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mx.microsoft.com 1; spf=pass smtp.mailfrom=oracle.com; dmarc=pass action=none header.from=oracle.com; dkim=pass header.d=oracle.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.onmicrosoft.com; s=selector2-oracle-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=gVXM+soxPq3BYiSKMWJXX27hdyWbyVJjOUkYQ/otm/Y=; b=YcfGJv8Wi8Kd0eOJF3FL7Oq8/aiovSpJwVQe0qBLsSCZEzTHfyseI83n4Ud3Ft3EwRZUeqruFmkKiOqgbcOLTUGnfLLrd/6SUXrBcUkt/ZEw2jdA9lgEmkZiQi3EV1Gdi6xkCz61b93FpX3CxqLWwa3hYGuprrE5+h82UbboAEs= From: Venu Busireddy To: venu.busireddy@oracle.com, qemu-devel@nongnu.org Cc: Fam Zheng , "Michael S. Tsirkin" , Paolo Bonzini Subject: [PATCH v3] virtio-scsi: Send "REPORTED LUNS CHANGED" sense data upon disk hotplug events. 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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=205.220.165.32; envelope-from=venu.busireddy@oracle.com; helo=mx0a-00069f02.pphosted.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 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" X-ZohoMail-DKIM: pass (identity @oracle.com) X-ZM-MESSAGEID: 1664388995480100001 Content-Type: text/plain; charset="utf-8" Section 5.6.6.3 of VirtIO specification states, "Events will also be reported via sense codes..." However, no sense data is sent when VIRTIO_SCSI_EVT_RESET_RESCAN or VIRTIO_SCSI_EVT_RESET_REMOVED events are reported (when disk hotplug/hotunplug events occur). SCSI layer on Solaris depends on this sense data, and hence does not handle disk hotplug/hotunplug events. When disk inventory changes, return a CHECK_CONDITION status with sense data of 0x06/0x3F/0x0E (sense code REPORTED_LUNS_CHANGED), as per the specifications in Section 5.14 (h) of SAM-4. Signed-off-by: Venu Busireddy v2 -> v3: - Implement the suggestion from Paolo Bonzini . v1 -> v2: - Send the sense data for VIRTIO_SCSI_EVT_RESET_REMOVED event too. --- hw/scsi/scsi-bus.c | 1 + hw/scsi/virtio-scsi.c | 16 ++++++++++++++++ include/hw/scsi/scsi.h | 6 ++++++ include/hw/virtio/virtio-scsi.h | 1 + 4 files changed, 24 insertions(+) diff --git a/hw/scsi/scsi-bus.c b/hw/scsi/scsi-bus.c index 4403717c4aaf..b7cb249f2eab 100644 --- a/hw/scsi/scsi-bus.c +++ b/hw/scsi/scsi-bus.c @@ -730,6 +730,7 @@ SCSIRequest *scsi_req_new(SCSIDevice *d, uint32_t tag, = uint32_t lun, */ !(buf[0] =3D=3D REQUEST_SENSE && d->sense_is_ua))) { ops =3D &reqops_unit_attention; + d->clear_reported_luns_changed =3D true; } else if (lun !=3D d->lun || buf[0] =3D=3D REPORT_LUNS || (buf[0] =3D=3D REQUEST_SENSE && d->sense_len)) { diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c index 41f2a5630173..b7f66d366fcb 100644 --- a/hw/scsi/virtio-scsi.c +++ b/hw/scsi/virtio-scsi.c @@ -695,9 +695,23 @@ static int virtio_scsi_handle_cmd_req_prepare(VirtIOSC= SI *s, VirtIOSCSIReq *req) return -ENOENT; } virtio_scsi_ctx_check(s, d); + + if (s->reported_luns_changed) { + scsi_device_set_ua(d, SENSE_CODE(REPORTED_LUNS_CHANGED)); + } + + /* + * set d->clear_reported_luns_changed. + * scsi_req_new() will clear it if the required conditions are met. + */ + d->clear_reported_luns_changed =3D false; req->sreq =3D scsi_req_new(d, req->req.cmd.tag, virtio_scsi_get_lun(req->req.cmd.lun), req->req.cmd.cdb, vs->cdb_size, req); + if (d->clear_reported_luns_changed) { + s->reported_luns_changed =3D false; + d->clear_reported_luns_changed =3D false; + } =20 if (req->sreq->cmd.mode !=3D SCSI_XFER_NONE && (req->sreq->cmd.mode !=3D req->mode || @@ -956,6 +970,7 @@ static void virtio_scsi_hotplug(HotplugHandler *hotplug= _dev, DeviceState *dev, virtio_scsi_push_event(s, sd, VIRTIO_SCSI_T_TRANSPORT_RESET, VIRTIO_SCSI_EVT_RESET_RESCAN); + s->reported_luns_changed =3D true; virtio_scsi_release(s); } } @@ -973,6 +988,7 @@ static void virtio_scsi_hotunplug(HotplugHandler *hotpl= ug_dev, DeviceState *dev, virtio_scsi_push_event(s, sd, VIRTIO_SCSI_T_TRANSPORT_RESET, VIRTIO_SCSI_EVT_RESET_REMOVED); + s->reported_luns_changed =3D true; virtio_scsi_release(s); } =20 diff --git a/include/hw/scsi/scsi.h b/include/hw/scsi/scsi.h index 001103488c23..ea81c6f89e74 100644 --- a/include/hw/scsi/scsi.h +++ b/include/hw/scsi/scsi.h @@ -89,6 +89,12 @@ struct SCSIDevice uint32_t io_timeout; bool needs_vpd_bl_emulation; bool hba_supports_iothread; + /* + * clear_reported_luns_changed is used, if the required + * conditions are met, to inform the virtio-scsi layer that + * any pending REPORTED_LUNS_CHANGED condition can be cleared. + */ + bool clear_reported_luns_changed; }; =20 extern const VMStateDescription vmstate_scsi_device; diff --git a/include/hw/virtio/virtio-scsi.h b/include/hw/virtio/virtio-scs= i.h index a36aad9c8695..efbcf9ba069a 100644 --- a/include/hw/virtio/virtio-scsi.h +++ b/include/hw/virtio/virtio-scsi.h @@ -81,6 +81,7 @@ struct VirtIOSCSI { SCSIBus bus; int resetting; bool events_dropped; + bool reported_luns_changed; =20 /* Fields for dataplane below */ AioContext *ctx; /* one iothread per virtio-scsi-pci for now */