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| author | NeilBrown <neil@brown.name> | 2017-06-07 14:28:23 +0200 |
|---|---|---|
| committer | Lennart Poettering <lennart@poettering.net> | 2017-06-07 14:28:23 +0200 |
| commit | 83897d5470190a9818df50026cf38cd97114f77d (patch) | |
| tree | cfbd21929553e4f777d74019f94763466d9b75c1 /src/basic/socket-util.c | |
| parent | udev: stop freeing value after using it for setting sysattr (#6094) (diff) | |
| download | systemd-83897d5470190a9818df50026cf38cd97114f77d.tar.xz systemd-83897d5470190a9818df50026cf38cd97114f77d.zip | |
core/mount: pass "-c" flag to /bin/umount (#6093)
"-c", which is short for "--no-canonicalize", tells /bin/umount
that the path name is canonical (no .. or symlinks etc).
systemd always uses a canonical name, so this flag is appropriate
for systemd to use.
Knowing that the path is canonical allows umount to avoid
some calls to lstat() on the path.
From v2.30 "-c" goes further and causes umount to avoid all
attempts to 'lstat()' (or similar) the path. This is important
when automatically unmounting a filesystem, as lstat() can
hang indefinitely in some cases such as when an NFS server
is not accessible.
"-c" has been supported since util-linux 2.17 which is before the
earliest version supported by systemd.
So "-c" is safe to use now, and once util-linux v2.30 is in use,
it will allow mounts from non-responsive NFS servers to be
unmounted.
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions