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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>
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 McHardyff31ab52008-07-01 19:52:38 -0700163 tcf_destroy_chain(&flow->filter_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 if (flow->sock) {
Al Viro516e0cc2008-07-26 00:39:17 -0400165 pr_debug("atm_tc_put: f_count %ld\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
Patrick McHardy27a34212008-01-23 20:35:39 -0800198static const struct nla_policy atm_policy[TCA_ATM_MAX + 1] = {
199 [TCA_ATM_FD] = { .type = NLA_U32 },
200 [TCA_ATM_EXCESS] = { .type = NLA_U32 },
201};
202
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203static int atm_tc_change(struct Qdisc *sch, u32 classid, u32 parent,
Patrick McHardy1e904742008-01-22 22:11:17 -0800204 struct nlattr **tca, unsigned long *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800206 struct atm_qdisc_data *p = qdisc_priv(sch);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700207 struct atm_flow_data *flow = (struct atm_flow_data *)*arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 struct atm_flow_data *excess = NULL;
Patrick McHardy1e904742008-01-22 22:11:17 -0800209 struct nlattr *opt = tca[TCA_OPTIONS];
210 struct nlattr *tb[TCA_ATM_MAX + 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 struct socket *sock;
Patrick McHardyb0188d42007-07-15 00:01:25 -0700212 int fd, error, hdr_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 void *hdr;
214
Stephen Hemminger786a9032008-01-21 02:25:29 -0800215 pr_debug("atm_tc_change(sch %p,[qdisc %p],classid %x,parent %x,"
Patrick McHardyb0188d42007-07-15 00:01:25 -0700216 "flow %p,opt %p)\n", sch, p, classid, parent, flow, opt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 /*
218 * The concept of parents doesn't apply for this qdisc.
219 */
220 if (parent && parent != TC_H_ROOT && parent != sch->handle)
221 return -EINVAL;
222 /*
223 * ATM classes cannot be changed. In order to change properties of the
224 * ATM connection, that socket needs to be modified directly (via the
225 * native ATM API. In order to send a flow to a different VC, the old
226 * class needs to be removed and a new one added. (This may be changed
227 * later.)
228 */
Patrick McHardyb0188d42007-07-15 00:01:25 -0700229 if (flow)
230 return -EBUSY;
Patrick McHardycee63722008-01-23 20:33:32 -0800231 if (opt == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 return -EINVAL;
Patrick McHardy27a34212008-01-23 20:35:39 -0800233
234 error = nla_parse_nested(tb, TCA_ATM_MAX, opt, atm_policy);
Patrick McHardycee63722008-01-23 20:33:32 -0800235 if (error < 0)
236 return error;
237
Patrick McHardy27a34212008-01-23 20:35:39 -0800238 if (!tb[TCA_ATM_FD])
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 return -EINVAL;
Patrick McHardy1587bac2008-01-23 20:35:03 -0800240 fd = nla_get_u32(tb[TCA_ATM_FD]);
Stephen Hemminger786a9032008-01-21 02:25:29 -0800241 pr_debug("atm_tc_change: fd %d\n", fd);
Patrick McHardy1e904742008-01-22 22:11:17 -0800242 if (tb[TCA_ATM_HDR]) {
243 hdr_len = nla_len(tb[TCA_ATM_HDR]);
244 hdr = nla_data(tb[TCA_ATM_HDR]);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700245 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 hdr_len = RFC1483LLC_LEN;
Patrick McHardyb0188d42007-07-15 00:01:25 -0700247 hdr = NULL; /* default LLC/SNAP for IP */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 }
Patrick McHardy1e904742008-01-22 22:11:17 -0800249 if (!tb[TCA_ATM_EXCESS])
Patrick McHardyb0188d42007-07-15 00:01:25 -0700250 excess = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 else {
Patrick McHardyb0188d42007-07-15 00:01:25 -0700252 excess = (struct atm_flow_data *)
Patrick McHardy1587bac2008-01-23 20:35:03 -0800253 atm_tc_get(sch, nla_get_u32(tb[TCA_ATM_EXCESS]));
Patrick McHardyb0188d42007-07-15 00:01:25 -0700254 if (!excess)
255 return -ENOENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 }
Patrick McHardyf5e5cb72008-01-23 20:32:06 -0800257 pr_debug("atm_tc_change: type %d, payload %d, hdr_len %d\n",
Patrick McHardy1e904742008-01-22 22:11:17 -0800258 opt->nla_type, nla_len(opt), hdr_len);
Stephen Hemminger786a9032008-01-21 02:25:29 -0800259 sock = sockfd_lookup(fd, &error);
260 if (!sock)
Patrick McHardyb0188d42007-07-15 00:01:25 -0700261 return error; /* f_count++ */
Al Viro516e0cc2008-07-26 00:39:17 -0400262 pr_debug("atm_tc_change: f_count %ld\n", file_count(sock->file));
