[PATCH for-3.17 3/5] ib/mad: Add dev_notice messages for various umad/mad registration failures

ira.weiny-ral2JQCrhuEAvxtiuMwx3w
2014-08-08T23:00:54Z

Registration failures can be difficult to debug from userspace. This gives
more visibility.

Signed-off-by: Ira Weiny <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
drivers/infiniband/core/mad.c | 58 ++++++++++++++++++++++++++++++++------
drivers/infiniband/core/user_mad.c | 8 ++++++
2 files changed, 57 insertions(+), 9 deletions(-)

diff --git a/drivers/infiniband/core/mad.c b/drivers/infiniband/core/mad.c
index 272680f..63f9457 100644
--- a/drivers/infiniband/core/mad.c
+++ b/drivers/infiniband/core/mad.c
@@ -214,58 +214,95 @@ struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device,

/* Validate parameters */
qpn = get_spl_qp_index(qp_type);
- if (qpn == -1)
+ if (qpn == -1) {
+ dev_notice(&device->dev,
+ "ib_register_mad_agent: invalid QP Type %d\n",
+ qp_type);
goto error1;
+ }

- if (rmpp_version && rmpp_version != IB_MGMT_RMPP_VERSION)
+ if (rmpp_version && rmpp_version != IB_MGMT_RMPP_VERSION) {
+ dev_notice(&device->dev,
+ "ib_register_mad_agent: invalid RMPP Version %u\n",
+ rmpp_version);
goto error1;
+ }

/* Validate MAD registration request if supplied */
if (mad_reg_req) {
- if (mad_reg_req->mgmt_class_version >= MAX_MGMT_VERSION)
+ if (mad_reg_req->mgmt_class_version >= MAX_MGMT_VERSION) {
+ dev_notice(&device->dev,
+ "ib_register_mad_agent: invalid Class Version %u\n",
+ mad_reg_req->mgmt_class_version);
goto error1;
- if (!recv_handler)
+ }
+ if (!recv_handler) {
+ dev_notice(&device->dev,
+ "ib_register_mad_agent: no recv_handler\n");
goto error1;
+ }
if (mad_reg_req->mgmt_class >= MAX_MGMT_CLASS) {
/*
* IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE is the only
* one in this range currently allowed
*/
if (mad_reg_req->mgmt_class !=
- IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
+ IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
+ dev_notice(&device->dev,
+ "ib_register_mad_agent: Invalid Mgmt Class 0x%x\n",
+ mad_reg_req->mgmt_class);
goto error1;
+ }
} else if (mad_reg_req->mgmt_class == 0) {
/*
* Class 0 is reserved in IBA and is used for
* aliasing of IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
*/
+ dev_notice(&device->dev,
+ "ib_register_mad_agent: Invalid Mgmt Class 0\n");
goto error1;
} else if (is_vendor_class(mad_reg_req->mgmt_class)) {
/*
* If class is in "new" vendor range,
* ensure supplied OUI is not zero
*/
- if (!is_vendor_oui(mad_reg_req->oui))
+ if (!is_vendor_oui(mad_reg_req->oui)) {
+ dev_notice(&device->dev,
+ "ib_register_mad_agent: No OUI specified for class 0x%x\n",
+ mad_reg_req->mgmt_class);
goto error1;
+ }
}
/* Make sure class supplied is consistent with RMPP */
if (!ib_is_mad_class_rmpp(mad_reg_req->mgmt_class)) {
- if (rmpp_version)
+ if (rmpp_version) {
+ dev_notice(&device->dev,
+ "ib_register_mad_agent: RMPP version for non-RMPP class 0x%x\n",
+ mad_reg_req->mgmt_class);
goto error1;
+ }
}
/* Make sure class supplied is consistent with QP type */
if (qp_type == IB_QPT_SMI) {
if ((mad_reg_req->mgmt_class !=
IB_MGMT_CLASS_SUBN_LID_ROUTED) &&
(mad_reg_req->mgmt_class !=
- IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE))
+ IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) {
+ dev_notice(&device->dev,
+ "ib_register_mad_agent: Invalid SM QP type: class 0x%x\n",
+ mad_reg_req->mgmt_class);
goto error1;
+ }
} else {
if ((mad_reg_req->mgmt_class ==
IB_MGMT_CLASS_SUBN_LID_ROUTED) ||
(mad_reg_req->mgmt_class ==
- IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE))
+ IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) {
+ dev_notice(&device->dev,
+ "ib_register_mad_agent: Invalid GS QP type: class 0x%x\n",
+ mad_reg_req->mgmt_class);
goto error1;
+ }
}
} else {
/* No registration request supplied */
@@ -276,6 +313,7 @@ struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device,
/* Validate device and port */
port_priv = ib_get_mad_port(device, port_num);
if (!port_priv) {
+ dev_notice(&device->dev, "ib_register_mad_agent: Invalid port\n");
ret = ERR_PTR(-ENODEV);
goto error1;
}
@@ -283,6 +321,8 @@ struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device,
/* Verify the QP requested is supported. For example, Ethernet devices
* will not have QP0 */
if (!port_priv->qp_info[qpn].qp) {
+ dev_notice(&device->dev,
+ "ib_register_mad_agent: QP %d not supported\n", qpn);
ret = ERR_PTR(-EPROTONOSUPPORT);
goto error1;
}
diff --git a/drivers/infiniband/core/user_mad.c b/drivers/infiniband/core/user_mad.c
index 6be596d..ea90a3e 100644
--- a/drivers/infiniband/core/user_mad.c
+++ b/drivers/infiniband/core/user_mad.c
@@ -616,6 +616,8 @@ static int ib_umad_reg_agent(struct ib_umad_file *file, void __user *arg,
mutex_lock(&file->mutex);

if (!file->port->ib_dev) {
+ dev_notice(file->port->dev,
+ "ib_umad_reg_agent: invalid device\n");
ret = -EPIPE;
goto out;
}
@@ -626,6 +628,9 @@ static int ib_umad_reg_agent(struct ib_umad_file *file, void __user *arg,
}

if (ureq.qpn != 0 && ureq.qpn != 1) {
+ dev_notice(file->port->dev,
+ "ib_umad_reg_agent: invalid QPN %d specified\n",
+ ureq.qpn);
ret = -EINVAL;
goto out;
}
@@ -634,6 +639,9 @@ static int ib_umad_reg_agent(struct ib_umad_file *file, void __user *arg,
if (!__get_agent(file, agent_id))
goto found;

+ dev_notice(file->port->dev,
+ "ib_umad_reg_agent: Max Agents (%u) reached\n",
+ IB_UMAD_MAX_AGENTS);
ret = -ENOMEM;