[PATCH 0/9] Lowmem mode fsck fixes with fsck-tests framework update

[PATCH 0/9] Lowmem mode fsck fixes with fsck-tests framework update

[Qu Wenruo]

Patches can be fetch from github:
https://github.com/adam900710/btrfs-progs/tree/lowmem_fixes

Although there are near 10 patches, but they are all small.
No need to be scared. :)

Thanks for reports from Chris Murphy and Christoph Anton Mitterer,
several new bugs are exposed for lowmem mode fsck.

And one original mode bug, not fixed in this patchset.
The original mode bug is caused by fsck/006, which repairs doesn't
fix backrefs of a data extent, which lowmem mode detects it correctly.

1) Block group used space false alert
   If a BLOCK_GROUP_ITEM or its first EXTENT/METADATA_ITEM is located at
   the first slot of a leaf, search_slot() used by lowmem mode can
   point to previous leaf, with path->slots[0] beyond valid leaf slots.

   This makes us to read out uninitialized data, and can abort block
   group used space check loop, causing a false alert.

   Fix it with a test case image inside fsck-tests/020/extent-ref-cases
   Reported by Christoph.

2) Partly written prealloc extent false alert
   If a prealloc extent gets partily written, lowmem mode will report
   prealloc extent shouldn't have csum.

   Lowmem mode passed wrong variable to csum checking code, causing it
   to check the whole range of the prealloc extent, making the bug
   happens.

   Fix it with a test case inside fsck-tests/020/extent-ref-cases.
   Reported by Chirs Murphy And Christoph.

3) Extent item size false alert.
   Under certain case, btrfs lowmem mode check reports data backref
   lost.
   It's because newly introduced extent item size check aborts normal
   check routine.

   It can happen if a data/metadata extent item has no inline ref.

   Fix it, test case already submitted before and merged, but due to
   fsck-tests framework bugs, it never get called for lowmem mode.

4) fsck-tests Lowmem mode override fixes
   Allow lowmem mode override to get called for all tests, and allow
   them all to pass lowmem mode except fsck-tests/006, which is a
   original repair mode bug.


Lu Fengqi (1):
  btrfs-progs: fsck: Fix lowmem mode override to allow it skip repair
    work

Qu Wenruo (8):
  btrfs-progs: lowmem check: Fix wrong block group check when search
    slot points to slot beyong leaf
  btrfs-progs: fsck-test: Add test image for lowmem mode block group
    false alert
  btrfs-progs: fsck: Output verbose error when fsck found a bug
  btrfs-progs: lowmem check: Fix false alert in checking data extent
    pointing to prealloc extent
  btrfs-progs: lowmem check: Fix extent item size false alert
  btrfs-progs: tests: Move fsck-tests/015 to fuzz tests
  btrfs-progs: fsck-tests: Make 013 compatible with lowmem mode
  btrfs-progs: fsck-tests: Add new test case for partly written prealloc
    extent

 cmds-check.c                                       |  80 ++++++++++++++++-----
 tests/common                                       |   8 +--
 tests/common.local                                 |   2 +-
 tests/fsck-tests/013-extent-tree-rebuild/test.sh   |   2 +-
 .../block_group_item_false_alert.raw.xz            | Bin 0 -> 47792 bytes
 tests/fsck-tests/020-extent-ref-cases/test.sh      |  30 ++++++--
 .../images}/bko-97171-btrfs-image.raw.txt          |   0
 .../images}/bko-97171-btrfs-image.raw.xz           | Bin
 8 files changed, 95 insertions(+), 27 deletions(-)
 create mode 100644 tests/fsck-tests/020-extent-ref-cases/block_group_item_false_alert.raw.xz
 rename tests/{fsck-tests/015-check-bad-memory-access => fuzz-tests/images}/bko-97171-btrfs-image.raw.txt (100%)
 rename tests/{fsck-tests/015-check-bad-memory-access => fuzz-tests/images}/bko-97171-btrfs-image.raw.xz (100%)

-- 
2.11.0

[PATCH 1/9] btrfs-progs: lowmem check: Fix wrong block group check when search slot points to slot beyong leaf

[Qu Wenruo]

Since btrfs_search_slot() can points to the slot which is beyond the
leaves' capacity, in the following case, btrfs lowmem mode check will
skip the block group and report false alert:

leaf 29405184 items 37 free space 1273 generation 11 owner 2
...
        item 36 key (77594624 EXTENT_ITEM 2097152)
                extent refs 1 gen 8 flags DATA
                extent data backref root 5 objectid 265 offset 0 count 1
leaf 29409280 items 43 free space 670 generation 11 owner 2
        item 0 key (96468992 EXTENT_ITEM 2097152)
                extent refs 1 gen 8 flags DATA
                extent data backref root 5 objectid 274 offset 0 count 1
        item 1 key (96468992 BLOCK_GROUP_ITEM 33554432)
                block group used 2265088 chunk_objectid 256 flags DATA

When checking block group item, we will search key(96468992 0 0) to
start from the first item in the block group.

While search_slot() will point to leaf 29405184, slot 37 which is beyond
leaf capacity.

And when reading key from slot 37, uninitialized data can be read out
and cause us to exit block group item check, leading to false alert.

Fix it by checking path.slot[0] before reading out the key.

Reported-by: Christoph Anton Mitterer <calestyo@scientia.net>
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
---
 cmds-check.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/cmds-check.c b/cmds-check.c
index 1dba2985..c39392b7 100644
--- a/cmds-check.c
+++ b/cmds-check.c
@@ -10961,6 +10961,11 @@ static int check_block_group_item(struct btrfs_fs_info *fs_info,
 	/* Iterate extent tree to account used space */
 	while (1) {
 		leaf = path.nodes[0];
+
+		/* Search slot can point to the last item beyond leaf nritems */
+		if (path.slots[0] >= btrfs_header_nritems(leaf))
+			goto next;
+
 		btrfs_item_key_to_cpu(leaf, &extent_key, path.slots[0]);
 		if (extent_key.objectid >= bg_key.objectid + bg_key.offset)
 			break;
-- 
2.11.0

[PATCH 2/9] btrfs-progs: fsck-test: Add test image for lowmem mode block group false alert

[Qu Wenruo]

Add a minimal image which can reproduce the block group used space
false alert for lowmem mode fsck.

Reported-by: Christoph Anton Mitterer <calestyo@scientia.net>
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
---
 .../block_group_item_false_alert.raw.xz                 | Bin 0 -> 47792 bytes
 tests/fsck-tests/020-extent-ref-cases/test.sh           |  15 +++++++++++----
 2 files changed, 11 insertions(+), 4 deletions(-)
 create mode 100644 tests/fsck-tests/020-extent-ref-cases/block_group_item_false_alert.raw.xz

diff --git a/tests/fsck-tests/020-extent-ref-cases/block_group_item_false_alert.raw.xz b/tests/fsck-tests/020-extent-ref-cases/block_group_item_false_alert.raw.xz
new file mode 100644
index 0000000000000000000000000000000000000000..559c3fa9e8491f3ce1f424d1baef29853e8fb889
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/fsck-tests/020-extent-ref-cases/test.sh b/tests/fsck-tests/020-extent-ref-cases/test.sh
index c2b6a006..5dc5e55d 100755
--- a/tests/fsck-tests/020-extent-ref-cases/test.sh
+++ b/tests/fsck-tests/020-extent-ref-cases/test.sh
@@ -8,16 +8,23 @@
 # * shared_data_ref
 # * no_inline_ref (a extent item without inline ref)
 # * no_skinny_ref
+#
+# Special check for lowmem regression
+# * block_group_item_false_alert
+#   Containing a block group and its first extent at
+#   the beginning of leaf.
+#   Which caused false alert for lowmem mode.
 
 source $TOP/tests/common
 
 check_prereq btrfs
 
-for img in *.img
+for img in *.img *.raw.xz
 do
 	image=$(extract_image $img)
-	run_check_stdout $TOP/btrfs check "$image" 2>&1 |
-		grep -q "Errors found in extent allocation tree or chunk allocation" &&
-		_fail "unexpected error occurred when checking $img"
+
+	# Since the return value bug is already fixed, we don't need
+	# the old grep hack to detect bug.
+	run_check $TOP/btrfs check "$image"
 	rm -f "$image"
 done
-- 
2.11.0

[PATCH 3/9] btrfs-progs: fsck: Output verbose error when fsck found a bug

[Qu Wenruo]

Although we output error like "errors found in extent allocation tree or
chunk allocation", but we lacks such output for other trees, but leaving
the final "found error is %d" to catch the last return value(and
sometime it's cleared)

This patch adds extra error message for top level error path, and modify
the last "found error is %d" to "error(s) found" or "no error found".

Cc: Christoph Anton Mitterer <calestyo@scientia.net>
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
---
 cmds-check.c | 43 +++++++++++++++++++++++++++++++++----------
 1 file changed, 33 insertions(+), 10 deletions(-)

diff --git a/cmds-check.c b/cmds-check.c
index c39392b7..f158daf9 100644
--- a/cmds-check.c
+++ b/cmds-check.c
@@ -12913,8 +12913,10 @@ int cmd_check(int argc, char **argv)
 
 	ret = repair_root_items(info);
 	err |= !!ret;
-	if (ret < 0)
+	if (ret < 0) {
+		error("failed to repair root items: %s", strerror(-ret));
 		goto close_out;
+	}
 	if (repair) {
 		fprintf(stderr, "Fixed %d roots.\n", ret);
 		ret = 0;
@@ -12937,8 +12939,13 @@ int cmd_check(int argc, char **argv)
 	}
 	ret = check_space_cache(root);
 	err |= !!ret;
-	if (ret)
+	if (ret) {
+		if (btrfs_fs_compat_ro(info, FREE_SPACE_TREE))
+			error("errors found in free space tree");
+		else
+			error("errors found in free space cache");
 		goto out;
+	}
 
 	/*
 	 * We used to have to have these hole extents in between our real
@@ -12954,22 +12961,28 @@ int cmd_check(int argc, char **argv)
 	else
 		ret = check_fs_roots(root, &root_cache);
 	err |= !!ret;
-	if (ret)
+	if (ret) {
+		error("errors found in fs roots");
 		goto out;
+	}
 
 	fprintf(stderr, "checking csums\n");
 	ret = check_csums(root);
 	err |= !!ret;
-	if (ret)
+	if (ret) {
+		error("errors found in csum tree");
 		goto out;
+	}
 
 	fprintf(stderr, "checking root refs\n");
 	/* For low memory mode, check_fs_roots_v2 handles root refs */
 	if (check_mode != CHECK_MODE_LOWMEM) {
 		ret = check_root_refs(root, &root_cache);
 		err |= !!ret;
-		if (ret)
+		if (ret) {
+			error("errors found in root refs");
 			goto out;
+		}
 	}
 
 	while (repair && !list_empty(&root->fs_info->recow_ebs)) {
@@ -12980,8 +12993,10 @@ int cmd_check(int argc, char **argv)
 		list_del_init(&eb->recow);
 		ret = recow_extent_buffer(root, eb);
 		err |= !!ret;
-		if (ret)
+		if (ret) {
+			error("fails to fix transid errors");
 			break;
+		}
 	}
 
 	while (!list_empty(&delete_items)) {
@@ -13000,13 +13015,17 @@ int cmd_check(int argc, char **argv)
 		fprintf(stderr, "checking quota groups\n");
 		ret = qgroup_verify_all(info);
 		err |= !!ret;
-		if (ret)
+		if (ret) {
+			error("failed to check quota groups");
 			goto out;
+		}
 		report_qgroups(0);
 		ret = repair_qgroups(info, &qgroups_repaired);
 		err |= !!ret;
-		if (err)
+		if (err) {
+			error("failed to repair quota groups");
 			goto out;
+		}
 		ret = 0;
 	}
 
@@ -13027,8 +13046,12 @@ out:
 		       "backup data and re-format the FS. *\n\n");
 		err |= 1;
 	}
-	printf("found %llu bytes used err is %d\n",
-	       (unsigned long long)bytes_used, ret);
+	printf("found %llu bytes used, ",
+	       (unsigned long long)bytes_used);
+	if (err)
+		printf("error(s) found\n");
+	else
+		printf("no error found\n");
 	printf("total csum bytes: %llu\n",(unsigned long long)total_csum_bytes);
 	printf("total tree bytes: %llu\n",
 	       (unsigned long long)total_btree_bytes);
-- 
2.11.0

[PATCH 4/9] btrfs-progs: lowmem check: Fix false alert in checking data extent pointing to prealloc extent

[Qu Wenruo]

Btrfs lowmem check can report false csum error like:
ERROR: root 5 EXTENT_DATA[257 0] datasum missing
ERROR: root 5 EXTENT_DATA[257 4096] prealloc shouldn't have datasum

This is because lowmem check code always compare the found csum size
with the whole extent which data extents points to.

