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From: Matthew Wood <thepacketgeek@gmail.com>
To: "David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>,
	Paolo Abeni <pabeni@redhat.com>
Cc: leitao@debian.org,
	netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH net-next v2 2/8] net: netconsole: move netconsole_target config_item to config_group
Date: Fri, 26 Jan 2024 15:13:37 -0800
Message-ID: <20240126231348.281600-3-thepacketgeek@gmail.com>
In-Reply-To: <20240126231348.281600-1-thepacketgeek@gmail.com>
References: <20240126231348.281600-1-thepacketgeek@gmail.com>
Precedence: bulk
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit

In order to support a nested userdata config_group in later patches,
use a config_group for netconsole_target instead of a
config_item. It's a no-op functionality-wise, since
config_group maintains all features of a config_item via the cg_item
member.

Signed-off-by: Matthew Wood <thepacketgeek@gmail.com>
---
 drivers/net/netconsole.c | 61 ++++++++++++++++++++++------------------
 1 file changed, 33 insertions(+), 28 deletions(-)

diff --git a/drivers/net/netconsole.c b/drivers/net/netconsole.c
index 93fc3b509706..085350beca87 100644
--- a/drivers/net/netconsole.c
+++ b/drivers/net/netconsole.c
@@ -79,7 +79,7 @@ static struct console netconsole_ext;
 /**
  * struct netconsole_target - Represents a configured netconsole target.
  * @list:	Links this target into the target_list.
- * @item:	Links us into the configfs subsystem hierarchy.
+ * @group:	Links us into the configfs subsystem hierarchy.
  * @enabled:	On / off knob to enable / disable target.
  *		Visible from userspace (read-write).
  *		We maintain a strict 1:1 correspondence between this and
@@ -102,7 +102,7 @@ static struct console netconsole_ext;
 struct netconsole_target {
 	struct list_head	list;
 #ifdef	CONFIG_NETCONSOLE_DYNAMIC
-	struct config_item	item;
+	struct config_group	group;
 #endif
 	bool			enabled;
 	bool			extended;
@@ -134,14 +134,14 @@ static void __exit dynamic_netconsole_exit(void)
  */
 static void netconsole_target_get(struct netconsole_target *nt)
 {
-	if (config_item_name(&nt->item))
-		config_item_get(&nt->item);
+	if (config_item_name(&nt->group.cg_item))
+		config_group_get(&nt->group);
 }
 
 static void netconsole_target_put(struct netconsole_target *nt)
 {
-	if (config_item_name(&nt->item))
-		config_item_put(&nt->item);
+	if (config_item_name(&nt->group.cg_item))
+		config_group_put(&nt->group);
 }
 
 #else	/* !CONFIG_NETCONSOLE_DYNAMIC */
@@ -221,9 +221,13 @@ static struct netconsole_target *alloc_and_init(void)
 
 static struct netconsole_target *to_target(struct config_item *item)
 {
-	return item ?
-		container_of(item, struct netconsole_target, item) :
-		NULL;
+	struct config_group *cfg_group;
+
+	cfg_group = to_config_group(item);
+	if (!cfg_group)
+		return NULL;
+	return container_of(to_config_group(item),
+			    struct netconsole_target, group);
 }
 
 /*
@@ -370,7 +374,7 @@ static ssize_t release_store(struct config_item *item, const char *buf,
 	mutex_lock(&dynamic_netconsole_mutex);
 	if (nt->enabled) {
 		pr_err("target (%s) is enabled, disable to update parameters\n",
-		       config_item_name(&nt->item));
+		       config_item_name(&nt->group.cg_item));
 		err = -EINVAL;
 		goto out_unlock;
 	}
@@ -398,7 +402,7 @@ static ssize_t extended_store(struct config_item *item, const char *buf,
 	mutex_lock(&dynamic_netconsole_mutex);
 	if (nt->enabled) {
 		pr_err("target (%s) is enabled, disable to update parameters\n",
-		       config_item_name(&nt->item));
+		       config_item_name(&nt->group.cg_item));
 		err = -EINVAL;
 		goto out_unlock;
 	}
@@ -425,7 +429,7 @@ static ssize_t dev_name_store(struct config_item *item, const char *buf,
 	mutex_lock(&dynamic_netconsole_mutex);
 	if (nt->enabled) {
 		pr_err("target (%s) is enabled, disable to update parameters\n",
-		       config_item_name(&nt->item));
+		       config_item_name(&nt->group.cg_item));
 		mutex_unlock(&dynamic_netconsole_mutex);
 		return -EINVAL;
 	}
@@ -450,7 +454,7 @@ static ssize_t local_port_store(struct config_item *item, const char *buf,
 	mutex_lock(&dynamic_netconsole_mutex);
 	if (nt->enabled) {
 		pr_err("target (%s) is enabled, disable to update parameters\n",
-		       config_item_name(&nt->item));
+		       config_item_name(&nt->group.cg_item));
 		goto out_unlock;
 	}
 
