Author: sephe Date: Wed Jan 27 05:19:05 2016 New Revision: 294890 URL: https://svnweb.freebsd.org/changeset/base/294890
Log: MFC r294557: hyperv/stor: Verify returned inquiry data before further dispatching Windows 10 and Window 2016 will return all zero inquiry data for non-existing slots. If we dispatched them, then a lot of useless (0 sized) disks would be created. So we verify the returned inquiry data (valid type, non-empty vendor/product/revision etc.), before further dispatching. Minor white space cleanup and wording fix. Submitted by: Hongjiang Zhang <honzhan microsoft com> Reviewed by: adrian, sephe, Jun Su <junsu microsoft com> Approved by: adrian (mentor) Modified by: sephe Sponsored by: Microsoft OSTC Differential Revision: https://reviews.freebsd.org/D4928 Modified: stable/10/sys/dev/hyperv/storvsc/hv_storvsc_drv_freebsd.c Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/dev/hyperv/storvsc/hv_storvsc_drv_freebsd.c ============================================================================== --- stable/10/sys/dev/hyperv/storvsc/hv_storvsc_drv_freebsd.c Wed Jan 27 05:15:53 2016 (r294889) +++ stable/10/sys/dev/hyperv/storvsc/hv_storvsc_drv_freebsd.c Wed Jan 27 05:19:05 2016 (r294890) @@ -1923,6 +1923,66 @@ create_storvsc_request(union ccb *ccb, s return(0); } +/* + * Modified based on scsi_print_inquiry which is responsible to + * print the detail information for scsi_inquiry_data. + * + * Return 1 if it is valid, 0 otherwise. + */ +static inline int +is_inquiry_valid(const struct scsi_inquiry_data *inq_data) +{ + uint8_t type; + char vendor[16], product[48], revision[16]; + + /* + * Check device type and qualifier + */ + if (!(SID_QUAL_IS_VENDOR_UNIQUE(inq_data) || + SID_QUAL(inq_data) == SID_QUAL_LU_CONNECTED)) + return (0); + + type = SID_TYPE(inq_data); + switch (type) { + case T_DIRECT: + case T_SEQUENTIAL: + case T_PRINTER: + case T_PROCESSOR: + case T_WORM: + case T_CDROM: + case T_SCANNER: + case T_OPTICAL: + case T_CHANGER: + case T_COMM: + case T_STORARRAY: + case T_ENCLOSURE: + case T_RBC: + case T_OCRW: + case T_OSD: + case T_ADC: + break; + case T_NODEVICE: + default: + return (0); + } + + /* + * Check vendor, product, and revision + */ + cam_strvis(vendor, inq_data->vendor, sizeof(inq_data->vendor), + sizeof(vendor)); + cam_strvis(product, inq_data->product, sizeof(inq_data->product), + sizeof(product)); + cam_strvis(revision, inq_data->revision, sizeof(inq_data->revision), + sizeof(revision)); + if (strlen(vendor) == 0 || + strlen(product) == 0 || + strlen(revision) == 0) + return (0); + + return (1); +} + /** * @brief completion function before returning to CAM * @@ -1993,11 +2053,33 @@ storvsc_io_done(struct hv_storvsc_reques ccb->ccb_h.status &= ~CAM_SIM_QUEUED; ccb->ccb_h.status &= ~CAM_STATUS_MASK; if (vm_srb->scsi_status == SCSI_STATUS_OK) { - ccb->ccb_h.status |= CAM_REQ_CMP; - } else { + const struct scsi_generic *cmd; + + /* + * Check whether the data for INQUIRY cmd is valid or + * not. Windows 10 and Windows 2016 send all zero + * inquiry data to VM even for unpopulated slots. + */ + cmd = (const struct scsi_generic *) + ((ccb->ccb_h.flags & CAM_CDB_POINTER) ? + csio->cdb_io.cdb_ptr : csio->cdb_io.cdb_bytes); + if (cmd->opcode == INQUIRY && + is_inquiry_valid( + (const struct scsi_inquiry_data *)csio->data_ptr) == 0) { + ccb->ccb_h.status |= CAM_DEV_NOT_THERE; + if (bootverbose) { + mtx_lock(&sc->hs_lock); + xpt_print(ccb->ccb_h.path, + "storvsc uninstalled device\n"); + mtx_unlock(&sc->hs_lock); + } + } else { + ccb->ccb_h.status |= CAM_REQ_CMP; + } + } else { mtx_lock(&sc->hs_lock); xpt_print(ccb->ccb_h.path, - "srovsc scsi_status = %d\n", + "storvsc scsi_status = %d\n", vm_srb->scsi_status); mtx_unlock(&sc->hs_lock); ccb->ccb_h.status |= CAM_SCSI_STATUS_ERROR; _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "[email protected]"
