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-rw-r--r--xlators/features/changelog/src/changelog-helpers.c52
-rw-r--r--xlators/features/changelog/src/changelog-helpers.h25
-rw-r--r--xlators/features/changelog/src/changelog-messages.h8
-rw-r--r--xlators/features/changelog/src/changelog-rpc-common.c3
-rw-r--r--xlators/features/changelog/src/changelog.c183
5 files changed, 147 insertions, 124 deletions
diff --git a/xlators/features/changelog/src/changelog-helpers.c b/xlators/features/changelog/src/changelog-helpers.c
index 71fe1f0..e561997 100644
--- a/xlators/features/changelog/src/changelog-helpers.c
+++ b/xlators/features/changelog/src/changelog-helpers.c
@@ -242,8 +242,7 @@ changelog_write(int fd, char *buffer, size_t len)
}
int
-htime_update(xlator_t *this, changelog_priv_t *priv, unsigned long ts,
- char *buffer)
+htime_update(xlator_t *this, changelog_priv_t *priv, time_t ts, char *buffer)
{
char changelog_path[PATH_MAX + 1] = {
0,
@@ -273,7 +272,7 @@ htime_update(xlator_t *this, changelog_priv_t *priv, unsigned long ts,
goto out;
}
- len = snprintf(x_value, sizeof(x_value), "%lu:%d", ts,
+ len = snprintf(x_value, sizeof(x_value), "%ld:%d", ts,
priv->rollover_count);
if (len >= sizeof(x_value)) {
ret = -1;
@@ -382,8 +381,7 @@ out:
}
static int
-changelog_rollover_changelog(xlator_t *this, changelog_priv_t *priv,
- unsigned long ts)
+changelog_rollover_changelog(xlator_t *this, changelog_priv_t *priv, time_t ts)
{
int ret = -1;
int notify = 0;
@@ -421,16 +419,14 @@ changelog_rollover_changelog(xlator_t *this, changelog_priv_t *priv,
priv->changelog_fd = -1;
}
- time_t time = (time_t)ts;
-
- /* Get GMT time */
- gmt = gmtime(&time);
+ /* Get GMT time. */
+ gmt = gmtime(&ts);
strftime(yyyymmdd, sizeof(yyyymmdd), "%Y/%m/%d", gmt);
(void)snprintf(ofile, PATH_MAX, "%s/" CHANGELOG_FILE_NAME,
priv->changelog_dir);
- (void)snprintf(nfile, PATH_MAX, "%s/%s/" CHANGELOG_FILE_NAME ".%lu",
+ (void)snprintf(nfile, PATH_MAX, "%s/%s/" CHANGELOG_FILE_NAME ".%ld",
priv->changelog_dir, yyyymmdd, ts);
(void)snprintf(nfile_dir, PATH_MAX, "%s/%s", priv->changelog_dir, yyyymmdd);
@@ -593,7 +589,7 @@ out:
* returns -1 on failure or error
*/
int
-htime_open(xlator_t *this, changelog_priv_t *priv, unsigned long ts)
+htime_open(xlator_t *this, changelog_priv_t *priv, time_t ts)
{
int ht_file_fd = -1;
int ht_dir_fd = -1;
@@ -723,7 +719,7 @@ out:
* returns -1 on failure or error
*/
int
-htime_create(xlator_t *this, changelog_priv_t *priv, unsigned long ts)
+htime_create(xlator_t *this, changelog_priv_t *priv, time_t ts)
{
int ht_file_fd = -1;
int ht_dir_fd = -1;
@@ -741,12 +737,12 @@ htime_create(xlator_t *this, changelog_priv_t *priv, unsigned long ts)
int32_t len = 0;
gf_smsg(this->name, GF_LOG_INFO, 0, CHANGELOG_MSG_NEW_HTIME_FILE,
