Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * net/sched/cls_u32.c Ugly (or Universal) 32bit key Packet Classifier. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * as published by the Free Software Foundation; either version |
| 7 | * 2 of the License, or (at your option) any later version. |
| 8 | * |
| 9 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> |
| 10 | * |
| 11 | * The filters are packed to hash tables of key nodes |
| 12 | * with a set of 32bit key/mask pairs at every node. |
| 13 | * Nodes reference next level hash tables etc. |
| 14 | * |
| 15 | * This scheme is the best universal classifier I managed to |
| 16 | * invent; it is not super-fast, but it is not slow (provided you |
| 17 | * program it correctly), and general enough. And its relative |
| 18 | * speed grows as the number of rules becomes larger. |
| 19 | * |
| 20 | * It seems that it represents the best middle point between |
| 21 | * speed and manageability both by human and by machine. |
| 22 | * |
| 23 | * It is especially useful for link sharing combined with QoS; |
| 24 | * pure RSVP doesn't need such a general approach and can use |
| 25 | * much simpler (and faster) schemes, sort of cls_rsvp.c. |
| 26 | * |
| 27 | * JHS: We should remove the CONFIG_NET_CLS_IND from here |
| 28 | * eventually when the meta match extension is made available |
| 29 | * |
| 30 | * nfmark match added by Catalin(ux aka Dino) BOIE <catab at umbrella.ro> |
| 31 | */ |
| 32 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <linux/module.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 34 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <linux/types.h> |
| 36 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include <linux/string.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include <linux/errno.h> |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 39 | #include <linux/percpu.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #include <linux/rtnetlink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #include <linux/skbuff.h> |
Cong Wang | 7801db8 | 2014-07-17 17:34:53 -0700 | [diff] [blame] | 42 | #include <linux/bitmap.h> |
Patrick McHardy | 0ba4805 | 2007-07-02 22:49:07 -0700 | [diff] [blame] | 43 | #include <net/netlink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #include <net/act_api.h> |
| 45 | #include <net/pkt_cls.h> |
John Fastabend | a1b7c5f | 2016-02-16 21:17:09 -0800 | [diff] [blame] | 46 | #include <linux/netdevice.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 48 | struct tc_u_knode { |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 49 | struct tc_u_knode __rcu *next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | u32 handle; |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 51 | struct tc_u_hnode __rcu *ht_up; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | struct tcf_exts exts; |
| 53 | #ifdef CONFIG_NET_CLS_IND |
WANG Cong | 2519a60 | 2014-01-09 16:14:02 -0800 | [diff] [blame] | 54 | int ifindex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | #endif |
| 56 | u8 fshift; |
| 57 | struct tcf_result res; |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 58 | struct tc_u_hnode __rcu *ht_down; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | #ifdef CONFIG_CLS_U32_PERF |
John Fastabend | 459d5f6 | 2014-09-12 20:08:47 -0700 | [diff] [blame] | 60 | struct tc_u32_pcnt __percpu *pf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | #endif |
John Fastabend | 9e8ce79 | 2016-02-26 07:54:39 -0800 | [diff] [blame] | 62 | u32 flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | #ifdef CONFIG_CLS_U32_MARK |
John Fastabend | 459d5f6 | 2014-09-12 20:08:47 -0700 | [diff] [blame] | 64 | u32 val; |
| 65 | u32 mask; |
| 66 | u32 __percpu *pcpu_success; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | #endif |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 68 | struct tcf_proto *tp; |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 69 | struct rcu_head rcu; |
John Fastabend | 4e2840e | 2014-09-17 11:11:46 -0700 | [diff] [blame] | 70 | /* The 'sel' field MUST be the last field in structure to allow for |
| 71 | * tc_u32_keys allocated at end of structure. |
| 72 | */ |
| 73 | struct tc_u32_sel sel; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | }; |
| 75 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 76 | struct tc_u_hnode { |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 77 | struct tc_u_hnode __rcu *next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | u32 handle; |
| 79 | u32 prio; |
| 80 | struct tc_u_common *tp_c; |
| 81 | int refcnt; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 82 | unsigned int divisor; |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 83 | struct rcu_head rcu; |
WANG Cong | 5778d39 | 2015-03-09 17:03:40 -0700 | [diff] [blame] | 84 | /* The 'ht' field MUST be the last field in structure to allow for |
| 85 | * more entries allocated at end of structure. |
| 86 | */ |
| 87 | struct tc_u_knode __rcu *ht[1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | }; |
| 89 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 90 | struct tc_u_common { |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 91 | struct tc_u_hnode __rcu *hlist; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | struct Qdisc *q; |
| 93 | int refcnt; |
| 94 | u32 hgenerator; |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 95 | struct rcu_head rcu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | }; |
| 97 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 98 | static inline unsigned int u32_hash_fold(__be32 key, |
| 99 | const struct tc_u32_sel *sel, |
| 100 | u8 fshift) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 102 | unsigned int h = ntohl(key & sel->hmask) >> fshift; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | |
| 104 | return h; |
| 105 | } |
| 106 | |
Jamal Hadi Salim | 5a7a555 | 2016-09-18 08:45:33 -0400 | [diff] [blame] | 107 | static int u32_classify(struct sk_buff *skb, const struct tcf_proto *tp, |
| 108 | struct tcf_result *res) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | { |
| 110 | struct { |
| 111 | struct tc_u_knode *knode; |
Changli Gao | fbc2e7d | 2010-06-02 07:32:42 -0700 | [diff] [blame] | 112 | unsigned int off; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | } stack[TC_U32_MAXDEPTH]; |
| 114 | |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 115 | struct tc_u_hnode *ht = rcu_dereference_bh(tp->root); |
Changli Gao | fbc2e7d | 2010-06-02 07:32:42 -0700 | [diff] [blame] | 116 | unsigned int off = skb_network_offset(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | struct tc_u_knode *n; |
| 118 | int sdepth = 0; |
| 119 | int off2 = 0; |
| 120 | int sel = 0; |
| 121 | #ifdef CONFIG_CLS_U32_PERF |
| 122 | int j; |
| 123 | #endif |
| 124 | int i, r; |
| 125 | |
| 126 | next_ht: |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 127 | n = rcu_dereference_bh(ht->ht[sel]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | |
| 129 | next_knode: |
| 130 | if (n) { |
| 131 | struct tc_u32_key *key = n->sel.keys; |
| 132 | |
| 133 | #ifdef CONFIG_CLS_U32_PERF |
John Fastabend | 459d5f6 | 2014-09-12 20:08:47 -0700 | [diff] [blame] | 134 | __this_cpu_inc(n->pf->rcnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | j = 0; |
| 136 | #endif |
| 137 | |
Samudrala, Sridhar | d34e3e1 | 2016-05-12 17:08:23 -0700 | [diff] [blame] | 138 | if (tc_skip_sw(n->flags)) { |
| 139 | n = rcu_dereference_bh(n->next); |
| 140 | goto next_knode; |
| 141 | } |
| 142 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | #ifdef CONFIG_CLS_U32_MARK |
John Fastabend | 459d5f6 | 2014-09-12 20:08:47 -0700 | [diff] [blame] | 144 | if ((skb->mark & n->mask) != n->val) { |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 145 | n = rcu_dereference_bh(n->next); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | goto next_knode; |
| 147 | } else { |
John Fastabend | 459d5f6 | 2014-09-12 20:08:47 -0700 | [diff] [blame] | 148 | __this_cpu_inc(*n->pcpu_success); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | } |
| 150 | #endif |
| 151 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 152 | for (i = n->sel.nkeys; i > 0; i--, key++) { |
stephen hemminger | 66d50d2 | 2010-08-02 13:44:13 +0000 | [diff] [blame] | 153 | int toff = off + key->off + (off2 & key->offmask); |
stephen hemminger | 86fce3b | 2011-02-20 16:14:23 +0000 | [diff] [blame] | 154 | __be32 *data, hdata; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | |
Dan Carpenter | 4e18b3e | 2010-10-04 02:28:36 +0000 | [diff] [blame] | 156 | if (skb_headroom(skb) + toff > INT_MAX) |
stephen hemminger | 66d50d2 | 2010-08-02 13:44:13 +0000 | [diff] [blame] | 157 | goto out; |
| 158 | |
stephen hemminger | 86fce3b | 2011-02-20 16:14:23 +0000 | [diff] [blame] | 159 | data = skb_header_pointer(skb, toff, 4, &hdata); |
Changli Gao | fbc2e7d | 2010-06-02 07:32:42 -0700 | [diff] [blame] | 160 | if (!data) |
| 161 | goto out; |
| 162 | if ((*data ^ key->val) & key->mask) { |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 163 | n = rcu_dereference_bh(n->next); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | goto next_knode; |
| 165 | } |
| 166 | #ifdef CONFIG_CLS_U32_PERF |
John Fastabend | 459d5f6 | 2014-09-12 20:08:47 -0700 | [diff] [blame] | 167 | __this_cpu_inc(n->pf->kcnts[j]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | j++; |
| 169 | #endif |
| 170 | } |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 171 | |
| 172 | ht = rcu_dereference_bh(n->ht_down); |
| 173 | if (!ht) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | check_terminal: |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 175 | if (n->sel.flags & TC_U32_TERMINAL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | |
| 177 | *res = n->res; |
| 178 | #ifdef CONFIG_NET_CLS_IND |
WANG Cong | 2519a60 | 2014-01-09 16:14:02 -0800 | [diff] [blame] | 179 | if (!tcf_match_indev(skb, n->ifindex)) { |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 180 | n = rcu_dereference_bh(n->next); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | goto next_knode; |
| 182 | } |
| 183 | #endif |
| 184 | #ifdef CONFIG_CLS_U32_PERF |
John Fastabend | 459d5f6 | 2014-09-12 20:08:47 -0700 | [diff] [blame] | 185 | __this_cpu_inc(n->pf->rhit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | #endif |
| 187 | r = tcf_exts_exec(skb, &n->exts, res); |
| 188 | if (r < 0) { |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 189 | n = rcu_dereference_bh(n->next); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | goto next_knode; |
| 191 | } |
| 192 | |
| 193 | return r; |
| 194 | } |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 195 | n = rcu_dereference_bh(n->next); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | goto next_knode; |
| 197 | } |
| 198 | |
| 199 | /* PUSH */ |
| 200 | if (sdepth >= TC_U32_MAXDEPTH) |
| 201 | goto deadloop; |
| 202 | stack[sdepth].knode = n; |
Changli Gao | fbc2e7d | 2010-06-02 07:32:42 -0700 | [diff] [blame] | 203 | stack[sdepth].off = off; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | sdepth++; |
| 205 | |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 206 | ht = rcu_dereference_bh(n->ht_down); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | sel = 0; |
Changli Gao | fbc2e7d | 2010-06-02 07:32:42 -0700 | [diff] [blame] | 208 | if (ht->divisor) { |
stephen hemminger | 86fce3b | 2011-02-20 16:14:23 +0000 | [diff] [blame] | 209 | __be32 *data, hdata; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | |
Changli Gao | fbc2e7d | 2010-06-02 07:32:42 -0700 | [diff] [blame] | 211 | data = skb_header_pointer(skb, off + n->sel.hoff, 4, |
stephen hemminger | 86fce3b | 2011-02-20 16:14:23 +0000 | [diff] [blame] | 212 | &hdata); |
Changli Gao | fbc2e7d | 2010-06-02 07:32:42 -0700 | [diff] [blame] | 213 | if (!data) |
| 214 | goto out; |
| 215 | sel = ht->divisor & u32_hash_fold(*data, &n->sel, |
| 216 | n->fshift); |
| 217 | } |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 218 | if (!(n->sel.flags & (TC_U32_VAROFFSET | TC_U32_OFFSET | TC_U32_EAT))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | goto next_ht; |
| 220 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 221 | if (n->sel.flags & (TC_U32_OFFSET | TC_U32_VAROFFSET)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | off2 = n->sel.off + 3; |
Changli Gao | fbc2e7d | 2010-06-02 07:32:42 -0700 | [diff] [blame] | 223 | if (n->sel.flags & TC_U32_VAROFFSET) { |
stephen hemminger | 86fce3b | 2011-02-20 16:14:23 +0000 | [diff] [blame] | 224 | __be16 *data, hdata; |
Changli Gao | fbc2e7d | 2010-06-02 07:32:42 -0700 | [diff] [blame] | 225 | |
| 226 | data = skb_header_pointer(skb, |
| 227 | off + n->sel.offoff, |
stephen hemminger | 86fce3b | 2011-02-20 16:14:23 +0000 | [diff] [blame] | 228 | 2, &hdata); |
Changli Gao | fbc2e7d | 2010-06-02 07:32:42 -0700 | [diff] [blame] | 229 | if (!data) |
| 230 | goto out; |
| 231 | off2 += ntohs(n->sel.offmask & *data) >> |
| 232 | n->sel.offshift; |
| 233 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | off2 &= ~3; |
| 235 | } |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 236 | if (n->sel.flags & TC_U32_EAT) { |
Changli Gao | fbc2e7d | 2010-06-02 07:32:42 -0700 | [diff] [blame] | 237 | off += off2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | off2 = 0; |
| 239 | } |
| 240 | |
Changli Gao | fbc2e7d | 2010-06-02 07:32:42 -0700 | [diff] [blame] | 241 | if (off < skb->len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | goto next_ht; |
| 243 | } |
| 244 | |
| 245 | /* POP */ |
| 246 | if (sdepth--) { |
| 247 | n = stack[sdepth].knode; |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 248 | ht = rcu_dereference_bh(n->ht_up); |
Changli Gao | fbc2e7d | 2010-06-02 07:32:42 -0700 | [diff] [blame] | 249 | off = stack[sdepth].off; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | goto check_terminal; |
| 251 | } |
Changli Gao | fbc2e7d | 2010-06-02 07:32:42 -0700 | [diff] [blame] | 252 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | return -1; |
| 254 | |
| 255 | deadloop: |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 256 | net_warn_ratelimited("cls_u32: dead loop\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | return -1; |
| 258 | } |
| 259 | |
Jamal Hadi Salim | 5a7a555 | 2016-09-18 08:45:33 -0400 | [diff] [blame] | 260 | static struct tc_u_hnode *u32_lookup_ht(struct tc_u_common *tp_c, u32 handle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | { |
| 262 | struct tc_u_hnode *ht; |
| 263 | |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 264 | for (ht = rtnl_dereference(tp_c->hlist); |
| 265 | ht; |
| 266 | ht = rtnl_dereference(ht->next)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | if (ht->handle == handle) |
| 268 | break; |
| 269 | |
| 270 | return ht; |
| 271 | } |
| 272 | |
Jamal Hadi Salim | 5a7a555 | 2016-09-18 08:45:33 -0400 | [diff] [blame] | 273 | static struct tc_u_knode *u32_lookup_key(struct tc_u_hnode *ht, u32 handle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 275 | unsigned int sel; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | struct tc_u_knode *n = NULL; |
| 277 | |
| 278 | sel = TC_U32_HASH(handle); |
| 279 | if (sel > ht->divisor) |
| 280 | goto out; |
| 281 | |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 282 | for (n = rtnl_dereference(ht->ht[sel]); |
| 283 | n; |
| 284 | n = rtnl_dereference(n->next)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | if (n->handle == handle) |
| 286 | break; |
| 287 | out: |
| 288 | return n; |
| 289 | } |
| 290 | |
| 291 | |
| 292 | static unsigned long u32_get(struct tcf_proto *tp, u32 handle) |
| 293 | { |
| 294 | struct tc_u_hnode *ht; |
| 295 | struct tc_u_common *tp_c = tp->data; |
| 296 | |
| 297 | if (TC_U32_HTID(handle) == TC_U32_ROOT) |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 298 | ht = rtnl_dereference(tp->root); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | else |
| 300 | ht = u32_lookup_ht(tp_c, TC_U32_HTID(handle)); |
| 301 | |
| 302 | if (!ht) |
| 303 | return 0; |
| 304 | |
| 305 | if (TC_U32_KEY(handle) == 0) |
| 306 | return (unsigned long)ht; |
