1 files changed, 127 insertions, 0 deletions
diff --git a/share/examples/lkm/vfs/module/kernfsmod.c b/share/examples/lkm/vfs/module/kernfsmod.c
new file mode 100644
index 0000000..2a083f6
--- /dev/null
+++ b/share/examples/lkm/vfs/module/kernfsmod.c
@@ -0,0 +1,127 @@
+/* 05 Jun 93*/
+/*
+ * kernfsmod.c
+ *
+ * 05 Jun 93	Terry Lambert		Original
+ *
+ * Copyright (c) 1993 Terrence R. Lambert.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by Terrence R. Lambert.
+ * 4. The name Terrence R. Lambert may not be used to endorse or promote
+ *    products derived from this software without specific prior written
+ *    permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY TERRENCE R. LAMBERT ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE TERRENCE R. LAMBERT BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+#define printf I_HATE_ANSI
+#include <stdio.h>
+#undef printf
+#include <stdlib.h>
+#include <sys/param.h>
+#include <sys/ioctl.h>
+#include <sys/systm.h>
+#include <sys/conf.h>
+#include <sys/mount.h>
+#include <sys/exec.h>
+#include <sys/lkm.h>
+#include <a.out.h>
+#include <sys/file.h>
+#include <sys/errno.h>
+
+/*
+ * This is the vfsops table from /sys/miscfs/kernfs/kernfs_vfsops.c
+ */
+extern struct vfsops kernfs_vfsops;
+
+/*
+ * Currently, the mount system call is broken in the way it operates
+ * and the vfssw[] table does not have a character string identifier
+ * for the file system type; therefore, to remount a file system after
+ * it has been mounted in the first place, the offset into the table
+ * must be the same; this will be corrected in future patches, but
+ * not right now.  At the same time the fstab format will need to
+ * change to allow definition without mount of file systems.
+ *
+ * The flags field is a parameter to the init; this could be used to
+ * change the file system operation: for instance, in ISOFS, this
+ * could be used to enable/disable Rockridge extensions.
+ */
+MOD_VFS("kernfs",MOUNT_KERNFS,0,&kernfs_vfsops)
+
+/*
+ * This function is called each time the module is loaded.   Technically,
+ * we could have made this "nosys" in the "DISPATCH" in "kernfsmod()",
+ * but it's a convenient place to kick a copyright out to the console.
+ */
+static int
+kernfsmod_load( lkmtp, cmd)
+struct lkm_table	*lkmtp;
+int			cmd;
+{
+	if( cmd == LKM_E_LOAD) {	/* print copyright on console*/
+		printf( "\nSample Loaded file system\n");
+		printf( "Copyright (c) 1990, 1992 Jan-Simon Pendry\n");
+		printf( "All rights reserved.\n");
+		printf( "\nLoader stub and module loader is\n");
+		printf( "Copyright (c) 1993\n");
+		printf( "Terrence R. Lambert\n");
+		printf( "All rights reserved\n");
+	}
+
+	return( 0);
+}
+
+
+/*
+ * External entry point; should generally match name of .o file.  The
+ * arguments are always the same for all loaded modules.  The "load",
+ * "unload", and "stat" functions in "DISPATCH" will be called under
+ * their respective circumstances unless their value is "nosys".  If
+ * called, they are called with the same arguments (cmd is included to
+ * allow the use of a single function, ver is included for version
+ * matching between modules and the kernel loader for the modules).
+ *
+ * Since we expect to link in the kernel and add external symbols to
+ * the kernel symbol name space in a future version, generally all
+ * functions used in the implementation of a particular module should
+ * be static unless they are expected to be seen in other modules or
+ * to resolve unresolved symbols alread existing in the kernel (the
+ * second case is not likely to ever occur).
+ *
+ * The entry point should return 0 unless it is refusing load (in which
+ * case it should return an errno from errno.h).
+ */
+kernfsmod( lkmtp, cmd, ver)
+struct lkm_table	*lkmtp;	
+int			cmd;
+int			ver;
+{
+	DISPATCH(lkmtp,cmd,ver,kernfsmod_load,nosys,nosys)
+}
+
+
+/*
+ * EOF -- This file has not been truncated.
+ */