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devlink: add split ops generated according to spec

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Improve the existing devlink spec in order to serve as a source for
generation of valid devlink split ops for the existing commands.
Add the generated sources.

Node that the policies are narrowed down only to the attributes that
are actually parsed. The dont-validate-strict parsing policy makes sure
that other possibly passed garbage attributes from userspace are
ignored during validation.

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Link: https://lore.kernel.org/r/20230803111340.1074067-11-jiri@resnulli.us
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jiri Pirko 2023-08-03 13:13:38 +02:00 committed by Jakub Kicinski
parent 759f661012
commit 6b7c486cae
4 changed files with 99 additions and 1 deletions
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10
Documentation/netlink/specs/devlink.yaml
View file

@ -165,8 +165,13 @@ operations:
name: get
doc: Get devlink instances.
attribute-set: devlink
dont-validate:
- strict
- dump
do:
pre: devlink-nl-pre-doit
post: devlink-nl-post-doit
request:
value: 1
attributes: &dev-id-attrs
@ -189,8 +194,13 @@ operations:
name: info-get
doc: Get device information, like driver name, hardware and firmware versions etc.
attribute-set: devlink
dont-validate:
- strict
- dump
do:
pre: devlink-nl-pre-doit
post: devlink-nl-post-doit
request:
value: 51
attributes: *dev-id-attrs

2
net/devlink/Makefile
View file

@ -1,3 +1,3 @@
# SPDX-License-Identifier: GPL-2.0
obj-y := leftover.o core.o netlink.o dev.o health.o
obj-y := leftover.o core.o netlink.o netlink_gen.o dev.o health.o

59
net/devlink/netlink_gen.c Normal file
View file

@ -0,0 +1,59 @@
// SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)
/* Do not edit directly, auto-generated from: */
/* Documentation/netlink/specs/devlink.yaml */
/* YNL-GEN kernel source */
#include <net/netlink.h>
#include <net/genetlink.h>
#include "netlink_gen.h"
#include <uapi/linux/devlink.h>
/* DEVLINK_CMD_GET - do */
static const struct nla_policy devlink_get_nl_policy[DEVLINK_ATTR_DEV_NAME + 1] = {
[DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING, },
[DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING, },
};
/* DEVLINK_CMD_INFO_GET - do */
static const struct nla_policy devlink_info_get_nl_policy[DEVLINK_ATTR_DEV_NAME + 1] = {
[DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING, },
[DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING, },
};
/* Ops table for devlink */
const struct genl_split_ops devlink_nl_ops[4] = {
{
.cmd = DEVLINK_CMD_GET,
.validate = GENL_DONT_VALIDATE_STRICT,
.pre_doit = devlink_nl_pre_doit,
.doit = devlink_nl_get_doit,
.post_doit = devlink_nl_post_doit,
.policy = devlink_get_nl_policy,
.maxattr = DEVLINK_ATTR_DEV_NAME,
.flags = GENL_CMD_CAP_DO,
},
{
.cmd = DEVLINK_CMD_GET,
.validate = GENL_DONT_VALIDATE_DUMP,
.dumpit = devlink_nl_get_dumpit,
.flags = GENL_CMD_CAP_DUMP,
},
{
.cmd = DEVLINK_CMD_INFO_GET,
.validate = GENL_DONT_VALIDATE_STRICT,
.pre_doit = devlink_nl_pre_doit,
.doit = devlink_nl_info_get_doit,
.post_doit = devlink_nl_post_doit,
.policy = devlink_info_get_nl_policy,
.maxattr = DEVLINK_ATTR_DEV_NAME,
.flags = GENL_CMD_CAP_DO,
},
{
.cmd = DEVLINK_CMD_INFO_GET,
.validate = GENL_DONT_VALIDATE_DUMP,
.dumpit = devlink_nl_info_get_dumpit,
.flags = GENL_CMD_CAP_DUMP,
},
};

29
net/devlink/netlink_gen.h Normal file
View file

@ -0,0 +1,29 @@
/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */
/* Do not edit directly, auto-generated from: */
/* Documentation/netlink/specs/devlink.yaml */
/* YNL-GEN kernel header */
#ifndef _LINUX_DEVLINK_GEN_H
#define _LINUX_DEVLINK_GEN_H
#include <net/netlink.h>
#include <net/genetlink.h>
#include <uapi/linux/devlink.h>
/* Ops table for devlink */
extern const struct genl_split_ops devlink_nl_ops[4];
int devlink_nl_pre_doit(const struct genl_split_ops *ops, struct sk_buff *skb,
struct genl_info *info);
void
devlink_nl_post_doit(const struct genl_split_ops *ops, struct sk_buff *skb,
struct genl_info *info);
int devlink_nl_get_doit(struct sk_buff *skb, struct genl_info *info);
int devlink_nl_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb);
int devlink_nl_info_get_doit(struct sk_buff *skb, struct genl_info *info);
int devlink_nl_info_get_dumpit(struct sk_buff *skb,
struct netlink_callback *cb);
#endif /* _LINUX_DEVLINK_GEN_H */