The branch stable/13 has been updated by donner: URL: https://cgit.FreeBSD.org/src/commit/?id=88e916bff0357ffd0a4b8844cc03c79fcaa2022c
commit 88e916bff0357ffd0a4b8844cc03c79fcaa2022c Author: Lutz Donnerhacke <[email protected]> AuthorDate: 2021-02-09 11:32:46 +0000 Commit: Lutz Donnerhacke <[email protected]> CommitDate: 2021-02-22 08:21:55 +0000 netgraph/ng_bridge: Document staleness in multithreaded operation In the data path of ng_bridge(4), the only value of the host struct, which needs to be modified, is the staleness, which is reset every time a frame is received. It's save to leave the code as it is. This patch is part of a series to make ng_bridge(4) multithreaded. Reviewed by: kp Differential Revision: https://reviews.freebsd.org/D28546 (cherry picked from commit 011b7317dbb5038a95b9b4fca050325a62f3991e) --- sys/netgraph/ng_bridge.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/sys/netgraph/ng_bridge.c b/sys/netgraph/ng_bridge.c index 316f9d4fab8c..b6f763dcb631 100644 --- a/sys/netgraph/ng_bridge.c +++ b/sys/netgraph/ng_bridge.c @@ -808,7 +808,10 @@ ng_bridge_rcvdata(hook_p hook, item_p item) /* Look up packet's source Ethernet address in hashtable */ if ((host = ng_bridge_get(priv, eh->ether_shost)) != NULL) { - /* Update time since last heard from this host */ + /* Update time since last heard from this host. + * This is safe without locking, because it's + * the only operation during shared access. + */ host->staleness = 0; /* Did host jump to a different link? */ _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/dev-commits-src-all To unsubscribe, send any mail to "[email protected]"
