Merging upstream version 4.2+20231026.

Signed-off-by: Daniel Baumann <daniel@debian.org>

tests/00confnames

@@ -0,0 +1,107 @@
+set -x -e
+. tests/templates/names_template
+
+# Test how <devname> and <name> from config are handled during Incremental assemblation.
+# 1-6 <devnode> only tests (no <name> in config).
+# 6-10 <devname> and <name> combinations are tested.
+# 11-13 corner cases.
+
+names_create "/dev/md/name"
+local _UUID="$(mdadm -D --export /dev/md127 | grep MD_UUID | cut -d'=' -f2)"
+[[ "$_UUID" == "" ]] && echo "Cannot obtain UUID for $DEVNODE_NAME" && exit 1
+
+
+# 1. <devname> definition consistent with metadata name.
+names_make_conf $_UUID "/dev/md/name" "empty" $config
+mdadm -S "/dev/md127"
+mdadm -I $dev0 --config=$config
+names_verify "/dev/md127" "name" "name"
+mdadm -S "/dev/md127"
+
+# 2. Same as 1, but use short name form of <devname>.
+names_make_conf $_UUID "name" "empty" $config
+mdadm -I $dev0 --config=$config
+names_verify "/dev/md127" "name" "name"
+mdadm -S "/dev/md127"
+
+# 3. Same as 1, but use different <devname> than metadata provides.
+names_make_conf $_UUID "/dev/md/other" "empty" $config
+mdadm -I $dev0 --config=$config
+names_verify "/dev/md127" "other" "name"
+mdadm -S "/dev/md127"
+
+# 4. Same as 3, but use short name form of <devname>.
+names_make_conf $_UUID "other" "empty" $config
+mdadm -I $dev0 --config=$config
+names_verify "/dev/md127" "other" "name"
+mdadm -S "/dev/md127"
+
+# 5. Force particular node creation by setting <devname> to /dev/mdX. Link is not created in this
+# case.
+names_make_conf $_UUID "/dev/md4" "empty" $config
+mdadm -I $dev0 --config=$config
+names_verify "/dev/md4" "empty" "name"
+mdadm -S "/dev/md4"
+
+# 6. <devname> set to /dev/mdX, <name> same as in metadata.
+# Metadata name and default node used - controversial. Current behavior documented.
+names_make_conf $_UUID "/dev/md22" "name" $config
+mdadm -I $dev0 --config=$config
+names_verify "/dev/md127" "name" "name"
+mdadm -S "/dev/md127"
+
+# 7. <devname> set to /dev/mdX, <name> different than in metadata.
+# Metadata name and default node used - controversial. Current behavior documented.
+names_make_conf $_UUID "/dev/md8" "other" $config
+mdadm -I $dev0 --config=$config
+names_verify "/dev/md127" "name" "name"
+mdadm -S "/dev/md127"
+
+# 8. Both <devname> and <name> different than in metadata.
+# Metadata name and default node used - controversial. Current behavior documented.
+names_make_conf $_UUID "devnode" "other_name" $config
+mdadm -I $dev0 --config=$config
+names_verify "/dev/md127" "name" "name"
+mdadm -S "/dev/md127"
+
+# 9. <devname> set to metadata name, <name> different than in metadata.
+# Metadata name and default node used - controversial. Current behavior documented.
+names_make_conf $_UUID "name" "other_name" $config
+mdadm -I $dev0 --config=$config
+names_verify "/dev/md127" "name" "name"
+mdadm -S "/dev/md127"
+
+# 10. Bad <devname> set, no <name>.
+# Metadata name and default node used - expected.
+names_make_conf $_UUID "/im/bad/devname" "empty" $config
+mdadm -I $dev0 --config=$config
+names_verify "/dev/md127" "name" "name"
+mdadm -S "/dev/md127"
+
+# 11. <devname> with some special symbols and locales, no <name>.
+# <devname> should be ignored.
+names_make_conf $_UUID "tźż-\.,<>st+-" "empty" $config
+mdadm -I $dev0 --config=$config
+names_verify "/dev/md127" "name" "name"
+mdadm -S "/dev/md127"
+
+# 12. No <devname> and <name> set.
+# Metadata name and default node used - expected.
+names_make_conf $_UUID "empty" "empty" $config
+mdadm -I $dev0 --config=$config
+names_verify "/dev/md127" "name" "name"
+mdadm -S "/dev/md127"
+
+# 13. No <devname>, <name> set to /dev/mdX.
+# Entry should be ignored, it is not ignored but result is good anyway.
+names_make_conf $_UUID "empty" "/dev/md12" $config
+mdadm -I $dev0 --config=$config
+names_verify "/dev/md127" "name" "name"
+mdadm -S "/dev/md127"
+
+# 13. No <devname>, <name> with special symbols and locales.
+# Entry should be ignored, it is not ignored but result is good anyway.
+names_make_conf $_UUID "empty" "./\śćń#&" $config
+mdadm -I $dev0 --config=$config
+names_verify "/dev/md127" "name" "name"
+mdadm -S "/dev/md127"

