143 lines
3.2 KiB
C
143 lines
3.2 KiB
C
/*
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* include/net/act_generic.h
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*
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*/
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#ifndef _NET_ACT_GENERIC_H
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#define _NET_ACT_GENERIC_H
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static inline int tcf_defact_release(struct tcf_defact *p, int bind)
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{
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int ret = 0;
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if (p) {
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if (bind) {
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p->bindcnt--;
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}
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p->refcnt--;
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if (p->bindcnt <= 0 && p->refcnt <= 0) {
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kfree(p->defdata);
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tcf_hash_destroy(p);
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ret = 1;
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}
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}
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return ret;
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}
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static inline int
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alloc_defdata(struct tcf_defact *p, u32 datalen, void *defdata)
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{
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p->defdata = kmalloc(datalen, GFP_KERNEL);
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if (p->defdata == NULL)
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return -ENOMEM;
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p->datalen = datalen;
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memcpy(p->defdata, defdata, datalen);
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return 0;
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}
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static inline int
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realloc_defdata(struct tcf_defact *p, u32 datalen, void *defdata)
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{
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/* safer to be just brute force for now */
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kfree(p->defdata);
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return alloc_defdata(p, datalen, defdata);
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}
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static inline int
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tcf_defact_init(struct rtattr *rta, struct rtattr *est,
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struct tc_action *a, int ovr, int bind)
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{
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struct rtattr *tb[TCA_DEF_MAX];
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struct tc_defact *parm;
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struct tcf_defact *p;
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void *defdata;
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u32 datalen = 0;
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int ret = 0;
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if (rta == NULL || rtattr_parse_nested(tb, TCA_DEF_MAX, rta) < 0)
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return -EINVAL;
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if (tb[TCA_DEF_PARMS - 1] == NULL ||
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RTA_PAYLOAD(tb[TCA_DEF_PARMS - 1]) < sizeof(*parm))
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return -EINVAL;
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parm = RTA_DATA(tb[TCA_DEF_PARMS - 1]);
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defdata = RTA_DATA(tb[TCA_DEF_DATA - 1]);
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if (defdata == NULL)
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return -EINVAL;
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datalen = RTA_PAYLOAD(tb[TCA_DEF_DATA - 1]);
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if (datalen <= 0)
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return -EINVAL;
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p = tcf_hash_check(parm->index, a, ovr, bind);
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if (p == NULL) {
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p = tcf_hash_create(parm->index, est, a, sizeof(*p), ovr, bind);
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if (p == NULL)
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return -ENOMEM;
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ret = alloc_defdata(p, datalen, defdata);
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if (ret < 0) {
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kfree(p);
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return ret;
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}
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ret = ACT_P_CREATED;
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} else {
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if (!ovr) {
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tcf_defact_release(p, bind);
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return -EEXIST;
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}
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realloc_defdata(p, datalen, defdata);
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}
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spin_lock_bh(&p->lock);
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p->action = parm->action;
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spin_unlock_bh(&p->lock);
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if (ret == ACT_P_CREATED)
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tcf_hash_insert(p);
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return ret;
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}
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static inline int tcf_defact_cleanup(struct tc_action *a, int bind)
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{
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struct tcf_defact *p = PRIV(a, defact);
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if (p != NULL)
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return tcf_defact_release(p, bind);
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return 0;
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}
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static inline int
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tcf_defact_dump(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
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{
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unsigned char *b = skb->tail;
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struct tc_defact opt;
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struct tcf_defact *p = PRIV(a, defact);
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struct tcf_t t;
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opt.index = p->index;
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opt.refcnt = p->refcnt - ref;
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opt.bindcnt = p->bindcnt - bind;
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opt.action = p->action;
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RTA_PUT(skb, TCA_DEF_PARMS, sizeof(opt), &opt);
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RTA_PUT(skb, TCA_DEF_DATA, p->datalen, p->defdata);
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t.install = jiffies_to_clock_t(jiffies - p->tm.install);
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t.lastuse = jiffies_to_clock_t(jiffies - p->tm.lastuse);
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t.expires = jiffies_to_clock_t(p->tm.expires);
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RTA_PUT(skb, TCA_DEF_TM, sizeof(t), &t);
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return skb->len;
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rtattr_failure:
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skb_trim(skb, b - skb->data);
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return -1;
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}
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#define tca_use_default_ops \
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.dump = tcf_defact_dump, \
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.cleanup = tcf_defact_cleanup, \
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.init = tcf_defact_init, \
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.walk = tcf_generic_walker, \
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#define tca_use_default_defines(name) \
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static u32 idx_gen; \
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static struct tcf_defact *tcf_##name_ht[MY_TAB_SIZE]; \
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static DEFINE_RWLOCK(##name_lock);
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#endif /* _NET_ACT_GENERIC_H */
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