Date: Mon, 7 Nov 2011 21:05:24 +0100 From: Moritz Wilhelmy <moritz@wzff.de> To: freebsd-questions@freebsd.org Subject: Problems with nullfs on 9.0-RC1 Message-ID: <20111107200523.GY16096@barfooze.de>
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Good evening, I have been experiencing problems with accessing a nullfs which has been mounted inside a nullfs. This is meant to be a very elaborate way to exchange files between my jails :-) I have following entries in /etc/fstab on the host system, which runs FreeBSD 9.0-RC1 from a few days ago: /usr/jails/foo/share /shares/foo nullfs ro 0 0 /shares /usr/jails/foo/shares nullfs ro 0 0 /usr/jails/bar/share /shares/bar nullfs ro 0 0 /shares /usr/jails/bar/shares nullfs ro 0 0 etc. If I create a file in the bar jail in /share, let's call it zot, it is available on the host system in /shares/bar, but not inside /usr/jails/foo/shares/bar or /usr/jails/bar/shares/bar. My syslog is full of messages like these: Nov 7 16:44:15 machine kernel: null_bypass: vop_getattr Nov 7 16:44:15 machine kernel: null_bypass: vop_readdir Nov 7 16:44:15 machine kernel: null_bypass: vop_readdir Nov 7 16:44:15 machine kernel: null_bypass: vop_close Nov 7 16:44:15 machine kernel: null_bypass: vop_access Nov 7 16:44:15 machine kernel: null_bypass: vop_open Nov 7 16:44:15 machine kernel: null_bypass: vop_getattr Nov 7 16:44:15 machine kernel: null_bypass: vop_read Nov 7 16:44:15 machine kernel: null_bypass: vop_close Nov 7 16:44:15 machine kernel: null_bypass: vop_access Nov 7 16:44:15 machine kernel: null_bypass: vop_open Nov 7 16:44:15 machine kernel: null_bypass: vop_getattr Nov 7 16:44:15 machine kernel: null_bypass: vop_read Nov 7 16:44:15 machine kernel: null_bypass: vop_close Nov 7 16:44:15 machine kernel: null_bypass: vop_getattr Nov 7 16:44:15 machine kernel: null_bypass: vop_access Nov 7 16:44:15 machine kernel: null_bypass: vop_open Nov 7 16:44:15 machine kernel: null_bypass: vop_getattr Nov 7 16:44:15 machine kernel: null_bypass: vop_readdir Nov 7 16:44:15 machine kernel: null_bypass: vop_readdir Nov 7 16:44:15 machine kernel: null_bypass: vop_close Nov 7 16:44:15 machine kernel: null_bypass: vop_getattr Nov 7 16:44:15 machine last message repeated 2 times Nov 7 16:44:15 machine kernel: null_bypass: vop_access I guess I'm either doing something very stupid here, or this is a bug? The manpage doesn't mention anything about nullfs still being unstable (I read it used to be, with a huge bugs section in the manpage, which read like this: "SLIPPERY WHEN WET, BEWARE OF DOG"). Has anyone run into similar problems? Best regards, Moritz
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