iscsi: remove idle connection handling
Some upcoming changes will effectively render this moot anyways by adding an epoll/kqueue descriptor to poll on in all cases (not just connections that have been idle for 5ms). The epoll/kqueue code was just ifdef'd out instead of removed - some of this code will be useful and reusable with minimal changes in the upcoming patches. Signed-off-by: Jim Harris <james.r.harris@intel.com> Change-Id: I0c354390537e6369cb3c32e78a59c300dec6d098 Reviewed-on: https://review.gerrithub.io/395553 Tested-by: SPDK Automated Test System <sys_sgsw@intel.com> Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com> Reviewed-by: <shuhei.matsumoto.xt@hitachi.com>
This commit is contained in:
Jim Harris
parent
8c2b8ca7d7
commit
4d48d87a7f
@ -95,6 +95,11 @@ Previously a part of the bdev_virtio module, now a separate library. Virtio is n
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via `spdk_internal/virtio.h` file. This is an internal interface to be used when implementing
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new Virtio backends, namely Virtio-BLK.
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### iSCSI
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The MinConnectionIdleInterval parameter has been removed, and connections are no longer migrated
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to an epoll/kqueue descriptor on the master core when idle.
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## v17.10: Logical Volumes
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### New dependencies
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@ -37,11 +37,6 @@
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AuthFile /usr/local/etc/spdk/auth.conf
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MinConnectionsPerCore 4
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# Power saving related variable, this parameter defines how long an iSCSI
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# connection must be idle before moving it to a state where it will consume
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# less power. This variable is defined in terms of microseconds. We set default
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# value as 5ms.
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MinConnectionIdleInterval 5000
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# Socket I/O timeout sec. (0 is infinite)
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Timeout 30
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@ -55,7 +55,6 @@ const char *spdk_net_framework_get_name(void);
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int spdk_net_framework_start(void);
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void spdk_net_framework_clear_socket_association(int sock);
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void spdk_net_framework_fini(void);
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int spdk_net_framework_idle_time(void);
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#define SPDK_IFNAMSIZE 32
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#define SPDK_MAX_IP_PER_IFC 32
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160
lib/iscsi/conn.c
160
lib/iscsi/conn.c
@ -61,9 +61,6 @@
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memset(&(conn)->portal, 0, sizeof(*(conn)) - \
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offsetof(struct spdk_iscsi_conn, portal));
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#define MICROSECOND_TO_TSC(x) ((x) * spdk_get_ticks_hz()/1000000)
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static int64_t g_conn_idle_interval_in_tsc = -1;
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#define DEFAULT_CONNECTIONS_PER_LCORE 4
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#define SPDK_MAX_POLLERS_PER_CORE 4096
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static int g_connections_per_lcore = DEFAULT_CONNECTIONS_PER_LCORE;
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@ -77,16 +74,9 @@ static pthread_mutex_t g_conns_mutex;
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static struct spdk_poller *g_shutdown_timer = NULL;
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static uint32_t spdk_iscsi_conn_allocate_reactor(uint64_t cpumask);
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static void __add_idle_conn(void *arg1, void *arg2);
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/** Global variables used for managing idle connections. */
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static int g_poll_fd = 0;
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static struct spdk_poller *g_idle_conn_poller;
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static STAILQ_HEAD(idle_list, spdk_iscsi_conn) g_idle_conn_list_head;
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void spdk_iscsi_conn_login_do_work(void *arg);
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void spdk_iscsi_conn_full_feature_do_work(void *arg);
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void spdk_iscsi_conn_idle_do_work(void *arg);
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static void spdk_iscsi_conn_full_feature_migrate(void *arg1, void *arg2);
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static struct spdk_event *spdk_iscsi_conn_get_migrate_event(struct spdk_iscsi_conn *conn,
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@ -94,11 +84,6 @@ static struct spdk_event *spdk_iscsi_conn_get_migrate_event(struct spdk_iscsi_co
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static void spdk_iscsi_conn_stop_poller(struct spdk_iscsi_conn *conn, spdk_event_fn fn_after_stop,
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int lcore);
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void spdk_iscsi_set_min_conn_idle_interval(int interval_in_us)
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{
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g_conn_idle_interval_in_tsc = MICROSECOND_TO_TSC(interval_in_us);
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}
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static struct spdk_iscsi_conn *
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allocate_conn(void)
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{
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@ -138,6 +123,11 @@ spdk_find_iscsi_connection_by_id(int cid)
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}
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}
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/*
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* Some of this code may be useful once we add back an epoll/kqueue descriptor
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* for normal processing. So just #if 0 it out for now.
