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authorDavid S. Miller <davem@davemloft.net>2019-02-07 18:06:19 -0800
committerDavid S. Miller <davem@davemloft.net>2019-02-07 18:06:19 -0800
commitf06f095f3294f8e6357bd2ec30844f125981bc6a (patch)
tree4789334e9cd775ba44fc17f163f450d279b72a87
parentnet: vxlan: Free a leaked vetoed multicast rdst (diff)
parentnet/smc: original socket family in inet_sock_diag (diff)
downloadlinux-dev-f06f095f3294f8e6357bd2ec30844f125981bc6a.tar.xz
linux-dev-f06f095f3294f8e6357bd2ec30844f125981bc6a.zip
Merge branch 'smc-next'
Ursula Braun says: ==================== net/smc: patches 2019-02-07 here are patches for SMC: * patches 1, 3, and 6 are cleanups without functional change * patch 2 postpones closing of internal clcsock * patches 4 and 5 improve link group creation locking * patch 7 restores AF_SMC as diag_family field ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--arch/s390/include/asm/pnet.h8
-rw-r--r--arch/s390/net/pnet.c8
-rw-r--r--net/smc/af_smc.c85
-rw-r--r--net/smc/smc_cdc.h9
-rw-r--r--net/smc/smc_close.c7
-rw-r--r--net/smc/smc_core.c5
-rw-r--r--net/smc/smc_diag.c3
7 files changed, 74 insertions, 51 deletions
diff --git a/arch/s390/include/asm/pnet.h b/arch/s390/include/asm/pnet.h
index 6e278584f8f1..5739276b458d 100644
--- a/arch/s390/include/asm/pnet.h
+++ b/arch/s390/include/asm/pnet.h
@@ -11,13 +11,5 @@
#include <linux/device.h>
#include <linux/types.h>
-#define PNETIDS_LEN 64 /* Total utility string length in bytes
- * to cover up to 4 PNETIDs of 16 bytes
- * for up to 4 device ports
- */
-#define MAX_PNETID_LEN 16 /* Max.length of a single port PNETID */
-#define MAX_PNETID_PORTS (PNETIDS_LEN / MAX_PNETID_LEN)
- /* Max. # of ports with a PNETID */
-
int pnet_id_by_dev_port(struct device *dev, unsigned short port, u8 *pnetid);
#endif /* _ASM_S390_PNET_H */
diff --git a/arch/s390/net/pnet.c b/arch/s390/net/pnet.c
index e22f1b10a6c7..9ecdbdf59781 100644
--- a/arch/s390/net/pnet.c
+++ b/arch/s390/net/pnet.c
@@ -13,6 +13,14 @@
#include <asm/ccwdev.h>
#include <asm/pnet.h>
+#define PNETIDS_LEN 64 /* Total utility string length in bytes
+ * to cover up to 4 PNETIDs of 16 bytes
+ * for up to 4 device ports
+ */
+#define MAX_PNETID_LEN 16 /* Max.length of a single port PNETID */
+#define MAX_PNETID_PORTS (PNETIDS_LEN / MAX_PNETID_LEN)
+ /* Max. # of ports with a PNETID */
+
/*
* Get the PNETIDs from a device.
