Commit 4c21b5bc authored by Haggai Eran's avatar Haggai Eran Committed by Doug Ledford

IB/cma: Add net_dev and private data checks to RDMA CM

Instead of relying on a the ib_cm module to check an incoming CM request's
private data header, add these checks to the RDMA CM module. This allows a
following patch to to clean up the ib_cm interface and remove the code that
looks into the private headers. It will also allow supporting namespaces in
RDMA CM by making these checks namespace aware later on.
Signed-off-by: default avatarHaggai Eran <haggaie@mellanox.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent 24cad9a7
......@@ -263,6 +263,15 @@ struct cma_hdr {
#define CMA_VERSION 0x00
struct cma_req_info {
struct ib_device *device;
int port;
union ib_gid local_gid;
__be64 service_id;
u16 pkey;
bool has_gid:1;
};
static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
{
unsigned long flags;
......@@ -300,7 +309,7 @@ static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
return old;
}
static inline u8 cma_get_ip_ver(struct cma_hdr *hdr)
static inline u8 cma_get_ip_ver(const struct cma_hdr *hdr)
{
return hdr->ip_version >> 4;
}
......@@ -1016,7 +1025,7 @@ static int cma_save_ip_info(struct sockaddr *src_addr,
cma_save_ip6_info(src_addr, dst_addr, hdr, port);
break;
default:
return -EINVAL;
return -EAFNOSUPPORT;
}
return 0;
......@@ -1040,6 +1049,176 @@ static int cma_save_net_info(struct sockaddr *src_addr,
return cma_save_ip_info(src_addr, dst_addr, ib_event, service_id);
}
static int cma_save_req_info(const struct ib_cm_event *ib_event,
struct cma_req_info *req)
{
const struct ib_cm_req_event_param *req_param =
&ib_event->param.req_rcvd;
const struct ib_cm_sidr_req_event_param *sidr_param =
&ib_event->param.sidr_req_rcvd;
switch (ib_event->event) {
case IB_CM_REQ_RECEIVED:
req->device = req_param->listen_id->device;
req->port = req_param->port;
memcpy(&req->local_gid, &req_param->primary_path->sgid,
sizeof(req->local_gid));
req->has_gid = true;
req->service_id = req_param->primary_path->service_id;
req->pkey = req_param->bth_pkey;
break;
case IB_CM_SIDR_REQ_RECEIVED:
req->device = sidr_param->listen_id->device;
req->port = sidr_param->port;
req->has_gid = false;
req->service_id = sidr_param->service_id;
req->pkey = sidr_param->bth_pkey;
break;
default:
return -EINVAL;
}
return 0;
}
static struct net_device *cma_get_net_dev(struct ib_cm_event *ib_event,
const struct cma_req_info *req)
{
struct sockaddr_storage listen_addr_storage;
struct sockaddr *listen_addr = (struct sockaddr *)&listen_addr_storage;
struct net_device *net_dev;
const union ib_gid *gid = req->has_gid ? &req->local_gid : NULL;
int err;
err = cma_save_ip_info(listen_addr, NULL, ib_event, req->service_id);
if (err)
return ERR_PTR(err);
net_dev = ib_get_net_dev_by_params(req->device, req->port, req->pkey,
gid, listen_addr);
if (!net_dev)
return ERR_PTR(-ENODEV);
return net_dev;
}
static enum rdma_port_space rdma_ps_from_service_id(__be64 service_id)
{
return (be64_to_cpu(service_id) >> 16) & 0xffff;
}
static bool cma_match_private_data(struct rdma_id_private *id_priv,
const struct cma_hdr *hdr)
{
struct sockaddr *addr = cma_src_addr(id_priv);
__be32 ip4_addr;
struct in6_addr ip6_addr;
if (cma_any_addr(addr) && !id_priv->afonly)
return true;
switch (addr->sa_family) {
case AF_INET:
ip4_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
if (cma_get_ip_ver(hdr) != 4)
return false;
if (!cma_any_addr(addr) &&
hdr->dst_addr.ip4.addr != ip4_addr)
return false;
break;
case AF_INET6:
ip6_addr = ((struct sockaddr_in6 *)addr)->sin6_addr;
if (cma_get_ip_ver(hdr) != 6)
return false;
if (!cma_any_addr(addr) &&
memcmp(&hdr->dst_addr.ip6, &ip6_addr, sizeof(ip6_addr)))
return false;
break;
case AF_IB:
return true;
default:
return false;
}
return true;
}
static bool cma_match_net_dev(const struct rdma_id_private *id_priv,
const struct net_device *net_dev)
{
const struct rdma_addr *addr = &id_priv->id.route.addr;
if (!net_dev)
/* This request is an AF_IB request */
return addr->src_addr.ss_family == AF_IB;
return !addr->dev_addr.bound_dev_if ||
(net_eq(dev_net(net_dev), &init_net) &&
addr->dev_addr.bound_dev_if == net_dev->ifindex);
}
static struct rdma_id_private *cma_find_listener(
const struct rdma_bind_list *bind_list,
const struct ib_cm_id *cm_id,
const struct ib_cm_event *ib_event,
const struct cma_req_info *req,
const struct net_device *net_dev)
{
struct rdma_id_private *id_priv, *id_priv_dev;
if (!bind_list)
return ERR_PTR(-EINVAL);
hlist_for_each_entry(id_priv, &bind_list->owners, node) {
if (cma_match_private_data(id_priv, ib_event->private_data)) {
if (id_priv->id.device == cm_id->device &&
cma_match_net_dev(id_priv, net_dev))
return id_priv;
list_for_each_entry(id_priv_dev,
&id_priv->listen_list,
listen_list) {
if (id_priv_dev->id.device == cm_id->device &&
cma_match_net_dev(id_priv_dev, net_dev))
return id_priv_dev;
}
}
}
return ERR_PTR(-EINVAL);
}
static struct rdma_id_private *cma_id_from_event(struct ib_cm_id *cm_id,
struct ib_cm_event *ib_event)
{
struct cma_req_info req;
struct rdma_bind_list *bind_list;
struct rdma_id_private *id_priv;
struct net_device *net_dev;
int err;
err = cma_save_req_info(ib_event, &req);
if (err)
return ERR_PTR(err);
net_dev = cma_get_net_dev(ib_event, &req);
if (IS_ERR(net_dev)) {
if (PTR_ERR(net_dev) == -EAFNOSUPPORT) {
/* Assuming the protocol is AF_IB */
net_dev = NULL;
} else {
return ERR_CAST(net_dev);
}
}
bind_list = cma_ps_find(rdma_ps_from_service_id(req.service_id),
cma_port_from_service_id(req.service_id));
id_priv = cma_find_listener(bind_list, cm_id, ib_event, &req, net_dev);
dev_put(net_dev);
return id_priv;
}
static inline int cma_user_data_offset(struct rdma_id_private *id_priv)
{
return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr);
......@@ -1399,7 +1578,10 @@ static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
struct rdma_cm_event event;
int offset, ret;
listen_id = cm_id->context;
listen_id = cma_id_from_event(cm_id, ib_event);
if (IS_ERR(listen_id))
return PTR_ERR(listen_id);
if (!cma_check_req_qp_type(&listen_id->id, ib_event))
return -EINVAL;
......
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