1 files changed, 35 insertions, 24 deletions

diff --git a/fs/afs/internal.h b/fs/afs/internal.h
index 1627b1872812..52157a05796a 100644
--- a/fs/afs/internal.h
+++ b/fs/afs/internal.h
@@ -14,6 +14,7 @@
 #include <linux/key.h>
 #include <linux/workqueue.h>
 #include <linux/sched.h>
+#define FSCACHE_USE_NEW_IO_API
 #include <linux/fscache.h>
 #include <linux/backing-dev.h>
 #include <linux/uuid.h>
@@ -31,6 +32,7 @@
 
 struct pagevec;
 struct afs_call;
+struct afs_vnode;
 
 /*
  * Partial file-locking emulation mode.  (The problem being that AFS3 only
@@ -104,7 +106,9 @@ struct afs_call {
 	struct afs_server	*server;	/* The fileserver record if fs op (pins ref) */
 	struct afs_vlserver	*vlserver;	/* The vlserver record if vl op */
 	void			*request;	/* request data (first part) */
+	size_t			iov_len;	/* Size of *iter to be used */
 	struct iov_iter		def_iter;	/* Default buffer/data iterator */
+	struct iov_iter		*write_iter;	/* Iterator defining write to be made */
 	struct iov_iter		*iter;		/* Iterator currently in use */
 	union {	/* Convenience for ->def_iter */
 		struct kvec	kvec[1];
@@ -131,7 +135,6 @@ struct afs_call {
 	unsigned char		unmarshall;	/* unmarshalling phase */
 	unsigned char		addr_ix;	/* Address in ->alist */
 	bool			drop_ref;	/* T if need to drop ref for incoming call */
-	bool			send_pages;	/* T if data from mapping should be sent */
 	bool			need_attention;	/* T if RxRPC poked us */
 	bool			async;		/* T if asynchronous */
 	bool			upgrade;	/* T to request service upgrade */
@@ -202,17 +205,19 @@ struct afs_read {
 	loff_t			pos;		/* Where to start reading */
 	loff_t			len;		/* How much we're asking for */
 	loff_t			actual_len;	/* How much we're actually getting */
-	loff_t			remain;		/* Amount remaining */
 	loff_t			file_size;	/* File size returned by server */
+	struct key		*key;		/* The key to use to reissue the read */
+	struct afs_vnode	*vnode;		/* The file being read into. */
+	struct netfs_read_subrequest *subreq;	/* Fscache helper read request this belongs to */
 	afs_dataversion_t	data_version;	/* Version number returned by server */
 	refcount_t		usage;
-	unsigned int		index;		/* Which page we're reading into */
+	unsigned int		call_debug_id;
 	unsigned int		nr_pages;
-	unsigned int		offset;		/* offset into current page */
-	struct afs_vnode	*vnode;
-	void (*page_done)(struct afs_read *);
-	struct page		**pages;
-	struct page		*array[];
+	int			error;
+	void (*done)(struct afs_read *);
+	void (*cleanup)(struct afs_read *);
+	struct iov_iter		*iter;		/* Iterator representing the buffer */
+	struct iov_iter		def_iter;	/* Default iterator */
 };
 
 /*
@@ -739,6 +744,7 @@ struct afs_operation_ops {
 	void (*issue_yfs_rpc)(struct afs_operation *op);
 	void (*success)(struct afs_operation *op);
 	void (*aborted)(struct afs_operation *op);
+	void (*failed)(struct afs_operation *op);
 	void (*edit_dir)(struct afs_operation *op);
 	void (*put)(struct afs_operation *op);
 };
@@ -808,12 +814,11 @@ struct afs_operation {
 			afs_lock_type_t type;
 		} lock;
 		struct {
-			struct address_space *mapping;	/* Pages being written from */
-			pgoff_t		first;		/* first page in mapping to deal with */
-			pgoff_t		last;		/* last page in mapping to deal with */
-			unsigned	first_offset;	/* offset into mapping[first] */
-			unsigned	last_to;	/* amount of mapping[last] */
-			bool		laundering;	/* Laundering page, PG_writeback not set */
+			struct iov_iter	*write_iter;
+			loff_t	pos;
+			loff_t	size;
+			loff_t	i_size;
+			bool	laundering;	/* Laundering page, PG_writeback not set */
 		} store;
 		struct {
 			struct iattr	*attr;
@@ -875,31 +880,31 @@ struct afs_vnode_cache_aux {
 #define __AFS_PAGE_PRIV_MMAPPED	0x8000UL
 #endif
 
