[openib-general] [PATCH 7/7 v2] for 2.6.20 rdma/ucma: add userspace support for the rdma_cm
Sean Hefty
sean.hefty at intel.com
Tue Oct 24 15:58:12 PDT 2006
Export the rdma_cm capabilities to userspace.
Signed-off-by: Sean Hefty <sean.hefty at intel.com>
---
diff --git a/drivers/infiniband/core/Makefile b/drivers/infiniband/core/Makefile
index 8873b63..189e5d4 100644
--- a/drivers/infiniband/core/Makefile
+++ b/drivers/infiniband/core/Makefile
@@ -1,9 +1,11 @@
infiniband-$(CONFIG_INFINIBAND_ADDR_TRANS) := ib_addr.o rdma_cm.o
+user_access-$(CONFIG_INFINIBAND_ADDR_TRANS) := rdma_ucm.o
obj-$(CONFIG_INFINIBAND) += ib_core.o ib_mad.o ib_sa.o \
ib_cm.o iw_cm.o $(infiniband-y)
obj-$(CONFIG_INFINIBAND_USER_MAD) += ib_umad.o
-obj-$(CONFIG_INFINIBAND_USER_ACCESS) += ib_uverbs.o ib_ucm.o
+obj-$(CONFIG_INFINIBAND_USER_ACCESS) += ib_uverbs.o ib_ucm.o \
+ $(user_access-y)
ib_core-y := packer.o ud_header.o verbs.o sysfs.o \
device.o fmr_pool.o cache.o
@@ -18,6 +20,8 @@ iw_cm-y := iwcm.o
rdma_cm-y := cma.o
+rdma_ucm-y := ucma.o
+
ib_addr-y := addr.o
ib_umad-y := user_mad.o
diff --git a/drivers/infiniband/core/ucma.c b/drivers/infiniband/core/ucma.c
new file mode 100644
index 0000000..4dae930
--- /dev/null
+++ b/drivers/infiniband/core/ucma.c
@@ -0,0 +1,1067 @@
+/*
+ * Copyright (c) 2005-2006 Intel Corporation. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/completion.h>
+#include <linux/mutex.h>
+#include <linux/poll.h>
+#include <linux/idr.h>
+#include <linux/in.h>
+#include <linux/in6.h>
+#include <linux/miscdevice.h>
+
+#include <rdma/rdma_user_cm.h>
+#include <rdma/ib_marshall.h>
+#include <rdma/rdma_cm.h>
+
+MODULE_AUTHOR("Sean Hefty");
+MODULE_DESCRIPTION("RDMA Userspace Connection Manager Access");
+MODULE_LICENSE("Dual BSD/GPL");
+
+enum {
+ UCMA_MAX_BACKLOG = 128
+};
+
+struct ucma_file {
+ struct mutex mut;
+ struct file *filp;
+ struct list_head ctx_list;
+ struct list_head event_list;
+ wait_queue_head_t poll_wait;
+};
+
+struct ucma_context {
+ int id;
+ struct completion comp;
+ atomic_t ref;
+ int events_reported;
+ int backlog;
+
+ struct ucma_file *file;
+ struct rdma_cm_id *cm_id;
+ __u64 uid;
+
+ struct list_head list;
+ struct list_head mc_list;
+};
+
+struct ucma_multicast {
+ struct ucma_context *ctx;
+ int id;
+ int events_reported;
+
+ __u64 uid;
+ struct list_head list;
+ struct sockaddr addr;
+ u8 pad[sizeof(struct sockaddr_in6) -
+ sizeof(struct sockaddr)];
+};
+
+struct ucma_event {
+ struct ucma_context *ctx;
+ struct ucma_multicast *mc;
+ struct list_head list;
+ struct rdma_cm_id *cm_id;
+ struct rdma_ucm_event_resp resp;
+};
+
+static DEFINE_MUTEX(mut);
+static DEFINE_IDR(ctx_idr);
+static DEFINE_IDR(multicast_idr);
+
+static inline struct ucma_context* _ucma_find_context(int id,
+ struct ucma_file *file)
+{
+ struct ucma_context *ctx;
+
+ ctx = idr_find(&ctx_idr, id);
+ if (!ctx)
+ ctx = ERR_PTR(-ENOENT);
+ else if (ctx->file != file)
+ ctx = ERR_PTR(-EINVAL);
+ return ctx;
+}
+
+static struct ucma_context* ucma_get_ctx(struct ucma_file *file, int id)
+{
+ struct ucma_context *ctx;
+
+ mutex_lock(&mut);
+ ctx = _ucma_find_context(id, file);
+ if (!IS_ERR(ctx))
+ atomic_inc(&ctx->ref);
+ mutex_unlock(&mut);
+ return ctx;
+}
+
+static void ucma_put_ctx(struct ucma_context *ctx)
+{
+ if (atomic_dec_and_test(&ctx->ref))
+ complete(&ctx->comp);
+}
+
+static struct ucma_context* ucma_alloc_ctx(struct ucma_file *file)
+{
+ struct ucma_context *ctx;
+ int ret;
+
+ ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return NULL;
+
+ atomic_set(&ctx->ref, 1);
+ init_completion(&ctx->comp);
+ INIT_LIST_HEAD(&ctx->mc_list);
+ ctx->file = file;
+
+ do {
+ ret = idr_pre_get(&ctx_idr, GFP_KERNEL);
+ if (!ret)
+ goto error;
+
+ mutex_lock(&mut);
+ ret = idr_get_new(&ctx_idr, ctx, &ctx->id);
+ mutex_unlock(&mut);
+ } while (ret == -EAGAIN);
+
+ if (ret)
+ goto error;
+
+ list_add_tail(&ctx->list, &file->ctx_list);
+ return ctx;
+
+error:
+ kfree(ctx);
+ return NULL;
+}
+
+static struct ucma_multicast* ucma_alloc_multicast(struct ucma_context *ctx)
+{
+ struct ucma_multicast *mc;
+ int ret;
