posix: Reorganize posix xlator to prepare for reuse with rio

1. Split out entry and inode/fd based FOPs into
separate files from posix.c
2. Split out common routines (init, fini, reconf,
and such) into its own file, from posix.c
3. Retain just the method assignments in posix.c
(such that posix2 for RIO can assign its own methods in
the future for entry operations and such)
4. Based on the split in (1) and (2) split out
posix-handle.h into 2 files, such that macros that are
needed for inode ops are in one and rest are in the other

If the split is done as above, posix2 can compile with
its own entry ops, and hence not compile, the entry ops
as split in (1) above.

The split described in (4) can again help posix2 to
define its own macros to make entry and inode handles,
thus not impact existing POSIX xlator code.

Noted problems
- There are path references in certain cases where
quota is used (in the xattr FOPs), and thus will fail
on reuse in posix2, this needs to be handled when we
get there.
- posix_init does set root GFID on the brick root,
and this is incorrect for posix2, again will need
handling later when posix2 evolves based on this
code (other init checks seem fine on current inspection)

Merge of experimental branch patches with the following
gerrit change-IDs
> Change-Id: I965ce6dffe70a62c697f790f3438559520e0af20
> Change-Id: I089a4d9cf470c2f9c121611e8ef18dea92b2be70
> Change-Id: I2cec103f6ba8f3084443f3066bcc70b2f5ecb49a

Fixes gluster/glusterfs#327

Change-Id: I0ccfa78559a7c5a68f5e861e144cf856f5c9e19c
Signed-off-by: ShyamsundarR <srangana@redhat.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/xlators/storage/posix/src/Makefile.am b/xlators/storage/posix/src/Makefile.am
index 8ec460578b5..17ea98016c9 100644
--- a/xlators/storage/posix/src/Makefile.am
+++ b/xlators/storage/posix/src/Makefile.am
@@ -5,12 +5,13 @@ xlatordir = $(libdir)/glusterfs/$(PACKAGE_VERSION)/xlator/storage
 posix_la_LDFLAGS = -module $(GF_XLATOR_DEFAULT_LDFLAGS)
 
 posix_la_SOURCES = posix.c posix-helpers.c posix-handle.c posix-aio.c \
-	posix-gfid-path.c
+	posix-gfid-path.c posix-entry-ops.c posix-inode-fd-ops.c \
+        posix-common.c
 posix_la_LIBADD = $(top_builddir)/libglusterfs/src/libglusterfs.la $(LIBAIO) \
 	$(ACL_LIBS)
 
 noinst_HEADERS = posix.h posix-mem-types.h posix-handle.h posix-aio.h \
-	posix-messages.h posix-gfid-path.h
+	posix-messages.h posix-gfid-path.h posix-inode-handle.h
 
 AM_CPPFLAGS = $(GF_CPPFLAGS) -I$(top_srcdir)/libglusterfs/src \
 	-I$(top_srcdir)/rpc/xdr/src -I$(top_builddir)/rpc/xdr/src \