Copy generic_file_aio_write() into ext4_file_write(). This is part of
a patch series which allows us to simplify ext4_file_write() and
ext4_file_dio_write(), by calling __generic_file_aio_write() directly.
Signed-off-by: "Theodore Ts'o" <tytso@xxxxxxx>
---
fs/ext4/file.c | 21 +++++++++++++++++----
1 file changed, 17 insertions(+), 4 deletions(-)
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 25a20b6..8b22556 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -113,8 +113,6 @@ ext4_file_dio_write(struct kiocb *iocb, const struct iovec *iov,
ext4_unwritten_wait(inode);
}
- BUG_ON(iocb->ki_pos != pos);
-
mutex_lock(&inode->i_mutex);
blk_start_plug(&plug);
@@ -168,9 +166,12 @@ static ssize_t
ext4_file_write(struct kiocb *iocb, const struct iovec *iov,
unsigned long nr_segs, loff_t pos)
{
+ struct file *file = iocb->ki_filp;
struct inode *inode = file_inode(iocb->ki_filp);
ssize_t ret;
+ BUG_ON(iocb->ki_pos != pos);
+
/*
* If we have encountered a bitmap-format file, the size limit
* is smaller than s_maxbytes, which is for extent-mapped files.
@@ -192,8 +193,20 @@ ext4_file_write(struct kiocb *iocb, const struct iovec *iov,
if (unlikely(iocb->ki_filp->f_flags & O_DIRECT))
ret = ext4_file_dio_write(iocb, iov, nr_segs, pos);
- else
- ret = generic_file_aio_write(iocb, iov, nr_segs, pos);
+ else {
+ mutex_lock(&inode->i_mutex);
+ ret = __generic_file_aio_write(iocb, iov, nr_segs,
+ &iocb->ki_pos);
+ mutex_unlock(&inode->i_mutex);
+
+ if (ret > 0) {
+ ssize_t err;
+
+ err = generic_write_sync(file, iocb->ki_pos - ret, ret);
+ if (err < 0)
+ ret = err;
+ }
+ }
return ret;
}
--
1.9.0
--
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