linux.git/fs/f2fs/extent_cache.c, branch v4.13

f2fs: fix a bug caused by NULL extent tree

2017-05-24T04:07:18+00:00

Thread A:					Thread B:

-f2fs_remount
    -sbi->mount_opt.opt = 0;
						<--- -f2fs_iget
						         -do_read_inode
							     -f2fs_init_extent_tree
							         -F2FS_I(inode)->extent_tree is NULL
        -default_options && parse_options
	    -remount return
						<---  -f2fs_map_blocks
						          -f2fs_lookup_extent_tree
                                                              -f2fs_bug_on(sbi, !et);

The same problem with f2fs_new_inode.

Signed-off-by: Yunlei He 
Signed-off-by: Jaegeuk Kim

f2fs: introduce __check_rb_tree_consistence

2017-04-19T18:00:44+00:00

Introduce __check_rb_tree_consistence to check consistence of rb-tree
based discard cache in runtime.

Signed-off-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: use rb-tree to track pending discard commands

2017-04-19T18:00:40+00:00

Introduce rb-tree based discard cache infrastructure to speed up lookup and
merge operation of discard entry.

Signed-off-by: Chao Yu 
[Jaegeuk Kim: initialize dc to avoid build warning]
Signed-off-by: Jaegeuk Kim

f2fs: extract rb-tree operation infrastructure

2017-04-11T22:13:52+00:00

rb-tree lookup/update functions are deeply coupled into extent cache
codes, it's very hard to reuse these basic functions, this patch
extracts common rb-tree operation infrastructure for latter reusing.

Signed-off-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: kill __is_extent_same

2017-02-27T18:07:43+00:00

Since commit ee6d182f2a19 ("f2fs: remove syncing inode page in all the
cases") delayed inode element updating from inode cache to node page
cache, so once largest cached extent is updated, we can make inode dirty
immediately instead of checking and updating it in the end of extent
cache update.

The above commit didn't clean up unneeded codes in extent_cache.c, let's
finish the job in this patch.

Signed-off-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: replace rw semaphore extent_tree_lock with mutex lock

2017-02-27T17:59:53+00:00

This patch replace rw semaphore extent_tree_lock with mutex lock
for no read cases with this lock.

Signed-off-by: Yunlei He 
Signed-off-by: Jaegeuk Kim

f2fs: use rb_entry_safe

2017-01-29T03:46:01+00:00

Use rb_entry_safe() instead of open-coding it.

Signed-off-by: Geliang Tang 
Signed-off-by: Jaegeuk Kim

f2fs: fix a problem of using memory after free

2017-01-29T03:46:01+00:00

This patch fix a problem of using memory after free
in function __try_merge_extent_node.

Fixes: 0f825ee6e873 ("f2fs: add new interfaces for extent tree")
Cc: 
Signed-off-by: Yunlei He 
Reviewed-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: keep dirty inodes selectively for checkpoint

2016-11-23T20:11:08+00:00

This is to avoid no free segment bug during checkpoint caused by a number of
dirty inodes.

The case was reported by Chao like this.
1. mount with lazytime option
2. fill 4k file until disk is full
3. sync filesystem
4. read all files in the image
5. umount

In this case, we actually don't need to flush dirty inode to inode page during
checkpoint.

Reviewed-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: disable extent_cache for fcollapse/finsert inodes

2016-07-15T22:21:20+00:00

This reduces the elapsed time to do xfstests/generic/017.

Before: 458 s
After:  390 s

Signed-off-by: Jaegeuk Kim