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2023-12-08 01573e231f18eb2d99162747186f59511f56b64d

 kernel/include/linux/seq_file.h
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@@ -21,7 +21,6 @@
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 	size_t pad_until;
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 	loff_t index;
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 	loff_t read_pos;
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-	u64 version;
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 	struct mutex lock;
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 	const struct seq_operations *op;
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 	int poll_event;
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@@ -108,6 +107,7 @@
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 char *mangle_path(char *s, const char *p, const char *esc);
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 int seq_open(struct file *, const struct seq_operations *);
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 ssize_t seq_read(struct file *, char __user *, size_t, loff_t *);
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+ssize_t seq_read_iter(struct kiocb *iocb, struct iov_iter *iter);
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 loff_t seq_lseek(struct file *, loff_t, int);
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 int seq_release(struct inode *, struct file *);
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 int seq_write(struct seq_file *seq, const void *data, size_t len);
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@@ -127,6 +127,7 @@
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 		    unsigned long long v, unsigned int width);
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 void seq_escape(struct seq_file *m, const char *s, const char *esc);
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+void seq_escape_mem_ascii(struct seq_file *m, const char *src, size_t isz);
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 void seq_hex_dump(struct seq_file *m, const char *prefix_str, int prefix_type,
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 		  int rowsize, int groupsize, const void *buf, size_t len,
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@@ -145,6 +146,25 @@
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 int seq_open_private(struct file *, const struct seq_operations *, int);
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 int seq_release_private(struct inode *, struct file *);
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+#define DEFINE_SEQ_ATTRIBUTE(__name)					\
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+static int __name ## _open(struct inode *inode, struct file *file)	\
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+{									\
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+	int ret = seq_open(file, &__name ## _sops);			\
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+	if (!ret && inode->i_private) {					\
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+		struct seq_file *seq_f = file->private_data;		\
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+		seq_f->private = inode->i_private;			\
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+	}								\
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+	return ret;							\
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+}									\
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+									\
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+static const struct file_operations __name ## _fops = {			\
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+	.owner		= THIS_MODULE,					\
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+	.open		= __name ## _open,				\
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+	.read		= seq_read,					\
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+	.llseek		= seq_lseek,					\
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+	.release	= seq_release,					\
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+}
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+
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 #define DEFINE_SHOW_ATTRIBUTE(__name)					\
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 static int __name ## _open(struct inode *inode, struct file *file)	\
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 {									\
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@@ -159,6 +179,19 @@
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 	.release	= single_release,				\
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 }
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+#define DEFINE_PROC_SHOW_ATTRIBUTE(__name)				\
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+static int __name ## _open(struct inode *inode, struct file *file)	\
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+{									\
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+	return single_open(file, __name ## _show, PDE_DATA(inode));	\
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+}									\
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+									\
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+static const struct proc_ops __name ## _proc_ops = {			\
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+	.proc_open	= __name ## _open,				\
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+	.proc_read	= seq_read,					\
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+	.proc_lseek	= seq_lseek,					\
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+	.proc_release	= single_release,				\
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+}
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+
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 static inline struct user_namespace *seq_user_ns(struct seq_file *seq)
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 {
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 #ifdef CONFIG_USER_NS