Date: Mon, 12 Dec 2022 18:01:54 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=268338 Bug ID: 268338 Summary: zfsdev_ioctl prints an error message if called with FIONBIO Product: Base System Version: 13.1-RELEASE Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: email@example.com While working on podman and buildah, I have noticed many messages logged on the console that look like this: len 4 vecnum: 126 sizeof (zfs_cmd_t) 4528 After debugging this a little today, I discovered that this happens when something tries to set non-blocking i/o on a /dev/zfs filedescriptor which translates to a FIONBIO ioctl. The zfs storage layer in for buildah and podman tries to detect whether zfs is available by opening /dev/zfs. The golang runtime libraries unconditionally try to set the descriptor into non-blocking mode causing the error message. I can probably work around this in userland but it seems to me that the freebsd ZFS port should not print this message to console but instead return a suitable error. Currently it returns EINVAL after the printf which seems reasonable. -- You are receiving this mail because: You are the assignee for the bug.