/*-
 * Test code for vn_fullpath()
 * It does a namei() operation.  It then dumps the whole namei structure
 * After that, it does vn_fullpath() call on the returned vnode.  If it
 * succeeds, it will print the output of vn_fullpath().
 */

#include <sys/types.h>
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/module.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/systm.h>
#include <sys/namei.h>
#include <sys/vnode.h>

/*
 * The function called at load/unload.
 */
static int
load (struct module *module, int cmd, void *arg)
{
	int error;
	char *freepath, *fullpath;
	struct nameidata nd;
	
	switch (cmd) {
	case MOD_LOAD :

		NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "Makefile",
				curproc);
		nd.ni_cnd.cn_flags |= SAVENAME|RDONLY|SAVESTART;
		if (namei(&nd) == -1)
			return error;
		printf("namei() on /sys/dev/fritz/f_http.c (struct dump):\n");
		printf("ni_dirp = %s, ni_startdir/rootdir/topdir = %p/%p/%p, ni_vp = %p, ni_dvp = %p, ni_pathlen = %d, cn_pnbuf = %s cn_nameptr = %s\n",
				nd.ni_dirp, nd.ni_startdir, nd.ni_rootdir, nd.ni_topdir, nd.ni_vp,
				nd.ni_dvp, (int) nd.ni_pathlen, nd.ni_cnd.cn_pnbuf, nd.ni_cnd.cn_nameptr);

		/* now perform vn_fullpath (textvp_fullpath in 4.x) */
		error = textvp_fullpath(curproc, &fullpath, &freepath);
		if (error != 0)
			printf("textvp_fullpath: error = %d\n", error);
		printf("textvp path = %s\n", fullpath);
		free(freepath, M_TEMP);

		NDFREE(&nd, NDF_NO_FREE_PNBUF);
		break;
	case MOD_UNLOAD :
		break;
	default :
		error = EINVAL;
		break;
	}
	return error;
}

static moduledata_t mod_data = {
	"vnblah3",
	load,
	0
};

DECLARE_MODULE(vnblah4, mod_data, SI_SUB_DRIVERS, SI_ORDER_ANY);