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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | #include <linux/module.h> |
| 7 | #include <linux/init.h> |
| 8 | #include <linux/types.h> |
| 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/rtnetlink.h> |
David S. Miller | 5b0ac72 | 2008-01-21 02:21:45 -0800 | [diff] [blame] | 13 | #include <linux/bitops.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <net/pkt_sched.h> |
| 15 | #include <net/dsfield.h> |
| 16 | #include <net/inet_ecn.h> |
| 17 | #include <asm/byteorder.h> |
| 18 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | /* |
| 20 | * classid class marking |
| 21 | * ------- ----- ------- |
| 22 | * n/a 0 n/a |
| 23 | * x:0 1 use entry [0] |
| 24 | * ... ... ... |
| 25 | * x:y y>0 y+1 use entry [y] |
| 26 | * ... ... ... |
| 27 | * x:indices-1 indices use entry [indices-1] |
| 28 | * ... ... ... |
| 29 | * x:y y+1 use entry [y & (indices-1)] |
| 30 | * ... ... ... |
| 31 | * 0xffff 0x10000 use entry [indices-1] |
| 32 | */ |
| 33 | |
| 34 | |
| 35 | #define NO_DEFAULT_INDEX (1 << 16) |
| 36 | |
| 37 | struct dsmark_qdisc_data { |
| 38 | struct Qdisc *q; |
| 39 | struct tcf_proto *filter_list; |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 40 | u8 *mask; /* "owns" the array */ |
| 41 | u8 *value; |
| 42 | u16 indices; |
| 43 | u32 default_index; /* index range is 0...0xffff */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | int set_tc_index; |
| 45 | }; |
| 46 | |
Thomas Graf | 758cc43 | 2005-06-18 22:52:54 -0700 | [diff] [blame] | 47 | static inline int dsmark_valid_index(struct dsmark_qdisc_data *p, u16 index) |
| 48 | { |
| 49 | return (index <= p->indices && index > 0); |
| 50 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | |
| 52 | /* ------------------------- Class/flow operations ------------------------- */ |
| 53 | |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 54 | static int dsmark_graft(struct Qdisc *sch, unsigned long arg, |
| 55 | struct Qdisc *new, struct Qdisc **old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | { |
Stephen Hemminger | 81da99e | 2008-01-21 00:50:09 -0800 | [diff] [blame] | 57 | struct dsmark_qdisc_data *p = qdisc_priv(sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | |
Stephen Hemminger | 81da99e | 2008-01-21 00:50:09 -0800 | [diff] [blame] | 59 | pr_debug("dsmark_graft(sch %p,[qdisc %p],new %p,old %p)\n", |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 60 | sch, p, new, old); |
Thomas Graf | 486b53e | 2005-05-31 15:16:52 -0700 | [diff] [blame] | 61 | |
| 62 | if (new == NULL) { |
Patrick McHardy | 9f9afec | 2006-11-29 17:35:18 -0800 | [diff] [blame] | 63 | new = qdisc_create_dflt(sch->dev, &pfifo_qdisc_ops, |
| 64 | sch->handle); |
Thomas Graf | 486b53e | 2005-05-31 15:16:52 -0700 | [diff] [blame] | 65 | if (new == NULL) |
| 66 | new = &noop_qdisc; |
| 67 | } |
| 68 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | sch_tree_lock(sch); |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 70 | *old = xchg(&p->q, new); |
Patrick McHardy | 5e50da0 | 2006-11-29 17:36:20 -0800 | [diff] [blame] | 71 | qdisc_tree_decrease_qlen(*old, (*old)->q.qlen); |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 72 | qdisc_reset(*old); |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 73 | sch_tree_unlock(sch); |
| 74 | |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 75 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | } |
| 77 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | static struct Qdisc *dsmark_leaf(struct Qdisc *sch, unsigned long arg) |
| 79 | { |
Stephen Hemminger | 81da99e | 2008-01-21 00:50:09 -0800 | [diff] [blame] | 80 | struct dsmark_qdisc_data *p = qdisc_priv(sch); |
| 81 | return p->q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | } |
| 83 | |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 84 | static unsigned long dsmark_get(struct Qdisc *sch, u32 classid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | { |
Stephen Hemminger | 81da99e | 2008-01-21 00:50:09 -0800 | [diff] [blame] | 86 | pr_debug("dsmark_get(sch %p,[qdisc %p],classid %x)\n", |
| 87 | sch, qdisc_priv(sch), classid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 89 | return TC_H_MIN(classid) + 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | } |
| 91 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | static unsigned long dsmark_bind_filter(struct Qdisc *sch, |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 93 | unsigned long parent, u32 classid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | { |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 95 | return dsmark_get(sch, classid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | } |
| 97 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | static void dsmark_put(struct Qdisc *sch, unsigned long cl) |
| 99 | { |
| 100 | } |
| 101 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | static int dsmark_change(struct Qdisc *sch, u32 classid, u32 parent, |
Thomas Graf | 758cc43 | 2005-06-18 22:52:54 -0700 | [diff] [blame] | 103 | struct rtattr **tca, unsigned long *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | { |
Stephen Hemminger | 81da99e | 2008-01-21 00:50:09 -0800 | [diff] [blame] | 105 | struct dsmark_qdisc_data *p = qdisc_priv(sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | struct rtattr *opt = tca[TCA_OPTIONS-1]; |
| 107 | struct rtattr *tb[TCA_DSMARK_MAX]; |
Thomas Graf | 758cc43 | 2005-06-18 22:52:54 -0700 | [diff] [blame] | 108 | int err = -EINVAL; |
| 109 | u8 mask = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | |
Stephen Hemminger | 81da99e | 2008-01-21 00:50:09 -0800 | [diff] [blame] | 111 | pr_debug("dsmark_change(sch %p,[qdisc %p],classid %x,parent %x)," |
Thomas Graf | 758cc43 | 2005-06-18 22:52:54 -0700 | [diff] [blame] | 112 | "arg 0x%lx\n", sch, p, classid, parent, *arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | |
Thomas Graf | 758cc43 | 2005-06-18 22:52:54 -0700 | [diff] [blame] | 114 | if (!dsmark_valid_index(p, *arg)) { |
| 115 | err = -ENOENT; |
| 116 | goto rtattr_failure; |
| 117 | } |
| 118 | |
| 119 | if (!opt || rtattr_parse_nested(tb, TCA_DSMARK_MAX, opt)) |
| 120 | goto rtattr_failure; |
| 121 | |
| 122 | if (tb[TCA_DSMARK_MASK-1]) |
| 123 | mask = RTA_GET_U8(tb[TCA_DSMARK_MASK-1]); |
| 124 | |
| 125 | if (tb[TCA_DSMARK_VALUE-1]) |
| 126 | p->value[*arg-1] = RTA_GET_U8(tb[TCA_DSMARK_VALUE-1]); |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 127 | |
Thomas Graf | 758cc43 | 2005-06-18 22:52:54 -0700 | [diff] [blame] | 128 | if (tb[TCA_DSMARK_MASK-1]) |
| 129 | p->mask[*arg-1] = mask; |
| 130 | |
| 131 | err = 0; |
| 132 | |
| 133 | rtattr_failure: |
| 134 | return err; |
| 135 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 137 | static int dsmark_delete(struct Qdisc *sch, unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | { |
Stephen Hemminger | 81da99e | 2008-01-21 00:50:09 -0800 | [diff] [blame] | 139 | struct dsmark_qdisc_data *p = qdisc_priv(sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 141 | if (!dsmark_valid_index(p, arg)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | return -EINVAL; |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 143 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | p->mask[arg-1] = 0xff; |
| 145 | p->value[arg-1] = 0; |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 146 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | return 0; |
| 148 | } |
| 149 | |
Stephen Hemminger | 9d127fb | 2008-01-21 02:24:21 -0800 | [diff] [blame^] | 150 | static void dsmark_walk(struct Qdisc *sch, struct qdisc_walker *walker) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | { |
Stephen Hemminger | 81da99e | 2008-01-21 00:50:09 -0800 | [diff] [blame] | 152 | struct dsmark_qdisc_data *p = qdisc_priv(sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | int i; |
| 154 | |
