diff options
author | Sean Hefty <sean.hefty@intel.com> | 2012-06-14 20:31:39 (GMT) |
---|---|---|
committer | Roland Dreier <roland@purestorage.com> | 2012-07-09 01:02:24 (GMT) |
commit | 68602120e496a31d8e3b36d0bfc7d9d2456fb05c (patch) | |
tree | 04eea1c0673ff60d1e9881b1d73785c0ed6f8271 /drivers/infiniband/core/cma.c | |
parent | 406b6a25f85271397739a7e9f5af1df665b8a0d0 (diff) | |
download | linux-fsl-qoriq-68602120e496a31d8e3b36d0bfc7d9d2456fb05c.tar.xz |
RDMA/cma: Allow user to restrict listens to bound address family
Provide an option for the user to specify that listens should only
accept connections where the incoming address family matches that of
the locally bound address. This is used to support the equivalent of
IPV6_V6ONLY socket option, which allows an app to only accept
connection requests directed to IPv6 addresses.
Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband/core/cma.c')
-rw-r--r-- | drivers/infiniband/core/cma.c | 35 |
1 files changed, 31 insertions, 4 deletions
diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c index 454e7ea..8734a6a 100644 --- a/drivers/infiniband/core/cma.c +++ b/drivers/infiniband/core/cma.c @@ -99,6 +99,10 @@ struct rdma_bind_list { unsigned short port; }; +enum { + CMA_OPTION_AFONLY, +}; + /* * Device removal can occur at anytime, so we need extra handling to * serialize notifying the user of device removal with other callbacks. @@ -137,6 +141,7 @@ struct rdma_id_private { u32 qkey; u32 qp_num; pid_t owner; + u32 options; u8 srq; u8 tos; u8 reuseaddr; @@ -2104,6 +2109,26 @@ int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse) } EXPORT_SYMBOL(rdma_set_reuseaddr); +int rdma_set_afonly(struct rdma_cm_id *id, int afonly) +{ + struct rdma_id_private *id_priv; + unsigned long flags; + int ret; + + id_priv = container_of(id, struct rdma_id_private, id); + spin_lock_irqsave(&id_priv->lock, flags); + if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) { + id_priv->options |= (1 << CMA_OPTION_AFONLY); + id_priv->afonly = afonly; + ret = 0; + } else { + ret = -EINVAL; + } + spin_unlock_irqrestore(&id_priv->lock, flags); + return ret; +} +EXPORT_SYMBOL(rdma_set_afonly); + static void cma_bind_port(struct rdma_bind_list *bind_list, struct rdma_id_private *id_priv) { @@ -2379,12 +2404,14 @@ int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr) } memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr)); - if (addr->sa_family == AF_INET) - id_priv->afonly = 1; + if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) { + if (addr->sa_family == AF_INET) + id_priv->afonly = 1; #if IS_ENABLED(CONFIG_IPV6) - else if (addr->sa_family == AF_INET6) - id_priv->afonly = init_net.ipv6.sysctl.bindv6only; + else if (addr->sa_family == AF_INET6) + id_priv->afonly = init_net.ipv6.sysctl.bindv6only; #endif + } ret = cma_get_port(id_priv); if (ret) goto err2; |