| /* |
| * net/sched/cls_u32.c Ugly (or Universal) 32bit key Packet Classifier. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| * |
| * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> |
| * |
| * The filters are packed to hash tables of key nodes |
| * with a set of 32bit key/mask pairs at every node. |
| * Nodes reference next level hash tables etc. |
| * |
| * This scheme is the best universal classifier I managed to |
| * invent; it is not super-fast, but it is not slow (provided you |
| * program it correctly), and general enough. And its relative |
| * speed grows as the number of rules becomes larger. |
| * |
| * It seems that it represents the best middle point between |
| * speed and manageability both by human and by machine. |
| * |
| * It is especially useful for link sharing combined with QoS; |
| * pure RSVP doesn't need such a general approach and can use |
| * much simpler (and faster) schemes, sort of cls_rsvp.c. |
| * |
| * JHS: We should remove the CONFIG_NET_CLS_IND from here |
| * eventually when the meta match extension is made available |
| * |
| * nfmark match added by Catalin(ux aka Dino) BOIE <catab at umbrella.ro> |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/types.h> |
| #include <linux/kernel.h> |
| #include <linux/string.h> |
| #include <linux/errno.h> |
| #include <linux/rtnetlink.h> |
| #include <linux/skbuff.h> |
| #include <net/netlink.h> |
| #include <net/act_api.h> |
| #include <net/pkt_cls.h> |
| |
| struct tc_u_knode |
| { |
| struct tc_u_knode *next; |
| u32 handle; |
| struct tc_u_hnode *ht_up; |
| struct tcf_exts exts; |
| #ifdef CONFIG_NET_CLS_IND |
| char indev[IFNAMSIZ]; |
| #endif |
| u8 fshift; |
| struct tcf_result res; |
| struct tc_u_hnode *ht_down; |
| #ifdef CONFIG_CLS_U32_PERF |
| struct tc_u32_pcnt *pf; |
| #endif |
| #ifdef CONFIG_CLS_U32_MARK |
| struct tc_u32_mark mark; |
| #endif |
| struct tc_u32_sel sel; |
| }; |
| |
| struct tc_u_hnode |
| { |
| struct tc_u_hnode *next; |
| u32 handle; |
| u32 prio; |
| struct tc_u_common *tp_c; |
| int refcnt; |
| unsigned divisor; |
| struct tc_u_knode *ht[1]; |
| }; |
| |
| struct tc_u_common |
| { |
| struct tc_u_common *next; |
| struct tc_u_hnode *hlist; |
| struct Qdisc *q; |
| int refcnt; |
| u32 hgenerator; |
| }; |
| |
| static struct tcf_ext_map u32_ext_map = { |
| .action = TCA_U32_ACT, |
| .police = TCA_U32_POLICE |
| }; |
| |
| static struct tc_u_common *u32_list; |
| |
| static __inline__ unsigned u32_hash_fold(u32 key, struct tc_u32_sel *sel, u8 fshift) |
| { |
| unsigned h = ntohl(key & sel->hmask)>>fshift; |
| |
| return h; |
| } |
| |
| static int u32_classify(struct sk_buff *skb, struct tcf_proto *tp, struct tcf_result *res) |
| { |
| struct { |
| struct tc_u_knode *knode; |
| u8 *ptr; |
| } stack[TC_U32_MAXDEPTH]; |
| |
| struct tc_u_hnode *ht = (struct tc_u_hnode*)tp->root; |
| u8 *ptr = skb_network_header(skb); |
| struct tc_u_knode *n; |
| int sdepth = 0; |
| int off2 = 0; |
| int sel = 0; |
| #ifdef CONFIG_CLS_U32_PERF |
| int j; |
| #endif |
| int i, r; |
| |
| next_ht: |
