| Message ID | 20211029184245.3623973-1-shr@fb.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v3] btrfs: Add new test for setting the chunk size. | expand |
On Fri, Oct 29, 2021 at 11:42:45AM -0700, Stefan Roesch wrote: > Summary: > > Add new testcase for testing the new btrfs sysfs knob to change the > chunk size. The new knob uses /sys/fs/btrfs/<UUID>/allocation/<block > type>/chunk_size. > > The test case implements three different cases: > - Test allocation with the default chunk size > - Test allocation after increasing the chunk size > - Test allocation when the free space is smaller than the chunk size. > > Note: this test needs to force the allocation of space. It uses the > /sys/fs/btrfs/<UUID>/allocation/<block type>/force_chunk_alloc knob. > > Testing: > The test has been run with volumes of different sizes. > > Signed-off-by: Stefan Roesch <shr@fb.com> > --- > V3: - removed tests for system block type. > - added failure case for system block type. > - renamed stripe_size to chunk_size > V2: - added new functions to common/btrfs and use them in the new test > - _require_btrfs_sysfs_attr - Make sure btrfs supports a sysfs > setting > - _get_btrfs_sysfs_attr - Read sysfs value > - _set_btrfs_sysfs_attr - Write sysfs value > - create file system of required size with _scratch_mkfs_sized > - use shortened error message > - Remove last logging message > --- > common/btrfs | 73 ++++++++++++ > tests/btrfs/248 | 284 ++++++++++++++++++++++++++++++++++++++++++++ > tests/btrfs/248.out | 12 ++ > 3 files changed, 369 insertions(+) > create mode 100755 tests/btrfs/248 > create mode 100644 tests/btrfs/248.out > > diff --git a/common/btrfs b/common/btrfs > index ac880bdd..759a0054 100644 > --- a/common/btrfs > +++ b/common/btrfs > @@ -445,3 +445,76 @@ _scratch_btrfs_is_zoned() > [ `_zone_type ${SCRATCH_DEV}` != "none" ] && return 0 > return 1 > } > + > +# Print the content of /sys/fs/btrfs/$UUID/$ATTR > +# > +# All arguments are necessary, and in this order: > +# - mnt: mount point name, e.g. $SCRATCH_MNT > +# - attr: path name under /sys/fs/btrfs/$uuid/$attr > +# > +# Usage example: > +# _get_btrfs_sysfs_attr /mnt/scratch allocation/data/stripe_size > +_get_btrfs_sysfs_attr() > +{ > + local mnt=$1 > + local attr=$2 > + > + if [ ! -e "$mnt" -o -z "$attr" ];then > + _fail "Usage: _get_btrfs_sysfs_attr <mounted_directory> <attr>" > + fi > + > + local uuid=$(findmnt -n -o UUID ${mnt}) > + cat /sys/fs/btrfs/${uuid}/${attr} > +} > + > +# Write "content" into /sys/fs/btrfs/$UUID/$ATTR > +# > +# All arguments are necessary, and in this order: > +# - mnt: mount point name, e.g. $SCRATCH_MNT > +# - attr: path name under /sys/fs/btrfs/$uuid/$attr > +# - content: the content of $attr > +# > +# Usage example: > +# _set_btrfs_sysfs_attr /mnt/scratch allocation/data/chunk_size > +_set_btrfs_sysfs_attr() > +{ > + local mnt=$1 > + shift > + local attr=$1 > + shift > + local content="$*" > + > + if [ ! -e "$mnt" -o -z "$attr" -o -z "$content" ];then > + _fail "Usage: _set_btrfs_sysfs_attr <mounted_directory> <attr> <content>" > + fi > + > + local uuid=$(findmnt -n -o UUID ${mnt}) > + echo "$content" > /sys/fs/btrfs/${uuid}/${attr} 2>&1 > + if [ $? -ne 0 ]; then > + _log_err "_set_btrfs_sysfs_attr cannot write ${attr}" > + fi > +} > + > +# Verify if the sysfs entry in /sys/fs/btrfs/$UUID/$ATTR exists > +# > +# All arguments are necessary, and in this order: > +# - mnt: mount point name, e.g. $SCRATCH_MNT > +# - attr: path name under /sys/fs/btrfs/$uuid/$attr > +# > +# Usage example: > +# _require_btrfs_sysfs_attr /mnt/scratch allocation/data/chunk_size > +_require_btrfs_sysfs_attr() > +{ > + local mnt=$1 > + local attr=$2 > + > + if [ ! -e "$mnt" -o -z "$attr" ];then > + _fail "Usage: _get_btrfs_sysfs_attr <mounted_directory> <attr>" > + fi > + > + local uuid=$(findmnt -n -o UUID ${mnt}) > + if [[ ! -e /sys/fs/btrfs/${uuid}/${attr} ]]; then > + _notrun "Btrfs does not support sysfs $attr" > + fi indention is off here. > +} > + > diff --git a/tests/btrfs/248 b/tests/btrfs/248 > new file mode 100755 > index 00000000..ae7e8039 > --- /dev/null > +++ b/tests/btrfs/248 > @@ -0,0 +1,284 @@ > +#!/bin/bash > +# SPDX-License-Identifier: GPL-2.0 > +# Copyright (c) 2021 Facebook. All Rights Reserved. > +# > +# FS QA Test 250 > +# > +# Test the new /sys/fs/btrfs/<uuid>/allocation/<block-type>/chunk_size > +# setting. This setting allows the admin to change the chunk size > +# setting for the next allocation. > +# > +# Test 1: > +# Allocate storage for all three block types (data, metadata and system) > +# with the default chunk size. > +# > +# Test 2: > +# Set a new chunk size to double the default size and allocate space > +# for all new block types with the new chunk size. > +# > +# Test 3: > +# Pick an allocation size that is used in a loop and make sure the last > +# allocation cannot be partially fullfilled. > +# > +# Note: Variable naming uses the following convention: if a variable name > +# ends in "_B" then its a byte value, if it ends in "_MB" then the > +# value is in megabytes. > +# > +. ./common/preamble > +_begin_fstest auto > + > +test_file="${TEST_DIR}/${seq}" > +seq=`basename $0` > +seqres="${RESULT_DIR}/${seq}" > + > +# Override the default cleanup function. > +_cleanup() > +{ > + cd / > + rm -f "$test_file" > +} > + > +# Parse a size string which is in the format "XX.XXMib". > +# > +# Parameters: > +# - (IN) Block group type (Data, Metadata, System) > +# - (INOUT) Variable to store block group size in MB > +# > +_parse_size_string() { > + local SIZE=$(echo "$1" | awk 'match($0, /([0-9.]+)/) { print substr($0, RSTART, RLENGTH) }') > + eval $2="${SIZE%.*}" > +} > + > +# Determine the size of the device in MB. > +# > +# Parameters: > +# - (INOUT) Variable to store device size in MB > +# > +_device_size() { > + btrfs fi show ${SCRATCH_MNT} --mbytes | grep devid >> $seqres.full > + local SIZE=$(btrfs fi show ${SCRATCH_MNT} --mbytes | grep devid) > + _parse_size_string $(echo "${SIZE}" | awk '{print $4}') SIZE_ALLOC > + eval $1=${SIZE_ALLOC%.*} > +} > + > +# Determine the free space of a block group in MB. > +# > +# Parameters: > +# - (INOUT) Variable to store free space in MB > +# > +_free_space() { > + local SIZE=$(btrfs fi show ${SCRATCH_MNT} --mbytes | grep devid) > + _parse_size_string $(echo "${SIZE}" | awk '{print $4}') SIZE_ALLOC > + _parse_size_string $(echo "${SIZE}" | awk '{print $6}') SIZE_USED > + eval $1=$(expr ${SIZE_ALLOC} - ${SIZE_USED}) > +} > + > +# Determine how much space in MB has been allocated to a block group. > +# > +# Parameters: > +# - (IN) Block group type (Data, Metadata, System) > +# - (INOUT) Variable to store block group size in MB > +# > +_alloc_size() { > + local SIZE_STRING=$(btrfs filesystem df ${SCRATCH_MNT} -m | grep "$1" | awk '{print $3}') > + _parse_size_string ${SIZE_STRING} BLOCK_GROUP_SIZE > + eval $2="${BLOCK_GROUP_SIZE}" > +} > + > +. ./common/filter > +_supported_fs btrfs > +_require_test > +_require_scratch > +_require_btrfs_fs_sysfs > + > +# Delete log file if it exists. > +rm -f "${seqres}.full" > + > +# Make filesystem. > +_require_scratch_size $((10 * 1024 * 1024)) #kB > +_scratch_mkfs_sized $((10 * 1024 * 1024 * 1024)) >> $seqres.full 2>&1 > +_scratch_mount >> $seqres.full 2>&1 > + > +# Get UUID of device. > +UUID="$(findmnt -n -o UUID ${SCRATCH_MNT})" > +echo "UUID = ${UUID}" >> ${seqres}.full > + Don't forget to delete this when you switch to using the helper below. > +# Check if there is sufficient sysfs support. > +_require_btrfs_sysfs_attr ${SCRATCH_MNT} allocation/metadata/chunk_size > +_require_btrfs_sysfs_attr ${SCRATCH_MNT} allocation/metadata/force_chunk_alloc > + > +# Get free space. > +_free_space FREE_SPACE_MB > +_device_size DEVICE_SIZE_MB > + > +echo "free space = ${FREE_SPACE_MB}MB" >> ${seqres}.full > + > +# Get chunk sizes. > +echo "Capture default chunk sizes." > +FIRST_DATA_CHUNK_SIZE_B=$(_get_btrfs_sysfs_attr ${SCRATCH_MNT} allocation/data/chunk_size) > +FIRST_METADATA_CHUNK_SIZE_B=$(_get_btrfs_sysfs_attr ${SCRATCH_MNT} allocation/metadata/chunk_size) > + > +echo "Orig Data chunk size = ${FIRST_DATA_CHUNK_SIZE_B}" >> ${seqres}.full > +echo "Orig Metaata chunk size = ${FIRST_METADATA_CHUNK_SIZE_B}" >> ${seqres}.full > + > +INIT_ALLOC_SIZE_MB=$(expr \( ${FIRST_DATA_CHUNK_SIZE_B} + ${FIRST_METADATA_CHUNK_SIZE_B} \) / 1024 / 1024) > +echo "Allocation size for initial allocation = ${INIT_ALLOC_SIZE_MB}MB" >> $seqres.full > + > +# > +# Do first allocation with the default chunk sizes for the different block > +# types. > +# > +echo "First allocation." > +_alloc_size "Data" DATA_SIZE_START_MB > +_alloc_size "Metadata" METADATA_SIZE_START_MB > + > +echo "Block group Data alloc size = ${DATA_SIZE_START_MB}MB" >> $seqres.full > +echo "Block group Metadata alloc size = ${METADATA_SIZE_START_MB}MB" >> $seqres.full > + > +_set_btrfs_sysfs_attr ${SCRATCH_MNT} allocation/data/force_chunk_alloc 1 > +_set_btrfs_sysfs_attr ${SCRATCH_MNT} allocation/metadata/force_chunk_alloc 1 > + > +_alloc_size "Data" FIRST_DATA_SIZE_MB > +_alloc_size "Metadata" FIRST_METADATA_SIZE_MB > + > +echo "First block group Data alloc size = ${FIRST_DATA_SIZE_MB}MB" >> ${seqres}.full > +echo "First block group Metadata alloc size = ${FIRST_METADATA_SIZE_MB}MB" >> ${seqres}.full > + > +_free_space FREE_SPACE_AFTER > +echo "Free space after first allocation = ${FREE_SPACE_AFTER}MB" >> ${seqres}.full > + > +# > +# Do allocation with the doubled chunk sizes for the different block types. > +# > +echo "Second allocation." > +SECOND_DATA_CHUNK_SIZE_B=$(expr ${FIRST_DATA_CHUNK_SIZE_B} \* 2) > +SECOND_METADATA_CHUNK_SIZE_B=$(expr ${FIRST_METADATA_CHUNK_SIZE_B} \* 2) > + > +echo "Second block group Data calc alloc size = ${SECOND_DATA_CHUNK_SIZE_B}" >> $seqres.full > +echo "Second block group Metadata calc alloc size = ${SECOND_METADATA_CHUNK_SIZE_B}" >> $seqres.full > + > +# Stripe size is limited to 10% of device size. > +if [[ ${SECOND_DATA_CHUNK_SIZE_B} -gt $(expr ${DEVICE_SIZE_MB} \* 10 \* 1024 \* 1024 / 100) ]]; then > + SECOND_DATA_CHUNK_SIZE_B=$(expr ${DEVICE_SIZE_MB} \* 10 / 100 \* 1024 \* 1024) > +fi > +if [[ ${SECOND_METADATA_CHUNK_SIZE_B} -gt $(expr ${DEVICE_SIZE_MB} \* 10 \* 1024 \* 1024 / 100) ]]; then > + SECOND_METADATA_CHUNK_SIZE_B=$(expr ${DEVICE_SIZE_MB} \* 10 / 100 \* 1024 \* 1024) > +fi > + > +echo "Second block group Data alloc size = ${SECOND_DATA_CHUNK_SIZE_B}" >> $seqres.full > +echo "Second block group Metadata alloc size = ${SECOND_METADATA_CHUNK_SIZE_B}" >> $seqres.full > + > +_set_btrfs_sysfs_attr ${SCRATCH_MNT} allocation/data/chunk_size ${SECOND_DATA_CHUNK_SIZE_B} > +_set_btrfs_sysfs_attr ${SCRATCH_MNT} allocation/metadata/chunk_size ${SECOND_METADATA_CHUNK_SIZE_B} > + > +SECOND_DATA_CHUNK_SIZE_READ_B=$(cat /sys/fs/btrfs/${UUID}/allocation/data/chunk_size) > +SECOND_METADATA_CHUNK_SIZE_READ_B=$(cat /sys/fs/btrfs/${UUID}/allocation/metadata/chunk_size) > + Should this be _get_btrfs_sysfs_attr? > +_set_btrfs_sysfs_attr ${SCRATCH_MNT} allocation/data/force_chunk_alloc 1 > +echo "Allocated data chunk" >> $seqres.full > +_set_btrfs_sysfs_attr ${SCRATCH_MNT} allocation/metadata/force_chunk_alloc 1 > +echo "Allocated metadata chunk" >> $seqres.full > + > +_alloc_size "Data" SECOND_DATA_SIZE_MB > +_alloc_size "Metadata" SECOND_METADATA_SIZE_MB > +_alloc_size "System" SECOND_SYSTEM_SIZE_MB > + > +echo "Calculate request size so last memory allocation cannot be completely fullfilled." > +_free_space FREE_SPACE_MB > + > +# Find request size whose space allocation cannot be completely fullfilled. > +THIRD_DATA_CHUNK_SIZE_MB=$(expr 256) > +until [ ${THIRD_DATA_CHUNK_SIZE_MB} -gt $(expr 7 \* 1024) ] > +do > + if [ $((FREE_SPACE_MB%THIRD_DATA_CHUNK_SIZE_MB)) -ne 0 ]; then > + break > + fi > + THIRD_DATA_CHUNK_SIZE_MB=$((THIRD_DATA_CHUNK_SIZE_MB+256)) > +done > + > +if [[ ${THIRD_DATA_CHUNK_SIZE_MB} -eq $(expr 7 \* 1024) ]]; then > + _fail "Cannot find allocation size for partial block allocation." > +fi > + > +THIRD_DATA_CHUNK_SIZE_B=$(expr ${THIRD_DATA_CHUNK_SIZE_MB} \* 1024 \* 1024) > +echo "Allocation size in mb = ${THIRD_DATA_CHUNK_SIZE_MB}" >> ${seqres}.full > +echo "Allocation size in bytes = ${THIRD_DATA_CHUNK_SIZE_B}" >> ${seqres}.full > + > +# > +# Do allocation until free space is exhausted. > +# > +echo "Third allocation." > +_set_btrfs_sysfs_attr ${SCRATCH_MNT} allocation/data/chunk_size ${THIRD_DATA_CHUNK_SIZE_B} > + > +_free_space FREE_SPACE_MB > +while [ $FREE_SPACE_MB -gt $THIRD_DATA_CHUNK_SIZE_MB ] > +do > + _alloc_size "Data" THIRD_DATA_SIZE_MB > + _set_btrfs_sysfs_attr ${SCRATCH_MNT} allocation/data/force_chunk_alloc 1 > + > + _free_space FREE_SPACE_MB > +done > + > +_alloc_size "Data" FOURTH_DATA_SIZE_MB > + > +# > +# Force chunk allocation of system block tyep must fail. > +# > +echo "Force allocation of system block type must fail." > +_set_btrfs_sysfs_attr ${SCRATCH_MNT} allocation/system/force_chunk_alloc 1 2>&1 You want the error to go to /dev/null, and then check $?. > + > +# > +# Verification of initial allocation. > +# > +echo "Verify first allocation." > +FIRST_DATA_CHUNK_SIZE_MB=$(expr ${FIRST_DATA_CHUNK_SIZE_B} / 1024 / 1024) > +FIRST_METADATA_CHUNK_SIZE_MB=$(expr ${FIRST_METADATA_CHUNK_SIZE_B} / 1024 / 1024) > + > +# if [[ $(expr ${FIRST_DATA_CHUNK_SIZE_MB} + ${DATA_SIZE_START_MB}) -ne $(expr ${FIRST_DATA_SIZE_MB}) ]]; then > +if [[ $(expr ${FIRST_DATA_CHUNK_SIZE_MB} + ${DATA_SIZE_START_MB}) -ne ${FIRST_DATA_SIZE_MB} ]]; then > + _fail "tInitial data allocation not correct." > +fi > + > +if [[ $(expr ${FIRST_METADATA_CHUNK_SIZE_MB} + ${METADATA_SIZE_START_MB}) -ne ${FIRST_METADATA_SIZE_MB} ]]; then > + _fail "Initial metadata allocation not correct." > +fi > + > +# > +# Verification of second allocation. > +# > +echo "Verify second allocation." > +SECOND_DATA_CHUNK_SIZE_MB=$(expr ${SECOND_DATA_CHUNK_SIZE_B} / 1024 / 1024) > +SECOND_METADATA_CHUNK_SIZE_MB=$(expr ${SECOND_METADATA_CHUNK_SIZE_B} / 1024 / 1024) > + > +if [[ ${SECOND_DATA_CHUNK_SIZE_B} -ne ${SECOND_DATA_CHUNK_SIZE_READ_B} ]]; then > + _fail "Value written to allocation/data/chunk_size and read value are different." > +fi > + > +if [[ ${SECOND_METADATA_CHUNK_SIZE_B} -ne ${SECOND_METADATA_CHUNK_SIZE_READ_B} ]]; then > + _fail "Value written to allocation/metadata/chunk_size and read value are different." > +fi > + > +if [[ $(expr ${SECOND_DATA_CHUNK_SIZE_MB} + ${FIRST_DATA_SIZE_MB}) -ne ${SECOND_DATA_SIZE_MB} ]]; then > + _fail "Data allocation after chunk size change not correct." > +fi > + > +if [[ $(expr ${SECOND_METADATA_CHUNK_SIZE_MB} + ${FIRST_METADATA_SIZE_MB}) -ne ${SECOND_METADATA_SIZE_MB} ]]; then > + _fail "Metadata allocation after chunk size change not correct." > +fi > + > +# > +# Verification of third allocation. > +# > +echo "Verify third allocation." > +if [[ ${FREE_SPACE_MB} -gt ${THIRD_DATA_CHUNK_SIZE_MB} ]]; then > + _fail "Free space after allocating over memlimit is too high." > +fi > + > +# The + 1 is required as 1MB is always kept as free space. > +if [[ $(expr ${THIRD_DATA_CHUNK_SIZE_MB} + ${THIRD_DATA_SIZE_MB} + 1) -le $(expr ${FOURTH_DATA_SIZE_MB}) ]]; then > + _fail "Allocation until out of memory: last memory allocation size is not correct." > +fi > + > +status=0 > +exit > + > diff --git a/tests/btrfs/248.out b/tests/btrfs/248.out > new file