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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>
8#include <linux/string.h>
9#include <linux/errno.h>
10#include <linux/skbuff.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070011#include <linux/atmdev.h>
12#include <linux/atmclip.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070013#include <linux/rtnetlink.h>
Patrick McHardyb0188d42007-07-15 00:01:25 -070014#include <linux/file.h> /* for fput */
Arnaldo Carvalho de Melodc5fc572007-03-25 23:06:12 -070015#include <net/netlink.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#include <net/pkt_sched.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017
Patrick McHardyb0188d42007-07-15 00:01:25 -070018extern struct socket *sockfd_lookup(int fd, int *err); /* @@@ fix this */
Linus Torvalds1da177e2005-04-16 15:20:36 -070019
Linus Torvalds1da177e2005-04-16 15:20:36 -070020/*
21 * The ATM queuing discipline provides a framework for invoking classifiers
22 * (aka "filters"), which in turn select classes of this queuing discipline.
23 * Each class maps the flow(s) it is handling to a given VC. Multiple classes
24 * may share the same VC.
25 *
26 * When creating a class, VCs are specified by passing the number of the open
27 * socket descriptor by which the calling process references the VC. The kernel
28 * keeps the VC open at least until all classes using it are removed.
29 *
30 * In this file, most functions are named atm_tc_* to avoid confusion with all
31 * the atm_* in net/atm. This naming convention differs from what's used in the
32 * rest of net/sched.
33 *
34 * Known bugs:
35 * - sometimes messes up the IP stack
36 * - any manipulations besides the few operations described in the README, are
37 * untested and likely to crash the system
38 * - should lock the flow while there is data in the queue (?)
39 */
40
Linus Torvalds1da177e2005-04-16 15:20:36 -070041#define VCC2FLOW(vcc) ((struct atm_flow_data *) ((vcc)->user_back))
42
Linus Torvalds1da177e2005-04-16 15:20:36 -070043struct atm_flow_data {
Patrick McHardyb0188d42007-07-15 00:01:25 -070044 struct Qdisc *q; /* FIFO, TBF, etc. */
Linus Torvalds1da177e2005-04-16 15:20:36 -070045 struct tcf_proto *filter_list;
Patrick McHardyb0188d42007-07-15 00:01:25 -070046 struct atm_vcc *vcc; /* VCC; NULL if VCC is closed */
47 void (*old_pop)(struct atm_vcc *vcc,
Stephen Hemminger786a9032008-01-21 02:25:29 -080048 struct sk_buff *skb); /* chaining */
Linus Torvalds1da177e2005-04-16 15:20:36 -070049 struct atm_qdisc_data *parent; /* parent qdisc */
50 struct socket *sock; /* for closing */
51 u32 classid; /* x:y type ID */
52 int ref; /* reference count */
Eric Dumazetc1a8f1f2009-08-16 09:36:49 +000053 struct gnet_stats_basic_packed bstats;
Linus Torvalds1da177e2005-04-16 15:20:36 -070054 struct gnet_stats_queue qstats;
David S. Miller6accec72010-07-18 19:52:55 -070055 struct list_head list;
Linus Torvalds1da177e2005-04-16 15:20:36 -070056 struct atm_flow_data *excess; /* flow for excess traffic;
57 NULL to set CLP instead */
58 int hdr_len;
59 unsigned char hdr[0]; /* header data; MUST BE LAST */
60};
61
62struct atm_qdisc_data {
63 struct atm_flow_data link; /* unclassified skbs go here */
David S. Miller6accec72010-07-18 19:52:55 -070064 struct list_head flows; /* NB: "link" is also on this
Linus Torvalds1da177e2005-04-16 15:20:36 -070065 list */
Jarek Poplawskif30ab412008-11-13 22:56:30 -080066 struct tasklet_struct task; /* dequeue tasklet */
Linus Torvalds1da177e2005-04-16 15:20:36 -070067};
68
Linus Torvalds1da177e2005-04-16 15:20:36 -070069/* ------------------------- Class/flow operations ------------------------- */
70
Patrick McHardyb0188d42007-07-15 00:01:25 -070071static inline struct atm_flow_data *lookup_flow(struct Qdisc *sch, u32 classid)
Linus Torvalds1da177e2005-04-16 15:20:36 -070072{
Stephen Hemminger786a9032008-01-21 02:25:29 -080073 struct atm_qdisc_data *p = qdisc_priv(sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -070074 struct atm_flow_data *flow;
75
David S. Miller6accec72010-07-18 19:52:55 -070076 list_for_each_entry(flow, &p->flows, list) {
Patrick McHardyb0188d42007-07-15 00:01:25 -070077 if (flow->classid == classid)
David S. Miller6accec72010-07-18 19:52:55 -070078 return flow;
79 }
80 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070081}
82
Patrick McHardyb0188d42007-07-15 00:01:25 -070083static int atm_tc_graft(struct Qdisc *sch, unsigned long arg,
84 struct Qdisc *new, struct Qdisc **old)
Linus Torvalds1da177e2005-04-16 15:20:36 -070085{
Stephen Hemminger786a9032008-01-21 02:25:29 -080086 struct atm_qdisc_data *p = qdisc_priv(sch);
