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RDMA/cma: Export rdma cm interface to userspace 

Export the rdma cm interfaces to userspace via a misc device.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Sean Hefty 2006-11-30 16:53:41 -08:00 committed by Roland Dreier
parent 628e5f6d39
commit 7521663857
5 changed files with 1092 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/infiniband/core/Makefile
View File

@ -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

874
drivers/infiniband/core/ucma.c Normal file
View File

@ -0,0 +1,874 @@
/*
* 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 ucma_event {
struct ucma_context *ctx;
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 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);
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 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;
uevent->resp.uid = ctx->uid;
uevent->resp.id = ctx->id;
}
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++;
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_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 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);
/* 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_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;
}
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_NOTIFY] = ucma_notify,
};
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 device *dev,
struct device_attribute *attr,
char *buf)
{
return sprintf(buf, "%d\n", RDMA_USER_CM_ABI_VERSION);
}
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) {
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)
{
device_remove_file(ucma_misc.this_device, &dev_attr_abi_version);
misc_deregister(&ucma_misc);
idr_destroy(&ctx_idr);
}
module_init(ucma_init);
module_exit(ucma_cleanup);

5
drivers/infiniband/core/uverbs_marshall.c
View File

@ -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(struct ib_uverbs_ah_attr *dst,
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)

5
include/rdma/ib_marshall.h
View File

@ -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 @@
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);

206
include/rdma/rdma_user_cm.h Normal file
View File

@ -0,0 +1,206 @@
/*
* 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_NOTIFY
};
/*
* 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_notify {
__u32 id;
__u32 event;
};
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 */