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smc: connection data control (CDC) 

send and receive CDC messages (via IB message send and CQE)

Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ursula Braun 2017-01-09 16:55:22 +01:00 committed by David S. Miller
parent 9bf9abead2
commit 5f08318f61
8 changed files with 641 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
net/smc/Makefile
View File

@ -1,2 +1,3 @@
obj-$(CONFIG_SMC) += smc.o
smc-y := af_smc.o smc_pnet.o smc_ib.o smc_clc.o smc_core.o smc_wr.o smc_llc.o
smc-y += smc_cdc.o

9
net/smc/af_smc.c
View File

@ -26,12 +26,14 @@
#include <linux/socket.h>
#include <linux/inetdevice.h>
#include <linux/workqueue.h>
#include <linux/in.h>
#include <net/sock.h>
#include <net/tcp.h>
#include "smc.h"
#include "smc_clc.h"
#include "smc_llc.h"
#include "smc_cdc.h"
#include "smc_core.h"
#include "smc_ib.h"
#include "smc_pnet.h"
@ -285,6 +287,7 @@ static void smc_conn_save_peer_info(struct smc_sock *smc,
struct smc_clc_msg_accept_confirm *clc)
{
smc->conn.peer_conn_idx = clc->conn_idx;
smc->conn.local_tx_ctrl.token = ntohl(clc->rmbe_alert_token);
smc->conn.peer_rmbe_size = smc_uncompress_bufsize(clc->rmbe_size);
atomic_set(&smc->conn.peer_rmbe_space, smc->conn.peer_rmbe_size);
}
@ -1201,6 +1204,12 @@ static int __init smc_init(void)
goto out_pnet;
}
rc = smc_cdc_init();
if (rc) {
pr_err("%s: smc_cdc_init fails with %d\n", __func__, rc);
goto out_pnet;
}
rc = proto_register(&smc_proto, 1);
if (rc) {
pr_err("%s: proto_register fails with %d\n", __func__, rc);

