Message ID | 20190820223259.22348-25-willy@infradead.org |
---|---|
State | Changes Requested |
Delegated to: | David Miller |
Headers | show |
Series | Convert networking to use the XArray | expand |
On Tue, 20 Aug 2019 15:32:45 -0700, Matthew Wilcox wrote: > @@ -305,8 +306,12 @@ static void *u32_get(struct tcf_proto *tp, u32 handle) > /* Protected by rtnl lock */ > static u32 gen_new_htid(struct tc_u_common *tp_c, struct tc_u_hnode *ptr) > { > - int id = idr_alloc_cyclic(&tp_c->handle_idr, ptr, 1, 0x7FF, GFP_KERNEL); > - if (id < 0) > + int err; > + u32 id; > + > + err = xa_alloc_cyclic(&tp_c->ht_xa, &id, ptr, XA_LIMIT(0, 0x7ff), > + &tp_c->ht_next, GFP_KERNEL); nit: indentation seems off here and a couple of other places.
On Wed, Aug 21, 2019 at 02:13:08PM -0700, Jakub Kicinski wrote: > On Tue, 20 Aug 2019 15:32:45 -0700, Matthew Wilcox wrote: > > @@ -305,8 +306,12 @@ static void *u32_get(struct tcf_proto *tp, u32 handle) > > /* Protected by rtnl lock */ > > static u32 gen_new_htid(struct tc_u_common *tp_c, struct tc_u_hnode *ptr) > > { > > - int id = idr_alloc_cyclic(&tp_c->handle_idr, ptr, 1, 0x7FF, GFP_KERNEL); > > - if (id < 0) > > + int err; > > + u32 id; > > + > > + err = xa_alloc_cyclic(&tp_c->ht_xa, &id, ptr, XA_LIMIT(0, 0x7ff), > > + &tp_c->ht_next, GFP_KERNEL); > > nit: indentation seems off here and a couple of other places. what indentation rule does the networking stack use? i just leave the cursor where my editor puts it, which seems to be two tabs.
On Wed, 21 Aug 2019 14:25:42 -0700, Matthew Wilcox wrote: > On Wed, Aug 21, 2019 at 02:13:08PM -0700, Jakub Kicinski wrote: > > On Tue, 20 Aug 2019 15:32:45 -0700, Matthew Wilcox wrote: > > > @@ -305,8 +306,12 @@ static void *u32_get(struct tcf_proto *tp, u32 handle) > > > /* Protected by rtnl lock */ > > > static u32 gen_new_htid(struct tc_u_common *tp_c, struct tc_u_hnode *ptr) > > > { > > > - int id = idr_alloc_cyclic(&tp_c->handle_idr, ptr, 1, 0x7FF, GFP_KERNEL); > > > - if (id < 0) > > > + int err; > > > + u32 id; > > > + > > > + err = xa_alloc_cyclic(&tp_c->ht_xa, &id, ptr, XA_LIMIT(0, 0x7ff), > > > + &tp_c->ht_next, GFP_KERNEL); > > > > nit: indentation seems off here and a couple of other places. > > what indentation rule does the networking stack use? i just leave the > cursor where my editor puts it, which seems to be two tabs. Oh, match opening bracket.. err = xa_alloc_cyclic(&tp_c->ht_xa, &id, ptr, XA_LIMIT(0, 0x7ff), &tp_c->ht_next, GFP_KERNEL);
diff --git a/net/sched/cls_u32.c b/net/sched/cls_u32.c index 8614088edd1b..18ef5f375976 100644 --- a/net/sched/cls_u32.c +++ b/net/sched/cls_u32.c @@ -86,7 +86,8 @@ struct tc_u_common { struct tc_u_hnode __rcu *hlist; void *ptr; int refcnt; - struct idr handle_idr; + u32 ht_next; + struct xarray ht_xa; struct hlist_node hnode; long knodes; }; @@ -305,8 +306,12 @@ static void *u32_get(struct tcf_proto *tp, u32 handle) /* Protected by rtnl lock */ static u32 gen_new_htid(struct tc_u_common *tp_c, struct tc_u_hnode *ptr) { - int id = idr_alloc_cyclic(&tp_c->handle_idr, ptr, 1, 0x7FF, GFP_KERNEL); - if (id < 0) + int err; + u32 id; + + err = xa_alloc_cyclic(&tp_c->ht_xa, &id, ptr, XA_LIMIT(0, 0x7ff), + &tp_c->ht_next, GFP_KERNEL); + if (err < 0) return 0; return (id | 0x800U) << 20; } @@ -371,8 +376,7 @@ static int u32_init(struct tcf_proto *tp) } tp_c->ptr = key; INIT_HLIST_NODE(&tp_c->hnode); - idr_init(&tp_c->handle_idr); - + xa_init_flags(&tp_c->ht_xa, XA_FLAGS_ALLOC1); hlist_add_head(&tp_c->hnode, tc_u_hash(key)); } @@ -608,7 +612,7 @@ static int u32_destroy_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht, if (phn == ht) { u32_clear_hw_hnode(tp, ht, extack); idr_destroy(&ht->handle_idr); - idr_remove(&tp_c->handle_idr, ht->handle); + xa_erase(&tp_c->ht_xa, ht->handle); RCU_INIT_POINTER(*hn, ht->next); kfree_rcu(ht, rcu); return 0; @@ -645,7 +649,6 @@ static void u32_destroy(struct tcf_proto *tp, bool rtnl_held, kfree_rcu(ht, rcu); } - idr_destroy(&tp_c->handle_idr); kfree(tp_c); } @@ -950,8 +953,7 @@ static int u32_change(struct net *net, struct sk_buff *in_skb, return -ENOMEM; } } else { - err = idr_alloc_u32(&tp_c->handle_idr, ht, &handle, - handle, GFP_KERNEL); + err = xa_insert(&tp_c->ht_xa, handle, ht, GFP_KERNEL); if (err) { kfree(ht); return err; @@ -966,7 +968,7 @@ static int u32_change(struct net *net, struct sk_buff *in_skb, err = u32_replace_hw_hnode(tp, ht, flags, extack); if (err) { - idr_remove(&tp_c->handle_idr, handle); + xa_erase(&tp_c->ht_xa, handle); kfree(ht); return err; }