1 (** OCaml bindings for libvirt. *)
2 (* (C) Copyright 2007 Richard W.M. Jones, Red Hat Inc.
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2 of the License, or (at your option) any later version,
9 with the OCaml linking exception described in ../COPYING.LIB.
11 This library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with this library; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 {2 Introduction and examples}
24 This is a set of bindings for writing OCaml programs to
25 manage virtual machines through {{:http://libvirt.org/}libvirt}.
27 {3 Using libvirt interactively}
29 Using the interactive toplevel:
33 Objective Caml version 3.10.0
36 # #load "mllibvirt.cma";;
37 # let name = "test:///default";;
38 val name : string = "test:///default"
39 # let conn = Libvirt.Connect.connect_readonly ~name () ;;
40 val conn : Libvirt.ro Libvirt.Connect.t = <abstr>
41 # Libvirt.Connect.get_node_info conn;;
42 : Libvirt.Connect.node_info =
43 {Libvirt.Connect.model = "i686"; Libvirt.Connect.memory = 3145728L;
44 Libvirt.Connect.cpus = 16; Libvirt.Connect.mhz = 1400;
45 Libvirt.Connect.nodes = 2; Libvirt.Connect.sockets = 2;
46 Libvirt.Connect.cores = 2; Libvirt.Connect.threads = 2}
49 {3 Compiling libvirt programs}
51 This command compiles a program to native code:
54 ocamlopt -I +libvirt mllibvirt.cmxa list_domains.ml -o list_domains
57 {3 Example: Connect to the hypervisor}
59 The main modules are {!Libvirt.Connect}, {!Libvirt.Domain} and
60 {!Libvirt.Network} corresponding respectively to the
61 {{:http://libvirt.org/html/libvirt-libvirt.html}virConnect*, virDomain* and virNetwork* functions from libvirt}.
62 For brevity I usually rename these modules like this:
65 module C = Libvirt.Connect
66 module D = Libvirt.Domain
67 module N = Libvirt.Network
70 To get a connection handle, assuming a Xen hypervisor:
74 let conn = C.connect_readonly ~name ()
77 {3 Example: List running domains}
82 let domains = D.get_domains conn [D.ListActive] in
85 printf "%8d %s\n%!" (D.get_id dom) (D.get_name dom)
89 {3 Example: List inactive domains}
92 let domains = D.get_domains conn [D.ListInactive] in
95 printf "inactive %s\n%!" (D.get_name dom)
99 {3 Example: Print node info}
102 let node_info = C.get_node_info conn in
103 printf "model = %s\n" node_info.C.model;
104 printf "memory = %Ld K\n" node_info.C.memory;
105 printf "cpus = %d\n" node_info.C.cpus;
106 printf "mhz = %d\n" node_info.C.mhz;
107 printf "nodes = %d\n" node_info.C.nodes;
108 printf "sockets = %d\n" node_info.C.sockets;
109 printf "cores = %d\n" node_info.C.cores;
110 printf "threads = %d\n%!" node_info.C.threads;
112 let hostname = C.get_hostname conn in
113 printf "hostname = %s\n%!" hostname;
115 let uri = C.get_uri conn in
116 printf "uri = %s\n%!" uri
122 (** {2 Programming issues}
124 {3 General safety issues}
126 Memory allocation / automatic garbage collection of all libvirt
127 objects should be completely safe. If you find any safety issues
128 or if your pure OCaml program ever segfaults, please contact the author.
130 You can force a libvirt object to be freed early by calling
131 the [close] function on the object. This shouldn't affect
132 the safety of garbage collection and should only be used when
133 you want to explicitly free memory. Note that explicitly
134 closing a connection object does nothing if there are still
135 unclosed domain or network objects referencing it.
137 Note that even though you hold open (eg) a domain object, that
138 doesn't mean that the domain (virtual machine) actually exists.
139 The domain could have been shut down or deleted by another user.
140 Thus domain objects can raise odd exceptions at any time.
141 This is just the nature of virtualisation.
143 {3 Backwards and forwards compatibility}
145 OCaml-libvirt requires libvirt version 1.0.2 or later. Future
146 releases of OCaml-libvirt will use newer features of libvirt
147 and therefore will require later versions of libvirt. It is always
148 possible to dynamically link your application against a newer
149 libvirt than OCaml-libvirt was originally compiled against.
