| 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 |
|---|
| 8 | extern long memfd_fcntl(struct file *file, unsigned int cmd, unsigned int arg); |
|---|
| 9 | struct 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 | */ |
|---|
| 17 | int memfd_check_seals_mmap(struct file *file, unsigned long *vm_flags_ptr); |
|---|
| 18 | #else |
|---|
| 19 | static inline long memfd_fcntl(struct file *f, unsigned int c, unsigned int a) |
|---|
| 20 | { |
|---|
| 21 | return -EINVAL; |
|---|
| 22 | } |
|---|
| 23 | static inline struct folio *memfd_alloc_folio(struct file *memfd, pgoff_t idx) |
|---|
| 24 | { |
|---|
| 25 | return ERR_PTR(-EINVAL); |
|---|
| 26 | } |
|---|
| 27 | static inline int memfd_check_seals_mmap(struct file *file, |
|---|
| 28 | unsigned long *vm_flags_ptr) |
|---|
| 29 | { |
|---|
| 30 | return 0; |
|---|
| 31 | } |
|---|
| 32 | #endif |
|---|
| 33 | |
|---|
| 34 | #endif /* __LINUX_MEMFD_H */ |
|---|
| 35 | |
|---|