- "name=%lu", ts, NULL);
+ "name=%ld", ts, NULL);
CHANGELOG_FILL_HTIME_DIR(priv->changelog_dir, ht_dir_path);
/* get the htime file name in ht_file_path */
- len = snprintf(ht_file_path, PATH_MAX, "%s/%s.%lu", ht_dir_path,
+ len = snprintf(ht_file_path, PATH_MAX, "%s/%s.%ld", ht_dir_path,
HTIME_FILE_NAME, ts);
if ((len < 0) || (len >= PATH_MAX)) {
ret = -1;
@@ -792,7 +788,7 @@ htime_create(xlator_t *this, changelog_priv_t *priv, unsigned long ts)
goto out;
}
- (void)snprintf(ht_file_bname, sizeof(ht_file_bname), "%s.%lu",
+ (void)snprintf(ht_file_bname, sizeof(ht_file_bname), "%s.%ld",
HTIME_FILE_NAME, ts);
if (sys_fsetxattr(ht_dir_fd, HTIME_CURRENT, ht_file_bname,
strlen(ht_file_bname), 0)) {
@@ -963,8 +959,8 @@ out:
}
int
-changelog_start_next_change(xlator_t *this, changelog_priv_t *priv,
- unsigned long ts, gf_boolean_t finale)
+changelog_start_next_change(xlator_t *this, changelog_priv_t *priv, time_t ts,
+ gf_boolean_t finale)
{
int ret = -1;
@@ -985,21 +981,12 @@ changelog_entry_length()
return sizeof(changelog_log_data_t);
}
-int
+void
changelog_fill_rollover_data(changelog_log_data_t *cld, gf_boolean_t is_last)
{
- struct timeval tv = {
- 0,
- };
-
cld->cld_type = CHANGELOG_TYPE_ROLLOVER;
-
- if (gettimeofday(&tv, NULL))
- return -1;
-
- cld->cld_roll_time = (unsigned long)tv.tv_sec;
+ cld->cld_roll_time = gf_time();
cld->cld_finale = is_last;
- return 0;
}
int
@@ -1274,7 +1261,7 @@ changelog_rollover(void *data)
while (1) {
(void)pthread_testcancel();
- tv.tv_sec = time(NULL) + priv->rollover_time;
+ tv.tv_sec = gf_time() + priv->rollover_time;
tv.tv_nsec = 0;
ret = 0; /* Reset ret to zero */
@@ -1355,12 +1342,7 @@ changelog_rollover(void *data)
if (priv->explicit_rollover == _gf_true)
sleep(1);
- ret = changelog_fill_rollover_data(&cld, _gf_false);
- if (ret) {
- gf_smsg(this->name, GF_LOG_ERROR, 0,
- CHANGELOG_MSG_ROLLOVER_DATA_FILL_FAILED, NULL);
- continue;
- }
+ changelog_fill_rollover_data(&cld, _gf_false);
_mask_cancellation();
diff --git a/xlators/features/changelog/src/changelog-helpers.h b/xlators/features/changelog/src/changelog-helpers.h
index 0906b16..38fa759 100644
--- a/xlators/features/changelog/src/changelog-helpers.h
+++ b/xlators/features/changelog/src/changelog-helpers.h
@@ -31,7 +31,7 @@
*/
typedef struct changelog_log_data {
/* rollover related */
- unsigned long cld_roll_time;
+ time_t cld_roll_time;
/* reopen changelog? */
gf_boolean_t cld_finale;
@@ -97,12 +97,6 @@ struct changelog_encoder {
typedef struct changelog_time_slice {
/**
- * just in case we need nanosecond granularity some day.
- * field is unused as of now (maybe we'd need it later).
- */
- struct timeval tv_start;
-
- /**
* version of changelog file, incremented each time changes
* rollover.
