Add support for permanent config parameter get/set commands. Used
for persistent device configuration parameters.
Signed-off-by: Steve Lin <steven.l...@broadcom.com>
Acked-by: Andy Gospodarek <go...@broadcom.com>
---
include/net/devlink.h | 6 +
include/uapi/linux/devlink.h | 18 +++
net/core/devlink.c | 295 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 319 insertions(+)
diff --git a/include/net/devlink.h b/include/net/devlink.h
index b9654e1..eb86031 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -270,6 +270,12 @@ struct devlink_ops {
int (*eswitch_inline_mode_set)(struct devlink *devlink, u8 inline_mode);
int (*eswitch_encap_mode_get)(struct devlink *devlink, u8
*p_encap_mode);
int (*eswitch_encap_mode_set)(struct devlink *devlink, u8 encap_mode);
+ int (*perm_config_get)(struct devlink *devlink,
+ enum devlink_perm_config_param param, u8 type,
+ void *value);
+ int (*perm_config_set)(struct devlink *devlink,
+ enum devlink_perm_config_param param, u8 type,
+ void *value, u8 *restart_reqd);
};
static inline void *devlink_priv(struct devlink *devlink)
diff --git a/include/uapi/linux/devlink.h b/include/uapi/linux/devlink.h
index 0cbca96..28ea961 100644
--- a/include/uapi/linux/devlink.h
+++ b/include/uapi/linux/devlink.h
@@ -70,6 +70,10 @@ enum devlink_command {
DEVLINK_CMD_DPIPE_HEADERS_GET,
DEVLINK_CMD_DPIPE_TABLE_COUNTERS_SET,
+ /* Permanent device config get/set */
+ DEVLINK_CMD_PERM_CONFIG_GET,
+ DEVLINK_CMD_PERM_CONFIG_SET,
+
/* add new commands above here */
__DEVLINK_CMD_MAX,
DEVLINK_CMD_MAX = __DEVLINK_CMD_MAX - 1
@@ -202,6 +206,14 @@ enum devlink_attr {
DEVLINK_ATTR_ESWITCH_ENCAP_MODE, /* u8 */
+ /* Permanent Configuration Parameters */
+ DEVLINK_ATTR_PERM_CONFIGS, /* nested */
+ DEVLINK_ATTR_PERM_CONFIG, /* nested */
+ DEVLINK_ATTR_PERM_CONFIG_PARAMETER, /* u32 */
+ DEVLINK_ATTR_PERM_CONFIG_TYPE, /* u8 */
+ DEVLINK_ATTR_PERM_CONFIG_VALUE, /* dynamic */
+ DEVLINK_ATTR_PERM_CONFIG_RESTART_REQUIRED, /* u8 */
+
/* add new attributes above here, update the policy in devlink.c */
__DEVLINK_ATTR_MAX,
@@ -244,4 +256,10 @@ enum devlink_dpipe_header_id {
DEVLINK_DPIPE_HEADER_IPV6,
};
+/* Permanent config parameters */
+enum devlink_perm_config_param {
+ __DEVLINK_PERM_CONFIG_MAX,
+ DEVLINK_PERM_CONFIG_MAX = __DEVLINK_PERM_CONFIG_MAX - 1
+};
+
#endif /* _UAPI_LINUX_DEVLINK_H_ */
diff --git a/net/core/devlink.c b/net/core/devlink.c
index 7d430c1..4deb4da 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -1566,6 +1566,285 @@ static int devlink_nl_cmd_eswitch_set_doit(struct
sk_buff *skb,
return 0;
}
+static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1];
+
+static const u8 devlink_perm_cfg_param_types[DEVLINK_PERM_CONFIG_MAX + 1] = {
+};
+
+static int devlink_nl_single_param_get(struct sk_buff *msg,
+ struct devlink *devlink,
+ u32 param, u8 type)
+{
+ const struct devlink_ops *ops = devlink->ops;
+ struct nlattr *param_attr;
+ void *value;
+ u32 val;
+ int err;
+
+ /* Allocate buffer for parameter value */
+ switch (type) {
+ case NLA_U8:
+ value = kmalloc(sizeof(u8), GFP_KERNEL);
+ break;
+ case NLA_U16:
+ value = kmalloc(sizeof(u16), GFP_KERNEL);
+ break;
+ case NLA_U32:
+ value = kmalloc(sizeof(u32), GFP_KERNEL);
+ break;
+ default:
+ return -EINVAL; /* Unsupported Type */
+ }
+
+ if (!value)
+ return -ENOMEM;
+
+ err = ops->perm_config_get(devlink, param, type, value);
+ if (err)
+ return err;
+
