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Message-Id: <20221130085250.2141430-1-jiri@resnulli.us>
Date: Wed, 30 Nov 2022 09:52:50 +0100
From: Jiri Pirko <jiri@...nulli.us>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
edumazet@...gle.com
Subject: [patch net-next v3] net: devlink: convert port_list into xarray
From: Jiri Pirko <jiri@...dia.com>
Some devlink instances may contain thousands of ports. Storing them in
linked list and looking them up is not scalable. Convert the linked list
into xarray.
Signed-off-by: Jiri Pirko <jiri@...dia.com>
---
v2->v3:
- re-added warnon for empty array
v1->v2:
- use xa_insert() instead of xa_alloc()
---
net/core/devlink.c | 57 ++++++++++++++++++++++------------------------
1 file changed, 27 insertions(+), 30 deletions(-)
diff --git a/net/core/devlink.c b/net/core/devlink.c
index 0e10a8a68c5e..b92901a37d6c 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -41,7 +41,7 @@ struct devlink_dev_stats {
struct devlink {
u32 index;
- struct list_head port_list;
+ struct xarray ports;
struct list_head rate_list;
struct list_head sb_list;
struct list_head dpipe_table_list;
@@ -382,19 +382,7 @@ static struct devlink *devlink_get_from_attrs(struct net *net,
static struct devlink_port *devlink_port_get_by_index(struct devlink *devlink,
unsigned int port_index)
{
- struct devlink_port *devlink_port;
-
- list_for_each_entry(devlink_port, &devlink->port_list, list) {
- if (devlink_port->index == port_index)
- return devlink_port;
- }
- return NULL;
-}
-
-static bool devlink_port_index_exists(struct devlink *devlink,
- unsigned int port_index)
-{
- return devlink_port_get_by_index(devlink, port_index);
+ return xa_load(&devlink->ports, port_index);
}
static struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink,
@@ -1565,14 +1553,14 @@ static int devlink_nl_cmd_port_get_dumpit(struct sk_buff *msg,
{
struct devlink *devlink;
struct devlink_port *devlink_port;
+ unsigned long index, port_index;
int start = cb->args[0];
- unsigned long index;
int idx = 0;
int err;
devlinks_xa_for_each_registered_get(sock_net(msg->sk), index, devlink) {
devl_lock(devlink);
- list_for_each_entry(devlink_port, &devlink->port_list, list) {
+ xa_for_each(&devlink->ports, port_index, devlink_port) {
if (idx < start) {
idx++;
continue;
@@ -2886,10 +2874,11 @@ static int __sb_port_pool_get_dumpit(struct sk_buff *msg, int start, int *p_idx,
{
struct devlink_port *devlink_port;
u16 pool_count = devlink_sb_pool_count(devlink_sb);
+ unsigned long port_index;
u16 pool_index;
int err;
- list_for_each_entry(devlink_port, &devlink->port_list, list) {
+ xa_for_each(&devlink->ports, port_index, devlink_port) {
for (pool_index = 0; pool_index < pool_count; pool_index++) {
if (*p_idx < start) {
(*p_idx)++;
@@ -3107,10 +3096,11 @@ static int __sb_tc_pool_bind_get_dumpit(struct sk_buff *msg,
u32 portid, u32 seq)
{
struct devlink_port *devlink_port;
+ unsigned long port_index;
u16 tc_index;
int err;
- list_for_each_entry(devlink_port, &devlink->port_list, list) {
+ xa_for_each(&devlink->ports, port_index, devlink_port) {
for (tc_index = 0;
tc_index < devlink_sb->ingress_tc_count; tc_index++) {
if (*p_idx < start) {
@@ -6207,6 +6197,7 @@ static int devlink_nl_cmd_region_get_devlink_dumpit(struct sk_buff *msg,
{
struct devlink_region *region;
struct devlink_port *port;
+ unsigned long port_index;
int err = 0;
devl_lock(devlink);
@@ -6225,7 +6216,7 @@ static int devlink_nl_cmd_region_get_devlink_dumpit(struct sk_buff *msg,
(*idx)++;
}
- list_for_each_entry(port, &devlink->port_list, list) {
+ xa_for_each(&devlink->ports, port_index, port) {
err = devlink_nl_cmd_region_get_port_dumpit(msg, cb, port, idx,
start);
if (err)
@@ -7974,10 +7965,10 @@ devlink_nl_cmd_health_reporter_get_dumpit(struct sk_buff *msg,
struct netlink_callback *cb)
{
struct devlink_health_reporter *reporter;
+ unsigned long index, port_index;
struct devlink_port *port;
struct devlink *devlink;
int start = cb->args[0];
- unsigned long index;
