Bug 218349

Summary: f2fs partitions corrupted during power failures and cannot be fixed with fsck.
Product: File System Reporter: Kane Ch'in (qinfd2023)
Component: f2fsAssignee: Default virtual assignee for f2fs (filesystem_f2fs)
Status: RESOLVED PATCH_ALREADY_AVAILABLE    
Severity: normal CC: chao
Priority: P3    
Hardware: AMD   
OS: Linux   
Kernel Version: Subsystem:
Regression: No Bisected commit-id:

Description Kane Ch'in 2024-01-05 20:11:02 UTC 
I am using some Debian VMs with f2fs root partition for development.
My host machine crashed for some reason and this caused the f2fs partitions in the VMs to become corrupted.
I tried to boot from Debian Live and repair the partitions but failed.

-----------------------------------------------------------
root@debian:/# uname -a
Linux debian 6.1.0-15-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.66-1 (2023-12-09) x86_64 GNU/Linux
root@debian:/# fsck.f2fs -V
fsck.f2fs 1.16.0 (2023-04-11)
root@debian:/# fsck.f2fs -f -d 3 /dev/nvme0n1p2
Info: Force to fix corruption
Info: Debug level = 3
Info: MKFS version
  "Linux version 6.1.0-15-amd64 (debian-kernel@lists.debian.org) (gcc-12 (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40) #1 SMP PREEMPT_DYNAMIC Debian 6.1.66-1 (2023-12-09)"
Info: FSCK version
  from "Linux version 6.1.0-15-amd64 (debian-kernel@lists.debian.org) (gcc-12 (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40) #1 SMP PREEMPT_DYNAMIC Debian 6.1.66-1 (2023-12-09)"
    to "Linux version 6.1.0-15-amd64 (debian-kernel@lists.debian.org) (gcc-12 (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40) #1 SMP PREEMPT_DYNAMIC Debian 6.1.66-1 (2023-12-09)"
Info: superblock features = 0 :
Info: superblock encrypt level = 0, salt = 00000000000000000000000000000000
Info: fs errors: inconsistent_node_count

+--------------------------------------------------------+
| Super block                                            |
+--------------------------------------------------------+
magic                                   [0xf2f52010 : 4076150800]
major_ver                               [0x       1 : 1]
volum_name                              []
minor_ver                               [0x       f : 15]
log_sectorsize                          [0x       9 : 9]
log_sectors_per_block                   [0x       3 : 3]
log_blocksize                           [0x       c : 12]
log_blocks_per_seg                      [0x       9 : 9]
segs_per_sec                            [0x       1 : 1]
secs_per_zone                           [0x       1 : 1]
checksum_offset                         [0x       0 : 0]
block_count                             [0x  efdd00 : 15719680]
section_count                           [0x    7737 : 30519]
segment_count                           [0x    77ed : 30701]
segment_count_ckpt                      [0x       2 : 2]
segment_count_sit                       [0x       4 : 4]
segment_count_nat                       [0x      74 : 116]
segment_count_ssa                       [0x      3c : 60]
segment_count_main                      [0x    7737 : 30519]
segment0_blkaddr                        [0x     200 : 512]
cp_blkaddr                              [0x     200 : 512]
sit_blkaddr                             [0x     600 : 1536]
nat_blkaddr                             [0x     e00 : 3584]
ssa_blkaddr                             [0x    f600 : 62976]
main_blkaddr                            [0x   16e00 : 93696]
root_ino                                [0x       3 : 3]
node_ino                                [0x       1 : 1]
meta_ino                                [0x       2 : 2]
cp_payload                              [0x       0 : 0]
crc                                     [0x       0 : 0]
version                       Linux version 6.1.0-15-amd64 (debian-kernel@lists.debian.org) (gcc-12 (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40) #1 SMP PREEMPT_DYNAMIC Debian 6.1.66-1 (2023-12-09)
Info: Segments per section = 1
Info: Sections per zone = 1
Info: total FS sectors = 125757440 (61405 MB)
Info: CKPT version = 251861d5

+--------------------------------------------------------+
| Checkpoint                                             |
+--------------------------------------------------------+
checkpoint_ver                          [0x251861d5 : 622354901]
user_block_count                        [0x  ea8800 : 15370240]
valid_block_count                       [0x  707851 : 7370833]
rsvd_segment_count                      [0x      fe : 254]
overprov_segment_count                  [0x     1f3 : 499]
free_segment_count                      [0x    36a6 : 13990]
alloc_type[CURSEG_HOT_NODE]             [0x       0 : 0]
alloc_type[CURSEG_WARM_NODE]            [0x       0 : 0]
alloc_type[CURSEG_COLD_NODE]            [0x       0 : 0]
cur_node_segno[0]                       [0x     21e : 542]
cur_node_segno[1]                       [0x     f07 : 3847]
cur_node_segno[2]                       [0x     b47 : 2887]
cur_node_blkoff[0]                      [0x      2e : 46]
cur_node_blkoff[1]                      [0x      dc : 220]
cur_node_blkoff[2]                      [0x      9b : 155]
alloc_type[CURSEG_HOT_DATA]             [0x       0 : 0]
alloc_type[CURSEG_WARM_DATA]            [0x       0 : 0]
alloc_type[CURSEG_COLD_DATA]            [0x       0 : 0]
cur_data_segno[0]                       [0x     ef7 : 3831]
cur_data_segno[1]                       [0x    7583 : 30083]
cur_data_segno[2]                       [0x    2e79 : 11897]
cur_data_blkoff[0]                      [0x     15b : 347]
cur_data_blkoff[1]                      [0x      e2 : 226]
cur_data_blkoff[2]                      [0x       7 : 7]
ckpt_flags                              [0x      c6 : 198]
cp_pack_total_block_count               [0x       5 : 5]
cp_pack_start_sum                       [0x       2 : 2]
valid_node_count                        [0x   e8922 : 952610]
valid_inode_count                       [0x   e7b7c : 949116]
next_free_nid                           [0x   c5355 : 807765]
sit_ver_bitmap_bytesize                 [0x      80 : 128]
nat_ver_bitmap_bytesize                 [0x     e80 : 3712]
checksum_offset                         [0x     ffc : 4092]
elapsed_time                            [0x    549f : 21663]
sit_nat_version_bitmap[0]               [0x      c6 : 198]


do_record_fsync_data: [node] ino = 24573, nid = 0, blkaddr = 2063580
recover_data: ino = 24573, nid = 0, recorded = 0, err = 0
do_record_fsync_data: [node] ino = 471286, nid = 0, blkaddr = 2063581
recover_data: ino = 471286, nid = 0, recorded = 0, err = 0
[ASSERT] (do_record_fsync_data:3475) 0
Comment 2 Kane Ch'in 2024-03-11 01:45:42 UTC 
That works! Thank you for your efforts.
Comment 3 Chao Yu 2024-03-11 03:43:02 UTC 
(In reply to Kane Ch'in from comment #2)
> That works! Thank you for your efforts.

Thank you for the confirmation!

I found above link is expired, let me attach the lore one for who wants check it later.

https://lore.kernel.org/linux-f2fs-devel/20240114182118.38596-1-chao@kernel.org