Normally it's OK, but when prealloc extent is written, or reflink is
done, data extent can points to part of a larger extent, making the csum
check wrong.

The fix changes the csum check part to the data extent size, other than
the disk_bytenr/disk_num_bytes which points to a larger extent.

Reported-by: Chris Murphy <chris@colorremedies.com>
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
---
 cmds-check.c | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/cmds-check.c b/cmds-check.c
index f158daf9..fd176b76 100644
--- a/cmds-check.c
+++ b/cmds-check.c
@@ -4695,6 +4695,7 @@ static int check_file_extent(struct btrfs_root *root, struct btrfs_key *fkey,
 	u64 disk_bytenr;
 	u64 disk_num_bytes;
 	u64 extent_num_bytes;
+	u64 extent_offset;
 	u64 found;
 	unsigned int extent_type;
 	unsigned int is_hole;
@@ -4731,17 +4732,28 @@ static int check_file_extent(struct btrfs_root *root, struct btrfs_key *fkey,
 	disk_bytenr = btrfs_file_extent_disk_bytenr(node, fi);
 	disk_num_bytes = btrfs_file_extent_disk_num_bytes(node, fi);
 	extent_num_bytes = btrfs_file_extent_num_bytes(node, fi);
+	extent_offset = btrfs_file_extent_offset(node, fi);
 	is_hole = (disk_bytenr == 0) && (disk_num_bytes == 0);
 
-	/* Check EXTENT_DATA datasum */
-	ret = count_csum_range(root, disk_bytenr, disk_num_bytes, &found);
+	/*
+	 * Check EXTENT_DATA datasum
+	 *
+	 * We should only check the range we're referring to, as it's possible
+	 * that part of prealloc extent has been written, and has csum:
+	 *
+	 * |<------- Original large preallocate extent A -------->|
+	 * |<- Prealloc File Extent ->|<- Regular Extent ->|
+	 *	No csum				Has csum
+	 */
+	ret = count_csum_range(root, disk_bytenr + extent_offset,
+			       extent_num_bytes, &found);
 	if (found > 0 && nodatasum) {
 		err |= ODD_CSUM_ITEM;
 		error("root %llu EXTENT_DATA[%llu %llu] nodatasum shouldn't have datasum",
 		      root->objectid, fkey->objectid, fkey->offset);
 	} else if (extent_type == BTRFS_FILE_EXTENT_REG && !nodatasum &&
 		   !is_hole &&
-		   (ret < 0 || found == 0 || found < disk_num_bytes)) {
+		   (ret < 0 || found == 0 || found < extent_num_bytes)) {
 		err |= CSUM_ITEM_MISSING;
 		error("root %llu EXTENT_DATA[%llu %llu] datasum missing",
 		      root->objectid, fkey->objectid, fkey->offset);
-- 
2.11.0

[PATCH 5/9] btrfs-progs: lowmem check: Fix extent item size false alert

[Qu Wenruo]

If one extent item has no inline ref, btrfs lowmem mode check can give
false alert without outputting any error message.

The problem is lowmem mode always assume that extent item has inline
refs, and when it encounters such case it flags the extent item has
wrong size, but doesn't output the error message.

Although we already have such image submitted, at the commit time due to
another bug in cmds-check return value, it doesn't detect it until that
bug is fixed.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
---
 cmds-check.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/cmds-check.c b/cmds-check.c
index fd176b76..802d179f 100644
--- a/cmds-check.c
+++ b/cmds-check.c
@@ -10730,13 +10730,20 @@ static int check_extent_item(struct btrfs_fs_info *fs_info,
 	}
 	end = (unsigned long)ei + item_size;
 
-	if (ptr >= end) {
+next:
+	/* Reached extent item end normally */
+	if (ptr == end)
+		goto out;
+
+	/* Beyond extent item end, wrong item size */
+	if (ptr > end) {
 		err |= ITEM_SIZE_MISMATCH;
+		error("extent item at bytenr %llu slot %d has wrong size",
+			eb->start, slot);
 		goto out;
 	}
 
 	/* Now check every backref in this extent item */
-next:
 	iref = (struct btrfs_extent_inline_ref *)ptr;
 	type = btrfs_extent_inline_ref_type(eb, iref);
 	offset = btrfs_extent_inline_ref_offset(eb, iref);
@@ -10773,8 +10780,7 @@ next:
 	}
 
 	ptr += btrfs_extent_inline_ref_size(type);
-	if (ptr < end)
-		goto next;
+	goto next;
 
 out:
 	return err;
-- 
2.11.0

[PATCH 6/9] btrfs-progs: tests: Move fsck-tests/015 to fuzz tests

[Qu Wenruo]

The test case fsck-tests/015-check-bad-memory-access can't be repair by
btrfs check, and it's a fortunate bug makes original mode to forget the
error code from extent tree, making original mode pass it.

So fuzz-tests is more suitable for it.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
---
 .../images}/bko-97171-btrfs-image.raw.txt                   |   0
 .../images}/bko-97171-btrfs-image.raw.xz                    | Bin
 2 files changed, 0 insertions(+), 0 deletions(-)
 rename tests/{fsck-tests/015-check-bad-memory-access => fuzz-tests/images}/bko-97171-btrfs-image.raw.txt (100%)
 rename tests/{fsck-tests/015-check-bad-memory-access => fuzz-tests/images}/bko-97171-btrfs-image.raw.xz (100%)

diff --git a/tests/fsck-tests/015-check-bad-memory-access/bko-97171-btrfs-image.raw.txt b/tests/fuzz-tests/images/bko-97171-btrfs-image.raw.txt
similarity index 100%
rename from tests/fsck-tests/015-check-bad-memory-access/bko-97171-btrfs-image.raw.txt
rename to tests/fuzz-tests/images/bko-97171-btrfs-image.raw.txt
diff --git a/tests/fsck-tests/015-check-bad-memory-access/bko-97171-btrfs-image.raw.xz b/tests/fuzz-tests/images/bko-97171-btrfs-image.raw.xz
similarity index 100%
rename from tests/fsck-tests/015-check-bad-memory-access/bko-97171-btrfs-image.raw.xz
rename to tests/fuzz-tests/images/bko-97171-btrfs-image.raw.xz
-- 
2.11.0

[PATCH 7/9] btrfs-progs: fsck-tests: Make 013 compatible with lowmem mode

[Qu Wenruo]

fsck-tests/013-extent-tree-rebuild uses "--init-extent-tree", which
implies "--repair".

But the test script doesn't specify "--repair" for lowmem mode test to
detect it.

Add it so lowmem mode test can be happy with it.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
---
 tests/fsck-tests/013-extent-tree-rebuild/test.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/fsck-tests/013-extent-tree-rebuild/test.sh b/tests/fsck-tests/013-extent-tree-rebuild/test.sh
index 37bdcd9c..08c1e50e 100755
--- a/tests/fsck-tests/013-extent-tree-rebuild/test.sh
+++ b/tests/fsck-tests/013-extent-tree-rebuild/test.sh
@@ -36,7 +36,7 @@ test_extent_tree_rebuild()
 
 	$SUDO_HELPER $TOP/btrfs check $TEST_DEV >& /dev/null && \
 			_fail "btrfs check should detect failure"
-	run_check $SUDO_HELPER $TOP/btrfs check --init-extent-tree $TEST_DEV
+	run_check $SUDO_HELPER $TOP/btrfs check --repair --init-extent-tree $TEST_DEV
 	run_check $SUDO_HELPER $TOP/btrfs check $TEST_DEV
 }
 
-- 
2.11.0

[PATCH 8/8] btrfs-progs: fsck: Fix lowmem mode override to allow it skip repair work

[Qu Wenruo]

From: Lu Fengqi <lufq.fnst@cn.fujitsu.com>

Current common.local doesn't handle lowmem mode well.
It passes "--mode=lowmem" alone with "--repair", making it unable to
check lowmem mode.

It's caused by the following bugs:

1) Wrong variable in test/common.local
   We should check TEST_ARGS_CHECK, not TEST_CHECK, which is not defined
   so we never return 1.

2) Wrong parameter passed to _cmd_spec() in test/common
   This prevents us from grepping the correct parameters.

Fix it.

Signed-off-by: Lu Fengqi <lufq.fnst@cn.fujitsu.com>
---
 tests/common       | 8 ++++----
 tests/common.local | 2 +-
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/tests/common b/tests/common
index 51c2e267..7ad436e3 100644
--- a/tests/common
+++ b/tests/common
@@ -106,7 +106,7 @@ run_check()
 	ins=$(_get_spec_ins "$@")
 	spec=$(($ins-1))
 	cmd=$(eval echo "\${$spec}")
-	spec=$(_cmd_spec "$cmd")
+	spec=$(_cmd_spec "${@:$spec}")
 	set -- "${@:1:$(($ins-1))}" $spec "${@: $ins}"
 	echo "############### $@" >> "$RESULTS" 2>&1
 	if [[ $TEST_LOG =~ tty ]]; then echo "CMD: $@" > /dev/tty; fi
@@ -128,7 +128,7 @@ run_check_stdout()
 	ins=$(_get_spec_ins "$@")
 	spec=$(($ins-1))
 	cmd=$(eval echo "\${$spec}")
-	spec=$(_cmd_spec "$cmd")
+	spec=$(_cmd_spec "${@:$spec}")
 	set -- "${@:1:$(($ins-1))}" $spec "${@: $ins}"
 	echo "############### $@" >> "$RESULTS" 2>&1
 	if [[ $TEST_LOG =~ tty ]]; then echo "CMD(stdout): $@" > /dev/tty; fi
@@ -152,7 +152,7 @@ run_mayfail()
 	ins=$(_get_spec_ins "$@")
 	spec=$(($ins-1))
 	cmd=$(eval echo "\${$spec}")
-	spec=$(_cmd_spec "$cmd")
+	spec=$(_cmd_spec "${@:$spec}")
 	set -- "${@:1:$(($ins-1))}" $spec "${@: $ins}"
 	echo "############### $@" >> "$RESULTS" 2>&1
 	if [[ $TEST_LOG =~ tty ]]; then echo "CMD(mayfail): $@" > /dev/tty; fi
@@ -188,7 +188,7 @@ run_mustfail()
 	ins=$(_get_spec_ins "$@")
 	spec=$(($ins-1))
 	cmd=$(eval echo "\${$spec}")
-	spec=$(_cmd_spec "$cmd")
+	spec=$(_cmd_spec "${@:$spec}")
 	set -- "${@:1:$(($ins-1))}" $spec "${@: $ins}"
 	echo "############### $@" >> "$RESULTS" 2>&1
 	if [[ $TEST_LOG =~ tty ]]; then echo "CMD(mustfail): $@" > /dev/tty; fi
diff --git a/tests/common.local b/tests/common.local
index 9f567c27..4f56bb08 100644
--- a/tests/common.local
+++ b/tests/common.local
@@ -17,7 +17,7 @@ TEST_ARGS_CHECK=--mode=lowmem
 # break tests
 _skip_spec()
 {
-	if echo "$TEST_CHECK" | grep -q 'mode=lowmem' &&
+	if echo "$TEST_ARGS_CHECK" | grep -q 'mode=lowmem' &&
 	   echo "$@" | grep -q -- '--repair'; then
 		return 0
 	fi
-- 
2.11.0

[PATCH 8/9] btrfs-progs: fsck-tests: Add new test case for partly written prealloc extent

[Qu Wenruo]

This is a bug found in lowmem mode, which reports false alert for partly
written prealloc extent.

