Release 4.11 net/sched/sch_atm.c
/* net/sched/sch_atm.c - ATM VC selection "queueing discipline" */
/* Written 1998-2000 by Werner Almesberger, EPFL ICA */
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/skbuff.h>
#include <linux/atmdev.h>
#include <linux/atmclip.h>
#include <linux/rtnetlink.h>
#include <linux/file.h> /* for fput */
#include <net/netlink.h>
#include <net/pkt_sched.h>
#include <net/pkt_cls.h>
/*
* The ATM queuing discipline provides a framework for invoking classifiers
* (aka "filters"), which in turn select classes of this queuing discipline.
* Each class maps the flow(s) it is handling to a given VC. Multiple classes
* may share the same VC.
*
* When creating a class, VCs are specified by passing the number of the open
* socket descriptor by which the calling process references the VC. The kernel
* keeps the VC open at least until all classes using it are removed.
*
* In this file, most functions are named atm_tc_* to avoid confusion with all
* the atm_* in net/atm. This naming convention differs from what's used in the
* rest of net/sched.
*
* Known bugs:
* - sometimes messes up the IP stack
* - any manipulations besides the few operations described in the README, are
* untested and likely to crash the system
* - should lock the flow while there is data in the queue (?)
*/
#define VCC2FLOW(vcc) ((struct atm_flow_data *) ((vcc)->user_back))
struct atm_flow_data {
struct Qdisc *q; /* FIFO, TBF, etc. */
struct tcf_proto __rcu *filter_list;
struct atm_vcc *vcc; /* VCC; NULL if VCC is closed */
void (*old_pop)(struct atm_vcc *vcc,
struct sk_buff *skb); /* chaining */
struct atm_qdisc_data *parent; /* parent qdisc */
struct socket *sock; /* for closing */
u32 classid; /* x:y type ID */
int ref; /* reference count */
struct gnet_stats_basic_packed bstats;
struct gnet_stats_queue qstats;
struct list_head list;
struct atm_flow_data *excess; /* flow for excess traffic;
NULL to set CLP instead */
int hdr_len;
unsigned char hdr[0]; /* header data; MUST BE LAST */
};
struct atm_qdisc_data {
struct atm_flow_data link; /* unclassified skbs go here */
struct list_head flows; /* NB: "link" is also on this
list */
struct tasklet_struct task; /* dequeue tasklet */
};
/* ------------------------- Class/flow operations ------------------------- */
static inline struct atm_flow_data *lookup_flow(struct Qdisc *sch, u32 classid)
{
struct atm_qdisc_data *p = qdisc_priv(sch);
struct atm_flow_data *flow;
list_for_each_entry(flow, &p->flows, list) {
if (flow->classid == classid)
return flow;
}
return NULL;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Patrick McHardy | 21 | 37.50% | 1 | 20.00% |
David S. Miller | 18 | 32.14% | 2 | 40.00% |
Linus Torvalds (pre-git) | 16 | 28.57% | 1 | 20.00% |
Stephen Hemminger | 1 | 1.79% | 1 | 20.00% |
Total | 56 | 100.00% | 5 | 100.00% |
static int atm_tc_graft(struct Qdisc *sch, unsigned long arg,
struct Qdisc *new, struct Qdisc **old)
{
struct atm_qdisc_data *p = qdisc_priv(sch);
struct atm_flow_data *flow = (struct atm_flow_data *)arg;
pr_debug("atm_tc_graft(sch %p,[qdisc %p],flow %p,new %p,old %p)\n",
sch, p, flow, new, old);
if (list_empty(&flow->list))
return -EINVAL;
if (!new)
new = &noop_qdisc;
*old = flow->q;
flow->q = new;
if (*old)
qdisc_reset(*old);
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 102 | 89.47% | 1 | 20.00% |
Patrick McHardy | 6 | 5.26% | 2 | 40.00% |
David S. Miller | 4 | 3.51% | 1 | 20.00% |
Stephen Hemminger | 2 | 1.75% | 1 | 20.00% |
Total | 114 | 100.00% | 5 | 100.00% |
static struct Qdisc *atm_tc_leaf(struct Qdisc *sch, unsigned long cl)
{
struct atm_flow_data *flow = (struct atm_flow_data *)cl;
