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-rw-r--r--net/rds/af_rds.c31
-rw-r--r--net/rds/bind.c4
-rw-r--r--net/rds/connection.c10
-rw-r--r--net/rds/ib.c11
-rw-r--r--net/rds/ib.h22
-rw-r--r--net/rds/ib_cm.c89
-rw-r--r--net/rds/ib_frmr.c16
-rw-r--r--net/rds/ib_recv.c14
-rw-r--r--net/rds/ib_send.c30
-rw-r--r--net/rds/ib_stats.c2
-rw-r--r--net/rds/rdma.c22
-rw-r--r--net/rds/rdma_transport.c11
-rw-r--r--net/rds/rds.h17
-rw-r--r--net/rds/recv.c36
-rw-r--r--net/rds/send.c50
-rw-r--r--net/rds/tcp_listen.c1
-rw-r--r--net/rds/tcp_recv.c5
17 files changed, 305 insertions, 66 deletions
diff --git a/net/rds/af_rds.c b/net/rds/af_rds.c
index 2ac1e6194be3..b405f77d664c 100644
--- a/net/rds/af_rds.c
+++ b/net/rds/af_rds.c
@@ -298,6 +298,33 @@ static int rds_enable_recvtstamp(struct sock *sk, char __user *optval,
return 0;
}
+static int rds_recv_track_latency(struct rds_sock *rs, char __user *optval,
+ int optlen)
+{
+ struct rds_rx_trace_so trace;
+ int i;
+
+ if (optlen != sizeof(struct rds_rx_trace_so))
+ return -EFAULT;
+
+ if (copy_from_user(&trace, optval, sizeof(trace)))
+ return -EFAULT;
+
+ if (trace.rx_traces > RDS_MSG_RX_DGRAM_TRACE_MAX)
+ return -EFAULT;
+
+ rs->rs_rx_traces = trace.rx_traces;
+ for (i = 0; i < rs->rs_rx_traces; i++) {
+ if (trace.rx_trace_pos[i] > RDS_MSG_RX_DGRAM_TRACE_MAX) {
+ rs->rs_rx_traces = 0;
+ return -EFAULT;
+ }
+ rs->rs_rx_trace[i] = trace.rx_trace_pos[i];
+ }
+
+ return 0;
+}
+
static int rds_setsockopt(struct socket *sock, int level, int optname,
char __user *optval, unsigned int optlen)
{
@@ -338,6 +365,9 @@ static int rds_setsockopt(struct socket *sock, int level, int optname,
ret = rds_enable_recvtstamp(sock->sk, optval, optlen);
release_sock(sock->sk);
break;
+ case SO_RDS_MSG_RXPATH_LATENCY:
+ ret = rds_recv_track_latency(rs, optval, optlen);
+ break;
default:
ret = -ENOPROTOOPT;
}
@@ -484,6 +514,7 @@ static int __rds_create(struct socket *sock, struct sock *sk, int protocol)
INIT_LIST_HEAD(&rs->rs_cong_list);
spin_lock_init(&rs->rs_rdma_lock);
rs->rs_rdma_keys = RB_ROOT;
+ rs->rs_rx_traces = 0;
spin_lock_bh(&rds_sock_lock);
list_add_tail(&rs->rs_item, &rds_sock_list);
diff --git a/net/rds/bind.c b/net/rds/bind.c
index 095f6ce583fe..3a915bedb76c 100644
--- a/net/rds/bind.c
+++ b/net/rds/bind.c
@@ -176,8 +176,8 @@ int rds_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
if (!trans) {
ret = -EADDRNOTAVAIL;
rds_remove_bound(rs);
- printk_ratelimited(KERN_INFO "RDS: rds_bind() could not find a transport, "
- "load rds_tcp or rds_rdma?\n");
+ pr_info_ratelimited("RDS: %s could not find a transport for %pI4, load rds_tcp or rds_rdma?\n",
+ __func__, &sin->sin_addr.s_addr);
goto out;
}
diff --git a/net/rds/connection.c b/net/rds/connection.c
index fe9d31c0b22d..0e04dcceb1d4 100644
--- a/net/rds/connection.c
+++ b/net/rds/connection.c
@@ -545,11 +545,11 @@ void rds_for_each_conn_info(struct socket *sock, unsigned int len,
}
EXPORT_SYMBOL_GPL(rds_for_each_conn_info);
-void rds_walk_conn_path_info(struct socket *sock, unsigned int len,
- struct rds_info_iterator *iter,
- struct rds_info_lengths *lens,
- int (*visitor)(struct rds_conn_path *, void *),
- size_t item_len)
+static void rds_walk_conn_path_info(struct socket *sock, unsigned int len,
+ struct rds_info_iterator *iter,
+ struct rds_info_lengths *lens,
+ int (*visitor)(struct rds_conn_path *, void *),
+ size_t item_len)
{
u64 buffer[(item_len + 7) / 8];
struct hlist_head *head;
diff --git a/net/rds/ib.c b/net/rds/ib.c
index 5680d90b0b77..8d70884d7bb6 100644
--- a/net/rds/ib.c
+++ b/net/rds/ib.c
@@ -111,6 +111,9 @@ static void rds_ib_dev_free(struct work_struct *work)
kfree(i_ipaddr);
}
+ if (rds_ibdev->vector_load)
+ kfree(rds_ibdev->vector_load);
+
kfree(rds_ibdev);
}
@@ -159,6 +162,14 @@ static void rds_ib_add_one(struct ib_device *device)
rds_ibdev->max_initiator_depth = device->attrs.max_qp_init_rd_atom;
rds_ibdev->max_responder_resources = device->attrs.max_qp_rd_atom;
+ rds_ibdev->vector_load = kzalloc(sizeof(int) * device->num_comp_vectors,
