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authorMohit Agrawal <moagrawal@redhat.com>2018-09-29 13:15:35 +0530
committerMOHIT AGRAWAL <moagrawa@redhat.com>2020-02-09 12:42:56 +0000
commit6de80bcd6366778ac34ce58ec496fa08cc02bd0b (patch)
tree69d591b8949841ae7b891fd4d1dadd62c4202600
parentf1e62e1578ee07802827121722d90c1ec4b811a6 (diff)
feature/changelog: Avoid thread creation if xlator is not enabled
Problem: Changelog creates threads even if the changelog is not enabled Background: Changelog xlator broadly does two things 1. Journalling - Cosumers are geo-rep and glusterfind 2. Event Notification for registered events like (open, release etc) - Consumers are bitrot, geo-rep The existing option "changelog.changelog" controls journalling and there is no option to control event notification and is enabled by default. So when bitrot/geo-rep is not enabled on the volume, threads and resources(rpc and rbuf) related to event notifications consumes resources and cpu cycle which is unnecessary. Solution: The solution is to have two different options as below. 1. changelog-notification : Event notifications 2. changelog : Journalling This patch introduces the option "changelog-notification" which is not exposed to user. When either bitrot or changelog (journalling) is enabled, it internally enbales 'changelog-notification'. But once the 'changelog-notification' is enabled, it will not be disabled for the life time of the brick process even after bitrot and changelog is disabled. As of now, rpc resource cleanup has lot of races and is difficult to cleanup cleanly. If allowed, it leads to memory leaks and crashes on enable/disable of bitrot or changelog (journal) in a loop. Hence to be safer, the event notification is not disabled within lifetime of process once enabled. Change-Id: Ifd00286e0966049e8eb9f21567fe407cf11bb02a Updates: #475 Signed-off-by: Mohit Agrawal <moagrawal@redhat.com>
-rw-r--r--rpc/rpc-lib/src/rpcsvc.c26
-rw-r--r--tests/basic/changelog/changelog-history.t12
-rw-r--r--tests/bugs/bitrot/bug-1227996.t1
-rw-r--r--tests/bugs/bitrot/bug-1245981.t4
-rw-r--r--xlators/features/changelog/src/changelog-helpers.h4
-rw-r--r--xlators/features/changelog/src/changelog-rpc-common.c3
-rw-r--r--xlators/features/changelog/src/changelog.c149
-rw-r--r--xlators/mgmt/glusterd/src/glusterd-volgen.c13
8 files changed, 154 insertions, 58 deletions
diff --git a/rpc/rpc-lib/src/rpcsvc.c b/rpc/rpc-lib/src/rpcsvc.c
index 623523c..81d40c8 100644
--- a/rpc/rpc-lib/src/rpcsvc.c
+++ b/rpc/rpc-lib/src/rpcsvc.c
@@ -1855,6 +1855,18 @@ rpcsvc_program_unregister(rpcsvc_t *svc, rpcsvc_program_t *program)
goto out;
}
+ pthread_rwlock_rdlock(&svc->rpclock);
+ {
+ list_for_each_entry(prog, &svc->programs, program)
+ {
