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path: root/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_proto.c
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Diffstat (limited to 'drivers/staging/lustre/lnet/klnds/socklnd/socklnd_proto.c')
-rw-r--r--drivers/staging/lustre/lnet/klnds/socklnd/socklnd_proto.c175
1 files changed, 88 insertions, 87 deletions
diff --git a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_proto.c b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_proto.c
index 986bce4c9f3b..32cc31e4cc29 100644
--- a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_proto.c
+++ b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_proto.c
@@ -19,9 +19,6 @@
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
- * You should have received a copy of the GNU General Public License
- * along with Portals; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "socklnd.h"
@@ -56,15 +53,14 @@ ksocknal_next_tx_carrier(ksock_conn_t *conn)
/* Called holding BH lock: conn->ksnc_scheduler->kss_lock */
LASSERT(!list_empty(&conn->ksnc_tx_queue));
- LASSERT(tx != NULL);
+ LASSERT(tx);
/* Next TX that can carry ZC-ACK or LNet message */
if (tx->tx_list.next == &conn->ksnc_tx_queue) {
/* no more packets queued */
conn->ksnc_tx_carrier = NULL;
} else {
- conn->ksnc_tx_carrier = list_entry(tx->tx_list.next,
- ksock_tx_t, tx_list);
+ conn->ksnc_tx_carrier = list_next_entry(tx, tx_list);
LASSERT(conn->ksnc_tx_carrier->tx_msg.ksm_type == tx->tx_msg.ksm_type);
}
}
@@ -75,8 +71,8 @@ ksocknal_queue_tx_zcack_v2(ksock_conn_t *conn,
{
ksock_tx_t *tx = conn->ksnc_tx_carrier;
- LASSERT(tx_ack == NULL ||
- tx_ack->tx_msg.ksm_type == KSOCK_MSG_NOOP);
+ LASSERT(!tx_ack ||
+ tx_ack->tx_msg.ksm_type == KSOCK_MSG_NOOP);
/*
* Enqueue or piggyback tx_ack / cookie
@@ -85,10 +81,10 @@ ksocknal_queue_tx_zcack_v2(ksock_conn_t *conn,
* . There is tx can piggyback cookie of tx_ack (or cookie),
* piggyback the cookie and return the tx.
*/
- if (tx == NULL) {
- if (tx_ack != NULL) {
+ if (!tx) {
+ if (tx_ack) {
list_add_tail(&tx_ack->tx_list,
- &conn->ksnc_tx_queue);
+ &conn->ksnc_tx_queue);
conn->ksnc_tx_carrier = tx_ack;
}
return 0;
@@ -96,16 +92,16 @@ ksocknal_queue_tx_zcack_v2(ksock_conn_t *conn,
if (tx->tx_msg.ksm_type == KSOCK_MSG_NOOP) {
/* tx is noop zc-ack, can't piggyback zc-ack cookie */
- if (tx_ack != NULL)
+ if (tx_ack)
list_add_tail(&tx_ack->tx_list,
- &conn->ksnc_tx_queue);
+ &conn->ksnc_tx_queue);
return 0;
}
LASSERT(tx->tx_msg.ksm_type == KSOCK_MSG_LNET);
- LASSERT(tx->tx_msg.ksm_zc_cookies[1] == 0);
+ LASSERT(!tx->tx_msg.ksm_zc_cookies[1]);
- if (tx_ack != NULL)
+ if (tx_ack)
cookie = tx_ack->tx_msg.ksm_zc_cookies[1];
/* piggyback the zc-ack cookie */
@@ -128,7 +124,7 @@ ksocknal_queue_tx_msg_v2(ksock_conn_t *conn, ksock_tx_t *tx_msg)
* . If there is NOOP on the connection, piggyback the cookie
* and replace the NOOP tx, and return the NOOP tx.