+
+ mc = kzalloc(sizeof(*mc), GFP_KERNEL);
+ if (!mc)
+ return NULL;
+
+ do {
+ ret = idr_pre_get(&multicast_idr, GFP_KERNEL);
+ if (!ret)
+ goto error;
+
+ mutex_lock(&mut);
+ ret = idr_get_new(&multicast_idr, mc, &mc->id);
+ mutex_unlock(&mut);
+ } while (ret == -EAGAIN);
+
+ if (ret)
+ goto error;
+
+ mc->ctx = ctx;
+ list_add_tail(&mc->list, &ctx->mc_list);
+ return mc;
+
+error:
+ kfree(mc);
+ return NULL;
+}
+
+static void ucma_copy_conn_event(struct rdma_ucm_conn_param *dst,
+ struct rdma_conn_param *src)
+{
+ if (src->private_data_len)
+ memcpy(dst->private_data, src->private_data,
+ src->private_data_len);
+ dst->private_data_len = src->private_data_len;
+ dst->responder_resources =src->responder_resources;
+ dst->initiator_depth = src->initiator_depth;
+ dst->flow_control = src->flow_control;
+ dst->retry_count = src->retry_count;
+ dst->rnr_retry_count = src->rnr_retry_count;
+ dst->srq = src->srq;
+ dst->qp_num = src->qp_num;
+}
+
+static void ucma_copy_ud_event(struct rdma_ucm_ud_param *dst,
+ struct rdma_ud_param *src)
+{
+ if (src->private_data_len)
+ memcpy(dst->private_data, src->private_data,
+ src->private_data_len);
+ dst->private_data_len = src->private_data_len;
+ ib_copy_ah_attr_to_user(&dst->ah_attr, &src->ah_attr);
+ dst->qp_num = src->qp_num;
+ dst->qkey = src->qkey;
+}
+
+static void ucma_set_event_context(struct ucma_context *ctx,
+ struct rdma_cm_event *event,
+ struct ucma_event *uevent)
+{
+ uevent->ctx = ctx;
+ switch (event->event) {
+ case RDMA_CM_EVENT_MULTICAST_JOIN:
+ case RDMA_CM_EVENT_MULTICAST_ERROR:
+ uevent->mc = (struct ucma_multicast *)
+ event->param.ud.private_data;
+ uevent->resp.uid = uevent->mc->uid;
+ uevent->resp.id = uevent->mc->id;
+ break;
+ default:
+ uevent->resp.uid = ctx->uid;
+ uevent->resp.id = ctx->id;
+ break;
+ }
+}
+
+static int ucma_event_handler(struct rdma_cm_id *cm_id,
+ struct rdma_cm_event *event)
+{
+ struct ucma_event *uevent;
+ struct ucma_context *ctx = cm_id->context;
+ int ret = 0;
+
+ uevent = kzalloc(sizeof(*uevent), GFP_KERNEL);
+ if (!uevent)
+ return event->event == RDMA_CM_EVENT_CONNECT_REQUEST;
+
+ uevent->cm_id = cm_id;
+ ucma_set_event_context(ctx, event, uevent);
+ uevent->resp.event = event->event;
+ uevent->resp.status = event->status;
+ if (cm_id->ps == RDMA_PS_UDP)
+ ucma_copy_ud_event(&uevent->resp.param.ud, &event->param.ud);
+ else
+ ucma_copy_conn_event(&uevent->resp.param.conn,
+ &event->param.conn);
+
+ mutex_lock(&ctx->file->mut);
+ if (event->event == RDMA_CM_EVENT_CONNECT_REQUEST) {
+ if (!ctx->backlog) {
+ ret = -EDQUOT;
+ goto out;
+ }
+ ctx->backlog--;
+ }
+ list_add_tail(&uevent->list, &ctx->file->event_list);
+ wake_up_interruptible(&ctx->file->poll_wait);
+out:
+ mutex_unlock(&ctx->file->mut);
+ return ret;
+}
+
+static ssize_t ucma_get_event(struct ucma_file *file, const char __user *inbuf,
+ int in_len, int out_len)
+{
+ struct ucma_context *ctx;
+ struct rdma_ucm_get_event cmd;
+ struct ucma_event *uevent;
+ int ret = 0;
+ DEFINE_WAIT(wait);
+
+ if (out_len < sizeof uevent->resp)
+ return -ENOSPC;
+
+ if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
+ return -EFAULT;
+
+ mutex_lock(&file->mut);
+ while (list_empty(&file->event_list)) {
+ if (file->filp->f_flags & O_NONBLOCK) {
+ ret = -EAGAIN;
+ break;
+ }
+
+ if (signal_pending(current)) {
+ ret = -ERESTARTSYS;
+ break;
+ }
+
+ prepare_to_wait(&file->poll_wait, &wait, TASK_INTERRUPTIBLE);
+ mutex_unlock(&file->mut);
+ schedule();
+ mutex_lock(&file->mut);
+ finish_wait(&file->poll_wait, &wait);
+ }
+
+ if (ret)
+ goto done;
+
+ uevent = list_entry(file->event_list.next, struct ucma_event, list);
+
+ if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) {
+ ctx = ucma_alloc_ctx(file);
+ if (!ctx) {
+ ret = -ENOMEM;
+ goto done;
+ }
+ uevent->ctx->backlog++;
+ ctx->cm_id = uevent->cm_id;
+ ctx->cm_id->context = ctx;
+ uevent->resp.id = ctx->id;
+ }
+
+ if (copy_to_user((void __user *)(unsigned long)cmd.response,
+ &uevent->resp, sizeof uevent->resp)) {
+ ret = -EFAULT;
+ goto done;
+ }
+
+ list_del(&uevent->list);
