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Date: Sat, 7 Jan 2023 11:11:43 +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, michael.chan@...adcom.com,
yisen.zhuang@...wei.com, salil.mehta@...wei.com,
jesse.brandeburg@...el.com, anthony.l.nguyen@...el.com,
tariqt@...dia.com, saeedm@...dia.com, leon@...nel.org,
idosch@...dia.com, petrm@...dia.com, mailhol.vincent@...adoo.fr,
jacob.e.keller@...el.com, gal@...dia.com
Subject: [patch net-next v2 2/9] devlink: remove linecards lock
From: Jiri Pirko <jiri@...dia.com>
Similar to other devlink objects, convert the linecards list to be
protected by devlink instance lock. Alongside with that rename the
create/destroy() functions to devl_* to indicated the devlink instance
lock needs to be held while calling them.
Signed-off-by: Jiri Pirko <jiri@...dia.com>
---
.../ethernet/mellanox/mlxsw/core_linecards.c | 8 ++--
include/net/devlink.h | 6 +--
net/devlink/core.c | 2 -
net/devlink/devl_internal.h | 1 -
net/devlink/leftover.c | 41 +++++++------------
5 files changed, 21 insertions(+), 37 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlxsw/core_linecards.c b/drivers/net/ethernet/mellanox/mlxsw/core_linecards.c
index 83d2dc91ba2c..025e0db983fe 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core_linecards.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core_linecards.c
@@ -1259,9 +1259,9 @@ static int mlxsw_linecard_init(struct mlxsw_core *mlxsw_core,
linecard->linecards = linecards;
mutex_init(&linecard->lock);
- devlink_linecard = devlink_linecard_create(priv_to_devlink(mlxsw_core),
- slot_index, &mlxsw_linecard_ops,
- linecard);
+ devlink_linecard = devl_linecard_create(priv_to_devlink(mlxsw_core),
+ slot_index, &mlxsw_linecard_ops,
+ linecard);
if (IS_ERR(devlink_linecard))
return PTR_ERR(devlink_linecard);
@@ -1285,7 +1285,7 @@ static void mlxsw_linecard_fini(struct mlxsw_core *mlxsw_core,
if (linecard->active)
mlxsw_linecard_active_clear(linecard);
mlxsw_linecard_bdev_del(linecard);
- devlink_linecard_destroy(linecard->devlink_linecard);
+ devl_linecard_destroy(linecard->devlink_linecard);
mutex_destroy(&linecard->lock);
}
diff --git a/include/net/devlink.h b/include/net/devlink.h
index 425ecef431b7..d7c9572e5bea 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -1687,9 +1687,9 @@ void devl_rate_nodes_destroy(struct devlink *devlink);
void devlink_port_linecard_set(struct devlink_port *devlink_port,
struct devlink_linecard *linecard);
struct devlink_linecard *
-devlink_linecard_create(struct devlink *devlink, unsigned int linecard_index,
- const struct devlink_linecard_ops *ops, void *priv);
-void devlink_linecard_destroy(struct devlink_linecard *linecard);
+devl_linecard_create(struct devlink *devlink, unsigned int linecard_index,
+ const struct devlink_linecard_ops *ops, void *priv);
+void devl_linecard_destroy(struct devlink_linecard *linecard);
void devlink_linecard_provision_set(struct devlink_linecard *linecard,
const char *type);
void devlink_linecard_provision_clear(struct devlink_linecard *linecard);
diff --git a/net/devlink/core.c b/net/devlink/core.c
index 4014a01c8f3d..d223a46fe557 100644
--- a/net/devlink/core.c
+++ b/net/devlink/core.c
@@ -218,7 +218,6 @@ struct devlink *devlink_alloc_ns(const struct devlink_ops *ops,
mutex_init(&devlink->lock);
lockdep_set_class(&devlink->lock, &devlink->lock_key);
mutex_init(&devlink->reporters_lock);
- mutex_init(&devlink->linecards_lock);
refcount_set(&devlink->refcount, 1);
return devlink;
@@ -240,7 +239,6 @@ void devlink_free(struct devlink *devlink)
{
ASSERT_DEVLINK_NOT_REGISTERED(devlink);
- mutex_destroy(&devlink->linecards_lock);
mutex_destroy(&devlink->reporters_lock);
mutex_destroy(&devlink->lock);
lockdep_unregister_key(&devlink->lock_key);
diff --git a/net/devlink/devl_internal.h b/net/devlink/devl_internal.h
index 82268c4579a3..ca49ad31027c 100644
--- a/net/devlink/devl_internal.h
+++ b/net/devlink/devl_internal.h
@@ -37,7 +37,6 @@ struct devlink {
struct list_head trap_group_list;
struct list_head trap_policer_list;
struct list_head linecard_list;
- struct mutex linecards_lock; /* protects linecard_list */
const struct devlink_ops *ops;
struct xarray snapshot_ids;
struct devlink_dev_stats stats;
