mgmt/glusterd: volume to have 'uuid'

Signed-off-by: Amar Tumballi <amar@gluster.com>
Signed-off-by: Vijay Bellur <vijay@dev.gluster.com>

BUG: 1548 (nfs should be able to get different uuid for different subvolumes)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=1548

6 files changed, 102 insertions, 65 deletions

diff --git a/xlators/mgmt/glusterd/src/glusterd-handler.c b/xlators/mgmt/glusterd/src/glusterd-handler.c
index 07a7fca85..af672c933 100644
--- a/xlators/mgmt/glusterd/src/glusterd-handler.c
+++ b/xlators/mgmt/glusterd/src/glusterd-handler.c
@@ -1025,28 +1025,30 @@ out:
 int
 glusterd_handle_create_volume (rpcsvc_request_t *req)
 {
-        int32_t                         ret = -1;
-        gf1_cli_create_vol_req          cli_req = {0,};
-        dict_t                          *dict = NULL;
-        glusterd_brickinfo_t            *brickinfo = NULL;
-        char				*brick = NULL;
-        char				*bricks = NULL;
-        char				*volname = NULL;
-        int				brick_count = 0;
-        char                            *tmpptr = NULL;
-        int				i = 0;
-        glusterd_peerinfo_t             *peerinfo = NULL;
-        char				*brick_list = NULL;
-        void				*cli_rsp = NULL;
-        char				err_str[1048];
-        gf1_cli_create_vol_rsp          rsp = {0,};
-        glusterd_conf_t                 *priv = NULL;
-        int                             err_ret = 0;
-        glusterd_brickinfo_t            *tmpbrkinfo = NULL;
-        glusterd_volinfo_t              *volinfo = NULL;
-        xlator_t                        *this = NULL;
-        char                            *free_ptr = NULL;
-        char                            *trans_type = NULL;
+        int32_t                 ret         = -1;
+        gf1_cli_create_vol_req  cli_req     = {0,};
+        dict_t                 *dict        = NULL;
+        glusterd_brickinfo_t   *brickinfo   = NULL;
+        char		       *brick       = NULL;
+        char		       *bricks      = NULL;
+        char		       *volname     = NULL;
+        int			brick_count = 0;
+        char                   *tmpptr      = NULL;
+        int			i           = 0;
+        glusterd_peerinfo_t    *peerinfo    = NULL;
+        char		       *brick_list  = NULL;
+        void		       *cli_rsp     = NULL;
+        char			err_str[1048];
+        gf1_cli_create_vol_rsp  rsp         = {0,};
+        glusterd_conf_t        *priv        = NULL;
+        int                     err_ret     = 0;
+        glusterd_brickinfo_t   *tmpbrkinfo  = NULL;
+        glusterd_volinfo_t     *volinfo     = NULL;
+        xlator_t               *this        = NULL;
+        char                   *free_ptr    = NULL;
+        char                   *trans_type  = NULL;
+        uuid_t                  volume_id   = {0,};
+        char                    volid[64]   = {0,};
 
         GF_ASSERT (req);
 
@@ -1111,6 +1113,16 @@ glusterd_handle_create_volume (rpcsvc_request_t *req)
 		goto out;
         }
 
+        uuid_generate (volume_id);
+        uuid_unparse (volume_id, volid);
+        free_ptr = gf_strdup (volid);
+        ret = dict_set_dynstr (dict, "volume-id", free_ptr);
+        if (ret) {
+                gf_log ("", GF_LOG_ERROR, "unable to set volume-id");
+                goto out;
+        }
+        free_ptr = NULL;
+
         if (bricks) {
                 brick_list = gf_strdup (bricks);
                 free_ptr = brick_list;
@@ -2598,6 +2610,10 @@ glusterd_create_volume (rpcsvc_request_t *req, dict_t *dict)
         if (!data)
                 goto out;
 
+        data = dict_get (dict, "volume-id");
+        if (!data)
+                goto out;
+
         ret = glusterd_op_txn_begin ();
 