YOSHIFUJI Hideaki10297b92007-02-09 23:25:16 +0900263 if (sock->ops->family != PF_ATMSVC && sock->ops->family != PF_ATMPVC) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 error = -EPROTOTYPE;
YOSHIFUJI Hideaki10297b92007-02-09 23:25:16 +0900265 goto err_out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 }
267 /* @@@ should check if the socket is really operational or we'll crash
268 on vcc->send */
269 if (classid) {
270 if (TC_H_MAJ(classid ^ sch->handle)) {
Stephen Hemminger786a9032008-01-21 02:25:29 -0800271 pr_debug("atm_tc_change: classid mismatch\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 error = -EINVAL;
273 goto err_out;
274 }
Patrick McHardyb0188d42007-07-15 00:01:25 -0700275 if (find_flow(p, flow)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 error = -EEXIST;
277 goto err_out;
278 }
Patrick McHardyb0188d42007-07-15 00:01:25 -0700279 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 int i;
281 unsigned long cl;
282
283 for (i = 1; i < 0x8000; i++) {
Patrick McHardyb0188d42007-07-15 00:01:25 -0700284 classid = TC_H_MAKE(sch->handle, 0x8000 | i);
Stephen Hemminger786a9032008-01-21 02:25:29 -0800285 cl = atm_tc_get(sch, classid);
286 if (!cl)
Patrick McHardyb0188d42007-07-15 00:01:25 -0700287 break;
288 atm_tc_put(sch, cl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 }
290 }
Stephen Hemminger786a9032008-01-21 02:25:29 -0800291 pr_debug("atm_tc_change: new id %x\n", classid);
vignesh babu782f7952007-07-16 18:30:36 -0700292 flow = kzalloc(sizeof(struct atm_flow_data) + hdr_len, GFP_KERNEL);
Stephen Hemminger786a9032008-01-21 02:25:29 -0800293 pr_debug("atm_tc_change: flow %p\n", flow);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294 if (!flow) {
295 error = -ENOBUFS;
296 goto err_out;
297 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298 flow->filter_list = NULL;
David S. Miller5ce2d482008-07-08 17:06:30 -0700299 flow->q = qdisc_create_dflt(qdisc_dev(sch), sch->dev_queue,
David S. Millerbb949fb2008-07-08 16:55:56 -0700300 &pfifo_qdisc_ops, classid);
Stephen Hemminger786a9032008-01-21 02:25:29 -0800301 if (!flow->q)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302 flow->q = &noop_qdisc;
Stephen Hemminger786a9032008-01-21 02:25:29 -0800303 pr_debug("atm_tc_change: qdisc %p\n", flow->q);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 flow->sock = sock;
Patrick McHardyb0188d42007-07-15 00:01:25 -0700305 flow->vcc = ATM_SD(sock); /* speedup */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 flow->vcc->user_back = flow;
Stephen Hemminger786a9032008-01-21 02:25:29 -0800307 pr_debug("atm_tc_change: vcc %p\n", flow->vcc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 flow->old_pop = flow->vcc->pop;
309 flow->parent = p;
310 flow->vcc->pop = sch_atm_pop;
311 flow->classid = classid;
312 flow->ref = 1;
313 flow->excess = excess;
314 flow->next = p->link.next;
315 p->link.next = flow;
316 flow->hdr_len = hdr_len;
317 if (hdr)
Patrick McHardyb0188d42007-07-15 00:01:25 -0700318 memcpy(flow->hdr, hdr, hdr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 else
Patrick McHardyb0188d42007-07-15 00:01:25 -0700320 memcpy(flow->hdr, llc_oui_ip, sizeof(llc_oui_ip));
321 *arg = (unsigned long)flow;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 return 0;
323err_out:
Patrick McHardyb0188d42007-07-15 00:01:25 -0700324 if (excess)
325 atm_tc_put(sch, (unsigned long)excess);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 sockfd_put(sock);
327 return error;
328}
329
Patrick McHardyb0188d42007-07-15 00:01:25 -0700330static int atm_tc_delete(struct Qdisc *sch, unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800332 struct atm_qdisc_data *p = qdisc_priv(sch);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700333 struct atm_flow_data *flow = (struct atm_flow_data *)arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334
Stephen Hemminger786a9032008-01-21 02:25:29 -0800335 pr_debug("atm_tc_delete(sch %p,[qdisc %p],flow %p)\n", sch, p, flow);
336 if (!find_flow(qdisc_priv(sch), flow))
Patrick McHardyb0188d42007-07-15 00:01:25 -0700337 return -EINVAL;
338 if (flow->filter_list || flow == &p->link)
339 return -EBUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 /*
341 * Reference count must be 2: one for "keepalive" (set at class
342 * creation), and one for the reference held when calling delete.
