[PATCH 1/2] common/config: export F2FS_RESIZE_PROG

[PATCH 1/2] common/config: export F2FS_RESIZE_PROG

[Yangyang Zang]

export F2FS_RESIZE_PROG w/ resize.f2fs, it can be used for resize f2fs.

Cc: Jaegeuk Kim <jaegeuk@kernel.org>
Cc: Chao Yu <chao@kernel.org>
Signed-off-by: Yangyang Zang <zangyangyang1@xiaomi.com>
---
 common/config | 1 +
 1 file changed, 1 insertion(+)

diff --git a/common/config b/common/config
index 1420e35ddfee..d95b3226e85f 100644
--- a/common/config
+++ b/common/config
@@ -309,6 +309,7 @@ export DUMP_F2FS_PROG=$(type -P dump.f2fs)
 export F2FS_IO_PROG=$(type -P f2fs_io)
 export F2FS_INJECT_PROG=$(type -P inject.f2fs)
 export F2FS_FSCK_PROG=$(type -P fsck.f2fs)
+export F2FS_RESIZE_PROG=$(type -P resize.f2fs)
 export BTRFS_UTIL_PROG=$(type -P btrfs)
 export BTRFS_SHOW_SUPER_PROG=$(type -P btrfs-show-super)
 export BTRFS_CONVERT_PROG=$(type -P btrfs-convert)
-- 
2.43.2

[PATCH 2/2] f2fs/024: add testcase to check resize corrupting root inode

[Yangyang Zang]

This is a regression test to check whether the f2fs root inode
is corrupted after the resize operation.
During the resize operation, SSA data blocks are migrated and
zeroed. This process may incorrectly zero out the main area
blocks, leading to root inode corruption.

Cc: Jaegeuk Kim <jaegeuk@kernel.org>
Cc: Chao Yu <chao@kernel.org>
Signed-off-by: Yangyang Zang <zangyangyang1@xiaomi.com>
---
 tests/f2fs/024     | 39 +++++++++++++++++++++++++++++++++++++++
 tests/f2fs/024.out |  7 +++++++
 2 files changed, 46 insertions(+)
 create mode 100644 tests/f2fs/024
 create mode 100644 tests/f2fs/024.out

diff --git a/tests/f2fs/024 b/tests/f2fs/024
new file mode 100644
index 000000000000..1ca7ee27c18b
--- /dev/null
+++ b/tests/f2fs/024
@@ -0,0 +1,39 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2026 Yangyang Zang.  All Rights Reserved.
+#
+# FS QA Test No. f2fs/024
+#
+# This test case tries to check whether resize.f2fs can correctly
+# zero out ssa blocks without corrupting the main area blocks.
+#
+. ./common/preamble
+_begin_fstest auto quick
+
+_fixed_by_git_commit f2fs-tools xxxxxxxxxxxx \
+	"resize.f2fs: fix to avoid zeroing main area blocks in migrate_ssa()"
+
+# magic size
+target_fs_size=$((2*1024*1024*1024+4*1024*1204))
+
+_require_scratch_size_nocheck $(($target_fs_size/1024))
+_require_command "$F2FS_RESIZE_PROG" resize.f2fs
+_require_command "$DUMP_F2FS_PROG" dump.f2fs
+
+# remove all mkfs options to avoid layout change of on-disk inode
+export MKFS_OPTIONS=""
+
+_scratch_mkfs_sized $((512*1024*1024)) "" "-g android" >> $seqres.full
+
+sector_size=$(blockdev --getss $SCRATCH_DEV)
+target_sectors=$(($target_fs_size/$sector_size))
+
+$F2FS_RESIZE_PROG -F $SCRATCH_DEV -t $target_sectors >> $seqres.full 2>&1 || \
+        $F2FS_RESIZE_PROG $SCRATCH_DEV -t $target_sectors >> $seqres.full 2>&1 || \
+        _fail "resize fs failed"
+
+echo n | $DUMP_F2FS_PROG -d 1 -i 3 $SCRATCH_DEV | grep "dump_node:" | sed 's/^\[[^]]*\] //'
+_scratch_mount
+
+status=0
+exit
diff --git a/tests/f2fs/024.out b/tests/f2fs/024.out
new file mode 100644
index 000000000000..a7a553f0681b
--- /dev/null
+++ b/tests/f2fs/024.out
@@ -0,0 +1,7 @@
+QA output created by 024
+Node ID               [0x3]
+nat_entry.block_addr  [0x1a00]
+nat_entry.version     [0x0]
+nat_entry.ino         [0x3]
+node_blk.footer.ino [0x3]
+node_blk.footer.nid [0x3]
-- 
2.43.2

Re: [PATCH 1/2] common/config: export F2FS_RESIZE_PROG

[Chao Yu]

On 3/19/26 11:35, Yangyang Zang wrote:
> export F2FS_RESIZE_PROG w/ resize.f2fs, it can be used for resize f2fs.
> 
> Cc: Jaegeuk Kim <jaegeuk@kernel.org>
> Cc: Chao Yu <chao@kernel.org>
> Signed-off-by: Yangyang Zang <zangyangyang1@xiaomi.com>

Reviewed-by: Chao Yu <chao@kernel.org>

Thanks,

Re: [PATCH 2/2] f2fs/024: add testcase to check resize corrupting root inode

[Chao Yu]

On 3/19/26 11:35, Yangyang Zang wrote:
> This is a regression test to check whether the f2fs root inode
> is corrupted after the resize operation.
> During the resize operation, SSA data blocks are migrated and
> zeroed. This process may incorrectly zero out the main area
> blocks, leading to root inode corruption.
> 
> Cc: Jaegeuk Kim <jaegeuk@kernel.org>
> Cc: Chao Yu <chao@kernel.org>
> Signed-off-by: Yangyang Zang <zangyangyang1@xiaomi.com>

Reviewed-by: Chao Yu <chao@kernel.org>

Thanks,