97
net/smc/smc.h
View File

@ -21,6 +21,10 @@
#define SMC_MAX_PORTS 2 /* Max # of ports */
#ifdef ATOMIC64_INIT
#define KERNEL_HAS_ATOMIC64
#endif
enum smc_state { /* possible states of an SMC socket */
SMC_ACTIVE = 1,
SMC_INIT = 2,
@ -34,6 +38,67 @@ struct smc_wr_rx_hdr { /* common prefix part of LLC and CDC to demultiplex */
u8 type;
} __aligned(1);
struct smc_cdc_conn_state_flags {
#if defined(__BIG_ENDIAN_BITFIELD)
u8 peer_done_writing : 1; /* Sending done indicator */
u8 peer_conn_closed : 1; /* Peer connection closed indicator */
u8 peer_conn_abort : 1; /* Abnormal close indicator */
u8 reserved : 5;
#elif defined(__LITTLE_ENDIAN_BITFIELD)
u8 reserved : 5;
u8 peer_conn_abort : 1;
u8 peer_conn_closed : 1;
u8 peer_done_writing : 1;
#endif
};
struct smc_cdc_producer_flags {
#if defined(__BIG_ENDIAN_BITFIELD)
u8 write_blocked : 1; /* Writing Blocked, no rx buf space */
u8 urg_data_pending : 1; /* Urgent Data Pending */
u8 urg_data_present : 1; /* Urgent Data Present */
u8 cons_curs_upd_req : 1; /* cursor update requested */
u8 failover_validation : 1;/* message replay due to failover */
u8 reserved : 3;
#elif defined(__LITTLE_ENDIAN_BITFIELD)
u8 reserved : 3;
u8 failover_validation : 1;
u8 cons_curs_upd_req : 1;
u8 urg_data_present : 1;
u8 urg_data_pending : 1;
u8 write_blocked : 1;
#endif
};
/* in host byte order */
union smc_host_cursor { /* SMC cursor - an offset in an RMBE */
struct {
u16 reserved;
u16 wrap; /* window wrap sequence number */
u32 count; /* cursor (= offset) part */
};
#ifdef KERNEL_HAS_ATOMIC64
atomic64_t acurs; /* for atomic processing */
#else
u64 acurs; /* for atomic processing */
#endif
} __aligned(8);
/* in host byte order, except for flag bitfields in network byte order */
struct smc_host_cdc_msg { /* Connection Data Control message */
struct smc_wr_rx_hdr common; /* .type = 0xFE */
u8 len; /* length = 44 */
u16 seqno; /* connection seq # */
u32 token; /* alert_token */
union smc_host_cursor prod; /* producer cursor */
union smc_host_cursor cons; /* consumer cursor,
* piggy backed "ack"
*/
struct smc_cdc_producer_flags prod_flags; /* conn. tx/rx status */
struct smc_cdc_conn_state_flags conn_state_flags; /* peer conn. status*/
u8 reserved[18];
} __aligned(8);
struct smc_connection {
struct rb_node alert_node;
struct smc_link_group *lgr; /* link group of connection */
@ -50,6 +115,38 @@ struct smc_connection {
struct smc_buf_desc *rmb_desc; /* RMBE descriptor */
int rmbe_size; /* RMBE size <== sock rmem */
int rmbe_size_short;/* compressed notation */
struct smc_host_cdc_msg local_tx_ctrl; /* host byte order staging
* buffer for CDC msg send
* .prod cf. TCP snd_nxt
* .cons cf. TCP sends ack
*/
union smc_host_cursor tx_curs_prep; /* tx - prepared data
* snd_max..wmem_alloc
*/
union smc_host_cursor tx_curs_sent; /* tx - sent data
* snd_nxt ?
*/
union smc_host_cursor tx_curs_fin; /* tx - confirmed by peer
* snd-wnd-begin ?
*/
atomic_t sndbuf_space; /* remaining space in sndbuf */
u16 tx_cdc_seq; /* sequence # for CDC send */
spinlock_t send_lock; /* protect wr_sends */
struct smc_host_cdc_msg local_rx_ctrl; /* filled during event_handl.
* .prod cf. TCP rcv_nxt
* .cons cf. TCP snd_una
*/
union smc_host_cursor rx_curs_confirmed; /* confirmed to peer
* source of snd_una ?
*/
atomic_t bytes_to_rcv; /* arrived data,
* not yet received
*/
#ifndef KERNEL_HAS_ATOMIC64
spinlock_t acurs_lock; /* protect cursors */
#endif
};
struct smc_sock { /* smc sock container */

