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Final RDMA changes for the 3.6 merge window:

Browse Source 
- Fix IPoIB to stop using unsafe linkage between networking neighbour
    layer and private path database.
  - Small fixes for bugs found by Fengguang Wu's automated builds.
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Merge tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband

Pull final RDMA changes from Roland Dreier:
 - Fix IPoIB to stop using unsafe linkage between networking neighbour
   layer and private path database.
 - Small fixes for bugs found by Fengguang Wu's automated builds.

* tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
  IPoIB: Use a private hash table for path lookup in xmit path
  IB/qib: Fix size of cc_supported_table_entries
  RDMA/ucma: Convert open-coded equivalent to memdup_user()
  RDMA/ocrdma: Fix check of GSI CQs
  RDMA/cma: Use PTR_RET rather than if (IS_ERR(...)) + PTR_ERR
This commit is contained in:
Linus Torvalds 2012-07-31 18:59:55 -07:00
commit 941c8726e4
8 changed files with 561 additions and 264 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/infiniband/core/cma.c
View File

@ -3064,10 +3064,7 @@ static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
id_priv->id.port_num, &rec,
comp_mask, GFP_KERNEL,
cma_ib_mc_handler, mc);
if (IS_ERR(mc->multicast.ib))
return PTR_ERR(mc->multicast.ib);
return 0;
return PTR_RET(mc->multicast.ib);
}
static void iboe_mcast_work_handler(struct work_struct *work)

19
drivers/infiniband/core/ucma.c
View File

@ -1002,23 +1002,18 @@ static ssize_t ucma_set_option(struct ucma_file *file, const char __user *inbuf,
if (IS_ERR(ctx))
return PTR_ERR(ctx);
optval = kmalloc(cmd.optlen, GFP_KERNEL);
if (!optval) {
ret = -ENOMEM;
goto out1;
}
if (copy_from_user(optval, (void __user *) (unsigned long) cmd.optval,
cmd.optlen)) {
ret = -EFAULT;
goto out2;
optval = memdup_user((void __user *) (unsigned long) cmd.optval,
cmd.optlen);
if (IS_ERR(optval)) {
ret = PTR_ERR(optval);
goto out;
}
ret = ucma_set_option_level(ctx, cmd.level, cmd.optname, optval,
cmd.optlen);
out2:
kfree(optval);
out1:
out:
ucma_put_ctx(ctx);
return ret;
}

4
drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
View File

@ -893,7 +893,9 @@ static int ocrdma_check_qp_params(struct ib_pd *ibpd, struct ocrdma_dev *dev,
/* verify consumer QPs are not trying to use GSI QP's CQ */
if ((attrs->qp_type != IB_QPT_GSI) && (dev->gsi_qp_created)) {
if ((dev->gsi_sqcq == get_ocrdma_cq(attrs->send_cq)) ||
(dev->gsi_sqcq == get_ocrdma_cq(attrs->send_cq))) {
(dev->gsi_sqcq == get_ocrdma_cq(attrs->recv_cq)) ||
(dev->gsi_rqcq == get_ocrdma_cq(attrs->send_cq)) ||
(dev->gsi_rqcq == get_ocrdma_cq(attrs->recv_cq))) {
ocrdma_err("%s(%d) Consumer QP cannot use GSI CQs.\n",
__func__, dev->id);
return -EINVAL;

10
drivers/infiniband/hw/qib/qib.h
View File

@ -656,6 +656,11 @@ struct qib_pportdata {
/* 16 congestion entries with each entry corresponding to a SL */
struct ib_cc_congestion_entry_shadow *congestion_entries;
/* Maximum number of congestion control entries that the agent expects
* the manager to send.
*/
u16 cc_supported_table_entries;
/* Total number of congestion control table entries */
u16 total_cct_entry;
@ -667,11 +672,6 @@ struct qib_pportdata {
/* CA's max number of 64 entry units in the congestion control table */
u8 cc_max_table_entries;
/* Maximum number of congestion control entries that the agent expects
* the manager to send.
*/
u8 cc_supported_table_entries;
};
/* Observers. Not to be taken lightly, possibly not to ship. */