mode 100644 > index 00000000..cac054a6 > --- /dev/null > +++ b/tests/btrfs/248.out > @@ -0,0 +1,12 @@ > +QA output created by 248 > +Capture default chunk sizes. > +First allocation. > +Second allocation. > +Calculate request size so last memory allocation cannot be completely fullfilled. > +Third allocation. > +Force allocation of system block type must fail. > +_set_btrfs_sysfs_attr cannot write allocation/system/force_chunk_alloc > +(see /root/xfstests/results//btrfs/248.full for details) Testing failure here you generally want to 2>&1 /dev/null and then test for failure and print that out, because the absolute path of results will be different between configurations. Thanks, Josef
diff --git a/common/btrfs b/common/btrfs index ac880bdd..759a0054 100644 --- a/common/btrfs +++ b/common/btrfs @@ -445,3 +445,76 @@ _scratch_btrfs_is_zoned() [ `_zone_type ${SCRATCH_DEV}` != "none" ] && return 0 return 1 } + +# Print the content of /sys/fs/btrfs/$UUID/$ATTR +# +# All arguments are necessary, and in this order: +# - mnt: mount point name, e.g. $SCRATCH_MNT +# - attr: path name under /sys/fs/btrfs/$uuid/$attr +# +# Usage example: +# _get_btrfs_sysfs_attr /mnt/scratch allocation/data/stripe_size +_get_btrfs_sysfs_attr() +{ + local mnt=$1 + local attr=$2 + + if [ ! -e "$mnt" -o -z "$attr" ];then + _fail "Usage: _get_btrfs_sysfs_attr <mounted_directory> <attr>" + fi + + local uuid=$(findmnt -n -o UUID ${mnt}) + cat /sys/fs/btrfs/${uuid}/${attr} +} + +# Write "content" into /sys/fs/btrfs/$UUID/$ATTR +# +# All arguments are necessary, and in this order: +# - mnt: mount point name, e.g. $SCRATCH_MNT +# - attr: path name under /sys/fs/btrfs/$uuid/$attr +# - content: the content of $attr +# +# Usage example: +# _set_btrfs_sysfs_attr /mnt/scratch allocation/data/chunk_size +_set_btrfs_sysfs_attr() +{ + local mnt=$1 + shift + local attr=$1 + shift + local content="$*" + + if [ ! -e "$mnt" -o -z "$attr" -o -z "$content" ];then + _fail "Usage: _set_btrfs_sysfs_attr <mounted_directory> <attr> <content>" + fi + + local uuid=$(findmnt -n -o UUID ${mnt}) + echo "$content" > /sys/fs/btrfs/${uuid}/${attr} 2>&1 + if [ $? -ne 0 ]; then + _log_err "_set_btrfs_sysfs_attr cannot write ${attr}" + fi +} + +# Verify if the sysfs entry in /sys/fs/btrfs/$UUID/$ATTR exists +# +# All arguments are necessary, and in this order: +# - mnt: mount point name, e.g. $SCRATCH_MNT +# - attr: path name under /sys/fs/btrfs/$uuid/$attr +# +# Usage example: +# _require_btrfs_sysfs_attr /mnt/scratch allocation/data/chunk_size +_require_btrfs_sysfs_attr() +{ + local mnt=$1 + local attr=$2 + + if [ ! -e "$mnt" -o -z "$attr" ];then + _fail "Usage: _get_btrfs_sysfs_attr <mounted_directory> <attr>" + fi + + local uuid=$(findmnt -n -o UUID ${mnt}) + if [[ ! -e /sys/fs/btrfs/${uuid}/${attr} ]]; then + _notrun "Btrfs does not support sysfs $attr" + fi +} + diff --git a/tests/btrfs/248 b/tests/btrfs/248 new file mode 100755 index 00000000..ae7e8039 --- /dev/null +++ b/tests/btrfs/248 @@ -0,0 +1,284 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# Copyright (c) 2021 Facebook. All Rights Reserved. +# +# FS QA Test 250 +# +# Test the new /sys/fs/btrfs/<uuid>/allocation/<block-type>/chunk_size +# setting. This setting allows the admin to change the chunk size +# setting for the next allocation. +# +# Test 1: +# Allocate storage for all three block types (data, metadata and system) +# with the default chunk size. +# +# Test 2: +# Set a new chunk size to double the default size and allocate space +# for all new block types with the new chunk size. +# +# Test 3: +# Pick an allocation size that is used in a loop and make sure the last +# allocation cannot be partially fullfilled. +# +# Note: Variable naming uses the following convention: if a variable name +# ends in "_B" then its a byte value, if it ends in "_MB" then the +# value is in megabytes. +# +. ./common/preamble +_begin_fstest auto + +test_file="${TEST_DIR}/${seq}" +seq=`basename $0` +seqres="${RESULT_DIR}/${seq}" + +# Override the default cleanup function. +_cleanup() +{ + cd / + rm -f "$test_file" +} + +# Parse a size string which is in the format "XX.XXMib". +# +# Parameters: +# - (IN) Block group type (Data, Metadata, System) +# - (INOUT) Variable to store block group size in MB +# +_parse_size_string() { + local SIZE=$(echo "$1" | awk 'match($0, /([0-9.]