*/
@@ -190,8 +184,12 @@ 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;
@@ -419,11 +417,11 @@ changelog_local_t *
changelog_local_init(xlator_t *this, inode_t *inode, uuid_t gfid,
int xtra_records, gf_boolean_t update_flag);
int
-changelog_start_next_change(xlator_t *this, changelog_priv_t *priv,
- unsigned long ts, gf_boolean_t finale);
+changelog_start_next_change(xlator_t *this, changelog_priv_t *priv, time_t ts,
+ gf_boolean_t finale);
int
changelog_open_journal(xlator_t *this, changelog_priv_t *priv);
-int
+void
changelog_fill_rollover_data(changelog_log_data_t *cld, gf_boolean_t is_last);
int
changelog_inject_single_event(xlator_t *this, changelog_priv_t *priv,
@@ -447,12 +445,11 @@ changelog_fsync_thread(void *data);
int
changelog_forget(xlator_t *this, inode_t *inode);
int
-htime_update(xlator_t *this, changelog_priv_t *priv, unsigned long ts,
- char *buffer);
+htime_update(xlator_t *this, changelog_priv_t *priv, time_t ts, char *buffer);
int
-htime_open(xlator_t *this, changelog_priv_t *priv, unsigned long ts);
+htime_open(xlator_t *this, changelog_priv_t *priv, time_t ts);
int
-htime_create(xlator_t *this, changelog_priv_t *priv, unsigned long ts);
+htime_create(xlator_t *this, changelog_priv_t *priv, time_t ts);
/* Geo-Rep snapshot dependency changes */
void
diff --git a/xlators/features/changelog/src/changelog-messages.h b/xlators/features/changelog/src/changelog-messages.h
index 4dd56b8..cb0e16c 100644
--- a/xlators/features/changelog/src/changelog-messages.h
+++ b/xlators/features/changelog/src/changelog-messages.h
@@ -59,12 +59,12 @@ GLFS_MSGID(
CHANGELOG_MSG_NO_HTIME_CURRENT, CHANGELOG_MSG_HTIME_CURRENT,
CHANGELOG_MSG_NEW_HTIME_FILE, CHANGELOG_MSG_MKDIR_ERROR,
CHANGELOG_MSG_PATH_NOT_FOUND, CHANGELOG_MSG_XATTR_INIT_FAILED,
- CHANGELOG_MSG_WROTE_TO_CSNAP, CHANGELOG_MSG_ROLLOVER_DATA_FILL_FAILED,
+ CHANGELOG_MSG_WROTE_TO_CSNAP, CHANGELOG_MSG_UNUSED_0,
CHANGELOG_MSG_GET_BUFFER_FAILED, CHANGELOG_MSG_BARRIER_STATE_NOTIFY,
CHANGELOG_MSG_BARRIER_DISABLED, CHANGELOG_MSG_BARRIER_ALREADY_DISABLED,
CHANGELOG_MSG_BARRIER_ON_ERROR, CHANGELOG_MSG_BARRIER_ENABLE,
CHANGELOG_MSG_BARRIER_KEY_NOT_FOUND, CHANGELOG_MSG_ERROR_IN_DICT_GET,
- CHANGELOG_MSG_GET_TIME_FAILURE, CHANGELOG_MSG_HTIME_FETCH_FAILED,
+ CHANGELOG_MSG_UNUSED_1, CHANGELOG_MSG_UNUSED_2,
CHANGELOG_MSG_DEQUEUING_BARRIER_FOPS,
CHANGELOG_MSG_DEQUEUING_BARRIER_FOPS_FINISHED,
CHANGELOG_MSG_BARRIER_TIMEOUT, CHANGELOG_MSG_TIMEOUT_ADD_FAILED,
@@ -123,8 +123,6 @@ GLFS_MSGID(
#define CHANGELOG_MSG_GET_TIME_OP_FAILED_STR "Problem rolling over changelog(s)"
#define CHANGELOG_MSG_BARRIER_INFO_STR "Explicit wakeup on barrier notify"
#define CHANGELOG_MSG_SELECT_FAILED_STR "pthread_cond_timedwait failed"
-#define CHANGELOG_MSG_ROLLOVER_DATA_FILL_FAILED_STR \
- "failed to fill rollover data"
#define CHANGELOG_MSG_INJECT_FSYNC_FAILED_STR "failed to inject fsync event"
#define CHANGELOG_MSG_LOCAL_INIT_FAILED_STR \
"changelog local initialization failed"
@@ -144,9 +142,7 @@ GLFS_MSGID(
#define CHANGELOG_MSG_BARRIER_KEY_NOT_FOUND_STR "barrier key not found"
#define CHANGELOG_MSG_ERROR_IN_DICT_GET_STR \
"Something went wrong in dict_get_str_boolean"
-#define CHANGELOG_MSG_GET_TIME_FAILURE_STR "gettimeofday() failure"
#define CHANGELOG_MSG_DIR_OPTIONS_NOT_SET_STR "changelog-dir option is not set"
