Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* net/sched/sch_dsmark.c - Differentiated Services field marker */ |
| 2 | |
| 3 | /* Written 1998-2000 by Werner Almesberger, EPFL ICA */ |
| 4 | |
| 5 | |
| 6 | #include <linux/config.h> |
| 7 | #include <linux/module.h> |
| 8 | #include <linux/init.h> |
| 9 | #include <linux/types.h> |
| 10 | #include <linux/string.h> |
| 11 | #include <linux/errno.h> |
| 12 | #include <linux/skbuff.h> |
| 13 | #include <linux/netdevice.h> /* for pkt_sched */ |
| 14 | #include <linux/rtnetlink.h> |
| 15 | #include <net/pkt_sched.h> |
| 16 | #include <net/dsfield.h> |
| 17 | #include <net/inet_ecn.h> |
| 18 | #include <asm/byteorder.h> |
| 19 | |
| 20 | |
Thomas Graf | 08e9cd1 | 2005-05-31 15:17:28 -0700 | [diff] [blame] | 21 | #if 0 /* control */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args) |
| 23 | #else |
| 24 | #define DPRINTK(format,args...) |
| 25 | #endif |
| 26 | |
| 27 | #if 0 /* data */ |
| 28 | #define D2PRINTK(format,args...) printk(KERN_DEBUG format,##args) |
| 29 | #else |
| 30 | #define D2PRINTK(format,args...) |
| 31 | #endif |
| 32 | |
| 33 | |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 34 | #define PRIV(sch) ((struct dsmark_qdisc_data *) qdisc_priv(sch)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
| 36 | |
| 37 | /* |
| 38 | * classid class marking |
| 39 | * ------- ----- ------- |
| 40 | * n/a 0 n/a |
| 41 | * x:0 1 use entry [0] |
| 42 | * ... ... ... |
| 43 | * x:y y>0 y+1 use entry [y] |
| 44 | * ... ... ... |
| 45 | * x:indices-1 indices use entry [indices-1] |
| 46 | * ... ... ... |
| 47 | * x:y y+1 use entry [y & (indices-1)] |
| 48 | * ... ... ... |
| 49 | * 0xffff 0x10000 use entry [indices-1] |
| 50 | */ |
| 51 | |
| 52 | |
| 53 | #define NO_DEFAULT_INDEX (1 << 16) |
| 54 | |
| 55 | struct dsmark_qdisc_data { |
| 56 | struct Qdisc *q; |
| 57 | struct tcf_proto *filter_list; |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 58 | u8 *mask; /* "owns" the array */ |
| 59 | u8 *value; |
| 60 | u16 indices; |
| 61 | u32 default_index; /* index range is 0...0xffff */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | int set_tc_index; |
| 63 | }; |
| 64 | |
Thomas Graf | 758cc43 | 2005-06-18 22:52:54 -0700 | [diff] [blame] | 65 | static inline int dsmark_valid_indices(u16 indices) |
| 66 | { |
| 67 | while (indices != 1) { |
| 68 | if (indices & 1) |
| 69 | return 0; |
| 70 | indices >>= 1; |
| 71 | } |
| 72 | |
| 73 | return 1; |
| 74 | } |
| 75 | |
| 76 | static inline int dsmark_valid_index(struct dsmark_qdisc_data *p, u16 index) |
| 77 | { |
| 78 | return (index <= p->indices && index > 0); |
| 79 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | |
| 81 | /* ------------------------- Class/flow operations ------------------------- */ |
| 82 | |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 83 | static int dsmark_graft(struct Qdisc *sch, unsigned long arg, |
| 84 | struct Qdisc *new, struct Qdisc **old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | { |
| 86 | struct dsmark_qdisc_data *p = PRIV(sch); |
| 87 | |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 88 | DPRINTK("dsmark_graft(sch %p,[qdisc %p],new %p,old %p)\n", |
| 89 | sch, p, new, old); |
Thomas Graf | 486b53e | 2005-05-31 15:16:52 -0700 | [diff] [blame] | 90 | |
| 91 | if (new == NULL) { |
| 92 | new = qdisc_create_dflt(sch->dev, &pfifo_qdisc_ops); |
| 93 | if (new == NULL) |
| 94 | new = &noop_qdisc; |
| 95 | } |
| 96 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | sch_tree_lock(sch); |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 98 | *old = xchg(&p->q, new); |
| 99 | qdisc_reset(*old); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | sch->q.qlen = 0; |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 101 | sch_tree_unlock(sch); |
