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netfilter: flowtable: Use work entry per offload command 

To allow offload commands to execute in parallel, create workqueue
for flow table offload, and use a work entry per offload command.

Signed-off-by: Paul Blakey <paulb@mellanox.com>
Reviewed-by: Oz Shlomo <ozsh@mellanox.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Paul Blakey 2020-03-27 12:12:30 +03:00 committed by Pablo Neira Ayuso
parent 422c032afc
commit 7da182a998
1 changed files with 15 additions and 31 deletions
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46
net/netfilter/nf_flow_table_offload.c
View File

@ -12,9 +12,7 @@
#include <net/netfilter/nf_conntrack_core.h>
#include <net/netfilter/nf_conntrack_tuple.h>
static struct work_struct nf_flow_offload_work;
static DEFINE_SPINLOCK(flow_offload_pending_list_lock);
static LIST_HEAD(flow_offload_pending_list);
static struct workqueue_struct *nf_flow_offload_wq;
struct flow_offload_work {
struct list_head list;
@ -22,6 +20,7 @@ struct flow_offload_work {
int priority;
struct nf_flowtable *flowtable;
struct flow_offload *flow;
struct work_struct work;
};
#define NF_FLOW_DISSECTOR(__match, __type, __field) \
@ -788,15 +787,10 @@ static void flow_offload_work_stats(struct flow_offload_work *offload)
static void flow_offload_work_handler(struct work_struct *work)
{
struct flow_offload_work *offload, *next;
LIST_HEAD(offload_pending_list);
struct flow_offload_work *offload;
spin_lock_bh(&flow_offload_pending_list_lock);
list_replace_init(&flow_offload_pending_list, &offload_pending_list);
spin_unlock_bh(&flow_offload_pending_list_lock);
list_for_each_entry_safe(offload, next, &offload_pending_list, list) {
switch (offload->cmd) {
offload = container_of(work, struct flow_offload_work, work);
switch (offload->cmd) {
case FLOW_CLS_REPLACE:
flow_offload_work_add(offload);
break;
@ -808,19 +802,14 @@ static void flow_offload_work_handler(struct work_struct *work)
break;
default:
WARN_ON_ONCE(1);
}
list_del(&offload->list);
kfree(offload);
}
kfree(offload);
}
static void flow_offload_queue_work(struct flow_offload_work *offload)
{
spin_lock_bh(&flow_offload_pending_list_lock);
list_add_tail(&offload->list, &flow_offload_pending_list);
spin_unlock_bh(&flow_offload_pending_list_lock);
schedule_work(&nf_flow_offload_work);
queue_work(nf_flow_offload_wq, &offload->work);
}
static struct flow_offload_work *
@ -837,6 +826,7 @@ nf_flow_offload_work_alloc(struct nf_flowtable *flowtable,
offload->flow = flow;
offload->priority = flowtable->priority;
offload->flowtable = flowtable;
INIT_WORK(&offload->work, flow_offload_work_handler);
return offload;
}
@ -887,7 +877,7 @@ void nf_flow_offload_stats(struct nf_flowtable *flowtable,
void nf_flow_table_offload_flush(struct nf_flowtable *flowtable)
{
if (nf_flowtable_hw_offload(flowtable))
flush_work(&nf_flow_offload_work);
flush_workqueue(nf_flow_offload_wq);
}
static int nf_flow_table_block_setup(struct nf_flowtable *flowtable,
@ -1052,7 +1042,10 @@ static struct flow_indr_block_entry block_ing_entry = {
int nf_flow_table_offload_init(void)
{
INIT_WORK(&nf_flow_offload_work, flow_offload_work_handler);
nf_flow_offload_wq = alloc_workqueue("nf_flow_table_offload",
WQ_UNBOUND | WQ_MEM_RECLAIM, 0);
if (!nf_flow_offload_wq)
return -ENOMEM;
flow_indr_add_block_cb(&block_ing_entry);
@ -1061,15 +1054,6 @@ int nf_flow_table_offload_init(void)
void nf_flow_table_offload_exit(void)
{
struct flow_offload_work *offload, *next;
LIST_HEAD(offload_pending_list);
flow_indr_del_block_cb(&block_ing_entry);
cancel_work_sync(&nf_flow_offload_work);
list_for_each_entry_safe(offload, next, &offload_pending_list, list) {
list_del(&offload->list);
kfree(offload);
}
destroy_workqueue(nf_flow_offload_wq);
}