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nilfs2: clean up nilfs_write_super 

Separate conditions that check if syncing super block and alternative
super block are required as inline functions to reuse the conditions.

Signed-off-by: Jiro SEKIBA <jir@unicus.jp>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
This commit is contained in:
Jiro SEKIBA 2009-07-23 01:26:34 +09:00 committed by Ryusuke Konishi
parent 6233caa9d5
commit 79efdd9411
2 changed files with 17 additions and 8 deletions
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11
fs/nilfs2/super.c
View File

@ -367,17 +367,12 @@ static void nilfs_write_super(struct super_block *sb)
down_write(&nilfs->ns_sem);
if (!(sb->s_flags & MS_RDONLY)) {
struct nilfs_super_block **sbp = nilfs->ns_sbp;
u64 t = get_seconds();
int dupsb;
if (!nilfs_discontinued(nilfs) && t >= nilfs->ns_sbwtime[0] &&
t < nilfs->ns_sbwtime[0] + NILFS_SB_FREQ) {
if (!nilfs_discontinued(nilfs) &&
!nilfs_sb_need_update(nilfs)) {
up_write(&nilfs->ns_sem);
return;
}
dupsb = sbp[1] && t > nilfs->ns_sbwtime[1] + NILFS_ALTSB_FREQ;
nilfs_commit_super(sbi, dupsb);
nilfs_commit_super(sbi, nilfs_altsb_need_update(nilfs));
}
sb->s_dirt = 0;
up_write(&nilfs->ns_sem);

14
fs/nilfs2/the_nilfs.h
View File

@ -200,6 +200,20 @@ THE_NILFS_FNS(DISCONTINUED, discontinued)
#define NILFS_SB_FREQ 10
#define NILFS_ALTSB_FREQ 60 /* spare superblock */
static inline int nilfs_sb_need_update(struct the_nilfs *nilfs)
{
u64 t = get_seconds();
return t < nilfs->ns_sbwtime[0] ||
t > nilfs->ns_sbwtime[0] + NILFS_SB_FREQ;
}
static inline int nilfs_altsb_need_update(struct the_nilfs *nilfs)
{
u64 t = get_seconds();
struct nilfs_super_block **sbp = nilfs->ns_sbp;
return sbp[1] && t > nilfs->ns_sbwtime[1] + NILFS_ALTSB_FREQ;
}
void nilfs_set_last_segment(struct the_nilfs *, sector_t, u64, __u64);
struct the_nilfs *find_or_create_nilfs(struct block_device *);
void put_nilfs(struct the_nilfs *);