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authorJakub Kicinski <jakub.kicinski@netronome.com>2018-11-07 17:33:37 -0800
committerDavid S. Miller <davem@davemloft.net>2018-11-08 16:19:48 -0800
commitbfaee9113f30abfa1f77ecb5e4a6f53a9d4c690c (patch)
treeb395ad6193d47fcd3f868607d48eece07a6d4ef6
parentnet: sched: set TCQ_F_OFFLOADED flag for MQ (diff)
downloadlinux-dev-bfaee9113f30abfa1f77ecb5e4a6f53a9d4c690c.tar.xz
linux-dev-bfaee9113f30abfa1f77ecb5e4a6f53a9d4c690c.zip
net: sched: add an offload graft helper
Qdisc graft operation of offload-capable qdiscs performs a few extra steps which are identical among all the qdiscs. Add a helper to share this code. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: John Hurley <john.hurley@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--include/net/sch_generic.h12
-rw-r--r--net/sched/sch_api.c29
-rw-r--r--net/sched/sch_prio.c27
3 files changed, 44 insertions, 24 deletions
diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h
index af55c1c4edb1..a8dd1fc141b6 100644
--- a/include/net/sch_generic.h
+++ b/include/net/sch_generic.h
@@ -582,6 +582,10 @@ void qdisc_tree_reduce_backlog(struct Qdisc *qdisc, unsigned int n,
#ifdef CONFIG_NET_SCHED
int qdisc_offload_dump_helper(struct Qdisc *q, enum tc_setup_type type,
void *type_data);
+void qdisc_offload_graft_helper(struct net_device *dev, struct Qdisc *sch,
+ struct Qdisc *new, struct Qdisc *old,
+ enum tc_setup_type type, void *type_data,
+ struct netlink_ext_ack *extack);
#else
static inline int
qdisc_offload_dump_helper(struct Qdisc *q, enum tc_setup_type type,
@@ -590,6 +594,14 @@ qdisc_offload_dump_helper(struct Qdisc *q, enum tc_setup_type type,
q->flags &= ~TCQ_F_OFFLOADED;
return 0;
}
+
+static inline void
+qdisc_offload_graft_helper(struct net_device *dev, struct Qdisc *sch,
+ struct Qdisc *new, struct Qdisc *old,
+ enum tc_setup_type type, void *type_data,
+ struct netlink_ext_ack *extack)
+{
+}
#endif
struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue,
const struct Qdisc_ops *ops,
diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index e534825d3d3a..4b3af41cc1d7 100644
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -831,6 +831,35 @@ int qdisc_offload_dump_helper(struct Qdisc *sch, enum tc_setup_type type,
}
EXPORT_SYMBOL(qdisc_offload_dump_helper);
+void qdisc_offload_graft_helper(struct net_device *dev, struct Qdisc *sch,
+ struct Qdisc *new, struct Qdisc *old,
+ enum tc_setup_type type, void *type_data,
+ struct netlink_ext_ack *extack)
+{
+ bool any_qdisc_is_offloaded;
+ int err;
+
+ if (!tc_can_offload(dev) || !dev->netdev_ops->ndo_setup_tc)
+ return;
+
+ err = dev->netdev_ops->ndo_setup_tc(dev, type, type_data);
+
+ /* Don't report error if the graft is part of destroy operation. */
+ if (!err || !new || new == &noop_qdisc)
+ return;
+
+ /* Don't report error if the parent, the old child and the new
+ * one are not offloaded.
+ */
+ any_qdisc_is_offloaded = new->flags & TCQ_F_OFFLOADED;
+ any_qdisc_is_offloaded |= sch && sch->flags & TCQ_F_OFFLOADED;
+ any_qdisc_is_offloaded |= old && old->flags & TCQ_F_OFFLOADED;
+
+ if (any_qdisc_is_offloaded)
+ NL_SET_ERR_MSG(extack, "Offloading graft operation failed.");
+}
+EXPORT_SYMBOL(qdisc_offload_graft_helper);
+
static int tc_fill_qdisc(struct sk_buff *skb, struct Qdisc *q, u32 clid,
u32 portid, u32 seq, u16 flags, int event)
{
diff --git a/net/sched/sch_prio.c b/net/sched/sch_prio.c
index 4bdd04c30ead..63a90c5055ee 100644
--- a/net/sched/sch_prio.c
+++ b/net/sched/sch_prio.c
@@ -295,43 +295,22 @@ static int prio_graft(struct Qdisc *sch, unsigned long arg, struct Qdisc *new,
{
struct prio_sched_data *q = qdisc_priv(sch);
struct tc_prio_qopt_offload graft_offload;
- struct net_device *dev = qdisc_dev(sch);
unsigned long band = arg - 1;
- bool any_qdisc_is_offloaded;
- int err;
if (new == NULL)
new = &noop_qdisc;
*old = qdisc_replace(sch, new, &q->queues[band]);
- if (!tc_can_offload(dev))
- return 0;
-
graft_offload.handle = sch->handle;
graft_offload.parent = sch->parent;
graft_offload.graft_params.band = band;
graft_offload.graft_params.child_handle = new->handle;
graft_offload.command = TC_PRIO_GRAFT;
- err = dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_QDISC_PRIO,
- &graft_offload);
-
- /* Don't report error if the graft is part of destroy operation. */
- if (err && new != &noop_qdisc) {
- /* Don't report error if the parent, the old child and the new
- * one are not offloaded.
- */
- any_qdisc_is_offloaded = sch->flags & TCQ_F_OFFLOADED;
- any_qdisc_is_offloaded |= new->flags & TCQ_F_OFFLOADED;
- if (*old)
- any_qdisc_is_offloaded |= (*old)->flags &
- TCQ_F_OFFLOADED;
-
- if (any_qdisc_is_offloaded)
- NL_SET_ERR_MSG(extack, "Offloading graft operation failed.");
- }
-
+ qdisc_offload_graft_helper(qdisc_dev(sch), sch, new, *old,
+ TC_SETUP_QDISC_PRIO, &graft_offload,
+ extack);
return 0;
}