Release 4.7 net/sched/sch_api.c
/*
* net/sched/sch_api.c Packet scheduler API.
*
* 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 the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
*
* Fixes:
*
* Rani Assaf <rani@magic.metawire.com> :980802: JIFFIES and CPU clock sources are repaired.
* Eduardo J. Blanco <ejbs@netlabs.com.uy> :990222: kmod support
* Jamal Hadi Salim <hadi@nortelnetworks.com>: 990601: ingress support
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/skbuff.h>
#include <linux/init.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/kmod.h>
#include <linux/list.h>
#include <linux/hrtimer.h>
#include <linux/lockdep.h>
#include <linux/slab.h>
#include <net/net_namespace.h>
#include <net/sock.h>
#include <net/netlink.h>
#include <net/pkt_sched.h>
static int qdisc_notify(struct net *net, struct sk_buff *oskb,
struct nlmsghdr *n, u32 clid,
struct Qdisc *old, struct Qdisc *new);
static int tclass_notify(struct net *net, struct sk_buff *oskb,
struct nlmsghdr *n, struct Qdisc *q,
unsigned long cl, int event);
/*
Short review.
-------------
This file consists of two interrelated parts:
1. queueing disciplines manager frontend.
2. traffic classes manager frontend.
Generally, queueing discipline ("qdisc") is a black box,
which is able to enqueue packets and to dequeue them (when
device is ready to send something) in order and at times
determined by algorithm hidden in it.
qdisc's are divided to two categories:
- "queues", which have no internal structure visible from outside.
- "schedulers", which split all the packets to "traffic classes",
using "packet classifiers" (look at cls_api.c)
In turn, classes may have child qdiscs (as rule, queues)
attached to them etc. etc. etc.
The goal of the routines in this file is to translate
information supplied by user in the form of handles
to more intelligible for kernel form, to make some sanity
checks and part of work, which is common to all qdiscs
and to provide rtnetlink notifications.
All real intelligent work is done inside qdisc modules.
Every discipline has two major routines: enqueue and dequeue.
---dequeue
dequeue usually returns a skb to send. It is allowed to return NULL,
but it does not mean that queue is empty, it just means that
discipline does not want to send anything this time.
Queue is really empty if q->q.qlen == 0.
For complicated disciplines with multiple queues q->q is not
real packet queue, but however q->q.qlen must be valid.
---enqueue
enqueue returns 0, if packet was enqueued successfully.
If packet (this one or another one) was dropped, it returns
not zero error code.
NET_XMIT_DROP - this packet dropped
Expected action: do not backoff, but wait until queue will clear.
NET_XMIT_CN - probably this packet enqueued, but another one dropped.
Expected action: backoff or ignore
NET_XMIT_POLICED - dropped by police.
Expected action: backoff or error to real-time apps.
Auxiliary routines:
---peek
like dequeue but without removing a packet from the queue
---reset
returns qdisc to initial state: purge all buffers, clear all
timers, counters (except for statistics) etc.
---init
initializes newly created qdisc.
---destroy
destroys resources allocated by init and during lifetime of qdisc.
---change
changes qdisc parameters.
*/
/* Protects list of registered TC modules. It is pure SMP lock. */
static DEFINE_RWLOCK(qdisc_mod_lock);
/************************************************
* Queueing disciplines manipulation. *
************************************************/
/* The list of all installed queueing disciplines. */
static struct Qdisc_ops *qdisc_base;
/* Register/unregister queueing discipline */
int register_qdisc(struct Qdisc_ops *qops)
{
struct Qdisc_ops *q, **qp;
int rc = -EEXIST;
write_lock(&qdisc_mod_lock);
for (qp = &qdisc_base; (q = *qp) != NULL; qp = &q->next)
if (!strcmp(qops->id, q->id))
goto out;
if (qops->enqueue == NULL)
qops->enqueue = noop_qdisc_ops.enqueue;
if (qops->peek == NULL) {
if (qops->dequeue == NULL)
qops->peek = noop_qdisc_ops.peek;
else
goto out_einval;
}
if (qops->dequeue == NULL)
qops->dequeue = noop_qdisc_ops.dequeue;
if (qops->cl_ops) {
const struct Qdisc_class_ops *cops = qops->cl_ops;
if (!(cops->get && cops->put && cops->walk && cops->leaf))
goto out_einval;
if (cops->tcf_chain && !(cops->bind_tcf && cops->unbind_tcf))
goto out_einval;
}
qops->next = NULL;
*qp = qops;
rc = 0;
out:
write_unlock(&qdisc_mod_lock);
return rc;
out_einval:
rc = -EINVAL;
goto out;
}
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| Total | 231 | 100.00% | 6 | 100.00% |
EXPORT_SYMBOL(register_qdisc);
int unregister_qdisc(struct Qdisc_ops *qops)
{
struct Qdisc_ops *q, **qp;
int err = -ENOENT;
write_lock(&qdisc_mod_lock);
for (qp = &qdisc_base; (q = *qp) != NULL; qp = &q->next)
if (q == qops)
break;
if (q) {
*qp = q->next;
q->next = NULL;
err = 0;
}
write_unlock(&qdisc_mod_lock);
return err;
}
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| Total | 93 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL(unregister_qdisc);
/* Get default qdisc if not otherwise specified */
void qdisc_get_default(char *name, size_t len)
{
read_lock(&qdisc_mod_lock);
strlcpy(name, default_qdisc_ops->id, len);
read_unlock(&qdisc_mod_lock);
}
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| Total | 35 | 100.00% | 1 | 100.00% |
static struct Qdisc_ops *qdisc_lookup_default(const char *name)
{
struct Qdisc_ops *q = NULL;
for (q = qdisc_base; q; q = q->next) {
if (!strcmp(name, q->id)) {
if (!try_module_get(q->owner))
q = NULL;
break;
}
}
return q;
}
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| Total | 68 | 100.00% | 1 | 100.00% |
/* Set new default qdisc to use */
int qdisc_set_default(const char *name)
{
const struct Qdisc_ops *ops;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
write_lock(&qdisc_mod_lock);
ops = qdisc_lookup_default(name);
if (!ops) {
/* Not found, drop lock and try to load module */
write_unlock(&qdisc_mod_lock);
request_module("sch_%s", name);
write_lock(&qdisc_mod_lock);
ops = qdisc_lookup_default(name);
}
if (ops) {
/* Set new default */
module_put(default_qdisc_ops->owner);
default_qdisc_ops = ops;
}
write_unlock(&qdisc_mod_lock);
return ops ? 0 : -ENOENT;
}
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| Total | 107 | 100.00% | 1 | 100.00% |
/* We know handle. Find qdisc among all qdisc's attached to device
* (root qdisc, all its children, children of children etc.)
* Note: caller either uses rtnl or rcu_read_lock()
*/
static struct Qdisc *qdisc_match_from_root(struct Qdisc *root, u32 handle)
{
struct Qdisc *q;
if (!(root->flags & TCQ_F_BUILTIN) &&
root->handle == handle)
return root;
list_for_each_entry_rcu(q, &root->list, list) {
if (q->handle == handle)
return q;
}
return NULL;
}
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hannes eder | hannes eder | 1 | 1.54% | 1 | 33.33% |
| Total | 65 | 100.00% | 3 | 100.00% |
void qdisc_list_add(struct Qdisc *q)
{
if ((q->parent != TC_H_ROOT) && !(q->flags & TCQ_F_INGRESS)) {
struct Qdisc *root = qdisc_dev(q)->qdisc;
WARN_ON_ONCE(root == &noop_qdisc);
ASSERT_RTNL();
list_add_tail_rcu(&q->list, &root->list);
}
}
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eric dumazet | eric dumazet | 46 | 68.66% | 3 | 60.00% |
jarek poplawski | jarek poplawski | 20 | 29.85% | 1 | 20.00% |
patrick mchardy | patrick mchardy | 1 | 1.49% | 1 | 20.00% |
| Total | 67 | 100.00% | 5 | 100.00% |
EXPORT_SYMBOL(qdisc_list_add);
void qdisc_list_del(struct Qdisc *q)
{
if ((q->parent != TC_H_ROOT) && !(q->flags & TCQ_F_INGRESS)) {
ASSERT_RTNL();
list_del_rcu(&q->list);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
jarek poplawski | jarek poplawski | 36 | 85.71% | 1 | 50.00% |
eric dumazet | eric dumazet | 6 | 14.29% | 1 | 50.00% |
| Total | 42 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL(qdisc_list_del);
struct Qdisc *qdisc_lookup(struct net_device *dev, u32 handle)
{
struct Qdisc *q;
q = qdisc_match_from_root(dev->qdisc, handle);
if (q)
goto out;
if (dev_ingress_queue(dev))
q = qdisc_match_from_root(
dev_ingress_queue(dev)->qdisc_sleeping,
handle);
out:
return q;
}
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| Person | Tokens | Prop | Commits | CommitProp |
david s. miller | david s. miller | 16 | 25.00% | 2 | 22.22% |
jarek poplawski | jarek poplawski | 15 | 23.44% | 2 | 22.22% |
pre-git | pre-git | 15 | 23.44% | 1 | 11.11% |
eric dumazet | eric dumazet | 10 | 15.62% | 1 | 11.11% |
patrick mchardy | patrick mchardy | 8 | 12.50% | 3 | 33.33% |
| Total | 64 | 100.00% | 9 | 100.00% |
static struct Qdisc *qdisc_leaf(struct Qdisc *p, u32 classid)
{
unsigned long cl;
struct Qdisc *leaf;
const struct Qdisc_class_ops *cops = p->ops->cl_ops;
if (cops == NULL)
return NULL;
cl = cops->get(p, classid);
if (cl == 0)
return NULL;
leaf = cops->leaf(p, cl);
cops->put(p, cl);
return leaf;
}
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pre-git | pre-git | 87 | 97.75% | 2 | 50.00% |
eric dumazet | eric dumazet | 1 | 1.12% | 1 | 25.00% |
adrian bunk | adrian bunk | 1 | 1.12% | 1 | 25.00% |
| Total | 89 | 100.00% | 4 | 100.00% |
/* Find queueing discipline by name */
static struct Qdisc_ops *qdisc_lookup_ops(struct nlattr *kind)
{
struct Qdisc_ops *q = NULL;
if (kind) {
read_lock(&qdisc_mod_lock);
for (q = qdisc_base; q; q = q->next) {
if (nla_strcmp(kind, q->id) == 0) {
if (!try_module_get(q->owner))
q = NULL;
break;
}
}
read_unlock(&qdisc_mod_lock);
}
return q;
}
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pre-git | pre-git | 68 | 78.16% | 2 | 40.00% |
patrick mchardy | patrick mchardy | 18 | 20.69% | 2 | 40.00% |
adrian bunk | adrian bunk | 1 | 1.15% | 1 | 20.00% |
| Total | 87 | 100.00% | 5 | 100.00% |
/* The linklayer setting were not transferred from iproute2, in older
* versions, and the rate tables lookup systems have been dropped in
* the kernel. To keep backward compatible with older iproute2 tc
* utils, we detect the linklayer setting by detecting if the rate
* table were modified.
