Author: jhb
Date: Thu Jan 5 18:35:49 2012
New Revision: 229614
URL: http://svn.freebsd.org/changeset/base/229614
Log:
Add new variants of the IF_ADDR_*LOCK*() macros used for protecting
interface address lists that distinguish read locks from write locks.
To preserve the KPI, the previous operations are mapped to the write
lock macros. The lock is still kept as a mutex for now.
Reviewed by: bz
MFC after: 2 weeks
Modified:
head/sys/net/if_var.h
Modified: head/sys/net/if_var.h
==============================================================================
--- head/sys/net/if_var.h Thu Jan 5 18:32:37 2012 (r229613)
+++ head/sys/net/if_var.h Thu Jan 5 18:35:49 2012 (r229614)
@@ -249,9 +249,15 @@ typedef void if_init_f_t(void *);
#define IF_ADDR_LOCK_INIT(if) mtx_init(&(if)->if_addr_mtx,
\
"if_addr_mtx", NULL, MTX_DEF)
#define IF_ADDR_LOCK_DESTROY(if) mtx_destroy(&(if)->if_addr_mtx)
-#define IF_ADDR_LOCK(if) mtx_lock(&(if)->if_addr_mtx)
-#define IF_ADDR_UNLOCK(if) mtx_unlock(&(if)->if_addr_mtx)
+#define IF_ADDR_WLOCK(if) mtx_lock(&(if)->if_addr_mtx)
+#define IF_ADDR_WUNLOCK(if) mtx_unlock(&(if)->if_addr_mtx)
+#define IF_ADDR_RLOCK(if) mtx_lock(&(if)->if_addr_mtx)
+#define IF_ADDR_RUNLOCK(if) mtx_unlock(&(if)->if_addr_mtx)
#define IF_ADDR_LOCK_ASSERT(if) mtx_assert(&(if)->if_addr_mtx, MA_OWNED)
+#define IF_ADDR_WLOCK_ASSERT(if) mtx_assert(&(if)->if_addr_mtx,
MA_OWNED)
+/* XXX: Compat. */
+#define IF_ADDR_LOCK(if) IF_ADDR_WLOCK(if)
+#define IF_ADDR_UNLOCK(if) IF_ADDR_WUNLOCK(if)
/*
* Function variations on locking macros intended to be used by loadable
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