cluster/afr: [Feature] Command implementation to get heal-count

Currently to know the number of files to be healed, either user
has to go to backend and check the number of entries present in
indices/xattrop directory. But if a volume consists of large
number of bricks, going to each backend and counting the number
of entries is a time-taking task. Otherwise user can give
gluster volume heal vol-name info command but with this
approach if no. of entries are very hugh in the indices/
xattrop directory, it will comsume time.

So as a feature, new command is implemented.

Command 1: gluster volume heal vn statistics heal-count
This command will get the number of entries present in
every brick of a volume. The output displays only entries
count.

Command 2: gluster volume heal vn statistics heal-count
           replica 192.168.122.1:/home/user/brickname

           Here if we are concerned with just one replica.
So providing any one of the brick of a replica will get
the number of entries to be healed for that replica only.

Example:
Replicate volume with replica count 2.

Backend status:
--------------
[root@dhcp-0-17 xattrop]# ls -lia | wc -l
1918

NOTE: Out of 1918, 2 entries are <xattrop-gfid> dummy
entries so actual no. of entries to be healed are
1916.

[root@dhcp-0-17 xattrop]# pwd
/home/user/2ty/.glusterfs/indices/xattrop

Command output:
--------------
Gathering count of entries to be healed on volume volume3 has been successful

Brick 192.168.122.1:/home/user/22iu
Status: Brick is Not connected
Entries count is not available

Brick 192.168.122.1:/home/user/2ty
Number of entries: 1916

Change-Id: I72452f3de50502dc898076ec74d434d9e77fd290
BUG: 1015990
Signed-off-by: Venkatesh Somyajulu <vsomyaju@redhat.com>
Reviewed-on: http://review.gluster.org/6044
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>

1 files changed, 81 insertions, 0 deletions

diff --git a/tests/bugs/bug-1015990-rep.t b/tests/bugs/bug-1015990-rep.t
new file mode 100755
index 00000000000..f59bb2f75ba
--- /dev/null
+++ b/tests/bugs/bug-1015990-rep.t
@@ -0,0 +1,81 @@
+#!/bin/bash
+
+. $(dirname $0)/../include.rc
+. $(dirname $0)/../volume.rc
+. $(dirname $0)/../afr.rc
+cleanup;
+
+## Start and create a volume
+TEST glusterd;
+TEST pidof glusterd;
+TEST $CLI volume info;
+
+TEST $CLI volume create $V0 replica 2 $H0:$B0/${V0}{1,2,3,4};
+
+## Verify volume is is created
+EXPECT "$V0" volinfo_field $V0 'Volume Name';
+EXPECT 'Created' volinfo_field $V0 'Status';
+
+## Start volume and verify
+TEST $CLI volume start $V0;
+EXPECT 'Started' volinfo_field $V0 'Status';
+
+
+TEST glusterfs --volfile-id=/$V0 --volfile-server=$H0 $M0 --attribute-timeout=0 --entry-timeout=0
+
+
+
+TEST kill_brick $V0 $H0 $B0/$V0"1"
+sleep 5
+TEST kill_brick $V0 $H0 $B0/$V0"3"
+sleep 5
+
+for  i in  {1..100}; do echo "STRING" > $M0/File$i; done
+
+brick_2_sh_entries=$(count_sh_entries $B0/$V0"2")
+brick_4_sh_entries=$(count_sh_entries $B0/$V0"4")
+
+
+command_output=$(gluster volume heal $V0 statistics heal-count replica $H0:$B0/$V0"1")
+
+
+substring="Number of entries:"
+count=0
+while read -r line;
+do
+        if [[ "$line" == *$substring* ]]
+                then
+                        value=$(echo $line | cut -f 2 -d :)
+                        count=$(($count + $value))
+        fi
+
+done <<< "$command_output"
+
+brick_2_entries_count=$(($count-$value))
+
+EXPECT "0" echo $brick_2_entries_count
+
+brick_2_entries_count=$count
+
+
+xattrop_count_brick_2=$(count_sh_entries $B0/$V0"2")
+##Remove the count of the xattrop-gfid entry count as it does not contribute
+##to the number of files to be healed
+
+sub_val=1
+xattrop_count_brick_2=$(($xattrop_count_brick_2-$sub_val))
+
+ret=0
+if [ "$xattrop_count_brick_2" -eq "$brick_2_entries_count" ]
+        then
+                ret=$(($ret + $sub_val))
+fi
+
+EXPECT "1" echo $ret
+## Finish up
+TEST $CLI volume stop $V0;
+EXPECT 'Stopped' volinfo_field $V0 'Status';
+TEST $CLI volume delete $V0;
+TEST ! $CLI volume info $V0
+
+cleanup;