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Message-Id: <20200529002541.19743-9-pablo@netfilter.org>
Date: Fri, 29 May 2020 02:25:41 +0200
From: Pablo Neira Ayuso <pablo@...filter.org>
To: netfilter-devel@...r.kernel.org
Cc: davem@...emloft.net, netdev@...r.kernel.org, paulb@...lanox.com,
ozsh@...lanox.com, vladbu@...lanox.com, jiri@...nulli.us,
kuba@...nel.org, saeedm@...lanox.com, michael.chan@...adcom.com,
sriharsha.basavapatna@...adcom.com
Subject: [PATCH net-next 8/8] net: remove indirect block netdev event registration
Drivers do not register to netdev events to set up indirect blocks
anymore. Remove __flow_indr_block_cb_register() and
__flow_indr_block_cb_unregister().
The frontends set up the callbacks through flow_indr_dev_setup_block()
Signed-off-by: Pablo Neira Ayuso <pablo@...filter.org>
---
include/net/flow_offload.h | 9 -
net/core/flow_offload.c | 238 --------------------------
net/netfilter/nf_flow_table_offload.c | 66 -------
net/netfilter/nf_tables_offload.c | 53 +-----
net/sched/cls_api.c | 79 ---------
5 files changed, 1 insertion(+), 444 deletions(-)
diff --git a/include/net/flow_offload.h b/include/net/flow_offload.h
index 5493282348fa..69e13c8b6b3a 100644
--- a/include/net/flow_offload.h
+++ b/include/net/flow_offload.h
@@ -546,15 +546,6 @@ typedef void flow_indr_block_cmd_t(struct net_device *dev,
flow_indr_block_bind_cb_t *cb, void *cb_priv,
enum flow_block_command command);
-struct flow_indr_block_entry {
- flow_indr_block_cmd_t *cb;
- struct list_head list;
-};
-
-void flow_indr_add_block_cb(struct flow_indr_block_entry *entry);
-
-void flow_indr_del_block_cb(struct flow_indr_block_entry *entry);
-
int __flow_indr_block_cb_register(struct net_device *dev, void *cb_priv,
flow_indr_block_bind_cb_t *cb,
void *cb_ident);
diff --git a/net/core/flow_offload.c b/net/core/flow_offload.c
index 8cd7da2586ae..0cfc35e6be28 100644
--- a/net/core/flow_offload.c
+++ b/net/core/flow_offload.c
@@ -473,241 +473,3 @@ int flow_indr_dev_setup_offload(struct net_device *dev,
return list_empty(&bo->cb_list) ? -EOPNOTSUPP : 0;
}
EXPORT_SYMBOL(flow_indr_dev_setup_offload);
-
-static LIST_HEAD(block_cb_list);
-
-static struct rhashtable indr_setup_block_ht;
-
-struct flow_indr_block_cb {
- struct list_head list;
- void *cb_priv;
- flow_indr_block_bind_cb_t *cb;
- void *cb_ident;
-};
-
-struct flow_indr_block_dev {
- struct rhash_head ht_node;
- struct net_device *dev;
- unsigned int refcnt;
- struct list_head cb_list;
-};
-
-static const struct rhashtable_params flow_indr_setup_block_ht_params = {
- .key_offset = offsetof(struct flow_indr_block_dev, dev),
- .head_offset = offsetof(struct flow_indr_block_dev, ht_node),
- .key_len = sizeof(struct net_device *),
-};
-
-static struct flow_indr_block_dev *
-flow_indr_block_dev_lookup(struct net_device *dev)
-{
- return rhashtable_lookup_fast(&indr_setup_block_ht, &dev,
- flow_indr_setup_block_ht_params);
-}
-
-static struct flow_indr_block_dev *
-flow_indr_block_dev_get(struct net_device *dev)
-{
- struct flow_indr_block_dev *indr_dev;
-
- indr_dev = flow_indr_block_dev_lookup(dev);
- if (indr_dev)
- goto inc_ref;
-