Patrick McHardyb0188d42007-07-15 00:01:25 -070087 struct atm_flow_data *flow = (struct atm_flow_data *)arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -070088
Stephen Hemminger786a9032008-01-21 02:25:29 -080089 pr_debug("atm_tc_graft(sch %p,[qdisc %p],flow %p,new %p,old %p)\n",
Patrick McHardyb0188d42007-07-15 00:01:25 -070090 sch, p, flow, new, old);
David S. Miller6accec72010-07-18 19:52:55 -070091 if (list_empty(&flow->list))
Patrick McHardyb0188d42007-07-15 00:01:25 -070092 return -EINVAL;
93 if (!new)
94 new = &noop_qdisc;
Patrick McHardyb94c8af2008-11-20 04:11:36 -080095 *old = flow->q;
96 flow->q = new;
Patrick McHardyb0188d42007-07-15 00:01:25 -070097 if (*old)
98 qdisc_reset(*old);
YOSHIFUJI Hideaki10297b92007-02-09 23:25:16 +090099 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100}
101
Patrick McHardyb0188d42007-07-15 00:01:25 -0700102static struct Qdisc *atm_tc_leaf(struct Qdisc *sch, unsigned long cl)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103{
Patrick McHardyb0188d42007-07-15 00:01:25 -0700104 struct atm_flow_data *flow = (struct atm_flow_data *)cl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105
Stephen Hemminger786a9032008-01-21 02:25:29 -0800106 pr_debug("atm_tc_leaf(sch %p,flow %p)\n", sch, flow);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 return flow ? flow->q : NULL;
108}
109
Patrick McHardyb0188d42007-07-15 00:01:25 -0700110static unsigned long atm_tc_get(struct Qdisc *sch, u32 classid)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800112 struct atm_qdisc_data *p __maybe_unused = qdisc_priv(sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113 struct atm_flow_data *flow;
114
Stephen Hemminger786a9032008-01-21 02:25:29 -0800115 pr_debug("atm_tc_get(sch %p,[qdisc %p],classid %x)\n", sch, p, classid);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700116 flow = lookup_flow(sch, classid);
117 if (flow)
118 flow->ref++;
Stephen Hemminger786a9032008-01-21 02:25:29 -0800119 pr_debug("atm_tc_get: flow %p\n", flow);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700120 return (unsigned long)flow;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121}
122
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123static unsigned long atm_tc_bind_filter(struct Qdisc *sch,
Patrick McHardyb0188d42007-07-15 00:01:25 -0700124 unsigned long parent, u32 classid)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125{
Patrick McHardyb0188d42007-07-15 00:01:25 -0700126 return atm_tc_get(sch, classid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127}
128
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129/*
130 * atm_tc_put handles all destructions, including the ones that are explicitly
131 * requested (atm_tc_destroy, etc.). The assumption here is that we never drop
132 * anything that still seems to be in use.
133 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134static void atm_tc_put(struct Qdisc *sch, unsigned long cl)
135{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800136 struct atm_qdisc_data *p = qdisc_priv(sch);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700137 struct atm_flow_data *flow = (struct atm_flow_data *)cl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138
Stephen Hemminger786a9032008-01-21 02:25:29 -0800139 pr_debug("atm_tc_put(sch %p,[qdisc %p],flow %p)\n", sch, p, flow);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700140 if (--flow->ref)
141 return;
Stephen Hemminger786a9032008-01-21 02:25:29 -0800142 pr_debug("atm_tc_put: destroying\n");
David S. Miller6accec72010-07-18 19:52:55 -0700143 list_del_init(&flow->list);
Stephen Hemminger786a9032008-01-21 02:25:29 -0800144 pr_debug("atm_tc_put: qdisc %p\n", flow->q);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 qdisc_destroy(flow->q);
Patrick McHardyff31ab52008-07-01 19:52:38 -0700146 tcf_destroy_chain(&flow->filter_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147 if (flow->sock) {
Al Viro516e0cc2008-07-26 00:39:17 -0400148 pr_debug("atm_tc_put: f_count %ld\n",
Patrick McHardyb0188d42007-07-15 00:01:25 -0700149 file_count(flow->sock->file));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 flow->vcc->pop = flow->old_pop;
151 sockfd_put(flow->sock);
152 }
Patrick McHardyb0188d42007-07-15 00:01:25 -0700153 if (flow->excess)
154 atm_tc_put(sch, (unsigned long)flow->excess);
155 if (flow != &p->link)
156 kfree(flow);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157 /*
158 * If flow == &p->link, the qdisc no longer works at this point and
159 * needs to be removed. (By the caller of atm_tc_put.)
