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| author | Jesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com> | 2017-10-16 18:01:25 -0700 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2017-10-27 09:41:50 -0700 |
| commit | 0f7787b4133fb26b6dc0779e4867408e07711d8e (patch) | |
| tree | 26b789f79df24ec6539f414722f22ede3280f494 /net/sched/sch_mqprio.c | |
| parent | ce8a75f60b75831947569229616cf1bc94f2d965 (diff) | |
| download | linux-0f7787b4133fb26b6dc0779e4867408e07711d8e.tar.bz2 | |
net/sched: Add select_queue() class_ops for mqprio
When replacing a child qdisc from mqprio, tc_modify_qdisc() must fetch
the netdev_queue pointer that the current child qdisc is associated
with before creating the new qdisc.
Currently, when using mqprio as root qdisc, the kernel will end up
getting the queue #0 pointer from the mqprio (root qdisc), which leaves
any new child qdisc with a possibly wrong netdev_queue pointer.
Implementing the Qdisc_class_ops select_queue() on mqprio fixes this
issue and avoid an inconsistent state when child qdiscs are replaced.
Signed-off-by: Jesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com>
Tested-by: Henrik Austad <henrik@austad.us>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'net/sched/sch_mqprio.c')
| -rw-r--r-- | net/sched/sch_mqprio.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/net/sched/sch_mqprio.c b/net/sched/sch_mqprio.c index 51c2b289c69b..4d5ed45123f0 100644 --- a/net/sched/sch_mqprio.c +++ b/net/sched/sch_mqprio.c @@ -575,6 +575,12 @@ static void mqprio_walk(struct Qdisc *sch, struct qdisc_walker *arg) } } +static struct netdev_queue *mqprio_select_queue(struct Qdisc *sch, + struct tcmsg *tcm) +{ + return mqprio_queue_get(sch, TC_H_MIN(tcm->tcm_parent)); +} + static const struct Qdisc_class_ops mqprio_class_ops = { .graft = mqprio_graft, .leaf = mqprio_leaf, @@ -582,6 +588,7 @@ static const struct Qdisc_class_ops mqprio_class_ops = { .walk = mqprio_walk, .dump = mqprio_dump_class, .dump_stats = mqprio_dump_class_stats, + .select_queue = mqprio_select_queue, }; static struct Qdisc_ops mqprio_qdisc_ops __read_mostly = { |