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Revert "bhyve: add command line parameter and parsing for migration"

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Unfortunately, this feature didn't receive much feedback in the past.
However, after committing this, some people came up and complain that
this feature requires some more discussion before upstreaming it.
Additionally, it wasn't a good idea to start this new feature by adding
a new command line parameter as it fixes the user interface.

This reverts commit c9fdd4f3cc.
This commit is contained in:
Corvin Köhne 2023-06-21 08:55:34 +02:00
parent 5bd5470a2c
commit 1e8d0c6cf6
No known key found for this signature in database
GPG Key ID: D854DA56315E026A
8 changed files with 22 additions and 295 deletions
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1
usr.sbin/bhyve/Makefile
View File

@ -88,7 +88,6 @@ SRCS= \
.if ${MK_BHYVE_SNAPSHOT} != "no"
SRCS+= snapshot.c
SRCS+= migration.c
.endif
CFLAGS.kernemu_dev.c+= -I${SRCTOP}/sys/amd64

12
usr.sbin/bhyve/bhyve.8
View File

@ -80,11 +80,6 @@
.Op Fl o Ar var Ns Cm = Ns Ar value
.Op Fl p Ar vcpu Ns Cm \&: Ns Ar hostcpu
.Op Fl r Ar file
.Oo Fl R
.Sm off
.Ar host Op Cm \&: Ar port
.Sm on
.Oc
.Sm off
.Oo Fl s\~
.Ar slot Cm \&, Ar emulation Op Cm \&, Ar conf
@ -281,13 +276,6 @@ and
.Fl l
options.
The count of vCPUs and memory configuration are read from the snapshot.
.It Fl R Ar host Ns Op Cm \&: Ns Ar port
Receive migration from a source guest.
Await for a connection from
.Ar host
on the specified
.Ar port
and resume execution. The default migration port is 24983.
.It Fl S
Wire guest memory.
.It Fl s Cm help