Stephen Hemminger | 81da99e | 2008-01-21 00:50:09 -0800 | [diff] [blame] | 155 | pr_debug("dsmark_walk(sch %p,[qdisc %p],walker %p)\n", sch, p, walker); |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 156 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | if (walker->stop) |
| 158 | return; |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 159 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | for (i = 0; i < p->indices; i++) { |
| 161 | if (p->mask[i] == 0xff && !p->value[i]) |
Thomas Graf | 0451eb0 | 2005-05-31 15:15:58 -0700 | [diff] [blame] | 162 | goto ignore; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | if (walker->count >= walker->skip) { |
| 164 | if (walker->fn(sch, i+1, walker) < 0) { |
| 165 | walker->stop = 1; |
| 166 | break; |
| 167 | } |
| 168 | } |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 169 | ignore: |
Thomas Graf | 0451eb0 | 2005-05-31 15:15:58 -0700 | [diff] [blame] | 170 | walker->count++; |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 171 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | } |
| 173 | |
Stephen Hemminger | 9d127fb | 2008-01-21 02:24:21 -0800 | [diff] [blame^] | 174 | static inline struct tcf_proto **dsmark_find_tcf(struct Qdisc *sch, |
| 175 | unsigned long cl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | { |
Stephen Hemminger | 81da99e | 2008-01-21 00:50:09 -0800 | [diff] [blame] | 177 | struct dsmark_qdisc_data *p = qdisc_priv(sch); |
| 178 | return &p->filter_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | } |
| 180 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | /* --------------------------- Qdisc operations ---------------------------- */ |
| 182 | |
Stephen Hemminger | 9d127fb | 2008-01-21 02:24:21 -0800 | [diff] [blame^] | 183 | static int dsmark_enqueue(struct sk_buff *skb, struct Qdisc *sch) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | { |
Stephen Hemminger | 81da99e | 2008-01-21 00:50:09 -0800 | [diff] [blame] | 185 | struct dsmark_qdisc_data *p = qdisc_priv(sch); |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 186 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | |
Stephen Hemminger | 81da99e | 2008-01-21 00:50:09 -0800 | [diff] [blame] | 188 | pr_debug("dsmark_enqueue(skb %p,sch %p,[qdisc %p])\n", skb, sch, p); |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 189 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | if (p->set_tc_index) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | switch (skb->protocol) { |
Stephen Hemminger | 9d127fb | 2008-01-21 02:24:21 -0800 | [diff] [blame^] | 192 | case __constant_htons(ETH_P_IP): |
| 193 | if (skb_cow_head(skb, sizeof(struct iphdr))) |
| 194 | goto drop; |
Stephen Hemminger | 4c30719 | 2008-01-21 02:23:49 -0800 | [diff] [blame] | 195 | |
Stephen Hemminger | 9d127fb | 2008-01-21 02:24:21 -0800 | [diff] [blame^] | 196 | skb->tc_index = ipv4_get_dsfield(ip_hdr(skb)) |
| 197 | & ~INET_ECN_MASK; |
| 198 | break; |
Stephen Hemminger | 4c30719 | 2008-01-21 02:23:49 -0800 | [diff] [blame] | 199 | |
Stephen Hemminger | 9d127fb | 2008-01-21 02:24:21 -0800 | [diff] [blame^] | 200 | case __constant_htons(ETH_P_IPV6): |
| 201 | if (skb_cow_head(skb, sizeof(struct ipv6hdr))) |
| 202 | goto drop; |
Stephen Hemminger | 4c30719 | 2008-01-21 02:23:49 -0800 | [diff] [blame] | 203 | |
Stephen Hemminger | 9d127fb | 2008-01-21 02:24:21 -0800 | [diff] [blame^] | 204 | skb->tc_index = ipv6_get_dsfield(ipv6_hdr(skb)) |
| 205 | & ~INET_ECN_MASK; |
| 206 | break; |
| 207 | default: |
| 208 | skb->tc_index = 0; |
| 209 | break; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 210 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | } |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 212 | |
| 213 | if (TC_H_MAJ(skb->priority) == sch->handle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | skb->tc_index = TC_H_MIN(skb->priority); |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 215 | else { |
| 216 | struct tcf_result res; |
| 217 | int result = tc_classify(skb, p->filter_list, &res); |
| 218 | |