+ GFP_KERNEL);
+ if (!rds_ibdev->vector_load) {
+ pr_err("RDS/IB: %s failed to allocate vector memory\n",
+ __func__);
+ goto put_dev;
+ }
+
rds_ibdev->dev = device;
rds_ibdev->pd = ib_alloc_pd(device, 0);
if (IS_ERR(rds_ibdev->pd)) {
diff --git a/net/rds/ib.h b/net/rds/ib.h
index 45ac8e8e58f4..540458928f3c 100644
--- a/net/rds/ib.h
+++ b/net/rds/ib.h
@@ -14,9 +14,10 @@
#define RDS_IB_DEFAULT_RECV_WR 1024
#define RDS_IB_DEFAULT_SEND_WR 256
-#define RDS_IB_DEFAULT_FR_WR 512
+#define RDS_IB_DEFAULT_FR_WR 256
+#define RDS_IB_DEFAULT_FR_INV_WR 256
-#define RDS_IB_DEFAULT_RETRY_COUNT 2
+#define RDS_IB_DEFAULT_RETRY_COUNT 1
#define RDS_IB_SUPPORTED_PROTOCOLS 0x00000003 /* minor versions supported */
@@ -125,6 +126,7 @@ struct rds_ib_connection {
/* To control the number of wrs from fastreg */
atomic_t i_fastreg_wrs;
+ atomic_t i_fastunreg_wrs;
/* interrupt handling */
struct tasklet_struct i_send_tasklet;
@@ -149,6 +151,7 @@ struct rds_ib_connection {
u64 i_ack_recv; /* last ACK received */
struct rds_ib_refill_cache i_cache_incs;
struct rds_ib_refill_cache i_cache_frags;
+ atomic_t i_cache_allocs;
/* sending acks */
unsigned long i_ack_flags;
@@ -179,6 +182,14 @@ struct rds_ib_connection {
/* Batched completions */
unsigned int i_unsignaled_wrs;
+
+ /* Endpoint role in connection */
+ bool i_active_side;
+ atomic_t i_cq_quiesce;
+
+ /* Send/Recv vectors */
+ int i_scq_vector;
+ int i_rcq_vector;
};
/* This assumes that atomic_t is at least 32 bits */
@@ -221,6 +232,7 @@ struct rds_ib_device {
spinlock_t spinlock; /* protect the above */
atomic_t refcount;
struct work_struct free_work;
+ int *vector_load;
};
#define ibdev_to_node(ibdev) dev_to_node(ibdev->dma_device)
@@ -249,6 +261,8 @@ struct rds_ib_statistics {
uint64_t s_ib_rx_refill_from_cq;
uint64_t s_ib_rx_refill_from_thread;
uint64_t s_ib_rx_alloc_limit;
+ uint64_t s_ib_rx_total_frags;
+ uint64_t s_ib_rx_total_incs;
uint64_t s_ib_rx_credit_updates;
uint64_t s_ib_ack_sent;
uint64_t s_ib_ack_send_failure;
@@ -271,6 +285,8 @@ struct rds_ib_statistics {
uint64_t s_ib_rdma_mr_1m_reused;
uint64_t s_ib_atomic_cswp;
uint64_t s_ib_atomic_fadd;
+ uint64_t s_ib_recv_added_to_cache;
+ uint64_t s_ib_recv_removed_from_cache;
};
extern struct workqueue_struct *rds_ib_wq;
@@ -401,6 +417,8 @@ int rds_ib_xmit_atomic(struct rds_connection *conn, struct rm_atomic_op *op);
/* ib_stats.c */
DECLARE_PER_CPU(struct rds_ib_statistics, rds_ib_stats);
#define rds_ib_stats_inc(member) rds_stats_inc_which(rds_ib_stats, member)
+#define rds_ib_stats_add(member, count) \
+ rds_stats_add_which(rds_ib_stats, member, count)
unsigned int rds_ib_stats_info_copy(struct rds_info_iterator *iter,
unsigned int avail);
diff --git a/net/rds/ib_cm.c b/net/rds/ib_cm.c
index 5b2ab95afa07..ce3775abc6e7 100644
--- a/net/rds/ib_cm.c
+++ b/net/rds/ib_cm.c
@@ -113,24 +113,26 @@ void rds_ib_cm_connect_complete(struct rds_connection *conn, struct rdma_cm_even
}
if (conn->c_version < RDS_PROTOCOL(3, 1)) {
- printk(KERN_NOTICE "RDS/IB: Connection to %pI4 version %u.%u failed,"
- " no longer supported\n",
- &conn->c_faddr,
- RDS_PROTOCOL_MAJOR(conn->c_version),
- RDS_PROTOCOL_MINOR(conn->c_version));
+ pr_notice("RDS/IB: Connection <%pI4,%pI4> version %u.%u no longer supported\n",
+ &conn->c_laddr, &conn->c_faddr,
+ RDS_PROTOCOL_MAJOR(conn->c_version),
+ RDS_PROTOCOL_MINOR(conn->c_version));
rds_conn_destroy(conn);
return;
} else {
- printk(KERN_NOTICE "RDS/IB: connected to %pI4 version %u.%u%s\n",
- &conn->c_faddr,
- RDS_PROTOCOL_MAJOR(conn->c_version),
- RDS_PROTOCOL_MINOR(conn->c_version),
- ic->i_flowctl ? ", flow control" : "");
+ pr_notice("RDS/IB: %s conn connected <%pI4,%pI4> version %u.%u%s\n",
+ ic->i_active_side ? "Active" : "Passive",
+ &conn->c_laddr, &conn->c_faddr,
+ RDS_PROTOCOL_MAJOR(conn->c_version),
+ RDS_PROTOCOL_MINOR(conn->c_version),
+ ic->i_flowctl ? ", flow control" : "");
}
- /*
- * Init rings and fill recv. this needs to wait until protocol negotiation
- * is complete, since ring layout is different from 3.0 to 3.1.
