From: Markus Armbruster <armbru@redhat.com>
To: qemu-devel@nongnu.org
Cc: Kevin Wolf <kwolf@redhat.com>, "Michael S . Tsirkin" <mst@redhat.com>
Subject: [PATCH 12/16] vhost: Clean up how VhostOpts method vhost_get_config() fails
Date: Tue, 20 Jul 2021 14:54:04 +0200 [thread overview]
Message-ID: <20210720125408.387910-13-armbru@redhat.com> (raw)
In-Reply-To: <20210720125408.387910-1-armbru@redhat.com>
vhost_user_get_config() can fail without setting an error. Unclean.
Its caller vhost_dev_get_config() compensates by substituting a
generic error then. Goes back to commit 50de51387f "vhost:
Distinguish errors in vhost_dev_get_config()".
Clean up by moving the generic error from vhost_dev_get_config() to
all the failure paths that neglect to set an error.
Cc: Kevin Wolf <kwolf@redhat.com>
Cc: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
---
hw/virtio/vhost-user.c | 2 ++
hw/virtio/vhost.c | 10 ++--------
2 files changed, 4 insertions(+), 8 deletions(-)
diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c
index 29ea2b4fce..dbbd6fbc25 100644
--- a/hw/virtio/vhost-user.c
+++ b/hw/virtio/vhost-user.c
@@ -2139,10 +2139,12 @@ static int vhost_user_get_config(struct vhost_dev *dev, uint8_t *config,
msg.payload.config.offset = 0;
msg.payload.config.size = config_len;
if (vhost_user_write(dev, &msg, NULL, 0) < 0) {
+ error_setg_errno(errp, -EPROTO, "vhost_get_config failed");
return -EPROTO;
}
if (vhost_user_read(dev, &msg) < 0) {
+ error_setg_errno(errp, -EPROTO, "vhost_get_config failed");
return -EPROTO;
}
diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c
index dbbc6b6915..88f8a397dc 100644
--- a/hw/virtio/vhost.c
+++ b/hw/virtio/vhost.c
@@ -1564,17 +1564,11 @@ void vhost_ack_features(struct vhost_dev *hdev, const int *feature_bits,
int vhost_dev_get_config(struct vhost_dev *hdev, uint8_t *config,
uint32_t config_len, Error **errp)
{
- ERRP_GUARD();
- int ret;
-
assert(hdev->vhost_ops);
if (hdev->vhost_ops->vhost_get_config) {
- ret = hdev->vhost_ops->vhost_get_config(hdev, config, config_len, errp);
- if (ret < 0 && !*errp) {
- error_setg_errno(errp, -ret, "vhost_get_config failed");
- }
- return ret;
+ return hdev->vhost_ops->vhost_get_config(hdev, config, config_len,
+ errp);
}
error_setg(errp, "vhost_get_config not implemented");
--
2.31.1
next prev parent reply other threads:[~2021-07-20 13:02 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-20 12:53 [PATCH 00/16] Various error handling fixes and cleanups Markus Armbruster
2021-07-20 12:53 ` [PATCH 01/16] error: Use error_fatal to simplify obvious fatal errors (again) Markus Armbruster
2021-07-20 13:42 ` Eric Blake
2021-07-20 17:55 ` Peter Xu
2021-08-02 19:02 ` Philippe Mathieu-Daudé
2021-08-03 5:44 ` Markus Armbruster
2021-07-20 12:53 ` [PATCH 02/16] spapr: Plug memory leak when we can't add a migration blocker Markus Armbruster
2021-07-20 13:12 ` David Gibson
2021-08-02 18:54 ` Philippe Mathieu-Daudé
2021-07-20 12:53 ` [PATCH 03/16] spapr: Explain purpose of ->fwnmi_migration_blocker more clearly Markus Armbruster
2021-07-21 6:08 ` David Gibson
2021-07-20 12:53 ` [PATCH 04/16] multi-process: Fix pci_proxy_dev_realize() error handling Markus Armbruster
2021-07-20 18:02 ` Philippe Mathieu-Daudé
2021-07-20 20:02 ` Jag Raman
2021-07-20 12:53 ` [PATCH 05/16] vhost-scsi: Plug memory leak on migrate_add_blocker() failure Markus Armbruster
2021-07-20 12:53 ` [PATCH 06/16] i386: Never free migration blocker objects instead of sometimes Markus Armbruster
2021-07-20 12:53 ` [PATCH 07/16] vfio: Avoid error_propagate() after migrate_add_blocker() Markus Armbruster
2021-07-20 18:03 ` Philippe Mathieu-Daudé
2021-07-21 6:24 ` Kirti Wankhede
2021-07-21 9:26 ` Paolo Bonzini
2021-07-21 14:12 ` Markus Armbruster
2021-07-20 12:54 ` [PATCH 08/16] whpx nvmm: Drop useless migrate_del_blocker() Markus Armbruster
2021-07-22 8:04 ` Reinoud Zandijk
2021-07-20 12:54 ` [PATCH 09/16] migration: Unify failure check for migrate_add_blocker() Markus Armbruster
2021-07-20 18:05 ` Philippe Mathieu-Daudé
2021-07-20 12:54 ` [PATCH 10/16] migration: Handle migration_incoming_setup() errors consistently Markus Armbruster
2021-07-20 18:53 ` Eric Blake
2021-07-21 14:12 ` Markus Armbruster
2021-07-20 21:55 ` Pankaj Gupta
2021-08-02 17:53 ` Dr. David Alan Gilbert
2021-08-03 5:58 ` Markus Armbruster
2021-08-31 12:47 ` Markus Armbruster
2021-07-20 12:54 ` [PATCH 11/16] microvm: Drop dead error handling in microvm_machine_state_init() Markus Armbruster
2021-07-20 13:36 ` Sergio Lopez
2021-07-20 18:06 ` Philippe Mathieu-Daudé
2021-07-20 21:59 ` Pankaj Gupta
2021-07-20 12:54 ` Markus Armbruster [this message]
2021-08-02 18:56 ` [PATCH 12/16] vhost: Clean up how VhostOpts method vhost_get_config() fails Philippe Mathieu-Daudé
2021-08-02 18:58 ` Philippe Mathieu-Daudé
2021-08-03 5:48 ` Markus Armbruster
2021-07-20 12:54 ` [PATCH 13/16] vhost: Clean up how VhostOpts method vhost_backend_init() fails Markus Armbruster
2021-08-02 18:59 ` Philippe Mathieu-Daudé
2021-07-20 12:54 ` [PATCH 14/16] Remove superfluous ERRP_GUARD() Markus Armbruster
2021-08-02 19:00 ` Philippe Mathieu-Daudé
2021-07-20 12:54 ` [PATCH 15/16] vl: Clean up -smp error handling Markus Armbruster
2021-07-20 18:07 ` Philippe Mathieu-Daudé
2021-07-20 12:54 ` [PATCH 16/16] vl: Don't continue after -smp help Markus Armbruster
2021-07-20 18:08 ` [PATCH-for-6.1? " Philippe Mathieu-Daudé
2021-07-20 21:57 ` [PATCH " Pankaj Gupta
2021-07-24 0:30 ` [PATCH 00/16] Various error handling fixes and cleanups Michael S. Tsirkin
2021-07-29 13:23 ` Markus Armbruster
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