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Message-ID: <20180403052310.GB57227@jaegeuk-macbookpro.roam.corp.google.com> Date: Mon, 2 Apr 2018 22:23:10 -0700 From: Jaegeuk Kim <jaegeuk@...nel.org> To: Chao Yu <yuchao0@...wei.com> Cc: linux-kernel@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net Subject: Re: [PATCH v2] f2fs: remain written times to update inode during fsync On 04/03, Chao Yu wrote: > On 2018/3/31 0:30, Jaegeuk Kim wrote: > > Change log from v1: > > - add more description > > > > This fixes xfstests/generic/392. > > > > The failure was caused by different times between 1) one marked in the last > > fsync(2) call and 2) the other given by roll-forward recovery after power-cut. > > The reason was that we skipped updating inode block at 1), since its i_size > > was recoverable along with 4KB-aligned data writes, which was fixed by: > > "f2fs: fix a wrong condition in f2fs_skip_inode_update" > > > > Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org> > > --- > > fs/f2fs/f2fs.h | 15 +++++++++++++++ > > fs/f2fs/inode.c | 4 ++++ > > 2 files changed, 19 insertions(+) > > > > diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h > > index 000f93f6767e..675c39d85111 100644 > > --- a/fs/f2fs/f2fs.h > > +++ b/fs/f2fs/f2fs.h > > @@ -664,6 +664,7 @@ struct f2fs_inode_info { > > kprojid_t i_projid; /* id for project quota */ > > int i_inline_xattr_size; /* inline xattr size */ > > struct timespec i_crtime; /* inode creation time */ > > + struct timespec i_disk_time[4]; /* inode disk times */ > > }; > > > > static inline void get_extent_info(struct extent_info *ext, > > @@ -2457,6 +2458,11 @@ static inline void clear_file(struct inode *inode, int type) > > f2fs_mark_inode_dirty_sync(inode, true); > > } > > > > +static inline bool time_equal(struct timespec a, struct timespec b) > > +{ > > + return (a.tv_sec == b.tv_sec) && (a.tv_nsec == b.tv_nsec); > > +} > > We can use existing timespec_equal in <linux/time.h> instead of defining a > duplicated one? It is defined with const parameters. > > > + > > static inline bool f2fs_skip_inode_update(struct inode *inode, int dsync) > > { > > bool ret; > > @@ -2474,6 +2480,15 @@ static inline bool f2fs_skip_inode_update(struct inode *inode, int dsync) > > i_size_read(inode) & ~PAGE_MASK) > > return false; > > > > + if (!time_equal(F2FS_I(inode)->i_disk_time[0], inode->i_atime)) > > + return false; > > + if (!time_equal(F2FS_I(inode)->i_disk_time[1], inode->i_ctime)) > > + return false; > > + if (!time_equal(F2FS_I(inode)->i_disk_time[2], inode->i_mtime)) > > + return false; > > + if (!time_equal(F2FS_I(inode)->i_disk_time[3], F2FS_I(inode)->i_crtime)) > > + return false; > > + > > down_read(&F2FS_I(inode)->i_sem); > > ret = F2FS_I(inode)->last_disk_size == i_size_read(inode); > > up_read(&F2FS_I(inode)->i_sem); > > diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c > > index 401f09ccce7e..70aba580f4b0 100644 > > --- a/fs/f2fs/inode.c > > +++ b/fs/f2fs/inode.c > > @@ -444,6 +444,10 @@ void update_inode(struct inode *inode, struct page *node_page) > > if (inode->i_nlink == 0) > > clear_inline_node(node_page); > > > > + F2FS_I(inode)->i_disk_time[0] = inode->i_atime; > > + F2FS_I(inode)->i_disk_time[1] = inode->i_ctime; > > + F2FS_I(inode)->i_disk_time[2] = inode->i_mtime; > > + F2FS_I(inode)->i_disk_time[3] = F2FS_I(inode)->i_crtime; > > We need initialize them in do_read_inode? Done. Thanks, > > Thanks, > > > } > > > > void update_inode_page(struct inode *inode) > >
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