linux.git/fs/f2fs/inline.c, branch v4.1

f2fs: add F2FS_INLINE_DOTS to recover missing dot dentries

2015-04-10T22:08:57+00:00

If f2fs was corrupted with missing dot dentries, it needs to recover them after
fsck.f2fs detection.

The underlying precedure is:

1. The fsck.f2fs remains F2FS_INLINE_DOTS flag in directory inode, if it detects
missing dot dentries.

2. When f2fs looks up the corrupted directory, it triggers f2fs_add_link with
proper inode numbers and their dot and dotdot names.

3. Once f2fs recovers the directory without errors, it removes F2FS_INLINE_DOTS
finally.

Signed-off-by: Jaegeuk Kim

f2fs: split set_data_blkaddr from f2fs_update_extent_cache

2015-04-10T22:08:49+00:00

Split __set_data_blkaddr from f2fs_update_extent_cache for readability.

Additionally rename __set_data_blkaddr to set_data_blkaddr for exporting.

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

f2fs: enable fast symlink by utilizing inline data

2015-04-10T22:08:48+00:00

Fast symlink can utilize inline data flow to avoid using any
i_addr region, since we need to handle many cases such as
truncation, roll-forward recovery, and fsck/dump tools.

Signed-off-by: Wanpeng Li 
Signed-off-by: Jaegeuk Kim

f2fs: avoid wrong f2fs_bug_on when truncating inline_data

2015-04-10T22:08:46+00:00

This patch removes wrong f2fs_bug_on in truncate_inline_inode.

When there is no space, it can happen a corner case where i_isze is over
MAX_INLINE_SIZE while its inode is still inline_data.

The scenario is
 1. write small data into file #A.
 2. fill the whole partition to 100%.
 3. truncate 4096 on file #A.
 4. write data at 8192 offset.
  --> f2fs_write_begin
    -> -ENOSPC = f2fs_convert_inline_page
    -> f2fs_write_failed
      -> truncate_blocks
        -> truncate_inline_inode
	  BUG_ON, since i_size is 4096.

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

f2fs: fix to truncate inline data past EOF

2015-04-10T22:08:41+00:00

Previously if inode is with inline data, we will try to invalid partial inline
data in page #0 when we truncate size of inode in truncate_partial_data_page().
And then we set page #0 to dirty, after this we can synchronize inode page with
page #0 at ->writepage().

But sometimes we will fail to operate page #0 in truncate_partial_data_page()
due to below reason:
a) if offset is zero, we will skip setting page #0 to dirty.
b) if page #0 is not uptodate, we will fail to update it as it has no mapping
data.

So with following operations, we will meet recent data which should be
truncated.

1.write inline data to file
2.sync first data page to inode page
3.truncate file size to 0
4.truncate file size to max_inline_size
5.echo 1 > /proc/sys/vm/drop_caches
6.read file --> meet original inline data which is remained in inode page.

This patch renames truncate_inline_data() to truncate_inline_inode() for code
readability, then use truncate_inline_inode() to truncate inline data in inode
page in truncate_blocks() and truncate page #0 in truncate_partial_data_page()
for fixing.

v2:
 o truncate partially #0 page in truncate_partial_data_page to avoid keeping
   old data in #0 page.

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

f2fs: introduce universal lookup/update interface for extent cache

2015-03-03T17:58:46+00:00

In this patch, we do these jobs:
1. rename {check,update}_extent_cache to {lookup,update}_extent_info;
2. introduce universal lookup/update interface of extent cache:
f2fs_{lookup,update}_extent_cache including above two real functions, then
export them to function callers.

So after above cleanup, we can add new rb-tree based extent cache into exported
interfaces.

v2:
 o remove "f2fs_" for inner function {lookup,update}_extent_info suggested by
   Jaegeuk Kim.

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

f2fs: introduce f2fs_update_dentry to clean up duplicated codes

2015-03-03T17:58:44+00:00

This patch introduces f2fs_update_dentry to remove redundant code in
f2fs_add_inline_entry and __f2fs_add_link.

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

f2fs: make truncate_inline_date static

2015-02-12T01:04:37+00:00

1. make truncate_inline_date static;
2. remove parameter @from of truncate_inline_date as callers only pass zero.

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

f2fs: clean up to remove parameter

2015-01-10T01:02:26+00:00

This patch uses dn->data_blkaddr as a parameter for the destination block
address.

Signed-off-by: Jaegeuk Kim

f2fs: use f2fs_io_info to clean up messy parameters during IO path

2015-01-10T01:02:23+00:00

This patch cleans up parameters on IO paths.
The key idea is to use f2fs_io_info adding a parameter, block address, and then
use this structure as parameters.

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