1317 lines
34 KiB
C
1317 lines
34 KiB
C
/*
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* Copyright (c) 2005 Topspin Communications. All rights reserved.
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* Copyright (c) 2005, 2006 Cisco Systems. All rights reserved.
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* Copyright (c) 2005 Mellanox Technologies. All rights reserved.
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* Copyright (c) 2005 Voltaire, Inc. All rights reserved.
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* Copyright (c) 2005 PathScale, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/fs.h>
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#include <linux/poll.h>
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#include <linux/sched.h>
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#include <linux/file.h>
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#include <linux/cdev.h>
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#include <linux/anon_inodes.h>
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#include <linux/slab.h>
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#include <linux/sched/mm.h>
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#include <linux/uaccess.h>
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#include <rdma/ib.h>
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#include <rdma/uverbs_std_types.h>
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#include <rdma/rdma_netlink.h>
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#include "uverbs.h"
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#include "core_priv.h"
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#include "rdma_core.h"
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MODULE_AUTHOR("Roland Dreier");
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MODULE_DESCRIPTION("InfiniBand userspace verbs access");
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MODULE_LICENSE("Dual BSD/GPL");
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enum {
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IB_UVERBS_MAJOR = 231,
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IB_UVERBS_BASE_MINOR = 192,
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IB_UVERBS_MAX_DEVICES = RDMA_MAX_PORTS,
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IB_UVERBS_NUM_FIXED_MINOR = 32,
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IB_UVERBS_NUM_DYNAMIC_MINOR = IB_UVERBS_MAX_DEVICES - IB_UVERBS_NUM_FIXED_MINOR,
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};
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#define IB_UVERBS_BASE_DEV MKDEV(IB_UVERBS_MAJOR, IB_UVERBS_BASE_MINOR)
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static dev_t dynamic_uverbs_dev;
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static DEFINE_IDA(uverbs_ida);
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static int ib_uverbs_add_one(struct ib_device *device);
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static void ib_uverbs_remove_one(struct ib_device *device, void *client_data);
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static char *uverbs_devnode(const struct device *dev, umode_t *mode)
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{
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if (mode)
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*mode = 0666;
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return kasprintf(GFP_KERNEL, "infiniband/%s", dev_name(dev));
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}
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static const struct class uverbs_class = {
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.name = "infiniband_verbs",
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.devnode = uverbs_devnode,
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};
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/*
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* Must be called with the ufile->device->disassociate_srcu held, and the lock
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* must be held until use of the ucontext is finished.
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*/
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struct ib_ucontext *ib_uverbs_get_ucontext_file(struct ib_uverbs_file *ufile)
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{
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/*
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* We do not hold the hw_destroy_rwsem lock for this flow, instead
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* srcu is used. It does not matter if someone races this with
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* get_context, we get NULL or valid ucontext.
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*/
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struct ib_ucontext *ucontext = smp_load_acquire(&ufile->ucontext);
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if (!srcu_dereference(ufile->device->ib_dev,
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&ufile->device->disassociate_srcu))
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return ERR_PTR(-EIO);
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if (!ucontext)
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return ERR_PTR(-EINVAL);
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return ucontext;
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}
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EXPORT_SYMBOL(ib_uverbs_get_ucontext_file);
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int uverbs_dealloc_mw(struct ib_mw *mw)
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{
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struct ib_pd *pd = mw->pd;
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int ret;
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ret = mw->device->ops.dealloc_mw(mw);
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if (ret)
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return ret;
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atomic_dec(&pd->usecnt);
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kfree(mw);
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return ret;
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}
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static void ib_uverbs_release_dev(struct device *device)
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{
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struct ib_uverbs_device *dev =
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container_of(device, struct ib_uverbs_device, dev);
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uverbs_destroy_api(dev->uapi);
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cleanup_srcu_struct(&dev->disassociate_srcu);
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mutex_destroy(&dev->lists_mutex);
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mutex_destroy(&dev->xrcd_tree_mutex);
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kfree(dev);
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}
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void ib_uverbs_release_ucq(struct ib_uverbs_completion_event_file *ev_file,
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struct ib_ucq_object *uobj)
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{
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struct ib_uverbs_event *evt, *tmp;
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if (ev_file) {
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spin_lock_irq(&ev_file->ev_queue.lock);
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list_for_each_entry_safe(evt, tmp, &uobj->comp_list, obj_list) {
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list_del(&evt->list);
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kfree(evt);
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}
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spin_unlock_irq(&ev_file->ev_queue.lock);
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uverbs_uobject_put(&ev_file->uobj);
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}
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ib_uverbs_release_uevent(&uobj->uevent);
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}
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void ib_uverbs_release_uevent(struct ib_uevent_object *uobj)
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{
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struct ib_uverbs_async_event_file *async_file = uobj->event_file;
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struct ib_uverbs_event *evt, *tmp;
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if (!async_file)
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return;
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spin_lock_irq(&async_file->ev_queue.lock);
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list_for_each_entry_safe(evt, tmp, &uobj->event_list, obj_list) {
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list_del(&evt->list);
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kfree(evt);
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}
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spin_unlock_irq(&async_file->ev_queue.lock);
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uverbs_uobject_put(&async_file->uobj);
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}
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void ib_uverbs_detach_umcast(struct ib_qp *qp,
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struct ib_uqp_object *uobj)
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{
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struct ib_uverbs_mcast_entry *mcast, *tmp;
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list_for_each_entry_safe(mcast, tmp, &uobj->mcast_list, list) {
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ib_detach_mcast(qp, &mcast->gid, mcast->lid);
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list_del(&mcast->list);
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kfree(mcast);
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}
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}
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static void ib_uverbs_comp_dev(struct ib_uverbs_device *dev)
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{
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complete(&dev->comp);
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}
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void ib_uverbs_release_file(struct kref *ref)
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{
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struct ib_uverbs_file *file =
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container_of(ref, struct ib_uverbs_file, ref);
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struct ib_device *ib_dev;
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int srcu_key;
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release_ufile_idr_uobject(file);
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srcu_key = srcu_read_lock(&file->device->disassociate_srcu);
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ib_dev = srcu_dereference(file->device->ib_dev,
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&file->device->disassociate_srcu);
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if (ib_dev && !ib_dev->ops.disassociate_ucontext)
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module_put(ib_dev->ops.owner);
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srcu_read_unlock(&file->device->disassociate_srcu, srcu_key);
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if (refcount_dec_and_test(&file->device->refcount))
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ib_uverbs_comp_dev(file->device);
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if (file->default_async_file)
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uverbs_uobject_put(&file->default_async_file->uobj);
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put_device(&file->device->dev);
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if (file->disassociate_page)
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__free_pages(file->disassociate_page, 0);
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mutex_destroy(&file->umap_lock);
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mutex_destroy(&file->ucontext_lock);
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kfree(file);
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}
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static ssize_t ib_uverbs_event_read(struct ib_uverbs_event_queue *ev_queue,
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struct file *filp, char __user *buf,
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size_t count, loff_t *pos,
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size_t eventsz)
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{
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struct ib_uverbs_event *event;
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int ret = 0;
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spin_lock_irq(&ev_queue->lock);
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while (list_empty(&ev_queue->event_list)) {
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if (ev_queue->is_closed) {
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spin_unlock_irq(&ev_queue->lock);
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return -EIO;
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}
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spin_unlock_irq(&ev_queue->lock);
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if (filp->f_flags & O_NONBLOCK)
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return -EAGAIN;
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if (wait_event_interruptible(ev_queue->poll_wait,
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(!list_empty(&ev_queue->event_list) ||
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ev_queue->is_closed)))
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return -ERESTARTSYS;
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spin_lock_irq(&ev_queue->lock);
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}
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event = list_entry(ev_queue->event_list.next, struct ib_uverbs_event, list);
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if (eventsz > count) {
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ret = -EINVAL;
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event = NULL;
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} else {
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list_del(ev_queue->event_list.next);
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if (event->counter) {
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++(*event->counter);
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list_del(&event->obj_list);
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}
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}
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spin_unlock_irq(&ev_queue->lock);
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if (event) {
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if (copy_to_user(buf, event, eventsz))
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ret = -EFAULT;
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else
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ret = eventsz;
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}
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kfree(event);
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return ret;
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}
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static ssize_t ib_uverbs_async_event_read(struct file *filp, char __user *buf,
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size_t count, loff_t *pos)
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{
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struct ib_uverbs_async_event_file *file = filp->private_data;
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return ib_uverbs_event_read(&file->ev_queue, filp, buf, count, pos,
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sizeof(struct ib_uverbs_async_event_desc));
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}
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static ssize_t ib_uverbs_comp_event_read(struct file *filp, char __user *buf,
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size_t count, loff_t *pos)
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{
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struct ib_uverbs_completion_event_file *comp_ev_file =
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filp->private_data;
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return ib_uverbs_event_read(&comp_ev_file->ev_queue, filp, buf, count,
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pos,
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sizeof(struct ib_uverbs_comp_event_desc));
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}
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static __poll_t ib_uverbs_event_poll(struct ib_uverbs_event_queue *ev_queue,
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struct file *filp,
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struct poll_table_struct *wait)
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{
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__poll_t pollflags = 0;
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poll_wait(filp, &ev_queue->poll_wait, wait);
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spin_lock_irq(&ev_queue->lock);
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if (!list_empty(&ev_queue->event_list))
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pollflags = EPOLLIN | EPOLLRDNORM;
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else if (ev_queue->is_closed)
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pollflags = EPOLLERR;
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spin_unlock_irq(&ev_queue->lock);
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return pollflags;
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}
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static __poll_t ib_uverbs_async_event_poll(struct file *filp,
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struct poll_table_struct *wait)
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{
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struct ib_uverbs_async_event_file *file = filp->private_data;
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return ib_uverbs_event_poll(&file->ev_queue, filp, wait);
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}
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static __poll_t ib_uverbs_comp_event_poll(struct file *filp,
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struct poll_table_struct *wait)
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{
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struct ib_uverbs_completion_event_file *comp_ev_file =
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filp->private_data;
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return ib_uverbs_event_poll(&comp_ev_file->ev_queue, filp, wait);
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}
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static int ib_uverbs_async_event_fasync(int fd, struct file *filp, int on)
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{
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struct ib_uverbs_async_event_file *file = filp->private_data;
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return fasync_helper(fd, filp, on, &file->ev_queue.async_queue);
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}
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static int ib_uverbs_comp_event_fasync(int fd, struct file *filp, int on)
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{
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struct ib_uverbs_completion_event_file *comp_ev_file =
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filp->private_data;
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return fasync_helper(fd, filp, on, &comp_ev_file->ev_queue.async_queue);
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}
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const struct file_operations uverbs_event_fops = {
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.owner = THIS_MODULE,
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.read = ib_uverbs_comp_event_read,
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.poll = ib_uverbs_comp_event_poll,
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.release = uverbs_uobject_fd_release,
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.fasync = ib_uverbs_comp_event_fasync,
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.llseek = no_llseek,
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};
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const struct file_operations uverbs_async_event_fops = {
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.owner = THIS_MODULE,
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.read = ib_uverbs_async_event_read,
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.poll = ib_uverbs_async_event_poll,
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.release = uverbs_async_event_release,
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.fasync = ib_uverbs_async_event_fasync,
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.llseek = no_llseek,
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};
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void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context)
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{
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struct ib_uverbs_event_queue *ev_queue = cq_context;
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struct ib_ucq_object *uobj;
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struct ib_uverbs_event *entry;
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unsigned long flags;
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if (!ev_queue)
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return;
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spin_lock_irqsave(&ev_queue->lock, flags);
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if (ev_queue->is_closed) {
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spin_unlock_irqrestore(&ev_queue->lock, flags);
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return;
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}
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entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
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if (!entry) {
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spin_unlock_irqrestore(&ev_queue->lock, flags);
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return;
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}
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uobj = cq->uobject;
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entry->desc.comp.cq_handle = cq->uobject->uevent.uobject.user_handle;
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entry->counter = &uobj->comp_events_reported;
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list_add_tail(&entry->list, &ev_queue->event_list);
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list_add_tail(&entry->obj_list, &uobj->comp_list);
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spin_unlock_irqrestore(&ev_queue->lock, flags);
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wake_up_interruptible(&ev_queue->poll_wait);
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kill_fasync(&ev_queue->async_queue, SIGIO, POLL_IN);
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}
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void ib_uverbs_async_handler(struct ib_uverbs_async_event_file *async_file,
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__u64 element, __u64 event,
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struct list_head *obj_list, u32 *counter)
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{
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struct ib_uverbs_event *entry;
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unsigned long flags;
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if (!async_file)
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return;
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spin_lock_irqsave(&async_file->ev_queue.lock, flags);
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if (async_file->ev_queue.is_closed) {
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spin_unlock_irqrestore(&async_file->ev_queue.lock, flags);
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return;
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}
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entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
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if (!entry) {
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spin_unlock_irqrestore(&async_file->ev_queue.lock, flags);
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return;
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}
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entry->desc.async.element = element;
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entry->desc.async.event_type = event;
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entry->desc.async.reserved = 0;
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entry->counter = counter;
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list_add_tail(&entry->list, &async_file->ev_queue.event_list);
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if (obj_list)
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list_add_tail(&entry->obj_list, obj_list);
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spin_unlock_irqrestore(&async_file->ev_queue.lock, flags);
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wake_up_interruptible(&async_file->ev_queue.poll_wait);
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kill_fasync(&async_file->ev_queue.async_queue, SIGIO, POLL_IN);
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}
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static void uverbs_uobj_event(struct ib_uevent_object *eobj,
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struct ib_event *event)
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{
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ib_uverbs_async_handler(eobj->event_file,
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eobj->uobject.user_handle, event->event,
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&eobj->event_list, &eobj->events_reported);
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}
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void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr)
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{
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uverbs_uobj_event(&event->element.cq->uobject->uevent, event);
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}
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void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr)
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{
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/* for XRC target qp's, check that qp is live */
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if (!event->element.qp->uobject)
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return;
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uverbs_uobj_event(&event->element.qp->uobject->uevent, event);
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}
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void ib_uverbs_wq_event_handler(struct ib_event *event, void *context_ptr)
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{
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uverbs_uobj_event(&event->element.wq->uobject->uevent, event);
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}
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void ib_uverbs_srq_event_handler(struct ib_event *event, void *context_ptr)
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{
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uverbs_uobj_event(&event->element.srq->uobject->uevent, event);
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}
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static void ib_uverbs_event_handler(struct ib_event_handler *handler,
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struct ib_event *event)
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{
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ib_uverbs_async_handler(
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container_of(handler, struct ib_uverbs_async_event_file,
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event_handler),
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event->element.port_num, event->event, NULL, NULL);
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}
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void ib_uverbs_init_event_queue(struct ib_uverbs_event_queue *ev_queue)
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{
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spin_lock_init(&ev_queue->lock);
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INIT_LIST_HEAD(&ev_queue->event_list);
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init_waitqueue_head(&ev_queue->poll_wait);
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ev_queue->is_closed = 0;
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ev_queue->async_queue = NULL;
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}
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void ib_uverbs_init_async_event_file(
|
|
struct ib_uverbs_async_event_file *async_file)
|
|
{
|
|
struct ib_uverbs_file *uverbs_file = async_file->uobj.ufile;
|
|
struct ib_device *ib_dev = async_file->uobj.context->device;
|
|
|
|
ib_uverbs_init_event_queue(&async_file->ev_queue);
|
|
|
|
/* The first async_event_file becomes the default one for the file. */
|
|
mutex_lock(&uverbs_file->ucontext_lock);
|
|
if (!uverbs_file->default_async_file) {
|
|
/* Pairs with the put in ib_uverbs_release_file */
|
|
uverbs_uobject_get(&async_file->uobj);
|
|
smp_store_release(&uverbs_file->default_async_file, async_file);
|
|
}
|
|
mutex_unlock(&uverbs_file->ucontext_lock);
|
|
|
|
INIT_IB_EVENT_HANDLER(&async_file->event_handler, ib_dev,
|
|
ib_uverbs_event_handler);
|
|
ib_register_event_handler(&async_file->event_handler);
|
|
}
|
|
|
|
static ssize_t verify_hdr(struct ib_uverbs_cmd_hdr *hdr,
|
|
struct ib_uverbs_ex_cmd_hdr *ex_hdr, size_t count,
|
|
const struct uverbs_api_write_method *method_elm)
|
|
{
|
|
if (method_elm->is_ex) {
|
|
count -= sizeof(*hdr) + sizeof(*ex_hdr);
|
|
|
|
if ((hdr->in_words + ex_hdr->provider_in_words) * 8 != count)
|
|
return -EINVAL;
|
|
|
|
if (hdr->in_words * 8 < method_elm->req_size)
|
|
return -ENOSPC;
|
|
|
|
if (ex_hdr->cmd_hdr_reserved)
|
|
return -EINVAL;
|
|
|
|
if (ex_hdr->response) {
|
|
if (!hdr->out_words && !ex_hdr->provider_out_words)
|
|
return -EINVAL;
|
|
|
|
if (hdr->out_words * 8 < method_elm->resp_size)
|
|
return -ENOSPC;
|
|
|
|
if (!access_ok(u64_to_user_ptr(ex_hdr->response),
|
|
(hdr->out_words + ex_hdr->provider_out_words) * 8))
|
|
return -EFAULT;
|
|
} else {
|
|
if (hdr->out_words || ex_hdr->provider_out_words)
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* not extended command */
|
|
if (hdr->in_words * 4 != count)
|
|
return -EINVAL;
|
|
|
|
if (count < method_elm->req_size + sizeof(*hdr)) {
|
|
/*
|
|
* rdma-core v18 and v19 have a bug where they send DESTROY_CQ
|
|
* with a 16 byte write instead of 24. Old kernels didn't
|
|
* check the size so they allowed this. Now that the size is
|
|
* checked provide a compatibility work around to not break
|
|
* those userspaces.
