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>

5 files changed, 91 insertions, 12 deletions

diff --git a/utils/capabilities.h b/utils/capabilities.h
index b157d80..80f03bd 100644
--- a/utils/capabilities.h
+++ b/utils/capabilities.h
@@ -37,6 +37,8 @@ enum gbCapabilities {
   GB_MODIFY_CAP,
   GB_MODIFY_AUTH_CAP,
 
+  GB_REPLACE_CAP,
+
   GB_JSON_CAP,
 
   GB_CAP_MAX
@@ -55,6 +57,8 @@ static const char *const gbCapabilitiesLookup[] = {
   [GB_MODIFY_CAP]              = "modify",
   [GB_MODIFY_AUTH_CAP]         = "modify_auth",
 
+  [GB_REPLACE_CAP]             = "replace",
+
   [GB_JSON_CAP]                = "json",
 
   [GB_CAP_MAX]                 = NULL
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;
+}
diff --git a/utils/common.h b/utils/common.h
index 2d1202a..02940c0 100644
--- a/utils/common.h
+++ b/utils/common.h
@@ -16,6 +16,13 @@
 # include "block.h"
 
 
+typedef struct blockServerDef {
+  size_t nhosts;
+  char   **hosts;
+} blockServerDef;
+typedef blockServerDef *blockServerDefPtr;
+
+
 static const char *const JsonResponseFormatLookup[] = {
   [GB_JSON_NONE]            = "",
 
@@ -82,4 +89,8 @@ char* glusterBlockFormatSize(const char *dom, size_t bytes);
 
 int convertStringToTrillianParse(const char *opt);
 
+void blockServerDefFree(blockServerDefPtr blkServers);
+
+bool blockhostIsValid(char *status);
+
 # endif /* _COMMON_H */
diff --git a/utils/gluster-block-caps.info b/utils/gluster-block-caps.info
index 2dcdbd4..ffdf679 100644
--- a/utils/gluster-block-caps.info
+++ b/utils/gluster-block-caps.info
@@ -96,3 +96,15 @@ modify_auth: true
 # Since: 0.2
 ##
 json: true
+
+
+##
+# Nature: cli command
+#
+# Label: 'replace'
+#
+# Description: capability to replace node for a given block
+#
+# Since: 0.4
+##
+replace: true
diff --git a/utils/utils.h b/utils/utils.h
index 7141a3f..7693b5c 100644
--- a/utils/utils.h
+++ b/utils/utils.h
@@ -85,6 +85,10 @@
 # define  FAILED_DELETING_FILE      "failed while deleting block file from gluster volume"
 # define  FAILED_DELETING_META      "failed while deleting block meta file from volume"
 
+/* Target Replace */
+# define  FAILED_REPLACE            "failed in replace"
+# define  FAILED_REMOTE_REPLACE     "failed in remote replace portal"
+
 # define  FAILED_DEPENDENCY         "failed dependency, check if you have targetcli and tcmu-runner installed"
 
 # define FMT_WARN(fmt...) do { if (0) printf (fmt); } while (0)
@@ -328,18 +332,19 @@ extern struct gbConf gbConf;
 
 
 typedef enum gbCliCmdlineOption {
-  GB_CLI_UNKNOWN        = 0,
-  GB_CLI_CREATE         = 1,
-  GB_CLI_LIST           = 2,
-  GB_CLI_INFO           = 3,
-  GB_CLI_DELETE         = 4,
-  GB_CLI_MODIFY         = 5,
-  GB_CLI_HELP           = 6,
-  GB_CLI_HYPHEN_HELP    = 7,
-  GB_CLI_VERSION        = 8,
-  GB_CLI_HYPHEN_VERSION = 9,
-  GB_CLI_USAGE          = 10,
-  GB_CLI_HYPHEN_USAGE   = 11,
+  GB_CLI_UNKNOWN = 0,
+  GB_CLI_CREATE,
+  GB_CLI_LIST,
+  GB_CLI_INFO,
+  GB_CLI_DELETE,
+  GB_CLI_MODIFY,
+  GB_CLI_REPLACE,
+  GB_CLI_HELP,
+  GB_CLI_HYPHEN_HELP,
+  GB_CLI_VERSION,
+  GB_CLI_HYPHEN_VERSION,
+  GB_CLI_USAGE,
+  GB_CLI_HYPHEN_USAGE,
 
   GB_CLI_OPT_MAX
 } gbCliCmdlineOption;
@@ -351,6 +356,7 @@ static const char *const gbCliCmdlineOptLookup[] = {
   [GB_CLI_INFO]           = "info",
   [GB_CLI_DELETE]         = "delete",
   [GB_CLI_MODIFY]         = "modify",
+  [GB_CLI_REPLACE]        = "replace",
   [GB_CLI_HELP]           = "help",
   [GB_CLI_HYPHEN_HELP]    = "--help",
   [GB_CLI_VERSION]        = "version",
@@ -442,6 +448,9 @@ typedef enum MetaStatus {
   GB_CLEANUP_SUCCESS          = 9,
   GB_CLEANUP_FAIL             = 10,
   GB_CLEANUP_INPROGRESS       = 11,
+  GB_RP_SUCCESS               = 12,
+  GB_RP_INPROGRESS            = 13,
+  GB_RP_FAIL                  = 14,
 
   GB_METASTATUS_MAX
 } MetaStatus;
@@ -459,6 +468,9 @@ static const char *const MetaStatusLookup[] = {
   [GB_CLEANUP_INPROGRESS]       = "CLEANUPINPROGRESS",
   [GB_CLEANUP_SUCCESS]          = "CLEANUPSUCCESS",
   [GB_CLEANUP_FAIL]             = "CLEANUPFAIL",
+  [GB_RP_SUCCESS]               = "RPSUCCESS",
+  [GB_RP_INPROGRESS]            = "RPINPROGRESS",
+  [GB_RP_FAIL]                  = "RPFAIL",
 
   [GB_METASTATUS_MAX]           = NULL,
 };