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8642ef5ab3
See: http://marc.info/?l=linux-fsdevel&m=149520244919284&w=2 XFS doesn't flush the journal on `syncfs()`. GRUB doesn't know how to follow the XFS journal, so if the filesystem is in a dirty state (possible with xfs `/boot`, extremely likely with `/`, if the journaled data includes content for `/boot`, the system may be unbootable if a system crash occurs. Fix this by doing a `FIFREEZE`+`FITHAW` cycle. Now, most people probably would have replaced the `syncfs()` invocation with those two ioctls. But this would have become (I believe) the *only* place in libostree where we weren't safe against interruption. The failure mode would be ugly; nothing else would be able to write to the filesystem until manual intervention. The real fix here I think is to land an atomic `FIFREEZETHAW` ioctl in the kernel. I might try a patch. In the meantime though, let's jump through some hoops and set up a "watchdog" child process that acts as a fallback unfreezer. Closes: https://github.com/ostreedev/ostree/issues/876 Closes: #1049 Approved by: jlebon
30 lines
1007 B
Bash
Executable File
30 lines
1007 B
Bash
Executable File
#!/bin/bash
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#
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# Copyright (C) 2011,2014 Colin Walters <walters@verbum.org>
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, write to the
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# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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# Boston, MA 02111-1307, USA.
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set -euo pipefail
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echo "1..19"
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. $(dirname $0)/libtest.sh
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# Exports OSTREE_SYSROOT so --sysroot not needed.
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setup_os_repository "archive-z2" "grub2 ostree-grub-generator"
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. $(dirname $0)/admin-test.sh
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