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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* net/sched/sch_atm.c - ATM VC selection "queueing discipline" */
2
3/* Written 1998-2000 by Werner Almesberger, EPFL ICA */
4
Linus Torvalds1da177e2005-04-16 15:20:36 -07005#include <linux/module.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +09006#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07007#include <linux/init.h>
Alexey Dobriyana6b7a402011-06-06 10:43:46 +00008#include <linux/interrupt.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07009#include <linux/string.h>
10#include <linux/errno.h>
11#include <linux/skbuff.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#include <linux/atmdev.h>
13#include <linux/atmclip.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#include <linux/rtnetlink.h>
Patrick McHardyb0188d42007-07-15 00:01:25 -070015#include <linux/file.h> /* for fput */
Arnaldo Carvalho de Melodc5fc572007-03-25 23:06:12 -070016#include <net/netlink.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#include <net/pkt_sched.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018
Linus Torvalds1da177e2005-04-16 15:20:36 -070019/*
20 * The ATM queuing discipline provides a framework for invoking classifiers
21 * (aka "filters"), which in turn select classes of this queuing discipline.
22 * Each class maps the flow(s) it is handling to a given VC. Multiple classes
23 * may share the same VC.
24 *
25 * When creating a class, VCs are specified by passing the number of the open
26 * socket descriptor by which the calling process references the VC. The kernel
27 * keeps the VC open at least until all classes using it are removed.
28 *
29 * In this file, most functions are named atm_tc_* to avoid confusion with all
30 * the atm_* in net/atm. This naming convention differs from what's used in the
31 * rest of net/sched.
32 *
33 * Known bugs:
34 * - sometimes messes up the IP stack
35 * - any manipulations besides the few operations described in the README, are
36 * untested and likely to crash the system
37 * - should lock the flow while there is data in the queue (?)
38 */
39
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#define VCC2FLOW(vcc) ((struct atm_flow_data *) ((vcc)->user_back))
41
Linus Torvalds1da177e2005-04-16 15:20:36 -070042struct atm_flow_data {
Patrick McHardyb0188d42007-07-15 00:01:25 -070043 struct Qdisc *q; /* FIFO, TBF, etc. */
John Fastabend25d8c0d2014-09-12 20:05:27 -070044 struct tcf_proto __rcu *filter_list;
Patrick McHardyb0188d42007-07-15 00:01:25 -070045 struct atm_vcc *vcc; /* VCC; NULL if VCC is closed */
46 void (*old_pop)(struct atm_vcc *vcc,
Stephen Hemminger786a9032008-01-21 02:25:29 -080047 struct sk_buff *skb); /* chaining */
Linus Torvalds1da177e2005-04-16 15:20:36 -070048 struct atm_qdisc_data *parent; /* parent qdisc */
49 struct socket *sock; /* for closing */
50 u32 classid; /* x:y type ID */
51 int ref; /* reference count */
Eric Dumazetc1a8f1f2009-08-16 09:36:49 +000052 struct gnet_stats_basic_packed bstats;
Linus Torvalds1da177e2005-04-16 15:20:36 -070053 struct gnet_stats_queue qstats;
David S. Miller6accec72010-07-18 19:52:55 -070054 struct list_head list;
Linus Torvalds1da177e2005-04-16 15:20:36 -070055 struct atm_flow_data *excess; /* flow for excess traffic;
56 NULL to set CLP instead */
57 int hdr_len;
58 unsigned char hdr[0]; /* header data; MUST BE LAST */
59};
60
61struct atm_qdisc_data {
62 struct atm_flow_data link; /* unclassified skbs go here */
David S. Miller6accec72010-07-18 19:52:55 -070063 struct list_head flows; /* NB: "link" is also on this
Linus Torvalds1da177e2005-04-16 15:20:36 -070064 list */
Jarek Poplawskif30ab412008-11-13 22:56:30 -080065 struct tasklet_struct task; /* dequeue tasklet */
Linus Torvalds1da177e2005-04-16 15:20:36 -070066};
67
Linus Torvalds1da177e2005-04-16 15:20:36 -070068/* ------------------------- Class/flow operations ------------------------- */
69
Patrick McHardyb0188d42007-07-15 00:01:25 -070070static inline struct atm_flow_data *lookup_flow(struct Qdisc *sch, u32 classid)
Linus Torvalds1da177e2005-04-16 15:20:36 -070071{
Stephen Hemminger786a9032008-01-21 02:25:29 -080072 struct atm_qdisc_data *p = qdisc_priv(sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -070073 struct atm_flow_data *flow;
74
David S. Miller6accec72010-07-18 19:52:55 -070075 list_for_each_entry(flow, &p->flows, list) {
Patrick McHardyb0188d42007-07-15 00:01:25 -070076 if (flow->classid == classid)
David S. Miller6accec72010-07-18 19:52:55 -070077 return flow;
78 }
79 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070080}
81
Patrick McHardyb0188d42007-07-15 00:01:25 -070082static int atm_tc_graft(struct Qdisc *sch, unsigned long arg,
