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> |
| 8 | #include <linux/string.h> |
| 9 | #include <linux/errno.h> |
| 10 | #include <linux/skbuff.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | #include <linux/atmdev.h> |
| 12 | #include <linux/atmclip.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <linux/rtnetlink.h> |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 14 | #include <linux/file.h> /* for fput */ |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 15 | #include <net/netlink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | #include <net/pkt_sched.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 18 | extern struct socket *sockfd_lookup(int fd, int *err); /* @@@ fix this */ |
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 { |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 44 | struct Qdisc *q; /* FIFO, TBF, etc. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | struct tcf_proto *filter_list; |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 46 | struct atm_vcc *vcc; /* VCC; NULL if VCC is closed */ |
| 47 | void (*old_pop)(struct atm_vcc *vcc, |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 48 | struct sk_buff *skb); /* chaining */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | struct atm_qdisc_data *parent; /* parent qdisc */ |
| 50 | struct socket *sock; /* for closing */ |
| 51 | u32 classid; /* x:y type ID */ |
| 52 | int ref; /* reference count */ |
Eric Dumazet | c1a8f1f | 2009-08-16 09:36:49 +0000 | [diff] [blame] | 53 | struct gnet_stats_basic_packed bstats; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | struct gnet_stats_queue qstats; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | struct atm_flow_data *next; |
| 56 | struct atm_flow_data *excess; /* flow for excess traffic; |
| 57 | NULL to set CLP instead */ |
| 58 | int hdr_len; |
| 59 | unsigned char hdr[0]; /* header data; MUST BE LAST */ |
| 60 | }; |
| 61 | |
| 62 | struct atm_qdisc_data { |
| 63 | struct atm_flow_data link; /* unclassified skbs go here */ |
| 64 | struct atm_flow_data *flows; /* NB: "link" is also on this |
| 65 | list */ |
Jarek Poplawski | f30ab41 | 2008-11-13 22:56:30 -0800 | [diff] [blame] | 66 | struct tasklet_struct task; /* dequeue tasklet */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | }; |
| 68 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | /* ------------------------- Class/flow operations ------------------------- */ |
| 70 | |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 71 | static int find_flow(struct atm_qdisc_data *qdisc, struct atm_flow_data *flow) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | { |
| 73 | struct atm_flow_data *walk; |
| 74 | |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 75 | pr_debug("find_flow(qdisc %p,flow %p)\n", qdisc, flow); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | for (walk = qdisc->flows; walk; walk = walk->next) |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 77 | if (walk == flow) |
| 78 | return 1; |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 79 | pr_debug("find_flow: not found\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | return 0; |
| 81 | } |
| 82 | |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 83 | 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] | 84 | { |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 85 | struct atm_qdisc_data *p = qdisc_priv(sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | struct atm_flow_data *flow; |
| 87 | |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 88 | for (flow = p->flows; flow; flow = flow->next) |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 89 | if (flow->classid == classid) |
| 90 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | return flow; |
| 92 | } |
| 93 | |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 94 | static int atm_tc_graft(struct Qdisc *sch, unsigned long arg, |
| 95 | struct Qdisc *new, struct Qdisc **old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | { |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 97 | struct atm_qdisc_data *p = qdisc_priv(sch); |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 98 | struct atm_flow_data *flow = (struct atm_flow_data *)arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 100 | 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] | 101 | sch, p, flow, new, old); |
| 102 | if (!find_flow(p, flow)) |
| 103 | return -EINVAL; |
| 104 | if (!new) |
| 105 | new = &noop_qdisc; |
Patrick McHardy | b94c8af | 2008-11-20 04:11:36 -0800 | [diff] [blame] | 106 | *old = flow->q; |
| 107 | flow->q = new; |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 108 | if (*old) |
| 109 | qdisc_reset(*old); |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 110 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | } |
| 112 | |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 113 | static struct Qdisc *atm_tc_leaf(struct Qdisc *sch, unsigned long cl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | { |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 115 | struct atm_flow_data *flow = (struct atm_flow_data *)cl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 117 | pr_debug("atm_tc_leaf(sch %p,flow %p)\n", sch, flow); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | return flow ? flow->q : NULL; |
| 119 | } |
| 120 | |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 121 | static unsigned long atm_tc_get(struct Qdisc *sch, u32 classid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | { |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 123 | struct atm_qdisc_data *p __maybe_unused = qdisc_priv(sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | struct atm_flow_data *flow; |
| 125 | |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 126 | pr_debug("atm_tc_get(sch %p,[qdisc %p],classid %x)\n", sch, p, classid); |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 127 | flow = lookup_flow(sch, classid); |
| 128 | if (flow) |
| 129 | flow->ref++; |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 130 | pr_debug("atm_tc_get: flow %p\n", flow); |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 131 | return (unsigned long)flow; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | } |
| 133 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | static unsigned long atm_tc_bind_filter(struct Qdisc *sch, |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 135 | unsigned long parent, u32 classid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | { |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 137 | return atm_tc_get(sch, classid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | } |
| 139 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | /* |
| 141 | * atm_tc_put handles all destructions, including the ones that are explicitly |
| 142 | * requested (atm_tc_destroy, etc.). The assumption here is that we never drop |
| 143 | * anything that still seems to be in use. |
| 144 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | static void atm_tc_put(struct Qdisc *sch, unsigned long cl) |
| 146 | { |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 147 | struct atm_qdisc_data *p = qdisc_priv(sch); |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 148 | struct atm_flow_data *flow = (struct atm_flow_data *)cl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | struct atm_flow_data **prev; |
| 150 | |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 151 | 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] | 152 | if (--flow->ref) |
| 153 | return; |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 154 | pr_debug("atm_tc_put: destroying\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | for (prev = &p->flows; *prev; prev = &(*prev)->next) |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 156 | if (*prev == flow) |
| 157 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | if (!*prev) { |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 159 | printk(KERN_CRIT "atm_tc_put: class %p not found\n", flow); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | return; |
| 161 | } |
| 162 | *prev = flow->next; |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 163 | pr_debug("atm_tc_put: qdisc %p\n", flow->q); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | qdisc_destroy(flow->q); |
Patrick McHardy | ff31ab5 | 2008-07-01 19:52:38 -0700 | [diff] [blame] | 165 | tcf_destroy_chain(&flow->filter_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | if (flow->sock) { |
Al Viro | 516e0cc | 2008-07-26 00:39:17 -0400 | [diff] [blame] | 167 | pr_debug("atm_tc_put: f_count %ld\n", |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 168 | file_count(flow->sock->file)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | flow->vcc->pop = flow->old_pop; |
| 170 | sockfd_put(flow->sock); |
| 171 | } |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 172 | if (flow->excess) |
| 173 | atm_tc_put(sch, (unsigned long)flow->excess); |
| 174 | if (flow != &p->link) |
| 175 | kfree(flow); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | /* |
| 177 | * If flow == &p->link, the qdisc no longer works at this point and |
| 178 | * needs to be removed. (By the caller of atm_tc_put.) |
| 179 | */ |
| 180 | } |
| 181 | |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 182 | 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] | 183 | { |
| 184 | struct atm_qdisc_data *p = VCC2FLOW(vcc)->parent; |
| 185 | |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 186 | 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] | 187 | VCC2FLOW(vcc)->old_pop(vcc, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | tasklet_schedule(&p->task); |
| 189 | } |
| 190 | |
| 191 | static const u8 llc_oui_ip[] = { |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 192 | 0xaa, /* DSAP: non-ISO */ |
| 193 | 0xaa, /* SSAP: non-ISO */ |
| 194 | 0x03, /* Ctrl: Unnumbered Information Command PDU */ |
| 195 | 0x00, /* OUI: EtherType */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | 0x00, 0x00, |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 197 | 0x08, 0x00 |