+)/) { print substr($0, RSTART, RLENGTH) }') + eval $2="${SIZE%.*}" +} + +# Determine the size of the device in MB. +# +# Parameters: +# - (INOUT) Variable to store device size in MB +# +_device_size() { + btrfs fi show ${SCRATCH_MNT} --mbytes | grep devid >> $seqres.full + local SIZE=$(btrfs fi show ${SCRATCH_MNT} --mbytes | grep devid) + _parse_size_string $(echo "${SIZE}" | awk '{print $4}') SIZE_ALLOC + eval $1=${SIZE_ALLOC%.*} +} + +# Determine the free space of a block group in MB. +# +# Parameters: +# - (INOUT) Variable to store free space in MB +# +_free_space() { + local SIZE=$(btrfs fi show ${SCRATCH_MNT} --mbytes | grep devid) + _parse_size_string $(echo "${SIZE}" | awk '{print $4}') SIZE_ALLOC + _parse_size_string $(echo "${SIZE}" | awk '{print $6}') SIZE_USED + eval $1=$(expr ${SIZE_ALLOC} - ${SIZE_USED}) +} + +# Determine how much space in MB has been allocated to a block group. +# +# Parameters: +# - (IN) Block group type (Data, Metadata, System) +# - (INOUT) Variable to store block group size in MB +# +_alloc_size() { + local SIZE_STRING=$(btrfs filesystem df ${SCRATCH_MNT} -m | grep "$1" | awk '{print $3}') + _parse_size_string ${SIZE_STRING} BLOCK_GROUP_SIZE + eval $2="${BLOCK_GROUP_SIZE}" +} + +. ./common/filter +_supported_fs btrfs +_require_test +_require_scratch +_require_btrfs_fs_sysfs + +# Delete log file if it exists. +rm -f "${seqres}.full" + +# Make filesystem. +_require_scratch_size $((10 * 1024 * 1024)) #kB +_scratch_mkfs_sized $((10 * 1024 * 1024 * 1024)) >> $seqres.full 2>&1 +_scratch_mount >> $seqres.full 2>&1 + +# Get UUID of device. +UUID="$(findmnt -n -o UUID ${SCRATCH_MNT})" +echo "UUID = ${UUID}" >> ${seqres}.full + +# Check if there is sufficient sysfs support. +_require_btrfs_sysfs_attr ${SCRATCH_MNT} allocation/metadata/chunk_size +_require_btrfs_sysfs_attr ${SCRATCH_MNT} allocation/metadata/force_chunk_alloc + +# Get free space. +_free_space FREE_SPACE_MB +_device_size DEVICE_SIZE_MB + +echo "free space = ${FREE_SPACE_MB}MB" >> ${seqres}.full + +# Get chunk sizes. +echo "Capture default chunk sizes." +FIRST_DATA_CHUNK_SIZE_B=$(_get_btrfs_sysfs_attr ${SCRATCH_MNT} allocation/data/chunk_size) +FIRST_METADATA_CHUNK_SIZE_B=$(_get_btrfs_sysfs_attr ${SCRATCH_MNT} allocation/metadata/chunk_size) + +echo "Orig Data chunk size = ${FIRST_DATA_CHUNK_SIZE_B}" >> ${seqres}.full +echo "Orig Metaata chunk size = ${FIRST_METADATA_CHUNK_SIZE_B}" >> ${seqres}.full + +INIT_ALLOC_SIZE_MB=$(expr \( ${FIRST_DATA_CHUNK_SIZE_B} + ${FIRST_METADATA_CHUNK_SIZE_B} \) / 1024 / 1024) +echo "Allocation size for initial allocation = ${INIT_ALLOC_SIZE_MB}MB" >> $seqres.full + +# +# Do first allocation with the default chunk sizes for the different block +# types. +# +echo "First allocation." +_alloc_size "Data" DATA_SIZE_START_MB +_alloc_size "Metadata" METADATA_SIZE_START_MB + +echo "Block group Data alloc size = ${DATA_SIZE_START_MB}MB" >> $seqres.full +echo "Block group Metadata alloc size = ${METADATA_SIZE_START_MB}MB" >> $seqres.full + +_set_btrfs_sysfs_attr ${SCRATCH_MNT} allocation/data/force_chunk_alloc 1 +_set_btrfs_sysfs_attr ${SCRATCH_MNT} allocation/metadata/force_chunk_alloc 1 + +_alloc_size "Data" FIRST_DATA_SIZE_MB +_alloc_size "Metadata" FIRST_METADATA_SIZE_MB + +echo "First block group Data alloc size = ${FIRST_DATA_SIZE_MB}MB" >> ${seqres}.full +echo "First block group Metadata alloc size = ${FIRST_METADATA_SIZE_MB}MB" >> ${seqres}.full + +_free_space FREE_SPACE_AFTER +echo "Free space after first allocation = ${FREE_SPACE_AFTER}MB" >> ${seqres}.full + +# +# Do allocation with the doubled chunk sizes for the different block types. +# +echo "Second allocation." +SECOND_DATA_CHUNK_SIZE_B=$(expr ${FIRST_DATA_CHUNK_SIZE_B} \* 2) +SECOND_METADATA_CHUNK_SIZE_B=$(expr ${FIRST_METADATA_CHUNK_SIZE_B} \* 2) + +echo "Second block group Data calc alloc size = ${SECOND_DATA_CHUNK_SIZE_B}" >> $seqres.full +echo "Second block group Metadata calc alloc size = ${SECOND_METADATA_CHUNK_SIZE_B}" >> $seqres.full + +# Stripe size is limited to 10% of device size. +if [[ ${SECOND_DATA_CHUNK_SIZE_B} -gt $(expr ${DEVICE_SIZE_MB} \* 10 \* 1024 \* 1024 / 100) ]]; then + SECOND_DATA_CHUNK_SIZE_B=$(expr ${DEVICE_SIZE_MB} \* 10 / 100 \* 1024 \* 1024) +fi +if [[ ${SECOND_METADATA_CHUNK_SIZE_B} -gt $(expr ${DEVICE_SIZE_MB} \* 10 \* 1024 \* 1024 / 100) ]]; then + SECOND_METADATA_CHUNK_SIZE_B=$(expr ${DEVICE_SIZE_MB} \* 10 / 100 \* 1024 \* 1024) +fi + +echo "Second block group Data alloc size = ${SECOND_DATA_CHUNK_SIZE_B}" >> $seqres.full +echo "Second block group Metadata alloc size = ${SECOND_METADATA_CHUNK_SIZE_B}" >> $seqres.full + +_set_btrfs_sysfs_attr ${SCRATCH_MNT} allocation/data/chunk_size ${SECOND_DATA_CHUNK_SIZE_B} +_set_btrfs_sysfs_attr ${SCRATCH_MNT} allocation/metadata/chunk_size ${SECOND_METADATA_CHUNK_SIZE_B} + +SECOND_DATA_CHUNK_SIZE_READ_B=$(cat /sys/fs/btrfs/${UUID}/allocation/data/chunk_size) +SECOND_METADATA_CHUNK_SIZE_READ_B=$(cat /sys/fs/btrfs/${UUID}/allocation/metadata/chunk_size) + +_set_btrfs_sysfs_attr ${SCRATCH_MNT} allocation/data/force_chunk_alloc 1 +echo "Allocated data chunk" >> $seqres.full +_set_btrfs_sysfs_attr ${SCRATCH_MNT} allocation/metadata/force_chunk_alloc 1 +echo "Allocated metadata chunk" >> $seqres.full + +_alloc_size "Data" SECOND_DATA_SIZE_MB +_alloc_size "Metadata" SECOND_METADATA_SIZE_MB +_alloc_size "System" SECOND_SYSTEM_SIZE_MB + +echo "Calculate request size so last memory allocation cannot be completely fullfilled." +_free_space FREE_SPACE_MB + +# Find request size whose space allocation cannot be completely fullfilled. +THIRD_DATA_CHUNK_SIZE_MB=$(expr 256) +until [ ${THIRD_DATA_CHUNK_SIZE_MB} -gt $(expr 7 \* 1024) ] +do + if [ $((FREE_SPACE_MB%THIRD_DATA_CHUNK_SIZE_MB)) -ne 0 ]; then + break + fi + THIRD_DATA_CHUNK_SIZE_MB=$((THIRD_DATA_CHUNK_SIZE_MB+256)) +done + +if [[ ${THIRD_DATA_CHUNK_SIZE_MB} -eq $(expr 7 \* 1024) ]]; then + _fail "Cannot find allocation size for partial block allocation." +fi + +THIRD_DATA_CHUNK_SIZE_B=$(expr ${THIRD_DATA_CHUNK_SIZE_MB} \* 1024 \* 1024) +echo "Allocation size in mb = ${THIRD_DATA_CHUNK_SIZE_MB}" >> ${seqres}.full +echo "Allocation size in bytes = ${THIRD_DATA_CHUNK_SIZE_B}" >> ${seqres}.full + +# +# Do allocation until free space is exhausted. +# +echo "Third allocation." +_set_btrfs_sysfs_attr ${SCRATCH_MNT} allocation/data/chunk_size ${THIRD_DATA_CHUNK_SIZE_B} + +_free_space FREE_SPACE_MB +while [ $FREE_SPACE_MB -gt $THIRD_DATA_CHUNK_SIZE_MB ] +do + _alloc_size "Data" THIRD_DATA_SIZE_MB + _set_btrfs_sysfs_attr ${SCRATCH_MNT} allocation/data/force_chunk_alloc 1 + + _free_space FREE_SPACE_MB +done + +_alloc_size "Data" FOURTH_DATA_SIZE_MB + +# +# Force chunk allocation of system block tyep must fail. +# +echo "Force allocation of system block type must fail." +_set_btrfs_sysfs_attr ${SCRATCH_MNT} allocation/system/force_chunk_alloc 1 2>&1 + +# +# Verification of initial allocation. +# +echo "Verify first allocation." +FIRST_DATA_CHUNK_SIZE_MB=$(expr ${FIRST_DATA_CHUNK_SIZE_B} / 1024 / 1024) +FIRST_METADATA_CHUNK_SIZE_MB=$(expr ${FIRST_METADATA_CHUNK_SIZE_B} / 1024 / 1024) + +# if [[ $(expr ${FIRST_DATA_CHUNK_SIZE_MB} + ${DATA_SIZE_START_MB}) -ne $(expr ${FIRST_DATA_SIZE_MB}) ]]; then +if [[ $(expr ${FIRST_DATA_CHUNK_SIZE_MB} + ${DATA_SIZE_START_MB}) -ne ${FIRST_DATA_SIZE_MB} ]]; then + _fail "tInitial data allocation not correct." +fi + +if [[ $(expr ${FIRST_METADATA_CHUNK_SIZE_MB} + ${METADATA_SIZE_START_MB}) -ne ${FIRST_METADATA_SIZE_MB} ]]; then + _fail "Initial metadata allocation not correct." +fi + +# +# Verification of second allocation. +# +echo "Verify second allocation." +SECOND_DATA_CHUNK_SIZE_MB=$(expr ${SECOND_DATA_CHUNK_SIZE_B} / 1024 / 1024) +SECOND_METADATA_CHUNK_SIZE_MB=$(expr ${SECOND_METADATA_CHUNK_SIZE_B} / 1024 / 1024) + +if [[ ${SECOND_DATA_CHUNK_SIZE_B} -ne ${SECOND_DATA_CHUNK_SIZE_READ_B} ]]; then + _fail "Value written to allocation/data/chunk_size and read value are different." +fi + +if [[ ${SECOND_METADATA_CHUNK_SIZE_B} -ne ${SECOND_METADATA_CHUNK_SIZE_READ_B} ]]; then + _fail "Value written to allocation/metadata/chunk_size and read value are different." +fi + +if [[ $(expr ${SECOND_DATA_CHUNK_SIZE_MB} + ${FIRST_DATA_SIZE_MB}) -ne ${SECOND_DATA_SIZE_MB} ]]; then + _fail "Data allocation after chunk size change not correct." +fi + +if [[ $(expr ${SECOND_METADATA_CHUNK_SIZE_MB} + ${FIRST_METADATA_SIZE_MB}) -ne ${SECOND_METADATA_SIZE_MB} ]]; then + _fail "Metadata allocation after chunk size change not correct." +fi + +# +# Verification of third allocation. +# +echo "Verify third allocation." +if [[ ${FREE_SPACE_MB} -gt ${THIRD_DATA_CHUNK_SIZE_MB} ]]; then + _fail "Free space after allocating over memlimit is too high." +fi + +# The + 1 is required as 1MB is always kept as free space. +if [[ $(expr ${THIRD_DATA_CHUNK_SIZE_MB} + ${THIRD_DATA_SIZE_MB} + 1) -le $(expr ${FOURTH_DATA_SIZE_MB}) ]]; then + _fail "Allocation until out of memory: last memory allocation size is not correct." +fi + +status=0 +exit + diff --git a/tests/btrfs/248.out b/tests/btrfs/248.out new file mode 100644 index 00000000..cac054a6 --- /dev/null +++ b/tests/btrfs/248.out @@ -0,0 +1,12 @@ +QA output created by 248 +Capture default chunk sizes. +First allocation. +Second allocation. +Calculate request size so last memory allocation cannot be completely fullfilled. +Third allocation. +Force allocation of system block type must fail. +_set_btrfs_sysfs_attr cannot write allocation/system/force_chunk_alloc +(see /root/xfstests/results//btrfs/248.full for details) +Verify first allocation. +Verify second allocation. +Verify third allocation.
Summary: Add new testcase for testing the new btrfs sysfs knob to change the chunk size. The new knob uses /sys/fs/btrfs/<UUID>/allocation/<block type>/chunk_size. The test case implements three different cases: - Test allocation with the default chunk size - Test allocation after increasing the chunk size - Test allocation when the free space is smaller than the chunk size. Note: this test needs to force the allocation of space. It uses the /sys/fs/btrfs/<UUID>/allocation/<block type>/force_chunk_alloc knob. Testing: The test has been run with volumes of different sizes. Signed-off-by: Stefan Roesch <shr@fb.com> --- V3: - removed tests for system block type. - added failure case for system block type. - renamed stripe_size to chunk_size V2: - added new functions to common/btrfs and use them in the new test - _require_btrfs_sysfs_attr - Make sure btrfs supports a sysfs setting - _get_btrfs_sysfs_attr - Read sysfs value - _set_btrfs_sysfs_attr - Write sysfs value - create file system of required size with _scratch_mkfs_sized - use shortened error message - Remove last logging message --- common/btrfs | 73 ++++++++++++ tests/btrfs/248 | 284 ++++++++++++++++++++++++++++++++++++++++++++ tests/btrfs/248.out | 12 ++ 3 files changed, 369 insertions(+) create mode 100755 tests/btrfs/248 create mode 100644 tests/btrfs/248.out