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authorVlad Buslov <vladbu@mellanox.com>2018-09-24 19:22:55 +0300
committerDavid S. Miller <davem@davemloft.net>2018-09-25 20:17:36 -0700
commitf00234367b64503d2436bb3d0f37bbe98ac2cc97 (patch)
tree5db1b5875f9b62359f413150df1df870dbc2136c /net/sched/cls_api.c
parentnet: sched: change tcf block reference counter type to refcount_t (diff)
downloadlinux-dev-f00234367b64503d2436bb3d0f37bbe98ac2cc97.tar.xz
linux-dev-f00234367b64503d2436bb3d0f37bbe98ac2cc97.zip
net: sched: implement functions to put and flush all chains
Extract code that flushes and puts all chains on tcf block to two standalone function to be shared with functions that locklessly get/put reference to block. Signed-off-by: Vlad Buslov <vladbu@mellanox.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/cls_api.c')
-rw-r--r--net/sched/cls_api.c55
1 files changed, 30 insertions, 25 deletions
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index 90843b6a8fa9..cb7422af5e51 100644
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -527,6 +527,31 @@ static struct tcf_block *tcf_block_lookup(struct net *net, u32 block_index)
return idr_find(&tn->idr, block_index);
}
+static void tcf_block_flush_all_chains(struct tcf_block *block)
+{
+ struct tcf_chain *chain;
+
+ /* Hold a refcnt for all chains, so that they don't disappear
+ * while we are iterating.
+ */
+ list_for_each_entry(chain, &block->chain_list, list)
+ tcf_chain_hold(chain);
+
+ list_for_each_entry(chain, &block->chain_list, list)
+ tcf_chain_flush(chain);
+}
+
+static void tcf_block_put_all_chains(struct tcf_block *block)
+{
+ struct tcf_chain *chain, *tmp;
+
+ /* At this point, all the chains should have refcnt >= 1. */
+ list_for_each_entry_safe(chain, tmp, &block->chain_list, list) {
+ tcf_chain_put_explicitly_created(chain);
+ tcf_chain_put(chain);
+ }
+}
+
/* Find tcf block.
* Set q, parent, cl when appropriate.
*/
@@ -786,8 +811,6 @@ EXPORT_SYMBOL(tcf_block_get);
void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q,
struct tcf_block_ext_info *ei)
{
- struct tcf_chain *chain, *tmp;
-
if (!block)
return;
tcf_chain0_head_change_cb_del(block, ei);
@@ -804,32 +827,14 @@ void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q,
if (tcf_block_shared(block))
tcf_block_remove(block, block->net);
-
- if (!free_block) {
- /* Hold a refcnt for all chains, so that they don't
- * disappear while we are iterating.
- */
- list_for_each_entry(chain, &block->chain_list, list)
- tcf_chain_hold(chain);
-
- list_for_each_entry(chain, &block->chain_list, list)
- tcf_chain_flush(chain);
- }
-
+ if (!free_block)
+ tcf_block_flush_all_chains(block);
tcf_block_offload_unbind(block, q, ei);
- if (free_block) {
+ if (free_block)
kfree(block);
- } else {
- /* At this point, all the chains should have
- * refcnt >= 1.
- */
- list_for_each_entry_safe(chain, tmp, &block->chain_list,
- list) {
- tcf_chain_put_explicitly_created(chain);
- tcf_chain_put(chain);
- }
- }
+ else
+ tcf_block_put_all_chains(block);
} else {
tcf_block_offload_unbind(block, q, ei);
}