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From c9fe9526f07ad24d29842fa853ee458b68660896 Mon Sep 17 00:00:00 2001
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From: Frantisek Sumsal <frantisek@sumsal.cz>
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Date: Fri, 22 Apr 2022 18:03:14 +0200
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Subject: [PATCH] test: extend the "hashed" unit names coverage a bit
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Follow-up to #22759.
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(cherry picked from commit 98f8c316389177169c6599e67010ebb1789a6b26)
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Related: #2083493
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---
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 test/units/testsuite-64.sh | 19 ++++++++++++++++---
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 1 file changed, 16 insertions(+), 3 deletions(-)
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diff --git a/test/units/testsuite-64.sh b/test/units/testsuite-64.sh
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index 218b2ee8d1..5f9aeee261 100755
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--- a/test/units/testsuite-64.sh
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+++ b/test/units/testsuite-64.sh
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@@ -646,7 +646,7 @@ testcase_iscsi_lvm() {
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 }
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 testcase_long_sysfs_path() {
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-    local link logfile mpoint
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+    local cursor link logfile mpoint
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     local expected_symlinks=(
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         "/dev/disk/by-label/data_vol"
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         "/dev/disk/by-label/swap_vol"
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@@ -657,6 +657,12 @@ testcase_long_sysfs_path() {
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         "/dev/disk/by-uuid/deadbeef-dead-dead-beef-222222222222"
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     )
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+    # Create a cursor file to skip messages generated by udevd in initrd, as it
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+    # might not be the same up-to-date version as we currently run (hence generating
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+    # messages we check for later and making the test fail)
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+    cursor="$(mktemp)"
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+    journalctl --cursor-file="${cursor:?}" -n0 -q
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+
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     # Make sure the test device is connected and show its "wonderful" path
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     stat /sys/block/vda
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     readlink -f /sys/block/vda/dev
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@@ -685,13 +691,20 @@ testcase_long_sysfs_path() {
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     udevadm settle
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     logfile="$(mktemp)"
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-    [[ "$(journalctl -b -q --no-pager -o short-monotonic -p info --grep "Device path.*vda.?' too long to fit into unit name" | wc -l)" -eq 0 ]]
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+    # Check state of affairs after https://github.com/systemd/systemd/pull/22759
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+    # Note: can't use `--cursor-file` here, since we don't want to update the cursor
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+    #       after using it
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+    [[ "$(journalctl --after-cursor="$(<"$cursor")" -q --no-pager -o short-monotonic -p info --grep "Device path.*vda.?' too long to fit into unit name" | wc -l)" -eq 0 ]]
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+    [[ "$(journalctl --after-cursor="$(<"$cursor")" -q --no-pager -o short-monotonic --grep "Unit name .*vda.?\.device\" too long, falling back to hashed unit name" | wc -l)" -gt 0 ]]
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+    # Check if the respective "hashed" units exist and are active (plugged)
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+    systemctl status --no-pager "$(readlink -f /sys/block/vda/vda1)"
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+    systemctl status --no-pager "$(readlink -f /sys/block/vda/vda2)"
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     # Make sure we don't unnecessarily spam the log
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     { journalctl -b -q --no-pager -o short-monotonic -p info --grep "/sys/devices/.+/vda[0-9]?" _PID=1 + UNIT=systemd-udevd.service || :;} | tee "$logfile"
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     [[ "$(wc -l <"$logfile")" -lt 10 ]]
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     : >/etc/fstab
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-    rm -fr "${logfile:?}" "${mpoint:?}"
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+    rm -fr "${cursor:?}" "${logfile:?}" "${mpoint:?}"
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 }
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 : >/failed