From: Philipp Reisner <philipp.reisner@linbit.com>
To: Kyle Moffett <kyle@moffetthome.net>
Cc: linux-kernel@vger.kernel.org, Jens Axboe <axboe@kernel.dk>,
drbd-dev@lists.linbit.com
Subject: Re: [PATCH 09/10] drbd: Remove volume numbers from struct p_header95
Date: Tue, 27 Sep 2011 11:34:06 +0200 [thread overview]
Message-ID: <201109271134.06410.philipp.reisner@linbit.com> (raw)
In-Reply-To: <CAGZ=bq+Ef+wy8E9taBv=vZfTdvC_VBFFD=GzNqR9Em46U-wMmg@mail.gmail.com>
Am Freitag, 23. September 2011, 19:28:24 schrieb Kyle Moffett:
> Hi!
>
> On Fri, Sep 23, 2011 at 10:31, Philipp Reisner
>
> <philipp.reisner@linbit.com> wrote:
> > From: Andreas Gruenbacher <agruen@linbit.com>
> >
> > Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
> > Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
> > ---
>
> [...snip...]
>
> > diff --git a/drivers/block/drbd/drbd_main.c
> > b/drivers/block/drbd/drbd_main.c index 3310986..99b467e 100644
> > --- a/drivers/block/drbd/drbd_main.c
> > +++ b/drivers/block/drbd/drbd_main.c
> > @@ -717,11 +717,11 @@ static unsigned int prepare_header80(struct
> > p_header80 *h, enum drbd_packet cmd, return sizeof(struct p_header80);
> > }
> >
> > -static unsigned int prepare_header95(struct p_header95 *h, enum
> > drbd_packet cmd, int size, int vnr) +static unsigned int
> > prepare_header95(struct p_header95 *h, enum drbd_packet cmd, int size) {
> > h->magic = cpu_to_be16(DRBD_MAGIC_BIG);
> > h->command = cpu_to_be16(cmd);
> > - h->vol_n_len = cpu_to_be32(vnr << 24 | size);
> > + h->length = cpu_to_be32(size);
> > return sizeof(struct p_header95);
> > }
>
> This patch needs a commit message indicating why it does not break
> compatibility. If you are guaranteed that the "vnr" passed into
> prepare_header95 is always zero, then you should indicate why that is
> true.
>
Here is the commit message for that one. The alternative is to merge
that to patch 'drbd: Use new header layout, and send volume IOs'.
( Which is patch number 236, i.e. outside of this (10th) posting of
DRBD-8.4 patches. It was posted on August 25.
See https://lkml.org/lkml/2011/8/25/322 )
Author: Andreas Gruenbacher <agruen@linbit.com>
Date: Tue Mar 22 13:17:47 2011 +0100
drbd: Remove volume numbers from struct p_header95
Remove the temporal 8 bit volume number form header 95. All connections
that support multiple volumes are new using protocol 100 with header 100.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Best,
Phil
--
: Dipl-Ing Philipp Reisner
: LINBIT | Your Way to High Availability
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next prev parent reply other threads:[~2011-09-27 9:34 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-23 14:31 [RFC 00/10] drbd: part 10 of adding multiple volume support to drbd Philipp Reisner
2011-09-23 14:31 ` [PATCH 01/10] drbd: drbd_send_ping(), drbd_send_ping(): Return 0 upon success and an error code otherwise Philipp Reisner
2011-09-23 14:31 ` [PATCH 02/10] drbd: Introduce new primitives for sending commands Philipp Reisner
2011-09-23 14:31 ` [PATCH 03/10] drbd: Introduce drbd_header_size() Philipp Reisner
2011-09-23 14:31 ` [PATCH 04/10] drbd: Replace and remove old primitives Philipp Reisner
2011-09-23 17:33 ` Kyle Moffett
2011-09-27 9:34 ` Philipp Reisner
2011-09-23 14:31 ` [PATCH 05/10] drbd: Remove now-unused int_dig_out buffer Philipp Reisner
2011-09-23 14:31 ` [PATCH 06/10] drbd: Remove some fixed header size assumptions Philipp Reisner
2011-09-23 14:31 ` [PATCH 07/10] drbd: Remove headers from on-the-wire data structures (struct p_*) Philipp Reisner
2011-09-23 17:38 ` Kyle Moffett
2011-09-27 9:34 ` Philipp Reisner
2011-09-23 14:31 ` [PATCH 08/10] drbd: Introduce protocol version 100 headers Philipp Reisner
2011-09-23 17:42 ` Kyle Moffett
2011-09-27 9:34 ` Philipp Reisner
2011-09-23 14:31 ` [PATCH 09/10] drbd: Remove volume numbers from struct p_header95 Philipp Reisner
2011-09-23 17:28 ` Kyle Moffett
2011-09-27 9:34 ` Philipp Reisner [this message]
2011-09-28 4:26 ` Kyle Moffett
2011-09-28 9:20 ` Philipp Reisner
2011-09-28 9:21 ` [PATCH 9/9] drbd: Removed outdated comments and code that envisioned VNRs in header 95 Philipp Reisner
2011-09-23 14:31 ` [PATCH 10/10] drbd: For protocol versions before 100, use mixed header versions Philipp Reisner
2011-09-23 17:24 ` Kyle Moffett
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