| 198 | }; /* Ethertype IP (0800) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | |
Patrick McHardy | 27a3421 | 2008-01-23 20:35:39 -0800 | [diff] [blame] | 200 | static const struct nla_policy atm_policy[TCA_ATM_MAX + 1] = { |
| 201 | [TCA_ATM_FD] = { .type = NLA_U32 }, |
| 202 | [TCA_ATM_EXCESS] = { .type = NLA_U32 }, |
| 203 | }; |
| 204 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | static int atm_tc_change(struct Qdisc *sch, u32 classid, u32 parent, |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 206 | struct nlattr **tca, unsigned long *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | { |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 208 | struct atm_qdisc_data *p = qdisc_priv(sch); |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 209 | struct atm_flow_data *flow = (struct atm_flow_data *)*arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | struct atm_flow_data *excess = NULL; |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 211 | struct nlattr *opt = tca[TCA_OPTIONS]; |
| 212 | struct nlattr *tb[TCA_ATM_MAX + 1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | struct socket *sock; |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 214 | int fd, error, hdr_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | void *hdr; |
| 216 | |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 217 | 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] | 218 | "flow %p,opt %p)\n", sch, p, classid, parent, flow, opt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | /* |
| 220 | * The concept of parents doesn't apply for this qdisc. |
| 221 | */ |
| 222 | if (parent && parent != TC_H_ROOT && parent != sch->handle) |
| 223 | return -EINVAL; |
| 224 | /* |
| 225 | * ATM classes cannot be changed. In order to change properties of the |
| 226 | * ATM connection, that socket needs to be modified directly (via the |
| 227 | * native ATM API. In order to send a flow to a different VC, the old |
| 228 | * class needs to be removed and a new one added. (This may be changed |
| 229 | * later.) |
| 230 | */ |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 231 | if (flow) |
| 232 | return -EBUSY; |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 233 | if (opt == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | return -EINVAL; |
Patrick McHardy | 27a3421 | 2008-01-23 20:35:39 -0800 | [diff] [blame] | 235 | |
| 236 | error = nla_parse_nested(tb, TCA_ATM_MAX, opt, atm_policy); |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 237 | if (error < 0) |
| 238 | return error; |
| 239 | |
Patrick McHardy | 27a3421 | 2008-01-23 20:35:39 -0800 | [diff] [blame] | 240 | if (!tb[TCA_ATM_FD]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | return -EINVAL; |
Patrick McHardy | 1587bac | 2008-01-23 20:35:03 -0800 | [diff] [blame] | 242 | fd = nla_get_u32(tb[TCA_ATM_FD]); |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 243 | pr_debug("atm_tc_change: fd %d\n", fd); |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 244 | if (tb[TCA_ATM_HDR]) { |
| 245 | hdr_len = nla_len(tb[TCA_ATM_HDR]); |
| 246 | hdr = nla_data(tb[TCA_ATM_HDR]); |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 247 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | hdr_len = RFC1483LLC_LEN; |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 249 | hdr = NULL; /* default LLC/SNAP for IP */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | } |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 251 | if (!tb[TCA_ATM_EXCESS]) |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 252 | excess = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | else { |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 254 | excess = (struct atm_flow_data *) |
Patrick McHardy | 1587bac | 2008-01-23 20:35:03 -0800 | [diff] [blame] | 255 | atm_tc_get(sch, nla_get_u32(tb[TCA_ATM_EXCESS])); |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 256 | if (!excess) |
| 257 | return -ENOENT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | } |
Patrick McHardy | f5e5cb7 | 2008-01-23 20:32:06 -0800 | [diff] [blame] | 259 | 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] | 260 | opt->nla_type, nla_len(opt), hdr_len); |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 261 | sock = sockfd_lookup(fd, &error); |
| 262 | if (!sock) |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 263 | return error; /* f_count++ */ |
Al Viro | 516e0cc | 2008-07-26 00:39:17 -0400 | [diff] [blame] | 264 | 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] | 265 | if (sock->ops->family != PF_ATMSVC && sock->ops->family != PF_ATMPVC) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | error = -EPROTOTYPE; |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 267 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | } |
| 269 | /* @@@ should check if the socket is really operational or we'll crash |
| 270 | on vcc->send */ |
| 271 | if (classid) { |
| 272 | if (TC_H_MAJ(classid ^ sch->handle)) { |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 273 | pr_debug("atm_tc_change: classid mismatch\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | error = -EINVAL; |