+ atomic_set(&ic->i_cq_quiesce, 0);
+
+ /* Init rings and fill recv. this needs to wait until protocol
+ * negotiation is complete, since ring layout is different
+ * from 3.1 to 4.1.
*/
rds_ib_send_init_ring(ic);
rds_ib_recv_init_ring(ic);
@@ -267,6 +269,10 @@ static void rds_ib_tasklet_fn_send(unsigned long data)
rds_ib_stats_inc(s_ib_tasklet_call);
+ /* if cq has been already reaped, ignore incoming cq event */
+ if (atomic_read(&ic->i_cq_quiesce))
+ return;
+
poll_scq(ic, ic->i_send_cq, ic->i_send_wc);
ib_req_notify_cq(ic->i_send_cq, IB_CQ_NEXT_COMP);
poll_scq(ic, ic->i_send_cq, ic->i_send_wc);
@@ -308,6 +314,10 @@ static void rds_ib_tasklet_fn_recv(unsigned long data)
rds_ib_stats_inc(s_ib_tasklet_call);
+ /* if cq has been already reaped, ignore incoming cq event */
+ if (atomic_read(&ic->i_cq_quiesce))
+ return;
+
memset(&state, 0, sizeof(state));
poll_rcq(ic, ic->i_recv_cq, ic->i_recv_wc, &state);
ib_req_notify_cq(ic->i_recv_cq, IB_CQ_SOLICITED);
@@ -358,6 +368,28 @@ static void rds_ib_cq_comp_handler_send(struct ib_cq *cq, void *context)
tasklet_schedule(&ic->i_send_tasklet);
}
+static inline int ibdev_get_unused_vector(struct rds_ib_device *rds_ibdev)
+{
+ int min = rds_ibdev->vector_load[rds_ibdev->dev->num_comp_vectors - 1];
+ int index = rds_ibdev->dev->num_comp_vectors - 1;
+ int i;
+
+ for (i = rds_ibdev->dev->num_comp_vectors - 1; i >= 0; i--) {
+ if (rds_ibdev->vector_load[i] < min) {
+ index = i;
+ min = rds_ibdev->vector_load[i];
+ }
+ }
+
+ rds_ibdev->vector_load[index]++;
+ return index;
+}
+
+static inline void ibdev_put_vector(struct rds_ib_device *rds_ibdev, int index)
+{
+ rds_ibdev->vector_load[index]--;
+}
+
/*
* This needs to be very careful to not leave IS_ERR pointers around for
* cleanup to trip over.
@@ -383,7 +415,10 @@ static int rds_ib_setup_qp(struct rds_connection *conn)
* completion queue and send queue. This extra space is used for FRMR
* registration and invalidation work requests
*/
- fr_queue_space = (rds_ibdev->use_fastreg ? RDS_IB_DEFAULT_FR_WR : 0);
+ fr_queue_space = rds_ibdev->use_fastreg ?
+ (RDS_IB_DEFAULT_FR_WR + 1) +
+ (RDS_IB_DEFAULT_FR_INV_WR + 1)
+ : 0;
/* add the conn now so that connection establishment has the dev */
rds_ib_add_conn(rds_ibdev, conn);
@@ -396,25 +431,30 @@ static int rds_ib_setup_qp(struct rds_connection *conn)
/* Protection domain and memory range */
ic->i_pd = rds_ibdev->pd;
+ ic->i_scq_vector = ibdev_get_unused_vector(rds_ibdev);
cq_attr.cqe = ic->i_send_ring.w_nr + fr_queue_space + 1;
-
+ cq_attr.comp_vector = ic->i_scq_vector;
ic->i_send_cq = ib_create_cq(dev, rds_ib_cq_comp_handler_send,
rds_ib_cq_event_handler, conn,
&cq_attr);
if (IS_ERR(ic->i_send_cq)) {
ret = PTR_ERR(ic->i_send_cq);
ic->i_send_cq = NULL;
+ ibdev_put_vector(rds_ibdev, ic->i_scq_vector);
rdsdebug("ib_create_cq send failed: %d\n", ret);
goto out;
}
+ ic->i_rcq_vector = ibdev_get_unused_vector(rds_ibdev);
cq_attr.cqe = ic->i_recv_ring.w_nr;
+ cq_attr.comp_vector = ic->i_rcq_vector;
ic->i_recv_cq = ib_create_cq(dev, rds_ib_cq_comp_handler_recv,
rds_ib_cq_event_handler, conn,
&cq_attr);
if (IS_ERR(ic->i_recv_cq)) {
ret = PTR_ERR(ic->i_recv_cq);
ic->i_recv_cq = NULL;
+ ibdev_put_vector(rds_ibdev, ic->i_rcq_vector);
rdsdebug("ib_create_cq recv failed: %d\n", ret);
goto out;
}
@@ -445,6 +485,7 @@ static int rds_ib_setup_qp(struct rds_connection *conn)
attr.send_cq = ic->i_send_cq;
