Viewing: o2iblnd.c
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2011, 2017, Intel Corporation.
*/
/* This file is part of Lustre, http://www.lustre.org/
*
* Author: Eric Barton <eric@bartonsoftware.com>
*/
#include <linux/ethtool.h>
#include <lustre_compat/linux/inetdevice.h>
#include <linux/kernel.h>
#include <linux/sunrpc/addr.h>
#include <net/addrconf.h>
#include "o2iblnd.h"
static const struct lnet_lnd the_o2iblnd;
struct kib_data kiblnd_data;
static __u32
kiblnd_cksum(void *ptr, int nob)
{
char *c = ptr;
__u32 sum = 0;
while (nob-- > 0)
sum = ((sum << 1) | (sum >> 31)) + *c++;
/* ensure I don't return 0 (== no checksum) */
return (sum == 0) ? 1 : sum;
}
static char *
kiblnd_msgtype2str(int type)
{
switch (type) {
case IBLND_MSG_CONNREQ:
return "CONNREQ";
case IBLND_MSG_CONNACK:
return "CONNACK";
case IBLND_MSG_NOOP:
return "NOOP";
case IBLND_MSG_IMMEDIATE:
return "IMMEDIATE";
case IBLND_MSG_PUT_REQ:
return "PUT_REQ";
case IBLND_MSG_PUT_NAK:
return "PUT_NAK";
case IBLND_MSG_PUT_ACK:
return "PUT_ACK";
case IBLND_MSG_PUT_DONE:
return "PUT_DONE";
case IBLND_MSG_GET_REQ:
return "GET_REQ";
case IBLND_MSG_GET_DONE:
return "GET_DONE";
default:
return "???";
}
}
static int
kiblnd_msgtype2size(int type)
{
const int hdr_size = offsetof(struct kib_msg, ibm_u);
switch (type) {
case IBLND_MSG_CONNREQ:
case IBLND_MSG_CONNACK:
return hdr_size + sizeof(struct kib_connparams);
case IBLND_MSG_NOOP:
return hdr_size;
case IBLND_MSG_IMMEDIATE:
return offsetof(struct kib_msg, ibm_u.immediate.ibim_payload[0]);
case IBLND_MSG_PUT_REQ:
return hdr_size + sizeof(struct kib_putreq_msg);
case IBLND_MSG_PUT_ACK:
return hdr_size + sizeof(struct kib_putack_msg);
case IBLND_MSG_GET_REQ:
return hdr_size + sizeof(struct kib_get_msg);
case IBLND_MSG_PUT_NAK:
case IBLND_MSG_PUT_DONE:
case IBLND_MSG_GET_DONE:
return hdr_size + sizeof(struct kib_completion_msg);
default:
return -1;
}
}
static int kiblnd_unpack_rd(struct kib_msg *msg, bool flip)
{
struct kib_rdma_desc *rd;
int nob;
int n;
int i;
rd = msg->ibm_type == IBLND_MSG_GET_REQ ?
&msg->ibm_u.get.ibgm_rd :
&msg->ibm_u.putack.ibpam_rd;
if (flip) {
__swab32s(&rd->rd_key);
__swab32s(&rd->rd_nfrags);
}
n = rd->rd_nfrags;
if (n <= 0 || n > IBLND_MAX_RDMA_FRAGS) {
CERROR("Bad nfrags: %d, should be 0 < n <= %d\n",
n, IBLND_MAX_RDMA_FRAGS);
return 1;
}
nob = offsetof(struct kib_msg, ibm_u) +
kiblnd_rd_msg_size(rd, msg->ibm_type, n);
if (msg->ibm_nob < nob) {
CERROR("Short %s: %d(%d)\n",
kiblnd_msgtype2str(msg->ibm_type), msg->ibm_nob, nob);
return 1;
}
if (!flip)
return 0;
for (i = 0; i < n; i++) {
__swab32s(&rd->rd_frags[i].rf_nob);
__swab64s(&rd->rd_frags[i].rf_addr);
}
return 0;
}
void kiblnd_pack_msg(struct lnet_ni *ni, struct kib_msg *msg, int version,
int credits, struct lnet_nid *dstnid, u64 dststamp)
{
struct kib_net *net = ni->ni_data;
/* CAVEAT EMPTOR! all message fields not set here should have been
* initialised previously.
*/
msg->ibm_magic = IBLND_MSG_MAGIC;
msg->ibm_version = version;
/* ibm_type */
msg->ibm_credits = credits;
/* ibm_nob */
msg->ibm_cksum = 0;
msg->ibm_srcnid = lnet_nid_to_nid4(&ni->ni_nid);
msg->ibm_srcstamp = net->ibn_incarnation;
msg->ibm_dstnid = lnet_nid_to_nid4(dstnid);
msg->ibm_dststamp = dststamp;
if (*kiblnd_tunables.kib_cksum) {
/* NB ibm_cksum zero while computing cksum */
msg->ibm_cksum = kiblnd_cksum(msg, msg->ibm_nob);
}
}
int kiblnd_unpack_msg(struct kib_msg *msg, int nob)
{
const int hdr_size = offsetof(struct kib_msg, ibm_u);
__u32 msg_cksum;
__u16 version;
int msg_nob;
bool flip;
/* 6 bytes are enough to have received magic + version */
if (nob < 6) {
CERROR("Short message: %d\n", nob);
return -EPROTO;
}
if (msg->ibm_magic == IBLND_MSG_MAGIC) {
flip = false;
} else if (msg->ibm_magic == __swab32(IBLND_MSG_MAGIC)) {
flip = true;
} else {
CERROR("Bad magic: %08x\n", msg->ibm_magic);
return -EPROTO;
}
version = flip ? __swab16(msg->ibm_version) : msg->ibm_version;
if (version != IBLND_MSG_VERSION &&
version != IBLND_MSG_VERSION_1) {
CERROR("Bad version: %x\n", version);
return -EPROTO;
}
if (nob < hdr_size) {
CERROR("Short message: %d\n", nob);
return -EPROTO;
}
msg_nob = flip ? __swab32(msg->ibm_nob) : msg->ibm_nob;
if (msg_nob > nob) {
CERROR("Short message: got %d, wanted %d\n", nob, msg_nob);
return -EPROTO;
}
/* checksum must be computed with ibm_cksum zero and BEFORE anything
* gets flipped
*/
msg_cksum = flip ? __swab32(msg->ibm_cksum) : msg->ibm_cksum;
msg->ibm_cksum = 0;
if (msg_cksum != 0 &&
msg_cksum != kiblnd_cksum(msg, msg_nob)) {
CERROR("Bad checksum\n");
return -EPROTO;
}
msg->ibm_cksum = msg_cksum;
if (flip) {
/* leave magic unflipped as a clue to peer_ni endianness */
msg->ibm_version = version;
BUILD_BUG_ON(sizeof(msg->ibm_type) != 1);
BUILD_BUG_ON(sizeof(msg->ibm_credits) != 1);
msg->ibm_nob = msg_nob;
__swab64s(&msg->ibm_srcnid);
__swab64s(&msg->ibm_srcstamp);
__swab64s(&msg->ibm_dstnid);
__swab64s(&msg->ibm_dststamp);
}
if (msg->ibm_srcnid == LNET_NID_ANY) {
CERROR("Bad src nid: %s\n", libcfs_nid2str(msg->ibm_srcnid));
return -EPROTO;
}
if (msg_nob < kiblnd_msgtype2size(msg->ibm_type)) {
CERROR("Short %s: %d(%d)\n", kiblnd_msgtype2str(msg->ibm_type),
msg_nob, kiblnd_msgtype2size(msg->ibm_type));
return -EPROTO;
}
switch (msg->ibm_type) {
default:
CERROR("Unknown message type %x\n", msg->ibm_type);
return -EPROTO;
case IBLND_MSG_NOOP:
case IBLND_MSG_IMMEDIATE:
case IBLND_MSG_PUT_REQ:
break;
case IBLND_MSG_PUT_ACK:
case IBLND_MSG_GET_REQ:
if (kiblnd_unpack_rd(msg, flip))
return -EPROTO;
break;
case IBLND_MSG_PUT_NAK:
case IBLND_MSG_PUT_DONE:
case IBLND_MSG_GET_DONE:
if (flip)
__swab32s(&msg->ibm_u.completion.ibcm_status);
break;
case IBLND_MSG_CONNREQ:
case IBLND_MSG_CONNACK:
if (flip) {
__swab16s(&msg->ibm_u.connparams.ibcp_queue_depth);
__swab16s(&msg->ibm_u.connparams.ibcp_max_frags);
__swab32s(&msg->ibm_u.connparams.ibcp_max_msg_size);
}
break;
}
return 0;
}
int
kiblnd_create_peer(struct lnet_ni *ni, struct kib_peer_ni **peerp,
struct lnet_nid *nid)
{
struct kib_peer_ni *peer_ni;
struct kib_net *net = ni->ni_data;
int cpt = lnet_nid2cpt(nid, ni);
unsigned long flags;
LASSERT(net);
LASSERT(!LNET_NID_IS_ANY(nid));
LIBCFS_CPT_ALLOC(peer_ni, lnet_cpt_table(), cpt, sizeof(*peer_ni));
if (!peer_ni) {
CERROR("Cannot allocate peer_ni\n");
return -ENOMEM;
}
peer_ni->ibp_ni = ni;
peer_ni->ibp_nid = *nid;
peer_ni->ibp_error = 0;
peer_ni->ibp_last_alive = 0;
peer_ni->ibp_max_frags = IBLND_MAX_RDMA_FRAGS;
peer_ni->ibp_queue_depth = ni->ni_net->net_tunables.lct_peer_tx_credits;
peer_ni->ibp_queue_depth_mod = 0; /* try to use the default */
kref_init(&peer_ni->ibp_kref);
atomic_set(&peer_ni->ibp_nconns, 0);
INIT_HLIST_NODE(&peer_ni->ibp_list);
INIT_LIST_HEAD(&peer_ni->ibp_conns);
INIT_LIST_HEAD(&peer_ni->ibp_connreqs);
INIT_LIST_HEAD(&peer_ni->ibp_tx_queue);
write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
/* always called with a ref on ni, which prevents ni being shutdown */
LASSERT(net->ibn_shutdown == 0);
/* npeers only grows with the global lock held */
atomic_inc(&net->ibn_npeers);
write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
*peerp = peer_ni;
return 0;
}
void
kiblnd_destroy_peer(struct kref *kref)
{
struct kib_peer_ni *peer_ni = container_of(kref, struct kib_peer_ni,
ibp_kref);
struct kib_net *net = peer_ni->ibp_ni->ni_data;
LASSERT(net != NULL);
LASSERT(!kiblnd_peer_active(peer_ni));
LASSERT(kiblnd_peer_idle(peer_ni));
LASSERT(list_empty(&peer_ni->ibp_tx_queue));
LIBCFS_FREE(peer_ni, sizeof(*peer_ni));
/* NB a peer_ni's connections keep a reference on their peer_ni until
* they are destroyed, so we can be assured that _all_ state to do
* with this peer_ni has been cleaned up when its refcount drops to
* zero.
*/
if (atomic_dec_and_test(&net->ibn_npeers))
wake_up_var(&net->ibn_npeers);
}
struct kib_peer_ni *
kiblnd_find_peer_locked(struct lnet_ni *ni, struct lnet_nid *nid)
{
/* the caller is responsible for accounting the additional reference
* that this creates
*/
unsigned long hash = nidhash(nid);
struct kib_peer_ni *peer_ni;
hash_for_each_possible(kiblnd_data.kib_peers, peer_ni,
ibp_list, hash) {
LASSERT(!kiblnd_peer_idle(peer_ni));
/* Match a peer if its NID and the NID of the local NI it
* communicates over are the same. Otherwise don't match
* the peer, which will result in a new lnd peer being
* created.
*/
if (!nid_same(&peer_ni->ibp_nid, nid) ||
!nid_same(&peer_ni->ibp_ni->ni_nid, &ni->ni_nid))
continue;
CDEBUG(D_NET, "got peer_ni [%p] -> %s (%d) version: %x\n",
peer_ni, libcfs_nidstr(nid),
kref_read(&peer_ni->ibp_kref),
peer_ni->ibp_version);
return peer_ni;
}
return NULL;
}
void
kiblnd_unlink_peer_locked(struct kib_peer_ni *peer_ni)
{
LASSERT(list_empty(&peer_ni->ibp_conns));
LASSERT(kiblnd_peer_active(peer_ni));
hlist_del_init(&peer_ni->ibp_list);
/* lose peerlist's ref */
kiblnd_peer_decref(peer_ni);
}
static void
kiblnd_debug_rx(struct kib_rx *rx)
{
CDEBUG(D_CONSOLE, " %p msg_type %x cred %d\n",
rx, rx->rx_msg->ibm_type,
rx->rx_msg->ibm_credits);
}
static void
kiblnd_debug_tx(struct kib_tx *tx)
{
CDEBUG(D_CONSOLE,
" %p snd %d q %d w %d rc %d dl %lld cookie %#llx msg %s%s type %x cred %d\n",
tx, tx->tx_sending, tx->tx_queued, tx->tx_waiting,
tx->tx_status, ktime_to_ns(tx->tx_deadline), tx->tx_cookie,
tx->tx_lntmsg[0] == NULL ? "-" : "!",
tx->tx_lntmsg[1] == NULL ? "-" : "!",
tx->tx_msg->ibm_type, tx->tx_msg->ibm_credits);
}
static void
kiblnd_debug_conn(struct kib_conn *conn)
{
struct list_head *tmp;
int i;
spin_lock(&conn->ibc_lock);
CDEBUG(D_CONSOLE, "conn[%d] %p [version %x] -> %s:\n",
atomic_read(&conn->ibc_refcount), conn,
conn->ibc_version, libcfs_nidstr(&conn->ibc_peer->ibp_nid));
CDEBUG(D_CONSOLE,
" state %d nposted %d/%d cred %d o_cred %d r_cred %d\n",
conn->ibc_state, conn->ibc_noops_posted,
conn->ibc_nsends_posted, conn->ibc_credits,
conn->ibc_outstanding_credits, conn->ibc_reserved_credits);
CDEBUG(D_CONSOLE, " comms_err %d\n", conn->ibc_comms_error);
CDEBUG(D_CONSOLE, " early_rxs:\n");
list_for_each(tmp, &conn->ibc_early_rxs)
kiblnd_debug_rx(list_entry(tmp, struct kib_rx, rx_list));
CDEBUG(D_CONSOLE, " tx_noops:\n");
list_for_each(tmp, &conn->ibc_tx_noops)
kiblnd_debug_tx(list_entry(tmp, struct kib_tx, tx_list));
CDEBUG(D_CONSOLE, " tx_queue_nocred:\n");
list_for_each(tmp, &conn->ibc_tx_queue_nocred)
kiblnd_debug_tx(list_entry(tmp, struct kib_tx, tx_list));
CDEBUG(D_CONSOLE, " tx_queue_rsrvd:\n");
list_for_each(tmp, &conn->ibc_tx_queue_rsrvd)
kiblnd_debug_tx(list_entry(tmp, struct kib_tx, tx_list));
CDEBUG(D_CONSOLE, " tx_queue:\n");
list_for_each(tmp, &conn->ibc_tx_queue)
kiblnd_debug_tx(list_entry(tmp, struct kib_tx, tx_list));
CDEBUG(D_CONSOLE, " active_txs:\n");
list_for_each(tmp, &conn->ibc_active_txs)
kiblnd_debug_tx(list_entry(tmp, struct kib_tx, tx_list));
CDEBUG(D_CONSOLE, " rxs:\n");
for (i = 0; i < IBLND_RX_MSGS(conn); i++)
kiblnd_debug_rx(&conn->ibc_rxs[i]);
spin_unlock(&conn->ibc_lock);
}
static void
kiblnd_dump_peer_debug_info(struct kib_peer_ni *peer_ni)
{
struct kib_conn *conn;
struct kib_conn *cnxt;
int count = 0;
CDEBUG(D_CONSOLE, "[last_alive, races, reconnected, error]: %lld, %d, %d, %d\n",
peer_ni->ibp_last_alive,
peer_ni->ibp_races,
peer_ni->ibp_reconnected,
peer_ni->ibp_error);
list_for_each_entry_safe(conn, cnxt, &peer_ni->ibp_conns,
ibc_list) {
CDEBUG(D_CONSOLE, "Conn %d:\n", count);
kiblnd_debug_conn(conn);
count++;
}
}
static int
kiblnd_get_peer_info(struct lnet_ni *ni, struct lnet_nid *nid, int index,
struct lnet_nid *nidp, int *count)
{
struct kib_peer_ni *peer_ni;
int i;
unsigned long flags;
read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
hash_for_each(kiblnd_data.kib_peers, i, peer_ni, ibp_list) {
LASSERT(!kiblnd_peer_idle(peer_ni));
if (peer_ni->ibp_ni != ni)
continue;
if (nid_same(&peer_ni->ibp_nid, nid))
kiblnd_dump_peer_debug_info(peer_ni);
if (index-- > 0)
continue;
*nidp = peer_ni->ibp_nid;
*count = kref_read(&peer_ni->ibp_kref);
read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
return 0;
}
read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
return -ENOENT;
}
static void
kiblnd_del_peer_locked(struct kib_peer_ni *peer_ni)
{
struct kib_conn *cnxt;
struct kib_conn *conn;
if (list_empty(&peer_ni->ibp_conns)) {
kiblnd_unlink_peer_locked(peer_ni);
} else {
list_for_each_entry_safe(conn, cnxt, &peer_ni->ibp_conns,
ibc_list)
kiblnd_close_conn_locked(conn, 0);
/* NB closing peer_ni's last conn unlinked it. */
}
/* NB peer_ni now unlinked; might even be freed if the peer_ni table
* had the last ref on it.
