Re: [PATCH v2] docs: Move fault injection section to dev-tools

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On 9/2/24 07:53, Breno Leitao wrote:

> Fault injection is a development tool, and should be under dev-tools


Nit: not "and should be under" but "hence move under"


> section.
>
> Suggested-by: Jonathan Corbet <corbet@xxxxxxx>
> Signed-off-by: Breno Leitao <leitao@xxxxxxxxxx>
> ---
> Changelog:
>
> v2:
>   * Fixed a remaining file pointing to the wrong file, as reported by
>     kernel test robot:
> 	* https://lore.kernel.org/all/202408312350.DEf53QzI-lkp@xxxxxxxxx/ 
>
> v1:
>   * https://lore.kernel.org/all/20240830174502.3732959-1-leitao@xxxxxxxxxx/
>
>  Documentation/admin-guide/kernel-parameters.txt              | 2 +-
>  .../{ => dev-tools}/fault-injection/fault-injection.rst      | 0
>  Documentation/{ => dev-tools}/fault-injection/index.rst      | 0
>  .../fault-injection/notifier-error-inject.rst                | 0
>  .../{ => dev-tools}/fault-injection/nvme-fault-injection.rst | 0
>  .../{ => dev-tools}/fault-injection/provoke-crashes.rst      | 0
>  Documentation/dev-tools/index.rst                            | 1 +
>  Documentation/index.rst                                      | 1 -
>  Documentation/process/4.Coding.rst                           | 2 +-
>  Documentation/process/submit-checklist.rst                   | 2 +-
>  Documentation/translations/it_IT/process/4.Coding.rst        | 2 +-
>  .../translations/it_IT/process/submit-checklist.rst          | 2 +-
>  Documentation/translations/ja_JP/SubmitChecklist             | 2 +-
>  .../translations/sp_SP/process/submit-checklist.rst          | 2 +-
>  Documentation/translations/zh_CN/index.rst                   | 2 +-
>  Documentation/translations/zh_CN/process/4.Coding.rst        | 2 +-
>  .../translations/zh_CN/process/submit-checklist.rst          | 2 +-
>  Documentation/translations/zh_TW/index.rst                   | 2 +-
>  Documentation/translations/zh_TW/process/4.Coding.rst        | 2 +-
>  .../translations/zh_TW/process/submit-checklist.rst          | 2 +-
>  MAINTAINERS                                                  | 2 +-
>  drivers/block/null_blk/main.c                                | 2 +-
>  drivers/misc/lkdtm/core.c                                    | 2 +-
>  drivers/ufs/core/ufs-fault-injection.c                       | 2 +-
>  include/asm-generic/error-injection.h                        | 5 +++--
>  include/linux/fault-inject.h                                 | 2 +-
>  lib/Kconfig.debug                                            | 4 ++--
>  tools/testing/fault-injection/failcmd.sh                     | 2 +-
>  28 files changed, 25 insertions(+), 24 deletions(-)
>  rename Documentation/{ => dev-tools}/fault-injection/fault-injection.rst (100%)
>  rename Documentation/{ => dev-tools}/fault-injection/index.rst (100%)
>  rename Documentation/{ => dev-tools}/fault-injection/notifier-error-inject.rst (100%)
>  rename Documentation/{ => dev-tools}/fault-injection/nvme-fault-injection.rst (100%)
>  rename Documentation/{ => dev-tools}/fault-injection/provoke-crashes.rst (100%)
>
> diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
> index 09126bb8cc9f..70d2077c9b3f 100644
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -1532,7 +1532,7 @@
>  	fail_make_request=[KNL]
>  			General fault injection mechanism.
>  			Format: <interval>,<probability>,<space>,<times>
> -			See also Documentation/fault-injection/.
> +			See also Documentation/dev-tools/fault-injection/.