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*/
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#if 0
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#if defined(__FreeBSD__)
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static int
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@ -335,6 +325,7 @@ check_idle_conns(void)
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}
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}
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#endif
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#endif
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int spdk_initialize_iscsi_conns(void)
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@ -383,17 +374,6 @@ int spdk_initialize_iscsi_conns(void)
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return -1;
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}
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if (g_conn_idle_interval_in_tsc == -1) {
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spdk_iscsi_set_min_conn_idle_interval(spdk_net_framework_idle_time());
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}
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STAILQ_INIT(&g_idle_conn_list_head);
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if (init_idle_conns() < 0) {
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return -1;
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}
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g_idle_conn_poller = spdk_poller_register(spdk_iscsi_conn_idle_do_work, NULL, 0);
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return 0;
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}
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@ -504,11 +484,9 @@ error_return:
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free_conn(conn);
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return -1;
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}
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conn->is_idle = 0;
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conn->logout_timer = NULL;
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conn->shutdown_timer = NULL;
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SPDK_NOTICELOG("Launching connection on acceptor thread\n");
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conn->last_activity_tsc = spdk_get_ticks();
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conn->pending_task_cnt = 0;
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conn->pending_activate_event = false;
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@ -845,18 +823,8 @@ spdk_iscsi_conn_stop_poller(struct spdk_iscsi_conn *conn, spdk_event_fn fn_after
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void spdk_shutdown_iscsi_conns(void)
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{
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struct spdk_iscsi_conn *conn, *tmp;
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int i;
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/* cleanup - move conns from list back into ring
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where they will get cleaned up
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*/
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STAILQ_FOREACH_SAFE(conn, &g_idle_conn_list_head, link, tmp) {
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STAILQ_REMOVE(&g_idle_conn_list_head, conn, spdk_iscsi_conn, link);
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spdk_event_call(spdk_iscsi_conn_get_migrate_event(conn, NULL));
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conn->is_idle = 0;
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del_idle_conn(conn);
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}
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struct spdk_iscsi_conn *conn;
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int i;
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pthread_mutex_lock(&g_conns_mutex);
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@ -989,7 +957,6 @@ spdk_iscsi_task_mgmt_cpl(struct spdk_scsi_task *scsi_task)
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{
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struct spdk_iscsi_task *task = spdk_iscsi_task_from_scsi_task(scsi_task);
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task->conn->last_activity_tsc = spdk_get_ticks();
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spdk_iscsi_task_mgmt_response(task->conn, task);
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spdk_iscsi_task_put(task);
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}
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@ -1063,7 +1030,6 @@ spdk_iscsi_task_cpl(struct spdk_scsi_task *scsi_task)
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struct spdk_iscsi_conn *conn = task->conn;
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spdk_trace_record(TRACE_ISCSI_TASK_DONE, conn->id, 0, (uintptr_t)task, 0);
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conn->last_activity_tsc = spdk_get_ticks();
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primary = spdk_iscsi_task_get_primary(task);
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@ -1361,19 +1327,6 @@ spdk_iscsi_conn_handle_incoming_pdus(struct spdk_iscsi_conn *conn)
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return i;
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}
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static void spdk_iscsi_conn_handle_idle(struct spdk_iscsi_conn *conn)
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{
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uint64_t current_tsc = spdk_get_ticks();
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if (g_conn_idle_interval_in_tsc > 0 &&
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((int64_t)(current_tsc - conn->last_activity_tsc)) >= g_conn_idle_interval_in_tsc &&
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conn->pending_task_cnt == 0) {
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spdk_trace_record(TRACE_ISCSI_CONN_IDLE, conn->id, 0, 0, 0);
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spdk_iscsi_conn_stop_poller(conn, __add_idle_conn, spdk_env_get_first_core());
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}
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}
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static int
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spdk_iscsi_conn_execute(struct spdk_iscsi_conn *conn)
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{
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@ -1471,103 +1424,8 @@ void
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spdk_iscsi_conn_full_feature_do_work(void *arg)
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{
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struct spdk_iscsi_conn *conn = arg;
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int rc = 0;
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rc = spdk_iscsi_conn_execute(conn);
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if (rc < 0) {
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return;
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} else if (rc > 0) {
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conn->last_activity_tsc = spdk_get_ticks();
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}
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/* Check if the session was idle during this access pass. If it was,
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and it was idle longer than the configured timeout, migrate this
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session to the first core. */
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spdk_iscsi_conn_handle_idle(conn);
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}
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/**
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* \brief This is the main routine for the iSCSI 'idle' connection
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* work item.
