From: Kees Cook <keescook@chromium.org>
To: "Luis R. Rodriguez" <mcgrof@kernel.org>
Cc: "Greg KH" <gregkh@linuxfoundation.org>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Shuah Khan" <shuah@kernel.org>,
"Martin Fuzzey" <mfuzzey@parkeon.com>,
"Mimi Zohar" <zohar@linux.vnet.ibm.com>,
"David Howells" <dhowells@redhat.com>,
pali.rohar@gmail.com, "Takashi Iwai" <tiwai@suse.de>,
arend.vanspriel@broadcom.com, "Rafał Miłecki" <zajec5@gmail.com>,
nbroeking@me.com, "Vikram Mulukutla" <markivx@codeaurora.org>,
stephen.boyd@linaro.org, "Mark Brown" <broonie@kernel.org>,
"Dmitry Torokhov" <dmitry.torokhov@gmail.com>,
"David Woodhouse" <dwmw2@infradead.org>,
"Linus Torvalds" <torvalds@linux-foundation.org>,
Abhay_Salunke@dell.com, bjorn.andersson@linaro.org,
jewalt@lgsinnovations.com, LKML <linux-kernel@vger.kernel.org>,
"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>
Subject: Re: [PATCH v2 04/11] firmware: simplify CONFIG_FW_LOADER_USER_HELPER_FALLBACK further
Date: Tue, 27 Feb 2018 15:20:05 -0800 [thread overview]
Message-ID: <CAGXu5jLHHtehy7ADhRVv7sRTGQseyOE-JJKbciRD1o4jiJ++hg@mail.gmail.com> (raw)
In-Reply-To: <20180224024613.24078-5-mcgrof@kernel.org>
On Fri, Feb 23, 2018 at 6:46 PM, Luis R. Rodriguez <mcgrof@kernel.org> wrote:
> All CONFIG_FW_LOADER_USER_HELPER_FALLBACK really is, is just a bool,
> initailized at build time. Define it as such. This simplifies the
> logic even further, removing now all explicit #ifdefs around the code.
In the next revision, can you mention that struct
firmware_fallback_config is going to grow in future patches. I spent
too long trying to understand why this wasn't just a two line patch
with only IS_ENABLED... added. :)
Acked-by: Kees Cook <keescook@chromium.org>
-Kees
>
> Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>
> ---
> drivers/base/firmware_loader.c | 25 ++++++++++++++++++-------
> 1 file changed, 18 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/base/firmware_loader.c b/drivers/base/firmware_loader.c
> index 7dd36ace6152..59dba794ce1a 100644
> --- a/drivers/base/firmware_loader.c
> +++ b/drivers/base/firmware_loader.c
> @@ -266,6 +266,22 @@ static inline bool fw_state_is_aborted(struct fw_priv *fw_priv)
>
> #ifdef CONFIG_FW_LOADER_USER_HELPER
>
> +/**
> + * struct firmware_fallback_config - firmware fallback configuratioon settings
> + *
> + * Helps describe and fine tune the fallback mechanism.
> + *
> + * @force_sysfs_fallback: force the sysfs fallback mechanism to be used
> + * as if one had enabled CONFIG_FW_LOADER_USER_HELPER_FALLBACK=y.