68
usr.sbin/bhyve/bhyverun.c
View File

@ -98,9 +98,6 @@ __FBSDID("$FreeBSD$");
#include "kernemu_dev.h"
#include "mem.h"
#include "mevent.h"
#ifdef BHYVE_SNAPSHOT
#include "migration.h"
#endif
#include "mptbl.h"
#include "pci_emul.h"
#include "pci_irq.h"
@ -234,7 +231,6 @@ usage(int code)
" -p: pin 'vcpu' to 'hostcpu'\n"
#ifdef BHYVE_SNAPSHOT
" -r: path to checkpoint file\n"
" -R: <host[:port]> the source vm host and port for migration\n"
#endif
" -S: guest memory cannot be swapped\n"
" -s: <slot,driver,configinfo> PCI slot config\n"
@ -1082,11 +1078,7 @@ do_open(const char *vmname)
exit(4);
}
} else {
#ifndef BHYVE_SNAPSHOT
if (!romboot) {
#else
if (!romboot && !get_config_bool_default("is_migrated", false)) {
#endif
/*
* If the virtual machine was just created then a
* bootrom must be configured to boot it.
@ -1231,11 +1223,9 @@ main(int argc, char *argv[])
const char *optstr, *value, *vmname;
#ifdef BHYVE_SNAPSHOT
char *restore_file;
char *migration_host;
struct restore_state rstate;
restore_file = NULL;
migration_host = NULL;
#endif
init_config();
@ -1243,7 +1233,7 @@ main(int argc, char *argv[])
progname = basename(argv[0]);
#ifdef BHYVE_SNAPSHOT
optstr = "aehuwxACDHIPSWYk:f:o:p:G:c:s:m:l:K:U:r:R:";
optstr = "aehuwxACDHIPSWYk:f:o:p:G:c:s:m:l:K:U:r:";
#else
optstr = "aehuwxACDHIPSWYk:f:o:p:G:c:s:m:l:K:U:";
#endif
@ -1300,10 +1290,6 @@ main(int argc, char *argv[])
case 'r':
restore_file = optarg;
break;
case 'R':
migration_host = optarg;
set_config_bool("is_migrated", true);
break;
#endif
case 's':
if (strncmp(optarg, "help", strlen(optarg)) == 0) {
@ -1520,51 +1506,38 @@ main(int argc, char *argv[])
spinup_vcpu(&vcpu_info[vcpuid], vcpuid == BSP);
#ifdef BHYVE_SNAPSHOT
if (restore_file != NULL || migration_host != NULL) {
fprintf(stdout, "Pausing pci devs...\n");
if (restore_file != NULL) {
fprintf(stdout, "Pausing pci devs...\r\n");
if (vm_pause_devices() != 0) {
fprintf(stderr, "Failed to pause PCI device state.\n");
exit(1);
}
if (restore_file != NULL) {
fprintf(stdout, "Restoring vm mem...\n");
if (restore_vm_mem(ctx, &rstate) != 0) {
fprintf(stderr,
"Failed to restore VM memory.\n");
exit(1);
}
fprintf(stdout, "Restoring pci devs...\n");
if (vm_restore_devices(&rstate) != 0) {
fprintf(stderr,
"Failed to restore PCI device state.\n");
exit(1);
}
fprintf(stdout, "Restoring kernel structs...\n");
if (vm_restore_kern_structs(ctx, &rstate) != 0) {
fprintf(stderr,
"Failed to restore kernel structs.\n");
exit(1);
}
fprintf(stdout, "Restoring vm mem...\r\n");
if (restore_vm_mem(ctx, &rstate) != 0) {
fprintf(stderr, "Failed to restore VM memory.\n");
exit(1);
}
if (migration_host != NULL) {
fprintf(stdout, "Starting the migration process...\n");
if (receive_vm_migration(ctx, migration_host) != 0) {
fprintf(stderr, "Failed to migrate the vm.\n");
exit(1);
}
fprintf(stdout, "Restoring pci devs...\r\n");
if (vm_restore_devices(&rstate) != 0) {
fprintf(stderr, "Failed to restore PCI device state.\n");
exit(1);
}
fprintf(stdout, "Resuming pci devs...\n");
fprintf(stdout, "Restoring kernel structs...\r\n");
if (vm_restore_kern_structs(ctx, &rstate) != 0) {
fprintf(stderr, "Failed to restore kernel structs.\n");
exit(1);
}
fprintf(stdout, "Resuming pci devs...\r\n");
if (vm_resume_devices() != 0) {
fprintf(stderr, "Failed to resume PCI device state.\n");
exit(1);
}
}
#endif /* BHYVE_SNAPSHOT */
#endif
error = vm_get_register(bsp, VM_REG_GUEST_RIP, &rip);
assert(error == 0);
@ -1632,9 +1605,8 @@ main(int argc, char *argv[])
#endif
#ifdef BHYVE_SNAPSHOT
if (restore_file != NULL)
if (restore_file != NULL) {
destroy_restore_state(&rstate);
if (restore_file != NULL || migration_host != NULL) {
if (vm_restore_time(ctx) < 0)
err(EX_OSERR, "Unable to restore time");

98
usr.sbin/bhyve/migration.c
View File

@ -1,98 +0,0 @@
/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2017-2020 Elena Mihailescu
* Copyright (c) 2017-2020 Darius Mihai
* Copyright (c) 2017-2020 Mihai Carabas
*
* The migration feature was developed under sponsorships
* from Matthew Grooms.
*
*/
#include <sys/param.h>
#include <sys/mman.h>
#include <sys/nv.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <arpa/inet.h>
#ifndef WITHOUT_CAPSICUM
#include <capsicum_helpers.h>
#include <libcasper.h>
#include <casper/cap_net.h>
#include <casper/cap_sysctl.h>
#endif
#include <err.h>
#include <netdb.h>
#include <netinet/in.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <vmmapi.h>
#include "migration.h"
#include "pci_emul.h"
#include "snapshot.h"
#ifdef BHYVE_DEBUG
#define DPRINTF(FMT, ...) \
({ \
fprintf(stderr, "%s: " FMT "\n", __func__, ##__VA_ARGS__); \
})
#else
#define DPRINTF(FMT, ...)
#endif
#define EPRINTF(FMT, ...) \
({ \
fprintf(stderr, "%s: " FMT "\n", __func__, ##__VA_ARGS__); \
})
int
receive_vm_migration(struct vmctx *ctx, char *migration_data)
{
struct migrate_req req;
size_t len;
char *hostname, *pos;
unsigned int port = DEFAULT_MIGRATION_PORT;
int rc;
assert(ctx != NULL);
assert(migration_data != NULL);
memset(req.host, 0, MAXHOSTNAMELEN);
hostname = strdup(migration_data);
if ((pos = strchr(hostname, ':')) != NULL) {
*pos = '\0';
pos = pos + 1;
rc = sscanf(pos, "%u", &port);
if (rc <= 0) {
EPRINTF("Could not parse the port");
free(hostname);
return (EINVAL);
}
}
req.port = port;
len = strlen(hostname);
if (len > MAXHOSTNAMELEN - 1) {
EPRINTF("Hostname length %lu bigger than maximum allowed %d",
len, MAXHOSTNAMELEN - 1);
free(hostname);
return (EINVAL);
}
strlcpy(req.host, hostname, MAXHOSTNAMELEN);
// rc = vm_recv_migrate_req(ctx, req);
rc = EOPNOTSUPP;
EPRINTF("Migration not implemented yet");
free(hostname);
return (rc);
}

