34 static inline void __clear_shadow_entry(struct address_space *mapping,  in __clear_shadow_entry()  argument
37 	XA_STATE(xas, &mapping->i_pages, index);  in __clear_shadow_entry()
43 	mapping->nrexceptional--;  in __clear_shadow_entry()
46 static void clear_shadow_entry(struct address_space *mapping, pgoff_t index,  in clear_shadow_entry()  argument
49 	xa_lock_irq(&mapping->i_pages);  in clear_shadow_entry()
50 	__clear_shadow_entry(mapping, index, entry);  in clear_shadow_entry()
51 	xa_unlock_irq(&mapping->i_pages);  in clear_shadow_entry()
59 static void truncate_exceptional_pvec_entries(struct address_space *mapping,  in truncate_exceptional_pvec_entries()  argument
67 	if (shmem_mapping(mapping))  in truncate_exceptional_pvec_entries()
77 	dax = dax_mapping(mapping);  in truncate_exceptional_pvec_entries()
80 		xa_lock_irq(&mapping->i_pages);  in truncate_exceptional_pvec_entries()
95 			dax_delete_mapping_entry(mapping, index);  in truncate_exceptional_pvec_entries()
99 		__clear_shadow_entry(mapping, index, page);  in truncate_exceptional_pvec_entries()
103 		xa_unlock_irq(&mapping->i_pages);  in truncate_exceptional_pvec_entries()
111 static int invalidate_exceptional_entry(struct address_space *mapping,  in invalidate_exceptional_entry()  argument
115 	if (shmem_mapping(mapping) || dax_mapping(mapping))  in invalidate_exceptional_entry()
117 	clear_shadow_entry(mapping, index, entry);  in invalidate_exceptional_entry()
125 static int invalidate_exceptional_entry2(struct address_space *mapping,  in invalidate_exceptional_entry2()  argument
129 	if (shmem_mapping(mapping))  in invalidate_exceptional_entry2()
131 	if (dax_mapping(mapping))  in invalidate_exceptional_entry2()
132 		return dax_invalidate_mapping_entry_sync(mapping, index);  in invalidate_exceptional_entry2()
133 	clear_shadow_entry(mapping, index, entry);  in invalidate_exceptional_entry2()
157 	invalidatepage = page->mapping->a_ops->invalidatepage;  in do_invalidatepage()
171  * We need to bail out if page->mapping is no longer equal to the original
172  * mapping.  This happens a) when the VM reclaimed the page while we waited on
177 truncate_cleanup_page(struct address_space *mapping, struct page *page)  in truncate_cleanup_page()  argument
181 		unmap_mapping_pages(mapping, page->index, nr, false);  in truncate_cleanup_page()
205 invalidate_complete_page(struct address_space *mapping, struct page *page)  in invalidate_complete_page()  argument
209 	if (page->mapping != mapping)  in invalidate_complete_page()
215 	ret = remove_mapping(mapping, page);  in invalidate_complete_page()
220 int truncate_inode_page(struct address_space *mapping, struct page *page)  in truncate_inode_page()  argument
224 	if (page->mapping != mapping)  in truncate_inode_page()
227 	truncate_cleanup_page(mapping, page);  in truncate_inode_page()
235 int generic_error_remove_page(struct address_space *mapping, struct page *page)  in generic_error_remove_page()  argument
237 	if (!mapping)  in generic_error_remove_page()
243 	if (!S_ISREG(mapping->host->i_mode))  in generic_error_remove_page()
245 	return truncate_inode_page(mapping, page);  in generic_error_remove_page()
250  * Safely invalidate one page from its pagecache mapping.
257 	struct address_space *mapping = page_mapping(page);  in invalidate_inode_page()  local
258 	if (!mapping)  in invalidate_inode_page()
264 	return invalidate_complete_page(mapping, page);  in invalidate_inode_page()
269  * @mapping: mapping to truncate
284  * mapping is large, it is probably the case that the final pages are the most
291 void truncate_inode_pages_range(struct address_space *mapping,  in truncate_inode_pages_range()  argument
303 	if (mapping->nrpages == 0 && mapping->nrexceptional == 0)  in truncate_inode_pages_range()
329 	while (index < end && pagevec_lookup_entries(&pvec, mapping, index,  in truncate_inode_pages_range()
358 			if (page->mapping != mapping) {  in truncate_inode_pages_range()
365 			truncate_cleanup_page(mapping, locked_pvec.pages[i]);  in truncate_inode_pages_range()
366 		delete_from_page_cache_batch(mapping, &locked_pvec);  in truncate_inode_pages_range()
369 		truncate_exceptional_pvec_entries(mapping, &pvec, indices, end);  in truncate_inode_pages_range()
375 		struct page *page = find_lock_page(mapping, start - 1);  in truncate_inode_pages_range()
385 			cleancache_invalidate_page(mapping, page);  in truncate_inode_pages_range()
394 		struct page *page = find_lock_page(mapping, end);  in truncate_inode_pages_range()
398 			cleancache_invalidate_page(mapping, page);  in truncate_inode_pages_range()
416 		if (!pagevec_lookup_entries(&pvec, mapping, index,  in truncate_inode_pages_range()
449 			truncate_inode_page(mapping, page);  in truncate_inode_pages_range()
452 		truncate_exceptional_pvec_entries(mapping, &pvec, indices, end);  in truncate_inode_pages_range()
458 	cleancache_invalidate_inode(mapping);  in truncate_inode_pages_range()
464  * @mapping: mapping to truncate
471  * mapping->nrpages can be non-zero when this function returns even after
472  * truncation of the whole mapping.
