Release 4.7 drivers/infiniband/core/ucma.c

Directory: drivers/infiniband/core
/*
 * 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/file.h>
#include <linux/mutex.h>
#include <linux/poll.h>
#include <linux/sched.h>
#include <linux/idr.h>
#include <linux/in.h>
#include <linux/in6.h>
#include <linux/miscdevice.h>
#include <linux/slab.h>
#include <linux/sysctl.h>
#include <linux/module.h>
#include <linux/nsproxy.h>

#include <rdma/rdma_user_cm.h>
#include <rdma/ib_marshall.h>
#include <rdma/rdma_cm.h>
#include <rdma/rdma_cm_ib.h>
#include <rdma/ib_addr.h>
#include <rdma/ib.h>

MODULE_AUTHOR("Sean Hefty");
MODULE_DESCRIPTION("RDMA Userspace Connection Manager Access");
MODULE_LICENSE("Dual BSD/GPL");


static unsigned int max_backlog = 1024;


static struct ctl_table_header *ucma_ctl_table_hdr;

static struct ctl_table ucma_ctl_table[] = {
	{
		.procname	= "max_backlog",
		.data		= &max_backlog,
		.maxlen		= sizeof max_backlog,
		.mode		= 0644,
		.proc_handler	= proc_dointvec,
        },
	{ }
};


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 workqueue_struct	*close_wq;
};


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;
	/* mark that device is in process of destroying the internal HW
         * resources, protected by the global mut
         */
	
int			closing;
	/* sync between removal event and id destroy, protected by file mut */
	
int			destroying;
	
struct work_struct	close_work;
};


struct ucma_multicast {
	
struct ucma_context	*ctx;
	
int			id;
	
int			events_reported;

	
u64			uid;
	
struct list_head	list;
	
struct sockaddr_storage	addr;
};


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;
	
struct work_struct	close_work;
};

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;
}

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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)) {
		if (ctx->closing)
			ctx = ERR_PTR(-EIO);
		else
			atomic_inc(&ctx->ref);
	}
	mutex_unlock(&mut);
	return ctx;
}

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static void ucma_put_ctx(struct ucma_context *ctx)
{
	if (atomic_dec_and_test(&ctx->ref))
		complete(&ctx->comp);
}

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static void ucma_close_event_id(struct work_struct *work)
{
	struct ucma_event *uevent_close =  container_of(work, struct ucma_event, close_work);

	rdma_destroy_id(uevent_close->cm_id);
	kfree(uevent_close);
}

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static void ucma_close_id(struct work_struct *work)
{
	struct ucma_context *ctx =  container_of(work, struct ucma_context, close_work);

	/* once all inflight tasks are finished, we close all underlying
         * resources. The context is still alive till its explicit destryoing
         * by its creator.
         */
	ucma_put_ctx(ctx);
	wait_for_completion(&ctx->comp);
	/* No new events will be generated after destroying the id. */
	rdma_destroy_id(ctx->cm_id);
}

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static struct ucma_context *ucma_alloc_ctx(struct ucma_file *file)
{
	struct ucma_context *ctx;

	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
	if (!ctx)
		return NULL;

	INIT_WORK(&ctx->close_work, ucma_close_id);
	atomic_set(&ctx->ref, 1);
	init_completion(&ctx->comp);
	INIT_LIST_HEAD(&ctx->mc_list);
	ctx->file = file;

	mutex_lock(&mut);
	ctx->id = idr_alloc(&ctx_idr, ctx, 0, 0, GFP_KERNEL);
	mutex_unlock(&mut);
	if (ctx->id < 0)
		goto error;

	list_add_tail(&ctx->list, &file->ctx_list);
	return ctx;

error:
	kfree(ctx);
	return NULL;
}

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Total 148 100.00% 4 100.00%



static struct ucma_multicast* ucma_alloc_multicast(struct ucma_context *ctx)
{
	struct ucma_multicast *mc;

	mc = kzalloc(sizeof(*mc), GFP_KERNEL);
	if (!mc)
		return NULL;

	mutex_lock(&mut);
	mc->id = idr_alloc(&multicast_idr, mc, 0, 0, GFP_KERNEL);
	mutex_unlock(&mut);
	if (mc->id < 0)
		goto error;

	mc->ctx = ctx;
	list_add_tail(&mc->list, &ctx->mc_list);
	return mc;

error:
	kfree(mc);
	return NULL;
}

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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;
}

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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;
}

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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;
	}
}

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/* Called with file->mut locked for the relevant context. */


static void ucma_removal_event_handler(struct rdma_cm_id *cm_id)
{
	struct ucma_context *ctx = cm_id->context;
	struct ucma_event *con_req_eve;
	int event_found = 0;

	if (ctx->destroying)
		return;

	/* only if context is pointing to cm_id that it owns it and can be
         * queued to be closed, otherwise that cm_id is an inflight one that
         * is part of that context event list pending to be detached and
         * reattached to its new context as part of ucma_get_event,
         * handled separately below.
         */
	if (ctx->cm_id == cm_id) {
		mutex_lock(&mut);
		ctx->closing = 1;
		mutex_unlock(&mut);
		queue_work(ctx->file->close_wq, &ctx->close_work);
		return;
	}

	list_for_each_entry(con_req_eve, &ctx->file->event_list, list) {
		if (con_req_eve->cm_id == cm_id &&
		    con_req_eve->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) {
			list_del(&con_req_eve->list);
			INIT_WORK(&con_req_eve->close_work, ucma_close_event_id);
			queue_work(ctx->file->close_wq, &con_req_eve->close_work);
			event_found = 1;
			break;
		}
	}
	if (!event_found)
		pr_err("ucma_removal_event_handler: warning: connect request event wasn't found\n");
}

