gluster-block: support json response

This is how cli response looks like, on supplying '--json*' flag to cmd-args:

$ gluster-block create block-test/sample-block1 ha 1 localhost.localdomain 1GiB --json
                                (or)
$ gluster-block create block-test/sample-block2 ha 1 localhost.localdomain 1GiB --json-spaced
{ "IQN": "iqn.2016-12.org.gluster-block:681af106-85f1-4a02-a122-57c80903458c", \
  "PORTAL(S)": [ "localhost.localdomain:3260" ], "RESULT": "SUCCESS" }

$ gluster-block create block-test/sample-block3 ha 1 localhost.localdomain 1GiB --json-plain
{"IQN":"iqn.2016-12.org.gluster-block:0fdf6647-57f2-477f-8dd4-54a3de06e410",\
  "PORTAL(S)":["localhost.localdomain:3260"],"RESULT":"SUCCESS"}

$ gluster-block create block-test/sample-block4 ha 1 localhost.localdomain 1GiB --json-pretty
{
  "IQN":"iqn.2016-12.org.gluster-block:e92ca4a0-5325-4c4b-a407-9e75790e4c7f",
  "PORTAL(S)":[
    "localhost.localdomain:3260"
  ],
  "RESULT":"SUCCESS"
}

Change-Id: Ie51039e3dee0b3357d2347b4087e0fbe299aa29e
Fixes: #3
Signed-off-by: Prasanna Kumar Kalever <prasanna.kalever@redhat.com>

1 files changed, 7 insertions, 4 deletions

diff --git a/rpc/glfs-operations.h b/rpc/glfs-operations.h
index 3e7f72a..47aced2 100644
--- a/rpc/glfs-operations.h
+++ b/rpc/glfs-operations.h
@@ -41,22 +41,25 @@ typedef struct MetaInfo {
 
 
 struct glfs *
-glusterBlockVolumeInit(char *volume);
+glusterBlockVolumeInit(char *volume, int *errCode, char **errMsg);
 
 int
-glusterBlockCreateEntry(struct glfs *glfs, blockCreateCli *blk, char *gbid);
+glusterBlockCreateEntry(struct glfs *glfs, blockCreateCli *blk, char *gbid,
+                        int *errCode, char **errMsg);
 
 int
 glusterBlockDeleteEntry(struct glfs *glfs, char *volume, char *gbid);
 
 struct glfs_fd *
-glusterBlockCreateMetaLockFile(struct glfs *glfs, char *volume);
+glusterBlockCreateMetaLockFile(struct glfs *glfs, char *volume, int *errCode,
+                               char **errMsg);
 
 int
 glusterBlockDeleteMetaFile(struct glfs *glfs, char *volume, char *blockname);
 
 int
-blockGetMetaInfo(struct glfs *glfs, char *metafile, MetaInfo *info);
+blockGetMetaInfo(struct glfs* glfs, char* metafile, MetaInfo *info,
+                 int *errCode);
 
 void
 blockFreeMetaInfo(MetaInfo *info);