* s390 hardware supports the definition of a so-called Physical Network
diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c
index 369870b0ef79..48ea7669161f 100644
--- a/net/smc/af_smc.c
+++ b/net/smc/af_smc.c
@@ -42,8 +42,11 @@
#include "smc_rx.h"
#include "smc_close.h"
-static DEFINE_MUTEX(smc_create_lgr_pending); /* serialize link group
- * creation
+static DEFINE_MUTEX(smc_server_lgr_pending); /* serialize link group
+ * creation on server
+ */
+static DEFINE_MUTEX(smc_client_lgr_pending); /* serialize link group
+ * creation on client
*/
static void smc_tcp_listen_work(struct work_struct *);
@@ -145,32 +148,33 @@ static int smc_release(struct socket *sock)
rc = smc_close_active(smc);
sock_set_flag(sk, SOCK_DEAD);
sk->sk_shutdown |= SHUTDOWN_MASK;
- }
-
- sk->sk_prot->unhash(sk);
-
- if (smc->clcsock) {
- if (smc->use_fallback && sk->sk_state == SMC_LISTEN) {
+ } else {
+ if (sk->sk_state != SMC_LISTEN && sk->sk_state != SMC_INIT)
+ sock_put(sk); /* passive closing */
+ if (sk->sk_state == SMC_LISTEN) {
/* wake up clcsock accept */
rc = kernel_sock_shutdown(smc->clcsock, SHUT_RDWR);
}
- mutex_lock(&smc->clcsock_release_lock);
- sock_release(smc->clcsock);
- smc->clcsock = NULL;
- mutex_unlock(&smc->clcsock_release_lock);
- }
- if (smc->use_fallback) {
- if (sk->sk_state != SMC_LISTEN && sk->sk_state != SMC_INIT)
- sock_put(sk); /* passive closing */
sk->sk_state = SMC_CLOSED;
sk->sk_state_change(sk);
}
+ sk->sk_prot->unhash(sk);
+
+ if (sk->sk_state == SMC_CLOSED) {
+ if (smc->clcsock) {
+ mutex_lock(&smc->clcsock_release_lock);
+ sock_release(smc->clcsock);
+ smc->clcsock = NULL;
+ mutex_unlock(&smc->clcsock_release_lock);
+ }
+ if (!smc->use_fallback)
+ smc_conn_free(&smc->conn);
+ }
+
/* detach socket */
sock_orphan(sk);
sock->sk = NULL;
- if (!smc->use_fallback && sk->sk_state == SMC_CLOSED)
- smc_conn_free(&smc->conn);
release_sock(sk);
sock_put(sk); /* final sock_put */
@@ -476,7 +480,12 @@ static int smc_connect_abort(struct smc_sock *smc, int reason_code,
{
if (local_contact == SMC_FIRST_CONTACT)
smc_lgr_forget(smc->conn.lgr);
- mutex_unlock(&smc_create_lgr_pending);
+ if (smc->conn.lgr->is_smcd)
+ /* there is only one lgr role for SMC-D; use server lock */
+ mutex_unlock(&smc_server_lgr_pending);
+ else
+ mutex_unlock(&smc_client_lgr_pending);
+
smc_conn_free(&smc->conn);
return reason_code;
}
@@ -561,7 +570,7 @@ static int smc_connect_rdma(struct smc_sock *smc,
struct smc_link *link;
int reason_code = 0;
- mutex_lock(&smc_create_lgr_pending);
+ mutex_lock(&smc_client_lgr_pending);
local_contact = smc_conn_create(smc, false, aclc->hdr.flag, ibdev,
ibport, ntoh24(aclc->qpn), &aclc->lcl,
NULL, 0);
@@ -572,7 +581,8 @@ static int smc_connect_rdma(struct smc_sock *smc,
reason_code = SMC_CLC_DECL_SYNCERR; /* synchr. error */
else
reason_code = SMC_CLC_DECL_INTERR; /* other error */
- return smc_connect_abort(smc, reason_code, 0);
+ mutex_unlock(&smc_client_lgr_pending);
+ return reason_code;
}
link = &smc->conn.lgr->lnk[SMC_SINGLE_LINK];
@@ -616,7 +626,7 @@ static int smc_connect_rdma(struct smc_sock *smc,
return smc_connect_abort(smc, reason_code,
local_contact);
}
- mutex_unlock(&smc_create_lgr_pending);
+ mutex_unlock(&smc_client_lgr_pending);
smc_copy_sock_settings_to_clc(smc);
if (smc->sk.sk_state == SMC_INIT)
