** Changed in: linux (Ubuntu Trusty) Importance: Undecided => Medium -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1809868
Title: 29d6d30f5c8aa58b04f40a58442df3bcaae5a1d5 in btrfs_kernel_fixes failed on T Status in ubuntu-kernel-tests: In Progress Status in linux package in Ubuntu: Invalid Status in linux source package in Trusty: In Progress Bug description: == Justification == When doing an incremental send on a Btrfs filesystem, if we delete a directory that has N > 1 hardlinks for the same file and that file has the highest inode number inside the directory contents, an incremental send would send N times rmdir operation against the directory. This made the btrfs receive command fail on the second rmdir instruction, as the target directory didn't exist anymore. This issue can be triggered with 29d6d30f5c8aa58b04f40a58442df3bcaae5a1d5 test in ubuntu_btrfs_kernel_fixes test suite. The test will fail with: "ERROR: rmdir o259-6-0 failed. No such file or directory" with Trusty kernel. Performing full device TRIM (1.00GiB) ... Turning ON incompat feature 'extref': increased hardlink limit per file to 65536 WARNING! - Btrfs v3.12 IS EXPERIMENTAL WARNING! - see http://btrfs.wiki.kernel.org before using fs created label (null) on /dev/loop0 nodesize 16384 leafsize 16384 sectorsize 4096 size 1.00GiB Btrfs v3.12 Create a readonly snapshot of '/tmp/mnt-29d6d30f5c8aa58b04f40a58442df3bcaae5a1d5' in '/tmp/mnt-29d6d30f5c8aa58b04f40a58442df3bcaae5a1d5/snap1' At subvol /tmp/mnt-29d6d30f5c8aa58b04f40a58442df3bcaae5a1d5/snap1 Create a readonly snapshot of '/tmp/mnt-29d6d30f5c8aa58b04f40a58442df3bcaae5a1d5' in '/tmp/mnt-29d6d30f5c8aa58b04f40a58442df3bcaae5a1d5/snap2' At subvol /tmp/mnt-29d6d30f5c8aa58b04f40a58442df3bcaae5a1d5/snap2 Performing full device TRIM (1.00GiB) ... Turning ON incompat feature 'extref': increased hardlink limit per file to 65536 WARNING! - Btrfs v3.12 IS EXPERIMENTAL WARNING! - see http://btrfs.wiki.kernel.org before using fs created label (null) on /dev/loop0 nodesize 16384 leafsize 16384 sectorsize 4096 size 1.00GiB Btrfs v3.12 At subvol snap1 At snapshot snap2 ERROR: rmdir o259-6-0 failed. No such file or directory incremental receive failed == Fix == 29d6d30f5 (Btrfs: send, don't send rmdir for same target multiple times) This patch needs to be backported for a variable difference in the process_recorded_refs function. In the Trusty tree: static int process_recorded_refs(struct send_ctx *sctx) In the patch: static int process_recorded_refs(struct send_ctx *sctx, int *pending_move) As the new *pending_move is unrelated here, we can just backport the patch with the same logic in this function. A test kernel could be found here: http://people.canonical.com/~phlin/kernel/lp-1809868-btrfs-2nd-rmdir/ This test will pass with this kernel. == Regression potential == Low, this patch just adds an extra check to skip unnecessary rmdir operations. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-164-generic 3.13.0-164.214 ProcVersionSignature: User Name 3.13.0-164.214-generic 3.13.11-ckt39 Uname: Linux 3.13.0-164-generic x86_64 AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 Dec 27 03:14 seq crw-rw---- 1 root audio 116, 33 Dec 27 03:14 timer AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.14.1-0ubuntu3.29 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: CurrentDmesg: [13958.095408] btrfs: device fsid da34075a-4eaa-4e50-aeea-02206e8c8e44 devid 1 transid 4 /dev/loop0 [13958.102670] btrfs: device fsid da34075a-4eaa-4e50-aeea-02206e8c8e44 devid 1 transid 4 /dev/loop0 [13958.105901] btrfs: device fsid da34075a-4eaa-4e50-aeea-02206e8c8e44 devid 1 transid 4 /dev/loop0 [13958.106099] btrfs: disk space caching is enabled [13958.107771] btrfs: creating UUID tree Date: Thu Dec 27 07:11:58 2018 IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' Lsusb: Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub MachineType: QEMU Standard PC (i440FX + PIIX, 1996) PciMultimedia: ProcFB: 0 cirrusdrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-164-generic root=UUID=576666e8-9e7f-40ee-934e-f1dce18323e5 ro console=ttyS0,115200n8 RelatedPackageVersions: linux-restricted-modules-3.13.0-164-generic N/A linux-backports-modules-3.13.0-164-generic N/A linux-firmware 1.127.24 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) WifiSyslog: dmi.bios.date: 04/01/2014 dmi.bios.vendor: SeaBIOS dmi.bios.version: Ubuntu-1.8.2-1ubuntu1 dmi.chassis.type: 1 dmi.chassis.vendor: QEMU dmi.chassis.version: pc-i440fx-xenial dmi.modalias: dmi:bvnSeaBIOS:bvrUbuntu-1.8.2-1ubuntu1:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-xenial:cvnQEMU:ct1:cvrpc-i440fx-xenial: dmi.product.name: Standard PC (i440FX + PIIX, 1996) dmi.product.version: pc-i440fx-xenial dmi.sys.vendor: QEMU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-kernel-tests/+bug/1809868/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
