int get_footer(server *srv, chunkqueue *cq, vhd_state_t *state, off_t *curr_off)
{
int err;
vhd_context_t *vhd = &state->vhd;
err = fill(srv, cq, &vhd->footer, sizeof(vhd_footer_t), 0, curr_off);
if (err)
return err;
if (*curr_off < 0 + sizeof(vhd_footer_t))
return 0;
DEBUGLOG("s", "Footer all in");
vhd_footer_in(&vhd->footer);
err = vhd_validate_footer(&vhd->footer);
if (err)
LOG("sd", "ERROR: VHD footer invalid:", err);
if (!vhd_type_dynamic(vhd)) {
LOG("s", "ERROR: static VHDs are not supported");
err = -EINVAL;
}
return err;
}
static int
__vhd_journal_read_footer(vhd_journal_t *j,
vhd_footer_t *footer, uint32_t type)
{
int err;
vhd_journal_entry_t entry;
err = vhd_journal_read_entry(j, &entry);
if (err)
return err;
if (entry.type != type)
return -EINVAL;
if (entry.size != sizeof(vhd_footer_t))
return -EINVAL;
err = vhd_journal_read(j, footer, entry.size);
if (err)
return err;
vhd_footer_in(footer);
return vhd_validate_footer(footer);
}