*/
- if (tx == NULL) { /* nothing on queue */
+ if (!tx) { /* nothing on queue */
list_add_tail(&tx_msg->tx_list, &conn->ksnc_tx_queue);
conn->ksnc_tx_carrier = tx_msg;
return NULL;
@@ -162,22 +158,22 @@ ksocknal_queue_tx_zcack_v3(ksock_conn_t *conn,
return ksocknal_queue_tx_zcack_v2(conn, tx_ack, cookie);
/* non-blocking ZC-ACK (to router) */
- LASSERT(tx_ack == NULL ||
- tx_ack->tx_msg.ksm_type == KSOCK_MSG_NOOP);
+ LASSERT(!tx_ack ||
+ tx_ack->tx_msg.ksm_type == KSOCK_MSG_NOOP);
tx = conn->ksnc_tx_carrier;
- if (tx == NULL) {
- if (tx_ack != NULL) {
+ if (!tx) {
+ if (tx_ack) {
list_add_tail(&tx_ack->tx_list,
- &conn->ksnc_tx_queue);
+ &conn->ksnc_tx_queue);
conn->ksnc_tx_carrier = tx_ack;
}
return 0;
}
- /* conn->ksnc_tx_carrier != NULL */
+ /* conn->ksnc_tx_carrier */
- if (tx_ack != NULL)
+ if (tx_ack)
cookie = tx_ack->tx_msg.ksm_zc_cookies[1];
if (cookie == SOCKNAL_KEEPALIVE_PING) /* ignore keepalive PING */
@@ -185,7 +181,7 @@ ksocknal_queue_tx_zcack_v3(ksock_conn_t *conn,
if (tx->tx_msg.ksm_zc_cookies[1] == SOCKNAL_KEEPALIVE_PING) {
/* replace the keepalive PING with a real ACK */
- LASSERT(tx->tx_msg.ksm_zc_cookies[0] == 0);
+ LASSERT(!tx->tx_msg.ksm_zc_cookies[0]);
tx->tx_msg.ksm_zc_cookies[1] = cookie;
return 1;
}
@@ -197,7 +193,7 @@ ksocknal_queue_tx_zcack_v3(ksock_conn_t *conn,
return 1; /* XXX return error in the future */
}
- if (tx->tx_msg.ksm_zc_cookies[0] == 0) {
+ if (!tx->tx_msg.ksm_zc_cookies[0]) {
/* NOOP tx has only one ZC-ACK cookie, can carry at least one more */
if (tx->tx_msg.ksm_zc_cookies[1] > cookie) {
tx->tx_msg.ksm_zc_cookies[0] = tx->tx_msg.ksm_zc_cookies[1];
@@ -233,7 +229,7 @@ ksocknal_queue_tx_zcack_v3(ksock_conn_t *conn,
tmp = tx->tx_msg.ksm_zc_cookies[0];
}
- if (tmp != 0) {
+ if (tmp) {
/* range of cookies */
tx->tx_msg.ksm_zc_cookies[0] = tmp - 1;
tx->tx_msg.ksm_zc_cookies[1] = tmp + 1;
@@ -261,7 +257,7 @@ ksocknal_queue_tx_zcack_v3(ksock_conn_t *conn,
}
/* failed to piggyback ZC-ACK */
- if (tx_ack != NULL) {
+ if (tx_ack) {
list_add_tail(&tx_ack->tx_list, &conn->ksnc_tx_queue);
/* the next tx can piggyback at least 1 ACK */
ksocknal_next_tx_carrier(conn);
@@ -280,7 +276,7 @@ ksocknal_match_tx(ksock_conn_t *conn, ksock_tx_t *tx, int nonblk)
return SOCKNAL_MATCH_YES;
#endif
- if (tx == NULL || tx->tx_lnetmsg == NULL) {
+ if (!tx || !tx->tx_lnetmsg) {
/* noop packet */
nob = offsetof(ksock_msg_t, ksm_u);
} else {
@@ -319,7 +315,7 @@ ksocknal_match_tx_v3(ksock_conn_t *conn, ksock_tx_t *tx, int nonblk)
{
int nob;
- if (tx == NULL || tx->tx_lnetmsg == NULL)
+ if (!tx || !tx->tx_lnetmsg)
nob = offsetof(ksock_msg_t, ksm_u);
else
nob = tx->tx_lnetmsg->msg_len + sizeof(ksock_msg_t);