160 */
161}
162
Patrick McHardyb0188d42007-07-15 00:01:25 -0700163static void sch_atm_pop(struct atm_vcc *vcc, struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164{
165 struct atm_qdisc_data *p = VCC2FLOW(vcc)->parent;
166
Stephen Hemminger786a9032008-01-21 02:25:29 -0800167 pr_debug("sch_atm_pop(vcc %p,skb %p,[qdisc %p])\n", vcc, skb, p);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700168 VCC2FLOW(vcc)->old_pop(vcc, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 tasklet_schedule(&p->task);
170}
171
172static const u8 llc_oui_ip[] = {
Patrick McHardyb0188d42007-07-15 00:01:25 -0700173 0xaa, /* DSAP: non-ISO */
174 0xaa, /* SSAP: non-ISO */
175 0x03, /* Ctrl: Unnumbered Information Command PDU */
176 0x00, /* OUI: EtherType */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 0x00, 0x00,
Patrick McHardyb0188d42007-07-15 00:01:25 -0700178 0x08, 0x00
179}; /* Ethertype IP (0800) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180
Patrick McHardy27a34212008-01-23 20:35:39 -0800181static const struct nla_policy atm_policy[TCA_ATM_MAX + 1] = {
182 [TCA_ATM_FD] = { .type = NLA_U32 },
183 [TCA_ATM_EXCESS] = { .type = NLA_U32 },
184};
185
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186static int atm_tc_change(struct Qdisc *sch, u32 classid, u32 parent,
Patrick McHardy1e904742008-01-22 22:11:17 -0800187 struct nlattr **tca, unsigned long *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800189 struct atm_qdisc_data *p = qdisc_priv(sch);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700190 struct atm_flow_data *flow = (struct atm_flow_data *)*arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 struct atm_flow_data *excess = NULL;
Patrick McHardy1e904742008-01-22 22:11:17 -0800192 struct nlattr *opt = tca[TCA_OPTIONS];
193 struct nlattr *tb[TCA_ATM_MAX + 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 struct socket *sock;
Patrick McHardyb0188d42007-07-15 00:01:25 -0700195 int fd, error, hdr_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196 void *hdr;
197
Stephen Hemminger786a9032008-01-21 02:25:29 -0800198 pr_debug("atm_tc_change(sch %p,[qdisc %p],classid %x,parent %x,"
Patrick McHardyb0188d42007-07-15 00:01:25 -0700199 "flow %p,opt %p)\n", sch, p, classid, parent, flow, opt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 /*
201 * The concept of parents doesn't apply for this qdisc.
202 */
203 if (parent && parent != TC_H_ROOT && parent != sch->handle)
204 return -EINVAL;
205 /*
206 * ATM classes cannot be changed. In order to change properties of the
207 * ATM connection, that socket needs to be modified directly (via the
208 * native ATM API. In order to send a flow to a different VC, the old
209 * class needs to be removed and a new one added. (This may be changed
210 * later.)
211 */
Patrick McHardyb0188d42007-07-15 00:01:25 -0700212 if (flow)
213 return -EBUSY;
Patrick McHardycee63722008-01-23 20:33:32 -0800214 if (opt == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 return -EINVAL;
Patrick McHardy27a34212008-01-23 20:35:39 -0800216
217 error = nla_parse_nested(tb, TCA_ATM_MAX, opt, atm_policy);
Patrick McHardycee63722008-01-23 20:33:32 -0800218 if (error < 0)
219 return error;
220
Patrick McHardy27a34212008-01-23 20:35:39 -0800221 if (!tb[TCA_ATM_FD])
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 return -EINVAL;
Patrick McHardy1587bac2008-01-23 20:35:03 -0800223 fd = nla_get_u32(tb[TCA_ATM_FD]);
Stephen Hemminger786a9032008-01-21 02:25:29 -0800224 pr_debug("atm_tc_change: fd %d\n", fd);
Patrick McHardy1e904742008-01-22 22:11:17 -0800225 if (tb[TCA_ATM_HDR]) {
226 hdr_len = nla_len(tb[TCA_ATM_HDR]);
227 hdr = nla_data(tb[TCA_ATM_HDR]);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700228 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 hdr_len = RFC1483LLC_LEN;
Patrick McHardyb0188d42007-07-15 00:01:25 -0700230 hdr = NULL; /* default LLC/SNAP for IP */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231 }
Patrick McHardy1e904742008-01-22 22:11:17 -0800232 if (!tb[TCA_ATM_EXCESS])
Patrick McHardyb0188d42007-07-15 00:01:25 -0700233 excess = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 else {
Patrick McHardyb0188d42007-07-15 00:01:25 -0700235 excess = (struct atm_flow_data *)
Patrick McHardy1587bac2008-01-23 20:35:03 -0800236 atm_tc_get(sch, nla_get_u32(tb[TCA_ATM_EXCESS]));
Patrick McHardyb0188d42007-07-15 00:01:25 -0700237 if (!excess)
238 return -ENOENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 }
Patrick McHardyf5e5cb72008-01-23 20:32:06 -0800240 pr_debug("atm_tc_change: type %d, payload %d, hdr_len %d\n",
