#!/bin/sh

# Test handling of read errors.

. $(dirname $0)/conf.sh

echo 1..3

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

attach_md us0 -t vnode -f $m1
attach_md us1 -t vnode -f $m2

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

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

EIO=5
# gmirror should retry a failed read from the other mirror.
sysctl ${regreadfp}="1*return(${EIO})[pid $(gmirror_worker_pid)]"
dd if=/dev/mirror/$name of=$tmp1 iseek=256 bs=$ddbs count=1 >/dev/null 2>&1
dd if=/dev/$us1 of=$tmp2 iseek=256 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

# Make sure that one of the mirrors was marked broken.
genid1=$(gmirror dump /dev/$us0 | awk '/^[[:space:]]*genid: /{print $2}')
genid2=$(gmirror dump /dev/$us1 | awk '/^[[:space:]]*genid: /{print $2}')
if [ $genid1 -eq $(($genid2 + 1)) -o $genid2 -eq $(($genid1 + 1)) ]; then
	echo "ok 2"
else
	echo "not ok 2"
fi

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

# Make sure that the component wasn't re-added to the gmirror.
if [ $(gmirror status -s $name | wc -l) -eq 1 ]; then
	echo "ok 3"
else
	echo "not ok 3"
fi

rm -f $m1 $m2 $tmp1 $tmp2