diff --git a/fs/9p/cache.h b/fs/9p/cache.h
index 00f107af443e..c7e74776ce90 100644
--- a/fs/9p/cache.h
+++ b/fs/9p/cache.h
@@ -8,6 +8,7 @@
 #ifndef _9P_CACHE_H
 #define _9P_CACHE_H
 #ifdef CONFIG_9P_FSCACHE
+#define FSCACHE_USE_OLD_IO_API
 #include <linux/fscache.h>
 #include <linux/spinlock.h>
 
diff --git a/fs/cachefiles/io.c b/fs/cachefiles/io.c
index dbc1c4421116..5ead97de4bb7 100644
--- a/fs/cachefiles/io.c
+++ b/fs/cachefiles/io.c
@@ -58,14 +58,14 @@ static void cachefiles_read_complete(struct kiocb *iocb, long ret, long ret2)
 static int cachefiles_read(struct netfs_cache_resources *cres,
 			   loff_t start_pos,
 			   struct iov_iter *iter,
-			   bool seek_data,
+			   enum netfs_read_from_hole read_hole,
 			   netfs_io_terminated_t term_func,
 			   void *term_func_priv)
 {
 	struct cachefiles_kiocb *ki;
 	struct file *file = cres->cache_priv2;
 	unsigned int old_nofs;
-	ssize_t ret = -ENOBUFS;
+	ssize_t ret = -ENODATA;
 	size_t len = iov_iter_count(iter), skipped = 0;
 
 	_enter("%pD,%li,%llx,%zx/%llx",
@@ -75,7 +75,7 @@ static int cachefiles_read(struct netfs_cache_resources *cres,
 	/* If the caller asked us to seek for data before doing the read, then
 	 * we should do that now.  If we find a gap, we fill it with zeros.
 	 */
-	if (seek_data) {
+	if (read_hole != NETFS_READ_HOLE_IGNORE) {
 		loff_t off = start_pos, off2;
 
 		off2 = vfs_llseek(file, off, SEEK_DATA);
@@ -90,6 +90,9 @@ static int cachefiles_read(struct netfs_cache_resources *cres,
 			 * in the region, so clear the rest of the buffer and
 			 * return success.
 			 */
+			if (read_hole == NETFS_READ_HOLE_FAIL)
+				goto presubmission_error;
+
 			iov_iter_zero(len, iter);
 			skipped = len;
 			ret = 0;
@@ -350,6 +353,24 @@ static int cachefiles_prepare_write(struct netfs_cache_resources *cres,
 	return 0;
 }
 
+/*
+ * Prepare for a write to occur from the fallback I/O API.
+ */
+static int cachefiles_prepare_fallback_write(struct netfs_cache_resources *cres,
+					     pgoff_t index)
+{
+	struct fscache_operation *op = cres->cache_priv;
+	struct cachefiles_object *object;
+	struct cachefiles_cache *cache;
+
+	_enter("%lx", index);
+
+	object = container_of(op->object, struct cachefiles_object, fscache);
+	cache = container_of(object->fscache.cache,
+			     struct cachefiles_cache, cache);
+	return cachefiles_has_space(cache, 0, 1);
+}
+
 /*
  * Clean up an operation.
  */
@@ -376,6 +397,7 @@ static const struct netfs_cache_ops cachefiles_netfs_cache_ops = {
 	.write			= cachefiles_write,
 	.prepare_read		= cachefiles_prepare_read,
 	.prepare_write		= cachefiles_prepare_write,
+	.prepare_fallback_write	= cachefiles_prepare_fallback_write,
 };
 
 /*
diff --git a/fs/cifs/fscache.h b/fs/cifs/fscache.h
index 9baa1d0f22bd..729b51100a6d 100644
--- a/fs/cifs/fscache.h
+++ b/fs/cifs/fscache.h
@@ -9,6 +9,7 @@
 #ifndef _CIFS_FSCACHE_H
 #define _CIFS_FSCACHE_H
 
