migration: Change ram_dirty_bitmap_reload() retval to bool
Now we have a Error** passed into the return path thread stack, which is
even clearer than an int retval. Change ram_dirty_bitmap_reload() and the
callers to use a bool instead to replace errnos.
Suggested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Message-ID: <20231017202633.296756-5-peterx@redhat.com>
diff --git a/migration/migration.c b/migration/migration.c
index e875ea0..ce9b769 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -1971,29 +1971,29 @@
ram_save_queue_pages(rbname, start, len, errp);
}
-static int migrate_handle_rp_recv_bitmap(MigrationState *s, char *block_name,
- Error **errp)
+static bool migrate_handle_rp_recv_bitmap(MigrationState *s, char *block_name,
+ Error **errp)
{
RAMBlock *block = qemu_ram_block_by_name(block_name);
if (!block) {
error_setg(errp, "MIG_RP_MSG_RECV_BITMAP has invalid block name '%s'",
block_name);
- return -EINVAL;
+ return false;
}
/* Fetch the received bitmap and refresh the dirty bitmap */
return ram_dirty_bitmap_reload(s, block, errp);
}
-static int migrate_handle_rp_resume_ack(MigrationState *s,
- uint32_t value, Error **errp)
+static bool migrate_handle_rp_resume_ack(MigrationState *s,
+ uint32_t value, Error **errp)
{
trace_source_return_path_thread_resume_ack(value);
if (value != MIGRATION_RESUME_ACK_VALUE) {
error_setg(errp, "illegal resume_ack value %"PRIu32, value);
- return -1;
+ return false;
}
/* Now both sides are active. */
@@ -2003,7 +2003,7 @@
/* Notify send thread that time to continue send pages */
migration_rp_kick(s);
- return 0;
+ return true;
}
/*
@@ -2154,14 +2154,14 @@
}
/* Format: len (1B) + idstr (<255B). This ends the idstr. */
buf[buf[0] + 1] = '\0';
- if (migrate_handle_rp_recv_bitmap(ms, (char *)(buf + 1), &err)) {
+ if (!migrate_handle_rp_recv_bitmap(ms, (char *)(buf + 1), &err)) {
goto out;
}
break;
case MIG_RP_MSG_RESUME_ACK:
tmp32 = ldl_be_p(buf);
- if (migrate_handle_rp_resume_ack(ms, tmp32, &err)) {
+ if (!migrate_handle_rp_resume_ack(ms, tmp32, &err)) {
goto out;
}
break;
diff --git a/migration/ram.c b/migration/ram.c
index 929cba0..a0f3b86 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -4113,10 +4113,11 @@
* Read the received bitmap, revert it as the initial dirty bitmap.
* This is only used when the postcopy migration is paused but wants
* to resume from a middle point.
+ *
+ * Returns true if succeeded, false for errors.
*/
-int ram_dirty_bitmap_reload(MigrationState *s, RAMBlock *block, Error **errp)
+bool ram_dirty_bitmap_reload(MigrationState *s, RAMBlock *block, Error **errp)
{
- int ret = -EINVAL;
/* from_dst_file is always valid because we're within rp_thread */
QEMUFile *file = s->rp_state.from_dst_file;
g_autofree unsigned long *le_bitmap = NULL;
@@ -4130,7 +4131,7 @@
if (s->state != MIGRATION_STATUS_POSTCOPY_RECOVER) {
error_setg(errp, "Reload bitmap in incorrect state %s",
MigrationStatus_str(s->state));
- return -EINVAL;
+ return false;
}
/*
@@ -4148,24 +4149,23 @@
if (size != local_size) {
error_setg(errp, "ramblock '%s' bitmap size mismatch (0x%"PRIx64
" != 0x%"PRIx64")", block->idstr, size, local_size);
- return -EINVAL;
+ return false;
}
size = qemu_get_buffer(file, (uint8_t *)le_bitmap, local_size);
end_mark = qemu_get_be64(file);
- ret = qemu_file_get_error(file);
- if (ret || size != local_size) {
- error_setg(errp, "read bitmap failed for ramblock '%s': %d"
- " (size 0x%"PRIx64", got: 0x%"PRIx64")",
- block->idstr, ret, local_size, size);
- return -EIO;
+ if (qemu_file_get_error(file) || size != local_size) {
+ error_setg(errp, "read bitmap failed for ramblock '%s': "
+ "(size 0x%"PRIx64", got: 0x%"PRIx64")",
+ block->idstr, local_size, size);
+ return false;
}
if (end_mark != RAMBLOCK_RECV_BITMAP_ENDING) {
error_setg(errp, "ramblock '%s' end mark incorrect: 0x%"PRIx64,
block->idstr, end_mark);
- return -EINVAL;
+ return false;
}
/*
@@ -4197,7 +4197,7 @@
*/
migration_rp_kick(s);
- return 0;
+ return true;
}
static int ram_resume_prepare(MigrationState *s, void *opaque)
diff --git a/migration/ram.h b/migration/ram.h
index 6e2c2c1..9b937a4 100644
--- a/migration/ram.h
+++ b/migration/ram.h
@@ -71,7 +71,7 @@
void ramblock_recv_bitmap_set_range(RAMBlock *rb, void *host_addr, size_t nr);
int64_t ramblock_recv_bitmap_send(QEMUFile *file,
const char *block_name);
-int ram_dirty_bitmap_reload(MigrationState *s, RAMBlock *rb, Error **errp);
+bool ram_dirty_bitmap_reload(MigrationState *s, RAMBlock *rb, Error **errp);
bool ramblock_page_is_discarded(RAMBlock *rb, ram_addr_t start);
void postcopy_preempt_shutdown_file(MigrationState *s);
void *postcopy_preempt_thread(void *opaque);
