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-rw-r--r--net/rds/ib.c241
1 files changed, 195 insertions, 46 deletions
diff --git a/net/rds/ib.c b/net/rds/ib.c
index a0954ace3774..9826fe7f9d00 100644
--- a/net/rds/ib.c
+++ b/net/rds/ib.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2006 Oracle. All rights reserved.
+ * Copyright (c) 2006, 2019 Oracle and/or its affiliates. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
@@ -39,6 +39,7 @@
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/module.h>
+#include <net/addrconf.h>
#include "rds_single_path.h"
#include "rds.h"
@@ -48,6 +49,7 @@
static unsigned int rds_ib_mr_1m_pool_size = RDS_MR_1M_POOL_SIZE;
static unsigned int rds_ib_mr_8k_pool_size = RDS_MR_8K_POOL_SIZE;
unsigned int rds_ib_retry_count = RDS_IB_DEFAULT_RETRY_COUNT;
+static atomic_t rds_ib_unloading;
module_param(rds_ib_mr_1m_pool_size, int, 0444);
MODULE_PARM_DESC(rds_ib_mr_1m_pool_size, " Max number of 1M mr per HCA");
@@ -85,7 +87,7 @@ static void rds_ib_dev_shutdown(struct rds_ib_device *rds_ibdev)
spin_lock_irqsave(&rds_ibdev->spinlock, flags);
list_for_each_entry(ic, &rds_ibdev->conn_list, ib_node)
- rds_conn_drop(ic->conn);
+ rds_conn_path_drop(&ic->conn->c_path[0], true);
spin_unlock_irqrestore(&rds_ibdev->spinlock, flags);
}
@@ -123,33 +125,42 @@ void rds_ib_dev_put(struct rds_ib_device *rds_ibdev)
queue_work(rds_wq, &rds_ibdev->free_work);
}
-static void rds_ib_add_one(struct ib_device *device)
+static int rds_ib_add_one(struct ib_device *device)
{
struct rds_ib_device *rds_ibdev;
+ int ret;
/* Only handle IB (no iWARP) devices */
if (device->node_type != RDMA_NODE_IB_CA)
- return;
+ return -EOPNOTSUPP;
+
+ /* Device must support FRWR */
+ if (!(device->attrs.device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS))
+ return -EOPNOTSUPP;
rds_ibdev = kzalloc_node(sizeof(struct rds_ib_device), GFP_KERNEL,
ibdev_to_node(device));
if (!rds_ibdev)
- return;
+ return -ENOMEM;
spin_lock_init(&rds_ibdev->spinlock);
refcount_set(&rds_ibdev->refcount, 1);
INIT_WORK(&rds_ibdev->free_work, rds_ib_dev_free);
+ INIT_LIST_HEAD(&rds_ibdev->ipaddr_list);
+ INIT_LIST_HEAD(&rds_ibdev->conn_list);
+
rds_ibdev->max_wrs = device->attrs.max_qp_wr;
- rds_ibdev->max_sge = min(device->attrs.max_sge, RDS_IB_MAX_SGE);
+ rds_ibdev->max_sge = min(device->attrs.max_send_sge, RDS_IB_MAX_SGE);
- rds_ibdev->has_fr = (device->attrs.device_cap_flags &
- IB_DEVICE_MEM_MGT_EXTENSIONS);
- rds_ibdev->has_fmr = (device->alloc_fmr && device->dealloc_fmr &&
- device->map_phys_fmr && device->unmap_fmr);
- rds_ibdev->use_fastreg = (rds_ibdev->has_fr && !rds_ibdev->has_fmr);
+ rds_ibdev->odp_capable =
+ !!(device->attrs.kernel_cap_flags &
+ IBK_ON_DEMAND_PAGING) &&
+ !!(device->attrs.odp_caps.per_transport_caps.rc_odp_caps &
+ IB_ODP_SUPPORT_WRITE) &&
+ !!(device->attrs.odp_caps.per_transport_caps.rc_odp_caps &
+ IB_ODP_SUPPORT_READ);
- rds_ibdev->fmr_max_remaps = device->attrs.max_map_per_fmr?: 32;
rds_ibdev->max_1m_mrs = device->attrs.max_mr ?
