1 files changed, 35 insertions, 1 deletions

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 22833691e98c..ca9fda64dd4f 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -168,7 +168,20 @@ struct mpage_da_data {
         int pages_written;
         int retval;
 };
-#define EXT4_IO_UNWRITTEN       0x1
+
+/*
+ * Flags for ext4_io_end->flags
+ */
+#define EXT4_IO_END_UNWRITTEN   0x0001
+#define EXT4_IO_END_ERROR       0x0002
+
+struct ext4_io_page {
+        struct page     *p_page;
+        int             p_count;
+};
+
+#define MAX_IO_PAGES 128
+
 typedef struct ext4_io_end {
         struct list_head        list;           /* per-file finished IO list */
         struct inode            *inode;         /* file being written to */
@@ -179,8 +192,18 @@ typedef struct ext4_io_end {
         struct work_struct      work;           /* data work queue */
         struct kiocb            *iocb;          /* iocb struct for AIO */
         int                     result;         /* error value for AIO */
+        int                     num_io_pages;
+        struct ext4_io_page     *pages[MAX_IO_PAGES];
 } ext4_io_end_t;
 
+struct ext4_io_submit {
+        int                     io_op;
+        struct bio              *io_bio;
+        ext4_io_end_t           *io_end;
+        struct ext4_io_page     *io_page;
+        sector_t                io_next_block;
+};
+
 /*
  * Special inodes numbers
  */
@@ -2044,6 +2067,17 @@ extern int ext4_move_extents(struct file *o_filp, struct file *d_filp,
                              __u64 start_orig, __u64 start_donor,
                              __u64 len, __u64 *moved_len);
 
+/* page-io.c */
+extern int __init init_ext4_pageio(void);
+extern void exit_ext4_pageio(void);
+extern void ext4_free_io_end(ext4_io_end_t *io);
+extern ext4_io_end_t *ext4_init_io_end(struct inode *inode, gfp_t flags);
+extern int ext4_end_io_nolock(ext4_io_end_t *io);
+extern void ext4_io_submit(struct ext4_io_submit *io);
+extern int ext4_bio_write_page(struct ext4_io_submit *io,
+                               struct page *page,
+                               int len,
+                               struct writeback_control *wbc);
 
 /* BH_Uninit flag: blocks are allocated but uninitialized on disk */
 enum ext4_state_bits {