| n = ht->ht[sel]; |
| |
| next_knode: |
| if (n) { |
| struct tc_u32_key *key = n->sel.keys; |
| |
| #ifdef CONFIG_CLS_U32_PERF |
| n->pf->rcnt +=1; |
| j = 0; |
| #endif |
| |
| #ifdef CONFIG_CLS_U32_MARK |
| if ((skb->mark & n->mark.mask) != n->mark.val) { |
| n = n->next; |
| goto next_knode; |
| } else { |
| n->mark.success++; |
| } |
| #endif |
| |
| for (i = n->sel.nkeys; i>0; i--, key++) { |
| |
| if ((*(u32*)(ptr+key->off+(off2&key->offmask))^key->val)&key->mask) { |
| n = n->next; |
| goto next_knode; |
| } |
| #ifdef CONFIG_CLS_U32_PERF |
| n->pf->kcnts[j] +=1; |
| j++; |
| #endif |
| } |
| if (n->ht_down == NULL) { |
| check_terminal: |
| if (n->sel.flags&TC_U32_TERMINAL) { |
| |
| *res = n->res; |
| #ifdef CONFIG_NET_CLS_IND |
| if (!tcf_match_indev(skb, n->indev)) { |
| n = n->next; |
| goto next_knode; |
| } |
| #endif |
| #ifdef CONFIG_CLS_U32_PERF |
| n->pf->rhit +=1; |
| #endif |
| r = tcf_exts_exec(skb, &n->exts, res); |
| if (r < 0) { |
| n = n->next; |
| goto next_knode; |
| } |
| |
| return r; |
| } |
| n = n->next; |
| goto next_knode; |
| } |
| |
| /* PUSH */ |
| if (sdepth >= TC_U32_MAXDEPTH) |
| goto deadloop; |
| stack[sdepth].knode = n; |
| stack[sdepth].ptr = ptr; |
| sdepth++; |
| |
| ht = n->ht_down; |
| sel = 0; |
| if (ht->divisor) |
| sel = ht->divisor&u32_hash_fold(*(u32*)(ptr+n->sel.hoff), &n->sel,n->fshift); |
| |
| if (!(n->sel.flags&(TC_U32_VAROFFSET|TC_U32_OFFSET|TC_U32_EAT))) |
| goto next_ht; |
| |
| if (n->sel.flags&(TC_U32_OFFSET|TC_U32_VAROFFSET)) { |
| off2 = n->sel.off + 3; |
| if (n->sel.flags&TC_U32_VAROFFSET) |
| off2 += ntohs(n->sel.offmask & *(u16*)(ptr+n->sel.offoff)) >>n->sel.offshift; |
| off2 &= ~3; |
| } |
| if (n->sel.flags&TC_U32_EAT) { |
| ptr += off2; |
| off2 = 0; |
| } |
| |
| if (ptr < skb_tail_pointer(skb)) |
| goto next_ht; |
| } |
| |
| /* POP */ |
| if (sdepth--) { |
| n = stack[sdepth].knode; |
| ht = n->ht_up; |
| ptr = stack[sdepth].ptr; |
| goto check_terminal; |
| } |
| return -1; |
| |
| deadloop: |
| if (net_ratelimit()) |
| printk("cls_u32: dead loop\n"); |
| return -1; |
| } |
| |
| static __inline__ struct tc_u_hnode * |
| u32_lookup_ht(struct tc_u_common *tp_c, u32 handle) |
| { |
| struct tc_u_hnode *ht; |
| |
| for (ht = tp_c->hlist; ht; ht = ht->next) |
| if (ht->handle == handle) |
| break; |
| |
| return ht; |
| } |
| |
| static __inline__ struct tc_u_knode * |
| u32_lookup_key(struct tc_u_hnode *ht, u32 handle) |
| { |
| unsigned sel; |
| struct tc_u_knode *n = NULL; |
| |
| sel = TC_U32_HASH(handle); |
| if (sel > ht->divisor) |
| goto out; |
| |
| for (n = ht->ht[sel]; n; n = n->next) |
| if (n->handle == handle) |
| break; |
| out: |
| return n; |
| } |
| |
| |
| static unsigned long u32_get(struct tcf_proto *tp, u32 handle) |
| { |
| struct tc_u_hnode *ht; |
| struct tc_u_common *tp_c = tp->data; |
| |
| if (TC_U32_HTID(handle) == TC_U32_ROOT) |
| ht = tp->root; |
| else |
| ht = u32_lookup_ht(tp_c, TC_U32_HTID(handle)); |
| |
| if (!ht) |
| return 0; |
| |
| if (TC_U32_KEY(handle) == 0) |
| return (unsigned long)ht; |
