Each provider can register a "fill entry" function with the restrack core.
This function will be called when filling out a resource, allowing the
provider to add provider-specific details. The details consist of a
nltable of nested attributes, that are in the form of <key, [print-type],
value> tuples. Both key and value attributes are mandatory. The key
nlattr must be a string, and the value nlattr can be one of the provider
attributes that are generic, but typed, allowing the attributes to be
validated. Currently the provider nlattr types include string, s32,
u32, s64, and u64. The print-type nlattr allows a provider to specify
an alternative display format for user tools displaying the attribute.
For example, a u32 attribute will default to "%u", but a print-type
attribute can be included for it to be displayed in hex. This allows
the user tool to print the number in the format desired by the provider
driver.
More attrs can be defined as they become needed by providers.
Signed-off-by: Steve Wise <swise@xxxxxxxxxxxxxxxxxxxxx>
---
drivers/infiniband/core/nldev.c | 38 ++++++++++++++++++++++++++++++++++++++
include/rdma/restrack.h | 10 ++++++++++
include/uapi/rdma/rdma_netlink.h | 21 +++++++++++++++++++++
3 files changed, 69 insertions(+)
diff --git a/drivers/infiniband/core/nldev.c b/drivers/infiniband/core/nldev.c
index 884843e..99df8d4 100644
--- a/drivers/infiniband/core/nldev.c
+++ b/drivers/infiniband/core/nldev.c
@@ -95,8 +95,26 @@
[RDMA_NLDEV_ATTR_RES_PD_ENTRY] = { .type = NLA_NESTED },
[RDMA_NLDEV_ATTR_RES_LOCAL_DMA_LKEY] = { .type = NLA_U32 },
[RDMA_NLDEV_ATTR_RES_UNSAFE_GLOBAL_RKEY] = { .type = NLA_U32 },
+ [RDMA_NLDEV_ATTR_PROVIDER] = { .type = NLA_NESTED },
+ [RDMA_NLDEV_ATTR_PROVIDER_ENTRY] = { .type = NLA_NESTED },
+ [RDMA_NLDEV_ATTR_PROVIDER_STRING] = { .type = NLA_NUL_STRING,
+ .len = RDMA_NLDEV_ATTR_ENTRY_STRLEN },
+ [RDMA_NLDEV_ATTR_PROVIDER_PRINT_TYPE] = { .type = NLA_U8 },
+ [RDMA_NLDEV_ATTR_PROVIDER_S32] = { .type = NLA_S32 },
+ [RDMA_NLDEV_ATTR_PROVIDER_U32] = { .type = NLA_U32 },
+ [RDMA_NLDEV_ATTR_PROVIDER_S64] = { .type = NLA_S64 },
+ [RDMA_NLDEV_ATTR_PROVIDER_U64] = { .type = NLA_U64 },
};
+static int provider_fill_res_entry(struct rdma_restrack_root *resroot,
+ struct sk_buff *msg,
+ struct netlink_callback *cb,
+ struct rdma_restrack_entry *res)
+{
+ return resroot->fill_res_entry ?
+ resroot->fill_res_entry(msg, cb, res) : 0;
+}
+
static int fill_nldev_handle(struct sk_buff *msg, struct ib_device *device)
{
if (nla_put_u32(msg, RDMA_NLDEV_ATTR_DEV_INDEX, device->index))
@@ -264,6 +282,7 @@ static int fill_res_qp_entry(struct sk_buff *msg, struct netlink_callback *cb,
struct rdma_restrack_entry *res, uint32_t port)
{
struct ib_qp *qp = container_of(res, struct ib_qp, res);
+ struct rdma_restrack_root *resroot = &qp->device->res;
struct ib_qp_init_attr qp_init_attr;
struct nlattr *entry_attr;
struct ib_qp_attr qp_attr;
@@ -313,6 +332,9 @@ static int fill_res_qp_entry(struct sk_buff *msg, struct netlink_callback *cb,
if (fill_res_name_pid(msg, res))
goto err;
+ if (provider_fill_res_entry(resroot, msg, cb, res))
+ goto err;
+
nla_nest_end(msg, entry_attr);
return 0;
@@ -328,6 +350,7 @@ static int fill_res_cm_id_entry(struct sk_buff *msg,
{
struct rdma_id_private *id_priv =
container_of(res, struct rdma_id_private, res);
+ struct rdma_restrack_root *resroot = &id_priv->id.device->res;
struct rdma_cm_id *cm_id = &id_priv->id;
struct nlattr *entry_attr;
@@ -369,6 +392,9 @@ static int fill_res_cm_id_entry(struct sk_buff *msg,
if (fill_res_name_pid(msg, res))
goto err;
+ if (provider_fill_res_entry(resroot, msg, cb, res))
+ goto err;
+
nla_nest_end(msg, entry_attr);
return 0;
@@ -382,6 +408,7 @@ static int fill_res_cq_entry(struct sk_buff *msg, struct netlink_callback *cb,