*/
}
static int
kiblnd_del_peer(struct lnet_ni *ni, struct lnet_nid *nid)
{
LIST_HEAD(zombies);
struct hlist_node *pnxt;
struct kib_peer_ni *peer_ni;
int lo;
int hi;
int i;
unsigned long flags;
int rc = -ENOENT;
write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
if (!LNET_NID_IS_ANY(nid)) {
lo = hash_min(nidhash(nid),
HASH_BITS(kiblnd_data.kib_peers));
hi = lo;
} else {
lo = 0;
hi = HASH_SIZE(kiblnd_data.kib_peers) - 1;
}
for (i = lo; i <= hi; i++) {
hlist_for_each_entry_safe(peer_ni, pnxt,
&kiblnd_data.kib_peers[i], ibp_list) {
LASSERT(!kiblnd_peer_idle(peer_ni));
if (peer_ni->ibp_ni != ni)
continue;
if (!(LNET_NID_IS_ANY(nid) ||
nid_same(&peer_ni->ibp_nid, nid)))
continue;
if (!list_empty(&peer_ni->ibp_tx_queue)) {
LASSERT(list_empty(&peer_ni->ibp_conns));
list_splice_init(&peer_ni->ibp_tx_queue,
&zombies);
}
kiblnd_del_peer_locked(peer_ni);
rc = 0; /* matched something */
}
}
write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
kiblnd_txlist_done(&zombies, -EIO, LNET_MSG_STATUS_LOCAL_ERROR);
return rc;
}
static struct kib_conn *
kiblnd_get_conn_by_idx(struct lnet_ni *ni, int index)
{
struct kib_peer_ni *peer_ni;
struct kib_conn *conn;
int i;
unsigned long flags;
read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
hash_for_each(kiblnd_data.kib_peers, i, peer_ni, ibp_list) {
LASSERT(!kiblnd_peer_idle(peer_ni));
if (peer_ni->ibp_ni != ni)
continue;
list_for_each_entry(conn, &peer_ni->ibp_conns,
ibc_list) {
if (index-- > 0)
continue;
kiblnd_conn_addref(conn);
read_unlock_irqrestore(&kiblnd_data.kib_global_lock,
flags);
return conn;
}
}
read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
return NULL;
}
static void
kiblnd_setup_mtu_locked(struct rdma_cm_id *cmid)
{
/* XXX There is no path record for iWARP, set by netdev->change_mtu? */
if (cmid->route.path_rec == NULL)
return;
if (*kiblnd_tunables.kib_ib_mtu)
cmid->route.path_rec->mtu =
ib_mtu_int_to_enum(*kiblnd_tunables.kib_ib_mtu);
}
static int
kiblnd_get_completion_vector(struct kib_conn *conn, int cpt)
{
unsigned long hash = nidhash(&conn->ibc_peer->ibp_nid);
cpumask_var_t *mask;
int vectors;
int off;
int i;
vectors = conn->ibc_cmid->device->num_comp_vectors;
if (vectors <= 1)
return 0;
mask = cfs_cpt_cpumask(lnet_cpt_table(), cpt);
/* hash NID to CPU id in this partition... when targeting a single peer
* with multiple QPs, to engage more cores in CQ processing to a single
* peer, use ibp_nconns to salt the value the comp_vector value
*/
hash += atomic_read(&conn->ibc_peer->ibp_nconns);
off = do_div(hash, cpumask_weight(*mask));
for_each_cpu(i, *mask) {
if (off-- == 0)
return i % vectors;
}
LBUG();
return 1;
}
/* Get the scheduler bound to this CPT. If the scheduler has no
* threads, which means that the CPT has no CPUs, then grab the
* next scheduler that we can use.
*
* This case would be triggered if a NUMA node is configured with
* no associated CPUs.
*/
static struct kib_sched_info *
kiblnd_get_scheduler(int cpt)
{
struct kib_sched_info *sched;
int i;
sched = kiblnd_data.kib_scheds[cpt];
if (sched->ibs_nthreads > 0)
return sched;
cfs_percpt_for_each(sched, i, kiblnd_data.kib_scheds) {
if (sched->ibs_nthreads > 0) {
CDEBUG(D_NET, "scheduler[%d] has no threads. selected scheduler[%d]\n",
cpt, sched->ibs_cpt);
return sched;
}
}
return NULL;
}
static unsigned int kiblnd_send_wrs(struct kib_conn *conn)
{
/* One WR for the LNet message
* And ibc_max_frags for the transfer WRs
*/
int ret;
int multiplier = 1 + conn->ibc_max_frags;
/* FastReg needs two extra WRs for map and invalidate */
if (IS_FAST_REG_DEV(conn->ibc_hdev->ibh_dev))
multiplier += 2;
/* account for a maximum of ibc_queue_depth in-flight transfers */
ret = multiplier * conn->ibc_queue_depth;
if (ret > conn->ibc_hdev->ibh_max_qp_wr) {
CDEBUG(D_NET,
"peer_credits %u will result in send work request size %d larger than maximum %d device can handle\n",
conn->ibc_queue_depth, ret,
conn->ibc_hdev->ibh_max_qp_wr);
conn->ibc_queue_depth =
conn->ibc_hdev->ibh_max_qp_wr / multiplier;
}
/* don't go beyond the maximum the device can handle */
return min(ret, conn->ibc_hdev->ibh_max_qp_wr);
}
struct kib_conn *
kiblnd_create_conn(struct kib_peer_ni *peer_ni, struct rdma_cm_id *cmid,
int state, int version)
{
/* CAVEAT EMPTOR:
* If the new conn is created successfully it takes over the caller's
* ref on 'peer_ni'. It also "owns" 'cmid' and destroys it when it itself
* is destroyed. On failure, the caller's ref on 'peer_ni' remains and
* she must dispose of 'cmid'. (Actually I'd block forever if I tried
* to destroy 'cmid' here since I'm called from the CM which still has
* its ref on 'cmid').
*/
rwlock_t *glock = &kiblnd_data.kib_global_lock;
struct kib_net *net = peer_ni->ibp_ni->ni_data;
struct kib_dev *dev;
struct ib_qp_init_attr init_qp_attr = {};
struct kib_sched_info *sched;
struct ib_cq_init_attr cq_attr = {};
struct kib_conn *conn;
struct ib_cq *cq;
unsigned long flags;
int cpt;
int rc;
int i;
LASSERT(net != NULL);
LASSERT(!in_interrupt());
dev = net->ibn_dev;
cpt = lnet_nid2cpt(&peer_ni->ibp_nid, peer_ni->ibp_ni);
sched = kiblnd_get_scheduler(cpt);
if (!sched) {
CERROR("no schedulers available. node is unhealthy\n");
goto failed_0;
}
/* The cpt might have changed if we ended up selecting a non cpt
* native scheduler. So use the scheduler's cpt instead.
*/
cpt = sched->ibs_cpt;
LIBCFS_CPT_ALLOC(conn, lnet_cpt_table(), cpt, sizeof(*conn));
if (conn == NULL) {
CERROR("Can't allocate connection for %s\n",
libcfs_nidstr(&peer_ni->ibp_nid));
goto failed_0;
}
conn->ibc_state = IBLND_CONN_INIT;
conn->ibc_version = version;
conn->ibc_peer = peer_ni; /* I take the caller's ref */
cmid->context = conn; /* for future CM callbacks */
conn->ibc_cmid = cmid;
conn->ibc_max_frags = peer_ni->ibp_max_frags;
conn->ibc_queue_depth = peer_ni->ibp_queue_depth;
conn->ibc_rxs = NULL;
conn->ibc_rx_pages = NULL;
INIT_LIST_HEAD(&conn->ibc_list);
INIT_LIST_HEAD(&conn->ibc_connd_list);
INIT_LIST_HEAD(&conn->ibc_early_rxs);
INIT_LIST_HEAD(&conn->ibc_tx_noops);
INIT_LIST_HEAD(&conn->ibc_tx_queue);
INIT_LIST_HEAD(&conn->ibc_tx_queue_rsrvd);
INIT_LIST_HEAD(&conn->ibc_tx_queue_nocred);
INIT_LIST_HEAD(&conn->ibc_active_txs);
INIT_LIST_HEAD(&conn->ibc_zombie_txs);
spin_lock_init(&conn->ibc_lock);
LIBCFS_CPT_ALLOC(conn->ibc_connvars, lnet_cpt_table(), cpt,
sizeof(*conn->ibc_connvars));
if (conn->ibc_connvars == NULL) {
CERROR("Can't allocate in-progress connection state\n");
goto failed_2;
}
write_lock_irqsave(glock, flags);
if (dev->ibd_failover) {
write_unlock_irqrestore(glock, flags);
CERROR("%s: failover in progress\n", dev->ibd_ifname);
goto failed_2;
}
if (dev->ibd_hdev->ibh_ibdev != cmid->device) {
/* wakeup failover thread and teardown connection */
if (kiblnd_dev_can_failover(dev)) {
list_add_tail(&dev->ibd_fail_list,
&kiblnd_data.kib_failed_devs);
wake_up(&kiblnd_data.kib_failover_waitq);
}
write_unlock_irqrestore(glock, flags);
CERROR("cmid HCA(%s), kib_dev(%s) need failover\n",
cmid->device->name, dev->ibd_ifname);
goto failed_2;
}
kiblnd_hdev_addref_locked(dev->ibd_hdev);
conn->ibc_hdev = dev->ibd_hdev;
kiblnd_setup_mtu_locked(cmid);
write_unlock_irqrestore(glock, flags);
cq_attr.cqe = IBLND_CQ_ENTRIES(conn);
cq_attr.comp_vector = kiblnd_get_completion_vector(conn, cpt);
cq = ib_create_cq(cmid->device,
kiblnd_cq_completion, kiblnd_cq_event, conn,
&cq_attr);
if (IS_ERR(cq)) {
/* on MLX-5 (possibly MLX-4 as well) this error could be
* hit if the concurrent_sends and/or peer_tx_credits is set
* too high. Or due to an MLX-5 bug which tries to
* allocate 256kb via kmalloc for WR cookie array
*/
CERROR("Failed to create CQ with %d CQEs: %ld\n",
IBLND_CQ_ENTRIES(conn), PTR_ERR(cq));
goto failed_2;
}
conn->ibc_cq = cq;
rc = ib_req_notify_cq(cq, IB_CQ_NEXT_COMP);
if (rc != 0) {
CERROR("Can't request completion notification: %d\n", rc);
goto failed_2;
}
init_qp_attr.event_handler = kiblnd_qp_event;
init_qp_attr.qp_context = conn;
init_qp_attr.cap.max_send_sge = *kiblnd_tunables.kib_wrq_sge;
init_qp_attr.cap.max_recv_sge = 1;
init_qp_attr.sq_sig_type = IB_SIGNAL_REQ_WR;
init_qp_attr.qp_type = IB_QPT_RC;
init_qp_attr.send_cq = cq;
init_qp_attr.recv_cq = cq;
if (peer_ni->ibp_queue_depth_mod &&
peer_ni->ibp_queue_depth_mod < peer_ni->ibp_queue_depth) {
conn->ibc_queue_depth = peer_ni->ibp_queue_depth_mod;
CDEBUG(D_NET, "Use reduced queue depth %u (from %u)\n",
peer_ni->ibp_queue_depth_mod,
peer_ni->ibp_queue_depth);
}
do {
/* kiblnd_send_wrs() can change the connection's queue depth if
* the maximum work requests for the device is maxed out
*/
init_qp_attr.cap.max_send_wr = kiblnd_send_wrs(conn);
init_qp_attr.cap.max_recv_wr = IBLND_RECV_WRS(conn);
rc = rdma_create_qp(cmid, conn->ibc_hdev->ibh_pd,
&init_qp_attr);
if (rc != -ENOMEM || conn->ibc_queue_depth < 2)
break;
conn->ibc_queue_depth--;
} while (rc);
if (rc) {
CERROR("Can't create QP: %d, send_wr: %d, recv_wr: %d, send_sge: %d, recv_sge: %d\n",
rc, init_qp_attr.cap.max_send_wr,
init_qp_attr.cap.max_recv_wr,
init_qp_attr.cap.max_send_sge,
init_qp_attr.cap.max_recv_sge);
goto failed_2;
}
conn->ibc_sched = sched;
if (!peer_ni->ibp_queue_depth_mod &&
conn->ibc_queue_depth != peer_ni->ibp_queue_depth) {
CWARN("peer %s - queue depth reduced from %u to %u to allow for qp creation\n",
libcfs_nidstr(&peer_ni->ibp_nid),
peer_ni->ibp_queue_depth,
conn->ibc_queue_depth);
peer_ni->ibp_queue_depth_mod = conn->ibc_queue_depth;
}
LIBCFS_CPT_ALLOC(conn->ibc_rxs, lnet_cpt_table(), cpt,
IBLND_RX_MSGS(conn) * sizeof(struct kib_rx));
if (conn->ibc_rxs == NULL) {
CERROR("Cannot allocate RX buffers\n");
goto failed_2;
}
rc = kiblnd_alloc_pages(&conn->ibc_rx_pages, cpt,
IBLND_RX_MSG_PAGES(conn));
if (rc != 0)
goto failed_2;
kiblnd_map_rx_descs(conn);
/* 1 ref for caller and each rxmsg */
atomic_set(&conn->ibc_refcount, 1 + IBLND_RX_MSGS(conn));
conn->ibc_nrx = IBLND_RX_MSGS(conn);
/* post receives */
for (i = 0; i < IBLND_RX_MSGS(conn); i++) {
rc = kiblnd_post_rx(&conn->ibc_rxs[i], IBLND_POSTRX_NO_CREDIT);
if (rc != 0) {
CERROR("Can't post rxmsg: %d\n", rc);
/* Make posted receives complete */
kiblnd_abort_receives(conn);
/* correct # of posted buffers
* NB locking needed now I'm racing with completion
*/
spin_lock_irqsave(&sched->ibs_lock, flags);
conn->ibc_nrx -= IBLND_RX_MSGS(conn) - i;
spin_unlock_irqrestore(&sched->ibs_lock, flags);
/* cmid will be destroyed by CM(ofed) after cm_callback
* returned, so we can't refer it anymore
* (by kiblnd_connd()->kiblnd_destroy_conn)
*/
rdma_destroy_qp(conn->ibc_cmid);
conn->ibc_cmid = NULL;
/* Drop my own and unused rxbuffer refcounts */
while (i++ <= IBLND_RX_MSGS(conn))
kiblnd_conn_decref(conn);
return NULL;
}
}
/* Init successful! */
LASSERT(state == IBLND_CONN_ACTIVE_CONNECT ||
state == IBLND_CONN_PASSIVE_WAIT);
conn->ibc_state = state;
/* 1 more conn */
atomic_inc(&peer_ni->ibp_nconns);
atomic_inc(&net->ibn_nconns);
return conn;
failed_2:
kiblnd_destroy_conn(conn);
LIBCFS_FREE(conn, sizeof(*conn));
failed_0:
return NULL;
}
void
kiblnd_destroy_conn(struct kib_conn *conn)
{
struct rdma_cm_id *cmid = conn->ibc_cmid;
struct kib_peer_ni *peer_ni = conn->ibc_peer;
LASSERT(!in_interrupt());
LASSERT(atomic_read(&conn->ibc_refcount) == 0);
LASSERT(list_empty(&conn->ibc_early_rxs));
LASSERT(list_empty(&conn->ibc_tx_noops));
LASSERT(list_empty(&conn->ibc_tx_queue));
LASSERT(list_empty(&conn->ibc_tx_queue_rsrvd));
LASSERT(list_empty(&conn->ibc_tx_queue_nocred));
LASSERT(list_empty(&conn->ibc_active_txs));
LASSERT(conn->ibc_noops_posted == 0);
LASSERT(conn->ibc_nsends_posted == 0);
switch (conn->ibc_state) {
default:
/* conn must be completely disengaged from the network */
LBUG();
case IBLND_CONN_DISCONNECTED:
/* connvars should have been freed already */
LASSERT(conn->ibc_connvars == NULL);
break;
case IBLND_CONN_INIT:
break;
}