Patrick McHardy1e904742008-01-22 22:11:17 -0800241 opt->nla_type, nla_len(opt), hdr_len);
Stephen Hemminger786a9032008-01-21 02:25:29 -0800242 sock = sockfd_lookup(fd, &error);
243 if (!sock)
Patrick McHardyb0188d42007-07-15 00:01:25 -0700244 return error; /* f_count++ */
Al Viro516e0cc2008-07-26 00:39:17 -0400245 pr_debug("atm_tc_change: f_count %ld\n", file_count(sock->file));
YOSHIFUJI Hideaki10297b92007-02-09 23:25:16 +0900246 if (sock->ops->family != PF_ATMSVC && sock->ops->family != PF_ATMPVC) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 error = -EPROTOTYPE;
YOSHIFUJI Hideaki10297b92007-02-09 23:25:16 +0900248 goto err_out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 }
250 /* @@@ should check if the socket is really operational or we'll crash
251 on vcc->send */
252 if (classid) {
253 if (TC_H_MAJ(classid ^ sch->handle)) {
Stephen Hemminger786a9032008-01-21 02:25:29 -0800254 pr_debug("atm_tc_change: classid mismatch\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 error = -EINVAL;
256 goto err_out;
257 }
Patrick McHardyb0188d42007-07-15 00:01:25 -0700258 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 int i;
260 unsigned long cl;
261
262 for (i = 1; i < 0x8000; i++) {
Patrick McHardyb0188d42007-07-15 00:01:25 -0700263 classid = TC_H_MAKE(sch->handle, 0x8000 | i);
Stephen Hemminger786a9032008-01-21 02:25:29 -0800264 cl = atm_tc_get(sch, classid);
265 if (!cl)
Patrick McHardyb0188d42007-07-15 00:01:25 -0700266 break;
267 atm_tc_put(sch, cl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 }
269 }
Stephen Hemminger786a9032008-01-21 02:25:29 -0800270 pr_debug("atm_tc_change: new id %x\n", classid);
vignesh babu782f7952007-07-16 18:30:36 -0700271 flow = kzalloc(sizeof(struct atm_flow_data) + hdr_len, GFP_KERNEL);
Stephen Hemminger786a9032008-01-21 02:25:29 -0800272 pr_debug("atm_tc_change: flow %p\n", flow);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 if (!flow) {
274 error = -ENOBUFS;
275 goto err_out;
276 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 flow->filter_list = NULL;
Changli Gao3511c912010-10-16 13:04:08 +0000278 flow->q = qdisc_create_dflt(sch->dev_queue, &pfifo_qdisc_ops, classid);
Stephen Hemminger786a9032008-01-21 02:25:29 -0800279 if (!flow->q)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 flow->q = &noop_qdisc;
Stephen Hemminger786a9032008-01-21 02:25:29 -0800281 pr_debug("atm_tc_change: qdisc %p\n", flow->q);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 flow->sock = sock;
Patrick McHardyb0188d42007-07-15 00:01:25 -0700283 flow->vcc = ATM_SD(sock); /* speedup */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284 flow->vcc->user_back = flow;
Stephen Hemminger786a9032008-01-21 02:25:29 -0800285 pr_debug("atm_tc_change: vcc %p\n", flow->vcc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 flow->old_pop = flow->vcc->pop;
287 flow->parent = p;
288 flow->vcc->pop = sch_atm_pop;
289 flow->classid = classid;
290 flow->ref = 1;
291 flow->excess = excess;
David S. Miller6accec72010-07-18 19:52:55 -0700292 list_add(&flow->list, &p->link.list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 flow->hdr_len = hdr_len;
294 if (hdr)
Patrick McHardyb0188d42007-07-15 00:01:25 -0700295 memcpy(flow->hdr, hdr, hdr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296 else
Patrick McHardyb0188d42007-07-15 00:01:25 -0700297 memcpy(flow->hdr, llc_oui_ip, sizeof(llc_oui_ip));
298 *arg = (unsigned long)flow;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 return 0;
300err_out:
Patrick McHardyb0188d42007-07-15 00:01:25 -0700301 if (excess)
302 atm_tc_put(sch, (unsigned long)excess);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 sockfd_put(sock);
304 return error;
305}
306
Patrick McHardyb0188d42007-07-15 00:01:25 -0700307static int atm_tc_delete(struct Qdisc *sch, unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800309 struct atm_qdisc_data *p = qdisc_priv(sch);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700310 struct atm_flow_data *flow = (struct atm_flow_data *)arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311
Stephen Hemminger786a9032008-01-21 02:25:29 -0800312 pr_debug("atm_tc_delete(sch %p,[qdisc %p],flow %p)\n", sch, p, flow);
David S. Miller6accec72010-07-18 19:52:55 -0700313 if (list_empty(&flow->list))
Patrick McHardyb0188d42007-07-15 00:01:25 -0700314 return -EINVAL;
315 if (flow->filter_list || flow == &p->link)
316 return -EBUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 /*
318 * Reference count must be 2: one for "keepalive" (set at class
319 * creation), and one for the reference held when calling delete.
