1 files changed, 32 insertions, 45 deletions

diff --git a/include/linux/netfs.h b/include/linux/netfs.h
index 77fa6a61706a..f2402ddeafbf 100644
--- a/include/linux/netfs.h
+++ b/include/linux/netfs.h
@@ -119,9 +119,10 @@ typedef void (*netfs_io_terminated_t)(void *priv, ssize_t transferred_or_error,
 				      bool was_async);
 
 /*
- * Per-inode description.  This must be directly after the inode struct.
+ * Per-inode context.  This wraps the VFS inode.
  */
-struct netfs_i_context {
+struct netfs_inode {
+	struct inode		inode;		/* The VFS inode */
 	const struct netfs_request_ops *ops;
 #if IS_ENABLED(CONFIG_FSCACHE)
 	struct fscache_cookie	*cache;
@@ -205,15 +206,16 @@ struct netfs_io_request {
  */
 struct netfs_request_ops {
 	int (*init_request)(struct netfs_io_request *rreq, struct file *file);
+	void (*free_request)(struct netfs_io_request *rreq);
 	int (*begin_cache_operation)(struct netfs_io_request *rreq);
+
 	void (*expand_readahead)(struct netfs_io_request *rreq);
 	bool (*clamp_length)(struct netfs_io_subrequest *subreq);
 	void (*issue_read)(struct netfs_io_subrequest *subreq);
 	bool (*is_still_valid)(struct netfs_io_request *rreq);
 	int (*check_write_begin)(struct file *file, loff_t pos, unsigned len,
-				 struct folio *folio, void **_fsdata);
+				 struct folio **foliop, void **_fsdata);
 	void (*done)(struct netfs_io_request *rreq);
-	void (*cleanup)(struct address_space *mapping, void *netfs_priv);
 };
 
 /*
@@ -256,7 +258,7 @@ struct netfs_cache_ops {
 	 * boundary as appropriate.
 	 */
 	enum netfs_io_source (*prepare_read)(struct netfs_io_subrequest *subreq,
-					       loff_t i_size);
+					     loff_t i_size);
 
 	/* Prepare a write operation, working out what part of the write we can
 	 * actually do.
@@ -274,85 +276,70 @@ struct netfs_cache_ops {
 };
 
 struct readahead_control;
-extern void netfs_readahead(struct readahead_control *);
+void netfs_readahead(struct readahead_control *);
 int netfs_read_folio(struct file *, struct folio *);
-extern int netfs_write_begin(struct file *, struct address_space *,
-			     loff_t, unsigned int, struct folio **,
-			     void **);
+int netfs_write_begin(struct netfs_inode *, struct file *,
+		struct address_space *, loff_t pos, unsigned int len,
+		struct folio **, void **fsdata);
 
-extern void netfs_subreq_terminated(struct netfs_io_subrequest *, ssize_t, bool);
-extern void netfs_get_subrequest(struct netfs_io_subrequest *subreq,
-				 enum netfs_sreq_ref_trace what);
-extern void netfs_put_subrequest(struct netfs_io_subrequest *subreq,
-				 bool was_async, enum netfs_sreq_ref_trace what);
-extern void netfs_stats_show(struct seq_file *);
+void netfs_subreq_terminated(struct netfs_io_subrequest *, ssize_t, bool);
+void netfs_get_subrequest(struct netfs_io_subrequest *subreq,
+			  enum netfs_sreq_ref_trace what);
+void netfs_put_subrequest(struct netfs_io_subrequest *subreq,
+			  bool was_async, enum netfs_sreq_ref_trace what);
+void netfs_stats_show(struct seq_file *);
 
 /**
- * netfs_i_context - Get the netfs inode context from the inode
+ * netfs_inode - Get the netfs inode context from the inode
  * @inode: The inode to query
  *
  * Get the netfs lib inode context from the network filesystem's inode.  The
  * context struct is expected to directly follow on from the VFS inode struct.
  */
-static inline struct netfs_i_context *netfs_i_context(struct inode *inode)
-{
-	return (void *)inode + sizeof(*inode);
-}
-
-/**
- * netfs_inode - Get the netfs inode from the inode context
- * @ctx: The context to query
- *
- * Get the netfs inode from the netfs library's inode context.  The VFS inode
- * is expected to directly precede the context struct.
- */
-static inline struct inode *netfs_inode(struct netfs_i_context *ctx)
+static inline struct netfs_inode *netfs_inode(struct inode *inode)
 {
-	return (void *)ctx - sizeof(struct inode);
+	return container_of(inode, struct netfs_inode, inode);
 }
 
 /**
- * netfs_i_context_init - Initialise a netfs lib context
- * @inode: The inode with which the context is associated
+ * netfs_inode_init - Initialise a netfslib inode context
+ * @ctx: The netfs inode to initialise
  * @ops: The netfs's operations list
  *
  * Initialise the netfs library context struct.  This is expected to follow on
  * directly from the VFS inode struct.
  */
-static inline void netfs_i_context_init(struct inode *inode,
-					const struct netfs_request_ops *ops)
+static inline void netfs_inode_init(struct netfs_inode *ctx,
+				    const struct netfs_request_ops *ops)
 {
-	struct netfs_i_context *ctx = netfs_i_context(inode);
-
-	memset(ctx, 0, sizeof(*ctx));
 	ctx->ops = ops;
-	ctx->remote_i_size = i_size_read(inode);
+	ctx->remote_i_size = i_size_read(&ctx->inode);
+#if IS_ENABLED(CONFIG_FSCACHE)
+	ctx->cache = NULL;
+#endif
 }
 
 /**
  * netfs_resize_file - Note that a file got resized
- * @inode: The inode being resized
+ * @ctx: The netfs inode being resized
  * @new_i_size: The new file size
  *
  * Inform the netfs lib that a file got resized so that it can adjust its state.
  */
-static inline void netfs_resize_file(struct inode *inode, loff_t new_i_size)
+static inline void netfs_resize_file(struct netfs_inode *ctx, loff_t new_i_size)
 {
-	struct netfs_i_context *ctx = netfs_i_context(inode);
-
 	ctx->remote_i_size = new_i_size;
 }
 
 /**
  * netfs_i_cookie - Get the cache cookie from the inode
- * @inode: The inode to query
+ * @ctx: The netfs inode to query
  *
  * Get the caching cookie (if enabled) from the network filesystem's inode.
  */
-static inline struct fscache_cookie *netfs_i_cookie(struct inode *inode)
+static inline struct fscache_cookie *netfs_i_cookie(struct netfs_inode *ctx)
 {
 #if IS_ENABLED(CONFIG_FSCACHE)
-	struct netfs_i_context *ctx = netfs_i_context(inode);
 	return ctx->cache;
 #else
 	return NULL;