[PATCH net-next v2 0/2] selftests: rds: add config file and config.sh -c option

[PATCH net-next v2 0/2] selftests: rds: add config file and config.sh -c option

[Allison Henderson]

This series adds an RDS-specific config file for ksft CI and extends
config.sh with a -c flag to specify an alternate config file path.
Users can now specify the path of the config they want to update, or
default to .config if none is specified. 

Allison Henderson (2):
  selftests: rds: add tools/testing/selftests/net/rds/config
  selftests: rds: Add -c config option to rds/config.sh

 tools/testing/selftests/net/rds/Makefile  |  1 +
 tools/testing/selftests/net/rds/config    |  5 +++
 tools/testing/selftests/net/rds/config.sh | 37 ++++++++++++++---------
 3 files changed, 28 insertions(+), 15 deletions(-)
 create mode 100644 tools/testing/selftests/net/rds/config

-- 
2.43.0

[PATCH net-next v2 1/2] selftests: rds: add tools/testing/selftests/net/rds/config

[Allison Henderson]

The ksft CI runtime needs an rds specific config file to build a
minimal kernel with the right options enabled.  This patch adds
an rds selftest config containing the required CONFIG_RDS* and
CONFIG_NET_* options.

Signed-off-by: Allison Henderson <achender@kernel.org>
---
 tools/testing/selftests/net/rds/Makefile | 1 +
 tools/testing/selftests/net/rds/config   | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/tools/testing/selftests/net/rds/Makefile b/tools/testing/selftests/net/rds/Makefile
index fe363be8e358..3eb0f633fd73 100644
--- a/tools/testing/selftests/net/rds/Makefile
+++ b/tools/testing/selftests/net/rds/Makefile
@@ -9,6 +9,7 @@ TEST_FILES := \
 	include.sh \
 	settings \
 	test.py \
+	config \
 # end of TEST_FILES
 
 EXTRA_CLEAN := \
diff --git a/tools/testing/selftests/net/rds/config b/tools/testing/selftests/net/rds/config
new file mode 100644
index 000000000000..103f9d941d10
--- /dev/null
+++ b/tools/testing/selftests/net/rds/config
@@ -0,0 +1,5 @@
+CONFIG_RDS=y
+CONFIG_RDS_TCP=y
+CONFIG_NET_NS=y
+CONFIG_VETH=y
+CONFIG_NET_SCH_NETEM=y
-- 
2.43.0

Re: [PATCH net-next v2 1/2] selftests: rds: add tools/testing/selftests/net/rds/config

[Jakub Kicinski]

On Wed, 18 Mar 2026 17:46:17 -0700 Allison Henderson wrote:
> --- a/tools/testing/selftests/net/rds/Makefile
> +++ b/tools/testing/selftests/net/rds/Makefile
> @@ -9,6 +9,7 @@ TEST_FILES := \
>  	include.sh \
>  	settings \
>  	test.py \
> +	config \
>  # end of TEST_FILES
>  
>  EXTRA_CLEAN := \
> diff --git a/tools/testing/selftests/net/rds/config b/tools/testing/selftests/net/rds/config
> new file mode 100644
> index 000000000000..103f9d941d10
> --- /dev/null
> +++ b/tools/testing/selftests/net/rds/config
> @@ -0,0 +1,5 @@
> +CONFIG_RDS=y
> +CONFIG_RDS_TCP=y
> +CONFIG_NET_NS=y
> +CONFIG_VETH=y
> +CONFIG_NET_SCH_NETEM=y

Contents of both these files need to be sorted according to the whims
of these scripts:
selftests: rds: add config file and config.sh -c option 

Re: [PATCH net-next v2 1/2] selftests: rds: add tools/testing/selftests/net/rds/config

[Jakub Kicinski]

On Thu, 19 Mar 2026 16:54:35 -0700 Jakub Kicinski wrote:
> Contents of both these files need to be sorted according to the whims
> of these scripts:
> selftests: rds: add config file and config.sh -c option 

paste fail, I meant this:
https://github.com/linux-netdev/nipa/tree/main/tests/patch/check_selftest

Re: [PATCH net-next v2 1/2] selftests: rds: add tools/testing/selftests/net/rds/config

[Allison Henderson]

On Thu, 2026-03-19 at 16:55 -0700, Jakub Kicinski wrote:
> On Thu, 19 Mar 2026 16:54:35 -0700 Jakub Kicinski wrote:
> > Contents of both these files need to be sorted according to the whims
> > of these scripts:
> > selftests: rds: add config file and config.sh -c option 
> 
> paste fail, I meant this:
> https://urldefense.com/v3/__https://github.com/linux-netdev/nipa/tree/main/tests/patch/check_selftest__;!!ACWV5N9M2RV99hQ!M3jZzuv3BDBCuz_YVyrkry1kfdvR-eqR0z6RnvQ1mauMbfZsiNUgqGbMZXP9s8BvDqADJA7OSaWddlO4XA$ 
 
Ok, I will take a look at those.  Thank you!

