int
lnet_fail_nid(lnet_nid_t nid, unsigned int threshold)
{
- lnet_test_peer_t *tp;
+ struct lnet_test_peer *tp;
struct list_head *el;
struct list_head *next;
struct list_head cull;
lnet_net_lock(0);
list_for_each_safe(el, next, &the_lnet.ln_test_peers) {
- tp = list_entry(el, lnet_test_peer_t, tp_list);
+ tp = list_entry(el, struct lnet_test_peer, tp_list);
if (tp->tp_threshold == 0 || /* needs culling anyway */
nid == LNET_NID_ANY || /* removing all entries */
lnet_net_unlock(0);
while (!list_empty(&cull)) {
- tp = list_entry(cull.next, lnet_test_peer_t, tp_list);
+ tp = list_entry(cull.next, struct lnet_test_peer, tp_list);
list_del(&tp->tp_list);
LIBCFS_FREE(tp, sizeof(*tp));
static int
fail_peer (lnet_nid_t nid, int outgoing)
{
- lnet_test_peer_t *tp;
+ struct lnet_test_peer *tp;
struct list_head *el;
struct list_head *next;
struct list_head cull;
lnet_net_lock(0);
list_for_each_safe(el, next, &the_lnet.ln_test_peers) {
- tp = list_entry(el, lnet_test_peer_t, tp_list);
+ tp = list_entry(el, struct lnet_test_peer, tp_list);
if (tp->tp_threshold == 0) {
/* zombie entry */
lnet_net_unlock(0);
while (!list_empty(&cull)) {
- tp = list_entry(cull.next, lnet_test_peer_t, tp_list);
+ tp = list_entry(cull.next, struct lnet_test_peer, tp_list);
list_del(&tp->tp_list);
LIBCFS_FREE(tp, sizeof(*tp));
EXPORT_SYMBOL(lnet_extract_kiov);
void
-lnet_ni_recv(lnet_ni_t *ni, void *private, lnet_msg_t *msg, int delayed,
- unsigned int offset, unsigned int mlen, unsigned int rlen)
+lnet_ni_recv(struct lnet_ni *ni, void *private, struct lnet_msg *msg,
+ int delayed, unsigned int offset, unsigned int mlen,
+ unsigned int rlen)
{
unsigned int niov = 0;
struct kvec *iov = NULL;
niov, iov, kiov, offset, mlen,
rlen);
if (rc < 0)
- lnet_finalize(ni, msg, rc);
+ lnet_finalize(msg, rc);
}
static void
-lnet_setpayloadbuffer(lnet_msg_t *msg)
+lnet_setpayloadbuffer(struct lnet_msg *msg)
{
- lnet_libmd_t *md = msg->msg_md;
+ struct lnet_libmd *md = msg->msg_md;
LASSERT(msg->msg_len > 0);
LASSERT(!msg->msg_routing);
}
void
-lnet_prep_send(lnet_msg_t *msg, int type, lnet_process_id_t target,
+lnet_prep_send(struct lnet_msg *msg, int type, struct lnet_process_id target,
unsigned int offset, unsigned int len)
{
msg->msg_type = type;
}
static void
-lnet_ni_send(lnet_ni_t *ni, lnet_msg_t *msg)
+lnet_ni_send(struct lnet_ni *ni, struct lnet_msg *msg)
{
void *priv = msg->msg_private;
int rc;
rc = (ni->ni_net->net_lnd->lnd_send)(ni, priv, msg);
if (rc < 0)
- lnet_finalize(ni, msg, rc);
+ lnet_finalize(msg, rc);
}
static int
-lnet_ni_eager_recv(lnet_ni_t *ni, lnet_msg_t *msg)
+lnet_ni_eager_recv(struct lnet_ni *ni, struct lnet_msg *msg)
{
int rc;
* lock before calling lnd_query()
*/
static void
-lnet_ni_query_locked(lnet_ni_t *ni, struct lnet_peer_ni *lp)
+lnet_ni_query_locked(struct lnet_ni *ni, struct lnet_peer_ni *lp)
{
cfs_time_t last_alive = 0;
int cpt = lnet_cpt_of_nid_locked(lp->lpni_nid, ni);
* \retval -ECANCELED If the MD of the message has been unlinked.
*/
static int
-lnet_post_send_locked(lnet_msg_t *msg, int do_send)
+lnet_post_send_locked(struct lnet_msg *msg, int do_send)
{
struct lnet_peer_ni *lp = msg->msg_txpeer;
struct lnet_ni *ni = msg->msg_txni;
CNETERR("Dropping message for %s: peer not alive\n",
libcfs_id2str(msg->msg_target));
if (do_send)
- lnet_finalize(ni, msg, -EHOSTUNREACH);
+ lnet_finalize(msg, -EHOSTUNREACH);
lnet_net_lock(cpt);
return -EHOSTUNREACH;
"called on the MD/ME.\n",
libcfs_id2str(msg->msg_target));
if (do_send)
- lnet_finalize(ni, msg, -ECANCELED);
+ lnet_finalize(msg, -ECANCELED);
lnet_net_lock(cpt);
return -ECANCELED;
!list_empty(&lp->lpni_txq));
msg->msg_peertxcredit = 1;
- lp->lpni_txqnob += msg->msg_len + sizeof(lnet_hdr_t);
+ lp->lpni_txqnob += msg->msg_len + sizeof(struct lnet_hdr);
lp->lpni_txcredits--;
if (lp->lpni_txcredits < lp->lpni_mintxcredits)
}
-static lnet_rtrbufpool_t *
-lnet_msg2bufpool(lnet_msg_t *msg)
+static struct lnet_rtrbufpool *
+lnet_msg2bufpool(struct lnet_msg *msg)
{
- lnet_rtrbufpool_t *rbp;
+ struct lnet_rtrbufpool *rbp;
int cpt;
LASSERT(msg->msg_rx_committed);
}
static int
-lnet_post_routed_recv_locked (lnet_msg_t *msg, int do_recv)
+lnet_post_routed_recv_locked(struct lnet_msg *msg, int do_recv)
{
/* lnet_parse is going to lnet_net_unlock immediately after this, so it
* sets do_recv FALSE and I don't do the unlock/send/lock bit.
