diff options
Diffstat (limited to 'mm/filemap.c')
| -rw-r--r-- | mm/filemap.c | 33 |
1 files changed, 31 insertions, 2 deletions
diff --git a/mm/filemap.c b/mm/filemap.c index bada249b9fb7..57002cb1c7b5 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -3814,6 +3814,18 @@ int generic_file_mmap(struct file *file, struct vm_area_struct *vma) return 0; } +int generic_file_mmap_prepare(struct vm_area_desc *desc) +{ + struct file *file = desc->file; + struct address_space *mapping = file->f_mapping; + + if (!mapping->a_ops->read_folio) + return -ENOEXEC; + file_accessed(file); + desc->vm_ops = &generic_file_vm_ops; + return 0; +} + /* * This is for filesystems which do not implement ->writepage. */ @@ -3823,6 +3835,13 @@ int generic_file_readonly_mmap(struct file *file, struct vm_area_struct *vma) return -EINVAL; return generic_file_mmap(file, vma); } + +int generic_file_readonly_mmap_prepare(struct vm_area_desc *desc) +{ + if (is_shared_maywrite(desc->vm_flags)) + return -EINVAL; + return generic_file_mmap_prepare(desc); +} #else vm_fault_t filemap_page_mkwrite(struct vm_fault *vmf) { @@ -3832,15 +3851,25 @@ int generic_file_mmap(struct file *file, struct vm_area_struct *vma) { return -ENOSYS; } +int generic_file_mmap_prepare(struct vm_area_desc *desc) +{ + return -ENOSYS; +} int generic_file_readonly_mmap(struct file *file, struct vm_area_struct *vma) { return -ENOSYS; } +int generic_file_readonly_mmap_prepare(struct vm_area_desc *desc) +{ + return -ENOSYS; +} #endif /* CONFIG_MMU */ EXPORT_SYMBOL(filemap_page_mkwrite); EXPORT_SYMBOL(generic_file_mmap); +EXPORT_SYMBOL(generic_file_mmap_prepare); EXPORT_SYMBOL(generic_file_readonly_mmap); +EXPORT_SYMBOL(generic_file_readonly_mmap_prepare); static struct folio *do_read_cache_folio(struct address_space *mapping, pgoff_t index, filler_t filler, struct file *file, gfp_t gfp) @@ -4109,7 +4138,7 @@ retry: break; } - status = a_ops->write_begin(file, mapping, pos, bytes, + status = a_ops->write_begin(iocb, mapping, pos, bytes, &folio, &fsdata); if (unlikely(status < 0)) break; @@ -4130,7 +4159,7 @@ retry: copied = copy_folio_from_iter_atomic(folio, offset, bytes, i); flush_dcache_folio(folio); - status = a_ops->write_end(file, mapping, pos, bytes, copied, + status = a_ops->write_end(iocb, mapping, pos, bytes, copied, folio, fsdata); if (unlikely(status != copied)) { iov_iter_revert(i, copied - max(status, 0L)); |