[PATCH TRIVIVAL] ceph: Move the place for EOLDSNAPC handle in ceph_aio_write to easily understand

[majianpeng <majianpeng@gmail.com>]

Only for ceph_sync_write, the osd can return EOLDSNAPC.so move the
related codes after the call ceph_sync_write.

Signed-off-by: Jianpeng Ma <majianpeng@gmail.com>
---
 fs/ceph/file.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 2ddf061..30e959f 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -768,6 +768,15 @@ retry_snap:
 		mutex_unlock(&inode->i_mutex);
 		written = ceph_sync_write(file, iov->iov_base, count,
 					  pos, &iocb->ki_pos);
+		if (written == -EOLDSNAPC) {
+			dout("aio_write %p %llx.%llx %llu~%u"
+				"got EOLDSNAPC, retrying\n",
+				inode, ceph_vinop(inode),
+				pos, (unsigned)iov->iov_len);
+			mutex_lock(&inode->i_mutex);
+			hold_mutex = true;
+			goto retry_snap;
+		}
 	} else {
 		written = generic_file_buffered_write(iocb, iov, nr_segs,
 						      pos, &iocb->ki_pos,
@@ -797,14 +806,7 @@ retry_snap:
 		if (err < 0)
 			written = err;
 	}
-
-	if (written == -EOLDSNAPC) {
-		dout("aio_write %p %llx.%llx %llu~%u got EOLDSNAPC, retrying\n",
-		     inode, ceph_vinop(inode), pos, (unsigned)iov->iov_len);
-		mutex_lock(&inode->i_mutex);
-		hold_mutex = true;
-		goto retry_snap;
-	}
+
 out:
 	if (hold_mutex)
 		mutex_unlock(&inode->i_mutex);
-- 
1.8.3.rc1.44.gb387c77