[GFS2] add plock owner

We need to use fl_owner instead of fl_pid to track the owner of a posix
lock.  Pass the owner value out to user space where cluster plocks are
managed.
Signed-off-by: NDavid Teigland <teigland@redhat.com>
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>

fs/gfs2/locking/dlm/plock.c

@@ -77,6 +77,7 @@ int gdlm_plock(lm_lockspace_t *lockspace, struct lm_lockname *name,
 	op->info.number		= name->ln_number;
 	op->info.start		= fl->fl_start;
 	op->info.end		= fl->fl_end;
+	op->info.owner		= (__u64)(long) fl->fl_owner;
 
 	send_op(op);
 	wait_event(recv_wq, (op->done != 0));
@@ -122,6 +123,7 @@ int gdlm_punlock(lm_lockspace_t *lockspace, struct lm_lockname *name,
 	op->info.number		= name->ln_number;
 	op->info.start		= fl->fl_start;
 	op->info.end		= fl->fl_end;
+	op->info.owner		= (__u64)(long) fl->fl_owner;
 
 	send_op(op);
 	wait_event(recv_wq, (op->done != 0));

include/linux/lock_dlm_plock.h

@@ -12,7 +12,7 @@
 #define GDLM_PLOCK_MISC_NAME		"lock_dlm_plock"
 
 #define GDLM_PLOCK_VERSION_MAJOR	1
-#define GDLM_PLOCK_VERSION_MINOR	0
+#define GDLM_PLOCK_VERSION_MINOR	1
 #define GDLM_PLOCK_VERSION_PATCH	0
 
 enum {
@@ -34,6 +34,7 @@ struct gdlm_plock_info {
 	__u64 number;
 	__u64 start;
 	__u64 end;
+	__u64 owner;
 };
 
 #endif