devlink: Add health diagnose command
authorEran Ben Elisha <eranbe@mellanox.com>
Thu, 7 Feb 2019 09:36:38 +0000 (11:36 +0200)
committerDavid S. Miller <davem@davemloft.net>
Thu, 7 Feb 2019 18:34:28 +0000 (10:34 -0800)
Add devlink health diagnose command, in order to run a diagnose
operation over a specific reporter.

It is expected from driver's callback for diagnose command to fill it
via the devlink fmsg API. Devlink will parse it and convert it to
netlink nla API in order to pass it to the user.

Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Reviewed-by: Moshe Shemesh <moshe@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
include/uapi/linux/devlink.h
net/core/devlink.c

index a3a97e6edad80957e3f0ebd30acfe717c4e208b1..09be37137841ade969fd388ca894af68290f8b90 100644 (file)
@@ -99,6 +99,7 @@ enum devlink_command {
        DEVLINK_CMD_HEALTH_REPORTER_GET,
        DEVLINK_CMD_HEALTH_REPORTER_SET,
        DEVLINK_CMD_HEALTH_REPORTER_RECOVER,
+       DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE,
 
        /* add new commands above here */
        __DEVLINK_CMD_MAX,
index 0e6b0e03486392ddec93241b6e88fc3b626ad6c6..1e8613db2bf74c54f4bb064951ff668f297528c7 100644 (file)
@@ -4752,6 +4752,45 @@ static int devlink_nl_cmd_health_reporter_recover_doit(struct sk_buff *skb,
        return devlink_health_reporter_recover(reporter, NULL);
 }
 
+static int devlink_nl_cmd_health_reporter_diagnose_doit(struct sk_buff *skb,
+                                                       struct genl_info *info)
+{
+       struct devlink *devlink = info->user_ptr[0];
+       struct devlink_health_reporter *reporter;
+       struct devlink_fmsg *fmsg;
+       int err;
+
+       reporter = devlink_health_reporter_get_from_info(devlink, info);
+       if (!reporter)
+               return -EINVAL;
+
+       if (!reporter->ops->diagnose)
+               return -EOPNOTSUPP;
+
+       fmsg = devlink_fmsg_alloc();
+       if (!fmsg)
+               return -ENOMEM;
+
+       err = devlink_fmsg_obj_nest_start(fmsg);
+       if (err)
+               goto out;
+
+       err = reporter->ops->diagnose(reporter, fmsg);
+       if (err)
+               goto out;
+
+       err = devlink_fmsg_obj_nest_end(fmsg);
+       if (err)
+               goto out;
+
+       err = devlink_fmsg_snd(fmsg, info,
+                              DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE, 0);
+
+out:
+       devlink_fmsg_free(fmsg);
+       return err;
+}
+
 static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
        [DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING },
        [DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING },
@@ -5045,6 +5084,13 @@ static const struct genl_ops devlink_nl_ops[] = {
                .flags = GENL_ADMIN_PERM,
                .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
        },
+       {
+               .cmd = DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE,
+               .doit = devlink_nl_cmd_health_reporter_diagnose_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 = {