+ uevent->ctx->events_reported++;
+ if (uevent->mc)
+ uevent->mc->events_reported++;
+ kfree(uevent);
+done:
+ mutex_unlock(&file->mut);
+ return ret;
+}
+
+static ssize_t ucma_create_id(struct ucma_file *file,
+ const char __user *inbuf,
+ int in_len, int out_len)
+{
+ struct rdma_ucm_create_id cmd;
+ struct rdma_ucm_create_id_resp resp;
+ struct ucma_context *ctx;
+ int ret;
+
+ if (out_len < sizeof(resp))
+ return -ENOSPC;
+
+ if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
+ return -EFAULT;
+
+ mutex_lock(&file->mut);
+ ctx = ucma_alloc_ctx(file);
+ mutex_unlock(&file->mut);
+ if (!ctx)
+ return -ENOMEM;
+
+ ctx->uid = cmd.uid;
+ ctx->cm_id = rdma_create_id(ucma_event_handler, ctx, cmd.ps);
+ if (IS_ERR(ctx->cm_id)) {
+ ret = PTR_ERR(ctx->cm_id);
+ goto err1;
+ }
+
+ resp.id = ctx->id;
+ if (copy_to_user((void __user *)(unsigned long)cmd.response,
+ &resp, sizeof(resp))) {
+ ret = -EFAULT;
+ goto err2;
+ }
+ return 0;
+
+err2:
+ rdma_destroy_id(ctx->cm_id);
+err1:
+ mutex_lock(&mut);
+ idr_remove(&ctx_idr, ctx->id);
+ mutex_unlock(&mut);
+ kfree(ctx);
+ return ret;
+}
+
+static void ucma_cleanup_multicast(struct ucma_context *ctx)
+{
+ struct ucma_multicast *mc, *tmp;
+
+ mutex_lock(&mut);
+ list_for_each_entry_safe(mc, tmp, &ctx->mc_list, list) {
+ list_del(&mc->list);
+ idr_remove(&multicast_idr, mc->id);
+ kfree(mc);
+ }
+ mutex_unlock(&mut);
+}
+
+static void ucma_cleanup_events(struct ucma_context *ctx)
+{
+ struct ucma_event *uevent, *tmp;
+
+ list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) {
+ if (uevent->ctx != ctx)
+ continue;
+
+ list_del(&uevent->list);
+
+ /* clear incoming connections. */
+ if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST)
+ rdma_destroy_id(uevent->cm_id);
+
+ kfree(uevent);
+ }
+}
+
+static void ucma_cleanup_mc_events(struct ucma_multicast *mc)
+{
+ struct ucma_event *uevent, *tmp;
+
+ list_for_each_entry_safe(uevent, tmp, &mc->ctx->file->event_list, list) {
+ if (uevent->mc != mc)
+ continue;
+
+ list_del(&uevent->list);
+ kfree(uevent);
+ }
+}
+
+static int ucma_free_ctx(struct ucma_context *ctx)
+{
+ int events_reported;
+
+ /* No new events will be generated after destroying the id. */
+ rdma_destroy_id(ctx->cm_id);
+
+ ucma_cleanup_multicast(ctx);
+
+ /* Cleanup events not yet reported to the user. */
+ mutex_lock(&ctx->file->mut);
+ ucma_cleanup_events(ctx);
+ list_del(&ctx->list);
+ mutex_unlock(&ctx->file->mut);
+
+ events_reported = ctx->events_reported;
+ kfree(ctx);
+ return events_reported;
+}
+
+static ssize_t ucma_destroy_id(struct ucma_file *file, const char __user *inbuf,
+ int in_len, int out_len)
+{
+ struct rdma_ucm_destroy_id cmd;
+ struct rdma_ucm_destroy_id_resp resp;
+ struct ucma_context *ctx;
+ int ret = 0;
+
+ if (out_len < sizeof(resp))
+ return -ENOSPC;
+
+ if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
+ return -EFAULT;
+
+ mutex_lock(&mut);
+ ctx = _ucma_find_context(cmd.id, file);
+ if (!IS_ERR(ctx))
+ idr_remove(&ctx_idr, ctx->id);
+ mutex_unlock(&mut);
+
+ if (IS_ERR(ctx))
+ return PTR_ERR(ctx);
+
+ ucma_put_ctx(ctx);
+ wait_for_completion(&ctx->comp);
+ resp.events_reported = ucma_free_ctx(ctx);
+
+ if (copy_to_user((void __user *)(unsigned long)cmd.response,
+ &resp, sizeof(resp)))
+ ret = -EFAULT;
+
+ return ret;
+}
+
+static ssize_t ucma_bind_addr(struct ucma_file *file, const char __user *inbuf,
+ int in_len, int out_len)
+{
+ struct rdma_ucm_bind_addr cmd;
+ struct ucma_context *ctx;
+ int ret;
+
+ if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
+ return -EFAULT;
+
+ ctx = ucma_get_ctx(file, cmd.id);
+ if (IS_ERR(ctx))
+ return PTR_ERR(ctx);
+
+ ret = rdma_bind_addr(ctx->cm_id, (struct sockaddr *) &cmd.addr);
+ ucma_put_ctx(ctx);
+ return ret;
+}
+
+static ssize_t ucma_resolve_addr(struct ucma_file *file,
+ const char __user *inbuf,
+ int in_len, int out_len)
+{
+ struct rdma_ucm_resolve_addr cmd;
+ struct ucma_context *ctx;
+ int ret;
+
+ if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
+ return -EFAULT;
+
+ ctx = ucma_get_ctx(file, cmd.id);
+ if (IS_ERR(ctx))
+ return PTR_ERR(ctx);
