change wifi driver to cypress

hc

2024-01-05 071106ecf68c401173c58808b1cf5f68cc50d390

 kernel/fs/sysfs/mount.c
..
..
@@ -6,41 +6,77 @@
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  * Copyright (c) 2007 SUSE Linux Products GmbH
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  * Copyright (c) 2007 Tejun Heo <teheo@suse.de>
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  *
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- * Please see Documentation/filesystems/sysfs.txt for more information.
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+ * Please see Documentation/filesystems/sysfs.rst for more information.
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  */
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 #include <linux/fs.h>
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 #include <linux/magic.h>
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 #include <linux/mount.h>
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 #include <linux/init.h>
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+#include <linux/slab.h>
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 #include <linux/user_namespace.h>
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+#include <linux/fs_context.h>
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+#include <net/net_namespace.h>
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 #include "sysfs.h"
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 static struct kernfs_root *sysfs_root;
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 struct kernfs_node *sysfs_root_kn;
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-static struct dentry *sysfs_mount(struct file_system_type *fs_type,
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-	int flags, const char *dev_name, void *data)
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+static int sysfs_get_tree(struct fs_context *fc)
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 {
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-	struct dentry *root;
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-	void *ns;
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-	bool new_sb = false;
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+	struct kernfs_fs_context *kfc = fc->fs_private;
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+	int ret;
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-	if (!(flags & SB_KERNMOUNT)) {
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+	ret = kernfs_get_tree(fc);
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+	if (ret)
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+		return ret;
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+
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+	if (kfc->new_sb_created)
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+		fc->root->d_sb->s_iflags |= SB_I_USERNS_VISIBLE;
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+	return 0;
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+}
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+
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+static void sysfs_fs_context_free(struct fs_context *fc)
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+{
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+	struct kernfs_fs_context *kfc = fc->fs_private;
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+
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+	if (kfc->ns_tag)
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+		kobj_ns_drop(KOBJ_NS_TYPE_NET, kfc->ns_tag);
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+	kernfs_free_fs_context(fc);
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+	kfree(kfc);
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+}
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+
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+static const struct fs_context_operations sysfs_fs_context_ops = {
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+	.free		= sysfs_fs_context_free,
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+	.get_tree	= sysfs_get_tree,
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+};
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+
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+static int sysfs_init_fs_context(struct fs_context *fc)
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+{
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+	struct kernfs_fs_context *kfc;
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+	struct net *netns;
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+
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+	if (!(fc->sb_flags & SB_KERNMOUNT)) {
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 		if (!kobj_ns_current_may_mount(KOBJ_NS_TYPE_NET))
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-			return ERR_PTR(-EPERM);
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+			return -EPERM;
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 	}
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-	ns = kobj_ns_grab_current(KOBJ_NS_TYPE_NET);
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-	root = kernfs_mount_ns(fs_type, flags, sysfs_root,
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-				SYSFS_MAGIC, &new_sb, ns);
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-	if (!new_sb)
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-		kobj_ns_drop(KOBJ_NS_TYPE_NET, ns);
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-	else if (!IS_ERR(root))
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-		root->d_sb->s_iflags |= SB_I_USERNS_VISIBLE;
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+	kfc = kzalloc(sizeof(struct kernfs_fs_context), GFP_KERNEL);
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+	if (!kfc)
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+		return -ENOMEM;
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-	return root;
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+	kfc->ns_tag = netns = kobj_ns_grab_current(KOBJ_NS_TYPE_NET);
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+	kfc->root = sysfs_root;
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+	kfc->magic = SYSFS_MAGIC;
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+	fc->fs_private = kfc;
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+	fc->ops = &sysfs_fs_context_ops;
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+	if (netns) {
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+		put_user_ns(fc->user_ns);
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+		fc->user_ns = get_user_ns(netns->user_ns);
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+	}
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+	fc->global = true;
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+	return 0;
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 }
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 static void sysfs_kill_sb(struct super_block *sb)
..
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@@ -52,10 +88,10 @@
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 }
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 static struct file_system_type sysfs_fs_type = {
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-	.name		= "sysfs",
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-	.mount		= sysfs_mount,
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-	.kill_sb	= sysfs_kill_sb,
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-	.fs_flags	= FS_USERNS_MOUNT,
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+	.name			= "sysfs",
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+	.init_fs_context	= sysfs_init_fs_context,
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+	.kill_sb		= sysfs_kill_sb,
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+	.fs_flags		= FS_USERNS_MOUNT,
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 };
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 int __init sysfs_init(void)