Sun, Jun 11, 2017 at 08:37:25PM CEST, jhs@mojatatu.com wrote:

On 17-06-11 01:38 PM, Jamal Hadi Salim wrote:

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On 17-06-11 09:49 AM, Jiri Pirko wrote:

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Sun, Jun 11, 2017 at 01:53:43PM CEST, jhs@mojatatu.com wrote:

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From: Jamal Hadi Salim <jhs@mojatatu.com>

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This patch also provides an extra feature: a validation callback
that could be speaciliazed for other types.

s/speaciliazed/speciliazed/

Will fix.

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[ATTR_GOO] = { .type = MYTYPE,
           .validation_data = &myvalidation_data,
               .validate_content = mycontent_validator },

Indent is wrong. (Does not matter really in desc, but anyway)

I cant find out how it got indented that way; my source
or email dont show it as such (but really doesnt matter).

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Suggested-by: Jiri Pirko <redacted>

Will add.

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---
include/net/netlink.h          | 11 +++++++++++
include/uapi/linux/rtnetlink.h | 17 +++++++++++++++++
lib/nlattr.c                   | 25 +++++++++++++++++++++++++
3 files changed, 53 insertions(+)

diff --git a/include/net/netlink.h b/include/net/netlink.h
index 0170917..8ab9784 100644
--- a/include/net/netlink.h
+++ b/include/net/netlink.h

@@ -6,6 +6,11 @@

#include <linux/jiffies.h>
#include <linux/in6.h>

+struct nla_bit_flags {
+    u32 nla_flag_values;
+    u32 nla_flag_selector;
+};

I don't understand why you redefine the struct here. You already have it
defined in the uapi: struct __nla_bit_flags

Just move this (struct nla_bit_flags) to the uapi and remove
__nla_bit_flags ?

I am not sure that will compile since the type is defined in netlink.h
Also, note: uapi uses _u32 and kernel uses u32 as types i.e it is pretty
common approach; i will try to move it to uapi and keep that uapi
format. If it doesnt compile without acrobatics I will keep it as is.

It doesnt compile - I could move it to linux/netlink.h but it seems
so out of place.
so i will keep things as is for now unless you can think of something
else.

First of all, makes no sense to put this struct "struct __nla_bit_flags"
into rtnetlink.h uapi file. This is generic netlink stuff, not specifict
to rtnetlink.

I believe that this struct should go into:
include/uapi/linux/netlink.h

struct nla_flag_bits {
	__u32 nla_flag_bits_values;
	__u32 nla_flag_bits_selector;
};

Then you can use it from userspace and everywhere in kernel.

Btw, I find it very odd that enum containling NLA_* like NLA_U32 and
others is not part of uapi file and is rather defined in
include/net/netlink.h. Any idea why?