+
+ ret = rdma_resolve_addr(ctx->cm_id, (struct sockaddr *) &cmd.src_addr,
+ (struct sockaddr *) &cmd.dst_addr,
+ cmd.timeout_ms);
+ ucma_put_ctx(ctx);
+ return ret;
+}
+
+static ssize_t ucma_resolve_route(struct ucma_file *file,
+ const char __user *inbuf,
+ int in_len, int out_len)
+{
+ struct rdma_ucm_resolve_route cmd;
+ struct ucma_context *ctx;
+ int ret;
+
+ if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
+ return -EFAULT;
+
+ ctx = ucma_get_ctx(file, cmd.id);
+ if (IS_ERR(ctx))
+ return PTR_ERR(ctx);
+
+ ret = rdma_resolve_route(ctx->cm_id, cmd.timeout_ms);
+ ucma_put_ctx(ctx);
+ return ret;
+}
+
+static void ucma_copy_ib_route(struct rdma_ucm_query_route_resp *resp,
+ struct rdma_route *route)
+{
+ struct rdma_dev_addr *dev_addr;
+
+ resp->num_paths = route->num_paths;
+ switch (route->num_paths) {
+ case 0:
+ dev_addr = &route->addr.dev_addr;
+ ib_addr_get_dgid(dev_addr,
+ (union ib_gid *) &resp->ib_route[0].dgid);
+ ib_addr_get_sgid(dev_addr,
+ (union ib_gid *) &resp->ib_route[0].sgid);
+ resp->ib_route[0].pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
+ break;
+ case 2:
+ ib_copy_path_rec_to_user(&resp->ib_route[1],
+ &route->path_rec[1]);
+ /* fall through */
+ case 1:
+ ib_copy_path_rec_to_user(&resp->ib_route[0],
+ &route->path_rec[0]);
+ break;
+ default:
+ break;
+ }
+}
+
+static ssize_t ucma_query_route(struct ucma_file *file,
+ const char __user *inbuf,
+ int in_len, int out_len)
+{
+ struct rdma_ucm_query_route cmd;
+ struct rdma_ucm_query_route_resp resp;
+ struct ucma_context *ctx;
+ struct sockaddr *addr;
+ int ret = 0;
+
+ if (out_len < sizeof(resp))
+ return -ENOSPC;
+
+ if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
+ return -EFAULT;
+
+ ctx = ucma_get_ctx(file, cmd.id);
+ if (IS_ERR(ctx))
+ return PTR_ERR(ctx);
+
+ memset(&resp, 0, sizeof resp);
+ addr = &ctx->cm_id->route.addr.src_addr;
+ memcpy(&resp.src_addr, addr, addr->sa_family == AF_INET ?
+ sizeof(struct sockaddr_in) :
+ sizeof(struct sockaddr_in6));
+ addr = &ctx->cm_id->route.addr.dst_addr;
+ memcpy(&resp.dst_addr, addr, addr->sa_family == AF_INET ?
+ sizeof(struct sockaddr_in) :
+ sizeof(struct sockaddr_in6));
+ if (!ctx->cm_id->device)
+ goto out;
+
+ resp.node_guid = ctx->cm_id->device->node_guid;
+ resp.port_num = ctx->cm_id->port_num;
+ switch (rdma_node_get_transport(ctx->cm_id->device->node_type)) {
+ case RDMA_TRANSPORT_IB:
+ ucma_copy_ib_route(&resp, &ctx->cm_id->route);
+ break;
+ default:
+ break;
+ }
+
+out:
+ if (copy_to_user((void __user *)(unsigned long)cmd.response,
+ &resp, sizeof(resp)))
+ ret = -EFAULT;
+
+ ucma_put_ctx(ctx);
+ return ret;
+}
+
+static void ucma_copy_conn_param(struct rdma_conn_param *dst,
+ struct rdma_ucm_conn_param *src)
+{
+ dst->private_data = src->private_data;
+ dst->private_data_len = src->private_data_len;
+ dst->responder_resources =src->responder_resources;
+ dst->initiator_depth = src->initiator_depth;
+ dst->flow_control = src->flow_control;
+ dst->retry_count = src->retry_count;
+ dst->rnr_retry_count = src->rnr_retry_count;
+ dst->srq = src->srq;
+ dst->qp_num = src->qp_num;
+}
+
+static ssize_t ucma_connect(struct ucma_file *file, const char __user *inbuf,
+ int in_len, int out_len)
+{
+ struct rdma_ucm_connect cmd;
+ struct rdma_conn_param conn_param;
+ struct ucma_context *ctx;
+ int ret;
+
+ if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
+ return -EFAULT;
+
+ if (!cmd.conn_param.valid)
+ return -EINVAL;
+
+ ctx = ucma_get_ctx(file, cmd.id);
+ if (IS_ERR(ctx))
+ return PTR_ERR(ctx);
+
+ ucma_copy_conn_param(&conn_param, &cmd.conn_param);
+ ret = rdma_connect(ctx->cm_id, &conn_param);
+ ucma_put_ctx(ctx);
+ return ret;
+}
+
+static ssize_t ucma_listen(struct ucma_file *file, const char __user *inbuf,
+ int in_len, int out_len)
+{
+ struct rdma_ucm_listen cmd;
+ struct ucma_context *ctx;
+ int ret;
+
+ if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
+ return -EFAULT;
+
+ ctx = ucma_get_ctx(file, cmd.id);
+ if (IS_ERR(ctx))
+ return PTR_ERR(ctx);
+
+ ctx->backlog = cmd.backlog > 0 && cmd.backlog < UCMA_MAX_BACKLOG ?
