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Merge section header writing 

The header writing for device sections is open coded in
a few places, merge it into one.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Dr. David Alan Gilbert 2015-05-19 12:29:50 +01:00 committed by Juan Quintela
parent 1a8f46f8d6
commit ce39bfc918
1 changed files with 28 additions and 44 deletions
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72
migration/savevm.c
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@ -611,6 +611,27 @@ static void vmstate_save(QEMUFile *f, SaveStateEntry *se, QJSON *vmdesc)
vmstate_save_state(f, se->vmsd, se->opaque, vmdesc);
}
/*
* Write the header for device section (QEMU_VM_SECTION START/END/PART/FULL)
*/
static void save_section_header(QEMUFile *f, SaveStateEntry *se,
uint8_t section_type)
{
qemu_put_byte(f, section_type);
qemu_put_be32(f, se->section_id);
if (section_type == QEMU_VM_SECTION_FULL ||
section_type == QEMU_VM_SECTION_START) {
/* ID string */
size_t len = strlen(se->idstr);
qemu_put_byte(f, len);
qemu_put_buffer(f, (uint8_t *)se->idstr, len);
qemu_put_be32(f, se->instance_id);
qemu_put_be32(f, se->version_id);
}
}
bool qemu_savevm_state_blocked(Error **errp)
{
SaveStateEntry *se;
@ -647,8 +668,6 @@ void qemu_savevm_state_begin(QEMUFile *f,
}
QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
int len;
if (!se->ops || !se->ops->save_live_setup) {
continue;
}
@ -657,17 +676,7 @@ void qemu_savevm_state_begin(QEMUFile *f,
continue;
}
}
/* Section type */
qemu_put_byte(f, QEMU_VM_SECTION_START);
qemu_put_be32(f, se->section_id);
/* ID string */
len = strlen(se->idstr);
qemu_put_byte(f, len);
qemu_put_buffer(f, (uint8_t *)se->idstr, len);
qemu_put_be32(f, se->instance_id);
qemu_put_be32(f, se->version_id);
save_section_header(f, se, QEMU_VM_SECTION_START);
ret = se->ops->save_live_setup(f, se->opaque);
if (ret < 0) {
@ -702,9 +711,8 @@ int qemu_savevm_state_iterate(QEMUFile *f)
return 0;
}
trace_savevm_section_start(se->idstr, se->section_id);
/* Section type */
qemu_put_byte(f, QEMU_VM_SECTION_PART);
qemu_put_be32(f, se->section_id);
save_section_header(f, se, QEMU_VM_SECTION_PART);
ret = se->ops->save_live_iterate(f, se->opaque);
trace_savevm_section_end(se->idstr, se->section_id, ret);
@ -750,9 +758,8 @@ void qemu_savevm_state_complete(QEMUFile *f)
}
}
trace_savevm_section_start(se->idstr, se->section_id);
/* Section type */
qemu_put_byte(f, QEMU_VM_SECTION_END);
qemu_put_be32(f, se->section_id);
save_section_header(f, se, QEMU_VM_SECTION_END);
ret = se->ops->save_live_complete(f, se->opaque);
trace_savevm_section_end(se->idstr, se->section_id, ret);
@ -766,7 +773,6 @@ void qemu_savevm_state_complete(QEMUFile *f)
json_prop_int(vmdesc, "page_size", TARGET_PAGE_SIZE);
json_start_array(vmdesc, "devices");
QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
int len;
if ((!se->ops || !se->ops->save_state) && !se->vmsd) {
continue;
@ -777,17 +783,7 @@ void qemu_savevm_state_complete(QEMUFile *f)
json_prop_str(vmdesc, "name", se->idstr);
json_prop_int(vmdesc, "instance_id", se->instance_id);
/* Section type */
qemu_put_byte(f, QEMU_VM_SECTION_FULL);
qemu_put_be32(f, se->section_id);
/* ID string */
len = strlen(se->idstr);
qemu_put_byte(f, len);
qemu_put_buffer(f, (uint8_t *)se->idstr, len);
qemu_put_be32(f, se->instance_id);
qemu_put_be32(f, se->version_id);
save_section_header(f, se, QEMU_VM_SECTION_FULL);
vmstate_save(f, se, vmdesc);
@ -887,8 +883,6 @@ static int qemu_save_device_state(QEMUFile *f)
cpu_synchronize_all_states();
QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
int len;
if (se->is_ram) {
continue;
}
@ -896,17 +890,7 @@ static int qemu_save_device_state(QEMUFile *f)
continue;
}
/* Section type */
qemu_put_byte(f, QEMU_VM_SECTION_FULL);
qemu_put_be32(f, se->section_id);
/* ID string */
len = strlen(se->idstr);
qemu_put_byte(f, len);
qemu_put_buffer(f, (uint8_t *)se->idstr, len);
qemu_put_be32(f, se->instance_id);
qemu_put_be32(f, se->version_id);
save_section_header(f, se, QEMU_VM_SECTION_FULL);
vmstate_save(f, se, NULL);
}