ec: Add state dump support

Change-Id: I4504f3050674dde217e79af28cb4d2b5370fe2d5
BUG: 1148010
Signed-off-by: Xavier Hernandez <xhernandez@datalab.es>
Reviewed-on: http://review.gluster.org/8891
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Emmanuel Dreyfus <manu@netbsd.org>
Tested-by: Emmanuel Dreyfus <manu@netbsd.org>
Reviewed-by: Dan Lambright <dlambrig@redhat.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>

3 files changed, 80 insertions, 0 deletions

diff --git a/tests/basic/ec/statedump.t b/tests/basic/ec/statedump.t
new file mode 100644
index 00000000000..6881c7f8c27
--- /dev/null
+++ b/tests/basic/ec/statedump.t
@@ -0,0 +1,26 @@
+#!/bin/bash
+
+. $(dirname $0)/../../include.rc
+. $(dirname $0)/../../volume.rc
+
+cleanup
+
+TEST glusterd
+TEST pidof glusterd
+TEST $CLI volume create $V0 redundancy 1 $H0:$B0/${V0}{0..2}
+TEST $CLI volume start $V0
+TEST $GFS --volfile-id=/$V0 --volfile-server=$H0 $M0
+
+EXPECT_WITHIN $CHILD_UP_TIMEOUT "3" ec_child_up_count $V0 0
+EXPECT_WITHIN $CHILD_UP_TIMEOUT "1" ec_child_up_status $V0 0 0
+EXPECT_WITHIN $CHILD_UP_TIMEOUT "1" ec_child_up_status $V0 0 1
+EXPECT_WITHIN $CHILD_UP_TIMEOUT "1" ec_child_up_status $V0 0 2
+
+TEST kill_brick $V0 $H0 $B0/${V0}0
+
+EXPECT_WITHIN $CHILD_UP_TIMEOUT "2" ec_child_up_count $V0 0
+EXPECT_WITHIN $CHILD_UP_TIMEOUT "0" ec_child_up_status $V0 0 0
+EXPECT_WITHIN $CHILD_UP_TIMEOUT "1" ec_child_up_status $V0 0 1
+EXPECT_WITHIN $CHILD_UP_TIMEOUT "1" ec_child_up_status $V0 0 2
+
+cleanup
diff --git a/tests/volume.rc b/tests/volume.rc
index 009f58b7c60..a216ba5fb7f 100644
--- a/tests/volume.rc
+++ b/tests/volume.rc
@@ -110,6 +110,30 @@ function afr_child_up_status {
         _afr_child_up_status $vol $brick_id generate_mount_statedump
 }
 
+function ec_get_info {
+        local vol=$1
+        local dist_id=$2
+        local key=$3
+        local fpath=$(generate_mount_statedump $vol)
+        local value=$(sed -n "/^\[cluster\/disperse\.$vol-disperse-$dist_id\]/,/^\[/{s/^$key=\(.*\)/\1/p;}" $fpath | head -1)
+        rm -f $fpath
+        echo "$value"
+}
+
+function ec_child_up_status {
+        local vol=$1
+        local dist_id=$2
+        local brick_id=$(($3 + 1))
+        local mask=$(ec_get_info $vol $dist_id "childs_up_mask")
+        echo "${mask: -$brick_id:1}"
+}
+
+function ec_child_up_count {
+        local vol=$1
+        local dist_id=$2
+        ec_get_info $vol $dist_id "childs_up"
+}
+
 function get_shd_process_pid {
         local vol=$1
         ps auxww | grep glusterfs | grep -E "glustershd/run/glustershd.pid" | awk '{print $2}' | head -1
diff --git a/xlators/cluster/ec/src/ec.c b/xlators/cluster/ec/src/ec.c
index 93bee1a4d32..545d109af9f 100644
--- a/xlators/cluster/ec/src/ec.c
+++ b/xlators/cluster/ec/src/ec.c
@@ -19,8 +19,10 @@
 */
 
 #include "defaults.h"
+#include "statedump.h"
 
 #include "ec-mem-types.h"
+#include "ec-helpers.h"
 #include "ec-common.h"
 #include "ec-fops.h"
 #include "ec-method.h"
@@ -830,6 +832,30 @@ int32_t ec_gf_releasedir(xlator_t * this, fd_t * fd)
     return 0;
 }
 
+int32_t ec_dump_private(xlator_t *this)
+{
+    ec_t *ec = NULL;
+    char  key_prefix[GF_DUMP_MAX_BUF_LEN];
+    char  tmp[65];
+
+    GF_ASSERT(this);
+
+    ec = this->private;
+    GF_ASSERT(ec);
+
+    snprintf(key_prefix, GF_DUMP_MAX_BUF_LEN, "%s.%s", this->type, this->name);
+    gf_proc_dump_add_section(key_prefix);
+    gf_proc_dump_write("nodes", "%u", ec->nodes);
+    gf_proc_dump_write("redundancy", "%u", ec->redundancy);
+    gf_proc_dump_write("fragment_size", "%u", ec->fragment_size);
+    gf_proc_dump_write("stripe_size", "%u", ec->stripe_size);
+    gf_proc_dump_write("childs_up", "%u", ec->xl_up_count);
+    gf_proc_dump_write("childs_up_mask", "%s",
+                       ec_bin(tmp, sizeof(tmp), ec->xl_up, ec->nodes));
+
+    return 0;
+}
+
 struct xlator_fops fops =
 {
     .lookup       = ec_gf_lookup,
@@ -884,6 +910,10 @@ struct xlator_cbks cbks =
     .releasedir        = ec_gf_releasedir
 };
 
+struct xlator_dumpops dumpops = {
+    .priv = ec_dump_private
+};
+
 struct volume_options options[] =
 {
     {