blob: 19c00074ba1fa2118842ba3d5f6ac0011f9462bd [file] [log] [blame]
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>
6#include <linux/init.h>
7#include <linux/string.h>
8#include <linux/errno.h>
9#include <linux/skbuff.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070010#include <linux/atmdev.h>
11#include <linux/atmclip.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#include <linux/rtnetlink.h>
Patrick McHardyb0188d42007-07-15 00:01:25 -070013#include <linux/file.h> /* for fput */
Arnaldo Carvalho de Melodc5fc572007-03-25 23:06:12 -070014#include <net/netlink.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#include <net/pkt_sched.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016
Patrick McHardyb0188d42007-07-15 00:01:25 -070017extern struct socket *sockfd_lookup(int fd, int *err); /* @@@ fix this */
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. */
Linus Torvalds1da177e2005-04-16 15:20:36 -070044 struct tcf_proto *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 */
52 struct gnet_stats_basic bstats;
53 struct gnet_stats_queue qstats;
Linus Torvalds1da177e2005-04-16 15:20:36 -070054 struct atm_flow_data *next;
55 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 */
63 struct atm_flow_data *flows; /* NB: "link" is also on this
64 list */
65 struct tasklet_struct task; /* requeue tasklet */
66};
67
Linus Torvalds1da177e2005-04-16 15:20:36 -070068/* ------------------------- Class/flow operations ------------------------- */
69
Patrick McHardyb0188d42007-07-15 00:01:25 -070070static int find_flow(struct atm_qdisc_data *qdisc, struct atm_flow_data *flow)
Linus Torvalds1da177e2005-04-16 15:20:36 -070071{
72 struct atm_flow_data *walk;
73
Stephen Hemminger786a9032008-01-21 02:25:29 -080074 pr_debug("find_flow(qdisc %p,flow %p)\n", qdisc, flow);
Linus Torvalds1da177e2005-04-16 15:20:36 -070075 for (walk = qdisc->flows; walk; walk = walk->next)
Patrick McHardyb0188d42007-07-15 00:01:25 -070076 if (walk == flow)
77 return 1;
Stephen Hemminger786a9032008-01-21 02:25:29 -080078 pr_debug("find_flow: not found\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 return 0;
80}
81
Patrick McHardyb0188d42007-07-15 00:01:25 -070082static inline struct atm_flow_data *lookup_flow(struct Qdisc *sch, u32 classid)
Linus Torvalds1da177e2005-04-16 15:20:36 -070083{
Stephen Hemminger786a9032008-01-21 02:25:29 -080084 struct atm_qdisc_data *p = qdisc_priv(sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 struct atm_flow_data *flow;
86
YOSHIFUJI Hideaki10297b92007-02-09 23:25:16 +090087 for (flow = p->flows; flow; flow = flow->next)
Patrick McHardyb0188d42007-07-15 00:01:25 -070088 if (flow->classid == classid)
89 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 return flow;
91}
92
Patrick McHardyb0188d42007-07-15 00:01:25 -070093static int atm_tc_graft(struct Qdisc *sch, unsigned long arg,
94 struct Qdisc *new, struct Qdisc **old)
Linus Torvalds1da177e2005-04-16 15:20:36 -070095{
Stephen Hemminger786a9032008-01-21 02:25:29 -080096 struct atm_qdisc_data *p = qdisc_priv(sch);
Patrick McHardyb0188d42007-07-15 00:01:25 -070097 struct atm_flow_data *flow = (struct atm_flow_data *)arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -070098
Stephen Hemminger786a9032008-01-21 02:25:29 -080099 pr_debug("atm_tc_graft(sch %p,[qdisc %p],flow %p,new %p,old %p)\n",
Patrick McHardyb0188d42007-07-15 00:01:25 -0700100 sch, p, flow, new, old);
101 if (!find_flow(p, flow))
102 return -EINVAL;
103 if (!new)
104 new = &noop_qdisc;
105 *old = xchg(&flow->q, new);
106 if (*old)
107 qdisc_reset(*old);
YOSHIFUJI Hideaki10297b92007-02-09 23:25:16 +0900108 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109}
110
Patrick McHardyb0188d42007-07-15 00:01:25 -0700111static struct Qdisc *atm_tc_leaf(struct Qdisc *sch, unsigned long cl)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112{
Patrick McHardyb0188d42007-07-15 00:01:25 -0700113 struct atm_flow_data *flow = (struct atm_flow_data *)cl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114
Stephen Hemminger786a9032008-01-21 02:25:29 -0800115 pr_debug("atm_tc_leaf(sch %p,flow %p)\n", sch, flow);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 return flow ? flow->q : NULL;
117}
118
Patrick McHardyb0188d42007-07-15 00:01:25 -0700119static unsigned long atm_tc_get(struct Qdisc *sch, u32 classid)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800121 struct atm_qdisc_data *p __maybe_unused = qdisc_priv(sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 struct atm_flow_data *flow;
123
Stephen Hemminger786a9032008-01-21 02:25:29 -0800124 pr_debug("atm_tc_get(sch %p,[qdisc %p],classid %x)\n", sch, p, classid);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700125 flow = lookup_flow(sch, classid);
126 if (flow)
127 flow->ref++;
Stephen Hemminger786a9032008-01-21 02:25:29 -0800128 pr_debug("atm_tc_get: flow %p\n", flow);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700129 return (unsigned long)flow;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130}
131
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132static unsigned long atm_tc_bind_filter(struct Qdisc *sch,
Patrick McHardyb0188d42007-07-15 00:01:25 -0700133 unsigned long parent, u32 classid)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134{
Patrick McHardyb0188d42007-07-15 00:01:25 -0700135 return atm_tc_get(sch, classid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136}
137
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138/*
139 * atm_tc_put handles all destructions, including the ones that are explicitly
140 * requested (atm_tc_destroy, etc.). The assumption here is that we never drop
141 * anything that still seems to be in use.
142 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143static void atm_tc_put(struct Qdisc *sch, unsigned long cl)
144{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800145 struct atm_qdisc_data *p = qdisc_priv(sch);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700146 struct atm_flow_data *flow = (struct atm_flow_data *)cl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147 struct atm_flow_data **prev;
148
Stephen Hemminger786a9032008-01-21 02:25:29 -0800149 pr_debug("atm_tc_put(sch %p,[qdisc %p],flow %p)\n", sch, p, flow);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700150 if (--flow->ref)
151 return;
Stephen Hemminger786a9032008-01-21 02:25:29 -0800152 pr_debug("atm_tc_put: destroying\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153 for (prev = &p->flows; *prev; prev = &(*prev)->next)
Patrick McHardyb0188d42007-07-15 00:01:25 -0700154 if (*prev == flow)
155 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 if (!*prev) {
Patrick McHardyb0188d42007-07-15 00:01:25 -0700157 printk(KERN_CRIT "atm_tc_put: class %p not found\n", flow);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 return;
159 }
160 *prev = flow->next;
Stephen Hemminger786a9032008-01-21 02:25:29 -0800161 pr_debug("atm_tc_put: qdisc %p\n", flow->q);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 qdisc_destroy(flow->q);
Patrick McHardya48b5a62007-03-23 11:29:43 -0700163 tcf_destroy_chain(flow->filter_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 if (flow->sock) {
Stephen Hemminger786a9032008-01-21 02:25:29 -0800165 pr_debug("atm_tc_put: f_count %d\n",
Patrick McHardyb0188d42007-07-15 00:01:25 -0700166 file_count(flow->sock->file));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 flow->vcc->pop = flow->old_pop;
168 sockfd_put(flow->sock);
169 }
Patrick McHardyb0188d42007-07-15 00:01:25 -0700170 if (flow->excess)
171 atm_tc_put(sch, (unsigned long)flow->excess);
172 if (flow != &p->link)
173 kfree(flow);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174 /*
175 * If flow == &p->link, the qdisc no longer works at this point and
176 * needs to be removed. (By the caller of atm_tc_put.)
177 */
178}
179
Patrick McHardyb0188d42007-07-15 00:01:25 -0700180static void sch_atm_pop(struct atm_vcc *vcc, struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181{
182 struct atm_qdisc_data *p = VCC2FLOW(vcc)->parent;
183
Stephen Hemminger786a9032008-01-21 02:25:29 -0800184 pr_debug("sch_atm_pop(vcc %p,skb %p,[qdisc %p])\n", vcc, skb, p);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700185 VCC2FLOW(vcc)->old_pop(vcc, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 tasklet_schedule(&p->task);
187}
188
189static const u8 llc_oui_ip[] = {
Patrick McHardyb0188d42007-07-15 00:01:25 -0700190 0xaa, /* DSAP: non-ISO */
191 0xaa, /* SSAP: non-ISO */
192 0x03, /* Ctrl: Unnumbered Information Command PDU */
193 0x00, /* OUI: EtherType */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 0x00, 0x00,
Patrick McHardyb0188d42007-07-15 00:01:25 -0700195 0x08, 0x00
196}; /* Ethertype IP (0800) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197
198static int atm_tc_change(struct Qdisc *sch, u32 classid, u32 parent,
Patrick McHardy1e904742008-01-22 22:11:17 -0800199 struct nlattr **tca, unsigned long *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800201 struct atm_qdisc_data *p = qdisc_priv(sch);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700202 struct atm_flow_data *flow = (struct atm_flow_data *)*arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 struct atm_flow_data *excess = NULL;
Patrick McHardy1e904742008-01-22 22:11:17 -0800204 struct nlattr *opt = tca[TCA_OPTIONS];
205 struct nlattr *tb[TCA_ATM_MAX + 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206 struct socket *sock;
Patrick McHardyb0188d42007-07-15 00:01:25 -0700207 int fd, error, hdr_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 void *hdr;
209
Stephen Hemminger786a9032008-01-21 02:25:29 -0800210 pr_debug("atm_tc_change(sch %p,[qdisc %p],classid %x,parent %x,"
Patrick McHardyb0188d42007-07-15 00:01:25 -0700211 "flow %p,opt %p)\n", sch, p, classid, parent, flow, opt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 /*
213 * The concept of parents doesn't apply for this qdisc.