@@ -633,11 +643,14 @@ static int smc_connect_ism(struct smc_sock *smc,
int local_contact = SMC_FIRST_CONTACT;
int rc = 0;
- mutex_lock(&smc_create_lgr_pending);
+ /* there is only one lgr role for SMC-D; use server lock */
+ mutex_lock(&smc_server_lgr_pending);
local_contact = smc_conn_create(smc, true, aclc->hdr.flag, NULL, 0, 0,
NULL, ismdev, aclc->gid);
- if (local_contact < 0)
- return smc_connect_abort(smc, SMC_CLC_DECL_MEM, 0);
+ if (local_contact < 0) {
+ mutex_unlock(&smc_server_lgr_pending);
+ return SMC_CLC_DECL_MEM;
+ }
/* Create send and receive buffers */
if (smc_buf_create(smc, true))
@@ -651,7 +664,7 @@ static int smc_connect_ism(struct smc_sock *smc,
rc = smc_clc_send_confirm(smc);
if (rc)
return smc_connect_abort(smc, rc, local_contact);
- mutex_unlock(&smc_create_lgr_pending);
+ mutex_unlock(&smc_server_lgr_pending);
smc_copy_sock_settings_to_clc(smc);
if (smc->sk.sk_state == SMC_INIT)
@@ -1250,7 +1263,7 @@ static void smc_listen_work(struct work_struct *work)
return;
}
- mutex_lock(&smc_create_lgr_pending);
+ mutex_lock(&smc_server_lgr_pending);
smc_close_init(new_smc);
smc_rx_init(new_smc);
smc_tx_init(new_smc);
@@ -1272,7 +1285,7 @@ static void smc_listen_work(struct work_struct *work)
&local_contact) ||
smc_listen_rdma_reg(new_smc, local_contact))) {
/* SMC not supported, decline */
- mutex_unlock(&smc_create_lgr_pending);
+ mutex_unlock(&smc_server_lgr_pending);
smc_listen_decline(new_smc, SMC_CLC_DECL_MODEUNSUPP,
local_contact);
return;
@@ -1281,29 +1294,33 @@ static void smc_listen_work(struct work_struct *work)
/* send SMC Accept CLC message */
rc = smc_clc_send_accept(new_smc, local_contact);
if (rc) {
- mutex_unlock(&smc_create_lgr_pending);
+ mutex_unlock(&smc_server_lgr_pending);
smc_listen_decline(new_smc, rc, local_contact);
return;
}
+ /* SMC-D does not need this lock any more */
+ if (ism_supported)
+ mutex_unlock(&smc_server_lgr_pending);
+
/* receive SMC Confirm CLC message */
reason_code = smc_clc_wait_msg(new_smc, &cclc, sizeof(cclc),
SMC_CLC_CONFIRM, CLC_WAIT_TIME);
if (reason_code) {
- mutex_unlock(&smc_create_lgr_pending);
+ if (!ism_supported)
+ mutex_unlock(&smc_server_lgr_pending);
smc_listen_decline(new_smc, reason_code, local_contact);
return;
}
/* finish worker */
if (!ism_supported) {
- if (smc_listen_rdma_finish(new_smc, &cclc, local_contact)) {
- mutex_unlock(&smc_create_lgr_pending);
+ rc = smc_listen_rdma_finish(new_smc, &cclc, local_contact);
+ mutex_unlock(&smc_server_lgr_pending);
+ if (rc)
return;
- }
}
smc_conn_save_peer_info(new_smc, &cclc);
- mutex_unlock(&smc_create_lgr_pending);
smc_listen_out_connected(new_smc);
}
diff --git a/net/smc/smc_cdc.h b/net/smc/smc_cdc.h
index b5bfe38c7f9b..e8c214b992b6 100644
--- a/net/smc/smc_cdc.h
+++ b/net/smc/smc_cdc.h
@@ -245,17 +245,18 @@ static inline void smcr_cdc_msg_to_host(struct smc_host_cdc_msg *local,
}
static inline void smcd_cdc_msg_to_host(struct smc_host_cdc_msg *local,
- struct smcd_cdc_msg *peer)
+ struct smcd_cdc_msg *peer,
+ struct smc_connection *conn)
{
union smc_host_cursor temp;
temp.wrap = peer->prod.wrap;
temp.count = peer->prod.count;
- atomic64_set(&local->prod.acurs, atomic64_read(&temp.acurs));
+ smc_curs_copy(&local->prod, &temp, conn);
temp.wrap = peer->cons.wrap;
temp.count = peer->cons.count;
