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net sched actions: update Add/Delete action API with new argument 

Introduce a new function argument to carry total attributes size for
correct allocation of skb in event messages.

Signed-off-by: Roman Mashak <mrv@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Roman Mashak 2018-03-08 16:59:17 -05:00 committed by David S. Miller
parent 79134e6ce2
commit d04e6990c9
3 changed files with 17 additions and 10 deletions
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3
include/net/act_api.h
View File

@ -166,7 +166,8 @@ int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions,
int nr_actions, struct tcf_result *res);
int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla,
struct nlattr *est, char *name, int ovr, int bind,
struct list_head *actions, struct netlink_ext_ack *extack);
struct list_head *actions, size_t *attr_size,
struct netlink_ext_ack *extack);
struct tc_action *tcf_action_init_1(struct net *net, struct tcf_proto *tp,
struct nlattr *nla, struct nlattr *est,
char *name, int ovr, int bind,

21
net/sched/act_api.c
View File

@ -741,7 +741,8 @@ static void cleanup_a(struct list_head *actions, int ovr)
int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla,
struct nlattr *est, char *name, int ovr, int bind,
struct list_head *actions, struct netlink_ext_ack *extack)
struct list_head *actions, size_t *attr_size,
struct netlink_ext_ack *extack)
{
struct nlattr *tb[TCA_ACT_MAX_PRIO + 1];
struct tc_action *act;
@ -994,12 +995,13 @@ err_out:
static int
tcf_del_notify(struct net *net, struct nlmsghdr *n, struct list_head *actions,
u32 portid, struct netlink_ext_ack *extack)
u32 portid, size_t attr_size, struct netlink_ext_ack *extack)
{
int ret;
struct sk_buff *skb;
skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
skb = alloc_skb(attr_size <= NLMSG_GOODSIZE ? NLMSG_GOODSIZE : attr_size,
GFP_KERNEL);
if (!skb)
return -ENOBUFS;
@ -1032,6 +1034,7 @@ tca_action_gd(struct net *net, struct nlattr *nla, struct nlmsghdr *n,
int i, ret;
struct nlattr *tb[TCA_ACT_MAX_PRIO + 1];
struct tc_action *act;
size_t attr_size = 0;
LIST_HEAD(actions);
ret = nla_parse_nested(tb, TCA_ACT_MAX_PRIO, nla, NULL, extack);
@ -1059,7 +1062,7 @@ tca_action_gd(struct net *net, struct nlattr *nla, struct nlmsghdr *n,
if (event == RTM_GETACTION)
ret = tcf_get_notify(net, portid, n, &actions, event, extack);
else { /* delete */
ret = tcf_del_notify(net, n, &actions, portid, extack);
ret = tcf_del_notify(net, n, &actions, portid, attr_size, extack);
if (ret)
goto err;
return ret;
@ -1072,12 +1075,13 @@ err:
static int
tcf_add_notify(struct net *net, struct nlmsghdr *n, struct list_head *actions,
u32 portid, struct netlink_ext_ack *extack)
u32 portid, size_t attr_size, struct netlink_ext_ack *extack)
{
struct sk_buff *skb;
int err = 0;
skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
skb = alloc_skb(attr_size <= NLMSG_GOODSIZE ? NLMSG_GOODSIZE : attr_size,
GFP_KERNEL);
if (!skb)
return -ENOBUFS;
@ -1099,15 +1103,16 @@ static int tcf_action_add(struct net *net, struct nlattr *nla,
struct nlmsghdr *n, u32 portid, int ovr,
struct netlink_ext_ack *extack)
{
size_t attr_size = 0;
int ret = 0;
LIST_HEAD(actions);
ret = tcf_action_init(net, NULL, nla, NULL, NULL, ovr, 0, &actions,
extack);
&attr_size, extack);
if (ret)
return ret;
return tcf_add_notify(net, n, &actions, portid, extack);
return tcf_add_notify(net, n, &actions, portid, attr_size, extack);
}
static u32 tcaa_root_flags_allowed = TCA_FLAG_LARGE_DUMP_ON;

3
net/sched/cls_api.c
View File

@ -1433,6 +1433,7 @@ int tcf_exts_validate(struct net *net, struct tcf_proto *tp, struct nlattr **tb,
#ifdef CONFIG_NET_CLS_ACT
{
struct tc_action *act;
size_t attr_size = 0;
if (exts->police && tb[exts->police]) {
act = tcf_action_init_1(net, tp, tb[exts->police],
@ -1450,7 +1451,7 @@ int tcf_exts_validate(struct net *net, struct tcf_proto *tp, struct nlattr **tb,
err = tcf_action_init(net, tp, tb[exts->action],
rate_tlv, NULL, ovr, TCA_ACT_BIND,
&actions, extack);
&actions, &attr_size, extack);
if (err)
return err;
list_for_each_entry(act, &actions, list)