new file mode 100755
@@ -0,0 +1,119 @@
+#! /bin/bash
+# FS QA Test 027
+#
+# Test replace of a missing device on various data and metadata profiles.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2016 Facebook. All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it would be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write the Free Software Foundation,
+# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+#-----------------------------------------------------------------------
+#
+
+seq=`basename $0`
+seqres=$RESULT_DIR/$seq
+echo "QA output created by $seq"
+
+here=`pwd`
+tmp=/tmp/$$
+status=1 # failure is the default!
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+_cleanup()
+{
+ cd /
+ rm -f $tmp.*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+
+# remove previous $seqres.full before test
+rm -f $seqres.full
+
+# real QA test starts here
+
+_supported_fs generic
+_supported_os IRIX Linux
+# we check scratch dev after each loop
+_require_scratch_nocheck
+_require_scratch_dev_pool 5
+_require_scratch_dev_pool_equal_size
+_btrfs_get_profile_configs replace-missing
+_require_command "$WIPEFS_PROG" wipefs
+
+run_test()
+{
+ local mkfs_opts=$1
+ local saved_scratch_dev_pool=$SCRATCH_DEV_POOL
+ local replace_dev=`echo $SCRATCH_DEV_POOL | awk '{print $NF}'`
+
+ echo "Test $mkfs_opts" >>$seqres.full
+
+ SCRATCH_DEV_POOL=`echo $SCRATCH_DEV_POOL | sed -e "s# *$replace_dev *##"`
+ _scratch_pool_mkfs $mkfs_opts >>$seqres.full 2>&1
+ # make sure we created btrfs with desired options
+ if [ $? -ne 0 ]; then
+ echo "mkfs $mkfs_opts failed"
+ SCRATCH_DEV_POOL=$saved_scratch_dev_pool
+ return
+ fi
+ _scratch_mount >>$seqres.full 2>&1
+
+ local missing_dev=`echo $SCRATCH_DEV_POOL | awk '{print $2}'`
+ local missing_dev_id=`$BTRFS_UTIL_PROG fi show $SCRATCH_MNT | grep $missing_dev | awk '{print $2}'`
+
+ # get some data on the filesystem so there's something to replace
+ dd if=/dev/urandom of="$SCRATCH_MNT"/file1 bs=1M count=1 \
+ >>$seqres.full 2>&1
+ dd if=/dev/urandom of="$SCRATCH_MNT"/file2 bs=1M count=2 \
+ >>$seqres.full 2>&1
+ dd if=/dev/urandom of="$SCRATCH_MNT"/file3 bs=1M count=4 \
+ >>$seqres.full 2>&1
+
+ # nuke a device and remount in degraded mode
+ _scratch_unmount
+ $WIPEFS_PROG -a "$missing_dev" >>$seqres.full 2>&1
+ _scratch_mount -o degraded >>$seqres.full 2>&1
+
+ # replace $missing_dev with $replace_dev and scrub it to double-check
+ $BTRFS_UTIL_PROG replace start -B -r $missing_dev_id $replace_dev \
+ $SCRATCH_MNT -f >>$seqres.full 2>&1
+ if [ $? -ne 0 ]; then
+ echo "btrfs replace failed"
+ SCRATCH_DEV_POOL=$saved_scratch_dev_pool
+ return
+ fi
+ $BTRFS_UTIL_PROG scrub start -B $SCRATCH_MNT >>$seqres.full 2>&1
+ if [ $? -ne 0 ]; then
+ echo "btrfs scrub failed"
+ SCRATCH_DEV_POOL=$saved_scratch_dev_pool
+ return
+ fi
+
+ _scratch_unmount
+ # we called _require_scratch_nocheck instead of _require_scratch
+ # do check after test for each profile config
+ _check_scratch_fs
+ SCRATCH_DEV_POOL=$saved_scratch_dev_pool
+}
+
+echo "Silence is golden"
+for t in "${_btrfs_profile_configs[@]}"; do
+ run_test "$t"
+done
+
+status=0
+exit
new file mode 100644
@@ -0,0 +1,2 @@
+QA output created by 027
+Silence is golden
@@ -29,6 +29,7 @@
024 auto quick compress
025 auto quick send clone
026 auto quick compress prealloc
+027 auto replace
029 auto quick clone
030 auto quick send
031 auto quick subvol clone