+ if ((prog->prognum == program->prognum) &&
+ (prog->progver == program->progver)) {
+ break;
+ }
+ }
+ }
+ pthread_rwlock_unlock(&svc->rpclock);
+
ret = rpcsvc_program_unregister_portmap(program);
if (ret == -1) {
gf_log(GF_RPCSVC, GF_LOG_ERROR,
@@ -1871,17 +1883,6 @@ rpcsvc_program_unregister(rpcsvc_t *svc, rpcsvc_program_t *program)
goto out;
}
#endif
- pthread_rwlock_rdlock(&svc->rpclock);
- {
- list_for_each_entry(prog, &svc->programs, program)
- {
- if ((prog->prognum == program->prognum) &&
- (prog->progver == program->progver)) {
- break;
- }
- }
- }
- pthread_rwlock_unlock(&svc->rpclock);
gf_log(GF_RPCSVC, GF_LOG_DEBUG,
"Program unregistered: %s, Num: %d,"
@@ -1902,6 +1903,9 @@ rpcsvc_program_unregister(rpcsvc_t *svc, rpcsvc_program_t *program)
ret = 0;
out:
+ if (prog)
+ GF_FREE(prog);
+
if (ret == -1) {
if (program) {
gf_log(GF_RPCSVC, GF_LOG_ERROR,
diff --git a/tests/basic/changelog/changelog-history.t b/tests/basic/changelog/changelog-history.t
index 106e5db..ea95261 100644
--- a/tests/basic/changelog/changelog-history.t
+++ b/tests/basic/changelog/changelog-history.t
@@ -5,6 +5,7 @@
cleanup;
+SCRIPT_TIMEOUT=300
HISTORY_BIN_PATH=$(dirname $0)/../../utils/changelog
build_tester $HISTORY_BIN_PATH/get-history.c -lgfchangelog
@@ -68,18 +69,21 @@ TEST $CLI volume set $V0 changelog.changelog off
sleep 3
time_after_disable=$(date '+%s')
+TEST $CLI volume set $V0 changelog.changelog on
+sleep 5
+
#Passes, gives the changelogs till continuous changelogs are available
# but returns 1
-EXPECT "1" $HISTORY_BIN_PATH/get-history $time_after_enable1 $time_in_sec_htime2
+EXPECT_WITHIN 10 "1" $HISTORY_BIN_PATH/get-history $time_after_enable1 $time_in_sec_htime2
#Fails as start falls between htime files
-EXPECT "-3" $HISTORY_BIN_PATH/get-history $time_between_htime $time_in_sec_htime1
+EXPECT_WITHIN 10 "-3" $HISTORY_BIN_PATH/get-history $time_between_htime $time_in_sec_htime1
#Passes as start and end falls in same htime file
-EXPECT "0" $HISTORY_BIN_PATH/get-history $time_in_sec_htime1 $time_in_sec_htime2
+EXPECT_WITHIN 10 "0" $HISTORY_BIN_PATH/get-history $time_in_sec_htime1 $time_in_sec_htime2
#Passes, gives the changelogs till continuous changelogs are available
-EXPECT "0" $HISTORY_BIN_PATH/get-history $time_in_sec_htime2 $time_after_disable
+EXPECT_WITHIN 10 "0" $HISTORY_BIN_PATH/get-history $time_in_sec_htime2 $time_after_disable
TEST rm $HISTORY_BIN_PATH/get-history
rm -rf /tmp/scratch_v1/*
diff --git a/tests/bugs/bitrot/bug-1227996.t b/tests/bugs/bitrot/bug-1227996.t
index 47ebc42..121c7b5 100644
--- a/tests/bugs/bitrot/bug-1227996.t
+++ b/tests/bugs/bitrot/bug-1227996.t
@@ -17,7 +17,6 @@ TEST pidof glusterd;
## Lets create and start the volume
TEST $CLI volume create $V0 $H0:$B0/${V0}0 $H0:$B0/${V0}1
