26 static void clear_shadow_entries(struct address_space *mapping,  in clear_shadow_entries()  argument
29 	XA_STATE(xas, &mapping->i_pages, start);  in clear_shadow_entries()
33 	if (shmem_mapping(mapping) || dax_mapping(mapping))  in clear_shadow_entries()
38 	spin_lock(&mapping->host->i_lock);  in clear_shadow_entries()
48 	if (mapping_shrinkable(mapping))  in clear_shadow_entries()
49 		inode_add_lru(mapping->host);  in clear_shadow_entries()
50 	spin_unlock(&mapping->host->i_lock);  in clear_shadow_entries()
60 static void truncate_folio_batch_exceptionals(struct address_space *mapping,  in truncate_folio_batch_exceptionals()  argument
63 	XA_STATE(xas, &mapping->i_pages, indices[0]);  in truncate_folio_batch_exceptionals()
69 	if (shmem_mapping(mapping))  in truncate_folio_batch_exceptionals()
79 	if (dax_mapping(mapping)) {  in truncate_folio_batch_exceptionals()
82 				dax_delete_mapping_entry(mapping, indices[i]);  in truncate_folio_batch_exceptionals()
90 	spin_lock(&mapping->host->i_lock);  in truncate_folio_batch_exceptionals()
99 	if (mapping_shrinkable(mapping))  in truncate_folio_batch_exceptionals()
100 		inode_add_lru(mapping->host);  in truncate_folio_batch_exceptionals()
101 	spin_unlock(&mapping->host->i_lock);  in truncate_folio_batch_exceptionals()
123 	const struct address_space_operations *aops = folio->mapping->a_ops;  in folio_invalidate()
135  * We need to bail out if page->mapping is no longer equal to the original
136  * mapping.  This happens a) when the VM reclaimed the page while we waited on
156 int truncate_inode_folio(struct address_space *mapping, struct folio *folio)  in truncate_inode_folio()  argument
158 	if (folio->mapping != mapping)  in truncate_inode_folio()
194 		truncate_inode_folio(folio->mapping, folio);  in truncate_inode_partial_folio()
203 	if (!mapping_inaccessible(folio->mapping))  in truncate_inode_partial_folio()
214 	truncate_inode_folio(folio->mapping, folio);  in truncate_inode_partial_folio()
221 int generic_error_remove_folio(struct address_space *mapping,  in generic_error_remove_folio()  argument
224 	if (!mapping)  in generic_error_remove_folio()
230 	if (!S_ISREG(mapping->host->i_mode))  in generic_error_remove_folio()
232 	return truncate_inode_folio(mapping, folio);  in generic_error_remove_folio()
238  * @mapping: The mapping this folio belongs to.
247 long mapping_evict_folio(struct address_space *mapping, struct folio *folio)  in mapping_evict_folio()  argument
250 	if (!mapping)  in mapping_evict_folio()
261 	return remove_mapping(mapping, folio);  in mapping_evict_folio()
266  * @mapping: mapping to truncate
281  * mapping is large, it is probably the case that the final pages are the most
288 void truncate_inode_pages_range(struct address_space *mapping,  in truncate_inode_pages_range()  argument
300 	if (mapping_empty(mapping))  in truncate_inode_pages_range()
322 	while (index < end && find_lock_entries(mapping, &index, end - 1,  in truncate_inode_pages_range()
324 		truncate_folio_batch_exceptionals(mapping, &fbatch, indices);  in truncate_inode_pages_range()
327 		delete_from_page_cache_batch(mapping, &fbatch);  in truncate_inode_pages_range()
335 	folio = __filemap_get_folio(mapping, lstart >> PAGE_SHIFT, FGP_LOCK, 0);  in truncate_inode_pages_range()
349 		folio = __filemap_get_folio(mapping, lend >> PAGE_SHIFT,  in truncate_inode_pages_range()
362 		if (!find_get_entries(mapping, &index, end - 1, &fbatch,  in truncate_inode_pages_range()
383 			truncate_inode_folio(mapping, folio);  in truncate_inode_pages_range()
386 		truncate_folio_batch_exceptionals(mapping, &fbatch, indices);  in truncate_inode_pages_range()
394  * @mapping: mapping to truncate
398  * mapping->invalidate_lock.
402  * mapping->nrpages can be non-zero when this function returns even after
403  * truncation of the whole mapping.
