On Fri, Dec 18, 2020 at 7:25 AM Massimo B. <[email protected]> wrote: > > On Mon, 2020-12-14 at 09:46 +0000, Filipe Manana wrote: > > > clone mb/Documents.AZ/0.SYNC/....pdf - source=mb/Documents.AZ/0.SYNC/....pdf > > > source offset=20705280 offset=20709376 length=4096 > > > clone mb/Documents.AZ/0.SYNC/....pdf - > > > source=mb/Documents.AZ/0.SYNC/....pdf > > > source offset=20713472 offset=20713472 length=4096 > > > ERROR: failed to clone extents to mb/Documents.AZ/0.SYNC/....pdf: Invalid > > > argument > > > > It's a different problem. This one because the kernel is sending an > > invalid clone operation - the source and destination offsets are the > > same, which makes the receiver fail. > > Can you tell what's the size (in bytes) of "mb/Documents.AZ/0.SYNC" > > after the receive fails? Both in the destination and source. > > Hi Filipe, > > I already deleted the failing subvolume, now I got the issue again. Here are > the > detailed information about the file: > > > # btrfs send > /mnt/usb/mobiledata/snapshots/mobalindesk/vm/VirtualMachines.20190621T140904+0200 > | mbuffer -v 1 -m 2% | btrfs receive /mnt/local/data/snapshots/vm/ > ... > write IE8 - Win7/IE8 - Win7-disk1.vmdk - offset=4742344704 length=4096 > clone IE8 - Win7/IE8 - Win7-disk1.vmdk - source=IE8 - Win7/IE8 - > Win7-disk1.vmdk source offset=4742184960 offset=4742348800 length=16384 > clone IE8 - Win7/IE8 - Win7-disk1.vmdk - source=IE8 - Win7/IE8 - > Win7-disk1.vmdk source offset=4742184960 offset=4742365184 length=28672 > clone IE8 - Win7/IE8 - Win7-disk1.vmdk - source=IE8 - Win7/IE8 - > Win7-disk1.vmdk source offset=4742246400 offset=4742393856 length=8192 > write IE8 - Win7/IE8 - Win7-disk1.vmdk - offset=4742402048 length=12288 > clone IE8 - Win7/IE8 - Win7-disk1.vmdk - source=IE8 - Win7/IE8 - > Win7-disk1.vmdk source offset=4742410240 offset=4742414336 length=4096 > clone IE8 - Win7/IE8 - Win7-disk1.vmdk - source=IE8 - Win7/IE8 - > Win7-disk1.vmdk source offset=4742418432 offset=4742418432 length=4096 > ERROR: failed to clone extents to IE8 - Win7/IE8 - Win7-disk1.vmdk: Invalid > argument > > summary: 4226 MiByte in 21min 11.4sec - average of 3404 kiB/s > > > # ls -al > "/mnt/usb/mobiledata/snapshots/mobalindesk/vm/VirtualMachines.20190621T140904+0200/IE8 > - Win7/IE8 - Win7-disk1.vmdk" > -rw------- 1 massimo massimo 17932222464 18. Dez 2018 > '/mnt/usb/mobiledata/snapshots/mobalindesk/vm/VirtualMachines.20190621T140904+0200/IE8 > - Win7/IE8 - Win7-disk1.vmdk' > > # ls -al > "/mnt/local/data/snapshots/vm/VirtualMachines.20190621T140904+0200/IE8 - > Win7/IE8 - Win7-disk1.vmdk" > -rw------- 1 root root 4742418432 18. Dez 07:37 > '/mnt/local/data/snapshots/vm/VirtualMachines.20190621T140904+0200/IE8 - > Win7/IE8 - Win7-disk1.vmdk' > > # compsize > "/mnt/usb/mobiledata/snapshots/mobalindesk/vm/VirtualMachines.20190621T140904+0200/IE8 > - Win7/IE8 - Win7-disk1.vmdk" > Type Perc Disk Usage Uncompressed Referenced > TOTAL 45% 7.3G 16G 16G > none 100% 1.9G 1.9G 2.3G > zlib 38% 4.8G 12G 13G > zstd 34% 536M 1.5G 727M > > # compsize > "/mnt/local/data/snapshots/vm/VirtualMachines.20190621T140904+0200/IE8 - > Win7/IE8 - Win7-disk1.vmdk" > Type Perc Disk Usage Uncompressed Referenced > TOTAL 92% 4.1G 4.4G 4.3G > none 100% 3.8G 3.8G 3.8G > zlib 32% 7.3M 22M 22M > zstd 45% 264M 583M 560M > > Does that help you?
It confirms what I suspected and narrows down a bit the possible causes. Are you able to run the send operation again with the following debug path? https://pastebin.com/raw/cEEy9A6W When the issue happens it should dump to dmesg/syslog a debug message that starts with the marker "HERE" and right before it, something that takes several lines to dump a metadata leaf, and with first line being something like this: "leaf <number> gen <number> total ptrs <number> free space <number> owner <number>" That way I can see the specific extent metadata layout that causes send to issue an invalid clone operation (attempting to clone 4096 bytes from eof). Thanks a lot Massimo! > > Best regards, > Massimo > -- Filipe David Manana, “Whether you think you can, or you think you can't — you're right.”
