317 static int nfs_want_read_modify_write(struct file *file, struct page *page,  in nfs_want_read_modify_write()  argument
320 	unsigned int pglen = nfs_page_length(page);  in nfs_want_read_modify_write()
325 		if (!PageUptodate(page))  in nfs_want_read_modify_write()
331 	    !PageUptodate(page) &&		/* Uptodate? */  in nfs_want_read_modify_write()
332 	    !PagePrivate(page) &&		/* i/o request already? */  in nfs_want_read_modify_write()
349 			struct page **pagep, void **fsdata)  in nfs_write_begin()
353 	struct page *page;  in nfs_write_begin()  local
373 	page = grab_cache_page_write_begin(mapping, index, flags);  in nfs_write_begin()
374 	if (!page)  in nfs_write_begin()
376 	*pagep = page;  in nfs_write_begin()
378 	ret = nfs_flush_incompatible(file, page);  in nfs_write_begin()
380 		unlock_page(page);  in nfs_write_begin()
381 		page_cache_release(page);  in nfs_write_begin()
383 		   nfs_want_read_modify_write(file, page, pos, len)) {  in nfs_write_begin()
385 		ret = nfs_readpage(file, page);  in nfs_write_begin()
386 		page_cache_release(page);  in nfs_write_begin()
395 			struct page *page, void *fsdata)  in nfs_write_end()  argument
408 	if (!PageUptodate(page)) {  in nfs_write_end()
409 		unsigned pglen = nfs_page_length(page);  in nfs_write_end()
413 			zero_user_segments(page, 0, offset,  in nfs_write_end()
415 			SetPageUptodate(page);  in nfs_write_end()
417 			zero_user_segment(page, end, PAGE_CACHE_SIZE);  in nfs_write_end()
419 				SetPageUptodate(page);  in nfs_write_end()
421 			zero_user_segment(page, pglen, PAGE_CACHE_SIZE);  in nfs_write_end()
424 	status = nfs_updatepage(file, page, offset, copied);  in nfs_write_end()
426 	unlock_page(page);  in nfs_write_end()
427 	page_cache_release(page);  in nfs_write_end()
449 static void nfs_invalidate_page(struct page *page, unsigned int offset,  in nfs_invalidate_page()  argument
453 		 page, offset, length);  in nfs_invalidate_page()
458 	nfs_wb_page_cancel(page_file_mapping(page)->host, page);  in nfs_invalidate_page()
460 	nfs_fscache_invalidate_page(page, page->mapping->host);  in nfs_invalidate_page()
469 static int nfs_release_page(struct page *page, gfp_t gfp)  in nfs_release_page()  argument
471 	struct address_space *mapping = page->mapping;  in nfs_release_page()
473 	dfprintk(PAGECACHE, "NFS: release_page(%p)\n", page);  in nfs_release_page()
489 			wait_on_page_bit_killable_timeout(page, PG_private,  in nfs_release_page()
491 			if (PagePrivate(page))  in nfs_release_page()
497 	if (PagePrivate(page))  in nfs_release_page()
499 	return nfs_fscache_release_page(page, gfp);  in nfs_release_page()
502 static void nfs_check_dirty_writeback(struct page *page,  in nfs_check_dirty_writeback()  argument
506 	struct address_space *mapping = page_file_mapping(page);  in nfs_check_dirty_writeback()
508 	if (!mapping || PageSwapCache(page))  in nfs_check_dirty_writeback()
527 	if (PagePrivate(page))  in nfs_check_dirty_writeback()
539 static int nfs_launder_page(struct page *page)  in nfs_launder_page()  argument
541 	struct inode *inode = page_file_mapping(page)->host;  in nfs_launder_page()
545 		inode->i_ino, (long long)page_offset(page));  in nfs_launder_page()
547 	nfs_fscache_wait_on_page_write(nfsi, page);  in nfs_launder_page()
548 	return nfs_wb_page(inode, page);  in nfs_launder_page()
594 	struct page *page = vmf->page;  in nfs_vm_page_mkwrite()  local
603 		(long long)page_offset(page));  in nfs_vm_page_mkwrite()
606 	nfs_fscache_wait_on_page_write(NFS_I(inode), page);  in nfs_vm_page_mkwrite()
611 	lock_page(page);  in nfs_vm_page_mkwrite()
612 	mapping = page_file_mapping(page);  in nfs_vm_page_mkwrite()
616 	wait_on_page_writeback(page);  in nfs_vm_page_mkwrite()
618 	pagelen = nfs_page_length(page);  in nfs_vm_page_mkwrite()
623 	if (nfs_flush_incompatible(filp, page) == 0 &&  in nfs_vm_page_mkwrite()
624 	    nfs_updatepage(filp, page, 0, pagelen) == 0)  in nfs_vm_page_mkwrite()
629 	unlock_page(page);  in nfs_vm_page_mkwrite()