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Merge branch 'smc-bug-fixes'

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Ursula Braun says:

====================
net/smc: bug fixes 2017-09-20

here is a collection of small smc-patches built for net fixing
smc problems in different areas.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2017-09-21 15:31:03 -07:00
commit 5d6b66c031
11 changed files with 58 additions and 37 deletions
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16
net/smc/af_smc.c
View file

@ -282,6 +282,7 @@ int smc_netinfo_by_tcpsk(struct socket *clcsock,
__be32 *subnet, u8 *prefix_len)
{
struct dst_entry *dst = sk_dst_get(clcsock->sk);
struct in_device *in_dev;
struct sockaddr_in addr;
int rc = -ENOENT;
int len;
@ -298,14 +299,17 @@ int smc_netinfo_by_tcpsk(struct socket *clcsock,
/* get address to which the internal TCP socket is bound */
kernel_getsockname(clcsock, (struct sockaddr *)&addr, &len);
/* analyze IPv4 specific data of net_device belonging to TCP socket */
for_ifa(dst->dev->ip_ptr) {
if (ifa->ifa_address != addr.sin_addr.s_addr)
rcu_read_lock();
in_dev = __in_dev_get_rcu(dst->dev);
for_ifa(in_dev) {
if (!inet_ifa_match(addr.sin_addr.s_addr, ifa))
continue;
*prefix_len = inet_mask_len(ifa->ifa_mask);
*subnet = ifa->ifa_address & ifa->ifa_mask;
rc = 0;
break;
} endfor_ifa(dst->dev->ip_ptr);
} endfor_ifa(in_dev);
rcu_read_unlock();
out_rel:
dst_release(dst);
@ -509,7 +513,7 @@ static int smc_connect_rdma(struct smc_sock *smc)
/* RDMA setup failed, switch back to TCP */
smc->use_fallback = true;
if (reason_code && (reason_code != SMC_CLC_DECL_REPLY)) {
rc = smc_clc_send_decline(smc, reason_code, 0);
rc = smc_clc_send_decline(smc, reason_code);
if (rc < sizeof(struct smc_clc_msg_decline))
goto out_err;
}
@ -804,8 +808,6 @@ static void smc_listen_work(struct work_struct *work)
rc = local_contact;
if (rc == -ENOMEM)
reason_code = SMC_CLC_DECL_MEM;/* insufficient memory*/
else if (rc == -ENOLINK)
reason_code = SMC_CLC_DECL_SYNCERR; /* synchr. error */
goto decline_rdma;
}
link = &new_smc->conn.lgr->lnk[SMC_SINGLE_LINK];
@ -899,7 +901,7 @@ static void smc_listen_work(struct work_struct *work)
smc_conn_free(&new_smc->conn);
new_smc->use_fallback = true;
if (reason_code && (reason_code != SMC_CLC_DECL_REPLY)) {
rc = smc_clc_send_decline(new_smc, reason_code, 0);
rc = smc_clc_send_decline(new_smc, reason_code);
if (rc < sizeof(struct smc_clc_msg_decline))
goto out_err;
}

2
net/smc/smc.h
View file

@ -149,7 +149,7 @@ struct smc_connection {
atomic_t sndbuf_space; /* remaining space in sndbuf */
u16 tx_cdc_seq; /* sequence # for CDC send */
spinlock_t send_lock; /* protect wr_sends */
struct work_struct tx_work; /* retry of smc_cdc_msg_send */
struct delayed_work tx_work; /* retry of smc_cdc_msg_send */
struct smc_host_cdc_msg local_rx_ctrl; /* filled during event_handl.
* .prod cf. TCP rcv_nxt

10
net/smc/smc_clc.c
View file

@ -95,9 +95,10 @@ int smc_clc_wait_msg(struct smc_sock *smc, void *buf, int buflen,
}
if (clcm->type == SMC_CLC_DECLINE) {
reason_code = SMC_CLC_DECL_REPLY;
if (ntohl(((struct smc_clc_msg_decline *)buf)->peer_diagnosis)
== SMC_CLC_DECL_SYNCERR)
if (((struct smc_clc_msg_decline *)buf)->hdr.flag) {
smc->conn.lgr->sync_err = true;
smc_lgr_terminate(smc->conn.lgr);
}
}
out:
@ -105,8 +106,7 @@ int smc_clc_wait_msg(struct smc_sock *smc, void *buf, int buflen,
}
/* send CLC DECLINE message across internal TCP socket */
int smc_clc_send_decline(struct smc_sock *smc, u32 peer_diag_info,
u8 out_of_sync)
int smc_clc_send_decline(struct smc_sock *smc, u32 peer_diag_info)
{
struct smc_clc_msg_decline dclc;
struct msghdr msg;
@ -118,7 +118,7 @@ int smc_clc_send_decline(struct smc_sock *smc, u32 peer_diag_info,
dclc.hdr.type = SMC_CLC_DECLINE;
dclc.hdr.length = htons(sizeof(struct smc_clc_msg_decline));
dclc.hdr.version = SMC_CLC_V1;
dclc.hdr.flag = out_of_sync ? 1 : 0;
dclc.hdr.flag = (peer_diag_info == SMC_CLC_DECL_SYNCERR) ? 1 : 0;
memcpy(dclc.id_for_peer, local_systemid, sizeof(local_systemid));
dclc.peer_diagnosis = htonl(peer_diag_info);
memcpy(dclc.trl.eyecatcher, SMC_EYECATCHER, sizeof(SMC_EYECATCHER));