* I return LNET_CREDIT_WAIT if msg blocked and LNET_CREDIT_OK if
* received or OK to receive */
struct lnet_peer_ni *lp = msg->msg_rxpeer;
- lnet_rtrbufpool_t *rbp;
- lnet_rtrbuf_t *rb;
+ struct lnet_rtrbufpool *rbp;
+ struct lnet_rtrbuf *rb;
LASSERT (msg->msg_iov == NULL);
LASSERT (msg->msg_kiov == NULL);
}
LASSERT(!list_empty(&rbp->rbp_bufs));
- rb = list_entry(rbp->rbp_bufs.next, lnet_rtrbuf_t, rb_list);
+ rb = list_entry(rbp->rbp_bufs.next, struct lnet_rtrbuf, rb_list);
list_del(&rb->rb_list);
msg->msg_niov = rbp->rbp_npages;
}
void
-lnet_return_tx_credits_locked(lnet_msg_t *msg)
+lnet_return_tx_credits_locked(struct lnet_msg *msg)
{
struct lnet_peer_ni *txpeer = msg->msg_txpeer;
struct lnet_ni *txni = msg->msg_txni;
- lnet_msg_t *msg2;
+ struct lnet_msg *msg2;
if (msg->msg_txcredit) {
struct lnet_ni *ni = msg->msg_txni;
atomic_inc(&ni->ni_tx_credits);
if (tq->tq_credits <= 0) {
msg2 = list_entry(tq->tq_delayed.next,
- lnet_msg_t, msg_list);
+ struct lnet_msg, msg_list);
list_del(&msg2->msg_list);
LASSERT(msg2->msg_txni == ni);
LASSERT((txpeer->lpni_txcredits < 0) ==
!list_empty(&txpeer->lpni_txq));
- txpeer->lpni_txqnob -= msg->msg_len + sizeof(lnet_hdr_t);
+ txpeer->lpni_txqnob -= msg->msg_len + sizeof(struct lnet_hdr);
LASSERT(txpeer->lpni_txqnob >= 0);
txpeer->lpni_txcredits++;
if (txpeer->lpni_txcredits <= 0) {
msg2 = list_entry(txpeer->lpni_txq.next,
- lnet_msg_t, msg_list);
+ struct lnet_msg, msg_list);
list_del(&msg2->msg_list);
spin_unlock(&txpeer->lpni_lock);
}
void
-lnet_schedule_blocked_locked(lnet_rtrbufpool_t *rbp)
+lnet_schedule_blocked_locked(struct lnet_rtrbufpool *rbp)
{
- lnet_msg_t *msg;
+ struct lnet_msg *msg;
if (list_empty(&rbp->rbp_msgs))
return;
msg = list_entry(rbp->rbp_msgs.next,
- lnet_msg_t, msg_list);
+ struct lnet_msg, msg_list);
list_del(&msg->msg_list);
(void)lnet_post_routed_recv_locked(msg, 1);
void
lnet_drop_routed_msgs_locked(struct list_head *list, int cpt)
{
- lnet_msg_t *msg;
- lnet_msg_t *tmp;
+ struct lnet_msg *msg;
+ struct lnet_msg *tmp;
lnet_net_unlock(cpt);
lnet_ni_recv(msg->msg_rxni, msg->msg_private, NULL,
0, 0, 0, msg->msg_hdr.payload_length);
list_del_init(&msg->msg_list);
- lnet_finalize(NULL, msg, -ECANCELED);
+ lnet_finalize(msg, -ECANCELED);
}
lnet_net_lock(cpt);
}
void
-lnet_return_rx_credits_locked(lnet_msg_t *msg)
+lnet_return_rx_credits_locked(struct lnet_msg *msg)
{
- struct lnet_peer_ni *rxpeer = msg->msg_rxpeer;
- struct lnet_ni *rxni = msg->msg_rxni;
- lnet_msg_t *msg2;
+ struct lnet_peer_ni *rxpeer = msg->msg_rxpeer;
+ struct lnet_ni *rxni = msg->msg_rxni;
+ struct lnet_msg *msg2;
if (msg->msg_rtrcredit) {
/* give back global router credits */
- lnet_rtrbuf_t *rb;
- lnet_rtrbufpool_t *rbp;
+ struct lnet_rtrbuf *rb;
+ struct lnet_rtrbufpool *rbp;
/* NB If a msg ever blocks for a buffer in rbp_msgs, it stays
* there until it gets one allocated, or aborts the wait
* itself */
LASSERT(msg->msg_kiov != NULL);
- rb = list_entry(msg->msg_kiov, lnet_rtrbuf_t, rb_kiov[0]);
+ rb = list_entry(msg->msg_kiov, struct lnet_rtrbuf, rb_kiov[0]);
rbp = rb->rb_pool;
msg->msg_kiov = NULL;
lnet_drop_routed_msgs_locked(&drop, msg->msg_rx_cpt);
} else if (rxpeer->lpni_rtrcredits <= 0) {
msg2 = list_entry(rxpeer->lpni_rtrq.next,
- lnet_msg_t, msg_list);
+ struct lnet_msg, msg_list);
list_del(&msg2->msg_list);
spin_unlock(&rxpeer->lpni_lock);
(void) lnet_post_routed_recv_locked(msg2, 1);
}
static int
-lnet_compare_routes(lnet_route_t *r1, lnet_route_t *r2)
+lnet_compare_routes(struct lnet_route *r1, struct lnet_route *r2)
{
struct lnet_peer_ni *p1 = r1->lr_gateway;
struct lnet_peer_ni *p2 = r2->lr_gateway;
lnet_find_route_locked(struct lnet_net *net, lnet_nid_t target,
lnet_nid_t rtr_nid)
{
- lnet_remotenet_t *rnet;
- lnet_route_t *route;
- lnet_route_t *best_route;