214 */
215 if (parent && parent != TC_H_ROOT && parent != sch->handle)
216 return -EINVAL;
217 /*
218 * ATM classes cannot be changed. In order to change properties of the
219 * ATM connection, that socket needs to be modified directly (via the
220 * native ATM API. In order to send a flow to a different VC, the old
221 * class needs to be removed and a new one added. (This may be changed
222 * later.)
223 */
Patrick McHardyb0188d42007-07-15 00:01:25 -0700224 if (flow)
225 return -EBUSY;
Patrick McHardycee63722008-01-23 20:33:32 -0800226 if (opt == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 return -EINVAL;
Patrick McHardycee63722008-01-23 20:33:32 -0800228 error = nla_parse_nested(tb, TCA_ATM_MAX, opt, NULL);
229 if (error < 0)
230 return error;
231
Patrick McHardy1e904742008-01-22 22:11:17 -0800232 if (!tb[TCA_ATM_FD] || nla_len(tb[TCA_ATM_FD]) < sizeof(fd))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 return -EINVAL;
Patrick McHardy1e904742008-01-22 22:11:17 -0800234 fd = *(int *)nla_data(tb[TCA_ATM_FD]);
Stephen Hemminger786a9032008-01-21 02:25:29 -0800235 pr_debug("atm_tc_change: fd %d\n", fd);
Patrick McHardy1e904742008-01-22 22:11:17 -0800236 if (tb[TCA_ATM_HDR]) {
237 hdr_len = nla_len(tb[TCA_ATM_HDR]);
238 hdr = nla_data(tb[TCA_ATM_HDR]);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700239 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 hdr_len = RFC1483LLC_LEN;
Patrick McHardyb0188d42007-07-15 00:01:25 -0700241 hdr = NULL; /* default LLC/SNAP for IP */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 }
Patrick McHardy1e904742008-01-22 22:11:17 -0800243 if (!tb[TCA_ATM_EXCESS])
Patrick McHardyb0188d42007-07-15 00:01:25 -0700244 excess = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 else {
Patrick McHardy1e904742008-01-22 22:11:17 -0800246 if (nla_len(tb[TCA_ATM_EXCESS]) != sizeof(u32))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 return -EINVAL;
Patrick McHardyb0188d42007-07-15 00:01:25 -0700248 excess = (struct atm_flow_data *)
Patrick McHardy1e904742008-01-22 22:11:17 -0800249 atm_tc_get(sch, *(u32 *)nla_data(tb[TCA_ATM_EXCESS]));
Patrick McHardyb0188d42007-07-15 00:01:25 -0700250 if (!excess)
251 return -ENOENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252 }
Patrick McHardyf5e5cb72008-01-23 20:32:06 -0800253 pr_debug("atm_tc_change: type %d, payload %d, hdr_len %d\n",
Patrick McHardy1e904742008-01-22 22:11:17 -0800254 opt->nla_type, nla_len(opt), hdr_len);
Stephen Hemminger786a9032008-01-21 02:25:29 -0800255 sock = sockfd_lookup(fd, &error);
256 if (!sock)
Patrick McHardyb0188d42007-07-15 00:01:25 -0700257 return error; /* f_count++ */
Stephen Hemminger786a9032008-01-21 02:25:29 -0800258 pr_debug("atm_tc_change: f_count %d\n", file_count(sock->file));
YOSHIFUJI Hideaki10297b92007-02-09 23:25:16 +0900259 if (sock->ops->family != PF_ATMSVC && sock->ops->family != PF_ATMPVC) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 error = -EPROTOTYPE;
YOSHIFUJI Hideaki10297b92007-02-09 23:25:16 +0900261 goto err_out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 }
263 /* @@@ should check if the socket is really operational or we'll crash
264 on vcc->send */
265 if (classid) {
266 if (TC_H_MAJ(classid ^ sch->handle)) {
Stephen Hemminger786a9032008-01-21 02:25:29 -0800267 pr_debug("atm_tc_change: classid mismatch\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 error = -EINVAL;
269 goto err_out;
270 }
