mds: SnapInfo, snaplink_t, sr_t now use modern encoding

This commit doesn't enable the dencoder integration due
to some build and compile issues, but we'll turn it
on later.

Signed-off-by: Sage Weil <sage@inktank.com>
Signed-off-by: Greg Farnum <greg@inktank.com>
client: rename client/SnapRealm files to avoid automake build conflict

We are about to move the MDS' SnapRealm into its own files, which conflicts.
The MDS is more important, so it wins the "SnapRealm" filename and we
move the client stuff to ClientSnapRealm.[h|cc].

Signed-off-by: Sage Weil <sage@inktank.com>
Signed-off-by: Greg Farnum <greg@inktank.com>
mds: move SnapRealm into its own h/cc files

Signed-off-by: Sage Weil <sage@inktank.com>
mds: inode_back{trace,pointer}_t now uses modern encoding

Signed-off-by: Sage Weil <sage@inktank.com>
Signed-off-by: Greg Farnum <greg@inktank.com>
mds: default_file_layout now uses modern encoding

And move implementations into mdstypes.cc from CInode and common/types.
mdstypes.cc sadly lives in libcommon; as several of the types we're going
to put there are needed for Messages and similar things.

Signed-off-by: Sage Weil <sage@inktank.com>
Signed-off-by: Greg Farnum <greg@inktank.com>
mds: frag_info_t now uses modern encoding

Signed-off-by: Sage Weil <sage@inktank.com>
mds: rename struct default_file_layout to file_layout_policy_t

Signed-off-by: Sage Weil <sage@inktank.com>
Signed-off-by: Greg Farnum <greg@inktank.com>
mds: nest_info_t now uses modern encoding

Signed-off-by: Sage Weil <sage@inktank.com>
Signed-off-by: Greg Farnum <greg@inktank.com>
mds: client_writeable_range_t now uses modern encoding

Signed-off-by: Sage Weil <sage@inktank.com>
Signed-off-by: Greg Farnum <greg@inktank.com>
mds: fold byte_range_t into client_writeable_range_t

As part of this, fold byte_range_t into it as a sub-struct
and eliminate its free-standing functions (it's too small
to live alone).

Signed-off-by: Greg Farnum <greg@inktank.com>
mds: inode_t now uses modern encoding

And we move implementations and the dumper into mdstypes.cc (from
mdstypes.h and common/types.cc).

Signed-off-by: Sage Weil <sage@inktank.com>
Signed-off-by: Greg Farnum <greg@inktank.com>
remove common/types.cc

It no longer has a purpose; the functions it used to host are now
implemented in mds/mdstypes.cc and more properly belong there
anyway.

Signed-off-by: Greg Farnum <greg@inktank.com>
mds: old_inode_t now uses modern encoding

Signed-off-by: Sage Weil <sage@inktank.com>
Signed-off-by: Greg Farnum <greg@inktank.com>
mds: fnode_t now uses modern encoding

Signed-off-by: Sage Weil <sage@inktank.com>
Signed-off-by: Greg Farnum <greg@inktank.com>
mds: move durable Session bits into session_info_t

This keeps the on-disk structure explicitly separate from the in-memory
functional stuff.

Signed-off-by: Sage Weil <sage@inktank.com>
Signed-off-by: Greg Farnum <greg@inktank.com>
mds: session_info_t now uses modern encoding

Signed-off-by: Sage Weil <sage@inktank.com>
Signed-off-by: Greg Farnum <greg@inktank.com>
mds: string_snap_t now uses modern encoding

Signed-off-by: Sage Weil <sage@inktank.com>
Signed-off-by: Greg Farnum <greg@inktank.com>
mds: MDSCacheObjectInfo now uses modern encoding

Signed-off-by: Sage Weil <sage@inktank.com>
mds: rename MDSTableServer::_pending to mds_table_pending_t

And move it from MDSTableServer into mdstypes.cc, so we can use it
in ceph-dencoder more gracefully (coming up next!).

Signed-off-by: Greg Farnum <greg@inktank.com>
mds: mds_table_pending_t now uses modern encoding

Signed-off-by: Sage Weil <sage@inktank.com>
Signed-off-by: Greg Farnum <greg@inktank.com>