tests/00createnames

@@ -1,93 +1,44 @@
 set -x -e
+. tests/templates/names_template
 
 # Test how <devname> and --name= are handled for create mode.
-# We need to check three properties, generated from those parameters:
-# - devnode name
-# - link in /dev/md/ (MD_DEVNAME property from --detail --export)
-# - name in metadata (MD_NAME property from --examine --export)
-
-function _verify() {
-  local DEVNODE_NAME="$1"
-  local WANTED_LINK="$2"
-  local WANTED_NAME="$3"
-
-  local RES="$(mdadm -D --export $DEVNODE_NAME | grep MD_DEVNAME)"
-  if [[ "$?" != "0" ]]; then
-    echo "Cannot get details for $DEVNODE_NAME - unexpected devnode."
-    exit 1
-  fi
-
-  if [[ "$WANTED_LINK" != "empty" ]]; then
-    local EXPECTED="MD_DEVNAME=$WANTED_LINK"
-      if [[ "$RES" != "$EXPECTED" ]]; then
-        echo "$RES doesn't match $EXPECTED."
-        exit 1
-      fi
-  fi
-
-
-  local RES="$(mdadm -E --export $dev0 | grep MD_NAME)"
-  if [[ "$?" != "0" ]]; then
-    echo "Cannot get metadata from $dev0."
-    exit 1
-  fi
-
-  local EXPECTED="MD_NAME=$(hostname):$WANTED_NAME"
-  if [[ "$RES" != "$EXPECTED" ]]; then
-    echo "$RES doesn't match $EXPECTED."
-    exit 1
-  fi
-}
-
-function _create() {
-  local DEVNAME=$1
-  local NAME=$2
-
-  if [[ -z "$NAME" ]]; then
-    mdadm -CR "$DEVNAME" -l0 -n 1 $dev0 --force
-  else
-    mdadm -CR "$DEVNAME" --name="$NAME" -l0 -n 1 $dev0 --force
-  fi
-
-  if [[ "$?" != "0" ]]; then
-    echo "Cannot create device."
-    exit 1
-  fi
-}
 
 # The most trivial case.
-_create "/dev/md/name"
-_verify "/dev/md127" "name" "name"
+names_create "/dev/md/name"
+names_verify "/dev/md127" "name" "name"
 mdadm -S "/dev/md127"
 
-_create "name"
-_verify "/dev/md127" "name" "name"
+names_create "name"
+names_verify "/dev/md127" "name" "name"
 mdadm -S "/dev/md127"
 
 # Use 'mdX' as name.
-_create "/dev/md/md0"
-_verify "/dev/md127" "md0" "md0"
+names_create "/dev/md/md0"
+names_verify "/dev/md127" "md0" "md0"
 mdadm -S "/dev/md127"
 
-_create "md0"
-_verify "/dev/md127" "md0" "md0"
+names_create "md0"
+names_verify "/dev/md127" "md0" "md0"
 mdadm -S "/dev/md127"
 
 # <devnode> is used to create MD_DEVNAME but, name is used to create MD_NAME.
-_create "/dev/md/devnode" "name"
-_verify "/dev/md127" "devnode" "name"
+names_create "/dev/md/devnode" "name"
+names_verify "/dev/md127" "devnode" "name"
 mdadm -S "/dev/md127"
 
-_create "devnode" "name"
-_verify "/dev/md127" "devnode" "name"
+names_create "devnode" "name"
+names_verify "/dev/md127" "devnode" "name"
 mdadm -S "/dev/md127"
 
 # Devnode points to /dev/ directory. MD_DEVNAME doesn't exist.
-_create "/dev/md0"
-_verify "/dev/md0" "empty" "0"
+names_create "/dev/md0"
+names_verify "/dev/md0" "empty" "0"
 mdadm -S "/dev/md0"
 
