btrfs: make nospace_cache related test cases to work with latest v2 cache

In the coming btrfs-progs v5.15 release, mkfs.btrfs will change to
use v2 cache by default.

However nospace_cache mount option will not work with v2 cache, as
it would make v2 cache out of sync with on-disk used space.

So mounting a btrfs with v2 cache using "nospace_cache" will make
btrfs to reject the mount.

There are quite some test cases relying on nospace_cache to prevent
v1 cache to take up data space.

For those test cases, we no longer need the "nospace_cache" mount
option if the filesystem is already using v2 cache. Since v2 cache
is using metadata space, it will no longer take up data space, thus
no extra mount options for those test cases.

By this, we can keep those existing tests to run without problem for
both v1 and v2 cache.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>

12 files changed, 33 insertions, 27 deletions

diff --git a/common/btrfs b/common/btrfs
index 2eab4b2993..cd053d3b28 100644
--- a/common/btrfs
+++ b/common/btrfs
@@ -461,3 +461,15 @@ _require_btrfs_sysfs_fsid()
 	test -f /sys/fs/btrfs/$fsid/devinfo/1/fsid ||\
 		_notrun "Need btrfs sysfs fsid support"
 }
+
+# If test doesn't want v1 cache to take up data space, there's no longer need
+# the "nospace_cache" mount option if the filesystem is already using v2 cache.
+# Since v2 cache is using metadata space, it will no longer take up data space.
+_btrfs_no_v1_cache_opt()
+{
+	if $BTRFS_UTIL_PROG inspect-internal dump-tree $SCRATCH_DEV |\
+	   grep -q "FREE_SPACE_TREE"; then
+		return
+	fi
+	echo -n "-onospace_cache"
+}
diff --git a/tests/btrfs/102 b/tests/btrfs/102
index e5a1b068ae..2a384f3cb7 100755
--- a/tests/btrfs/102
+++ b/tests/btrfs/102
@@ -22,7 +22,7 @@ _scratch_mkfs >>$seqres.full 2>&1
 # Mount our filesystem without space caches enabled so that we do not get any
 # space used from the initial data block group that mkfs creates (space caches
 # used space from data block groups).
-_scratch_mount "-o nospace_cache"
+_scratch_mount $(_btrfs_no_v1_cache_opt)
 
 # Need an fs with at least 2Gb to make sure mkfs.btrfs does not create an fs
 # using mixed block groups (used both for data and metadata). We really need
diff --git a/tests/btrfs/140 b/tests/btrfs/140
index 5a5f828ce0..66efc12659 100755
--- a/tests/btrfs/140
+++ b/tests/btrfs/140
@@ -60,9 +60,8 @@ echo "step 1......mkfs.btrfs" >>$seqres.full
 mkfs_opts="-d raid1 -b 1G"
 _scratch_pool_mkfs $mkfs_opts >>$seqres.full 2>&1
 
-# -o nospace_cache makes sure data is written to the start position of the data
-# chunk
-_scratch_mount -o nospace_cache
+# make sure data is written to the start position of the data chunk
+_scratch_mount $(_btrfs_no_v1_cache_opt)
 
 $XFS_IO_PROG -f -d -c "pwrite -S 0xaa -b 128K 0 128K" "$SCRATCH_MNT/foobar" |\
 	_filter_xfs_io_offset
diff --git a/tests/btrfs/141 b/tests/btrfs/141
index cf0979e9b4..ca164fdc95 100755
--- a/tests/btrfs/141
+++ b/tests/btrfs/141
@@ -59,9 +59,8 @@ _check_minimal_fs_size $(( 1024 * 1024 * 1024 ))
 mkfs_opts="-d raid1 -b 1G"
 _scratch_pool_mkfs $mkfs_opts >>$seqres.full 2>&1
 
-# -o nospace_cache makes sure data is written to the start position of the data
-# chunk
-_scratch_mount -o nospace_cache
+# make sure data is written to the start position of the data chunk
+_scratch_mount $(_btrfs_no_v1_cache_opt)
 
 $XFS_IO_PROG -f -d -c "pwrite -S 0xaa -b 128K 0 128K" "$SCRATCH_MNT/foobar" |\
 	_filter_xfs_io_offset
diff --git a/tests/btrfs/142 b/tests/btrfs/142
index 1318be0fba..c88cace996 100755
--- a/tests/btrfs/142
+++ b/tests/btrfs/142
@@ -37,9 +37,8 @@ _check_minimal_fs_size $(( 1024 * 1024 * 1024 ))
 mkfs_opts="-d raid1 -b 1G"
 _scratch_pool_mkfs $mkfs_opts >>$seqres.full 2>&1
 
-# -o nospace_cache makes sure data is written to the start position of the data
-# chunk
-_scratch_mount -o nospace_cache,nodatasum
+# make sure data is written to the start position of the data chunk
+_scratch_mount -o nodatasum $(_btrfs_no_v1_cache_opt)
 
 $XFS_IO_PROG -f -d -c "pwrite -S 0xaa -b 128K 0 128K" "$SCRATCH_MNT/foobar" |\
 	_filter_xfs_io_offset
diff --git a/tests/btrfs/143 b/tests/btrfs/143
index 6736dcad17..8f086ee875 100755
--- a/tests/btrfs/143
+++ b/tests/btrfs/143
@@ -44,9 +44,8 @@ _check_minimal_fs_size $(( 1024 * 1024 * 1024 ))
 mkfs_opts="-d raid1 -b 1G"
 _scratch_pool_mkfs $mkfs_opts >>$seqres.full 2>&1
 
-# -o nospace_cache makes sure data is written to the start position of the data
-# chunk
-_scratch_mount -o nospace_cache,nodatasum
+# make sure data is written to the start position of the data chunk
+_scratch_mount -o nodatasum $(_btrfs_no_v1_cache_opt)
 
 $XFS_IO_PROG -f -d -c "pwrite -S 0xaa -b 128K 0 128K" "$SCRATCH_MNT/foobar" |\
 	_filter_xfs_io_offset
diff --git a/tests/btrfs/151 b/tests/btrfs/151
index 099e85cc7b..54cd0827d9 100755
--- a/tests/btrfs/151
+++ b/tests/btrfs/151
@@ -31,8 +31,8 @@ _scratch_dev_pool_get 3
 # create raid1 for data
 _scratch_pool_mkfs "-d raid1 -b 1G" >> $seqres.full 2>&1
 
-# we need an empty data chunk, so nospace_cache is required.
-_scratch_mount -onospace_cache
+# we need an empty data chunk, so $(_btrfs_no_v1_cache_opt) is required.
+_scratch_mount $(_btrfs_no_v1_cache_opt)
 
 # if data chunk is empty, 'btrfs device remove' can change raid1 to
 # single.
diff --git a/tests/btrfs/157 b/tests/btrfs/157
index 0cfe3ce565..ae56f3e1bd 100755
--- a/tests/btrfs/157
+++ b/tests/btrfs/157
@@ -64,9 +64,8 @@ _check_minimal_fs_size $(( 1024 * 1024 * 1024 ))
 mkfs_opts="-d raid6 -b 1G"
 _scratch_pool_mkfs $mkfs_opts >>$seqres.full 2>&1
 
-# -o nospace_cache makes sure data is written to the start position of the data
-# chunk
-_scratch_mount -o nospace_cache
+# make sure data is written to the start position of the data chunk
+_scratch_mount $(_btrfs_no_v1_cache_opt)
 
 # [0,64K) is written to stripe 0 and [64K, 128K) is written to stripe 1
 $XFS_IO_PROG -f -d -c "pwrite -S 0xaa 0 128K" -c "fsync" \
@@ -94,7 +93,7 @@ $XFS_IO_PROG -f -d -c "pwrite -S 0xbb $phy1 64K" $devpath1 > /dev/null
 
 # step 3: read foobar to repair the bitrot
 echo "step 3......repair the bitrot" >> $seqres.full
-_scratch_mount -o nospace_cache
+_scratch_mount $(_btrfs_no_v1_cache_opt)
 
