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f2fs: introduce is_valid_blkaddr to cleanup codes in ra_meta_pages 

This patch does cleanup work, it introduces is_valid_blkaddr() to include
verification code for blkaddr with upper and down boundary value which were in
ra_meta_pages previous.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2014-12-08 14:59:17 +08:00 committed by Jaegeuk Kim
parent 13da549460
commit 66b00c1867
1 changed files with 26 additions and 27 deletions
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53
fs/f2fs/checkpoint.c
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@ -87,22 +87,36 @@ struct page *get_meta_page_ra(struct f2fs_sb_info *sbi, pgoff_t index)
return get_meta_page(sbi, index);
}
static inline block_t get_max_meta_blks(struct f2fs_sb_info *sbi, int type)
static inline bool is_valid_blkaddr(struct f2fs_sb_info *sbi,
block_t blkaddr, int type)
{
switch (type) {
case META_NAT:
return NM_I(sbi)->max_nid / NAT_ENTRY_PER_BLOCK;
break;
case META_SIT:
return SIT_BLK_CNT(sbi);
if (unlikely(blkaddr >= SIT_BLK_CNT(sbi)))
return false;
break;
case META_SSA:
return MAIN_BLKADDR(sbi);
if (unlikely(blkaddr >= MAIN_BLKADDR(sbi) ||
blkaddr < SM_I(sbi)->ssa_blkaddr))
return false;
break;
case META_CP:
return SM_I(sbi)->sit_info->sit_base_addr;
if (unlikely(blkaddr >= SIT_I(sbi)->sit_base_addr ||
blkaddr < __start_cp_addr(sbi)))
return false;
break;
case META_POR:
return MAX_BLKADDR(sbi);
if (unlikely(blkaddr >= MAX_BLKADDR(sbi) ||
blkaddr < MAIN_BLKADDR(sbi)))
return false;
break;
default:
BUG();
}
return true;
}
/*
@ -113,7 +127,6 @@ int ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages, int type
block_t prev_blk_addr = 0;
struct page *page;
block_t blkno = start;
block_t max_blks = get_max_meta_blks(sbi, type);
struct f2fs_io_info fio = {
.type = META,
@ -123,18 +136,20 @@ int ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages, int type
for (; nrpages-- > 0; blkno++) {
block_t blk_addr;
if (!is_valid_blkaddr(sbi, blkno, type))
goto out;
switch (type) {
case META_NAT:
/* get nat block addr */
if (unlikely(blkno >= max_blks))
if (unlikely(blkno >=
NAT_BLOCK_OFFSET(NM_I(sbi)->max_nid)))
blkno = 0;
/* get nat block addr */
blk_addr = current_nat_addr(sbi,
blkno * NAT_ENTRY_PER_BLOCK);
break;
case META_SIT:
/* get sit block addr */
if (unlikely(blkno >= max_blks))
goto out;
blk_addr = current_sit_addr(sbi,
blkno * SIT_ENTRY_PER_BLOCK);
if (blkno != start && prev_blk_addr + 1 != blk_addr)
@ -142,24 +157,8 @@ int ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages, int type
prev_blk_addr = blk_addr;
break;
case META_SSA:
if (unlikely(blkno >= max_blks))
goto out;
if (unlikely(blkno < SM_I(sbi)->ssa_blkaddr))
goto out;
blk_addr = blkno;
break;
case META_CP:
if (unlikely(blkno >= max_blks))
goto out;
if (unlikely(blkno < __start_cp_addr(sbi)))
goto out;
blk_addr = blkno;
break;
case META_POR:
if (unlikely(blkno >= max_blks))
goto out;
if (unlikely(blkno < MAIN_BLKADDR(sbi)))
goto out;
blk_addr = blkno;
break;
default: