diff options
| author | Eric Dumazet <edumazet@google.com> | 2026-04-30 05:36:28 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-05-01 06:54:27 +0300 |
| commit | 6f63b829632cbb4e7c4b6c55c79f5bb6652c06a8 (patch) | |
| tree | 6f7deb5ae2ac1f8ce18b479ecd712dfa48edcafe | |
| parent | 748bbef5fc6a6f5931103b68b67d345c67d0850b (diff) | |
| download | linux-6f63b829632cbb4e7c4b6c55c79f5bb6652c06a8.tar.xz | |
net/sched: speedup tc_dump_qdisc() when tcm_ifindex is provided
There is no point dumping qdiscs for all devices when user space
wants them for a single device:
tc -s -d qdisc show dev eth1
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20260430023628.3216283-5-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | net/sched/sch_api.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c index cf3d01dd6b26..dd0edc9bd461 100644 --- a/net/sched/sch_api.c +++ b/net/sched/sch_api.c @@ -1884,6 +1884,7 @@ static int tc_dump_qdisc(struct sk_buff *skb, struct netlink_callback *cb) unsigned long ifindex; int q_idx; } *ctx = (void *)cb->ctx; + const struct tcmsg *tcm; struct net_device *dev; int s_q_idx, q_idx; int err; @@ -1894,6 +1895,9 @@ static int tc_dump_qdisc(struct sk_buff *skb, struct netlink_callback *cb) rtm_tca_policy, cb->extack); if (err < 0) return err; + tcm = nlmsg_data(nlh); + if (tcm->tcm_ifindex && !ctx->ifindex) + ctx->ifindex = tcm->tcm_ifindex; s_q_idx = ctx->q_idx; @@ -1901,6 +1905,9 @@ static int tc_dump_qdisc(struct sk_buff *skb, struct netlink_callback *cb) struct netdev_queue *dev_queue; struct Qdisc *q; + if (tcm->tcm_ifindex && ctx->ifindex != tcm->tcm_ifindex) + break; + q_idx = 0; netdev_lock_ops(dev); |