Reported-by: Chris Murphy <chris@colorremedies.com>
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
---
 tests/fsck-tests/020-extent-ref-cases/test.sh | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/tests/fsck-tests/020-extent-ref-cases/test.sh b/tests/fsck-tests/020-extent-ref-cases/test.sh
index 5dc5e55d..91340671 100755
--- a/tests/fsck-tests/020-extent-ref-cases/test.sh
+++ b/tests/fsck-tests/020-extent-ref-cases/test.sh
@@ -18,6 +18,7 @@
 source $TOP/tests/common
 
 check_prereq btrfs
+check_global_prereq xfs_io
 
 for img in *.img *.raw.xz
 do
@@ -28,3 +29,17 @@ do
 	run_check $TOP/btrfs check "$image"
 	rm -f "$image"
 done
+
+# Extra test case for partly written prealloc extents.
+test_prealloc_written()
+{
+	run_check $SUDO_HELPER $TOP/mkfs.btrfs -f $TEST_DEV
+
+	run_check_mount_test_dev
+	xfs_io -f -c "falloc 0 128k" -c "syncfs" $TEST_MNT/tmpfile
+	xfs_io -c "pwrite 0 64k" $TEST_MNT/tmpfile
+
+	run_check_umount_test_dev
+
+	run_check $TOP/btrfs check $TEST_DEV
+}
-- 
2.11.0

[PATCH 9/9] btrfs-progs: fsck: Fix lowmem mode override to allow it skip repair work

[Qu Wenruo]

From: Lu Fengqi <lufq.fnst@cn.fujitsu.com>

Current common.local doesn't handle lowmem mode well.
It passes "--mode=lowmem" alone with "--repair", making it unable to
check lowmem mode.

It's caused by the following bugs:

1) Wrong variable in test/common.local
   We should check TEST_ARGS_CHECK, not TEST_CHECK, which is not defined
   so we never return 1.

2) Wrong parameter passed to _cmd_spec() in test/common
   This prevents us from grepping the correct parameters.

Fix it.

Signed-off-by: Lu Fengqi <lufq.fnst@cn.fujitsu.com>
---
 tests/common       | 8 ++++----
 tests/common.local | 2 +-
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/tests/common b/tests/common
index 51c2e267..7ad436e3 100644
--- a/tests/common
+++ b/tests/common
@@ -106,7 +106,7 @@ run_check()
 	ins=$(_get_spec_ins "$@")
 	spec=$(($ins-1))
 	cmd=$(eval echo "\${$spec}")
-	spec=$(_cmd_spec "$cmd")
+	spec=$(_cmd_spec "${@:$spec}")
 	set -- "${@:1:$(($ins-1))}" $spec "${@: $ins}"
 	echo "############### $@" >> "$RESULTS" 2>&1
 	if [[ $TEST_LOG =~ tty ]]; then echo "CMD: $@" > /dev/tty; fi
@@ -128,7 +128,7 @@ run_check_stdout()
 	ins=$(_get_spec_ins "$@")
 	spec=$(($ins-1))
 	cmd=$(eval echo "\${$spec}")
-	spec=$(_cmd_spec "$cmd")
+	spec=$(_cmd_spec "${@:$spec}")
 	set -- "${@:1:$(($ins-1))}" $spec "${@: $ins}"
 	echo "############### $@" >> "$RESULTS" 2>&1
 	if [[ $TEST_LOG =~ tty ]]; then echo "CMD(stdout): $@" > /dev/tty; fi
@@ -152,7 +152,7 @@ run_mayfail()
 	ins=$(_get_spec_ins "$@")
 	spec=$(($ins-1))
 	cmd=$(eval echo "\${$spec}")
-	spec=$(_cmd_spec "$cmd")
+	spec=$(_cmd_spec "${@:$spec}")
 	set -- "${@:1:$(($ins-1))}" $spec "${@: $ins}"
 	echo "############### $@" >> "$RESULTS" 2>&1
 	if [[ $TEST_LOG =~ tty ]]; then echo "CMD(mayfail): $@" > /dev/tty; fi
@@ -188,7 +188,7 @@ run_mustfail()
 	ins=$(_get_spec_ins "$@")
 	spec=$(($ins-1))
 	cmd=$(eval echo "\${$spec}")
-	spec=$(_cmd_spec "$cmd")
+	spec=$(_cmd_spec "${@:$spec}")
 	set -- "${@:1:$(($ins-1))}" $spec "${@: $ins}"
 	echo "############### $@" >> "$RESULTS" 2>&1
 	if [[ $TEST_LOG =~ tty ]]; then echo "CMD(mustfail): $@" > /dev/tty; fi
diff --git a/tests/common.local b/tests/common.local
index 9f567c27..4f56bb08 100644
--- a/tests/common.local
+++ b/tests/common.local
@@ -17,7 +17,7 @@ TEST_ARGS_CHECK=--mode=lowmem
 # break tests
 _skip_spec()
 {
-	if echo "$TEST_CHECK" | grep -q 'mode=lowmem' &&
+	if echo "$TEST_ARGS_CHECK" | grep -q 'mode=lowmem' &&
 	   echo "$@" | grep -q -- '--repair'; then
 		return 0
 	fi
-- 
2.11.0

Re: [PATCH 0/9] Lowmem mode fsck fixes with fsck-tests framework update

[Christoph Anton Mitterer]

[-- Attachment #1: Type: text/plain, Size: 6669 bytes --]

Hey Qu.

I was giving your patches a try, again on the very same fs (which saw
however writes in the meantime), from my initial report.

btrfs-progs v4.9 WITHOUT patch:
*******************************
# btrfs check /dev/nbd0 ; echo $?
checking extents
checking free space cache
checking fs roots
checking csums
checking root refs
Checking filesystem on /dev/nbd0
UUID: 326d292d-f97b-43ca-b1e8-c722d3474719
found 7519512838144 bytes used err is 0
total csum bytes: 7330834320
total tree bytes: 10902437888
total fs tree bytes: 2019704832
total extent tree bytes: 1020149760
btree space waste bytes: 925714197
file data blocks allocated: 7509228494848
 referenced 7630551511040
0

# btrfs check --mode=lowmem /dev/nbd0 ; echo $?
checking extents
ERROR: block group[74117545984 1073741824] used 1073741824 but extent items used 0
ERROR: block group[239473786880 1073741824] used 1073741824 but extent items used 1207959552
ERROR: block group[500393050112 1073741824] used 1073741824 but extent items used 1207959552
ERROR: block group[581997428736 1073741824] used 1073741824 but extent items used 0
ERROR: block group[626557714432 1073741824] used 1073741824 but extent items used 0
ERROR: block group[668433645568 1073741824] used 1073741824 but extent items used 0
ERROR: block group[948680261632 1073741824] used 1073741824 but extent items used 0
ERROR: block group[982503129088 1073741824] used 1073741824 but extent items used 0
ERROR: block group[1039411445760 1073741824] used 1073741824 but extent items used 0
ERROR: block group[1054443831296 1073741824] used 1073741824 but extent items used 1207959552
ERROR: block group[1190809042944 1073741824] used 1073741824 but extent items used 0
ERROR: block group[1279392743424 1073741824] used 1073741824 but extent items used 0
ERROR: block group[1481256206336 1073741824] used 1073741824 but extent items used 0
ERROR: block group[1620842643456 1073741824] used 1073741824 but extent items used 1207959552
ERROR: block group[1914511032320 1073741824] used 1073741824 but extent items used 1207959552
ERROR: block group[3055361720320 1073741824] used 1073741824 but extent items used 0
ERROR: block group[3216422993920 1073741824] used 1073741824 but extent items used 0
ERROR: block group[3670615785472 1073741824] used 1073741824 but extent items used 1207959552
ERROR: block group[3801612288000 1073741824] used 1073741824 but extent items used 1207959552
ERROR: block group[3828455833600 1073741824] used 1073741824 but extent items used 1207959552
ERROR: block group[4250973241344 1073741824] used 1073741824 but extent items used 0
ERROR: block group[4261710659584 1073741824] used 1073741824 but extent items used 1074266112
ERROR: block group[4392707162112 1073741824] used 1073741824 but extent items used 0
ERROR: block group[4558063403008 1073741824] used 1073741824 but extent items used 0
ERROR: block group[4607455526912 1073741824] used 1073741824 but extent items used 0
ERROR: block group[4635372814336 1073741824] used 1073741824 but extent items used 0
ERROR: block group[4640204652544 1073741824] used 1073741824 but extent items used 0
ERROR: block group[4642352136192 1073741824] used 1073741824 but extent items used 1207959552
ERROR: block group[4681006841856 1073741824] used 1073741824 but extent items used 0
ERROR: block group[5063795802112 1073741824] used 1073741824 but extent items used 0
ERROR: block group[5171169984512 1073741824] used 1073741824 but extent items used 1207959552
ERROR: block group[5216267141120 1073741824] used 1073741824 but extent items used 1207959552
ERROR: block group[5290355326976 1073741824] used 1073741824 but extent items used 0
ERROR: block group[5445511020544 1073741824] used 1073741824 but extent items used 1074266112
ERROR: block group[6084387405824 1073741824] used 1073741824 but extent items used 0
ERROR: block group[6104788500480 1073741824] used 1073741824 but extent items used 0
ERROR: block group[6878956355584 1073741824] used 1073741824 but extent items used 0
ERROR: block group[6997067956224 1073741824] used 1073741824 but extent items used 0
ERROR: block group[7702516334592 1073741824] used 1073741824 but extent items used 0
ERROR: block group[8051482427392 1073741824] used 1073741824 but extent items used 1084751872
ERROR: block group[8116980678656 1073741824] used 1073741824 but extent items used 0
ERROR: errors found in extent allocation tree or chunk allocation
checking free space cache
checking fs roots
Checking filesystem on /dev/nbd0
UUID: 326d292d-f97b-43ca-b1e8-c722d3474719
found 7519512838144 bytes used err is -5
total csum bytes: 7330834320
total tree bytes: 10902437888
total fs tree bytes: 2019704832
total extent tree bytes: 1020149760
btree space waste bytes: 925714197
file data blocks allocated: 7509228494848
 referenced 7630551511040
1

=> so the fs would still show the symptoms


Then, with no RW mount to the fs in between, 4.9 with the following of
your patches:
0001-btrfs-progs-lowmem-check-Fix-wrong-block-group-check.patch 
0003-btrfs-progs-fsck-Output-verbose-error-when-fsck-foun.patch 
0004-btrfs-progs-lowmem-check-Fix-false-alert-in-checking.patch 
0005-btrfs-progs-lowmem-check-Fix-extent-item-size-false-.patch 
the others were anyway just tests related, AFAICS.

btrfs-progs v4.9 WITH patches:
****************************
checking extents
checking free space cache
checking fs roots
checking csums
checking root refs
Checking filesystem on /dev/nbd0
UUID: 326d292d-f97b-43ca-b1e8-c722d3474719
found 7519512838144 bytes used, no error found
total csum bytes: 7330834320
total tree bytes: 10902437888
total fs tree bytes: 2019704832
total extent tree bytes: 1020149760
btree space waste bytes: 925714197
file data blocks allocated: 7509228494848
 referenced 7630551511040
0

=> bon!

