Linux kernel mirror (for testing)
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __LINUX_MEMFD_H
3#define __LINUX_MEMFD_H
4
5#include <linux/file.h>
6
7#ifdef CONFIG_MEMFD_CREATE
8extern long memfd_fcntl(struct file *file, unsigned int cmd, unsigned int arg);
9struct folio *memfd_alloc_folio(struct file *memfd, pgoff_t idx);
10/*
11 * Check for any existing seals on mmap, return an error if access is denied due
12 * to sealing, or 0 otherwise.
13 *
14 * We also update VMA flags if appropriate by manipulating the VMA flags pointed
15 * to by vm_flags_ptr.
16 */
17int memfd_check_seals_mmap(struct file *file, vm_flags_t *vm_flags_ptr);
18#else
19static inline long memfd_fcntl(struct file *f, unsigned int c, unsigned int a)
20{
21 return -EINVAL;
22}
23static inline struct folio *memfd_alloc_folio(struct file *memfd, pgoff_t idx)
24{
25 return ERR_PTR(-EINVAL);
26}
27static inline int memfd_check_seals_mmap(struct file *file,
28 vm_flags_t *vm_flags_ptr)
29{
30 return 0;
31}
32#endif
33
34#endif /* __LINUX_MEMFD_H */