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author | 2019-08-26 16:45:06 +0300 | |
---|---|---|
committer | 2019-08-26 14:17:43 -0700 | |
commit | 918190f50eb630032ca0fb21f14f2e9c5c325626 (patch) | |
tree | 02e87d067c9703d774ff0fc9139b24c02ac24a89 /net/sched | |
parent | net: sched: copy tunnel info when setting flow_action entry->tunnel (diff) | |
download | linux-918190f50eb630032ca0fb21f14f2e9c5c325626.tar.gz linux-918190f50eb630032ca0fb21f14f2e9c5c325626.tar.bz2 linux-918190f50eb630032ca0fb21f14f2e9c5c325626.zip |
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')
-rw-r--r-- | net/sched/cls_flower.c | 53 |
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) |