Public bug reported: I have already reported this upstream. on ext4, fiemap will not report extents if the requested logical region of a file overlaps the extent less than blocksize. So, if you request star=0, len=100, you will get nothing.
I can provide example code, if you need. ProblemType: Bug Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: leonard 2213 F.... pulseaudio CRDA: Error: [Errno 2] No such file or directory Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0xf8400000 irq 20' Mixer name : 'Realtek ALC268' Components : 'HDA:10ec0268,14c00025,00100003 HDA:10573055,10573055,00100700' Controls : 16 Simple ctrls : 13 Date: Wed Nov 4 20:10:06 2009 DistroRelease: Ubuntu 9.10 HibernationDevice: RESUME=UUID=ba65435a-214b-4e4e-9f46-7ced4d729ad0 MachineType: - N/A NonfreeKernelModules: nvidia Package: linux-image-2.6.31-14-generic 2.6.31-14.48 ProcCmdLine: root=UUID=423f8f68-484f-4773-94bf-da17f38c0dac ro rootfstype=ext4 quiet splash crashkernel=384M-2G:64M,2G-:128M ProcEnviron: LANGUAGE=de_AT.UTF-8 PATH=(custom, user) LANG=de_AT.UTF-8 SHELL=/bin/bash LC_NUMERIC=en_US.UTF-8 ProcVersionSignature: Ubuntu 2.6.31-14.48-generic RelatedPackageVersions: linux-backports-modules-2.6.31-14-generic 2.6.31-14.16 linux-firmware 1.24 SourcePackage: linux Uname: Linux 2.6.31-14-generic x86_64 WpaSupplicantLog: dmi.bios.date: 12/31/2007 dmi.bios.vendor: COMPAL dmi.bios.version: 1.16 dmi.board.name: IFL90 dmi.board.vendor: - dmi.board.version: IFT00 dmi.chassis.asset.tag: - dmi.chassis.type: 10 dmi.chassis.vendor: No Enclosure dmi.chassis.version: N/A dmi.modalias: dmi:bvnCOMPAL:bvr1.16:bd12/31/2007:svn-:pnN/A:pvrN/A:rvn-:rnIFL90:rvrIFT00:cvnNoEnclosure:ct10:cvrN/A: dmi.product.name: N/A dmi.product.version: N/A dmi.sys.vendor: - ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug -- the FS_IOC_FIEMAP ioctl does not report extents of small files https://bugs.launchpad.net/bugs/474597 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs