.direct_IO = udf_adinicb_direct_IO,
};
+static vm_fault_t udf_page_mkwrite(struct vm_fault *vmf)
+{
+ struct vm_area_struct *vma = vmf->vma;
+ struct inode *inode = file_inode(vma->vm_file);
+ struct address_space *mapping = inode->i_mapping;
+ struct page *page = vmf->page;
+ loff_t size;
+ unsigned int end;
+ vm_fault_t ret = VM_FAULT_LOCKED;
+ int err;
+
+ sb_start_pagefault(inode->i_sb);
+ file_update_time(vma->vm_file);
+ filemap_invalidate_lock_shared(mapping);
+ lock_page(page);
+ size = i_size_read(inode);
+ if (page->mapping != inode->i_mapping || page_offset(page) >= size) {
+ unlock_page(page);
+ ret = VM_FAULT_NOPAGE;
+ goto out_unlock;
+ }
+ /* Space is already allocated for in-ICB file */
+ if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
+ goto out_dirty;
+ if (page->index == size >> PAGE_SHIFT)
+ end = size & ~PAGE_MASK;
+ else
+ end = PAGE_SIZE;
+ err = __block_write_begin(page, 0, end, udf_get_block);
+ if (!err)
+ err = block_commit_write(page, 0, end);
+ if (err < 0) {
+ unlock_page(page);
+ ret = block_page_mkwrite_return(err);
+ goto out_unlock;
+ }
+out_dirty:
+ set_page_dirty(page);
+ wait_for_stable_page(page);
+out_unlock:
+ filemap_invalidate_unlock_shared(mapping);
+ sb_end_pagefault(inode->i_sb);
+ return ret;
+}
+
+static const struct vm_operations_struct udf_file_vm_ops = {
+ .fault = filemap_fault,
+ .map_pages = filemap_map_pages,
+ .page_mkwrite = udf_page_mkwrite,
+};
+
static ssize_t udf_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
{
ssize_t retval;
return 0;
}
+static int udf_file_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ file_accessed(file);
+ vma->vm_ops = &udf_file_vm_ops;
+
+ return 0;
+}
+
const struct file_operations udf_file_operations = {
.read_iter = generic_file_read_iter,
.unlocked_ioctl = udf_ioctl,
.open = generic_file_open,
- .mmap = generic_file_mmap,
+ .mmap = udf_file_mmap,
.write_iter = udf_file_write_iter,
.release = udf_release_file,
.fsync = generic_file_fsync,
static void udf_merge_extents(struct inode *, struct kernel_long_ad *, int *);
static int udf_update_extents(struct inode *, struct kernel_long_ad *, int,
int, struct extent_position *);
-static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int);
static void __udf_clear_extent_cache(struct inode *inode)
{
extern int udf_write_inode(struct inode *, struct writeback_control *wbc);
extern int8_t inode_bmap(struct inode *, sector_t, struct extent_position *,
struct kernel_lb_addr *, uint32_t *, sector_t *);
+int udf_get_block(struct inode *, sector_t, struct buffer_head *, int);
extern int udf_setup_indirect_aext(struct inode *inode, udf_pblk_t block,
struct extent_position *epos);
extern int __udf_add_aext(struct inode *inode, struct extent_position *epos,