Module Name: src
Committed By: knakahara
Date: Mon Nov 27 05:03:11 UTC 2017
Modified Files:
src/sys/net: if_gif.h
Log Message:
update gif(4) locking notes.
To generate a diff of this commit:
cvs rdiff -u -r1.28 -r1.29 src/sys/net/if_gif.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/net/if_gif.h
diff -u src/sys/net/if_gif.h:1.28 src/sys/net/if_gif.h:1.29
--- src/sys/net/if_gif.h:1.28 Mon Nov 27 05:02:22 2017
+++ src/sys/net/if_gif.h Mon Nov 27 05:03:11 2017
@@ -1,4 +1,4 @@
-/* $NetBSD: if_gif.h,v 1.28 2017/11/27 05:02:22 knakahara Exp $ */
+/* $NetBSD: if_gif.h,v 1.29 2017/11/27 05:03:11 knakahara Exp $ */
/* $KAME: if_gif.h,v 1.23 2001/07/27 09:21:42 itojun Exp $ */
/*
@@ -140,14 +140,15 @@ int gif_encapcheck(struct mbuf *, int, i
* + gif_softc_list is protected by gif_softcs.lock (an adaptive mutex)
* gif_softc_list is list of all gif_softcs. It is used by ioctl
* context only.
- * + Members of struct gif_softc except for gif_ro_percpu are protected by
- * - encap_lock for writer
- * - stopping processing when writer begin to run
- * for reader(Tx and Rx processing)
+ * + gif_softc->gif_var is protected by
+ * - gif_softc->gif_lock (an adaptive mutex) for writer
+ * - gif_var->gv_psref for reader
+ * gif_softc->gif_var is used for variant values while the gif tunnel
+ * exists.
* + Each CPU's gif_ro.gr_ro of gif_ro_percpu are protected by
* percpu'ed gif_ro.gr_lock.
*
* Locking order:
- * - encap_lock => gif_softcs.lock
+ * - encap_lock => gif_softc->gif_lock => gif_softcs.lock
*/
#endif /* !_NET_IF_GIF_H_ */