# btrfs check --mode=lowmem /dev/nbd0 ; echo $?
checking extents
checking free space cache
checking fs roots
ERROR: root 6031 EXTENT_DATA[277 524288] datasum missing
ERROR: errors found in fs roots
Checking filesystem on /dev/nbd0
UUID: 326d292d-f97b-43ca-b1e8-c722d3474719
found 7519512838144 bytes used, error(s) found
total csum bytes: 7330834320
total tree bytes: 10902437888
total fs tree bytes: 2019704832
total extent tree bytes: 1020149760
btree space waste bytes: 925714197
file data blocks allocated: 7509228494848
 referenced 7630551511040
1

=> some new errors :-(
Not sure though, whether this is an issue in your patch or a new
problem due to my writes (I did just another round of incremental send
-p/receive)


Any ideas?


Best,
Chris.

[-- Attachment #2: smime.p7s --]
[-- Type: application/x-pkcs7-signature, Size: 5930 bytes --]

Re: [PATCH 0/9] Lowmem mode fsck fixes with fsck-tests framework update

[Qu Wenruo]

At 01/25/2017 12:54 AM, Christoph Anton Mitterer wrote:
> Hey Qu.
>
> I was giving your patches a try, again on the very same fs (which saw
> however writes in the meantime), from my initial report.
>
> btrfs-progs v4.9 WITHOUT patch:
> *******************************
> # btrfs check /dev/nbd0 ; echo $?
> checking extents
> checking free space cache
> checking fs roots
> checking csums
> checking root refs
> Checking filesystem on /dev/nbd0
> UUID: 326d292d-f97b-43ca-b1e8-c722d3474719
> found 7519512838144 bytes used err is 0
> total csum bytes: 7330834320
> total tree bytes: 10902437888
> total fs tree bytes: 2019704832
> total extent tree bytes: 1020149760
> btree space waste bytes: 925714197
> file data blocks allocated: 7509228494848
>  referenced 7630551511040
> 0
>
> # btrfs check --mode=lowmem /dev/nbd0 ; echo $?
> checking extents
> ERROR: block group[74117545984 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[239473786880 1073741824] used 1073741824 but extent items used 1207959552
> ERROR: block group[500393050112 1073741824] used 1073741824 but extent items used 1207959552
> ERROR: block group[581997428736 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[626557714432 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[668433645568 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[948680261632 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[982503129088 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[1039411445760 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[1054443831296 1073741824] used 1073741824 but extent items used 1207959552
> ERROR: block group[1190809042944 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[1279392743424 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[1481256206336 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[1620842643456 1073741824] used 1073741824 but extent items used 1207959552
> ERROR: block group[1914511032320 1073741824] used 1073741824 but extent items used 1207959552
> ERROR: block group[3055361720320 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[3216422993920 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[3670615785472 1073741824] used 1073741824 but extent items used 1207959552
> ERROR: block group[3801612288000 1073741824] used 1073741824 but extent items used 1207959552
> ERROR: block group[3828455833600 1073741824] used 1073741824 but extent items used 1207959552
> ERROR: block group[4250973241344 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[4261710659584 1073741824] used 1073741824 but extent items used 1074266112
> ERROR: block group[4392707162112 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[4558063403008 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[4607455526912 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[4635372814336 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[4640204652544 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[4642352136192 1073741824] used 1073741824 but extent items used 1207959552
> ERROR: block group[4681006841856 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[5063795802112 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[5171169984512 1073741824] used 1073741824 but extent items used 1207959552
> ERROR: block group[5216267141120 1073741824] used 1073741824 but extent items used 1207959552
> ERROR: block group[5290355326976 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[5445511020544 1073741824] used 1073741824 but extent items used 1074266112
> ERROR: block group[6084387405824 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[6104788500480 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[6878956355584 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[6997067956224 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[7702516334592 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[8051482427392 1073741824] used 1073741824 but extent items used 1084751872
> ERROR: block group[8116980678656 1073741824] used 1073741824 but extent items used 0
> ERROR: errors found in extent allocation tree or chunk allocation
> checking free space cache
> checking fs roots
> Checking filesystem on /dev/nbd0
> UUID: 326d292d-f97b-43ca-b1e8-c722d3474719
> found 7519512838144 bytes used err is -5
> total csum bytes: 7330834320
> total tree bytes: 10902437888
> total fs tree bytes: 2019704832
> total extent tree bytes: 1020149760
> btree space waste bytes: 925714197
> file data blocks allocated: 7509228494848
>  referenced 7630551511040
> 1
>
> => so the fs would still show the symptoms
>
>
> Then, with no RW mount to the fs in between, 4.9 with the following of
> your patches:
> 0001-btrfs-progs-lowmem-check-Fix-wrong-block-group-check.patch
> 0003-btrfs-progs-fsck-Output-verbose-error-when-fsck-foun.patch
> 0004-btrfs-progs-lowmem-check-Fix-false-alert-in-checking.patch
> 0005-btrfs-progs-lowmem-check-Fix-extent-item-size-false-.patch
> the others were anyway just tests related, AFAICS.
>
> btrfs-progs v4.9 WITH patches:
> ****************************
> checking extents
> checking free space cache
> checking fs roots
> checking csums
> checking root refs
> Checking filesystem on /dev/nbd0
> UUID: 326d292d-f97b-43ca-b1e8-c722d3474719
> found 7519512838144 bytes used, no error found
> total csum bytes: 7330834320
> total tree bytes: 10902437888
> total fs tree bytes: 2019704832
> total extent tree bytes: 1020149760
> btree space waste bytes: 925714197
> file data blocks allocated: 7509228494848
>  referenced 7630551511040
> 0
>
> => bon!
>
> # btrfs check --mode=lowmem /dev/nbd0 ; echo $?
> checking extents
> checking free space cache
> checking fs roots
> ERROR: root 6031 EXTENT_DATA[277 524288] datasum missing

There must be some hidden corner case I didn't cover.

Considering lowmem mode check functions are quite independent to each 
other, I think I could find out the reason just using the error output.

Thanks for the test,
Qu

> ERROR: errors found in fs roots
> Checking filesystem on /dev/nbd0
> UUID: 326d292d-f97b-43ca-b1e8-c722d3474719
> found 7519512838144 bytes used, error(s) found
> total csum bytes: 7330834320
> total tree bytes: 10902437888
> total fs tree bytes: 2019704832
> total extent tree bytes: 1020149760
> btree space waste bytes: 925714197
> file data blocks allocated: 7509228494848
>  referenced 7630551511040
> 1
>
> => some new errors :-(
> Not sure though, whether this is an issue in your patch or a new
> problem due to my writes (I did just another round of incremental send
> -p/receive)
>
>
> Any ideas?
>
>
> Best,
> Chris.
>

Re: [PATCH 0/9] Lowmem mode fsck fixes with fsck-tests framework update

[Christoph Anton Mitterer]

[-- Attachment #1: Type: text/plain, Size: 228 bytes --]

On Wed, 2017-01-25 at 08:44 +0800, Qu Wenruo wrote:
> Thanks for the test,

You're welcome... I'm happy if I can help :)

Just tell me once you think you found something, and I'll repeat the
testing.


Cheers,
Chr
is.

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Re: [PATCH 0/9] Lowmem mode fsck fixes with fsck-tests framework update

[Qu Wenruo]

At 01/25/2017 08:46 AM, Christoph Anton Mitterer wrote:
> On Wed, 2017-01-25 at 08:44 +0800, Qu Wenruo wrote:
>> Thanks for the test,
>
> You're welcome... I'm happy if I can help :)
>
> Just tell me once you think you found something, and I'll repeat the
> testing.
>
>
> Cheers,
> Chr
> is.

New patches are out now.

Although I just updated 
0001-btrfs-progs-lowmem-check-Fix-wrong-block-group-check.patch to fix 
all similar bugs.

You could get it from github:
https://github.com/adam900710/btrfs-progs/tree/lowmem_fixes

Unfortunately, I didn't find the cause of the remaining error of that 
missing csum.
And considering the size of your fs, btrfs-image is not possible, so I'm 
afraid you need to test the patches every time it updates.

Sorry for that,
Qu

Re: [PATCH 0/9] Lowmem mode fsck fixes with fsck-tests framework update

[Christoph Anton Mitterer]

[-- Attachment #1: Type: text/plain, Size: 661 bytes --]

On Wed, 2017-01-25 at 12:16 +0800, Qu Wenruo wrote:
> New patches are out now.
> 
> Although I just updated 
> 0001-btrfs-progs-lowmem-check-Fix-wrong-block-group-check.patch to
> fix 
> all similar bugs.
> 
> You could get it from github:
> https://github.com/adam900710/btrfs-progs/tree/lowmem_fixes

Sure, will take a while, though (hopefully get it done tomorrow)


> Unfortunately, I didn't find the cause of the remaining error of
> that 
> missing csum.
> And considering the size of your fs, btrfs-image is not possible, so
> I'm 
> afraid you need to test the patches every time it updates.

No worries :-)


Cheers,
Chris.

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Re: [PATCH 0/9] Lowmem mode fsck fixes with fsck-tests framework update

[Christoph Anton Mitterer]

[-- Attachment #1: Type: text/plain, Size: 6261 bytes --]

On Wed, 2017-01-25 at 12:16 +0800, Qu Wenruo wrote:
> https://github.com/adam900710/btrfs-progs/tree/lowmem_fixes

Just finished trying your new patches.

Same game as last time, applied to 4.9, no RW mount between the runs.


btrfs-progs v4.9 WITHOUT patch:
*******************************
# btrfs check /dev/nbd0 ; echo $?
checking extents
checking free space cache
checking fs roots
checking csums
checking root refs
Checking filesystem on /dev/nbd0
UUID: 326d292d-f97b-43ca-b1e8-c722d3474719
found 7519512838144 bytes used err is 0
total csum bytes: 7330834320
total tree bytes: 10902437888
total fs tree bytes: 2019704832
total extent tree bytes: 1020149760
btree space waste bytes: 925714197
file data blocks allocated: 7509228494848
 referenced 7630551511040
0


# btrfs check --mode=lowmem /dev/nbd0 ; echo $?
checking extents
ERROR: block group[74117545984 1073741824] used 1073741824 but extent items used 0
ERROR: block group[239473786880 1073741824] used 1073741824 but extent items used 1207959552
ERROR: block group[500393050112 1073741824] used 1073741824 but extent items used 1207959552
ERROR: block group[581997428736 1073741824] used 1073741824 but extent items used 0
ERROR: block group[626557714432 1073741824] used 1073741824 but extent items used 0
ERROR: block group[668433645568 1073741824] used 1073741824 but extent items used 0
ERROR: block group[948680261632 1073741824] used 1073741824 but extent items used 0
ERROR: block group[982503129088 1073741824] used 1073741824 but extent items used 0
ERROR: block group[1039411445760 1073741824] used 1073741824 but extent items used 0
ERROR: block group[1054443831296 1073741824] used 1073741824 but extent items used 1207959552
ERROR: block group[1190809042944 1073741824] used 1073741824 but extent items used 0
ERROR: block group[1279392743424 1073741824] used 1073741824 but extent items used 0
ERROR: block group[1481256206336 1073741824] used 1073741824 but extent items used 0
ERROR: block group[1620842643456 1073741824] used 1073741824 but extent items used 1207959552
ERROR: block group[1914511032320 1073741824] used 1073741824 but extent items used 1207959552
ERROR: block group[3055361720320 1073741824] used 1073741824 but extent items used 0
ERROR: block group[3216422993920 1073741824] used 1073741824 but extent items used 0
ERROR: block group[3670615785472 1073741824] used 1073741824 but extent items used 1207959552
ERROR: block group[3801612288000 1073741824] used 1073741824 but extent items used 1207959552
ERROR: block group[3828455833600 1073741824] used 1073741824 but extent items used 1207959552
ERROR: block group[4250973241344 1073741824] used 1073741824 but extent items used 0
ERROR: block group[4261710659584 1073741824] used 1073741824 but extent items used 1074266112
ERROR: block group[4392707162112 1073741824] used 1073741824 but extent items used 0
ERROR: block group[4558063403008 1073741824] used 1073741824 but extent items used 0
ERROR: block group[4607455526912 1073741824] used 1073741824 but extent items used 0
ERROR: block group[4635372814336 1073741824] used 1073741824 but extent items used 0
ERROR: block group[4640204652544 1073741824] used 1073741824 but extent items used 0
ERROR: block group[4642352136192 1073741824] used 1073741824 but extent items used 1207959552
ERROR: block group[4681006841856 1073741824] used 1073741824 but extent items used 0
ERROR: block group[5063795802112 1073741824] used 1073741824 but extent items used 0
ERROR: block group[5171169984512 1073741824] used 1073741824 but extent items used 1207959552
ERROR: block group[5216267141120 1073741824] used 1073741824 but extent items used 1207959552
ERROR: block group[5290355326976 1073741824] used 1073741824 but extent items used 0
ERROR: block group[5445511020544 1073741824] used 1073741824 but extent items used 1074266112
ERROR: block group[6084387405824 1073741824] used 1073741824 but extent items used 0
ERROR: block group[6104788500480 1073741824] used 1073741824 but extent items used 0
ERROR: block group[6878956355584 1073741824] used 1073741824 but extent items used 0
ERROR: block group[6997067956224 1073741824] used 1073741824 but extent items used 0
ERROR: block group[7702516334592 1073741824] used 1073741824 but extent items used 0
ERROR: block group[8051482427392 1073741824] used 1073741824 but extent items used 1084751872
ERROR: block group[8116980678656 1073741824] used 1073741824 but extent items used 0
ERROR: errors found in extent allocation tree or chunk allocation
checking free space cache
checking fs roots
Checking filesystem on /dev/nbd0
UUID: 326d292d-f97b-43ca-b1e8-c722d3474719
found 7519512838144 bytes used err is -5
total csum bytes: 7330834320
total tree bytes: 10902437888
total fs tree bytes: 2019704832
total extent tree bytes: 1020149760
btree space waste bytes: 925714197
file data blocks allocated: 7509228494848
 referenced 7630551511040
1

btrfs-progs v4.9 WITH patches:
******************************
# btrfs check /dev/nbd0 ; echo $?
checking extents
checking free space cache
checking fs roots
checking csums
checking root refs
Checking filesystem on /dev/nbd0
UUID: 326d292d-f97b-43ca-b1e8-c722d3474719
found 7519512838144 bytes used, no error found
total csum bytes: 7330834320
total tree bytes: 10902437888
total fs tree bytes: 2019704832
total extent tree bytes: 1020149760
btree space waste bytes: 925714197
file data blocks allocated: 7509228494848
 referenced 7630551511040
0

# btrfs check --mode=lowmem /dev/nbd0 ; echo $?
checking extents
checking free space cache
checking fs roots
ERROR: root 6031 EXTENT_DATA[277 524288] datasum missing
ERROR: errors found in fs roots
Checking filesystem on /dev/nbd0
UUID: 326d292d-f97b-43ca-b1e8-c722d3474719
found 7519512838144 bytes used, error(s) found
total csum bytes: 7330834320
total tree bytes: 10902437888
total fs tree bytes: 2019704832
total extent tree bytes: 1020149760
btree space waste bytes: 925714197
file data blocks allocated: 7509228494848
 referenced 7630551511040
1

=> so unfortunately what seems to be the very same error than before

Just tell me if you find something new :)


Cheers,
Chris.

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Re: [PATCH 0/9] Lowmem mode fsck fixes with fsck-tests framework update

[Qu Wenruo]

Thanks for your patient and the test!

At 01/26/2017 10:50 AM, Christoph Anton Mitterer wrote:
> On Wed, 2017-01-25 at 12:16 +0800, Qu Wenruo wrote:
>> https://github.com/adam900710/btrfs-progs/tree/lowmem_fixes
>
> Just finished trying your new patches.
>
> Same game as last time, applied to 4.9, no RW mount between the runs.
>
>
> btrfs-progs v4.9 WITHOUT patch:
> *******************************
> # btrfs check /dev/nbd0 ; echo $?
> checking extents
> checking free space cache
> checking fs roots
> checking csums
> checking root refs
> Checking filesystem on /dev/nbd0
> UUID: 326d292d-f97b-43ca-b1e8-c722d3474719
> found 7519512838144 bytes used err is 0
> total csum bytes: 7330834320
> total tree bytes: 10902437888
> total fs tree bytes: 2019704832
> total extent tree bytes: 1020149760
> btree space waste bytes: 925714197
> file data blocks allocated: 7509228494848
>  referenced 7630551511040
> 0
>
>
> # btrfs check --mode=lowmem /dev/nbd0 ; echo $?
> checking extents
> ERROR: block group[74117545984 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[239473786880 1073741824] used 1073741824 but extent items used 1207959552
> ERROR: block group[500393050112 1073741824] used 1073741824 but extent items used 1207959552
> ERROR: block group[581997428736 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[626557714432 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[668433645568 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[948680261632 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[982503129088 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[1039411445760 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[1054443831296 1073741824] used 1073741824 but extent items used 1207959552
> ERROR: block group[1190809042944 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[1279392743424 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[1481256206336 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[1620842643456 1073741824] used 1073741824 but extent items used 1207959552
> ERROR: block group[1914511032320 1073741824] used 1073741824 but extent items used 1207959552
> ERROR: block group[3055361720320 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[3216422993920 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[3670615785472 1073741824] used 1073741824 but extent items used 1207959552
> ERROR: block group[3801612288000 1073741824] used 1073741824 but extent items used 1207959552
> ERROR: block group[3828455833600 1073741824] used 1073741824 but extent items used 1207959552
> ERROR: block group[4250973241344 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[4261710659584 1073741824] used 1073741824 but extent items used 1074266112
> ERROR: block group[4392707162112 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[4558063403008 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[4607455526912 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[4635372814336 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[4640204652544 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[4642352136192 1073741824] used 1073741824 but extent items used 1207959552
> ERROR: block group[4681006841856 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[5063795802112 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[5171169984512 1073741824] used 1073741824 but extent items used 1207959552
> ERROR: block group[5216267141120 1073741824] used 1073741824 but extent items used 1207959552
> ERROR: block group[5290355326976 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[5445511020544 1073741824] used 1073741824 but extent items used 1074266112
> ERROR: block group[6084387405824 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[6104788500480 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[6878956355584 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[6997067956224 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[7702516334592 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[8051482427392 1073741824] used 1073741824 but extent items used 1084751872
> ERROR: block group[8116980678656 1073741824] used 1073741824 but extent items used 0
> ERROR: errors found in extent allocation tree or chunk allocation
> checking free space cache
> checking fs roots
> Checking filesystem on /dev/nbd0
> UUID: 326d292d-f97b-43ca-b1e8-c722d3474719
> found 7519512838144 bytes used err is -5
> total csum bytes: 7330834320
> total tree bytes: 10902437888
> total fs tree bytes: 2019704832
> total extent tree bytes: 1020149760
> btree space waste bytes: 925714197
> file data blocks allocated: 7509228494848
>  referenced 7630551511040
> 1

In fact, the result without patches is not really needed for current stage.

Feel free to skip them until the patched ones passed.
Which should save you some time.

>
> btrfs-progs v4.9 WITH patches:
> ******************************
> # btrfs check /dev/nbd0 ; echo $?
> checking extents
> checking free space cache
> checking fs roots
> checking csums
> checking root refs
> Checking filesystem on /dev/nbd0
> UUID: 326d292d-f97b-43ca-b1e8-c722d3474719
> found 7519512838144 bytes used, no error found
> total csum bytes: 7330834320
> total tree bytes: 10902437888
> total fs tree bytes: 2019704832
> total extent tree bytes: 1020149760
> btree space waste bytes: 925714197
> file data blocks allocated: 7509228494848
>  referenced 7630551511040
> 0

Same for original mode.

>
> # btrfs check --mode=lowmem /dev/nbd0 ; echo $?
> checking extents
> checking free space cache
> checking fs roots
> ERROR: root 6031 EXTENT_DATA[277 524288] datasum missing
> ERROR: errors found in fs roots
> Checking filesystem on /dev/nbd0
> UUID: 326d292d-f97b-43ca-b1e8-c722d3474719
> found 7519512838144 bytes used, error(s) found
> total csum bytes: 7330834320
> total tree bytes: 10902437888
> total fs tree bytes: 2019704832
> total extent tree bytes: 1020149760
> btree space waste bytes: 925714197
> file data blocks allocated: 7509228494848
>  referenced 7630551511040
> 1
>
> => so unfortunately what seems to be the very same error than before
>
> Just tell me if you find something new :)
>
>
> Cheers,
> Chris.
>
Would you please try lowmem_tests branch of my repo?

That branch contains a special debug output for the case you 
encountered, which should help to debug the case.
pecial debug output for the case you encountered, which
Thanks,
Qu

Re: [PATCH 0/9] Lowmem mode fsck fixes with fsck-tests framework update

[Christoph Anton Mitterer]

[-- Attachment #1: Type: text/plain, Size: 924 bytes --]

On Thu, 2017-01-26 at 11:10 +0800, Qu Wenruo wrote:
> In fact, the result without patches is not really needed for current
> stage.
> 
> Feel free to skip them until the patched ones passed.
> Which should save you some time.

Well the idea is, that if I do further writes in the meantime (by
adding new backup data), then things in the fs could change (I blindly
assume) in such a way, that the false positive isn't triggered any more
- not because a patch would finally have it fixed, but simply because
things on the fs changed...

That's why I repeated it always so far - just to see that the issues
would be still there.


> Would you please try lowmem_tests branch of my repo?
> 
> That branch contains a special debug output for the case you 
> encountered, which should help to debug the case.
> pecial debug output for the case you encountered, which

Sure, tomorrow.

Best wishes,
Chris.

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Re: [PATCH 0/9] Lowmem mode fsck fixes with fsck-tests framework update

[Christoph Anton Mitterer]

[-- Attachment #1: Type: text/plain, Size: 50025 bytes --]

On Thu, 2017-01-26 at 11:10 +0800, Qu Wenruo wrote:
> Would you please try lowmem_tests branch of my repo?
> 
> That branch contains a special debug output for the case you 
> encountered, which should help to debug the case.
> pecial debug output for the case you encountered, which

Here the output with your patches (again, not having applied the
unnecessary fs-tests patches):

In the output below I've replaced filenames with "[snip..snap]" and
exchanged some of the xattr values.
In case you should need their original values for testing, just tell me
and I send them to you off-list.

btrfs-progs v4.9 WITH patches:
******************************
# btrfs check --mode=lowmem /dev/nbd0 ; echo $?
checking extents
checking free space cache
checking fs roots
ERROR: root 6031 EXTENT_DATA[277 524288] datasum missing, have: 36864, expect: 45056 ret: 0
Checking filesystem on /dev/nbd0
UUID: 326d292d-f97b-43ca-b1e8-c722d3474719
=== fs tree leaf dump: slot: 136 ===
leaf 5960902508544 items 191 free space 60 generation 2775 owner 6031
fs uuid 326d292d-f97b-43ca-b1e8-c722d3474719
chunk uuid 5da7e818-7f0b-43c1-b465-fdfaa52da633
	item 0 key (274 EXTENT_DATA 7733248) itemoff 16230 itemsize 53
		generation 2775 type 1 (regular)
		extent data disk byte 6807724716032 nr 118784
		extent data offset 0 nr 131072 ram 131072
		extent compression 1 (zlib)
	item 1 key (274 EXTENT_DATA 7864320) itemoff 16177 itemsize 53
		generation 2775 type 1 (regular)
		extent data disk byte 6807724834816 nr 118784
		extent data offset 0 nr 131072 ram 131072
		extent compression 1 (zlib)
	item 2 key (274 EXTENT_DATA 7995392) itemoff 16124 itemsize 53
		generation 2775 type 1 (regular)
		extent data disk byte 6807724953600 nr 122880
		extent data offset 0 nr 131072 ram 131072
		extent compression 1 (zlib)
	item 3 key (274 EXTENT_DATA 8126464) itemoff 16071 itemsize 53
		generation 2775 type 1 (regular)
		extent data disk byte 6807725076480 nr 122880
		extent data offset 0 nr 131072 ram 131072
		extent compression 1 (zlib)
	item 4 key (274 EXTENT_DATA 8257536) itemoff 16018 itemsize 53
		generation 2775 type 1 (regular)
		extent data disk byte 6807725199360 nr 118784
		extent data offset 0 nr 131072 ram 131072
		extent compression 1 (zlib)
	item 5 key (274 EXTENT_DATA 8388608) itemoff 15965 itemsize 53
		generation 2775 type 1 (regular)
		extent data disk byte 6807725318144 nr 114688
		extent data offset 0 nr 131072 ram 131072
		extent compression 1 (zlib)
	item 6 key (274 EXTENT_DATA 8519680) itemoff 15912 itemsize 53
		generation 2775 type 1 (regular)
		extent data disk byte 6807725432832 nr 118784
		extent data offset 0 nr 131072 ram 131072
		extent compression 1 (zlib)
	item 7 key (274 EXTENT_DATA 8650752) itemoff 15859 itemsize 53
		generation 2775 type 1 (regular)
		extent data disk byte 6807725551616 nr 118784
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		data a6e286c88c1b290294e5367513e670c3d50456d81ba59486d00fa15509042e464116c0f061711d9fdd0c94ed642106868660b7ae984713b498d28a87732822b7
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		atime 1471659969.700048076 (2016-08-20 04:26:09)
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		atime 1471659959.995941565 (2016-08-20 04:25:59)
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		atime 1471659973.56084916 (2016-08-20 04:26:13)
		ctime 1473986194.23591408 (2016-09-16 02:36:34)
		mtime 1471660037.868796793 (2016-08-20 04:27:17)
		otime 1473986193.803588694 (2016-09-16 02:36:33)
=== csum tree dump ===
leaf 4983028940800 items 22 free space 6853 generation 3093 owner 7
fs uuid 326d292d-f97b-43ca-b1e8-c722d3474719
chunk uuid 5da7e818-7f0b-43c1-b465-fdfaa52da633
	item 0 key (EXTENT_CSUM EXTENT_CSUM 6805691457536) itemoff 16279 itemsize 4
		extent csum item
	item 1 key (EXTENT_CSUM EXTENT_CSUM 6805691461632) itemoff 16275 itemsize 4
		extent csum item
	item 2 key (EXTENT_CSUM EXTENT_CSUM 6805691465728) itemoff 16263 itemsize 12
		extent csum item
	item 3 key (EXTENT_CSUM EXTENT_CSUM 6805691478016) itemoff 16231 itemsize 32
		extent csum item
	item 4 key (EXTENT_CSUM EXTENT_CSUM 6805691510784) itemoff 16223 itemsize 8
		extent csum item
	item 5 key (EXTENT_CSUM EXTENT_CSUM 6805691518976) itemoff 16199 itemsize 24
		extent csum item
	item 6 key (EXTENT_CSUM EXTENT_CSUM 6805691543552) itemoff 16183 itemsize 16
		extent csum item
	item 7 key (EXTENT_CSUM EXTENT_CSUM 6805691559936) itemoff 15159 itemsize 1024
		extent csum item
	item 8 key (EXTENT_CSUM EXTENT_CSUM 6805692608512) itemoff 15151 itemsize 8
		extent csum item
	item 9 key (EXTENT_CSUM EXTENT_CSUM 6805692616704) itemoff 15055 itemsize 96
		extent csum item
	item 10 key (EXTENT_CSUM EXTENT_CSUM 6805692715008) itemoff 14903 itemsize 152
		extent csum item
	item 11 key (EXTENT_CSUM EXTENT_CSUM 6805693132800) itemoff 14519 itemsize 384
		extent csum item
	item 12 key (EXTENT_CSUM EXTENT_CSUM 6805693526016) itemoff 14391 itemsize 128
		extent csum item
	item 13 key (EXTENT_CSUM EXTENT_CSUM 6805693919232) itemoff 14135 itemsize 256
		extent csum item
	item 14 key (EXTENT_CSUM EXTENT_CSUM 6805694443520) itemoff 12727 itemsize 1408
		extent csum item
	item 15 key (EXTENT_CSUM EXTENT_CSUM 6805695885312) itemoff 11811 itemsize 916
		extent csum item
	item 16 key (EXTENT_CSUM EXTENT_CSUM 6805696823296) itemoff 11007 itemsize 804
		extent csum item
	item 17 key (EXTENT_CSUM EXTENT_CSUM 6805697646592) itemoff 10211 itemsize 796
		extent csum item
	item 18 key (EXTENT_CSUM EXTENT_CSUM 6805698461696) itemoff 9799 itemsize 412
		extent csum item
	item 19 key (EXTENT_CSUM EXTENT_CSUM 6805698883584) itemoff 9259 itemsize 540
		extent csum item
	item 20 key (EXTENT_CSUM EXTENT_CSUM 6805699436544) itemoff 8827 itemsize 432
		extent csum item
	item 21 key (EXTENT_CSUM EXTENT_CSUM 6805699878912) itemoff 7403 itemsize 1424
		extent csum item
=== csum tree dump ===
leaf 4983028940800 items 22 free space 6853 generation 3093 owner 7
fs uuid 326d292d-f97b-43ca-b1e8-c722d3474719
chunk uuid 5da7e818-7f0b-43c1-b465-fdfaa52da633
	item 0 key (EXTENT_CSUM EXTENT_CSUM 6805691457536) itemoff 16279 itemsize 4
		extent csum item
	item 1 key (EXTENT_CSUM EXTENT_CSUM 6805691461632) itemoff 16275 itemsize 4
		extent csum item
	item 2 key (EXTENT_CSUM EXTENT_CSUM 6805691465728) itemoff 16263 itemsize 12
		extent csum item
	item 3 key (EXTENT_CSUM EXTENT_CSUM 6805691478016) itemoff 16231 itemsize 32
		extent csum item
	item 4 key (EXTENT_CSUM EXTENT_CSUM 6805691510784) itemoff 16223 itemsize 8
		extent csum item
	item 5 key (EXTENT_CSUM EXTENT_CSUM 6805691518976) itemoff 16199 itemsize 24
		extent csum item
	item 6 key (EXTENT_CSUM EXTENT_CSUM 6805691543552) itemoff 16183 itemsize 16
		extent csum item
	item 7 key (EXTENT_CSUM EXTENT_CSUM 6805691559936) itemoff 15159 itemsize 1024
		extent csum item
	item 8 key (EXTENT_CSUM EXTENT_CSUM 6805692608512) itemoff 15151 itemsize 8
		extent csum item
	item 9 key (EXTENT_CSUM EXTENT_CSUM 6805692616704) itemoff 15055 itemsize 96
		extent csum item
	item 10 key (EXTENT_CSUM EXTENT_CSUM 6805692715008) itemoff 14903 itemsize 152
		extent csum item
	item 11 key (EXTENT_CSUM EXTENT_CSUM 6805693132800) itemoff 14519 itemsize 384
		extent csum item
	item 12 key (EXTENT_CSUM EXTENT_CSUM 6805693526016) itemoff 14391 itemsize 128
		extent csum item
	item 13 key (EXTENT_CSUM EXTENT_CSUM 6805693919232) itemoff 14135 itemsize 256
		extent csum item
	item 14 key (EXTENT_CSUM EXTENT_CSUM 6805694443520) itemoff 12727 itemsize 1408
		extent csum item
	item 15 key (EXTENT_CSUM EXTENT_CSUM 6805695885312) itemoff 11811 itemsize 916
		extent csum item
	item 16 key (EXTENT_CSUM EXTENT_CSUM 6805696823296) itemoff 11007 itemsize 804
		extent csum item
	item 17 key (EXTENT_CSUM EXTENT_CSUM 6805697646592) itemoff 10211 itemsize 796
		extent csum item
	item 18 key (EXTENT_CSUM EXTENT_CSUM 6805698461696) itemoff 9799 itemsize 412
		extent csum item
	item 19 key (EXTENT_CSUM EXTENT_CSUM 6805698883584) itemoff 9259 itemsize 540
		extent csum item
	item 20 key (EXTENT_CSUM EXTENT_CSUM 6805699436544) itemoff 8827 itemsize 432
		extent csum item
	item 21 key (EXTENT_CSUM EXTENT_CSUM 6805699878912) itemoff 7403 itemsize 1424
		extent csum item
ERROR: errors found in fs roots
found 7519512838144 bytes used, error(s) found
total csum bytes: 7330834320
total tree bytes: 10902437888
total fs tree bytes: 2019704832
total extent tree bytes: 1020149760
btree space waste bytes: 925714197
file data blocks allocated: 7509228494848
 referenced 7630551511040
1


Cheers,
Chris.

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Re: [PATCH 0/9] Lowmem mode fsck fixes with fsck-tests framework update

[Qu Wenruo]

On 01/27/2017 07:31 AM, Christoph Anton Mitterer wrote:
> On Thu, 2017-01-26 at 11:10 +0800, Qu Wenruo wrote:
>> Would you please try lowmem_tests branch of my repo?
>>
>> That branch contains a special debug output for the case you
>> encountered, which should help to debug the case.
>> pecial debug output for the case you encountered, which
>
> Here the output with your patches (again, not having applied the
> unnecessary fs-tests patches):
>
> In the output below I've replaced filenames with "[snip..snap]" and
> exchanged some of the xattr values.
> In case you should need their original values for testing, just tell me
> and I send them to you off-list.

Sorry for the late reply, in Chinese New Year vacation.

>
> btrfs-progs v4.9 WITH patches:
> ******************************
> # btrfs check --mode=lowmem /dev/nbd0 ; echo $?
> checking extents
> checking free space cache
> checking fs roots
> ERROR: root 6031 EXTENT_DATA[277 524288] datasum missing, have: 36864, expect: 45056 ret: 0

Thanks a lot for your debug output!

This shows the full reason of the problem! And it can be fixed easily now.
> Checking filesystem on /dev/nbd0
> UUID: 326d292d-f97b-43ca-b1e8-c722d3474719
> === fs tree leaf dump: slot: 136 ===
> leaf 5960902508544 items 191 free space 60 generation 2775 owner 6031
> fs uuid 326d292d-f97b-43ca-b1e8-c722d3474719
> chunk uuid 5da7e818-7f0b-43c1-b465-fdfaa52da633
<snipped>
> 	item 136 key (277 EXTENT_DATA 524288) itemoff 8443 itemsize 53
> 		generation 2775 type 1 (regular)
> 		extent data disk byte 6805694144512 nr 36864
> 		extent data offset 0 nr 45056 ram 45056
> 		extent compression 1 (zlib)

I just forgot that, we must handle plain extent and compressed extent 
separately.

For compressed case, we should not use extent offset and nr_bytes, but 
use the full extent.

I'll update the patchset soon to address it.