| 275 | goto err_out; |
| 276 | } |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 277 | if (find_flow(p, flow)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | error = -EEXIST; |
| 279 | goto err_out; |
| 280 | } |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 281 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | int i; |
| 283 | unsigned long cl; |
| 284 | |
| 285 | for (i = 1; i < 0x8000; i++) { |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 286 | classid = TC_H_MAKE(sch->handle, 0x8000 | i); |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 287 | cl = atm_tc_get(sch, classid); |
| 288 | if (!cl) |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 289 | break; |
| 290 | atm_tc_put(sch, cl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | } |
| 292 | } |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 293 | pr_debug("atm_tc_change: new id %x\n", classid); |
vignesh babu | 782f795 | 2007-07-16 18:30:36 -0700 | [diff] [blame] | 294 | flow = kzalloc(sizeof(struct atm_flow_data) + hdr_len, GFP_KERNEL); |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 295 | pr_debug("atm_tc_change: flow %p\n", flow); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | if (!flow) { |
| 297 | error = -ENOBUFS; |
| 298 | goto err_out; |
| 299 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | flow->filter_list = NULL; |
David S. Miller | 5ce2d48 | 2008-07-08 17:06:30 -0700 | [diff] [blame] | 301 | flow->q = qdisc_create_dflt(qdisc_dev(sch), sch->dev_queue, |
David S. Miller | bb949fb | 2008-07-08 16:55:56 -0700 | [diff] [blame] | 302 | &pfifo_qdisc_ops, classid); |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 303 | if (!flow->q) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | flow->q = &noop_qdisc; |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 305 | pr_debug("atm_tc_change: qdisc %p\n", flow->q); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | flow->sock = sock; |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 307 | flow->vcc = ATM_SD(sock); /* speedup */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | flow->vcc->user_back = flow; |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 309 | pr_debug("atm_tc_change: vcc %p\n", flow->vcc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | flow->old_pop = flow->vcc->pop; |
| 311 | flow->parent = p; |
| 312 | flow->vcc->pop = sch_atm_pop; |
| 313 | flow->classid = classid; |
| 314 | flow->ref = 1; |
| 315 | flow->excess = excess; |
| 316 | flow->next = p->link.next; |
| 317 | p->link.next = flow; |
| 318 | flow->hdr_len = hdr_len; |
| 319 | if (hdr) |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 320 | memcpy(flow->hdr, hdr, hdr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | else |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 322 | memcpy(flow->hdr, llc_oui_ip, sizeof(llc_oui_ip)); |
| 323 | *arg = (unsigned long)flow; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | return 0; |
| 325 | err_out: |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 326 | if (excess) |
| 327 | atm_tc_put(sch, (unsigned long)excess); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | sockfd_put(sock); |
| 329 | return error; |
| 330 | } |
| 331 | |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 332 | static int atm_tc_delete(struct Qdisc *sch, unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | { |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 334 | struct atm_qdisc_data *p = qdisc_priv(sch); |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 335 | struct atm_flow_data *flow = (struct atm_flow_data *)arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 337 | pr_debug("atm_tc_delete(sch %p,[qdisc %p],flow %p)\n", sch, p, flow); |
| 338 | if (!find_flow(qdisc_priv(sch), flow)) |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 339 | return -EINVAL; |
| 340 | if (flow->filter_list || flow == &p->link) |
| 341 | return -EBUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | /* |
| 343 | * Reference count must be 2: one for "keepalive" (set at class |
| 344 | * creation), and one for the reference held when calling delete. |
| 345 | */ |
| 346 | if (flow->ref < 2) { |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 347 | printk(KERN_ERR "atm_tc_delete: flow->ref == %d\n", flow->ref); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | return -EINVAL; |
| 349 | } |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 350 | if (flow->ref > 2) |
| 351 | return -EBUSY; /* catch references via excess, etc. */ |
| 352 | atm_tc_put(sch, arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | return 0; |
| 354 | } |
| 355 | |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 356 | static void atm_tc_walk(struct Qdisc *sch, struct qdisc_walker *walker) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | { |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 358 | struct atm_qdisc_data *p = qdisc_priv(sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | struct atm_flow_data *flow; |