- lnet_route_t *last_route;
+ struct lnet_remotenet *rnet;
+ struct lnet_route *route;
+ struct lnet_route *best_route;
+ struct lnet_route *last_route;
struct lnet_peer_ni *lpni_best;
struct lnet_peer_ni *lp;
int rc;
return lpni_best;
}
+static struct lnet_ni *
+lnet_get_best_ni(struct lnet_net *local_net, struct lnet_ni *cur_ni,
+ int md_cpt)
+{
+ struct lnet_ni *ni = NULL, *best_ni = cur_ni;
+ unsigned int shortest_distance;
+ int best_credits;
+
+ if (best_ni == NULL) {
+ shortest_distance = UINT_MAX;
+ best_credits = INT_MIN;
+ } else {
+ shortest_distance = cfs_cpt_distance(lnet_cpt_table(), md_cpt,
+ best_ni->ni_dev_cpt);
+ best_credits = atomic_read(&best_ni->ni_tx_credits);
+ }
+
+ while ((ni = lnet_get_next_ni_locked(local_net, ni))) {
+ unsigned int distance;
+ int ni_credits;
+
+ if (!lnet_is_ni_healthy_locked(ni))
+ continue;
+
+ ni_credits = atomic_read(&ni->ni_tx_credits);
+
+ /*
+ * calculate the distance from the CPT on which
+ * the message memory is allocated to the CPT of
+ * the NI's physical device
+ */
+ distance = cfs_cpt_distance(lnet_cpt_table(),
+ md_cpt,
+ ni->ni_dev_cpt);
+
+ /*
+ * All distances smaller than the NUMA range
+ * are treated equally.
+ */
+ if (distance < lnet_numa_range)
+ distance = lnet_numa_range;
+
+ /*
+ * Select on shorter distance, then available
+ * credits, then round-robin.
+ */
+ if (distance > shortest_distance) {
+ continue;
+ } else if (distance < shortest_distance) {
+ shortest_distance = distance;
+ } else if (ni_credits < best_credits) {
+ continue;
+ } else if (ni_credits == best_credits) {
+ if (best_ni && (best_ni)->ni_seq <= ni->ni_seq)
+ continue;
+ }
+ best_ni = ni;
+ best_credits = ni_credits;
+ }
+
+ return best_ni;
+}
+
static int
lnet_select_pathway(lnet_nid_t src_nid, lnet_nid_t dst_nid,
struct lnet_msg *msg, lnet_nid_t rtr_nid)
struct lnet_peer_ni *best_lpni;
struct lnet_peer_ni *best_gw;
struct lnet_peer_ni *lpni;
+ struct lnet_peer_ni *final_dst;
struct lnet_peer *peer;
struct lnet_peer_net *peer_net;
struct lnet_net *local_net;
- struct lnet_ni *ni;
__u32 seq;
int cpt, cpt2, rc;
bool routing;
+ bool routing2;
bool ni_is_pref;
bool preferred;
- int best_credits;
+ bool local_found;
int best_lpni_credits;
int md_cpt;
- int shortest_distance;
/*
* get an initial CPT to use for locking. The idea here is not to
* then we proceed, if there is, then we restart the operation.
*/
cpt = lnet_net_lock_current();
+
+ md_cpt = lnet_cpt_of_md(msg->msg_md);
+ if (md_cpt == CFS_CPT_ANY)
+ md_cpt = cpt;
+
again:
best_ni = NULL;
best_lpni = NULL;
best_gw = NULL;
+ final_dst = NULL;
local_net = NULL;
routing = false;
+ routing2 = false;
+ local_found = false;
seq = lnet_get_dlc_seq_locked();
- if (the_lnet.ln_shutdown) {
+ if (the_lnet.ln_state != LNET_STATE_RUNNING) {
lnet_net_unlock(cpt);
return -ESHUTDOWN;
}
- if (msg->msg_md != NULL)
- /* get the cpt of the MD, used during NUMA based selection */
- md_cpt = lnet_cpt_of_cookie(msg->msg_md->md_lh.lh_cookie);
- else
- md_cpt = CFS_CPT_ANY;
-
peer = lnet_find_or_create_peer_locked(dst_nid, cpt);
if (IS_ERR(peer)) {
lnet_net_unlock(cpt);
}
/*
- * STEP 1: first jab at determineing best_ni
+ * STEP 1: first jab at determining best_ni
* if src_nid is explicitly specified, then best_ni is already
* pre-determiend for us. Otherwise we need to select the best
* one to use later on
libcfs_nid2str(src_nid));
return -EINVAL;
}
+ }
+
+ if (msg->msg_type == LNET_MSG_REPLY ||
+ msg->msg_type == LNET_MSG_ACK ||
+ !peer->lp_multi_rail ||
+ best_ni) {
+ /*
+ * for replies we want to respond on the same peer_ni we
+ * received the message on if possible. If not, then pick
+ * a peer_ni to send to
+ *
+ * if the peer is non-multi-rail then you want to send to
+ * the dst_nid provided as well.
