Merge remote-tracking branch 'remotes/armbru/tags/pull-error-2020-07-07-v2' into staging

Error reporting patches patches for 2020-07-07

# gpg: Signature made Fri 10 Jul 2020 14:24:42 BST
# gpg:                using RSA key 354BC8B3D7EB2A6B68674E5F3870B400EB918653
# gpg:                issuer "armbru@redhat.com"
# gpg: Good signature from "Markus Armbruster <armbru@redhat.com>" [full]
# gpg:                 aka "Markus Armbruster <armbru@pond.sub.org>" [full]
# Primary key fingerprint: 354B C8B3 D7EB 2A6B 6867  4E5F 3870 B400 EB91 8653

* remotes/armbru/tags/pull-error-2020-07-07-v2: (53 commits)
  xen: Use ERRP_GUARD()
  nbd: Use ERRP_GUARD()
  virtio-9p: Use ERRP_GUARD()
  fw_cfg: Use ERRP_GUARD()
  pflash: Use ERRP_GUARD()
  sd: Use ERRP_GUARD()
  scripts: Coccinelle script to use ERRP_GUARD()
  error: New macro ERRP_GUARD()
  hmp: Ignore Error objects where the return value suffices
  qdev: Ignore Error objects where the return value suffices
  qemu-img: Ignore Error objects where the return value suffices
  error: Avoid error_propagate() after migrate_add_blocker()
  qapi: Purge error_propagate() from QAPI core
  qapi: Smooth visitor error checking in generated code
  qapi: Smooth another visitor error checking pattern
  block/parallels: Simplify parallels_open() after previous commit
  error: Reduce unnecessary error propagation
  error: Eliminate error_propagate() manually
  error: Eliminate error_propagate() with Coccinelle, part 2
  error: Eliminate error_propagate() with Coccinelle, part 1
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 8 insertions, 23 deletions

diff --git a/qemu-img.c b/qemu-img.c
index 53bd32bf8f..498fbf42fe 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -465,23 +465,18 @@ static int add_old_style_options(const char *fmt, QemuOpts *opts,
                                  const char *base_filename,
                                  const char *base_fmt)
 {
-    Error *err = NULL;
-
     if (base_filename) {
-        qemu_opt_set(opts, BLOCK_OPT_BACKING_FILE, base_filename, &err);
-        if (err) {
+        if (!qemu_opt_set(opts, BLOCK_OPT_BACKING_FILE, base_filename,
+                          NULL)) {
             error_report("Backing file not supported for file format '%s'",
                          fmt);
-            error_free(err);
             return -1;
         }
     }
     if (base_fmt) {
-        qemu_opt_set(opts, BLOCK_OPT_BACKING_FMT, base_fmt, &err);
-        if (err) {
+        if (!qemu_opt_set(opts, BLOCK_OPT_BACKING_FMT, base_fmt, NULL)) {
             error_report("Backing file format not supported for file "
                          "format '%s'", fmt);
-            error_free(err);
             return -1;
         }
     }
@@ -2487,8 +2482,7 @@ static int img_convert(int argc, char **argv)
 
         opts = qemu_opts_create(create_opts, NULL, 0, &error_abort);
         if (options) {
-            qemu_opts_do_parse(opts, options, NULL, &local_err);
-            if (local_err) {
+            if (!qemu_opts_do_parse(opts, options, NULL, &local_err)) {
                 error_report_err(local_err);
                 ret = -1;
                 goto out;
@@ -3963,8 +3957,7 @@ static int img_resize(int argc, char **argv)
 
     /* Parse size */
     param = qemu_opts_create(&resize_options, NULL, 0, &error_abort);
-    qemu_opt_set(param, BLOCK_OPT_SIZE, size, &err);
-    if (err) {
+    if (!qemu_opt_set(param, BLOCK_OPT_SIZE, size, &err)) {
         error_report_err(err);
         ret = -1;
         qemu_opts_del(param);
@@ -4215,21 +4208,14 @@ static int img_amend(int argc, char **argv)
 
     amend_opts = qemu_opts_append(amend_opts, bs->drv->amend_opts);
     opts = qemu_opts_create(amend_opts, NULL, 0, &error_abort);
-    qemu_opts_do_parse(opts, options, NULL, &err);
-
-    if (err) {
+    if (!qemu_opts_do_parse(opts, options, NULL, &err)) {
         /* Try to parse options using the create options */
-        Error *err1 = NULL;
         amend_opts = qemu_opts_append(amend_opts, bs->drv->create_opts);
         qemu_opts_del(opts);
         opts = qemu_opts_create(amend_opts, NULL, 0, &error_abort);
-        qemu_opts_do_parse(opts, options, NULL, &err1);
-
-        if (!err1) {
+        if (qemu_opts_do_parse(opts, options, NULL, NULL)) {
             error_append_hint(&err,
                               "This option is only supported for image creation\n");
-        } else {
-            error_free(err1);
         }
 
         error_report_err(err);
@@ -5363,8 +5349,7 @@ static int img_measure(int argc, char **argv)
     create_opts = qemu_opts_append(create_opts, bdrv_file.create_opts);
     opts = qemu_opts_create(create_opts, NULL, 0, &error_abort);
     if (options) {
-        qemu_opts_do_parse(opts, options, NULL, &local_err);
-        if (local_err) {
+        if (!qemu_opts_do_parse(opts, options, NULL, &local_err)) {
             error_report_err(local_err);
             error_report("Invalid options for file format '%s'", out_fmt);
             goto out;