83 struct Qdisc *new, struct Qdisc **old)
Linus Torvalds1da177e2005-04-16 15:20:36 -070084{
Stephen Hemminger786a9032008-01-21 02:25:29 -080085 struct atm_qdisc_data *p = qdisc_priv(sch);
Patrick McHardyb0188d42007-07-15 00:01:25 -070086 struct atm_flow_data *flow = (struct atm_flow_data *)arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -070087
Stephen Hemminger786a9032008-01-21 02:25:29 -080088 pr_debug("atm_tc_graft(sch %p,[qdisc %p],flow %p,new %p,old %p)\n",
Patrick McHardyb0188d42007-07-15 00:01:25 -070089 sch, p, flow, new, old);
David S. Miller6accec72010-07-18 19:52:55 -070090 if (list_empty(&flow->list))
Patrick McHardyb0188d42007-07-15 00:01:25 -070091 return -EINVAL;
92 if (!new)
93 new = &noop_qdisc;
Patrick McHardyb94c8af2008-11-20 04:11:36 -080094 *old = flow->q;
95 flow->q = new;
Patrick McHardyb0188d42007-07-15 00:01:25 -070096 if (*old)
97 qdisc_reset(*old);
YOSHIFUJI Hideaki10297b92007-02-09 23:25:16 +090098 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070099}
100
Patrick McHardyb0188d42007-07-15 00:01:25 -0700101static struct Qdisc *atm_tc_leaf(struct Qdisc *sch, unsigned long cl)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102{
Patrick McHardyb0188d42007-07-15 00:01:25 -0700103 struct atm_flow_data *flow = (struct atm_flow_data *)cl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104
Stephen Hemminger786a9032008-01-21 02:25:29 -0800105 pr_debug("atm_tc_leaf(sch %p,flow %p)\n", sch, flow);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106 return flow ? flow->q : NULL;
107}
108
Patrick McHardyb0188d42007-07-15 00:01:25 -0700109static unsigned long atm_tc_get(struct Qdisc *sch, u32 classid)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800111 struct atm_qdisc_data *p __maybe_unused = qdisc_priv(sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112 struct atm_flow_data *flow;
113
Stephen Hemminger786a9032008-01-21 02:25:29 -0800114 pr_debug("atm_tc_get(sch %p,[qdisc %p],classid %x)\n", sch, p, classid);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700115 flow = lookup_flow(sch, classid);
116 if (flow)
117 flow->ref++;
Stephen Hemminger786a9032008-01-21 02:25:29 -0800118 pr_debug("atm_tc_get: flow %p\n", flow);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700119 return (unsigned long)flow;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120}
121
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122static unsigned long atm_tc_bind_filter(struct Qdisc *sch,
Patrick McHardyb0188d42007-07-15 00:01:25 -0700123 unsigned long parent, u32 classid)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124{
Patrick McHardyb0188d42007-07-15 00:01:25 -0700125 return atm_tc_get(sch, classid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126}
127
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128/*
129 * atm_tc_put handles all destructions, including the ones that are explicitly
130 * requested (atm_tc_destroy, etc.). The assumption here is that we never drop
131 * anything that still seems to be in use.
132 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133static void atm_tc_put(struct Qdisc *sch, unsigned long cl)
134{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800135 struct atm_qdisc_data *p = qdisc_priv(sch);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700136 struct atm_flow_data *flow = (struct atm_flow_data *)cl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137
Stephen Hemminger786a9032008-01-21 02:25:29 -0800138 pr_debug("atm_tc_put(sch %p,[qdisc %p],flow %p)\n", sch, p, flow);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700139 if (--flow->ref)
140 return;
Stephen Hemminger786a9032008-01-21 02:25:29 -0800141 pr_debug("atm_tc_put: destroying\n");
David S. Miller6accec72010-07-18 19:52:55 -0700142 list_del_init(&flow->list);
Stephen Hemminger786a9032008-01-21 02:25:29 -0800143 pr_debug("atm_tc_put: qdisc %p\n", flow->q);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 qdisc_destroy(flow->q);
Patrick McHardyff31ab52008-07-01 19:52:38 -0700145 tcf_destroy_chain(&flow->filter_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 if (flow->sock) {
Al Viro516e0cc2008-07-26 00:39:17 -0400147 pr_debug("atm_tc_put: f_count %ld\n",
Patrick McHardyb0188d42007-07-15 00:01:25 -0700148 file_count(flow->sock->file));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 flow->vcc->pop = flow->old_pop;
150 sockfd_put(flow->sock);
151 }
Patrick McHardyb0188d42007-07-15 00:01:25 -0700152 if (flow->excess)
153 atm_tc_put(sch, (unsigned long)flow->excess);
154 if (flow != &p->link)
155 kfree(flow);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 /*
157 * If flow == &p->link, the qdisc no longer works at this point and
158 * needs to be removed. (By the caller of atm_tc_put.)