pr_debug("atm_tc_leaf(sch %p,flow %p)\n", sch, flow);
return flow ? flow->q : NULL;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 46 | 97.87% | 1 | 50.00% |
Stephen Hemminger | 1 | 2.13% | 1 | 50.00% |
Total | 47 | 100.00% | 2 | 100.00% |
static unsigned long atm_tc_get(struct Qdisc *sch, u32 classid)
{
struct atm_qdisc_data *p __maybe_unused = qdisc_priv(sch);
struct atm_flow_data *flow;
pr_debug("atm_tc_get(sch %p,[qdisc %p],classid %x)\n", sch, p, classid);
flow = lookup_flow(sch, classid);
if (flow)
flow->ref++;
pr_debug("atm_tc_get: flow %p\n", flow);
return (unsigned long)flow;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 70 | 94.59% | 1 | 33.33% |
Stephen Hemminger | 3 | 4.05% | 1 | 33.33% |
Patrick McHardy | 1 | 1.35% | 1 | 33.33% |
Total | 74 | 100.00% | 3 | 100.00% |
static unsigned long atm_tc_bind_filter(struct Qdisc *sch,
unsigned long parent, u32 classid)
{
return atm_tc_get(sch, classid);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 27 | 100.00% | 1 | 100.00% |
Total | 27 | 100.00% | 1 | 100.00% |
/*
* atm_tc_put handles all destructions, including the ones that are explicitly
* requested (atm_tc_destroy, etc.). The assumption here is that we never drop
* anything that still seems to be in use.
*/
static void atm_tc_put(struct Qdisc *sch, unsigned long cl)
{
struct atm_qdisc_data *p = qdisc_priv(sch);
struct atm_flow_data *flow = (struct atm_flow_data *)cl;
pr_debug("atm_tc_put(sch %p,[qdisc %p],flow %p)\n", sch, p, flow);
if (--flow->ref)
return;
pr_debug("atm_tc_put: destroying\n");
list_del_init(&flow->list);
pr_debug("atm_tc_put: qdisc %p\n", flow->q);
qdisc_destroy(flow->q);
tcf_destroy_chain(&flow->filter_list);
if (flow->sock) {
pr_debug("atm_tc_put: f_count %ld\n",
file_count(flow->sock->file));
flow->vcc->pop = flow->old_pop;
sockfd_put(flow->sock);
}
if (flow->excess)
atm_tc_put(sch, (unsigned long)flow->excess);
if (flow != &p->link)
kfree(flow);
/*
* If flow == &p->link, the qdisc no longer works at this point and
* needs to be removed. (By the caller of atm_tc_put.)
*/
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 152 | 91.57% | 2 | 28.57% |
Stephen Hemminger | 5 | 3.01% | 1 | 14.29% |
David S. Miller | 4 | 2.41% | 1 | 14.29% |
Patrick McHardy | 4 | 2.41% | 2 | 28.57% |
Al Viro | 1 | 0.60% | 1 | 14.29% |
Total | 166 | 100.00% | 7 | 100.00% |
static void sch_atm_pop(struct atm_vcc *vcc, struct sk_buff *skb)
{
struct atm_qdisc_data *p = VCC2FLOW(vcc)->parent;
pr_debug("sch_atm_pop(vcc %p,skb %p,[qdisc %p])\n", vcc, skb, p);
VCC2FLOW(vcc)->old_pop(vcc, skb);
tasklet_schedule(&p->task);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 58 | 98.31% | 2 | 66.67% |
Stephen Hemminger | 1 | 1.69% | 1 | 33.33% |
Total | 59 | 100.00% | 3 | 100.00% |
static const u8 llc_oui_ip[] = {
0xaa, /* DSAP: non-ISO */
0xaa, /* SSAP: non-ISO */
0x03, /* Ctrl: Unnumbered Information Command PDU */
0x00, /* OUI: EtherType */
0x00, 0x00,
0x08, 0x00
}; /* Ethertype IP (0800) */
static const struct nla_policy atm_policy[TCA_ATM_MAX + 1] = {
[TCA_ATM_FD] = { .type = NLA_U32 },
[TCA_ATM_EXCESS] = { .type = NLA_U32 },
};
static int atm_tc_change(struct Qdisc *sch, u32 classid, u32 parent,
struct nlattr **tca, unsigned long *arg)
{
struct atm_qdisc_data *p = qdisc_priv(sch);
struct atm_flow_data *flow = (struct atm_flow_data *)*arg;
struct atm_flow_data *excess = NULL;
struct nlattr *opt = tca[TCA_OPTIONS];
struct nlattr *tb[TCA_ATM_MAX + 1];
struct socket *sock;
int fd, error, hdr_len;
void *hdr;
pr_debug("atm_tc_change(sch %p,[qdisc %p],classid %x,parent %x,"
"flow %p,opt %p)\n", sch, p, classid, parent, flow, opt);
/*
* The concept of parents doesn't apply for this qdisc.
*/
if (parent && parent != TC_H_ROOT && parent != sch->handle)
return -EINVAL;
/*
* ATM classes cannot be changed. In order to change properties of the
* ATM connection, that socket needs to be modified directly (via the
* native ATM API. In order to send a flow to a different VC, the old
* class needs to be removed and a new one added. (This may be changed
* later.)
*/
if (flow)
return -EBUSY;
if (opt == NULL)
return -EINVAL;
error = nla_parse_nested(tb, TCA_ATM_MAX, opt, atm_policy);
if (error < 0)
return error;
if (!tb[TCA_ATM_FD])
return -EINVAL;
fd = nla_get_u32(tb[TCA_ATM_FD]);
pr_debug("atm_tc_change: fd %d\n", fd);
if (tb[TCA_ATM_HDR]) {
hdr_len = nla_len(tb[TCA_ATM_HDR]);
hdr = nla_data(tb[TCA_ATM_HDR]);
} else {
hdr_len = RFC1483LLC_LEN;
hdr = NULL; /* default LLC/SNAP for IP */
}
if (!tb[TCA_ATM_EXCESS])
excess = NULL;
else {
excess = (struct atm_flow_data *)
atm_tc_get(sch, nla_get_u32(tb[TCA_ATM_EXCESS]));
if (!excess)
return -ENOENT;
}
pr_debug("atm_tc_change: type %d, payload %d, hdr_len %d\n",
opt->nla_type, nla_len(opt), hdr_len);
sock = sockfd_lookup(fd, &error);
if (!sock)
return error; /* f_count++ */
pr_debug("atm_tc_change: f_count %ld\n", file_count(sock->file));
if (sock->ops->family != PF_ATMSVC && sock->ops->family != PF_ATMPVC) {
error = -EPROTOTYPE;
goto err_out;
}
/* @@@ should check if the socket is really operational or we'll crash
on vcc->send */
if (classid) {
if (TC_H_MAJ(classid ^ sch->handle)) {
pr_debug("atm_tc_change: classid mismatch\n");
error = -EINVAL;
goto err_out;
}
} else {
int i;
unsigned long cl;
for (i = 1; i < 0x8000; i++) {
classid = TC_H_MAKE(sch->handle, 0x8000 | i);
cl = atm_tc_get(sch, classid);
if (!cl)
break;
atm_tc_put(sch, cl);
}
}
pr_debug("atm_tc_change: new id %x\n", classid);
flow = kzalloc(sizeof(struct atm_flow_data) + hdr_len, GFP_KERNEL);
pr_debug("atm_tc_change: flow %p\n", flow);
if (!flow) {
error = -ENOBUFS;
goto err_out;
}
RCU_INIT_POINTER(flow->filter_list, NULL);
flow->q = qdisc_create_dflt(sch->dev_queue, &pfifo_qdisc_ops, classid);
if (!flow->q)
flow->q = &noop_qdisc;
pr_debug("atm_tc_change: qdisc %p\n", flow->q);
flow->sock = sock;
flow->vcc = ATM_SD(sock); /* speedup */
flow->vcc->user_back = flow;
pr_debug("atm_tc_change: vcc %p\n", flow->vcc);
flow->old_pop = flow->vcc->pop;
flow->parent = p;
flow->vcc->pop = sch_atm_pop;
flow->classid = classid;
flow->ref = 1;
flow->excess = excess;
list_add(&flow->list, &p->link.list);
flow->hdr_len = hdr_len;
if (hdr)
memcpy(flow->hdr, hdr, hdr_len);
else
memcpy(flow->hdr, llc_oui_ip, sizeof(llc_oui_ip));
*arg = (unsigned long)flow;
return 0;
err_out:
if (excess)
atm_tc_put(sch, (unsigned long)excess);
sockfd_put(sock);
return error;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 631 | 89.00% | 4 | 23.53% |
