mirror of https://gitee.com/openkylin/linux.git
RDMA/nldev: Add resource tracker doit callback
Implement doit callbacks and ensure that users won't provide port values on resource entry allocated in per-device mode needed for .doit callback. Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Leon Romanovsky
Jason Gunthorpe
parent
18c4c66f76
commit
c5dfe0ea6f
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@ -375,7 +375,6 @@ static int fill_res_qp_entry(struct sk_buff *msg, bool has_cap_net_admin,
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struct ib_qp *qp = container_of(res, struct ib_qp, res);
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struct ib_device *dev = qp->device;
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struct ib_qp_init_attr qp_init_attr;
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struct nlattr *entry_attr;
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struct ib_qp_attr qp_attr;
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int ret;
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@ -384,11 +383,7 @@ static int fill_res_qp_entry(struct sk_buff *msg, bool has_cap_net_admin,
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return ret;
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if (port && port != qp_attr.port_num)
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return 0;
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entry_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_RES_QP_ENTRY);
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if (!entry_attr)
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goto out;
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return -EAGAIN;
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/* In create_qp() port is not set yet */
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if (qp_attr.port_num &&
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@ -426,13 +421,9 @@ static int fill_res_qp_entry(struct sk_buff *msg, bool has_cap_net_admin,
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if (fill_res_entry(dev, msg, res))
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goto err;
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nla_nest_end(msg, entry_attr);
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return 0;
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err:
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nla_nest_cancel(msg, entry_attr);
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out:
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return -EMSGSIZE;
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err: return -EMSGSIZE;
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}
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static int fill_res_cm_id_entry(struct sk_buff *msg, bool has_cap_net_admin,
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@ -442,15 +433,10 @@ static int fill_res_cm_id_entry(struct sk_buff *msg, bool has_cap_net_admin,
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container_of(res, struct rdma_id_private, res);
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struct ib_device *dev = id_priv->id.device;
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struct rdma_cm_id *cm_id = &id_priv->id;
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struct nlattr *entry_attr;
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if (port && port != cm_id->port_num)
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return 0;
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entry_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_RES_CM_ID_ENTRY);
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if (!entry_attr)
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goto out;
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if (cm_id->port_num &&
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nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, cm_id->port_num))
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goto err;
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@ -485,13 +471,9 @@ static int fill_res_cm_id_entry(struct sk_buff *msg, bool has_cap_net_admin,
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if (fill_res_entry(dev, msg, res))
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goto err;
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nla_nest_end(msg, entry_attr);
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return 0;
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err:
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nla_nest_cancel(msg, entry_attr);
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out:
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return -EMSGSIZE;
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err: return -EMSGSIZE;
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}
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static int fill_res_cq_entry(struct sk_buff *msg, bool has_cap_net_admin,
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@ -499,11 +481,6 @@ static int fill_res_cq_entry(struct sk_buff *msg, bool has_cap_net_admin,
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{
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struct ib_cq *cq = container_of(res, struct ib_cq, res);
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struct ib_device *dev = cq->device;
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struct nlattr *entry_attr;
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entry_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_RES_CQ_ENTRY);
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if (!entry_attr)
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goto out;
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if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_CQE, cq->cqe))
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goto err;
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@ -522,13 +499,9 @@ static int fill_res_cq_entry(struct sk_buff *msg, bool has_cap_net_admin,
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if (fill_res_entry(dev, msg, res))
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goto err;
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nla_nest_end(msg, entry_attr);
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return 0;
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err:
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nla_nest_cancel(msg, entry_attr);
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out:
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return -EMSGSIZE;
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err: return -EMSGSIZE;
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}
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static int fill_res_mr_entry(struct sk_buff *msg, bool has_cap_net_admin,
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@ -536,11 +509,6 @@ static int fill_res_mr_entry(struct sk_buff *msg, bool has_cap_net_admin,
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{
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struct ib_mr *mr = container_of(res, struct ib_mr, res);
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struct ib_device *dev = mr->pd->device;
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struct nlattr *entry_attr;
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entry_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_RES_MR_ENTRY);
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if (!entry_attr)
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goto out;
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if (has_cap_net_admin) {
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if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_RKEY, mr->rkey))
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@ -559,13 +527,9 @@ static int fill_res_mr_entry(struct sk_buff *msg, bool has_cap_net_admin,
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if (fill_res_entry(dev, msg, res))
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goto err;
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nla_nest_end(msg, entry_attr);
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return 0;
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err:
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nla_nest_cancel(msg, entry_attr);
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out:
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return -EMSGSIZE;
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err: return -EMSGSIZE;
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}
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static int fill_res_pd_entry(struct sk_buff *msg, bool has_cap_net_admin,
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@ -573,11 +537,6 @@ static int fill_res_pd_entry(struct sk_buff *msg, bool has_cap_net_admin,
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{
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struct ib_pd *pd = container_of(res, struct ib_pd, res);