+ cmd.backlog : UCMA_MAX_BACKLOG;
+ ret = rdma_listen(ctx->cm_id, ctx->backlog);
+ ucma_put_ctx(ctx);
+ return ret;
+}
+
+static ssize_t ucma_accept(struct ucma_file *file, const char __user *inbuf,
+ int in_len, int out_len)
+{
+ struct rdma_ucm_accept cmd;
+ struct rdma_conn_param conn_param;
+ struct ucma_context *ctx;
+ int ret;
+
+ if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
+ return -EFAULT;
+
+ ctx = ucma_get_ctx(file, cmd.id);
+ if (IS_ERR(ctx))
+ return PTR_ERR(ctx);
+
+ if (cmd.conn_param.valid) {
+ ctx->uid = cmd.uid;
+ ucma_copy_conn_param(&conn_param, &cmd.conn_param);
+ ret = rdma_accept(ctx->cm_id, &conn_param);
+ } else
+ ret = rdma_accept(ctx->cm_id, NULL);
+
+ ucma_put_ctx(ctx);
+ return ret;
+}
+
+static ssize_t ucma_reject(struct ucma_file *file, const char __user *inbuf,
+ int in_len, int out_len)
+{
+ struct rdma_ucm_reject cmd;
+ struct ucma_context *ctx;
+ int ret;
+
+ if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
+ return -EFAULT;
+
+ ctx = ucma_get_ctx(file, cmd.id);
+ if (IS_ERR(ctx))
+ return PTR_ERR(ctx);
+
+ ret = rdma_reject(ctx->cm_id, cmd.private_data, cmd.private_data_len);
+ ucma_put_ctx(ctx);
+ return ret;
+}
+
+static ssize_t ucma_disconnect(struct ucma_file *file, const char __user *inbuf,
+ int in_len, int out_len)
+{
+ struct rdma_ucm_disconnect cmd;
+ struct ucma_context *ctx;
+ int ret;
+
+ if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
+ return -EFAULT;
+
+ ctx = ucma_get_ctx(file, cmd.id);
+ if (IS_ERR(ctx))
+ return PTR_ERR(ctx);
+
+ ret = rdma_disconnect(ctx->cm_id);
+ ucma_put_ctx(ctx);
+ return ret;
+}
+
+static ssize_t ucma_init_qp_attr(struct ucma_file *file,
+ const char __user *inbuf,
+ int in_len, int out_len)
+{
+ struct rdma_ucm_init_qp_attr cmd;
+ struct ib_uverbs_qp_attr resp;
+ struct ucma_context *ctx;
+ struct ib_qp_attr qp_attr;
+ int ret;
+
+ if (out_len < sizeof(resp))
+ return -ENOSPC;
+
+ if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
+ return -EFAULT;
+
+ ctx = ucma_get_ctx(file, cmd.id);
+ if (IS_ERR(ctx))
+ return PTR_ERR(ctx);
+
+ resp.qp_attr_mask = 0;
+ memset(&qp_attr, 0, sizeof qp_attr);
+ qp_attr.qp_state = cmd.qp_state;
+ ret = rdma_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask);
+ if (ret)
+ goto out;
+
+ ib_copy_qp_attr_to_user(&resp, &qp_attr);
+ if (copy_to_user((void __user *)(unsigned long)cmd.response,
+ &resp, sizeof(resp)))
+ ret = -EFAULT;
+
+out:
+ ucma_put_ctx(ctx);
+ return ret;
+}
+
+static ssize_t ucma_establish(struct ucma_file *file, const char __user *inbuf,
+ int in_len, int out_len)
+{
+ struct rdma_ucm_establish cmd;
+ struct ucma_context *ctx;
+ int ret;
+
+ if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
+ return -EFAULT;
+
+ ctx = ucma_get_ctx(file, cmd.id);
+ if (IS_ERR(ctx))
+ return PTR_ERR(ctx);
+
+ ret = rdma_establish(ctx->cm_id);
+ ucma_put_ctx(ctx);
+ return ret;
+}
+
+static ssize_t ucma_join_multicast(struct ucma_file *file,
+ const char __user *inbuf,
+ int in_len, int out_len)
+{
+ struct rdma_ucm_join_mcast cmd;
+ struct rdma_ucm_create_id_resp resp;
+ struct ucma_context *ctx;
+ struct ucma_multicast *mc;
+ int ret;
+
+ if (out_len < sizeof(resp))
+ return -ENOSPC;
+
+ if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
+ return -EFAULT;
+
+ ctx = ucma_get_ctx(file, cmd.id);
+ if (IS_ERR(ctx))
+ return PTR_ERR(ctx);
+
+ mutex_lock(&file->mut);
+ mc = ucma_alloc_multicast(ctx);
+ if (IS_ERR(mc)) {
+ ret = PTR_ERR(mc);
+ goto err1;
+ }
+
+ mc->uid = cmd.uid;
+ memcpy(&mc->addr, &cmd.addr, sizeof cmd.addr);
+ ret = rdma_join_multicast(ctx->cm_id, &mc->addr, mc);
+ if (ret)
+ goto err2;
+
+ resp.id = mc->id;
+ if (copy_to_user((void __user *)(unsigned long)cmd.response,
+ &resp, sizeof(resp))) {
+ ret = -EFAULT;
+ goto err3;
+ }
+
+ mutex_unlock(&file->mut);
+ ucma_put_ctx(ctx);
+ return 0;
+
+err3:
+ rdma_leave_multicast(ctx->cm_id, &mc->addr);
+ ucma_cleanup_mc_events(mc);
+err2:
+ mutex_lock(&mut);
+ idr_remove(&multicast_idr, mc->id);
+ mutex_unlock(&mut);
+ list_del(&mc->list);
+ kfree(mc);
+err1:
+ mutex_unlock(&file->mut);
+ ucma_put_ctx(ctx);
+ return ret;
+}
+
+static ssize_t ucma_leave_multicast(struct ucma_file *file,
+ const char __user *inbuf,
+ int in_len, int out_len)
+{
+ struct rdma_ucm_destroy_id cmd;
+ struct rdma_ucm_destroy_id_resp resp;
+ struct ucma_multicast *mc;
+ int ret = 0;
+
+ if (out_len < sizeof(resp))
+ return -ENOSPC;
+
+ if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
+ return -EFAULT;
+
+ mutex_lock(&mut);
+ mc = idr_find(&multicast_idr, cmd.id);
+ if (!mc)
+ mc = ERR_PTR(-ENOENT);
+ else if (mc->ctx->file != file)
+ mc = ERR_PTR(-EINVAL);
+ else {
+ idr_remove(&multicast_idr, mc->id);
+ atomic_inc(&mc->ctx->ref);
+ }
+ mutex_unlock(&mut);
+
+ if (IS_ERR(mc)) {
+ ret = PTR_ERR(mc);
+ goto out;
+ }
+
+ rdma_leave_multicast(mc->ctx->cm_id, &mc->addr);
+ mutex_lock(&mc->ctx->file->mut);
+ ucma_cleanup_mc_events(mc);
+ list_del(&mc->list);
+ mutex_unlock(&mc->ctx->file->mut);
+
+ ucma_put_ctx(mc->ctx);
+ kfree(mc);
+out:
+ return ret;
+}
+
+static ssize_t (*ucma_cmd_table[])(struct ucma_file *file,
+ const char __user *inbuf,
+ int in_len, int out_len) = {
+ [RDMA_USER_CM_CMD_CREATE_ID] = ucma_create_id,
+ [RDMA_USER_CM_CMD_DESTROY_ID] = ucma_destroy_id,
+ [RDMA_USER_CM_CMD_BIND_ADDR] = ucma_bind_addr,
+ [RDMA_USER_CM_CMD_RESOLVE_ADDR] = ucma_resolve_addr,
+ [RDMA_USER_CM_CMD_RESOLVE_ROUTE]= ucma_resolve_route,
+ [RDMA_USER_CM_CMD_QUERY_ROUTE] = ucma_query_route,
+ [RDMA_USER_CM_CMD_CONNECT] = ucma_connect,
+ [RDMA_USER_CM_CMD_LISTEN] = ucma_listen,
+ [RDMA_USER_CM_CMD_ACCEPT] = ucma_accept,
+ [RDMA_USER_CM_CMD_REJECT] = ucma_reject,
+ [RDMA_USER_CM_CMD_DISCONNECT] = ucma_disconnect,
+ [RDMA_USER_CM_CMD_INIT_QP_ATTR] = ucma_init_qp_attr,
+ [RDMA_USER_CM_CMD_GET_EVENT] = ucma_get_event,
+ [RDMA_USER_CM_CMD_GET_OPTION] = NULL,
+ [RDMA_USER_CM_CMD_SET_OPTION] = NULL,
+ [RDMA_USER_CM_CMD_ESTABLISH] = ucma_establish,
+ [RDMA_USER_CM_CMD_JOIN_MCAST] = ucma_join_multicast,
+ [RDMA_USER_CM_CMD_LEAVE_MCAST] = ucma_leave_multicast,
+};
+
+static ssize_t ucma_write(struct file *filp, const char __user *buf,
+ size_t len, loff_t *pos)
+{
+ struct ucma_file *file = filp->private_data;
+ struct rdma_ucm_cmd_hdr hdr;
+ ssize_t ret;
+
+ if (len < sizeof(hdr))
+ return -EINVAL;
+
+ if (copy_from_user(&hdr, buf, sizeof(hdr)))
+ return -EFAULT;
+
+ if (hdr.cmd < 0 || hdr.cmd >= ARRAY_SIZE(ucma_cmd_table))
+ return -EINVAL;
+
+ if (hdr.in + sizeof(hdr) > len)
+ return -EINVAL;
+
+ if (!ucma_cmd_table[hdr.cmd])
+ return -ENOSYS;
+
+ ret = ucma_cmd_table[hdr.cmd](file, buf + sizeof(hdr), hdr.in, hdr.out);
+ if (!ret)
+ ret = len;
+
+ return ret;
+}
+
