feature/snapshot : Interface to delete all snapshots belonging

to a system as-well-as to a particular volume.

Problem :
With the current design we can only delete a single snapshot.
And the deletion of volume which contains snapshot is not allowed.
Because of that user might be forced to delete all the snapshots
manually before he is allowed to delete a volume.

Solution:
Following is the interface with which user can delete
all the snapshots of a system or belonging to a particular volume.

        Syntax : gluster snapshot delete all

        *To delete all the snapshots present in a system

        Syntax : gluster snapshot delete volume <volname>

        *To deletes all the snapshot present in a volume specified.

========================================================================
Sample Output:

Case 1 : Deleting a single snapshot.
[root@snapshot-24 glusterfs]# gluster snapshot delete snap1
Deleting snap will erase all the information about the snap. Do you still want to continue? (y/n) y
snapshot delete: snap1: snap removed successfully

-----------------------------------------------------------------
Case 2 : Deleting all the snapshots in a Volume.
[root@snapshot-24 glusterfs]# gluster snapshot delete volume vol1
Volume (vol1) contains 9 snapshot(s).
Do you still want to continue and delete them?  (y/n) y
snapshot delete: snap2: snap removed successfully
snapshot delete: snap3: snap removed successfully
snapshot delete: snap4: snap removed successfully
snapshot delete: snap5: snap removed successfully
.
.
.

-----------------------------------------------------------------
Case 3 : Deleting all the snapshots in a system.
[root@snapshot-24 glusterfs]# gluster snapshot delete all
System contains 4 snapshot(s).
Do you still want to continue and delete them?  (y/n) y
snapshot delete: snap7: snap removed successfully
snapshot delete: snap8: snap removed successfully
snapshot delete: snap9: snap removed successfully
snapshot delete: snap10: snap removed successfully
========================================================================

Change-Id: Ifec8e128ab2011cbbba208376b9c92cfbe7d8d71
BUG: 1112613
Signed-off-by: Sachin Pandit <spandit@redhat.com>
Reviewed-on: http://review.gluster.org/8162
Reviewed-by: Atin Mukherjee <amukherj@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Avra Sengupta <asengupt@redhat.com>
Reviewed-by: Raghavendra Bhat <raghavendra@redhat.com>
Reviewed-by: Kaushal M <kaushal@redhat.com>

3 files changed, 128 insertions, 48 deletions

diff --git a/tests/bugs/bug-1087203.t b/tests/bugs/bug-1087203.t
index 585ecf440ac..e41d601fb66 100644
--- a/tests/bugs/bug-1087203.t
+++ b/tests/bugs/bug-1087203.t
@@ -5,50 +5,12 @@
 . $(dirname $0)/../snapshot.rc
 . $(dirname $0)/../cluster.rc
 
-function config_validate ()
-{
-        local var=$1
-        $CLI_1 snapshot config | grep "^$var" | sed 's/.*: //'
-}
-
-function snap_create ()
-{
-        local limit=$1;
-        local i=0
-        while [ $i -lt $limit ]
-        do
-                $CLI_1 snapshot create snap$i ${V0}
-                i=$[$i+1]
-        done
-}
-
-function snap_delete ()
-{
-        local limit=$1;
-        local i=0
-        while [ $i -lt $limit ]
-        do
-                $CLI_1 snapshot delete snap$i
-                i=$[$i+1]
-        done
-}
-
-function get_snap_count ()
-{
-        $CLI_1 snapshot list | wc -l
-}
-
 function get_volume_info ()
 {
         local var=$1
         $CLI_1 volume info $V0 | grep "^$var" | sed 's/.*: //'
 }
 
-function is_snapshot_present ()
-{
-        $CLI_1 snapshot list
-}
-
 cleanup;
 
 TEST verify_lvm_version
@@ -94,7 +56,7 @@ TEST $CLI_1 snapshot config $V0 snap-max-hard-limit 10
 
 # Validating auto-delete feature
 # Make sure auto-delete is disabled by default
-EXPECT 'disable' config_validate 'auto-delete'
+EXPECT 'disable' snap_config CLI_1 'auto-delete'
 
 # Test for invalid value for auto-delete
 TEST ! $CLI_1 snapshot config auto-delete test
@@ -103,36 +65,39 @@ TEST $CLI_1 snapshot config snap-max-hard-limit 6
 TEST $CLI_1 snapshot config snap-max-soft-limit 50
 
 # Create 4 snapshots
-TEST snap_create 4;
+snap_index=1
+snap_count=4
+TEST snap_create CLI_1 $V0 $snap_index $snap_count
 
 # If auto-delete is disabled then oldest snapshot
 # should not be deleted automatically.
-EXPECT '4' get_snap_count;
+EXPECT '4' get_snap_count CLI_1;
 
-TEST snap_delete 4;
+TEST snap_delete CLI_1 $snap_index $snap_count;
 
 # After all those 4 snaps are deleted, There will not be any snaps present
-EXPECT 'No snapshots present' is_snapshot_present;
+EXPECT '0' get_snap_count CLI_1;
 
 TEST $CLI_1 snapshot config auto-delete enable
+
 # auto-delete is already enabled, Hence expect a failure.
 TEST ! $CLI_1 snapshot config auto-delete on
 
