diff mbox series

[net-next,v2,01/18] net/sched: sch_api: add helper for tc qdisc walker stats dump

Message ID 20220917050217.127342-1-shaozhengchao@huawei.com (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series refactor duplicate codes in the qdisc class walk function | expand

Checks

Context Check Description
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Series has a cover letter
netdev/patch_count fail Series longer than 15 patches (and no cover letter)
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 81 this patch: 81
netdev/cc_maintainers success CCed 8 of 8 maintainers
netdev/build_clang success Errors and warnings before: 11 this patch: 11
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 95 this patch: 95
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 17 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

shaozhengchao Sept. 17, 2022, 5:02 a.m. UTC
The walk implementation of most qdisc class modules is basically the
same. That is, the values of count and skip are checked first. If
count is greater than or equal to skip, the registered fn function is
executed. Otherwise, increase the value of count. So we can reconstruct
them.

Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
---
 include/net/pkt_sched.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

Comments

Toke Høiland-Jørgensen Sept. 20, 2022, 1:45 p.m. UTC | #1
Zhengchao Shao <shaozhengchao@huawei.com> writes:

> The walk implementation of most qdisc class modules is basically the
> same. That is, the values of count and skip are checked first. If
> count is greater than or equal to skip, the registered fn function is
> executed. Otherwise, increase the value of count. So we can reconstruct
> them.
>
> Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
> ---
>  include/net/pkt_sched.h | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
>
> diff --git a/include/net/pkt_sched.h b/include/net/pkt_sched.h
> index 29f65632ebc5..243e8b0cb7ea 100644
> --- a/include/net/pkt_sched.h
> +++ b/include/net/pkt_sched.h
> @@ -222,4 +222,17 @@ static inline struct tc_skb_cb *tc_skb_cb(const struct sk_buff *skb)
>  	return cb;
>  }
>  
> +static inline bool tc_qdisc_stats_dump(struct Qdisc *sch,
> +				       struct qdisc_walker *arg,
> +				       unsigned long cl)
> +{
> +	if (arg->count >= arg->skip && arg->fn(sch, cl, arg) < 0) {

Seems a bit confusing that tc_qdisc_stats_dump() reverses the order of
the 'cl' and 'arg' parameters relative to the callback?

-Toke
diff mbox series

Patch

diff --git a/include/net/pkt_sched.h b/include/net/pkt_sched.h
index 29f65632ebc5..243e8b0cb7ea 100644
--- a/include/net/pkt_sched.h
+++ b/include/net/pkt_sched.h
@@ -222,4 +222,17 @@  static inline struct tc_skb_cb *tc_skb_cb(const struct sk_buff *skb)
 	return cb;
 }
 
+static inline bool tc_qdisc_stats_dump(struct Qdisc *sch,
+				       struct qdisc_walker *arg,
+				       unsigned long cl)
+{
+	if (arg->count >= arg->skip && arg->fn(sch, cl, arg) < 0) {
+		arg->stop = 1;
+		return false;
+	}
+
+	arg->count++;
+	return true;
+}
+
 #endif