/* conn->ibc_cmid might be destroyed by CM already */
if (cmid != NULL && cmid->qp != NULL)
rdma_destroy_qp(cmid);
if (conn->ibc_cq)
ib_destroy_cq(conn->ibc_cq);
kiblnd_txlist_done(&conn->ibc_zombie_txs, -ECONNABORTED,
LNET_MSG_STATUS_OK);
if (conn->ibc_rx_pages != NULL)
kiblnd_unmap_rx_descs(conn);
CFS_FREE_PTR_ARRAY(conn->ibc_rxs, IBLND_RX_MSGS(conn));
LIBCFS_FREE(conn->ibc_connvars, sizeof(*conn->ibc_connvars));
if (conn->ibc_hdev != NULL)
kiblnd_hdev_decref(conn->ibc_hdev);
/* See CAVEAT EMPTOR above in kiblnd_create_conn */
if (conn->ibc_state != IBLND_CONN_INIT) {
struct kib_net *net = peer_ni->ibp_ni->ni_data;
atomic_dec(&peer_ni->ibp_nconns);
atomic_dec(&net->ibn_nconns);
kiblnd_peer_decref(peer_ni);
rdma_destroy_id(cmid);
}
}
int
kiblnd_close_peer_conns_locked(struct kib_peer_ni *peer_ni, int why)
{
struct kib_conn *conn;
struct kib_conn *cnxt;
int count = 0;
list_for_each_entry_safe(conn, cnxt, &peer_ni->ibp_conns,
ibc_list) {
CDEBUG(D_NET,
"Closing conn -> %s, version: %x, reason: %d\n",
libcfs_nidstr(&peer_ni->ibp_nid),
conn->ibc_version, why);
kiblnd_close_conn_locked(conn, why);
count++;
}
return count;
}
int
kiblnd_close_stale_conns_locked(struct kib_peer_ni *peer_ni,
int version, __u64 incarnation)
{
struct kib_conn *conn;
struct kib_conn *cnxt;
int count = 0;
list_for_each_entry_safe(conn, cnxt, &peer_ni->ibp_conns,
ibc_list) {
if (conn->ibc_version == version &&
conn->ibc_incarnation == incarnation)
continue;
CDEBUG(D_NET,
"Closing stale conn -> %s version: %x, incarnation:%#llx(%x, %#llx)\n",
libcfs_nidstr(&peer_ni->ibp_nid),
conn->ibc_version, conn->ibc_incarnation,
version, incarnation);
kiblnd_close_conn_locked(conn, -ESTALE);
count++;
}
return count;
}
static int
kiblnd_close_matching_conns(struct lnet_ni *ni, struct lnet_nid *nid)
{
struct kib_peer_ni *peer_ni;
struct hlist_node *pnxt;
int lo;
int hi;
int i;
unsigned long flags;
int count = 0;
write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
if (LNET_NID_IS_ANY(nid)) {
lo = hash_min(nidhash(nid),
HASH_BITS(kiblnd_data.kib_peers));
hi = lo;
} else {
lo = 0;
hi = HASH_SIZE(kiblnd_data.kib_peers) - 1;
}
for (i = lo; i <= hi; i++) {
hlist_for_each_entry_safe(peer_ni, pnxt,
&kiblnd_data.kib_peers[i], ibp_list) {
LASSERT(!kiblnd_peer_idle(peer_ni));
if (peer_ni->ibp_ni != ni)
continue;
if (!(LNET_NID_IS_ANY(nid) ||
nid_same(nid, &peer_ni->ibp_nid)))
continue;
count += kiblnd_close_peer_conns_locked(peer_ni, 0);
}
}
write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
/* wildcards always succeed */
if (LNET_NID_IS_ANY(nid))
return 0;
return (count == 0) ? -ENOENT : 0;
}
static int
kiblnd_ctl(struct lnet_ni *ni, unsigned int cmd, void *arg)
{
struct libcfs_ioctl_data *data = arg;
struct lnet_nid nid;
int rc = -EINVAL;
switch (cmd) {
case IOC_LIBCFS_GET_PEER: {
struct lnet_nid user_nid;
int count = 0;
lnet_nid4_to_nid(data->ioc_nid, &user_nid);
rc = kiblnd_get_peer_info(ni, &user_nid, data->ioc_count,
&nid, &count);
data->ioc_nid = lnet_nid_to_nid4(&nid);
data->ioc_count = count;
break;
}
case IOC_LIBCFS_DEL_PEER:
lnet_nid4_to_nid(data->ioc_nid, &nid);
rc = kiblnd_del_peer(ni, &nid);
break;
case IOC_LIBCFS_GET_CONN: {
struct kib_conn *conn;
rc = 0;
conn = kiblnd_get_conn_by_idx(ni, data->ioc_count);
if (conn == NULL) {
rc = -ENOENT;
break;
}
LASSERT(conn->ibc_cmid);
if (!nid_is_nid4(&conn->ibc_peer->ibp_nid))
return -EINVAL;
data->ioc_nid = lnet_nid_to_nid4(&conn->ibc_peer->ibp_nid);
if (conn->ibc_cmid->route.path_rec == NULL)
data->ioc_u32[0] = 0; /* iWarp has no path MTU */
else
data->ioc_u32[0] =
ib_mtu_enum_to_int(conn->ibc_cmid->route.path_rec->mtu);
kiblnd_conn_decref(conn);
break;
}
case IOC_LIBCFS_CLOSE_CONNECTION:
lnet_nid4_to_nid(data->ioc_nid, &nid);
rc = kiblnd_close_matching_conns(ni, &nid);
break;
default:
break;
}
return rc;
}
static int
kiblnd_tun_defaults(struct lnet_lnd_tunables *tunables,
struct lnet_ioctl_config_lnd_cmn_tunables *cmn)
{
int rc;
/* sync to latest module settings */
rc = kiblnd_tunables_setup(tunables, cmn);
if (rc < 0)
return 0;
memcpy(&tunables->lnd_tun_u.lnd_o2ib, &kib_default_tunables,
sizeof(kib_default_tunables));
return rc;
}
static const struct ln_key_list kiblnd_tunables_keys = {
.lkl_maxattr = LNET_NET_O2IBLND_TUNABLES_ATTR_MAX,
.lkl_list = {
[LNET_NET_O2IBLND_TUNABLES_ATTR_HIW_PEER_CREDITS] = {
.lkp_value = "peercredits_hiw",
.lkp_data_type = NLA_U32
},
[LNET_NET_O2IBLND_TUNABLES_ATTR_MAP_ON_DEMAND] = {
.lkp_value = "map_on_demand",
.lkp_data_type = NLA_FLAG
},
[LNET_NET_O2IBLND_TUNABLES_ATTR_CONCURRENT_SENDS] = {
.lkp_value = "concurrent_sends",
.lkp_data_type = NLA_U32
},
[LNET_NET_O2IBLND_TUNABLES_ATTR_FMR_POOL_SIZE] = {
.lkp_value = "fmr_pool_size",
.lkp_data_type = NLA_U32
},
[LNET_NET_O2IBLND_TUNABLES_ATTR_FMR_FLUSH_TRIGGER] = {
.lkp_value = "fmr_flush_trigger",
.lkp_data_type = NLA_U32
},
[LNET_NET_O2IBLND_TUNABLES_ATTR_FMR_CACHE] = {
.lkp_value = "fmr_cache",
.lkp_data_type = NLA_U32
},
[LNET_NET_O2IBLND_TUNABLES_ATTR_NTX] = {
.lkp_value = "ntx",
.lkp_data_type = NLA_U16
},
[LNET_NET_O2IBLND_TUNABLES_ATTR_CONNS_PER_PEER] = {
.lkp_value = "conns_per_peer",
.lkp_data_type = NLA_U16
},
[LNET_NET_O2IBLND_TUNABLES_ATTR_LND_TIMEOUT] = {
.lkp_value = "timeout",
.lkp_data_type = NLA_U32,
},
[LNET_NET_O2IBLND_TUNABLES_ATTR_LND_TOS] = {
.lkp_value = "tos",
.lkp_data_type = NLA_S16,
},
},
};
static int
kiblnd_nl_get(int cmd, struct sk_buff *msg, int type, void *data,
bool export_backup)
{
struct lnet_ioctl_config_o2iblnd_tunables *tuns;
struct lnet_ni *ni = data;
if (!ni || !msg)
return -EINVAL;
if (cmd != LNET_CMD_NETS || type != LNET_NET_LOCAL_NI_ATTR_LND_TUNABLES)
return -EOPNOTSUPP;
tuns = &ni->ni_lnd_tunables.lnd_tun_u.lnd_o2ib;
nla_put_u32(msg, LNET_NET_O2IBLND_TUNABLES_ATTR_HIW_PEER_CREDITS,
tuns->lnd_peercredits_hiw);
/* Map on demand is obsolete and should always be set to 1.
* Always report to user the default setting of 1 (True). If
* the user updates their config file on modern systems the
* correct default behavior will replace whatever the users
* selection was previously. Eventually we can even remove
* map_on_demand completely once all systems are using the
* Netlink APIs. User config still having map_on_demand will
* work but the value will be ignored.
*/
nla_put_flag(msg, LNET_NET_O2IBLND_TUNABLES_ATTR_MAP_ON_DEMAND);
nla_put_u32(msg, LNET_NET_O2IBLND_TUNABLES_ATTR_CONCURRENT_SENDS,
tuns->lnd_concurrent_sends);
nla_put_u32(msg, LNET_NET_O2IBLND_TUNABLES_ATTR_FMR_POOL_SIZE,
tuns->lnd_fmr_pool_size);
nla_put_u32(msg, LNET_NET_O2IBLND_TUNABLES_ATTR_FMR_FLUSH_TRIGGER,
tuns->lnd_fmr_flush_trigger);
nla_put_u32(msg, LNET_NET_O2IBLND_TUNABLES_ATTR_FMR_CACHE,
tuns->lnd_fmr_cache);
nla_put_u16(msg, LNET_NET_O2IBLND_TUNABLES_ATTR_NTX, tuns->lnd_ntx);
nla_put_u16(msg, LNET_NET_O2IBLND_TUNABLES_ATTR_CONNS_PER_PEER,
tuns->lnd_conns_per_peer);
if (!export_backup)
nla_put_u32(msg, LNET_NET_O2IBLND_TUNABLES_ATTR_LND_TIMEOUT,
kiblnd_timeout());
nla_put_s16(msg, LNET_NET_O2IBLND_TUNABLES_ATTR_LND_TOS,
tuns->lnd_tos);
return 0;
}
static int
kiblnd_nl_set(int cmd, struct nlattr *attr, int type, void *data)
{
struct lnet_lnd_tunables *tunables = data;
int rc = 0;
s64 num;
if (cmd != LNET_CMD_NETS)
return -EOPNOTSUPP;
if (!attr || nla_type(attr) != LN_SCALAR_ATTR_INT_VALUE)
return -EINVAL;
switch (type) {
case LNET_NET_O2IBLND_TUNABLES_ATTR_HIW_PEER_CREDITS:
tunables->lnd_tun_u.lnd_o2ib.lnd_peercredits_hiw = nla_get_s64(attr);
break;
case LNET_NET_O2IBLND_TUNABLES_ATTR_CONCURRENT_SENDS:
tunables->lnd_tun_u.lnd_o2ib.lnd_concurrent_sends = nla_get_s64(attr);
break;
case LNET_NET_O2IBLND_TUNABLES_ATTR_FMR_POOL_SIZE:
tunables->lnd_tun_u.lnd_o2ib.lnd_fmr_pool_size = nla_get_s64(attr);
break;
case LNET_NET_O2IBLND_TUNABLES_ATTR_FMR_FLUSH_TRIGGER:
tunables->lnd_tun_u.lnd_o2ib.lnd_fmr_flush_trigger = nla_get_s64(attr);
break;
case LNET_NET_O2IBLND_TUNABLES_ATTR_FMR_CACHE:
tunables->lnd_tun_u.lnd_o2ib.lnd_fmr_cache = nla_get_s64(attr);
break;
case LNET_NET_O2IBLND_TUNABLES_ATTR_NTX:
tunables->lnd_tun_u.lnd_o2ib.lnd_ntx = nla_get_s64(attr);
break;
case LNET_NET_O2IBLND_TUNABLES_ATTR_LND_TIMEOUT:
/* Ignore */
break;
case LNET_NET_O2IBLND_TUNABLES_ATTR_CONNS_PER_PEER:
num = nla_get_s64(attr);
if (num >= 0 && num < 128)
tunables->lnd_tun_u.lnd_o2ib.lnd_conns_per_peer = num;
else
rc = -ERANGE;
break;
case LNET_NET_O2IBLND_TUNABLES_ATTR_LND_TOS:
num = nla_get_s64(attr);
tunables->lnd_tun_u.lnd_o2ib.lnd_tos = num;
fallthrough;
/* map_on_demand is always 1 so ignore any MAP_ON_DEMAND ATTR */
case LNET_NET_O2IBLND_TUNABLES_ATTR_MAP_ON_DEMAND:
fallthrough;
default:
break;
}
return rc;
}
static void
kiblnd_free_pages(struct kib_pages *p)
{
int npages = p->ibp_npages;
int i;
for (i = 0; i < npages; i++) {
if (p->ibp_pages[i] != NULL)
__free_page(p->ibp_pages[i]);
}
LIBCFS_FREE(p, offsetof(struct kib_pages, ibp_pages[npages]));
}
int
kiblnd_alloc_pages(struct kib_pages **pp, int cpt, int npages)
{
struct kib_pages *p;
int i;
LIBCFS_CPT_ALLOC(p, lnet_cpt_table(), cpt,
offsetof(struct kib_pages, ibp_pages[npages]));
if (p == NULL) {
CERROR("Can't allocate descriptor for %d pages\n", npages);
return -ENOMEM;
}
memset(p, 0, offsetof(struct kib_pages, ibp_pages[npages]));
p->ibp_npages = npages;
for (i = 0; i < npages; i++) {
p->ibp_pages[i] = cfs_page_cpt_alloc(lnet_cpt_table(), cpt,
GFP_NOFS);
if (p->ibp_pages[i] == NULL) {
CERROR("Can't allocate page %d of %d\n", i, npages);
kiblnd_free_pages(p);
return -ENOMEM;
}
}
*pp = p;
return 0;
}
void
kiblnd_unmap_rx_descs(struct kib_conn *conn)
{
struct kib_rx *rx;
int i;
LASSERT(conn->ibc_rxs != NULL);
LASSERT(conn->ibc_hdev != NULL);
for (i = 0; i < IBLND_RX_MSGS(conn); i++) {
rx = &conn->ibc_rxs[i];
LASSERT(rx->rx_nob >= 0); /* not posted */
kiblnd_dma_unmap_single(conn->ibc_hdev->ibh_ibdev,
KIBLND_UNMAP_ADDR(rx, rx_msgunmap,
rx->rx_msgaddr),
IBLND_MSG_SIZE, DMA_FROM_DEVICE);
}
kiblnd_free_pages(conn->ibc_rx_pages);
conn->ibc_rx_pages = NULL;
}
void
kiblnd_map_rx_descs(struct kib_conn *conn)
{
struct kib_rx *rx;
struct page *pg;
int pg_off;
int ipg;
int i;
for (pg_off = ipg = i = 0; i < IBLND_RX_MSGS(conn); i++) {
pg = conn->ibc_rx_pages->ibp_pages[ipg];
rx = &conn->ibc_rxs[i];
rx->rx_conn = conn;
rx->rx_msg = (struct kib_msg *)(((char *)page_address(pg)) + pg_off);
rx->rx_msgaddr =
kiblnd_dma_map_single(conn->ibc_hdev->ibh_ibdev,
rx->rx_msg, IBLND_MSG_SIZE,
DMA_FROM_DEVICE);
LASSERT(!kiblnd_dma_mapping_error(conn->ibc_hdev->ibh_ibdev,
rx->rx_msgaddr));
KIBLND_UNMAP_ADDR_SET(rx, rx_msgunmap, rx->rx_msgaddr);
CDEBUG(D_NET, "rx %d: %p %#llx(%#llx)\n",
i, rx->rx_msg, rx->rx_msgaddr,
(__u64)(page_to_phys(pg) + pg_off));
pg_off += IBLND_MSG_SIZE;
LASSERT(pg_off <= PAGE_SIZE);
if (pg_off == PAGE_SIZE) {
pg_off = 0;
ipg++;
LASSERT(ipg <= IBLND_RX_MSG_PAGES(conn));
}
}
}
static void
kiblnd_unmap_tx_pool(struct kib_tx_pool *tpo)
{
struct kib_hca_dev *hdev = tpo->tpo_hdev;
struct kib_tx *tx;
int i;
LASSERT(tpo->tpo_pool.po_allocated == 0);
if (hdev == NULL)
return;
for (i = 0; i < tpo->tpo_pool.po_size; i++) {
tx = &tpo->tpo_tx_descs[i];
kiblnd_dma_unmap_single(hdev->ibh_ibdev,
KIBLND_UNMAP_ADDR(tx, tx_msgunmap,
tx->tx_msgaddr),
IBLND_MSG_SIZE, DMA_TO_DEVICE);
}
kiblnd_hdev_decref(hdev);
tpo->tpo_hdev = NULL;
}
static struct kib_hca_dev *
kiblnd_current_hdev(struct kib_dev *dev)
{
struct kib_hca_dev *hdev;
unsigned long flags;
int i = 0;
read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
while (dev->ibd_failover) {
read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
if (i++ % 50 == 0)
CDEBUG(D_NET, "%s: Wait for failover\n",
dev->ibd_ifname);
schedule_timeout_interruptible(cfs_time_seconds(1) / 100);
read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
}
kiblnd_hdev_addref_locked(dev->ibd_hdev);
hdev = dev->ibd_hdev;
read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
