Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* net/sched/sch_atm.c - ATM VC selection "queueing discipline" */ |
| 2 | |
| 3 | /* Written 1998-2000 by Werner Almesberger, EPFL ICA */ |
| 4 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | #include <linux/module.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 6 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | #include <linux/init.h> |
Alexey Dobriyan | a6b7a40 | 2011-06-06 10:43:46 +0000 | [diff] [blame] | 8 | #include <linux/interrupt.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | #include <linux/string.h> |
| 10 | #include <linux/errno.h> |
| 11 | #include <linux/skbuff.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | #include <linux/atmdev.h> |
| 13 | #include <linux/atmclip.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <linux/rtnetlink.h> |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 15 | #include <linux/file.h> /* for fput */ |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 16 | #include <net/netlink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <net/pkt_sched.h> |
Jiri Pirko | cf1facd | 2017-02-09 14:38:56 +0100 | [diff] [blame] | 18 | #include <net/pkt_cls.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | /* |
| 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #define VCC2FLOW(vcc) ((struct atm_flow_data *) ((vcc)->user_back)) |
| 42 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | struct atm_flow_data { |
Jiri Pirko | f7ebdff | 2017-08-04 14:28:56 +0200 | [diff] [blame] | 44 | struct Qdisc_class_common common; |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 45 | struct Qdisc *q; /* FIFO, TBF, etc. */ |
John Fastabend | 25d8c0d | 2014-09-12 20:05:27 -0700 | [diff] [blame] | 46 | struct tcf_proto __rcu *filter_list; |
Jiri Pirko | 6529eab | 2017-05-17 11:07:55 +0200 | [diff] [blame] | 47 | struct tcf_block *block; |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 48 | struct atm_vcc *vcc; /* VCC; NULL if VCC is closed */ |
| 49 | void (*old_pop)(struct atm_vcc *vcc, |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 50 | struct sk_buff *skb); /* chaining */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | struct atm_qdisc_data *parent; /* parent qdisc */ |
| 52 | struct socket *sock; /* for closing */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | int ref; /* reference count */ |
Eric Dumazet | c1a8f1f | 2009-08-16 09:36:49 +0000 | [diff] [blame] | 54 | struct gnet_stats_basic_packed bstats; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | struct gnet_stats_queue qstats; |
David S. Miller | 6accec7 | 2010-07-18 19:52:55 -0700 | [diff] [blame] | 56 | struct list_head list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | struct atm_flow_data *excess; /* flow for excess traffic; |
| 58 | NULL to set CLP instead */ |
| 59 | int hdr_len; |
| 60 | unsigned char hdr[0]; /* header data; MUST BE LAST */ |
| 61 | }; |
| 62 | |
| 63 | struct atm_qdisc_data { |
| 64 | struct atm_flow_data link; /* unclassified skbs go here */ |
David S. Miller | 6accec7 | 2010-07-18 19:52:55 -0700 | [diff] [blame] | 65 | struct list_head flows; /* NB: "link" is also on this |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | list */ |
Jarek Poplawski | f30ab41 | 2008-11-13 22:56:30 -0800 | [diff] [blame] | 67 | struct tasklet_struct task; /* dequeue tasklet */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | }; |
| 69 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | /* ------------------------- Class/flow operations ------------------------- */ |
| 71 | |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 72 | static inline struct atm_flow_data *lookup_flow(struct Qdisc *sch, u32 classid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | { |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 74 | struct atm_qdisc_data *p = qdisc_priv(sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | struct atm_flow_data *flow; |
| 76 | |
David S. Miller | 6accec7 | 2010-07-18 19:52:55 -0700 | [diff] [blame] | 77 | list_for_each_entry(flow, &p->flows, list) { |
Jiri Pirko | f7ebdff | 2017-08-04 14:28:56 +0200 | [diff] [blame] | 78 | if (flow->common.classid == classid) |
David S. Miller | 6accec7 | 2010-07-18 19:52:55 -0700 | [diff] [blame] | 79 | return flow; |
| 80 | } |
| 81 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | } |
| 83 | |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 84 | static int atm_tc_graft(struct Qdisc *sch, unsigned long arg, |
| 85 | struct Qdisc *new, struct Qdisc **old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | { |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 87 | struct atm_qdisc_data *p = qdisc_priv(sch); |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 88 | struct atm_flow_data *flow = (struct atm_flow_data *)arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 90 | pr_debug("atm_tc_graft(sch %p,[qdisc %p],flow %p,new %p,old %p)\n", |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 91 | sch, p, flow, new, old); |
David S. Miller | 6accec7 | 2010-07-18 19:52:55 -0700 | [diff] [blame] | 92 | if (list_empty(&flow->list)) |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 93 | return -EINVAL; |
| 94 | if (!new) |
| 95 | new = &noop_qdisc; |
Patrick McHardy | b94c8af | 2008-11-20 04:11:36 -0800 | [diff] [blame] | 96 | *old = flow->q; |
| 97 | flow->q = new; |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 98 | if (*old) |
| 99 | qdisc_reset(*old); |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 100 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | } |
| 102 | |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 103 | static struct Qdisc *atm_tc_leaf(struct Qdisc *sch, unsigned long cl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | { |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 105 | struct atm_flow_data *flow = (struct atm_flow_data *)cl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 107 | pr_debug("atm_tc_leaf(sch %p,flow %p)\n", sch, flow); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | return flow ? flow->q : NULL; |
| 109 | } |
| 110 | |
WANG Cong | 143976c | 2017-08-24 16:51:29 -0700 | [diff] [blame] | 111 | static unsigned long atm_tc_find(struct Qdisc *sch, u32 classid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | { |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 113 | struct atm_qdisc_data *p __maybe_unused = qdisc_priv(sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | struct atm_flow_data *flow; |
| 115 | |
WANG Cong | 143976c | 2017-08-24 16:51:29 -0700 | [diff] [blame] | 116 | pr_debug("%s(sch %p,[qdisc %p],classid %x)\n", __func__, sch, p, classid); |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 117 | flow = lookup_flow(sch, classid); |
WANG Cong | 143976c | 2017-08-24 16:51:29 -0700 | [diff] [blame] | 118 | pr_debug("%s: flow %p\n", __func__, flow); |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 119 | return (unsigned long)flow; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | } |
| 121 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | static unsigned long atm_tc_bind_filter(struct Qdisc *sch, |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 123 | unsigned long parent, u32 classid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | { |
WANG Cong | 143976c | 2017-08-24 16:51:29 -0700 | [diff] [blame] | 125 | struct atm_qdisc_data *p __maybe_unused = qdisc_priv(sch); |
| 126 | struct atm_flow_data *flow; |
| 127 | |
| 128 | pr_debug("%s(sch %p,[qdisc %p],classid %x)\n", __func__, sch, p, classid); |
| 129 | flow = lookup_flow(sch, classid); |
| 130 | if (flow) |
| 131 | flow->ref++; |
| 132 | pr_debug("%s: flow %p\n", __func__, flow); |
| 133 | return (unsigned long)flow; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | } |
| 135 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | /* |
| 137 | * atm_tc_put handles all destructions, including the ones that are explicitly |
| 138 | * requested (atm_tc_destroy, etc.). The assumption here is that we never drop |
| 139 | * anything that still seems to be in use. |
| 140 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | static void atm_tc_put(struct Qdisc *sch, unsigned long cl) |
| 142 | { |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 143 | struct atm_qdisc_data *p = qdisc_priv(sch); |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 144 | struct atm_flow_data *flow = (struct atm_flow_data *)cl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 146 | pr_debug("atm_tc_put(sch %p,[qdisc %p],flow %p)\n", sch, p, flow); |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 147 | if (--flow->ref) |
| 148 | return; |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 149 | pr_debug("atm_tc_put: destroying\n"); |
David S. Miller | 6accec7 | 2010-07-18 19:52:55 -0700 | [diff] [blame] | 150 | list_del_init(&flow->list); |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 151 | pr_debug("atm_tc_put: qdisc %p\n", flow->q); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | qdisc_destroy(flow->q); |
Jiri Pirko | 6529eab | 2017-05-17 11:07:55 +0200 | [diff] [blame] | 153 | tcf_block_put(flow->block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | if (flow->sock) { |
Al Viro | 516e0cc | 2008-07-26 00:39:17 -0400 | [diff] [blame] | 155 | pr_debug("atm_tc_put: f_count %ld\n", |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 156 | file_count(flow->sock->file)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | flow->vcc->pop = flow->old_pop; |
| 158 | sockfd_put(flow->sock); |
| 159 | } |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 160 | if (flow->excess) |
| 161 | atm_tc_put(sch, (unsigned long)flow->excess); |
| 162 | if (flow != &p->link) |
| 163 | kfree(flow); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | /* |
| 165 | * If flow == &p->link, the qdisc no longer works at this point and |
| 166 | * needs to be removed. (By the caller of atm_tc_put.) |
| 167 | */ |
| 168 | } |
| 169 | |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 170 | static void sch_atm_pop(struct atm_vcc *vcc, struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | { |
| 172 | struct atm_qdisc_data *p = VCC2FLOW(vcc)->parent; |
| 173 | |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 174 | pr_debug("sch_atm_pop(vcc %p,skb %p,[qdisc %p])\n", vcc, skb, p); |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 175 | VCC2FLOW(vcc)->old_pop(vcc, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | tasklet_schedule(&p->task); |
| 177 | } |
| 178 | |
| 179 | static const u8 llc_oui_ip[] = { |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 180 | 0xaa, /* DSAP: non-ISO */ |
| 181 | 0xaa, /* SSAP: non-ISO */ |
| 182 | 0x03, /* Ctrl: Unnumbered Information Command PDU */ |
| 183 | 0x00, /* OUI: EtherType */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | 0x00, 0x00, |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 185 | 0x08, 0x00 |
| 186 | }; /* Ethertype IP (0800) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | |
Patrick McHardy | 27a3421 | 2008-01-23 20:35:39 -0800 | [diff] [blame] | 188 | static const struct nla_policy atm_policy[TCA_ATM_MAX + 1] = { |
| 189 | [TCA_ATM_FD] = { .type = NLA_U32 }, |
| 190 | [TCA_ATM_EXCESS] = { .type = NLA_U32 }, |
| 191 | }; |
| 192 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | static int atm_tc_change(struct Qdisc *sch, u32 classid, u32 parent, |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 194 | struct nlattr **tca, unsigned long *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | { |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 196 | struct atm_qdisc_data *p = qdisc_priv(sch); |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 197 | struct atm_flow_data *flow = (struct atm_flow_data *)*arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | struct atm_flow_data *excess = NULL; |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 199 | struct nlattr *opt = tca[TCA_OPTIONS]; |
| 200 | struct nlattr *tb[TCA_ATM_MAX + 1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | struct socket *sock; |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 202 | int fd, error, hdr_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | void *hdr; |
| 204 | |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 205 | pr_debug("atm_tc_change(sch %p,[qdisc %p],classid %x,parent %x," |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 206 | "flow %p,opt %p)\n", sch, p, classid, parent, flow, opt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | /* |
| 208 | * The concept of parents doesn't apply for this qdisc. |
| 209 | */ |
| 210 | if (parent && parent != TC_H_ROOT && parent != sch->handle) |
| 211 | return -EINVAL; |
| 212 | /* |
| 213 | * ATM classes cannot be changed. In order to change properties of the |
| 214 | * ATM connection, that socket needs to be modified directly (via the |
| 215 | * native ATM API. In order to send a flow to a different VC, the old |
| 216 | * class needs to be removed and a new one added. (This may be changed |
| 217 | * later.) |
| 218 | */ |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 219 | if (flow) |
| 220 | return -EBUSY; |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 221 | if (opt == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | return -EINVAL; |
Patrick McHardy | 27a3421 | 2008-01-23 20:35:39 -0800 | [diff] [blame] | 223 | |
Johannes Berg | fceb643 | 2017-04-12 14:34:07 +0200 | [diff] [blame] | 224 | error = nla_parse_nested(tb, TCA_ATM_MAX, opt, atm_policy, NULL); |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 225 | if (error < 0) |
| 226 | return error; |
| 227 | |
Patrick McHardy | 27a3421 | 2008-01-23 20:35:39 -0800 | [diff] [blame] | 228 | if (!tb[TCA_ATM_FD]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | return -EINVAL; |
Patrick McHardy | 1587bac | 2008-01-23 20:35:03 -0800 | [diff] [blame] | 230 | fd = nla_get_u32(tb[TCA_ATM_FD]); |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 231 | pr_debug("atm_tc_change: fd %d\n", fd); |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 232 | if (tb[TCA_ATM_HDR]) { |
| 233 | hdr_len = nla_len(tb[TCA_ATM_HDR]); |
| 234 | hdr = nla_data(tb[TCA_ATM_HDR]); |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 235 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | hdr_len = RFC1483LLC_LEN; |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 237 | hdr = NULL; /* default LLC/SNAP for IP */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | } |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 239 | if (!tb[TCA_ATM_EXCESS]) |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 240 | excess = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | else { |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 242 | excess = (struct atm_flow_data *) |
WANG Cong | 143976c | 2017-08-24 16:51:29 -0700 | [diff] [blame] | 243 | atm_tc_find(sch, nla_get_u32(tb[TCA_ATM_EXCESS])); |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 244 | if (!excess) |
| 245 | return -ENOENT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | } |
Patrick McHardy | f5e5cb7 | 2008-01-23 20:32:06 -0800 | [diff] [blame] | 247 | pr_debug("atm_tc_change: type %d, payload %d, hdr_len %d\n", |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 248 | opt->nla_type, nla_len(opt), hdr_len); |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 249 | sock = sockfd_lookup(fd, &error); |
| 250 | if (!sock) |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 251 | return error; /* f_count++ */ |
Al Viro | 516e0cc | 2008-07-26 00:39:17 -0400 | [diff] [blame] | 252 | pr_debug("atm_tc_change: f_count %ld\n", file_count(sock->file)); |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 253 | if (sock->ops->family != PF_ATMSVC && sock->ops->family != PF_ATMPVC) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | error = -EPROTOTYPE; |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 255 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | } |
| 257 | /* @@@ should check if the socket is really operational or we'll crash |
| 258 | on vcc->send */ |
| 259 | if (classid) { |
| 260 | if (TC_H_MAJ(classid ^ sch->handle)) { |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 261 | pr_debug("atm_tc_change: classid mismatch\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | error = -EINVAL; |
| 263 | goto err_out; |
| 264 | } |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 265 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | int i; |
| 267 | unsigned long cl; |
| 268 | |
