[PATCH] staging: erofs: using switch-case while checking the inode type.

[Pratik Shinde]

Hi Gao,

Sorry I didn't pull the latest tree. I will do the necessary.
Anyways, don't you think it will be cleaner to have a switch case statement
rather than if-else statement.

--Pratik



On Thu, 29 Aug, 2019, 7:27 PM Gao Xiang, <gaoxiang25 at huawei.com> wrote:

> Hi Pratik,
>
> On Thu, Aug 29, 2019 at 06:38:13PM +0530, Pratik Shinde wrote:
> > while filling the linux inode, using switch-case statement to check
> > the type of inode.
> > switch-case statement looks more clean.
> >
> > Signed-off-by: Pratik Shinde <pratikshinde320 at gmail.com>
>
> No, that is not the case, see __ext4_iget() in fs/ext4/inode.c.
> and could you write patches based on latest staging tree?
> erofs is now in "fs/" rather than "drivers/staging".
> and I will review it then.
>
> p.s. if someone argues here or there, there will be endless
> issues since there is no standard at all.
>
> Thanks,
> Gao Xiang
>
> > ---
> >  drivers/staging/erofs/inode.c | 18 ++++++++++++------
> >  1 file changed, 12 insertions(+), 6 deletions(-)
> >
> > diff --git a/drivers/staging/erofs/inode.c
> b/drivers/staging/erofs/inode.c
> > index 4c3d8bf..2d2d545 100644
> > --- a/drivers/staging/erofs/inode.c
> > +++ b/drivers/staging/erofs/inode.c
> > @@ -190,22 +190,28 @@ static int fill_inode(struct inode *inode, int
> isdir)
> >       err = read_inode(inode, data + ofs);
> >       if (!err) {
> >               /* setup the new inode */
> > -             if (S_ISREG(inode->i_mode)) {
> > +             switch (inode->i_mode & S_IFMT) {
> > +             case S_IFREG:
> >                       inode->i_op = &erofs_generic_iops;
> >                       inode->i_fop = &generic_ro_fops;
> > -             } else if (S_ISDIR(inode->i_mode)) {
> > +                     break;
> > +             case S_IFDIR:
> >                       inode->i_op = &erofs_dir_iops;
> >                       inode->i_fop = &erofs_dir_fops;
> > -             } else if (S_ISLNK(inode->i_mode)) {
> > +                     break;
> > +             case S_IFLNK:
> >                       /* by default, page_get_link is used for symlink */
> >                       inode->i_op = &erofs_symlink_iops;
> >                       inode_nohighmem(inode);
> > -             } else if (S_ISCHR(inode->i_mode) ||
> S_ISBLK(inode->i_mode) ||
> > -                     S_ISFIFO(inode->i_mode) ||
> S_ISSOCK(inode->i_mode)) {
> > +                     break;
> > +             case S_IFCHR:
> > +             case S_IFBLK:
> > +             case S_IFIFO:
> > +             case S_IFSOCK:
> >                       inode->i_op = &erofs_generic_iops;
> >                       init_special_inode(inode, inode->i_mode,
> inode->i_rdev);
> >                       goto out_unlock;
> > -             } else {
> > +             default:
> >                       err = -EIO;
> >                       goto out_unlock;
> >               }
> > --
> > 2.9.3
> >
>
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