*
* For linklayer ATM table entries, the rate table will be aligned to
* 48 bytes, thus some table entries will contain the same value. The
* mpu (min packet unit) is also encoded into the old rate table, thus
* starting from the mpu, we find low and high table entries for
* mapping this cell. If these entries contain the same value, when
* the rate tables have been modified for linklayer ATM.
*
* This is done by rounding mpu to the nearest 48 bytes cell/entry,
* and then roundup to the next cell, calc the table entry one below,
* and compare.
*/
static __u8 __detect_linklayer(struct tc_ratespec *r, __u32 *rtab)
{
int low = roundup(r->mpu, 48);
int high = roundup(low+1, 48);
int cell_low = low >> r->cell_log;
int cell_high = (high >> r->cell_log) - 1;
/* rtab is too inaccurate at rates > 100Mbit/s */
if ((r->rate > (100000000/8)) || (rtab[0] == 0)) {
pr_debug("TC linklayer: Giving up ATM detection\n");
return TC_LINKLAYER_ETHERNET;
}
if ((cell_high > cell_low) && (cell_high < 256)
&& (rtab[cell_low] == rtab[cell_high])) {
pr_debug("TC linklayer: Detected ATM, low(%d)=high(%d)=%u\n",
cell_low, cell_high, rtab[cell_high]);
return TC_LINKLAYER_ATM;
}
return TC_LINKLAYER_ETHERNET;
}
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| Total | 143 | 100.00% | 1 | 100.00% |
static struct qdisc_rate_table *qdisc_rtab_list;
struct qdisc_rate_table *qdisc_get_rtab(struct tc_ratespec *r, struct nlattr *tab)
{
struct qdisc_rate_table *rtab;
if (tab == NULL || r->rate == 0 || r->cell_log == 0 ||
nla_len(tab) != TC_RTAB_SIZE)
return NULL;
for (rtab = qdisc_rtab_list; rtab; rtab = rtab->next) {
if (!memcmp(&rtab->rate, r, sizeof(struct tc_ratespec)) &&
!memcmp(&rtab->data, nla_data(tab), 1024)) {
rtab->refcnt++;
return rtab;
}
}
rtab = kmalloc(sizeof(*rtab), GFP_KERNEL);
if (rtab) {
rtab->rate = *r;
rtab->refcnt = 1;
memcpy(rtab->data, nla_data(tab), 1024);
if (r->linklayer == TC_LINKLAYER_UNAWARE)
r->linklayer = __detect_linklayer(r, rtab->data);
rtab->next = qdisc_rtab_list;
qdisc_rtab_list = rtab;
}
return rtab;
}
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pre-git | pre-git | 123 | 64.40% | 1 | 25.00% |
eric dumazet | eric dumazet | 45 | 23.56% | 1 | 25.00% |
jesper dangaard brouer | jesper dangaard brouer | 21 | 10.99% | 1 | 25.00% |
patrick mchardy | patrick mchardy | 2 | 1.05% | 1 | 25.00% |
| Total | 191 | 100.00% | 4 | 100.00% |
EXPORT_SYMBOL(qdisc_get_rtab);
void qdisc_put_rtab(struct qdisc_rate_table *tab)
{
struct qdisc_rate_table *rtab, **rtabp;
if (!tab || --tab->refcnt)
return;
for (rtabp = &qdisc_rtab_list;
(rtab = *rtabp) != NULL;
rtabp = &rtab->next) {
if (rtab == tab) {
*rtabp = rtab->next;
kfree(rtab);
return;
}
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pre-git | pre-git | 76 | 100.00% | 1 | 100.00% |
| Total | 76 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL(qdisc_put_rtab);
static LIST_HEAD(qdisc_stab_list);
static DEFINE_SPINLOCK(qdisc_stab_lock);
static const struct nla_policy stab_policy[TCA_STAB_MAX + 1] = {
[TCA_STAB_BASE] = { .len = sizeof(struct tc_sizespec) },
[TCA_STAB_DATA] = { .type = NLA_BINARY },
};
static struct qdisc_size_table *qdisc_get_stab(struct nlattr *opt)
{
struct nlattr *tb[TCA_STAB_MAX + 1];
struct qdisc_size_table *stab;
struct tc_sizespec *s;
unsigned int tsize = 0;
u16 *tab = NULL;
int err;
err = nla_parse_nested(tb, TCA_STAB_MAX, opt, stab_policy);
if (err < 0)
return ERR_PTR(err);
if (!tb[TCA_STAB_BASE])
return ERR_PTR(-EINVAL);
s = nla_data(tb[TCA_STAB_BASE]);
if (s->tsize > 0) {
if (!tb[TCA_STAB_DATA])
return ERR_PTR(-EINVAL);
tab = nla_data(tb[TCA_STAB_DATA]);
tsize = nla_len(tb[TCA_STAB_DATA]) / sizeof(u16);
}
if (tsize != s->tsize || (!tab && tsize > 0))
return ERR_PTR(-EINVAL);
spin_lock(&qdisc_stab_lock);
list_for_each_entry(stab, &qdisc_stab_list, list) {
if (memcmp(&stab->szopts, s, sizeof(*s)))
continue;
if (tsize > 0 && memcmp(stab->data, tab, tsize * sizeof(u16)))
continue;
stab->refcnt++;
spin_unlock(&qdisc_stab_lock);
return stab;
}
spin_unlock(&qdisc_stab_lock);
stab = kmalloc(sizeof(*stab) + tsize * sizeof(u16), GFP_KERNEL);
if (!stab)
return ERR_PTR(-ENOMEM);
stab->refcnt = 1;
stab->szopts = *s;
if (tsize > 0)
memcpy(stab->data, tab, tsize * sizeof(u16));
spin_lock(&qdisc_stab_lock);
list_add_tail(&stab->list, &qdisc_stab_list);
spin_unlock(&qdisc_stab_lock);
return stab;
}
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| Person | Tokens | Prop | Commits | CommitProp |
jussi kivilinna | jussi kivilinna | 338 | 98.54% | 1 | 50.00% |
david s. miller | david s. miller | 5 | 1.46% | 1 | 50.00% |
| Total | 343 | 100.00% | 2 | 100.00% |
static void stab_kfree_rcu(struct rcu_head *head)
{
kfree(container_of(head, struct qdisc_size_table, rcu));
}
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eric dumazet | eric dumazet | 24 | 100.00% | 1 | 100.00% |
| Total | 24 | 100.00% | 1 | 100.00% |
void qdisc_put_stab(struct qdisc_size_table *tab)
{
if (!tab)
return;
spin_lock(&qdisc_stab_lock);
if (--tab->refcnt == 0) {
list_del(&tab->list);
call_rcu_bh(&tab->rcu, stab_kfree_rcu);
}
spin_unlock(&qdisc_stab_lock);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
jussi kivilinna | jussi kivilinna | 49 | 85.96% | 1 | 33.33% |
eric dumazet | eric dumazet | 6 | 10.53% | 1 | 33.33% |
david s. miller | david s. miller | 2 | 3.51% | 1 | 33.33% |
| Total | 57 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL(qdisc_put_stab);
static int qdisc_dump_stab(struct sk_buff *skb, struct qdisc_size_table *stab)
{
struct nlattr *nest;
nest = nla_nest_start(skb, TCA_STAB);
if (nest == NULL)
goto nla_put_failure;
if (nla_put(skb, TCA_STAB_BASE, sizeof(stab->szopts), &stab->szopts))
goto nla_put_failure;
nla_nest_end(skb, nest);
return skb->len;
nla_put_failure:
return -1;
}
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jussi kivilinna | jussi kivilinna | 65 | 80.25% | 1 | 33.33% |
patrick mchardy | patrick mchardy | 9 | 11.11% | 1 | 33.33% |
david s. miller | david s. miller | 7 | 8.64% | 1 | 33.33% |
| Total | 81 | 100.00% | 3 | 100.00% |
void __qdisc_calculate_pkt_len(struct sk_buff *skb, const struct qdisc_size_table *stab)
{
int pkt_len, slot;
pkt_len = skb->len + stab->szopts.overhead;
if (unlikely(!stab->szopts.tsize))
goto out;
slot = pkt_len + stab->szopts.cell_align;
if (unlikely(slot < 0))
slot = 0;
slot >>= stab->szopts.cell_log;
if (likely(slot < stab->szopts.tsize))
pkt_len = stab->data[slot];
else
pkt_len = stab->data[stab->szopts.tsize - 1] *
(slot / stab->szopts.tsize) +
stab->data[slot % stab->szopts.tsize];
pkt_len <<= stab->szopts.size_log;
out:
if (unlikely(pkt_len < 1))
pkt_len = 1;
qdisc_skb_cb(skb)->pkt_len = pkt_len;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
jussi kivilinna | jussi kivilinna | 170 | 98.84% | 1 | 50.00% |
eric dumazet | eric dumazet | 2 | 1.16% | 1 | 50.00% |
| Total | 172 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL(__qdisc_calculate_pkt_len);
void qdisc_warn_nonwc(const char *txt, struct Qdisc *qdisc)
{
if (!(qdisc->flags & TCQ_F_WARN_NONWC)) {
pr_warn("%s: %s qdisc %X: is non-work-conserving?\n",
txt, qdisc->ops->id, qdisc->handle >> 16);
qdisc->flags |= TCQ_F_WARN_NONWC;
}
}
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| Person | Tokens | Prop | Commits | CommitProp |
jarek poplawski | jarek poplawski | 51 | 96.23% | 1 | 33.33% |
florian westphal | florian westphal | 1 | 1.89% | 1 | 33.33% |
eric dumazet | eric dumazet | 1 | 1.89% | 1 | 33.33% |
| Total | 53 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL(qdisc_warn_nonwc);
static enum hrtimer_restart qdisc_watchdog(struct hrtimer *timer)
{
struct qdisc_watchdog *wd = container_of(timer, struct qdisc_watchdog,
timer);
rcu_read_lock();
qdisc_unthrottled(wd->qdisc);
__netif_schedule(qdisc_root(wd->qdisc));
rcu_read_unlock();
return HRTIMER_NORESTART;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 36 | 67.92% | 1 | 16.67% |
