queue *dev_queue = mqprio_queue_get(sch, cl);
|
|
|
|
if (!dev_queue)
|
|
return -EINVAL;
|
|
|
|
if (dev->flags & IFF_UP)
|
|
dev_deactivate(dev);
|
|
|
|
*old = dev_graft_qdisc(dev_queue, new);
|
|
|
|
if (new)
|
|
new->flags |= TCQ_F_ONETXQUEUE | TCQ_F_NOPARENT;
|
|
|
|
if (dev->flags & IFF_UP)
|
|
dev_activate(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dump_rates(struct mqprio_sched *priv,
|
|
struct tc_mqprio_qopt *opt, struct sk_buff *skb)
|
|
{
|
|
struct nlattr *nest;
|
|
int i;
|
|
|
|
if (priv->flags & TC_MQPRIO_F_MIN_RATE) {
|
|
nest = nla_nest_start_noflag(skb, TCA_MQPRIO_MIN_RATE64);
|
|
if (!nest)
|
|
goto nla_put_failure;
|
|
|
|
for (i = 0; i < opt->num_tc; i++) {
|
|
if (nla_put(skb, TCA_MQPRIO_MIN_RATE64,
|
|
sizeof(priv->min_rate[i]),
|
|
&priv->min_rate[i]))
|
|
goto nla_put_failure;
|
|
}
|
|
nla_nest_end(skb, nest);
|
|
}
|
|
|
|
if (priv->flags & TC_MQPRIO_F_MAX_RATE) {
|
|
nest = nla_nest_start_noflag(skb, TCA_MQPRIO_MAX_RATE64);
|
|
if (!nest)
|
|
goto nla_put_failure;
|
|
|
|
for (i = 0; i < opt->num_tc; i++) {
|
|
if (nla_put(skb, TCA_MQPRIO_MAX_RATE64,
|
|
sizeof(priv->max_rate[i]),
|
|
&priv->max_rate[i]))
|
|
goto nla_put_failure;
|
|
}
|
|
nla_nest_end(skb, nest);
|
|
}
|
|
return 0;
|
|
|
|
nla_put_failure:
|
|
nla_nest_cancel(skb, nest);
|
|
return -1;
|
|
}
|
|
|
|
static int mqprio_dump_tc_entries(struct mqprio_sched *priv,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct nlattr *n;
|
|
int tc;
|
|
|
|
for (tc = 0; tc < TC_QOPT_MAX_QUEUE; tc++) {
|
|
n = nla_nest_start(skb, TCA_MQPRIO_TC_ENTRY);
|
|
if (!n)
|
|
return -EMSGSIZE;
|
|
|
|
if (nla_put_u32(skb, TCA_MQPRIO_TC_ENTRY_INDEX, tc))
|
|
goto nla_put_failure;
|
|
|
|
if (nla_put_u32(skb, TCA_MQPRIO_TC_ENTRY_FP, priv->fp[tc]))
|
|
goto nla_put_failure;
|
|
|
|
nla_nest_end(skb, n);
|
|
}
|
|
|
|
return 0;
|
|
|
|
nla_put_failure:
|
|
nla_nest_cancel(skb, n);
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
static int mqprio_dump(struct Qdisc *sch, struct sk_buff *skb)
|
|
{
|
|
struct net_device *dev = qdisc_dev(sch);
|
|
struct mqprio_sched *priv = qdisc_priv(sch);
|
|
struct nlattr *nla = (struct nlattr *)skb_tail_pointer(skb);
|
|
struct tc_mqprio_qopt opt = { 0 };
|
|
struct Qdisc *qdisc;
|
|
unsigned int ntx;
|
|
|
|
sch->q.qlen = 0;
|
|
gnet_stats_basic_sync_init(&sch->bstats);
|
|
memset(&sch->qstats, 0, sizeof(sch->qstats));
|
|
|
|
/* MQ supports lockless qdiscs. However, statistics accounting needs
|
|
* to account for all, none, or a mix of locked and unlocked child
|
|
* qdiscs. Percpu stats are added to counters in-band and locking
|
|
* qdisc totals are added at end.
