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Groups > linux.kernel > #1594603 > unrolled thread

Re: [RFC PATCH] uapi: fix linux/packet_diag.h userspace compilation error

Started byDavid Miller <davem@davemloft.net>
First post2017-03-07 21:20 +0100
Last post2017-03-08 00:50 +0100
Articles 5 — 2 participants

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  Re: [RFC PATCH] uapi: fix linux/packet_diag.h userspace  compilation error David Miller <davem@davemloft.net> - 2017-03-07 21:20 +0100
    Re: [RFC PATCH] uapi: fix linux/packet_diag.h userspace compilation error "Dmitry V. Levin" <ldv@altlinux.org> - 2017-03-07 21:40 +0100
      [PATCH] uapi: fix linux/packet_diag.h userspace compilation error "Dmitry V. Levin" <ldv@altlinux.org> - 2017-03-07 22:00 +0100
        Re: [PATCH] uapi: fix linux/packet_diag.h userspace compilation  error David Miller <davem@davemloft.net> - 2017-03-09 22:30 +0100
      Re: [RFC PATCH] uapi: fix linux/packet_diag.h userspace  compilation error David Miller <davem@davemloft.net> - 2017-03-08 00:50 +0100

#1594603 — Re: [RFC PATCH] uapi: fix linux/packet_diag.h userspace compilation error

FromDavid Miller <davem@davemloft.net>
Date2017-03-07 21:20 +0100
SubjectRe: [RFC PATCH] uapi: fix linux/packet_diag.h userspace compilation error
Message-ID<titKp-4c4-3@gated-at.bofh.it>
From: "Dmitry V. Levin" <ldv@altlinux.org>
Date: Tue, 28 Feb 2017 04:39:30 +0300

> Replace MAX_ADDR_LEN with its numeric value to fix the following
> linux/packet_diag.h userspace compilation error:
> 
> /usr/include/linux/packet_diag.h:67:17: error: 'MAX_ADDR_LEN' undeclared here (not in a function)
>   __u8 pdmc_addr[MAX_ADDR_LEN];
> 
> This is not the first case in the UAPI where the numeric value
> of MAX_ADDR_LEN is used, uapi/linux/if_link.h already does the same,
> and there are no UAPI headers besides these two that use MAX_ADDR_LEN.
> 
> The alternative fix would be to include <linux/netdevice.h> which
> pulls in other headers and a lot of definitions with them.
> 
> Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>

If if_link.h includes netdevice.h properly, let's try to do the same here as well.

Thanks.

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#1594617 — Re: [RFC PATCH] uapi: fix linux/packet_diag.h userspace compilation error

From"Dmitry V. Levin" <ldv@altlinux.org>
Date2017-03-07 21:40 +0100
SubjectRe: [RFC PATCH] uapi: fix linux/packet_diag.h userspace compilation error
Message-ID<tiu3L-4n9-5@gated-at.bofh.it>
In reply to#1594603
On Tue, Mar 07, 2017 at 12:16:49PM -0800, David Miller wrote:
> From: "Dmitry V. Levin" <ldv@altlinux.org>
> Date: Tue, 28 Feb 2017 04:39:30 +0300
> 
> > Replace MAX_ADDR_LEN with its numeric value to fix the following
> > linux/packet_diag.h userspace compilation error:
> > 
> > /usr/include/linux/packet_diag.h:67:17: error: 'MAX_ADDR_LEN' undeclared here (not in a function)
> >   __u8 pdmc_addr[MAX_ADDR_LEN];
> > 
> > This is not the first case in the UAPI where the numeric value
> > of MAX_ADDR_LEN is used, uapi/linux/if_link.h already does the same,
> > and there are no UAPI headers besides these two that use MAX_ADDR_LEN.
> > 
> > The alternative fix would be to include <linux/netdevice.h> which
> > pulls in other headers and a lot of definitions with them.
> > 
> > Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
> 
> If if_link.h includes netdevice.h properly, let's try to do the same here as well.

Sorry if my words weren't clear enough: no, if_link.h doesn't include
netdevice.h, it uses the _numeric_ value instead:

$ grep MAX_ADDR_LEN include/uapi/linux/if_link.h 
	__u8 mac[32]; /* MAX_ADDR_LEN */


-- 
ldv

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#1594637 — [PATCH] uapi: fix linux/packet_diag.h userspace compilation error

From"Dmitry V. Levin" <ldv@altlinux.org>
Date2017-03-07 22:00 +0100
Subject[PATCH] uapi: fix linux/packet_diag.h userspace compilation error
Message-ID<tiun8-4vP-9@gated-at.bofh.it>
In reply to#1594617
Replace MAX_ADDR_LEN with its numeric value to fix the following
linux/packet_diag.h userspace compilation error:

/usr/include/linux/packet_diag.h:67:17: error: 'MAX_ADDR_LEN' undeclared here (not in a function)
  __u8 pdmc_addr[MAX_ADDR_LEN];

This is not the first case in the UAPI where the numeric value
of MAX_ADDR_LEN is used instead of symbolic one, uapi/linux/if_link.h
already does the same:

$ grep MAX_ADDR_LEN include/uapi/linux/if_link.h 
	__u8 mac[32]; /* MAX_ADDR_LEN */

There are no UAPI headers besides these two that use MAX_ADDR_LEN.

Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Acked-by: Pavel Emelyanov <xemul@virtuozzo.com>
---
 include/uapi/linux/packet_diag.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/uapi/linux/packet_diag.h b/include/uapi/linux/packet_diag.h
index d08c63f..0c5d5dd 100644
--- a/include/uapi/linux/packet_diag.h
+++ b/include/uapi/linux/packet_diag.h
@@ -64,7 +64,7 @@ struct packet_diag_mclist {
 	__u32	pdmc_count;
 	__u16	pdmc_type;
 	__u16	pdmc_alen;
-	__u8	pdmc_addr[MAX_ADDR_LEN];
+	__u8	pdmc_addr[32]; /* MAX_ADDR_LEN */
 };
 
 struct packet_diag_ring {
-- 
ldv

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#1596395 — Re: [PATCH] uapi: fix linux/packet_diag.h userspace compilation error

FromDavid Miller <davem@davemloft.net>
Date2017-03-09 22:30 +0100
SubjectRe: [PATCH] uapi: fix linux/packet_diag.h userspace compilation error
Message-ID<tjdNf-2mg-13@gated-at.bofh.it>
In reply to#1594637
From: "Dmitry V. Levin" <ldv@altlinux.org>
Date: Tue, 7 Mar 2017 23:50:50 +0300

> Replace MAX_ADDR_LEN with its numeric value to fix the following
> linux/packet_diag.h userspace compilation error:
> 
> /usr/include/linux/packet_diag.h:67:17: error: 'MAX_ADDR_LEN' undeclared here (not in a function)
>   __u8 pdmc_addr[MAX_ADDR_LEN];
> 
> This is not the first case in the UAPI where the numeric value
> of MAX_ADDR_LEN is used instead of symbolic one, uapi/linux/if_link.h
> already does the same:
> 
> $ grep MAX_ADDR_LEN include/uapi/linux/if_link.h 
> 	__u8 mac[32]; /* MAX_ADDR_LEN */
> 
> There are no UAPI headers besides these two that use MAX_ADDR_LEN.
> 
> Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
> Acked-by: Pavel Emelyanov <xemul@virtuozzo.com>

Applied and queued up for -stable.

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#1594723

FromDavid Miller <davem@davemloft.net>
Date2017-03-08 00:50 +0100
Message-ID<tiun8-4vP-11@gated-at.bofh.it>
In reply to#1594617
From: "Dmitry V. Levin" <ldv@altlinux.org>
Date: Tue, 7 Mar 2017 23:28:02 +0300

> On Tue, Mar 07, 2017 at 12:16:49PM -0800, David Miller wrote:
>> From: "Dmitry V. Levin" <ldv@altlinux.org>
>> Date: Tue, 28 Feb 2017 04:39:30 +0300
>> 
>> > Replace MAX_ADDR_LEN with its numeric value to fix the following
>> > linux/packet_diag.h userspace compilation error:
>> > 
>> > /usr/include/linux/packet_diag.h:67:17: error: 'MAX_ADDR_LEN' undeclared here (not in a function)
>> >   __u8 pdmc_addr[MAX_ADDR_LEN];
>> > 
>> > This is not the first case in the UAPI where the numeric value
>> > of MAX_ADDR_LEN is used, uapi/linux/if_link.h already does the same,
>> > and there are no UAPI headers besides these two that use MAX_ADDR_LEN.
>> > 
>> > The alternative fix would be to include <linux/netdevice.h> which
>> > pulls in other headers and a lot of definitions with them.
>> > 
>> > Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
>> 
>> If if_link.h includes netdevice.h properly, let's try to do the same here as well.
> 
> Sorry if my words weren't clear enough: no, if_link.h doesn't include
> netdevice.h, it uses the _numeric_ value instead:
> 
> $ grep MAX_ADDR_LEN include/uapi/linux/if_link.h 
> 	__u8 mac[32]; /* MAX_ADDR_LEN */

Ok then we might as well do the same thing here, please resubmit this
patch formally.

Thanks.

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