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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;

	mutex_lock(&ctx->file->mut);
	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->qp_type == IB_QPT_UD)
		ucma_copy_ud_event(&uevent->resp.param.ud, &event->param.ud);
	else
		ucma_copy_conn_event(&uevent->resp.param.conn,
				     &event->param.conn);

	if (event->event == RDMA_CM_EVENT_CONNECT_REQUEST) {
		if (!ctx->backlog) {
			ret = -ENOMEM;
			kfree(uevent);
			goto out;
		}
		ctx->backlog--;
	} else if (!ctx->uid || ctx->cm_id != cm_id) {
		/*
                 * We ignore events for new connections until userspace has set
                 * their context.  This can only happen if an error occurs on a
                 * new connection before the user accepts it.  This is okay,
                 * since the accept will just fail later. However, we do need
                 * to release the underlying HW resources in case of a device
                 * removal event.
                 */
		if (event->event == RDMA_CM_EVENT_DEVICE_REMOVAL)
			ucma_removal_event_handler(cm_id);

		kfree(uevent);
		goto out;
	}

	list_add_tail(&uevent->list, &ctx->file->event_list);
	wake_up_interruptible(&ctx->file->poll_wait);
	if (event->event == RDMA_CM_EVENT_DEVICE_REMOVAL)
		ucma_removal_event_handler(cm_id);
out:
	mutex_unlock(&ctx->file->mut);
	return ret;
}

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Total 280 100.00% 9 100.00%



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;

	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)) {
		mutex_unlock(&file->mut);

		if (file->filp->f_flags & O_NONBLOCK)
			return -EAGAIN;

		if (wait_event_interruptible(file->poll_wait,
					     !list_empty(&file->event_list)))
			return -ERESTARTSYS;

		mutex_lock(&file->mut);
	}

	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;
}

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static int ucma_get_qp_type(struct rdma_ucm_create_id *cmd, enum ib_qp_type *qp_type)
{
	switch (cmd->ps) {
	case RDMA_PS_TCP:
		*qp_type = IB_QPT_RC;
		return 0;
	case RDMA_PS_UDP:
	case RDMA_PS_IPOIB:
		*qp_type = IB_QPT_UD;
		return 0;
	case RDMA_PS_IB:
		*qp_type = cmd->qp_type;
		return 0;
	default:
		return -EINVAL;
	}
}

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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;
	enum ib_qp_type qp_type;
	int ret;

	if (out_len < sizeof(resp))
		return -ENOSPC;

	if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
		return -EFAULT;

	ret = ucma_get_qp_type(&cmd, &qp_type);
	if (ret)
		return ret;

	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(current->nsproxy->net_ns,
				    ucma_event_handler, ctx, cmd.ps, qp_type);
	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;
}

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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);
}

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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);
	}
}

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/*
 * ucma_free_ctx is called after the underlying rdma CM-ID is destroyed. At
 * this point, no new events will be reported from the hardware. However, we
 * still need to cleanup the UCMA context for this ID. Specifically, there
 * might be events that have not yet been consumed by the user space software.
 * These might include pending connect requests which we have not completed
 * processing.  We cannot call rdma_destroy_id while holding the lock of the
 * context (file->mut), as it might cause a deadlock. We therefore extract all
 * relevant events from the context pending events list while holding the
 * mutex. After that we release them as needed.
 */


static int ucma_free_ctx(struct ucma_context *ctx)
{
	int events_reported;
	struct ucma_event *uevent, *tmp;
	LIST_HEAD(list);


	ucma_cleanup_multicast(ctx);

	/* Cleanup events not yet reported to the user. */
	mutex_lock(&ctx->file->mut);
	list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) {
		if (uevent->ctx == ctx)
			list_move_tail(&uevent->list, &list);
	}
	list_del(&ctx->list);
	mutex_unlock(&ctx->file->mut);

	list_for_each_entry_safe(uevent, tmp, &list, list) {
		list_del(&uevent->list);
		if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST)
			rdma_destroy_id(uevent->cm_id);
		kfree(uevent);
	}

	events_reported = ctx->events_reported;
	kfree(ctx);
	return events_reported;
}

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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);

	mutex_lock(&ctx->file->mut);
	ctx->destroying = 1;
	mutex_unlock(&ctx->file->mut);

	flush_workqueue(ctx->file->close_wq);
	/* At this point it's guaranteed that there is no inflight
         * closing task */
	mutex_lock(&mut);
	if (!ctx->closing) {
		mutex_unlock(&mut);
		ucma_put_ctx(ctx);
		wait_for_completion(&ctx->comp);
		rdma_destroy_id(ctx->cm_id);
	} else {
		mutex_unlock(&mut);
	}

	resp.events_reported = ucma_free_ctx(ctx);
	if (copy_to_user((void __user *)(unsigned long)cmd.response,
			 &resp, sizeof(resp)))
		ret = -EFAULT;

	return ret;
}

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static ssize_t ucma_bind_ip(struct ucma_file *file, const char __user *inbuf,
			      int in_len, int out_len)
{
	struct rdma_ucm_bind_ip 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;
}

