[PATCH v2 05/18] ntfs: convert iomap ops to ->iomap_next()

[Joanne Koong <joannelkoong@gmail.com>]

Convert ntfs iomap_ops to the new ->iomap_next() callback. This uses the
iomap_process() helper, which finishes the previous mapping if needed
and produces the next one. No functional changes are intended.

Signed-off-by: Joanne Koong <joannelkoong@gmail.com>
---
 fs/ntfs/iomap.c | 56 ++++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 46 insertions(+), 10 deletions(-)

diff --git a/fs/ntfs/iomap.c b/fs/ntfs/iomap.c
index 52eecf5cb256..0f9f02e1593e 100644
--- a/fs/ntfs/iomap.c
+++ b/fs/ntfs/iomap.c
@@ -277,8 +277,14 @@ static int ntfs_read_iomap_begin(struct inode *inode, loff_t offset, loff_t leng
 			srcmap, true);
 }
 
+static int ntfs_read_iomap_next(const struct iomap_iter *iter,
+		struct iomap *iomap, struct iomap *srcmap)
+{
+	return iomap_process(iter, iomap, srcmap, ntfs_read_iomap_begin, NULL);
+}
+
 const struct iomap_ops ntfs_read_iomap_ops = {
-	.iomap_begin = ntfs_read_iomap_begin,
+	.iomap_next = ntfs_read_iomap_next,
 };
 
 /*
@@ -329,13 +335,25 @@ static int ntfs_zero_read_iomap_end(struct inode *inode, loff_t pos, loff_t leng
 	return written;
 }
 
+static int ntfs_zero_read_iomap_next(const struct iomap_iter *iter,
+		struct iomap *iomap, struct iomap *srcmap)
+{
+	return iomap_process(iter, iomap, srcmap, ntfs_seek_iomap_begin,
+			ntfs_zero_read_iomap_end);
+}
+
 static const struct iomap_ops ntfs_zero_read_iomap_ops = {
-	.iomap_begin = ntfs_seek_iomap_begin,
-	.iomap_end = ntfs_zero_read_iomap_end,
+	.iomap_next = ntfs_zero_read_iomap_next,
 };
 
+static int ntfs_seek_iomap_next(const struct iomap_iter *iter,
+		struct iomap *iomap, struct iomap *srcmap)
+{
+	return iomap_process(iter, iomap, srcmap, ntfs_seek_iomap_begin, NULL);
+}
+
 const struct iomap_ops ntfs_seek_iomap_ops = {
-	.iomap_begin = ntfs_seek_iomap_begin,
+	.iomap_next = ntfs_seek_iomap_next,
 };
 
 int ntfs_dio_zero_range(struct inode *inode, loff_t offset, loff_t length)
@@ -764,9 +782,15 @@ static int ntfs_write_iomap_end(struct inode *inode, loff_t pos, loff_t length,
 	return written;
 }
 
+static int ntfs_write_iomap_next(const struct iomap_iter *iter,
+		struct iomap *iomap, struct iomap *srcmap)
+{
+	return iomap_process(iter, iomap, srcmap, ntfs_write_iomap_begin,
+			ntfs_write_iomap_end);
+}
+
 const struct iomap_ops ntfs_write_iomap_ops = {
-	.iomap_begin		= ntfs_write_iomap_begin,
-	.iomap_end		= ntfs_write_iomap_end,
+	.iomap_next		= ntfs_write_iomap_next,
 };
 
 static int ntfs_page_mkwrite_iomap_begin(struct inode *inode, loff_t offset,
@@ -777,9 +801,15 @@ static int ntfs_page_mkwrite_iomap_begin(struct inode *inode, loff_t offset,
 			NTFS_IOMAP_FLAGS_MKWRITE);
 }
 
+static int ntfs_page_mkwrite_iomap_next(const struct iomap_iter *iter,
+		struct iomap *iomap, struct iomap *srcmap)
+{
+	return iomap_process(iter, iomap, srcmap, ntfs_page_mkwrite_iomap_begin,
+			ntfs_write_iomap_end);
+}
+
 const struct iomap_ops ntfs_page_mkwrite_iomap_ops = {
-	.iomap_begin		= ntfs_page_mkwrite_iomap_begin,
-	.iomap_end		= ntfs_write_iomap_end,
+	.iomap_next		= ntfs_page_mkwrite_iomap_next,
 };
 
 static int ntfs_dio_iomap_begin(struct inode *inode, loff_t offset,
@@ -790,9 +820,15 @@ static int ntfs_dio_iomap_begin(struct inode *inode, loff_t offset,
 			NTFS_IOMAP_FLAGS_DIO);
 }
 
+static int ntfs_dio_iomap_next(const struct iomap_iter *iter,
+		struct iomap *iomap, struct iomap *srcmap)
+{
+	return iomap_process(iter, iomap, srcmap, ntfs_dio_iomap_begin,
+			ntfs_write_iomap_end);
+}
+
 const struct iomap_ops ntfs_dio_iomap_ops = {
-	.iomap_begin		= ntfs_dio_iomap_begin,
-	.iomap_end		= ntfs_write_iomap_end,
+	.iomap_next		= ntfs_dio_iomap_next,
 };
 
 static ssize_t ntfs_writeback_range(struct iomap_writepage_ctx *wpc,
-- 
2.52.0