libglusterfs: Implement cluster-syncop

        Backport of http://review.gluster.org/10240

This patch implements syncop equivalent for cluster of xlators. The xlators on
which the fop needs to be performed is taken in input arguments to the
functions and the responses are gathered and provided as the output.

This idea is taken from afr-v2 self-heal implementation by Avati.

BUG: 1216303
Change-Id: I189400ea5bb3205aae928a72afbb6c960968b65a
Signed-off-by: Pranith Kumar K <pkarampu@redhat.com>
Reviewed-on: http://review.gluster.org/10439
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>

1 files changed, 126 insertions, 0 deletions

diff --git a/libglusterfs/src/cluster-syncop.h b/libglusterfs/src/cluster-syncop.h
new file mode 100644
index 00000000000..2c94246ff1f
--- /dev/null
+++ b/libglusterfs/src/cluster-syncop.h
@@ -0,0 +1,126 @@
+/*
+  Copyright (c) 2015 Red Hat, Inc. <http://www.redhat.com>
+  This file is part of GlusterFS.
+
+  This file is licensed to you under your choice of the GNU Lesser
+  General Public License, version 3 or any later version (LGPLv3 or
+  later), or the GNU General Public License, version 2 (GPLv2), in all
+  cases as published by the Free Software Foundation.
+*/
+
+
+#ifndef _CLUSTER_SYNCOP_H
+#define _CLUSTER_SYNCOP_H
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include "xlator.h"
+#include <sys/time.h>
+#include <pthread.h>
+#include <ucontext.h>
+#include "defaults.h"
+#include "syncop.h"
+
+typedef struct cluster_local_ {
+        default_args_cbk_t *replies;
+        syncbarrier_t barrier;
+} cluster_local_t;
+
+int32_t
+cluster_lookup (xlator_t **subvols, unsigned char *on, int numsubvols,
+                default_args_cbk_t *replies, unsigned char *output,
+                call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *xdata);
+int32_t
+cluster_setattr (xlator_t **subvols, unsigned char *on, int numsubvols,
+                 default_args_cbk_t *replies, unsigned char *output,
+                 call_frame_t *frame, xlator_t *this, loc_t *loc,
+                 struct iatt *stbuf, int32_t valid, dict_t *xdata);
+int32_t
+cluster_getxattr (xlator_t **subvols, unsigned char *on, int numsubvols,
+                  default_args_cbk_t *replies, unsigned char *output,
+                  call_frame_t *frame, xlator_t *this, loc_t *loc,
+                  const char *name, dict_t *xdata);
+int32_t
+cluster_setxattr (xlator_t **subvols, unsigned char *on, int numsubvols,
+                  default_args_cbk_t *replies, unsigned char *output,
+                  call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *dict,
+                  int32_t flags, dict_t *xdata);
+
+int
+cluster_inodelk (xlator_t **subvols, unsigned char *on, int numsubvols,
+                 default_args_cbk_t *replies, unsigned char *locked_on,
+                 call_frame_t *frame, xlator_t *this, char *dom,
+                 inode_t *inode, off_t off, size_t size);
+
+int
+cluster_uninodelk (xlator_t **subvols, unsigned char *locked_on, int numsubvols,
+                   default_args_cbk_t *replies, unsigned char *output,
+                   call_frame_t *frame, xlator_t *this, char *dom,
+                   inode_t *inode, off_t off, size_t size);
+
+int
+cluster_entrylk (xlator_t **subvols, unsigned char *on, int numsubvols,
+                 default_args_cbk_t *replies, unsigned char *locked_on,
+                 call_frame_t *frame, xlator_t *this, char *dom,
+                 inode_t *inode, const char *name);
+
+int32_t
+cluster_rmdir (xlator_t **subvols, unsigned char *on, int numsubvols,
+               default_args_cbk_t *replies, unsigned char *output,
+               call_frame_t *frame, xlator_t *this, loc_t *loc, int flags,
+               dict_t *xdata);
+
+int32_t
+cluster_unlink (xlator_t **subvols, unsigned char *on, int numsubvols,
+                default_args_cbk_t *replies, unsigned char *output,
+                call_frame_t *frame, xlator_t *this, loc_t *loc, int xflag,
+                dict_t *xdata);
+
+int
+cluster_mkdir (xlator_t **subvols, unsigned char *on, int numsubvols,
+               default_args_cbk_t *replies, unsigned char *output,
+               call_frame_t *frame, xlator_t *this, loc_t *loc, mode_t mode,
+               mode_t umask, dict_t *xdata);
+
+int32_t
+cluster_readlink (xlator_t **subvols, unsigned char *on, int numsubvols,
+                  default_args_cbk_t *replies, unsigned char *output,
+                  call_frame_t *frame, xlator_t *this, loc_t *loc, size_t size,
+                  dict_t *xdata);
+
+int
+cluster_symlink (xlator_t **subvols, unsigned char *on, int numsubvols,
+                 default_args_cbk_t *replies, unsigned char *output,
+                 call_frame_t *frame, xlator_t *this, const char *linkpath,
+                 loc_t *loc, mode_t umask, dict_t *xdata);
+
+int32_t
+cluster_link (xlator_t **subvols, unsigned char *on, int numsubvols,
+              default_args_cbk_t *replies, unsigned char *output,
+              call_frame_t *frame, xlator_t *this, loc_t *oldloc, loc_t *newloc,
+              dict_t *xdata);
+
+int
+cluster_mknod (xlator_t **subvols, unsigned char *on, int numsubvols,
+               default_args_cbk_t *replies, unsigned char *output,
+               call_frame_t *frame, xlator_t *this, loc_t *loc, mode_t mode,
+               dev_t rdev, mode_t umask, dict_t *xdata);
+
+int
+cluster_unentrylk (xlator_t **subvols, unsigned char *locked_on, int numsubvols,
+                   default_args_cbk_t *replies, unsigned char *output,
+                   call_frame_t *frame, xlator_t *this, char *dom,
+                   inode_t *inode, const char *name);
+
+int
+cluster_tryentrylk (xlator_t **subvols, unsigned char *on, int numsubvols,
+                    default_args_cbk_t *replies, unsigned char *locked_on,
+                    call_frame_t *frame, xlator_t *this, char *dom,
+                    inode_t *inode, const char *name);
+
+void
+cluster_replies_wipe (default_args_cbk_t *replies, int num_subvols);
+#endif /* !_CLUSTER_SYNCOP_H */