Use the new iomap support to handle direct IO writes.
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
---
fs/jfs/file.c | 36 +++++++++++++++++++++++++++++++++++-
1 file changed, 35 insertions(+), 1 deletion(-)
diff --git a/fs/jfs/file.c b/fs/jfs/file.c
index 0d074a9e0f77..bf9d4475ddb5 100644
--- a/fs/jfs/file.c
+++ b/fs/jfs/file.c
@@ -4,6 +4,7 @@
* Portions Copyright (C) Christoph Hellwig, 2001-2002
*/
+#include <linux/backing-dev.h>
#include <linux/fs.h>
#include <linux/iomap.h>
#include <linux/mm.h>
@@ -86,6 +87,39 @@ static ssize_t jfs_read_iter(struct kiocb *iocb, struct iov_iter *to)
return generic_file_read_iter(iocb, to);
}
+static ssize_t jfs_write_iter(struct kiocb *iocb, struct iov_iter *from)
+{
+ struct file *file = iocb->ki_filp;
+ struct inode *inode = file->f_mapping->host;
+ ssize_t ret;
+
+ inode_lock(inode);
+ current->backing_dev_info = inode_to_bdi(inode);
+
+ ret = generic_write_checks(iocb, from);
+ if (ret <= 0)
+ goto err;
+ ret = file_remove_privs(file);
+ if (ret < 0)
+ goto err;
+ ret = file_update_time(file);
+ if (ret < 0)
+ goto err;
+
+ if (iocb->ki_flags & IOCB_DIRECT)
+ ret = iomap_dio_rw(iocb, from, &jfs_iomap_ops, NULL,
+ IOMAP_DIO_NOSYNC, NULL, 0);
+ else
+ ret = __generic_file_write_iter(iocb, from);
+
+err:
+ current->backing_dev_info = NULL;
+ inode_unlock(inode);
+ if (ret > 0)
+ ret = generic_write_sync(iocb, ret);
+ return ret;
+}
+
static int jfs_release(struct inode *inode, struct file *file)
{
struct jfs_inode_info *ji = JFS_IP(inode);
@@ -158,7 +192,7 @@ const struct file_operations jfs_file_operations = {
.open = jfs_open,
.llseek = generic_file_llseek,
.read_iter = jfs_read_iter,
- .write_iter = generic_file_write_iter,
+ .write_iter = jfs_write_iter,
.mmap = generic_file_mmap,
.splice_read = generic_file_splice_read,
.splice_write = iter_file_splice_write,
--
2.34.1