return hdev;
}
static void
kiblnd_map_tx_pool(struct kib_tx_pool *tpo)
{
struct kib_pages *txpgs = tpo->tpo_tx_pages;
struct kib_pool *pool = &tpo->tpo_pool;
struct kib_net *net = pool->po_owner->ps_net;
struct kib_dev *dev;
struct page *page;
struct kib_tx *tx;
int page_offset;
int ipage;
int i;
LASSERT(net != NULL);
dev = net->ibn_dev;
/* pre-mapped messages are not bigger than 1 page */
BUILD_BUG_ON(IBLND_MSG_SIZE > PAGE_SIZE);
/* No fancy arithmetic when we do the buffer calculations */
BUILD_BUG_ON(PAGE_SIZE % IBLND_MSG_SIZE != 0);
tpo->tpo_hdev = kiblnd_current_hdev(dev);
for (ipage = page_offset = i = 0; i < pool->po_size; i++) {
page = txpgs->ibp_pages[ipage];
tx = &tpo->tpo_tx_descs[i];
tx->tx_msg = (struct kib_msg *)(((char *)page_address(page)) +
page_offset);
tx->tx_msgaddr = kiblnd_dma_map_single(tpo->tpo_hdev->ibh_ibdev,
tx->tx_msg,
IBLND_MSG_SIZE,
DMA_TO_DEVICE);
LASSERT(!kiblnd_dma_mapping_error(tpo->tpo_hdev->ibh_ibdev,
tx->tx_msgaddr));
KIBLND_UNMAP_ADDR_SET(tx, tx_msgunmap, tx->tx_msgaddr);
list_add(&tx->tx_list, &pool->po_free_list);
page_offset += IBLND_MSG_SIZE;
LASSERT(page_offset <= PAGE_SIZE);
if (page_offset == PAGE_SIZE) {
page_offset = 0;
ipage++;
LASSERT(ipage <= txpgs->ibp_npages);
}
}
}
static void
kiblnd_destroy_fmr_pool(struct kib_fmr_pool *fpo)
{
#ifndef HAVE_OFED_FMR_POOL_API
struct kib_fast_reg_descriptor *frd, *tmp;
int i = 0;
list_for_each_entry_safe(frd, tmp, &fpo->fast_reg.fpo_pool_list,
frd_list) {
list_del(&frd->frd_list);
ib_dereg_mr(frd->frd_mr);
LIBCFS_FREE(frd, sizeof(*frd));
i++;
}
if (i < fpo->fast_reg.fpo_pool_size)
CERROR("FastReg pool still has %d regions registered\n",
fpo->fast_reg.fpo_pool_size - i);
#else
if (fpo->fpo_is_fmr && fpo->fmr.fpo_fmr_pool)
ib_destroy_fmr_pool(fpo->fmr.fpo_fmr_pool);
#endif /* HAVE_OFED_FMR_POOL_API */
}
static void
kiblnd_destroy_fmr_pool_list(struct list_head *head)
{
struct kib_fmr_pool *fpo, *tmp;
list_for_each_entry_safe(fpo, tmp, head, fpo_list) {
list_del(&fpo->fpo_list);
LASSERT(fpo->fpo_map_count == 0);
kiblnd_destroy_fmr_pool(fpo);
if (fpo->fpo_hdev)
kiblnd_hdev_decref(fpo->fpo_hdev);
LIBCFS_FREE(fpo, sizeof(*fpo));
}
}
static int
kiblnd_fmr_pool_size(struct lnet_ioctl_config_o2iblnd_tunables *tunables,
int ncpts)
{
int size = tunables->lnd_fmr_pool_size / ncpts;
return max(IBLND_FMR_POOL, size);
}
static int
kiblnd_fmr_flush_trigger(struct lnet_ioctl_config_o2iblnd_tunables *tunables,
int ncpts)
{
int size = tunables->lnd_fmr_flush_trigger / ncpts;
return max(IBLND_FMR_POOL_FLUSH, size);
}
#ifdef HAVE_OFED_FMR_POOL_API
static int kiblnd_alloc_fmr_pool(struct kib_fmr_poolset *fps,
struct kib_fmr_pool *fpo)
{
struct ib_fmr_pool_param param = {
.max_pages_per_fmr = IBLND_MAX_RDMA_FRAGS,
.page_shift = PAGE_SHIFT,
.access = (IB_ACCESS_LOCAL_WRITE |
IB_ACCESS_REMOTE_WRITE),
.pool_size = fps->fps_pool_size,
.dirty_watermark = fps->fps_flush_trigger,
.flush_function = NULL,
.flush_arg = NULL,
.cache = !!fps->fps_cache };
int rc = 0;
fpo->fmr.fpo_fmr_pool = ib_create_fmr_pool(fpo->fpo_hdev->ibh_pd,
¶m);
if (IS_ERR(fpo->fmr.fpo_fmr_pool)) {
rc = PTR_ERR(fpo->fmr.fpo_fmr_pool);
if (rc != -ENOSYS)
CERROR("Failed to create FMR pool: %d\n", rc);
else
CERROR("FMRs are not supported\n");
}
fpo->fpo_is_fmr = true;
return rc;
}
#endif /* HAVE_OFED_FMR_POOL_API */
static int kiblnd_alloc_freg_pool(struct kib_fmr_poolset *fps,
struct kib_fmr_pool *fpo,
enum kib_dev_caps dev_caps)
{
struct kib_fast_reg_descriptor *frd;
int i, rc;
#ifdef HAVE_OFED_FMR_POOL_API
fpo->fpo_is_fmr = false;
#endif
INIT_LIST_HEAD(&fpo->fast_reg.fpo_pool_list);
fpo->fast_reg.fpo_pool_size = 0;
for (i = 0; i < fps->fps_pool_size; i++) {
bool fastreg_gaps = false;
LIBCFS_CPT_ALLOC(frd, lnet_cpt_table(), fps->fps_cpt,
sizeof(*frd));
if (!frd) {
CERROR("Failed to allocate a new fast_reg descriptor\n");
rc = -ENOMEM;
goto out;
}
frd->frd_mr = NULL;
/* it is expected to get here if this is an MLX-5 card.
* MLX-4 cards will always use FMR and MLX-5 cards will
* always use fast_reg. It turns out that some MLX-5 cards
* (possibly due to older FW versions) do not natively support
* gaps. So we will need to track them here.
*/
if ((*kiblnd_tunables.kib_use_fastreg_gaps == 1) &&
(dev_caps & IBLND_DEV_CAPS_FASTREG_GAPS_SUPPORT)) {
CWARN("using IB_MR_TYPE_SG_GAPS, expect a performance drop\n");
fastreg_gaps = true;
}
frd->frd_mr = ib_alloc_mr(fpo->fpo_hdev->ibh_pd,
fastreg_gaps ? IB_MR_TYPE_SG_GAPS :
IB_MR_TYPE_MEM_REG,
IBLND_MAX_RDMA_FRAGS);
if (IS_ERR(frd->frd_mr)) {
rc = PTR_ERR(frd->frd_mr);
CERROR("Failed to allocate ib_fast_reg_mr: %d\n", rc);
frd->frd_mr = NULL;
goto out_middle;
}
/* indicate that the local invalidate needs to be generated */
frd->frd_valid = false;
list_add_tail(&frd->frd_list, &fpo->fast_reg.fpo_pool_list);
fpo->fast_reg.fpo_pool_size++;
}
return 0;
out_middle:
if (frd->frd_mr)
ib_dereg_mr(frd->frd_mr);
LIBCFS_FREE(frd, sizeof(*frd));
out:
while (!list_empty(&fpo->fast_reg.fpo_pool_list)) {
frd = list_first_entry(&fpo->fast_reg.fpo_pool_list,
struct kib_fast_reg_descriptor,
frd_list);
list_del(&frd->frd_list);
ib_dereg_mr(frd->frd_mr);
LIBCFS_FREE(frd, sizeof(*frd));
}
return rc;
}
static int kiblnd_create_fmr_pool(struct kib_fmr_poolset *fps,
struct kib_fmr_pool **pp_fpo)
{
struct kib_dev *dev = fps->fps_net->ibn_dev;
struct kib_fmr_pool *fpo;
int rc;
LIBCFS_CPT_ALLOC(fpo, lnet_cpt_table(), fps->fps_cpt, sizeof(*fpo));
if (!fpo)
return -ENOMEM;
memset(fpo, 0, sizeof(*fpo));
fpo->fpo_hdev = kiblnd_current_hdev(dev);
#ifdef HAVE_OFED_FMR_POOL_API
if (dev->ibd_dev_caps & IBLND_DEV_CAPS_FMR_ENABLED)
rc = kiblnd_alloc_fmr_pool(fps, fpo);
else
#endif /* HAVE_OFED_FMR_POOL_API */
rc = kiblnd_alloc_freg_pool(fps, fpo, dev->ibd_dev_caps);
if (rc)
goto out_fpo;
fpo->fpo_deadline = ktime_get_seconds() + IBLND_POOL_DEADLINE;
fpo->fpo_owner = fps;
*pp_fpo = fpo;
return 0;
out_fpo:
kiblnd_hdev_decref(fpo->fpo_hdev);
LIBCFS_FREE(fpo, sizeof(*fpo));
return rc;
}
static void
kiblnd_fail_fmr_poolset(struct kib_fmr_poolset *fps, struct list_head *zombies)
{
struct kib_fmr_pool *fpo;
if (fps->fps_net == NULL) /* intialized? */
return;
spin_lock(&fps->fps_lock);
while ((fpo = list_first_entry_or_null(&fps->fps_pool_list,
struct kib_fmr_pool,
fpo_list)) != NULL) {
fpo->fpo_failed = 1;
if (fpo->fpo_map_count == 0)
list_move(&fpo->fpo_list, zombies);
else
list_move(&fpo->fpo_list, &fps->fps_failed_pool_list);
}
spin_unlock(&fps->fps_lock);
}
static void
kiblnd_fini_fmr_poolset(struct kib_fmr_poolset *fps)
{
LIST_HEAD(fps_failed_pool_list);
LIST_HEAD(fps_pool_list);
if (fps->fps_net != NULL) { /* initialized? */
/* added spinlock to protect poolset */
spin_lock(&fps->fps_lock);
list_splice(&fps->fps_failed_pool_list, &fps_failed_pool_list);
list_splice(&fps->fps_pool_list, &fps_pool_list);
INIT_LIST_HEAD(&fps->fps_failed_pool_list);
INIT_LIST_HEAD(&fps->fps_pool_list);
spin_unlock(&fps->fps_lock);
kiblnd_destroy_fmr_pool_list(&fps_failed_pool_list);
kiblnd_destroy_fmr_pool_list(&fps_pool_list);
}
}
static int
kiblnd_init_fmr_poolset(struct kib_fmr_poolset *fps, int cpt, int ncpts,
struct kib_net *net,
struct lnet_ioctl_config_o2iblnd_tunables *tunables)
{
struct kib_fmr_pool *fpo;
int rc;
memset(fps, 0, sizeof(struct kib_fmr_poolset));
fps->fps_net = net;
fps->fps_cpt = cpt;
fps->fps_pool_size = kiblnd_fmr_pool_size(tunables, ncpts);
fps->fps_flush_trigger = kiblnd_fmr_flush_trigger(tunables, ncpts);
fps->fps_cache = tunables->lnd_fmr_cache;
spin_lock_init(&fps->fps_lock);
INIT_LIST_HEAD(&fps->fps_pool_list);
INIT_LIST_HEAD(&fps->fps_failed_pool_list);
rc = kiblnd_create_fmr_pool(fps, &fpo);
if (rc == 0)
list_add_tail(&fpo->fpo_list, &fps->fps_pool_list);
return rc;
}
static int
kiblnd_fmr_pool_is_idle(struct kib_fmr_pool *fpo, time64_t now)
{
if (fpo->fpo_map_count != 0) /* still in use */
return 0;
if (fpo->fpo_failed)
return 1;
return now >= fpo->fpo_deadline;
}
#ifdef HAVE_OFED_FMR_POOL_API
static int
kiblnd_map_tx_pages(struct kib_tx *tx, struct kib_rdma_desc *rd)
{
struct kib_hca_dev *hdev;
__u64 *pages = tx->tx_pages;
int npages;
int size;
int i;
hdev = tx->tx_pool->tpo_hdev;
for (i = 0, npages = 0; i < rd->rd_nfrags; i++) {
for (size = 0; size < rd->rd_frags[i].rf_nob;
size += hdev->ibh_page_size) {
pages[npages++] = (rd->rd_frags[i].rf_addr &
hdev->ibh_page_mask) + size;
}
}
return npages;
}
#endif
void
kiblnd_fmr_pool_unmap(struct kib_fmr *fmr, int status)
{
LIST_HEAD(zombies);
struct kib_fmr_pool *fpo = fmr->fmr_pool;
struct kib_fmr_poolset *fps;
time64_t now = ktime_get_seconds();
struct kib_fmr_pool *tmp;
if (!fpo)
return;
fps = fpo->fpo_owner;
#ifdef HAVE_OFED_FMR_POOL_API
if (fpo->fpo_is_fmr) {
if (fmr->fmr_pfmr) {
ib_fmr_pool_unmap(fmr->fmr_pfmr);
fmr->fmr_pfmr = NULL;
}
if (status) {
int rc = ib_flush_fmr_pool(fpo->fmr.fpo_fmr_pool);
LASSERT(!rc);
}
} else
#endif /* HAVE_OFED_FMR_POOL_API */
{
struct kib_fast_reg_descriptor *frd = fmr->fmr_frd;
if (frd) {
frd->frd_posted = false;
fmr->fmr_frd = NULL;
spin_lock(&fps->fps_lock);
list_add_tail(&frd->frd_list,
&fpo->fast_reg.fpo_pool_list);
spin_unlock(&fps->fps_lock);
}
}
fmr->fmr_pool = NULL;
spin_lock(&fps->fps_lock);
fpo->fpo_map_count--; /* decref the pool */
list_for_each_entry_safe(fpo, tmp, &fps->fps_pool_list, fpo_list) {
/* the first pool is persistent */
if (fps->fps_pool_list.next == &fpo->fpo_list)
continue;
if (kiblnd_fmr_pool_is_idle(fpo, now)) {
list_move(&fpo->fpo_list, &zombies);
fps->fps_version++;
}
}
spin_unlock(&fps->fps_lock);
if (!list_empty(&zombies))
kiblnd_destroy_fmr_pool_list(&zombies);
}
int kiblnd_fmr_pool_map(struct kib_fmr_poolset *fps, struct kib_tx *tx,
struct kib_rdma_desc *rd, u32 nob, u64 iov,
struct kib_fmr *fmr)
{
struct kib_fmr_pool *fpo;
__u64 version;
bool is_rx = (rd != tx->tx_rd);
#ifdef HAVE_OFED_FMR_POOL_API
u64 *pages = tx->tx_pages;
bool tx_pages_mapped = false;
struct ib_pool_fmr *pfmr;
int npages = 0;
#endif
int rc;
again:
spin_lock(&fps->fps_lock);
version = fps->fps_version;
list_for_each_entry(fpo, &fps->fps_pool_list, fpo_list) {
fpo->fpo_deadline = ktime_get_seconds() + IBLND_POOL_DEADLINE;
fpo->fpo_map_count++;
#ifdef HAVE_OFED_FMR_POOL_API
fmr->fmr_pfmr = NULL;
if (!fpo->fpo_is_fmr)
goto no_fmr;
spin_unlock(&fps->fps_lock);
if (!tx_pages_mapped) {
npages = kiblnd_map_tx_pages(tx, rd);
tx_pages_mapped = true;
}
pfmr = ib_fmr_pool_map_phys(fpo->fmr.fpo_fmr_pool,
pages, npages, iov);
if (IS_ERR(pfmr)) {
rc = PTR_ERR(pfmr);
} else {
fmr->fmr_key = is_rx ? pfmr->fmr->rkey :
pfmr->fmr->lkey;
fmr->fmr_frd = NULL;
fmr->fmr_pfmr = pfmr;
fmr->fmr_pool = fpo;
return 0;
}
no_fmr:
#endif /* HAVE_OFED_FMR_POOL_API */
if (!list_empty(&fpo->fast_reg.fpo_pool_list)) {
struct kib_fast_reg_descriptor *frd;
struct ib_reg_wr *wr;
struct ib_mr *mr;
int n;
frd = list_first_entry(&fpo->fast_reg.fpo_pool_list,
struct kib_fast_reg_descriptor,
frd_list);
list_del(&frd->frd_list);
spin_unlock(&fps->fps_lock);
mr = frd->frd_mr;
if (!frd->frd_valid) {
u32 key = is_rx ? mr->rkey : mr->lkey;
struct ib_rdma_wr *inv_wr;
frd->frd_valid = true;
inv_wr = &frd->frd_inv_wr;
memset(inv_wr, 0, sizeof(*inv_wr));
inv_wr->wr.opcode = IB_WR_LOCAL_INV;
inv_wr->wr.wr_id = IBLND_WID_MR;
inv_wr->wr.ex.invalidate_rkey = key;
/* Bump the key */
key = ib_inc_rkey(key);
ib_update_fast_reg_key(mr, key);
}
n = ib_map_mr_sg(mr, tx->tx_frags, rd->rd_nfrags,
NULL, PAGE_SIZE);
if (unlikely(n != rd->rd_nfrags)) {
CERROR("Failed to map mr %d/%d elements\n",
n, rd->rd_nfrags);
return n < 0 ? n : -EINVAL;
}
/* Prepare FastReg WR */
wr = &frd->frd_fastreg_wr;
memset(wr, 0, sizeof(*wr));
wr->wr.opcode = IB_WR_REG_MR;
wr->wr.wr_id = IBLND_WID_MR;
wr->wr.num_sge = 0;
wr->wr.send_flags = 0;
wr->mr = mr;
wr->key = is_rx ? mr->rkey : mr->lkey;
wr->access = (IB_ACCESS_LOCAL_WRITE |
