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-rw-r--r--drivers/target/iscsi/iscsi_target.c52
-rw-r--r--drivers/target/iscsi/iscsi_target_login.c45
-rw-r--r--drivers/target/iscsi/iscsi_target_login.h3
-rw-r--r--drivers/target/iscsi/iscsi_target_nego.c34
-rw-r--r--drivers/target/target_core_configfs.c49
-rw-r--r--drivers/target/target_core_hba.c10
-rw-r--r--drivers/target/target_core_pr.c2
-rw-r--r--drivers/target/target_core_rd.c1
-rw-r--r--drivers/target/target_core_spc.c53
9 files changed, 173 insertions, 76 deletions
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index 4e68b62193ed..fd092909a457 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -968,9 +968,9 @@ int iscsit_setup_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
cmd->cmd_flags |= ICF_NON_IMMEDIATE_UNSOLICITED_DATA;
conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt;
- if (hdr->flags & ISCSI_FLAG_CMD_READ) {
+ if (hdr->flags & ISCSI_FLAG_CMD_READ)
cmd->targ_xfer_tag = session_get_next_ttt(conn->sess);
- } else if (hdr->flags & ISCSI_FLAG_CMD_WRITE)
+ else
cmd->targ_xfer_tag = 0xFFFFFFFF;
cmd->cmd_sn = be32_to_cpu(hdr->cmdsn);
cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn);
@@ -3998,7 +3998,13 @@ get_immediate:
}
transport_err:
- iscsit_take_action_for_connection_exit(conn);
+ /*
+ * Avoid the normal connection failure code-path if this connection
+ * is still within LOGIN mode, and iscsi_np process context is
+ * responsible for cleaning up the early connection failure.
+ */
+ if (conn->conn_state != TARG_CONN_STATE_IN_LOGIN)
+ iscsit_take_action_for_connection_exit(conn);
out:
return 0;
}
@@ -4082,7 +4088,7 @@ reject:
int iscsi_target_rx_thread(void *arg)
{
- int ret;
+ int ret, rc;
u8 buffer[ISCSI_HDR_LEN], opcode;
u32 checksum = 0, digest = 0;
struct iscsi_conn *conn = arg;
@@ -4092,10 +4098,16 @@ int iscsi_target_rx_thread(void *arg)
* connection recovery / failure event can be triggered externally.
*/
allow_signal(SIGINT);
+ /*
+ * Wait for iscsi_post_login_handler() to complete before allowing
+ * incoming iscsi/tcp socket I/O, and/or failing the connection.
+ */
+ rc = wait_for_completion_interruptible(&conn->rx_login_comp);
+ if (rc < 0)
+ return 0;
if (conn->conn_transport->transport_type == ISCSI_INFINIBAND) {
struct completion comp;
- int rc;
init_completion(&comp);
rc = wait_for_completion_interruptible(&comp);
@@ -4532,7 +4544,18 @@ static void iscsit_logout_post_handler_closesession(
struct iscsi_conn *conn)
{
struct iscsi_session *sess = conn->sess;
- int sleep = cmpxchg(&conn->tx_thread_active, true, false);
+ int sleep = 1;
+ /*
+ * Traditional iscsi/tcp will invoke this logic from TX thread
+ * context during session logout, so clear tx_thread_active and
+ * sleep if iscsit_close_connection() has not already occured.
+ *
+ * Since iser-target invokes this logic from it's own workqueue,
+ * always sleep waiting for RX/TX thread shutdown to complete
+ * within iscsit_close_connection().