474 void truncate_inode_pages(struct address_space *mapping, loff_t lstart)  in truncate_inode_pages()  argument
476 	truncate_inode_pages_range(mapping, lstart, (loff_t)-1);  in truncate_inode_pages()
482  * @mapping: mapping to truncate
489 void truncate_inode_pages_final(struct address_space *mapping)  in truncate_inode_pages_final()  argument
501 	mapping_set_exiting(mapping);  in truncate_inode_pages_final()
508 	nrpages = mapping->nrpages;  in truncate_inode_pages_final()
510 	nrexceptional = mapping->nrexceptional;  in truncate_inode_pages_final()
519 		xa_lock_irq(&mapping->i_pages);  in truncate_inode_pages_final()
520 		xa_unlock_irq(&mapping->i_pages);  in truncate_inode_pages_final()
527 	truncate_inode_pages(mapping, 0);  in truncate_inode_pages_final()
531 static unsigned long __invalidate_mapping_pages(struct address_space *mapping,  in __invalidate_mapping_pages()  argument
542 	while (index <= end && pagevec_lookup_entries(&pvec, mapping, index,  in __invalidate_mapping_pages()
554 				invalidate_exceptional_entry(mapping, index,  in __invalidate_mapping_pages()
619  * @mapping: the address_space which holds the pages to invalidate
632 unsigned long invalidate_mapping_pages(struct address_space *mapping,  in invalidate_mapping_pages()  argument
635 	return __invalidate_mapping_pages(mapping, start, end, NULL);  in invalidate_mapping_pages()
644 void invalidate_mapping_pagevec(struct address_space *mapping,  in invalidate_mapping_pagevec()  argument
647 	__invalidate_mapping_pages(mapping, start, end, nr_pagevec);  in invalidate_mapping_pagevec()
658 invalidate_complete_page2(struct address_space *mapping, struct page *page)  in invalidate_complete_page2()  argument
662 	if (page->mapping != mapping)  in invalidate_complete_page2()
668 	xa_lock_irqsave(&mapping->i_pages, flags);  in invalidate_complete_page2()
674 	xa_unlock_irqrestore(&mapping->i_pages, flags);  in invalidate_complete_page2()
676 	if (mapping->a_ops->freepage)  in invalidate_complete_page2()
677 		mapping->a_ops->freepage(page);  in invalidate_complete_page2()
682 	xa_unlock_irqrestore(&mapping->i_pages, flags);  in invalidate_complete_page2()
686 static int do_launder_page(struct address_space *mapping, struct page *page)  in do_launder_page()  argument
690 	if (page->mapping != mapping || mapping->a_ops->launder_page == NULL)  in do_launder_page()
692 	return mapping->a_ops->launder_page(page);  in do_launder_page()
697  * @mapping: the address_space
706 int invalidate_inode_pages2_range(struct address_space *mapping,  in invalidate_inode_pages2_range()  argument
717 	if (mapping->nrpages == 0 && mapping->nrexceptional == 0)  in invalidate_inode_pages2_range()
722 	while (index <= end && pagevec_lookup_entries(&pvec, mapping, index,  in invalidate_inode_pages2_range()
734 				if (!invalidate_exceptional_entry2(mapping,  in invalidate_inode_pages2_range()
742 			if (page->mapping != mapping) {  in invalidate_inode_pages2_range()
752 					unmap_mapping_pages(mapping, index,  in invalidate_inode_pages2_range()
759 					unmap_mapping_pages(mapping, index,  in invalidate_inode_pages2_range()
764 			ret2 = do_launder_page(mapping, page);  in invalidate_inode_pages2_range()
766 				if (!invalidate_complete_page2(mapping, page))  in invalidate_inode_pages2_range()
785 	if (dax_mapping(mapping)) {  in invalidate_inode_pages2_range()
786 		unmap_mapping_pages(mapping, start, end - start + 1, false);  in invalidate_inode_pages2_range()
789 	cleancache_invalidate_inode(mapping);  in invalidate_inode_pages2_range()
796  * @mapping: the address_space
803 int invalidate_inode_pages2(struct address_space *mapping)  in invalidate_inode_pages2()  argument
805 	return invalidate_inode_pages2_range(mapping, 0, -1);  in invalidate_inode_pages2()
826 	struct address_space *mapping = inode->i_mapping;  in truncate_pagecache()  local
838 	unmap_mapping_range(mapping, holebegin, 0, 1);  in truncate_pagecache()
839 	truncate_inode_pages(mapping, newsize);  in truncate_pagecache()
840 	unmap_mapping_range(mapping, holebegin, 0, 1);  in truncate_pagecache()
934 	struct address_space *mapping = inode->i_mapping;  in truncate_pagecache_range()  local
951 		unmap_mapping_range(mapping, unmap_start,  in truncate_pagecache_range()
953 	truncate_inode_pages_range(mapping, lstart, lend);  in truncate_pagecache_range()