280
net/smc/smc_cdc.c Normal file
View File

@ -0,0 +1,280 @@
/*
* Shared Memory Communications over RDMA (SMC-R) and RoCE
*
* Connection Data Control (CDC)
* handles flow control
*
* Copyright IBM Corp. 2016
*
* Author(s): Ursula Braun <ubraun@linux.vnet.ibm.com>
*/
#include <linux/spinlock.h>
#include "smc.h"
#include "smc_wr.h"
#include "smc_cdc.h"
/********************************** send *************************************/
struct smc_cdc_tx_pend {
struct smc_connection *conn; /* socket connection */
union smc_host_cursor cursor; /* tx sndbuf cursor sent */
union smc_host_cursor p_cursor; /* rx RMBE cursor produced */
u16 ctrl_seq; /* conn. tx sequence # */
};
/* handler for send/transmission completion of a CDC msg */
static void smc_cdc_tx_handler(struct smc_wr_tx_pend_priv *pnd_snd,
struct smc_link *link,
enum ib_wc_status wc_status)
{
struct smc_cdc_tx_pend *cdcpend = (struct smc_cdc_tx_pend *)pnd_snd;
struct smc_sock *smc;
int diff;
if (!cdcpend->conn)
/* already dismissed */
return;
smc = container_of(cdcpend->conn, struct smc_sock, conn);
bh_lock_sock(&smc->sk);
if (!wc_status) {
diff = smc_curs_diff(cdcpend->conn->sndbuf_size,
&cdcpend->conn->tx_curs_fin,
&cdcpend->cursor);
/* sndbuf_space is decreased in smc_sendmsg */
smp_mb__before_atomic();
atomic_add(diff, &cdcpend->conn->sndbuf_space);
/* guarantee 0 <= sndbuf_space <= sndbuf_size */
smp_mb__after_atomic();
smc_curs_write(&cdcpend->conn->tx_curs_fin,
smc_curs_read(&cdcpend->cursor, cdcpend->conn),
cdcpend->conn);
}
/* subsequent patch: wake if send buffer space available */
bh_unlock_sock(&smc->sk);
}
int smc_cdc_get_free_slot(struct smc_link *link,
struct smc_wr_buf **wr_buf,
struct smc_cdc_tx_pend **pend)
{
return smc_wr_tx_get_free_slot(link, smc_cdc_tx_handler, wr_buf,
(struct smc_wr_tx_pend_priv **)pend);
}
static inline void smc_cdc_add_pending_send(struct smc_connection *conn,
struct smc_cdc_tx_pend *pend)
{
BUILD_BUG_ON_MSG(
sizeof(struct smc_cdc_msg) > SMC_WR_BUF_SIZE,
"must increase SMC_WR_BUF_SIZE to at least sizeof(struct smc_cdc_msg)");
BUILD_BUG_ON_MSG(
offsetof(struct smc_cdc_msg, reserved) > SMC_WR_TX_SIZE,
"must adapt SMC_WR_TX_SIZE to sizeof(struct smc_cdc_msg); if not all smc_wr upper layer protocols use the same message size any more, must start to set link->wr_tx_sges[i].length on each individual smc_wr_tx_send()");
BUILD_BUG_ON_MSG(
sizeof(struct smc_cdc_tx_pend) > SMC_WR_TX_PEND_PRIV_SIZE,
"must increase SMC_WR_TX_PEND_PRIV_SIZE to at least sizeof(struct smc_cdc_tx_pend)");
pend->conn = conn;
pend->cursor = conn->tx_curs_sent;
pend->p_cursor = conn->local_tx_ctrl.prod;
pend->ctrl_seq = conn->tx_cdc_seq;
}
int smc_cdc_msg_send(struct smc_connection *conn,
struct smc_wr_buf *wr_buf,
struct smc_cdc_tx_pend *pend)
{
struct smc_link *link;
int rc;
link = &conn->lgr->lnk[SMC_SINGLE_LINK];
smc_cdc_add_pending_send(conn, pend);
conn->tx_cdc_seq++;
conn->local_tx_ctrl.seqno = conn->tx_cdc_seq;
smc_host_msg_to_cdc((struct smc_cdc_msg *)wr_buf,
&conn->local_tx_ctrl, conn);
rc = smc_wr_tx_send(link, (struct smc_wr_tx_pend_priv *)pend);
if (!rc)
smc_curs_write(&conn->rx_curs_confirmed,
smc_curs_read(&conn->local_tx_ctrl.cons, conn),
conn);
return rc;
}
int smc_cdc_get_slot_and_msg_send(struct smc_connection *conn)
{
struct smc_cdc_tx_pend *pend;
struct smc_wr_buf *wr_buf;
int rc;
rc = smc_cdc_get_free_slot(&conn->lgr->lnk[SMC_SINGLE_LINK], &wr_buf,
&pend);
if (rc)
return rc;
return smc_cdc_msg_send(conn, wr_buf, pend);
}
static bool smc_cdc_tx_filter(struct smc_wr_tx_pend_priv *tx_pend,
unsigned long data)
{
struct smc_connection *conn = (struct smc_connection *)data;
struct smc_cdc_tx_pend *cdc_pend =
(struct smc_cdc_tx_pend *)tx_pend;
return cdc_pend->conn == conn;
}
static void smc_cdc_tx_dismisser(struct smc_wr_tx_pend_priv *tx_pend)