320 */
321 if (flow->ref < 2) {
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000322 pr_err("atm_tc_delete: flow->ref == %d\n", flow->ref);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323 return -EINVAL;
324 }
Patrick McHardyb0188d42007-07-15 00:01:25 -0700325 if (flow->ref > 2)
326 return -EBUSY; /* catch references via excess, etc. */
327 atm_tc_put(sch, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 return 0;
329}
330
Patrick McHardyb0188d42007-07-15 00:01:25 -0700331static void atm_tc_walk(struct Qdisc *sch, struct qdisc_walker *walker)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800333 struct atm_qdisc_data *p = qdisc_priv(sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334 struct atm_flow_data *flow;
335
Stephen Hemminger786a9032008-01-21 02:25:29 -0800336 pr_debug("atm_tc_walk(sch %p,[qdisc %p],walker %p)\n", sch, p, walker);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700337 if (walker->stop)
338 return;
David S. Miller6accec72010-07-18 19:52:55 -0700339 list_for_each_entry(flow, &p->flows, list) {
340 if (walker->count >= walker->skip &&
341 walker->fn(sch, (unsigned long)flow, walker) < 0) {
342 walker->stop = 1;
343 break;
344 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345 walker->count++;
346 }
347}
348
Patrick McHardyb0188d42007-07-15 00:01:25 -0700349static struct tcf_proto **atm_tc_find_tcf(struct Qdisc *sch, 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
Patrick McHardyb0188d42007-07-15 00:01:25 -0700360static int atm_tc_enqueue(struct sk_buff *skb, struct Qdisc *sch)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800362 struct atm_qdisc_data *p = qdisc_priv(sch);
David S. Miller6accec72010-07-18 19:52:55 -0700363 struct atm_flow_data *flow;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364 struct tcf_result res;
365 int result;
366 int ret = NET_XMIT_POLICED;
367
Stephen Hemminger786a9032008-01-21 02:25:29 -0800368 pr_debug("atm_tc_enqueue(skb %p,sch %p,[qdisc %p])\n", skb, sch, p);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700369 result = TC_POLICE_OK; /* be nice to gcc */
David S. Miller6accec72010-07-18 19:52:55 -0700370 flow = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371 if (TC_H_MAJ(skb->priority) != sch->handle ||
David S. Miller6accec72010-07-18 19:52:55 -0700372 !(flow = (struct atm_flow_data *)atm_tc_get(sch, skb->priority))) {
373 list_for_each_entry(flow, &p->flows, list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 if (flow->filter_list) {
Patrick McHardy73ca4912007-07-15 00:02:31 -0700375 result = tc_classify_compat(skb,
376 flow->filter_list,
377 &res);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700378 if (result < 0)
379 continue;
380 flow = (struct atm_flow_data *)res.class;
381 if (!flow)
382 flow = lookup_flow(sch, res.classid);
David S. Miller6accec72010-07-18 19:52:55 -0700383 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384 }
David S. Miller6accec72010-07-18 19:52:55 -0700385 }
386 flow = NULL;
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000387done:
388 ;
David S. Miller6accec72010-07-18 19:52:55 -0700389 }
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000390 if (!flow) {
Patrick McHardyb0188d42007-07-15 00:01:25 -0700391 flow = &p->link;
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000392 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 if (flow->vcc)
394 ATM_SKB(skb)->atm_options = flow->vcc->atm_options;
Patrick McHardyb0188d42007-07-15 00:01:25 -0700395 /*@@@ looks good ... but it's not supposed to work :-) */
Patrick McHardy92100802007-07-15 00:01:49 -0700396#ifdef CONFIG_NET_CLS_ACT
397 switch (result) {
398 case TC_ACT_QUEUED:
399 case TC_ACT_STOLEN:
400 kfree_skb(skb);
Jarek Poplawski378a2f02008-08-04 22:31:03 -0700401 return NET_XMIT_SUCCESS | __NET_XMIT_STOLEN;
Patrick McHardy92100802007-07-15 00:01:49 -0700402 case TC_ACT_SHOT:
403 kfree_skb(skb);
404 goto drop;
Patrick McHardy73ca4912007-07-15 00:02:31 -0700405 case TC_POLICE_RECLASSIFY:
406 if (flow->excess)
407 flow = flow->excess;
408 else
