From: KY Srinivasan <kys@microsoft.com> To: "Martin K. Petersen" <martin.petersen@oracle.com> Cc: "hch@infradead.org" <hch@infradead.org>, James Bottomley <jbottomley@parallels.com>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, "devel@linuxdriverproject.org" <devel@linuxdriverproject.org>, "apw@canonical.com" <apw@canonical.com>, "stable@vger.kernel.org" <stable@vger.kernel.org>, "linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>, "ohering@suse.com" <ohering@suse.com>, "jasowang@redhat.com" <jasowang@redhat.com> Subject: RE: [PATCH 4/8] Drivers: scsi: storvsc: Filter WRITE_SAME_16 Date: Mon, 14 Jul 2014 02:37:50 +0000 [thread overview] Message-ID: <ba0ec0e3d04748eab3fb26e3c4964b4d@BY2PR03MB299.namprd03.prod.outlook.com> (raw) In-Reply-To: yq1a98d2z5x.fsf@sermon.lab.mkp.net > -----Original Message----- > From: KY Srinivasan > Sent: Sunday, July 13, 2014 11:50 AM > To: 'Martin K. Petersen' > Cc: hch@infradead.org; James Bottomley; linux-kernel@vger.kernel.org; > devel@linuxdriverproject.org; apw@canonical.com; stable@vger.kernel.org; > linux-scsi@vger.kernel.org; ohering@suse.com; jasowang@redhat.com > Subject: RE: [PATCH 4/8] Drivers: scsi: storvsc: Filter WRITE_SAME_16 > > > > > -----Original Message----- > > From: Martin K. Petersen [mailto:martin.petersen@oracle.com] > > Sent: Sunday, July 13, 2014 5:59 AM > > To: KY Srinivasan > > Cc: hch@infradead.org; James Bottomley; linux-kernel@vger.kernel.org; > > devel@linuxdriverproject.org; apw@canonical.com; > > stable@vger.kernel.org; linux-scsi@vger.kernel.org; ohering@suse.com; > > jasowang@redhat.com > > Subject: Re: [PATCH 4/8] Drivers: scsi: storvsc: Filter WRITE_SAME_16 > > > > >>>>> "KY" == KY Srinivasan <kys@microsoft.com> writes: > > > > KY> Windows hosts do support UNMAP and set the field in the EVPD. > > KY> However, since the host advertises SPC-2 compliance, Linux does > > KY> not even query the VPD page. > > > > >> If we want to enable UNMAP in this case I'd prefer a blacklist > > >> entry than trying UNMAP despite the device not advertising it. > > > > I agree with that. We could do something like the patch below. > > > > However, I do think it's a good idea that you guys are looking into > > reporting SPC-3. > > Thanks Martin; this patch would address our present issues. I will get some > testing done and report back. How should we force the flag (BLIST_TRY_VPD_PAGES) to be set. K. Y > > Regards, > > K. Y > > > > > > SCSI: Add a blacklist flag which enables VPD page inquiries > > > > Despite supporting modern SCSI features some storage devices continue > > to claim conformance to an older version of the SPC spec. This is done > > for compatibility with legacy operating systems. > > > > Linux by default will not attempt to read VPD pages on devices that > > claim > > SPC-2 or older. Introduce a blacklist flag that can be used to trigger > > VPD page inquiries on devices that are known to support them. > > > > Reported-by: KY Srinivasan <kys@microsoft.com> > > Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> > > > > diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c index > > 4a6e4ba5a400..a5b1a224628a 100644 > > --- a/drivers/scsi/scsi_scan.c > > +++ b/drivers/scsi/scsi_scan.c > > @@ -949,7 +949,9 @@ static int scsi_add_lun(struct scsi_device *sdev, > > unsigned char *inq_result, > > > > sdev->eh_timeout = SCSI_DEFAULT_EH_TIMEOUT; > > > > - if (*bflags & BLIST_SKIP_VPD_PAGES) > > + if (*bflags & BLIST_TRY_VPD_PAGES) > > + sdev->try_vpd_pages = 1; > > + else if (*bflags & BLIST_SKIP_VPD_PAGES) > > sdev->skip_vpd_pages = 1; > > > > transport_configure_device(&sdev->sdev_gendev); > > diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index > > 87566b51fcf7..31d32b9077ca 100644 > > --- a/drivers/scsi/sd.c > > +++ b/drivers/scsi/sd.c > > @@ -2701,6 +2701,11 @@ static void sd_read_write_same(struct scsi_disk > > *sdkp, unsigned char *buffer) > > > > static int sd_try_extended_inquiry(struct scsi_device *sdp) { > > + /* Attempt VPD inquiry if the device blacklist explicitly calls > > + * for it. > > + */ > > + if (sdp->try_vpd_pages) > > + return 1; > > /* > > * Although VPD inquiries can go to SCSI-2 type devices, > > * some USB ones crash on receiving them, and the pages diff --git > > a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h index > > 9aa38f7b303b..f579408620f0 100644 > > --- a/include/scsi/scsi_device.h > > +++ b/include/scsi/scsi_device.h > > @@ -155,6 +155,7 @@ struct scsi_device { > > unsigned skip_ms_page_8:1; /* do not use MODE SENSE page 0x08 > > */ > > unsigned skip_ms_page_3f:1; /* do not use MODE SENSE page 0x3f > > */ > > unsigned skip_vpd_pages:1; /* do not read VPD pages */ > > + unsigned try_vpd_pages:1; /* attempt to read VPD pages */ > > unsigned use_192_bytes_for_3f:1; /* ask for 192 bytes from page > 0x3f > > */ > > unsigned no_start_on_add:1; /* do not issue start on add */ > > unsigned allow_restart:1; /* issue START_UNIT in error handler */ > > diff --git a/include/scsi/scsi_devinfo.h b/include/scsi/scsi_devinfo.h > > index 8670c04e199e..1fdd6fc5492b 100644 > > --- a/include/scsi/scsi_devinfo.h > > +++ b/include/scsi/scsi_devinfo.h > > @@ -34,4 +34,5 @@ > > #define BLIST_SKIP_VPD_PAGES 0x4000000 /* Ignore SBC-3 VPD pages > > */ > > #define BLIST_SCSI3LUN 0x8000000 /* Scan more than 256 > > LUNs > > for sequential scan */ > > +#define BLIST_TRY_VPD_PAGES 0x10000000 /* Attempt to read VPD > > pages */ > > #endif
WARNING: multiple messages have this Message-ID (diff)
From: KY Srinivasan <kys@microsoft.com> To: "Martin K. Petersen" <martin.petersen@oracle.com> Cc: "linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>, "jasowang@redhat.com" <jasowang@redhat.com>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, "stable@vger.kernel.org" <stable@vger.kernel.org>, "ohering@suse.com" <ohering@suse.com>, "hch@infradead.org" <hch@infradead.org>, James Bottomley <jbottomley@parallels.com>, "apw@canonical.com" <apw@canonical.com>, "devel@linuxdriverproject.org" <devel@linuxdriverproject.org> Subject: RE: [PATCH 4/8] Drivers: scsi: storvsc: Filter WRITE_SAME_16 Date: Mon, 14 Jul 2014 02:37:50 +0000 [thread overview] Message-ID: <ba0ec0e3d04748eab3fb26e3c4964b4d@BY2PR03MB299.namprd03.prod.outlook.com> (raw) In-Reply-To: yq1a98d2z5x.fsf@sermon.lab.mkp.net > -----Original Message----- > From: KY Srinivasan > Sent: Sunday, July 13, 2014 11:50 AM > To: 'Martin K. Petersen' > Cc: hch@infradead.org; James Bottomley; linux-kernel@vger.kernel.org; > devel@linuxdriverproject.org; apw@canonical.com; stable@vger.kernel.org; > linux-scsi@vger.kernel.org; ohering@suse.com; jasowang@redhat.com > Subject: RE: [PATCH 4/8] Drivers: scsi: storvsc: Filter WRITE_SAME_16 > > > > > -----Original Message----- > > From: Martin K. Petersen [mailto:martin.petersen@oracle.com] > > Sent: Sunday, July 13, 2014 5:59 AM > > To: KY Srinivasan > > Cc: hch@infradead.org; James Bottomley; linux-kernel@vger.kernel.org; > > devel@linuxdriverproject.org; apw@canonical.com; > > stable@vger.kernel.org; linux-scsi@vger.kernel.org; ohering@suse.com; > > jasowang@redhat.com > > Subject: Re: [PATCH 4/8] Drivers: scsi: storvsc: Filter WRITE_SAME_16 > > > > >>>>> "KY" == KY Srinivasan <kys@microsoft.com> writes: > > > > KY> Windows hosts do support UNMAP and set the field in the EVPD. > > KY> However, since the host advertises SPC-2 compliance, Linux does > > KY> not even query the VPD page. > > > > >> If we want to enable UNMAP in this case I'd prefer a blacklist > > >> entry than trying UNMAP despite the device not advertising it. > > > > I agree with that. We could do something like the patch below. > > > > However, I do think it's a good idea that you guys are looking into > > reporting SPC-3. > > Thanks Martin; this patch would address our present issues. I will get some > testing done and report back. How should we force the flag (BLIST_TRY_VPD_PAGES) to be set. K. Y > > Regards, > > K. Y > > > > > > SCSI: Add a blacklist flag which enables VPD page inquiries > > > > Despite supporting modern SCSI features some storage devices continue > > to claim conformance to an older version of the SPC spec. This is done > > for compatibility with legacy operating systems. > > > > Linux by default will not attempt to read VPD pages on devices that > > claim > > SPC-2 or older. Introduce a blacklist flag that can be used to trigger > > VPD page inquiries on devices that are known to support them. > > > > Reported-by: KY Srinivasan <kys@microsoft.com> > > Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> > > > > diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c index > > 4a6e4ba5a400..a5b1a224628a 100644 > > --- a/drivers/scsi/scsi_scan.c > > +++ b/drivers/scsi/scsi_scan.c > > @@ -949,7 +949,9 @@ static int scsi_add_lun(struct scsi_device *sdev, > > unsigned char *inq_result, > > > > sdev->eh_timeout = SCSI_DEFAULT_EH_TIMEOUT; > > > > - if (*bflags & BLIST_SKIP_VPD_PAGES) > > + if (*bflags & BLIST_TRY_VPD_PAGES) > > + sdev->try_vpd_pages = 1; > > + else if (*bflags & BLIST_SKIP_VPD_PAGES) > > sdev->skip_vpd_pages = 1; > > > > transport_configure_device(&sdev->sdev_gendev); > > diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index > > 87566b51fcf7..31d32b9077ca 100644 > > --- a/drivers/scsi/sd.c > > +++ b/drivers/scsi/sd.c > > @@ -2701,6 +2701,11 @@ static void sd_read_write_same(struct scsi_disk > > *sdkp, unsigned char *buffer) > > > > static int sd_try_extended_inquiry(struct scsi_device *sdp) { > > + /* Attempt VPD inquiry if the device blacklist explicitly