| 269 | for (i = 1; i < 0x8000; i++) { |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 270 | classid = TC_H_MAKE(sch->handle, 0x8000 | i); |
WANG Cong | 143976c | 2017-08-24 16:51:29 -0700 | [diff] [blame] | 271 | cl = atm_tc_find(sch, classid); |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 272 | if (!cl) |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 273 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | } |
| 275 | } |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 276 | pr_debug("atm_tc_change: new id %x\n", classid); |
vignesh babu | 782f795 | 2007-07-16 18:30:36 -0700 | [diff] [blame] | 277 | flow = kzalloc(sizeof(struct atm_flow_data) + hdr_len, GFP_KERNEL); |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 278 | pr_debug("atm_tc_change: flow %p\n", flow); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | if (!flow) { |
| 280 | error = -ENOBUFS; |
| 281 | goto err_out; |
| 282 | } |
Jiri Pirko | 6529eab | 2017-05-17 11:07:55 +0200 | [diff] [blame] | 283 | |
| 284 | error = tcf_block_get(&flow->block, &flow->filter_list); |
| 285 | if (error) { |
| 286 | kfree(flow); |
| 287 | goto err_out; |
| 288 | } |
| 289 | |
Changli Gao | 3511c91 | 2010-10-16 13:04:08 +0000 | [diff] [blame] | 290 | flow->q = qdisc_create_dflt(sch->dev_queue, &pfifo_qdisc_ops, classid); |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 291 | if (!flow->q) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | flow->q = &noop_qdisc; |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 293 | pr_debug("atm_tc_change: qdisc %p\n", flow->q); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | flow->sock = sock; |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 295 | flow->vcc = ATM_SD(sock); /* speedup */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | flow->vcc->user_back = flow; |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 297 | pr_debug("atm_tc_change: vcc %p\n", flow->vcc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | flow->old_pop = flow->vcc->pop; |
| 299 | flow->parent = p; |
| 300 | flow->vcc->pop = sch_atm_pop; |
Jiri Pirko | f7ebdff | 2017-08-04 14:28:56 +0200 | [diff] [blame] | 301 | flow->common.classid = classid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | flow->ref = 1; |
| 303 | flow->excess = excess; |
David S. Miller | 6accec7 | 2010-07-18 19:52:55 -0700 | [diff] [blame] | 304 | list_add(&flow->list, &p->link.list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | flow->hdr_len = hdr_len; |
| 306 | if (hdr) |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 307 | memcpy(flow->hdr, hdr, hdr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | else |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 309 | memcpy(flow->hdr, llc_oui_ip, sizeof(llc_oui_ip)); |
| 310 | *arg = (unsigned long)flow; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | return 0; |
| 312 | err_out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | sockfd_put(sock); |
| 314 | return error; |
| 315 | } |
| 316 | |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 317 | static int atm_tc_delete(struct Qdisc *sch, unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | { |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 319 | struct atm_qdisc_data *p = qdisc_priv(sch); |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 320 | struct atm_flow_data *flow = (struct atm_flow_data *)arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 322 | pr_debug("atm_tc_delete(sch %p,[qdisc %p],flow %p)\n", sch, p, flow); |
David S. Miller | 6accec7 | 2010-07-18 19:52:55 -0700 | [diff] [blame] | 323 | if (list_empty(&flow->list)) |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 324 | return -EINVAL; |
John Fastabend | 25d8c0d | 2014-09-12 20:05:27 -0700 | [diff] [blame] | 325 | if (rcu_access_pointer(flow->filter_list) || flow == &p->link) |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 326 | return -EBUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | /* |
| 328 | * Reference count must be 2: one for "keepalive" (set at class |
| 329 | * creation), and one for the reference held when calling delete. |
| 330 | */ |
| 331 | if (flow->ref < 2) { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 332 | pr_err("atm_tc_delete: flow->ref == %d\n", flow->ref); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | return -EINVAL; |
| 334 | } |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 335 | if (flow->ref > 2) |
| 336 | return -EBUSY; /* catch references via excess, etc. */ |
| 337 | atm_tc_put(sch, arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | return 0; |
| 339 | } |
| 340 | |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 341 | static void atm_tc_walk(struct Qdisc *sch, struct qdisc_walker *walker) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | { |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 343 | struct atm_qdisc_data *p = qdisc_priv(sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | struct atm_flow_data *flow; |
| 345 | |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 346 | pr_debug("atm_tc_walk(sch %p,[qdisc %p],walker %p)\n", sch, p, walker); |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 347 | if (walker->stop) |
| 348 | return; |
David S. Miller | 6accec7 | 2010-07-18 19:52:55 -0700 | [diff] [blame] | 349 | list_for_each_entry(flow, &p->flows, list) { |
| 350 | if (walker->count >= walker->skip && |
| 351 | walker->fn(sch, (unsigned long)flow, walker) < 0) { |
| 352 | walker->stop = 1; |
| 353 | break; |