+#define FSCACHE_USE_OLD_IO_API
 #include <linux/fscache.h>
 
 #include "cifsglob.h"
diff --git a/fs/fscache/internal.h b/fs/fscache/internal.h
index c3e4804b8fcb..1d1046408311 100644
--- a/fs/fscache/internal.h
+++ b/fs/fscache/internal.h
@@ -180,12 +180,15 @@ extern atomic_t fscache_n_stores;
 extern atomic_t fscache_n_stores_ok;
 extern atomic_t fscache_n_stores_again;
 extern atomic_t fscache_n_stores_nobufs;
+extern atomic_t fscache_n_stores_intr;
 extern atomic_t fscache_n_stores_oom;
 extern atomic_t fscache_n_store_ops;
 extern atomic_t fscache_n_store_calls;
 extern atomic_t fscache_n_store_pages;
 extern atomic_t fscache_n_store_radix_deletes;
 extern atomic_t fscache_n_store_pages_over_limit;
+extern atomic_t fscache_n_stores_object_dead;
+extern atomic_t fscache_n_store_op_waits;
 
 extern atomic_t fscache_n_store_vmscan_not_storing;
 extern atomic_t fscache_n_store_vmscan_gone;
diff --git a/fs/fscache/io.c b/fs/fscache/io.c
index 3745a0631618..e633808ba813 100644
--- a/fs/fscache/io.c
+++ b/fs/fscache/io.c
@@ -8,7 +8,10 @@
 #define FSCACHE_DEBUG_LEVEL PAGE
 #include <linux/module.h>
 #define FSCACHE_USE_NEW_IO_API
+#define FSCACHE_USE_FALLBACK_IO_API
 #include <linux/fscache-cache.h>
+#include <linux/uio.h>
+#include <linux/bvec.h>
 #include <linux/slab.h>
 #include <linux/netfs.h>
 #include "internal.h"
@@ -35,7 +38,10 @@ int __fscache_begin_operation(struct netfs_cache_resources *cres,
 
 	_enter("c=%08x", cres->debug_id);
 
-	fscache_stat(&fscache_n_retrievals);
+	if (for_write)
+		fscache_stat(&fscache_n_stores);
+	else
+		fscache_stat(&fscache_n_retrievals);
 
 	if (hlist_empty(&cookie->backing_objects))
 		goto nobufs;
@@ -77,14 +83,23 @@ int __fscache_begin_operation(struct netfs_cache_resources *cres,
 		goto nobufs_unlock_dec;
 	spin_unlock(&cookie->lock);
 
-	fscache_stat(&fscache_n_retrieval_ops);
-
 	/* we wait for the operation to become active, and then process it
 	 * *here*, in this thread, and not in the thread pool */
-	ret = fscache_wait_for_operation_activation(
-		object, op,
-		__fscache_stat(&fscache_n_retrieval_op_waits),
-		__fscache_stat(&fscache_n_retrievals_object_dead));
+	if (for_write) {
+		fscache_stat(&fscache_n_store_ops);
+
+		ret = fscache_wait_for_operation_activation(
+			object, op,
+			__fscache_stat(&fscache_n_store_op_waits),
+			__fscache_stat(&fscache_n_stores_object_dead));
+	} else {
+		fscache_stat(&fscache_n_retrieval_ops);
+
+		ret = fscache_wait_for_operation_activation(
+			object, op,
+			__fscache_stat(&fscache_n_retrieval_op_waits),
+			__fscache_stat(&fscache_n_retrievals_object_dead));
+	}
 	if (ret < 0)
 		goto error;
 