- indr_dev = kzalloc(sizeof(*indr_dev), GFP_KERNEL);
- if (!indr_dev)
- return NULL;
-
- INIT_LIST_HEAD(&indr_dev->cb_list);
- indr_dev->dev = dev;
- if (rhashtable_insert_fast(&indr_setup_block_ht, &indr_dev->ht_node,
- flow_indr_setup_block_ht_params)) {
- kfree(indr_dev);
- return NULL;
- }
-
-inc_ref:
- indr_dev->refcnt++;
- return indr_dev;
-}
-
-static void flow_indr_block_dev_put(struct flow_indr_block_dev *indr_dev)
-{
- if (--indr_dev->refcnt)
- return;
-
- rhashtable_remove_fast(&indr_setup_block_ht, &indr_dev->ht_node,
- flow_indr_setup_block_ht_params);
- kfree(indr_dev);
-}
-
-static struct flow_indr_block_cb *
-flow_indr_block_cb_lookup(struct flow_indr_block_dev *indr_dev,
- flow_indr_block_bind_cb_t *cb, void *cb_ident)
-{
- struct flow_indr_block_cb *indr_block_cb;
-
- list_for_each_entry(indr_block_cb, &indr_dev->cb_list, list)
- if (indr_block_cb->cb == cb &&
- indr_block_cb->cb_ident == cb_ident)
- return indr_block_cb;
- return NULL;
-}
-
-static struct flow_indr_block_cb *
-flow_indr_block_cb_add(struct flow_indr_block_dev *indr_dev, void *cb_priv,
- flow_indr_block_bind_cb_t *cb, void *cb_ident)
-{
- struct flow_indr_block_cb *indr_block_cb;
-
- indr_block_cb = flow_indr_block_cb_lookup(indr_dev, cb, cb_ident);
- if (indr_block_cb)
- return ERR_PTR(-EEXIST);
-
- indr_block_cb = kzalloc(sizeof(*indr_block_cb), GFP_KERNEL);
- if (!indr_block_cb)
- return ERR_PTR(-ENOMEM);
-
- indr_block_cb->cb_priv = cb_priv;
- indr_block_cb->cb = cb;
- indr_block_cb->cb_ident = cb_ident;
- list_add(&indr_block_cb->list, &indr_dev->cb_list);
-
- return indr_block_cb;
-}
-
-static void flow_indr_block_cb_del(struct flow_indr_block_cb *indr_block_cb)
-{
- list_del(&indr_block_cb->list);
- kfree(indr_block_cb);
-}
-
-static DEFINE_MUTEX(flow_indr_block_cb_lock);
-
-static void flow_block_cmd(struct net_device *dev,
- flow_indr_block_bind_cb_t *cb, void *cb_priv,
- enum flow_block_command command)
-{
- struct flow_indr_block_entry *entry;
-
- mutex_lock(&flow_indr_block_cb_lock);
- list_for_each_entry(entry, &block_cb_list, list) {
- entry->cb(dev, cb, cb_priv, command);
- }
- mutex_unlock(&flow_indr_block_cb_lock);
-}
-
-int __flow_indr_block_cb_register(struct net_device *dev, void *cb_priv,
- flow_indr_block_bind_cb_t *cb,
- void *cb_ident)
-{
- struct flow_indr_block_cb *indr_block_cb;
- struct flow_indr_block_dev *indr_dev;
- int err;
-
- indr_dev = flow_indr_block_dev_get(dev);
- if (!indr_dev)
- return -ENOMEM;
-
- indr_block_cb = flow_indr_block_cb_add(indr_dev, cb_priv, cb, cb_ident);
- err = PTR_ERR_OR_ZERO(indr_block_cb);
- if (err)
- goto err_dev_put;
-
- flow_block_cmd(dev, indr_block_cb->cb, indr_block_cb->cb_priv,
- FLOW_BLOCK_BIND);
-
- return 0;
-
-err_dev_put:
- flow_indr_block_dev_put(indr_dev);
- return err;
-}
-EXPORT_SYMBOL_GPL(__flow_indr_block_cb_register);
-
-int flow_indr_block_cb_register(struct net_device *dev, void *cb_priv,
- flow_indr_block_bind_cb_t *cb,
- void *cb_ident)
-{
- int err;
-
- rtnl_lock();
- err = __flow_indr_block_cb_register(dev, cb_priv, cb, cb_ident);
- rtnl_unlock();
-
- return err;
-}
-EXPORT_SYMBOL_GPL(flow_indr_block_cb_register);
-
