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authorHuajun Li <huajun.li.lee@gmail.com>2012-12-31 13:59:04 +0800
committerJaegeuk Kim <jaegeuk.kim@samsung.com>2013-01-04 09:42:59 +0900
commit9268cc3523c120eed04a6ad980753d6e7b82d071 (patch)
treed833984384d1ffc5451054f48b8350a8cbfa40af /Documentation
parent24c366a9ea256b86426b42e75f764495a2558861 (diff)
f2fs: update f2fs document to reflect SIT/NAT layout correctly
document to reflect the layout generated by mkfs.f2fs . Signed-off-by: Huajun Li <huajun.li.lee@gmail.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/filesystems/f2fs.txt18
1 files changed, 9 insertions, 9 deletions
diff --git a/Documentation/filesystems/f2fs.txt b/Documentation/filesystems/f2fs.txt
index 8fbd8b46ee3..dcf338e62b7 100644
--- a/Documentation/filesystems/f2fs.txt
+++ b/Documentation/filesystems/f2fs.txt
@@ -175,9 +175,9 @@ consists of multiple segments as described below.
align with the zone size <-|
|-> align with the segment size
_________________________________________________________________________
- | | | Node | Segment | Segment | |
- | Superblock | Checkpoint | Address | Info. | Summary | Main |
- | (SB) | (CP) | Table (NAT) | Table (SIT) | Area (SSA) | |
+ | | | Segment | Node | Segment | |
+ | Superblock | Checkpoint | Info. | Address | Summary | Main |
+ | (SB) | (CP) | Table (SIT) | Table (NAT) | Area (SSA) | |
|____________|_____2______|______N______|______N______|______N_____|__N___|
. .
. .
@@ -200,14 +200,14 @@ consists of multiple segments as described below.
: It contains file system information, bitmaps for valid NAT/SIT sets, orphan
inode lists, and summary entries of current active segments.
-- Node Address Table (NAT)
- : It is composed of a block address table for all the node blocks stored in
- Main area.
-
- Segment Information Table (SIT)
: It contains segment information such as valid block count and bitmap for the
validity of all the blocks.
+- Node Address Table (NAT)
+ : It is composed of a block address table for all the node blocks stored in
+ Main area.
+
- Segment Summary Area (SSA)
: It contains summary entries which contains the owner information of all the
data and node blocks stored in Main area.
@@ -236,13 +236,13 @@ For file system consistency, each CP points to which NAT and SIT copies are
valid, as shown as below.
+--------+----------+---------+
- | CP | NAT | SIT |
+ | CP | SIT | NAT |
+--------+----------+---------+
. . . .
. . . .
. . . .
+-------+-------+--------+--------+--------+--------+
- | CP #0 | CP #1 | NAT #0 | NAT #1 | SIT #0 | SIT #1 |
+ | CP #0 | CP #1 | SIT #0 | SIT #1 | NAT #0 | NAT #1 |
+-------+-------+--------+--------+--------+--------+
| ^ ^
| | |