56
drivers/infiniband/ulp/ipoib/ipoib.h
View File

@ -92,6 +92,8 @@ enum {
IPOIB_STOP_REAPER = 7,
IPOIB_FLAG_ADMIN_CM = 9,
IPOIB_FLAG_UMCAST = 10,
IPOIB_STOP_NEIGH_GC = 11,
IPOIB_NEIGH_TBL_FLUSH = 12,
IPOIB_MAX_BACKOFF_SECONDS = 16,
@ -260,6 +262,20 @@ struct ipoib_ethtool_st {
u16 max_coalesced_frames;
};
struct ipoib_neigh_hash {
struct ipoib_neigh __rcu **buckets;
struct rcu_head rcu;
u32 mask;
u32 size;
};
struct ipoib_neigh_table {
struct ipoib_neigh_hash __rcu *htbl;
rwlock_t rwlock;
atomic_t entries;
struct completion flushed;
};
/*
* Device private locking: network stack tx_lock protects members used
* in TX fast path, lock protects everything else. lock nests inside
@ -279,6 +295,8 @@ struct ipoib_dev_priv {
struct rb_root path_tree;
struct list_head path_list;
struct ipoib_neigh_table ntbl;
struct ipoib_mcast *broadcast;
struct list_head multicast_list;
struct rb_root multicast_tree;
@ -291,7 +309,7 @@ struct ipoib_dev_priv {
struct work_struct flush_heavy;
struct work_struct restart_task;
struct delayed_work ah_reap_task;
struct delayed_work neigh_reap_task;
struct ib_device *ca;
u8 port;
u16 pkey;
@ -377,13 +395,16 @@ struct ipoib_neigh {
#ifdef CONFIG_INFINIBAND_IPOIB_CM
struct ipoib_cm_tx *cm;
#endif
union ib_gid dgid;
u8 daddr[INFINIBAND_ALEN];
struct sk_buff_head queue;
struct neighbour *neighbour;
struct net_device *dev;
struct list_head list;
struct ipoib_neigh __rcu *hnext;
struct rcu_head rcu;
atomic_t refcnt;
unsigned long alive;
};
#define IPOIB_UD_MTU(ib_mtu) (ib_mtu - IPOIB_ENCAP_LEN)
@ -394,21 +415,17 @@ static inline int ipoib_ud_need_sg(unsigned int ib_mtu)
return IPOIB_UD_BUF_SIZE(ib_mtu) > PAGE_SIZE;
}
/*
* We stash a pointer to our private neighbour information after our
* hardware address in neigh->ha. The ALIGN() expression here makes
* sure that this pointer is stored aligned so that an unaligned
* load is not needed to dereference it.
*/
static inline struct ipoib_neigh **to_ipoib_neigh(struct neighbour *neigh)
void ipoib_neigh_dtor(struct ipoib_neigh *neigh);
static inline void ipoib_neigh_put(struct ipoib_neigh *neigh)
{
return (void*) neigh + ALIGN(offsetof(struct neighbour, ha) +
INFINIBAND_ALEN, sizeof(void *));
if (atomic_dec_and_test(&neigh->refcnt))
ipoib_neigh_dtor(neigh);
}
struct ipoib_neigh *ipoib_neigh_alloc(struct neighbour *neigh,
struct ipoib_neigh *ipoib_neigh_get(struct net_device *dev, u8 *daddr);
struct ipoib_neigh *ipoib_neigh_alloc(u8 *daddr,
struct net_device *dev);
void ipoib_neigh_free(struct net_device *dev, struct ipoib_neigh *neigh);
void ipoib_neigh_free(struct ipoib_neigh *neigh);
void ipoib_del_neighs_by_gid(struct net_device *dev, u8 *gid);
extern struct workqueue_struct *ipoib_workqueue;
@ -425,7 +442,6 @@ static inline void ipoib_put_ah(struct ipoib_ah *ah)
{
kref_put(&ah->ref, ipoib_free_ah);
}
int ipoib_open(struct net_device *dev);
int ipoib_add_pkey_attr(struct net_device *dev);
int ipoib_add_umcast_attr(struct net_device *dev);
@ -455,7 +471,7 @@ void ipoib_dev_cleanup(struct net_device *dev);
void ipoib_mcast_join_task(struct work_struct *work);
void ipoib_mcast_carrier_on_task(struct work_struct *work);
void ipoib_mcast_send(struct net_device *dev, void *mgid, struct sk_buff *skb);
void ipoib_mcast_send(struct net_device *dev, u8 *daddr, struct sk_buff *skb);
void ipoib_mcast_restart_task(struct work_struct *work);
int ipoib_mcast_start_thread(struct net_device *dev);
@ -517,10 +533,10 @@ static inline int ipoib_cm_admin_enabled(struct net_device *dev)
test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
}
static inline int ipoib_cm_enabled(struct net_device *dev, struct neighbour *n)
static inline int ipoib_cm_enabled(struct net_device *dev, u8 *hwaddr)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
return IPOIB_CM_SUPPORTED(n->ha) &&
return IPOIB_CM_SUPPORTED(hwaddr) &&
test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
}
@ -575,7 +591,7 @@ static inline int ipoib_cm_admin_enabled(struct net_device *dev)
{
return 0;
}
static inline int ipoib_cm_enabled(struct net_device *dev, struct neighbour *n)
static inline int ipoib_cm_enabled(struct net_device *dev, u8 *hwaddr)
{
return 0;

16
drivers/infiniband/ulp/ipoib/ipoib_cm.c
View File

@ -811,9 +811,7 @@ void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ib_wc *wc)
if (neigh) {
neigh->cm = NULL;
list_del(&neigh->list);
if (neigh->ah)
ipoib_put_ah(neigh->ah);
ipoib_neigh_free(dev, neigh);
ipoib_neigh_free(neigh);
tx->neigh = NULL;
}
@ -1230,9 +1228,7 @@ static int ipoib_cm_tx_handler(struct ib_cm_id *cm_id,
if (neigh) {
neigh->cm = NULL;
list_del(&neigh->list);
if (neigh->ah)
ipoib_put_ah(neigh->ah);
ipoib_neigh_free(dev, neigh);
ipoib_neigh_free(neigh);
tx->neigh = NULL;
}
@ -1279,7 +1275,7 @@ void ipoib_cm_destroy_tx(struct ipoib_cm_tx *tx)
list_move(&tx->list, &priv->cm.reap_list);
queue_work(ipoib_workqueue, &priv->cm.reap_task);
ipoib_dbg(priv, "Reap connection for gid %pI6\n",
tx->neigh->dgid.raw);
tx->neigh->daddr + 4);
tx->neigh = NULL;
}
}
@ -1304,7 +1300,7 @@ static void ipoib_cm_tx_start(struct work_struct *work)
p = list_entry(priv->cm.start_list.next, typeof(*p), list);
list_del_init(&p->list);
neigh = p->neigh;
qpn = IPOIB_QPN(neigh->neighbour->ha);
qpn = IPOIB_QPN(neigh->daddr);
memcpy(&pathrec, &p->path->pathrec, sizeof pathrec);
spin_unlock_irqrestore(&priv->lock, flags);
@ -1320,9 +1316,7 @@ static void ipoib_cm_tx_start(struct work_struct *work)
if (neigh) {
neigh->cm = NULL;
list_del(&neigh->list);
if (neigh->ah)
ipoib_put_ah(neigh->ah);
ipoib_neigh_free(dev, neigh);
ipoib_neigh_free(neigh);
}
list_del(&p->list);
kfree(p);