calls > > + * for it. > > + */ > > + if (sdp->try_vpd_pages) > > + return 1; > > /* > > * Although VPD inquiries can go to SCSI-2 type devices, > > * some USB ones crash on receiving them, and the pages diff --git > > a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h index > > 9aa38f7b303b..f579408620f0 100644 > > --- a/include/scsi/scsi_device.h > > +++ b/include/scsi/scsi_device.h > > @@ -155,6 +155,7 @@ struct scsi_device { > > unsigned skip_ms_page_8:1; /* do not use MODE SENSE page 0x08 > > */ > > unsigned skip_ms_page_3f:1; /* do not use MODE SENSE page 0x3f > > */ > > unsigned skip_vpd_pages:1; /* do not read VPD pages */ > > + unsigned try_vpd_pages:1; /* attempt to read VPD pages */ > > unsigned use_192_bytes_for_3f:1; /* ask for 192 bytes from page > 0x3f > > */ > > unsigned no_start_on_add:1; /* do not issue start on add */ > > unsigned allow_restart:1; /* issue START_UNIT in error handler */ > > diff --git a/include/scsi/scsi_devinfo.h b/include/scsi/scsi_devinfo.h > > index 8670c04e199e..1fdd6fc5492b 100644 > > --- a/include/scsi/scsi_devinfo.h > > +++ b/include/scsi/scsi_devinfo.h > > @@ -34,4 +34,5 @@ > > #define BLIST_SKIP_VPD_PAGES 0x4000000 /* Ignore SBC-3 VPD pages > > */ > > #define BLIST_SCSI3LUN 0x8000000 /* Scan more than 256 > > LUNs > > for sequential scan */ > > +#define BLIST_TRY_VPD_PAGES 0x10000000 /* Attempt to read VPD > > pages */ > > #endif
next prev parent reply other threads:[~2014-07-14 2:38 UTC|newest] Thread overview: 117+ messages / expand[flat|nested] mbox.gz Atom feed top 2014-07-09 0:46 [PATCH 0/8] Drivers: scsi: storvsc: Bug fixes and improvements K. Y. Srinivasan 2014-07-09 0:46 ` K. Y. Srinivasan 2014-07-09 0:46 ` [PATCH 1/8] Drivers: scsi: storvsc: Change the limits to reflect the values on the host K. Y. Srinivasan 2014-07-09 0:46 ` K. Y. Srinivasan 2014-07-09 0:46 ` [PATCH 2/8] Drivers: scsi: storvsc: Filter commands based on the storage protocol version K. Y. Srinivasan 2014-07-09 0:46 ` K. Y. Srinivasan 2014-07-09 8:40 ` Christoph Hellwig 2014-07-09 20:02 ` KY Srinivasan 2014-07-09 20:02 ` KY Srinivasan 2014-07-09 0:46 ` [PATCH 3/8] Drivers: scsi: storvsc: Fix a bug in handling VMBUS " K. Y. Srinivasan 2014-07-09 0:46 ` K. Y. Srinivasan 2014-07-09 8:41 ` Christoph Hellwig 2014-07-09 20:01 ` KY Srinivasan 2014-07-09 0:46 ` [PATCH 4/8] Drivers: scsi: storvsc: Filter WRITE_SAME_16 K. Y. Srinivasan 2014-07-09 0:46 ` K. Y. Srinivasan 2014-07-09 8:43 ` Christoph Hellwig 2014-07-09 8:43 ` Christoph Hellwig 2014-07-09 19:52 ` KY Srinivasan 2014-07-09 19:52 ` KY Srinivasan 2014-07-09 19:56 ` James Bottomley 2014-07-09 19:56 ` James Bottomley 2014-07-09 21:14 ` KY Srinivasan 2014-07-09 21:14 ` KY Srinivasan 2014-07-09 22:27 ` James Bottomley 2014-07-09 22:27 ` James Bottomley 2014-07-09 22:36 ` KY Srinivasan 2014-07-10 10:07 ` hch 2014-07-10 21:02 ` KY Srinivasan 2014-07-10 21:02 ` KY Srinivasan 2014-07-10 22:12 ` James Bottomley 2014-07-10 22:12 ` James Bottomley 2014-07-10 22:12 ` James Bottomley 2014-07-11 6:32 ` hch 2014-07-11 6:32 ` hch 2014-07-11 12:54 ` Martin K. Petersen 2014-07-11 12:54 ` Martin K. Petersen 2014-07-12 2:53 ` KY Srinivasan 2014-07-12 2:50 ` KY