ocfs2: rework ocfs2_buffered_write_cluster()
Use some ideas from the new-aops patch series and turn
ocfs2_buffered_write_cluster() into a 2 stage operation with the caller
copying data in between. The code now understands multiple cluster writes as
a result of having to deal with a full page write for greater than 4k pages.
This sets us up to easily call into the write path during ->page_mkwrite().
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
diff --git a/fs/ocfs2/aops.h b/fs/ocfs2/aops.h
index 45821d4..bdcdd1a 100644
--- a/fs/ocfs2/aops.h
+++ b/fs/ocfs2/aops.h
@@ -42,57 +42,13 @@
int (*fn)( handle_t *handle,
struct buffer_head *bh));
-struct ocfs2_write_ctxt;
-typedef int (ocfs2_page_writer)(struct inode *, struct ocfs2_write_ctxt *,
- u64 *, unsigned int *, unsigned int *);
+int ocfs2_write_begin(struct file *file, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned flags,
+ struct page **pagep, void **fsdata);
-ssize_t ocfs2_buffered_write_cluster(struct file *file, loff_t pos,
- size_t count, ocfs2_page_writer *actor,
- void *priv);
-
-struct ocfs2_write_ctxt {
- size_t w_count;
- loff_t w_pos;
- u32 w_cpos;
- unsigned int w_finished_copy;
-
- /* This is true if page_size > cluster_size */
- unsigned int w_large_pages;
-
- /* Filler callback and private data */
- ocfs2_page_writer *w_write_data_page;
- void *w_private;
-
- /* Only valid for the filler callback */
- struct page *w_this_page;
- unsigned int w_this_page_new;
-};
-
-struct ocfs2_buffered_write_priv {
- char *b_src_buf;
- const struct iovec *b_cur_iov; /* Current iovec */
- size_t b_cur_off; /* Offset in the
- * current iovec */
-};
-int ocfs2_map_and_write_user_data(struct inode *inode,
- struct ocfs2_write_ctxt *wc,
- u64 *p_blkno,
- unsigned int *ret_from,
- unsigned int *ret_to);
-
-struct ocfs2_splice_write_priv {
- struct splice_desc *s_sd;
- struct pipe_buffer *s_buf;
- struct pipe_inode_info *s_pipe;
- /* Neither offset value is ever larger than one page */
- unsigned int s_offset;
- unsigned int s_buf_offset;
-};
-int ocfs2_map_and_write_splice_data(struct inode *inode,
- struct ocfs2_write_ctxt *wc,
- u64 *p_blkno,
- unsigned int *ret_from,
- unsigned int *ret_to);
+int ocfs2_write_end(struct file *file, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned copied,
+ struct page *page, void *fsdata);
/* all ocfs2_dio_end_io()'s fault */
#define ocfs2_iocb_is_rw_locked(iocb) \