attr.recv_cq = ic->i_recv_cq;
atomic_set(&ic->i_fastreg_wrs, RDS_IB_DEFAULT_FR_WR);
+ atomic_set(&ic->i_fastunreg_wrs, RDS_IB_DEFAULT_FR_INV_WR);
/*
* XXX this can fail if max_*_wr is too large? Are we supposed
@@ -682,6 +723,7 @@ out:
if (ic->i_cm_id == cm_id)
ret = 0;
}
+ ic->i_active_side = true;
return ret;
}
@@ -767,17 +809,27 @@ void rds_ib_conn_path_shutdown(struct rds_conn_path *cp)
wait_event(rds_ib_ring_empty_wait,
rds_ib_ring_empty(&ic->i_recv_ring) &&
(atomic_read(&ic->i_signaled_sends) == 0) &&
- (atomic_read(&ic->i_fastreg_wrs) == RDS_IB_DEFAULT_FR_WR));
+ (atomic_read(&ic->i_fastreg_wrs) == RDS_IB_DEFAULT_FR_WR) &&
+ (atomic_read(&ic->i_fastunreg_wrs) == RDS_IB_DEFAULT_FR_INV_WR));
tasklet_kill(&ic->i_send_tasklet);
tasklet_kill(&ic->i_recv_tasklet);
+ atomic_set(&ic->i_cq_quiesce, 1);
+
/* first destroy the ib state that generates callbacks */
if (ic->i_cm_id->qp)
rdma_destroy_qp(ic->i_cm_id);
- if (ic->i_send_cq)
+ if (ic->i_send_cq) {
+ if (ic->rds_ibdev)
+ ibdev_put_vector(ic->rds_ibdev, ic->i_scq_vector);
ib_destroy_cq(ic->i_send_cq);
- if (ic->i_recv_cq)
+ }
+
+ if (ic->i_recv_cq) {
+ if (ic->rds_ibdev)
+ ibdev_put_vector(ic->rds_ibdev, ic->i_rcq_vector);
ib_destroy_cq(ic->i_recv_cq);
+ }
/* then free the resources that ib callbacks use */
if (ic->i_send_hdrs)
@@ -855,6 +907,7 @@ void rds_ib_conn_path_shutdown(struct rds_conn_path *cp)
ic->i_sends = NULL;
vfree(ic->i_recvs);
ic->i_recvs = NULL;
+ ic->i_active_side = false;
}
int rds_ib_conn_alloc(struct rds_connection *conn, gfp_t gfp)
diff --git a/net/rds/ib_frmr.c b/net/rds/ib_frmr.c
index d921adc62765..48332a6ed738 100644
--- a/net/rds/ib_frmr.c
+++ b/net/rds/ib_frmr.c
@@ -104,14 +104,15 @@ static int rds_ib_post_reg_frmr(struct rds_ib_mr *ibmr)
struct rds_ib_frmr *frmr = &ibmr->u.frmr;
struct ib_send_wr *failed_wr;
struct ib_reg_wr reg_wr;
- int ret;
+ int ret, off = 0;
while (atomic_dec_return(&ibmr->ic->i_fastreg_wrs) <= 0) {
atomic_inc(&ibmr->ic->i_fastreg_wrs);
cpu_relax();
}
- ret = ib_map_mr_sg_zbva(frmr->mr, ibmr->sg, ibmr->sg_len, 0, PAGE_SIZE);
+ ret = ib_map_mr_sg_zbva(frmr->mr, ibmr->sg, ibmr->sg_len,
+ &off, PAGE_SIZE);
if (unlikely(ret != ibmr->sg_len))
return ret < 0 ? ret : -EINVAL;
@@ -240,8 +241,8 @@ static int rds_ib_post_inv(struct rds_ib_mr *ibmr)
if (frmr->fr_state != FRMR_IS_INUSE)
goto out;
- while (atomic_dec_return(&ibmr->ic->i_fastreg_wrs) <= 0) {
- atomic_inc(&ibmr->ic->i_fastreg_wrs);
+ while (atomic_dec_return(&ibmr->ic->i_fastunreg_wrs) <= 0) {
+ atomic_inc(&ibmr->ic->i_fastunreg_wrs);
cpu_relax();
}
@@ -260,7 +261,7 @@ static int rds_ib_post_inv(struct rds_ib_mr *ibmr)
if (unlikely(ret)) {
frmr->fr_state = FRMR_IS_STALE;
frmr->fr_inv = false;
- atomic_inc(&ibmr->ic->i_fastreg_wrs);
+ atomic_inc(&ibmr->ic->i_fastunreg_wrs);
pr_err("RDS/IB: %s returned error(%d)\n", __func__, ret);
goto out;
}
@@ -288,9 +289,10 @@ void rds_ib_mr_cqe_handler(struct rds_ib_connection *ic, struct ib_wc *wc)
if (frmr->fr_inv) {
frmr->fr_state = FRMR_IS_FREE;
frmr->fr_inv = false;
+ atomic_inc(&ic->i_fastreg_wrs);
+ } else {
+ atomic_inc(&ic->i_fastunreg_wrs);
}
-
- atomic_inc(&ic->i_fastreg_wrs);
}
void rds_ib_unreg_frmr(struct list_head *list, unsigned int *nfreed,
diff --git a/net/rds/ib_recv.c b/net/rds/ib_recv.c
index 606a11f681d2..e10624aa6959 100644
--- a/net/rds/ib_recv.c
+++ b/net/rds/ib_recv.c
@@ -194,6 +194,8 @@ static void rds_ib_frag_free(struct rds_ib_connection *ic,
