forked from Minki/linux
RDMA/cma: Multiple path records support with netlink channel
Support receiving inbound and outbound IB path records (along with GMP PathRecord) from user-space service through the RDMA netlink channel. The LIDs in these 3 PRs can be used in this way: 1. GMP PR: used as the standard local/remote LIDs; 2. DLID of outbound PR: Used as the "dlid" field for outbound traffic; 3. DLID of inbound PR: Used as the "dlid" field for outbound traffic in responder side. This is aimed to support adaptive routing. With current IB routing solution when a packet goes out it's assigned with a fixed DLID per target, meaning a fixed router will be used. The LIDs in inbound/outbound path records can be used to identify group of routers that allow communication with another subnet's entity. With them packets from an inter-subnet connection may travel through any router in the set to reach the target. As confirmed with Jason, when sending a netlink request, kernel uses LS_RESOLVE_PATH_USE_ALL so that the service knows kernel supports multiple PRs. Signed-off-by: Mark Zhang <markzhang@nvidia.com> Reviewed-by: Mark Bloch <mbloch@nvidia.com> Link: https://lore.kernel.org/r/2fa2b6c93c4c16c8915bac3cfc4f27be1d60519d.1662631201.git.leonro@nvidia.com Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Mark Zhang
Leon Romanovsky
parent
bf9a992851
commit
5a37494933
@ -2026,6 +2026,8 @@ static void _destroy_id(struct rdma_id_private *id_priv,
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cma_id_put(id_priv->id.context);
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kfree(id_priv->id.route.path_rec);
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kfree(id_priv->id.route.path_rec_inbound);
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kfree(id_priv->id.route.path_rec_outbound);
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put_net(id_priv->id.route.addr.dev_addr.net);
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kfree(id_priv);
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@ -2817,26 +2819,72 @@ int rdma_set_min_rnr_timer(struct rdma_cm_id *id, u8 min_rnr_timer)
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}
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EXPORT_SYMBOL(rdma_set_min_rnr_timer);
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static void route_set_path_rec_inbound(struct cma_work *work,
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struct sa_path_rec *path_rec)
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{
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struct rdma_route *route = &work->id->id.route;
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if (!route->path_rec_inbound) {
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route->path_rec_inbound =
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kzalloc(sizeof(*route->path_rec_inbound), GFP_KERNEL);
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if (!route->path_rec_inbound)
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return;
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}
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*route->path_rec_inbound = *path_rec;
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}
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static void route_set_path_rec_outbound(struct cma_work *work,
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struct sa_path_rec *path_rec)
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{
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struct rdma_route *route = &work->id->id.route;
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if (!route->path_rec_outbound) {
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route->path_rec_outbound =
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kzalloc(sizeof(*route->path_rec_outbound), GFP_KERNEL);
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if (!route->path_rec_outbound)
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return;
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}
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*route->path_rec_outbound = *path_rec;
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}
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static void cma_query_handler(int status, struct sa_path_rec *path_rec,
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void *context)
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int num_prs, void *context)
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{
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struct cma_work *work = context;
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struct rdma_route *route;
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int i;
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route = &work->id->id.route;
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if (!status) {
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if (status)
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goto fail;
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for (i = 0; i < num_prs; i++) {
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if (!path_rec[i].flags || (path_rec[i].flags & IB_PATH_GMP))
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*route->path_rec = path_rec[i];
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else if (path_rec[i].flags & IB_PATH_INBOUND)
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route_set_path_rec_inbound(work, &path_rec[i]);
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else if (path_rec[i].flags & IB_PATH_OUTBOUND)
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route_set_path_rec_outbound(work, &path_rec[i]);
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}
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if (!route->path_rec) {
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status = -EINVAL;
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goto fail;
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}
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route->num_pri_alt_paths = 1;
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*route->path_rec = *path_rec;
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} else {
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queue_work(cma_wq, &work->work);
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return;
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fail:
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work->old_state = RDMA_CM_ROUTE_QUERY;
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work->new_state = RDMA_CM_ADDR_RESOLVED;
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work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
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work->event.status = status;
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pr_debug_ratelimited("RDMA CM: ROUTE_ERROR: failed to query path. status %d\n",
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status);
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}
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queue_work(cma_wq, &work->work);
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}
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@ -50,6 +50,7 @@
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#include <rdma/ib_marshall.h>
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#include <rdma/ib_addr.h>
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#include <rdma/opa_addr.h>
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#include <rdma/rdma_cm.h>
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#include "sa.h"
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#include "core_priv.h"
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@ -104,7 +105,8 @@ struct ib_sa_device {
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};
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struct ib_sa_query {
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void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *);
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void (*callback)(struct ib_sa_query *sa_query, int status,
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int num_prs, struct ib_sa_mad *mad);
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void (*release)(struct ib_sa_query *);
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struct ib_sa_client *client;
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struct ib_sa_port *port;
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@ -116,6 +118,12 @@ struct ib_sa_query {
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u32 seq; /* Local svc request sequence number */
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unsigned long timeout; /* Local svc timeout */
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u8 path_use; /* How will the pathrecord be used */
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/* A separate buffer to save pathrecords of a response, as in cases
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* like IB/netlink, mulptiple pathrecords are supported, so that
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* mad->data is not large enough to hold them
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*/
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void *resp_pr_data;
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};
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#define IB_SA_ENABLE_LOCAL_SERVICE 0x00000001
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@ -123,7 +131,8 @@ struct ib_sa_query {
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#define IB_SA_QUERY_OPA 0x00000004
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struct ib_sa_path_query {
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void (*callback)(int, struct sa_path_rec *, void *);
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void (*callback)(int status, struct sa_path_rec *rec,
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int num_paths, void *context);
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void *context;
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struct ib_sa_query sa_query;
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struct sa_path_rec *conv_pr;
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@ -712,7 +721,7 @@ static void ib_nl_set_path_rec_attrs(struct sk_buff *skb,
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if ((comp_mask & IB_SA_PATH_REC_REVERSIBLE) &&
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sa_rec->reversible != 0)
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query->path_use = LS_RESOLVE_PATH_USE_GMP;
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query->path_use = LS_RESOLVE_PATH_USE_ALL;
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else
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query->path_use = LS_RESOLVE_PATH_USE_UNIDIRECTIONAL;
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header->path_use = query->path_use;
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@ -865,15 +874,31 @@ static void send_handler(struct ib_mad_agent *agent,
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static void ib_nl_process_good_resolve_rsp(struct ib_sa_query *query,
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const struct nlmsghdr *nlh)
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{
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struct ib_path_rec_data *srec, *drec;
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struct ib_sa_path_query *path_query;
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struct ib_mad_send_wc mad_send_wc;
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struct ib_sa_mad *mad = NULL;
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const struct nlattr *head, *curr;
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struct ib_path_rec_data *rec;
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int len, rem;
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struct ib_sa_mad *mad = NULL;
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int len, rem, num_prs = 0;
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u32 mask = 0;
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int status = -EIO;
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if (query->callback) {
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if (!query->callback)
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goto out;
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path_query = container_of(query, struct ib_sa_path_query, sa_query);
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mad = query->mad_buf->mad;
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if (!path_query->conv_pr &&
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(be16_to_cpu(mad->mad_hdr.attr_id) == IB_SA_ATTR_PATH_REC)) {
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/* Need a larger buffer for possible multiple PRs */
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query->resp_pr_data = kvcalloc(RDMA_PRIMARY_PATH_MAX_REC_NUM,
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sizeof(*drec), GFP_KERNEL);
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if (!query->resp_pr_data) {
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query->callback(query, -ENOMEM, 0, NULL);
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return;
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}
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}
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head = (const struct nlattr *) nlmsg_data(nlh);
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len = nlmsg_len(nlh);
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switch (query->path_use) {
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@ -882,33 +907,48 @@ static void ib_nl_process_good_resolve_rsp(struct ib_sa_query *query,
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break;
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case LS_RESOLVE_PATH_USE_ALL:
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mask = IB_PATH_PRIMARY;
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break;
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case LS_RESOLVE_PATH_USE_GMP:
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default:
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mask = IB_PATH_PRIMARY | IB_PATH_GMP |
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IB_PATH_BIDIRECTIONAL;
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break;
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}
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drec = (struct ib_path_rec_data *)query->resp_pr_data;
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nla_for_each_attr(curr, head, len, rem) {
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if (curr->nla_type == LS_NLA_TYPE_PATH_RECORD) {
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rec = nla_data(curr);
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/*
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* Get the first one. In the future, we may
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* need to get up to 6 pathrecords.