david s. miller | david s. miller | 7 | 13.21% | 2 | 33.33% |
john fastabend | john fastabend | 6 | 11.32% | 1 | 16.67% |
eric dumazet | eric dumazet | 3 | 5.66% | 1 | 16.67% |
stephen hemminger | stephen hemminger | 1 | 1.89% | 1 | 16.67% |
| Total | 53 | 100.00% | 6 | 100.00% |
void qdisc_watchdog_init(struct qdisc_watchdog *wd, struct Qdisc *qdisc)
{
hrtimer_init(&wd->timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS_PINNED);
wd->timer.function = qdisc_watchdog;
wd->qdisc = qdisc;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 31 | 75.61% | 1 | 33.33% |
david s. miller | david s. miller | 9 | 21.95% | 1 | 33.33% |
eric dumazet | eric dumazet | 1 | 2.44% | 1 | 33.33% |
| Total | 41 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL(qdisc_watchdog_init);
void qdisc_watchdog_schedule_ns(struct qdisc_watchdog *wd, u64 expires, bool throttle)
{
if (test_bit(__QDISC_STATE_DEACTIVATED,
&qdisc_root_sleeping(wd->qdisc)->state))
return;
if (throttle)
qdisc_throttled(wd->qdisc);
if (wd->last_expires == expires)
return;
wd->last_expires = expires;
hrtimer_start(&wd->timer,
ns_to_ktime(expires),
HRTIMER_MODE_ABS_PINNED);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
eric dumazet | eric dumazet | 32 | 42.67% | 5 | 62.50% |
patrick mchardy | patrick mchardy | 23 | 30.67% | 1 | 12.50% |
jarek poplawski | jarek poplawski | 18 | 24.00% | 1 | 12.50% |
jiri pirko | jiri pirko | 2 | 2.67% | 1 | 12.50% |
| Total | 75 | 100.00% | 8 | 100.00% |
EXPORT_SYMBOL(qdisc_watchdog_schedule_ns);
void qdisc_watchdog_cancel(struct qdisc_watchdog *wd)
{
hrtimer_cancel(&wd->timer);
qdisc_unthrottled(wd->qdisc);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 21 | 84.00% | 1 | 33.33% |
eric dumazet | eric dumazet | 3 | 12.00% | 1 | 33.33% |
david s. miller | david s. miller | 1 | 4.00% | 1 | 33.33% |
| Total | 25 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL(qdisc_watchdog_cancel);
static struct hlist_head *qdisc_class_hash_alloc(unsigned int n)
{
unsigned int size = n * sizeof(struct hlist_head), i;
struct hlist_head *h;
if (size <= PAGE_SIZE)
h = kmalloc(size, GFP_KERNEL);
else
h = (struct hlist_head *)
__get_free_pages(GFP_KERNEL, get_order(size));
if (h != NULL) {
for (i = 0; i < n; i++)
INIT_HLIST_HEAD(&h[i]);
}
return h;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 96 | 98.97% | 1 | 50.00% |
adrian bunk | adrian bunk | 1 | 1.03% | 1 | 50.00% |
| Total | 97 | 100.00% | 2 | 100.00% |
static void qdisc_class_hash_free(struct hlist_head *h, unsigned int n)
{
unsigned int size = n * sizeof(struct hlist_head);
if (size <= PAGE_SIZE)
kfree(h);
else
free_pages((unsigned long)h, get_order(size));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 53 | 100.00% | 1 | 100.00% |
| Total | 53 | 100.00% | 1 | 100.00% |
void qdisc_class_hash_grow(struct Qdisc *sch, struct Qdisc_class_hash *clhash)
{
struct Qdisc_class_common *cl;
struct hlist_node *next;
struct hlist_head *nhash, *ohash;
unsigned int nsize, nmask, osize;
unsigned int i, h;
/* Rehash when load factor exceeds 0.75 */
if (clhash->hashelems * 4 <= clhash->hashsize * 3)
return;
nsize = clhash->hashsize * 2;
nmask = nsize - 1;
nhash = qdisc_class_hash_alloc(nsize);
if (nhash == NULL)
return;
ohash = clhash->hash;
osize = clhash->hashsize;
sch_tree_lock(sch);
for (i = 0; i < osize; i++) {
hlist_for_each_entry_safe(cl, next, &ohash[i], hnode) {
h = qdisc_class_hash(cl->classid, nmask);
hlist_add_head(&cl->hnode, &nhash[h]);
}
}
clhash->hash = nhash;
clhash->hashsize = nsize;
clhash->hashmask = nmask;
sch_tree_unlock(sch);
qdisc_class_hash_free(ohash, osize);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 190 | 100.00% | 1 | 100.00% |
| Total | 190 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL(qdisc_class_hash_grow);
int qdisc_class_hash_init(struct Qdisc_class_hash *clhash)
{
unsigned int size = 4;
clhash->hash = qdisc_class_hash_alloc(size);
if (clhash->hash == NULL)
return -ENOMEM;
clhash->hashsize = size;
clhash->hashmask = size - 1;
clhash->hashelems = 0;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 60 | 100.00% | 1 | 100.00% |
| Total | 60 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL(qdisc_class_hash_init);
void qdisc_class_hash_destroy(struct Qdisc_class_hash *clhash)
{
qdisc_class_hash_free(clhash->hash, clhash->hashsize);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 21 | 100.00% | 1 | 100.00% |
| Total | 21 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL(qdisc_class_hash_destroy);
void qdisc_class_hash_insert(struct Qdisc_class_hash *clhash,
struct Qdisc_class_common *cl)
{
unsigned int h;
INIT_HLIST_NODE(&cl->hnode);
h = qdisc_class_hash(cl->classid, clhash->hashmask);
hlist_add_head(&cl->hnode, &clhash->hash[h]);
clhash->hashelems++;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 61 | 100.00% | 1 | 100.00% |
| Total | 61 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL(qdisc_class_hash_insert);
void qdisc_class_hash_remove(struct Qdisc_class_hash *clhash,
struct Qdisc_class_common *cl)
{
hlist_del(&cl->hnode);
clhash->hashelems--;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 28 | 100.00% | 1 | 100.00% |
| Total | 28 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL(qdisc_class_hash_remove);
/* Allocate an unique handle from space managed by kernel
* Possible range is [8000-FFFF]:0000 (0x8000 values)
*/
static u32 qdisc_alloc_handle(struct net_device *dev)
{
int i = 0x8000;
static u32 autohandle = TC_H_MAKE(0x80000000U, 0);
do {
autohandle += TC_H_MAKE(0x10000U, 0);
if (autohandle == TC_H_MAKE(TC_H_ROOT, 0))
autohandle = TC_H_MAKE(0x80000000U, 0);
if (!qdisc_lookup(dev, autohandle))
return autohandle;
cond_resched();
} while (--i > 0);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pre-git | pre-git | 72 | 83.72% | 2 | 50.00% |
eric dumazet | eric dumazet | 13 | 15.12% | 1 | 25.00% |
adrian bunk | adrian bunk | 1 | 1.16% | 1 | 25.00% |
| Total | 86 | 100.00% | 4 | 100.00% |
void qdisc_tree_reduce_backlog(struct Qdisc *sch, unsigned int n,
unsigned int len)
{
const struct Qdisc_class_ops *cops;
unsigned long cl;
u32 parentid;
int drops;
if (n == 0 && len == 0)
return;
drops = max_t(int, n, 0);
rcu_read_lock();
while ((parentid = sch->parent)) {
if (TC_H_MAJ(parentid) == TC_H_MAJ(TC_H_INGRESS))
break;
if (sch->flags & TCQ_F_NOPARENT)
break;
/* TODO: perform the search on a per txq basis */
sch = qdisc_lookup(qdisc_dev(sch), TC_H_MAJ(parentid));
if (sch == NULL) {
WARN_ON_ONCE(parentid != TC_H_ROOT);
break;
}
cops = sch->ops->cl_ops;
if (cops->qlen_notify) {
cl = cops->get(sch, parentid);
cops->qlen_notify(sch, cl);
cops->put(sch, cl);
}
sch->q.qlen -= n;
sch->qstats.backlog -= len;
__qdisc_qstats_drop(sch, drops);
}
rcu_read_unlock();
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 123 | 62.76% | 3 | 30.00% |
eric dumazet | eric dumazet | 37 | 18.88% | 3 | 30.00% |
americo wang | americo wang | 17 | 8.67% | 1 | 10.00% |
jarek poplawski | jarek poplawski | 12 | 6.12% | 1 | 10.00% |
john fastabend | john fastabend | 4 | 2.04% | 1 | 10.00% |
david s. miller | david s. miller | 3 | 1.53% | 1 | 10.00% |
| Total | 196 | 100.00% | 10 | 100.00% |
EXPORT_SYMBOL(qdisc_tree_reduce_backlog);
static void notify_and_destroy(struct net *net, struct sk_buff *skb,
struct nlmsghdr *n, u32 clid,
struct Qdisc *old, struct Qdisc *new)
{
if (new || old)
qdisc_notify(net, skb, n, clid, old, new);
if (old)
qdisc_destroy(old);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
david s. miller | david s. miller | 57 | 89.06% | 1 | 50.00% |
thomas goff | thomas goff | 7 | 10.94% | 1 | 50.00% |
| Total | 64 | 100.00% | 2 | 100.00% |
/* Graft qdisc "new" to class "classid" of qdisc "parent" or
* to device "dev".
*
* When appropriate send a netlink notification using 'skb'
* and "n".
*
* On success, destroy old qdisc.