+ *
+ * If the best_ni has already been determined, IE the
+ * src_nid has been specified, then use the
+ * destination_nid provided as well, since we're
+ * continuing a series of related messages for the same
+ * RPC.
+ *
+ * It is expected to find the lpni using dst_nid, since we
+ * created it earlier.
+ */
+ best_lpni = lnet_find_peer_ni_locked(dst_nid);
+ if (best_lpni)
+ lnet_peer_ni_decref_locked(best_lpni);
+
+ if (best_lpni && !lnet_get_net_locked(LNET_NIDNET(dst_nid))) {
+ /*
+ * this lpni is not on a local network so we need
+ * to route this reply.
+ */
+ best_gw = lnet_find_route_locked(NULL,
+ best_lpni->lpni_nid,
+ rtr_nid);
+ if (best_gw) {
+ /*
+ * RULE: Each node considers only the next-hop
+ *
+ * We're going to route the message, so change the peer to
+ * the router.
+ */
+ LASSERT(best_gw->lpni_peer_net);
+ LASSERT(best_gw->lpni_peer_net->lpn_peer);
+ peer = best_gw->lpni_peer_net->lpn_peer;
+
+ /*
+ * if the router is not multi-rail then use the best_gw
+ * found to send the message to
+ */
+ if (!peer->lp_multi_rail)
+ best_lpni = best_gw;
+ else
+ best_lpni = NULL;
- if (best_ni->ni_net->net_id != LNET_NIDNET(dst_nid)) {
+ routing = true;
+ } else {
+ best_lpni = NULL;
+ }
+ } else if (!best_lpni) {
lnet_net_unlock(cpt);
- LCONSOLE_WARN("No route to %s via from %s\n",
- libcfs_nid2str(dst_nid),
- libcfs_nid2str(src_nid));
+ CERROR("unable to send msg_type %d to "
+ "originating %s. Destination NID not in DB\n",
+ msg->msg_type, libcfs_nid2str(dst_nid));
return -EINVAL;
}
- goto pick_peer;
}
/*
- * Decide whether we need to route to peer_ni.
- * Get the local net that I need to be on to be able to directly
- * send to that peer.
+ * if the peer is not MR capable, then we should always send to it
+ * using the first NI in the NET we determined.
+ */
+ if (!peer->lp_multi_rail) {
+ if (!best_lpni) {
+ lnet_net_unlock(cpt);
+ CERROR("no route to %s\n",
+ libcfs_nid2str(dst_nid));
+ return -EHOSTUNREACH;
+ }
+
+ /* best ni could be set because src_nid was provided */
+ if (!best_ni) {
+ best_ni = lnet_net2ni_locked(best_lpni->lpni_net->net_id, cpt);
+ if (!best_ni) {
+ lnet_net_unlock(cpt);
+ CERROR("no path to %s from net %s\n",
+ libcfs_nid2str(best_lpni->lpni_nid),
+ libcfs_net2str(best_lpni->lpni_net->net_id));
+ return -EHOSTUNREACH;
+ }
+ }
+ }
+
+ /*
+ * if we already found a best_ni because src_nid is specified and
+ * best_lpni because we are replying to a message then just send
+ * the message
+ */
+ if (best_ni && best_lpni)
+ goto send;
+
+ /*
+ * If we already found a best_ni because src_nid is specified then
+ * pick the peer then send the message
+ */
+ if (best_ni)
+ goto pick_peer;
+
+ /*
+ * pick the best_ni by going through all the possible networks of
+ * that peer and see which local NI is best suited to talk to that
+ * peer.
*
- * a. Find the peer which the dst_nid belongs to.
- * b. Iterate through each of the peer_nets/nis to decide
- * the best peer/local_ni pair to use
+ * Locally connected networks will always be preferred over
+ * a routed network. If there are only routed paths to the peer,
+ * then the best route is chosen. If all routes are equal then
+ * they are used in round robin.
*/
- shortest_distance = INT_MAX;
- best_credits = INT_MIN;
list_for_each_entry(peer_net, &peer->lp_peer_nets, lpn_on_peer_list) {
if (!lnet_is_peer_net_healthy_locked(peer_net))
continue;
local_net = lnet_get_net_locked(peer_net->lpn_net_id);
- if (!local_net) {
+ if (!local_net && !routing && !local_found) {
struct lnet_peer_ni *net_gw;
- /*
- * go through each peer_ni on that peer_net and
- * determine the best possible gw to go through
- */
- list_for_each_entry(lpni, &peer_net->lpn_peer_nis,
- lpni_on_peer_net_list) {
- net_gw = lnet_find_route_locked(NULL,
- lpni->lpni_nid,
- rtr_nid);
+ lpni = list_entry(peer_net->lpn_peer_nis.next,
+ struct lnet_peer_ni,
+ lpni_on_peer_net_list);
+
+ net_gw = lnet_find_route_locked(NULL,
+ lpni->lpni_nid,
+ rtr_nid);
+ if (!net_gw)
+ continue;
+
+ if (best_gw) {
/*
- * if no route is found for that network then
- * move onto the next peer_ni in the peer
+ * lnet_find_route_locked() call
+ * will return the best_Gw on the
+ * lpni->lpni_nid network.
