| Message ID | 1386913673-8210-4-git-send-email-xiyou.wangcong@gmail.com |
|---|---|
| State | Superseded, archived |
| Delegated to: | David Miller |
| Headers | show |
On 12/13/13 00:47, Cong Wang wrote: > When the target device is removed, the mirred action is > still there but with the dev pointer setting to NULL. > This makes the output from 'tc filter' ugly. There is no > reason to keep it. > > Cc: Jamal Hadi Salim <jhs@mojatatu.com> > Cc: David S. Miller <davem@davemloft.net> > Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> > --- > include/net/tc_act/tc_mirred.h | 4 +++- > net/sched/act_mirred.c | 15 +++++++-------- > 2 files changed, 10 insertions(+), 9 deletions(-) > > diff --git a/include/net/tc_act/tc_mirred.h b/include/net/tc_act/tc_mirred.h > index cfe2943..2026cf6 100644 > --- a/include/net/tc_act/tc_mirred.h > +++ b/include/net/tc_act/tc_mirred.h > @@ -7,9 +7,11 @@ struct tcf_mirred { > struct tcf_common common; > int tcfm_eaction; > int tcfm_ifindex; > - int tcfm_ok_push; > + unsigned int tcfm_ok_push:1; > + unsigned int tcfm_bind:1; What has the above cleverness got to do with anything you intended? cheers, jamal -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
> From: Jamal Hadi Salim > Sent: 13 December 2013 12:08 ... > > - int tcfm_ok_push; > > + unsigned int tcfm_ok_push:1; > > + unsigned int tcfm_bind:1; > > What has the above cleverness got to do with anything you intended? Not even 'cleverness'. Using byte-sized fields is enough to stop the structure growing. Bit fields are usually not a good idea at all. David -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Fri, Dec 13, 2013 at 4:12 AM, David Laight <David.Laight@aculab.com> wrote: >> From: Jamal Hadi Salim >> Sent: 13 December 2013 12:08 > ... >> > - int tcfm_ok_push; >> > + unsigned int tcfm_ok_push:1; >> > + unsigned int tcfm_bind:1; >> >> What has the above cleverness got to do with anything you intended? > > Not even 'cleverness'. > Using byte-sized fields is enough to stop the structure growing. > Bit fields are usually not a good idea at all. > They are both boolean, I think it is a waste to use 'int' for both of them. I am not a fan of bit fields though. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/include/net/tc_act/tc_mirred.h b/include/net/tc_act/tc_mirred.h index cfe2943..2026cf6 100644 --- a/include/net/tc_act/tc_mirred.h +++ b/include/net/tc_act/tc_mirred.h @@ -7,9 +7,11 @@ struct tcf_mirred { struct tcf_common common; int tcfm_eaction; int tcfm_ifindex; - int tcfm_ok_push; + unsigned int tcfm_ok_push:1; + unsigned int tcfm_bind:1; struct net_device *tcfm_dev; struct list_head tcfm_list; + struct tc_action *tcfm_act; }; #define to_mirred(pc) \ container_of(pc, struct tcf_mirred, common) diff --git a/net/sched/act_mirred.c b/net/sched/act_mirred.c index 2523781..c26bfe5 100644 --- a/net/sched/act_mirred.c +++ b/net/sched/act_mirred.c @@ -136,6 +136,8 @@ static int tcf_mirred_init(struct net *net, struct nlattr *nla, dev_hold(dev); m->tcfm_dev = dev; m->tcfm_ok_push = ok_push; + m->tcfm_bind = bind; + m->tcfm_act = a; } spin_unlock_bh(&m->tcf_lock); if (ret == ACT_P_CREATED) { @@ -169,10 +171,6 @@ static int tcf_mirred(struct sk_buff *skb, const struct tc_action *a, bstats_update(&m->tcf_bstats, skb); dev = m->tcfm_dev; - if (!dev) { - printk_once(KERN_NOTICE "tc mirred: target device is gone\n"); - goto out; - } if (!(dev->flags & IFF_UP)) { net_notice_ratelimited("tc mirred to Houston: device %s is down\n", @@ -244,13 +242,14 @@ static int mirred_device_event(struct notifier_block *unused, unsigned long event, void *ptr) { struct net_device *dev = netdev_notifier_info_to_dev(ptr); - struct tcf_mirred *m; + struct tcf_mirred *m, *tmp; if (event == NETDEV_UNREGISTER) - list_for_each_entry(m, &mirred_list, tcfm_list) { + list_for_each_entry_safe(m, tmp, &mirred_list, tcfm_list) { if (m->tcfm_dev == dev) { - dev_put(dev); - m->tcfm_dev = NULL; + list_del(&m->tcfm_act->list); + tcf_mirred_cleanup(m->tcfm_act, m->tcfm_bind); + kfree(m->tcfm_act); } }
When the target device is removed, the mirred action is still there but with the dev pointer setting to NULL. This makes the output from 'tc filter' ugly. There is no reason to keep it. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> --- include/net/tc_act/tc_mirred.h | 4 +++- net/sched/act_mirred.c | 15 +++++++-------- 2 files changed, 10 insertions(+), 9 deletions(-)