Patrick McHardyb0188d42007-07-15 00:01:25 -0700271 if (find_flow(p, flow)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 error = -EEXIST;
273 goto err_out;
274 }
Patrick McHardyb0188d42007-07-15 00:01:25 -0700275 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 int i;
277 unsigned long cl;
278
279 for (i = 1; i < 0x8000; i++) {
Patrick McHardyb0188d42007-07-15 00:01:25 -0700280 classid = TC_H_MAKE(sch->handle, 0x8000 | i);
Stephen Hemminger786a9032008-01-21 02:25:29 -0800281 cl = atm_tc_get(sch, classid);
282 if (!cl)
Patrick McHardyb0188d42007-07-15 00:01:25 -0700283 break;
284 atm_tc_put(sch, cl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 }
286 }
Stephen Hemminger786a9032008-01-21 02:25:29 -0800287 pr_debug("atm_tc_change: new id %x\n", classid);
vignesh babu782f7952007-07-16 18:30:36 -0700288 flow = kzalloc(sizeof(struct atm_flow_data) + hdr_len, GFP_KERNEL);
Stephen Hemminger786a9032008-01-21 02:25:29 -0800289 pr_debug("atm_tc_change: flow %p\n", flow);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 if (!flow) {
291 error = -ENOBUFS;
292 goto err_out;
293 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294 flow->filter_list = NULL;
Stephen Hemminger786a9032008-01-21 02:25:29 -0800295 flow->q = qdisc_create_dflt(sch->dev, &pfifo_qdisc_ops, classid);
296 if (!flow->q)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 flow->q = &noop_qdisc;
Stephen Hemminger786a9032008-01-21 02:25:29 -0800298 pr_debug("atm_tc_change: qdisc %p\n", flow->q);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 flow->sock = sock;
Patrick McHardyb0188d42007-07-15 00:01:25 -0700300 flow->vcc = ATM_SD(sock); /* speedup */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 flow->vcc->user_back = flow;
Stephen Hemminger786a9032008-01-21 02:25:29 -0800302 pr_debug("atm_tc_change: vcc %p\n", flow->vcc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 flow->old_pop = flow->vcc->pop;
304 flow->parent = p;
305 flow->vcc->pop = sch_atm_pop;
306 flow->classid = classid;
307 flow->ref = 1;
308 flow->excess = excess;
309 flow->next = p->link.next;
310 p->link.next = flow;
311 flow->hdr_len = hdr_len;
312 if (hdr)
Patrick McHardyb0188d42007-07-15 00:01:25 -0700313 memcpy(flow->hdr, hdr, hdr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 else
Patrick McHardyb0188d42007-07-15 00:01:25 -0700315 memcpy(flow->hdr, llc_oui_ip, sizeof(llc_oui_ip));
316 *arg = (unsigned long)flow;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 return 0;
318err_out:
Patrick McHardyb0188d42007-07-15 00:01:25 -0700319 if (excess)
320 atm_tc_put(sch, (unsigned long)excess);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 sockfd_put(sock);
322 return error;
323}
324
Patrick McHardyb0188d42007-07-15 00:01:25 -0700325static int atm_tc_delete(struct Qdisc *sch, unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800327 struct atm_qdisc_data *p = qdisc_priv(sch);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700328 struct atm_flow_data *flow = (struct atm_flow_data *)arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329
Stephen Hemminger786a9032008-01-21 02:25:29 -0800330 pr_debug("atm_tc_delete(sch %p,[qdisc %p],flow %p)\n", sch, p, flow);
331 if (!find_flow(qdisc_priv(sch), flow))
Patrick McHardyb0188d42007-07-15 00:01:25 -0700332 return -EINVAL;
333 if (flow->filter_list || flow == &p->link)
334 return -EBUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335 /*
336 * Reference count must be 2: one for "keepalive" (set at class
337 * creation), and one for the reference held when calling delete.