632
drivers/infiniband/ulp/ipoib/ipoib_main.c
View File

@ -46,7 +46,8 @@
#include <linux/ip.h>
#include <linux/in.h>
#include <net/dst.h>
#include <linux/jhash.h>
#include <net/arp.h>
MODULE_AUTHOR("Roland Dreier");
MODULE_DESCRIPTION("IP-over-InfiniBand net driver");
@ -84,6 +85,7 @@ struct ib_sa_client ipoib_sa_client;
static void ipoib_add_one(struct ib_device *device);
static void ipoib_remove_one(struct ib_device *device);
static void ipoib_neigh_reclaim(struct rcu_head *rp);
static struct ib_client ipoib_client = {
.name = "ipoib",
@ -264,30 +266,15 @@ static int __path_add(struct net_device *dev, struct ipoib_path *path)
static void path_free(struct net_device *dev, struct ipoib_path *path)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
struct ipoib_neigh *neigh, *tn;
struct sk_buff *skb;
unsigned long flags;
while ((skb = __skb_dequeue(&path->queue)))
dev_kfree_skb_irq(skb);
spin_lock_irqsave(&priv->lock, flags);
ipoib_dbg(netdev_priv(dev), "path_free\n");
list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) {
/*
* It's safe to call ipoib_put_ah() inside priv->lock
* here, because we know that path->ah will always
* hold one more reference, so ipoib_put_ah() will
* never do more than decrement the ref count.
*/
if (neigh->ah)
ipoib_put_ah(neigh->ah);
ipoib_neigh_free(dev, neigh);
}
spin_unlock_irqrestore(&priv->lock, flags);
/* remove all neigh connected to this path */
ipoib_del_neighs_by_gid(dev, path->pathrec.dgid.raw);
if (path->ah)
ipoib_put_ah(path->ah);
@ -458,19 +445,15 @@ static void path_rec_completion(int status,
}
kref_get(&path->ah->ref);
neigh->ah = path->ah;
memcpy(&neigh->dgid.raw, &path->pathrec.dgid.raw,
sizeof(union ib_gid));
if (ipoib_cm_enabled(dev, neigh->neighbour)) {
if (ipoib_cm_enabled(dev, neigh->daddr)) {
if (!ipoib_cm_get(neigh))
ipoib_cm_set(neigh, ipoib_cm_create_tx(dev,
path,
neigh));
if (!ipoib_cm_get(neigh)) {
list_del(&neigh->list);
if (neigh->ah)
ipoib_put_ah(neigh->ah);
ipoib_neigh_free(dev, neigh);
ipoib_neigh_free(neigh);
continue;
}
}
@ -555,15 +538,15 @@ static int path_rec_start(struct net_device *dev,
return 0;
}
/* called with rcu_read_lock */
static void neigh_add_path(struct sk_buff *skb, struct neighbour *n, struct net_device *dev)
static void neigh_add_path(struct sk_buff *skb, u8 *daddr,
struct net_device *dev)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
struct ipoib_path *path;
struct ipoib_neigh *neigh;
unsigned long flags;
neigh = ipoib_neigh_alloc(n, skb->dev);
neigh = ipoib_neigh_alloc(daddr, dev);
if (!neigh) {
++dev->stats.tx_dropped;
dev_kfree_skb_any(skb);
@ -572,9 +555,9 @@ static void neigh_add_path(struct sk_buff *skb, struct neighbour *n, struct net_
spin_lock_irqsave(&priv->lock, flags);
path = __path_find(dev, n->ha + 4);
path = __path_find(dev, daddr + 4);
if (!path) {
path = path_rec_create(dev, n->ha + 4);
path = path_rec_create(dev, daddr + 4);
if (!path)
goto err_path;
@ -586,17 +569,13 @@ static void neigh_add_path(struct sk_buff *skb, struct neighbour *n, struct net_
if (path->ah) {
kref_get(&path->ah->ref);
neigh->ah = path->ah;
memcpy(&neigh->dgid.raw, &path->pathrec.dgid.raw,
sizeof(union ib_gid));
if (ipoib_cm_enabled(dev, neigh->neighbour)) {
if (ipoib_cm_enabled(dev, neigh->daddr)) {
if (!ipoib_cm_get(neigh))
ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, path, neigh));
if (!ipoib_cm_get(neigh)) {
list_del(&neigh->list);
if (neigh->ah)
ipoib_put_ah(neigh->ah);
ipoib_neigh_free(dev, neigh);
ipoib_neigh_free(neigh);
goto err_drop;
}
if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE)
@ -608,7 +587,8 @@ static void neigh_add_path(struct sk_buff *skb, struct neighbour *n, struct net_
}
} else {
spin_unlock_irqrestore(&priv->lock, flags);
ipoib_send(dev, skb, path->ah, IPOIB_QPN(n->ha));
ipoib_send(dev, skb, path->ah, IPOIB_QPN(daddr));
ipoib_neigh_put(neigh);
return;
}
} else {
@ -621,35 +601,20 @@ static void neigh_add_path(struct sk_buff *skb, struct neighbour *n, struct net_
}
spin_unlock_irqrestore(&priv->lock, flags);
ipoib_neigh_put(neigh);
return;
err_list:
list_del(&neigh->list);
err_path:
ipoib_neigh_free(dev, neigh);
ipoib_neigh_free(neigh);
err_drop:
++dev->stats.tx_dropped;
dev_kfree_skb_any(skb);
spin_unlock_irqrestore(&priv->lock, flags);
}
/* called with rcu_read_lock */
static void ipoib_path_lookup(struct sk_buff *skb, struct neighbour *n, struct net_device *dev)
{
struct ipoib_dev_priv *priv = netdev_priv(skb->dev);
/* Look up path record for unicasts */
if (n->ha[4] != 0xff) {
neigh_add_path(skb, n, dev);
return;
}
/* Add in the P_Key for multicasts */
