diff options
| author | Oz Shlomo <ozsh@nvidia.com> | 2021-03-03 14:59:53 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2021-03-18 00:31:19 +0100 |
| commit | 2ed37183abb70233146dc82f19cb1cbceed2b505 (patch) | |
| tree | ed5e843a81048ab43e01d773a3b91601a0ece760 /net/netfilter | |
| parent | ebfbc46b35cb70b9fbd88f376d7a33b79f60adff (diff) | |
netfilter: flowtable: separate replace, destroy and stats to different workqueues
Currently the flow table offload replace, destroy and stats work items are
executed on a single workqueue. As such, DESTROY and STATS commands may
be backloged after a burst of REPLACE work items. This scenario can bloat
up memory and may cause active connections to age.
Instatiate add, del and stats workqueues to avoid backlogs of non-dependent
actions. Provide sysfs control over the workqueue attributes, allowing
userspace applications to control the workqueue cpumask.
Signed-off-by: Oz Shlomo <ozsh@nvidia.com>
Reviewed-by: Paul Blakey <paulb@nvidia.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/netfilter')
| -rw-r--r-- | net/netfilter/nf_flow_table_offload.c | 44 |
1 files changed, 36 insertions, 8 deletions
diff --git a/net/netfilter/nf_flow_table_offload.c b/net/netfilter/nf_flow_table_offload.c index 2a6993fa40d7..1b979c8b3ba0 100644 --- a/net/netfilter/nf_flow_table_offload.c +++ b/net/netfilter/nf_flow_table_offload.c @@ -13,7 +13,9 @@ #include <net/netfilter/nf_conntrack_core.h> #include <net/netfilter/nf_conntrack_tuple.h> -static struct workqueue_struct *nf_flow_offload_wq; +static struct workqueue_struct *nf_flow_offload_add_wq; +static struct workqueue_struct *nf_flow_offload_del_wq; +static struct workqueue_struct *nf_flow_offload_stats_wq; struct flow_offload_work { struct list_head list; @@ -826,7 +828,12 @@ static void flow_offload_work_handler(struct work_struct *work) static void flow_offload_queue_work(struct flow_offload_work *offload) { - queue_work(nf_flow_offload_wq, &offload->work); + if (offload->cmd == FLOW_CLS_REPLACE) + queue_work(nf_flow_offload_add_wq, &offload->work); + else if (offload->cmd == FLOW_CLS_DESTROY) + queue_work(nf_flow_offload_del_wq, &offload->work); + else + queue_work(nf_flow_offload_stats_wq, &offload->work); } static struct flow_offload_work * @@ -898,8 +905,11 @@ 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_workqueue(nf_flow_offload_wq); + if (nf_flowtable_hw_offload(flowtable)) { + flush_workqueue(nf_flow_offload_add_wq); + flush_workqueue(nf_flow_offload_del_wq); + flush_workqueue(nf_flow_offload_stats_wq); + } } static int nf_flow_table_block_setup(struct nf_flowtable *flowtable, @@ -1011,15 +1021,33 @@ EXPORT_SYMBOL_GPL(nf_flow_table_offload_setup); int nf_flow_table_offload_init(void) { - nf_flow_offload_wq = alloc_workqueue("nf_flow_table_offload", - WQ_UNBOUND, 0); - if (!nf_flow_offload_wq) + nf_flow_offload_add_wq = alloc_workqueue("nf_ft_offload_add", + WQ_UNBOUND | WQ_SYSFS, 0); + if (!nf_flow_offload_add_wq) return -ENOMEM; + nf_flow_offload_del_wq = alloc_workqueue("nf_ft_offload_del", + WQ_UNBOUND | WQ_SYSFS, 0); + if (!nf_flow_offload_del_wq) + goto err_del_wq; + + nf_flow_offload_stats_wq = alloc_workqueue("nf_ft_offload_stats", + WQ_UNBOUND | WQ_SYSFS, 0); + if (!nf_flow_offload_stats_wq) + goto err_stats_wq; + return 0; + +err_stats_wq: + destroy_workqueue(nf_flow_offload_del_wq); +err_del_wq: + destroy_workqueue(nf_flow_offload_add_wq); + return -ENOMEM; } void nf_flow_table_offload_exit(void) { - destroy_workqueue(nf_flow_offload_wq); + destroy_workqueue(nf_flow_offload_add_wq); + destroy_workqueue(nf_flow_offload_del_wq); + destroy_workqueue(nf_flow_offload_stats_wq); } |