netdevsim: don't embed file_operations into your structs

Just use debugfs_get_aux() instead of debugfs_real_fops().

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Link: https://lore.kernel.org/r/20250112080705.141166-10-viro@zeniv.linux.org.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: Al Viro

drivers/net/netdevsim/hwstats.c

@@ -331,7 +331,6 @@ enum nsim_dev_hwstats_do {
 };
 
 struct nsim_dev_hwstats_fops {
-	const struct file_operations fops;
 	enum nsim_dev_hwstats_do action;
 	enum netdev_offload_xstats_type type;
 };
@@ -342,13 +341,12 @@ nsim_dev_hwstats_do_write(struct file *file,
 			  size_t count, loff_t *ppos)
 {
 	struct nsim_dev_hwstats *hwstats = file->private_data;
-	struct nsim_dev_hwstats_fops *hwsfops;
+	const struct nsim_dev_hwstats_fops *hwsfops;
 	struct list_head *hwsdev_list;
 	int ifindex;
 	int err;
 
-	hwsfops = container_of(debugfs_real_fops(file),
-			       struct nsim_dev_hwstats_fops, fops);
+	hwsfops = debugfs_get_aux(file);
 
 	err = kstrtoint_from_user(data, count, 0, &ifindex);
 	if (err)
@@ -381,14 +379,13 @@ nsim_dev_hwstats_do_write(struct file *file,
 	return count;
 }
 
+static struct debugfs_short_fops debugfs_ops = {
+	.write = nsim_dev_hwstats_do_write,
+	.llseek = generic_file_llseek,
+};
+
 #define NSIM_DEV_HWSTATS_FOPS(ACTION, TYPE)			\
 	{							\
-		.fops = {					\
-			.open = simple_open,			\
-			.write = nsim_dev_hwstats_do_write,	\
-			.llseek = generic_file_llseek,		\
-			.owner = THIS_MODULE,			\
-		},						\
 		.action = ACTION,				\
 		.type = TYPE,					\
 	}
@@ -433,12 +430,12 @@ int nsim_dev_hwstats_init(struct nsim_dev *nsim_dev)
 		goto err_remove_hwstats_recursive;
 	}
 
-	debugfs_create_file("enable_ifindex", 0200, hwstats->l3_ddir, hwstats,
-			    &nsim_dev_hwstats_l3_enable_fops.fops);
-	debugfs_create_file("disable_ifindex", 0200, hwstats->l3_ddir, hwstats,
-			    &nsim_dev_hwstats_l3_disable_fops.fops);
-	debugfs_create_file("fail_next_enable", 0200, hwstats->l3_ddir, hwstats,
-			    &nsim_dev_hwstats_l3_fail_fops.fops);
+	debugfs_create_file_aux("enable_ifindex", 0200, hwstats->l3_ddir, hwstats,
+			    &nsim_dev_hwstats_l3_enable_fops, &debugfs_ops);
+	debugfs_create_file_aux("disable_ifindex", 0200, hwstats->l3_ddir, hwstats,
+			    &nsim_dev_hwstats_l3_disable_fops, &debugfs_ops);
+	debugfs_create_file_aux("fail_next_enable", 0200, hwstats->l3_ddir, hwstats,
+			    &nsim_dev_hwstats_l3_fail_fops, &debugfs_ops);
 
 	INIT_DELAYED_WORK(&hwstats->traffic_dw,
 			  &nsim_dev_hwstats_traffic_work);