151 {3 Get list of domains and domain infos}
153 This is a very common operation, and libvirt supports various
154 different methods to do it. We have hidden the complexity in a
155 flexible {!Libvirt.Domain.get_domains} and
156 {!Libvirt.Domain.get_domains_and_infos} calls which is easy to use and
157 automatically chooses the most efficient method depending on the
158 version of libvirt in use.
162 You can issue multiple concurrent libvirt requests in
163 different threads. However you must follow this rule:
164 Each thread must have its own separate libvirt connection, {i or}
165 you must implement your own mutex scheme to ensure that no
166 two threads can ever make concurrent calls using the same
169 (Note that multithreaded code is not well tested. If you find
170 bugs please report them.)
174 Libvirt requires all callers to call virInitialize before
175 using the library. This is done automatically for you by
176 these bindings when the program starts up, and we believe
177 that the way this is done is safe.
183 (** This is a "raw" UUID, ie. a packed string of bytes. *)
186 (** Type of XML (an uninterpreted string of bytes). Use PXP, expat,
187 xml-light, etc. if you want to do anything useful with the XML.
190 type filename = string
193 val get_version : ?driver:string -> unit -> int * int
194 (** [get_version ()] returns the library version in the first part
195 of the tuple, and [0] in the second part.
197 [get_version ~driver ()] returns the library version in the first
198 part of the tuple, and the version of the driver called [driver]
201 The version numbers are encoded as
202 1,000,000 * major + 1,000 * minor + release.
205 val uuid_length : int
206 (** Length of packed UUIDs. *)
208 val uuid_string_length : int
209 (** Length of UUID strings. *)
214 {{:http://caml.inria.fr/pub/ml-archives/caml-list/2004/07/80683af867cce6bf8fff273973f70c95.en.html}phantom types}
215 are used to ensure the type-safety of read-only
216 versus read-write connections.
218 All connection/domain/etc. objects are marked with
219 a phantom read-write or read-only type, and trying to
220 pass a read-only object into a function which could
221 mutate the object will cause a compile time error.
223 Each module provides a function like {!Libvirt.Connect.const}
224 to demote a read-write object into a read-only object. The
225 opposite operation is, of course, not allowed.
227 If you want to handle both read-write and read-only
228 connections at runtime, use a variant similar to this:
232 | Read_only of Libvirt.ro Libvirt.Connect.t
233 | Read_write of Libvirt.rw Libvirt.Connect.t
237 (** {3 Forward definitions}
239 These definitions are placed here to avoid the need to
240 use recursive module dependencies.
243 (** {3 Connections} *)
248 (** Connection. Read-only connections have type [ro Connect.t] and
249 read-write connections have type [rw Connect.t].
253 model : string; (** CPU model *)
254 memory : int64; (** memory size in kilobytes *)
255 cpus : int; (** number of active CPUs *)
256 mhz : int; (** expected CPU frequency *)
257 nodes : int; (** number of NUMA nodes (1 = UMA) *)
258 sockets : int; (** number of CPU sockets per node *)
259 cores : int; (** number of cores per socket *)
260 threads : int; (** number of threads per core *)
263 val connect : ?name:string -> unit -> rw t
264 val connect_readonly : ?name:string -> unit -> ro t
265 (** [connect ~name ()] connects to the hypervisor with URI [name].
267 [connect ()] connects to the default hypervisor.
269 [connect_readonly] is the same but connects in read-only mode.
272 val close : [>`R] t -> unit
273 (** [close conn] closes and frees the connection object in memory.
275 The connection is automatically closed if it is garbage
276 collected. This function just forces it to be closed
277 and freed right away.
