From bff046f86b4f8970c722c3bc3e32173b8000e716 Mon Sep 17 00:00:00 2001 From: Luiz Capitulino Date: Fri, 29 Jul 2011 13:37:55 -0300 Subject: Move vm_state_notify() prototype from cpus.h to sysemu.h It's where all the state handling functions prototypes are located. Signed-off-by: Luiz Capitulino --- cpus.h | 1 - sysemu.h | 1 + 2 files changed, 1 insertion(+), 1 deletion(-) diff --git a/cpus.h b/cpus.h index f42b54e39c..58858855ff 100644 --- a/cpus.h +++ b/cpus.h @@ -15,7 +15,6 @@ void cpu_synchronize_all_post_init(void); /* vl.c */ extern int smp_cores; extern int smp_threads; -void vm_state_notify(int running, int reason); bool cpu_exec_all(void); void set_numa_modes(void); void set_cpu_log(const char *optarg); diff --git a/sysemu.h b/sysemu.h index 9090457881..eb66af5e55 100644 --- a/sysemu.h +++ b/sysemu.h @@ -23,6 +23,7 @@ typedef void VMChangeStateHandler(void *opaque, int running, int reason); VMChangeStateEntry *qemu_add_vm_change_state_handler(VMChangeStateHandler *cb, void *opaque); void qemu_del_vm_change_state_handler(VMChangeStateEntry *e); +void vm_state_notify(int running, int reason); #define VMSTOP_USER 0 #define VMSTOP_DEBUG 1 -- cgit v1.2.1 From 1dfb4dd993f7122353fb2894f09dfcba894cd7d5 Mon Sep 17 00:00:00 2001 From: Luiz Capitulino Date: Fri, 29 Jul 2011 14:26:33 -0300 Subject: Replace the VMSTOP macros with a proper state type Today, when notifying a VM state change with vm_state_notify(), we pass a VMSTOP macro as the 'reason' argument. This is not ideal because the VMSTOP macros tell why qemu stopped and not exactly what the current VM state is. One example to demonstrate this problem is that vm_start() calls vm_state_notify() with reason=0, which turns out to be VMSTOP_USER. This commit fixes that by replacing the VMSTOP macros with a proper state type called RunState. Signed-off-by: Luiz Capitulino --- audio/audio.c | 2 +- cpus.c | 10 +++++----- gdbstub.c | 30 +++++++++++++++--------------- hw/ide/ahci.c | 2 +- hw/ide/core.c | 4 ++-- hw/ide/internal.h | 3 ++- hw/ide/pci.c | 2 +- hw/kvmclock.c | 3 ++- hw/qxl.c | 5 +++-- hw/scsi-disk.c | 4 ++-- hw/virtio-blk.c | 5 +++-- hw/virtio.c | 2 +- hw/watchdog.c | 2 +- kvm-all.c | 2 +- migration.c | 2 +- monitor.c | 4 ++-- qemu-timer.c | 3 ++- savevm.c | 4 ++-- sysemu.h | 33 +++++++++++++++++++-------------- target-i386/kvm.c | 2 +- ui/spice-display.c | 3 ++- ui/spice-display.h | 4 +++- vl.c | 26 +++++++++++++------------- xen-all.c | 10 ++++++---- 24 files changed, 91 insertions(+), 76 deletions(-) diff --git a/audio/audio.c b/audio/audio.c index 5649075b01..50d0d7183f 100644 --- a/audio/audio.c +++ b/audio/audio.c @@ -1743,7 +1743,7 @@ static int audio_driver_init (AudioState *s, struct audio_driver *drv) } static void audio_vm_change_state_handler (void *opaque, int running, - int reason) + RunState state) { AudioState *s = opaque; HWVoiceOut *hwo = NULL; diff --git a/cpus.c b/cpus.c index 54c188cf5c..76a79ac7d4 100644 --- a/cpus.c +++ b/cpus.c @@ -118,13 +118,13 @@ int cpu_is_stopped(CPUState *env) return !vm_running || env->stopped; } -static void do_vm_stop(int reason) +static void do_vm_stop(RunState state) { if (vm_running) { cpu_disable_ticks(); vm_running = 0; pause_all_vcpus(); - vm_state_notify(0, reason); + vm_state_notify(0, state); qemu_aio_flush(); bdrv_flush_all(); monitor_protocol_event(QEVENT_STOP, NULL); @@ -878,10 +878,10 @@ void cpu_stop_current(void) } } -void vm_stop(int reason) +void vm_stop(RunState state) { if (!qemu_thread_is_self(&io_thread)) { - qemu_system_vmstop_request(reason); + qemu_system_vmstop_request(state); /* * FIXME: should not return to device code in case * vm_stop() has been requested. @@ -889,7 +889,7 @@ void vm_stop(int reason) cpu_stop_current(); return; } - do_vm_stop(reason); + do_vm_stop(state); } static int tcg_cpu_exec(CPUState *env) diff --git a/gdbstub.c b/gdbstub.c index 90683a46c3..75b52e2c2d 100644 --- a/gdbstub.c +++ b/gdbstub.c @@ -2373,7 +2373,7 @@ void gdb_set_stop_cpu(CPUState *env) } #ifndef CONFIG_USER_ONLY -static void gdb_vm_state_change(void *opaque, int running, int reason) +static void gdb_vm_state_change(void *opaque, int running, RunState state) { GDBState *s = gdbserver_state; CPUState *env = s->c_cpu; @@ -2384,8 +2384,8 @@ static void gdb_vm_state_change(void *opaque, int running, int reason) if (running || s->state == RS_INACTIVE || s->state == RS_SYSCALL) { return; } - switch (reason) { - case VMSTOP_DEBUG: + switch (state) { + case RSTATE_DEBUG: if (env->watchpoint_hit) { switch (env->watchpoint_hit->flags & BP_MEM_ACCESS) { case BP_MEM_READ: @@ -2408,25 +2408,25 @@ static void gdb_vm_state_change(void *opaque, int running, int reason) tb_flush(env); ret = GDB_SIGNAL_TRAP; break; - case VMSTOP_USER: + case RSTATE_PAUSED: ret = GDB_SIGNAL_INT; break; - case VMSTOP_SHUTDOWN: + case RSTATE_SHUTDOWN: ret = GDB_SIGNAL_QUIT; break; - case VMSTOP_DISKFULL: + case RSTATE_IO_ERROR: ret = GDB_SIGNAL_IO; break; - case VMSTOP_WATCHDOG: + case RSTATE_WATCHDOG: ret = GDB_SIGNAL_ALRM; break; - case VMSTOP_PANIC: + case RSTATE_PANICKED: ret = GDB_SIGNAL_ABRT; break; - case VMSTOP_SAVEVM: - case VMSTOP_LOADVM: + case RSTATE_SAVEVM: + case RSTATE_RESTORE: return; - case VMSTOP_MIGRATE: + case RSTATE_PRE_MIGRATE: ret = GDB_SIGNAL_XCPU; break; default: @@ -2463,7 +2463,7 @@ void gdb_do_syscall(gdb_syscall_complete_cb cb, const char *fmt, ...) gdb_current_syscall_cb = cb; s->state = RS_SYSCALL; #ifndef CONFIG_USER_ONLY - vm_stop(VMSTOP_DEBUG); + vm_stop(RSTATE_DEBUG); #endif s->state = RS_IDLE; va_start(va, fmt); @@ -2537,7 +2537,7 @@ static void gdb_read_byte(GDBState *s, int ch) if (vm_running) { /* when the CPU is running, we cannot do anything except stop it when receiving a char */ - vm_stop(VMSTOP_USER); + vm_stop(RSTATE_PAUSED); } else #endif { @@ -2799,7 +2799,7 @@ static void gdb_chr_event(void *opaque, int event) { switch (event) { case CHR_EVENT_OPENED: - vm_stop(VMSTOP_USER); + vm_stop(RSTATE_PAUSED); gdb_has_xml = 0; break; default: @@ -2840,7 +2840,7 @@ static int gdb_monitor_write(CharDriverState *chr, const uint8_t *buf, int len) static void gdb_sigterm_handler(int signal) { if (vm_running) { - vm_stop(VMSTOP_USER); + vm_stop(RSTATE_PAUSED); } } #endif diff --git a/hw/ide/ahci.c b/hw/ide/ahci.c index a8659cf8b9..b8132369ad 100644 --- a/hw/ide/ahci.c +++ b/hw/ide/ahci.c @@ -1103,7 +1103,7 @@ static void ahci_irq_set(void *opaque, int n, int level) { } -static void ahci_dma_restart_cb(void *opaque, int running, int reason) +static void ahci_dma_restart_cb(void *opaque, int running, RunState state) { } diff --git a/hw/ide/core.c b/hw/ide/core.c index 9297b9e657..4d5a076ad2 100644 --- a/hw/ide/core.c +++ b/hw/ide/core.c @@ -527,7 +527,7 @@ static int ide_handle_rw_error(IDEState *s, int error, int op) s->bus->dma->ops->set_unit(s->bus->dma, s->unit); s->bus->error_status = op; bdrv_mon_event(s->bs, BDRV_ACTION_STOP, is_read); - vm_stop(VMSTOP_DISKFULL); + vm_stop(RSTATE_IO_ERROR); } else { if (op & BM_STATUS_DMA_RETRY) { dma_buf_commit(s, 0); @@ -1910,7 +1910,7 @@ static int ide_nop_int(IDEDMA *dma, int x) return 0; } -static void ide_nop_restart(void *opaque, int x, int y) +static void ide_nop_restart(void *opaque, int x, RunState y) { } diff --git a/hw/ide/internal.h b/hw/ide/internal.h index 233915ce0d..9046e96013 100644 --- a/hw/ide/internal.h +++ b/hw/ide/internal.h @@ -9,6 +9,7 @@ #include #include "iorange.h" #include "dma.h" +#include "sysemu.h" /* debug IDE devices */ //#define DEBUG_IDE @@ -387,7 +388,7 @@ typedef void EndTransferFunc(IDEState *); typedef void DMAStartFunc(IDEDMA *, IDEState *, BlockDriverCompletionFunc *); typedef int DMAFunc(IDEDMA *); typedef int DMAIntFunc(IDEDMA *, int); -typedef void DMARestartFunc(void *, int, int); +typedef void DMARestartFunc(void *, int, RunState); struct unreported_events { bool eject_request; diff --git a/hw/ide/pci.c b/hw/ide/pci.c index 9fded02954..f133c422b6 100644 --- a/hw/ide/pci.c +++ b/hw/ide/pci.c @@ -222,7 +222,7 @@ static void bmdma_restart_bh(void *opaque) } } -static void bmdma_restart_cb(void *opaque, int running, int reason) +static void bmdma_restart_cb(void *opaque, int running, RunState state) { IDEDMA *dma = opaque; BMDMAState *bm = DO_UPCAST(BMDMAState, dma, dma); diff --git a/hw/kvmclock.c b/hw/kvmclock.c index b73aec409c..88961be42b 100644 --- a/hw/kvmclock.c +++ b/hw/kvmclock.c @@ -59,7 +59,8 @@ static int kvmclock_post_load(void *opaque, int version_id) return kvm_vm_ioctl(kvm_state, KVM_SET_CLOCK, &data); } -static void kvmclock_vm_state_change(void *opaque, int running, int reason) +static void kvmclock_vm_state_change(void *opaque, int running, + RunState state) { KVMClockState *s = opaque; diff --git a/hw/qxl.c b/hw/qxl.c index a282d2396b..6db2f1a466 100644 --- a/hw/qxl.c +++ b/hw/qxl.c @@ -1453,10 +1453,11 @@ static void qxl_hw_text_update(void *opaque, console_ch_t *chardata) } } -static void qxl_vm_change_state_handler(void *opaque, int running, int reason) +static void qxl_vm_change_state_handler(void *opaque, int running, + RunState state) { PCIQXLDevice *qxl = opaque; - qemu_spice_vm_change_state_handler(&qxl->ssd, running, reason); + qemu_spice_vm_change_state_handler(&qxl->ssd, running, state); if (running) { /* diff --git a/hw/scsi-disk.c b/hw/scsi-disk.c index 4a60820b18..96c554fe29 100644 --- a/hw/scsi-disk.c +++ b/hw/scsi-disk.c @@ -217,7 +217,7 @@ static int scsi_handle_rw_error(SCSIDiskReq *r, int error, int type) r->status |= SCSI_REQ_STATUS_RETRY | type; bdrv_mon_event(s->bs, BDRV_ACTION_STOP, is_read); - vm_stop(VMSTOP_DISKFULL); + vm_stop(RSTATE_IO_ERROR); } else { switch (error) { case ENOMEM: @@ -338,7 +338,7 @@ static void scsi_dma_restart_bh(void *opaque) } } -static void scsi_dma_restart_cb(void *opaque, int running, int reason) +static void scsi_dma_restart_cb(void *opaque, int running, RunState state) { SCSIDiskState *s = opaque; diff --git a/hw/virtio-blk.c b/hw/virtio-blk.c index c2ee0001eb..daa8e42be7 100644 --- a/hw/virtio-blk.c +++ b/hw/virtio-blk.c @@ -77,7 +77,7 @@ static int virtio_blk_handle_rw_error(VirtIOBlockReq *req, int error, req->next = s->rq; s->rq = req; bdrv_mon_event(s->bs, BDRV_ACTION_STOP, is_read); - vm_stop(VMSTOP_DISKFULL); + vm_stop(RSTATE_IO_ERROR); } else { virtio_blk_req_complete(req, VIRTIO_BLK_S_IOERR); bdrv_acct_done(s->bs, &req->acct); @@ -439,7 +439,8 @@ static void virtio_blk_dma_restart_bh(void *opaque) virtio_submit_multiwrite(s->bs, &mrb); } -static void virtio_blk_dma_restart_cb(void *opaque, int running, int reason) +static void virtio_blk_dma_restart_cb(void *opaque, int running, + RunState state) { VirtIOBlock *s = opaque; diff --git a/hw/virtio.c b/hw/virtio.c index 13aa0faf27..74ab79e6b5 100644 --- a/hw/virtio.c +++ b/hw/virtio.c @@ -837,7 +837,7 @@ void virtio_cleanup(VirtIODevice *vdev) g_free(vdev); } -static void virtio_vmstate_change(void *opaque, int running, int reason) +static void virtio_vmstate_change(void *opaque, int running, RunState state) { VirtIODevice *vdev = opaque; bool backend_run = running && (vdev->status & VIRTIO_CONFIG_S_DRIVER_OK); diff --git a/hw/watchdog.c b/hw/watchdog.c index 1c900a1189..71c6c7df63 100644 --- a/hw/watchdog.c +++ b/hw/watchdog.c @@ -132,7 +132,7 @@ void watchdog_perform_action(void) case WDT_PAUSE: /* same as 'stop' command in monitor */ watchdog_mon_event("pause"); - vm_stop(VMSTOP_WATCHDOG); + vm_stop(RSTATE_WATCHDOG); break; case WDT_DEBUG: diff --git a/kvm-all.c b/kvm-all.c index fbb9ff3bef..228655b388 100644 --- a/kvm-all.c +++ b/kvm-all.c @@ -1014,7 +1014,7 @@ int kvm_cpu_exec(CPUState *env) if (ret < 0) { cpu_dump_state(env, stderr, fprintf, CPU_DUMP_CODE); - vm_stop(VMSTOP_PANIC); + vm_stop(RSTATE_PANICKED); } env->exit_request = 0; diff --git a/migration.c b/migration.c index f5959b4391..29f1a76df1 100644 --- a/migration.c +++ b/migration.c @@ -374,7 +374,7 @@ void migrate_fd_put_ready(void *opaque) int old_vm_running = vm_running; DPRINTF("done iterating\n"); - vm_stop(VMSTOP_MIGRATE); + vm_stop(RSTATE_PRE_MIGRATE); if ((qemu_savevm_state_complete(s->mon, s->file)) < 0) { if (old_vm_running) { diff --git a/monitor.c b/monitor.c index 03ae997ffe..b98b8bd2b2 100644 --- a/monitor.c +++ b/monitor.c @@ -1293,7 +1293,7 @@ static void do_singlestep(Monitor *mon, const QDict *qdict) */ static int do_stop(Monitor *mon, const QDict *qdict, QObject **ret_data) { - vm_stop(VMSTOP_USER); + vm_stop(RSTATE_PAUSED); return 0; } @@ -2828,7 +2828,7 @@ static void do_loadvm(Monitor *mon, const QDict *qdict) int saved_vm_running = vm_running; const char *name = qdict_get_str(qdict, "name"); - vm_stop(VMSTOP_LOADVM); + vm_stop(RSTATE_RESTORE); if (load_vmstate(name) == 0 && saved_vm_running) { vm_start(); diff --git a/qemu-timer.c b/qemu-timer.c index 46dd483fdd..b5827862d9 100644 --- a/qemu-timer.c +++ b/qemu-timer.c @@ -1116,7 +1116,8 @@ static void win32_rearm_timer(struct qemu_alarm_timer *t) #endif /* _WIN32 */ -static void alarm_timer_on_change_state_rearm(void *opaque, int running, int reason) +static void alarm_timer_on_change_state_rearm(void *opaque, int running, + RunState state) { if (running) qemu_rearm_alarm_timer((struct qemu_alarm_timer *) opaque); diff --git a/savevm.c b/savevm.c index 1feaa70ccc..f1f7735d11 100644 --- a/savevm.c +++ b/savevm.c @@ -1603,7 +1603,7 @@ static int qemu_savevm_state(Monitor *mon, QEMUFile *f) int ret; saved_vm_running = vm_running; - vm_stop(VMSTOP_SAVEVM); + vm_stop(RSTATE_SAVEVM); if (qemu_savevm_state_blocked(mon)) { ret = -EINVAL; @@ -1932,7 +1932,7 @@ void do_savevm(Monitor *mon, const QDict *qdict) } saved_vm_running = vm_running; - vm_stop(VMSTOP_SAVEVM); + vm_stop(RSTATE_SAVEVM); memset(sn, 0, sizeof(*sn)); diff --git a/sysemu.h b/sysemu.h index eb66af5e55..be3448b155 100644 --- a/sysemu.h +++ b/sysemu.h @@ -9,6 +9,21 @@ #include "notify.h" /* vl.c */ + +typedef enum { + RSTATE_NO_STATE, + RSTATE_DEBUG, /* qemu is running under gdb */ + RSTATE_PANICKED, /* paused due to an internal error */ + RSTATE_IO_ERROR, /* paused due to an I/O error */ + RSTATE_PAUSED, /* paused by the user (ie. the 'stop' command) */ + RSTATE_PRE_MIGRATE, /* paused preparing to finish migrate */ + RSTATE_RESTORE, /* paused restoring the VM state */ + RSTATE_RUNNING, /* qemu is running */ + RSTATE_SAVEVM, /* paused saving VM state */ + RSTATE_SHUTDOWN, /* guest shut down and -no-shutdown is in use */ + RSTATE_WATCHDOG /* watchdog fired and qemu is configured to pause */ +} RunState; + extern const char *bios_name; extern int vm_running; @@ -18,34 +33,24 @@ int qemu_uuid_parse(const char *str, uint8_t *uuid); #define UUID_FMT "%02hhx%02hhx%02hhx%02hhx-%02hhx%02hhx-%02hhx%02hhx-%02hhx%02hhx-%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx" typedef struct vm_change_state_entry VMChangeStateEntry; -typedef void VMChangeStateHandler(void *opaque, int running, int reason); +typedef void VMChangeStateHandler(void *opaque, int running, RunState state); VMChangeStateEntry *qemu_add_vm_change_state_handler(VMChangeStateHandler *cb, void *opaque); void qemu_del_vm_change_state_handler(VMChangeStateEntry *e); -void vm_state_notify(int running, int reason); - -#define VMSTOP_USER 0 -#define VMSTOP_DEBUG 1 -#define VMSTOP_SHUTDOWN 2 -#define VMSTOP_DISKFULL 3 -#define VMSTOP_WATCHDOG 4 -#define VMSTOP_PANIC 5 -#define VMSTOP_SAVEVM 6 -#define VMSTOP_LOADVM 7 -#define VMSTOP_MIGRATE 8 +void vm_state_notify(int running, RunState state); #define VMRESET_SILENT false #define VMRESET_REPORT true void vm_start(void); -void vm_stop(int reason); +void vm_stop(RunState state); void qemu_system_reset_request(void); void qemu_system_shutdown_request(void); void qemu_system_powerdown_request(void); void qemu_system_debug_request(void); -void qemu_system_vmstop_request(int reason); +void qemu_system_vmstop_request(RunState reason); int qemu_shutdown_requested_get(void); int qemu_reset_requested_get(void); int qemu_shutdown_requested(void); diff --git a/target-i386/kvm.c b/target-i386/kvm.c index 22b1dd0665..ead34ea38d 100644 --- a/target-i386/kvm.c +++ b/target-i386/kvm.c @@ -334,7 +334,7 @@ static int kvm_inject_mce_oldstyle(CPUState *env) return 0; } -static void cpu_update_state(void *opaque, int running, int reason) +static void cpu_update_state(void *opaque, int running, RunState state) { CPUState *env = opaque; diff --git a/ui/spice-display.c b/ui/spice-display.c index e38536114b..3a92a126e5 100644 --- a/ui/spice-display.c +++ b/ui/spice-display.c @@ -255,7 +255,8 @@ void qemu_spice_destroy_host_primary(SimpleSpiceDisplay *ssd) qemu_spice_destroy_primary_surface(ssd, 0, QXL_SYNC); } -void qemu_spice_vm_change_state_handler(void *opaque, int running, int reason) +void qemu_spice_vm_change_state_handler(void *opaque, int running, + RunState state) { SimpleSpiceDisplay *ssd = opaque; diff --git a/ui/spice-display.h b/ui/spice-display.h index 1388641370..5e52df99be 100644 --- a/ui/spice-display.h +++ b/ui/spice-display.h @@ -22,6 +22,7 @@ #include "qemu-thread.h" #include "console.h" #include "pflib.h" +#include "sysemu.h" #define NUM_MEMSLOTS 8 #define MEMSLOT_GENERATION_BITS 8 @@ -88,7 +89,8 @@ void qemu_spice_destroy_update(SimpleSpiceDisplay *sdpy, SimpleSpiceUpdate *upda void qemu_spice_create_host_memslot(SimpleSpiceDisplay *ssd); void qemu_spice_create_host_primary(SimpleSpiceDisplay *ssd); void qemu_spice_destroy_host_primary(SimpleSpiceDisplay *ssd); -void qemu_spice_vm_change_state_handler(void *opaque, int running, int reason); +void qemu_spice_vm_change_state_handler(void *opaque, int running, + RunState state); void qemu_spice_display_init_common(SimpleSpiceDisplay *ssd, DisplayState *ds); void qemu_spice_display_update(SimpleSpiceDisplay *ssd, diff --git a/vl.c b/vl.c index b773d2f126..304a499551 100644 --- a/vl.c +++ b/vl.c @@ -1145,14 +1145,14 @@ void qemu_del_vm_change_state_handler(VMChangeStateEntry *e) g_free (e); } -void vm_state_notify(int running, int reason) +void vm_state_notify(int running, RunState state) { VMChangeStateEntry *e; - trace_vm_state_notify(running, reason); + trace_vm_state_notify(running, state); for (e = vm_change_state_head.lh_first; e; e = e->entries.le_next) { - e->cb(e->opaque, running, reason); + e->cb(e->opaque, running, state); } } @@ -1161,7 +1161,7 @@ void vm_start(void) if (!vm_running) { cpu_enable_ticks(); vm_running = 1; - vm_state_notify(1, 0); + vm_state_notify(1, RSTATE_RUNNING); resume_all_vcpus(); monitor_protocol_event(QEVENT_RESUME, NULL); } @@ -1182,7 +1182,7 @@ static int shutdown_requested, shutdown_signal = -1; static pid_t shutdown_pid; static int powerdown_requested; static int debug_requested; -static int vmstop_requested; +static RunState vmstop_requested = RSTATE_NO_STATE; int qemu_shutdown_requested_get(void) { @@ -1238,11 +1238,11 @@ static int qemu_debug_requested(void) return r; } -static int qemu_vmstop_requested(void) +static RunState qemu_vmstop_requested(void) { - int r = vmstop_requested; - vmstop_requested = 0; - return r; + RunState s = vmstop_requested; + vmstop_requested = RSTATE_NO_STATE; + return s; } void qemu_register_reset(QEMUResetHandler *func, void *opaque) @@ -1317,9 +1317,9 @@ void qemu_system_debug_request(void) qemu_notify_event(); } -void qemu_system_vmstop_request(int reason) +void qemu_system_vmstop_request(RunState state) { - vmstop_requested = reason; + vmstop_requested = state; qemu_notify_event(); } @@ -1469,13 +1469,13 @@ static void main_loop(void) #endif if (qemu_debug_requested()) { - vm_stop(VMSTOP_DEBUG); + vm_stop(RSTATE_DEBUG); } if (qemu_shutdown_requested()) { qemu_kill_report(); monitor_protocol_event(QEVENT_SHUTDOWN, NULL); if (no_shutdown) { - vm_stop(VMSTOP_SHUTDOWN); + vm_stop(RSTATE_SHUTDOWN); } else break; } diff --git a/xen-all.c b/xen-all.c index 1bc2c3c8de..b119817f30 100644 --- a/xen-all.c +++ b/xen-all.c @@ -846,7 +846,8 @@ static void xen_main_loop_prepare(XenIOState *state) /* Initialise Xen */ -static void xen_change_state_handler(void *opaque, int running, int reason) +static void xen_change_state_handler(void *opaque, int running, + RunState state) { if (running) { /* record state running */ @@ -854,11 +855,12 @@ static void xen_change_state_handler(void *opaque, int running, int reason) } } -static void xen_hvm_change_state_handler(void *opaque, int running, int reason) +static void xen_hvm_change_state_handler(void *opaque, int running, + RunState rstate) { - XenIOState *state = opaque; + XenIOState *xstate = opaque; if (running) { - xen_main_loop_prepare(state); + xen_main_loop_prepare(xstate); } } -- cgit v1.2.1 From f5bbfba1ebe8c877ebfe846fc1e73e90da423884 Mon Sep 17 00:00:00 2001 From: Luiz Capitulino Date: Fri, 29 Jul 2011 15:04:45 -0300 Subject: RunState: Add additional states Currently, only vm_start() and vm_stop() change the VM state. That's, the state is only changed when starting or stopping the VM. This commit adds the runstate_set() function, which makes it possible to also do state transitions when the VM is stopped or running. Additional states are also added and the current state is stored. Signed-off-by: Luiz Capitulino --- cpus.c | 1 + migration.c | 8 +++++++- sysemu.h | 8 +++++++- vl.c | 20 ++++++++++++++++++++ 4 files changed, 35 insertions(+), 2 deletions(-) diff --git a/cpus.c b/cpus.c index 76a79ac7d4..3444bc06e7 100644 --- a/cpus.c +++ b/cpus.c @@ -124,6 +124,7 @@ static void do_vm_stop(RunState state) cpu_disable_ticks(); vm_running = 0; pause_all_vcpus(); + runstate_set(state); vm_state_notify(0, state); qemu_aio_flush(); bdrv_flush_all(); diff --git a/migration.c b/migration.c index 29f1a76df1..f2499cfdd4 100644 --- a/migration.c +++ b/migration.c @@ -72,8 +72,11 @@ void process_incoming_migration(QEMUFile *f) incoming_expected = false; - if (autostart) + if (autostart) { vm_start(); + } else { + runstate_set(RSTATE_PRE_LAUNCH); + } } int do_migrate(Monitor *mon, const QDict *qdict, QObject **ret_data) @@ -390,6 +393,9 @@ void migrate_fd_put_ready(void *opaque) } state = MIG_STATE_ERROR; } + if (state == MIG_STATE_COMPLETED) { + runstate_set(RSTATE_POST_MIGRATE); + } s->state = state; notifier_list_notify(&migration_state_notifiers, NULL); } diff --git a/sysemu.h b/sysemu.h index be3448b155..19088aa2dd 100644 --- a/sysemu.h +++ b/sysemu.h @@ -13,15 +13,19 @@ typedef enum { RSTATE_NO_STATE, RSTATE_DEBUG, /* qemu is running under gdb */ + RSTATE_IN_MIGRATE, /* paused waiting for an incoming migration */ RSTATE_PANICKED, /* paused due to an internal error */ RSTATE_IO_ERROR, /* paused due to an I/O error */ RSTATE_PAUSED, /* paused by the user (ie. the 'stop' command) */ + RSTATE_POST_MIGRATE, /* paused following a successful migration */ + RSTATE_PRE_LAUNCH, /* qemu was started with -S and haven't started */ RSTATE_PRE_MIGRATE, /* paused preparing to finish migrate */ RSTATE_RESTORE, /* paused restoring the VM state */ RSTATE_RUNNING, /* qemu is running */ RSTATE_SAVEVM, /* paused saving VM state */ RSTATE_SHUTDOWN, /* guest shut down and -no-shutdown is in use */ - RSTATE_WATCHDOG /* watchdog fired and qemu is configured to pause */ + RSTATE_WATCHDOG, /* watchdog fired and qemu is configured to pause */ + RSTATE_MAX } RunState; extern const char *bios_name; @@ -32,6 +36,8 @@ extern uint8_t qemu_uuid[]; int qemu_uuid_parse(const char *str, uint8_t *uuid); #define UUID_FMT "%02hhx%02hhx%02hhx%02hhx-%02hhx%02hhx-%02hhx%02hhx-%02hhx%02hhx-%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx" +bool runstate_check(RunState state); +void runstate_set(RunState new_state); typedef struct vm_change_state_entry VMChangeStateEntry; typedef void VMChangeStateHandler(void *opaque, int running, RunState state); diff --git a/vl.c b/vl.c index 304a499551..059e727cb2 100644 --- a/vl.c +++ b/vl.c @@ -322,6 +322,22 @@ static int default_driver_check(QemuOpts *opts, void *opaque) return 0; } +/***********************************************************/ +/* QEMU state */ + +static RunState current_run_state = RSTATE_NO_STATE; + +bool runstate_check(RunState state) +{ + return current_run_state == state; +} + +void runstate_set(RunState new_state) +{ + assert(new_state < RSTATE_MAX); + current_run_state = new_state; +} + /***********************************************************/ /* real time host monotonic timer */ @@ -1161,6 +1177,7 @@ void vm_start(void) if (!vm_running) { cpu_enable_ticks(); vm_running = 1; + runstate_set(RSTATE_RUNNING); vm_state_notify(1, RSTATE_RUNNING); resume_all_vcpus(); monitor_protocol_event(QEVENT_RESUME, NULL); @@ -3438,6 +3455,7 @@ int main(int argc, char **argv, char **envp) } if (incoming) { + runstate_set(RSTATE_IN_MIGRATE); int ret = qemu_start_incoming_migration(incoming); if (ret < 0) { fprintf(stderr, "Migration failed. Exit code %s(%d), exiting.\n", @@ -3446,6 +3464,8 @@ int main(int argc, char **argv, char **envp) } } else if (autostart) { vm_start(); + } else { + runstate_set(RSTATE_PRE_LAUNCH); } os_setup_post(); -- cgit v1.2.1 From 5db9d4d18612bd5852bf663a40cf7bcf1ddc1b03 Mon Sep 17 00:00:00 2001 From: Luiz Capitulino Date: Mon, 5 Sep 2011 16:36:31 -0300 Subject: runstate_set(): Check for valid transitions MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This commit could have been folded with the previous one, however doing it separately will allow for easy bisect and revert if needed. Checking and testing all valid transitions wasn't trivial, chances are this will need broader testing to become more stable. This is a transition table as suggested by Lluís Vilanova. Signed-off-by: Luiz Capitulino --- sysemu.h | 1 + vl.c | 74 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++- 2 files changed, 74 insertions(+), 1 deletion(-) diff --git a/sysemu.h b/sysemu.h index 19088aa2dd..a01ddac564 100644 --- a/sysemu.h +++ b/sysemu.h @@ -36,6 +36,7 @@ extern uint8_t qemu_uuid[]; int qemu_uuid_parse(const char *str, uint8_t *uuid); #define UUID_FMT "%02hhx%02hhx%02hhx%02hhx-%02hhx%02hhx-%02hhx%02hhx-%02hhx%02hhx-%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx" +void runstate_init(void); bool runstate_check(RunState state); void runstate_set(RunState new_state); typedef struct vm_change_state_entry VMChangeStateEntry; diff --git a/vl.c b/vl.c index 059e727cb2..cc68fb327d 100644 --- a/vl.c +++ b/vl.c @@ -327,14 +327,84 @@ static int default_driver_check(QemuOpts *opts, void *opaque) static RunState current_run_state = RSTATE_NO_STATE; +typedef struct { + RunState from; + RunState to; +} RunStateTransition; + +static const RunStateTransition runstate_transitions_def[] = { + /* from -> to */ + { RSTATE_NO_STATE, RSTATE_RUNNING }, + { RSTATE_NO_STATE, RSTATE_IN_MIGRATE }, + { RSTATE_NO_STATE, RSTATE_PRE_LAUNCH }, + + { RSTATE_DEBUG, RSTATE_RUNNING }, + + { RSTATE_IN_MIGRATE, RSTATE_RUNNING }, + { RSTATE_IN_MIGRATE, RSTATE_PRE_LAUNCH }, + + { RSTATE_PANICKED, RSTATE_PAUSED }, + + { RSTATE_IO_ERROR, RSTATE_RUNNING }, + + { RSTATE_PAUSED, RSTATE_RUNNING }, + + { RSTATE_POST_MIGRATE, RSTATE_RUNNING }, + + { RSTATE_PRE_LAUNCH, RSTATE_RUNNING }, + { RSTATE_PRE_LAUNCH, RSTATE_POST_MIGRATE }, + + { RSTATE_PRE_MIGRATE, RSTATE_RUNNING }, + { RSTATE_PRE_MIGRATE, RSTATE_POST_MIGRATE }, + + { RSTATE_RESTORE, RSTATE_RUNNING }, + + { RSTATE_RUNNING, RSTATE_DEBUG }, + { RSTATE_RUNNING, RSTATE_PANICKED }, + { RSTATE_RUNNING, RSTATE_IO_ERROR }, + { RSTATE_RUNNING, RSTATE_PAUSED }, + { RSTATE_RUNNING, RSTATE_PRE_MIGRATE }, + { RSTATE_RUNNING, RSTATE_RESTORE }, + { RSTATE_RUNNING, RSTATE_SAVEVM }, + { RSTATE_RUNNING, RSTATE_SHUTDOWN }, + { RSTATE_RUNNING, RSTATE_WATCHDOG }, + + { RSTATE_SAVEVM, RSTATE_RUNNING }, + + { RSTATE_SHUTDOWN, RSTATE_PAUSED }, + + { RSTATE_WATCHDOG, RSTATE_RUNNING }, + + { RSTATE_MAX, RSTATE_MAX }, +}; + +static bool runstate_valid_transitions[RSTATE_MAX][RSTATE_MAX]; + bool runstate_check(RunState state) { return current_run_state == state; } +void runstate_init(void) +{ + const RunStateTransition *p; + + memset(&runstate_valid_transitions, 0, sizeof(runstate_valid_transitions)); + + for (p = &runstate_transitions_def[0]; p->from != RSTATE_MAX; p++) { + runstate_valid_transitions[p->from][p->to] = true; + } +} + +/* This function will abort() on invalid state transitions */ void runstate_set(RunState new_state) { - assert(new_state < RSTATE_MAX); + if (new_state >= RSTATE_MAX || + !runstate_valid_transitions[current_run_state][new_state]) { + fprintf(stderr, "invalid runstate transition\n"); + abort(); + } + current_run_state = new_state; } @@ -2219,6 +2289,8 @@ int main(int argc, char **argv, char **envp) g_mem_set_vtable(&mem_trace); g_thread_init(NULL); + runstate_init(); + init_clocks(); qemu_cache_utils_init(envp); -- cgit v1.2.1 From 1bcef683bf840a928d633755031ac572d5fdb851 Mon Sep 17 00:00:00 2001 From: Luiz Capitulino Date: Fri, 29 Jul 2011 15:15:00 -0300 Subject: Drop the incoming_expected global variable Test against RSTATE_IN_MIGRATE instead. Please, note that the RSTATE_IN_MIGRATE state is only set when all the initial VM setup is done, while 'incoming_expected' was set right in the beginning when parsing command-line options. Shouldn't be a problem as far as I could check. Signed-off-by: Luiz Capitulino --- migration.c | 2 -- monitor.c | 2 +- vl.c | 2 -- 3 files changed, 1 insertion(+), 5 deletions(-) diff --git a/migration.c b/migration.c index f2499cfdd4..a63e2a21af 100644 --- a/migration.c +++ b/migration.c @@ -70,8 +70,6 @@ void process_incoming_migration(QEMUFile *f) qemu_announce_self(); DPRINTF("successfully loaded vm state\n"); - incoming_expected = false; - if (autostart) { vm_start(); } else { diff --git a/monitor.c b/monitor.c index b98b8bd2b2..68956a5671 100644 --- a/monitor.c +++ b/monitor.c @@ -1311,7 +1311,7 @@ static int do_cont(Monitor *mon, const QDict *qdict, QObject **ret_data) { struct bdrv_iterate_context context = { mon, 0 }; - if (incoming_expected) { + if (runstate_check(RSTATE_IN_MIGRATE)) { qerror_report(QERR_MIGRATION_EXPECTED); return -1; } diff --git a/vl.c b/vl.c index cc68fb327d..2fb09f5012 100644 --- a/vl.c +++ b/vl.c @@ -187,7 +187,6 @@ int nb_nics; NICInfo nd_table[MAX_NICS]; int vm_running; int autostart; -int incoming_expected; /* Started with -incoming and waiting for incoming */ static int rtc_utc = 1; static int rtc_date_offset = -1; /* -1 means no change */ QEMUClock *rtc_clock; @@ -3041,7 +3040,6 @@ int main(int argc, char **argv, char **envp) break; case QEMU_OPTION_incoming: incoming = optarg; - incoming_expected = true; break; case QEMU_OPTION_nodefaults: default_serial = 0; -- cgit v1.2.1 From 1354869c380cf4560fa3f0520e914cb5ee380ac8 Mon Sep 17 00:00:00 2001 From: Luiz Capitulino Date: Fri, 29 Jul 2011 15:36:43 -0300 Subject: Drop the vm_running global variable Use runstate_is_running() instead, which is introduced by this commit. Signed-off-by: Luiz Capitulino --- cpus.c | 9 ++++----- gdbstub.c | 4 ++-- hw/etraxfs_dma.c | 2 +- hw/kvmclock.c | 2 +- hw/virtio.c | 2 +- migration.c | 2 +- monitor.c | 4 ++-- qemu-timer.c | 6 +++--- savevm.c | 4 ++-- sysemu.h | 2 +- target-i386/kvm.c | 2 +- ui/sdl.c | 6 +++--- vl.c | 9 ++++++--- xen-all.c | 2 +- 14 files changed, 29 insertions(+), 27 deletions(-) diff --git a/cpus.c b/cpus.c index 3444bc06e7..883c27ac9a 100644 --- a/cpus.c +++ b/cpus.c @@ -115,14 +115,13 @@ void cpu_synchronize_all_post_init(void) int cpu_is_stopped(CPUState *env) { - return !vm_running || env->stopped; + return !runstate_is_running() || env->stopped; } static void do_vm_stop(RunState state) { - if (vm_running) { + if (runstate_is_running()) { cpu_disable_ticks(); - vm_running = 0; pause_all_vcpus(); runstate_set(state); vm_state_notify(0, state); @@ -137,7 +136,7 @@ static int cpu_can_run(CPUState *env) if (env->stop) { return 0; } - if (env->stopped || !vm_running) { + if (env->stopped || !runstate_is_running()) { return 0; } return 1; @@ -148,7 +147,7 @@ static bool cpu_thread_is_idle(CPUState *env) if (env->stop || env->queued_work_first) { return false; } - if (env->stopped || !vm_running) { + if (env->stopped || !runstate_is_running()) { return true; } if (!env->halted || qemu_cpu_has_work(env) || diff --git a/gdbstub.c b/gdbstub.c index 75b52e2c2d..12dd100af4 100644 --- a/gdbstub.c +++ b/gdbstub.c @@ -2534,7 +2534,7 @@ static void gdb_read_byte(GDBState *s, int ch) if (ch != '$') return; } - if (vm_running) { + if (runstate_is_running()) { /* when the CPU is running, we cannot do anything except stop it when receiving a char */ vm_stop(RSTATE_PAUSED); @@ -2839,7 +2839,7 @@ static int gdb_monitor_write(CharDriverState *chr, const uint8_t *buf, int len) #ifndef _WIN32 static void gdb_sigterm_handler(int signal) { - if (vm_running) { + if (runstate_is_running()) { vm_stop(RSTATE_PAUSED); } } diff --git a/hw/etraxfs_dma.c b/hw/etraxfs_dma.c index e8ad9e6a0b..d3082acc8f 100644 --- a/hw/etraxfs_dma.c +++ b/hw/etraxfs_dma.c @@ -732,7 +732,7 @@ static void DMA_run(void *opaque) struct fs_dma_ctrl *etraxfs_dmac = opaque; int p = 1; - if (vm_running) + if (runstate_is_running()) p = etraxfs_dmac_run(etraxfs_dmac); if (p) diff --git a/hw/kvmclock.c b/hw/kvmclock.c index 88961be42b..5388bc489d 100644 --- a/hw/kvmclock.c +++ b/hw/kvmclock.c @@ -46,7 +46,7 @@ static void kvmclock_pre_save(void *opaque) * it on next vmsave (which would return a different value). Will be reset * when the VM is continued. */ - s->clock_valid = !vm_running; + s->clock_valid = !runstate_is_running(); } static int kvmclock_post_load(void *opaque, int version_id) diff --git a/hw/virtio.c b/hw/virtio.c index 74ab79e6b5..c577bbe483 100644 --- a/hw/virtio.c +++ b/hw/virtio.c @@ -870,7 +870,7 @@ VirtIODevice *virtio_common_init(const char *name, uint16_t device_id, vdev->queue_sel = 0; vdev->config_vector = VIRTIO_NO_VECTOR; vdev->vq = g_malloc0(sizeof(VirtQueue) * VIRTIO_PCI_QUEUE_MAX); - vdev->vm_running = vm_running; + vdev->vm_running = runstate_is_running(); for(i = 0; i < VIRTIO_PCI_QUEUE_MAX; i++) { vdev->vq[i].vector = VIRTIO_NO_VECTOR; vdev->vq[i].vdev = vdev; diff --git a/migration.c b/migration.c index a63e2a21af..7dd8f4eee9 100644 --- a/migration.c +++ b/migration.c @@ -372,7 +372,7 @@ void migrate_fd_put_ready(void *opaque) DPRINTF("iterate\n"); if (qemu_savevm_state_iterate(s->mon, s->file) == 1) { int state; - int old_vm_running = vm_running; + int old_vm_running = runstate_is_running(); DPRINTF("done iterating\n"); vm_stop(RSTATE_PRE_MIGRATE); diff --git a/monitor.c b/monitor.c index 68956a5671..442b4cf01d 100644 --- a/monitor.c +++ b/monitor.c @@ -2632,7 +2632,7 @@ static void do_info_status_print(Monitor *mon, const QObject *data) static void do_info_status(Monitor *mon, QObject **ret_data) { *ret_data = qobject_from_jsonf("{ 'running': %i, 'singlestep': %i }", - vm_running, singlestep); + runstate_is_running(), singlestep); } static qemu_acl *find_acl(Monitor *mon, const char *name) @@ -2825,7 +2825,7 @@ static int do_closefd(Monitor *mon, const QDict *qdict, QObject **ret_data) static void do_loadvm(Monitor *mon, const QDict *qdict) { - int saved_vm_running = vm_running; + int saved_vm_running = runstate_is_running(); const char *name = qdict_get_str(qdict, "name"); vm_stop(RSTATE_RESTORE); diff --git a/qemu-timer.c b/qemu-timer.c index b5827862d9..ad1fc8b871 100644 --- a/qemu-timer.c +++ b/qemu-timer.c @@ -230,7 +230,7 @@ static void icount_adjust(void) int64_t delta; static int64_t last_delta; /* If the VM is not running, then do nothing. */ - if (!vm_running) + if (!runstate_is_running()) return; cur_time = cpu_get_clock(); @@ -388,7 +388,7 @@ static void icount_warp_rt(void *opaque) return; } - if (vm_running) { + if (runstate_is_running()) { int64_t clock = qemu_get_clock_ns(rt_clock); int64_t warp_delta = clock - vm_clock_warp_start; if (use_icount == 1) { @@ -710,7 +710,7 @@ void qemu_run_all_timers(void) } /* vm time timers */ - if (vm_running) { + if (runstate_is_running()) { qemu_run_timers(vm_clock); } diff --git a/savevm.c b/savevm.c index f1f7735d11..46f2447dc0 100644 --- a/savevm.c +++ b/savevm.c @@ -1602,7 +1602,7 @@ static int qemu_savevm_state(Monitor *mon, QEMUFile *f) int saved_vm_running; int ret; - saved_vm_running = vm_running; + saved_vm_running = runstate_is_running(); vm_stop(RSTATE_SAVEVM); if (qemu_savevm_state_blocked(mon)) { @@ -1931,7 +1931,7 @@ void do_savevm(Monitor *mon, const QDict *qdict) return; } - saved_vm_running = vm_running; + saved_vm_running = runstate_is_running(); vm_stop(RSTATE_SAVEVM); memset(sn, 0, sizeof(*sn)); diff --git a/sysemu.h b/sysemu.h index a01ddac564..9a2c531465 100644 --- a/sysemu.h +++ b/sysemu.h @@ -30,7 +30,6 @@ typedef enum { extern const char *bios_name; -extern int vm_running; extern const char *qemu_name; extern uint8_t qemu_uuid[]; int qemu_uuid_parse(const char *str, uint8_t *uuid); @@ -39,6 +38,7 @@ int qemu_uuid_parse(const char *str, uint8_t *uuid); void runstate_init(void); bool runstate_check(RunState state); void runstate_set(RunState new_state); +int runstate_is_running(void); typedef struct vm_change_state_entry VMChangeStateEntry; typedef void VMChangeStateHandler(void *opaque, int running, RunState state); diff --git a/target-i386/kvm.c b/target-i386/kvm.c index ead34ea38d..b6eef047bf 100644 --- a/target-i386/kvm.c +++ b/target-i386/kvm.c @@ -1130,7 +1130,7 @@ static int kvm_get_msrs(CPUState *env) if (!env->tsc_valid) { msrs[n++].index = MSR_IA32_TSC; - env->tsc_valid = !vm_running; + env->tsc_valid = !runstate_is_running(); } #ifdef TARGET_X86_64 diff --git a/ui/sdl.c b/ui/sdl.c index c7aaedf32d..8cafc44e71 100644 --- a/ui/sdl.c +++ b/ui/sdl.c @@ -409,7 +409,7 @@ static void sdl_update_caption(void) char icon_title[1024]; const char *status = ""; - if (!vm_running) + if (!runstate_is_running()) status = " [Stopped]"; else if (gui_grab) { if (alt_grab) @@ -853,8 +853,8 @@ static void sdl_refresh(DisplayState *ds) { SDL_Event ev1, *ev = &ev1; - if (last_vm_running != vm_running) { - last_vm_running = vm_running; + if (last_vm_running != runstate_is_running()) { + last_vm_running = runstate_is_running(); sdl_update_caption(); } diff --git a/vl.c b/vl.c index 2fb09f5012..9128d48fea 100644 --- a/vl.c +++ b/vl.c @@ -185,7 +185,6 @@ int mem_prealloc = 0; /* force preallocation of physical target memory */ #endif int nb_nics; NICInfo nd_table[MAX_NICS]; -int vm_running; int autostart; static int rtc_utc = 1; static int rtc_date_offset = -1; /* -1 means no change */ @@ -407,6 +406,11 @@ void runstate_set(RunState new_state) current_run_state = new_state; } +int runstate_is_running(void) +{ + return runstate_check(RSTATE_RUNNING); +} + /***********************************************************/ /* real time host monotonic timer */ @@ -1243,9 +1247,8 @@ void vm_state_notify(int running, RunState state) void vm_start(void) { - if (!vm_running) { + if (!runstate_is_running()) { cpu_enable_ticks(); - vm_running = 1; runstate_set(RSTATE_RUNNING); vm_state_notify(1, RSTATE_RUNNING); resume_all_vcpus(); diff --git a/xen-all.c b/xen-all.c index b119817f30..b5e28abd40 100644 --- a/xen-all.c +++ b/xen-all.c @@ -736,7 +736,7 @@ static void cpu_handle_ioreq(void *opaque) * guest resumes and does a hlt with interrupts disabled which * causes Xen to powerdown the domain. */ - if (vm_running) { + if (runstate_is_running()) { if (qemu_shutdown_requested_get()) { destroy_hvm_domain(); } -- cgit v1.2.1 From 6667b23f300ff08a47a73821ce2fb7f773754969 Mon Sep 17 00:00:00 2001 From: Luiz Capitulino Date: Fri, 29 Jul 2011 15:57:54 -0300 Subject: Monitor/QMP: Don't allow cont on bad VM state We have two states where issuing cont before system_reset can cause problems: RSTATE_SHUTDOWN (when -no-shutdown is used) and RSTATE_PANICKED (which only happens with kvm). This commit fixes that by doing the following when state is RSTATE_SHUTDOWN or RSTATE_PANICKED: 1. returning an error to the user/client if cont is issued 2. automatically transition to RSTATE_PAUSED during system_reset Signed-off-by: Luiz Capitulino --- monitor.c | 5 +++++ qerror.c | 4 ++++ qerror.h | 3 +++ vl.c | 4 ++++ 4 files changed, 16 insertions(+) diff --git a/monitor.c b/monitor.c index 442b4cf01d..ac68edf98b 100644 --- a/monitor.c +++ b/monitor.c @@ -1314,7 +1314,12 @@ static int do_cont(Monitor *mon, const QDict *qdict, QObject **ret_data) if (runstate_check(RSTATE_IN_MIGRATE)) { qerror_report(QERR_MIGRATION_EXPECTED); return -1; + } else if (runstate_check(RSTATE_PANICKED) || + runstate_check(RSTATE_SHUTDOWN)) { + qerror_report(QERR_RESET_REQUIRED); + return -1; } + bdrv_iterate(encrypted_bdrv_it, &context); /* only resume the vm if all keys are set and valid */ if (!context.err) { diff --git a/qerror.c b/qerror.c index 3d64b80b24..c591a5443c 100644 --- a/qerror.c +++ b/qerror.c @@ -193,6 +193,10 @@ static const QErrorStringTable qerror_table[] = { .error_fmt = QERR_QMP_EXTRA_MEMBER, .desc = "QMP input object member '%(member)' is unexpected", }, + { + .error_fmt = QERR_RESET_REQUIRED, + .desc = "Resetting the Virtual Machine is required", + }, { .error_fmt = QERR_SET_PASSWD_FAILED, .desc = "Could not set password", diff --git a/qerror.h b/qerror.h index 8058456d2e..d4070015f7 100644 --- a/qerror.h +++ b/qerror.h @@ -163,6 +163,9 @@ QError *qobject_to_qerror(const QObject *obj); #define QERR_QMP_EXTRA_MEMBER \ "{ 'class': 'QMPExtraInputObjectMember', 'data': { 'member': %s } }" +#define QERR_RESET_REQUIRED \ + "{ 'class': 'ResetRequired', 'data': {} }" + #define QERR_SET_PASSWD_FAILED \ "{ 'class': 'SetPasswdFailed', 'data': {} }" diff --git a/vl.c b/vl.c index 9128d48fea..686e491e9a 100644 --- a/vl.c +++ b/vl.c @@ -1573,6 +1573,10 @@ static void main_loop(void) cpu_synchronize_all_states(); qemu_system_reset(VMRESET_REPORT); resume_all_vcpus(); + if (runstate_check(RSTATE_PANICKED) || + runstate_check(RSTATE_SHUTDOWN)) { + runstate_set(RSTATE_PAUSED); + } } if (qemu_powerdown_requested()) { monitor_protocol_event(QEVENT_POWERDOWN, NULL); -- cgit v1.2.1 From 9e37b9dc5bf037453e062ee515014875cd05068d Mon Sep 17 00:00:00 2001 From: Luiz Capitulino Date: Mon, 29 Aug 2011 16:02:57 -0300 Subject: QMP: query-status: Introduce 'status' key This new key reports the current VM status to clients. Please, check the documentation being added in this commit for more details. Signed-off-by: Luiz Capitulino --- monitor.c | 3 +-- qmp-commands.hx | 19 ++++++++++++++++++- sysemu.h | 1 + vl.c | 23 +++++++++++++++++++++++ 4 files changed, 43 insertions(+), 3 deletions(-) diff --git a/monitor.c b/monitor.c index ac68edf98b..ab71d2d9e5 100644 --- a/monitor.c +++ b/monitor.c @@ -2636,8 +2636,7 @@ static void do_info_status_print(Monitor *mon, const QObject *data) static void do_info_status(Monitor *mon, QObject **ret_data) { - *ret_data = qobject_from_jsonf("{ 'running': %i, 'singlestep': %i }", - runstate_is_running(), singlestep); + *ret_data = qobject_from_jsonf("{ 'running': %i, 'singlestep': %i, 'status': %s }", runstate_is_running(), singlestep, runstate_as_string()); } static qemu_acl *find_acl(Monitor *mon, const char *name) diff --git a/qmp-commands.hx b/qmp-commands.hx index d1c2c5905d..d83bce5662 100644 --- a/qmp-commands.hx +++ b/qmp-commands.hx @@ -1573,11 +1573,28 @@ Return a json-object with the following information: - "running": true if the VM is running, or false if it is paused (json-bool) - "singlestep": true if the VM is in single step mode, false otherwise (json-bool) +- "status": one of the following values (json-string) + "debug" - QEMU is running on a debugger + "inmigrate" - guest is paused waiting for an incoming migration + "internal-error" - An internal error that prevents further guest + execution has occurred + "io-error" - the last IOP has failed and the device is configured + to pause on I/O errors + "paused" - guest has been paused via the 'stop' command + "postmigrate" - guest is paused following a successful 'migrate' + "prelaunch" - QEMU was started with -S and guest has not started + "finish-migrate" - guest is paused to finish the migration process + "restore-vm" - guest is paused to restore VM state + "running" - guest is actively running + "save-vm" - guest is paused to save the VM state + "shutdown" - guest is shut down (and -no-shutdown is in use) + "watchdog" - the watchdog action is configured to pause and + has been triggered Example: -> { "execute": "query-status" } -<- { "return": { "running": true, "singlestep": false } } +<- { "return": { "running": true, "singlestep": false, "status": "running" } } EQMP diff --git a/sysemu.h b/sysemu.h index 9a2c531465..43ff546f9b 100644 --- a/sysemu.h +++ b/sysemu.h @@ -39,6 +39,7 @@ void runstate_init(void); bool runstate_check(RunState state); void runstate_set(RunState new_state); int runstate_is_running(void); +const char *runstate_as_string(void); typedef struct vm_change_state_entry VMChangeStateEntry; typedef void VMChangeStateHandler(void *opaque, int running, RunState state); diff --git a/vl.c b/vl.c index 686e491e9a..08591c397b 100644 --- a/vl.c +++ b/vl.c @@ -378,6 +378,22 @@ static const RunStateTransition runstate_transitions_def[] = { static bool runstate_valid_transitions[RSTATE_MAX][RSTATE_MAX]; +static const char *const runstate_name_tbl[RSTATE_MAX] = { + [RSTATE_DEBUG] = "debug", + [RSTATE_IN_MIGRATE] = "incoming-migration", + [RSTATE_PANICKED] = "internal-error", + [RSTATE_IO_ERROR] = "io-error", + [RSTATE_PAUSED] = "paused", + [RSTATE_POST_MIGRATE] = "post-migrate", + [RSTATE_PRE_LAUNCH] = "prelaunch", + [RSTATE_PRE_MIGRATE] = "finish-migrate", + [RSTATE_RESTORE] = "restore-vm", + [RSTATE_RUNNING] = "running", + [RSTATE_SAVEVM] = "save-vm", + [RSTATE_SHUTDOWN] = "shutdown", + [RSTATE_WATCHDOG] = "watchdog", +}; + bool runstate_check(RunState state) { return current_run_state == state; @@ -406,6 +422,13 @@ void runstate_set(RunState new_state) current_run_state = new_state; } +const char *runstate_as_string(void) +{ + assert(current_run_state > RSTATE_NO_STATE && + current_run_state < RSTATE_MAX); + return runstate_name_tbl[current_run_state]; +} + int runstate_is_running(void) { return runstate_check(RSTATE_RUNNING); -- cgit v1.2.1 From 6e0ca8820dddd04056c43327f3b3699f572d03d4 Mon Sep 17 00:00:00 2001 From: Luiz Capitulino Date: Tue, 9 Aug 2011 14:44:25 -0300 Subject: HMP: info status: Print the VM state Today our printf format for the "info status" command is: VM status: %s Where the string can be "running", "running (single step mode)" or "paused". This commit extends it to: VM status: %s (%s) The second string corresponds to the "status" field as returned by the query-status QMP command and it's only printed if "status" is not "running" or "paused". Example: VM status: paused (shutdown) PS: libvirt uses "info status" when using HMP, but the new format should not break it. Signed-off-by: Luiz Capitulino --- monitor.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/monitor.c b/monitor.c index ab71d2d9e5..8ec2c5efea 100644 --- a/monitor.c +++ b/monitor.c @@ -2618,6 +2618,7 @@ static int do_inject_nmi(Monitor *mon, const QDict *qdict, QObject **ret_data) static void do_info_status_print(Monitor *mon, const QObject *data) { QDict *qdict; + const char *status; qdict = qobject_to_qdict(data); @@ -2631,6 +2632,11 @@ static void do_info_status_print(Monitor *mon, const QObject *data) monitor_printf(mon, "paused"); } + status = qdict_get_str(qdict, "status"); + if (strcmp(status, "paused") && strcmp(status, "running")) { + monitor_printf(mon, " (%s)", status); + } + monitor_printf(mon, "\n"); } -- cgit v1.2.1