From: Vladimir Oltean Date: Fri, 7 Apr 2023 14:14:51 +0000 (+0300) Subject: net: dsa: add trace points for VLAN operations X-Git-Tag: v6.6.7~2736^2~139^2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=02020bd70fa6abcb1c2a8525ce7c1500dd4f44a8;p=platform%2Fkernel%2Flinux-starfive.git net: dsa: add trace points for VLAN operations These are not as critical as the FDB/MDB trace points (I'm not aware of outstanding VLAN related bugs), but maybe they are useful to somebody, either debugging something or simply trying to learn more. Signed-off-by: Vladimir Oltean Signed-off-by: David S. Miller --- diff --git a/net/dsa/switch.c b/net/dsa/switch.c index ff1b5d9..8c9a9f9 100644 --- a/net/dsa/switch.c +++ b/net/dsa/switch.c @@ -695,8 +695,12 @@ static int dsa_port_do_vlan_add(struct dsa_port *dp, int err = 0; /* No need to bother with refcounting for user ports. */ - if (!(dsa_port_is_cpu(dp) || dsa_port_is_dsa(dp))) - return ds->ops->port_vlan_add(ds, port, vlan, extack); + if (!(dsa_port_is_cpu(dp) || dsa_port_is_dsa(dp))) { + err = ds->ops->port_vlan_add(ds, port, vlan, extack); + trace_dsa_vlan_add_hw(dp, vlan, err); + + return err; + } /* No need to propagate on shared ports the existing VLANs that were * re-notified after just the flags have changed. This would cause a @@ -711,6 +715,7 @@ static int dsa_port_do_vlan_add(struct dsa_port *dp, v = dsa_vlan_find(&dp->vlans, vlan); if (v) { refcount_inc(&v->refcount); + trace_dsa_vlan_add_bump(dp, vlan, &v->refcount); goto out; } @@ -721,6 +726,7 @@ static int dsa_port_do_vlan_add(struct dsa_port *dp, } err = ds->ops->port_vlan_add(ds, port, vlan, extack); + trace_dsa_vlan_add_hw(dp, vlan, err); if (err) { kfree(v); goto out; @@ -745,21 +751,29 @@ static int dsa_port_do_vlan_del(struct dsa_port *dp, int err = 0; /* No need to bother with refcounting for user ports */ - if (!(dsa_port_is_cpu(dp) || dsa_port_is_dsa(dp))) - return ds->ops->port_vlan_del(ds, port, vlan); + if (!(dsa_port_is_cpu(dp) || dsa_port_is_dsa(dp))) { + err = ds->ops->port_vlan_del(ds, port, vlan); + trace_dsa_vlan_del_hw(dp, vlan, err); + + return err; + } mutex_lock(&dp->vlans_lock); v = dsa_vlan_find(&dp->vlans, vlan); if (!v) { + trace_dsa_vlan_del_not_found(dp, vlan); err = -ENOENT; goto out; } - if (!refcount_dec_and_test(&v->refcount)) + if (!refcount_dec_and_test(&v->refcount)) { + trace_dsa_vlan_del_drop(dp, vlan, &v->refcount); goto out; + } err = ds->ops->port_vlan_del(ds, port, vlan); + trace_dsa_vlan_del_hw(dp, vlan, err); if (err) { refcount_set(&v->refcount, 1); goto out; diff --git a/net/dsa/trace.h b/net/dsa/trace.h index 42c8bbc..567f29a 100644 --- a/net/dsa/trace.h +++ b/net/dsa/trace.h @@ -9,7 +9,9 @@ #define _NET_DSA_TRACE_H #include +#include #include +#include #include #include @@ -318,6 +320,122 @@ TRACE_EVENT(dsa_lag_fdb_del_not_found, __get_str(dev), __entry->addr, __entry->vid, __entry->db_buf) ); +DECLARE_EVENT_CLASS(dsa_vlan_op_hw, + + TP_PROTO(const struct dsa_port *dp, + const struct switchdev_obj_port_vlan *vlan, int