rdsdebug("frag %p page %p\n", frag, sg_page(&frag->f_sg));
rds_ib_recv_cache_put(&frag->f_cache_entry, &ic->i_cache_frags);
+ atomic_add(RDS_FRAG_SIZE / SZ_1K, &ic->i_cache_allocs);
+ rds_ib_stats_add(s_ib_recv_added_to_cache, RDS_FRAG_SIZE);
}
/* Recycle inc after freeing attached frags */
@@ -261,6 +263,7 @@ static struct rds_ib_incoming *rds_ib_refill_one_inc(struct rds_ib_connection *i
atomic_dec(&rds_ib_allocation);
return NULL;
}
+ rds_ib_stats_inc(s_ib_rx_total_incs);
}
INIT_LIST_HEAD(&ibinc->ii_frags);
rds_inc_init(&ibinc->ii_inc, ic->conn, ic->conn->c_faddr);
@@ -278,6 +281,8 @@ static struct rds_page_frag *rds_ib_refill_one_frag(struct rds_ib_connection *ic
cache_item = rds_ib_recv_cache_get(&ic->i_cache_frags);
if (cache_item) {
frag = container_of(cache_item, struct rds_page_frag, f_cache_entry);
+ atomic_sub(RDS_FRAG_SIZE / SZ_1K, &ic->i_cache_allocs);
+ rds_ib_stats_add(s_ib_recv_added_to_cache, RDS_FRAG_SIZE);
} else {
frag = kmem_cache_alloc(rds_ib_frag_slab, slab_mask);
if (!frag)
@@ -290,6 +295,7 @@ static struct rds_page_frag *rds_ib_refill_one_frag(struct rds_ib_connection *ic
kmem_cache_free(rds_ib_frag_slab, frag);
return NULL;
}
+ rds_ib_stats_inc(s_ib_rx_total_frags);
}
INIT_LIST_HEAD(&frag->f_item);
@@ -905,8 +911,12 @@ static void rds_ib_process_recv(struct rds_connection *conn,
ic->i_ibinc = ibinc;
hdr = &ibinc->ii_inc.i_hdr;
+ ibinc->ii_inc.i_rx_lat_trace[RDS_MSG_RX_HDR] =
+ local_clock();
memcpy(hdr, ihdr, sizeof(*hdr));
ic->i_recv_data_rem = be32_to_cpu(hdr->h_len);
+ ibinc->ii_inc.i_rx_lat_trace[RDS_MSG_RX_START] =
+ local_clock();
rdsdebug("ic %p ibinc %p rem %u flag 0x%x\n", ic, ibinc,
ic->i_recv_data_rem, hdr->h_flags);
@@ -980,8 +990,8 @@ void rds_ib_recv_cqe_handler(struct rds_ib_connection *ic,
} else {
/* We expect errors as the qp is drained during shutdown */
if (rds_conn_up(conn) || rds_conn_connecting(conn))
- rds_ib_conn_error(conn, "recv completion on %pI4 had status %u (%s), disconnecting and reconnecting\n",
- &conn->c_faddr,
+ rds_ib_conn_error(conn, "recv completion on <%pI4,%pI4> had status %u (%s), disconnecting and reconnecting\n",
+ &conn->c_laddr, &conn->c_faddr,
wc->status,
ib_wc_status_msg(wc->status));
}
diff --git a/net/rds/ib_send.c b/net/rds/ib_send.c
index 84d90c97332f..6ab39dbcca01 100644
--- a/net/rds/ib_send.c
+++ b/net/rds/ib_send.c
@@ -69,16 +69,6 @@ static void rds_ib_send_complete(struct rds_message *rm,
complete(rm, notify_status);
}
-static void rds_ib_send_unmap_data(struct rds_ib_connection *ic,
- struct rm_data_op *op,
- int wc_status)
-{
- if (op->op_nents)
- ib_dma_unmap_sg(ic->i_cm_id->device,
- op->op_sg, op->op_nents,
- DMA_TO_DEVICE);
-}
-
static void rds_ib_send_unmap_rdma(struct rds_ib_connection *ic,
struct rm_rdma_op *op,
int wc_status)
@@ -139,6 +129,21 @@ static void rds_ib_send_unmap_atomic(struct rds_ib_connection *ic,
rds_ib_stats_inc(s_ib_atomic_fadd);
}
+static void rds_ib_send_unmap_data(struct rds_ib_connection *ic,
+ struct rm_data_op *op,
+ int wc_status)
+{
+ struct rds_message *rm = container_of(op, struct rds_message, data);
+
+ if (op->op_nents)
+ ib_dma_unmap_sg(ic->i_cm_id->device,
+ op->op_sg, op->op_nents,
+ DMA_TO_DEVICE);
+
+ if (rm->rdma.op_active && rm->data.op_notify)
+ rds_ib_send_unmap_rdma(ic, &rm->rdma, wc_status);
+}
+
/*
* Unmap the resources associated with a struct send_work.