280 val get_type : [>`R] t -> string
281 (** Returns the name of the driver (hypervisor). *)
283 val get_version : [>`R] t -> int
284 (** Returns the driver version
285 [major * 1_000_000 + minor * 1000 + release]
287 val get_hostname : [>`R] t -> string
288 (** Returns the hostname of the physical server. *)
289 val get_uri : [>`R] t -> string
290 (** Returns the canonical connection URI. *)
291 val get_max_vcpus : [>`R] t -> ?type_:string -> unit -> int
292 (** Returns the maximum number of virtual CPUs
293 supported by a guest VM of a particular type. *)
294 val list_domains : [>`R] t -> int -> int array
295 (** [list_domains conn max] returns the running domain IDs,
296 up to a maximum of [max] entries.
298 Call {!num_of_domains} first to get a value for [max].
301 {!Libvirt.Domain.get_domains},
302 {!Libvirt.Domain.get_domains_and_infos}.
304 val num_of_domains : [>`R] t -> int
305 (** Returns the number of running domains. *)
306 val get_capabilities : [>`R] t -> xml
307 (** Returns the hypervisor capabilities (as XML). *)
308 val num_of_defined_domains : [>`R] t -> int
309 (** Returns the number of inactive (shutdown) domains. *)
310 val list_defined_domains : [>`R] t -> int -> string array
311 (** [list_defined_domains conn max]
312 returns the names of the inactive domains, up to
313 a maximum of [max] entries.
315 Call {!num_of_defined_domains} first to get a value for [max].
318 {!Libvirt.Domain.get_domains},
319 {!Libvirt.Domain.get_domains_and_infos}.
321 val num_of_networks : [>`R] t -> int
322 (** Returns the number of networks. *)
323 val list_networks : [>`R] t -> int -> string array
324 (** [list_networks conn max]
325 returns the names of the networks, up to a maximum
327 Call {!num_of_networks} first to get a value for [max].
329 val num_of_defined_networks : [>`R] t -> int
330 (** Returns the number of inactive networks. *)
331 val list_defined_networks : [>`R] t -> int -> string array
332 (** [list_defined_networks conn max]
333 returns the names of the inactive networks, up to a maximum
335 Call {!num_of_defined_networks} first to get a value for [max].
338 val num_of_pools : [>`R] t -> int
339 (** Returns the number of storage pools. *)
340 val list_pools : [>`R] t -> int -> string array
341 (** Return list of storage pools. *)
342 val num_of_defined_pools : [>`R] t -> int
343 (** Returns the number of storage pools. *)
344 val list_defined_pools : [>`R] t -> int -> string array
345 (** Return list of storage pools. *)
347 (* The name of this function is inconsistent, but the inconsistency
348 * is really in libvirt itself.
350 val get_node_info : [>`R] t -> node_info
351 (** Return information about the physical server. *)
353 val node_get_free_memory : [> `R] t -> int64
355 [node_get_free_memory conn]
356 returns the amount of free memory (not allocated to any guest)
360 val node_get_cells_free_memory : [> `R] t -> int -> int -> int64 array
362 [node_get_cells_free_memory conn start max]
363 returns the amount of free memory on each NUMA cell in kilobytes.
364 [start] is the first cell for which we return free memory.
365 [max] is the maximum number of cells for which we return free memory.
366 Returns an array of up to [max] entries in length.
369 val maxcpus_of_node_info : node_info -> int
370 (** Calculate the total number of CPUs supported (but not necessarily
374 val cpumaplen : int -> int
375 (** Calculate the length (in bytes) required to store the complete
376 CPU map between a single virtual and all physical CPUs of a domain.
379 val use_cpu : string -> int -> unit
380 (** [use_cpu cpumap cpu] marks [cpu] as usable in [cpumap]. *)
381 val unuse_cpu : string -> int -> unit
382 (** [unuse_cpu cpumap cpu] marks [cpu] as not usable in [cpumap]. *)
383 val cpu_usable : string -> int -> int -> int -> bool
384 (** [cpu_usable cpumaps maplen vcpu cpu] checks returns true iff the
385 [cpu] is usable by [vcpu]. *)
387 val set_keep_alive : [>`R] t -> int -> int -> unit
388 (** [set_keep_alive conn interval count] starts sending keepalive
389 messages after [interval] seconds of inactivity and consider the
390 connection to be broken when no response is received after [count]
392 Note: the client has to implement and run an event loop to
393 be able to use keep-alive messages. *)
395 external const : [>`R] t -> ro t = "%identity"
396 (** [const conn] turns a read/write connection into a read-only
397 connection. Note that the opposite operation is impossible.