159 */
160}
161
Patrick McHardyb0188d42007-07-15 00:01:25 -0700162static void sch_atm_pop(struct atm_vcc *vcc, struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163{
164 struct atm_qdisc_data *p = VCC2FLOW(vcc)->parent;
165
Stephen Hemminger786a9032008-01-21 02:25:29 -0800166 pr_debug("sch_atm_pop(vcc %p,skb %p,[qdisc %p])\n", vcc, skb, p);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700167 VCC2FLOW(vcc)->old_pop(vcc, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168 tasklet_schedule(&p->task);
169}
170
171static const u8 llc_oui_ip[] = {
Patrick McHardyb0188d42007-07-15 00:01:25 -0700172 0xaa, /* DSAP: non-ISO */
173 0xaa, /* SSAP: non-ISO */
174 0x03, /* Ctrl: Unnumbered Information Command PDU */
175 0x00, /* OUI: EtherType */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176 0x00, 0x00,
Patrick McHardyb0188d42007-07-15 00:01:25 -0700177 0x08, 0x00
178}; /* Ethertype IP (0800) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179
Patrick McHardy27a34212008-01-23 20:35:39 -0800180static const struct nla_policy atm_policy[TCA_ATM_MAX + 1] = {
181 [TCA_ATM_FD] = { .type = NLA_U32 },
182 [TCA_ATM_EXCESS] = { .type = NLA_U32 },
183};
184
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185static int atm_tc_change(struct Qdisc *sch, u32 classid, u32 parent,
Patrick McHardy1e904742008-01-22 22:11:17 -0800186 struct nlattr **tca, unsigned long *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800188 struct atm_qdisc_data *p = qdisc_priv(sch);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700189 struct atm_flow_data *flow = (struct atm_flow_data *)*arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 struct atm_flow_data *excess = NULL;
Patrick McHardy1e904742008-01-22 22:11:17 -0800191 struct nlattr *opt = tca[TCA_OPTIONS];
192 struct nlattr *tb[TCA_ATM_MAX + 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 struct socket *sock;
Patrick McHardyb0188d42007-07-15 00:01:25 -0700194 int fd, error, hdr_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 void *hdr;
196
Stephen Hemminger786a9032008-01-21 02:25:29 -0800197 pr_debug("atm_tc_change(sch %p,[qdisc %p],classid %x,parent %x,"
Patrick McHardyb0188d42007-07-15 00:01:25 -0700198 "flow %p,opt %p)\n", sch, p, classid, parent, flow, opt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 /*
200 * The concept of parents doesn't apply for this qdisc.
201 */
202 if (parent && parent != TC_H_ROOT && parent != sch->handle)
203 return -EINVAL;
204 /*
205 * ATM classes cannot be changed. In order to change properties of the
206 * ATM connection, that socket needs to be modified directly (via the
207 * native ATM API. In order to send a flow to a different VC, the old
208 * class needs to be removed and a new one added. (This may be changed
209 * later.)
210 */
Patrick McHardyb0188d42007-07-15 00:01:25 -0700211 if (flow)
212 return -EBUSY;
Patrick McHardycee63722008-01-23 20:33:32 -0800213 if (opt == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 return -EINVAL;
Patrick McHardy27a34212008-01-23 20:35:39 -0800215
216 error = nla_parse_nested(tb, TCA_ATM_MAX, opt, atm_policy);
Patrick McHardycee63722008-01-23 20:33:32 -0800217 if (error < 0)
218 return error;
219
Patrick McHardy27a34212008-01-23 20:35:39 -0800220 if (!tb[TCA_ATM_FD])
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 return -EINVAL;
Patrick McHardy1587bac2008-01-23 20:35:03 -0800222 fd = nla_get_u32(tb[TCA_ATM_FD]);
Stephen Hemminger786a9032008-01-21 02:25:29 -0800223 pr_debug("atm_tc_change: fd %d\n", fd);
Patrick McHardy1e904742008-01-22 22:11:17 -0800224 if (tb[TCA_ATM_HDR]) {
225 hdr_len = nla_len(tb[TCA_ATM_HDR]);
226 hdr = nla_data(tb[TCA_ATM_HDR]);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700227 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 hdr_len = RFC1483LLC_LEN;
Patrick McHardyb0188d42007-07-15 00:01:25 -0700229 hdr = NULL; /* default LLC/SNAP for IP */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 }
Patrick McHardy1e904742008-01-22 22:11:17 -0800231 if (!tb[TCA_ATM_EXCESS])
Patrick McHardyb0188d42007-07-15 00:01:25 -0700232 excess = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 else {
Patrick McHardyb0188d42007-07-15 00:01:25 -0700234 excess = (struct atm_flow_data *)
Patrick McHardy1587bac2008-01-23 20:35:03 -0800235 atm_tc_get(sch, nla_get_u32(tb[TCA_ATM_EXCESS]));
Patrick McHardyb0188d42007-07-15 00:01:25 -0700236 if (!excess)
237 return -ENOENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 }
Patrick McHardyf5e5cb72008-01-23 20:32:06 -0800239 pr_debug("atm_tc_change: type %d, payload %d, hdr_len %d\n",
Patrick McHardy1e904742008-01-22 22:11:17 -0800240 opt->nla_type, nla_len(opt), hdr_len);
