Skip to content
This repository

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
tree: 7c62863b04
Fetching contributors…

Cannot retrieve contributors at this time

file 426 lines (370 sloc) 14.947 kb
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426
(*
* Copyright (C) Citrix Systems Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; version 2.1 only. with the special
* exception on linking described in file LICENSE.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*)
open Threadext
open Listext
open Xenops_interface
open Xenops_server_plugin
open Xenops_utils
open Fun
open Xenops_task

module D = Debug.Debugger(struct let name = service_name end)
open D

module Domain = struct
type t = {
domid: int;
uuid: string;
hvm: bool;
domain_action_request: domain_action_request option;
paused: bool;
built: bool;
vcpus: int;
shadow_multiplier: float;
memory_dynamic_min: int64;
memory_dynamic_max: int64;
qemu_created: bool;
suspended: bool;
vbds: Vbd.t list; (* maintained in reverse-plug order *)
vifs: Vif.t list;
pcis: Pci.t list;
xsdata: (string * string) list;
last_create_time: float;
} with rpc
end

module DB = TypedTable(struct
include Domain
let namespace = "domain"
type key = string
let key x = [ x ]
end)

let updates = Updates.empty ()

let next_domid =
let next = ref None in (* unknown *)
let get_next =
fun () -> match !next with
| None ->
let domains = List.filter_map DB.read (DB.list []) in
let domids = List.map (fun x -> x.Domain.domid) domains in
let highest = List.fold_left max 0 domids in
next := Some (highest + 1);
highest + 1
| Some x -> x in
let incr_next () = next := Opt.map (fun x -> x + 1) !next in
fun () ->
let result = get_next () in
incr_next ();
debug "using domid %d" result;
result

let m = Mutex.create ()

let create_nolock _ vm () =
debug "Domain.create vm=%s" vm.Vm.id;
if DB.exists vm.Vm.id then begin
debug "VM.create_nolock %s: Already_exists" vm.Vm.id;
raise (Already_exists("domain", vm.Vm.id))
end else begin
let open Domain in
let domain = {
domid = next_domid ();
uuid = vm.Vm.id;
hvm = (match vm.Vm.ty with Vm.HVM _ -> true | _ -> false);
domain_action_request = None;
paused = true;
built = false;
vcpus = vm.Vm.vcpus;
shadow_multiplier = (match vm.Vm.ty with Vm.HVM { Vm.shadow_multiplier = x } -> x | _ -> 1.);
memory_dynamic_min = vm.Vm.memory_dynamic_min;
memory_dynamic_max = vm.Vm.memory_dynamic_max;
qemu_created = false;
suspended = false;
vifs = [];
vbds = [];
pcis = [];
xsdata = vm.Vm.xsdata;
last_create_time = Unix.gettimeofday ();
} in
DB.write vm.Vm.id domain
end

let get_state_nolock vm () =
if DB.exists vm.Vm.id then begin
let d = DB.read_exn vm.Vm.id in
{ halted_vm with
Vm.power_state = Running;
domids = [ d.Domain.domid ];
vcpu_target = d.Domain.vcpus;
last_start_time = d.Domain.last_create_time;
}
end else halted_vm

let get_domain_action_request_nolock vm () =
if DB.exists vm.Vm.id then begin
let d = DB.read_exn vm.Vm.id in
d.Domain.domain_action_request
end else Some Needs_poweroff

let destroy_nolock vm () =
debug "Domain.destroy vm=%s" vm.Vm.id;
(* Idempotent *)
if DB.exists vm.Vm.id then DB.delete vm.Vm.id

let build_nolock vm vbds vifs () =
debug "Domain.build vm=%s" vm.Vm.id;
debug "setting built <- true";
DB.write vm.Vm.id { DB.read_exn vm.Vm.id with Domain.built = true }

let create_device_model_nolock vm () =
debug "Domain.create_device_model vm=%s" vm.Vm.id;
DB.write vm.Vm.id { DB.read_exn vm.Vm.id with Domain.qemu_created = true }

let destroy_device_model_nolock vm () =
debug "Domain.destroy_device_model vm=%s" vm.Vm.id;
DB.write vm.Vm.id { DB.read_exn vm.Vm.id with Domain.qemu_created = false }

let request_shutdown_nolock vm reason () =
DB.write vm.Vm.id { DB.read_exn vm.Vm.id with Domain.domain_action_request =
Some (match reason with
| Halt | PowerOff -> Needs_poweroff
| Reboot -> Needs_reboot
| Suspend | S3Suspend -> Needs_suspend)
};
Updates.add (Dynamic.Vm vm.Vm.id) updates;
true