| |
| return (unsigned long)u32_lookup_key(ht, handle); |
| } |
| |
| static void u32_put(struct tcf_proto *tp, unsigned long f) |
| { |
| } |
| |
| static u32 gen_new_htid(struct tc_u_common *tp_c) |
| { |
| int i = 0x800; |
| |
| do { |
| if (++tp_c->hgenerator == 0x7FF) |
| tp_c->hgenerator = 1; |
| } while (--i>0 && u32_lookup_ht(tp_c, (tp_c->hgenerator|0x800)<<20)); |
| |
| return i > 0 ? (tp_c->hgenerator|0x800)<<20 : 0; |
| } |
| |
| static int u32_init(struct tcf_proto *tp) |
| { |
| struct tc_u_hnode *root_ht; |
| struct tc_u_common *tp_c; |
| |
| for (tp_c = u32_list; tp_c; tp_c = tp_c->next) |
| if (tp_c->q == tp->q) |
| break; |
| |
| root_ht = kzalloc(sizeof(*root_ht), GFP_KERNEL); |
| if (root_ht == NULL) |
| return -ENOBUFS; |
| |
| root_ht->divisor = 0; |
| root_ht->refcnt++; |
| root_ht->handle = tp_c ? gen_new_htid(tp_c) : 0x80000000; |
| root_ht->prio = tp->prio; |
| |
| if (tp_c == NULL) { |
| tp_c = kzalloc(sizeof(*tp_c), GFP_KERNEL); |
| if (tp_c == NULL) { |
| kfree(root_ht); |
| return -ENOBUFS; |
| } |
| tp_c->q = tp->q; |
| tp_c->next = u32_list; |
| u32_list = tp_c; |
| } |
| |
| tp_c->refcnt++; |
| root_ht->next = tp_c->hlist; |
| tp_c->hlist = root_ht; |
| root_ht->tp_c = tp_c; |
| |
| tp->root = root_ht; |
| tp->data = tp_c; |
| return 0; |
| } |
| |
| static int u32_destroy_key(struct tcf_proto *tp, struct tc_u_knode *n) |
| { |
| tcf_unbind_filter(tp, &n->res); |
| tcf_exts_destroy(tp, &n->exts); |
| if (n->ht_down) |
| n->ht_down->refcnt--; |
| #ifdef CONFIG_CLS_U32_PERF |
| kfree(n->pf); |
| #endif |
| kfree(n); |
| return 0; |
| } |
| |
| static int u32_delete_key(struct tcf_proto *tp, struct tc_u_knode* key) |
| { |
| struct tc_u_knode **kp; |
| struct tc_u_hnode *ht = key->ht_up; |
| |
| if (ht) { |
| for (kp = &ht->ht[TC_U32_HASH(key->handle)]; *kp; kp = &(*kp)->next) { |
| if (*kp == key) { |
| tcf_tree_lock(tp); |
| *kp = key->next; |
| tcf_tree_unlock(tp); |
| |
| u32_destroy_key(tp, key); |
| return 0; |
| } |
| } |
| } |
| BUG_TRAP(0); |
| return 0; |
| } |
| |
| static void u32_clear_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht) |
| { |
| struct tc_u_knode *n; |
| unsigned h; |
| |
| for (h=0; h<=ht->divisor; h++) { |
| while ((n = ht->ht[h]) != NULL) { |
| ht->ht[h] = n->next; |
| |
| u32_destroy_key(tp, n); |
| } |
| } |
| } |
| |
| static int u32_destroy_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht) |
| { |
| struct tc_u_common *tp_c = tp->data; |
| struct tc_u_hnode **hn; |
| |
| BUG_TRAP(!ht->refcnt); |
| |
| u32_clear_hnode(tp, ht); |
| |
| for (hn = &tp_c->hlist; *hn; hn = &(*hn)->next) { |
| if (*hn == ht) { |
| *hn = ht->next; |
| kfree(ht); |
| return 0; |
| } |
| } |
| |
| BUG_TRAP(0); |
| return -ENOENT; |
| } |
| |
| static void u32_destroy(struct tcf_proto *tp) |
| { |
| struct tc_u_common *tp_c = tp->data; |
| struct tc_u_hnode *root_ht = xchg(&tp->root, NULL); |
| |
| BUG_TRAP(root_ht != NULL); |
| |
| if (root_ht && --root_ht->refcnt == 0) |
| u32_destroy_hnode(tp, root_ht); |
| |
| if (--tp_c->refcnt == 0) { |
| struct tc_u_hnode *ht; |
| struct tc_u_common **tp_cp; |
| |
| for (tp_cp = &u32_list; *tp_cp; tp_cp = &(*tp_cp)->next) { |
| if (*tp_cp == tp_c) { |
| *tp_cp = tp_c->next; |
| break; |
| } |
| } |
| |
| for (ht=tp_c->hlist; ht; ht = ht->next) |
| u32_clear_hnode(tp, ht); |
| |
| while ((ht = tp_c->hlist) != NULL) { |
| tp_c->hlist = ht->next; |
| |
| BUG_TRAP(ht->refcnt == 0); |
| |
| kfree(ht); |
| } |
| |
| kfree(tp_c); |
| } |
| |
| tp->data = NULL; |
| } |
| |
| static int u32_delete(struct tcf_proto *tp, unsigned long arg) |
| { |
| struct tc_u_hnode *ht = (struct tc_u_hnode*)arg; |
| |
| if (ht == NULL) |
| return 0; |
| |
| if (TC_U32_KEY(ht->handle)) |
| return u32_delete_key(tp, (struct tc_u_knode*)ht); |
| |
| if (tp->root == ht) |
| return -EINVAL; |
| |
| if (--ht->refcnt == 0) |
| u32_destroy_hnode(tp, ht); |
| |
| return 0; |
| } |
| |
| static u32 gen_new_kid(struct tc_u_hnode *ht, u32 handle) |
| { |
| struct tc_u_knode *n; |
| unsigned i = 0x7FF; |
| |
| for (n=ht->ht[TC_U32_HASH(handle)]; n; n = n->next) |
| if (i < TC_U32_NODE(n->handle)) |
| i = TC_U32_NODE(n->handle); |
| i++; |
| |
| return handle|(i>0xFFF ? 0xFFF : i); |
| } |
| |
| static int u32_set_parms(struct tcf_proto *tp, unsigned long base, |
| struct tc_u_hnode *ht, |
| struct tc_u_knode *n, struct nlattr **tb, |
| struct nlattr *est) |
| { |
| int err; |
| struct tcf_exts e; |
| |
| err = tcf_exts_validate(tp, tb, est, &e, &u32_ext_map); |
| if (err < 0) |
| return err; |
| |
| err = -EINVAL; |
| if (tb[TCA_U32_LINK]) { |
| u32 handle = *(u32*)nla_data(tb[TCA_U32_LINK]); |
| struct tc_u_hnode *ht_down = NULL; |
| |
| if (TC_U32_KEY(handle)) |
| goto errout; |
| |
| if (handle) { |
| ht_down = u32_lookup_ht(ht->tp_c, handle); |
| |
| if (ht_down == NULL) |
| goto errout; |
| ht_down->refcnt++; |
| } |
| |
| tcf_tree_lock(tp); |
| ht_down = xchg(&n->ht_down, ht_down); |
| tcf_tree_unlock(tp); |
| |
| if (ht_down) |
| ht_down->refcnt--; |
| } |
| if (tb[TCA_U32_CLASSID]) { |
| n->res.classid = *(u32*)nla_data(tb[TCA_U32_CLASSID]); |
| tcf_bind_filter(tp, &n->res, base); |
| } |
| |
| #ifdef CONFIG_NET_CLS_IND |
| if (tb[TCA_U32_INDEV]) { |
| err = tcf_change_indev(tp, n->indev, tb[TCA_U32_INDEV]); |
| if (err < 0) |
| goto errout; |
| } |
| #endif |
| tcf_exts_change(tp, &n->exts, &e); |
| |
| return 0; |
| errout: |
| tcf_exts_destroy(tp, &e); |
| return err; |
| } |
| |
| static int u32_change(struct tcf_proto *tp, unsigned long base, u32 handle, |
| struct nlattr **tca, |
| unsigned long *arg) |
| { |
| struct tc_u_common *tp_c = tp->data; |
| struct tc_u_hnode *ht; |
| struct tc_u_knode *n; |
| struct tc_u32_sel *s; |
| struct nlattr *opt = tca[TCA_OPTIONS]; |
| struct nlattr *tb[TCA_U32_MAX + 1]; |
| u32 htid; |
| int err; |
| |
| if (opt == NULL) |
| return handle ? -EINVAL : 0; |
| |
| err = nla_parse_nested(tb, TCA_U32_MAX, opt, NULL); |
| if (err < 0) |
| return err; |
| |
| if ((n = (struct tc_u_knode*)*arg) != NULL) { |
| if (TC_U32_KEY(n->handle) == 0) |
| return -EINVAL; |
| |
| return u32_set_parms(tp, base, n->ht_up, n, tb, tca[TCA_RATE]); |
