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2023-12-08 01573e231f18eb2d99162747186f59511f56b64d

 kernel/include/linux/fdtable.h
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@@ -22,6 +22,7 @@
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  * as this is the granularity returned by copy_fdset().
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  */
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 #define NR_OPEN_DEFAULT BITS_PER_LONG
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+#define NR_OPEN_MAX ~0U
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 struct fdtable {
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 	unsigned int max_fds;
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@@ -109,7 +110,7 @@
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 void put_files_struct(struct files_struct *fs);
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 void reset_files_struct(struct files_struct *);
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 int unshare_files(struct files_struct **);
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-struct files_struct *dup_fd(struct files_struct *, int *) __latent_entropy;
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+struct files_struct *dup_fd(struct files_struct *, unsigned, int *) __latent_entropy;
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 void do_close_on_exec(struct files_struct *);
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 int iterate_fd(struct files_struct *, unsigned,
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 		int (*)(const void *, struct file *, unsigned),
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@@ -121,6 +122,10 @@
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 		      unsigned int fd, struct file *file);
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 extern int __close_fd(struct files_struct *files,
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 		      unsigned int fd);
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+extern int __close_range(unsigned int fd, unsigned int max_fd, unsigned int flags);
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+extern int close_fd_get_file(unsigned int fd, struct file **res);
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+extern int unshare_fd(unsigned long unshare_flags, unsigned int max_fds,
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+		      struct files_struct **new_fdp);
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 extern struct kmem_cache *files_cachep;
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