[Qemu-devel] [PATCH] 9p: Print error hints if option parsing fails

[Greg Kurz]

Option parsing fonctions are called with &error_fatal, which
causes error_setg() to call exit() and the hints are never
printed.

Use an intermediate error object so that exit() happens in
error_propagate() after error_append_hint() could be called.

Signed-off-by: Greg Kurz <address@hidden>
---
 hw/9pfs/9p-local.c |   11 +++++++----
 hw/9pfs/9p-proxy.c |   11 +++++++----
 2 files changed, 14 insertions(+), 8 deletions(-)

diff --git a/hw/9pfs/9p-local.c b/hw/9pfs/9p-local.c
index 6f7309f4e691..2c80d2ac30f5 100644
--- a/hw/9pfs/9p-local.c
+++ b/hw/9pfs/9p-local.c
@@ -1486,8 +1486,9 @@ static int local_parse_opts(QemuOpts *opts, FsDriverEntry 
*fse, Error **errp)
     Error *local_err = NULL;
 
     if (!sec_model) {
-        error_setg(errp, "security_model property not set");
-        error_append_security_model_hint(errp);
+        error_setg(&local_err, "security_model property not set");
+        error_append_security_model_hint(&local_err);
+        error_propagate(errp, local_err);
         return -1;
     }
 
@@ -1501,8 +1502,10 @@ static int local_parse_opts(QemuOpts *opts, 
FsDriverEntry *fse, Error **errp)
     } else if (!strcmp(sec_model, "mapped-file")) {
         fse->export_flags |= V9FS_SM_MAPPED_FILE;
     } else {
-        error_setg(errp, "invalid security_model property '%s'", sec_model);
-        error_append_security_model_hint(errp);
+        error_setg(&local_err, "invalid security_model property '%s'",
+                   sec_model);
+        error_append_security_model_hint(&local_err);
+        error_propagate(errp, local_err);
         return -1;
     }
 
diff --git a/hw/9pfs/9p-proxy.c b/hw/9pfs/9p-proxy.c
index 97ab9c58a573..5de5e53702f7 100644
--- a/hw/9pfs/9p-proxy.c
+++ b/hw/9pfs/9p-proxy.c
@@ -1126,15 +1126,18 @@ static int proxy_parse_opts(QemuOpts *opts, 
FsDriverEntry *fs, Error **errp)
 {
     const char *socket = qemu_opt_get(opts, "socket");
     const char *sock_fd = qemu_opt_get(opts, "sock_fd");
+    Error *local_err = NULL;
 
     if (!socket && !sock_fd) {
-        error_setg(errp, "both socket and sock_fd properties are missing");
-        error_append_socket_sockfd_hint(errp);
+        error_setg(&local_err, "both socket and sock_fd properties are 
missing");
+        error_append_socket_sockfd_hint(&local_err);
+        error_propagate(errp, local_err);
         return -1;
     }
     if (socket && sock_fd) {
-        error_setg(errp, "both socket and sock_fd properties are set");
-        error_append_socket_sockfd_hint(errp);
+        error_setg(&local_err, "both socket and sock_fd properties are set");
+        error_append_socket_sockfd_hint(&local_err);
+        error_propagate(errp, local_err);
         return -1;
     }
     if (socket) {