n->ha[8] = (priv->pkey >> 8) & 0xff;
n->ha[9] = priv->pkey & 0xff;
ipoib_mcast_send(dev, n->ha + 4, skb);
ipoib_neigh_put(neigh);
}
static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev,
@ -710,55 +675,66 @@ static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
struct ipoib_neigh *neigh;
struct neighbour *n = NULL;
struct ipoib_cb *cb = (struct ipoib_cb *) skb->cb;
struct ipoib_header *header;
unsigned long flags;
rcu_read_lock();
if (likely(skb_dst(skb))) {
n = dst_neigh_lookup_skb(skb_dst(skb), skb);
if (!n) {
header = (struct ipoib_header *) skb->data;
if (unlikely(cb->hwaddr[4] == 0xff)) {
/* multicast, arrange "if" according to probability */
if ((header->proto != htons(ETH_P_IP)) &&
(header->proto != htons(ETH_P_IPV6)) &&
(header->proto != htons(ETH_P_ARP)) &&
(header->proto != htons(ETH_P_RARP))) {
/* ethertype not supported by IPoIB */
++dev->stats.tx_dropped;
dev_kfree_skb_any(skb);
goto unlock;
return NETDEV_TX_OK;
}
}
if (likely(n)) {
if (unlikely(!*to_ipoib_neigh(n))) {
ipoib_path_lookup(skb, n, dev);
goto unlock;
/* Add in the P_Key for multicast*/
cb->hwaddr[8] = (priv->pkey >> 8) & 0xff;
cb->hwaddr[9] = priv->pkey & 0xff;
neigh = ipoib_neigh_get(dev, cb->hwaddr);
if (likely(neigh))
goto send_using_neigh;
ipoib_mcast_send(dev, cb->hwaddr, skb);
return NETDEV_TX_OK;
}
neigh = *to_ipoib_neigh(n);
if (unlikely((memcmp(&neigh->dgid.raw,
n->ha + 4,
sizeof(union ib_gid))) ||
(neigh->dev != dev))) {
spin_lock_irqsave(&priv->lock, flags);
/*
* It's safe to call ipoib_put_ah() inside
* priv->lock here, because we know that
* path->ah will always hold one more reference,
* so ipoib_put_ah() will never do more than
* decrement the ref count.
*/
if (neigh->ah)
ipoib_put_ah(neigh->ah);
list_del(&neigh->list);
ipoib_neigh_free(dev, neigh);
spin_unlock_irqrestore(&priv->lock, flags);
ipoib_path_lookup(skb, n, dev);
goto unlock;
/* unicast, arrange "switch" according to probability */
switch (header->proto) {
case htons(ETH_P_IP):
case htons(ETH_P_IPV6):
neigh = ipoib_neigh_get(dev, cb->hwaddr);
if (unlikely(!neigh)) {
neigh_add_path(skb, cb->hwaddr, dev);
return NETDEV_TX_OK;
}
break;
case htons(ETH_P_ARP):
case htons(ETH_P_RARP):
/* for unicast ARP and RARP should always perform path find */
unicast_arp_send(skb, dev, cb);
return NETDEV_TX_OK;
default:
/* ethertype not supported by IPoIB */
++dev->stats.tx_dropped;
dev_kfree_skb_any(skb);
return NETDEV_TX_OK;
}
send_using_neigh:
/* note we now hold a ref to neigh */
if (ipoib_cm_get(neigh)) {
if (ipoib_cm_up(neigh)) {
ipoib_cm_send(dev, skb, ipoib_cm_get(neigh));
goto unlock;
goto unref;
}
} else if (neigh->ah) {
ipoib_send(dev, skb, neigh->ah, IPOIB_QPN(n->ha));
goto unlock;
ipoib_send(dev, skb, neigh->ah, IPOIB_QPN(cb->hwaddr));
goto unref;
}
if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
@ -769,37 +745,10 @@ static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev)
++dev->stats.tx_dropped;
dev_kfree_skb_any(skb);
}
} else {
struct ipoib_cb *cb = (struct ipoib_cb *) skb->cb;
if (cb->hwaddr[4] == 0xff) {
/* Add in the P_Key for multicast*/
cb->hwaddr[8] = (priv->pkey >> 8) & 0xff;
cb->hwaddr[9] = priv->pkey & 0xff;
unref:
ipoib_neigh_put(neigh);
ipoib_mcast_send(dev, cb->hwaddr + 4, skb);
} else {
/* unicast GID -- should be ARP or RARP reply */
if ((be16_to_cpup((__be16 *) skb->data) != ETH_P_ARP) &&
(be16_to_cpup((__be16 *) skb->data) != ETH_P_RARP)) {
ipoib_warn(priv, "Unicast, no %s: type %04x, QPN %06x %pI6\n",
skb_dst(skb) ? "neigh" : "dst",
be16_to_cpup((__be16 *) skb->data),
IPOIB_QPN(cb->hwaddr),
cb->hwaddr + 4);
dev_kfree_skb_any(skb);
++dev->stats.tx_dropped;
goto unlock;
}
unicast_arp_send(skb, dev, cb);
}
}
unlock:
if (n)
neigh_release(n);
rcu_read_unlock();
return NETDEV_TX_OK;
}
@ -821,6 +770,7 @@ static int ipoib_hard_header(struct sk_buff *skb,
const void *daddr, const void *saddr, unsigned len)
{
struct ipoib_header *header;
struct ipoib_cb *cb = (struct ipoib_cb *) skb->cb;
header = (struct ipoib_header *) skb_push(skb, sizeof *header);
@ -828,14 +778,11 @@ static int ipoib_hard_header(struct sk_buff *skb,
header->reserved = 0;
/*
* If we don't have a dst_entry structure, stuff the
* we don't rely on dst_entry structure, always stuff the
* destination address into skb->cb so we can figure out where
* to send the packet later.
*/
if (!skb_dst(skb)) {
struct ipoib_cb *cb = (struct ipoib_cb *) skb->cb;
memcpy(cb->hwaddr, daddr, INFINIBAND_ALEN);
}
return 0;
}
@ -852,86 +799,438 @@ static void ipoib_set_mcast_list(struct net_device *dev)
queue_work(ipoib_workqueue, &priv->restart_task);
}