|
|
*/
|
|
for (ntx = 0; ntx < dev->num_tx_queues; ntx++) {
|
|
qdisc = rtnl_dereference(netdev_get_tx_queue(dev, ntx)->qdisc_sleeping);
|
|
spin_lock_bh(qdisc_lock(qdisc));
|
|
|
|
gnet_stats_add_basic(&sch->bstats, qdisc->cpu_bstats,
|
|
&qdisc->bstats, false);
|
|
gnet_stats_add_queue(&sch->qstats, qdisc->cpu_qstats,
|
|
&qdisc->qstats);
|
|
sch->q.qlen += qdisc_qlen(qdisc);
|
|
|
|
spin_unlock_bh(qdisc_lock(qdisc));
|
|
}
|
|
|
|
mqprio_qopt_reconstruct(dev, &opt);
|
|
opt.hw = priv->hw_offload;
|
|
|
|
if (nla_put(skb, TCA_OPTIONS, sizeof(opt), &opt))
|
|
goto nla_put_failure;
|
|
|
|
if ((priv->flags & TC_MQPRIO_F_MODE) &&
|
|
nla_put_u16(skb, TCA_MQPRIO_MODE, priv->mode))
|
|
goto nla_put_failure;
|
|
|
|
if ((priv->flags & TC_MQPRIO_F_SHAPER) &&
|
|
nla_put_u16(skb, TCA_MQPRIO_SHAPER, priv->shaper))
|
|
goto nla_put_failure;
|
|
|
|
if ((priv->flags & TC_MQPRIO_F_MIN_RATE ||
|
|
priv->flags & TC_MQPRIO_F_MAX_RATE) &&
|
|
(dump_rates(priv, &opt, skb) != 0))
|
|
goto nla_put_failure;
|
|
|
|
if (mqprio_dump_tc_entries(priv, skb))
|
|
goto nla_put_failure;
|
|
|
|
return nla_nest_end(skb, nla);
|
|
nla_put_failure:
|
|
nlmsg_trim(skb, nla);
|
|
return -1;
|
|
}
|
|
|
|
static struct Qdisc *mqprio_leaf(struct Qdisc *sch, unsigned long cl)
|
|
{
|
|
struct netdev_queue *dev_queue = mqprio_queue_get(sch, cl);
|
|
|
|
if (!dev_queue)
|
|
return NULL;
|
|
|
|
return rtnl_dereference(dev_queue->qdisc_sleeping);
|
|
}
|
|
|
|
static unsigned long mqprio_find(struct Qdisc *sch, u32 classid)
|
|
{
|
|
struct net_device *dev = qdisc_dev(sch);
|
|
unsigned int ntx = TC_H_MIN(classid);
|
|
|
|
/* There are essentially two regions here that have valid classid
|
|
* values. The first region will have a classid value of 1 through
|
|
* num_tx_queues. All of these are backed by actual Qdiscs.
|
|
*/
|
|
if (ntx < TC_H_MIN_PRIORITY)
|
|
return (ntx <= dev->num_tx_queues) ? ntx : 0;
|
|
|
|
/* The second region represents the hardware traffic classes. These
|
|
* are represented by classid values of TC_H_MIN_PRIORITY through
|
|
* TC_H_MIN_PRIORITY + netdev_get_num_tc - 1
|
|
*/
|
|
return ((ntx - TC_H_MIN_PRIORITY) < netdev_get_num_tc(dev)) ? ntx : 0;
|
|
}
|
|
|
|
static int mqprio_dump_class(struct Qdisc *sch, unsigned long cl,
|
|
struct sk_buff *skb, struct tcmsg *tcm)
|
|
{
|
|
if (cl < TC_H_MIN_PRIORITY) {
|
|
struct netdev_queue *dev_queue = mqprio_queue_get(sch, cl);
|
|
struct net_device *dev = qdisc_dev(sch);
|
|
int tc = netdev_txq_to_tc(dev, cl - 1);
|
|
|
|
tcm->tcm_parent = (tc < 0) ? 0 :
|
|
TC_H_MAKE(TC_H_MAJ(sch->handle),
|
|
TC_H_MIN(tc + TC_H_MIN_PRIORITY));
|
|
tcm->tcm_info = rtnl_dereference(dev_queue->qdisc_sleeping)->handle;
|
|
} else {
|
|
tcm->tcm_parent = TC_H_ROOT;
|
|
tcm->tcm_info = 0;
|
|
}
|
|
tcm->tcm_handle |= TC_H_MIN(cl);
|
|
return 0;
|
|
}
|
|
|
|
static int mqprio_dump_class_stats(struct Qdisc *sch, unsigned long cl,
|
|
struct gnet_dump *d)
|
|
__releases(d->lock)
|
|
__acquires(d->lock)
|
|
{
|
|
if (cl >= TC_H_MIN_PRIORITY) {
|
|
int i;
|
|
__u32 qlen;
|
|
struct gnet_stats_queue qstats = {0};
|
|
struct gnet_stats_basic_sync bstats;
|
|
struct net_device *dev = qdisc_dev(sch);
|
|
struct netdev_tc_txq tc = dev->tc_to_txq[cl & TC_BITMASK];
|
|
|
|
gnet_stats_basic_sync_init(&bstats);
|
|
/* Drop lock here it will be reclaimed before touching
|
|
* statistics this is required because the d->lock we
|
|
* hold here is the look on dev_queue->qdisc_sleeping
|
|
* also acquired below.