+ */
+ if (conn->conn_transport->transport_type == ISCSI_TCP)
+ sleep = cmpxchg(&conn->tx_thread_active, true, false);
atomic_set(&conn->conn_logout_remove, 0);
complete(&conn->conn_logout_comp);
@@ -4546,7 +4569,10 @@ static void iscsit_logout_post_handler_closesession(
static void iscsit_logout_post_handler_samecid(
struct iscsi_conn *conn)
{
- int sleep = cmpxchg(&conn->tx_thread_active, true, false);
+ int sleep = 1;
+
+ if (conn->conn_transport->transport_type == ISCSI_TCP)
+ sleep = cmpxchg(&conn->tx_thread_active, true, false);
atomic_set(&conn->conn_logout_remove, 0);
complete(&conn->conn_logout_comp);
@@ -4765,6 +4791,7 @@ int iscsit_release_sessions_for_tpg(struct iscsi_portal_group *tpg, int force)
struct iscsi_session *sess;
struct se_portal_group *se_tpg = &tpg->tpg_se_tpg;
struct se_session *se_sess, *se_sess_tmp;
+ LIST_HEAD(free_list);
int session_count = 0;
spin_lock_bh(&se_tpg->session_lock);
@@ -4786,14 +4813,17 @@ int iscsit_release_sessions_for_tpg(struct iscsi_portal_group *tpg, int force)
}
atomic_set(&sess->session_reinstatement, 1);
spin_unlock(&sess->conn_lock);
- spin_unlock_bh(&se_tpg->session_lock);
- iscsit_free_session(sess);
- spin_lock_bh(&se_tpg->session_lock);
+ list_move_tail(&se_sess->sess_list, &free_list);
+ }
+ spin_unlock_bh(&se_tpg->session_lock);
+
+ list_for_each_entry_safe(se_sess, se_sess_tmp, &free_list, sess_list) {
+ sess = (struct iscsi_session *)se_sess->fabric_sess_ptr;
+ iscsit_free_session(sess);
session_count++;
}
- spin_unlock_bh(&se_tpg->session_lock);
pr_debug("Released %d iSCSI Session(s) from Target Portal"
" Group: %hu\n", session_count, tpg->tpgt);
diff --git a/drivers/target/iscsi/iscsi_target_login.c b/drivers/target/iscsi/iscsi_target_login.c
index 3d0fe4ff5590..7e8f65e5448f 100644
--- a/drivers/target/iscsi/iscsi_target_login.c
+++ b/drivers/target/iscsi/iscsi_target_login.c
@@ -82,6 +82,7 @@ static struct iscsi_login *iscsi_login_init_conn(struct iscsi_conn *conn)
init_completion(&conn->conn_logout_comp);
init_completion(&conn->rx_half_close_comp);
init_completion(&conn->tx_half_close_comp);
+ init_completion(&conn->rx_login_comp);
spin_lock_init(&conn->cmd_lock);
spin_lock_init(&conn->conn_usage_lock);
spin_lock_init(&conn->immed_queue_lock);
@@ -644,7 +645,7 @@ static void iscsi_post_login_start_timers(struct iscsi_conn *conn)
iscsit_start_nopin_timer(conn);
}
-static int iscsit_start_kthreads(struct iscsi_conn *conn)
+int iscsit_start_kthreads(struct iscsi_conn *conn)
{
int ret = 0;
@@ -679,6 +680,7 @@ static int iscsit_start_kthreads(struct iscsi_conn *conn)
return 0;
out_tx:
+ send_sig(SIGINT, conn->tx_thread, 1);
kthread_stop(conn->tx_thread);
conn->tx_thread_active = false;
out_bitmap:
@@ -689,7 +691,7 @@ out_bitmap:
return ret;
}
-int iscsi_post_login_handler(
+void iscsi_post_login_handler(
struct iscsi_np *np,
struct iscsi_conn *conn,
u8 zero_tsih)
@@ -699,7 +701,6 @@ int iscsi_post_login_handler(
struct se_session *se_sess = sess->se_sess;
struct iscsi_portal_group *tpg = sess->tpg;
struct se_portal_group *se_tpg = &tpg->tpg_se_tpg;
- int rc;
iscsit_inc_conn_usage_count(conn);
@@ -739,10 +740,6 @@ int iscsi_post_login_handler(
sess->sess_ops->InitiatorName);
spin_unlock_bh(&sess->conn_lock);
- rc = iscsit_start_kthreads(conn);
- if (rc)
- return rc;
-
iscsi_post_login_start_timers(conn);
/*
* Determine CPU mask to ensure connection's RX and TX kthreads
@@ -751,15 +748,20 @@ int iscsi_post_login_handler(
iscsit_thread_get_cpumask(conn);
conn->conn_rx_reset_cpumask = 1;
conn->conn_tx_reset_cpumask = 1;
-
+ /*
+ * Wakeup the sleeping iscsi_target_rx_thread() now that
+ * iscsi_conn is in TARG_CONN_STATE_LOGGED_IN state.
