From 96cf51acccb64d24339822824c262a1d3744d218 Mon Sep 17 00:00:00 2001 From: Yuezhang Mo Date: Wed, 9 Nov 2022 18:30:33 +0800 Subject: exfat: do not sync parent dir if just update timestamp 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 Reviewed-by: Andy Wu Reviewed-by: Aoyama Wataru Reviewed-by: Sungjong Seo Signed-off-by: Namjae Jeon --- fs/exfat/namei.c | 19 ++++++++----------- 1 file changed, 8 insertions(+), 11 deletions(-) diff --git a/fs/exfat/namei.c b/fs/exfat/namei.c index 79e3fc9d6e19..b33497845a06 100644 --- a/fs/exfat/namei.c +++ b/fs/exfat/namei.c @@ -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); -- cgit v1.2.3