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authorLinus Torvalds <torvalds@linux-foundation.org>2019-07-19 11:38:12 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-07-19 11:38:12 -0700
commit26473f83703e6bc56114ce4b045000de6efcfff7 (patch)
tree37d46313cc36f373c84c2a95e804d2342d6f33d6 /include
parent4f5ed1318c0108369a76f4a56242fbeea537abe9 (diff)
parent5d907307adc14cd5148b07629c2b4535acd06062 (diff)
Merge tag 'iomap-5.3-merge-4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Pull iomap split/cleanup from Darrick Wong: "As promised, here's the second part of the iomap merge for 5.3, in which we break up iomap.c into smaller files grouped by functional area so that it'll be easier in the long run to maintain cohesiveness of code units and to review incoming patches. There are no functional changes and fs/iomap.c split cleanly. Summary: - Regroup the fs/iomap.c code by major functional area so that we can start development for 5.4 from a more stable base" * tag 'iomap-5.3-merge-4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: iomap: move internal declarations into fs/iomap/ iomap: move the main iteration code into a separate file iomap: move the buffered IO code into a separate file iomap: move the direct IO code into a separate file iomap: move the SEEK_HOLE code into a separate file iomap: move the file mapping reporting code into a separate file iomap: move the swapfile code into a separate file iomap: start moving code to fs/iomap/
Diffstat (limited to 'include')
-rw-r--r--include/linux/iomap.h17
1 files changed, 17 insertions, 0 deletions
diff --git a/include/linux/iomap.h b/include/linux/iomap.h
index 1df9ea187a9a..bc499ceae392 100644
--- a/include/linux/iomap.h
+++ b/include/linux/iomap.h
@@ -7,6 +7,7 @@
#include <linux/mm.h>
#include <linux/types.h>
#include <linux/mm_types.h>
+#include <linux/blkdev.h>
struct address_space;
struct fiemap_extent_info;
@@ -69,6 +70,12 @@ struct iomap {
const struct iomap_page_ops *page_ops;
};
+static inline sector_t
+iomap_sector(struct iomap *iomap, loff_t pos)
+{
+ return (iomap->addr + pos - iomap->offset) >> SECTOR_SHIFT;
+}
+
/*
* When a filesystem sets page_ops in an iomap mapping it returns, page_prepare
* and page_done will be called for each page written to. This only applies to
@@ -116,6 +123,16 @@ struct iomap_ops {
};
/*
+ * Main iomap iterator function.
+ */
+typedef loff_t (*iomap_actor_t)(struct inode *inode, loff_t pos, loff_t len,
+ void *data, struct iomap *iomap);
+
+loff_t iomap_apply(struct inode *inode, loff_t pos, loff_t length,
+ unsigned flags, const struct iomap_ops *ops, void *data,
+ iomap_actor_t actor);
+
+/*
* Structure allocate for each page when block size < PAGE_SIZE to track
* sub-page uptodate status and I/O completions.
*/