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*
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* This function handles processing of connecitons whose state have
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* been determined as 'idle' for lack of activity. These connections
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* no longer reside in the reactor's poller ring, instead they have
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* been staged into an idle list. This function utilizes the use of
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* epoll as a non-blocking means to test for new socket connection
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* events that indicate the connection should be moved back into the
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* active ring.
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*
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* While in the idle list, this function must scan these connections
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* to process required timer based actions that must be maintained
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* even though the connection is considered 'idle'.
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*/
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void spdk_iscsi_conn_idle_do_work(void *arg)
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{
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uint64_t tsc;
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struct spdk_iscsi_conn *tconn;
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check_idle_conns();
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/* Now walk the idle list to process timer based actions */
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STAILQ_FOREACH(tconn, &g_idle_conn_list_head, link) {
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assert(tconn->is_idle == 1);
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if (tconn->pending_activate_event == false) {
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tsc = spdk_get_ticks();
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if (tsc - tconn->last_nopin > tconn->nopininterval) {
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tconn->pending_activate_event = true;
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}
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}
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if (tconn->pending_activate_event) {
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int lcore;
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spdk_trace_record(TRACE_ISCSI_CONN_ACTIVE, tconn->id, 0, 0, 0);
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/* remove connection from idle list */
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STAILQ_REMOVE(&g_idle_conn_list_head, tconn, spdk_iscsi_conn, link);
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tconn->last_activity_tsc = spdk_get_ticks();
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tconn->pending_activate_event = false;
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tconn->is_idle = 0;
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del_idle_conn(tconn);
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/* migrate work item to new core */
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spdk_net_framework_clear_socket_association(tconn->sock);
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spdk_event_call(spdk_iscsi_conn_get_migrate_event(tconn, &lcore));
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__sync_fetch_and_add(&g_num_connections[lcore], 1);
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SPDK_DEBUGLOG(SPDK_LOG_ISCSI, "add conn id = %d, cid = %d poller = %p to lcore = %d active\n",
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tconn->id, tconn->cid, &tconn->poller, lcore);
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}
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} /* for each conn in idle list */
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}
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static void
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__add_idle_conn(void *arg1, void *arg2)
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{
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struct spdk_iscsi_conn *conn = arg1;
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int rc;
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/*
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* The iSCSI target may have started shutting down when this connection was
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* determined as idle. In that case, do not append the connection to the
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* idle list - just start the work item again so it can start its shutdown
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* process.
