mgmt/glusterd: save snapshot config values in store

Change-Id: Ia755e5c4af84827cc9b8876054cc48cfdc598876
Signed-off-by: shishir gowda <sgowda@redhat.com>

3 files changed, 90 insertions, 4 deletions

diff --git a/xlators/mgmt/glusterd/src/glusterd-snapshot.c b/xlators/mgmt/glusterd/src/glusterd-snapshot.c
index 6c365230b..810bce0ab 100644
--- a/xlators/mgmt/glusterd/src/glusterd-snapshot.c
+++ b/xlators/mgmt/glusterd/src/glusterd-snapshot.c
@@ -2436,8 +2436,14 @@ glusterd_snapshot_config_commit (dict_t *dict, char **op_errstr,
                         goto out;
                 }
                 conf->snap_max_limit = limit;
-                // TODO: do store
-
+                ret = glusterd_store_global_info (this);
+                if (ret) {
+                        snprintf (err_str, PATH_MAX,"Failed to store the"
+                                   " snapshot limit volinfo for system");
+                        *op_errstr = gf_strdup (err_str);
+                        gf_log (this->name, GF_LOG_ERROR, "%s", err_str);
+                        goto out;
+                }
                 break;
 
         case GF_SNAP_CONFIG_VOL_MAX:
@@ -2468,7 +2474,16 @@ glusterd_snapshot_config_commit (dict_t *dict, char **op_errstr,
                         goto out;
                 }
                 volinfo->snap_max_limit = limit;
-                //TODO: do store
+                ret = glusterd_store_volinfo (volinfo,
+                                             GLUSTERD_VOLINFO_VER_AC_INCREMENT);
+                if (ret) {
+                        snprintf (err_str, PATH_MAX,"Failed to store the"
+                                   " snapshot limit volinfo for volume %s",
+                                   volname);
+                        *op_errstr = gf_strdup (err_str);
+                        gf_log (this->name, GF_LOG_ERROR, "%s", err_str);
+                        goto out;
+                }
                 break;
 
         case GF_SNAP_CONFIG_CG_MAX:
diff --git a/xlators/mgmt/glusterd/src/glusterd-store.c b/xlators/mgmt/glusterd/src/glusterd-store.c
index 83c2a2fba..0640c9f93 100644
--- a/xlators/mgmt/glusterd/src/glusterd-store.c
+++ b/xlators/mgmt/glusterd/src/glusterd-store.c
@@ -690,7 +690,11 @@ glusterd_volume_exclude_options_write (int fd, glusterd_volinfo_t *volinfo)
                                    buf);
         if (ret)
                 goto out;
-
+        snprintf (buf, sizeof (buf), "%"PRIu64, volinfo->snap_max_limit);
+        ret = gf_store_save_value (fd, GLUSTERD_STORE_KEY_SNAP_MAX_LIMIT,
+                                   buf);
+        if (ret)
+                goto out;
 out:
         if (ret)
                 gf_log (THIS->name, GF_LOG_ERROR, "Unable to write volume "
@@ -1966,6 +1970,7 @@ glusterd_store_global_info (xlator_t *this)
         char                    path[PATH_MAX]          = {0,};
         gf_store_handle_t       *handle                 = NULL;
         char                    *uuid_str               = NULL;
+        char                     buf[256]               = {0, };
 
         conf = this->private;
 
@@ -2018,6 +2023,14 @@ glusterd_store_global_info (xlator_t *this)
                 goto out;
         }
 
+        snprintf (buf, sizeof (buf), "%"PRIu64, conf->snap_max_limit);
+        ret = gf_store_save_value (handle->fd,
+                                   GLUSTERD_STORE_KEY_SNAP_MAX_LIMIT, buf);
+        if (ret) {
+                gf_log (this->name, GF_LOG_ERROR,
+                        "Storing snap-max-limit failed ret = %d", ret);
+                goto out;
+        }
         ret = gf_store_rename_tmppath (handle);
 out:
         if (ret && (handle->fd > 0))
@@ -2089,6 +2102,57 @@ out:
         return ret;
 }
 