+ */
+ complete(&conn->rx_login_comp);
iscsit_dec_conn_usage_count(conn);
+
if (stop_timer) {
spin_lock_bh(&se_tpg->session_lock);
iscsit_stop_time2retain_timer(sess);
spin_unlock_bh(&se_tpg->session_lock);
}
iscsit_dec_session_usage_count(sess);
- return 0;
+ return;
}
iscsi_set_session_parameters(sess->sess_ops, conn->param_list, 1);
@@ -800,10 +802,6 @@ int iscsi_post_login_handler(
" iSCSI Target Portal Group: %hu\n", tpg->nsessions, tpg->tpgt);
spin_unlock_bh(&se_tpg->session_lock);
- rc = iscsit_start_kthreads(conn);
- if (rc)
- return rc;
-
iscsi_post_login_start_timers(conn);
/*
* Determine CPU mask to ensure connection's RX and TX kthreads
@@ -812,10 +810,12 @@ int iscsi_post_login_handler(
iscsit_thread_get_cpumask(conn);
conn->conn_rx_reset_cpumask = 1;
conn->conn_tx_reset_cpumask = 1;
-
+ /*
+ * Wakeup the sleeping iscsi_target_rx_thread() now that
+ * iscsi_conn is in TARG_CONN_STATE_LOGGED_IN state.
+ */
+ complete(&conn->rx_login_comp);
iscsit_dec_conn_usage_count(conn);
-
- return 0;
}
static void iscsi_handle_login_thread_timeout(unsigned long data)
@@ -1380,23 +1380,12 @@ static int __iscsi_target_login_thread(struct iscsi_np *np)
if (ret < 0)
goto new_sess_out;
- if (!conn->sess) {
- pr_err("struct iscsi_conn session pointer is NULL!\n");
- goto new_sess_out;
- }
-
iscsi_stop_login_thread_timer(np);
- if (signal_pending(current))
- goto new_sess_out;
-
if (ret == 1) {
tpg_np = conn->tpg_np;
- ret = iscsi_post_login_handler(np, conn, zero_tsih);
- if (ret < 0)
- goto new_sess_out;
-
+ iscsi_post_login_handler(np, conn, zero_tsih);
iscsit_deaccess_np(np, tpg, tpg_np);
}
diff --git a/drivers/target/iscsi/iscsi_target_login.h b/drivers/target/iscsi/iscsi_target_login.h
index 1c7358081533..57aa0d0fd820 100644
--- a/drivers/target/iscsi/iscsi_target_login.h
+++ b/drivers/target/iscsi/iscsi_target_login.h
@@ -12,7 +12,8 @@ extern int iscsit_accept_np(struct iscsi_np *, struct iscsi_conn *);
extern int iscsit_get_login_rx(struct iscsi_conn *, struct iscsi_login *);
extern int iscsit_put_login_tx(struct iscsi_conn *, struct iscsi_login *, u32);
extern void iscsit_free_conn(struct iscsi_np *, struct iscsi_conn *);
-extern int iscsi_post_login_handler(struct iscsi_np *, struct iscsi_conn *, u8);
+extern int iscsit_start_kthreads(struct iscsi_conn *);
+extern void iscsi_post_login_handler(struct iscsi_np *, struct iscsi_conn *, u8);
extern void iscsi_target_login_sess_out(struct iscsi_conn *, struct iscsi_np *,
bool, bool);
extern int iscsi_target_login_thread(void *);
diff --git a/drivers/target/iscsi/iscsi_target_nego.c b/drivers/target/iscsi/iscsi_target_nego.c
index 8c02fa34716f..f9cde9141836 100644
--- a/drivers/target/iscsi/iscsi_target_nego.c
+++ b/drivers/target/iscsi/iscsi_target_nego.c
@@ -17,6 +17,7 @@
******************************************************************************/
#include <linux/ctype.h>
+#include <linux/kthread.h>
#include <scsi/iscsi_proto.h>
#include <target/target_core_base.h>
#include <target/target_core_fabric.h>
@@ -361,10 +362,24 @@ static int iscsi_target_do_tx_login_io(struct iscsi_conn *conn, struct iscsi_log
ntohl(login_rsp->statsn), login->rsp_length);
padding = ((-login->rsp_length) & 3);
+ /*
+ * Before sending the last login response containing the transition
+ * bit for full-feature-phase, go ahead and start up TX/RX threads
+ * now to avoid potential resource allocation failures after the
+ * final login response has been sent.