| 354 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | walker->count++; |
| 356 | } |
| 357 | } |
| 358 | |
Jiri Pirko | 6529eab | 2017-05-17 11:07:55 +0200 | [diff] [blame] | 359 | static struct tcf_block *atm_tc_tcf_block(struct Qdisc *sch, unsigned long cl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | { |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 361 | struct atm_qdisc_data *p = qdisc_priv(sch); |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 362 | struct atm_flow_data *flow = (struct atm_flow_data *)cl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 364 | pr_debug("atm_tc_find_tcf(sch %p,[qdisc %p],flow %p)\n", sch, p, flow); |
Jiri Pirko | 6529eab | 2017-05-17 11:07:55 +0200 | [diff] [blame] | 365 | return flow ? flow->block : p->link.block; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | } |
| 367 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | /* --------------------------- Qdisc operations ---------------------------- */ |
| 369 | |
Eric Dumazet | 520ac30 | 2016-06-21 23:16:49 -0700 | [diff] [blame] | 370 | static int atm_tc_enqueue(struct sk_buff *skb, struct Qdisc *sch, |
| 371 | struct sk_buff **to_free) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | { |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 373 | struct atm_qdisc_data *p = qdisc_priv(sch); |
David S. Miller | 6accec7 | 2010-07-18 19:52:55 -0700 | [diff] [blame] | 374 | struct atm_flow_data *flow; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | struct tcf_result res; |
| 376 | int result; |
Florian Westphal | 9986020 | 2016-06-11 12:46:04 +0200 | [diff] [blame] | 377 | int ret = NET_XMIT_SUCCESS | __NET_XMIT_BYPASS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 379 | pr_debug("atm_tc_enqueue(skb %p,sch %p,[qdisc %p])\n", skb, sch, p); |
WANG Cong | 95df1b1 | 2016-06-13 10:47:43 -0700 | [diff] [blame] | 380 | result = TC_ACT_OK; /* be nice to gcc */ |
David S. Miller | 6accec7 | 2010-07-18 19:52:55 -0700 | [diff] [blame] | 381 | flow = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | if (TC_H_MAJ(skb->priority) != sch->handle || |
WANG Cong | 143976c | 2017-08-24 16:51:29 -0700 | [diff] [blame] | 383 | !(flow = (struct atm_flow_data *)atm_tc_find(sch, skb->priority))) { |
John Fastabend | 25d8c0d | 2014-09-12 20:05:27 -0700 | [diff] [blame] | 384 | struct tcf_proto *fl; |
| 385 | |
David S. Miller | 6accec7 | 2010-07-18 19:52:55 -0700 | [diff] [blame] | 386 | list_for_each_entry(flow, &p->flows, list) { |
John Fastabend | 25d8c0d | 2014-09-12 20:05:27 -0700 | [diff] [blame] | 387 | fl = rcu_dereference_bh(flow->filter_list); |
| 388 | if (fl) { |
Jiri Pirko | 87d8309 | 2017-05-17 11:07:54 +0200 | [diff] [blame] | 389 | result = tcf_classify(skb, fl, &res, true); |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 390 | if (result < 0) |
| 391 | continue; |
| 392 | flow = (struct atm_flow_data *)res.class; |
| 393 | if (!flow) |
| 394 | flow = lookup_flow(sch, res.classid); |
David S. Miller | 6accec7 | 2010-07-18 19:52:55 -0700 | [diff] [blame] | 395 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | } |
David S. Miller | 6accec7 | 2010-07-18 19:52:55 -0700 | [diff] [blame] | 397 | } |
| 398 | flow = NULL; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 399 | done: |
| 400 | ; |
David S. Miller | 6accec7 | 2010-07-18 19:52:55 -0700 | [diff] [blame] | 401 | } |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 402 | if (!flow) { |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 403 | flow = &p->link; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 404 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | if (flow->vcc) |
| 406 | ATM_SKB(skb)->atm_options = flow->vcc->atm_options; |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 407 | /*@@@ looks good ... but it's not supposed to work :-) */ |
Patrick McHardy | 9210080 | 2007-07-15 00:01:49 -0700 | [diff] [blame] | 408 | #ifdef CONFIG_NET_CLS_ACT |
| 409 | switch (result) { |
| 410 | case TC_ACT_QUEUED: |
| 411 | case TC_ACT_STOLEN: |
Jiri Pirko | e25ea21 | 2017-06-06 14:12:02 +0200 | [diff] [blame] | 412 | case TC_ACT_TRAP: |
Eric Dumazet | 520ac30 | 2016-06-21 23:16:49 -0700 | [diff] [blame] | 413 | __qdisc_drop(skb, to_free); |
Jarek Poplawski | 378a2f0 | 2008-08-04 22:31:03 -0700 | [diff] [blame] | 414 | return NET_XMIT_SUCCESS | __NET_XMIT_STOLEN; |
Patrick McHardy | 9210080 | 2007-07-15 00:01:49 -0700 | [diff] [blame] | 415 | case TC_ACT_SHOT: |
Eric Dumazet | 520ac30 | 2016-06-21 23:16:49 -0700 | [diff] [blame] | 416 | __qdisc_drop(skb, to_free); |
Patrick McHardy | 9210080 | 2007-07-15 00:01:49 -0700 | [diff] [blame] | 417 | goto drop; |
WANG Cong | 95df1b1 | 2016-06-13 10:47:43 -0700 | [diff] [blame] | 418 | case TC_ACT_RECLASSIFY: |
Patrick McHardy | 73ca491 | 2007-07-15 00:02:31 -0700 | [diff] [blame] | 419 | if (flow->excess) |
| 420 | flow = flow->excess; |
| 421 | else |
| 422 | ATM_SKB(skb)->atm_options |= ATM_ATMOPT_CLP; |
| 423 | break; |
Patrick McHardy | 9210080 | 2007-07-15 00:01:49 -0700 | [diff] [blame] | 424 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | #endif |
| 426 | } |
Patrick McHardy | c3bc7cf | 2007-07-15 00:03:05 -0700 | [diff] [blame] | 427 | |
Eric Dumazet | 520ac30 | 2016-06-21 23:16:49 -0700 | [diff] [blame] | 428 | ret = qdisc_enqueue(skb, flow->q, to_free); |
Ben Greear | 9871e50 | 2010-08-10 01:45:40 -0700 | [diff] [blame] | 429 | if (ret != NET_XMIT_SUCCESS) { |
Patrick McHardy | 9210080 | 2007-07-15 00:01:49 -0700 | [diff] [blame] | 430 | drop: __maybe_unused |