IB_ACCESS_REMOTE_WRITE);
fmr->fmr_key = is_rx ? mr->rkey : mr->lkey;
fmr->fmr_frd = frd;
fmr->fmr_pool = fpo;
frd->frd_posted = false;
return 0;
}
/* EAGAIN and ... */
rc = -EAGAIN;
fpo->fpo_map_count--;
if (version != fps->fps_version) {
spin_unlock(&fps->fps_lock);
goto again;
}
}
if (fps->fps_increasing) {
spin_unlock(&fps->fps_lock);
CDEBUG(D_NET,
"Another thread is allocating new FMR pool, waiting for her to complete\n");
wait_var_event(fps, !fps->fps_increasing);
goto again;
}
if (ktime_get_seconds() < fps->fps_next_retry) {
/* someone failed recently */
spin_unlock(&fps->fps_lock);
return -EAGAIN;
}
fps->fps_increasing = 1;
spin_unlock(&fps->fps_lock);
CDEBUG(D_NET, "Allocate new FMR pool\n");
rc = kiblnd_create_fmr_pool(fps, &fpo);
spin_lock(&fps->fps_lock);
fps->fps_increasing = 0;
wake_up_var(fps);
if (rc == 0) {
fps->fps_version++;
list_add_tail(&fpo->fpo_list, &fps->fps_pool_list);
} else {
fps->fps_next_retry = ktime_get_seconds() + IBLND_POOL_RETRY;
}
spin_unlock(&fps->fps_lock);
goto again;
}
static void
kiblnd_fini_pool(struct kib_pool *pool)
{
LASSERT(list_empty(&pool->po_free_list));
LASSERT(pool->po_allocated == 0);
CDEBUG(D_NET, "Finalize %s pool\n", pool->po_owner->ps_name);
}
static void
kiblnd_init_pool(struct kib_poolset *ps, struct kib_pool *pool, int size)
{
CDEBUG(D_NET, "Initialize %s pool\n", ps->ps_name);
memset(pool, 0, sizeof(struct kib_pool));
INIT_LIST_HEAD(&pool->po_free_list);
pool->po_deadline = ktime_get_seconds() + IBLND_POOL_DEADLINE;
pool->po_owner = ps;
pool->po_size = size;
}
static void
kiblnd_destroy_pool_list(struct list_head *head)
{
struct kib_pool *pool;
while ((pool = list_first_entry_or_null(head,
struct kib_pool,
po_list)) != NULL) {
list_del(&pool->po_list);
LASSERT(pool->po_owner != NULL);
pool->po_owner->ps_pool_destroy(pool);
}
}
static void
kiblnd_fail_poolset(struct kib_poolset *ps, struct list_head *zombies)
{
struct kib_pool *po;
if (ps->ps_net == NULL) /* intialized? */
return;
spin_lock(&ps->ps_lock);
while ((po = list_first_entry_or_null(&ps->ps_pool_list,
struct kib_pool,
po_list)) != NULL) {
po->po_failed = 1;
if (po->po_allocated == 0)
list_move(&po->po_list, zombies);
else
list_move(&po->po_list, &ps->ps_failed_pool_list);
}
spin_unlock(&ps->ps_lock);
}
static void
kiblnd_fini_poolset(struct kib_poolset *ps)
{
LIST_HEAD(ps_failed_pool_list);
LIST_HEAD(ps_pool_list);
if (ps->ps_net != NULL) { /* initialized? */
/* added spinlock to protect poolset */
spin_lock(&ps->ps_lock);
list_splice(&ps->ps_failed_pool_list, &ps_failed_pool_list);
list_splice(&ps->ps_pool_list, &ps_pool_list);
INIT_LIST_HEAD(&ps->ps_failed_pool_list);
INIT_LIST_HEAD(&ps->ps_pool_list);
spin_unlock(&ps->ps_lock);
kiblnd_destroy_pool_list(&ps_failed_pool_list);
kiblnd_destroy_pool_list(&ps_pool_list);
}
}
static int
kiblnd_init_poolset(struct kib_poolset *ps, int cpt,
struct kib_net *net, char *name, int size,
kib_ps_pool_create_t po_create,
kib_ps_pool_destroy_t po_destroy,
kib_ps_node_init_t nd_init,
kib_ps_node_fini_t nd_fini)
{
struct kib_pool *pool;
int rc;
memset(ps, 0, sizeof(struct kib_poolset));
ps->ps_cpt = cpt;
ps->ps_net = net;
ps->ps_pool_create = po_create;
ps->ps_pool_destroy = po_destroy;
ps->ps_node_init = nd_init;
ps->ps_node_fini = nd_fini;
ps->ps_pool_size = size;
rc = strscpy(ps->ps_name, name, sizeof(ps->ps_name));
if (rc < 0)
return rc;
spin_lock_init(&ps->ps_lock);
INIT_LIST_HEAD(&ps->ps_pool_list);
INIT_LIST_HEAD(&ps->ps_failed_pool_list);
rc = ps->ps_pool_create(ps, size, &pool);
if (rc == 0)
list_add(&pool->po_list, &ps->ps_pool_list);
else
CERROR("Failed to create the first pool for %s\n", ps->ps_name);
return rc;
}
static int
kiblnd_pool_is_idle(struct kib_pool *pool, time64_t now)
{
if (pool->po_allocated != 0) /* still in use */
return 0;
if (pool->po_failed)
return 1;
return now >= pool->po_deadline;
}
void
kiblnd_pool_free_node(struct kib_pool *pool, struct list_head *node)
{
LIST_HEAD(zombies);
struct kib_poolset *ps = pool->po_owner;
struct kib_pool *tmp;
time64_t now = ktime_get_seconds();
spin_lock(&ps->ps_lock);
if (ps->ps_node_fini != NULL)
ps->ps_node_fini(pool, node);
LASSERT(pool->po_allocated > 0);
list_add(node, &pool->po_free_list);
pool->po_allocated--;
list_for_each_entry_safe(pool, tmp, &ps->ps_pool_list, po_list) {
/* the first pool is persistent */
if (ps->ps_pool_list.next == &pool->po_list)
continue;
if (kiblnd_pool_is_idle(pool, now))
list_move(&pool->po_list, &zombies);
}
spin_unlock(&ps->ps_lock);
if (!list_empty(&zombies))
kiblnd_destroy_pool_list(&zombies);
}
struct list_head *
kiblnd_pool_alloc_node(struct kib_poolset *ps)
{
struct list_head *node;
struct kib_pool *pool;
int rc;
unsigned int interval = 1;
ktime_t time_before;
unsigned int trips = 0;
again:
spin_lock(&ps->ps_lock);
list_for_each_entry(pool, &ps->ps_pool_list, po_list) {
if (list_empty(&pool->po_free_list))
continue;
pool->po_allocated++;
pool->po_deadline = ktime_get_seconds() +
IBLND_POOL_DEADLINE;
node = pool->po_free_list.next;
list_del(node);
if (ps->ps_node_init != NULL) {
/* still hold the lock */
ps->ps_node_init(pool, node);
}
spin_unlock(&ps->ps_lock);
return node;
}
/* no available tx pool and ... */
if (ps->ps_increasing) {
/* another thread is allocating a new pool */
spin_unlock(&ps->ps_lock);
trips++;
CDEBUG(D_NET,
"Another thread is allocating new %s pool, waiting %d jiffies for her to complete. trips = %d\n",
ps->ps_name, interval, trips);
schedule_timeout_interruptible(interval);
if (interval < cfs_time_seconds(1))
interval *= 2;
goto again;
}
if (ktime_get_seconds() < ps->ps_next_retry) {
/* someone failed recently */
spin_unlock(&ps->ps_lock);
return NULL;
}
ps->ps_increasing = 1;
spin_unlock(&ps->ps_lock);
CDEBUG(D_NET, "%s pool exhausted, allocate new pool\n", ps->ps_name);
time_before = ktime_get();
rc = ps->ps_pool_create(ps, ps->ps_pool_size, &pool);
CDEBUG(D_NET, "ps_pool_create took %lld ms to complete\n",
ktime_ms_delta(ktime_get(), time_before));
spin_lock(&ps->ps_lock);
ps->ps_increasing = 0;
if (rc == 0) {
list_add_tail(&pool->po_list, &ps->ps_pool_list);
} else {
ps->ps_next_retry = ktime_get_seconds() + IBLND_POOL_RETRY;
CERROR("Can't allocate new %s pool because out of memory\n",
ps->ps_name);
}
spin_unlock(&ps->ps_lock);
goto again;
}
static void
kiblnd_destroy_tx_pool(struct kib_pool *pool)
{
struct kib_tx_pool *tpo = container_of(pool, struct kib_tx_pool,
tpo_pool);
int i;
LASSERT(pool->po_allocated == 0);
if (tpo->tpo_tx_pages != NULL) {
kiblnd_unmap_tx_pool(tpo);
kiblnd_free_pages(tpo->tpo_tx_pages);
}
if (tpo->tpo_tx_descs == NULL)
goto out;
for (i = 0; i < pool->po_size; i++) {
struct kib_tx *tx = &tpo->tpo_tx_descs[i];
int wrq_sge = *kiblnd_tunables.kib_wrq_sge;
list_del(&tx->tx_list);
CFS_FREE_PTR_ARRAY(tx->tx_pages, LNET_MAX_IOV);
CFS_FREE_PTR_ARRAY(tx->tx_frags,
IBLND_MAX_RDMA_FRAGS);
CFS_FREE_PTR_ARRAY(tx->tx_wrq,
IBLND_MAX_RDMA_FRAGS);
if (tx->tx_sge != NULL) {
/* +1 is for the lnet header/message itself */
CFS_FREE_PTR_ARRAY(tx->tx_sge,
(IBLND_MAX_RDMA_FRAGS *
wrq_sge + 1));
}
LIBCFS_FREE(tx->tx_rd,
offsetof(struct kib_rdma_desc,
rd_frags[IBLND_MAX_RDMA_FRAGS]));
}
CFS_FREE_PTR_ARRAY(tpo->tpo_tx_descs, pool->po_size);
out:
kiblnd_fini_pool(pool);
CFS_FREE_PTR(tpo);
}
static int kiblnd_tx_pool_size(struct lnet_ni *ni, int ncpts)
{
struct lnet_ioctl_config_o2iblnd_tunables *tunables;
int ntx;
tunables = &ni->ni_lnd_tunables.lnd_tun_u.lnd_o2ib;
ntx = tunables->lnd_ntx / ncpts;
return max(IBLND_TX_POOL, ntx);
}
static int
kiblnd_create_tx_pool(struct kib_poolset *ps, int size, struct kib_pool **pp_po)
{
int i;
int npg;
struct kib_pool *pool;
struct kib_tx_pool *tpo;
LIBCFS_CPT_ALLOC(tpo, lnet_cpt_table(), ps->ps_cpt, sizeof(*tpo));
if (tpo == NULL) {
CERROR("Failed to allocate TX pool\n");
return -ENOMEM;
}
pool = &tpo->tpo_pool;
kiblnd_init_pool(ps, pool, size);
tpo->tpo_tx_descs = NULL;
tpo->tpo_tx_pages = NULL;
npg = (size * IBLND_MSG_SIZE + PAGE_SIZE - 1) / PAGE_SIZE;
if (kiblnd_alloc_pages(&tpo->tpo_tx_pages, ps->ps_cpt, npg) != 0) {
CERROR("Can't allocate tx pages: %d\n", npg);
CFS_FREE_PTR(tpo);
return -ENOMEM;
}
LIBCFS_CPT_ALLOC(tpo->tpo_tx_descs, lnet_cpt_table(), ps->ps_cpt,
size * sizeof(struct kib_tx));
if (tpo->tpo_tx_descs == NULL) {
CERROR("Can't allocate %d tx descriptors\n", size);
ps->ps_pool_destroy(pool);
return -ENOMEM;
}
memset(tpo->tpo_tx_descs, 0, size * sizeof(struct kib_tx));
for (i = 0; i < size; i++) {
struct kib_tx *tx = &tpo->tpo_tx_descs[i];
int wrq_sge = *kiblnd_tunables.kib_wrq_sge;
tx->tx_pool = tpo;
if (ps->ps_net->ibn_fmr_ps != NULL) {
LIBCFS_CPT_ALLOC(tx->tx_pages,
lnet_cpt_table(), ps->ps_cpt,
LNET_MAX_IOV * sizeof(*tx->tx_pages));
if (tx->tx_pages == NULL)
break;
}
LIBCFS_CPT_ALLOC(tx->tx_frags, lnet_cpt_table(), ps->ps_cpt,
IBLND_MAX_RDMA_FRAGS *
sizeof(*tx->tx_frags));
if (tx->tx_frags == NULL)
break;
sg_init_table(tx->tx_frags, IBLND_MAX_RDMA_FRAGS);
LIBCFS_CPT_ALLOC(tx->tx_wrq, lnet_cpt_table(), ps->ps_cpt,
IBLND_MAX_RDMA_FRAGS *
sizeof(*tx->tx_wrq));
if (tx->tx_wrq == NULL)
break;
/* +1 is for the lnet header/message itself */
LIBCFS_CPT_ALLOC(tx->tx_sge, lnet_cpt_table(), ps->ps_cpt,
(IBLND_MAX_RDMA_FRAGS * wrq_sge + 1) *
sizeof(*tx->tx_sge));
if (tx->tx_sge == NULL)
break;
LIBCFS_CPT_ALLOC(tx->tx_rd, lnet_cpt_table(), ps->ps_cpt,
offsetof(struct kib_rdma_desc,
rd_frags[IBLND_MAX_RDMA_FRAGS]));
if (tx->tx_rd == NULL)
break;
}
if (i == size) {
kiblnd_map_tx_pool(tpo);
*pp_po = pool;
return 0;
}
ps->ps_pool_destroy(pool);
return -ENOMEM;
}
static void
kiblnd_tx_init(struct kib_pool *pool, struct list_head *node)
{
struct kib_tx_poolset *tps = container_of(pool->po_owner,
struct kib_tx_poolset,
tps_poolset);
struct kib_tx *tx = list_entry(node, struct kib_tx, tx_list);
tx->tx_cookie = tps->tps_next_tx_cookie++;
}
static void
kiblnd_net_fini_pools(struct kib_net *net)
{
int i;
cfs_cpt_for_each(i, lnet_cpt_table()) {
struct kib_tx_poolset *tps;
struct kib_fmr_poolset *fps;
if (net->ibn_tx_ps != NULL) {
tps = net->ibn_tx_ps[i];
kiblnd_fini_poolset(&tps->tps_poolset);
}
if (net->ibn_fmr_ps != NULL) {
fps = net->ibn_fmr_ps[i];
kiblnd_fini_fmr_poolset(fps);
}
}
if (net->ibn_tx_ps != NULL) {
cfs_percpt_free(net->ibn_tx_ps);
net->ibn_tx_ps = NULL;
}
if (net->ibn_fmr_ps != NULL) {
cfs_percpt_free(net->ibn_fmr_ps);
net->ibn_fmr_ps = NULL;
}
}
static int
kiblnd_net_init_pools(struct kib_net *net, struct lnet_ni *ni, __u32 *cpts,
int ncpts)
{
struct lnet_ioctl_config_o2iblnd_tunables *tunables;
int cpt;
int rc;
int i;
tunables = &ni->ni_lnd_tunables.lnd_tun_u.lnd_o2ib;
if (tunables->lnd_fmr_pool_size < tunables->lnd_ntx / 4) {
CERROR("Can't set fmr pool size (%d) < ntx / 4(%d)\n",
tunables->lnd_fmr_pool_size,
tunables->lnd_ntx / 4);
rc = -EINVAL;
goto failed;
}
/* TX pool must be created later than FMR, see LU-2268
* for details
*/
LASSERT(net->ibn_tx_ps == NULL);
/* premapping can fail if ibd_nmr > 1, so we always create
* FMR pool and map-on-demand if premapping failed
*/
net->ibn_fmr_ps = cfs_percpt_alloc(lnet_cpt_table(),
sizeof(struct kib_fmr_poolset));
if (net->ibn_fmr_ps == NULL) {
CERROR("Failed to allocate FMR pool array\n");
rc = -ENOMEM;
goto failed;
}
for (i = 0; i < ncpts; i++) {
cpt = (cpts == NULL) ? i : cpts[i];
rc = kiblnd_init_fmr_poolset(net->ibn_fmr_ps[cpt], cpt, ncpts,
net, tunables);
if (rc != 0) {
CERROR("Can't initialize FMR pool for CPT %d: %d\n",
cpt, rc);
goto failed;
}
}
if (i > 0)
LASSERT(i == ncpts);
net->ibn_tx_ps = cfs_percpt_alloc(lnet_cpt_table(),
sizeof(struct kib_tx_poolset));
if (net->ibn_tx_ps == NULL) {
CERROR("Failed to allocate tx pool array\n");
rc = -ENOMEM;
goto failed;
}
for (i = 0; i < ncpts; i++) {
cpt = (cpts == NULL) ? i : cpts[i];
rc = kiblnd_init_poolset(&net->ibn_tx_ps[cpt]->tps_poolset,
cpt, net, "TX",