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struct ib_device *dev = pd->device;
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struct nlattr *entry_attr;
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entry_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_RES_PD_ENTRY);
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if (!entry_attr)
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goto out;
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if (has_cap_net_admin) {
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if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_LOCAL_DMA_LKEY,
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@ -598,13 +557,9 @@ static int fill_res_pd_entry(struct sk_buff *msg, bool has_cap_net_admin,
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if (fill_res_entry(dev, msg, res))
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goto err;
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nla_nest_end(msg, entry_attr);
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return 0;
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err:
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nla_nest_cancel(msg, entry_attr);
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out:
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return -EMSGSIZE;
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err: return -EMSGSIZE;
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}
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static int nldev_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
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@ -916,6 +871,13 @@ struct nldev_fill_res_entry {
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struct rdma_restrack_entry *res, u32 port);
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enum rdma_nldev_attr nldev_attr;
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enum rdma_nldev_command nldev_cmd;
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u8 flags;
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u32 entry;
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u32 id;
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};
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enum nldev_res_flags {
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NLDEV_PER_DEV = 1 << 0,
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};
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static const struct nldev_fill_res_entry fill_entries[RDMA_RESTRACK_MAX] = {
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@ -923,26 +885,34 @@ static const struct nldev_fill_res_entry fill_entries[RDMA_RESTRACK_MAX] = {
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.fill_res_func = fill_res_qp_entry,
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.nldev_cmd = RDMA_NLDEV_CMD_RES_QP_GET,
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.nldev_attr = RDMA_NLDEV_ATTR_RES_QP,
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.entry = RDMA_NLDEV_ATTR_RES_QP_ENTRY,
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},
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[RDMA_RESTRACK_CM_ID] = {
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.fill_res_func = fill_res_cm_id_entry,
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.nldev_cmd = RDMA_NLDEV_CMD_RES_CM_ID_GET,
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.nldev_attr = RDMA_NLDEV_ATTR_RES_CM_ID,
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.entry = RDMA_NLDEV_ATTR_RES_CM_ID_ENTRY,
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},
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[RDMA_RESTRACK_CQ] = {
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.fill_res_func = fill_res_cq_entry,
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.nldev_cmd = RDMA_NLDEV_CMD_RES_CQ_GET,
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.nldev_attr = RDMA_NLDEV_ATTR_RES_CQ,
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.flags = NLDEV_PER_DEV,
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.entry = RDMA_NLDEV_ATTR_RES_CQ_ENTRY,
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},
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[RDMA_RESTRACK_MR] = {
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.fill_res_func = fill_res_mr_entry,
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.nldev_cmd = RDMA_NLDEV_CMD_RES_MR_GET,
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.nldev_attr = RDMA_NLDEV_ATTR_RES_MR,
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.flags = NLDEV_PER_DEV,
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.entry = RDMA_NLDEV_ATTR_RES_MR_ENTRY,
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},
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[RDMA_RESTRACK_PD] = {
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.fill_res_func = fill_res_pd_entry,
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.nldev_cmd = RDMA_NLDEV_CMD_RES_PD_GET,
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.nldev_attr = RDMA_NLDEV_ATTR_RES_PD,
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.flags = NLDEV_PER_DEV,
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.entry = RDMA_NLDEV_ATTR_RES_PD_ENTRY,
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},
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};
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@ -957,6 +927,89 @@ static bool is_visible_in_pid_ns(struct rdma_restrack_entry *res)
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return task_active_pid_ns(current) == task_active_pid_ns(res->task);
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}
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static int res_get_common_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
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struct netlink_ext_ack *extack,
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enum rdma_restrack_type res_type)
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{
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const struct nldev_fill_res_entry *fe = &fill_entries[res_type];
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struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
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struct rdma_restrack_entry *res;
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struct ib_device *device;
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u32 index, id, port = 0;
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bool has_cap_net_admin;
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struct sk_buff *msg;
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int ret;
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ret = nlmsg_parse(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
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nldev_policy, extack);
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if (ret || !tb[RDMA_NLDEV_ATTR_DEV_INDEX] || !fe->id || !tb[fe->id])
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return -EINVAL;
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index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
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device = ib_device_get_by_index(index);
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if (!device)
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return -EINVAL;
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if (tb[RDMA_NLDEV_ATTR_PORT_INDEX]) {
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port = nla_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
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if (!rdma_is_port_valid(device, port)) {
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ret = -EINVAL;
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goto err;
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}
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}
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if ((port && fe->flags & NLDEV_PER_DEV) ||
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(!port && ~fe->flags & NLDEV_PER_DEV)) {
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ret = -EINVAL;
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goto err;
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}
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id = nla_get_u32(tb[fe->id]);
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res = rdma_restrack_get_byid(device, res_type, id);
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if (IS_ERR(res)) {
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ret = PTR_ERR(res);
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goto err;
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}
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if (!is_visible_in_pid_ns(res)) {
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ret = -ENOENT;
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goto err_get;
