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#! /bin/ksh -p
#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License (the "License").
# You may not use this file except in compliance with the License.
#
# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
# or https://opensource.org/licenses/CDDL-1.0.
# See the License for the specific language governing permissions
# and limitations under the License.
#
# When distributing Covered Code, include this CDDL HEADER in each
# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
# If applicable, add the following below this CDDL HEADER, with the
# fields enclosed by brackets "[]" replaced with your own identifying
# information: Portions Copyright [yyyy] [name of copyright owner]
#
# CDDL HEADER END
#
#
# Copyright (c) 2024 by Lawrence Livermore National Security, LLC.
#
. $STF_SUITE/include/libtest.shlib
. $STF_SUITE/tests/functional/bclone/bclone_common.kshlib
#
# DESCRIPTION:
# Verify all cp --reflink modes work with modified file.
#
# STRATEGY:
# 1. Verify "cp --reflink=never|auto|always" behaves as expected.
# Two different modes of operation are tested.
#
# a. zfs_bclone_wait_dirty=0: FICLONE and FICLONERANGE fail with EINVAL
# when there are dirty blocks which cannot be immediately cloned.
# This is the default behavior.
#
# b. zfs_bclone_wait_dirty=1: FICLONE and FICLONERANGE wait for
# dirty blocks to be written to disk allowing the clone to succeed.
# The downside to this is it may be slow which depending on the
# situtation may defeat the point of making a clone.
#
verify_runnable "global"
verify_block_cloning
if ! is_linux; then
log_unsupported "cp --reflink is a GNU coreutils option"
fi
function cleanup
{
datasetexists $TESTPOOL/cp-reflink && \
destroy_dataset $$TESTPOOL/cp-reflink -f
log_must set_tunable32 BCLONE_WAIT_DIRTY 0
}
function verify_copy
{
src_cksum=$(sha256digest $1)
dst_cksum=$(sha256digest $2)
if [[ "$src_cksum" != "$dst_cksum" ]]; then
log_must ls -l $CP_TESTDIR
log_fail "checksum mismatch ($src_cksum != $dst_cksum)"
fi
}
log_assert "Verify all cp --reflink modes work with modified file"
log_onexit cleanup
SRC_FILE=src.data
DST_FILE=dst.data
SRC_SIZE=$((1024 + $RANDOM % 1024))
# A smaller recordsize is used merely to speed up the test.
RECORDSIZE=4096
log_must zfs create -o recordsize=$RECORDSIZE $TESTPOOL/cp-reflink
CP_TESTDIR=$(get_prop mountpoint $TESTPOOL/cp-reflink)
log_must cd $CP_TESTDIR
# Never wait on dirty blocks (zfs_bclone_wait_dirty=0)
log_must set_tunable32 BCLONE_WAIT_DIRTY 0
for mode in "never" "auto" "always"; do
log_note "Checking 'cp --reflink=$mode'"
# Create a new file and immediately copy it.
log_must dd if=/dev/urandom of=$SRC_FILE bs=$RECORDSIZE count=$SRC_SIZE
if [[ "$mode" == "always" ]]; then
log_mustnot cp --reflink=$mode $SRC_FILE $DST_FILE
log_must ls -l $CP_TESTDIR
else
log_must cp --reflink=$mode $SRC_FILE $DST_FILE
verify_copy $SRC_FILE $DST_FILE
fi
log_must rm -f $DST_FILE
# Append to an existing file and immediately copy it.
sync_pool $TESTPOOL
log_must dd if=/dev/urandom of=$SRC_FILE bs=$RECORDSIZE seek=$SRC_SIZE \
count=1 conv=notrunc
if [[ "$mode" == "always" ]]; then
log_mustnot cp --reflink=$mode $SRC_FILE $DST_FILE
log_must ls -l $CP_TESTDIR
else
log_must cp --reflink=$mode $SRC_FILE $DST_FILE
verify_copy $SRC_FILE $DST_FILE
fi
log_must rm -f $DST_FILE
# Overwrite a random range of an existing file and immediately copy it.
sync_pool $TESTPOOL
log_must dd if=/dev/urandom of=$SRC_FILE bs=$((RECORDSIZE / 2)) \
seek=$(($RANDOM % $SRC_SIZE)) count=$((1 + $RANDOM % 16)) conv=notrunc
if [[ "$mode" == "always" ]]; then
log_mustnot cp --reflink=$mode $SRC_FILE $DST_FILE
log_must ls -l $CP_TESTDIR
else
log_must cp --reflink=$mode $SRC_FILE $DST_FILE
verify_copy $SRC_FILE $DST_FILE
fi
log_must rm -f $SRC_FILE $DST_FILE
done
# Wait on dirty blocks (zfs_bclone_wait_dirty=1)
log_must set_tunable32 BCLONE_WAIT_DIRTY 1
for mode in "never" "auto" "always"; do
log_note "Checking 'cp --reflink=$mode'"
# Create a new file and immediately copy it.
log_must dd if=/dev/urandom of=$SRC_FILE bs=$RECORDSIZE count=$SRC_SIZE
log_must cp --reflink=$mode $SRC_FILE $DST_FILE
verify_copy $SRC_FILE $DST_FILE
log_must rm -f $DST_FILE
# Append to an existing file and immediately copy it.
log_must dd if=/dev/urandom of=$SRC_FILE bs=$RECORDSIZE seek=$SRC_SIZE \
count=1 conv=notrunc
log_must cp --reflink=$mode $SRC_FILE $DST_FILE
verify_copy $SRC_FILE $DST_FILE
log_must rm -f $DST_FILE
# Overwrite a random range of an existing file and immediately copy it.
log_must dd if=/dev/urandom of=$SRC_FILE bs=$((RECORDSIZE / 2)) \
seek=$(($RANDOM % $SRC_SIZE)) count=$((1 + $RANDOM % 16)) conv=notrunc
log_must cp --reflink=$mode $SRC_FILE $DST_FILE
verify_copy $SRC_FILE $DST_FILE
log_must rm -f $SRC_FILE $DST_FILE
done
log_pass
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