| 307 | |
| 308 | return (unsigned long)u32_lookup_key(ht, handle); |
| 309 | } |
| 310 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | static u32 gen_new_htid(struct tc_u_common *tp_c) |
| 312 | { |
| 313 | int i = 0x800; |
| 314 | |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 315 | /* hgenerator only used inside rtnl lock it is safe to increment |
| 316 | * without read _copy_ update semantics |
| 317 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | do { |
| 319 | if (++tp_c->hgenerator == 0x7FF) |
| 320 | tp_c->hgenerator = 1; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 321 | } while (--i > 0 && u32_lookup_ht(tp_c, (tp_c->hgenerator|0x800)<<20)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | |
| 323 | return i > 0 ? (tp_c->hgenerator|0x800)<<20 : 0; |
| 324 | } |
| 325 | |
| 326 | static int u32_init(struct tcf_proto *tp) |
| 327 | { |
| 328 | struct tc_u_hnode *root_ht; |
| 329 | struct tc_u_common *tp_c; |
| 330 | |
David S. Miller | 72b25a9 | 2008-07-18 20:54:17 -0700 | [diff] [blame] | 331 | tp_c = tp->q->u32_node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 333 | root_ht = kzalloc(sizeof(*root_ht), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | if (root_ht == NULL) |
| 335 | return -ENOBUFS; |
| 336 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | root_ht->divisor = 0; |
| 338 | root_ht->refcnt++; |
| 339 | root_ht->handle = tp_c ? gen_new_htid(tp_c) : 0x80000000; |
| 340 | root_ht->prio = tp->prio; |
| 341 | |
| 342 | if (tp_c == NULL) { |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 343 | tp_c = kzalloc(sizeof(*tp_c), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | if (tp_c == NULL) { |
| 345 | kfree(root_ht); |
| 346 | return -ENOBUFS; |
| 347 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | tp_c->q = tp->q; |
David S. Miller | 72b25a9 | 2008-07-18 20:54:17 -0700 | [diff] [blame] | 349 | tp->q->u32_node = tp_c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | } |
| 351 | |
| 352 | tp_c->refcnt++; |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 353 | RCU_INIT_POINTER(root_ht->next, tp_c->hlist); |
| 354 | rcu_assign_pointer(tp_c->hlist, root_ht); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | root_ht->tp_c = tp_c; |
| 356 | |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 357 | rcu_assign_pointer(tp->root, root_ht); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | tp->data = tp_c; |
| 359 | return 0; |
| 360 | } |
| 361 | |
Jamal Hadi Salim | 5a7a555 | 2016-09-18 08:45:33 -0400 | [diff] [blame] | 362 | static int u32_destroy_key(struct tcf_proto *tp, struct tc_u_knode *n, |
John Fastabend | de5df63 | 2014-09-19 21:50:34 -0700 | [diff] [blame] | 363 | bool free_pf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | { |
WANG Cong | 18d0264 | 2014-09-25 10:26:37 -0700 | [diff] [blame] | 365 | tcf_exts_destroy(&n->exts); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | if (n->ht_down) |
| 367 | n->ht_down->refcnt--; |
| 368 | #ifdef CONFIG_CLS_U32_PERF |
John Fastabend | de5df63 | 2014-09-19 21:50:34 -0700 | [diff] [blame] | 369 | if (free_pf) |
| 370 | free_percpu(n->pf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | #endif |
John Fastabend | a1ddcfe | 2014-09-19 21:50:04 -0700 | [diff] [blame] | 372 | #ifdef CONFIG_CLS_U32_MARK |
John Fastabend | de5df63 | 2014-09-19 21:50:34 -0700 | [diff] [blame] | 373 | if (free_pf) |
| 374 | free_percpu(n->pcpu_success); |
John Fastabend | a1ddcfe | 2014-09-19 21:50:04 -0700 | [diff] [blame] | 375 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | kfree(n); |
| 377 | return 0; |
| 378 | } |
| 379 | |
John Fastabend | de5df63 | 2014-09-19 21:50:34 -0700 | [diff] [blame] | 380 | /* u32_delete_key_rcu should be called when free'ing a copied |
| 381 | * version of a tc_u_knode obtained from u32_init_knode(). When |
| 382 | * copies are obtained from u32_init_knode() the statistics are |
| 383 | * shared between the old and new copies to allow readers to |
| 384 | * continue to update the statistics during the copy. To support |
| 385 | * this the u32_delete_key_rcu variant does not free the percpu |
| 386 | * statistics. |
| 387 | */ |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 388 | static void u32_delete_key_rcu(struct rcu_head *rcu) |
| 389 | { |
| 390 | struct tc_u_knode *key = container_of(rcu, struct tc_u_knode, rcu); |
| 391 | |
John Fastabend | de5df63 | 2014-09-19 21:50:34 -0700 | [diff] [blame] | 392 | u32_destroy_key(key->tp, key, false); |
| 393 | } |
| 394 | |
| 395 | /* u32_delete_key_freepf_rcu is the rcu callback variant |
| 396 | * that free's the entire structure including the statistics |
| 397 | * percpu variables. Only use this if the key is not a copy |
| 398 | * returned by u32_init_knode(). See u32_delete_key_rcu() |
| 399 | * for the variant that should be used with keys return from |
| 400 | * u32_init_knode() |
| 401 | */ |
| 402 | static void u32_delete_key_freepf_rcu(struct rcu_head *rcu) |
| 403 | { |
| 404 | struct tc_u_knode *key = container_of(rcu, struct tc_u_knode, rcu); |
| 405 | |
| 406 | u32_destroy_key(key->tp, key, true); |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 407 | } |
| 408 | |
Yang Yingliang | 82d567c | 2013-12-10 20:55:31 +0800 | [diff] [blame] | 409 | static int u32_delete_key(struct tcf_proto *tp, struct tc_u_knode *key) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | { |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 411 | struct tc_u_knode __rcu **kp; |
| 412 | struct tc_u_knode *pkp; |
John Fastabend | a96366bf | 2014-09-15 23:30:49 -0700 | [diff] [blame] | 413 | struct tc_u_hnode *ht = rtnl_dereference(key->ht_up); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | |
| 415 | if (ht) { |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 416 | kp = &ht->ht[TC_U32_HASH(key->handle)]; |
| 417 | for (pkp = rtnl_dereference(*kp); pkp; |
| 418 | kp = &pkp->next, pkp = rtnl_dereference(*kp)) { |
| 419 | if (pkp == key) { |
| 420 | RCU_INIT_POINTER(*kp, key->next); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | |
WANG Cong | a0efb80 | 2014-09-30 16:07:24 -0700 | [diff] [blame] | 422 | tcf_unbind_filter(tp, &key->res); |
John Fastabend | de5df63 | 2014-09-19 21:50:34 -0700 | [diff] [blame] | 423 | call_rcu(&key->rcu, u32_delete_key_freepf_rcu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | return 0; |
| 425 | } |
| 426 | } |
| 427 | } |
Ilpo Järvinen | 547b792 | 2008-07-25 21:43:18 -0700 | [diff] [blame] | 428 | WARN_ON(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | return 0; |
| 430 | } |
| 431 | |
John Fastabend | a1b7c5f | 2016-02-16 21:17:09 -0800 | [diff] [blame] | 432 | static void u32_remove_hw_knode(struct tcf_proto *tp, u32 handle) |
| 433 | { |
| 434 | struct net_device *dev = tp->q->dev_queue->dev; |
| 435 | struct tc_cls_u32_offload u32_offload = {0}; |
| 436 | struct tc_to_netdev offload; |
| 437 | |
| 438 | offload.type = TC_SETUP_CLSU32; |
| 439 | offload.cls_u32 = &u32_offload; |
| 440 | |
Daniel Borkmann | 92c075d | 2016-06-06 22:50:39 +0200 | [diff] [blame] | 441 | if (tc_should_offload(dev, tp, 0)) { |
John Fastabend | a1b7c5f | 2016-02-16 21:17:09 -0800 | [diff] [blame] | 442 | offload.cls_u32->command = TC_CLSU32_DELETE_KNODE; |
| 443 | offload.cls_u32->knode.handle = handle; |
| 444 | dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, |
| 445 | tp->protocol, &offload); |
| 446 | } |
| 447 | } |
| 448 | |
Jamal Hadi Salim | 5a7a555 | 2016-09-18 08:45:33 -0400 | [diff] [blame] | 449 | static int u32_replace_hw_hnode(struct tcf_proto *tp, struct tc_u_hnode *h, |
| 450 | u32 flags) |
John Fastabend | a1b7c5f | 2016-02-16 21:17:09 -0800 | [diff] [blame] | 451 | { |
| 452 | struct net_device *dev = tp->q->dev_queue->dev; |
| 453 | struct tc_cls_u32_offload u32_offload = {0}; |
| 454 | struct tc_to_netdev offload; |
Samudrala, Sridhar | d34e3e1 | 2016-05-12 17:08:23 -0700 | [diff] [blame] | 455 | int err; |
John Fastabend | a1b7c5f | 2016-02-16 21:17:09 -0800 | [diff] [blame] | 456 | |
Daniel Borkmann | 92c075d | 2016-06-06 22:50:39 +0200 | [diff] [blame] | 457 | if (!tc_should_offload(dev, tp, flags)) |