TEST $CLI volume start $V0
-
## Enable bitrot on volume $V0
TEST $CLI volume bitrot $V0 enable
diff --git a/tests/bugs/bitrot/bug-1245981.t b/tests/bugs/bitrot/bug-1245981.t
index 2bed4d9..f395525 100644
--- a/tests/bugs/bitrot/bug-1245981.t
+++ b/tests/bugs/bitrot/bug-1245981.t
@@ -47,9 +47,9 @@ touch $M0/5
sleep `expr $SLEEP_TIME \* 2`
backpath=$(get_backend_paths $fname)
-TEST getfattr -m . -n trusted.bit-rot.signature $backpath
+EXPECT_WITHIN $PROCESS_UP_TIMEOUT 'trusted.bit-rot.signature' check_for_xattr 'trusted.bit-rot.signature' $backpath
backpath=$(get_backend_paths $M0/new_file)
-TEST getfattr -m . -n trusted.bit-rot.signature $backpath
+EXPECT_WITHIN $PROCESS_UP_TIMEOUT 'trusted.bit-rot.signature' check_for_xattr 'trusted.bit-rot.signature' $backpath
cleanup;
diff --git a/xlators/features/changelog/src/changelog-helpers.h b/xlators/features/changelog/src/changelog-helpers.h
index 0906b16..0d06d98 100644
--- a/xlators/features/changelog/src/changelog-helpers.h
+++ b/xlators/features/changelog/src/changelog-helpers.h
@@ -190,8 +190,12 @@ typedef struct changelog_ev_selector {
/* changelog's private structure */
struct changelog_priv {
+ /* changelog journalling */
gf_boolean_t active;
+ /* changelog live notifications */
+ gf_boolean_t rpc_active;
+
/* to generate unique socket file per brick */
char *changelog_brick;
diff --git a/xlators/features/changelog/src/changelog-rpc-common.c b/xlators/features/changelog/src/changelog-rpc-common.c
index afcc3a8..125246a 100644
--- a/xlators/features/changelog/src/changelog-rpc-common.c
+++ b/xlators/features/changelog/src/changelog-rpc-common.c
@@ -262,6 +262,9 @@ changelog_rpc_server_destroy(xlator_t *this, rpcsvc_t *rpc, char *sockfile,
struct rpcsvc_program *prog = NULL;
rpc_transport_t *trans = NULL;
+ if (!rpc)
+ return;
+
while (*progs) {
prog = *progs;
(void)rpcsvc_program_unregister(rpc, prog);
diff --git a/xlators/features/changelog/src/changelog.c b/xlators/features/changelog/src/changelog.c
index 0a03cfa..75d5ae2 100644
--- a/xlators/features/changelog/src/changelog.c
+++ b/xlators/features/changelog/src/changelog.c
@@ -34,6 +34,12 @@ static struct changelog_bootstrap cb_bootstrap[] = {
},
};
+static int
+changelog_init_rpc(xlator_t *this, changelog_priv_t *priv);
+
+static int
+changelog_init(xlator_t *this, changelog_priv_t *priv);
+
/* Entry operations - TYPE III */
/**
@@ -1997,6 +2003,11 @@ notify(xlator_t *this, int event, void *data, ...)
uint64_t clntcnt = 0;
changelog_clnt_t *conn = NULL;
gf_boolean_t cleanup_notify = _gf_false;
+ char sockfile[UNIX_PATH_MAX] = {
+ 0,
+ };
+ rpcsvc_listener_t *listener = NULL;
+ rpcsvc_listener_t *next = NULL;
INIT_LIST_HEAD(&queue);
@@ -2010,23 +2021,40 @@ notify(xlator_t *this, int event, void *data, ...)