Stephen Hemminger | 81da99e | 2008-01-21 00:50:09 -0800 | [diff] [blame] | 219 | pr_debug("result %d class 0x%04x\n", result, res.classid); |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 220 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | switch (result) { |
Patrick McHardy | f6853e2 | 2007-07-15 00:02:10 -0700 | [diff] [blame] | 222 | #ifdef CONFIG_NET_CLS_ACT |
| 223 | case TC_ACT_QUEUED: |
| 224 | case TC_ACT_STOLEN: |
| 225 | kfree_skb(skb); |
| 226 | return NET_XMIT_SUCCESS; |
Stephen Hemminger | 4c30719 | 2008-01-21 02:23:49 -0800 | [diff] [blame] | 227 | |
Patrick McHardy | f6853e2 | 2007-07-15 00:02:10 -0700 | [diff] [blame] | 228 | case TC_ACT_SHOT: |
Stephen Hemminger | 4c30719 | 2008-01-21 02:23:49 -0800 | [diff] [blame] | 229 | goto drop; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | #endif |
Patrick McHardy | c3bc7cf | 2007-07-15 00:03:05 -0700 | [diff] [blame] | 231 | case TC_ACT_OK: |
Patrick McHardy | f6853e2 | 2007-07-15 00:02:10 -0700 | [diff] [blame] | 232 | skb->tc_index = TC_H_MIN(res.classid); |
| 233 | break; |
Stephen Hemminger | 4c30719 | 2008-01-21 02:23:49 -0800 | [diff] [blame] | 234 | |
Patrick McHardy | f6853e2 | 2007-07-15 00:02:10 -0700 | [diff] [blame] | 235 | default: |
| 236 | if (p->default_index != NO_DEFAULT_INDEX) |
| 237 | skb->tc_index = p->default_index; |
| 238 | break; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 239 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | |
Stephen Hemminger | 9d127fb | 2008-01-21 02:24:21 -0800 | [diff] [blame^] | 242 | err = p->q->enqueue(skb, p->q); |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 243 | if (err != NET_XMIT_SUCCESS) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | sch->qstats.drops++; |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 245 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | } |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 247 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | sch->bstats.bytes += skb->len; |
| 249 | sch->bstats.packets++; |
| 250 | sch->q.qlen++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 252 | return NET_XMIT_SUCCESS; |
Stephen Hemminger | 4c30719 | 2008-01-21 02:23:49 -0800 | [diff] [blame] | 253 | |
| 254 | drop: |
| 255 | kfree_skb(skb); |
| 256 | sch->qstats.drops++; |
| 257 | return NET_XMIT_BYPASS; |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 258 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | |
| 260 | static struct sk_buff *dsmark_dequeue(struct Qdisc *sch) |
| 261 | { |
Stephen Hemminger | 81da99e | 2008-01-21 00:50:09 -0800 | [diff] [blame] | 262 | struct dsmark_qdisc_data *p = qdisc_priv(sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | struct sk_buff *skb; |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 264 | u32 index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | |
Stephen Hemminger | 81da99e | 2008-01-21 00:50:09 -0800 | [diff] [blame] | 266 | pr_debug("dsmark_dequeue(sch %p,[qdisc %p])\n", sch, p); |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 267 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | skb = p->q->ops->dequeue(p->q); |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 269 | if (skb == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | return NULL; |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 271 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | sch->q.qlen--; |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 273 | |
| 274 | index = skb->tc_index & (p->indices - 1); |
Stephen Hemminger | 81da99e | 2008-01-21 00:50:09 -0800 | [diff] [blame] | 275 | pr_debug("index %d->%d\n", skb->tc_index, index); |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 276 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | switch (skb->protocol) { |
Stephen Hemminger | 9d127fb | 2008-01-21 02:24:21 -0800 | [diff] [blame^] | 278 | case __constant_htons(ETH_P_IP): |
| 279 | ipv4_change_dsfield(ip_hdr(skb), p->mask[index], |
