afr: wake up index healer threads

...whenever shd is re-enabled after disabling or there is a change in
`cluster.heal-timeout`, without needing to restart shd or waiting for the
current `cluster.heal-timeout` seconds to expire.

See BZ 1743988 for more details.

Change-Id: Ia5ebd7c8e9f5b54cba3199c141fdd1af2f9b9bfe
fixes: bz#1744548
Reported-by: Glen Kiessling <glenk1973@hotmail.com>
Signed-off-by: Ravishankar N <ravishankar@redhat.com>

5 files changed, 25 insertions, 11 deletions

diff --git a/xlators/cluster/afr/src/afr-common.c b/xlators/cluster/afr/src/afr-common.c
index 0b5cedf588f..2ad53c3ed5a 100644
--- a/xlators/cluster/afr/src/afr-common.c
+++ b/xlators/cluster/afr/src/afr-common.c
@@ -5670,10 +5670,8 @@ afr_notify(xlator_t *this, int32_t event, void *data, void *data2)
          * b) Already heard from everyone, but we now got a child-up
          *    event.
          */
-        if (have_heard_from_all && priv->shd.iamshd) {
-            for (i = 0; i < priv->child_count; i++)
-                if (priv->child_up[i])
-                    afr_selfheal_childup(this, i);
+        if (have_heard_from_all) {
+            afr_selfheal_childup(this, priv);
         }
     }
 out:
diff --git a/xlators/cluster/afr/src/afr-self-heald.c b/xlators/cluster/afr/src/afr-self-heald.c
index 9c94835714f..8b4d2dc9cd1 100644
--- a/xlators/cluster/afr/src/afr-self-heald.c
+++ b/xlators/cluster/afr/src/afr-self-heald.c
@@ -1308,12 +1308,18 @@ out:
     return ret;
 }
 
-int
-afr_selfheal_childup(xlator_t *this, int subvol)
+void
+afr_selfheal_childup(xlator_t *this, afr_private_t *priv)
 {
-    afr_shd_index_healer_spawn(this, subvol);
+    int subvol = 0;
 
-    return 0;
+    if (!priv->shd.iamshd)
+        return;
+    for (subvol = 0; subvol < priv->child_count; subvol++)
+        if (priv->child_up[subvol])
+            afr_shd_index_healer_spawn(this, subvol);
+
+    return;
 }
 
 int
diff --git a/xlators/cluster/afr/src/afr-self-heald.h b/xlators/cluster/afr/src/afr-self-heald.h
index 7de7c431460..19905394540 100644
--- a/xlators/cluster/afr/src/afr-self-heald.h
+++ b/xlators/cluster/afr/src/afr-self-heald.h
@@ -60,9 +60,6 @@ typedef struct {
 } afr_self_heald_t;
 
 int
-afr_selfheal_childup(xlator_t *this, int subvol);
-
-int
 afr_selfheal_daemon_init(xlator_t *this);
 
 int
diff --git a/xlators/cluster/afr/src/afr.c b/xlators/cluster/afr/src/afr.c
index 33a25cc5c0c..b2c64ecf0e6 100644
--- a/xlators/cluster/afr/src/afr.c
+++ b/xlators/cluster/afr/src/afr.c
@@ -141,6 +141,7 @@ reconfigure(xlator_t *this, dict_t *options)
     afr_private_t *priv = NULL;
     xlator_t *read_subvol = NULL;
     int read_subvol_index = -1;
+    int timeout_old = 0;
     int ret = -1;
     int index = -1;
     char *qtype = NULL;
@@ -150,6 +151,7 @@ reconfigure(xlator_t *this, dict_t *options)
     char *locking_scheme = NULL;
     gf_boolean_t consistent_io = _gf_false;
     gf_boolean_t choose_local_old = _gf_false;
+    gf_boolean_t enabled_old = _gf_false;
 
     priv = this->private;
 
@@ -255,11 +257,13 @@ reconfigure(xlator_t *this, dict_t *options)
     GF_OPTION_RECONF("ensure-durability", priv->ensure_durability, options,
                      bool, out);
 
+    enabled_old = priv->shd.enabled;
     GF_OPTION_RECONF("self-heal-daemon", priv->shd.enabled, options, bool, out);
 
     GF_OPTION_RECONF("iam-self-heal-daemon", priv->shd.iamshd, options, bool,
                      out);
 
+    timeout_old = priv->shd.timeout;
     GF_OPTION_RECONF("heal-timeout", priv->shd.timeout, options, int32, out);
 
     GF_OPTION_RECONF("consistent-metadata", priv->consistent_metadata, options,
@@ -283,6 +287,12 @@ reconfigure(xlator_t *this, dict_t *options)
         consistent_io = _gf_false;
     priv->consistent_io = consistent_io;
 
+    if (priv->shd.enabled) {
+        if ((priv->shd.enabled != enabled_old) ||
+            (timeout_old != priv->shd.timeout))
+            afr_selfheal_childup(this, priv);
+    }
+
     ret = 0;
 out:
     return ret;
diff --git a/xlators/cluster/afr/src/afr.h b/xlators/cluster/afr/src/afr.h
index c066099d5d3..a3f2942b317 100644
--- a/xlators/cluster/afr/src/afr.h
+++ b/xlators/cluster/afr/src/afr.h
@@ -1351,4 +1351,7 @@ afr_handle_replies_quorum(call_frame_t *frame, xlator_t *this);
 gf_boolean_t
 afr_ta_dict_contains_pending_xattr(dict_t *dict, afr_private_t *priv,
                                    int child);
+
+void
+afr_selfheal_childup(xlator_t *this, afr_private_t *priv);
 #endif /* __AFR_H__ */