343 */
344 if (flow->ref < 2) {
Patrick McHardyb0188d42007-07-15 00:01:25 -0700345 printk(KERN_ERR "atm_tc_delete: flow->ref == %d\n", flow->ref);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 return -EINVAL;
347 }
Patrick McHardyb0188d42007-07-15 00:01:25 -0700348 if (flow->ref > 2)
349 return -EBUSY; /* catch references via excess, etc. */
350 atm_tc_put(sch, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 return 0;
352}
353
Patrick McHardyb0188d42007-07-15 00:01:25 -0700354static void atm_tc_walk(struct Qdisc *sch, struct qdisc_walker *walker)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800356 struct atm_qdisc_data *p = qdisc_priv(sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357 struct atm_flow_data *flow;
358
Stephen Hemminger786a9032008-01-21 02:25:29 -0800359 pr_debug("atm_tc_walk(sch %p,[qdisc %p],walker %p)\n", sch, p, walker);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700360 if (walker->stop)
361 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 for (flow = p->flows; flow; flow = flow->next) {
363 if (walker->count >= walker->skip)
Patrick McHardyb0188d42007-07-15 00:01:25 -0700364 if (walker->fn(sch, (unsigned long)flow, walker) < 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 walker->stop = 1;
366 break;
367 }
368 walker->count++;
369 }
370}
371
Patrick McHardyb0188d42007-07-15 00:01:25 -0700372static struct tcf_proto **atm_tc_find_tcf(struct Qdisc *sch, unsigned long cl)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800374 struct atm_qdisc_data *p = qdisc_priv(sch);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700375 struct atm_flow_data *flow = (struct atm_flow_data *)cl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376
Stephen Hemminger786a9032008-01-21 02:25:29 -0800377 pr_debug("atm_tc_find_tcf(sch %p,[qdisc %p],flow %p)\n", sch, p, flow);
YOSHIFUJI Hideaki10297b92007-02-09 23:25:16 +0900378 return flow ? &flow->filter_list : &p->link.filter_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379}
380
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381/* --------------------------- Qdisc operations ---------------------------- */
382
Patrick McHardyb0188d42007-07-15 00:01:25 -0700383static int atm_tc_enqueue(struct sk_buff *skb, struct Qdisc *sch)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800385 struct atm_qdisc_data *p = qdisc_priv(sch);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700386 struct atm_flow_data *flow = NULL; /* @@@ */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 struct tcf_result res;
388 int result;
389 int ret = NET_XMIT_POLICED;
390
Stephen Hemminger786a9032008-01-21 02:25:29 -0800391 pr_debug("atm_tc_enqueue(skb %p,sch %p,[qdisc %p])\n", skb, sch, p);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700392 result = TC_POLICE_OK; /* be nice to gcc */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 if (TC_H_MAJ(skb->priority) != sch->handle ||
Patrick McHardyb0188d42007-07-15 00:01:25 -0700394 !(flow = (struct atm_flow_data *)atm_tc_get(sch, skb->priority)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 for (flow = p->flows; flow; flow = flow->next)
396 if (flow->filter_list) {
Patrick McHardy73ca4912007-07-15 00:02:31 -0700397 result = tc_classify_compat(skb,