>  
>  	fb_tunnels=	[NET]
>  			Format: { initns | none }
> diff --git a/Documentation/fault-injection/fault-injection.rst b/Documentation/dev-tools/fault-injection/fault-injection.rst
> similarity index 100%
> rename from Documentation/fault-injection/fault-injection.rst
> rename to Documentation/dev-tools/fault-injection/fault-injection.rst
> diff --git a/Documentation/fault-injection/index.rst b/Documentation/dev-tools/fault-injection/index.rst
> similarity index 100%
> rename from Documentation/fault-injection/index.rst
> rename to Documentation/dev-tools/fault-injection/index.rst
> diff --git a/Documentation/fault-injection/notifier-error-inject.rst b/Documentation/dev-tools/fault-injection/notifier-error-inject.rst
> similarity index 100%
> rename from Documentation/fault-injection/notifier-error-inject.rst
> rename to Documentation/dev-tools/fault-injection/notifier-error-inject.rst
> diff --git a/Documentation/fault-injection/nvme-fault-injection.rst b/Documentation/dev-tools/fault-injection/nvme-fault-injection.rst
> similarity index 100%
> rename from Documentation/fault-injection/nvme-fault-injection.rst
> rename to Documentation/dev-tools/fault-injection/nvme-fault-injection.rst
> diff --git a/Documentation/fault-injection/provoke-crashes.rst b/Documentation/dev-tools/fault-injection/provoke-crashes.rst
> similarity index 100%
> rename from Documentation/fault-injection/provoke-crashes.rst
> rename to Documentation/dev-tools/fault-injection/provoke-crashes.rst
> diff --git a/Documentation/dev-tools/index.rst b/Documentation/dev-tools/index.rst
> index 53d4d124f9c5..ade850c4b344 100644
> --- a/Documentation/dev-tools/index.rst
> +++ b/Documentation/dev-tools/index.rst
> @@ -34,6 +34,7 @@ Documentation/dev-tools/testing-overview.rst
>     ktap
>     checkuapi
>     gpio-sloppy-logic-analyzer
> +   Fault injection <fault-injection/index>
>  
>  
>  .. only::  subproject and html
> diff --git a/Documentation/index.rst b/Documentation/index.rst
> index f9f525f4c0dd..9b57d6bc04f4 100644
> --- a/Documentation/index.rst
> +++ b/Documentation/index.rst
> @@ -57,7 +57,6 @@ Various other manuals with useful information for all kernel developers.
>     Testing guide <dev-tools/testing-overview>
>     Hacking guide <kernel-hacking/index>
>     Tracing <trace/index>
> -   Fault injection <fault-injection/index>
>     Livepatching <livepatch/index>
>     Rust <rust/index>
>  
> diff --git a/Documentation/process/4.Coding.rst b/Documentation/process/4.Coding.rst
> index 80bcc1cabc23..1fc0a7fc2f43 100644
> --- a/Documentation/process/4.Coding.rst
> +++ b/Documentation/process/4.Coding.rst
> @@ -300,7 +300,7 @@ enabled, a configurable percentage of memory allocations will be made to
>  fail; these failures can be restricted to a specific range of code.
>  Running with fault injection enabled allows the programmer to see how the
>  code responds when things go badly.  See
> -Documentation/fault-injection/fault-injection.rst for more information on
> +Documentation/dev-tools/fault-injection/fault-injection.rst for more information on
>  how to use this facility.
>  
>  Other kinds of errors can be found with the "sparse" static analysis tool.
> diff --git a/Documentation/process/submit-checklist.rst b/Documentation/process/submit-checklist.rst
> index e531dd504b6c..b513b3d05426 100644
> --- a/Documentation/process/submit-checklist.rst
> +++ b/Documentation/process/submit-checklist.rst
> @@ -124,7 +124,7 @@ Test your code
>  3) All codepaths have been exercised with all lockdep features enabled.
>  
>  4) Has been checked with injection of at least slab and page-allocation
> -   failures.  See ``Documentation/fault-injection/``.
> +   failures.  See ``Documentation/dev-tools/fault-injection/``.
>     If the new code is substantial, addition of subsystem-specific fault
>     injection might be appropriate.
>  
> diff --git a/Documentation/translations/it_IT/process/4.Coding.rst b/Documentation/translations/it_IT/process/4.Coding.rst
> index ec874a8dfb9d..b7b9ab6df103 100644
> --- a/Documentation/translations/it_IT/process/4.Coding.rst
> +++ b/Documentation/translations/it_IT/process/4.Coding.rst
> @@ -317,7 +317,7 @@ di allocazione di memoria sarà destinata al fallimento; questi fallimenti
>  possono essere ridotti ad uno specifico pezzo di codice.  Procedere con
>  l'inserimento dei fallimenti attivo permette al programmatore di verificare
>  come il codice risponde quando le cose vanno male.  Consultate:
> -Documentation/fault-injection/fault-injection.rst per avere maggiori
> +Documentation/dev-tools/fault-injection/fault-injection.rst per avere maggiori
>  informazioni su come utilizzare questo strumento.
>  
>  Altre tipologie di errori possono essere riscontrati con lo strumento di
> diff --git a/Documentation/translations/it_IT/process/submit-checklist.rst b/Documentation/translations/it_IT/process/submit-checklist.rst
> index 2fc09cc1f0be..60ec660702fa 100644
> --- a/Documentation/translations/it_IT/process/submit-checklist.rst
> +++ b/Documentation/translations/it_IT/process/submit-checklist.rst
> @@ -99,7 +99,7 @@ sottomissione delle patch, in particolare
>      essere inviate in copia anche a linux-api@xxxxxxxxxxxxxxx.
>  
>  20) La patch è stata verificata con l'iniezione di fallimenti in slab e
> -    nell'allocazione di pagine.  Vedere ``Documentation/fault-injection/``.
> +    nell'allocazione di pagine.  Vedere ``Documentation/dev-tools/fault-injection/``.
>  
>      Se il nuovo codice è corposo, potrebbe essere opportuno aggiungere
>      l'iniezione di fallimenti specifici per il sottosistema.
> diff --git a/Documentation/translations/ja_JP/SubmitChecklist b/Documentation/translations/ja_JP/SubmitChecklist
> index 1759c6b452d6..193641581e98 100644
> --- a/Documentation/translations/ja_JP/SubmitChecklist
> +++ b/Documentation/translations/ja_JP/SubmitChecklist
> @@ -90,7 +90,7 @@ Linux カーネルパッチ投稿者向けチェックリスト
>  
>  19: 少なくともslabアロケーションとpageアロケーションに失敗した場合の
>      挙動について、fault-injectionを利用して確認してください。
> -    Documentation/fault-injection/ を参照してください。
> +    Documentation/dev-tools/fault-injection/ を参照してください。
>  
>      追加したコードがかなりの量であったならば、サブシステム特有の
>      fault-injectionを追加したほうが良いかもしれません。
> diff --git a/Documentation/translations/sp_SP/process/submit-checklist.rst b/Documentation/translations/sp_SP/process/submit-checklist.rst
> index 0d6651f9d871..d2b09a10c1fe 100644
> --- a/Documentation/translations/sp_SP/process/submit-checklist.rst
> +++ b/Documentation/translations/sp_SP/process/submit-checklist.rst
> @@ -102,7 +102,7 @@ y en otros lugares con respecto al envío de parches del kernel de Linux.
>      espacio de usuario deben ser CCed a linux-api@xxxxxxxxxxxxxxx.
>  
>  19) Se ha comprobado con la inyección de al menos errores de asignación
> -    de slab y página. Consulte ``Documentation/fault-injection/``.
> +    de slab y página. Consulte ``Documentation/dev-tools/fault-injection/``.
