#!/usr/sbin/dtrace -s

/* #pragma D option flowindent */

syscall::open:entry,
syscall::open64:entry
{
	self->flag = 1;
	printf( "open %s", copyinstr(arg0) );
}

/* Limit tracing only to the vnode_t KMEM cache */

fbt:genunix:kmem_cache_*:entry,
fbt:genunix:kmem_depot_*:entry,
fbt:genunix:kmem_slab_*:entry
/self->flag && ((kmem_cache_t*)arg0)->cache_name == "vn_cache" /
{
	printf("kmem %s", ((kmem_cache_t *)arg0)->cache_name);  
	self->in_traced_call = 1
}

/* To keep the indentation aligned ---but still didn't fully work */

fbt:genunix:kmem_cache_*:return,
fbt:genunix:kmem_depot_*:return,
fbt:genunix:kmem_slab_*:return
/self->flag && self->in_traced_call/ 
{
	self->in_traced_call = 0;
}

syscall::open:return,
syscall::open64:return
{
	self->flag = 0;
}