min_t(unsigned int, (device->attrs.max_mr / 2),
rds_ib_mr_1m_pool_size) : rds_ib_mr_1m_pool_size;
@@ -161,17 +172,20 @@ static void rds_ib_add_one(struct ib_device *device)
rds_ibdev->max_initiator_depth = device->attrs.max_qp_init_rd_atom;
rds_ibdev->max_responder_resources = device->attrs.max_qp_rd_atom;
- rds_ibdev->vector_load = kzalloc(sizeof(int) * device->num_comp_vectors,
+ rds_ibdev->vector_load = kcalloc(device->num_comp_vectors,
+ sizeof(int),
GFP_KERNEL);
if (!rds_ibdev->vector_load) {
pr_err("RDS/IB: %s failed to allocate vector memory\n",
__func__);
+ ret = -ENOMEM;
goto put_dev;
}
rds_ibdev->dev = device;
rds_ibdev->pd = ib_alloc_pd(device, 0);
if (IS_ERR(rds_ibdev->pd)) {
+ ret = PTR_ERR(rds_ibdev->pd);
rds_ibdev->pd = NULL;
goto put_dev;
}
@@ -179,6 +193,7 @@ static void rds_ib_add_one(struct ib_device *device)
rds_ibdev->mr_1m_pool =
rds_ib_create_mr_pool(rds_ibdev, RDS_IB_MR_1M_POOL);
if (IS_ERR(rds_ibdev->mr_1m_pool)) {
+ ret = PTR_ERR(rds_ibdev->mr_1m_pool);
rds_ibdev->mr_1m_pool = NULL;
goto put_dev;
}
@@ -186,21 +201,16 @@ static void rds_ib_add_one(struct ib_device *device)
rds_ibdev->mr_8k_pool =
rds_ib_create_mr_pool(rds_ibdev, RDS_IB_MR_8K_POOL);
if (IS_ERR(rds_ibdev->mr_8k_pool)) {
+ ret = PTR_ERR(rds_ibdev->mr_8k_pool);
rds_ibdev->mr_8k_pool = NULL;
goto put_dev;
}
- rdsdebug("RDS/IB: max_mr = %d, max_wrs = %d, max_sge = %d, fmr_max_remaps = %d, max_1m_mrs = %d, max_8k_mrs = %d\n",
- device->attrs.max_fmr, rds_ibdev->max_wrs, rds_ibdev->max_sge,
- rds_ibdev->fmr_max_remaps, rds_ibdev->max_1m_mrs,
- rds_ibdev->max_8k_mrs);
-
- pr_info("RDS/IB: %s: %s supported and preferred\n",
- device->name,
- rds_ibdev->use_fastreg ? "FRMR" : "FMR");
+ rdsdebug("RDS/IB: max_mr = %d, max_wrs = %d, max_sge = %d, max_1m_mrs = %d, max_8k_mrs = %d\n",
+ device->attrs.max_mr, rds_ibdev->max_wrs, rds_ibdev->max_sge,
+ rds_ibdev->max_1m_mrs, rds_ibdev->max_8k_mrs);
- INIT_LIST_HEAD(&rds_ibdev->ipaddr_list);
- INIT_LIST_HEAD(&rds_ibdev->conn_list);
+ pr_info("RDS/IB: %s: added\n", device->name);
down_write(&rds_ib_devices_lock);
list_add_tail_rcu(&rds_ibdev->list, &rds_ib_devices);
@@ -208,12 +218,13 @@ static void rds_ib_add_one(struct ib_device *device)
refcount_inc(&rds_ibdev->refcount);
ib_set_client_data(device, &rds_ib_client, rds_ibdev);
- refcount_inc(&rds_ibdev->refcount);
rds_ib_nodev_connect();
+ return 0;
put_dev:
rds_ib_dev_put(rds_ibdev);
+ return ret;
}
/*
@@ -255,9 +266,6 @@ static void rds_ib_remove_one(struct ib_device *device, void *client_data)
{
struct rds_ib_device *rds_ibdev = client_data;
- if (!rds_ibdev)