kiblnd_tx_pool_size(ni, ncpts),
kiblnd_create_tx_pool,
kiblnd_destroy_tx_pool,
kiblnd_tx_init, NULL);
if (rc != 0) {
CERROR("Can't initialize TX pool for CPT %d: %d\n",
cpt, rc);
goto failed;
}
}
return 0;
failed:
kiblnd_net_fini_pools(net);
LASSERT(rc != 0);
return rc;
}
static int
kiblnd_port_get_attr(struct kib_hca_dev *hdev)
{
struct ib_port_attr *port_attr;
int rc;
unsigned long flags;
rwlock_t *g_lock = &kiblnd_data.kib_global_lock;
LIBCFS_ALLOC(port_attr, sizeof(*port_attr));
if (port_attr == NULL) {
CDEBUG(D_NETERROR, "Out of memory\n");
return -ENOMEM;
}
rc = ib_query_port(hdev->ibh_ibdev, hdev->ibh_port, port_attr);
write_lock_irqsave(g_lock, flags);
if (rc == 0)
hdev->ibh_state = port_attr->state == IB_PORT_ACTIVE
? IBLND_DEV_PORT_ACTIVE
: IBLND_DEV_PORT_DOWN;
write_unlock_irqrestore(g_lock, flags);
LIBCFS_FREE(port_attr, sizeof(*port_attr));
if (rc != 0) {
CDEBUG(D_NETERROR, "Failed to query IB port: %d\n", rc);
return rc;
}
return 0;
}
static inline void
kiblnd_set_ni_fatal_on(struct kib_hca_dev *hdev, int val)
{
struct kib_net *net;
__u32 ni_state_before;
bool update_ping_buf = false;
struct lnet_ni *ni = NULL;
/* for health check */
list_for_each_entry(net, &hdev->ibh_dev->ibd_nets, ibn_list) {
ni = net->ibn_ni;
if (val)
CDEBUG(D_NETERROR, "Fatal device error for NI %s\n",
libcfs_nidstr(&ni->ni_nid));
ni_state_before = lnet_set_link_fatal_state(ni, val);
if (!update_ping_buf &&
(ni->ni_state == LNET_NI_STATE_ACTIVE) &&
(val != ni_state_before) &&
(net->ibn_init == IBLND_INIT_ALL))
update_ping_buf = true;
}
if (update_ping_buf)
lnet_mark_ping_buffer_for_update();
}
static void
kiblnd_event_handler(struct ib_event_handler *handler, struct ib_event *event)
{
rwlock_t *g_lock = &kiblnd_data.kib_global_lock;
struct kib_hca_dev *hdev;
unsigned long flags;
hdev = container_of(handler, struct kib_hca_dev, ibh_event_handler);
write_lock_irqsave(g_lock, flags);
switch (event->event) {
case IB_EVENT_DEVICE_FATAL:
CDEBUG(D_NET, "IB device fatal\n");
hdev->ibh_state = IBLND_DEV_FATAL;
kiblnd_set_ni_fatal_on(hdev, 1);
break;
case IB_EVENT_PORT_ACTIVE:
CDEBUG(D_NET, "IB port active\n");
if (event->element.port_num == hdev->ibh_port) {
hdev->ibh_state = IBLND_DEV_PORT_ACTIVE;
kiblnd_set_ni_fatal_on(hdev, 0);
}
break;
case IB_EVENT_PORT_ERR:
CDEBUG(D_NET, "IB port err\n");
if (event->element.port_num == hdev->ibh_port) {
hdev->ibh_state = IBLND_DEV_PORT_DOWN;
kiblnd_set_ni_fatal_on(hdev, 1);
}
break;
default:
break;
}
write_unlock_irqrestore(g_lock, flags);
}
static int
kiblnd_hdev_get_attr(struct kib_hca_dev *hdev)
{
struct ib_device_attr *dev_attr = &hdev->ibh_ibdev->attrs;
int rc = 0;
int rc2 = 0;
/* It's safe to assume a HCA can handle a page size
* matching that of the native system
*/
hdev->ibh_page_shift = PAGE_SHIFT;
hdev->ibh_page_size = 1 << PAGE_SHIFT;
hdev->ibh_page_mask = ~((u64)hdev->ibh_page_size - 1);
hdev->ibh_mr_size = dev_attr->max_mr_size;
hdev->ibh_max_qp_wr = dev_attr->max_qp_wr;
/* Setup device Memory Registration capabilities */
#ifdef HAVE_OFED_FMR_POOL_API
#ifdef HAVE_OFED_IB_DEVICE_OPS
if (hdev->ibh_ibdev->ops.alloc_fmr &&
hdev->ibh_ibdev->ops.dealloc_fmr &&
hdev->ibh_ibdev->ops.map_phys_fmr &&
hdev->ibh_ibdev->ops.unmap_fmr) {
#else
if (hdev->ibh_ibdev->alloc_fmr &&
hdev->ibh_ibdev->dealloc_fmr &&
hdev->ibh_ibdev->map_phys_fmr &&
hdev->ibh_ibdev->unmap_fmr) {
#endif
LCONSOLE_INFO("Using FMR for registration\n");
hdev->ibh_dev->ibd_dev_caps |= IBLND_DEV_CAPS_FMR_ENABLED;
} else
#endif /* HAVE_OFED_FMR_POOL_API */
if (dev_attr->device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS) {
LCONSOLE_INFO("Using FastReg for registration\n");
hdev->ibh_dev->ibd_dev_caps |= IBLND_DEV_CAPS_FASTREG_ENABLED;
if (dev_attr->device_cap_flags & IBK_SG_GAPS_REG)
hdev->ibh_dev->ibd_dev_caps |=
IBLND_DEV_CAPS_FASTREG_GAPS_SUPPORT;
} else {
rc = -ENOSYS;
}
rc2 = kiblnd_port_get_attr(hdev);
if (rc2 != 0)
return rc2;
if (rc != 0)
rc = -EINVAL;
if (rc == -ENOSYS)
CERROR("IB device does not support FMRs nor FastRegs, can't register memory: rc = %d\n", rc);
else if (rc == -EINVAL)
CERROR("Invalid mr size: %#llx\n", hdev->ibh_mr_size);
return rc;
}
void
kiblnd_hdev_destroy(struct kib_hca_dev *hdev)
{
if (hdev->ibh_event_handler.device != NULL)
ib_unregister_event_handler(&hdev->ibh_event_handler);
if (hdev->ibh_pd != NULL)
ib_dealloc_pd(hdev->ibh_pd);
if (hdev->ibh_cmid != NULL)
rdma_destroy_id(hdev->ibh_cmid);
LIBCFS_FREE(hdev, sizeof(*hdev));
}
static int
kiblnd_dummy_callback(struct rdma_cm_id *cmid, struct rdma_cm_event *event)
{
/* DUMMY */
return 0;
}
static int
kiblnd_dev_need_failover(struct kib_dev *dev, struct net *ns)
{
struct rdma_cm_id *cmid;
struct sockaddr_storage srcaddr;
struct sockaddr dstaddr;
int rc;
if (dev->ibd_hdev == NULL || /* initializing */
dev->ibd_hdev->ibh_cmid == NULL || /* listener is dead */
*kiblnd_tunables.kib_dev_failover > 1) /* debugging */
return 1;
/* XXX: it's UGLY, but I don't have better way to find
* ib-bonding HCA failover because:
*
* a. no reliable CM event for HCA failover...
* b. no OFED API to get ib_device for current net_device...
*
* We have only two choices at this point:
*
* a. rdma_bind_addr(), it will conflict with listener cmid
* b. rdma_resolve_addr() to zero addr
*/
cmid = rdma_create_id(ns, kiblnd_dummy_callback, dev,
RDMA_PS_TCP, IB_QPT_RC);
if (IS_ERR(cmid)) {
rc = PTR_ERR(cmid);
CERROR("Failed to create cmid for failover: %d\n", rc);
return rc;
}
memcpy(&srcaddr, &dev->ibd_addr, sizeof(struct sockaddr_storage));
memset(&dstaddr, 0, sizeof(dstaddr));
dstaddr.sa_family = dev->ibd_addr.ss_family;
rc = rdma_resolve_addr(cmid, (struct sockaddr *)&srcaddr, &dstaddr, 1);
if (rc != 0 || cmid->device == NULL) {
CERROR("Failed to bind %s:%pISc to device(%p): %d\n",
dev->ibd_ifname, &dev->ibd_addr,
cmid->device, rc);
rdma_destroy_id(cmid);
return rc;
}
rc = dev->ibd_hdev->ibh_ibdev != cmid->device; /* true for failover */
rdma_destroy_id(cmid);
return rc;
}
int
kiblnd_dev_failover(struct kib_dev *dev, struct net *ns)
{
LIST_HEAD(zombie_tpo);
LIST_HEAD(zombie_ppo);
LIST_HEAD(zombie_fpo);
struct rdma_cm_id *cmid = NULL;
struct kib_hca_dev *hdev = NULL;
struct kib_hca_dev *old;
struct ib_pd *pd;
struct kib_net *net;
struct sockaddr_storage addr;
struct net_device *netdev;
unsigned long flags;
int rc = 0;
int i;
bool set_fatal = true;
LASSERT(*kiblnd_tunables.kib_dev_failover > 1 ||
dev->ibd_can_failover ||
dev->ibd_hdev == NULL);
rc = kiblnd_dev_need_failover(dev, ns);
if (rc <= 0)
goto out;
if (dev->ibd_hdev != NULL &&
dev->ibd_hdev->ibh_cmid != NULL) {
/* XXX it's not good to close old listener at here,
* because we can fail to create new listener.
* But we have to close it now, otherwise rdma_bind_addr
* will return EADDRINUSE... How crap!
*/
write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
cmid = dev->ibd_hdev->ibh_cmid;
/* make next schedule of kiblnd_dev_need_failover()
* return 1 for me
*/
dev->ibd_hdev->ibh_cmid = NULL;
write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
rdma_destroy_id(cmid);
}
cmid = rdma_create_id(ns, kiblnd_cm_callback, dev, RDMA_PS_TCP,
IB_QPT_RC);
if (IS_ERR(cmid)) {
rc = PTR_ERR(cmid);
CERROR("Failed to create cmid for failover: %d\n", rc);
goto out;
}
memset(&addr, 0, sizeof(addr));
switch (dev->ibd_addr.ss_family) {
case AF_INET6: {
struct sockaddr_in6 *sa = (void *)&addr;
memcpy(&addr, &dev->ibd_addr, sizeof(struct sockaddr_storage));
sa->sin6_port = htons(*kiblnd_tunables.kib_service);
break;
}
case AF_INET: {
struct sockaddr_in *sa = (void *)&addr;
memcpy(&addr, &dev->ibd_addr, sizeof(struct sockaddr_storage));
sa->sin_port = htons(*kiblnd_tunables.kib_service);
break;
}
default:
CERROR("Unsupported family for failover\n");
rc = -EOPNOTSUPP;
break;
}
if (rc < 0)
return rc;
/* Bind to failover device or port */
rc = rdma_bind_addr(cmid, (struct sockaddr *)&addr);
if (rc != 0 || cmid->device == NULL) {
CERROR("Failed to bind %s:%pISc to device(%p): %d\n",
dev->ibd_ifname, &dev->ibd_addr,
cmid->device, rc);
if (!rc && !cmid->device)
set_fatal = false;
rdma_destroy_id(cmid);
goto out;
}
LIBCFS_ALLOC(hdev, sizeof(*hdev));
if (hdev == NULL) {
CERROR("Failed to allocate kib_hca_dev\n");
rdma_destroy_id(cmid);
rc = -ENOMEM;
goto out;
}
atomic_set(&hdev->ibh_ref, 1);
hdev->ibh_dev = dev;
hdev->ibh_cmid = cmid;
hdev->ibh_ibdev = cmid->device;
hdev->ibh_port = cmid->port_num;
pd = ib_alloc_pd(cmid->device, 0);
if (IS_ERR(pd)) {
rc = PTR_ERR(pd);
CERROR("Can't allocate PD: %d\n", rc);
goto out;
}
hdev->ibh_pd = pd;
rc = rdma_listen(cmid, 0);
if (rc != 0) {
CERROR("Can't start new listener: %d\n", rc);
goto out;
}
rc = kiblnd_hdev_get_attr(hdev);
if (rc != 0) {
CERROR("Can't get device attributes: %d\n", rc);
goto out;
}
INIT_IB_EVENT_HANDLER(&hdev->ibh_event_handler,
hdev->ibh_ibdev, kiblnd_event_handler);
ib_register_event_handler(&hdev->ibh_event_handler);
write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
old = dev->ibd_hdev;
dev->ibd_hdev = hdev; /* take over the refcount */
hdev = old;
list_for_each_entry(net, &dev->ibd_nets, ibn_list) {
cfs_cpt_for_each(i, lnet_cpt_table()) {
kiblnd_fail_poolset(&net->ibn_tx_ps[i]->tps_poolset,
&zombie_tpo);
if (net->ibn_fmr_ps != NULL)
kiblnd_fail_fmr_poolset(net->ibn_fmr_ps[i],
&zombie_fpo);
}
}
write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
out:
if (!list_empty(&zombie_tpo))
kiblnd_destroy_pool_list(&zombie_tpo);
if (!list_empty(&zombie_ppo))
kiblnd_destroy_pool_list(&zombie_ppo);
if (!list_empty(&zombie_fpo))
kiblnd_destroy_fmr_pool_list(&zombie_fpo);
if (hdev != NULL)
kiblnd_hdev_decref(hdev);
if (rc != 0) {
dev->ibd_failed_failover++;
} else {
dev->ibd_failed_failover = 0;
if (set_fatal) {
netdev = dev_get_by_name(ns, dev->ibd_ifname);
if (netdev && (lnet_get_link_status(netdev) == 1))
kiblnd_set_ni_fatal_on(dev->ibd_hdev, 0);
dev_put(netdev);
}
}
return rc;
}
void
kiblnd_destroy_dev(struct kib_dev *dev)
{
LASSERT(dev->ibd_nnets == 0);
LASSERT(list_empty(&dev->ibd_nets));
list_del(&dev->ibd_fail_list);
list_del(&dev->ibd_list);
if (dev->ibd_hdev != NULL)
kiblnd_hdev_decref(dev->ibd_hdev);
LIBCFS_FREE(dev, sizeof(*dev));
}
static struct kib_dev *
kiblnd_dev_search(char *ifname)
{
struct kib_dev *alias = NULL;
struct kib_dev *dev;
char *colon;
char *colon2;
colon = strchr(ifname, ':');
list_for_each_entry(dev, &kiblnd_data.kib_devs, ibd_list) {
if (strcmp(&dev->ibd_ifname[0], ifname) == 0)
return dev;
if (alias != NULL)
continue;
colon2 = strchr(dev->ibd_ifname, ':');
if (colon != NULL)
*colon = 0;
if (colon2 != NULL)
*colon2 = 0;
if (strcmp(&dev->ibd_ifname[0], ifname) == 0)
alias = dev;
if (colon != NULL)
*colon = ':';
if (colon2 != NULL)
*colon2 = ':';
}
return alias;
}
static int
kiblnd_handle_link_state_change(struct net_device *dev,
unsigned char operstate)
{
struct lnet_ni *ni = NULL;
struct kib_dev *event_kibdev;
struct kib_net *net;
struct kib_net *cnxt;
bool link_down = !(operstate == IF_OPER_UP);
bool found_ip = false;
u32 ni_state_before;
bool update_ping_buf = false;
int state;
event_kibdev = kiblnd_dev_search(dev->name);
if (!event_kibdev)
goto out;
list_for_each_entry_safe(net, cnxt, &event_kibdev->ibd_nets, ibn_list) {
found_ip = false;
ni = net->ibn_ni;
if (nid_is_nid4(&ni->ni_nid)) {
struct in_device *in_dev = __in_dev_get_rtnl(dev);
DECLARE_CONST_IN_IFADDR(ifa);
if (!in_dev) {
CDEBUG(D_NET, "Interface %s has no IPv4 status.\n",
dev->name);
ni_state_before = lnet_set_link_fatal_state(ni, 1);
goto ni_done;
}
in_dev_for_each_ifa_rtnl(ifa, in_dev) {
if (ifa->ifa_local == ni->ni_nid.nid_addr[0])
found_ip = true;
}
endfor_ifa(in_dev);
#if IS_ENABLED(CONFIG_IPV6)
} else {
struct inet6_dev *in6_dev = __in6_dev_get(dev);
const struct inet6_ifaddr *ifa6;
struct in6_addr sin6_addr;
if (!in6_dev) {
CDEBUG(D_NET, "Interface %s has no IPv6 status.\n",
