From: Christoph Hellwig <hch@lst.de>
Date: Tue, 10 Aug 2021 18:33:08 -0700
Subject: [PATCH] iomap: switch iomap_file_buffered_write to use iomap_iter
Git-commit: ce83a0251c6ec2152f3449484d22e87f467c4a66
Patch-mainline: v5.15-rc1
References: jsc#PED-1183
Switch iomap_file_buffered_write to use iomap_iter.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Acked-by: Hannes Reinecke <hare@suse.com>
---
fs/iomap/buffered-io.c | 49 +++++++++++++++++++++---------------------
1 file changed, 25 insertions(+), 24 deletions(-)
diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index 32d80350bb55..a151b3b49038 100644
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c
@@ -726,13 +726,14 @@ static size_t iomap_write_end(struct inode *inode, loff_t pos, size_t len,
return ret;
}
-static loff_t
-iomap_write_actor(struct inode *inode, loff_t pos, loff_t length, void *data,
- struct iomap *iomap, struct iomap *srcmap)
+static loff_t iomap_write_iter(struct iomap_iter *iter, struct iov_iter *i)
{
- struct iov_iter *i = data;
- long status = 0;
+ struct iomap *srcmap = iomap_iter_srcmap(iter);
+ struct iomap *iomap = &iter->iomap;
+ loff_t length = iomap_length(iter);
+ loff_t pos = iter->pos;
ssize_t written = 0;
+ long status = 0;
do {
struct page *page;
@@ -758,18 +759,18 @@ iomap_write_actor(struct inode *inode, loff_t pos, loff_t length, void *data,
break;
}
- status = iomap_write_begin(inode, pos, bytes, 0, &page, iomap,
- srcmap);
+ status = iomap_write_begin(iter->inode, pos, bytes, 0, &page,
+ iomap, srcmap);
if (unlikely(status))
break;
- if (mapping_writably_mapped(inode->i_mapping))
+ if (mapping_writably_mapped(iter->inode->i_mapping))
flush_dcache_page(page);
copied = copy_page_from_iter_atomic(page, offset, bytes, i);
- status = iomap_write_end(inode, pos, bytes, copied, page, iomap,
- srcmap);
+ status = iomap_write_end(iter->inode, pos, bytes, copied, page,
+ iomap, srcmap);
if (unlikely(copied != status))
iov_iter_revert(i, copied - status);
@@ -790,29 +791,29 @@ iomap_write_actor(struct inode *inode, loff_t pos, loff_t length, void *data,
written += status;
length -= status;
- balance_dirty_pages_ratelimited(inode->i_mapping);
+ balance_dirty_pages_ratelimited(iter->inode->i_mapping);
} while (iov_iter_count(i) && length);
return written ? written : status;
}
ssize_t
-iomap_file_buffered_write(struct kiocb *iocb, struct iov_iter *iter,
+iomap_file_buffered_write(struct kiocb *iocb, struct iov_iter *i,
const struct iomap_ops *ops)
{
- struct inode *inode = iocb->ki_filp->f_mapping->host;
- loff_t pos = iocb->ki_pos, ret = 0, written = 0;
-
- while (iov_iter_count(iter)) {
- ret = iomap_apply(inode, pos, iov_iter_count(iter),
- IOMAP_WRITE, ops, iter, iomap_write_actor);
- if (ret <= 0)
- break;
- pos += ret;
- written += ret;
- }
+ struct iomap_iter iter = {
+ .inode = iocb->ki_filp->f_mapping->host,
+ .pos = iocb->ki_pos,
+ .len = iov_iter_count(i),
+ .flags = IOMAP_WRITE,
+ };
+ int ret;
- return written ? written : ret;
+ while ((ret = iomap_iter(&iter, ops)) > 0)
+ iter.processed = iomap_write_iter(&iter, i);
+ if (iter.pos == iocb->ki_pos)
+ return ret;
+ return iter.pos - iocb->ki_pos;
}
EXPORT_SYMBOL_GPL(iomap_file_buffered_write);
--
2.35.3