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}
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msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
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if (!msg) {
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ret = -ENOMEM;
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goto err;
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}
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nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
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RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, fe->nldev_cmd),
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0, 0);
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if (fill_nldev_handle(msg, device)) {
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ret = -EMSGSIZE;
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goto err_free;
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}
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has_cap_net_admin = netlink_capable(skb, CAP_NET_ADMIN);
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ret = fe->fill_res_func(msg, has_cap_net_admin, res, port);
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rdma_restrack_put(res);
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if (ret)
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goto err_free;
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nlmsg_end(msg, nlh);
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ib_device_put(device);
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return rdma_nl_unicast(msg, NETLINK_CB(skb).portid);
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err_free:
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nlmsg_free(msg);
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err_get:
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rdma_restrack_put(res);
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err:
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ib_device_put(device);
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return ret;
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}
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static int res_get_common_dumpit(struct sk_buff *skb,
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struct netlink_callback *cb,
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enum rdma_restrack_type res_type)
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@ -966,6 +1019,7 @@ static int res_get_common_dumpit(struct sk_buff *skb,
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struct rdma_restrack_entry *res;
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int err, ret = 0, idx = 0;
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struct nlattr *table_attr;
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struct nlattr *entry_attr;
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struct ib_device *device;
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int start = cb->args[0];
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bool has_cap_net_admin;
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@ -1043,7 +1097,15 @@ static int res_get_common_dumpit(struct sk_buff *skb,
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filled = true;
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entry_attr = nla_nest_start(skb, fe->entry);
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if (!entry_attr) {
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ret = -EMSGSIZE;
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rdma_restrack_put(res);
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up_read(&device->res.rwsem);
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break;
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}
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up_read(&device->res.rwsem);
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ret = fe->fill_res_func(skb, has_cap_net_admin, res, port);
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down_read(&device->res.rwsem);
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/*
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@ -1052,10 +1114,15 @@ static int res_get_common_dumpit(struct sk_buff *skb,
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*/
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rdma_restrack_put(res);
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if (ret)
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nla_nest_cancel(skb, entry_attr);
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if (ret == -EMSGSIZE)
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break;
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if (ret == -EAGAIN)
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goto next;
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if (ret)
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goto res_err;
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nla_nest_end(skb, entry_attr);
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next: idx++;
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}
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up_read(&device->res.rwsem);
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@ -1091,6 +1158,12 @@ next: idx++;
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struct netlink_callback *cb) \
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{ \
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return res_get_common_dumpit(skb, cb, type); \
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} \
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static int nldev_res_get_##name##_doit(struct sk_buff *skb, \
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struct nlmsghdr *nlh, \
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struct netlink_ext_ack *extack) \
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{ \
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return res_get_common_doit(skb, nlh, extack, type); \
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}
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RES_GET_FUNCS(qp, RDMA_RESTRACK_QP);
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@ -1117,28 +1190,23 @@ static const struct rdma_nl_cbs nldev_cb_table[RDMA_NLDEV_NUM_OPS] = {
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.dump = nldev_res_get_dumpit,
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},
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[RDMA_NLDEV_CMD_RES_QP_GET] = {
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.doit = nldev_res_get_qp_doit,
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.dump = nldev_res_get_qp_dumpit,
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/*
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* .doit is not implemented yet for two reasons:
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* 1. It is not needed yet.
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* 2. There is a need to provide identifier, while it is easy
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* for the QPs (device index + port index + LQPN), it is not
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* the case for the rest of resources (PD and CQ). Because it
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* is better to provide similar interface for all resources,
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* let's wait till we will have other resources implemented
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* too.
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*/
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},
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[RDMA_NLDEV_CMD_RES_CM_ID_GET] = {
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.doit = nldev_res_get_cm_id_doit,
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.dump = nldev_res_get_cm_id_dumpit,
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},
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[RDMA_NLDEV_CMD_RES_CQ_GET] = {
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.doit = nldev_res_get_cq_doit,
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.dump = nldev_res_get_cq_dumpit,
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},
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[RDMA_NLDEV_CMD_RES_MR_GET] = {
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.doit = nldev_res_get_mr_doit,
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.dump = nldev_res_get_mr_dumpit,
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},
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[RDMA_NLDEV_CMD_RES_PD_GET] = {
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.doit = nldev_res_get_pd_doit,
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.dump = nldev_res_get_pd_dumpit,
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},
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};
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