+ * However, best_gw and net_gw can
+ * be on different networks.
+ * Therefore need to compare them
+ * to pick the better of either.
*/
- if (!net_gw)
+ if (lnet_compare_peers(best_gw, net_gw) > 0)
+ continue;
+ if (best_gw->lpni_gw_seq <= net_gw->lpni_gw_seq)
continue;
-
- if (!best_gw) {
- best_gw = net_gw;
- best_lpni = lpni;
- } else {
- rc = lnet_compare_peers(net_gw,
- best_gw);
- if (rc > 0) {
- best_gw = net_gw;
- best_lpni = lpni;
- }
- }
}
+ best_gw = net_gw;
+ final_dst = lpni;
- if (!best_gw)
- continue;
-
- local_net = lnet_get_net_locked
- (LNET_NIDNET(best_gw->lpni_nid));
- routing = true;
+ routing2 = true;
} else {
- routing = false;
best_gw = NULL;
+ final_dst = NULL;
+ routing2 = false;
+ local_found = true;
}
- /* no routable net found go on to a different net */
+ /*
+ * a gw on this network is found, but there could be
+ * other better gateways on other networks. So don't pick
+ * the best_ni until we determine the best_gw.
+ */
+ if (best_gw)
+ continue;
+
+ /* if no local_net found continue */
if (!local_net)
continue;
* 2. NI available credits
* 3. Round Robin
*/
- ni = NULL;
- while ((ni = lnet_get_next_ni_locked(local_net, ni))) {
- int ni_credits;
- int distance;
-
- if (!lnet_is_ni_healthy_locked(ni))
- continue;
-
- ni_credits = atomic_read(&ni->ni_tx_credits);
-
- /*
- * calculate the distance from the CPT on which
- * the message memory is allocated to the CPT of
- * the NI's physical device
- */
- distance = cfs_cpt_distance(lnet_cpt_table(),
- md_cpt,
- ni->dev_cpt);
-
- /*
- * All distances smaller than the NUMA range
- * are treated equally.
- */
- if (distance < lnet_get_numa_range())
- distance = lnet_get_numa_range();
-
- /*
- * Select on shorter distance, then available
- * credits, then round-robin.
- */
- if (distance > shortest_distance) {
- continue;
- } else if (distance < shortest_distance) {
- shortest_distance = distance;
- } else if (ni_credits < best_credits) {
- continue;
- } else if (ni_credits == best_credits) {
- if (best_ni && best_ni->ni_seq <= ni->ni_seq)
- continue;
- }
- best_ni = ni;
- best_credits = ni_credits;
- }
+ best_ni = lnet_get_best_ni(local_net, best_ni, md_cpt);
}
- /*
- * if the peer is not MR capable, then we should always send to it
- * using the first NI in the NET we determined.
- */
- if (!peer->lp_multi_rail && local_net != NULL)
- best_ni = lnet_net2ni_locked(local_net->net_id, cpt);
-
- if (!best_ni) {
+ if (!best_ni && !best_gw) {
lnet_net_unlock(cpt);
LCONSOLE_WARN("No local ni found to send from to %s\n",
libcfs_nid2str(dst_nid));
return -EINVAL;
}
+ if (!best_ni) {
+ best_ni = lnet_get_best_ni(best_gw->lpni_net, best_ni, md_cpt);
+ LASSERT(best_gw && best_ni);
+
+ /*
+ * We're going to route the message, so change the peer to
+ * the router.
+ */
+ LASSERT(best_gw->lpni_peer_net);
+ LASSERT(best_gw->lpni_peer_net->lpn_peer);
+ best_gw->lpni_gw_seq++;
+ peer = best_gw->lpni_peer_net->lpn_peer;
+ }
+
/*
* Now that we selected the NI to use increment its sequence
* number so the Round Robin algorithm will detect that it has
*/
best_ni->ni_seq++;
- if (routing)
- goto send;
-
pick_peer:
- if (best_ni == the_lnet.ln_loni) {
- /* No send credit hassles with LOLND */
- lnet_ni_addref_locked(best_ni, cpt);
- msg->msg_hdr.dest_nid = cpu_to_le64(best_ni->ni_nid);
- if (!msg->msg_routing)
- msg->msg_hdr.src_nid = cpu_to_le64(best_ni->ni_nid);
- msg->msg_target.nid = best_ni->ni_nid;
- lnet_msg_commit(msg, cpt);
- msg->msg_txni = best_ni;
- lnet_net_unlock(cpt);
-
- return LNET_CREDIT_OK;
- }
-
- if (msg->msg_type == LNET_MSG_REPLY ||
- msg->msg_type == LNET_MSG_ACK) {
- /*
- * for replies we want to respond on the same peer_ni we
- * received the message on if possible. If not, then pick
- * a peer_ni to send to
- */
- best_lpni = lnet_find_peer_ni_locked(dst_nid);
- if (best_lpni) {
- lnet_peer_ni_decref_locked(best_lpni);
- goto send;
- } else {
- CDEBUG(D_NET, "unable to send msg_type %d to "
- "originating %s\n", msg->msg_type,
- libcfs_nid2str(dst_nid));
- }
- }
-
+ /*
+ * At this point the best_ni is on a local network on which
+ * the peer has a peer_ni as well
+ */
peer_net = lnet_peer_get_net_locked(peer,
best_ni->ni_net->net_id);
/*
libcfs_nid2str(best_gw->lpni_nid),
lnet_msgtyp2str(msg->msg_type), msg->msg_len);
- best_lpni = lnet_find_peer_ni_locked(dst_nid);
- LASSERT(best_lpni != NULL);
- lnet_peer_ni_decref_locked(best_lpni);
-
- routing = true;
-
- goto send;
+ routing2 = true;
+ /*
+ * RULE: Each node considers only the next-hop
+ *
+ * We're going to route the message, so change the peer to
+ * the router.