@@ -334,7 +330,7 @@ ksocknal_match_tx_v3(ksock_conn_t *conn, ksock_tx_t *tx, int nonblk)
case SOCKLND_CONN_ACK:
if (nonblk)
return SOCKNAL_MATCH_YES;
- else if (tx == NULL || tx->tx_lnetmsg == NULL)
+ else if (!tx || !tx->tx_lnetmsg)
return SOCKNAL_MATCH_MAY;
else
return SOCKNAL_MATCH_NO;
@@ -369,10 +365,10 @@ ksocknal_handle_zcreq(ksock_conn_t *c, __u64 cookie, int remote)
read_lock(&ksocknal_data.ksnd_global_lock);
conn = ksocknal_find_conn_locked(peer, NULL, !!remote);
- if (conn != NULL) {
+ if (conn) {
ksock_sched_t *sched = conn->ksnc_scheduler;
- LASSERT(conn->ksnc_proto->pro_queue_tx_zcack != NULL);
+ LASSERT(conn->ksnc_proto->pro_queue_tx_zcack);
spin_lock_bh(&sched->kss_lock);
@@ -390,11 +386,11 @@ ksocknal_handle_zcreq(ksock_conn_t *c, __u64 cookie, int remote)
/* ACK connection is not ready, or can't piggyback the ACK */
tx = ksocknal_alloc_tx_noop(cookie, !!remote);
- if (tx == NULL)
+ if (!tx)
return -ENOMEM;
rc = ksocknal_launch_packet(peer->ksnp_ni, tx, peer->ksnp_id);
- if (rc == 0)
+ if (!rc)
return 0;
ksocknal_free_tx(tx);
@@ -407,11 +403,12 @@ ksocknal_handle_zcack(ksock_conn_t *conn, __u64 cookie1, __u64 cookie2)
{
ksock_peer_t *peer = conn->ksnc_peer;
ksock_tx_t *tx;
+ ksock_tx_t *temp;
ksock_tx_t *tmp;
LIST_HEAD(zlist);
int count;
- if (cookie1 == 0)
+ if (!cookie1)
cookie1 = cookie2;
count = (cookie1 > cookie2) ? 2 : (cookie2 - cookie1 + 1);
@@ -424,8 +421,8 @@ ksocknal_handle_zcack(ksock_conn_t *conn, __u64 cookie1, __u64 cookie2)
spin_lock(&peer->ksnp_lock);
- list_for_each_entry_safe(tx, tmp,
- &peer->ksnp_zc_req_list, tx_zc_list) {
+ list_for_each_entry_safe(tx, tmp, &peer->ksnp_zc_req_list,
+ tx_zc_list) {
__u64 c = tx->tx_msg.ksm_zc_cookies[0];
if (c == cookie1 || c == cookie2 || (cookie1 < c && c < cookie2)) {
@@ -433,20 +430,19 @@ ksocknal_handle_zcack(ksock_conn_t *conn, __u64 cookie1, __u64 cookie2)
list_del(&tx->tx_zc_list);
list_add(&tx->tx_zc_list, &zlist);
- if (--count == 0)
+ if (!--count)
break;
}
}
spin_unlock(&peer->ksnp_lock);
- while (!list_empty(&zlist)) {
- tx = list_entry(zlist.next, ksock_tx_t, tx_zc_list);
+ list_for_each_entry_safe(tx, temp, &zlist, tx_zc_list) {
list_del(&tx->tx_zc_list);
ksocknal_tx_decref(tx);
}
- return count == 0 ? 0 : -EPROTO;
+ return !count ? 0 : -EPROTO;
}
static int
@@ -461,58 +457,59 @@ ksocknal_send_hello_v1(ksock_conn_t *conn, ksock_hello_msg_t *hello)
CLASSERT(sizeof(lnet_magicversion_t) == offsetof(lnet_hdr_t, src_nid));
LIBCFS_ALLOC(hdr, sizeof(*hdr));
- if (hdr == NULL) {
+ if (!hdr) {
CERROR("Can't allocate lnet_hdr_t\n");
return -ENOMEM;
}
hmv = (lnet_magicversion_t *)&hdr->dest_nid;