err), + + TP_ARGS(dp, vlan, err), + + TP_STRUCT__entry( + __string(dev, dev_name(dp->ds->dev)) + __string(kind, dsa_port_kind(dp)) + __field(int, port) + __field(u16, vid) + __field(u16, flags) + __field(bool, changed) + __field(int, err) + ), + + TP_fast_assign( + __assign_str(dev, dev_name(dp->ds->dev)); + __assign_str(kind, dsa_port_kind(dp)); + __entry->port = dp->index; + __entry->vid = vlan->vid; + __entry->flags = vlan->flags; + __entry->changed = vlan->changed; + __entry->err = err; + ), + + TP_printk("%s %s port %d vid %u%s%s%s", + __get_str(dev), __get_str(kind), __entry->port, __entry->vid, + __entry->flags & BRIDGE_VLAN_INFO_PVID ? " pvid" : "", + __entry->flags & BRIDGE_VLAN_INFO_UNTAGGED ? " untagged" : "", + __entry->changed ? " (changed)" : "") +); + +DEFINE_EVENT(dsa_vlan_op_hw, dsa_vlan_add_hw, + TP_PROTO(const struct dsa_port *dp, + const struct switchdev_obj_port_vlan *vlan, int err), + TP_ARGS(dp, vlan, err)); + +DEFINE_EVENT(dsa_vlan_op_hw, dsa_vlan_del_hw, + TP_PROTO(const struct dsa_port *dp, + const struct switchdev_obj_port_vlan *vlan, int err), + TP_ARGS(dp, vlan, err)); + +DECLARE_EVENT_CLASS(dsa_vlan_op_refcount, + + TP_PROTO(const struct dsa_port *dp, + const struct switchdev_obj_port_vlan *vlan, + const refcount_t *refcount), + + TP_ARGS(dp, vlan, refcount), + + TP_STRUCT__entry( + __string(dev, dev_name(dp->ds->dev)) + __string(kind, dsa_port_kind(dp)) + __field(int, port) + __field(u16, vid) + __field(u16, flags) + __field(bool, changed) + __field(unsigned int, refcount) + ), + + TP_fast_assign( + __assign_str(dev, dev_name(dp->ds->dev)); + __assign_str(kind, dsa_port_kind(dp)); + __entry->port = dp->index; + __entry->vid = vlan->vid; + __entry->flags = vlan->flags; + __entry->changed = vlan->changed; + __entry->refcount = refcount_read(refcount); + ), + + TP_printk("%s %s port %d vid %u%s%s%s refcount %u", + __get_str(dev), __get_str(kind), __entry->port, __entry->vid, + __entry->flags & BRIDGE_VLAN_INFO_PVID ? " pvid" : "", + __entry->flags & BRIDGE_VLAN_INFO_UNTAGGED ? " untagged" : "", + __entry->changed ? " (changed)" : "", __entry->refcount) +); + +DEFINE_EVENT(dsa_vlan_op_refcount, dsa_vlan_add_bump, + TP_PROTO(const struct dsa_port *dp, + const struct switchdev_obj_port_vlan *vlan, + const refcount_t *refcount), + TP_ARGS(dp, vlan, refcount)); + +DEFINE_EVENT(dsa_vlan_op_refcount, dsa_vlan_del_drop, + TP_PROTO(const struct dsa_port *dp, + const struct switchdev_obj_port_vlan *vlan, + const refcount_t *refcount), + TP_ARGS(dp, vlan, refcount)); + +TRACE_EVENT(dsa_vlan_del_not_found, + + TP_PROTO(const struct dsa_port *dp, + const struct switchdev_obj_port_vlan *vlan), + + TP_ARGS(dp, vlan), + + TP_STRUCT__entry( + __string(dev, dev_name(dp->ds->dev)) + __string(kind, dsa_port_kind(dp)) + __field(int, port) + __field(u16, vid) + ), + + TP_fast_assign( + __assign_str(dev, dev_name(dp->ds->dev)); + __assign_str(kind, dsa_port_kind(dp)); + __entry->port = dp->index; + __entry->vid = vlan->vid; + ), + + TP_printk("%s %s port %d vid %u", + __get_str(dev), __get_str(kind), __entry->port, __entry->vid) +); + #endif /* _NET_DSA_TRACE_H */ /* We don't want to use include/trace/events */