On Tue, Feb 25, 2020 at 3:46 PM Jan Kara <jack@xxxxxxx> wrote:
>
> On Mon 17-02-20 15:14:41, Amir Goldstein wrote:
> > Most of the code in fsnotify hooks is boiler plate of one or the other.
> >
> > Signed-off-by: Amir Goldstein <amir73il@xxxxxxxxx>
> > ---
> > include/linux/fsnotify.h | 96 +++++++++++++++-------------------------
> > 1 file changed, 36 insertions(+), 60 deletions(-)
>
> Nice cleanup. Just two comments below.
>
> > @@ -58,8 +78,6 @@ static inline int fsnotify_path(struct inode *inode, const struct path *path,
> > static inline int fsnotify_perm(struct file *file, int mask)
> > {
> > int ret;
> > - const struct path *path = &file->f_path;
> > - struct inode *inode = file_inode(file);
> > __u32 fsnotify_mask = 0;
> >
> > if (file->f_mode & FMODE_NONOTIFY)
>
> I guess you can drop the NONOTIFY check from here. You've moved it to
> fsnotify_file() and there's not much done in this function to be worth
> skipping...
True.
>
> > @@ -70,7 +88,7 @@ static inline int fsnotify_perm(struct file *file, int mask)
> > fsnotify_mask = FS_OPEN_PERM;
> >
> > if (file->f_flags & __FMODE_EXEC) {
> > - ret = fsnotify_path(inode, path, FS_OPEN_EXEC_PERM);
> > + ret = fsnotify_file(file, FS_OPEN_EXEC_PERM);
> >
> > if (ret)
> > return ret;
>
> Hum, I think we could simplify fsnotify_perm() even further by having:
>
> if (mask & MAY_OPEN) {
> if (file->f_flags & __FMODE_EXEC)
> fsnotify_mask = FS_OPEN_EXEC_PERM;
> else
> fsnotify_mask = FS_OPEN_PERM;
> } ...
>
But the current code sends both FS_OPEN_EXEC_PERM and FS_OPEN_PERM
on an open for exec. I believe that is what was discussed when Matthew wrote
the OPEN_EXEC patches, so existing receivers of OPEN_PERM event on exec
will not regress..
Thanks,
Amir.
