[PATCH] putting old-style lock handling back into 2.2.10

david parsons (o.r.c@p.e.l.l.p.o.r.t.l.a.n.d.o.r.u.s)
4 Jul 1999 16:08:59 -0700

I noticed (when it made one of my test machines blow up and die) that
2.2 doesn't support the old-style F_EXLCK locking anymore. This little
patch (against 2.2.10) puts that locking back, so that people using a.out
gdbm programs won't have them blow up on them.

____
david parsons \bi/ Backwards compatability is good.
\/

--- linux-2.2.10-orig/fs/locks.c Tue May 11 08:52:14 1999
+++ linux-2.2.10/fs/locks.c Sun Jul 4 15:48:15 1999
@@ -441,10 +441,10 @@
current->pid, current->comm);
}
}
+#endif
if (!(filp->f_mode & 3))
goto out_putf;
break;
-#endif
default:
error = -EINVAL;
goto out_putf;
@@ -648,11 +648,22 @@

fl->fl_flags = FL_POSIX;

+ /*
+ * remap old-style locks into the locking method de jour
+ */
switch (l->l_type) {
case F_RDLCK:
case F_WRLCK:
case F_UNLCK:
fl->fl_type = l->l_type;
+ break;
+ case F_SHLCK :
+ fl->fl_type = F_RDLCK;
+ /*fl->fl_flags |= F_BROKEN;*/
+ break;
+ case F_EXLCK :
+ fl->fl_type = F_WRLCK;
+ /*fl->fl_flags |= F_BROKEN;*/
break;
default:
return (0);

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/