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*/
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if (conn->state == ISCSI_CONN_STATE_EXITING) {
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spdk_event_call(spdk_iscsi_conn_get_migrate_event(conn, NULL));
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return;
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}
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rc = add_idle_conn(conn);
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if (rc == 0) {
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SPDK_DEBUGLOG(SPDK_LOG_ISCSI, "add conn id = %d, cid = %d poller = %p to idle\n",
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conn->id, conn->cid, conn->poller);
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conn->is_idle = 1;
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STAILQ_INSERT_TAIL(&g_idle_conn_list_head, conn, link);
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} else {
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SPDK_ERRLOG("add_idle_conn() failed\n");
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}
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spdk_iscsi_conn_execute(conn);
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}
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void
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@ -70,7 +70,6 @@ struct spdk_poller;
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struct spdk_iscsi_conn {
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int id;
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int is_valid;
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int is_idle;
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/*
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* All fields below this point are reinitialized each time the
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* connection object is allocated. Make sure to update the
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@ -136,7 +135,6 @@ struct spdk_iscsi_conn {
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int authenticated;
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int req_auth;
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int req_mutual;
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uint64_t last_activity_tsc;
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uint32_t pending_task_cnt;
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uint32_t data_out_cnt;
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uint32_t data_in_cnt;
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@ -177,7 +175,6 @@ void spdk_iscsi_conn_logout(struct spdk_iscsi_conn *conn);
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int spdk_iscsi_drop_conns(struct spdk_iscsi_conn *conn,
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const char *conn_match, int drop_all);
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void spdk_iscsi_conn_set_min_per_core(int count);
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void spdk_iscsi_set_min_conn_idle_interval(int interval_in_us);
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int spdk_iscsi_conn_read_data(struct spdk_iscsi_conn *conn, int len,
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void *buf);
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@ -970,9 +970,6 @@ spdk_rpc_get_iscsi_connections(struct spdk_jsonrpc_request *request,
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spdk_json_write_name(w, "tsih");
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spdk_json_write_int32(w, tsih);
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spdk_json_write_name(w, "is_idle");
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spdk_json_write_int32(w, c->is_idle);
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spdk_json_write_name(w, "lcore_id");
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spdk_json_write_int32(w, c->lcore);
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@ -577,7 +577,6 @@ spdk_iscsi_read_parameters_from_config_file(struct spdk_conf_section *sp)
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int timeout;
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int nopininterval;
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int min_conn_per_core = 0;
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int conn_idle_interval = 0;
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const char *ag_tag;
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int ag_tag_i;
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@ -733,11 +732,6 @@ spdk_iscsi_read_parameters_from_config_file(struct spdk_conf_section *sp)
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if (min_conn_per_core >= 0) {
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spdk_iscsi_conn_set_min_per_core(min_conn_per_core);
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}
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conn_idle_interval = spdk_conf_section_get_intval(sp, "MinConnectionIdleInterval");
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if (conn_idle_interval > 0) {
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spdk_iscsi_set_min_conn_idle_interval(conn_idle_interval);
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}
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}
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static int
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@ -54,9 +54,3 @@ __attribute__((weak))
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void spdk_net_framework_clear_socket_association(int sock)
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{
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}
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__attribute__((weak))
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int spdk_net_framework_idle_time(void)
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{
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return IDLE_INTERVAL_TIME_IN_US;
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}
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@ -1,14 +0,0 @@
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#!/usr/bin/env bash
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set -xe
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rootdir=$(readlink -f $(dirname $0))/../../..
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rpc_py=$rootdir/scripts/rpc.py
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"$rpc_py" add_initiator_group 1 "ANY" "127.0.0.1/32"
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"$rpc_py" add_portal_group 1 '127.0.0.1:3260'
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for i in $(seq 0 15); do
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"$rpc_py" construct_malloc_bdev 32 512
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"$rpc_py" construct_target_node "Target$i" "Target_alias$i" "Malloc$i:0" "1:1" 64 1 0 0 0
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done
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@ -1,74 +0,0 @@
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#!/usr/bin/env python
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import json
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import os
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import sys
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from time import sleep
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from subprocess import check_output
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rpc_py = os.path.dirname(os.path.realpath(__file__)) + '/../../../scripts/rpc.py'
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class spdk_rpc(object):
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def __init__(self, rpc_py):
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self.rpc_py = rpc_py
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def __getattr__(self, name):
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def call(*args):
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cmd = "python {} {}".format(self.rpc_py, name)
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for arg in args:
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cmd += " {}".format(arg)
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return check_output(cmd, shell=True)
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return call
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if __name__ == '__main__':
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if (len(sys.argv) < 2) or (sys.argv[1] != "idle" and sys.argv[1] != "active"):
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print "must specify \"idle\" or \"active\""
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sys.exit(1)
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rpc = spdk_rpc(rpc_py)
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idle = 0
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active = 0
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# capture connection state 10 times, 10 ms apart and keep a
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# a running count of how many connections were found idle
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# and active
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for i in range(10):
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conns = json.loads(rpc.get_iscsi_connections())
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num_conns = len(conns)
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for conn in conns:
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if conn['is_idle'] == 1:
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idle += 1
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else:
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active += 1
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# sleep 10ms
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sleep(0.01)
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active_pct = float(active) / (idle + active)
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||||
# even when there is no active I/O on a connection, there could be
|
||||
# a nopin/nopout being processed which causes a connection to
|
||||
# temporarily go active; also even when fio is actively running
|
||||
# there could be a brief period of time where the initiator has
|
||||
# no active I/O to some connection
|
||||
#
|
||||
# so do not enforce that *all* connections must be idle or active;
|
||||
# allow for some percentage of anomalies
|
||||
anomaly_pct_allowed = 0.10
|
||||
|
||||
print "active = {}".format(active)
|
||||
print "idle = {}".format(idle)
|
||||
print "active_pct = {}".format(active_pct)
|
||||
|
||||
if sys.argv[1] == "idle" and active_pct > anomaly_pct_allowed:
|
||||
sys.exit(1)
|
||||
|
||||
if sys.argv[1] == "active" and active_pct < (1.00 - anomaly_pct_allowed):
|
||||
sys.exit(1)
|
||||
|
||||
sys.exit(0)
|
||||
@ -1,58 +0,0 @@
|
||||
#!/usr/bin/env bash
|
||||
|
||||
testdir=$(readlink -f $(dirname $0))
|
||||
rootdir=$(readlink -f $testdir/../../..)
