From: Bob Peterson <rpeterso@xxxxxxxxxx>
Add function iomap_uninline_inode for converting an inline inode into a
non-inline inode. This takes care of attaching a new iomap_page object
to page->private if the block size is smaller than the page size.
Signed-off-by: Andreas Gruenbacher <agruenba@xxxxxxxxxx>
---
fs/iomap/buffered-io.c | 24 ++++++++++++++++++++++++
include/linux/iomap.h | 2 ++
2 files changed, 26 insertions(+)
diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index 03537ecb2a94..44acb59191b2 100644
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c
@@ -226,6 +226,30 @@ iomap_read_inline_data(struct inode *inode, struct page *page,
SetPageUptodate(page);
}
+int iomap_uninline_inode(struct inode *inode,
+ int (*uninline)(struct inode *, struct page *))
+{
+ struct page *page = NULL;
+ int ret;
+
+ if (i_size_read(inode)) {
+ page = find_or_create_page(inode->i_mapping, 0, GFP_NOFS);
+ if (!page)
+ return -ENOMEM;
+ }
+ ret = uninline(inode, page);
+ if (page) {
+ if (PageUptodate(page)) {
+ iomap_page_create(inode, page);
+ iomap_set_range_uptodate(page, 0, PAGE_SIZE);
+ }
+ unlock_page(page);
+ put_page(page);
+ }
+ return ret;
+}
+EXPORT_SYMBOL_GPL(iomap_uninline_inode);
+
static inline bool iomap_block_needs_zeroing(struct inode *inode,
struct iomap *iomap, loff_t pos)
{
diff --git a/include/linux/iomap.h b/include/linux/iomap.h
index c87d0cb0de6d..90c924eec09b 100644
--- a/include/linux/iomap.h
+++ b/include/linux/iomap.h
@@ -157,6 +157,8 @@ loff_t iomap_apply(struct inode *inode, loff_t pos, loff_t length,
ssize_t iomap_file_buffered_write(struct kiocb *iocb, struct iov_iter *from,
const struct iomap_ops *ops);
+int iomap_uninline_inode(struct inode *inode,
+ int (*uninline)(struct inode *, struct page *));
int iomap_readpage(struct page *page, const struct iomap_ops *ops);
void iomap_readahead(struct readahead_control *, const struct iomap_ops *ops);
int iomap_set_page_dirty(struct page *page);
--
2.26.3