- /* Re-organize V2.x message header to V1.x (lnet_hdr_t)
- * header and send out */
- hmv->magic = cpu_to_le32 (LNET_PROTO_TCP_MAGIC);
- hmv->version_major = cpu_to_le16 (KSOCK_PROTO_V1_MAJOR);
- hmv->version_minor = cpu_to_le16 (KSOCK_PROTO_V1_MINOR);
+ /*
+ * Re-organize V2.x message header to V1.x (lnet_hdr_t)
+ * header and send out
+ */
+ hmv->magic = cpu_to_le32(LNET_PROTO_TCP_MAGIC);
+ hmv->version_major = cpu_to_le16(KSOCK_PROTO_V1_MAJOR);
+ hmv->version_minor = cpu_to_le16(KSOCK_PROTO_V1_MINOR);
- if (the_lnet.ln_testprotocompat != 0) {
+ if (the_lnet.ln_testprotocompat) {
/* single-shot proto check */
LNET_LOCK();
- if ((the_lnet.ln_testprotocompat & 1) != 0) {
+ if (the_lnet.ln_testprotocompat & 1) {
hmv->version_major++; /* just different! */
the_lnet.ln_testprotocompat &= ~1;
}
- if ((the_lnet.ln_testprotocompat & 2) != 0) {
+ if (the_lnet.ln_testprotocompat & 2) {
hmv->magic = LNET_PROTO_MAGIC;
the_lnet.ln_testprotocompat &= ~2;
}
LNET_UNLOCK();
}
- hdr->src_nid = cpu_to_le64 (hello->kshm_src_nid);
- hdr->src_pid = cpu_to_le32 (hello->kshm_src_pid);
- hdr->type = cpu_to_le32 (LNET_MSG_HELLO);
- hdr->payload_length = cpu_to_le32 (hello->kshm_nips * sizeof(__u32));
- hdr->msg.hello.type = cpu_to_le32 (hello->kshm_ctype);
- hdr->msg.hello.incarnation = cpu_to_le64 (hello->kshm_src_incarnation);
+ hdr->src_nid = cpu_to_le64(hello->kshm_src_nid);
+ hdr->src_pid = cpu_to_le32(hello->kshm_src_pid);
+ hdr->type = cpu_to_le32(LNET_MSG_HELLO);
+ hdr->payload_length = cpu_to_le32(hello->kshm_nips * sizeof(__u32));
+ hdr->msg.hello.type = cpu_to_le32(hello->kshm_ctype);
+ hdr->msg.hello.incarnation = cpu_to_le64(hello->kshm_src_incarnation);
rc = lnet_sock_write(sock, hdr, sizeof(*hdr), lnet_acceptor_timeout());
- if (rc != 0) {
+ if (rc) {
CNETERR("Error %d sending HELLO hdr to %pI4h/%d\n",
rc, &conn->ksnc_ipaddr, conn->ksnc_port);
goto out;
}
- if (hello->kshm_nips == 0)
+ if (!hello->kshm_nips)
goto out;
- for (i = 0; i < (int) hello->kshm_nips; i++) {
- hello->kshm_ips[i] = __cpu_to_le32 (hello->kshm_ips[i]);
- }
+ for (i = 0; i < (int) hello->kshm_nips; i++)
+ hello->kshm_ips[i] = __cpu_to_le32(hello->kshm_ips[i]);
rc = lnet_sock_write(sock, hello->kshm_ips,
hello->kshm_nips * sizeof(__u32),
lnet_acceptor_timeout());
- if (rc != 0) {
+ if (rc) {
CNETERR("Error %d sending HELLO payload (%d) to %pI4h/%d\n",
rc, hello->kshm_nips,
&conn->ksnc_ipaddr, conn->ksnc_port);
@@ -532,10 +529,10 @@ ksocknal_send_hello_v2(ksock_conn_t *conn, ksock_hello_msg_t *hello)
hello->kshm_magic = LNET_PROTO_MAGIC;
hello->kshm_version = conn->ksnc_proto->pro_version;
- if (the_lnet.ln_testprotocompat != 0) {
+ if (the_lnet.ln_testprotocompat) {
