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f2fs: check the use of macros on block counts and addresses

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This patch cleans up the existing and new macros for readability.

Rule is like this.

         ,-----------------------------------------> MAX_BLKADDR -,
         |  ,------------- TOTAL_BLKS ----------------------------,
         |  |                                                     |
         |  ,- seg0_blkaddr   ,----- sit/nat/ssa/main blkaddress  |
block    |  | (SEG0_BLKADDR)  | | | |   (e.g., MAIN_BLKADDR)      |
address  0..x................ a b c d .............................
            |                                                     |
global seg# 0...................... m .............................
            |                       |                             |
            |                       `------- MAIN_SEGS -----------'
            `-------------- TOTAL_SEGS ---------------------------'
                                    |                             |
 seg#                               0..........xx..................

= Note =
 o GET_SEGNO_FROM_SEG0 : blk address -> global segno
 o GET_SEGNO           : blk address -> segno
 o START_BLOCK         : segno -> starting block address

Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim
2014-09-23 11:23:01 -07:00
parent 309cc2b6e7
commit 7cd8558baa
6 changed files with 81 additions and 103 deletions
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5
fs/f2fs/checkpoint.c
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@@ -98,7 +98,7 @@ static inline block_t get_max_meta_blks(struct f2fs_sb_info *sbi, int type)
case META_CP:
return 0;
case META_POR:
return SM_I(sbi)->seg0_blkaddr + TOTAL_BLKS(sbi);
return MAX_BLKADDR(sbi);
default:
BUG();
}
@@ -113,7 +113,6 @@ int ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages, int type
struct page *page;
block_t blkno = start;
block_t max_blks = get_max_meta_blks(sbi, type);
block_t min_blks = SM_I(sbi)->seg0_blkaddr;
struct f2fs_io_info fio = {
.type = META,
@@ -146,7 +145,7 @@ int ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages, int type
case META_POR:
if (unlikely(blkno >= max_blks))
goto out;
if (unlikely(blkno < min_blks))
if (unlikely(blkno < SEG0_BLKADDR(sbi)))
goto out;
blk_addr = blkno;
break;