X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=net%2Fsched%2Fact_simple.c;h=5fe80854ca91cdf58d766c66ce1c8fccb8d882a2;hb=refs%2Fheads%2Fvserver;hp=e5f2e1f431e2a36d92ed5c8c4263b8fcefbd44fd;hpb=76828883507a47dae78837ab5dec5a5b4513c667;p=linux-2.6.git diff --git a/net/sched/act_simple.c b/net/sched/act_simple.c index e5f2e1f43..5fe80854c 100644 --- a/net/sched/act_simple.c +++ b/net/sched/act_simple.c @@ -10,7 +10,6 @@ * */ -#include #include #include #include @@ -21,54 +20,174 @@ #define TCA_ACT_SIMP 22 -/* XXX: Hide all these common elements under some macro - * probably -*/ #include #include -/* use generic hash table with 8 buckets */ -#define MY_TAB_SIZE 8 -#define MY_TAB_MASK (MY_TAB_SIZE - 1) -static u32 idx_gen; -static struct tcf_defact *tcf_simp_ht[MY_TAB_SIZE]; +#define SIMP_TAB_MASK 7 +static struct tcf_common *tcf_simp_ht[SIMP_TAB_MASK + 1]; +static u32 simp_idx_gen; static DEFINE_RWLOCK(simp_lock); -/* override the defaults */ -#define tcf_st tcf_defact -#define tc_st tc_defact -#define tcf_t_lock simp_lock -#define tcf_ht tcf_simp_ht - -#define CONFIG_NET_ACT_INIT 1 -#include -#include +static struct tcf_hashinfo simp_hash_info = { + .htab = tcf_simp_ht, + .hmask = SIMP_TAB_MASK, + .lock = &simp_lock, +}; static int tcf_simp(struct sk_buff *skb, struct tc_action *a, struct tcf_result *res) { - struct tcf_defact *p = PRIV(a, defact); + struct tcf_defact *d = a->priv; - spin_lock(&p->lock); - p->tm.lastuse = jiffies; - p->bstats.bytes += skb->len; - p->bstats.packets++; + spin_lock(&d->tcf_lock); + d->tcf_tm.lastuse = jiffies; + d->tcf_bstats.bytes += skb->len; + d->tcf_bstats.packets++; /* print policy string followed by _ then packet count * Example if this was the 3rd packet and the string was "hello" * then it would look like "hello_3" (without quotes) **/ - printk("simple: %s_%d\n", (char *)p->defdata, p->bstats.packets); - spin_unlock(&p->lock); - return p->action; + printk("simple: %s_%d\n", + (char *)d->tcfd_defdata, d->tcf_bstats.packets); + spin_unlock(&d->tcf_lock); + return d->tcf_action; +} + +static int tcf_simp_release(struct tcf_defact *d, int bind) +{ + int ret = 0; + if (d) { + if (bind) + d->tcf_bindcnt--; + d->tcf_refcnt--; + if (d->tcf_bindcnt <= 0 && d->tcf_refcnt <= 0) { + kfree(d->tcfd_defdata); + tcf_hash_destroy(&d->common, &simp_hash_info); + ret = 1; + } + } + return ret; +} + +static int alloc_defdata(struct tcf_defact *d, u32 datalen, void *defdata) +{ + d->tcfd_defdata = kmemdup(defdata, datalen, GFP_KERNEL); + if (unlikely(!d->tcfd_defdata)) + return -ENOMEM; + d->tcfd_datalen = datalen; + return 0; +} + +static int realloc_defdata(struct tcf_defact *d, u32 datalen, void *defdata) +{ + kfree(d->tcfd_defdata); + return alloc_defdata(d, datalen, defdata); +} + +static int tcf_simp_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 *d; + struct tcf_common *pc; + 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; + + pc = tcf_hash_check(parm->index, a, bind, &simp_hash_info); + if (!pc) { + pc = tcf_hash_create(parm->index, est, a, sizeof(*d), bind, + &simp_idx_gen, &simp_hash_info); + if (unlikely(!pc)) + return -ENOMEM; + + d = to_defact(pc); + ret = alloc_defdata(d, datalen, defdata); + if (ret < 0) { + kfree(pc); + return ret; + } + ret = ACT_P_CREATED; + } else { + d = to_defact(pc); + if (!ovr) { + tcf_simp_release(d, bind); + return -EEXIST; + } + realloc_defdata(d, datalen, defdata); + } + + spin_lock_bh(&d->tcf_lock); + d->tcf_action = parm->action; + spin_unlock_bh(&d->tcf_lock); + + if (ret == ACT_P_CREATED) + tcf_hash_insert(pc, &simp_hash_info); + return ret; +} + +static inline int tcf_simp_cleanup(struct tc_action *a, int bind) +{ + struct tcf_defact *d = a->priv; + + if (d) + return tcf_simp_release(d, bind); + return 0; +} + +static inline int tcf_simp_dump(struct sk_buff *skb, struct tc_action *a, + int bind, int ref) +{ + unsigned char *b = skb->tail; + struct tcf_defact *d = a->priv; + struct tc_defact opt; + struct tcf_t t; + + opt.index = d->tcf_index; + opt.refcnt = d->tcf_refcnt - ref; + opt.bindcnt = d->tcf_bindcnt - bind; + opt.action = d->tcf_action; + RTA_PUT(skb, TCA_DEF_PARMS, sizeof(opt), &opt); + RTA_PUT(skb, TCA_DEF_DATA, d->tcfd_datalen, d->tcfd_defdata); + t.install = jiffies_to_clock_t(jiffies - d->tcf_tm.install); + t.lastuse = jiffies_to_clock_t(jiffies - d->tcf_tm.lastuse); + t.expires = jiffies_to_clock_t(d->tcf_tm.expires); + RTA_PUT(skb, TCA_DEF_TM, sizeof(t), &t); + return skb->len; + +rtattr_failure: + skb_trim(skb, b - skb->data); + return -1; } static struct tc_action_ops act_simp_ops = { - .kind = "simple", - .type = TCA_ACT_SIMP, - .capab = TCA_CAP_NONE, - .owner = THIS_MODULE, - .act = tcf_simp, - tca_use_default_ops + .kind = "simple", + .hinfo = &simp_hash_info, + .type = TCA_ACT_SIMP, + .capab = TCA_CAP_NONE, + .owner = THIS_MODULE, + .act = tcf_simp, + .dump = tcf_simp_dump, + .cleanup = tcf_simp_cleanup, + .init = tcf_simp_init, + .walk = tcf_generic_walker, }; MODULE_AUTHOR("Jamal Hadi Salim(2005)");