ceph: update i_max_size even if inode version does not change

handle following sequence of events:
 - client releases a inode with i_max_size > 0. The release message
   is queued. (is not sent to the auth MDS)
 - a 'lookup' request reply from non-auth MDS returns the same inode.
 - client opens the inode in write mode. The version of inode trace
   in 'open' request reply is equal to the cached inode's version.
 - client requests new max size. The MDS ignores the request because
   it does not affect client's write range

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Reviewed-by: Sage Weil <sage@inktank.com>

diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index 91d6c9d..1a37ee7 100644 (file)
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -659,14 +659,6 @@ static int fill_inode(struct inode *inode,
                            le32_to_cpu(info->time_warp_seq),
                            &ctime, &mtime, &atime);
 
-       /* only update max_size on auth cap */
-       if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) &&
-           ci->i_max_size != le64_to_cpu(info->max_size)) {
-               dout("max_size %lld -> %llu\n", ci->i_max_size,
-                    le64_to_cpu(info->max_size));
-               ci->i_max_size = le64_to_cpu(info->max_size);
-       }
-
        ci->i_layout = info->layout;
        inode->i_blkbits = fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1;
 
@@ -755,6 +747,14 @@ static int fill_inode(struct inode *inode,
                ci->i_max_offset = 2;
        }
 no_change:
+       /* only update max_size on auth cap */
+       if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) &&
+           ci->i_max_size != le64_to_cpu(info->max_size)) {
+               dout("max_size %lld -> %llu\n", ci->i_max_size,
+                    le64_to_cpu(info->max_size));
+               ci->i_max_size = le64_to_cpu(info->max_size);
+       }
+
        spin_unlock(&ci->i_ceph_lock);
 
        /* queue truncate if we saw i_size decrease */