#!/bin/sh

# Test handling of read errors.

. $(dirname $0)/conf.sh

echo 1..4

set -e

ddbs=2048
regreadfp="debug.fail_point.g_mirror_regular_request_read"
m1=$(mktemp $base.XXXXXX)
m2=$(mktemp $base.XXXXXX)

dd if=/dev/random of=$m1 bs=$ddbs count=1024 >/dev/null 2>&1
dd if=/dev/zero of=$m2 bs=$ddbs count=1024 >/dev/null 2>&1

us0=$(attach_md -t vnode -f $m1)
us1=$(attach_md -t vnode -f $m2)

gmirror label $name /dev/$us0
gmirror insert $name /dev/$us1
devwait
syncwait

tmp1=$(mktemp $base.XXXXXX)
tmp2=$(mktemp $base.XXXXXX)

ENXIO=6
# gmirror has special handling for ENXIO. It does not mark the failed component
# as broken, allowing it to rejoin the mirror automatically when it appears.
sysctl ${regreadfp}="1*return(${ENXIO})[pid $(gmirror_worker_pid)]"
dd if=/dev/mirror/$name of=$tmp1 iseek=512 bs=$ddbs count=1 >/dev/null 2>&1
dd if=/dev/$us1 of=$tmp2 iseek=512 bs=$ddbs count=1 >/dev/null 2>&1
sysctl ${regreadfp}='off'

if cmp -s $tmp1 $tmp2; then
	echo "ok 1"
else
	echo "not ok 1"
fi

# Verify that the genids still match after ENXIO.
genid1=$(gmirror dump /dev/$us0 | awk '/^[[:space:]]*genid: /{print $2}')
genid2=$(gmirror dump /dev/$us1 | awk '/^[[:space:]]*genid: /{print $2}')
if [ $genid1 -eq $genid2 ]; then
	echo "ok 2"
else
	echo "not ok 2"
fi

# Trigger a syncid bump.
dd if=/dev/zero of=/dev/mirror/$name bs=$ddbs count=1 >/dev/null 2>&1

# The ENXIO+write should have caused a syncid bump.
syncid1=$(gmirror dump /dev/$us0 | awk '/^[[:space:]]*syncid: /{print $2}')
syncid2=$(gmirror dump /dev/$us1 | awk '/^[[:space:]]*syncid: /{print $2}')
if [ $syncid1 -eq $(($syncid2 + 1)) -o $syncid2 -eq $(($syncid1 + 1)) ]; then
	echo "ok 3"
else
	echo "not ok 3"
fi

# Force a retaste of the disconnected component.
if [ $(gmirror status -s $name | awk '{print $3}') = $us0 ]; then
	detach_md $us1
	us1=$(attach_md -t vnode -f $m2)
else
	detach_md $us0
	us0=$(attach_md -t vnode -f $m1)
fi

# Make sure that the retaste caused the mirror to automatically be re-added.
if [ $(gmirror status -s $name | wc -l) -eq 2 ]; then
	echo "ok 4"
else
	echo "not ok 4"
fi

syncwait

rm -f $m1 $m2 $tmp1 $tmp2