Patrick McHardy | 31 | 4.37% | 6 | 35.29% |
Stephen Hemminger | 27 | 3.81% | 1 | 5.88% |
David S. Miller | 12 | 1.69% | 2 | 11.76% |
John Fastabend | 4 | 0.56% | 1 | 5.88% |
Chas Williams | 2 | 0.28% | 1 | 5.88% |
Vignesh Babu | 1 | 0.14% | 1 | 5.88% |
Al Viro | 1 | 0.14% | 1 | 5.88% |
Total | 709 | 100.00% | 17 | 100.00% |
static int atm_tc_delete(struct Qdisc *sch, unsigned long arg)
{
struct atm_qdisc_data *p = qdisc_priv(sch);
struct atm_flow_data *flow = (struct atm_flow_data *)arg;
pr_debug("atm_tc_delete(sch %p,[qdisc %p],flow %p)\n", sch, p, flow);
if (list_empty(&flow->list))
return -EINVAL;
if (rcu_access_pointer(flow->filter_list) || flow == &p->link)
return -EBUSY;
/*
* Reference count must be 2: one for "keepalive" (set at class
* creation), and one for the reference held when calling delete.
*/
if (flow->ref < 2) {
pr_err("atm_tc_delete: flow->ref == %d\n", flow->ref);
return -EINVAL;
}
if (flow->ref > 2)
return -EBUSY; /* catch references via excess, etc. */
atm_tc_put(sch, arg);
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 118 | 91.47% | 1 | 16.67% |
David S. Miller | 4 | 3.10% | 1 | 16.67% |
John Fastabend | 3 | 2.33% | 1 | 16.67% |
Stephen Hemminger | 2 | 1.55% | 1 | 16.67% |
Eric Dumazet | 1 | 0.78% | 1 | 16.67% |
Patrick McHardy | 1 | 0.78% | 1 | 16.67% |
Total | 129 | 100.00% | 6 | 100.00% |
static void atm_tc_walk(struct Qdisc *sch, struct qdisc_walker *walker)
{
struct atm_qdisc_data *p = qdisc_priv(sch);
struct atm_flow_data *flow;
pr_debug("atm_tc_walk(sch %p,[qdisc %p],walker %p)\n", sch, p, walker);
if (walker->stop)
return;
list_for_each_entry(flow, &p->flows, list) {
if (walker->count >= walker->skip &&
walker->fn(sch, (unsigned long)flow, walker) < 0) {
walker->stop = 1;
break;
}
walker->count++;
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 89 | 89.00% | 1 | 33.33% |
David S. Miller | 9 | 9.00% | 1 | 33.33% |
Stephen Hemminger | 2 | 2.00% | 1 | 33.33% |
Total | 100 | 100.00% | 3 | 100.00% |
static struct tcf_proto __rcu **atm_tc_find_tcf(struct Qdisc *sch,
unsigned long cl)
{
struct atm_qdisc_data *p = qdisc_priv(sch);
struct atm_flow_data *flow = (struct atm_flow_data *)cl;
pr_debug("atm_tc_find_tcf(sch %p,[qdisc %p],flow %p)\n", sch, p, flow);
return flow ? &flow->filter_list : &p->link.filter_list;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 64 | 95.52% | 1 | 33.33% |
Stephen Hemminger | 2 | 2.99% | 1 | 33.33% |
John Fastabend | 1 | 1.49% | 1 | 33.33% |
Total | 67 | 100.00% | 3 | 100.00% |
/* --------------------------- Qdisc operations ---------------------------- */
static int atm_tc_enqueue(struct sk_buff *skb, struct Qdisc *sch,
struct sk_buff **to_free)
{
struct atm_qdisc_data *p = qdisc_priv(sch);
struct atm_flow_data *flow;
struct tcf_result res;
int result;
