LiFan 5921aaa185 f2fs: fix concurrent problem for updating free bitmap ...

alloc_nid_failed and scan_nat_page can be called at the same time,
and we haven't protected add_free_nid and update_free_nid_bitmap
with the same nid_list_lock. That could lead to

Thread A				Thread B
- __build_free_nids
 - scan_nat_page
  - add_free_nid
					- alloc_nid_failed
					 - update_free_nid_bitmap
  - update_free_nid_bitmap

scan_nat_page will clear the free bitmap since the nid is PREALLOC_NID,
but alloc_nid_failed needs to set the free bitmap. This results in
free nid with free bitmap cleared.
This patch update the bitmap under the same nid_list_lock in add_free_nid.
And use __GFP_NOFAIL to make sure to update status of free nid correctly.

Signed-off-by: Fan li <fanofcode.li@samsung.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

2018-01-02 19:27:27 -08:00

..

acl.c

f2fs: stop all the operations by cp_error flag

2017-11-05 16:41:43 -08:00

acl.h

f2fs: remove dead code f2fs_check_acl

2016-09-14 16:52:36 -07:00

checkpoint.c

Rename superblock flags (MS_xyz -> SB_xyz)

2017-11-27 13:05:09 -08:00

data.c

f2fs-for-4.15-rc1

2017-11-16 12:10:21 -08:00

debug.c

f2fs: remove unneeded memory footprint accounting

2018-01-02 19:27:27 -08:00

dir.c

f2fs: update ctx->pos correctly when hitting hole in directory

2017-10-26 10:44:20 +02:00

extent_cache.c

f2fs: fix a bug caused by NULL extent tree

2017-05-23 21:07:18 -07:00

f2fs.h

f2fs: reserve nid resource for quota sysfile

2018-01-02 19:27:26 -08:00

file.c

f2fs-for-4.15-rc1

2017-11-16 12:10:21 -08:00

gc.c

Rename superblock flags (MS_xyz -> SB_xyz)

2017-11-27 13:05:09 -08:00

gc.h

f2fs: fix potential overflow when adjusting GC cycle

2017-08-15 10:40:14 -07:00

hash.c

f2fs: check entire encrypted bigname when finding a dentry

2017-05-04 11:44:35 -04:00

inline.c

f2fs: enhance multiple device flush

2017-10-10 12:49:53 -07:00

inode.c

f2fs-for-4.15-rc1

2017-11-16 12:10:21 -08:00

Kconfig

f2fs: add mount option to select fault injection ratio

2016-05-07 10:32:22 -07:00

Makefile

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

namei.c

f2fs: support flexible inline xattr size

2017-11-05 16:41:50 -08:00

node.c

f2fs: fix concurrent problem for updating free bitmap

2018-01-02 19:27:27 -08:00

node.h

f2fs: limit # of inmemory pages

2017-10-26 10:44:21 +02:00

recovery.c

Rename superblock flags (MS_xyz -> SB_xyz)

2017-11-27 13:05:09 -08:00

segment.c

f2fs: apply write hints to select the type of segments for buffered write

2017-11-09 10:18:16 -08:00

segment.h

f2fs: check curseg space before foreground GC

2017-11-05 16:42:04 -08:00

shrinker.c

f2fs: obsolete ALLOC_NID_LIST list

2017-10-10 12:49:53 -07:00

super.c

f2fs: reserve nid resource for quota sysfile

2018-01-02 19:27:26 -08:00

sysfs.c

f2fs: add quota_ino feature infra

2017-11-05 16:42:01 -08:00

trace.c

f2fs: use set_page_private marcro in f2fs_trace_pid

2017-03-24 15:10:49 -04:00

trace.h

f2fs: add sbi and page pointer in f2fs_io_info

2015-05-28 15:41:32 -07:00

xattr.c

f2fs: handle error case when adding xattr entry

2017-11-05 16:41:51 -08:00

xattr.h

f2fs: guard macro variables with braces

2017-04-10 19:48:10 -07:00