[PATCH net-next v3 4/7] devlink: Implement devlink health reporters on per-port basis
From: Moshe Shemesh
Date: Fri Jul 10 2020 - 08:26:21 EST
From: Vladyslav Tarasiuk <vladyslavt@xxxxxxxxxxxx>
Add devlink-health reporter support on per-port basis.
The main difference existing devlink-health is that port reporters are
stored in per-devlink_port lists. Upon creation of such health reporter the
reference to a port it belongs to is stored in reporter struct.
Fill the port index attribute in devlink-health response to
allow devlink userspace utility to distinguish between device and port
reporters.
Signed-off-by: Vladyslav Tarasiuk <vladyslavt@xxxxxxxxxxxx>
Reviewed-by: Moshe Shemesh <moshe@xxxxxxxxxxxx>
Reviewed-by: Jiri Pirko <jiri@xxxxxxxxxxxx>
---
include/net/devlink.h | 2 ++
net/core/devlink.c | 94 +++++++++++++++++++++++++++++++++++++++++----------
2 files changed, 79 insertions(+), 17 deletions(-)
diff --git a/include/net/devlink.h b/include/net/devlink.h
index 746bed5..bb11397 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -101,6 +101,8 @@ struct devlink_port {
u8 attrs_set:1,
switch_port:1;
struct delayed_work type_warn_dw;
+ struct list_head reporter_list;
+ struct mutex reporters_lock; /* Protects reporter_list */
};
struct devlink_sb_pool_info {
diff --git a/net/core/devlink.c b/net/core/devlink.c
index 4e995de..b4a231c 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -386,19 +386,21 @@ struct devlink_snapshot {
return NULL;
}
-#define DEVLINK_NL_FLAG_NEED_DEVLINK BIT(0)
-#define DEVLINK_NL_FLAG_NEED_PORT BIT(1)
-#define DEVLINK_NL_FLAG_NEED_SB BIT(2)
+#define DEVLINK_NL_FLAG_NEED_DEVLINK BIT(0)
+#define DEVLINK_NL_FLAG_NEED_PORT BIT(1)
+#define DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT BIT(2)
+#define DEVLINK_NL_FLAG_NEED_SB BIT(3)
/* The per devlink instance lock is taken by default in the pre-doit
* operation, yet several commands do not require this. The global
* devlink lock is taken and protects from disruption by user-calls.
*/
-#define DEVLINK_NL_FLAG_NO_LOCK BIT(3)
+#define DEVLINK_NL_FLAG_NO_LOCK BIT(4)
static int devlink_nl_pre_doit(const struct genl_ops *ops,
struct sk_buff *skb, struct genl_info *info)
{
+ struct devlink_port *devlink_port;
struct devlink *devlink;
int err;
@@ -413,14 +415,17 @@ static int devlink_nl_pre_doit(const struct genl_ops *ops,
if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_DEVLINK) {
info->user_ptr[0] = devlink;
} else if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_PORT) {
- struct devlink_port *devlink_port;
-
devlink_port = devlink_port_get_from_info(devlink, info);
if (IS_ERR(devlink_port)) {
err = PTR_ERR(devlink_port);
goto unlock;
}
info->user_ptr[0] = devlink_port;
+ } else if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT) {
+ info->user_ptr[0] = devlink;
+ devlink_port = devlink_port_get_from_info(devlink, info);
+ if (!IS_ERR(devlink_port))
+ info->user_ptr[1] = devlink_port;
}
if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_SB) {
struct devlink_sb *devlink_sb;
@@ -5287,6 +5292,7 @@ struct devlink_health_reporter {
void *priv;
const struct devlink_health_reporter_ops *ops;
struct devlink *devlink;
+ struct devlink_port *devlink_port;
struct devlink_fmsg *dump_fmsg;
struct mutex dump_lock; /* lock parallel read/write from dump buffers */
u64 graceful_period;
@@ -5332,6 +5338,15 @@ struct devlink_health_reporter {
}
static struct devlink_health_reporter *
+devlink_port_health_reporter_find_by_name(struct devlink_port *devlink_port,
+ const char *reporter_name)
+{
+ return __devlink_health_reporter_find_by_name(&devlink_port->reporter_list,
+ &devlink_port->reporters_lock,
+ reporter_name);
+}
+
+static struct devlink_health_reporter *
__devlink_health_reporter_create(struct devlink *devlink,
const struct devlink_health_reporter_ops *ops,
u64 graceful_period, void *priv)
@@ -5443,6 +5458,10 @@ struct devlink_health_reporter *
if (devlink_nl_put_handle(msg, devlink))
goto genlmsg_cancel;
+ if (reporter->devlink_port) {
+ if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, reporter->devlink_port->index))
+ goto genlmsg_cancel;
+ }
reporter_attr = nla_nest_start_noflag(msg,
DEVLINK_ATTR_HEALTH_REPORTER);
if (!reporter_attr)
@@ -5650,17 +5669,28 @@ int devlink_health_report(struct devlink_health_reporter *reporter,
struct nlattr **attrs)
{
struct devlink_health_reporter *reporter;
+ struct devlink_port *devlink_port;
char *reporter_name;
if (!attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME])
return NULL;
reporter_name = nla_data(attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME]);
- mutex_lock(&devlink->reporters_lock);
- reporter = devlink_health_reporter_find_by_name(devlink, reporter_name);
- if (reporter)