- return;
-
rds_ib_dev_shutdown(rds_ibdev);
/* stop connection attempts from getting a reference to this device. */
@@ -287,45 +295,103 @@ static int rds_ib_conn_info_visitor(struct rds_connection *conn,
void *buffer)
{
struct rds_info_rdma_connection *iinfo = buffer;
- struct rds_ib_connection *ic;
+ struct rds_ib_connection *ic = conn->c_transport_data;
/* We will only ever look at IB transports */
if (conn->c_trans != &rds_ib_transport)
return 0;
+ if (conn->c_isv6)
+ return 0;
- iinfo->src_addr = conn->c_laddr;
- iinfo->dst_addr = conn->c_faddr;
+ iinfo->src_addr = conn->c_laddr.s6_addr32[3];
+ iinfo->dst_addr = conn->c_faddr.s6_addr32[3];
+ if (ic) {
+ iinfo->tos = conn->c_tos;
+ iinfo->sl = ic->i_sl;
+ }
memset(&iinfo->src_gid, 0, sizeof(iinfo->src_gid));
memset(&iinfo->dst_gid, 0, sizeof(iinfo->dst_gid));
if (rds_conn_state(conn) == RDS_CONN_UP) {
struct rds_ib_device *rds_ibdev;
- struct rdma_dev_addr *dev_addr;
-
- ic = conn->c_transport_data;
- dev_addr = &ic->i_cm_id->route.addr.dev_addr;
- rdma_addr_get_sgid(dev_addr, (union ib_gid *) &iinfo->src_gid);
- rdma_addr_get_dgid(dev_addr, (union ib_gid *) &iinfo->dst_gid);
+ rdma_read_gids(ic->i_cm_id, (union ib_gid *)&iinfo->src_gid,
+ (union ib_gid *)&iinfo->dst_gid);
rds_ibdev = ic->rds_ibdev;
iinfo->max_send_wr = ic->i_send_ring.w_nr;
iinfo->max_recv_wr = ic->i_recv_ring.w_nr;
iinfo->max_send_sge = rds_ibdev->max_sge;
rds_ib_get_mr_info(rds_ibdev, iinfo);
+ iinfo->cache_allocs = atomic_read(&ic->i_cache_allocs);
}
return 1;
}
+#if IS_ENABLED(CONFIG_IPV6)
+/* IPv6 version of rds_ib_conn_info_visitor(). */
+static int rds6_ib_conn_info_visitor(struct rds_connection *conn,
+ void *buffer)
+{
+ struct rds6_info_rdma_connection *iinfo6 = buffer;
+ struct rds_ib_connection *ic = conn->c_transport_data;
+
+ /* We will only ever look at IB transports */
+ if (conn->c_trans != &rds_ib_transport)
+ return 0;
+
+ iinfo6->src_addr = conn->c_laddr;
+ iinfo6->dst_addr = conn->c_faddr;
+ if (ic) {
+ iinfo6->tos = conn->c_tos;
+ iinfo6->sl = ic->i_sl;
+ }
+
+ memset(&iinfo6->src_gid, 0, sizeof(iinfo6->src_gid));
+ memset(&iinfo6->dst_gid, 0, sizeof(iinfo6->dst_gid));
+
+ if (rds_conn_state(conn) == RDS_CONN_UP) {
+ struct rds_ib_device *rds_ibdev;
+
+ rdma_read_gids(ic->i_cm_id, (union ib_gid *)&iinfo6->src_gid,
+ (union ib_gid *)&iinfo6->dst_gid);
+ rds_ibdev = ic->rds_ibdev;
+ iinfo6->max_send_wr = ic->i_send_ring.w_nr;
+ iinfo6->max_recv_wr = ic->i_recv_ring.w_nr;
+ iinfo6->max_send_sge = rds_ibdev->max_sge;
+ rds6_ib_get_mr_info(rds_ibdev, iinfo6);
+ iinfo6->cache_allocs = atomic_read(&ic->i_cache_allocs);