+ */
+ if (login->login_complete) {
+ int rc = iscsit_start_kthreads(conn);
+ if (rc) {
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
+ ISCSI_LOGIN_STATUS_NO_RESOURCES);
+ return -1;
+ }
+ }
if (conn->conn_transport->iscsit_put_login_tx(conn, login,
login->rsp_length + padding) < 0)
- return -1;
+ goto err;
login->rsp_length = 0;
mutex_lock(&sess->cmdsn_mutex);
@@ -373,6 +388,23 @@ static int iscsi_target_do_tx_login_io(struct iscsi_conn *conn, struct iscsi_log
mutex_unlock(&sess->cmdsn_mutex);
return 0;
+
+err:
+ if (login->login_complete) {
+ if (conn->rx_thread && conn->rx_thread_active) {
+ send_sig(SIGINT, conn->rx_thread, 1);
+ kthread_stop(conn->rx_thread);
+ }
+ if (conn->tx_thread && conn->tx_thread_active) {
+ send_sig(SIGINT, conn->tx_thread, 1);
+ kthread_stop(conn->tx_thread);
+ }
+ spin_lock(&iscsit_global->ts_bitmap_lock);
+ bitmap_release_region(iscsit_global->ts_bitmap, conn->bitmap_id,
+ get_order(1));
+ spin_unlock(&iscsit_global->ts_bitmap_lock);
+ }
+ return -1;
}
static void iscsi_target_sk_data_ready(struct sock *sk)
diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c
index 0b0de3647478..860e84046177 100644
--- a/drivers/target/target_core_configfs.c
+++ b/drivers/target/target_core_configfs.c
@@ -457,8 +457,15 @@ void target_unregister_template(const struct target_core_fabric_ops *fo)
if (!strcmp(t->tf_ops->name, fo->name)) {
BUG_ON(atomic_read(&t->tf_access_cnt));
list_del(&t->tf_list);
+ mutex_unlock(&g_tf_lock);
+ /*
+ * Wait for any outstanding fabric se_deve_entry->rcu_head
+ * callbacks to complete post kfree_rcu(), before allowing
+ * fabric driver unload of TFO->module to proceed.
