For regular file which has been written, it can't change layout.
So it can get layout from local rather than mds.
Signed-off-by: Jianpeng Ma <majianpeng@xxxxxxxxx>
---
fs/ceph/ioctl.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/fs/ceph/ioctl.c b/fs/ceph/ioctl.c
index e0b4ef3..2b74879 100644
--- a/fs/ceph/ioctl.c
+++ b/fs/ceph/ioctl.c
@@ -17,10 +17,16 @@
static long ceph_ioctl_get_layout(struct file *file, void __user *arg)
{
struct ceph_inode_info *ci = ceph_inode(file_inode(file));
+ struct inode *inode = file_inode(file);
struct ceph_ioctl_layout l;
- int err;
+ int err = 0;
+
+ /*For regular file which has been written,it can't change layout
+ * So it don't get layout from mds*/
+ if (!(S_ISREG(inode->i_mode) && (i_size_read(inode) > 0 ||
+ ci->i_truncate_seq > 1)))
+ err = ceph_do_getattr(file_inode(file), CEPH_STAT_CAP_LAYOUT);
- err = ceph_do_getattr(file_inode(file), CEPH_STAT_CAP_LAYOUT);
if (!err) {
l.stripe_unit = ceph_file_layout_su(ci->i_layout);
l.stripe_count = ceph_file_layout_stripe_count(ci->i_layout);
--
1.8.1.2
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