|
|
*/
|
|
if (d->lock)
|
|
spin_unlock_bh(d->lock);
|
|
|
|
for (i = tc.offset; i < tc.offset + tc.count; i++) {
|
|
struct netdev_queue *q = netdev_get_tx_queue(dev, i);
|
|
struct Qdisc *qdisc = rtnl_dereference(q->qdisc);
|
|
|
|
spin_lock_bh(qdisc_lock(qdisc));
|
|
|
|
gnet_stats_add_basic(&bstats, qdisc->cpu_bstats,
|
|
&qdisc->bstats, false);
|
|
gnet_stats_add_queue(&qstats, qdisc->cpu_qstats,
|
|
&qdisc->qstats);
|
|
sch->q.qlen += qdisc_qlen(qdisc);
|
|
|
|
spin_unlock_bh(qdisc_lock(qdisc));
|
|
}
|
|
qlen = qdisc_qlen(sch) + qstats.qlen;
|
|
|
|
/* Reclaim root sleeping lock before completing stats */
|
|
if (d->lock)
|
|
spin_lock_bh(d->lock);
|
|
if (gnet_stats_copy_basic(d, NULL, &bstats, false) < 0 ||
|
|
gnet_stats_copy_queue(d, NULL, &qstats, qlen) < 0)
|
|
return -1;
|
|
} else {
|
|
struct netdev_queue *dev_queue = mqprio_queue_get(sch, cl);
|
|
|
|
sch = rtnl_dereference(dev_queue->qdisc_sleeping);
|
|
if (gnet_stats_copy_basic(d, sch->cpu_bstats,
|
|
&sch->bstats, true) < 0 ||
|
|
qdisc_qstats_copy(d, sch) < 0)
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void mqprio_walk(struct Qdisc *sch, struct qdisc_walker *arg)
|
|
{
|
|
struct net_device *dev = qdisc_dev(sch);
|
|
unsigned long ntx;
|
|
|
|
if (arg->stop)
|
|
return;
|
|
|
|
/* Walk hierarchy with a virtual class per tc */
|
|
arg->count = arg->skip;
|
|
for (ntx = arg->skip; ntx < netdev_get_num_tc(dev); ntx++) {
|
|
if (!tc_qdisc_stats_dump(sch, ntx + TC_H_MIN_PRIORITY, arg))
|
|
return;
|
|
}
|
|
|
|
/* Pad the values and skip over unused traffic classes */
|
|
if (ntx < TC_MAX_QUEUE) {
|
|
arg->count = TC_MAX_QUEUE;
|
|
ntx = TC_MAX_QUEUE;
|
|
}
|
|
|
|
/* Reset offset, sort out remaining per-queue qdiscs */
|
|
for (ntx -= TC_MAX_QUEUE; ntx < dev->num_tx_queues; ntx++) {
|
|
if (arg->fn(sch, ntx + 1, arg) < 0) {
|
|
arg->stop = 1;
|
|
return;
|
|
}
|
|
arg->count++;
|
|
}
|
|
}
|
|
|
|
static struct netdev_queue *mqprio_select_queue(struct Qdisc *sch,
|
|
struct tcmsg *tcm)
|
|
{
|
|
return mqprio_queue_get(sch, TC_H_MIN(tcm->tcm_parent));
|
|
}
|
|
|
|
static const struct Qdisc_class_ops mqprio_class_ops = {
|
|
.graft = mqprio_graft,
|
|
.leaf = mqprio_leaf,
|
|
.find = mqprio_find,
|
|
.walk = mqprio_walk,
|
|
.dump = mqprio_dump_class,
|
|
.dump_stats = mqprio_dump_class_stats,
|
|
.select_queue = mqprio_select_queue,
|
|
};
|
|
|
|
static struct Qdisc_ops mqprio_qdisc_ops __read_mostly = {
|
|
.cl_ops = &mqprio_class_ops,
|
|
.id = "mqprio",
|
|
.priv_size = sizeof(struct mqprio_sched),
|
|
.init = mqprio_init,
|
|
.destroy = mqprio_destroy,
|
|
.attach = mqprio_attach,
|
|
.change_real_num_tx = mq_change_real_num_tx,
|
|
.dump = mqprio_dump,
|
|
.owner = THIS_MODULE,
|
|
};
|
|
MODULE_ALIAS_NET_SCH("mqprio");
|
|
|
|
static int __init mqprio_module_init(void)
|
|
{
|
|
return register_qdisc(&mqprio_qdisc_ops);
|
|
}
|
|
|
|
static void __exit mqprio_module_exit(void)
|
|
{
|
|
unregister_qdisc(&mqprio_qdisc_ops);
|
|
}
|
|
|
|
module_init(mqprio_module_init);
|
|
module_exit(mqprio_module_exit);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("Classful multiqueue prio qdisc");
|