Thanks again for your detailed output and patience,
Qu

> === csum tree dump ===
> leaf 4983028940800 items 22 free space 6853 generation 3093 owner 7
> fs uuid 326d292d-f97b-43ca-b1e8-c722d3474719
> chunk uuid 5da7e818-7f0b-43c1-b465-fdfaa52da633
> 	item 0 key (EXTENT_CSUM EXTENT_CSUM 6805691457536) itemoff 16279 itemsize 4
> 		extent csum item
> 	item 1 key (EXTENT_CSUM EXTENT_CSUM 6805691461632) itemoff 16275 itemsize 4
> 		extent csum item
> 	item 2 key (EXTENT_CSUM EXTENT_CSUM 6805691465728) itemoff 16263 itemsize 12
> 		extent csum item
> 	item 3 key (EXTENT_CSUM EXTENT_CSUM 6805691478016) itemoff 16231 itemsize 32
> 		extent csum item
> 	item 4 key (EXTENT_CSUM EXTENT_CSUM 6805691510784) itemoff 16223 itemsize 8
> 		extent csum item
> 	item 5 key (EXTENT_CSUM EXTENT_CSUM 6805691518976) itemoff 16199 itemsize 24
> 		extent csum item
> 	item 6 key (EXTENT_CSUM EXTENT_CSUM 6805691543552) itemoff 16183 itemsize 16
> 		extent csum item
> 	item 7 key (EXTENT_CSUM EXTENT_CSUM 6805691559936) itemoff 15159 itemsize 1024
> 		extent csum item
> 	item 8 key (EXTENT_CSUM EXTENT_CSUM 6805692608512) itemoff 15151 itemsize 8
> 		extent csum item
> 	item 9 key (EXTENT_CSUM EXTENT_CSUM 6805692616704) itemoff 15055 itemsize 96
> 		extent csum item
> 	item 10 key (EXTENT_CSUM EXTENT_CSUM 6805692715008) itemoff 14903 itemsize 152
> 		extent csum item
> 	item 11 key (EXTENT_CSUM EXTENT_CSUM 6805693132800) itemoff 14519 itemsize 384
> 		extent csum item
> 	item 12 key (EXTENT_CSUM EXTENT_CSUM 6805693526016) itemoff 14391 itemsize 128
> 		extent csum item
> 	item 13 key (EXTENT_CSUM EXTENT_CSUM 6805693919232) itemoff 14135 itemsize 256
> 		extent csum item
> 	item 14 key (EXTENT_CSUM EXTENT_CSUM 6805694443520) itemoff 12727 itemsize 1408
> 		extent csum item
> 	item 15 key (EXTENT_CSUM EXTENT_CSUM 6805695885312) itemoff 11811 itemsize 916
> 		extent csum item
> 	item 16 key (EXTENT_CSUM EXTENT_CSUM 6805696823296) itemoff 11007 itemsize 804
> 		extent csum item
> 	item 17 key (EXTENT_CSUM EXTENT_CSUM 6805697646592) itemoff 10211 itemsize 796
> 		extent csum item
> 	item 18 key (EXTENT_CSUM EXTENT_CSUM 6805698461696) itemoff 9799 itemsize 412
> 		extent csum item
> 	item 19 key (EXTENT_CSUM EXTENT_CSUM 6805698883584) itemoff 9259 itemsize 540
> 		extent csum item
> 	item 20 key (EXTENT_CSUM EXTENT_CSUM 6805699436544) itemoff 8827 itemsize 432
> 		extent csum item
> 	item 21 key (EXTENT_CSUM EXTENT_CSUM 6805699878912) itemoff 7403 itemsize 1424
> 		extent csum item
> ERROR: errors found in fs roots
> found 7519512838144 bytes used, error(s) found
> total csum bytes: 7330834320
> total tree bytes: 10902437888
> total fs tree bytes: 2019704832
> total extent tree bytes: 1020149760
> btree space waste bytes: 925714197
> file data blocks allocated: 7509228494848
>  referenced 7630551511040
> 1
>
>
> Cheers,
> Chris.
>

Re: [PATCH 0/9] Lowmem mode fsck fixes with fsck-tests framework update

[Christoph Anton Mitterer]

[-- Attachment #1: Type: text/plain, Size: 322 bytes --]

On Sun, 2017-01-29 at 12:27 +0800, Qu Wenruo wrote:
> Sorry for the late reply, in Chinese New Year vacation.
No worries... and happy new year then ;)


> I'll update the patchset soon to address it.
Just tell me and I re-check.


> Thanks again for your detailed output and patience,
Thanks as well :)

Chris.

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Re: [PATCH 0/9] Lowmem mode fsck fixes with fsck-tests framework update

[Qu Wenruo]

At 01/30/2017 11:07 AM, Christoph Anton Mitterer wrote:
> On Sun, 2017-01-29 at 12:27 +0800, Qu Wenruo wrote:
>> Sorry for the late reply, in Chinese New Year vacation.
> No worries... and happy new year then ;)

Happy new year!

>
>
>> I'll update the patchset soon to address it.
> Just tell me and I re-check.

Updated, since I'm confident with this update, I'm not using the 
lowmem_tests branch, but lowmem_fixes branch.
(lowmem_tests branch is now deleted in my repo)

https://github.com/adam900710/btrfs-progs/tree/lowmem_fixes

Which is also rebased to latest v4.9.1.

Thanks,
Qu

>
>
>> Thanks again for your detailed output and patience,
> Thanks as well :)
>
> Chris.
>

Re: [PATCH 0/9] Lowmem mode fsck fixes with fsck-tests framework update

[Christoph Anton Mitterer]

[-- Attachment #1: Type: text/plain, Size: 6407 bytes --]

On Wed, 2017-02-01 at 09:06 +0800, Qu Wenruo wrote:
> https://github.com/adam900710/btrfs-progs/tree/lowmem_fixes
> 
> Which is also rebased to latest v4.9.1.

Same game as last time, applied to 4.9, no RW mount between the runs.


btrfs-progs v4.9 WITHOUT patch:
*******************************
# btrfs check /dev/nbd0 ; echo $?
checking extents
137

=> would be nice if btrfs-progrs could give a message on why it failed,
i.e. "not enough memory" or so.


# btrfs check --mode=lowmem /dev/nbd0 ; echo $?
checking extents
ERROR: block group[74117545984 1073741824] used 1073741824 but extent items used 0
ERROR: block group[239473786880 1073741824] used 1073741824 but extent items used 1207959552
ERROR: block group[500393050112 1073741824] used 1073741824 but extent items used 1207959552
ERROR: block group[581997428736 1073741824] used 1073741824 but extent items used 0
ERROR: block group[626557714432 1073741824] used 1073741824 but extent items used 0
ERROR: block group[668433645568 1073741824] used 1073741824 but extent items used 0
ERROR: block group[948680261632 1073741824] used 1073741824 but extent items used 0
ERROR: block group[982503129088 1073741824] used 1073741824 but extent items used 0
ERROR: block group[1039411445760 1073741824] used 1073741824 but extent items used 0
ERROR: block group[1054443831296 1073741824] used 1073741824 but extent items used 1207959552
ERROR: block group[1190809042944 1073741824] used 1073741824 but extent items used 0
ERROR: block group[1279392743424 1073741824] used 1073741824 but extent items used 0
ERROR: block group[1481256206336 1073741824] used 1073741824 but extent items used 0
ERROR: block group[1620842643456 1073741824] used 1073741824 but extent items used 1207959552
ERROR: block group[1914511032320 1073741824] used 1073741824 but extent items used 1207959552
ERROR: block group[3055361720320 1073741824] used 1073741824 but extent items used 0
ERROR: block group[3216422993920 1073741824] used 1073741824 but extent items used 0
ERROR: block group[3670615785472 1073741824] used 1073741824 but extent items used 1207959552
ERROR: block group[3801612288000 1073741824] used 1073741824 but extent items used 1207959552
ERROR: block group[3828455833600 1073741824] used 1073741824 but extent items used 1207959552
ERROR: block group[4250973241344 1073741824] used 1073741824 but extent items used 0
ERROR: block group[4261710659584 1073741824] used 1073741824 but extent items used 1074266112
ERROR: block group[4392707162112 1073741824] used 1073741824 but extent items used 0
ERROR: block group[4558063403008 1073741824] used 1073741824 but extent items used 0
ERROR: block group[4607455526912 1073741824] used 1073741824 but extent items used 0
ERROR: block group[4635372814336 1073741824] used 1073741824 but extent items used 0
ERROR: block group[4640204652544 1073741824] used 1073741824 but extent items used 0
ERROR: block group[4642352136192 1073741824] used 1073741824 but extent items used 1207959552
ERROR: block group[4681006841856 1073741824] used 1073741824 but extent items used 0
ERROR: block group[5063795802112 1073741824] used 1073741824 but extent items used 0
ERROR: block group[5171169984512 1073741824] used 1073741824 but extent items used 1207959552
ERROR: block group[5216267141120 1073741824] used 1073741824 but extent items used 1207959552
ERROR: block group[5290355326976 1073741824] used 1073741824 but extent items used 0
ERROR: block group[5445511020544 1073741824] used 1073741824 but extent items used 1074266112
ERROR: block group[6084387405824 1073741824] used 1073741824 but extent items used 0
ERROR: block group[6104788500480 1073741824] used 1073741824 but extent items used 0
ERROR: block group[6878956355584 1073741824] used 1073741824 but extent items used 0
ERROR: block group[6997067956224 1073741824] used 1073741824 but extent items used 0
ERROR: block group[7702516334592 1073741824] used 1073741824 but extent items used 0
ERROR: block group[8051482427392 1073741824] used 1073741824 but extent items used 1084751872
ERROR: block group[8116980678656 1073741824] used 1073741824 but extent items used 0
ERROR: errors found in extent allocation tree or chunk allocation
checking free space cache
checking fs roots
Checking filesystem on /dev/nbd0
UUID: 326d292d-f97b-43ca-b1e8-c722d3474719
found 7519512838144 bytes used err is -5
total csum bytes: 7330834320
total tree bytes: 10902437888
total fs tree bytes: 2019704832
total extent tree bytes: 1020149760
btree space waste bytes: 925714197
file data blocks allocated: 7509228494848
 referenced 7630551511040
1
=> error still occurs *without* patch

=> increased VM memory here

# btrfs check /dev/nbd0 ; echo $?
checking extents
checking free space cache
checking fs roots
checking csums
checking root refs
Checking filesystem on /dev/nbd0
UUID: 326d292d-f97b-43ca-b1e8-c722d3474719
found 7519512838144 bytes used err is 0
total csum bytes: 7330834320
total tree bytes: 10902437888
total fs tree bytes: 2019704832
total extent tree bytes: 1020149760
btree space waste bytes: 925714197
file data blocks allocated: 7509228494848
 referenced 7630551511040
0
=> same as before




btrfs-progs v4.9 WITH patches:
******************************
# btrfs check /dev/nbd0 ; echo $?
checking extents
checking free space
cache
checking fs roots
checking csums
checking root refs
Checking
filesystem on /dev/nbd0
UUID: 326d292d-f97b-43ca-b1e8-c722d3474719
found
7519512838144 bytes used, no error found
total csum bytes: 7330834320
tot
al tree bytes: 10902437888
total fs tree bytes: 2019704832
total extent
tree bytes: 1020149760
btree space waste bytes: 925714197
file data
blocks allocated: 7509228494848
 referenced 7630551511040
0
=> same as
before

# btrfs check --mode=lowmem /dev/nbd0 ; echo $?
checking extents
checking free space cache
checking fs roots
ERROR: errors found in fs roots
Checking filesystem on /dev/nbd0
UUID: 326d292d-f97b-43ca-b1e8-c722d3474719
found 7519512838144 bytes used, error(s) found
total csum bytes: 7330834320
total tree bytes: 10902437888
total fs tree bytes: 2019704832
total extent tree bytes: 1020149760
btree space waste bytes: 925714197
file data blocks allocated: 7509228494848
 referenced 7630551511040
1

=> Unfortunately :-(



Cheers,
Chris.

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Re: [PATCH 0/9] Lowmem mode fsck fixes with fsck-tests framework update

[Qu Wenruo]

Thanks for your test.