{
struct smc_cdc_tx_pend *cdc_pend =
(struct smc_cdc_tx_pend *)tx_pend;
cdc_pend->conn = NULL;
}
void smc_cdc_tx_dismiss_slots(struct smc_connection *conn)
{
struct smc_link *link = &conn->lgr->lnk[SMC_SINGLE_LINK];
smc_wr_tx_dismiss_slots(link, SMC_CDC_MSG_TYPE,
smc_cdc_tx_filter, smc_cdc_tx_dismisser,
(unsigned long)conn);
}
/********************************* receive ***********************************/
static inline bool smc_cdc_before(u16 seq1, u16 seq2)
{
return (s16)(seq1 - seq2) < 0;
}
static void smc_cdc_msg_recv_action(struct smc_sock *smc,
struct smc_link *link,
struct smc_cdc_msg *cdc)
{
union smc_host_cursor cons_old, prod_old;
struct smc_connection *conn = &smc->conn;
int diff_cons, diff_prod;
if (!cdc->prod_flags.failover_validation) {
if (smc_cdc_before(ntohs(cdc->seqno),
conn->local_rx_ctrl.seqno))
/* received seqno is old */
return;
}
smc_curs_write(&prod_old,
smc_curs_read(&conn->local_rx_ctrl.prod, conn),
conn);
smc_curs_write(&cons_old,
smc_curs_read(&conn->local_rx_ctrl.cons, conn),
conn);
smc_cdc_msg_to_host(&conn->local_rx_ctrl, cdc, conn);
diff_cons = smc_curs_diff(conn->peer_rmbe_size, &cons_old,
&conn->local_rx_ctrl.cons);
if (diff_cons) {
/* peer_rmbe_space is decreased during data transfer with RDMA
* write
*/
smp_mb__before_atomic();
atomic_add(diff_cons, &conn->peer_rmbe_space);
/* guarantee 0 <= peer_rmbe_space <= peer_rmbe_size */
smp_mb__after_atomic();
}
diff_prod = smc_curs_diff(conn->rmbe_size, &prod_old,
&conn->local_rx_ctrl.prod);
if (diff_prod) {
/* bytes_to_rcv is decreased in smc_recvmsg */
smp_mb__before_atomic();
atomic_add(diff_prod, &conn->bytes_to_rcv);
/* guarantee 0 <= bytes_to_rcv <= rmbe_size */
smp_mb__after_atomic();
}
if (conn->local_rx_ctrl.conn_state_flags.peer_conn_abort)
smc->sk.sk_err = ECONNRESET;
if (smc_cdc_rxed_any_close_or_senddone(conn))
/* subsequent patch: terminate connection */
/* piggy backed tx info */
/* subsequent patch: wake receivers if receive buffer space available */
/* subsequent patch: trigger socket release if connection closed */
/* socket connected but not accepted */
if (!smc->sk.sk_socket)
return;
/* data available */
/* subsequent patch: send delayed ack, wake receivers */
}
/* called under tasklet context */
static inline void smc_cdc_msg_recv(struct smc_cdc_msg *cdc,
struct smc_link *link, u64 wr_id)
{
struct smc_link_group *lgr = container_of(link, struct smc_link_group,
lnk[SMC_SINGLE_LINK]);
struct smc_connection *connection;
struct smc_sock *smc;
/* lookup connection */
read_lock_bh(&lgr->conns_lock);
connection = smc_lgr_find_conn(ntohl(cdc->token), lgr);
if (!connection) {
read_unlock_bh(&lgr->conns_lock);
return;
}
smc = container_of(connection, struct smc_sock, conn);
sock_hold(&smc->sk);
read_unlock_bh(&lgr->conns_lock);
bh_lock_sock(&smc->sk);
smc_cdc_msg_recv_action(smc, link, cdc);
bh_unlock_sock(&smc->sk);
sock_put(&smc->sk); /* no free sk in softirq-context */
}
/***************************** init, exit, misc ******************************/
static void smc_cdc_rx_handler(struct ib_wc *wc, void *buf)
{
struct smc_link *link = (struct smc_link *)wc->qp->qp_context;
struct smc_cdc_msg *cdc = buf;
if (wc->byte_len < offsetof(struct smc_cdc_msg, reserved))
return; /* short message */
if (cdc->len != sizeof(*cdc))
return; /* invalid message */
smc_cdc_msg_recv(cdc, link, wc->wr_id);
}
static struct smc_wr_rx_handler smc_cdc_rx_handlers[] = {
{
.handler = smc_cdc_rx_handler,
.type = SMC_CDC_MSG_TYPE
},
{
.handler = NULL,
}
};
int __init smc_cdc_init(void)
{
struct smc_wr_rx_handler *handler;
int rc = 0;
for (handler = smc_cdc_rx_handlers; handler->handler; handler++) {
INIT_HLIST_NODE(&handler->list);
rc = smc_wr_rx_register_handler(handler);
if (rc)
break;
}
return rc;
}

