From 12db03b65c2b90752e4c37666977fd4a1b5f5824 Mon Sep 17 00:00:00 2001 From: Vlad Buslov Date: Mon, 11 Feb 2019 10:55:45 +0200 Subject: net: sched: extend proto ops to support unlocked classifiers Add 'rtnl_held' flag to tcf proto change, delete, destroy, dump, walk functions to track rtnl lock status. Extend users of these function in cls API to propagate rtnl lock status to them. This allows classifiers to obtain rtnl lock when necessary and to pass rtnl lock status to extensions and driver offload callbacks. Add flags field to tcf proto ops. Add flag value to indicate that classifier doesn't require rtnl lock. Signed-off-by: Vlad Buslov Acked-by: Jiri Pirko Signed-off-by: David S. Miller --- net/sched/cls_fw.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) (limited to 'net/sched/cls_fw.c') diff --git a/net/sched/cls_fw.c b/net/sched/cls_fw.c index c8173ebb69f2..317151bae73b 100644 --- a/net/sched/cls_fw.c +++ b/net/sched/cls_fw.c @@ -139,7 +139,8 @@ static void fw_delete_filter_work(struct work_struct *work) rtnl_unlock(); } -static void fw_destroy(struct tcf_proto *tp, struct netlink_ext_ack *extack) +static void fw_destroy(struct tcf_proto *tp, bool rtnl_held, + struct netlink_ext_ack *extack) { struct fw_head *head = rtnl_dereference(tp->root); struct fw_filter *f; @@ -163,7 +164,7 @@ static void fw_destroy(struct tcf_proto *tp, struct netlink_ext_ack *extack) } static int fw_delete(struct tcf_proto *tp, void *arg, bool *last, - struct netlink_ext_ack *extack) + bool rtnl_held, struct netlink_ext_ack *extack) { struct fw_head *head = rtnl_dereference(tp->root); struct fw_filter *f = arg; @@ -250,7 +251,8 @@ static int fw_set_parms(struct net *net, struct tcf_proto *tp, static int fw_change(struct net *net, struct sk_buff *in_skb, struct tcf_proto *tp, unsigned long base, u32 handle, struct nlattr **tca, void **arg, - bool ovr, struct netlink_ext_ack *extack) + bool ovr, bool rtnl_held, + struct netlink_ext_ack *extack) { struct fw_head *head = rtnl_dereference(tp->root); struct fw_filter *f = *arg; @@ -354,7 +356,8 @@ errout: return err; } -static void fw_walk(struct tcf_proto *tp, struct tcf_walker *arg) +static void fw_walk(struct tcf_proto *tp, struct tcf_walker *arg, + bool rtnl_held) { struct fw_head *head = rtnl_dereference(tp->root); int h; @@ -384,7 +387,7 @@ static void fw_walk(struct tcf_proto *tp, struct tcf_walker *arg) } static int fw_dump(struct net *net, struct tcf_proto *tp, void *fh, - struct sk_buff *skb, struct tcmsg *t) + struct sk_buff *skb, struct tcmsg *t, bool rtnl_held) { struct fw_head *head = rtnl_dereference(tp->root); struct fw_filter *f = fh; -- cgit v1.2.3-59-g8ed1b