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From 84995ef8ff7b76cff1cce438fc448f0afa560e23 Mon Sep 17 00:00:00 2001
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From: Karel Zak <kzak@redhat.com>
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Date: Tue, 17 Oct 2017 12:16:27 +0200
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Subject: [PATCH 138/141] tests: backport new ts_scsi_debug_init
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Signed-off-by: Karel Zak <kzak@redhat.com>
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---
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tests/functions.sh | 76 +++++++++++++++++++++++++++++++++++++++++++++++-------
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1 file changed, 66 insertions(+), 10 deletions(-)
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diff --git a/tests/functions.sh b/tests/functions.sh
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index 0d1c9c88a..b930dfe7e 100644
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--- a/tests/functions.sh
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+++ b/tests/functions.sh
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@@ -502,21 +502,77 @@ function ts_fdisk_clean {
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}
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function ts_scsi_debug_init {
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+ local devname
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+ local t
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+ TS_DEVICE="none"
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- modprobe --dry-run --quiet scsi_debug
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- [ "$?" == 0 ] || ts_skip "missing scsi_debug module"
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+ # dry run is not really reliable, real modprobe may still fail
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+ modprobe --dry-run --quiet scsi_debug &>/dev/null \
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+ || ts_skip "missing scsi_debug module (dry-run)"
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- rmmod scsi_debug &> /dev/null
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- modprobe scsi_debug $*
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- [ "$?" == 0 ] || ts_die "Cannot init device"
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+ # skip if still in use or removal of modules not supported at all
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+ # We don't want a slow timeout here so we don't use ts_scsi_debug_rmmod!
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+ modprobe -r scsi_debug &>/dev/null \
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+ || ts_skip "cannot remove scsi_debug module (rmmod)"
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- DEVNAME=$(grep --with-filename scsi_debug /sys/block/*/device/model | awk -F '/' '{print $4}')
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- [ "x${DEVNAME}" == "x" ] && ts_die "Cannot find device"
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+ modprobe -b scsi_debug "$@" &>/dev/null \
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+ || ts_skip "cannot load scsi_debug module (modprobe)"
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- DEVICE="/dev/${DEVNAME}"
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+ # it might be still not loaded, modprobe.conf or whatever
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+ lsmod 2>/dev/null | grep -q "^scsi_debug " \
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+ || ts_skip "scsi_debug module not loaded (lsmod)"
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- sleep 1
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udevadm settle
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- echo $DEVICE
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+ # wait for device if udevadm settle does not work
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+ for t in 0 0.02 0.05 0.1 1; do
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+ sleep $t
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+ devname=$(grep --with-filename scsi_debug /sys/block/*/device/model) && break
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+ done
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+ [ -n "${devname}" ] || ts_die "timeout waiting for scsi_debug device"
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+
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+ devname=$(echo $devname | awk -F '/' '{print $4}')
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+ TS_DEVICE="/dev/${devname}"
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+
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+ # TODO validate that device is really up, for now just a warning on stderr
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+ test -b $TS_DEVICE || echo "warning: scsi_debug device is still down" >&2
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+}
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+
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+# automatically called once in ts_cleanup_on_exit()
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+function ts_scsi_debug_rmmod {
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+ local err=1
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+ local t
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+ local lastmsg
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+
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+ # Return early most importantly in case we are not root or the module does
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+ # not exist at all.
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+ [ $UID -eq 0 ] || return 0
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+ [ -n "$TS_DEVICE" ] || return 0
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+ lsmod 2>/dev/null | grep -q "^scsi_debug " || return 0
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+
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+ udevadm settle
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+
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+ # wait for successful rmmod if udevadm settle does not work
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+ for t in 0 0.02 0.05 0.1 1; do
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+ sleep $t
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+ lastmsg="$(modprobe -r scsi_debug 2>&1)" && err=0 && break
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+ done
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+
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+ if [ "$err" = "1" ]; then
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+ ts_log "rmmod failed: '$lastmsg'"
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+ ts_log "timeout removing scsi_debug module (rmmod)"
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+ return 1
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+ fi
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+ if lsmod | grep -q "^scsi_debug "; then
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+ ts_log "BUG! scsi_debug still loaded"
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+ return 1
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+ fi
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+
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+ # TODO Do we need to validate that all devices are gone?
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+ udevadm settle
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+ test -b "$TS_DEVICE" && echo "warning: scsi_debug device is still up" >&2
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+
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+ # TODO unset TS_DEVICE, check that nobody uses it later, e.g. ts_fdisk_clean
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+
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+ return 0
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}
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--
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2.13.6
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