398 flow->filter_list,
399 &res);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700400 if (result < 0)
401 continue;
402 flow = (struct atm_flow_data *)res.class;
403 if (!flow)
404 flow = lookup_flow(sch, res.classid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 break;
406 }
Patrick McHardyb0188d42007-07-15 00:01:25 -0700407 if (!flow)
408 flow = &p->link;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 else {
410 if (flow->vcc)
411 ATM_SKB(skb)->atm_options = flow->vcc->atm_options;
Patrick McHardyb0188d42007-07-15 00:01:25 -0700412 /*@@@ looks good ... but it's not supposed to work :-) */
Patrick McHardy92100802007-07-15 00:01:49 -0700413#ifdef CONFIG_NET_CLS_ACT
414 switch (result) {
415 case TC_ACT_QUEUED:
416 case TC_ACT_STOLEN:
417 kfree_skb(skb);
Jarek Poplawski378a2f02008-08-04 22:31:03 -0700418 return NET_XMIT_SUCCESS | __NET_XMIT_STOLEN;
Patrick McHardy92100802007-07-15 00:01:49 -0700419 case TC_ACT_SHOT:
420 kfree_skb(skb);
421 goto drop;
Patrick McHardy73ca4912007-07-15 00:02:31 -0700422 case TC_POLICE_RECLASSIFY:
423 if (flow->excess)
424 flow = flow->excess;
425 else
426 ATM_SKB(skb)->atm_options |= ATM_ATMOPT_CLP;
427 break;
Patrick McHardy92100802007-07-15 00:01:49 -0700428 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429#endif
430 }
Patrick McHardyc3bc7cf2007-07-15 00:03:05 -0700431
Jussi Kivilinna5f861732008-07-20 00:08:04 -0700432 ret = qdisc_enqueue(skb, flow->q);
Stephen Hemminger786a9032008-01-21 02:25:29 -0800433 if (ret != 0) {
Patrick McHardy92100802007-07-15 00:01:49 -0700434drop: __maybe_unused
Jarek Poplawski378a2f02008-08-04 22:31:03 -0700435 if (net_xmit_drop_count(ret)) {
436 sch->qstats.drops++;
437 if (flow)
438 flow->qstats.drops++;
439 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 return ret;
441 }
Jussi Kivilinna0abf77e2008-07-20 00:08:27 -0700442 sch->bstats.bytes += qdisc_pkt_len(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 sch->bstats.packets++;
Jussi Kivilinna0abf77e2008-07-20 00:08:27 -0700444 flow->bstats.bytes += qdisc_pkt_len(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 flow->bstats.packets++;
446 /*
447 * Okay, this may seem weird. We pretend we've dropped the packet if
448 * it goes via ATM. The reason for this is that the outer qdisc
449 * expects to be able to q->dequeue the packet later on if we return
450 * success at this place. Also, sch->q.qdisc needs to reflect whether
451 * there is a packet egligible for dequeuing or not. Note that the
452 * statistics of the outer qdisc are necessarily wrong because of all
453 * this. There's currently no correct solution for this.
454 */
455 if (flow == &p->link) {
456 sch->q.qlen++;
457 return 0;
458 }
459 tasklet_schedule(&p->task);
Jarek Poplawskic27f3392008-08-04 22:39:11 -0700460 return NET_XMIT_SUCCESS | __NET_XMIT_BYPASS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461}
462
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463/*
464 * Dequeue packets and send them over ATM. Note that we quite deliberately
465 * avoid checking net_device's flow control here, simply because sch_atm
466 * uses its own channels, which have nothing to do with any CLIP/LANE/or
467 * non-ATM interfaces.