Jakub Kicinski | d47a0f3 | 2016-06-06 16:16:48 +0100 | [diff] [blame] | 458 | return tc_skip_sw(flags) ? -EINVAL : 0; |
| 459 | |
John Fastabend | a1b7c5f | 2016-02-16 21:17:09 -0800 | [diff] [blame] | 460 | offload.type = TC_SETUP_CLSU32; |
| 461 | offload.cls_u32 = &u32_offload; |
| 462 | |
Jakub Kicinski | d47a0f3 | 2016-06-06 16:16:48 +0100 | [diff] [blame] | 463 | offload.cls_u32->command = TC_CLSU32_NEW_HNODE; |
| 464 | offload.cls_u32->hnode.divisor = h->divisor; |
| 465 | offload.cls_u32->hnode.handle = h->handle; |
| 466 | offload.cls_u32->hnode.prio = h->prio; |
John Fastabend | a1b7c5f | 2016-02-16 21:17:09 -0800 | [diff] [blame] | 467 | |
Jakub Kicinski | d47a0f3 | 2016-06-06 16:16:48 +0100 | [diff] [blame] | 468 | err = dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, |
| 469 | tp->protocol, &offload); |
| 470 | if (tc_skip_sw(flags)) |
| 471 | return err; |
Samudrala, Sridhar | d34e3e1 | 2016-05-12 17:08:23 -0700 | [diff] [blame] | 472 | |
| 473 | return 0; |
John Fastabend | a1b7c5f | 2016-02-16 21:17:09 -0800 | [diff] [blame] | 474 | } |
| 475 | |
| 476 | static void u32_clear_hw_hnode(struct tcf_proto *tp, struct tc_u_hnode *h) |
| 477 | { |
| 478 | struct net_device *dev = tp->q->dev_queue->dev; |
| 479 | struct tc_cls_u32_offload u32_offload = {0}; |
| 480 | struct tc_to_netdev offload; |
| 481 | |
| 482 | offload.type = TC_SETUP_CLSU32; |
| 483 | offload.cls_u32 = &u32_offload; |
| 484 | |
Daniel Borkmann | 92c075d | 2016-06-06 22:50:39 +0200 | [diff] [blame] | 485 | if (tc_should_offload(dev, tp, 0)) { |
John Fastabend | a1b7c5f | 2016-02-16 21:17:09 -0800 | [diff] [blame] | 486 | offload.cls_u32->command = TC_CLSU32_DELETE_HNODE; |
| 487 | offload.cls_u32->hnode.divisor = h->divisor; |
| 488 | offload.cls_u32->hnode.handle = h->handle; |
| 489 | offload.cls_u32->hnode.prio = h->prio; |
| 490 | |
| 491 | dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, |
| 492 | tp->protocol, &offload); |
| 493 | } |
| 494 | } |
| 495 | |
Jamal Hadi Salim | 5a7a555 | 2016-09-18 08:45:33 -0400 | [diff] [blame] | 496 | static int u32_replace_hw_knode(struct tcf_proto *tp, struct tc_u_knode *n, |
| 497 | u32 flags) |
John Fastabend | a1b7c5f | 2016-02-16 21:17:09 -0800 | [diff] [blame] | 498 | { |
Paolo Abeni | fa46d14 | 2018-02-02 16:02:22 +0100 | [diff] [blame] | 499 | struct tc_u_hnode *ht = rtnl_dereference(n->ht_down); |
John Fastabend | a1b7c5f | 2016-02-16 21:17:09 -0800 | [diff] [blame] | 500 | struct net_device *dev = tp->q->dev_queue->dev; |
| 501 | struct tc_cls_u32_offload u32_offload = {0}; |
| 502 | struct tc_to_netdev offload; |
Samudrala, Sridhar | d34e3e1 | 2016-05-12 17:08:23 -0700 | [diff] [blame] | 503 | int err; |
John Fastabend | a1b7c5f | 2016-02-16 21:17:09 -0800 | [diff] [blame] | 504 | |
| 505 | offload.type = TC_SETUP_CLSU32; |
| 506 | offload.cls_u32 = &u32_offload; |
| 507 | |
Jakub Kicinski | 201c44b | 2016-06-08 20:11:04 +0100 | [diff] [blame] | 508 | if (!tc_should_offload(dev, tp, flags)) |
| 509 | return tc_skip_sw(flags) ? -EINVAL : 0; |
John Fastabend | a1b7c5f | 2016-02-16 21:17:09 -0800 | [diff] [blame] | 510 | |
Jakub Kicinski | 201c44b | 2016-06-08 20:11:04 +0100 | [diff] [blame] | 511 | offload.cls_u32->command = TC_CLSU32_REPLACE_KNODE; |
| 512 | offload.cls_u32->knode.handle = n->handle; |
| 513 | offload.cls_u32->knode.fshift = n->fshift; |
| 514 | #ifdef CONFIG_CLS_U32_MARK |
| 515 | offload.cls_u32->knode.val = n->val; |
| 516 | offload.cls_u32->knode.mask = n->mask; |
| 517 | #else |
| 518 | offload.cls_u32->knode.val = 0; |
| 519 | offload.cls_u32->knode.mask = 0; |
| 520 | #endif |
| 521 | offload.cls_u32->knode.sel = &n->sel; |
| 522 | offload.cls_u32->knode.exts = &n->exts; |
| 523 | if (n->ht_down) |
Paolo Abeni | fa46d14 | 2018-02-02 16:02:22 +0100 | [diff] [blame] | 524 | offload.cls_u32->knode.link_handle = ht->handle; |
Jakub Kicinski | 201c44b | 2016-06-08 20:11:04 +0100 | [diff] [blame] | 525 | |
| 526 | err = dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, |
| 527 | tp->protocol, &offload); |
| 528 | if (tc_skip_sw(flags)) |
| 529 | return err; |
Samudrala, Sridhar | d34e3e1 | 2016-05-12 17:08:23 -0700 | [diff] [blame] | 530 | |
| 531 | return 0; |
John Fastabend | a1b7c5f | 2016-02-16 21:17:09 -0800 | [diff] [blame] | 532 | } |
| 533 | |
WANG Cong | a0efb80 | 2014-09-30 16:07:24 -0700 | [diff] [blame] | 534 | static void u32_clear_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | { |
| 536 | struct tc_u_knode *n; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 537 | unsigned int h; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 539 | for (h = 0; h <= ht->divisor; h++) { |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 540 | while ((n = rtnl_dereference(ht->ht[h])) != NULL) { |
| 541 | RCU_INIT_POINTER(ht->ht[h], |
| 542 | rtnl_dereference(n->next)); |
WANG Cong | a0efb80 | 2014-09-30 16:07:24 -0700 | [diff] [blame] | 543 | tcf_unbind_filter(tp, &n->res); |
John Fastabend | a1b7c5f | 2016-02-16 21:17:09 -0800 | [diff] [blame] | 544 | u32_remove_hw_knode(tp, n->handle); |
John Fastabend | de5df63 | 2014-09-19 21:50:34 -0700 | [diff] [blame] | 545 | call_rcu(&n->rcu, u32_delete_key_freepf_rcu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | } |
| 547 | } |
| 548 | } |
| 549 | |
| 550 | static int u32_destroy_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht) |
| 551 | { |
| 552 | struct tc_u_common *tp_c = tp->data; |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 553 | struct tc_u_hnode __rcu **hn; |
| 554 | struct tc_u_hnode *phn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | |
Ilpo Järvinen | 547b792 | 2008-07-25 21:43:18 -0700 | [diff] [blame] | 556 | WARN_ON(ht->refcnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | |
WANG Cong | a0efb80 | 2014-09-30 16:07:24 -0700 | [diff] [blame] | 558 | u32_clear_hnode(tp, ht); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 560 | hn = &tp_c->hlist; |
| 561 | for (phn = rtnl_dereference(*hn); |
| 562 | phn; |
| 563 | hn = &phn->next, phn = rtnl_dereference(*hn)) { |
| 564 | if (phn == ht) { |
John Fastabend | a1b7c5f | 2016-02-16 21:17:09 -0800 | [diff] [blame] | 565 | u32_clear_hw_hnode(tp, ht); |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 566 | RCU_INIT_POINTER(*hn, ht->next); |
| 567 | kfree_rcu(ht, rcu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | return 0; |
| 569 | } |
| 570 | } |
| 571 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | return -ENOENT; |
| 573 | } |
| 574 | |
Cong Wang | 1e052be | 2015-03-06 11:47:59 -0800 | [diff] [blame] | 575 | static bool ht_empty(struct tc_u_hnode *ht) |
| 576 | { |
| 577 | unsigned int h; |
| 578 | |
| 579 | for (h = 0; h <= ht->divisor; h++) |
| 580 | if (rcu_access_pointer(ht->ht[h])) |
| 581 | return false; |
| 582 | |
| 583 | return true; |
| 584 | } |
| 585 | |
| 586 | static bool u32_destroy(struct tcf_proto *tp, bool force) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | { |
| 588 | struct tc_u_common *tp_c = tp->data; |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 589 | struct tc_u_hnode *root_ht = rtnl_dereference(tp->root); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | |
Ilpo Järvinen | 547b792 | 2008-07-25 21:43:18 -0700 | [diff] [blame] | 591 | WARN_ON(root_ht == NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | |
Cong Wang | 1e052be | 2015-03-06 11:47:59 -0800 | [diff] [blame] | 593 | if (!force) { |
| 594 | if (root_ht) { |
| 595 | if (root_ht->refcnt > 1) |
| 596 | return false; |
| 597 | if (root_ht->refcnt == 1) { |
| 598 | if (!ht_empty(root_ht)) |
| 599 | return false; |
| 600 | } |
| 601 | } |
WANG Cong | a6c1aea | 2015-08-25 16:38:12 -0700 | [diff] [blame] | 602 | |
| 603 | if (tp_c->refcnt > 1) |
| 604 | return false; |
| 605 | |
| 606 | if (tp_c->refcnt == 1) { |
| 607 | struct tc_u_hnode *ht; |
| 608 | |
| 609 | for (ht = rtnl_dereference(tp_c->hlist); |
| 610 | ht; |
| 611 | ht = rtnl_dereference(ht->next)) |
| 612 | if (!ht_empty(ht)) |
| 613 | return false; |
| 614 | } |
