diff options
| author | Juan Quintela <quintela@redhat.com> | 2014-10-15 09:39:14 +0200 |
|---|---|---|
| committer | Juan Quintela <quintela@redhat.com> | 2015-07-07 14:54:52 +0200 |
| commit | df8961522a3d6bc7bb60c2830ef59e7c6c67a928 (patch) | |
| tree | c92c35029082d110bfef52e2e33d7cd089f000a9 | |
| parent | 13d16814d2058f10461e6987c8216950389c1310 (diff) | |
vmstate: Create optional sections
To make sections optional, we need to do it at the beggining of the code.
Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
| -rw-r--r-- | include/migration/vmstate.h | 2 | ||||
| -rw-r--r-- | migration/savevm.c | 8 | ||||
| -rw-r--r-- | migration/vmstate.c | 11 | ||||
| -rw-r--r-- | trace-events | 1 |
4 files changed, 22 insertions, 0 deletions
diff --git a/include/migration/vmstate.h b/include/migration/vmstate.h index 0695d7c3de..f51ff693e9 100644 --- a/include/migration/vmstate.h +++ b/include/migration/vmstate.h @@ -820,6 +820,8 @@ int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd, void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd, void *opaque, QJSON *vmdesc); +bool vmstate_save_needed(const VMStateDescription *vmsd, void *opaque); + int vmstate_register_with_alias_id(DeviceState *dev, int instance_id, const VMStateDescription *vmsd, void *base, int alias_id, diff --git a/migration/savevm.c b/migration/savevm.c index 1a9b00b320..e779c96ef9 100644 --- a/migration/savevm.c +++ b/migration/savevm.c @@ -836,6 +836,11 @@ void qemu_savevm_state_complete(QEMUFile *f) if ((!se->ops || !se->ops->save_state) && !se->vmsd) { continue; } + if (se->vmsd && !vmstate_save_needed(se->vmsd, se->opaque)) { + trace_savevm_section_skip(se->idstr, se->section_id); + continue; + } + trace_savevm_section_start(se->idstr, se->section_id); json_start_object(vmdesc, NULL); @@ -949,6 +954,9 @@ static int qemu_save_device_state(QEMUFile *f) if ((!se->ops || !se->ops->save_state) && !se->vmsd) { continue; } + if (se->vmsd && !vmstate_save_needed(se->vmsd, se->opaque)) { + continue; + } save_section_header(f, se, QEMU_VM_SECTION_FULL); diff --git a/migration/vmstate.c b/migration/vmstate.c index 6138d1acb7..e8ccf22f67 100644 --- a/migration/vmstate.c +++ b/migration/vmstate.c @@ -276,6 +276,17 @@ static void vmsd_desc_field_end(const VMStateDescription *vmsd, QJSON *vmdesc, json_end_object(vmdesc); } + +bool vmstate_save_needed(const VMStateDescription *vmsd, void *opaque) +{ + if (vmsd->needed && !vmsd->needed(opaque)) { + /* optional section not needed */ + return false; + } + return true; +} + + void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd, void *opaque, QJSON *vmdesc) { diff --git a/trace-events b/trace-events index c0111d0296..2d395c59a9 100644 --- a/trace-events +++ b/trace-events @@ -1191,6 +1191,7 @@ qemu_loadvm_state_section_partend(uint32_t section_id) "%u" qemu_loadvm_state_section_startfull(uint32_t section_id, const char *idstr, uint32_t instance_id, uint32_t version_id) "%u(%s) %u %u" savevm_section_start(const char *id, unsigned int section_id) "%s, section_id %u" savevm_section_end(const char *id, unsigned int section_id, int ret) "%s, section_id %u -> %d" +savevm_section_skip(const char *id, unsigned int section_id) "%s, section_id %u" savevm_state_begin(void) "" savevm_state_header(void) "" savevm_state_iterate(void) "" |