/* single-shot proto check */
LNET_LOCK();
- if ((the_lnet.ln_testprotocompat & 1) != 0) {
+ if (the_lnet.ln_testprotocompat & 1) {
hello->kshm_version++; /* just different! */
the_lnet.ln_testprotocompat &= ~1;
}
@@ -544,19 +541,19 @@ ksocknal_send_hello_v2(ksock_conn_t *conn, ksock_hello_msg_t *hello)
rc = lnet_sock_write(sock, hello, offsetof(ksock_hello_msg_t, kshm_ips),
lnet_acceptor_timeout());
- if (rc != 0) {
+ if (rc) {
CNETERR("Error %d sending HELLO hdr to %pI4h/%d\n",
rc, &conn->ksnc_ipaddr, conn->ksnc_port);
return rc;
}
- if (hello->kshm_nips == 0)
+ if (!hello->kshm_nips)
return 0;
rc = lnet_sock_write(sock, hello->kshm_ips,
hello->kshm_nips * sizeof(__u32),
lnet_acceptor_timeout());
- if (rc != 0) {
+ if (rc) {
CNETERR("Error %d sending HELLO payload (%d) to %pI4h/%d\n",
rc, hello->kshm_nips,
&conn->ksnc_ipaddr, conn->ksnc_port);
@@ -575,7 +572,7 @@ ksocknal_recv_hello_v1(ksock_conn_t *conn, ksock_hello_msg_t *hello,
int i;
LIBCFS_ALLOC(hdr, sizeof(*hdr));
- if (hdr == NULL) {
+ if (!hdr) {
CERROR("Can't allocate lnet_hdr_t\n");
return -ENOMEM;
}
@@ -583,15 +580,15 @@ ksocknal_recv_hello_v1(ksock_conn_t *conn, ksock_hello_msg_t *hello,
rc = lnet_sock_read(sock, &hdr->src_nid,
sizeof(*hdr) - offsetof(lnet_hdr_t, src_nid),
timeout);
- if (rc != 0) {
+ if (rc) {
CERROR("Error %d reading rest of HELLO hdr from %pI4h\n",
- rc, &conn->ksnc_ipaddr);
+ rc, &conn->ksnc_ipaddr);
LASSERT(rc < 0 && rc != -EALREADY);
goto out;
}
/* ...and check we got what we expected */
- if (hdr->type != cpu_to_le32 (LNET_MSG_HELLO)) {
+ if (hdr->type != cpu_to_le32(LNET_MSG_HELLO)) {
CERROR("Expecting a HELLO hdr, but got type %d from %pI4h\n",
le32_to_cpu(hdr->type),
&conn->ksnc_ipaddr);
@@ -613,14 +610,14 @@ ksocknal_recv_hello_v1(ksock_conn_t *conn, ksock_hello_msg_t *hello,
goto out;
}
- if (hello->kshm_nips == 0)
+ if (!hello->kshm_nips)
goto out;
rc = lnet_sock_read(sock, hello->kshm_ips,
hello->kshm_nips * sizeof(__u32), timeout);
- if (rc != 0) {
+ if (rc) {
CERROR("Error %d reading IPs from ip %pI4h\n",
- rc, &conn->ksnc_ipaddr);
+ rc, &conn->ksnc_ipaddr);
LASSERT(rc < 0 && rc != -EALREADY);
goto out;
}
@@ -628,7 +625,7 @@ ksocknal_recv_hello_v1(ksock_conn_t *conn, ksock_hello_msg_t *hello,
for (i = 0; i < (int) hello->kshm_nips; i++) {
hello->kshm_ips[i] = __le32_to_cpu(hello->kshm_ips[i]);
- if (hello->kshm_ips[i] == 0) {
+ if (!hello->kshm_ips[i]) {
CERROR("Zero IP[%d] from ip %pI4h\n",
i, &conn->ksnc_ipaddr);
rc = -EPROTO;
@@ -657,9 +654,9 @@ ksocknal_recv_hello_v2(ksock_conn_t *conn, ksock_hello_msg_t *hello, int timeout
offsetof(ksock_hello_msg_t, kshm_ips) -
