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RDMA/cma: Update port reservation to support AF_IB 

The AF_IB uses a 64-bit service id (SID), which the user can control
through the use of a mask.  The rdma_cm will assign values to the
unmasked portions of the SID based on the selected port space and port
number.

Because the IB spec divides the SID range into several regions, a
SID/mask combination may fall into one of the existing port space
ranges as defined by the RDMA CM IP Annex.  Map the AF_IB SID to the
correct RDMA port space.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Sean Hefty 2013-05-29 10:09:11 -07:00 committed by Roland Dreier
parent ef560861c0
commit 58afdcb738
2 changed files with 94 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

113
drivers/infiniband/core/cma.c
View File

@ -729,12 +729,22 @@ static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
}
}
static inline __be16 cma_port(struct sockaddr *addr)
static __be16 cma_port(struct sockaddr *addr)
{
if (addr->sa_family == AF_INET)
struct sockaddr_ib *sib;
switch (addr->sa_family) {
case AF_INET:
return ((struct sockaddr_in *) addr)->sin_port;
else
case AF_INET6:
return ((struct sockaddr_in6 *) addr)->sin6_port;
case AF_IB:
sib = (struct sockaddr_ib *) addr;
return htons((u16) (be64_to_cpu(sib->sib_sid) &
be64_to_cpu(sib->sib_sid_mask)));
default:
return 0;
}
}
static inline int cma_any_port(struct sockaddr *addr)
@ -2139,10 +2149,29 @@ EXPORT_SYMBOL(rdma_set_afonly);
static void cma_bind_port(struct rdma_bind_list *bind_list,
struct rdma_id_private *id_priv)
{
struct sockaddr_in *sin;
struct sockaddr *addr;
struct sockaddr_ib *sib;
u64 sid, mask;
__be16 port;
sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
sin->sin_port = htons(bind_list->port);
addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
port = htons(bind_list->port);
switch (addr->sa_family) {
case AF_INET:
((struct sockaddr_in *) addr)->sin_port = port;
break;
case AF_INET6:
((struct sockaddr_in6 *) addr)->sin6_port = port;
break;
case AF_IB:
sib = (struct sockaddr_ib *) addr;
sid = be64_to_cpu(sib->sib_sid);
mask = be64_to_cpu(sib->sib_sid_mask);
sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port));
sib->sib_sid_mask = cpu_to_be64(~0ULL);
break;
}
id_priv->bind_list = bind_list;
hlist_add_head(&id_priv->node, &bind_list->owners);
}
@ -2269,30 +2298,66 @@ static int cma_bind_listen(struct rdma_id_private *id_priv)
return ret;
}
static struct idr *cma_select_inet_ps(struct rdma_id_private *id_priv)
{
switch (id_priv->id.ps) {
case RDMA_PS_SDP:
return &sdp_ps;
case RDMA_PS_TCP:
return &tcp_ps;
case RDMA_PS_UDP:
return &udp_ps;
case RDMA_PS_IPOIB:
return &ipoib_ps;
case RDMA_PS_IB:
return &ib_ps;
default:
return NULL;
}
}
static struct idr *cma_select_ib_ps(struct rdma_id_private *id_priv)
{
struct idr *ps = NULL;
struct sockaddr_ib *sib;
u64 sid_ps, mask, sid;
sib = (struct sockaddr_ib *) &id_priv->id.route.addr.src_addr;
mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK;
sid = be64_to_cpu(sib->sib_sid) & mask;
if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) {
sid_ps = RDMA_IB_IP_PS_IB;
ps = &ib_ps;
} else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) &&
(sid == (RDMA_IB_IP_PS_TCP & mask))) {
sid_ps = RDMA_IB_IP_PS_TCP;
ps = &tcp_ps;
} else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) &&
(sid == (RDMA_IB_IP_PS_UDP & mask))) {
sid_ps = RDMA_IB_IP_PS_UDP;
ps = &udp_ps;
}
if (ps) {
sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib)));
sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK |
be64_to_cpu(sib->sib_sid_mask));
}
return ps;
}
static int cma_get_port(struct rdma_id_private *id_priv)
{
struct idr *ps;
int ret;
switch (id_priv->id.ps) {
case RDMA_PS_SDP:
ps = &sdp_ps;
break;
case RDMA_PS_TCP:
ps = &tcp_ps;
break;
case RDMA_PS_UDP:
ps = &udp_ps;
break;
case RDMA_PS_IPOIB:
ps = &ipoib_ps;
break;
case RDMA_PS_IB:
ps = &ib_ps;
break;
default:
if (id_priv->id.route.addr.src_addr.ss_family != AF_IB)
ps = cma_select_inet_ps(id_priv);
else
ps = cma_select_ib_ps(id_priv);
if (!ps)
return -EPROTONOSUPPORT;
}
mutex_lock(&lock);
if (cma_any_port((struct sockaddr *) &id_priv->id.route.addr.src_addr))

5
include/rdma/rdma_cm.h
View File

@ -70,6 +70,11 @@ enum rdma_port_space {
RDMA_PS_UDP = 0x0111,
};
#define RDMA_IB_IP_PS_MASK 0xFFFFFFFFFFFF0000ULL
#define RDMA_IB_IP_PS_TCP 0x0000000001060000ULL
#define RDMA_IB_IP_PS_UDP 0x0000000001110000ULL
#define RDMA_IB_IP_PS_IB 0x00000000013F0000ULL
struct rdma_addr {
struct sockaddr_storage src_addr;
struct sockaddr_storage dst_addr;