replace: add replace feature

1. create conf in new node
2. delete conf from old node
3. replace portals from nodes hosting other paths (HA)

$ gluster-block create sample/block ha 3 192.168.124.57,192.168.124.26,192.168.124.30 1GiB --json-pretty
{
  "IQN":"iqn.2016-12.org.gluster-block:d516bb5c-5f56-4d9c-96a7-385df19c2e2c",
  "PORTAL(S)":[
    "192.168.124.57:3260",
    "192.168.124.26:3260",
    "192.168.124.30:3260"
  ],
  "RESULT":"SUCCESS"
}

$ gluster-block help
gluster-block (0.3)
usage:
  gluster-block <command> <volname[/blockname]> [<args>] [--json*]

commands:
[...]
  replace <volname/blockname> <old-node> <new-node> [force]
        replace operations.
[...]

supported JSON formats:
  --json|--json-plain|--json-spaced|--json-pretty

$ gluster-block replace sample/block 192.168.124.26 192.168.124.56 --json-pretty
{
  "NAME":"block",
  "CREATE SUCCESS":"192.168.124.56",
  "DELETE SUCCESS":"192.168.124.26",
  "REPLACE PORTAL SUCCESS ON":[
    "192.168.124.57",
    "192.168.124.30"
  ],
  "RESULT":"SUCCESS"
}

Fixes: #4
Change-Id: I0411d15c407111db0d423052d9a6bc075174bf90
Signed-off-by: Prasanna Kumar Kalever <prasanna.kalever@redhat.com>

1 files changed, 40 insertions, 0 deletions

diff --git a/utils/common.c b/utils/common.c
index 98cc0ef..751e2b8 100644
--- a/utils/common.c
+++ b/utils/common.c
@@ -157,3 +157,43 @@ convertStringToTrillianParse(const char *opt)
 
   return -1;
 }
+
+
+void
+blockServerDefFree(blockServerDefPtr blkServers)
+{
+  size_t i;
+
+
+  if (!blkServers) {
+    return;
+  }
+
+  for (i = 0; i < blkServers->nhosts; i++) {
+     GB_FREE(blkServers->hosts[i]);
+  }
+  GB_FREE(blkServers->hosts);
+  GB_FREE(blkServers);
+}
+
+
+bool
+blockhostIsValid(char *status)
+{
+  switch (blockMetaStatusEnumParse(status)) {
+  case GB_CONFIG_SUCCESS:
+  case GB_CLEANUP_INPROGRESS:
+  case GB_AUTH_ENFORCEING:
+  case GB_AUTH_ENFORCED:
+  case GB_AUTH_ENFORCE_FAIL:
+  case GB_AUTH_CLEAR_ENFORCED:
+  case GB_AUTH_CLEAR_ENFORCEING:
+  case GB_AUTH_CLEAR_ENFORCE_FAIL:
+  case GB_RP_SUCCESS:
+  case GB_RP_FAIL:
+  case GB_RP_INPROGRESS:
+    return TRUE;
+  }
+
+  return FALSE;
+}