- refcount_inc(&reporter->refcount);
- mutex_unlock(&devlink->reporters_lock);
+ devlink_port = devlink_port_get_from_attrs(devlink, attrs);
+ if (IS_ERR(devlink_port)) {
+ mutex_lock(&devlink->reporters_lock);
+ reporter = devlink_health_reporter_find_by_name(devlink, reporter_name);
+ if (reporter)
+ refcount_inc(&reporter->refcount);
+ mutex_unlock(&devlink->reporters_lock);
+ } else {
+ mutex_lock(&devlink_port->reporters_lock);
+ reporter = devlink_port_health_reporter_find_by_name(devlink_port, reporter_name);
+ if (reporter)
+ refcount_inc(&reporter->refcount);
+ mutex_unlock(&devlink_port->reporters_lock);
+ }
+
return reporter;
}
@@ -5748,6 +5778,7 @@ static int devlink_nl_cmd_health_reporter_get_doit(struct sk_buff *skb,
struct netlink_callback *cb)
{
struct devlink_health_reporter *reporter;
+ struct devlink_port *port;
struct devlink *devlink;
int start = cb->args[0];
int idx = 0;
@@ -5778,6 +5809,31 @@ static int devlink_nl_cmd_health_reporter_get_doit(struct sk_buff *skb,
}
mutex_unlock(&devlink->reporters_lock);
}
+
+ list_for_each_entry(devlink, &devlink_list, list) {
+ if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
+ continue;
+ list_for_each_entry(port, &devlink->port_list, list) {
+ mutex_lock(&port->reporters_lock);
+ list_for_each_entry(reporter, &port->reporter_list, list) {
+ if (idx < start) {
+ idx++;
+ continue;
+ }
+ err = devlink_nl_health_reporter_fill(msg, devlink, reporter,
+ DEVLINK_CMD_HEALTH_REPORTER_GET,
+ NETLINK_CB(cb->skb).portid,
+ cb->nlh->nlmsg_seq,
+ NLM_F_MULTI);
+ if (err) {
+ mutex_unlock(&port->reporters_lock);
+ goto out;
+ }
+ idx++;
+ }
+ mutex_unlock(&port->reporters_lock);
+ }
+ }
out:
mutex_unlock(&devlink_mutex);
@@ -7157,7 +7213,7 @@ static int devlink_nl_cmd_trap_policer_set_doit(struct sk_buff *skb,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_health_reporter_get_doit,
.dumpit = devlink_nl_cmd_health_reporter_get_dumpit,
- .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
+ .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT |
DEVLINK_NL_FLAG_NO_LOCK,
/* can be retrieved by unprivileged users */
},
@@ -7166,7 +7222,7 @@ static int devlink_nl_cmd_trap_policer_set_doit(struct sk_buff *skb,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_health_reporter_set_doit,
.flags = GENL_ADMIN_PERM,
- .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
+ .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT |
DEVLINK_NL_FLAG_NO_LOCK,
},
{
@@ -7174,7 +7230,7 @@ static int devlink_nl_cmd_trap_policer_set_doit(struct sk_buff *skb,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_health_reporter_recover_doit,
.flags = GENL_ADMIN_PERM,
- .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
+ .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT |
DEVLINK_NL_FLAG_NO_LOCK,
},
{
@@ -7182,7 +7238,7 @@ static int devlink_nl_cmd_trap_policer_set_doit(struct sk_buff *skb,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_health_reporter_diagnose_doit,
.flags = GENL_ADMIN_PERM,
- .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
+ .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT |
DEVLINK_NL_FLAG_NO_LOCK,
},
{
@@ -7191,7 +7247,7 @@ static int devlink_nl_cmd_trap_policer_set_doit(struct sk_buff *skb,
GENL_DONT_VALIDATE_DUMP_STRICT,
.dumpit = devlink_nl_cmd_health_reporter_dump_get_dumpit,
.flags = GENL_ADMIN_PERM,
- .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
+ .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT |
DEVLINK_NL_FLAG_NO_LOCK,
},
{
@@ -7199,7 +7255,7 @@ static int devlink_nl_cmd_trap_policer_set_doit(struct sk_buff *skb,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_health_reporter_dump_clear_doit,
.flags = GENL_ADMIN_PERM,
- .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
+ .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT |
DEVLINK_NL_FLAG_NO_LOCK,
},
{
@@ -7459,6 +7515,8 @@ int devlink_port_register(struct devlink *devlink,
list_add_tail(&devlink_port->list, &devlink->port_list);
INIT_LIST_HEAD(&devlink_port->param_list);
mutex_unlock(&devlink->lock);
+ INIT_LIST_HEAD(&devlink_port->reporter_list);
+ mutex_init(&devlink_port->reporters_lock);
INIT_DELAYED_WORK(&devlink_port->type_warn_dw, &devlink_port_type_warn);
devlink_port_type_warn_schedule(devlink_port);
devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
@@ -7475,6 +7533,8 @@ void devlink_port_unregister(struct devlink_port *devlink_port)
{
struct devlink *devlink = devlink_port->devlink;
+ WARN_ON(!list_empty(&devlink_port->reporter_list));
+ mutex_destroy(&devlink_port->reporters_lock);
devlink_port_type_warn_cancel(devlink_port);
devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL);
mutex_lock(&devlink->lock);
--
1.8.3.1