217
net/smc/smc_cdc.h Normal file
View File

@ -0,0 +1,217 @@
/*
* Shared Memory Communications over RDMA (SMC-R) and RoCE
*
* Connection Data Control (CDC)
*
* Copyright IBM Corp. 2016
*
* Author(s): Ursula Braun <ubraun@linux.vnet.ibm.com>
*/
#ifndef SMC_CDC_H
#define SMC_CDC_H
#include <linux/kernel.h> /* max_t */
#include <linux/atomic.h>
#include <linux/in.h>
#include <linux/compiler.h>
#include "smc.h"
#include "smc_core.h"
#include "smc_wr.h"
#define SMC_CDC_MSG_TYPE 0xFE
/* in network byte order */
union smc_cdc_cursor { /* SMC cursor */
struct {
__be16 reserved;
__be16 wrap;
__be32 count;
};
#ifdef KERNEL_HAS_ATOMIC64
atomic64_t acurs; /* for atomic processing */
#else
u64 acurs; /* for atomic processing */
#endif
} __aligned(8);
/* in network byte order */
struct smc_cdc_msg {
struct smc_wr_rx_hdr common; /* .type = 0xFE */
u8 len; /* 44 */
__be16 seqno;
__be32 token;
union smc_cdc_cursor prod;
union smc_cdc_cursor cons; /* piggy backed "ack" */
struct smc_cdc_producer_flags prod_flags;
struct smc_cdc_conn_state_flags conn_state_flags;
u8 reserved[18];
} __aligned(8);
static inline bool smc_cdc_rxed_any_close(struct smc_connection *conn)
{
return conn->local_rx_ctrl.conn_state_flags.peer_conn_abort ||
conn->local_rx_ctrl.conn_state_flags.peer_conn_closed;
}
static inline bool smc_cdc_rxed_any_close_or_senddone(
struct smc_connection *conn)
{
return smc_cdc_rxed_any_close(conn) ||
conn->local_rx_ctrl.conn_state_flags.peer_done_writing;
}
static inline void smc_curs_add(int size, union smc_host_cursor *curs,
int value)
{
curs->count += value;
if (curs->count >= size) {
curs->wrap++;
curs->count -= size;
}
}
/* SMC cursors are 8 bytes long and require atomic reading and writing */
static inline u64 smc_curs_read(union smc_host_cursor *curs,
struct smc_connection *conn)
{
#ifndef KERNEL_HAS_ATOMIC64
unsigned long flags;
u64 ret;
spin_lock_irqsave(&conn->acurs_lock, flags);
ret = curs->acurs;
spin_unlock_irqrestore(&conn->acurs_lock, flags);
return ret;
#else
return atomic64_read(&curs->acurs);
#endif
}
static inline u64 smc_curs_read_net(union smc_cdc_cursor *curs,
struct smc_connection *conn)
{
#ifndef KERNEL_HAS_ATOMIC64
unsigned long flags;
u64 ret;
spin_lock_irqsave(&conn->acurs_lock, flags);
ret = curs->acurs;
spin_unlock_irqrestore(&conn->acurs_lock, flags);
return ret;
#else
return atomic64_read(&curs->acurs);
#endif
}
static inline void smc_curs_write(union smc_host_cursor *curs, u64 val,
struct smc_connection *conn)
{
#ifndef KERNEL_HAS_ATOMIC64
unsigned long flags;
spin_lock_irqsave(&conn->acurs_lock, flags);
curs->acurs = val;
spin_unlock_irqrestore(&conn->acurs_lock, flags);
#else
atomic64_set(&curs->acurs, val);
#endif
}
static inline void smc_curs_write_net(union smc_cdc_cursor *curs, u64 val,
struct smc_connection *conn)
