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savevm: Convert savevm handlers list to TAILQ 

Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Juan Quintela 2009-09-01 02:12:31 +02:00 committed by Anthony Liguori
parent 93ec8b321c
commit 8718e999b3
1 changed files with 42 additions and 52 deletions
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94
savevm.c
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@ -890,6 +890,7 @@ const VMStateInfo vmstate_info_buffer = {
};
typedef struct SaveStateEntry {
TAILQ_ENTRY(SaveStateEntry) entry;
char idstr[256];
int instance_id;
int version_id;
@ -899,12 +900,26 @@ typedef struct SaveStateEntry {
LoadStateHandler *load_state;
const VMStateDescription *vmsd;
void *opaque;
struct SaveStateEntry *next;
} SaveStateEntry;
static SaveStateEntry *first_se;
static TAILQ_HEAD(savevm_handlers, SaveStateEntry) savevm_handlers =
TAILQ_HEAD_INITIALIZER(savevm_handlers);
static int global_section_id;
static int calculate_new_instance_id(const char *idstr)
{
SaveStateEntry *se;
int instance_id = 0;
TAILQ_FOREACH(se, &savevm_handlers, entry) {
if (strcmp(idstr, se->idstr) == 0
&& instance_id <= se->instance_id) {
instance_id = se->instance_id + 1;
}
}
return instance_id;
}
/* TODO: Individual devices generally have very little idea about the rest
of the system, so instance_id should be removed/replaced.
Meanwhile pass -1 as instance_id if you do not already have a clearly
@ -917,11 +932,10 @@ int register_savevm_live(const char *idstr,
LoadStateHandler *load_state,
void *opaque)
{
SaveStateEntry *se, **pse;
SaveStateEntry *se;
se = qemu_malloc(sizeof(SaveStateEntry));
pstrcpy(se->idstr, sizeof(se->idstr), idstr);
se->instance_id = (instance_id == -1) ? 0 : instance_id;
se->version_id = version_id;
se->section_id = global_section_id++;
se->save_live_state = save_live_state;
@ -929,18 +943,14 @@ int register_savevm_live(const char *idstr,
se->load_state = load_state;
se->opaque = opaque;
se->vmsd = NULL;
se->next = NULL;
/* add at the end of list */
pse = &first_se;
while (*pse != NULL) {
if (instance_id == -1
&& strcmp(se->idstr, (*pse)->idstr) == 0
&& se->instance_id <= (*pse)->instance_id)
se->instance_id = (*pse)->instance_id + 1;
pse = &(*pse)->next;
if (instance_id == -1) {
se->instance_id = calculate_new_instance_id(idstr);
} else {
se->instance_id = instance_id;
}
*pse = se;
/* add at the end of list */
TAILQ_INSERT_TAIL(&savevm_handlers, se, entry);
return 0;
}
@ -957,28 +967,23 @@ int register_savevm(const char *idstr,
void unregister_savevm(const char *idstr, void *opaque)
{
SaveStateEntry **pse;
SaveStateEntry *se, *new_se;
pse = &first_se;
while (*pse != NULL) {
if (strcmp((*pse)->idstr, idstr) == 0 && (*pse)->opaque == opaque) {
SaveStateEntry *next = (*pse)->next;
qemu_free(*pse);
*pse = next;
continue;
TAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) {
if (strcmp(se->idstr, idstr) == 0 && se->opaque == opaque) {
TAILQ_REMOVE(&savevm_handlers, se, entry);
qemu_free(se);
}
pse = &(*pse)->next;
}
}
int vmstate_register(int instance_id, const VMStateDescription *vmsd,
void *opaque)
{
SaveStateEntry *se, **pse;
SaveStateEntry *se;
se = qemu_malloc(sizeof(SaveStateEntry));
pstrcpy(se->idstr, sizeof(se->idstr), vmsd->name);
se->instance_id = (instance_id == -1) ? 0 : instance_id;
se->version_id = vmsd->version_id;
se->section_id = global_section_id++;
se->save_live_state = NULL;
@ -986,35 +991,20 @@ int vmstate_register(int instance_id, const VMStateDescription *vmsd,
se->load_state = NULL;
se->opaque = opaque;
se->vmsd = vmsd;
se->next = NULL;
/* add at the end of list */
pse = &first_se;
while (*pse != NULL) {
if (instance_id == -1
&& strcmp(se->idstr, (*pse)->idstr) == 0
&& se->instance_id <= (*pse)->instance_id)
se->instance_id = (*pse)->instance_id + 1;
pse = &(*pse)->next;
if (instance_id == -1) {
se->instance_id = calculate_new_instance_id(vmsd->name);
} else {
se->instance_id = instance_id;
}
*pse = se;
/* add at the end of list */
TAILQ_INSERT_TAIL(&savevm_handlers, se, entry);
return 0;
}
void vmstate_unregister(const char *idstr, void *opaque)
{
SaveStateEntry **pse;
pse = &first_se;
while (*pse != NULL) {
if (strcmp((*pse)->idstr, idstr) == 0 && (*pse)->opaque == opaque) {
SaveStateEntry *next = (*pse)->next;
qemu_free(*pse);
*pse = next;
continue;
}
pse = &(*pse)->next;
}
unregister_savevm(idstr, opaque);
}
int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd,
@ -1129,7 +1119,7 @@ int qemu_savevm_state_begin(QEMUFile *f)
qemu_put_be32(f, QEMU_VM_FILE_MAGIC);
qemu_put_be32(f, QEMU_VM_FILE_VERSION);
for (se = first_se; se != NULL; se = se->next) {
TAILQ_FOREACH(se, &savevm_handlers, entry) {
int len;
if (se->save_live_state == NULL)
@ -1161,7 +1151,7 @@ int qemu_savevm_state_iterate(QEMUFile *f)
SaveStateEntry *se;
int ret = 1;
for (se = first_se; se != NULL; se = se->next) {
TAILQ_FOREACH(se, &savevm_handlers, entry) {
if (se->save_live_state == NULL)
continue;
@ -1185,7 +1175,7 @@ int qemu_savevm_state_complete(QEMUFile *f)
{
SaveStateEntry *se;
for (se = first_se; se != NULL; se = se->next) {
TAILQ_FOREACH(se, &savevm_handlers, entry) {
if (se->save_live_state == NULL)
continue;
@ -1196,7 +1186,7 @@ int qemu_savevm_state_complete(QEMUFile *f)
se->save_live_state(f, QEMU_VM_SECTION_END, se->opaque);
}
for(se = first_se; se != NULL; se = se->next) {
TAILQ_FOREACH(se, &savevm_handlers, entry) {
int len;
if (se->save_state == NULL && se->vmsd == NULL)
@ -1261,7 +1251,7 @@ static SaveStateEntry *find_se(const char *idstr, int instance_id)
{
SaveStateEntry *se;
for(se = first_se; se != NULL; se = se->next) {
TAILQ_FOREACH(se, &savevm_handlers, entry) {
if (!strcmp(se->idstr, idstr) &&
instance_id == se->instance_id)
return se;