fsdev: improve error handling of backend init

This patch changes some error messages in the backend init code and
convert backends to propagate QEMU Error objects instead of calling
error_report().

One notable improvement is that the local backend now provides a more
detailed error report when it fails to open the shared directory.

Signed-off-by: Greg Kurz <groug@kaod.org>

1 files changed, 3 insertions, 3 deletions

diff --git a/hw/9pfs/9p.c b/hw/9pfs/9p.c
index 1e4ebbe576..909a611394 100644
--- a/hw/9pfs/9p.c
+++ b/hw/9pfs/9p.c
@@ -3542,9 +3542,9 @@ int v9fs_device_realize_common(V9fsState *s, Error **errp)
     s->fid_list = NULL;
     qemu_co_rwlock_init(&s->rename_lock);
 
-    if (s->ops->init(&s->ctx) < 0) {
-        error_setg(errp, "9pfs Failed to initialize fs-driver with id:%s"
-                   " and export path:%s", s->fsconf.fsdev_id, s->ctx.fs_root);
+    if (s->ops->init(&s->ctx, errp) < 0) {
+        error_prepend(errp, "cannot initialize fsdev '%s': ",
+                      s->fsconf.fsdev_id);
         goto out;
     }