*/
static int qdisc_graft(struct net_device *dev, struct Qdisc *parent,
struct sk_buff *skb, struct nlmsghdr *n, u32 classid,
struct Qdisc *new, struct Qdisc *old)
{
struct Qdisc *q = old;
struct net *net = dev_net(dev);
int err = 0;
if (parent == NULL) {
unsigned int i, num_q, ingress;
ingress = 0;
num_q = dev->num_tx_queues;
if ((q && q->flags & TCQ_F_INGRESS) ||
(new && new->flags & TCQ_F_INGRESS)) {
num_q = 1;
ingress = 1;
if (!dev_ingress_queue(dev))
return -ENOENT;
}
if (dev->flags & IFF_UP)
dev_deactivate(dev);
if (new && new->ops->attach)
goto skip;
for (i = 0; i < num_q; i++) {
struct netdev_queue *dev_queue = dev_ingress_queue(dev);
if (!ingress)
dev_queue = netdev_get_tx_queue(dev, i);
old = dev_graft_qdisc(dev_queue, new);
if (new && i > 0)
atomic_inc(&new->refcnt);
if (!ingress)
qdisc_destroy(old);
}
skip:
if (!ingress) {
notify_and_destroy(net, skb, n, classid,
dev->qdisc, new);
if (new && !new->ops->attach)
atomic_inc(&new->refcnt);
dev->qdisc = new ? : &noop_qdisc;
if (new && new->ops->attach)
new->ops->attach(new);
} else {
notify_and_destroy(net, skb, n, classid, old, new);
}
if (dev->flags & IFF_UP)
dev_activate(dev);
} else {
const struct Qdisc_class_ops *cops = parent->ops->cl_ops;
err = -EOPNOTSUPP;
if (cops && cops->graft) {
unsigned long cl = cops->get(parent, classid);
if (cl) {
err = cops->graft(parent, cl, new, &old);
cops->put(parent, cl);
} else
err = -ENOENT;
}
if (!err)
notify_and_destroy(net, skb, n, classid, old, new);
}
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
david s. miller | david s. miller | 180 | 41.00% | 3 | 18.75% |
pre-git | pre-git | 131 | 29.84% | 4 | 25.00% |
patrick mchardy | patrick mchardy | 42 | 9.57% | 2 | 12.50% |
jarek poplawski | jarek poplawski | 28 | 6.38% | 1 | 6.25% |
americo wang | americo wang | 24 | 5.47% | 1 | 6.25% |
eric dumazet | eric dumazet | 16 | 3.64% | 2 | 12.50% |
thomas goff | thomas goff | 16 | 3.64% | 1 | 6.25% |
adrian bunk | adrian bunk | 1 | 0.23% | 1 | 6.25% |
thomas graf | thomas graf | 1 | 0.23% | 1 | 6.25% |
| Total | 439 | 100.00% | 16 | 100.00% |
/* lockdep annotation is needed for ingress; egress gets it only for name */
static struct lock_class_key qdisc_tx_lock;
static struct lock_class_key qdisc_rx_lock;
/*
Allocate and initialize new qdisc.
Parameters are passed via opt.
*/
static struct Qdisc *
qdisc_create(struct net_device *dev, struct netdev_queue *dev_queue,
struct Qdisc *p, u32 parent, u32 handle,
struct nlattr **tca, int *errp)
{
int err;
struct nlattr *kind = tca[TCA_KIND];
struct Qdisc *sch;
struct Qdisc_ops *ops;
struct qdisc_size_table *stab;
ops = qdisc_lookup_ops(kind);
#ifdef CONFIG_MODULES
if (ops == NULL && kind != NULL) {
char name[IFNAMSIZ];
if (nla_strlcpy(name, kind, IFNAMSIZ) < IFNAMSIZ) {
/* We dropped the RTNL semaphore in order to
* perform the module load. So, even if we
* succeeded in loading the module we have to
* tell the caller to replay the request. We
* indicate this using -EAGAIN.
* We replay the request because the device may
* go away in the mean time.
*/
rtnl_unlock();
request_module("sch_%s", name);
rtnl_lock();
ops = qdisc_lookup_ops(kind);
if (ops != NULL) {
/* We will try again qdisc_lookup_ops,
* so don't keep a reference.
*/
module_put(ops->owner);
err = -EAGAIN;
goto err_out;
}
}
}
#endif
err = -ENOENT;
if (ops == NULL)
goto err_out;
sch = qdisc_alloc(dev_queue, ops);
if (IS_ERR(sch)) {
err = PTR_ERR(sch);
goto err_out2;
}
sch->parent = parent;
if (handle == TC_H_INGRESS) {
sch->flags |= TCQ_F_INGRESS;
handle = TC_H_MAKE(TC_H_INGRESS, 0);
lockdep_set_class(qdisc_lock(sch), &qdisc_rx_lock);
} else {
if (handle == 0) {
handle = qdisc_alloc_handle(dev);
err = -ENOMEM;
if (handle == 0)
goto err_out3;
}
lockdep_set_class(qdisc_lock(sch), &qdisc_tx_lock);
if (!netif_is_multiqueue(dev))
sch->flags |= TCQ_F_ONETXQUEUE;
}
sch->handle = handle;
if (!ops->init || (err = ops->init(sch, tca[TCA_OPTIONS])) == 0) {
if (qdisc_is_percpu_stats(sch)) {
sch->cpu_bstats =
netdev_alloc_pcpu_stats(struct gnet_stats_basic_cpu);
if (!sch->cpu_bstats)
goto err_out4;
sch->cpu_qstats = alloc_percpu(struct gnet_stats_queue);
if (!sch->cpu_qstats)
goto err_out4;
}
if (tca[TCA_STAB]) {
stab = qdisc_get_stab(tca[TCA_STAB]);
if (IS_ERR(stab)) {
err = PTR_ERR(stab);
goto err_out4;
}
rcu_assign_pointer(sch->stab, stab);
}
if (tca[TCA_RATE]) {
spinlock_t *root_lock;
err = -EOPNOTSUPP;
if (sch->flags & TCQ_F_MQROOT)
goto err_out4;
if ((sch->parent != TC_H_ROOT) &&
!(sch->flags & TCQ_F_INGRESS) &&
(!p || !(p->flags & TCQ_F_MQROOT)))
root_lock = qdisc_root_sleeping_lock(sch);
else
root_lock = qdisc_lock(sch);
err = gen_new_estimator(&sch->bstats,
sch->cpu_bstats,
&sch->rate_est,
root_lock,
tca[TCA_RATE]);
if (err)
goto err_out4;
}
qdisc_list_add(sch);
return sch;
}
err_out3:
dev_put(dev);
kfree((char *) sch - sch->padded);
err_out2:
module_put(ops->owner);
err_out:
*errp = err;
return NULL;
err_out4:
free_percpu(sch->cpu_bstats);
free_percpu(sch->cpu_qstats);
/*
* Any broken qdiscs that would require a ops->reset() here?
* The qdisc was never in action so it shouldn't be necessary.
*/
qdisc_put_stab(rtnl_dereference(sch->stab));
if (ops->destroy)
ops->destroy(sch);
goto err_out3;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pre-git | pre-git | 222 | 35.52% | 4 | 12.12% |
patrick mchardy | patrick mchardy | 95 | 15.20% | 8 | 24.24% |
jarek poplawski | jarek poplawski | 70 | 11.20% | 4 | 12.12% |
john fastabend | john fastabend | 66 | 10.56% | 2 | 6.06% |
thomas graf | thomas graf | 53 | 8.48% | 4 | 12.12% |
jussi kivilinna | jussi kivilinna | 47 | 7.52% | 1 | 3.03% |
catalin boie | catalin boie | 32 | 5.12% | 1 | 3.03% |
eric dumazet | eric dumazet | 21 | 3.36% | 2 | 6.06% |
david s. miller | david s. miller | 15 | 2.40% | 3 | 9.09% |
linus torvalds | linus torvalds | 1 | 0.16% | 1 | 3.03% |
jamal hadi salim | jamal hadi salim | 1 | 0.16% | 1 | 3.03% |
johannes berg | johannes berg | 1 | 0.16% | 1 | 3.03% |
sabrina dubroca | sabrina dubroca | 1 | 0.16% | 1 | 3.03% |
| Total | 625 | 100.00% | 33 | 100.00% |
static int qdisc_change(struct Qdisc *sch, struct nlattr **tca)
{
struct qdisc_size_table *ostab, *stab = NULL;
int err = 0;
if (tca[TCA_OPTIONS]) {
if (sch->ops->change == NULL)
return -EINVAL;
err = sch->ops->change(sch, tca[TCA_OPTIONS]);
if (err)
return err;
}
if (tca[TCA_STAB]) {
stab = qdisc_get_stab(tca[TCA_STAB]);
if (IS_ERR(stab))
return PTR_ERR(stab);
}
ostab = rtnl_dereference(sch->stab);
rcu_assign_pointer(sch->stab, stab);
qdisc_put_stab(ostab);
if (tca[TCA_RATE]) {
/* NB: ignores errors from replace_estimator
because change can't be undone. */
if (sch->flags & TCQ_F_MQROOT)
goto out;
gen_replace_estimator(&sch->bstats,
sch->cpu_bstats,
&sch->rate_est,
qdisc_root_sleeping_lock(sch),
tca[TCA_RATE]);
}
out:
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pre-git | pre-git | 86 | 46.24% | 2 | 16.67% |
jussi kivilinna | jussi kivilinna | 55 | 29.57% | 1 | 8.33% |
patrick mchardy | patrick mchardy | 16 | 8.60% | 2 | 16.67% |
eric dumazet | eric dumazet | 15 | 8.06% | 1 | 8.33% |
john fastabend | john fastabend | 4 | 2.15% | 1 | 8.33% |
thomas graf | thomas graf | 4 | 2.15% | 1 | 8.33% |
david s. miller | david s. miller | 4 | 2.15% | 2 | 16.67% |
stephen hemminger | stephen hemminger | 1 | 0.54% | 1 | 8.33% |
jarek poplawski | jarek poplawski | 1 | 0.54% | 1 | 8.33% |
| Total | 186 | 100.00% | 12 | 100.00% |
struct check_loop_arg {
struct qdisc_walker w;
struct Qdisc *p;
int depth;
};
static int check_loop_fn(struct Qdisc *q, unsigned long cl, struct qdisc_walker *w);
static int check_loop(struct Qdisc *q, struct Qdisc *p, int depth)
{
struct check_loop_arg arg;
if (q->ops->cl_ops == NULL)
return 0;
arg.w.stop = arg.w.skip = arg.w.count = 0;
arg.w.fn = check_loop_fn;
arg.depth = depth;
arg.p = p;
q->ops->cl_ops->walk(q, &arg.w);
return arg.w.stop ? -ELOOP : 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pre-git | pre-git | 104 | 100.00% | 1 | 100.00% |
| Total | 104 | 100.00% | 1 | 100.00% |
static int
check_loop_fn(struct Qdisc *q, unsigned long cl, struct qdisc_walker *w)
{
struct Qdisc *leaf;
const struct Qdisc_class_ops *cops = q->ops->cl_ops;
struct check_loop_arg *arg = (struct check_loop_arg *)w;
leaf = cops->leaf(q, cl);
if (leaf) {
if (leaf == arg->p || arg->depth > 7)
return -ELOOP;
return check_loop(leaf, arg->p, arg->depth + 1);
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pre-git | pre-git | 102 | 99.03% | 2 | 66.67% |
eric dumazet | eric dumazet | 1 | 0.97% | 1 | 33.33% |
| Total | 103 | 100.00% | 3 | 100.00% |
/*
* Delete/get qdisc.
*/
static int tc_get_qdisc(struct sk_buff *skb, struct nlmsghdr *n)
{
struct net *net = sock_net(skb->sk);
struct tcmsg *tcm = nlmsg_data(n);
struct nlattr *tca[TCA_MAX + 1];
struct net_device *dev;
u32 clid;
struct Qdisc *q = NULL;
struct Qdisc *p = NULL;
int err;
if ((n->nlmsg_type != RTM_GETQDISC) &&
!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN))
return -EPERM;
err = nlmsg_parse(n, sizeof(*tcm), tca, TCA_MAX, NULL);
if (err < 0)
return err;
dev = __dev_get_by_index(net, tcm->tcm_ifindex);
if (!dev)
return -ENODEV;
clid = tcm->tcm_parent;
if (clid) {
if (clid != TC_H_ROOT) {
if (TC_H_MAJ(clid) != TC_H_MAJ(TC_H_INGRESS)) {
p = qdisc_lookup(dev, TC_H_MAJ(clid));
if (!p)
return -ENOENT;
q = qdisc_leaf(p, clid);
} else if (dev_ingress_queue(dev)) {
q = dev_ingress_queue(dev)->qdisc_sleeping;
}
} else {
q = dev->qdisc;
}
if (!q)
return -ENOENT;
if (tcm->tcm_handle && q->handle != tcm->tcm_handle)
return -EINVAL;
} else {
q = qdisc_lookup(dev, tcm->tcm_handle);
if (!q)
return -ENOENT;
}
if (tca[TCA_KIND] && nla_strcmp(tca[TCA_KIND], q->ops->id))
return -EINVAL;
if (n->nlmsg_type == RTM_DELQDISC) {
if (!clid)
return -EINVAL;
if (q->handle == 0)
return -ENOENT;
err = qdisc_graft(dev, p, skb, n, clid, NULL, q);
if (err != 0)
return err;
} else {
qdisc_notify(net, skb, n, clid, NULL, q);
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pre-git | pre-git | 259 | 65.74% | 3 | 16.67% |
patrick mchardy | patrick mchardy | 37 | 9.39% | 2 | 11.11% |
hong zhi guo | hong zhi guo | 26 | 6.60% | 1 | 5.56% |
eric dumazet | eric dumazet | 26 | 6.60% | 2 | 11.11% |
eric w. biederman | eric w. biederman | 21 | 5.33% | 2 | 11.11% |
denis v. lunev | denis v. lunev | 9 | 2.28% | 1 | 5.56% |
david s. miller | david s. miller | 7 | 1.78% | 4 | 22.22% |
stephane graber | stephane graber | 4 | 1.02% | 1 | 5.56% |
hideaki yoshifuji | hideaki yoshifuji | 3 | 0.76% | 1 | 5.56% |
thomas goff | thomas goff | 2 | 0.51% | 1 | 5.56% |
| Total | 394 | 100.00% | 18 | 100.00% |
/*
* Create/change qdisc.
*/
static int tc_modify_qdisc(struct sk_buff *skb, struct nlmsghdr *n)
{
struct net *net = sock_net(skb->sk);
struct tcmsg *tcm;
struct nlattr *tca[TCA_MAX + 1];
struct net_device *dev;
u32 clid;
struct Qdisc *q, *p;
int err;
if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN))
return -EPERM;
replay:
/* Reinit, just in case something touches this. */
err = nlmsg_parse(n, sizeof(*tcm), tca, TCA_MAX, NULL);
if (err < 0)
return err;
tcm = nlmsg_data(n);
clid = tcm->tcm_parent;
q = p = NULL;
dev = __dev_get_by_index(net, tcm->tcm_ifindex);
if (!dev)
return -ENODEV;
if (clid) {
if (clid != TC_H_ROOT) {
if (clid != TC_H_INGRESS) {
p = qdisc_lookup(dev, TC_H_MAJ(clid));
if (!p)
return -ENOENT;
q = qdisc_leaf(p, clid);
} else if (dev_ingress_queue_create(dev)) {
q = dev_ingress_queue(dev)->qdisc_sleeping;
}
} else {
q = dev->qdisc;
}
/* It may be default qdisc, ignore it */
if (q && q->handle == 0)
q = NULL;
if (!q || !tcm->tcm_handle || q->handle != tcm->tcm_handle) {
if (tcm->tcm_handle) {
if (q && !(n->nlmsg_flags & NLM_F_REPLACE))
return -EEXIST;
if (TC_H_MIN(tcm->tcm_handle))
return -EINVAL;
q = qdisc_lookup(dev, tcm->tcm_handle);
if (!q)
goto create_n_graft;
if (n->nlmsg_flags & NLM_F_EXCL)
return -EEXIST;
if (tca[TCA_KIND] && nla_strcmp(tca[TCA_KIND], q->ops->id))
return -EINVAL;
if (q == p ||
(p && check_loop(q, p, 0)))
return -ELOOP;
atomic_inc(&q->refcnt);
goto graft;
} else {
if (!q)
goto create_n_graft;
/* This magic test requires explanation.
*
* We know, that some child q is already
* attached to this parent and have choice:
* either to change it or to create/graft new one.
*
* 1. We are allowed to create/graft only
* if CREATE and REPLACE flags are set.
*
* 2. If EXCL is set, requestor wanted to say,
* that qdisc tcm_handle is not expected
* to exist, so that we choose create/graft too.
*
* 3. The last case is when no flags are set.
* Alas, it is sort of hole in API, we
* cannot decide what to do unambiguously.
* For now we select create/graft, if
* user gave KIND, which does not match existing.
*/
if ((n->nlmsg_flags & NLM_F_CREATE) &&
(n->nlmsg_flags & NLM_F_REPLACE) &&
((n->nlmsg_flags & NLM_F_EXCL) ||
(tca[TCA_KIND] &&
nla_strcmp(tca[TCA_KIND], q->ops->id))))
goto create_n_graft;
}
}
} else {
if (!tcm->tcm_handle)
return -EINVAL;
q = qdisc_lookup(dev, tcm->tcm_handle);
}
/* Change qdisc parameters */
if (q == NULL)
return -ENOENT;
if (n->nlmsg_flags & NLM_F_EXCL)
return -EEXIST;
if (tca[TCA_KIND] && nla_strcmp(tca[TCA_KIND], q->ops->id))
return -EINVAL;
err = qdisc_change(q, tca);
if (err == 0)
qdisc_notify(net, skb, n, clid, NULL, q);
return err;
create_n_graft:
if (!(n->nlmsg_flags & NLM_F_CREATE))
return -ENOENT;
if (clid == TC_H_INGRESS) {
if (dev_ingress_queue(dev))
q = qdisc_create(dev, dev_ingress_queue(dev), p,
tcm->tcm_parent, tcm->tcm_parent,
tca, &err);
else
err = -ENOENT;
} else {
struct netdev_queue *dev_queue;
if (p && p->ops->cl_ops && p->ops->cl_ops->select_queue)
dev_queue = p->ops->cl_ops->select_queue(p, tcm);
else if (p)
dev_queue = p->dev_queue;
else
dev_queue = netdev_get_tx_queue(dev, 0);
q = qdisc_create(dev, dev_queue, p,
tcm->tcm_parent, tcm->tcm_handle,
tca, &err);
}
if (q == NULL) {
if (err == -EAGAIN)
goto replay;
return err;
}
graft:
err = qdisc_graft(dev, p, skb, n, clid, q, NULL);
if (err) {
if (q)
qdisc_destroy(q);
return err;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pre-git | pre-git | 538 | 69.24% | 5 | 17.86% |
david s. miller | david s. miller | 49 | 6.31% | 7 | 25.00% |
eric dumazet | eric dumazet | 46 | 5.92% | 2 | 7.14% |
catalin boie | catalin boie | 34 | 4.38% | 1 | 3.57% |
hong zhi guo | hong zhi guo | 28 | 3.60% | 1 | 3.57% |
jarek poplawski | jarek poplawski | 26 | 3.35% | 1 | 3.57% |
patrick mchardy | patrick mchardy | 23 | 2.96% | 4 | 14.29% |
eric w. biederman | eric w. biederman | 14 | 1.80% | 3 | 10.71% |
denis v. lunev | denis v. lunev | 9 | 1.16% | 1 | 3.57% |
stephane graber | stephane graber | 4 | 0.51% | 1 | 3.57% |
thomas goff | thomas goff | 3 | 0.39% | 1 | 3.57% |
hideaki yoshifuji | hideaki yoshifuji | 3 | 0.39% | 1 | 3.57% |
| Total | 777 | 100.00% | 28 | 100.00% |
static int tc_fill_qdisc(struct sk_buff *skb, struct Qdisc *q, u32 clid,
u32 portid, u32 seq, u16 flags, int event)
{
struct gnet_stats_basic_cpu __percpu *cpu_bstats = NULL;
struct gnet_stats_queue __percpu *cpu_qstats = NULL;
struct tcmsg *tcm;
struct nlmsghdr *nlh;
unsigned char *b = skb_tail_pointer(skb);
struct gnet_dump d;
struct qdisc_size_table *stab;
__u32 qlen;
cond_resched();
nlh = nlmsg_put(skb, portid, seq, event, sizeof(*tcm), flags);
if (!nlh)
goto out_nlmsg_trim;
tcm = nlmsg_data(nlh);
tcm->tcm_family = AF_UNSPEC;
tcm->tcm__pad1 = 0;
tcm->tcm__pad2 = 0;
tcm->tcm_ifindex = qdisc_dev(q)->ifindex;
tcm->tcm_parent = clid;
tcm->tcm_handle = q->handle;
tcm->tcm_info = atomic_read(&q->refcnt);
if (nla_put_string(skb, TCA_KIND, q->ops->id))
goto nla_put_failure;
if (q->ops->dump && q->ops->dump(q, skb) < 0)
goto nla_put_failure;
qlen = q->q.qlen;
stab = rtnl_dereference(q->stab);
if (stab && qdisc_dump_stab(skb, stab) < 0)
goto nla_put_failure;
if (gnet_stats_start_copy_compat(skb, TCA_STATS2, TCA_STATS, TCA_XSTATS,
qdisc_root_sleeping_lock(q), &d,
TCA_PAD) < 0)
goto nla_put_failure;
if (q->ops->dump_stats && q->ops->dump_stats(q, &d) < 0)
goto nla_put_failure;
if (qdisc_is_percpu_stats(q)) {
cpu_bstats = q->cpu_bstats;
cpu_qstats = q->cpu_qstats;
}
if (gnet_stats_copy_basic(&d, cpu_bstats, &q->bstats) < 0 ||
gnet_stats_copy_rate_est(&d, &q->bstats, &q->rate_est) < 0 ||
gnet_stats_copy_queue(&d, cpu_qstats, &q->qstats, qlen) < 0)
goto nla_put_failure;
if (gnet_stats_finish_copy(&d) < 0)
goto nla_put_failure;
nlh->nlmsg_len = skb_tail_pointer(skb) - b;
return skb->len;
out_nlmsg_trim:
nla_put_failure:
nlmsg_trim(skb, b);
return -1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pre-git | pre-git | 191 | 45.37% | 4 | 15.38% |
thomas graf | thomas graf | 85 | 20.19% | 2 | 7.69% |
john fastabend | john fastabend | 46 | 10.93% | 3 | 11.54% |
david s. miller | david s. miller | 27 | 6.41% | 5 | 19.23% |
eric dumazet | eric dumazet | 22 | 5.23% | 3 | 11.54% |
patrick mchardy | patrick mchardy | 18 | 4.28% | 2 | 7.69% |
jussi kivilinna | jussi kivilinna | 17 | 4.04% | 1 | 3.85% |
arnaldo carvalho de melo | arnaldo carvalho de melo | 7 | 1.66% | 2 | 7.69% |
jamal hadi salim | jamal hadi salim | 3 | 0.71% | 1 | 3.85% |
eric w. biederman | eric w. biederman | 2 | 0.48% | 1 | 3.85% |
nicolas dichtel | nicolas dichtel | 2 | 0.48% | 1 | 3.85% |
jarek poplawski | jarek poplawski | 1 | 0.24% | 1 | 3.85% |
| Total | 421 | 100.00% | 26 | 100.00% |
static bool tc_qdisc_dump_ignore(struct Qdisc *q)
{
return (q->flags & TCQ_F_BUILTIN) ? true : false;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
eric dumazet | eric dumazet | 24 | 100.00% | 1 | 100.00% |
| Total | 24 | 100.00% | 1 | 100.00% |
static int qdisc_notify(struct net *net, struct sk_buff *oskb,
struct nlmsghdr *n, u32 clid,
struct Qdisc *old, struct Qdisc *new)
{
struct sk_buff *skb;
u32 portid = oskb ? NETLINK_CB(oskb).portid : 0;
skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
if (!skb)
return -ENOBUFS;
if (old && !tc_qdisc_dump_ignore(old)) {
if (tc_fill_qdisc(skb, old, clid, portid, n->nlmsg_seq,
0, RTM_DELQDISC) < 0)
goto err_out;
}
if (new && !tc_qdisc_dump_ignore(new)) {
if (tc_fill_qdisc(skb, new, clid, portid, n->nlmsg_seq,
old ? NLM_F_REPLACE : 0, RTM_NEWQDISC) < 0)
goto err_out;
}
if (skb->len)
return rtnetlink_send(skb, net, portid, RTNLGRP_TC,
n->nlmsg_flags & NLM_F_ECHO);
err_out:
kfree_skb(skb);
return -EINVAL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pre-git | pre-git | 163 | 87.63% | 3 | 37.50% |
eric dumazet | eric dumazet | 10 | 5.38% | 1 | 12.50% |
thomas goff | thomas goff | 6 | 3.23% | 1 | 12.50% |
eric w. biederman | eric w. biederman | 5 | 2.69% | 1 | 12.50% |
patrick mchardy | patrick mchardy | 1 | 0.54% | 1 | 12.50% |
denis v. lunev | denis v. lunev | 1 | 0.54% | 1 | 12.50% |
| Total | 186 | 100.00% | 8 | 100.00% |
static int tc_dump_qdisc_root(struct Qdisc *root, struct sk_buff *skb,
struct netlink_callback *cb,
int *q_idx_p, int s_q_idx)
{
int ret = 0, q_idx = *q_idx_p;
struct Qdisc *q;
if (!root)
return 0;
q = root;
if (q_idx < s_q_idx) {
q_idx++;
} else {
if (!tc_qdisc_dump_ignore(q) &&
tc_fill_qdisc(skb, q, q->parent, NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq, NLM_F_MULTI, RTM_NEWQDISC) <= 0)
goto done;
q_idx++;
}
list_for_each_entry(q, &root->list, list) {
if (q_idx < s_q_idx) {
q_idx++;
continue;
}
if (!tc_qdisc_dump_ignore(q) &&
tc_fill_qdisc(skb, q, q->parent, NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq, NLM_F_MULTI, RTM_NEWQDISC) <= 0)
goto done;
q_idx++;
}
out:
*q_idx_p = q_idx;
return ret;
done:
ret = -1;
goto out;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
david s. miller | david s. miller | 92 | 45.32% | 1 | 9.09% |
pre-git | pre-git | 77 | 37.93% | 3 | 27.27% |
patrick mchardy | patrick mchardy | 16 | 7.88% | 2 | 18.18% |
denis v. lunev | denis v. lunev | 6 | 2.96% | 1 | 9.09% |
pavel emelianov | pavel emelianov | 6 | 2.96% | 1 | 9.09% |
thomas graf | thomas graf | 3 | 1.48% | 1 | 9.09% |
eric w. biederman | eric w. biederman | 3 | 1.48% | 2 | 18.18% |
| Total | 203 | 100.00% | 11 | 100.00% |
static int tc_dump_qdisc(struct sk_buff *skb, struct netlink_callback *cb)
{
struct net *net = sock_net(skb->sk);
int idx, q_idx;
int s_idx, s_q_idx;
struct net_device *dev;
s_idx = cb->args[0];
s_q_idx = q_idx = cb->args[1];
idx = 0;
ASSERT_RTNL();
for_each_netdev(net, dev) {
struct netdev_queue *dev_queue;
if (idx < s_idx)
goto cont;
if (idx > s_idx)
s_q_idx = 0;
q_idx = 0;
if (tc_dump_qdisc_root(dev->qdisc, skb, cb, &q_idx, s_q_idx) < 0)
goto done;
dev_queue = dev_ingress_queue(dev);
if (dev_queue &&
tc_dump_qdisc_root(dev_queue->qdisc_sleeping, skb, cb,
&q_idx, s_q_idx) < 0)
goto done;
cont:
idx++;
}
done:
cb->args[0] = idx;
cb->args[1] = q_idx;
return skb->len;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
david s. miller | david s. miller | 157 | 82.20% | 2 | 28.57% |
pre-git | pre-git | 22 | 11.52% | 1 | 14.29% |
eric dumazet | eric dumazet | 9 | 4.71% | 2 | 28.57% |
patrick mchardy | patrick mchardy | 2 | 1.05% | 1 | 14.29% |
thomas goff | thomas goff | 1 | 0.52% | 1 | 14.29% |
| Total | 191 | 100.00% | 7 | 100.00% |
/************************************************
* Traffic classes manipulation. *
************************************************/
static int tc_ctl_tclass(struct sk_buff *skb, struct nlmsghdr *n)
{
struct net *net = sock_net(skb->sk);
struct tcmsg *tcm = nlmsg_data(n);
struct nlattr *tca[TCA_MAX + 1];
struct net_device *dev;
struct Qdisc *q = NULL;
const struct Qdisc_class_ops *cops;
unsigned long cl = 0;
unsigned long new_cl;
u32 portid;
u32 clid;
u32 qid;
int err;
if ((n->nlmsg_type != RTM_GETTCLASS) &&
!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN))
return -EPERM;
err = nlmsg_parse(n, sizeof(*tcm), tca, TCA_MAX, NULL);
if (err < 0)
return err;
dev = __dev_get_by_index(net, tcm->tcm_ifindex);
if (!dev)
return -ENODEV;
/*
parent == TC_H_UNSPEC - unspecified parent.
parent == TC_H_ROOT - class is root, which has no parent.
parent == X:0 - parent is root class.
parent == X:Y - parent is a node in hierarchy.
parent == 0:Y - parent is X:Y, where X:0 is qdisc.
handle == 0:0 - generate handle from kernel pool.
handle == 0:Y - class is X:Y, where X:0 is qdisc.
handle == X:Y - clear.
handle == X:0 - root class.
*/
/* Step 1. Determine qdisc handle X:0 */
portid = tcm->tcm_parent;
clid = tcm->tcm_handle;
qid = TC_H_MAJ(clid);
if (portid != TC_H_ROOT) {
u32 qid1 = TC_H_MAJ(portid);
if (qid && qid1) {
/* If both majors are known, they must be identical. */
if (qid != qid1)
return -EINVAL;
} else if (qid1) {
qid = qid1;
} else if (qid == 0)
qid = dev->qdisc->handle;
/* Now qid is genuine qdisc handle consistent
* both with parent and child.
*
* TC_H_MAJ(portid) still may be unspecified, complete it now.