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*/
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if ((rec->flags & mask) == mask) {
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mad = query->mad_buf->mad;
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mad->mad_hdr.method |=
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IB_MGMT_METHOD_RESP;
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memcpy(mad->data, rec->path_rec,
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sizeof(rec->path_rec));
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if (curr->nla_type != LS_NLA_TYPE_PATH_RECORD)
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continue;
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srec = nla_data(curr);
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if ((srec->flags & mask) != mask)
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continue;
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status = 0;
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if (!drec) {
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memcpy(mad->data, srec->path_rec,
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sizeof(srec->path_rec));
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num_prs = 1;
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break;
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}
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}
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}
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query->callback(query, status, mad);
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memcpy(drec, srec, sizeof(*drec));
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drec++;
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num_prs++;
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if (num_prs >= RDMA_PRIMARY_PATH_MAX_REC_NUM)
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break;
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}
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if (!status)
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mad->mad_hdr.method |= IB_MGMT_METHOD_RESP;
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query->callback(query, status, num_prs, mad);
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kvfree(query->resp_pr_data);
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query->resp_pr_data = NULL;
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out:
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mad_send_wc.send_buf = query->mad_buf;
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mad_send_wc.status = IB_WC_SUCCESS;
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send_handler(query->mad_buf->mad_agent, &mad_send_wc);
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@ -1411,25 +1451,12 @@ static int opa_pr_query_possible(struct ib_sa_client *client,
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return PR_IB_SUPPORTED;
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}
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static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
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int status,
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struct ib_sa_mad *mad)
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static void ib_sa_pr_callback_single(struct ib_sa_path_query *query,
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int status, struct ib_sa_mad *mad)
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{
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struct ib_sa_path_query *query =
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container_of(sa_query, struct ib_sa_path_query, sa_query);
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struct sa_path_rec rec = {};
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if (mad) {
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struct sa_path_rec rec;
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if (sa_query->flags & IB_SA_QUERY_OPA) {
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ib_unpack(opa_path_rec_table,
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ARRAY_SIZE(opa_path_rec_table),
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mad->data, &rec);
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rec.rec_type = SA_PATH_REC_TYPE_OPA;
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query->callback(status, &rec, query->context);
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} else {
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ib_unpack(path_rec_table,
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ARRAY_SIZE(path_rec_table),
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ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table),
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mad->data, &rec);
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rec.rec_type = SA_PATH_REC_TYPE_IB;
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sa_path_set_dmac_zero(&rec);
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@ -1439,13 +1466,75 @@ static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
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memset(&opa, 0, sizeof(struct sa_path_rec));
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sa_convert_path_ib_to_opa(&opa, &rec);
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query->callback(status, &opa, query->context);
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query->callback(status, &opa, 1, query->context);
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} else {
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query->callback(status, &rec, query->context);
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query->callback(status, &rec, 1, query->context);
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}
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}
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/**
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* ib_sa_pr_callback_multiple() - Parse path records then do callback.
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*
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* In a multiple-PR case the PRs are saved in "query->resp_pr_data"
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* (instead of"mad->data") and with "ib_path_rec_data" structure format,
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* so that rec->flags can be set to indicate the type of PR.
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* This is valid only in IB fabric.
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*/
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static void ib_sa_pr_callback_multiple(struct ib_sa_path_query *query,
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int status, int num_prs,
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struct ib_path_rec_data *rec_data)
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{
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struct sa_path_rec *rec;
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int i;
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rec = kvcalloc(num_prs, sizeof(*rec), GFP_KERNEL);
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if (!rec) {
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query->callback(-ENOMEM, NULL, 0, query->context);
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return;
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}
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for (i = 0; i < num_prs; i++) {
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ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table),
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rec_data[i].path_rec, rec + i);
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rec[i].rec_type = SA_PATH_REC_TYPE_IB;
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sa_path_set_dmac_zero(rec + i);
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rec[i].flags = rec_data[i].flags;
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}
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query->callback(status, rec, num_prs, query->context);
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kvfree(rec);
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}
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static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
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int status, int num_prs,
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struct ib_sa_mad *mad)
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{
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struct ib_sa_path_query *query =
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container_of(sa_query, struct ib_sa_path_query, sa_query);
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struct sa_path_rec rec;
