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