##/bin/bash # SPDX-License-Identifier: GPL-2.0 # Copyright (c) 2015 Facebook, Inc. All Rights Reserved. # # common functions for setting up and tearing down a dm log-writes device _require_log_writes() { [ -z "$LOGWRITES_DEV" -o ! -b "$LOGWRITES_DEV" ] && \ _notrun "This test requires a valid \$LOGWRITES_DEV" _exclude_scratch_mount_option dax _require_dm_target log-writes _require_test_program "log-writes/replay-log" } # Starting from v4.15-rc1, DAX support was added to dm-log-writes, but note # that it doesn't track the data that we write via the mmap(), so we can't do # any data integrity checking. We can only verify that the metadata writes for # the page faults happened, e.g. when mmap(2) with MAP_SYNC flag. # # Introduce a new helper to check if dm-log-writes target supports DAX # explicitly. But this is considered as a temporary workaround, we want to move # all the DAX check back to _require_log_writes when dm-log-writes gains full # DAX support and remove this helper. # # Check if dax mount options are supported # $1 can be either 'dax=always' or 'dax' # dax=always # Check for the new dax options (dax=inode, dax=always or dax=never) # by passing "dax=always". # dax # Check for the old dax or new dax=always by passing "dax". # This only accepts 'dax=always' because dax=always, dax=inode and # dax=never are always supported together. So if the other options are # required checking for 'dax=always' indicates support for the other 2. _require_log_writes_dax_mountopt() { [ -z "$LOGWRITES_DEV" -o ! -b "$LOGWRITES_DEV" ] && \ _notrun "This test requires a valid \$LOGWRITES_DEV" _require_dm_target log-writes _require_test_program "log-writes/replay-log" local ret=0 local mountopt=$1 _log_writes_init $SCRATCH_DEV _log_writes_mkfs > /dev/null 2>&1 _log_writes_mount "-o $mountopt" > /dev/null 2>&1 # Check options to be sure. # XFS ignores dax option(or changes it to dax=never) # and goes on if dev underneath does not support dax. _fs_options $LOGWRITES_DMDEV | egrep -q "dax(=always|,|$)" ret=$? _log_writes_cleanup if [ $ret -ne 0 ]; then _notrun "$LOGWRITES_DMDEV $FSTYP does not support -o $mountopt" fi } _log_writes_init() { blkdev=$1 [ -z "$blkdev" ] && _fail \ "block dev must be specified for _log_writes_init" local BLK_DEV_SIZE=`blockdev --getsz $blkdev` LOGWRITES_NAME=logwrites-test LOGWRITES_DMDEV=/dev/mapper/$LOGWRITES_NAME LOGWRITES_TABLE="0 $BLK_DEV_SIZE log-writes $blkdev $LOGWRITES_DEV" _dmsetup_create $LOGWRITES_NAME --table "$LOGWRITES_TABLE" || \ _fail "failed to create log-writes device" } _log_writes_mark() { [ $# -ne 1 ] && _fail "_log_writes_mark takes one argument" $DMSETUP_PROG message $LOGWRITES_NAME 0 mark $1 } _log_writes_mkfs() { _scratch_options mkfs _mkfs_dev $SCRATCH_OPTIONS $@ $LOGWRITES_DMDEV _log_writes_mark mkfs } _log_writes_mount() { _scratch_options mount $MOUNT_PROG -t $FSTYP `_common_dev_mount_options $*` $SCRATCH_OPTIONS \ $LOGWRITES_DMDEV $SCRATCH_MNT } _log_writes_unmount() { $UMOUNT_PROG $SCRATCH_MNT } # _log_writes_replay_log # # This replays the log contained on $LOGWRITES_DEV onto blkdev upto the # mark passed in. _log_writes_replay_log() { _mark=$1 _blkdev=$2 [ -z "$_blkdev" ] && _fail \ "block dev must be specified for _log_writes_replay_log" $here/src/log-writes/replay-log --log $LOGWRITES_DEV --find \ --end-mark $_mark >> $seqres.full 2>&1 [ $? -ne 0 ] && _fail "mark '$_mark' does not exist" $here/src/log-writes/replay-log --log $LOGWRITES_DEV --replay $_blkdev \ --end-mark $_mark >> $seqres.full 2>&1 [ $? -ne 0 ] && _fail "replay failed" } _log_writes_remove() { _dmsetup_remove $LOGWRITES_NAME } _log_writes_cleanup() { $UMOUNT_PROG $SCRATCH_MNT > /dev/null 2>&1 _log_writes_remove } # Convert log writes mark to entry number # Result entry number is output to stdout, could be empty if not found _log_writes_mark_to_entry_number() { local mark=$1 local ret [ -z "$mark" ] && _fatal \ "mark must be given for _log_writes_mark_to_entry_number" ret=$($here/src/log-writes/replay-log --find --log $LOGWRITES_DEV \ --end-mark $mark 2> /dev/null) [ -z "$ret" ] && return ret=$(echo "$ret" | cut -f1 -d\@) echo "mark $mark has entry number $ret" >> $seqres.full echo "$ret" } # Find next fua write entry number # Result entry number is output to stdout, could be empty if not found _log_writes_find_next_fua() { local start_entry=$1 local ret [ -z "$start_entry" ] && start_entry=0 ret=$($here/src/log-writes/replay-log --find --log $LOGWRITES_DEV \ --next-fua --start-entry $start_entry 2> /dev/null) [ -z "$ret" ] && return # Result should be something like "1024@offset" where 1024 is the # entry number we need ret=$(echo "$ret" | cut -f1 -d\@) echo "next fua is entry number $ret" >> $seqres.full echo "$ret" } # Replay log range to specified entry # $1: End entry. The entry with this number *WILL* be replayed _log_writes_replay_log_range() { local end=$1 local blkdev=$2 [ -z "$end" ] && _fail \ "end entry must be specified for _log_writes_replay_log_range" [ -z "$blkdev" ] && _fail \ "block dev must be specified for _log_writes_replay_log_range" # To ensure we replay the last entry, # we need to manually increase the end entry number to ensure # it's played echo "=== replay to $end ===" >> $seqres.full $here/src/log-writes/replay-log --log $LOGWRITES_DEV \ --replay $blkdev --limit $(($end + 1)) \ >> $seqres.full 2>&1 [ $? -ne 0 ] && _fail "replay failed" }