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f2fs: add superblock and major in-memory structure

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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 <chur.lee@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
This commit is contained in:
Jaegeuk Kim
2012-11-28 13:37:31 +09:00
parent dd31866b0d
commit 39a53e0ce0
4 changed files with 2031 additions and 0 deletions
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include/uapi/linux/magic.h
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@@ -23,6 +23,7 @@
#define EXT4_SUPER_MAGIC 0xEF53
#define BTRFS_SUPER_MAGIC 0x9123683E
#define NILFS_SUPER_MAGIC 0x3434
#define F2FS_SUPER_MAGIC 0xF2F52010
#define HPFS_SUPER_MAGIC 0xf995e849
#define ISOFS_SUPER_MAGIC 0x9660
#define JFFS2_SUPER_MAGIC 0x72b6