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-rw-r--r--net/sched/act_api.c253
1 files changed, 229 insertions, 24 deletions
diff --git a/net/sched/act_api.c b/net/sched/act_api.c
index a2587b52e53..835070e9169 100644
--- a/net/sched/act_api.c
+++ b/net/sched/act_api.c
@@ -33,16 +33,230 @@
#include <net/sch_generic.h>
#include <net/act_api.h>
-#if 0 /* control */
-#define DPRINTK(format, args...) printk(KERN_DEBUG format, ##args)
-#else
-#define DPRINTK(format, args...)
+void tcf_hash_destroy(struct tcf_common *p, struct tcf_hashinfo *hinfo)
+{
+ unsigned int h = tcf_hash(p->tcfc_index, hinfo->hmask);
+ struct tcf_common **p1p;
+
+ for (p1p = &hinfo->htab[h]; *p1p; p1p = &(*p1p)->tcfc_next) {
+ if (*p1p == p) {
+ write_lock_bh(hinfo->lock);
+ *p1p = p->tcfc_next;
+ write_unlock_bh(hinfo->lock);
+#ifdef CONFIG_NET_ESTIMATOR
+ gen_kill_estimator(&p->tcfc_bstats,
+ &p->tcfc_rate_est);
#endif
-#if 0 /* data */
-#define D2PRINTK(format, args...) printk(KERN_DEBUG format, ##args)
-#else
-#define D2PRINTK(format, args...)
+ kfree(p);
+ return;
+ }
+ }
+ BUG_TRAP(0);
+}
+EXPORT_SYMBOL(tcf_hash_destroy);
+
+int tcf_hash_release(struct tcf_common *p, int bind,
+ struct tcf_hashinfo *hinfo)
+{
+ int ret = 0;
+
+ if (p) {
+ if (bind)
+ p->tcfc_bindcnt--;
+
+ p->tcfc_refcnt--;
+ if (p->tcfc_bindcnt <= 0 && p->tcfc_refcnt <= 0) {
+ tcf_hash_destroy(p, hinfo);
+ ret = 1;
+ }
+ }
+ return ret;
+}
+EXPORT_SYMBOL(tcf_hash_release);
+
+static int tcf_dump_walker(struct sk_buff *skb, struct netlink_callback *cb,
+ struct tc_action *a, struct tcf_hashinfo *hinfo)
+{
+ struct tcf_common *p;
+ int err = 0, index = -1,i = 0, s_i = 0, n_i = 0;
+ struct rtattr *r ;
+
+ read_lock(hinfo->lock);
+
+ s_i = cb->args[0];
+
+ for (i = 0; i < (hinfo->hmask + 1); i++) {
+ p = hinfo->htab[tcf_hash(i, hinfo->hmask)];
+
+ for (; p; p = p->tcfc_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 (err < 0) {
+ 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(hinfo->lock);
+ if (n_i)
+ cb->args[0] += n_i;
+ return n_i;
+
+rtattr_failure:
+ skb_trim(skb, (u8*)r - skb->data);
+ goto done;
+}
+
+static int tcf_del_walker(struct sk_buff *skb, struct tc_action *a,
+ struct tcf_hashinfo *hinfo)
+{
+ struct tcf_common *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 < (hinfo->hmask + 1); i++) {
+ p = hinfo->htab[tcf_hash(i, hinfo->hmask)];
+
+ while (p != NULL) {
+ s_p = p->tcfc_next;
+ if (ACT_P_DELETED == tcf_hash_release(p, 0, hinfo))
+ 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;
+}
+
+int tcf_generic_walker(struct sk_buff *skb, struct netlink_callback *cb,
+ int type, struct tc_action *a)
+{
+ struct tcf_hashinfo *hinfo = a->ops->hinfo;
+
+ if (type == RTM_DELACTION) {
+ return tcf_del_walker(skb, a, hinfo);
+ } else if (type == RTM_GETACTION) {
+ return tcf_dump_walker(skb, cb, a, hinfo);
+ } else {
+ printk("tcf_generic_walker: unknown action %d\n", type);
+ return -EINVAL;
+ }
+}
+EXPORT_SYMBOL(tcf_generic_walker);
+
+struct tcf_common *tcf_hash_lookup(u32 index, struct tcf_hashinfo *hinfo)
+{
+ struct tcf_common *p;
+
+ read_lock(hinfo->lock);
+ for (p = hinfo->htab[tcf_hash(index, hinfo->hmask)]; p;
+ p = p->tcfc_next) {
+ if (p->tcfc_index == index)
+ break;
+ }
+ read_unlock(hinfo->lock);
+
+ return p;
+}
+EXPORT_SYMBOL(tcf_hash_lookup);
+
+u32 tcf_hash_new_index(u32 *idx_gen, struct tcf_hashinfo *hinfo)
+{
+ u32 val = *idx_gen;
+
+ do {
+ if (++val == 0)
+ val = 1;
+ } while (tcf_hash_lookup(val, hinfo));
+
+ return (*idx_gen = val);
+}
+EXPORT_SYMBOL(tcf_hash_new_index);
+
+int tcf_hash_search(struct tc_action *a, u32 index)
+{
+ struct tcf_hashinfo *hinfo = a->ops->hinfo;
+ struct tcf_common *p = tcf_hash_lookup(index, hinfo);
+
+ if (p) {
+ a->priv = p;
+ return 1;
+ }
+ return 0;
+}
+EXPORT_SYMBOL(tcf_hash_search);
+