3
net/smc/smc_clc.h
View file

@ -106,8 +106,7 @@ struct smc_ib_device;
int smc_clc_wait_msg(struct smc_sock *smc, void *buf, int buflen,
u8 expected_type);
int smc_clc_send_decline(struct smc_sock *smc, u32 peer_diag_info,
u8 out_of_sync);
int smc_clc_send_decline(struct smc_sock *smc, u32 peer_diag_info);
int smc_clc_send_proposal(struct smc_sock *smc, struct smc_ib_device *smcibdev,
u8 ibport);
int smc_clc_send_confirm(struct smc_sock *smc);

27
net/smc/smc_close.c
View file

@ -174,15 +174,15 @@ int smc_close_active(struct smc_sock *smc)
{
struct smc_cdc_conn_state_flags *txflags =
&smc->conn.local_tx_ctrl.conn_state_flags;
long timeout = SMC_MAX_STREAM_WAIT_TIMEOUT;
struct smc_connection *conn = &smc->conn;
struct sock *sk = &smc->sk;
int old_state;
long timeout;
int rc = 0;
if (sock_flag(sk, SOCK_LINGER) &&
!(current->flags & PF_EXITING))
timeout = sk->sk_lingertime;
timeout = current->flags & PF_EXITING ?
0 : sock_flag(sk, SOCK_LINGER) ?
sk->sk_lingertime : SMC_MAX_STREAM_WAIT_TIMEOUT;
again:
old_state = sk->sk_state;
@ -208,7 +208,7 @@ int smc_close_active(struct smc_sock *smc)
case SMC_ACTIVE:
smc_close_stream_wait(smc, timeout);
release_sock(sk);
cancel_work_sync(&conn->tx_work);
cancel_delayed_work_sync(&conn->tx_work);
lock_sock(sk);
if (sk->sk_state == SMC_ACTIVE) {
/* send close request */
@ -234,7 +234,7 @@ int smc_close_active(struct smc_sock *smc)
if (!smc_cdc_rxed_any_close(conn))
smc_close_stream_wait(smc, timeout);
release_sock(sk);
cancel_work_sync(&conn->tx_work);
cancel_delayed_work_sync(&conn->tx_work);
lock_sock(sk);
if (sk->sk_err != ECONNABORTED) {
/* confirm close from peer */
@ -263,7 +263,9 @@ int smc_close_active(struct smc_sock *smc)
/* peer sending PeerConnectionClosed will cause transition */
break;
case SMC_PROCESSABORT:
cancel_work_sync(&conn->tx_work);
release_sock(sk);
cancel_delayed_work_sync(&conn->tx_work);
lock_sock(sk);
smc_close_abort(conn);
sk->sk_state = SMC_CLOSED;
smc_close_wait_tx_pends(smc);
@ -411,13 +413,14 @@ void smc_close_sock_put_work(struct work_struct *work)
int smc_close_shutdown_write(struct smc_sock *smc)
{
struct smc_connection *conn = &smc->conn;
long timeout = SMC_MAX_STREAM_WAIT_TIMEOUT;
struct sock *sk = &smc->sk;
int old_state;
long timeout;
int rc = 0;
if (sock_flag(sk, SOCK_LINGER))
timeout = sk->sk_lingertime;
timeout = current->flags & PF_EXITING ?
0 : sock_flag(sk, SOCK_LINGER) ?
sk->sk_lingertime : SMC_MAX_STREAM_WAIT_TIMEOUT;
again:
old_state = sk->sk_state;
@ -425,7 +428,7 @@ int smc_close_shutdown_write(struct smc_sock *smc)
case SMC_ACTIVE:
smc_close_stream_wait(smc, timeout);
release_sock(sk);
cancel_work_sync(&conn->tx_work);
cancel_delayed_work_sync(&conn->tx_work);
lock_sock(sk);
/* send close wr request */
rc = smc_close_wr(conn);
@ -439,7 +442,7 @@ int smc_close_shutdown_write(struct smc_sock *smc)
if (!smc_cdc_rxed_any_close(conn))
smc_close_stream_wait(smc, timeout);
release_sock(sk);
cancel_work_sync(&conn->tx_work);
cancel_delayed_work_sync(&conn->tx_work);
lock_sock(sk);
/* confirm close from peer */
rc = smc_close_wr(conn);