Jarek Poplawski | 378a2f0 | 2008-08-04 22:31:03 -0700 | [diff] [blame] | 431 | if (net_xmit_drop_count(ret)) { |
John Fastabend | 25331d6 | 2014-09-28 11:53:29 -0700 | [diff] [blame] | 432 | qdisc_qstats_drop(sch); |
Jarek Poplawski | 378a2f0 | 2008-08-04 22:31:03 -0700 | [diff] [blame] | 433 | if (flow) |
| 434 | flow->qstats.drops++; |
| 435 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | return ret; |
| 437 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | /* |
| 439 | * Okay, this may seem weird. We pretend we've dropped the packet if |
| 440 | * it goes via ATM. The reason for this is that the outer qdisc |
| 441 | * expects to be able to q->dequeue the packet later on if we return |
| 442 | * success at this place. Also, sch->q.qdisc needs to reflect whether |
| 443 | * there is a packet egligible for dequeuing or not. Note that the |
| 444 | * statistics of the outer qdisc are necessarily wrong because of all |
| 445 | * this. There's currently no correct solution for this. |
| 446 | */ |
| 447 | if (flow == &p->link) { |
| 448 | sch->q.qlen++; |
Ben Greear | 9871e50 | 2010-08-10 01:45:40 -0700 | [diff] [blame] | 449 | return NET_XMIT_SUCCESS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | } |
| 451 | tasklet_schedule(&p->task); |
Jarek Poplawski | c27f339 | 2008-08-04 22:39:11 -0700 | [diff] [blame] | 452 | return NET_XMIT_SUCCESS | __NET_XMIT_BYPASS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | } |
| 454 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | /* |
| 456 | * Dequeue packets and send them over ATM. Note that we quite deliberately |
| 457 | * avoid checking net_device's flow control here, simply because sch_atm |
| 458 | * uses its own channels, which have nothing to do with any CLIP/LANE/or |
| 459 | * non-ATM interfaces. |
| 460 | */ |
| 461 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | static void sch_atm_dequeue(unsigned long data) |
| 463 | { |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 464 | struct Qdisc *sch = (struct Qdisc *)data; |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 465 | struct atm_qdisc_data *p = qdisc_priv(sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | struct atm_flow_data *flow; |
| 467 | struct sk_buff *skb; |
| 468 | |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 469 | pr_debug("sch_atm_dequeue(sch %p,[qdisc %p])\n", sch, p); |
David S. Miller | 6accec7 | 2010-07-18 19:52:55 -0700 | [diff] [blame] | 470 | list_for_each_entry(flow, &p->flows, list) { |
| 471 | if (flow == &p->link) |
| 472 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | /* |
| 474 | * If traffic is properly shaped, this won't generate nasty |
| 475 | * little bursts. Otherwise, it may ... (but that's okay) |
| 476 | */ |
Jarek Poplawski | 03c05f0 | 2008-10-31 00:46:19 -0700 | [diff] [blame] | 477 | while ((skb = flow->q->ops->peek(flow->q))) { |
| 478 | if (!atm_may_send(flow->vcc, skb->truesize)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | break; |
Jarek Poplawski | 03c05f0 | 2008-10-31 00:46:19 -0700 | [diff] [blame] | 480 | |
Jarek Poplawski | 77be155 | 2008-10-31 00:47:01 -0700 | [diff] [blame] | 481 | skb = qdisc_dequeue_peeked(flow->q); |
Jarek Poplawski | 03c05f0 | 2008-10-31 00:46:19 -0700 | [diff] [blame] | 482 | if (unlikely(!skb)) |
| 483 | break; |
| 484 | |
Eric Dumazet | 2dd875f | 2012-05-10 05:36:34 +0000 | [diff] [blame] | 485 | qdisc_bstats_update(sch, skb); |
| 486 | bstats_update(&flow->bstats, skb); |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 487 | pr_debug("atm_tc_dequeue: sending on class %p\n", flow); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | /* remove any LL header somebody else has attached */ |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 489 | skb_pull(skb, skb_network_offset(skb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | if (skb_headroom(skb) < flow->hdr_len) { |
| 491 | struct sk_buff *new; |
| 492 | |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 493 | new = skb_realloc_headroom(skb, flow->hdr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | dev_kfree_skb(skb); |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 495 | if (!new) |
| 496 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | skb = new; |
| 498 | } |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 499 | pr_debug("sch_atm_dequeue: ip %p, data %p\n", |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 500 | skb_network_header(skb), skb->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | ATM_SKB(skb)->vcc = flow->vcc; |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 502 | memcpy(skb_push(skb, flow->hdr_len), flow->hdr, |
| 503 | flow->hdr_len); |
Reshetova, Elena | 14afee4 | 2017-06-30 13:08:00 +0300 | [diff] [blame] | 504 | refcount_add(skb->truesize, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | &sk_atm(flow->vcc)->sk_wmem_alloc); |
| 506 | /* atm.atm_options are already set by atm_tc_enqueue */ |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 507 | flow->vcc->send(flow->vcc, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | } |
David S. Miller | 6accec7 | 2010-07-18 19:52:55 -0700 | [diff] [blame] | 509 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | } |
| 511 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | static struct sk_buff *atm_tc_dequeue(struct Qdisc *sch) |
| 513 | { |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 514 | struct atm_qdisc_data *p = qdisc_priv(sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | struct sk_buff *skb; |