@@ -92,16 +107,27 @@ int __fscache_begin_operation(struct netfs_cache_resources *cres,
 	ret = object->cache->ops->begin_operation(cres, op);
 
 error:
-	if (ret == -ENOMEM)
-		fscache_stat(&fscache_n_retrievals_nomem);
-	else if (ret == -ERESTARTSYS)
-		fscache_stat(&fscache_n_retrievals_intr);
-	else if (ret == -ENODATA)
-		fscache_stat(&fscache_n_retrievals_nodata);
-	else if (ret < 0)
-		fscache_stat(&fscache_n_retrievals_nobufs);
-	else
-		fscache_stat(&fscache_n_retrievals_ok);
+	if (for_write) {
+		if (ret == -ENOMEM)
+			fscache_stat(&fscache_n_stores_oom);
+		else if (ret == -ERESTARTSYS)
+			fscache_stat(&fscache_n_stores_intr);
+		else if (ret < 0)
+			fscache_stat(&fscache_n_stores_nobufs);
+		else
+			fscache_stat(&fscache_n_stores_ok);
+	} else {
+		if (ret == -ENOMEM)
+			fscache_stat(&fscache_n_retrievals_nomem);
+		else if (ret == -ERESTARTSYS)
+			fscache_stat(&fscache_n_retrievals_intr);
+		else if (ret == -ENODATA)
+			fscache_stat(&fscache_n_retrievals_nodata);
+		else if (ret < 0)
+			fscache_stat(&fscache_n_retrievals_nobufs);
+		else
+			fscache_stat(&fscache_n_retrievals_ok);
+	}
 
 	fscache_put_operation(op);
 	_leave(" = %d", ret);
@@ -116,8 +142,83 @@ int __fscache_begin_operation(struct netfs_cache_resources *cres,
 	if (wake_cookie)
 		__fscache_wake_unused_cookie(cookie);
 nobufs:
-	fscache_stat(&fscache_n_retrievals_nobufs);
+	if (for_write)
+		fscache_stat(&fscache_n_stores_nobufs);
+	else
+		fscache_stat(&fscache_n_retrievals_nobufs);
 	_leave(" = -ENOBUFS");
 	return -ENOBUFS;
 }
 EXPORT_SYMBOL(__fscache_begin_operation);
+
+/*
+ * Clean up an operation.
+ */
+static void fscache_end_operation(struct netfs_cache_resources *cres)
+{
+	cres->ops->end_operation(cres);
+}
+
+/*
+ * Fallback page reading interface.
+ */
+int __fscache_fallback_read_page(struct fscache_cookie *cookie, struct page *page)
+{
+	struct netfs_cache_resources cres;
+	struct iov_iter iter;
+	struct bio_vec bvec[1];
+	int ret;
+
+	_enter("%lx", page->index);
+
+	memset(&cres, 0, sizeof(cres));
+	bvec[0].bv_page		= page;
+	bvec[0].bv_offset	= 0;
+	bvec[0].bv_len		= PAGE_SIZE;
+	iov_iter_bvec(&iter, READ, bvec, ARRAY_SIZE(bvec), PAGE_SIZE);
+
+	ret = fscache_begin_read_operation(&cres, cookie);
+	if (ret < 0)
+		return ret;
+
+	ret = fscache_read(&cres, page_offset(page), &iter, NETFS_READ_HOLE_FAIL,
+			   NULL, NULL);
+	fscache_end_operation(&cres);
+	_leave(" = %d", ret);
+	return ret;
+}
+EXPORT_SYMBOL(__fscache_fallback_read_page);
+
+/*
+ * Fallback page writing interface.
+ */
+int __fscache_fallback_write_page(struct fscache_cookie *cookie, struct page *page)
+{
+	struct netfs_cache_resources cres;
+	struct iov_iter iter;
+	struct bio_vec bvec[1];
+	int ret;
+
+	_enter("%lx", page->index);
+
+	memset(&cres, 0, sizeof(cres));
+	bvec[0].bv_page		= page;
+	bvec[0].bv_offset	= 0;
+	bvec[0].bv_len		= PAGE_SIZE;
+	iov_iter_bvec(&iter, WRITE, bvec, ARRAY_SIZE(bvec), PAGE_SIZE);
+
+	ret = __fscache_begin_operation(&cres, cookie, true);
+	if (ret < 0)
+		return ret;
+
+	ret = cres.ops->prepare_fallback_write(&cres, page_index(page));
+	if (ret < 0)
+		goto out;
+
+	ret = fscache_write(&cres, page_offset(page), &iter, NULL, NULL);
+out:
+	fscache_end_operation(&cres);
+	_leave(" = %d", ret);
+	return ret;
+}
+EXPORT_SYMBOL(__fscache_fallback_write_page);
diff --git a/fs/fscache/page.c b/fs/fscache/page.c
index 27df94ef0e0b..ed41a00b861c 100644
--- a/fs/fscache/page.c
+++ b/fs/fscache/page.c
@@ -7,6 +7,7 @@
 