{
#ifndef KERNEL_HAS_ATOMIC64
unsigned long flags;
spin_lock_irqsave(&conn->acurs_lock, flags);
curs->acurs = val;
spin_unlock_irqrestore(&conn->acurs_lock, flags);
#else
atomic64_set(&curs->acurs, val);
#endif
}
/* calculate cursor difference between old and new, where old <= new */
static inline int smc_curs_diff(unsigned int size,
union smc_host_cursor *old,
union smc_host_cursor *new)
{
if (old->wrap != new->wrap)
return max_t(int, 0,
((size - old->count) + new->count));
return max_t(int, 0, (new->count - old->count));
}
static inline void smc_host_cursor_to_cdc(union smc_cdc_cursor *peer,
union smc_host_cursor *local,
struct smc_connection *conn)
{
union smc_host_cursor temp;
smc_curs_write(&temp, smc_curs_read(local, conn), conn);
peer->count = htonl(temp.count);
peer->wrap = htons(temp.wrap);
/* peer->reserved = htons(0); must be ensured by caller */
}
static inline void smc_host_msg_to_cdc(struct smc_cdc_msg *peer,
struct smc_host_cdc_msg *local,
struct smc_connection *conn)
{
peer->common.type = local->common.type;
peer->len = local->len;
peer->seqno = htons(local->seqno);
peer->token = htonl(local->token);
smc_host_cursor_to_cdc(&peer->prod, &local->prod, conn);
smc_host_cursor_to_cdc(&peer->cons, &local->cons, conn);
peer->prod_flags = local->prod_flags;
peer->conn_state_flags = local->conn_state_flags;
}
static inline void smc_cdc_cursor_to_host(union smc_host_cursor *local,
union smc_cdc_cursor *peer,
struct smc_connection *conn)
{
union smc_host_cursor temp, old;
union smc_cdc_cursor net;
smc_curs_write(&old, smc_curs_read(local, conn), conn);
smc_curs_write_net(&net, smc_curs_read_net(peer, conn), conn);
temp.count = ntohl(net.count);
temp.wrap = ntohs(net.wrap);
if ((old.wrap > temp.wrap) && temp.wrap)
return;
if ((old.wrap == temp.wrap) &&
(old.count > temp.count))
return;
smc_curs_write(local, smc_curs_read(&temp, conn), conn);
}
static inline void smc_cdc_msg_to_host(struct smc_host_cdc_msg *local,
struct smc_cdc_msg *peer,
struct smc_connection *conn)
{
local->common.type = peer->common.type;
local->len = peer->len;
local->seqno = ntohs(peer->seqno);
local->token = ntohl(peer->token);
smc_cdc_cursor_to_host(&local->prod, &peer->prod, conn);
smc_cdc_cursor_to_host(&local->cons, &peer->cons, conn);
local->prod_flags = peer->prod_flags;
local->conn_state_flags = peer->conn_state_flags;
}
struct smc_cdc_tx_pend;
int smc_cdc_get_free_slot(struct smc_link *link, struct smc_wr_buf **wr_buf,
struct smc_cdc_tx_pend **pend);
void smc_cdc_tx_dismiss_slots(struct smc_connection *conn);
int smc_cdc_msg_send(struct smc_connection *conn, struct smc_wr_buf *wr_buf,
struct smc_cdc_tx_pend *pend);
int smc_cdc_get_slot_and_msg_send(struct smc_connection *conn);
int smc_cdc_init(void) __init;
#endif /* SMC_CDC_H */