409 ATM_SKB(skb)->atm_options |= ATM_ATMOPT_CLP;
410 break;
Patrick McHardy92100802007-07-15 00:01:49 -0700411 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412#endif
413 }
Patrick McHardyc3bc7cf2007-07-15 00:03:05 -0700414
Jussi Kivilinna5f861732008-07-20 00:08:04 -0700415 ret = qdisc_enqueue(skb, flow->q);
Ben Greear9871e502010-08-10 01:45:40 -0700416 if (ret != NET_XMIT_SUCCESS) {
Patrick McHardy92100802007-07-15 00:01:49 -0700417drop: __maybe_unused
Jarek Poplawski378a2f02008-08-04 22:31:03 -0700418 if (net_xmit_drop_count(ret)) {
419 sch->qstats.drops++;
420 if (flow)
421 flow->qstats.drops++;
422 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 return ret;
424 }
Eric Dumazetbfe0d022011-01-09 08:30:54 +0000425 qdisc_bstats_update(sch, skb);
426 bstats_update(&flow->bstats, skb);
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
Stephen Hemminger786a9032008-01-21 02:25:29 -0800474 pr_debug("atm_tc_dequeue: sending on class %p\n", flow);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475 /* remove any LL header somebody else has attached */
Arnaldo Carvalho de Meloeddc9ec2007-04-20 22:47:35 -0700476 skb_pull(skb, skb_network_offset(skb));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477 if (skb_headroom(skb) < flow->hdr_len) {
478 struct sk_buff *new;
479
Patrick McHardyb0188d42007-07-15 00:01:25 -0700480 new = skb_realloc_headroom(skb, flow->hdr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481 dev_kfree_skb(skb);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700482 if (!new)
483 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484 skb = new;
485 }
Stephen Hemminger786a9032008-01-21 02:25:29 -0800486 pr_debug("sch_atm_dequeue: ip %p, data %p\n",
Arnaldo Carvalho de Meloeddc9ec2007-04-20 22:47:35 -0700487 skb_network_header(skb), skb->data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 ATM_SKB(skb)->vcc = flow->vcc;
Patrick McHardyb0188d42007-07-15 00:01:25 -0700489 memcpy(skb_push(skb, flow->hdr_len), flow->hdr,
490 flow->hdr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 atomic_add(skb->truesize,
492 &sk_atm(flow->vcc)->sk_wmem_alloc);
493 /* atm.atm_options are already set by atm_tc_enqueue */
Patrick McHardyb0188d42007-07-15 00:01:25 -0700494 flow->vcc->send(flow->vcc, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 }
David S. Miller6accec72010-07-18 19:52:55 -0700496 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497}
498
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499static struct sk_buff *atm_tc_dequeue(struct Qdisc *sch)
500{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800501 struct atm_qdisc_data *p = qdisc_priv(sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502 struct sk_buff *skb;
503
Stephen Hemminger786a9032008-01-21 02:25:29 -0800504 pr_debug("atm_tc_dequeue(sch %p,[qdisc %p])\n", sch, p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505 tasklet_schedule(&p->task);
Jarek Poplawski77be1552008-10-31 00:47:01 -0700506 skb = qdisc_dequeue_peeked(p->link.q);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700507 if (skb)
508 sch->q.qlen--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 return skb;
510}
511
Jarek Poplawski8e3af972008-10-31 00:45:55 -0700512static struct sk_buff *atm_tc_peek(struct Qdisc *sch)
513{
514 struct atm_qdisc_data *p = qdisc_priv(sch);
515
516 pr_debug("atm_tc_peek(sch %p,[qdisc %p])\n", sch, p);
517
518 return p->link.q->ops->peek(p->link.q);
519}
520
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521static unsigned int atm_tc_drop(struct Qdisc *sch)
522{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800523 struct atm_qdisc_data *p = qdisc_priv(sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524 struct atm_flow_data *flow;
525 unsigned int len;
526
Stephen Hemminger786a9032008-01-21 02:25:29 -0800527 pr_debug("atm_tc_drop(sch %p,[qdisc %p])\n", sch, p);
David S. Miller6accec72010-07-18 19:52:55 -0700528 list_for_each_entry(flow, &p->flows, list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 if (flow->q->ops->drop && (len = flow->q->ops->drop(flow->q)))