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static ssize_t ucma_bind(struct ucma_file *file, const char __user *inbuf,
			 int in_len, int out_len)
{
	struct rdma_ucm_bind cmd;
	struct sockaddr *addr;
	struct ucma_context *ctx;
	int ret;

	if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
		return -EFAULT;

	addr = (struct sockaddr *) &cmd.addr;
	if (cmd.reserved || !cmd.addr_size || (cmd.addr_size != rdma_addr_size(addr)))
		return -EINVAL;

	ctx = ucma_get_ctx(file, cmd.id);
	if (IS_ERR(ctx))
		return PTR_ERR(ctx);

	ret = rdma_bind_addr(ctx->cm_id, addr);
	ucma_put_ctx(ctx);
	return ret;
}

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static ssize_t ucma_resolve_ip(struct ucma_file *file,
			       const char __user *inbuf,
			       int in_len, int out_len)
{
	struct rdma_ucm_resolve_ip 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;
}

Contributors
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sean hefty sean hefty 119 100.00% 2 100.00%
Total 119 100.00% 2 100.00%



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 sockaddr *src, *dst;
	struct ucma_context *ctx;
	int ret;

	if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
		return -EFAULT;

	src = (struct sockaddr *) &cmd.src_addr;
	dst = (struct sockaddr *) &cmd.dst_addr;
	if (cmd.reserved || (cmd.src_size && (cmd.src_size != rdma_addr_size(src))) ||
	    !cmd.dst_size || (cmd.dst_size != rdma_addr_size(dst)))
		return -EINVAL;

	ctx = ucma_get_ctx(file, cmd.id);
	if (IS_ERR(ctx))
		return PTR_ERR(ctx);

	ret = rdma_resolve_addr(ctx->cm_id, src, dst, cmd.timeout_ms);
	ucma_put_ctx(ctx);
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
sean hefty sean hefty 178 100.00% 1 100.00%
Total 178 100.00% 1 100.00%



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;
}

Contributors
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sean hefty sean hefty 99 100.00% 1 100.00%
Total 99 100.00% 1 100.00%



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;
		rdma_addr_get_dgid(dev_addr,
				   (union ib_gid *) &resp->ib_route[0].dgid);
		rdma_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;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
sean hefty sean hefty 155 100.00% 2 100.00%
Total 155 100.00% 2 100.00%



static void ucma_copy_iboe_route(struct rdma_ucm_query_route_resp *resp,
				 struct rdma_route *route)
{

	resp->num_paths = route->num_paths;
	switch (route->num_paths) {
	case 0:
		rdma_ip2gid((struct sockaddr *)&route->addr.dst_addr,
			    (union ib_gid *)&resp->ib_route[0].dgid);
		rdma_ip2gid((struct sockaddr *)&route->addr.src_addr,
			    (union ib_gid *)&resp->ib_route[0].sgid);
		resp->ib_route[0].pkey = cpu_to_be16(0xffff);
		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;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
eli cohen eli cohen 138 87.34% 2 66.67%
moni shoua moni shoua 20 12.66% 1 33.33%
Total 158 100.00% 3 100.00%



static void ucma_copy_iw_route(struct rdma_ucm_query_route_resp *resp,
			       struct rdma_route *route)
{
	struct rdma_dev_addr *dev_addr;

	dev_addr = &route->addr.dev_addr;
	rdma_addr_get_dgid(dev_addr, (union ib_gid *) &resp->ib_route[0].dgid);
	rdma_addr_get_sgid(dev_addr, (union ib_gid *) &resp->ib_route[0].sgid);
}

Contributors
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steve wise steve wise 70 100.00% 1 100.00%
Total 70 100.00% 1 100.00%



static ssize_t ucma_query_route(struct ucma_file *file,
				const char __user *inbuf,
				int in_len, int out_len)
{
	struct rdma_ucm_query 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 = (struct sockaddr *) &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 = (struct sockaddr *) &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 = (__force __u64) ctx->cm_id->device->node_guid;
	resp.port_num = ctx->cm_id->port_num;

	if (rdma_cap_ib_sa(ctx->cm_id->device, ctx->cm_id->port_num))
		ucma_copy_ib_route(&resp, &ctx->cm_id->route);
	else if (rdma_protocol_roce(ctx->cm_id->device, ctx->cm_id->port_num))
		ucma_copy_iboe_route(&resp, &ctx->cm_id->route);
	else if (rdma_protocol_iwarp(ctx->cm_id->device, ctx->cm_id->port_num))
		ucma_copy_iw_route(&resp, &ctx->cm_id->route);

out:
	if (copy_to_user((void __user *)(unsigned long)cmd.response,
			 &resp, sizeof(resp)))
		ret = -EFAULT;

	ucma_put_ctx(ctx);
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
sean hefty sean hefty 292 77.66% 2 22.22%
michael wang michael wang 34 9.04% 2 22.22%
eli cohen eli cohen 22 5.85% 1 11.11%
roland dreier roland dreier 14 3.72% 2 22.22%
steve wise steve wise 13 3.46% 1 11.11%
ira weiny ira weiny 1 0.27% 1 11.11%
Total 376 100.00% 9 100.00%



static void ucma_query_device_addr(struct rdma_cm_id *cm_id,
				   struct rdma_ucm_query_addr_resp *resp)
{
	if (!cm_id->device)
		return;

	resp->node_guid = (__force __u64) cm_id->device->node_guid;
	resp->port_num = cm_id->port_num;
	resp->pkey = (__force __u16) cpu_to_be16(
		     ib_addr_get_pkey(&cm_id->route.addr.dev_addr));
}