-#define CHANGELOG_MSG_HTIME_FETCH_FAILED_STR "unable to fetch htime"
#define CHANGELOG_MSG_FREEUP_FAILED_STR "could not cleanup bootstrapper"
#define CHANGELOG_MSG_CHILD_MISCONFIGURED_STR \
"translator needs a single subvolume"
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..6a6e5af 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);
+ if (priv->rpc) {
+ list_for_each_entry_safe(listener, next,
+ &priv->rpc->listeners, list)
+ {
+ if (listener->trans) {
+ rpc_transport_unref(listener->trans);
+ }
+ }
+ rpcsvc_destroy(priv->rpc);
+ priv->rpc = NULL;
+ }
+ CHANGELOG_MAKE_SOCKET_PATH(priv->changelog_brick, sockfile,
+ UNIX_PATH_MAX);
+ sys_unlink(sockfile);
+ 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;
}
@@ -2224,23 +2252,11 @@ static int
changelog_init(xlator_t *this, changelog_priv_t *priv)
{
int i = 0;
- int ret = -1;
- struct timeval tv = {
- 0,
- };
+ int ret = 0;
changelog_log_data_t cld = {
0,
};
- ret = gettimeofday(&tv, NULL);
- if (ret) {
- gf_smsg(this->name, GF_LOG_ERROR, errno, CHANGELOG_MSG_GET_TIME_FAILURE,
- NULL);
- goto out;
- }
-
- priv->slice.tv_start = tv;
-
priv->maps[CHANGELOG_TYPE_DATA] = "D ";
priv->maps[CHANGELOG_TYPE_METADATA] = "M ";
priv->maps[CHANGELOG_TYPE_METADATA_XATTR] = "M ";
@@ -2259,9 +2275,7 @@ changelog_init(xlator_t *this, changelog_priv_t *priv)
* in case there was an encoding change. so... things are kept
* simple here.
*/
- ret = changelog_fill_rollover_data(&cld, _gf_false);
- if (ret)
- goto out;
+ changelog_fill_rollover_data(&cld, _gf_false);
ret = htime_open(this, priv, cld.cld_roll_time);
/* call htime open with cld's rollover_time */
@@ -2405,6 +2419,22 @@ 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 +2443,9 @@ 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,
@@ -2423,9 +2456,6 @@ reconfigure(xlator_t *this, dict_t *options)
char csnap_dir[PATH_MAX] = {
0,
};
- struct timeval tv = {
- 0,
- };
uint32_t timeout = 0;
priv = this->private;
@@ -2434,6 +2464,7 @@ 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 +2498,29 @@ 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
@@ -2493,9 +2547,7 @@ reconfigure(xlator_t *this, dict_t *options)
out);
if (active_now || active_earlier) {
- ret = changelog_fill_rollover_data(&cld, !active_now);
- if (ret)
- goto out;
+ changelog_fill_rollover_data(&cld, !active_now);
slice = &priv->slice;
@@ -2514,13 +2566,7 @@ reconfigure(xlator_t *this, dict_t *options)
if (!active_earlier) {
gf_smsg(this->name, GF_LOG_INFO, 0, CHANGELOG_MSG_RECONFIGURE,
NULL);
- if (gettimeofday(&tv, NULL)) {
- gf_smsg(this->name, GF_LOG_ERROR, 0,
- CHANGELOG_MSG_HTIME_FETCH_FAILED, NULL);
- ret = -1;
- goto out;
- }
- htime_create(this, priv, tv.tv_sec);
+ htime_create(this, priv, gf_time());
}
ret = changelog_spawn_helper_threads(this, priv);
}
@@ -2597,6 +2643,7 @@ 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 +2682,6 @@ 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 +2778,13 @@ 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 +2796,9 @@ 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 +2824,11 @@ 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);
+ GF_FREE(priv->ev_dispatcher);
+ }
/* call barrier_disable to cancel timer */
if (priv->barrier_enabled)
__chlog_barrier_disable(this, &queue);
@@ -2859,6 +2897,13 @@ 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."