static void ipoib_neigh_cleanup(struct neighbour *n)
static u32 ipoib_addr_hash(struct ipoib_neigh_hash *htbl, u8 *daddr)
{
struct ipoib_neigh *neigh;
struct ipoib_dev_priv *priv = netdev_priv(n->dev);
unsigned long flags;
struct ipoib_ah *ah = NULL;
/*
* Use only the address parts that contributes to spreading
* The subnet prefix is not used as one can not connect to
* same remote port (GUID) using the same remote QPN via two
* different subnets.
*/
/* qpn octets[1:4) & port GUID octets[12:20) */
u32 *daddr_32 = (u32 *) daddr;
u32 hv;
neigh = *to_ipoib_neigh(n);
if (neigh)
priv = netdev_priv(neigh->dev);
else
return;
ipoib_dbg(priv,
"neigh_cleanup for %06x %pI6\n",
IPOIB_QPN(n->ha),
n->ha + 4);
spin_lock_irqsave(&priv->lock, flags);
if (neigh->ah)
ah = neigh->ah;
list_del(&neigh->list);
ipoib_neigh_free(n->dev, neigh);
spin_unlock_irqrestore(&priv->lock, flags);
if (ah)
ipoib_put_ah(ah);
hv = jhash_3words(daddr_32[3], daddr_32[4], 0xFFFFFF & daddr_32[0], 0);
return hv & htbl->mask;
}
struct ipoib_neigh *ipoib_neigh_alloc(struct neighbour *neighbour,
struct ipoib_neigh *ipoib_neigh_get(struct net_device *dev, u8 *daddr)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
struct ipoib_neigh_table *ntbl = &priv->ntbl;
struct ipoib_neigh_hash *htbl;
struct ipoib_neigh *neigh = NULL;
u32 hash_val;
rcu_read_lock_bh();
htbl = rcu_dereference_bh(ntbl->htbl);
if (!htbl)
goto out_unlock;
hash_val = ipoib_addr_hash(htbl, daddr);
for (neigh = rcu_dereference_bh(htbl->buckets[hash_val]);
neigh != NULL;
neigh = rcu_dereference_bh(neigh->hnext)) {
if (memcmp(daddr, neigh->daddr, INFINIBAND_ALEN) == 0) {
/* found, take one ref on behalf of the caller */
if (!atomic_inc_not_zero(&neigh->refcnt)) {
/* deleted */
neigh = NULL;
goto out_unlock;
}
neigh->alive = jiffies;
goto out_unlock;
}
}
out_unlock:
rcu_read_unlock_bh();
return neigh;
}
static void __ipoib_reap_neigh(struct ipoib_dev_priv *priv)
{
struct ipoib_neigh_table *ntbl = &priv->ntbl;
struct ipoib_neigh_hash *htbl;
unsigned long neigh_obsolete;
unsigned long dt;
unsigned long flags;
int i;
if (test_bit(IPOIB_STOP_NEIGH_GC, &priv->flags))
return;
write_lock_bh(&ntbl->rwlock);
htbl = rcu_dereference_protected(ntbl->htbl,
lockdep_is_held(&ntbl->rwlock));
if (!htbl)
goto out_unlock;
/* neigh is obsolete if it was idle for two GC periods */
dt = 2 * arp_tbl.gc_interval;
neigh_obsolete = jiffies - dt;
/* handle possible race condition */
if (test_bit(IPOIB_STOP_NEIGH_GC, &priv->flags))
goto out_unlock;
for (i = 0; i < htbl->size; i++) {
struct ipoib_neigh *neigh;
struct ipoib_neigh __rcu **np = &htbl->buckets[i];
while ((neigh = rcu_dereference_protected(*np,
lockdep_is_held(&ntbl->rwlock))) != NULL) {
/* was the neigh idle for two GC periods */
if (time_after(neigh_obsolete, neigh->alive)) {
rcu_assign_pointer(*np,
rcu_dereference_protected(neigh->hnext,
lockdep_is_held(&ntbl->rwlock)));
/* remove from path/mc list */
spin_lock_irqsave(&priv->lock, flags);
list_del(&neigh->list);
spin_unlock_irqrestore(&priv->lock, flags);
call_rcu(&neigh->rcu, ipoib_neigh_reclaim);
} else {
np = &neigh->hnext;
}
}
}
out_unlock:
write_unlock_bh(&ntbl->rwlock);
}
static void ipoib_reap_neigh(struct work_struct *work)
{
struct ipoib_dev_priv *priv =
container_of(work, struct ipoib_dev_priv, neigh_reap_task.work);
__ipoib_reap_neigh(priv);
if (!test_bit(IPOIB_STOP_NEIGH_GC, &priv->flags))
queue_delayed_work(ipoib_workqueue, &priv->neigh_reap_task,
arp_tbl.gc_interval);
}
static struct ipoib_neigh *ipoib_neigh_ctor(u8 *daddr,
struct net_device *dev)
{
struct ipoib_neigh *neigh;
neigh = kmalloc(sizeof *neigh, GFP_ATOMIC);
neigh = kzalloc(sizeof *neigh, GFP_ATOMIC);
if (!neigh)
return NULL;
neigh->neighbour = neighbour;
neigh->dev = dev;
memset(&neigh->dgid.raw, 0, sizeof (union ib_gid));
*to_ipoib_neigh(neighbour) = neigh;
memcpy(&neigh->daddr, daddr, sizeof(neigh->daddr));
skb_queue_head_init(&neigh->queue);
INIT_LIST_HEAD(&neigh->list);
ipoib_cm_set(neigh, NULL);
/* one ref on behalf of the caller */
atomic_set(&neigh->refcnt, 1);
return neigh;
}
void ipoib_neigh_free(struct net_device *dev, struct ipoib_neigh *neigh)
struct ipoib_neigh *ipoib_neigh_alloc(u8 *daddr,
struct net_device *dev)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
struct ipoib_neigh_table *ntbl = &priv->ntbl;
struct ipoib_neigh_hash *htbl;
struct ipoib_neigh *neigh;
u32 hash_val;
write_lock_bh(&ntbl->rwlock);
htbl = rcu_dereference_protected(ntbl->htbl,
lockdep_is_held(&ntbl->rwlock));
if (!htbl) {
neigh = NULL;
goto out_unlock;
}
/* need to add a new neigh, but maybe some other thread succeeded?