| 280 | p->value[index]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | break; |
Stephen Hemminger | 9d127fb | 2008-01-21 02:24:21 -0800 | [diff] [blame^] | 282 | case __constant_htons(ETH_P_IPV6): |
| 283 | ipv6_change_dsfield(ipv6_hdr(skb), p->mask[index], |
| 284 | p->value[index]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | break; |
Stephen Hemminger | 9d127fb | 2008-01-21 02:24:21 -0800 | [diff] [blame^] | 286 | default: |
| 287 | /* |
| 288 | * Only complain if a change was actually attempted. |
| 289 | * This way, we can send non-IP traffic through dsmark |
| 290 | * and don't need yet another qdisc as a bypass. |
| 291 | */ |
| 292 | if (p->mask[index] != 0xff || p->value[index]) |
| 293 | printk(KERN_WARNING |
| 294 | "dsmark_dequeue: unsupported protocol %d\n", |
| 295 | ntohs(skb->protocol)); |
| 296 | break; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 297 | } |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 298 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | return skb; |
| 300 | } |
| 301 | |
Stephen Hemminger | 9d127fb | 2008-01-21 02:24:21 -0800 | [diff] [blame^] | 302 | static int dsmark_requeue(struct sk_buff *skb, struct Qdisc *sch) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | { |
Stephen Hemminger | 81da99e | 2008-01-21 00:50:09 -0800 | [diff] [blame] | 304 | struct dsmark_qdisc_data *p = qdisc_priv(sch); |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 305 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | |
Stephen Hemminger | 81da99e | 2008-01-21 00:50:09 -0800 | [diff] [blame] | 307 | pr_debug("dsmark_requeue(skb %p,sch %p,[qdisc %p])\n", skb, sch, p); |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 308 | |
| 309 | err = p->q->ops->requeue(skb, p->q); |
| 310 | if (err != NET_XMIT_SUCCESS) { |
| 311 | sch->qstats.drops++; |
| 312 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 315 | sch->q.qlen++; |
| 316 | sch->qstats.requeues++; |
| 317 | |
| 318 | return NET_XMIT_SUCCESS; |
| 319 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | |
| 321 | static unsigned int dsmark_drop(struct Qdisc *sch) |
| 322 | { |
Stephen Hemminger | 81da99e | 2008-01-21 00:50:09 -0800 | [diff] [blame] | 323 | struct dsmark_qdisc_data *p = qdisc_priv(sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | unsigned int len; |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 325 | |
Stephen Hemminger | 81da99e | 2008-01-21 00:50:09 -0800 | [diff] [blame] | 326 | pr_debug("dsmark_reset(sch %p,[qdisc %p])\n", sch, p); |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 327 | |
| 328 | if (p->q->ops->drop == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | return 0; |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 330 | |
| 331 | len = p->q->ops->drop(p->q); |
| 332 | if (len) |
| 333 | sch->q.qlen--; |
| 334 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | return len; |
| 336 | } |
| 337 | |
Thomas Graf | 758cc43 | 2005-06-18 22:52:54 -0700 | [diff] [blame] | 338 | static int dsmark_init(struct Qdisc *sch, struct rtattr *opt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | { |
Stephen Hemminger | 81da99e | 2008-01-21 00:50:09 -0800 | [diff] [blame] | 340 | struct dsmark_qdisc_data *p = qdisc_priv(sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | struct rtattr *tb[TCA_DSMARK_MAX]; |
Thomas Graf | 758cc43 | 2005-06-18 22:52:54 -0700 | [diff] [blame] | 342 | int err = -EINVAL; |
| 343 | u32 default_index = NO_DEFAULT_INDEX; |
| 344 | u16 indices; |
| 345 | u8 *mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | |
Stephen Hemminger | 81da99e | 2008-01-21 00:50:09 -0800 | [diff] [blame] | 347 | pr_debug("dsmark_init(sch %p,[qdisc %p],opt %p)\n", sch, p, opt); |
Thomas Graf | 758cc43 | 2005-06-18 22:52:54 -0700 | [diff] [blame] | 348 | |
| 349 | if (!opt || rtattr_parse_nested(tb, TCA_DSMARK_MAX, opt) < 0) |
| 350 | goto errout; |
| 351 | |
| 352 | indices = RTA_GET_U16(tb[TCA_DSMARK_INDICES-1]); |