Stephen Hemminger786a9032008-01-21 02:25:29 -0800241 sock = sockfd_lookup(fd, &error);
242 if (!sock)
Patrick McHardyb0188d42007-07-15 00:01:25 -0700243 return error; /* f_count++ */
Al Viro516e0cc2008-07-26 00:39:17 -0400244 pr_debug("atm_tc_change: f_count %ld\n", file_count(sock->file));
YOSHIFUJI Hideaki10297b92007-02-09 23:25:16 +0900245 if (sock->ops->family != PF_ATMSVC && sock->ops->family != PF_ATMPVC) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 error = -EPROTOTYPE;
YOSHIFUJI Hideaki10297b92007-02-09 23:25:16 +0900247 goto err_out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 }
249 /* @@@ should check if the socket is really operational or we'll crash
250 on vcc->send */
251 if (classid) {
252 if (TC_H_MAJ(classid ^ sch->handle)) {
Stephen Hemminger786a9032008-01-21 02:25:29 -0800253 pr_debug("atm_tc_change: classid mismatch\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 error = -EINVAL;
255 goto err_out;
256 }
Patrick McHardyb0188d42007-07-15 00:01:25 -0700257 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 int i;
259 unsigned long cl;
260
261 for (i = 1; i < 0x8000; i++) {
Patrick McHardyb0188d42007-07-15 00:01:25 -0700262 classid = TC_H_MAKE(sch->handle, 0x8000 | i);
Stephen Hemminger786a9032008-01-21 02:25:29 -0800263 cl = atm_tc_get(sch, classid);
264 if (!cl)
Patrick McHardyb0188d42007-07-15 00:01:25 -0700265 break;
266 atm_tc_put(sch, cl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 }
268 }
Stephen Hemminger786a9032008-01-21 02:25:29 -0800269 pr_debug("atm_tc_change: new id %x\n", classid);
vignesh babu782f7952007-07-16 18:30:36 -0700270 flow = kzalloc(sizeof(struct atm_flow_data) + hdr_len, GFP_KERNEL);
Stephen Hemminger786a9032008-01-21 02:25:29 -0800271 pr_debug("atm_tc_change: flow %p\n", flow);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 if (!flow) {
273 error = -ENOBUFS;
274 goto err_out;
275 }
John Fastabend25d8c0d2014-09-12 20:05:27 -0700276 RCU_INIT_POINTER(flow->filter_list, NULL);
Changli Gao3511c912010-10-16 13:04:08 +0000277 flow->q = qdisc_create_dflt(sch->dev_queue, &pfifo_qdisc_ops, classid);
Stephen Hemminger786a9032008-01-21 02:25:29 -0800278 if (!flow->q)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 flow->q = &noop_qdisc;
Stephen Hemminger786a9032008-01-21 02:25:29 -0800280 pr_debug("atm_tc_change: qdisc %p\n", flow->q);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281 flow->sock = sock;
Patrick McHardyb0188d42007-07-15 00:01:25 -0700282 flow->vcc = ATM_SD(sock); /* speedup */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283 flow->vcc->user_back = flow;
Stephen Hemminger786a9032008-01-21 02:25:29 -0800284 pr_debug("atm_tc_change: vcc %p\n", flow->vcc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 flow->old_pop = flow->vcc->pop;
286 flow->parent = p;
287 flow->vcc->pop = sch_atm_pop;
288 flow->classid = classid;
289 flow->ref = 1;
290 flow->excess = excess;
David S. Miller6accec72010-07-18 19:52:55 -0700291 list_add(&flow->list, &p->link.list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 flow->hdr_len = hdr_len;
293 if (hdr)
Patrick McHardyb0188d42007-07-15 00:01:25 -0700294 memcpy(flow->hdr, hdr, hdr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 else
Patrick McHardyb0188d42007-07-15 00:01:25 -0700296 memcpy(flow->hdr, llc_oui_ip, sizeof(llc_oui_ip));
297 *arg = (unsigned long)flow;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298 return 0;
299err_out:
Patrick McHardyb0188d42007-07-15 00:01:25 -0700300 if (excess)
301 atm_tc_put(sch, (unsigned long)excess);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302 sockfd_put(sock);
303 return error;
304}
305
Patrick McHardyb0188d42007-07-15 00:01:25 -0700306static int atm_tc_delete(struct Qdisc *sch, unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800308 struct atm_qdisc_data *p = qdisc_priv(sch);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700309 struct atm_flow_data *flow = (struct atm_flow_data *)arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310
Stephen Hemminger786a9032008-01-21 02:25:29 -0800311 pr_debug("atm_tc_delete(sch %p,[qdisc %p],flow %p)\n", sch, p, flow);
David S. Miller6accec72010-07-18 19:52:55 -0700312 if (list_empty(&flow->list))
Patrick McHardyb0188d42007-07-15 00:01:25 -0700313 return -EINVAL;
John Fastabend25d8c0d2014-09-12 20:05:27 -0700314 if (rcu_access_pointer(flow->filter_list) || flow == &p->link)
Patrick McHardyb0188d42007-07-15 00:01:25 -0700315 return -EBUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316 /*
317 * Reference count must be 2: one for "keepalive" (set at class
318 * creation), and one for the reference held when calling delete.