+ */
+ LASSERT(best_gw->lpni_peer_net);
+ LASSERT(best_gw->lpni_peer_net->lpn_peer);
+ peer = best_gw->lpni_peer_net->lpn_peer;
} else if (!lnet_is_peer_net_healthy_locked(peer_net)) {
/*
* this peer_net is unhealthy but we still have an opportunity
lpni = NULL;
best_lpni_credits = INT_MIN;
preferred = false;
+ best_lpni = NULL;
while ((lpni = lnet_get_next_peer_ni_locked(peer, peer_net, lpni))) {
/*
* if this peer ni is not healthy just skip it, no point in
/* if we still can't find a peer ni then we can't reach it */
if (!best_lpni) {
- __u32 net_id = peer_net->lpn_net_id;
+ __u32 net_id = (peer_net) ? peer_net->lpn_net_id :
+ LNET_NIDNET(dst_nid);
lnet_net_unlock(cpt);
LCONSOLE_WARN("no peer_ni found on peer net %s\n",
libcfs_net2str(net_id));
return -EHOSTUNREACH;
}
+
send:
+ /* Shortcut for loopback. */
+ if (best_ni == the_lnet.ln_loni) {
+ /* No send credit hassles with LOLND */
+ lnet_ni_addref_locked(best_ni, cpt);
+ msg->msg_hdr.dest_nid = cpu_to_le64(best_ni->ni_nid);
+ if (!msg->msg_routing)
+ msg->msg_hdr.src_nid = cpu_to_le64(best_ni->ni_nid);
+ msg->msg_target.nid = best_ni->ni_nid;
+ lnet_msg_commit(msg, cpt);
+ msg->msg_txni = best_ni;
+ lnet_net_unlock(cpt);
+
+ return LNET_CREDIT_OK;
+ }
+
+ routing = routing || routing2;
+
/*
* Increment sequence number of the peer selected so that we
* pick the next one in Round Robin.
best_lpni->lpni_seq++;
/*
- * When routing the best gateway found acts as the best peer
- * NI to send to.
- */
- if (routing)
- best_lpni = best_gw;
-
- /*
* grab a reference on the peer_ni so it sticks around even if
* we need to drop and relock the lnet_net_lock below.
*/
* the router receives this message it knows how to route
* it.
*/
- msg->msg_hdr.dest_nid = cpu_to_le64(dst_nid);
+ msg->msg_hdr.dest_nid =
+ cpu_to_le64(final_dst ? final_dst->lpni_nid : dst_nid);
} else {
/*
* if we're not routing set the dest_nid to the best peer
}
int
-lnet_send(lnet_nid_t src_nid, lnet_msg_t *msg, lnet_nid_t rtr_nid)
+lnet_send(lnet_nid_t src_nid, struct lnet_msg *msg, lnet_nid_t rtr_nid)
{
lnet_nid_t dst_nid = msg->msg_target.nid;
int rc;
}
void
-lnet_drop_message(lnet_ni_t *ni, int cpt, void *private, unsigned int nob)
+lnet_drop_message(struct lnet_ni *ni, int cpt, void *private, unsigned int nob)
{
lnet_net_lock(cpt);
the_lnet.ln_counters[cpt]->drop_count++;
}
static void
-lnet_recv_put(lnet_ni_t *ni, lnet_msg_t *msg)
+lnet_recv_put(struct lnet_ni *ni, struct lnet_msg *msg)
{
- lnet_hdr_t *hdr = &msg->msg_hdr;
+ struct lnet_hdr *hdr = &msg->msg_hdr;
if (msg->msg_wanted != 0)
lnet_setpayloadbuffer(msg);
}
static int
-lnet_parse_put(lnet_ni_t *ni, lnet_msg_t *msg)
+lnet_parse_put(struct lnet_ni *ni, struct lnet_msg *msg)
{
- lnet_hdr_t *hdr = &msg->msg_hdr;
+ struct lnet_hdr *hdr = &msg->msg_hdr;
struct lnet_match_info info;
int rc;
bool ready_delay;
}
static int
-lnet_parse_get(lnet_ni_t *ni, lnet_msg_t *msg, int rdma_get)
+lnet_parse_get(struct lnet_ni *ni, struct lnet_msg *msg, int rdma_get)
{
- struct lnet_match_info info;
- lnet_hdr_t *hdr = &msg->msg_hdr;
- lnet_process_id_t source_id;
+ struct lnet_match_info info;
+ struct lnet_hdr *hdr = &msg->msg_hdr;
+ struct lnet_process_id source_id;
struct lnet_handle_wire reply_wmd;
- int rc;
+ int rc;
/* Convert get fields to host byte order */
hdr->msg.get.match_bits = le64_to_cpu(hdr->msg.get.match_bits);
libcfs_nid2str(ni->ni_nid),
libcfs_id2str(info.mi_id), rc);
- lnet_finalize(ni, msg, rc);
+ lnet_finalize(msg, rc);
}
return 0;
}
static int
-lnet_parse_reply(lnet_ni_t *ni, lnet_msg_t *msg)