405 void truncate_inode_pages(struct address_space *mapping, loff_t lstart)  in truncate_inode_pages()  argument
407 	truncate_inode_pages_range(mapping, lstart, (loff_t)-1);  in truncate_inode_pages()
413  * @mapping: mapping to truncate
420 void truncate_inode_pages_final(struct address_space *mapping)  in truncate_inode_pages_final()  argument
429 	mapping_set_exiting(mapping);  in truncate_inode_pages_final()
431 	if (!mapping_empty(mapping)) {  in truncate_inode_pages_final()
438 		xa_lock_irq(&mapping->i_pages);  in truncate_inode_pages_final()
439 		xa_unlock_irq(&mapping->i_pages);  in truncate_inode_pages_final()
442 	truncate_inode_pages(mapping, 0);  in truncate_inode_pages_final()
448  * @mapping: the address_space which holds the folios to invalidate
456 unsigned long mapping_try_invalidate(struct address_space *mapping,  in mapping_try_invalidate()  argument
467 	while (find_lock_entries(mapping, &index, end, &fbatch, indices)) {  in mapping_try_invalidate()
482 			ret = mapping_evict_folio(mapping, folio);  in mapping_try_invalidate()
498 			clear_shadow_entries(mapping, indices[0], indices[nr-1]);  in mapping_try_invalidate()
509  * @mapping: the address_space which holds the cache to invalidate
521 unsigned long invalidate_mapping_pages(struct address_space *mapping,  in invalidate_mapping_pages()  argument
524 	return mapping_try_invalidate(mapping, start, end, NULL);  in invalidate_mapping_pages()
528 static int folio_launder(struct address_space *mapping, struct folio *folio)  in folio_launder()  argument
532 	if (folio->mapping != mapping || mapping->a_ops->launder_folio == NULL)  in folio_launder()
534 	return mapping->a_ops->launder_folio(folio);  in folio_launder()
544 int folio_unmap_invalidate(struct address_space *mapping, struct folio *folio,  in folio_unmap_invalidate()  argument
555 	ret = folio_launder(mapping, folio);  in folio_unmap_invalidate()
558 	if (folio->mapping != mapping)  in folio_unmap_invalidate()
563 	spin_lock(&mapping->host->i_lock);  in folio_unmap_invalidate()
564 	xa_lock_irq(&mapping->i_pages);  in folio_unmap_invalidate()
570 	xa_unlock_irq(&mapping->i_pages);  in folio_unmap_invalidate()
571 	if (mapping_shrinkable(mapping))  in folio_unmap_invalidate()
572 		inode_add_lru(mapping->host);  in folio_unmap_invalidate()
573 	spin_unlock(&mapping->host->i_lock);  in folio_unmap_invalidate()
575 	filemap_free_folio(mapping, folio);  in folio_unmap_invalidate()
578 	xa_unlock_irq(&mapping->i_pages);  in folio_unmap_invalidate()
579 	spin_unlock(&mapping->host->i_lock);  in folio_unmap_invalidate()
585  * @mapping: the address_space
594 int invalidate_inode_pages2_range(struct address_space *mapping,  in invalidate_inode_pages2_range()  argument
605 	if (mapping_empty(mapping))  in invalidate_inode_pages2_range()
610 	while (find_get_entries(mapping, &index, end, &fbatch, indices)) {  in invalidate_inode_pages2_range()
621 				if (dax_mapping(mapping) &&  in invalidate_inode_pages2_range()
622 				    !dax_invalidate_mapping_entry_sync(mapping, indices[i]))  in invalidate_inode_pages2_range()
632 				unmap_mapping_pages(mapping, indices[i],  in invalidate_inode_pages2_range()
638 			if (unlikely(folio->mapping != mapping)) {  in invalidate_inode_pages2_range()
644 			ret2 = folio_unmap_invalidate(mapping, folio, GFP_KERNEL);  in invalidate_inode_pages2_range()
651 			clear_shadow_entries(mapping, indices[0], indices[nr-1]);  in invalidate_inode_pages2_range()
664 	if (dax_mapping(mapping)) {  in invalidate_inode_pages2_range()
665 		unmap_mapping_pages(mapping, start, end - start + 1, false);  in invalidate_inode_pages2_range()
673  * @mapping: the address_space
680 int invalidate_inode_pages2(struct address_space *mapping)  in invalidate_inode_pages2()  argument
682 	return invalidate_inode_pages2_range(mapping, 0, -1);  in invalidate_inode_pages2()
703 	struct address_space *mapping = inode->i_mapping;  in truncate_pagecache()  local
715 	unmap_mapping_range(mapping, holebegin, 0, 1);  in truncate_pagecache()
716 	truncate_inode_pages(mapping, newsize);  in truncate_pagecache()
717 	unmap_mapping_range(mapping, holebegin, 0, 1);  in truncate_pagecache()
824 	struct address_space *mapping = inode->i_mapping;  in truncate_pagecache_range()  local
841 		unmap_mapping_range(mapping, unmap_start,  in truncate_pagecache_range()
843 	truncate_inode_pages_range(mapping, lstart, lend);  in truncate_pagecache_range()