+ */
+ rcu_barrier();
kfree(t);
- break;
+ return;
}
}
mutex_unlock(&g_tf_lock);
@@ -747,7 +754,7 @@ static ssize_t store_pi_prot_type(struct se_dev_attrib *da,
if (!dev->transport->init_prot || !dev->transport->free_prot) {
/* 0 is only allowed value for non-supporting backends */
if (flag == 0)
- return 0;
+ return count;
pr_err("DIF protection not supported by backend: %s\n",
dev->transport->name);
@@ -1590,9 +1597,9 @@ static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
u8 type = 0;
if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
- return 0;
+ return count;
if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
- return 0;
+ return count;
if (dev->export_count) {
pr_debug("Unable to process APTPL metadata while"
@@ -1658,22 +1665,32 @@ static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
* PR APTPL Metadata for Reservation
*/
case Opt_res_holder:
- match_int(args, &arg);
+ ret = match_int(args, &arg);
+ if (ret)
+ goto out;
res_holder = arg;
break;
case Opt_res_type:
- match_int(args, &arg);
+ ret = match_int(args, &arg);
+ if (ret)
+ goto out;
type = (u8)arg;
break;
case Opt_res_scope:
- match_int(args, &arg);
+ ret = match_int(args, &arg);
+ if (ret)
+ goto out;
break;
case Opt_res_all_tg_pt:
- match_int(args, &arg);
+ ret = match_int(args, &arg);
+ if (ret)
+ goto out;
all_tg_pt = (int)arg;
break;
case Opt_mapped_lun:
- match_int(args, &arg);
+ ret = match_int(args, &arg);
+ if (ret)
+ goto out;
mapped_lun = (u64)arg;
break;
/*
@@ -1701,14 +1718,20 @@ static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
}
break;
case Opt_tpgt:
- match_int(args, &arg);
+ ret = match_int(args, &arg);
+ if (ret)
+ goto out;
tpgt = (u16)arg;
break;
case Opt_port_rtpi:
- match_int(args, &arg);
+ ret = match_int(args, &arg);
+ if (ret)
+ goto out;
break;
case Opt_target_lun:
- match_int(args, &arg);
+ ret = match_int(args, &arg);
+ if (ret)
+ goto out;
target_lun = (u64)arg;
break;
default:
@@ -1985,7 +2008,7 @@ static ssize_t target_core_store_alua_lu_gp(
lu_gp_mem = dev->dev_alua_lu_gp_mem;
if (!lu_gp_mem)
- return 0;
+ return count;
if (count > LU_GROUP_NAME_BUF) {
pr_err("ALUA LU Group Alias too large!\n");
diff --git a/drivers/target/target_core_hba.c b/drivers/target/target_core_hba.c
index 62ea4e8e70a8..be9cefc07407 100644
--- a/drivers/target/target_core_hba.c
+++ b/drivers/target/target_core_hba.c
@@ -84,8 +84,16 @@ void target_backend_unregister(const struct target_backend_ops *ops)
list_for_each_entry(tb, &backend_list, list) {
if (tb->ops == ops) {
list_del(&tb->list);
+ mutex_unlock(&backend_mutex);
+ /*
+ * Wait for any outstanding backend driver ->rcu_head
+ * callbacks to complete post TBO->free_device() ->
+ * call_rcu(), before allowing backend driver module
+ * unload of target_backend_ops->owner to proceed.
+ */
+ rcu_barrier();
kfree(tb);
- break;
+ return;
}
}
mutex_unlock(&backend_mutex);
diff --git a/drivers/target/target_core_pr.c b/drivers/target/target_core_pr.c
index 0fdbe43b7dad..5ab7100de17e 100644
--- a/drivers/target/target_core_pr.c
+++ b/drivers/target/target_core_pr.c
@@ -1474,7 +1474,7 @@ core_scsi3_decode_spec_i_port(
LIST_HEAD(tid_dest_list);
struct pr_transport_id_holder *tidh_new, *tidh, *tidh_tmp;
unsigned char *buf, *ptr, proto_ident;
- const unsigned char *i_str;
+ const unsigned char *i_str = NULL;
char *iport_ptr = NULL, i_buf[PR_REG_ISID_ID_LEN];
sense_reason_t ret;
u32 tpdl, tid_len = 0;
diff --git a/drivers/target/target_core_rd.c b/drivers/target/target_core_rd.c
