Public bug reported: Ubuntu release: jammy Package version: libgtop-2.0-11 2.40.0-2build3 Kernel version: 5.15.0-76-generic
Situation: An encrypted partition (root in this case) is mounted on /dev/mapper/cryptroot . /dev/mapper/cryptroot is actually a symlink to ../dm-0 , i.e. /dev/dm-0 . Expected behaviour: glibtop_get_fsusage(&fsusage, "/") should return correct read/write statistics for the partition (i.e. fsusage.read and fusage.write). Observed behaviour: fsusage.read and fusage.write are incorrectly returned as zero. I have tried to further track down the problem. linux_2_6_0() in sysdeps/linux/fsusage.c calls get_device() which checks the table of mounted filesystems and returns "mapper/cryptroot", referring to /dev/mapper/cryptroot . get_sys_path() then turns this into the incorrect sys file path "/sys/block/mapper/cryptroot/stat". It should be "/sys/block/dm-0/stat". Proposed solution: get_sys_path() should check if the device file is a symlink and if so, dereference it before using it as a device name. ** Affects: libgtop2 (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to libgtop2 in Ubuntu. https://bugs.launchpad.net/bugs/2025476 Title: glibtop_get_fsusage() read/write stats not working on encrypted partition Status in libgtop2 package in Ubuntu: New Bug description: Ubuntu release: jammy Package version: libgtop-2.0-11 2.40.0-2build3 Kernel version: 5.15.0-76-generic Situation: An encrypted partition (root in this case) is mounted on /dev/mapper/cryptroot . /dev/mapper/cryptroot is actually a symlink to ../dm-0 , i.e. /dev/dm-0 . Expected behaviour: glibtop_get_fsusage(&fsusage, "/") should return correct read/write statistics for the partition (i.e. fsusage.read and fusage.write). Observed behaviour: fsusage.read and fusage.write are incorrectly returned as zero. I have tried to further track down the problem. linux_2_6_0() in sysdeps/linux/fsusage.c calls get_device() which checks the table of mounted filesystems and returns "mapper/cryptroot", referring to /dev/mapper/cryptroot . get_sys_path() then turns this into the incorrect sys file path "/sys/block/mapper/cryptroot/stat". It should be "/sys/block/dm-0/stat". Proposed solution: get_sys_path() should check if the device file is a symlink and if so, dereference it before using it as a device name. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libgtop2/+bug/2025476/+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