struct rdma_restrack_entry *res, uint32_t port)
{
struct ib_cq *cq = container_of(res, struct ib_cq, res);
+ struct rdma_restrack_root *resroot = &cq->device->res;
struct nlattr *entry_attr;
entry_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_RES_CQ_ENTRY);
@@ -402,6 +429,9 @@ static int fill_res_cq_entry(struct sk_buff *msg, struct netlink_callback *cb,
if (fill_res_name_pid(msg, res))
goto err;
+ if (provider_fill_res_entry(resroot, msg, cb, res))
+ goto err;
+
nla_nest_end(msg, entry_attr);
return 0;
@@ -415,6 +445,7 @@ static int fill_res_mr_entry(struct sk_buff *msg, struct netlink_callback *cb,
struct rdma_restrack_entry *res, uint32_t port)
{
struct ib_mr *mr = container_of(res, struct ib_mr, res);
+ struct rdma_restrack_root *resroot = &mr->pd->device->res;
struct nlattr *entry_attr;
entry_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_RES_MR_ENTRY);
@@ -438,6 +469,9 @@ static int fill_res_mr_entry(struct sk_buff *msg, struct netlink_callback *cb,
if (fill_res_name_pid(msg, res))
goto err;
+ if (provider_fill_res_entry(resroot, msg, cb, res))
+ goto err;
+
nla_nest_end(msg, entry_attr);
return 0;
@@ -451,6 +485,7 @@ static int fill_res_pd_entry(struct sk_buff *msg, struct netlink_callback *cb,
struct rdma_restrack_entry *res, uint32_t port)
{
struct ib_pd *pd = container_of(res, struct ib_pd, res);
+ struct rdma_restrack_root *resroot = &pd->device->res;
struct nlattr *entry_attr;
entry_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_RES_PD_ENTRY);
@@ -477,6 +512,9 @@ static int fill_res_pd_entry(struct sk_buff *msg, struct netlink_callback *cb,
if (fill_res_name_pid(msg, res))
goto err;
+ if (provider_fill_res_entry(resroot, msg, cb, res))
+ goto err;
+
nla_nest_end(msg, entry_attr);
return 0;
diff --git a/include/rdma/restrack.h b/include/rdma/restrack.h
index f3b3e35..bd3cd9a 100644
--- a/include/rdma/restrack.h
+++ b/include/rdma/restrack.h
@@ -44,6 +44,8 @@ enum rdma_restrack_type {
};
#define RDMA_RESTRACK_HASH_BITS 8
+struct rdma_restrack_entry;
+
/**
* struct rdma_restrack_root - main resource tracking management
* entity, per-device
@@ -57,6 +59,14 @@ struct rdma_restrack_root {
* @hash: global database for all resources per-device
*/
DECLARE_HASHTABLE(hash, RDMA_RESTRACK_HASH_BITS);
+ /**
+ * @fill_res_entry: provider-specific fill function
+ *
+ * Allows rdma providers to add their own restrack attributes.
+ */
+ int (*fill_res_entry)(struct sk_buff *msg,
+ struct netlink_callback *cb,
+ struct rdma_restrack_entry *entry);
};
/**
diff --git a/include/uapi/rdma/rdma_netlink.h b/include/uapi/rdma/rdma_netlink.h
index 84b3f63..b953e9d 100644
--- a/include/uapi/rdma/rdma_netlink.h
+++ b/include/uapi/rdma/rdma_netlink.h
@@ -249,6 +249,16 @@ enum rdma_nldev_command {
RDMA_NLDEV_NUM_OPS
};
+enum {
+ RDMA_NLDEV_ATTR_ENTRY_STRLEN = 16,
+};
+
+enum rdma_nldev_print_type {
+ RDMA_NLDEV_PRINT_TYPE_UNSPEC,
+ RDMA_NLDEV_PRINT_TYPE_HEX,
+ RDMA_NLDEV_PRINT_TYPE_BIN,
+};
+
enum rdma_nldev_attr {
/* don't change the order or add anything between, this is ABI! */
RDMA_NLDEV_ATTR_UNSPEC,
@@ -390,6 +400,17 @@ enum rdma_nldev_attr {
RDMA_NLDEV_ATTR_RES_PD_ENTRY, /* nested table */
RDMA_NLDEV_ATTR_RES_LOCAL_DMA_LKEY, /* u32 */
RDMA_NLDEV_ATTR_RES_UNSAFE_GLOBAL_RKEY, /* u32 */
+ /*
+ * provider-specific attributes.
+ */
+ RDMA_NLDEV_ATTR_PROVIDER, /* nested table */
+ RDMA_NLDEV_ATTR_PROVIDER_ENTRY, /* nested table */
+ RDMA_NLDEV_ATTR_PROVIDER_STRING, /* string */
+ RDMA_NLDEV_ATTR_PROVIDER_PRINT_TYPE, /* u8 */
+ RDMA_NLDEV_ATTR_PROVIDER_S32, /* s32 */
+ RDMA_NLDEV_ATTR_PROVIDER_U32, /* u32 */
+ RDMA_NLDEV_ATTR_PROVIDER_S64, /* s64 */
+ RDMA_NLDEV_ATTR_PROVIDER_U64, /* u64 */
RDMA_NLDEV_ATTR_MAX
};
--
1.8.3.1
--
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