Cong Wang | 1e052be | 2015-03-06 11:47:59 -0800 | [diff] [blame] | 615 | } |
| 616 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | if (root_ht && --root_ht->refcnt == 0) |
| 618 | u32_destroy_hnode(tp, root_ht); |
| 619 | |
| 620 | if (--tp_c->refcnt == 0) { |
| 621 | struct tc_u_hnode *ht; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | |
David S. Miller | 72b25a9 | 2008-07-18 20:54:17 -0700 | [diff] [blame] | 623 | tp->q->u32_node = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 625 | for (ht = rtnl_dereference(tp_c->hlist); |
| 626 | ht; |
| 627 | ht = rtnl_dereference(ht->next)) { |
Jarek Poplawski | e56cfad | 2008-04-12 18:37:13 -0700 | [diff] [blame] | 628 | ht->refcnt--; |
WANG Cong | a0efb80 | 2014-09-30 16:07:24 -0700 | [diff] [blame] | 629 | u32_clear_hnode(tp, ht); |
Jarek Poplawski | e56cfad | 2008-04-12 18:37:13 -0700 | [diff] [blame] | 630 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 632 | while ((ht = rtnl_dereference(tp_c->hlist)) != NULL) { |
| 633 | RCU_INIT_POINTER(tp_c->hlist, ht->next); |
| 634 | kfree_rcu(ht, rcu); |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 635 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | |
| 637 | kfree(tp_c); |
| 638 | } |
| 639 | |
| 640 | tp->data = NULL; |
Cong Wang | 1e052be | 2015-03-06 11:47:59 -0800 | [diff] [blame] | 641 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | } |
| 643 | |
| 644 | static int u32_delete(struct tcf_proto *tp, unsigned long arg) |
| 645 | { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 646 | struct tc_u_hnode *ht = (struct tc_u_hnode *)arg; |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 647 | struct tc_u_hnode *root_ht = rtnl_dereference(tp->root); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | |
| 649 | if (ht == NULL) |
| 650 | return 0; |
| 651 | |
John Fastabend | a1b7c5f | 2016-02-16 21:17:09 -0800 | [diff] [blame] | 652 | if (TC_U32_KEY(ht->handle)) { |
| 653 | u32_remove_hw_knode(tp, ht->handle); |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 654 | return u32_delete_key(tp, (struct tc_u_knode *)ht); |
John Fastabend | a1b7c5f | 2016-02-16 21:17:09 -0800 | [diff] [blame] | 655 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 657 | if (root_ht == ht) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | return -EINVAL; |
| 659 | |
Jarek Poplawski | e56cfad | 2008-04-12 18:37:13 -0700 | [diff] [blame] | 660 | if (ht->refcnt == 1) { |
| 661 | ht->refcnt--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | u32_destroy_hnode(tp, ht); |
Jarek Poplawski | e56cfad | 2008-04-12 18:37:13 -0700 | [diff] [blame] | 663 | } else { |
| 664 | return -EBUSY; |
| 665 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | |
| 667 | return 0; |
| 668 | } |
| 669 | |
Cong Wang | 7801db8 | 2014-07-17 17:34:53 -0700 | [diff] [blame] | 670 | #define NR_U32_NODE (1<<12) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | static u32 gen_new_kid(struct tc_u_hnode *ht, u32 handle) |
| 672 | { |
| 673 | struct tc_u_knode *n; |
Cong Wang | 7801db8 | 2014-07-17 17:34:53 -0700 | [diff] [blame] | 674 | unsigned long i; |
| 675 | unsigned long *bitmap = kzalloc(BITS_TO_LONGS(NR_U32_NODE) * sizeof(unsigned long), |
| 676 | GFP_KERNEL); |
| 677 | if (!bitmap) |
| 678 | return handle | 0xFFF; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 680 | for (n = rtnl_dereference(ht->ht[TC_U32_HASH(handle)]); |
| 681 | n; |
| 682 | n = rtnl_dereference(n->next)) |
Cong Wang | 7801db8 | 2014-07-17 17:34:53 -0700 | [diff] [blame] | 683 | set_bit(TC_U32_NODE(n->handle), bitmap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | |
Cong Wang | 7801db8 | 2014-07-17 17:34:53 -0700 | [diff] [blame] | 685 | i = find_next_zero_bit(bitmap, NR_U32_NODE, 0x800); |
| 686 | if (i >= NR_U32_NODE) |
| 687 | i = find_next_zero_bit(bitmap, NR_U32_NODE, 1); |
| 688 | |
| 689 | kfree(bitmap); |
| 690 | return handle | (i >= NR_U32_NODE ? 0xFFF : i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | } |
| 692 | |
Patrick McHardy | 6fa8c01 | 2008-01-23 20:36:12 -0800 | [diff] [blame] | 693 | static const struct nla_policy u32_policy[TCA_U32_MAX + 1] = { |
| 694 | [TCA_U32_CLASSID] = { .type = NLA_U32 }, |
| 695 | [TCA_U32_HASH] = { .type = NLA_U32 }, |
| 696 | [TCA_U32_LINK] = { .type = NLA_U32 }, |
| 697 | [TCA_U32_DIVISOR] = { .type = NLA_U32 }, |
| 698 | [TCA_U32_SEL] = { .len = sizeof(struct tc_u32_sel) }, |
| 699 | [TCA_U32_INDEV] = { .type = NLA_STRING, .len = IFNAMSIZ }, |
| 700 | [TCA_U32_MARK] = { .len = sizeof(struct tc_u32_mark) }, |
John Fastabend | 9e8ce79 | 2016-02-26 07:54:39 -0800 | [diff] [blame] | 701 | [TCA_U32_FLAGS] = { .type = NLA_U32 }, |
Patrick McHardy | 6fa8c01 | 2008-01-23 20:36:12 -0800 | [diff] [blame] | 702 | }; |
| 703 | |
Benjamin LaHaise | c1b5273 | 2013-01-14 05:15:39 +0000 | [diff] [blame] | 704 | static int u32_set_parms(struct net *net, struct tcf_proto *tp, |
| 705 | unsigned long base, struct tc_u_hnode *ht, |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 706 | struct tc_u_knode *n, struct nlattr **tb, |
Cong Wang | 2f7ef2f | 2014-04-25 13:54:06 -0700 | [diff] [blame] | 707 | struct nlattr *est, bool ovr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | struct tcf_exts e; |
WANG Cong | b9a24bb | 2016-08-19 12:36:54 -0700 | [diff] [blame] | 710 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | |
WANG Cong | b9a24bb | 2016-08-19 12:36:54 -0700 | [diff] [blame] | 712 | err = tcf_exts_init(&e, TCA_U32_ACT, TCA_U32_POLICE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | if (err < 0) |
| 714 | return err; |
WANG Cong | b9a24bb | 2016-08-19 12:36:54 -0700 | [diff] [blame] | 715 | err = tcf_exts_validate(net, tp, tb, est, &e, ovr); |
| 716 | if (err < 0) |
| 717 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | |
| 719 | err = -EINVAL; |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 720 | if (tb[TCA_U32_LINK]) { |
Patrick McHardy | 1587bac | 2008-01-23 20:35:03 -0800 | [diff] [blame] | 721 | u32 handle = nla_get_u32(tb[TCA_U32_LINK]); |
Patrick McHardy | 47a1a1d | 2008-11-19 08:03:09 +0000 | [diff] [blame] | 722 | struct tc_u_hnode *ht_down = NULL, *ht_old; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | |
| 724 | if (TC_U32_KEY(handle)) |
| 725 | goto errout; |
| 726 | |
| 727 | if (handle) { |
| 728 | ht_down = u32_lookup_ht(ht->tp_c, handle); |
| 729 | |
| 730 | if (ht_down == NULL) |
| 731 | goto errout; |
| 732 | ht_down->refcnt++; |
| 733 | } |
| 734 | |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 735 | ht_old = rtnl_dereference(n->ht_down); |
| 736 | rcu_assign_pointer(n->ht_down, ht_down); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | |
Patrick McHardy | 47a1a1d | 2008-11-19 08:03:09 +0000 | [diff] [blame] | 738 | if (ht_old) |
| 739 | ht_old->refcnt--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | } |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 741 | if (tb[TCA_U32_CLASSID]) { |
Patrick McHardy | 1587bac | 2008-01-23 20:35:03 -0800 | [diff] [blame] | 742 | n->res.classid = nla_get_u32(tb[TCA_U32_CLASSID]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | tcf_bind_filter(tp, &n->res, base); |
| 744 | } |
| 745 | |
| 746 | #ifdef CONFIG_NET_CLS_IND |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 747 | if (tb[TCA_U32_INDEV]) { |
WANG Cong | 2519a60 | 2014-01-09 16:14:02 -0800 | [diff] [blame] | 748 | int ret; |
| 749 | ret = tcf_change_indev(net, tb[TCA_U32_INDEV]); |
| 750 | if (ret < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | goto errout; |
WANG Cong | 2519a60 | 2014-01-09 16:14:02 -0800 | [diff] [blame] | 752 | n->ifindex = ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | } |
| 754 | #endif |
| 755 | tcf_exts_change(tp, &n->exts, &e); |
| 756 | |
| 757 | return 0; |
| 758 | errout: |
WANG Cong | 18d0264 | 2014-09-25 10:26:37 -0700 | [diff] [blame] | 759 | tcf_exts_destroy(&e); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 760 | return err; |
| 761 | } |
| 762 | |
Jamal Hadi Salim | 5a7a555 | 2016-09-18 08:45:33 -0400 | [diff] [blame] | 763 | static void u32_replace_knode(struct tcf_proto *tp, struct tc_u_common *tp_c, |
