From: Parav Pandit <parav@xxxxxxxxxxxx>
Add an interface via netlink command to query whether rdma devices are
shared among multiple net namespaces or not. When using RDMAtool, it can
be queried as,
$rdma system show netns
netns shared
Signed-off-by: Parav Pandit <parav@xxxxxxxxxxxx>
Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxxxx>
---
drivers/infiniband/core/core_priv.h | 1 +
drivers/infiniband/core/device.c | 2 +-
drivers/infiniband/core/nldev.c | 32 +++++++++++++++++++++++++++++
include/uapi/rdma/rdma_netlink.h | 9 +++++++-
4 files changed, 42 insertions(+), 2 deletions(-)
diff --git a/drivers/infiniband/core/core_priv.h b/drivers/infiniband/core/core_priv.h
index fe5607ebca80..30c7d4a46b76 100644
--- a/drivers/infiniband/core/core_priv.h
+++ b/drivers/infiniband/core/core_priv.h
@@ -55,6 +55,7 @@ struct pkey_index_qp_list {
};
extern const struct attribute_group ib_dev_attr_group;
+extern bool ib_devices_shared_netns;
int ib_device_register_sysfs(struct ib_device *device);
void ib_device_unregister_sysfs(struct ib_device *device);
diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c
index a7a59d2dd248..d87e3ce98f93 100644
--- a/drivers/infiniband/core/device.c
+++ b/drivers/infiniband/core/device.c
@@ -127,7 +127,7 @@ static DEFINE_XARRAY_FLAGS(rdma_nets, XA_FLAGS_ALLOC);
*/
static DECLARE_RWSEM(rdma_nets_rwsem);
-static bool ib_devices_shared_netns = true;
+bool ib_devices_shared_netns = true;
module_param_named(netns_mode, ib_devices_shared_netns, bool, 0444);
MODULE_PARM_DESC(netns_mode,
"Share device among net namespaces; default=1 (shared)");
diff --git a/drivers/infiniband/core/nldev.c b/drivers/infiniband/core/nldev.c
index 4a81558b464b..2c216c7ef676 100644
--- a/drivers/infiniband/core/nldev.c
+++ b/drivers/infiniband/core/nldev.c
@@ -116,6 +116,7 @@ static const struct nla_policy nldev_policy[RDMA_NLDEV_ATTR_MAX] = {
[RDMA_NLDEV_ATTR_RES_CTXN] = { .type = NLA_U32 },
[RDMA_NLDEV_ATTR_LINK_TYPE] = { .type = NLA_NUL_STRING,
.len = RDMA_NLDEV_ATTR_ENTRY_STRLEN },
+ [RDMA_NLDEV_SYS_ATTR_NETNS_MODE] = { .type = NLA_U8 },
};
static int put_driver_name_print_type(struct sk_buff *msg, const char *name,
@@ -1331,6 +1332,34 @@ static int nldev_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
return 0;
}
+static int nldev_get_sys_get_dumpit(struct sk_buff *skb,
+ struct netlink_callback *cb)
+{
+ struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
+ struct nlmsghdr *nlh;
+ int err;
+
+ err = nlmsg_parse(cb->nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
+ nldev_policy, NULL);
+ if (err)
+ return err;
+
+ nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
+ RDMA_NL_GET_TYPE(RDMA_NL_NLDEV,
+ RDMA_NLDEV_CMD_SYS_GET),
+ 0, 0);
+
+ err = nla_put_u8(skb, RDMA_NLDEV_SYS_ATTR_NETNS_MODE,
+ (u8)ib_devices_shared_netns);
+ if (err) {
+ nlmsg_cancel(skb, nlh);
+ return err;
+ }
+
+ nlmsg_end(skb, nlh);
+ return skb->len;
+}
+
static const struct rdma_nl_cbs nldev_cb_table[RDMA_NLDEV_NUM_OPS] = {
[RDMA_NLDEV_CMD_GET] = {
.doit = nldev_get_doit,
@@ -1376,6 +1405,9 @@ static const struct rdma_nl_cbs nldev_cb_table[RDMA_NLDEV_NUM_OPS] = {
.doit = nldev_res_get_pd_doit,
.dump = nldev_res_get_pd_dumpit,
},
+ [RDMA_NLDEV_CMD_SYS_GET] = {
+ .dump = nldev_get_sys_get_dumpit,
+ },
};
void __init nldev_init(void)
diff --git a/include/uapi/rdma/rdma_netlink.h b/include/uapi/rdma/rdma_netlink.h
index 5cc592728071..6af88c736073 100644
--- a/include/uapi/rdma/rdma_netlink.h
+++ b/include/uapi/rdma/rdma_netlink.h
@@ -261,7 +261,8 @@ enum rdma_nldev_command {
RDMA_NLDEV_CMD_PORT_GET, /* can dump */
- /* 6 - 8 are free to use */
+ RDMA_NLDEV_CMD_SYS_GET, /* can dump */
+ /* 7 - 8 are free to use */
RDMA_NLDEV_CMD_RES_GET = 9, /* can dump */
@@ -472,6 +473,12 @@ enum rdma_nldev_attr {
*/
RDMA_NLDEV_ATTR_LINK_TYPE, /* string */
+ /*
+ * net namespace mode for rdma subsystem:
+ * either shared or exclusive among multiple net namespaces.
+ */
+ RDMA_NLDEV_SYS_ATTR_NETNS_MODE, /* u8 */
+
/*
* Always the end
*/
--
2.19.1
