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