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0a9aaa7f0c
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz> Closes #13316
116 lines
2.6 KiB
Bash
Executable File
116 lines
2.6 KiB
Bash
Executable File
#!/bin/sh
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count_zvols() {
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if [ -z "$zvols" ]; then
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echo 0
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else
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echo "$zvols" | wc -l
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fi
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}
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filter_out_zvols_with_links() {
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echo "$zvols" | tr ' ' '+' | while read -r zvol; do
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if ! [ -L "/dev/zvol/$zvol" ]; then
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echo "$zvol"
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fi
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done | tr '+' ' '
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}
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filter_out_deleted_zvols() {
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OIFS="$IFS"
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IFS="
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"
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# shellcheck disable=SC2086
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zfs list -H -o name $zvols 2>/dev/null
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IFS="$OIFS"
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}
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list_zvols() {
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read -r default_volmode < /sys/module/zfs/parameters/zvol_volmode
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zfs list -t volume -H -o \
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name,volmode,receive_resume_token,redact_snaps,keystatus |
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while IFS=" " read -r name volmode token redacted keystatus; do # IFS=\t here!
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# /dev links are not created for zvols with volmode = "none",
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# redacted zvols, or encrypted zvols for which the key has not
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# been loaded.
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[ "$volmode" = "none" ] && continue
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[ "$volmode" = "default" ] && [ "$default_volmode" = "3" ] &&
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continue
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[ "$redacted" = "-" ] || continue
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[ "$keystatus" = "unavailable" ] && continue
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# We also ignore partially received zvols if it is
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# not an incremental receive, as those won't even have a block
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# device minor node created yet.
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if [ "$token" != "-" ]; then
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# Incremental receives create an invisible clone that
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# is not automatically displayed by zfs list.
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if ! zfs list "$name/%recv" >/dev/null 2>&1; then
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continue
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fi
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fi
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echo "$name"
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done
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}
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zvols=$(list_zvols)
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zvols_count=$(count_zvols)
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if [ "$zvols_count" -eq 0 ]; then
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echo "No zvols found, nothing to do."
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exit 0
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fi
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echo "Testing $zvols_count zvol links"
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outer_loop=0
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while [ "$outer_loop" -lt 20 ]; do
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outer_loop=$((outer_loop + 1))
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old_zvols_count=$(count_zvols)
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inner_loop=0
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while [ "$inner_loop" -lt 30 ]; do
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inner_loop=$((inner_loop + 1))
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zvols="$(filter_out_zvols_with_links)"
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zvols_count=$(count_zvols)
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if [ "$zvols_count" -eq 0 ]; then
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echo "All zvol links are now present."
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exit 0
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fi
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sleep 1
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done
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echo "Still waiting on $zvols_count zvol links ..."
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#
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# Although zvols should normally not be deleted at boot time,
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# if that is the case then their links will be missing and
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# we would stall.
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#
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if [ "$old_zvols_count" -eq "$zvols_count" ]; then
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echo "No progress since last loop."
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echo "Checking if any zvols were deleted."
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zvols=$(filter_out_deleted_zvols)
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zvols_count=$(count_zvols)
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if [ "$old_zvols_count" -ne "$zvols_count" ]; then
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echo "$((old_zvols_count - zvols_count)) zvol(s) deleted."
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fi
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if [ "$zvols_count" -ne 0 ]; then
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echo "Remaining zvols:"
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echo "$zvols"
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else
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echo "All zvol links are now present."
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exit 0
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fi
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fi
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done
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echo "Timed out waiting on zvol links"
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exit 1
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