-void __flow_indr_block_cb_unregister(struct net_device *dev,
- flow_indr_block_bind_cb_t *cb,
- void *cb_ident)
-{
- struct flow_indr_block_cb *indr_block_cb;
- struct flow_indr_block_dev *indr_dev;
-
- indr_dev = flow_indr_block_dev_lookup(dev);
- if (!indr_dev)
- return;
-
- indr_block_cb = flow_indr_block_cb_lookup(indr_dev, cb, cb_ident);
- if (!indr_block_cb)
- return;
-
- flow_block_cmd(dev, indr_block_cb->cb, indr_block_cb->cb_priv,
- FLOW_BLOCK_UNBIND);
-
- flow_indr_block_cb_del(indr_block_cb);
- flow_indr_block_dev_put(indr_dev);
-}
-EXPORT_SYMBOL_GPL(__flow_indr_block_cb_unregister);
-
-void flow_indr_block_cb_unregister(struct net_device *dev,
- flow_indr_block_bind_cb_t *cb,
- void *cb_ident)
-{
- rtnl_lock();
- __flow_indr_block_cb_unregister(dev, cb, cb_ident);
- rtnl_unlock();
-}
-EXPORT_SYMBOL_GPL(flow_indr_block_cb_unregister);
-
-void flow_indr_block_call(struct net_device *dev,
- struct flow_block_offload *bo,
- enum flow_block_command command,
- enum tc_setup_type type)
-{
- struct flow_indr_block_cb *indr_block_cb;
- struct flow_indr_block_dev *indr_dev;
-
- indr_dev = flow_indr_block_dev_lookup(dev);
- if (!indr_dev)
- return;
-
- list_for_each_entry(indr_block_cb, &indr_dev->cb_list, list)
- indr_block_cb->cb(dev, indr_block_cb->cb_priv, type, bo);
-}
-EXPORT_SYMBOL_GPL(flow_indr_block_call);
-
-void flow_indr_add_block_cb(struct flow_indr_block_entry *entry)
-{
- mutex_lock(&flow_indr_block_cb_lock);
- list_add_tail(&entry->list, &block_cb_list);
- mutex_unlock(&flow_indr_block_cb_lock);
-}
-EXPORT_SYMBOL_GPL(flow_indr_add_block_cb);
-
-void flow_indr_del_block_cb(struct flow_indr_block_entry *entry)
-{
- mutex_lock(&flow_indr_block_cb_lock);
- list_del(&entry->list);
- mutex_unlock(&flow_indr_block_cb_lock);
-}
-EXPORT_SYMBOL_GPL(flow_indr_del_block_cb);
-
-static int __init init_flow_indr_rhashtable(void)
-{
- return rhashtable_init(&indr_setup_block_ht,
- &flow_indr_setup_block_ht_params);
-}
-subsys_initcall(init_flow_indr_rhashtable);
diff --git a/net/netfilter/nf_flow_table_offload.c b/net/netfilter/nf_flow_table_offload.c
index 01cfa02c43bd..62651e6683f6 100644
--- a/net/netfilter/nf_flow_table_offload.c
+++ b/net/netfilter/nf_flow_table_offload.c
@@ -1008,69 +1008,6 @@ int nf_flow_table_offload_setup(struct nf_flowtable *flowtable,
}
EXPORT_SYMBOL_GPL(nf_flow_table_offload_setup);
-static void nf_flow_table_indr_block_ing_cmd(struct net_device *dev,
- struct nf_flowtable *flowtable,
- flow_indr_block_bind_cb_t *cb,
- void *cb_priv,
- enum flow_block_command cmd)
-{
- struct netlink_ext_ack extack = {};
- struct flow_block_offload bo;
-
- if (!flowtable)
- return;
-
- nf_flow_table_block_offload_init(&bo, dev_net(dev), cmd, flowtable,
- &extack);
-
- cb(dev, cb_priv, TC_SETUP_FT, &bo);
-
- nf_flow_table_block_setup(flowtable, &bo, cmd);
-}
-
-static void nf_flow_table_indr_block_cb_cmd(struct nf_flowtable *flowtable,
- struct net_device *dev,
- flow_indr_block_bind_cb_t *cb,
- void *cb_priv,
- enum flow_block_command cmd)
-{
- if (!(flowtable->flags & NF_FLOWTABLE_HW_OFFLOAD))
- return;
-
- nf_flow_table_indr_block_ing_cmd(dev, flowtable, cb, cb_priv, cmd);
-}
-
