linux-stable.git/fs/f2fs/inline.c, branch v3.16

f2fs: avoid grab_cache_page_write_begin for data pages

2014-05-07T01:21:58+00:00

We don't need to wait on page writeback for these cases.

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

f2fs: split grab_cache_page and wait_on_page_writeback for node pages

2014-05-07T01:21:58+00:00

This patch splits grab_cache_page_write_begin into grab_cache_page and
wait_on_page_writeback for node pages.

This patch intends to enhance the latency to get node pages by alleviating
unnecessary wait_on_page_writeback.

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

f2fs: fix to truncate inline data in inode page when setattr

2014-05-07T01:21:58+00:00

Previous we do not truncate inline data in inode page when setattr, so following
case could still read the inline data which has already truncated:

1.write inline data
2.ftruncate size to 0
3.ftruncate size to max inline data size
4.read from offset 0

This patch introduces truncate_inline_data() to fix this problem.

change log from v1:
 o fix a bug and do not truncate first page data after truncate inline data.

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

f2fs: fix to unlock f2fs_lock at the omitted error case

2014-05-07T01:21:54+00:00

If it occurs an error, we should call f2fs_unlock_op.

Signed-off-by: Jaegeuk Kim

f2fs: fix error path when fail to read inline data

2014-04-02T00:56:27+00:00

We should unlock page in ->readpage() path and also should unlock & release page
in error path of ->write_begin() to avoid deadlock or memory leak.
So let's add release code to fix the problem when we fail to read inline data.

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

f2fs: remove the needless parameter of f2fs_wait_on_page_writeback

2014-01-14T08:45:54+00:00

"boo sync" parameter is never referenced in f2fs_wait_on_page_writeback.
We should remove this parameter.

Signed-off-by: Yuan Zhong 
Signed-off-by: Jaegeuk Kim

f2fs: avoid to read inline data except first page

2014-01-06T07:42:22+00:00

Here is a case which could read inline page data not from first page.

1. write inline data
2. lseek to offset 4096
3. read 4096 bytes from offset 4096
	(read_inline_data read inline data page to non-first page,
	And previously VFS has add this page to page cache)
4. ftruncate offset 8192
5. read 4096 bytes from offset 4096
	(we meet this updated page with inline data in cache)

So we should leave this page with inited data and uptodate flag
for this case.

Change log from v1:
 o fix a deadlock bug

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

f2fs: avoid to left uninitialized data in page when read inline data

2014-01-06T07:42:22+00:00

Change log from v1:
 o reduce unneeded memset in __f2fs_convert_inline_data

>From 58796be2bd2becbe8d52305210fb2a64e7dd80b6 Mon Sep 17 00:00:00 2001
From: Chao Yu 
Date: Mon, 30 Dec 2013 09:21:33 +0800
Subject: [PATCH] f2fs: avoid to left uninitialized data in page when read
 inline data

We left uninitialized data in the tail of page when we read an inline data
page. So let's initialize left part of the page excluding inline data region.

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

f2fs: handle errors correctly during f2fs_reserve_block

2014-01-06T07:42:21+00:00

The get_dnode_of_data nullifies inode and node page when error is occurred.

There are two cases that passes inode page into get_dnode_of_data().

1. make_empty_dir()
    -> get_new_data_page()
      -> f2fs_reserve_block(ipage)
	-> get_dnode_of_data()

2. f2fs_convert_inline_data()
    -> __f2fs_convert_inline_data()
      -> f2fs_reserve_block(ipage)
	-> get_dnode_of_data()

This patch adds correct error handling codes when get_dnode_of_data() returns
an error.

At first, f2fs_reserve_block() calls f2fs_put_dnode() whenever reserve_new_block
returns an error.
So, the rule of f2fs_reserve_block() is to nullify inode page when there is any
error internally.

Finally, two callers of f2fs_reserve_block() should call f2fs_put_dnode()
appropriately if they got an error since successful f2fs_reserve_block().

Signed-off-by: Jaegeuk Kim

f2fs: add inline_data recovery routine

2014-01-06T07:42:20+00:00

This patch adds a inline_data recovery routine with the following policy.

[prev.] [next] of inline_data flag
   o       o  -> recover inline_data
   o       x  -> remove inline_data, and then recover data blocks
   x       o  -> remove inline_data, and then recover inline_data
   x       x  -> recover data blocks

Signed-off-by: Jaegeuk Kim