LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Juergen Gross <jgross@suse.com>
To: Stanislav Kinsburskii <staskins@amazon.com>
Cc: jakub.kicinski@netronome.com, hpa@zytor.com, mcroce@redhat.com,
	tglx@linutronix.de, ggarcia@abra.uab.cat, daniel@iogearbox.net,
	x86@kernel.org, mingo@redhat.com, xen-devel@lists.xenproject.org,
	axboe@kernel.dk, konrad.wilk@oracle.com, amir.jer.levy@intel.com,
	paul.durrant@citrix.com, stefanha@redhat.com,
	dsa@cumulusnetworks.com, boris.ostrovsky@oracle.com,
	linux-block@vger.kernel.org, wei.liu2@citrix.com,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	davem@davemloft.net, dwmw@amazon.co.uk, roger.pau@citrix.com
Subject: Re: [PATCH 1/3] xen: add generic fault injection facility
Date: Fri, 20 Apr 2018 12:59:17 +0200	[thread overview]
Message-ID: <03a333dc-e505-e254-f39d-e68b1453a6f3@suse.com> (raw)
In-Reply-To: <20180420104726.17823.40147.stgit@dev-dsk-staskins-1a-ca5afbf2.eu-west-1.amazon.com>

On 20/04/18 12:47, Stanislav Kinsburskii wrote:
> The overall idea of this patch is to add a generic fault injection facility
> to Xen, which later can be used in various places by different Xen parts.
> 
> Core implementation ideas:
> 
> - The facility build is controlled by boolean config
>   CONFIG_XEN_FAULT_INJECTION option ("N" by default).
> 
> - All fault injection logic is located in an optionally compiled separated
>   file.
> 
> - Fault injection attribute and control directory creation and destruction
>   are wrapped with helpers, producing and accepting a pointer to an opaque
>   object thus making all the rest of code independent on fault injection
>   engine.
> 
> When enabled Xen root fault injection directory appears:
> 
> - /sys/kernel/debug/xen/fault_inject/
> 
> The falicity provides the following helpers (exported to be accessible in
> modules):
> 
> - xen_fi_add(name) - adds fault injection control directory "name" to Xen
>   root fault injection directory
> 
> - xen_fi_dir_create(name) - allows to create a subdirectory "name" in Xen
>   root fault injection directory.
> 
> - xen_fi_dir_add(dir, name) - adds fault injection control directory "name"
>   to directory "dir"
> 
> - xen_should_fail(fi) - check whether fi hav to fail.
> 
> Signed-off-by: Stanislav Kinsburskii <staskins@amazon.com>
> CC: Boris Ostrovsky <boris.ostrovsky@oracle.com>
> CC: Juergen Gross <jgross@suse.com>
> CC: Thomas Gleixner <tglx@linutronix.de>
> CC: Ingo Molnar <mingo@redhat.com>
> CC: "H. Peter Anvin" <hpa@zytor.com>
> CC: x86@kernel.org
> CC: xen-devel@lists.xenproject.org
> CC: linux-kernel@vger.kernel.org
> CC: Stanislav Kinsburskii <staskins@amazon.com>
> CC: David Woodhouse <dwmw@amazon.co.uk>
> ---
>  arch/x86/xen/Kconfig        |    7 +++
>  arch/x86/xen/Makefile       |    1 
>  arch/x86/xen/fault_inject.c |  109 +++++++++++++++++++++++++++++++++++++++++++
>  include/xen/fault_inject.h  |   45 ++++++++++++++++++
>  4 files changed, 162 insertions(+)
>  create mode 100644 arch/x86/xen/fault_inject.c
>  create mode 100644 include/xen/fault_inject.h
> 
> diff --git a/arch/x86/xen/Kconfig b/arch/x86/xen/Kconfig
> index c1f98f3..483fc16 100644
> --- a/arch/x86/xen/Kconfig
> +++ b/arch/x86/xen/Kconfig
> @@ -77,3 +77,10 @@ config XEN_PVH
>  	bool "Support for running as a PVH guest"
>  	depends on XEN && XEN_PVHVM && ACPI
>  	def_bool n
> +
> +config XEN_FAULT_INJECTION
> +	bool "Enable Xen fault injection"
> +	depends on FAULT_INJECTION_DEBUG_FS
> +	default n
> +	help
> +	  Enable Xen fault injection facility