Contributors
Person Tokens Prop Commits CommitProp
sean hefty sean hefty 69 100.00% 1 100.00%
Total 69 100.00% 1 100.00%



static ssize_t ucma_query_addr(struct ucma_context *ctx,
			       void __user *response, int out_len)
{
	struct rdma_ucm_query_addr_resp resp;
	struct sockaddr *addr;
	int ret = 0;

	if (out_len < sizeof(resp))
		return -ENOSPC;

	memset(&resp, 0, sizeof resp);

	addr = (struct sockaddr *) &ctx->cm_id->route.addr.src_addr;
	resp.src_size = rdma_addr_size(addr);
	memcpy(&resp.src_addr, addr, resp.src_size);

	addr = (struct sockaddr *) &ctx->cm_id->route.addr.dst_addr;
	resp.dst_size = rdma_addr_size(addr);
	memcpy(&resp.dst_addr, addr, resp.dst_size);

	ucma_query_device_addr(ctx->cm_id, &resp);

	if (copy_to_user(response, &resp, sizeof(resp)))
		ret = -EFAULT;

	return ret;
}

Contributors
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sean hefty sean hefty 172 100.00% 1 100.00%
Total 172 100.00% 1 100.00%



static ssize_t ucma_query_path(struct ucma_context *ctx,
			       void __user *response, int out_len)
{
	struct rdma_ucm_query_path_resp *resp;
	int i, ret = 0;

	if (out_len < sizeof(*resp))
		return -ENOSPC;

	resp = kzalloc(out_len, GFP_KERNEL);
	if (!resp)
		return -ENOMEM;

	resp->num_paths = ctx->cm_id->route.num_paths;
	for (i = 0, out_len -= sizeof(*resp);
	     i < resp->num_paths && out_len > sizeof(struct ib_path_rec_data);
	     i++, out_len -= sizeof(struct ib_path_rec_data)) {

		resp->path_data[i].flags = IB_PATH_GMP | IB_PATH_PRIMARY |
					   IB_PATH_BIDIRECTIONAL;
		ib_sa_pack_path(&ctx->cm_id->route.path_rec[i],
				&resp->path_data[i].path_rec);
	}

	if (copy_to_user(response, resp,
			 sizeof(*resp) + (i * sizeof(struct ib_path_rec_data))))
		ret = -EFAULT;

	kfree(resp);
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
sean hefty sean hefty 194 100.00% 1 100.00%
Total 194 100.00% 1 100.00%



static ssize_t ucma_query_gid(struct ucma_context *ctx,
			      void __user *response, int out_len)
{
	struct rdma_ucm_query_addr_resp resp;
	struct sockaddr_ib *addr;
	int ret = 0;

	if (out_len < sizeof(resp))
		return -ENOSPC;

	memset(&resp, 0, sizeof resp);

	ucma_query_device_addr(ctx->cm_id, &resp);

	addr = (struct sockaddr_ib *) &resp.src_addr;
	resp.src_size = sizeof(*addr);
	if (ctx->cm_id->route.addr.src_addr.ss_family == AF_IB) {
		memcpy(addr, &ctx->cm_id->route.addr.src_addr, resp.src_size);
	} else {
		addr->sib_family = AF_IB;
		addr->sib_pkey = (__force __be16) resp.pkey;
		rdma_addr_get_sgid(&ctx->cm_id->route.addr.dev_addr,
				   (union ib_gid *) &addr->sib_addr);
		addr->sib_sid = rdma_get_service_id(ctx->cm_id, (struct sockaddr *)
						    &ctx->cm_id->route.addr.src_addr);
	}

	addr = (struct sockaddr_ib *) &resp.dst_addr;
	resp.dst_size = sizeof(*addr);
	if (ctx->cm_id->route.addr.dst_addr.ss_family == AF_IB) {
		memcpy(addr, &ctx->cm_id->route.addr.dst_addr, resp.dst_size);
	} else {
		addr->sib_family = AF_IB;
		addr->sib_pkey = (__force __be16) resp.pkey;
		rdma_addr_get_dgid(&ctx->cm_id->route.addr.dev_addr,
				   (union ib_gid *) &addr->sib_addr);
		addr->sib_sid = rdma_get_service_id(ctx->cm_id, (struct sockaddr *)
						    &ctx->cm_id->route.addr.dst_addr);
	}

	if (copy_to_user(response, &resp, sizeof(resp)))
		ret = -EFAULT;

	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
sean hefty sean hefty 354 100.00% 1 100.00%
Total 354 100.00% 1 100.00%



static ssize_t ucma_query(struct ucma_file *file,
			  const char __user *inbuf,
			  int in_len, int out_len)
{
	struct rdma_ucm_query cmd;
	struct ucma_context *ctx;
	void __user *response;
	int ret;

	if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
		return -EFAULT;

	response = (void __user *)(unsigned long) cmd.response;
	ctx = ucma_get_ctx(file, cmd.id);
	if (IS_ERR(ctx))
		return PTR_ERR(ctx);

	switch (cmd.option) {
	case RDMA_USER_CM_QUERY_ADDR:
		ret = ucma_query_addr(ctx, response, out_len);
		break;
	case RDMA_USER_CM_QUERY_PATH:
		ret = ucma_query_path(ctx, response, out_len);
		break;
	case RDMA_USER_CM_QUERY_GID:
		ret = ucma_query_gid(ctx, response, out_len);
		break;
	default:
		ret = -ENOSYS;
		break;
	}

	ucma_put_ctx(ctx);
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
sean hefty sean hefty 166 100.00% 3 100.00%
Total 166 100.00% 3 100.00%



static void ucma_copy_conn_param(struct rdma_cm_id *id,
				 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;
	dst->qkey = (id->route.addr.src_addr.ss_family == AF_IB) ? src->qkey : 0;
}