Srinivasan 2014-07-13 12:58 ` Martin K. Petersen 2014-07-13 12:58 ` Martin K. Petersen 2014-07-13 18:49 ` KY Srinivasan 2014-07-13 18:49 ` KY Srinivasan 2014-07-14 2:37 ` KY Srinivasan [this message] 2014-07-14 2:37 ` KY Srinivasan 2014-07-14 3:19 ` KY Srinivasan 2014-07-16 11:01 ` hch 2014-07-16 11:01 ` hch 2014-07-16 14:53 ` James Bottomley 2014-07-16 14:53 ` James Bottomley 2014-07-16 15:44 ` Martin K. Petersen 2014-07-16 15:44 ` Martin K. Petersen 2014-07-16 17:38 ` hch 2014-07-16 17:38 ` hch 2014-07-16 17:47 ` Martin K. Petersen 2014-07-16 17:47 ` Martin K. Petersen 2014-07-16 17:55 ` hch 2014-07-16 17:55 ` hch 2014-07-16 18:02 ` James Bottomley 2014-07-16 18:43 ` Elliott, Robert (Server Storage) 2014-07-16 19:20 ` Martin K. Petersen 2014-07-16 19:20 ` Martin K. Petersen 2014-07-17 7:42 ` hch 2014-07-17 12:41 ` Martin K. Petersen 2014-07-17 12:41 ` Martin K. Petersen 2014-07-16 18:45 ` Martin K. Petersen 2014-07-16 18:45 ` Martin K. Petersen 2014-07-16 18:50 ` James Bottomley 2014-07-16 18:50 ` James Bottomley 2014-07-16 19:08 ` Martin K. Petersen 2014-07-16 19:08 ` Martin K. Petersen 2014-07-16 19:14 ` James Bottomley 2014-07-16 19:14 ` James Bottomley 2014-07-16 19:44 ` Martin K. Petersen 2014-07-16 19:44 ` Martin K. Petersen 2014-07-09 0:46 ` [PATCH 5/8] Drivers: scsi: storvsc: Fix a bug in the handling of SRB status flags K. Y. Srinivasan 2014-07-09 0:46 ` K. Y. Srinivasan 2014-07-09 8:43 ` Christoph Hellwig 2014-07-09 8:43 ` Christoph Hellwig 2014-07-09 0:46 ` [PATCH 6/8] Drivers: scsi: storvsc: Implement an abort handler K. Y. Srinivasan 2014-07-09 0:46 ` K. Y. Srinivasan 2014-07-09 8:44 ` Christoph Hellwig 2014-07-09 8:44 ` Christoph Hellwig 2014-07-09 18:51 ` KY Srinivasan 2014-07-10 10:13 ` Christoph Hellwig 2014-07-10 10:13 ` Christoph Hellwig 2014-07-10 22:26 ` KY Srinivasan 2014-07-11 9:52 ` Hannes Reinecke 2014-07-11 9:52 ` Hannes Reinecke 2014-07-11 9:54 ` Christoph Hellwig 2014-07-11 9:54 ` Christoph Hellwig 2014-07-11 14:49 ` KY Srinivasan 2014-07-11 14:49 ` KY Srinivasan 2014-07-10 10:33 ` Richard Weinberger 2014-07-12 16:16 ` Richard Weinberger 2014-07-12 16:16 ` Richard Weinberger 2014-07-12 16:35 ` KY Srinivasan 2014-07-12 16:35 ` KY Srinivasan 2014-07-09 0:46 ` [PATCH 7/8] drivers: scsi: storvsc: Set srb_flags in all cases K. Y. Srinivasan 2014-07-09 0:46 ` K. Y. Srinivasan 2014-07-09 8:44 ` Christoph Hellwig 2014-07-09 18:40 ` KY Srinivasan 2014-07-09 18:40 ` KY Srinivasan 2014-07-10 10:17 ` Christoph Hellwig 2014-07-10 22:22 ` KY Srinivasan 2014-07-10 10:18 ` Christoph Hellwig 2014-07-10 10:18 ` Christoph Hellwig 2014-07-11 21:03 ` KY Srinivasan 2014-07-09 0:46 ` [PATCH 8/8] drivers: scsi: storvsc: Correctly handle TEST_UNIT_READY failure K. Y. Srinivasan 2014-07-09 0:46 ` K. Y. Srinivasan 2014-07-09 8:46 ` Christoph Hellwig 2014-07-09 18:35 ` KY Srinivasan 2014-07-09 18:35 ` KY Srinivasan 2014-07-09 8:39 ` [PATCH 1/8] Drivers: scsi: storvsc: Change the limits to reflect the values on the host Christoph Hellwig 2014-07-09 20:07 ` KY Srinivasan 2014-07-09 20:07 ` KY Srinivasan 2014-07-09 23:39 ` KY Srinivasan 2014-07-09 23:39 ` KY Srinivasan
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