+static unsigned int ucma_poll(struct file *filp, struct poll_table_struct *wait)
+{
+ struct ucma_file *file = filp->private_data;
+ unsigned int mask = 0;
+
+ poll_wait(filp, &file->poll_wait, wait);
+
+ if (!list_empty(&file->event_list))
+ mask = POLLIN | POLLRDNORM;
+
+ return mask;
+}
+
+static int ucma_open(struct inode *inode, struct file *filp)
+{
+ struct ucma_file *file;
+
+ file = kmalloc(sizeof *file, GFP_KERNEL);
+ if (!file)
+ return -ENOMEM;
+
+ INIT_LIST_HEAD(&file->event_list);
+ INIT_LIST_HEAD(&file->ctx_list);
+ init_waitqueue_head(&file->poll_wait);
+ mutex_init(&file->mut);
+
+ filp->private_data = file;
+ file->filp = filp;
+ return 0;
+}
+
+static int ucma_close(struct inode *inode, struct file *filp)
+{
+ struct ucma_file *file = filp->private_data;
+ struct ucma_context *ctx, *tmp;
+
+ mutex_lock(&file->mut);
+ list_for_each_entry_safe(ctx, tmp, &file->ctx_list, list) {
+ mutex_unlock(&file->mut);
+
+ mutex_lock(&mut);
+ idr_remove(&ctx_idr, ctx->id);
+ mutex_unlock(&mut);
+
+ ucma_free_ctx(ctx);
+ mutex_lock(&file->mut);
+ }
+ mutex_unlock(&file->mut);
+ kfree(file);
+ return 0;
+}
+
+static struct file_operations ucma_fops = {
+ .owner = THIS_MODULE,
+ .open = ucma_open,
+ .release = ucma_close,
+ .write = ucma_write,
+ .poll = ucma_poll,
+};
+
+static struct miscdevice ucma_misc = {
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = "rdma_cm",
+ .fops = &ucma_fops,
+};
+
+static ssize_t show_abi_version(struct class_device *class_dev, char *buf)
+{
+ return sprintf(buf, "%d\n", RDMA_USER_CM_ABI_VERSION);
+}
+static CLASS_DEVICE_ATTR(abi_version, S_IRUGO, show_abi_version, NULL);
+
+static int __init ucma_init(void)
+{
+ int ret;
+
+ ret = misc_register(&ucma_misc);
+ if (ret)
+ return ret;
+
+ ret = class_device_create_file(ucma_misc.class,
+ &class_device_attr_abi_version);
+ if (ret) {
+ printk(KERN_ERR "rdma_ucm: couldn't create abi_version attr\n");
+ goto err;
+ }
+ return 0;
+err:
+ misc_deregister(&ucma_misc);
+ return ret;
+}
+
+static void __exit ucma_cleanup(void)
+{
+ class_device_remove_file(ucma_misc.class,
+ &class_device_attr_abi_version);
+ misc_deregister(&ucma_misc);
+ idr_destroy(&ctx_idr);
+}
+
+module_init(ucma_init);
+module_exit(ucma_cleanup);
diff --git a/drivers/infiniband/core/uverbs_marshall.c b/drivers/infiniband/core/uverbs_marshall.c
index ce46b13..5440da0 100644
--- a/drivers/infiniband/core/uverbs_marshall.c
+++ b/drivers/infiniband/core/uverbs_marshall.c
@@ -32,8 +32,8 @@
#include <rdma/ib_marshall.h>
-static void ib_copy_ah_attr_to_user(struct ib_uverbs_ah_attr *dst,
- struct ib_ah_attr *src)
+void ib_copy_ah_attr_to_user(struct ib_uverbs_ah_attr *dst,
+ struct ib_ah_attr *src)
{
memcpy(dst->grh.dgid, src->grh.dgid.raw, sizeof src->grh.dgid);
dst->grh.flow_label = src->grh.flow_label;
@@ -47,6 +47,7 @@ static void ib_copy_ah_attr_to_user(stru
dst->is_global = src->ah_flags & IB_AH_GRH ? 1 : 0;
dst->port_num = src->port_num;
}
+EXPORT_SYMBOL(ib_copy_ah_attr_to_user);
void ib_copy_qp_attr_to_user(struct ib_uverbs_qp_attr *dst,
struct ib_qp_attr *src)
diff --git a/include/rdma/ib_marshall.h b/include/rdma/ib_marshall.h
index 66bf4d7..db03720 100644
--- a/include/rdma/ib_marshall.h
+++ b/include/rdma/ib_marshall.h
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2005 Intel Corporation. All rights reserved.
