Message-ID: <CA+G9fYs=3LHdf1ge1MiCoCOUpW=VjPdVWrNJX8+wi7u6N18j3Q@mail.gmail.com>
Date: Wed, 9 Jul 2025 19:18:53 +0530
From: Naresh Kamboju <naresh.kamboju@...aro.org>
To: LTP List <ltp@...ts.linux.it>, open list <linux-kernel@...r.kernel.org>, 
	lkft-triage@...ts.linaro.org, linux-fsdevel@...r.kernel.org, 
	linux-block <linux-block@...r.kernel.org>
Cc: Anders Roxell <anders.roxell@...aro.org>, Dan Carpenter <dan.carpenter@...aro.org>, 
	Arnd Bergmann <arnd@...db.de>, Ben Copeland <benjamin.copeland@...aro.org>, 
	Petr Vorel <pvorel@...e.cz>, chrubis <chrubis@...e.cz>, rbm@...e.com, 
	Jens Axboe <axboe@...nel.dk>, willy@...radead.org, 
	"Martin K. Petersen" <martin.petersen@...cle.com>, Anuj Gupta <anuj20.g@...sung.com>, 
	Kanchan Joshi <joshi.k@...sung.com>, Christoph Hellwig <hch@....de>, Christian Brauner <brauner@...nel.org>
Subject: Re: LTP: syscalls: TWARN ioctl(/dev/loop0, LOOP_SET_STATUS,
 test_dev.img) failed EOPNOTSUPP (95)

On Tue, 8 Jul 2025 at 18:28, Naresh Kamboju <naresh.kamboju@...aro.org> wrote:
>
> Regressions were observed while testing LTP syscalls cachestat01 and
> other related tests on the next-20250702 Linux kernel across several devices.
>
> The issue appears to be related to the inability to configure /dev/loop0
> via the LOOP_SET_STATUS ioctl, which returned EOPNOTSUPP
> (Operation not supported). This results in a TBROK condition,
> causing the test to fail.

Anders, bisected this down to this commit id,
   # first bad commit:
       [9eb22f7fedfc9eb1b7f431a5359abd4d15b0b0cd]
       fs: add ioctl to query metadata and protection info capabilities

> Test environments:
> - arm64
> - qemu-x86_64
> - qemu-riscv
>
> Regression Analysis:
> - New regression? Yes
> - Reproducibility? Yes
>
> Regressions started from next-20250702 ( next-20250708)
> Good: next-20250701
> Bad: next-20250702
>
> Test regression: Linux next-20250702 TWARN ioctl(/dev/loop0,
> LOOP_SET_STATUS, test_dev.img) failed EOPNOTSUPP (95) TBROK Failed to
> acquire device
>
> Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>
>
> ## Test log
> tst_buffers.c:57: TINFO: Test is using guarded buffers
> tst_tmpdir.c:316: TINFO: Using /tmp/LTP_cacQ9AfS0 as tmpdir (tmpfs filesystem)
> tst_device.c:98: TINFO: Found free device 0 '/dev/loop0'
> tst_device.c:190: TWARN: ioctl(/dev/loop0, LOOP_SET_STATUS,
> test_dev.img) failed: EOPNOTSUPP (95)
> tst_device.c:362: TBROK: Failed to acquire device

Lore link,
* https://lore.kernel.org/all/CA+G9fYvk9HHE5UJ7cdJHTcY6P5JKnp+_e+sdC5U-ZQFTP9_hqQ@mail.gmail.com/

