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Thu, 15 Oct 2020 18:05:34 +0000 Received: from abhmp0018.oracle.com (abhmp0018.oracle.com [141.146.116.24]) by aserv0122.oracle.com (8.14.4/8.14.4) with ESMTP id 09FI5XQe007890; Thu, 15 Oct 2020 18:05:33 GMT Received: from jaraman-bur-1.us.oracle.com (/10.152.33.39) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 15 Oct 2020 11:05:33 -0700 From: Jagannathan Raman To: qemu-devel@nongnu.org Subject: [PATCH v11 08/19] multi-process: Associate fd of a PCIDevice with its object Date: Thu, 15 Oct 2020 14:05:01 -0400 Message-Id: <956a7c7931dabee483b4d815c9ef9b3f28130d72.1602784930.git.jag.raman@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: References: In-Reply-To: References: MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9775 signatures=668682 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxlogscore=999 mlxscore=0 spamscore=0 adultscore=0 suspectscore=4 phishscore=0 bulkscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2010150121 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9775 signatures=668682 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 impostorscore=0 suspectscore=4 priorityscore=1501 phishscore=0 clxscore=1015 spamscore=0 adultscore=0 mlxscore=0 malwarescore=0 bulkscore=0 mlxlogscore=999 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2010150121 Received-SPF: pass client-ip=141.146.126.79; envelope-from=jag.raman@oracle.com; helo=aserp2130.oracle.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/10/15 11:04:16 X-ACL-Warn: Detected OS = Linux 3.1-3.10 [fuzzy] X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 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_MED=-2.3, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, UNPARSEABLE_RELAY=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: elena.ufimtseva@oracle.com, fam@euphon.net, swapnil.ingle@nutanix.com, john.g.johnson@oracle.com, kraxel@redhat.com, jag.raman@oracle.com, quintela@redhat.com, mst@redhat.com, armbru@redhat.com, kanth.ghatraju@oracle.com, felipe@nutanix.com, thuth@redhat.com, ehabkost@redhat.com, konrad.wilk@oracle.com, dgilbert@redhat.com, alex.williamson@redhat.com, stefanha@redhat.com, thanos.makatos@nutanix.com, rth@twiddle.net, kwolf@redhat.com, berrange@redhat.com, mreitz@redhat.com, ross.lagerwall@citrix.com, marcandre.lureau@gmail.com, pbonzini@redhat.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Associate the file descriptor for a PCIDevice in remote process with DeviceState object. Signed-off-by: Elena Ufimtseva Signed-off-by: John G Johnson Signed-off-by: Jagannathan Raman Reviewed-by: Stefan Hajnoczi --- MAINTAINERS | 2 + hw/i386/meson.build | 1 + hw/i386/remote-msg.c | 1 + hw/i386/remote-obj.c | 154 +++++++++++++++++++++++++++++++++++++++++++ include/hw/i386/remote-obj.h | 42 ++++++++++++ 5 files changed, 200 insertions(+) create mode 100644 hw/i386/remote-obj.c create mode 100644 include/hw/i386/remote-obj.h diff --git a/MAINTAINERS b/MAINTAINERS index 7314536..487ab13 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -3107,6 +3107,8 @@ F: include/hw/i386/remote.h F: io/mpqemu-link.c F: include/io/mpqemu-link.h F: hw/i386/remote-msg.c +F: include/hw/i386/remote-obj.h +F: hw/i386/remote-obj.c Build and test automation ------------------------- diff --git a/hw/i386/meson.build b/hw/i386/meson.build index 3a2aa6e..9735f6b 100644 --- a/hw/i386/meson.build +++ b/hw/i386/meson.build @@ -26,6 +26,7 @@ i386_ss.add(when: 'CONFIG_PC', if_true: files( 'port92.c')) i386_ss.add(when: 'CONFIG_MPQEMU', if_true: files('remote.c')) i386_ss.add(when: 'CONFIG_MPQEMU', if_true: files('remote-msg.c')) +i386_ss.add(when: 'CONFIG_MPQEMU', if_true: files('remote-obj.c')) subdir('kvm') subdir('xen') diff --git a/hw/i386/remote-msg.c b/hw/i386/remote-msg.c index 83fd7bd..6451b77 100644 --- a/hw/i386/remote-msg.c +++ b/hw/i386/remote-msg.c @@ -56,6 +56,7 @@ void coroutine_fn mpqemu_remote_msg_loop_co(void *data) } } qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN); + g_free(com); return; } diff --git a/hw/i386/remote-obj.c b/hw/i386/remote-obj.c new file mode 100644 index 0000000..a9a732a --- /dev/null +++ b/hw/i386/remote-obj.c @@ -0,0 +1,154 @@ +/* + * Copyright © 2020 Oracle and/or its affiliates. + * + * This work is licensed under the terms of the GNU GPL-v2, version 2 or later. + * + * See the COPYING file in the top-level directory. + * + */ + +#include "qemu/osdep.h" +#include "qemu-common.h" + +#include "hw/i386/remote-obj.h" +#include "qemu/error-report.h" +#include "qom/object_interfaces.h" +#include "hw/qdev-core.h" +#include "io/channel.h" +#include "hw/qdev-core.h" +#include "hw/i386/remote.h" +#include "io/channel-util.h" +#include "qapi/error.h" +#include "sysemu/sysemu.h" +#include "hw/pci/pci.h" + +static void remote_object_set_fd(Object *obj, const char *str, Error **errp) +{ + RemoteObject *o = REMOTE_OBJECT(obj); + + o->fd = atoi(str); +} + +static void remote_object_set_devid(Object *obj, const char *str, Error **errp) +{ + RemoteObject *o = REMOTE_OBJECT(obj); + + g_free(o->devid); + + o->devid = g_strdup(str); +} + +static void property_release_remote_object(Object *obj, const char *name, + void *opaque) +{ + Object *remote_object = OBJECT(opaque); + + object_unref(remote_object); +} + +static void remote_object_machine_done(Notifier *notifier, void *data) +{ + RemoteObject *o = container_of(notifier, RemoteObject, machine_done); + DeviceState *dev = NULL; + QIOChannel *ioc = NULL; + Coroutine *co = NULL; + RemoteCommDev *comdev = NULL; + Error *err = NULL; + + dev = qdev_find_recursive(sysbus_get_default(), o->devid); + if (!dev || !object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) { + error_report("%s is not a PCI device", o->devid); + return; + } + + ioc = qio_channel_new_fd(o->fd, &err); + if (!ioc) { + error_report_err(err); + return; + } + qio_channel_set_blocking(ioc, false, NULL); + + object_property_add(OBJECT(dev), "remote-object", "object", NULL, NULL, + property_release_remote_object, (void *)OBJECT(o)); + /* co-routine should free this. */ + comdev = g_new0(RemoteCommDev, 1); + *comdev = (RemoteCommDev) { + .ioc = ioc, + .dev = PCI_DEVICE(dev), + }; + + co = qemu_coroutine_create(mpqemu_remote_msg_loop_co, comdev); + qemu_coroutine_enter(co); +} + +static void remote_object_init(Object *obj) +{ + RemoteObjectClass *k = REMOTE_OBJECT_GET_CLASS(obj); + RemoteObject *o = REMOTE_OBJECT(obj); + + if (k->nr_devs >= k->max_devs) { + error_report("Reached maximum number of devices: %u", k->max_devs); + return; + } + + o->ioc = NULL; + o->fd = -1; + o->devid = NULL; + + k->nr_devs++; + + object_property_add_str(obj, "fd", NULL, remote_object_set_fd); + object_property_set_description(obj, "fd", + "file descriptor for the object"); + object_property_add_str(obj, "devid", NULL, remote_object_set_devid); + object_property_set_description(obj, "devid", + "id of device to associate"); + + o->machine_done.notify = remote_object_machine_done; + qemu_add_machine_init_done_notifier(&o->machine_done); +} + +static void remote_object_finalize(Object *obj) +{ + RemoteObjectClass *k = REMOTE_OBJECT_GET_CLASS(obj); + RemoteObject *o = REMOTE_OBJECT(obj); + + if (o->ioc) { + qio_channel_shutdown(o->ioc, QIO_CHANNEL_SHUTDOWN_BOTH, NULL); + qio_channel_close(o->ioc, NULL); + } + + object_unref(OBJECT(o->ioc)); + + k->nr_devs--; + g_free(o->devid); +} + +static void remote_object_class_init(ObjectClass *klass, void *data) +{ + RemoteObjectClass *k = REMOTE_OBJECT_CLASS(klass); + + k->max_devs = 1; + k->nr_devs = 0; +} + +static const TypeInfo remote_object_info = { + .name = TYPE_REMOTE_OBJECT, + .parent = TYPE_OBJECT, + .instance_size = sizeof(RemoteObject), + .instance_init = remote_object_init, + .instance_finalize = remote_object_finalize, + .class_size = sizeof(RemoteObjectClass), + .class_init = remote_object_class_init, + .interfaces = (InterfaceInfo[]) { + { TYPE_USER_CREATABLE }, + { } + } +}; + +static void register_types(void) +{ + type_register_static(&remote_object_info); +} + +type_init(register_types); diff --git a/include/hw/i386/remote-obj.h b/include/hw/i386/remote-obj.h new file mode 100644 index 0000000..0e95813 --- /dev/null +++ b/include/hw/i386/remote-obj.h @@ -0,0 +1,42 @@ +/* + * Copyright © 2020 Oracle and/or its affiliates. + * + * This work is licensed under the terms of the GNU GPL-v2, version 2 or later. + * + * See the COPYING file in the top-level directory. + * + */ + +#ifndef REMOTE_OBJECT_H +#define REMOTE_OBJECT_H + +#include "io/channel.h" +#include "qemu/notify.h" + +#define TYPE_REMOTE_OBJECT "x-remote-object" +#define REMOTE_OBJECT(obj) \ + OBJECT_CHECK(RemoteObject, (obj), TYPE_REMOTE_OBJECT) +#define REMOTE_OBJECT_GET_CLASS(obj) \ + OBJECT_GET_CLASS(RemoteObjectClass, (obj), TYPE_REMOTE_OBJECT) +#define REMOTE_OBJECT_CLASS(klass) \ + OBJECT_CLASS_CHECK(RemoteObjectClass, (klass), TYPE_REMOTE_OBJECT) + +typedef struct { + ObjectClass parent_class; + + unsigned int nr_devs; + unsigned int max_devs; +} RemoteObjectClass; + +typedef struct { + /* private */ + Object parent; + + Notifier machine_done; + + int fd; + char *devid; + QIOChannel *ioc; +} RemoteObject; + +#endif