| 102 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | return 0; |
| 104 | } |
| 105 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | static struct Qdisc *dsmark_leaf(struct Qdisc *sch, unsigned long arg) |
| 107 | { |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 108 | return PRIV(sch)->q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | } |
| 110 | |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 111 | static unsigned long dsmark_get(struct Qdisc *sch, u32 classid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | { |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 113 | DPRINTK("dsmark_get(sch %p,[qdisc %p],classid %x)\n", |
| 114 | sch, PRIV(sch), classid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 116 | return TC_H_MIN(classid) + 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | } |
| 118 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | static unsigned long dsmark_bind_filter(struct Qdisc *sch, |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 120 | unsigned long parent, u32 classid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | { |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 122 | return dsmark_get(sch, classid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | } |
| 124 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | static void dsmark_put(struct Qdisc *sch, unsigned long cl) |
| 126 | { |
| 127 | } |
| 128 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | static int dsmark_change(struct Qdisc *sch, u32 classid, u32 parent, |
Thomas Graf | 758cc43 | 2005-06-18 22:52:54 -0700 | [diff] [blame] | 130 | struct rtattr **tca, unsigned long *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | { |
| 132 | struct dsmark_qdisc_data *p = PRIV(sch); |
| 133 | struct rtattr *opt = tca[TCA_OPTIONS-1]; |
| 134 | struct rtattr *tb[TCA_DSMARK_MAX]; |
Thomas Graf | 758cc43 | 2005-06-18 22:52:54 -0700 | [diff] [blame] | 135 | int err = -EINVAL; |
| 136 | u8 mask = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | |
| 138 | DPRINTK("dsmark_change(sch %p,[qdisc %p],classid %x,parent %x)," |
Thomas Graf | 758cc43 | 2005-06-18 22:52:54 -0700 | [diff] [blame] | 139 | "arg 0x%lx\n", sch, p, classid, parent, *arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | |
Thomas Graf | 758cc43 | 2005-06-18 22:52:54 -0700 | [diff] [blame] | 141 | if (!dsmark_valid_index(p, *arg)) { |
| 142 | err = -ENOENT; |
| 143 | goto rtattr_failure; |
| 144 | } |
| 145 | |
| 146 | if (!opt || rtattr_parse_nested(tb, TCA_DSMARK_MAX, opt)) |
| 147 | goto rtattr_failure; |
| 148 | |
| 149 | if (tb[TCA_DSMARK_MASK-1]) |
| 150 | mask = RTA_GET_U8(tb[TCA_DSMARK_MASK-1]); |
| 151 | |
| 152 | if (tb[TCA_DSMARK_VALUE-1]) |
| 153 | p->value[*arg-1] = RTA_GET_U8(tb[TCA_DSMARK_VALUE-1]); |
| 154 | |
| 155 | if (tb[TCA_DSMARK_MASK-1]) |
| 156 | p->mask[*arg-1] = mask; |
| 157 | |
| 158 | err = 0; |
| 159 | |
| 160 | rtattr_failure: |
| 161 | return err; |
| 162 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 164 | static int dsmark_delete(struct Qdisc *sch, unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | { |
| 166 | struct dsmark_qdisc_data *p = PRIV(sch); |
| 167 | |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 168 | if (!dsmark_valid_index(p, arg)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | return -EINVAL; |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 170 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | p->mask[arg-1] = 0xff; |
| 172 | p->value[arg-1] = 0; |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 173 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | return 0; |
| 175 | } |
| 176 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | static void dsmark_walk(struct Qdisc *sch,struct qdisc_walker *walker) |
| 178 | { |
| 179 | struct dsmark_qdisc_data *p = PRIV(sch); |
