Re: [PATCH bpf-next v2 1/6] kallsyms: Add KALLSYMS_QUERY ioctl to /proc/kallsyms

[Samuel Wu]

On Sun, Oct 25, 2026 at 4:29 PM Randy Dunlap <rdunlap@xxxxxxxxxxxxx> wrote:
>
>
>
> On 10/22/26 5:16 PM, Samuel Wu wrote:
>
> ...
> > ---
> >  include/uapi/linux/fs.h |  41 +++++++++++++
> >  kernel/kallsyms.c       | 132 ++++++++++++++++++++++++++++++++++++++++
> >  2 files changed, 173 insertions(+)
> >
> > diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h
> > index 34c6f219462a..b43f227dad0e 100644
> > --- a/include/uapi/linux/fs.h
> > +++ b/include/uapi/linux/fs.h
> > @@ -674,6 +674,47 @@ struct procmap_query {
> >       __u64 build_id_addr;            /* in */
> >  };
> >
> > +/* /proc/kallsyms ioctl */
> > +#define KALLSYMS_QUERY       _IOWR(PROCFS_IOCTL_MAGIC, 18, struct kallsyms_query)
> ...
>
>
> Documentation/userspace/ioctl/ioctl-number.rst doesn't seem to know
> about PROCFS_IOCTL_MAGIC and what range of @nr values that it uses.
>
> Please update it.
>

Thanks for the catch Randy! In v3, I'll add a 'f' 10-12 entry for
PROCFS_IOCTL_MAGIC (PAGEMAP_SCAN, PROCMAP_QUERY, KALSYMS_QUERY) to
Documentation/userspace/ioctl/ioctl-number.rst.