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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __LINUX_MEMFD_H
#define __LINUX_MEMFD_H
#include <linux/file.h>
#ifdef CONFIG_MEMFD_CREATE
extern long memfd_fcntl(struct file *file, unsigned int cmd, unsigned int arg);
struct folio *memfd_alloc_folio(struct file *memfd, pgoff_t idx);
/*
* Check for any existing seals on mmap, return an error if access is denied due
* to sealing, or 0 otherwise.
*
* We also update VMA flags if appropriate by manipulating the VMA flags pointed
* to by vm_flags_ptr.
*/
int memfd_check_seals_mmap(struct file *file, unsigned long *vm_flags_ptr);
#else
static inline long memfd_fcntl(struct file *f, unsigned int c, unsigned int a)
{
return -EINVAL;
}
static inline struct folio *memfd_alloc_folio(struct file *memfd, pgoff_t idx)
{
return ERR_PTR(-EINVAL);
}
static inline int memfd_check_seals_mmap(struct file *file,
unsigned long *vm_flags_ptr)
{
return 0;
}
#endif
#endif /* __LINUX_MEMFD_H */
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