Module: Libvirt
- Defined in:
- lib/libvirt.rb,
ext/libvirt/_libvirt.c
Defined Under Namespace
Classes: ConnectionError, DefinitionError, Error, Interface, NWFilter, NoSupportError, NodeDevice, RetrieveError, Version
Constant Summary collapse
- CONNECT_RO =
INT2NUM(VIR_CONNECT_RO)
- CRED_USERNAME =
INT2NUM(VIR_CRED_USERNAME)
- CRED_AUTHNAME =
INT2NUM(VIR_CRED_AUTHNAME)
- CRED_LANGUAGE =
INT2NUM(VIR_CRED_LANGUAGE)
- CRED_CNONCE =
INT2NUM(VIR_CRED_CNONCE)
- CRED_PASSPHRASE =
INT2NUM(VIR_CRED_PASSPHRASE)
- CRED_ECHOPROMPT =
INT2NUM(VIR_CRED_ECHOPROMPT)
- CRED_NOECHOPROMPT =
INT2NUM(VIR_CRED_NOECHOPROMPT)
- CRED_REALM =
INT2NUM(VIR_CRED_REALM)
- CRED_EXTERNAL =
INT2NUM(VIR_CRED_EXTERNAL)
- EVENT_HANDLE_READABLE =
INT2NUM(VIR_EVENT_HANDLE_READABLE)
- EVENT_HANDLE_WRITABLE =
INT2NUM(VIR_EVENT_HANDLE_WRITABLE)
- EVENT_HANDLE_ERROR =
INT2NUM(VIR_EVENT_HANDLE_ERROR)
- EVENT_HANDLE_HANGUP =
INT2NUM(VIR_EVENT_HANDLE_HANGUP)
Class Method Summary collapse
-
.Libvirt::event_invoke_handle_callback(handle, fd, events, opaque) ⇒ Qnil
Unlike most of the other functions in the ruby-libvirt bindings, this one does not directly correspond to a libvirt API function.
-
.Libvirt::event_invoke_timeout_callback(timer, opaque) ⇒ Qnil
Unlike most of the other functions in the ruby-libvirt bindings, this one does not directly correspond to a libvirt API function.
-
.Libvirt::event_register_impl(add_handle = nil, update_handle = nil, remove_handle = nil, add_timeout = nil, update_timeout = nil, remove_timeout = nil) ⇒ Qnil
Call
virEventRegisterImpl
[http://www.libvirt.org/html/libvirt-libvirt.html#virEventRegisterImpl] to register callback handlers for handles and timeouts. -
.Libvirt::open(uri = nil) ⇒ Libvirt::Connect
Call
virConnectOpen
[http://www.libvirt.org/html/libvirt-libvirt.html#virConnectOpen] to open a connection to a URL. -
.Libvirt::open_auth(uri = nil, credlist = nil, userdata = nil, flags = 0) {|...| ... } ⇒ Libvirt::Connect
Call
virConnectOpenAuth
[http://www.libvirt.org/html/libvirt-libvirt.html#virConnectOpenAuth] to open a connection to a libvirt URI, with a possible authentication block. -
.Libvirt::open_read_only(uri = nil) ⇒ Libvirt::Connect
Call
virConnectOpenReadOnly
[http://www.libvirt.org/html/libvirt-libvirt.html#virConnectOpenReadOnly] to open a read-only connection to a URL. -
.Libvirt::version(type = nil) ⇒ Array
Call
virGetVersion
[http://www.libvirt.org/html/libvirt-libvirt.html#virGetVersion] to get the version of libvirt and of the hypervisor TYPE.
Class Method Details
.Libvirt::event_invoke_handle_callback(handle, fd, events, opaque) ⇒ Qnil
Unlike most of the other functions in the ruby-libvirt bindings, this one does not directly correspond to a libvirt API function. Instead, this module method (and event_invoke_timeout_callback) are meant to be called when there is an event of interest to libvirt on one of the file descriptors that libvirt uses. The application is notified of the file descriptors that libvirt uses via the callbacks from Libvirt::event_register_impl. When there is an event of interest, the application must call event_invoke_timeout_callback to ensure proper operation.