+struct tcf_common *tcf_hash_check(u32 index, struct tc_action *a, int bind,
+ struct tcf_hashinfo *hinfo)
+{
+ struct tcf_common *p = NULL;
+ if (index && (p = tcf_hash_lookup(index, hinfo)) != NULL) {
+ if (bind) {
+ p->tcfc_bindcnt++;
+ p->tcfc_refcnt++;
+ }
+ a->priv = p;
+ }
+ return p;
+}
+EXPORT_SYMBOL(tcf_hash_check);
+
+struct tcf_common *tcf_hash_create(u32 index, struct rtattr *est, struct tc_action *a, int size, int bind, u32 *idx_gen, struct tcf_hashinfo *hinfo)
+{
+ struct tcf_common *p = kzalloc(size, GFP_KERNEL);
+
+ if (unlikely(!p))
+ return p;
+ p->tcfc_refcnt = 1;
+ if (bind)
+ p->tcfc_bindcnt = 1;
+
+ spin_lock_init(&p->tcfc_lock);
+ p->tcfc_stats_lock = &p->tcfc_lock;
+ p->tcfc_index = index ? index : tcf_hash_new_index(idx_gen, hinfo);
+ p->tcfc_tm.install = jiffies;
+ p->tcfc_tm.lastuse = jiffies;
+#ifdef CONFIG_NET_ESTIMATOR
+ if (est)
+ gen_new_estimator(&p->tcfc_bstats, &p->tcfc_rate_est,
+ p->tcfc_stats_lock, est);
#endif
+ a->priv = (void *) p;
+ return p;
+}
+EXPORT_SYMBOL(tcf_hash_create);
+
+void tcf_hash_insert(struct tcf_common *p, struct tcf_hashinfo *hinfo)
+{
+ unsigned int h = tcf_hash(p->tcfc_index, hinfo->hmask);
+
+ write_lock_bh(hinfo->lock);
+ p->tcfc_next = hinfo->htab[h];
+ hinfo->htab[h] = p;
+ write_unlock_bh(hinfo->lock);
+}
+EXPORT_SYMBOL(tcf_hash_insert);
static struct tc_action_ops *act_base = NULL;
static DEFINE_RWLOCK(act_mod_lock);
@@ -155,9 +369,6 @@ int tcf_action_exec(struct sk_buff *skb, struct tc_action *act,
if (skb->tc_verd & TC_NCLS) {
skb->tc_verd = CLR_TC_NCLS(skb->tc_verd);
- D2PRINTK("(%p)tcf_action_exec: cleared TC_NCLS in %s out %s\n",
- skb, skb->input_dev ? skb->input_dev->name : "xxx",
- skb->dev->name);
ret = TC_ACT_OK;
goto exec_done;
}
@@ -187,8 +398,6 @@ void tcf_action_destroy(struct tc_action *act, int bind)
for (a = act; a; a = act) {
if (a->ops && a->ops->cleanup) {
- DPRINTK("tcf_action_destroy destroying %p next %p\n",
- a, a->next);
if (a->ops->cleanup(a, bind) == ACT_P_DELETED)
module_put(a->ops->owner);
act = act->next;
@@ -331,7 +540,6 @@ struct tc_action *tcf_action_init_1(struct rtattr *rta, struct rtattr *est,
if (*err != ACT_P_CREATED)
module_put(a_o->owner);
a->ops = a_o;
- DPRINTK("tcf_action_init_1: successfull %s\n", act_name);
*err = 0;
return a;
@@ -392,12 +600,12 @@ int tcf_action_copy_stats(struct sk_buff *skb, struct tc_action *a,
if (compat_mode) {
if (a->type == TCA_OLD_COMPAT)
err = gnet_stats_start_copy_compat(skb, 0,
- TCA_STATS, TCA_XSTATS, h->stats_lock, &d);
+ TCA_STATS, TCA_XSTATS, h->tcf_stats_lock, &d);
else
return 0;
} else
err = gnet_stats_start_copy(skb, TCA_ACT_STATS,
- h->stats_lock, &d);
+ h->tcf_stats_lock, &d);
if (err < 0)
goto errout;
@@ -406,11 +614,11 @@ int tcf_action_copy_stats(struct sk_buff *skb, struct tc_action *a,
if (a->ops->get_stats(skb, a) < 0)
goto errout;
- if (gnet_stats_copy_basic(&d, &h->bstats) < 0 ||
+ if (gnet_stats_copy_basic(&d, &h->tcf_bstats) < 0 ||
#ifdef CONFIG_NET_ESTIMATOR
- gnet_stats_copy_rate_est(&d, &h->rate_est) < 0 ||
+ gnet_stats_copy_rate_est(&d, &h->tcf_rate_est) < 0 ||
#endif
- gnet_stats_copy_queue(&d, &h->qstats) < 0)
+ gnet_stats_copy_queue(&d, &h->tcf_qstats) < 0)
goto errout;
if (gnet_stats_finish_copy(&d) < 0)
@@ -459,7 +667,6 @@ static int
act_get_notify(u32 pid, struct nlmsghdr *n, struct tc_action *a, int event)
{
struct sk_buff *skb;
- int err = 0;
skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
if (!skb)
@@ -468,10 +675,8 @@ act_get_notify(u32 pid, struct nlmsghdr *n, struct tc_action *a, int event)
kfree_skb(skb);
return -EINVAL;
}
- err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
- if (err > 0)
- err = 0;
- return err;
+
+ return rtnl_unicast(skb, pid);
}
static struct tc_action *
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-21 19:20:50 +0000