"cleanup changelog rpc connection of brick %s",
priv->victim->name);
- this->cleanup_starting = 1;
- changelog_destroy_rpc_listner(this, priv);
- conn = &priv->connections;
- if (conn)
- changelog_ev_cleanup_connections(this, conn);
- xprtcnt = GF_ATOMIC_GET(priv->xprtcnt);
- clntcnt = GF_ATOMIC_GET(priv->clntcnt);
-
- if (!xprtcnt && !clntcnt) {
- LOCK(&priv->lock);
- {
- cleanup_notify = priv->notify_down;
- priv->notify_down = _gf_true;
+ if (priv->rpc_active) {
+ this->cleanup_starting = 1;
+ changelog_destroy_rpc_listner(this, priv);
+ conn = &priv->connections;
+ if (conn)
+ changelog_ev_cleanup_connections(this, conn);
+ xprtcnt = GF_ATOMIC_GET(priv->xprtcnt);
+ clntcnt = GF_ATOMIC_GET(priv->clntcnt);
+ if (!xprtcnt && !clntcnt) {
+ LOCK(&priv->lock);
+ {
+ cleanup_notify = priv->notify_down;
+ priv->notify_down = _gf_true;
+ }
+ UNLOCK(&priv->lock);
+ list_for_each_entry_safe(listener, next, &priv->rpc->listeners,
+ list)
+ {
+ if (listener->trans) {
+ rpc_transport_unref(listener->trans);
+ }
+ }
+ CHANGELOG_MAKE_SOCKET_PATH(priv->changelog_brick, sockfile,
+ UNIX_PATH_MAX);
+ sys_unlink(sockfile);
+ if (priv->rpc) {
+ rpcsvc_destroy(priv->rpc);
+ priv->rpc = NULL;
+ }
+ if (!cleanup_notify)
+ default_notify(this, GF_EVENT_PARENT_DOWN, data);
}
- UNLOCK(&priv->lock);
- if (!cleanup_notify)
- default_notify(this, GF_EVENT_PARENT_DOWN, data);
+ } else {
+ default_notify(this, GF_EVENT_PARENT_DOWN, data);
}
goto out;
}
@@ -2405,6 +2433,22 @@ changelog_barrier_pthread_destroy(changelog_priv_t *priv)
LOCK_DESTROY(&priv->bflags.lock);
}
+static void
+changelog_cleanup_rpc(xlator_t *this, changelog_priv_t *priv)
+{
+ /* terminate rpc server */
+ if (!this->cleanup_starting)
+ changelog_destroy_rpc_listner(this, priv);
+
+ (void)changelog_cleanup_rpc_threads(this, priv);
+ /* cleanup rot buffs */
+ rbuf_dtor(priv->rbuf);
+
+ /* cleanup poller thread */
+ if (priv->poller)
+ (void)changelog_thread_cleanup(this, priv->poller);
+}
+
int
reconfigure(xlator_t *this, dict_t *options)
{
@@ -2413,6 +2457,9 @@ reconfigure(xlator_t *this, dict_t *options)
changelog_priv_t *priv = NULL;
gf_boolean_t active_earlier = _gf_true;
gf_boolean_t active_now = _gf_true;
+ gf_boolean_t rpc_active_earlier = _gf_true;
+ gf_boolean_t rpc_active_now = _gf_true;
+ gf_boolean_t iniate_rpc = _gf_false;
changelog_time_slice_t *slice = NULL;
changelog_log_data_t cld = {
0,
@@ -2434,6 +2481,7 @@ reconfigure(xlator_t *this, dict_t *options)
ret = -1;
active_earlier = priv->active;
+ rpc_active_earlier = priv->rpc_active;
/* first stop the rollover and the fsync thread */
changelog_cleanup_helper_threads(this, priv);
@@ -2467,6 +2515,29 @@ reconfigure(xlator_t *this, dict_t *options)
goto out;
GF_OPTION_RECONF("changelog", active_now, options, bool, out);
+ GF_OPTION_RECONF("changelog-notification", rpc_active_now, options, bool,
+ out);
+
+ /* If journalling is enabled, enable rpc notifications */
+ if (active_now && !active_earlier) {
+ if (!rpc_active_earlier)
+ iniate_rpc = _gf_true;
+ }
+
+ if (rpc_active_now && !rpc_active_earlier) {
+ iniate_rpc = _gf_true;
+ }
+
+ /* TODO: Disable of changelog-notifications is not supported for now
+ * as there is no clean way of cleaning up of rpc resources
+ */
+
+ if (iniate_rpc) {
+ ret = changelog_init_rpc(this, priv);
+ if (ret)
+ goto out;