Contributors
Person Tokens Prop Commits CommitProp
sean hefty sean hefty 117 100.00% 2 100.00%
Total 117 100.00% 2 100.00%



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(ctx->cm_id, &conn_param, &cmd.conn_param);
	ret = rdma_connect(ctx->cm_id, &conn_param);
	ucma_put_ctx(ctx);
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
sean hefty sean hefty 130 100.00% 2 100.00%
Total 130 100.00% 2 100.00%



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 < max_backlog ?
		       cmd.backlog : max_backlog;
	ret = rdma_listen(ctx->cm_id, ctx->backlog);
	ucma_put_ctx(ctx);
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
sean hefty sean hefty 119 98.35% 1 50.00%
steve wise steve wise 2 1.65% 1 50.00%
Total 121 100.00% 2 100.00%



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) {
		ucma_copy_conn_param(ctx->cm_id, &conn_param, &cmd.conn_param);
		mutex_lock(&file->mut);
		ret = rdma_accept(ctx->cm_id, &conn_param);
		if (!ret)
			ctx->uid = cmd.uid;
		mutex_unlock(&file->mut);
	} else
		ret = rdma_accept(ctx->cm_id, NULL);

	ucma_put_ctx(ctx);
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
sean hefty sean hefty 168 100.00% 3 100.00%
Total 168 100.00% 3 100.00%



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;
}

Contributors
Person Tokens Prop Commits CommitProp
sean hefty sean hefty 103 100.00% 1 100.00%
Total 103 100.00% 1 100.00%



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;
}

Contributors
Person Tokens Prop Commits CommitProp
sean hefty sean hefty 95 100.00% 1 100.00%
Total 95 100.00% 1 100.00%



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;
}

Contributors
Person Tokens Prop Commits CommitProp
sean hefty sean hefty 198 100.00% 1 100.00%
Total 198 100.00% 1 100.00%



static int ucma_set_option_id(struct ucma_context *ctx, int optname,
			      void *optval, size_t optlen)
{
	int ret = 0;

	switch (optname) {
	case RDMA_OPTION_ID_TOS:
		if (optlen != sizeof(u8)) {
			ret = -EINVAL;
			break;
		}
		rdma_set_service_type(ctx->cm_id, *((u8 *) optval));
		break;
	case RDMA_OPTION_ID_REUSEADDR:
		if (optlen != sizeof(int)) {
			ret = -EINVAL;
			break;
		}
		ret = rdma_set_reuseaddr(ctx->cm_id, *((int *) optval) ? 1 : 0);
		break;
	case RDMA_OPTION_ID_AFONLY:
		if (optlen != sizeof(int)) {
			ret = -EINVAL;
			break;
		}
		ret = rdma_set_afonly(ctx->cm_id, *((int *) optval) ? 1 : 0);
		break;
	default:
		ret = -ENOSYS;
	}

	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
sean hefty sean hefty 164 100.00% 3 100.00%
Total 164 100.00% 3 100.00%



static int ucma_set_ib_path(struct ucma_context *ctx,
			    struct ib_path_rec_data *path_data, size_t optlen)
{
	struct ib_sa_path_rec sa_path;
	struct rdma_cm_event event;
	int ret;

	if (optlen % sizeof(*path_data))
		return -EINVAL;

	for (; optlen; optlen -= sizeof(*path_data), path_data++) {
		if (path_data->flags == (IB_PATH_GMP | IB_PATH_PRIMARY |
					 IB_PATH_BIDIRECTIONAL))
			break;
	}

	if (!optlen)
		return -EINVAL;

	memset(&sa_path, 0, sizeof(sa_path));

	ib_sa_unpack_path(path_data->path_rec, &sa_path);
	ret = rdma_set_ib_paths(ctx->cm_id, &sa_path, 1);
	if (ret)
		return ret;

	memset(&event, 0, sizeof event);
	event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
	return ucma_event_handler(ctx->cm_id, &event);
}

Contributors
Person Tokens Prop Commits CommitProp
sean hefty sean hefty 145 91.77% 1 50.00%
ilya nelkenbaum ilya nelkenbaum 13 8.23% 1 50.00%
Total 158 100.00% 2 100.00%



static int ucma_set_option_ib(struct ucma_context *ctx, int optname,
			      void *optval, size_t optlen)
{
	int ret;

	switch (optname) {
	case RDMA_OPTION_IB_PATH:
		ret = ucma_set_ib_path(ctx, optval, optlen);
		break;
	default:
		ret = -ENOSYS;
	}