>  
>      Si el nuevo código es sustancial, la adición de la inyección de
>      errores específica del subsistema podría ser apropiada.
> diff --git a/Documentation/translations/zh_CN/index.rst b/Documentation/translations/zh_CN/index.rst
> index 20b9d4270d1f..e471f22a5473 100644
> --- a/Documentation/translations/zh_CN/index.rst
> +++ b/Documentation/translations/zh_CN/index.rst
> @@ -73,7 +73,7 @@
>  TODOList:
>  
>  * trace/index
> -* fault-injection/index
> +* dev-tools/fault-injection/index
>  * livepatch/index
>  
>  面向用户的文档
> diff --git a/Documentation/translations/zh_CN/process/4.Coding.rst b/Documentation/translations/zh_CN/process/4.Coding.rst
> index 4cc35d410dbc..2794761a1cbe 100644
> --- a/Documentation/translations/zh_CN/process/4.Coding.rst
> +++ b/Documentation/translations/zh_CN/process/4.Coding.rst
> @@ -208,7 +208,7 @@ Linus对这个问题给出了最佳答案:
>  启用故障注入后,内存分配的可配置失败的百分比;这些失败可以限定在特定的代码
>  范围内。在启用了故障注入的情况下运行,程序员可以看到当情况恶化时代码如何响
>  应。有关如何使用此工具的详细信息,请参阅
> -Documentation/fault-injection/fault-injection.rst。
> +Documentation/dev-tools/fault-injection/fault-injection.rst。
>  
>  “sparse”静态分析工具可以发现其他类型的错误。sparse可以警告程序员用户空间
>  和内核空间地址之间的混淆、大端序与小端序的混淆、在需要一组位标志的地方传递
> diff --git a/Documentation/translations/zh_CN/process/submit-checklist.rst b/Documentation/translations/zh_CN/process/submit-checklist.rst
> index 10536b74aeec..4f8d7480673d 100644
> --- a/Documentation/translations/zh_CN/process/submit-checklist.rst
> +++ b/Documentation/translations/zh_CN/process/submit-checklist.rst
> @@ -85,7 +85,7 @@ Linux内核补丁提交检查单
>      请参阅 ``Documentation/ABI/README`` 。更改用户空间接口的补丁应该抄送
>      linux-api@xxxxxxxxxxxxxxx。
>  
> -19) 已通过至少注入slab和page分配失败进行检查。请参阅 ``Documentation/fault-injection/`` 。
> +19) 已通过至少注入slab和page分配失败进行检查。请参阅 ``Documentation/dev-tools/fault-injection/`` 。
>      如果新代码是实质性的,那么添加子系统特定的故障注入可能是合适的。
>  
>  20) 新添加的代码已经用 ``gcc -W`` 编译(使用 ``make EXTRA-CFLAGS=-W`` )。这
> diff --git a/Documentation/translations/zh_TW/index.rst b/Documentation/translations/zh_TW/index.rst
> index 660a74d2023c..1932a5f28069 100644
> --- a/Documentation/translations/zh_TW/index.rst
> +++ b/Documentation/translations/zh_TW/index.rst
> @@ -64,7 +64,7 @@ TODOList:
>  * kernel-hacking/index
>  * rust/index
>  * trace/index
> -* fault-injection/index
> +* dev-tools/fault-injection/index
>  * livepatch/index
>  
>  面向用戶的文檔
> diff --git a/Documentation/translations/zh_TW/process/4.Coding.rst b/Documentation/translations/zh_TW/process/4.Coding.rst
> index e90a6b51fb98..3841da1e6729 100644
> --- a/Documentation/translations/zh_TW/process/4.Coding.rst
> +++ b/Documentation/translations/zh_TW/process/4.Coding.rst
> @@ -211,7 +211,7 @@ Linus對這個問題給出了最佳答案:
>  啓用故障注入後,內存分配的可配置失敗的百分比;這些失敗可以限定在特定的代碼
>  範圍內。在啓用了故障注入的情況下運行,程序員可以看到當情況惡化時代碼如何響
>  應。有關如何使用此工具的詳細信息,請參閱
> -Documentation/fault-injection/fault-injection.rst。