| 516 | |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 517 | pr_debug("atm_tc_dequeue(sch %p,[qdisc %p])\n", sch, p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | tasklet_schedule(&p->task); |
Jarek Poplawski | 77be155 | 2008-10-31 00:47:01 -0700 | [diff] [blame] | 519 | skb = qdisc_dequeue_peeked(p->link.q); |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 520 | if (skb) |
| 521 | sch->q.qlen--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | return skb; |
| 523 | } |
| 524 | |
Jarek Poplawski | 8e3af97 | 2008-10-31 00:45:55 -0700 | [diff] [blame] | 525 | static struct sk_buff *atm_tc_peek(struct Qdisc *sch) |
| 526 | { |
| 527 | struct atm_qdisc_data *p = qdisc_priv(sch); |
| 528 | |
| 529 | pr_debug("atm_tc_peek(sch %p,[qdisc %p])\n", sch, p); |
| 530 | |
| 531 | return p->link.q->ops->peek(p->link.q); |
| 532 | } |
| 533 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 534 | static int atm_tc_init(struct Qdisc *sch, struct nlattr *opt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | { |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 536 | struct atm_qdisc_data *p = qdisc_priv(sch); |
Jiri Pirko | 6529eab | 2017-05-17 11:07:55 +0200 | [diff] [blame] | 537 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 539 | pr_debug("atm_tc_init(sch %p,[qdisc %p],opt %p)\n", sch, p, opt); |
David S. Miller | 6accec7 | 2010-07-18 19:52:55 -0700 | [diff] [blame] | 540 | INIT_LIST_HEAD(&p->flows); |
| 541 | INIT_LIST_HEAD(&p->link.list); |
| 542 | list_add(&p->link.list, &p->flows); |
Changli Gao | 3511c91 | 2010-10-16 13:04:08 +0000 | [diff] [blame] | 543 | p->link.q = qdisc_create_dflt(sch->dev_queue, |
David S. Miller | bb949fb | 2008-07-08 16:55:56 -0700 | [diff] [blame] | 544 | &pfifo_qdisc_ops, sch->handle); |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 545 | if (!p->link.q) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | p->link.q = &noop_qdisc; |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 547 | pr_debug("atm_tc_init: link (%p) qdisc %p\n", &p->link, p->link.q); |
Jiri Pirko | 6529eab | 2017-05-17 11:07:55 +0200 | [diff] [blame] | 548 | |
| 549 | err = tcf_block_get(&p->link.block, &p->link.filter_list); |
| 550 | if (err) |
| 551 | return err; |
| 552 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | p->link.vcc = NULL; |
| 554 | p->link.sock = NULL; |
Jiri Pirko | f7ebdff | 2017-08-04 14:28:56 +0200 | [diff] [blame] | 555 | p->link.common.classid = sch->handle; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | p->link.ref = 1; |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 557 | tasklet_init(&p->task, sch_atm_dequeue, (unsigned long)sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | return 0; |
| 559 | } |
| 560 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | static void atm_tc_reset(struct Qdisc *sch) |
| 562 | { |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 563 | struct atm_qdisc_data *p = qdisc_priv(sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | struct atm_flow_data *flow; |
| 565 | |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 566 | pr_debug("atm_tc_reset(sch %p,[qdisc %p])\n", sch, p); |
David S. Miller | 6accec7 | 2010-07-18 19:52:55 -0700 | [diff] [blame] | 567 | list_for_each_entry(flow, &p->flows, list) |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 568 | qdisc_reset(flow->q); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | sch->q.qlen = 0; |
| 570 | } |
| 571 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | static void atm_tc_destroy(struct Qdisc *sch) |
| 573 | { |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 574 | struct atm_qdisc_data *p = qdisc_priv(sch); |
David S. Miller | 6accec7 | 2010-07-18 19:52:55 -0700 | [diff] [blame] | 575 | struct atm_flow_data *flow, *tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 577 | pr_debug("atm_tc_destroy(sch %p,[qdisc %p])\n", sch, p); |
Konstantin Khlebnikov | 8989042 | 2017-08-15 16:35:21 +0300 | [diff] [blame] | 578 | list_for_each_entry(flow, &p->flows, list) { |
Jiri Pirko | 6529eab | 2017-05-17 11:07:55 +0200 | [diff] [blame] | 579 | tcf_block_put(flow->block); |
Konstantin Khlebnikov | 8989042 | 2017-08-15 16:35:21 +0300 | [diff] [blame] | 580 | flow->block = NULL; |
| 581 | } |
Patrick McHardy | a4aebb8 | 2008-07-01 19:53:09 -0700 | [diff] [blame] | 582 | |
David S. Miller | 6accec7 | 2010-07-18 19:52:55 -0700 | [diff] [blame] | 583 | list_for_each_entry_safe(flow, tmp, &p->flows, list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | if (flow->ref > 1) |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 585 | pr_err("atm_destroy: %p->ref = %d\n", flow, flow->ref); |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 586 | atm_tc_put(sch, (unsigned long)flow); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | } |
| 588 | tasklet_kill(&p->task); |
| 589 | } |
| 590 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | static int atm_tc_dump_class(struct Qdisc *sch, unsigned long cl, |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 592 | struct sk_buff *skb, struct tcmsg *tcm) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | { |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 594 | struct atm_qdisc_data *p = qdisc_priv(sch); |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 595 | struct atm_flow_data *flow = (struct atm_flow_data *)cl; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 596 | struct nlattr *nest; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 598 | pr_debug("atm_tc_dump_class(sch %p,[qdisc %p],flow %p,skb %p,tcm %p)\n", |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 599 | sch, p, flow, skb, tcm); |