Libvirt::event_invoke_handle_callback takes 4 arguments:
handle
an application specific handle ID. This can be any integer, but
must be unique from all other libvirt handles in the application.
fd
the file descriptor of interest. This was given to the application
as a callback to add_handle of Libvirt::event_register_impl
events
the events that have occured on the fd. Note that the events are
libvirt specific, and are some combination of
Libvirt::EVENT_HANDLE_READABLE, Libvirt::EVENT_HANDLE_WRITABLE,
Libvirt::EVENT_HANDLE_ERROR, Libvirt::EVENT_HANDLE_HANGUP. To
notify libvirt of more than one event at a time, these values should
be logically OR'ed together.
opaque
the opaque data passed from libvirt during the
Libvirt::event_register_impl add_handle callback. To ensure proper
operation this data must be passed through to
event_invoke_handle_callback without modification.
359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 |
# File 'ext/libvirt/_libvirt.c', line 359
static VALUE libvirt_event_invoke_handle_callback(VALUE m, VALUE handle,
VALUE fd, VALUE events,
VALUE opaque) {
virEventHandleCallback cb;
void *op;
VALUE libvirt_cb;
VALUE libvirt_opaque;
if (TYPE(opaque) != T_HASH)
rb_raise(rb_eTypeError,
"wrong event callback argument type (expected Hash)");
libvirt_cb = rb_hash_aref(opaque, rb_str_new2("libvirt_cb"));
/* This is equivalent to Data_Get_Struct; I reproduce it here because
* I don't want the additional type-cast that Data_Get_Struct does
*/
Check_Type(libvirt_cb, T_DATA);
cb = DATA_PTR(libvirt_cb);
if (cb) {
libvirt_opaque = rb_hash_aref(opaque, rb_str_new2("opaque"));
Data_Get_Struct(libvirt_opaque, void *, op);
cb(NUM2INT(handle), NUM2INT(fd), NUM2INT(events), op);
}
return Qnil;
}
|
.Libvirt::event_invoke_timeout_callback(timer, opaque) ⇒ Qnil
Unlike most of the other functions in the ruby-libvirt bindings, this one does not directly correspond to a libvirt API function. Instead, this module method (and event_invoke_handle_callback) are meant to be called when there is a timeout of interest to libvirt. The application is notified of the timers that libvirt uses via the callbacks from Libvirt::event_register_impl. When a timeout expires, the application must call event_invoke_timeout_callback to ensure proper operation.
Libvirt::event_invoke_timeout_callback takes 2 arguments:
handle
an application specific timer ID. This can be any integer, but
must be unique from all other libvirt timers in the application.
opaque
the opaque data passed from libvirt during the
Libvirt::event_register_impl add_handle callback. To ensure proper
operation this data must be passed through to
event_invoke_handle_callback without modification.
411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 |
# File 'ext/libvirt/_libvirt.c', line 411
static VALUE libvirt_event_invoke_timeout_callback(VALUE m, VALUE timer,
VALUE opaque) {
virEventTimeoutCallback cb;
void *op;
VALUE libvirt_cb;
VALUE libvirt_opaque;
if (TYPE(opaque) != T_HASH)
rb_raise(rb_eTypeError,
"wrong event callback argument type (expected Hash)");
libvirt_cb = rb_hash_aref(opaque, rb_str_new2("libvirt_cb"));
/* This is equivalent to Data_Get_Struct; I reproduce it here because
* I don't want the additional type-cast that Data_Get_Struct does
*/
Check_Type(libvirt_cb, T_DATA);
cb = DATA_PTR(libvirt_cb);
if (cb) {
libvirt_opaque = rb_hash_aref(opaque, rb_str_new2("opaque"));
Data_Get_Struct(libvirt_opaque, void *, op);
cb(NUM2INT(timer), op);
}
return Qnil;
}
|
.Libvirt::event_register_impl(add_handle = nil, update_handle = nil, remove_handle = nil, add_timeout = nil, update_timeout = nil, remove_timeout = nil) ⇒ Qnil
Call virEventRegisterImpl
[http://www.libvirt.org/html/libvirt-libvirt.html#virEventRegisterImpl] to register callback handlers for handles and timeouts. These handles and timeouts are used as part of the libvirt infrastructure for generating domain events. Each callback must be a Symbol (that is the name of a method to callback), a Proc, or nil (to disable the callback). In the end-user application program, these callbacks are typically used to track the file descriptors or timers that libvirt is interested in (and is intended to be integrated into the “main loop” of a UI program). The individual callbacks will be given a certain number of arguments, and must return certain values. Those arguments and return types are:
add_handle(fd, events, opaque) => Fixnum
update_handle(handleID, event) => nil
remove_handle(handleID) => opaque data from add_handle
add_timeout(interval, opaque) => Fixnum
update_timeout(timerID, timeout) => nil
remove_timeout(timerID) => opaque data from add_timeout
Any arguments marked as “opaque” must be accepted from the library and saved without modification. The values passed to the callbacks are meant to be passed to the event_invoke_handle_callback and event_invoke_timeout_callback module methods; see the documentation for those methods for more details.