Allison

[PATCH net-next v2 2/2] selftests: rds: Add -c config option to rds/config.sh

[Allison Henderson]

This patch adds a new -c flag to config.sh that enables callers
to specify the file path of the config they would like to update.
If no config is specified, the default will be the .config of the
current directory.

Signed-off-by: Allison Henderson <achender@kernel.org>
---
 tools/testing/selftests/net/rds/config.sh | 37 ++++++++++++++---------
 1 file changed, 22 insertions(+), 15 deletions(-)

diff --git a/tools/testing/selftests/net/rds/config.sh b/tools/testing/selftests/net/rds/config.sh
index 791c8dbe1095..e7a619d7cff0 100755
--- a/tools/testing/selftests/net/rds/config.sh
+++ b/tools/testing/selftests/net/rds/config.sh
@@ -6,15 +6,20 @@ set -u
 set -x
 
 unset KBUILD_OUTPUT
+CONF_FILE=""
+FLAGS=""
 
 GENERATE_GCOV_REPORT=0
-while getopts "g" opt; do
+while getopts "gc:" opt; do
   case ${opt} in
     g)
       GENERATE_GCOV_REPORT=1
       ;;
+    c)
+      CONF_FILE=$OPTARG
+      ;;
     :)
-      echo "USAGE: config.sh [-g]"
+      echo "USAGE: config.sh [-g] [-c config]"
       exit 1
       ;;
     ?)
@@ -24,30 +29,32 @@ while getopts "g" opt; do
   esac
 done
 
-CONF_FILE="tools/testing/selftests/net/config"
+if [[ "$CONF_FILE" != "" ]]; then
+	FLAGS="--file $CONF_FILE"
+fi
 
 # no modules
-scripts/config --file "$CONF_FILE" --disable CONFIG_MODULES
+scripts/config $FLAGS --disable CONFIG_MODULES
 
 # enable RDS
-scripts/config --file "$CONF_FILE" --enable CONFIG_RDS
-scripts/config --file "$CONF_FILE" --enable CONFIG_RDS_TCP
+scripts/config $FLAGS --enable CONFIG_RDS
+scripts/config $FLAGS --enable CONFIG_RDS_TCP
 
 if [ "$GENERATE_GCOV_REPORT" -eq 1 ]; then
 	# instrument RDS and only RDS
-	scripts/config --file "$CONF_FILE" --enable CONFIG_GCOV_KERNEL
-	scripts/config --file "$CONF_FILE" --disable GCOV_PROFILE_ALL
-	scripts/config --file "$CONF_FILE" --enable GCOV_PROFILE_RDS
+	scripts/config $FLAGS --enable CONFIG_GCOV_KERNEL
+	scripts/config $FLAGS --disable GCOV_PROFILE_ALL
+	scripts/config $FLAGS --enable GCOV_PROFILE_RDS
 else
-	scripts/config --file "$CONF_FILE" --disable CONFIG_GCOV_KERNEL
-	scripts/config --file "$CONF_FILE" --disable GCOV_PROFILE_ALL
-	scripts/config --file "$CONF_FILE" --disable GCOV_PROFILE_RDS
+	scripts/config $FLAGS --disable CONFIG_GCOV_KERNEL
+	scripts/config $FLAGS --disable GCOV_PROFILE_ALL
+	scripts/config $FLAGS --disable GCOV_PROFILE_RDS
 fi
 
 # need network namespaces to run tests with veth network interfaces
-scripts/config --file "$CONF_FILE" --enable CONFIG_NET_NS
-scripts/config --file "$CONF_FILE" --enable CONFIG_VETH
+scripts/config $FLAGS --enable CONFIG_NET_NS
+scripts/config $FLAGS --enable CONFIG_VETH
 
 # simulate packet loss
-scripts/config --file "$CONF_FILE" --enable CONFIG_NET_SCH_NETEM
+scripts/config $FLAGS --enable CONFIG_NET_SCH_NETEM
 
-- 
2.43.0

Re: [net-next,v2,2/2] selftests: rds: Add -c config option to rds/config.sh

[Simon Horman]

This is an AI-generated review of your patch. The human sending this
email has considered the AI review valid, or at least plausible.