let save_nolock vm _ data () =
DB.write vm.Vm.id { DB.read_exn vm.Vm.id with Domain.suspended = true }

let restore_nolock vm vbds vifs data () =
DB.write vm.Vm.id { DB.read_exn vm.Vm.id with Domain.built = true }

let do_pause_unpause_nolock vm paused () =
let d = DB.read_exn vm.Vm.id in
if not d.Domain.built || (d.Domain.hvm && not(d.Domain.qemu_created))
then raise (Domain_not_built)
else DB.write vm.Vm.id { d with Domain.paused = paused }

let do_set_xsdata_nolock vm xsdata () =
let d = DB.read_exn vm.Vm.id in
DB.write vm.Vm.id { d with Domain.xsdata = xsdata }

let do_set_vcpus_nolock vm n () =
let d = DB.read_exn vm.Vm.id in
if not d.Domain.built || (d.Domain.hvm && not(d.Domain.qemu_created))
then raise (Domain_not_built)
else DB.write vm.Vm.id { d with Domain.vcpus = n }

let do_set_shadow_multiplier_nolock vm m () =
let d = DB.read_exn vm.Vm.id in
if not d.Domain.built || (d.Domain.hvm && not(d.Domain.qemu_created))
then raise (Domain_not_built)
else DB.write vm.Vm.id { d with Domain.shadow_multiplier = m }

let do_set_memory_dynamic_range_nolock vm min max () =
let d = DB.read_exn vm.Vm.id in
DB.write vm.Vm.id { d with Domain.memory_dynamic_min = min; memory_dynamic_max = max }

let add_vif vm vif () =
let d = DB.read_exn vm in
let existing_positions = List.map (fun vif -> vif.Vif.position) d.Domain.vifs in
if List.mem vif.Vif.position existing_positions then begin
debug "VIF.plug %s.%s: Already exists" (fst vif.Vif.id) (snd vif.Vif.id);
raise (Already_exists("vif", string_of_int vif.Vif.position))
end else DB.write vm { d with Domain.vifs = vif :: d.Domain.vifs }

let add_vbd (vm: Vm.id) (vbd: Vbd.t) () =
debug "add_vbd";
let d = DB.read_exn vm in
(* there shouldn't be any None values in here anyway *)
let ps = List.map (fun vbd -> vbd.Vbd.position) d.Domain.vbds in
assert (not (List.mem None ps));
let dns = List.map (Opt.unbox) ps in
let indices = List.map Device_number.to_disk_number dns in
let next_index = List.fold_left max (-1) indices + 1 in
let next_dn = Device_number.of_disk_number d.Domain.hvm next_index in
let this_dn = Opt.default next_dn vbd.Vbd.position in
if List.mem this_dn dns then begin
debug "VBD.plug %s.%s: Already exists" (fst vbd.Vbd.id) (snd vbd.Vbd.id);
raise (Already_exists("vbd", Device_number.to_debug_string this_dn))
end else DB.write vm { d with Domain.vbds = { vbd with Vbd.position = Some this_dn } :: d.Domain.vbds }

let move_vif vm vif network () =
let d = DB.read_exn vm in
let this_one x = x.Vif.id = vif.Vif.id in
match List.filter this_one d.Domain.vifs with
| [ vif ] ->
let vifs = List.filter (fun x -> not(this_one x)) d.Domain.vifs in
let vif = { vif with Vif.backend = network } in
DB.write vm { d with Domain.vifs = vif :: vifs }
| [] ->
raise (Does_not_exist("VIF", Printf.sprintf "%s.%s" (fst vif.Vif.id) (snd vif.Vif.id)))
| _ -> assert false (* at most one *)

let add_pci (vm: Vm.id) (pci: Pci.t) () =
debug "add_pci";
let d = DB.read_exn vm in
let existing_positions = List.map (fun pci -> pci.Pci.position) d.Domain.pcis in
if List.mem pci.Pci.position existing_positions then begin
debug "PCI.plug %s.%s: Already exists" (fst pci.Pci.id) (snd pci.Pci.id);
raise (Already_exists("pci", string_of_int pci.Pci.position))
end else DB.write vm { d with Domain.pcis = pci :: d.Domain.pcis }

let pci_state vm pci () =
if not (DB.exists vm)
then unplugged_pci
else
let d = DB.read_exn vm in
let this_one x = x.Pci.id = pci.Pci.id in
match List.filter this_one d.Domain.pcis with
| [ pci ] ->
{
Pci.plugged = true
}
| [] -> unplugged_pci
| _ -> assert false (* at most one *)

