[PATCH net v3] selftests: net: fix rps_default_mask with >32 CPUs

[PATCH net v3] selftests: net: fix rps_default_mask with >32 CPUs

[Jakub Kicinski]

If there is more than 32 cpus the bitmask will start to contain
commas, leading to:

./rps_default_mask.sh: line 36: [: 00000000,00000000: integer expression expected

Remove the commas, bash doesn't interpret leading zeroes as oct
so that should be good enough. Switch to bash, Simon reports that
not all shells support this type of substitution.

Fixes: c12e0d5f267d ("self-tests: introduce self-tests for RPS default mask")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
v3:
 - switch to bash
v2: https://lore.kernel.org/all/20240120210256.3864747-1-kuba@kernel.org/
 - remove all commas
v1: https://lore.kernel.org/all/20240119151248.3476897-1-kuba@kernel.org/

CC: shuah@kernel.org
CC: horms@kernel.org
CC: linux-kselftest@vger.kernel.org
---
 tools/testing/selftests/net/rps_default_mask.sh | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/net/rps_default_mask.sh b/tools/testing/selftests/net/rps_default_mask.sh
index a26c5624429f..4287a8529890 100755
--- a/tools/testing/selftests/net/rps_default_mask.sh
+++ b/tools/testing/selftests/net/rps_default_mask.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 # SPDX-License-Identifier: GPL-2.0
 
 readonly ksft_skip=4
@@ -33,6 +33,10 @@ chk_rps() {
 
 	rps_mask=$($cmd /sys/class/net/$dev_name/queues/rx-0/rps_cpus)
 	printf "%-60s" "$msg"
+
+	# In case there is more than 32 CPUs we need to remove commas from masks
+	rps_mask=${rps_mask//,}
+	expected_rps_mask=${expected_rps_mask//,}
 	if [ $rps_mask -eq $expected_rps_mask ]; then
 		echo "[ ok ]"
 	else
-- 
2.43.0

Re: [PATCH net v3] selftests: net: fix rps_default_mask with >32 CPUs

[Simon Horman]

On Mon, Jan 22, 2024 at 11:58:15AM -0800, Jakub Kicinski wrote:
> If there is more than 32 cpus the bitmask will start to contain
> commas, leading to:
> 
> ./rps_default_mask.sh: line 36: [: 00000000,00000000: integer expression expected
> 
> Remove the commas, bash doesn't interpret leading zeroes as oct
> so that should be good enough. Switch to bash, Simon reports that
> not all shells support this type of substitution.
> 
> Fixes: c12e0d5f267d ("self-tests: introduce self-tests for RPS default mask")
> Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Reviewed-by: Simon Horman <horms@kernel.org>

Re: [PATCH net v3] selftests: net: fix rps_default_mask with >32 CPUs

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@kernel.org>:

On Mon, 22 Jan 2024 11:58:15 -0800 you wrote:
> If there is more than 32 cpus the bitmask will start to contain
> commas, leading to:
> 
> ./rps_default_mask.sh: line 36: [: 00000000,00000000: integer expression expected
> 
> Remove the commas, bash doesn't interpret leading zeroes as oct
> so that should be good enough. Switch to bash, Simon reports that
> not all shells support this type of substitution.
> 
> [...]

Here is the summary with links:
  - [net,v3] selftests: net: fix rps_default_mask with >32 CPUs
    https://git.kernel.org/netdev/net/c/0719b5338a0c

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html