For local reproduction steps see https://netdev-ai.bots.linux.dev/ai-local.html
---
selftests: rds: Add -c config option to rds/config.sh

This patch adds a new -c flag to config.sh that enables callers to specify
the file path of the config they would like to update. If no config is
specified, the default will be the .config of the current directory.

> diff --git a/tools/testing/selftests/net/rds/config.sh b/tools/testing/selftests/net/rds/config.sh
> index 791c8dbe1095..e7a619d7cff0 100755
> --- a/tools/testing/selftests/net/rds/config.sh
> +++ b/tools/testing/selftests/net/rds/config.sh
> @@ -6,15 +6,20 @@ set -u
>  set -x
>
>  unset KBUILD_OUTPUT
> +CONF_FILE=""
> +FLAGS=""
>
>  GENERATE_GCOV_REPORT=0
> -while getopts "g" opt; do
> +while getopts "gc:" opt; do
>    case ${opt} in
>      g)
>        GENERATE_GCOV_REPORT=1
>        ;;
> +    c)
> +      CONF_FILE=$OPTARG
> +      ;;
>      :)
> -      echo "USAGE: config.sh [-g]"
> +      echo "USAGE: config.sh [-g] [-c config]"
>        exit 1
>        ;;
>      ?)
> @@ -24,30 +29,32 @@ while getopts "g" opt; do
>    esac
>  done
>
> -CONF_FILE="tools/testing/selftests/net/config"
> +if [[ "$CONF_FILE" != "" ]]; then
> +	FLAGS="--file $CONF_FILE"
> +fi

This changes the default behavior - config.sh now modifies .config in the
current directory when no -c option is provided, but the README.txt wasn't
updated. Looking at README.txt:

    # Create a suitable gcov enabled .config
    tools/testing/selftests/net/rds/config.sh -g

    # Alternatly create a gcov disabled .config
    tools/testing/selftests/net/rds/config.sh

    # build the kernel
    vng --build  --config tools/testing/selftests/net/config

Won't this workflow break? The old config.sh modified
tools/testing/selftests/net/config, but the new version modifies .config.
When following the README, config.sh now modifies .config, but vng builds
using the unmodified tools/testing/selftests/net/config, so the kernel
would be built with incorrect configuration (CONFIG_RDS, CONFIG_RDS_TCP,
CONFIG_NET_NS, CONFIG_VETH, CONFIG_NET_SCH_NETEM may not be properly
enabled, and CONFIG_MODULES may not be disabled).

Should the README examples be updated to either use
"-c tools/testing/selftests/net/config" or adjust the vng command to use
".config"?

Alternatively, for backward compatibility, the default could remain
tools/testing/selftests/net/config and require "-c .config" for the new
behavior.

>
>  # no modules
> -scripts/config --file "$CONF_FILE" --disable CONFIG_MODULES
> +scripts/config $FLAGS --disable CONFIG_MODULES

[ ... ]

Re: [net-next,v2,2/2] selftests: rds: Add -c config option to rds/config.sh

[Allison Henderson]

On Thu, 2026-03-19 at 20:13 +0000, Simon Horman wrote:
> This is an AI-generated review of your patch. The human sending this
> email has considered the AI review valid, or at least plausible.
Alrighty, I will update the README.  Thank you!

