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Ran 12 Jul 2018 06:38PM UTC

Files 217

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Committed 12 Jul 2018 06:38PM UTC coverage: 64.656% (-0.05%) from 64.71%

Job # TR_ARCH=local GCOV=1

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push

travis-ci

Committed by Andrei Vagin

Commit Message

mount: fix regression where open_mountpoint failed on readonly fs

If we fail to create temporary directory for doing a clean mount we can
make mount clean reusing the code which enters new mountns to umount
overmounts. As when last process exits mntns all mounts are implicitly
cleaned from children, see in kernel source - sys_exit->do_exit
->exit_task_namespaces->switch_task_namespaces->free_nsproxy
->put_mnt_ns->umount_tree->drop_collected_mounts->umount_tree:

    /* Hide the mounts from mnt_mounts */
    list_for_each_entry(p, &tmp_list, mnt_list) {
            list_del_init(&p->mnt_child);
    }

Fixes commit b6cfb1ce2948 ("mount: make open_mountpoint handle overmouts
properly")

https://github.com/checkpoint-restore/criu/issues/520
Signed-off-by: Pavel Tikhomirov <ptikhomirov@virtuozzo.com>
Acked-by: Adrian Reber <areber@redhat.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>

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