+lnet_parse_reply(struct lnet_ni *ni, struct lnet_msg *msg)
{
void *private = msg->msg_private;
- lnet_hdr_t *hdr = &msg->msg_hdr;
- lnet_process_id_t src = {0};
- lnet_libmd_t *md;
+ struct lnet_hdr *hdr = &msg->msg_hdr;
+ struct lnet_process_id src = {0};
+ struct lnet_libmd *md;
int rlength;
int mlength;
int cpt;
}
static int
-lnet_parse_ack(lnet_ni_t *ni, lnet_msg_t *msg)
+lnet_parse_ack(struct lnet_ni *ni, struct lnet_msg *msg)
{
- lnet_hdr_t *hdr = &msg->msg_hdr;
- lnet_process_id_t src = {0};
- lnet_libmd_t *md;
+ struct lnet_hdr *hdr = &msg->msg_hdr;
+ struct lnet_process_id src = {0};
+ struct lnet_libmd *md;
int cpt;
src.nid = hdr->src_nid;
* \retval -ve error code
*/
int
-lnet_parse_forward_locked(lnet_ni_t *ni, lnet_msg_t *msg)
+lnet_parse_forward_locked(struct lnet_ni *ni, struct lnet_msg *msg)
{
int rc = 0;
}
int
-lnet_parse_local(lnet_ni_t *ni, lnet_msg_t *msg)
+lnet_parse_local(struct lnet_ni *ni, struct lnet_msg *msg)
{
int rc;
}
void
-lnet_print_hdr(lnet_hdr_t * hdr)
+lnet_print_hdr(struct lnet_hdr *hdr)
{
- lnet_process_id_t src = {0};
- lnet_process_id_t dst = {0};
+ struct lnet_process_id src = {
+ .nid = hdr->src_nid,
+ .pid = hdr->src_pid,
+ };
+ struct lnet_process_id dst = {
+ .nid = hdr->dest_nid,
+ .pid = hdr->dest_pid,
+ };
char *type_str = lnet_msgtyp2str(hdr->type);
- src.nid = hdr->src_nid;
- src.pid = hdr->src_pid;
-
- dst.nid = hdr->dest_nid;
- dst.pid = hdr->dest_pid;
-
CWARN("P3 Header at %p of type %s\n", hdr, type_str);
CWARN(" From %s\n", libcfs_id2str(src));
CWARN(" To %s\n", libcfs_id2str(dst));
}
int
-lnet_parse(lnet_ni_t *ni, lnet_hdr_t *hdr, lnet_nid_t from_nid,
+lnet_parse(struct lnet_ni *ni, struct lnet_hdr *hdr, lnet_nid_t from_nid,
void *private, int rdma_req)
{
int rc = 0;
msg->msg_hdr.dest_pid = dest_pid;
msg->msg_hdr.payload_length = payload_length;
}
- /* Multi-Rail: Primary NID of source. */
- msg->msg_initiator = lnet_peer_primary_nid(src_nid);
lnet_net_lock(cpt);
lpni = lnet_nid2peerni_locked(from_nid, cpt);
msg->msg_rxpeer = lpni;
msg->msg_rxni = ni;
lnet_ni_addref_locked(ni, cpt);
+ /* Multi-Rail: Primary NID of source. */
+ msg->msg_initiator = lnet_peer_primary_nid_locked(src_nid);
if (lnet_isrouter(msg->msg_rxpeer)) {
lnet_peer_set_alive(msg->msg_rxpeer);
free_drop:
LASSERT(msg->msg_md == NULL);
- lnet_finalize(ni, msg, rc);
+ lnet_finalize(msg, rc);
drop:
lnet_drop_message(ni, cpt, private, payload_length);
lnet_drop_delayed_msg_list(struct list_head *head, char *reason)
{
while (!list_empty(head)) {
- lnet_process_id_t id = {0};
- lnet_msg_t *msg;
+ struct lnet_process_id id = {0};
+ struct lnet_msg *msg;
- msg = list_entry(head->next, lnet_msg_t, msg_list);
+ msg = list_entry(head->next, struct lnet_msg, msg_list);
list_del(&msg->msg_list);
id.nid = msg->msg_hdr.src_nid;
* but we still should give error code so lnet_msg_decommit()
* can skip counters operations and other checks.
*/
- lnet_finalize(msg->msg_rxni, msg, -ENOENT);
+ lnet_finalize(msg, -ENOENT);
}
}
lnet_recv_delayed_msg_list(struct list_head *head)
{
while (!list_empty(head)) {
- lnet_msg_t *msg;
- lnet_process_id_t id;
+ struct lnet_msg *msg;
+ struct lnet_process_id id;
- msg = list_entry(head->next, lnet_msg_t, msg_list);
+ msg = list_entry(head->next, struct lnet_msg, msg_list);
list_del(&msg->msg_list);
/* md won't disappear under me, since each msg
* \retval -ENOMEM Memory allocation failure.
* \retval -ENOENT Invalid MD object.
*
- * \see lnet_event_t::hdr_data and lnet_event_kind_t.
+ * \see struct lnet_event::hdr_data and lnet_event_kind_t.