|
||||
source $rootdir/scripts/autotest_common.sh
|
||||
source $rootdir/test/iscsi_tgt/common.sh
|
||||
|
||||
timing_enter idle_migration
|
||||
|
||||
# iSCSI target configuration
|
||||
PORT=3260
|
||||
|
||||
fio_py="python $rootdir/scripts/fio.py"
|
||||
|
||||
timing_enter start_iscsi_tgt
|
||||
|
||||
$ISCSI_APP -c $testdir/iscsi.conf -m $ISCSI_TEST_CORE_MASK &
|
||||
pid=$!
|
||||
echo "Process pid: $pid"
|
||||
|
||||
trap "killprocess $pid; exit 1" SIGINT SIGTERM EXIT
|
||||
|
||||
waitforlisten $pid
|
||||
echo "iscsi_tgt is listening. Running tests..."
|
||||
|
||||
timing_exit start_iscsi_tgt
|
||||
|
||||
$testdir/build_configuration.sh
|
||||
|
||||
sleep 1
|
||||
|
||||
iscsiadm -m discovery -t sendtargets -p $TARGET_IP:$PORT
|
||||
iscsiadm -m node --login -p $TARGET_IP:$PORT
|
||||
|
||||
trap "iscsicleanup; killprocess $pid; exit 1" SIGINT SIGTERM EXIT
|
||||
|
||||
sleep 5
|
||||
|
||||
# verify that ids has connections in idle state
|
||||
python $testdir/connection_status.py idle
|
||||
|
||||
# start fio in background - while it is running, verify that connections are active
|
||||
$fio_py 4096 16 randrw 15 &
|
||||
fiopid=$!
|
||||
sleep 5
|
||||
python $testdir/connection_status.py active
|
||||
kill $fiopid
|
||||
wait $fiopid || true
|
||||
sleep 1
|
||||
|
||||
# verify again that ids has connections in idle state
|
||||
python $testdir/connection_status.py idle
|
||||
|
||||
trap - SIGINT SIGTERM EXIT
|
||||
|
||||
iscsicleanup
|
||||
killprocess $pid
|
||||
timing_exit idle_migration
|
||||
@ -1,10 +0,0 @@
|
||||
[Global]
|
||||
|
||||
[iSCSI]
|
||||
NodeBase "iqn.2016-06.io.spdk"
|
||||
AuthFile /usr/local/etc/spdk/auth.conf
|
||||
Timeout 30
|
||||
DiscoveryAuthMethod Auto
|
||||
MaxSessions 64
|
||||
ImmediateData Yes
|
||||
ErrorRecoveryLevel 0
|
||||
@ -37,7 +37,6 @@ if [ $RUN_NIGHTLY -eq 1 ]; then
|
||||
if [ $SPDK_TEST_NVML -eq 1 ]; then
|
||||
run_test ./test/iscsi_tgt/pmem/iscsi_pmem.sh 4096 10
|
||||
fi
|
||||
run_test ./test/iscsi_tgt/idle_migration/idle_migration.sh
|
||||
run_test ./test/iscsi_tgt/ip_migration/ip_migration.sh
|
||||
run_test ./test/iscsi_tgt/ext4test/ext4test.sh
|
||||
run_test ./test/iscsi_tgt/digests/digests.sh
|
||||
|
||||
Loading…
Reference in New Issue
Block a user