Re: [PATCH v2] nfs: use vfs setgid helper

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On Tue, Mar 14, 2023 at 12:37:03PM +0000, Matthew Wilcox wrote:
> On Tue, Mar 14, 2023 at 12:51:10PM +0100, Christian Brauner wrote:
> > +++ b/include/linux/fs.h
> > @@ -2675,6 +2675,8 @@ extern struct inode *new_inode(struct super_block *sb);
> >  extern void free_inode_nonrcu(struct inode *inode);
> >  extern int setattr_should_drop_suidgid(struct mnt_idmap *, struct inode *);
> >  extern int file_remove_privs(struct file *);
> > +int setattr_should_drop_sgid(struct mnt_idmap *idmap,
> > +			     const struct inode *inode);
> 
> Is there a reason that setattr_should_drop_sgid() doesn't take a
> const struct mnt_idmap pointer?

Yeah, unfortunately a bunch of helpers that we're passing it down to
from setattr_should_drop_sgid() currently take a non-const pointer to
mnt_idmap. I have a ToDo that to go through all helpers and make them
const wherever we can.



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