 # Devnode points to /dev/ directory and name is set.
-_create "/dev/md0" "name"
-_verify "/dev/md0" "empty" "name"
+names_create "/dev/md0" "name"
+names_verify "/dev/md0" "empty" "name"
 mdadm -S "/dev/md0"
+
+# Devnode is a special ignore keyword. Should be rejected.
+names_create "<ignore>" "name", "true"

tests/06name

@@ -3,8 +3,8 @@ set -x
 # create an array with a name
 
 mdadm -CR $md0 -l0 -n2 --metadata=1 --name="Fred" $dev0 $dev1
-mdadm -E $dev0 | grep 'Name : [^:]*:Fred ' > /dev/null || exit 1
-mdadm -D $md0 | grep 'Name : [^:]*:Fred ' > /dev/null || exit 1
+mdadm -E $dev0 | grep 'Name : Fred' > /dev/null || exit 1
+mdadm -D $md0 | grep 'Name : Fred' > /dev/null || exit 1
 mdadm -S $md0
 
 mdadm -A $md0 --name="Fred" $devlist

tests/23rdev-lifetime

@@ -0,0 +1,34 @@
+devname=${dev0##*/}
+devt=`cat /sys/block/$devname/dev`
+pid=""
+runtime=2
+
+clean_up_test() {
+	pill -9 $pid
+	echo clear > /sys/block/md0/md/array_state
+}
+
+trap 'clean_up_test' EXIT
+
+add_by_sysfs() {
+        while true; do
+                echo $devt > /sys/block/md0/md/new_dev
+        done
+}
+
+remove_by_sysfs(){
+        while true; do
+                echo remove > /sys/block/md0/md/dev-${devname}/state
+        done
+}
+
+echo md0 > /sys/module/md_mod/parameters/new_array || die "create md0 failed"
+
+add_by_sysfs &
+pid="$pid $!"
+
+remove_by_sysfs &
+pid="$pid $!"
+
+sleep $runtime
+exit 0

tests/24raid10deadlock

@@ -0,0 +1,88 @@
+devs="$dev0 $dev1 $dev2 $dev3"
+runtime=120
+pid=""
+action_pid=""
+
+set_up_injection()
+{
+	echo -1 > /sys/kernel/debug/fail_make_request/times
+	echo 1 > /sys/kernel/debug/fail_make_request/probability
+	echo 0 > /sys/kernel/debug/fail_make_request/verbose
+	echo 1 > /sys/block/${1##*/}/make-it-fail
+}
+
+clean_up_injection()
+{
+	echo 0 > /sys/block/${1##*/}/make-it-fail
+	echo 0 > /sys/kernel/debug/fail_make_request/times
+	echo 0 > /sys/kernel/debug/fail_make_request/probability
+	echo 2 > /sys/kernel/debug/fail_make_request/verbose
+}
+
+test_rdev()
+{
+	while true; do
+		mdadm -f $md0 $1 &> /dev/null
+		mdadm -r $md0 $1 &> /dev/null
+		mdadm --zero-superblock $1 &> /dev/null
+		mdadm -a $md0 $1 &> /dev/null
+		sleep $2
+	done
+}
+
+test_write_action()
+{
+	while true; do
+		echo frozen > /sys/block/md0/md/sync_action
+		echo idle > /sys/block/md0/md/sync_action
+		sleep 0.1
+	done
+}
+
+set_up_test()
+{
+	fio -h &> /dev/null || die "fio not found"
+
+	# create a simple raid10
+	mdadm -Cv -R -n 4 -l10 $md0 $devs || die "create raid10 failed"
+}
+
+clean_up_test()
+{
+	clean_up_injection $dev0
+	pkill -9 fio
+	kill -9 $pid
+	kill -9 $action_pid
+
+	sleep 1
+
+	if ps $action_pid | tail -1 | awk '{print $3}' | grep D; then
+		die "thread that is writing sysfs is stuck in D state, deadlock is triggered"
+	fi
+	mdadm -S $md0
+}
+
+cat /sys/kernel/debug/fail_make_request/times || die "fault injection is not enabled"
+
+trap 'clean_up_test' EXIT
+
+set_up_test || die "set up test failed"
+
+# backgroup io pressure
+fio -filename=$md0 -rw=randwrite -direct=1 -name=test -bs=4k -numjobs=16 -iodepth=16 &
+
+# trigger add/remove device by io failure
+set_up_injection $dev0
+test_rdev $dev0 2 &
+pid="$pid $!"
+
+# add/remove device directly
+test_rdev $dev3 10 &
+pid="$pid $!"
+
+test_write_action &
+action_pid="$!"
+
+sleep $runtime
+
+exit 0