-static inline unsigned int afs_page_dirty_resolution(void)
+static inline unsigned int afs_page_dirty_resolution(struct page *page)
 {
-	int shift = PAGE_SHIFT - (__AFS_PAGE_PRIV_SHIFT - 1);
+	int shift = thp_order(page) + PAGE_SHIFT - (__AFS_PAGE_PRIV_SHIFT - 1);
 	return (shift > 0) ? shift : 0;
 }
 
-static inline size_t afs_page_dirty_from(unsigned long priv)
+static inline size_t afs_page_dirty_from(struct page *page, unsigned long priv)
 {
 	unsigned long x = priv & __AFS_PAGE_PRIV_MASK;
 
 	/* The lower bound is inclusive */
-	return x << afs_page_dirty_resolution();
+	return x << afs_page_dirty_resolution(page);
 }
 
-static inline size_t afs_page_dirty_to(unsigned long priv)
+static inline size_t afs_page_dirty_to(struct page *page, unsigned long priv)
 {
 	unsigned long x = (priv >> __AFS_PAGE_PRIV_SHIFT) & __AFS_PAGE_PRIV_MASK;
 
 	/* The upper bound is immediately beyond the region */
-	return (x + 1) << afs_page_dirty_resolution();
+	return (x + 1) << afs_page_dirty_resolution(page);
 }
 
-static inline unsigned long afs_page_dirty(size_t from, size_t to)
+static inline unsigned long afs_page_dirty(struct page *page, size_t from, size_t to)
 {
-	unsigned int res = afs_page_dirty_resolution();
+	unsigned int res = afs_page_dirty_resolution(page);
 	from >>= res;
 	to = (to - 1) >> res;
 	return (to << __AFS_PAGE_PRIV_SHIFT) | from;
@@ -1040,13 +1045,14 @@ extern void afs_dynroot_depopulate(struct super_block *);
 extern const struct address_space_operations afs_fs_aops;
 extern const struct inode_operations afs_file_inode_operations;
 extern const struct file_operations afs_file_operations;
+extern const struct netfs_read_request_ops afs_req_ops;
 
 extern int afs_cache_wb_key(struct afs_vnode *, struct afs_file *);
 extern void afs_put_wb_key(struct afs_wb_key *);
 extern int afs_open(struct inode *, struct file *);
 extern int afs_release(struct inode *, struct file *);
-extern int afs_fetch_data(struct afs_vnode *, struct key *, struct afs_read *);
-extern int afs_page_filler(void *, struct page *);
+extern int afs_fetch_data(struct afs_vnode *, struct afs_read *);
+extern struct afs_read *afs_alloc_read(gfp_t);
 extern void afs_put_read(struct afs_read *);
 
 static inline struct afs_read *afs_get_read(struct afs_read *req)
@@ -1270,6 +1276,7 @@ static inline void afs_make_op_call(struct afs_operation *op, struct afs_call *c
 
 static inline void afs_extract_begin(struct afs_call *call, void *buf, size_t size)
 {
+	call->iov_len = size;
 	call->kvec[0].iov_base = buf;
 	call->kvec[0].iov_len = size;
 	iov_iter_kvec(&call->def_iter, READ, call->kvec, 1, size);
@@ -1277,21 +1284,25 @@ static inline void afs_extract_begin(struct afs_call *call, void *buf, size_t si
 
 static inline void afs_extract_to_tmp(struct afs_call *call)
 {
+	call->iov_len = sizeof(call->tmp);
 	afs_extract_begin(call, &call->tmp, sizeof(call->tmp));
 }
 
 static inline void afs_extract_to_tmp64(struct afs_call *call)
 {
+	call->iov_len = sizeof(call->tmp64);
 	afs_extract_begin(call, &call->tmp64, sizeof(call->tmp64));
 }
 
 static inline void afs_extract_discard(struct afs_call *call, size_t size)
 {
+	call->iov_len = size;
 	iov_iter_discard(&call->def_iter, READ, size);
 }
 
 static inline void afs_extract_to_buf(struct afs_call *call, size_t size)
 {
+	call->iov_len = size;
 	afs_extract_begin(call, call->buffer, size);
 }