| } |
| |
| if (tb[TCA_U32_DIVISOR]) { |
| unsigned divisor = *(unsigned*)nla_data(tb[TCA_U32_DIVISOR]); |
| |
| if (--divisor > 0x100) |
| return -EINVAL; |
| if (TC_U32_KEY(handle)) |
| return -EINVAL; |
| if (handle == 0) { |
| handle = gen_new_htid(tp->data); |
| if (handle == 0) |
| return -ENOMEM; |
| } |
| ht = kzalloc(sizeof(*ht) + divisor*sizeof(void*), GFP_KERNEL); |
| if (ht == NULL) |
| return -ENOBUFS; |
| ht->tp_c = tp_c; |
| ht->refcnt = 0; |
| ht->divisor = divisor; |
| ht->handle = handle; |
| ht->prio = tp->prio; |
| ht->next = tp_c->hlist; |
| tp_c->hlist = ht; |
| *arg = (unsigned long)ht; |
| return 0; |
| } |
| |
| if (tb[TCA_U32_HASH]) { |
| htid = *(unsigned*)nla_data(tb[TCA_U32_HASH]); |
| if (TC_U32_HTID(htid) == TC_U32_ROOT) { |
| ht = tp->root; |
| htid = ht->handle; |
| } else { |
| ht = u32_lookup_ht(tp->data, TC_U32_HTID(htid)); |
| if (ht == NULL) |
| return -EINVAL; |
| } |
| } else { |
| ht = tp->root; |
| htid = ht->handle; |
| } |
| |
| if (ht->divisor < TC_U32_HASH(htid)) |
| return -EINVAL; |
| |
| if (handle) { |
| if (TC_U32_HTID(handle) && TC_U32_HTID(handle^htid)) |
| return -EINVAL; |
| handle = htid | TC_U32_NODE(handle); |
| } else |
| handle = gen_new_kid(ht, htid); |
| |
| if (tb[TCA_U32_SEL] == NULL || |
| nla_len(tb[TCA_U32_SEL]) < sizeof(struct tc_u32_sel)) |
| return -EINVAL; |
| |
| s = nla_data(tb[TCA_U32_SEL]); |
| |
| n = kzalloc(sizeof(*n) + s->nkeys*sizeof(struct tc_u32_key), GFP_KERNEL); |
| if (n == NULL) |
| return -ENOBUFS; |
| |
| #ifdef CONFIG_CLS_U32_PERF |
| n->pf = kzalloc(sizeof(struct tc_u32_pcnt) + s->nkeys*sizeof(u64), GFP_KERNEL); |
| if (n->pf == NULL) { |
| kfree(n); |
| return -ENOBUFS; |
| } |
| #endif |
| |
| memcpy(&n->sel, s, sizeof(*s) + s->nkeys*sizeof(struct tc_u32_key)); |
| n->ht_up = ht; |
| n->handle = handle; |
| n->fshift = s->hmask ? ffs(ntohl(s->hmask)) - 1 : 0; |
| |
| #ifdef CONFIG_CLS_U32_MARK |
| if (tb[TCA_U32_MARK]) { |
| struct tc_u32_mark *mark; |
| |
| if (nla_len(tb[TCA_U32_MARK]) < sizeof(struct tc_u32_mark)) { |
| #ifdef CONFIG_CLS_U32_PERF |
| kfree(n->pf); |
| #endif |
| kfree(n); |
| return -EINVAL; |
| } |
| mark = nla_data(tb[TCA_U32_MARK]); |
| memcpy(&n->mark, mark, sizeof(struct tc_u32_mark)); |
| n->mark.success = 0; |
| } |
| #endif |
| |
| err = u32_set_parms(tp, base, ht, n, tb, tca[TCA_RATE]); |
| if (err == 0) { |
| struct tc_u_knode **ins; |
| for (ins = &ht->ht[TC_U32_HASH(handle)]; *ins; ins = &(*ins)->next) |
| if (TC_U32_NODE(handle) < TC_U32_NODE((*ins)->handle)) |
| break; |
| |
| n->next = *ins; |
| wmb(); |
| *ins = n; |
| |
| *arg = (unsigned long)n; |
| return 0; |
| } |
| #ifdef CONFIG_CLS_U32_PERF |
| kfree(n->pf); |
| #endif |
| kfree(n); |
| return err; |
| } |
| |
| static void u32_walk(struct tcf_proto *tp, struct tcf_walker *arg) |
| { |
| struct tc_u_common *tp_c = tp->data; |
| struct tc_u_hnode *ht; |
| struct tc_u_knode *n; |
| unsigned h; |
| |
| if (arg->stop) |
| return; |
| |
| for (ht = tp_c->hlist; ht; ht = ht->next) { |