530 return len;
David S. Miller6accec72010-07-18 19:52:55 -0700531 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532 return 0;
533}
534
Patrick McHardy1e904742008-01-22 22:11:17 -0800535static int atm_tc_init(struct Qdisc *sch, struct nlattr *opt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800537 struct atm_qdisc_data *p = qdisc_priv(sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538
Stephen Hemminger786a9032008-01-21 02:25:29 -0800539 pr_debug("atm_tc_init(sch %p,[qdisc %p],opt %p)\n", sch, p, opt);
David S. Miller6accec72010-07-18 19:52:55 -0700540 INIT_LIST_HEAD(&p->flows);
541 INIT_LIST_HEAD(&p->link.list);
542 list_add(&p->link.list, &p->flows);
Changli Gao3511c912010-10-16 13:04:08 +0000543 p->link.q = qdisc_create_dflt(sch->dev_queue,
David S. Millerbb949fb2008-07-08 16:55:56 -0700544 &pfifo_qdisc_ops, sch->handle);
Stephen Hemminger786a9032008-01-21 02:25:29 -0800545 if (!p->link.q)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546 p->link.q = &noop_qdisc;
Stephen Hemminger786a9032008-01-21 02:25:29 -0800547 pr_debug("atm_tc_init: link (%p) qdisc %p\n", &p->link, p->link.q);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548 p->link.filter_list = NULL;
549 p->link.vcc = NULL;
550 p->link.sock = NULL;
551 p->link.classid = sch->handle;
552 p->link.ref = 1;
Patrick McHardyb0188d42007-07-15 00:01:25 -0700553 tasklet_init(&p->task, sch_atm_dequeue, (unsigned long)sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554 return 0;
555}
556
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557static void atm_tc_reset(struct Qdisc *sch)
558{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800559 struct atm_qdisc_data *p = qdisc_priv(sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560 struct atm_flow_data *flow;
561
Stephen Hemminger786a9032008-01-21 02:25:29 -0800562 pr_debug("atm_tc_reset(sch %p,[qdisc %p])\n", sch, p);
David S. Miller6accec72010-07-18 19:52:55 -0700563 list_for_each_entry(flow, &p->flows, list)
Patrick McHardyb0188d42007-07-15 00:01:25 -0700564 qdisc_reset(flow->q);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565 sch->q.qlen = 0;
566}
567
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568static void atm_tc_destroy(struct Qdisc *sch)
569{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800570 struct atm_qdisc_data *p = qdisc_priv(sch);
David S. Miller6accec72010-07-18 19:52:55 -0700571 struct atm_flow_data *flow, *tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572
Stephen Hemminger786a9032008-01-21 02:25:29 -0800573 pr_debug("atm_tc_destroy(sch %p,[qdisc %p])\n", sch, p);
David S. Miller6accec72010-07-18 19:52:55 -0700574 list_for_each_entry(flow, &p->flows, list)
Patrick McHardya4aebb82008-07-01 19:53:09 -0700575 tcf_destroy_chain(&flow->filter_list);
576
David S. Miller6accec72010-07-18 19:52:55 -0700577 list_for_each_entry_safe(flow, tmp, &p->flows, list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578 if (flow->ref > 1)
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000579 pr_err("atm_destroy: %p->ref = %d\n", flow, flow->ref);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700580 atm_tc_put(sch, (unsigned long)flow);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 }
582 tasklet_kill(&p->task);
583}
584
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585static int atm_tc_dump_class(struct Qdisc *sch, unsigned long cl,
Patrick McHardyb0188d42007-07-15 00:01:25 -0700586 struct sk_buff *skb, struct tcmsg *tcm)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800588 struct atm_qdisc_data *p = qdisc_priv(sch);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700589 struct atm_flow_data *flow = (struct atm_flow_data *)cl;
Patrick McHardy4b3550ef2008-01-23 20:34:11 -0800590 struct nlattr *nest;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591
Stephen Hemminger786a9032008-01-21 02:25:29 -0800592 pr_debug("atm_tc_dump_class(sch %p,[qdisc %p],flow %p,skb %p,tcm %p)\n",
Patrick McHardyb0188d42007-07-15 00:01:25 -0700593 sch, p, flow, skb, tcm);