*
@@ -300,8 +305,8 @@ void rds_ib_send_cqe_handler(struct rds_ib_connection *ic, struct ib_wc *wc)
/* We expect errors as the qp is drained during shutdown */
if (wc->status != IB_WC_SUCCESS && rds_conn_up(conn)) {
- rds_ib_conn_error(conn, "send completion on %pI4 had status %u (%s), disconnecting and reconnecting\n",
- &conn->c_faddr, wc->status,
+ rds_ib_conn_error(conn, "send completion on <%pI4,%pI4> had status %u (%s), disconnecting and reconnecting\n",
+ &conn->c_laddr, &conn->c_faddr, wc->status,
ib_wc_status_msg(wc->status));
}
}
@@ -765,7 +770,6 @@ int rds_ib_xmit_atomic(struct rds_connection *conn, struct rm_atomic_op *op)
work_alloc = rds_ib_ring_alloc(&ic->i_send_ring, 1, &pos);
if (work_alloc != 1) {
- rds_ib_ring_unalloc(&ic->i_send_ring, work_alloc);
rds_ib_stats_inc(s_ib_tx_ring_full);
ret = -ENOMEM;
goto out;
diff --git a/net/rds/ib_stats.c b/net/rds/ib_stats.c
index 7e78dca1f252..9252ad126335 100644
--- a/net/rds/ib_stats.c
+++ b/net/rds/ib_stats.c
@@ -55,6 +55,8 @@ static const char *const rds_ib_stat_names[] = {
"ib_rx_refill_from_cq",
"ib_rx_refill_from_thread",
"ib_rx_alloc_limit",
+ "ib_rx_total_frags",
+ "ib_rx_total_incs",
"ib_rx_credit_updates",
"ib_ack_sent",
"ib_ack_send_failure",
diff --git a/net/rds/rdma.c b/net/rds/rdma.c
index ea961144084f..f06fac4886b0 100644
--- a/net/rds/rdma.c
+++ b/net/rds/rdma.c
@@ -40,7 +40,6 @@
/*
* XXX
* - build with sparse
- * - should we limit the size of a mr region? let transport return failure?
* - should we detect duplicate keys on a socket? hmm.
* - an rdma is an mlock, apply rlimit?
*/
@@ -200,6 +199,14 @@ static int __rds_rdma_map(struct rds_sock *rs, struct rds_get_mr_args *args,
goto out;
}
+ /* Restrict the size of mr irrespective of underlying transport
+ * To account for unaligned mr regions, subtract one from nr_pages
+ */
+ if ((nr_pages - 1) > (RDS_MAX_MSG_SIZE >> PAGE_SHIFT)) {
+ ret = -EMSGSIZE;
+ goto out;
+ }
+
rdsdebug("RDS: get_mr addr %llx len %llu nr_pages %u\n",
args->vec.addr, args->vec.bytes, nr_pages);
@@ -415,7 +422,8 @@ void rds_rdma_unuse(struct rds_sock *rs, u32 r_key, int force)
spin_lock_irqsave(&rs->rs_rdma_lock, flags);
mr = rds_mr_tree_walk(&rs->rs_rdma_keys, r_key, NULL);
if (!mr) {
- printk(KERN_ERR "rds: trying to unuse MR with unknown r_key %u!\n", r_key);
+ pr_debug("rds: trying to unuse MR with unknown r_key %u!\n",
+ r_key);
spin_unlock_irqrestore(&rs->rs_rdma_lock, flags);
return;
}
@@ -626,6 +634,16 @@ int rds_cmsg_rdma_args(struct rds_sock *rs, struct rds_message *rm,
}
op->op_notifier->n_user_token = args->user_token;
op->op_notifier->n_status = RDS_RDMA_SUCCESS;
+
+ /* Enable rmda notification on data operation for composite
+ * rds messages and make sure notification is enabled only
+ * for the data operation which follows it so that application
+ * gets notified only after full message gets delivered.
+ */
+ if (rm->data.op_sg) {
+ rm->rdma.op_notify = 0;
+ rm->data.op_notify = !!(args->flags & RDS_RDMA_NOTIFY_ME);
+ }
}
/* The cookie contains the R_Key of the remote memory region, and
diff --git a/net/rds/rdma_transport.c b/net/rds/rdma_transport.c
index d5f311767157..fc59821f0a27 100644
--- a/net/rds/rdma_transport.c
+++ b/net/rds/rdma_transport.c
@@ -206,18 +206,13 @@ static int rds_rdma_init(void)
{
int ret;
- ret = rds_rdma_listen_init();
+ ret = rds_ib_init();
if (ret)
goto out;
- ret = rds_ib_init();
+ ret = rds_rdma_listen_init();
if (ret)
- goto err_ib_init;
-
- goto out;
-
-err_ib_init:
- rds_rdma_listen_stop();
+ rds_ib_exit();
out:
return ret;
}
diff --git a/net/rds/rds.h b/net/rds/rds.h
index ebbf909b87ec..07fff73dd4f3 100644
--- a/net/rds/rds.h
+++ b/net/rds/rds.h
@@ -50,6 +50,9 @@ void rdsdebug(char *fmt, ...)
