Bug 621994 – emerge -v1 -d --nodeps =sys-kernel/gentoo-sources-4.9.32 failure on btrfs

• Product: Portage Development
• Status: RESOLVED NEEDINFO

[Description Octavian 2017-06-17 09:23:53 UTC]

Created attachment 476734 [details]
emerge --info

emerge -v1 -d --nodeps =sys-kernel/gentoo-sources-4.9.32

....

--- /usr/
--- /usr/share/
--- /usr/share/doc/
>>> /usr/share/doc/gentoo-sources-4.9.32/
!!! copy /var/tmp/portage/sys-kernel/gentoo-sources-4.9.32/image/usr/share/doc/gentoo-sources-4.9.32/0000_README.bz2 -> /usr/share/doc/gentoo-sources-4.9.32/0000_README.bz2 failed.
!!! [Errno 22] Invalid argument
....

This is the first file to get copied.

[Comment 1 Octavian 2017-06-17 10:02:11 UTC]

ls -al /usr/share/doc/gentoo-sources-4.9.32/

-rw-rw-rw- 1 root root 0 Jun 17 10:42 /usr/share/doc/gentoo-sources-4.9.32/0000_README.bz2#new

[Comment 2 Octavian 2017-06-19 13:56:06 UTC]

Created attachment 477212 [details]
another failing emerge.

All emerges suffer from the same issue. I added -d during emerge but still cannot get a clue what is happening. 

See the attached log file.

I would appreciate some help since I cannot emerge any packages anymore. It must be something very simple.

[Comment 3 Octavian 2017-06-19 19:25:53 UTC]

Something similar with Bug 402323 but -xattr does not make any difference.

[Comment 4 Octavian 2017-06-19 20:46:07 UTC]

I think I found the issue:

It's related to btrfs.
Although I have the partitions for a long time the failure appeared this month.

I have the following btrfs subvolumes: 

btrfs subvolume list   /
ID 1473 gen 2152663 top level 5 path var/tmp
....


If I change PORTAGE_TMPDIR=/tmp emerge <whatever> then it works since it is on the same volume with the files being installed. 

Could you check that copying over different subvolumes in btrfs still works?

Best regards,
Octavian

P.S.
I used btrfs subvolume create btrfs partitions.

[Comment 5 Zac Medico 2017-06-25 08:04:45 UTC]

As a workaround, you can add a setting like this to /etc/portage/package.use:

sys-apps/portage -native-extensions

It works for me with btrfs subvolumes on 4.9.31 kernel. For example:

> # btrfs subvolume create /src
> Create subvolume '//src'
> # btrfs subvolume create /dst
> Create subvolume '//dst'
> # echo foo > /src/foo
> # strace python -c 'from portage.util.file_copy import copyfile; copyfile("/src/foo", "/dst/foo")' &> /strace.log

In strace.log it shows copy_file_range succeed:

> lseek(3, 0, SEEK_DATA)                  = 0
> lseek(3, 0, SEEK_HOLE)                  = 4
> lseek(3, 0, SEEK_SET)                   = 0
> copy_file_range(3, NULL, 4, [0], 4, 0)  = 4
> lseek(3, 4, SEEK_DATA)                  = -1 ENXIO (No such device or address)
> lseek(3, 0, SEEK_END)                   = 4
> ftruncate(4, 4)                         = 0
> close(4)                                = 0
> close(3)                                = 0