|
|
*/
|
|
if (hdr->command == IB_USER_VERBS_CMD_DESTROY_CQ &&
|
|
count == 16) {
|
|
hdr->in_words = 6;
|
|
return 0;
|
|
}
|
|
return -ENOSPC;
|
|
}
|
|
if (hdr->out_words * 4 < method_elm->resp_size)
|
|
return -ENOSPC;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t ib_uverbs_write(struct file *filp, const char __user *buf,
|
|
size_t count, loff_t *pos)
|
|
{
|
|
struct ib_uverbs_file *file = filp->private_data;
|
|
const struct uverbs_api_write_method *method_elm;
|
|
struct uverbs_api *uapi = file->device->uapi;
|
|
struct ib_uverbs_ex_cmd_hdr ex_hdr;
|
|
struct ib_uverbs_cmd_hdr hdr;
|
|
struct uverbs_attr_bundle bundle;
|
|
int srcu_key;
|
|
ssize_t ret;
|
|
|
|
if (!ib_safe_file_access(filp)) {
|
|
pr_err_once("uverbs_write: process %d (%s) changed security contexts after opening file descriptor, this is not allowed.\n",
|
|
task_tgid_vnr(current), current->comm);
|
|
return -EACCES;
|
|
}
|
|
|
|
if (count < sizeof(hdr))
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(&hdr, buf, sizeof(hdr)))
|
|
return -EFAULT;
|
|
|
|
method_elm = uapi_get_method(uapi, hdr.command);
|
|
if (IS_ERR(method_elm))
|
|
return PTR_ERR(method_elm);
|
|
|
|
if (method_elm->is_ex) {
|
|
if (count < (sizeof(hdr) + sizeof(ex_hdr)))
|
|
return -EINVAL;
|
|
if (copy_from_user(&ex_hdr, buf + sizeof(hdr), sizeof(ex_hdr)))
|
|
return -EFAULT;
|
|
}
|
|
|
|
ret = verify_hdr(&hdr, &ex_hdr, count, method_elm);
|
|
if (ret)
|
|
return ret;
|
|
|
|
srcu_key = srcu_read_lock(&file->device->disassociate_srcu);
|
|
|
|
buf += sizeof(hdr);
|
|
|
|
memset(bundle.attr_present, 0, sizeof(bundle.attr_present));
|
|
bundle.ufile = file;
|
|
bundle.context = NULL; /* only valid if bundle has uobject */
|
|
bundle.uobject = NULL;
|
|
if (!method_elm->is_ex) {
|
|
size_t in_len = hdr.in_words * 4 - sizeof(hdr);
|
|
size_t out_len = hdr.out_words * 4;
|
|
u64 response = 0;
|
|
|
|
if (method_elm->has_udata) {
|
|
bundle.driver_udata.inlen =
|
|
in_len - method_elm->req_size;
|
|
in_len = method_elm->req_size;
|
|
if (bundle.driver_udata.inlen)
|
|
bundle.driver_udata.inbuf = buf + in_len;
|
|
else
|
|
bundle.driver_udata.inbuf = NULL;
|
|
} else {
|
|
memset(&bundle.driver_udata, 0,
|
|
sizeof(bundle.driver_udata));
|
|
}
|
|
|
|
if (method_elm->has_resp) {
|
|
/*
|
|
* The macros check that if has_resp is set
|
|
* then the command request structure starts
|
|
* with a '__aligned u64 response' member.
|
|
*/
|
|
ret = get_user(response, (const u64 __user *)buf);
|
|
if (ret)
|
|
goto out_unlock;
|
|
|
|
if (method_elm->has_udata) {
|
|
bundle.driver_udata.outlen =
|
|
out_len - method_elm->resp_size;
|
|
out_len = method_elm->resp_size;
|
|
if (bundle.driver_udata.outlen)
|
|
bundle.driver_udata.outbuf =
|
|
u64_to_user_ptr(response +
|
|
out_len);
|
|
else
|
|
bundle.driver_udata.outbuf = NULL;
|
|
}
|
|
} else {
|
|
bundle.driver_udata.outlen = 0;
|
|
bundle.driver_udata.outbuf = NULL;
|
|
}
|
|
|
|
ib_uverbs_init_udata_buf_or_null(
|
|
&bundle.ucore, buf, u64_to_user_ptr(response),
|
|
in_len, out_len);
|
|
} else {
|
|
buf += sizeof(ex_hdr);
|
|
|
|
ib_uverbs_init_udata_buf_or_null(&bundle.ucore, buf,
|
|
u64_to_user_ptr(ex_hdr.response),
|
|
hdr.in_words * 8, hdr.out_words * 8);
|
|
|
|
ib_uverbs_init_udata_buf_or_null(
|
|
&bundle.driver_udata, buf + bundle.ucore.inlen,
|
|
u64_to_user_ptr(ex_hdr.response) + bundle.ucore.outlen,
|
|
ex_hdr.provider_in_words * 8,
|
|
ex_hdr.provider_out_words * 8);
|
|
|
|
}
|
|
|
|
ret = method_elm->handler(&bundle);
|
|
if (bundle.uobject)
|
|
uverbs_finalize_object(bundle.uobject, UVERBS_ACCESS_NEW, true,
|
|
!ret, &bundle);
|
|
out_unlock:
|
|
srcu_read_unlock(&file->device->disassociate_srcu, srcu_key);
|
|
return (ret) ? : count;
|
|
}
|
|
|
|
static const struct vm_operations_struct rdma_umap_ops;
|
|
|
|
static int ib_uverbs_mmap(struct file *filp, struct vm_area_struct *vma)
|
|
{
|
|
struct ib_uverbs_file *file = filp->private_data;
|
|
struct ib_ucontext *ucontext;
|
|
int ret = 0;
|
|
int srcu_key;
|
|
|
|
srcu_key = srcu_read_lock(&file->device->disassociate_srcu);
|
|
ucontext = ib_uverbs_get_ucontext_file(file);
|
|
if (IS_ERR(ucontext)) {
|
|
ret = PTR_ERR(ucontext);
|
|
goto out;
|
|
}
|
|
vma->vm_ops = &rdma_umap_ops;
|
|
ret = ucontext->device->ops.mmap(ucontext, vma);
|
|
out:
|
|
srcu_read_unlock(&file->device->disassociate_srcu, srcu_key);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* The VMA has been dup'd, initialize the vm_private_data with a new tracking
|
|
* struct
|
|
*/
|
|
static void rdma_umap_open(struct vm_area_struct *vma)
|
|
{
|
|
struct ib_uverbs_file *ufile = vma->vm_file->private_data;
|
|
struct rdma_umap_priv *opriv = vma->vm_private_data;
|
|
struct rdma_umap_priv *priv;
|
|
|
|
if (!opriv)
|
|
return;
|
|
|
|
/* We are racing with disassociation */
|
|
if (!down_read_trylock(&ufile->hw_destroy_rwsem))
|
|
goto out_zap;
|
|
/*
|
|
* Disassociation already completed, the VMA should already be zapped.
|
|
*/
|
|
if (!ufile->ucontext)
|
|
goto out_unlock;
|
|
|
|
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
|
|
if (!priv)
|
|
goto out_unlock;
|
|
rdma_umap_priv_init(priv, vma, opriv->entry);
|
|
|
|
up_read(&ufile->hw_destroy_rwsem);
|
|
return;
|
|
|
|
out_unlock:
|
|
up_read(&ufile->hw_destroy_rwsem);
|
|
out_zap:
|
|
/*
|
|
* We can't allow the VMA to be created with the actual IO pages, that
|
|
* would break our API contract, and it can't be stopped at this
|
|
* point, so zap it.
|
|
*/
|
|
vma->vm_private_data = NULL;
|
|
zap_vma_ptes(vma, vma->vm_start, vma->vm_end - vma->vm_start);
|
|
}
|
|
|
|
static void rdma_umap_close(struct vm_area_struct *vma)
|
|
{
|
|
struct ib_uverbs_file *ufile = vma->vm_file->private_data;
|
|
struct rdma_umap_priv *priv = vma->vm_private_data;
|
|
|
|
if (!priv)
|
|
return;
|
|
|
|
/*
|
|
* The vma holds a reference on the struct file that created it, which
|
|
* in turn means that the ib_uverbs_file is guaranteed to exist at
|
|
* this point.
|
|
*/
|
|
mutex_lock(&ufile->umap_lock);
|
|
if (priv->entry)
|
|
rdma_user_mmap_entry_put(priv->entry);
|
|
|
|
list_del(&priv->list);
|
|
mutex_unlock(&ufile->umap_lock);
|
|
kfree(priv);
|
|
}
|
|
|
|
/*
|
|
* Once the zap_vma_ptes has been called touches to the VMA will come here and
|
|
* we return a dummy writable zero page for all the pfns.
|
|
*/
|
|
static vm_fault_t rdma_umap_fault(struct vm_fault *vmf)
|
|
{
|
|
struct ib_uverbs_file *ufile = vmf->vma->vm_file->private_data;
|
|
struct rdma_umap_priv *priv = vmf->vma->vm_private_data;
|
|
vm_fault_t ret = 0;
|
|
|
|
if (!priv)
|
|
return VM_FAULT_SIGBUS;
|
|
|
|
/* Read only pages can just use the system zero page. */
|
|
if (!(vmf->vma->vm_flags & (VM_WRITE | VM_MAYWRITE))) {
|
|
vmf->page = ZERO_PAGE(vmf->address);
|
|
get_page(vmf->page);
|
|
return 0;
|
|
}
|
|
|
|
mutex_lock(&ufile->umap_lock);
|
|
if (!ufile->disassociate_page)
|
|
ufile->disassociate_page =
|
|
alloc_pages(vmf->gfp_mask | __GFP_ZERO, 0);
|
|
|
|
if (ufile->disassociate_page) {
|
|
/*
|
|
* This VMA is forced to always be shared so this doesn't have
|
|
* to worry about COW.
|
|
*/
|
|
vmf->page = ufile->disassociate_page;
|
|
get_page(vmf->page);
|
|
} else {
|
|
ret = VM_FAULT_SIGBUS;
|
|
}
|
|
mutex_unlock(&ufile->umap_lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct vm_operations_struct rdma_umap_ops = {
|
|
.open = rdma_umap_open,
|
|
.close = rdma_umap_close,
|
|
.fault = rdma_umap_fault,
|
|
};
|
|
|
|
void uverbs_user_mmap_disassociate(struct ib_uverbs_file *ufile)
|
|
{
|
|
struct rdma_umap_priv *priv, *next_priv;
|
|
|
|
lockdep_assert_held(&ufile->hw_destroy_rwsem);
|
|
|
|
while (1) {
|
|
struct mm_struct *mm = NULL;
|
|
|
|
/* Get an arbitrary mm pointer that hasn't been cleaned yet */
|
|
mutex_lock(&ufile->umap_lock);
|
|
while (!list_empty(&ufile->umaps)) {
|
|
int ret;
|
|
|
|
priv = list_first_entry(&ufile->umaps,
|
|
struct rdma_umap_priv, list);
|
|
mm = priv->vma->vm_mm;
|
|
ret = mmget_not_zero(mm);
|
|
if (!ret) {
|
|
list_del_init(&priv->list);
|
|
if (priv->entry) {
|
|
rdma_user_mmap_entry_put(priv->entry);
|
|
priv->entry = NULL;
|
|
}
|
|
mm = NULL;
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
mutex_unlock(&ufile->umap_lock);
|
|
if (!mm)
|
|
return;
|
|
|
|
/*
|
|
* The umap_lock is nested under mmap_lock since it used within
|
|
* the vma_ops callbacks, so we have to clean the list one mm
|
|
* at a time to get the lock ordering right. Typically there
|
|
* will only be one mm, so no big deal.
|
|
*/
|
|
mmap_read_lock(mm);
|
|
mutex_lock(&ufile->umap_lock);
|
|
list_for_each_entry_safe (priv, next_priv, &ufile->umaps,
|
|
list) {
|
|
struct vm_area_struct *vma = priv->vma;
|
|
|
|
if (vma->vm_mm != mm)
|
|
continue;
|
|
list_del_init(&priv->list);
|
|
|
|
zap_vma_ptes(vma, vma->vm_start,
|
|
vma->vm_end - vma->vm_start);
|
|
|
|
if (priv->entry) {
|
|
rdma_user_mmap_entry_put(priv->entry);
|
|
priv->entry = NULL;
|
|
}
|
|
}
|
|
mutex_unlock(&ufile->umap_lock);
|
|
mmap_read_unlock(mm);
|
|
mmput(mm);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* ib_uverbs_open() does not need the BKL:
|
|
*
|
|
* - the ib_uverbs_device structures are properly reference counted and
|
|
* everything else is purely local to the file being created, so
|
|
* races against other open calls are not a problem;
|
|
* - there is no ioctl method to race against;
|
|
* - the open method will either immediately run -ENXIO, or all
|
|
* required initialization will be done.
|
|
*/
|
|
static int ib_uverbs_open(struct inode *inode, struct file *filp)
|
|
{
|
|
struct ib_uverbs_device *dev;
|
|
struct ib_uverbs_file *file;
|
|
struct ib_device *ib_dev;
|
|
int ret;
|
|
int module_dependent;
|
|
int srcu_key;
|
|
|
|
dev = container_of(inode->i_cdev, struct ib_uverbs_device, cdev);
|
|
if (!refcount_inc_not_zero(&dev->refcount))
|
|
return -ENXIO;
|
|
|
|
get_device(&dev->dev);
|
|
srcu_key = srcu_read_lock(&dev->disassociate_srcu);
|
|
mutex_lock(&dev->lists_mutex);
|
|
ib_dev = srcu_dereference(dev->ib_dev,
|
|
&dev->disassociate_srcu);
|
|
if (!ib_dev) {
|
|
ret = -EIO;
|
|
goto err;
|
|
}
|
|
|
|
if (!rdma_dev_access_netns(ib_dev, current->nsproxy->net_ns)) {
|
|
ret = -EPERM;
|
|
goto err;
|
|
}
|
|
|
|
/* In case IB device supports disassociate ucontext, there is no hard
|
|
* dependency between uverbs device and its low level device.
|
|
*/
|
|
module_dependent = !(ib_dev->ops.disassociate_ucontext);
|
|
|
|
if (module_dependent) {
|
|
if (!try_module_get(ib_dev->ops.owner)) {
|
|
ret = -ENODEV;
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
file = kzalloc(sizeof(*file), GFP_KERNEL);
|
|
if (!file) {
|
|
ret = -ENOMEM;
|
|
if (module_dependent)
|
|
goto err_module;
|
|
|
|
goto err;
|
|
}
|
|
|
|
file->device = dev;
|
|
kref_init(&file->ref);
|
|
mutex_init(&file->ucontext_lock);
|
|
|
|
spin_lock_init(&file->uobjects_lock);
|
|
INIT_LIST_HEAD(&file->uobjects);
|
|
init_rwsem(&file->hw_destroy_rwsem);
|
|
mutex_init(&file->umap_lock);
|
|
INIT_LIST_HEAD(&file->umaps);
|
|
|
|
filp->private_data = file;
|
|
list_add_tail(&file->list, &dev->uverbs_file_list);
|
|
mutex_unlock(&dev->lists_mutex);
|
|
srcu_read_unlock(&dev->disassociate_srcu, srcu_key);
|
|
|
|
setup_ufile_idr_uobject(file);
|
|
|
|
return stream_open(inode, filp);
|
|
|
|
err_module:
|
|
module_put(ib_dev->ops.owner);
|
|
|
|
err:
|
|
mutex_unlock(&dev->lists_mutex);
|
|
srcu_read_unlock(&dev->disassociate_srcu, srcu_key);
|
|
if (refcount_dec_and_test(&dev->refcount))
|
|
ib_uverbs_comp_dev(dev);
|
|
|
|
put_device(&dev->dev);
|
|
return ret;
|
|
}
|
|
|
|
static int ib_uverbs_close(struct inode *inode, struct file *filp)
|
|
{
|
|
struct ib_uverbs_file *file = filp->private_data;
|
|
|
|
uverbs_destroy_ufile_hw(file, RDMA_REMOVE_CLOSE);
|
|
|
|
mutex_lock(&file->device->lists_mutex);
|
|
list_del_init(&file->list);
|
|
mutex_unlock(&file->device->lists_mutex);
|
|
|
|
kref_put(&file->ref, ib_uverbs_release_file);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct file_operations uverbs_fops = {
|
|
.owner = THIS_MODULE,
|
|
.write = ib_uverbs_write,
|
|
.open = ib_uverbs_open,
|
|
.release = ib_uverbs_close,
|
|
.llseek = no_llseek,
|
|
.unlocked_ioctl = ib_uverbs_ioctl,
|
|
.compat_ioctl = compat_ptr_ioctl,
|
|
};
|
|
|
|
static const struct file_operations uverbs_mmap_fops = {
|
|
.owner = THIS_MODULE,
|
|
.write = ib_uverbs_write,
|
|
.mmap = ib_uverbs_mmap,
|
|
.open = ib_uverbs_open,
|
|
.release = ib_uverbs_close,
|
|
.llseek = no_llseek,
|
|
.unlocked_ioctl = ib_uverbs_ioctl,
|
|
.compat_ioctl = compat_ptr_ioctl,
|
|
};
|
|
|
|
static int ib_uverbs_get_nl_info(struct ib_device *ibdev, void *client_data,
|
|
struct ib_client_nl_info *res)
|
|
{
|
|
struct ib_uverbs_device *uverbs_dev = client_data;
|
|
int ret;
|
|
|
|
if (res->port != -1)
|
|
return -EINVAL;
|
|
|
|
res->abi = ibdev->ops.uverbs_abi_ver;
|
|
res->cdev = &uverbs_dev->dev;
|
|
|
|
/*
|
|
* To support DRIVER_ID binding in userspace some of the driver need
|
|
* upgrading to expose their PCI dependent revision information
|
|
* through get_context instead of relying on modalias matching. When
|
|
* the drivers are fixed they can drop this flag.
|
|
*/
|
|
if (!ibdev->ops.uverbs_no_driver_id_binding) {
|
|
ret = nla_put_u32(res->nl_msg, RDMA_NLDEV_ATTR_UVERBS_DRIVER_ID,
|
|
ibdev->ops.driver_id);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static struct ib_client uverbs_client = {
|
|
.name = "uverbs",
|
|
.no_kverbs_req = true,
|
|
.add = ib_uverbs_add_one,
|
|
.remove = ib_uverbs_remove_one,
|
|
.get_nl_info = ib_uverbs_get_nl_info,
|
|
};
|
|
MODULE_ALIAS_RDMA_CLIENT("uverbs");
|
|
|
|
static ssize_t ibdev_show(struct device *device, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct ib_uverbs_device *dev =
|
|
container_of(device, struct ib_uverbs_device, dev);
|
|
int ret = -ENODEV;
|
|
int srcu_key;
|
|
struct ib_device *ib_dev;
|
|
|
|
srcu_key = srcu_read_lock(&dev->disassociate_srcu);
|
|
ib_dev = srcu_dereference(dev->ib_dev, &dev->disassociate_srcu);
|
|
if (ib_dev)
|
|
ret = sysfs_emit(buf, "%s\n", dev_name(&ib_dev->dev));
|
|
srcu_read_unlock(&dev->disassociate_srcu, srcu_key);
|
|
|
|
return ret;
|
|
}
|
|
static DEVICE_ATTR_RO(ibdev);
|
|
|
|
static ssize_t abi_version_show(struct device *device,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct ib_uverbs_device *dev =
|
|
container_of(device, struct ib_uverbs_device, dev);
|
|
int ret = -ENODEV;
|
|
int srcu_key;
|
|
struct ib_device *ib_dev;
|
|
|
|
srcu_key = srcu_read_lock(&dev->disassociate_srcu);
|
|
ib_dev = srcu_dereference(dev->ib_dev, &dev->disassociate_srcu);
|
|
if (ib_dev)
|
|
ret = sysfs_emit(buf, "%u\n", ib_dev->ops.uverbs_abi_ver);
|
|
srcu_read_unlock(&dev->disassociate_srcu, srcu_key);
|
|
|
|
return ret;
|
|
}
|
|
static DEVICE_ATTR_RO(abi_version);
|
|
|
|
static struct attribute *ib_dev_attrs[] = {
|
|
&dev_attr_abi_version.attr,
|
|
&dev_attr_ibdev.attr,
|
|
NULL,
|
|
};
|
|
|
|
static const struct attribute_group dev_attr_group = {
|
|
.attrs = ib_dev_attrs,
|
|
};
|
|
|
|
static CLASS_ATTR_STRING(abi_version, S_IRUGO,
|
|
__stringify(IB_USER_VERBS_ABI_VERSION));
|
|
|
|
static int ib_uverbs_create_uapi(struct ib_device *device,
|
|
struct ib_uverbs_device *uverbs_dev)
|
|
{
|
|
struct uverbs_api *uapi;
|
|
|
|
uapi = uverbs_alloc_api(device);
|
|
if (IS_ERR(uapi))
|
|
return PTR_ERR(uapi);
|
|
|
|
uverbs_dev->uapi = uapi;
|
|
return 0;
|
|
}
|
|
|
|
static int ib_uverbs_add_one(struct ib_device *device)
|
|
{
|
|
int devnum;
|
|
dev_t base;
|
|
struct ib_uverbs_device *uverbs_dev;
|
|
int ret;
|
|
|
|
if (!device->ops.alloc_ucontext)
|
|
return -EOPNOTSUPP;
|
|
|
|
uverbs_dev = kzalloc(sizeof(*uverbs_dev), GFP_KERNEL);
|
|
if (!uverbs_dev)
|
|
return -ENOMEM;
|
|
|
|
ret = init_srcu_struct(&uverbs_dev->disassociate_srcu);
|
|
if (ret) {
|
|
kfree(uverbs_dev);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
device_initialize(&uverbs_dev->dev);
|
|
uverbs_dev->dev.class = &uverbs_class;
|
|
uverbs_dev->dev.parent = device->dev.parent;
|
|
uverbs_dev->dev.release = ib_uverbs_release_dev;
|
|
uverbs_dev->groups[0] = &dev_attr_group;
|
|
uverbs_dev->dev.groups = uverbs_dev->groups;
|
|
refcount_set(&uverbs_dev->refcount, 1);
|
|
init_completion(&uverbs_dev->comp);
|
|
uverbs_dev->xrcd_tree = RB_ROOT;
|
|
mutex_init(&uverbs_dev->xrcd_tree_mutex);
|
|
mutex_init(&uverbs_dev->lists_mutex);
|
|
INIT_LIST_HEAD(&uverbs_dev->uverbs_file_list);
|
|
rcu_assign_pointer(uverbs_dev->ib_dev, device);
|
|
uverbs_dev->num_comp_vectors = device->num_comp_vectors;
|
|
|
|
devnum = ida_alloc_max(&uverbs_ida, IB_UVERBS_MAX_DEVICES - 1,
|
|
GFP_KERNEL);
|
|
if (devnum < 0) {
|
|
ret = -ENOMEM;
|
|
goto err;
|
|
}
|
|
uverbs_dev->devnum = devnum;
|
|
if (devnum >= IB_UVERBS_NUM_FIXED_MINOR)
|
|
base = dynamic_uverbs_dev + devnum - IB_UVERBS_NUM_FIXED_MINOR;
|
|
else
|
|
base = IB_UVERBS_BASE_DEV + devnum;
|
|
|
|
ret = ib_uverbs_create_uapi(device, uverbs_dev);
|
|
if (ret)
|
|
goto err_uapi;
|
|
|
|
uverbs_dev->dev.devt = base;
|
|
dev_set_name(&uverbs_dev->dev, "uverbs%d", uverbs_dev->devnum);
|
|
|
|
cdev_init(&uverbs_dev->cdev,
|
|
device->ops.mmap ? &uverbs_mmap_fops : &uverbs_fops);
|
|
uverbs_dev->cdev.owner = THIS_MODULE;
|
|
|
|
ret = cdev_device_add(&uverbs_dev->cdev, &uverbs_dev->dev);
|
|
if (ret)
|
|
goto err_uapi;
|
|
|
|
ib_set_client_data(device, &uverbs_client, uverbs_dev);
|
|
return 0;
|
|
|
|
err_uapi:
|
|
ida_free(&uverbs_ida, devnum);
|
|
err:
|
|
if (refcount_dec_and_test(&uverbs_dev->refcount))
|
|
ib_uverbs_comp_dev(uverbs_dev);
|
|
wait_for_completion(&uverbs_dev->comp);
|
|
put_device(&uverbs_dev->dev);
|
|
return ret;
|
|
}
|
|
|
|
static void ib_uverbs_free_hw_resources(struct ib_uverbs_device *uverbs_dev,
|
|
struct ib_device *ib_dev)
|
|
{
|
|
struct ib_uverbs_file *file;
|
|
|
|
/* Pending running commands to terminate */
|
|
uverbs_disassociate_api_pre(uverbs_dev);
|
|
|
|
mutex_lock(&uverbs_dev->lists_mutex);
|
|
while (!list_empty(&uverbs_dev->uverbs_file_list)) {
|
|
file = list_first_entry(&uverbs_dev->uverbs_file_list,
|
|
struct ib_uverbs_file, list);
|
|
list_del_init(&file->list);
|
|
kref_get(&file->ref);
|
|
|
|
/* We must release the mutex before going ahead and calling
|
|
* uverbs_cleanup_ufile, as it might end up indirectly calling
|
|
* uverbs_close, for example due to freeing the resources (e.g
|
|
* mmput).
|
|
*/
|
|
mutex_unlock(&uverbs_dev->lists_mutex);
|
|
|
|
uverbs_destroy_ufile_hw(file, RDMA_REMOVE_DRIVER_REMOVE);
|
|
kref_put(&file->ref, ib_uverbs_release_file);
|
|
|
|
mutex_lock(&uverbs_dev->lists_mutex);
|
|
}
|
|
mutex_unlock(&uverbs_dev->lists_mutex);
|
|
|
|
uverbs_disassociate_api(uverbs_dev->uapi);
|
|
}
|
|
|
|
static void ib_uverbs_remove_one(struct ib_device *device, void *client_data)
|
|
{
|
|
struct ib_uverbs_device *uverbs_dev = client_data;
|
|
int wait_clients = 1;
|
|
|
|
cdev_device_del(&uverbs_dev->cdev, &uverbs_dev->dev);
|
|
ida_free(&uverbs_ida, uverbs_dev->devnum);
|
|
|
|
if (device->ops.disassociate_ucontext) {
|
|
/* We disassociate HW resources and immediately return.
|
|
* Userspace will see a EIO errno for all future access.
|
|
* Upon returning, ib_device may be freed internally and is not
|
|
* valid any more.
|
|
* uverbs_device is still available until all clients close
|
|
* their files, then the uverbs device ref count will be zero
|
|
* and its resources will be freed.
|
|
* Note: At this point no more files can be opened since the
|
|
* cdev was deleted, however active clients can still issue
|
|
* commands and close their open files.
|
|
*/
|
|
ib_uverbs_free_hw_resources(uverbs_dev, device);
|
|
wait_clients = 0;
|
|
}
|
|
|
|
if (refcount_dec_and_test(&uverbs_dev->refcount))
|
|
ib_uverbs_comp_dev(uverbs_dev);
|
|
if (wait_clients)
|
|
wait_for_completion(&uverbs_dev->comp);
|
|
|
|
put_device(&uverbs_dev->dev);
|
|
}
|
|
|
|
static int __init ib_uverbs_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = register_chrdev_region(IB_UVERBS_BASE_DEV,
|
|
IB_UVERBS_NUM_FIXED_MINOR,
|
|
"infiniband_verbs");
|
|
if (ret) {
|
|
pr_err("user_verbs: couldn't register device number\n");
|
|
goto out;
|
|
}
|
|
|
|
ret = alloc_chrdev_region(&dynamic_uverbs_dev, 0,
|
|
IB_UVERBS_NUM_DYNAMIC_MINOR,
|
|
"infiniband_verbs");
|
|
if (ret) {
|
|
pr_err("couldn't register dynamic device number\n");
|
|
goto out_alloc;
|
|
}
|
|
|
|
ret = class_register(&uverbs_class);
|
|
if (ret) {
|
|
pr_err("user_verbs: couldn't create class infiniband_verbs\n");
|
|
goto out_chrdev;
|
|
}
|
|
|
|
ret = class_create_file(&uverbs_class, &class_attr_abi_version.attr);
|
|
if (ret) {
|
|
pr_err("user_verbs: couldn't create abi_version attribute\n");
|
|
goto out_class;
|
|
}
|
|
|
|
ret = ib_register_client(&uverbs_client);
|
|
if (ret) {
|
|
pr_err("user_verbs: couldn't register client\n");
|
|
goto out_class;
|
|
}
|
|
|
|
return 0;
|
|
|
|
out_class:
|
|
class_unregister(&uverbs_class);
|
|
|
|
out_chrdev:
|
|
unregister_chrdev_region(dynamic_uverbs_dev,
|
|
IB_UVERBS_NUM_DYNAMIC_MINOR);
|
|
|
|
out_alloc:
|
|
unregister_chrdev_region(IB_UVERBS_BASE_DEV,
|
|
IB_UVERBS_NUM_FIXED_MINOR);
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static void __exit ib_uverbs_cleanup(void)
|
|
{
|
|
ib_unregister_client(&uverbs_client);
|
|
class_unregister(&uverbs_class);
|
|
unregister_chrdev_region(IB_UVERBS_BASE_DEV,
|
|
IB_UVERBS_NUM_FIXED_MINOR);
|
|
unregister_chrdev_region(dynamic_uverbs_dev,
|
|
IB_UVERBS_NUM_DYNAMIC_MINOR);
|
|
mmu_notifier_synchronize();
|
|
}
|
|
|
|
module_init(ib_uverbs_init);
|
|
module_exit(ib_uverbs_cleanup);
|