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Message-Id: <1508440630-25830-2-git-send-email-steven.lin1@broadcom.com>
Date: Thu, 19 Oct 2017 15:17:05 -0400
From: Steve Lin <steven.lin1@...adcom.com>
To: netdev@...r.kernel.org
Cc: jiri@...lanox.com, davem@...emloft.net, michael.chan@...adcom.com,
linville@...driver.com, gospo@...adcom.com,
steven.lin1@...adcom.com
Subject: [PATCH net-next v2 1/6] devlink: Add permanent config parameter get/set operations
Add support for permanent config parameter get/set commands. Used
for parameters held in NVRAM, persistent device configuration.
Signed-off-by: Steve Lin <steven.lin1@...adcom.com>
Acked-by: Andy Gospodarek <gospo@...adcom.com>
---
include/net/devlink.h | 3 +
include/uapi/linux/devlink.h | 11 ++
net/core/devlink.c | 234 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 248 insertions(+)
diff --git a/include/net/devlink.h b/include/net/devlink.h
index b9654e1..bd64623 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -270,6 +270,9 @@ 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, u32 param, u32 *value);
+ int (*perm_config_set)(struct devlink *devlink, u32 param, u32 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..47cc584 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 (NVRAM) 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 +206,13 @@ 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_VALUE, /* u32 */
+ DEVLINK_ATTR_PERM_CONFIG_RESTART_REQUIRED, /* u8 */
+
/* add new attributes above here, update the policy in devlink.c */
__DEVLINK_ATTR_MAX,
diff --git a/net/core/devlink.c b/net/core/devlink.c
index 7d430c1..c2cc7c6 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -1566,6 +1566,224 @@ 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 int devlink_nl_single_param_get(struct sk_buff *msg,
+ struct devlink *devlink,
+ uint32_t param)
+{
+ u32 value;
+ int err;
+ const struct devlink_ops *ops = devlink->ops;
+ struct nlattr *param_attr;
+
+ err = ops->perm_config_get(devlink, param, &value);
+ if (err)
+ return err;
+
+ param_attr = nla_nest_start(msg, DEVLINK_ATTR_PERM_CONFIG);
+ nla_put_u32(msg, DEVLINK_ATTR_PERM_CONFIG_PARAMETER, param);
+ nla_put_u32(msg, DEVLINK_ATTR_PERM_CONFIG_VALUE, value);
+ nla_nest_end(msg, param_attr);
+
+ return 0;
+}
+
+static int devlink_nl_config_get_fill(struct sk_buff *msg,
+ struct devlink *devlink,
+ enum devlink_command cmd,
+ struct genl_info *info)
+{
+ void *hdr;
+ int err;
+ struct nlattr *attr;
+ int param_count = 0;
+ struct nlattr *cfgparam_attr;
+ int rem;
+ struct nlattr *tb[DEVLINK_ATTR_MAX + 1];
+ u32 param;
+
+ hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
+ &devlink_nl_family, 0, cmd);
+ if (!hdr) {
+ err = -EMSGSIZE;
+ goto nla_msg_failure;
+ }
+
+ err = devlink_nl_put_handle(msg, devlink);
+ if (err)
+ goto nla_put_failure;
+
+ if (!info->attrs[DEVLINK_ATTR_PERM_CONFIGS]) {
+ /* No configuration parameters */
+ 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])
+ continue;
+
+ param = nla_get_u32(tb[DEVLINK_ATTR_PERM_CONFIG_PARAMETER]);
+ err = devlink_nl_single_param_get(msg, devlink, param);
+ if (err)
+ goto nla_nest_failure;
+ param_count++;
+ }
+
+ 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);
+nla_msg_failure:
+ 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, u32 value)
+{
+ u32 orig_value;
+ u8 need_restart;
+ int err;
+ const struct devlink_ops *ops = devlink->ops;
+ struct nlattr *cfgparam_attr;
+
+ /* First get current value of parameter */
+ err = ops->perm_config_get(devlink, param, &orig_value);
+ if (err)
+ return err;
+
+ /* Now set parameter */
+ err = ops->perm_config_set(devlink, param, 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);
+
+ /* Since set was successful, write attr back to msg with orig val */
+ err = nla_put_u32(msg, DEVLINK_ATTR_PERM_CONFIG_PARAMETER, param);
+ err = nla_put_u32(msg, DEVLINK_ATTR_PERM_CONFIG_VALUE, orig_value);
+
+ nla_nest_end(msg, cfgparam_attr);
+
+ return 0;
+}
+
+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 sk_buff *msg;
+ void *hdr;
+ struct nlattr *attr;
+ int rem;
+ int err;
+ u8 restart_reqd = 0;
+ struct nlattr *cfgparam_attr;
+ struct nlattr *tb[DEVLINK_ATTR_MAX + 1];
+ u32 param;
+ u32 value;
+
+ 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_VALUE])
+ continue;
+
+ param = nla_get_u32(tb[DEVLINK_ATTR_PERM_CONFIG_PARAMETER]);
+ value = nla_get_u32(tb[DEVLINK_ATTR_PERM_CONFIG_VALUE]);
+ err = devlink_nl_single_param_set(msg, devlink, param,
+ value);
+ if (err)
+ goto nla_nest_failure;
+ }
+
+ nla_nest_end(msg, cfgparam_attr);
+
+ if (restart_reqd) {
+ err = nla_put_u8(msg, DEVLINK_ATTR_PERM_CONFIG_RESTART_REQUIRED,
+ restart_reqd);
+ if (err)
+ goto nla_put_failure;
+ }
+
+ 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 +2509,8 @@ 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_VALUE] = { .type = NLA_U32 },
};
static const struct genl_ops devlink_nl_ops[] = {
@@ -2451,6 +2671,20 @@ 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
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