27
usr.sbin/bhyve/migration.h
View File

@ -1,27 +0,0 @@
/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2017-2020 Elena Mihailescu
* Copyright (c) 2017-2020 Darius Mihai
* Copyright (c) 2017-2020 Mihai Carabas
*
* The migration feature was developed under sponsorships
* from Matthew Grooms.
*
*/
#pragma once
#include <sys/param.h>
#include <stdbool.h>
#define DEFAULT_MIGRATION_PORT 24983
struct vmctx;
struct migrate_req {
char host[MAXHOSTNAMELEN];
unsigned int port;
};
int receive_vm_migration(struct vmctx *ctx, char *migration_data);

35
usr.sbin/bhyve/snapshot.c
View File

@ -85,7 +85,6 @@ __FBSDID("$FreeBSD$");
#include "ioapic.h"
#include "mem.h"
#include "mevent.h"
#include "migration.h"
#include "mptbl.h"
#include "pci_emul.h"
#include "pci_irq.h"
@ -1400,40 +1399,6 @@ vm_do_checkpoint(struct vmctx *ctx, const nvlist_t *nvl)
}
IPC_COMMAND(ipc_cmd_set, checkpoint, vm_do_checkpoint);
static int
vm_do_migrate(struct vmctx __unused *ctx, const nvlist_t *nvl)
{
size_t len;
struct migrate_req req;
if (!nvlist_exists_string(nvl, "hostname") ||
!nvlist_exists_number(nvl, "port"))
return (EINVAL);
memset(&req, 0, sizeof(struct migrate_req));
req.port = nvlist_get_number(nvl, "port");
len = strlen(nvlist_get_string(nvl, "hostname"));
if (len > MAXHOSTNAMELEN - 1) {
EPRINTLN("Hostname length %lu bigger than maximum allowed %d",
len, MAXHOSTNAMELEN - 1);
return (EINVAL);
}
strlcpy(req.host, nvlist_get_string(nvl, "hostname"), MAXHOSTNAMELEN);
printf("%s: IP address used for migration: %s;\n"
"Port used for migration: %d\n",
__func__,
req.host,
req.port);
// return (vm_send_migrate_req(ctx, req, nvlist_get_bool(nvl, "live")));
EPRINTLN("Migration operation not implemented yet\n");
return (EOPNOTSUPP);
}
IPC_COMMAND(ipc_cmd_set, migrate, vm_do_migrate);
void
init_snapshot(void)
{

19
usr.sbin/bhyvectl/bhyvectl.8
View File

@ -41,11 +41,6 @@
.Op Fl -force-poweroff
.Op Fl -checkpoint= Ns Ar <filename>
.Op Fl -suspend= Ns Ar <filename>
.Oo
.Fl -migrate= Ns Ar host Ns Op Cm \&: Ns Ar port
|
.Fl -migrate-live= Ns Ar host Ns Op Cm \&: Ns Ar port
.Oc
.Sh DESCRIPTION
The
.Nm
@ -90,20 +85,6 @@ Save a snapshot of a virtual machine similar to
.Fl -checkpoint .
The virtual machine will terminate after the snapshot has been
saved.
.It Fl -migrate= Ns Ar host Ns Op Cm \&: Ns Ar port
Warm migrate the virtual machine to a
.Ar host
on the specified
.Ar port .
The default migration port is 24983.
The virtual machine will be destroyed after the migration finishes.
.It Fl -migrate-live= Ns Ar host Ns Op Cm \&: Ns Ar port
Live migrate the virtual machine to a
.Ar host
on the specified
.Ar port .
The default migration port is 24983.
The virtual machine will be destroyed after the migration finishes.
.El
.Sh EXIT STATUS
.Ex -std

