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common/cgroup2: better error message if cgroup2 fs is not mounted

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Improve the _require_cgroup2 helper to print a more useful message
if the cgroup2 fs is not mounted.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
This commit is contained in:
Christoph Hellwig
2019-07-15 10:25:21 +02:00
committed by Eryu Guan
parent 901c4e5d19
commit e678a7cc9c
1 changed files with 5 additions and 0 deletions
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common/cgroup2
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@@ -4,9 +4,14 @@ export CGROUP2_PATH="${CGROUP2_PATH:-/sys/fs/cgroup}"
_require_cgroup2()
{
if [ `findmnt -d backward -n -o FSTYPE -f ${CGROUP2_PATH}` != "cgroup2" ]; then
_notrun "cgroup2 not mounted on ${CGROUP2_PATH}"
fi
if [ ! -f "${CGROUP2_PATH}/cgroup.subtree_control" ]; then
_notrun "Test requires cgroup2 enabled"
fi
if [[ ! $(cat ${CGROUP2_PATH}/cgroup.controllers) =~ $1 ]]; then
_notrun "Cgroup2 doesn't support $1 controller $1"
fi