int ret = NET_XMIT_SUCCESS | __NET_XMIT_BYPASS;
pr_debug("atm_tc_enqueue(skb %p,sch %p,[qdisc %p])\n", skb, sch, p);
result = TC_ACT_OK; /* be nice to gcc */
flow = NULL;
if (TC_H_MAJ(skb->priority) != sch->handle ||
!(flow = (struct atm_flow_data *)atm_tc_get(sch, skb->priority))) {
struct tcf_proto *fl;
list_for_each_entry(flow, &p->flows, list) {
fl = rcu_dereference_bh(flow->filter_list);
if (fl) {
result = tc_classify(skb, fl, &res, true);
if (result < 0)
continue;
flow = (struct atm_flow_data *)res.class;
if (!flow)
flow = lookup_flow(sch, res.classid);
goto done;
}
}
flow = NULL;
done:
;
}
if (!flow) {
flow = &p->link;
} else {
if (flow->vcc)
ATM_SKB(skb)->atm_options = flow->vcc->atm_options;
/*@@@ looks good ... but it's not supposed to work :-) */
#ifdef CONFIG_NET_CLS_ACT
switch (result) {
case TC_ACT_QUEUED:
case TC_ACT_STOLEN:
__qdisc_drop(skb, to_free);
return NET_XMIT_SUCCESS | __NET_XMIT_STOLEN;
case TC_ACT_SHOT:
__qdisc_drop(skb, to_free);
goto drop;
case TC_ACT_RECLASSIFY:
if (flow->excess)
flow = flow->excess;
else
ATM_SKB(skb)->atm_options |= ATM_ATMOPT_CLP;
break;
}
#endif
}
ret = qdisc_enqueue(skb, flow->q, to_free);
if (ret != NET_XMIT_SUCCESS) {
drop: __maybe_unused
if (net_xmit_drop_count(ret)) {
qdisc_qstats_drop(sch);
if (flow)
flow->qstats.drops++;
}
return ret;
}
/*
* Okay, this may seem weird. We pretend we've dropped the packet if
* it goes via ATM. The reason for this is that the outer qdisc
* expects to be able to q->dequeue the packet later on if we return
* success at this place. Also, sch->q.qdisc needs to reflect whether
* there is a packet egligible for dequeuing or not. Note that the
* statistics of the outer qdisc are necessarily wrong because of all
* this. There's currently no correct solution for this.
*/
if (flow == &p->link) {
sch->q.qlen++;
return NET_XMIT_SUCCESS;
}
tasklet_schedule(&p->task);
return NET_XMIT_SUCCESS | __NET_XMIT_BYPASS;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 234 | 60.78% | 2 | 10.53% |
Patrick McHardy | 59 | 15.32% | 3 | 15.79% |
David S. Miller | 26 | 6.75% | 1 | 5.26% |
John Fastabend | 18 | 4.68% | 2 | 10.53% |
Eric Dumazet | 16 | 4.16% | 2 | 10.53% |
Jarek Poplawski | 14 | 3.64% | 2 | 10.53% |
Stephen Hemminger | 6 | 1.56% | 1 | 5.26% |
Daniel Borkmann | 3 | 0.78% | 1 | 5.26% |
Florian Westphal | 3 | 0.78% | 1 | 5.26% |
Ben Greear | 2 | 0.52% | 1 | 5.26% |
Américo Wang | 2 | 0.52% | 1 | 5.26% |
Jussi Kivilinna | 1 | 0.26% | 1 | 5.26% |
Thomas Graf | 1 | 0.26% | 1 | 5.26% |
Total | 385 | 100.00% | 19 | 100.00% |
/*
* Dequeue packets and send them over ATM. Note that we quite deliberately
* avoid checking net_device's flow control here, simply because sch_atm
* uses its own channels, which have nothing to do with any CLIP/LANE/or
* non-ATM interfaces.