319 */
320 if (flow->ref < 2) {
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000321 pr_err("atm_tc_delete: flow->ref == %d\n", flow->ref);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 return -EINVAL;
323 }
Patrick McHardyb0188d42007-07-15 00:01:25 -0700324 if (flow->ref > 2)
325 return -EBUSY; /* catch references via excess, etc. */
326 atm_tc_put(sch, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 return 0;
328}
329
Patrick McHardyb0188d42007-07-15 00:01:25 -0700330static void atm_tc_walk(struct Qdisc *sch, struct qdisc_walker *walker)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800332 struct atm_qdisc_data *p = qdisc_priv(sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333 struct atm_flow_data *flow;
334
Stephen Hemminger786a9032008-01-21 02:25:29 -0800335 pr_debug("atm_tc_walk(sch %p,[qdisc %p],walker %p)\n", sch, p, walker);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700336 if (walker->stop)
337 return;
David S. Miller6accec72010-07-18 19:52:55 -0700338 list_for_each_entry(flow, &p->flows, list) {
339 if (walker->count >= walker->skip &&
340 walker->fn(sch, (unsigned long)flow, walker) < 0) {
341 walker->stop = 1;
342 break;
343 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 walker->count++;
345 }
346}
347
John Fastabend25d8c0d2014-09-12 20:05:27 -0700348static struct tcf_proto __rcu **atm_tc_find_tcf(struct Qdisc *sch,
349 unsigned long cl)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800351 struct atm_qdisc_data *p = qdisc_priv(sch);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700352 struct atm_flow_data *flow = (struct atm_flow_data *)cl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353
Stephen Hemminger786a9032008-01-21 02:25:29 -0800354 pr_debug("atm_tc_find_tcf(sch %p,[qdisc %p],flow %p)\n", sch, p, flow);
YOSHIFUJI Hideaki10297b92007-02-09 23:25:16 +0900355 return flow ? &flow->filter_list : &p->link.filter_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356}
357
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358/* --------------------------- Qdisc operations ---------------------------- */
359
Eric Dumazet520ac302016-06-21 23:16:49 -0700360static int atm_tc_enqueue(struct sk_buff *skb, struct Qdisc *sch,
361 struct sk_buff **to_free)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800363 struct atm_qdisc_data *p = qdisc_priv(sch);
David S. Miller6accec72010-07-18 19:52:55 -0700364 struct atm_flow_data *flow;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 struct tcf_result res;
366 int result;
Florian Westphal99860202016-06-11 12:46:04 +0200367 int ret = NET_XMIT_SUCCESS | __NET_XMIT_BYPASS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368
Stephen Hemminger786a9032008-01-21 02:25:29 -0800369 pr_debug("atm_tc_enqueue(skb %p,sch %p,[qdisc %p])\n", skb, sch, p);
WANG Cong95df1b12016-06-13 10:47:43 -0700370 result = TC_ACT_OK; /* be nice to gcc */
David S. Miller6accec72010-07-18 19:52:55 -0700371 flow = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372 if (TC_H_MAJ(skb->priority) != sch->handle ||
David S. Miller6accec72010-07-18 19:52:55 -0700373 !(flow = (struct atm_flow_data *)atm_tc_get(sch, skb->priority))) {
John Fastabend25d8c0d2014-09-12 20:05:27 -0700374 struct tcf_proto *fl;
375
David S. Miller6accec72010-07-18 19:52:55 -0700376 list_for_each_entry(flow, &p->flows, list) {
John Fastabend25d8c0d2014-09-12 20:05:27 -0700377 fl = rcu_dereference_bh(flow->filter_list);
378 if (fl) {
Daniel Borkmann3b3ae882015-08-26 23:00:06 +0200379 result = tc_classify(skb, fl, &res, true);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700380 if (result < 0)
381 continue;
382 flow = (struct atm_flow_data *)res.class;
383 if (!flow)
384 flow = lookup_flow(sch, res.classid);
David S. Miller6accec72010-07-18 19:52:55 -0700385 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 }
David S. Miller6accec72010-07-18 19:52:55 -0700387 }
388 flow = NULL;
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000389done:
390 ;
David S. Miller6accec72010-07-18 19:52:55 -0700391 }
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000392 if (!flow) {
Patrick McHardyb0188d42007-07-15 00:01:25 -0700393 flow = &p->link;
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000394 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 if (flow->vcc)
396 ATM_SKB(skb)->atm_options = flow->vcc->atm_options;
Patrick McHardyb0188d42007-07-15 00:01:25 -0700397 /*@@@ looks good ... but it's not supposed to work :-) */
Patrick McHardy92100802007-07-15 00:01:49 -0700398#ifdef CONFIG_NET_CLS_ACT
399 switch (result) {
400 case TC_ACT_QUEUED:
401 case TC_ACT_STOLEN:
Eric Dumazet520ac302016-06-21 23:16:49 -0700402 __qdisc_drop(skb, to_free);
Jarek Poplawski378a2f02008-08-04 22:31:03 -0700403 return NET_XMIT_SUCCESS | __NET_XMIT_STOLEN;
Patrick McHardy92100802007-07-15 00:01:49 -0700404 case TC_ACT_SHOT:
Eric Dumazet520ac302016-06-21 23:16:49 -0700405 __qdisc_drop(skb, to_free);
Patrick McHardy92100802007-07-15 00:01:49 -0700406 goto drop;
WANG Cong95df1b12016-06-13 10:47:43 -0700407 case TC_ACT_RECLASSIFY:
Patrick McHardy73ca4912007-07-15 00:02:31 -0700408 if (flow->excess)
409 flow = flow->excess;
410 else
411 ATM_SKB(skb)->atm_options |= ATM_ATMOPT_CLP;
412 break;
Patrick McHardy92100802007-07-15 00:01:49 -0700413 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414#endif
415 }
Patrick McHardyc3bc7cf2007-07-15 00:03:05 -0700416
Eric Dumazet520ac302016-06-21 23:16:49 -0700417 ret = qdisc_enqueue(skb, flow->q, to_free);
Ben Greear9871e502010-08-10 01:45:40 -0700418 if (ret != NET_XMIT_SUCCESS) {
Patrick McHardy92100802007-07-15 00:01:49 -0700419drop: __maybe_unused
Jarek Poplawski378a2f02008-08-04 22:31:03 -0700420 if (net_xmit_drop_count(ret)) {
John Fastabend25331d62014-09-28 11:53:29 -0700421 qdisc_qstats_drop(sch);
Jarek Poplawski378a2f02008-08-04 22:31:03 -0700422 if (flow)
423 flow->qstats.drops++;
424 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 return ret;
426 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 /*
428 * Okay, this may seem weird. We pretend we've dropped the packet if
429 * it goes via ATM. The reason for this is that the outer qdisc
430 * expects to be able to q->dequeue the packet later on if we return
431 * success at this place. Also, sch->q.qdisc needs to reflect whether
432 * there is a packet egligible for dequeuing or not. Note that the
433 * statistics of the outer qdisc are necessarily wrong because of all
434 * this. There's currently no correct solution for this.