 # Testing other boolean values with auto-delete
 TEST $CLI_1 snapshot config auto-delete off
-EXPECT 'off' config_validate 'auto-delete'
+EXPECT 'off' snap_config CLI_1 'auto-delete'
 
 TEST $CLI_1 snapshot config auto-delete true
-EXPECT 'true' config_validate 'auto-delete'
+EXPECT 'true' snap_config CLI_1 'auto-delete'
 
 # Try to create 4 snaps again, As auto-delete is enabled
 # oldest snap should be deleted and snapcount should be 3
 
-TEST snap_create 4;
-EXPECT '3' get_snap_count;
+TEST snap_create CLI_1 $V0 $snap_index $snap_count;
+EXPECT '3' get_snap_count CLI_1;
 
 TEST $CLI_1 snapshot config auto-delete disable
-EXPECT 'disable' config_validate 'auto-delete'
+EXPECT 'disable' snap_config CLI_1 'auto-delete'
 
 cleanup;
 
diff --git a/tests/bugs/bug-1112613.t b/tests/bugs/bug-1112613.t
new file mode 100644
index 00000000000..17302eaa427
--- /dev/null
+++ b/tests/bugs/bug-1112613.t
@@ -0,0 +1,49 @@
+#!/bin/bash
+
+. $(dirname $0)/../include.rc
+. $(dirname $0)/../volume.rc
+. $(dirname $0)/../snapshot.rc
+. $(dirname $0)/../cluster.rc
+
+cleanup;
+
+V1="patchy2"
+
+TEST verify_lvm_version;
+TEST launch_cluster 2
+TEST setup_lvm 2
+
+TEST $CLI_1 peer probe $H2
+EXPECT_WITHIN $PROBE_TIMEOUT 1 peer_count
+
+TEST $CLI_1 volume create $V0 $H1:$L1
+TEST $CLI_1 volume start $V0
+TEST $CLI_1 volume create $V1 $H2:$L2
+TEST $CLI_1 volume start $V1
+
+# Create 3 snapshots for volume $V0
+snap_count=3
+snap_index=1
+TEST snap_create CLI_1 $V0 $snap_index $snap_count;
+
+# Create 3 snapshots for volume $V1
+snap_count=4
+snap_index=11
+TEST snap_create CLI_1 $V1 $snap_index $snap_count;
+
+EXPECT '3' get_snap_count CLI_1 $V0;
+EXPECT '4' get_snap_count CLI_1 $V1;
+EXPECT '7' get_snap_count CLI_1
+
+TEST $CLI_1 snapshot delete volume $V0
+EXPECT '0' get_snap_count CLI_1 $V0;
+EXPECT '4' get_snap_count CLI_1 $V1;
+EXPECT '4' get_snap_count CLI_1
+
+TEST $CLI_1 snapshot delete all
+EXPECT '0' get_snap_count CLI_1 $V0;
+EXPECT '0' get_snap_count CLI_1 $V1;
+EXPECT '0' get_snap_count CLI_1
+
+cleanup;
+
diff --git a/tests/snapshot.rc b/tests/snapshot.rc
index a208fa3d410..408b5a72a0c 100755
--- a/tests/snapshot.rc
+++ b/tests/snapshot.rc
@@ -318,3 +318,69 @@ function volume_exists() {
                 return 0
         fi
 }
+
+# arg-1 : From which node the command should be trigerred
+#         Ex : $CLI_1, $CLI_2, etc.
+# arg-2 : Volume name
+# arg-3 : Starting index for the snapname "snap$i"
+# arg-4 : Number of snapshots to be taken
+function snap_create()
+{
+        eval local cli_index=\$$1
+        local volname=$2
+        local i=$3
+        local limit=$[$i + $4]
+
+        while [ $i -lt $limit ]
+        do
+                $cli_index snapshot create snap$i $volname
+                i=$[$i+1]
+        done
+}
+
+# arg-1 : From which node the command should be trigerred
+#         Ex : $CLI_1. $CLI_2, etc.
+# arg-2 : Volume name.
+function get_snap_count()
+{
+        eval local cli_index=\$$1
+        local volname=$2
+
+
+        if [ -z "$2" ]
+        then
+                $cli_index snapshot list | grep -v "No snapshots present"\
+                                         | wc -l
+        else
+                $cli_index snapshot list $volname\
+                                         | grep -v "No snapshots present"\
+                                         | wc -l
+        fi
+}
+
+# arg-1 : From which node the command should be trigerred
+#         Ex : $CLI_1, $CLI_2, etc.
+# arg-2 : Starting index for the snapname "snap$i"
+# arg-3 : Number of snapshots to be deleted.
+function snap_delete()
+{
+        eval local cli_index=\$$1
+        local i=$2
+        local limit=$[$i + $3]
+
+        while [ $i -lt $limit ]
+        do
+                $cli_index snapshot delete snap$i
+                i=$[$i+1]
+        done
+}
+
+# arg-1 : From which node the command should be triggered
+#         Ex : $CLI_1, $CLI_2, etc.
+# arg-2 : key value
+function snap_config()
+{
+        eval local cli_index=\$$1
+        local var=$2
+        $cli_index snapshot config | grep "^$var" | sed 's/.*: //'
+}