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RDMA/nldev: provide detailed MR information 

Implement the RDMA nldev netlink interface for dumping detailed
MR information.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Steve Wise 2018-03-01 13:58:13 -08:00 committed by Doug Ledford
parent e6f0330106
commit fccec5b89a
7 changed files with 102 additions and 13 deletions
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56
drivers/infiniband/core/nldev.c
View File

@ -85,6 +85,12 @@ static const struct nla_policy nldev_policy[RDMA_NLDEV_ATTR_MAX] = {
[RDMA_NLDEV_ATTR_RES_CQE] = { .type = NLA_U32 },
[RDMA_NLDEV_ATTR_RES_USECNT] = { .type = NLA_U64 },
[RDMA_NLDEV_ATTR_RES_POLL_CTX] = { .type = NLA_U8 },
[RDMA_NLDEV_ATTR_RES_MR] = { .type = NLA_NESTED },
[RDMA_NLDEV_ATTR_RES_MR_ENTRY] = { .type = NLA_NESTED },
[RDMA_NLDEV_ATTR_RES_RKEY] = { .type = NLA_U32 },
[RDMA_NLDEV_ATTR_RES_LKEY] = { .type = NLA_U32 },
[RDMA_NLDEV_ATTR_RES_IOVA] = { .type = NLA_U64 },
[RDMA_NLDEV_ATTR_RES_MRLEN] = { .type = NLA_U64 },
};
static int fill_nldev_handle(struct sk_buff *msg, struct ib_device *device)
@ -197,6 +203,7 @@ static int fill_res_info(struct sk_buff *msg, struct ib_device *device)
[RDMA_RESTRACK_CQ] = "cq",
[RDMA_RESTRACK_QP] = "qp",
[RDMA_RESTRACK_CM_ID] = "cm_id",
[RDMA_RESTRACK_MR] = "mr",
};
struct rdma_restrack_root *res = &device->res;
@ -397,6 +404,41 @@ static int fill_res_cq_entry(struct sk_buff *msg, struct netlink_callback *cb,
return -EMSGSIZE;
}
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 nlattr *entry_attr;
entry_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_RES_MR_ENTRY);
if (!entry_attr)
goto out;
if (netlink_capable(cb->skb, CAP_NET_ADMIN)) {
if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_RKEY, mr->rkey))
goto err;
if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_LKEY, mr->lkey))
goto err;
if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_RES_IOVA,
mr->iova, 0))
goto err;
}
if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_RES_MRLEN, mr->length, 0))
goto err;
if (fill_res_name_pid(msg, res))
goto err;
nla_nest_end(msg, entry_attr);
return 0;
err:
nla_nest_cancel(msg, entry_attr);
out:
return -EMSGSIZE;
}
static int nldev_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
struct netlink_ext_ack *extack)
{
@ -694,6 +736,11 @@ static const struct nldev_fill_res_entry fill_entries[RDMA_RESTRACK_MAX] = {
.nldev_cmd = RDMA_NLDEV_CMD_RES_CQ_GET,
.nldev_attr = RDMA_NLDEV_ATTR_RES_CQ,
},
[RDMA_RESTRACK_MR] = {
.fill_res_func = fill_res_mr_entry,
.nldev_cmd = RDMA_NLDEV_CMD_RES_MR_GET,
.nldev_attr = RDMA_NLDEV_ATTR_RES_MR,
},
};
static int res_get_common_dumpit(struct sk_buff *skb,
@ -848,6 +895,12 @@ static int nldev_res_get_cq_dumpit(struct sk_buff *skb,
return res_get_common_dumpit(skb, cb, RDMA_RESTRACK_CQ);
}
static int nldev_res_get_mr_dumpit(struct sk_buff *skb,
struct netlink_callback *cb)
{
return res_get_common_dumpit(skb, cb, RDMA_RESTRACK_MR);
}
static const struct rdma_nl_cbs nldev_cb_table[RDMA_NLDEV_NUM_OPS] = {
[RDMA_NLDEV_CMD_GET] = {
.doit = nldev_get_doit,
@ -880,6 +933,9 @@ static const struct rdma_nl_cbs nldev_cb_table[RDMA_NLDEV_NUM_OPS] = {
[RDMA_NLDEV_CMD_RES_CQ_GET] = {
.dump = nldev_res_get_cq_dumpit,
},
[RDMA_NLDEV_CMD_RES_MR_GET] = {
.dump = nldev_res_get_mr_dumpit,
},
};
void __init nldev_init(void)