int idx = 0;
int err;
@@ -8006,7 +7997,7 @@ devlink_nl_cmd_health_reporter_get_dumpit(struct sk_buff *msg,
devlinks_xa_for_each_registered_get(sock_net(msg->sk), index, devlink) {
devl_lock(devlink);
- list_for_each_entry(port, &devlink->port_list, list) {
+ xa_for_each(&devlink->ports, port_index, port) {
mutex_lock(&port->reporters_lock);
list_for_each_entry(reporter, &port->reporter_list, list) {
if (idx < start) {
@@ -9724,9 +9715,9 @@ struct devlink *devlink_alloc_ns(const struct devlink_ops *ops,
devlink->dev = dev;
devlink->ops = ops;
+ xa_init_flags(&devlink->ports, XA_FLAGS_ALLOC);
xa_init_flags(&devlink->snapshot_ids, XA_FLAGS_ALLOC);
write_pnet(&devlink->_net, net);
- INIT_LIST_HEAD(&devlink->port_list);
INIT_LIST_HEAD(&devlink->rate_list);
INIT_LIST_HEAD(&devlink->linecard_list);
INIT_LIST_HEAD(&devlink->sb_list);
@@ -9778,12 +9769,13 @@ static void devlink_notify_register(struct devlink *devlink)
struct devlink_linecard *linecard;
struct devlink_rate *rate_node;
struct devlink_region *region;
+ unsigned long port_index;
devlink_notify(devlink, DEVLINK_CMD_NEW);
list_for_each_entry(linecard, &devlink->linecard_list, list)
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
- list_for_each_entry(devlink_port, &devlink->port_list, list)
+ xa_for_each(&devlink->ports, port_index, devlink_port)
devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
list_for_each_entry(policer_item, &devlink->trap_policer_list, list)
@@ -9817,6 +9809,7 @@ static void devlink_notify_unregister(struct devlink *devlink)
struct devlink_port *devlink_port;
struct devlink_rate *rate_node;
struct devlink_region *region;
+ unsigned long port_index;
list_for_each_entry_reverse(param_item, &devlink->param_list, list)
devlink_param_notify(devlink, 0, param_item,
@@ -9839,7 +9832,7 @@ static void devlink_notify_unregister(struct devlink *devlink)
devlink_trap_policer_notify(devlink, policer_item,
DEVLINK_CMD_TRAP_POLICER_DEL);
- list_for_each_entry_reverse(devlink_port, &devlink->port_list, list)
+ xa_for_each(&devlink->ports, port_index, devlink_port)
devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL);
devlink_notify(devlink, DEVLINK_CMD_DEL);
}
@@ -9903,9 +9896,10 @@ void devlink_free(struct devlink *devlink)
WARN_ON(!list_empty(&devlink->sb_list));
WARN_ON(!list_empty(&devlink->rate_list));
WARN_ON(!list_empty(&devlink->linecard_list));
- WARN_ON(!list_empty(&devlink->port_list));
+ WARN_ON(!xa_empty(&devlink->ports));
xa_destroy(&devlink->snapshot_ids);
+ xa_destroy(&devlink->ports);
WARN_ON_ONCE(unregister_netdevice_notifier_net(devlink_net(devlink),
&devlink->netdevice_nb));
@@ -10004,10 +9998,9 @@ int devl_port_register(struct devlink *devlink,
struct devlink_port *devlink_port,
unsigned int port_index)
{
- devl_assert_locked(devlink);
+ int err;
- if (devlink_port_index_exists(devlink, port_index))
- return -EEXIST;
+ devl_assert_locked(devlink);
ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);
@@ -10017,7 +10010,11 @@ int devl_port_register(struct devlink *devlink,
spin_lock_init(&devlink_port->type_lock);
INIT_LIST_HEAD(&devlink_port->reporter_list);
mutex_init(&devlink_port->reporters_lock);
- list_add_tail(&devlink_port->list, &devlink->port_list);
+ err = xa_insert(&devlink->ports, port_index, devlink_port, GFP_KERNEL);
+ if (err) {
+ mutex_destroy(&devlink_port->reporters_lock);
+ return err;
+ }
INIT_DELAYED_WORK(&devlink_port->type_warn_dw, &devlink_port_type_warn);
devlink_port_type_warn_schedule(devlink_port);
@@ -10066,7 +10063,7 @@ void devl_port_unregister(struct devlink_port *devlink_port)
devlink_port_type_warn_cancel(devlink_port);
devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL);
- list_del(&devlink_port->list);
+ xa_erase(&devlink_port->devlink->ports, devlink_port->index);
WARN_ON(!list_empty(&devlink_port->reporter_list));
mutex_destroy(&devlink_port->reporters_lock);
devlink_port->registered = false;
--
2.37.3
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