| /* 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); |
| unsigned int *memfd_file_seals_ptr(struct file *file); |
| #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 unsigned int *memfd_file_seals_ptr(struct file *file) |
| { |
| return NULL; |
| } |
| #endif |
| |
| /* Retrieve memfd seals associated with the file, if any. */ |
| static inline unsigned int memfd_file_seals(struct file *file) |
| { |
| unsigned int *sealsp = memfd_file_seals_ptr(file); |
| |
| return sealsp ? *sealsp : 0; |
| } |
| |
| #endif /* __LINUX_MEMFD_H */ |