468 */
469
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470static void sch_atm_dequeue(unsigned long data)
471{
Patrick McHardyb0188d42007-07-15 00:01:25 -0700472 struct Qdisc *sch = (struct Qdisc *)data;
Stephen Hemminger786a9032008-01-21 02:25:29 -0800473 struct atm_qdisc_data *p = qdisc_priv(sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 struct atm_flow_data *flow;
475 struct sk_buff *skb;
476
Stephen Hemminger786a9032008-01-21 02:25:29 -0800477 pr_debug("sch_atm_dequeue(sch %p,[qdisc %p])\n", sch, p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478 for (flow = p->link.next; flow; flow = flow->next)
479 /*
480 * If traffic is properly shaped, this won't generate nasty
481 * little bursts. Otherwise, it may ... (but that's okay)
482 */
483 while ((skb = flow->q->dequeue(flow->q))) {
Patrick McHardyb0188d42007-07-15 00:01:25 -0700484 if (!atm_may_send(flow->vcc, skb->truesize)) {
485 (void)flow->q->ops->requeue(skb, flow->q);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486 break;
487 }
Stephen Hemminger786a9032008-01-21 02:25:29 -0800488 pr_debug("atm_tc_dequeue: sending on class %p\n", flow);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489 /* remove any LL header somebody else has attached */
Arnaldo Carvalho de Meloeddc9ec2007-04-20 22:47:35 -0700490 skb_pull(skb, skb_network_offset(skb));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 if (skb_headroom(skb) < flow->hdr_len) {
492 struct sk_buff *new;
493
Patrick McHardyb0188d42007-07-15 00:01:25 -0700494 new = skb_realloc_headroom(skb, flow->hdr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 dev_kfree_skb(skb);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700496 if (!new)
497 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 skb = new;
499 }
Stephen Hemminger786a9032008-01-21 02:25:29 -0800500 pr_debug("sch_atm_dequeue: ip %p, data %p\n",
Arnaldo Carvalho de Meloeddc9ec2007-04-20 22:47:35 -0700501 skb_network_header(skb), skb->data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502 ATM_SKB(skb)->vcc = flow->vcc;
Patrick McHardyb0188d42007-07-15 00:01:25 -0700503 memcpy(skb_push(skb, flow->hdr_len), flow->hdr,
504 flow->hdr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505 atomic_add(skb->truesize,
506 &sk_atm(flow->vcc)->sk_wmem_alloc);
507 /* atm.atm_options are already set by atm_tc_enqueue */
Patrick McHardyb0188d42007-07-15 00:01:25 -0700508 flow->vcc->send(flow->vcc, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 }
510}
511
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512static struct sk_buff *atm_tc_dequeue(struct Qdisc *sch)
513{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800514 struct atm_qdisc_data *p = qdisc_priv(sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 struct sk_buff *skb;
516
Stephen Hemminger786a9032008-01-21 02:25:29 -0800517 pr_debug("atm_tc_dequeue(sch %p,[qdisc %p])\n", sch, p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 tasklet_schedule(&p->task);
519 skb = p->link.q->dequeue(p->link.q);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700520 if (skb)
521 sch->q.qlen--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 return skb;
523}
524
Patrick McHardyb0188d42007-07-15 00:01:25 -0700525static int atm_tc_requeue(struct sk_buff *skb, struct Qdisc *sch)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800527 struct atm_qdisc_data *p = qdisc_priv(sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528 int ret;
529
Stephen Hemminger786a9032008-01-21 02:25:29 -0800530 pr_debug("atm_tc_requeue(skb %p,sch %p,[qdisc %p])\n", skb, sch, p);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700531 ret = p->link.q->ops->requeue(skb, p->link.q);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532 if (!ret) {
Patrick McHardyb0188d42007-07-15 00:01:25 -0700533 sch->q.qlen++;
534 sch->qstats.requeues++;
Jarek Poplawski378a2f02008-08-04 22:31:03 -0700535 } else if (net_xmit_drop_count(ret)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536 sch->qstats.drops++;
537 p->link.qstats.drops++;
538 }
539 return ret;
540}
541
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542static unsigned int atm_tc_drop(struct Qdisc *sch)
543{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800544 struct atm_qdisc_data *p = qdisc_priv(sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545 struct atm_flow_data *flow;
546 unsigned int len;
547
Stephen Hemminger786a9032008-01-21 02:25:29 -0800548 pr_debug("atm_tc_drop(sch %p,[qdisc %p])\n", sch, p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549 for (flow = p->flows; flow; flow = flow->next)
550 if (flow->q->ops->drop && (len = flow->q->ops->drop(flow->q)))
551 return len;
552 return 0;
553}
554
Patrick McHardy1e904742008-01-22 22:11:17 -0800555static int atm_tc_init(struct Qdisc *sch, struct nlattr *opt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800557 struct atm_qdisc_data *p = qdisc_priv(sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558
Stephen Hemminger786a9032008-01-21 02:25:29 -0800559 pr_debug("atm_tc_init(sch %p,[qdisc %p],opt %p)\n", sch, p, opt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560 p->flows = &p->link;
David S. Miller5ce2d482008-07-08 17:06:30 -0700561 p->link.q = qdisc_create_dflt(qdisc_dev(sch), sch->dev_queue,
David S. Millerbb949fb2008-07-08 16:55:56 -0700562 &pfifo_qdisc_ops, sch->handle);
Stephen Hemminger786a9032008-01-21 02:25:29 -0800563 if (!p->link.q)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564 p->link.q = &noop_qdisc;
Stephen Hemminger786a9032008-01-21 02:25:29 -0800565 pr_debug("atm_tc_init: link (%p) qdisc %p\n", &p->link, p->link.q);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566 p->link.filter_list = NULL;
567 p->link.vcc = NULL;
568 p->link.sock = NULL;
569 p->link.classid = sch->handle;
570 p->link.ref = 1;
571 p->link.next = NULL;
Patrick McHardyb0188d42007-07-15 00:01:25 -0700572 tasklet_init(&p->task, sch_atm_dequeue, (unsigned long)sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573 return 0;
574}
575
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576static void atm_tc_reset(struct Qdisc *sch)
577{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800578 struct atm_qdisc_data *p = qdisc_priv(sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579 struct atm_flow_data *flow;
580
Stephen Hemminger786a9032008-01-21 02:25:29 -0800581 pr_debug("atm_tc_reset(sch %p,[qdisc %p])\n", sch, p);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700582 for (flow = p->flows; flow; flow = flow->next)
583 qdisc_reset(flow->q);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 sch->q.qlen = 0;
585}
586
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587static void atm_tc_destroy(struct Qdisc *sch)
588{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800589 struct atm_qdisc_data *p = qdisc_priv(sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590 struct atm_flow_data *flow;
591
Stephen Hemminger786a9032008-01-21 02:25:29 -0800592 pr_debug("atm_tc_destroy(sch %p,[qdisc %p])\n", sch, p);
Patrick McHardya4aebb82008-07-01 19:53:09 -0700593 for (flow = p->flows; flow; flow = flow->next)
594 tcf_destroy_chain(&flow->filter_list);
595
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 /* races ? */
597 while ((flow = p->flows)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 if (flow->ref > 1)
Patrick McHardyb0188d42007-07-15 00:01:25 -0700599 printk(KERN_ERR "atm_destroy: %p->ref = %d\n", flow,
600 flow->ref);
601 atm_tc_put(sch, (unsigned long)flow);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602 if (p->flows == flow) {
603 printk(KERN_ERR "atm_destroy: putting flow %p didn't "
Patrick McHardyb0188d42007-07-15 00:01:25 -0700604 "kill it\n", flow);
605 p->flows = flow->next; /* brute force */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606 break;
607 }
608 }
609 tasklet_kill(&p->task);
610}
611
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612static int atm_tc_dump_class(struct Qdisc *sch, unsigned long cl,
Patrick McHardyb0188d42007-07-15 00:01:25 -0700613 struct sk_buff *skb, struct tcmsg *tcm)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614{
Stephen Hemminger786a9032008-01-21 02:25:29 -0800615 struct atm_qdisc_data *p = qdisc_priv(sch);
Patrick McHardyb0188d42007-07-15 00:01:25 -0700616 struct atm_flow_data *flow = (struct atm_flow_data *)cl;
Patrick McHardy4b3550ef2008-01-23 20:34:11 -0800617 struct nlattr *nest;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618
