linux.git/fs/f2fs/node.h, branch v3.13

f2fs: fix the use of XATTR_NODE_OFFSET

2013-08-09T05:57:56+00:00

This patch fixes the use of XATTR_NODE_OFFSET.

o The offset should not use several MSB bits which are used by marking node
blocks.

o IS_DNODE should handle XATTR_NODE_OFFSET to avoid potential abnormality
during the fsync call.

Signed-off-by: Jaegeuk Kim

f2fs: introduce help function F2FS_NODE()

2013-07-30T06:17:02+00:00

Introduce help function F2FS_NODE() to simplify the conversion of node_page to
f2fs_node.

Signed-off-by: Gu Zheng 
Signed-off-by: Jaegeuk Kim

f2fs: recover wrong pino after checkpoint during fsync

2013-06-14T00:04:45+00:00

If a file is linked, f2fs loose its parent inode number so that fsync calls
for the linked file should do checkpoint all the time.
But, if we can recover its parent inode number after the checkpoint, we can
adjust roll-forward mechanism for the further fsync calls, which is able to
improve the fsync performance significatly.

Signed-off-by: Jaegeuk Kim

f2fs: optimize several routines in node.h

2013-05-28T06:03:05+00:00

There are various functions with common code which could be separated
out to make common routines. So, made new routines and in order to
retain the same call path and no major changes, written some macros
to access those routines.

Signed-off-by: Namjae Jeon 
Signed-off-by: Amit Sahrawat 
Signed-off-by: Jaegeuk Kim

f2fs: fix the logic of IS_DNODE()

2013-04-09T09:21:24+00:00

If (ofs % (NIDS_PER_BLOCK + 1) == 0), the node is an indirect node block.

Signed-off-by: Zhihui Zhang 
Signed-off-by: Jaegeuk Kim

f2fs: remove redundant lock_page calls

2013-04-03T08:27:42+00:00

In get_node_page, we do not need to call lock_page all the time.

If the node page is cached as uptodate,

1. grab_cache_page locks the page,
2. read_node_page unlocks the page, and
3. lock_page is called for further process.

Let's avoid this.

Reviewed-by: Namjae Jeon 
Signed-off-by: Jaegeuk Kim

f2fs: fix to give correct parent inode number for roll forward

2013-03-27T00:16:25+00:00

When we recover fsync'ed data after power-off-recovery, we should guarantee
that any parent inode number should be correct for each direct inode blocks.

So, let's make the following rules.

- The fsync should do checkpoint to all the inodes that were experienced hard
links.

- So, the only normal files can be recovered by roll-forward.

Signed-off-by: Jaegeuk Kim

f2fs: adjust kernel coding style

2012-12-11T04:43:42+00:00

As pointed out by Randy Dunlap, this patch removes all usage of "/**" for comment
blocks. Instead, just use "/*".

Signed-off-by: Jaegeuk Kim

f2fs: fix endian conversion bugs reported by sparse

2012-12-11T04:43:42+00:00

This patch should resolve the bugs reported by the sparse tool.
Initial reports were written by "kbuild test robot" managed by fengguang.wu.

In my local machines, I've tested also by running:
> make C=2 CF="-D__CHECK_ENDIAN__"

Accordingly, I've found lots of warnings and bugs related to the endian
conversion. And I've fixed all at this moment.

Signed-off-by: Jaegeuk Kim

f2fs: add superblock and major in-memory structure

2012-12-11T04:43:40+00:00

This adds the following major in-memory structures in f2fs.

- f2fs_sb_info:
  contains f2fs-specific information, two special inode pointers for node and
  meta address spaces, and orphan inode management.

- f2fs_inode_info:
  contains vfs_inode and other fs-specific information.

- f2fs_nm_info:
  contains node manager information such as NAT entry cache, free nid list,
  and NAT page management.

- f2fs_node_info:
  represents a node as node id, inode number, block address, and its version.

- f2fs_sm_info:
  contains segment manager information such as SIT entry cache, free segment
  map, current active logs, dirty segment management, and segment utilization.
  The specific structures are sit_info, free_segmap_info, dirty_seglist_info,
  curseg_info.

In addition, add F2FS_SUPER_MAGIC in magic.h.

Signed-off-by: Chul Lee 
Signed-off-by: Jaegeuk Kim