338 */
339 if (flow->ref < 2) {
Patrick McHardyb0188d42007-07-15 00:01:25 -0700340 printk(KERN_ERR "atm_tc_delete: flow->ref == %d\n", flow->ref);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341 return -EINVAL;
342 }
Patrick McHardyb0188d42007-07-15 00:01:25 -0700343 if (flow->ref > 2)
344 return -EBUSY; /* catch references via excess, etc. */
345 atm_tc_put(sch, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 return 0;
347}
348
Patrick McHardyb0188d42007-07-15 00:01:25 -0700349static void atm_tc_walk(struct Qdisc *sch, struct qdisc_walker *walker)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800351 struct atm_qdisc_data *p = qdisc_priv(sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 struct atm_flow_data *flow;
353
Stephen Hemminger786a9032008-01-21 02:25:29 -0800354 pr_debug("atm_tc_walk(sch %p,[qdisc %p],walker %p)\n", sch, p, walker);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700355 if (walker->stop)
356 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357 for (flow = p->flows; flow; flow = flow->next) {
358 if (walker->count >= walker->skip)
Patrick McHardyb0188d42007-07-15 00:01:25 -0700359 if (walker->fn(sch, (unsigned long)flow, walker) < 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 walker->stop = 1;
361 break;
362 }
363 walker->count++;
364 }
365}
366
Patrick McHardyb0188d42007-07-15 00:01:25 -0700367static struct tcf_proto **atm_tc_find_tcf(struct Qdisc *sch, unsigned long cl)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800369 struct atm_qdisc_data *p = qdisc_priv(sch);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700370 struct atm_flow_data *flow = (struct atm_flow_data *)cl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371
Stephen Hemminger786a9032008-01-21 02:25:29 -0800372 pr_debug("atm_tc_find_tcf(sch %p,[qdisc %p],flow %p)\n", sch, p, flow);
YOSHIFUJI Hideaki10297b92007-02-09 23:25:16 +0900373 return flow ? &flow->filter_list : &p->link.filter_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374}
375
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376/* --------------------------- Qdisc operations ---------------------------- */
377
Patrick McHardyb0188d42007-07-15 00:01:25 -0700378static int atm_tc_enqueue(struct sk_buff *skb, struct Qdisc *sch)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800380 struct atm_qdisc_data *p = qdisc_priv(sch);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700381 struct atm_flow_data *flow = NULL; /* @@@ */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 struct tcf_result res;
383 int result;
384 int ret = NET_XMIT_POLICED;
385
Stephen Hemminger786a9032008-01-21 02:25:29 -0800386 pr_debug("atm_tc_enqueue(skb %p,sch %p,[qdisc %p])\n", skb, sch, p);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700387 result = TC_POLICE_OK; /* be nice to gcc */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 if (TC_H_MAJ(skb->priority) != sch->handle ||
Patrick McHardyb0188d42007-07-15 00:01:25 -0700389 !(flow = (struct atm_flow_data *)atm_tc_get(sch, skb->priority)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 for (flow = p->flows; flow; flow = flow->next)
391 if (flow->filter_list) {
Patrick McHardy73ca4912007-07-15 00:02:31 -0700392 result = tc_classify_compat(skb,
393 flow->filter_list,
394 &res);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700395 if (result < 0)
396 continue;
397 flow = (struct atm_flow_data *)res.class;
398 if (!flow)
399 flow = lookup_flow(sch, res.classid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 break;
401 }
Patrick McHardyb0188d42007-07-15 00:01:25 -0700402 if (!flow)
403 flow = &p->link;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404 else {
405 if (flow->vcc)
406 ATM_SKB(skb)->atm_options = flow->vcc->atm_options;
Patrick McHardyb0188d42007-07-15 00:01:25 -0700407 /*@@@ looks good ... but it's not supposed to work :-) */
Patrick McHardy92100802007-07-15 00:01:49 -0700408#ifdef CONFIG_NET_CLS_ACT
409 switch (result) {
410 case TC_ACT_QUEUED:
411 case TC_ACT_STOLEN:
412 kfree_skb(skb);
413 return NET_XMIT_SUCCESS;
414 case TC_ACT_SHOT:
415 kfree_skb(skb);
416 goto drop;
Patrick McHardy73ca4912007-07-15 00:02:31 -0700417 case TC_POLICE_RECLASSIFY:
418 if (flow->excess)
419 flow = flow->excess;
420 else
421 ATM_SKB(skb)->atm_options |= ATM_ATMOPT_CLP;
422 break;
Patrick McHardy92100802007-07-15 00:01:49 -0700423 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424#endif
425 }
Patrick McHardyc3bc7cf2007-07-15 00:03:05 -0700426
Stephen Hemminger786a9032008-01-21 02:25:29 -0800427 ret = flow->q->enqueue(skb, flow->q);
428 if (ret != 0) {
Patrick McHardy92100802007-07-15 00:01:49 -0700429drop: __maybe_unused
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430 sch->qstats.drops++;
Patrick McHardyb0188d42007-07-15 00:01:25 -0700431 if (flow)
432 flow->qstats.drops++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433 return ret;
434 }
435 sch->bstats.bytes += skb->len;
436 sch->bstats.packets++;
437 flow->bstats.bytes += skb->len;
438 flow->bstats.packets++;
439 /*
440 * Okay, this may seem weird. We pretend we've dropped the packet if
441 * it goes via ATM. The reason for this is that the outer qdisc
442 * expects to be able to q->dequeue the packet later on if we return
443 * success at this place. Also, sch->q.qdisc needs to reflect whether
444 * there is a packet egligible for dequeuing or not. Note that the
445 * statistics of the outer qdisc are necessarily wrong because of all
446 * this. There's currently no correct solution for this.