* recalc hash, maybe hash resize took place so we do a search
*/
hash_val = ipoib_addr_hash(htbl, daddr);
for (neigh = rcu_dereference_protected(htbl->buckets[hash_val],
lockdep_is_held(&ntbl->rwlock));
neigh != NULL;
neigh = rcu_dereference_protected(neigh->hnext,
lockdep_is_held(&ntbl->rwlock))) {
if (memcmp(daddr, neigh->daddr, INFINIBAND_ALEN) == 0) {
/* found, take one ref on behalf of the caller */
if (!atomic_inc_not_zero(&neigh->refcnt)) {
/* deleted */
neigh = NULL;
break;
}
neigh->alive = jiffies;
goto out_unlock;
}
}
neigh = ipoib_neigh_ctor(daddr, dev);
if (!neigh)
goto out_unlock;
/* one ref on behalf of the hash table */
atomic_inc(&neigh->refcnt);
neigh->alive = jiffies;
/* put in hash */
rcu_assign_pointer(neigh->hnext,
rcu_dereference_protected(htbl->buckets[hash_val],
lockdep_is_held(&ntbl->rwlock)));
rcu_assign_pointer(htbl->buckets[hash_val], neigh);
atomic_inc(&ntbl->entries);
out_unlock:
write_unlock_bh(&ntbl->rwlock);
return neigh;
}
void ipoib_neigh_dtor(struct ipoib_neigh *neigh)
{
/* neigh reference count was dropprd to zero */
struct net_device *dev = neigh->dev;
struct ipoib_dev_priv *priv = netdev_priv(dev);
struct sk_buff *skb;
*to_ipoib_neigh(neigh->neighbour) = NULL;
if (neigh->ah)
ipoib_put_ah(neigh->ah);
while ((skb = __skb_dequeue(&neigh->queue))) {
++dev->stats.tx_dropped;
dev_kfree_skb_any(skb);
}
if (ipoib_cm_get(neigh))
ipoib_cm_destroy_tx(ipoib_cm_get(neigh));
ipoib_dbg(netdev_priv(dev),
"neigh free for %06x %pI6\n",
IPOIB_QPN(neigh->daddr),
neigh->daddr + 4);
kfree(neigh);
if (atomic_dec_and_test(&priv->ntbl.entries)) {
if (test_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags))
complete(&priv->ntbl.flushed);
}
}
static int ipoib_neigh_setup_dev(struct net_device *dev, struct neigh_parms *parms)
static void ipoib_neigh_reclaim(struct rcu_head *rp)
{
parms->neigh_cleanup = ipoib_neigh_cleanup;
/* Called as a result of removal from hash table */
struct ipoib_neigh *neigh = container_of(rp, struct ipoib_neigh, rcu);
/* note TX context may hold another ref */
ipoib_neigh_put(neigh);
}
void ipoib_neigh_free(struct ipoib_neigh *neigh)
{
struct net_device *dev = neigh->dev;
struct ipoib_dev_priv *priv = netdev_priv(dev);
struct ipoib_neigh_table *ntbl = &priv->ntbl;
struct ipoib_neigh_hash *htbl;
struct ipoib_neigh __rcu **np;
struct ipoib_neigh *n;
u32 hash_val;
write_lock_bh(&ntbl->rwlock);
htbl = rcu_dereference_protected(ntbl->htbl,
lockdep_is_held(&ntbl->rwlock));
if (!htbl)
goto out_unlock;
hash_val = ipoib_addr_hash(htbl, neigh->daddr);
np = &htbl->buckets[hash_val];
for (n = rcu_dereference_protected(*np,
lockdep_is_held(&ntbl->rwlock));
n != NULL;
n = rcu_dereference_protected(neigh->hnext,
lockdep_is_held(&ntbl->rwlock))) {
if (n == neigh) {
/* found */
rcu_assign_pointer(*np,
rcu_dereference_protected(neigh->hnext,
lockdep_is_held(&ntbl->rwlock)));
call_rcu(&neigh->rcu, ipoib_neigh_reclaim);
goto out_unlock;
} else {
np = &n->hnext;
}
}
out_unlock:
write_unlock_bh(&ntbl->rwlock);
}
static int ipoib_neigh_hash_init(struct ipoib_dev_priv *priv)
{
struct ipoib_neigh_table *ntbl = &priv->ntbl;
struct ipoib_neigh_hash *htbl;
struct ipoib_neigh **buckets;
u32 size;
clear_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags);
ntbl->htbl = NULL;
rwlock_init(&ntbl->rwlock);
htbl = kzalloc(sizeof(*htbl), GFP_KERNEL);
if (!htbl)
return -ENOMEM;
set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags);
size = roundup_pow_of_two(arp_tbl.gc_thresh3);
buckets = kzalloc(size * sizeof(*buckets), GFP_KERNEL);
if (!buckets) {
kfree(htbl);
return -ENOMEM;
}
htbl->size = size;
htbl->mask = (size - 1);
htbl->buckets = buckets;
ntbl->htbl = htbl;
atomic_set(&ntbl->entries, 0);
/* start garbage collection */
clear_bit(IPOIB_STOP_NEIGH_GC, &priv->flags);
queue_delayed_work(ipoib_workqueue, &priv->neigh_reap_task,
arp_tbl.gc_interval);
return 0;
}
static void neigh_hash_free_rcu(struct rcu_head *head)
{
struct ipoib_neigh_hash *htbl = container_of(head,
struct ipoib_neigh_hash,
rcu);
struct ipoib_neigh __rcu **buckets = htbl->buckets;
kfree(buckets);
kfree(htbl);
}
void ipoib_del_neighs_by_gid(struct net_device *dev, u8 *gid)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
struct ipoib_neigh_table *ntbl = &priv->ntbl;
struct ipoib_neigh_hash *htbl;
unsigned long flags;
int i;
/* remove all neigh connected to a given path or mcast */
write_lock_bh(&ntbl->rwlock);
htbl = rcu_dereference_protected(ntbl->htbl,
lockdep_is_held(&ntbl->rwlock));
if (!htbl)
goto out_unlock;
for (i = 0; i < htbl->size; i++) {
struct ipoib_neigh *neigh;
struct ipoib_neigh __rcu **np = &htbl->buckets[i];