*/
if (portid)
portid = TC_H_MAKE(qid, portid);
} else {
if (qid == 0)
qid = dev->qdisc->handle;
}
/* OK. Locate qdisc */
q = qdisc_lookup(dev, qid);
if (!q)
return -ENOENT;
/* An check that it supports classes */
cops = q->ops->cl_ops;
if (cops == NULL)
return -EINVAL;
/* Now try to get class */
if (clid == 0) {
if (portid == TC_H_ROOT)
clid = qid;
} else
clid = TC_H_MAKE(qid, clid);
if (clid)
cl = cops->get(q, clid);
if (cl == 0) {
err = -ENOENT;
if (n->nlmsg_type != RTM_NEWTCLASS ||
!(n->nlmsg_flags & NLM_F_CREATE))
goto out;
} else {
switch (n->nlmsg_type) {
case RTM_NEWTCLASS:
err = -EEXIST;
if (n->nlmsg_flags & NLM_F_EXCL)
goto out;
break;
case RTM_DELTCLASS:
err = -EOPNOTSUPP;
if (cops->delete)
err = cops->delete(q, cl);
if (err == 0)
tclass_notify(net, skb, n, q, cl, RTM_DELTCLASS);
goto out;
case RTM_GETTCLASS:
err = tclass_notify(net, skb, n, q, cl, RTM_NEWTCLASS);
goto out;
default:
err = -EINVAL;
goto out;
}
}
new_cl = cl;
err = -EOPNOTSUPP;
if (cops->change)
err = cops->change(q, clid, portid, tca, &new_cl);
if (err == 0)
tclass_notify(net, skb, n, q, new_cl, RTM_NEWTCLASS);
out:
if (cl)
cops->put(q, cl);
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pre-git | pre-git | 415 | 72.30% | 2 | 11.76% |
patrick mchardy | patrick mchardy | 60 | 10.45% | 3 | 17.65% |
hong zhi guo | hong zhi guo | 39 | 6.79% | 1 | 5.88% |
eric w. biederman | eric w. biederman | 30 | 5.23% | 3 | 17.65% |
denis v. lunev | denis v. lunev | 9 | 1.57% | 1 | 5.88% |
eric dumazet | eric dumazet | 6 | 1.05% | 2 | 11.76% |
thomas goff | thomas goff | 6 | 1.05% | 1 | 5.88% |
stephane graber | stephane graber | 4 | 0.70% | 1 | 5.88% |
hideaki yoshifuji | hideaki yoshifuji | 3 | 0.52% | 1 | 5.88% |
david s. miller | david s. miller | 2 | 0.35% | 2 | 11.76% |
| Total | 574 | 100.00% | 17 | 100.00% |
static int tc_fill_tclass(struct sk_buff *skb, struct Qdisc *q,
unsigned long cl,
u32 portid, u32 seq, u16 flags, int event)
{
struct tcmsg *tcm;
struct nlmsghdr *nlh;
unsigned char *b = skb_tail_pointer(skb);
struct gnet_dump d;
const struct Qdisc_class_ops *cl_ops = q->ops->cl_ops;
cond_resched();
nlh = nlmsg_put(skb, portid, seq, event, sizeof(*tcm), flags);
if (!nlh)
goto out_nlmsg_trim;
tcm = nlmsg_data(nlh);
tcm->tcm_family = AF_UNSPEC;
tcm->tcm__pad1 = 0;
tcm->tcm__pad2 = 0;
tcm->tcm_ifindex = qdisc_dev(q)->ifindex;
tcm->tcm_parent = q->handle;
tcm->tcm_handle = q->handle;
tcm->tcm_info = 0;
if (nla_put_string(skb, TCA_KIND, q->ops->id))
goto nla_put_failure;
if (cl_ops->dump && cl_ops->dump(q, cl, skb, tcm) < 0)
goto nla_put_failure;
if (gnet_stats_start_copy_compat(skb, TCA_STATS2, TCA_STATS, TCA_XSTATS,
qdisc_root_sleeping_lock(q), &d,
TCA_PAD) < 0)
goto nla_put_failure;
if (cl_ops->dump_stats && cl_ops->dump_stats(q, cl, &d) < 0)
goto nla_put_failure;
if (gnet_stats_finish_copy(&d) < 0)
goto nla_put_failure;
nlh->nlmsg_len = skb_tail_pointer(skb) - b;
return skb->len;
out_nlmsg_trim:
nla_put_failure:
nlmsg_trim(skb, b);
return -1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pre-git | pre-git | 165 | 55.93% | 2 | 11.76% |
thomas graf | thomas graf | 71 | 24.07% | 1 | 5.88% |
david s. miller | david s. miller | 23 | 7.80% | 4 | 23.53% |
eric dumazet | eric dumazet | 16 | 5.42% | 3 | 17.65% |
arnaldo carvalho de melo | arnaldo carvalho de melo | 7 | 2.37% | 2 | 11.76% |
patrick mchardy | patrick mchardy | 5 | 1.69% | 1 | 5.88% |
jamal hadi salim | jamal hadi salim | 3 | 1.02% | 1 | 5.88% |
eric w. biederman | eric w. biederman | 2 | 0.68% | 1 | 5.88% |
nicolas dichtel | nicolas dichtel | 2 | 0.68% | 1 | 5.88% |
jarek poplawski | jarek poplawski | 1 | 0.34% | 1 | 5.88% |
| Total | 295 | 100.00% | 17 | 100.00% |
static int tclass_notify(struct net *net, struct sk_buff *oskb,
struct nlmsghdr *n, struct Qdisc *q,
unsigned long cl, int event)
{
struct sk_buff *skb;
u32 portid = oskb ? NETLINK_CB(oskb).portid : 0;
skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
if (!skb)
return -ENOBUFS;
if (tc_fill_tclass(skb, q, cl, portid, n->nlmsg_seq, 0, event) < 0) {
kfree_skb(skb);
return -EINVAL;
}
return rtnetlink_send(skb, net, portid, RTNLGRP_TC,
n->nlmsg_flags & NLM_F_ECHO);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pre-git | pre-git | 110 | 90.16% | 2 | 33.33% |
thomas goff | thomas goff | 6 | 4.92% | 1 | 16.67% |
eric w. biederman | eric w. biederman | 4 | 3.28% | 1 | 16.67% |
patrick mchardy | patrick mchardy | 1 | 0.82% | 1 | 16.67% |
denis v. lunev | denis v. lunev | 1 | 0.82% | 1 | 16.67% |
| Total | 122 | 100.00% | 6 | 100.00% |
struct qdisc_dump_args {
struct qdisc_walker w;
struct sk_buff *skb;
struct netlink_callback *cb;
};
static int qdisc_class_dump(struct Qdisc *q, unsigned long cl, struct qdisc_walker *arg)
{
struct qdisc_dump_args *a = (struct qdisc_dump_args *)arg;
return tc_fill_tclass(a->skb, q, cl, NETLINK_CB(a->cb->skb).portid,
a->cb->nlh->nlmsg_seq, NLM_F_MULTI, RTM_NEWTCLASS);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pre-git | pre-git | 66 | 98.51% | 1 | 50.00% |
eric w. biederman | eric w. biederman | 1 | 1.49% | 1 | 50.00% |
| Total | 67 | 100.00% | 2 | 100.00% |
static int tc_dump_tclass_qdisc(struct Qdisc *q, struct sk_buff *skb,
struct tcmsg *tcm, struct netlink_callback *cb,
int *t_p, int s_t)
{
struct qdisc_dump_args arg;
if (tc_qdisc_dump_ignore(q) ||
*t_p < s_t || !q->ops->cl_ops ||
(tcm->tcm_parent &&
TC_H_MAJ(tcm->tcm_parent) != q->handle)) {
(*t_p)++;
return 0;
}
if (*t_p > s_t)
memset(&cb->args[1], 0, sizeof(cb->args)-sizeof(cb->args[0]));
arg.w.fn = qdisc_class_dump;
arg.skb = skb;
arg.cb = cb;
arg.w.stop = 0;
arg.w.skip = cb->args[1];
arg.w.count = 0;
q->ops->cl_ops->walk(q, &arg.w);
cb->args[1] = arg.w.count;
if (arg.w.stop)
return -1;
(*t_p)++;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pre-git | pre-git | 161 | 73.18% | 2 | 40.00% |
david s. miller | david s. miller | 47 | 21.36% | 1 | 20.00% |
patrick mchardy | patrick mchardy | 10 | 4.55% | 1 | 20.00% |
denis v. lunev | denis v. lunev | 2 | 0.91% | 1 | 20.00% |
| Total | 220 | 100.00% | 5 | 100.00% |
static int tc_dump_tclass_root(struct Qdisc *root, struct sk_buff *skb,
struct tcmsg *tcm, struct netlink_callback *cb,
int *t_p, int s_t)
{
struct Qdisc *q;
if (!root)
return 0;
if (tc_dump_tclass_qdisc(root, skb, tcm, cb, t_p, s_t) < 0)
return -1;
list_for_each_entry(q, &root->list, list) {
if (tc_dump_tclass_qdisc(q, skb, tcm, cb, t_p, s_t) < 0)
return -1;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
david s. miller | david s. miller | 104 | 99.05% | 1 | 50.00% |
pre-git | pre-git | 1 | 0.95% | 1 | 50.00% |
| Total | 105 | 100.00% | 2 | 100.00% |
static int tc_dump_tclass(struct sk_buff *skb, struct netlink_callback *cb)
{
struct tcmsg *tcm = nlmsg_data(cb->nlh);
struct net *net = sock_net(skb->sk);
struct netdev_queue *dev_queue;
struct net_device *dev;
int t, s_t;
if (nlmsg_len(cb->nlh) < sizeof(*tcm))
return 0;
dev = dev_get_by_index(net, tcm->tcm_ifindex);
if (!dev)
return 0;
s_t = cb->args[0];
t = 0;
if (tc_dump_tclass_root(dev->qdisc, skb, tcm, cb, &t, s_t) < 0)
goto done;
dev_queue = dev_ingress_queue(dev);
if (dev_queue &&
tc_dump_tclass_root(dev_queue->qdisc_sleeping, skb, tcm, cb,
&t, s_t) < 0)
goto done;
done:
cb->args[0] = t;
dev_put(dev);
return skb->len;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
david s. miller | david s. miller | 149 | 80.54% | 3 | 30.00% |
pre-git | pre-git | 20 | 10.81% | 2 | 20.00% |
eric dumazet | eric dumazet | 10 | 5.41% | 2 | 20.00% |
hong zhi guo | hong zhi guo | 3 | 1.62% | 1 | 10.00% |
patrick mchardy | patrick mchardy | 2 | 1.08% | 1 | 10.00% |
thomas goff | thomas goff | 1 | 0.54% | 1 | 10.00% |
| Total | 185 | 100.00% | 10 | 100.00% |
/* Main classifier routine: scans classifier chain attached
* to this qdisc, (optionally) tests for protocol and asks
* specific classifiers.
