IO Error (mktemp failed). about snapper

[blueOkiris]

If I create /home/.snapshots/1 with mkdir, it correctly identifies that it needs to create snapshot 2. Unfortunately, it still fails lol

Perhaps some kind of permissions issue?

Permissions for /.snapshots (the error occurs on all subvolumes in the same way): drwxr-x---. 1 root root 0 Jan 20 16:36 .snapshots

[aschnell]

Can you create a file in /home/.snapshots/2?

[blueOkiris]

$ mkdir /home/.snapshots/2
mkdir: cannot create directory ‘/home/.snapshots/2’: Permission denied
$ sudo mkdir /home/.snapshots/2
$ sudo touch /home/.snapshots/2/tmp-file
$ sudo snapper -c Home create
IO Error (SDir::mktemp failed, errno:13 (Permission denied)).

The end of the log says this:

2023-01-23 09:18:36 WAR libsnapper(8403) FileUtils.cc(SDir):91 - THROW: open failed path:/home/.snapshots/3 errno:2 (No such file or directory)
2023-01-23 09:18:36 WAR libsnapper(8403) Btrfs.cc(checkSnapshot):482 - CAUGHT: open failed path:/home/.snapshots/3 errno:2 (No such file or directory)
2023-01-23 09:18:36 WAR libsnapper(8403) Snapshot.cc(writeInfo):508 - THROW: SDir::mktemp failed, errno:13 (Permission denied)
2023-01-23 09:18:36 WAR libsnapper(8403) Snapshot.cc(createHelper):731 - CAUGHT: SDir::mktemp failed, errno:13 (Permission denied)
2023-01-23 09:18:36 WAR libsnapper(8403) Snapshot.cc(createHelper):737 - RETHROW: SDir::mktemp failed, errno:13 (Permission denied)
2023-01-23 09:18:36 WAR libsnapper(8403) Client.cc(dispatch):1885 - CAUGHT: SDir::mktemp failed, errno:13 (Permission denied)

It's a little different than before.

I have updated my system, so potentially that's why there's a slight difference.

[aschnell]

I have improved the error logging - it logs the errno now.

Please check the permissions on all dirs from /home/.snapshots/2. Do you compile snapper yourself or do you use RPMs? In case you compile it yourself, do you have libbtrfsutil (with headers) installed? Otherwise, which RPMs?

[blueOkiris]

For /home/.snapshots:

$ sudo ls -la /home/.snapshots
total 0
drwxr-x---. 1 root root  4 Jan 23 10:00 .
drwxr-xr-x. 1 root root 30 Jan 19 16:23 ..
drwxr-xr-x. 1 root root  0 Jan 23 09:16 1
drwxr-xr-x. 1 root root 16 Jan 23 09:18 2

And in /home/.snapshots/2:

sudo ls -la /home/.snapshots/2
total 0
drwxr-xr-x. 1 root root 16 Jan 23 09:18 .
drwxr-x---. 1 root root  4 Jan 23 10:00 ..
-rw-r--r--. 1 root root  0 Jan 23 09:18 tmp-file

I use the Fedora repo from snapper.io and then install from dnf

[aschnell]

Seems as if SELinux is needed on Fedora. I have enabled it now.

[blueOkiris]

I know this is closed, but I wanted to confirm the update does work for me as well. Thanks!