dev->name);
ni_state_before = lnet_set_link_fatal_state(ni, 1);
goto ni_done;
}
memcpy(&sin6_addr, &ni->ni_nid.nid_addr, sizeof(sin6_addr));
rcu_read_lock();
list_for_each_entry_rcu(ifa6, &in6_dev->addr_list,
if_list) {
if (!ipv6_addr_cmp(&ifa6->addr, &sin6_addr))
found_ip = true;
}
rcu_read_unlock();
#endif
}
if (!found_ip) {
CDEBUG(D_NET, "Interface %s has no matching ip\n",
dev->name);
ni_state_before = lnet_set_link_fatal_state(ni, 1);
goto ni_done;
}
if (link_down) {
ni_state_before = lnet_set_link_fatal_state(ni, 1);
} else {
state = (lnet_get_link_status_locked(dev) == 0);
ni_state_before = lnet_set_link_fatal_state(ni,
state);
}
ni_done:
if (!update_ping_buf &&
(ni->ni_state == LNET_NI_STATE_ACTIVE) &&
(atomic_read(&ni->ni_fatal_error_on) != ni_state_before) &&
(net->ibn_init == IBLND_INIT_ALL))
update_ping_buf = true;
}
if (update_ping_buf)
lnet_mark_ping_buffer_for_update();
out:
return 0;
}
static int
kiblnd_handle_inetaddr_change(struct net_device *dev, unsigned long event, int family)
{
struct kib_dev *event_kibdev;
struct kib_net *net;
struct kib_net *cnxt;
u32 ni_state_before;
bool update_ping_buf = false;
struct lnet_ni *ni = NULL;
bool link_down;
event_kibdev = kiblnd_dev_search(dev->name);
if (!event_kibdev)
goto out;
list_for_each_entry_safe(net, cnxt, &event_kibdev->ibd_nets,
ibn_list) {
ni = net->ibn_ni;
if (nid_is_nid4(&ni->ni_nid) ^ (family == AF_INET))
continue;
link_down = (event == NETDEV_DOWN);
ni_state_before = lnet_set_link_fatal_state(ni, link_down);
if (!update_ping_buf &&
(ni->ni_state == LNET_NI_STATE_ACTIVE) &&
((event == NETDEV_DOWN) != ni_state_before) &&
(net->ibn_init == IBLND_INIT_ALL))
update_ping_buf = true;
}
if (update_ping_buf)
lnet_mark_ping_buffer_for_update();
out:
return 0;
}
/************************************
* Net device notifier event handler
************************************/
static int kiblnd_device_event(struct notifier_block *unused,
unsigned long event, void *ptr)
{
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
unsigned char operstate;
operstate = dev->operstate;
CDEBUG(D_NET, "devevent: status=%s, iface=%s ifindex %d state %u\n",
netdev_cmd_to_name(event), dev->name, dev->ifindex, operstate);
switch (event) {
case NETDEV_UP:
case NETDEV_DOWN:
case NETDEV_CHANGE:
kiblnd_handle_link_state_change(dev, operstate);
break;
}
return NOTIFY_OK;
}
/************************************
* Inetaddr notifier event handler
************************************/
static int kiblnd_inetaddr_event(struct notifier_block *unused,
unsigned long event, void *ptr)
{
struct in_ifaddr *ifa = ptr;
CDEBUG(D_NET, "addrevent: status %s ip addr %pI4, netmask %pI4.\n",
netdev_cmd_to_name(event), &ifa->ifa_address, &ifa->ifa_mask);
switch (event) {
case NETDEV_UP:
case NETDEV_DOWN:
case NETDEV_CHANGE:
kiblnd_handle_inetaddr_change(ifa->ifa_dev->dev, event,
AF_INET);
break;
}
return NOTIFY_OK;
}
static struct notifier_block kiblnd_dev_notifier_block = {
.notifier_call = kiblnd_device_event,
};
static struct notifier_block kiblnd_inetaddr_notifier_block = {
.notifier_call = kiblnd_inetaddr_event,
};
#if IS_ENABLED(CONFIG_IPV6)
static int kiblnd_inet6addr_event(struct notifier_block *this,
unsigned long event, void *ptr)
{
struct inet6_ifaddr *ifa6 = ptr;
CDEBUG(D_NET, "addrevent: status %s ip addr %pISc\n",
netdev_cmd_to_name(event), &ifa6->addr);
switch (event) {
case NETDEV_UP:
case NETDEV_DOWN:
case NETDEV_CHANGE:
kiblnd_handle_inetaddr_change(ifa6->idev->dev, event,
AF_INET6);
break;
}
return NOTIFY_OK;
}
static struct notifier_block kiblnd_inet6addr_notifier_block = {
.notifier_call = kiblnd_inet6addr_event,
};
#endif
static void
kiblnd_base_shutdown(void)
{
struct kib_sched_info *sched;
struct kib_peer_ni *peer_ni;
int i;
LASSERT(list_empty(&kiblnd_data.kib_devs));
CDEBUG(D_MALLOC, "before LND base cleanup: kmem %lld\n",
libcfs_kmem_read());
if (kiblnd_data.kib_init == IBLND_INIT_ALL) {
unregister_netdevice_notifier(&kiblnd_dev_notifier_block);
unregister_inetaddr_notifier(&kiblnd_inetaddr_notifier_block);
#if IS_ENABLED(CONFIG_IPV6)
unregister_inet6addr_notifier(&kiblnd_inet6addr_notifier_block);
#endif
}
switch (kiblnd_data.kib_init) {
default:
LBUG();
case IBLND_INIT_ALL:
case IBLND_INIT_DATA:
hash_for_each(kiblnd_data.kib_peers, i, peer_ni, ibp_list)
LASSERT(0);
LASSERT(list_empty(&kiblnd_data.kib_connd_zombies));
LASSERT(list_empty(&kiblnd_data.kib_connd_conns));
LASSERT(list_empty(&kiblnd_data.kib_reconn_list));
LASSERT(list_empty(&kiblnd_data.kib_reconn_wait));
/* flag threads to terminate; wake and wait for them to die */
kiblnd_data.kib_shutdown = 1;
/* NB: we really want to stop scheduler threads net by net
* instead of the whole module, this should be improved
* with dynamic configuration LNet.
*/
cfs_percpt_for_each(sched, i, kiblnd_data.kib_scheds)
wake_up_all(&sched->ibs_waitq);
wake_up(&kiblnd_data.kib_connd_waitq);
wake_up(&kiblnd_data.kib_failover_waitq);
wait_var_event_warning(&kiblnd_data.kib_nthreads,
!atomic_read(&kiblnd_data.kib_nthreads),
"Waiting for %d threads to terminate\n",
atomic_read(&kiblnd_data.kib_nthreads));
fallthrough;
case IBLND_INIT_NOTHING:
break;
}
if (kiblnd_data.kib_scheds != NULL)
cfs_percpt_free(kiblnd_data.kib_scheds);
CDEBUG(D_MALLOC, "after LND base cleanup: kmem %lld\n",
libcfs_kmem_read());
kiblnd_data.kib_init = IBLND_INIT_NOTHING;
module_put(THIS_MODULE);
}
static void
kiblnd_shutdown(struct lnet_ni *ni)
{
struct kib_net *net = ni->ni_data;
rwlock_t *g_lock = &kiblnd_data.kib_global_lock;
unsigned long flags;
LASSERT(kiblnd_data.kib_init == IBLND_INIT_ALL);
if (net == NULL)
goto out;
CDEBUG(D_MALLOC, "before LND net cleanup: kmem %lld\n",
libcfs_kmem_read());
write_lock_irqsave(g_lock, flags);
net->ibn_shutdown = 1;
write_unlock_irqrestore(g_lock, flags);
switch (net->ibn_init) {
default:
LBUG();
case IBLND_INIT_ALL:
/* nuke all existing peers within this net */
kiblnd_del_peer(ni, &LNET_ANY_NID);
/* Wait for all peer_ni state to clean up */
wait_var_event_warning(&net->ibn_npeers,
atomic_read(&net->ibn_npeers) == 0,
"%s: waiting for %d peers to disconnect\n",
libcfs_nidstr(&ni->ni_nid),
atomic_read(&net->ibn_npeers));
write_lock_irqsave(g_lock, flags);
LASSERT(net->ibn_dev->ibd_nnets > 0);
net->ibn_dev->ibd_nnets--;
list_del(&net->ibn_list);
write_unlock_irqrestore(g_lock, flags);
wake_up_all(&kiblnd_data.kib_connd_waitq);
wait_var_event_warning(&net->ibn_nconns,
atomic_read(&net->ibn_nconns) == 0,
"%s: waiting for %d conns to clean\n",
libcfs_nidstr(&ni->ni_nid),
atomic_read(&net->ibn_nconns));
kiblnd_net_fini_pools(net);
fallthrough;
case IBLND_INIT_NOTHING:
LASSERT(atomic_read(&net->ibn_nconns) == 0);
if (net->ibn_dev != NULL && net->ibn_dev->ibd_nnets == 0)
kiblnd_destroy_dev(net->ibn_dev);
break;
}
CDEBUG(D_MALLOC, "after LND net cleanup: kmem %lld\n",
libcfs_kmem_read());
net->ibn_init = IBLND_INIT_NOTHING;
ni->ni_data = NULL;
LIBCFS_FREE(net, sizeof(*net));
out:
if (list_empty(&kiblnd_data.kib_devs))
kiblnd_base_shutdown();
}
static int
kiblnd_base_startup(struct net *ns)
{
struct kib_sched_info *sched;
int rc;
int i;
LASSERT(kiblnd_data.kib_init == IBLND_INIT_NOTHING);
if (!try_module_get(THIS_MODULE))
goto failed;
memset(&kiblnd_data, 0, sizeof(kiblnd_data)); /* zero pointers, flags etc */
rwlock_init(&kiblnd_data.kib_global_lock);
INIT_LIST_HEAD(&kiblnd_data.kib_devs);
INIT_LIST_HEAD(&kiblnd_data.kib_failed_devs);
hash_init(kiblnd_data.kib_peers);
spin_lock_init(&kiblnd_data.kib_connd_lock);
INIT_LIST_HEAD(&kiblnd_data.kib_connd_conns);
INIT_LIST_HEAD(&kiblnd_data.kib_connd_zombies);
INIT_LIST_HEAD(&kiblnd_data.kib_reconn_list);
INIT_LIST_HEAD(&kiblnd_data.kib_reconn_wait);
init_waitqueue_head(&kiblnd_data.kib_connd_waitq);
init_waitqueue_head(&kiblnd_data.kib_failover_waitq);
kiblnd_data.kib_scheds = cfs_percpt_alloc(lnet_cpt_table(),
sizeof(*sched));
if (kiblnd_data.kib_scheds == NULL)
goto failed;
cfs_percpt_for_each(sched, i, kiblnd_data.kib_scheds) {
int nthrs;
spin_lock_init(&sched->ibs_lock);
INIT_LIST_HEAD(&sched->ibs_conns);
init_waitqueue_head(&sched->ibs_waitq);
nthrs = cfs_cpt_weight(lnet_cpt_table(), i);
if (*kiblnd_tunables.kib_nscheds > 0) {
nthrs = min(nthrs, *kiblnd_tunables.kib_nscheds);
} else {
/* max to half of CPUs, another half is reserved for
* upper layer modules
*/
nthrs = min(max(IBLND_N_SCHED, nthrs >> 1), nthrs);
}
sched->ibs_nthreads_max = nthrs;
sched->ibs_cpt = i;
}
kiblnd_data.kib_error_qpa.qp_state = IB_QPS_ERR;
/* lists/ptrs/locks initialised */
kiblnd_data.kib_init = IBLND_INIT_DATA;
/*****************************************************/
rc = kiblnd_thread_start(kiblnd_connd, NULL, "kiblnd_connd");
if (rc != 0) {
CERROR("Can't spawn o2iblnd connd: %d\n", rc);
goto failed;
}
if (*kiblnd_tunables.kib_dev_failover != 0)
rc = kiblnd_thread_start(kiblnd_failover_thread, ns,
"kiblnd_failover");
if (rc != 0) {
CERROR("Can't spawn o2iblnd failover thread: %d\n", rc);
goto failed;
}
register_netdevice_notifier(&kiblnd_dev_notifier_block);
register_inetaddr_notifier(&kiblnd_inetaddr_notifier_block);
#if IS_ENABLED(CONFIG_IPV6)
register_inet6addr_notifier(&kiblnd_inet6addr_notifier_block);
#endif
/* flag everything initialised */
kiblnd_data.kib_init = IBLND_INIT_ALL;
/*****************************************************/
return 0;
failed:
kiblnd_base_shutdown();
return -ENETDOWN;
}
static int
kiblnd_start_schedulers(struct kib_sched_info *sched)
{
int rc = 0;
int nthrs;
int i;
if (sched->ibs_nthreads == 0) {
if (*kiblnd_tunables.kib_nscheds > 0) {
nthrs = sched->ibs_nthreads_max;
} else {
nthrs = cfs_cpt_weight(lnet_cpt_table(),
sched->ibs_cpt);
nthrs = min(max(IBLND_N_SCHED, nthrs >> 1), nthrs);
nthrs = min(IBLND_N_SCHED_HIGH, nthrs);
}
} else {
LASSERT(sched->ibs_nthreads <= sched->ibs_nthreads_max);
/* increase one thread if there is new interface */
nthrs = (sched->ibs_nthreads < sched->ibs_nthreads_max);
}
for (i = 0; i < nthrs; i++) {
long id = KIB_THREAD_ID(sched->ibs_cpt, sched->ibs_nthreads + i);
rc = kiblnd_thread_start(kiblnd_scheduler, (void *)id,
"kiblnd_sd_%02ld_%02ld",
KIB_THREAD_CPT(id), KIB_THREAD_TID(id));
if (rc == 0)
continue;
CERROR("Can't spawn thread %d for scheduler[%d]: %d\n",
sched->ibs_cpt, sched->ibs_nthreads + i, rc);
break;
}
sched->ibs_nthreads += i;
return rc;
}
static int kiblnd_dev_start_threads(struct kib_dev *dev, bool newdev, u32 *cpts,
int ncpts)
{
int cpt;
int rc;
int i;
for (i = 0; i < ncpts; i++) {
struct kib_sched_info *sched;
cpt = (cpts == NULL) ? i : cpts[i];
sched = kiblnd_data.kib_scheds[cpt];
if (!newdev && sched->ibs_nthreads > 0)
continue;
rc = kiblnd_start_schedulers(kiblnd_data.kib_scheds[cpt]);
if (rc != 0) {
CERROR("Failed to start scheduler threads for %s\n",
dev->ibd_ifname);
return rc;
}
}
return 0;
}
static int
kiblnd_startup(struct lnet_ni *ni)
{
char *ifname = NULL;
struct lnet_inetdev *ifaces = NULL;
struct sockaddr_storage addr;
struct kib_dev *ibdev = NULL;
struct kib_net *net = NULL;
unsigned long flags;
int rc;
int i;
bool newdev;
struct net_device *netdev;
LASSERT(ni->ni_net->net_lnd == &the_o2iblnd);
if (kiblnd_data.kib_init == IBLND_INIT_NOTHING) {
rc = kiblnd_base_startup(ni->ni_net_ns);
if (rc != 0)
return rc;
}
LIBCFS_ALLOC(net, sizeof(*net));
ni->ni_data = net;
if (net == NULL) {
rc = -ENOMEM;
goto failed;
}
net->ibn_ni = ni;
net->ibn_incarnation = ktime_get_real_ns() / NSEC_PER_USEC;
/* if there was no tunables specified, setup the tunables to be
* defaulted
*/
if (!ni->ni_lnd_tunables_set)
memcpy(&ni->ni_lnd_tunables.lnd_tun_u.lnd_o2ib,
&kib_default_tunables, sizeof(kib_default_tunables));
rc = kiblnd_tunables_setup(&ni->ni_lnd_tunables,
&ni->ni_net->net_tunables);
if (rc < 0)
goto failed;
/* Multi-Rail wants each secondary
* IP to be treated as an unique 'struct ni' interface.