David S. Miller | 5b0ac72 | 2008-01-21 02:21:45 -0800 | [diff] [blame] | 353 | |
| 354 | if (hweight32(indices) != 1) |
Thomas Graf | 758cc43 | 2005-06-18 22:52:54 -0700 | [diff] [blame] | 355 | goto errout; |
| 356 | |
| 357 | if (tb[TCA_DSMARK_DEFAULT_INDEX-1]) |
| 358 | default_index = RTA_GET_U16(tb[TCA_DSMARK_DEFAULT_INDEX-1]); |
| 359 | |
| 360 | mask = kmalloc(indices * 2, GFP_KERNEL); |
| 361 | if (mask == NULL) { |
| 362 | err = -ENOMEM; |
| 363 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | } |
Thomas Graf | 758cc43 | 2005-06-18 22:52:54 -0700 | [diff] [blame] | 365 | |
| 366 | p->mask = mask; |
| 367 | memset(p->mask, 0xff, indices); |
| 368 | |
| 369 | p->value = p->mask + indices; |
| 370 | memset(p->value, 0, indices); |
| 371 | |
| 372 | p->indices = indices; |
| 373 | p->default_index = default_index; |
| 374 | p->set_tc_index = RTA_GET_FLAG(tb[TCA_DSMARK_SET_TC_INDEX-1]); |
| 375 | |
Patrick McHardy | 9f9afec | 2006-11-29 17:35:18 -0800 | [diff] [blame] | 376 | p->q = qdisc_create_dflt(sch->dev, &pfifo_qdisc_ops, sch->handle); |
Thomas Graf | 758cc43 | 2005-06-18 22:52:54 -0700 | [diff] [blame] | 377 | if (p->q == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | p->q = &noop_qdisc; |
Thomas Graf | 758cc43 | 2005-06-18 22:52:54 -0700 | [diff] [blame] | 379 | |
Stephen Hemminger | 81da99e | 2008-01-21 00:50:09 -0800 | [diff] [blame] | 380 | pr_debug("dsmark_init: qdisc %p\n", p->q); |
Thomas Graf | 758cc43 | 2005-06-18 22:52:54 -0700 | [diff] [blame] | 381 | |
| 382 | err = 0; |
| 383 | errout: |
| 384 | rtattr_failure: |
| 385 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | } |
| 387 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | static void dsmark_reset(struct Qdisc *sch) |
| 389 | { |
Stephen Hemminger | 81da99e | 2008-01-21 00:50:09 -0800 | [diff] [blame] | 390 | struct dsmark_qdisc_data *p = qdisc_priv(sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | |
Stephen Hemminger | 81da99e | 2008-01-21 00:50:09 -0800 | [diff] [blame] | 392 | pr_debug("dsmark_reset(sch %p,[qdisc %p])\n", sch, p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | qdisc_reset(p->q); |
| 394 | sch->q.qlen = 0; |
| 395 | } |
| 396 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | static void dsmark_destroy(struct Qdisc *sch) |
| 398 | { |
Stephen Hemminger | 81da99e | 2008-01-21 00:50:09 -0800 | [diff] [blame] | 399 | struct dsmark_qdisc_data *p = qdisc_priv(sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | |
Stephen Hemminger | 81da99e | 2008-01-21 00:50:09 -0800 | [diff] [blame] | 401 | pr_debug("dsmark_destroy(sch %p,[qdisc %p])\n", sch, p); |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 402 | |
Patrick McHardy | a48b5a6 | 2007-03-23 11:29:43 -0700 | [diff] [blame] | 403 | tcf_destroy_chain(p->filter_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | qdisc_destroy(p->q); |
| 405 | kfree(p->mask); |
| 406 | } |
| 407 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | static int dsmark_dump_class(struct Qdisc *sch, unsigned long cl, |
Thomas Graf | 02f23f0 | 2005-06-18 22:53:12 -0700 | [diff] [blame] | 409 | struct sk_buff *skb, struct tcmsg *tcm) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | { |
Stephen Hemminger | 81da99e | 2008-01-21 00:50:09 -0800 | [diff] [blame] | 411 | struct dsmark_qdisc_data *p = qdisc_priv(sch); |
Thomas Graf | 02f23f0 | 2005-06-18 22:53:12 -0700 | [diff] [blame] | 412 | struct rtattr *opts = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | |
Stephen Hemminger | 81da99e | 2008-01-21 00:50:09 -0800 | [diff] [blame] | 414 | pr_debug("dsmark_dump_class(sch %p,[qdisc %p],class %ld\n", sch, p, cl); |
Thomas Graf | 02f23f0 | 2005-06-18 22:53:12 -0700 | [diff] [blame] | 415 | |
| 416 | if (!dsmark_valid_index(p, cl)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | return -EINVAL; |
Thomas Graf | 02f23f0 | 2005-06-18 22:53:12 -0700 | [diff] [blame] | 418 | |
| 419 | 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] | 420 | tcm->tcm_info = p->q->handle; |
