1#! /bin/ksh -p 2# SPDX-License-Identifier: CDDL-1.0 3# 4# CDDL HEADER START 5# 6# The contents of this file are subject to the terms of the 7# Common Development and Distribution License (the "License"). 8# You may not use this file except in compliance with the License. 9# 10# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 11# or https://opensource.org/licenses/CDDL-1.0. 12# See the License for the specific language governing permissions 13# and limitations under the License. 14# 15# When distributing Covered Code, include this CDDL HEADER in each 16# file and include the License file at usr/src/OPENSOLARIS.LICENSE. 17# If applicable, add the following below this CDDL HEADER, with the 18# fields enclosed by brackets "[]" replaced with your own identifying 19# information: Portions Copyright [yyyy] [name of copyright owner] 20# 21# CDDL HEADER END 22# 23 24# 25# Copyright (c) 2024 by Lawrence Livermore National Security, LLC. 26# 27 28. $STF_SUITE/include/libtest.shlib 29. $STF_SUITE/tests/functional/bclone/bclone_common.kshlib 30 31# 32# DESCRIPTION: 33# Verify all cp --reflink modes work with modified file. 34# 35# STRATEGY: 36# 1. Verify "cp --reflink=never|auto|always" behaves as expected. 37# Two different modes of operation are tested. 38# 39# a. zfs_bclone_wait_dirty=0: FICLONE and FICLONERANGE fail with EINVAL 40# when there are dirty blocks which cannot be immediately cloned. 41# This is the default behavior. 42# 43# b. zfs_bclone_wait_dirty=1: FICLONE and FICLONERANGE wait for 44# dirty blocks to be written to disk allowing the clone to succeed. 45# The downside to this is it may be slow which depending on the 46# situtation may defeat the point of making a clone. 47# 48 49verify_runnable "global" 50 51if ! is_linux; then 52 log_unsupported "cp --reflink is a GNU coreutils option" 53fi 54 55function cleanup 56{ 57 datasetexists $TESTPOOL/cp-reflink && \ 58 destroy_dataset $$TESTPOOL/cp-reflink -f 59 log_must restore_tunable BCLONE_WAIT_DIRTY 60} 61 62function verify_copy 63{ 64 src_cksum=$(xxh128digest $1) 65 dst_cksum=$(xxh128digest $2) 66 67 if [[ "$src_cksum" != "$dst_cksum" ]]; then 68 log_must ls -l $CP_TESTDIR 69 log_fail "checksum mismatch ($src_cksum != $dst_cksum)" 70 fi 71} 72 73log_assert "Verify all cp --reflink modes work with modified file" 74 75log_onexit cleanup 76 77SRC_FILE=src.data 78DST_FILE=dst.data 79SRC_SIZE=$((1024 + $RANDOM % 1024)) 80 81# A smaller recordsize is used merely to speed up the test. 82RECORDSIZE=4096 83 84log_must save_tunable BCLONE_WAIT_DIRTY 85 86log_must zfs create -o recordsize=$RECORDSIZE $TESTPOOL/cp-reflink 87CP_TESTDIR=$(get_prop mountpoint $TESTPOOL/cp-reflink) 88 89log_must cd $CP_TESTDIR 90 91# Never wait on dirty blocks (zfs_bclone_wait_dirty=0) 92log_must set_tunable32 BCLONE_WAIT_DIRTY 0 93 94for mode in "never" "auto" "always"; do 95 log_note "Checking 'cp --reflink=$mode'" 96 97 # Create a new file and immediately copy it. 98 log_must dd if=/dev/urandom of=$SRC_FILE bs=$RECORDSIZE count=$SRC_SIZE 99 100 if [[ "$mode" == "always" ]]; then 101 log_mustnot cp --reflink=$mode $SRC_FILE $DST_FILE 102 log_must ls -l $CP_TESTDIR 103 else 104 log_must cp --reflink=$mode $SRC_FILE $DST_FILE 105 verify_copy $SRC_FILE $DST_FILE 106 fi 107 log_must rm -f $DST_FILE 108 109 # Append to an existing file and immediately copy it. 110 sync_pool $TESTPOOL 111 log_must dd if=/dev/urandom of=$SRC_FILE bs=$RECORDSIZE seek=$SRC_SIZE \ 112 count=1 conv=notrunc 113 if [[ "$mode" == "always" ]]; then 114 log_mustnot cp --reflink=$mode $SRC_FILE $DST_FILE 115 log_must ls -l $CP_TESTDIR 116 else 117 log_must cp --reflink=$mode $SRC_FILE $DST_FILE 118 verify_copy $SRC_FILE $DST_FILE 119 fi 120 log_must rm -f $DST_FILE 121 122 # Overwrite a random range of an existing file and immediately copy it. 123 sync_pool $TESTPOOL 124 log_must dd if=/dev/urandom of=$SRC_FILE bs=$((RECORDSIZE / 2)) \ 125 seek=$(($RANDOM % $SRC_SIZE)) count=$((1 + $RANDOM % 16)) conv=notrunc 126 if [[ "$mode" == "always" ]]; then 127 log_mustnot cp --reflink=$mode $SRC_FILE $DST_FILE 128 log_must ls -l $CP_TESTDIR 129 else 130 log_must cp --reflink=$mode $SRC_FILE $DST_FILE 131 verify_copy $SRC_FILE $DST_FILE 132 fi 133 log_must rm -f $SRC_FILE $DST_FILE 134done 135 136# Wait on dirty blocks (zfs_bclone_wait_dirty=1) 137log_must set_tunable32 BCLONE_WAIT_DIRTY 1 138 139for mode in "never" "auto" "always"; do 140 log_note "Checking 'cp --reflink=$mode'" 141 142 # Create a new file and immediately copy it. 143 log_must dd if=/dev/urandom of=$SRC_FILE bs=$RECORDSIZE count=$SRC_SIZE 144 log_must cp --reflink=$mode $SRC_FILE $DST_FILE 145 verify_copy $SRC_FILE $DST_FILE 146 log_must rm -f $DST_FILE 147 148 # Append to an existing file and immediately copy it. 149 log_must dd if=/dev/urandom of=$SRC_FILE bs=$RECORDSIZE seek=$SRC_SIZE \ 150 count=1 conv=notrunc 151 log_must cp --reflink=$mode $SRC_FILE $DST_FILE 152 verify_copy $SRC_FILE $DST_FILE 153 log_must rm -f $DST_FILE 154 155 # Overwrite a random range of an existing file and immediately copy it. 156 log_must dd if=/dev/urandom of=$SRC_FILE bs=$((RECORDSIZE / 2)) \ 157 seek=$(($RANDOM % $SRC_SIZE)) count=$((1 + $RANDOM % 16)) conv=notrunc 158 log_must cp --reflink=$mode $SRC_FILE $DST_FILE 159 verify_copy $SRC_FILE $DST_FILE 160 log_must rm -f $SRC_FILE $DST_FILE 161done 162 163log_pass 164