Merge pull request #58350 from chrisphoffman/wip-66732-reef

reef: mds: Implement remove for ceph vxattrs

diff --cc PendingReleaseNotes
index 33101674c565d002274ee436f157fee65d8fac1a,30c9b4f8206267ea566833a0c310ff8cf30c0ebc..1e2cbee36195874de6a4d51169ac706011e20db0
--- 1/PendingReleaseNotes
--- 2/PendingReleaseNotes
+++ b/PendingReleaseNotes
@@@ -132,12 -132,11 +132,16 @@@
    without this feature will trigger the MDS to raise a HEALTH_ERR on the
    cluster, MDS_CLIENTS_BROKEN_ROOTSQUASH. See the documentation on this warning
    and the new feature bit for more information.
+ * CephFS: Expanded removexattr support for cephfs virtual extended attributes.
+   Previously one had to use setxattr to restore the default in order to "remove".
+   You may now properly use removexattr to remove. You can also now remove layout
+   on root inode, which then will restore layout to default layout.
  
 +* cls_cxx_gather is marked as deprecated.
 +* CephFS: cephfs-journal-tool is guarded against running on an online file system.
 +  The 'cephfs-journal-tool --rank <fs_name>:<mds_rank> journal reset' and
 +  'cephfs-journal-tool --rank <fs_name>:<mds_rank> journal reset --force'
 +  commands require '--yes-i-really-really-mean-it'.
  
  * CephFS: Command "ceph mds fail" and "ceph fs fail" now requires a
    confirmation flag when some MDSs exhibit health warning MDS_TRIM or

diff --cc src/mds/Server.cc
Simple merge

diff --cc src/mds/Server.h
Simple merge