400 (** Module dealing with connections. [Connect.t] is the
401 connection object. *)
408 (** Domain handle. Read-only handles have type [ro Domain.t] and
409 read-write handles have type [rw Domain.t].
413 | InfoNoState | InfoRunning | InfoBlocked | InfoPaused
414 | InfoShutdown | InfoShutoff | InfoCrashed
417 state : state; (** running state *)
418 max_mem : int64; (** maximum memory in kilobytes *)
419 memory : int64; (** memory used in kilobytes *)
420 nr_virt_cpu : int; (** number of virtual CPUs *)
421 cpu_time : int64; (** CPU time used in nanoseconds *)
424 type vcpu_state = VcpuOffline | VcpuRunning | VcpuBlocked
427 number : int; (** virtual CPU number *)
428 vcpu_state : vcpu_state; (** state *)
429 vcpu_time : int64; (** CPU time used in nanoseconds *)
430 cpu : int; (** real CPU number, -1 if offline *)
433 type sched_param = string * sched_param_value
434 and sched_param_value =
435 | SchedFieldInt32 of int32 | SchedFieldUInt32 of int32
436 | SchedFieldInt64 of int64 | SchedFieldUInt64 of int64
437 | SchedFieldFloat of float | SchedFieldBool of bool
439 type typed_param = string * typed_param_value
440 and typed_param_value =
441 | TypedFieldInt32 of int32 | TypedFieldUInt32 of int32
442 | TypedFieldInt64 of int64 | TypedFieldUInt64 of int64
443 | TypedFieldFloat of float | TypedFieldBool of bool
444 | TypedFieldString of string
446 type migrate_flag = Live
448 type memory_flag = Virtual
463 type interface_stats = {
474 val max_peek : [>`R] t -> int
475 (** Maximum size supported by the {!block_peek} and {!memory_peek}
476 functions. If you want to peek more than this then you must
477 break your request into chunks. *)
479 val create_linux : [>`W] Connect.t -> xml -> rw t
480 (** Create a new guest domain (not necessarily a Linux one)
483 val lookup_by_id : 'a Connect.t -> int -> 'a t
484 (** Lookup a domain by ID. *)
485 val lookup_by_uuid : 'a Connect.t -> uuid -> 'a t
486 (** Lookup a domain by UUID. This uses the packed byte array UUID. *)
487 val lookup_by_uuid_string : 'a Connect.t -> string -> 'a t
488 (** Lookup a domain by (string) UUID. *)
489 val lookup_by_name : 'a Connect.t -> string -> 'a t
490 (** Lookup a domain by name. *)
491 val destroy : [>`W] t -> unit
492 (** Abruptly destroy a domain. *)
493 val free : [>`R] t -> unit
494 (** [free domain] frees the domain object in memory.