*/
int
-LNetPut(lnet_nid_t self, lnet_handle_md_t mdh, lnet_ack_req_t ack,
- lnet_process_id_t target, unsigned int portal,
+LNetPut(lnet_nid_t self, struct lnet_handle_md mdh, enum lnet_ack_req ack,
+ struct lnet_process_id target, unsigned int portal,
__u64 match_bits, unsigned int offset,
__u64 hdr_data)
{
msg = lnet_msg_alloc();
if (msg == NULL) {
- CERROR("Dropping PUT to %s: ENOMEM on lnet_msg_t\n",
+ CERROR("Dropping PUT to %s: ENOMEM on struct lnet_msg\n",
libcfs_id2str(target));
return -ENOMEM;
}
if (rc != 0) {
CNETERR("Error sending PUT to %s: %d\n",
libcfs_id2str(target), rc);
- lnet_finalize(NULL, msg, rc);
+ lnet_finalize(msg, rc);
}
/* completion will be signalled by an event */
}
EXPORT_SYMBOL(LNetPut);
-lnet_msg_t *
-lnet_create_reply_msg (lnet_ni_t *ni, lnet_msg_t *getmsg)
+/*
+ * The LND can DMA direct to the GET md (i.e. no REPLY msg). This
+ * returns a msg for the LND to pass to lnet_finalize() when the sink
+ * data has been received.
+ *
+ * CAVEAT EMPTOR: 'getmsg' is the original GET, which is freed when
+ * lnet_finalize() is called on it, so the LND must call this first
+ */
+struct lnet_msg *
+lnet_create_reply_msg(struct lnet_ni *ni, struct lnet_msg *getmsg)
{
- /* The LND can DMA direct to the GET md (i.e. no REPLY msg). This
- * returns a msg for the LND to pass to lnet_finalize() when the sink
- * data has been received.
- *
- * CAVEAT EMPTOR: 'getmsg' is the original GET, which is freed when
- * lnet_finalize() is called on it, so the LND must call this first */
-
- struct lnet_msg *msg = lnet_msg_alloc();
- struct lnet_libmd *getmd = getmsg->msg_md;
- lnet_process_id_t peer_id = getmsg->msg_target;
- int cpt;
+ struct lnet_msg *msg = lnet_msg_alloc();
+ struct lnet_libmd *getmd = getmsg->msg_md;
+ struct lnet_process_id peer_id = getmsg->msg_target;
+ int cpt;
LASSERT(!getmsg->msg_target_is_router);
LASSERT(!getmsg->msg_routing);
libcfs_nid2str(ni->ni_nid), libcfs_id2str(peer_id), getmd);
/* setup information for lnet_build_msg_event */
- msg->msg_initiator = lnet_peer_primary_nid(peer_id.nid);
- /* Cheaper: msg->msg_initiator = getmsg->msg_txpeer->lp_nid; */
+ msg->msg_initiator = getmsg->msg_txpeer->lpni_peer_net->lpn_peer->lp_primary_nid;
msg->msg_from = peer_id.nid;
msg->msg_type = LNET_MSG_GET; /* flag this msg as an "optimized" GET */
msg->msg_hdr.src_nid = peer_id.nid;
EXPORT_SYMBOL(lnet_create_reply_msg);
void
-lnet_set_reply_msg_len(lnet_ni_t *ni, lnet_msg_t *reply, unsigned int len)
+lnet_set_reply_msg_len(struct lnet_ni *ni, struct lnet_msg *reply,
+ unsigned int len)
{
/* Set the REPLY length, now the RDMA that elides the REPLY message has
* completed and I know it. */
* \retval -ENOENT Invalid MD object.
*/
int
-LNetGet(lnet_nid_t self, lnet_handle_md_t mdh,
- lnet_process_id_t target, unsigned int portal,
+LNetGet(lnet_nid_t self, struct lnet_handle_md mdh,
+ struct lnet_process_id target, unsigned int portal,
__u64 match_bits, unsigned int offset)
{
struct lnet_msg *msg;
msg = lnet_msg_alloc();
if (msg == NULL) {
- CERROR("Dropping GET to %s: ENOMEM on lnet_msg_t\n",
+ CERROR("Dropping GET to %s: ENOMEM on struct lnet_msg\n",
libcfs_id2str(target));
return -ENOMEM;
}
if (rc < 0) {
CNETERR("Error sending GET to %s: %d\n",
libcfs_id2str(target), rc);
- lnet_finalize(NULL, msg, rc);
+ lnet_finalize(msg, rc);
}
/* completion will be signalled by an event */
LNetDist(lnet_nid_t dstnid, lnet_nid_t *srcnidp, __u32 *orderp)
{
struct list_head *e;
- struct lnet_ni *ni = NULL;
- lnet_remotenet_t *rnet;
+ struct lnet_ni *ni = NULL;
+ struct lnet_remotenet *rnet;
__u32 dstnet = LNET_NIDNET(dstnid);
int hops;
int cpt;
rn_list = lnet_net2rnethash(dstnet);
list_for_each(e, rn_list) {
- rnet = list_entry(e, lnet_remotenet_t, lrn_list);
+ rnet = list_entry(e, struct lnet_remotenet, lrn_list);
if (rnet->lrn_net == dstnet) {
- lnet_route_t *route;
- lnet_route_t *shortest = NULL;
+ struct lnet_route *route;
+ struct lnet_route *shortest = NULL;
__u32 shortest_hops = LNET_UNDEFINED_HOPS;
__u32 route_hops;
git://git.whamcloud.com / fs / lustre-release.git / blobdiff