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authorLinus Torvalds <torvalds@linux-foundation.org>2018-08-14 08:29:03 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2018-08-14 08:29:03 +0300
commit161fa27ff2e2fd4ea7ccb660184670eab2b6ea98 (patch)
tree31e3403f1398171d2ed32d534640dfad67ce832a /include
parenta1a4f841ec4585185c0e75bfae43a18b282dd316 (diff)
parent806a1477b10a153cd01ee7ccba8ca2492df3e0b2 (diff)
downloadlinux-161fa27ff2e2fd4ea7ccb660184670eab2b6ea98.tar.xz
Merge branch 'iomap-4.19-merge' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Pull fs iomap refactoring from Darrick Wong: "This is the first part of the XFS changes for 4.19. Christoph and Andreas coordinated some refactoring work on the iomap code in preparation for removing buffer heads from XFS and porting gfs2 to iomap. I'm sending this small pull request ahead of the main XFS merge to avoid holding up gfs2 unnecessarily" * 'iomap-4.19-merge' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: iomap: add inline data support to iomap_readpage_actor iomap: support direct I/O to inline data iomap: refactor iomap_dio_actor iomap: add initial support for writes without buffer heads iomap: add an iomap-based readpage and readpages implementation iomap: add private pointer to struct iomap iomap: add a page_done callback iomap: generic inline data handling iomap: complete partial direct I/O writes synchronously iomap: mark newly allocated buffer heads as new fs: factor out a __generic_write_end helper
Diffstat (limited to 'include')
-rw-r--r--include/linux/iomap.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/iomap.h b/include/linux/iomap.h
index a044a824da85..5eb9ca8d7ce5 100644
--- a/include/linux/iomap.h
+++ b/include/linux/iomap.h
@@ -9,6 +9,7 @@ struct fiemap_extent_info;
struct inode;
struct iov_iter;
struct kiocb;
+struct page;
struct vm_area_struct;
struct vm_fault;
@@ -29,6 +30,7 @@ struct vm_fault;
*/
#define IOMAP_F_NEW 0x01 /* blocks have been newly allocated */
#define IOMAP_F_DIRTY 0x02 /* uncommitted metadata */
+#define IOMAP_F_BUFFER_HEAD 0x04 /* file system requires buffer heads */
/*
* Flags that only need to be reported for IOMAP_REPORT requests:
@@ -55,6 +57,16 @@ struct iomap {
u16 flags; /* flags for mapping */
struct block_device *bdev; /* block device for I/O */
struct dax_device *dax_dev; /* dax_dev for dax operations */
+ void *inline_data;
+ void *private; /* filesystem private */
+
+ /*
+ * Called when finished processing a page in the mapping returned in
+ * this iomap. At least for now this is only supported in the buffered
+ * write path.
+ */
+ void (*page_done)(struct inode *inode, loff_t pos, unsigned copied,
+ struct page *page, struct iomap *iomap);
};
/*
@@ -88,6 +100,10 @@ struct iomap_ops {
ssize_t iomap_file_buffered_write(struct kiocb *iocb, struct iov_iter *from,
const struct iomap_ops *ops);
+int iomap_readpage(struct page *page, const struct iomap_ops *ops);
+int iomap_readpages(struct address_space *mapping, struct list_head *pages,
+ unsigned nr_pages, const struct iomap_ops *ops);
+int iomap_set_page_dirty(struct page *page);
int iomap_file_dirty(struct inode *inode, loff_t pos, loff_t len,
const struct iomap_ops *ops);
int iomap_zero_range(struct inode *inode, loff_t pos, loff_t len,