fanotify22.c:59: TBROK: mount(/dev/loop0, test_mnt, ext4, 33, 0x2b348) failed: EROFS (30) since 6.12

[andreas-schwab]

This was introduced by kernel commit d3476f3dad4a ("ext4: don't set SB_RDONLY after filesystem errors").

# ./fanotify22 
tst_tmpdir.c:316: TINFO: Using /tmp/LTP_fanTPCu93 as tmpdir (tmpfs filesystem)
tst_device.c:96: TINFO: Found free device 0 '/dev/loop0'
tst_test.c:1112: TINFO: Formatting /dev/loop0 with ext4 opts='' extra opts=''
mke2fs 1.47.0 (5-Feb-2023)
tst_test.c:1124: TINFO: Mounting /dev/loop0 to /tmp/LTP_fanTPCu93/test_mnt fstyp=ext4 flags=0
tst_test.c:1809: TINFO: LTP version: 20240524-247-g5eaf8ecb9
tst_test.c:1813: TINFO: Tested kernel: 6.12.0-rc4-102-default #1 SMP PREEMPT_DYNAMIC Sun Oct 20 22:44:57 UTC 2024 (f83465d) riscv64
tst_test.c:1652: TINFO: Timeout per run is 0h 00m 30s
fanotify.h:122: TINFO: fid(test_mnt/internal_dir/bad_dir) = e443762c.b1cc0c80.7e82.2f7d5ba4.0...
fanotify.h:122: TINFO: fid(test_mnt/internal_dir) = e443762c.b1cc0c80.7e81.68d9f183.0...
fanotify22.c:278: TINFO: Umounting /tmp/LTP_fanTPCu93/test_mnt
debugfs 1.47.0 (5-Feb-2023)
debugfs 1.47.0 (5-Feb-2023)
fanotify22.c:281: TINFO: Mounting /dev/loop0 to /tmp/LTP_fanTPCu93/test_mnt fstyp=ext4 flags=0
fanotify.h:122: TINFO: fid(test_mnt) = e443762c.b1cc0c80.2.0.0...
fanotify22.c:59: TINFO: Mounting /dev/loop0 to /tmp/LTP_fanTPCu93/test_mnt fstyp=ext4 flags=21
fanotify22.c:59: TBROK: mount(/dev/loop0, test_mnt, ext4, 33, 0x2b348) failed: EROFS (30)

HINT: You _MAY_ be missing kernel fixes:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=124e7c61deb2

Summary:
passed   0
failed   0
broken   1
skipped  0
warnings 0

[metan-ucw]

This is a known issue, @jankara has a in-flight kernel fix.

[pevik]

For a record, it TCONF on 6.11, at least on ext4, with underlying btrfs:

tst_tmpdir.c:316: TINFO: Using /var/tmp/LTP_fanTSvknT as tmpdir (btrfs filesystem)
tst_device.c:96: TINFO: Found free device 0 '/dev/loop0'
tst_test.c:1171: TINFO: Formatting /dev/loop0 with ext4 opts='' extra opts=''
mke2fs 1.47.0 (5-Feb-2023)
tst_test.c:1183: TINFO: Mounting /dev/loop0 to /var/tmp/LTP_fanTSvknT/test_mnt fstyp=ext4 flags=0
tst_test.c:1888: TINFO: LTP version: 20240930
tst_test.c:1892: TINFO: Tested kernel: 6.11.3-2-default #1 SMP PREEMPT_DYNAMIC Fri Oct 11 06:48:36 UTC 2024 (7881e90) x86_64
tst_test.c:1723: TINFO: Timeout per run is 0h 00m 30s
fanotify22.c:297: TCONF: FAN_FS_ERROR not supported on ext4 filesystem

[metan-ucw]

There it is https://lore.kernel.org/linux-ext4/[email protected]/