435 */
436 if (flow == &p->link) {
437 sch->q.qlen++;
Ben Greear9871e502010-08-10 01:45:40 -0700438 return NET_XMIT_SUCCESS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439 }
440 tasklet_schedule(&p->task);
Jarek Poplawskic27f3392008-08-04 22:39:11 -0700441 return NET_XMIT_SUCCESS | __NET_XMIT_BYPASS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442}
443
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444/*
445 * Dequeue packets and send them over ATM. Note that we quite deliberately
446 * avoid checking net_device's flow control here, simply because sch_atm
447 * uses its own channels, which have nothing to do with any CLIP/LANE/or
448 * non-ATM interfaces.
449 */
450
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451static void sch_atm_dequeue(unsigned long data)
452{
Patrick McHardyb0188d42007-07-15 00:01:25 -0700453 struct Qdisc *sch = (struct Qdisc *)data;
Stephen Hemminger786a9032008-01-21 02:25:29 -0800454 struct atm_qdisc_data *p = qdisc_priv(sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 struct atm_flow_data *flow;
456 struct sk_buff *skb;
457
Stephen Hemminger786a9032008-01-21 02:25:29 -0800458 pr_debug("sch_atm_dequeue(sch %p,[qdisc %p])\n", sch, p);
David S. Miller6accec72010-07-18 19:52:55 -0700459 list_for_each_entry(flow, &p->flows, list) {
460 if (flow == &p->link)
461 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 /*
463 * If traffic is properly shaped, this won't generate nasty
464 * little bursts. Otherwise, it may ... (but that's okay)
465 */
Jarek Poplawski03c05f02008-10-31 00:46:19 -0700466 while ((skb = flow->q->ops->peek(flow->q))) {
467 if (!atm_may_send(flow->vcc, skb->truesize))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 break;
Jarek Poplawski03c05f02008-10-31 00:46:19 -0700469
Jarek Poplawski77be1552008-10-31 00:47:01 -0700470 skb = qdisc_dequeue_peeked(flow->q);
Jarek Poplawski03c05f02008-10-31 00:46:19 -0700471 if (unlikely(!skb))
472 break;
473
Eric Dumazet2dd875f2012-05-10 05:36:34 +0000474 qdisc_bstats_update(sch, skb);
475 bstats_update(&flow->bstats, skb);
Stephen Hemminger786a9032008-01-21 02:25:29 -0800476 pr_debug("atm_tc_dequeue: sending on class %p\n", flow);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477 /* remove any LL header somebody else has attached */
Arnaldo Carvalho de Meloeddc9ec2007-04-20 22:47:35 -0700478 skb_pull(skb, skb_network_offset(skb));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479 if (skb_headroom(skb) < flow->hdr_len) {
480 struct sk_buff *new;
481
Patrick McHardyb0188d42007-07-15 00:01:25 -0700482 new = skb_realloc_headroom(skb, flow->hdr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 dev_kfree_skb(skb);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700484 if (!new)
485 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486 skb = new;
487 }
Stephen Hemminger786a9032008-01-21 02:25:29 -0800488 pr_debug("sch_atm_dequeue: ip %p, data %p\n",
Arnaldo Carvalho de Meloeddc9ec2007-04-20 22:47:35 -0700489 skb_network_header(skb), skb->data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490 ATM_SKB(skb)->vcc = flow->vcc;
Patrick McHardyb0188d42007-07-15 00:01:25 -0700491 memcpy(skb_push(skb, flow->hdr_len), flow->hdr,
492 flow->hdr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 atomic_add(skb->truesize,
494 &sk_atm(flow->vcc)->sk_wmem_alloc);
495 /* atm.atm_options are already set by atm_tc_enqueue */
Patrick McHardyb0188d42007-07-15 00:01:25 -0700496 flow->vcc->send(flow->vcc, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497 }
David S. Miller6accec72010-07-18 19:52:55 -0700498 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499}
500
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501static struct sk_buff *atm_tc_dequeue(struct Qdisc *sch)
502{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800503 struct atm_qdisc_data *p = qdisc_priv(sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504 struct sk_buff *skb;
505
Stephen Hemminger786a9032008-01-21 02:25:29 -0800506 pr_debug("atm_tc_dequeue(sch %p,[qdisc %p])\n", sch, p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507 tasklet_schedule(&p->task);
Jarek Poplawski77be1552008-10-31 00:47:01 -0700508 skb = qdisc_dequeue_peeked(p->link.q);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700509 if (skb)
