svn commit: r200846 - user/luigi/ipfw3-head/sys/netinet/ipfw

[Luigi Rizzo]

Author: luigi
Date: Tue Dec 22 15:45:38 2009
New Revision: 200846
URL: http://svn.freebsd.org/changeset/base/200846

Log:
  add a comment on locking

Modified:
  user/luigi/ipfw3-head/sys/netinet/ipfw/ip_fw_table.c

Modified: user/luigi/ipfw3-head/sys/netinet/ipfw/ip_fw_table.c
==============================================================================
--- user/luigi/ipfw3-head/sys/netinet/ipfw/ip_fw_table.c	Tue Dec 22 15:41:58 2009	(r200845)
+++ user/luigi/ipfw3-head/sys/netinet/ipfw/ip_fw_table.c	Tue Dec 22 15:45:38 2009	(r200846)
@@ -34,6 +34,9 @@ __FBSDID("$FreeBSD$");
  * keys are network prefixes (addr/masklen), and values are integers.
  * As a degenerate case we can interpret keys as 32-bit integers
  * (with a /32 mask).
+ *
+ * The table is protected by the IPFW lock even for manipulation coming
+ * from userland, because operations are typically fast.
  */
 
 #if !defined(KLD_MODULE)