+ }
+ return 1;
+}
+#endif
+
static void rds_ib_ic_info(struct socket *sock, unsigned int len,
struct rds_info_iterator *iter,
struct rds_info_lengths *lens)
{
+ u64 buffer[(sizeof(struct rds_info_rdma_connection) + 7) / 8];
+
rds_for_each_conn_info(sock, len, iter, lens,
rds_ib_conn_info_visitor,
+ buffer,
sizeof(struct rds_info_rdma_connection));
}
+#if IS_ENABLED(CONFIG_IPV6)
+/* IPv6 version of rds_ib_ic_info(). */
+static void rds6_ib_ic_info(struct socket *sock, unsigned int len,
+ struct rds_info_iterator *iter,
+ struct rds_info_lengths *lens)
+{
+ u64 buffer[(sizeof(struct rds6_info_rdma_connection) + 7) / 8];
+
+ rds_for_each_conn_info(sock, len, iter, lens,
+ rds6_ib_conn_info_visitor,
+ buffer,
+ sizeof(struct rds6_info_rdma_connection));
+}
+#endif
/*
* Early RDS/IB was built to only bind to an address if there is an IPoIB
@@ -337,35 +403,87 @@ static void rds_ib_ic_info(struct socket *sock, unsigned int len,
* allowed to influence which paths have priority. We could call userspace
* asserting this policy "routing".
*/
-static int rds_ib_laddr_check(struct net *net, __be32 addr)
+static int rds_ib_laddr_check(struct net *net, const struct in6_addr *addr,
+ __u32 scope_id)
{
int ret;
struct rdma_cm_id *cm_id;
+#if IS_ENABLED(CONFIG_IPV6)
+ struct sockaddr_in6 sin6;
+#endif
struct sockaddr_in sin;
+ struct sockaddr *sa;
+ bool isv4;
+ isv4 = ipv6_addr_v4mapped(addr);
/* Create a CMA ID and try to bind it. This catches both
* IB and iWARP capable NICs.
*/
- cm_id = rdma_create_id(&init_net, NULL, NULL, RDMA_PS_TCP, IB_QPT_RC);
+ cm_id = rdma_create_id(&init_net, rds_rdma_cm_event_handler,
+ NULL, RDMA_PS_TCP, IB_QPT_RC);
if (IS_ERR(cm_id))
return PTR_ERR(cm_id);
- memset(&sin, 0, sizeof(sin));
- sin.sin_family = AF_INET;
- sin.sin_addr.s_addr = addr;
+ if (isv4) {
+ memset(&sin, 0, sizeof(sin));
+ sin.sin_family = AF_INET;
+ sin.sin_addr.s_addr = addr->s6_addr32[3];
+ sa = (struct sockaddr *)&sin;
+ } else {
+#if IS_ENABLED(CONFIG_IPV6)
+ memset(&sin6, 0, sizeof(sin6));
+ sin6.sin6_family = AF_INET6;
+ sin6.sin6_addr = *addr;
+ sin6.sin6_scope_id = scope_id;
+ sa = (struct sockaddr *)&sin6;
+
+ /* XXX Do a special IPv6 link local address check here. The
+ * reason is that rdma_bind_addr() always succeeds with IPv6
+ * link local address regardless it is indeed configured in a
+ * system.
+ */
+ if (ipv6_addr_type(addr) & IPV6_ADDR_LINKLOCAL) {
+ struct net_device *dev;
+
+ if (scope_id == 0) {
+ ret = -EADDRNOTAVAIL;
+ goto out;
+ }
+
+ /* Use init_net for now as RDS is not network
+ * name space aware.