John Fastabend | de5df63 | 2014-09-19 21:50:34 -0700 | [diff] [blame] | 764 | struct tc_u_knode *n) |
| 765 | { |
| 766 | struct tc_u_knode __rcu **ins; |
| 767 | struct tc_u_knode *pins; |
| 768 | struct tc_u_hnode *ht; |
| 769 | |
| 770 | if (TC_U32_HTID(n->handle) == TC_U32_ROOT) |
| 771 | ht = rtnl_dereference(tp->root); |
| 772 | else |
| 773 | ht = u32_lookup_ht(tp_c, TC_U32_HTID(n->handle)); |
| 774 | |
| 775 | ins = &ht->ht[TC_U32_HASH(n->handle)]; |
| 776 | |
| 777 | /* The node must always exist for it to be replaced if this is not the |
| 778 | * case then something went very wrong elsewhere. |
| 779 | */ |
| 780 | for (pins = rtnl_dereference(*ins); ; |
| 781 | ins = &pins->next, pins = rtnl_dereference(*ins)) |
| 782 | if (pins->handle == n->handle) |
| 783 | break; |
| 784 | |
| 785 | RCU_INIT_POINTER(n->next, pins->next); |
| 786 | rcu_assign_pointer(*ins, n); |
| 787 | } |
| 788 | |
| 789 | static struct tc_u_knode *u32_init_knode(struct tcf_proto *tp, |
| 790 | struct tc_u_knode *n) |
| 791 | { |
Paolo Abeni | fa46d14 | 2018-02-02 16:02:22 +0100 | [diff] [blame] | 792 | struct tc_u_hnode *ht = rtnl_dereference(n->ht_down); |
John Fastabend | de5df63 | 2014-09-19 21:50:34 -0700 | [diff] [blame] | 793 | struct tc_u32_sel *s = &n->sel; |
Paolo Abeni | fa46d14 | 2018-02-02 16:02:22 +0100 | [diff] [blame] | 794 | struct tc_u_knode *new; |
John Fastabend | de5df63 | 2014-09-19 21:50:34 -0700 | [diff] [blame] | 795 | |
| 796 | new = kzalloc(sizeof(*n) + s->nkeys*sizeof(struct tc_u32_key), |
| 797 | GFP_KERNEL); |
| 798 | |
| 799 | if (!new) |
| 800 | return NULL; |
| 801 | |
| 802 | RCU_INIT_POINTER(new->next, n->next); |
| 803 | new->handle = n->handle; |
| 804 | RCU_INIT_POINTER(new->ht_up, n->ht_up); |
| 805 | |
| 806 | #ifdef CONFIG_NET_CLS_IND |
| 807 | new->ifindex = n->ifindex; |
| 808 | #endif |
| 809 | new->fshift = n->fshift; |
| 810 | new->res = n->res; |
John Fastabend | 9e8ce79 | 2016-02-26 07:54:39 -0800 | [diff] [blame] | 811 | new->flags = n->flags; |
Paolo Abeni | fa46d14 | 2018-02-02 16:02:22 +0100 | [diff] [blame] | 812 | RCU_INIT_POINTER(new->ht_down, ht); |
John Fastabend | de5df63 | 2014-09-19 21:50:34 -0700 | [diff] [blame] | 813 | |
| 814 | /* bump reference count as long as we hold pointer to structure */ |
Paolo Abeni | fa46d14 | 2018-02-02 16:02:22 +0100 | [diff] [blame] | 815 | if (ht) |
| 816 | ht->refcnt++; |
John Fastabend | de5df63 | 2014-09-19 21:50:34 -0700 | [diff] [blame] | 817 | |
| 818 | #ifdef CONFIG_CLS_U32_PERF |
| 819 | /* Statistics may be incremented by readers during update |
| 820 | * so we must keep them in tact. When the node is later destroyed |
| 821 | * a special destroy call must be made to not free the pf memory. |
| 822 | */ |
| 823 | new->pf = n->pf; |
| 824 | #endif |
| 825 | |
| 826 | #ifdef CONFIG_CLS_U32_MARK |
| 827 | new->val = n->val; |
| 828 | new->mask = n->mask; |
| 829 | /* Similarly success statistics must be moved as pointers */ |
| 830 | new->pcpu_success = n->pcpu_success; |
| 831 | #endif |
| 832 | new->tp = tp; |
| 833 | memcpy(&new->sel, s, sizeof(*s) + s->nkeys*sizeof(struct tc_u32_key)); |
| 834 | |
WANG Cong | b9a24bb | 2016-08-19 12:36:54 -0700 | [diff] [blame] | 835 | if (tcf_exts_init(&new->exts, TCA_U32_ACT, TCA_U32_POLICE)) { |
| 836 | kfree(new); |
| 837 | return NULL; |
| 838 | } |
John Fastabend | de5df63 | 2014-09-19 21:50:34 -0700 | [diff] [blame] | 839 | |
| 840 | return new; |
| 841 | } |
| 842 | |
Benjamin LaHaise | c1b5273 | 2013-01-14 05:15:39 +0000 | [diff] [blame] | 843 | static int u32_change(struct net *net, struct sk_buff *in_skb, |
Eric W. Biederman | af4c664 | 2012-05-25 13:42:45 -0600 | [diff] [blame] | 844 | struct tcf_proto *tp, unsigned long base, u32 handle, |
Jamal Hadi Salim | 5a7a555 | 2016-09-18 08:45:33 -0400 | [diff] [blame] | 845 | struct nlattr **tca, unsigned long *arg, bool ovr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | { |
| 847 | struct tc_u_common *tp_c = tp->data; |
| 848 | struct tc_u_hnode *ht; |
| 849 | struct tc_u_knode *n; |
| 850 | struct tc_u32_sel *s; |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 851 | struct nlattr *opt = tca[TCA_OPTIONS]; |
| 852 | struct nlattr *tb[TCA_U32_MAX + 1]; |
John Fastabend | 9e8ce79 | 2016-02-26 07:54:39 -0800 | [diff] [blame] | 853 | u32 htid, flags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 854 | int err; |
John Fastabend | 459d5f6 | 2014-09-12 20:08:47 -0700 | [diff] [blame] | 855 | #ifdef CONFIG_CLS_U32_PERF |
| 856 | size_t size; |
| 857 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | |
| 859 | if (opt == NULL) |
| 860 | return handle ? -EINVAL : 0; |
| 861 | |
Patrick McHardy | 6fa8c01 | 2008-01-23 20:36:12 -0800 | [diff] [blame] | 862 | err = nla_parse_nested(tb, TCA_U32_MAX, opt, u32_policy); |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 863 | if (err < 0) |
| 864 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | |
Samudrala, Sridhar | d34e3e1 | 2016-05-12 17:08:23 -0700 | [diff] [blame] | 866 | if (tb[TCA_U32_FLAGS]) { |
John Fastabend | 9e8ce79 | 2016-02-26 07:54:39 -0800 | [diff] [blame] | 867 | flags = nla_get_u32(tb[TCA_U32_FLAGS]); |
Samudrala, Sridhar | d34e3e1 | 2016-05-12 17:08:23 -0700 | [diff] [blame] | 868 | if (!tc_flags_valid(flags)) |
Jakub Kicinski | 1a0f7d2 | 2016-06-06 16:16:47 +0100 | [diff] [blame] | 869 | return -EINVAL; |
Samudrala, Sridhar | d34e3e1 | 2016-05-12 17:08:23 -0700 | [diff] [blame] | 870 | } |
John Fastabend | 9e8ce79 | 2016-02-26 07:54:39 -0800 | [diff] [blame] | 871 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 872 | n = (struct tc_u_knode *)*arg; |
| 873 | if (n) { |
John Fastabend | de5df63 | 2014-09-19 21:50:34 -0700 | [diff] [blame] | 874 | struct tc_u_knode *new; |
| 875 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 876 | if (TC_U32_KEY(n->handle) == 0) |
| 877 | return -EINVAL; |
| 878 | |
John Fastabend | 9e8ce79 | 2016-02-26 07:54:39 -0800 | [diff] [blame] | 879 | if (n->flags != flags) |
| 880 | return -EINVAL; |
| 881 | |
John Fastabend | de5df63 | 2014-09-19 21:50:34 -0700 | [diff] [blame] | 882 | new = u32_init_knode(tp, n); |
| 883 | if (!new) |
| 884 | return -ENOMEM; |
| 885 | |
| 886 | err = u32_set_parms(net, tp, base, |
| 887 | rtnl_dereference(n->ht_up), new, tb, |
| 888 | tca[TCA_RATE], ovr); |
| 889 | |
| 890 | if (err) { |
| 891 | u32_destroy_key(tp, new, false); |
| 892 | return err; |
| 893 | } |
| 894 | |
Samudrala, Sridhar | d34e3e1 | 2016-05-12 17:08:23 -0700 | [diff] [blame] | 895 | err = u32_replace_hw_knode(tp, new, flags); |
| 896 | if (err) { |
| 897 | u32_destroy_key(tp, new, false); |
| 898 | return err; |
| 899 | } |
| 900 | |
John Fastabend | de5df63 | 2014-09-19 21:50:34 -0700 | [diff] [blame] | 901 | u32_replace_knode(tp, tp_c, new); |
WANG Cong | a0efb80 | 2014-09-30 16:07:24 -0700 | [diff] [blame] | 902 | tcf_unbind_filter(tp, &n->res); |
John Fastabend | de5df63 | 2014-09-19 21:50:34 -0700 | [diff] [blame] | 903 | call_rcu(&n->rcu, u32_delete_key_rcu); |
| 904 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | } |
| 906 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 907 | if (tb[TCA_U32_DIVISOR]) { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 908 | unsigned int divisor = nla_get_u32(tb[TCA_U32_DIVISOR]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 909 | |
| 910 | if (--divisor > 0x100) |
| 911 | return -EINVAL; |
| 912 | if (TC_U32_KEY(handle)) |
| 913 | return -EINVAL; |
| 914 | if (handle == 0) { |
| 915 | handle = gen_new_htid(tp->data); |
| 916 | if (handle == 0) |
| 917 | return -ENOMEM; |
| 918 | } |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 919 | ht = kzalloc(sizeof(*ht) + divisor*sizeof(void *), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | if (ht == NULL) |
| 921 | return -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 922 | ht->tp_c = tp_c; |
Jarek Poplawski | e56cfad | 2008-04-12 18:37:13 -0700 | [diff] [blame] | 923 | ht->refcnt = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 924 | ht->divisor = divisor; |
| 925 | ht->handle = handle; |
| 926 | ht->prio = tp->prio; |