#define RDS_FRAG_SHIFT 12
#define RDS_FRAG_SIZE ((unsigned int)(1 << RDS_FRAG_SHIFT))
+/* Used to limit both RDMA and non-RDMA RDS message to 1MB */
+#define RDS_MAX_MSG_SIZE ((unsigned int)(1 << 20))
+
#define RDS_CONG_MAP_BYTES (65536 / 8)
#define RDS_CONG_MAP_PAGES (PAGE_ALIGN(RDS_CONG_MAP_BYTES) / PAGE_SIZE)
#define RDS_CONG_MAP_PAGE_BITS (PAGE_SIZE * 8)
@@ -250,6 +253,11 @@ struct rds_ext_header_rdma_dest {
#define RDS_EXTHDR_GEN_NUM 6
#define __RDS_EXTHDR_MAX 16 /* for now */
+#define RDS_RX_MAX_TRACES (RDS_MSG_RX_DGRAM_TRACE_MAX + 1)
+#define RDS_MSG_RX_HDR 0
+#define RDS_MSG_RX_START 1
+#define RDS_MSG_RX_END 2
+#define RDS_MSG_RX_CMSG 3
struct rds_incoming {
atomic_t i_refcount;
@@ -262,6 +270,7 @@ struct rds_incoming {
rds_rdma_cookie_t i_rdma_cookie;
struct timeval i_rx_tstamp;
+ u64 i_rx_lat_trace[RDS_RX_MAX_TRACES];
};
struct rds_mr {
@@ -419,6 +428,7 @@ struct rds_message {
} rdma;
struct rm_data_op {
unsigned int op_active:1;
+ unsigned int op_notify:1;
unsigned int op_nents;
unsigned int op_count;
unsigned int op_dmasg;
@@ -571,6 +581,10 @@ struct rds_sock {
unsigned char rs_recverr,
rs_cong_monitor;
u32 rs_hash_initval;
+
+ /* Socket receive path trace points*/
+ u8 rs_rx_traces;
+ u8 rs_rx_trace[RDS_MSG_RX_DGRAM_TRACE_MAX];
};
static inline struct rds_sock *rds_sk_to_rs(const struct sock *sk)
@@ -630,6 +644,9 @@ struct rds_statistics {
uint64_t s_cong_update_received;
uint64_t s_cong_send_error;
uint64_t s_cong_send_blocked;
+ uint64_t s_recv_bytes_added_to_socket;
+ uint64_t s_recv_bytes_removed_from_socket;
+
};
/* af_rds.c */
diff --git a/net/rds/recv.c b/net/rds/recv.c
index 9d0666e5fe35..8b7e7b7f2c2d 100644
--- a/net/rds/recv.c
+++ b/net/rds/recv.c
@@ -43,6 +43,8 @@
void rds_inc_init(struct rds_incoming *inc, struct rds_connection *conn,
__be32 saddr)
{
+ int i;
+
atomic_set(&inc->i_refcount, 1);
INIT_LIST_HEAD(&inc->i_item);
inc->i_conn = conn;
@@ -50,6 +52,9 @@ void rds_inc_init(struct rds_incoming *inc, struct rds_connection *conn,
inc->i_rdma_cookie = 0;
inc->i_rx_tstamp.tv_sec = 0;
inc->i_rx_tstamp.tv_usec = 0;
+
+ for (i = 0; i < RDS_RX_MAX_TRACES; i++)
+ inc->i_rx_lat_trace[i] = 0;
}
EXPORT_SYMBOL_GPL(rds_inc_init);
@@ -94,6 +99,10 @@ static void rds_recv_rcvbuf_delta(struct rds_sock *rs, struct sock *sk,
return;
rs->rs_rcv_bytes += delta;
+ if (delta > 0)
+ rds_stats_add(s_recv_bytes_added_to_socket, delta);
+ else
+ rds_stats_add(s_recv_bytes_removed_from_socket, -delta);
now_congested = rs->rs_rcv_bytes > rds_sk_rcvbuf(rs);
rdsdebug("rs %p (%pI4:%u) recv bytes %d buf %d "
@@ -369,6 +378,7 @@ void rds_recv_incoming(struct rds_connection *conn, __be32 saddr, __be32 daddr,
if (sock_flag(sk, SOCK_RCVTSTAMP))
do_gettimeofday(&inc->i_rx_tstamp);
rds_inc_addref(inc);
+ inc->i_rx_lat_trace[RDS_MSG_RX_END] = local_clock();
list_add_tail(&inc->i_item, &rs->rs_recv_queue);
__rds_wake_sk_sleep(sk);
} else {
@@ -530,7 +540,7 @@ static int rds_cmsg_recv(struct rds_incoming *inc, struct msghdr *msg,
ret = put_cmsg(msg, SOL_RDS, RDS_CMSG_RDMA_DEST,
sizeof(inc->i_rdma_cookie), &inc->i_rdma_cookie);
if (ret)
- return ret;
+ goto out;
}
if ((inc->i_rx_tstamp.tv_sec != 0) &&
@@ -539,10 +549,30 @@ static int rds_cmsg_recv(struct rds_incoming *inc, struct msghdr *msg,
sizeof(struct timeval),
&inc->i_rx_tstamp);
if (ret)
- return ret;
+ goto out;
}
- return 0;
+ if (rs->rs_rx_traces) {
+ struct rds_cmsg_rx_trace t;
+ int i, j;
+
+ inc->i_rx_lat_trace[RDS_MSG_RX_CMSG] = local_clock();
+ t.rx_traces = rs->rs_rx_traces;
+ for (i = 0; i < rs->rs_rx_traces; i++) {
+ j = rs->rs_rx_trace[i];
+ t.rx_trace_pos[i] = j;
+ t.rx_trace[i] = inc->i_rx_lat_trace[j + 1] -
+ inc->i_rx_lat_trace[j];
+ }
+
+ ret = put_cmsg(msg, SOL_RDS, RDS_CMSG_RXPATH_LATENCY,
+ sizeof(t), &t);
+ if (ret)
+ goto out;
+ }
+
+out:
+ return ret;
}
int rds_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
diff --git a/net/rds/send.c b/net/rds/send.c
index 77c8c6e613ad..5cc64039caf7 100644
--- a/net/rds/send.c
+++ b/net/rds/send.c
@@ -476,12 +476,14 @@ void rds_rdma_send_complete(struct rds_message *rm, int status)
struct rm_rdma_op *ro;
struct rds_notifier *notifier;
unsigned long flags;
+ unsigned int notify = 0;
spin_lock_irqsave(&rm->m_rs_lock, flags);
+ notify = rm->rdma.op_notify | rm->data.op_notify;
ro = &rm->rdma;
if (test_bit(RDS_MSG_ON_SOCK, &rm->m_flags) &&
- ro->op_active && ro->op_notify && ro->op_notifier) {
+ ro->op_active && notify && ro->op_notifier) {
notifier = ro->op_notifier;
rs = rm->m_rs;
sock_hold(rds_rs_to_sk(rs));
@@ -945,6 +947,11 @@ static int rds_cmsg_send(struct rds_sock *rs, struct rds_message *rm,
ret = rds_cmsg_rdma_map(rs, rm, cmsg);
if (!ret)
*allocated_mr = 1;
+ else if (ret == -ENODEV)
+ /* Accommodate the get_mr() case which can fail
+ * if connection isn't established yet.