| 360 | |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 361 | 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] | 362 | if (walker->stop) |
| 363 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | for (flow = p->flows; flow; flow = flow->next) { |
| 365 | if (walker->count >= walker->skip) |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 366 | if (walker->fn(sch, (unsigned long)flow, walker) < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | walker->stop = 1; |
| 368 | break; |
| 369 | } |
| 370 | walker->count++; |
| 371 | } |
| 372 | } |
| 373 | |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 374 | static struct tcf_proto **atm_tc_find_tcf(struct Qdisc *sch, unsigned long cl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | { |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 376 | struct atm_qdisc_data *p = qdisc_priv(sch); |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 377 | struct atm_flow_data *flow = (struct atm_flow_data *)cl; |
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_find_tcf(sch %p,[qdisc %p],flow %p)\n", sch, p, flow); |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 380 | return flow ? &flow->filter_list : &p->link.filter_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | } |
| 382 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | /* --------------------------- Qdisc operations ---------------------------- */ |
| 384 | |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 385 | static int atm_tc_enqueue(struct sk_buff *skb, struct Qdisc *sch) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | { |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 387 | struct atm_qdisc_data *p = qdisc_priv(sch); |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 388 | struct atm_flow_data *flow = NULL; /* @@@ */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | struct tcf_result res; |
| 390 | int result; |
| 391 | int ret = NET_XMIT_POLICED; |
| 392 | |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 393 | pr_debug("atm_tc_enqueue(skb %p,sch %p,[qdisc %p])\n", skb, sch, p); |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 394 | result = TC_POLICE_OK; /* be nice to gcc */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | if (TC_H_MAJ(skb->priority) != sch->handle || |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 396 | !(flow = (struct atm_flow_data *)atm_tc_get(sch, skb->priority))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | for (flow = p->flows; flow; flow = flow->next) |
| 398 | if (flow->filter_list) { |
Patrick McHardy | 73ca491 | 2007-07-15 00:02:31 -0700 | [diff] [blame] | 399 | result = tc_classify_compat(skb, |
| 400 | flow->filter_list, |
| 401 | &res); |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 402 | if (result < 0) |
| 403 | continue; |
| 404 | flow = (struct atm_flow_data *)res.class; |
| 405 | if (!flow) |
| 406 | flow = lookup_flow(sch, res.classid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | break; |
| 408 | } |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 409 | if (!flow) |
| 410 | flow = &p->link; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | else { |
| 412 | if (flow->vcc) |
| 413 | ATM_SKB(skb)->atm_options = flow->vcc->atm_options; |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 414 | /*@@@ looks good ... but it's not supposed to work :-) */ |
Patrick McHardy | 9210080 | 2007-07-15 00:01:49 -0700 | [diff] [blame] | 415 | #ifdef CONFIG_NET_CLS_ACT |
| 416 | switch (result) { |
| 417 | case TC_ACT_QUEUED: |
| 418 | case TC_ACT_STOLEN: |
| 419 | kfree_skb(skb); |
Jarek Poplawski | 378a2f0 | 2008-08-04 22:31:03 -0700 | [diff] [blame] | 420 | return NET_XMIT_SUCCESS | __NET_XMIT_STOLEN; |
Patrick McHardy | 9210080 | 2007-07-15 00:01:49 -0700 | [diff] [blame] | 421 | case TC_ACT_SHOT: |
| 422 | kfree_skb(skb); |
| 423 | goto drop; |
Patrick McHardy | 73ca491 | 2007-07-15 00:02:31 -0700 | [diff] [blame] | 424 | case TC_POLICE_RECLASSIFY: |
| 425 | if (flow->excess) |
| 426 | flow = flow->excess; |
| 427 | else |
| 428 | ATM_SKB(skb)->atm_options |= ATM_ATMOPT_CLP; |
| 429 | break; |
Patrick McHardy | 9210080 | 2007-07-15 00:01:49 -0700 | [diff] [blame] | 430 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | #endif |
| 432 | } |
Patrick McHardy | c3bc7cf | 2007-07-15 00:03:05 -0700 | [diff] [blame] | 433 | |
Jussi Kivilinna | 5f86173 | 2008-07-20 00:08:04 -0700 | [diff] [blame] | 434 | ret = qdisc_enqueue(skb, flow->q); |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 435 | if (ret != 0) { |
Patrick McHardy | 9210080 | 2007-07-15 00:01:49 -0700 | [diff] [blame] | 436 | drop: __maybe_unused |
Jarek Poplawski | 378a2f0 | 2008-08-04 22:31:03 -0700 | [diff] [blame] | 437 | if (net_xmit_drop_count(ret)) { |
| 438 | sch->qstats.drops++; |
| 439 | if (flow) |
| 440 | flow->qstats.drops++; |
| 441 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | return ret; |
| 443 | } |
Jussi Kivilinna | 0abf77e | 2008-07-20 00:08:27 -0700 | [diff] [blame] | 444 | sch->bstats.bytes += qdisc_pkt_len(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | sch->bstats.packets++; |