+ priv->rpc_active = _gf_true;
+ }
/**
* changelog_handle_change() handles changes that could possibly
@@ -2597,6 +2668,7 @@ changelog_init_options(xlator_t *this, changelog_priv_t *priv)
goto dealloc_2;
GF_OPTION_INIT("changelog", priv->active, bool, dealloc_2);
+ GF_OPTION_INIT("changelog-notification", priv->rpc_active, bool, dealloc_2);
GF_OPTION_INIT("capture-del-path", priv->capture_del_path, bool, dealloc_2);
GF_OPTION_INIT("op-mode", tmp, str, dealloc_2);
@@ -2635,22 +2707,6 @@ error_return:
return -1;
}
-static void
-changelog_cleanup_rpc(xlator_t *this, changelog_priv_t *priv)
-{
- /* terminate rpc server */
- if (!this->cleanup_starting)
- changelog_destroy_rpc_listner(this, priv);
-
- (void)changelog_cleanup_rpc_threads(this, priv);
- /* cleanup rot buffs */
- rbuf_dtor(priv->rbuf);
-
- /* cleanup poller thread */
- if (priv->poller)
- (void)changelog_thread_cleanup(this, priv->poller);
-}
-
static int
changelog_init_rpc(xlator_t *this, changelog_priv_t *priv)
{
@@ -2747,10 +2803,13 @@ init(xlator_t *this)
INIT_LIST_HEAD(&priv->queue);
priv->barrier_enabled = _gf_false;
- /* RPC ball rolling.. */
- ret = changelog_init_rpc(this, priv);
- if (ret)
- goto cleanup_barrier;
+ if (priv->rpc_active || priv->active) {
+ /* RPC ball rolling.. */
+ ret = changelog_init_rpc(this, priv);
+ if (ret)
+ goto cleanup_barrier;
+ priv->rpc_active = _gf_true;
+ }
ret = changelog_init(this, priv);
if (ret)
@@ -2762,7 +2821,9 @@ init(xlator_t *this)
return 0;
cleanup_rpc:
- changelog_cleanup_rpc(this, priv);
+ if (priv->rpc_active) {
+ changelog_cleanup_rpc(this, priv);
+ }
cleanup_barrier:
changelog_barrier_pthread_destroy(priv);
cleanup_options:
@@ -2788,9 +2849,10 @@ fini(xlator_t *this)
priv = this->private;
if (priv) {
- /* terminate RPC server/threads */
- changelog_cleanup_rpc(this, priv);
-
+ if (priv->active || priv->rpc_active) {
+ /* terminate RPC server/threads */
+ changelog_cleanup_rpc(this, priv);
+ }
/* call barrier_disable to cancel timer */
if (priv->barrier_enabled)
__chlog_barrier_disable(this, &queue);
@@ -2859,6 +2921,13 @@ struct volume_options options[] = {
.flags = OPT_FLAG_SETTABLE,
.level = OPT_STATUS_BASIC,
.tags = {"journal", "georep", "glusterfind"}},
+ {.key = {"changelog-notification"},
+ .type = GF_OPTION_TYPE_BOOL,
+ .default_value = "off",
+ .description = "enable/disable changelog live notification",
+ .op_version = {3},
+ .level = OPT_STATUS_BASIC,
+ .tags = {"bitrot", "georep"}},
{.key = {"changelog-brick"},
.type = GF_OPTION_TYPE_PATH,
.description = "brick path to generate unique socket file name."
diff --git a/xlators/mgmt/glusterd/src/glusterd-volgen.c b/xlators/mgmt/glusterd/src/glusterd-volgen.c
index aea25b1..59287ee 100644
--- a/xlators/mgmt/glusterd/src/glusterd-volgen.c
+++ b/xlators/mgmt/glusterd/src/glusterd-volgen.c
@@ -1842,6 +1842,19 @@ brick_graph_add_changelog(volgen_graph_t *graph, glusterd_volinfo_t *volinfo,
ret = xlator_set_fixed_option(xl, "changelog-dir", changelog_basepath);
if (ret)
goto out;
+
+ ret = glusterd_is_bitrot_enabled(volinfo);
+ if (ret == -1) {
+ goto out;
+ } else if (ret) {
+ ret = xlator_set_fixed_option(xl, "changelog-notification", "on");
+ if (ret)
+ goto out;
+ } else {
+ ret = xlator_set_fixed_option(xl, "changelog-notification", "off");
+ if (ret)
+ goto out;
+ }
out:
return ret;
}