PSARC 2007/632 Caller context flags

6627507 Remove cross calls from v2 and v3 server

1 files changed, 9 insertions, 0 deletions

diff --git a/usr/src/uts/common/sys/vnode.h b/usr/src/uts/common/sys/vnode.h
index 3195fb4ebd..82d267700e 100644
--- a/usr/src/uts/common/sys/vnode.h
+++ b/usr/src/uts/common/sys/vnode.h
@@ -756,9 +756,18 @@ typedef struct caller_context {
 	pid_t		cc_pid;		/* Process ID of the caller */
 	int		cc_sysid;	/* System ID, used for remote calls */
 	u_longlong_t	cc_caller_id;	/* Identifier for (set of) caller(s) */
+	ulong_t		cc_flags;
 } caller_context_t;
 
 /*
+ * Flags for caller context.  The caller sets CC_DONTBLOCK if it does not
+ * want to block inside of a FEM monitor.  The monitor will set CC_WOULDBLOCK
+ * and return EAGAIN if the operation would have blocked.
+ */
+#define	CC_WOULDBLOCK	0x01
+#define	CC_DONTBLOCK	0x02
+
+/*
  * Structure tags for function prototypes, defined elsewhere.
  */
 struct pathname;