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if (!mad || !num_prs) {
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query->callback(status, NULL, 0, query->context);
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return;
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}
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if (sa_query->flags & IB_SA_QUERY_OPA) {
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if (num_prs != 1) {
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query->callback(-EINVAL, NULL, 0, query->context);
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return;
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}
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ib_unpack(opa_path_rec_table, ARRAY_SIZE(opa_path_rec_table),
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mad->data, &rec);
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rec.rec_type = SA_PATH_REC_TYPE_OPA;
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query->callback(status, &rec, num_prs, query->context);
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} else {
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if (!sa_query->resp_pr_data)
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ib_sa_pr_callback_single(query, status, mad);
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else
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ib_sa_pr_callback_multiple(query, status, num_prs,
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sa_query->resp_pr_data);
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}
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} else
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query->callback(status, NULL, query->context);
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}
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static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
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@ -1489,7 +1578,7 @@ int ib_sa_path_rec_get(struct ib_sa_client *client,
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unsigned long timeout_ms, gfp_t gfp_mask,
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void (*callback)(int status,
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struct sa_path_rec *resp,
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void *context),
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int num_paths, void *context),
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void *context,
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struct ib_sa_query **sa_query)
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{
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@ -1588,7 +1677,7 @@ err1:
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EXPORT_SYMBOL(ib_sa_path_rec_get);
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static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
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int status,
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int status, int num_prs,
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struct ib_sa_mad *mad)
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{
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struct ib_sa_mcmember_query *query =
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@ -1680,7 +1769,7 @@ err1:
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/* Support GuidInfoRecord */
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static void ib_sa_guidinfo_rec_callback(struct ib_sa_query *sa_query,
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int status,
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int status, int num_paths,
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struct ib_sa_mad *mad)
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{
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struct ib_sa_guidinfo_query *query =
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@ -1790,7 +1879,7 @@ static void ib_classportinfo_cb(void *context)
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}
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static void ib_sa_classport_info_rec_callback(struct ib_sa_query *sa_query,
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int status,
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int status, int num_prs,
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struct ib_sa_mad *mad)
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{
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unsigned long flags;
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@ -1966,13 +2055,13 @@ static void send_handler(struct ib_mad_agent *agent,
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/* No callback -- already got recv */
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break;
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case IB_WC_RESP_TIMEOUT_ERR:
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query->callback(query, -ETIMEDOUT, NULL);
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query->callback(query, -ETIMEDOUT, 0, NULL);
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break;
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case IB_WC_WR_FLUSH_ERR:
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query->callback(query, -EINTR, NULL);
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query->callback(query, -EINTR, 0, NULL);
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break;
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default:
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query->callback(query, -EIO, NULL);
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query->callback(query, -EIO, 0, NULL);
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break;
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}
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@ -2000,10 +2089,10 @@ static void recv_handler(struct ib_mad_agent *mad_agent,
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if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
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query->callback(query,
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mad_recv_wc->recv_buf.mad->mad_hdr.status ?
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-EINVAL : 0,
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-EINVAL : 0, 1,
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(struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
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else
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query->callback(query, -EIO, NULL);
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query->callback(query, -EIO, 0, NULL);
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}
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ib_free_recv_mad(mad_recv_wc);
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@ -742,7 +742,7 @@ void ipoib_flush_paths(struct net_device *dev)
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static void path_rec_completion(int status,
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struct sa_path_rec *pathrec,
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void *path_ptr)
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int num_prs, void *path_ptr)
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{
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struct ipoib_path *path = path_ptr;
|
||||
struct net_device *dev = path->dev;
|
||||
|
||||
@ -699,7 +699,7 @@ static void srp_free_ch_ib(struct srp_target_port *target,
|
||||
|
||||
static void srp_path_rec_completion(int status,
|
||||
struct sa_path_rec *pathrec,
|
||||
void *ch_ptr)
|
||||
int num_paths, void *ch_ptr)
|
||||
{
|
||||
struct srp_rdma_ch *ch = ch_ptr;
|
||||
struct srp_target_port *target = ch->target;
|
||||
|
||||
@ -186,6 +186,7 @@ struct sa_path_rec {
|
||||
struct sa_path_rec_opa opa;
|
||||
};
|
||||
enum sa_path_rec_type rec_type;
|
||||
u32 flags;
|
||||
};
|
||||
|
||||
static inline enum ib_gid_type
|
||||
@ -413,7 +414,7 @@ int ib_sa_path_rec_get(struct ib_sa_client *client, struct ib_device *device,
|
||||
ib_sa_comp_mask comp_mask, unsigned long timeout_ms,
|
||||
gfp_t gfp_mask,
|
||||
void (*callback)(int status, struct sa_path_rec *resp,
|
||||
void *context),
|
||||
int num_prs, void *context),
|
||||
void *context, struct ib_sa_query **query);
|
||||
|
||||
struct ib_sa_multicast {
|
||||
|
||||
@ -49,9 +49,15 @@ struct rdma_addr {
|
||||
struct rdma_dev_addr dev_addr;
|
||||
};
|
||||
|
||||
#define RDMA_PRIMARY_PATH_MAX_REC_NUM 3
|
||||
struct rdma_route {
|
||||
struct rdma_addr addr;
|
||||
struct sa_path_rec *path_rec;
|
||||
|
||||
/* Optional path records of primary path */
|
||||
struct sa_path_rec *path_rec_inbound;
|
||||
struct sa_path_rec *path_rec_outbound;
|
||||
|
||||
/*
|
||||
* 0 - No primary nor alternate path is available
|
||||
* 1 - Only primary path is available
|
||||
|
||||
Loading…
Reference in New Issue
Block a user