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Tsirkin" , kraxel@redhat.com, stefanha@gmail.com, Albert Esteve , marcandre.lureau@gmail.com Subject: [PATCH 2/3] hw/virtio: cleanup shared resources Date: Tue, 7 Nov 2023 10:37:43 +0100 Message-ID: <20231107093744.388099-3-aesteve@redhat.com> In-Reply-To: <20231107093744.388099-1-aesteve@redhat.com> References: <20231107093744.388099-1-aesteve@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.7 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.129.124; envelope-from=aesteve@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1699349941296100003 Content-Type: text/plain; charset="utf-8" Ensure that we cleanup all virtio shared resources when the vhost devices is cleaned up (after a hot unplug, or a crash). To track all owned uuids of a device, add a GSList to the vhost_dev struct. This way we can avoid traversing the full table for every cleanup, whether they actually own any shared resource or not. Signed-off-by: Albert Esteve --- hw/virtio/vhost-user.c | 2 ++ hw/virtio/vhost.c | 4 ++++ include/hw/virtio/vhost.h | 6 ++++++ 3 files changed, 12 insertions(+) diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c index 5fdff0241f..04848d1fa0 100644 --- a/hw/virtio/vhost-user.c +++ b/hw/virtio/vhost-user.c @@ -1598,6 +1598,7 @@ vhost_user_backend_handle_shared_object_add(struct vh= ost_dev *dev, QemuUUID uuid; =20 memcpy(uuid.data, object->uuid, sizeof(object->uuid)); + dev->shared_uuids =3D g_slist_append(dev->shared_uuids, &uuid); return virtio_add_vhost_device(&uuid, dev); } =20 @@ -1623,6 +1624,7 @@ vhost_user_backend_handle_shared_object_remove(struct= vhost_dev *dev, } =20 memcpy(uuid.data, object->uuid, sizeof(object->uuid)); + dev->shared_uuids =3D g_slist_remove_all(dev->shared_uuids, &uuid); return virtio_remove_resource(&uuid); } =20 diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c index 9c9ae7109e..3aff94664b 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c @@ -16,6 +16,7 @@ #include "qemu/osdep.h" #include "qapi/error.h" #include "hw/virtio/vhost.h" +#include "hw/virtio/virtio-dmabuf.h" #include "qemu/atomic.h" #include "qemu/range.h" #include "qemu/error-report.h" @@ -1599,6 +1600,9 @@ void vhost_dev_cleanup(struct vhost_dev *hdev) migrate_del_blocker(&hdev->migration_blocker); g_free(hdev->mem); g_free(hdev->mem_sections); + /* free virtio shared objects */ + g_slist_foreach(hdev->shared_uuids, (GFunc)virtio_remove_resource, NUL= L); + g_slist_free_full(g_steal_pointer(&hdev->shared_uuids), g_free); if (hdev->vhost_ops) { hdev->vhost_ops->vhost_backend_cleanup(hdev); } diff --git a/include/hw/virtio/vhost.h b/include/hw/virtio/vhost.h index 5e8183f64a..376bc8446d 100644 --- a/include/hw/virtio/vhost.h +++ b/include/hw/virtio/vhost.h @@ -118,6 +118,12 @@ struct vhost_dev { */ uint64_t protocol_features; =20 + /** + * @shared_uuids: contains the UUIDs of all the exported + * virtio objects owned by the vhost device. + */ + GSList *shared_uuids; + uint64_t max_queues; uint64_t backend_cap; /* @started: is the vhost device started? */ --=20 2.41.0