+ */
+ dev = dev_get_by_index(&init_net, scope_id);
+ if (!dev) {
+ ret = -EADDRNOTAVAIL;
+ goto out;
+ }
+ if (!ipv6_chk_addr(&init_net, addr, dev, 1)) {
+ dev_put(dev);
+ ret = -EADDRNOTAVAIL;
+ goto out;
+ }
+ dev_put(dev);
+ }
+#else
+ ret = -EADDRNOTAVAIL;
+ goto out;
+#endif
+ }
/* rdma_bind_addr will only succeed for IB & iWARP devices */
- ret = rdma_bind_addr(cm_id, (struct sockaddr *)&sin);
+ ret = rdma_bind_addr(cm_id, sa);
/* due to this, we will claim to support iWARP devices unless we
check node_type. */
if (ret || !cm_id->device ||
cm_id->device->node_type != RDMA_NODE_IB_CA)
ret = -EADDRNOTAVAIL;
- rdsdebug("addr %pI4 ret %d node type %d\n",
- &addr, ret,
- cm_id->device ? cm_id->device->node_type : -1);
+ rdsdebug("addr %pI6c%%%u ret %d node type %d\n",
+ addr, scope_id, ret,
+ cm_id->device ? cm_id->device->node_type : -1);
+out:
rdma_destroy_id(cm_id);
return ret;
@@ -378,9 +496,27 @@ static void rds_ib_unregister_client(void)
flush_workqueue(rds_wq);
}
+static void rds_ib_set_unloading(void)
+{
+ atomic_set(&rds_ib_unloading, 1);
+}
+
+static bool rds_ib_is_unloading(struct rds_connection *conn)
+{
+ struct rds_conn_path *cp = &conn->c_path[0];
+
+ return (test_bit(RDS_DESTROY_PENDING, &cp->cp_flags) ||
+ atomic_read(&rds_ib_unloading) != 0);
+}
+
void rds_ib_exit(void)
{
+ rds_ib_set_unloading();
+ synchronize_rcu();
rds_info_deregister_func(RDS_INFO_IB_CONNECTIONS, rds_ib_ic_info);
+#if IS_ENABLED(CONFIG_IPV6)
+ rds_info_deregister_func(RDS6_INFO_IB_CONNECTIONS, rds6_ib_ic_info);
+#endif
rds_ib_unregister_client();
rds_ib_destroy_nodev_conns();
rds_ib_sysctl_exit();
@@ -389,6 +525,15 @@ void rds_ib_exit(void)
rds_ib_mr_exit();
}
+static u8 rds_ib_get_tos_map(u8 tos)
+{
+ /* 1:1 user to transport map for RDMA transport.
+ * In future, if custom map is desired, hook can export
+ * user configurable map.
+ */
+ return tos;
+}
+
struct rds_transport rds_ib_transport = {
.laddr_check = rds_ib_laddr_check,
.xmit_path_complete = rds_ib_xmit_path_complete,
@@ -411,8 +556,10 @@ struct rds_transport rds_ib_transport = {
.sync_mr = rds_ib_sync_mr,
.free_mr = rds_ib_free_mr,
.flush_mrs = rds_ib_flush_mrs,
+ .get_tos_map = rds_ib_get_tos_map,
.t_owner = THIS_MODULE,
.t_name = "infiniband",
+ .t_unloading = rds_ib_is_unloading,
.t_type = RDS_TRANS_IB
};
@@ -441,6 +588,9 @@ int rds_ib_init(void)
rds_trans_register(&rds_ib_transport);
rds_info_register_func(RDS_INFO_IB_CONNECTIONS, rds_ib_ic_info);
+#if IS_ENABLED(CONFIG_IPV6)
+ rds_info_register_func(RDS6_INFO_IB_CONNECTIONS, rds6_ib_ic_info);
+#endif
goto out;
@@ -455,4 +605,3 @@ out:
}
MODULE_LICENSE("GPL");
-
generated by cgit (git 2.34.1) at 2025-12-24 22:22:22 +0000