Jakub Kicinski | 6eef380 | 2016-06-08 20:11:03 +0100 | [diff] [blame] | 927 | |
| 928 | err = u32_replace_hw_hnode(tp, ht, flags); |
| 929 | if (err) { |
| 930 | kfree(ht); |
| 931 | return err; |
| 932 | } |
| 933 | |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 934 | RCU_INIT_POINTER(ht->next, tp_c->hlist); |
| 935 | rcu_assign_pointer(tp_c->hlist, ht); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | *arg = (unsigned long)ht; |
John Fastabend | a1b7c5f | 2016-02-16 21:17:09 -0800 | [diff] [blame] | 937 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | return 0; |
| 939 | } |
| 940 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 941 | if (tb[TCA_U32_HASH]) { |
Patrick McHardy | 1587bac | 2008-01-23 20:35:03 -0800 | [diff] [blame] | 942 | htid = nla_get_u32(tb[TCA_U32_HASH]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | if (TC_U32_HTID(htid) == TC_U32_ROOT) { |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 944 | ht = rtnl_dereference(tp->root); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | htid = ht->handle; |
| 946 | } else { |
| 947 | ht = u32_lookup_ht(tp->data, TC_U32_HTID(htid)); |
| 948 | if (ht == NULL) |
| 949 | return -EINVAL; |
| 950 | } |
| 951 | } else { |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 952 | ht = rtnl_dereference(tp->root); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | htid = ht->handle; |
| 954 | } |
| 955 | |
| 956 | if (ht->divisor < TC_U32_HASH(htid)) |
| 957 | return -EINVAL; |
| 958 | |
| 959 | if (handle) { |
| 960 | if (TC_U32_HTID(handle) && TC_U32_HTID(handle^htid)) |
| 961 | return -EINVAL; |
| 962 | handle = htid | TC_U32_NODE(handle); |
| 963 | } else |
| 964 | handle = gen_new_kid(ht, htid); |
| 965 | |
Patrick McHardy | 6fa8c01 | 2008-01-23 20:36:12 -0800 | [diff] [blame] | 966 | if (tb[TCA_U32_SEL] == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | return -EINVAL; |
| 968 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 969 | s = nla_data(tb[TCA_U32_SEL]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 971 | n = kzalloc(sizeof(*n) + s->nkeys*sizeof(struct tc_u32_key), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | if (n == NULL) |
| 973 | return -ENOBUFS; |
| 974 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | #ifdef CONFIG_CLS_U32_PERF |
John Fastabend | 459d5f6 | 2014-09-12 20:08:47 -0700 | [diff] [blame] | 976 | size = sizeof(struct tc_u32_pcnt) + s->nkeys * sizeof(u64); |
| 977 | n->pf = __alloc_percpu(size, __alignof__(struct tc_u32_pcnt)); |
| 978 | if (!n->pf) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 979 | kfree(n); |
| 980 | return -ENOBUFS; |
| 981 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 982 | #endif |
| 983 | |
| 984 | memcpy(&n->sel, s, sizeof(*s) + s->nkeys*sizeof(struct tc_u32_key)); |
John Fastabend | a96366bf | 2014-09-15 23:30:49 -0700 | [diff] [blame] | 985 | RCU_INIT_POINTER(n->ht_up, ht); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 986 | n->handle = handle; |
Radu Rendec | b226801 | 2007-11-10 21:54:50 -0800 | [diff] [blame] | 987 | n->fshift = s->hmask ? ffs(ntohl(s->hmask)) - 1 : 0; |
John Fastabend | 9e8ce79 | 2016-02-26 07:54:39 -0800 | [diff] [blame] | 988 | n->flags = flags; |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 989 | n->tp = tp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 990 | |
WANG Cong | b9a24bb | 2016-08-19 12:36:54 -0700 | [diff] [blame] | 991 | err = tcf_exts_init(&n->exts, TCA_U32_ACT, TCA_U32_POLICE); |
| 992 | if (err < 0) |
| 993 | goto errout; |
| 994 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 995 | #ifdef CONFIG_CLS_U32_MARK |
John Fastabend | 459d5f6 | 2014-09-12 20:08:47 -0700 | [diff] [blame] | 996 | n->pcpu_success = alloc_percpu(u32); |
John Fastabend | a1ddcfe | 2014-09-19 21:50:04 -0700 | [diff] [blame] | 997 | if (!n->pcpu_success) { |
| 998 | err = -ENOMEM; |
| 999 | goto errout; |
| 1000 | } |
John Fastabend | 459d5f6 | 2014-09-12 20:08:47 -0700 | [diff] [blame] | 1001 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 1002 | if (tb[TCA_U32_MARK]) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | struct tc_u32_mark *mark; |
| 1004 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 1005 | mark = nla_data(tb[TCA_U32_MARK]); |
John Fastabend | 459d5f6 | 2014-09-12 20:08:47 -0700 | [diff] [blame] | 1006 | n->val = mark->val; |
| 1007 | n->mask = mark->mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | } |
| 1009 | #endif |
| 1010 | |
Cong Wang | 2f7ef2f | 2014-04-25 13:54:06 -0700 | [diff] [blame] | 1011 | err = u32_set_parms(net, tp, base, ht, n, tb, tca[TCA_RATE], ovr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | if (err == 0) { |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 1013 | struct tc_u_knode __rcu **ins; |
| 1014 | struct tc_u_knode *pins; |
| 1015 | |
Samudrala, Sridhar | d34e3e1 | 2016-05-12 17:08:23 -0700 | [diff] [blame] | 1016 | err = u32_replace_hw_knode(tp, n, flags); |
| 1017 | if (err) |
| 1018 | goto errhw; |
| 1019 | |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 1020 | ins = &ht->ht[TC_U32_HASH(handle)]; |
| 1021 | for (pins = rtnl_dereference(*ins); pins; |
| 1022 | ins = &pins->next, pins = rtnl_dereference(*ins)) |
| 1023 | if (TC_U32_NODE(handle) < TC_U32_NODE(pins->handle)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1024 | break; |
| 1025 | |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 1026 | RCU_INIT_POINTER(n->next, pins); |
| 1027 | rcu_assign_pointer(*ins, n); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1028 | *arg = (unsigned long)n; |
| 1029 | return 0; |
| 1030 | } |
John Fastabend | a1ddcfe | 2014-09-19 21:50:04 -0700 | [diff] [blame] | 1031 | |
Samudrala, Sridhar | d34e3e1 | 2016-05-12 17:08:23 -0700 | [diff] [blame] | 1032 | errhw: |
John Fastabend | a1ddcfe | 2014-09-19 21:50:04 -0700 | [diff] [blame] | 1033 | #ifdef CONFIG_CLS_U32_MARK |
| 1034 | free_percpu(n->pcpu_success); |
| 1035 | #endif |
| 1036 | |
WANG Cong | b9a24bb | 2016-08-19 12:36:54 -0700 | [diff] [blame] | 1037 | errout: |
| 1038 | tcf_exts_destroy(&n->exts); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | #ifdef CONFIG_CLS_U32_PERF |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 1040 | free_percpu(n->pf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1041 | #endif |
| 1042 | kfree(n); |
| 1043 | return err; |
| 1044 | } |
| 1045 | |
| 1046 | static void u32_walk(struct tcf_proto *tp, struct tcf_walker *arg) |
| 1047 | { |
| 1048 | struct tc_u_common *tp_c = tp->data; |
| 1049 | struct tc_u_hnode *ht; |
| 1050 | struct tc_u_knode *n; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1051 | unsigned int h; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1052 | |
| 1053 | if (arg->stop) |
| 1054 | return; |
| 1055 | |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 1056 | for (ht = rtnl_dereference(tp_c->hlist); |
| 1057 | ht; |
| 1058 | ht = rtnl_dereference(ht->next)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | if (ht->prio != tp->prio) |
| 1060 | continue; |
| 1061 | if (arg->count >= arg->skip) { |
| 1062 | if (arg->fn(tp, (unsigned long)ht, arg) < 0) { |
| 1063 | arg->stop = 1; |
| 1064 | return; |
| 1065 | } |
| 1066 | } |
| 1067 | arg->count++; |
| 1068 | for (h = 0; h <= ht->divisor; h++) { |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 1069 | for (n = rtnl_dereference(ht->ht[h]); |
| 1070 | n; |
| 1071 | n = rtnl_dereference(n->next)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1072 | if (arg->count < arg->skip) { |
| 1073 | arg->count++; |
| 1074 | continue; |
| 1075 | } |
| 1076 | if (arg->fn(tp, (unsigned long)n, arg) < 0) { |
| 1077 | arg->stop = 1; |
| 1078 | return; |
| 1079 | } |
| 1080 | arg->count++; |
| 1081 | } |
| 1082 | } |
| 1083 | } |
| 1084 | } |
| 1085 | |
WANG Cong | 832d1d5 | 2014-01-09 16:14:01 -0800 | [diff] [blame] | 1086 | static int u32_dump(struct net *net, struct tcf_proto *tp, unsigned long fh, |
