Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 | #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/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
|