| 180 | int i; |
| 181 | |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 182 | DPRINTK("dsmark_walk(sch %p,[qdisc %p],walker %p)\n", sch, p, walker); |
| 183 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | if (walker->stop) |
| 185 | return; |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 186 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | for (i = 0; i < p->indices; i++) { |
| 188 | if (p->mask[i] == 0xff && !p->value[i]) |
Thomas Graf | 0451eb0 | 2005-05-31 15:15:58 -0700 | [diff] [blame] | 189 | goto ignore; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | if (walker->count >= walker->skip) { |
| 191 | if (walker->fn(sch, i+1, walker) < 0) { |
| 192 | walker->stop = 1; |
| 193 | break; |
| 194 | } |
| 195 | } |
Thomas Graf | 0451eb0 | 2005-05-31 15:15:58 -0700 | [diff] [blame] | 196 | ignore: |
| 197 | walker->count++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | } |
| 199 | } |
| 200 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | static struct tcf_proto **dsmark_find_tcf(struct Qdisc *sch,unsigned long cl) |
| 202 | { |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 203 | return &PRIV(sch)->filter_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | } |
| 205 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | /* --------------------------- Qdisc operations ---------------------------- */ |
| 207 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | static int dsmark_enqueue(struct sk_buff *skb,struct Qdisc *sch) |
| 209 | { |
| 210 | struct dsmark_qdisc_data *p = PRIV(sch); |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 211 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 213 | D2PRINTK("dsmark_enqueue(skb %p,sch %p,[qdisc %p])\n", skb, sch, p); |
| 214 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | if (p->set_tc_index) { |
| 216 | /* FIXME: Safe with non-linear skbs? --RR */ |
| 217 | switch (skb->protocol) { |
| 218 | case __constant_htons(ETH_P_IP): |
| 219 | skb->tc_index = ipv4_get_dsfield(skb->nh.iph) |
| 220 | & ~INET_ECN_MASK; |
| 221 | break; |
| 222 | case __constant_htons(ETH_P_IPV6): |
| 223 | skb->tc_index = ipv6_get_dsfield(skb->nh.ipv6h) |
| 224 | & ~INET_ECN_MASK; |
| 225 | break; |
| 226 | default: |
| 227 | skb->tc_index = 0; |
| 228 | break; |
| 229 | }; |
| 230 | } |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 231 | |
| 232 | if (TC_H_MAJ(skb->priority) == sch->handle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | skb->tc_index = TC_H_MIN(skb->priority); |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 234 | else { |
| 235 | struct tcf_result res; |
| 236 | int result = tc_classify(skb, p->filter_list, &res); |
| 237 | |
| 238 | D2PRINTK("result %d class 0x%04x\n", result, res.classid); |
| 239 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | switch (result) { |
| 241 | #ifdef CONFIG_NET_CLS_POLICE |
| 242 | case TC_POLICE_SHOT: |
| 243 | kfree_skb(skb); |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 244 | sch->qstats.drops++; |
| 245 | return NET_XMIT_POLICED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | #if 0 |
| 247 | case TC_POLICE_RECLASSIFY: |
| 248 | /* FIXME: what to do here ??? */ |
| 249 | #endif |
| 250 | #endif |
| 251 | case TC_POLICE_OK: |
| 252 | skb->tc_index = TC_H_MIN(res.classid); |
| 253 | break; |
| 254 | case TC_POLICE_UNSPEC: |
| 255 | /* fall through */ |
| 256 | default: |
| 257 | if (p->default_index != NO_DEFAULT_INDEX) |
| 258 | skb->tc_index = p->default_index; |
| 259 | break; |
| 260 | }; |
| 261 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 263 | err = p->q->enqueue(skb,p->q); |
| 264 | if (err != NET_XMIT_SUCCESS) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | sch->qstats.drops++; |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 266 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | } |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 268 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | sch->bstats.bytes += skb->len; |
