qed: mark more functions as coroutine_fns and GRAPH_RDLOCK

Mark functions as coroutine_fn when they are only called by other coroutine_fns
and they can suspend.  Change calls to co_wrappers to use the non-wrapped
functions, which in turn requires adding GRAPH_RDLOCK annotations.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <20230601115145.196465-3-pbonzini@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

block/qed-check.c

@@ -200,7 +200,8 @@ static void qed_check_for_leaks(QEDCheck *check)
 /**
  * Mark an image clean once it passes check or has been repaired
  */
-static void qed_check_mark_clean(BDRVQEDState *s, BdrvCheckResult *result)
+static void coroutine_fn GRAPH_RDLOCK
+qed_check_mark_clean(BDRVQEDState *s, BdrvCheckResult *result)
 {
     /* Skip if there were unfixable corruptions or I/O errors */
     if (result->corruptions > 0 || result->check_errors > 0) {
@@ -213,7 +214,7 @@ static void qed_check_mark_clean(BDRVQEDState *s, BdrvCheckResult *result)
     }
 
     /* Ensure fixes reach storage before clearing check bit */
-    bdrv_flush(s->bs);
+    bdrv_co_flush(s->bs);
 
     s->header.features &= ~QED_F_NEED_CHECK;
     qed_write_header_sync(s);

block/qed.c

@@ -195,14 +195,15 @@ static bool qed_is_image_size_valid(uint64_t image_size, uint32_t cluster_size,
  *
  * The string is NUL-terminated.
  */
-static int qed_read_string(BdrvChild *file, uint64_t offset, size_t n,
-                           char *buf, size_t buflen)
+static int coroutine_fn GRAPH_RDLOCK
+qed_read_string(BdrvChild *file, uint64_t offset,
+                size_t n, char *buf, size_t buflen)
 {
     int ret;
     if (n >= buflen) {
         return -EINVAL;
     }
-    ret = bdrv_pread(file, offset, n, buf, 0);
+    ret = bdrv_co_pread(file, offset, n, buf, 0);
     if (ret < 0) {
         return ret;
     }