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Message-Id: <20200322184830.1254104-5-idosch@idosch.org>
Date: Sun, 22 Mar 2020 20:48:29 +0200
From: Ido Schimmel <idosch@...sch.org>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, jiri@...lanox.com, kuba@...nel.org,
mlxsw@...lanox.com, Ido Schimmel <idosch@...lanox.com>
Subject: [PATCH net-next 4/5] devlink: Stop reference counting packet trap groups
From: Ido Schimmel <idosch@...lanox.com>
Now that drivers explicitly register their supported packet trap groups
there is no for devlink to create them on-demand and destroy them when
their reference count reaches zero.
Signed-off-by: Ido Schimmel <idosch@...lanox.com>
Reviewed-by: Jiri Pirko <jiri@...lanox.com>
---
net/core/devlink.c | 101 +++------------------------------------------
1 file changed, 5 insertions(+), 96 deletions(-)
diff --git a/net/core/devlink.c b/net/core/devlink.c
index 089a220aabab..a35285a48b02 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -5456,16 +5456,14 @@ struct devlink_stats {
/**
* struct devlink_trap_group_item - Packet trap group attributes.
* @group: Immutable packet trap group attributes.
- * @refcount: Number of trap items using the group.
* @list: trap_group_list member.
* @stats: Trap group statistics.
*
* Describes packet trap group attributes. Created by devlink during trap
- * registration.
+ * group registration.
*/
struct devlink_trap_group_item {
const struct devlink_trap_group *group;
- refcount_t refcount;
struct list_head list;
struct devlink_stats __percpu *stats;
};
@@ -7937,108 +7935,22 @@ devlink_trap_group_notify(struct devlink *devlink,
msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
}
-static struct devlink_trap_group_item *
-devlink_trap_group_item_create(struct devlink *devlink,
- const struct devlink_trap_group *group)
-{
- struct devlink_trap_group_item *group_item;
- int err;
-
- err = devlink_trap_group_verify(group);
- if (err)
- return ERR_PTR(err);
-
- group_item = kzalloc(sizeof(*group_item), GFP_KERNEL);
- if (!group_item)
- return ERR_PTR(-ENOMEM);
-
- group_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats);
- if (!group_item->stats) {
- err = -ENOMEM;
- goto err_stats_alloc;
- }
-
- group_item->group = group;
- refcount_set(&group_item->refcount, 1);
-
- if (devlink->ops->trap_group_init) {
- err = devlink->ops->trap_group_init(devlink, group);
- if (err)
- goto err_group_init;
- }
-
- list_add_tail(&group_item->list, &devlink->trap_group_list);
- devlink_trap_group_notify(devlink, group_item,
- DEVLINK_CMD_TRAP_GROUP_NEW);
-
- return group_item;
-
-err_group_init:
- free_percpu(group_item->stats);
-err_stats_alloc:
- kfree(group_item);
- return ERR_PTR(err);
-}
-
-static void
-devlink_trap_group_item_destroy(struct devlink *devlink,
- struct devlink_trap_group_item *group_item)
-{
- devlink_trap_group_notify(devlink, group_item,
- DEVLINK_CMD_TRAP_GROUP_DEL);
- list_del(&group_item->list);
- free_percpu(group_item->stats);
- kfree(group_item);
-}
-
-static struct devlink_trap_group_item *
-devlink_trap_group_item_get(struct devlink *devlink,
- const struct devlink_trap_group *group)
-{
- struct devlink_trap_group_item *group_item;
-
- group_item = devlink_trap_group_item_lookup(devlink, group->name);
- if (group_item) {
- refcount_inc(&group_item->refcount);
- return group_item;
- }
-
- return devlink_trap_group_item_create(devlink, group);
-}
-
-static void
-devlink_trap_group_item_put(struct devlink *devlink,
- struct devlink_trap_group_item *group_item)
-{
- if (!refcount_dec_and_test(&group_item->refcount))
- return;
-
- devlink_trap_group_item_destroy(devlink, group_item);
-}
-
static int
devlink_trap_item_group_link(struct devlink *devlink,
struct devlink_trap_item *trap_item)
{
+ const struct devlink_trap *trap = trap_item->trap;
struct devlink_trap_group_item *group_item;
- group_item = devlink_trap_group_item_get(devlink,
- &trap_item->trap->group);
- if (IS_ERR(group_item))
- return PTR_ERR(group_item);
+ group_item = devlink_trap_group_item_lookup(devlink, trap->group.name);
+ if (WARN_ON_ONCE(!group_item))
+ return -EINVAL;
trap_item->group_item = group_item;
return 0;
}
-static void
-devlink_trap_item_group_unlink(struct devlink *devlink,
- struct devlink_trap_item *trap_item)
-{
- devlink_trap_group_item_put(devlink, trap_item->group_item);
-}
-
static void devlink_trap_notify(struct devlink *devlink,
const struct devlink_trap_item *trap_item,
enum devlink_command cmd)
@@ -8101,7 +8013,6 @@ devlink_trap_register(struct devlink *devlink,
return 0;
err_trap_init:
- devlink_trap_item_group_unlink(devlink, trap_item);
err_group_link:
free_percpu(trap_item->stats);
err_stats_alloc:
@@ -8122,7 +8033,6 @@ static void devlink_trap_unregister(struct devlink *devlink,
list_del(&trap_item->list);
if (devlink->ops->trap_fini)
devlink->ops->trap_fini(devlink, trap, trap_item);
- devlink_trap_item_group_unlink(devlink, trap_item);
free_percpu(trap_item->stats);
kfree(trap_item);
}
@@ -8299,7 +8209,6 @@ devlink_trap_group_register(struct devlink *devlink,
}
group_item->group = group;
- refcount_set(&group_item->refcount, 1);
if (devlink->ops->trap_group_init) {
err = devlink->ops->trap_group_init(devlink, group);
--
2.24.1
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