Jamal Hadi Salim | 5a7a555 | 2016-09-18 08:45:33 -0400 | [diff] [blame] | 1087 | struct sk_buff *skb, struct tcmsg *t) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1089 | struct tc_u_knode *n = (struct tc_u_knode *)fh; |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 1090 | struct tc_u_hnode *ht_up, *ht_down; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 1091 | struct nlattr *nest; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1092 | |
| 1093 | if (n == NULL) |
| 1094 | return skb->len; |
| 1095 | |
| 1096 | t->tcm_handle = n->handle; |
| 1097 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 1098 | nest = nla_nest_start(skb, TCA_OPTIONS); |
| 1099 | if (nest == NULL) |
| 1100 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | |
| 1102 | if (TC_U32_KEY(n->handle) == 0) { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1103 | struct tc_u_hnode *ht = (struct tc_u_hnode *)fh; |
| 1104 | u32 divisor = ht->divisor + 1; |
| 1105 | |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 1106 | if (nla_put_u32(skb, TCA_U32_DIVISOR, divisor)) |
| 1107 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1108 | } else { |
John Fastabend | 459d5f6 | 2014-09-12 20:08:47 -0700 | [diff] [blame] | 1109 | #ifdef CONFIG_CLS_U32_PERF |
| 1110 | struct tc_u32_pcnt *gpf; |
John Fastabend | 459d5f6 | 2014-09-12 20:08:47 -0700 | [diff] [blame] | 1111 | int cpu; |
John Fastabend | 80aab73 | 2014-09-15 23:30:26 -0700 | [diff] [blame] | 1112 | #endif |
John Fastabend | 459d5f6 | 2014-09-12 20:08:47 -0700 | [diff] [blame] | 1113 | |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 1114 | if (nla_put(skb, TCA_U32_SEL, |
| 1115 | sizeof(n->sel) + n->sel.nkeys*sizeof(struct tc_u32_key), |
| 1116 | &n->sel)) |
| 1117 | goto nla_put_failure; |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 1118 | |
| 1119 | ht_up = rtnl_dereference(n->ht_up); |
| 1120 | if (ht_up) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1121 | u32 htid = n->handle & 0xFFFFF000; |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 1122 | if (nla_put_u32(skb, TCA_U32_HASH, htid)) |
| 1123 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1124 | } |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 1125 | if (n->res.classid && |
| 1126 | nla_put_u32(skb, TCA_U32_CLASSID, n->res.classid)) |
| 1127 | goto nla_put_failure; |
John Fastabend | 1ce8772 | 2014-09-12 20:09:16 -0700 | [diff] [blame] | 1128 | |
| 1129 | ht_down = rtnl_dereference(n->ht_down); |
| 1130 | if (ht_down && |
| 1131 | nla_put_u32(skb, TCA_U32_LINK, ht_down->handle)) |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 1132 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1133 | |
John Fastabend | 9e8ce79 | 2016-02-26 07:54:39 -0800 | [diff] [blame] | 1134 | if (n->flags && nla_put_u32(skb, TCA_U32_FLAGS, n->flags)) |
| 1135 | goto nla_put_failure; |
| 1136 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | #ifdef CONFIG_CLS_U32_MARK |
John Fastabend | 459d5f6 | 2014-09-12 20:08:47 -0700 | [diff] [blame] | 1138 | if ((n->val || n->mask)) { |
| 1139 | struct tc_u32_mark mark = {.val = n->val, |
| 1140 | .mask = n->mask, |
| 1141 | .success = 0}; |
John Fastabend | 80aab73 | 2014-09-15 23:30:26 -0700 | [diff] [blame] | 1142 | int cpum; |
John Fastabend | 459d5f6 | 2014-09-12 20:08:47 -0700 | [diff] [blame] | 1143 | |
John Fastabend | 80aab73 | 2014-09-15 23:30:26 -0700 | [diff] [blame] | 1144 | for_each_possible_cpu(cpum) { |
| 1145 | __u32 cnt = *per_cpu_ptr(n->pcpu_success, cpum); |
John Fastabend | 459d5f6 | 2014-09-12 20:08:47 -0700 | [diff] [blame] | 1146 | |
| 1147 | mark.success += cnt; |
| 1148 | } |
| 1149 | |
| 1150 | if (nla_put(skb, TCA_U32_MARK, sizeof(mark), &mark)) |
| 1151 | goto nla_put_failure; |
| 1152 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1153 | #endif |
| 1154 | |
WANG Cong | 5da57f4 | 2013-12-15 20:15:07 -0800 | [diff] [blame] | 1155 | if (tcf_exts_dump(skb, &n->exts) < 0) |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 1156 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1157 | |
| 1158 | #ifdef CONFIG_NET_CLS_IND |
WANG Cong | 2519a60 | 2014-01-09 16:14:02 -0800 | [diff] [blame] | 1159 | if (n->ifindex) { |
| 1160 | struct net_device *dev; |
| 1161 | dev = __dev_get_by_index(net, n->ifindex); |
| 1162 | if (dev && nla_put_string(skb, TCA_U32_INDEV, dev->name)) |
| 1163 | goto nla_put_failure; |
| 1164 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | #endif |
| 1166 | #ifdef CONFIG_CLS_U32_PERF |
John Fastabend | 459d5f6 | 2014-09-12 20:08:47 -0700 | [diff] [blame] | 1167 | gpf = kzalloc(sizeof(struct tc_u32_pcnt) + |
| 1168 | n->sel.nkeys * sizeof(u64), |
| 1169 | GFP_KERNEL); |
| 1170 | if (!gpf) |
| 1171 | goto nla_put_failure; |
| 1172 | |
| 1173 | for_each_possible_cpu(cpu) { |
| 1174 | int i; |
| 1175 | struct tc_u32_pcnt *pf = per_cpu_ptr(n->pf, cpu); |
| 1176 | |
| 1177 | gpf->rcnt += pf->rcnt; |
| 1178 | gpf->rhit += pf->rhit; |
| 1179 | for (i = 0; i < n->sel.nkeys; i++) |
| 1180 | gpf->kcnts[i] += pf->kcnts[i]; |
| 1181 | } |
| 1182 | |
Nicolas Dichtel | 9854518 | 2016-04-26 10:06:18 +0200 | [diff] [blame] | 1183 | if (nla_put_64bit(skb, TCA_U32_PCNT, |
| 1184 | sizeof(struct tc_u32_pcnt) + |
| 1185 | n->sel.nkeys * sizeof(u64), |
| 1186 | gpf, TCA_U32_PAD)) { |
John Fastabend | 459d5f6 | 2014-09-12 20:08:47 -0700 | [diff] [blame] | 1187 | kfree(gpf); |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 1188 | goto nla_put_failure; |
John Fastabend | 459d5f6 | 2014-09-12 20:08:47 -0700 | [diff] [blame] | 1189 | } |
| 1190 | kfree(gpf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1191 | #endif |
| 1192 | } |
| 1193 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 1194 | nla_nest_end(skb, nest); |
| 1195 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1196 | if (TC_U32_KEY(n->handle)) |
WANG Cong | 5da57f4 | 2013-12-15 20:15:07 -0800 | [diff] [blame] | 1197 | if (tcf_exts_dump_stats(skb, &n->exts) < 0) |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 1198 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1199 | return skb->len; |
| 1200 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 1201 | nla_put_failure: |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 1202 | nla_nest_cancel(skb, nest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1203 | return -1; |
| 1204 | } |
| 1205 | |
Patrick McHardy | 2eb9d75 | 2008-01-22 22:10:42 -0800 | [diff] [blame] | 1206 | static struct tcf_proto_ops cls_u32_ops __read_mostly = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1207 | .kind = "u32", |
| 1208 | .classify = u32_classify, |
| 1209 | .init = u32_init, |
| 1210 | .destroy = u32_destroy, |
| 1211 | .get = u32_get, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1212 | .change = u32_change, |
| 1213 | .delete = u32_delete, |
| 1214 | .walk = u32_walk, |
| 1215 | .dump = u32_dump, |
| 1216 | .owner = THIS_MODULE, |
| 1217 | }; |
| 1218 | |
| 1219 | static int __init init_u32(void) |
| 1220 | { |
stephen hemminger | 6ff9c36 | 2010-05-12 06:37:05 +0000 | [diff] [blame] | 1221 | pr_info("u32 classifier\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1222 | #ifdef CONFIG_CLS_U32_PERF |
stephen hemminger | 6ff9c36 | 2010-05-12 06:37:05 +0000 | [diff] [blame] | 1223 | pr_info(" Performance counters on\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1224 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1225 | #ifdef CONFIG_NET_CLS_IND |
stephen hemminger | 6ff9c36 | 2010-05-12 06:37:05 +0000 | [diff] [blame] | 1226 | pr_info(" input device check on\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1227 | #endif |
| 1228 | #ifdef CONFIG_NET_CLS_ACT |
stephen hemminger | 6ff9c36 | 2010-05-12 06:37:05 +0000 | [diff] [blame] | 1229 | pr_info(" Actions configured\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1230 | #endif |
| 1231 | return register_tcf_proto_ops(&cls_u32_ops); |
| 1232 | } |
| 1233 | |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 1234 | static void __exit exit_u32(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1235 | { |
| 1236 | unregister_tcf_proto_ops(&cls_u32_ops); |
| 1237 | } |
| 1238 | |
| 1239 | module_init(init_u32) |
| 1240 | module_exit(exit_u32) |
| 1241 | MODULE_LICENSE("GPL"); |