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| author | Changman Lee <cm224.lee@samsung.com> | 2014-05-12 12:27:43 +0900 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2014-06-04 13:34:30 +0900 |
| commit | 1dbe4152168d44fa164edbdc9f1243de70b98f7a (patch) | |
| tree | 205318206e29db519ad1aad5e8042ae879c77184 /fs/f2fs/f2fs.h | |
| parent | bac4eef6537a663585f3fb3d633a629c72e3b73d (diff) | |
| download | lwn-1dbe4152168d44fa164edbdc9f1243de70b98f7a.tar.gz lwn-1dbe4152168d44fa164edbdc9f1243de70b98f7a.zip | |
f2fs: large volume support
f2fs's cp has one page which consists of struct f2fs_checkpoint and
version bitmap of sit and nat. To support lots of segments, we need more
blocks for sit bitmap. So let's arrange sit bitmap as following:
+-----------------+------------+
| f2fs_checkpoint | sit bitmap |
| + nat bitmap | |
+-----------------+------------+
0 4k N blocks
Signed-off-by: Changman Lee <cm224.lee@samsung.com>
[Jaegeuk Kim: simple code change for readability]
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/f2fs.h')
| -rw-r--r-- | fs/f2fs/f2fs.h | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 676a2c6ccec7..9684b1f77a7d 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -764,9 +764,18 @@ static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag) static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag) { struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); - int offset = (flag == NAT_BITMAP) ? + int offset; + + if (le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload) > 0) { + if (flag == NAT_BITMAP) + return &ckpt->sit_nat_version_bitmap; + else + return ((unsigned char *)ckpt + F2FS_BLKSIZE); + } else { + offset = (flag == NAT_BITMAP) ? le32_to_cpu(ckpt->sit_ver_bitmap_bytesize) : 0; - return &ckpt->sit_nat_version_bitmap + offset; + return &ckpt->sit_nat_version_bitmap + offset; + } } static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi) |