 #define FSCACHE_DEBUG_LEVEL PAGE
 #include <linux/module.h>
+#define FSCACHE_USE_OLD_IO_API
 #include <linux/fscache-cache.h>
 #include <linux/buffer_head.h>
 #include <linux/pagevec.h>
diff --git a/fs/fscache/stats.c b/fs/fscache/stats.c
index a7c3ed89a3e0..3ffa34c99977 100644
--- a/fs/fscache/stats.c
+++ b/fs/fscache/stats.c
@@ -54,12 +54,15 @@ atomic_t fscache_n_stores;
 atomic_t fscache_n_stores_ok;
 atomic_t fscache_n_stores_again;
 atomic_t fscache_n_stores_nobufs;
+atomic_t fscache_n_stores_intr;
 atomic_t fscache_n_stores_oom;
 atomic_t fscache_n_store_ops;
 atomic_t fscache_n_store_calls;
 atomic_t fscache_n_store_pages;
 atomic_t fscache_n_store_radix_deletes;
 atomic_t fscache_n_store_pages_over_limit;
+atomic_t fscache_n_stores_object_dead;
+atomic_t fscache_n_store_op_waits;
 
 atomic_t fscache_n_store_vmscan_not_storing;
 atomic_t fscache_n_store_vmscan_gone;
@@ -221,18 +224,21 @@ int fscache_stats_show(struct seq_file *m, void *v)
 		   atomic_read(&fscache_n_retrieval_op_waits),
 		   atomic_read(&fscache_n_retrievals_object_dead));
 
-	seq_printf(m, "Stores : n=%u ok=%u agn=%u nbf=%u oom=%u\n",
+	seq_printf(m, "Stores : n=%u ok=%u agn=%u nbf=%u int=%u oom=%u\n",
 		   atomic_read(&fscache_n_stores),
 		   atomic_read(&fscache_n_stores_ok),
 		   atomic_read(&fscache_n_stores_again),
 		   atomic_read(&fscache_n_stores_nobufs),
+		   atomic_read(&fscache_n_stores_intr),
 		   atomic_read(&fscache_n_stores_oom));
-	seq_printf(m, "Stores : ops=%u run=%u pgs=%u rxd=%u olm=%u\n",
+	seq_printf(m, "Stores : ops=%u owt=%u run=%u pgs=%u rxd=%u olm=%u abt=%u\n",
 		   atomic_read(&fscache_n_store_ops),
+		   atomic_read(&fscache_n_store_op_waits),
 		   atomic_read(&fscache_n_store_calls),
 		   atomic_read(&fscache_n_store_pages),
 		   atomic_read(&fscache_n_store_radix_deletes),
-		   atomic_read(&fscache_n_store_pages_over_limit));
+		   atomic_read(&fscache_n_store_pages_over_limit),
+		   atomic_read(&fscache_n_stores_object_dead));
 