Why for x86 only? I'd rather add this under drivers/xen

> diff --git a/arch/x86/xen/Makefile b/arch/x86/xen/Makefile
> index d83cb54..3158fe1 100644
> --- a/arch/x86/xen/Makefile
> +++ b/arch/x86/xen/Makefile
> @@ -34,3 +34,4 @@ obj-$(CONFIG_XEN_DOM0)		+= vga.o
>  obj-$(CONFIG_SWIOTLB_XEN)	+= pci-swiotlb-xen.o
>  obj-$(CONFIG_XEN_EFI)		+= efi.o
>  obj-$(CONFIG_XEN_PVH)	 	+= xen-pvh.o
> +obj-$(CONFIG_XEN_FAULT_INJECTION)	+= fault_inject.o
> diff --git a/arch/x86/xen/fault_inject.c b/arch/x86/xen/fault_inject.c
> new file mode 100644
> index 0000000..ecf0f7c
> --- /dev/null
> +++ b/arch/x86/xen/fault_inject.c
> @@ -0,0 +1,109 @@
> +/*
> + * Fauit injection interface for Xen virtual block devices
> + *
> + * Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License version 2
> + * as published by the Free Software Foundation; or, when distributed
> + * separately from the Linux kernel or incorporated into other
> + * software packages, subject to the following license:

Please use the appropriate SPDX header instead of the full GPL2
boilerplate.


Juergen

  reply	other threads:[~2018-04-20 10:59 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-20 10:47 [PATCH 0/3] Introduce Xen " Stanislav Kinsburskii
2018-04-20 10:47 ` [PATCH 1/3] xen: add generic " Stanislav Kinsburskii
2018-04-20 10:59   ` Juergen Gross [this message]
2018-04-20 12:45     ` staskins
2018-04-20 10:47 ` [PATCH 2/3] xen netback: add " Stanislav Kinsburskii
2018-04-20 11:25   ` Juergen Gross
2018-04-20 12:52     ` staskins
2018-04-20 13:00       ` Juergen Gross
2018-04-20 13:02         ` staskins
2018-04-23  9:58   ` Wei Liu
2018-04-20 10:47 ` [PATCH 3/3] xen blkback: " Stanislav Kinsburskii
2018-04-20 11:28   ` Juergen Gross
2018-04-20 12:53     ` staskins
2018-04-22 15:41   ` kbuild test robot

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=03a333dc-e505-e254-f39d-e68b1453a6f3@suse.com \
    --to=jgross@suse.com \
    --cc=amir.jer.levy@intel.com \
    --cc=axboe@kernel.dk \
    --cc=boris.ostrovsky@oracle.com \
    --cc=daniel@iogearbox.net \
    --cc=davem@davemloft.net \
    --cc=dsa@cumulusnetworks.com \
    --cc=dwmw@amazon.co.uk \
    --cc=ggarcia@abra.uab.cat \
    --cc=hpa@zytor.com \
    --cc=jakub.kicinski@netronome.com \
    --cc=konrad.wilk@oracle.com \
    --cc=linux-block@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mcroce@redhat.com \
    --cc=mingo@redhat.com \
    --cc=netdev@vger.kernel.org \
    --cc=paul.durrant@citrix.com \
    --cc=roger.pau@citrix.com \
    --cc=staskins@amazon.com \
    --cc=stefanha@redhat.com \
    --cc=tglx@linutronix.de \
    --cc=wei.liu2@citrix.com \
    --cc=x86@kernel.org \
    --cc=xen-devel@lists.xenproject.org \
    --subject='Re: [PATCH 1/3] xen: add generic fault injection facility' \
    /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

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).