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author | Chao Yu <chao@kernel.org> | 2021-08-26 10:03:15 +0800 |
---|---|---|
committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2021-08-30 10:12:47 -0700 |
commit | adf9ea89c719c1d23794e363f631e376b3ff8cbc (patch) | |
tree | 1c1e6f832a99dd9cde4ba4af63d5467fa4fd0589 /fs/f2fs/data.c | |
parent | ad126ebddecbf696e0cf214ff56c7b170fa9f0f7 (diff) | |
download | linux-stable-adf9ea89c719c1d23794e363f631e376b3ff8cbc.tar.gz linux-stable-adf9ea89c719c1d23794e363f631e376b3ff8cbc.tar.bz2 linux-stable-adf9ea89c719c1d23794e363f631e376b3ff8cbc.zip |
f2fs: fix unexpected ENOENT comes from f2fs_map_blocks()
In below path, it will return ENOENT if filesystem is shutdown:
- f2fs_map_blocks
- f2fs_get_dnode_of_data
- f2fs_get_node_page
- __get_node_page
- read_node_page
- is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN)
return -ENOENT
- force return value from ENOENT to 0
It should be fine for read case, since it indicates a hole condition,
and caller could use .m_next_pgofs to skip the hole and continue the
lookup.
However it may cause confusing for write case, since leaving a hole
there, and said nothing was wrong doesn't help.
There is at least one case from dax_iomap_actor() will complain that,
so fix this in prior to supporting dax in f2fs.
xfstest generic/388 reports below warning:
ubuntu godown: xfstests-induced forced shutdown of /mnt/scratch_f2fs:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 485833 at fs/dax.c:1127 dax_iomap_actor+0x339/0x370
Call Trace:
iomap_apply+0x1c4/0x7b0
? dax_iomap_rw+0x1c0/0x1c0
dax_iomap_rw+0xad/0x1c0
? dax_iomap_rw+0x1c0/0x1c0
f2fs_file_write_iter+0x5ab/0x970 [f2fs]
do_iter_readv_writev+0x273/0x2e0
do_iter_write+0xab/0x1f0
vfs_iter_write+0x21/0x40
iter_file_splice_write+0x287/0x540
do_splice+0x37c/0xa60
__x64_sys_splice+0x15f/0x3a0
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x44/0xae
ubuntu godown: xfstests-induced forced shutdown of /mnt/scratch_f2fs:
------------[ cut here ]------------
RIP: 0010:dax_iomap_pte_fault.isra.0+0x72e/0x14a0
Call Trace:
dax_iomap_fault+0x44/0x70
f2fs_dax_huge_fault+0x155/0x400 [f2fs]
f2fs_dax_fault+0x18/0x30 [f2fs]
__do_fault+0x4e/0x120
do_fault+0x3cf/0x7a0
__handle_mm_fault+0xa8c/0xf20
? find_held_lock+0x39/0xd0
handle_mm_fault+0x1b6/0x480
do_user_addr_fault+0x320/0xcd0
? rcu_read_lock_sched_held+0x67/0xc0
exc_page_fault+0x77/0x3f0
? asm_exc_page_fault+0x8/0x30
asm_exc_page_fault+0x1e/0x30
Fixes: 83a3bfdb5a8a ("f2fs: indicate shutdown f2fs to allow unmount successfully")
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/data.c')
-rw-r--r-- | fs/f2fs/data.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index 5e4120b92f59..8e8824605f83 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -1504,7 +1504,21 @@ next_dnode: if (err) { if (flag == F2FS_GET_BLOCK_BMAP) map->m_pblk = 0; + if (err == -ENOENT) { + /* + * There is one exceptional case that read_node_page() + * may return -ENOENT due to filesystem has been + * shutdown or cp_error, so force to convert error + * number to EIO for such case. + */ + if (map->m_may_create && + (is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN) || + f2fs_cp_error(sbi))) { + err = -EIO; + goto unlock_out; + } + err = 0; if (map->m_next_pgofs) *map->m_next_pgofs = |