447 */
448 if (flow == &p->link) {
449 sch->q.qlen++;
450 return 0;
451 }
452 tasklet_schedule(&p->task);
453 return NET_XMIT_BYPASS;
454}
455
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456/*
457 * Dequeue packets and send them over ATM. Note that we quite deliberately
458 * avoid checking net_device's flow control here, simply because sch_atm
459 * uses its own channels, which have nothing to do with any CLIP/LANE/or
460 * non-ATM interfaces.
461 */
462
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463static void sch_atm_dequeue(unsigned long data)
464{
Patrick McHardyb0188d42007-07-15 00:01:25 -0700465 struct Qdisc *sch = (struct Qdisc *)data;
Stephen Hemminger786a9032008-01-21 02:25:29 -0800466 struct atm_qdisc_data *p = qdisc_priv(sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467 struct atm_flow_data *flow;
468 struct sk_buff *skb;
469
Stephen Hemminger786a9032008-01-21 02:25:29 -0800470 pr_debug("sch_atm_dequeue(sch %p,[qdisc %p])\n", sch, p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 for (flow = p->link.next; flow; flow = flow->next)
472 /*
473 * If traffic is properly shaped, this won't generate nasty
474 * little bursts. Otherwise, it may ... (but that's okay)
475 */
476 while ((skb = flow->q->dequeue(flow->q))) {
Patrick McHardyb0188d42007-07-15 00:01:25 -0700477 if (!atm_may_send(flow->vcc, skb->truesize)) {
478 (void)flow->q->ops->requeue(skb, flow->q);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479 break;
480 }
Stephen Hemminger786a9032008-01-21 02:25:29 -0800481 pr_debug("atm_tc_dequeue: sending on class %p\n", flow);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 /* remove any LL header somebody else has attached */
Arnaldo Carvalho de Meloeddc9ec2007-04-20 22:47:35 -0700483 skb_pull(skb, skb_network_offset(skb));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484 if (skb_headroom(skb) < flow->hdr_len) {
485 struct sk_buff *new;
486
Patrick McHardyb0188d42007-07-15 00:01:25 -0700487 new = skb_realloc_headroom(skb, flow->hdr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 dev_kfree_skb(skb);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700489 if (!new)
490 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 skb = new;
492 }
Stephen Hemminger786a9032008-01-21 02:25:29 -0800493 pr_debug("sch_atm_dequeue: ip %p, data %p\n",
Arnaldo Carvalho de Meloeddc9ec2007-04-20 22:47:35 -0700494 skb_network_header(skb), skb->data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 ATM_SKB(skb)->vcc = flow->vcc;
Patrick McHardyb0188d42007-07-15 00:01:25 -0700496 memcpy(skb_push(skb, flow->hdr_len), flow->hdr,
497 flow->hdr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 atomic_add(skb->truesize,
499 &sk_atm(flow->vcc)->sk_wmem_alloc);
500 /* atm.atm_options are already set by atm_tc_enqueue */
Patrick McHardyb0188d42007-07-15 00:01:25 -0700501 flow->vcc->send(flow->vcc, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502 }
503}
504
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505static struct sk_buff *atm_tc_dequeue(struct Qdisc *sch)
506{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800507 struct atm_qdisc_data *p = qdisc_priv(sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508 struct sk_buff *skb;
509
Stephen Hemminger786a9032008-01-21 02:25:29 -0800510 pr_debug("atm_tc_dequeue(sch %p,[qdisc %p])\n", sch, p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511 tasklet_schedule(&p->task);
512 skb = p->link.q->dequeue(p->link.q);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700513 if (skb)
514 sch->q.qlen--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 return skb;
516}
517
Patrick McHardyb0188d42007-07-15 00:01:25 -0700518static int atm_tc_requeue(struct sk_buff *skb, struct Qdisc *sch)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800520 struct atm_qdisc_data *p = qdisc_priv(sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521 int ret;
522
Stephen Hemminger786a9032008-01-21 02:25:29 -0800523 pr_debug("atm_tc_requeue(skb %p,sch %p,[qdisc %p])\n", skb, sch, p);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700524 ret = p->link.q->ops->requeue(skb, p->link.q);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 if (!ret) {
Patrick McHardyb0188d42007-07-15 00:01:25 -0700526 sch->q.qlen++;
527 sch->qstats.requeues++;