+ */
+ ret = -EAGAIN;
break;
case RDS_CMSG_ATOMIC_CSWP:
case RDS_CMSG_ATOMIC_FADD:
@@ -987,6 +994,26 @@ static int rds_send_mprds_hash(struct rds_sock *rs, struct rds_connection *conn)
return hash;
}
+static int rds_rdma_bytes(struct msghdr *msg, size_t *rdma_bytes)
+{
+ struct rds_rdma_args *args;
+ struct cmsghdr *cmsg;
+
+ for_each_cmsghdr(cmsg, msg) {
+ if (!CMSG_OK(msg, cmsg))
+ return -EINVAL;
+
+ if (cmsg->cmsg_level != SOL_RDS)
+ continue;
+
+ if (cmsg->cmsg_type == RDS_CMSG_RDMA_ARGS) {
+ args = CMSG_DATA(cmsg);
+ *rdma_bytes += args->remote_vec.bytes;
+ }
+ }
+ return 0;
+}
+
int rds_sendmsg(struct socket *sock, struct msghdr *msg, size_t payload_len)
{
struct sock *sk = sock->sk;
@@ -1001,6 +1028,7 @@ int rds_sendmsg(struct socket *sock, struct msghdr *msg, size_t payload_len)
int nonblock = msg->msg_flags & MSG_DONTWAIT;
long timeo = sock_sndtimeo(sk, nonblock);
struct rds_conn_path *cpath;
+ size_t total_payload_len = payload_len, rdma_payload_len = 0;
/* Mirror Linux UDP mirror of BSD error message compatibility */
/* XXX: Perhaps MSG_MORE someday */
@@ -1033,6 +1061,16 @@ int rds_sendmsg(struct socket *sock, struct msghdr *msg, size_t payload_len)
}
release_sock(sk);
+ ret = rds_rdma_bytes(msg, &rdma_payload_len);
+ if (ret)
+ goto out;
+
+ total_payload_len += rdma_payload_len;
+ if (max_t(size_t, payload_len, rdma_payload_len) > RDS_MAX_MSG_SIZE) {
+ ret = -EMSGSIZE;
+ goto out;
+ }
+
if (payload_len > rds_sk_sndbuf(rs)) {
ret = -EMSGSIZE;
goto out;
@@ -1082,8 +1120,12 @@ int rds_sendmsg(struct socket *sock, struct msghdr *msg, size_t payload_len)
/* Parse any control messages the user may have included. */
ret = rds_cmsg_send(rs, rm, msg, &allocated_mr);
- if (ret)
+ if (ret) {
+ /* Trigger connection so that its ready for the next retry */
+ if (ret == -EAGAIN)
+ rds_conn_connect_if_down(conn);
goto out;
+ }
if (rm->rdma.op_active && !conn->c_trans->xmit_rdma) {
printk_ratelimited(KERN_NOTICE "rdma_op %p conn xmit_rdma %p\n",
@@ -1169,7 +1211,7 @@ out:
* or
* RDS_FLAG_HB_PONG|RDS_FLAG_ACK_REQUIRED
*/
-int
+static int
rds_send_probe(struct rds_conn_path *cp, __be16 sport,
__be16 dport, u8 h_flags)
{
@@ -1238,7 +1280,7 @@ rds_send_pong(struct rds_conn_path *cp, __be16 dport)
return rds_send_probe(cp, 0, dport, 0);
}
-void
+static void
rds_send_ping(struct rds_connection *conn)
{
unsigned long flags;
diff --git a/net/rds/tcp_listen.c b/net/rds/tcp_listen.c
index f74bab3ecdca..67d0929c7d3d 100644
--- a/net/rds/tcp_listen.c
+++ b/net/rds/tcp_listen.c
@@ -79,6 +79,7 @@ bail:
* smaller ip address, we recycle conns in RDS_CONN_ERROR on the passive side
* by moving them to CONNECTING in this function.
*/
+static
struct rds_tcp_connection *rds_tcp_accept_one_path(struct rds_connection *conn)
{
int i;
diff --git a/net/rds/tcp_recv.c b/net/rds/tcp_recv.c
index ad4892e97f91..e006ef8e6d40 100644
--- a/net/rds/tcp_recv.c
+++ b/net/rds/tcp_recv.c
@@ -180,6 +180,9 @@ static int rds_tcp_data_recv(read_descriptor_t *desc, struct sk_buff *skb,
rdsdebug("alloced tinc %p\n", tinc);
rds_inc_path_init(&tinc->ti_inc, cp,
cp->cp_conn->c_faddr);
+ tinc->ti_inc.i_rx_lat_trace[RDS_MSG_RX_HDR] =
+ local_clock();
+
/*
* XXX * we might be able to use the __ variants when
* we've already serialized at a higher level.
@@ -204,6 +207,8 @@ static int rds_tcp_data_recv(read_descriptor_t *desc, struct sk_buff *skb,
/* could be 0 for a 0 len message */
tc->t_tinc_data_rem =
be32_to_cpu(tinc->ti_inc.i_hdr.h_len);
+ tinc->ti_inc.i_rx_lat_trace[RDS_MSG_RX_START] =
+ local_clock();
}
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-28 05:03:45 +0000