while ((neigh = rcu_dereference_protected(*np,
lockdep_is_held(&ntbl->rwlock))) != NULL) {
/* delete neighs belong to this parent */
if (!memcmp(gid, neigh->daddr + 4, sizeof (union ib_gid))) {
rcu_assign_pointer(*np,
rcu_dereference_protected(neigh->hnext,
lockdep_is_held(&ntbl->rwlock)));
/* remove from parent list */
spin_lock_irqsave(&priv->lock, flags);
list_del(&neigh->list);
spin_unlock_irqrestore(&priv->lock, flags);
call_rcu(&neigh->rcu, ipoib_neigh_reclaim);
} else {
np = &neigh->hnext;
}
}
}
out_unlock:
write_unlock_bh(&ntbl->rwlock);
}
static void ipoib_flush_neighs(struct ipoib_dev_priv *priv)
{
struct ipoib_neigh_table *ntbl = &priv->ntbl;
struct ipoib_neigh_hash *htbl;
unsigned long flags;
int i;
write_lock_bh(&ntbl->rwlock);
htbl = rcu_dereference_protected(ntbl->htbl,
lockdep_is_held(&ntbl->rwlock));
if (!htbl)
goto out_unlock;
for (i = 0; i < htbl->size; i++) {
struct ipoib_neigh *neigh;
struct ipoib_neigh __rcu **np = &htbl->buckets[i];
while ((neigh = rcu_dereference_protected(*np,
lockdep_is_held(&ntbl->rwlock))) != NULL) {
rcu_assign_pointer(*np,
rcu_dereference_protected(neigh->hnext,
lockdep_is_held(&ntbl->rwlock)));
/* remove from path/mc list */
spin_lock_irqsave(&priv->lock, flags);
list_del(&neigh->list);
spin_unlock_irqrestore(&priv->lock, flags);
call_rcu(&neigh->rcu, ipoib_neigh_reclaim);
}
}
rcu_assign_pointer(ntbl->htbl, NULL);
call_rcu(&htbl->rcu, neigh_hash_free_rcu);
out_unlock:
write_unlock_bh(&ntbl->rwlock);
}
static void ipoib_neigh_hash_uninit(struct net_device *dev)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
int stopped;
ipoib_dbg(priv, "ipoib_neigh_hash_uninit\n");
init_completion(&priv->ntbl.flushed);
set_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags);
/* Stop GC if called at init fail need to cancel work */
stopped = test_and_set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags);
if (!stopped)
cancel_delayed_work(&priv->neigh_reap_task);
if (atomic_read(&priv->ntbl.entries)) {
ipoib_flush_neighs(priv);
wait_for_completion(&priv->ntbl.flushed);
}
}
int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
if (ipoib_neigh_hash_init(priv) < 0)
goto out;
/* Allocate RX/TX "rings" to hold queued skbs */
priv->rx_ring = kzalloc(ipoib_recvq_size * sizeof *priv->rx_ring,
GFP_KERNEL);
if (!priv->rx_ring) {
printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n",
ca->name, ipoib_recvq_size);
goto out;
goto out_neigh_hash_cleanup;
}
priv->tx_ring = vzalloc(ipoib_sendq_size * sizeof *priv->tx_ring);
@ -954,6 +1253,8 @@ int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port)
out_rx_ring_cleanup:
kfree(priv->rx_ring);
out_neigh_hash_cleanup:
ipoib_neigh_hash_uninit(dev);
out:
return -ENOMEM;
}
@ -966,6 +1267,9 @@ void ipoib_dev_cleanup(struct net_device *dev)
/* Delete any child interfaces first */
list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) {
/* Stop GC on child */
set_bit(IPOIB_STOP_NEIGH_GC, &cpriv->flags);
cancel_delayed_work(&cpriv->neigh_reap_task);
unregister_netdev(cpriv->dev);
ipoib_dev_cleanup(cpriv->dev);
free_netdev(cpriv->dev);
@ -978,6 +1282,8 @@ void ipoib_dev_cleanup(struct net_device *dev)
priv->rx_ring = NULL;
priv->tx_ring = NULL;
ipoib_neigh_hash_uninit(dev);
}
static const struct header_ops ipoib_header_ops = {
@ -992,7 +1298,6 @@ static const struct net_device_ops ipoib_netdev_ops = {
.ndo_start_xmit = ipoib_start_xmit,
.ndo_tx_timeout = ipoib_timeout,
.ndo_set_rx_mode = ipoib_set_mcast_list,
.ndo_neigh_setup = ipoib_neigh_setup_dev,
};
static void ipoib_setup(struct net_device *dev)
@ -1041,6 +1346,7 @@ static void ipoib_setup(struct net_device *dev)
INIT_WORK(&priv->flush_heavy, ipoib_ib_dev_flush_heavy);
INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task);
INIT_DELAYED_WORK(&priv->ah_reap_task, ipoib_reap_ah);
INIT_DELAYED_WORK(&priv->neigh_reap_task, ipoib_reap_neigh);
}
struct ipoib_dev_priv *ipoib_intf_alloc(const char *name)
@ -1281,6 +1587,9 @@ static struct net_device *ipoib_add_port(const char *format,
register_failed:
ib_unregister_event_handler(&priv->event_handler);
/* Stop GC if started before flush */
set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags);
cancel_delayed_work(&priv->neigh_reap_task);
flush_workqueue(ipoib_workqueue);
event_failed:
@ -1347,6 +1656,9 @@ static void ipoib_remove_one(struct ib_device *device)
dev_change_flags(priv->dev, priv->dev->flags & ~IFF_UP);
rtnl_unlock();
/* Stop GC */
set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags);
cancel_delayed_work(&priv->neigh_reap_task);
flush_workqueue(ipoib_workqueue);
unregister_netdev(priv->dev);