 # read the 2nd stripe, i.e. [64K, 128K), to trigger repair
 od -x -j 64K $SCRATCH_MNT/foobar
diff --git a/tests/btrfs/158 b/tests/btrfs/158
index ad374eba8c..aa85835a04 100755
--- a/tests/btrfs/158
+++ b/tests/btrfs/158
@@ -56,9 +56,8 @@ _check_minimal_fs_size $(( 1024 * 1024 * 1024 ))
 mkfs_opts="-d raid6 -b 1G"
 _scratch_pool_mkfs $mkfs_opts >>$seqres.full 2>&1
 
-# -o nospace_cache makes sure data is written to the start position of the data
-# chunk
-_scratch_mount -o nospace_cache
+# make sure data is written to the start position of the data chunk
+_scratch_mount $(_btrfs_no_v1_cache_opt)
 
 # [0,64K) is written to stripe 0 and [64K, 128K) is written to stripe 1
 $XFS_IO_PROG -f -d -c "pwrite -S 0xaa 0 128K" -c "fsync" \
@@ -85,7 +84,7 @@ $XFS_IO_PROG -f -d -c "pwrite -S 0xbb $phy1 64K" $devpath1 > /dev/null
 
 # step 3: scrub filesystem to repair the bitrot
 echo "step 3......repair the bitrot" >> $seqres.full
-_scratch_mount -o nospace_cache
+_scratch_mount $(_btrfs_no_v1_cache_opt)
 
 $BTRFS_UTIL_PROG scrub start -B $SCRATCH_MNT >> $seqres.full 2>&1
 
diff --git a/tests/btrfs/170 b/tests/btrfs/170
index 15382eb316..8700be07c3 100755
--- a/tests/btrfs/170
+++ b/tests/btrfs/170
@@ -29,7 +29,7 @@ _scratch_mkfs_sized $fs_size >>$seqres.full 2>&1
 
 # Mount without space cache so that we can precisely fill all data space and
 # unallocated space later (space cache v1 uses data block groups).
-_scratch_mount "-o nospace_cache"
+_scratch_mount $(_btrfs_no_v1_cache_opt)
 
 # Create our test file and allocate 1826.25Mb of space for it.
 # This will exhaust the existing data block group and all unallocated space on
diff --git a/tests/btrfs/199 b/tests/btrfs/199
index 6aca62f463..2024447c0a 100755
--- a/tests/btrfs/199
+++ b/tests/btrfs/199
@@ -67,7 +67,7 @@ loop_dev=$(_create_loop_device "$loop_file")
 loop_mnt=$tmp/loop_mnt
 
 mkdir -p $loop_mnt
-# - nospace_cache
+# - $(_btrfs_no_v1_cache_opt)
 #   Since v1 cache using DATA space, it can break data extent bytenr
 #   continuousness.
 # - nodatasum
@@ -75,7 +75,7 @@ mkdir -p $loop_mnt
 #   Disabling datasum could reduce the margin caused by metadata to minimal
 # - discard
 #   What we're testing
-_mount -o nospace_cache,nodatasum,discard $loop_dev $loop_mnt
+_mount $(_btrfs_no_v1_cache_opt) -o nodatasum,discard $loop_dev $loop_mnt
 
 # Craft the following extent layout:
 #         |  BG1 |      BG2        |       BG3            |
diff --git a/tests/btrfs/215 b/tests/btrfs/215
index fa622568ad..9ee1a8b399 100755
--- a/tests/btrfs/215
+++ b/tests/btrfs/215
@@ -30,7 +30,7 @@ _require_non_zoned_device $SCRATCH_DEV
 _scratch_mkfs > /dev/null
 # disable freespace inode to ensure file is the first thing in the data
 # blobk group
-_scratch_mount -o nospace_cache
+_scratch_mount $(_btrfs_no_v1_cache_opt)
 
 pagesize=$(get_page_size)
 blocksize=$(_get_block_size $SCRATCH_MNT)