655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 |
# File 'ext/libvirt/_libvirt.c', line 655
static VALUE libvirt_conn_event_register_impl(int argc, VALUE *argv, VALUE c) {
virEventAddHandleFunc add_handle_temp;
virEventUpdateHandleFunc update_handle_temp;
virEventRemoveHandleFunc remove_handle_temp;
virEventAddTimeoutFunc add_timeout_temp;
virEventUpdateTimeoutFunc update_timeout_temp;
virEventRemoveTimeoutFunc remove_timeout_temp;
/*
* subtle; we put the arguments (callbacks) directly into the global
* add_handle, update_handle, etc. variables. Then we register the
* internal functions as the callbacks with virEventRegisterImpl
*/
rb_scan_args(argc, argv, "06", &add_handle, &update_handle, &remove_handle,
&add_timeout, &update_timeout, &remove_timeout);
if (!is_symbol_proc_or_nil(add_handle) ||
!is_symbol_proc_or_nil(update_handle) ||
!is_symbol_proc_or_nil(remove_handle) ||
!is_symbol_proc_or_nil(add_timeout) ||
!is_symbol_proc_or_nil(update_timeout) ||
!is_symbol_proc_or_nil(remove_timeout))
rb_raise(rb_eTypeError,
"wrong argument type (expected Symbol, Proc, or nil)");
set_event_func_or_null(add_handle);
set_event_func_or_null(update_handle);
set_event_func_or_null(remove_handle);
set_event_func_or_null(add_timeout);
set_event_func_or_null(update_timeout);
set_event_func_or_null(remove_timeout);
/* virEventRegisterImpl returns void, so no error checking here */
virEventRegisterImpl(add_handle_temp, update_handle_temp,
remove_handle_temp, add_timeout_temp,
update_timeout_temp, remove_timeout_temp);
return Qnil;
}
|
.Libvirt::open(uri = nil) ⇒ Libvirt::Connect
Call virConnectOpen
[http://www.libvirt.org/html/libvirt-libvirt.html#virConnectOpen] to open a connection to a URL.
113 114 115 |
# File 'ext/libvirt/_libvirt.c', line 113
static VALUE libvirt_open(int argc, VALUE *argv, VALUE m) {
return internal_open(argc, argv, m, 0);
}
|
.Libvirt::open_auth(uri = nil, credlist = nil, userdata = nil, flags = 0) {|...| ... } ⇒ Libvirt::Connect
Call virConnectOpenAuth
[http://www.libvirt.org/html/libvirt-libvirt.html#virConnectOpenAuth] to open a connection to a libvirt URI, with a possible authentication block. If an authentication block is desired, then credlist should be an array that specifies which credentials the authentication block is willing to support; the full list is available at libvirt.org/html/libvirt-libvirt.html#virConnectCredentialType. If userdata is not nil and an authentication block is given, userdata will be passed unaltered into the authentication block. The flags parameter controls how to open connection. The only options currently available for flags are 0 for a read/write connection and Libvirt::CONNECT_RO for a read-only connection.
If the credlist is not empty, and an authentication block is given, the authentication block will be called once for each credential necessary to complete the authentication. The authentication block will be passed a single parameter, which is a hash of values containing information necessary to complete authentication. This hash contains 5 elements:
type - the type of credential to be examined
prompt - a suggested prompt to show to the user
challenge - any additional challenge information
defresult - a default result to use if credentials could not be obtained
userdata - the userdata passed into open_auth initially
The authentication block should return the result of collecting the information; these results will then be sent to libvirt for authentication.