+ * Copyright (c) 2005-2006 Intel Corporation. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
@@ -41,6 +41,9 @@ #include <rdma/ib_user_sa.h>
void ib_copy_qp_attr_to_user(struct ib_uverbs_qp_attr *dst,
struct ib_qp_attr *src);
+void ib_copy_ah_attr_to_user(struct ib_uverbs_ah_attr *dst,
+ struct ib_ah_attr *src);
+
void ib_copy_path_rec_to_user(struct ib_user_path_rec *dst,
struct ib_sa_path_rec *src);
diff --git a/include/rdma/rdma_user_cm.h b/include/rdma/rdma_user_cm.h
new file mode 100644
index 0000000..5e76fb2
--- /dev/null
+++ b/include/rdma/rdma_user_cm.h
@@ -0,0 +1,214 @@
+/*
+ * Copyright (c) 2005-2006 Intel Corporation. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef RDMA_USER_CM_H
+#define RDMA_USER_CM_H
+
+#include <linux/types.h>
+#include <linux/in6.h>
+#include <rdma/ib_user_verbs.h>
+#include <rdma/ib_user_sa.h>
+
+#define RDMA_USER_CM_ABI_VERSION 3
+
+#define RDMA_MAX_PRIVATE_DATA 256
+
+enum {
+ RDMA_USER_CM_CMD_CREATE_ID,
+ RDMA_USER_CM_CMD_DESTROY_ID,
+ RDMA_USER_CM_CMD_BIND_ADDR,
+ RDMA_USER_CM_CMD_RESOLVE_ADDR,
+ RDMA_USER_CM_CMD_RESOLVE_ROUTE,
+ RDMA_USER_CM_CMD_QUERY_ROUTE,
+ RDMA_USER_CM_CMD_CONNECT,
+ RDMA_USER_CM_CMD_LISTEN,
+ RDMA_USER_CM_CMD_ACCEPT,
+ RDMA_USER_CM_CMD_REJECT,
+ RDMA_USER_CM_CMD_DISCONNECT,
+ RDMA_USER_CM_CMD_INIT_QP_ATTR,
+ RDMA_USER_CM_CMD_GET_EVENT,
+ RDMA_USER_CM_CMD_GET_OPTION,
+ RDMA_USER_CM_CMD_SET_OPTION,
+ RDMA_USER_CM_CMD_ESTABLISH,
+ RDMA_USER_CM_CMD_JOIN_MCAST,
+ RDMA_USER_CM_CMD_LEAVE_MCAST
+};
+
+/*
+ * command ABI structures.
+ */
+struct rdma_ucm_cmd_hdr {
+ __u32 cmd;
+ __u16 in;
+ __u16 out;
+};
+
+struct rdma_ucm_create_id {
+ __u64 uid;
+ __u64 response;
+ __u16 ps;
+ __u8 reserved[6];
+};
+
+struct rdma_ucm_create_id_resp {
+ __u32 id;
+};
+
+struct rdma_ucm_destroy_id {
+ __u64 response;
+ __u32 id;
+ __u32 reserved;
+};
+
+struct rdma_ucm_destroy_id_resp {
+ __u32 events_reported;
+};
+
+struct rdma_ucm_bind_addr {
+ __u64 response;
+ struct sockaddr_in6 addr;
+ __u32 id;
+};
+
+struct rdma_ucm_resolve_addr {
+ struct sockaddr_in6 src_addr;
+ struct sockaddr_in6 dst_addr;
+ __u32 id;
+ __u32 timeout_ms;
+};
+
+struct rdma_ucm_resolve_route {
+ __u32 id;
+ __u32 timeout_ms;
+};
+
+struct rdma_ucm_query_route {
+ __u64 response;
+ __u32 id;
+ __u32 reserved;
+};
+
+struct rdma_ucm_query_route_resp {
+ __u64 node_guid;
+ struct ib_user_path_rec ib_route[2];
+ struct sockaddr_in6 src_addr;
+ struct sockaddr_in6 dst_addr;
+ __u32 num_paths;
+ __u8 port_num;
+ __u8 reserved[3];
+};
+
+struct rdma_ucm_conn_param {
+ __u32 qp_num;
+ __u32 reserved;
+ __u8 private_data[RDMA_MAX_PRIVATE_DATA];
+ __u8 private_data_len;
+ __u8 srq;
+ __u8 responder_resources;
+ __u8 initiator_depth;
+ __u8 flow_control;
+ __u8 retry_count;
+ __u8 rnr_retry_count;
+ __u8 valid;
+};
+
+struct rdma_ucm_ud_param {
+ __u32 qp_num;
+ __u32 qkey;
+ struct ib_uverbs_ah_attr ah_attr;
+ __u8 private_data[RDMA_MAX_PRIVATE_DATA];
+ __u8 private_data_len;
+ __u8 reserved[7];
+};
+
+struct rdma_ucm_connect {
+ struct rdma_ucm_conn_param conn_param;
+ __u32 id;
+ __u32 reserved;
+};
+
+struct rdma_ucm_listen {
+ __u32 id;
+ __u32 backlog;
+};
+
+struct rdma_ucm_accept {
+ __u64 uid;
+ struct rdma_ucm_conn_param conn_param;
+ __u32 id;
+ __u32 reserved;
+};
+
+struct rdma_ucm_reject {
+ __u32 id;
+ __u8 private_data_len;
+ __u8 reserved[3];
+ __u8 private_data[RDMA_MAX_PRIVATE_DATA];
+};
+
+struct rdma_ucm_disconnect {
+ __u32 id;
+};
+
+struct rdma_ucm_init_qp_attr {
+ __u64 response;
+ __u32 id;
+ __u32 qp_state;
+};
+
+struct rdma_ucm_establish {
+ __u32 id;
+};
+
+struct rdma_ucm_join_mcast {
+ __u64 response; /* rdma_ucm_create_id_resp */
+ __u64 uid;
+ struct sockaddr_in6 addr;
+ __u32 id;
+};
+
+struct rdma_ucm_get_event {
+ __u64 response;
+};
+
+struct rdma_ucm_event_resp {
+ __u64 uid;
+ __u32 id;
+ __u32 event;
+ __u32 status;
+ union {
+ struct rdma_ucm_conn_param conn;
+ struct rdma_ucm_ud_param ud;
+ } param;
+};
+
+#endif /* RDMA_USER_CM_H */
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