496 The domain object is automatically freed if it is garbage
497 collected. This function just forces it to be freed right
501 val suspend : [>`W] t -> unit
502 (** Suspend a domain. *)
503 val resume : [>`W] t -> unit
504 (** Resume a domain. *)
505 val save : [>`W] t -> filename -> unit
506 (** Suspend a domain, then save it to the file. *)
507 val restore : [>`W] Connect.t -> filename -> unit
508 (** Restore a domain from a file. *)
509 val core_dump : [>`W] t -> filename -> unit
510 (** Force a domain to core dump to the named file. *)
511 val shutdown : [>`W] t -> unit
512 (** Shutdown a domain. *)
513 val reboot : [>`W] t -> unit
514 (** Reboot a domain. *)
515 val get_name : [>`R] t -> string
516 (** Get the domain name. *)
517 val get_uuid : [>`R] t -> uuid
518 (** Get the domain UUID (as a packed byte array). *)
519 val get_uuid_string : [>`R] t -> string
520 (** Get the domain UUID (as a printable string). *)
521 val get_id : [>`R] t -> int
522 (** [get_id dom] returns the ID of the domain. In most cases
523 this returns [-1] if the domain is not running. *)
524 val get_os_type : [>`R] t -> string
525 (** Get the operating system type. *)
526 val get_max_memory : [>`R] t -> int64
527 (** Get the maximum memory allocation. *)
528 val set_max_memory : [>`W] t -> int64 -> unit
529 (** Set the maximum memory allocation. *)
530 val set_memory : [>`W] t -> int64 -> unit
531 (** Set the normal memory allocation. *)
532 val get_info : [>`R] t -> info
533 (** Get information about a domain. *)
534 val get_xml_desc : [>`R] t -> xml
535 (** Get the XML description of a domain. *)
536 val get_scheduler_type : [>`R] t -> string * int
537 (** Get the scheduler type. *)
538 val get_scheduler_parameters : [>`R] t -> int -> sched_param array
539 (** Get the array of scheduler parameters. *)
540 val set_scheduler_parameters : [>`W] t -> sched_param array -> unit
541 (** Set the array of scheduler parameters. *)
542 val define_xml : [>`W] Connect.t -> xml -> rw t
543 (** Define a new domain (but don't start it up) from the XML. *)
544 val undefine : [>`W] t -> unit
545 (** Undefine a domain - removes its configuration. *)
546 val create : [>`W] t -> unit
547 (** Launch a defined (inactive) domain. *)
548 val get_autostart : [>`R] t -> bool
549 (** Get the autostart flag for a domain. *)
550 val set_autostart : [>`W] t -> bool -> unit
551 (** Set the autostart flag for a domain. *)
552 val set_vcpus : [>`W] t -> int -> unit
553 (** Change the number of vCPUs available to a domain. *)
554 val pin_vcpu : [>`W] t -> int -> string -> unit
555 (** [pin_vcpu dom vcpu bitmap] pins a domain vCPU to a bitmap of physical
556 CPUs. See the libvirt documentation for details of the
557 layout of the bitmap. *)
558 val get_vcpus : [>`R] t -> int -> int -> int * vcpu_info array * string
559 (** [get_vcpus dom maxinfo maplen] returns the pinning information
560 for a domain. See the libvirt documentation for details
561 of the array and bitmap returned from this function.
563 val get_cpu_stats : [>`R] t -> typed_param list array
564 (** [get_pcpu_stats dom] returns the physical CPU stats
565 for a domain. See the libvirt documentation for details.
567 val get_max_vcpus : [>`R] t -> int
568 (** Returns the maximum number of vCPUs supported for this domain. *)
569 val attach_device : [>`W] t -> xml -> unit
570 (** Attach a device (described by the device XML) to a domain. *)
571 val detach_device : [>`W] t -> xml -> unit
572 (** Detach a device (described by the device XML) from a domain. *)
574 val migrate : [>`W] t -> [>`W] Connect.t -> migrate_flag list ->
575 ?dname:string -> ?uri:string -> ?bandwidth:int -> unit -> rw t
576 (** [migrate dom dconn flags ()] migrates a domain to a
577 destination host described by [dconn].
579 The optional flag [?dname] is used to rename the domain.
581 The optional flag [?uri] is used to route the migration.
583 The optional flag [?bandwidth] is used to limit the bandwidth
584 used for migration (in Mbps). *)
586 val block_stats : [>`R] t -> string -> block_stats
587 (** Returns block device stats. *)
588 val interface_stats : [>`R] t -> string -> interface_stats
589 (** Returns network interface stats. *)
591 val block_peek : [>`W] t -> string -> int64 -> int -> string -> int -> unit
592 (** [block_peek dom path offset size buf boff] reads [size] bytes at
593 [offset] in the domain's [path] block device.
595 If successful then the data is written into [buf] starting
596 at offset [boff], for [size] bytes.
598 See also {!max_peek}. *)
599 val memory_peek : [>`W] t -> memory_flag list -> int64 -> int ->
600 string -> int -> unit
601 (** [memory_peek dom Virtual offset size] reads [size] bytes
602 at [offset] in the domain's virtual memory.
