void
disk_buf_free (struct buf *bp)
{
u_int datalen;
u_int data, next;
/* unpin pages */
if (bp->b_flags & B_SCSICMD) {
struct scsicmd *scsicmd = (struct scsicmd *) bp->b_memaddr;
data = (u_int) scsicmd->data_addr;
datalen = scsicmd->datalen;
free (scsicmd->scsi_cmd);
free (scsicmd);
} else {
data = (u_int)bp->b_memaddr;
datalen = bp->b_bcount;
}
while (datalen > 0) {
if (bp->b_flags & B_BC_REQ) {
ppage_unpin (kva2pp (data));
} else {
struct Env *e;
int r;
e = env_id2env (bp->b_envid, &r);
assert (e); /* XXX - what if an env with an outstanding request dies? */
ppage_unpin (&ppages[PGNO (*env_va2ptep (e, data))]);
}
/* go to start of next page of data */
next = (data & ~PGMASK) + NBPG;
if (next - data >= datalen) break;
assert (next > data);
datalen -= next - data;
data = next;
}
if (bp->b_resptr) {
ppage_unpin (kva2pp ((u_int) bp->b_resptr));
}
free (bp);
}
static void *translate_address (uint uva, int align)
{
Pte *ptep;
void *ptr = NULL;
ptep = env_va2ptep (curenv, uva);
if (ptep) {
/*
&& (*ptep & bits) == bits) {
*/
ptr = (struct dinode *) (ptov (*ptep & ~PGMASK) + (uva % NBPG));
if ((align) && ((uint)ptr % align)) {
ptr = NULL;
}
}
if ((ptr == NULL) && (uva != 0)) {
printf ("fsprot: translate_address: bad address supplied (%x, align %d)\n", uva, align);
}
return (ptr);
}
