I am working on some fairly big changes to the ceph/RADOS client
messenger code. The ultimate goal is to simplify the code by
having it more obviously follow a state machine, but getting to
that point isn't necessarily easy.
My approach is to make evolutionary changes, making a long series
of small changes, each of which either produces code that works
identical to before, or which very explicitly fixes a bug or adds
or modifies a feature while continuing to provide functionality
that is equivalent and/or meets what is required.
This series contains a few small batches of changes to begin this
process. In general they're dependent on each other, so they are
being provided in one series, but I group them below into some
smaller logical subsets.
-Alex
[PATCH 01/13] libceph: eliminate connection state "DEAD"
[PATCH 02/13] libceph: kill bad_proto ceph connection op
[PATCH 03/13] libceph: delete useless SOCK_CLOSED manipulations
These three delete dead/unused code
[PATCH 04/13] libceph: rename socket callbacks
[PATCH 05/13] libceph: rename kvec_reset and kvec_add functions
These two simply rename some symbols.
[PATCH 06/13] libceph: embed ceph messenger structure in ceph_client
[PATCH 07/13] libceph: embed ceph connection structure in mon_client
These two each change a structure definition so that what was
once a pointer to a structure becomes instead an embedded
structure of the pointed-to type. Doing this makes it obvious
that the relationship between the containing structure and the
embedded one is purely one-to-one.
[PATCH 08/13] libceph: start separating connection flags from state
This identifies a set of values kept in the "state" field and
records them instead in a new "flags" field, so it is obvious
the role each plays (whether it's a state diagram state, or
whether it's a Boolean flag).
[PATCH 09/13] libceph: start tracking connection socket state
This adds code to explicitly track the state of the socket
used by a ceph connection. It begins the process of trying
to clean up some fuzziness in how the overall state of a
ceph connection is tracked.
[PATCH 10/13] libceph: provide osd number when creating osd
[PATCH 11/13] libceph: init monitor connection when opening
[PATCH 12/13] libceph: fully initialize connection in con_init()
[PATCH 13/13] libceph: set CLOSED state bit in con_init
This series moves things around a bit so that all ceph
connection initialization is done at one time, by code
defined with the "net/ceph/messenger.c" source file. It
also makes explicit that a newly initialized ceph connection
is in CLOSED state.
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