At 02/02/2017 06:03 AM, Christoph Anton Mitterer wrote:
> On Wed, 2017-02-01 at 09:06 +0800, Qu Wenruo wrote:
>> https://github.com/adam900710/btrfs-progs/tree/lowmem_fixes
>>
>> Which is also rebased to latest v4.9.1.
>
> Same game as last time, applied to 4.9, no RW mount between the runs.
>
>
> btrfs-progs v4.9 WITHOUT patch:
> *******************************
> # btrfs check /dev/nbd0 ; echo $?
> checking extents
> 137
>
> => would be nice if btrfs-progrs could give a message on why it failed,
> i.e. "not enough memory" or so.
>
>
> # btrfs check --mode=lowmem /dev/nbd0 ; echo $?
> checking extents
> ERROR: block group[74117545984 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[239473786880 1073741824] used 1073741824 but extent items used 1207959552
> ERROR: block group[500393050112 1073741824] used 1073741824 but extent items used 1207959552
> ERROR: block group[581997428736 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[626557714432 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[668433645568 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[948680261632 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[982503129088 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[1039411445760 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[1054443831296 1073741824] used 1073741824 but extent items used 1207959552
> ERROR: block group[1190809042944 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[1279392743424 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[1481256206336 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[1620842643456 1073741824] used 1073741824 but extent items used 1207959552
> ERROR: block group[1914511032320 1073741824] used 1073741824 but extent items used 1207959552
> ERROR: block group[3055361720320 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[3216422993920 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[3670615785472 1073741824] used 1073741824 but extent items used 1207959552
> ERROR: block group[3801612288000 1073741824] used 1073741824 but extent items used 1207959552
> ERROR: block group[3828455833600 1073741824] used 1073741824 but extent items used 1207959552
> ERROR: block group[4250973241344 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[4261710659584 1073741824] used 1073741824 but extent items used 1074266112
> ERROR: block group[4392707162112 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[4558063403008 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[4607455526912 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[4635372814336 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[4640204652544 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[4642352136192 1073741824] used 1073741824 but extent items used 1207959552
> ERROR: block group[4681006841856 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[5063795802112 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[5171169984512 1073741824] used 1073741824 but extent items used 1207959552
> ERROR: block group[5216267141120 1073741824] used 1073741824 but extent items used 1207959552
> ERROR: block group[5290355326976 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[5445511020544 1073741824] used 1073741824 but extent items used 1074266112
> ERROR: block group[6084387405824 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[6104788500480 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[6878956355584 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[6997067956224 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[7702516334592 1073741824] used 1073741824 but extent items used 0
> ERROR: block group[8051482427392 1073741824] used 1073741824 but extent items used 1084751872
> ERROR: block group[8116980678656 1073741824] used 1073741824 but extent items used 0
> ERROR: errors found in extent allocation tree or chunk allocation
> checking free space cache
> checking fs roots
> Checking filesystem on /dev/nbd0
> UUID: 326d292d-f97b-43ca-b1e8-c722d3474719
> found 7519512838144 bytes used err is -5
> total csum bytes: 7330834320
> total tree bytes: 10902437888
> total fs tree bytes: 2019704832
> total extent tree bytes: 1020149760
> btree space waste bytes: 925714197
> file data blocks allocated: 7509228494848
>  referenced 7630551511040
> 1
> => error still occurs *without* patch
>
> => increased VM memory here
>
> # btrfs check /dev/nbd0 ; echo $?
> checking extents
> checking free space cache
> checking fs roots
> checking csums
> checking root refs
> Checking filesystem on /dev/nbd0
> UUID: 326d292d-f97b-43ca-b1e8-c722d3474719
> found 7519512838144 bytes used err is 0
> total csum bytes: 7330834320
> total tree bytes: 10902437888
> total fs tree bytes: 2019704832
> total extent tree bytes: 1020149760
> btree space waste bytes: 925714197
> file data blocks allocated: 7509228494848
>  referenced 7630551511040
> 0
> => same as before
>
>
>
>
> btrfs-progs v4.9 WITH patches:
> ******************************
> # btrfs check /dev/nbd0 ; echo $?
> checking extents
> checking free space
> cache
> checking fs roots
> checking csums
> checking root refs
> Checking
> filesystem on /dev/nbd0
> UUID: 326d292d-f97b-43ca-b1e8-c722d3474719
> found
> 7519512838144 bytes used, no error found
> total csum bytes: 7330834320
> tot
> al tree bytes: 10902437888
> total fs tree bytes: 2019704832
> total extent
> tree bytes: 1020149760
> btree space waste bytes: 925714197
> file data
> blocks allocated: 7509228494848
>  referenced 7630551511040
> 0
> => same as
> before
>
> # btrfs check --mode=lowmem /dev/nbd0 ; echo $?
> checking extents
> checking free space cache
> checking fs roots
> ERROR: errors found in fs roots
> Checking filesystem on /dev/nbd0
> UUID: 326d292d-f97b-43ca-b1e8-c722d3474719
> found 7519512838144 bytes used, error(s) found
> total csum bytes: 7330834320
> total tree bytes: 10902437888
> total fs tree bytes: 2019704832
> total extent tree bytes: 1020149760
> btree space waste bytes: 925714197
> file data blocks allocated: 7509228494848
>  referenced 7630551511040
> 1
>
> => Unfortunately :-(

That's embarrassing now.

At least the file extent bug is gone.

But still some new error is exposed, even without error message now.

I'll keep digging.

Thanks,
Qu
>
>
>
> Cheers,
> Chris.
>

Re: [PATCH 0/9] Lowmem mode fsck fixes with fsck-tests framework update

[Qu Wenruo]

At 02/02/2017 08:25 AM, Qu Wenruo wrote:
> Thanks for your test.
>
> At 02/02/2017 06:03 AM, Christoph Anton Mitterer wrote:
>> On Wed, 2017-02-01 at 09:06 +0800, Qu Wenruo wrote:
>>> https://github.com/adam900710/btrfs-progs/tree/lowmem_fixes
>>>
>>> Which is also rebased to latest v4.9.1.
>>
>> Same game as last time, applied to 4.9, no RW mount between the runs.
>>
>>
[snipped]
>> => same as
>> before
>>
>> # btrfs check --mode=lowmem /dev/nbd0 ; echo $?
>> checking extents
>> checking free space cache
>> checking fs roots
>> ERROR: errors found in fs roots
>> Checking filesystem on /dev/nbd0
>> UUID: 326d292d-f97b-43ca-b1e8-c722d3474719
>> found 7519512838144 bytes used, error(s) found
>> total csum bytes: 7330834320
>> total tree bytes: 10902437888
>> total fs tree bytes: 2019704832
>> total extent tree bytes: 1020149760
>> btree space waste bytes: 925714197
>> file data blocks allocated: 7509228494848
>>  referenced 7630551511040
>> 1
>>
>> => Unfortunately :-(
>

Would you please to check the latest lowmem_tests branch?
https://github.com/adam900710/btrfs-progs/tree/lowmem_tests

This time I added several debug output to catch the whole path where the 
silent error happens, to help us to solve the problem.

Sorry for the extra trouble.

Thanks,
Qu

Re: [PATCH 0/9] Lowmem mode fsck fixes with fsck-tests framework update

[Qu Wenruo]

At 02/03/2017 01:08 PM, Christoph Anton Mitterer wrote:
> Hey Qu.
>
> I'm sending this off-list for privacy reasons of the contained file-
> names / hash sums.
> It doesn't contained anything particularly secret, nevertheless, please
>  try to avoid spreading it too far around and delete it once you don't
> need it anymore :)
>
> On Thu, 2017-02-02 at 10:12 +0800, Qu Wenruo wrote:
>> Would you please to check the latest lowmem_tests branch?
>> https://github.com/adam900710/btrfs-progs/tree/lowmem_tests
>
> Invocation was as usual:
> # btrfs check --mode=lowmem /dev/nbd0 ; echo $?
>
> stdout/err output in the attachment

Great thanks for that!

Although I made a mistake in the debug patch, the output info is still 
good enough for me to catch the bug in inline extent check.

I also added missing error message output for other places I found, and 
updated the branch, the name remains as "lowmem_tests"

Please try it.

Thanks,
Qu

>
>
>> Sorry for the extra trouble.
> No worries :)
>
>
> Cheers,
> Chris.
>

Re: [PATCH 0/9] Lowmem mode fsck fixes with fsck-tests framework update

[Christoph Anton Mitterer]

[-- Attachment #1: Type: text/plain, Size: 1530 bytes --]

Hey Qu

On Fri, 2017-02-03 at 14:20 +0800, Qu Wenruo wrote:
> Great thanks for that!
You're welcome. :)


> I also added missing error message output for other places I found,
> and 
> updated the branch, the name remains as "lowmem_tests"
> 
> Please try it.
# btrfs check /dev/nbd0 ; echo $?
checking extents
checking free space cache
checking fs roots
checking csums
checking root refs
Checking filesystem on /dev/nbd0
UUID: 326d292d-f97b-43ca-b1e8-c722d3474719
found 7519512838144 bytes used, no error found
total csum bytes: 7330834320
total tree bytes: 10902437888
total fs tree bytes: 2019704832
total extent tree bytes: 1020149760
btree space waste bytes: 925714197
file data blocks allocated: 7509228494848
 referenced 7630551511040
0

# btrfs check /dev/nbd0 ; echo $?
checking extents
checking free space cache
checking fs roots
checking csums
checking root refs
Checking filesystem on /dev/nbd0
UUID: 326d292d-f97b-43ca-b1e8-c722d3474719
found 7519512838144 bytes used, no error found
total csum bytes: 7330834320
total tree bytes: 10902437888
total fs tree bytes: 2019704832
total extent tree bytes: 1020149760
btree space waste bytes: 925714197
file data blocks allocated: 7509228494848
 referenced 7630551511040
0

=> looks good this time :)


btw: In your commit messages, please change my email to
calestyo@scientia.net everywhere... I accidentally used my university
address (christoph.anton.mitterer@lmu.de) sometimes when sending mail.

Cheers,
Chris.

[-- Attachment #2: smime.p7s --]
[-- Type: application/x-pkcs7-signature, Size: 5930 bytes --]

Re: [PATCH 0/9] Lowmem mode fsck fixes with fsck-tests framework update

[Qu Wenruo]

At 02/04/2017 07:01 AM, Christoph Anton Mitterer wrote:
> Hey Qu
>
> On Fri, 2017-02-03 at 14:20 +0800, Qu Wenruo wrote:
>> Great thanks for that!
> You're welcome. :)
>
>
>> I also added missing error message output for other places I found,
>> and
>> updated the branch, the name remains as "lowmem_tests"
>>
>> Please try it.
> # btrfs check /dev/nbd0 ; echo $?
> checking extents
> checking free space cache
> checking fs roots
> checking csums
> checking root refs
> Checking filesystem on /dev/nbd0
> UUID: 326d292d-f97b-43ca-b1e8-c722d3474719
> found 7519512838144 bytes used, no error found
> total csum bytes: 7330834320
> total tree bytes: 10902437888
> total fs tree bytes: 2019704832
> total extent tree bytes: 1020149760
> btree space waste bytes: 925714197
> file data blocks allocated: 7509228494848
>  referenced 7630551511040
> 0
>
> # btrfs check /dev/nbd0 ; echo $?
> checking extents
> checking free space cache
> checking fs roots
> checking csums
> checking root refs
> Checking filesystem on /dev/nbd0
> UUID: 326d292d-f97b-43ca-b1e8-c722d3474719
> found 7519512838144 bytes used, no error found
> total csum bytes: 7330834320
> total tree bytes: 10902437888
> total fs tree bytes: 2019704832
> total extent tree bytes: 1020149760
> btree space waste bytes: 925714197
> file data blocks allocated: 7509228494848
>  referenced 7630551511040
> 0
>
> => looks good this time :)

Great!

>
>
> btw: In your commit messages, please change my email to
> calestyo@scientia.net everywhere... I accidentally used my university
> address (christoph.anton.mitterer@lmu.de) sometimes when sending mail.

Not a problem.

I'll change the address and re-send the patchset to mail list.

Thanks,
Qu

>
> Cheers,
> Chris.
>