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devlink: generate the port function policy from the spec

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devlink has a one huge root attribute set for the whole family,
we haven't taken the time to properly define the sub-sets for
each command. Do it for port-set so that we can drop the hand
written policy used by devlink_port_function_set().

We need this subsetting because within the DEVLINK_ATTR_PORT_FUNCTION
nest DEVLINK_PORT_FN_ATTR_OPSTATE and DEVLINK_PORT_FN_ATTR_DEVLINK
are output-only so we have to filter them out of the input set.

Link: https://patch.msgid.link/20260915161341.1053476-6-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski 2026-09-15 09:13:37 -07:00
parent 4ced66fc97
commit 3ec610a6bb
4 changed files with 42 additions and 30 deletions
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37
Documentation/netlink/specs/devlink.yaml
View File

@ -1001,6 +1001,41 @@ attribute-sets:
name: max-io-eqs
type: u32
-
name: dl-port-function-set
subset-of: dl-port-function
doc: |
Port function attributes that can be configured; opstate and the
devlink handle are read-only.
attributes:
-
name: hw-addr
-
name: state
-
name: caps
-
name: max-io-eqs
-
name: dl-port-set
subset-of: devlink
doc: Attributes accepted by the port-set request.
attributes:
-
name: bus-name
-
name: dev-name
-
name: index
-
name: port-index
-
name: port-type
-
name: port-function
nested-attributes: dl-port-function-set
-
name: dl-dpipe-tables
subset-of: devlink
@ -1429,7 +1464,7 @@ operations:
-
name: port-set
doc: Set devlink port instances.
attribute-set: devlink
attribute-set: dl-port-set
dont-validate: [strict]
flags: [admin-perm]
do:

13
net/devlink/netlink_gen.c
View File

@ -46,25 +46,16 @@ devlink_attr_param_type_validate(const struct nlattr *attr,
}
/* Common nested types */
const struct nla_policy devlink_dl_nested_devlink_nl_policy[DEVLINK_ATTR_INDEX + 1] = {
[DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING, },
[DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING, },
[DEVLINK_ATTR_INDEX] = NLA_POLICY_FULL_RANGE(NLA_UINT, &devlink_attr_index_range),
[DEVLINK_ATTR_NETNS_ID] = { .type = NLA_U32, },
};
const struct nla_policy devlink_dl_parent_dev_nl_policy[DEVLINK_ATTR_INDEX + 1] = {
[DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING, },
[DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING, },
[DEVLINK_ATTR_INDEX] = NLA_POLICY_FULL_RANGE(NLA_UINT, &devlink_attr_index_range),
};
const struct nla_policy devlink_dl_port_function_nl_policy[DEVLINK_PORT_FN_ATTR_MAX_IO_EQS + 1] = {
const struct nla_policy devlink_dl_port_function_set_nl_policy[DEVLINK_PORT_FN_ATTR_MAX_IO_EQS + 1] = {
[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR] = { .type = NLA_BINARY, },
[DEVLINK_PORT_FN_ATTR_STATE] = NLA_POLICY_MAX(NLA_U8, 1),
[DEVLINK_PORT_FN_ATTR_OPSTATE] = NLA_POLICY_MAX(NLA_U8, 1),
[DEVLINK_PORT_FN_ATTR_CAPS] = NLA_POLICY_BITFIELD32(15),
[DEVLINK_PORT_FN_ATTR_DEVLINK] = NLA_POLICY_NESTED(devlink_dl_nested_devlink_nl_policy),
[DEVLINK_PORT_FN_ATTR_MAX_IO_EQS] = { .type = NLA_U32, },
};
@ -106,7 +97,7 @@ static const struct nla_policy devlink_port_set_nl_policy[DEVLINK_ATTR_INDEX + 1
[DEVLINK_ATTR_INDEX] = NLA_POLICY_FULL_RANGE(NLA_UINT, &devlink_attr_index_range),
[DEVLINK_ATTR_PORT_INDEX] = { .type = NLA_U32, },
[DEVLINK_ATTR_PORT_TYPE] = NLA_POLICY_MAX(NLA_U16, 3),
[DEVLINK_ATTR_PORT_FUNCTION] = NLA_POLICY_NESTED(devlink_dl_port_function_nl_policy),
[DEVLINK_ATTR_PORT_FUNCTION] = NLA_POLICY_NESTED(devlink_dl_port_function_set_nl_policy),
};
/* DEVLINK_CMD_PORT_NEW - do */

3
net/devlink/netlink_gen.h
View File

@ -13,9 +13,8 @@
#include <uapi/linux/devlink.h>
/* Common nested types */
extern const struct nla_policy devlink_dl_nested_devlink_nl_policy[DEVLINK_ATTR_INDEX + 1];
extern const struct nla_policy devlink_dl_parent_dev_nl_policy[DEVLINK_ATTR_INDEX + 1];
extern const struct nla_policy devlink_dl_port_function_nl_policy[DEVLINK_PORT_FN_ATTR_MAX_IO_EQS + 1];
extern const struct nla_policy devlink_dl_port_function_set_nl_policy[DEVLINK_PORT_FN_ATTR_MAX_IO_EQS + 1];
extern const struct nla_policy devlink_dl_rate_tc_bws_nl_policy[DEVLINK_RATE_TC_ATTR_BW + 1];
extern const struct nla_policy devlink_dl_selftest_id_nl_policy[DEVLINK_ATTR_SELFTEST_ID_FLASH + 1];

19
net/devlink/port.c
View File

@ -6,19 +6,6 @@
#include "devl_internal.h"
#define DEVLINK_PORT_FN_CAPS_VALID_MASK \
(_BITUL(__DEVLINK_PORT_FN_ATTR_CAPS_MAX) - 1)
static const struct nla_policy devlink_function_nl_policy[DEVLINK_PORT_FUNCTION_ATTR_MAX + 1] = {
[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR] = { .type = NLA_BINARY },
[DEVLINK_PORT_FN_ATTR_STATE] =
NLA_POLICY_RANGE(NLA_U8, DEVLINK_PORT_FN_STATE_INACTIVE,
DEVLINK_PORT_FN_STATE_ACTIVE),
[DEVLINK_PORT_FN_ATTR_CAPS] =
NLA_POLICY_BITFIELD32(DEVLINK_PORT_FN_CAPS_VALID_MASK),
[DEVLINK_PORT_FN_ATTR_MAX_IO_EQS] = { .type = NLA_U32 },
};
#define ASSERT_DEVLINK_PORT_REGISTERED(devlink_port) \
WARN_ON_ONCE(!(devlink_port)->registered)
#define ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port) \
@ -782,11 +769,11 @@ static int devlink_port_function_set(struct devlink_port *port,
const struct nlattr *attr,
struct netlink_ext_ack *extack)
{
struct nlattr *tb[DEVLINK_PORT_FUNCTION_ATTR_MAX + 1];
struct nlattr *tb[ARRAY_SIZE(devlink_dl_port_function_set_nl_policy)];
int err;
err = nla_parse_nested(tb, DEVLINK_PORT_FUNCTION_ATTR_MAX, attr,
devlink_function_nl_policy, extack);
err = nla_parse_nested(tb, ARRAY_SIZE(tb) - 1, attr,
devlink_dl_port_function_set_nl_policy, extack);
if (err < 0) {
NL_SET_ERR_MSG(extack, "Fail to parse port function attributes");
return err;