fs/netfs/misc.c

12  * Attach a folio to the buffer and maybe set marks on it to say that we need
13  * to put the folio later and twiddle the pagecache flags.
16 			    struct folio *folio, unsigned int flags,
19 	XA_STATE_ORDER(xas, xa, index, folio_order(folio));
24 		xas_store(&xas, folio);
50 	struct folio *folio;
57 		/* TODO: Figure out what order folio can be allocated here */
58 		folio = filemap_alloc_folio(readahead_gfp_mask(mapping), 0);
59 		if (!folio)
61 		folio->index = index;
62 		ret = netfs_xa_store_and_mark(buffer, index, folio,
65 			folio_put(folio);
69 		index += folio_nr_pages(folio);
81 	struct folio *folio;
85 	xas_for_each_marked(&xas, folio, ULONG_MAX, NETFS_BUF_PUT_MARK) {
86 		folio_put(folio);
93  * netfs_dirty_folio - Mark folio dirty and pin a cache object for writeback
94  * @mapping: The mapping the folio belongs to.
95  * @folio: The folio being dirtied.
97  * Set the dirty flag on a folio and pin an in-use cache object in memory so
101  * Return: true if the dirty flag was set on the folio, false otherwise.
103 bool netfs_dirty_folio(struct address_space *mapping, struct folio *folio)
112 	if (!filemap_dirty_folio(mapping, folio))
170  * netfs_invalidate_folio - Invalidate or partially invalidate a folio
171  * @folio: Folio proposed for release
175  * Invalidate part or all of a folio for a network filesystem.  The folio will
176  * be removed afterwards if the invalidated region covers the entire folio.
178 void netfs_invalidate_folio(struct folio *folio, size_t offset, size_t length)
181 	size_t flen = folio_size(folio);
183 	_enter("{%lx},%zx,%zx", folio->index, offset, length);
185 	folio_wait_fscache(folio);
187 	if (!folio_test_private(folio))
190 	finfo = netfs_folio_info(folio);
218 	netfs_put_group(netfs_folio_group(folio));
219 	folio_detach_private(folio);
220 	folio_clear_uptodate(folio);
233  * netfs_release_folio - Try to release a folio
234  * @folio: Folio proposed for release
237  * Request release of a folio and clean up its private state if it's not busy.
238  * Returns true if the folio can now be released, false if not
240 bool netfs_release_folio(struct folio *folio, gfp_t gfp)
242 	struct netfs_inode *ctx = netfs_inode(folio_inode(folio));
245 	end = folio_pos(folio) + folio_size(folio);
249 	if (folio_test_private(folio))
251 	if (folio_test_fscache(folio)) {
254 		folio_wait_fscache(folio);