This series introduces changes Ceph File System mount device string.
Old mount device syntax (source) has the following problems:
mounts to the same cluster but with different fsnames
and/or creds have identical device string which can
confuse xfstests.
Userspace mount helper tool resolves monitor addresses
and fill in mon addrs automatically, but that means the
device shown in /proc/mounts is different than what was
used for mounting.
New device syntax is as follows:
cephuser@mycephfs2=/path
Note, there is no "monitor address" in the device string.
That gets passed in as mount option. This keeps the device
string same when monitor addresses change (on remounts).
Also note that the userspace mount helper tool is backward
compatible. I.e., the mount helper will fallback to using
old syntax after trying to mount with the new syntax.
The user space mount helper changes are here:
http://github.com/ceph/ceph/pull/41334
Venky Shankar (3):
ceph: new device mount syntax
ceph: record updated mon_addr on remount
doc: document new CephFS mount device syntax
Documentation/filesystems/ceph.rst | 16 +++++--
fs/ceph/super.c | 75 +++++++++++++++++++++---------
fs/ceph/super.h | 1 +
3 files changed, 67 insertions(+), 25 deletions(-)
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2.27.0