36
drivers/infiniband/core/restrack.c
View File

@ -43,22 +43,28 @@ EXPORT_SYMBOL(rdma_restrack_count);
static void set_kern_name(struct rdma_restrack_entry *res)
{
enum rdma_restrack_type type = res->type;
struct ib_qp *qp;
struct ib_pd *pd;
if (type != RDMA_RESTRACK_QP)
/* Other types already have this name embedded in */
return;
qp = container_of(res, struct ib_qp, res);
if (!qp->pd) {
WARN_ONCE(true, "XRC QPs are not supported\n");
/* Survive, despite the programmer's error */
res->kern_name = " ";
return;
switch (res->type) {
case RDMA_RESTRACK_QP:
pd = container_of(res, struct ib_qp, res)->pd;
if (!pd) {
WARN_ONCE(true, "XRC QPs are not supported\n");
/* Survive, despite the programmer's error */
res->kern_name = " ";
}
break;
case RDMA_RESTRACK_MR:
pd = container_of(res, struct ib_mr, res)->pd;
break;
default:
/* Other types set kern_name directly */
pd = NULL;
break;
}
res->kern_name = qp->pd->res.kern_name;
if (pd)
res->kern_name = pd->res.kern_name;
}
static struct ib_device *res_to_dev(struct rdma_restrack_entry *res)
@ -73,6 +79,8 @@ static struct ib_device *res_to_dev(struct rdma_restrack_entry *res)
case RDMA_RESTRACK_CM_ID:
return container_of(res, struct rdma_id_private,
res)->id.device;
case RDMA_RESTRACK_MR:
return container_of(res, struct ib_mr, res)->device;
default:
WARN_ONCE(true, "Wrong resource tracking type %u\n", res->type);
return NULL;
@ -90,6 +98,8 @@ static bool res_is_user(struct rdma_restrack_entry *res)
return container_of(res, struct ib_qp, res)->uobject;
case RDMA_RESTRACK_CM_ID:
return !res->kern_name;
case RDMA_RESTRACK_MR:
return container_of(res, struct ib_mr, res)->pd->uobject;
default:
WARN_ONCE(true, "Wrong resource tracking type %u\n", res->type);
return false;

2
drivers/infiniband/core/uverbs_cmd.c
View File

@ -693,6 +693,8 @@ ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
mr->pd = pd;
mr->uobject = uobj;
atomic_inc(&pd->usecnt);
mr->res.type = RDMA_RESTRACK_MR;
rdma_restrack_add(&mr->res);
uobj->object = mr;

3
drivers/infiniband/core/verbs.c
View File

@ -1622,6 +1622,7 @@ int ib_dereg_mr(struct ib_mr *mr)
struct ib_pd *pd = mr->pd;
int ret;
rdma_restrack_del(&mr->res);
ret = mr->device->dereg_mr(mr);
if (!ret)
atomic_dec(&pd->usecnt);
@ -1658,6 +1659,8 @@ struct ib_mr *ib_alloc_mr(struct ib_pd *pd,
mr->uobject = NULL;
atomic_inc(&pd->usecnt);
mr->need_inval = false;
mr->res.type = RDMA_RESTRACK_MR;
rdma_restrack_add(&mr->res);
}
return mr;

5
include/rdma/ib_verbs.h
View File

@ -1772,6 +1772,11 @@ struct ib_mr {
struct ib_uobject *uobject; /* user */
struct list_head qp_entry; /* FR */
};
/*
* Implementation details of the RDMA core, don't use in drivers:
*/
struct rdma_restrack_entry res;
};
struct ib_mw {

4
include/rdma/restrack.h
View File

@ -33,6 +33,10 @@ enum rdma_restrack_type {
* @RDMA_RESTRACK_CM_ID: Connection Manager ID (CM_ID)
*/
RDMA_RESTRACK_CM_ID,
/**
* @RDMA_RESTRACK_MR: Memory Region (MR)
*/
RDMA_RESTRACK_MR,
/**
* @RDMA_RESTRACK_MAX: Last entry, used for array dclarations
*/

9
include/uapi/rdma/rdma_netlink.h
View File

@ -242,6 +242,8 @@ enum rdma_nldev_command {
RDMA_NLDEV_CMD_RES_CQ_GET, /* can dump */
RDMA_NLDEV_CMD_RES_MR_GET, /* can dump */
RDMA_NLDEV_NUM_OPS
};
@ -372,6 +374,13 @@ enum rdma_nldev_attr {
RDMA_NLDEV_ATTR_RES_USECNT, /* u64 */
RDMA_NLDEV_ATTR_RES_POLL_CTX, /* u8 */
RDMA_NLDEV_ATTR_RES_MR, /* nested table */
RDMA_NLDEV_ATTR_RES_MR_ENTRY, /* nested table */
RDMA_NLDEV_ATTR_RES_RKEY, /* u32 */
RDMA_NLDEV_ATTR_RES_LKEY, /* u32 */
RDMA_NLDEV_ATTR_RES_IOVA, /* u64 */
RDMA_NLDEV_ATTR_RES_MRLEN, /* u64 */
RDMA_NLDEV_ATTR_MAX
};
#endif /* _UAPI_RDMA_NETLINK_H */