diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/fs.h | 9 | ||||
| -rw-r--r-- | include/linux/mm.h | 17 |
2 files changed, 25 insertions, 1 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index a2628a12bd2b..c390f5c667e3 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2059,13 +2059,20 @@ static inline bool can_mmap_file(struct file *file) } int compat_vma_mmap(struct file *file, struct vm_area_struct *vma); +int __vma_check_mmap_hook(struct vm_area_struct *vma); static inline int vfs_mmap(struct file *file, struct vm_area_struct *vma) { + int err; + if (file->f_op->mmap_prepare) return compat_vma_mmap(file, vma); - return file->f_op->mmap(file, vma); + err = file->f_op->mmap(file, vma); + if (err) + return err; + + return __vma_check_mmap_hook(vma); } static inline int vfs_mmap_prepare(struct file *file, struct vm_area_desc *desc) diff --git a/include/linux/mm.h b/include/linux/mm.h index 21a2eef5f8fe..81fbcfed44dd 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -775,6 +775,23 @@ struct vm_operations_struct { * Context: User context. May sleep. Caller holds mmap_lock. */ void (*close)(struct vm_area_struct *vma); + /** + * @mapped: Called when the VMA is first mapped in the MM. Not called if + * the new VMA is merged with an adjacent VMA. + * + * The @vm_private_data field is an output field allowing the user to + * modify vma->vm_private_data as necessary. + * + * ONLY valid if set from f_op->mmap_prepare. Will result in an error if + * set from f_op->mmap. + * + * Returns %0 on success, or an error otherwise. On error, the VMA will + * be unmapped. + * + * Context: User context. May sleep. Caller holds mmap_lock. + */ + int (*mapped)(unsigned long start, unsigned long end, pgoff_t pgoff, + const struct file *file, void **vm_private_data); /* Called any time before splitting to check if it's allowed */ int (*may_split)(struct vm_area_struct *vma, unsigned long addr); int (*mremap)(struct vm_area_struct *vma); |