forked from xapi-project/xen-api
-
Notifications
You must be signed in to change notification settings - Fork 0
/
xenops_server_simulator.ml
426 lines (370 loc) · 14.6 KB
/
xenops_server_simulator.ml
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 () = ()