Allison

> 
> For local reproduction steps see https://urldefense.com/v3/__https://netdev-ai.bots.linux.dev/ai-local.html__;!!ACWV5N9M2RV99hQ!Nwy4iPSdRAP7B5dpWucPIupDV2txt0qJKgmHbXVPdiBg3MuD4r9odJvbg8VWDf84sQ-oj8P8yeDHPNh5nVU$ 
> ---
> selftests: rds: Add -c config option to rds/config.sh
> 
> This patch adds a new -c flag to config.sh that enables callers to specify
> the file path of the config they would like to update. If no config is
> specified, the default will be the .config of the current directory.
> 
> > diff --git a/tools/testing/selftests/net/rds/config.sh b/tools/testing/selftests/net/rds/config.sh
> > index 791c8dbe1095..e7a619d7cff0 100755
> > --- a/tools/testing/selftests/net/rds/config.sh
> > +++ b/tools/testing/selftests/net/rds/config.sh
> > @@ -6,15 +6,20 @@ set -u
> >  set -x
> > 
> >  unset KBUILD_OUTPUT
> > +CONF_FILE=""
> > +FLAGS=""
> > 
> >  GENERATE_GCOV_REPORT=0
> > -while getopts "g" opt; do
> > +while getopts "gc:" opt; do
> >    case ${opt} in
> >      g)
> >        GENERATE_GCOV_REPORT=1
> >        ;;
> > +    c)
> > +      CONF_FILE=$OPTARG
> > +      ;;
> >      :)
> > -      echo "USAGE: config.sh [-g]"
> > +      echo "USAGE: config.sh [-g] [-c config]"
> >        exit 1
> >        ;;
> >      ?)
> > @@ -24,30 +29,32 @@ while getopts "g" opt; do
> >    esac
> >  done
> > 
> > -CONF_FILE="tools/testing/selftests/net/config"
> > +if [[ "$CONF_FILE" != "" ]]; then
> > +	FLAGS="--file $CONF_FILE"
> > +fi
> 
> This changes the default behavior - config.sh now modifies .config in the
> current directory when no -c option is provided, but the README.txt wasn't
> updated. Looking at README.txt:
> 
>     # Create a suitable gcov enabled .config
>     tools/testing/selftests/net/rds/config.sh -g
> 
>     # Alternatly create a gcov disabled .config
>     tools/testing/selftests/net/rds/config.sh
> 
>     # build the kernel
>     vng --build  --config tools/testing/selftests/net/config
> 
> Won't this workflow break? The old config.sh modified
> tools/testing/selftests/net/config, but the new version modifies .config.
> When following the README, config.sh now modifies .config, but vng builds
> using the unmodified tools/testing/selftests/net/config, so the kernel
> would be built with incorrect configuration (CONFIG_RDS, CONFIG_RDS_TCP,
> CONFIG_NET_NS, CONFIG_VETH, CONFIG_NET_SCH_NETEM may not be properly
> enabled, and CONFIG_MODULES may not be disabled).
> 
> Should the README examples be updated to either use
> "-c tools/testing/selftests/net/config" or adjust the vng command to use
> ".config"?
> 
> Alternatively, for backward compatibility, the default could remain
> tools/testing/selftests/net/config and require "-c .config" for the new
> behavior.
> 
> > 
> >  # no modules
> > -scripts/config --file "$CONF_FILE" --disable CONFIG_MODULES
> > +scripts/config $FLAGS --disable CONFIG_MODULES
> 
> [ ... ]

Re: [net-next,v2,2/2] selftests: rds: Add -c config option to rds/config.sh

[Simon Horman]

On Fri, Mar 20, 2026 at 03:05:22AM +0000, Allison Henderson wrote:
> On Thu, 2026-03-19 at 20:13 +0000, Simon Horman wrote:
> > This is an AI-generated review of your patch. The human sending this
> > email has considered the AI review valid, or at least plausible.
> Alrighty, I will update the README.  Thank you!

Thanks.

FWIIW, I do agree the code changes here in v2 are in line with the
discussion around v1.

...

Re: [PATCH net-next v2 2/2] selftests: rds: Add -c config option to rds/config.sh

[Simon Horman]

On Wed, Mar 18, 2026 at 05:46:18PM -0700, Allison Henderson wrote:
> This patch adds a new -c flag to config.sh that enables callers
> to specify the file path of the config they would like to update.
> If no config is specified, the default will be the .config of the
> current directory.
> 
> Signed-off-by: Allison Henderson <achender@kernel.org>

Hi Allison,

Shell checks complains about unquoted variables (SC2086) in this patch.
As the script was previously shellcheck clean it would be nice
to keep it that way.

...

Re: [PATCH net-next v2 2/2] selftests: rds: Add -c config option to rds/config.sh

[Allison Henderson]

On Thu, 2026-03-19 at 20:16 +0000, Simon Horman wrote:
> On Wed, Mar 18, 2026 at 05:46:18PM -0700, Allison Henderson wrote:
> > This patch adds a new -c flag to config.sh that enables callers
> > to specify the file path of the config they would like to update.
> > If no config is specified, the default will be the .config of the
> > current directory.
> > 
> > Signed-off-by: Allison Henderson <achender@kernel.org>
> 
> Hi Allison,
> 
> Shell checks complains about unquoted variables (SC2086) in this patch.
> As the script was previously shellcheck clean it would be nice
> to keep it that way.
Ok, I will fix those then.  Thank you!

Allison

> 
> ...