> +Documentation/dev-tools/fault-injection/fault-injection.rst。
>  
>  “sparse”靜態分析工具可以發現其他類型的錯誤。sparse可以警告程序員用戶空間
>  和內核空間地址之間的混淆、大端序與小端序的混淆、在需要一組位標誌的地方傳遞
> diff --git a/Documentation/translations/zh_TW/process/submit-checklist.rst b/Documentation/translations/zh_TW/process/submit-checklist.rst
> index 0ecb187753e4..e7a6c3332017 100644
> --- a/Documentation/translations/zh_TW/process/submit-checklist.rst
> +++ b/Documentation/translations/zh_TW/process/submit-checklist.rst
> @@ -88,7 +88,7 @@ Linux內核補丁提交檢查單
>      請參閱 ``Documentation/ABI/README`` 。更改用戶空間接口的補丁應該抄送
>      linux-api@xxxxxxxxxxxxxxx。
>  
> -19) 已通過至少注入slab和page分配失敗進行檢查。請參閱 ``Documentation/fault-injection/`` 。
> +19) 已通過至少注入slab和page分配失敗進行檢查。請參閱 ``Documentation/dev-tools/fault-injection/`` 。
>      如果新代碼是實質性的,那麼添加子系統特定的故障注入可能是合適的。
>  
>  20) 新添加的代碼已經用 ``gcc -W`` 編譯(使用 ``make EXTRA-CFLAGS=-W`` )。這
> diff --git a/MAINTAINERS b/MAINTAINERS
> index e4fa9010fcb6..b5fd319b8786 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -8537,7 +8537,7 @@ F:	drivers/net/wan/farsync.*
>  FAULT INJECTION SUPPORT
>  M:	Akinobu Mita <akinobu.mita@xxxxxxxxx>
>  S:	Supported
> -F:	Documentation/fault-injection/
> +F:	Documentation/dev-tools/fault-injection/
>  F:	lib/fault-inject.c
>  
>  FBTFT Framebuffer drivers
> diff --git a/drivers/block/null_blk/main.c b/drivers/block/null_blk/main.c
> index 2f0431e42c49..2266c80649a2 100644
> --- a/drivers/block/null_blk/main.c
> +++ b/drivers/block/null_blk/main.c
> @@ -100,7 +100,7 @@ MODULE_PARM_DESC(home_node, "Home node for the device");
>  #ifdef CONFIG_BLK_DEV_NULL_BLK_FAULT_INJECTION
>  /*
>   * For more details about fault injection, please refer to
> - * Documentation/fault-injection/fault-injection.rst.
> + * Documentation/dev-tools/fault-injection/fault-injection.rst.
>   */
>  static char g_timeout_str[80];
>  module_param_string(timeout, g_timeout_str, sizeof(g_timeout_str), 0444);
> diff --git a/drivers/misc/lkdtm/core.c b/drivers/misc/lkdtm/core.c
> index 5732fd59a227..029592f2d07e 100644
> --- a/drivers/misc/lkdtm/core.c
> +++ b/drivers/misc/lkdtm/core.c
> @@ -15,7 +15,7 @@
>   *
>   * Debugfs support added by Simon Kagstrom <simon.kagstrom@xxxxxxxxxxxxxx>
>   *
> - * See Documentation/fault-injection/provoke-crashes.rst for instructions
> + * See Documentation/dev-tools/fault-injection/provoke-crashes.rst for instructions
>   */
>  #include "lkdtm.h"
>  #include <linux/fs.h>
> diff --git a/drivers/ufs/core/ufs-fault-injection.c b/drivers/ufs/core/ufs-fault-injection.c
> index 169540417079..3afe1e7fb407 100644
> --- a/drivers/ufs/core/ufs-fault-injection.c
> +++ b/drivers/ufs/core/ufs-fault-injection.c
> @@ -19,7 +19,7 @@ enum { FAULT_INJ_STR_SIZE = 80 };
>  
>  /*
>   * For more details about fault injection, please refer to
> - * Documentation/fault-injection/fault-injection.rst.