| 270 | sch->bstats.packets++; |
| 271 | sch->q.qlen++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 273 | return NET_XMIT_SUCCESS; |
| 274 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | |
| 276 | static struct sk_buff *dsmark_dequeue(struct Qdisc *sch) |
| 277 | { |
| 278 | struct dsmark_qdisc_data *p = PRIV(sch); |
| 279 | struct sk_buff *skb; |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 280 | u32 index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 282 | D2PRINTK("dsmark_dequeue(sch %p,[qdisc %p])\n", sch, p); |
| 283 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | skb = p->q->ops->dequeue(p->q); |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 285 | if (skb == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | return NULL; |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 287 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | sch->q.qlen--; |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 289 | |
| 290 | index = skb->tc_index & (p->indices - 1); |
| 291 | D2PRINTK("index %d->%d\n", skb->tc_index, index); |
| 292 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | switch (skb->protocol) { |
| 294 | case __constant_htons(ETH_P_IP): |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 295 | ipv4_change_dsfield(skb->nh.iph, p->mask[index], |
| 296 | p->value[index]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | break; |
| 298 | case __constant_htons(ETH_P_IPV6): |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 299 | ipv6_change_dsfield(skb->nh.ipv6h, p->mask[index], |
| 300 | p->value[index]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | break; |
| 302 | default: |
| 303 | /* |
| 304 | * Only complain if a change was actually attempted. |
| 305 | * This way, we can send non-IP traffic through dsmark |
| 306 | * and don't need yet another qdisc as a bypass. |
| 307 | */ |
| 308 | if (p->mask[index] != 0xff || p->value[index]) |
| 309 | printk(KERN_WARNING "dsmark_dequeue: " |
| 310 | "unsupported protocol %d\n", |
| 311 | htons(skb->protocol)); |
| 312 | break; |
| 313 | }; |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 314 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | return skb; |
| 316 | } |
| 317 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | static int dsmark_requeue(struct sk_buff *skb,struct Qdisc *sch) |
| 319 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | struct dsmark_qdisc_data *p = PRIV(sch); |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 321 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 323 | D2PRINTK("dsmark_requeue(skb %p,sch %p,[qdisc %p])\n", skb, sch, p); |
| 324 | |
| 325 | err = p->q->ops->requeue(skb, p->q); |
| 326 | if (err != NET_XMIT_SUCCESS) { |
| 327 | sch->qstats.drops++; |
| 328 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 331 | sch->q.qlen++; |
| 332 | sch->qstats.requeues++; |
| 333 | |
| 334 | return NET_XMIT_SUCCESS; |
| 335 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | |
| 337 | static unsigned int dsmark_drop(struct Qdisc *sch) |
| 338 | { |
| 339 | struct dsmark_qdisc_data *p = PRIV(sch); |
| 340 | unsigned int len; |
| 341 | |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 342 | DPRINTK("dsmark_reset(sch %p,[qdisc %p])\n", sch, p); |
| 343 | |
| 344 | if (p->q->ops->drop == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | return 0; |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 346 | |
| 347 | len = p->q->ops->drop(p->q); |
| 348 | if (len) |
| 349 | sch->q.qlen--; |
| 350 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | return len; |
| 352 | } |
| 353 | |