 out:
diff --git a/xlators/mgmt/glusterd/src/glusterd-op-sm.c b/xlators/mgmt/glusterd/src/glusterd-op-sm.c
index 9dbd90f76..f77e5ab3b 100644
--- a/xlators/mgmt/glusterd/src/glusterd-op-sm.c
+++ b/xlators/mgmt/glusterd/src/glusterd-op-sm.c
@@ -975,22 +975,23 @@ out:
 static int
 glusterd_op_create_volume (gd1_mgmt_stage_op_req *req)
 {
-        int                                     ret = 0;
-        dict_t                                  *dict = NULL;
-        char                                    *volname = NULL;
-        glusterd_conf_t                         *priv = NULL;
-        glusterd_volinfo_t                      *volinfo = NULL;
-        glusterd_brickinfo_t                    *brickinfo = NULL;
-        xlator_t                                *this = NULL;
-        char                                    *brick = NULL;
-        int32_t                                 count = 0;
-        int32_t                                 i = 1;
-        char                                    *bricks    = NULL;
-        char                                    *brick_list = NULL;
-        char                                    *free_ptr   = NULL;
-        char                                    *saveptr = NULL;
-        int32_t                                 sub_count = 0;
-        char                                    *trans_type = NULL;
+        int                   ret        = 0;
+        dict_t               *dict       = NULL;
+        char                 *volname    = NULL;
+        glusterd_conf_t      *priv       = NULL;
+        glusterd_volinfo_t   *volinfo    = NULL;
+        glusterd_brickinfo_t *brickinfo  = NULL;
+        xlator_t             *this       = NULL;
+        char                 *brick      = NULL;
+        int32_t               count      = 0;
+        int32_t               i          = 1;
+        char                 *bricks     = NULL;
+        char                 *brick_list = NULL;
+        char                 *free_ptr   = NULL;
+        char                 *saveptr    = NULL;
+        int32_t               sub_count  = 0;
+        char                 *trans_type = NULL;
+        char                 *str        = NULL;
 
         GF_ASSERT (req);
 
@@ -1072,14 +1073,24 @@ glusterd_op_create_volume (gd1_mgmt_stage_op_req *req)
                 goto out;
         }
 
-        if (strcasecmp (trans_type, "rdma") == 0) { 
+        ret = dict_get_str (dict, "volume-id", &str);
+        if (ret) {
+                gf_log ("", GF_LOG_ERROR, "Unable to get volume-id");
+                goto out;
+        }
+        ret = uuid_parse (str, volinfo->volume_id);
+        if (ret) {
+                gf_log ("", GF_LOG_ERROR, "unable to parse uuid %s", str);
+                goto out;
+        }
+
+        if (strcasecmp (trans_type, "rdma") == 0) {
                 volinfo->transport_type = GF_TRANSPORT_RDMA;
         } else {
                 volinfo->transport_type = GF_TRANSPORT_TCP;
         }
         volinfo->sub_count = sub_count;
 
-
         if (bricks) {
                 brick_list = gf_strdup (bricks);
                 free_ptr = brick_list;
diff --git a/xlators/mgmt/glusterd/src/glusterd-sm.h b/xlators/mgmt/glusterd/src/glusterd-sm.h
index 2bd2601cb..2442c6eb1 100644
--- a/xlators/mgmt/glusterd/src/glusterd-sm.h
+++ b/xlators/mgmt/glusterd/src/glusterd-sm.h
@@ -42,7 +42,6 @@ struct glusterd_store_handle_ {
         char    *path;
         int     fd;
         FILE    *read;
-        FILE    *write;
 };
 
 typedef struct glusterd_store_handle_  glusterd_store_handle_t;
diff --git a/xlators/mgmt/glusterd/src/glusterd-store.c b/xlators/mgmt/glusterd/src/glusterd-store.c
index 6e7fbd3b2..b18693eb2 100644
--- a/xlators/mgmt/glusterd/src/glusterd-store.c
+++ b/xlators/mgmt/glusterd/src/glusterd-store.c
@@ -319,6 +319,12 @@ glusterd_store_create_volume (glusterd_volinfo_t *volinfo)
         if (ret)
                 goto out;
 
+        uuid_unparse (volinfo->volume_id, buf);
+        ret = glusterd_store_save_value (volinfo->shandle,
+                                        GLUSTERD_STORE_KEY_VOL_ID, buf);
+        if (ret)
+                goto out;
+
         list_for_each_entry (brickinfo, &volinfo->bricks, brick_list) {
                 ret = glusterd_store_create_brick (volinfo, brickinfo);
                 if (ret)
@@ -498,17 +504,8 @@ glusterd_store_save_value (glusterd_store_handle_t *handle,
                 goto out;
         }
 
-        handle->write = fdopen (handle->fd, "a+");
-
-        if (!handle->write) {
-                gf_log ("", GF_LOG_ERROR, "Unable to open file %s errno: %d",
-                        handle->path, errno);
-                goto out;
-        }
-
         snprintf (buf, sizeof (buf), "%s=%s\n", key, value);
         ret = write (handle->fd, buf, strlen (buf));
-        //ret = fprintf (handle->write, "%s=%s\n", key, value);
 
         if (ret < 0) {
                 gf_log ("", GF_LOG_CRITICAL, "Unable to store key: %s,"
@@ -524,7 +521,6 @@ out:
 
         if (handle->fd > 0) {
                 close (handle->fd);
-                handle->write = NULL;
                 handle->fd = -1;
         }
 