Stephen Hemminger786a9032008-01-21 02:25:29 -0800619 pr_debug("atm_tc_dump_class(sch %p,[qdisc %p],flow %p,skb %p,tcm %p)\n",
Patrick McHardyb0188d42007-07-15 00:01:25 -0700620 sch, p, flow, skb, tcm);
621 if (!find_flow(p, flow))
622 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623 tcm->tcm_handle = flow->classid;
Patrick McHardycdc7f8e2006-03-20 19:01:06 -0800624 tcm->tcm_info = flow->q->handle;
Patrick McHardy4b3550ef2008-01-23 20:34:11 -0800625
626 nest = nla_nest_start(skb, TCA_OPTIONS);
627 if (nest == NULL)
628 goto nla_put_failure;
629
Patrick McHardy1e904742008-01-22 22:11:17 -0800630 NLA_PUT(skb, TCA_ATM_HDR, flow->hdr_len, flow->hdr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631 if (flow->vcc) {
632 struct sockaddr_atmpvc pvc;
633 int state;
634
635 pvc.sap_family = AF_ATMPVC;
636 pvc.sap_addr.itf = flow->vcc->dev ? flow->vcc->dev->number : -1;
637 pvc.sap_addr.vpi = flow->vcc->vpi;
638 pvc.sap_addr.vci = flow->vcc->vci;
Patrick McHardy1e904742008-01-22 22:11:17 -0800639 NLA_PUT(skb, TCA_ATM_ADDR, sizeof(pvc), &pvc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640 state = ATM_VF2VS(flow->vcc->flags);
Patrick McHardy24beeab2008-01-23 20:34:48 -0800641 NLA_PUT_U32(skb, TCA_ATM_STATE, state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642 }
643 if (flow->excess)
Patrick McHardy24beeab2008-01-23 20:34:48 -0800644 NLA_PUT_U32(skb, TCA_ATM_EXCESS, flow->classid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645 else {
Patrick McHardy24beeab2008-01-23 20:34:48 -0800646 NLA_PUT_U32(skb, TCA_ATM_EXCESS, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647 }
Patrick McHardy4b3550ef2008-01-23 20:34:11 -0800648
649 nla_nest_end(skb, nest);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650 return skb->len;
651
Patrick McHardy1e904742008-01-22 22:11:17 -0800652nla_put_failure:
Patrick McHardy4b3550ef2008-01-23 20:34:11 -0800653 nla_nest_cancel(skb, nest);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654 return -1;
655}
656static int
657atm_tc_dump_class_stats(struct Qdisc *sch, unsigned long arg,
Patrick McHardyb0188d42007-07-15 00:01:25 -0700658 struct gnet_dump *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659{
Patrick McHardyb0188d42007-07-15 00:01:25 -0700660 struct atm_flow_data *flow = (struct atm_flow_data *)arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661
662 flow->qstats.qlen = flow->q->q.qlen;
663
664 if (gnet_stats_copy_basic(d, &flow->bstats) < 0 ||
665 gnet_stats_copy_queue(d, &flow->qstats) < 0)
666 return -1;
667
668 return 0;
669}
670
671static int atm_tc_dump(struct Qdisc *sch, struct sk_buff *skb)
672{
673 return 0;
674}
675
Eric Dumazet20fea082007-11-14 01:44:41 -0800676static const struct Qdisc_class_ops atm_class_ops = {
Patrick McHardyb0188d42007-07-15 00:01:25 -0700677 .graft = atm_tc_graft,
678 .leaf = atm_tc_leaf,
679 .get = atm_tc_get,
680 .put = atm_tc_put,
681 .change = atm_tc_change,
682 .delete = atm_tc_delete,
683 .walk = atm_tc_walk,
684 .tcf_chain = atm_tc_find_tcf,
685 .bind_tcf = atm_tc_bind_filter,
686 .unbind_tcf = atm_tc_put,
687 .dump = atm_tc_dump_class,
688 .dump_stats = atm_tc_dump_class_stats,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689};
690
Eric Dumazet20fea082007-11-14 01:44:41 -0800691static struct Qdisc_ops atm_qdisc_ops __read_mostly = {
Patrick McHardyb0188d42007-07-15 00:01:25 -0700692 .cl_ops = &atm_class_ops,
693 .id = "atm",
694 .priv_size = sizeof(struct atm_qdisc_data),
695 .enqueue = atm_tc_enqueue,
696 .dequeue = atm_tc_dequeue,
697 .requeue = atm_tc_requeue,
698 .drop = atm_tc_drop,
699 .init = atm_tc_init,
700 .reset = atm_tc_reset,
701 .destroy = atm_tc_destroy,
702 .dump = atm_tc_dump,
703 .owner = THIS_MODULE,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704};
705
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706static int __init atm_init(void)
707{
708 return register_qdisc(&atm_qdisc_ops);
709}
710
YOSHIFUJI Hideaki10297b92007-02-09 23:25:16 +0900711static void __exit atm_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712{
713 unregister_qdisc(&atm_qdisc_ops);
714}
715
716module_init(atm_init)
717module_exit(atm_exit)
718MODULE_LICENSE("GPL");