	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
sean hefty sean hefty 54 100.00% 1 100.00%
Total 54 100.00% 1 100.00%



static int ucma_set_option_level(struct ucma_context *ctx, int level,
				 int optname, void *optval, size_t optlen)
{
	int ret;

	switch (level) {
	case RDMA_OPTION_ID:
		ret = ucma_set_option_id(ctx, optname, optval, optlen);
		break;
	case RDMA_OPTION_IB:
		ret = ucma_set_option_ib(ctx, optname, optval, optlen);
		break;
	default:
		ret = -ENOSYS;
	}

	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
sean hefty sean hefty 76 100.00% 2 100.00%
Total 76 100.00% 2 100.00%



static ssize_t ucma_set_option(struct ucma_file *file, const char __user *inbuf,
			       int in_len, int out_len)
{
	struct rdma_ucm_set_option cmd;
	struct ucma_context *ctx;
	void *optval;
	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);

	optval = memdup_user((void __user *) (unsigned long) cmd.optval,
			     cmd.optlen);
	if (IS_ERR(optval)) {
		ret = PTR_ERR(optval);
		goto out;
	}

	ret = ucma_set_option_level(ctx, cmd.level, cmd.optname, optval,
				    cmd.optlen);
	kfree(optval);

out:
	ucma_put_ctx(ctx);
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
sean hefty sean hefty 145 91.19% 1 50.00%
roland dreier roland dreier 14 8.81% 1 50.00%
Total 159 100.00% 2 100.00%



static ssize_t ucma_notify(struct ucma_file *file, const char __user *inbuf,
			   int in_len, int out_len)
{
	struct rdma_ucm_notify 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_notify(ctx->cm_id, (enum ib_event_type) cmd.event);
	ucma_put_ctx(ctx);
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
sean hefty sean hefty 103 100.00% 1 100.00%
Total 103 100.00% 1 100.00%



static ssize_t ucma_process_join(struct ucma_file *file,
				 struct rdma_ucm_join_mcast *cmd,  int out_len)
{
	struct rdma_ucm_create_id_resp resp;
	struct ucma_context *ctx;
	struct ucma_multicast *mc;
	struct sockaddr *addr;
	int ret;

	if (out_len < sizeof(resp))
		return -ENOSPC;

	addr = (struct sockaddr *) &cmd->addr;
	if (cmd->reserved || !cmd->addr_size || (cmd->addr_size != rdma_addr_size(addr)))
		return -EINVAL;

	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 (!mc) {
		ret = -ENOMEM;
		goto err1;
	}

	mc->uid = cmd->uid;
	memcpy(&mc->addr, addr, cmd->addr_size);
	ret = rdma_join_multicast(ctx->cm_id, (struct sockaddr *) &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, (struct sockaddr *) &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;
}

Contributors
Person Tokens Prop Commits CommitProp
sean hefty sean hefty 322 96.12% 3 60.00%
roland dreier roland dreier 10 2.99% 1 20.00%
julien brunel julien brunel 3 0.90% 1 20.00%
Total 335 100.00% 5 100.00%



static ssize_t ucma_join_ip_multicast(struct ucma_file *file,
				      const char __user *inbuf,
				      int in_len, int out_len)
{
	struct rdma_ucm_join_ip_mcast cmd;
	struct rdma_ucm_join_mcast join_cmd;

	if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
		return -EFAULT;

	join_cmd.response = cmd.response;
	join_cmd.uid = cmd.uid;
	join_cmd.id = cmd.id;
	join_cmd.addr_size = rdma_addr_size((struct sockaddr *) &cmd.addr);
	join_cmd.reserved = 0;
	memcpy(&join_cmd.addr, &cmd.addr, join_cmd.addr_size);

	return ucma_process_join(file, &join_cmd, out_len);
}

Contributors
Person Tokens Prop Commits CommitProp
sean hefty sean hefty 125 100.00% 1 100.00%
Total 125 100.00% 1 100.00%



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;

	if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
		return -EFAULT;

	return ucma_process_join(file, &cmd, out_len);
}

Contributors
Person Tokens Prop Commits CommitProp
sean hefty sean hefty 57 100.00% 1 100.00%
Total 57 100.00% 1 100.00%



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 if (!atomic_inc_not_zero(&mc->ctx->ref))
		mc = ERR_PTR(-ENXIO);
	else
		idr_remove(&multicast_idr, mc->id);
	mutex_unlock(&mut);

	if (IS_ERR(mc)) {
		ret = PTR_ERR(mc);
		goto out;
	}

	rdma_leave_multicast(mc->ctx->cm_id, (struct sockaddr *) &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);
	resp.events_reported = mc->events_reported;
	kfree(mc);

	if (copy_to_user((void __user *)(unsigned long)cmd.response,
			 &resp, sizeof(resp)))
		ret = -EFAULT;
out:
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
sean hefty sean hefty 267 91.13% 1 33.33%
jason gunthorpe jason gunthorpe 21 7.17% 1 33.33%
roland dreier roland dreier 5 1.71% 1 33.33%
Total 293 100.00% 3 100.00%



static void ucma_lock_files(struct ucma_file *file1, struct ucma_file *file2)
{
	/* Acquire mutex's based on pointer comparison to prevent deadlock. */
	if (file1 < file2) {
		mutex_lock(&file1->mut);
		mutex_lock_nested(&file2->mut, SINGLE_DEPTH_NESTING);
	} else {
		mutex_lock(&file2->mut);
		mutex_lock_nested(&file1->mut, SINGLE_DEPTH_NESTING);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
sean hefty sean hefty 58 90.62% 1 50.00%
haggai eran haggai eran 6 9.38% 1 50.00%
Total 64 100.00% 2 100.00%



static void ucma_unlock_files(struct ucma_file *file1, struct ucma_file *file2)
{
	if (file1 < file2) {
		mutex_unlock(&file2->mut);
		mutex_unlock(&file1->mut);
	} else {
		mutex_unlock(&file1->mut);
		mutex_unlock(&file2->mut);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
sean hefty sean hefty 59 100.00% 1 100.00%
Total 59 100.00% 1 100.00%



static void ucma_move_events(struct ucma_context *ctx, struct ucma_file *file)
{
	struct ucma_event *uevent, *tmp;

	list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list)
		if (uevent->ctx == ctx)
			list_move_tail(&uevent->list, &file->event_list);
}