Thomas Graf | 758cc43 | 2005-06-18 22:52:54 -0700 | [diff] [blame] | 354 | static int dsmark_init(struct Qdisc *sch, struct rtattr *opt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | { |
| 356 | struct dsmark_qdisc_data *p = PRIV(sch); |
| 357 | struct rtattr *tb[TCA_DSMARK_MAX]; |
Thomas Graf | 758cc43 | 2005-06-18 22:52:54 -0700 | [diff] [blame] | 358 | int err = -EINVAL; |
| 359 | u32 default_index = NO_DEFAULT_INDEX; |
| 360 | u16 indices; |
| 361 | u8 *mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | |
Thomas Graf | 758cc43 | 2005-06-18 22:52:54 -0700 | [diff] [blame] | 363 | DPRINTK("dsmark_init(sch %p,[qdisc %p],opt %p)\n", sch, p, opt); |
| 364 | |
| 365 | if (!opt || rtattr_parse_nested(tb, TCA_DSMARK_MAX, opt) < 0) |
| 366 | goto errout; |
| 367 | |
| 368 | indices = RTA_GET_U16(tb[TCA_DSMARK_INDICES-1]); |
| 369 | if (!indices || !dsmark_valid_indices(indices)) |
| 370 | goto errout; |
| 371 | |
| 372 | if (tb[TCA_DSMARK_DEFAULT_INDEX-1]) |
| 373 | default_index = RTA_GET_U16(tb[TCA_DSMARK_DEFAULT_INDEX-1]); |
| 374 | |
| 375 | mask = kmalloc(indices * 2, GFP_KERNEL); |
| 376 | if (mask == NULL) { |
| 377 | err = -ENOMEM; |
| 378 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | } |
Thomas Graf | 758cc43 | 2005-06-18 22:52:54 -0700 | [diff] [blame] | 380 | |
| 381 | p->mask = mask; |
| 382 | memset(p->mask, 0xff, indices); |
| 383 | |
| 384 | p->value = p->mask + indices; |
| 385 | memset(p->value, 0, indices); |
| 386 | |
| 387 | p->indices = indices; |
| 388 | p->default_index = default_index; |
| 389 | p->set_tc_index = RTA_GET_FLAG(tb[TCA_DSMARK_SET_TC_INDEX-1]); |
| 390 | |
| 391 | p->q = qdisc_create_dflt(sch->dev, &pfifo_qdisc_ops); |
| 392 | if (p->q == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | p->q = &noop_qdisc; |
Thomas Graf | 758cc43 | 2005-06-18 22:52:54 -0700 | [diff] [blame] | 394 | |
| 395 | DPRINTK("dsmark_init: qdisc %p\n", p->q); |
| 396 | |
| 397 | err = 0; |
| 398 | errout: |
| 399 | rtattr_failure: |
| 400 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | } |
| 402 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | static void dsmark_reset(struct Qdisc *sch) |
| 404 | { |
| 405 | struct dsmark_qdisc_data *p = PRIV(sch); |
| 406 | |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 407 | DPRINTK("dsmark_reset(sch %p,[qdisc %p])\n", sch, p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | qdisc_reset(p->q); |
| 409 | sch->q.qlen = 0; |
| 410 | } |
| 411 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | static void dsmark_destroy(struct Qdisc *sch) |
| 413 | { |
| 414 | struct dsmark_qdisc_data *p = PRIV(sch); |
| 415 | struct tcf_proto *tp; |
| 416 | |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 417 | DPRINTK("dsmark_destroy(sch %p,[qdisc %p])\n", sch, p); |
| 418 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | while (p->filter_list) { |
| 420 | tp = p->filter_list; |
| 421 | p->filter_list = tp->next; |
| 422 | tcf_destroy(tp); |
| 423 | } |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 424 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | qdisc_destroy(p->q); |
| 426 | kfree(p->mask); |
| 427 | } |
| 428 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | static int dsmark_dump_class(struct Qdisc *sch, unsigned long cl, |
Thomas Graf | 02f23f0 | 2005-06-18 22:53:12 -0700 | [diff] [blame] | 430 | struct sk_buff *skb, struct tcmsg *tcm) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | { |
| 432 | struct dsmark_qdisc_data *p = PRIV(sch); |
Thomas Graf | 02f23f0 | 2005-06-18 22:53:12 -0700 | [diff] [blame] | 433 | struct rtattr *opts = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | |
Thomas Graf | 02f23f0 | 2005-06-18 22:53:12 -0700 | [diff] [blame] | 435 | DPRINTK("dsmark_dump_class(sch %p,[qdisc %p],class %ld\n", sch, p, cl); |
| 436 | |
| 437 | if (!dsmark_valid_index(p, cl)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | return -EINVAL; |
Thomas Graf | 02f23f0 | 2005-06-18 22:53:12 -0700 | [diff] [blame] | 439 | |
| 440 | tcm->tcm_handle = TC_H_MAKE(TC_H_MAJ(sch->handle), cl-1); |
Patrick McHardy | cdc7f8e | 2006-03-20 19:01:06 -0800 | [diff] [blame^] | 441 | tcm->tcm_info = p->q->handle; |
Thomas Graf | 02f23f0 | 2005-06-18 22:53:12 -0700 | [diff] [blame] | 442 | |
| 443 | opts = RTA_NEST(skb, TCA_OPTIONS); |
| 444 | RTA_PUT_U8(skb,TCA_DSMARK_MASK, p->mask[cl-1]); |
| 445 | RTA_PUT_U8(skb,TCA_DSMARK_VALUE, p->value[cl-1]); |
| 446 | |
| 447 | return RTA_NEST_END(skb, opts); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | |
| 449 | rtattr_failure: |
Thomas Graf | 02f23f0 | 2005-06-18 22:53:12 -0700 | [diff] [blame] | 450 | return RTA_NEST_CANCEL(skb, opts); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | } |
| 452 | |
| 453 | static int dsmark_dump(struct Qdisc *sch, struct sk_buff *skb) |
| 454 | { |
| 455 | struct dsmark_qdisc_data *p = PRIV(sch); |
Thomas Graf | 02f23f0 | 2005-06-18 22:53:12 -0700 | [diff] [blame] | 456 | struct rtattr *opts = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | |
Thomas Graf | 02f23f0 | 2005-06-18 22:53:12 -0700 | [diff] [blame] | 458 | opts = RTA_NEST(skb, TCA_OPTIONS); |
| 459 | RTA_PUT_U16(skb, TCA_DSMARK_INDICES, p->indices); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | |
Thomas Graf | 02f23f0 | 2005-06-18 22:53:12 -0700 | [diff] [blame] | 461 | if (p->default_index != NO_DEFAULT_INDEX) |
| 462 | RTA_PUT_U16(skb, TCA_DSMARK_DEFAULT_INDEX, p->default_index); |
| 463 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | if (p->set_tc_index) |
Thomas Graf | 02f23f0 | 2005-06-18 22:53:12 -0700 | [diff] [blame] | 465 | RTA_PUT_FLAG(skb, TCA_DSMARK_SET_TC_INDEX); |
| 466 | |
| 467 | return RTA_NEST_END(skb, opts); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | |
| 469 | rtattr_failure: |
Thomas Graf | 02f23f0 | 2005-06-18 22:53:12 -0700 | [diff] [blame] | 470 | return RTA_NEST_CANCEL(skb, opts); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | } |
| 472 | |
| 473 | static struct Qdisc_class_ops dsmark_class_ops = { |
| 474 | .graft = dsmark_graft, |
| 475 | .leaf = dsmark_leaf, |
| 476 | .get = dsmark_get, |
| 477 | .put = dsmark_put, |
| 478 | .change = dsmark_change, |
| 479 | .delete = dsmark_delete, |
| 480 | .walk = dsmark_walk, |
| 481 | .tcf_chain = dsmark_find_tcf, |
| 482 | .bind_tcf = dsmark_bind_filter, |
| 483 | .unbind_tcf = dsmark_put, |
| 484 | .dump = dsmark_dump_class, |
| 485 | }; |
| 486 | |
| 487 | static struct Qdisc_ops dsmark_qdisc_ops = { |
| 488 | .next = NULL, |
| 489 | .cl_ops = &dsmark_class_ops, |
| 490 | .id = "dsmark", |
| 491 | .priv_size = sizeof(struct dsmark_qdisc_data), |
| 492 | .enqueue = dsmark_enqueue, |
| 493 | .dequeue = dsmark_dequeue, |
| 494 | .requeue = dsmark_requeue, |
| 495 | .drop = dsmark_drop, |
| 496 | .init = dsmark_init, |
| 497 | .reset = dsmark_reset, |
| 498 | .destroy = dsmark_destroy, |
| 499 | .change = NULL, |
| 500 | .dump = dsmark_dump, |
| 501 | .owner = THIS_MODULE, |
| 502 | }; |
| 503 | |
| 504 | static int __init dsmark_module_init(void) |
| 505 | { |
| 506 | return register_qdisc(&dsmark_qdisc_ops); |
| 507 | } |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 508 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | static void __exit dsmark_module_exit(void) |
| 510 | { |
| 511 | unregister_qdisc(&dsmark_qdisc_ops); |
| 512 | } |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 513 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | module_init(dsmark_module_init) |
| 515 | module_exit(dsmark_module_exit) |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 516 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | MODULE_LICENSE("GPL"); |