> + * Documentation/dev-tools/fault-injection/fault-injection.rst.
>   */
>  static char g_trigger_eh_str[FAULT_INJ_STR_SIZE];
>  module_param_cb(trigger_eh, &ufs_fault_ops, g_trigger_eh_str, 0644);
> diff --git a/include/asm-generic/error-injection.h b/include/asm-generic/error-injection.h
> index b05253f68eaa..26b80eec6d5f 100644
> --- a/include/asm-generic/error-injection.h
> +++ b/include/asm-generic/error-injection.h
> @@ -21,8 +21,9 @@ struct pt_regs;
>  /*
>   * Whitelist generating macro. Specify functions which can be error-injectable
>   * using this macro. If you unsure what is required for the error-injectable
> - * functions, please read Documentation/fault-injection/fault-injection.rst
> - * 'Error Injectable Functions' section.
> + * functions, please read
> + * Documentation/dev-tools/fault-injection/fault-injection.rst 'Error
> + * Injectable Functions' section.
>   */
>  #define ALLOW_ERROR_INJECTION(fname, _etype)				\
>  static struct error_injection_entry __used				\
> diff --git a/include/linux/fault-inject.h b/include/linux/fault-inject.h
> index 354413950d34..9b10e50155a6 100644
> --- a/include/linux/fault-inject.h
> +++ b/include/linux/fault-inject.h
> @@ -12,7 +12,7 @@
>  
>  /*
>   * For explanation of the elements of this struct, see
> - * Documentation/fault-injection/fault-injection.rst
> + * Documentation/dev-tools/fault-injection/fault-injection.rst
>   */
>  struct fault_attr {
>  	unsigned long probability;
> diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
> index a30c03a66172..a0e66c01042e 100644
> --- a/lib/Kconfig.debug
> +++ b/lib/Kconfig.debug
> @@ -2019,7 +2019,7 @@ config FAULT_INJECTION
>  	depends on DEBUG_KERNEL
>  	help
>  	  Provide fault-injection framework.
> -	  For more details, see Documentation/fault-injection/.
> +	  For more details, see Documentation/dev-tools/fault-injection/.
>  
>  config FAILSLAB
>  	bool "Fault-injection capability for kmalloc"
> @@ -2225,7 +2225,7 @@ config LKDTM
>  	called lkdtm.
>  
>  	Documentation on how to use the module can be found in
> -	Documentation/fault-injection/provoke-crashes.rst
> +	Documentation/dev-tools/fault-injection/provoke-crashes.rst
>  
>  config CPUMASK_KUNIT_TEST
>  	tristate "KUnit test for cpumask" if !KUNIT_ALL_TESTS
> diff --git a/tools/testing/fault-injection/failcmd.sh b/tools/testing/fault-injection/failcmd.sh
> index 78dac34264be..ea384c7cae68 100644
> --- a/tools/testing/fault-injection/failcmd.sh
> +++ b/tools/testing/fault-injection/failcmd.sh
> @@ -42,7 +42,7 @@ OPTIONS
>  	--interval=value, --space=value, --verbose=value, --task-filter=value,
>  	--stacktrace-depth=value, --require-start=value, --require-end=value,
>  	--reject-start=value, --reject-end=value, --ignore-gfp-wait=value
> -		See Documentation/fault-injection/fault-injection.rst for more
> +		See Documentation/dev-tools/fault-injection/fault-injection.rst for more
>  		information
>  
>  	failslab options:


Thanks, Carlos





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