Jussi Kivilinna | 0abf77e | 2008-07-20 00:08:27 -0700 | [diff] [blame] | 446 | flow->bstats.bytes += qdisc_pkt_len(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | flow->bstats.packets++; |
| 448 | /* |
| 449 | * Okay, this may seem weird. We pretend we've dropped the packet if |
| 450 | * it goes via ATM. The reason for this is that the outer qdisc |
| 451 | * expects to be able to q->dequeue the packet later on if we return |
| 452 | * success at this place. Also, sch->q.qdisc needs to reflect whether |
| 453 | * there is a packet egligible for dequeuing or not. Note that the |
| 454 | * statistics of the outer qdisc are necessarily wrong because of all |
| 455 | * this. There's currently no correct solution for this. |
| 456 | */ |
| 457 | if (flow == &p->link) { |
| 458 | sch->q.qlen++; |
| 459 | return 0; |
| 460 | } |
| 461 | tasklet_schedule(&p->task); |
Jarek Poplawski | c27f339 | 2008-08-04 22:39:11 -0700 | [diff] [blame] | 462 | return NET_XMIT_SUCCESS | __NET_XMIT_BYPASS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | } |
| 464 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | /* |
| 466 | * Dequeue packets and send them over ATM. Note that we quite deliberately |
| 467 | * avoid checking net_device's flow control here, simply because sch_atm |
| 468 | * uses its own channels, which have nothing to do with any CLIP/LANE/or |
| 469 | * non-ATM interfaces. |
| 470 | */ |
| 471 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | static void sch_atm_dequeue(unsigned long data) |
| 473 | { |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 474 | struct Qdisc *sch = (struct Qdisc *)data; |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 475 | struct atm_qdisc_data *p = qdisc_priv(sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | struct atm_flow_data *flow; |
| 477 | struct sk_buff *skb; |
| 478 | |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 479 | pr_debug("sch_atm_dequeue(sch %p,[qdisc %p])\n", sch, p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | for (flow = p->link.next; flow; flow = flow->next) |
| 481 | /* |
| 482 | * If traffic is properly shaped, this won't generate nasty |
| 483 | * little bursts. Otherwise, it may ... (but that's okay) |
| 484 | */ |
Jarek Poplawski | 03c05f0 | 2008-10-31 00:46:19 -0700 | [diff] [blame] | 485 | while ((skb = flow->q->ops->peek(flow->q))) { |
| 486 | if (!atm_may_send(flow->vcc, skb->truesize)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | break; |
Jarek Poplawski | 03c05f0 | 2008-10-31 00:46:19 -0700 | [diff] [blame] | 488 | |
Jarek Poplawski | 77be155 | 2008-10-31 00:47:01 -0700 | [diff] [blame] | 489 | skb = qdisc_dequeue_peeked(flow->q); |
Jarek Poplawski | 03c05f0 | 2008-10-31 00:46:19 -0700 | [diff] [blame] | 490 | if (unlikely(!skb)) |
| 491 | break; |
| 492 | |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 493 | pr_debug("atm_tc_dequeue: sending on class %p\n", flow); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | /* remove any LL header somebody else has attached */ |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 495 | skb_pull(skb, skb_network_offset(skb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | if (skb_headroom(skb) < flow->hdr_len) { |
| 497 | struct sk_buff *new; |
| 498 | |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 499 | new = skb_realloc_headroom(skb, flow->hdr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | dev_kfree_skb(skb); |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 501 | if (!new) |
| 502 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | skb = new; |
| 504 | } |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 505 | pr_debug("sch_atm_dequeue: ip %p, data %p\n", |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 506 | skb_network_header(skb), skb->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | ATM_SKB(skb)->vcc = flow->vcc; |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 508 | memcpy(skb_push(skb, flow->hdr_len), flow->hdr, |
| 509 | flow->hdr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | atomic_add(skb->truesize, |
| 511 | &sk_atm(flow->vcc)->sk_wmem_alloc); |
| 512 | /* atm.atm_options are already set by atm_tc_enqueue */ |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 513 | flow->vcc->send(flow->vcc, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | } |
| 515 | } |
| 516 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | static struct sk_buff *atm_tc_dequeue(struct Qdisc *sch) |
| 518 | { |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 519 | struct atm_qdisc_data *p = qdisc_priv(sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | struct sk_buff *skb; |
| 521 | |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 522 | pr_debug("atm_tc_dequeue(sch %p,[qdisc %p])\n", sch, p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | tasklet_schedule(&p->task); |
Jarek Poplawski | 77be155 | 2008-10-31 00:47:01 -0700 | [diff] [blame] | 524 | skb = qdisc_dequeue_peeked(p->link.q); |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 525 | if (skb) |
