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Merge branch 'net-sched-couple-of-fixes'

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Jiri Pirko says:

====================
net: sched: couple of fixes

This patchset contains couple of fixes following-up the shared block
patchsets.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2018-02-13 12:29:03 -05:00
commit f7219bf311
2 changed files with 32 additions and 18 deletions
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26
net/sched/cls_api.c
View File

@ -376,17 +376,12 @@ struct tcf_net {
static unsigned int tcf_net_id;
static int tcf_block_insert(struct tcf_block *block, struct net *net,
u32 block_index, struct netlink_ext_ack *extack)
struct netlink_ext_ack *extack)
{
struct tcf_net *tn = net_generic(net, tcf_net_id);
int err;
err = idr_alloc_u32(&tn->idr, block, &block_index, block_index,
GFP_KERNEL);
if (err)
return err;
block->index = block_index;
return 0;
return idr_alloc_u32(&tn->idr, block, &block->index, block->index,
GFP_KERNEL);
}
static void tcf_block_remove(struct tcf_block *block, struct net *net)
@ -397,6 +392,7 @@ static void tcf_block_remove(struct tcf_block *block, struct net *net)
}
static struct tcf_block *tcf_block_create(struct net *net, struct Qdisc *q,
u32 block_index,
struct netlink_ext_ack *extack)
{
struct tcf_block *block;
@ -419,10 +415,13 @@ static struct tcf_block *tcf_block_create(struct net *net, struct Qdisc *q,
err = -ENOMEM;
goto err_chain_create;
}
block->net = qdisc_net(q);
block->refcnt = 1;
block->net = net;
block->q = q;
block->index = block_index;
/* Don't store q pointer for blocks which are shared */
if (!tcf_block_shared(block))
block->q = q;
return block;
err_chain_create:
@ -518,13 +517,12 @@ int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q,
}
if (!block) {
block = tcf_block_create(net, q, extack);
block = tcf_block_create(net, q, ei->block_index, extack);
if (IS_ERR(block))
return PTR_ERR(block);
created = true;
if (ei->block_index) {
err = tcf_block_insert(block, net,
ei->block_index, extack);
if (tcf_block_shared(block)) {
err = tcf_block_insert(block, net, extack);
if (err)
goto err_block_insert;
}

24
net/sched/cls_u32.c
View File

@ -96,7 +96,7 @@ struct tc_u_hnode {
struct tc_u_common {
struct tc_u_hnode __rcu *hlist;
struct tcf_block *block;
void *ptr;
int refcnt;
struct idr handle_idr;
struct hlist_node hnode;
@ -330,9 +330,25 @@ static struct hlist_head *tc_u_common_hash;
#define U32_HASH_SHIFT 10
#define U32_HASH_SIZE (1 << U32_HASH_SHIFT)
static void *tc_u_common_ptr(const struct tcf_proto *tp)
{
struct tcf_block *block = tp->chain->block;
/* The block sharing is currently supported only
* for classless qdiscs. In that case we use block
* for tc_u_common identification. In case the
* block is not shared, block->q is a valid pointer
* and we can use that. That works for classful qdiscs.
*/
if (tcf_block_shared(block))
return block;
else
return block->q;
}
static unsigned int tc_u_hash(const struct tcf_proto *tp)
{
return hash_ptr(tp->chain->block, U32_HASH_SHIFT);
return hash_ptr(tc_u_common_ptr(tp), U32_HASH_SHIFT);
}
static struct tc_u_common *tc_u_common_find(const struct tcf_proto *tp)
@ -342,7 +358,7 @@ static struct tc_u_common *tc_u_common_find(const struct tcf_proto *tp)
h = tc_u_hash(tp);
hlist_for_each_entry(tc, &tc_u_common_hash[h], hnode) {
if (tc->block == tp->chain->block)
if (tc->ptr == tc_u_common_ptr(tp))
return tc;
}
return NULL;
@ -371,7 +387,7 @@ static int u32_init(struct tcf_proto *tp)
kfree(root_ht);
return -ENOBUFS;
}
tp_c->block = tp->chain->block;
tp_c->ptr = tc_u_common_ptr(tp);
INIT_HLIST_NODE(&tp_c->hnode);
idr_init(&tp_c->handle_idr);