Public bug reported: Hello I am trying to understand how the three commands testb, icheck and ncheck of the debugfs command work. My goal is to use them to find all the sectors allocated to a file. For this, I created a test set consisting of a 100% full EXT4 partition containing only one file. Here are the features:
mount /dev/sda9 /mnt/TEST df --block-size=512 -text4 | grep TEST /dev/sda9 42456 41392 0 100% /mnt/TEST So I think there are only 1064 (42456-41392) unused sectors. To check it, I make this script: rm -v testb.in for ((k=1;k<42457;k++));do echo testb $k >>testb.in done debugfs -f testb.in /dev/sda9 > testb.out 2>err then I control head -2 testb.out; tail -2 testb.out ; head -2 err; tail -1 err debugfs: testb 1 Block 1 marked in use debugfs: testb 42456 Block 42456 not in use debugfs 1.46.5 (30-Dec-2021) Illegal block number passed to ext2fs_test_block_bitmap #6656 for block bitmap for /dev/sda9 Illegal block number passed to ext2fs_test_block_bitmap #42456 for block bitmap for /dev/sda9 I can only find this reported incident: https://bugs.launchpad.net/ubuntu/+source/e2fsprogs/+bug/1487787 grep "Illegal block number passed to ext2fs_test_block_bitmap" err | wc -l 35801 i.e. 84% rejection. The rest of the treatment will not be good grep "marked in use" testb.out | wc -l 6522 grep "not in use" testb.out | wc -l 35934 I don't know if it's because of a missing option, misuse or malfunction of the command. thank you for looking into the problem. ProblemType: Bug DistroRelease: Ubuntu 22.04 Package: evince 42.3-0ubuntu2 ProcVersionSignature: Ubuntu 5.15.0-58.64-generic 5.15.74 Uname: Linux 5.15.0-58-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.11-0ubuntu82.3 Architecture: amd64 CasperMD5CheckResult: unknown CurrentDesktop: ubuntu:GNOME Date: Sun Jan 22 16:18:03 2023 InstallationDate: Installed on 2022-02-16 (339 days ago) InstallationMedia: Ubuntu 20.04.3 LTS "Focal Fossa" - Release amd64 (20210819) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=fr_FR.UTF-8 SHELL=/bin/bash SourcePackage: evince UpgradeStatus: Upgraded to jammy on 2022-08-19 (156 days ago) ** Affects: evince (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug jammy wayland-session -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to evince in Ubuntu. https://bugs.launchpad.net/bugs/2003649 Title: Illegal block number passed to ext2fs_test_block_bitmap Status in evince package in Ubuntu: New Bug description: Hello I am trying to understand how the three commands testb, icheck and ncheck of the debugfs command work. My goal is to use them to find all the sectors allocated to a file. For this, I created a test set consisting of a 100% full EXT4 partition containing only one file. Here are the features: mount /dev/sda9 /mnt/TEST df --block-size=512 -text4 | grep TEST /dev/sda9 42456 41392 0 100% /mnt/TEST So I think there are only 1064 (42456-41392) unused sectors. To check it, I make this script: rm -v testb.in for ((k=1;k<42457;k++));do echo testb $k >>testb.in done debugfs -f testb.in /dev/sda9 > testb.out 2>err then I control head -2 testb.out; tail -2 testb.out ; head -2 err; tail -1 err debugfs: testb 1 Block 1 marked in use debugfs: testb 42456 Block 42456 not in use debugfs 1.46.5 (30-Dec-2021) Illegal block number passed to ext2fs_test_block_bitmap #6656 for block bitmap for /dev/sda9 Illegal block number passed to ext2fs_test_block_bitmap #42456 for block bitmap for /dev/sda9 I can only find this reported incident: https://bugs.launchpad.net/ubuntu/+source/e2fsprogs/+bug/1487787 grep "Illegal block number passed to ext2fs_test_block_bitmap" err | wc -l 35801 i.e. 84% rejection. The rest of the treatment will not be good grep "marked in use" testb.out | wc -l 6522 grep "not in use" testb.out | wc -l 35934 I don't know if it's because of a missing option, misuse or malfunction of the command. thank you for looking into the problem. ProblemType: Bug DistroRelease: Ubuntu 22.04 Package: evince 42.3-0ubuntu2 ProcVersionSignature: Ubuntu 5.15.0-58.64-generic 5.15.74 Uname: Linux 5.15.0-58-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.11-0ubuntu82.3 Architecture: amd64 CasperMD5CheckResult: unknown CurrentDesktop: ubuntu:GNOME Date: Sun Jan 22 16:18:03 2023 InstallationDate: Installed on 2022-02-16 (339 days ago) InstallationMedia: Ubuntu 20.04.3 LTS "Focal Fossa" - Release amd64 (20210819) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=fr_FR.UTF-8 SHELL=/bin/bash SourcePackage: evince UpgradeStatus: Upgraded to jammy on 2022-08-19 (156 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/evince/+bug/2003649/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