@@ -955,6 +951,12 @@ glusterd_store_retrieve_volume (char    *volname)
                 } else if (!strncmp (key, GLUSTERD_STORE_KEY_VOL_TRANSPORT,
                             strlen (GLUSTERD_STORE_KEY_VOL_TRANSPORT))) {
                         volinfo->transport_type = atoi (value);
+                } else if (!strncmp (key, GLUSTERD_STORE_KEY_VOL_ID,
+                            strlen (GLUSTERD_STORE_KEY_VOL_ID))) {
+                        ret = uuid_parse (value, volinfo->volume_id);
+                        if (ret)
+                                gf_log ("", GF_LOG_WARNING,
+                                        "failed to parse uuid");
                 } else {
                         gf_log ("", GF_LOG_ERROR, "Unknown key: %s",
                                         key);
@@ -1082,6 +1084,12 @@ glusterd_store_update_volume (glusterd_volinfo_t *volinfo)
         if (ret)
                 goto out;
 
+        uuid_unparse (volinfo->volume_id, buf);
+        ret = glusterd_store_save_value (volinfo->shandle,
+                                        GLUSTERD_STORE_KEY_VOL_ID, buf);
+        if (ret)
+                goto out;
+
         list_for_each_entry (brickinfo, &volinfo->bricks, brick_list) {
                 ret = glusterd_store_create_brick (volinfo, brickinfo);
                 if (ret)
diff --git a/xlators/mgmt/glusterd/src/glusterd-store.h b/xlators/mgmt/glusterd/src/glusterd-store.h
index f12cb276b..ff426f617 100644
--- a/xlators/mgmt/glusterd/src/glusterd-store.h
+++ b/xlators/mgmt/glusterd/src/glusterd-store.h
@@ -38,23 +38,24 @@
 #include "rpcsvc.h"
 
 
-#define GLUSTERD_STORE_UUID_KEY  "UUID"
-
-#define GLUSTERD_STORE_KEY_VOL_TYPE "type"
-#define GLUSTERD_STORE_KEY_VOL_COUNT "count"
-#define GLUSTERD_STORE_KEY_VOL_STATUS "status"
-#define GLUSTERD_STORE_KEY_VOL_PORT   "port"
-#define GLUSTERD_STORE_KEY_VOL_SUB_COUNT   "sub_count"
-#define GLUSTERD_STORE_KEY_VOL_BRICK  "brick"
-#define GLUSTERD_STORE_KEY_VOL_VERSION  "version"
-#define GLUSTERD_STORE_KEY_VOL_TRANSPORT "transport-type"
+#define GLUSTERD_STORE_UUID_KEY           "UUID"
+
+#define GLUSTERD_STORE_KEY_VOL_TYPE       "type"
+#define GLUSTERD_STORE_KEY_VOL_COUNT      "count"
+#define GLUSTERD_STORE_KEY_VOL_STATUS     "status"
+#define GLUSTERD_STORE_KEY_VOL_PORT       "port"
+#define GLUSTERD_STORE_KEY_VOL_SUB_COUNT  "sub_count"
+#define GLUSTERD_STORE_KEY_VOL_BRICK      "brick"
+#define GLUSTERD_STORE_KEY_VOL_VERSION    "version"
+#define GLUSTERD_STORE_KEY_VOL_TRANSPORT  "transport-type"
+#define GLUSTERD_STORE_KEY_VOL_ID         "volume-id"
 
 #define GLUSTERD_STORE_KEY_BRICK_HOSTNAME "hostname"
-#define GLUSTERD_STORE_KEY_BRICK_PATH "path"
+#define GLUSTERD_STORE_KEY_BRICK_PATH     "path"
 
-#define GLUSTERD_STORE_KEY_PEER_UUID "uuid"
-#define GLUSTERD_STORE_KEY_PEER_HOSTNAME "hostname"
-#define GLUSTERD_STORE_KEY_PEER_STATE "state"
+#define GLUSTERD_STORE_KEY_PEER_UUID      "uuid"
+#define GLUSTERD_STORE_KEY_PEER_HOSTNAME  "hostname"
+#define GLUSTERD_STORE_KEY_PEER_STATE     "state"
 
 #define glusterd_for_each_entry(entry, dir) \
         do {\
diff --git a/xlators/mgmt/glusterd/src/glusterd.h b/xlators/mgmt/glusterd/src/glusterd.h
index ad89613fc..d733a84f4 100644
--- a/xlators/mgmt/glusterd/src/glusterd.h
+++ b/xlators/mgmt/glusterd/src/glusterd.h
@@ -143,6 +143,8 @@ struct glusterd_volinfo_ {
 
         /* All xlator options */
         dict_t                  *dict;
+
+        uuid_t                  volume_id;
 };
 
 typedef struct glusterd_volinfo_ glusterd_volinfo_t;