diff --git a/net/devlink/leftover.c b/net/devlink/leftover.c
index 478b81b85f03..4b01b15f8659 100644
--- a/net/devlink/leftover.c
+++ b/net/devlink/leftover.c
@@ -282,13 +282,10 @@ devlink_linecard_get_from_attrs(struct devlink *devlink, struct nlattr **attrs)
u32 linecard_index = nla_get_u32(attrs[DEVLINK_ATTR_LINECARD_INDEX]);
struct devlink_linecard *linecard;
- mutex_lock(&devlink->linecards_lock);
linecard = devlink_linecard_get_by_index(devlink, linecard_index);
- if (linecard)
- refcount_inc(&linecard->refcount);
- mutex_unlock(&devlink->linecards_lock);
if (!linecard)
return ERR_PTR(-ENODEV);
+ refcount_inc(&linecard->refcount);
return linecard;
}
return ERR_PTR(-EINVAL);
@@ -2129,7 +2126,7 @@ static int devlink_nl_cmd_linecard_get_dumpit(struct sk_buff *msg,
devlink_dump_for_each_instance_get(msg, state, devlink) {
int idx = 0;
- mutex_lock(&devlink->linecards_lock);
+ devl_lock(devlink);
if (!devl_is_registered(devlink))
goto next_devlink;
@@ -2147,7 +2144,7 @@ static int devlink_nl_cmd_linecard_get_dumpit(struct sk_buff *msg,
cb->extack);
mutex_unlock(&linecard->state_lock);
if (err) {
- mutex_unlock(&devlink->linecards_lock);
+ devl_unlock(devlink);
devlink_put(devlink);
state->idx = idx;
goto out;
@@ -2155,7 +2152,7 @@ static int devlink_nl_cmd_linecard_get_dumpit(struct sk_buff *msg,
idx++;
}
next_devlink:
- mutex_unlock(&devlink->linecards_lock);
+ devl_unlock(devlink);
devlink_put(devlink);
}
out:
@@ -10225,7 +10222,7 @@ static void devlink_linecard_types_fini(struct devlink_linecard *linecard)
}
/**
- * devlink_linecard_create - Create devlink linecard
+ * devl_linecard_create - Create devlink linecard
*
* @devlink: devlink
* @linecard_index: driver-specific numerical identifier of the linecard
@@ -10238,8 +10235,8 @@ static void devlink_linecard_types_fini(struct devlink_linecard *linecard)
* Return: Line card structure or an ERR_PTR() encoded error code.
*/
struct devlink_linecard *
-devlink_linecard_create(struct devlink *devlink, unsigned int linecard_index,
- const struct devlink_linecard_ops *ops, void *priv)
+devl_linecard_create(struct devlink *devlink, unsigned int linecard_index,
+ const struct devlink_linecard_ops *ops, void *priv)
{
struct devlink_linecard *linecard;
int err;
@@ -10248,17 +10245,13 @@ devlink_linecard_create(struct devlink *devlink, unsigned int linecard_index,
!ops->types_count || !ops->types_get))
return ERR_PTR(-EINVAL);
- mutex_lock(&devlink->linecards_lock);
- if (devlink_linecard_index_exists(devlink, linecard_index)) {
- mutex_unlock(&devlink->linecards_lock);
+ if (devlink_linecard_index_exists(devlink, linecard_index))
return ERR_PTR(-EEXIST);
- }
+
linecard = kzalloc(sizeof(*linecard), GFP_KERNEL);
- if (!linecard) {
- mutex_unlock(&devlink->linecards_lock);
+ if (!linecard)
return ERR_PTR(-ENOMEM);
- }
linecard->devlink = devlink;
linecard->index = linecard_index;
@@ -10271,35 +10264,29 @@ devlink_linecard_create(struct devlink *devlink, unsigned int linecard_index,
if (err) {
mutex_destroy(&linecard->state_lock);
kfree(linecard);
- mutex_unlock(&devlink->linecards_lock);
return ERR_PTR(err);
}
list_add_tail(&linecard->list, &devlink->linecard_list);
refcount_set(&linecard->refcount, 1);
- mutex_unlock(&devlink->linecards_lock);
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
return linecard;
}
-EXPORT_SYMBOL_GPL(devlink_linecard_create);
+EXPORT_SYMBOL_GPL(devl_linecard_create);
/**
- * devlink_linecard_destroy - Destroy devlink linecard
+ * devl_linecard_destroy - Destroy devlink linecard
*
* @linecard: devlink linecard
*/
-void devlink_linecard_destroy(struct devlink_linecard *linecard)
+void devl_linecard_destroy(struct devlink_linecard *linecard)
{
- struct devlink *devlink = linecard->devlink;
-
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_DEL);
- mutex_lock(&devlink->linecards_lock);
list_del(&linecard->list);
devlink_linecard_types_fini(linecard);
- mutex_unlock(&devlink->linecards_lock);
devlink_linecard_put(linecard);
}
-EXPORT_SYMBOL_GPL(devlink_linecard_destroy);
+EXPORT_SYMBOL_GPL(devl_linecard_destroy);
/**
* devlink_linecard_provision_set - Set provisioning on linecard
--
2.39.0
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