 	seq_printf(m, "VmScan : nos=%u gon=%u bsy=%u can=%u wt=%u\n",
 		   atomic_read(&fscache_n_store_vmscan_not_storing),
diff --git a/fs/netfs/read_helper.c b/fs/netfs/read_helper.c
index 0b6cd3b8734c..31219c103610 100644
--- a/fs/netfs/read_helper.c
+++ b/fs/netfs/read_helper.c
@@ -170,7 +170,7 @@ static void netfs_cache_read_terminated(void *priv, ssize_t transferred_or_error
  */
 static void netfs_read_from_cache(struct netfs_read_request *rreq,
 				  struct netfs_read_subrequest *subreq,
-				  bool seek_data)
+				  enum netfs_read_from_hole read_hole)
 {
 	struct netfs_cache_resources *cres = &rreq->cache_resources;
 	struct iov_iter iter;
@@ -180,7 +180,7 @@ static void netfs_read_from_cache(struct netfs_read_request *rreq,
 			subreq->start + subreq->transferred,
 			subreq->len   - subreq->transferred);
 
-	cres->ops->read(cres, subreq->start, &iter, seek_data,
+	cres->ops->read(cres, subreq->start, &iter, read_hole,
 			netfs_cache_read_terminated, subreq);
 }
 
@@ -468,7 +468,7 @@ static void netfs_rreq_short_read(struct netfs_read_request *rreq,
 	netfs_get_read_subrequest(subreq);
 	atomic_inc(&rreq->nr_rd_ops);
 	if (subreq->source == NETFS_READ_FROM_CACHE)
-		netfs_read_from_cache(rreq, subreq, true);
+		netfs_read_from_cache(rreq, subreq, NETFS_READ_HOLE_CLEAR);
 	else
 		netfs_read_from_server(rreq, subreq);
 }
@@ -796,7 +796,7 @@ static bool netfs_rreq_submit_slice(struct netfs_read_request *rreq,
 		netfs_read_from_server(rreq, subreq);
 		break;
 	case NETFS_READ_FROM_CACHE:
-		netfs_read_from_cache(rreq, subreq, false);
+		netfs_read_from_cache(rreq, subreq, NETFS_READ_HOLE_IGNORE);
 		break;
 	default:
 		BUG();
diff --git a/fs/nfs/fscache.h b/fs/nfs/fscache.h
index 6754c8607230..6118cdd2e1d7 100644
--- a/fs/nfs/fscache.h
+++ b/fs/nfs/fscache.h
@@ -11,6 +11,7 @@
 #include <linux/nfs_fs.h>
 #include <linux/nfs_mount.h>
 #include <linux/nfs4_mount.h>
+#define FSCACHE_USE_OLD_IO_API
 #include <linux/fscache.h>
 
 #ifdef CONFIG_NFS_FSCACHE
diff --git a/include/linux/fscache.h b/include/linux/fscache.h
index 5e3ddb11715a..715fb830e982 100644
--- a/include/linux/fscache.h
+++ b/include/linux/fscache.h
@@ -24,15 +24,13 @@
 #if defined(CONFIG_FSCACHE) || defined(CONFIG_FSCACHE_MODULE)
 #define fscache_available() (1)
 #define fscache_cookie_valid(cookie) (cookie)
+#define fscache_resources_valid(cres) ((cres)->cache_priv)
 #else
 #define fscache_available() (0)
 #define fscache_cookie_valid(cookie) (0)
+#define fscache_resources_valid(cres) (false)
 #endif
 
-
-/* pattern used to fill dead space in an index entry */
-#define FSCACHE_INDEX_DEADFILL_PATTERN 0x79
-
 struct pagevec;
 struct fscache_cache_tag;
 struct fscache_cookie;
@@ -199,7 +197,12 @@ extern void __fscache_wait_on_invalidate(struct fscache_cookie *);
 #ifdef FSCACHE_USE_NEW_IO_API
 extern int __fscache_begin_operation(struct netfs_cache_resources *, struct fscache_cookie *,
 				     bool);
-#else
+#endif
+#ifdef FSCACHE_USE_FALLBACK_IO_API
+extern int __fscache_fallback_read_page(struct fscache_cookie *, struct page *);
+extern int __fscache_fallback_write_page(struct fscache_cookie *, struct page *);
+#endif
+#ifdef FSCACHE_USE_OLD_IO_API
 extern int __fscache_read_or_alloc_page(struct fscache_cookie *,
 					struct page *,
 					fscache_rw_complete_t,
@@ -223,7 +226,8 @@ extern void __fscache_uncache_all_inode_pages(struct fscache_cookie *,
 					      struct inode *);
 extern void __fscache_readpages_cancel(struct fscache_cookie *cookie,
 				       struct list_head *pages);
-#endif /* FSCACHE_USE_NEW_IO_API */
+
+#endif /* FSCACHE_USE_OLD_IO_API */
 
