diff options
Diffstat (limited to 'include/net/pkt_act.h')
| -rw-r--r-- | include/net/pkt_act.h | 275 |
1 files changed, 275 insertions, 0 deletions
diff --git a/include/net/pkt_act.h b/include/net/pkt_act.h new file mode 100644 index 000000000000..bd08964b72c0 --- /dev/null +++ b/include/net/pkt_act.h @@ -0,0 +1,275 @@ +#ifndef __NET_PKT_ACT_H +#define __NET_PKT_ACT_H + +#include <asm/uaccess.h> +#include <asm/system.h> +#include <linux/bitops.h> +#include <linux/config.h> +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/string.h> +#include <linux/mm.h> +#include <linux/socket.h> +#include <linux/sockios.h> +#include <linux/in.h> +#include <linux/errno.h> +#include <linux/interrupt.h> +#include <linux/netdevice.h> +#include <linux/skbuff.h> +#include <linux/rtnetlink.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/proc_fs.h> +#include <net/sock.h> +#include <net/pkt_sched.h> + +#define tca_st(val) (struct tcf_##val *) +#define PRIV(a,name) ( tca_st(name) (a)->priv) + +#if 0 /* control */ +#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args) +#else +#define DPRINTK(format,args...) +#endif + +#if 0 /* data */ +#define D2PRINTK(format,args...) printk(KERN_DEBUG format,##args) +#else +#define D2PRINTK(format,args...) +#endif + +static __inline__ unsigned +tcf_hash(u32 index) +{ + return index & MY_TAB_MASK; +} + +/* probably move this from being inline + * and put into act_generic +*/ +static inline void +tcf_hash_destroy(struct tcf_st *p) +{ + unsigned h = tcf_hash(p->index); + struct tcf_st **p1p; + + for (p1p = &tcf_ht[h]; *p1p; p1p = &(*p1p)->next) { + if (*p1p == p) { + write_lock_bh(&tcf_t_lock); + *p1p = p->next; + write_unlock_bh(&tcf_t_lock); +#ifdef CONFIG_NET_ESTIMATOR + gen_kill_estimator(&p->bstats, &p->rate_est); +#endif + kfree(p); + return; + } + } + BUG_TRAP(0); +} + +static inline int +tcf_hash_release(struct tcf_st *p, int bind ) +{ + int ret = 0; + if (p) { + if (bind) { + p->bindcnt--; + } + p->refcnt--; + if(p->bindcnt <=0 && p->refcnt <= 0) { + tcf_hash_destroy(p); + ret = 1; + } + } + return ret; +} + +static __inline__ int +tcf_dump_walker(struct sk_buff *skb, struct netlink_callback *cb, + struct tc_action *a) +{ + struct tcf_st *p; + int err =0, index = -1,i= 0, s_i = 0, n_i = 0; + struct rtattr *r ; + + read_lock(&tcf_t_lock); + + s_i = cb->args[0]; + + for (i = 0; i < MY_TAB_SIZE; i++) { + p = tcf_ht[tcf_hash(i)]; + + for (; p; p = p->next) { + index++; + if (index < s_i) + continue; + a->priv = p; + a->order = n_i; + r = (struct rtattr*) skb->tail; + RTA_PUT(skb, a->order, 0, NULL); + err = tcf_action_dump_1(skb, a, 0, 0); + if (0 > err) { + index--; + skb_trim(skb, (u8*)r - skb->data); + goto done; + } + r->rta_len = skb->tail - (u8*)r; + n_i++; + if (n_i >= TCA_ACT_MAX_PRIO) { + goto done; + } + } + } +done: + read_unlock(&tcf_t_lock); + if (n_i) + cb->args[0] += n_i; + return n_i; + +rtattr_failure: + skb_trim(skb, (u8*)r - skb->data); + goto done; +} + +static __inline__ int +tcf_del_walker(struct sk_buff *skb, struct tc_action *a) +{ + struct tcf_st *p, *s_p; + struct rtattr *r ; + int i= 0, n_i = 0; + + r = (struct rtattr*) skb->tail; + RTA_PUT(skb, a->order, 0, NULL); + RTA_PUT(skb, TCA_KIND, IFNAMSIZ, a->ops->kind); + for (i = 0; i < MY_TAB_SIZE; i++) { + p = tcf_ht[tcf_hash(i)]; + + while (p != NULL) { + s_p = p->next; + if (ACT_P_DELETED == tcf_hash_release(p, 0)) { + module_put(a->ops->owner); + } + n_i++; + p = s_p; + } + } + RTA_PUT(skb, TCA_FCNT, 4, &n_i); + r->rta_len = skb->tail - (u8*)r; + + return n_i; +rtattr_failure: + skb_trim(skb, (u8*)r - skb->data); + return -EINVAL; +} + +static __inline__ int +tcf_generic_walker(struct sk_buff *skb, struct netlink_callback *cb, int type, + struct tc_action *a) +{ + if (type == RTM_DELACTION) { + return tcf_del_walker(skb,a); + } else if (type == RTM_GETACTION) { + return tcf_dump_walker(skb,cb,a); + } else { + printk("tcf_generic_walker: unknown action %d\n",type); + return -EINVAL; + } +} + +static __inline__ struct tcf_st * +tcf_hash_lookup(u32 index) +{ + struct tcf_st *p; + + read_lock(&tcf_t_lock); + for (p = tcf_ht[tcf_hash(index)]; p; p = p->next) { + if (p->index == index) + break; + } + read_unlock(&tcf_t_lock); + return p; +} + +static __inline__ u32 +tcf_hash_new_index(void) +{ + do { + if (++idx_gen == 0) + idx_gen = 1; + } while (tcf_hash_lookup(idx_gen)); + + return idx_gen; +} + + +static inline int +tcf_hash_search(struct tc_action *a, u32 index) +{ + struct tcf_st *p = tcf_hash_lookup(index); + + if (p != NULL) { + a->priv = p; + return 1; + } + return 0; +} + +#ifdef CONFIG_NET_ACT_INIT +static inline struct tcf_st * +tcf_hash_check(u32 index, struct tc_action *a, int ovr, int bind) +{ + struct tcf_st *p = NULL; + if (index && (p = tcf_hash_lookup(index)) != NULL) { + if (bind) { + p->bindcnt++; + p->refcnt++; + } + a->priv = p; + } + return p; +} + +static inline struct tcf_st * +tcf_hash_create(u32 index, struct rtattr *est, struct tc_action *a, int size, int ovr, int bind) +{ + struct tcf_st *p = NULL; + + p = kmalloc(size, GFP_KERNEL); + if (p == NULL) + return p; + + memset(p, 0, size); + p->refcnt = 1; + + if (bind) { + p->bindcnt = 1; + } + + spin_lock_init(&p->lock); + p->stats_lock = &p->lock; + p->index = index ? : tcf_hash_new_index(); + p->tm.install = jiffies; + p->tm.lastuse = jiffies; +#ifdef CONFIG_NET_ESTIMATOR + if (est) + gen_new_estimator(&p->bstats, &p->rate_est, p->stats_lock, est); +#endif + a->priv = (void *) p; + return p; +} + +static inline void tcf_hash_insert(struct tcf_st *p) +{ + unsigned h = tcf_hash(p->index); + + write_lock_bh(&tcf_t_lock); + p->next = tcf_ht[h]; + tcf_ht[h] = p; + write_unlock_bh(&tcf_t_lock); +} + +#endif + +#endif |