+ param_attr = nla_nest_start(msg, DEVLINK_ATTR_PERM_CONFIG);
+ if (!param_attr)
+ goto nonest_err;
+
+ if (nla_put_u32(msg, DEVLINK_ATTR_PERM_CONFIG_PARAMETER, param) ||
+ nla_put_u8(msg, DEVLINK_ATTR_PERM_CONFIG_TYPE, type))
+ goto nest_err;
+
+ switch (type) {
+ case NLA_U8:
+ val = *((u8 *)value);
+ if (nla_put_u8(msg, DEVLINK_ATTR_PERM_CONFIG_VALUE, val))
+ goto nest_err;
+ break;
+ case NLA_U16:
+ val = *((u16 *)value);
+ if (nla_put_u16(msg, DEVLINK_ATTR_PERM_CONFIG_VALUE, val))
+ goto nest_err;
+ break;
+ case NLA_U32:
+ val = *((u32 *)value);
+ if (nla_put_u32(msg, DEVLINK_ATTR_PERM_CONFIG_VALUE, val))
+ goto nest_err;
+ break;
+ }
+ nla_nest_end(msg, param_attr);
+
+ kfree(value);
+
+ return err;
+
+nest_err:
+ nla_nest_cancel(msg, param_attr);
+nonest_err:
+ kfree(value);
+
+ return -EMSGSIZE;
+}
+
+static int devlink_nl_config_get_fill(struct sk_buff *msg,
+ struct devlink *devlink,
+ enum devlink_command cmd,
+ struct genl_info *info)
+{
+ struct nlattr *tb[DEVLINK_ATTR_MAX + 1];
+ struct nlattr *cfgparam_attr;
+ struct nlattr *attr;
+ void *hdr;
+ u32 param;
+ int err;
+ int rem;
+ u8 type;
+
+ hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
+ &devlink_nl_family, 0, cmd);
+ if (!hdr)
+ return -EMSGSIZE;
+
+ err = devlink_nl_put_handle(msg, devlink);
+ if (err)
+ goto nla_put_failure;
+
+ if (!info->attrs[DEVLINK_ATTR_PERM_CONFIGS]) {
+ err = -EINVAL;
+ goto nla_put_failure;
+ }
+
+ cfgparam_attr = nla_nest_start(msg, DEVLINK_ATTR_PERM_CONFIGS);
+
+ nla_for_each_nested(attr, info->attrs[DEVLINK_ATTR_PERM_CONFIGS],
+ rem) {
+ err = nla_parse_nested(tb, DEVLINK_ATTR_MAX, attr,
+ devlink_nl_policy, NULL);
+ if (err)
+ goto nla_nest_failure;
+ if (!tb[DEVLINK_ATTR_PERM_CONFIG_PARAMETER] ||
+ !tb[DEVLINK_ATTR_PERM_CONFIG_TYPE])
+ continue;
+
+ param = nla_get_u32(tb[DEVLINK_ATTR_PERM_CONFIG_PARAMETER]);
+ type = nla_get_u8(tb[DEVLINK_ATTR_PERM_CONFIG_TYPE]);
+ if (param > DEVLINK_PERM_CONFIG_MAX ||
+ type > NLA_TYPE_MAX) {
+ continue;
+ }
+ /* Note if single_param_get fails, that param won't be in
+ * response msg, so caller will know which param(s) failed to
+ * get.
+ */
+ devlink_nl_single_param_get(msg, devlink, param, type);
+ }
+
+ nla_nest_end(msg, cfgparam_attr);
+
+ genlmsg_end(msg, hdr);
+ return 0;
+
+nla_nest_failure:
+ nla_nest_cancel(msg, cfgparam_attr);
+nla_put_failure:
+ genlmsg_cancel(msg, hdr);
+ return err;
+}
+
+static int devlink_nl_cmd_perm_config_get_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink *devlink = info->user_ptr[0];
+ struct sk_buff *msg;
+ int err;
+
+ if (!devlink->ops || !devlink->ops->perm_config_get)
+ return -EOPNOTSUPP;
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+
+ err = devlink_nl_config_get_fill(msg, devlink,
+ DEVLINK_CMD_PERM_CONFIG_GET, info);
+
+ if (err) {
+ nlmsg_free(msg);
+ return err;
+ }
+
+ return genlmsg_reply(msg, info);
+}
+
+static int devlink_nl_single_param_set(struct sk_buff *msg,
+ struct devlink *devlink,
+ u32 param, u8 type, void *value)
+{
+ const struct devlink_ops *ops = devlink->ops;
+ struct nlattr *cfgparam_attr;
+ u8 need_restart;
+ int err;
+
+ /* Now set parameter */
+ err = ops->perm_config_set(devlink, param, type, value, &need_restart);
+ if (err)
+ return err;
+
+ cfgparam_attr = nla_nest_start(msg, DEVLINK_ATTR_PERM_CONFIG);
+ /* Update restart reqd - if any param needs restart, should be set */
+ if (need_restart) {
+ err = nla_put_u8(msg,
