svn commit: r302541 - head/sys/dev/hyperv/storvsc
Sepherosa Ziehau
sephe at FreeBSD.org
Mon Jul 11 05:17:49 UTC 2016
Author: sephe
Date: Mon Jul 11 05:17:48 2016
New Revision: 302541
URL: https://svnweb.freebsd.org/changeset/base/302541
Log:
hyperv/stor: Fix the INQUIRY checks
Don't check the area that the host has not filled.
PR: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=209443
PR: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=210425
Submitted by: Hongjiang Zhang <honzhan microsoft com>
Reviewed by: sephe, Dexuan Cui <decui microsoft com>
MFC after: 3 days
Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D6955
Modified:
head/sys/dev/hyperv/storvsc/hv_storvsc_drv_freebsd.c
Modified: head/sys/dev/hyperv/storvsc/hv_storvsc_drv_freebsd.c
==============================================================================
--- head/sys/dev/hyperv/storvsc/hv_storvsc_drv_freebsd.c Mon Jul 11 04:52:11 2016 (r302540)
+++ head/sys/dev/hyperv/storvsc/hv_storvsc_drv_freebsd.c Mon Jul 11 05:17:48 2016 (r302541)
@@ -1939,62 +1939,24 @@ create_storvsc_request(union ccb *ccb, s
}
/*
- * Modified based on scsi_print_inquiry which is responsible to
- * print the detail information for scsi_inquiry_data.
- *
+ * SCSI Inquiry checks qualifier and type.
+ * If qualifier is 011b, means the device server is not capable
+ * of supporting a peripheral device on this logical unit, and
+ * the type should be set to 1Fh.
+ *
* 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))
+ if (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:
+ if (type == T_NODEVICE) {
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);
}
@@ -2071,7 +2033,6 @@ storvsc_io_done(struct hv_storvsc_reques
ccb->ccb_h.status &= ~CAM_STATUS_MASK;
if (vm_srb->scsi_status == SCSI_STATUS_OK) {
const struct scsi_generic *cmd;
-
/*
* Check whether the data for INQUIRY cmd is valid or
* not. Windows 10 and Windows 2016 send all zero
@@ -2080,23 +2041,59 @@ storvsc_io_done(struct hv_storvsc_reques
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 &&
- /*
- * XXX: Temporary work around disk hot plugin on win2k12r2,
- * only filtering the invalid disk on win10 or 2016 server.
- * So, the hot plugin on win10 and 2016 server needs
- * to be fixed.
+ if (cmd->opcode == INQUIRY) {
+ /*
+ * The host of Windows 10 or 2016 server will response
+ * the inquiry request with invalid data for unexisted device:
+ [0x7f 0x0 0x5 0x2 0x1f ... ]
+ * But on windows 2012 R2, the response is:
+ [0x7f 0x0 0x0 0x0 0x0 ]
+ * That is why here wants to validate the inquiry response.
+ * The validation will skip the INQUIRY whose response is short,
+ * which is less than SHORT_INQUIRY_LENGTH (36).
+ *
+ * For more information about INQUIRY, please refer to:
+ * ftp://ftp.avc-pioneer.com/Mtfuji_7/Proposal/Jun09/INQUIRY.pdf
*/
- vmstor_proto_version == VMSTOR_PROTOCOL_VERSION_WIN10 &&
- is_inquiry_valid(
- (const struct scsi_inquiry_data *)csio->data_ptr) == 0) {
+ const struct scsi_inquiry_data *inq_data =
+ (const struct scsi_inquiry_data *)csio->data_ptr;
+ uint8_t* resp_buf = (uint8_t*)csio->data_ptr;
+ /* Get the buffer length reported by host */
+ int resp_xfer_len = vm_srb->transfer_len;
+ /* Get the available buffer length */
+ int resp_buf_len = resp_xfer_len >= 5 ? resp_buf[4] + 5 : 0;
+ int data_len = (resp_buf_len < resp_xfer_len) ? resp_buf_len : resp_xfer_len;
+ if (data_len < SHORT_INQUIRY_LENGTH) {
+ ccb->ccb_h.status |= CAM_REQ_CMP;
+ if (bootverbose && data_len >= 5) {
+ mtx_lock(&sc->hs_lock);
+ xpt_print(ccb->ccb_h.path,
+ "storvsc skips the validation for short inquiry (%d)"
+ " [%x %x %x %x %x]\n",
+ data_len,resp_buf[0],resp_buf[1],resp_buf[2],
+ resp_buf[3],resp_buf[4]);
+ mtx_unlock(&sc->hs_lock);
+ }
+ } else if (is_inquiry_valid(inq_data) == 0) {
ccb->ccb_h.status |= CAM_DEV_NOT_THERE;
+ if (bootverbose && data_len >= 5) {
+ mtx_lock(&sc->hs_lock);
+ xpt_print(ccb->ccb_h.path,
+ "storvsc uninstalled invalid device"
+ " [%x %x %x %x %x]\n",
+ resp_buf[0],resp_buf[1],resp_buf[2],resp_buf[3],resp_buf[4]);
+ mtx_unlock(&sc->hs_lock);
+ }
+ } else {
+ ccb->ccb_h.status |= CAM_REQ_CMP;
if (bootverbose) {
mtx_lock(&sc->hs_lock);
xpt_print(ccb->ccb_h.path,
- "storvsc uninstalled device\n");
+ "storvsc has passed inquiry response (%d) validation\n",
+ data_len);
mtx_unlock(&sc->hs_lock);
}
+ }
} else {
ccb->ccb_h.status |= CAM_REQ_CMP;
}
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