*/
int tc_classify(struct sk_buff *skb, const struct tcf_proto *tp,
struct tcf_result *res, bool compat_mode)
{
__be16 protocol = tc_skb_protocol(skb);
#ifdef CONFIG_NET_CLS_ACT
const struct tcf_proto *old_tp = tp;
int limit = 0;
reclassify:
#endif
for (; tp; tp = rcu_dereference_bh(tp->next)) {
int err;
if (tp->protocol != protocol &&
tp->protocol != htons(ETH_P_ALL))
continue;
err = tp->classify(skb, tp, res);
#ifdef CONFIG_NET_CLS_ACT
if (unlikely(err == TC_ACT_RECLASSIFY && !compat_mode))
goto reset;
#endif
if (err >= 0)
return err;
}
return TC_ACT_UNSPEC; /* signal: continue lookup */
#ifdef CONFIG_NET_CLS_ACT
reset:
if (unlikely(limit++ >= MAX_REC_LOOP)) {
net_notice_ratelimited("%s: reclassify loop, rule prio %u, protocol %02x\n",
tp->q->ops->id, tp->prio & 0xffff,
ntohs(tp->protocol));
return TC_ACT_SHOT;
}
tp = old_tp;
protocol = tc_skb_protocol(skb);
goto reclassify;
#endif
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
thomas graf | thomas graf | 93 | 47.21% | 1 | 6.67% |
daniel borkmann | daniel borkmann | 51 | 25.89% | 2 | 13.33% |
patrick mchardy | patrick mchardy | 13 | 6.60% | 1 | 6.67% |
eric dumazet | eric dumazet | 10 | 5.08% | 2 | 13.33% |
jamal hadi salim | jamal hadi salim | 9 | 4.57% | 2 | 13.33% |
stephen hemminger | stephen hemminger | 8 | 4.06% | 1 | 6.67% |
florian westphal | florian westphal | 4 | 2.03% | 1 | 6.67% |
john fastabend | john fastabend | 3 | 1.52% | 1 | 6.67% |
jiri pirko | jiri pirko | 3 | 1.52% | 1 | 6.67% |
joe perches | joe perches | 1 | 0.51% | 1 | 6.67% |
hideaki yoshifuji | hideaki yoshifuji | 1 | 0.51% | 1 | 6.67% |
al viro | al viro | 1 | 0.51% | 1 | 6.67% |
| Total | 197 | 100.00% | 15 | 100.00% |
EXPORT_SYMBOL(tc_classify);
bool tcf_destroy(struct tcf_proto *tp, bool force)
{
if (tp->ops->destroy(tp, force)) {
module_put(tp->ops->owner);
kfree_rcu(tp, rcu);
return true;
}
return false;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 30 | 60.00% | 1 | 33.33% |
cong wang | cong wang | 17 | 34.00% | 1 | 33.33% |
john fastabend | john fastabend | 3 | 6.00% | 1 | 33.33% |
| Total | 50 | 100.00% | 3 | 100.00% |
void tcf_destroy_chain(struct tcf_proto __rcu **fl)
{
struct tcf_proto *tp;
while ((tp = rtnl_dereference(*fl)) != NULL) {
RCU_INIT_POINTER(*fl, tp->next);
tcf_destroy(tp, true);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 40 | 80.00% | 2 | 50.00% |
john fastabend | john fastabend | 8 | 16.00% | 1 | 25.00% |
cong wang | cong wang | 2 | 4.00% | 1 | 25.00% |
| Total | 50 | 100.00% | 4 | 100.00% |
EXPORT_SYMBOL(tcf_destroy_chain);
#ifdef CONFIG_PROC_FS
static int psched_show(struct seq_file *seq, void *v)
{
seq_printf(seq, "%08x %08x %08x %08x\n",
(u32)NSEC_PER_USEC, (u32)PSCHED_TICKS2NS(1),
1000000,
(u32)NSEC_PER_SEC / hrtimer_resolution);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pre-git | pre-git | 20 | 42.55% | 2 | 28.57% |
patrick mchardy | patrick mchardy | 15 | 31.91% | 2 | 28.57% |
stephen hemminger | stephen hemminger | 10 | 21.28% | 1 | 14.29% |
jarek poplawski | jarek poplawski | 1 | 2.13% | 1 | 14.29% |
thomas gleixner | thomas gleixner | 1 | 2.13% | 1 | 14.29% |
| Total | 47 | 100.00% | 7 | 100.00% |
static int psched_open(struct inode *inode, struct file *file)
{
return single_open(file, psched_show, NULL);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
stephen hemminger | stephen hemminger | 22 | 84.62% | 1 | 33.33% |
pre-git | pre-git | 3 | 11.54% | 1 | 33.33% |
thomas goff | thomas goff | 1 | 3.85% | 1 | 33.33% |
| Total | 26 | 100.00% | 3 | 100.00% |
static const struct file_operations psched_fops = {
.owner = THIS_MODULE,
.open = psched_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int __net_init psched_net_init(struct net *net)
{
struct proc_dir_entry *e;
e = proc_create("psched", 0, net->proc_net, &psched_fops);
if (e == NULL)
return -ENOMEM;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
thomas goff | thomas goff | 41 | 89.13% | 1 | 50.00% |
gao feng | gao feng | 5 | 10.87% | 1 | 50.00% |
| Total | 46 | 100.00% | 2 | 100.00% |
static void __net_exit psched_net_exit(struct net *net)
{
remove_proc_entry("psched", net->proc_net);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
thomas goff | thomas goff | 16 | 76.19% | 1 | 50.00% |
gao feng | gao feng | 5 | 23.81% | 1 | 50.00% |
| Total | 21 | 100.00% | 2 | 100.00% |
#else
static int __net_init psched_net_init(struct net *net)
{
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
thomas goff | thomas goff | 15 | 100.00% | 1 | 100.00% |
| Total | 15 | 100.00% | 1 | 100.00% |
static void __net_exit psched_net_exit(struct net *net)
{
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
thomas goff | thomas goff | 11 | 100.00% | 1 | 100.00% |
| Total | 11 | 100.00% | 1 | 100.00% |
#endif
static struct pernet_operations psched_net_ops = {
.init = psched_net_init,
.exit = psched_net_exit,
};
static int __init pktsched_init(void)
{
int err;
err = register_pernet_subsys(&psched_net_ops);
if (err) {
pr_err("pktsched_init: "
"cannot initialize per netns operations\n");
return err;
}
register_qdisc(&pfifo_fast_ops);
register_qdisc(&pfifo_qdisc_ops);
register_qdisc(&bfifo_qdisc_ops);
register_qdisc(&pfifo_head_drop_qdisc_ops);
register_qdisc(&mq_qdisc_ops);
register_qdisc(&noqueue_qdisc_ops);
rtnl_register(PF_UNSPEC, RTM_NEWQDISC, tc_modify_qdisc, NULL, NULL);
rtnl_register(PF_UNSPEC, RTM_DELQDISC, tc_get_qdisc, NULL, NULL);
rtnl_register(PF_UNSPEC, RTM_GETQDISC, tc_get_qdisc, tc_dump_qdisc, NULL);
rtnl_register(PF_UNSPEC, RTM_NEWTCLASS, tc_ctl_tclass, NULL, NULL);
rtnl_register(PF_UNSPEC, RTM_DELTCLASS, tc_ctl_tclass, NULL, NULL);
rtnl_register(PF_UNSPEC, RTM_GETTCLASS, tc_ctl_tclass, tc_dump_tclass, NULL);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
thomas graf | thomas graf | 55 | 36.18% | 1 | 7.14% |
pre-git | pre-git | 34 | 22.37% | 5 | 35.71% |
thomas goff | thomas goff | 25 | 16.45% | 1 | 7.14% |
greg rose | greg rose | 12 | 7.89% | 1 | 7.14% |
phil sutter | phil sutter | 6 | 3.95% | 1 | 7.14% |
hagen paul pfeifer | hagen paul pfeifer | 6 | 3.95% | 1 | 7.14% |
stephen hemminger | stephen hemminger | 6 | 3.95% | 1 | 7.14% |
david s. miller | david s. miller | 6 | 3.95% | 1 | 7.14% |
eric dumazet | eric dumazet | 1 | 0.66% | 1 | 7.14% |
al viro | al viro | 1 | 0.66% | 1 | 7.14% |
| Total | 152 | 100.00% | 14 | 100.00% |
subsys_initcall(pktsched_init);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pre-git | pre-git | 3701 | 39.34% | 10 | 5.88% |
patrick mchardy | patrick mchardy | 1286 | 13.67% | 26 | 15.29% |
david s. miller | david s. miller | 1036 | 11.01% | 20 | 11.76% |
jussi kivilinna | jussi kivilinna | 801 | 8.51% | 1 | 0.59% |
eric dumazet | eric dumazet | 474 | 5.04% | 23 | 13.53% |
jarek poplawski | jarek poplawski | 406 | 4.32% | 16 | 9.41% |
thomas graf | thomas graf | 365 | 3.88% | 10 | 5.88% |
stephen hemminger | stephen hemminger | 295 | 3.14% | 5 | 2.94% |
thomas goff | thomas goff | 186 | 1.98% | 2 | 1.18% |
jesper dangaard brouer | jesper dangaard brouer | 165 | 1.75% | 1 | 0.59% |
john fastabend | john fastabend | 140 | 1.49% | 6 | 3.53% |
hong zhi guo | hong zhi guo | 96 | 1.02% | 2 | 1.18% |
eric w. biederman | eric w. biederman | 85 | 0.90% | 5 | 2.94% |
catalin boie | catalin boie | 66 | 0.70% | 1 | 0.59% |
daniel borkmann | daniel borkmann | 51 | 0.54% | 2 | 1.18% |
americo wang | americo wang | 42 | 0.45% | 2 | 1.18% |
denis v. lunev | denis v. lunev | 40 | 0.43% | 2 | 1.18% |
arnaldo carvalho de melo | arnaldo carvalho de melo | 34 | 0.36% | 3 | 1.76% |
cong wang | cong wang | 19 | 0.20% | 1 | 0.59% |
jamal hadi salim | jamal hadi salim | 16 | 0.17% | 4 | 2.35% |
greg rose | greg rose | 12 | 0.13% | 1 | 0.59% |
stephane graber | stephane graber | 12 | 0.13% | 1 | 0.59% |
gao feng | gao feng | 10 | 0.11% | 2 | 1.18% |
hideaki yoshifuji | hideaki yoshifuji | 10 | 0.11% | 2 | 1.18% |
al viro | al viro | 7 | 0.07% | 2 | 1.18% |
phil sutter | phil sutter | 6 | 0.06% | 1 | 0.59% |
hagen paul pfeifer | hagen paul pfeifer | 6 | 0.06% | 1 | 0.59% |
jiri pirko | jiri pirko | 6 | 0.06% | 2 | 1.18% |
pavel emelianov | pavel emelianov | 6 | 0.06% | 1 | 0.59% |
thomas gleixner | thomas gleixner | 5 | 0.05% | 2 | 1.18% |
florian westphal | florian westphal | 5 | 0.05% | 2 | 1.18% |
adrian bunk | adrian bunk | 5 | 0.05% | 2 | 1.18% |
nicolas dichtel | nicolas dichtel | 4 | 0.04% | 1 | 0.59% |
tejun heo | tejun heo | 3 | 0.03% | 1 | 0.59% |
zhi yong wu | zhi yong wu | 1 | 0.01% | 1 | 0.59% |
joe perches | joe perches | 1 | 0.01% | 1 | 0.59% |
arjan van de ven | arjan van de ven | 1 | 0.01% | 1 | 0.59% |
sabrina dubroca | sabrina dubroca | 1 | 0.01% | 1 | 0.59% |
johannes berg | johannes berg | 1 | 0.01% | 1 | 0.59% |
linus torvalds | linus torvalds | 1 | 0.01% | 1 | 0.59% |
hannes eder | hannes eder | 1 | 0.01% | 1 | 0.59% |
| Total | 9408 | 100.00% | 170 | 100.00% |
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