16
net/smc/smc_core.c
View file

@ -25,8 +25,9 @@
#include "smc_cdc.h"
#include "smc_close.h"
#define SMC_LGR_NUM_INCR 256
#define SMC_LGR_FREE_DELAY (600 * HZ)
#define SMC_LGR_NUM_INCR 256
#define SMC_LGR_FREE_DELAY_SERV (600 * HZ)
#define SMC_LGR_FREE_DELAY_CLNT (SMC_LGR_FREE_DELAY_SERV + 10)
static u32 smc_lgr_num; /* unique link group number */
@ -107,8 +108,15 @@ static void smc_lgr_unregister_conn(struct smc_connection *conn)
__smc_lgr_unregister_conn(conn);
}
write_unlock_bh(&lgr->conns_lock);
if (reduced && !lgr->conns_num)
schedule_delayed_work(&lgr->free_work, SMC_LGR_FREE_DELAY);
if (!reduced || lgr->conns_num)
return;
/* client link group creation always follows the server link group
* creation. For client use a somewhat higher removal delay time,
* otherwise there is a risk of out-of-sync link groups.
*/
mod_delayed_work(system_wq, &lgr->free_work,
lgr->role == SMC_CLNT ? SMC_LGR_FREE_DELAY_CLNT :
SMC_LGR_FREE_DELAY_SERV);
}
static void smc_lgr_free_work(struct work_struct *work)

1
net/smc/smc_ib.c
View file

@ -380,6 +380,7 @@ static int smc_ib_fill_gid_and_mac(struct smc_ib_device *smcibdev, u8 ibport)
ndev = smcibdev->ibdev->get_netdev(smcibdev->ibdev, ibport);
if (ndev) {
memcpy(&smcibdev->mac, ndev->dev_addr, ETH_ALEN);
dev_put(ndev);
} else if (!rc) {
memcpy(&smcibdev->mac[ibport - 1][0],
&smcibdev->gid[ibport - 1].raw[8], 3);

4
net/smc/smc_pnet.c
View file

@ -181,8 +181,10 @@ static int smc_pnet_enter(struct smc_pnetentry *new_pnetelem)
sizeof(new_pnetelem->ndev->name)) ||
smc_pnet_same_ibname(pnetelem,
new_pnetelem->smcibdev->ibdev->name,
new_pnetelem->ib_port))
new_pnetelem->ib_port)) {
dev_put(pnetelem->ndev);
goto found;
}
}
list_add_tail(&new_pnetelem->list, &smc_pnettable.pnetlist);
rc = 0;

2
net/smc/smc_rx.c
View file

@ -148,6 +148,8 @@ int smc_rx_recvmsg(struct smc_sock *smc, struct msghdr *msg, size_t len,
read_done = sock_intr_errno(timeo);
break;
}
if (!timeo)
return -EAGAIN;
}
if (!atomic_read(&conn->bytes_to_rcv)) {

12
net/smc/smc_tx.c
View file

@ -24,6 +24,8 @@
#include "smc_cdc.h"
#include "smc_tx.h"
#define SMC_TX_WORK_DELAY HZ
/***************************** sndbuf producer *******************************/
/* callback implementation for sk.sk_write_space()
@ -406,7 +408,8 @@ int smc_tx_sndbuf_nonempty(struct smc_connection *conn)
goto out_unlock;
}
rc = 0;
schedule_work(&conn->tx_work);
schedule_delayed_work(&conn->tx_work,
SMC_TX_WORK_DELAY);
}
goto out_unlock;
}
@ -430,7 +433,7 @@ int smc_tx_sndbuf_nonempty(struct smc_connection *conn)
*/
static void smc_tx_work(struct work_struct *work)
{
struct smc_connection *conn = container_of(work,
struct smc_connection *conn = container_of(to_delayed_work(work),
struct smc_connection,
tx_work);
struct smc_sock *smc = container_of(conn, struct smc_sock, conn);
@ -468,7 +471,8 @@ void smc_tx_consumer_update(struct smc_connection *conn)
if (!rc)
rc = smc_cdc_msg_send(conn, wr_buf, pend);
if (rc < 0) {
schedule_work(&conn->tx_work);
schedule_delayed_work(&conn->tx_work,
SMC_TX_WORK_DELAY);
return;
}
smc_curs_write(&conn->rx_curs_confirmed,
@ -487,6 +491,6 @@ void smc_tx_consumer_update(struct smc_connection *conn)
void smc_tx_init(struct smc_sock *smc)
{
smc->sk.sk_write_space = smc_tx_write_space;
INIT_WORK(&smc->conn.tx_work, smc_tx_work);
INIT_DELAYED_WORK(&smc->conn.tx_work, smc_tx_work);
spin_lock_init(&smc->conn.send_lock);
}

2
net/smc/smc_wr.c
View file

@ -244,7 +244,7 @@ int smc_wr_tx_send(struct smc_link *link, struct smc_wr_tx_pend_priv *priv)
int rc;
ib_req_notify_cq(link->smcibdev->roce_cq_send,
IB_CQ_SOLICITED_MASK | IB_CQ_REPORT_MISSED_EVENTS);
IB_CQ_NEXT_COMP | IB_CQ_REPORT_MISSED_EVENTS);
pend = container_of(priv, struct smc_wr_tx_pend, priv);
rc = ib_post_send(link->roce_qp, &link->wr_tx_ibs[pend->idx],
&failed_wr);