510 sch->q.qlen--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511 return skb;
512}
513
Jarek Poplawski8e3af972008-10-31 00:45:55 -0700514static struct sk_buff *atm_tc_peek(struct Qdisc *sch)
515{
516 struct atm_qdisc_data *p = qdisc_priv(sch);
517
518 pr_debug("atm_tc_peek(sch %p,[qdisc %p])\n", sch, p);
519
520 return p->link.q->ops->peek(p->link.q);
521}
522
Patrick McHardy1e904742008-01-22 22:11:17 -0800523static int atm_tc_init(struct Qdisc *sch, struct nlattr *opt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800525 struct atm_qdisc_data *p = qdisc_priv(sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526
Stephen Hemminger786a9032008-01-21 02:25:29 -0800527 pr_debug("atm_tc_init(sch %p,[qdisc %p],opt %p)\n", sch, p, opt);
David S. Miller6accec72010-07-18 19:52:55 -0700528 INIT_LIST_HEAD(&p->flows);
529 INIT_LIST_HEAD(&p->link.list);
530 list_add(&p->link.list, &p->flows);
Changli Gao3511c912010-10-16 13:04:08 +0000531 p->link.q = qdisc_create_dflt(sch->dev_queue,
David S. Millerbb949fb2008-07-08 16:55:56 -0700532 &pfifo_qdisc_ops, sch->handle);
Stephen Hemminger786a9032008-01-21 02:25:29 -0800533 if (!p->link.q)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534 p->link.q = &noop_qdisc;
Stephen Hemminger786a9032008-01-21 02:25:29 -0800535 pr_debug("atm_tc_init: link (%p) qdisc %p\n", &p->link, p->link.q);
John Fastabend25d8c0d2014-09-12 20:05:27 -0700536 RCU_INIT_POINTER(p->link.filter_list, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537 p->link.vcc = NULL;
538 p->link.sock = NULL;
539 p->link.classid = sch->handle;
540 p->link.ref = 1;
Patrick McHardyb0188d42007-07-15 00:01:25 -0700541 tasklet_init(&p->task, sch_atm_dequeue, (unsigned long)sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542 return 0;
543}
544
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545static void atm_tc_reset(struct Qdisc *sch)
546{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800547 struct atm_qdisc_data *p = qdisc_priv(sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548 struct atm_flow_data *flow;
549
Stephen Hemminger786a9032008-01-21 02:25:29 -0800550 pr_debug("atm_tc_reset(sch %p,[qdisc %p])\n", sch, p);
David S. Miller6accec72010-07-18 19:52:55 -0700551 list_for_each_entry(flow, &p->flows, list)
Patrick McHardyb0188d42007-07-15 00:01:25 -0700552 qdisc_reset(flow->q);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553 sch->q.qlen = 0;
554}
555
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556static void atm_tc_destroy(struct Qdisc *sch)
557{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800558 struct atm_qdisc_data *p = qdisc_priv(sch);
David S. Miller6accec72010-07-18 19:52:55 -0700559 struct atm_flow_data *flow, *tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560
Stephen Hemminger786a9032008-01-21 02:25:29 -0800561 pr_debug("atm_tc_destroy(sch %p,[qdisc %p])\n", sch, p);
David S. Miller6accec72010-07-18 19:52:55 -0700562 list_for_each_entry(flow, &p->flows, list)
Patrick McHardya4aebb82008-07-01 19:53:09 -0700563 tcf_destroy_chain(&flow->filter_list);
564
David S. Miller6accec72010-07-18 19:52:55 -0700565 list_for_each_entry_safe(flow, tmp, &p->flows, list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566 if (flow->ref > 1)
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000567 pr_err("atm_destroy: %p->ref = %d\n", flow, flow->ref);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700568 atm_tc_put(sch, (unsigned long)flow);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 }
570 tasklet_kill(&p->task);
571}
572
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573static int atm_tc_dump_class(struct Qdisc *sch, unsigned long cl,
Patrick McHardyb0188d42007-07-15 00:01:25 -0700574 struct sk_buff *skb, struct tcmsg *tcm)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800576 struct atm_qdisc_data *p = qdisc_priv(sch);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700577 struct atm_flow_data *flow = (struct atm_flow_data *)cl;
Patrick McHardy4b3550ef2008-01-23 20:34:11 -0800578 struct nlattr *nest;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579
Stephen Hemminger786a9032008-01-21 02:25:29 -0800580 pr_debug("atm_tc_dump_class(sch %p,[qdisc %p],flow %p,skb %p,tcm %p)\n",
Patrick McHardyb0188d42007-07-15 00:01:25 -0700581 sch, p, flow, skb, tcm);