| 526 | sch->q.qlen--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | return skb; |
| 528 | } |
| 529 | |
Jarek Poplawski | 8e3af97 | 2008-10-31 00:45:55 -0700 | [diff] [blame] | 530 | static struct sk_buff *atm_tc_peek(struct Qdisc *sch) |
| 531 | { |
| 532 | struct atm_qdisc_data *p = qdisc_priv(sch); |
| 533 | |
| 534 | pr_debug("atm_tc_peek(sch %p,[qdisc %p])\n", sch, p); |
| 535 | |
| 536 | return p->link.q->ops->peek(p->link.q); |
| 537 | } |
| 538 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | static unsigned int atm_tc_drop(struct Qdisc *sch) |
| 540 | { |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 541 | struct atm_qdisc_data *p = qdisc_priv(sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | struct atm_flow_data *flow; |
| 543 | unsigned int len; |
| 544 | |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 545 | pr_debug("atm_tc_drop(sch %p,[qdisc %p])\n", sch, p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | for (flow = p->flows; flow; flow = flow->next) |
| 547 | if (flow->q->ops->drop && (len = flow->q->ops->drop(flow->q))) |
| 548 | return len; |
| 549 | return 0; |
| 550 | } |
| 551 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 552 | static int atm_tc_init(struct Qdisc *sch, struct nlattr *opt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | { |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 554 | struct atm_qdisc_data *p = qdisc_priv(sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 556 | pr_debug("atm_tc_init(sch %p,[qdisc %p],opt %p)\n", sch, p, opt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | p->flows = &p->link; |
David S. Miller | 5ce2d48 | 2008-07-08 17:06:30 -0700 | [diff] [blame] | 558 | p->link.q = qdisc_create_dflt(qdisc_dev(sch), sch->dev_queue, |
David S. Miller | bb949fb | 2008-07-08 16:55:56 -0700 | [diff] [blame] | 559 | &pfifo_qdisc_ops, sch->handle); |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 560 | if (!p->link.q) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | p->link.q = &noop_qdisc; |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 562 | pr_debug("atm_tc_init: link (%p) qdisc %p\n", &p->link, p->link.q); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | p->link.filter_list = NULL; |
| 564 | p->link.vcc = NULL; |
| 565 | p->link.sock = NULL; |
| 566 | p->link.classid = sch->handle; |
| 567 | p->link.ref = 1; |
| 568 | p->link.next = NULL; |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 569 | tasklet_init(&p->task, sch_atm_dequeue, (unsigned long)sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | return 0; |
| 571 | } |
| 572 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | static void atm_tc_reset(struct Qdisc *sch) |
| 574 | { |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 575 | struct atm_qdisc_data *p = qdisc_priv(sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | struct atm_flow_data *flow; |
| 577 | |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 578 | pr_debug("atm_tc_reset(sch %p,[qdisc %p])\n", sch, p); |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 579 | for (flow = p->flows; flow; flow = flow->next) |
| 580 | qdisc_reset(flow->q); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | sch->q.qlen = 0; |
| 582 | } |
| 583 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | static void atm_tc_destroy(struct Qdisc *sch) |
| 585 | { |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 586 | struct atm_qdisc_data *p = qdisc_priv(sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | struct atm_flow_data *flow; |
| 588 | |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 589 | pr_debug("atm_tc_destroy(sch %p,[qdisc %p])\n", sch, p); |
Patrick McHardy | a4aebb8 | 2008-07-01 19:53:09 -0700 | [diff] [blame] | 590 | for (flow = p->flows; flow; flow = flow->next) |
| 591 | tcf_destroy_chain(&flow->filter_list); |
| 592 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | /* races ? */ |
| 594 | while ((flow = p->flows)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | if (flow->ref > 1) |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 596 | printk(KERN_ERR "atm_destroy: %p->ref = %d\n", flow, |
| 597 | flow->ref); |
| 598 | atm_tc_put(sch, (unsigned long)flow); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | if (p->flows == flow) { |
| 600 | printk(KERN_ERR "atm_destroy: putting flow %p didn't " |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 601 | "kill it\n", flow); |
| 602 | p->flows = flow->next; /* brute force */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | break; |
| 604 | } |
| 605 | } |
| 606 | tasklet_kill(&p->task); |
| 607 | } |
| 608 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | static int atm_tc_dump_class(struct Qdisc *sch, unsigned long cl, |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 610 | struct sk_buff *skb, struct tcmsg *tcm) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | { |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 612 | struct atm_qdisc_data *p = qdisc_priv(sch); |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 613 | struct atm_flow_data *flow = (struct atm_flow_data *)cl; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 614 | struct nlattr *nest; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | |
Stephen Hemminger | 786a903 | 2008-01-21 02:25:29 -0800 | [diff] [blame] | 616 | 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] | 617 | sch, p, flow, skb, tcm); |
| 618 | if (!find_flow(p, flow)) |
| 619 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | tcm->tcm_handle = flow->classid; |
Patrick McHardy | cdc7f8e | 2006-03-20 19:01:06 -0800 | [diff] [blame] | 621 | tcm->tcm_info = flow->q->handle; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 622 | |
| 623 | nest = nla_nest_start(skb, TCA_OPTIONS); |
| 624 | if (nest == NULL) |
| 625 | goto nla_put_failure; |
| 626 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 627 | NLA_PUT(skb, TCA_ATM_HDR, flow->hdr_len, flow->hdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | if (flow->vcc) { |
| 629 | struct sockaddr_atmpvc pvc; |
| 630 | int state; |
| 631 | |
| 632 | pvc.sap_family = AF_ATMPVC; |
| 633 | pvc.sap_addr.itf = flow->vcc->dev ? flow->vcc->dev->number : -1; |
| 634 | pvc.sap_addr.vpi = flow->vcc->vpi; |
| 635 | pvc.sap_addr.vci = flow->vcc->vci; |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 636 | NLA_PUT(skb, TCA_ATM_ADDR, sizeof(pvc), &pvc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | state = ATM_VF2VS(flow->vcc->flags); |
Patrick McHardy | 24beeab | 2008-01-23 20:34:48 -0800 | [diff] [blame] | 638 | NLA_PUT_U32(skb, TCA_ATM_STATE, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | } |
| 640 | if (flow->excess) |
Patrick McHardy | 24beeab | 2008-01-23 20:34:48 -0800 | [diff] [blame] | 641 | NLA_PUT_U32(skb, TCA_ATM_EXCESS, flow->classid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | else { |
Patrick McHardy | 24beeab | 2008-01-23 20:34:48 -0800 | [diff] [blame] | 643 | NLA_PUT_U32(skb, TCA_ATM_EXCESS, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | } |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 645 | |
| 646 | nla_nest_end(skb, nest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | return skb->len; |
| 648 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 649 | nla_put_failure: |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 650 | nla_nest_cancel(skb, nest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | return -1; |
| 652 | } |
| 653 | static int |
| 654 | atm_tc_dump_class_stats(struct Qdisc *sch, unsigned long arg, |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 655 | struct gnet_dump *d) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | { |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 657 | struct atm_flow_data *flow = (struct atm_flow_data *)arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | |
| 659 | flow->qstats.qlen = flow->q->q.qlen; |
| 660 | |
| 661 | if (gnet_stats_copy_basic(d, &flow->bstats) < 0 || |
| 662 | gnet_stats_copy_queue(d, &flow->qstats) < 0) |
| 663 | return -1; |
| 664 | |
| 665 | return 0; |
| 666 | } |
| 667 | |
| 668 | static int atm_tc_dump(struct Qdisc *sch, struct sk_buff *skb) |
| 669 | { |
| 670 | return 0; |
| 671 | } |
| 672 | |
Eric Dumazet | 20fea08 | 2007-11-14 01:44:41 -0800 | [diff] [blame] | 673 | static const struct Qdisc_class_ops atm_class_ops = { |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 674 | .graft = atm_tc_graft, |
| 675 | .leaf = atm_tc_leaf, |
| 676 | .get = atm_tc_get, |
| 677 | .put = atm_tc_put, |
| 678 | .change = atm_tc_change, |
| 679 | .delete = atm_tc_delete, |
| 680 | .walk = atm_tc_walk, |
| 681 | .tcf_chain = atm_tc_find_tcf, |
| 682 | .bind_tcf = atm_tc_bind_filter, |
| 683 | .unbind_tcf = atm_tc_put, |
| 684 | .dump = atm_tc_dump_class, |
| 685 | .dump_stats = atm_tc_dump_class_stats, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | }; |
| 687 | |
Eric Dumazet | 20fea08 | 2007-11-14 01:44:41 -0800 | [diff] [blame] | 688 | static struct Qdisc_ops atm_qdisc_ops __read_mostly = { |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 689 | .cl_ops = &atm_class_ops, |
| 690 | .id = "atm", |
| 691 | .priv_size = sizeof(struct atm_qdisc_data), |
| 692 | .enqueue = atm_tc_enqueue, |
| 693 | .dequeue = atm_tc_dequeue, |
Jarek Poplawski | 8e3af97 | 2008-10-31 00:45:55 -0700 | [diff] [blame] | 694 | .peek = atm_tc_peek, |
Patrick McHardy | b0188d4 | 2007-07-15 00:01:25 -0700 | [diff] [blame] | 695 | .drop = atm_tc_drop, |
| 696 | .init = atm_tc_init, |
| 697 | .reset = atm_tc_reset, |
| 698 | .destroy = atm_tc_destroy, |
| 699 | .dump = atm_tc_dump, |
| 700 | .owner = THIS_MODULE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | }; |
| 702 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | static int __init atm_init(void) |
| 704 | { |
| 705 | return register_qdisc(&atm_qdisc_ops); |
| 706 | } |
| 707 | |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 708 | static void __exit atm_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | { |
| 710 | unregister_qdisc(&atm_qdisc_ops); |
| 711 | } |
| 712 | |
| 713 | module_init(atm_init) |
| 714 | module_exit(atm_exit) |
| 715 | MODULE_LICENSE("GPL"); |