| if (ht->prio != tp->prio) |
| continue; |
| if (arg->count >= arg->skip) { |
| if (arg->fn(tp, (unsigned long)ht, arg) < 0) { |
| arg->stop = 1; |
| return; |
| } |
| } |
| arg->count++; |
| for (h = 0; h <= ht->divisor; h++) { |
| for (n = ht->ht[h]; n; n = n->next) { |
| if (arg->count < arg->skip) { |
| arg->count++; |
| continue; |
| } |
| if (arg->fn(tp, (unsigned long)n, arg) < 0) { |
| arg->stop = 1; |
| return; |
| } |
| arg->count++; |
| } |
| } |
| } |
| } |
| |
| static int u32_dump(struct tcf_proto *tp, unsigned long fh, |
| struct sk_buff *skb, struct tcmsg *t) |
| { |
| struct tc_u_knode *n = (struct tc_u_knode*)fh; |
| unsigned char *b = skb_tail_pointer(skb); |
| struct nlattr *nla; |
| |
| if (n == NULL) |
| return skb->len; |
| |
| t->tcm_handle = n->handle; |
| |
| nla = (struct nlattr*)b; |
| NLA_PUT(skb, TCA_OPTIONS, 0, NULL); |
| |
| if (TC_U32_KEY(n->handle) == 0) { |
| struct tc_u_hnode *ht = (struct tc_u_hnode*)fh; |
| u32 divisor = ht->divisor+1; |
| NLA_PUT(skb, TCA_U32_DIVISOR, 4, &divisor); |
| } else { |
| NLA_PUT(skb, TCA_U32_SEL, |
| sizeof(n->sel) + n->sel.nkeys*sizeof(struct tc_u32_key), |
| &n->sel); |
| if (n->ht_up) { |
| u32 htid = n->handle & 0xFFFFF000; |
| NLA_PUT(skb, TCA_U32_HASH, 4, &htid); |
| } |
| if (n->res.classid) |
| NLA_PUT(skb, TCA_U32_CLASSID, 4, &n->res.classid); |
| if (n->ht_down) |
| NLA_PUT(skb, TCA_U32_LINK, 4, &n->ht_down->handle); |
| |
| #ifdef CONFIG_CLS_U32_MARK |
| if (n->mark.val || n->mark.mask) |
| NLA_PUT(skb, TCA_U32_MARK, sizeof(n->mark), &n->mark); |
| #endif |
| |
| if (tcf_exts_dump(skb, &n->exts, &u32_ext_map) < 0) |
| goto nla_put_failure; |
| |
| #ifdef CONFIG_NET_CLS_IND |
| if(strlen(n->indev)) |
| NLA_PUT(skb, TCA_U32_INDEV, IFNAMSIZ, n->indev); |
| #endif |
| #ifdef CONFIG_CLS_U32_PERF |
| NLA_PUT(skb, TCA_U32_PCNT, |
| sizeof(struct tc_u32_pcnt) + n->sel.nkeys*sizeof(u64), |
| n->pf); |
| #endif |
| } |
| |
| nla->nla_len = skb_tail_pointer(skb) - b; |
| if (TC_U32_KEY(n->handle)) |
| if (tcf_exts_dump_stats(skb, &n->exts, &u32_ext_map) < 0) |
| goto nla_put_failure; |
| return skb->len; |
| |
| nla_put_failure: |
| nlmsg_trim(skb, b); |
| return -1; |
| } |
| |
| static struct tcf_proto_ops cls_u32_ops __read_mostly = { |
| .kind = "u32", |
| .classify = u32_classify, |
| .init = u32_init, |
| .destroy = u32_destroy, |
| .get = u32_get, |
| .put = u32_put, |
| .change = u32_change, |
| .delete = u32_delete, |
| .walk = u32_walk, |
| .dump = u32_dump, |
| .owner = THIS_MODULE, |
| }; |
| |
| static int __init init_u32(void) |
| { |
| printk("u32 classifier\n"); |
| #ifdef CONFIG_CLS_U32_PERF |
| printk(" Performance counters on\n"); |
| #endif |
| #ifdef CONFIG_NET_CLS_IND |
| printk(" input device check on \n"); |
| #endif |
| #ifdef CONFIG_NET_CLS_ACT |
| printk(" Actions configured \n"); |
| #endif |
| return register_tcf_proto_ops(&cls_u32_ops); |
| } |
| |
| static void __exit exit_u32(void) |
| { |
| unregister_tcf_proto_ops(&cls_u32_ops); |
| } |
| |
| module_init(init_u32) |
| module_exit(exit_u32) |
| MODULE_LICENSE("GPL"); |