*/
static void sch_atm_dequeue(unsigned long data)
{
struct Qdisc *sch = (struct Qdisc *)data;
struct atm_qdisc_data *p = qdisc_priv(sch);
struct atm_flow_data *flow;
struct sk_buff *skb;
pr_debug("sch_atm_dequeue(sch %p,[qdisc %p])\n", sch, p);
list_for_each_entry(flow, &p->flows, list) {
if (flow == &p->link)
continue;
/*
* If traffic is properly shaped, this won't generate nasty
* little bursts. Otherwise, it may ... (but that's okay)
*/
while ((skb = flow->q->ops->peek(flow->q))) {
if (!atm_may_send(flow->vcc, skb->truesize))
break;
skb = qdisc_dequeue_peeked(flow->q);
if (unlikely(!skb))
break;
qdisc_bstats_update(sch, skb);
bstats_update(&flow->bstats, skb);
pr_debug("atm_tc_dequeue: sending on class %p\n", flow);
/* remove any LL header somebody else has attached */
skb_pull(skb, skb_network_offset(skb));
if (skb_headroom(skb) < flow->hdr_len) {
struct sk_buff *new;
new = skb_realloc_headroom(skb, flow->hdr_len);
dev_kfree_skb(skb);
if (!new)
continue;
skb = new;
}
pr_debug("sch_atm_dequeue: ip %p, data %p\n",
skb_network_header(skb), skb->data);
ATM_SKB(skb)->vcc = flow->vcc;
memcpy(skb_push(skb, flow->hdr_len), flow->hdr,
flow->hdr_len);
atomic_add(skb->truesize,
&sk_atm(flow->vcc)->sk_wmem_alloc);
/* atm.atm_options are already set by atm_tc_enqueue */
flow->vcc->send(flow->vcc, skb);
}
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 217 | 77.22% | 3 | 23.08% |
Eric Dumazet | 17 | 6.05% | 1 | 7.69% |
David S. Miller | 16 | 5.69% | 1 | 7.69% |
Jarek Poplawski | 15 | 5.34% | 2 | 15.38% |
Arnaldo Carvalho de Melo | 10 | 3.56% | 3 | 23.08% |
Stephen Hemminger | 4 | 1.42% | 1 | 7.69% |
Chas Williams | 1 | 0.36% | 1 | 7.69% |
Steven Cole | 1 | 0.36% | 1 | 7.69% |
Total | 281 | 100.00% | 13 | 100.00% |
static struct sk_buff *atm_tc_dequeue(struct Qdisc *sch)
{
struct atm_qdisc_data *p = qdisc_priv(sch);
struct sk_buff *skb;
pr_debug("atm_tc_dequeue(sch %p,[qdisc %p])\n", sch, p);
tasklet_schedule(&p->task);
skb = qdisc_dequeue_peeked(p->link.q);
if (skb)
sch->q.qlen--;
return skb;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 67 | 95.71% | 2 | 50.00% |
Stephen Hemminger | 2 | 2.86% | 1 | 25.00% |
Jarek Poplawski | 1 | 1.43% | 1 | 25.00% |
Total | 70 | 100.00% | 4 | 100.00% |
static struct sk_buff *atm_tc_peek(struct Qdisc *sch)
{
struct atm_qdisc_data *p = qdisc_priv(sch);
pr_debug("atm_tc_peek(sch %p,[qdisc %p])\n", sch, p);
return p->link.q->ops->peek(p->link.q);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jarek Poplawski | 50 | 100.00% | 1 | 100.00% |
Total | 50 | 100.00% | 1 | 100.00% |
static int atm_tc_init(struct Qdisc *sch, struct nlattr *opt)
{
struct atm_qdisc_data *p = qdisc_priv(sch);
pr_debug("atm_tc_init(sch %p,[qdisc %p],opt %p)\n", sch, p, opt);