- atomic64_set(&local->cons.acurs, atomic64_read(&temp.acurs));
+ smc_curs_copy(&local->cons, &temp, conn);
local->prod_flags = peer->cons.prod_flags;
local->conn_state_flags = peer->cons.conn_state_flags;
}
@@ -265,7 +266,7 @@ static inline void smc_cdc_msg_to_host(struct smc_host_cdc_msg *local,
struct smc_connection *conn)
{
if (conn->lgr->is_smcd)
- smcd_cdc_msg_to_host(local, (struct smcd_cdc_msg *)peer);
+ smcd_cdc_msg_to_host(local, (struct smcd_cdc_msg *)peer, conn);
else
smcr_cdc_msg_to_host(local, peer, conn);
}
diff --git a/net/smc/smc_close.c b/net/smc/smc_close.c
index ea2b87f29469..0e60dd741698 100644
--- a/net/smc/smc_close.c
+++ b/net/smc/smc_close.c
@@ -405,8 +405,13 @@ wakeup:
if (old_state != sk->sk_state) {
sk->sk_state_change(sk);
if ((sk->sk_state == SMC_CLOSED) &&
- (sock_flag(sk, SOCK_DEAD) || !sk->sk_socket))
+ (sock_flag(sk, SOCK_DEAD) || !sk->sk_socket)) {
smc_conn_free(conn);
+ if (smc->clcsock) {
+ sock_release(smc->clcsock);
+ smc->clcsock = NULL;
+ }
+ }
}
release_sock(sk);
sock_put(sk); /* sock_hold done by schedulers of close_work */
diff --git a/net/smc/smc_core.c b/net/smc/smc_core.c
index 35c1cdc93e1c..a1a6d351ae1b 100644
--- a/net/smc/smc_core.c
+++ b/net/smc/smc_core.c
@@ -118,7 +118,6 @@ static void __smc_lgr_unregister_conn(struct smc_connection *conn)
rb_erase(&conn->alert_node, &lgr->conns_all);
lgr->conns_num--;
conn->alert_token_local = 0;
- conn->lgr = NULL;
sock_put(&smc->sk); /* sock_hold in smc_lgr_register_conn() */
}
@@ -331,8 +330,9 @@ void smc_conn_free(struct smc_connection *conn)
} else {
smc_cdc_tx_dismiss_slots(conn);
}
- smc_lgr_unregister_conn(conn); /* unsets conn->lgr */
+ smc_lgr_unregister_conn(conn);
smc_buf_unuse(conn, lgr); /* allow buffer reuse */
+ conn->lgr = NULL;
if (!lgr->conns_num)
smc_lgr_schedule_free_work(lgr);
@@ -462,6 +462,7 @@ static void __smc_lgr_terminate(struct smc_link_group *lgr)
sock_hold(&smc->sk); /* sock_put in close work */
conn->local_tx_ctrl.conn_state_flags.peer_conn_abort = 1;
__smc_lgr_unregister_conn(conn);
+ conn->lgr = NULL;
write_unlock_bh(&lgr->conns_lock);
if (!schedule_work(&conn->close_work))
sock_put(&smc->sk);
diff --git a/net/smc/smc_diag.c b/net/smc/smc_diag.c
index dbf64a93d68a..371b4cf31fcd 100644
--- a/net/smc/smc_diag.c
+++ b/net/smc/smc_diag.c
@@ -38,6 +38,7 @@ static void smc_diag_msg_common_fill(struct smc_diag_msg *r, struct sock *sk)
{
struct smc_sock *smc = smc_sk(sk);
+ r->diag_family = sk->sk_family;
if (!smc->clcsock)
return;
r->id.idiag_sport = htons(smc->clcsock->sk->sk_num);
@@ -45,14 +46,12 @@ static void smc_diag_msg_common_fill(struct smc_diag_msg *r, struct sock *sk)
r->id.idiag_if = smc->clcsock->sk->sk_bound_dev_if;
sock_diag_save_cookie(sk, r->id.idiag_cookie);
if (sk->sk_protocol == SMCPROTO_SMC) {
- r->diag_family = PF_INET;
memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src));
memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst));
r->id.idiag_src[0] = smc->clcsock->sk->sk_rcv_saddr;
r->id.idiag_dst[0] = smc->clcsock->sk->sk_daddr;
#if IS_ENABLED(CONFIG_IPV6)
} else if (sk->sk_protocol == SMCPROTO_SMC6) {
- r->diag_family = PF_INET6;
memcpy(&r->id.idiag_src, &smc->clcsock->sk->sk_v6_rcv_saddr,
sizeof(smc->clcsock->sk->sk_v6_rcv_saddr));
memcpy(&r->id.idiag_dst, &smc->clcsock->sk->sk_v6_daddr,