David S. Miller6accec72010-07-18 19:52:55 -0700582 if (list_empty(&flow->list))
Patrick McHardyb0188d42007-07-15 00:01:25 -0700583 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 tcm->tcm_handle = flow->classid;
Patrick McHardycdc7f8e2006-03-20 19:01:06 -0800585 tcm->tcm_info = flow->q->handle;
Patrick McHardy4b3550ef2008-01-23 20:34:11 -0800586
587 nest = nla_nest_start(skb, TCA_OPTIONS);
588 if (nest == NULL)
589 goto nla_put_failure;
590
David S. Miller1b34ec42012-03-29 05:11:39 -0400591 if (nla_put(skb, TCA_ATM_HDR, flow->hdr_len, flow->hdr))
592 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 if (flow->vcc) {
594 struct sockaddr_atmpvc pvc;
595 int state;
596
Dan Carpenter8cb3b9c2013-07-30 13:23:39 +0300597 memset(&pvc, 0, sizeof(pvc));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 pvc.sap_family = AF_ATMPVC;
599 pvc.sap_addr.itf = flow->vcc->dev ? flow->vcc->dev->number : -1;
600 pvc.sap_addr.vpi = flow->vcc->vpi;
601 pvc.sap_addr.vci = flow->vcc->vci;
David S. Miller1b34ec42012-03-29 05:11:39 -0400602 if (nla_put(skb, TCA_ATM_ADDR, sizeof(pvc), &pvc))
603 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604 state = ATM_VF2VS(flow->vcc->flags);
David S. Miller1b34ec42012-03-29 05:11:39 -0400605 if (nla_put_u32(skb, TCA_ATM_STATE, state))
606 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607 }
David S. Miller1b34ec42012-03-29 05:11:39 -0400608 if (flow->excess) {
609 if (nla_put_u32(skb, TCA_ATM_EXCESS, flow->classid))
610 goto nla_put_failure;
611 } else {
612 if (nla_put_u32(skb, TCA_ATM_EXCESS, 0))
613 goto nla_put_failure;
614 }
Yang Yingliangd59b7d82014-03-12 10:20:32 +0800615 return nla_nest_end(skb, nest);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616
Patrick McHardy1e904742008-01-22 22:11:17 -0800617nla_put_failure:
Patrick McHardy4b3550ef2008-01-23 20:34:11 -0800618 nla_nest_cancel(skb, nest);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619 return -1;
620}
621static int
622atm_tc_dump_class_stats(struct Qdisc *sch, unsigned long arg,
Patrick McHardyb0188d42007-07-15 00:01:25 -0700623 struct gnet_dump *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624{
Patrick McHardyb0188d42007-07-15 00:01:25 -0700625 struct atm_flow_data *flow = (struct atm_flow_data *)arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626
Eric Dumazetedb09eb2016-06-06 09:37:16 -0700627 if (gnet_stats_copy_basic(qdisc_root_sleeping_running(sch),
628 d, NULL, &flow->bstats) < 0 ||
John Fastabendb0ab6f92014-09-28 11:54:24 -0700629 gnet_stats_copy_queue(d, NULL, &flow->qstats, flow->q->q.qlen) < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630 return -1;
631
632 return 0;
633}
634
635static int atm_tc_dump(struct Qdisc *sch, struct sk_buff *skb)
636{
637 return 0;
638}
639
Eric Dumazet20fea082007-11-14 01:44:41 -0800640static const struct Qdisc_class_ops atm_class_ops = {
Patrick McHardyb0188d42007-07-15 00:01:25 -0700641 .graft = atm_tc_graft,
642 .leaf = atm_tc_leaf,
643 .get = atm_tc_get,
644 .put = atm_tc_put,
645 .change = atm_tc_change,
646 .delete = atm_tc_delete,
647 .walk = atm_tc_walk,
648 .tcf_chain = atm_tc_find_tcf,
649 .bind_tcf = atm_tc_bind_filter,
650 .unbind_tcf = atm_tc_put,
651 .dump = atm_tc_dump_class,
652 .dump_stats = atm_tc_dump_class_stats,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653};
654
Eric Dumazet20fea082007-11-14 01:44:41 -0800655static struct Qdisc_ops atm_qdisc_ops __read_mostly = {
Patrick McHardyb0188d42007-07-15 00:01:25 -0700656 .cl_ops = &atm_class_ops,
657 .id = "atm",
658 .priv_size = sizeof(struct atm_qdisc_data),
659 .enqueue = atm_tc_enqueue,
660 .dequeue = atm_tc_dequeue,
Jarek Poplawski8e3af972008-10-31 00:45:55 -0700661 .peek = atm_tc_peek,
Patrick McHardyb0188d42007-07-15 00:01:25 -0700662 .init = atm_tc_init,
663 .reset = atm_tc_reset,
664 .destroy = atm_tc_destroy,
665 .dump = atm_tc_dump,
666 .owner = THIS_MODULE,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667};
668
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669static int __init atm_init(void)
670{
671 return register_qdisc(&atm_qdisc_ops);
672}
673
YOSHIFUJI Hideaki10297b92007-02-09 23:25:16 +0900674static void __exit atm_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675{
676 unregister_qdisc(&atm_qdisc_ops);
677}
678
679module_init(atm_init)
680module_exit(atm_exit)
681MODULE_LICENSE("GPL");