INIT_LIST_HEAD(&p->flows);
INIT_LIST_HEAD(&p->link.list);
list_add(&p->link.list, &p->flows);
p->link.q = qdisc_create_dflt(sch->dev_queue,
&pfifo_qdisc_ops, sch->handle);
if (!p->link.q)
p->link.q = &noop_qdisc;
pr_debug("atm_tc_init: link (%p) qdisc %p\n", &p->link, p->link.q);
RCU_INIT_POINTER(p->link.filter_list, NULL);
p->link.vcc = NULL;
p->link.sock = NULL;
p->link.classid = sch->handle;
p->link.ref = 1;
tasklet_init(&p->task, sch_atm_dequeue, (unsigned long)sch);
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 138 | 73.40% | 2 | 25.00% |
David S. Miller | 29 | 15.43% | 2 | 25.00% |
Stephen Hemminger | 12 | 6.38% | 1 | 12.50% |
Patrick McHardy | 5 | 2.66% | 2 | 25.00% |
John Fastabend | 4 | 2.13% | 1 | 12.50% |
Total | 188 | 100.00% | 8 | 100.00% |
static void atm_tc_reset(struct Qdisc *sch)
{
struct atm_qdisc_data *p = qdisc_priv(sch);
struct atm_flow_data *flow;
pr_debug("atm_tc_reset(sch %p,[qdisc %p])\n", sch, p);
list_for_each_entry(flow, &p->flows, list)
qdisc_reset(flow->q);
sch->q.qlen = 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 48 | 82.76% | 1 | 33.33% |
David S. Miller | 8 | 13.79% | 1 | 33.33% |
Stephen Hemminger | 2 | 3.45% | 1 | 33.33% |
Total | 58 | 100.00% | 3 | 100.00% |
static void atm_tc_destroy(struct Qdisc *sch)
{
struct atm_qdisc_data *p = qdisc_priv(sch);
struct atm_flow_data *flow, *tmp;
pr_debug("atm_tc_destroy(sch %p,[qdisc %p])\n", sch, p);
list_for_each_entry(flow, &p->flows, list)
tcf_destroy_chain(&flow->filter_list);
list_for_each_entry_safe(flow, tmp, &p->flows, list) {
if (flow->ref > 1)
pr_err("atm_destroy: %p->ref = %d\n", flow, flow->ref);
atm_tc_put(sch, (unsigned long)flow);
}
tasklet_kill(&p->task);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 75 | 72.12% | 2 | 25.00% |
David S. Miller | 21 | 20.19% | 1 | 12.50% |
Patrick McHardy | 5 | 4.81% | 3 | 37.50% |
Stephen Hemminger | 2 | 1.92% | 1 | 12.50% |
Eric Dumazet | 1 | 0.96% | 1 | 12.50% |
Total | 104 | 100.00% | 8 | 100.00% |
static int atm_tc_dump_class(struct Qdisc *sch, unsigned long cl,
struct sk_buff *skb, struct tcmsg *tcm)
{
struct atm_qdisc_data *p = qdisc_priv(sch);
struct atm_flow_data *flow = (struct atm_flow_data *)cl;
struct nlattr *nest;
pr_debug("atm_tc_dump_class(sch %p,[qdisc %p],flow %p,skb %p,tcm %p)\n",
sch, p, flow, skb, tcm);
if (list_empty(&flow->list))
return -EINVAL;
tcm->tcm_handle = flow->classid;
tcm->tcm_info = flow->q->handle;
nest = nla_nest_start(skb, TCA_OPTIONS);
if (nest == NULL)
goto nla_put_failure;
if (nla_put(skb, TCA_ATM_HDR, flow->hdr_len, flow->hdr))
goto nla_put_failure;
if (flow->vcc) {
struct sockaddr_atmpvc pvc;
int state;
memset(&pvc, 0, sizeof(pvc));
pvc.sap_family = AF_ATMPVC;
pvc.sap_addr.itf = flow->vcc->dev