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IB/srpt: Move the code for parsing struct ib_cm_req_event_param 

This patch does not change any functionality but makes srpt_cm_req_recv()
independent of the IB/CM and hence simplifies the patch that introduces
RDMA/CM support.

Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Bart Van Assche 2018-01-16 16:14:17 -08:00 committed by Doug Ledford
parent 090fa24bf2
commit 2ffcf04263
1 changed files with 30 additions and 19 deletions
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49
drivers/infiniband/ulp/srpt/ib_srpt.c
View File

@ -2028,20 +2028,22 @@ static void srpt_release_channel_work(struct work_struct *w)
/**
* srpt_cm_req_recv - process the event IB_CM_REQ_RECEIVED
* @cm_id: IB/CM connection identifier.
* @param: IB/CM REQ parameters.
* @private_data: IB/CM REQ private data.
* @port_num: Port through which the IB/CM REQ message was received.
* @pkey: P_Key of the incoming connection.
* @req: SRP login request.
* @src_addr: GID of the port that submitted the login request.
*
* Ownership of the cm_id is transferred to the target session if this
* functions returns zero. Otherwise the caller remains the owner of cm_id.
*/
static int srpt_cm_req_recv(struct ib_cm_id *cm_id,
struct ib_cm_req_event_param *param,
void *private_data)
u8 port_num, __be16 pkey,
const struct srp_login_req *req,
const char *src_addr)
{
struct srpt_device *sdev = cm_id->context;
struct srpt_port *sport = &sdev->port[param->port - 1];
struct srpt_port *sport = &sdev->port[port_num - 1];
struct srpt_nexus *nexus;
struct srp_login_req *req;
struct srp_login_rsp *rsp = NULL;
struct srp_login_rej *rej = NULL;
struct ib_cm_rep_param *rep_param = NULL;
@ -2052,17 +2054,14 @@ static int srpt_cm_req_recv(struct ib_cm_id *cm_id,
WARN_ON_ONCE(irqs_disabled());
if (WARN_ON(!sdev || !private_data))
if (WARN_ON(!sdev || !req))
return -EINVAL;
req = (struct srp_login_req *)private_data;
it_iu_len = be32_to_cpu(req->req_it_iu_len);
pr_info("Received SRP_LOGIN_REQ with i_port_id %pI6, t_port_id %pI6 and it_iu_len %d on port %d (guid=%pI6); pkey %#04x\n",
req->initiator_port_id, req->target_port_id, it_iu_len,
param->port, &sport->gid,
be16_to_cpu(param->primary_path->pkey));
port_num, &sport->gid, be16_to_cpu(pkey));
nexus = srpt_get_nexus(sport, req->initiator_port_id,
req->target_port_id);
@ -2090,7 +2089,7 @@ static int srpt_cm_req_recv(struct ib_cm_id *cm_id,
if (!sport->enabled) {
rej->reason = cpu_to_be32(SRP_LOGIN_REJ_INSUFFICIENT_RESOURCES);
pr_info("rejected SRP_LOGIN_REQ because target port %s_%d has not yet been enabled\n",
sport->sdev->device->name, param->port);
sport->sdev->device->name, port_num);
goto reject;
}
@ -2113,11 +2112,11 @@ static int srpt_cm_req_recv(struct ib_cm_id *cm_id,
init_rcu_head(&ch->rcu);
kref_init(&ch->kref);
ch->pkey = be16_to_cpu(param->primary_path->pkey);
ch->pkey = be16_to_cpu(pkey);
ch->nexus = nexus;
ch->zw_cqe.done = srpt_zerolength_write_done;
INIT_WORK(&ch->release_work, srpt_release_channel_work);
ch->sport = &sdev->port[param->port - 1];
ch->sport = sport;
ch->ib_cm.cm_id = cm_id;
cm_id->context = ch;
/*
@ -2169,8 +2168,7 @@ static int srpt_cm_req_recv(struct ib_cm_id *cm_id,
goto free_recv_ring;
}
srpt_format_guid(ch->sess_name, sizeof(ch->sess_name),
&param->primary_path->dgid.global.interface_id);
strlcpy(ch->sess_name, src_addr, sizeof(ch->sess_name));
snprintf(i_port_id, sizeof(i_port_id), "0x%016llx%016llx",
be64_to_cpu(*(__be64 *)nexus->i_port_id),
be64_to_cpu(*(__be64 *)(nexus->i_port_id + 8)));
@ -2224,7 +2222,7 @@ static int srpt_cm_req_recv(struct ib_cm_id *cm_id,
rej->reason = cpu_to_be32(
SRP_LOGIN_REJ_INSUFFICIENT_RESOURCES);
pr_info("rejected SRP_LOGIN_REQ because target %s_%d is not enabled\n",
sdev->device->name, param->port);
sdev->device->name, port_num);
mutex_unlock(&sport->mutex);
goto reject;
}
@ -2327,6 +2325,19 @@ out:
return ret;
}
static int srpt_ib_cm_req_recv(struct ib_cm_id *cm_id,
struct ib_cm_req_event_param *param,
void *private_data)
{
char sguid[40];
srpt_format_guid(sguid, sizeof(sguid),
&param->primary_path->dgid.global.interface_id);
return srpt_cm_req_recv(cm_id, param->port, param->primary_path->pkey,
private_data, sguid);
}
static void srpt_cm_rej_recv(struct srpt_rdma_ch *ch,
enum ib_cm_rej_reason reason,
const u8 *private_data,
@ -2401,8 +2412,8 @@ static int srpt_cm_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event)
ret = 0;
switch (event->event) {
case IB_CM_REQ_RECEIVED:
ret = srpt_cm_req_recv(cm_id, &event->param.req_rcvd,
event->private_data);
ret = srpt_ib_cm_req_recv(cm_id, &event->param.req_rcvd,
event->private_data);
break;
case IB_CM_REJ_RECEIVED:
srpt_cm_rej_recv(ch, event->param.rej_rcvd.reason,