528 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 sch->qstats.drops++;
530 p->link.qstats.drops++;
531 }
532 return ret;
533}
534
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535static unsigned int atm_tc_drop(struct Qdisc *sch)
536{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800537 struct atm_qdisc_data *p = qdisc_priv(sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538 struct atm_flow_data *flow;
539 unsigned int len;
540
Stephen Hemminger786a9032008-01-21 02:25:29 -0800541 pr_debug("atm_tc_drop(sch %p,[qdisc %p])\n", sch, p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542 for (flow = p->flows; flow; flow = flow->next)
543 if (flow->q->ops->drop && (len = flow->q->ops->drop(flow->q)))
544 return len;
545 return 0;
546}
547
Patrick McHardy1e904742008-01-22 22:11:17 -0800548static int atm_tc_init(struct Qdisc *sch, struct nlattr *opt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800550 struct atm_qdisc_data *p = qdisc_priv(sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551
Stephen Hemminger786a9032008-01-21 02:25:29 -0800552 pr_debug("atm_tc_init(sch %p,[qdisc %p],opt %p)\n", sch, p, opt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553 p->flows = &p->link;
Stephen Hemminger786a9032008-01-21 02:25:29 -0800554 p->link.q = qdisc_create_dflt(sch->dev, &pfifo_qdisc_ops, sch->handle);
555 if (!p->link.q)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 p->link.q = &noop_qdisc;
Stephen Hemminger786a9032008-01-21 02:25:29 -0800557 pr_debug("atm_tc_init: link (%p) qdisc %p\n", &p->link, p->link.q);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558 p->link.filter_list = NULL;
559 p->link.vcc = NULL;
560 p->link.sock = NULL;
561 p->link.classid = sch->handle;
562 p->link.ref = 1;
563 p->link.next = NULL;
Patrick McHardyb0188d42007-07-15 00:01:25 -0700564 tasklet_init(&p->task, sch_atm_dequeue, (unsigned long)sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565 return 0;
566}
567
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568static void atm_tc_reset(struct Qdisc *sch)
569{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800570 struct atm_qdisc_data *p = qdisc_priv(sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571 struct atm_flow_data *flow;
572
Stephen Hemminger786a9032008-01-21 02:25:29 -0800573 pr_debug("atm_tc_reset(sch %p,[qdisc %p])\n", sch, p);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700574 for (flow = p->flows; flow; flow = flow->next)
575 qdisc_reset(flow->q);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576 sch->q.qlen = 0;
577}
578
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579static void atm_tc_destroy(struct Qdisc *sch)
580{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800581 struct atm_qdisc_data *p = qdisc_priv(sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582 struct atm_flow_data *flow;
583
Stephen Hemminger786a9032008-01-21 02:25:29 -0800584 pr_debug("atm_tc_destroy(sch %p,[qdisc %p])\n", sch, p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585 /* races ? */
586 while ((flow = p->flows)) {
Patrick McHardya48b5a62007-03-23 11:29:43 -0700587 tcf_destroy_chain(flow->filter_list);
Patrick McHardyb00b4bf2007-06-05 16:06:59 -0700588 flow->filter_list = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589 if (flow->ref > 1)
Patrick McHardyb0188d42007-07-15 00:01:25 -0700590 printk(KERN_ERR "atm_destroy: %p->ref = %d\n", flow,
591 flow->ref);
592 atm_tc_put(sch, (unsigned long)flow);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 if (p->flows == flow) {
594 printk(KERN_ERR "atm_destroy: putting flow %p didn't "
Patrick McHardyb0188d42007-07-15 00:01:25 -0700595 "kill it\n", flow);
596 p->flows = flow->next; /* brute force */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597 break;
598 }
599 }
600 tasklet_kill(&p->task);
601}
602
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603static int atm_tc_dump_class(struct Qdisc *sch, unsigned long cl,
Patrick McHardyb0188d42007-07-15 00:01:25 -0700604 struct sk_buff *skb, struct tcmsg *tcm)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800606 struct atm_qdisc_data *p = qdisc_priv(sch);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700607 struct atm_flow_data *flow = (struct atm_flow_data *)cl;
