All of lore.kernel.org
 help / color / mirror / Atom feed
From: "hch@infradead.org" <hch@infradead.org>
To: Hannes Reinecke <hare@suse.de>
Cc: "hch@infradead.org" <hch@infradead.org>,
	Mike Snitzer <snitzer@redhat.com>, "jack@suse.cz" <jack@suse.cz>,
	"gustavo@embeddedor.com" <gustavo@embeddedor.com>,
	"linux-mm@kvack.org" <linux-mm@kvack.org>,
	device-mapper development <dm-devel@redhat.com>,
	"pavel@ucw.cz" <pavel@ucw.cz>, "steve@sk2.org" <steve@sk2.org>,
	"osandov@fb.com" <osandov@fb.com>,
	Alasdair G Kergon <agk@redhat.com>,
	"bvanassche@acm.org" <bvanassche@acm.org>,
	"Darrick J. Wong" <darrick.wong@oracle.com>,
	"len.brown@intel.com" <len.brown@intel.com>,
	"linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>,
	"ming.lei@redhat.com" <ming.lei@redhat.com>,
	"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
	"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
	"viro@zeniv.linux.org.uk" <viro@zeniv.linux.org.uk>,
	Sergei Shtepa <sergei.shtepa@veeam.com>,
	"koct9i@gmail.com" <koct9i@gmail.com>,
	"axboe@kernel.dk" <axboe@kernel.dk>,
	Damien Le Moal <Damien.LeMoal@wdc.com>,
	Johannes Thumshirn <Johannes.Thumshirn@wdc.com>,
	"rjw@rjwysocki.net" <rjw@rjwysocki.net>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-xfs@vger.kernel.org" <linux-xfs@vger.kernel.org>,
	"tj@kernel.org" <tj@kernel.org>,
	"akpm@linux-foundation.org" <akpm@linux-foundation.org>
Subject: Re: [dm-devel] [PATCH 0/2] block layer filter and block device snapshot module
Date: Fri, 23 Oct 2020 12:12:53 +0100	[thread overview]
Message-ID: <20201023111253.GA22468@infradead.org> (raw)
In-Reply-To: <d50062cd-929d-c8ff-5851-4e1d517dc4cb@suse.de>

On Fri, Oct 23, 2020 at 12:31:05PM +0200, Hannes Reinecke wrote:
> My thoughts went more into the direction of hooking into ->submit_bio,
> seeing that it's a NULL pointer for most (all?) block drivers.
> 
> But sure, I'll check how the interposer approach would turn out.

submit_bio is owned by the underlying device, and for a good reason
stored in a const struct..

WARNING: multiple messages have this Message-ID (diff)
From: "hch@infradead.org" <hch@infradead.org>
To: Hannes Reinecke <hare@suse.de>
Cc: "jack@suse.cz" <jack@suse.cz>, Mike Snitzer <snitzer@redhat.com>,
	"gustavo@embeddedor.com" <gustavo@embeddedor.com>,
	"linux-mm@kvack.org" <linux-mm@kvack.org>,
	device-mapper development <dm-devel@redhat.com>,
	"pavel@ucw.cz" <pavel@ucw.cz>, "steve@sk2.org" <steve@sk2.org>,
	"osandov@fb.com" <osandov@fb.com>,
	Alasdair G Kergon <agk@redhat.com>,
	"bvanassche@acm.org" <bvanassche@acm.org>,
	"Darrick J. Wong" <darrick.wong@oracle.com>,
	"hch@infradead.org" <hch@infradead.org>,
	"len.brown@intel.com" <len.brown@intel.com>,
	"linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>,
	"ming.lei@redhat.com" <ming.lei@redhat.com>,
	"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
	"tj@kernel.org" <tj@kernel.org>,
	"viro@zeniv.linux.org.uk" <viro@zeniv.linux.org.uk>,
	Sergei Shtepa <sergei.shtepa@veeam.com>,
	"koct9i@gmail.com" <koct9i@gmail.com>,
	"axboe@kernel.dk" <axboe@kernel.dk>,
	Damien Le Moal <Damien.LeMoal@wdc.com>,
	Johannes Thumshirn <Johannes.Thumshirn@wdc.com>,
	"rjw@rjwysocki.net" <rjw@rjwysocki.net>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-xfs@vger.kernel.org" <linux-xfs@vger.kernel.org>,
	"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
	"akpm@linux-foundation.org" <akpm@linux-foundation.org>
Subject: Re: [dm-devel] [PATCH 0/2] block layer filter and block device snapshot module
Date: Fri, 23 Oct 2020 12:12:53 +0100	[thread overview]
Message-ID: <20201023111253.GA22468@infradead.org> (raw)
In-Reply-To: <d50062cd-929d-c8ff-5851-4e1d517dc4cb@suse.de>

On Fri, Oct 23, 2020 at 12:31:05PM +0200, Hannes Reinecke wrote:
> My thoughts went more into the direction of hooking into ->submit_bio,
> seeing that it's a NULL pointer for most (all?) block drivers.
> 
> But sure, I'll check how the interposer approach would turn out.

submit_bio is owned by the underlying device, and for a good reason
stored in a const struct..