let vbd_state vm vbd () =
if not (DB.exists vm)
then unplugged_vbd
else
let d = DB.read_exn vm in
let this_one x = x.Vbd.id = vbd.Vbd.id in
match List.filter this_one d.Domain.vbds with
| [ vbd ] ->
{
unplugged_vbd with
Vbd.plugged = true;
backend_present = vbd.Vbd.backend
}
| [] -> unplugged_vbd
| _ -> assert false (* at most one *)


let vif_state vm vif () =
if not (DB.exists vm)
then unplugged_vif
else
let d = DB.read_exn vm in
let this_one x = x.Vif.id = vif.Vif.id in
match List.filter this_one d.Domain.vifs with
| [ domain ] ->
{
unplugged_vif with
Vif.plugged = true;
}
| [] -> unplugged_vif
| _ -> assert false (* at most one *)

let remove_vif vm vif () =
let d = DB.read_exn vm in
let this_one x = x.Vif.id = vif.Vif.id in
if List.filter this_one d.Domain.vifs = []
then raise (Does_not_exist("VIF", Printf.sprintf "%s.%s" (fst vif.Vif.id) (snd vif.Vif.id)))
else DB.write vm { d with Domain.vifs = List.filter (fun x -> not (this_one x)) d.Domain.vifs }

let set_carrier vm vif carrier () =
let d = DB.read_exn vm in
let this_one x = x.Vif.id = vif.Vif.id in
let vifs = List.map (fun vif -> { vif with Vif.carrier = if this_one vif then carrier else vif.Vif.carrier }) d.Domain.vifs in
DB.write vm { d with Domain.vifs = vifs }

let set_locking_mode vm vif mode () =
let d = DB.read_exn vm in
let this_one x = x.Vif.id = vif.Vif.id in
let vifs = List.map (fun vif -> { vif with Vif.locking_mode = if this_one vif then mode else vif.Vif.locking_mode }) d.Domain.vifs in
DB.write vm { d with Domain.vifs = vifs }

let remove_pci vm pci () =
let d = DB.read_exn vm in
let this_one x = x.Pci.id = pci.Pci.id in
if List.filter this_one d.Domain.pcis = []
then raise (Does_not_exist("PCI", Printf.sprintf "%s.%s" (fst pci.Pci.id) (snd pci.Pci.id)))
else DB.write vm { d with Domain.pcis = List.filter (fun x -> not (this_one x)) d.Domain.pcis }

let remove_vbd vm vbd () =
let d = DB.read_exn vm in
let this_one x = x.Vbd.id = vbd.Vbd.id in
if List.filter this_one d.Domain.vbds = []
then raise (Does_not_exist("VBD", Printf.sprintf "%s.%s" (fst vbd.Vbd.id) (snd vbd.Vbd.id)))
else DB.write vm { d with Domain.vbds = List.filter (fun x -> not (this_one x)) d.Domain.vbds }

let set_qos_vbd vm vbd () =
let d = DB.read_exn vm in
let this_one x = x.Vbd.id = vbd.Vbd.id in
if List.filter this_one d.Domain.vbds = []
then raise (Does_not_exist("VBD", Printf.sprintf "%s.%s" (fst vbd.Vbd.id) (snd vbd.Vbd.id)));
(* XXX *)
()

module HOST = struct
let get_console_data () = "Xen simulator"
let get_total_memory_mib () = Int64.mul 1024L 1024L (* 1 TiB *)
let send_debug_keys _ = ()
end
module VM = struct
let add vm = ()
let remove vm = ()
let create _ memory_limit vm = Mutex.execute m (create_nolock memory_limit vm)
let destroy _ vm = Mutex.execute m (destroy_nolock vm)
let pause _ vm = Mutex.execute m (do_pause_unpause_nolock vm true)
let unpause _ vm = Mutex.execute m (do_pause_unpause_nolock vm false)
let set_xsdata _ vm xs = Mutex.execute m (do_set_xsdata_nolock vm xs)
let set_vcpus _ vm n = Mutex.execute m (do_set_vcpus_nolock vm n)
let set_shadow_multiplier _ vm n = Mutex.execute m (do_set_shadow_multiplier_nolock vm n)
let set_memory_dynamic_range _ vm min max = Mutex.execute m (do_set_memory_dynamic_range_nolock vm min max)
let build _ vm vbds vifs = Mutex.execute m (build_nolock vm vbds vifs)
let create_device_model _ vm vbds vifs _ = Mutex.execute m (create_device_model_nolock vm)
let destroy_device_model _ vm = Mutex.execute m (destroy_device_model_nolock vm)
let request_shutdown _ vm reason ack_delay = Mutex.execute m (request_shutdown_nolock vm reason)
let wait_shutdown _ vm reason timeout = true

