From: Xiubo Li <xiubli@xxxxxxxxxx>
If the new size is the same with current size, the MDS will do nothing
except changing the mtime/atime. The posix doesn't mandate that the
filesystems must update them. So just ignore it.
Signed-off-by: Xiubo Li <xiubli@xxxxxxxxxx>
---
fs/ceph/inode.c | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index 23b5a0867e3a..81a7b342fae7 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -2105,12 +2105,14 @@ int __ceph_setattr(struct inode *inode, struct iattr *attr)
loff_t isize = i_size_read(inode);
dout("setattr %p size %lld -> %lld\n", inode, isize, attr->ia_size);
- if ((issued & CEPH_CAP_FILE_EXCL) && attr->ia_size > isize) {
- i_size_write(inode, attr->ia_size);
- inode->i_blocks = calc_inode_blocks(attr->ia_size);
- ci->i_reported_size = attr->ia_size;
- dirtied |= CEPH_CAP_FILE_EXCL;
- ia_valid |= ATTR_MTIME;
+ if ((issued & CEPH_CAP_FILE_EXCL) && attr->ia_size >= isize) {
+ if (attr->ia_size > isize) {
+ i_size_write(inode, attr->ia_size);
+ inode->i_blocks = calc_inode_blocks(attr->ia_size);
+ ci->i_reported_size = attr->ia_size;
+ dirtied |= CEPH_CAP_FILE_EXCL;
+ ia_valid |= ATTR_MTIME;
+ }
} else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
attr->ia_size != isize) {
req->r_args.setattr.size = cpu_to_le64(attr->ia_size);
--
2.27.0
