Merge PR #36457 into master

* refs/pull/36457/head:
	qa/tasks/cephfs: fix fs authorize cmd args
	mds: add root_squash mode in MDS auth caps
	vstart_runner: add write_file and sudo_write_file

Reviewed-by: Patrick Donnelly <pdonnell@redhat.com>

diff --cc PendingReleaseNotes
index 9f989e0e5f25b63b04821b95d68b24f57fe5fa5a,e25c8319fee152b2f596375867df7e79fcc44146..32e8b0addbd7c6fbf159cc3073177cacd1c390b6
--- 1/PendingReleaseNotes
--- 2/PendingReleaseNotes
+++ b/PendingReleaseNotes
@@@ -178,9 -158,9 +178,13 @@@
    ``fsname`` in caps. This also affects subcommand ``fs authorize``, the caps
    produce by it will be specific to the FS name passed in its arguments.
  
+ * fs: root_squash flag can be set in MDS caps. It disallows file system
+   operations that need write access for clients with uid=0 or gid=0. This
+   feature should prevent accidents such as an inadvertent `sudo rm -rf /<path>`.
+ 
  * fs: "fs authorize" now sets MON cap to "allow <perm> fsname=<fsname>"
        instead of setting it to "allow r" all the time.
 +
 +* ``ceph pg #.# list_unfound`` output has been enhanced to provide
 +  might_have_unfound information which indicates which OSDs may
 +  contain the unfound objects.

diff --cc qa/tasks/vstart_runner.py
Simple merge