227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 |
# File 'ext/libvirt/_libvirt.c', line 227
static VALUE libvirt_open_auth(int argc, VALUE *argv, VALUE m) {
virConnectAuthPtr auth;
VALUE uri;
VALUE credlist;
VALUE userdata;
VALUE flags_val;
char *uri_c;
virConnectPtr conn = NULL;
unsigned int flags;
int auth_alloc;
int i;
VALUE tmp;
int exception = 0;
struct rb_ary_entry_arg args;
struct wrap_callout callargs;
rb_scan_args(argc, argv, "04", &uri, &credlist, &userdata, &flags_val);
/* handle the optional URI */
uri_c = get_string_or_nil(uri);
/* handle the optional flags */
if (NIL_P(flags_val))
flags = 0;
else
flags = NUM2UINT(flags_val);
if (rb_block_given_p()) {
auth = ALLOC(virConnectAuth);
auth_alloc = 1;
if (TYPE(credlist) == T_NIL)
auth->ncredtype = 0;
else if (TYPE(credlist) == T_ARRAY)
auth->ncredtype = RARRAY_LEN(credlist);
else
rb_raise(rb_eTypeError, "wrong argument type (expected Array or nil)");
auth->credtype = NULL;
if (auth->ncredtype > 0) {
/* we don't use ALLOC_N here because that can throw an exception,
* and leak the auth pointer. Instead we use normal malloc
* (which has a slightly higher chance of returning NULL), and
* then properly cleanup if it fails
*/
auth->credtype = malloc(sizeof(int) * auth->ncredtype);
if (auth->credtype == NULL) {
xfree(auth);
rb_memerror();
}
for (i = 0; i < auth->ncredtype; i++) {
args.arr = credlist;
args.elem = i;
tmp = rb_protect(rb_ary_entry_wrap, (VALUE)&args, &exception);
if (exception)
goto do_cleanup;
auth->credtype[i] = rb_protect(rb_num2int_wrap, tmp,
&exception);
if (exception)
goto do_cleanup;
}
}
auth->cb = libvirt_auth_callback_wrapper;
auth->cbdata = (void *)userdata;
}
else {
auth = virConnectAuthPtrDefault;
auth_alloc = 0;
}
callargs.uri = uri_c;
callargs.auth = auth;
callargs.flags = flags;
conn = (virConnectPtr)rb_protect(rb_open_auth_wrap, (VALUE)&callargs,
&exception);
do_cleanup:
if (auth_alloc) {
free(auth->credtype);
xfree(auth);
}
if (exception)
rb_jump_tag(exception);
_E(conn == NULL, create_error(e_ConnectionError, "virConnectOpenAuth",
NULL));
return connect_new(conn);
}
|
.Libvirt::open_read_only(uri = nil) ⇒ Libvirt::Connect
Call virConnectOpenReadOnly
[http://www.libvirt.org/html/libvirt-libvirt.html#virConnectOpenReadOnly] to open a read-only connection to a URL.
125 126 127 |
# File 'ext/libvirt/_libvirt.c', line 125
static VALUE libvirt_open_read_only(int argc, VALUE *argv, VALUE m) {
return internal_open(argc, argv, m, 1);
}
|
.Libvirt::version(type = nil) ⇒ Array
Call virGetVersion
[http://www.libvirt.org/html/libvirt-libvirt.html#virGetVersion] to get the version of libvirt and of the hypervisor TYPE.
61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 |
# File 'ext/libvirt/_libvirt.c', line 61
static VALUE libvirt_version(int argc, VALUE *argv, VALUE m) {
unsigned long libVer;
VALUE type;
unsigned long typeVer;
int r;
VALUE result, rargv[2];
rb_scan_args(argc, argv, "01", &type);
r = virGetVersion(&libVer, get_string_or_nil(type), &typeVer);
_E(r < 0, create_error(rb_eArgError, "virGetVersion", NULL));
result = rb_ary_new2(2);
rargv[0] = rb_str_new2("libvirt");
rargv[1] = ULONG2NUM(libVer);
rb_ary_push(result, rb_class_new_instance(2, rargv, c_libvirt_version));
rargv[0] = type;
rargv[1] = ULONG2NUM(typeVer);
rb_ary_push(result, rb_class_new_instance(2, rargv, c_libvirt_version));
return result;
}
|