diff options
Diffstat (limited to 'include/linux/memfd.h')
| -rw-r--r-- | include/linux/memfd.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/memfd.h b/include/linux/memfd.h index 3f2cf339ceaf..246daadbfde8 100644 --- a/include/linux/memfd.h +++ b/include/linux/memfd.h @@ -7,6 +7,14 @@ #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) { @@ -16,6 +24,11 @@ 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 */ |