tests/24raid456deadlock

@@ -0,0 +1,58 @@
+devs="$dev0 $dev1 $dev2 $dev3 $dev4 $dev5"
+runtime=120
+pid=""
+old=`cat /proc/sys/vm/dirty_background_ratio`
+
+test_write_action()
+{
+	while true; do
+		echo check > /sys/block/md0/md/sync_action &> /dev/null
+		sleep 0.1
+		echo idle > /sys/block/md0/md/sync_action &> /dev/null
+	done
+}
+
+test_write_back()
+{
+	fio -filename=$md0 -bs=4k -rw=write -numjobs=1 -name=test \
+		-time_based -runtime=$runtime &> /dev/null
+}
+
+set_up_test()
+{
+	fio -h &> /dev/null || die "fio not found"
+
+	# create a simple raid6
+	mdadm -Cv -R -n 6 -l6 $md0 $devs --assume-clean || die "create raid6 failed"
+
+	# trigger dirty pages write back
+	echo 0 > /proc/sys/vm/dirty_background_ratio
+}
+
+clean_up_test()
+{
+	echo $old > /proc/sys/vm/dirty_background_ratio
+
+	pkill -9 fio
+	kill -9 $pid
+
+	sleep 1
+
+	if ps $pid | tail -1 | awk '{print $3}' | grep D; then
+		die "thread that is writing sysfs is stuck in D state, deadlock is triggered"
+	fi
+	mdadm -S $md0
+}
+
+trap 'clean_up_test' EXIT
+
+set_up_test || die "set up test failed"
+
+test_write_back &
+
+test_write_action &
+pid="$!"
+
+sleep $runtime
+
+exit 0

tests/25raid456-recovery-while-reshape

@@ -0,0 +1,33 @@
+devs="$dev0 $dev1 $dev2"
+
+set_up_test()
+{
+	mdadm -Cv -R -n 3 -l5 $md0 $devs --assume-clean --size=50M || die "create array failed"
+	mdadm -a $md0 $dev3 $dev4 || die "failed to bind new disk to array"
+	echo 1000 > /sys/block/md0/md/sync_speed_max
+}
+
+clean_up_test()
+{
+	mdadm -S $md0
+}
+
+trap 'clean_up_test' EXIT
+
+set_up_test || die "set up test failed"
+
+# trigger reshape
+mdadm --grow -l 6 $md0
+sleep 1
+
+# set up replacement
+echo frozen > /sys/block/md0/md/sync_action
+echo want_replacement > /sys/block/md0/md/rd0/state
+echo reshape > /sys/block/md0/md/sync_action
+sleep 1
+
+# reassemeble array
+mdadm -S $md0 || die "can't stop array"
+mdadm --assemble $md0 $devs $dev3 $dev4 || die "can't assemble array"
+
+exit 0

tests/25raid456-reshape-corrupt-data

@@ -0,0 +1,35 @@
+devs="$dev0 $dev1 $dev2"
+
+set_up_test()
+{
+	mdadm -Cv -R -n 3 -l5 $md0 $devs --size=50M || die "create array failed"
+	mdadm -a $md0 $dev3 || die "failed to bind new disk to array"
+	mkfs.xfs -f $md0 || die "mkfs failed"
+	xfs_ncheck $md0 || die "check fs failed"
+}
+
+clean_up_test()
+{
+	mdadm -S $md0
+}
+
+trap 'clean_up_test' EXIT
+
+set_up_test || die "set up test failed"
+
+# trigger reshape
+echo 1000 > /sys/block/md0/md/sync_speed_max
+mdadm --grow -l 6 $md0
+sleep 1
+
+# stop and start reshape
+echo frozen > /sys/block/md0/md/sync_action
+echo system > /sys/block/md0/md/sync_speed_max
+echo reshape > /sys/block/md0/md/sync_action
+
+mdadm -W $md0
+
+# check if data is corrupted
+xfs_ncheck $md0 || die "data is corrupted after reshape"
+
+exit 0

tests/25raid456-reshape-deadlock

@@ -0,0 +1,34 @@
+devs="$dev0 $dev1 $dev2"
+
+set_up_test()
+{
+	mdadm -Cv -R -n 3 -l5 $md0 $devs --size=50M || die "create array failed"
+	mdadm -a $md0 $dev3 || die "failed to bind new disk to array"
+	echo 1000 > /sys/block/md0/md/sync_speed_max
+}
+
+clean_up_test()
+{
+	echo idle > /sys/block/md0/md/sync_action
+	mdadm -S $md0
+}
+
+trap 'clean_up_test' EXIT
+
+set_up_test || die "set up test failed"
+
+# trigger reshape
+mdadm --grow -l 6 $md0
+sleep 1
+
+# stop reshape
+echo frozen > /sys/block/md0/md/sync_action
+
+# read accross reshape
+dd if=$md0 of=/dev/NULL bs=1m count=100 iflag=direct &> /dev/null &
+sleep 2
+
+# suspend array
+echo 1 > /sys/block/md0/md/suspend_lo
+
+exit 0