> + */
> +struct firmware_fallback_config {
> + bool force_sysfs_fallback;
> +};
> +
> +static const struct firmware_fallback_config fw_fallback_config = {
> + .force_sysfs_fallback = IS_ENABLED(CONFIG_FW_LOADER_USER_HELPER_FALLBACK),
> +};
> +
> static inline bool fw_sysfs_done(struct fw_priv *fw_priv)
> {
> return __fw_state_check(fw_priv, FW_STATUS_DONE);
> @@ -1151,19 +1167,14 @@ static int fw_load_from_user_helper(struct firmware *firmware,
> return ret;
> }
>
> -#ifdef CONFIG_FW_LOADER_USER_HELPER_FALLBACK
> -static bool fw_force_sysfs_fallback(unsigned int opt_flags)
> -{
> - return true;
> -}
> -#else
> static bool fw_force_sysfs_fallback(unsigned int opt_flags)
> {
> + if (fw_fallback_config.force_sysfs_fallback)
> + return true;
> if (!(opt_flags & FW_OPT_USERHELPER))
> return false;
> return true;
> }
> -#endif
>
> static bool fw_run_sysfs_fallback(unsigned int opt_flags)
> {
> --
> 2.16.2
>
--
Kees Cook
Pixel Security
next prev parent reply other threads:[~2018-02-27 23:20 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-24 2:46 [PATCH v2 00/11] firmware: cleanup for v4.17 Luis R. Rodriguez
2018-02-24 2:46 ` [PATCH v2 01/11] test_firmware: enable custom fallback testing on limited kernel configs Luis R. Rodriguez
2018-02-27 23:07 ` Kees Cook
2018-02-24 2:46 ` [PATCH v2 02/11] test_firmware: replace syfs fallback check with kconfig_has helper Luis R. Rodriguez
2018-02-27 23:09 ` Kees Cook
2018-02-24 2:46 ` [PATCH v2 03/11] firmware: enable to split firmware_class into separate target files Luis R. Rodriguez
2018-02-24 2:46 ` [PATCH v2 04/11] firmware: simplify CONFIG_FW_LOADER_USER_HELPER_FALLBACK further Luis R. Rodriguez
2018-02-27 23:20 ` Kees Cook [this message]
2018-02-24 2:46 ` [PATCH v2 05/11] firmware: use helpers for setting up a temporary cache timeout Luis R. Rodriguez
2018-02-27 23:20 ` Kees Cook
2018-02-24 2:46 ` [PATCH v2 06/11] firmware: move loading timeout under struct firmware_fallback_config Luis R. Rodriguez
2018-02-27 23:21 ` Kees Cook
2018-02-24 2:46 ` [PATCH v2 07/11] firmware: split firmware fallback functionality into its own file Luis R. Rodriguez
2018-02-27 23:14 ` Kees Cook
2018-02-28 1:28 ` Luis R. Rodriguez
2018-02-28 5:33 ` Kees Cook
2018-02-28 7:11 ` Greg KH
2018-03-08 3:44 ` Luis R. Rodriguez
2018-02-24 2:46 ` [PATCH v2 08/11] firmware: enable run time change of forcing fallback loader Luis R. Rodriguez
2018-02-27 23:22 ` Kees Cook
2018-02-24 2:46 ` [PATCH v2 09/11] firmware: enable to force disable the fallback mechanism at run time Luis R. Rodriguez
2018-02-27 23:23 ` Kees Cook
2018-02-24 2:46 ` [PATCH v2 10/11] test_firmware: add a library for shared helpers Luis R. Rodriguez
2018-02-27 23:16 ` Kees Cook
2018-02-24 2:46 ` [PATCH v2 11/11] test_firmware: test three firmware kernel configs using a proc knob Luis R. Rodriguez
2018-02-27 23:18 ` Kees Cook
2018-02-28 1:32 ` Luis R. Rodriguez
2018-02-28 9:07 ` Josh Triplett
2018-02-28 18:26 ` Luis R. Rodriguez
2018-03-01 0:00 ` Josh Triplett
2018-03-01 0:38 ` Luis R. Rodriguez
2018-03-01 2:25 ` Josh Triplett
2018-03-01 17:33 ` Luis R. Rodriguez
-- strict thread matches above, loose matches on Subject: below --
2018-02-14 0:41 [PATCH v2 00/11] firmware: cleanup for v4.17 Luis R. Rodriguez
2018-02-14 0:41 ` [PATCH v2 04/11] firmware: simplify CONFIG_FW_LOADER_USER_HELPER_FALLBACK further Luis R. Rodriguez
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