*/
if (ni->ni_interface != NULL) {
/* Use the IPoIB interface specified in 'networks=' */
ifname = ni->ni_interface;
} else {
ifname = *kiblnd_tunables.kib_default_ipif;
rc = libcfs_strnid(&ni->ni_nid, ifname);
if (rc < 0 || ni->ni_nid.nid_type != O2IBLND)
memset(&ni->ni_nid, 0, sizeof(ni->ni_nid));
}
if (strlen(ifname) >= sizeof(ibdev->ibd_ifname)) {
CERROR("IPoIB interface name too long: %s\n", ifname);
rc = -E2BIG;
goto failed;
}
rc = lnet_inet_enumerate(&ifaces, ni->ni_net_ns,
the_lnet.ln_nis_use_large_nids);
if (rc < 0)
goto failed;
i = lnet_inet_select(ni, ifaces, rc);
if (i < 0)
goto failed;
if (nid_addr_is_set(&ni->ni_nid)) {
strscpy(ifname, ifaces[i].li_name, sizeof(ifname));
} else if (strcmp(ifname, ifaces[i].li_name) != 0) {
CERROR("ko2iblnd: No matching interfaces\n");
rc = -ENOENT;
goto failed;
}
memset(&addr, 0, sizeof(addr));
if (ifaces[i].li_size == sizeof(struct in6_addr)) {
struct sockaddr_in6 *sa = (void *)&addr;
sa->sin6_family = AF_INET6;
memcpy(&sa->sin6_addr, ifaces[i].li_ipv6addr,
sizeof(struct in6_addr));
ni->ni_nid.nid_size = sizeof(struct in6_addr) - 4;
memcpy(&ni->ni_nid.nid_addr, ifaces[i].li_ipv6addr,
sizeof(struct in6_addr));
} else {
struct sockaddr_in *sa = (void *)&addr;
sa->sin_family = AF_INET;
sa->sin_addr.s_addr = ifaces[i].li_ipaddr;
ni->ni_nid.nid_size = 0;
ni->ni_nid.nid_addr[0] = sa->sin_addr.s_addr;
}
ibdev = kiblnd_dev_search(ifname);
newdev = ibdev == NULL;
/* hmm...create kib_dev even for alias */
if (ibdev == NULL || strcmp(&ibdev->ibd_ifname[0], ifname) != 0) {
LIBCFS_ALLOC(ibdev, sizeof(*ibdev));
if (!ibdev) {
rc = -ENOMEM;
goto failed;
}
strscpy(ibdev->ibd_ifname, ifaces[i].li_name,
sizeof(ibdev->ibd_ifname));
ibdev->ibd_can_failover = ifaces[i].li_iff_master;
memcpy(&ibdev->ibd_addr, &addr, sizeof(addr));
INIT_LIST_HEAD(&ibdev->ibd_nets);
INIT_LIST_HEAD(&ibdev->ibd_list); /* not yet in kib_devs */
INIT_LIST_HEAD(&ibdev->ibd_fail_list);
/* initialize the device */
rc = kiblnd_dev_failover(ibdev, ni->ni_net_ns);
if (rc) {
CERROR("ko2iblnd: Can't initialize device: rc = %d\n",
rc);
goto failed;
}
list_add_tail(&ibdev->ibd_list, &kiblnd_data.kib_devs);
}
net->ibn_dev = ibdev;
if (!ni->ni_interface || !strlen(ni->ni_interface)) {
rc = lnet_ni_add_interface(ni, ifaces[i].li_name);
if (rc < 0)
CWARN("ko2iblnd failed to allocate ni_interface\n");
}
ni->ni_dev_cpt = ifaces[i].li_cpt;
rc = kiblnd_dev_start_threads(ibdev, newdev, ni->ni_cpts, ni->ni_ncpts);
if (rc != 0)
goto failed;
rc = kiblnd_net_init_pools(net, ni, ni->ni_cpts, ni->ni_ncpts);
if (rc != 0) {
CERROR("Failed to initialize NI pools: %d\n", rc);
goto failed;
}
write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
ibdev->ibd_nnets++;
list_add_tail(&net->ibn_list, &ibdev->ibd_nets);
/* for health check */
if (ibdev->ibd_hdev->ibh_state == IBLND_DEV_PORT_DOWN)
kiblnd_set_ni_fatal_on(ibdev->ibd_hdev, 1);
netdev = dev_get_by_name(ni->ni_net_ns, net->ibn_dev->ibd_ifname);
if (netdev &&
((netdev->reg_state == NETREG_UNREGISTERING) ||
(netdev->operstate != IF_OPER_UP) ||
(lnet_get_link_status(netdev) == 0))) {
kiblnd_set_ni_fatal_on(ibdev->ibd_hdev, 1);
}
dev_put(netdev);
write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
net->ibn_init = IBLND_INIT_ALL;
kfree(ifaces);
return 0;
failed:
if (net != NULL && net->ibn_dev == NULL && ibdev != NULL)
kiblnd_destroy_dev(ibdev);
kfree(ifaces);
kiblnd_shutdown(ni);
CDEBUG(D_NET, "Configuration of device %s failed: rc = %d\n",
ifname ? ifname : "", rc);
return -ENETDOWN;
}
static const struct lnet_lnd the_o2iblnd = {
.lnd_type = O2IBLND,
.lnd_startup = kiblnd_startup,
.lnd_shutdown = kiblnd_shutdown,
.lnd_ctl = kiblnd_ctl,
.lnd_send = kiblnd_send,
.lnd_recv = kiblnd_recv,
.lnd_get_dev_prio = kiblnd_get_dev_prio,
.lnd_tun_defaults = kiblnd_tun_defaults,
.lnd_nl_get = kiblnd_nl_get,
.lnd_nl_set = kiblnd_nl_set,
.lnd_get_timeout = kiblnd_timeout,
.lnd_keys = &kiblnd_tunables_keys,
};
static void ko2inlnd_assert_wire_constants(void)
{
BUILD_BUG_ON(IBLND_MSG_MAGIC != 0x0be91b91);
BUILD_BUG_ON(IBLND_MSG_VERSION_1 != 0x11);
BUILD_BUG_ON(IBLND_MSG_VERSION_2 != 0x12);
BUILD_BUG_ON(IBLND_MSG_VERSION != IBLND_MSG_VERSION_2);
BUILD_BUG_ON(IBLND_MSG_CONNREQ != 0xc0);
BUILD_BUG_ON(IBLND_MSG_CONNACK != 0xc1);
BUILD_BUG_ON(IBLND_MSG_NOOP != 0xd0);
BUILD_BUG_ON(IBLND_MSG_IMMEDIATE != 0xd1);
BUILD_BUG_ON(IBLND_MSG_PUT_REQ != 0xd2);
BUILD_BUG_ON(IBLND_MSG_PUT_NAK != 0xd3);
BUILD_BUG_ON(IBLND_MSG_PUT_ACK != 0xd4);
BUILD_BUG_ON(IBLND_MSG_PUT_DONE != 0xd5);
BUILD_BUG_ON(IBLND_MSG_GET_REQ != 0xd6);
BUILD_BUG_ON(IBLND_MSG_GET_DONE != 0xd7);
BUILD_BUG_ON(IBLND_REJECT_CONN_RACE != 1);
BUILD_BUG_ON(IBLND_REJECT_NO_RESOURCES != 2);
BUILD_BUG_ON(IBLND_REJECT_FATAL != 3);
BUILD_BUG_ON(IBLND_REJECT_CONN_UNCOMPAT != 4);
BUILD_BUG_ON(IBLND_REJECT_CONN_STALE != 5);
BUILD_BUG_ON(IBLND_REJECT_RDMA_FRAGS != 6);
BUILD_BUG_ON(IBLND_REJECT_MSG_QUEUE_SIZE != 7);
BUILD_BUG_ON(IBLND_REJECT_INVALID_SRV_ID != 8);
BUILD_BUG_ON((int)sizeof(struct kib_connparams) != 8);
BUILD_BUG_ON((int)offsetof(struct kib_connparams, ibcp_queue_depth) != 0);
BUILD_BUG_ON((int)sizeof(((struct kib_connparams *)0)->ibcp_queue_depth) != 2);
BUILD_BUG_ON((int)offsetof(struct kib_connparams, ibcp_max_frags) != 2);
BUILD_BUG_ON((int)sizeof(((struct kib_connparams *)0)->ibcp_max_frags) != 2);
BUILD_BUG_ON((int)offsetof(struct kib_connparams, ibcp_max_msg_size) != 4);
BUILD_BUG_ON((int)sizeof(((struct kib_connparams *)0)->ibcp_max_msg_size) != 4);
BUILD_BUG_ON((int)sizeof(struct kib_immediate_msg) != 72);
BUILD_BUG_ON((int)offsetof(struct kib_immediate_msg, ibim_hdr) != 0);
BUILD_BUG_ON((int)sizeof(((struct kib_immediate_msg *)0)->ibim_hdr) != 72);
BUILD_BUG_ON((int)offsetof(struct kib_immediate_msg, ibim_payload) != 72);
BUILD_BUG_ON((int)sizeof(*((struct kib_immediate_msg *)0)->ibim_payload) != 1);
BUILD_BUG_ON((int)sizeof(struct kib_rdma_frag) != 12);
BUILD_BUG_ON((int)offsetof(struct kib_rdma_frag, rf_nob) != 0);
BUILD_BUG_ON((int)sizeof(((struct kib_rdma_frag *)0)->rf_nob) != 4);
BUILD_BUG_ON((int)offsetof(struct kib_rdma_frag, rf_addr) != 4);
BUILD_BUG_ON((int)sizeof(((struct kib_rdma_frag *)0)->rf_addr) != 8);
BUILD_BUG_ON((int)sizeof(struct kib_rdma_desc) != 8);
BUILD_BUG_ON((int)offsetof(struct kib_rdma_desc, rd_key) != 0);
BUILD_BUG_ON((int)sizeof(((struct kib_rdma_desc *)0)->rd_key) != 4);
BUILD_BUG_ON((int)offsetof(struct kib_rdma_desc, rd_nfrags) != 4);
BUILD_BUG_ON((int)sizeof(((struct kib_rdma_desc *)0)->rd_nfrags) != 4);
BUILD_BUG_ON((int)offsetof(struct kib_rdma_desc, rd_frags) != 8);
BUILD_BUG_ON((int)sizeof(*((struct kib_rdma_desc *)0)->rd_frags) != 12);
BUILD_BUG_ON((int)sizeof(struct kib_putreq_msg) != 80);
BUILD_BUG_ON((int)offsetof(struct kib_putreq_msg, ibprm_hdr) != 0);
BUILD_BUG_ON((int)sizeof(((struct kib_putreq_msg *)0)->ibprm_hdr) != 72);
BUILD_BUG_ON((int)offsetof(struct kib_putreq_msg, ibprm_cookie) != 72);
BUILD_BUG_ON((int)sizeof(((struct kib_putreq_msg *)0)->ibprm_cookie) != 8);
BUILD_BUG_ON((int)sizeof(struct kib_putack_msg) != 24);
BUILD_BUG_ON((int)offsetof(struct kib_putack_msg, ibpam_src_cookie) != 0);
BUILD_BUG_ON((int)sizeof(((struct kib_putack_msg *)0)->ibpam_src_cookie) != 8);
BUILD_BUG_ON((int)offsetof(struct kib_putack_msg, ibpam_dst_cookie) != 8);
BUILD_BUG_ON((int)sizeof(((struct kib_putack_msg *)0)->ibpam_dst_cookie) != 8);
BUILD_BUG_ON((int)offsetof(struct kib_putack_msg, ibpam_rd) != 16);
BUILD_BUG_ON((int)sizeof(((struct kib_putack_msg *)0)->ibpam_rd) != 8);
BUILD_BUG_ON((int)sizeof(struct kib_get_msg) != 88);
BUILD_BUG_ON((int)offsetof(struct kib_get_msg, ibgm_hdr) != 0);
BUILD_BUG_ON((int)sizeof(((struct kib_get_msg *)0)->ibgm_hdr) != 72);
BUILD_BUG_ON((int)offsetof(struct kib_get_msg, ibgm_cookie) != 72);
BUILD_BUG_ON((int)sizeof(((struct kib_get_msg *)0)->ibgm_cookie) != 8);
BUILD_BUG_ON((int)offsetof(struct kib_get_msg, ibgm_rd) != 80);
BUILD_BUG_ON((int)sizeof(((struct kib_get_msg *)0)->ibgm_rd) != 8);
BUILD_BUG_ON((int)sizeof(struct kib_completion_msg) != 12);
BUILD_BUG_ON((int)offsetof(struct kib_completion_msg, ibcm_cookie) != 0);
BUILD_BUG_ON((int)sizeof(((struct kib_completion_msg *)0)->ibcm_cookie) != 8);
BUILD_BUG_ON((int)offsetof(struct kib_completion_msg, ibcm_status) != 8);
BUILD_BUG_ON((int)sizeof(((struct kib_completion_msg *)0)->ibcm_status) != 4);
/* Checks for struct kib_msg */
//BUILD_BUG_ON((int)sizeof(struct kib_msg) != 12);
BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_magic) != 0);
BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_magic) != 4);
BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_version) != 4);
BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_version) != 2);
BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_type) != 6);
BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_type) != 1);
BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_credits) != 7);
BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_credits) != 1);
BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_nob) != 8);
BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_nob) != 4);
BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_cksum) != 12);
BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_cksum) != 4);
BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_srcnid) != 16);
BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_srcnid) != 8);
BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_srcstamp) != 24);
BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_srcstamp) != 8);
BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_dstnid) != 32);
BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_dstnid) != 8);
BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_dststamp) != 40);
BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_dststamp) != 8);
/* Connparams */
BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.connparams.ibcp_queue_depth) != 48);
BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.connparams.ibcp_queue_depth) != 2);
BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.connparams.ibcp_max_frags) != 50);
BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.connparams.ibcp_max_frags) != 2);
BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.connparams.ibcp_max_msg_size) != 52);
BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.connparams.ibcp_max_msg_size) != 4);
/* Immediate message */
BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.immediate.ibim_hdr) != 48);
BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.immediate.ibim_hdr) != 72);
BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.immediate.ibim_payload) != 120);
BUILD_BUG_ON((int)sizeof(*((struct kib_msg *)0)->ibm_u.immediate.ibim_payload) != 1);
/* PUT req message */
BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.putreq.ibprm_hdr) != 48);
BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.putreq.ibprm_hdr) != 72);
BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.putreq.ibprm_cookie) != 120);
BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.putreq.ibprm_cookie) != 8);
/* Put ACK */
BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.putack.ibpam_src_cookie) != 48);
BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.putack.ibpam_src_cookie) != 8);
BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.putack.ibpam_dst_cookie) != 56);
BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.putack.ibpam_dst_cookie) != 8);
BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.putack.ibpam_rd) != 64);
BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.putack.ibpam_rd) != 8);
/* GET message */
BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.get.ibgm_hdr) != 48);
BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.get.ibgm_hdr) != 72);
BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.get.ibgm_cookie) != 120);
BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.get.ibgm_cookie) != 8);
BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.get.ibgm_rd) != 128);
BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.get.ibgm_rd) != 8);
/* Completion message */
BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.completion.ibcm_cookie) != 48);
BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.completion.ibcm_cookie) != 8);
BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.completion.ibcm_status) != 56);
BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.completion.ibcm_status) != 4);
/* Sanity checks */
BUILD_BUG_ON(sizeof(struct kib_msg) > IBLND_MSG_SIZE);
BUILD_BUG_ON(offsetof(struct kib_msg,
ibm_u.get.ibgm_rd.rd_frags[IBLND_MAX_RDMA_FRAGS]) >
IBLND_MSG_SIZE);
BUILD_BUG_ON(offsetof(struct kib_msg,
ibm_u.putack.ibpam_rd.rd_frags[IBLND_MAX_RDMA_FRAGS]) >
IBLND_MSG_SIZE);
}
static void __exit ko2iblnd_exit(void)
{
lnet_unregister_lnd(&the_o2iblnd);
}
static int __init ko2iblnd_init(void)
{
int rc;
ko2inlnd_assert_wire_constants();
rc = kiblnd_tunables_init();
if (rc != 0)
return rc;
rc = libcfs_setup();
if (rc)
return rc;
lnet_register_lnd(&the_o2iblnd);
return 0;
}
#ifdef EXTERNAL_OFED_BUILD
#define OFED_VERSION " (ext ofed: " EXTERNAL_OFED_VERSION ")"
#else
#define OFED_VERSION " (in-kernel)"
#endif
MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
MODULE_DESCRIPTION("OpenIB gen2 LNet Network Driver");
MODULE_VERSION("2.8.0" OFED_VERSION);
MODULE_LICENSE("GPL");
late_initcall_sync(ko2iblnd_init);
module_exit(ko2iblnd_exit);