index 4703f403f31c..384cf8894411 100644
--- a/drivers/target/target_core_rd.c
+++ b/drivers/target/target_core_rd.c
@@ -333,6 +333,7 @@ static int rd_configure_device(struct se_device *dev)
dev->dev_attrib.hw_block_size = RD_BLOCKSIZE;
dev->dev_attrib.hw_max_sectors = UINT_MAX;
dev->dev_attrib.hw_queue_depth = RD_MAX_DEVICE_QUEUE_DEPTH;
+ dev->dev_attrib.is_nonrot = 1;
rd_dev->rd_dev_id = rd_host->rd_host_dev_id_count++;
diff --git a/drivers/target/target_core_spc.c b/drivers/target/target_core_spc.c
index b0744433315a..f87d4cef6d39 100644
--- a/drivers/target/target_core_spc.c
+++ b/drivers/target/target_core_spc.c
@@ -454,10 +454,17 @@ spc_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf)
cmd->se_sess->sess_prot_type == TARGET_DIF_TYPE1_PROT)
buf[4] = 0x5;
else if (dev->dev_attrib.pi_prot_type == TARGET_DIF_TYPE3_PROT ||
- cmd->se_sess->sess_prot_type == TARGET_DIF_TYPE3_PROT)
+ cmd->se_sess->sess_prot_type == TARGET_DIF_TYPE3_PROT)
buf[4] = 0x4;
}
+ /* logical unit supports type 1 and type 3 protection */
+ if ((dev->transport->get_device_type(dev) == TYPE_DISK) &&
+ (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) &&
+ (dev->dev_attrib.pi_prot_type || cmd->se_sess->sess_prot_type)) {
+ buf[4] |= (0x3 << 3);
+ }
+
/* Set HEADSUP, ORDSUP, SIMPSUP */
buf[5] = 0x07;
@@ -1196,17 +1203,13 @@ sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd)
struct se_dev_entry *deve;
struct se_session *sess = cmd->se_sess;
struct se_node_acl *nacl;
+ struct scsi_lun slun;
unsigned char *buf;
u32 lun_count = 0, offset = 8;
-
- if (cmd->data_length < 16) {
- pr_warn("REPORT LUNS allocation length %u too small\n",
- cmd->data_length);
- return TCM_INVALID_CDB_FIELD;
- }
+ __be32 len;
buf = transport_kmap_data_sg(cmd);
- if (!buf)
+ if (cmd->data_length && !buf)
return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
/*
@@ -1214,11 +1217,9 @@ sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd)
* coming via a target_core_mod PASSTHROUGH op, and not through
* a $FABRIC_MOD. In that case, report LUN=0 only.
*/
- if (!sess) {
- int_to_scsilun(0, (struct scsi_lun *)&buf[offset]);
- lun_count = 1;
+ if (!sess)
goto done;
- }
+
nacl = sess->se_node_acl;
rcu_read_lock();
@@ -1229,10 +1230,12 @@ sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd)
* See SPC2-R20 7.19.
*/
lun_count++;
- if ((offset + 8) > cmd->data_length)
+ if (offset >= cmd->data_length)
continue;
- int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]);
+ int_to_scsilun(deve->mapped_lun, &slun);
+ memcpy(buf + offset, &slun,
+ min(8u, cmd->data_length - offset));
offset += 8;
}
rcu_read_unlock();
@@ -1241,12 +1244,22 @@ sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd)
* See SPC3 r07, page 159.
*/
done:
- lun_count *= 8;
- buf[0] = ((lun_count >> 24) & 0xff);
- buf[1] = ((lun_count >> 16) & 0xff);
- buf[2] = ((lun_count >> 8) & 0xff);
- buf[3] = (lun_count & 0xff);
- transport_kunmap_data_sg(cmd);
+ /*
+ * If no LUNs are accessible, report virtual LUN 0.
+ */
+ if (lun_count == 0) {
+ int_to_scsilun(0, &slun);
+ if (cmd->data_length > 8)
+ memcpy(buf + offset, &slun,
+ min(8u, cmd->data_length - offset));
+ lun_count = 1;
+ }
+
+ if (buf) {
+ len = cpu_to_be32(lun_count * 8);
+ memcpy(buf, &len, min_t(int, sizeof len, cmd->data_length));
+ transport_kunmap_data_sg(cmd);
+ }
target_complete_cmd_with_length(cmd, GOOD, 8 + lun_count * 8);
return 0;
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-14 08:43:21 +0300