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SubjectRe: [PATCH] f2fs: remain written times to update inode during fsync
On 03/30, Chao Yu wrote:
> Hi Jaegeuk,
>
> On 2018/3/30 13:51, Jaegeuk Kim wrote:
> > This fixes xfstests/generic/392.
>
> Hmm... Could you please give more details about this issue and solution in
> commit message, since I can catch up the solution only with the code.

Yeah, I missed some explanation. :P

>
> Thanks,
>
> >
> > Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.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);
> > +}
> > +
> > 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;
> > }
> >
> > void update_inode_page(struct inode *inode)
> >

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