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authorVlad Buslov <vladbu@mellanox.com>2019-08-26 16:45:06 +0300
committerDavid S. Miller <davem@davemloft.net>2019-08-27 00:17:43 +0300
commit918190f50eb630032ca0fb21f14f2e9c5c325626 (patch)
tree02e87d067c9703d774ff0fc9139b24c02ac24a89 /net/sched/cls_flower.c
parent1444c175a37443d3f6d3db825df050741452c3c3 (diff)
downloadlinux-918190f50eb630032ca0fb21f14f2e9c5c325626.tar.xz
net: sched: flower: don't take rtnl lock for cls hw offloads API
Don't manually take rtnl lock in flower classifier before calling cls hardware offloads API. Instead, pass rtnl lock status via 'rtnl_held' parameter. 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_flower.c')
-rw-r--r--net/sched/cls_flower.c53
1 files changed, 16 insertions, 37 deletions
diff --git a/net/sched/cls_flower.c b/net/sched/cls_flower.c
index 2852fe6f50d2..74221e3351c3 100644
--- a/net/sched/cls_flower.c
+++ b/net/sched/cls_flower.c
@@ -412,18 +412,13 @@ static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f,
struct tcf_block *block = tp->chain->block;
struct flow_cls_offload cls_flower = {};
- if (!rtnl_held)
- rtnl_lock();
-
tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack);
cls_flower.command = FLOW_CLS_DESTROY;
cls_flower.cookie = (unsigned long) f;
tc_setup_cb_destroy(block, tp, TC_SETUP_CLSFLOWER, &cls_flower, false,
- &f->flags, &f->in_hw_count, true);
+ &f->flags, &f->in_hw_count, rtnl_held);
- if (!rtnl_held)
- rtnl_unlock();
}
static int fl_hw_replace_filter(struct tcf_proto *tp,
@@ -435,14 +430,9 @@ static int fl_hw_replace_filter(struct tcf_proto *tp,
bool skip_sw = tc_skip_sw(f->flags);
int err = 0;
- if (!rtnl_held)
- rtnl_lock();
-
cls_flower.rule = flow_rule_alloc(tcf_exts_num_actions(&f->exts));
- if (!cls_flower.rule) {
- err = -ENOMEM;
- goto errout;
- }
+ if (!cls_flower.rule)
+ return -ENOMEM;
tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack);
cls_flower.command = FLOW_CLS_REPLACE;
@@ -453,36 +443,30 @@ static int fl_hw_replace_filter(struct tcf_proto *tp,
cls_flower.classid = f->res.classid;
err = tc_setup_flow_action(&cls_flower.rule->action, &f->exts,
- true);
+ rtnl_held);
if (err) {
kfree(cls_flower.rule);
- if (skip_sw)
+ if (skip_sw) {
NL_SET_ERR_MSG_MOD(extack, "Failed to setup flow action");
- else
- err = 0;
- goto errout;
+ return err;
+ }
+ return 0;
}
err = tc_setup_cb_add(block, tp, TC_SETUP_CLSFLOWER, &cls_flower,
- skip_sw, &f->flags, &f->in_hw_count, true);
+ skip_sw, &f->flags, &f->in_hw_count, rtnl_held);
tc_cleanup_flow_action(&cls_flower.rule->action);
kfree(cls_flower.rule);
if (err) {
- fl_hw_destroy_filter(tp, f, true, NULL);
- goto errout;
- }
-
- if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW)) {
- err = -EINVAL;
- goto errout;
+ fl_hw_destroy_filter(tp, f, rtnl_held, NULL);
+ return err;
}
-errout:
- if (!rtnl_held)
- rtnl_unlock();
+ if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW))
+ return -EINVAL;
- return err;
+ return 0;
}
static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f,
@@ -491,22 +475,17 @@ static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f,
struct tcf_block *block = tp->chain->block;
struct flow_cls_offload cls_flower = {};
- if (!rtnl_held)
- rtnl_lock();
-
tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, NULL);
cls_flower.command = FLOW_CLS_STATS;
cls_flower.cookie = (unsigned long) f;
cls_flower.classid = f->res.classid;
- tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true);
+ tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false,
+ rtnl_held);
tcf_exts_stats_update(&f->exts, cls_flower.stats.bytes,
cls_flower.stats.pkts,
cls_flower.stats.lastused);
-
- if (!rtnl_held)
- rtnl_unlock();
}
static void __fl_put(struct cls_fl_filter *f)