On Fri, Jun 24, 2022 at 07:09:17PM +0200, Jason A. Donenfeld wrote: > Hi Al, > > On Fri, Jun 24, 2022 at 06:04:19PM +0100, Al Viro wrote: > > On Fri, Jun 24, 2022 at 06:56:28PM +0200, Jason A. Donenfeld wrote: > > > This helps unify a longstanding wart where FMODE_LSEEK hasn't been > > > uniformly unset when it should be. > > > > > > Signed-off-by: Jason A. Donenfeld <Jason@xxxxxxxxx> > > > --- > > > fs/file_table.c | 2 ++ > > > fs/open.c | 2 ++ > > > 2 files changed, 4 insertions(+) > > > > > > diff --git a/fs/file_table.c b/fs/file_table.c > > > index 5424e3a8df5f..15700b2e1b53 100644 > > > --- a/fs/file_table.c > > > +++ b/fs/file_table.c > > > @@ -241,6 +241,8 @@ static struct file *alloc_file(const struct path *path, int flags, > > > if ((file->f_mode & FMODE_WRITE) && > > > likely(fop->write || fop->write_iter)) > > > file->f_mode |= FMODE_CAN_WRITE; > > > + if ((file->f_mode & FMODE_LSEEK) && !file->f_op->llseek) > > > + file->f_mode &= ~FMODE_LSEEK; > > > > Where would FMODE_LSEEK come from in this one? ->f_mode is set > > (in __alloc_file()) to OPEN_FMODE(flags); that does deal with FMODE_READ > > and FMODE_WRITE, but FMODE_LSEEK will be clear... > > >From the `int flags` parameter of the function. That's an O flag not an > F flag, though, so I assume you mean that it's impossible to get LSEEK > there in practice? If so, I'll drop this hunk. if (file->f_op->llseek) file->f_mode |= FMODE_LSEEK; you want it to match what came in file_operations...
