src-test/sys/dev/hyperv/storvsc/hv_vstorage.h, branch main

Hyper-V: storvsc: Enhance srb_status code handling.

2020-08-31T09:05:45Z

In hv_storvsc_io_request() when coring, prevent changing of the send channel from the base channel to another one. storvsc_poll always probes on the base channel. Based upon conversations with Microsoft, changed the handling of srb_status codes. Most we should never get, others yes. All are treated as retry-able except for two. We should not get these statuses, but if we ever do, the I/O state is not known. Submitted by: Alexander Sideropoulos Reviewed by: trasz, allanjude, whu MFC after: 1 week Sponsored by: Netapp Inc Differential Revision: https://reviews.freebsd.org/D25756

storvsc: port a Linux patch, properly set residual data length on errors

2020-01-14T13:20:16Z

This change is based on Linux commit 40630f462824ee. csio.resid should account for transfer_len only for success and SRB_STATUS_DATA_OVERRUN condition. I am not sure how exactly this change works, but I have a report from a user that they see lots of checksum errors when running a pool scrub concurrently with iozone -l 1 -s 100G. After applying this patch the problem cannot be reproduced. Reviewed by: nobody Sponsored by: CyberSecure Differential Revision: https://reviews.freebsd.org/D22312

sys/dev: further adoption of SPDX licensing ID tags.

2017-11-27T14:52:40Z

Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.

hyperv: Update copyright for the files changed in 2017

2017-08-14T06:00:50Z

MFC after: 3 days Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D11982

hyperv/storvsc: Fixup SRB status.

2017-04-05T08:15:47Z

This unbreaks GEN2 Hyper-V cd support. Submitted by: Hongjiang Zhang Reviewed by: dexuan@ MFC after: 3 days Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D10212

hyperv/storvsc: Increase queue depth and rework channel selection.

2016-08-25T05:50:19Z

- Increasing queue depth gives ~100% performance improvement for randwrite fio test in Azure. - New channel selection, which takes LUN id and the current cpuid into consideration, gives additional ~20% performance improvement for ranwrite fio test in Azure. Submitted by: Hongzhang Jiang Modified by: sephe MFC after: 1 week Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D7622

hyperv/storvsc: Deliver CAM_SEL_TIMEOUT upon SRB status error.

2016-08-17T05:02:18Z

SRB status is set to 0x20 by the hypervisor, if the specified LUN is unaccessible, and even worse the INQUIRY response will not be set by the hypervisor at all under this situation. Additionally, SRB status is 0x20 too, for TUR on an unaccessible LUN. Deliver CAM_SEL_TIMEOUT to CAM upon SRB status errors as suggested by Scott Long, other values seems improper. This commit fixes the Hyper-V disk hotplug support. Submitted by: Hongjiang Zhang MFC after: 3 days Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D7521

hyperv/stor: Enable INQUIRY result check only on WIN10 like host systems

2016-05-12T03:29:29Z

On WIN8 like host systems, when rescan happens, the already installed disks seem to return random invalid results for INQUIRY. More investigation is under way to figure out why random invalid INQUIRY results are delivered to VM on WIN8 like host systems. Submitted by: Hongjiang Zhang Reviewed by: sephe MFC after: 1 week Sponsored by: Microsoft OSTC Differential Revision: https://reviews.freebsd.org/D6316

Add support for SCSI disk hot add and remove. Also add padding according to

2015-05-18T10:31:23Z

the requirement of different hypervisor releases. Submitted by: whu Reviewed by: royger Approved by: royger MFC after: 1 week Sponsored by: Microsoft OSTC Differential Revision: https://reviews.freebsd.org/D2512

Microsoft vmbus, storage and other related driver enhancements for HyperV.

2015-04-29T10:12:34Z

- Vmbus multi channel support. - Vector interrupt support. - Signal optimization. - Storvsc driver performance improvement. - Scatter and gather support for storvsc driver. - Minor bug fix for KVP driver. Thanks royger, jhb and delphij from FreeBSD community for the reviews and comments. Also thanks Hovy Xu from NetApp for the contributions to the storvsc driver. PR: 195238 Submitted by: whu Reviewed by: royger, jhb, delphij Approved by: royger MFC after: 2 weeks Relnotes: yes Sponsored by: Microsoft OSTC