-static void nf_flow_table_indr_block_cb(struct net_device *dev,
- flow_indr_block_bind_cb_t *cb,
- void *cb_priv,
- enum flow_block_command cmd)
-{
- struct net *net = dev_net(dev);
- struct nft_flowtable *nft_ft;
- struct nft_table *table;
- struct nft_hook *hook;
-
- mutex_lock(&net->nft.commit_mutex);
- list_for_each_entry(table, &net->nft.tables, list) {
- list_for_each_entry(nft_ft, &table->flowtables, list) {
- list_for_each_entry(hook, &nft_ft->hook_list, list) {
- if (hook->ops.dev != dev)
- continue;
-
- nf_flow_table_indr_block_cb_cmd(&nft_ft->data,
- dev, cb,
- cb_priv, cmd);
- }
- }
- }
- mutex_unlock(&net->nft.commit_mutex);
-}
-
-static struct flow_indr_block_entry block_ing_entry = {
- .cb = nf_flow_table_indr_block_cb,
- .list = LIST_HEAD_INIT(block_ing_entry.list),
-};
-
int nf_flow_table_offload_init(void)
{
nf_flow_offload_wq = alloc_workqueue("nf_flow_table_offload",
@@ -1078,13 +1015,10 @@ int nf_flow_table_offload_init(void)
if (!nf_flow_offload_wq)
return -ENOMEM;
- flow_indr_add_block_cb(&block_ing_entry);
-
return 0;
}
void nf_flow_table_offload_exit(void)
{
- flow_indr_del_block_cb(&block_ing_entry);
destroy_workqueue(nf_flow_offload_wq);
}
diff --git a/net/netfilter/nf_tables_offload.c b/net/netfilter/nf_tables_offload.c
index 1960f11477e8..185fc82c99aa 100644
--- a/net/netfilter/nf_tables_offload.c
+++ b/net/netfilter/nf_tables_offload.c
@@ -285,25 +285,6 @@ static int nft_block_offload_cmd(struct nft_base_chain *chain,
return nft_block_setup(chain, &bo, cmd);
}
-static void nft_indr_block_ing_cmd(struct net_device *dev,
- struct nft_base_chain *chain,
- flow_indr_block_bind_cb_t *cb,
- void *cb_priv,
- enum flow_block_command cmd)
-{
- struct netlink_ext_ack extack = {};
- struct flow_block_offload bo;
-
- if (!chain)
- return;
-
- nft_flow_block_offload_init(&bo, dev_net(dev), cmd, chain, &extack);
-
- cb(dev, cb_priv, TC_SETUP_BLOCK, &bo);
-
- nft_block_setup(chain, &bo, cmd);
-}
-
static void nft_indr_block_cleanup(struct flow_block_cb *block_cb)
{
struct nft_base_chain *basechain = block_cb->indr.data;
@@ -575,24 +556,6 @@ static struct nft_chain *__nft_offload_get_chain(struct net_device *dev)
return NULL;
}
-static void nft_indr_block_cb(struct net_device *dev,
- flow_indr_block_bind_cb_t *cb, void *cb_priv,
- enum flow_block_command cmd)
-{
- struct net *net = dev_net(dev);
- struct nft_chain *chain;
-
- mutex_lock(&net->nft.commit_mutex);
- chain = __nft_offload_get_chain(dev);
- if (chain && chain->flags & NFT_CHAIN_HW_OFFLOAD) {
- struct nft_base_chain *basechain;
-
- basechain = nft_base_chain(chain);
- nft_indr_block_ing_cmd(dev, basechain, cb, cb_priv, cmd);
- }
- mutex_unlock(&net->nft.commit_mutex);
-}
-
static int nft_offload_netdev_event(struct notifier_block *this,
unsigned long event, void *ptr)
{
@@ -614,30 +577,16 @@ static int nft_offload_netdev_event(struct notifier_block *this,
return NOTIFY_DONE;
}
-static struct flow_indr_block_entry block_ing_entry = {
- .cb = nft_indr_block_cb,
- .list = LIST_HEAD_INIT(block_ing_entry.list),
-};
-
static struct notifier_block nft_offload_netdev_notifier = {
.notifier_call = nft_offload_netdev_event,
};
int nft_offload_init(void)
{
