| #!/bin/sh |
| |
| count_zvols() { |
| if [ -z "$zvols" ]; then |
| echo 0 |
| else |
| echo "$zvols" | wc -l |
| fi |
| } |
| |
| filter_out_zvols_with_links() { |
| while read -r zvol; do |
| if [ ! -L "/dev/zvol/$zvol" ]; then |
| echo "$zvol" |
| fi |
| done |
| } |
| |
| filter_out_deleted_zvols() { |
| while read -r zvol; do |
| if zfs list "$zvol" >/dev/null 2>&1; then |
| echo "$zvol" |
| fi |
| done |
| } |
| |
| list_zvols() { |
| zfs list -t volume -H -o name,volmode,receive_resume_token | |
| while read -r zvol_line; do |
| name=$(echo "$zvol_line" | awk '{print $1}') |
| volmode=$(echo "$zvol_line" | awk '{print $2}') |
| token=$(echo "$zvol_line" | awk '{print $3}') |
| # |
| # /dev links are not created for zvols with volmode = "none". |
| # |
| [ "$volmode" = "none" ] && continue |
| # |
| # We also also ignore partially received zvols if it is |
| # not an incremental receive, as those won't even have a block |
| # device minor node created yet. |
| # |
| if [ "$token" != "-" ]; then |
| # |
| # Incremental receives create an invisible clone that |
| # is not automatically displayed by zfs list. |
| # |
| if ! zfs list "$name/%recv" >/dev/null 2>&1; then |
| continue |
| fi |
| fi |
| echo "$name" |
| done |
| } |
| |
| zvols=$(list_zvols) |
| zvols_count=$(count_zvols) |
| if [ "$zvols_count" -eq 0 ]; then |
| echo "No zvols found, nothing to do." |
| exit 0 |
| fi |
| |
| echo "Testing $zvols_count zvol links" |
| |
| outer_loop=0 |
| while [ "$outer_loop" -lt 20 ]; do |
| outer_loop=$((outer_loop + 1)) |
| |
| old_zvols_count=$(count_zvols) |
| |
| inner_loop=0 |
| while [ "$inner_loop" -lt 30 ]; do |
| inner_loop=$((inner_loop + 1)) |
| |
| zvols="$(echo "$zvols" | filter_out_zvols_with_links)" |
| |
| zvols_count=$(count_zvols) |
| if [ "$zvols_count" -eq 0 ]; then |
| echo "All zvol links are now present." |
| exit 0 |
| fi |
| sleep 1 |
| done |
| |
| echo "Still waiting on $zvols_count zvol links ..." |
| # |
| # Although zvols should normally not be deleted at boot time, |
| # if that is the case then their links will be missing and |
| # we would stall. |
| # |
| if [ "$old_zvols_count" -eq "$zvols_count" ]; then |
| echo "No progress since last loop." |
| echo "Checking if any zvols were deleted." |
| |
| zvols=$(echo "$zvols" | filter_out_deleted_zvols) |
| zvols_count=$(count_zvols) |
| |
| if [ "$old_zvols_count" -ne "$zvols_count" ]; then |
| echo "$((old_zvols_count - zvols_count)) zvol(s) deleted." |
| fi |
| |
| if [ "$zvols_count" -ne 0 ]; then |
| echo "Remaining zvols:" |
| echo "$zvols" |
| else |
| echo "All zvol links are now present." |
| exit 0 |
| fi |
| fi |
| done |
| |
| echo "Timed out waiting on zvol links" |
| exit 1 |