mgmt/glusterd: Store for snapshot

Introduced a new store for storing snapshot list for a given volume.

$GLUSTERD_INSTALL_PATH/vols/<volname>/snap_list.info
$GLUSTERD_INSTALL_PATH/vols/<volname>/snaps/
$GLUSTERD_INSTALL_PATH/vols/<volname>/snaps/<snap-name>/info <-snapshot volume info
$GLUSTERD_INSTALL_PATH/vols/<volname>/snaps/<snap-name>/bricks <-snapshot volume brick dir
$GLUSTERD_INSTALL_PATH/vols/<volname>/snaps/<snap-name>/bricks/<infos>
<-snapshot volume brick info files
store delete options

TODO -

$GLUSTERD_INSTALL_PATH/CG/ <-place holder for all cg's
.../CG/<cg-name>/info <- per cg information placeholder

Change-Id: I1f9fd8ff7cc0682d05b33965736a43dca6adb3e9
Signed-off-by: shishir gowda <sgowda@redhat.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/xlators/mgmt/glusterd/src/glusterd.h b/xlators/mgmt/glusterd/src/glusterd.h
index 823c845c1..724618b0e 100644
--- a/xlators/mgmt/glusterd/src/glusterd.h
+++ b/xlators/mgmt/glusterd/src/glusterd.h
@@ -271,8 +271,10 @@ typedef struct glusterd_replace_brick_ glusterd_replace_brick_t;
 struct glusterd_volinfo_ {
         gf_lock_t                 lock;
         char                      volname[GLUSTERD_MAX_VOLUME_NAME];
+        gf_boolean_t              is_snap_volume;
         int                       type;
         int                       brick_count;
+        uint64_t                  snap_count;
         struct list_head          vol_list;
         struct list_head          bricks;
         struct list_head          snaps;
@@ -288,6 +290,7 @@ struct glusterd_volinfo_ {
         gf_store_handle_t        *shandle;
         gf_store_handle_t        *rb_shandle;
         gf_store_handle_t        *node_state_shandle;
+        gf_store_handle_t        *snap_list_shandle;
 
         /* Defrag/rebalance related */
         glusterd_rebalance_t      rebal;
@@ -336,6 +339,7 @@ struct glusterd_snap_ {
         char                    *description;
         time_t                   time_stamp;
         gd_snap_status_t         snap_status;
+        gf_store_handle_t       *shandle;
 };
 
 typedef struct glusterd_snap_ glusterd_snap_t;
@@ -348,6 +352,7 @@ struct glusterd_snap_cg_ {
         gd_snap_status_t        cg_status;
         int64_t                 volume_count;
         struct list_head        cg_list;
+        gf_store_handle_t      *shandle;
         glusterd_volinfo_t      volumes[0];
 };
 
@@ -397,6 +402,8 @@ enum glusterd_vol_comp_status_ {
 #define GLUSTERD_CKSUM_FILE "cksum"
 #define GLUSTERD_TRASH "trash"
 #define GLUSTERD_NODE_STATE_FILE "node_state.info"
+#define GLUSTERD_VOL_SNAP_FILE "snap_list.info"
+#define GLUSTERD_VOL_SNAP_DIR_PREFIX "snaps"
 
 /* definitions related to replace brick */
 #define RB_CLIENT_MOUNTPOINT    "rb_mount"
@@ -413,11 +420,20 @@ typedef ssize_t (*gd_serialize_t) (struct iovec outmsg, void *args);
         snprintf (path, PATH_MAX, "%s/vols/%s", priv->workdir,\
                   volinfo->volname);
 
+#define GLUSTERD_GET_SNAP_DIR(path, volinfo, snap_name, priv) \
+        snprintf (path, PATH_MAX, "%s/vols/%s/snaps/%s", priv->workdir,\
+                  volinfo->volname, snap_name);
+
 #define GLUSTERD_GET_BRICK_DIR(path, volinfo, priv) \
         snprintf (path, PATH_MAX, "%s/%s/%s/%s", priv->workdir,\
                   GLUSTERD_VOLUME_DIR_PREFIX, volinfo->volname, \
                   GLUSTERD_BRICK_INFO_DIR);
 
+#define GLUSTERD_GET_SNAP_BRICK_DIR(path, volinfo, snap_name, priv) \
+        snprintf (path, PATH_MAX, "%s/%s/%s/snaps/%s/%s", priv->workdir,\
+                  GLUSTERD_VOLUME_DIR_PREFIX, volinfo->volname, \
+                  snap_name, GLUSTERD_BRICK_INFO_DIR);
+
 #define GLUSTERD_GET_NFS_DIR(path, priv) \
         snprintf (path, PATH_MAX, "%s/nfs", priv->workdir);