>
> ## Source
> * Kernel version: 6.16.0-rc4-next-20250702
> * Git tree: https://kernel.googlesource.com/pub/scm/linux/kernel/git/next/linux-next.git
> * Git sha: 50c8770a42faf8b1c7abe93e7c114337f580a97d
> * Git describe: next-20250702
> * Project: https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20250704/testrun/29017637
> * Architectures: arm64, x86_64, riscv64.
> * Toolchains: gcc-13 and clang-20
> * Kconfigs: defconfig+ltp
>
> ## Build
> * Test log: https://qa-reports.linaro.org/api/testruns/28986655/log_file/
> * Test details:
> https://regressions.linaro.org/lkft/linux-next-master/next-20250702/ltp-syscalls/cachestat01/
> * Test history:
> https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20250704/testrun/29017637/suite/ltp-syscalls/test/cachestat01/history/
> * Build link: https://storage.tuxsuite.com/public/linaro/lkft/builds/2zJjY2EmRMul6P0UgjdOm4Ssiqh/
> * Kernel config:
> https://storage.tuxsuite.com/public/linaro/lkft/builds/2zJjY2EmRMul6P0UgjdOm4Ssiqh/config
>
> ## List of tests
>   - cachestat01
>   - cachestat04
>   - chdir01
>   - chmod09
>   - close_range01
>   - copy_file_range01
>   - copy_file_range02
>   - creat09
>   - fallocate04
>   - fallocate05
>   - fallocate06
>   - fanotify01
>   - fanotify05
>   - fanotify06
>   - fanotify10
>   - fanotify13
>   - fanotify14
>   - fanotify15
>   - fanotify16
>   - fanotify17
>   - fanotify18
>   - fanotify19
>   - fanotify20
>   - fanotify21
>   - fanotify22
>   - fanotify23
>   - fchmodat2_01
>   - fdatasync03
>   - fgetxattr01
>   - fremovexattr01
>   - fremovexattr02
>   - fsetxattr01
>   - fsmount01
>   - fsmount02
>   - fsopen01
>   - fsopen02
>   - fspick01
>   - fspick02
>   - fsskipig01
>   - fsskipig02
>   - fsskipig03
>   - fstatfs01
>   - fstatfs01_64
>   - fsync01
>   - fsync04
>   - getdents01
>   - getdents02
>   - getxattr02
>   - getxattr03
>   - inotify03
>   - ioctl04
>   - ioctl05
>   - ioctl06
>   - ioctl_ficlone02
>   - ioctl_fiemap01
>   - ioctl_loop01
>   - lchown03
>   - linkat02
>   - listmount01
>   - listmount02
>   - lremovexattr01
>   - lstat03
>   - lstat03_64
>   - mkdir09
>   - mknodat02
>   - mmap16
>   - mount01
>   - mount02
>   - mount03
>   - mount04
>   - mount05
>   - mount06
>   - mount07
>   - mount_setattr01
>   - move_mount01
>   - move_mount02
>   - msync04
>   - open_tree01
>   - open_tree02
>   - prctl06
>   - preadv03
>   - preadv03_64
>   - preadv203
>   - preadv203_64
>   - pwritev03
>   - pwritev03_64
>   - quotactl01
>   - quotactl04
>   - quotactl06
>   - quotactl08
>   - quotactl09
>   - readahead02
>   - readdir01
>   - rename01
>   - rename03
>   - rename04
>   - rename05
>   - rename06
>   - rename07
>   - rename08
>   - rename10
>   - rename11
>   - rename12
>   - rename13
>   - rename15
>   - renameat01
>   - setxattr01
>   - stat04
>   - stat04_64
>   - statfs01
>   - statfs01_64
>   - statmount01
>   - statmount02
>   - statmount04
>   - statmount05
>   - statmount06
>   - statmount07
>   - statvfs01
>   - statx06
>   - statx08
>   - statx10
>   - statx11
>   - statx12
>   - sync01
>   - syncfs01
>   - umount01
>   - umount02
>   - umount03
>   - umount2_01
>   - umount2_02
>   - unlink09
>   - utime01
>   - utime02
>   - utime03
>   - utime04
>   - utime05
>   - utimensat01
>   - writev03
>

--
Linaro LKFT
https://lkft.linaro.org

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