604 If successful then the data is written into [buf] starting
605 at offset [boff], for [size] bytes.
607 See also {!max_peek}. *)
609 external const : [>`R] t -> ro t = "%identity"
610 (** [const dom] turns a read/write domain handle into a read-only
611 domain handle. Note that the opposite operation is impossible.
614 val get_domains : ([>`R] as 'a) Connect.t -> list_flag list -> 'a t list
615 (** Get the active and/or inactive domains using the most
616 efficient method available.
619 {!get_domains_and_infos},
620 {!Connect.list_domains},
621 {!Connect.list_defined_domains}.
624 val get_domains_and_infos : ([>`R] as 'a) Connect.t -> list_flag list ->
626 (** This gets the active and/or inactive domains and the
627 domain info for each one using the most efficient
632 {!Connect.list_domains},
633 {!Connect.list_defined_domains},
638 (** Module dealing with domains. [Domain.t] is the
646 (** Network handle. Read-only handles have type [ro Network.t] and
647 read-write handles have type [rw Network.t].
650 val lookup_by_name : 'a Connect.t -> string -> 'a t
651 (** Lookup a network by name. *)
652 val lookup_by_uuid : 'a Connect.t -> uuid -> 'a t
653 (** Lookup a network by (packed) UUID. *)
654 val lookup_by_uuid_string : 'a Connect.t -> string -> 'a t
655 (** Lookup a network by UUID string. *)
656 val create_xml : [>`W] Connect.t -> xml -> rw t
657 (** Create a network. *)
658 val define_xml : [>`W] Connect.t -> xml -> rw t
659 (** Define but don't activate a network. *)
660 val undefine : [>`W] t -> unit
661 (** Undefine configuration of a network. *)
662 val create : [>`W] t -> unit
663 (** Start up a defined (inactive) network. *)
664 val destroy : [>`W] t -> unit
665 (** Destroy a network. *)
666 val free : [>`R] t -> unit
667 (** [free network] frees the network object in memory.
669 The network object is automatically freed if it is garbage
670 collected. This function just forces it to be freed right
674 val get_name : [>`R] t -> string
675 (** Get network name. *)
676 val get_uuid : [>`R] t -> uuid
677 (** Get network packed UUID. *)
678 val get_uuid_string : [>`R] t -> string
679 (** Get network UUID as a printable string. *)
680 val get_xml_desc : [>`R] t -> xml
681 (** Get XML description of a network. *)
682 val get_bridge_name : [>`R] t -> string
683 (** Get bridge device name of a network. *)
684 val get_autostart : [>`R] t -> bool
685 (** Get the autostart flag for a network. *)
686 val set_autostart : [>`W] t -> bool -> unit
687 (** Set the autostart flag for a network. *)
689 external const : [>`R] t -> ro t = "%identity"
690 (** [const network] turns a read/write network handle into a read-only
691 network handle. Note that the opposite operation is impossible.
694 (** Module dealing with networks. [Network.t] is the
697 (** {3 Storage pools} *)
702 (** Storage pool handle. *)
704 type pool_state = Inactive | Building | Running | Degraded
705 (** State of the storage pool. *)
707 type pool_build_flags = New | Repair | Resize
708 (** Flags for creating a storage pool. *)
710 type pool_delete_flags = Normal | Zeroed
711 (** Flags for deleting a storage pool. *)
714 state : pool_state; (** Pool state. *)
715 capacity : int64; (** Logical size in bytes. *)
716 allocation : int64; (** Currently allocated in bytes. *)
717 available : int64; (** Remaining free space bytes. *)
720 val lookup_by_name : 'a Connect.t -> string -> 'a t
721 val lookup_by_uuid : 'a Connect.t -> uuid -> 'a t
722 val lookup_by_uuid_string : 'a Connect.t -> string -> 'a t
723 (** Look up a storage pool by name, UUID or UUID string. *)
725 val create_xml : [>`W] Connect.t -> xml -> rw t
726 (** Create a storage pool. *)
727 val define_xml : [>`W] Connect.t -> xml -> rw t
728 (** Define but don't activate a storage pool. *)
729 val build : [>`W] t -> pool_build_flags -> unit
730 (** Build a storage pool. *)
731 val undefine : [>`W] t -> unit
732 (** Undefine configuration of a storage pool. *)
733 val create : [>`W] t -> unit
734 (** Start up a defined (inactive) storage pool. *)
735 val destroy : [>`W] t -> unit
736 (** Destroy a storage pool. *)
737 val delete : [>`W] t -> unit
738 (** Delete a storage pool. *)
739 val free : [>`R] t -> unit
740 (** Free a storage pool object in memory.
742 The storage pool object is automatically freed if it is garbage
743 collected. This function just forces it to be freed right
746 val refresh : [`R] t -> unit
747 (** Refresh the list of volumes in the storage pool. *)
749 val get_name : [`R] t -> string
750 (** Name of the pool. *)
751 val get_uuid : [`R] t -> uuid
752 (** Get the UUID (as a packed byte array). *)
753 val get_uuid_string : [`R] t -> string
754 (** Get the UUID (as a printable string). *)
755 val get_info : [`R] t -> pool_info
756 (** Get information about the pool. *)
757 val get_xml_desc : [`R] t -> xml
758 (** Get the XML description. *)
759 val get_autostart : [`R] t -> bool
760 (** Get the autostart flag for the storage pool. *)
761 val set_autostart : [>`W] t -> bool -> unit
762 (** Set the autostart flag for the storage pool. *)
764 val num_of_volumes : [`R] t -> int
765 (** Returns the number of storage volumes within the storage pool. *)
766 val list_volumes : [`R] t -> int -> string array
767 (** Return list of storage volumes. *)
769 external const : [>`R] t -> ro t = "%identity"
770 (** [const conn] turns a read/write storage pool into a read-only
771 pool. Note that the opposite operation is impossible.
774 (** Module dealing with storage pools. *)
776 (** {3 Storage volumes} *)
781 (** Storage volume handle. *)
783 type vol_type = File | Block
784 (** Type of a storage volume. *)
786 type vol_delete_flags = Normal | Zeroed
787 (** Flags for deleting a storage volume. *)
790 typ : vol_type; (** Type of storage volume. *)
791 capacity : int64; (** Logical size in bytes. *)
792 allocation : int64; (** Currently allocated in bytes. *)
795 val lookup_by_name : 'a Pool.t -> string -> 'a t
796 val lookup_by_key : 'a Connect.t -> string -> 'a t
797 val lookup_by_path : 'a Connect.t -> string -> 'a t
798 (** Look up a storage volume by name, key or path volume. *)
800 val pool_of_volume : 'a t -> 'a Pool.t
801 (** Get the storage pool containing this volume. *)
803 val get_name : [`R] t -> string
804 (** Name of the volume. *)
805 val get_key : [`R] t -> string
806 (** Key of the volume. *)
807 val get_path : [`R] t -> string
808 (** Path of the volume. *)
809 val get_info : [`R] t -> vol_info
810 (** Get information about the storage volume. *)
811 val get_xml_desc : [`R] t -> xml
812 (** Get the XML description. *)
814 val create_xml : [>`W] Pool.t -> xml -> unit
815 (** Create a storage volume. *)
816 val delete : [>`W] t -> vol_delete_flags -> unit
817 (** Delete a storage volume. *)
818 val free : [>`R] t -> unit
819 (** Free a storage volume object in memory.
821 The storage volume object is automatically freed if it is garbage
822 collected. This function just forces it to be freed right
826 external const : [>`R] t -> ro t = "%identity"
827 (** [const conn] turns a read/write storage volume into a read-only
828 volume. Note that the opposite operation is impossible.