9
net/smc/smc_core.c
View File

@ -22,6 +22,7 @@
#include "smc_ib.h"
#include "smc_wr.h"
#include "smc_llc.h"
#include "smc_cdc.h"
#define SMC_LGR_NUM_INCR 256
#define SMC_LGR_FREE_DELAY (600 * HZ)
@ -228,6 +229,7 @@ void smc_conn_free(struct smc_connection *conn)
if (!lgr)
return;
smc_cdc_tx_dismiss_slots(conn);
smc_lgr_unregister_conn(conn);
smc_rmb_unuse(conn);
smc_sndbuf_unuse(conn);
@ -435,6 +437,11 @@ create:
smc_lgr_register_conn(conn); /* add smc conn to lgr */
rc = smc_link_determine_gid(conn->lgr);
}
conn->local_tx_ctrl.common.type = SMC_CDC_MSG_TYPE;
conn->local_tx_ctrl.len = sizeof(struct smc_cdc_msg);
#ifndef KERNEL_HAS_ATOMIC64
spin_lock_init(&conn->acurs_lock);
#endif
out:
return rc ? rc : local_contact;
@ -535,6 +542,7 @@ int smc_sndbuf_create(struct smc_sock *smc)
conn->sndbuf_desc = sndbuf_desc;
conn->sndbuf_size = tmp_bufsize;
smc->sk.sk_sndbuf = tmp_bufsize * 2;
atomic_set(&conn->sndbuf_space, tmp_bufsize);
return 0;
} else {
return -ENOMEM;
@ -611,6 +619,7 @@ int smc_rmb_create(struct smc_sock *smc)
conn->rmbe_size = tmp_bufsize;
conn->rmbe_size_short = tmp_bufsize_short;
smc->sk.sk_rcvbuf = tmp_bufsize * 2;
atomic_set(&conn->bytes_to_rcv, 0);
return 0;
} else {
return -ENOMEM;

19
net/smc/smc_wr.c
View File

@ -237,6 +237,25 @@ int smc_wr_tx_send(struct smc_link *link, struct smc_wr_tx_pend_priv *priv)
return rc;
}
void smc_wr_tx_dismiss_slots(struct smc_link *link, u8 wr_rx_hdr_type,
smc_wr_tx_filter filter,
smc_wr_tx_dismisser dismisser,
unsigned long data)
{
struct smc_wr_tx_pend_priv *tx_pend;
struct smc_wr_rx_hdr *wr_rx;
int i;
for_each_set_bit(i, link->wr_tx_mask, link->wr_tx_cnt) {
wr_rx = (struct smc_wr_rx_hdr *)&link->wr_rx_bufs[i];
if (wr_rx->type != wr_rx_hdr_type)
continue;
tx_pend = &link->wr_tx_pends[i].priv;
if (filter(tx_pend, data))
dismisser(tx_pend);
}
}
/****************************** receive queue ********************************/
int smc_wr_rx_register_handler(struct smc_wr_rx_handler *handler)

9
net/smc/smc_wr.h
View File

@ -36,6 +36,11 @@ typedef void (*smc_wr_tx_handler)(struct smc_wr_tx_pend_priv *,
struct smc_link *,
enum ib_wc_status);
typedef bool (*smc_wr_tx_filter)(struct smc_wr_tx_pend_priv *,
unsigned long);
typedef void (*smc_wr_tx_dismisser)(struct smc_wr_tx_pend_priv *);
struct smc_wr_rx_handler {
struct hlist_node list; /* hash table collision resolution */
void (*handler)(struct ib_wc *, void *);
@ -87,6 +92,10 @@ int smc_wr_tx_put_slot(struct smc_link *link,
int smc_wr_tx_send(struct smc_link *link,
struct smc_wr_tx_pend_priv *wr_pend_priv);
void smc_wr_tx_cq_handler(struct ib_cq *ib_cq, void *cq_context);
void smc_wr_tx_dismiss_slots(struct smc_link *lnk, u8 wr_rx_hdr_type,
smc_wr_tx_filter filter,
smc_wr_tx_dismisser dismisser,
unsigned long data);
int smc_wr_rx_register_handler(struct smc_wr_rx_handler *handler);
int smc_wr_rx_post_init(struct smc_link *link);