+ DEVLINK_ATTR_PERM_CONFIG_RESTART_REQUIRED, 1);
+ if (err)
+ goto nest_fail;
+ }
+
+ /* Since set was successful, write attr back to msg */
+ err = nla_put_u32(msg, DEVLINK_ATTR_PERM_CONFIG_PARAMETER, param);
+ if (err)
+ goto nest_fail;
+
+ nla_nest_end(msg, cfgparam_attr);
+
+ return 0;
+
+nest_fail:
+ nla_nest_cancel(msg, cfgparam_attr);
+ return err;
+}
+
+static int devlink_nl_cmd_perm_config_set_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink *devlink = info->user_ptr[0];
+ struct nlattr *tb[DEVLINK_ATTR_MAX + 1];
+ struct nlattr *cfgparam_attr;
+ struct sk_buff *msg;
+ struct nlattr *attr;
+ void *value;
+ void *hdr;
+ u32 param;
+ u8 type;
+ int rem;
+ int err;
+
+ if (!devlink->ops || !devlink->ops->perm_config_get ||
+ !devlink->ops->perm_config_set)
+ return -EOPNOTSUPP;
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+
+ hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
+ &devlink_nl_family, 0, DEVLINK_CMD_PERM_CONFIG_SET);
+ if (!hdr) {
+ err = -EMSGSIZE;
+ goto nla_msg_failure;
+ }
+
+ err = devlink_nl_put_handle(msg, devlink);
+ if (err)
+ goto nla_put_failure;
+
+ cfgparam_attr = nla_nest_start(msg, DEVLINK_ATTR_PERM_CONFIGS);
+
+ nla_for_each_nested(attr, info->attrs[DEVLINK_ATTR_PERM_CONFIGS], rem) {
+ err = nla_parse_nested(tb, DEVLINK_ATTR_MAX, attr,
+ devlink_nl_policy, NULL);
+ if (err)
+ goto nla_nest_failure;
+
+ if (!tb[DEVLINK_ATTR_PERM_CONFIG_PARAMETER] ||
+ !tb[DEVLINK_ATTR_PERM_CONFIG_TYPE] ||
+ !tb[DEVLINK_ATTR_PERM_CONFIG_VALUE])
+ continue;
+
+ param = nla_get_u32(tb[DEVLINK_ATTR_PERM_CONFIG_PARAMETER]);
+ type = nla_get_u8(tb[DEVLINK_ATTR_PERM_CONFIG_TYPE]);
+ if (param > DEVLINK_PERM_CONFIG_MAX ||
+ type > NLA_TYPE_MAX) {
+ continue;
+ }
+
+ value = nla_data(tb[DEVLINK_ATTR_PERM_CONFIG_VALUE]);
+
+ /* Note if single_param_set fails, that param won't be in
+ * response msg, so caller will know which param(s) failed to
+ * set.
+ */
+ devlink_nl_single_param_set(msg, devlink, param, type, value);
+ }
+
+ nla_nest_end(msg, cfgparam_attr);
+
+ genlmsg_end(msg, hdr);
+ return genlmsg_reply(msg, info);
+
+nla_nest_failure:
+ nla_nest_cancel(msg, cfgparam_attr);
+nla_put_failure:
+ genlmsg_cancel(msg, hdr);
+nla_msg_failure:
+ return err;
+}
+
int devlink_dpipe_match_put(struct sk_buff *skb,
struct devlink_dpipe_match *match)
{
@@ -2291,6 +2570,8 @@ static const struct nla_policy
devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
[DEVLINK_ATTR_ESWITCH_ENCAP_MODE] = { .type = NLA_U8 },
[DEVLINK_ATTR_DPIPE_TABLE_NAME] = { .type = NLA_NUL_STRING },
[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED] = { .type = NLA_U8 },
+ [DEVLINK_ATTR_PERM_CONFIG_PARAMETER] = { .type = NLA_U32 },
+ [DEVLINK_ATTR_PERM_CONFIG_TYPE] = { .type = NLA_U8 },
};
static const struct genl_ops devlink_nl_ops[] = {
@@ -2451,6 +2732,20 @@ static const struct genl_ops devlink_nl_ops[] = {
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
},
+ {
+ .cmd = DEVLINK_CMD_PERM_CONFIG_GET,
+ .doit = devlink_nl_cmd_perm_config_get_doit,
+ .policy = devlink_nl_policy,
+ .flags = GENL_ADMIN_PERM,
+ .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
+ },
+ {
+ .cmd = DEVLINK_CMD_PERM_CONFIG_SET,
+ .doit = devlink_nl_cmd_perm_config_set_doit,
+ .policy = devlink_nl_policy,
+ .flags = GENL_ADMIN_PERM,
+ .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
+ },
};
static struct genl_family devlink_nl_family __ro_after_init = {
--
2.7.4