@@ -473,7 +477,7 @@ static ssize_t remote_port_store(struct config_item *item,
 	mutex_lock(&dynamic_netconsole_mutex);
 	if (nt->enabled) {
 		pr_err("target (%s) is enabled, disable to update parameters\n",
-		       config_item_name(&nt->item));
+		       config_item_name(&nt->group.cg_item));
 		goto out_unlock;
 	}
 
@@ -495,7 +499,7 @@ static ssize_t local_ip_store(struct config_item *item, const char *buf,
 	mutex_lock(&dynamic_netconsole_mutex);
 	if (nt->enabled) {
 		pr_err("target (%s) is enabled, disable to update parameters\n",
-		       config_item_name(&nt->item));
+		       config_item_name(&nt->group.cg_item));
 		goto out_unlock;
 	}
 
@@ -532,7 +536,7 @@ static ssize_t remote_ip_store(struct config_item *item, const char *buf,
 	mutex_lock(&dynamic_netconsole_mutex);
 	if (nt->enabled) {
 		pr_err("target (%s) is enabled, disable to update parameters\n",
-		       config_item_name(&nt->item));
+		       config_item_name(&nt->group.cg_item));
 		goto out_unlock;
 	}
 
@@ -570,7 +574,7 @@ static ssize_t remote_mac_store(struct config_item *item, const char *buf,
 	mutex_lock(&dynamic_netconsole_mutex);
 	if (nt->enabled) {
 		pr_err("target (%s) is enabled, disable to update parameters\n",
-		       config_item_name(&nt->item));
+		       config_item_name(&nt->group.cg_item));
 		goto out_unlock;
 	}
 
@@ -638,7 +642,7 @@ static struct netconsole_target *find_cmdline_target(const char *name)
 
 	spin_lock_irqsave(&target_list_lock, flags);
 	list_for_each_entry(nt, &target_list, list) {
-		if (!strcmp(nt->item.ci_name, name)) {
+		if (!strcmp(nt->group.cg_item.ci_name, name)) {
 			ret = nt;
 			break;
 		}
@@ -652,8 +656,8 @@ static struct netconsole_target *find_cmdline_target(const char *name)
  * Group operations and type for netconsole_subsys.
  */
 
-static struct config_item *make_netconsole_target(struct config_group *group,
-						  const char *name)
+static struct config_group *make_netconsole_target(struct config_group *group,
+						   const char *name)
 {
 	struct netconsole_target *nt;
 	unsigned long flags;
@@ -665,8 +669,9 @@ static struct config_item *make_netconsole_target(struct config_group *group,
 	if (!strncmp(name, NETCONSOLE_PARAM_TARGET_PREFIX,
 		     strlen(NETCONSOLE_PARAM_TARGET_PREFIX))) {
 		nt = find_cmdline_target(name);
-		if (nt)
-			return &nt->item;
+		if (nt) {
+			return &nt->group;
+		}
 	}
 
 	nt = alloc_and_init();
@@ -674,14 +679,14 @@ static struct config_item *make_netconsole_target(struct config_group *group,
 		return ERR_PTR(-ENOMEM);
 
 	/* Initialize the config_item member */
-	config_item_init_type_name(&nt->item, name, &netconsole_target_type);
+	config_group_init_type_name(&nt->group, name, &netconsole_target_type);
 
 	/* Adding, but it is disabled */
 	spin_lock_irqsave(&target_list_lock, flags);
 	list_add(&nt->list, &target_list);
 	spin_unlock_irqrestore(&target_list_lock, flags);
 
-	return &nt->item;
+	return &nt->group;
 }
 
 static void drop_netconsole_target(struct config_group *group,
@@ -701,11 +706,11 @@ static void drop_netconsole_target(struct config_group *group,
 	if (nt->enabled)
 		netpoll_cleanup(&nt->np);
 
-	config_item_put(&nt->item);
+	config_item_put(&nt->group.cg_item);
 }
 
 static struct configfs_group_operations netconsole_subsys_group_ops = {
-	.make_item	= make_netconsole_target,
+	.make_group	= make_netconsole_target,
 	.drop_item	= drop_netconsole_target,
 };
 
@@ -731,8 +736,8 @@ static void populate_configfs_item(struct netconsole_target *nt,
 
 	snprintf(target_name, sizeof(target_name), "%s%d",
 		 NETCONSOLE_PARAM_TARGET_PREFIX, cmdline_count);
-	config_item_init_type_name(&nt->item, target_name,
-				   &netconsole_target_type);
+	config_group_init_type_name(&nt->group, target_name,
+				    &netconsole_target_type);
 }
 
 #endif	/* CONFIG_NETCONSOLE_DYNAMIC */
-- 
2.43.0