Chao Yu 30a61ddf81 f2fs: fix race condition in between free nid allocator/initializer ...

In below concurrent case, allocated nid can be loaded into free nid cache
and be allocated again.

Thread A				Thread B
- f2fs_create
 - f2fs_new_inode
  - alloc_nid
   - __insert_nid_to_list(ALLOC_NID_LIST)
					- f2fs_balance_fs_bg
					 - build_free_nids
					  - __build_free_nids
					   - scan_nat_page
					    - add_free_nid
					     - __lookup_nat_cache
 - f2fs_add_link
  - init_inode_metadata
   - new_inode_page
    - new_node_page
     - set_node_addr
 - alloc_nid_done
  - __remove_nid_from_list(ALLOC_NID_LIST)
					     - __insert_nid_to_list(FREE_NID_LIST)

This patch makes nat cache lookup and free nid list operation being atomical
to avoid this race condition.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

2017-03-24 15:10:50 -04:00

..

acl.c

f2fs: keep dirty inodes selectively for checkpoint

2016-11-23 12:11:08 -08:00

acl.h

f2fs: remove dead code f2fs_check_acl

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

checkpoint.c

f2fs: sanity check of crc_offset from raw checkpoint

2017-03-21 22:34:34 -04:00

data.c

f2fs: fix bad prefetchw of NULL page

2017-03-21 22:34:31 -04:00

debug.c

f2fs: calculate the f2fs_stat_info into base_mem

2017-03-21 22:34:36 -04:00

dir.c

f2fs: cleanup the disk level filename updating

2017-03-21 22:34:33 -04:00

extent_cache.c

f2fs: kill __is_extent_same

2017-02-27 10:07:43 -08:00

f2fs.h

f2fs: cleanup the disk level filename updating

2017-03-21 22:34:33 -04:00

file.c

f2fs: avoid stat_inc_atomic_write for non-atomic file

2017-03-21 22:34:36 -04:00

gc.c

f2fs: fix recording invalid last_victim

2017-03-24 15:10:48 -04:00

gc.h

f2fs: detect idle time depending on user behavior

2016-01-11 15:56:37 -08:00

hash.c

f2fs: introduce dot and dotdot name check

2015-05-28 15:41:34 -07:00

inline.c

f2fs: cleanup the disk level filename updating

2017-03-21 22:34:33 -04:00

inode.c

f2fs: fix wrong error injection for evict_inode

2017-03-21 16:52:16 -04:00

Kconfig

f2fs: add mount option to select fault injection ratio

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

Makefile

fs crypto: move per-file encryption from f2fs tree to fs/crypto

2016-03-17 21:19:33 -07:00

namei.c

f2fs: cleanup the disk level filename updating

2017-03-21 22:34:33 -04:00

node.c

f2fs: fix race condition in between free nid allocator/initializer

2017-03-24 15:10:50 -04:00

node.h

f2fs: adjust the way of calculating nat block

2017-03-21 22:34:27 -04:00

recovery.c

f2fs: change recovery policy of xattr node block

2017-02-23 10:10:52 -08:00

segment.c

f2fs: add a punch discard command function

2017-03-21 22:34:23 -04:00

segment.h

f2fs: update the comment of default nr_pages to skipping

2017-02-27 10:07:46 -08:00

shrinker.c

f2fs: avoid casted negative value as shrink count

2016-11-23 12:11:03 -08:00

super.c

f2fs: add fault injection on f2fs_truncate

2017-03-21 22:34:26 -04:00

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: le16_to_cpu for xattr->e_value_size

2017-03-21 16:52:16 -04:00

xattr.h

f2fs: enhance lookup xattr

2017-02-22 20:24:51 -08:00