From: Johannes Thumshirn <jthumshirn@suse.de>
To: KY Srinivasan <kys@microsoft.com>
Cc: Keith Mange <Keith.Mange@microsoft.com>,
"gregkh\@linuxfoundation.org" <gregkh@linuxfoundation.org>,
"linux-kernel\@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"devel\@linuxdriverproject.org" <devel@linuxdriverproject.org>,
"ohering\@suse.com" <ohering@suse.com>,
"jbottomley\@parallels.com" <jbottomley@parallels.com>,
"hch\@infradead.org" <hch@infradead.org>,
"linux-scsi\@vger.kernel.org" <linux-scsi@vger.kernel.org>,
"apw\@canonical.com" <apw@canonical.com>,
"vkuznets\@redhat.com" <vkuznets@redhat.com>,
"jasowang\@redhat.com" <jasowang@redhat.com>
Subject: Re: [PATCH RESEND V2 3/7] scsi: storvsc: Untangle the storage protocol negotiation from the vmbus protocol negotiation.
Date: Fri, 14 Aug 2015 08:45:57 +0200 [thread overview]
Message-ID: <mqdwpwy74gq.fsf@c203.arch.suse.de> (raw)
In-Reply-To: <SN1PR0301MB166260423693200F01696E72A07D0@SN1PR0301MB1662.namprd03.prod.outlook.com> (KY Srinivasan's message of "Thu, 13 Aug 2015 15:18:57 +0000")
KY Srinivasan <kys@microsoft.com> writes:
>> -----Original Message-----
>> From: Johannes Thumshirn [mailto:jthumshirn@suse.de]
>> Sent: Thursday, August 13, 2015 7:34 AM
>> To: KY Srinivasan <kys@microsoft.com>; Keith Mange
>> <Keith.Mange@microsoft.com>
>> Cc: gregkh@linuxfoundation.org; linux-kernel@vger.kernel.org;
>> devel@linuxdriverproject.org; ohering@suse.com;
>> jbottomley@parallels.com; hch@infradead.org; linux-scsi@vger.kernel.org;
>> apw@canonical.com; vkuznets@redhat.com; jasowang@redhat.com
>> Subject: Re: [PATCH RESEND V2 3/7] scsi: storvsc: Untangle the storage
>> protocol negotiation from the vmbus protocol negotiation.
>>
>> "K. Y. Srinivasan" <kys@microsoft.com> writes:
>>
>> > From: Keith Mange <keith.mange@microsoft.com>
>> >
>> > Currently we are making decisions based on vmbus protocol versions
>> > that have been negotiated; use storage potocol versions instead.
>> >
>> > Tested-by: Alex Ng <alexng@microsoft.com>
>> > Signed-off-by: Keith Mange <keith.mange@microsoft.com>
>> > Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
>> > ---
>> > drivers/scsi/storvsc_drv.c | 109
>> +++++++++++++++++++++++++++++++++++---------
>> > 1 files changed, 87 insertions(+), 22 deletions(-)
>> >
>> > diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c
>> > index 5f9d133..f29871e 100644
>> > --- a/drivers/scsi/storvsc_drv.c
>> > +++ b/drivers/scsi/storvsc_drv.c
>> > @@ -56,14 +56,18 @@
>> > * V1 RC > 2008/1/31: 2.0
>> > * Win7: 4.2
>> > * Win8: 5.1
>> > + * Win8.1: 6.0
>> > + * Win10: 6.2
>> > */
>> >
>> > #define VMSTOR_PROTO_VERSION(MAJOR_, MINOR_) ((((MAJOR_)
>> & 0xff) << 8) | \
>> > (((MINOR_) & 0xff)))
>> >
>> > +#define VMSTOR_PROTO_VERSION_WIN6
>> VMSTOR_PROTO_VERSION(2, 0)
>> > #define VMSTOR_PROTO_VERSION_WIN7
>> VMSTOR_PROTO_VERSION(4, 2)
>> > #define VMSTOR_PROTO_VERSION_WIN8
>> VMSTOR_PROTO_VERSION(5, 1)
>> > -
>> > +#define VMSTOR_PROTO_VERSION_WIN8_1
>> VMSTOR_PROTO_VERSION(6, 0)
>> > +#define VMSTOR_PROTO_VERSION_WIN10
>> VMSTOR_PROTO_VERSION(6, 2)
>> >
>> > /* Packet structure describing virtual storage requests. */
>> > enum vstor_packet_operation {
>> > @@ -205,6 +209,46 @@ struct vmscsi_request {
>> >
>> >
>> > /*
>> > + * The list of storage protocols in order of preference.
>> > + */
>> > +struct vmstor_protocol {
>> > + int protocol_version;
>> > + int sense_buffer_size;
>> > + int vmscsi_size_delta;
>> > +};
>> > +
>> > +#define VMSTOR_NUM_PROTOCOLS 5
>>
>> can't you just use ARRAY_SIZE() here, so you don't have to touch the
>> constant every time a new protocol is appended to the list?
>
> Certainly. These patches have been floating around for more than a month now and if it is ok
> with you, I will submit a patch on top of this current series to address the concern you have raised.
> James, please let me know.
>
No objections from my side, but it's up to James to decide what and when
he picks up patches.
Thanks,
Johannes
--
Johannes Thumshirn Storage
jthumshirn@suse.de +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: Felix Imendörffer, Jane Smithard, Graham Norton
HRB 21284 (AG Nürnberg)
Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
next prev parent reply other threads:[~2015-08-14 6:46 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-13 15:43 [PATCH RESEND V2 0/7] scsi: storvsc: Some miscellaneous cleanup K. Y. Srinivasan
2015-08-13 15:43 ` [PATCH RESEND V2 1/7] scsi: storvsc: Rather than look for sets of specific protocol versions, make decisions based on ranges K. Y. Srinivasan
2015-08-13 15:43 ` [PATCH RESEND V2 2/7] scsi: storvsc: Use a single value to track protocol versions K. Y. Srinivasan
2015-08-13 15:43 ` [PATCH RESEND V2 3/7] scsi: storvsc: Untangle the storage protocol negotiation from the vmbus protocol negotiation K. Y. Srinivasan
2015-08-13 14:33 ` Johannes Thumshirn
2015-08-13 15:18 ` KY Srinivasan
2015-08-14 6:45 ` Johannes Thumshirn [this message]
2015-08-14 19:26 ` KY Srinivasan
2015-08-27 1:40 ` James Bottomley
2015-08-13 15:43 ` [PATCH RESEND V2 4/7] scsi: storvsc: use correct defaults for values determined by " K. Y. Srinivasan
2015-08-13 15:43 ` [PATCH RESEND V2 5/7] scsi: storvsc: use storage protocol version to determine storage capabilities K. Y. Srinivasan
2015-08-13 15:43 ` [PATCH RESEND V2 6/7] scsi: storvsc: Allow write_same when host is windows 10 K. Y. Srinivasan
2015-08-13 15:43 ` [PATCH RESEND V2 7/7] scsi: storvsc: Set the error code correctly in failure conditions K. Y. Srinivasan
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