831 (** Module dealing with storage volumes. *)
833 (** {3 Error handling and exceptions} *)
839 | VIR_ERR_INTERNAL_ERROR
842 | VIR_ERR_UNKNOWN_HOST
844 | VIR_ERR_INVALID_CONN
845 | VIR_ERR_INVALID_DOMAIN
846 | VIR_ERR_INVALID_ARG
847 | VIR_ERR_OPERATION_FAILED
849 | VIR_ERR_POST_FAILED
851 | VIR_ERR_SEXPR_SERIAL
862 | VIR_ERR_NO_XENSTORE
863 | VIR_ERR_DRIVER_FULL
864 | VIR_ERR_CALL_FAILED
867 | VIR_ERR_OPERATION_DENIED
868 | VIR_ERR_OPEN_FAILED
869 | VIR_ERR_READ_FAILED
870 | VIR_ERR_PARSE_FAILED
871 | VIR_ERR_CONF_SYNTAX
872 | VIR_ERR_WRITE_FAILED
874 | VIR_ERR_INVALID_NETWORK
875 | VIR_ERR_NETWORK_EXIST
876 | VIR_ERR_SYSTEM_ERROR
878 | VIR_ERR_GNUTLS_ERROR
882 | VIR_ERR_INVALID_MAC
883 | VIR_ERR_AUTH_FAILED
884 | VIR_ERR_INVALID_STORAGE_POOL
885 | VIR_ERR_INVALID_STORAGE_VOL
887 | VIR_ERR_NO_STORAGE_POOL
888 | VIR_ERR_NO_STORAGE_VOL
889 (* ^^ NB: If you add a variant you MUST edit
890 libvirt_c_epilogue.c:MAX_VIR_* *)
891 | VIR_ERR_UNKNOWN of int
892 (** See [<libvirt/virterror.h>] for meaning of these codes. *)
894 val string_of_code : code -> string
913 | VIR_FROM_STATS_LINUX
915 (* ^^ NB: If you add a variant you MUST edit
916 libvirt_c_epilogue.c: MAX_VIR_* *)
917 | VIR_FROM_UNKNOWN of int
918 (** Subsystem / driver which produced the error. *)
920 val string_of_domain : domain -> string
926 (* ^^ NB: If you add a variant you MUST edit libvirt_c.c: MAX_VIR_* *)
927 | VIR_ERR_UNKNOWN_LEVEL of int
928 (** No error, a warning or an error. *)
930 val string_of_level : level -> string
933 code : code; (** Error code. *)
934 domain : domain; (** Origin of the error. *)
935 message : string option; (** Human-readable message. *)
936 level : level; (** Error or warning. *)
937 str1 : string option; (** Informational string. *)
938 str2 : string option; (** Informational string. *)
939 str3 : string option; (** Informational string. *)
940 int1 : int32; (** Informational integer. *)
941 int2 : int32; (** Informational integer. *)
943 (** An error object. *)
945 val to_string : t -> string
946 (** Turn the exception into a printable string. *)
948 val get_last_error : unit -> t option
949 val get_last_conn_error : [>`R] Connect.t -> t option
950 (** Get the last error at a global or connection level.
952 Normally you do not need to use these functions because
953 the library automatically turns errors into exceptions.
956 val reset_last_error : unit -> unit
957 val reset_last_conn_error : [>`R] Connect.t -> unit
958 (** Reset the error at a global or connection level.
960 Normally you do not need to use these functions.
963 val no_error : unit -> t
964 (** Creates an empty error message.
966 Normally you do not need to use this function.
969 (** Module dealing with errors. *)
971 exception Virterror of Virterror.t
972 (** This exception can be raised by any library function that detects
973 an error. To get a printable error message, call
974 {!Virterror.to_string} on the content of this exception.
977 exception Not_supported of string
980 [Not_supported "virFoo"]
981 (where [virFoo] is the libvirt function name) if a function is
982 not supported at either compile or run time. This applies to
983 any libvirt function added after version 0.2.1.
985 See also {{:http://libvirt.org/hvsupport.html}http://libvirt.org/hvsupport.html}
988 (** {3 Utility functions} *)
990 val map_ignore_errors : ('a -> 'b) -> 'a list -> 'b list
991 (** [map_ignore_errors f xs] calls function [f] for each element of [xs].
993 This is just like [List.map] except that if [f x] throws a
994 {!Virterror.t} exception, the error is ignored and [f x]
995 is not returned in the final list.
997 This function is primarily useful when dealing with domains which
998 might 'disappear' asynchronously from the currently running