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| author | Valentin David <valentin.david@canonical.com> | 2023-01-09 20:21:16 +0100 |
|---|---|---|
| committer | Valentin David <valentin.david@canonical.com> | 2023-01-11 15:30:44 +0100 |
| commit | 2cc0cd4371b9a3717380c858fc7e1b39cc632d08 (patch) | |
| tree | 3a21407272cc792cf2cd93c94b1e0f7f322fbc11 /src/shutdown | |
| parent | 6dc68a00cfc816678fd713b12ae2a4cf2ae6da85 (diff) | |
| download | systemd-2cc0cd4371b9a3717380c858fc7e1b39cc632d08.tar.gz | |
shutdown: Make all mounts private
When systemd-shutdown is run, shared propagation is not needed anymore. Making
mounts private allow to move mount points. This is needed to untangle cyclic
mounts.
Diffstat (limited to 'src/shutdown')
| -rw-r--r-- | src/shutdown/shutdown.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/shutdown/shutdown.c b/src/shutdown/shutdown.c index d0120bb85d..42111d2772 100644 --- a/src/shutdown/shutdown.c +++ b/src/shutdown/shutdown.c @@ -400,6 +400,11 @@ int main(int argc, char *argv[]) { /* Lock us into memory */ (void) mlockall(MCL_CURRENT|MCL_FUTURE); + /* We need to make mounts private so that we can MS_MOVE in unmount_all(). Kernel does not allow + * MS_MOVE when parent mountpoints have shared propagation. */ + if (mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) < 0) + log_warning_errno(errno, "Failed to make mounts private, ignoring: %m"); + /* Synchronize everything that is not written to disk yet at this point already. This is a good idea so that * slow IO is processed here already and the final process killing spree is not impacted by processes * desperately trying to sync IO to disk within their timeout. Do not remove this sync, data corruption will |