offsetof(ksock_hello_msg_t, kshm_src_nid),
timeout);
- if (rc != 0) {
+ if (rc) {
CERROR("Error %d reading HELLO from %pI4h\n",
- rc, &conn->ksnc_ipaddr);
+ rc, &conn->ksnc_ipaddr);
LASSERT(rc < 0 && rc != -EALREADY);
return rc;
}
@@ -681,14 +678,14 @@ ksocknal_recv_hello_v2(ksock_conn_t *conn, ksock_hello_msg_t *hello, int timeout
return -EPROTO;
}
- if (hello->kshm_nips == 0)
+ if (!hello->kshm_nips)
return 0;
rc = lnet_sock_read(sock, hello->kshm_ips,
hello->kshm_nips * sizeof(__u32), timeout);
- if (rc != 0) {
+ if (rc) {
CERROR("Error %d reading IPs from ip %pI4h\n",
- rc, &conn->ksnc_ipaddr);
+ rc, &conn->ksnc_ipaddr);
LASSERT(rc < 0 && rc != -EALREADY);
return rc;
}
@@ -697,7 +694,7 @@ ksocknal_recv_hello_v2(ksock_conn_t *conn, ksock_hello_msg_t *hello, int timeout
if (conn->ksnc_flip)
__swab32s(&hello->kshm_ips[i]);
- if (hello->kshm_ips[i] == 0) {
+ if (!hello->kshm_ips[i]) {
CERROR("Zero IP[%d] from ip %pI4h\n",
i, &conn->ksnc_ipaddr);
return -EPROTO;
@@ -712,12 +709,13 @@ ksocknal_pack_msg_v1(ksock_tx_t *tx)
{
/* V1.x has no KSOCK_MSG_NOOP */
LASSERT(tx->tx_msg.ksm_type != KSOCK_MSG_NOOP);
- LASSERT(tx->tx_lnetmsg != NULL);
+ LASSERT(tx->tx_lnetmsg);
tx->tx_iov[0].iov_base = &tx->tx_lnetmsg->msg_hdr;
tx->tx_iov[0].iov_len = sizeof(lnet_hdr_t);
- tx->tx_resid = tx->tx_nob = tx->tx_lnetmsg->msg_len + sizeof(lnet_hdr_t);
+ tx->tx_nob = tx->tx_lnetmsg->msg_len + sizeof(lnet_hdr_t);
+ tx->tx_resid = tx->tx_lnetmsg->msg_len + sizeof(lnet_hdr_t);
}
static void
@@ -725,17 +723,19 @@ ksocknal_pack_msg_v2(ksock_tx_t *tx)
{
tx->tx_iov[0].iov_base = &tx->tx_msg;
- if (tx->tx_lnetmsg != NULL) {
+ if (tx->tx_lnetmsg) {
LASSERT(tx->tx_msg.ksm_type != KSOCK_MSG_NOOP);
tx->tx_msg.ksm_u.lnetmsg.ksnm_hdr = tx->tx_lnetmsg->msg_hdr;
tx->tx_iov[0].iov_len = sizeof(ksock_msg_t);
- tx->tx_resid = tx->tx_nob = sizeof(ksock_msg_t) + tx->tx_lnetmsg->msg_len;
+ tx->tx_nob = sizeof(ksock_msg_t) + tx->tx_lnetmsg->msg_len;
+ tx->tx_resid = sizeof(ksock_msg_t) + tx->tx_lnetmsg->msg_len;
} else {
LASSERT(tx->tx_msg.ksm_type == KSOCK_MSG_NOOP);
tx->tx_iov[0].iov_len = offsetof(ksock_msg_t, ksm_u.lnetmsg.ksnm_hdr);
- tx->tx_resid = tx->tx_nob = offsetof(ksock_msg_t, ksm_u.lnetmsg.ksnm_hdr);
+ tx->tx_nob = offsetof(ksock_msg_t, ksm_u.lnetmsg.ksnm_hdr);
+ tx->tx_resid = offsetof(ksock_msg_t, ksm_u.lnetmsg.ksnm_hdr);
}
/* Don't checksum before start sending, because packet can be piggybacked with ACK */
}
@@ -745,7 +745,8 @@ ksocknal_unpack_msg_v1(ksock_msg_t *msg)
{
msg->ksm_csum = 0;
msg->ksm_type = KSOCK_MSG_LNET;
- msg->ksm_zc_cookies[0] = msg->ksm_zc_cookies[1] = 0;
+ msg->ksm_zc_cookies[0] = 0;
+ msg->ksm_zc_cookies[1] = 0;
}
static void