diff options
Diffstat (limited to 'drivers/infiniband/core')
| -rw-r--r-- | drivers/infiniband/core/nldev.c | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/drivers/infiniband/core/nldev.c b/drivers/infiniband/core/nldev.c index 5d790c507c7e..c37bb041f647 100644 --- a/drivers/infiniband/core/nldev.c +++ b/drivers/infiniband/core/nldev.c @@ -31,6 +31,8 @@ */ #include <linux/module.h> +#include <linux/pid.h> +#include <linux/pid_namespace.h> #include <net/netlink.h> #include <rdma/rdma_netlink.h> @@ -52,6 +54,11 @@ static const struct nla_policy nldev_policy[RDMA_NLDEV_ATTR_MAX] = { [RDMA_NLDEV_ATTR_PORT_STATE] = { .type = NLA_U8 }, [RDMA_NLDEV_ATTR_PORT_PHYS_STATE] = { .type = NLA_U8 }, [RDMA_NLDEV_ATTR_DEV_NODE_TYPE] = { .type = NLA_U8 }, + [RDMA_NLDEV_ATTR_RES_SUMMARY] = { .type = NLA_NESTED }, + [RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY] = { .type = NLA_NESTED }, + [RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_NAME] = { .type = NLA_NUL_STRING, + .len = 16 }, + [RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_CURR] = { .type = NLA_U64 }, }; static int fill_nldev_handle(struct sk_buff *msg, struct ib_device *device) @@ -134,6 +141,65 @@ static int fill_port_info(struct sk_buff *msg, return 0; } +static int fill_res_info_entry(struct sk_buff *msg, + const char *name, u64 curr) +{ + struct nlattr *entry_attr; + + entry_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY); + if (!entry_attr) + return -EMSGSIZE; + + if (nla_put_string(msg, RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_NAME, name)) + goto err; + if (nla_put_u64_64bit(msg, + RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_CURR, curr, 0)) + goto err; + + nla_nest_end(msg, entry_attr); + return 0; + +err: + nla_nest_cancel(msg, entry_attr); + return -EMSGSIZE; +} + +static int fill_res_info(struct sk_buff *msg, struct ib_device *device) +{ + static const char * const names[RDMA_RESTRACK_MAX] = { + [RDMA_RESTRACK_PD] = "pd", + [RDMA_RESTRACK_CQ] = "cq", + [RDMA_RESTRACK_QP] = "qp", + }; + + struct rdma_restrack_root *res = &device->res; + struct nlattr *table_attr; + int ret, i, curr; + + if (fill_nldev_handle(msg, device)) + return -EMSGSIZE; + + table_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_RES_SUMMARY); + if (!table_attr) + return -EMSGSIZE; + + for (i = 0; i < RDMA_RESTRACK_MAX; i++) { + if (!names[i]) + continue; + curr = rdma_restrack_count(res, i, task_active_pid_ns(current)); + ret = fill_res_info_entry(msg, names[i], curr); + if (ret) + goto err; + } + + nla_nest_end(msg, table_attr); + return 0; + +err: + nla_nest_cancel(msg, table_attr); + return ret; +} + static int nldev_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh, struct netlink_ext_ack *extack) { @@ -329,6 +395,83 @@ out: return skb->len; } +static int nldev_res_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh, + struct netlink_ext_ack *extack) +{ + struct nlattr *tb[RDMA_NLDEV_ATTR_MAX]; + struct ib_device *device; + struct sk_buff *msg; + u32 index; + int ret; + + ret = nlmsg_parse(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1, + nldev_policy, extack); + if (ret || !tb[RDMA_NLDEV_ATTR_DEV_INDEX]) + return -EINVAL; + + index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]); + device = ib_device_get_by_index(index); + if (!device) + return -EINVAL; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + goto err; + + nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq, + RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_RES_GET), + 0, 0); + + ret = fill_res_info(msg, device); + if (ret) + goto err_free; + + nlmsg_end(msg, nlh); + put_device(&device->dev); + return rdma_nl_unicast(msg, NETLINK_CB(skb).portid); + +err_free: + nlmsg_free(msg); +err: + put_device(&device->dev); + return ret; +} + +static int _nldev_res_get_dumpit(struct ib_device *device, + struct sk_buff *skb, + struct netlink_callback *cb, + unsigned int idx) +{ + int start = cb->args[0]; + struct nlmsghdr *nlh; + + if (idx < start) + return 0; + + nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, + RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_RES_GET), + 0, NLM_F_MULTI); + + if (fill_res_info(skb, device)) { + nlmsg_cancel(skb, nlh); + goto out; + } + + nlmsg_end(skb, nlh); + + idx++; + +out: + cb->args[0] = idx; + return skb->len; +} + +static int nldev_res_get_dumpit(struct sk_buff *skb, + struct netlink_callback *cb) +{ + return ib_enum_all_devs(_nldev_res_get_dumpit, skb, cb); +} + static const struct rdma_nl_cbs nldev_cb_table[RDMA_NLDEV_NUM_OPS] = { [RDMA_NLDEV_CMD_GET] = { .doit = nldev_get_doit, @@ -338,6 +481,10 @@ static const struct rdma_nl_cbs nldev_cb_table[RDMA_NLDEV_NUM_OPS] = { .doit = nldev_port_get_doit, .dump = nldev_port_get_dumpit, }, + [RDMA_NLDEV_CMD_RES_GET] = { + .doit = nldev_res_get_doit, + .dump = nldev_res_get_dumpit, + }, }; void __init nldev_init(void) |