tests/25raid456-reshape-while-recovery

@@ -0,0 +1,32 @@
+devs="$dev0 $dev1 $dev2"
+
+set_up_test()
+{
+	mdadm -Cv -R -n 3 -l5 $md0 $devs --assume-clean --size=50M || die "create array failed"
+	mdadm -a $md0 $dev3 $dev4 || die "failed to bind new disk to array"
+	echo 1000 > /sys/block/md0/md/sync_speed_max
+}
+
+clean_up_test()
+{
+	mdadm -S $md0
+}
+
+trap 'clean_up_test' EXIT
+
+set_up_test || die "set up test failed"
+
+# set up replacement
+echo want_replacement > /sys/block/md0/md/rd0/state
+sleep 1
+
+# trigger reshape
+echo frozen > /sys/block/md0/md/sync_action
+mdadm --grow -l 6 $md0
+sleep 1
+
+# reassemeble array
+mdadm -S $md0 || die "can't stop array"
+mdadm --assemble $md0 $devs $dev3 $dev4 || die "can't assemble array"
+
+exit 0

tests/func.sh

@@ -170,7 +170,6 @@ do_setup() {
 				dd if=/dev/zero of=$targetdir/mdtest$d count=$sz bs=1K > /dev/null 2>&1
 			# make sure udev doesn't touch
 			mdadm --zero $targetdir/mdtest$d 2> /dev/null
-			[ -b /dev/loop$d ] || mknod /dev/loop$d b 7 $d
 			if [ $d -eq 7 ]
 			then
 				losetup /dev/loop$d $targetdir/mdtest6 # for multipath use

tests/templates/names_template

@@ -0,0 +1,80 @@
+# NAME is optional. Testing with native 1.2 superblock.
+function names_create() {
+	local DEVNAME=$1
+	local NAME=$2
+	local NEG_TEST=$3
+
+	if [[ -z "$NAME" ]]; then
+		mdadm -CR "$DEVNAME" -l0 -n 1 $dev0 --force
+	else
+		mdadm -CR "$DEVNAME" --name="$NAME" --metadata=1.2 -l0 -n 1 $dev0 --force
+	fi
+
+	if [[ "$NEG_TEST" == "true" ]]; then
+		[[ "$?" == "0" ]] && return 0
+		echo "Negative verification failed"
+		exit 1
+	fi
+
+	if [[ "$?" != "0" ]]; then
+		echo "Cannot create device."
+		exit 1
+	fi
+}
+
+# Three properties to check:
+# - devnode name
+# - link in /dev/md/ (MD_DEVNAME property from --detail --export)
+# - name in metadata (MD_NAME property from --detail --export)- that works only with 1.2 sb.
+function names_verify() {
+	local DEVNODE_NAME="$1"
+	local WANTED_LINK="$2"
+	local WANTED_NAME="$3"
+
+	local RES="$(mdadm -D --export $DEVNODE_NAME | grep MD_DEVNAME)"
+	if [[ "$?" != "0" ]]; then
+		echo "Cannot get details for $DEVNODE_NAME - unexpected devnode."
+		exit 1
+	fi
+
+	if [[ "$WANTED_LINK" != "empty" ]]; then
+		local EXPECTED="MD_DEVNAME=$WANTED_LINK"
+	fi
+
+	if [[ "$RES" != "$EXPECTED" ]]; then
+		echo "$RES doesn't match $EXPECTED."
+		exit 1
+	fi
+
+	local RES="$(mdadm -D --export $DEVNODE_NAME | grep MD_NAME)"
+	if [[ "$?" != "0" ]]; then
+		echo "Cannot get metadata from $dev0."
+		exit 1
+	fi
+
+	local EXPECTED="MD_NAME=$(hostname):$WANTED_NAME"
+	if [[ "$RES" != "$EXPECTED" ]]; then
+		echo "$RES doesn't match $EXPECTED."
+		exit 1
+	fi
+}
+
+# Generate ARRAYLINE for tested array.
+names_make_conf() {
+	local UUID="$1"
+	local WANTED_DEVNAME="$2"
+	local WANTED_NAME="$3"
+	local CONF="$4"
+
+	local LINE="ARRAY metadata=1.2 UUID=$UUID"
+
+	if [[ "$WANTED_DEVNAME" != "empty" ]]; then
+		LINE="$LINE $WANTED_DEVNAME"
+	fi
+
+	if [[ "$WANTED_NAME" != "empty" ]]; then
+		LINE="$LINE name=$WANTED_NAME"
+	fi
+
+	echo $LINE > $CONF
+}