Thomas Graf | 02f23f0 | 2005-06-18 22:53:12 -0700 | [diff] [blame] | 421 | |
| 422 | opts = RTA_NEST(skb, TCA_OPTIONS); |
Stephen Hemminger | 9d127fb | 2008-01-21 02:24:21 -0800 | [diff] [blame^] | 423 | RTA_PUT_U8(skb, TCA_DSMARK_MASK, p->mask[cl-1]); |
| 424 | RTA_PUT_U8(skb, TCA_DSMARK_VALUE, p->value[cl-1]); |
Thomas Graf | 02f23f0 | 2005-06-18 22:53:12 -0700 | [diff] [blame] | 425 | |
| 426 | return RTA_NEST_END(skb, opts); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | |
| 428 | rtattr_failure: |
Thomas Graf | 02f23f0 | 2005-06-18 22:53:12 -0700 | [diff] [blame] | 429 | return RTA_NEST_CANCEL(skb, opts); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | } |
| 431 | |
| 432 | static int dsmark_dump(struct Qdisc *sch, struct sk_buff *skb) |
| 433 | { |
Stephen Hemminger | 81da99e | 2008-01-21 00:50:09 -0800 | [diff] [blame] | 434 | struct dsmark_qdisc_data *p = qdisc_priv(sch); |
Thomas Graf | 02f23f0 | 2005-06-18 22:53:12 -0700 | [diff] [blame] | 435 | struct rtattr *opts = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | |
Thomas Graf | 02f23f0 | 2005-06-18 22:53:12 -0700 | [diff] [blame] | 437 | opts = RTA_NEST(skb, TCA_OPTIONS); |
| 438 | RTA_PUT_U16(skb, TCA_DSMARK_INDICES, p->indices); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | |
Thomas Graf | 02f23f0 | 2005-06-18 22:53:12 -0700 | [diff] [blame] | 440 | if (p->default_index != NO_DEFAULT_INDEX) |
| 441 | RTA_PUT_U16(skb, TCA_DSMARK_DEFAULT_INDEX, p->default_index); |
| 442 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | if (p->set_tc_index) |
Thomas Graf | 02f23f0 | 2005-06-18 22:53:12 -0700 | [diff] [blame] | 444 | RTA_PUT_FLAG(skb, TCA_DSMARK_SET_TC_INDEX); |
| 445 | |
| 446 | return RTA_NEST_END(skb, opts); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | |
| 448 | rtattr_failure: |
Thomas Graf | 02f23f0 | 2005-06-18 22:53:12 -0700 | [diff] [blame] | 449 | return RTA_NEST_CANCEL(skb, opts); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | } |
| 451 | |
Eric Dumazet | 20fea08 | 2007-11-14 01:44:41 -0800 | [diff] [blame] | 452 | static const struct Qdisc_class_ops dsmark_class_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | .graft = dsmark_graft, |
| 454 | .leaf = dsmark_leaf, |
| 455 | .get = dsmark_get, |
| 456 | .put = dsmark_put, |
| 457 | .change = dsmark_change, |
| 458 | .delete = dsmark_delete, |
| 459 | .walk = dsmark_walk, |
| 460 | .tcf_chain = dsmark_find_tcf, |
| 461 | .bind_tcf = dsmark_bind_filter, |
| 462 | .unbind_tcf = dsmark_put, |
| 463 | .dump = dsmark_dump_class, |
| 464 | }; |
| 465 | |
Eric Dumazet | 20fea08 | 2007-11-14 01:44:41 -0800 | [diff] [blame] | 466 | static struct Qdisc_ops dsmark_qdisc_ops __read_mostly = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | .next = NULL, |
| 468 | .cl_ops = &dsmark_class_ops, |
| 469 | .id = "dsmark", |
| 470 | .priv_size = sizeof(struct dsmark_qdisc_data), |
| 471 | .enqueue = dsmark_enqueue, |
| 472 | .dequeue = dsmark_dequeue, |
| 473 | .requeue = dsmark_requeue, |
| 474 | .drop = dsmark_drop, |
| 475 | .init = dsmark_init, |
| 476 | .reset = dsmark_reset, |
| 477 | .destroy = dsmark_destroy, |
| 478 | .change = NULL, |
| 479 | .dump = dsmark_dump, |
| 480 | .owner = THIS_MODULE, |
| 481 | }; |
| 482 | |
| 483 | static int __init dsmark_module_init(void) |
| 484 | { |
| 485 | return register_qdisc(&dsmark_qdisc_ops); |
| 486 | } |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 487 | |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 488 | static void __exit dsmark_module_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | { |
| 490 | unregister_qdisc(&dsmark_qdisc_ops); |
| 491 | } |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 492 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | module_init(dsmark_module_init) |
| 494 | module_exit(dsmark_module_exit) |
Thomas Graf | af0d114 | 2005-06-18 22:53:29 -0700 | [diff] [blame] | 495 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | MODULE_LICENSE("GPL"); |