David S. Miller | 6accec7 | 2010-07-18 19:52:55 -0700 | [diff] [blame] | 600 | if (list_empty(&flow->list)) |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 601 | return -EINVAL; |
Jiri Pirko | f7ebdff | 2017-08-04 14:28:56 +0200 | [diff] [blame] | 602 | tcm->tcm_handle = flow->common.classid; |
Patrick McHardy | cdc7f8e | 2006-03-20 19:01:06 -0800 | [diff] [blame] | 603 | tcm->tcm_info = flow->q->handle; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 604 | |
| 605 | nest = nla_nest_start(skb, TCA_OPTIONS); |
| 606 | if (nest == NULL) |
| 607 | goto nla_put_failure; |
| 608 | |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 609 | if (nla_put(skb, TCA_ATM_HDR, flow->hdr_len, flow->hdr)) |
| 610 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | if (flow->vcc) { |
| 612 | struct sockaddr_atmpvc pvc; |
| 613 | int state; |
| 614 | |
Dan Carpenter | 8cb3b9c | 2013-07-30 13:23:39 +0300 | [diff] [blame] | 615 | memset(&pvc, 0, sizeof(pvc)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | pvc.sap_family = AF_ATMPVC; |
| 617 | pvc.sap_addr.itf = flow->vcc->dev ? flow->vcc->dev->number : -1; |
| 618 | pvc.sap_addr.vpi = flow->vcc->vpi; |
| 619 | pvc.sap_addr.vci = flow->vcc->vci; |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 620 | if (nla_put(skb, TCA_ATM_ADDR, sizeof(pvc), &pvc)) |
| 621 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | state = ATM_VF2VS(flow->vcc->flags); |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 623 | if (nla_put_u32(skb, TCA_ATM_STATE, state)) |
| 624 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | } |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 626 | if (flow->excess) { |
Jiri Pirko | f7ebdff | 2017-08-04 14:28:56 +0200 | [diff] [blame] | 627 | if (nla_put_u32(skb, TCA_ATM_EXCESS, flow->common.classid)) |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 628 | goto nla_put_failure; |
| 629 | } else { |
| 630 | if (nla_put_u32(skb, TCA_ATM_EXCESS, 0)) |
| 631 | goto nla_put_failure; |
| 632 | } |
Yang Yingliang | d59b7d8 | 2014-03-12 10:20:32 +0800 | [diff] [blame] | 633 | return nla_nest_end(skb, nest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 635 | nla_put_failure: |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 636 | nla_nest_cancel(skb, nest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | return -1; |
| 638 | } |
| 639 | static int |
| 640 | atm_tc_dump_class_stats(struct Qdisc *sch, unsigned long arg, |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 641 | struct gnet_dump *d) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | { |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 643 | struct atm_flow_data *flow = (struct atm_flow_data *)arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | |
Eric Dumazet | edb09eb | 2016-06-06 09:37:16 -0700 | [diff] [blame] | 645 | if (gnet_stats_copy_basic(qdisc_root_sleeping_running(sch), |
| 646 | d, NULL, &flow->bstats) < 0 || |
John Fastabend | b0ab6f9 | 2014-09-28 11:54:24 -0700 | [diff] [blame] | 647 | gnet_stats_copy_queue(d, NULL, &flow->qstats, flow->q->q.qlen) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | return -1; |
| 649 | |
| 650 | return 0; |
| 651 | } |
| 652 | |
| 653 | static int atm_tc_dump(struct Qdisc *sch, struct sk_buff *skb) |
| 654 | { |
| 655 | return 0; |
| 656 | } |
| 657 | |
Eric Dumazet | 20fea08 | 2007-11-14 01:44:41 -0800 | [diff] [blame] | 658 | static const struct Qdisc_class_ops atm_class_ops = { |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 659 | .graft = atm_tc_graft, |
| 660 | .leaf = atm_tc_leaf, |
WANG Cong | 143976c | 2017-08-24 16:51:29 -0700 | [diff] [blame] | 661 | .find = atm_tc_find, |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 662 | .change = atm_tc_change, |
| 663 | .delete = atm_tc_delete, |
| 664 | .walk = atm_tc_walk, |
Jiri Pirko | 6529eab | 2017-05-17 11:07:55 +0200 | [diff] [blame] | 665 | .tcf_block = atm_tc_tcf_block, |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 666 | .bind_tcf = atm_tc_bind_filter, |
| 667 | .unbind_tcf = atm_tc_put, |
| 668 | .dump = atm_tc_dump_class, |
| 669 | .dump_stats = atm_tc_dump_class_stats, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | }; |
| 671 | |
Eric Dumazet | 20fea08 | 2007-11-14 01:44:41 -0800 | [diff] [blame] | 672 | static struct Qdisc_ops atm_qdisc_ops __read_mostly = { |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 673 | .cl_ops = &atm_class_ops, |
| 674 | .id = "atm", |
| 675 | .priv_size = sizeof(struct atm_qdisc_data), |
| 676 | .enqueue = atm_tc_enqueue, |
| 677 | .dequeue = atm_tc_dequeue, |
Jarek Poplawski | 8e3af97 | 2008-10-31 00:45:55 -0700 | [diff] [blame] | 678 | .peek = atm_tc_peek, |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 679 | .init = atm_tc_init, |
| 680 | .reset = atm_tc_reset, |
| 681 | .destroy = atm_tc_destroy, |
| 682 | .dump = atm_tc_dump, |
| 683 | .owner = THIS_MODULE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | }; |
| 685 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | static int __init atm_init(void) |
| 687 | { |
| 688 | return register_qdisc(&atm_qdisc_ops); |
| 689 | } |
| 690 | |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 691 | static void __exit atm_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | { |
| 693 | unregister_qdisc(&atm_qdisc_ops); |
| 694 | } |
| 695 | |
| 696 | module_init(atm_init) |
| 697 | module_exit(atm_exit) |
| 698 | MODULE_LICENSE("GPL"); |