| #! /bin/bash |
| # SPDX-License-Identifier: GPL-2.0 |
| # Copyright (c) 2017 Intel Corporation. All Rights Reserved. |
| # |
| # FS QA Test No. 470 |
| # |
| # Use dm-log-writes to verify that MAP_SYNC actually syncs metadata during |
| # page faults. |
| # |
| . ./common/preamble |
| _begin_fstest auto quick dax mmap |
| |
| # Override the default cleanup function. |
| _cleanup() |
| { |
| cd / |
| _log_writes_cleanup |
| rm -f $tmp.* |
| } |
| |
| # Import common functions. |
| . ./common/filter |
| . ./common/dmlogwrites |
| |
| _require_scratch |
| _require_no_logdev |
| _require_log_writes_dax_mountopt "dax" |
| _require_xfs_io_command "mmap" "-S" |
| _require_xfs_io_command "log_writes" |
| _require_command "$BLKDISCARD_PROG" blkdiscard |
| |
| MAPPED_LEN=$((512 * 1024 * 1024)) # 512 MiB |
| LEN=$((1024 * 1024)) # 1 MiB |
| |
| _log_writes_init $SCRATCH_DEV $MAPPED_LEN |
| _log_writes_mkfs >> $seqres.full 2>&1 |
| _log_writes_mount -o dax |
| |
| $XFS_IO_PROG -t -c "truncate $LEN" -c "mmap -S 0 $LEN" -c "mwrite 0 $LEN" \ |
| -c "log_writes -d $LOGWRITES_NAME -m preunmap" \ |
| -f $SCRATCH_MNT/test |
| |
| # Unmount the scratch dir and tear down the log writes target |
| _log_writes_unmount |
| _log_writes_remove |
| _check_scratch_fs |
| |
| # Forcibly zero the mapped range of scratch device and destroy |
| # previous filesystem so we can be sure our rebuild works. |
| # Note that blkdiscard -z will fall back to writing buffers of zeroes |
| # if scratch device doesn't support write zeroes operation(i.e. |
| # REQ_OP_WRITE_ZEROES). |
| $BLKDISCARD_PROG -fzl $MAPPED_LEN $SCRATCH_DEV >> $seqres.full 2>&1 |
| _scratch_mkfs >> $seqres.full 2>&1 |
| |
| # check pre-unmap state |
| _log_writes_replay_log preunmap $SCRATCH_DEV |
| _scratch_mount |
| |
| # We should see $SCRATCH_MNT/test as having 1 MiB in block allocations |
| du -sh $SCRATCH_MNT/test | _filter_scratch | _filter_spaces |
| |
| status=0 |
| exit |