Contributors
Person Tokens Prop Commits CommitProp
sean hefty sean hefty 55 100.00% 1 100.00%
Total 55 100.00% 1 100.00%



static ssize_t ucma_migrate_id(struct ucma_file *new_file,
			       const char __user *inbuf,
			       int in_len, int out_len)
{
	struct rdma_ucm_migrate_id cmd;
	struct rdma_ucm_migrate_resp resp;
	struct ucma_context *ctx;
	struct fd f;
	struct ucma_file *cur_file;
	int ret = 0;

	if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
		return -EFAULT;

	/* Get current fd to protect against it being closed */
	f = fdget(cmd.fd);
	if (!f.file)
		return -ENOENT;

	/* Validate current fd and prevent destruction of id. */
	ctx = ucma_get_ctx(f.file->private_data, cmd.id);
	if (IS_ERR(ctx)) {
		ret = PTR_ERR(ctx);
		goto file_put;
	}

	cur_file = ctx->file;
	if (cur_file == new_file) {
		resp.events_reported = ctx->events_reported;
		goto response;
	}

	/*
         * Migrate events between fd's, maintaining order, and avoiding new
         * events being added before existing events.
         */
	ucma_lock_files(cur_file, new_file);
	mutex_lock(&mut);

	list_move_tail(&ctx->list, &new_file->ctx_list);
	ucma_move_events(ctx, new_file);
	ctx->file = new_file;
	resp.events_reported = ctx->events_reported;

	mutex_unlock(&mut);
	ucma_unlock_files(cur_file, new_file);

response:
	if (copy_to_user((void __user *)(unsigned long)cmd.response,
			 &resp, sizeof(resp)))
		ret = -EFAULT;

	ucma_put_ctx(ctx);
file_put:
	fdput(f);
	return ret;
}

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sean hefty sean hefty 247 95.37% 1 50.00%
al viro al viro 12 4.63% 1 50.00%
Total 259 100.00% 2 100.00%


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_IP]	 = ucma_bind_ip,
	[RDMA_USER_CM_CMD_RESOLVE_IP]	 = ucma_resolve_ip,
	[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]	 = ucma_set_option,
	[RDMA_USER_CM_CMD_NOTIFY]	 = ucma_notify,
	[RDMA_USER_CM_CMD_JOIN_IP_MCAST] = ucma_join_ip_multicast,
	[RDMA_USER_CM_CMD_LEAVE_MCAST]	 = ucma_leave_multicast,
	[RDMA_USER_CM_CMD_MIGRATE_ID]	 = ucma_migrate_id,
	[RDMA_USER_CM_CMD_QUERY]	 = ucma_query,
	[RDMA_USER_CM_CMD_BIND]		 = ucma_bind,
	[RDMA_USER_CM_CMD_RESOLVE_ADDR]	 = ucma_resolve_addr,
	[RDMA_USER_CM_CMD_JOIN_MCAST]	 = ucma_join_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 (WARN_ON_ONCE(!ib_safe_file_access(filp)))
		return -EACCES;

	if (len < sizeof(hdr))
		return -EINVAL;

	if (copy_from_user(&hdr, buf, sizeof(hdr)))
		return -EFAULT;

	if (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;
}

Contributors
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sean hefty sean hefty 157 91.28% 1 50.00%
jason gunthorpe jason gunthorpe 15 8.72% 1 50.00%
Total 172 100.00% 2 100.00%



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;
}

Contributors
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sean hefty sean hefty 64 100.00% 1 100.00%
Total 64 100.00% 1 100.00%

/*
 * ucma_open() does not need the BKL:
 *
 *  - no global state is referred to;
 *  - there is no ioctl method to race against;
 *  - no further module initialization is required for open to work
 *    after the device is registered.
 */


static int ucma_open(struct inode *inode, struct file *filp)
{
	struct ucma_file *file;

	file = kmalloc(sizeof *file, GFP_KERNEL);
	if (!file)
		return -ENOMEM;

	file->close_wq = create_singlethread_workqueue("ucma_close_id");
	if (!file->close_wq) {
		kfree(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 nonseekable_open(inode, filp);
}

Contributors
Person Tokens Prop Commits CommitProp
sean hefty sean hefty 87 72.50% 1 33.33%
sasha levin sasha levin 27 22.50% 1 33.33%
roland dreier roland dreier 6 5.00% 1 33.33%
Total 120 100.00% 3 100.00%