47
drivers/infiniband/ulp/ipoib/ipoib_multicast.c
View File

@ -69,28 +69,13 @@ struct ipoib_mcast_iter {
static void ipoib_mcast_free(struct ipoib_mcast *mcast)
{
struct net_device *dev = mcast->dev;
struct ipoib_dev_priv *priv = netdev_priv(dev);
struct ipoib_neigh *neigh, *tmp;
int tx_dropped = 0;
ipoib_dbg_mcast(netdev_priv(dev), "deleting multicast group %pI6\n",
mcast->mcmember.mgid.raw);
spin_lock_irq(&priv->lock);
list_for_each_entry_safe(neigh, tmp, &mcast->neigh_list, list) {
/*
* It's safe to call ipoib_put_ah() inside priv->lock
* here, because we know that mcast->ah will always
* hold one more reference, so ipoib_put_ah() will
* never do more than decrement the ref count.
*/
if (neigh->ah)
ipoib_put_ah(neigh->ah);
ipoib_neigh_free(dev, neigh);
}
spin_unlock_irq(&priv->lock);
/* remove all neigh connected to this mcast */
ipoib_del_neighs_by_gid(dev, mcast->mcmember.mgid.raw);
if (mcast->ah)
ipoib_put_ah(mcast->ah);
@ -655,17 +640,12 @@ static int ipoib_mcast_leave(struct net_device *dev, struct ipoib_mcast *mcast)
return 0;
}
void ipoib_mcast_send(struct net_device *dev, void *mgid, struct sk_buff *skb)
void ipoib_mcast_send(struct net_device *dev, u8 *daddr, struct sk_buff *skb)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
struct dst_entry *dst = skb_dst(skb);
struct ipoib_mcast *mcast;
struct neighbour *n;
unsigned long flags;
n = NULL;
if (dst)
n = dst_neigh_lookup_skb(dst, skb);
void *mgid = daddr + 4;
spin_lock_irqsave(&priv->lock, flags);
@ -721,28 +701,29 @@ void ipoib_mcast_send(struct net_device *dev, void *mgid, struct sk_buff *skb)
out:
if (mcast && mcast->ah) {
if (n) {
if (!*to_ipoib_neigh(n)) {
struct ipoib_neigh *neigh;
neigh = ipoib_neigh_alloc(n, skb->dev);
spin_unlock_irqrestore(&priv->lock, flags);
neigh = ipoib_neigh_get(dev, daddr);
spin_lock_irqsave(&priv->lock, flags);
if (!neigh) {
spin_unlock_irqrestore(&priv->lock, flags);
neigh = ipoib_neigh_alloc(daddr, dev);
spin_lock_irqsave(&priv->lock, flags);
if (neigh) {
kref_get(&mcast->ah->ref);
neigh->ah = mcast->ah;
list_add_tail(&neigh->list,
&mcast->neigh_list);
list_add_tail(&neigh->list, &mcast->neigh_list);
}
}
neigh_release(n);
}
spin_unlock_irqrestore(&priv->lock, flags);
ipoib_send(dev, skb, mcast->ah, IB_MULTICAST_QPN);
if (neigh)
ipoib_neigh_put(neigh);
return;
}
unlock:
if (n)
neigh_release(n);
spin_unlock_irqrestore(&priv->lock, flags);
}