let save _ cb vm flags data = Mutex.execute m (save_nolock vm flags data)
let restore _ cb vm vbds vifs data = Mutex.execute m (restore_nolock vm vbds vifs data)

let s3suspend _ vm = ()
let s3resume _ vm = ()

let get_state vm = Mutex.execute m (get_state_nolock vm)

let set_domain_action_request vm request = ()
let get_domain_action_request vm = Mutex.execute m (get_domain_action_request_nolock vm)

let generate_state_string vm = ""
let get_internal_state vdi_map vif_map vm =
let state = Opt.unbox (DB.read vm.Vm.id) in
let vbds = List.map (fun vbd -> {vbd with Vbd.backend = Opt.map (remap_vdi vdi_map) vbd.Vbd.backend}) state.Domain.vbds in
let vifs = List.map (fun vif -> remap_vif vif_map vif) state.Domain.vifs in
{state with Domain.vbds = vbds; Domain.vifs = vifs} |> Domain.rpc_of_t |> Jsonrpc.to_string
let set_internal_state vm s =
DB.write vm.Vm.id (s |> Jsonrpc.of_string |> Domain.t_of_rpc)

let minimum_reboot_delay = 0.
end

module PCI = struct
let plug _ (vm: Vm.id) (pci: Pci.t) = Mutex.execute m (add_pci vm pci)
let unplug _ vm pci = Mutex.execute m (remove_pci vm pci)

let get_state vm pci = Mutex.execute m (pci_state vm pci)

let get_device_action_request vm pci = None
end

module VBD = struct
let set_active _ (vm: Vm.id) (vbd: Vbd.t) (b: bool) = ()
let epoch_begin _ (vm: Vm.id) (disk: disk) = ()
let epoch_end _ (vm: Vm.id) (disk: disk) = ()
let plug _ (vm: Vm.id) (vbd: Vbd.t) = Mutex.execute m (add_vbd vm vbd)
let unplug _ vm vbd _ = Mutex.execute m (remove_vbd vm vbd)

let insert _ vm vbd disk = ()
let eject _ vm vbd = ()

let set_qos _ vm vbd = Mutex.execute m (set_qos_vbd vm vbd)

let get_state vm vbd = Mutex.execute m (vbd_state vm vbd)

let get_device_action_request vm vbd = None
end

module VIF = struct
let set_active _ (vm: Vm.id) (vif: Vif.t) (b: bool) = ()
let plug _ vm vif = Mutex.execute m (add_vif vm vif)
let unplug _ vm vif _ = Mutex.execute m (remove_vif vm vif)
let move _ vm vif network = Mutex.execute m (move_vif vm vif network)
let set_carrier _ vm vif carrier = Mutex.execute m (set_carrier vm vif carrier)
let set_locking_mode _ vm vif mode = Mutex.execute m (set_locking_mode vm vif mode)

let get_state vm vif = Mutex.execute m (vif_state vm vif)

let get_device_action_request vm vif = None
end

module UPDATES = struct
let get last timeout = Updates.get "UPDATES.get" last timeout updates
end

module DEBUG = struct
let trigger cmd args = match cmd, args with
| "reboot", [ k ] ->
let d = DB.read_exn k in
DB.write k { d with Domain.domain_action_request = Some Needs_reboot };
Updates.add (Dynamic.Vm k) updates
| "halt", [ k ] ->
let d = DB.read_exn k in
DB.write k { d with Domain.domain_action_request = Some Needs_poweroff };
Updates.add (Dynamic.Vm k) updates
| "check-vbd-plug-ordering", [ k ] ->
let d = DB.read_exn k in
let open Vbd in
let plug_order = List.rev d.Domain.vbds in
let rw, ro = List.partition (fun vbd -> vbd.mode = ReadWrite) plug_order in
if rw @ ro <> plug_order then begin
debug "DEBUG.trigger: check-vbd-plug-ordering: ordering violation";
raise (Internal_error "check-vbd-plug-ordering")
end
| _ ->
debug "DEBUG.trigger cmd=%s Not_supported" cmd;
raise (Unimplemented(cmd))
end

let init () = ()
Something went wrong with that request. Please try again.