Patrick McHardy4b3550ef2008-01-23 20:34:11 -0800608 struct nlattr *nest;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609
Stephen Hemminger786a9032008-01-21 02:25:29 -0800610 pr_debug("atm_tc_dump_class(sch %p,[qdisc %p],flow %p,skb %p,tcm %p)\n",
Patrick McHardyb0188d42007-07-15 00:01:25 -0700611 sch, p, flow, skb, tcm);
612 if (!find_flow(p, flow))
613 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614 tcm->tcm_handle = flow->classid;
Patrick McHardycdc7f8e2006-03-20 19:01:06 -0800615 tcm->tcm_info = flow->q->handle;
Patrick McHardy4b3550ef2008-01-23 20:34:11 -0800616
617 nest = nla_nest_start(skb, TCA_OPTIONS);
618 if (nest == NULL)
619 goto nla_put_failure;
620
Patrick McHardy1e904742008-01-22 22:11:17 -0800621 NLA_PUT(skb, TCA_ATM_HDR, flow->hdr_len, flow->hdr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 if (flow->vcc) {
623 struct sockaddr_atmpvc pvc;
624 int state;
625
626 pvc.sap_family = AF_ATMPVC;
627 pvc.sap_addr.itf = flow->vcc->dev ? flow->vcc->dev->number : -1;
628 pvc.sap_addr.vpi = flow->vcc->vpi;
629 pvc.sap_addr.vci = flow->vcc->vci;
Patrick McHardy1e904742008-01-22 22:11:17 -0800630 NLA_PUT(skb, TCA_ATM_ADDR, sizeof(pvc), &pvc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631 state = ATM_VF2VS(flow->vcc->flags);
Patrick McHardy1e904742008-01-22 22:11:17 -0800632 NLA_PUT(skb, TCA_ATM_STATE, sizeof(state), &state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 }
634 if (flow->excess)
Patrick McHardy1e904742008-01-22 22:11:17 -0800635 NLA_PUT(skb, TCA_ATM_EXCESS, sizeof(u32), &flow->classid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636 else {
637 static u32 zero;
638
Patrick McHardy1e904742008-01-22 22:11:17 -0800639 NLA_PUT(skb, TCA_ATM_EXCESS, sizeof(zero), &zero);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640 }
Patrick McHardy4b3550ef2008-01-23 20:34:11 -0800641
642 nla_nest_end(skb, nest);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643 return skb->len;
644
Patrick McHardy1e904742008-01-22 22:11:17 -0800645nla_put_failure:
Patrick McHardy4b3550ef2008-01-23 20:34:11 -0800646 nla_nest_cancel(skb, nest);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647 return -1;
648}
649static int
650atm_tc_dump_class_stats(struct Qdisc *sch, unsigned long arg,
Patrick McHardyb0188d42007-07-15 00:01:25 -0700651 struct gnet_dump *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652{
Patrick McHardyb0188d42007-07-15 00:01:25 -0700653 struct atm_flow_data *flow = (struct atm_flow_data *)arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654
655 flow->qstats.qlen = flow->q->q.qlen;
656
657 if (gnet_stats_copy_basic(d, &flow->bstats) < 0 ||
658 gnet_stats_copy_queue(d, &flow->qstats) < 0)
659 return -1;
660
661 return 0;
662}
663
664static int atm_tc_dump(struct Qdisc *sch, struct sk_buff *skb)
665{
666 return 0;
667}
668
Eric Dumazet20fea082007-11-14 01:44:41 -0800669static const struct Qdisc_class_ops atm_class_ops = {
Patrick McHardyb0188d42007-07-15 00:01:25 -0700670 .graft = atm_tc_graft,
671 .leaf = atm_tc_leaf,
672 .get = atm_tc_get,
673 .put = atm_tc_put,
674 .change = atm_tc_change,
675 .delete = atm_tc_delete,
676 .walk = atm_tc_walk,
677 .tcf_chain = atm_tc_find_tcf,
678 .bind_tcf = atm_tc_bind_filter,
679 .unbind_tcf = atm_tc_put,
680 .dump = atm_tc_dump_class,
681 .dump_stats = atm_tc_dump_class_stats,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682};
683
Eric Dumazet20fea082007-11-14 01:44:41 -0800684static struct Qdisc_ops atm_qdisc_ops __read_mostly = {
Patrick McHardyb0188d42007-07-15 00:01:25 -0700685 .cl_ops = &atm_class_ops,
686 .id = "atm",
687 .priv_size = sizeof(struct atm_qdisc_data),
688 .enqueue = atm_tc_enqueue,
689 .dequeue = atm_tc_dequeue,
690 .requeue = atm_tc_requeue,
691 .drop = atm_tc_drop,
692 .init = atm_tc_init,
693 .reset = atm_tc_reset,
694 .destroy = atm_tc_destroy,
695 .dump = atm_tc_dump,
696 .owner = THIS_MODULE,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697};
698
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699static int __init atm_init(void)
700{
701 return register_qdisc(&atm_qdisc_ops);
702}
703
YOSHIFUJI Hideaki10297b92007-02-09 23:25:16 +0900704static void __exit atm_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705{
706 unregister_qdisc(&atm_qdisc_ops);
707}
708
709module_init(atm_init)
710module_exit(atm_exit)
711MODULE_LICENSE("GPL");