David S. Miller6accec72010-07-18 19:52:55 -0700594 if (list_empty(&flow->list))
Patrick McHardyb0188d42007-07-15 00:01:25 -0700595 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 tcm->tcm_handle = flow->classid;
Patrick McHardycdc7f8e2006-03-20 19:01:06 -0800597 tcm->tcm_info = flow->q->handle;
Patrick McHardy4b3550ef2008-01-23 20:34:11 -0800598
599 nest = nla_nest_start(skb, TCA_OPTIONS);
600 if (nest == NULL)
601 goto nla_put_failure;
602
Patrick McHardy1e904742008-01-22 22:11:17 -0800603 NLA_PUT(skb, TCA_ATM_HDR, flow->hdr_len, flow->hdr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604 if (flow->vcc) {
605 struct sockaddr_atmpvc pvc;
606 int state;
607
608 pvc.sap_family = AF_ATMPVC;
609 pvc.sap_addr.itf = flow->vcc->dev ? flow->vcc->dev->number : -1;
610 pvc.sap_addr.vpi = flow->vcc->vpi;
611 pvc.sap_addr.vci = flow->vcc->vci;
Patrick McHardy1e904742008-01-22 22:11:17 -0800612 NLA_PUT(skb, TCA_ATM_ADDR, sizeof(pvc), &pvc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613 state = ATM_VF2VS(flow->vcc->flags);
Patrick McHardy24beeab2008-01-23 20:34:48 -0800614 NLA_PUT_U32(skb, TCA_ATM_STATE, state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615 }
616 if (flow->excess)
Patrick McHardy24beeab2008-01-23 20:34:48 -0800617 NLA_PUT_U32(skb, TCA_ATM_EXCESS, flow->classid);
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000618 else
Patrick McHardy24beeab2008-01-23 20:34:48 -0800619 NLA_PUT_U32(skb, TCA_ATM_EXCESS, 0);
Patrick McHardy4b3550ef2008-01-23 20:34:11 -0800620
621 nla_nest_end(skb, nest);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 return skb->len;
623
Patrick McHardy1e904742008-01-22 22:11:17 -0800624nla_put_failure:
Patrick McHardy4b3550ef2008-01-23 20:34:11 -0800625 nla_nest_cancel(skb, nest);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626 return -1;
627}
628static int
629atm_tc_dump_class_stats(struct Qdisc *sch, unsigned long arg,
Patrick McHardyb0188d42007-07-15 00:01:25 -0700630 struct gnet_dump *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631{
Patrick McHardyb0188d42007-07-15 00:01:25 -0700632 struct atm_flow_data *flow = (struct atm_flow_data *)arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633
634 flow->qstats.qlen = flow->q->q.qlen;
635
636 if (gnet_stats_copy_basic(d, &flow->bstats) < 0 ||
637 gnet_stats_copy_queue(d, &flow->qstats) < 0)
638 return -1;
639
640 return 0;
641}
642
643static int atm_tc_dump(struct Qdisc *sch, struct sk_buff *skb)
644{
645 return 0;
646}
647
Eric Dumazet20fea082007-11-14 01:44:41 -0800648static const struct Qdisc_class_ops atm_class_ops = {
Patrick McHardyb0188d42007-07-15 00:01:25 -0700649 .graft = atm_tc_graft,
650 .leaf = atm_tc_leaf,
651 .get = atm_tc_get,
652 .put = atm_tc_put,
653 .change = atm_tc_change,
654 .delete = atm_tc_delete,
655 .walk = atm_tc_walk,
656 .tcf_chain = atm_tc_find_tcf,
657 .bind_tcf = atm_tc_bind_filter,
658 .unbind_tcf = atm_tc_put,
659 .dump = atm_tc_dump_class,
660 .dump_stats = atm_tc_dump_class_stats,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661};
662
Eric Dumazet20fea082007-11-14 01:44:41 -0800663static struct Qdisc_ops atm_qdisc_ops __read_mostly = {
Patrick McHardyb0188d42007-07-15 00:01:25 -0700664 .cl_ops = &atm_class_ops,
665 .id = "atm",
666 .priv_size = sizeof(struct atm_qdisc_data),
667 .enqueue = atm_tc_enqueue,
668 .dequeue = atm_tc_dequeue,
Jarek Poplawski8e3af972008-10-31 00:45:55 -0700669 .peek = atm_tc_peek,
Patrick McHardyb0188d42007-07-15 00:01:25 -0700670 .drop = atm_tc_drop,
671 .init = atm_tc_init,
672 .reset = atm_tc_reset,
673 .destroy = atm_tc_destroy,
674 .dump = atm_tc_dump,
675 .owner = THIS_MODULE,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676};
677
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678static int __init atm_init(void)
679{
680 return register_qdisc(&atm_qdisc_ops);
681}
682
YOSHIFUJI Hideaki10297b92007-02-09 23:25:16 +0900683static void __exit atm_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684{
685 unregister_qdisc(&atm_qdisc_ops);
686}
687
688module_init(atm_init)
689module_exit(atm_exit)
690MODULE_LICENSE("GPL");