57
usr.sbin/bhyvectl/bhyvectl.c
View File

@ -65,7 +65,6 @@ __FBSDID("$FreeBSD$");
#ifdef BHYVE_SNAPSHOT
#include "snapshot.h"
#include "migration.h"
#endif
#define MB (1UL << 20)
@ -88,7 +87,6 @@ usage(bool cpu_intel)
" [--destroy]\n"
#ifdef BHYVE_SNAPSHOT
" [--checkpoint=<filename> | --suspend=<filename>]\n"
" [--migrate=<host>[:<port>] | --migrate-live=<host>[:<port>]]\n"
#endif
" [--get-all]\n"
" [--get-stats]\n"
@ -301,7 +299,6 @@ static int run;
static int get_cpu_topology;
#ifdef BHYVE_SNAPSHOT
static int vm_suspend_opt;
static int vm_migrate_live;
#endif
/*
@ -592,8 +589,6 @@ enum {
#ifdef BHYVE_SNAPSHOT
SET_CHECKPOINT_FILE,
SET_SUSPEND_FILE,
MIGRATE_VM,
MIGRATE_VM_LIVE,
#endif
};
@ -1461,8 +1456,6 @@ setup_options(bool cpu_intel)
#ifdef BHYVE_SNAPSHOT
{ "checkpoint", REQ_ARG, 0, SET_CHECKPOINT_FILE},
{ "suspend", REQ_ARG, 0, SET_SUSPEND_FILE},
{ "migrate", REQ_ARG, 0, MIGRATE_VM},
{ "migrate-live", REQ_ARG, 0, MIGRATE_VM_LIVE},
#endif
};
@ -1750,42 +1743,7 @@ snapshot_request(const char *vmname, char *file, bool suspend)
return (send_message(vmname, nvl));
}
static int
migration_request(const char *vmname, const char *migrate_vm, bool live)
{
nvlist_t *nvl;
char *hostname, *pos;
int rc;
unsigned int port = DEFAULT_MIGRATION_PORT;
hostname = strdup(migrate_vm);
if ((pos = strchr(hostname, ':')) != NULL) {
*pos = '\0';
pos = pos + 1;
rc = sscanf(pos, "%u", &port);
if (rc <= 0) {
fprintf(stderr, "Could not parse the port\n");
free(hostname);
return (EINVAL);
}
}
nvl = nvlist_create(0);
nvlist_add_string(nvl, "cmd", "migrate");
nvlist_add_string(nvl, "hostname", hostname);
nvlist_add_number(nvl, "port", port);
nvlist_add_bool(nvl, "live", live);
free(hostname);
return (send_message(vmname, nvl));
}
#endif /* BHYVE_SNAPSHOT */
#endif
int
main(int argc, char *argv[])
@ -1805,7 +1763,7 @@ main(int argc, char *argv[])
struct tm tm;
struct option *opts;
#ifdef BHYVE_SNAPSHOT
char *checkpoint_file = NULL, *migrate_host = NULL;
char *checkpoint_file = NULL;
#endif
cpu_intel = cpu_vendor_intel();
@ -1974,14 +1932,6 @@ main(int argc, char *argv[])
checkpoint_file = optarg;
vm_suspend_opt = (ch == SET_SUSPEND_FILE);
break;
case MIGRATE_VM:
case MIGRATE_VM_LIVE:
if (migrate_host != NULL)
usage(cpu_intel);
migrate_host = optarg;
vm_migrate_live = (ch == MIGRATE_VM_LIVE);
break;
#endif
default:
usage(cpu_intel);
@ -2464,9 +2414,6 @@ main(int argc, char *argv[])
#ifdef BHYVE_SNAPSHOT
if (!error && checkpoint_file)
error = snapshot_request(vmname, checkpoint_file, vm_suspend_opt);
if (!error && migrate_host)
error = migration_request(vmname, migrate_host, vm_migrate_live);
#endif
free (opts);