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SubjectRe: [PATCH v5 14/27] IB/Verbs: Reform cma_acquire_dev()


On 04/21/2015 08:15 AM, Devesh Sharma wrote:
> Looks good, I would like to test with ocrdma before confirming.

That's great :-) Any testing would be really helpful, please let
us know if there is some thing broken.

Regards,
Michael Wang

>
>> -----Original Message-----
>> From: linux-rdma-owner@vger.kernel.org [mailto:linux-rdma-
>> owner@vger.kernel.org] On Behalf Of Michael Wang
>> Sent: Monday, April 20, 2015 2:08 PM
>> To: Roland Dreier; Sean Hefty; linux-rdma@vger.kernel.org; linux-
>> kernel@vger.kernel.org; hal@dev.mellanox.co.il
>> Cc: Michael Wang; Tom Tucker; Steve Wise; Hoang-Nam Nguyen; Christoph
>> Raisch; Mike Marciniszyn; Eli Cohen; Faisal Latif; Jack Morgenstein; Or Gerlitz;
>> Haggai Eran; Ira Weiny; Tom Talpey; Jason Gunthorpe; Doug Ledford
>> Subject: [PATCH v5 14/27] IB/Verbs: Reform cma_acquire_dev()
>>
>>
>> Reform cma_acquire_dev() with management helpers, introduce
>> cma_validate_port() to make the code more clean.
>>
>> Cc: Hal Rosenstock <hal@dev.mellanox.co.il>
>> Cc: Steve Wise <swise@opengridcomputing.com>
>> Cc: Tom Talpey <tom@talpey.com>
>> Cc: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
>> Cc: Doug Ledford <dledford@redhat.com>
>> Cc: Ira Weiny <ira.weiny@intel.com>
>> Cc: Sean Hefty <sean.hefty@intel.com>
>> Signed-off-by: Michael Wang <yun.wang@profitbricks.com>
>> ---
>> drivers/infiniband/core/cma.c | 68 +++++++++++++++++++++++++----------------
>> --
>> 1 file changed, 40 insertions(+), 28 deletions(-)
>>
>> diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
>> index 6195bf6..44e7bb9 100644
>> --- a/drivers/infiniband/core/cma.c
>> +++ b/drivers/infiniband/core/cma.c
>> @@ -370,18 +370,35 @@ static int cma_translate_addr(struct sockaddr *addr,
>> struct rdma_dev_addr *dev_a
>> return ret;
>> }
>>
>> +static inline int cma_validate_port(struct ib_device *device, u8 port,
>> + union ib_gid *gid, int dev_type) {
>> + u8 found_port;
>> + int ret = -ENODEV;
>> +
>> + if ((dev_type == ARPHRD_INFINIBAND) && !rdma_tech_ib(device,
>> port))
>> + return ret;
>> +
>> + if ((dev_type != ARPHRD_INFINIBAND) && rdma_tech_ib(device, port))
>> + return ret;
>> +
>> + ret = ib_find_cached_gid(device, gid, &found_port, NULL);
>> + if (port != found_port)
>> + return -ENODEV;
>> +
>> + return ret;
>> +}
>> +
>> static int cma_acquire_dev(struct rdma_id_private *id_priv,
>> struct rdma_id_private *listen_id_priv) {
>> struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
>> struct cma_device *cma_dev;
>> - union ib_gid gid, iboe_gid;
>> + union ib_gid gid, iboe_gid, *gidp;
>> int ret = -ENODEV;
>> - u8 port, found_port;
>> - enum rdma_link_layer dev_ll = dev_addr->dev_type ==
>> ARPHRD_INFINIBAND ?
>> - IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET;
>> + u8 port;
>>
>> - if (dev_ll != IB_LINK_LAYER_INFINIBAND &&
>> + if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
>> id_priv->id.ps == RDMA_PS_IPOIB)
>> return -EINVAL;
>>
>> @@ -391,41 +408,36 @@ static int cma_acquire_dev(struct rdma_id_private
>> *id_priv,
>>
>> memcpy(&gid, dev_addr->src_dev_addr +
>> rdma_addr_gid_offset(dev_addr), sizeof gid);
>> - if (listen_id_priv &&
>> - rdma_port_get_link_layer(listen_id_priv->id.device,
>> - listen_id_priv->id.port_num) == dev_ll) {
>> +
>> + if (listen_id_priv) {
>> cma_dev = listen_id_priv->cma_dev;
>> port = listen_id_priv->id.port_num;
>> - if (rdma_node_get_transport(cma_dev->device->node_type)
>> == RDMA_TRANSPORT_IB &&
>> - rdma_port_get_link_layer(cma_dev->device, port) ==
>> IB_LINK_LAYER_ETHERNET)
>> - ret = ib_find_cached_gid(cma_dev->device, &iboe_gid,
>> - &found_port, NULL);
>> - else
>> - ret = ib_find_cached_gid(cma_dev->device, &gid,
>> - &found_port, NULL);
>> + gidp = rdma_tech_iboe(cma_dev->device, port) ?
>> + &iboe_gid : &gid;
>>
>> - if (!ret && (port == found_port)) {
>> - id_priv->id.port_num = found_port;
>> + ret = cma_validate_port(cma_dev->device, port, gidp,
>> + dev_addr->dev_type);
>> + if (!ret) {
>> + id_priv->id.port_num = port;
>> goto out;
>> }
>> }
>> +
>> list_for_each_entry(cma_dev, &dev_list, list) {
>> for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port)
>> {
>> if (listen_id_priv &&
>> listen_id_priv->cma_dev == cma_dev &&
>> listen_id_priv->id.port_num == port)
>> continue;
>> - if (rdma_port_get_link_layer(cma_dev->device, port)
>> == dev_ll) {
>> - if (rdma_node_get_transport(cma_dev-
>>> device->node_type) == RDMA_TRANSPORT_IB &&
>> - rdma_port_get_link_layer(cma_dev-
>>> device, port) == IB_LINK_LAYER_ETHERNET)
>> - ret = ib_find_cached_gid(cma_dev-
>>> device, &iboe_gid, &found_port, NULL);
>> - else
>> - ret = ib_find_cached_gid(cma_dev-
>>> device, &gid, &found_port, NULL);
>> -
>> - if (!ret && (port == found_port)) {
>> - id_priv->id.port_num = found_port;
>> - goto out;
>> - }
>> +
>> + gidp = rdma_tech_iboe(cma_dev->device, port) ?
>> + &iboe_gid : &gid;
>> +
>> + ret = cma_validate_port(cma_dev->device, port, gidp,
>> + dev_addr->dev_type);
>> + if (!ret) {
>> + id_priv->id.port_num = port;
>> + goto out;
>> }
>> }
>> }
>> --
>> 2.1.0
>> --
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