+int
+glusterd_retrieve_sys_snap_max_limit (xlator_t *this, uint64_t *limit)
+{
+        char                    *limit_str      = NULL;
+        glusterd_conf_t         *priv           = NULL;
+        int                     ret             = -1;
+        uint64_t                tmp_limit       = 0;
+        char                    *tmp            = NULL;
+        char                    path[PATH_MAX]  = {0,};
+        gf_store_handle_t       *handle         = NULL;
+
+        priv = this->private;
+
+        if (!priv->handle) {
+                snprintf (path, PATH_MAX, "%s/%s", priv->workdir,
+                          GLUSTERD_INFO_FILE);
+                ret = gf_store_handle_retrieve (path, &handle);
+
+                if (ret) {
+                        gf_log ("", GF_LOG_DEBUG, "Unable to get store "
+                                "handle!");
+                        goto out;
+                }
+
+                priv->handle = handle;
+        }
+
+        ret = gf_store_retrieve_value (priv->handle,
+                                       GLUSTERD_STORE_KEY_SNAP_MAX_LIMIT,
+                                       &limit_str);
+        if (ret) {
+                gf_log (this->name, GF_LOG_DEBUG,
+                        "No previous snap limit present");
+                goto out;
+        }
+
+        tmp_limit = strtoul (limit_str, &tmp, 10);
+        if ((tmp_limit <= 0) || (tmp && strlen (tmp) > 1)) {
+                gf_log (this->name, GF_LOG_WARNING, "invalid version number");
+                goto out;
+        }
+
+        *limit = tmp_limit;
+
+        ret = 0;
+out:
+        if (limit_str)
+                GF_FREE (limit_str);
+
+        return ret;
+}
 static int
 glusterd_restore_op_version (xlator_t *this)
 {
@@ -2136,6 +2200,9 @@ glusterd_restore_op_version (xlator_t *this)
                         " op-version to minimum : %d", GD_OP_VERSION_MIN);
                 conf->op_version = GD_OP_VERSION_MIN;
         }
+        ret = glusterd_retrieve_sys_snap_max_limit (this, &conf->snap_max_limit);
+        if (ret)
+                conf->snap_max_limit = GLUSTERD_SNAPS_MAX_LIMIT;
         ret = 0;
 out:
         return ret;
@@ -2637,6 +2704,9 @@ glusterd_store_retrieve_volume (char *volname, glusterd_snap_t *snap)
                 } else if (!strncmp (key, GLUSTERD_STORE_KEY_VOL_CLIENT_OP_VERSION,
                                 strlen (GLUSTERD_STORE_KEY_VOL_CLIENT_OP_VERSION))) {
                         volinfo->client_op_version = atoi (value);
+                } else if (!strncmp (key, GLUSTERD_STORE_KEY_SNAP_MAX_LIMIT,
+                                strlen (GLUSTERD_STORE_KEY_SNAP_MAX_LIMIT))) {
+                        volinfo->snap_max_limit = (uint64_t) atoll (value);
                 } else {
 
                         if (is_key_glusterd_hooks_friendly (key)) {
diff --git a/xlators/mgmt/glusterd/src/glusterd-store.h b/xlators/mgmt/glusterd/src/glusterd-store.h
index 5772809d7..2c7de0387 100644
--- a/xlators/mgmt/glusterd/src/glusterd-store.h
+++ b/xlators/mgmt/glusterd/src/glusterd-store.h
@@ -67,6 +67,7 @@ typedef enum glusterd_store_ver_ac_{
 #define GLUSTERD_STORE_KEY_SNAP_STATUS "status"
 #define GLUSTERD_STORE_KEY_SNAP_COUNT "count"
 #define GLUSTERD_STORE_KEY_CG_VOL_COUNT "count"
+#define GLUSTERD_STORE_KEY_SNAP_MAX_LIMIT "snap-max-limit"
 
 #define GLUSTERD_STORE_KEY_BRICK_HOSTNAME "hostname"
 #define GLUSTERD_STORE_KEY_BRICK_PATH     "path"