- int err;
-
- err = register_netdevice_notifier(&nft_offload_netdev_notifier);
- if (err < 0)
- return err;
-
- flow_indr_add_block_cb(&block_ing_entry);
-
- return 0;
+ return register_netdevice_notifier(&nft_offload_netdev_notifier);
}
void nft_offload_exit(void)
{
- flow_indr_del_block_cb(&block_ing_entry);
unregister_netdevice_notifier(&nft_offload_netdev_notifier);
}
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index 760e51d852f5..a00a203b2ef5 100644
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -621,78 +621,6 @@ static void tcf_chain_flush(struct tcf_chain *chain, bool rtnl_held)
static int tcf_block_setup(struct tcf_block *block,
struct flow_block_offload *bo);
-static void tc_indr_block_cmd(struct net_device *dev, struct tcf_block *block,
- flow_indr_block_bind_cb_t *cb, void *cb_priv,
- enum flow_block_command command, bool ingress)
-{
- struct flow_block_offload bo = {
- .command = command,
- .binder_type = ingress ?
- FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS :
- FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS,
- .net = dev_net(dev),
- .block_shared = tcf_block_non_null_shared(block),
- };
- INIT_LIST_HEAD(&bo.cb_list);
-
- if (!block)
- return;
-
- bo.block = &block->flow_block;
-
- down_write(&block->cb_lock);
- cb(dev, cb_priv, TC_SETUP_BLOCK, &bo);
-
- tcf_block_setup(block, &bo);
- up_write(&block->cb_lock);
-}
-
-static struct tcf_block *tc_dev_block(struct net_device *dev, bool ingress)
-{
- const struct Qdisc_class_ops *cops;
- const struct Qdisc_ops *ops;
- struct Qdisc *qdisc;
-
- if (!dev_ingress_queue(dev))
- return NULL;
-
- qdisc = dev_ingress_queue(dev)->qdisc_sleeping;
- if (!qdisc)
- return NULL;
-
- ops = qdisc->ops;
- if (!ops)
- return NULL;
-
- if (!ingress && !strcmp("ingress", ops->id))
- return NULL;
-
- cops = ops->cl_ops;
- if (!cops)
- return NULL;
-
- if (!cops->tcf_block)
- return NULL;
-
- return cops->tcf_block(qdisc,
- ingress ? TC_H_MIN_INGRESS : TC_H_MIN_EGRESS,
- NULL);
-}
-
-static void tc_indr_block_get_and_cmd(struct net_device *dev,
- flow_indr_block_bind_cb_t *cb,
- void *cb_priv,
- enum flow_block_command command)
-{
- struct tcf_block *block;
-
- block = tc_dev_block(dev, true);
- tc_indr_block_cmd(dev, block, cb, cb_priv, command, true);
-
- block = tc_dev_block(dev, false);
- tc_indr_block_cmd(dev, block, cb, cb_priv, command, false);
-}
-
static void tcf_block_offload_init(struct flow_block_offload *bo,
struct net_device *dev,
enum flow_block_command command,
@@ -3836,11 +3764,6 @@ static struct pernet_operations tcf_net_ops = {
.size = sizeof(struct tcf_net),
};
-static struct flow_indr_block_entry block_entry = {
- .cb = tc_indr_block_get_and_cmd,
- .list = LIST_HEAD_INIT(block_entry.list),
-};
-
static int __init tc_filter_init(void)
{
int err;
@@ -3853,8 +3776,6 @@ static int __init tc_filter_init(void)
if (err)
goto err_register_pernet_subsys;
- flow_indr_add_block_cb(&block_entry);
-
rtnl_register(PF_UNSPEC, RTM_NEWTFILTER, tc_new_tfilter, NULL,
RTNL_FLAG_DOIT_UNLOCKED);
rtnl_register(PF_UNSPEC, RTM_DELTFILTER, tc_del_tfilter, NULL,
--
2.20.1
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