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exfat: do not sync parent dir if just update timestamp

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When sync or dir_sync is enabled, there is no need to sync the
parent directory's inode if only for updating its timestamp.

1. If an unexpected power failure occurs, the timestamp of the
   parent directory is not updated to the storage, which has no
   impact on the user.

2. The number of writes will be greatly reduced, which can not
   only improve performance, but also prolong device life.

Signed-off-by: Yuezhang Mo <Yuezhang.Mo@sony.com>
Reviewed-by: Andy Wu <Andy.Wu@sony.com>
Reviewed-by: Aoyama Wataru <wataru.aoyama@sony.com>
Reviewed-by: Sungjong Seo <sj1557.seo@samsung.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
This commit is contained in:
Yuezhang Mo 2022-11-09 18:30:33 +08:00 committed by Namjae Jeon
parent 4d71455976
commit 96cf51accc
1 changed files with 8 additions and 11 deletions
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19
fs/exfat/namei.c
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@ -547,6 +547,7 @@ static int exfat_create(struct mnt_idmap *idmap, struct inode *dir,
struct exfat_dir_entry info;
loff_t i_pos;
int err;
loff_t size = i_size_read(dir);
mutex_lock(&EXFAT_SB(sb)->s_lock);
exfat_set_volume_dirty(sb);
@ -557,7 +558,7 @@ static int exfat_create(struct mnt_idmap *idmap, struct inode *dir,
inode_inc_iversion(dir);
inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir));
if (IS_DIRSYNC(dir))
if (IS_DIRSYNC(dir) && size != i_size_read(dir))
exfat_sync_inode(dir);
else
mark_inode_dirty(dir);
@ -801,10 +802,7 @@ static int exfat_unlink(struct inode *dir, struct dentry *dentry)
inode_inc_iversion(dir);
simple_inode_init_ts(dir);
exfat_truncate_inode_atime(dir);
if (IS_DIRSYNC(dir))
exfat_sync_inode(dir);
else
mark_inode_dirty(dir);
mark_inode_dirty(dir);
clear_nlink(inode);
simple_inode_init_ts(inode);
@ -825,6 +823,7 @@ static int exfat_mkdir(struct mnt_idmap *idmap, struct inode *dir,
struct exfat_chain cdir;
loff_t i_pos;
int err;
loff_t size = i_size_read(dir);
mutex_lock(&EXFAT_SB(sb)->s_lock);
exfat_set_volume_dirty(sb);
@ -835,7 +834,7 @@ static int exfat_mkdir(struct mnt_idmap *idmap, struct inode *dir,
inode_inc_iversion(dir);
inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir));
if (IS_DIRSYNC(dir))
if (IS_DIRSYNC(dir) && size != i_size_read(dir))
exfat_sync_inode(dir);
else
mark_inode_dirty(dir);
@ -1239,6 +1238,7 @@ static int exfat_rename(struct mnt_idmap *idmap,
struct super_block *sb = old_dir->i_sb;
loff_t i_pos;
int err;
loff_t size = i_size_read(new_dir);
/*
* The VFS already checks for existence, so for local filesystems
@ -1260,7 +1260,7 @@ static int exfat_rename(struct mnt_idmap *idmap,
simple_rename_timestamp(old_dir, old_dentry, new_dir, new_dentry);
EXFAT_I(new_dir)->i_crtime = current_time(new_dir);
exfat_truncate_inode_atime(new_dir);
if (IS_DIRSYNC(new_dir))
if (IS_DIRSYNC(new_dir) && size != i_size_read(new_dir))
exfat_sync_inode(new_dir);
else
mark_inode_dirty(new_dir);
@ -1281,10 +1281,7 @@ static int exfat_rename(struct mnt_idmap *idmap,
}
inode_inc_iversion(old_dir);
if (IS_DIRSYNC(old_dir))
exfat_sync_inode(old_dir);
else
mark_inode_dirty(old_dir);
mark_inode_dirty(old_dir);
if (new_inode) {
exfat_unhash_inode(new_inode);