 extern void __fscache_disable_cookie(struct fscache_cookie *, const void *, bool);
 extern void __fscache_enable_cookie(struct fscache_cookie *, const void *, loff_t,
@@ -537,7 +541,85 @@ int fscache_begin_read_operation(struct netfs_cache_resources *cres,
 	return -ENOBUFS;
 }
 
-#else /* FSCACHE_USE_NEW_IO_API */
+/**
+ * fscache_operation_valid - Return true if operations resources are usable
+ * @cres: The resources to check.
+ *
+ * Returns a pointer to the operations table if usable or NULL if not.
+ */
+static inline
+const struct netfs_cache_ops *fscache_operation_valid(const struct netfs_cache_resources *cres)
+{
+	return fscache_resources_valid(cres) ? cres->ops : NULL;
+}
+
+/**
+ * fscache_read - Start a read from the cache.
+ * @cres: The cache resources to use
+ * @start_pos: The beginning file offset in the cache file
+ * @iter: The buffer to fill - and also the length
+ * @read_hole: How to handle a hole in the data.
+ * @term_func: The function to call upon completion
+ * @term_func_priv: The private data for @term_func
+ *
+ * Start a read from the cache.  @cres indicates the cache object to read from
+ * and must be obtained by a call to fscache_begin_operation() beforehand.
+ *
+ * The data is read into the iterator, @iter, and that also indicates the size
+ * of the operation.  @start_pos is the start position in the file, though if
+ * @seek_data is set appropriately, the cache can use SEEK_DATA to find the
+ * next piece of data, writing zeros for the hole into the iterator.
+ *
+ * Upon termination of the operation, @term_func will be called and supplied
+ * with @term_func_priv plus the amount of data written, if successful, or the
+ * error code otherwise.
+ */
+static inline
+int fscache_read(struct netfs_cache_resources *cres,
+		 loff_t start_pos,
+		 struct iov_iter *iter,
+		 enum netfs_read_from_hole read_hole,
+		 netfs_io_terminated_t term_func,
+		 void *term_func_priv)
+{
+	const struct netfs_cache_ops *ops = fscache_operation_valid(cres);
+	return ops->read(cres, start_pos, iter, read_hole,
+			 term_func, term_func_priv);
+}
+
+/**
+ * fscache_write - Start a write to the cache.
+ * @cres: The cache resources to use
+ * @start_pos: The beginning file offset in the cache file
+ * @iter: The data to write - and also the length
+ * @term_func: The function to call upon completion
+ * @term_func_priv: The private data for @term_func
+ *
+ * Start a write to the cache.  @cres indicates the cache object to write to and
+ * must be obtained by a call to fscache_begin_operation() beforehand.
+ *
+ * The data to be written is obtained from the iterator, @iter, and that also
+ * indicates the size of the operation.  @start_pos is the start position in
+ * the file.
+ *
+ * Upon termination of the operation, @term_func will be called and supplied
+ * with @term_func_priv plus the amount of data written, if successful, or the
+ * error code otherwise.
+ */
+static inline
+int fscache_write(struct netfs_cache_resources *cres,
+		  loff_t start_pos,
+		  struct iov_iter *iter,
+		  netfs_io_terminated_t term_func,
+		  void *term_func_priv)
+{
+	const struct netfs_cache_ops *ops = fscache_operation_valid(cres);
+	return ops->write(cres, start_pos, iter, term_func, term_func_priv);
+}
+
+#endif /* FSCACHE_USE_NEW_IO_API */
+
+#ifdef FSCACHE_USE_OLD_IO_API
 
 /**
  * fscache_read_or_alloc_page - Read a page from the cache or allocate a block
@@ -818,7 +900,7 @@ void fscache_uncache_all_inode_pages(struct fscache_cookie *cookie,
 		__fscache_uncache_all_inode_pages(cookie, inode);
 }
 
-#endif /* FSCACHE_USE_NEW_IO_API */
+#endif /* FSCACHE_USE_OLD_IO_API */
 
 /**
  * fscache_disable_cookie - Disable a cookie
@@ -874,4 +956,48 @@ void fscache_enable_cookie(struct fscache_cookie *cookie,
 					can_enable, data);
 }
 
+#ifdef FSCACHE_USE_FALLBACK_IO_API
+
+/**
+ * fscache_fallback_read_page - Read a page from a cache object (DANGEROUS)
+ * @cookie: The cookie representing the cache object
+ * @page: The page to be read to
+ *
+ * Synchronously read a page from the cache.  The page's offset is used to
+ * indicate where to read.
+ *
+ * This is dangerous and should be moved away from as it relies on the
+ * assumption that the backing filesystem will exactly record the blocks we
+ * have stored there.
+ */
+static inline
+int fscache_fallback_read_page(struct fscache_cookie *cookie, struct page *page)
+{
+	if (fscache_cookie_enabled(cookie))
+		return __fscache_fallback_read_page(cookie, page);
+	return -ENOBUFS;
+}
+
+/**
+ * fscache_fallback_write_page - Write a page to a cache object (DANGEROUS)
+ * @cookie: The cookie representing the cache object
+ * @page: The page to be written from
+ *
+ * Synchronously write a page to the cache.  The page's offset is used to
+ * indicate where to write.
+ *
+ * This is dangerous and should be moved away from as it relies on the
+ * assumption that the backing filesystem will exactly record the blocks we
+ * have stored there.
+ */
+static inline
+int fscache_fallback_write_page(struct fscache_cookie *cookie, struct page *page)
+{
+	if (fscache_cookie_enabled(cookie))
+		return __fscache_fallback_write_page(cookie, page);
+	return -ENOBUFS;
+}
+
+#endif /* FSCACHE_USE_FALLBACK_IO_API */
+
 #endif /* _LINUX_FSCACHE_H */
diff --git a/include/linux/netfs.h b/include/linux/netfs.h
index 5d6a4158a9a6..014fb502fd91 100644
--- a/include/linux/netfs.h
+++ b/include/linux/netfs.h
@@ -174,6 +174,15 @@ struct netfs_read_request_ops {
 	void (*cleanup)(struct address_space *mapping, void *netfs_priv);
 };
 
+/*
+ * How to handle reading from a hole.
+ */
+enum netfs_read_from_hole {
+	NETFS_READ_HOLE_IGNORE,
+	NETFS_READ_HOLE_CLEAR,
+	NETFS_READ_HOLE_FAIL,
+};
+
 /*
  * Table of operations for access to a cache.  This is obtained by
  * rreq->ops->begin_cache_operation().
@@ -186,7 +195,7 @@ struct netfs_cache_ops {
 	int (*read)(struct netfs_cache_resources *cres,
 		    loff_t start_pos,
 		    struct iov_iter *iter,
-		    bool seek_data,
+		    enum netfs_read_from_hole read_hole,
 		    netfs_io_terminated_t term_func,
 		    void *term_func_priv);
 
@@ -212,6 +221,12 @@ struct netfs_cache_ops {
 	 */
 	int (*prepare_write)(struct netfs_cache_resources *cres,
 			     loff_t *_start, size_t *_len, loff_t i_size);
+
+	/* Prepare a write operation for the fallback fscache API, working out
+	 * whether we can cache a page or not.
+	 */
+	int (*prepare_fallback_write)(struct netfs_cache_resources *cres,
+				      pgoff_t index);
 };
 
 struct readahead_control;