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) {
		ctx->destroying = 1;
		mutex_unlock(&file->mut);

		mutex_lock(&mut);
		idr_remove(&ctx_idr, ctx->id);
		mutex_unlock(&mut);

		flush_workqueue(file->close_wq);
		/* At that step once ctx was marked as destroying and workqueue
                 * was flushed we are safe from any inflights handlers that
                 * might put other closing task.
                 */
		mutex_lock(&mut);
		if (!ctx->closing) {
			mutex_unlock(&mut);
			/* rdma_destroy_id ensures that no event handlers are
                         * inflight for that id before releasing it.
                         */
			rdma_destroy_id(ctx->cm_id);
		} else {
			mutex_unlock(&mut);
		}

		ucma_free_ctx(ctx);
		mutex_lock(&file->mut);
	}
	mutex_unlock(&file->mut);
	destroy_workqueue(file->close_wq);
	kfree(file);
	return 0;
}

Contributors
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sean hefty sean hefty 112 65.50% 1 50.00%
yishai hadas yishai hadas 59 34.50% 1 50.00%
Total 171 100.00% 2 100.00%


static const struct file_operations ucma_fops = {
	.owner 	 = THIS_MODULE,
	.open 	 = ucma_open,
	.release = ucma_close,
	.write	 = ucma_write,
	.poll    = ucma_poll,
	.llseek	 = no_llseek,
};


static struct miscdevice ucma_misc = {
	.minor		= MISC_DYNAMIC_MINOR,
	.name		= "rdma_cm",
	.nodename	= "infiniband/rdma_cm",
	.mode		= 0666,
	.fops		= &ucma_fops,
};



static ssize_t show_abi_version(struct device *dev,
				struct device_attribute *attr,
				char *buf)
{
	return sprintf(buf, "%d\n", RDMA_USER_CM_ABI_VERSION);
}
Contributors
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sean hefty sean hefty 30 100.00% 1 100.00%
Total 30 100.00% 1 100.00%

static 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 = device_create_file(ucma_misc.this_device, &dev_attr_abi_version);
	if (ret) {
		pr_err("rdma_ucm: couldn't create abi_version attr\n");
		goto err1;
	}

	ucma_ctl_table_hdr = register_net_sysctl(&init_net, "net/rdma_ucm", ucma_ctl_table);
	if (!ucma_ctl_table_hdr) {
		pr_err("rdma_ucm: couldn't register sysctl paths\n");
		ret = -ENOMEM;
		goto err2;
	}
	return 0;
err2:
	device_remove_file(ucma_misc.this_device, &dev_attr_abi_version);
err1:
	misc_deregister(&ucma_misc);
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
sean hefty sean hefty 64 57.66% 1 20.00%
steve wise steve wise 40 36.04% 1 20.00%
eric w. biederman eric w. biederman 5 4.50% 2 40.00%
parav pandit parav pandit 2 1.80% 1 20.00%
Total 111 100.00% 5 100.00%



static void __exit ucma_cleanup(void)
{
	unregister_net_sysctl_table(ucma_ctl_table_hdr);
	device_remove_file(ucma_misc.this_device, &dev_attr_abi_version);
	misc_deregister(&ucma_misc);
	idr_destroy(&ctx_idr);
	idr_destroy(&multicast_idr);
}

Contributors
Person Tokens Prop Commits CommitProp
sean hefty sean hefty 31 73.81% 1 25.00%
johannes thumshirn johannes thumshirn 6 14.29% 1 25.00%
steve wise steve wise 4 9.52% 1 25.00%
eric w. biederman eric w. biederman 1 2.38% 1 25.00%
Total 42 100.00% 4 100.00%


module_init(ucma_init);

module_exit(ucma_cleanup);
Overall Contributors
Person Tokens Prop Commits CommitProp
sean hefty sean hefty 7784 87.80% 25 41.67%
yishai hadas yishai hadas 450 5.08% 1 1.67%
steve wise steve wise 181 2.04% 2 3.33%
eli cohen eli cohen 160 1.80% 2 3.33%
roland dreier roland dreier 66 0.74% 6 10.00%
jason gunthorpe jason gunthorpe 36 0.41% 2 3.33%
michael wang michael wang 34 0.38% 2 3.33%
tejun heo tejun heo 31 0.35% 2 3.33%
sasha levin sasha levin 27 0.30% 1 1.67%
moni shoua moni shoua 20 0.23% 1 1.67%
ilya nelkenbaum ilya nelkenbaum 13 0.15% 1 1.67%
al viro al viro 12 0.14% 1 1.67%
tatyana nikolova tatyana nikolova 10 0.11% 1 1.67%
guy shapiro guy shapiro 9 0.10% 2 3.33%
eric w. biederman eric w. biederman 6 0.07% 2 3.33%
haggai eran haggai eran 6 0.07% 1 1.67%
johannes thumshirn johannes thumshirn 6 0.07% 1 1.67%
parav pandit parav pandit 3 0.03% 1 1.67%
paul gortmaker paul gortmaker 3 0.03% 1 1.67%
julien brunel julien brunel 3 0.03% 1 1.67%
alexey dobriyan alexey dobriyan 3 0.03% 1 1.67%
joe perches joe perches 1 0.01% 1 1.67%
ira weiny ira weiny 1 0.01% 1 1.67%
arjan van de ven arjan van de ven 1 0.01% 1 1.67%
Total 8866 100.00% 60 100.00%
  Directory: drivers/infiniband/core

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
	Person	Tokens	Prop	Commits	CommitProp
sean hefty	sean hefty	65	100.00%	1	100.00%
	Total	65	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.7 drivers/infiniband/core/ucma.c

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