def read(self, path):
transaction = lib.xs_transaction_start(self.xsh)
contents = ffi.cast('char *',
lib.xs_read(self.xsh, transaction, path, ffi.NULL))
lib.xs_transaction_end(self.xsh, transaction, False)
if contents == ffi.NULL:
raise XenException('failed to read file', path, errno=True)
return ffi.string(contents)
def domain_setdebugging(self, domid, enable):
err = lib.xc_domain_setdebugging(self.xch, domid, enable)
if err != 0:
raise XenException('Failed to set debugging to',
enable,
'for domid',
domid,
errno=True)
def cleanup():
err = lib.xenforeignmemory_unmap(self.fmem, mem_page_base,
num_pages)
if err:
raise XenException('failed to unmap xen foreign memory',
mem_page_base,
'with err',
err,
errno=True)
def domain_get_guest_width(self, domid):
word_size = ffi.new('unsigned int *')
err = lib.xc_domain_get_guest_width(self.xch, domid, word_size)
if err != 0:
raise XenException('Failed to get word size for domain',
self.domid,
'with err =',
err,
errno=True)
return word_size[0]
def domctl(self, domid, cmd, before, after):
buf = lib.xencall_alloc_buffer(self.xcall, ffi.sizeof('xen_domctl_t'))
domctl = ffi.cast('xen_domctl_t *', buf)
domctl.interface_version = lib.XEN_DOMCTL_INTERFACE_VERSION
domctl.domain = domid
domctl.cmd = cmd
before(domctl.u)
err = lib.xencall1(self.xcall, lib.FOO__HYPERVISOR_domctl,
ffi.cast('uint64_t', buf))
try:
if err != 0:
raise XenException('Hypercall failed with', -err)
else:
return after(domctl.u)
finally:
lib.xencall_free_buffer(self.xcall, buf)
def map_by_mfn(self, domid, base_mfn, offset, size, prot):
num_pages = (size + lib.XC_PAGE_SIZE - 1) >> lib.XC_PAGE_SHIFT
pages = ffi.new('xen_pfn_t[]',
[base_mfn + i for i in range(num_pages)])
mem_page_base = lib.xenforeignmemory_map(self.fmem, domid, prot,
num_pages, pages, ffi.NULL)
if mem_page_base == ffi.NULL:
raise XenException('failed to map xen foreign memory', errno=True)
def cleanup():
err = lib.xenforeignmemory_unmap(self.fmem, mem_page_base,
num_pages)
if err:
raise XenException('failed to unmap xen foreign memory',
mem_page_base,
'with err',
err,
errno=True)
return mem_page_base + offset, cleanup
def close(self):
err = lib.xencall_close(self.xcall)
if err != 0:
raise XenException('Failed to close xencall handle', errno=True)
def __init__(self):
self.xch = lib.xc_interface_open(ffi.NULL, ffi.NULL, 0)
if self.xch == ffi.NULL:
raise XenException('Failed to open xenctrl handle', errno=True)
def vcpu_getcontext(self, domid, vcpu):
ctxt = ffi.new('vcpu_guest_context_any_t *')
err = lib.xc_vcpu_getcontext(self.xch, domid, vcpu, ctxt)
if err != 0:
raise XenException('Failed to get vcpu context', errno=True)
return ctxt
def vcpu_setcontext(self, domid, vcpu, ctxt):
err = lib.xc_vcpu_setcontext(self.xch, domid, vcpu, ctxt)
if err != 0:
raise XenException('Failed to set vcpu context', errno=True)
def translate_foreign_address(self, domid, vcpu, virt):
mfn = lib.xc_translate_foreign_address(self.xch, domid, vcpu, virt)
if mfn == 0:
raise XenException('Failed to translate foreign address',
errno=True)
return mfn
def domain_getinfo(self, domid):
dominfo = ffi.new('xc_dominfo_t *')
n = lib.xc_domain_getinfo(self.xch, domid, 1, dominfo)
if n != 1:
raise XenException('Failed to get domain info', errno=True)
return dominfo
def close(self):
err = lib.xc_interface_close(self.xch)
if err != 0:
raise XenException('Failed to close xenctrl handle', errno=True)
def __init__(self):
self.fmem = lib.xenforeignmemory_open(ffi.NULL, 0)
if self.fmem == ffi.NULL:
raise XenException('failed to open xen foreign memory handle',
errno=True)
def close(self):
err = lib.xenforeignmemory_close(self.fmem)
if err:
raise XenException('failed to close xen foreign memory handle:',
err,
errno=True)
def __init__(self):
self.xsh = lib.xs_open(0)
if self.xsh == ffi.NULL:
raise XenException('failed to open xen store handle', errno=True)
def __init__(self):
self.xcall = lib.xencall_open(ffi.NULL, 0)
if self.xcall == ffi.NULL:
raise XenException('Failed to open xencall handle', errno=True)
def directory(self, path):
num_entries = ffi.new('unsigned int *')
entries = lib.xs_directory(self.xsh, lib.XBT_NULL, path, num_entries)
if entries == ffi.NULL:
raise XenException('failed to read directory', path, errno=True)
return [ffi.string(entries[i]) for i in range(num_entries[0])]