--
dm-devel mailing list
dm-devel@redhat.com
https://www.redhat.com/mailman/listinfo/dm-devel


  parent reply	other threads:[~2020-10-23 11:13 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-21  9:04 [PATCH 0/2] block layer filter and block device snapshot module Sergei Shtepa
2020-10-21  9:04 ` [PATCH 1/2] Block layer filter - second version Sergei Shtepa
2020-10-21  9:14   ` Johannes Thumshirn
2020-10-21 10:01     ` Sergei Shtepa
2020-10-21  9:21   ` Damien Le Moal
2020-10-21 10:27     ` Sergei Shtepa
2020-10-21 11:44     ` Matthew Wilcox
2020-10-21 12:55       ` Sergei Shtepa
2020-10-21 13:07         ` Matthew Wilcox
2020-10-21 14:35           ` Sergei Shtepa
2020-10-21 15:09   ` Randy Dunlap
2020-10-24 14:53   ` Greg KH
2020-10-21  9:04 ` [PATCH 2/2] blk-snap - snapshots and change-tracking for block devices Sergei Shtepa
2020-10-21  9:08   ` Pavel Machek
2020-10-21  9:37     ` Sergei Shtepa
2020-10-21  9:23   ` Damien Le Moal
2020-10-21 11:15     ` Sergei Shtepa
2020-10-21 10:48   ` kernel test robot
2020-10-21 10:48     ` kernel test robot
2020-10-21 15:11   ` Randy Dunlap
2020-10-21 13:31 ` [PATCH 0/2] block layer filter and block device snapshot module Hannes Reinecke
2020-10-21 14:10   ` Sergei Shtepa
2020-10-22  5:58     ` Hannes Reinecke
2020-10-22  9:44       ` Sergei Shtepa
2020-10-22 10:28         ` Damien Le Moal
2020-10-22 13:52           ` Sergei Shtepa
2020-10-22 15:14             ` Darrick J. Wong
2020-10-22 17:54               ` Mike Snitzer
2020-10-22 17:54                 ` [dm-devel] " Mike Snitzer
2020-10-22 17:54                 ` Mike Snitzer
2020-10-23  9:13                 ` hch
2020-10-23  9:13                   ` [dm-devel] " hch
2020-10-23 10:31                   ` Hannes Reinecke
2020-10-23 10:31                     ` [dm-devel] " Hannes Reinecke
2020-10-23 11:04                     ` Sergei Shtepa
2020-10-23 11:04                       ` [dm-devel] " Sergei Shtepa
2020-10-23 11:12                     ` hch [this message]
2020-10-23 11:12                       ` hch
2020-10-22 18:35 ` Mike Snitzer
2020-10-22 18:35   ` [dm-devel] " Mike Snitzer
2020-10-22 18:35   ` Mike Snitzer

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20201023111253.GA22468@infradead.org \
    --to=hch@infradead.org \
    --cc=Damien.LeMoal@wdc.com \
    --cc=Johannes.Thumshirn@wdc.com \
    --cc=agk@redhat.com \
    --cc=akpm@linux-foundation.org \
    --cc=axboe@kernel.dk \
    --cc=bvanassche@acm.org \
    --cc=darrick.wong@oracle.com \
    --cc=dm-devel@redhat.com \
    --cc=gustavo@embeddedor.com \
    --cc=hare@suse.de \
    --cc=jack@suse.cz \
    --cc=koct9i@gmail.com \
    --cc=len.brown@intel.com \
    --cc=linux-block@vger.kernel.org \
    --cc=linux-fsdevel@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=linux-pm@vger.kernel.org \
    --cc=linux-xfs@vger.kernel.org \
    --cc=ming.lei@redhat.com \
    --cc=osandov@fb.com \
    --cc=pavel@ucw.cz \
    --cc=rjw@rjwysocki.net \
    --cc=sergei.shtepa@veeam.com \
    --cc=snitzer@redhat.com \
    --cc=steve@sk2.org \
    --cc=tj@kernel.org \
    --cc=viro@zeniv.linux.org.uk \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.